Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_pscsi.c |
| 3 | * |
| 4 | * This file contains the generic target mode <-> Linux SCSI subsystem plugin. |
| 5 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 6 | * (c) Copyright 2003-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 7 | * |
| 8 | * Nicholas A. Bellinger <nab@kernel.org> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | * |
| 24 | ******************************************************************************/ |
| 25 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 26 | #include <linux/string.h> |
| 27 | #include <linux/parser.h> |
| 28 | #include <linux/timer.h> |
| 29 | #include <linux/blkdev.h> |
| 30 | #include <linux/blk_types.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 33 | #include <linux/genhd.h> |
| 34 | #include <linux/cdrom.h> |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 35 | #include <linux/ratelimit.h> |
Paul Gortmaker | 827509e | 2011-08-30 14:20:44 -0400 | [diff] [blame] | 36 | #include <linux/module.h> |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 37 | #include <asm/unaligned.h> |
| 38 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 39 | #include <scsi/scsi_device.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 40 | #include <scsi/scsi_host.h> |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 41 | #include <scsi/scsi_tcq.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 42 | |
| 43 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 44 | #include <target/target_core_backend.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 45 | |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 46 | #include "target_core_alua.h" |
Nicholas Bellinger | 29a05de | 2015-03-22 20:42:19 -0700 | [diff] [blame] | 47 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 48 | #include "target_core_pscsi.h" |
| 49 | |
| 50 | #define ISPRINT(a) ((a >= ' ') && (a <= '~')) |
| 51 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 52 | static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) |
| 53 | { |
| 54 | return container_of(dev, struct pscsi_dev_virt, dev); |
| 55 | } |
| 56 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 57 | static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 58 | static void pscsi_req_done(struct request *, int); |
| 59 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 60 | /* pscsi_attach_hba(): |
| 61 | * |
| 62 | * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. |
| 63 | * from the passed SCSI Host ID. |
| 64 | */ |
| 65 | static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) |
| 66 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 67 | struct pscsi_hba_virt *phv; |
| 68 | |
| 69 | phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 70 | if (!phv) { |
| 71 | pr_err("Unable to allocate struct pscsi_hba_virt\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 72 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 73 | } |
| 74 | phv->phv_host_id = host_id; |
Stefan Hajnoczi | e6a8a41 | 2012-02-23 18:15:26 +0000 | [diff] [blame] | 75 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 76 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 77 | hba->hba_ptr = phv; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 78 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 79 | pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 80 | " Generic Target Core Stack %s\n", hba->hba_id, |
Christoph Hellwig | ce8dd25 | 2015-06-19 15:14:39 +0200 | [diff] [blame] | 81 | PSCSI_VERSION, TARGET_CORE_VERSION); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 82 | pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 83 | hba->hba_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | static void pscsi_detach_hba(struct se_hba *hba) |
| 89 | { |
| 90 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
| 91 | struct Scsi_Host *scsi_host = phv->phv_lld_host; |
| 92 | |
| 93 | if (scsi_host) { |
| 94 | scsi_host_put(scsi_host); |
| 95 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 96 | pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 97 | " Generic Target Core\n", hba->hba_id, |
| 98 | (scsi_host->hostt->name) ? (scsi_host->hostt->name) : |
| 99 | "Unknown"); |
| 100 | } else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 101 | pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 102 | " from Generic Target Core\n", hba->hba_id); |
| 103 | |
| 104 | kfree(phv); |
| 105 | hba->hba_ptr = NULL; |
| 106 | } |
| 107 | |
| 108 | static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) |
| 109 | { |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 110 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 111 | struct Scsi_Host *sh = phv->phv_lld_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 112 | /* |
| 113 | * Release the struct Scsi_Host |
| 114 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 115 | if (!mode_flag) { |
| 116 | if (!sh) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 117 | return 0; |
| 118 | |
| 119 | phv->phv_lld_host = NULL; |
Stefan Hajnoczi | e6a8a41 | 2012-02-23 18:15:26 +0000 | [diff] [blame] | 120 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 121 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 122 | pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 123 | " %s\n", hba->hba_id, (sh->hostt->name) ? |
| 124 | (sh->hostt->name) : "Unknown"); |
| 125 | |
| 126 | scsi_host_put(sh); |
| 127 | return 0; |
| 128 | } |
| 129 | /* |
| 130 | * Otherwise, locate struct Scsi_Host from the original passed |
| 131 | * pSCSI Host ID and enable for phba mode |
| 132 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 133 | sh = scsi_host_lookup(phv->phv_host_id); |
Wei Yongjun | 58932e9 | 2013-10-25 21:53:33 +0800 | [diff] [blame] | 134 | if (!sh) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 135 | pr_err("pSCSI: Unable to locate SCSI Host for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 136 | " phv_host_id: %d\n", phv->phv_host_id); |
Wei Yongjun | 58932e9 | 2013-10-25 21:53:33 +0800 | [diff] [blame] | 137 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 138 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 139 | |
| 140 | phv->phv_lld_host = sh; |
| 141 | phv->phv_mode = PHV_LLD_SCSI_HOST_NO; |
| 142 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 143 | pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 144 | hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); |
| 145 | |
| 146 | return 1; |
| 147 | } |
| 148 | |
| 149 | static void pscsi_tape_read_blocksize(struct se_device *dev, |
| 150 | struct scsi_device *sdev) |
| 151 | { |
| 152 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; |
| 153 | int ret; |
| 154 | |
| 155 | buf = kzalloc(12, GFP_KERNEL); |
| 156 | if (!buf) |
| 157 | return; |
| 158 | |
| 159 | memset(cdb, 0, MAX_COMMAND_SIZE); |
