1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * iSCSI transport class definitions 4 * 5 * Copyright (C) IBM Corporation, 2004 6 * Copyright (C) Mike Christie, 2004 - 2005 7 * Copyright (C) Dmitry Yusupov, 2004 - 2005 8 * Copyright (C) Alex Aizman, 2004 - 2005 9 */ 10 #include <linux/module.h> 11 #include <linux/mutex.h> 12 #include <linux/slab.h> 13 #include <linux/bsg-lib.h> 14 #include <linux/idr.h> 15 #include <net/tcp.h> 16 #include <scsi/scsi.h> 17 #include <scsi/scsi_host.h> 18 #include <scsi/scsi_device.h> 19 #include <scsi/scsi_transport.h> 20 #include <scsi/scsi_transport_iscsi.h> 21 #include <scsi/iscsi_if.h> 22 #include <scsi/scsi_cmnd.h> 23 #include <scsi/scsi_bsg_iscsi.h> 24 25 #define ISCSI_TRANSPORT_VERSION "2.0-870" 26 27 #define ISCSI_SEND_MAX_ALLOWED 10 28 29 #define CREATE_TRACE_POINTS 30 #include <trace/events/iscsi.h> 31 32 /* 33 * Export tracepoint symbols to be used by other modules. 34 */ 35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn); 36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh); 37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session); 38 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp); 39 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp); 40 41 static int dbg_session; 42 module_param_named(debug_session, dbg_session, int, 43 S_IRUGO | S_IWUSR); 44 MODULE_PARM_DESC(debug_session, 45 "Turn on debugging for sessions in scsi_transport_iscsi " 46 "module. Set to 1 to turn on, and zero to turn off. Default " 47 "is off."); 48 49 static int dbg_conn; 50 module_param_named(debug_conn, dbg_conn, int, 51 S_IRUGO | S_IWUSR); 52 MODULE_PARM_DESC(debug_conn, 53 "Turn on debugging for connections in scsi_transport_iscsi " 54 "module. Set to 1 to turn on, and zero to turn off. Default " 55 "is off."); 56 57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ 58 do { \ 59 if (dbg_session) \ 60 iscsi_cls_session_printk(KERN_INFO, _session, \ 61 "%s: " dbg_fmt, \ 62 __func__, ##arg); \ 63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \ 64 &(_session)->dev, \ 65 "%s " dbg_fmt, __func__, ##arg); \ 66 } while (0); 67 68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ 69 do { \ 70 if (dbg_conn) \ 71 iscsi_cls_conn_printk(KERN_INFO, _conn, \ 72 "%s: " dbg_fmt, \ 73 __func__, ##arg); \ 74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \ 75 &(_conn)->dev, \ 76 "%s " dbg_fmt, __func__, ##arg); \ 77 } while (0); 78 79 struct iscsi_internal { 80 struct scsi_transport_template t; 81 struct iscsi_transport *iscsi_transport; 82 struct list_head list; 83 struct device dev; 84 85 struct transport_container conn_cont; 86 struct transport_container session_cont; 87 }; 88 89 static DEFINE_IDR(iscsi_ep_idr); 90 static DEFINE_MUTEX(iscsi_ep_idr_mutex); 91 92 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ 93 94 static struct workqueue_struct *iscsi_conn_cleanup_workq; 95 96 static DEFINE_IDA(iscsi_sess_ida); 97 /* 98 * list of registered transports and lock that must 99 * be held while accessing list. The iscsi_transport_lock must 100 * be acquired after the rx_queue_mutex. 101 */ 102 static LIST_HEAD(iscsi_transports); 103 static DEFINE_SPINLOCK(iscsi_transport_lock); 104 105 #define to_iscsi_internal(tmpl) \ 106 container_of(tmpl, struct iscsi_internal, t) 107 108 #define dev_to_iscsi_internal(_dev) \ 109 container_of(_dev, struct iscsi_internal, dev) 110 111 static void iscsi_transport_release(struct device *dev) 112 { 113 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 114 kfree(priv); 115 } 116 117 /* 118 * iscsi_transport_class represents the iscsi_transports that are 119 * registered. 120 */ 121 static struct class iscsi_transport_class = { 122 .name = "iscsi_transport", 123 .dev_release = iscsi_transport_release, 124 }; 125 126 static ssize_t 127 show_transport_handle(struct device *dev, struct device_attribute *attr, 128 char *buf) 129 { 130 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 131 132 if (!capable(CAP_SYS_ADMIN)) 133 return -EACCES; 134 return sysfs_emit(buf, "%llu\n", 135 (unsigned long long)iscsi_handle(priv->iscsi_transport)); 136 } 137 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); 138 139 #define show_transport_attr(name, format) \ 140 static ssize_t \ 141 show_transport_##name(struct device *dev, \ 142 struct device_attribute *attr,char *buf) \ 143 { \ 144 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ 145 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\ 146 } \ 147 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); 148 149 show_transport_attr(caps, "0x%x"); 150 151 static struct attribute *iscsi_transport_attrs[] = { 152 &dev_attr_handle.attr, 153 &dev_attr_caps.attr, 154 NULL, 155 }; 156 157 static struct attribute_group iscsi_transport_group = { 158 .attrs = iscsi_transport_attrs, 159 }; 160 161 /* 162 * iSCSI endpoint attrs 163 */ 164 #define iscsi_dev_to_endpoint(_dev) \ 165 container_of(_dev, struct iscsi_endpoint, dev) 166 167 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ 168 struct device_attribute dev_attr_##_prefix##_##_name = \ 169 __ATTR(_name,_mode,_show,_store) 170 171 static void iscsi_endpoint_release(struct device *dev) 172 { 173 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 174 175 mutex_lock(&iscsi_ep_idr_mutex); 176 idr_remove(&iscsi_ep_idr, ep->id); 177 mutex_unlock(&iscsi_ep_idr_mutex); 178 179 kfree(ep); 180 } 181 182 static struct class iscsi_endpoint_class = { 183 .name = "iscsi_endpoint", 184 .dev_release = iscsi_endpoint_release, 185 }; 186 187 static ssize_t 188 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) 189 { 190 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 191 return sysfs_emit(buf, "%d\n", ep->id); 192 } 193 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); 194 195 static struct attribute *iscsi_endpoint_attrs[] = { 196 &dev_attr_ep_handle.attr, 197 NULL, 198 }; 199 200 static struct attribute_group iscsi_endpoint_group = { 201 .attrs = iscsi_endpoint_attrs, 202 }; 203 204 struct iscsi_endpoint * 205 iscsi_create_endpoint(int dd_size) 206 { 207 struct iscsi_endpoint *ep; 208 int err, id; 209 210 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); 211 if (!ep) 212 return NULL; 213 214 mutex_lock(&iscsi_ep_idr_mutex); 215 216 /* 217 * First endpoint id should be 1 to comply with user space 218 * applications (iscsid). 219 */ 220 id = idr_alloc(&iscsi_ep_idr, ep, 1, -1, GFP_NOIO); 221 if (id < 0) { 222 mutex_unlock(&iscsi_ep_idr_mutex); 223 printk(KERN_ERR "Could not allocate endpoint ID. Error %d.\n", 224 id); 225 goto free_ep; 226 } 227 mutex_unlock(&iscsi_ep_idr_mutex); 228 229 ep->id = id; 230 ep->dev.class = &iscsi_endpoint_class; 231 dev_set_name(&ep->dev, "ep-%d", id); 232 err = device_register(&ep->dev); 233 if (err) 234 goto put_dev; 235 236 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); 237 if (err) 238 goto unregister_dev; 239 240 if (dd_size) 241 ep->dd_data = &ep[1]; 242 return ep; 243 244 unregister_dev: 245 device_unregister(&ep->dev); 246 return NULL; 247 248 put_dev: 249 mutex_lock(&iscsi_ep_idr_mutex); 250 idr_remove(&iscsi_ep_idr, id); 251 mutex_unlock(&iscsi_ep_idr_mutex); 252 put_device(&ep->dev); 253 return NULL; 254 free_ep: 255 kfree(ep); 256 return NULL; 257 } 258 EXPORT_SYMBOL_GPL(iscsi_create_endpoint); 259 260 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) 261 { 262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); 263 device_unregister(&ep->dev); 264 } 265 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); 266 267 void iscsi_put_endpoint(struct iscsi_endpoint *ep) 268 { 269 put_device(&ep->dev); 270 } 271 EXPORT_SYMBOL_GPL(iscsi_put_endpoint); 272 273 /** 274 * iscsi_lookup_endpoint - get ep from handle 275 * @handle: endpoint handle 276 * 277 * Caller must do a iscsi_put_endpoint. 278 */ 279 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 280 { 281 struct iscsi_endpoint *ep; 282 283 mutex_lock(&iscsi_ep_idr_mutex); 284 ep = idr_find(&iscsi_ep_idr, handle); 285 if (!ep) 286 goto unlock; 287 288 get_device(&ep->dev); 289 unlock: 290 mutex_unlock(&iscsi_ep_idr_mutex); 291 return ep; 292 } 293 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 294 295 /* 296 * Interface to display network param to sysfs 297 */ 298 299 static void iscsi_iface_release(struct device *dev) 300 { 301 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 302 struct device *parent = iface->dev.parent; 303 304 kfree(iface); 305 put_device(parent); 306 } 307 308 309 static struct class iscsi_iface_class = { 310 .name = "iscsi_iface", 311 .dev_release = iscsi_iface_release, 312 }; 313 314 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 315 struct device_attribute dev_attr_##_prefix##_##_name = \ 316 __ATTR(_name, _mode, _show, _store) 317 318 /* iface attrs show */ 319 #define iscsi_iface_attr_show(type, name, param_type, param) \ 320 static ssize_t \ 321 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 322 char *buf) \ 323 { \ 324 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 325 struct iscsi_transport *t = iface->transport; \ 326 return t->get_iface_param(iface, param_type, param, buf); \ 327 } \ 328 329 #define iscsi_iface_net_attr(type, name, param) \ 330 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 331 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 332 333 #define iscsi_iface_attr(type, name, param) \ 334 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 335 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 336 337 /* generic read only ipv4 attribute */ 338 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 339 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 340 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 341 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 342 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 343 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 344 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 345 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 346 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 347 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 348 iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 349 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 350 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 351 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 352 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 353 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 354 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 355 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 356 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 357 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 358 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 359 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 360 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 361 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 362 iscsi_iface_net_attr(ipv4_iface, fragment_disable, 363 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 364 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 365 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 366 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 367 368 /* generic read only ipv6 attribute */ 369 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 370 iscsi_iface_net_attr(ipv6_iface, link_local_addr, 371 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 372 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 373 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 374 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 375 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 376 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 377 iscsi_iface_net_attr(ipv6_iface, link_local_state, 378 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 379 iscsi_iface_net_attr(ipv6_iface, router_state, 380 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 381 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 382 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 383 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 384 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 385 iscsi_iface_net_attr(ipv6_iface, traffic_class, 386 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 387 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 388 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 389 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 390 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 391 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 392 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 393 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 394 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 395 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 396 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 397 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 398 399 /* common read only iface attribute */ 400 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 401 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 402 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 403 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 404 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 405 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 406 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 407 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 408 iscsi_iface_net_attr(iface, tcp_nagle_disable, 409 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 410 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 411 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 412 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 413 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 414 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 415 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 416 417 /* common iscsi specific settings attributes */ 418 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 419 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 420 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 421 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 422 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 423 iscsi_iface_attr(iface, data_seq_in_order, 424 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 425 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 426 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 427 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 428 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 429 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 430 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 431 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 432 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 433 iscsi_iface_attr(iface, discovery_auth_optional, 434 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 435 iscsi_iface_attr(iface, discovery_logout, 436 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 437 iscsi_iface_attr(iface, strict_login_comp_en, 438 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 439 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 440 441 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 442 struct attribute *attr, int i) 443 { 444 struct device *dev = container_of(kobj, struct device, kobj); 445 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 446 struct iscsi_transport *t = iface->transport; 447 int param = -1; 448 449 if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 450 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 451 else if (attr == &dev_attr_iface_header_digest.attr) 452 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 453 else if (attr == &dev_attr_iface_data_digest.attr) 454 param = ISCSI_IFACE_PARAM_DATADGST_EN; 455 else if (attr == &dev_attr_iface_immediate_data.attr) 456 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 457 else if (attr == &dev_attr_iface_initial_r2t.attr) 458 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 459 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 460 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 461 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 462 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 463 else if (attr == &dev_attr_iface_erl.attr) 464 param = ISCSI_IFACE_PARAM_ERL; 465 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 466 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 467 else if (attr == &dev_attr_iface_first_burst_len.attr) 468 param = ISCSI_IFACE_PARAM_FIRST_BURST; 469 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 470 param = ISCSI_IFACE_PARAM_MAX_R2T; 471 else if (attr == &dev_attr_iface_max_burst_len.attr) 472 param = ISCSI_IFACE_PARAM_MAX_BURST; 473 else if (attr == &dev_attr_iface_chap_auth.attr) 474 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 475 else if (attr == &dev_attr_iface_bidi_chap.attr) 476 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 477 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 478 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 479 else if (attr == &dev_attr_iface_discovery_logout.attr) 480 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 481 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 482 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 483 else if (attr == &dev_attr_iface_initiator_name.attr) 484 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 485 486 if (param != -1) 487 return t->attr_is_visible(ISCSI_IFACE_PARAM, param); 488 489 if (attr == &dev_attr_iface_enabled.attr) 490 param = ISCSI_NET_PARAM_IFACE_ENABLE; 491 else if (attr == &dev_attr_iface_vlan_id.attr) 492 param = ISCSI_NET_PARAM_VLAN_ID; 493 else if (attr == &dev_attr_iface_vlan_priority.attr) 494 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 495 else if (attr == &dev_attr_iface_vlan_enabled.attr) 496 param = ISCSI_NET_PARAM_VLAN_ENABLED; 497 else if (attr == &dev_attr_iface_mtu.attr) 498 param = ISCSI_NET_PARAM_MTU; 499 else if (attr == &dev_attr_iface_port.attr) 500 param = ISCSI_NET_PARAM_PORT; 501 else if (attr == &dev_attr_iface_ipaddress_state.attr) 502 param = ISCSI_NET_PARAM_IPADDR_STATE; 503 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 504 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 505 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 506 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 507 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 508 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 509 else if (attr == &dev_attr_iface_tcp_wsf.attr) 510 param = ISCSI_NET_PARAM_TCP_WSF; 511 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 512 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 513 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 514 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 515 else if (attr == &dev_attr_iface_cache_id.attr) 516 param = ISCSI_NET_PARAM_CACHE_ID; 517 else if (attr == &dev_attr_iface_redirect_en.attr) 518 param = ISCSI_NET_PARAM_REDIRECT_EN; 519 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 520 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 521 param = ISCSI_NET_PARAM_IPV4_ADDR; 522 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 523 param = ISCSI_NET_PARAM_IPV4_GW; 524 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 525 param = ISCSI_NET_PARAM_IPV4_SUBNET; 526 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 527 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 528 else if (attr == 529 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 530 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 531 else if (attr == 532 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 533 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 534 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 535 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 536 else if (attr == &dev_attr_ipv4_iface_tos.attr) 537 param = ISCSI_NET_PARAM_IPV4_TOS; 538 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 539 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 540 else if (attr == 541 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 542 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 543 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 544 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 545 else if (attr == 546 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 547 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 548 else if (attr == 549 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 550 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 551 