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 /* Worker to perform connection failure on unresponsive connections 90 * completely in kernel space. 91 */ 92 static void stop_conn_work_fn(struct work_struct *work); 93 static DECLARE_WORK(stop_conn_work, stop_conn_work_fn); 94 95 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ 96 static struct workqueue_struct *iscsi_eh_timer_workq; 97 98 static struct workqueue_struct *iscsi_destroy_workq; 99 100 static DEFINE_IDA(iscsi_sess_ida); 101 /* 102 * list of registered transports and lock that must 103 * be held while accessing list. The iscsi_transport_lock must 104 * be acquired after the rx_queue_mutex. 105 */ 106 static LIST_HEAD(iscsi_transports); 107 static DEFINE_SPINLOCK(iscsi_transport_lock); 108 109 #define to_iscsi_internal(tmpl) \ 110 container_of(tmpl, struct iscsi_internal, t) 111 112 #define dev_to_iscsi_internal(_dev) \ 113 container_of(_dev, struct iscsi_internal, dev) 114 115 static void iscsi_transport_release(struct device *dev) 116 { 117 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 118 kfree(priv); 119 } 120 121 /* 122 * iscsi_transport_class represents the iscsi_transports that are 123 * registered. 124 */ 125 static struct class iscsi_transport_class = { 126 .name = "iscsi_transport", 127 .dev_release = iscsi_transport_release, 128 }; 129 130 static ssize_t 131 show_transport_handle(struct device *dev, struct device_attribute *attr, 132 char *buf) 133 { 134 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 135 return sprintf(buf, "%llu\n", (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 sprintf(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 kfree(ep); 175 } 176 177 static struct class iscsi_endpoint_class = { 178 .name = "iscsi_endpoint", 179 .dev_release = iscsi_endpoint_release, 180 }; 181 182 static ssize_t 183 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) 184 { 185 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 186 return sprintf(buf, "%llu\n", (unsigned long long) ep->id); 187 } 188 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); 189 190 static struct attribute *iscsi_endpoint_attrs[] = { 191 &dev_attr_ep_handle.attr, 192 NULL, 193 }; 194 195 static struct attribute_group iscsi_endpoint_group = { 196 .attrs = iscsi_endpoint_attrs, 197 }; 198 199 #define ISCSI_MAX_EPID -1 200 201 static int iscsi_match_epid(struct device *dev, const void *data) 202 { 203 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 204 const uint64_t *epid = data; 205 206 return *epid == ep->id; 207 } 208 209 struct iscsi_endpoint * 210 iscsi_create_endpoint(int dd_size) 211 { 212 struct device *dev; 213 struct iscsi_endpoint *ep; 214 uint64_t id; 215 int err; 216 217 for (id = 1; id < ISCSI_MAX_EPID; id++) { 218 dev = class_find_device(&iscsi_endpoint_class, NULL, &id, 219 iscsi_match_epid); 220 if (!dev) 221 break; 222 else 223 put_device(dev); 224 } 225 if (id == ISCSI_MAX_EPID) { 226 printk(KERN_ERR "Too many connections. Max supported %u\n", 227 ISCSI_MAX_EPID - 1); 228 return NULL; 229 } 230 231 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); 232 if (!ep) 233 return NULL; 234 235 ep->id = id; 236 ep->dev.class = &iscsi_endpoint_class; 237 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); 238 err = device_register(&ep->dev); 239 if (err) 240 goto free_ep; 241 242 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); 243 if (err) 244 goto unregister_dev; 245 246 if (dd_size) 247 ep->dd_data = &ep[1]; 248 return ep; 249 250 unregister_dev: 251 device_unregister(&ep->dev); 252 return NULL; 253 254 free_ep: 255 kfree(ep); 256 return NULL; 257 } 258 EXPORT_SYMBOL_GPL(iscsi_create_endpoint); 259 260 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) 261 { 262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); 263 device_unregister(&ep->dev); 264 } 265 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); 266 267 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 268 { 269 struct iscsi_endpoint *ep; 270 struct device *dev; 271 272 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, 273 iscsi_match_epid); 274 if (!dev) 275 return NULL; 276 277 ep = iscsi_dev_to_endpoint(dev); 278 /* 279 * we can drop this now because the interface will prevent 280 * removals and lookups from racing. 281 */ 282 put_device(dev); 283 return ep; 284 } 285 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 286 287 /* 288 * Interface to display network param to sysfs 289 */ 290 291 static void iscsi_iface_release(struct device *dev) 292 { 293 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 294 struct device *parent = iface->dev.parent; 295 296 kfree(iface); 297 put_device(parent); 298 } 299 300 301 static struct class iscsi_iface_class = { 302 .name = "iscsi_iface", 303 .dev_release = iscsi_iface_release, 304 }; 305 306 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 307 struct device_attribute dev_attr_##_prefix##_##_name = \ 308 __ATTR(_name, _mode, _show, _store) 309 310 /* iface attrs show */ 311 #define iscsi_iface_attr_show(type, name, param_type, param) \ 312 static ssize_t \ 313 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 314 char *buf) \ 315 { \ 316 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 317 struct iscsi_transport *t = iface->transport; \ 318 return t->get_iface_param(iface, param_type, param, buf); \ 319 } \ 320 321 #define iscsi_iface_net_attr(type, name, param) \ 322 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 323 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 324 325 #define iscsi_iface_attr(type, name, param) \ 326 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 327 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 328 329 /* generic read only ipv4 attribute */ 330 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 331 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 332 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 333 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 334 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 335 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 336 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 337 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 338 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 339 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 340 iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 341 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 342 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 343 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 344 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 345 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 346 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 347 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 348 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 349 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 350 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 351 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 352 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 353 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 354 iscsi_iface_net_attr(ipv4_iface, fragment_disable, 355 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 356 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 357 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 358 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 359 360 /* generic read only ipv6 attribute */ 361 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 362 iscsi_iface_net_attr(ipv6_iface, link_local_addr, 363 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 364 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 365 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 366 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 367 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 368 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 369 iscsi_iface_net_attr(ipv6_iface, link_local_state, 370 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 371 iscsi_iface_net_attr(ipv6_iface, router_state, 372 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 373 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 374 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 375 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 376 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 377 iscsi_iface_net_attr(ipv6_iface, traffic_class, 378 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 379 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 380 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 381 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 382 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 383 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 384 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 385 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 386 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 387 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 388 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 389 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 390 391 /* common read only iface attribute */ 392 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 393 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 394 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 395 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 396 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 397 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 398 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 399 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 400 iscsi_iface_net_attr(iface, tcp_nagle_disable, 401 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 402 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 403 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 404 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 405 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 406 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 407 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 408 409 /* common iscsi specific settings attributes */ 410 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 411 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 412 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 413 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 414 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 415 iscsi_iface_attr(iface, data_seq_in_order, 416 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 417 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 418 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 419 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 420 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 421 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 422 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 423 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 424 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 425 iscsi_iface_attr(iface, discovery_auth_optional, 426 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 427 iscsi_iface_attr(iface, discovery_logout, 428 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 429 iscsi_iface_attr(iface, strict_login_comp_en, 430 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 431 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 432 433 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 434 struct attribute *attr, int i) 435 { 436 struct device *dev = container_of(kobj, struct device, kobj); 437 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 438 struct iscsi_transport *t = iface->transport; 439 int param; 440 int param_type; 441 442 if (attr == &dev_attr_iface_enabled.attr) 443 param = ISCSI_NET_PARAM_IFACE_ENABLE; 444 else if (attr == &dev_attr_iface_vlan_id.attr) 445 param = ISCSI_NET_PARAM_VLAN_ID; 446 else if (attr == &dev_attr_iface_vlan_priority.attr) 447 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 448 else if (attr == &dev_attr_iface_vlan_enabled.attr) 449 param = ISCSI_NET_PARAM_VLAN_ENABLED; 450 else if (attr == &dev_attr_iface_mtu.attr) 451 param = ISCSI_NET_PARAM_MTU; 452 else if (attr == &dev_attr_iface_port.attr) 453 param = ISCSI_NET_PARAM_PORT; 454 else if (attr == &dev_attr_iface_ipaddress_state.attr) 455 param = ISCSI_NET_PARAM_IPADDR_STATE; 456 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 457 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 458 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 459 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 460 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 461 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 462 else if (attr == &dev_attr_iface_tcp_wsf.attr) 463 param = ISCSI_NET_PARAM_TCP_WSF; 464 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 465 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 466 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 467 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 468 else if (attr == &dev_attr_iface_cache_id.attr) 469 param = ISCSI_NET_PARAM_CACHE_ID; 470 else if (attr == &dev_attr_iface_redirect_en.attr) 471 param = ISCSI_NET_PARAM_REDIRECT_EN; 472 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 473 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 474 else if (attr == &dev_attr_iface_header_digest.attr) 475 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 476 else if (attr == &dev_attr_iface_data_digest.attr) 477 param = ISCSI_IFACE_PARAM_DATADGST_EN; 478 else if (attr == &dev_attr_iface_immediate_data.attr) 479 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 480 else if (attr == &dev_attr_iface_initial_r2t.attr) 481 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 482 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 483 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 484 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 485 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 486 else if (attr == &dev_attr_iface_erl.attr) 487 param = ISCSI_IFACE_PARAM_ERL; 488 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 489 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 490 else if (attr == &dev_attr_iface_first_burst_len.attr) 491 param = ISCSI_IFACE_PARAM_FIRST_BURST; 492 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 493 param = ISCSI_IFACE_PARAM_MAX_R2T; 494 else if (attr == &dev_attr_iface_max_burst_len.attr) 495 param = ISCSI_IFACE_PARAM_MAX_BURST; 496 else if (attr == &dev_attr_iface_chap_auth.attr) 497 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 498 else if (attr == &dev_attr_iface_bidi_chap.attr) 499 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 500 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 501 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 502 else if (attr == &dev_attr_iface_discovery_logout.attr) 503 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 504 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 505 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 506 else if (attr == &dev_attr_iface_initiator_name.attr) 507 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 508 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 509 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 510 param = ISCSI_NET_PARAM_IPV4_ADDR; 511 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 512 param = ISCSI_NET_PARAM_IPV4_GW; 513 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 514 param = ISCSI_NET_PARAM_IPV4_SUBNET; 515 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 516 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 517 else if (attr == 518 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 519 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 520 else if (attr == 521 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 522 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 523 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 524 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 525 else if (attr == &dev_attr_ipv4_iface_tos.attr) 526 param = ISCSI_NET_PARAM_IPV4_TOS; 527 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 528 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 529 else if (attr == 530 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 531 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 532 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 533 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 534 else if (attr == 535 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 536 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 537 else if (attr == 538 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 539 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 540 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 541 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 542 else if (attr == 543 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 544 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 545 else if (attr == 546 &dev_attr_ipv4_iface_fragment_disable.attr) 547 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 548 else if (attr == 549 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 550 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 551 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 552 param = ISCSI_NET_PARAM_IPV4_TTL; 553 else 554 return 0; 555 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 556 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 557 param = ISCSI_NET_PARAM_IPV6_ADDR; 558 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 559 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 560 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 561 param = ISCSI_NET_PARAM_IPV6_ROUTER; 562 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 563 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 564 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 565 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 566 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 567 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 568 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 569 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 570 else if (attr == 571 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 572 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 573 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 574 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 575 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 576 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 577 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 578 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 579 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 580 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 581 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 582 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 583 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 584 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 585 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 586 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 587 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 588 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 589 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 590 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 591 else 592 return 0; 593 } else { 594 WARN_ONCE(1, "Invalid iface attr"); 595 return 0; 596 } 597 598 switch (param) { 599 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO: 