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 LIST_HEAD(sessdestroylist); 1627 static DEFINE_SPINLOCK(sesslock); 1628 static LIST_HEAD(connlist); 1629 static LIST_HEAD(connlist_err); 1630 static DEFINE_SPINLOCK(connlock); 1631 1632 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1633 { 1634 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1635 return sess->sid; 1636 } 1637 1638 /* 1639 * Returns the matching session to a given sid 1640 */ 1641 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1642 { 1643 unsigned long flags; 1644 struct iscsi_cls_session *sess; 1645 1646 spin_lock_irqsave(&sesslock, flags); 1647 list_for_each_entry(sess, &sesslist, sess_list) { 1648 if (sess->sid == sid) { 1649 spin_unlock_irqrestore(&sesslock, flags); 1650 return sess; 1651 } 1652 } 1653 spin_unlock_irqrestore(&sesslock, flags); 1654 return NULL; 1655 } 1656 1657 /* 1658 * Returns the matching connection to a given sid / cid tuple 1659 */ 1660 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1661 { 1662 unsigned long flags; 1663 struct iscsi_cls_conn *conn; 1664 1665 spin_lock_irqsave(&connlock, flags); 1666 list_for_each_entry(conn, &connlist, conn_list) { 1667 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1668 spin_unlock_irqrestore(&connlock, flags); 1669 return conn; 1670 } 1671 } 1672 spin_unlock_irqrestore(&connlock, flags); 1673 return NULL; 1674 } 1675 1676 /* 1677 * The following functions can be used by LLDs that allocate 1678 * their own scsi_hosts or by software iscsi LLDs 1679 */ 1680 static struct { 1681 int value; 1682 char *name; 1683 } iscsi_session_state_names[] = { 1684 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1685 { ISCSI_SESSION_FAILED, "FAILED" }, 1686 { ISCSI_SESSION_FREE, "FREE" }, 1687 }; 1688 1689 static const char *iscsi_session_state_name(int state) 1690 { 1691 int i; 1692 char *name = NULL; 1693 1694 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1695 if (iscsi_session_state_names[i].value == state) { 1696 name = iscsi_session_state_names[i].name; 1697 break; 1698 } 1699 } 1700 return name; 1701 } 1702 1703 int iscsi_session_chkready(struct iscsi_cls_session *session) 1704 { 1705 unsigned long flags; 1706 int err; 1707 1708 spin_lock_irqsave(&session->lock, flags); 1709 switch (session->state) { 1710 case ISCSI_SESSION_LOGGED_IN: 1711 err = 0; 1712 break; 1713 case ISCSI_SESSION_FAILED: 1714 err = DID_IMM_RETRY << 16; 1715 break; 1716 case ISCSI_SESSION_FREE: 1717 err = DID_TRANSPORT_FAILFAST << 16; 1718 break; 1719 default: 1720 err = DID_NO_CONNECT << 16; 1721 break; 1722 } 1723 spin_unlock_irqrestore(&session->lock, flags); 1724 return err; 1725 } 1726 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1727 1728 int iscsi_is_session_online(struct iscsi_cls_session *session) 1729 { 1730 unsigned long flags; 1731 int ret = 0; 1732 1733 spin_lock_irqsave(&session->lock, flags); 1734 if (session->state == ISCSI_SESSION_LOGGED_IN) 1735 ret = 1; 1736 spin_unlock_irqrestore(&session->lock, flags); 1737 return ret; 1738 } 1739 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1740 1741 static void iscsi_session_release(struct device *dev) 1742 { 1743 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1744 struct Scsi_Host *shost; 1745 1746 shost = iscsi_session_to_shost(session); 1747 scsi_host_put(shost); 1748 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1749 kfree(session); 1750 } 1751 1752 int iscsi_is_session_dev(const struct device *dev) 1753 { 1754 return dev->release == iscsi_session_release; 1755 } 1756 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1757 1758 static int iscsi_iter_session_fn(struct device *dev, void *data) 1759 { 1760 void (* fn) (struct iscsi_cls_session *) = data; 1761 1762 if (!iscsi_is_session_dev(dev)) 1763 return 0; 1764 fn(iscsi_dev_to_session(dev)); 1765 return 0; 1766 } 1767 1768 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1769 void (*fn)(struct iscsi_cls_session *)) 1770 { 1771 device_for_each_child(&shost->shost_gendev, fn, 1772 iscsi_iter_session_fn); 1773 } 1774 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1775 1776 /** 1777 * iscsi_scan_finished - helper to report when running scans are done 1778 * @shost: scsi host 1779 * @time: scan run time 1780 * 1781 * This function can be used by drives like qla4xxx to report to the scsi 1782 * layer when the scans it kicked off at module load time are done. 1783 */ 1784 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) 1785 { 1786 struct iscsi_cls_host *ihost = shost->shost_data; 1787 /* 1788 * qla4xxx will have kicked off some session unblocks before calling 1789 * scsi_scan_host, so just wait for them to complete. 1790 */ 1791 return !atomic_read(&ihost->nr_scans); 1792 } 1793 EXPORT_SYMBOL_GPL(iscsi_scan_finished); 1794 1795 struct iscsi_scan_data { 1796 unsigned int channel; 1797 unsigned int id; 1798 u64 lun; 1799 enum scsi_scan_mode rescan; 1800 }; 1801 1802 static int iscsi_user_scan_session(struct device *dev, void *data) 1803 { 1804 struct iscsi_scan_data *scan_data = data; 1805 struct iscsi_cls_session *session; 1806 struct Scsi_Host *shost; 1807 struct iscsi_cls_host *ihost; 1808 unsigned long flags; 1809 unsigned int id; 1810 1811 if (!iscsi_is_session_dev(dev)) 1812 return 0; 1813 1814 session = iscsi_dev_to_session(dev); 1815 1816 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1817 1818 shost = iscsi_session_to_shost(session); 1819 ihost = shost->shost_data; 1820 1821 mutex_lock(&ihost->mutex); 1822 spin_lock_irqsave(&session->lock, flags); 1823 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1824 spin_unlock_irqrestore(&session->lock, flags); 1825 goto user_scan_exit; 1826 } 1827 id = session->target_id; 1828 spin_unlock_irqrestore(&session->lock, flags); 1829 1830 if (id != ISCSI_MAX_TARGET) { 1831 if ((scan_data->channel == SCAN_WILD_CARD || 1832 scan_data->channel == 0) && 1833 (scan_data->id == SCAN_WILD_CARD || 1834 scan_data->id == id)) 1835 scsi_scan_target(&session->dev, 0, id, 1836 scan_data->lun, scan_data->rescan); 1837 } 1838 1839 user_scan_exit: 1840 mutex_unlock(&ihost->mutex); 1841 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1842 return 0; 1843 } 1844 1845 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1846 uint id, u64 lun) 1847 { 1848 struct iscsi_scan_data scan_data; 1849 1850 scan_data.channel = channel; 1851 scan_data.id = id; 1852 scan_data.lun = lun; 1853 scan_data.rescan = SCSI_SCAN_MANUAL; 1854 1855 return device_for_each_child(&shost->shost_gendev, &scan_data, 1856 iscsi_user_scan_session); 1857 } 1858 1859 static void iscsi_scan_session(struct work_struct *work) 1860 { 1861 struct iscsi_cls_session *session = 1862 container_of(work, struct iscsi_cls_session, scan_work); 1863 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1864 struct iscsi_cls_host *ihost = shost->shost_data; 1865 struct iscsi_scan_data scan_data; 1866 1867 scan_data.channel = 0; 1868 scan_data.id = SCAN_WILD_CARD; 1869 scan_data.lun = SCAN_WILD_CARD; 1870 scan_data.rescan = SCSI_SCAN_RESCAN; 1871 1872 iscsi_user_scan_session(&session->dev, &scan_data); 1873 atomic_dec(&ihost->nr_scans); 1874 } 1875 1876 /** 1877 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1878 * @cmd: scsi cmd passed to scsi eh handler 1879 * 1880 * If the session is down this function will wait for the recovery 1881 * timer to fire or for the session to be logged back in. If the 1882 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1883 * should pass this error value to the scsi eh. 1884 */ 1885 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1886 { 1887 struct iscsi_cls_session *session = 1888 starget_to_session(scsi_target(cmd->device)); 1889 unsigned long flags; 1890 int ret = 0; 1891 1892 spin_lock_irqsave(&session->lock, flags); 1893 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1894 if (session->state == ISCSI_SESSION_FREE) { 1895 ret = FAST_IO_FAIL; 1896 break; 1897 } 1898 spin_unlock_irqrestore(&session->lock, flags); 1899 msleep(1000); 1900 spin_lock_irqsave(&session->lock, flags); 1901 } 1902 spin_unlock_irqrestore(&session->lock, flags); 1903 return ret; 1904 } 1905 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1906 1907 static void session_recovery_timedout(struct work_struct *work) 1908 { 1909 struct iscsi_cls_session *session = 1910 container_of(work, struct iscsi_cls_session, 1911 recovery_work.work); 1912 unsigned long flags; 1913 1914 iscsi_cls_session_printk(KERN_INFO, session, 1915 "session recovery timed out after %d secs\n", 1916 session->recovery_tmo); 1917 1918 spin_lock_irqsave(&session->lock, flags); 1919 switch (session->state) { 1920 case ISCSI_SESSION_FAILED: 1921 session->state = ISCSI_SESSION_FREE; 1922 break; 1923 case ISCSI_SESSION_LOGGED_IN: 1924 case ISCSI_SESSION_FREE: 1925 /* we raced with the unblock's flush */ 1926 spin_unlock_irqrestore(&session->lock, flags); 1927 return; 1928 } 1929 spin_unlock_irqrestore(&session->lock, flags); 1930 1931 if (session->transport->session_recovery_timedout) 1932 session->transport->session_recovery_timedout(session); 1933 1934 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1935 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1936 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1937 } 1938 1939 static void __iscsi_unblock_session(struct work_struct *work) 1940 { 1941 struct iscsi_cls_session *session = 1942 container_of(work, struct iscsi_cls_session, 1943 unblock_work); 1944 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1945 struct iscsi_cls_host *ihost = shost->shost_data; 1946 unsigned long flags; 1947 1948 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1949 /* 1950 * The recovery and unblock work get run from the same workqueue, 1951 * so try to cancel it if it was going to run after this unblock. 1952 */ 1953 cancel_delayed_work(&session->recovery_work); 1954 spin_lock_irqsave(&session->lock, flags); 1955 session->state = ISCSI_SESSION_LOGGED_IN; 1956 spin_unlock_irqrestore(&session->lock, flags); 1957 /* start IO */ 1958 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1959 /* 1960 * Only do kernel scanning if the driver is properly hooked into 1961 * the async scanning code (drivers like iscsi_tcp do login and 1962 * scanning from userspace). 1963 */ 1964 if (shost->hostt->scan_finished) { 1965 if (scsi_queue_work(shost, &session->scan_work)) 1966 atomic_inc(&ihost->nr_scans); 1967 } 1968 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1969 } 1970 1971 /** 1972 * iscsi_unblock_session - set a session as logged in and start IO. 1973 * @session: iscsi session 1974 * 1975 * Mark a session as ready to accept IO. 1976 */ 1977 void iscsi_unblock_session(struct iscsi_cls_session *session) 1978 { 1979 queue_work(iscsi_eh_timer_workq, &session->unblock_work); 1980 /* 1981 * make sure all the events have completed before tell the driver 1982 * it is safe 1983 */ 1984 flush_workqueue(iscsi_eh_timer_workq); 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 if (session->ida_used) 2040 ida_simple_remove(&iscsi_sess_ida, target_id); 2041 2042 scsi_remove_target(&session->dev); 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 list_del(&session->sess_list); 2206 spin_unlock_irqrestore(&sesslock, flags); 2207 2208 /* make sure there are no blocks/unblocks queued */ 2209 flush_workqueue(iscsi_eh_timer_workq); 2210 /* make sure the timedout callout is not running */ 2211 if (!cancel_delayed_work(&session->recovery_work)) 2212 flush_workqueue(iscsi_eh_timer_workq); 2213 /* 2214 * If we are blocked let commands flow again. The lld or iscsi 2215 * layer should set up the queuecommand to fail commands. 2216 * We assume that LLD will not be calling block/unblock while 2217 * removing the session. 