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 552 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 553 else if (attr == 554 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 555 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 556 else if (attr == 557 &dev_attr_ipv4_iface_fragment_disable.attr) 558 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 559 else if (attr == 560 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 561 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 562 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 563 param = ISCSI_NET_PARAM_IPV4_TTL; 564 else 565 return 0; 566 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 567 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 568 param = ISCSI_NET_PARAM_IPV6_ADDR; 569 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 570 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 571 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 572 param = ISCSI_NET_PARAM_IPV6_ROUTER; 573 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 574 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 575 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 576 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 577 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 578 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 579 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 580 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 581 else if (attr == 582 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 583 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 584 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 585 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 586 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 587 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 588 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 589 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 590 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 591 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 592 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 593 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 594 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 595 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 596 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 597 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 598 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 599 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 600 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 601 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 602 else 603 return 0; 604 } else { 605 WARN_ONCE(1, "Invalid iface attr"); 606 return 0; 607 } 608 609 return t->attr_is_visible(ISCSI_NET_PARAM, param); 610 } 611 612 static struct attribute *iscsi_iface_attrs[] = { 613 &dev_attr_iface_enabled.attr, 614 &dev_attr_iface_vlan_id.attr, 615 &dev_attr_iface_vlan_priority.attr, 616 &dev_attr_iface_vlan_enabled.attr, 617 &dev_attr_ipv4_iface_ipaddress.attr, 618 &dev_attr_ipv4_iface_gateway.attr, 619 &dev_attr_ipv4_iface_subnet.attr, 620 &dev_attr_ipv4_iface_bootproto.attr, 621 &dev_attr_ipv6_iface_ipaddress.attr, 622 &dev_attr_ipv6_iface_link_local_addr.attr, 623 &dev_attr_ipv6_iface_router_addr.attr, 624 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 625 &dev_attr_ipv6_iface_link_local_autocfg.attr, 626 &dev_attr_iface_mtu.attr, 627 &dev_attr_iface_port.attr, 628 &dev_attr_iface_ipaddress_state.attr, 629 &dev_attr_iface_delayed_ack_en.attr, 630 &dev_attr_iface_tcp_nagle_disable.attr, 631 &dev_attr_iface_tcp_wsf_disable.attr, 632 &dev_attr_iface_tcp_wsf.attr, 633 &dev_attr_iface_tcp_timer_scale.attr, 634 &dev_attr_iface_tcp_timestamp_en.attr, 635 &dev_attr_iface_cache_id.attr, 636 &dev_attr_iface_redirect_en.attr, 637 &dev_attr_iface_def_taskmgmt_tmo.attr, 638 &dev_attr_iface_header_digest.attr, 639 &dev_attr_iface_data_digest.attr, 640 &dev_attr_iface_immediate_data.attr, 641 &dev_attr_iface_initial_r2t.attr, 642 &dev_attr_iface_data_seq_in_order.attr, 643 &dev_attr_iface_data_pdu_in_order.attr, 644 &dev_attr_iface_erl.attr, 645 &dev_attr_iface_max_recv_dlength.attr, 646 &dev_attr_iface_first_burst_len.attr, 647 &dev_attr_iface_max_outstanding_r2t.attr, 648 &dev_attr_iface_max_burst_len.attr, 649 &dev_attr_iface_chap_auth.attr, 650 &dev_attr_iface_bidi_chap.attr, 651 &dev_attr_iface_discovery_auth_optional.attr, 652 &dev_attr_iface_discovery_logout.attr, 653 &dev_attr_iface_strict_login_comp_en.attr, 654 &dev_attr_iface_initiator_name.attr, 655 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 656 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 657 &dev_attr_ipv4_iface_tos_en.attr, 658 &dev_attr_ipv4_iface_tos.attr, 659 &dev_attr_ipv4_iface_grat_arp_en.attr, 660 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 661 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 662 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 663 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 664 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 665 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 666 &dev_attr_ipv4_iface_fragment_disable.attr, 667 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 668 &dev_attr_ipv4_iface_ttl.attr, 669 &dev_attr_ipv6_iface_link_local_state.attr, 670 &dev_attr_ipv6_iface_router_state.attr, 671 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 672 &dev_attr_ipv6_iface_mld_en.attr, 673 &dev_attr_ipv6_iface_flow_label.attr, 674 &dev_attr_ipv6_iface_traffic_class.attr, 675 &dev_attr_ipv6_iface_hop_limit.attr, 676 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 677 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 678 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 679 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 680 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 681 NULL, 682 }; 683 684 static struct attribute_group iscsi_iface_group = { 685 .attrs = iscsi_iface_attrs, 686 .is_visible = iscsi_iface_attr_is_visible, 687 }; 688 689 /* convert iscsi_ipaddress_state values to ascii string name */ 690 static const struct { 691 enum iscsi_ipaddress_state value; 692 char *name; 693 } iscsi_ipaddress_state_names[] = { 694 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 695 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 696 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 697 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 698 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 699 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 700 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 701 }; 702 703 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 704 { 705 int i; 706 char *state = NULL; 707 708 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 709 if (iscsi_ipaddress_state_names[i].value == port_state) { 710 state = iscsi_ipaddress_state_names[i].name; 711 break; 712 } 713 } 714 return state; 715 } 716 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 717 718 /* convert iscsi_router_state values to ascii string name */ 719 static const struct { 720 enum iscsi_router_state value; 721 char *name; 722 } iscsi_router_state_names[] = { 723 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 724 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 725 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 726 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 727 }; 728 729 char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 730 { 731 int i; 732 char *state = NULL; 733 734 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 735 if (iscsi_router_state_names[i].value == router_state) { 736 state = iscsi_router_state_names[i].name; 737 break; 738 } 739 } 740 return state; 741 } 742 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 743 744 struct iscsi_iface * 745 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 746 uint32_t iface_type, uint32_t iface_num, int dd_size) 747 { 748 struct iscsi_iface *iface; 749 int err; 750 751 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 752 if (!iface) 753 return NULL; 754 755 iface->transport = transport; 756 iface->iface_type = iface_type; 757 iface->iface_num = iface_num; 758 iface->dev.release = iscsi_iface_release; 759 iface->dev.class = &iscsi_iface_class; 760 /* parent reference released in iscsi_iface_release */ 761 iface->dev.parent = get_device(&shost->shost_gendev); 762 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 763 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 764 iface_num); 765 else 766 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 767 iface_num); 768 769 err = device_register(&iface->dev); 770 if (err) 771 goto put_dev; 772 773 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 774 if (err) 775 goto unreg_iface; 776 777 if (dd_size) 778 iface->dd_data = &iface[1]; 779 return iface; 780 781 unreg_iface: 782 device_unregister(&iface->dev); 783 return NULL; 784 785 put_dev: 786 put_device(&iface->dev); 787 return NULL; 788 } 789 EXPORT_SYMBOL_GPL(iscsi_create_iface); 790 791 void iscsi_destroy_iface(struct iscsi_iface *iface) 792 { 793 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 794 device_unregister(&iface->dev); 795 } 796 EXPORT_SYMBOL_GPL(iscsi_destroy_iface); 797 798 /* 799 * Interface to display flash node params to sysfs 800 */ 801 802 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ 803 struct device_attribute dev_attr_##_prefix##_##_name = \ 804 __ATTR(_name, _mode, _show, _store) 805 806 /* flash node session attrs show */ 807 #define iscsi_flashnode_sess_attr_show(type, name, param) \ 808 static ssize_t \ 809 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 810 char *buf) \ 811 { \ 812 struct iscsi_bus_flash_session *fnode_sess = \ 813 iscsi_dev_to_flash_session(dev);\ 814 struct iscsi_transport *t = fnode_sess->transport; \ 815 return t->get_flashnode_param(fnode_sess, param, buf); \ 816 } \ 817 818 819 #define iscsi_flashnode_sess_attr(type, name, param) \ 820 iscsi_flashnode_sess_attr_show(type, name, param) \ 821 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 822 show_##type##_##name, NULL); 823 824 /* Flash node session attributes */ 825 826 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 827 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 828 iscsi_flashnode_sess_attr(fnode, discovery_session, 829 ISCSI_FLASHNODE_DISCOVERY_SESS); 830 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 831 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 832 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 833 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 834 iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 835 ISCSI_FLASHNODE_DATASEQ_INORDER); 836 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 837 ISCSI_FLASHNODE_PDU_INORDER); 838 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 839 iscsi_flashnode_sess_attr(fnode, discovery_logout, 840 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 841 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 842 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 843 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 844 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 845 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 846 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 847 iscsi_flashnode_sess_attr(fnode, def_time2retain, 848 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 849 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 850 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 851 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 852 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 853 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 854 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 855 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 856 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 857 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 858 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 859 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 860 iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 861 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 862 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 863 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 864 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 865 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 866 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 867 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 868 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 869 870 static struct attribute *iscsi_flashnode_sess_attrs[] = { 871 &dev_attr_fnode_auto_snd_tgt_disable.attr, 872 &dev_attr_fnode_discovery_session.attr, 873 &dev_attr_fnode_portal_type.attr, 874 &dev_attr_fnode_entry_enable.attr, 875 &dev_attr_fnode_immediate_data.attr, 876 &dev_attr_fnode_initial_r2t.attr, 877 &dev_attr_fnode_data_seq_in_order.attr, 878 &dev_attr_fnode_data_pdu_in_order.attr, 879 &dev_attr_fnode_chap_auth.attr, 880 &dev_attr_fnode_discovery_logout.attr, 881 &dev_attr_fnode_bidi_chap.attr, 882 &dev_attr_fnode_discovery_auth_optional.attr, 883 &dev_attr_fnode_erl.attr, 884 &dev_attr_fnode_first_burst_len.attr, 885 &dev_attr_fnode_def_time2wait.attr, 886 &dev_attr_fnode_def_time2retain.attr, 887 &dev_attr_fnode_max_outstanding_r2t.attr, 888 &dev_attr_fnode_isid.attr, 889 &dev_attr_fnode_tsid.attr, 890 &dev_attr_fnode_max_burst_len.attr, 891 &dev_attr_fnode_def_taskmgmt_tmo.attr, 892 &dev_attr_fnode_targetalias.attr, 893 &dev_attr_fnode_targetname.attr, 894 &dev_attr_fnode_tpgt.attr, 895 &dev_attr_fnode_discovery_parent_idx.attr, 896 &dev_attr_fnode_discovery_parent_type.attr, 897 &dev_attr_fnode_chap_in_idx.attr, 898 &dev_attr_fnode_chap_out_idx.attr, 899 &dev_attr_fnode_username.attr, 900 &dev_attr_fnode_username_in.attr, 901 &dev_attr_fnode_password.attr, 902 &dev_attr_fnode_password_in.attr, 903 &dev_attr_fnode_is_boot_target.attr, 904 NULL, 905 }; 906 907 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, 908 struct attribute *attr, 909 int i) 910 { 911 struct device *dev = container_of(kobj, struct device, kobj); 912 struct iscsi_bus_flash_session *fnode_sess = 913 iscsi_dev_to_flash_session(dev); 914 struct iscsi_transport *t = fnode_sess->transport; 915 int param; 916 917 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { 918 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; 919 } else if (attr == &dev_attr_fnode_discovery_session.attr) { 920 param = ISCSI_FLASHNODE_DISCOVERY_SESS; 921 } else if (attr == &dev_attr_fnode_portal_type.attr) { 922 param = ISCSI_FLASHNODE_PORTAL_TYPE; 923 } else if (attr == &dev_attr_fnode_entry_enable.attr) { 924 param = ISCSI_FLASHNODE_ENTRY_EN; 925 } else if (attr == &dev_attr_fnode_immediate_data.attr) { 926 param = ISCSI_FLASHNODE_IMM_DATA_EN; 927 } else if (attr == &dev_attr_fnode_initial_r2t.attr) { 928 param = ISCSI_FLASHNODE_INITIAL_R2T_EN; 929 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { 930 param = ISCSI_FLASHNODE_DATASEQ_INORDER; 931 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { 932 param = ISCSI_FLASHNODE_PDU_INORDER; 933 } else if (attr == &dev_attr_fnode_chap_auth.attr) { 934 param = ISCSI_FLASHNODE_CHAP_AUTH_EN; 935 } else if (attr == &dev_attr_fnode_discovery_logout.attr) { 936 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; 937 } else if (attr == &dev_attr_fnode_bidi_chap.attr) { 938 param = ISCSI_FLASHNODE_BIDI_CHAP_EN; 939 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { 940 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; 941 } else if (attr == &dev_attr_fnode_erl.attr) { 942 param = ISCSI_FLASHNODE_ERL; 943 } else if (attr == &dev_attr_fnode_first_burst_len.attr) { 944 param = ISCSI_FLASHNODE_FIRST_BURST; 945 } else if (attr == &dev_attr_fnode_def_time2wait.attr) { 946 param = ISCSI_FLASHNODE_DEF_TIME2WAIT; 947 } else if (attr == &dev_attr_fnode_def_time2retain.attr) { 948 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; 949 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { 950 param = ISCSI_FLASHNODE_MAX_R2T; 951 } else if (attr == &dev_attr_fnode_isid.attr) { 952 param = ISCSI_FLASHNODE_ISID; 953 } else if (attr == &dev_attr_fnode_tsid.attr) { 954 param = ISCSI_FLASHNODE_TSID; 955 } else if (attr == &dev_attr_fnode_max_burst_len.attr) { 956 param = ISCSI_FLASHNODE_MAX_BURST; 957 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { 958 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; 959 } else if (attr == &dev_attr_fnode_targetalias.attr) { 960 param = ISCSI_FLASHNODE_ALIAS; 961 } else if (attr == &dev_attr_fnode_targetname.attr) { 962 param = ISCSI_FLASHNODE_NAME; 963 } else if (attr == &dev_attr_fnode_tpgt.attr) { 964 param = ISCSI_FLASHNODE_TPGT; 965 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { 966 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; 967 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { 968 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; 969 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { 970 param = ISCSI_FLASHNODE_CHAP_IN_IDX; 971 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { 972 param = ISCSI_FLASHNODE_CHAP_OUT_IDX; 973 } else if (attr == &dev_attr_fnode_username.attr) { 974 param = ISCSI_FLASHNODE_USERNAME; 975 } else if (attr == &dev_attr_fnode_username_in.attr) { 976 param = ISCSI_FLASHNODE_USERNAME_IN; 977 } else if (attr == &dev_attr_fnode_password.attr) { 978 param = ISCSI_FLASHNODE_PASSWORD; 979 } else if (attr == &dev_attr_fnode_password_in.attr) { 980 param = ISCSI_FLASHNODE_PASSWORD_IN; 981 } else if (attr == &dev_attr_fnode_is_boot_target.attr) { 982 param = ISCSI_FLASHNODE_IS_BOOT_TGT; 983 } else { 984 WARN_ONCE(1, "Invalid flashnode session attr"); 985 return 0; 986 } 987 988 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 989 } 990 991 static struct attribute_group iscsi_flashnode_sess_attr_group = { 992 .attrs = iscsi_flashnode_sess_attrs, 993 .is_visible = iscsi_flashnode_sess_attr_is_visible, 994 }; 995 996 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 997 &iscsi_flashnode_sess_attr_group, 998 NULL, 999 }; 1000 1001 static void iscsi_flashnode_sess_release(struct device *dev) 1002 { 1003 struct iscsi_bus_flash_session *fnode_sess = 1004 iscsi_dev_to_flash_session(dev); 1005 1006 kfree(fnode_sess->targetname); 1007 kfree(fnode_sess->targetalias); 1008 kfree(fnode_sess->portal_type); 1009 kfree(fnode_sess); 1010 } 1011 1012 static const struct device_type iscsi_flashnode_sess_dev_type = { 1013 .name = "iscsi_flashnode_sess_dev_type", 1014 .groups = iscsi_flashnode_sess_attr_groups, 1015 .release = iscsi_flashnode_sess_release, 1016 }; 1017 1018 /* flash node connection attrs show */ 1019 #define iscsi_flashnode_conn_attr_show(type, name, param) \ 1020 static ssize_t \ 1021 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 1022 char *buf) \ 1023 { \ 1024 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ 1025 struct iscsi_bus_flash_session *fnode_sess = \ 1026 iscsi_flash_conn_to_flash_session(fnode_conn);\ 1027 struct iscsi_transport *t = fnode_conn->transport; \ 1028 return t->get_flashnode_param(fnode_sess, param, buf); \ 1029 } \ 1030 1031 1032 #define iscsi_flashnode_conn_attr(type, name, param) \ 1033 iscsi_flashnode_conn_attr_show(type, name, param) \ 1034 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1035 show_##type##_##name, NULL); 1036 1037 /* Flash node connection attributes */ 1038 1039 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1040 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1041 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1042 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1043 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1044 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1045 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1046 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1047 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1048 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1049 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1050 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1051 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1052 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1053 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1054 iscsi_flashnode_conn_attr(fnode, fragment_disable, 1055 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1056 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1057 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1058 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1059 iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1060 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1061 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1062 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1063 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1064 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1065 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1066 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1067 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1068 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1069 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1070 iscsi_flashnode_conn_attr(fnode, max_segment_size, 1071 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1072 iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1073 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1074 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1075 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1076 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1077 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1078 1079 static struct attribute *iscsi_flashnode_conn_attrs[] = { 1080 &dev_attr_fnode_is_fw_assigned_ipv6.attr, 1081 &dev_attr_fnode_header_digest.attr, 1082 &dev_attr_fnode_data_digest.attr, 1083 &dev_attr_fnode_snack_req.attr, 1084 &dev_attr_fnode_tcp_timestamp_stat.attr, 1085 &dev_attr_fnode_tcp_nagle_disable.attr, 1086 &dev_attr_fnode_tcp_wsf_disable.attr, 1087 &dev_attr_fnode_tcp_timer_scale.attr, 1088 &dev_attr_fnode_tcp_timestamp_enable.attr, 1089 &dev_attr_fnode_fragment_disable.attr, 1090 &dev_attr_fnode_max_recv_dlength.attr, 1091 &dev_attr_fnode_max_xmit_dlength.attr, 1092 &dev_attr_fnode_keepalive_tmo.attr, 1093 &dev_attr_fnode_port.attr, 1094 &dev_attr_fnode_ipaddress.attr, 1095 &dev_attr_fnode_redirect_ipaddr.attr, 1096 &dev_attr_fnode_max_segment_size.attr, 1097 &dev_attr_fnode_local_port.attr, 1098 &dev_attr_fnode_ipv4_tos.attr, 1099 &dev_attr_fnode_ipv6_traffic_class.attr, 1100 &dev_attr_fnode_ipv6_flow_label.attr, 1101 &dev_attr_fnode_link_local_ipv6.attr, 1102 &dev_attr_fnode_tcp_xmit_wsf.attr, 1103 &dev_attr_fnode_tcp_recv_wsf.attr, 1104 &dev_attr_fnode_statsn.attr, 1105 &dev_attr_fnode_exp_statsn.attr, 1106 NULL, 1107 }; 1108 1109 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, 1110 struct attribute *attr, 1111 int i) 1112 { 1113 struct device *dev = container_of(kobj, struct device, kobj); 1114 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1115 struct iscsi_transport *t = fnode_conn->transport; 1116 int param; 1117 1118 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { 1119 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; 1120 } else if (attr == &dev_attr_fnode_header_digest.attr) { 1121 param = ISCSI_FLASHNODE_HDR_DGST_EN; 1122 } else if (attr == &dev_attr_fnode_data_digest.attr) { 1123 param = ISCSI_FLASHNODE_DATA_DGST_EN; 1124 } else if (attr == &dev_attr_fnode_snack_req.attr) { 1125 param = ISCSI_FLASHNODE_SNACK_REQ_EN; 1126 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { 1127 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; 1128 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { 1129 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; 1130 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { 1131 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; 1132 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { 1133 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; 1134 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { 1135 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; 1136 } else if (attr == &dev_attr_fnode_fragment_disable.attr) { 1137 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; 1138 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { 1139 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; 1140 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { 1141 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; 1142 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { 1143 param = ISCSI_FLASHNODE_KEEPALIVE_TMO; 1144 } else if (attr == &dev_attr_fnode_port.attr) { 1145 param = ISCSI_FLASHNODE_PORT; 1146 } else if (attr == &dev_attr_fnode_ipaddress.attr) { 1147 param = ISCSI_FLASHNODE_IPADDR; 1148 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { 1149 param = ISCSI_FLASHNODE_REDIRECT_IPADDR; 1150 } else if (attr == &dev_attr_fnode_max_segment_size.attr) { 1151 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; 1152 } else if (attr == &dev_attr_fnode_local_port.attr) { 1153 param = ISCSI_FLASHNODE_LOCAL_PORT; 1154 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { 1155 param = ISCSI_FLASHNODE_IPV4_TOS; 1156 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { 1157 param = ISCSI_FLASHNODE_IPV6_TC; 1158 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { 1159 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; 1160 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { 1161 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; 1162 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { 1163 param = ISCSI_FLASHNODE_TCP_XMIT_WSF; 1164 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { 1165 param = ISCSI_FLASHNODE_TCP_RECV_WSF; 1166 } else if (attr == &dev_attr_fnode_statsn.attr) { 1167 param = ISCSI_FLASHNODE_STATSN; 1168 } else if (attr == &dev_attr_fnode_exp_statsn.attr) { 1169 param = ISCSI_FLASHNODE_EXP_STATSN; 1170 } else { 1171 WARN_ONCE(1, "Invalid flashnode connection attr"); 1172 return 0; 1173 } 1174 1175 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1176 } 1177 1178 static struct attribute_group iscsi_flashnode_conn_attr_group = { 1179 .attrs = iscsi_flashnode_conn_attrs, 1180 .is_visible = iscsi_flashnode_conn_attr_is_visible, 1181 }; 1182 1183 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1184 &iscsi_flashnode_conn_attr_group, 1185 NULL, 1186 }; 1187 1188 static void iscsi_flashnode_conn_release(struct device *dev) 1189 { 1190 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1191 1192 kfree(fnode_conn->ipaddress); 1193 kfree(fnode_conn->redirect_ipaddr); 1194 kfree(fnode_conn->link_local_ipv6_addr); 1195 kfree(fnode_conn); 1196 } 1197 1198 static const struct device_type iscsi_flashnode_conn_dev_type = { 1199 .name = "iscsi_flashnode_conn_dev_type", 1200 .groups = iscsi_flashnode_conn_attr_groups, 1201 .release = iscsi_flashnode_conn_release, 1202 }; 1203 1204 static struct bus_type iscsi_flashnode_bus; 1205 1206 int iscsi_flashnode_bus_match(struct device *dev, 1207 struct device_driver *drv) 1208 { 1209 if (dev->bus == &iscsi_flashnode_bus) 1210 return 1; 1211 return 0; 1212 } 1213 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1214 1215 static struct bus_type iscsi_flashnode_bus = { 1216 .name = "iscsi_flashnode", 1217 .match = &iscsi_flashnode_bus_match, 1218 }; 1219 1220 /** 1221 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs 1222 * @shost: pointer to host data 1223 * @index: index of flashnode to add in sysfs 1224 * @transport: pointer to transport data 1225 * @dd_size: total size to allocate 1226 * 1227 * Adds a sysfs entry for the flashnode session attributes 1228 * 1229 * Returns: 1230 * pointer to allocated flashnode sess on success 1231 * %NULL on failure 1232 */ 1233 struct iscsi_bus_flash_session * 1234 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, 1235 struct iscsi_transport *transport, 1236 int dd_size) 1237 { 1238 struct iscsi_bus_flash_session *fnode_sess; 1239 int err; 1240 1241 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); 1242 if (!fnode_sess) 1243 return NULL; 1244 1245 fnode_sess->transport = transport; 1246 fnode_sess->target_id = index; 1247 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; 1248 fnode_sess->dev.bus = &iscsi_flashnode_bus; 1249 fnode_sess->dev.parent = &shost->shost_gendev; 1250 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", 1251 shost->host_no, index); 1252 1253 err = device_register(&fnode_sess->dev); 1254 if (err) 1255 goto put_dev; 1256 1257 if (dd_size) 1258 fnode_sess->dd_data = &fnode_sess[1]; 1259 1260 return fnode_sess; 1261 1262 put_dev: 1263 put_device(&fnode_sess->dev); 1264 return NULL; 1265 } 1266 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); 1267 1268 /** 1269 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs 1270 * @shost: pointer to host data 1271 * @fnode_sess: pointer to the parent flashnode session entry 1272 * @transport: pointer to transport data 1273 * @dd_size: total size to allocate 1274 * 1275 * Adds a sysfs entry for the flashnode connection attributes 1276 * 1277 * Returns: 1278 * pointer to allocated flashnode conn on success 1279 * %NULL on failure 1280 */ 1281 struct iscsi_bus_flash_conn * 1282 iscsi_create_flashnode_conn(struct Scsi_Host *shost, 1283 struct iscsi_bus_flash_session *fnode_sess, 1284 struct iscsi_transport *transport, 1285 int dd_size) 1286 { 1287 struct iscsi_bus_flash_conn *fnode_conn; 1288 int err; 1289 1290 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); 1291 if (!fnode_conn) 1292 return NULL; 1293 1294 fnode_conn->transport = transport; 1295 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; 1296 fnode_conn->dev.bus = &iscsi_flashnode_bus; 1297 fnode_conn->dev.parent = &fnode_sess->dev; 1298 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", 1299 shost->host_no, fnode_sess->target_id); 1300 1301 err = device_register(&fnode_conn->dev); 1302 if (err) 1303 goto put_dev; 1304 1305 if (dd_size) 1306 fnode_conn->dd_data = &fnode_conn[1]; 1307 1308 return fnode_conn; 1309 1310 put_dev: 1311 put_device(&fnode_conn->dev); 1312 return NULL; 1313 } 1314 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); 1315 1316 /** 1317 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn 1318 * @dev: device to verify 1319 * @data: pointer to data containing value to use for verification 1320 * 1321 * Verifies if the passed device is flashnode conn device 1322 * 1323 * Returns: 1324 * 1 on success 1325 * 0 on failure 1326 */ 1327 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1328 { 1329 return dev->bus == &iscsi_flashnode_bus; 1330 } 1331 1332 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1333 { 1334 device_unregister(&fnode_conn->dev); 1335 return 0; 1336 } 1337 1338 static int flashnode_match_index(struct device *dev, void *data) 1339 { 1340 struct iscsi_bus_flash_session *fnode_sess = NULL; 1341 int ret = 0; 1342 1343 if (!iscsi_flashnode_bus_match(dev, NULL)) 1344 goto exit_match_index; 1345 1346 fnode_sess = iscsi_dev_to_flash_session(dev); 1347 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1348 1349 exit_match_index: 1350 return ret; 1351 } 1352 1353 /** 1354 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1355 * @shost: pointer to host data 1356 * @idx: index to match 1357 * 1358 * Finds the flashnode session object for the passed index 1359 * 1360 * Returns: 1361 * pointer to found flashnode session object on success 1362 * %NULL on failure 1363 */ 1364 static struct iscsi_bus_flash_session * 1365 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1366 { 1367 struct iscsi_bus_flash_session *fnode_sess = NULL; 1368 struct device *dev; 1369 1370 dev = device_find_child(&shost->shost_gendev, &idx, 1371 flashnode_match_index); 1372 if (dev) 1373 fnode_sess = iscsi_dev_to_flash_session(dev); 1374 1375 return fnode_sess; 1376 } 1377 1378 /** 1379 * iscsi_find_flashnode_sess - finds flashnode session entry 1380 * @shost: pointer to host data 1381 * @data: pointer to data containing value to use for comparison 1382 * @fn: function pointer that does actual comparison 1383 * 1384 * Finds the flashnode session object comparing the data passed using logic 1385 * defined in passed function pointer 1386 * 1387 * Returns: 1388 * pointer to found flashnode session device object on success 1389 * %NULL on failure 1390 */ 1391 struct device * 1392 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1393 int (*fn)(struct device *dev, void *data)) 1394 { 1395 return device_find_child(&shost->shost_gendev, data, fn); 1396 } 1397 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1398 1399 /** 1400 * iscsi_find_flashnode_conn - finds flashnode connection entry 1401 * @fnode_sess: pointer to parent flashnode session entry 1402 * 1403 * Finds the flashnode connection object comparing the data passed using logic 1404 * defined in passed function pointer 1405 * 1406 * Returns: 1407 * pointer to found flashnode connection device object on success 1408 * %NULL on failure 1409 */ 1410 struct device * 1411 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1412 { 1413 return device_find_child(&fnode_sess->dev, NULL, 1414 iscsi_is_flashnode_conn_dev); 1415 } 1416 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1417 1418 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1419 { 1420 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1421 return 0; 1422 1423 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1424 } 1425 1426 /** 1427 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1428 * @fnode_sess: pointer to flashnode session entry to be destroyed 1429 * 1430 * Deletes the flashnode session entry and all children flashnode connection 1431 * entries from sysfs 1432 */ 1433 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1434 { 1435 int err; 1436 1437 err = device_for_each_child(&fnode_sess->dev, NULL, 1438 iscsi_iter_destroy_flashnode_conn_fn); 1439 if (err) 1440 pr_err("Could not delete all connections for %s. Error %d.\n", 1441 fnode_sess->dev.kobj.name, err); 1442 1443 device_unregister(&fnode_sess->dev); 1444 } 1445 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1446 1447 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1448 { 1449 if (!iscsi_flashnode_bus_match(dev, NULL)) 1450 return 0; 1451 1452 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1453 return 0; 1454 } 1455 1456 /** 1457 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1458 * @shost: pointer to host data 1459 * 1460 * Destroys all the flashnode session entries and all corresponding children 1461 * flashnode connection entries from sysfs 1462 */ 1463 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1464 { 1465 device_for_each_child(&shost->shost_gendev, NULL, 1466 iscsi_iter_destroy_flashnode_fn); 1467 } 1468 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1469 1470 /* 1471 * BSG support 1472 */ 1473 /** 1474 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1475 * @job: bsg job to be processed 1476 */ 1477 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1478 { 1479 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1480 struct iscsi_bsg_request *req = job->request; 1481 struct iscsi_bsg_reply *reply = job->reply; 1482 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1483 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1484 int ret; 1485 1486 /* check if we have the msgcode value at least */ 1487 if (job->request_len < sizeof(uint32_t)) { 1488 ret = -ENOMSG; 1489 goto fail_host_msg; 1490 } 1491 1492 /* Validate the host command */ 1493 switch (req->msgcode) { 1494 case ISCSI_BSG_HST_VENDOR: 1495 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1496 if ((shost->hostt->vendor_id == 0L) || 1497 (req->rqst_data.h_vendor.vendor_id != 1498 shost->hostt->vendor_id)) { 1499 ret = -ESRCH; 1500 goto fail_host_msg; 1501 } 1502 break; 1503 default: 1504 ret = -EBADR; 1505 goto fail_host_msg; 1506 } 1507 1508 /* check if we really have all the request data needed */ 1509 if (job->request_len < cmdlen) { 1510 ret = -ENOMSG; 1511 goto fail_host_msg; 1512 } 1513 1514 ret = i->iscsi_transport->bsg_request(job); 1515 if (!ret) 1516 return 0; 1517 1518 fail_host_msg: 1519 /* return the errno failure code as the only status */ 1520 BUG_ON(job->reply_len < sizeof(uint32_t)); 1521 reply->reply_payload_rcv_len = 0; 1522 reply->result = ret; 1523 job->reply_len = sizeof(uint32_t); 1524 bsg_job_done(job, ret, 0); 1525 return 0; 1526 } 1527 1528 /** 1529 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1530 * @shost: shost for iscsi_host 1531 * @ihost: iscsi_cls_host adding the structures to 1532 */ 1533 static int 1534 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1535 { 1536 struct device *dev = &shost->shost_gendev; 1537 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1538 struct request_queue *q; 1539 char bsg_name[20]; 1540 1541 if (!i->iscsi_transport->bsg_request) 1542 return -ENOTSUPP; 1543 1544 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1545 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1546 if (IS_ERR(q)) { 1547 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1548 "initialize - no request queue\n"); 1549 return PTR_ERR(q); 1550 } 1551 __scsi_init_queue(shost, q); 1552 1553 ihost->bsg_q = q; 1554 return 0; 1555 } 1556 1557 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1558 struct device *cdev) 1559 { 1560 struct Scsi_Host *shost = dev_to_shost(dev); 1561 struct iscsi_cls_host *ihost = shost->shost_data; 1562 1563 memset(ihost, 0, sizeof(*ihost)); 1564 mutex_init(&ihost->mutex); 1565 1566 iscsi_bsg_host_add(shost, ihost); 1567 /* ignore any bsg add error - we just can't do sgio */ 1568 1569 return 0; 1570 } 1571 1572 static int iscsi_remove_host(struct transport_container *tc, 1573 struct device *dev, struct device *cdev) 1574 { 1575 struct Scsi_Host *shost = dev_to_shost(dev); 1576 struct iscsi_cls_host *ihost = shost->shost_data; 1577 1578 bsg_remove_queue(ihost->bsg_q); 1579 return 0; 1580 } 1581 1582 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1583 "iscsi_host", 1584 iscsi_setup_host, 1585 iscsi_remove_host, 1586 NULL); 1587 1588 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1589 "iscsi_session", 1590 NULL, 1591 NULL, 1592 NULL); 1593 1594 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1595 "iscsi_connection", 1596 NULL, 1597 NULL, 1598 NULL); 1599 1600 static struct sock *nls; 1601 static DEFINE_MUTEX(rx_queue_mutex); 1602 1603 static LIST_HEAD(sesslist); 1604 static DEFINE_SPINLOCK(sesslock); 1605 static LIST_HEAD(connlist); 1606 static LIST_HEAD(connlist_err); 1607 static DEFINE_SPINLOCK(connlock); 1608 1609 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1610 { 1611 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1612 return sess->sid; 1613 } 1614 1615 /* 1616 * Returns the matching session to a given sid 1617 */ 1618 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1619 { 1620 unsigned long flags; 1621 struct iscsi_cls_session *sess; 1622 1623 spin_lock_irqsave(&sesslock, flags); 1624 list_for_each_entry(sess, &sesslist, sess_list) { 1625 if (sess->sid == sid) { 1626 spin_unlock_irqrestore(&sesslock, flags); 1627 return sess; 1628 } 1629 } 1630 spin_unlock_irqrestore(&sesslock, flags); 1631 return NULL; 1632 } 1633 1634 /* 1635 * Returns the matching connection to a given sid / cid tuple 1636 */ 1637 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1638 { 1639 unsigned long flags; 1640 struct iscsi_cls_conn *conn; 1641 1642 spin_lock_irqsave(&connlock, flags); 1643 list_for_each_entry(conn, &connlist, conn_list) { 1644 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1645 spin_unlock_irqrestore(&connlock, flags); 1646 return conn; 1647 } 1648 } 1649 spin_unlock_irqrestore(&connlock, flags); 1650 return NULL; 1651 } 1652 1653 /* 1654 * The following functions can be used by LLDs that allocate 1655 * their own scsi_hosts or by software iscsi LLDs 1656 */ 1657 static struct { 1658 int value; 1659 char *name; 1660 } iscsi_session_state_names[] = { 1661 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1662 { ISCSI_SESSION_FAILED, "FAILED" }, 1663 { ISCSI_SESSION_FREE, "FREE" }, 1664 }; 1665 1666 static const char *iscsi_session_state_name(int state) 1667 { 1668 int i; 1669 char *name = NULL; 1670 1671 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1672 if (iscsi_session_state_names[i].value == state) { 1673 name = iscsi_session_state_names[i].name; 1674 break; 1675 } 1676 } 1677 return name; 1678 } 1679 1680 int iscsi_session_chkready(struct iscsi_cls_session *session) 1681 { 1682 int err; 1683 1684 switch (session->state) { 1685 case ISCSI_SESSION_LOGGED_IN: 1686 err = 0; 1687 break; 1688 case ISCSI_SESSION_FAILED: 1689 err = DID_IMM_RETRY << 16; 1690 break; 1691 case ISCSI_SESSION_FREE: 1692 err = DID_TRANSPORT_FAILFAST << 16; 1693 break; 1694 default: 1695 err = DID_NO_CONNECT << 16; 1696 break; 1697 } 1698 return err; 1699 } 1700 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1701 1702 int iscsi_is_session_online(struct iscsi_cls_session *session) 1703 { 1704 unsigned long flags; 1705 int ret = 0; 1706 1707 