600 case ISCSI_IFACE_PARAM_HDRDGST_EN: 601 case ISCSI_IFACE_PARAM_DATADGST_EN: 602 case ISCSI_IFACE_PARAM_IMM_DATA_EN: 603 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN: 604 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN: 605 case ISCSI_IFACE_PARAM_PDU_INORDER_EN: 606 case ISCSI_IFACE_PARAM_ERL: 607 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH: 608 case ISCSI_IFACE_PARAM_FIRST_BURST: 609 case ISCSI_IFACE_PARAM_MAX_R2T: 610 case ISCSI_IFACE_PARAM_MAX_BURST: 611 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN: 612 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN: 613 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL: 614 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN: 615 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN: 616 case ISCSI_IFACE_PARAM_INITIATOR_NAME: 617 param_type = ISCSI_IFACE_PARAM; 618 break; 619 default: 620 param_type = ISCSI_NET_PARAM; 621 } 622 623 return t->attr_is_visible(param_type, param); 624 } 625 626 static struct attribute *iscsi_iface_attrs[] = { 627 &dev_attr_iface_enabled.attr, 628 &dev_attr_iface_vlan_id.attr, 629 &dev_attr_iface_vlan_priority.attr, 630 &dev_attr_iface_vlan_enabled.attr, 631 &dev_attr_ipv4_iface_ipaddress.attr, 632 &dev_attr_ipv4_iface_gateway.attr, 633 &dev_attr_ipv4_iface_subnet.attr, 634 &dev_attr_ipv4_iface_bootproto.attr, 635 &dev_attr_ipv6_iface_ipaddress.attr, 636 &dev_attr_ipv6_iface_link_local_addr.attr, 637 &dev_attr_ipv6_iface_router_addr.attr, 638 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 639 &dev_attr_ipv6_iface_link_local_autocfg.attr, 640 &dev_attr_iface_mtu.attr, 641 &dev_attr_iface_port.attr, 642 &dev_attr_iface_ipaddress_state.attr, 643 &dev_attr_iface_delayed_ack_en.attr, 644 &dev_attr_iface_tcp_nagle_disable.attr, 645 &dev_attr_iface_tcp_wsf_disable.attr, 646 &dev_attr_iface_tcp_wsf.attr, 647 &dev_attr_iface_tcp_timer_scale.attr, 648 &dev_attr_iface_tcp_timestamp_en.attr, 649 &dev_attr_iface_cache_id.attr, 650 &dev_attr_iface_redirect_en.attr, 651 &dev_attr_iface_def_taskmgmt_tmo.attr, 652 &dev_attr_iface_header_digest.attr, 653 &dev_attr_iface_data_digest.attr, 654 &dev_attr_iface_immediate_data.attr, 655 &dev_attr_iface_initial_r2t.attr, 656 &dev_attr_iface_data_seq_in_order.attr, 657 &dev_attr_iface_data_pdu_in_order.attr, 658 &dev_attr_iface_erl.attr, 659 &dev_attr_iface_max_recv_dlength.attr, 660 &dev_attr_iface_first_burst_len.attr, 661 &dev_attr_iface_max_outstanding_r2t.attr, 662 &dev_attr_iface_max_burst_len.attr, 663 &dev_attr_iface_chap_auth.attr, 664 &dev_attr_iface_bidi_chap.attr, 665 &dev_attr_iface_discovery_auth_optional.attr, 666 &dev_attr_iface_discovery_logout.attr, 667 &dev_attr_iface_strict_login_comp_en.attr, 668 &dev_attr_iface_initiator_name.attr, 669 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 670 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 671 &dev_attr_ipv4_iface_tos_en.attr, 672 &dev_attr_ipv4_iface_tos.attr, 673 &dev_attr_ipv4_iface_grat_arp_en.attr, 674 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 675 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 676 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 677 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 678 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 679 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 680 &dev_attr_ipv4_iface_fragment_disable.attr, 681 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 682 &dev_attr_ipv4_iface_ttl.attr, 683 &dev_attr_ipv6_iface_link_local_state.attr, 684 &dev_attr_ipv6_iface_router_state.attr, 685 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 686 &dev_attr_ipv6_iface_mld_en.attr, 687 &dev_attr_ipv6_iface_flow_label.attr, 688 &dev_attr_ipv6_iface_traffic_class.attr, 689 &dev_attr_ipv6_iface_hop_limit.attr, 690 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 691 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 692 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 693 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 694 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 695 NULL, 696 }; 697 698 static struct attribute_group iscsi_iface_group = { 699 .attrs = iscsi_iface_attrs, 700 .is_visible = iscsi_iface_attr_is_visible, 701 }; 702 703 /* convert iscsi_ipaddress_state values to ascii string name */ 704 static const struct { 705 enum iscsi_ipaddress_state value; 706 char *name; 707 } iscsi_ipaddress_state_names[] = { 708 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 709 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 710 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 711 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 712 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 713 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 714 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 715 }; 716 717 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 718 { 719 int i; 720 char *state = NULL; 721 722 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 723 if (iscsi_ipaddress_state_names[i].value == port_state) { 724 state = iscsi_ipaddress_state_names[i].name; 725 break; 726 } 727 } 728 return state; 729 } 730 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 731 732 /* convert iscsi_router_state values to ascii string name */ 733 static const struct { 734 enum iscsi_router_state value; 735 char *name; 736 } iscsi_router_state_names[] = { 737 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 738 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 739 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 740 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 741 }; 742 743 char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 744 { 745 int i; 746 char *state = NULL; 747 748 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 749 if (iscsi_router_state_names[i].value == router_state) { 750 state = iscsi_router_state_names[i].name; 751 break; 752 } 753 } 754 return state; 755 } 756 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 757 758 struct iscsi_iface * 759 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 760 uint32_t iface_type, uint32_t iface_num, int dd_size) 761 { 762 struct iscsi_iface *iface; 763 int err; 764 765 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 766 if (!iface) 767 return NULL; 768 769 iface->transport = transport; 770 iface->iface_type = iface_type; 771 iface->iface_num = iface_num; 772 iface->dev.release = iscsi_iface_release; 773 iface->dev.class = &iscsi_iface_class; 774 /* parent reference released in iscsi_iface_release */ 775 iface->dev.parent = get_device(&shost->shost_gendev); 776 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 777 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 778 iface_num); 779 else 780 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 781 iface_num); 782 783 err = device_register(&iface->dev); 784 if (err) 785 goto free_iface; 786 787 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 788 if (err) 789 goto unreg_iface; 790 791 if (dd_size) 792 iface->dd_data = &iface[1]; 793 return iface; 794 795 unreg_iface: 796 device_unregister(&iface->dev); 797 return NULL; 798 799 free_iface: 800 put_device(iface->dev.parent); 801 kfree(iface); 802 return NULL; 803 } 804 EXPORT_SYMBOL_GPL(iscsi_create_iface); 805 806 void iscsi_destroy_iface(struct iscsi_iface *iface) 807 { 808 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 809 device_unregister(&iface->dev); 810 } 811 EXPORT_SYMBOL_GPL(iscsi_destroy_iface); 812 813 /* 814 * Interface to display flash node params to sysfs 815 */ 816 817 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ 818 struct device_attribute dev_attr_##_prefix##_##_name = \ 819 __ATTR(_name, _mode, _show, _store) 820 821 /* flash node session attrs show */ 822 #define iscsi_flashnode_sess_attr_show(type, name, param) \ 823 static ssize_t \ 824 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 825 char *buf) \ 826 { \ 827 struct iscsi_bus_flash_session *fnode_sess = \ 828 iscsi_dev_to_flash_session(dev);\ 829 struct iscsi_transport *t = fnode_sess->transport; \ 830 return t->get_flashnode_param(fnode_sess, param, buf); \ 831 } \ 832 833 834 #define iscsi_flashnode_sess_attr(type, name, param) \ 835 iscsi_flashnode_sess_attr_show(type, name, param) \ 836 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 837 show_##type##_##name, NULL); 838 839 /* Flash node session attributes */ 840 841 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 842 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 843 iscsi_flashnode_sess_attr(fnode, discovery_session, 844 ISCSI_FLASHNODE_DISCOVERY_SESS); 845 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 846 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 847 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 848 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 849 iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 850 ISCSI_FLASHNODE_DATASEQ_INORDER); 851 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 852 ISCSI_FLASHNODE_PDU_INORDER); 853 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 854 iscsi_flashnode_sess_attr(fnode, discovery_logout, 855 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 856 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 857 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 858 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 859 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 860 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 861 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 862 iscsi_flashnode_sess_attr(fnode, def_time2retain, 863 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 864 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 865 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 866 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 867 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 868 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 869 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 870 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 871 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 872 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 873 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 874 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 875 iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 876 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 877 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 878 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 879 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 880 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 881 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 882 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 883 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 884 885 static struct attribute *iscsi_flashnode_sess_attrs[] = { 886 &dev_attr_fnode_auto_snd_tgt_disable.attr, 887 &dev_attr_fnode_discovery_session.attr, 888 &dev_attr_fnode_portal_type.attr, 889 &dev_attr_fnode_entry_enable.attr, 890 &dev_attr_fnode_immediate_data.attr, 891 &dev_attr_fnode_initial_r2t.attr, 892 &dev_attr_fnode_data_seq_in_order.attr, 893 &dev_attr_fnode_data_pdu_in_order.attr, 894 &dev_attr_fnode_chap_auth.attr, 895 &dev_attr_fnode_discovery_logout.attr, 896 &dev_attr_fnode_bidi_chap.attr, 897 &dev_attr_fnode_discovery_auth_optional.attr, 898 &dev_attr_fnode_erl.attr, 899 &dev_attr_fnode_first_burst_len.attr, 900 &dev_attr_fnode_def_time2wait.attr, 901 &dev_attr_fnode_def_time2retain.attr, 902 &dev_attr_fnode_max_outstanding_r2t.attr, 903 &dev_attr_fnode_isid.attr, 904 &dev_attr_fnode_tsid.attr, 905 &dev_attr_fnode_max_burst_len.attr, 906 &dev_attr_fnode_def_taskmgmt_tmo.attr, 907 &dev_attr_fnode_targetalias.attr, 908 &dev_attr_fnode_targetname.attr, 909 &dev_attr_fnode_tpgt.attr, 910 &dev_attr_fnode_discovery_parent_idx.attr, 911 &dev_attr_fnode_discovery_parent_type.attr, 912 &dev_attr_fnode_chap_in_idx.attr, 913 &dev_attr_fnode_chap_out_idx.attr, 914 &dev_attr_fnode_username.attr, 915 &dev_attr_fnode_username_in.attr, 916 &dev_attr_fnode_password.attr, 917 &dev_attr_fnode_password_in.attr, 918 &dev_attr_fnode_is_boot_target.attr, 919 NULL, 920 }; 921 922 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, 923 struct attribute *attr, 924 int i) 925 { 926 struct device *dev = container_of(kobj, struct device, kobj); 927 struct iscsi_bus_flash_session *fnode_sess = 928 iscsi_dev_to_flash_session(dev); 929 struct iscsi_transport *t = fnode_sess->transport; 930 int param; 931 932 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { 933 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; 934 } else if (attr == &dev_attr_fnode_discovery_session.attr) { 935 param = ISCSI_FLASHNODE_DISCOVERY_SESS; 936 } else if (attr == &dev_attr_fnode_portal_type.attr) { 937 param = ISCSI_FLASHNODE_PORTAL_TYPE; 938 } else if (attr == &dev_attr_fnode_entry_enable.attr) { 939 param = ISCSI_FLASHNODE_ENTRY_EN; 940 } else if (attr == &dev_attr_fnode_immediate_data.attr) { 941 param = ISCSI_FLASHNODE_IMM_DATA_EN; 942 } else if (attr == &dev_attr_fnode_initial_r2t.attr) { 943 param = ISCSI_FLASHNODE_INITIAL_R2T_EN; 944 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { 945 param = ISCSI_FLASHNODE_DATASEQ_INORDER; 946 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { 947 param = ISCSI_FLASHNODE_PDU_INORDER; 948 } else if (attr == &dev_attr_fnode_chap_auth.attr) { 949 param = ISCSI_FLASHNODE_CHAP_AUTH_EN; 950 } else if (attr == &dev_attr_fnode_discovery_logout.attr) { 951 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; 952 } else if (attr == &dev_attr_fnode_bidi_chap.attr) { 953 param = ISCSI_FLASHNODE_BIDI_CHAP_EN; 954 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { 955 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; 956 } else if (attr == &dev_attr_fnode_erl.attr) { 957 param = ISCSI_FLASHNODE_ERL; 958 } else if (attr == &dev_attr_fnode_first_burst_len.attr) { 959 param = ISCSI_FLASHNODE_FIRST_BURST; 960 } else if (attr == &dev_attr_fnode_def_time2wait.attr) { 961 param = ISCSI_FLASHNODE_DEF_TIME2WAIT; 962 } else if (attr == &dev_attr_fnode_def_time2retain.attr) { 963 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; 964 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { 965 param = ISCSI_FLASHNODE_MAX_R2T; 966 } else if (attr == &dev_attr_fnode_isid.attr) { 967 param = ISCSI_FLASHNODE_ISID; 968 } else if (attr == &dev_attr_fnode_tsid.attr) { 969 param = ISCSI_FLASHNODE_TSID; 970 } else if (attr == &dev_attr_fnode_max_burst_len.attr) { 971 param = ISCSI_FLASHNODE_MAX_BURST; 972 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { 973 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; 974 } else if (attr == &dev_attr_fnode_targetalias.attr) { 975 param = ISCSI_FLASHNODE_ALIAS; 976 } else if (attr == &dev_attr_fnode_targetname.attr) { 977 param = ISCSI_FLASHNODE_NAME; 978 } else if (attr == &dev_attr_fnode_tpgt.attr) { 979 param = ISCSI_FLASHNODE_TPGT; 980 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { 981 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; 982 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { 983 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; 984 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { 985 param = ISCSI_FLASHNODE_CHAP_IN_IDX; 986 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { 987 param = ISCSI_FLASHNODE_CHAP_OUT_IDX; 988 } else if (attr == &dev_attr_fnode_username.attr) { 989 param = ISCSI_FLASHNODE_USERNAME; 990 } else if (attr == &dev_attr_fnode_username_in.attr) { 991 param = ISCSI_FLASHNODE_USERNAME_IN; 992 } else if (attr == &dev_attr_fnode_password.attr) { 993 param = ISCSI_FLASHNODE_PASSWORD; 994 } else if (attr == &dev_attr_fnode_password_in.attr) { 995 param = ISCSI_FLASHNODE_PASSWORD_IN; 996 } else if (attr == &dev_attr_fnode_is_boot_target.attr) { 997 param = ISCSI_FLASHNODE_IS_BOOT_TGT; 998 } else { 999 WARN_ONCE(1, "Invalid flashnode session attr"); 1000 return 0; 1001 } 1002 1003 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1004 } 1005 1006 static struct attribute_group iscsi_flashnode_sess_attr_group = { 1007 .attrs = iscsi_flashnode_sess_attrs, 1008 .is_visible = iscsi_flashnode_sess_attr_is_visible, 1009 }; 1010 1011 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 1012 &iscsi_flashnode_sess_attr_group, 1013 NULL, 1014 }; 1015 1016 static void iscsi_flashnode_sess_release(struct device *dev) 1017 { 1018 struct iscsi_bus_flash_session *fnode_sess = 1019 iscsi_dev_to_flash_session(dev); 1020 1021 kfree(fnode_sess->targetname); 1022 kfree(fnode_sess->targetalias); 1023 kfree(fnode_sess->portal_type); 1024 kfree(fnode_sess); 1025 } 1026 1027 static const struct device_type iscsi_flashnode_sess_dev_type = { 1028 .name = "iscsi_flashnode_sess_dev_type", 1029 .groups = iscsi_flashnode_sess_attr_groups, 1030 .release = iscsi_flashnode_sess_release, 1031 }; 1032 1033 /* flash node connection attrs show */ 1034 #define iscsi_flashnode_conn_attr_show(type, name, param) \ 1035 static ssize_t \ 1036 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 1037 char *buf) \ 1038 { \ 1039 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ 1040 struct iscsi_bus_flash_session *fnode_sess = \ 1041 iscsi_flash_conn_to_flash_session(fnode_conn);\ 1042 struct iscsi_transport *t = fnode_conn->transport; \ 1043 return t->get_flashnode_param(fnode_sess, param, buf); \ 1044 } \ 1045 1046 1047 #define iscsi_flashnode_conn_attr(type, name, param) \ 1048 iscsi_flashnode_conn_attr_show(type, name, param) \ 1049 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1050 show_##type##_##name, NULL); 1051 1052 /* Flash node connection attributes */ 1053 1054 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1055 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1056 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1057 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1058 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1059 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1060 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1061 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1062 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1063 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1064 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1065 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1066 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1067 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1068 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1069 iscsi_flashnode_conn_attr(fnode, fragment_disable, 1070 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1071 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1072 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1073 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1074 iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1075 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1076 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1077 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1078 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1079 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1080 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1081 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1082 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1083 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1084 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1085 iscsi_flashnode_conn_attr(fnode, max_segment_size, 