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); 135 136 if (!capable(CAP_SYS_ADMIN)) 137 return -EACCES; 138 return sysfs_emit(buf, "%llu\n", 139 (unsigned long long)iscsi_handle(priv->iscsi_transport)); 140 } 141 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); 142 143 #define show_transport_attr(name, format) \ 144 static ssize_t \ 145 show_transport_##name(struct device *dev, \ 146 struct device_attribute *attr,char *buf) \ 147 { \ 148 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ 149 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\ 150 } \ 151 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); 152 153 show_transport_attr(caps, "0x%x"); 154 155 static struct attribute *iscsi_transport_attrs[] = { 156 &dev_attr_handle.attr, 157 &dev_attr_caps.attr, 158 NULL, 159 }; 160 161 static struct attribute_group iscsi_transport_group = { 162 .attrs = iscsi_transport_attrs, 163 }; 164 165 /* 166 * iSCSI endpoint attrs 167 */ 168 #define iscsi_dev_to_endpoint(_dev) \ 169 container_of(_dev, struct iscsi_endpoint, dev) 170 171 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ 172 struct device_attribute dev_attr_##_prefix##_##_name = \ 173 __ATTR(_name,_mode,_show,_store) 174 175 static void iscsi_endpoint_release(struct device *dev) 176 { 177 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 178 kfree(ep); 179 } 180 181 static struct class iscsi_endpoint_class = { 182 .name = "iscsi_endpoint", 183 .dev_release = iscsi_endpoint_release, 184 }; 185 186 static ssize_t 187 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) 188 { 189 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 190 return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id); 191 } 192 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); 193 194 static struct attribute *iscsi_endpoint_attrs[] = { 195 &dev_attr_ep_handle.attr, 196 NULL, 197 }; 198 199 static struct attribute_group iscsi_endpoint_group = { 200 .attrs = iscsi_endpoint_attrs, 201 }; 202 203 #define ISCSI_MAX_EPID -1 204 205 static int iscsi_match_epid(struct device *dev, const void *data) 206 { 207 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 208 const uint64_t *epid = data; 209 210 return *epid == ep->id; 211 } 212 213 struct iscsi_endpoint * 214 iscsi_create_endpoint(int dd_size) 215 { 216 struct device *dev; 217 struct iscsi_endpoint *ep; 218 uint64_t id; 219 int err; 220 221 for (id = 1; id < ISCSI_MAX_EPID; id++) { 222 dev = class_find_device(&iscsi_endpoint_class, NULL, &id, 223 iscsi_match_epid); 224 if (!dev) 225 break; 226 else 227 put_device(dev); 228 } 229 if (id == ISCSI_MAX_EPID) { 230 printk(KERN_ERR "Too many connections. Max supported %u\n", 231 ISCSI_MAX_EPID - 1); 232 return NULL; 233 } 234 235 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); 236 if (!ep) 237 return NULL; 238 239 ep->id = id; 240 ep->dev.class = &iscsi_endpoint_class; 241 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); 242 err = device_register(&ep->dev); 243 if (err) 244 goto free_ep; 245 246 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); 247 if (err) 248 goto unregister_dev; 249 250 if (dd_size) 251 ep->dd_data = &ep[1]; 252 return ep; 253 254 unregister_dev: 255 device_unregister(&ep->dev); 256 return NULL; 257 258 free_ep: 259 kfree(ep); 260 return NULL; 261 } 262 EXPORT_SYMBOL_GPL(iscsi_create_endpoint); 263 264 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) 265 { 266 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); 267 device_unregister(&ep->dev); 268 } 269 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); 270 271 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 272 { 273 struct iscsi_endpoint *ep; 274 struct device *dev; 275 276 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, 277 iscsi_match_epid); 278 if (!dev) 279 return NULL; 280 281 ep = iscsi_dev_to_endpoint(dev); 282 /* 283 * we can drop this now because the interface will prevent 284 * removals and lookups from racing. 285 */ 286 put_device(dev); 287 return ep; 288 } 289 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 290 291 /* 292 * Interface to display network param to sysfs 293 */ 294 295 static void iscsi_iface_release(struct device *dev) 296 { 297 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 298 struct device *parent = iface->dev.parent; 299 300 kfree(iface); 301 put_device(parent); 302 } 303 304 305 static struct class iscsi_iface_class = { 306 .name = "iscsi_iface", 307 .dev_release = iscsi_iface_release, 308 }; 309 310 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 311 struct device_attribute dev_attr_##_prefix##_##_name = \ 312 __ATTR(_name, _mode, _show, _store) 313 314 /* iface attrs show */ 315 #define iscsi_iface_attr_show(type, name, param_type, param) \ 316 static ssize_t \ 317 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 318 char *buf) \ 319 { \ 320 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 321 struct iscsi_transport *t = iface->transport; \ 322 return t->get_iface_param(iface, param_type, param, buf); \ 323 } \ 324 325 #define iscsi_iface_net_attr(type, name, param) \ 326 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 327 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 328 329 #define iscsi_iface_attr(type, name, param) \ 330 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 331 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 332 333 /* generic read only ipv4 attribute */ 334 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 335 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 336 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 337 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 338 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 339 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 340 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 341 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 342 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 343 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 344 iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 345 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 346 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 347 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 348 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 349 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 350 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 351 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 352 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 353 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 354 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 355 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 356 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 357 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 358 iscsi_iface_net_attr(ipv4_iface, fragment_disable, 359 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 360 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 361 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 362 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 363 364 /* generic read only ipv6 attribute */ 365 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 366 iscsi_iface_net_attr(ipv6_iface, link_local_addr, 367 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 368 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 369 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 370 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 371 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 372 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 373 iscsi_iface_net_attr(ipv6_iface, link_local_state, 374 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 375 iscsi_iface_net_attr(ipv6_iface, router_state, 376 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 377 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 378 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 379 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 380 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 381 iscsi_iface_net_attr(ipv6_iface, traffic_class, 382 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 383 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 384 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 385 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 386 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 387 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 388 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 389 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 390 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 391 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 392 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 393 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 394 395 /* common read only iface attribute */ 396 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 397 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 398 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 399 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 400 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 401 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 402 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 403 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 404 iscsi_iface_net_attr(iface, tcp_nagle_disable, 405 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 406 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 407 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 408 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 409 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 410 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 411 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 412 413 /* common iscsi specific settings attributes */ 414 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 415 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 416 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 417 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 418 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 419 iscsi_iface_attr(iface, data_seq_in_order, 420 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 421 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 422 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 423 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 424 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 425 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 426 