| 160 | cdb[0] = MODE_SENSE; |
| 161 | cdb[4] = 0x0c; /* 12 bytes */ |
| 162 | |
| 163 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, |
| 164 | HZ, 1, NULL); |
| 165 | if (ret) |
| 166 | goto out_free; |
| 167 | |
| 168 | /* |
| 169 | * If MODE_SENSE still returns zero, set the default value to 1024. |
| 170 | */ |
| 171 | sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); |
| 172 | if (!sdev->sector_size) |
| 173 | sdev->sector_size = 1024; |
| 174 | out_free: |
| 175 | kfree(buf); |
| 176 | } |
| 177 | |
| 178 | static void |
| 179 | pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) |
| 180 | { |
| 181 | unsigned char *buf; |
| 182 | |
| 183 | if (sdev->inquiry_len < INQUIRY_LEN) |
| 184 | return; |
| 185 | |
| 186 | buf = sdev->inquiry; |
| 187 | if (!buf) |
| 188 | return; |
| 189 | /* |
| 190 | * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() |
| 191 | */ |
| 192 | memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); |
| 193 | memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); |
| 194 | memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); |
| 195 | } |
| 196 | |
| 197 | static int |
| 198 | pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) |
| 199 | { |
| 200 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; |
| 201 | int ret; |
| 202 | |
| 203 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); |
| 204 | if (!buf) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 205 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 206 | |
| 207 | memset(cdb, 0, MAX_COMMAND_SIZE); |
| 208 | cdb[0] = INQUIRY; |
| 209 | cdb[1] = 0x01; /* Query VPD */ |
| 210 | cdb[2] = 0x80; /* Unit Serial Number */ |
| 211 | cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; |
| 212 | cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); |
| 213 | |
| 214 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, |
| 215 | INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); |
| 216 | if (ret) |
| 217 | goto out_free; |
| 218 | |
| 219 | snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); |
| 220 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 221 | wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 222 | |
| 223 | kfree(buf); |
| 224 | return 0; |
| 225 | |
| 226 | out_free: |
| 227 | kfree(buf); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 228 | return -EPERM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | static void |
| 232 | pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, |
| 233 | struct t10_wwn *wwn) |
| 234 | { |
| 235 | unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; |
| 236 | int ident_len, page_len, off = 4, ret; |
| 237 | struct t10_vpd *vpd; |
| 238 | |
| 239 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); |
| 240 | if (!buf) |
| 241 | return; |
| 242 | |
| 243 | memset(cdb, 0, MAX_COMMAND_SIZE); |
| 244 | cdb[0] = INQUIRY; |
| 245 | cdb[1] = 0x01; /* Query VPD */ |
| 246 | cdb[2] = 0x83; /* Device Identifier */ |
| 247 | cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; |
| 248 | cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); |
| 249 | |
| 250 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, |
| 251 | INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, |
| 252 | NULL, HZ, 1, NULL); |
| 253 | if (ret) |
| 254 | goto out; |
| 255 | |
| 256 | page_len = (buf[2] << 8) | buf[3]; |
| 257 | while (page_len > 0) { |
| 258 | /* Grab a pointer to the Identification descriptor */ |
| 259 | page_83 = &buf[off]; |
| 260 | ident_len = page_83[3]; |
| 261 | if (!ident_len) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 262 | pr_err("page_83[3]: identifier" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 263 | " length zero!\n"); |
| 264 | break; |
| 265 | } |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 266 | pr_debug("T10 VPD Identifier Length: %d\n", ident_len); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 267 | |
| 268 | vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); |
| 269 | if (!vpd) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 270 | pr_err("Unable to allocate memory for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 271 | " struct t10_vpd\n"); |
| 272 | goto out; |
| 273 | } |
| 274 | INIT_LIST_HEAD(&vpd->vpd_list); |
| 275 | |
| 276 | transport_set_vpd_proto_id(vpd, page_83); |
| 277 | transport_set_vpd_assoc(vpd, page_83); |
| 278 | |
| 279 | if (transport_set_vpd_ident_type(vpd, page_83) < 0) { |
| 280 | off += (ident_len + 4); |
| 281 | page_len -= (ident_len + 4); |
| 282 | kfree(vpd); |
| 283 | continue; |
| 284 | } |
| 285 | if (transport_set_vpd_ident(vpd, page_83) < 0) { |
| 286 | off += (ident_len + 4); |
| 287 | page_len -= (ident_len + 4); |
| 288 | kfree(vpd); |
| 289 | continue; |
| 290 | } |
| 291 | |
| 292 | list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); |
| 293 | off += (ident_len + 4); |
| 294 | page_len -= (ident_len + 4); |
| 295 | } |
| 296 | |
| 297 | out: |
| 298 | kfree(buf); |
| 299 | } |
| 300 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 301 | static int pscsi_add_device_to_list(struct se_device *dev, |
| 302 | struct scsi_device *sd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 303 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 304 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
| 305 | struct request_queue *q = sd->request_queue; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 306 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 307 | pdv->pdv_sd = sd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 308 | |
| 309 | if (!sd->queue_depth) { |
| 310 | sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; |
| 311 | |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 312 | pr_err("Set broken SCSI Device %d:%d:%llu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 313 | " queue_depth to %d\n", sd->channel, sd->id, |
| 314 | sd->lun, sd->queue_depth); |
| 315 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 316 | |
| 317 | dev->dev_attrib.hw_block_size = sd->sector_size; |
| 318 | dev->dev_attrib.hw_max_sectors = |
| 319 | min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); |
| 320 | dev->dev_attrib.hw_queue_depth = sd->queue_depth; |
| 321 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 322 | /* |
| 323 | * Setup our standard INQUIRY info into se_dev->t10_wwn |
| 324 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 325 | pscsi_set_inquiry_info(sd, &dev->t10_wwn); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 326 | |
| 327 | /* |
| 328 | * Locate VPD WWN Information used for various purposes within |
| 329 | * the Storage Engine. |
| 330 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 331 | if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 332 | /* |
| 333 | * If VPD Unit Serial returned GOOD status, try |
