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 unsigned long flags; 1705 int err; 1706 1707 spin_lock_irqsave(&session->lock, flags); 1708 switch (session->state) { 1709 case ISCSI_SESSION_LOGGED_IN: 1710 err = 0; 1711 break; 1712 case ISCSI_SESSION_FAILED: 1713 err = DID_IMM_RETRY << 16; 1714 break; 1715 case ISCSI_SESSION_FREE: 1716 err = DID_TRANSPORT_FAILFAST << 16; 1717 break; 1718 default: 1719 err = DID_NO_CONNECT << 16; 1720 break; 1721 } 1722 spin_unlock_irqrestore(&session->lock, flags); 1723 return err; 1724 } 1725 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1726 1727 int iscsi_is_session_online(struct iscsi_cls_session *session) 1728 { 1729 unsigned long flags; 1730 int ret = 0; 1731 1732 spin_lock_irqsave(&session->lock, flags); 1733 if (session->state == ISCSI_SESSION_LOGGED_IN) 1734 ret = 1; 1735 spin_unlock_irqrestore(&session->lock, flags); 1736 return ret; 1737 } 1738 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1739 1740 static void iscsi_session_release(struct device *dev) 1741 { 1742 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1743 struct Scsi_Host *shost; 1744 1745 shost = iscsi_session_to_shost(session); 1746 scsi_host_put(shost); 1747 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1748 kfree(session); 1749 } 1750 1751 int iscsi_is_session_dev(const struct device *dev) 1752 { 1753 return dev->release == iscsi_session_release; 1754 } 1755 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1756 1757 static int iscsi_iter_session_fn(struct device *dev, void *data) 1758 { 1759 void (* fn) (struct iscsi_cls_session *) = data; 1760 1761 if (!iscsi_is_session_dev(dev)) 1762 return 0; 1763 fn(iscsi_dev_to_session(dev)); 1764 return 0; 1765 } 1766 1767 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1768 void (*fn)(struct iscsi_cls_session *)) 1769 { 1770 device_for_each_child(&shost->shost_gendev, fn, 1771 iscsi_iter_session_fn); 1772 } 1773 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1774 1775 /** 1776 * iscsi_scan_finished - helper to report when running scans are done 1777 * @shost: scsi host 1778 * @time: scan run time 1779 * 1780 * This function can be used by drives like qla4xxx to report to the scsi 1781 * layer when the scans it kicked off at module load time are done. 1782 */ 1783 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) 1784 { 1785 struct iscsi_cls_host *ihost = shost->shost_data; 1786 /* 1787 * qla4xxx will have kicked off some session unblocks before calling 1788 * scsi_scan_host, so just wait for them to complete. 1789 */ 1790 return !atomic_read(&ihost->nr_scans); 1791 } 1792 EXPORT_SYMBOL_GPL(iscsi_scan_finished); 1793 1794 struct iscsi_scan_data { 1795 unsigned int channel; 1796 unsigned int id; 1797 u64 lun; 1798 enum scsi_scan_mode rescan; 1799 }; 1800 1801 static int iscsi_user_scan_session(struct device *dev, void *data) 1802 { 1803 struct iscsi_scan_data *scan_data = data; 1804 struct iscsi_cls_session *session; 1805 struct Scsi_Host *shost; 1806 struct iscsi_cls_host *ihost; 1807 unsigned long flags; 1808 unsigned int id; 1809 1810 if (!iscsi_is_session_dev(dev)) 1811 return 0; 1812 1813 session = iscsi_dev_to_session(dev); 1814 1815 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1816 1817 shost = iscsi_session_to_shost(session); 1818 ihost = shost->shost_data; 1819 1820 mutex_lock(&ihost->mutex); 1821 spin_lock_irqsave(&session->lock, flags); 1822 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1823 spin_unlock_irqrestore(&session->lock, flags); 1824 goto user_scan_exit; 1825 } 1826 id = session->target_id; 1827 spin_unlock_irqrestore(&session->lock, flags); 1828 1829 if (id != ISCSI_MAX_TARGET) { 1830 if ((scan_data->channel == SCAN_WILD_CARD || 1831 scan_data->channel == 0) && 1832 (scan_data->id == SCAN_WILD_CARD || 1833 scan_data->id == id)) 1834 scsi_scan_target(&session->dev, 0, id, 1835 scan_data->lun, scan_data->rescan); 1836 } 1837 1838 user_scan_exit: 1839 mutex_unlock(&ihost->mutex); 1840 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1841 return 0; 1842 } 1843 1844 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1845 uint id, u64 lun) 1846 { 1847 struct iscsi_scan_data scan_data; 1848 1849 scan_data.channel = channel; 1850 scan_data.id = id; 1851 scan_data.lun = lun; 1852 scan_data.rescan = SCSI_SCAN_MANUAL; 1853 1854 return device_for_each_child(&shost->shost_gendev, &scan_data, 1855 iscsi_user_scan_session); 1856 } 1857 1858 static void iscsi_scan_session(struct work_struct *work) 1859 { 1860 struct iscsi_cls_session *session = 1861 container_of(work, struct iscsi_cls_session, scan_work); 1862 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1863 struct iscsi_cls_host *ihost = shost->shost_data; 1864 struct iscsi_scan_data scan_data; 1865 1866 scan_data.channel = 0; 1867 scan_data.id = SCAN_WILD_CARD; 1868 scan_data.lun = SCAN_WILD_CARD; 1869 scan_data.rescan = SCSI_SCAN_RESCAN; 1870 1871 iscsi_user_scan_session(&session->dev, &scan_data); 1872 atomic_dec(&ihost->nr_scans); 1873 } 1874 1875 /** 1876 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1877 * @cmd: scsi cmd passed to scsi eh handler 1878 * 1879 * If the session is down this function will wait for the recovery 1880 * timer to fire or for the session to be logged back in. If the 1881 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1882 * should pass this error value to the scsi eh. 1883 */ 1884 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1885 { 1886 struct iscsi_cls_session *session = 1887 starget_to_session(scsi_target(cmd->device)); 1888 unsigned long flags; 1889 int ret = 0; 1890 1891 spin_lock_irqsave(&session->lock, flags); 1892 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1893 if (session->state == ISCSI_SESSION_FREE) { 1894 ret = FAST_IO_FAIL; 1895 break; 1896 } 1897 spin_unlock_irqrestore(&session->lock, flags); 1898 msleep(1000); 1899 spin_lock_irqsave(&session->lock, flags); 1900 } 1901 spin_unlock_irqrestore(&session->lock, flags); 1902 return ret; 1903 } 1904 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1905 1906 static void session_recovery_timedout(struct work_struct *work) 1907 { 1908 struct iscsi_cls_session *session = 1909 container_of(work, struct iscsi_cls_session, 1910 recovery_work.work); 1911 unsigned long flags; 1912 1913 iscsi_cls_session_printk(KERN_INFO, session, 1914 "session recovery timed out after %d secs\n", 1915 session->recovery_tmo); 1916 1917 spin_lock_irqsave(&session->lock, flags); 1918 switch (session->state) { 1919 case ISCSI_SESSION_FAILED: 1920 session->state = ISCSI_SESSION_FREE; 1921 break; 1922 case ISCSI_SESSION_LOGGED_IN: 1923 case ISCSI_SESSION_FREE: 1924 /* we raced with the unblock's flush */ 1925 spin_unlock_irqrestore(&session->lock, flags); 1926 return; 1927 } 1928 spin_unlock_irqrestore(&session->lock, flags); 1929 1930 if (session->transport->session_recovery_timedout) 1931 session->transport->session_recovery_timedout(session); 1932 1933 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1934 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1935 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1936 } 1937 1938 static void __iscsi_unblock_session(struct work_struct *work) 1939 { 1940 struct iscsi_cls_session *session = 1941 container_of(work, struct iscsi_cls_session, 1942 unblock_work); 1943 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1944 struct iscsi_cls_host *ihost = shost->shost_data; 1945 unsigned long flags; 1946 1947 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1948 /* 1949 * The recovery and unblock work get run from the same workqueue, 1950 * so try to cancel it if it was going to run after this unblock. 1951 */ 1952 cancel_delayed_work(&session->recovery_work); 1953 spin_lock_irqsave(&session->lock, flags); 1954 session->state = ISCSI_SESSION_LOGGED_IN; 1955 spin_unlock_irqrestore(&session->lock, flags); 1956 /* start IO */ 1957 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1958 /* 1959 * Only do kernel scanning if the driver is properly hooked into 1960 * the async scanning code (drivers like iscsi_tcp do login and 1961 * scanning from userspace). 1962 */ 1963 if (shost->hostt->scan_finished) { 1964 if (scsi_queue_work(shost, &session->scan_work)) 1965 atomic_inc(&ihost->nr_scans); 1966 } 1967 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1968 } 1969 1970 /** 1971 * iscsi_unblock_session - set a session as logged in and start IO. 1972 * @session: iscsi session 1973 * 1974 * Mark a session as ready to accept IO. 1975 */ 1976 void iscsi_unblock_session(struct iscsi_cls_session *session) 1977 { 1978 queue_work(iscsi_eh_timer_workq, &session->unblock_work); 1979 /* 1980 * Blocking the session can be done from any context so we only 1981 * queue the block work. Make sure the unblock work has completed 1982 * because it flushes/cancels the other works and updates the state. 1983 */ 1984 flush_work(&session->unblock_work); 1985 } 1986 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1987 1988 static void __iscsi_block_session(struct work_struct *work) 1989 { 1990 struct iscsi_cls_session *session = 1991 container_of(work, struct iscsi_cls_session, 1992 block_work); 1993 unsigned long flags; 1994 1995 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1996 spin_lock_irqsave(&session->lock, flags); 1997 session->state = ISCSI_SESSION_FAILED; 1998 spin_unlock_irqrestore(&session->lock, flags); 1999 scsi_target_block(&session->dev); 2000 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 2001 if (session->recovery_tmo >= 0) 2002 queue_delayed_work(iscsi_eh_timer_workq, 2003 &session->recovery_work, 2004 session->recovery_tmo * HZ); 2005 } 2006 2007 void iscsi_block_session(struct iscsi_cls_session *session) 2008 { 2009 queue_work(iscsi_eh_timer_workq, &session->block_work); 2010 } 2011 EXPORT_SYMBOL_GPL(iscsi_block_session); 2012 2013 static void __iscsi_unbind_session(struct work_struct *work) 2014 { 2015 struct iscsi_cls_session *session = 2016 container_of(work, struct iscsi_cls_session, 2017 unbind_work); 2018 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2019 struct iscsi_cls_host *ihost = shost->shost_data; 2020 unsigned long flags; 2021 unsigned int target_id; 2022 2023 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 2024 2025 /* Prevent new scans and make sure scanning is not in progress */ 2026 mutex_lock(&ihost->mutex); 2027 spin_lock_irqsave(&session->lock, flags); 2028 if (session->target_id == ISCSI_MAX_TARGET) { 2029 spin_unlock_irqrestore(&session->lock, flags); 2030 mutex_unlock(&ihost->mutex); 2031 goto unbind_session_exit; 2032 } 2033 2034 target_id = session->target_id; 2035 session->target_id = ISCSI_MAX_TARGET; 2036 spin_unlock_irqrestore(&session->lock, flags); 2037 mutex_unlock(&ihost->mutex); 2038 2039 scsi_remove_target(&session->dev); 2040 2041 if (session->ida_used) 2042 ida_simple_remove(&iscsi_sess_ida, target_id); 2043 2044 unbind_session_exit: 2045 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2046 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2047 } 2048 2049 static void __iscsi_destroy_session(struct work_struct *work) 2050 { 2051 struct iscsi_cls_session *session = 2052 container_of(work, struct iscsi_cls_session, destroy_work); 2053 2054 session->transport->destroy_session(session); 2055 } 2056 2057 struct iscsi_cls_session * 2058 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2059 int dd_size) 2060 { 2061 struct iscsi_cls_session *session; 2062 2063 session = kzalloc(sizeof(*session) + dd_size, 2064 GFP_KERNEL); 2065 if (!session) 2066 return NULL; 2067 2068 session->transport = transport; 2069 session->creator = -1; 2070 session->recovery_tmo = 120; 2071 session->recovery_tmo_sysfs_override = false; 2072 session->state = ISCSI_SESSION_FREE; 2073 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2074 INIT_LIST_HEAD(&session->sess_list); 2075 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2076 INIT_WORK(&session->block_work, __iscsi_block_session); 2077 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2078 INIT_WORK(&session->scan_work, iscsi_scan_session); 2079 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2080 spin_lock_init(&session->lock); 2081 2082 /* this is released in the dev's release function */ 2083 