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 427 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 428 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 429 iscsi_iface_attr(iface, discovery_auth_optional, 430 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 431 iscsi_iface_attr(iface, discovery_logout, 432 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 433 iscsi_iface_attr(iface, strict_login_comp_en, 434 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 435 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 436 437 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 438 struct attribute *attr, int i) 439 { 440 struct device *dev = container_of(kobj, struct device, kobj); 441 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 442 struct iscsi_transport *t = iface->transport; 443 int param; 444 int param_type; 445 446 if (attr == &dev_attr_iface_enabled.attr) 447 param = ISCSI_NET_PARAM_IFACE_ENABLE; 448 else if (attr == &dev_attr_iface_vlan_id.attr) 449 param = ISCSI_NET_PARAM_VLAN_ID; 450 else if (attr == &dev_attr_iface_vlan_priority.attr) 451 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 452 else if (attr == &dev_attr_iface_vlan_enabled.attr) 453 param = ISCSI_NET_PARAM_VLAN_ENABLED; 454 else if (attr == &dev_attr_iface_mtu.attr) 455 param = ISCSI_NET_PARAM_MTU; 456 else if (attr == &dev_attr_iface_port.attr) 457 param = ISCSI_NET_PARAM_PORT; 458 else if (attr == &dev_attr_iface_ipaddress_state.attr) 459 param = ISCSI_NET_PARAM_IPADDR_STATE; 460 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 461 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 462 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 463 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 464 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 465 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 466 else if (attr == &dev_attr_iface_tcp_wsf.attr) 467 param = ISCSI_NET_PARAM_TCP_WSF; 468 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 469 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 470 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 471 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 472 else if (attr == &dev_attr_iface_cache_id.attr) 473 param = ISCSI_NET_PARAM_CACHE_ID; 474 else if (attr == &dev_attr_iface_redirect_en.attr) 475 param = ISCSI_NET_PARAM_REDIRECT_EN; 476 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 477 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 478 else if (attr == &dev_attr_iface_header_digest.attr) 479 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 480 else if (attr == &dev_attr_iface_data_digest.attr) 481 param = ISCSI_IFACE_PARAM_DATADGST_EN; 482 else if (attr == &dev_attr_iface_immediate_data.attr) 483 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 484 else if (attr == &dev_attr_iface_initial_r2t.attr) 485 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 486 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 487 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 488 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 489 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 490 else if (attr == &dev_attr_iface_erl.attr) 491 param = ISCSI_IFACE_PARAM_ERL; 492 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 493 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 494 else if (attr == &dev_attr_iface_first_burst_len.attr) 495 param = ISCSI_IFACE_PARAM_FIRST_BURST; 496 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 497 param = ISCSI_IFACE_PARAM_MAX_R2T; 498 else if (attr == &dev_attr_iface_max_burst_len.attr) 499 param = ISCSI_IFACE_PARAM_MAX_BURST; 500 else if (attr == &dev_attr_iface_chap_auth.attr) 501 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 502 else if (attr == &dev_attr_iface_bidi_chap.attr) 503 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 504 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 505 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 506 else if (attr == &dev_attr_iface_discovery_logout.attr) 507 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 508 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 509 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 510 else if (attr == &dev_attr_iface_initiator_name.attr) 511 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 512 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 513 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 514 param = ISCSI_NET_PARAM_IPV4_ADDR; 515 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 516 param = ISCSI_NET_PARAM_IPV4_GW; 517 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 518 param = ISCSI_NET_PARAM_IPV4_SUBNET; 519 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 520 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 521 else if (attr == 522 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 523 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 524 else if (attr == 525 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 526 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 527 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 528 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 529 else if (attr == &dev_attr_ipv4_iface_tos.attr) 530 param = ISCSI_NET_PARAM_IPV4_TOS; 531 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 532 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 533 else if (attr == 534 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 535 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 536 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 537 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 538 else if (attr == 539 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 540 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 541 else if (attr == 542 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 543 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 544 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 545 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 546 else if (attr == 547 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 548 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 549 else if (attr == 550 &dev_attr_ipv4_iface_fragment_disable.attr) 551 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 552 else if (attr == 553 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 554 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 555 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 556 param = ISCSI_NET_PARAM_IPV4_TTL; 557 else 558 return 0; 559 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 560 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 561 param = ISCSI_NET_PARAM_IPV6_ADDR; 562 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 563 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 564 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 565 param = ISCSI_NET_PARAM_IPV6_ROUTER; 566 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 567 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 568 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 569 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 570 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 571 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 572 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 573 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 574 else if (attr == 575 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 576 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 577 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 578 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 579 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 580 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 581 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 582 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 583 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 584 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 585 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 586 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 587 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 588 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 589 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 590 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 591 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 592 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 593 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 594 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 595 else 596 return 0; 597 } else { 598 WARN_ONCE(1, "Invalid iface attr"); 599 return 0; 600 } 601 602 switch (param) { 603 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO: 604 case ISCSI_IFACE_PARAM_HDRDGST_EN: 605 case ISCSI_IFACE_PARAM_DATADGST_EN: 606 case ISCSI_IFACE_PARAM_IMM_DATA_EN: 607 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN: 608 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN: 609 case ISCSI_IFACE_PARAM_PDU_INORDER_EN: 610 case ISCSI_IFACE_PARAM_ERL: 611 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH: 612 case ISCSI_IFACE_PARAM_FIRST_BURST: 613 case ISCSI_IFACE_PARAM_MAX_R2T: 614 case ISCSI_IFACE_PARAM_MAX_BURST: 615 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN: 616 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN: 617 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL: 618 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN: 619 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN: 620 case ISCSI_IFACE_PARAM_INITIATOR_NAME: 621 param_type = ISCSI_IFACE_PARAM; 622 break; 623 default: 624 param_type = ISCSI_NET_PARAM; 625 } 626 627 return t->attr_is_visible(param_type, param); 628 } 629 630 static struct attribute *iscsi_iface_attrs[] = { 631 &dev_attr_iface_enabled.attr, 632 &dev_attr_iface_vlan_id.attr, 633 &dev_attr_iface_vlan_priority.attr, 634 &dev_attr_iface_vlan_enabled.attr, 635 &dev_attr_ipv4_iface_ipaddress.attr, 636 &dev_attr_ipv4_iface_gateway.attr, 637 &dev_attr_ipv4_iface_subnet.attr, 638 &dev_attr_ipv4_iface_bootproto.attr, 639 &dev_attr_ipv6_iface_ipaddress.attr, 640 &dev_attr_ipv6_iface_link_local_addr.attr, 641 &dev_attr_ipv6_iface_router_addr.attr, 642 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 643 &dev_attr_ipv6_iface_link_local_autocfg.attr, 644 &dev_attr_iface_mtu.attr, 645 &dev_attr_iface_port.attr, 646 &dev_attr_iface_ipaddress_state.attr, 647 &dev_attr_iface_delayed_ack_en.attr, 648 &dev_attr_iface_tcp_nagle_disable.attr, 649 &dev_attr_iface_tcp_wsf_disable.attr, 650 &dev_attr_iface_tcp_wsf.attr, 651 &dev_attr_iface_tcp_timer_scale.attr, 652 &dev_attr_iface_tcp_timestamp_en.attr, 653 &dev_attr_iface_cache_id.attr, 654 &dev_attr_iface_redirect_en.attr, 655 &dev_attr_iface_def_taskmgmt_tmo.attr, 656 &dev_attr_iface_header_digest.attr, 657 &dev_attr_iface_data_digest.attr, 658 &dev_attr_iface_immediate_data.attr, 659 &dev_attr_iface_initial_r2t.attr, 660 &dev_attr_iface_data_seq_in_order.attr, 661 &dev_attr_iface_data_pdu_in_order.attr, 662 &dev_attr_iface_erl.attr, 663 &dev_attr_iface_max_recv_dlength.attr, 664 &dev_attr_iface_first_burst_len.attr, 665 &dev_attr_iface_max_outstanding_r2t.attr, 666 &dev_attr_iface_max_burst_len.attr, 667 &dev_attr_iface_chap_auth.attr, 668 &dev_attr_iface_bidi_chap.attr, 669 &dev_attr_iface_discovery_auth_optional.attr, 670 &dev_attr_iface_discovery_logout.attr, 671 &dev_attr_iface_strict_login_comp_en.attr, 672 &dev_attr_iface_initiator_name.attr, 673 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 674 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 675 &dev_attr_ipv4_iface_tos_en.attr, 676 &dev_attr_ipv4_iface_tos.attr, 677 &dev_attr_ipv4_iface_grat_arp_en.attr, 678 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 679 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 680 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 681 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 682 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 683 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 684 &dev_attr_ipv4_iface_fragment_disable.attr, 685 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 686 &dev_attr_ipv4_iface_ttl.attr, 687 &dev_attr_ipv6_iface_link_local_state.attr, 688 &dev_attr_ipv6_iface_router_state.attr, 689 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 690 &dev_attr_ipv6_iface_mld_en.attr, 691 &dev_attr_ipv6_iface_flow_label.attr, 692 &dev_attr_ipv6_iface_traffic_class.attr, 693 &dev_attr_ipv6_iface_hop_limit.attr, 694 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 695 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 696 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 697 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 698 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 699 NULL, 700 }; 701 702 static struct attribute_group iscsi_iface_group = { 703 .attrs = iscsi_iface_attrs, 704 .is_visible = iscsi_iface_attr_is_visible, 705 }; 706 707 /* convert iscsi_ipaddress_state values to ascii string name */ 708 static const struct { 709 enum iscsi_ipaddress_state value; 710 char *name; 711 } iscsi_ipaddress_state_names[] = { 712 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 713 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 714 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 715 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 716 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 717 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 718 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 719 }; 720 721 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 722 { 723 int i; 724 char *state = NULL; 725 726 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 727 if (iscsi_ipaddress_state_names[i].value == port_state) { 728 state = iscsi_ipaddress_state_names[i].name; 729 break; 730 } 731 } 732 return state; 733 } 734 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 735 736 /* convert iscsi_router_state values to ascii string name */ 737 static const struct { 738 enum iscsi_router_state value; 739 char *name; 740 } iscsi_router_state_names[] = { 741 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 742 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 743 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 744 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 745 }; 746 747 char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 748 { 749 int i; 750 char *state = NULL; 751 752 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 753 if (iscsi_router_state_names[i].value == router_state) { 754 state = iscsi_router_state_names[i].name; 755 break; 756 } 757 } 758 return state; 759 } 760 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 761 762 struct iscsi_iface * 763 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 764 uint32_t iface_type, uint32_t iface_num, int dd_size) 765 { 766 struct iscsi_iface *iface; 767 int err; 768 769 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 770 if (!iface) 771 return NULL; 772 773 iface->transport = transport; 774 iface->iface_type = iface_type; 775 iface->iface_num = iface_num; 776 iface->dev.release = iscsi_iface_release; 777 iface->dev.class = &iscsi_iface_class; 778 /* parent reference released in iscsi_iface_release */ 779 iface->dev.parent = get_device(&shost->shost_gendev); 780 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 781 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 782 iface_num); 783 else 784 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 785 iface_num); 786 787 err = device_register(&iface->dev); 788 if (err) 789 goto free_iface; 790 791 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 792 if (err) 793 goto unreg_iface; 794 795 if (dd_size) 796 iface->dd_data = &iface[1]; 797 return iface; 798 799 unreg_iface: 800 device_unregister(&iface->dev); 801 return NULL; 802 803 free_iface: 804 put_device(iface->dev.parent); 805 kfree(iface); 806 return NULL; 807 } 808 EXPORT_SYMBOL_GPL(iscsi_create_iface); 809 810 void iscsi_destroy_iface(struct iscsi_iface *iface) 811 { 812 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 813 device_unregister(&iface->dev); 814 } 815 EXPORT_SYMBOL_GPL(iscsi_destroy_iface); 816 817 /* 818 * Interface to display flash node params to sysfs 819 */ 820 821 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ 822 struct device_attribute dev_attr_##_prefix##_##_name = \ 823 __ATTR(_name, _mode, _show, _store) 824 825 /* flash node session attrs show */ 826 #define iscsi_flashnode_sess_attr_show(type, name, param) \ 827 static ssize_t \ 828 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 829 char *buf) \ 830 { \ 831 struct iscsi_bus_flash_session *fnode_sess = \ 832 iscsi_dev_to_flash_session(dev);\ 833 struct iscsi_transport *t = fnode_sess->transport; \ 834 return t->get_flashnode_param(fnode_sess, param, buf); \ 835 } \ 836 837 838 #define iscsi_flashnode_sess_attr(type, name, param) \ 839 iscsi_flashnode_sess_attr_show(type, name, param) \ 840 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 841 show_##type##_##name, NULL); 842 843 /* Flash node session attributes */ 844 845 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 846 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 847 iscsi_flashnode_sess_attr(fnode, discovery_session, 848 ISCSI_FLASHNODE_DISCOVERY_SESS); 849 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 850 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 851 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 852 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 853 iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 854 ISCSI_FLASHNODE_DATASEQ_INORDER); 855 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 856 ISCSI_FLASHNODE_PDU_INORDER); 857 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 858 iscsi_flashnode_sess_attr(fnode, discovery_logout, 859 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 860 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 861 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 862 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 863 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 864 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 865 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 866 iscsi_flashnode_sess_attr(fnode, def_time2retain, 867 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 868 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 869 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 870 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 871 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 872 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 873 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 874 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 875 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 876 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 877 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 878 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 879 iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 880 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 881 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 882 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 883 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 884 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 885 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 886 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 887 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 888 889 static struct attribute *iscsi_flashnode_sess_attrs[] = { 890 &dev_attr_fnode_auto_snd_tgt_disable.attr, 891 &dev_attr_fnode_discovery_session.attr, 892 &dev_attr_fnode_portal_type.attr, 893 &dev_attr_fnode_entry_enable.attr, 894 &dev_attr_fnode_immediate_data.attr, 895 &dev_attr_fnode_initial_r2t.attr, 896 &dev_attr_fnode_data_seq_in_order.attr, 897 &dev_attr_fnode_data_pdu_in_order.attr, 898 &dev_attr_fnode_chap_auth.attr, 899 &dev_attr_fnode_discovery_logout.attr, 900 &dev_attr_fnode_bidi_chap.attr, 901 &dev_attr_fnode_discovery_auth_optional.attr, 902 &dev_attr_fnode_erl.attr, 903 &dev_attr_fnode_first_burst_len.attr, 904 &dev_attr_fnode_def_time2wait.attr, 905 &dev_attr_fnode_def_time2retain.attr, 906 &dev_attr_fnode_max_outstanding_r2t.attr, 907 &dev_attr_fnode_isid.attr, 908 &dev_attr_fnode_tsid.attr, 909 &dev_attr_fnode_max_burst_len.attr, 910 &dev_attr_fnode_def_taskmgmt_tmo.attr, 911 &dev_attr_fnode_targetalias.attr, 912 &dev_attr_fnode_targetname.attr, 913 &dev_attr_fnode_tpgt.attr, 914 &dev_attr_fnode_discovery_parent_idx.attr, 915 &dev_attr_fnode_discovery_parent_type.attr, 916 &dev_attr_fnode_chap_in_idx.attr, 917 &dev_attr_fnode_chap_out_idx.attr, 918 &dev_attr_fnode_username.attr, 919 &dev_attr_fnode_username_in.attr, 920 &dev_attr_fnode_password.attr, 921 &dev_attr_fnode_password_in.attr, 922 &dev_attr_fnode_is_boot_target.attr, 923 NULL, 924 }; 925 926 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, 927 struct attribute *attr, 