1086 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1087 iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1088 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1089 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1090 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1091 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1092 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1093 1094 static struct attribute *iscsi_flashnode_conn_attrs[] = { 1095 &dev_attr_fnode_is_fw_assigned_ipv6.attr, 1096 &dev_attr_fnode_header_digest.attr, 1097 &dev_attr_fnode_data_digest.attr, 1098 &dev_attr_fnode_snack_req.attr, 1099 &dev_attr_fnode_tcp_timestamp_stat.attr, 1100 &dev_attr_fnode_tcp_nagle_disable.attr, 1101 &dev_attr_fnode_tcp_wsf_disable.attr, 1102 &dev_attr_fnode_tcp_timer_scale.attr, 1103 &dev_attr_fnode_tcp_timestamp_enable.attr, 1104 &dev_attr_fnode_fragment_disable.attr, 1105 &dev_attr_fnode_max_recv_dlength.attr, 1106 &dev_attr_fnode_max_xmit_dlength.attr, 1107 &dev_attr_fnode_keepalive_tmo.attr, 1108 &dev_attr_fnode_port.attr, 1109 &dev_attr_fnode_ipaddress.attr, 1110 &dev_attr_fnode_redirect_ipaddr.attr, 1111 &dev_attr_fnode_max_segment_size.attr, 1112 &dev_attr_fnode_local_port.attr, 1113 &dev_attr_fnode_ipv4_tos.attr, 1114 &dev_attr_fnode_ipv6_traffic_class.attr, 1115 &dev_attr_fnode_ipv6_flow_label.attr, 1116 &dev_attr_fnode_link_local_ipv6.attr, 1117 &dev_attr_fnode_tcp_xmit_wsf.attr, 1118 &dev_attr_fnode_tcp_recv_wsf.attr, 1119 &dev_attr_fnode_statsn.attr, 1120 &dev_attr_fnode_exp_statsn.attr, 1121 NULL, 1122 }; 1123 1124 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, 1125 struct attribute *attr, 1126 int i) 1127 { 1128 struct device *dev = container_of(kobj, struct device, kobj); 1129 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1130 struct iscsi_transport *t = fnode_conn->transport; 1131 int param; 1132 1133 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { 1134 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; 1135 } else if (attr == &dev_attr_fnode_header_digest.attr) { 1136 param = ISCSI_FLASHNODE_HDR_DGST_EN; 1137 } else if (attr == &dev_attr_fnode_data_digest.attr) { 1138 param = ISCSI_FLASHNODE_DATA_DGST_EN; 1139 } else if (attr == &dev_attr_fnode_snack_req.attr) { 1140 param = ISCSI_FLASHNODE_SNACK_REQ_EN; 1141 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { 1142 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; 1143 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { 1144 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; 1145 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { 1146 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; 1147 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { 1148 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; 1149 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { 1150 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; 1151 } else if (attr == &dev_attr_fnode_fragment_disable.attr) { 1152 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; 1153 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { 1154 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; 1155 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { 1156 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; 1157 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { 1158 param = ISCSI_FLASHNODE_KEEPALIVE_TMO; 1159 } else if (attr == &dev_attr_fnode_port.attr) { 1160 param = ISCSI_FLASHNODE_PORT; 1161 } else if (attr == &dev_attr_fnode_ipaddress.attr) { 1162 param = ISCSI_FLASHNODE_IPADDR; 1163 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { 1164 param = ISCSI_FLASHNODE_REDIRECT_IPADDR; 1165 } else if (attr == &dev_attr_fnode_max_segment_size.attr) { 1166 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; 1167 } else if (attr == &dev_attr_fnode_local_port.attr) { 1168 param = ISCSI_FLASHNODE_LOCAL_PORT; 1169 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { 1170 param = ISCSI_FLASHNODE_IPV4_TOS; 1171 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { 1172 param = ISCSI_FLASHNODE_IPV6_TC; 1173 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { 1174 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; 1175 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { 1176 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; 1177 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { 1178 param = ISCSI_FLASHNODE_TCP_XMIT_WSF; 1179 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { 1180 param = ISCSI_FLASHNODE_TCP_RECV_WSF; 1181 } else if (attr == &dev_attr_fnode_statsn.attr) { 1182 param = ISCSI_FLASHNODE_STATSN; 1183 } else if (attr == &dev_attr_fnode_exp_statsn.attr) { 1184 param = ISCSI_FLASHNODE_EXP_STATSN; 1185 } else { 1186 WARN_ONCE(1, "Invalid flashnode connection attr"); 1187 return 0; 1188 } 1189 1190 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1191 } 1192 1193 static struct attribute_group iscsi_flashnode_conn_attr_group = { 1194 .attrs = iscsi_flashnode_conn_attrs, 1195 .is_visible = iscsi_flashnode_conn_attr_is_visible, 1196 }; 1197 1198 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1199 &iscsi_flashnode_conn_attr_group, 1200 NULL, 1201 }; 1202 1203 static void iscsi_flashnode_conn_release(struct device *dev) 1204 { 1205 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1206 1207 kfree(fnode_conn->ipaddress); 1208 kfree(fnode_conn->redirect_ipaddr); 1209 kfree(fnode_conn->link_local_ipv6_addr); 1210 kfree(fnode_conn); 1211 } 1212 1213 static const struct device_type iscsi_flashnode_conn_dev_type = { 1214 .name = "iscsi_flashnode_conn_dev_type", 1215 .groups = iscsi_flashnode_conn_attr_groups, 1216 .release = iscsi_flashnode_conn_release, 1217 }; 1218 1219 static struct bus_type iscsi_flashnode_bus; 1220 1221 int iscsi_flashnode_bus_match(struct device *dev, 1222 struct device_driver *drv) 1223 { 1224 if (dev->bus == &iscsi_flashnode_bus) 1225 return 1; 1226 return 0; 1227 } 1228 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1229 1230 static struct bus_type iscsi_flashnode_bus = { 1231 .name = "iscsi_flashnode", 1232 .match = &iscsi_flashnode_bus_match, 1233 }; 1234 1235 /** 1236 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs 1237 * @shost: pointer to host data 1238 * @index: index of flashnode to add in sysfs 1239 * @transport: pointer to transport data 1240 * @dd_size: total size to allocate 1241 * 1242 * Adds a sysfs entry for the flashnode session attributes 1243 * 1244 * Returns: 1245 * pointer to allocated flashnode sess on success 1246 * %NULL on failure 1247 */ 1248 struct iscsi_bus_flash_session * 1249 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, 1250 struct iscsi_transport *transport, 1251 int dd_size) 1252 { 1253 struct iscsi_bus_flash_session *fnode_sess; 1254 int err; 1255 1256 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); 1257 if (!fnode_sess) 1258 return NULL; 1259 1260 fnode_sess->transport = transport; 1261 fnode_sess->target_id = index; 1262 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; 1263 fnode_sess->dev.bus = &iscsi_flashnode_bus; 1264 fnode_sess->dev.parent = &shost->shost_gendev; 1265 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", 1266 shost->host_no, index); 1267 1268 err = device_register(&fnode_sess->dev); 1269 if (err) 1270 goto free_fnode_sess; 1271 1272 if (dd_size) 1273 fnode_sess->dd_data = &fnode_sess[1]; 1274 1275 return fnode_sess; 1276 1277 free_fnode_sess: 1278 kfree(fnode_sess); 1279 return NULL; 1280 } 1281 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); 1282 1283 /** 1284 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs 1285 * @shost: pointer to host data 1286 * @fnode_sess: pointer to the parent flashnode session entry 1287 * @transport: pointer to transport data 1288 * @dd_size: total size to allocate 1289 * 1290 * Adds a sysfs entry for the flashnode connection attributes 1291 * 1292 * Returns: 1293 * pointer to allocated flashnode conn on success 1294 * %NULL on failure 1295 */ 1296 struct iscsi_bus_flash_conn * 1297 iscsi_create_flashnode_conn(struct Scsi_Host *shost, 1298 struct iscsi_bus_flash_session *fnode_sess, 1299 struct iscsi_transport *transport, 1300 int dd_size) 1301 { 1302 struct iscsi_bus_flash_conn *fnode_conn; 1303 int err; 1304 1305 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); 1306 if (!fnode_conn) 1307 return NULL; 1308 1309 fnode_conn->transport = transport; 1310 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; 1311 fnode_conn->dev.bus = &iscsi_flashnode_bus; 1312 fnode_conn->dev.parent = &fnode_sess->dev; 1313 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", 1314 shost->host_no, fnode_sess->target_id); 1315 1316 err = device_register(&fnode_conn->dev); 1317 if (err) 1318 goto free_fnode_conn; 1319 1320 if (dd_size) 1321 fnode_conn->dd_data = &fnode_conn[1]; 1322 1323 return fnode_conn; 1324 1325 free_fnode_conn: 1326 kfree(fnode_conn); 1327 return NULL; 1328 } 1329 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); 1330 1331 /** 1332 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn 1333 * @dev: device to verify 1334 * @data: pointer to data containing value to use for verification 1335 * 1336 * Verifies if the passed device is flashnode conn device 1337 * 1338 * Returns: 1339 * 1 on success 1340 * 0 on failure 1341 */ 1342 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1343 { 1344 return dev->bus == &iscsi_flashnode_bus; 1345 } 1346 1347 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1348 { 1349 device_unregister(&fnode_conn->dev); 1350 return 0; 1351 } 1352 1353 static int flashnode_match_index(struct device *dev, void *data) 1354 { 1355 struct iscsi_bus_flash_session *fnode_sess = NULL; 1356 int ret = 0; 1357 1358 if (!iscsi_flashnode_bus_match(dev, NULL)) 1359 goto exit_match_index; 1360 1361 fnode_sess = iscsi_dev_to_flash_session(dev); 1362 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1363 1364 exit_match_index: 1365 return ret; 1366 } 1367 1368 /** 1369 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1370 * @shost: pointer to host data 1371 * @idx: index to match 1372 * 1373 * Finds the flashnode session object for the passed index 1374 * 1375 * Returns: 1376 * pointer to found flashnode session object on success 1377 * %NULL on failure 1378 */ 1379 static struct iscsi_bus_flash_session * 1380 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1381 { 1382 struct iscsi_bus_flash_session *fnode_sess = NULL; 1383 struct device *dev; 1384 1385 dev = device_find_child(&shost->shost_gendev, &idx, 1386 flashnode_match_index); 1387 if (dev) 1388 fnode_sess = iscsi_dev_to_flash_session(dev); 1389 1390 return fnode_sess; 1391 } 1392 1393 /** 1394 * iscsi_find_flashnode_sess - finds flashnode session entry 1395 * @shost: pointer to host data 1396 * @data: pointer to data containing value to use for comparison 1397 * @fn: function pointer that does actual comparison 1398 * 1399 * Finds the flashnode session object comparing the data passed using logic 1400 * defined in passed function pointer 1401 * 1402 * Returns: 1403 * pointer to found flashnode session device object on success 1404 * %NULL on failure 1405 */ 1406 struct device * 1407 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1408 int (*fn)(struct device *dev, void *data)) 1409 { 1410 return device_find_child(&shost->shost_gendev, data, fn); 1411 } 1412 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1413 1414 /** 1415 * iscsi_find_flashnode_conn - finds flashnode connection entry 1416 * @fnode_sess: pointer to parent flashnode session entry 1417 * 1418 * Finds the flashnode connection object comparing the data passed using logic 1419 * defined in passed function pointer 1420 * 1421 * Returns: 1422 * pointer to found flashnode connection device object on success 1423 * %NULL on failure 1424 */ 1425 struct device * 1426 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1427 { 1428 return device_find_child(&fnode_sess->dev, NULL, 1429 iscsi_is_flashnode_conn_dev); 1430 } 1431 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1432 1433 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1434 { 1435 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1436 return 0; 1437 1438 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1439 } 1440 1441 /** 1442 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1443 * @fnode_sess: pointer to flashnode session entry to be destroyed 1444 * 1445 * Deletes the flashnode session entry and all children flashnode connection 1446 * entries from sysfs 1447 */ 1448 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1449 { 1450 int err; 1451 1452 err = device_for_each_child(&fnode_sess->dev, NULL, 1453 iscsi_iter_destroy_flashnode_conn_fn); 1454 if (err) 1455 pr_err("Could not delete all connections for %s. Error %d.\n", 1456 fnode_sess->dev.kobj.name, err); 1457 1458 device_unregister(&fnode_sess->dev); 1459 } 1460 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1461 1462 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1463 { 1464 if (!iscsi_flashnode_bus_match(dev, NULL)) 1465 return 0; 1466 1467 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1468 return 0; 1469 } 1470 1471 /** 1472 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1473 * @shost: pointer to host data 1474 * 1475 * Destroys all the flashnode session entries and all corresponding children 1476 * flashnode connection entries from sysfs 1477 */ 1478 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1479 { 1480 device_for_each_child(&shost->shost_gendev, NULL, 1481 iscsi_iter_destroy_flashnode_fn); 1482 } 1483 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1484 1485 /* 1486 * BSG support 1487 */ 1488 /** 1489 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1490 * @job: bsg job to be processed 1491 */ 1492 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1493 { 1494 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1495 struct iscsi_bsg_request *req = job->request; 1496 struct iscsi_bsg_reply *reply = job->reply; 1497 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1498 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1499 int ret; 1500 1501 /* check if we have the msgcode value at least */ 1502 if (job->request_len < sizeof(uint32_t)) { 1503 ret = -ENOMSG; 1504 goto fail_host_msg; 1505 } 1506 1507 /* Validate the host command */ 1508 switch (req->msgcode) { 1509 case ISCSI_BSG_HST_VENDOR: 1510 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1511 if ((shost->hostt->vendor_id == 0L) || 1512 (req->rqst_data.h_vendor.vendor_id != 1513 shost->hostt->vendor_id)) { 1514 ret = -ESRCH; 1515 goto fail_host_msg; 1516 } 1517 break; 1518 default: 1519 ret = -EBADR; 1520 goto fail_host_msg; 1521 } 1522 1523 /* check if we really have all the request data needed */ 1524 if (job->request_len < cmdlen) { 1525 ret = -ENOMSG; 1526 goto fail_host_msg; 1527 } 1528 1529 ret = i->iscsi_transport->bsg_request(job); 1530 if (!ret) 1531 return 0; 1532 1533 fail_host_msg: 1534 /* return the errno failure code as the only status */ 1535 BUG_ON(job->reply_len < sizeof(uint32_t)); 1536 reply->reply_payload_rcv_len = 0; 1537 reply->result = ret; 1538 job->reply_len = sizeof(uint32_t); 1539 bsg_job_done(job, ret, 0); 1540 return 0; 1541 } 1542 1543 /** 1544 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1545 * @shost: shost for iscsi_host 1546 * @ihost: iscsi_cls_host adding the structures to 1547 */ 1548 static int 1549 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1550 { 1551 struct device *dev = &shost->shost_gendev; 1552 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1553 struct request_queue *q; 1554 char bsg_name[20]; 1555 1556 if (!i->iscsi_transport->bsg_request) 1557 return -ENOTSUPP; 1558 1559 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1560 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1561 if (IS_ERR(q)) { 1562 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1563 "initialize - no request queue\n"); 1564 return PTR_ERR(q); 1565 } 1566 __scsi_init_queue(shost, q); 1567 1568 ihost->bsg_q = q; 1569 return 0; 1570 } 1571 1572 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1573 struct device *cdev) 1574 { 1575 struct Scsi_Host *shost = dev_to_shost(dev); 1576 struct iscsi_cls_host *ihost = shost->shost_data; 1577 1578 memset(ihost, 0, sizeof(*ihost)); 1579 atomic_set(&ihost->nr_scans, 0); 1580 mutex_init(&ihost->mutex); 1581 1582 iscsi_bsg_host_add(shost, ihost); 1583 /* ignore any bsg add error - we just can't do sgio */ 1584 1585 return 0; 1586 } 1587 1588 static int iscsi_remove_host(struct transport_container *tc, 1589 struct device *dev, struct device *cdev) 1590 { 1591 struct Scsi_Host *shost = dev_to_shost(dev); 1592 struct iscsi_cls_host *ihost = shost->shost_data; 1593 1594 bsg_remove_queue(ihost->bsg_q); 1595 return 0; 1596 } 1597 1598 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1599 "iscsi_host", 1600 iscsi_setup_host, 1601 iscsi_remove_host, 1602 NULL); 1603 1604 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1605 "iscsi_session", 1606 NULL, 1607 NULL, 1608 NULL); 1609 1610 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1611 "iscsi_connection", 1612 NULL, 1613 NULL, 1614 NULL); 1615 1616 static struct sock *nls; 1617 static DEFINE_MUTEX(rx_queue_mutex); 1618 1619 /* 1620 * conn_mutex protects the {start,bind,stop,destroy}_conn from racing 1621 * against the kernel stop_connection recovery mechanism 1622 */ 1623 static DEFINE_MUTEX(conn_mutex); 1624 1625 static LIST_HEAD(sesslist); 1626 static DEFINE_SPINLOCK(sesslock); 1627 static LIST_HEAD(connlist); 1628 static LIST_HEAD(connlist_err); 1629 static DEFINE_SPINLOCK(connlock); 1630 1631 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1632 { 1633 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1634 return sess->sid; 1635 } 1636 1637 /* 1638 * Returns the matching session to a given sid 1639 */ 1640 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1641 { 1642 unsigned long flags; 1643 struct iscsi_cls_session *sess; 1644 1645 spin_lock_irqsave(&sesslock, flags); 1646 list_for_each_entry(sess, &sesslist, sess_list) { 1647 if (sess->sid == sid) { 1648 spin_unlock_irqrestore(&sesslock, flags); 1649 return sess; 1650 } 1651 } 1652 spin_unlock_irqrestore(&sesslock, flags); 1653 return NULL; 1654 } 1655 1656 /* 1657 * Returns the matching connection to a given sid / cid tuple 1658 */ 1659 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1660 { 1661 unsigned long flags; 1662 struct iscsi_cls_conn *conn; 1663 1664 spin_lock_irqsave(&connlock, flags); 1665 list_for_each_entry(conn, &connlist, conn_list) { 1666 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1667 spin_unlock_irqrestore(&connlock, flags); 1668 return conn; 1669 } 1670 } 1671 spin_unlock_irqrestore(&connlock, flags); 1672 return NULL; 1673 } 1674 1675 /* 1676 * The following functions can be used by LLDs that allocate 1677 * their own scsi_hosts or by software iscsi LLDs 1678 */ 1679 static struct { 1680 int value; 1681 char *name; 1682 } iscsi_session_state_names[] = { 1683 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1684 { ISCSI_SESSION_FAILED, "FAILED" }, 1685 { ISCSI_SESSION_FREE, "FREE" }, 1686 }; 1687 1688 static const char *iscsi_session_state_name(int state) 1689 { 1690 int i; 1691 char *name = NULL; 1692 1693 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1694 if (iscsi_session_state_names[i].value == state) { 1695 name = iscsi_session_state_names[i].name; 1696 break; 1697 } 1698 } 1699 return name; 1700 } 1701 1702 int iscsi_session_chkready(struct iscsi_cls_session *session) 1703 { 1704 int err; 1705 1706 switch (session->state) { 1707 case ISCSI_SESSION_LOGGED_IN: 1708 err = 0; 1709 break; 1710 case ISCSI_SESSION_FAILED: 1711 err = DID_IMM_RETRY << 16; 1712 break; 1713 case ISCSI_SESSION_FREE: 1714 err = DID_TRANSPORT_FAILFAST << 16; 1715 break; 1716 default: 1717 err = DID_NO_CONNECT << 16; 1718 break; 1719 } 1720 return err; 1721 } 1722 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1723 1724 int iscsi_is_session_online(struct iscsi_cls_session *session) 1725 { 1726 unsigned long flags; 1727 int ret = 0; 1728 1729 spin_lock_irqsave(&session->lock, flags); 1730 if (session->state == ISCSI_SESSION_LOGGED_IN) 1731 ret = 1; 1732 spin_unlock_irqrestore(&session->lock, flags); 1733 return ret; 1734 } 1735 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1736 1737 static void iscsi_session_release(struct device *dev) 1738 { 1739 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1740 struct Scsi_Host *shost; 1741 1742 shost = iscsi_session_to_shost(session); 1743 scsi_host_put(shost); 1744 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1745 kfree(session); 1746 } 1747 1748 int iscsi_is_session_dev(const struct device *dev) 1749 { 1750 return dev->release == iscsi_session_release; 1751 } 1752 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1753 1754 static int iscsi_iter_session_fn(struct device *dev, void *data) 1755 { 1756 void (* fn) (struct iscsi_cls_session *) = data; 1757 1758 if (!iscsi_is_session_dev(dev)) 1759 return 0; 1760 fn(iscsi_dev_to_session(dev)); 1761 return 0; 1762 } 1763 1764 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1765 void (*fn)(struct iscsi_cls_session *)) 1766 { 1767 device_for_each_child(&shost->shost_gendev, fn, 1768 iscsi_iter_session_fn); 1769 } 1770 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1771 1772 /** 1773 * iscsi_scan_finished - helper to report when running scans are done 1774 * @shost: scsi host 1775 * @time: scan run time 1776 * 1777 * This function can be used by drives like qla4xxx to report to the scsi 1778 * layer when the scans it kicked off at module load time are done. 1779 */ 1780 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) 1781 { 1782 struct iscsi_cls_host *ihost = shost->shost_data; 1783 /* 1784 * qla4xxx will have kicked off some session unblocks before calling 1785 * scsi_scan_host, so just wait for them to complete. 