scsi_host_get(shost); 2084 session->dev.parent = &shost->shost_gendev; 2085 session->dev.release = iscsi_session_release; 2086 device_initialize(&session->dev); 2087 if (dd_size) 2088 session->dd_data = &session[1]; 2089 2090 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2091 return session; 2092 } 2093 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2094 2095 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2096 { 2097 unsigned long flags; 2098 int id = 0; 2099 int err; 2100 2101 session->sid = atomic_add_return(1, &iscsi_session_nr); 2102 2103 if (target_id == ISCSI_MAX_TARGET) { 2104 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); 2105 2106 if (id < 0) { 2107 iscsi_cls_session_printk(KERN_ERR, session, 2108 "Failure in Target ID Allocation\n"); 2109 return id; 2110 } 2111 session->target_id = (unsigned int)id; 2112 session->ida_used = true; 2113 } else 2114 session->target_id = target_id; 2115 2116 dev_set_name(&session->dev, "session%u", session->sid); 2117 err = device_add(&session->dev); 2118 if (err) { 2119 iscsi_cls_session_printk(KERN_ERR, session, 2120 "could not register session's dev\n"); 2121 goto release_ida; 2122 } 2123 err = transport_register_device(&session->dev); 2124 if (err) { 2125 iscsi_cls_session_printk(KERN_ERR, session, 2126 "could not register transport's dev\n"); 2127 goto release_dev; 2128 } 2129 2130 spin_lock_irqsave(&sesslock, flags); 2131 list_add(&session->sess_list, &sesslist); 2132 spin_unlock_irqrestore(&sesslock, flags); 2133 2134 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2135 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2136 return 0; 2137 2138 release_dev: 2139 device_del(&session->dev); 2140 release_ida: 2141 if (session->ida_used) 2142 ida_simple_remove(&iscsi_sess_ida, session->target_id); 2143 2144 return err; 2145 } 2146 EXPORT_SYMBOL_GPL(iscsi_add_session); 2147 2148 /** 2149 * iscsi_create_session - create iscsi class session 2150 * @shost: scsi host 2151 * @transport: iscsi transport 2152 * @dd_size: private driver data size 2153 * @target_id: which target 2154 * 2155 * This can be called from a LLD or iscsi_transport. 2156 */ 2157 struct iscsi_cls_session * 2158 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2159 int dd_size, unsigned int target_id) 2160 { 2161 struct iscsi_cls_session *session; 2162 2163 session = iscsi_alloc_session(shost, transport, dd_size); 2164 if (!session) 2165 return NULL; 2166 2167 if (iscsi_add_session(session, target_id)) { 2168 iscsi_free_session(session); 2169 return NULL; 2170 } 2171 return session; 2172 } 2173 EXPORT_SYMBOL_GPL(iscsi_create_session); 2174 2175 static void iscsi_conn_release(struct device *dev) 2176 { 2177 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2178 struct device *parent = conn->dev.parent; 2179 2180 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2181 kfree(conn); 2182 put_device(parent); 2183 } 2184 2185 static int iscsi_is_conn_dev(const struct device *dev) 2186 { 2187 return dev->release == iscsi_conn_release; 2188 } 2189 2190 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2191 { 2192 if (!iscsi_is_conn_dev(dev)) 2193 return 0; 2194 return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); 2195 } 2196 2197 void iscsi_remove_session(struct iscsi_cls_session *session) 2198 { 2199 unsigned long flags; 2200 int err; 2201 2202 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2203 2204 spin_lock_irqsave(&sesslock, flags); 2205 if (!list_empty(&session->sess_list)) 2206 list_del(&session->sess_list); 2207 spin_unlock_irqrestore(&sesslock, flags); 2208 2209 flush_work(&session->block_work); 2210 flush_work(&session->unblock_work); 2211 cancel_delayed_work_sync(&session->recovery_work); 2212 /* 2213 * If we are blocked let commands flow again. The lld or iscsi 2214 * layer should set up the queuecommand to fail commands. 2215 * We assume that LLD will not be calling block/unblock while 2216 * removing the session. 2217 */ 2218 spin_lock_irqsave(&session->lock, flags); 2219 session->state = ISCSI_SESSION_FREE; 2220 spin_unlock_irqrestore(&session->lock, flags); 2221 2222 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2223 /* flush running scans then delete devices */ 2224 flush_work(&session->scan_work); 2225 /* flush running unbind operations */ 2226 flush_work(&session->unbind_work); 2227 __iscsi_unbind_session(&session->unbind_work); 2228 2229 /* hw iscsi may not have removed all connections from session */ 2230 err = device_for_each_child(&session->dev, NULL, 2231 iscsi_iter_destroy_conn_fn); 2232 if (err) 2233 iscsi_cls_session_printk(KERN_ERR, session, 2234 "Could not delete all connections " 2235 "for session. Error %d.\n", err); 2236 2237 transport_unregister_device(&session->dev); 2238 2239 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2240 device_del(&session->dev); 2241 } 2242 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2243 2244 void iscsi_free_session(struct iscsi_cls_session *session) 2245 { 2246 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2247 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2248 put_device(&session->dev); 2249 } 2250 EXPORT_SYMBOL_GPL(iscsi_free_session); 2251 2252 /** 2253 * iscsi_create_conn - create iscsi class connection 2254 * @session: iscsi cls session 2255 * @dd_size: private driver data size 2256 * @cid: connection id 2257 * 2258 * This can be called from a LLD or iscsi_transport. The connection 2259 * is child of the session so cid must be unique for all connections 2260 * on the session. 2261 * 2262 * Since we do not support MCS, cid will normally be zero. In some cases 2263 * for software iscsi we could be trying to preallocate a connection struct 2264 * in which case there could be two connection structs and cid would be 2265 * non-zero. 2266 */ 2267 struct iscsi_cls_conn * 2268 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2269 { 2270 struct iscsi_transport *transport = session->transport; 2271 struct iscsi_cls_conn *conn; 2272 unsigned long flags; 2273 int err; 2274 2275 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2276 if (!conn) 2277 return NULL; 2278 if (dd_size) 2279 conn->dd_data = &conn[1]; 2280 2281 mutex_init(&conn->ep_mutex); 2282 INIT_LIST_HEAD(&conn->conn_list); 2283 INIT_LIST_HEAD(&conn->conn_list_err); 2284 conn->transport = transport; 2285 conn->cid = cid; 2286 conn->state = ISCSI_CONN_DOWN; 2287 2288 /* this is released in the dev's release function */ 2289 if (!get_device(&session->dev)) 2290 goto free_conn; 2291 2292 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2293 conn->dev.parent = &session->dev; 2294 conn->dev.release = iscsi_conn_release; 2295 err = device_register(&conn->dev); 2296 if (err) { 2297 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2298 "register connection's dev\n"); 2299 goto release_parent_ref; 2300 } 2301 err = transport_register_device(&conn->dev); 2302 if (err) { 2303 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2304 "register transport's dev\n"); 2305 goto release_conn_ref; 2306 } 2307 2308 spin_lock_irqsave(&connlock, flags); 2309 list_add(&conn->conn_list, &connlist); 2310 spin_unlock_irqrestore(&connlock, flags); 2311 2312 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); 2313 return conn; 2314 2315 release_conn_ref: 2316 device_unregister(&conn->dev); 2317 put_device(&session->dev); 2318 return NULL; 2319 release_parent_ref: 2320 put_device(&session->dev); 2321 free_conn: 2322 kfree(conn); 2323 return NULL; 2324 } 2325 2326 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2327 2328 /** 2329 * iscsi_destroy_conn - destroy iscsi class connection 2330 * @conn: iscsi cls session 2331 * 2332 * This can be called from a LLD or iscsi_transport. 2333 */ 2334 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2335 { 2336 unsigned long flags; 2337 2338 spin_lock_irqsave(&connlock, flags); 2339 list_del(&conn->conn_list); 2340 list_del(&conn->conn_list_err); 2341 spin_unlock_irqrestore(&connlock, flags); 2342 2343 transport_unregister_device(&conn->dev); 2344 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2345 device_unregister(&conn->dev); 2346 return 0; 2347 } 2348 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2349 2350 /* 2351 * iscsi interface functions 2352 */ 2353 static struct iscsi_internal * 2354 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2355 { 2356 struct iscsi_internal *priv; 2357 unsigned long flags; 2358 2359 spin_lock_irqsave(&iscsi_transport_lock, flags); 2360 list_for_each_entry(priv, &iscsi_transports, list) { 2361 if (tt == priv->iscsi_transport) { 2362 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2363 return priv; 2364 } 2365 } 2366 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2367 return NULL; 2368 } 2369 2370 static int 2371 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2372 { 2373 return nlmsg_multicast(nls, skb, 0, group, gfp); 2374 } 2375 2376 static int 2377 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2378 { 2379 return nlmsg_unicast(nls, skb, portid); 2380 } 2381 2382 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2383 char *data, uint32_t data_size) 2384 { 2385 struct nlmsghdr *nlh; 2386 struct sk_buff *skb; 2387 struct iscsi_uevent *ev; 2388 char *pdu; 2389 struct iscsi_internal *priv; 2390 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2391 data_size); 2392 2393 priv = iscsi_if_transport_lookup(conn->transport); 2394 if (!priv) 2395 return -EINVAL; 2396 2397 skb = alloc_skb(len, GFP_ATOMIC); 2398 if (!skb) { 2399 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2400 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2401 "control PDU: OOM\n"); 2402 return -ENOMEM; 2403 } 2404 2405 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2406 ev = nlmsg_data(nlh); 2407 memset(ev, 0, sizeof(*ev)); 2408 ev->transport_handle = iscsi_handle(conn->transport); 2409 ev->type = ISCSI_KEVENT_RECV_PDU; 2410 ev->r.recv_req.cid = conn->cid; 2411 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2412 pdu = (char*)ev + sizeof(*ev); 2413 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2414 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2415 2416 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2417 } 2418 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2419 2420 int iscsi_offload_mesg(struct Scsi_Host *shost, 2421 struct iscsi_transport *transport, uint32_t type, 2422 char *data, uint16_t data_size) 2423 { 2424 struct nlmsghdr *nlh; 2425 struct sk_buff *skb; 2426 struct iscsi_uevent *ev; 2427 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2428 2429 skb = alloc_skb(len, GFP_ATOMIC); 2430 if (!skb) { 2431 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2432 return -ENOMEM; 2433 } 2434 2435 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2436 ev = nlmsg_data(nlh); 2437 memset(ev, 0, sizeof(*ev)); 2438 ev->type = type; 2439 ev->transport_handle = iscsi_handle(transport); 2440 switch (type) { 2441 case ISCSI_KEVENT_PATH_REQ: 2442 ev->r.req_path.host_no = shost->host_no; 2443 break; 2444 case ISCSI_KEVENT_IF_DOWN: 2445 ev->r.notify_if_down.host_no = shost->host_no; 2446 break; 2447 } 2448 2449 memcpy((char *)ev + sizeof(*ev), data, data_size); 2450 2451 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2452 } 2453 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2454 2455 /* 2456 * This can be called without the rx_queue_mutex, if invoked by the kernel 2457 * stop work. But, in that case, it is guaranteed not to race with 2458 * iscsi_destroy by conn_mutex. 2459 */ 2460 static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2461 { 2462 /* 2463 * It is important that this path doesn't rely on 2464 * rx_queue_mutex, otherwise, a thread doing allocation on a 2465 * start_session/start_connection could sleep waiting on a 2466 * writeback to a failed iscsi device, that cannot be recovered 2467 * because the lock is held. If we don't hold it here, the 2468 * kernel stop_conn_work_fn has a chance to stop the broken 2469 * session and resolve the allocation. 2470 * 2471 * Still, the user invoked .stop_conn() needs to be serialized 2472 * with stop_conn_work_fn by a private mutex. Not pretty, but 2473 * it works. 