928 int i) 929 { 930 struct device *dev = container_of(kobj, struct device, kobj); 931 struct iscsi_bus_flash_session *fnode_sess = 932 iscsi_dev_to_flash_session(dev); 933 struct iscsi_transport *t = fnode_sess->transport; 934 int param; 935 936 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { 937 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; 938 } else if (attr == &dev_attr_fnode_discovery_session.attr) { 939 param = ISCSI_FLASHNODE_DISCOVERY_SESS; 940 } else if (attr == &dev_attr_fnode_portal_type.attr) { 941 param = ISCSI_FLASHNODE_PORTAL_TYPE; 942 } else if (attr == &dev_attr_fnode_entry_enable.attr) { 943 param = ISCSI_FLASHNODE_ENTRY_EN; 944 } else if (attr == &dev_attr_fnode_immediate_data.attr) { 945 param = ISCSI_FLASHNODE_IMM_DATA_EN; 946 } else if (attr == &dev_attr_fnode_initial_r2t.attr) { 947 param = ISCSI_FLASHNODE_INITIAL_R2T_EN; 948 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { 949 param = ISCSI_FLASHNODE_DATASEQ_INORDER; 950 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { 951 param = ISCSI_FLASHNODE_PDU_INORDER; 952 } else if (attr == &dev_attr_fnode_chap_auth.attr) { 953 param = ISCSI_FLASHNODE_CHAP_AUTH_EN; 954 } else if (attr == &dev_attr_fnode_discovery_logout.attr) { 955 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; 956 } else if (attr == &dev_attr_fnode_bidi_chap.attr) { 957 param = ISCSI_FLASHNODE_BIDI_CHAP_EN; 958 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { 959 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; 960 } else if (attr == &dev_attr_fnode_erl.attr) { 961 param = ISCSI_FLASHNODE_ERL; 962 } else if (attr == &dev_attr_fnode_first_burst_len.attr) { 963 param = ISCSI_FLASHNODE_FIRST_BURST; 964 } else if (attr == &dev_attr_fnode_def_time2wait.attr) { 965 param = ISCSI_FLASHNODE_DEF_TIME2WAIT; 966 } else if (attr == &dev_attr_fnode_def_time2retain.attr) { 967 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; 968 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { 969 param = ISCSI_FLASHNODE_MAX_R2T; 970 } else if (attr == &dev_attr_fnode_isid.attr) { 971 param = ISCSI_FLASHNODE_ISID; 972 } else if (attr == &dev_attr_fnode_tsid.attr) { 973 param = ISCSI_FLASHNODE_TSID; 974 } else if (attr == &dev_attr_fnode_max_burst_len.attr) { 975 param = ISCSI_FLASHNODE_MAX_BURST; 976 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { 977 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; 978 } else if (attr == &dev_attr_fnode_targetalias.attr) { 979 param = ISCSI_FLASHNODE_ALIAS; 980 } else if (attr == &dev_attr_fnode_targetname.attr) { 981 param = ISCSI_FLASHNODE_NAME; 982 } else if (attr == &dev_attr_fnode_tpgt.attr) { 983 param = ISCSI_FLASHNODE_TPGT; 984 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { 985 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; 986 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { 987 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; 988 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { 989 param = ISCSI_FLASHNODE_CHAP_IN_IDX; 990 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { 991 param = ISCSI_FLASHNODE_CHAP_OUT_IDX; 992 } else if (attr == &dev_attr_fnode_username.attr) { 993 param = ISCSI_FLASHNODE_USERNAME; 994 } else if (attr == &dev_attr_fnode_username_in.attr) { 995 param = ISCSI_FLASHNODE_USERNAME_IN; 996 } else if (attr == &dev_attr_fnode_password.attr) { 997 param = ISCSI_FLASHNODE_PASSWORD; 998 } else if (attr == &dev_attr_fnode_password_in.attr) { 999 param = ISCSI_FLASHNODE_PASSWORD_IN; 1000 } else if (attr == &dev_attr_fnode_is_boot_target.attr) { 1001 param = ISCSI_FLASHNODE_IS_BOOT_TGT; 1002 } else { 1003 WARN_ONCE(1, "Invalid flashnode session attr"); 1004 return 0; 1005 } 1006 1007 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1008 } 1009 1010 static struct attribute_group iscsi_flashnode_sess_attr_group = { 1011 .attrs = iscsi_flashnode_sess_attrs, 1012 .is_visible = iscsi_flashnode_sess_attr_is_visible, 1013 }; 1014 1015 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 1016 &iscsi_flashnode_sess_attr_group, 1017 NULL, 1018 }; 1019 1020 static void iscsi_flashnode_sess_release(struct device *dev) 1021 { 1022 struct iscsi_bus_flash_session *fnode_sess = 1023 iscsi_dev_to_flash_session(dev); 1024 1025 kfree(fnode_sess->targetname); 1026 kfree(fnode_sess->targetalias); 1027 kfree(fnode_sess->portal_type); 1028 kfree(fnode_sess); 1029 } 1030 1031 static const struct device_type iscsi_flashnode_sess_dev_type = { 1032 .name = "iscsi_flashnode_sess_dev_type", 1033 .groups = iscsi_flashnode_sess_attr_groups, 1034 .release = iscsi_flashnode_sess_release, 1035 }; 1036 1037 /* flash node connection attrs show */ 1038 #define iscsi_flashnode_conn_attr_show(type, name, param) \ 1039 static ssize_t \ 1040 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 1041 char *buf) \ 1042 { \ 1043 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ 1044 struct iscsi_bus_flash_session *fnode_sess = \ 1045 iscsi_flash_conn_to_flash_session(fnode_conn);\ 1046 struct iscsi_transport *t = fnode_conn->transport; \ 1047 return t->get_flashnode_param(fnode_sess, param, buf); \ 1048 } \ 1049 1050 1051 #define iscsi_flashnode_conn_attr(type, name, param) \ 1052 iscsi_flashnode_conn_attr_show(type, name, param) \ 1053 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1054 show_##type##_##name, NULL); 1055 1056 /* Flash node connection attributes */ 1057 1058 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1059 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1060 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1061 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1062 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1063 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1064 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1065 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1066 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1067 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1068 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1069 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1070 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1071 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1072 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1073 iscsi_flashnode_conn_attr(fnode, fragment_disable, 1074 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1075 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1076 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1077 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1078 iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1079 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1080 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1081 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1082 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1083 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1084 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1085 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1086 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1087 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1088 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1089 iscsi_flashnode_conn_attr(fnode, max_segment_size, 1090 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1091 iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1092 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1093 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1094 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1095 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1096 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1097 1098 static struct attribute *iscsi_flashnode_conn_attrs[] = { 1099 &dev_attr_fnode_is_fw_assigned_ipv6.attr, 1100 &dev_attr_fnode_header_digest.attr, 1101 &dev_attr_fnode_data_digest.attr, 1102 &dev_attr_fnode_snack_req.attr, 1103 &dev_attr_fnode_tcp_timestamp_stat.attr, 1104 &dev_attr_fnode_tcp_nagle_disable.attr, 1105 &dev_attr_fnode_tcp_wsf_disable.attr, 1106 &dev_attr_fnode_tcp_timer_scale.attr, 1107 &dev_attr_fnode_tcp_timestamp_enable.attr, 1108 &dev_attr_fnode_fragment_disable.attr, 1109 &dev_attr_fnode_max_recv_dlength.attr, 1110 &dev_attr_fnode_max_xmit_dlength.attr, 1111 &dev_attr_fnode_keepalive_tmo.attr, 1112 &dev_attr_fnode_port.attr, 1113 &dev_attr_fnode_ipaddress.attr, 1114 &dev_attr_fnode_redirect_ipaddr.attr, 1115 &dev_attr_fnode_max_segment_size.attr, 1116 &dev_attr_fnode_local_port.attr, 1117 &dev_attr_fnode_ipv4_tos.attr, 1118 &dev_attr_fnode_ipv6_traffic_class.attr, 1119 &dev_attr_fnode_ipv6_flow_label.attr, 1120 &dev_attr_fnode_link_local_ipv6.attr, 1121 &dev_attr_fnode_tcp_xmit_wsf.attr, 1122 &dev_attr_fnode_tcp_recv_wsf.attr, 1123 &dev_attr_fnode_statsn.attr, 1124 &dev_attr_fnode_exp_statsn.attr, 1125 NULL, 1126 }; 1127 1128 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, 1129 struct attribute *attr, 1130 int i) 1131 { 1132 struct device *dev = container_of(kobj, struct device, kobj); 1133 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1134 struct iscsi_transport *t = fnode_conn->transport; 1135 int param; 1136 1137 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { 1138 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; 1139 } else if (attr == &dev_attr_fnode_header_digest.attr) { 1140 param = ISCSI_FLASHNODE_HDR_DGST_EN; 1141 } else if (attr == &dev_attr_fnode_data_digest.attr) { 1142 param = ISCSI_FLASHNODE_DATA_DGST_EN; 1143 } else if (attr == &dev_attr_fnode_snack_req.attr) { 1144 param = ISCSI_FLASHNODE_SNACK_REQ_EN; 1145 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { 1146 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; 1147 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { 1148 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; 1149 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { 1150 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; 1151 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { 1152 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; 1153 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { 1154 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; 1155 } else if (attr == &dev_attr_fnode_fragment_disable.attr) { 1156 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; 1157 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { 1158 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; 1159 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { 1160 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; 1161 