spin_lock_irqsave(&session->lock, flags); 1708 if (session->state == ISCSI_SESSION_LOGGED_IN) 1709 ret = 1; 1710 spin_unlock_irqrestore(&session->lock, flags); 1711 return ret; 1712 } 1713 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1714 1715 static void iscsi_session_release(struct device *dev) 1716 { 1717 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1718 struct Scsi_Host *shost; 1719 1720 shost = iscsi_session_to_shost(session); 1721 scsi_host_put(shost); 1722 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1723 kfree(session); 1724 } 1725 1726 int iscsi_is_session_dev(const struct device *dev) 1727 { 1728 return dev->release == iscsi_session_release; 1729 } 1730 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1731 1732 static int iscsi_iter_session_fn(struct device *dev, void *data) 1733 { 1734 void (* fn) (struct iscsi_cls_session *) = data; 1735 1736 if (!iscsi_is_session_dev(dev)) 1737 return 0; 1738 fn(iscsi_dev_to_session(dev)); 1739 return 0; 1740 } 1741 1742 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1743 void (*fn)(struct iscsi_cls_session *)) 1744 { 1745 device_for_each_child(&shost->shost_gendev, fn, 1746 iscsi_iter_session_fn); 1747 } 1748 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1749 1750 struct iscsi_scan_data { 1751 unsigned int channel; 1752 unsigned int id; 1753 u64 lun; 1754 enum scsi_scan_mode rescan; 1755 }; 1756 1757 static int iscsi_user_scan_session(struct device *dev, void *data) 1758 { 1759 struct iscsi_scan_data *scan_data = data; 1760 struct iscsi_cls_session *session; 1761 struct Scsi_Host *shost; 1762 struct iscsi_cls_host *ihost; 1763 unsigned long flags; 1764 unsigned int id; 1765 1766 if (!iscsi_is_session_dev(dev)) 1767 return 0; 1768 1769 session = iscsi_dev_to_session(dev); 1770 1771 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1772 1773 shost = iscsi_session_to_shost(session); 1774 ihost = shost->shost_data; 1775 1776 mutex_lock(&ihost->mutex); 1777 spin_lock_irqsave(&session->lock, flags); 1778 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1779 spin_unlock_irqrestore(&session->lock, flags); 1780 goto user_scan_exit; 1781 } 1782 id = session->target_id; 1783 spin_unlock_irqrestore(&session->lock, flags); 1784 1785 if (id != ISCSI_MAX_TARGET) { 1786 if ((scan_data->channel == SCAN_WILD_CARD || 1787 scan_data->channel == 0) && 1788 (scan_data->id == SCAN_WILD_CARD || 1789 scan_data->id == id)) 1790 scsi_scan_target(&session->dev, 0, id, 1791 scan_data->lun, scan_data->rescan); 1792 } 1793 1794 user_scan_exit: 1795 mutex_unlock(&ihost->mutex); 1796 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1797 return 0; 1798 } 1799 1800 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1801 uint id, u64 lun) 1802 { 1803 struct iscsi_scan_data scan_data; 1804 1805 scan_data.channel = channel; 1806 scan_data.id = id; 1807 scan_data.lun = lun; 1808 scan_data.rescan = SCSI_SCAN_MANUAL; 1809 1810 return device_for_each_child(&shost->shost_gendev, &scan_data, 1811 iscsi_user_scan_session); 1812 } 1813 1814 static void iscsi_scan_session(struct work_struct *work) 1815 { 1816 struct iscsi_cls_session *session = 1817 container_of(work, struct iscsi_cls_session, scan_work); 1818 struct iscsi_scan_data scan_data; 1819 1820 scan_data.channel = 0; 1821 scan_data.id = SCAN_WILD_CARD; 1822 scan_data.lun = SCAN_WILD_CARD; 1823 scan_data.rescan = SCSI_SCAN_RESCAN; 1824 1825 iscsi_user_scan_session(&session->dev, &scan_data); 1826 } 1827 1828 /** 1829 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1830 * @cmd: scsi cmd passed to scsi eh handler 1831 * 1832 * If the session is down this function will wait for the recovery 1833 * timer to fire or for the session to be logged back in. If the 1834 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1835 * should pass this error value to the scsi eh. 1836 */ 1837 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1838 { 1839 struct iscsi_cls_session *session = 1840 starget_to_session(scsi_target(cmd->device)); 1841 unsigned long flags; 1842 int ret = 0; 1843 1844 spin_lock_irqsave(&session->lock, flags); 1845 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1846 if (session->state == ISCSI_SESSION_FREE) { 1847 ret = FAST_IO_FAIL; 1848 break; 1849 } 1850 spin_unlock_irqrestore(&session->lock, flags); 1851 msleep(1000); 1852 spin_lock_irqsave(&session->lock, flags); 1853 } 1854 spin_unlock_irqrestore(&session->lock, flags); 1855 return ret; 1856 } 1857 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1858 1859 static void session_recovery_timedout(struct work_struct *work) 1860 { 1861 struct iscsi_cls_session *session = 1862 container_of(work, struct iscsi_cls_session, 1863 recovery_work.work); 1864 unsigned long flags; 1865 1866 iscsi_cls_session_printk(KERN_INFO, session, 1867 "session recovery timed out after %d secs\n", 1868 session->recovery_tmo); 1869 1870 spin_lock_irqsave(&session->lock, flags); 1871 switch (session->state) { 1872 case ISCSI_SESSION_FAILED: 1873 session->state = ISCSI_SESSION_FREE; 1874 break; 1875 case ISCSI_SESSION_LOGGED_IN: 1876 case ISCSI_SESSION_FREE: 1877 /* we raced with the unblock's flush */ 1878 spin_unlock_irqrestore(&session->lock, flags); 1879 return; 1880 } 1881 spin_unlock_irqrestore(&session->lock, flags); 1882 1883 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1884 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1885 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1886 1887 if (session->transport->session_recovery_timedout) 1888 session->transport->session_recovery_timedout(session); 1889 } 1890 1891 static void __iscsi_unblock_session(struct work_struct *work) 1892 { 1893 struct iscsi_cls_session *session = 1894 container_of(work, struct iscsi_cls_session, 1895 unblock_work); 1896 unsigned long flags; 1897 1898 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1899 1900 cancel_delayed_work_sync(&session->recovery_work); 1901 spin_lock_irqsave(&session->lock, flags); 1902 session->state = ISCSI_SESSION_LOGGED_IN; 1903 spin_unlock_irqrestore(&session->lock, flags); 1904 /* start IO */ 1905 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1906 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1907 } 1908 1909 /** 1910 * iscsi_unblock_session - set a session as logged in and start IO. 1911 * @session: iscsi session 1912 * 1913 * Mark a session as ready to accept IO. 1914 */ 1915 void iscsi_unblock_session(struct iscsi_cls_session *session) 1916 { 1917 if (!cancel_work_sync(&session->block_work)) 1918 cancel_delayed_work_sync(&session->recovery_work); 1919 1920 queue_work(session->workq, &session->unblock_work); 1921 /* 1922 * Blocking the session can be done from any context so we only 1923 * queue the block work. Make sure the unblock work has completed 1924 * because it flushes/cancels the other works and updates the state. 1925 */ 1926 flush_work(&session->unblock_work); 1927 } 1928 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1929 1930 static void __iscsi_block_session(struct work_struct *work) 1931 { 1932 struct iscsi_cls_session *session = 1933 container_of(work, struct iscsi_cls_session, 1934 block_work); 1935 unsigned long flags; 1936 1937 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1938 spin_lock_irqsave(&session->lock, flags); 1939 session->state = ISCSI_SESSION_FAILED; 1940 spin_unlock_irqrestore(&session->lock, flags); 1941 scsi_target_block(&session->dev); 1942 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1943 if (session->recovery_tmo >= 0) 1944 queue_delayed_work(session->workq, 1945 &session->recovery_work, 1946 session->recovery_tmo * HZ); 1947 } 1948 1949 void iscsi_block_session(struct iscsi_cls_session *session) 1950 { 1951 queue_work(session->workq, &session->block_work); 1952 } 1953 EXPORT_SYMBOL_GPL(iscsi_block_session); 1954 1955 static void __iscsi_unbind_session(struct work_struct *work) 1956 { 1957 struct iscsi_cls_session *session = 1958 container_of(work, struct iscsi_cls_session, 1959 unbind_work); 1960 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1961 struct iscsi_cls_host *ihost = shost->shost_data; 1962 unsigned long flags; 1963 unsigned int target_id; 1964 1965 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 1966 1967 /* Prevent new scans and make sure scanning is not in progress */ 1968 mutex_lock(&ihost->mutex); 1969 spin_lock_irqsave(&session->lock, flags); 1970 if (session->target_id == ISCSI_MAX_TARGET) { 1971 spin_unlock_irqrestore(&session->lock, flags); 1972 mutex_unlock(&ihost->mutex); 1973 goto unbind_session_exit; 1974 } 1975 1976 target_id = session->target_id; 1977 session->target_id = ISCSI_MAX_TARGET; 1978 spin_unlock_irqrestore(&session->lock, flags); 1979 mutex_unlock(&ihost->mutex); 1980 1981 scsi_remove_target(&session->dev); 1982 1983 if (session->ida_used) 1984 ida_free(&iscsi_sess_ida, target_id); 1985 1986 unbind_session_exit: 1987 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 1988 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 1989 } 1990 1991 static void __iscsi_destroy_session(struct work_struct *work) 1992 { 1993 struct iscsi_cls_session *session = 1994 container_of(work, struct iscsi_cls_session, destroy_work); 1995 1996 session->transport->destroy_session(session); 1997 } 1998 1999 struct iscsi_cls_session * 2000 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2001 int dd_size) 2002 { 2003 struct iscsi_cls_session *session; 2004 2005 session = kzalloc(sizeof(*session) + dd_size, 2006 GFP_KERNEL); 2007 if (!session) 2008 return NULL; 2009 2010 session->transport = transport; 2011 session->creator = -1; 2012 session->recovery_tmo = 120; 2013 session->recovery_tmo_sysfs_override = false; 2014 session->state = ISCSI_SESSION_FREE; 2015 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2016 INIT_LIST_HEAD(&session->sess_list); 2017 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2018 INIT_WORK(&session->block_work, __iscsi_block_session); 2019 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2020 INIT_WORK(&session->scan_work, iscsi_scan_session); 2021 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2022 spin_lock_init(&session->lock); 2023 2024 /* this is released in the dev's release function */ 2025 scsi_host_get(shost); 2026 session->dev.parent = &shost->shost_gendev; 2027 session->dev.release = iscsi_session_release; 2028 device_initialize(&session->dev); 2029 if (dd_size) 2030 session->dd_data = &session[1]; 2031 2032 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2033 return session; 2034 } 2035 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2036 2037 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2038 { 2039 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2040 unsigned long flags; 2041 int id = 0; 2042 int err; 2043 2044 session->sid = atomic_add_return(1, &iscsi_session_nr); 2045 2046 session->workq = alloc_workqueue("iscsi_ctrl_%d:%d", 2047 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 2048 shost->host_no, session->sid); 2049 if (!session->workq) 2050 return -ENOMEM; 2051 2052 if (target_id == ISCSI_MAX_TARGET) { 2053 id = ida_alloc(&iscsi_sess_ida, GFP_KERNEL); 2054 2055 if (id < 0) { 2056 iscsi_cls_session_printk(KERN_ERR, session, 2057 "Failure in Target ID Allocation\n"); 2058 err = id; 2059 goto destroy_wq; 2060 } 2061 session->target_id = (unsigned int)id; 2062 session->ida_used = true; 2063 } else 2064 session->target_id = target_id; 2065 2066 dev_set_name(&session->dev, "session%u", session->sid); 2067 err = device_add(&session->dev); 2068 if (err) { 2069 iscsi_cls_session_printk(KERN_ERR, session, 2070 "could not register session's dev\n"); 2071 goto release_ida; 2072 } 2073 err = transport_register_device(&session->dev); 2074 if (err) { 2075 iscsi_cls_session_printk(KERN_ERR, session, 2076 "could not register transport's dev\n"); 2077 goto release_dev; 2078 } 2079 2080 spin_lock_irqsave(&sesslock, flags); 2081 list_add(&session->sess_list, &sesslist); 2082 spin_unlock_irqrestore(&sesslock, flags); 2083 2084 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2085 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2086 return 0; 2087 2088 release_dev: 2089 device_del(&session->dev); 2090 release_ida: 2091 if (session->ida_used) 2092 ida_free(&iscsi_sess_ida, session->target_id); 2093 destroy_wq: 2094 destroy_workqueue(session->workq); 2095 return err; 2096 } 2097 EXPORT_SYMBOL_GPL(iscsi_add_session); 2098 2099 /** 2100 * iscsi_create_session - create iscsi class session 2101 * @shost: scsi host 2102 * @transport: iscsi transport 2103 * @dd_size: private driver data size 2104 * @target_id: which target 2105 * 2106 * This can be called from a LLD or iscsi_transport. 2107 */ 2108 struct iscsi_cls_session * 2109 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2110 int dd_size, unsigned int target_id) 2111 { 2112 struct iscsi_cls_session *session; 2113 2114 session = iscsi_alloc_session(shost, transport, dd_size); 2115 if (!session) 2116 return NULL; 2117 2118 if (iscsi_add_session(session, target_id)) { 2119 iscsi_free_session(session); 2120 return NULL; 2121 } 2122 return session; 2123 } 2124 EXPORT_SYMBOL_GPL(iscsi_create_session); 2125 2126 static void iscsi_conn_release(struct device *dev) 2127 { 2128 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2129 struct device *parent = conn->dev.parent; 2130 2131 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2132 kfree(conn); 2133 put_device(parent); 2134 } 2135 2136 static int iscsi_is_conn_dev(const struct device *dev) 2137 { 2138 return dev->release == iscsi_conn_release; 2139 } 2140 2141 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2142 { 2143 if (!iscsi_is_conn_dev(dev)) 2144 return 0; 2145 2146 iscsi_remove_conn(iscsi_dev_to_conn(dev)); 2147 return 0; 2148 } 2149 2150 void iscsi_remove_session(struct iscsi_cls_session *session) 2151 { 2152 unsigned long flags; 2153 int err; 2154 2155 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2156 2157 spin_lock_irqsave(&sesslock, flags); 2158 if (!list_empty(&session->sess_list)) 2159 list_del(&session->sess_list); 2160 spin_unlock_irqrestore(&sesslock, flags); 2161 2162 if (!cancel_work_sync(&session->block_work)) 2163 cancel_delayed_work_sync(&session->recovery_work); 2164 cancel_work_sync(&session->unblock_work); 2165 /* 2166 * If we are blocked let commands flow again. The lld or iscsi 2167 * layer should set up the queuecommand to fail commands. 2168 * We assume that LLD will not be calling block/unblock while 2169 * removing the session. 2170 */ 2171 spin_lock_irqsave(&session->lock, flags); 2172 session->state = ISCSI_SESSION_FREE; 2173 spin_unlock_irqrestore(&session->lock, flags); 2174 2175 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2176 /* 2177 * qla4xxx can perform it's own scans when it runs in kernel only 2178 * mode. Make sure to flush those scans. 2179 */ 2180 flush_work(&session->scan_work); 2181 /* flush running unbind operations */ 2182 flush_work(&session->unbind_work); 2183 __iscsi_unbind_session(&session->unbind_work); 2184 2185 /* hw iscsi may not have removed all connections from session */ 2186 err = device_for_each_child(&session->dev, NULL, 2187 iscsi_iter_destroy_conn_fn); 2188 if (err) 2189 iscsi_cls_session_printk(KERN_ERR, session, 2190 "Could not delete all connections " 2191 "for session. Error %d.\n", err); 2192 2193 transport_unregister_device(&session->dev); 2194 2195 destroy_workqueue(session->workq); 2196 2197 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2198 device_del(&session->dev); 2199 } 2200 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2201 2202 static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag) 2203 { 2204 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n"); 2205 2206 switch (flag) { 2207 case STOP_CONN_RECOVER: 2208 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2209 break; 2210 case STOP_CONN_TERM: 2211 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2212 break; 2213 default: 2214 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n", 2215 flag); 2216 return; 2217 } 2218 2219 conn->transport->stop_conn(conn, flag); 2220 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n"); 2221 } 2222 2223 static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active) 2224 { 2225 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2226 struct iscsi_endpoint *ep; 2227 2228 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n"); 2229 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2230 2231 if (!conn->ep || !session->transport->ep_disconnect) 2232 return; 2233 2234 ep = conn->ep; 2235 conn->ep = NULL; 2236 2237 session->transport->unbind_conn(conn, is_active); 2238 session->transport->ep_disconnect(ep); 2239 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n"); 2240 } 2241 2242 static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn, 2243 struct iscsi_endpoint *ep, 2244 bool is_active) 2245 { 2246 /* Check if this was a conn error and the kernel took ownership */ 2247 spin_lock_irq(&conn->lock); 2248 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2249 spin_unlock_irq(&conn->lock); 2250 iscsi_ep_disconnect(conn, is_active); 2251 } else { 2252 spin_unlock_irq(&conn->lock); 2253 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n"); 2254 mutex_unlock(&conn->ep_mutex); 2255 2256 flush_work(&conn->cleanup_work); 2257 /* 2258 * Userspace is now done with the EP so we can release the ref 2259 * iscsi_cleanup_conn_work_fn took. 2260 */ 2261 iscsi_put_endpoint(ep); 2262 mutex_lock(&conn->ep_mutex); 2263 } 2264 } 2265 2266 static int iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2267 { 2268 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n"); 2269 /* 2270 * For offload, iscsid may not know about the ep like when iscsid is 2271 * restarted or for kernel based session shutdown iscsid is not even 2272 * up. For these cases, we do the disconnect now. 2273 */ 2274 mutex_lock(&conn->ep_mutex); 2275 if (conn->ep) 2276 iscsi_if_disconnect_bound_ep(conn, conn->ep, true); 2277 mutex_unlock(&conn->ep_mutex); 2278 2279 /* 2280 * If this is a termination we have to call stop_conn with that flag 2281 * so the correct states get set. If we haven't run the work yet try to 2282 * avoid the extra run. 2283 */ 2284 if (flag == STOP_CONN_TERM) { 2285 cancel_work_sync(&conn->cleanup_work); 2286 iscsi_stop_conn(conn, flag); 2287 } else { 2288 /* 2289 * Figure out if it was the kernel or userspace initiating this. 2290 */ 2291 spin_lock_irq(&conn->lock); 2292 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2293 spin_unlock_irq(&conn->lock); 2294 iscsi_stop_conn(conn, flag); 2295 } else { 2296 spin_unlock_irq(&conn->lock); 2297 ISCSI_DBG_TRANS_CONN(conn, 2298 "flush kernel conn cleanup.\n"); 2299 flush_work(&conn->cleanup_work); 2300 } 2301 /* 2302 * Only clear for recovery to avoid extra cleanup runs during 2303 * termination. 2304 */ 2305 spin_lock_irq(&conn->lock); 2306 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags); 2307 spin_unlock_irq(&conn->lock); 2308 } 2309 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n"); 2310 return 0; 2311 } 2312 2313 static void iscsi_cleanup_conn_work_fn(struct work_struct *work) 2314 { 2315 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn, 2316 cleanup_work); 2317 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2318 2319 mutex_lock(&conn->ep_mutex); 2320 /* 2321 * Get a ref to the ep, so we don't release its ID until after 2322 * userspace is done referencing it in iscsi_if_disconnect_bound_ep. 2323 */ 2324 if (conn->ep) 2325 get_device(&conn->ep->dev); 2326 iscsi_ep_disconnect(conn, false); 2327 2328 if (system_state != SYSTEM_RUNNING) { 2329 /* 2330 * If the user has set up for the session to never timeout 2331 * then hang like they wanted. For all other cases fail right 2332 * away since userspace is not going to relogin. 2333 */ 2334 if (session->recovery_tmo > 0) 2335 session->recovery_tmo = 0; 2336 } 2337 2338 iscsi_stop_conn(conn, STOP_CONN_RECOVER); 2339 mutex_unlock(&conn->ep_mutex); 2340 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n"); 2341 } 2342 2343 static int iscsi_iter_force_destroy_conn_fn(struct device *dev, void *data) 2344 { 2345 struct iscsi_transport *transport; 2346 struct iscsi_cls_conn *conn; 2347 2348 if (!iscsi_is_conn_dev(dev)) 2349 return 0; 2350 2351 conn = iscsi_dev_to_conn(dev); 2352 transport = conn->transport; 2353 2354 if (READ_ONCE(conn->state) != ISCSI_CONN_DOWN) 2355 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2356 2357 transport->destroy_conn(conn); 2358 return 0; 2359 } 2360 2361 /** 2362 * iscsi_force_destroy_session - destroy a session from the kernel 2363 * @session: session to destroy 2364 * 2365 * Force the destruction of a session from the kernel. This should only be 2366 * used when userspace is no longer running during system shutdown. 