| 334 | * VPD Device Identification page (0x83). |
| 335 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 336 | pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | /* |
| 340 | * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. |
| 341 | */ |
| 342 | if (sd->type == TYPE_TAPE) |
| 343 | pscsi_tape_read_blocksize(dev, sd); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 344 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 345 | } |
| 346 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 347 | static struct se_device *pscsi_alloc_device(struct se_hba *hba, |
| 348 | const char *name) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 349 | { |
| 350 | struct pscsi_dev_virt *pdv; |
| 351 | |
| 352 | pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 353 | if (!pdv) { |
| 354 | pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 355 | return NULL; |
| 356 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 357 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 358 | pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 359 | return &pdv->dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | /* |
| 363 | * Called with struct Scsi_Host->host_lock called. |
| 364 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 365 | static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) |
Dan Carpenter | 5dd7ed2 | 2011-03-14 04:06:01 -0700 | [diff] [blame] | 366 | __releases(sh->host_lock) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 367 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 368 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
| 369 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 370 | struct Scsi_Host *sh = sd->host; |
| 371 | struct block_device *bd; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 372 | int ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 373 | |
| 374 | if (scsi_device_get(sd)) { |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 375 | pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 376 | sh->host_no, sd->channel, sd->id, sd->lun); |
| 377 | spin_unlock_irq(sh->host_lock); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 378 | return -EIO; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 379 | } |
| 380 | spin_unlock_irq(sh->host_lock); |
| 381 | /* |
| 382 | * Claim exclusive struct block_device access to struct scsi_device |
| 383 | * for TYPE_DISK using supplied udev_path |
| 384 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 385 | bd = blkdev_get_by_path(dev->udev_path, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 386 | FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); |
Dan Carpenter | 3ae279d | 2011-02-09 15:34:36 -0800 | [diff] [blame] | 387 | if (IS_ERR(bd)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 388 | pr_err("pSCSI: blkdev_get_by_path() failed\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 389 | scsi_device_put(sd); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 390 | return PTR_ERR(bd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 391 | } |
| 392 | pdv->pdv_bd = bd; |
| 393 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 394 | ret = pscsi_add_device_to_list(dev, sd); |
| 395 | if (ret) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 396 | blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
| 397 | scsi_device_put(sd); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 398 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 399 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 400 | |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 401 | pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 402 | phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 403 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 404 | } |
| 405 | |
| 406 | /* |
| 407 | * Called with struct Scsi_Host->host_lock called. |
| 408 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 409 | static int pscsi_create_type_rom(struct se_device *dev, struct scsi_device *sd) |
Dan Carpenter | 5dd7ed2 | 2011-03-14 04:06:01 -0700 | [diff] [blame] | 410 | __releases(sh->host_lock) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 411 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 412 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 413 | struct Scsi_Host *sh = sd->host; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 414 | int ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 415 | |
| 416 | if (scsi_device_get(sd)) { |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 417 | pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 418 | sh->host_no, sd->channel, sd->id, sd->lun); |
| 419 | spin_unlock_irq(sh->host_lock); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 420 | return -EIO; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 421 | } |
| 422 | spin_unlock_irq(sh->host_lock); |
| 423 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 424 | ret = pscsi_add_device_to_list(dev, sd); |
| 425 | if (ret) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 426 | scsi_device_put(sd); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 427 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 428 | } |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 429 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 430 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
| 431 | sd->channel, sd->id, sd->lun); |
| 432 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 433 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | /* |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 437 | * Called with struct Scsi_Host->host_lock called. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 438 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 439 | static int pscsi_create_type_other(struct se_device *dev, |
| 440 | struct scsi_device *sd) |
Dan Carpenter | 5dd7ed2 | 2011-03-14 04:06:01 -0700 | [diff] [blame] | 441 | __releases(sh->host_lock) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 442 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 443 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 444 | struct Scsi_Host *sh = sd->host; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 445 | int ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 446 | |
| 447 | spin_unlock_irq(sh->host_lock); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 448 | ret = pscsi_add_device_to_list(dev, sd); |
| 449 | if (ret) |
| 450 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 451 | |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 452 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 453 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
| 454 | sd->channel, sd->id, sd->lun); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 455 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 456 | } |
| 457 | |