2474 */ 2475 mutex_lock(&conn_mutex); 2476 conn->transport->stop_conn(conn, flag); 2477 mutex_unlock(&conn_mutex); 2478 2479 } 2480 2481 static void stop_conn_work_fn(struct work_struct *work) 2482 { 2483 struct iscsi_cls_conn *conn, *tmp; 2484 unsigned long flags; 2485 LIST_HEAD(recovery_list); 2486 2487 spin_lock_irqsave(&connlock, flags); 2488 if (list_empty(&connlist_err)) { 2489 spin_unlock_irqrestore(&connlock, flags); 2490 return; 2491 } 2492 list_splice_init(&connlist_err, &recovery_list); 2493 spin_unlock_irqrestore(&connlock, flags); 2494 2495 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) { 2496 uint32_t sid = iscsi_conn_get_sid(conn); 2497 struct iscsi_cls_session *session; 2498 2499 session = iscsi_session_lookup(sid); 2500 if (session) { 2501 if (system_state != SYSTEM_RUNNING) { 2502 session->recovery_tmo = 0; 2503 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2504 } else { 2505 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER); 2506 } 2507 } 2508 2509 list_del_init(&conn->conn_list_err); 2510 } 2511 } 2512 2513 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2514 { 2515 struct nlmsghdr *nlh; 2516 struct sk_buff *skb; 2517 struct iscsi_uevent *ev; 2518 struct iscsi_internal *priv; 2519 int len = nlmsg_total_size(sizeof(*ev)); 2520 unsigned long flags; 2521 2522 spin_lock_irqsave(&connlock, flags); 2523 list_add(&conn->conn_list_err, &connlist_err); 2524 spin_unlock_irqrestore(&connlock, flags); 2525 queue_work(system_unbound_wq, &stop_conn_work); 2526 2527 priv = iscsi_if_transport_lookup(conn->transport); 2528 if (!priv) 2529 return; 2530 2531 skb = alloc_skb(len, GFP_ATOMIC); 2532 if (!skb) { 2533 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2534 "conn error (%d)\n", error); 2535 return; 2536 } 2537 2538 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2539 ev = nlmsg_data(nlh); 2540 ev->transport_handle = iscsi_handle(conn->transport); 2541 ev->type = ISCSI_KEVENT_CONN_ERROR; 2542 ev->r.connerror.error = error; 2543 ev->r.connerror.cid = conn->cid; 2544 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2545 2546 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2547 2548 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2549 error); 2550 } 2551 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2552 2553 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2554 enum iscsi_conn_state state) 2555 { 2556 struct nlmsghdr *nlh; 2557 struct sk_buff *skb; 2558 struct iscsi_uevent *ev; 2559 struct iscsi_internal *priv; 2560 int len = nlmsg_total_size(sizeof(*ev)); 2561 2562 priv = iscsi_if_transport_lookup(conn->transport); 2563 if (!priv) 2564 return; 2565 2566 skb = alloc_skb(len, GFP_ATOMIC); 2567 if (!skb) { 2568 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2569 "conn login (%d)\n", state); 2570 return; 2571 } 2572 2573 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2574 ev = nlmsg_data(nlh); 2575 ev->transport_handle = iscsi_handle(conn->transport); 2576 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2577 ev->r.conn_login.state = state; 2578 ev->r.conn_login.cid = conn->cid; 2579 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2580 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2581 2582 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2583 state); 2584 } 2585 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2586 2587 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2588 enum iscsi_host_event_code code, uint32_t data_size, 2589 uint8_t *data) 2590 { 2591 struct nlmsghdr *nlh; 2592 struct sk_buff *skb; 2593 struct iscsi_uevent *ev; 2594 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2595 2596 skb = alloc_skb(len, GFP_NOIO); 2597 if (!skb) { 2598 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2599 host_no, code); 2600 return; 2601 } 2602 2603 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2604 ev = nlmsg_data(nlh); 2605 ev->transport_handle = iscsi_handle(transport); 2606 ev->type = ISCSI_KEVENT_HOST_EVENT; 2607 ev->r.host_event.host_no = host_no; 2608 ev->r.host_event.code = code; 2609 ev->r.host_event.data_size = data_size; 2610 2611 if (data_size) 2612 memcpy((char *)ev + sizeof(*ev), data, data_size); 2613 2614 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2615 } 2616 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2617 2618 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2619 uint32_t status, uint32_t pid, uint32_t data_size, 2620 uint8_t *data) 2621 { 2622 struct nlmsghdr *nlh; 2623 struct sk_buff *skb; 2624 struct iscsi_uevent *ev; 2625 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2626 2627 skb = alloc_skb(len, GFP_NOIO); 2628 if (!skb) { 2629 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2630 return; 2631 } 2632 2633 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2634 ev = nlmsg_data(nlh); 2635 ev->transport_handle = iscsi_handle(transport); 2636 ev->type = ISCSI_KEVENT_PING_COMP; 2637 ev->r.ping_comp.host_no = host_no; 2638 ev->r.ping_comp.status = status; 2639 ev->r.ping_comp.pid = pid; 2640 ev->r.ping_comp.data_size = data_size; 2641 memcpy((char *)ev + sizeof(*ev), data, data_size); 2642 2643 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2644 } 2645 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2646 2647 static int 2648 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2649 { 2650 struct sk_buff *skb; 2651 struct nlmsghdr *nlh; 2652 int len = nlmsg_total_size(size); 2653 2654 skb = alloc_skb(len, GFP_ATOMIC); 2655 if (!skb) { 2656 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2657 return -ENOMEM; 2658 } 2659 2660 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2661 memcpy(nlmsg_data(nlh), payload, size); 2662 return iscsi_unicast_skb(skb, portid); 2663 } 2664 2665 static int 2666 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2667 { 2668 struct iscsi_uevent *ev = nlmsg_data(nlh); 2669 struct iscsi_stats *stats; 2670 struct sk_buff *skbstat; 2671 struct iscsi_cls_conn *conn; 2672 struct nlmsghdr *nlhstat; 2673 struct iscsi_uevent *evstat; 2674 struct iscsi_internal *priv; 2675 int len = nlmsg_total_size(sizeof(*ev) + 2676 sizeof(struct iscsi_stats) + 2677 sizeof(struct iscsi_stats_custom) * 2678 ISCSI_STATS_CUSTOM_MAX); 2679 int err = 0; 2680 2681 priv = iscsi_if_transport_lookup(transport); 2682 if (!priv) 2683 return -EINVAL; 2684 2685 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2686 if (!conn) 2687 return -EEXIST; 2688 2689 do { 2690 int actual_size; 2691 2692 skbstat = alloc_skb(len, GFP_ATOMIC); 2693 if (!skbstat) { 2694 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2695 "deliver stats: OOM\n"); 2696 return -ENOMEM; 2697 } 2698 2699 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2700 (len - sizeof(*nlhstat)), 0); 2701 evstat = nlmsg_data(nlhstat); 2702 memset(evstat, 0, sizeof(*evstat)); 2703 evstat->transport_handle = iscsi_handle(conn->transport); 2704 evstat->type = nlh->nlmsg_type; 2705 evstat->u.get_stats.cid = 2706 ev->u.get_stats.cid; 2707 evstat->u.get_stats.sid = 2708 ev->u.get_stats.sid; 2709 stats = (struct iscsi_stats *) 2710 ((char*)evstat + sizeof(*evstat)); 2711 memset(stats, 0, sizeof(*stats)); 2712 2713 transport->get_stats(conn, stats); 2714 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2715 sizeof(struct iscsi_stats) + 2716 sizeof(struct iscsi_stats_custom) * 2717 stats->custom_length); 2718 actual_size -= sizeof(*nlhstat); 2719 actual_size = nlmsg_msg_size(actual_size); 2720 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2721 nlhstat->nlmsg_len = actual_size; 2722 2723 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2724 GFP_ATOMIC); 2725 } while (err < 0 && err != -ECONNREFUSED); 2726 2727 return err; 2728 } 2729 2730 /** 2731 * iscsi_session_event - send session destr. completion event 2732 * @session: iscsi class session 2733 * @event: type of event 2734 */ 2735 int iscsi_session_event(struct iscsi_cls_session *session, 2736 enum iscsi_uevent_e event) 2737 { 2738 struct iscsi_internal *priv; 2739 struct Scsi_Host *shost; 2740 struct iscsi_uevent *ev; 2741 struct sk_buff *skb; 2742 struct nlmsghdr *nlh; 2743 int rc, len = nlmsg_total_size(sizeof(*ev)); 2744 2745 priv = iscsi_if_transport_lookup(session->transport); 2746 if (!priv) 2747 return -EINVAL; 2748 shost = iscsi_session_to_shost(session); 2749 2750 skb = alloc_skb(len, GFP_KERNEL); 2751 if (!skb) { 2752 iscsi_cls_session_printk(KERN_ERR, session, 2753 "Cannot notify userspace of session " 2754 "event %u\n", event); 2755 return -ENOMEM; 2756 } 2757 2758 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2759 ev = nlmsg_data(nlh); 2760 ev->transport_handle = iscsi_handle(session->transport); 2761 2762 ev->type = event; 2763 switch (event) { 2764 case ISCSI_KEVENT_DESTROY_SESSION: 2765 ev->r.d_session.host_no = shost->host_no; 2766 ev->r.d_session.sid = session->sid; 2767 break; 2768 case ISCSI_KEVENT_CREATE_SESSION: 2769 ev->r.c_session_ret.host_no = shost->host_no; 2770 ev->r.c_session_ret.sid = session->sid; 2771 break; 2772 case ISCSI_KEVENT_UNBIND_SESSION: 2773 ev->r.unbind_session.host_no = shost->host_no; 2774 ev->r.unbind_session.sid = session->sid; 2775 break; 2776 default: 2777 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2778 "%u.\n", event); 2779 kfree_skb(skb); 2780 return -EINVAL; 2781 } 2782 2783 /* 2784 * this will occur if the daemon is not up, so we just warn 2785 * the user and when the daemon is restarted it will handle it 2786 */ 2787 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2788 if (rc == -ESRCH) 2789 iscsi_cls_session_printk(KERN_ERR, session, 2790 "Cannot notify userspace of session " 2791 "event %u. Check iscsi daemon\n", 2792 event); 2793 2794 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2795 event, rc); 2796 return rc; 2797 } 2798 EXPORT_SYMBOL_GPL(iscsi_session_event); 2799 2800 static int 2801 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2802 struct iscsi_uevent *ev, pid_t pid, 2803 uint32_t initial_cmdsn, uint16_t cmds_max, 2804 uint16_t queue_depth) 2805 { 2806 struct iscsi_transport *transport = priv->iscsi_transport; 2807 struct iscsi_cls_session *session; 2808 struct Scsi_Host *shost; 2809 2810 session = transport->create_session(ep, cmds_max, queue_depth, 2811 initial_cmdsn); 2812 if (!session) 2813 return -ENOMEM; 2814 2815 session->creator = pid; 2816 shost = iscsi_session_to_shost(session); 2817 ev->r.c_session_ret.host_no = shost->host_no; 2818 ev->r.c_session_ret.sid = session->sid; 2819 ISCSI_DBG_TRANS_SESSION(session, 2820 "Completed creating transport session\n"); 2821 return 0; 2822 } 2823 2824 static int 2825 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2826 { 2827 struct iscsi_cls_conn *conn; 2828 struct iscsi_cls_session *session; 2829 2830 session = iscsi_session_lookup(ev->u.c_conn.sid); 2831 if (!session) { 2832 printk(KERN_ERR "iscsi: invalid session %d.