2218 */ 2219 spin_lock_irqsave(&session->lock, flags); 2220 session->state = ISCSI_SESSION_FREE; 2221 spin_unlock_irqrestore(&session->lock, flags); 2222 2223 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2224 /* flush running scans then delete devices */ 2225 flush_work(&session->scan_work); 2226 /* flush running unbind operations */ 2227 flush_work(&session->unbind_work); 2228 __iscsi_unbind_session(&session->unbind_work); 2229 2230 /* hw iscsi may not have removed all connections from session */ 2231 err = device_for_each_child(&session->dev, NULL, 2232 iscsi_iter_destroy_conn_fn); 2233 if (err) 2234 iscsi_cls_session_printk(KERN_ERR, session, 2235 "Could not delete all connections " 2236 "for session. Error %d.\n", err); 2237 2238 transport_unregister_device(&session->dev); 2239 2240 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2241 device_del(&session->dev); 2242 } 2243 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2244 2245 void iscsi_free_session(struct iscsi_cls_session *session) 2246 { 2247 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2248 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2249 put_device(&session->dev); 2250 } 2251 EXPORT_SYMBOL_GPL(iscsi_free_session); 2252 2253 /** 2254 * iscsi_create_conn - create iscsi class connection 2255 * @session: iscsi cls session 2256 * @dd_size: private driver data size 2257 * @cid: connection id 2258 * 2259 * This can be called from a LLD or iscsi_transport. The connection 2260 * is child of the session so cid must be unique for all connections 2261 * on the session. 2262 * 2263 * Since we do not support MCS, cid will normally be zero. In some cases 2264 * for software iscsi we could be trying to preallocate a connection struct 2265 * in which case there could be two connection structs and cid would be 2266 * non-zero. 2267 */ 2268 struct iscsi_cls_conn * 2269 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2270 { 2271 struct iscsi_transport *transport = session->transport; 2272 struct iscsi_cls_conn *conn; 2273 unsigned long flags; 2274 int err; 2275 2276 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2277 if (!conn) 2278 return NULL; 2279 if (dd_size) 2280 conn->dd_data = &conn[1]; 2281 2282 mutex_init(&conn->ep_mutex); 2283 INIT_LIST_HEAD(&conn->conn_list); 2284 INIT_LIST_HEAD(&conn->conn_list_err); 2285 conn->transport = transport; 2286 conn->cid = cid; 2287 conn->state = ISCSI_CONN_DOWN; 2288 2289 /* this is released in the dev's release function */ 2290 if (!get_device(&session->dev)) 2291 goto free_conn; 2292 2293 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2294 conn->dev.parent = &session->dev; 2295 conn->dev.release = iscsi_conn_release; 2296 err = device_register(&conn->dev); 2297 if (err) { 2298 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2299 "register connection's dev\n"); 2300 goto release_parent_ref; 2301 } 2302 err = transport_register_device(&conn->dev); 2303 if (err) { 2304 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2305 "register transport's dev\n"); 2306 goto release_conn_ref; 2307 } 2308 2309 spin_lock_irqsave(&connlock, flags); 2310 list_add(&conn->conn_list, &connlist); 2311 spin_unlock_irqrestore(&connlock, flags); 2312 2313 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); 2314 return conn; 2315 2316 release_conn_ref: 2317 put_device(&conn->dev); 2318 release_parent_ref: 2319 put_device(&session->dev); 2320 free_conn: 2321 kfree(conn); 2322 return NULL; 2323 } 2324 2325 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2326 2327 /** 2328 * iscsi_destroy_conn - destroy iscsi class connection 2329 * @conn: iscsi cls session 2330 * 2331 * This can be called from a LLD or iscsi_transport. 2332 */ 2333 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2334 { 2335 unsigned long flags; 2336 2337 spin_lock_irqsave(&connlock, flags); 2338 list_del(&conn->conn_list); 2339 list_del(&conn->conn_list_err); 2340 spin_unlock_irqrestore(&connlock, flags); 2341 2342 transport_unregister_device(&conn->dev); 2343 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2344 device_unregister(&conn->dev); 2345 return 0; 2346 } 2347 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2348 2349 /* 2350 * iscsi interface functions 2351 */ 2352 static struct iscsi_internal * 2353 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2354 { 2355 struct iscsi_internal *priv; 2356 unsigned long flags; 2357 2358 spin_lock_irqsave(&iscsi_transport_lock, flags); 2359 list_for_each_entry(priv, &iscsi_transports, list) { 2360 if (tt == priv->iscsi_transport) { 2361 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2362 return priv; 2363 } 2364 } 2365 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2366 return NULL; 2367 } 2368 2369 static int 2370 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2371 { 2372 return nlmsg_multicast(nls, skb, 0, group, gfp); 2373 } 2374 2375 static int 2376 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2377 { 2378 return nlmsg_unicast(nls, skb, portid); 2379 } 2380 2381 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2382 char *data, uint32_t data_size) 2383 { 2384 struct nlmsghdr *nlh; 2385 struct sk_buff *skb; 2386 struct iscsi_uevent *ev; 2387 char *pdu; 2388 struct iscsi_internal *priv; 2389 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2390 data_size); 2391 2392 priv = iscsi_if_transport_lookup(conn->transport); 2393 if (!priv) 2394 return -EINVAL; 2395 2396 skb = alloc_skb(len, GFP_ATOMIC); 2397 if (!skb) { 2398 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2399 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2400 "control PDU: OOM\n"); 2401 return -ENOMEM; 2402 } 2403 2404 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2405 ev = nlmsg_data(nlh); 2406 memset(ev, 0, sizeof(*ev)); 2407 ev->transport_handle = iscsi_handle(conn->transport); 2408 ev->type = ISCSI_KEVENT_RECV_PDU; 2409 ev->r.recv_req.cid = conn->cid; 2410 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2411 pdu = (char*)ev + sizeof(*ev); 2412 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2413 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2414 2415 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2416 } 2417 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2418 2419 int iscsi_offload_mesg(struct Scsi_Host *shost, 2420 struct iscsi_transport *transport, uint32_t type, 2421 char *data, uint16_t data_size) 2422 { 2423 struct nlmsghdr *nlh; 2424 struct sk_buff *skb; 2425 struct iscsi_uevent *ev; 2426 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2427 2428 skb = alloc_skb(len, GFP_ATOMIC); 2429 if (!skb) { 2430 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2431 return -ENOMEM; 2432 } 2433 2434 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2435 ev = nlmsg_data(nlh); 2436 memset(ev, 0, sizeof(*ev)); 2437 ev->type = type; 2438 ev->transport_handle = iscsi_handle(transport); 2439 switch (type) { 2440 case ISCSI_KEVENT_PATH_REQ: 2441 ev->r.req_path.host_no = shost->host_no; 2442 break; 2443 case ISCSI_KEVENT_IF_DOWN: 2444 ev->r.notify_if_down.host_no = shost->host_no; 2445 break; 2446 } 2447 2448 memcpy((char *)ev + sizeof(*ev), data, data_size); 2449 2450 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2451 } 2452 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2453 2454 /* 2455 * This can be called without the rx_queue_mutex, if invoked by the kernel 2456 * stop work. But, in that case, it is guaranteed not to race with 2457 * iscsi_destroy by conn_mutex. 2458 */ 2459 static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2460 { 2461 /* 2462 * It is important that this path doesn't rely on 2463 * rx_queue_mutex, otherwise, a thread doing allocation on a 2464 * start_session/start_connection could sleep waiting on a 2465 * writeback to a failed iscsi device, that cannot be recovered 2466 * because the lock is held. If we don't hold it here, the 2467 * kernel stop_conn_work_fn has a chance to stop the broken 2468 * session and resolve the allocation. 2469 * 2470 * Still, the user invoked .stop_conn() needs to be serialized 2471 * with stop_conn_work_fn by a private mutex. Not pretty, but 2472 * it works. 2473 */ 2474 mutex_lock(&conn_mutex); 2475 conn->transport->stop_conn(conn, flag); 2476 mutex_unlock(&conn_mutex); 2477 2478 } 2479 2480 static void stop_conn_work_fn(struct work_struct *work) 2481 { 2482 struct iscsi_cls_conn *conn, *tmp; 2483 unsigned long flags; 2484 LIST_HEAD(recovery_list); 2485 2486 spin_lock_irqsave(&connlock, flags); 2487 if (list_empty(&connlist_err)) { 2488 spin_unlock_irqrestore(&connlock, flags); 2489 return; 2490 } 2491 list_splice_init(&connlist_err, &recovery_list); 2492 spin_unlock_irqrestore(&connlock, flags); 2493 2494 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) { 2495 uint32_t sid = iscsi_conn_get_sid(conn); 2496 struct iscsi_cls_session *session; 2497 2498 session = iscsi_session_lookup(sid); 2499 if (session) { 2500 if (system_state != SYSTEM_RUNNING) { 2501 session->recovery_tmo = 0; 2502 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2503 } else { 2504 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER); 2505 } 2506 } 2507 2508 list_del_init(&conn->conn_list_err); 2509 } 2510 } 2511 2512 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2513 { 2514 struct nlmsghdr *nlh; 2515 struct sk_buff *skb; 2516 struct iscsi_uevent *ev; 2517 struct iscsi_internal *priv; 2518 int len = nlmsg_total_size(sizeof(*ev)); 2519 unsigned long flags; 2520 2521 spin_lock_irqsave(&connlock, flags); 2522 list_add(&conn->conn_list_err, &connlist_err); 2523 spin_unlock_irqrestore(&connlock, flags); 2524 queue_work(system_unbound_wq, &stop_conn_work); 2525 2526 priv = iscsi_if_transport_lookup(conn->transport); 2527 if (!priv) 2528 return; 2529 2530 skb = alloc_skb(len, GFP_ATOMIC); 2531 if (!skb) { 2532 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2533 "conn error (%d)\n", error); 2534 return; 2535 } 2536 2537 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2538 ev = nlmsg_data(nlh); 2539 ev->transport_handle = iscsi_handle(conn->transport); 2540 ev->type = ISCSI_KEVENT_CONN_ERROR; 2541 ev->r.connerror.error = error; 2542 ev->r.connerror.cid = conn->cid; 2543 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2544 2545 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2546 2547 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2548 error); 2549 } 2550 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2551 2552 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2553 enum iscsi_conn_state state) 2554 { 2555 struct nlmsghdr *nlh; 2556 struct sk_buff *skb; 2557 struct iscsi_uevent *ev; 2558 struct iscsi_internal *priv; 2559 int len = nlmsg_total_size(sizeof(*ev)); 2560 2561 priv = iscsi_if_transport_lookup(conn->transport); 2562 if (!priv) 2563 return; 2564 2565 skb = alloc_skb(len, GFP_ATOMIC); 2566 if (!skb) { 2567 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2568 "conn login (%d)\n", state); 2569 return; 2570 } 2571 2572 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2573 ev = nlmsg_data(nlh); 2574 ev->transport_handle = iscsi_handle(conn->transport); 2575 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2576 ev->r.conn_login.state = state; 2577 ev->r.conn_login.cid = conn->cid; 2578 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2579 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2580 2581 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2582 state); 2583 } 2584 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2585 2586 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2587 enum iscsi_host_event_code code, uint32_t data_size, 