Fengguang Wu | ecf0dd6 | 2012-10-10 07:30:20 +0800 | [diff] [blame] | 458 | static int pscsi_configure_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 459 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 460 | struct se_hba *hba = dev->se_hba; |
| 461 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 462 | struct scsi_device *sd; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 463 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 464 | struct Scsi_Host *sh = phv->phv_lld_host; |
| 465 | int legacy_mode_enable = 0; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 466 | int ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 467 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 468 | if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || |
| 469 | !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || |
| 470 | !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { |
| 471 | pr_err("Missing scsi_channel_id=, scsi_target_id= and" |
| 472 | " scsi_lun_id= parameters\n"); |
| 473 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 474 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 475 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 476 | /* |
| 477 | * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the |
| 478 | * struct Scsi_Host we will need to bring the TCM/pSCSI object online |
| 479 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 480 | if (!sh) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 481 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 482 | pr_err("pSCSI: Unable to locate struct" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 483 | " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 484 | return -ENODEV; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 485 | } |
| 486 | /* |
Stefan Hajnoczi | e6a8a41 | 2012-02-23 18:15:26 +0000 | [diff] [blame] | 487 | * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 488 | * reference, we enforce that udev_path has been set |
| 489 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 490 | if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 491 | pr_err("pSCSI: udev_path attribute has not" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 492 | " been set before ENABLE=1\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 493 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 494 | } |
| 495 | /* |
Stefan Hajnoczi | e6a8a41 | 2012-02-23 18:15:26 +0000 | [diff] [blame] | 496 | * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 497 | * use the original TCM hba ID to reference Linux/SCSI Host No |
| 498 | * and enable for PHV_LLD_SCSI_HOST_NO mode. |
| 499 | */ |
| 500 | if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 501 | if (hba->dev_count) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 502 | pr_err("pSCSI: Unable to set hba_mode" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 503 | " with active devices\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 504 | return -EEXIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 505 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 506 | |
| 507 | if (pscsi_pmode_enable_hba(hba, 1) != 1) |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 508 | return -ENODEV; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 509 | |
| 510 | legacy_mode_enable = 1; |
| 511 | hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; |
| 512 | sh = phv->phv_lld_host; |
| 513 | } else { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 514 | sh = scsi_host_lookup(pdv->pdv_host_id); |
Wei Yongjun | 58932e9 | 2013-10-25 21:53:33 +0800 | [diff] [blame] | 515 | if (!sh) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 516 | pr_err("pSCSI: Unable to locate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 517 | " pdv_host_id: %d\n", pdv->pdv_host_id); |
Wei Yongjun | 58932e9 | 2013-10-25 21:53:33 +0800 | [diff] [blame] | 518 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 519 | } |
Andy Grover | 5a7125c | 2015-05-22 14:07:44 -0700 | [diff] [blame] | 520 | pdv->pdv_lld_host = sh; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 521 | } |
| 522 | } else { |
Stefan Hajnoczi | e6a8a41 | 2012-02-23 18:15:26 +0000 | [diff] [blame] | 523 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { |
| 524 | pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 525 | " struct Scsi_Host exists\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 526 | return -EEXIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 527 | } |
| 528 | } |
| 529 | |
| 530 | spin_lock_irq(sh->host_lock); |
| 531 | list_for_each_entry(sd, &sh->__devices, siblings) { |
| 532 | if ((pdv->pdv_channel_id != sd->channel) || |
| 533 | (pdv->pdv_target_id != sd->id) || |
| 534 | (pdv->pdv_lun_id != sd->lun)) |
| 535 | continue; |
| 536 | /* |
| 537 | * Functions will release the held struct scsi_host->host_lock |
| 538 | * before calling calling pscsi_add_device_to_list() to register |
| 539 | * struct scsi_device with target_core_mod. |
| 540 | */ |
| 541 | switch (sd->type) { |
| 542 | case TYPE_DISK: |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 543 | ret = pscsi_create_type_disk(dev, sd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 544 | break; |
| 545 | case TYPE_ROM: |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 546 | ret = pscsi_create_type_rom(dev, sd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 547 | break; |
| 548 | default: |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 549 | ret = pscsi_create_type_other(dev, sd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 550 | break; |
| 551 | } |
| 552 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 553 | if (ret) { |
Stefan Hajnoczi | e6a8a41 | 2012-02-23 18:15:26 +0000 | [diff] [blame] | 554 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 555 | scsi_host_put(sh); |
| 556 | else if (legacy_mode_enable) { |
| 557 | pscsi_pmode_enable_hba(hba, 0); |
| 558 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; |
| 559 | } |
| 560 | pdv->pdv_sd = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 561 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 562 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 563 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 564 | } |
| 565 | spin_unlock_irq(sh->host_lock); |
| 566 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 567 | pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 568 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); |
| 569 | |
Stefan Hajnoczi | e6a8a41 | 2012-02-23 18:15:26 +0000 | [diff] [blame] | 570 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 571 | scsi_host_put(sh); |
| 572 | else if (legacy_mode_enable) { |
| 573 | pscsi_pmode_enable_hba(hba, 0); |
| 574 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; |
| 575 | } |