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { 1162 param = ISCSI_FLASHNODE_KEEPALIVE_TMO; 1163 } else if (attr == &dev_attr_fnode_port.attr) { 1164 param = ISCSI_FLASHNODE_PORT; 1165 } else if (attr == &dev_attr_fnode_ipaddress.attr) { 1166 param = ISCSI_FLASHNODE_IPADDR; 1167 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { 1168 param = ISCSI_FLASHNODE_REDIRECT_IPADDR; 1169 } else if (attr == &dev_attr_fnode_max_segment_size.attr) { 1170 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; 1171 } else if (attr == &dev_attr_fnode_local_port.attr) { 1172 param = ISCSI_FLASHNODE_LOCAL_PORT; 1173 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { 1174 param = ISCSI_FLASHNODE_IPV4_TOS; 1175 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { 1176 param = ISCSI_FLASHNODE_IPV6_TC; 1177 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { 1178 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; 1179 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { 1180 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; 1181 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { 1182 param = ISCSI_FLASHNODE_TCP_XMIT_WSF; 1183 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { 1184 param = ISCSI_FLASHNODE_TCP_RECV_WSF; 1185 } else if (attr == &dev_attr_fnode_statsn.attr) { 1186 param = ISCSI_FLASHNODE_STATSN; 1187 } else if (attr == &dev_attr_fnode_exp_statsn.attr) { 1188 param = ISCSI_FLASHNODE_EXP_STATSN; 1189 } else { 1190 WARN_ONCE(1, "Invalid flashnode connection attr"); 1191 return 0; 1192 } 1193 1194 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1195 } 1196 1197 static struct attribute_group iscsi_flashnode_conn_attr_group = { 1198 .attrs = iscsi_flashnode_conn_attrs, 1199 .is_visible = iscsi_flashnode_conn_attr_is_visible, 1200 }; 1201 1202 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1203 &iscsi_flashnode_conn_attr_group, 1204 NULL, 1205 }; 1206 1207 static void iscsi_flashnode_conn_release(struct device *dev) 1208 { 1209 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1210 1211 kfree(fnode_conn->ipaddress); 1212 kfree(fnode_conn->redirect_ipaddr); 1213 kfree(fnode_conn->link_local_ipv6_addr); 1214 kfree(fnode_conn); 1215 } 1216 1217 static const struct device_type iscsi_flashnode_conn_dev_type = { 1218 .name = "iscsi_flashnode_conn_dev_type", 1219 .groups = iscsi_flashnode_conn_attr_groups, 1220 .release = iscsi_flashnode_conn_release, 1221 }; 1222 1223 static struct bus_type iscsi_flashnode_bus; 1224 1225 int iscsi_flashnode_bus_match(struct device *dev, 1226 struct device_driver *drv) 1227 { 1228 if (dev->bus == &iscsi_flashnode_bus) 1229 return 1; 1230 return 0; 1231 } 1232 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1233 1234 static struct bus_type iscsi_flashnode_bus = { 1235 .name = "iscsi_flashnode", 1236 .match = &iscsi_flashnode_bus_match, 1237 }; 1238 1239 /** 1240 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs 1241 * @shost: pointer to host data 1242 * @index: index of flashnode to add in sysfs 1243 * @transport: pointer to transport data 1244 * @dd_size: total size to allocate 1245 * 1246 * Adds a sysfs entry for the flashnode session attributes 1247 * 1248 * Returns: 1249 * pointer to allocated flashnode sess on success 1250 * %NULL on failure 1251 */ 1252 struct iscsi_bus_flash_session * 1253 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, 1254 struct iscsi_transport *transport, 1255 int dd_size) 1256 { 1257 struct iscsi_bus_flash_session *fnode_sess; 1258 int err; 1259 1260 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); 1261 if (!fnode_sess) 1262 return NULL; 1263 1264 fnode_sess->transport = transport; 1265 fnode_sess->target_id = index; 1266 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; 1267 fnode_sess->dev.bus = &iscsi_flashnode_bus; 1268 fnode_sess->dev.parent = &shost->shost_gendev; 1269 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", 1270 shost->host_no, index); 1271 1272 err = device_register(&fnode_sess->dev); 1273 if (err) 1274 goto free_fnode_sess; 1275 1276 if (dd_size) 1277 fnode_sess->dd_data = &fnode_sess[1]; 1278 1279 return fnode_sess; 1280 1281 free_fnode_sess: 1282 kfree(fnode_sess); 1283 return NULL; 1284 } 1285 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); 1286 1287 /** 1288 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs 1289 * @shost: pointer to host data 1290 * @fnode_sess: pointer to the parent flashnode session entry 1291 * @transport: pointer to transport data 1292 * @dd_size: total size to allocate 1293 * 1294 * Adds a sysfs entry for the flashnode connection attributes 1295 * 1296 * Returns: 1297 * pointer to allocated flashnode conn on success 1298 * %NULL on failure 1299 */ 1300 struct iscsi_bus_flash_conn * 1301 iscsi_create_flashnode_conn(struct Scsi_Host *shost, 1302 struct iscsi_bus_flash_session *fnode_sess, 1303 struct iscsi_transport *transport, 1304 int dd_size) 1305 { 1306 struct iscsi_bus_flash_conn *fnode_conn; 1307 int err; 1308 1309 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); 1310 if (!fnode_conn) 1311 return NULL; 1312 1313 fnode_conn->transport = transport; 1314 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; 1315 fnode_conn->dev.bus = &iscsi_flashnode_bus; 1316 fnode_conn->dev.parent = &fnode_sess->dev; 1317 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", 1318 shost->host_no, fnode_sess->target_id); 1319 1320 err = device_register(&fnode_conn->dev); 1321 if (err) 1322 goto free_fnode_conn; 1323 1324 if (dd_size) 1325 fnode_conn->dd_data = &fnode_conn[1]; 1326 1327 return fnode_conn; 1328 1329 free_fnode_conn: 1330 kfree(fnode_conn); 1331 return NULL; 1332 } 1333 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); 1334 1335 /** 1336 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn 1337 * @dev: device to verify 1338 * @data: pointer to data containing value to use for verification 1339 * 1340 * Verifies if the passed device is flashnode conn device 1341 * 1342 * Returns: 1343 * 1 on success 1344 * 0 on failure 1345 */ 1346 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1347 { 1348 return dev->bus == &iscsi_flashnode_bus; 1349 } 1350 1351 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1352 { 1353 device_unregister(&fnode_conn->dev); 1354 return 0; 1355 } 1356 1357 static int flashnode_match_index(struct device *dev, void *data) 1358 { 1359 struct iscsi_bus_flash_session *fnode_sess = NULL; 1360 int ret = 0; 1361 1362 if (!iscsi_flashnode_bus_match(dev, NULL)) 1363 goto exit_match_index; 1364 1365 fnode_sess = iscsi_dev_to_flash_session(dev); 1366 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1367 1368 exit_match_index: 1369 return ret; 1370 } 1371 1372 /** 1373 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1374 * @shost: pointer to host data 1375 * @idx: index to match 1376 * 1377 * Finds the flashnode session object for the passed index 1378 * 1379 * Returns: 1380 * pointer to found flashnode session object on success 1381 * %NULL on failure 1382 */ 1383 static struct iscsi_bus_flash_session * 1384 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1385 { 1386 struct iscsi_bus_flash_session *fnode_sess = NULL; 1387 struct device *dev; 1388 1389 dev = device_find_child(&shost->shost_gendev, &idx, 1390 flashnode_match_index); 1391 if (dev) 1392 fnode_sess = iscsi_dev_to_flash_session(dev); 1393 1394 return fnode_sess; 1395 } 1396 1397 /** 1398 * iscsi_find_flashnode_sess - finds flashnode session entry 1399 * @shost: pointer to host data 1400 * @data: pointer to data containing value to use for comparison 1401 * @fn: function pointer that does actual comparison 1402 * 1403 * Finds the flashnode session object comparing the data passed using logic 1404 * defined in passed function pointer 1405 * 1406 * Returns: 1407 * pointer to found flashnode session device object on success 1408 * %NULL on failure 1409 */ 1410 struct device * 1411 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1412 int (*fn)(struct device *dev, void *data)) 1413 { 1414 return device_find_child(&shost->shost_gendev, data, fn); 1415 } 1416 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1417 1418 /** 1419 * iscsi_find_flashnode_conn - finds flashnode connection entry 1420 * @fnode_sess: pointer to parent flashnode session entry 1421 * 1422 * Finds the flashnode connection object comparing the data passed using logic 1423 * defined in passed function pointer 1424 * 1425 * Returns: 1426 * pointer to found flashnode connection device object on success 1427 * %NULL on failure 1428 */ 1429 struct device * 1430 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1431 { 1432 return device_find_child(&fnode_sess->dev, NULL, 1433 iscsi_is_flashnode_conn_dev); 1434 } 1435 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1436 1437 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1438 { 1439 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1440 return 0; 1441 1442 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1443 } 1444 1445 /** 1446 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1447 * @fnode_sess: pointer to flashnode session entry to be destroyed 1448 * 1449 * Deletes the flashnode session entry and all children flashnode connection 1450 * entries from sysfs 1451 */ 1452 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1453 { 1454 int err; 1455 1456 err = device_for_each_child(&fnode_sess->dev, NULL, 1457 iscsi_iter_destroy_flashnode_conn_fn); 1458 if (err) 1459 pr_err("Could not delete all connections for %s. Error %d.