2367 */ 2368 void iscsi_force_destroy_session(struct iscsi_cls_session *session) 2369 { 2370 struct iscsi_transport *transport = session->transport; 2371 unsigned long flags; 2372 2373 WARN_ON_ONCE(system_state == SYSTEM_RUNNING); 2374 2375 spin_lock_irqsave(&sesslock, flags); 2376 if (list_empty(&session->sess_list)) { 2377 spin_unlock_irqrestore(&sesslock, flags); 2378 /* 2379 * Conn/ep is already freed. Session is being torn down via 2380 * async path. For shutdown we don't care about it so return. 2381 */ 2382 return; 2383 } 2384 spin_unlock_irqrestore(&sesslock, flags); 2385 2386 device_for_each_child(&session->dev, NULL, 2387 iscsi_iter_force_destroy_conn_fn); 2388 transport->destroy_session(session); 2389 } 2390 EXPORT_SYMBOL_GPL(iscsi_force_destroy_session); 2391 2392 void iscsi_free_session(struct iscsi_cls_session *session) 2393 { 2394 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2395 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2396 put_device(&session->dev); 2397 } 2398 EXPORT_SYMBOL_GPL(iscsi_free_session); 2399 2400 /** 2401 * iscsi_alloc_conn - alloc iscsi class connection 2402 * @session: iscsi cls session 2403 * @dd_size: private driver data size 2404 * @cid: connection id 2405 */ 2406 struct iscsi_cls_conn * 2407 iscsi_alloc_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2408 { 2409 struct iscsi_transport *transport = session->transport; 2410 struct iscsi_cls_conn *conn; 2411 2412 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2413 if (!conn) 2414 return NULL; 2415 if (dd_size) 2416 conn->dd_data = &conn[1]; 2417 2418 mutex_init(&conn->ep_mutex); 2419 spin_lock_init(&conn->lock); 2420 INIT_LIST_HEAD(&conn->conn_list); 2421 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn); 2422 conn->transport = transport; 2423 conn->cid = cid; 2424 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2425 2426 /* this is released in the dev's release function */ 2427 if (!get_device(&session->dev)) 2428 goto free_conn; 2429 2430 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2431 device_initialize(&conn->dev); 2432 conn->dev.parent = &session->dev; 2433 conn->dev.release = iscsi_conn_release; 2434 2435 return conn; 2436 2437 free_conn: 2438 kfree(conn); 2439 return NULL; 2440 } 2441 EXPORT_SYMBOL_GPL(iscsi_alloc_conn); 2442 2443 /** 2444 * iscsi_add_conn - add iscsi class connection 2445 * @conn: iscsi cls connection 2446 * 2447 * This will expose iscsi_cls_conn to sysfs so make sure the related 2448 * resources for sysfs attributes are initialized before calling this. 2449 */ 2450 int iscsi_add_conn(struct iscsi_cls_conn *conn) 2451 { 2452 int err; 2453 unsigned long flags; 2454 struct iscsi_cls_session *session = iscsi_dev_to_session(conn->dev.parent); 2455 2456 err = device_add(&conn->dev); 2457 if (err) { 2458 iscsi_cls_session_printk(KERN_ERR, session, 2459 "could not register connection's dev\n"); 2460 return err; 2461 } 2462 err = transport_register_device(&conn->dev); 2463 if (err) { 2464 iscsi_cls_session_printk(KERN_ERR, session, 2465 "could not register transport's dev\n"); 2466 device_del(&conn->dev); 2467 return err; 2468 } 2469 2470 spin_lock_irqsave(&connlock, flags); 2471 list_add(&conn->conn_list, &connlist); 2472 spin_unlock_irqrestore(&connlock, flags); 2473 2474 return 0; 2475 } 2476 EXPORT_SYMBOL_GPL(iscsi_add_conn); 2477 2478 /** 2479 * iscsi_remove_conn - remove iscsi class connection from sysfs 2480 * @conn: iscsi cls connection 2481 * 2482 * Remove iscsi_cls_conn from sysfs, and wait for previous 2483 * read/write of iscsi_cls_conn's attributes in sysfs to finish. 2484 */ 2485 void iscsi_remove_conn(struct iscsi_cls_conn *conn) 2486 { 2487 unsigned long flags; 2488 2489 spin_lock_irqsave(&connlock, flags); 2490 list_del(&conn->conn_list); 2491 spin_unlock_irqrestore(&connlock, flags); 2492 2493 transport_unregister_device(&conn->dev); 2494 device_del(&conn->dev); 2495 } 2496 EXPORT_SYMBOL_GPL(iscsi_remove_conn); 2497 2498 void iscsi_put_conn(struct iscsi_cls_conn *conn) 2499 { 2500 put_device(&conn->dev); 2501 } 2502 EXPORT_SYMBOL_GPL(iscsi_put_conn); 2503 2504 void iscsi_get_conn(struct iscsi_cls_conn *conn) 2505 { 2506 get_device(&conn->dev); 2507 } 2508 EXPORT_SYMBOL_GPL(iscsi_get_conn); 2509 2510 /* 2511 * iscsi interface functions 2512 */ 2513 static struct iscsi_internal * 2514 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2515 { 2516 struct iscsi_internal *priv; 2517 unsigned long flags; 2518 2519 spin_lock_irqsave(&iscsi_transport_lock, flags); 2520 list_for_each_entry(priv, &iscsi_transports, list) { 2521 if (tt == priv->iscsi_transport) { 2522 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2523 return priv; 2524 } 2525 } 2526 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2527 return NULL; 2528 } 2529 2530 static int 2531 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2532 { 2533 return nlmsg_multicast(nls, skb, 0, group, gfp); 2534 } 2535 2536 static int 2537 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2538 { 2539 return nlmsg_unicast(nls, skb, portid); 2540 } 2541 2542 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2543 char *data, uint32_t data_size) 2544 { 2545 struct nlmsghdr *nlh; 2546 struct sk_buff *skb; 2547 struct iscsi_uevent *ev; 2548 char *pdu; 2549 struct iscsi_internal *priv; 2550 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2551 data_size); 2552 2553 priv = iscsi_if_transport_lookup(conn->transport); 2554 if (!priv) 2555 return -EINVAL; 2556 2557 skb = alloc_skb(len, GFP_ATOMIC); 2558 if (!skb) { 2559 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2560 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2561 "control PDU: OOM\n"); 2562 return -ENOMEM; 2563 } 2564 2565 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2566 ev = nlmsg_data(nlh); 2567 memset(ev, 0, sizeof(*ev)); 2568 ev->transport_handle = iscsi_handle(conn->transport); 2569 ev->type = ISCSI_KEVENT_RECV_PDU; 2570 ev->r.recv_req.cid = conn->cid; 2571 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2572 pdu = (char*)ev + sizeof(*ev); 2573 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2574 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2575 2576 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2577 } 2578 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2579 2580 int iscsi_offload_mesg(struct Scsi_Host *shost, 2581 struct iscsi_transport *transport, uint32_t type, 2582 char *data, uint16_t data_size) 2583 { 2584 struct nlmsghdr *nlh; 2585 struct sk_buff *skb; 2586 struct iscsi_uevent *ev; 2587 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2588 2589 skb = alloc_skb(len, GFP_ATOMIC); 2590 if (!skb) { 2591 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2592 return -ENOMEM; 2593 } 2594 2595 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2596 ev = nlmsg_data(nlh); 2597 memset(ev, 0, sizeof(*ev)); 2598 ev->type = type; 2599 ev->transport_handle = iscsi_handle(transport); 2600 switch (type) { 2601 case ISCSI_KEVENT_PATH_REQ: 2602 ev->r.req_path.host_no = shost->host_no; 2603 break; 2604 case ISCSI_KEVENT_IF_DOWN: 2605 ev->r.notify_if_down.host_no = shost->host_no; 2606 break; 2607 } 2608 2609 memcpy((char *)ev + sizeof(*ev), data, data_size); 2610 2611 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2612 } 2613 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2614 2615 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2616 { 2617 struct nlmsghdr *nlh; 2618 struct sk_buff *skb; 2619 struct iscsi_uevent *ev; 2620 struct iscsi_internal *priv; 2621 int len = nlmsg_total_size(sizeof(*ev)); 2622 unsigned long flags; 2623 int state; 2624 2625 spin_lock_irqsave(&conn->lock, flags); 2626 /* 2627 * Userspace will only do a stop call if we are at least bound. And, we 2628 * only need to do the in kernel cleanup if in the UP state so cmds can 2629 * be released to upper layers. If in other states just wait for 2630 * userspace to avoid races that can leave the cleanup_work queued. 2631 */ 2632 state = READ_ONCE(conn->state); 2633 switch (state) { 2634 case ISCSI_CONN_BOUND: 2635 case ISCSI_CONN_UP: 2636 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, 2637 &conn->flags)) { 2638 queue_work(iscsi_conn_cleanup_workq, 2639 &conn->cleanup_work); 2640 } 2641 break; 2642 default: 2643 ISCSI_DBG_TRANS_CONN(conn, "Got conn error in state %d\n", 2644 state); 2645 break; 2646 } 2647 spin_unlock_irqrestore(&conn->lock, flags); 2648 2649 priv = iscsi_if_transport_lookup(conn->transport); 2650 if (!priv) 2651 return; 2652 2653 skb = alloc_skb(len, GFP_ATOMIC); 2654 if (!skb) { 2655 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2656 "conn error (%d)\n", error); 2657 return; 2658 } 2659 2660 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2661 ev = nlmsg_data(nlh); 2662 ev->transport_handle = iscsi_handle(conn->transport); 2663 ev->type = ISCSI_KEVENT_CONN_ERROR; 2664 ev->r.connerror.error = error; 2665 ev->r.connerror.cid = conn->cid; 2666 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2667 2668 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2669 2670 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2671 error); 2672 } 2673 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2674 2675 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2676 enum iscsi_conn_state state) 2677 { 2678 struct nlmsghdr *nlh; 2679 struct sk_buff *skb; 2680 struct iscsi_uevent *ev; 2681 struct iscsi_internal *priv; 2682 int len = nlmsg_total_size(sizeof(*ev)); 2683 2684 priv = iscsi_if_transport_lookup(conn->transport); 2685 if (!priv) 2686 return; 2687 2688 skb = alloc_skb(len, GFP_ATOMIC); 2689 if (!skb) { 2690 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2691 "conn login (%d)\n", state); 2692 return; 2693 } 2694 2695 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2696 ev = nlmsg_data(nlh); 2697 ev->transport_handle = iscsi_handle(conn->transport); 2698 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2699 ev->r.conn_login.state = state; 2700 ev->r.conn_login.cid = conn->cid; 2701 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2702 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2703 2704 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2705 state); 2706 } 2707 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2708 2709 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2710 enum iscsi_host_event_code code, uint32_t data_size, 2711 uint8_t *data) 2712 { 2713 struct nlmsghdr *nlh; 2714 struct sk_buff *skb; 2715 struct iscsi_uevent *ev; 2716 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2717 2718 skb = alloc_skb(len, GFP_NOIO); 2719 if (!skb) { 2720 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2721 host_no, code); 2722 return; 2723 } 2724 2725 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2726 ev = nlmsg_data(nlh); 2727 ev->transport_handle = iscsi_handle(transport); 2728 ev->type = ISCSI_KEVENT_HOST_EVENT; 2729 ev->r.host_event.host_no = host_no; 2730 ev->r.host_event.code = code; 2731 ev->r.host_event.data_size = data_size; 2732 2733 if (data_size) 2734 memcpy((char *)ev + sizeof(*ev), data, data_size); 2735 2736 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2737 } 2738 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2739 2740 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2741 uint32_t status, uint32_t pid, uint32_t data_size, 2742 uint8_t *data) 2743 { 2744 struct nlmsghdr *nlh; 2745 struct sk_buff *skb; 2746 struct iscsi_uevent *ev; 2747 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2748 2749 skb = alloc_skb(len, GFP_NOIO); 2750 if (!skb) { 2751 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2752 return; 2753 } 2754 2755 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2756 ev = nlmsg_data(nlh); 2757 ev->transport_handle = iscsi_handle(transport); 2758 ev->type = ISCSI_KEVENT_PING_COMP; 2759 ev->r.ping_comp.host_no = host_no; 2760 ev->r.ping_comp.status = status; 2761 ev->r.ping_comp.pid = pid; 2762 ev->r.ping_comp.data_size = data_size; 2763 memcpy((char *)ev + sizeof(*ev), data, data_size); 2764 2765 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2766 } 2767 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2768 2769 static int 2770 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2771 { 2772 struct sk_buff *skb; 2773 struct nlmsghdr *nlh; 2774 int len = nlmsg_total_size(size); 2775 2776 skb = alloc_skb(len, GFP_ATOMIC); 2777 if (!skb) { 2778 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2779 return -ENOMEM; 2780 } 2781 2782 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2783 memcpy(nlmsg_data(nlh), payload, size); 2784 return iscsi_unicast_skb(skb, portid); 2785 } 2786 2787 static int 2788 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2789 { 2790 struct iscsi_uevent *ev = nlmsg_data(nlh); 2791 struct iscsi_stats *stats; 2792 struct sk_buff *skbstat; 2793 struct iscsi_cls_conn *conn; 2794 struct nlmsghdr *nlhstat; 2795 struct iscsi_uevent *evstat; 2796 struct iscsi_internal *priv; 2797 int len = nlmsg_total_size(sizeof(*ev) + 2798 sizeof(struct iscsi_stats) + 2799 sizeof(struct iscsi_stats_custom) * 2800 ISCSI_STATS_CUSTOM_MAX); 2801 int err = 0; 2802 2803 priv = iscsi_if_transport_lookup(transport); 2804 if (!priv) 2805 return -EINVAL; 2806 2807 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2808 if (!conn) 2809 return -EEXIST; 2810 2811 do { 2812 int actual_size; 2813 2814 skbstat = alloc_skb(len, GFP_ATOMIC); 2815 if (!skbstat) { 2816 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2817 "deliver stats: OOM\n"); 2818 return -ENOMEM; 2819 } 2820 2821 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2822 (len - sizeof(*nlhstat)), 0); 2823 evstat = nlmsg_data(nlhstat); 2824 memset(evstat, 0, sizeof(*evstat)); 2825 evstat->transport_handle = iscsi_handle(conn->transport); 2826 evstat->type = nlh->nlmsg_type; 2827 evstat->u.get_stats.cid = 2828 ev->u.get_stats.cid; 2829 evstat->u.get_stats.sid = 2830 ev->u.get_stats.sid; 2831 stats = (struct iscsi_stats *) 2832 ((char*)evstat + sizeof(*evstat)); 2833 memset(stats, 0, sizeof(*stats)); 2834 2835 transport->get_stats(conn, stats); 2836 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2837 sizeof(struct iscsi_stats) + 2838 sizeof(struct iscsi_stats_custom) * 2839 stats->custom_length); 2840 actual_size -= sizeof(*nlhstat); 2841 actual_size = nlmsg_msg_size(actual_size); 2842 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2843 nlhstat->nlmsg_len = actual_size; 2844 2845 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2846 GFP_ATOMIC); 2847 } while (err < 0 && err != -ECONNREFUSED); 2848 2849 return err; 2850 } 2851 2852 /** 2853 * iscsi_session_event - send session destr. completion event 2854 * @session: iscsi class session 2855 * @event: type of event 2856 */ 2857 int iscsi_session_event(struct iscsi_cls_session *session, 2858 enum iscsi_uevent_e event) 2859 { 2860 struct iscsi_internal *priv; 2861 struct Scsi_Host *shost; 2862 struct iscsi_uevent *ev; 2863 struct sk_buff *skb; 2864 struct nlmsghdr *nlh; 2865 int rc, len = nlmsg_total_size(sizeof(*ev)); 2866 2867 priv = iscsi_if_transport_lookup(session->transport); 2868 if (!priv) 2869 return -EINVAL; 2870 shost = iscsi_session_to_shost(session); 2871 2872 skb = alloc_skb(len, GFP_KERNEL); 2873 if (!skb) { 2874 iscsi_cls_session_printk(KERN_ERR, session, 2875 "Cannot notify userspace of session " 2876 "event %u\n", event); 2877 return -ENOMEM; 2878 } 2879 2880 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2881 ev = nlmsg_data(nlh); 2882 ev->transport_handle = iscsi_handle(session->transport); 2883 2884 ev->type = event; 2885 switch (event) { 2886 case ISCSI_KEVENT_DESTROY_SESSION: 2887 ev->r.d_session.host_no = shost->host_no; 2888 ev->r.d_session.sid = session->sid; 2889 break; 2890 case ISCSI_KEVENT_CREATE_SESSION: 2891 ev->r.c_session_ret.host_no = shost->host_no; 2892 ev->r.c_session_ret.sid = session->sid; 2893 break; 2894 case ISCSI_KEVENT_UNBIND_SESSION: 2895 ev->r.unbind_session.host_no = shost->host_no; 2896 ev->r.unbind_session.sid = session->sid; 2897 break; 2898 default: 2899 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2900 "%u.\n", event); 2901 kfree_skb(skb); 2902 return -EINVAL; 2903 } 2904 2905 /* 2906 * this will occur if the daemon is not up, so we just warn 2907 * the user and when the daemon is restarted it will handle it 2908 */ 2909 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2910 if (rc == -ESRCH) 2911 iscsi_cls_session_printk(KERN_ERR, session, 2912 "Cannot notify userspace of session " 2913 "event %u. Check iscsi daemon\n", 2914 event); 2915 2916 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2917 event, rc); 2918 return rc; 2919 } 2920 EXPORT_SYMBOL_GPL(iscsi_session_event); 2921 2922 static int 2923 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2924 struct iscsi_uevent *ev, pid_t pid, 2925 uint32_t initial_cmdsn, uint16_t cmds_max, 2926 uint16_t queue_depth) 2927 { 2928 struct iscsi_transport *transport = priv->iscsi_transport; 2929 struct iscsi_cls_session *session; 2930 struct Scsi_Host *shost; 2931 2932 session = transport->create_session(ep, cmds_max, queue_depth, 2933 initial_cmdsn); 2934 if (!session) 2935 return -ENOMEM; 2936 2937 session->creator = pid; 2938 shost = iscsi_session_to_shost(session); 2939 ev->r.c_session_ret.host_no = shost->host_no; 2940 ev->r.c_session_ret.sid = session->sid; 2941 ISCSI_DBG_TRANS_SESSION(session, 2942 "Completed creating transport session\n"); 2943 return 0; 2944 } 2945 2946 static int 2947 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2948 { 2949 struct iscsi_cls_conn *conn; 2950 struct iscsi_cls_session *session; 2951 2952 session = iscsi_session_lookup(ev->u.c_conn.sid); 2953 if (!session) { 2954 printk(KERN_ERR "iscsi: invalid session %d.