| 576 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 577 | return -ENODEV; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 578 | } |
| 579 | |
Nicholas Bellinger | 4cc987e | 2015-05-19 00:03:07 -0700 | [diff] [blame] | 580 | static void pscsi_dev_call_rcu(struct rcu_head *p) |
| 581 | { |
| 582 | struct se_device *dev = container_of(p, struct se_device, rcu_head); |
| 583 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
| 584 | |
| 585 | kfree(pdv); |
| 586 | } |
| 587 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 588 | static void pscsi_free_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 589 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 590 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
| 591 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 592 | struct scsi_device *sd = pdv->pdv_sd; |
| 593 | |
| 594 | if (sd) { |
| 595 | /* |
| 596 | * Release exclusive pSCSI internal struct block_device claim for |
| 597 | * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() |
| 598 | */ |
| 599 | if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { |
| 600 | blkdev_put(pdv->pdv_bd, |
| 601 | FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
| 602 | pdv->pdv_bd = NULL; |
| 603 | } |
| 604 | /* |
| 605 | * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference |
| 606 | * to struct Scsi_Host now. |
| 607 | */ |
| 608 | if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && |
| 609 | (phv->phv_lld_host != NULL)) |
| 610 | scsi_host_put(phv->phv_lld_host); |
Andy Grover | 5a7125c | 2015-05-22 14:07:44 -0700 | [diff] [blame] | 611 | else if (pdv->pdv_lld_host) |
| 612 | scsi_host_put(pdv->pdv_lld_host); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 613 | |
| 614 | if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) |
| 615 | scsi_device_put(sd); |
| 616 | |
| 617 | pdv->pdv_sd = NULL; |
| 618 | } |
Nicholas Bellinger | 4cc987e | 2015-05-19 00:03:07 -0700 | [diff] [blame] | 619 | call_rcu(&dev->rcu_head, pscsi_dev_call_rcu); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 620 | } |
| 621 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 622 | static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, |
| 623 | unsigned char *sense_buffer) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 624 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 625 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 626 | struct scsi_device *sd = pdv->pdv_sd; |
| 627 | int result; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 628 | struct pscsi_plugin_task *pt = cmd->priv; |
Nicholas Bellinger | 1d2a2cd | 2012-08-08 00:14:13 +0000 | [diff] [blame] | 629 | unsigned char *cdb; |
| 630 | /* |
| 631 | * Special case for REPORT_LUNs handling where pscsi_plugin_task has |
| 632 | * not been allocated because TCM is handling the emulation directly. |
| 633 | */ |
| 634 | if (!pt) |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 635 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 636 | |
Nicholas Bellinger | 1d2a2cd | 2012-08-08 00:14:13 +0000 | [diff] [blame] | 637 | cdb = &pt->pscsi_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 638 | result = pt->pscsi_result; |
| 639 | /* |
| 640 | * Hack to make sure that Write-Protect modepage is set if R/O mode is |
| 641 | * forced. |
| 642 | */ |
Nicholas Bellinger | 29a05de | 2015-03-22 20:42:19 -0700 | [diff] [blame] | 643 | if (!cmd->data_length) |
Paolo Bonzini | 306c11b | 2012-09-07 17:30:32 +0200 | [diff] [blame] | 644 | goto after_mode_sense; |
| 645 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 646 | if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && |
| 647 | (status_byte(result) << 1) == SAM_STAT_GOOD) { |
Nicholas Bellinger | 29a05de | 2015-03-22 20:42:19 -0700 | [diff] [blame] | 648 | bool read_only = target_lun_is_rdonly(cmd); |
| 649 | |
| 650 | if (read_only) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 651 | unsigned char *buf; |
| 652 | |
| 653 | buf = transport_kmap_data_sg(cmd); |
| 654 | if (!buf) |
| 655 | ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 656 | |
| 657 | if (cdb[0] == MODE_SENSE_10) { |
| 658 | if (!(buf[3] & 0x80)) |
| 659 | buf[3] |= 0x80; |
| 660 | } else { |
| 661 | if (!(buf[2] & 0x80)) |
| 662 | buf[2] |= 0x80; |
| 663 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 664 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 665 | transport_kunmap_data_sg(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 666 | } |
| 667 | } |
| 668 | after_mode_sense: |
| 669 | |
Paolo Bonzini | 306c11b | 2012-09-07 17:30:32 +0200 | [diff] [blame] | 670 | if (sd->type != TYPE_TAPE || !cmd->data_length) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 671 | goto after_mode_select; |
| 672 | |
| 673 | /* |
| 674 | * Hack to correctly obtain the initiator requested blocksize for |
| 675 | * TYPE_TAPE. Since this value is dependent upon each tape media, |
| 676 | * struct scsi_device->sector_size will not contain the correct value |
| 677 | * by default, so we go ahead and set it so |
| 678 | * TRANSPORT(dev)->get_blockdev() returns the correct value to the |
| 679 | * storage engine. |
| 680 | */ |
| 681 | if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && |
| 682 | (status_byte(result) << 1) == SAM_STAT_GOOD) { |
| 683 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 684 | u16 bdl; |
| 685 | u32 blocksize; |
| 686 | |
| 687 | buf = sg_virt(&sg[0]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 688 | if (!buf) { |
| 689 | pr_err("Unable to get buf for scatterlist\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 690 | goto after_mode_select; |
| 691 | } |
| 692 | |
| 693 | if (cdb[0] == MODE_SELECT) |
| 694 | bdl = (buf[3]); |
| 695 | else |
| 696 | bdl = (buf[6] << 8) | (buf[7]); |
| 697 | |
| 698 | if (!bdl) |
| 699 | goto after_mode_select; |
| 700 | |
| 701 | if (cdb[0] == MODE_SELECT) |
| 702 | blocksize = (buf[9] << 16) | (buf[10] << 8) | |
| 703 | (buf[11]); |
| 704 | else |
| 705 | blocksize = (buf[13] << 16) | (buf[14] << 8) | |
| 706 | (buf[15]); |
| 707 | |
| 708 | sd->sector_size = blocksize; |
| 709 | } |
| 710 | after_mode_select: |
| 711 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 712 | if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { |
| 713 | memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); |
| 714 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; |
| 715 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 716 | } |
| 717 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 718 | enum { |
| 719 | Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, |
| 720 | Opt_scsi_lun_id, Opt_err |
| 721 | }; |
| 722 | |
| 723 | static match_table_t tokens = { |
| 724 | {Opt_scsi_host_id, "scsi_host_id=%d"}, |
| 725 | {Opt_scsi_channel_id, "scsi_channel_id=%d"}, |
| 726 | {Opt_scsi_target_id, "scsi_target_id=%d"}, |