\n", 2833 ev->u.c_conn.sid); 2834 return -EINVAL; 2835 } 2836 2837 conn = transport->create_conn(session, ev->u.c_conn.cid); 2838 if (!conn) { 2839 iscsi_cls_session_printk(KERN_ERR, session, 2840 "couldn't create a new connection."); 2841 return -ENOMEM; 2842 } 2843 2844 ev->r.c_conn_ret.sid = session->sid; 2845 ev->r.c_conn_ret.cid = conn->cid; 2846 2847 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2848 return 0; 2849 } 2850 2851 static int 2852 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2853 { 2854 struct iscsi_cls_conn *conn; 2855 unsigned long flags; 2856 2857 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2858 if (!conn) 2859 return -EINVAL; 2860 2861 spin_lock_irqsave(&connlock, flags); 2862 if (!list_empty(&conn->conn_list_err)) { 2863 spin_unlock_irqrestore(&connlock, flags); 2864 return -EAGAIN; 2865 } 2866 spin_unlock_irqrestore(&connlock, flags); 2867 2868 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2869 2870 mutex_lock(&conn_mutex); 2871 if (transport->destroy_conn) 2872 transport->destroy_conn(conn); 2873 mutex_unlock(&conn_mutex); 2874 2875 return 0; 2876 } 2877 2878 static int 2879 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2880 { 2881 char *data = (char*)ev + sizeof(*ev); 2882 struct iscsi_cls_conn *conn; 2883 struct iscsi_cls_session *session; 2884 int err = 0, value = 0; 2885 2886 session = iscsi_session_lookup(ev->u.set_param.sid); 2887 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2888 if (!conn || !session) 2889 return -EINVAL; 2890 2891 switch (ev->u.set_param.param) { 2892 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2893 sscanf(data, "%d", &value); 2894 if (!session->recovery_tmo_sysfs_override) 2895 session->recovery_tmo = value; 2896 break; 2897 default: 2898 err = transport->set_param(conn, ev->u.set_param.param, 2899 data, ev->u.set_param.len); 2900 } 2901 2902 return err; 2903 } 2904 2905 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2906 struct iscsi_uevent *ev, int msg_type) 2907 { 2908 struct iscsi_endpoint *ep; 2909 struct sockaddr *dst_addr; 2910 struct Scsi_Host *shost = NULL; 2911 int non_blocking, err = 0; 2912 2913 if (!transport->ep_connect) 2914 return -EINVAL; 2915 2916 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2917 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2918 if (!shost) { 2919 printk(KERN_ERR "ep connect failed. Could not find " 2920 "host no %u\n", 2921 ev->u.ep_connect_through_host.host_no); 2922 return -ENODEV; 2923 } 2924 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2925 } else 2926 non_blocking = ev->u.ep_connect.non_blocking; 2927 2928 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2929 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2930 if (IS_ERR(ep)) { 2931 err = PTR_ERR(ep); 2932 goto release_host; 2933 } 2934 2935 ev->r.ep_connect_ret.handle = ep->id; 2936 release_host: 2937 if (shost) 2938 scsi_host_put(shost); 2939 return err; 2940 } 2941 2942 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2943 u64 ep_handle) 2944 { 2945 struct iscsi_cls_conn *conn; 2946 struct iscsi_endpoint *ep; 2947 2948 if (!transport->ep_disconnect) 2949 return -EINVAL; 2950 2951 ep = iscsi_lookup_endpoint(ep_handle); 2952 if (!ep) 2953 return -EINVAL; 2954 conn = ep->conn; 2955 if (conn) { 2956 mutex_lock(&conn->ep_mutex); 2957 conn->ep = NULL; 2958 mutex_unlock(&conn->ep_mutex); 2959 } 2960 2961 transport->ep_disconnect(ep); 2962 return 0; 2963 } 2964 2965 static int 2966 iscsi_if_transport_ep(struct iscsi_transport *transport, 2967 struct iscsi_uevent *ev, int msg_type) 2968 { 2969 struct iscsi_endpoint *ep; 2970 int rc = 0; 2971 2972 switch (msg_type) { 2973 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2974 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2975 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2976 break; 2977 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2978 if (!transport->ep_poll) 2979 return -EINVAL; 2980 2981 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2982 if (!ep) 2983 return -EINVAL; 2984 2985 ev->r.retcode = transport->ep_poll(ep, 2986 ev->u.ep_poll.timeout_ms); 2987 break; 2988 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 2989 rc = iscsi_if_ep_disconnect(transport, 2990 ev->u.ep_disconnect.ep_handle); 2991 break; 2992 } 2993 return rc; 2994 } 2995 2996 static int 2997 iscsi_tgt_dscvr(struct iscsi_transport *transport, 2998 struct iscsi_uevent *ev) 2999 { 3000 struct Scsi_Host *shost; 3001 struct sockaddr *dst_addr; 3002 int err; 3003 3004 if (!transport->tgt_dscvr) 3005 return -EINVAL; 3006 3007 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3008 if (!shost) { 3009 printk(KERN_ERR "target discovery could not find host no %u\n", 3010 ev->u.tgt_dscvr.host_no); 3011 return -ENODEV; 3012 } 3013 3014 3015 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3016 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3017 ev->u.tgt_dscvr.enable, dst_addr); 3018 scsi_host_put(shost); 3019 return err; 3020 } 3021 3022 static int 3023 iscsi_set_host_param(struct iscsi_transport *transport, 3024 struct iscsi_uevent *ev) 3025 { 3026 char *data = (char*)ev + sizeof(*ev); 3027 struct Scsi_Host *shost; 3028 int err; 3029 3030 if (!transport->set_host_param) 3031 return -ENOSYS; 3032 3033 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3034 if (!shost) { 3035 printk(KERN_ERR "set_host_param could not find host no %u\n", 3036 ev->u.set_host_param.host_no); 3037 return -ENODEV; 3038 } 3039 3040 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3041 data, ev->u.set_host_param.len); 3042 scsi_host_put(shost); 3043 return err; 3044 } 3045 3046 static int 3047 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3048 { 3049 struct Scsi_Host *shost; 3050 struct iscsi_path *params; 3051 int err; 3052 3053 if (!transport->set_path) 3054 return -ENOSYS; 3055 3056 shost = scsi_host_lookup(ev->u.set_path.host_no); 3057 if (!shost) { 3058 printk(KERN_ERR "set path could not find host no %u\n", 3059 ev->u.set_path.host_no); 3060 return -ENODEV; 3061 } 3062 3063 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3064 err = transport->set_path(shost, params); 3065 3066 scsi_host_put(shost); 3067 return err; 3068 } 3069 3070 static int iscsi_session_has_conns(int sid) 3071 { 3072 struct iscsi_cls_conn *conn; 3073 unsigned long flags; 3074 int found = 0; 3075 3076 spin_lock_irqsave(&connlock, flags); 3077 list_for_each_entry(conn, &connlist, conn_list) { 3078 if (iscsi_conn_get_sid(conn) == sid) { 3079 found = 1; 3080 break; 3081 } 3082 } 3083 spin_unlock_irqrestore(&connlock, flags); 3084 3085 return found; 3086 } 3087 3088 static int 3089 iscsi_set_iface_params(struct iscsi_transport *transport, 3090 struct iscsi_uevent *ev, uint32_t len) 3091 { 3092 char *data = (char *)ev + sizeof(*ev); 3093 struct Scsi_Host *shost; 3094 int err; 3095 3096 if (!transport->set_iface_param) 3097 return -ENOSYS; 3098 3099 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3100 if (!shost) { 3101 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3102 ev->u.set_iface_params.host_no); 3103 return -ENODEV; 3104 } 3105 3106 err = transport->set_iface_param(shost, data, len); 3107 scsi_host_put(shost); 3108 return err; 3109 } 3110 3111 static int 3112 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3113 { 3114 struct Scsi_Host *shost; 3115 struct sockaddr *dst_addr; 3116 int err; 3117 3118 if (!transport->send_ping) 3119 return -ENOSYS; 3120 3121 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3122 if (!shost) { 3123 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3124 ev->u.iscsi_ping.host_no); 3125 return -ENODEV; 3126 } 3127 3128 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3129 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3130 ev->u.iscsi_ping.iface_type, 3131 ev->u.iscsi_ping.payload_size, 3132 ev->u.iscsi_ping.pid, 3133 dst_addr); 3134 scsi_host_put(shost); 3135 return err; 3136 } 3137 3138 static int 3139 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3140 { 3141 struct iscsi_uevent *ev = nlmsg_data(nlh); 3142 struct Scsi_Host *shost = NULL; 3143 struct iscsi_chap_rec *chap_rec; 3144 struct iscsi_internal *priv; 3145 struct sk_buff *skbchap; 3146 struct nlmsghdr *nlhchap; 3147 struct iscsi_uevent *evchap; 3148 uint32_t chap_buf_size; 3149 int len, err = 0; 3150 char *buf; 3151 3152 if (!transport->get_chap) 3153 return -EINVAL; 3154 3155 priv = iscsi_if_transport_lookup(transport); 3156 if (!priv) 3157 return -EINVAL; 3158 3159 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3160 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3161 3162 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3163 if (!shost) { 3164 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3165 __func__, ev->u.get_chap.host_no); 3166 return -ENODEV; 3167 } 3168 3169 do { 3170 int actual_size; 3171 3172 skbchap = alloc_skb(len, GFP_KERNEL); 3173 if (!skbchap) { 3174 printk(KERN_ERR "can not deliver chap: OOM\n"); 3175 err = -ENOMEM; 3176 goto exit_get_chap; 3177 } 3178 3179 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3180 (len - sizeof(*nlhchap)), 0); 3181 evchap = nlmsg_data(nlhchap); 3182 memset(evchap, 0, sizeof(*evchap)); 3183 evchap->transport_handle = iscsi_handle(transport); 3184 evchap->type = nlh->nlmsg_type; 3185 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3186 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3187 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3188 buf = (char *)evchap + sizeof(*evchap); 3189 memset(buf, 0, chap_buf_size); 3190 3191 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3192 &evchap->u.get_chap.num_entries, buf); 3193 3194 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3195 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3196 nlhchap->nlmsg_len = actual_size; 3197 3198 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3199 GFP_KERNEL); 3200 } while (err < 0 && err != -ECONNREFUSED); 3201 3202 exit_get_chap: 3203 scsi_host_put(shost); 3204 return err; 3205 } 3206 3207 static int iscsi_set_chap(struct iscsi_transport *transport, 3208 struct iscsi_uevent *ev, uint32_t len) 3209 { 3210 char *data = (char *)ev + sizeof(*ev); 3211 struct Scsi_Host *shost; 3212 int err = 0; 3213 3214 if (!transport->set_chap) 3215 return -ENOSYS; 3216 3217 shost = scsi_host_lookup(ev->u.set_path.host_no); 3218 if (!shost) { 3219 pr_err("%s could not find host no %u\n", 3220 __func__, ev->u.set_path.host_no); 3221 return -ENODEV; 3222 } 3223 3224 err = transport->set_chap(shost, data, len); 3225 scsi_host_put(shost); 3226 return err; 3227 } 3228 3229 static int iscsi_delete_chap(struct iscsi_transport *transport, 3230 struct iscsi_uevent *ev) 3231 { 3232 struct Scsi_Host *shost; 3233 int err = 0; 3234 3235 if (!transport->delete_chap) 3236 return -ENOSYS; 3237 3238 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3239 if (!shost) { 3240 printk(KERN_ERR "%s could not find host no %u\n", 3241 __func__, ev->u.delete_chap.host_no); 3242 return -ENODEV; 3243 } 3244 3245 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3246 scsi_host_put(shost); 3247 return err; 3248 } 3249 3250 static const struct { 3251 enum iscsi_discovery_parent_type value; 3252 char *name; 3253 } iscsi_discovery_parent_names[] = { 3254 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3255 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3256 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3257 }; 3258 3259 char *iscsi_get_discovery_parent_name(int parent_type) 3260 { 3261 int i; 3262 char *state = "Unknown!"; 3263 3264 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3265 if (iscsi_discovery_parent_names[i].value & parent_type) { 3266 state = iscsi_discovery_parent_names[i].name; 3267 break; 3268 } 3269 } 3270 return state; 3271 } 3272 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3273 3274 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3275 struct iscsi_uevent *ev, uint32_t len) 3276 { 3277 char *data = (char *)ev + sizeof(*ev); 3278 struct Scsi_Host *shost; 3279 struct iscsi_bus_flash_session *fnode_sess; 3280 struct iscsi_bus_flash_conn *fnode_conn; 3281 struct device *dev; 3282 uint32_t idx; 3283 int err = 0; 3284 3285 if (!transport->set_flashnode_param) { 3286 err = -ENOSYS; 3287 goto exit_set_fnode; 3288 } 3289 3290 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3291 if (!shost) { 3292 pr_err("%s could not find host no %u\n", 3293 __func__, ev->u.set_flashnode.host_no); 3294 err = -ENODEV; 3295 goto exit_set_fnode; 3296 } 3297 3298 idx = ev->u.set_flashnode.flashnode_idx; 3299 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3300 if (!fnode_sess) { 3301 pr_err("%s could not find flashnode %u for host no %u\n", 3302 __func__, idx, ev->u.set_flashnode.host_no); 3303 err = -ENODEV; 3304 goto put_host; 3305 } 3306 3307 dev = iscsi_find_flashnode_conn(fnode_sess); 3308 if (!dev) { 3309 err = -ENODEV; 3310 goto put_sess; 3311 } 3312 3313 fnode_conn = iscsi_dev_to_flash_conn(dev); 3314 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3315 put_device(dev); 3316 3317 put_sess: 3318 put_device(&fnode_sess->dev); 3319 3320 put_host: 3321 scsi_host_put(shost); 3322 3323 exit_set_fnode: 3324 return err; 3325 } 3326 3327 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3328 struct iscsi_uevent *ev, uint32_t len) 3329 { 3330 char *data = (char *)ev + sizeof(*ev); 3331 struct Scsi_Host *shost; 3332 int index; 3333 int err = 0; 3334 3335 if (!transport->new_flashnode) { 3336 err = -ENOSYS; 3337 goto exit_new_fnode; 3338 } 3339 3340 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3341 if (!shost) { 3342 pr_err("%s could not find host no %u\n", 3343 __func__, ev->u.new_flashnode.host_no); 3344 err = -ENODEV; 3345 goto put_host; 3346 } 