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