| 727 | {Opt_scsi_lun_id, "scsi_lun_id=%d"}, |
| 728 | {Opt_err, NULL} |
| 729 | }; |
| 730 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 731 | static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, |
| 732 | const char *page, ssize_t count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 733 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 734 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
| 735 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 736 | char *orig, *ptr, *opts; |
| 737 | substring_t args[MAX_OPT_ARGS]; |
| 738 | int ret = 0, arg, token; |
| 739 | |
| 740 | opts = kstrdup(page, GFP_KERNEL); |
| 741 | if (!opts) |
| 742 | return -ENOMEM; |
| 743 | |
| 744 | orig = opts; |
| 745 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 746 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 747 | if (!*ptr) |
| 748 | continue; |
| 749 | |
| 750 | token = match_token(ptr, tokens, args); |
| 751 | switch (token) { |
| 752 | case Opt_scsi_host_id: |
| 753 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 754 | pr_err("PSCSI[%d]: Unable to accept" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 755 | " scsi_host_id while phv_mode ==" |
| 756 | " PHV_LLD_SCSI_HOST_NO\n", |
| 757 | phv->phv_host_id); |
| 758 | ret = -EINVAL; |
| 759 | goto out; |
| 760 | } |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 761 | ret = match_int(args, &arg); |
| 762 | if (ret) |
| 763 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 764 | pdv->pdv_host_id = arg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 765 | pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 766 | " %d\n", phv->phv_host_id, pdv->pdv_host_id); |
| 767 | pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; |
| 768 | break; |
| 769 | case Opt_scsi_channel_id: |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 770 | ret = match_int(args, &arg); |
| 771 | if (ret) |
| 772 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 773 | pdv->pdv_channel_id = arg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 774 | pr_debug("PSCSI[%d]: Referencing SCSI Channel" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 775 | " ID: %d\n", phv->phv_host_id, |
| 776 | pdv->pdv_channel_id); |
| 777 | pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; |
| 778 | break; |
| 779 | case Opt_scsi_target_id: |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 780 | ret = match_int(args, &arg); |
| 781 | if (ret) |
| 782 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 783 | pdv->pdv_target_id = arg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 784 | pr_debug("PSCSI[%d]: Referencing SCSI Target" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 785 | " ID: %d\n", phv->phv_host_id, |
| 786 | pdv->pdv_target_id); |
| 787 | pdv->pdv_flags |= PDF_HAS_TARGET_ID; |
| 788 | break; |
| 789 | case Opt_scsi_lun_id: |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 790 | ret = match_int(args, &arg); |
| 791 | if (ret) |
| 792 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 793 | pdv->pdv_lun_id = arg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 794 | pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 795 | " %d\n", phv->phv_host_id, pdv->pdv_lun_id); |
| 796 | pdv->pdv_flags |= PDF_HAS_LUN_ID; |
| 797 | break; |
| 798 | default: |
| 799 | break; |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | out: |
| 804 | kfree(orig); |
| 805 | return (!ret) ? count : ret; |
| 806 | } |
| 807 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 808 | static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 809 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 810 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
| 811 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 812 | struct scsi_device *sd = pdv->pdv_sd; |
| 813 | unsigned char host_id[16]; |
| 814 | ssize_t bl; |
| 815 | int i; |
| 816 | |
Stefan Hajnoczi | e6a8a41 | 2012-02-23 18:15:26 +0000 | [diff] [blame] | 817 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 818 | snprintf(host_id, 16, "%d", pdv->pdv_host_id); |
| 819 | else |
| 820 | snprintf(host_id, 16, "PHBA Mode"); |
| 821 | |
| 822 | bl = sprintf(b, "SCSI Device Bus Location:" |
| 823 | " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", |
| 824 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, |
| 825 | host_id); |
| 826 | |
| 827 | if (sd) { |
| 828 | bl += sprintf(b + bl, " "); |
| 829 | bl += sprintf(b + bl, "Vendor: "); |
| 830 | for (i = 0; i < 8; i++) { |
| 831 | if (ISPRINT(sd->vendor[i])) /* printable character? */ |
| 832 | bl += sprintf(b + bl, "%c", sd->vendor[i]); |
| 833 | else |
| 834 | bl += sprintf(b + bl, " "); |
| 835 | } |
| 836 | bl += sprintf(b + bl, " Model: "); |
| 837 | for (i = 0; i < 16; i++) { |
| 838 | if (ISPRINT(sd->model[i])) /* printable character ? */ |
| 839 | bl += sprintf(b + bl, "%c", sd->model[i]); |
| 840 | else |
| 841 | bl += sprintf(b + bl, " "); |
| 842 | } |
| 843 | bl += sprintf(b + bl, " Rev: "); |
| 844 | for (i = 0; i < 4; i++) { |
| 845 | if (ISPRINT(sd->rev[i])) /* printable character ? */ |
| 846 | bl += sprintf(b + bl, "%c", sd->rev[i]); |
| 847 | else |
| 848 | bl += sprintf(b + bl, " "); |
| 849 | } |
| 850 | bl += sprintf(b + bl, "\n"); |
| 851 | } |
| 852 | return bl; |
| 853 | } |
| 854 | |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 855 | static void pscsi_bi_endio(struct bio *bio) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 856 | { |
| 857 | bio_put(bio); |
| 858 | } |
| 859 | |
Asias He | 2dbe10a | 2013-02-27 13:29:30 +0800 | [diff] [blame] | 860 | static inline struct bio *pscsi_get_bio(int nr_vecs) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 861 | { |
| 862 | struct bio *bio; |
| 863 | /* |
| 864 | * Use bio_malloc() following the comment in for bio -> struct request |
| 865 | * in block/blk-core.c:blk_make_request() |
| 866 | */ |
Asias He | 2dbe10a | 2013-02-27 13:29:30 +0800 | [diff] [blame] | 867 | bio = bio_kmalloc(GFP_KERNEL, nr_vecs); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 868 | if (!bio) { |
| 869 | pr_err("PSCSI: bio_kmalloc() failed\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 870 | return NULL; |
| 871 | } |
| 872 | bio->bi_end_io = pscsi_bi_endio; |
| 873 | |
| 874 | return bio; |
| 875 | } |
| 876 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 877 | static sense_reason_t |
| 878 | pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 879 | struct request *req) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 880 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 881 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 882 | struct bio *bio = NULL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 883 | struct page *page; |
| 884 | struct scatterlist *sg; |