3347 3348 index = transport->new_flashnode(shost, data, len); 3349 3350 if (index >= 0) 3351 ev->r.new_flashnode_ret.flashnode_idx = index; 3352 else 3353 err = -EIO; 3354 3355 put_host: 3356 scsi_host_put(shost); 3357 3358 exit_new_fnode: 3359 return err; 3360 } 3361 3362 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3363 struct iscsi_uevent *ev) 3364 { 3365 struct Scsi_Host *shost; 3366 struct iscsi_bus_flash_session *fnode_sess; 3367 uint32_t idx; 3368 int err = 0; 3369 3370 if (!transport->del_flashnode) { 3371 err = -ENOSYS; 3372 goto exit_del_fnode; 3373 } 3374 3375 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3376 if (!shost) { 3377 pr_err("%s could not find host no %u\n", 3378 __func__, ev->u.del_flashnode.host_no); 3379 err = -ENODEV; 3380 goto put_host; 3381 } 3382 3383 idx = ev->u.del_flashnode.flashnode_idx; 3384 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3385 if (!fnode_sess) { 3386 pr_err("%s could not find flashnode %u for host no %u\n", 3387 __func__, idx, ev->u.del_flashnode.host_no); 3388 err = -ENODEV; 3389 goto put_host; 3390 } 3391 3392 err = transport->del_flashnode(fnode_sess); 3393 put_device(&fnode_sess->dev); 3394 3395 put_host: 3396 scsi_host_put(shost); 3397 3398 exit_del_fnode: 3399 return err; 3400 } 3401 3402 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3403 struct iscsi_uevent *ev) 3404 { 3405 struct Scsi_Host *shost; 3406 struct iscsi_bus_flash_session *fnode_sess; 3407 struct iscsi_bus_flash_conn *fnode_conn; 3408 struct device *dev; 3409 uint32_t idx; 3410 int err = 0; 3411 3412 if (!transport->login_flashnode) { 3413 err = -ENOSYS; 3414 goto exit_login_fnode; 3415 } 3416 3417 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3418 if (!shost) { 3419 pr_err("%s could not find host no %u\n", 3420 __func__, ev->u.login_flashnode.host_no); 3421 err = -ENODEV; 3422 goto put_host; 3423 } 3424 3425 idx = ev->u.login_flashnode.flashnode_idx; 3426 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3427 if (!fnode_sess) { 3428 pr_err("%s could not find flashnode %u for host no %u\n", 3429 __func__, idx, ev->u.login_flashnode.host_no); 3430 err = -ENODEV; 3431 goto put_host; 3432 } 3433 3434 dev = iscsi_find_flashnode_conn(fnode_sess); 3435 if (!dev) { 3436 err = -ENODEV; 3437 goto put_sess; 3438 } 3439 3440 fnode_conn = iscsi_dev_to_flash_conn(dev); 3441 err = transport->login_flashnode(fnode_sess, fnode_conn); 3442 put_device(dev); 3443 3444 put_sess: 3445 put_device(&fnode_sess->dev); 3446 3447 put_host: 3448 scsi_host_put(shost); 3449 3450 exit_login_fnode: 3451 return err; 3452 } 3453 3454 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3455 struct iscsi_uevent *ev) 3456 { 3457 struct Scsi_Host *shost; 3458 struct iscsi_bus_flash_session *fnode_sess; 3459 struct iscsi_bus_flash_conn *fnode_conn; 3460 struct device *dev; 3461 uint32_t idx; 3462 int err = 0; 3463 3464 if (!transport->logout_flashnode) { 3465 err = -ENOSYS; 3466 goto exit_logout_fnode; 3467 } 3468 3469 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3470 if (!shost) { 3471 pr_err("%s could not find host no %u\n", 3472 __func__, ev->u.logout_flashnode.host_no); 3473 err = -ENODEV; 3474 goto put_host; 3475 } 3476 3477 idx = ev->u.logout_flashnode.flashnode_idx; 3478 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3479 if (!fnode_sess) { 3480 pr_err("%s could not find flashnode %u for host no %u\n", 3481 __func__, idx, ev->u.logout_flashnode.host_no); 3482 err = -ENODEV; 3483 goto put_host; 3484 } 3485 3486 dev = iscsi_find_flashnode_conn(fnode_sess); 3487 if (!dev) { 3488 err = -ENODEV; 3489 goto put_sess; 3490 } 3491 3492 fnode_conn = iscsi_dev_to_flash_conn(dev); 3493 3494 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3495 put_device(dev); 3496 3497 put_sess: 3498 put_device(&fnode_sess->dev); 3499 3500 put_host: 3501 scsi_host_put(shost); 3502 3503 exit_logout_fnode: 3504 return err; 3505 } 3506 3507 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3508 struct iscsi_uevent *ev) 3509 { 3510 struct Scsi_Host *shost; 3511 struct iscsi_cls_session *session; 3512 int err = 0; 3513 3514 if (!transport->logout_flashnode_sid) { 3515 err = -ENOSYS; 3516 goto exit_logout_sid; 3517 } 3518 3519 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3520 if (!shost) { 3521 pr_err("%s could not find host no %u\n", 3522 __func__, ev->u.logout_flashnode.host_no); 3523 err = -ENODEV; 3524 goto put_host; 3525 } 3526 3527 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3528 if (!session) { 3529 pr_err("%s could not find session id %u\n", 3530 __func__, ev->u.logout_flashnode_sid.sid); 3531 err = -EINVAL; 3532 goto put_host; 3533 } 3534 3535 err = transport->logout_flashnode_sid(session); 3536 3537 put_host: 3538 scsi_host_put(shost); 3539 3540 exit_logout_sid: 3541 return err; 3542 } 3543 3544 static int 3545 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3546 { 3547 struct iscsi_uevent *ev = nlmsg_data(nlh); 3548 struct Scsi_Host *shost = NULL; 3549 struct iscsi_internal *priv; 3550 struct sk_buff *skbhost_stats; 3551 struct nlmsghdr *nlhhost_stats; 3552 struct iscsi_uevent *evhost_stats; 3553 int host_stats_size = 0; 3554 int len, err = 0; 3555 char *buf; 3556 3557 if (!transport->get_host_stats) 3558 return -ENOSYS; 3559 3560 priv = iscsi_if_transport_lookup(transport); 3561 if (!priv) 3562 return -EINVAL; 3563 3564 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3565 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3566 3567 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3568 if (!shost) { 3569 pr_err("%s: failed. Could not find host no %u\n", 3570 __func__, ev->u.get_host_stats.host_no); 3571 return -ENODEV; 3572 } 3573 3574 do { 3575 int actual_size; 3576 3577 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3578 if (!skbhost_stats) { 3579 pr_err("cannot deliver host stats: OOM\n"); 3580 err = -ENOMEM; 3581 goto exit_host_stats; 3582 } 3583 3584 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3585 (len - sizeof(*nlhhost_stats)), 0); 3586 evhost_stats = nlmsg_data(nlhhost_stats); 3587 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3588 evhost_stats->transport_handle = iscsi_handle(transport); 3589 evhost_stats->type = nlh->nlmsg_type; 3590 evhost_stats->u.get_host_stats.host_no = 3591 ev->u.get_host_stats.host_no; 3592 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3593 memset(buf, 0, host_stats_size); 3594 3595 err = transport->get_host_stats(shost, buf, host_stats_size); 3596 if (err) { 3597 kfree_skb(skbhost_stats); 3598 goto exit_host_stats; 3599 } 3600 3601 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3602 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3603 nlhhost_stats->nlmsg_len = actual_size; 3604 3605 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3606 GFP_KERNEL); 3607 } while (err < 0 && err != -ECONNREFUSED); 3608 3609 exit_host_stats: 3610 scsi_host_put(shost); 3611 return err; 3612 } 3613 3614 3615 static int 3616 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3617 { 3618 int err = 0; 3619 u32 portid; 3620 struct iscsi_uevent *ev = nlmsg_data(nlh); 3621 struct iscsi_transport *transport = NULL; 3622 struct iscsi_internal *priv; 3623 struct iscsi_cls_session *session; 3624 struct iscsi_cls_conn *conn; 3625 struct iscsi_endpoint *ep = NULL; 3626 3627 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3628 *group = ISCSI_NL_GRP_UIP; 3629 else 3630 *group = ISCSI_NL_GRP_ISCSID; 3631 3632 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3633 if (!priv) 3634 return -EINVAL; 3635 transport = priv->iscsi_transport; 3636 3637 if (!try_module_get(transport->owner)) 3638 return -EINVAL; 3639 3640 portid = NETLINK_CB(skb).portid; 3641 3642 switch (nlh->nlmsg_type) { 3643 case ISCSI_UEVENT_CREATE_SESSION: 3644 err = iscsi_if_create_session(priv, ep, ev, 3645 portid, 3646 ev->u.c_session.initial_cmdsn, 3647 ev->u.c_session.cmds_max, 3648 ev->u.c_session.queue_depth); 3649 break; 3650 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3651 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3652 if (!ep) { 3653 err = -EINVAL; 3654 break; 3655 } 3656 3657 err = iscsi_if_create_session(priv, ep, ev, 3658 portid, 3659 ev->u.c_bound_session.initial_cmdsn, 3660 ev->u.c_bound_session.cmds_max, 3661 ev->u.c_bound_session.queue_depth); 3662 break; 3663 case ISCSI_UEVENT_DESTROY_SESSION: 3664 session = iscsi_session_lookup(ev->u.d_session.sid); 3665 if (!session) 3666 err = -EINVAL; 3667 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3668 err = -EBUSY; 3669 else 3670 transport->destroy_session(session); 3671 break; 3672 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3673 session = iscsi_session_lookup(ev->u.d_session.sid); 3674 if (!session) 3675 err = -EINVAL; 3676 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3677 err = -EBUSY; 3678 else { 3679 unsigned long flags; 3680 3681 /* Prevent this session from being found again */ 3682 spin_lock_irqsave(&sesslock, flags); 3683 list_del_init(&session->sess_list); 3684 spin_unlock_irqrestore(&sesslock, flags); 3685 3686 queue_work(iscsi_destroy_workq, &session->destroy_work); 3687 } 3688 break; 3689 case ISCSI_UEVENT_UNBIND_SESSION: 3690 session = iscsi_session_lookup(ev->u.d_session.sid); 3691 if (session) 3692 scsi_queue_work(iscsi_session_to_shost(session), 3693 &session->unbind_work); 3694 else 3695 err = -EINVAL; 3696 break; 3697 case ISCSI_UEVENT_CREATE_CONN: 3698 err = iscsi_if_create_conn(transport, ev); 3699 break; 3700 case ISCSI_UEVENT_DESTROY_CONN: 3701 err = iscsi_if_destroy_conn(transport, ev); 3702 break; 3703 case ISCSI_UEVENT_BIND_CONN: 3704 session = iscsi_session_lookup(ev->u.b_conn.sid); 3705 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3706 3707 if (conn && conn->ep) 3708 iscsi_if_ep_disconnect(transport, conn->ep->id); 3709 3710 if (!session || !conn) { 3711 err = -EINVAL; 3712 break; 3713 } 3714 3715 mutex_lock(&conn_mutex); 3716 ev->r.retcode = transport->bind_conn(session, conn, 3717 ev->u.b_conn.transport_eph, 3718 ev->u.b_conn.is_leading); 3719 mutex_unlock(&conn_mutex); 3720 3721 if (ev->r.retcode || !transport->ep_connect) 3722 break; 3723 3724 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3725 if (ep) { 3726 ep->conn = conn; 3727 3728 mutex_lock(&conn->ep_mutex); 3729 conn->ep = ep; 3730 mutex_unlock(&conn->ep_mutex); 3731 } else 3732 iscsi_cls_conn_printk(KERN_ERR, conn, 3733 "Could not set ep conn " 3734 "binding\n"); 3735 break; 3736 case ISCSI_UEVENT_SET_PARAM: 3737 err = iscsi_set_param(transport, ev); 3738 break; 3739 case ISCSI_UEVENT_START_CONN: 3740 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3741 if (conn) { 3742 mutex_lock(&conn_mutex); 3743 ev->r.retcode = transport->start_conn(conn); 3744 if (!ev->r.retcode) 3745 conn->state = ISCSI_CONN_UP; 3746 mutex_unlock(&conn_mutex); 3747 } 3748 else 3749 err = -EINVAL; 3750 break; 3751 case ISCSI_UEVENT_STOP_CONN: 3752 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3753 if (conn) 3754 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3755 else 3756 err = -EINVAL; 3757 break; 3758 case ISCSI_UEVENT_SEND_PDU: 3759 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3760 if (conn) { 3761 mutex_lock(&conn_mutex); 3762 ev->r.retcode = transport->send_pdu(conn, 3763 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3764 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3765 ev->u.send_pdu.data_size); 3766 mutex_unlock(&conn_mutex); 3767 } 3768 else 3769 err = -EINVAL; 3770 break; 3771 case ISCSI_UEVENT_GET_STATS: 3772 err = iscsi_if_get_stats(transport, nlh); 3773 break; 3774 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3775 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3776 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3777 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3778 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3779 break; 3780 case ISCSI_UEVENT_TGT_DSCVR: 3781 err = iscsi_tgt_dscvr(transport, ev); 3782 break; 3783 case ISCSI_UEVENT_SET_HOST_PARAM: 3784 err = iscsi_set_host_param(transport, ev); 3785 break; 3786 case ISCSI_UEVENT_PATH_UPDATE: 3787 err = iscsi_set_path(transport, ev); 3788 break; 3789 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3790 err = iscsi_set_iface_params(transport, ev, 3791 nlmsg_attrlen(nlh, sizeof(*ev))); 3792 break; 3793 case ISCSI_UEVENT_PING: 3794 err = iscsi_send_ping(transport, ev); 3795 break; 3796 case ISCSI_UEVENT_GET_CHAP: 3797 err = iscsi_get_chap(transport, nlh); 3798 break; 3799 case ISCSI_UEVENT_DELETE_CHAP: 3800 err = iscsi_delete_chap(transport, ev); 3801 break; 3802 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3803 err = iscsi_set_flashnode_param(transport, ev, 3804 nlmsg_attrlen(nlh, 3805 sizeof(*ev))); 3806 break; 3807 case ISCSI_UEVENT_NEW_FLASHNODE: 3808 err = iscsi_new_flashnode(transport, ev, 3809 nlmsg_attrlen(nlh, sizeof(*ev))); 3810 break; 3811 case ISCSI_UEVENT_DEL_FLASHNODE: 3812 err = iscsi_del_flashnode(transport, ev); 3813 break; 3814 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3815 err = iscsi_login_flashnode(transport, ev); 3816 break; 3817 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3818 err = iscsi_logout_flashnode(transport, ev); 3819 break; 3820 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3821 err = iscsi_logout_flashnode_sid(transport, ev); 3822 break; 3823 case ISCSI_UEVENT_SET_CHAP: 3824 err = iscsi_set_chap(transport, ev, 3825 nlmsg_attrlen(nlh, sizeof(*ev))); 3826 break; 3827 case ISCSI_UEVENT_GET_HOST_STATS: 3828 err = iscsi_get_host_stats(transport, nlh); 3829 break; 3830 default: 3831 err = -ENOSYS; 3832 break; 3833 } 3834 3835 module_put(transport->owner); 3836 return err; 3837 } 3838 3839 /* 3840 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3841 * Malformed skbs with wrong lengths or invalid creds are not processed. 