1786 */ 1787 return !atomic_read(&ihost->nr_scans); 1788 } 1789 EXPORT_SYMBOL_GPL(iscsi_scan_finished); 1790 1791 struct iscsi_scan_data { 1792 unsigned int channel; 1793 unsigned int id; 1794 u64 lun; 1795 enum scsi_scan_mode rescan; 1796 }; 1797 1798 static int iscsi_user_scan_session(struct device *dev, void *data) 1799 { 1800 struct iscsi_scan_data *scan_data = data; 1801 struct iscsi_cls_session *session; 1802 struct Scsi_Host *shost; 1803 struct iscsi_cls_host *ihost; 1804 unsigned long flags; 1805 unsigned int id; 1806 1807 if (!iscsi_is_session_dev(dev)) 1808 return 0; 1809 1810 session = iscsi_dev_to_session(dev); 1811 1812 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1813 1814 shost = iscsi_session_to_shost(session); 1815 ihost = shost->shost_data; 1816 1817 mutex_lock(&ihost->mutex); 1818 spin_lock_irqsave(&session->lock, flags); 1819 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1820 spin_unlock_irqrestore(&session->lock, flags); 1821 goto user_scan_exit; 1822 } 1823 id = session->target_id; 1824 spin_unlock_irqrestore(&session->lock, flags); 1825 1826 if (id != ISCSI_MAX_TARGET) { 1827 if ((scan_data->channel == SCAN_WILD_CARD || 1828 scan_data->channel == 0) && 1829 (scan_data->id == SCAN_WILD_CARD || 1830 scan_data->id == id)) 1831 scsi_scan_target(&session->dev, 0, id, 1832 scan_data->lun, scan_data->rescan); 1833 } 1834 1835 user_scan_exit: 1836 mutex_unlock(&ihost->mutex); 1837 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1838 return 0; 1839 } 1840 1841 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1842 uint id, u64 lun) 1843 { 1844 struct iscsi_scan_data scan_data; 1845 1846 scan_data.channel = channel; 1847 scan_data.id = id; 1848 scan_data.lun = lun; 1849 scan_data.rescan = SCSI_SCAN_MANUAL; 1850 1851 return device_for_each_child(&shost->shost_gendev, &scan_data, 1852 iscsi_user_scan_session); 1853 } 1854 1855 static void iscsi_scan_session(struct work_struct *work) 1856 { 1857 struct iscsi_cls_session *session = 1858 container_of(work, struct iscsi_cls_session, scan_work); 1859 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1860 struct iscsi_cls_host *ihost = shost->shost_data; 1861 struct iscsi_scan_data scan_data; 1862 1863 scan_data.channel = 0; 1864 scan_data.id = SCAN_WILD_CARD; 1865 scan_data.lun = SCAN_WILD_CARD; 1866 scan_data.rescan = SCSI_SCAN_RESCAN; 1867 1868 iscsi_user_scan_session(&session->dev, &scan_data); 1869 atomic_dec(&ihost->nr_scans); 1870 } 1871 1872 /** 1873 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1874 * @cmd: scsi cmd passed to scsi eh handler 1875 * 1876 * If the session is down this function will wait for the recovery 1877 * timer to fire or for the session to be logged back in. If the 1878 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1879 * should pass this error value to the scsi eh. 1880 */ 1881 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1882 { 1883 struct iscsi_cls_session *session = 1884 starget_to_session(scsi_target(cmd->device)); 1885 unsigned long flags; 1886 int ret = 0; 1887 1888 spin_lock_irqsave(&session->lock, flags); 1889 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1890 if (session->state == ISCSI_SESSION_FREE) { 1891 ret = FAST_IO_FAIL; 1892 break; 1893 } 1894 spin_unlock_irqrestore(&session->lock, flags); 1895 msleep(1000); 1896 spin_lock_irqsave(&session->lock, flags); 1897 } 1898 spin_unlock_irqrestore(&session->lock, flags); 1899 return ret; 1900 } 1901 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1902 1903 static void session_recovery_timedout(struct work_struct *work) 1904 { 1905 struct iscsi_cls_session *session = 1906 container_of(work, struct iscsi_cls_session, 1907 recovery_work.work); 1908 unsigned long flags; 1909 1910 iscsi_cls_session_printk(KERN_INFO, session, 1911 "session recovery timed out after %d secs\n", 1912 session->recovery_tmo); 1913 1914 spin_lock_irqsave(&session->lock, flags); 1915 switch (session->state) { 1916 case ISCSI_SESSION_FAILED: 1917 session->state = ISCSI_SESSION_FREE; 1918 break; 1919 case ISCSI_SESSION_LOGGED_IN: 1920 case ISCSI_SESSION_FREE: 1921 /* we raced with the unblock's flush */ 1922 spin_unlock_irqrestore(&session->lock, flags); 1923 return; 1924 } 1925 spin_unlock_irqrestore(&session->lock, flags); 1926 1927 if (session->transport->session_recovery_timedout) 1928 session->transport->session_recovery_timedout(session); 1929 1930 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1931 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1932 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1933 } 1934 1935 static void __iscsi_unblock_session(struct work_struct *work) 1936 { 1937 struct iscsi_cls_session *session = 1938 container_of(work, struct iscsi_cls_session, 1939 unblock_work); 1940 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1941 struct iscsi_cls_host *ihost = shost->shost_data; 1942 unsigned long flags; 1943 1944 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1945 /* 1946 * The recovery and unblock work get run from the same workqueue, 1947 * so try to cancel it if it was going to run after this unblock. 1948 */ 1949 cancel_delayed_work(&session->recovery_work); 1950 spin_lock_irqsave(&session->lock, flags); 1951 session->state = ISCSI_SESSION_LOGGED_IN; 1952 spin_unlock_irqrestore(&session->lock, flags); 1953 /* start IO */ 1954 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1955 /* 1956 * Only do kernel scanning if the driver is properly hooked into 1957 * the async scanning code (drivers like iscsi_tcp do login and 1958 * scanning from userspace). 1959 */ 1960 if (shost->hostt->scan_finished) { 1961 if (scsi_queue_work(shost, &session->scan_work)) 1962 atomic_inc(&ihost->nr_scans); 1963 } 1964 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1965 } 1966 1967 /** 1968 * iscsi_unblock_session - set a session as logged in and start IO. 1969 * @session: iscsi session 1970 * 1971 * Mark a session as ready to accept IO. 1972 */ 1973 void iscsi_unblock_session(struct iscsi_cls_session *session) 1974 { 1975 queue_work(iscsi_eh_timer_workq, &session->unblock_work); 1976 /* 1977 * Blocking the session can be done from any context so we only 1978 * queue the block work. Make sure the unblock work has completed 1979 * because it flushes/cancels the other works and updates the state. 1980 */ 1981 flush_work(&session->unblock_work); 1982 } 1983 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1984 1985 static void __iscsi_block_session(struct work_struct *work) 1986 { 1987 struct iscsi_cls_session *session = 1988 container_of(work, struct iscsi_cls_session, 1989 block_work); 1990 unsigned long flags; 1991 1992 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1993 spin_lock_irqsave(&session->lock, flags); 1994 session->state = ISCSI_SESSION_FAILED; 1995 spin_unlock_irqrestore(&session->lock, flags); 1996 scsi_target_block(&session->dev); 1997 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1998 if (session->recovery_tmo >= 0) 1999 queue_delayed_work(iscsi_eh_timer_workq, 2000 &session->recovery_work, 2001 session->recovery_tmo * HZ); 2002 } 2003 2004 void iscsi_block_session(struct iscsi_cls_session *session) 2005 { 2006 queue_work(iscsi_eh_timer_workq, &session->block_work); 2007 } 2008 EXPORT_SYMBOL_GPL(iscsi_block_session); 2009 2010 static void __iscsi_unbind_session(struct work_struct *work) 2011 { 2012 struct iscsi_cls_session *session = 2013 container_of(work, struct iscsi_cls_session, 2014 unbind_work); 2015 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2016 struct iscsi_cls_host *ihost = shost->shost_data; 2017 unsigned long flags; 2018 unsigned int target_id; 2019 2020 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 2021 2022 /* Prevent new scans and make sure scanning is not in progress */ 2023 mutex_lock(&ihost->mutex); 2024 spin_lock_irqsave(&session->lock, flags); 2025 if (session->target_id == ISCSI_MAX_TARGET) { 2026 spin_unlock_irqrestore(&session->lock, flags); 2027 mutex_unlock(&ihost->mutex); 2028 goto unbind_session_exit; 2029 } 2030 2031 target_id = session->target_id; 2032 session->target_id = ISCSI_MAX_TARGET; 2033 spin_unlock_irqrestore(&session->lock, flags); 2034 mutex_unlock(&ihost->mutex); 2035 2036 scsi_remove_target(&session->dev); 2037 2038 if (session->ida_used) 2039 ida_simple_remove(&iscsi_sess_ida, target_id); 2040 2041 unbind_session_exit: 2042 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2043 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2044 } 2045 2046 static void __iscsi_destroy_session(struct work_struct *work) 2047 { 2048 struct iscsi_cls_session *session = 2049 container_of(work, struct iscsi_cls_session, destroy_work); 2050 2051 session->transport->destroy_session(session); 2052 } 2053 2054 struct iscsi_cls_session * 2055 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2056 int dd_size) 2057 { 2058 struct iscsi_cls_session *session; 2059 2060 session = kzalloc(sizeof(*session) + dd_size, 2061 GFP_KERNEL); 2062 if (!session) 2063 return NULL; 2064 2065 session->transport = transport; 2066 session->creator = -1; 2067 session->recovery_tmo = 120; 2068 session->recovery_tmo_sysfs_override = false; 2069 session->state = ISCSI_SESSION_FREE; 2070 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2071 INIT_LIST_HEAD(&session->sess_list); 2072 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2073 INIT_WORK(&session->block_work, __iscsi_block_session); 2074 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2075 INIT_WORK(&session->scan_work, iscsi_scan_session); 2076 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2077 spin_lock_init(&session->lock); 2078 2079 /* this is released in the dev's release function */ 2080 scsi_host_get(shost); 2081 session->dev.parent = &shost->shost_gendev; 2082 session->dev.release = iscsi_session_release; 2083 device_initialize(&session->dev); 2084 if (dd_size) 2085 session->dd_data = &session[1]; 2086 2087 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2088 return session; 2089 } 2090 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2091 2092 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2093 { 2094 unsigned long flags; 2095 int id = 0; 2096 int err; 2097 2098 session->sid = atomic_add_return(1, &iscsi_session_nr); 2099 2100 if (target_id == ISCSI_MAX_TARGET) { 2101 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); 2102 2103 if (id < 0) { 2104 iscsi_cls_session_printk(KERN_ERR, session, 2105 "Failure in Target ID Allocation\n"); 2106 return id; 2107 } 2108 session->target_id = (unsigned int)id; 2109 session->ida_used = true; 2110 } else 2111 session->target_id = target_id; 2112 2113 dev_set_name(&session->dev, "session%u", session->sid); 2114 err = device_add(&session->dev); 2115 if (err) { 2116 iscsi_cls_session_printk(KERN_ERR, session, 2117 "could not register session's dev\n"); 2118 goto release_ida; 2119 } 2120 err = transport_register_device(&session->dev); 2121 if (err) { 2122 iscsi_cls_session_printk(KERN_ERR, session, 2123 "could not register transport's dev\n"); 2124 goto release_dev; 2125 } 2126 2127 spin_lock_irqsave(&sesslock, flags); 2128 list_add(&session->sess_list, &sesslist); 2129 spin_unlock_irqrestore(&sesslock, flags); 2130 2131 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2132 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2133 return 0; 2134 2135 release_dev: 2136 device_del(&session->dev); 2137 release_ida: 2138 if (session->ida_used) 2139 ida_simple_remove(&iscsi_sess_ida, session->target_id); 2140 2141 return err; 2142 } 2143 EXPORT_SYMBOL_GPL(iscsi_add_session); 2144 2145 /** 2146 * iscsi_create_session - create iscsi class session 2147 * @shost: scsi host 2148 * @transport: iscsi transport 2149 * @dd_size: private driver data size 2150 * @target_id: which target 2151 * 2152 * This can be called from a LLD or iscsi_transport. 2153 */ 2154 struct iscsi_cls_session * 2155 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2156 int dd_size, unsigned int target_id) 2157 { 2158 struct iscsi_cls_session *session; 2159 2160 session = iscsi_alloc_session(shost, transport, dd_size); 2161 if (!session) 2162 return NULL; 2163 2164 if (iscsi_add_session(session, target_id)) { 2165 iscsi_free_session(session); 2166 return NULL; 2167 } 2168 return session; 2169 } 2170 EXPORT_SYMBOL_GPL(iscsi_create_session); 2171 2172 static void iscsi_conn_release(struct device *dev) 2173 { 2174 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2175 struct device *parent = conn->dev.parent; 2176 2177 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2178 kfree(conn); 2179 put_device(parent); 2180 } 2181 2182 static int iscsi_is_conn_dev(const struct device *dev) 2183 { 2184 return dev->release == iscsi_conn_release; 2185 } 2186 2187 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2188 { 2189 if (!iscsi_is_conn_dev(dev)) 2190 return 0; 2191 return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); 2192 } 2193 2194 void iscsi_remove_session(struct iscsi_cls_session *session) 2195 { 2196 unsigned long flags; 2197 int err; 2198 2199 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2200 2201 spin_lock_irqsave(&sesslock, flags); 2202 if (!list_empty(&session->sess_list)) 2203 list_del(&session->sess_list); 2204 spin_unlock_irqrestore(&sesslock, flags); 2205 2206 flush_work(&session->block_work); 2207 flush_work(&session->unblock_work); 2208 cancel_delayed_work_sync(&session->recovery_work); 2209 /* 2210 * If we are blocked let commands flow again. The lld or iscsi 2211 * layer should set up the queuecommand to fail commands. 2212 * We assume that LLD will not be calling block/unblock while 2213 * removing the session. 2214 */ 2215 spin_lock_irqsave(&session->lock, flags); 2216 session->state = ISCSI_SESSION_FREE; 2217 spin_unlock_irqrestore(&session->lock, flags); 2218 2219 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2220 /* flush running scans then delete devices */ 2221 flush_work(&session->scan_work); 2222 /* flush running unbind operations */ 2223 flush_work(&session->unbind_work); 2224 __iscsi_unbind_session(&session->unbind_work); 2225 2226 /* hw iscsi may not have removed all connections from session */ 2227 err = device_for_each_child(&session->dev, NULL, 2228 iscsi_iter_destroy_conn_fn); 2229 if (err) 2230 iscsi_cls_session_printk(KERN_ERR, session, 2231 "Could not delete all connections " 2232 "for session. Error %d.\n", err); 2233 2234 transport_unregister_device(&session->dev); 2235 2236 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2237 device_del(&session->dev); 2238 } 2239 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2240 2241 void iscsi_free_session(struct iscsi_cls_session *session) 2242 { 2243 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2244 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2245 put_device(&session->dev); 2246 } 2247 EXPORT_SYMBOL_GPL(iscsi_free_session); 2248 2249 /** 2250 * iscsi_create_conn - create iscsi class connection 2251 * @session: iscsi cls session 2252 * @dd_size: private driver data size 2253 * @cid: connection id 2254 * 2255 * This can be called from a LLD or iscsi_transport. The connection 2256 * is child of the session so cid must be unique for all connections 2257 * on the session. 2258 * 2259 * Since we do not support MCS, cid will normally be zero. In some cases 2260 * for software iscsi we could be trying to preallocate a connection struct 2261 * in which case there could be two connection structs and cid would be 2262 * non-zero. 2263 */ 2264 struct iscsi_cls_conn * 2265 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2266 { 2267 struct iscsi_transport *transport = session->transport; 2268 struct iscsi_cls_conn *conn; 2269 unsigned long flags; 2270 int err; 2271 2272 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2273 if (!conn) 2274 return NULL; 2275 if (dd_size) 2276 conn->dd_data = &conn[1]; 2277 2278 mutex_init(&conn->ep_mutex); 2279 INIT_LIST_HEAD(&conn->conn_list); 2280 INIT_LIST_HEAD(&conn->conn_list_err); 2281 conn->transport = transport; 2282 conn->cid = cid; 2283 conn->state = ISCSI_CONN_DOWN; 2284 2285 /* this is released in the dev's release function */ 2286 if (!get_device(&session->dev)) 2287 goto free_conn; 2288 2289 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2290 conn->dev.parent = &session->dev; 2291 conn->dev.release = iscsi_conn_release; 2292 err = device_register(&conn->dev); 2293 if (err) { 2294 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2295 "register connection's dev\n"); 2296 goto release_parent_ref; 2297 } 2298 err = transport_register_device(&conn->dev); 2299 if (err) { 2300 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2301 "register transport's dev\n"); 2302 goto release_conn_ref; 2303 } 2304 2305 spin_lock_irqsave(&connlock, flags); 2306 list_add(&conn->conn_list, &connlist); 2307 spin_unlock_irqrestore(&connlock, flags); 2308 2309 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); 2310 return conn; 2311 2312 release_conn_ref: 2313 device_unregister(&conn->dev); 2314 put_device(&session->dev); 2315 return NULL; 2316 release_parent_ref: 2317 put_device(&session->dev); 2318 free_conn: 2319 kfree(conn); 2320 return NULL; 2321 } 2322 2323 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2324 2325 /** 2326 * iscsi_destroy_conn - destroy iscsi class connection 2327 * @conn: iscsi cls session 2328 * 2329 * This can be called from a LLD or iscsi_transport. 