Christoph Hellwig | 7a83aa4 | 2012-04-23 11:35:31 -0400 | [diff] [blame] | 885 | u32 data_len = cmd->data_length, i, len, bytes, off; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 886 | int nr_pages = (cmd->data_length + sgl[0].offset + |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 887 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 888 | int nr_vecs = 0, rc; |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 889 | int rw = (cmd->data_direction == DMA_TO_DEVICE); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 890 | |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 891 | BUG_ON(!cmd->data_length); |
Christoph Hellwig | 02b1a74 | 2011-09-25 14:56:32 -0400 | [diff] [blame] | 892 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 893 | pr_debug("PSCSI: nr_pages: %d\n", nr_pages); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 894 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 895 | for_each_sg(sgl, sg, sgl_nents, i) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 896 | page = sg_page(sg); |
| 897 | off = sg->offset; |
| 898 | len = sg->length; |
| 899 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 900 | pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 901 | page, len, off); |
| 902 | |
Asias He | 8f27d48 | 2013-03-19 12:55:16 +0800 | [diff] [blame] | 903 | /* |
| 904 | * We only have one page of data in each sg element, |
| 905 | * we can not cross a page boundary. |
| 906 | */ |
| 907 | if (off + len > PAGE_SIZE) |
| 908 | goto fail; |
| 909 | |
| 910 | if (len > 0 && data_len > 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 911 | bytes = min_t(unsigned int, len, PAGE_SIZE - off); |
| 912 | bytes = min(bytes, data_len); |
| 913 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 914 | if (!bio) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 915 | nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); |
| 916 | nr_pages -= nr_vecs; |
| 917 | /* |
| 918 | * Calls bio_kmalloc() and sets bio->bi_end_io() |
| 919 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 920 | bio = pscsi_get_bio(nr_vecs); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 921 | if (!bio) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 922 | goto fail; |
| 923 | |
| 924 | if (rw) |
Mike Christie | e742fc3 | 2016-06-05 14:32:08 -0500 | [diff] [blame] | 925 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 926 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 927 | pr_debug("PSCSI: Allocated bio: %p," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 928 | " dir: %s nr_vecs: %d\n", bio, |
| 929 | (rw) ? "rw" : "r", nr_vecs); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 930 | } |
| 931 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 932 | pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 933 | " bio: %p page: %p len: %d off: %d\n", i, bio, |
| 934 | page, len, off); |
| 935 | |
| 936 | rc = bio_add_pc_page(pdv->pdv_sd->request_queue, |
| 937 | bio, page, bytes, off); |
| 938 | if (rc != bytes) |
| 939 | goto fail; |
| 940 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 941 | pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 942 | bio->bi_vcnt, nr_vecs); |
| 943 | |
| 944 | if (bio->bi_vcnt > nr_vecs) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 945 | pr_debug("PSCSI: Reached bio->bi_vcnt max:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 946 | " %d i: %d bio: %p, allocating another" |
| 947 | " bio\n", bio->bi_vcnt, i, bio); |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 948 | |
| 949 | rc = blk_rq_append_bio(req, bio); |
| 950 | if (rc) { |
| 951 | pr_err("pSCSI: failed to append bio\n"); |
| 952 | goto fail; |
| 953 | } |
| 954 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 955 | /* |
| 956 | * Clear the pointer so that another bio will |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 957 | * be allocated with pscsi_get_bio() above. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 958 | */ |
| 959 | bio = NULL; |
| 960 | } |
| 961 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 962 | data_len -= bytes; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 963 | } |
| 964 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 965 | |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 966 | if (bio) { |
| 967 | rc = blk_rq_append_bio(req, bio); |
| 968 | if (rc) { |
| 969 | pr_err("pSCSI: failed to append bio\n"); |
| 970 | goto fail; |
| 971 | } |
| 972 | } |
| 973 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 974 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 975 | fail: |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 976 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 977 | } |
| 978 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 979 | static sense_reason_t |
| 980 | pscsi_parse_cdb(struct se_cmd *cmd) |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 981 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 982 | if (cmd->se_cmd_flags & SCF_BIDI) |
| 983 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 984 | |
Andy Grover | 7bfea53b | 2015-05-19 14:44:40 -0700 | [diff] [blame] | 985 | return passthrough_parse_cdb(cmd, pscsi_execute_cmd); |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 986 | } |
| 987 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 988 | static sense_reason_t |
| 989 | pscsi_execute_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 990 | { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 991 | struct scatterlist *sgl = cmd->t_data_sg; |
| 992 | u32 sgl_nents = cmd->t_data_nents; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 993 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 994 | struct pscsi_plugin_task *pt; |
Christoph Hellwig | 02b1a74 | 2011-09-25 14:56:32 -0400 | [diff] [blame] | 995 | struct request *req; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 996 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 997 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 998 | /* |
| 999 | * Dynamically alloc cdb space, since it may be larger than |
| 1000 | * TCM_MAX_COMMAND_SIZE |
| 1001 | */ |
| 1002 | pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); |
| 1003 | if (!pt) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1004 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1005 | } |
| 1006 | cmd->priv = pt; |
| 1007 | |
Christoph Hellwig | ed3102c | 2012-04-23 11:35:29 -0400 | [diff] [blame] | 1008 | memcpy(pt->pscsi_cdb, cmd->t_task_cdb, |
| 1009 | scsi_command_size(cmd->t_task_cdb)); |
Christoph Hellwig | 485fd0d | 2011-10-12 11:09:12 -0400 | [diff] [blame] | 1010 | |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 1011 | req = blk_get_request(pdv->pdv_sd->request_queue, |
| 1012 | (cmd->data_direction == DMA_TO_DEVICE), |
| 1013 | GFP_KERNEL); |
| 1014 | if (IS_ERR(req)) { |
| 1015 | pr_err("PSCSI: blk_get_request() failed\n"); |