2588 uint8_t *data) 2589 { 2590 struct nlmsghdr *nlh; 2591 struct sk_buff *skb; 2592 struct iscsi_uevent *ev; 2593 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2594 2595 skb = alloc_skb(len, GFP_NOIO); 2596 if (!skb) { 2597 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2598 host_no, code); 2599 return; 2600 } 2601 2602 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2603 ev = nlmsg_data(nlh); 2604 ev->transport_handle = iscsi_handle(transport); 2605 ev->type = ISCSI_KEVENT_HOST_EVENT; 2606 ev->r.host_event.host_no = host_no; 2607 ev->r.host_event.code = code; 2608 ev->r.host_event.data_size = data_size; 2609 2610 if (data_size) 2611 memcpy((char *)ev + sizeof(*ev), data, data_size); 2612 2613 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2614 } 2615 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2616 2617 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2618 uint32_t status, uint32_t pid, uint32_t data_size, 2619 uint8_t *data) 2620 { 2621 struct nlmsghdr *nlh; 2622 struct sk_buff *skb; 2623 struct iscsi_uevent *ev; 2624 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2625 2626 skb = alloc_skb(len, GFP_NOIO); 2627 if (!skb) { 2628 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2629 return; 2630 } 2631 2632 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2633 ev = nlmsg_data(nlh); 2634 ev->transport_handle = iscsi_handle(transport); 2635 ev->type = ISCSI_KEVENT_PING_COMP; 2636 ev->r.ping_comp.host_no = host_no; 2637 ev->r.ping_comp.status = status; 2638 ev->r.ping_comp.pid = pid; 2639 ev->r.ping_comp.data_size = data_size; 2640 memcpy((char *)ev + sizeof(*ev), data, data_size); 2641 2642 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2643 } 2644 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2645 2646 static int 2647 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2648 { 2649 struct sk_buff *skb; 2650 struct nlmsghdr *nlh; 2651 int len = nlmsg_total_size(size); 2652 2653 skb = alloc_skb(len, GFP_ATOMIC); 2654 if (!skb) { 2655 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2656 return -ENOMEM; 2657 } 2658 2659 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2660 memcpy(nlmsg_data(nlh), payload, size); 2661 return iscsi_unicast_skb(skb, portid); 2662 } 2663 2664 static int 2665 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2666 { 2667 struct iscsi_uevent *ev = nlmsg_data(nlh); 2668 struct iscsi_stats *stats; 2669 struct sk_buff *skbstat; 2670 struct iscsi_cls_conn *conn; 2671 struct nlmsghdr *nlhstat; 2672 struct iscsi_uevent *evstat; 2673 struct iscsi_internal *priv; 2674 int len = nlmsg_total_size(sizeof(*ev) + 2675 sizeof(struct iscsi_stats) + 2676 sizeof(struct iscsi_stats_custom) * 2677 ISCSI_STATS_CUSTOM_MAX); 2678 int err = 0; 2679 2680 priv = iscsi_if_transport_lookup(transport); 2681 if (!priv) 2682 return -EINVAL; 2683 2684 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2685 if (!conn) 2686 return -EEXIST; 2687 2688 do { 2689 int actual_size; 2690 2691 skbstat = alloc_skb(len, GFP_ATOMIC); 2692 if (!skbstat) { 2693 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2694 "deliver stats: OOM\n"); 2695 return -ENOMEM; 2696 } 2697 2698 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2699 (len - sizeof(*nlhstat)), 0); 2700 evstat = nlmsg_data(nlhstat); 2701 memset(evstat, 0, sizeof(*evstat)); 2702 evstat->transport_handle = iscsi_handle(conn->transport); 2703 evstat->type = nlh->nlmsg_type; 2704 evstat->u.get_stats.cid = 2705 ev->u.get_stats.cid; 2706 evstat->u.get_stats.sid = 2707 ev->u.get_stats.sid; 2708 stats = (struct iscsi_stats *) 2709 ((char*)evstat + sizeof(*evstat)); 2710 memset(stats, 0, sizeof(*stats)); 2711 2712 transport->get_stats(conn, stats); 2713 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2714 sizeof(struct iscsi_stats) + 2715 sizeof(struct iscsi_stats_custom) * 2716 stats->custom_length); 2717 actual_size -= sizeof(*nlhstat); 2718 actual_size = nlmsg_msg_size(actual_size); 2719 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2720 nlhstat->nlmsg_len = actual_size; 2721 2722 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2723 GFP_ATOMIC); 2724 } while (err < 0 && err != -ECONNREFUSED); 2725 2726 return err; 2727 } 2728 2729 /** 2730 * iscsi_session_event - send session destr. completion event 2731 * @session: iscsi class session 2732 * @event: type of event 2733 */ 2734 int iscsi_session_event(struct iscsi_cls_session *session, 2735 enum iscsi_uevent_e event) 2736 { 2737 struct iscsi_internal *priv; 2738 struct Scsi_Host *shost; 2739 struct iscsi_uevent *ev; 2740 struct sk_buff *skb; 2741 struct nlmsghdr *nlh; 2742 int rc, len = nlmsg_total_size(sizeof(*ev)); 2743 2744 priv = iscsi_if_transport_lookup(session->transport); 2745 if (!priv) 2746 return -EINVAL; 2747 shost = iscsi_session_to_shost(session); 2748 2749 skb = alloc_skb(len, GFP_KERNEL); 2750 if (!skb) { 2751 iscsi_cls_session_printk(KERN_ERR, session, 2752 "Cannot notify userspace of session " 2753 "event %u\n", event); 2754 return -ENOMEM; 2755 } 2756 2757 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2758 ev = nlmsg_data(nlh); 2759 ev->transport_handle = iscsi_handle(session->transport); 2760 2761 ev->type = event; 2762 switch (event) { 2763 case ISCSI_KEVENT_DESTROY_SESSION: 2764 ev->r.d_session.host_no = shost->host_no; 2765 ev->r.d_session.sid = session->sid; 2766 break; 2767 case ISCSI_KEVENT_CREATE_SESSION: 2768 ev->r.c_session_ret.host_no = shost->host_no; 2769 ev->r.c_session_ret.sid = session->sid; 2770 break; 2771 case ISCSI_KEVENT_UNBIND_SESSION: 2772 ev->r.unbind_session.host_no = shost->host_no; 2773 ev->r.unbind_session.sid = session->sid; 2774 break; 2775 default: 2776 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2777 "%u.\n", event); 2778 kfree_skb(skb); 2779 return -EINVAL; 2780 } 2781 2782 /* 2783 * this will occur if the daemon is not up, so we just warn 2784 * the user and when the daemon is restarted it will handle it 2785 */ 2786 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2787 if (rc == -ESRCH) 2788 iscsi_cls_session_printk(KERN_ERR, session, 2789 "Cannot notify userspace of session " 2790 "event %u. Check iscsi daemon\n", 2791 event); 2792 2793 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2794 event, rc); 2795 return rc; 2796 } 2797 EXPORT_SYMBOL_GPL(iscsi_session_event); 2798 2799 static int 2800 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2801 struct iscsi_uevent *ev, pid_t pid, 2802 uint32_t initial_cmdsn, uint16_t cmds_max, 2803 uint16_t queue_depth) 2804 { 2805 struct iscsi_transport *transport = priv->iscsi_transport; 2806 struct iscsi_cls_session *session; 2807 struct Scsi_Host *shost; 2808 2809 session = transport->create_session(ep, cmds_max, queue_depth, 2810 initial_cmdsn); 2811 if (!session) 2812 return -ENOMEM; 2813 2814 session->creator = pid; 2815 shost = iscsi_session_to_shost(session); 2816 ev->r.c_session_ret.host_no = shost->host_no; 2817 ev->r.c_session_ret.sid = session->sid; 2818 ISCSI_DBG_TRANS_SESSION(session, 2819 "Completed creating transport session\n"); 2820 return 0; 2821 } 2822 2823 static int 2824 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2825 { 2826 struct iscsi_cls_conn *conn; 2827 struct iscsi_cls_session *session; 2828 2829 session = iscsi_session_lookup(ev->u.c_conn.sid); 2830 if (!session) { 2831 printk(KERN_ERR "iscsi: invalid session %d.\n", 2832 ev->u.c_conn.sid); 2833 return -EINVAL; 2834 } 2835 2836 conn = transport->create_conn(session, ev->u.c_conn.cid); 2837 if (!conn) { 2838 iscsi_cls_session_printk(KERN_ERR, session, 2839 "couldn't create a new connection."); 2840 return -ENOMEM; 2841 } 2842 2843 ev->r.c_conn_ret.sid = session->sid; 2844 ev->r.c_conn_ret.cid = conn->cid; 2845 2846 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2847 return 0; 2848 } 2849 2850 static int 2851 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2852 { 2853 struct iscsi_cls_conn *conn; 2854 unsigned long flags; 2855 2856 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2857 if (!conn) 2858 return -EINVAL; 2859 2860 spin_lock_irqsave(&connlock, flags); 2861 if (!list_empty(&conn->conn_list_err)) { 2862 spin_unlock_irqrestore(&connlock, flags); 2863 return -EAGAIN; 2864 } 2865 spin_unlock_irqrestore(&connlock, flags); 2866 2867 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2868 2869 mutex_lock(&conn_mutex); 2870 if (transport->destroy_conn) 2871 transport->destroy_conn(conn); 2872 mutex_unlock(&conn_mutex); 2873 2874 return 0; 2875 } 2876 2877 static int 2878 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2879 { 2880 char *data = (char*)ev + sizeof(*ev); 2881 struct iscsi_cls_conn *conn; 2882 struct iscsi_cls_session *session; 2883 int err = 0, value = 0; 2884 2885 session = iscsi_session_lookup(ev->u.set_param.sid); 2886 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2887 if (!conn || !session) 2888 return -EINVAL; 2889 2890 switch (ev->u.set_param.param) { 2891 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2892 sscanf(data, "%d", &value); 2893 if (!session->recovery_tmo_sysfs_override) 2894 session->recovery_tmo = value; 2895 break; 2896 default: 2897 err = transport->set_param(conn, ev->u.set_param.param, 2898 data, ev->u.set_param.len); 2899 } 2900 2901 return err; 2902 } 2903 2904 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2905 struct iscsi_uevent *ev, int msg_type) 2906 { 2907 struct iscsi_endpoint *ep; 2908 struct sockaddr *dst_addr; 2909 struct Scsi_Host *shost = NULL; 2910 int non_blocking, err = 0; 2911 2912 if (!transport->ep_connect) 2913 return -EINVAL; 2914 2915 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2916 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2917 if (!shost) { 2918 printk(KERN_ERR "ep connect failed. Could not find " 2919 "host no %u\n", 2920 ev->u.ep_connect_through_host.host_no); 2921 return -ENODEV; 2922 } 2923 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2924 } else 2925 non_blocking = ev->u.ep_connect.non_blocking; 2926 2927 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2928 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2929 if (IS_ERR(ep)) { 2930 err = PTR_ERR(ep); 2931 goto release_host; 2932 } 2933 2934 ev->r.ep_connect_ret.handle = ep->id; 2935 release_host: 2936 if (shost) 2937 scsi_host_put(shost); 2938 return err; 2939 } 2940 2941 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2942 u64 ep_handle) 2943 { 2944 struct iscsi_cls_conn *conn; 2945 struct iscsi_endpoint *ep; 2946 2947 if (!transport->ep_disconnect) 2948 return -EINVAL; 2949 2950 ep = iscsi_lookup_endpoint(ep_handle); 2951 if (!ep) 2952 return -EINVAL; 2953 conn = ep->conn; 2954 if (conn) { 2955 mutex_lock(&conn->ep_mutex); 2956 conn->ep = NULL; 2957 mutex_unlock(&conn->ep_mutex); 2958 } 2959 2960 transport->ep_disconnect(ep); 2961 return 0; 2962 } 2963 2964 static int 2965 iscsi_if_transport_ep(struct iscsi_transport *transport, 2966 struct iscsi_uevent *ev, int msg_type) 2967 { 2968 struct iscsi_endpoint *ep; 2969 int rc = 0; 2970 2971 switch (msg_type) { 2972 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2973 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2974 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2975 break; 2976 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2977 if (!transport->ep_poll) 2978 return -EINVAL; 2979 2980 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2981 if (!ep) 2982 return -EINVAL; 2983 2984 ev->r.retcode = transport->ep_poll(ep, 2985 ev->u.ep_poll.timeout_ms); 2986 break; 2987 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 2988 rc = iscsi_if_ep_disconnect(transport, 2989 ev->u.ep_disconnect.ep_handle); 2990 break; 2991 } 2992 return