2330 */ 2331 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2332 { 2333 unsigned long flags; 2334 2335 spin_lock_irqsave(&connlock, flags); 2336 list_del(&conn->conn_list); 2337 list_del(&conn->conn_list_err); 2338 spin_unlock_irqrestore(&connlock, flags); 2339 2340 transport_unregister_device(&conn->dev); 2341 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2342 device_unregister(&conn->dev); 2343 return 0; 2344 } 2345 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2346 2347 /* 2348 * iscsi interface functions 2349 */ 2350 static struct iscsi_internal * 2351 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2352 { 2353 struct iscsi_internal *priv; 2354 unsigned long flags; 2355 2356 spin_lock_irqsave(&iscsi_transport_lock, flags); 2357 list_for_each_entry(priv, &iscsi_transports, list) { 2358 if (tt == priv->iscsi_transport) { 2359 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2360 return priv; 2361 } 2362 } 2363 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2364 return NULL; 2365 } 2366 2367 static int 2368 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2369 { 2370 return nlmsg_multicast(nls, skb, 0, group, gfp); 2371 } 2372 2373 static int 2374 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2375 { 2376 return nlmsg_unicast(nls, skb, portid); 2377 } 2378 2379 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2380 char *data, uint32_t data_size) 2381 { 2382 struct nlmsghdr *nlh; 2383 struct sk_buff *skb; 2384 struct iscsi_uevent *ev; 2385 char *pdu; 2386 struct iscsi_internal *priv; 2387 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2388 data_size); 2389 2390 priv = iscsi_if_transport_lookup(conn->transport); 2391 if (!priv) 2392 return -EINVAL; 2393 2394 skb = alloc_skb(len, GFP_ATOMIC); 2395 if (!skb) { 2396 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2397 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2398 "control PDU: OOM\n"); 2399 return -ENOMEM; 2400 } 2401 2402 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2403 ev = nlmsg_data(nlh); 2404 memset(ev, 0, sizeof(*ev)); 2405 ev->transport_handle = iscsi_handle(conn->transport); 2406 ev->type = ISCSI_KEVENT_RECV_PDU; 2407 ev->r.recv_req.cid = conn->cid; 2408 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2409 pdu = (char*)ev + sizeof(*ev); 2410 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2411 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2412 2413 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2414 } 2415 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2416 2417 int iscsi_offload_mesg(struct Scsi_Host *shost, 2418 struct iscsi_transport *transport, uint32_t type, 2419 char *data, uint16_t data_size) 2420 { 2421 struct nlmsghdr *nlh; 2422 struct sk_buff *skb; 2423 struct iscsi_uevent *ev; 2424 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2425 2426 skb = alloc_skb(len, GFP_ATOMIC); 2427 if (!skb) { 2428 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2429 return -ENOMEM; 2430 } 2431 2432 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2433 ev = nlmsg_data(nlh); 2434 memset(ev, 0, sizeof(*ev)); 2435 ev->type = type; 2436 ev->transport_handle = iscsi_handle(transport); 2437 switch (type) { 2438 case ISCSI_KEVENT_PATH_REQ: 2439 ev->r.req_path.host_no = shost->host_no; 2440 break; 2441 case ISCSI_KEVENT_IF_DOWN: 2442 ev->r.notify_if_down.host_no = shost->host_no; 2443 break; 2444 } 2445 2446 memcpy((char *)ev + sizeof(*ev), data, data_size); 2447 2448 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2449 } 2450 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2451 2452 /* 2453 * This can be called without the rx_queue_mutex, if invoked by the kernel 2454 * stop work. But, in that case, it is guaranteed not to race with 2455 * iscsi_destroy by conn_mutex. 2456 */ 2457 static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2458 { 2459 /* 2460 * It is important that this path doesn't rely on 2461 * rx_queue_mutex, otherwise, a thread doing allocation on a 2462 * start_session/start_connection could sleep waiting on a 2463 * writeback to a failed iscsi device, that cannot be recovered 2464 * because the lock is held. If we don't hold it here, the 2465 * kernel stop_conn_work_fn has a chance to stop the broken 2466 * session and resolve the allocation. 2467 * 2468 * Still, the user invoked .stop_conn() needs to be serialized 2469 * with stop_conn_work_fn by a private mutex. Not pretty, but 2470 * it works. 2471 */ 2472 mutex_lock(&conn_mutex); 2473 conn->transport->stop_conn(conn, flag); 2474 mutex_unlock(&conn_mutex); 2475 2476 } 2477 2478 static void stop_conn_work_fn(struct work_struct *work) 2479 { 2480 struct iscsi_cls_conn *conn, *tmp; 2481 unsigned long flags; 2482 LIST_HEAD(recovery_list); 2483 2484 spin_lock_irqsave(&connlock, flags); 2485 if (list_empty(&connlist_err)) { 2486 spin_unlock_irqrestore(&connlock, flags); 2487 return; 2488 } 2489 list_splice_init(&connlist_err, &recovery_list); 2490 spin_unlock_irqrestore(&connlock, flags); 2491 2492 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) { 2493 uint32_t sid = iscsi_conn_get_sid(conn); 2494 struct iscsi_cls_session *session; 2495 2496 session = iscsi_session_lookup(sid); 2497 if (session) { 2498 if (system_state != SYSTEM_RUNNING) { 2499 session->recovery_tmo = 0; 2500 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2501 } else { 2502 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER); 2503 } 2504 } 2505 2506 list_del_init(&conn->conn_list_err); 2507 } 2508 } 2509 2510 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2511 { 2512 struct nlmsghdr *nlh; 2513 struct sk_buff *skb; 2514 struct iscsi_uevent *ev; 2515 struct iscsi_internal *priv; 2516 int len = nlmsg_total_size(sizeof(*ev)); 2517 unsigned long flags; 2518 2519 spin_lock_irqsave(&connlock, flags); 2520 list_add(&conn->conn_list_err, &connlist_err); 2521 spin_unlock_irqrestore(&connlock, flags); 2522 queue_work(system_unbound_wq, &stop_conn_work); 2523 2524 priv = iscsi_if_transport_lookup(conn->transport); 2525 if (!priv) 2526 return; 2527 2528 skb = alloc_skb(len, GFP_ATOMIC); 2529 if (!skb) { 2530 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2531 "conn error (%d)\n", error); 2532 return; 2533 } 2534 2535 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2536 ev = nlmsg_data(nlh); 2537 ev->transport_handle = iscsi_handle(conn->transport); 2538 ev->type = ISCSI_KEVENT_CONN_ERROR; 2539 ev->r.connerror.error = error; 2540 ev->r.connerror.cid = conn->cid; 2541 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2542 2543 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2544 2545 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2546 error); 2547 } 2548 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2549 2550 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2551 enum iscsi_conn_state state) 2552 { 2553 struct nlmsghdr *nlh; 2554 struct sk_buff *skb; 2555 struct iscsi_uevent *ev; 2556 struct iscsi_internal *priv; 2557 int len = nlmsg_total_size(sizeof(*ev)); 2558 2559 priv = iscsi_if_transport_lookup(conn->transport); 2560 if (!priv) 2561 return; 2562 2563 skb = alloc_skb(len, GFP_ATOMIC); 2564 if (!skb) { 2565 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2566 "conn login (%d)\n", state); 2567 return; 2568 } 2569 2570 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2571 ev = nlmsg_data(nlh); 2572 ev->transport_handle = iscsi_handle(conn->transport); 2573 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2574 ev->r.conn_login.state = state; 2575 ev->r.conn_login.cid = conn->cid; 2576 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2577 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2578 2579 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2580 state); 2581 } 2582 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2583 2584 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2585 enum iscsi_host_event_code code, uint32_t data_size, 2586 uint8_t *data) 2587 { 2588 struct nlmsghdr *nlh; 2589 struct sk_buff *skb; 2590 struct iscsi_uevent *ev; 2591 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2592 2593 skb = alloc_skb(len, GFP_NOIO); 2594 if (!skb) { 2595 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2596 host_no, code); 2597 return; 2598 } 2599 2600 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2601 ev = nlmsg_data(nlh); 2602 ev->transport_handle = iscsi_handle(transport); 2603 ev->type = ISCSI_KEVENT_HOST_EVENT; 2604 ev->r.host_event.host_no = host_no; 2605 ev->r.host_event.code = code; 2606 ev->r.host_event.data_size = data_size; 2607 2608 if (data_size) 2609 memcpy((char *)ev + sizeof(*ev), data, data_size); 2610 2611 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2612 } 2613 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2614 2615 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2616 uint32_t status, uint32_t pid, uint32_t data_size, 2617 uint8_t *data) 2618 { 2619 struct nlmsghdr *nlh; 2620 struct sk_buff *skb; 2621 struct iscsi_uevent *ev; 2622 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2623 2624 skb = alloc_skb(len, GFP_NOIO); 2625 if (!skb) { 2626 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2627 return; 2628 } 2629 2630 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2631 ev = nlmsg_data(nlh); 2632 ev->transport_handle = iscsi_handle(transport); 2633 ev->type = ISCSI_KEVENT_PING_COMP; 2634 ev->r.ping_comp.host_no = host_no; 2635 ev->r.ping_comp.status = status; 2636 ev->r.ping_comp.pid = pid; 2637 ev->r.ping_comp.data_size = data_size; 2638 memcpy((char *)ev + sizeof(*ev), data, data_size); 2639 2640 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2641 } 2642 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2643 2644 static int 2645 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2646 { 2647 struct sk_buff *skb; 2648 struct nlmsghdr *nlh; 2649 int len = nlmsg_total_size(size); 2650 2651 skb = alloc_skb(len, GFP_ATOMIC); 2652 if (!skb) { 2653 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2654 return -ENOMEM; 2655 } 2656 2657 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2658 memcpy(nlmsg_data(nlh), payload, size); 2659 return iscsi_unicast_skb(skb, portid); 2660 } 2661 2662 static int 2663 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2664 { 2665 struct iscsi_uevent *ev = nlmsg_data(nlh); 2666 struct iscsi_stats *stats; 2667 struct sk_buff *skbstat; 2668 struct iscsi_cls_conn *conn; 2669 struct nlmsghdr *nlhstat; 2670 struct iscsi_uevent *evstat; 2671 struct iscsi_internal *priv; 2672 int len = nlmsg_total_size(sizeof(*ev) + 2673 sizeof(struct iscsi_stats) + 2674 sizeof(struct iscsi_stats_custom) * 2675 ISCSI_STATS_CUSTOM_MAX); 2676 int err = 0; 2677 2678 priv = iscsi_if_transport_lookup(transport); 2679 if (!priv) 2680 return -EINVAL; 2681 2682 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2683 if (!conn) 2684 return -EEXIST; 2685 2686 do { 2687 int actual_size; 2688 2689 skbstat = alloc_skb(len, GFP_ATOMIC); 2690 if (!skbstat) { 2691 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2692 "deliver stats: OOM\n"); 2693 return -ENOMEM; 2694 } 2695 2696 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2697 (len - sizeof(*nlhstat)), 0); 2698 evstat = nlmsg_data(nlhstat); 2699 memset(evstat, 0, sizeof(*evstat)); 2700 evstat->transport_handle = iscsi_handle(conn->transport); 2701 evstat->type = nlh->nlmsg_type; 2702 evstat->u.get_stats.cid = 2703 ev->u.get_stats.cid; 2704 evstat->u.get_stats.sid = 2705 ev->u.get_stats.sid; 2706 stats = (struct iscsi_stats *) 2707 ((char*)evstat + sizeof(*evstat)); 2708 memset(stats, 0, sizeof(*stats)); 2709 2710 transport->get_stats(conn, stats); 2711 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2712 sizeof(struct iscsi_stats) + 2713 sizeof(struct iscsi_stats_custom) * 2714 stats->custom_length); 2715 actual_size -= sizeof(*nlhstat); 2716 actual_size = nlmsg_msg_size(actual_size); 2717 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2718 nlhstat->nlmsg_len = actual_size; 2719 2720 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2721 GFP_ATOMIC); 2722 } while (err < 0 && err != -ECONNREFUSED); 2723 2724 return err; 2725 } 2726 2727 /** 2728 * iscsi_session_event - send session destr. completion event 2729 * @session: iscsi class session 2730 * @event: type of event 2731 */ 2732 int iscsi_session_event(struct iscsi_cls_session *session, 2733 enum iscsi_uevent_e event) 2734 { 2735 struct iscsi_internal *priv; 2736 struct Scsi_Host *shost; 2737 struct iscsi_uevent *ev; 2738 struct sk_buff *skb; 2739 struct nlmsghdr *nlh; 2740 int rc, len = nlmsg_total_size(sizeof(*ev)); 2741 2742 priv = iscsi_if_transport_lookup(session->transport); 2743 if (!priv) 2744 return -EINVAL; 2745 shost = iscsi_session_to_shost(session); 2746 2747 skb = alloc_skb(len, GFP_KERNEL); 2748 if (!skb) { 2749 iscsi_cls_session_printk(KERN_ERR, session, 2750 "Cannot notify userspace of session " 2751 "event %u\n", event); 2752 return -ENOMEM; 2753 } 2754 2755 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2756 ev = nlmsg_data(nlh); 2757 ev->transport_handle = iscsi_handle(session->transport); 2758 2759 ev->type = event; 2760 switch (event) { 2761 case ISCSI_KEVENT_DESTROY_SESSION: 2762 ev->r.d_session.host_no = shost->host_no; 2763 ev->r.d_session.sid = session->sid; 2764 break; 2765 case ISCSI_KEVENT_CREATE_SESSION: 2766 ev->r.c_session_ret.host_no = shost->host_no; 2767 ev->r.c_session_ret.sid = session->sid; 2768 break; 2769 case ISCSI_KEVENT_UNBIND_SESSION: 2770 ev->r.unbind_session.host_no = shost->host_no; 2771 ev->r.unbind_session.sid = session->sid; 2772 break; 2773 default: 2774 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2775 "%u.\n", event); 2776 kfree_skb(skb); 2777 return -EINVAL; 2778 } 2779 2780 /* 2781 * this will occur if the daemon is not up, so we just warn 2782 * the user and when the daemon is restarted it will handle it 2783 */ 2784 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2785 if (rc == -ESRCH) 2786 iscsi_cls_session_printk(KERN_ERR, session, 2787 "Cannot notify userspace of session " 2788 "event %u. Check iscsi daemon\n", 2789 event); 2790 2791 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2792 event, rc); 2793 return rc; 2794 } 2795 EXPORT_SYMBOL_GPL(iscsi_session_event); 2796 2797 static int 2798 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2799 struct iscsi_uevent *ev, pid_t pid, 2800 uint32_t initial_cmdsn, uint16_t cmds_max, 2801 uint16_t queue_depth) 2802 { 2803 struct iscsi_transport *transport = priv->iscsi_transport; 2804 struct iscsi_cls_session *session; 2805 struct Scsi_Host *shost; 2806 2807 session = transport->create_session(ep, cmds_max, queue_depth, 2808 initial_cmdsn); 2809 if (!session) 2810 return -ENOMEM; 2811 2812 session->creator = pid; 2813 shost = iscsi_session_to_shost(session); 2814 ev->r.c_session_ret.host_no = shost->host_no; 2815 ev->r.c_session_ret.sid = session->sid; 2816 ISCSI_DBG_TRANS_SESSION(session, 2817 "Completed creating transport session\n"); 2818 return 0; 2819 } 2820 2821 static int 2822 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2823 { 2824 struct iscsi_cls_conn *conn; 2825 struct iscsi_cls_session *session; 2826 2827 session = iscsi_session_lookup(ev->u.c_conn.sid); 2828 if (!session) { 2829 printk(KERN_ERR "iscsi: invalid session %d.\n", 2830 ev->u.c_conn.sid); 2831 return -EINVAL; 2832 } 2833 2834 conn = transport->create_conn(session, ev->u.c_conn.cid); 2835 if (!conn) { 2836 iscsi_cls_session_printk(KERN_ERR, session, 2837 "couldn't create a new connection."); 2838 return -ENOMEM; 2839 } 2840 2841 ev->r.c_conn_ret.sid = session->sid; 2842 ev->r.c_conn_ret.cid = conn->cid; 2843 2844 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2845 return 0; 2846 } 2847 2848 static int 2849 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2850 { 2851 struct iscsi_cls_conn *conn; 2852 unsigned long flags; 2853 2854 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2855 if (!conn) 2856 return -EINVAL; 2857 2858 spin_lock_irqsave(&connlock, flags); 2859 if (!list_empty(&conn->conn_list_err)) { 2860 spin_unlock_irqrestore(&connlock, flags); 2861 return -EAGAIN; 2862 } 2863 spin_unlock_irqrestore(&connlock, flags); 2864 2865 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2866 2867 mutex_lock(&conn_mutex); 2868 if (transport->destroy_conn) 2869 transport->destroy_conn(conn); 2870 mutex_unlock(&conn_mutex); 2871 2872 return 0; 2873 } 2874 2875 static int 2876 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2877 { 2878 char *data = (char*)ev + sizeof(*ev); 2879 struct iscsi_cls_conn *conn; 2880 struct iscsi_cls_session *session; 2881 int err = 0, value = 0; 2882 2883 session = iscsi_session_lookup(ev->u.set_param.sid); 2884 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2885 if (!conn || !session) 2886 return -EINVAL; 2887 2888 switch (ev->u.set_param.param) { 2889 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2890 sscanf(data, "%d", &value); 2891 if (!session->recovery_tmo_sysfs_override) 2892 session->recovery_tmo = value; 2893 break; 2894 default: 2895 err = transport->set_param(conn, ev->u.set_param.param, 2896 data, ev->u.set_param.len); 2897 } 2898 2899 return err; 2900 } 2901 2902 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2903 struct iscsi_uevent *ev, int msg_type) 2904 { 2905 struct iscsi_endpoint *ep; 2906 struct sockaddr *dst_addr; 2907 struct Scsi_Host *shost = NULL; 2908 int non_blocking, err = 0; 2909 2910 if (!transport->ep_connect) 2911 return -EINVAL; 2912 2913 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2914 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2915 if (!shost) { 2916 printk(KERN_ERR "ep connect failed. Could not find " 2917 "host no %u\n", 2918 ev->u.ep_connect_through_host.host_no); 2919 return -ENODEV; 2920 } 2921 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2922 } else 2923 non_blocking = ev->u.ep_connect.non_blocking; 2924 2925 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2926 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2927 if (IS_ERR(ep)) { 2928 err = PTR_ERR(ep); 2929 goto release_host; 2930 } 2931 2932 ev->r.ep_connect_ret.handle = ep->id; 2933 release_host: 2934 if (shost) 2935 scsi_host_put(shost); 2936 return err; 2937 } 2938 2939 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2940 u64 ep_handle) 2941 { 2942 struct iscsi_cls_conn *conn; 2943 struct iscsi_endpoint *ep; 2944 2945 if (!transport->ep_disconnect) 2946 return -EINVAL; 2947 2948 ep = iscsi_lookup_endpoint(ep_handle); 2949 if (!ep) 2950 return -EINVAL; 2951 conn = ep->conn; 2952 if (conn) { 2953 mutex_lock(&conn->ep_mutex); 2954 conn->ep = NULL; 2955 mutex_unlock(&conn->ep_mutex); 2956 } 2957 2958 transport->ep_disconnect(ep); 2959 return 0; 2960 } 2961 2962 static int 2963 iscsi_if_transport_ep(struct iscsi_transport *transport, 2964 struct iscsi_uevent *ev, int msg_type) 2965 { 2966 struct iscsi_endpoint *ep; 2967 int rc = 0; 2968 2969 switch (msg_type) { 2970 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2971 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2972 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2973 break; 2974 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2975 if (!transport->ep_poll) 2976 return -EINVAL; 2977 2978 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2979 if (!ep) 2980 