3842 */ 3843 static void 3844 iscsi_if_rx(struct sk_buff *skb) 3845 { 3846 u32 portid = NETLINK_CB(skb).portid; 3847 3848 mutex_lock(&rx_queue_mutex); 3849 while (skb->len >= NLMSG_HDRLEN) { 3850 int err; 3851 uint32_t rlen; 3852 struct nlmsghdr *nlh; 3853 struct iscsi_uevent *ev; 3854 uint32_t group; 3855 int retries = ISCSI_SEND_MAX_ALLOWED; 3856 3857 nlh = nlmsg_hdr(skb); 3858 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3859 skb->len < nlh->nlmsg_len) { 3860 break; 3861 } 3862 3863 ev = nlmsg_data(nlh); 3864 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3865 if (rlen > skb->len) 3866 rlen = skb->len; 3867 3868 err = iscsi_if_recv_msg(skb, nlh, &group); 3869 if (err) { 3870 ev->type = ISCSI_KEVENT_IF_ERROR; 3871 ev->iferror = err; 3872 } 3873 do { 3874 /* 3875 * special case for GET_STATS: 3876 * on success - sending reply and stats from 3877 * inside of if_recv_msg(), 3878 * on error - fall through. 3879 */ 3880 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3881 break; 3882 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3883 break; 3884 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3885 ev, sizeof(*ev)); 3886 if (err == -EAGAIN && --retries < 0) { 3887 printk(KERN_WARNING "Send reply failed, error %d\n", err); 3888 break; 3889 } 3890 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3891 skb_pull(skb, rlen); 3892 } 3893 mutex_unlock(&rx_queue_mutex); 3894 } 3895 3896 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3897 struct device_attribute dev_attr_##_prefix##_##_name = \ 3898 __ATTR(_name,_mode,_show,_store) 3899 3900 /* 3901 * iSCSI connection attrs 3902 */ 3903 #define iscsi_conn_attr_show(param) \ 3904 static ssize_t \ 3905 show_conn_param_##param(struct device *dev, \ 3906 struct device_attribute *attr, char *buf) \ 3907 { \ 3908 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3909 struct iscsi_transport *t = conn->transport; \ 3910 return t->get_conn_param(conn, param, buf); \ 3911 } 3912 3913 #define iscsi_conn_attr(field, param) \ 3914 iscsi_conn_attr_show(param) \ 3915 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3916 NULL); 3917 3918 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3919 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3920 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3921 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3922 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3923 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3924 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3925 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3926 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3927 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3928 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3929 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3930 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3931 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3932 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3933 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3934 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3935 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3936 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3937 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3938 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3939 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3940 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3941 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3942 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3943 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3944 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3945 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3946 3947 static const char *const connection_state_names[] = { 3948 [ISCSI_CONN_UP] = "up", 3949 [ISCSI_CONN_DOWN] = "down", 3950 [ISCSI_CONN_FAILED] = "failed" 3951 }; 3952 3953 static ssize_t show_conn_state(struct device *dev, 3954 struct device_attribute *attr, char *buf) 3955 { 3956 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 3957 const char *state = "unknown"; 3958 3959 if (conn->state >= 0 && 3960 conn->state < ARRAY_SIZE(connection_state_names)) 3961 state = connection_state_names[conn->state]; 3962 3963 return sprintf(buf, "%s\n", state); 3964 } 3965 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 3966 NULL); 3967 3968 #define iscsi_conn_ep_attr_show(param) \ 3969 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 3970 struct device_attribute *attr,\ 3971 char *buf) \ 3972 { \ 3973 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3974 struct iscsi_transport *t = conn->transport; \ 3975 struct iscsi_endpoint *ep; \ 3976 ssize_t rc; \ 3977 \ 3978 /* \ 3979 * Need to make sure ep_disconnect does not free the LLD's \ 3980 * interconnect resources while we are trying to read them. \ 3981 */ \ 3982 mutex_lock(&conn->ep_mutex); \ 3983 ep = conn->ep; \ 3984 if (!ep && t->ep_connect) { \ 3985 mutex_unlock(&conn->ep_mutex); \ 3986 return -ENOTCONN; \ 3987 } \ 3988 \ 3989 if (ep) \ 3990 rc = t->get_ep_param(ep, param, buf); \ 3991 else \ 3992 rc = t->get_conn_param(conn, param, buf); \ 3993 mutex_unlock(&conn->ep_mutex); \ 3994 return rc; \ 3995 } 3996 3997 #define iscsi_conn_ep_attr(field, param) \ 3998 iscsi_conn_ep_attr_show(param) \ 3999 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4000 show_conn_ep_param_##param, NULL); 4001 4002 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4003 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4004 4005 static struct attribute *iscsi_conn_attrs[] = { 4006 &dev_attr_conn_max_recv_dlength.attr, 4007 &dev_attr_conn_max_xmit_dlength.attr, 4008 &dev_attr_conn_header_digest.attr, 4009 &dev_attr_conn_data_digest.attr, 4010 &dev_attr_conn_ifmarker.attr, 4011 &dev_attr_conn_ofmarker.attr, 4012 &dev_attr_conn_address.attr, 4013 &dev_attr_conn_port.attr, 4014 &dev_attr_conn_exp_statsn.attr, 4015 &dev_attr_conn_persistent_address.attr, 4016 &dev_attr_conn_persistent_port.attr, 4017 &dev_attr_conn_ping_tmo.attr, 4018 &dev_attr_conn_recv_tmo.attr, 4019 &dev_attr_conn_local_port.attr, 4020 &dev_attr_conn_statsn.attr, 4021 &dev_attr_conn_keepalive_tmo.attr, 4022 &dev_attr_conn_max_segment_size.attr, 4023 &dev_attr_conn_tcp_timestamp_stat.attr, 4024 &dev_attr_conn_tcp_wsf_disable.attr, 4025 &dev_attr_conn_tcp_nagle_disable.attr, 4026 &dev_attr_conn_tcp_timer_scale.attr, 4027 &dev_attr_conn_tcp_timestamp_enable.attr, 4028 &dev_attr_conn_fragment_disable.attr, 4029 &dev_attr_conn_ipv4_tos.attr, 4030 &dev_attr_conn_ipv6_traffic_class.attr, 4031 &dev_attr_conn_ipv6_flow_label.attr, 4032 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4033 &dev_attr_conn_tcp_xmit_wsf.attr, 4034 &dev_attr_conn_tcp_recv_wsf.attr, 4035 &dev_attr_conn_local_ipaddr.attr, 4036 &dev_attr_conn_state.attr, 4037 NULL, 4038 }; 4039 4040 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4041 struct attribute *attr, int i) 4042 { 4043 struct device *cdev = container_of(kobj, struct device, kobj); 4044 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4045 struct iscsi_transport *t = conn->transport; 4046 int param; 4047 4048 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4049 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4050 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4051 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4052 else if (attr == &dev_attr_conn_header_digest.attr) 4053 param = ISCSI_PARAM_HDRDGST_EN; 4054 else if (attr == &dev_attr_conn_data_digest.attr) 4055 param = ISCSI_PARAM_DATADGST_EN; 4056 else if (attr == &dev_attr_conn_ifmarker.attr) 4057 param = ISCSI_PARAM_IFMARKER_EN; 4058 else if (attr == &dev_attr_conn_ofmarker.attr) 4059 param = ISCSI_PARAM_OFMARKER_EN; 4060 else if (attr == &dev_attr_conn_address.attr) 4061 param = ISCSI_PARAM_CONN_ADDRESS; 4062 else if (attr == &dev_attr_conn_port.attr) 4063 param = ISCSI_PARAM_CONN_PORT; 4064 else if (attr == &dev_attr_conn_exp_statsn.attr) 4065 param = ISCSI_PARAM_EXP_STATSN; 4066 else if (attr == &dev_attr_conn_persistent_address.attr) 4067 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4068 else if (attr == &dev_attr_conn_persistent_port.attr) 4069 param = ISCSI_PARAM_PERSISTENT_PORT; 4070 else if (attr == &dev_attr_conn_ping_tmo.attr) 4071 param = ISCSI_PARAM_PING_TMO; 4072 else if (attr == &dev_attr_conn_recv_tmo.attr) 4073 param = ISCSI_PARAM_RECV_TMO; 4074 else if (attr == &dev_attr_conn_local_port.attr) 4075 param = ISCSI_PARAM_LOCAL_PORT; 4076 else if (attr == &dev_attr_conn_statsn.attr) 4077 param = ISCSI_PARAM_STATSN; 4078 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4079 param = ISCSI_PARAM_KEEPALIVE_TMO; 4080 else if (attr == &dev_attr_conn_max_segment_size.attr) 4081 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4082 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4083 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4084 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4085 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4086 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4087 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4088 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4089 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4090 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4091 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4092 else if (attr == &dev_attr_conn_fragment_disable.attr) 4093 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4094 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4095 param = ISCSI_PARAM_IPV4_TOS; 4096 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4097 param = ISCSI_PARAM_IPV6_TC; 4098 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4099 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4100 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4101 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4102 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4103 param = ISCSI_PARAM_TCP_XMIT_WSF; 4104 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4105 param = ISCSI_PARAM_TCP_RECV_WSF; 4106 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4107 param = ISCSI_PARAM_LOCAL_IPADDR; 4108 else if (attr == &dev_attr_conn_state.attr) 4109 return S_IRUGO; 4110 else { 4111 WARN_ONCE(1, "Invalid conn attr"); 4112 return 0; 4113 } 4114 4115 return t->attr_is_visible(ISCSI_PARAM, param); 4116 } 4117 4118 static struct attribute_group iscsi_conn_group = { 4119 .attrs = iscsi_conn_attrs, 4120 .is_visible = iscsi_conn_attr_is_visible, 4121 }; 4122 4123 /* 4124 * iSCSI session attrs 4125 */ 4126 #define iscsi_session_attr_show(param, perm) \ 4127 static ssize_t \ 4128 