rc; 2993 } 2994 2995 static int 2996 iscsi_tgt_dscvr(struct iscsi_transport *transport, 2997 struct iscsi_uevent *ev) 2998 { 2999 struct Scsi_Host *shost; 3000 struct sockaddr *dst_addr; 3001 int err; 3002 3003 if (!transport->tgt_dscvr) 3004 return -EINVAL; 3005 3006 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3007 if (!shost) { 3008 printk(KERN_ERR "target discovery could not find host no %u\n", 3009 ev->u.tgt_dscvr.host_no); 3010 return -ENODEV; 3011 } 3012 3013 3014 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3015 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3016 ev->u.tgt_dscvr.enable, dst_addr); 3017 scsi_host_put(shost); 3018 return err; 3019 } 3020 3021 static int 3022 iscsi_set_host_param(struct iscsi_transport *transport, 3023 struct iscsi_uevent *ev) 3024 { 3025 char *data = (char*)ev + sizeof(*ev); 3026 struct Scsi_Host *shost; 3027 int err; 3028 3029 if (!transport->set_host_param) 3030 return -ENOSYS; 3031 3032 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3033 if (!shost) { 3034 printk(KERN_ERR "set_host_param could not find host no %u\n", 3035 ev->u.set_host_param.host_no); 3036 return -ENODEV; 3037 } 3038 3039 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3040 data, ev->u.set_host_param.len); 3041 scsi_host_put(shost); 3042 return err; 3043 } 3044 3045 static int 3046 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3047 { 3048 struct Scsi_Host *shost; 3049 struct iscsi_path *params; 3050 int err; 3051 3052 if (!transport->set_path) 3053 return -ENOSYS; 3054 3055 shost = scsi_host_lookup(ev->u.set_path.host_no); 3056 if (!shost) { 3057 printk(KERN_ERR "set path could not find host no %u\n", 3058 ev->u.set_path.host_no); 3059 return -ENODEV; 3060 } 3061 3062 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3063 err = transport->set_path(shost, params); 3064 3065 scsi_host_put(shost); 3066 return err; 3067 } 3068 3069 static int iscsi_session_has_conns(int sid) 3070 { 3071 struct iscsi_cls_conn *conn; 3072 unsigned long flags; 3073 int found = 0; 3074 3075 spin_lock_irqsave(&connlock, flags); 3076 list_for_each_entry(conn, &connlist, conn_list) { 3077 if (iscsi_conn_get_sid(conn) == sid) { 3078 found = 1; 3079 break; 3080 } 3081 } 3082 spin_unlock_irqrestore(&connlock, flags); 3083 3084 return found; 3085 } 3086 3087 static int 3088 iscsi_set_iface_params(struct iscsi_transport *transport, 3089 struct iscsi_uevent *ev, uint32_t len) 3090 { 3091 char *data = (char *)ev + sizeof(*ev); 3092 struct Scsi_Host *shost; 3093 int err; 3094 3095 if (!transport->set_iface_param) 3096 return -ENOSYS; 3097 3098 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3099 if (!shost) { 3100 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3101 ev->u.set_iface_params.host_no); 3102 return -ENODEV; 3103 } 3104 3105 err = transport->set_iface_param(shost, data, len); 3106 scsi_host_put(shost); 3107 return err; 3108 } 3109 3110 static int 3111 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3112 { 3113 struct Scsi_Host *shost; 3114 struct sockaddr *dst_addr; 3115 int err; 3116 3117 if (!transport->send_ping) 3118 return -ENOSYS; 3119 3120 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3121 if (!shost) { 3122 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3123 ev->u.iscsi_ping.host_no); 3124 return -ENODEV; 3125 } 3126 3127 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3128 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3129 ev->u.iscsi_ping.iface_type, 3130 ev->u.iscsi_ping.payload_size, 3131 ev->u.iscsi_ping.pid, 3132 dst_addr); 3133 scsi_host_put(shost); 3134 return err; 3135 } 3136 3137 static int 3138 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3139 { 3140 struct iscsi_uevent *ev = nlmsg_data(nlh); 3141 struct Scsi_Host *shost = NULL; 3142 struct iscsi_chap_rec *chap_rec; 3143 struct iscsi_internal *priv; 3144 struct sk_buff *skbchap; 3145 struct nlmsghdr *nlhchap; 3146 struct iscsi_uevent *evchap; 3147 uint32_t chap_buf_size; 3148 int len, err = 0; 3149 char *buf; 3150 3151 if (!transport->get_chap) 3152 return -EINVAL; 3153 3154 priv = iscsi_if_transport_lookup(transport); 3155 if (!priv) 3156 return -EINVAL; 3157 3158 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3159 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3160 3161 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3162 if (!shost) { 3163 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3164 __func__, ev->u.get_chap.host_no); 3165 return -ENODEV; 3166 } 3167 3168 do { 3169 int actual_size; 3170 3171 skbchap = alloc_skb(len, GFP_KERNEL); 3172 if (!skbchap) { 3173 printk(KERN_ERR "can not deliver chap: OOM\n"); 3174 err = -ENOMEM; 3175 goto exit_get_chap; 3176 } 3177 3178 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3179 (len - sizeof(*nlhchap)), 0); 3180 evchap = nlmsg_data(nlhchap); 3181 memset(evchap, 0, sizeof(*evchap)); 3182 evchap->transport_handle = iscsi_handle(transport); 3183 evchap->type = nlh->nlmsg_type; 3184 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3185 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3186 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3187 buf = (char *)evchap + sizeof(*evchap); 3188 memset(buf, 0, chap_buf_size); 3189 3190 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3191 &evchap->u.get_chap.num_entries, buf); 3192 3193 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3194 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3195 nlhchap->nlmsg_len = actual_size; 3196 3197 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3198 GFP_KERNEL); 3199 } while (err < 0 && err != -ECONNREFUSED); 3200 3201 exit_get_chap: 3202 scsi_host_put(shost); 3203 return err; 3204 } 3205 3206 static int iscsi_set_chap(struct iscsi_transport *transport, 3207 struct iscsi_uevent *ev, uint32_t len) 3208 { 3209 char *data = (char *)ev + sizeof(*ev); 3210 struct Scsi_Host *shost; 3211 int err = 0; 3212 3213 if (!transport->set_chap) 3214 return -ENOSYS; 3215 3216 shost = scsi_host_lookup(ev->u.set_path.host_no); 3217 if (!shost) { 3218 pr_err("%s could not find host no %u\n", 3219 __func__, ev->u.set_path.host_no); 3220 return -ENODEV; 3221 } 3222 3223 err = transport->set_chap(shost, data, len); 3224 scsi_host_put(shost); 3225 return err; 3226 } 3227 3228 static int iscsi_delete_chap(struct iscsi_transport *transport, 3229 struct iscsi_uevent *ev) 3230 { 3231 struct Scsi_Host *shost; 3232 int err = 0; 3233 3234 if (!transport->delete_chap) 3235 return -ENOSYS; 3236 3237 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3238 if (!shost) { 3239 printk(KERN_ERR "%s could not find host no %u\n", 3240 __func__, ev->u.delete_chap.host_no); 3241 return -ENODEV; 3242 } 3243 3244 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3245 scsi_host_put(shost); 3246 return err; 3247 } 3248 3249 static const struct { 3250 enum iscsi_discovery_parent_type value; 3251 char *name; 3252 } iscsi_discovery_parent_names[] = { 3253 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3254 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3255 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3256 }; 3257 3258 char *iscsi_get_discovery_parent_name(int parent_type) 3259 { 3260 int i; 3261 char *state = "Unknown!"; 3262 3263 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3264 if (iscsi_discovery_parent_names[i].value & parent_type) { 3265 state = iscsi_discovery_parent_names[i].name; 3266 break; 3267 } 3268 } 3269 return state; 3270 } 3271 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3272 3273 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3274 struct iscsi_uevent *ev, uint32_t len) 3275 { 3276 char *data = (char *)ev + sizeof(*ev); 3277 struct Scsi_Host *shost; 3278 struct iscsi_bus_flash_session *fnode_sess; 3279 struct iscsi_bus_flash_conn *fnode_conn; 3280 struct device *dev; 3281 uint32_t idx; 3282 int err = 0; 3283 3284 if (!transport->set_flashnode_param) { 3285 err = -ENOSYS; 3286 goto exit_set_fnode; 3287 } 3288 3289 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3290 if (!shost) { 3291 pr_err("%s could not find host no %u\n", 3292 __func__, ev->u.set_flashnode.host_no); 3293 err = -ENODEV; 3294 goto put_host; 3295 } 3296 3297 idx = ev->u.set_flashnode.flashnode_idx; 3298 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3299 if (!fnode_sess) { 3300 pr_err("%s could not find flashnode %u for host no %u\n", 3301 __func__, idx, ev->u.set_flashnode.host_no); 3302 err = -ENODEV; 3303 goto put_host; 3304 } 3305 3306 dev = iscsi_find_flashnode_conn(fnode_sess); 3307 if (!dev) { 3308 err = -ENODEV; 3309 goto put_sess; 3310 } 3311 3312 fnode_conn = iscsi_dev_to_flash_conn(dev); 3313 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3314 put_device(dev); 3315 3316 put_sess: 3317 put_device(&fnode_sess->dev); 3318 3319 put_host: 3320 scsi_host_put(shost); 3321 3322 exit_set_fnode: 3323 return err; 3324 } 3325 3326 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3327 struct iscsi_uevent *ev, uint32_t len) 3328 { 3329 char *data = (char *)ev + sizeof(*ev); 3330 struct Scsi_Host *shost; 3331 int index; 3332 int err = 0; 3333 3334 if (!transport->new_flashnode) { 3335 err = -ENOSYS; 3336 goto exit_new_fnode; 3337 } 3338 3339 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3340 if (!shost) { 3341 pr_err("%s could not find host no %u\n", 3342 __func__, ev->u.new_flashnode.host_no); 3343 err = -ENODEV; 3344 goto put_host; 3345 } 3346 3347 index = transport->new_flashnode(shost, data, len); 3348 3349 if (index >= 0) 3350 ev->r.new_flashnode_ret.flashnode_idx = index; 3351 else 3352 err = -EIO; 3353 3354 put_host: 3355 scsi_host_put(shost); 3356 3357 exit_new_fnode: 3358 return err; 3359 } 3360 3361 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3362 struct iscsi_uevent *ev) 3363 { 3364 struct Scsi_Host *shost; 3365 struct iscsi_bus_flash_session *fnode_sess; 3366 uint32_t idx; 3367 int err = 0; 3368 3369 if (!transport->del_flashnode) { 3370 err = -ENOSYS; 3371 goto exit_del_fnode; 3372 } 3373 3374 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3375 if (!shost) { 3376 pr_err("%s could not find host no %u\n", 3377 __func__, ev->u.del_flashnode.host_no); 3378 err = -ENODEV; 3379 goto put_host; 3380 } 3381 3382 idx = ev->u.del_flashnode.flashnode_idx; 3383 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3384 if (!fnode_sess) { 3385 pr_err("%s could not find flashnode %u for host no %u\n", 3386 __func__, idx, ev->u.del_flashnode.host_no); 3387 err = -ENODEV; 3388 goto put_host; 3389 } 3390 3391 err = transport->del_flashnode(fnode_sess); 3392 put_device(&fnode_sess->dev); 3393 3394 put_host: 3395 scsi_host_put(shost); 3396 3397 exit_del_fnode: 3398 return err; 3399 } 3400 3401 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3402 struct iscsi_uevent *ev) 3403 { 3404 struct Scsi_Host *shost; 3405 struct iscsi_bus_flash_session *fnode_sess; 3406 struct iscsi_bus_flash_conn *fnode_conn; 3407 struct device *dev; 3408 uint32_t idx; 3409 int err = 0; 3410 3411 if (!transport->login_flashnode) { 3412 err = -ENOSYS; 3413 goto exit_login_fnode; 3414 } 3415 3416 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3417 if (!shost) { 3418 pr_err("%s could not find host no %u\n", 3419 __func__, ev->u.login_flashnode.host_no); 3420 err = -ENODEV; 3421 goto put_host; 3422 } 3423 3424 idx = ev->u.login_flashnode.flashnode_idx; 3425 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3426 if (!fnode_sess) { 3427 pr_err("%s could not find flashnode %u for host no %u\n", 3428 __func__, idx, ev->u.login_flashnode.host_no); 3429 err = -ENODEV; 3430 goto put_host; 3431 } 3432 3433 dev = iscsi_find_flashnode_conn(fnode_sess); 3434 if (!dev) { 3435 