return -EINVAL; 2981 2982 ev->r.retcode = transport->ep_poll(ep, 2983 ev->u.ep_poll.timeout_ms); 2984 break; 2985 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 2986 rc = iscsi_if_ep_disconnect(transport, 2987 ev->u.ep_disconnect.ep_handle); 2988 break; 2989 } 2990 return rc; 2991 } 2992 2993 static int 2994 iscsi_tgt_dscvr(struct iscsi_transport *transport, 2995 struct iscsi_uevent *ev) 2996 { 2997 struct Scsi_Host *shost; 2998 struct sockaddr *dst_addr; 2999 int err; 3000 3001 if (!transport->tgt_dscvr) 3002 return -EINVAL; 3003 3004 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3005 if (!shost) { 3006 printk(KERN_ERR "target discovery could not find host no %u\n", 3007 ev->u.tgt_dscvr.host_no); 3008 return -ENODEV; 3009 } 3010 3011 3012 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3013 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3014 ev->u.tgt_dscvr.enable, dst_addr); 3015 scsi_host_put(shost); 3016 return err; 3017 } 3018 3019 static int 3020 iscsi_set_host_param(struct iscsi_transport *transport, 3021 struct iscsi_uevent *ev) 3022 { 3023 char *data = (char*)ev + sizeof(*ev); 3024 struct Scsi_Host *shost; 3025 int err; 3026 3027 if (!transport->set_host_param) 3028 return -ENOSYS; 3029 3030 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3031 if (!shost) { 3032 printk(KERN_ERR "set_host_param could not find host no %u\n", 3033 ev->u.set_host_param.host_no); 3034 return -ENODEV; 3035 } 3036 3037 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3038 data, ev->u.set_host_param.len); 3039 scsi_host_put(shost); 3040 return err; 3041 } 3042 3043 static int 3044 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3045 { 3046 struct Scsi_Host *shost; 3047 struct iscsi_path *params; 3048 int err; 3049 3050 if (!transport->set_path) 3051 return -ENOSYS; 3052 3053 shost = scsi_host_lookup(ev->u.set_path.host_no); 3054 if (!shost) { 3055 printk(KERN_ERR "set path could not find host no %u\n", 3056 ev->u.set_path.host_no); 3057 return -ENODEV; 3058 } 3059 3060 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3061 err = transport->set_path(shost, params); 3062 3063 scsi_host_put(shost); 3064 return err; 3065 } 3066 3067 static int iscsi_session_has_conns(int sid) 3068 { 3069 struct iscsi_cls_conn *conn; 3070 unsigned long flags; 3071 int found = 0; 3072 3073 spin_lock_irqsave(&connlock, flags); 3074 list_for_each_entry(conn, &connlist, conn_list) { 3075 if (iscsi_conn_get_sid(conn) == sid) { 3076 found = 1; 3077 break; 3078 } 3079 } 3080 spin_unlock_irqrestore(&connlock, flags); 3081 3082 return found; 3083 } 3084 3085 static int 3086 iscsi_set_iface_params(struct iscsi_transport *transport, 3087 struct iscsi_uevent *ev, uint32_t len) 3088 { 3089 char *data = (char *)ev + sizeof(*ev); 3090 struct Scsi_Host *shost; 3091 int err; 3092 3093 if (!transport->set_iface_param) 3094 return -ENOSYS; 3095 3096 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3097 if (!shost) { 3098 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3099 ev->u.set_iface_params.host_no); 3100 return -ENODEV; 3101 } 3102 3103 err = transport->set_iface_param(shost, data, len); 3104 scsi_host_put(shost); 3105 return err; 3106 } 3107 3108 static int 3109 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3110 { 3111 struct Scsi_Host *shost; 3112 struct sockaddr *dst_addr; 3113 int err; 3114 3115 if (!transport->send_ping) 3116 return -ENOSYS; 3117 3118 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3119 if (!shost) { 3120 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3121 ev->u.iscsi_ping.host_no); 3122 return -ENODEV; 3123 } 3124 3125 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3126 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3127 ev->u.iscsi_ping.iface_type, 3128 ev->u.iscsi_ping.payload_size, 3129 ev->u.iscsi_ping.pid, 3130 dst_addr); 3131 scsi_host_put(shost); 3132 return err; 3133 } 3134 3135 static int 3136 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3137 { 3138 struct iscsi_uevent *ev = nlmsg_data(nlh); 3139 struct Scsi_Host *shost = NULL; 3140 struct iscsi_chap_rec *chap_rec; 3141 struct iscsi_internal *priv; 3142 struct sk_buff *skbchap; 3143 struct nlmsghdr *nlhchap; 3144 struct iscsi_uevent *evchap; 3145 uint32_t chap_buf_size; 3146 int len, err = 0; 3147 char *buf; 3148 3149 if (!transport->get_chap) 3150 return -EINVAL; 3151 3152 priv = iscsi_if_transport_lookup(transport); 3153 if (!priv) 3154 return -EINVAL; 3155 3156 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3157 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3158 3159 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3160 if (!shost) { 3161 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3162 __func__, ev->u.get_chap.host_no); 3163 return -ENODEV; 3164 } 3165 3166 do { 3167 int actual_size; 3168 3169 skbchap = alloc_skb(len, GFP_KERNEL); 3170 if (!skbchap) { 3171 printk(KERN_ERR "can not deliver chap: OOM\n"); 3172 err = -ENOMEM; 3173 goto exit_get_chap; 3174 } 3175 3176 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3177 (len - sizeof(*nlhchap)), 0); 3178 evchap = nlmsg_data(nlhchap); 3179 memset(evchap, 0, sizeof(*evchap)); 3180 evchap->transport_handle = iscsi_handle(transport); 3181 evchap->type = nlh->nlmsg_type; 3182 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3183 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3184 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3185 buf = (char *)evchap + sizeof(*evchap); 3186 memset(buf, 0, chap_buf_size); 3187 3188 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3189 &evchap->u.get_chap.num_entries, buf); 3190 3191 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3192 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3193 nlhchap->nlmsg_len = actual_size; 3194 3195 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3196 GFP_KERNEL); 3197 } while (err < 0 && err != -ECONNREFUSED); 3198 3199 exit_get_chap: 3200 scsi_host_put(shost); 3201 return err; 3202 } 3203 3204 static int iscsi_set_chap(struct iscsi_transport *transport, 3205 struct iscsi_uevent *ev, uint32_t len) 3206 { 3207 char *data = (char *)ev + sizeof(*ev); 3208 struct Scsi_Host *shost; 3209 int err = 0; 3210 3211 if (!transport->set_chap) 3212 return -ENOSYS; 3213 3214 shost = scsi_host_lookup(ev->u.set_path.host_no); 3215 if (!shost) { 3216 pr_err("%s could not find host no %u\n", 3217 __func__, ev->u.set_path.host_no); 3218 return -ENODEV; 3219 } 3220 3221 err = transport->set_chap(shost, data, len); 3222 scsi_host_put(shost); 3223 return err; 3224 } 3225 3226 static int iscsi_delete_chap(struct iscsi_transport *transport, 3227 struct iscsi_uevent *ev) 3228 { 3229 struct Scsi_Host *shost; 3230 int err = 0; 3231 3232 if (!transport->delete_chap) 3233 return -ENOSYS; 3234 3235 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3236 if (!shost) { 3237 printk(KERN_ERR "%s could not find host no %u\n", 3238 __func__, ev->u.delete_chap.host_no); 3239 return -ENODEV; 3240 } 3241 3242 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3243 scsi_host_put(shost); 3244 return err; 3245 } 3246 3247 static const struct { 3248 enum iscsi_discovery_parent_type value; 3249 char *name; 3250 } iscsi_discovery_parent_names[] = { 3251 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3252 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3253 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3254 }; 3255 3256 char *iscsi_get_discovery_parent_name(int parent_type) 3257 { 3258 int i; 3259 char *state = "Unknown!"; 3260 3261 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3262 if (iscsi_discovery_parent_names[i].value & parent_type) { 3263 state = iscsi_discovery_parent_names[i].name; 3264 break; 3265 } 3266 } 3267 return state; 3268 } 3269 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3270 3271 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3272 struct iscsi_uevent *ev, uint32_t len) 3273 { 3274 char *data = (char *)ev + sizeof(*ev); 3275 struct Scsi_Host *shost; 3276 struct iscsi_bus_flash_session *fnode_sess; 3277 struct iscsi_bus_flash_conn *fnode_conn; 3278 struct device *dev; 3279 uint32_t idx; 3280 int err = 0; 3281 3282 if (!transport->set_flashnode_param) { 3283 err = -ENOSYS; 3284 goto exit_set_fnode; 3285 } 3286 3287 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3288 if (!shost) { 3289 pr_err("%s could not find host no %u\n", 3290 __func__, ev->u.set_flashnode.host_no); 3291 err = -ENODEV; 3292 goto exit_set_fnode; 3293 } 3294 3295 idx = ev->u.set_flashnode.flashnode_idx; 3296 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3297 if (!fnode_sess) { 3298 pr_err("%s could not find flashnode %u for host no %u\n", 3299 __func__, idx, ev->u.set_flashnode.host_no); 3300 err = -ENODEV; 3301 goto put_host; 3302 } 3303 3304 dev = iscsi_find_flashnode_conn(fnode_sess); 3305 if (!dev) { 3306 err = -ENODEV; 3307 goto put_sess; 3308 } 3309 3310 fnode_conn = iscsi_dev_to_flash_conn(dev); 3311 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3312 put_device(dev); 3313 3314 put_sess: 3315 put_device(&fnode_sess->dev); 3316 3317 put_host: 3318 scsi_host_put(shost); 3319 3320 exit_set_fnode: 3321 return err; 3322 } 3323 3324 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3325 struct iscsi_uevent *ev, uint32_t len) 3326 { 3327 char *data = (char *)ev + sizeof(*ev); 3328 struct Scsi_Host *shost; 3329 int index; 3330 int err = 0; 3331 3332 if (!transport->new_flashnode) { 3333 err = -ENOSYS; 3334 goto exit_new_fnode; 3335 } 3336 3337 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3338 if (!shost) { 3339 pr_err("%s could not find host no %u\n", 3340 __func__, ev->u.new_flashnode.host_no); 3341 err = -ENODEV; 3342 goto put_host; 3343 } 3344 3345 index = transport->new_flashnode(shost, data, len); 3346 3347 if (index >= 0) 3348 ev->r.new_flashnode_ret.flashnode_idx = index; 3349 else 3350 err = -EIO; 3351 3352 put_host: 3353 scsi_host_put(shost); 3354 3355 exit_new_fnode: 3356 return err; 3357 } 3358 3359 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3360 struct iscsi_uevent *ev) 3361 { 3362 struct Scsi_Host *shost; 3363 struct iscsi_bus_flash_session *fnode_sess; 3364 uint32_t idx; 3365 int err = 0; 3366 3367 if (!transport->del_flashnode) { 3368 err = -ENOSYS; 3369 goto exit_del_fnode; 3370 } 3371 3372 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3373 if (!shost) { 3374 pr_err("%s could not find host no %u\n", 3375 __func__, ev->u.del_flashnode.host_no); 3376 err = -ENODEV; 3377 goto put_host; 3378 } 3379 3380 idx = ev->u.del_flashnode.flashnode_idx; 3381 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3382 if (!fnode_sess) { 3383 pr_err("%s could not find flashnode %u for host no %u\n", 3384 __func__, idx, ev->u.del_flashnode.host_no); 3385 err = -ENODEV; 3386 goto put_host; 3387 } 3388 3389 err = transport->del_flashnode(fnode_sess); 3390 put_device(&fnode_sess->dev); 3391 3392 put_host: 3393 scsi_host_put(shost); 3394 3395 exit_del_fnode: 3396 return err; 3397 } 3398 3399 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3400 struct iscsi_uevent *ev) 3401 { 3402 struct Scsi_Host *shost; 3403 struct iscsi_bus_flash_session *fnode_sess; 3404 struct iscsi_bus_flash_conn *fnode_conn; 3405 struct device *dev; 3406 uint32_t idx; 3407 int err = 0; 3408 3409 if (!transport->login_flashnode) { 3410 err = -ENOSYS; 3411 goto exit_login_fnode; 3412 } 3413 3414 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3415 if (!shost) { 3416 pr_err("%s could not find host no %u\n", 3417 __func__, ev->u.login_flashnode.host_no); 3418 err = -ENODEV; 3419 goto put_host; 3420 } 3421 3422 idx = ev->u.login_flashnode.flashnode_idx; 3423 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3424 if (!fnode_sess) { 3425 pr_err("%s could not find flashnode %u for host no %u\n", 3426 __func__, idx, ev->u.login_flashnode.host_no); 3427 err = -ENODEV; 3428 goto put_host; 3429 } 3430 3431 dev = iscsi_find_flashnode_conn(fnode_sess); 3432 if (!dev) { 3433 err = -ENODEV; 3434 goto put_sess; 3435 } 3436 3437 fnode_conn = iscsi_dev_to_flash_conn(dev); 3438 err = transport->login_flashnode(fnode_sess, fnode_conn); 3439 put_device(dev); 3440 3441 put_sess: 3442 put_device(&fnode_sess->dev); 3443 3444 put_host: 3445 scsi_host_put(shost); 3446 3447 exit_login_fnode: 3448 return err; 3449 } 3450 3451 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3452 struct iscsi_uevent *ev) 3453 { 3454 struct Scsi_Host *shost; 3455 struct iscsi_bus_flash_session *fnode_sess; 3456 struct iscsi_bus_flash_conn *fnode_conn; 3457 struct device *dev; 3458 uint32_t idx; 3459 int err = 0; 3460 3461 if (!transport->logout_flashnode) { 3462 err = -ENOSYS; 3463 goto exit_logout_fnode; 3464 } 3465 3466 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3467 if (!shost) { 3468 pr_err("%s could not find host no %u\n", 3469 __func__, ev->u.logout_flashnode.host_no); 3470 err = -ENODEV; 3471 goto put_host; 3472 } 3473 3474 idx = ev->u.logout_flashnode.flashnode_idx; 3475 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3476 if (!fnode_sess) { 3477 pr_err("%s could not find flashnode %u for host no %u\n", 3478 __func__, idx, ev->u.logout_flashnode.host_no); 3479 err = -ENODEV; 3480 goto put_host; 3481 } 3482 3483 dev = iscsi_find_flashnode_conn(fnode_sess); 3484 if (!dev) { 3485 err = -ENODEV; 3486 goto put_sess; 3487 } 3488 3489 fnode_conn = iscsi_dev_to_flash_conn(dev); 3490 3491 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3492 put_device(dev); 3493 3494 put_sess: 3495 put_device(&fnode_sess->dev); 3496 3497 put_host: 3498 scsi_host_put(shost); 3499 3500 exit_logout_fnode: 3501 return err; 3502 } 3503 3504 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3505 struct iscsi_uevent *ev) 3506 { 3507 struct Scsi_Host *shost; 3508 struct iscsi_cls_session *session; 3509 int err = 0; 3510 3511 if (!transport->logout_flashnode_sid) { 3512 err = -ENOSYS; 3513 goto exit_logout_sid; 3514 } 3515 3516 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3517 if (!shost) { 3518 pr_err("%s could not find host no %u\n", 3519 __func__, ev->u.logout_flashnode.host_no); 3520 err = -ENODEV; 3521 goto put_host; 3522 } 3523 3524 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3525 if (!session) { 3526 pr_err("%s could not find session id %u\n", 3527 __func__, ev->u.logout_flashnode_sid.sid); 3528 err = -EINVAL; 3529 goto put_host; 3530 } 3531 3532 err = transport->logout_flashnode_sid(session); 3533 3534 put_host: 3535 scsi_host_put(shost); 3536 3537 exit_logout_sid: 3538 return err; 3539 } 3540 3541 static int 3542 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3543 { 3544 struct iscsi_uevent *ev = nlmsg_data(nlh); 3545 struct Scsi_Host *shost = NULL; 3546 struct iscsi_internal *priv; 3547 struct sk_buff *skbhost_stats; 3548 struct nlmsghdr *nlhhost_stats; 3549 struct iscsi_uevent *evhost_stats; 3550 int host_stats_size = 0; 3551 int len, err = 0; 3552 char *buf; 3553 3554 if (!transport->get_host_stats) 3555 return -ENOSYS; 3556 3557 priv = iscsi_if_transport_lookup(transport); 3558 if (!priv) 3559 return -EINVAL; 3560 3561 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3562 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3563 3564 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3565 if (!shost) { 3566 pr_err("%s: failed. Could not find host no %u\n", 3567 __func__, ev->u.get_host_stats.host_no); 3568 return -ENODEV; 3569 } 3570 3571 do { 3572 int actual_size; 3573 3574 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3575 if (!skbhost_stats) { 3576 pr_err("cannot deliver host stats: OOM\n"); 3577 err = -ENOMEM; 3578 goto exit_host_stats; 3579 } 3580 3581 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3582 (len - sizeof(*nlhhost_stats)), 0); 3583 evhost_stats = nlmsg_data(nlhhost_stats); 3584 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3585 evhost_stats->transport_handle = iscsi_handle(transport); 3586 evhost_stats->type = nlh->nlmsg_type; 3587 evhost_stats->u.get_host_stats.host_no = 3588 ev->u.get_host_stats.host_no; 3589 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3590 memset(buf, 0, host_stats_size); 3591 3592 err = transport->get_host_stats(shost, buf, host_stats_size); 3593 if (err) { 3594 kfree_skb(skbhost_stats); 3595 goto exit_host_stats; 3596 } 3597 3598 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3599 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3600 nlhhost_stats->nlmsg_len = actual_size; 3601 3602 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3603 GFP_KERNEL); 3604 } while (err < 0 && err != -ECONNREFUSED); 3605 3606 exit_host_stats: 3607 scsi_host_put(shost); 3608 return err; 3609 } 3610 3611 3612 static int 3613 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3614 { 3615 int err = 0; 3616 u32 portid; 3617 struct iscsi_uevent *ev = nlmsg_data(nlh); 3618 struct iscsi_transport *transport = NULL; 3619 struct iscsi_internal *priv; 3620 struct iscsi_cls_session *session; 3621 struct iscsi_cls_conn *conn; 3622 struct iscsi_endpoint *ep = NULL; 3623 3624 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3625 *group = ISCSI_NL_GRP_UIP; 3626 else 3627 *group = ISCSI_NL_GRP_ISCSID; 3628 3629 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3630 if (!priv) 3631 return -EINVAL; 3632 transport = priv->iscsi_transport; 3633 3634 if (!try_module_get(transport->owner)) 3635 return -EINVAL; 3636 3637 portid = NETLINK_CB(skb).portid; 3638 3639 switch (nlh->nlmsg_type) { 3640 case ISCSI_UEVENT_CREATE_SESSION: 3641 err = iscsi_if_create_session(priv, ep, ev, 3642 portid, 3643 ev->u.c_session.initial_cmdsn, 3644 ev->u.c_session.cmds_max, 3645 ev->u.c_session.queue_depth); 3646 break; 3647 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3648 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3649 if (!ep) { 3650 err = -EINVAL; 3651 break; 3652 } 3653 3654 err = iscsi_if_create_session(priv, ep, ev, 3655 portid, 3656 ev->u.c_bound_session.initial_cmdsn, 3657 ev->u.c_bound_session.cmds_max, 3658 ev->u.c_bound_session.queue_depth); 3659 break; 3660 case ISCSI_UEVENT_DESTROY_SESSION: 3661 session = iscsi_session_lookup(ev->u.d_session.sid); 3662 if (!session) 3663 err = -EINVAL; 3664 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3665 err = -EBUSY; 3666 else 3667 transport->destroy_session(session); 3668 break; 3669 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3670 session = iscsi_session_lookup(ev->u.d_session.sid); 3671 if (!session) 3672 err = -EINVAL; 3673 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3674 err = -EBUSY; 3675 else { 3676 unsigned long flags; 3677 3678 /* Prevent this session from being found again */ 3679 spin_lock_irqsave(&sesslock, flags); 3680 list_del_init(&session->sess_list); 3681 spin_unlock_irqrestore(&sesslock, flags); 3682 3683 queue_work(iscsi_destroy_workq, &session->destroy_work); 3684 } 3685 break; 3686 case ISCSI_UEVENT_UNBIND_SESSION: 3687 session = iscsi_session_lookup(ev->u.d_session.sid); 3688 if (session) 3689 scsi_queue_work(iscsi_session_to_shost(session), 3690 &session->unbind_work); 3691 else 3692 err = -EINVAL; 3693 break; 3694 case ISCSI_UEVENT_CREATE_CONN: 3695 err = iscsi_if_create_conn(transport, ev); 3696 break; 3697 case ISCSI_UEVENT_DESTROY_CONN: 3698 err = iscsi_if_destroy_conn(transport, ev); 3699 break; 3700 case ISCSI_UEVENT_BIND_CONN: 3701 session = iscsi_session_lookup(ev->u.b_conn.sid); 3702 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3703 3704 if (conn && conn->ep) 3705 iscsi_if_ep_disconnect(transport, conn->ep->id); 3706 3707 if (!session || !conn) { 3708 err = -EINVAL; 3709 break; 3710 } 3711 