show_session_param_##param(struct device *dev, \ 4129 struct device_attribute *attr, char *buf) \ 4130 { \ 4131 struct iscsi_cls_session *session = \ 4132 iscsi_dev_to_session(dev->parent); \ 4133 struct iscsi_transport *t = session->transport; \ 4134 \ 4135 if (perm && !capable(CAP_SYS_ADMIN)) \ 4136 return -EACCES; \ 4137 return t->get_session_param(session, param, buf); \ 4138 } 4139 4140 #define iscsi_session_attr(field, param, perm) \ 4141 iscsi_session_attr_show(param, perm) \ 4142 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4143 NULL); 4144 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4145 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4146 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4147 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4148 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4149 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4150 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4151 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4152 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4153 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4154 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4155 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4156 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4157 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4158 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4159 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4160 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4161 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4162 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4163 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4164 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4165 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4166 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4167 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4168 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4169 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4170 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4171 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4172 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4173 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4174 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4175 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4176 iscsi_session_attr(discovery_auth_optional, 4177 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4178 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4179 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4180 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4181 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4182 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4183 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4184 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4185 4186 static ssize_t 4187 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4188 char *buf) 4189 { 4190 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4191 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); 4192 } 4193 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4194 NULL); 4195 static ssize_t 4196 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4197 char *buf) 4198 { 4199 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4200 return sprintf(buf, "%d\n", session->creator); 4201 } 4202 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4203 NULL); 4204 static ssize_t 4205 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4206 char *buf) 4207 { 4208 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4209 return sprintf(buf, "%d\n", session->target_id); 4210 } 4211 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4212 show_priv_session_target_id, NULL); 4213 4214 #define iscsi_priv_session_attr_show(field, format) \ 4215 static ssize_t \ 4216 show_priv_session_##field(struct device *dev, \ 4217 struct device_attribute *attr, char *buf) \ 4218 { \ 4219 struct iscsi_cls_session *session = \ 4220 iscsi_dev_to_session(dev->parent); \ 4221 if (session->field == -1) \ 4222 return sprintf(buf, "off\n"); \ 4223 return sprintf(buf, format"\n", session->field); \ 4224 } 4225 4226 #define iscsi_priv_session_attr_store(field) \ 4227 static ssize_t \ 4228 store_priv_session_##field(struct device *dev, \ 4229 struct device_attribute *attr, \ 4230 const char *buf, size_t count) \ 4231 { \ 4232 int val; \ 4233 char *cp; \ 4234 struct iscsi_cls_session *session = \ 4235 iscsi_dev_to_session(dev->parent); \ 4236 if ((session->state == ISCSI_SESSION_FREE) || \ 4237 (session->state == ISCSI_SESSION_FAILED)) \ 4238 return -EBUSY; \ 4239 if (strncmp(buf, "off", 3) == 0) { \ 4240 session->field = -1; \ 4241 session->field##_sysfs_override = true; \ 4242 } else { \ 4243 val = simple_strtoul(buf, &cp, 0); \ 4244 if (*cp != '\0' && *cp != '\n') \ 4245 return -EINVAL; \ 4246 session->field = val; \ 4247 session->field##_sysfs_override = true; \ 4248 } \ 4249 return count; \ 4250 } 4251 4252 #define iscsi_priv_session_rw_attr(field, format) \ 4253 iscsi_priv_session_attr_show(field, format) \ 4254 iscsi_priv_session_attr_store(field) \ 4255 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4256 show_priv_session_##field, \ 4257 store_priv_session_##field) 4258 4259 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4260 4261 static struct attribute *iscsi_session_attrs[] = { 4262 &dev_attr_sess_initial_r2t.attr, 4263 &dev_attr_sess_max_outstanding_r2t.attr, 4264 &dev_attr_sess_immediate_data.attr, 4265 &dev_attr_sess_first_burst_len.attr, 4266 &dev_attr_sess_max_burst_len.attr, 4267 &dev_attr_sess_data_pdu_in_order.attr, 4268 &dev_attr_sess_data_seq_in_order.attr, 4269 &dev_attr_sess_erl.attr, 4270 &dev_attr_sess_targetname.attr, 4271 &dev_attr_sess_tpgt.attr, 4272 &dev_attr_sess_password.attr, 4273 &dev_attr_sess_password_in.attr, 4274 &dev_attr_sess_username.attr, 4275 &dev_attr_sess_username_in.attr, 4276 &dev_attr_sess_fast_abort.attr, 4277 &dev_attr_sess_abort_tmo.attr, 4278 &dev_attr_sess_lu_reset_tmo.attr, 4279 &dev_attr_sess_tgt_reset_tmo.attr, 4280 &dev_attr_sess_ifacename.attr, 4281 &dev_attr_sess_initiatorname.attr, 4282 &dev_attr_sess_targetalias.attr, 4283 &dev_attr_sess_boot_root.attr, 4284 &dev_attr_sess_boot_nic.attr, 4285 &dev_attr_sess_boot_target.attr, 4286 &dev_attr_priv_sess_recovery_tmo.attr, 4287 &dev_attr_priv_sess_state.attr, 4288 &dev_attr_priv_sess_creator.attr, 4289 &dev_attr_sess_chap_out_idx.attr, 4290 &dev_attr_sess_chap_in_idx.attr, 4291 &dev_attr_priv_sess_target_id.attr, 4292 &dev_attr_sess_auto_snd_tgt_disable.attr, 4293 &dev_attr_sess_discovery_session.attr, 4294 &dev_attr_sess_portal_type.attr, 4295 &dev_attr_sess_chap_auth.attr, 4296 &dev_attr_sess_discovery_logout.attr, 4297 &dev_attr_sess_bidi_chap.attr, 4298 &dev_attr_sess_discovery_auth_optional.attr, 4299 &dev_attr_sess_def_time2wait.attr, 4300 &dev_attr_sess_def_time2retain.attr, 4301 &dev_attr_sess_isid.attr, 4302 &dev_attr_sess_tsid.attr, 4303 &dev_attr_sess_def_taskmgmt_tmo.attr, 4304 &dev_attr_sess_discovery_parent_idx.attr, 4305 &dev_attr_sess_discovery_parent_type.attr, 4306 NULL, 4307 }; 4308 4309 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4310 struct attribute *attr, int i) 4311 { 4312 struct device *cdev = container_of(kobj, struct device, kobj); 4313 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4314 struct iscsi_transport *t = session->transport; 4315 int param; 4316 4317 if (attr == &dev_attr_sess_initial_r2t.attr) 4318 param = ISCSI_PARAM_INITIAL_R2T_EN; 4319 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4320 param = ISCSI_PARAM_MAX_R2T; 4321 else if (attr == &dev_attr_sess_immediate_data.attr) 4322 param = ISCSI_PARAM_IMM_DATA_EN; 4323 else if (attr == &dev_attr_sess_first_burst_len.attr) 4324 param = ISCSI_PARAM_FIRST_BURST; 4325 else if (attr == &dev_attr_sess_max_burst_len.attr) 4326 param = ISCSI_PARAM_MAX_BURST; 4327 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4328 param = ISCSI_PARAM_PDU_INORDER_EN; 4329 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4330 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4331 else if (attr == &dev_attr_sess_erl.attr) 4332 param = ISCSI_PARAM_ERL; 4333 else if (attr == &dev_attr_sess_targetname.attr) 4334 param = ISCSI_PARAM_TARGET_NAME; 4335 else if (attr == &dev_attr_sess_tpgt.attr) 4336 param = ISCSI_PARAM_TPGT; 4337 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4338 param = ISCSI_PARAM_CHAP_IN_IDX; 4339 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4340 param = ISCSI_PARAM_CHAP_OUT_IDX; 4341 else if (attr == &dev_attr_sess_password.attr) 4342 param = ISCSI_PARAM_USERNAME; 4343 else if (attr == &dev_attr_sess_password_in.attr) 4344 param = ISCSI_PARAM_USERNAME_IN; 4345 else if (attr == &dev_attr_sess_username.attr) 4346 param = ISCSI_PARAM_PASSWORD; 4347 else if (attr == &dev_attr_sess_username_in.attr) 4348 param = ISCSI_PARAM_PASSWORD_IN; 4349 else if (attr == &dev_attr_sess_fast_abort.attr) 4350 param = ISCSI_PARAM_FAST_ABORT; 4351 else if (attr == &dev_attr_sess_abort_tmo.attr) 4352 param = ISCSI_PARAM_ABORT_TMO; 4353 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4354 param = ISCSI_PARAM_LU_RESET_TMO; 4355 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4356 param = ISCSI_PARAM_TGT_RESET_TMO; 4357 else if (attr == &dev_attr_sess_ifacename.attr) 4358 param = ISCSI_PARAM_IFACE_NAME; 4359 else if (attr == &dev_attr_sess_initiatorname.attr) 4360 param = ISCSI_PARAM_INITIATOR_NAME; 4361 else if (attr == &dev_attr_sess_targetalias.attr) 4362 param = ISCSI_PARAM_TARGET_ALIAS; 4363 else if (attr == &dev_attr_sess_boot_root.attr) 4364 param = ISCSI_PARAM_BOOT_ROOT; 4365 else if (attr == &dev_attr_sess_boot_nic.attr) 4366 param = ISCSI_PARAM_BOOT_NIC; 4367 else if (attr == &dev_attr_sess_boot_target.attr) 4368 param = ISCSI_PARAM_BOOT_TARGET; 4369 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4370 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4371 else if (attr == &dev_attr_sess_discovery_session.attr) 4372 param = ISCSI_PARAM_DISCOVERY_SESS; 4373 else if (attr == &dev_attr_sess_portal_type.attr) 4374 param = ISCSI_PARAM_PORTAL_TYPE; 4375 else if (attr == &dev_attr_sess_chap_auth.attr) 4376 param = ISCSI_PARAM_CHAP_AUTH_EN; 4377 else if (attr == &dev_attr_sess_discovery_logout.attr) 4378 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4379 else if (attr == &dev_attr_sess_bidi_chap.attr) 4380 param = ISCSI_PARAM_BIDI_CHAP_EN; 4381 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4382 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4383 else if (attr == &dev_attr_sess_def_time2wait.attr) 4384 param = ISCSI_PARAM_DEF_TIME2WAIT; 4385 else if (attr == &dev_attr_sess_def_time2retain.attr) 4386 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4387 else if (attr == &dev_attr_sess_isid.attr) 4388 param = ISCSI_PARAM_ISID; 4389 else if (attr == &dev_attr_sess_tsid.attr) 4390 param = ISCSI_PARAM_TSID; 4391 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4392 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4393 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4394 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4395 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4396 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4397 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4398 return S_IRUGO | S_IWUSR; 4399 else if (attr == &dev_attr_priv_sess_state.attr) 4400 return S_IRUGO; 4401 else if (attr == &dev_attr_priv_sess_creator.attr) 4402 return S_IRUGO; 4403 else if (attr == &dev_attr_priv_sess_target_id.attr) 4404 return S_IRUGO; 4405 else { 4406 WARN_ONCE(1, "Invalid session attr"); 4407 return 0; 4408 } 4409 4410 return t->attr_is_visible(ISCSI_PARAM, param); 4411 } 4412 4413 static struct attribute_group iscsi_session_group = { 4414 .attrs = iscsi_session_attrs, 4415 .is_visible = iscsi_session_attr_is_visible, 4416 }; 4417 4418 /* 4419 * iSCSI host attrs 4420 */ 4421 #define iscsi_host_attr_show(param) \ 4422 static ssize_t \ 4423 show_host_param_##param(struct device *dev, \ 4424 struct device_attribute *attr, char *buf) \ 4425 { \ 4426 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4427 