err = -ENODEV; 3436 goto put_sess; 3437 } 3438 3439 fnode_conn = iscsi_dev_to_flash_conn(dev); 3440 err = transport->login_flashnode(fnode_sess, fnode_conn); 3441 put_device(dev); 3442 3443 put_sess: 3444 put_device(&fnode_sess->dev); 3445 3446 put_host: 3447 scsi_host_put(shost); 3448 3449 exit_login_fnode: 3450 return err; 3451 } 3452 3453 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3454 struct iscsi_uevent *ev) 3455 { 3456 struct Scsi_Host *shost; 3457 struct iscsi_bus_flash_session *fnode_sess; 3458 struct iscsi_bus_flash_conn *fnode_conn; 3459 struct device *dev; 3460 uint32_t idx; 3461 int err = 0; 3462 3463 if (!transport->logout_flashnode) { 3464 err = -ENOSYS; 3465 goto exit_logout_fnode; 3466 } 3467 3468 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3469 if (!shost) { 3470 pr_err("%s could not find host no %u\n", 3471 __func__, ev->u.logout_flashnode.host_no); 3472 err = -ENODEV; 3473 goto put_host; 3474 } 3475 3476 idx = ev->u.logout_flashnode.flashnode_idx; 3477 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3478 if (!fnode_sess) { 3479 pr_err("%s could not find flashnode %u for host no %u\n", 3480 __func__, idx, ev->u.logout_flashnode.host_no); 3481 err = -ENODEV; 3482 goto put_host; 3483 } 3484 3485 dev = iscsi_find_flashnode_conn(fnode_sess); 3486 if (!dev) { 3487 err = -ENODEV; 3488 goto put_sess; 3489 } 3490 3491 fnode_conn = iscsi_dev_to_flash_conn(dev); 3492 3493 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3494 put_device(dev); 3495 3496 put_sess: 3497 put_device(&fnode_sess->dev); 3498 3499 put_host: 3500 scsi_host_put(shost); 3501 3502 exit_logout_fnode: 3503 return err; 3504 } 3505 3506 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3507 struct iscsi_uevent *ev) 3508 { 3509 struct Scsi_Host *shost; 3510 struct iscsi_cls_session *session; 3511 int err = 0; 3512 3513 if (!transport->logout_flashnode_sid) { 3514 err = -ENOSYS; 3515 goto exit_logout_sid; 3516 } 3517 3518 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3519 if (!shost) { 3520 pr_err("%s could not find host no %u\n", 3521 __func__, ev->u.logout_flashnode.host_no); 3522 err = -ENODEV; 3523 goto put_host; 3524 } 3525 3526 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3527 if (!session) { 3528 pr_err("%s could not find session id %u\n", 3529 __func__, ev->u.logout_flashnode_sid.sid); 3530 err = -EINVAL; 3531 goto put_host; 3532 } 3533 3534 err = transport->logout_flashnode_sid(session); 3535 3536 put_host: 3537 scsi_host_put(shost); 3538 3539 exit_logout_sid: 3540 return err; 3541 } 3542 3543 static int 3544 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3545 { 3546 struct iscsi_uevent *ev = nlmsg_data(nlh); 3547 struct Scsi_Host *shost = NULL; 3548 struct iscsi_internal *priv; 3549 struct sk_buff *skbhost_stats; 3550 struct nlmsghdr *nlhhost_stats; 3551 struct iscsi_uevent *evhost_stats; 3552 int host_stats_size = 0; 3553 int len, err = 0; 3554 char *buf; 3555 3556 if (!transport->get_host_stats) 3557 return -ENOSYS; 3558 3559 priv = iscsi_if_transport_lookup(transport); 3560 if (!priv) 3561 return -EINVAL; 3562 3563 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3564 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3565 3566 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3567 if (!shost) { 3568 pr_err("%s: failed. Could not find host no %u\n", 3569 __func__, ev->u.get_host_stats.host_no); 3570 return -ENODEV; 3571 } 3572 3573 do { 3574 int actual_size; 3575 3576 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3577 if (!skbhost_stats) { 3578 pr_err("cannot deliver host stats: OOM\n"); 3579 err = -ENOMEM; 3580 goto exit_host_stats; 3581 } 3582 3583 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3584 (len - sizeof(*nlhhost_stats)), 0); 3585 evhost_stats = nlmsg_data(nlhhost_stats); 3586 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3587 evhost_stats->transport_handle = iscsi_handle(transport); 3588 evhost_stats->type = nlh->nlmsg_type; 3589 evhost_stats->u.get_host_stats.host_no = 3590 ev->u.get_host_stats.host_no; 3591 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3592 memset(buf, 0, host_stats_size); 3593 3594 err = transport->get_host_stats(shost, buf, host_stats_size); 3595 if (err) { 3596 kfree_skb(skbhost_stats); 3597 goto exit_host_stats; 3598 } 3599 3600 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3601 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3602 nlhhost_stats->nlmsg_len = actual_size; 3603 3604 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3605 GFP_KERNEL); 3606 } while (err < 0 && err != -ECONNREFUSED); 3607 3608 exit_host_stats: 3609 scsi_host_put(shost); 3610 return err; 3611 } 3612 3613 3614 static int 3615 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3616 { 3617 int err = 0; 3618 u32 portid; 3619 struct iscsi_uevent *ev = nlmsg_data(nlh); 3620 struct iscsi_transport *transport = NULL; 3621 struct iscsi_internal *priv; 3622 struct iscsi_cls_session *session; 3623 struct iscsi_cls_conn *conn; 3624 struct iscsi_endpoint *ep = NULL; 3625 3626 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3627 *group = ISCSI_NL_GRP_UIP; 3628 else 3629 *group = ISCSI_NL_GRP_ISCSID; 3630 3631 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3632 if (!priv) 3633 return -EINVAL; 3634 transport = priv->iscsi_transport; 3635 3636 if (!try_module_get(transport->owner)) 3637 return -EINVAL; 3638 3639 portid = NETLINK_CB(skb).portid; 3640 3641 switch (nlh->nlmsg_type) { 3642 case ISCSI_UEVENT_CREATE_SESSION: 3643 err = iscsi_if_create_session(priv, ep, ev, 3644 portid, 3645 ev->u.c_session.initial_cmdsn, 3646 ev->u.c_session.cmds_max, 3647 ev->u.c_session.queue_depth); 3648 break; 3649 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3650 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3651 if (!ep) { 3652 err = -EINVAL; 3653 break; 3654 } 3655 3656 err = iscsi_if_create_session(priv, ep, ev, 3657 portid, 3658 ev->u.c_bound_session.initial_cmdsn, 3659 ev->u.c_bound_session.cmds_max, 3660 ev->u.c_bound_session.queue_depth); 3661 break; 3662 case ISCSI_UEVENT_DESTROY_SESSION: 3663 session = iscsi_session_lookup(ev->u.d_session.sid); 3664 if (!session) 3665 err = -EINVAL; 3666 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3667 err = -EBUSY; 3668 else 3669 transport->destroy_session(session); 3670 break; 3671 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3672 session = iscsi_session_lookup(ev->u.d_session.sid); 3673 if (!session) 3674 err = -EINVAL; 3675 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3676 err = -EBUSY; 3677 else { 3678 unsigned long flags; 3679 3680 /* Prevent this session from being found again */ 3681 spin_lock_irqsave(&sesslock, flags); 3682 list_move(&session->sess_list, &sessdestroylist); 3683 spin_unlock_irqrestore(&sesslock, flags); 3684 3685 queue_work(iscsi_destroy_workq, &session->destroy_work); 3686 } 3687 break; 3688 case ISCSI_UEVENT_UNBIND_SESSION: 3689 session = iscsi_session_lookup(ev->u.d_session.sid); 3690 if (session) 3691 scsi_queue_work(iscsi_session_to_shost(session), 3692 &session->unbind_work); 3693 else 3694 err = -EINVAL; 3695 break; 3696 case ISCSI_UEVENT_CREATE_CONN: 3697 err = iscsi_if_create_conn(transport, ev); 3698 break; 3699 case ISCSI_UEVENT_DESTROY_CONN: 3700 err = iscsi_if_destroy_conn(transport, ev); 3701 break; 3702 case ISCSI_UEVENT_BIND_CONN: 3703 session = iscsi_session_lookup(ev->u.b_conn.sid); 3704 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3705 3706 if (conn && conn->ep) 3707 iscsi_if_ep_disconnect(transport, conn->ep->id); 3708 3709 if (!session || !conn) { 3710 err = -EINVAL; 3711 break; 3712 } 3713 3714 mutex_lock(&conn_mutex); 3715 ev->r.retcode = transport->bind_conn(session, conn, 3716 ev->u.b_conn.transport_eph, 3717 ev->u.b_conn.is_leading); 3718 mutex_unlock(&conn_mutex); 3719 3720 if (ev->r.retcode || !transport->ep_connect) 3721 break; 3722 3723 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3724 if (ep) { 3725 ep->conn = conn; 3726 3727 mutex_lock(&conn->ep_mutex); 3728 conn->ep = ep; 3729 mutex_unlock(&conn->ep_mutex); 3730 } else 3731 iscsi_cls_conn_printk(KERN_ERR, conn, 3732 "Could not set ep conn " 3733 "binding\n"); 3734 break; 3735 case ISCSI_UEVENT_SET_PARAM: 3736 err = iscsi_set_param(transport, ev); 3737 break; 3738 case ISCSI_UEVENT_START_CONN: 3739 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3740 if (conn) { 3741 mutex_lock(&conn_mutex); 3742 ev->r.retcode = transport->start_conn(conn); 3743 if (!ev->r.retcode) 3744 conn->state = ISCSI_CONN_UP; 3745 mutex_unlock(&conn_mutex); 3746 } 3747 else 3748 err = -EINVAL; 3749 break; 3750 case ISCSI_UEVENT_STOP_CONN: 3751 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3752 if (conn) 3753 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3754 else 3755 err = -EINVAL; 3756 break; 3757 case ISCSI_UEVENT_SEND_PDU: 3758 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3759 if (conn) { 3760 mutex_lock(&conn_mutex); 3761 ev->r.retcode = transport->send_pdu(conn, 3762 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3763 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3764 ev->u.send_pdu.data_size); 3765 mutex_unlock(&conn_mutex); 3766 } 3767 else 3768 err = -EINVAL; 3769 break; 3770 case ISCSI_UEVENT_GET_STATS: 3771 err = iscsi_if_get_stats(transport, nlh); 3772 break; 3773 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3774 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3775 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3776 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3777 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3778 break; 3779 case ISCSI_UEVENT_TGT_DSCVR: 3780 err = iscsi_tgt_dscvr(transport, ev); 3781 break; 3782 case ISCSI_UEVENT_SET_HOST_PARAM: 3783 err = iscsi_set_host_param(transport, ev); 3784 break; 3785 case ISCSI_UEVENT_PATH_UPDATE: 3786 err = iscsi_set_path(transport, ev); 3787 break; 3788 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3789 err = iscsi_set_iface_params(transport, ev, 3790 nlmsg_attrlen(nlh, sizeof(*ev))); 3791 break; 3792 case ISCSI_UEVENT_PING: 3793 err = iscsi_send_ping(transport, ev); 3794 break; 3795 case ISCSI_UEVENT_GET_CHAP: 3796 err = iscsi_get_chap(transport, nlh); 3797 break; 3798 case ISCSI_UEVENT_DELETE_CHAP: 3799 err = iscsi_delete_chap(transport, ev); 3800 break; 3801 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3802 err = iscsi_set_flashnode_param(transport, ev, 3803 nlmsg_attrlen(nlh, 3804 sizeof(*ev))); 3805 break; 3806 case ISCSI_UEVENT_NEW_FLASHNODE: 3807 err = iscsi_new_flashnode(transport, ev, 3808 nlmsg_attrlen(nlh, sizeof(*ev))); 3809 break; 3810 case ISCSI_UEVENT_DEL_FLASHNODE: 3811 err = iscsi_del_flashnode(transport, ev); 3812 break; 3813 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3814 err = iscsi_login_flashnode(transport, ev); 3815 break; 3816 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3817 err = iscsi_logout_flashnode(transport, ev); 3818 break; 3819 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3820 err = iscsi_logout_flashnode_sid(transport, ev); 3821 break; 3822 case ISCSI_UEVENT_SET_CHAP: 3823 err = iscsi_set_chap(transport, ev, 3824 nlmsg_attrlen(nlh, sizeof(*ev))); 3825 break; 3826 case ISCSI_UEVENT_GET_HOST_STATS: 3827 err = iscsi_get_host_stats(transport, nlh); 3828 break; 3829 default: 3830 err = -ENOSYS; 3831 break; 3832 } 3833 3834 module_put(transport->owner); 3835 return err; 3836 } 3837 3838 /* 3839 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3840 * Malformed skbs with wrong lengths or invalid creds are not processed. 