| 1016 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1017 | goto fail; |
| 1018 | } |
Jens Axboe | f27b087 | 2014-06-06 07:57:37 -0600 | [diff] [blame] | 1019 | |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 1020 | blk_rq_set_block_pc(req); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1021 | |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 1022 | if (sgl) { |
| 1023 | ret = pscsi_map_sg(cmd, sgl, sgl_nents, req); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1024 | if (ret) |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 1025 | goto fail_put_request; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1026 | } |
| 1027 | |
Christoph Hellwig | 02b1a74 | 2011-09-25 14:56:32 -0400 | [diff] [blame] | 1028 | req->end_io = pscsi_req_done; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1029 | req->end_io_data = cmd; |
Christoph Hellwig | 02b1a74 | 2011-09-25 14:56:32 -0400 | [diff] [blame] | 1030 | req->cmd_len = scsi_command_size(pt->pscsi_cdb); |
| 1031 | req->cmd = &pt->pscsi_cdb[0]; |
| 1032 | req->sense = &pt->pscsi_sense[0]; |
| 1033 | req->sense_len = 0; |
| 1034 | if (pdv->pdv_sd->type == TYPE_DISK) |
| 1035 | req->timeout = PS_TIMEOUT_DISK; |
| 1036 | else |
| 1037 | req->timeout = PS_TIMEOUT_OTHER; |
| 1038 | req->retries = PS_RETRY; |
| 1039 | |
| 1040 | blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1041 | (cmd->sam_task_attr == TCM_HEAD_TAG), |
Christoph Hellwig | 02b1a74 | 2011-09-25 14:56:32 -0400 | [diff] [blame] | 1042 | pscsi_req_done); |
| 1043 | |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1044 | return 0; |
Christoph Hellwig | 02b1a74 | 2011-09-25 14:56:32 -0400 | [diff] [blame] | 1045 | |
Christoph Hellwig | dd9cf04 | 2016-07-19 11:31:52 +0200 | [diff] [blame] | 1046 | fail_put_request: |
| 1047 | blk_put_request(req); |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1048 | fail: |
| 1049 | kfree(pt); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1050 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1051 | } |
| 1052 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1053 | /* pscsi_get_device_type(): |
| 1054 | * |
| 1055 | * |
| 1056 | */ |
| 1057 | static u32 pscsi_get_device_type(struct se_device *dev) |
| 1058 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1059 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1060 | struct scsi_device *sd = pdv->pdv_sd; |
| 1061 | |
Nicholas Bellinger | 215a8fe | 2015-02-27 03:54:13 -0800 | [diff] [blame] | 1062 | return (sd) ? sd->type : TYPE_NO_LUN; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | static sector_t pscsi_get_blocks(struct se_device *dev) |
| 1066 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1067 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1068 | |
| 1069 | if (pdv->pdv_bd && pdv->pdv_bd->bd_part) |
| 1070 | return pdv->pdv_bd->bd_part->nr_sects; |
| 1071 | |
| 1072 | dump_stack(); |
| 1073 | return 0; |
| 1074 | } |
| 1075 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1076 | static void pscsi_req_done(struct request *req, int uptodate) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1077 | { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1078 | struct se_cmd *cmd = req->end_io_data; |
| 1079 | struct pscsi_plugin_task *pt = cmd->priv; |
| 1080 | |
| 1081 | pt->pscsi_result = req->errors; |
| 1082 | pt->pscsi_resid = req->resid_len; |
| 1083 | |
| 1084 | cmd->scsi_status = status_byte(pt->pscsi_result) << 1; |
| 1085 | if (cmd->scsi_status) { |
| 1086 | pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" |
| 1087 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1088 | pt->pscsi_result); |
| 1089 | } |
| 1090 | |
| 1091 | switch (host_byte(pt->pscsi_result)) { |
| 1092 | case DID_OK: |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1093 | target_complete_cmd(cmd, cmd->scsi_status); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1094 | break; |
| 1095 | default: |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1096 | pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" |
| 1097 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1098 | pt->pscsi_result); |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1099 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1100 | break; |
| 1101 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1102 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1103 | __blk_put_request(req->q, req); |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 1104 | kfree(pt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1105 | } |
| 1106 | |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 1107 | static const struct target_backend_ops pscsi_ops = { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1108 | .name = "pscsi", |
| 1109 | .owner = THIS_MODULE, |
Andy Grover | a354170 | 2015-05-19 14:44:41 -0700 | [diff] [blame] | 1110 | .transport_flags = TRANSPORT_FLAG_PASSTHROUGH, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1111 | .attach_hba = pscsi_attach_hba, |
| 1112 | .detach_hba = pscsi_detach_hba, |
| 1113 | .pmode_enable_hba = pscsi_pmode_enable_hba, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1114 | .alloc_device = pscsi_alloc_device, |
| 1115 | .configure_device = pscsi_configure_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1116 | .free_device = pscsi_free_device, |
| 1117 | .transport_complete = pscsi_transport_complete, |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 1118 | .parse_cdb = pscsi_parse_cdb, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1119 | .set_configfs_dev_params = pscsi_set_configfs_dev_params, |
| 1120 | .show_configfs_dev_params = pscsi_show_configfs_dev_params, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1121 | .get_device_type = pscsi_get_device_type, |
| 1122 | .get_blocks = pscsi_get_blocks, |
Christoph Hellwig | 5873c4d | 2015-05-10 18:14:57 +0200 | [diff] [blame] | 1123 | .tb_dev_attrib_attrs = passthrough_attrib_attrs, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1124 | }; |
| 1125 | |
| 1126 | static int __init pscsi_module_init(void) |
| 1127 | { |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 1128 | return transport_backend_register(&pscsi_ops); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1129 | } |
| 1130 | |
Asias He | 63b91d5 | 2013-02-27 12:50:56 +0800 | [diff] [blame] | 1131 | static void __exit pscsi_module_exit(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1132 | { |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 1133 | target_backend_unregister(&pscsi_ops); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1134 | } |
| 1135 | |
| 1136 | MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); |
| 1137 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 1138 | MODULE_LICENSE("GPL"); |
| 1139 | |
| 1140 | module_init(pscsi_module_init); |
| 1141 | module_exit(pscsi_module_exit); |