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4428 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4429 } 4430 4431 #define iscsi_host_attr(field, param) \ 4432 iscsi_host_attr_show(param) \ 4433 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4434 NULL); 4435 4436 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4437 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4438 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4439 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4440 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4441 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4442 4443 static struct attribute *iscsi_host_attrs[] = { 4444 &dev_attr_host_netdev.attr, 4445 &dev_attr_host_hwaddress.attr, 4446 &dev_attr_host_ipaddress.attr, 4447 &dev_attr_host_initiatorname.attr, 4448 &dev_attr_host_port_state.attr, 4449 &dev_attr_host_port_speed.attr, 4450 NULL, 4451 }; 4452 4453 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4454 struct attribute *attr, int i) 4455 { 4456 struct device *cdev = container_of(kobj, struct device, kobj); 4457 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4458 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4459 int param; 4460 4461 if (attr == &dev_attr_host_netdev.attr) 4462 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4463 else if (attr == &dev_attr_host_hwaddress.attr) 4464 param = ISCSI_HOST_PARAM_HWADDRESS; 4465 else if (attr == &dev_attr_host_ipaddress.attr) 4466 param = ISCSI_HOST_PARAM_IPADDRESS; 4467 else if (attr == &dev_attr_host_initiatorname.attr) 4468 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4469 else if (attr == &dev_attr_host_port_state.attr) 4470 param = ISCSI_HOST_PARAM_PORT_STATE; 4471 else if (attr == &dev_attr_host_port_speed.attr) 4472 param = ISCSI_HOST_PARAM_PORT_SPEED; 4473 else { 4474 WARN_ONCE(1, "Invalid host attr"); 4475 return 0; 4476 } 4477 4478 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4479 } 4480 4481 static struct attribute_group iscsi_host_group = { 4482 .attrs = iscsi_host_attrs, 4483 .is_visible = iscsi_host_attr_is_visible, 4484 }; 4485 4486 /* convert iscsi_port_speed values to ascii string name */ 4487 static const struct { 4488 enum iscsi_port_speed value; 4489 char *name; 4490 } iscsi_port_speed_names[] = { 4491 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4492 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4493 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4494 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4495 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4496 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4497 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4498 }; 4499 4500 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4501 { 4502 int i; 4503 char *speed = "Unknown!"; 4504 struct iscsi_cls_host *ihost = shost->shost_data; 4505 uint32_t port_speed = ihost->port_speed; 4506 4507 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4508 if (iscsi_port_speed_names[i].value & port_speed) { 4509 speed = iscsi_port_speed_names[i].name; 4510 break; 4511 } 4512 } 4513 return speed; 4514 } 4515 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4516 4517 /* convert iscsi_port_state values to ascii string name */ 4518 static const struct { 4519 enum iscsi_port_state value; 4520 char *name; 4521 } iscsi_port_state_names[] = { 4522 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4523 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4524 }; 4525 4526 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4527 { 4528 int i; 4529 char *state = "Unknown!"; 4530 struct iscsi_cls_host *ihost = shost->shost_data; 4531 uint32_t port_state = ihost->port_state; 4532 4533 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4534 if (iscsi_port_state_names[i].value & port_state) { 4535 state = iscsi_port_state_names[i].name; 4536 break; 4537 } 4538 } 4539 return state; 4540 } 4541 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4542 4543 static int iscsi_session_match(struct attribute_container *cont, 4544 struct device *dev) 4545 { 4546 struct iscsi_cls_session *session; 4547 struct Scsi_Host *shost; 4548 struct iscsi_internal *priv; 4549 4550 if (!iscsi_is_session_dev(dev)) 4551 return 0; 4552 4553 session = iscsi_dev_to_session(dev); 4554 shost = iscsi_session_to_shost(session); 4555 if (!shost->transportt) 4556 return 0; 4557 4558 priv = to_iscsi_internal(shost->transportt); 4559 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4560 return 0; 4561 4562 return &priv->session_cont.ac == cont; 4563 } 4564 4565 static int iscsi_conn_match(struct attribute_container *cont, 4566 struct device *dev) 4567 { 4568 struct iscsi_cls_session *session; 4569 struct iscsi_cls_conn *conn; 4570 struct Scsi_Host *shost; 4571 struct iscsi_internal *priv; 4572 4573 if (!iscsi_is_conn_dev(dev)) 4574 return 0; 4575 4576 conn = iscsi_dev_to_conn(dev); 4577 session = iscsi_dev_to_session(conn->dev.parent); 4578 shost = iscsi_session_to_shost(session); 4579 4580 if (!shost->transportt) 4581 return 0; 4582 4583 priv = to_iscsi_internal(shost->transportt); 4584 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4585 return 0; 4586 4587 return &priv->conn_cont.ac == cont; 4588 } 4589 4590 static int iscsi_host_match(struct attribute_container *cont, 4591 struct device *dev) 4592 { 4593 struct Scsi_Host *shost; 4594 struct iscsi_internal *priv; 4595 4596 if (!scsi_is_host_device(dev)) 4597 return 0; 4598 4599 shost = dev_to_shost(dev); 4600 if (!shost->transportt || 4601 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4602 return 0; 4603 4604 priv = to_iscsi_internal(shost->transportt); 4605 return &priv->t.host_attrs.ac == cont; 4606 } 4607 4608 struct scsi_transport_template * 4609 iscsi_register_transport(struct iscsi_transport *tt) 4610 { 4611 struct iscsi_internal *priv; 4612 unsigned long flags; 4613 int err; 4614 4615 BUG_ON(!tt); 4616 4617 priv = iscsi_if_transport_lookup(tt); 4618 if (priv) 4619 return NULL; 4620 4621 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4622 if (!priv) 4623 return NULL; 4624 INIT_LIST_HEAD(&priv->list); 4625 priv->iscsi_transport = tt; 4626 priv->t.user_scan = iscsi_user_scan; 4627 priv->t.create_work_queue = 1; 4628 4629 priv->dev.class = &iscsi_transport_class; 4630 dev_set_name(&priv->dev, "%s", tt->name); 4631 err = device_register(&priv->dev); 4632 if (err) 4633 goto free_priv; 4634 4635 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4636 if (err) 4637 goto unregister_dev; 4638 4639 /* host parameters */ 4640 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4641 priv->t.host_attrs.ac.match = iscsi_host_match; 4642 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4643 priv->t.host_size = sizeof(struct iscsi_cls_host); 4644 transport_container_register(&priv->t.host_attrs); 4645 4646 /* connection parameters */ 4647 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4648 priv->conn_cont.ac.match = iscsi_conn_match; 4649 priv->conn_cont.ac.grp = &iscsi_conn_group; 4650 transport_container_register(&priv->conn_cont); 4651 4652 /* session parameters */ 4653 priv->session_cont.ac.class = &iscsi_session_class.class; 4654 priv->session_cont.ac.match = iscsi_session_match; 4655 priv->session_cont.ac.grp = &iscsi_session_group; 4656 transport_container_register(&priv->session_cont); 4657 4658 spin_lock_irqsave(&iscsi_transport_lock, flags); 4659 list_add(&priv->list, &iscsi_transports); 4660 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4661 4662 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4663 return &priv->t; 4664 4665 unregister_dev: 4666 device_unregister(&priv->dev); 4667 return NULL; 4668 free_priv: 4669 kfree(priv); 4670 return NULL; 4671 } 4672 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4673 4674 int iscsi_unregister_transport(struct iscsi_transport *tt) 4675 { 4676 struct iscsi_internal *priv; 4677 unsigned long flags; 4678 4679 BUG_ON(!tt); 4680 4681 mutex_lock(&rx_queue_mutex); 4682 4683 priv = iscsi_if_transport_lookup(tt); 4684 BUG_ON (!priv); 4685 4686 spin_lock_irqsave(&iscsi_transport_lock, flags); 4687 list_del(&priv->list); 4688 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4689 4690 transport_container_unregister(&priv->conn_cont); 4691 transport_container_unregister(&priv->session_cont); 4692 transport_container_unregister(&priv->t.host_attrs); 4693 4694 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4695 device_unregister(&priv->dev); 4696 mutex_unlock(&rx_queue_mutex); 4697 4698 return 0; 4699 } 4700 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4701 4702 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4703 struct device *dev, const char *fmt, ...) 4704 { 4705 struct va_format vaf; 4706 va_list args; 4707 4708 va_start(args, fmt); 4709 vaf.fmt = fmt; 4710 vaf.va = &args; 4711 trace(dev, &vaf); 4712 va_end(args); 4713 } 4714 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4715 4716 static __init int iscsi_transport_init(void) 4717 { 4718 int err; 4719 struct netlink_kernel_cfg cfg = { 4720 .groups = 1, 4721 .input = iscsi_if_rx, 4722 }; 4723 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4724 ISCSI_TRANSPORT_VERSION); 4725 4726 atomic_set(&iscsi_session_nr, 0); 4727 4728 err = class_register(&iscsi_transport_class); 4729 if (err) 4730 return err; 4731 4732 err = class_register(&iscsi_endpoint_class); 4733 if (err) 4734 goto unregister_transport_class; 4735 4736 err = class_register(&iscsi_iface_class); 4737 if (err) 4738 goto unregister_endpoint_class; 4739 4740 err = transport_class_register(&iscsi_host_class); 4741 if (err) 4742 goto unregister_iface_class; 4743 4744 err = transport_class_register(&iscsi_connection_class); 4745 if (err) 4746 goto unregister_host_class; 4747 4748 err = transport_class_register(&iscsi_session_class); 4749 if (err) 4750 goto unregister_conn_class; 4751 4752 err = bus_register(&iscsi_flashnode_bus); 4753 if (err) 4754 goto unregister_session_class; 4755 4756 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4757 if (!nls) { 4758 err = -ENOBUFS; 4759 goto unregister_flashnode_bus; 4760 } 4761 4762 iscsi_eh_timer_workq = alloc_workqueue("%s", 4763 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4764 1, "iscsi_eh"); 4765 if (!iscsi_eh_timer_workq) { 4766 err = -ENOMEM; 4767 goto release_nls; 4768 } 4769 4770 iscsi_destroy_workq = alloc_workqueue("%s", 4771 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4772 1, "iscsi_destroy"); 4773 if (!iscsi_destroy_workq) { 4774 err = -ENOMEM; 4775 goto destroy_wq; 4776 } 4777 4778 return 0; 4779 4780 destroy_wq: 4781 destroy_workqueue(iscsi_eh_timer_workq); 4782 release_nls: 4783 netlink_kernel_release(nls); 4784 unregister_flashnode_bus: 4785 bus_unregister(&iscsi_flashnode_bus); 4786 unregister_session_class: 4787 transport_class_unregister(&iscsi_session_class); 4788 unregister_conn_class: 4789 transport_class_unregister(&iscsi_connection_class); 4790 unregister_host_class: 4791 transport_class_unregister(&iscsi_host_class); 4792 unregister_iface_class: 4793 class_unregister(&iscsi_iface_class); 4794 unregister_endpoint_class: 4795 class_unregister(&iscsi_endpoint_class); 4796 unregister_transport_class: 4797 class_unregister(&iscsi_transport_class); 4798 return err; 4799 } 4800 4801 static void __exit iscsi_transport_exit(void) 4802 { 4803 destroy_workqueue(iscsi_destroy_workq); 4804 destroy_workqueue(iscsi_eh_timer_workq); 4805 netlink_kernel_release(nls); 4806 bus_unregister(&iscsi_flashnode_bus); 4807 transport_class_unregister(&iscsi_connection_class); 4808 transport_class_unregister(&iscsi_session_class); 4809 transport_class_unregister(&iscsi_host_class); 4810 class_unregister(&iscsi_endpoint_class); 4811 class_unregister(&iscsi_iface_class); 4812 class_unregister(&iscsi_transport_class); 4813 } 4814 4815 module_init(iscsi_transport_init); 4816 module_exit(iscsi_transport_exit); 4817 4818 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4819 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4820 "Alex Aizman <itn780@yahoo.com>"); 4821 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4822 MODULE_LICENSE("GPL"); 4823 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4824 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4825