3841 */ 3842 static void 3843 iscsi_if_rx(struct sk_buff *skb) 3844 { 3845 u32 portid = NETLINK_CB(skb).portid; 3846 3847 mutex_lock(&rx_queue_mutex); 3848 while (skb->len >= NLMSG_HDRLEN) { 3849 int err; 3850 uint32_t rlen; 3851 struct nlmsghdr *nlh; 3852 struct iscsi_uevent *ev; 3853 uint32_t group; 3854 int retries = ISCSI_SEND_MAX_ALLOWED; 3855 3856 nlh = nlmsg_hdr(skb); 3857 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3858 skb->len < nlh->nlmsg_len) { 3859 break; 3860 } 3861 3862 ev = nlmsg_data(nlh); 3863 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3864 if (rlen > skb->len) 3865 rlen = skb->len; 3866 3867 err = iscsi_if_recv_msg(skb, nlh, &group); 3868 if (err) { 3869 ev->type = ISCSI_KEVENT_IF_ERROR; 3870 ev->iferror = err; 3871 } 3872 do { 3873 /* 3874 * special case for GET_STATS: 3875 * on success - sending reply and stats from 3876 * inside of if_recv_msg(), 3877 * on error - fall through. 3878 */ 3879 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3880 break; 3881 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3882 break; 3883 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3884 ev, sizeof(*ev)); 3885 if (err == -EAGAIN && --retries < 0) { 3886 printk(KERN_WARNING "Send reply failed, error %d\n", err); 3887 break; 3888 } 3889 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3890 skb_pull(skb, rlen); 3891 } 3892 mutex_unlock(&rx_queue_mutex); 3893 } 3894 3895 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3896 struct device_attribute dev_attr_##_prefix##_##_name = \ 3897 __ATTR(_name,_mode,_show,_store) 3898 3899 /* 3900 * iSCSI connection attrs 3901 */ 3902 #define iscsi_conn_attr_show(param) \ 3903 static ssize_t \ 3904 show_conn_param_##param(struct device *dev, \ 3905 struct device_attribute *attr, char *buf) \ 3906 { \ 3907 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3908 struct iscsi_transport *t = conn->transport; \ 3909 return t->get_conn_param(conn, param, buf); \ 3910 } 3911 3912 #define iscsi_conn_attr(field, param) \ 3913 iscsi_conn_attr_show(param) \ 3914 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3915 NULL); 3916 3917 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3918 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3919 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3920 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3921 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3922 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3923 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3924 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3925 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3926 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3927 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3928 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3929 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3930 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3931 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3932 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3933 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3934 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3935 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3936 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3937 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3938 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3939 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3940 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3941 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3942 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3943 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3944 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3945 3946 static const char *const connection_state_names[] = { 3947 [ISCSI_CONN_UP] = "up", 3948 [ISCSI_CONN_DOWN] = "down", 3949 [ISCSI_CONN_FAILED] = "failed" 3950 }; 3951 3952 static ssize_t show_conn_state(struct device *dev, 3953 struct device_attribute *attr, char *buf) 3954 { 3955 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 3956 const char *state = "unknown"; 3957 3958 if (conn->state >= 0 && 3959 conn->state < ARRAY_SIZE(connection_state_names)) 3960 state = connection_state_names[conn->state]; 3961 3962 return sprintf(buf, "%s\n", state); 3963 } 3964 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 3965 NULL); 3966 3967 #define iscsi_conn_ep_attr_show(param) \ 3968 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 3969 struct device_attribute *attr,\ 3970 char *buf) \ 3971 { \ 3972 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3973 struct iscsi_transport *t = conn->transport; \ 3974 struct iscsi_endpoint *ep; \ 3975 ssize_t rc; \ 3976 \ 3977 /* \ 3978 * Need to make sure ep_disconnect does not free the LLD's \ 3979 * interconnect resources while we are trying to read them. \ 3980 */ \ 3981 mutex_lock(&conn->ep_mutex); \ 3982 ep = conn->ep; \ 3983 if (!ep && t->ep_connect) { \ 3984 mutex_unlock(&conn->ep_mutex); \ 3985 return -ENOTCONN; \ 3986 } \ 3987 \ 3988 if (ep) \ 3989 rc = t->get_ep_param(ep, param, buf); \ 3990 else \ 3991 rc = t->get_conn_param(conn, param, buf); \ 3992 mutex_unlock(&conn->ep_mutex); \ 3993 return rc; \ 3994 } 3995 3996 #define iscsi_conn_ep_attr(field, param) \ 3997 iscsi_conn_ep_attr_show(param) \ 3998 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 3999 show_conn_ep_param_##param, NULL); 4000 4001 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4002 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4003 4004 static struct attribute *iscsi_conn_attrs[] = { 4005 &dev_attr_conn_max_recv_dlength.attr, 4006 &dev_attr_conn_max_xmit_dlength.attr, 4007 &dev_attr_conn_header_digest.attr, 4008 &dev_attr_conn_data_digest.attr, 4009 &dev_attr_conn_ifmarker.attr, 4010 &dev_attr_conn_ofmarker.attr, 4011 &dev_attr_conn_address.attr, 4012 &dev_attr_conn_port.attr, 4013 &dev_attr_conn_exp_statsn.attr, 4014 &dev_attr_conn_persistent_address.attr, 4015 &dev_attr_conn_persistent_port.attr, 4016 &dev_attr_conn_ping_tmo.attr, 4017 &dev_attr_conn_recv_tmo.attr, 4018 &dev_attr_conn_local_port.attr, 4019 &dev_attr_conn_statsn.attr, 4020 &dev_attr_conn_keepalive_tmo.attr, 4021 &dev_attr_conn_max_segment_size.attr, 4022 &dev_attr_conn_tcp_timestamp_stat.attr, 4023 &dev_attr_conn_tcp_wsf_disable.attr, 4024 &dev_attr_conn_tcp_nagle_disable.attr, 4025 &dev_attr_conn_tcp_timer_scale.attr, 4026 &dev_attr_conn_tcp_timestamp_enable.attr, 4027 &dev_attr_conn_fragment_disable.attr, 4028 &dev_attr_conn_ipv4_tos.attr, 4029 &dev_attr_conn_ipv6_traffic_class.attr, 4030 &dev_attr_conn_ipv6_flow_label.attr, 4031 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4032 &dev_attr_conn_tcp_xmit_wsf.attr, 4033 &dev_attr_conn_tcp_recv_wsf.attr, 4034 &dev_attr_conn_local_ipaddr.attr, 4035 &dev_attr_conn_state.attr, 4036 NULL, 4037 }; 4038 4039 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4040 struct attribute *attr, int i) 4041 { 4042 struct device *cdev = container_of(kobj, struct device, kobj); 4043 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4044 struct iscsi_transport *t = conn->transport; 4045 int param; 4046 4047 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4048 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4049 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4050 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4051 else if (attr == &dev_attr_conn_header_digest.attr) 4052 param = ISCSI_PARAM_HDRDGST_EN; 4053 else if (attr == &dev_attr_conn_data_digest.attr) 4054 param = ISCSI_PARAM_DATADGST_EN; 4055 else if (attr == &dev_attr_conn_ifmarker.attr) 4056 param = ISCSI_PARAM_IFMARKER_EN; 4057 else if (attr == &dev_attr_conn_ofmarker.attr) 4058 param = ISCSI_PARAM_OFMARKER_EN; 4059 else if (attr == &dev_attr_conn_address.attr) 4060 param = ISCSI_PARAM_CONN_ADDRESS; 4061 else if (attr == &dev_attr_conn_port.attr) 4062 param = ISCSI_PARAM_CONN_PORT; 4063 else if (attr == &dev_attr_conn_exp_statsn.attr) 4064 param = ISCSI_PARAM_EXP_STATSN; 4065 else if (attr == &dev_attr_conn_persistent_address.attr) 4066 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4067 else if (attr == &dev_attr_conn_persistent_port.attr) 4068 param = ISCSI_PARAM_PERSISTENT_PORT; 4069 else if (attr == &dev_attr_conn_ping_tmo.attr) 4070 param = ISCSI_PARAM_PING_TMO; 4071 else if (attr == &dev_attr_conn_recv_tmo.attr) 4072 param = ISCSI_PARAM_RECV_TMO; 4073 else if (attr == &dev_attr_conn_local_port.attr) 4074 param = ISCSI_PARAM_LOCAL_PORT; 4075 else if (attr == &dev_attr_conn_statsn.attr) 4076 param = ISCSI_PARAM_STATSN; 4077 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4078 param = ISCSI_PARAM_KEEPALIVE_TMO; 4079 else if (attr == &dev_attr_conn_max_segment_size.attr) 4080 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4081 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4082 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4083 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4084 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4085 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4086 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4087 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4088 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4089 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4090 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4091 else if (attr == &dev_attr_conn_fragment_disable.attr) 4092 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4093 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4094 param = ISCSI_PARAM_IPV4_TOS; 4095 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4096 param = ISCSI_PARAM_IPV6_TC; 4097 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4098 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4099 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4100 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4101 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4102 param = ISCSI_PARAM_TCP_XMIT_WSF; 4103 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4104 param = ISCSI_PARAM_TCP_RECV_WSF; 4105 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4106 param = ISCSI_PARAM_LOCAL_IPADDR; 4107 else if (attr == &dev_attr_conn_state.attr) 4108 return S_IRUGO; 4109 else { 4110 WARN_ONCE(1, "Invalid conn attr"); 4111 return 0; 4112 } 4113 4114 return t->attr_is_visible(ISCSI_PARAM, param); 4115 } 4116 4117 static struct attribute_group iscsi_conn_group = { 4118 .attrs = iscsi_conn_attrs, 4119 .is_visible = iscsi_conn_attr_is_visible, 4120 }; 4121 4122 /* 4123 * iSCSI session attrs 4124 */ 4125 #define iscsi_session_attr_show(param, perm) \ 4126 static ssize_t \ 4127 show_session_param_##param(struct device *dev, \ 4128 struct device_attribute *attr, char *buf) \ 4129 { \ 4130 struct iscsi_cls_session *session = \ 4131 iscsi_dev_to_session(dev->parent); \ 4132 struct iscsi_transport *t = session->transport; \ 4133 \ 4134 if (perm && !capable(CAP_SYS_ADMIN)) \ 4135 return -EACCES; \ 4136 return t->get_session_param(session, param, buf); \ 4137 } 4138 4139 #define iscsi_session_attr(field, param, perm) \ 4140 iscsi_session_attr_show(param, perm) \ 4141 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4142 NULL); 4143 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4144 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4145 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4146 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4147 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4148 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4149 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4150 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4151 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4152 