\n", 1460 fnode_sess->dev.kobj.name, err); 1461 1462 device_unregister(&fnode_sess->dev); 1463 } 1464 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1465 1466 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1467 { 1468 if (!iscsi_flashnode_bus_match(dev, NULL)) 1469 return 0; 1470 1471 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1472 return 0; 1473 } 1474 1475 /** 1476 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1477 * @shost: pointer to host data 1478 * 1479 * Destroys all the flashnode session entries and all corresponding children 1480 * flashnode connection entries from sysfs 1481 */ 1482 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1483 { 1484 device_for_each_child(&shost->shost_gendev, NULL, 1485 iscsi_iter_destroy_flashnode_fn); 1486 } 1487 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1488 1489 /* 1490 * BSG support 1491 */ 1492 /** 1493 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1494 * @job: bsg job to be processed 1495 */ 1496 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1497 { 1498 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1499 struct iscsi_bsg_request *req = job->request; 1500 struct iscsi_bsg_reply *reply = job->reply; 1501 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1502 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1503 int ret; 1504 1505 /* check if we have the msgcode value at least */ 1506 if (job->request_len < sizeof(uint32_t)) { 1507 ret = -ENOMSG; 1508 goto fail_host_msg; 1509 } 1510 1511 /* Validate the host command */ 1512 switch (req->msgcode) { 1513 case ISCSI_BSG_HST_VENDOR: 1514 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1515 if ((shost->hostt->vendor_id == 0L) || 1516 (req->rqst_data.h_vendor.vendor_id != 1517 shost->hostt->vendor_id)) { 1518 ret = -ESRCH; 1519 goto fail_host_msg; 1520 } 1521 break; 1522 default: 1523 ret = -EBADR; 1524 goto fail_host_msg; 1525 } 1526 1527 /* check if we really have all the request data needed */ 1528 if (job->request_len < cmdlen) { 1529 ret = -ENOMSG; 1530 goto fail_host_msg; 1531 } 1532 1533 ret = i->iscsi_transport->bsg_request(job); 1534 if (!ret) 1535 return 0; 1536 1537 fail_host_msg: 1538 /* return the errno failure code as the only status */ 1539 BUG_ON(job->reply_len < sizeof(uint32_t)); 1540 reply->reply_payload_rcv_len = 0; 1541 reply->result = ret; 1542 job->reply_len = sizeof(uint32_t); 1543 bsg_job_done(job, ret, 0); 1544 return 0; 1545 } 1546 1547 /** 1548 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1549 * @shost: shost for iscsi_host 1550 * @ihost: iscsi_cls_host adding the structures to 1551 */ 1552 static int 1553 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1554 { 1555 struct device *dev = &shost->shost_gendev; 1556 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1557 struct request_queue *q; 1558 char bsg_name[20]; 1559 1560 if (!i->iscsi_transport->bsg_request) 1561 return -ENOTSUPP; 1562 1563 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1564 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1565 if (IS_ERR(q)) { 1566 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1567 "initialize - no request queue\n"); 1568 return PTR_ERR(q); 1569 } 1570 __scsi_init_queue(shost, q); 1571 1572 ihost->bsg_q = q; 1573 return 0; 1574 } 1575 1576 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1577 struct device *cdev) 1578 { 1579 struct Scsi_Host *shost = dev_to_shost(dev); 1580 struct iscsi_cls_host *ihost = shost->shost_data; 1581 1582 memset(ihost, 0, sizeof(*ihost)); 1583 atomic_set(&ihost->nr_scans, 0); 1584 mutex_init(&ihost->mutex); 1585 1586 iscsi_bsg_host_add(shost, ihost); 1587 /* ignore any bsg add error - we just can't do sgio */ 1588 1589 return 0; 1590 } 1591 1592 static int iscsi_remove_host(struct transport_container *tc, 1593 struct device *dev, struct device *cdev) 1594 { 1595 struct Scsi_Host *shost = dev_to_shost(dev); 1596 struct iscsi_cls_host *ihost = shost->shost_data; 1597 1598 bsg_remove_queue(ihost->bsg_q); 1599 return 0; 1600 } 1601 1602 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1603 "iscsi_host", 1604 iscsi_setup_host, 1605 iscsi_remove_host, 1606 NULL); 1607 1608 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1609 "iscsi_session", 1610 NULL, 1611 NULL, 1612 NULL); 1613 1614 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1615 "iscsi_connection", 1616 NULL, 1617 NULL, 1618 NULL); 1619 1620 static struct sock *nls; 1621 static DEFINE_MUTEX(rx_queue_mutex); 1622 1623 /* 1624 * conn_mutex protects the {start,bind,stop,destroy}_conn from racing 1625 * against the kernel stop_connection recovery mechanism 1626 */ 1627 static DEFINE_MUTEX(conn_mutex); 1628 1629 static LIST_HEAD(sesslist); 1630 static DEFINE_SPINLOCK(sesslock); 1631 static LIST_HEAD(connlist); 1632 static LIST_HEAD(connlist_err); 1633 static DEFINE_SPINLOCK(connlock); 1634 1635 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1636 { 1637 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1638 return sess->sid; 1639 } 1640 1641 /* 1642 * Returns the matching session to a given sid 1643 */ 1644 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1645 { 1646 unsigned long flags; 1647 struct iscsi_cls_session *sess; 1648 1649 spin_lock_irqsave(&sesslock, flags); 1650 list_for_each_entry(sess, &sesslist, sess_list) { 1651 if (sess->sid == sid) { 1652 spin_unlock_irqrestore(&sesslock, flags); 1653 return sess; 1654 } 1655 } 1656 spin_unlock_irqrestore(&sesslock, flags); 1657 return NULL; 1658 } 1659 1660 /* 1661 * Returns the matching connection to a given sid / cid tuple 1662 */ 1663 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1664 { 1665 unsigned long flags; 1666 struct iscsi_cls_conn *conn; 1667 1668 spin_lock_irqsave(&connlock, flags); 1669 list_for_each_entry(conn, &connlist, conn_list) { 1670 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1671 spin_unlock_irqrestore(&connlock, flags); 1672 return conn; 1673 } 1674 } 1675 spin_unlock_irqrestore(&connlock, flags); 1676 return NULL; 1677 } 1678 1679 /* 1680 * The following functions can be used by LLDs that allocate 1681 * their own scsi_hosts or by software iscsi LLDs 1682 */ 1683 static struct { 1684 int value; 1685 char *name; 1686 } iscsi_session_state_names[] = { 1687 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1688 { ISCSI_SESSION_FAILED, "FAILED" }, 1689 { ISCSI_SESSION_FREE, "FREE" }, 1690 }; 1691 1692 static const char *iscsi_session_state_name(int state) 1693 { 1694 int i; 1695 char *name = NULL; 1696 1697 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1698 if (iscsi_session_state_names[i].value == state) { 1699 name = iscsi_session_state_names[i].name; 1700 break; 1701 } 1702 } 1703 return name; 1704 } 1705 1706 int iscsi_session_chkready(struct iscsi_cls_session *session) 1707 { 1708 int err; 1709 1710 switch (session->state) { 1711 case ISCSI_SESSION_LOGGED_IN: 1712 err = 0; 1713 break; 1714 case ISCSI_SESSION_FAILED: 1715 err = DID_IMM_RETRY << 16; 1716 break; 1717 case ISCSI_SESSION_FREE: 1718 err = DID_TRANSPORT_FAILFAST << 16; 1719 break; 1720 default: 1721 err = DID_NO_CONNECT << 16; 1722 break; 1723 } 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 * Blocking the session can be done from any context so we only 1982 * queue the block work. Make sure the unblock work has completed 1983 * because it flushes/cancels the other works and updates the state. 1984 */ 1985 flush_work(&session->unblock_work); 1986 } 1987 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1988 1989 static void __iscsi_block_session(struct work_struct *work) 1990 { 1991 struct iscsi_cls_session *session = 1992 container_of(work, struct iscsi_cls_session, 1993 block_work); 1994 unsigned long flags; 1995 1996 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1997 spin_lock_irqsave(&session->lock, flags); 1998 session->state = ISCSI_SESSION_FAILED; 1999 spin_unlock_irqrestore(&session->lock, flags); 2000 scsi_target_block(&session->dev); 2001 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 2002 if (session->recovery_tmo >= 0) 2003 queue_delayed_work(iscsi_eh_timer_workq, 2004 &session->recovery_work, 2005 session->recovery_tmo * HZ); 2006 } 2007 2008 void iscsi_block_session(struct iscsi_cls_session *session) 2009 { 2010 queue_work(iscsi_eh_timer_workq, &session->block_work); 2011 } 2012 EXPORT_SYMBOL_GPL(iscsi_block_session); 2013 2014 static void __iscsi_unbind_session(struct work_struct *work) 2015 { 2016 struct iscsi_cls_session *session = 2017 container_of(work, struct iscsi_cls_session, 2018 unbind_work); 2019 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2020 struct iscsi_cls_host *ihost = shost->shost_data; 2021 unsigned long flags; 2022 unsigned int target_id; 2023 2024 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 2025 2026 /* Prevent new scans and make sure scanning is not in progress */ 2027 mutex_lock(&ihost->mutex); 2028 spin_lock_irqsave(&session->lock, flags); 2029 if (session->target_id == ISCSI_MAX_TARGET) { 2030 spin_unlock_irqrestore(&session->lock, flags); 2031 mutex_unlock(&ihost->mutex); 2032 goto unbind_session_exit; 2033 } 2034 2035 target_id = session->target_id; 2036 session->target_id = ISCSI_MAX_TARGET; 2037 spin_unlock_irqrestore(&session->lock, flags); 2038 mutex_unlock(&ihost->mutex); 2039 2040 scsi_remove_target(&session->dev); 2041 2042 if (session->ida_used) 2043 ida_simple_remove(&iscsi_sess_ida, target_id); 2044 2045 unbind_session_exit: 2046 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2047 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2048 } 2049 2050 static void __iscsi_destroy_session(struct work_struct *work) 2051 { 2052 struct iscsi_cls_session *session = 2053 container_of(work, struct iscsi_cls_session, destroy_work); 2054 2055 session->transport->destroy_session(session); 2056 } 2057 2058 struct iscsi_cls_session * 2059 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2060 int dd_size) 2061 { 2062 struct iscsi_cls_session *session; 2063 2064 session = kzalloc(sizeof(*session) + dd_size, 2065 GFP_KERNEL); 2066 if (!session) 2067 return NULL; 2068 2069 session->transport = transport; 2070 session->creator = -1; 2071 session->recovery_tmo = 120; 2072 session->recovery_tmo_sysfs_override = false; 2073 session->state = ISCSI_SESSION_FREE; 2074 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2075 INIT_LIST_HEAD(&session->sess_list); 2076 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2077 INIT_WORK(&session->block_work, __iscsi_block_session); 2078 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2079 INIT_WORK(&session->scan_work, iscsi_scan_session); 2080 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2081 spin_lock_init(&session->lock); 2082 2083 /* this is released in the dev's release function */ 2084 scsi_host_get(shost); 2085 session->dev.parent = &shost->shost_gendev; 2086 session->dev.release = iscsi_session_release; 2087 device_initialize(&session->dev); 2088 if (dd_size) 2089 session->dd_data = &session[1]; 2090 2091 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2092 return session; 2093 } 2094 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2095 2096 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2097 { 2098 unsigned long flags; 2099 int id = 0; 2100 int err; 2101 2102 session->sid = atomic_add_return(1, &iscsi_session_nr); 2103 2104 if (target_id == ISCSI_MAX_TARGET) { 2105 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); 2106 2107 if (id < 0) { 2108 iscsi_cls_session_printk(KERN_ERR, session, 2109 "Failure in Target ID Allocation\n"); 2110 return id; 2111 } 2112 session->target_id = (unsigned int)id; 2113 session->ida_used = true; 2114 } else 2115 session->target_id = target_id; 2116 2117 dev_set_name(&session->dev, "session%u", session->sid); 2118 err = device_add(&session->dev); 2119 if (err) { 2120 iscsi_cls_session_printk(KERN_ERR, session, 2121 "could not register session's dev\n"); 2122 goto release_ida; 2123 } 2124 err = transport_register_device(&session->dev); 2125 if (err) { 2126 iscsi_cls_session_printk(KERN_ERR, session, 2127 "could not register transport's dev\n"); 2128 goto release_dev; 2129 } 2130 2131 spin_lock_irqsave(&sesslock, flags); 2132 list_add(&session->sess_list, &sesslist); 2133 spin_unlock_irqrestore(&sesslock, flags); 2134 2135 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2136 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2137 return 0; 2138 2139 release_dev: 2140 device_del(&session->dev); 2141 release_ida: 2142 if (session->ida_used) 2143 ida_simple_remove(&iscsi_sess_ida, session->target_id); 2144 2145 return err; 2146 } 2147 EXPORT_SYMBOL_GPL(iscsi_add_session); 2148 2149 /** 2150 * iscsi_create_session - create iscsi class session 2151 * @shost: scsi host 2152 * @transport: iscsi transport 2153 * @dd_size: private driver data size 2154 * @target_id: which target 2155 * 2156 * This can be called from a LLD or iscsi_transport. 