3712 mutex_lock(&conn_mutex); 3713 ev->r.retcode = transport->bind_conn(session, conn, 3714 ev->u.b_conn.transport_eph, 3715 ev->u.b_conn.is_leading); 3716 mutex_unlock(&conn_mutex); 3717 3718 if (ev->r.retcode || !transport->ep_connect) 3719 break; 3720 3721 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3722 if (ep) { 3723 ep->conn = conn; 3724 3725 mutex_lock(&conn->ep_mutex); 3726 conn->ep = ep; 3727 mutex_unlock(&conn->ep_mutex); 3728 } else 3729 iscsi_cls_conn_printk(KERN_ERR, conn, 3730 "Could not set ep conn " 3731 "binding\n"); 3732 break; 3733 case ISCSI_UEVENT_SET_PARAM: 3734 err = iscsi_set_param(transport, ev); 3735 break; 3736 case ISCSI_UEVENT_START_CONN: 3737 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3738 if (conn) { 3739 mutex_lock(&conn_mutex); 3740 ev->r.retcode = transport->start_conn(conn); 3741 if (!ev->r.retcode) 3742 conn->state = ISCSI_CONN_UP; 3743 mutex_unlock(&conn_mutex); 3744 } 3745 else 3746 err = -EINVAL; 3747 break; 3748 case ISCSI_UEVENT_STOP_CONN: 3749 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3750 if (conn) 3751 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3752 else 3753 err = -EINVAL; 3754 break; 3755 case ISCSI_UEVENT_SEND_PDU: 3756 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3757 if (conn) { 3758 mutex_lock(&conn_mutex); 3759 ev->r.retcode = transport->send_pdu(conn, 3760 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3761 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3762 ev->u.send_pdu.data_size); 3763 mutex_unlock(&conn_mutex); 3764 } 3765 else 3766 err = -EINVAL; 3767 break; 3768 case ISCSI_UEVENT_GET_STATS: 3769 err = iscsi_if_get_stats(transport, nlh); 3770 break; 3771 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3772 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3773 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3774 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3775 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3776 break; 3777 case ISCSI_UEVENT_TGT_DSCVR: 3778 err = iscsi_tgt_dscvr(transport, ev); 3779 break; 3780 case ISCSI_UEVENT_SET_HOST_PARAM: 3781 err = iscsi_set_host_param(transport, ev); 3782 break; 3783 case ISCSI_UEVENT_PATH_UPDATE: 3784 err = iscsi_set_path(transport, ev); 3785 break; 3786 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3787 err = iscsi_set_iface_params(transport, ev, 3788 nlmsg_attrlen(nlh, sizeof(*ev))); 3789 break; 3790 case ISCSI_UEVENT_PING: 3791 err = iscsi_send_ping(transport, ev); 3792 break; 3793 case ISCSI_UEVENT_GET_CHAP: 3794 err = iscsi_get_chap(transport, nlh); 3795 break; 3796 case ISCSI_UEVENT_DELETE_CHAP: 3797 err = iscsi_delete_chap(transport, ev); 3798 break; 3799 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3800 err = iscsi_set_flashnode_param(transport, ev, 3801 nlmsg_attrlen(nlh, 3802 sizeof(*ev))); 3803 break; 3804 case ISCSI_UEVENT_NEW_FLASHNODE: 3805 err = iscsi_new_flashnode(transport, ev, 3806 nlmsg_attrlen(nlh, sizeof(*ev))); 3807 break; 3808 case ISCSI_UEVENT_DEL_FLASHNODE: 3809 err = iscsi_del_flashnode(transport, ev); 3810 break; 3811 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3812 err = iscsi_login_flashnode(transport, ev); 3813 break; 3814 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3815 err = iscsi_logout_flashnode(transport, ev); 3816 break; 3817 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3818 err = iscsi_logout_flashnode_sid(transport, ev); 3819 break; 3820 case ISCSI_UEVENT_SET_CHAP: 3821 err = iscsi_set_chap(transport, ev, 3822 nlmsg_attrlen(nlh, sizeof(*ev))); 3823 break; 3824 case ISCSI_UEVENT_GET_HOST_STATS: 3825 err = iscsi_get_host_stats(transport, nlh); 3826 break; 3827 default: 3828 err = -ENOSYS; 3829 break; 3830 } 3831 3832 module_put(transport->owner); 3833 return err; 3834 } 3835 3836 /* 3837 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3838 * Malformed skbs with wrong lengths or invalid creds are not processed. 3839 */ 3840 static void 3841 iscsi_if_rx(struct sk_buff *skb) 3842 { 3843 u32 portid = NETLINK_CB(skb).portid; 3844 3845 mutex_lock(&rx_queue_mutex); 3846 while (skb->len >= NLMSG_HDRLEN) { 3847 int err; 3848 uint32_t rlen; 3849 struct nlmsghdr *nlh; 3850 struct iscsi_uevent *ev; 3851 uint32_t group; 3852 int retries = ISCSI_SEND_MAX_ALLOWED; 3853 3854 nlh = nlmsg_hdr(skb); 3855 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3856 skb->len < nlh->nlmsg_len) { 3857 break; 3858 } 3859 3860 ev = nlmsg_data(nlh); 3861 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3862 if (rlen > skb->len) 3863 rlen = skb->len; 3864 3865 err = iscsi_if_recv_msg(skb, nlh, &group); 3866 if (err) { 3867 ev->type = ISCSI_KEVENT_IF_ERROR; 3868 ev->iferror = err; 3869 } 3870 do { 3871 /* 3872 * special case for GET_STATS: 3873 * on success - sending reply and stats from 3874 * inside of if_recv_msg(), 3875 * on error - fall through. 3876 */ 3877 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3878 break; 3879 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3880 break; 3881 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3882 ev, sizeof(*ev)); 3883 if (err == -EAGAIN && --retries < 0) { 3884 printk(KERN_WARNING "Send reply failed, error %d\n", err); 3885 break; 3886 } 3887 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3888 skb_pull(skb, rlen); 3889 } 3890 mutex_unlock(&rx_queue_mutex); 3891 } 3892 3893 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3894 struct device_attribute dev_attr_##_prefix##_##_name = \ 3895 __ATTR(_name,_mode,_show,_store) 3896 3897 /* 3898 * iSCSI connection attrs 3899 */ 3900 #define iscsi_conn_attr_show(param) \ 3901 static ssize_t \ 3902 show_conn_param_##param(struct device *dev, \ 3903 struct device_attribute *attr, char *buf) \ 3904 { \ 3905 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3906 struct iscsi_transport *t = conn->transport; \ 3907 return t->get_conn_param(conn, param, buf); \ 3908 } 3909 3910 #define iscsi_conn_attr(field, param) \ 3911 iscsi_conn_attr_show(param) \ 3912 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3913 NULL); 3914 3915 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3916 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3917 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3918 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3919 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3920 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3921 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3922 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3923 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3924 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3925 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3926 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3927 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3928 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3929 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3930 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3931 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3932 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3933 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3934 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3935 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3936 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3937 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3938 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3939 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3940 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3941 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3942 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3943 3944 static const char *const connection_state_names[] = { 3945 [ISCSI_CONN_UP] = "up", 3946 [ISCSI_CONN_DOWN] = "down", 3947 [ISCSI_CONN_FAILED] = "failed" 3948 }; 3949 3950 static ssize_t show_conn_state(struct device *dev, 3951 struct device_attribute *attr, char *buf) 3952 { 3953 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 3954 const char *state = "unknown"; 3955 3956 if (conn->state >= 0 && 3957 conn->state < ARRAY_SIZE(connection_state_names)) 3958 state = connection_state_names[conn->state]; 3959 3960 return sprintf(buf, "%s\n", state); 3961 } 3962 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 3963 NULL); 3964 3965 #define iscsi_conn_ep_attr_show(param) \ 3966 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 3967 struct device_attribute *attr,\ 3968 char *buf) \ 3969 { \ 3970 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3971 struct iscsi_transport *t = conn->transport; \ 3972 struct iscsi_endpoint *ep; \ 3973 ssize_t rc; \ 3974 \ 3975 /* \ 3976 * Need to make sure ep_disconnect does not free the LLD's \ 3977 * interconnect resources while we are trying to read them. \ 3978 */ \ 3979 mutex_lock(&conn->ep_mutex); \ 3980 ep = conn->ep; \ 3981 if (!ep && t->ep_connect) { \ 3982 mutex_unlock(&conn->ep_mutex); \ 3983 return -ENOTCONN; \ 3984 } \ 3985 \ 3986 if (ep) \ 3987 rc = t->get_ep_param(ep, param, buf); \ 3988 else \ 3989 rc = t->get_conn_param(conn, param, buf); \ 3990 mutex_unlock(&conn->ep_mutex); \ 3991 return rc; \ 3992 } 3993 3994 #define iscsi_conn_ep_attr(field, param) \ 3995 iscsi_conn_ep_attr_show(param) \ 3996 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 3997 show_conn_ep_param_##param, NULL); 3998 3999 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4000 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4001 4002 static struct attribute *iscsi_conn_attrs[] = { 4003 &dev_attr_conn_max_recv_dlength.attr, 4004 &dev_attr_conn_max_xmit_dlength.attr, 4005 &dev_attr_conn_header_digest.attr, 4006 &dev_attr_conn_data_digest.attr, 4007 &dev_attr_conn_ifmarker.attr, 4008 &dev_attr_conn_ofmarker.attr, 4009 &dev_attr_conn_address.attr, 4010 &dev_attr_conn_port.attr, 4011 &dev_attr_conn_exp_statsn.attr, 4012 &dev_attr_conn_persistent_address.attr, 4013 &dev_attr_conn_persistent_port.attr, 4014 &dev_attr_conn_ping_tmo.attr, 4015 &dev_attr_conn_recv_tmo.attr, 4016 &dev_attr_conn_local_port.attr, 4017 &dev_attr_conn_statsn.attr, 4018 &dev_attr_conn_keepalive_tmo.attr, 4019 &dev_attr_conn_max_segment_size.attr, 4020 &dev_attr_conn_tcp_timestamp_stat.attr, 4021 &dev_attr_conn_tcp_wsf_disable.attr, 4022 &dev_attr_conn_tcp_nagle_disable.attr, 4023 &dev_attr_conn_tcp_timer_scale.attr, 4024 &dev_attr_conn_tcp_timestamp_enable.attr, 4025 &dev_attr_conn_fragment_disable.attr, 4026 &dev_attr_conn_ipv4_tos.attr, 4027 &dev_attr_conn_ipv6_traffic_class.attr, 4028 &dev_attr_conn_ipv6_flow_label.attr, 4029 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4030 &dev_attr_conn_tcp_xmit_wsf.attr, 4031 &dev_attr_conn_tcp_recv_wsf.attr, 4032 &dev_attr_conn_local_ipaddr.attr, 4033 &dev_attr_conn_state.attr, 4034 NULL, 4035 }; 4036 4037 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4038 struct attribute *attr, int i) 4039 { 4040 struct device *cdev = container_of(kobj, struct device, kobj); 4041 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4042 struct iscsi_transport *t = conn->transport; 4043 int param; 4044 4045 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4046 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4047 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4048 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4049 else if (attr == &dev_attr_conn_header_digest.attr) 4050 param = ISCSI_PARAM_HDRDGST_EN; 4051 else if (attr == &dev_attr_conn_data_digest.attr) 4052 param = ISCSI_PARAM_DATADGST_EN; 4053 else if (attr == &dev_attr_conn_ifmarker.attr) 4054 param = ISCSI_PARAM_IFMARKER_EN; 4055 else if (attr == &dev_attr_conn_ofmarker.attr) 4056 param = ISCSI_PARAM_OFMARKER_EN; 4057 else if (attr == &dev_attr_conn_address.attr) 4058 param = ISCSI_PARAM_CONN_ADDRESS; 4059 else if (attr == &dev_attr_conn_port.attr) 4060 param = ISCSI_PARAM_CONN_PORT; 4061 else if (attr == &dev_attr_conn_exp_statsn.attr) 4062 param = ISCSI_PARAM_EXP_STATSN; 4063 else if (attr == &dev_attr_conn_persistent_address.attr) 4064 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4065 else if (attr == &dev_attr_conn_persistent_port.attr) 4066 param = ISCSI_PARAM_PERSISTENT_PORT; 4067 else if (attr == &dev_attr_conn_ping_tmo.attr) 4068 param = ISCSI_PARAM_PING_TMO; 4069 else if (attr == &dev_attr_conn_recv_tmo.attr) 4070 param = ISCSI_PARAM_RECV_TMO; 4071 else if (attr == &dev_attr_conn_local_port.attr) 4072 param = ISCSI_PARAM_LOCAL_PORT; 4073 else if (attr == &dev_attr_conn_statsn.attr) 4074 param = ISCSI_PARAM_STATSN; 4075 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4076 param = ISCSI_PARAM_KEEPALIVE_TMO; 4077 else if (attr == &dev_attr_conn_max_segment_size.attr) 4078 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4079 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4080 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4081 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4082 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4083 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4084 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4085 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4086 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4087 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4088 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4089 else if (attr == &dev_attr_conn_fragment_disable.attr) 4090 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4091 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4092 param = ISCSI_PARAM_IPV4_TOS; 4093 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4094 param = ISCSI_PARAM_IPV6_TC; 4095 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4096 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4097 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4098 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4099 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4100 param = ISCSI_PARAM_TCP_XMIT_WSF; 4101 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4102 param = ISCSI_PARAM_TCP_RECV_WSF; 4103 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4104 param = ISCSI_PARAM_LOCAL_IPADDR; 4105 else if (attr == &dev_attr_conn_state.attr) 4106 return S_IRUGO; 4107 else { 4108 WARN_ONCE(1, "Invalid conn attr"); 4109 return 0; 4110 } 4111 4112 return t->attr_is_visible(ISCSI_PARAM, param); 4113 } 4114 4115 static struct attribute_group iscsi_conn_group = { 4116 .attrs = iscsi_conn_attrs, 4117 .is_visible = iscsi_conn_attr_is_visible, 4118 }; 4119 4120 /* 4121 * iSCSI session attrs 4122 */ 4123 #define iscsi_session_attr_show(param, perm) \ 4124 static ssize_t \ 4125 show_session_param_##param(struct device *dev, \ 4126 struct device_attribute *attr, char *buf) \ 4127 { \ 4128 struct iscsi_cls_session *session = \ 4129 iscsi_dev_to_session(dev->parent); \ 4130 struct iscsi_transport *t = session->transport; \ 4131 \ 4132 if (perm && !capable(CAP_SYS_ADMIN)) \ 4133 return -EACCES; \ 4134 return t->get_session_param(session, param, buf); \ 4135 } 4136 4137 #define iscsi_session_attr(field, param, perm) \ 4138 iscsi_session_attr_show(param, perm) \ 4139 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4140 NULL); 4141 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4142 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4143 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4144 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4145 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4146 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4147 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4148 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4149 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4150 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4151 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4152 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4153 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4154 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4155 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4156 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4157 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4158 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4159 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4160 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4161 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4162 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4163 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4164 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4165 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4166 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4167 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4168 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4169 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4170 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4171 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4172 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4173 iscsi_session_attr(discovery_auth_optional, 4174 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4175 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4176 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4177 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4178 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4179 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4180 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4181 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4182 4183 static ssize_t 4184 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4185 char *buf) 4186 { 4187 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4188 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); 4189 } 4190 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4191 NULL); 4192 static ssize_t 4193 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4194 char *buf) 4195 { 4196 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4197 return sprintf(buf, "%d\n", session->creator); 4198 } 4199 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4200 NULL); 4201 static ssize_t 4202 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4203 char *buf) 4204 { 4205 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4206 return sprintf(buf, "%d\n", session->target_id); 4207 } 4208 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4209 show_priv_session_target_id, NULL); 4210 4211 #define iscsi_priv_session_attr_show(field, format) \ 4212 static ssize_t \ 4213 show_priv_session_##field(struct device *dev, \ 4214 struct device_attribute *attr, char *buf) \ 4215 { \ 4216 struct iscsi_cls_session *session = \ 4217 iscsi_dev_to_session(dev->parent); \ 4218 if (session->field == -1) \ 4219 return sprintf(buf, "off\n"); \ 4220 return sprintf(buf, format"\n", session->field); \ 4221 } 4222 4223 #define iscsi_priv_session_attr_store(field) \ 4224 static ssize_t \ 4225 store_priv_session_##field(struct device *dev, \ 4226 struct device_attribute *attr, \ 4227 const char *buf, size_t count) \ 4228 { \ 4229 int val; \ 4230 char *cp; \ 4231 struct iscsi_cls_session *session = \ 4232 iscsi_dev_to_session(dev->parent); \ 4233 if ((session->state == ISCSI_SESSION_FREE) || \ 4234 (session->state == ISCSI_SESSION_FAILED)) \ 4235 return -EBUSY; \ 4236 if (strncmp(buf, "off", 3) == 0) { \ 4237 session->field = -1; \ 4238 session->field##_sysfs_override = true; \ 4239 } else { \ 4240 val = simple_strtoul(buf, &cp, 0); \ 4241 if (*cp != '\0' && *cp != '\n') \ 4242 return -EINVAL; \ 