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4153 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4154 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4155 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4156 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4157 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4158 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4159 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4160 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4161 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4162 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4163 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4164 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4165 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4166 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4167 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4168 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4169 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4170 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4171 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4172 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4173 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4174 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4175 iscsi_session_attr(discovery_auth_optional, 4176 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4177 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4178 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4179 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4180 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4181 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4182 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4183 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4184 4185 static ssize_t 4186 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4187 char *buf) 4188 { 4189 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4190 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); 4191 } 4192 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4193 NULL); 4194 static ssize_t 4195 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4196 char *buf) 4197 { 4198 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4199 return sprintf(buf, "%d\n", session->creator); 4200 } 4201 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4202 NULL); 4203 static ssize_t 4204 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4205 char *buf) 4206 { 4207 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4208 return sprintf(buf, "%d\n", session->target_id); 4209 } 4210 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4211 show_priv_session_target_id, NULL); 4212 4213 #define iscsi_priv_session_attr_show(field, format) \ 4214 static ssize_t \ 4215 show_priv_session_##field(struct device *dev, \ 4216 struct device_attribute *attr, char *buf) \ 4217 { \ 4218 struct iscsi_cls_session *session = \ 4219 iscsi_dev_to_session(dev->parent); \ 4220 if (session->field == -1) \ 4221 return sprintf(buf, "off\n"); \ 4222 return sprintf(buf, format"\n", session->field); \ 4223 } 4224 4225 #define iscsi_priv_session_attr_store(field) \ 4226 static ssize_t \ 4227 store_priv_session_##field(struct device *dev, \ 4228 struct device_attribute *attr, \ 4229 const char *buf, size_t count) \ 4230 { \ 4231 int val; \ 4232 char *cp; \ 4233 struct iscsi_cls_session *session = \ 4234 iscsi_dev_to_session(dev->parent); \ 4235 if ((session->state == ISCSI_SESSION_FREE) || \ 4236 (session->state == ISCSI_SESSION_FAILED)) \ 4237 return -EBUSY; \ 4238 if (strncmp(buf, "off", 3) == 0) { \ 4239 session->field = -1; \ 4240 session->field##_sysfs_override = true; \ 4241 } else { \ 4242 val = simple_strtoul(buf, &cp, 0); \ 4243 if (*cp != '\0' && *cp != '\n') \ 4244 return -EINVAL; \ 4245 session->field = val; \ 4246 session->field##_sysfs_override = true; \ 4247 } \ 4248 return count; \ 4249 } 4250 4251 #define iscsi_priv_session_rw_attr(field, format) \ 4252 iscsi_priv_session_attr_show(field, format) \ 4253 iscsi_priv_session_attr_store(field) \ 4254 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4255 show_priv_session_##field, \ 4256 store_priv_session_##field) 4257 4258 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4259 4260 static struct attribute *iscsi_session_attrs[] = { 4261 &dev_attr_sess_initial_r2t.attr, 4262 &dev_attr_sess_max_outstanding_r2t.attr, 4263 &dev_attr_sess_immediate_data.attr, 4264 &dev_attr_sess_first_burst_len.attr, 4265 &dev_attr_sess_max_burst_len.attr, 4266 &dev_attr_sess_data_pdu_in_order.attr, 4267 &dev_attr_sess_data_seq_in_order.attr, 4268 &dev_attr_sess_erl.attr, 4269 &dev_attr_sess_targetname.attr, 4270 &dev_attr_sess_tpgt.attr, 4271 &dev_attr_sess_password.attr, 4272 &dev_attr_sess_password_in.attr, 4273 &dev_attr_sess_username.attr, 4274 &dev_attr_sess_username_in.attr, 4275 &dev_attr_sess_fast_abort.attr, 4276 &dev_attr_sess_abort_tmo.attr, 4277 &dev_attr_sess_lu_reset_tmo.attr, 4278 &dev_attr_sess_tgt_reset_tmo.attr, 4279 &dev_attr_sess_ifacename.attr, 4280 &dev_attr_sess_initiatorname.attr, 4281 &dev_attr_sess_targetalias.attr, 4282 &dev_attr_sess_boot_root.attr, 4283 &dev_attr_sess_boot_nic.attr, 4284 &dev_attr_sess_boot_target.attr, 4285 &dev_attr_priv_sess_recovery_tmo.attr, 4286 &dev_attr_priv_sess_state.attr, 4287 &dev_attr_priv_sess_creator.attr, 4288 &dev_attr_sess_chap_out_idx.attr, 4289 &dev_attr_sess_chap_in_idx.attr, 4290 &dev_attr_priv_sess_target_id.attr, 4291 &dev_attr_sess_auto_snd_tgt_disable.attr, 4292 &dev_attr_sess_discovery_session.attr, 4293 &dev_attr_sess_portal_type.attr, 4294 &dev_attr_sess_chap_auth.attr, 4295 &dev_attr_sess_discovery_logout.attr, 4296 &dev_attr_sess_bidi_chap.attr, 4297 &dev_attr_sess_discovery_auth_optional.attr, 4298 &dev_attr_sess_def_time2wait.attr, 4299 &dev_attr_sess_def_time2retain.attr, 4300 &dev_attr_sess_isid.attr, 4301 &dev_attr_sess_tsid.attr, 4302 &dev_attr_sess_def_taskmgmt_tmo.attr, 4303 &dev_attr_sess_discovery_parent_idx.attr, 4304 &dev_attr_sess_discovery_parent_type.attr, 4305 NULL, 4306 }; 4307 4308 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4309 struct attribute *attr, int i) 4310 { 4311 struct device *cdev = container_of(kobj, struct device, kobj); 4312 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4313 struct iscsi_transport *t = session->transport; 4314 int param; 4315 4316 if (attr == &dev_attr_sess_initial_r2t.attr) 4317 param = ISCSI_PARAM_INITIAL_R2T_EN; 4318 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4319 param = ISCSI_PARAM_MAX_R2T; 4320 else if (attr == &dev_attr_sess_immediate_data.attr) 4321 param = ISCSI_PARAM_IMM_DATA_EN; 4322 else if (attr == &dev_attr_sess_first_burst_len.attr) 4323 param = ISCSI_PARAM_FIRST_BURST; 4324 else if (attr == &dev_attr_sess_max_burst_len.attr) 4325 param = ISCSI_PARAM_MAX_BURST; 4326 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4327 param = ISCSI_PARAM_PDU_INORDER_EN; 4328 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4329 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4330 else if (attr == &dev_attr_sess_erl.attr) 4331 param = ISCSI_PARAM_ERL; 4332 else if (attr == &dev_attr_sess_targetname.attr) 4333 param = ISCSI_PARAM_TARGET_NAME; 4334 else if (attr == &dev_attr_sess_tpgt.attr) 4335 param = ISCSI_PARAM_TPGT; 4336 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4337 param = ISCSI_PARAM_CHAP_IN_IDX; 4338 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4339 param = ISCSI_PARAM_CHAP_OUT_IDX; 4340 else if (attr == &dev_attr_sess_password.attr) 4341 param = ISCSI_PARAM_USERNAME; 4342 else if (attr == &dev_attr_sess_password_in.attr) 4343 param = ISCSI_PARAM_USERNAME_IN; 4344 else if (attr == &dev_attr_sess_username.attr) 4345 param = ISCSI_PARAM_PASSWORD; 4346 else if (attr == &dev_attr_sess_username_in.attr) 4347 param = ISCSI_PARAM_PASSWORD_IN; 4348 else if (attr == &dev_attr_sess_fast_abort.attr) 4349 param = ISCSI_PARAM_FAST_ABORT; 4350 else if (attr == &dev_attr_sess_abort_tmo.attr) 4351 param = ISCSI_PARAM_ABORT_TMO; 4352 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4353 param = ISCSI_PARAM_LU_RESET_TMO; 4354 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4355 param = ISCSI_PARAM_TGT_RESET_TMO; 4356 else if (attr == &dev_attr_sess_ifacename.attr) 4357 param = ISCSI_PARAM_IFACE_NAME; 4358 else if (attr == &dev_attr_sess_initiatorname.attr) 4359 param = ISCSI_PARAM_INITIATOR_NAME; 4360 else if (attr == &dev_attr_sess_targetalias.attr) 4361 param = ISCSI_PARAM_TARGET_ALIAS; 4362 else if (attr == &dev_attr_sess_boot_root.attr) 4363 param = ISCSI_PARAM_BOOT_ROOT; 4364 else if (attr == &dev_attr_sess_boot_nic.attr) 4365 param = ISCSI_PARAM_BOOT_NIC; 4366 else if (attr == &dev_attr_sess_boot_target.attr) 4367 param = ISCSI_PARAM_BOOT_TARGET; 4368 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4369 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4370 else if (attr == &dev_attr_sess_discovery_session.attr) 4371 param = ISCSI_PARAM_DISCOVERY_SESS; 4372 else if (attr == &dev_attr_sess_portal_type.attr) 4373 param = ISCSI_PARAM_PORTAL_TYPE; 4374 else if (attr == &dev_attr_sess_chap_auth.attr) 4375 param = ISCSI_PARAM_CHAP_AUTH_EN; 4376 else if (attr == &dev_attr_sess_discovery_logout.attr) 4377 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4378 else if (attr == &dev_attr_sess_bidi_chap.attr) 4379 param = ISCSI_PARAM_BIDI_CHAP_EN; 4380 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4381 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4382 else if (attr == &dev_attr_sess_def_time2wait.attr) 4383 param = ISCSI_PARAM_DEF_TIME2WAIT; 4384 else if (attr == &dev_attr_sess_def_time2retain.attr) 4385 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4386 else if (attr == &dev_attr_sess_isid.attr) 4387 param = ISCSI_PARAM_ISID; 4388 else if (attr == &dev_attr_sess_tsid.attr) 4389 param = ISCSI_PARAM_TSID; 4390 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4391 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4392 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4393 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4394 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4395 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4396 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4397 return S_IRUGO | S_IWUSR; 4398 else if (attr == &dev_attr_priv_sess_state.attr) 4399 return S_IRUGO; 4400 else if (attr == &dev_attr_priv_sess_creator.attr) 4401 return S_IRUGO; 4402 else if (attr == &dev_attr_priv_sess_target_id.attr) 4403 return S_IRUGO; 4404 else { 4405 WARN_ONCE(1, "Invalid session attr"); 4406 return 0; 4407 } 4408 4409 return t->attr_is_visible(ISCSI_PARAM, param); 4410 } 4411 4412 static struct attribute_group iscsi_session_group = { 4413 .attrs = iscsi_session_attrs, 4414 .is_visible = iscsi_session_attr_is_visible, 4415 }; 4416 4417 /* 4418 * iSCSI host attrs 4419 */ 4420 #define iscsi_host_attr_show(param) \ 4421 static ssize_t \ 4422 show_host_param_##param(struct device *dev, \ 4423 struct device_attribute *attr, char *buf) \ 4424 { \ 4425 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4426 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4427 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4428 } 4429 4430 #define iscsi_host_attr(field, param) \ 4431 iscsi_host_attr_show(param) \ 4432 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4433 NULL); 4434 4435 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4436 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4437 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4438 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4439 