\n", 2955 ev->u.c_conn.sid); 2956 return -EINVAL; 2957 } 2958 2959 conn = transport->create_conn(session, ev->u.c_conn.cid); 2960 if (!conn) { 2961 iscsi_cls_session_printk(KERN_ERR, session, 2962 "couldn't create a new connection."); 2963 return -ENOMEM; 2964 } 2965 2966 ev->r.c_conn_ret.sid = session->sid; 2967 ev->r.c_conn_ret.cid = conn->cid; 2968 2969 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2970 return 0; 2971 } 2972 2973 static int 2974 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2975 { 2976 struct iscsi_cls_conn *conn; 2977 2978 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2979 if (!conn) 2980 return -EINVAL; 2981 2982 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n"); 2983 flush_work(&conn->cleanup_work); 2984 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2985 2986 if (transport->destroy_conn) 2987 transport->destroy_conn(conn); 2988 return 0; 2989 } 2990 2991 static int 2992 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2993 { 2994 char *data = (char*)ev + sizeof(*ev); 2995 struct iscsi_cls_conn *conn; 2996 struct iscsi_cls_session *session; 2997 int err = 0, value = 0, state; 2998 2999 if (ev->u.set_param.len > PAGE_SIZE) 3000 return -EINVAL; 3001 3002 session = iscsi_session_lookup(ev->u.set_param.sid); 3003 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 3004 if (!conn || !session) 3005 return -EINVAL; 3006 3007 switch (ev->u.set_param.param) { 3008 case ISCSI_PARAM_SESS_RECOVERY_TMO: 3009 sscanf(data, "%d", &value); 3010 if (!session->recovery_tmo_sysfs_override) 3011 session->recovery_tmo = value; 3012 break; 3013 default: 3014 state = READ_ONCE(conn->state); 3015 if (state == ISCSI_CONN_BOUND || state == ISCSI_CONN_UP) { 3016 err = transport->set_param(conn, ev->u.set_param.param, 3017 data, ev->u.set_param.len); 3018 } else { 3019 return -ENOTCONN; 3020 } 3021 } 3022 3023 return err; 3024 } 3025 3026 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 3027 struct iscsi_uevent *ev, int msg_type) 3028 { 3029 struct iscsi_endpoint *ep; 3030 struct sockaddr *dst_addr; 3031 struct Scsi_Host *shost = NULL; 3032 int non_blocking, err = 0; 3033 3034 if (!transport->ep_connect) 3035 return -EINVAL; 3036 3037 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 3038 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 3039 if (!shost) { 3040 printk(KERN_ERR "ep connect failed. Could not find " 3041 "host no %u\n", 3042 ev->u.ep_connect_through_host.host_no); 3043 return -ENODEV; 3044 } 3045 non_blocking = ev->u.ep_connect_through_host.non_blocking; 3046 } else 3047 non_blocking = ev->u.ep_connect.non_blocking; 3048 3049 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3050 ep = transport->ep_connect(shost, dst_addr, non_blocking); 3051 if (IS_ERR(ep)) { 3052 err = PTR_ERR(ep); 3053 goto release_host; 3054 } 3055 3056 ev->r.ep_connect_ret.handle = ep->id; 3057 release_host: 3058 if (shost) 3059 scsi_host_put(shost); 3060 return err; 3061 } 3062 3063 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 3064 u64 ep_handle) 3065 { 3066 struct iscsi_cls_conn *conn; 3067 struct iscsi_endpoint *ep; 3068 3069 if (!transport->ep_disconnect) 3070 return -EINVAL; 3071 3072 ep = iscsi_lookup_endpoint(ep_handle); 3073 if (!ep) 3074 return -EINVAL; 3075 3076 conn = ep->conn; 3077 if (!conn) { 3078 /* 3079 * conn was not even bound yet, so we can't get iscsi conn 3080 * failures yet. 3081 */ 3082 transport->ep_disconnect(ep); 3083 goto put_ep; 3084 } 3085 3086 mutex_lock(&conn->ep_mutex); 3087 iscsi_if_disconnect_bound_ep(conn, ep, false); 3088 mutex_unlock(&conn->ep_mutex); 3089 put_ep: 3090 iscsi_put_endpoint(ep); 3091 return 0; 3092 } 3093 3094 static int 3095 iscsi_if_transport_ep(struct iscsi_transport *transport, 3096 struct iscsi_uevent *ev, int msg_type) 3097 { 3098 struct iscsi_endpoint *ep; 3099 int rc = 0; 3100 3101 switch (msg_type) { 3102 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3103 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3104 rc = iscsi_if_ep_connect(transport, ev, msg_type); 3105 break; 3106 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3107 if (!transport->ep_poll) 3108 return -EINVAL; 3109 3110 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 3111 if (!ep) 3112 return -EINVAL; 3113 3114 ev->r.retcode = transport->ep_poll(ep, 3115 ev->u.ep_poll.timeout_ms); 3116 iscsi_put_endpoint(ep); 3117 break; 3118 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3119 rc = iscsi_if_ep_disconnect(transport, 3120 ev->u.ep_disconnect.ep_handle); 3121 break; 3122 } 3123 return rc; 3124 } 3125 3126 static int 3127 iscsi_tgt_dscvr(struct iscsi_transport *transport, 3128 struct iscsi_uevent *ev) 3129 { 3130 struct Scsi_Host *shost; 3131 struct sockaddr *dst_addr; 3132 int err; 3133 3134 if (!transport->tgt_dscvr) 3135 return -EINVAL; 3136 3137 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3138 if (!shost) { 3139 printk(KERN_ERR "target discovery could not find host no %u\n", 3140 ev->u.tgt_dscvr.host_no); 3141 return -ENODEV; 3142 } 3143 3144 3145 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3146 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3147 ev->u.tgt_dscvr.enable, dst_addr); 3148 scsi_host_put(shost); 3149 return err; 3150 } 3151 3152 static int 3153 iscsi_set_host_param(struct iscsi_transport *transport, 3154 struct iscsi_uevent *ev) 3155 { 3156 char *data = (char*)ev + sizeof(*ev); 3157 struct Scsi_Host *shost; 3158 int err; 3159 3160 if (!transport->set_host_param) 3161 return -ENOSYS; 3162 3163 if (ev->u.set_host_param.len > PAGE_SIZE) 3164 return -EINVAL; 3165 3166 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3167 if (!shost) { 3168 printk(KERN_ERR "set_host_param could not find host no %u\n", 3169 ev->u.set_host_param.host_no); 3170 return -ENODEV; 3171 } 3172 3173 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3174 data, ev->u.set_host_param.len); 3175 scsi_host_put(shost); 3176 return err; 3177 } 3178 3179 static int 3180 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3181 { 3182 struct Scsi_Host *shost; 3183 struct iscsi_path *params; 3184 int err; 3185 3186 if (!transport->set_path) 3187 return -ENOSYS; 3188 3189 shost = scsi_host_lookup(ev->u.set_path.host_no); 3190 if (!shost) { 3191 printk(KERN_ERR "set path could not find host no %u\n", 3192 ev->u.set_path.host_no); 3193 return -ENODEV; 3194 } 3195 3196 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3197 err = transport->set_path(shost, params); 3198 3199 scsi_host_put(shost); 3200 return err; 3201 } 3202 3203 static int iscsi_session_has_conns(int sid) 3204 { 3205 struct iscsi_cls_conn *conn; 3206 unsigned long flags; 3207 int found = 0; 3208 3209 spin_lock_irqsave(&connlock, flags); 3210 list_for_each_entry(conn, &connlist, conn_list) { 3211 if (iscsi_conn_get_sid(conn) == sid) { 3212 found = 1; 3213 break; 3214 } 3215 } 3216 spin_unlock_irqrestore(&connlock, flags); 3217 3218 return found; 3219 } 3220 3221 static int 3222 iscsi_set_iface_params(struct iscsi_transport *transport, 3223 struct iscsi_uevent *ev, uint32_t len) 3224 { 3225 char *data = (char *)ev + sizeof(*ev); 3226 struct Scsi_Host *shost; 3227 int err; 3228 3229 if (!transport->set_iface_param) 3230 return -ENOSYS; 3231 3232 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3233 if (!shost) { 3234 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3235 ev->u.set_iface_params.host_no); 3236 return -ENODEV; 3237 } 3238 3239 err = transport->set_iface_param(shost, data, len); 3240 scsi_host_put(shost); 3241 return err; 3242 } 3243 3244 static int 3245 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3246 { 3247 struct Scsi_Host *shost; 3248 struct sockaddr *dst_addr; 3249 int err; 3250 3251 if (!transport->send_ping) 3252 return -ENOSYS; 3253 3254 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3255 if (!shost) { 3256 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3257 ev->u.iscsi_ping.host_no); 3258 return -ENODEV; 3259 } 3260 3261 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3262 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3263 ev->u.iscsi_ping.iface_type, 3264 ev->u.iscsi_ping.payload_size, 3265 ev->u.iscsi_ping.pid, 3266 dst_addr); 3267 scsi_host_put(shost); 3268 return err; 3269 } 3270 3271 static int 3272 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3273 { 3274 struct iscsi_uevent *ev = nlmsg_data(nlh); 3275 struct Scsi_Host *shost = NULL; 3276 struct iscsi_chap_rec *chap_rec; 3277 struct iscsi_internal *priv; 3278 struct sk_buff *skbchap; 3279 struct nlmsghdr *nlhchap; 3280 struct iscsi_uevent *evchap; 3281 uint32_t chap_buf_size; 3282 int len, err = 0; 3283 char *buf; 3284 3285 if (!transport->get_chap) 3286 return -EINVAL; 3287 3288 priv = iscsi_if_transport_lookup(transport); 3289 if (!priv) 3290 return -EINVAL; 3291 3292 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3293 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3294 3295 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3296 if (!shost) { 3297 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3298 __func__, ev->u.get_chap.host_no); 3299 return -ENODEV; 3300 } 3301 3302 do { 3303 int actual_size; 3304 3305 skbchap = alloc_skb(len, GFP_KERNEL); 3306 if (!skbchap) { 3307 printk(KERN_ERR "can not deliver chap: OOM\n"); 3308 err = -ENOMEM; 3309 goto exit_get_chap; 3310 } 3311 3312 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3313 (len - sizeof(*nlhchap)), 0); 3314 evchap = nlmsg_data(nlhchap); 3315 memset(evchap, 0, sizeof(*evchap)); 3316 evchap->transport_handle = iscsi_handle(transport); 3317 evchap->type = nlh->nlmsg_type; 3318 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3319 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3320 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3321 buf = (char *)evchap + sizeof(*evchap); 3322 memset(buf, 0, chap_buf_size); 3323 3324 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3325 &evchap->u.get_chap.num_entries, buf); 3326 3327 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3328 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3329 nlhchap->nlmsg_len = actual_size; 3330 3331 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3332 GFP_KERNEL); 3333 } while (err < 0 && err != -ECONNREFUSED); 3334 3335 exit_get_chap: 3336 scsi_host_put(shost); 3337 return err; 3338 } 3339 3340 static int iscsi_set_chap(struct iscsi_transport *transport, 3341 struct iscsi_uevent *ev, uint32_t len) 3342 { 3343 char *data = (char *)ev + sizeof(*ev); 3344 struct Scsi_Host *shost; 3345 int err = 0; 3346 3347 if (!transport->set_chap) 3348 return -ENOSYS; 3349 3350 shost = scsi_host_lookup(ev->u.set_path.host_no); 3351 if (!shost) { 3352 pr_err("%s could not find host no %u\n", 3353 __func__, ev->u.set_path.host_no); 3354 return -ENODEV; 3355 } 3356 3357 err = transport->set_chap(shost, data, len); 3358 scsi_host_put(shost); 3359 return err; 3360 } 3361 3362 static int iscsi_delete_chap(struct iscsi_transport *transport, 3363 struct iscsi_uevent *ev) 3364 { 3365 struct Scsi_Host *shost; 3366 int err = 0; 3367 3368 if (!transport->delete_chap) 3369 return -ENOSYS; 3370 3371 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3372 if (!shost) { 3373 printk(KERN_ERR "%s could not find host no %u\n", 3374 __func__, ev->u.delete_chap.host_no); 3375 return -ENODEV; 3376 } 3377 3378 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3379 scsi_host_put(shost); 3380 return err; 3381 } 3382 3383 static const struct { 3384 enum iscsi_discovery_parent_type value; 3385 char *name; 3386 } iscsi_discovery_parent_names[] = { 3387 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3388 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3389 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3390 }; 3391 3392 char *iscsi_get_discovery_parent_name(int parent_type) 3393 { 3394 int i; 3395 char *state = "Unknown!"; 3396 3397 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3398 if (iscsi_discovery_parent_names[i].value & parent_type) { 3399 state = iscsi_discovery_parent_names[i].name; 3400 break; 3401 } 3402 } 3403 return state; 3404 } 3405 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3406 3407 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3408 struct iscsi_uevent *ev, uint32_t len) 3409 { 3410 char *data = (char *)ev + sizeof(*ev); 3411 struct Scsi_Host *shost; 3412 struct iscsi_bus_flash_session *fnode_sess; 3413 struct iscsi_bus_flash_conn *fnode_conn; 3414 struct device *dev; 3415 uint32_t idx; 3416 int err = 0; 3417 3418 if (!transport->set_flashnode_param) { 3419 err = -ENOSYS; 3420 goto exit_set_fnode; 3421 } 3422 3423 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3424 if (!shost) { 3425 pr_err("%s could not find host no %u\n", 3426 __func__, ev->u.set_flashnode.host_no); 3427 err = -ENODEV; 3428 goto exit_set_fnode; 3429 } 3430 3431 idx = ev->u.set_flashnode.flashnode_idx; 3432 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3433 if (!fnode_sess) { 3434 pr_err("%s could not find flashnode %u for host no %u\n", 3435 __func__, idx, ev->u.set_flashnode.host_no); 3436 err = -ENODEV; 3437 goto put_host; 3438 } 3439 3440 dev = iscsi_find_flashnode_conn(fnode_sess); 3441 if (!dev) { 3442 err = -ENODEV; 3443 goto put_sess; 3444 } 3445 3446 fnode_conn = iscsi_dev_to_flash_conn(dev); 3447 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3448 put_device(dev); 3449 3450 put_sess: 3451 put_device(&fnode_sess->dev); 3452 3453 put_host: 3454 scsi_host_put(shost); 3455 3456 exit_set_fnode: 3457 return err; 3458 } 3459 3460 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3461 struct iscsi_uevent *ev, uint32_t len) 3462 { 3463 char *data = (char *)ev + sizeof(*ev); 3464 struct Scsi_Host *shost; 3465 int index; 3466 int err = 0; 3467 3468 if (!transport->new_flashnode) { 3469 err = -ENOSYS; 3470 goto exit_new_fnode; 3471 } 3472 3473 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3474 if (!shost) { 3475 pr_err("%s could not find host no %u\n", 3476 __func__, ev->u.new_flashnode.host_no); 3477 err = -ENODEV; 3478 goto put_host; 3479 } 3480 3481 index = transport->new_flashnode(shost, data, len); 3482 3483 if (index >= 0) 3484 ev->r.new_flashnode_ret.flashnode_idx = index; 3485 else 3486 err = -EIO; 3487 3488 put_host: 3489 scsi_host_put(shost); 3490 3491 exit_new_fnode: 3492 return err; 3493 } 3494 3495 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3496 struct iscsi_uevent *ev) 3497 { 3498 struct Scsi_Host *shost; 3499 struct iscsi_bus_flash_session *fnode_sess; 3500 uint32_t idx; 3501 int err = 0; 3502 3503 if (!transport->del_flashnode) { 3504 err = -ENOSYS; 3505 goto exit_del_fnode; 3506 } 3507 3508 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3509 if (!shost) { 3510 pr_err("%s could not find host no %u\n", 3511 __func__, ev->u.del_flashnode.host_no); 3512 err = -ENODEV; 3513 goto put_host; 3514 } 3515 3516 idx = ev->u.del_flashnode.flashnode_idx; 3517 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3518 if (!fnode_sess) { 3519 pr_err("%s could not find flashnode %u for host no %u\n", 3520 __func__, idx, ev->u.del_flashnode.host_no); 3521 err = -ENODEV; 3522 goto put_host; 3523 } 3524 3525 err = transport->del_flashnode(fnode_sess); 3526 put_device(&fnode_sess->dev); 3527 3528 put_host: 3529 scsi_host_put(shost); 3530 3531 exit_del_fnode: 3532 return err; 3533 } 3534 3535 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3536 struct iscsi_uevent *ev) 3537 { 3538 struct Scsi_Host *shost; 3539 struct iscsi_bus_flash_session *fnode_sess; 3540 struct iscsi_bus_flash_conn *fnode_conn; 3541 struct device *dev; 3542 uint32_t idx; 3543 int err = 0; 3544 3545 if (!transport->login_flashnode) { 3546 err = -ENOSYS; 3547 goto exit_login_fnode; 3548 } 3549 3550 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3551 if (!shost) { 3552 pr_err("%s could not find host no %u\n", 3553 __func__, ev->u.login_flashnode.host_no); 3554 err = -ENODEV; 3555 goto put_host; 3556 } 3557 3558 idx = ev->u.login_flashnode.flashnode_idx; 3559 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3560 if (!fnode_sess) { 3561 pr_err("%s could not find flashnode %u for host no %u\n", 3562 __func__, idx, ev->u.login_flashnode.host_no); 3563 err = -ENODEV; 3564 goto put_host; 3565 } 3566 3567 dev = iscsi_find_flashnode_conn(fnode_sess); 3568 if (!dev) { 3569 err = -ENODEV; 3570 goto put_sess; 3571 } 3572 3573 fnode_conn = iscsi_dev_to_flash_conn(dev); 3574 err = transport->login_flashnode(fnode_sess, fnode_conn); 3575 put_device(dev); 3576 3577 put_sess: 3578 put_device(&fnode_sess->dev); 3579 3580 put_host: 3581 scsi_host_put(shost); 3582 3583 exit_login_fnode: 3584 return err; 3585 } 3586 3587 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3588 struct iscsi_uevent *ev) 3589 { 3590 struct Scsi_Host *shost; 3591 struct iscsi_bus_flash_session *fnode_sess; 3592 struct iscsi_bus_flash_conn *fnode_conn; 3593 struct device *dev; 3594 uint32_t idx; 3595 int err = 0; 3596 3597 if (!transport->logout_flashnode) { 3598 err = -ENOSYS; 3599 goto exit_logout_fnode; 3600 } 3601 3602 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3603 if (!shost) { 3604 pr_err("%s could not find host no %u\n", 3605 __func__, ev->u.logout_flashnode.host_no); 3606 err = -ENODEV; 3607 goto put_host; 3608 } 3609 3610 idx = ev->u.logout_flashnode.flashnode_idx; 3611 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3612 if (!fnode_sess) { 3613 pr_err("%s could not find flashnode %u for host no %u\n", 3614 __func__, idx, ev->u.logout_flashnode.host_no); 3615 err = -ENODEV; 3616 goto put_host; 3617 } 3618 3619 dev = iscsi_find_flashnode_conn(fnode_sess); 3620 if (!dev) { 3621 err = -ENODEV; 3622 goto put_sess; 3623 } 3624 3625 fnode_conn = iscsi_dev_to_flash_conn(dev); 3626 3627 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3628 put_device(dev); 3629 3630 put_sess: 3631 put_device(&fnode_sess->dev); 3632 3633 put_host: 3634 scsi_host_put(shost); 3635 3636 exit_logout_fnode: 3637 return err; 3638 } 3639 3640 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3641 struct iscsi_uevent *ev) 3642 { 3643 struct Scsi_Host *shost; 3644 struct iscsi_cls_session *session; 3645 int err = 0; 3646 3647 if (!transport->logout_flashnode_sid) { 3648 err = -ENOSYS; 3649 goto exit_logout_sid; 3650 } 3651 3652 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3653 if (!shost) { 3654 pr_err("%s could not find host no %u\n", 3655 __func__, ev->u.logout_flashnode.host_no); 3656 err = -ENODEV; 3657 goto put_host; 3658 } 3659 3660 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3661 if (!session) { 3662 pr_err("%s could not find session id %u\n", 3663 __func__, ev->u.logout_flashnode_sid.sid); 3664 err = -EINVAL; 3665 goto put_host; 3666 } 3667 3668 err = transport->logout_flashnode_sid(session); 3669 3670 put_host: 3671 scsi_host_put(shost); 3672 3673 exit_logout_sid: 3674 return err; 3675 } 3676 3677 static int 3678 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3679 { 3680 struct iscsi_uevent *ev = nlmsg_data(nlh); 3681 struct Scsi_Host *shost = NULL; 3682 struct iscsi_internal *priv; 3683 struct sk_buff *skbhost_stats; 3684 struct nlmsghdr *nlhhost_stats; 3685 struct iscsi_uevent *evhost_stats; 3686 int host_stats_size = 0; 3687 int len, err = 0; 3688 char *buf; 3689 3690 if (!transport->get_host_stats) 3691 return -ENOSYS; 3692 3693 priv = iscsi_if_transport_lookup(transport); 3694 if (!priv) 3695 return -EINVAL; 3696 3697 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3698 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3699 3700 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3701 if (!shost) { 3702 pr_err("%s: failed. Could not find host no %u\n", 3703 __func__, ev->u.get_host_stats.host_no); 3704 return -ENODEV; 3705 } 3706 3707 do { 3708 int actual_size; 3709 3710 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3711 if (!skbhost_stats) { 3712 pr_err("cannot deliver host stats: OOM\n"); 3713 err = -ENOMEM; 3714 goto exit_host_stats; 3715 } 3716 3717 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3718 (len - sizeof(*nlhhost_stats)), 0); 3719 evhost_stats = nlmsg_data(nlhhost_stats); 3720 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3721 evhost_stats->transport_handle = iscsi_handle(transport); 3722 evhost_stats->type = nlh->nlmsg_type; 3723 evhost_stats->u.get_host_stats.host_no = 3724 ev->u.get_host_stats.host_no; 3725 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3726 memset(buf, 0, host_stats_size); 3727 3728 err = transport->get_host_stats(shost, buf, host_stats_size); 3729 if (err) { 3730 kfree_skb(skbhost_stats); 3731 goto exit_host_stats; 3732 } 3733 3734 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3735 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3736 nlhhost_stats->nlmsg_len = actual_size; 3737 3738 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3739 GFP_KERNEL); 3740 } while (err < 0 && err != -ECONNREFUSED); 3741 3742 exit_host_stats: 3743 scsi_host_put(shost); 3744 return err; 3745 } 3746 3747 static int iscsi_if_transport_conn(struct iscsi_transport *transport, 3748 struct nlmsghdr *nlh) 3749 { 3750 struct iscsi_uevent *ev = nlmsg_data(nlh); 3751 struct iscsi_cls_session *session; 3752 struct iscsi_cls_conn *conn = NULL; 3753 struct iscsi_endpoint *ep; 3754 uint32_t pdu_len; 3755 int err = 0; 3756 3757 switch (nlh->nlmsg_type) { 3758 case ISCSI_UEVENT_CREATE_CONN: 3759 return iscsi_if_create_conn(transport, ev); 3760 case ISCSI_UEVENT_DESTROY_CONN: 3761 return iscsi_if_destroy_conn(transport, ev); 3762 case ISCSI_UEVENT_STOP_CONN: 3763 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, 3764 ev->u.stop_conn.cid); 3765 if (!conn) 3766 return -EINVAL; 3767 3768 return iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3769 } 3770 3771 /* 3772 * The following cmds need to be run under the ep_mutex so in kernel 3773 * conn cleanup (ep_disconnect + unbind and conn) is not done while 3774 * these are running. They also must not run if we have just run a conn 3775 * cleanup because they would set the state in a way that might allow 3776 * IO or send IO themselves. 