4243 session->field = val; \ 4244 session->field##_sysfs_override = true; \ 4245 } \ 4246 return count; \ 4247 } 4248 4249 #define iscsi_priv_session_rw_attr(field, format) \ 4250 iscsi_priv_session_attr_show(field, format) \ 4251 iscsi_priv_session_attr_store(field) \ 4252 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4253 show_priv_session_##field, \ 4254 store_priv_session_##field) 4255 4256 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4257 4258 static struct attribute *iscsi_session_attrs[] = { 4259 &dev_attr_sess_initial_r2t.attr, 4260 &dev_attr_sess_max_outstanding_r2t.attr, 4261 &dev_attr_sess_immediate_data.attr, 4262 &dev_attr_sess_first_burst_len.attr, 4263 &dev_attr_sess_max_burst_len.attr, 4264 &dev_attr_sess_data_pdu_in_order.attr, 4265 &dev_attr_sess_data_seq_in_order.attr, 4266 &dev_attr_sess_erl.attr, 4267 &dev_attr_sess_targetname.attr, 4268 &dev_attr_sess_tpgt.attr, 4269 &dev_attr_sess_password.attr, 4270 &dev_attr_sess_password_in.attr, 4271 &dev_attr_sess_username.attr, 4272 &dev_attr_sess_username_in.attr, 4273 &dev_attr_sess_fast_abort.attr, 4274 &dev_attr_sess_abort_tmo.attr, 4275 &dev_attr_sess_lu_reset_tmo.attr, 4276 &dev_attr_sess_tgt_reset_tmo.attr, 4277 &dev_attr_sess_ifacename.attr, 4278 &dev_attr_sess_initiatorname.attr, 4279 &dev_attr_sess_targetalias.attr, 4280 &dev_attr_sess_boot_root.attr, 4281 &dev_attr_sess_boot_nic.attr, 4282 &dev_attr_sess_boot_target.attr, 4283 &dev_attr_priv_sess_recovery_tmo.attr, 4284 &dev_attr_priv_sess_state.attr, 4285 &dev_attr_priv_sess_creator.attr, 4286 &dev_attr_sess_chap_out_idx.attr, 4287 &dev_attr_sess_chap_in_idx.attr, 4288 &dev_attr_priv_sess_target_id.attr, 4289 &dev_attr_sess_auto_snd_tgt_disable.attr, 4290 &dev_attr_sess_discovery_session.attr, 4291 &dev_attr_sess_portal_type.attr, 4292 &dev_attr_sess_chap_auth.attr, 4293 &dev_attr_sess_discovery_logout.attr, 4294 &dev_attr_sess_bidi_chap.attr, 4295 &dev_attr_sess_discovery_auth_optional.attr, 4296 &dev_attr_sess_def_time2wait.attr, 4297 &dev_attr_sess_def_time2retain.attr, 4298 &dev_attr_sess_isid.attr, 4299 &dev_attr_sess_tsid.attr, 4300 &dev_attr_sess_def_taskmgmt_tmo.attr, 4301 &dev_attr_sess_discovery_parent_idx.attr, 4302 &dev_attr_sess_discovery_parent_type.attr, 4303 NULL, 4304 }; 4305 4306 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4307 struct attribute *attr, int i) 4308 { 4309 struct device *cdev = container_of(kobj, struct device, kobj); 4310 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4311 struct iscsi_transport *t = session->transport; 4312 int param; 4313 4314 if (attr == &dev_attr_sess_initial_r2t.attr) 4315 param = ISCSI_PARAM_INITIAL_R2T_EN; 4316 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4317 param = ISCSI_PARAM_MAX_R2T; 4318 else if (attr == &dev_attr_sess_immediate_data.attr) 4319 param = ISCSI_PARAM_IMM_DATA_EN; 4320 else if (attr == &dev_attr_sess_first_burst_len.attr) 4321 param = ISCSI_PARAM_FIRST_BURST; 4322 else if (attr == &dev_attr_sess_max_burst_len.attr) 4323 param = ISCSI_PARAM_MAX_BURST; 4324 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4325 param = ISCSI_PARAM_PDU_INORDER_EN; 4326 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4327 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4328 else if (attr == &dev_attr_sess_erl.attr) 4329 param = ISCSI_PARAM_ERL; 4330 else if (attr == &dev_attr_sess_targetname.attr) 4331 param = ISCSI_PARAM_TARGET_NAME; 4332 else if (attr == &dev_attr_sess_tpgt.attr) 4333 param = ISCSI_PARAM_TPGT; 4334 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4335 param = ISCSI_PARAM_CHAP_IN_IDX; 4336 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4337 param = ISCSI_PARAM_CHAP_OUT_IDX; 4338 else if (attr == &dev_attr_sess_password.attr) 4339 param = ISCSI_PARAM_USERNAME; 4340 else if (attr == &dev_attr_sess_password_in.attr) 4341 param = ISCSI_PARAM_USERNAME_IN; 4342 else if (attr == &dev_attr_sess_username.attr) 4343 param = ISCSI_PARAM_PASSWORD; 4344 else if (attr == &dev_attr_sess_username_in.attr) 4345 param = ISCSI_PARAM_PASSWORD_IN; 4346 else if (attr == &dev_attr_sess_fast_abort.attr) 4347 param = ISCSI_PARAM_FAST_ABORT; 4348 else if (attr == &dev_attr_sess_abort_tmo.attr) 4349 param = ISCSI_PARAM_ABORT_TMO; 4350 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4351 param = ISCSI_PARAM_LU_RESET_TMO; 4352 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4353 param = ISCSI_PARAM_TGT_RESET_TMO; 4354 else if (attr == &dev_attr_sess_ifacename.attr) 4355 param = ISCSI_PARAM_IFACE_NAME; 4356 else if (attr == &dev_attr_sess_initiatorname.attr) 4357 param = ISCSI_PARAM_INITIATOR_NAME; 4358 else if (attr == &dev_attr_sess_targetalias.attr) 4359 param = ISCSI_PARAM_TARGET_ALIAS; 4360 else if (attr == &dev_attr_sess_boot_root.attr) 4361 param = ISCSI_PARAM_BOOT_ROOT; 4362 else if (attr == &dev_attr_sess_boot_nic.attr) 4363 param = ISCSI_PARAM_BOOT_NIC; 4364 else if (attr == &dev_attr_sess_boot_target.attr) 4365 param = ISCSI_PARAM_BOOT_TARGET; 4366 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4367 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4368 else if (attr == &dev_attr_sess_discovery_session.attr) 4369 param = ISCSI_PARAM_DISCOVERY_SESS; 4370 else if (attr == &dev_attr_sess_portal_type.attr) 4371 param = ISCSI_PARAM_PORTAL_TYPE; 4372 else if (attr == &dev_attr_sess_chap_auth.attr) 4373 param = ISCSI_PARAM_CHAP_AUTH_EN; 4374 else if (attr == &dev_attr_sess_discovery_logout.attr) 4375 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4376 else if (attr == &dev_attr_sess_bidi_chap.attr) 4377 param = ISCSI_PARAM_BIDI_CHAP_EN; 4378 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4379 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4380 else if (attr == &dev_attr_sess_def_time2wait.attr) 4381 param = ISCSI_PARAM_DEF_TIME2WAIT; 4382 else if (attr == &dev_attr_sess_def_time2retain.attr) 4383 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4384 else if (attr == &dev_attr_sess_isid.attr) 4385 param = ISCSI_PARAM_ISID; 4386 else if (attr == &dev_attr_sess_tsid.attr) 4387 param = ISCSI_PARAM_TSID; 4388 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4389 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4390 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4391 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4392 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4393 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4394 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4395 return S_IRUGO | S_IWUSR; 4396 else if (attr == &dev_attr_priv_sess_state.attr) 4397 return S_IRUGO; 4398 else if (attr == &dev_attr_priv_sess_creator.attr) 4399 return S_IRUGO; 4400 else if (attr == &dev_attr_priv_sess_target_id.attr) 4401 return S_IRUGO; 4402 else { 4403 WARN_ONCE(1, "Invalid session attr"); 4404 return 0; 4405 } 4406 4407 return t->attr_is_visible(ISCSI_PARAM, param); 4408 } 4409 4410 static struct attribute_group iscsi_session_group = { 4411 .attrs = iscsi_session_attrs, 4412 .is_visible = iscsi_session_attr_is_visible, 4413 }; 4414 4415 /* 4416 * iSCSI host attrs 4417 */ 4418 #define iscsi_host_attr_show(param) \ 4419 static ssize_t \ 4420 show_host_param_##param(struct device *dev, \ 4421 struct device_attribute *attr, char *buf) \ 4422 { \ 4423 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4424 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4425 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4426 } 4427 4428 #define iscsi_host_attr(field, param) \ 4429 iscsi_host_attr_show(param) \ 4430 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4431 NULL); 4432 4433 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4434 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4435 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4436 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4437 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4438 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4439 4440 static struct attribute *iscsi_host_attrs[] = { 4441 &dev_attr_host_netdev.attr, 4442 &dev_attr_host_hwaddress.attr, 4443 &dev_attr_host_ipaddress.attr, 4444 &dev_attr_host_initiatorname.attr, 4445 &dev_attr_host_port_state.attr, 4446 &dev_attr_host_port_speed.attr, 4447 NULL, 4448 }; 4449 4450 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4451 struct attribute *attr, int i) 4452 { 4453 struct device *cdev = container_of(kobj, struct device, kobj); 4454 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4455 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4456 int param; 4457 4458 if (attr == &dev_attr_host_netdev.attr) 4459 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4460 else if (attr == &dev_attr_host_hwaddress.attr) 4461 param = ISCSI_HOST_PARAM_HWADDRESS; 4462 else if (attr == &dev_attr_host_ipaddress.attr) 4463 param = ISCSI_HOST_PARAM_IPADDRESS; 4464 else if (attr == &dev_attr_host_initiatorname.attr) 4465 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4466 else if (attr == &dev_attr_host_port_state.attr) 4467 param = ISCSI_HOST_PARAM_PORT_STATE; 4468 else if (attr == &dev_attr_host_port_speed.attr) 4469 param = ISCSI_HOST_PARAM_PORT_SPEED; 4470 else { 4471 WARN_ONCE(1, "Invalid host attr"); 4472 return 0; 4473 } 4474 4475 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4476 } 4477 4478 static struct attribute_group iscsi_host_group = { 4479 .attrs = iscsi_host_attrs, 4480 .is_visible = iscsi_host_attr_is_visible, 4481 }; 4482 4483 /* convert iscsi_port_speed values to ascii string name */ 4484 static const struct { 4485 enum iscsi_port_speed value; 4486 char *name; 4487 } iscsi_port_speed_names[] = { 4488 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4489 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4490 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4491 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4492 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4493 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4494 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4495 }; 4496 4497 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4498 { 4499 int i; 4500 char *speed = "Unknown!"; 4501 struct iscsi_cls_host *ihost = shost->shost_data; 4502 uint32_t port_speed = ihost->port_speed; 4503 4504 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4505 if (iscsi_port_speed_names[i].value & port_speed) { 4506 speed = iscsi_port_speed_names[i].name; 4507 break; 4508 } 4509 } 4510 return speed; 4511 } 4512 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4513 4514 /* convert iscsi_port_state values to ascii string name */ 4515 static const struct { 4516 enum iscsi_port_state value; 4517 char *name; 4518 } iscsi_port_state_names[] = { 4519 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4520 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4521 }; 4522 4523 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4524 { 4525 int i; 4526 char *state = "Unknown!"; 4527 struct iscsi_cls_host *ihost = shost->shost_data; 4528 uint32_t port_state = ihost->port_state; 4529 4530 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4531 if (iscsi_port_state_names[i].value & port_state) { 4532 state = iscsi_port_state_names[i].name; 4533 break; 4534 } 4535 } 4536 return state; 4537 } 4538 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4539 4540 static int iscsi_session_match(struct attribute_container *cont, 4541 struct device *dev) 4542 { 4543 struct iscsi_cls_session *session; 4544 struct Scsi_Host *shost; 4545 struct iscsi_internal *priv; 4546 4547 if (!iscsi_is_session_dev(dev)) 4548 return 0; 4549 4550 session = iscsi_dev_to_session(dev); 4551 shost = iscsi_session_to_shost(session); 4552 if (!shost->transportt) 4553 return 0; 4554 4555 priv = to_iscsi_internal(shost->transportt); 4556 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4557 return 0; 4558 4559 return &priv->session_cont.ac == cont; 4560 } 4561 4562 static int iscsi_conn_match(struct attribute_container *cont, 4563 struct device *dev) 4564 { 4565 struct iscsi_cls_session *session; 4566 struct iscsi_cls_conn *conn; 4567 struct Scsi_Host *shost; 4568 struct iscsi_internal *priv; 4569 4570 if (!iscsi_is_conn_dev(dev)) 4571 return 0; 4572 4573 conn = iscsi_dev_to_conn(dev); 4574 session = iscsi_dev_to_session(conn->dev.parent); 4575 shost = iscsi_session_to_shost(session); 4576 4577 if (!shost->transportt) 4578 return 0; 4579 4580 priv = to_iscsi_internal(shost->transportt); 4581 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4582 return 0; 4583 4584 return &priv->conn_cont.ac == cont; 4585 } 4586 4587 static int iscsi_host_match(struct attribute_container *cont, 4588 struct device *dev) 4589 { 4590 struct Scsi_Host *shost; 4591 struct iscsi_internal *priv; 4592 4593 if (!scsi_is_host_device(dev)) 4594 return 0; 4595 4596 shost = dev_to_shost(dev); 4597 if (!shost->transportt || 4598 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4599 return 0; 4600 4601 priv = to_iscsi_internal(shost->transportt); 4602 return &priv->t.host_attrs.ac == cont; 4603 } 4604 4605 struct scsi_transport_template * 4606 iscsi_register_transport(struct iscsi_transport *tt) 4607 { 4608 struct iscsi_internal *priv; 4609 unsigned long flags; 4610 int err; 4611 4612 BUG_ON(!tt); 4613 4614 priv = iscsi_if_transport_lookup(tt); 4615 if (priv) 4616 return NULL; 4617 4618 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4619 if (!priv) 4620 return NULL; 4621 INIT_LIST_HEAD(&priv->list); 4622 priv->iscsi_transport = tt; 4623 priv->t.user_scan = iscsi_user_scan; 4624 priv->t.create_work_queue = 1; 4625 4626 priv->dev.class = &iscsi_transport_class; 4627 dev_set_name(&priv->dev, "%s", tt->name); 4628 err = device_register(&priv->dev); 4629 if (err) 4630 goto free_priv; 4631 4632 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4633 if (err) 4634 goto unregister_dev; 4635 4636 /* host parameters */ 4637 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4638 priv->t.host_attrs.ac.match = iscsi_host_match; 4639 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4640 priv->t.host_size = sizeof(struct iscsi_cls_host); 4641 transport_container_register(&priv->t.host_attrs); 4642 4643 /* connection parameters */ 4644 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4645 priv->conn_cont.ac.match = iscsi_conn_match; 4646 priv->conn_cont.ac.grp = &iscsi_conn_group; 4647 transport_container_register(&priv->conn_cont); 4648 4649 /* session parameters */ 4650 priv->session_cont.ac.class = &iscsi_session_class.class; 4651 priv->session_cont.ac.match = iscsi_session_match; 4652 priv->session_cont.ac.grp = &iscsi_session_group; 4653 transport_container_register(&priv->session_cont); 4654 4655 spin_lock_irqsave(&iscsi_transport_lock, flags); 4656 list_add(&priv->list, &iscsi_transports); 4657 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4658 4659 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4660 return &priv->t; 4661 4662 unregister_dev: 4663 device_unregister(&priv->dev); 4664 return NULL; 4665 free_priv: 4666 kfree(priv); 4667 return NULL; 4668 } 4669 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4670 4671 int iscsi_unregister_transport(struct iscsi_transport *tt) 4672 { 4673 struct iscsi_internal *priv; 4674 unsigned long flags; 4675 4676 BUG_ON(!tt); 4677 4678 mutex_lock(&rx_queue_mutex); 4679 4680 priv = iscsi_if_transport_lookup(tt); 4681 BUG_ON (!priv); 4682 4683 spin_lock_irqsave(&iscsi_transport_lock, flags); 4684 list_del(&priv->list); 4685 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4686 4687 transport_container_unregister(&priv->conn_cont); 4688 transport_container_unregister(&priv->session_cont); 4689 transport_container_unregister(&priv->t.host_attrs); 4690 4691 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4692 device_unregister(&priv->dev); 4693 mutex_unlock(&rx_queue_mutex); 4694 4695 return 0; 4696 } 4697 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4698 4699 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4700 struct device *dev, const char *fmt, ...) 4701 { 4702 struct va_format vaf; 4703 va_list args; 4704 4705 va_start(args, fmt); 4706 vaf.fmt = fmt; 4707 vaf.va = &args; 4708 trace(dev, &vaf); 4709 va_end(args); 4710 } 4711 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4712 4713 static __init int iscsi_transport_init(void) 4714 { 4715 int err; 4716 struct netlink_kernel_cfg cfg = { 4717 .groups = 1, 4718 .input = iscsi_if_rx, 4719 }; 4720 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4721 ISCSI_TRANSPORT_VERSION); 4722 4723 atomic_set(&iscsi_session_nr, 0); 4724 4725 err = class_register(&iscsi_transport_class); 4726 if (err) 4727 return err; 4728 4729 err = class_register(&iscsi_endpoint_class); 4730 if (err) 4731 goto unregister_transport_class; 4732 4733 err = class_register(&iscsi_iface_class); 4734 if (err) 4735 goto unregister_endpoint_class; 4736 4737 err = transport_class_register(&iscsi_host_class); 4738 if (err) 4739 goto unregister_iface_class; 4740 4741 err = transport_class_register(&iscsi_connection_class); 4742 if (err) 4743 goto unregister_host_class; 4744 4745 err = transport_class_register(&iscsi_session_class); 4746 if (err) 4747 goto unregister_conn_class; 4748 4749 err = bus_register(&iscsi_flashnode_bus); 4750 if (err) 4751 goto unregister_session_class; 4752 4753 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4754 if (!nls) { 4755 err = -ENOBUFS; 4756 goto unregister_flashnode_bus; 4757 } 4758 4759 iscsi_eh_timer_workq = alloc_workqueue("%s", 4760 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4761 1, "iscsi_eh"); 4762 if (!iscsi_eh_timer_workq) { 4763 err = -ENOMEM; 4764 goto release_nls; 4765 } 4766 4767 iscsi_destroy_workq = alloc_workqueue("%s", 4768 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4769 1, "iscsi_destroy"); 4770 if (!iscsi_destroy_workq) { 4771 err = -ENOMEM; 4772 goto destroy_wq; 4773 } 4774 4775 return 0; 4776 4777 destroy_wq: 4778 destroy_workqueue(iscsi_eh_timer_workq); 4779 release_nls: 4780 netlink_kernel_release(nls); 4781 unregister_flashnode_bus: 4782 bus_unregister(&iscsi_flashnode_bus); 4783 unregister_session_class: 4784 transport_class_unregister(&iscsi_session_class); 4785 unregister_conn_class: 4786 transport_class_unregister(&iscsi_connection_class); 4787 unregister_host_class: 4788 transport_class_unregister(&iscsi_host_class); 4789 unregister_iface_class: 4790 class_unregister(&iscsi_iface_class); 4791 unregister_endpoint_class: 4792 class_unregister(&iscsi_endpoint_class); 4793 unregister_transport_class: 4794 class_unregister(&iscsi_transport_class); 4795 return err; 4796 } 4797 4798 static void __exit iscsi_transport_exit(void) 4799 { 4800 destroy_workqueue(iscsi_destroy_workq); 4801 destroy_workqueue(iscsi_eh_timer_workq); 4802 netlink_kernel_release(nls); 4803 bus_unregister(&iscsi_flashnode_bus); 4804 transport_class_unregister(&iscsi_connection_class); 4805 transport_class_unregister(&iscsi_session_class); 4806 transport_class_unregister(&iscsi_host_class); 4807 class_unregister(&iscsi_endpoint_class); 4808 class_unregister(&iscsi_iface_class); 4809 class_unregister(&iscsi_transport_class); 4810 } 4811 4812 module_init(iscsi_transport_init); 4813 module_exit(iscsi_transport_exit); 4814 4815 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4816 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4817 "Alex Aizman <itn780@yahoo.com>"); 4818 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4819 MODULE_LICENSE("GPL"); 4820 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4821 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4822