2157 */ 2158 struct iscsi_cls_session * 2159 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2160 int dd_size, unsigned int target_id) 2161 { 2162 struct iscsi_cls_session *session; 2163 2164 session = iscsi_alloc_session(shost, transport, dd_size); 2165 if (!session) 2166 return NULL; 2167 2168 if (iscsi_add_session(session, target_id)) { 2169 iscsi_free_session(session); 2170 return NULL; 2171 } 2172 return session; 2173 } 2174 EXPORT_SYMBOL_GPL(iscsi_create_session); 2175 2176 static void iscsi_conn_release(struct device *dev) 2177 { 2178 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2179 struct device *parent = conn->dev.parent; 2180 2181 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2182 kfree(conn); 2183 put_device(parent); 2184 } 2185 2186 static int iscsi_is_conn_dev(const struct device *dev) 2187 { 2188 return dev->release == iscsi_conn_release; 2189 } 2190 2191 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2192 { 2193 if (!iscsi_is_conn_dev(dev)) 2194 return 0; 2195 return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); 2196 } 2197 2198 void iscsi_remove_session(struct iscsi_cls_session *session) 2199 { 2200 unsigned long flags; 2201 int err; 2202 2203 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2204 2205 spin_lock_irqsave(&sesslock, flags); 2206 if (!list_empty(&session->sess_list)) 2207 list_del(&session->sess_list); 2208 spin_unlock_irqrestore(&sesslock, flags); 2209 2210 flush_work(&session->block_work); 2211 flush_work(&session->unblock_work); 2212 cancel_delayed_work_sync(&session->recovery_work); 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 device_unregister(&conn->dev); 2318 put_device(&session->dev); 2319 return NULL; 2320 release_parent_ref: 2321 put_device(&session->dev); 2322 free_conn: 2323 kfree(conn); 2324 return NULL; 2325 } 2326 2327 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2328 2329 /** 2330 * iscsi_destroy_conn - destroy iscsi class connection 2331 * @conn: iscsi cls session 2332 * 2333 * This can be called from a LLD or iscsi_transport. 2334 */ 2335 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2336 { 2337 unsigned long flags; 2338 2339 spin_lock_irqsave(&connlock, flags); 2340 list_del(&conn->conn_list); 2341 list_del(&conn->conn_list_err); 2342 spin_unlock_irqrestore(&connlock, flags); 2343 2344 transport_unregister_device(&conn->dev); 2345 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2346 device_unregister(&conn->dev); 2347 return 0; 2348 } 2349 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2350 2351 /* 2352 * iscsi interface functions 2353 */ 2354 static struct iscsi_internal * 2355 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2356 { 2357 struct iscsi_internal *priv; 2358 unsigned long flags; 2359 2360 spin_lock_irqsave(&iscsi_transport_lock, flags); 2361 list_for_each_entry(priv, &iscsi_transports, list) { 2362 if (tt == priv->iscsi_transport) { 2363 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2364 return priv; 2365 } 2366 } 2367 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2368 return NULL; 2369 } 2370 2371 static int 2372 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2373 { 2374 return nlmsg_multicast(nls, skb, 0, group, gfp); 2375 } 2376 2377 static int 2378 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2379 { 2380 return nlmsg_unicast(nls, skb, portid); 2381 } 2382 2383 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2384 char *data, uint32_t data_size) 2385 { 2386 struct nlmsghdr *nlh; 2387 struct sk_buff *skb; 2388 struct iscsi_uevent *ev; 2389 char *pdu; 2390 struct iscsi_internal *priv; 2391 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2392 data_size); 2393 2394 priv = iscsi_if_transport_lookup(conn->transport); 2395 if (!priv) 2396 return -EINVAL; 2397 2398 skb = alloc_skb(len, GFP_ATOMIC); 2399 if (!skb) { 2400 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2401 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2402 "control PDU: OOM\n"); 2403 return -ENOMEM; 2404 } 2405 2406 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2407 ev = nlmsg_data(nlh); 2408 memset(ev, 0, sizeof(*ev)); 2409 ev->transport_handle = iscsi_handle(conn->transport); 2410 ev->type = ISCSI_KEVENT_RECV_PDU; 2411 ev->r.recv_req.cid = conn->cid; 2412 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2413 pdu = (char*)ev + sizeof(*ev); 2414 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2415 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2416 2417 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2418 } 2419 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2420 2421 int iscsi_offload_mesg(struct Scsi_Host *shost, 2422 struct iscsi_transport *transport, uint32_t type, 2423 char *data, uint16_t data_size) 2424 { 2425 struct nlmsghdr *nlh; 2426 struct sk_buff *skb; 2427 struct iscsi_uevent *ev; 2428 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2429 2430 skb = alloc_skb(len, GFP_ATOMIC); 2431 if (!skb) { 2432 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2433 return -ENOMEM; 2434 } 2435 2436 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2437 ev = nlmsg_data(nlh); 2438 memset(ev, 0, sizeof(*ev)); 2439 ev->type = type; 2440 ev->transport_handle = iscsi_handle(transport); 2441 switch (type) { 2442 case ISCSI_KEVENT_PATH_REQ: 2443 ev->r.req_path.host_no = shost->host_no; 2444 break; 2445 case ISCSI_KEVENT_IF_DOWN: 2446 ev->r.notify_if_down.host_no = shost->host_no; 2447 break; 2448 } 2449 2450 memcpy((char *)ev + sizeof(*ev), data, data_size); 2451 2452 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2453 } 2454 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2455 2456 /* 2457 * This can be called without the rx_queue_mutex, if invoked by the kernel 2458 * stop work. But, in that case, it is guaranteed not to race with 2459 * iscsi_destroy by conn_mutex. 2460 */ 2461 static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2462 { 2463 /* 2464 * It is important that this path doesn't rely on 2465 * rx_queue_mutex, otherwise, a thread doing allocation on a 2466 * start_session/start_connection could sleep waiting on a 2467 * writeback to a failed iscsi device, that cannot be recovered 2468 * because the lock is held. If we don't hold it here, the 2469 * kernel stop_conn_work_fn has a chance to stop the broken 2470 * session and resolve the allocation. 2471 * 2472 * Still, the user invoked .stop_conn() needs to be serialized 2473 * with stop_conn_work_fn by a private mutex. Not pretty, but 2474 * it works. 2475 */ 2476 mutex_lock(&conn_mutex); 2477 conn->transport->stop_conn(conn, flag); 2478 conn->state = ISCSI_CONN_DOWN; 2479 mutex_unlock(&conn_mutex); 2480 2481 } 2482 2483 static void stop_conn_work_fn(struct work_struct *work) 2484 { 2485 struct iscsi_cls_conn *conn, *tmp; 2486 unsigned long flags; 2487 LIST_HEAD(recovery_list); 2488 2489 spin_lock_irqsave(&connlock, flags); 2490 if (list_empty(&connlist_err)) { 2491 spin_unlock_irqrestore(&connlock, flags); 2492 return; 2493 } 2494 list_splice_init(&connlist_err, &recovery_list); 2495 spin_unlock_irqrestore(&connlock, flags); 2496 2497 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) { 2498 uint32_t sid = iscsi_conn_get_sid(conn); 2499 struct iscsi_cls_session *session; 2500 2501 session = iscsi_session_lookup(sid); 2502 if (session) { 2503 if (system_state != SYSTEM_RUNNING) { 2504 session->recovery_tmo = 0; 2505 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2506 } else { 2507 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER); 2508 } 2509 } 2510 2511 list_del_init(&conn->conn_list_err); 2512 } 2513 } 2514 2515 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2516 { 2517 struct nlmsghdr *nlh; 2518 struct sk_buff *skb; 2519 struct iscsi_uevent *ev; 2520 struct iscsi_internal *priv; 2521 int len = nlmsg_total_size(sizeof(*ev)); 2522 unsigned long flags; 2523 2524 spin_lock_irqsave(&connlock, flags); 2525 list_add(&conn->conn_list_err, &connlist_err); 2526 spin_unlock_irqrestore(&connlock, flags); 2527 queue_work(system_unbound_wq, &stop_conn_work); 2528 2529 priv = iscsi_if_transport_lookup(conn->transport); 2530 if (!priv) 2531 return; 2532 2533 skb = alloc_skb(len, GFP_ATOMIC); 2534 if (!skb) { 2535 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2536 "conn error (%d)\n", error); 2537 return; 2538 } 2539 2540 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2541 ev = nlmsg_data(nlh); 2542 ev->transport_handle = iscsi_handle(conn->transport); 2543 ev->type = ISCSI_KEVENT_CONN_ERROR; 2544 ev->r.connerror.error = error; 2545 ev->r.connerror.cid = conn->cid; 2546 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2547 2548 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2549 2550 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2551 error); 2552 } 2553 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2554 2555 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2556 enum iscsi_conn_state state) 2557 { 2558 struct nlmsghdr *nlh; 2559 struct sk_buff *skb; 2560 struct iscsi_uevent *ev; 2561 struct iscsi_internal *priv; 2562 int len = nlmsg_total_size(sizeof(*ev)); 2563 2564 priv = iscsi_if_transport_lookup(conn->transport); 