3777 */ 3778 switch (nlh->nlmsg_type) { 3779 case ISCSI_UEVENT_START_CONN: 3780 conn = iscsi_conn_lookup(ev->u.start_conn.sid, 3781 ev->u.start_conn.cid); 3782 break; 3783 case ISCSI_UEVENT_BIND_CONN: 3784 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3785 break; 3786 case ISCSI_UEVENT_SEND_PDU: 3787 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3788 break; 3789 } 3790 3791 if (!conn) 3792 return -EINVAL; 3793 3794 mutex_lock(&conn->ep_mutex); 3795 spin_lock_irq(&conn->lock); 3796 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 3797 spin_unlock_irq(&conn->lock); 3798 mutex_unlock(&conn->ep_mutex); 3799 ev->r.retcode = -ENOTCONN; 3800 return 0; 3801 } 3802 spin_unlock_irq(&conn->lock); 3803 3804 switch (nlh->nlmsg_type) { 3805 case ISCSI_UEVENT_BIND_CONN: 3806 session = iscsi_session_lookup(ev->u.b_conn.sid); 3807 if (!session) { 3808 err = -EINVAL; 3809 break; 3810 } 3811 3812 ev->r.retcode = transport->bind_conn(session, conn, 3813 ev->u.b_conn.transport_eph, 3814 ev->u.b_conn.is_leading); 3815 if (!ev->r.retcode) 3816 WRITE_ONCE(conn->state, ISCSI_CONN_BOUND); 3817 3818 if (ev->r.retcode || !transport->ep_connect) 3819 break; 3820 3821 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3822 if (ep) { 3823 ep->conn = conn; 3824 conn->ep = ep; 3825 iscsi_put_endpoint(ep); 3826 } else { 3827 err = -ENOTCONN; 3828 iscsi_cls_conn_printk(KERN_ERR, conn, 3829 "Could not set ep conn binding\n"); 3830 } 3831 break; 3832 case ISCSI_UEVENT_START_CONN: 3833 ev->r.retcode = transport->start_conn(conn); 3834 if (!ev->r.retcode) 3835 WRITE_ONCE(conn->state, ISCSI_CONN_UP); 3836 3837 break; 3838 case ISCSI_UEVENT_SEND_PDU: 3839 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev); 3840 3841 if ((ev->u.send_pdu.hdr_size > pdu_len) || 3842 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) { 3843 err = -EINVAL; 3844 break; 3845 } 3846 3847 ev->r.retcode = transport->send_pdu(conn, 3848 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)), 3849 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3850 ev->u.send_pdu.data_size); 3851 break; 3852 default: 3853 err = -ENOSYS; 3854 } 3855 3856 mutex_unlock(&conn->ep_mutex); 3857 return err; 3858 } 3859 3860 static int 3861 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3862 { 3863 int err = 0; 3864 u32 portid; 3865 struct iscsi_uevent *ev = nlmsg_data(nlh); 3866 struct iscsi_transport *transport = NULL; 3867 struct iscsi_internal *priv; 3868 struct iscsi_cls_session *session; 3869 struct iscsi_endpoint *ep = NULL; 3870 3871 if (!netlink_capable(skb, CAP_SYS_ADMIN)) 3872 return -EPERM; 3873 3874 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3875 *group = ISCSI_NL_GRP_UIP; 3876 else 3877 *group = ISCSI_NL_GRP_ISCSID; 3878 3879 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3880 if (!priv) 3881 return -EINVAL; 3882 transport = priv->iscsi_transport; 3883 3884 if (!try_module_get(transport->owner)) 3885 return -EINVAL; 3886 3887 portid = NETLINK_CB(skb).portid; 3888 3889 switch (nlh->nlmsg_type) { 3890 case ISCSI_UEVENT_CREATE_SESSION: 3891 err = iscsi_if_create_session(priv, ep, ev, 3892 portid, 3893 ev->u.c_session.initial_cmdsn, 3894 ev->u.c_session.cmds_max, 3895 ev->u.c_session.queue_depth); 3896 break; 3897 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3898 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3899 if (!ep) { 3900 err = -EINVAL; 3901 break; 3902 } 3903 3904 err = iscsi_if_create_session(priv, ep, ev, 3905 portid, 3906 ev->u.c_bound_session.initial_cmdsn, 3907 ev->u.c_bound_session.cmds_max, 3908 ev->u.c_bound_session.queue_depth); 3909 iscsi_put_endpoint(ep); 3910 break; 3911 case ISCSI_UEVENT_DESTROY_SESSION: 3912 session = iscsi_session_lookup(ev->u.d_session.sid); 3913 if (!session) 3914 err = -EINVAL; 3915 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3916 err = -EBUSY; 3917 else 3918 transport->destroy_session(session); 3919 break; 3920 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3921 session = iscsi_session_lookup(ev->u.d_session.sid); 3922 if (!session) 3923 err = -EINVAL; 3924 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3925 err = -EBUSY; 3926 else { 3927 unsigned long flags; 3928 3929 /* Prevent this session from being found again */ 3930 spin_lock_irqsave(&sesslock, flags); 3931 list_del_init(&session->sess_list); 3932 spin_unlock_irqrestore(&sesslock, flags); 3933 3934 queue_work(system_unbound_wq, &session->destroy_work); 3935 } 3936 break; 3937 case ISCSI_UEVENT_UNBIND_SESSION: 3938 session = iscsi_session_lookup(ev->u.d_session.sid); 3939 if (session) 3940 queue_work(session->workq, &session->unbind_work); 3941 else 3942 err = -EINVAL; 3943 break; 3944 case ISCSI_UEVENT_SET_PARAM: 3945 err = iscsi_set_param(transport, ev); 3946 break; 3947 case ISCSI_UEVENT_CREATE_CONN: 3948 case ISCSI_UEVENT_DESTROY_CONN: 3949 case ISCSI_UEVENT_STOP_CONN: 3950 case ISCSI_UEVENT_START_CONN: 3951 case ISCSI_UEVENT_BIND_CONN: 3952 case ISCSI_UEVENT_SEND_PDU: 3953 err = iscsi_if_transport_conn(transport, nlh); 3954 break; 3955 case ISCSI_UEVENT_GET_STATS: 3956 err = iscsi_if_get_stats(transport, nlh); 3957 break; 3958 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3959 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3960 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3961 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3962 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3963 break; 3964 case ISCSI_UEVENT_TGT_DSCVR: 3965 err = iscsi_tgt_dscvr(transport, ev); 3966 break; 3967 case ISCSI_UEVENT_SET_HOST_PARAM: 3968 err = iscsi_set_host_param(transport, ev); 3969 break; 3970 case ISCSI_UEVENT_PATH_UPDATE: 3971 err = iscsi_set_path(transport, ev); 3972 break; 3973 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3974 err = iscsi_set_iface_params(transport, ev, 3975 nlmsg_attrlen(nlh, sizeof(*ev))); 3976 break; 3977 case ISCSI_UEVENT_PING: 3978 err = iscsi_send_ping(transport, ev); 3979 break; 3980 case ISCSI_UEVENT_GET_CHAP: 3981 err = iscsi_get_chap(transport, nlh); 3982 break; 3983 case ISCSI_UEVENT_DELETE_CHAP: 3984 err = iscsi_delete_chap(transport, ev); 3985 break; 3986 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3987 err = iscsi_set_flashnode_param(transport, ev, 3988 nlmsg_attrlen(nlh, 3989 sizeof(*ev))); 3990 break; 3991 case ISCSI_UEVENT_NEW_FLASHNODE: 3992 err = iscsi_new_flashnode(transport, ev, 3993 nlmsg_attrlen(nlh, sizeof(*ev))); 3994 break; 3995 case ISCSI_UEVENT_DEL_FLASHNODE: 3996 err = iscsi_del_flashnode(transport, ev); 3997 break; 3998 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3999 err = iscsi_login_flashnode(transport, ev); 4000 break; 4001 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 4002 err = iscsi_logout_flashnode(transport, ev); 4003 break; 4004 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 4005 err = iscsi_logout_flashnode_sid(transport, ev); 4006 break; 4007 case ISCSI_UEVENT_SET_CHAP: 4008 err = iscsi_set_chap(transport, ev, 4009 nlmsg_attrlen(nlh, sizeof(*ev))); 4010 break; 4011 case ISCSI_UEVENT_GET_HOST_STATS: 4012 err = iscsi_get_host_stats(transport, nlh); 4013 break; 4014 default: 4015 err = -ENOSYS; 4016 break; 4017 } 4018 4019 module_put(transport->owner); 4020 return err; 4021 } 4022 4023 /* 4024 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 4025 * Malformed skbs with wrong lengths or invalid creds are not processed. 4026 */ 4027 static void 4028 iscsi_if_rx(struct sk_buff *skb) 4029 { 4030 u32 portid = NETLINK_CB(skb).portid; 4031 4032 mutex_lock(&rx_queue_mutex); 4033 while (skb->len >= NLMSG_HDRLEN) { 4034 int err; 4035 uint32_t rlen; 4036 struct nlmsghdr *nlh; 4037 struct iscsi_uevent *ev; 4038 uint32_t group; 4039 int retries = ISCSI_SEND_MAX_ALLOWED; 4040 4041 nlh = nlmsg_hdr(skb); 4042 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 4043 skb->len < nlh->nlmsg_len) { 4044 break; 4045 } 4046 4047 ev = nlmsg_data(nlh); 4048 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 4049 if (rlen > skb->len) 4050 rlen = skb->len; 4051 4052 err = iscsi_if_recv_msg(skb, nlh, &group); 4053 if (err) { 4054 ev->type = ISCSI_KEVENT_IF_ERROR; 4055 ev->iferror = err; 4056 } 4057 do { 4058 /* 4059 * special case for GET_STATS: 4060 * on success - sending reply and stats from 4061 * inside of if_recv_msg(), 4062 * on error - fall through. 4063 */ 4064 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 4065 break; 4066 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 4067 break; 4068 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 4069 ev, sizeof(*ev)); 4070 if (err == -EAGAIN && --retries < 0) { 4071 printk(KERN_WARNING "Send reply failed, error %d\n", err); 4072 break; 4073 } 4074 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 4075 skb_pull(skb, rlen); 4076 } 4077 mutex_unlock(&rx_queue_mutex); 4078 } 4079 4080 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 4081 struct device_attribute dev_attr_##_prefix##_##_name = \ 4082 __ATTR(_name,_mode,_show,_store) 4083 4084 /* 4085 * iSCSI connection attrs 4086 */ 4087 #define iscsi_conn_attr_show(param) \ 4088 static ssize_t \ 4089 show_conn_param_##param(struct device *dev, \ 4090 struct device_attribute *attr, char *buf) \ 4091 { \ 4092 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4093 struct iscsi_transport *t = conn->transport; \ 4094 return t->get_conn_param(conn, param, buf); \ 4095 } 4096 4097 #define iscsi_conn_attr(field, param) \ 4098 iscsi_conn_attr_show(param) \ 4099 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 4100 NULL); 4101 4102 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 4103 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 4104 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 4105 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 4106 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 4107 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 4108 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 4109 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 4110 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 4111 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 4112 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 4113 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 4114 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 4115 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 4116 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 4117 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 4118 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 4119 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 4120 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 4121 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 4122 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 4123 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 4124 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 4125 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 4126 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 4127 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 4128 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 4129 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 4130 4131 static const char *const connection_state_names[] = { 4132 [ISCSI_CONN_UP] = "up", 4133 [ISCSI_CONN_DOWN] = "down", 4134 [ISCSI_CONN_FAILED] = "failed", 4135 [ISCSI_CONN_BOUND] = "bound" 4136 }; 4137 4138 static ssize_t show_conn_state(struct device *dev, 4139 struct device_attribute *attr, char *buf) 4140 { 4141 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 4142 const char *state = "unknown"; 4143 int conn_state = READ_ONCE(conn->state); 4144 4145 if (conn_state >= 0 && 4146 conn_state < ARRAY_SIZE(connection_state_names)) 4147 state = connection_state_names[conn_state]; 4148 4149 return sysfs_emit(buf, "%s\n", state); 4150 } 4151 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 4152 NULL); 4153 4154 #define iscsi_conn_ep_attr_show(param) \ 4155 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 4156 struct device_attribute *attr,\ 4157 char *buf) \ 4158 { \ 4159 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4160 struct iscsi_transport *t = conn->transport; \ 4161 struct iscsi_endpoint *ep; \ 4162 ssize_t rc; \ 4163 \ 4164 /* \ 4165 * Need to make sure ep_disconnect does not free the LLD's \ 4166 * interconnect resources while we are trying to read them. \ 4167 */ \ 4168 mutex_lock(&conn->ep_mutex); \ 4169 ep = conn->ep; \ 4170 if (!ep && t->ep_connect) { \ 4171 mutex_unlock(&conn->ep_mutex); \ 4172 return -ENOTCONN; \ 4173 } \ 4174 \ 4175 if (ep) \ 4176 rc = t->get_ep_param(ep, param, buf); \ 4177 else \ 4178 rc = t->get_conn_param(conn, param, buf); \ 4179 mutex_unlock(&conn->ep_mutex); \ 4180 return rc; \ 4181 } 4182 4183 #define iscsi_conn_ep_attr(field, param) \ 4184 iscsi_conn_ep_attr_show(param) \ 4185 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4186 show_conn_ep_param_##param, NULL); 4187 4188 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4189 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4190 4191 static struct attribute *iscsi_conn_attrs[] = { 4192 &dev_attr_conn_max_recv_dlength.attr, 4193 &dev_attr_conn_max_xmit_dlength.attr, 4194 &dev_attr_conn_header_digest.attr, 4195 &dev_attr_conn_data_digest.attr, 4196 &dev_attr_conn_ifmarker.attr, 4197 &dev_attr_conn_ofmarker.attr, 4198 &dev_attr_conn_address.attr, 4199 &dev_attr_conn_port.attr, 4200 &dev_attr_conn_exp_statsn.attr, 4201 &dev_attr_conn_persistent_address.attr, 4202 &dev_attr_conn_persistent_port.attr, 4203 &dev_attr_conn_ping_tmo.attr, 4204 &dev_attr_conn_recv_tmo.attr, 4205 &dev_attr_conn_local_port.attr, 4206 &dev_attr_conn_statsn.attr, 4207 &dev_attr_conn_keepalive_tmo.attr, 4208 &dev_attr_conn_max_segment_size.attr, 4209 &dev_attr_conn_tcp_timestamp_stat.attr, 4210 &dev_attr_conn_tcp_wsf_disable.attr, 4211 &dev_attr_conn_tcp_nagle_disable.attr, 4212 &dev_attr_conn_tcp_timer_scale.attr, 4213 &dev_attr_conn_tcp_timestamp_enable.attr, 4214 &dev_attr_conn_fragment_disable.attr, 4215 &dev_attr_conn_ipv4_tos.attr, 4216 &dev_attr_conn_ipv6_traffic_class.attr, 4217 &dev_attr_conn_ipv6_flow_label.attr, 4218 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4219 &dev_attr_conn_tcp_xmit_wsf.attr, 4220 &dev_attr_conn_tcp_recv_wsf.attr, 4221 &dev_attr_conn_local_ipaddr.attr, 4222 &dev_attr_conn_state.attr, 4223 NULL, 4224 }; 4225 4226 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4227 struct attribute *attr, int i) 4228 { 4229 struct device *cdev = container_of(kobj, struct device, kobj); 4230 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4231 struct iscsi_transport *t = conn->transport; 4232 int param; 4233 4234 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4235 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4236 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4237 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4238 else if (attr == &dev_attr_conn_header_digest.attr) 4239 param = ISCSI_PARAM_HDRDGST_EN; 4240 else if (attr == &dev_attr_conn_data_digest.attr) 4241 param = ISCSI_PARAM_DATADGST_EN; 4242 else if (attr == &dev_attr_conn_ifmarker.attr) 4243 param = ISCSI_PARAM_IFMARKER_EN; 4244 else if (attr == &dev_attr_conn_ofmarker.attr) 4245 param = ISCSI_PARAM_OFMARKER_EN; 4246 else if (attr == &dev_attr_conn_address.attr) 4247 param = ISCSI_PARAM_CONN_ADDRESS; 4248 else if (attr == &dev_attr_conn_port.attr) 4249 param = ISCSI_PARAM_CONN_PORT; 4250 else if (attr == &dev_attr_conn_exp_statsn.attr) 4251 param = ISCSI_PARAM_EXP_STATSN; 4252 else if (attr == &dev_attr_conn_persistent_address.attr) 4253 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4254 else if (attr == &dev_attr_conn_persistent_port.attr) 4255 param = ISCSI_PARAM_PERSISTENT_PORT; 4256 else if (attr == &dev_attr_conn_ping_tmo.attr) 4257 param = ISCSI_PARAM_PING_TMO; 4258 else if (attr == &dev_attr_conn_recv_tmo.attr) 4259 param = ISCSI_PARAM_RECV_TMO; 4260 else if (attr == &dev_attr_conn_local_port.attr) 4261 param = ISCSI_PARAM_LOCAL_PORT; 4262 else if (attr == &dev_attr_conn_statsn.attr) 4263 param = ISCSI_PARAM_STATSN; 4264 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4265 param = ISCSI_PARAM_KEEPALIVE_TMO; 4266 else if (attr == &dev_attr_conn_max_segment_size.attr) 4267 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4268 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4269 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4270 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4271 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4272 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4273 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4274 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4275 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4276 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4277 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4278 else if (attr == &dev_attr_conn_fragment_disable.attr) 4279 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4280 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4281 param = ISCSI_PARAM_IPV4_TOS; 4282 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4283 param = ISCSI_PARAM_IPV6_TC; 4284 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4285 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4286 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4287 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4288 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4289 param = ISCSI_PARAM_TCP_XMIT_WSF; 4290 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4291 param = ISCSI_PARAM_TCP_RECV_WSF; 4292 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4293 param = ISCSI_PARAM_LOCAL_IPADDR; 4294 else if (attr == &dev_attr_conn_state.attr) 4295 return S_IRUGO; 4296 else { 4297 WARN_ONCE(1, "Invalid conn attr"); 4298 return 0; 4299 } 4300 4301 return t->attr_is_visible(ISCSI_PARAM, param); 4302 } 4303 4304 static struct attribute_group iscsi_conn_group = { 4305 .attrs = iscsi_conn_attrs, 4306 .is_visible = iscsi_conn_attr_is_visible, 4307 }; 4308 4309 /* 4310 * iSCSI session attrs 4311 */ 4312 #define iscsi_session_attr_show(param, perm) \ 4313 static ssize_t \ 4314 show_session_param_##param(struct device *dev, \ 4315 struct device_attribute *attr, char *buf) \ 4316 { \ 4317 struct iscsi_cls_session *session = \ 4318 iscsi_dev_to_session(dev->parent); \ 4319 struct iscsi_transport *t = session->transport; \ 4320 \ 4321 if (perm && !capable(CAP_SYS_ADMIN)) \ 4322 return -EACCES; \ 4323 return t->get_session_param(session, param, buf); \ 4324 } 4325 4326 #define iscsi_session_attr(field, param, perm) \ 4327 iscsi_session_attr_show(param, perm) \ 4328 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4329 NULL); 4330 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4331 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4332 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4333 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4334 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4335 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4336 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4337 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4338 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4339 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4340 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4341 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4342 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4343 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4344 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4345 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4346 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4347 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4348 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4349 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4350 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4351 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4352 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4353 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4354 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4355 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4356 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4357 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4358 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4359 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4360 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4361 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4362 iscsi_session_attr(discovery_auth_optional, 4363 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4364 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4365 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4366 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4367 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4368 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4369 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4370 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4371 4372 static ssize_t 4373 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4374 char *buf) 4375 { 4376 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4377 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state)); 4378 } 4379 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4380 NULL); 4381 static ssize_t 4382 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4383 char *buf) 4384 { 4385 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4386 return sysfs_emit(buf, "%d\n", session->creator); 4387 } 4388 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4389 NULL); 4390 static ssize_t 4391 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4392 char *buf) 4393 { 4394 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4395 return sysfs_emit(buf, "%d\n", session->target_id); 4396 } 4397 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4398 show_priv_session_target_id, NULL); 4399 4400 #define iscsi_priv_session_attr_show(field, format) \ 4401 static ssize_t \ 4402 show_priv_session_##field(struct device *dev, \ 4403 struct device_attribute *attr, char *buf) \ 4404 { \ 4405 struct iscsi_cls_session *session = \ 4406 iscsi_dev_to_session(dev->parent); \ 4407 if (session->field == -1) \ 4408 return sysfs_emit(buf, "off\n"); \ 4409 return sysfs_emit(buf, format"\n", session->field); \ 4410 } 4411 4412 #define iscsi_priv_session_attr_store(field) \ 4413 static ssize_t \ 4414 store_priv_session_##field(struct device *dev, \ 4415 struct device_attribute *attr, \ 4416 const char *buf, size_t count) \ 4417 { \ 4418 int val; \ 4419 char *cp; \ 4420 struct iscsi_cls_session *session = \ 4421 iscsi_dev_to_session(dev->parent); \ 4422 if ((session->state == ISCSI_SESSION_FREE) || \ 4423 (session->state == ISCSI_SESSION_FAILED)) \ 4424 return -EBUSY; \ 4425 if (strncmp(buf, "off", 3) == 0) { \ 4426 session->field = -1; \ 4427 session->field##_sysfs_override = true; \ 4428 } else { \ 4429 val = simple_strtoul(buf, &cp, 0); \ 4430 if (*cp != '\0' && *cp != '\n') \ 4431 return -EINVAL; \ 4432 session->field = val; \ 4433 session->field##_sysfs_override = true; \ 4434 } \ 4435 return count; \ 4436 } 4437 4438 #define iscsi_priv_session_rw_attr(field, format) \ 4439 iscsi_priv_session_attr_show(field, format) \ 4440 iscsi_priv_session_attr_store(field) \ 4441 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4442 show_priv_session_##field, \ 4443 store_priv_session_##field) 4444 4445 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4446 4447 static struct attribute *iscsi_session_attrs[] = { 4448 &dev_attr_sess_initial_r2t.attr, 4449 &dev_attr_sess_max_outstanding_r2t.attr, 4450 &dev_attr_sess_immediate_data.attr, 4451 &dev_attr_sess_first_burst_len.attr, 4452 &dev_attr_sess_max_burst_len.attr, 4453 &dev_attr_sess_data_pdu_in_order.attr, 4454 &dev_attr_sess_data_seq_in_order.attr, 4455 &dev_attr_sess_erl.attr, 4456 &dev_attr_sess_targetname.attr, 4457 &dev_attr_sess_tpgt.attr, 4458 &dev_attr_sess_password.attr, 4459 &dev_attr_sess_password_in.attr, 4460 &dev_attr_sess_username.attr, 4461 &dev_attr_sess_username_in.attr, 4462 &dev_attr_sess_fast_abort.attr, 4463 &dev_attr_sess_abort_tmo.attr, 4464 &dev_attr_sess_lu_reset_tmo.attr, 4465 &dev_attr_sess_tgt_reset_tmo.attr, 4466 &dev_attr_sess_ifacename.attr, 4467 &dev_attr_sess_initiatorname.attr, 4468 &dev_attr_sess_targetalias.attr, 4469 &dev_attr_sess_boot_root.attr, 4470 &dev_attr_sess_boot_nic.attr, 4471 &dev_attr_sess_boot_target.attr, 4472 &dev_attr_priv_sess_recovery_tmo.attr, 4473 &dev_attr_priv_sess_state.attr, 4474 &dev_attr_priv_sess_creator.attr, 4475 &dev_attr_sess_chap_out_idx.attr, 4476 &dev_attr_sess_chap_in_idx.attr, 4477 &dev_attr_priv_sess_target_id.attr, 4478 &dev_attr_sess_auto_snd_tgt_disable.attr, 4479 &dev_attr_sess_discovery_session.attr, 4480 &dev_attr_sess_portal_type.attr, 4481 &dev_attr_sess_chap_auth.attr, 4482 &dev_attr_sess_discovery_logout.attr, 4483 &dev_attr_sess_bidi_chap.attr, 4484 &dev_attr_sess_discovery_auth_optional.attr, 4485 &dev_attr_sess_def_time2wait.attr, 4486 &dev_attr_sess_def_time2retain.attr, 4487 &dev_attr_sess_isid.attr, 4488 &dev_attr_sess_tsid.attr, 4489 &dev_attr_sess_def_taskmgmt_tmo.attr, 4490 &dev_attr_sess_discovery_parent_idx.attr, 4491 &dev_attr_sess_discovery_parent_type.attr, 4492 NULL, 4493 }; 4494 4495 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4496 struct attribute *attr, int i) 4497 { 4498 struct device *cdev = container_of(kobj, struct device, kobj); 4499 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4500 struct iscsi_transport *t = session->transport; 4501 int param; 4502 4503 if (attr == &dev_attr_sess_initial_r2t.attr) 4504 param = ISCSI_PARAM_INITIAL_R2T_EN; 4505 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4506 param = ISCSI_PARAM_MAX_R2T; 4507 else if (attr == &dev_attr_sess_immediate_data.attr) 4508 param = ISCSI_PARAM_IMM_DATA_EN; 4509 else if (attr == &dev_attr_sess_first_burst_len.attr) 4510 param = ISCSI_PARAM_FIRST_BURST; 4511 else if (attr == &dev_attr_sess_max_burst_len.attr) 4512 param = ISCSI_PARAM_MAX_BURST; 4513 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4514 param = ISCSI_PARAM_PDU_INORDER_EN; 4515 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4516 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4517 else if (attr == &dev_attr_sess_erl.attr) 4518 param = ISCSI_PARAM_ERL; 4519 else if (attr == &dev_attr_sess_targetname.attr) 4520 param = ISCSI_PARAM_TARGET_NAME; 4521 else if (attr == &dev_attr_sess_tpgt.attr) 4522 param = ISCSI_PARAM_TPGT; 4523 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4524 param = ISCSI_PARAM_CHAP_IN_IDX; 4525 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4526 param = ISCSI_PARAM_CHAP_OUT_IDX; 4527 else if (attr == &dev_attr_sess_password.attr) 4528 param = ISCSI_PARAM_USERNAME; 4529 else if (attr == &dev_attr_sess_password_in.attr) 4530 param = ISCSI_PARAM_USERNAME_IN; 4531 else if (attr == &dev_attr_sess_username.attr) 4532 param = ISCSI_PARAM_PASSWORD; 4533 else if (attr == &dev_attr_sess_username_in.attr) 4534 param = ISCSI_PARAM_PASSWORD_IN; 4535 else if (attr == &dev_attr_sess_fast_abort.attr) 4536 param = ISCSI_PARAM_FAST_ABORT; 4537 else if (attr == &dev_attr_sess_abort_tmo.attr) 4538 param = ISCSI_PARAM_ABORT_TMO; 4539 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4540 param = ISCSI_PARAM_LU_RESET_TMO; 4541 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4542 param = ISCSI_PARAM_TGT_RESET_TMO; 4543 else if (attr == &dev_attr_sess_ifacename.attr) 4544 param = ISCSI_PARAM_IFACE_NAME; 4545 else if (attr == &dev_attr_sess_initiatorname.attr) 4546 param = ISCSI_PARAM_INITIATOR_NAME; 4547 else if (attr == &dev_attr_sess_targetalias.attr) 4548 param = ISCSI_PARAM_TARGET_ALIAS; 4549 else if (attr == &dev_attr_sess_boot_root.attr) 4550 param = ISCSI_PARAM_BOOT_ROOT; 4551 else if (attr == &dev_attr_sess_boot_nic.attr) 4552 param = ISCSI_PARAM_BOOT_NIC; 4553 else if (attr == &dev_attr_sess_boot_target.attr) 4554 param = ISCSI_PARAM_BOOT_TARGET; 4555 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4556 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4557 else if (attr == &dev_attr_sess_discovery_session.attr) 4558 param = ISCSI_PARAM_DISCOVERY_SESS; 4559 else if (attr == &dev_attr_sess_portal_type.attr) 4560 param = ISCSI_PARAM_PORTAL_TYPE; 4561 else if (attr == &dev_attr_sess_chap_auth.attr) 4562 param = ISCSI_PARAM_CHAP_AUTH_EN; 4563 else if (attr == &dev_attr_sess_discovery_logout.attr) 4564 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4565 else if (attr == &dev_attr_sess_bidi_chap.attr) 4566 param = ISCSI_PARAM_BIDI_CHAP_EN; 4567 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4568 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4569 else if (attr == &dev_attr_sess_def_time2wait.attr) 4570 param = ISCSI_PARAM_DEF_TIME2WAIT; 4571 else if (attr == &dev_attr_sess_def_time2retain.attr) 4572 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4573 else if (attr == &dev_attr_sess_isid.attr) 4574 param = ISCSI_PARAM_ISID; 4575 else if (attr == &dev_attr_sess_tsid.attr) 4576 param = ISCSI_PARAM_TSID; 4577 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4578 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4579 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4580 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4581 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4582 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4583 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4584 return S_IRUGO | S_IWUSR; 4585 else if (attr == &dev_attr_priv_sess_state.attr) 4586 return S_IRUGO; 4587 else if (attr == &dev_attr_priv_sess_creator.attr) 4588 return S_IRUGO; 4589 else if (attr == &dev_attr_priv_sess_target_id.attr) 4590 return S_IRUGO; 4591 else { 4592 WARN_ONCE(1, "Invalid session attr"); 4593 return 0; 4594 } 4595 4596 return t->attr_is_visible(ISCSI_PARAM, param); 4597 } 4598 4599 static struct attribute_group iscsi_session_group = { 4600 .attrs = iscsi_session_attrs, 4601 .is_visible = iscsi_session_attr_is_visible, 4602 }; 4603 4604 /* 4605 * iSCSI host attrs 4606 */ 4607 #define iscsi_host_attr_show(param) \ 4608 static ssize_t \ 4609 show_host_param_##param(struct device *dev, \ 4610 struct device_attribute *attr, char *buf) \ 4611 { \ 4612 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4613 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4614 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4615 } 4616 4617 #define iscsi_host_attr(field, param) \ 4618 iscsi_host_attr_show(param) \ 4619 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4620 NULL); 4621 4622 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4623 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4624 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4625 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4626 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4627 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4628 4629 static struct attribute *iscsi_host_attrs[] = { 4630 &dev_attr_host_netdev.attr, 4631 &dev_attr_host_hwaddress.attr, 4632 &dev_attr_host_ipaddress.attr, 4633 &dev_attr_host_initiatorname.attr, 4634 &dev_attr_host_port_state.attr, 4635 &dev_attr_host_port_speed.attr, 4636 NULL, 4637 }; 4638 4639 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4640 struct attribute *attr, int i) 4641 { 4642 struct device *cdev = container_of(kobj, struct device, kobj); 4643 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4644 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4645 int param; 4646 4647 if (attr == &dev_attr_host_netdev.attr) 4648 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4649 else if (attr == &dev_attr_host_hwaddress.attr) 4650 param = ISCSI_HOST_PARAM_HWADDRESS; 4651 else if (attr == &dev_attr_host_ipaddress.attr) 4652 param = ISCSI_HOST_PARAM_IPADDRESS; 4653 else if (attr == &dev_attr_host_initiatorname.attr) 4654 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4655 else if (attr == &dev_attr_host_port_state.attr) 4656 param = ISCSI_HOST_PARAM_PORT_STATE; 4657 else if (attr == &dev_attr_host_port_speed.attr) 4658 param = ISCSI_HOST_PARAM_PORT_SPEED; 4659 else { 4660 WARN_ONCE(1, "Invalid host attr"); 4661 return 0; 4662 } 4663 4664 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4665 } 4666 4667 static struct attribute_group iscsi_host_group = { 4668 .attrs = iscsi_host_attrs, 4669 .is_visible = iscsi_host_attr_is_visible, 4670 }; 4671 4672 /* convert iscsi_port_speed values to ascii string name */ 4673 static const struct { 4674 enum iscsi_port_speed value; 4675 char *name; 4676 } iscsi_port_speed_names[] = { 4677 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4678 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4679 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4680 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4681 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4682 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4683 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4684 }; 4685 4686 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4687 { 4688 int i; 4689 char *speed = "Unknown!"; 4690 struct iscsi_cls_host *ihost = shost->shost_data; 4691 uint32_t port_speed = ihost->port_speed; 4692 4693 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4694 if (iscsi_port_speed_names[i].value & port_speed) { 4695 speed = iscsi_port_speed_names[i].name; 4696 break; 4697 } 4698 } 4699 return speed; 4700 } 4701 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4702 4703 /* convert iscsi_port_state values to ascii string name */ 4704 static const struct { 4705 enum iscsi_port_state value; 4706 char *name; 4707 } iscsi_port_state_names[] = { 4708 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4709 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4710 }; 4711 4712 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4713 { 4714 int i; 4715 char *state = "Unknown!"; 4716 struct iscsi_cls_host *ihost = shost->shost_data; 4717 uint32_t port_state = ihost->port_state; 4718 4719 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4720 if (iscsi_port_state_names[i].value & port_state) { 4721 state = iscsi_port_state_names[i].name; 4722 break; 4723 } 4724 } 4725 return state; 4726 } 4727 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4728 4729 static int iscsi_session_match(struct attribute_container *cont, 4730 struct device *dev) 4731 { 4732 struct iscsi_cls_session *session; 4733 struct Scsi_Host *shost; 4734 struct iscsi_internal *priv; 4735 4736 if (!iscsi_is_session_dev(dev)) 4737 return 0; 4738 4739 session = iscsi_dev_to_session(dev); 4740 shost = iscsi_session_to_shost(session); 4741 if (!shost->transportt) 4742 return 0; 4743 4744 priv = to_iscsi_internal(shost->transportt); 4745 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4746 return 0; 4747 4748 return &priv->session_cont.ac == cont; 4749 } 4750 4751 static int iscsi_conn_match(struct attribute_container *cont, 4752 struct device *dev) 4753 { 4754 struct iscsi_cls_session *session; 4755 struct iscsi_cls_conn *conn; 4756 struct Scsi_Host *shost; 4757 struct iscsi_internal *priv; 4758 4759 if (!iscsi_is_conn_dev(dev)) 4760 return 0; 4761 4762 conn = iscsi_dev_to_conn(dev); 4763 session = iscsi_dev_to_session(conn->dev.parent); 4764 shost = iscsi_session_to_shost(session); 4765 4766 if (!shost->transportt) 4767 return 0; 4768 4769 priv = to_iscsi_internal(shost->transportt); 4770 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4771 return 0; 4772 4773 return &priv->conn_cont.ac == cont; 4774 } 4775 4776 static int iscsi_host_match(struct attribute_container *cont, 4777 struct device *dev) 4778 { 4779 struct Scsi_Host *shost; 4780 struct iscsi_internal *priv; 4781 4782 if (!scsi_is_host_device(dev)) 4783 return 0; 4784 4785 shost = dev_to_shost(dev); 4786 if (!shost->transportt || 4787 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4788 return 0; 4789 4790 priv = to_iscsi_internal(shost->transportt); 4791 return &priv->t.host_attrs.ac == cont; 4792 } 4793 4794 struct scsi_transport_template * 4795 iscsi_register_transport(struct iscsi_transport *tt) 4796 { 4797 struct iscsi_internal *priv; 4798 unsigned long flags; 4799 int err; 4800 4801 BUG_ON(!tt); 4802 WARN_ON(tt->ep_disconnect && !tt->unbind_conn); 4803 4804 priv = iscsi_if_transport_lookup(tt); 4805 if (priv) 4806 return NULL; 4807 4808 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4809 if (!priv) 4810 return NULL; 4811 INIT_LIST_HEAD(&priv->list); 4812 priv->iscsi_transport = tt; 4813 priv->t.user_scan = iscsi_user_scan; 4814 4815 priv->dev.class = &iscsi_transport_class; 4816 dev_set_name(&priv->dev, "%s", tt->name); 4817 err = device_register(&priv->dev); 4818 if (err) 4819 goto put_dev; 4820 4821 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4822 if (err) 4823 goto unregister_dev; 4824 4825 /* host parameters */ 4826 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4827 priv->t.host_attrs.ac.match = iscsi_host_match; 4828 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4829 priv->t.host_size = sizeof(struct iscsi_cls_host); 4830 transport_container_register(&priv->t.host_attrs); 4831 4832 /* connection parameters */ 4833 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4834 priv->conn_cont.ac.match = iscsi_conn_match; 4835 priv->conn_cont.ac.grp = &iscsi_conn_group; 4836 transport_container_register(&priv->conn_cont); 4837 4838 /* session parameters */ 4839 priv->session_cont.ac.class = &iscsi_session_class.class; 4840 priv->session_cont.ac.match = iscsi_session_match; 4841 priv->session_cont.ac.grp = &iscsi_session_group; 4842 transport_container_register(&priv->session_cont); 4843 4844 spin_lock_irqsave(&iscsi_transport_lock, flags); 4845 list_add(&priv->list, &iscsi_transports); 4846 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4847 4848 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4849 return &priv->t; 4850 4851 unregister_dev: 4852 device_unregister(&priv->dev); 4853 return NULL; 4854 put_dev: 4855 put_device(&priv->dev); 4856 return NULL; 4857 } 4858 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4859 4860 void iscsi_unregister_transport(struct iscsi_transport *tt) 4861 { 4862 struct iscsi_internal *priv; 4863 unsigned long flags; 4864 4865 BUG_ON(!tt); 4866 4867 mutex_lock(&rx_queue_mutex); 4868 4869 priv = iscsi_if_transport_lookup(tt); 4870 BUG_ON (!priv); 4871 4872 spin_lock_irqsave(&iscsi_transport_lock, flags); 4873 list_del(&priv->list); 4874 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4875 4876 transport_container_unregister(&priv->conn_cont); 4877 transport_container_unregister(&priv->session_cont); 4878 transport_container_unregister(&priv->t.host_attrs); 4879 4880 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4881 device_unregister(&priv->dev); 4882 mutex_unlock(&rx_queue_mutex); 4883 } 4884 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4885 4886 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4887 struct device *dev, const char *fmt, ...) 4888 { 4889 struct va_format vaf; 4890 va_list args; 4891 4892 va_start(args, fmt); 4893 vaf.fmt = fmt; 4894 vaf.va = &args; 4895 trace(dev, &vaf); 4896 va_end(args); 4897 } 4898 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4899 4900 static __init int iscsi_transport_init(void) 4901 { 4902 int err; 4903 struct netlink_kernel_cfg cfg = { 4904 .groups = 1, 4905 .input = iscsi_if_rx, 4906 }; 4907 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4908 ISCSI_TRANSPORT_VERSION); 4909 4910 atomic_set(&iscsi_session_nr, 0); 4911 4912 err = class_register(&iscsi_transport_class); 4913 if (err) 4914 return err; 4915 4916 err = class_register(&iscsi_endpoint_class); 4917 if (err) 4918 goto unregister_transport_class; 4919 4920 err = class_register(&iscsi_iface_class); 4921 if (err) 4922 goto unregister_endpoint_class; 4923 4924 err = transport_class_register(&iscsi_host_class); 4925 if (err) 4926 goto unregister_iface_class; 4927 4928 err = transport_class_register(&iscsi_connection_class); 4929 if (err) 4930 goto unregister_host_class; 4931 4932 err = transport_class_register(&iscsi_session_class); 4933 if (err) 4934 goto unregister_conn_class; 4935 4936 err = bus_register(&iscsi_flashnode_bus); 4937 if (err) 4938 goto unregister_session_class; 4939 4940 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4941 if (!nls) { 4942 err = -ENOBUFS; 4943 goto unregister_flashnode_bus; 4944 } 4945 4946 iscsi_conn_cleanup_workq = alloc_workqueue("%s", 4947 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 4948 "iscsi_conn_cleanup"); 4949 if (!iscsi_conn_cleanup_workq) { 4950 err = -ENOMEM; 4951 goto release_nls; 4952 } 4953 4954 return 0; 4955 4956 release_nls: 4957 netlink_kernel_release(nls); 4958 unregister_flashnode_bus: 4959 bus_unregister(&iscsi_flashnode_bus); 4960 unregister_session_class: 4961 transport_class_unregister(&iscsi_session_class); 4962 unregister_conn_class: 4963 transport_class_unregister(&iscsi_connection_class); 4964 unregister_host_class: 4965 transport_class_unregister(&iscsi_host_class); 4966 unregister_iface_class: 4967 class_unregister(&iscsi_iface_class); 4968 unregister_endpoint_class: 4969 class_unregister(&iscsi_endpoint_class); 4970 unregister_transport_class: 4971 class_unregister(&iscsi_transport_class); 4972 return err; 4973 } 4974 4975 static void __exit iscsi_transport_exit(void) 4976 { 4977 destroy_workqueue(iscsi_conn_cleanup_workq); 4978 netlink_kernel_release(nls); 4979 bus_unregister(&iscsi_flashnode_bus); 4980 transport_class_unregister(&iscsi_connection_class); 4981 transport_class_unregister(&iscsi_session_class); 4982 transport_class_unregister(&iscsi_host_class); 4983 class_unregister(&iscsi_endpoint_class); 4984 class_unregister(&iscsi_iface_class); 4985 class_unregister(&iscsi_transport_class); 4986 } 4987 4988 module_init(iscsi_transport_init); 4989 module_exit(iscsi_transport_exit); 4990 4991 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4992 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4993 "Alex Aizman <itn780@yahoo.com>"); 4994 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4995 MODULE_LICENSE("GPL"); 4996 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4997 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4998