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4440 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4441 4442 static struct attribute *iscsi_host_attrs[] = { 4443 &dev_attr_host_netdev.attr, 4444 &dev_attr_host_hwaddress.attr, 4445 &dev_attr_host_ipaddress.attr, 4446 &dev_attr_host_initiatorname.attr, 4447 &dev_attr_host_port_state.attr, 4448 &dev_attr_host_port_speed.attr, 4449 NULL, 4450 }; 4451 4452 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4453 struct attribute *attr, int i) 4454 { 4455 struct device *cdev = container_of(kobj, struct device, kobj); 4456 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4457 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4458 int param; 4459 4460 if (attr == &dev_attr_host_netdev.attr) 4461 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4462 else if (attr == &dev_attr_host_hwaddress.attr) 4463 param = ISCSI_HOST_PARAM_HWADDRESS; 4464 else if (attr == &dev_attr_host_ipaddress.attr) 4465 param = ISCSI_HOST_PARAM_IPADDRESS; 4466 else if (attr == &dev_attr_host_initiatorname.attr) 4467 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4468 else if (attr == &dev_attr_host_port_state.attr) 4469 param = ISCSI_HOST_PARAM_PORT_STATE; 4470 else if (attr == &dev_attr_host_port_speed.attr) 4471 param = ISCSI_HOST_PARAM_PORT_SPEED; 4472 else { 4473 WARN_ONCE(1, "Invalid host attr"); 4474 return 0; 4475 } 4476 4477 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4478 } 4479 4480 static struct attribute_group iscsi_host_group = { 4481 .attrs = iscsi_host_attrs, 4482 .is_visible = iscsi_host_attr_is_visible, 4483 }; 4484 4485 /* convert iscsi_port_speed values to ascii string name */ 4486 static const struct { 4487 enum iscsi_port_speed value; 4488 char *name; 4489 } iscsi_port_speed_names[] = { 4490 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4491 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4492 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4493 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4494 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4495 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4496 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4497 }; 4498 4499 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4500 { 4501 int i; 4502 char *speed = "Unknown!"; 4503 struct iscsi_cls_host *ihost = shost->shost_data; 4504 uint32_t port_speed = ihost->port_speed; 4505 4506 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4507 if (iscsi_port_speed_names[i].value & port_speed) { 4508 speed = iscsi_port_speed_names[i].name; 4509 break; 4510 } 4511 } 4512 return speed; 4513 } 4514 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4515 4516 /* convert iscsi_port_state values to ascii string name */ 4517 static const struct { 4518 enum iscsi_port_state value; 4519 char *name; 4520 } iscsi_port_state_names[] = { 4521 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4522 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4523 }; 4524 4525 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4526 { 4527 int i; 4528 char *state = "Unknown!"; 4529 struct iscsi_cls_host *ihost = shost->shost_data; 4530 uint32_t port_state = ihost->port_state; 4531 4532 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4533 if (iscsi_port_state_names[i].value & port_state) { 4534 state = iscsi_port_state_names[i].name; 4535 break; 4536 } 4537 } 4538 return state; 4539 } 4540 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4541 4542 static int iscsi_session_match(struct attribute_container *cont, 4543 struct device *dev) 4544 { 4545 struct iscsi_cls_session *session; 4546 struct Scsi_Host *shost; 4547 struct iscsi_internal *priv; 4548 4549 if (!iscsi_is_session_dev(dev)) 4550 return 0; 4551 4552 session = iscsi_dev_to_session(dev); 4553 shost = iscsi_session_to_shost(session); 4554 if (!shost->transportt) 4555 return 0; 4556 4557 priv = to_iscsi_internal(shost->transportt); 4558 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4559 return 0; 4560 4561 return &priv->session_cont.ac == cont; 4562 } 4563 4564 static int iscsi_conn_match(struct attribute_container *cont, 4565 struct device *dev) 4566 { 4567 struct iscsi_cls_session *session; 4568 struct iscsi_cls_conn *conn; 4569 struct Scsi_Host *shost; 4570 struct iscsi_internal *priv; 4571 4572 if (!iscsi_is_conn_dev(dev)) 4573 return 0; 4574 4575 conn = iscsi_dev_to_conn(dev); 4576 session = iscsi_dev_to_session(conn->dev.parent); 4577 shost = iscsi_session_to_shost(session); 4578 4579 if (!shost->transportt) 4580 return 0; 4581 4582 priv = to_iscsi_internal(shost->transportt); 4583 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4584 return 0; 4585 4586 return &priv->conn_cont.ac == cont; 4587 } 4588 4589 static int iscsi_host_match(struct attribute_container *cont, 4590 struct device *dev) 4591 { 4592 struct Scsi_Host *shost; 4593 struct iscsi_internal *priv; 4594 4595 if (!scsi_is_host_device(dev)) 4596 return 0; 4597 4598 shost = dev_to_shost(dev); 4599 if (!shost->transportt || 4600 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4601 return 0; 4602 4603 priv = to_iscsi_internal(shost->transportt); 4604 return &priv->t.host_attrs.ac == cont; 4605 } 4606 4607 struct scsi_transport_template * 4608 iscsi_register_transport(struct iscsi_transport *tt) 4609 { 4610 struct iscsi_internal *priv; 4611 unsigned long flags; 4612 int err; 4613 4614 BUG_ON(!tt); 4615 4616 priv = iscsi_if_transport_lookup(tt); 4617 if (priv) 4618 return NULL; 4619 4620 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4621 if (!priv) 4622 return NULL; 4623 INIT_LIST_HEAD(&priv->list); 4624 priv->iscsi_transport = tt; 4625 priv->t.user_scan = iscsi_user_scan; 4626 priv->t.create_work_queue = 1; 4627 4628 priv->dev.class = &iscsi_transport_class; 4629 dev_set_name(&priv->dev, "%s", tt->name); 4630 err = device_register(&priv->dev); 4631 if (err) 4632 goto free_priv; 4633 4634 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4635 if (err) 4636 goto unregister_dev; 4637 4638 /* host parameters */ 4639 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4640 priv->t.host_attrs.ac.match = iscsi_host_match; 4641 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4642 priv->t.host_size = sizeof(struct iscsi_cls_host); 4643 transport_container_register(&priv->t.host_attrs); 4644 4645 /* connection parameters */ 4646 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4647 priv->conn_cont.ac.match = iscsi_conn_match; 4648 priv->conn_cont.ac.grp = &iscsi_conn_group; 4649 transport_container_register(&priv->conn_cont); 4650 4651 /* session parameters */ 4652 priv->session_cont.ac.class = &iscsi_session_class.class; 4653 priv->session_cont.ac.match = iscsi_session_match; 4654 priv->session_cont.ac.grp = &iscsi_session_group; 4655 transport_container_register(&priv->session_cont); 4656 4657 spin_lock_irqsave(&iscsi_transport_lock, flags); 4658 list_add(&priv->list, &iscsi_transports); 4659 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4660 4661 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4662 return &priv->t; 4663 4664 unregister_dev: 4665 device_unregister(&priv->dev); 4666 return NULL; 4667 free_priv: 4668 kfree(priv); 4669 return NULL; 4670 } 4671 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4672 4673 int iscsi_unregister_transport(struct iscsi_transport *tt) 4674 { 4675 struct iscsi_internal *priv; 4676 unsigned long flags; 4677 4678 BUG_ON(!tt); 4679 4680 mutex_lock(&rx_queue_mutex); 4681 4682 priv = iscsi_if_transport_lookup(tt); 4683 BUG_ON (!priv); 4684 4685 spin_lock_irqsave(&iscsi_transport_lock, flags); 4686 list_del(&priv->list); 4687 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4688 4689 transport_container_unregister(&priv->conn_cont); 4690 transport_container_unregister(&priv->session_cont); 4691 transport_container_unregister(&priv->t.host_attrs); 4692 4693 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4694 device_unregister(&priv->dev); 4695 mutex_unlock(&rx_queue_mutex); 4696 4697 return 0; 4698 } 4699 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4700 4701 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4702 struct device *dev, const char *fmt, ...) 4703 { 4704 struct va_format vaf; 4705 va_list args; 4706 4707 va_start(args, fmt); 4708 vaf.fmt = fmt; 4709 vaf.va = &args; 4710 trace(dev, &vaf); 4711 va_end(args); 4712 } 4713 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4714 4715 static __init int iscsi_transport_init(void) 4716 { 4717 int err; 4718 struct netlink_kernel_cfg cfg = { 4719 .groups = 1, 4720 .input = iscsi_if_rx, 4721 }; 4722 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4723 ISCSI_TRANSPORT_VERSION); 4724 4725 atomic_set(&iscsi_session_nr, 0); 4726 4727 err = class_register(&iscsi_transport_class); 4728 if (err) 4729 return err; 4730 4731 err = class_register(&iscsi_endpoint_class); 4732 if (err) 4733 goto unregister_transport_class; 4734 4735 err = class_register(&iscsi_iface_class); 4736 if (err) 4737 goto unregister_endpoint_class; 4738 4739 err = transport_class_register(&iscsi_host_class); 4740 if (err) 4741 goto unregister_iface_class; 4742 4743 err = transport_class_register(&iscsi_connection_class); 4744 if (err) 4745 goto unregister_host_class; 4746 4747 err = transport_class_register(&iscsi_session_class); 4748 if (err) 4749 goto unregister_conn_class; 4750 4751 err = bus_register(&iscsi_flashnode_bus); 4752 if (err) 4753 goto unregister_session_class; 4754 4755 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4756 if (!nls) { 4757 err = -ENOBUFS; 4758 goto unregister_flashnode_bus; 4759 } 4760 4761 iscsi_eh_timer_workq = alloc_workqueue("%s", 4762 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4763 2, "iscsi_eh"); 4764 if (!iscsi_eh_timer_workq) { 4765 err = -ENOMEM; 4766 goto release_nls; 4767 } 4768 4769 iscsi_destroy_workq = create_singlethread_workqueue("iscsi_destroy"); 4770 if (!iscsi_destroy_workq) { 4771 err = -ENOMEM; 4772 goto destroy_wq; 4773 } 4774 4775 return 0; 4776 4777 destroy_wq: 4778 destroy_workqueue(iscsi_eh_timer_workq); 4779 release_nls: 4780 netlink_kernel_release(nls); 4781 unregister_flashnode_bus: 4782 bus_unregister(&iscsi_flashnode_bus); 4783 unregister_session_class: 4784 transport_class_unregister(&iscsi_session_class); 4785 unregister_conn_class: 4786 transport_class_unregister(&iscsi_connection_class); 4787 unregister_host_class: 4788 transport_class_unregister(&iscsi_host_class); 4789 unregister_iface_class: 4790 class_unregister(&iscsi_iface_class); 4791 unregister_endpoint_class: 4792 class_unregister(&iscsi_endpoint_class); 4793 unregister_transport_class: 4794 class_unregister(&iscsi_transport_class); 4795 return err; 4796 } 4797 4798 static void __exit iscsi_transport_exit(void) 4799 { 4800 destroy_workqueue(iscsi_destroy_workq); 4801 destroy_workqueue(iscsi_eh_timer_workq); 4802 netlink_kernel_release(nls); 4803 bus_unregister(&iscsi_flashnode_bus); 4804 transport_class_unregister(&iscsi_connection_class); 4805 transport_class_unregister(&iscsi_session_class); 4806 transport_class_unregister(&iscsi_host_class); 4807 class_unregister(&iscsi_endpoint_class); 4808 class_unregister(&iscsi_iface_class); 4809 class_unregister(&iscsi_transport_class); 4810 } 4811 4812 module_init(iscsi_transport_init); 4813 module_exit(iscsi_transport_exit); 4814 4815 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4816 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4817 "Alex Aizman <itn780@yahoo.com>"); 4818 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4819 MODULE_LICENSE("GPL"); 4820 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4821 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4822