2565 if (!priv) 2566 return; 2567 2568 skb = alloc_skb(len, GFP_ATOMIC); 2569 if (!skb) { 2570 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2571 "conn login (%d)\n", state); 2572 return; 2573 } 2574 2575 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2576 ev = nlmsg_data(nlh); 2577 ev->transport_handle = iscsi_handle(conn->transport); 2578 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2579 ev->r.conn_login.state = state; 2580 ev->r.conn_login.cid = conn->cid; 2581 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2582 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2583 2584 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2585 state); 2586 } 2587 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2588 2589 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2590 enum iscsi_host_event_code code, uint32_t data_size, 2591 uint8_t *data) 2592 { 2593 struct nlmsghdr *nlh; 2594 struct sk_buff *skb; 2595 struct iscsi_uevent *ev; 2596 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2597 2598 skb = alloc_skb(len, GFP_NOIO); 2599 if (!skb) { 2600 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2601 host_no, code); 2602 return; 2603 } 2604 2605 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2606 ev = nlmsg_data(nlh); 2607 ev->transport_handle = iscsi_handle(transport); 2608 ev->type = ISCSI_KEVENT_HOST_EVENT; 2609 ev->r.host_event.host_no = host_no; 2610 ev->r.host_event.code = code; 2611 ev->r.host_event.data_size = data_size; 2612 2613 if (data_size) 2614 memcpy((char *)ev + sizeof(*ev), data, data_size); 2615 2616 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2617 } 2618 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2619 2620 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2621 uint32_t status, uint32_t pid, uint32_t data_size, 2622 uint8_t *data) 2623 { 2624 struct nlmsghdr *nlh; 2625 struct sk_buff *skb; 2626 struct iscsi_uevent *ev; 2627 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2628 2629 skb = alloc_skb(len, GFP_NOIO); 2630 if (!skb) { 2631 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2632 return; 2633 } 2634 2635 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2636 ev = nlmsg_data(nlh); 2637 ev->transport_handle = iscsi_handle(transport); 2638 ev->type = ISCSI_KEVENT_PING_COMP; 2639 ev->r.ping_comp.host_no = host_no; 2640 ev->r.ping_comp.status = status; 2641 ev->r.ping_comp.pid = pid; 2642 ev->r.ping_comp.data_size = data_size; 2643 memcpy((char *)ev + sizeof(*ev), data, data_size); 2644 2645 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2646 } 2647 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2648 2649 static int 2650 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2651 { 2652 struct sk_buff *skb; 2653 struct nlmsghdr *nlh; 2654 int len = nlmsg_total_size(size); 2655 2656 skb = alloc_skb(len, GFP_ATOMIC); 2657 if (!skb) { 2658 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2659 return -ENOMEM; 2660 } 2661 2662 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2663 memcpy(nlmsg_data(nlh), payload, size); 2664 return iscsi_unicast_skb(skb, portid); 2665 } 2666 2667 static int 2668 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2669 { 2670 struct iscsi_uevent *ev = nlmsg_data(nlh); 2671 struct iscsi_stats *stats; 2672 struct sk_buff *skbstat; 2673 struct iscsi_cls_conn *conn; 2674 struct nlmsghdr *nlhstat; 2675 struct iscsi_uevent *evstat; 2676 struct iscsi_internal *priv; 2677 int len = nlmsg_total_size(sizeof(*ev) + 2678 sizeof(struct iscsi_stats) + 2679 sizeof(struct iscsi_stats_custom) * 2680 ISCSI_STATS_CUSTOM_MAX); 2681 int err = 0; 2682 2683 priv = iscsi_if_transport_lookup(transport); 2684 if (!priv) 2685 return -EINVAL; 2686 2687 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2688 if (!conn) 2689 return -EEXIST; 2690 2691 do { 2692 int actual_size; 2693 2694 skbstat = alloc_skb(len, GFP_ATOMIC); 2695 if (!skbstat) { 2696 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2697 "deliver stats: OOM\n"); 2698 return -ENOMEM; 2699 } 2700 2701 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2702 (len - sizeof(*nlhstat)), 0); 2703 evstat = nlmsg_data(nlhstat); 2704 memset(evstat, 0, sizeof(*evstat)); 2705 evstat->transport_handle = iscsi_handle(conn->transport); 2706 evstat->type = nlh->nlmsg_type; 2707 evstat->u.get_stats.cid = 2708 ev->u.get_stats.cid; 2709 evstat->u.get_stats.sid = 2710 ev->u.get_stats.sid; 2711 stats = (struct iscsi_stats *) 2712 ((char*)evstat + sizeof(*evstat)); 2713 memset(stats, 0, sizeof(*stats)); 2714 2715 transport->get_stats(conn, stats); 2716 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2717 sizeof(struct iscsi_stats) + 2718 sizeof(struct iscsi_stats_custom) * 2719 stats->custom_length); 2720 actual_size -= sizeof(*nlhstat); 2721 actual_size = nlmsg_msg_size(actual_size); 2722 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2723 nlhstat->nlmsg_len = actual_size; 2724 2725 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2726 GFP_ATOMIC); 2727 } while (err < 0 && err != -ECONNREFUSED); 2728 2729 return err; 2730 } 2731 2732 /** 2733 * iscsi_session_event - send session destr. completion event 2734 * @session: iscsi class session 2735 * @event: type of event 2736 */ 2737 int iscsi_session_event(struct iscsi_cls_session *session, 2738 enum iscsi_uevent_e event) 2739 { 2740 struct iscsi_internal *priv; 2741 struct Scsi_Host *shost; 2742 struct iscsi_uevent *ev; 2743 struct sk_buff *skb; 2744 struct nlmsghdr *nlh; 2745 int rc, len = nlmsg_total_size(sizeof(*ev)); 2746 2747 priv = iscsi_if_transport_lookup(session->transport); 2748 if (!priv) 2749 return -EINVAL; 2750 shost = iscsi_session_to_shost(session); 2751 2752 skb = alloc_skb(len, GFP_KERNEL); 2753 if (!skb) { 2754 iscsi_cls_session_printk(KERN_ERR, session, 2755 "Cannot notify userspace of session " 2756 "event %u\n", event); 2757 return -ENOMEM; 2758 } 2759 2760 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2761 ev = nlmsg_data(nlh); 2762 ev->transport_handle = iscsi_handle(session->transport); 2763 2764 ev->type = event; 2765 switch (event) { 2766 case ISCSI_KEVENT_DESTROY_SESSION: 2767 ev->r.d_session.host_no = shost->host_no; 2768 ev->r.d_session.sid = session->sid; 2769 break; 2770 case ISCSI_KEVENT_CREATE_SESSION: 2771 ev->r.c_session_ret.host_no = shost->host_no; 2772 ev->r.c_session_ret.sid = session->sid; 2773 break; 2774 case ISCSI_KEVENT_UNBIND_SESSION: 2775 ev->r.unbind_session.host_no = shost->host_no; 2776 ev->r.unbind_session.sid = session->sid; 2777 break; 2778 default: 2779 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2780 "%u.\n", event); 2781 kfree_skb(skb); 2782 return -EINVAL; 2783 } 2784 2785 /* 2786 * this will occur if the daemon is not up, so we just warn 2787 * the user and when the daemon is restarted it will handle it 2788 */ 2789 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2790 if (rc == -ESRCH) 2791 iscsi_cls_session_printk(KERN_ERR, session, 2792 "Cannot notify userspace of session " 2793 "event %u. Check iscsi daemon\n", 2794 event); 2795 2796 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2797 event, rc); 2798 return rc; 2799 } 2800 EXPORT_SYMBOL_GPL(iscsi_session_event); 2801 2802 static int 2803 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2804 struct iscsi_uevent *ev, pid_t pid, 2805 uint32_t initial_cmdsn, uint16_t cmds_max, 2806 uint16_t queue_depth) 2807 { 2808 struct iscsi_transport *transport = priv->iscsi_transport; 2809 struct iscsi_cls_session *session; 2810 struct Scsi_Host *shost; 2811 2812 session = transport->create_session(ep, cmds_max, queue_depth, 2813 initial_cmdsn); 2814 if (!session) 2815 return -ENOMEM; 2816 2817 session->creator = pid; 2818 shost = iscsi_session_to_shost(session); 2819 ev->r.c_session_ret.host_no = shost->host_no; 2820 ev->r.c_session_ret.sid = session->sid; 2821 ISCSI_DBG_TRANS_SESSION(session, 2822 "Completed creating transport session\n"); 2823 return 0; 2824 } 2825 2826 static int 2827 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2828 { 2829 struct iscsi_cls_conn *conn; 2830 struct iscsi_cls_session *session; 2831 2832 session = iscsi_session_lookup(ev->u.c_conn.sid); 2833 if (!session) { 2834 printk(KERN_ERR "iscsi: invalid session %d.\n", 2835 ev->u.c_conn.sid); 2836 return -EINVAL; 2837 } 2838 2839 conn = transport->create_conn(session, ev->u.c_conn.cid); 2840 if (!conn) { 2841 iscsi_cls_session_printk(KERN_ERR, session, 2842 "couldn't create a new connection."); 2843 return -ENOMEM; 2844 } 2845 2846 ev->r.c_conn_ret.sid = session->sid; 2847 ev->r.c_conn_ret.cid = conn->cid; 2848 2849 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2850 return 0; 2851 } 2852 2853 static int 2854 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2855 { 2856 struct iscsi_cls_conn *conn; 2857 unsigned long flags; 2858 2859 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2860 if (!conn) 2861 return -EINVAL; 2862 2863 spin_lock_irqsave(&connlock, flags); 2864 if (!list_empty(&conn->conn_list_err)) { 2865 spin_unlock_irqrestore(&connlock, flags); 2866 return -EAGAIN; 2867 } 2868 spin_unlock_irqrestore(&connlock, flags); 2869 2870 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2871 2872 mutex_lock(&conn_mutex); 2873 if (transport->destroy_conn) 2874 transport->destroy_conn(conn); 2875 mutex_unlock(&conn_mutex); 2876 2877 return 0; 2878 } 2879 2880 static int 2881 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2882 { 2883 char *data = (char*)ev + sizeof(*ev); 2884 struct iscsi_cls_conn *conn; 2885 struct iscsi_cls_session *session; 2886 int err = 0, value = 0; 2887 2888 if (ev->u.set_param.len > PAGE_SIZE) 2889 return -EINVAL; 2890 2891 session = iscsi_session_lookup(ev->u.set_param.sid); 2892 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2893 if (!conn || !session) 2894 return -EINVAL; 2895 2896 switch (ev->u.set_param.param) { 2897 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2898 sscanf(data, "%d", &value); 2899 if (!session->recovery_tmo_sysfs_override) 2900 session->recovery_tmo = value; 2901 break; 2902 default: 2903 err = transport->set_param(conn, ev->u.set_param.param, 2904 data, ev->u.set_param.len); 2905 if ((conn->state == ISCSI_CONN_BOUND) || 2906 (conn->state == ISCSI_CONN_UP)) { 2907 err = transport->set_param(conn, ev->u.set_param.param, 2908 data, ev->u.set_param.len); 2909 } else { 2910 return -ENOTCONN; 2911 } 2912 } 2913 2914 return err; 2915 } 2916 2917 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2918 struct iscsi_uevent *ev, int msg_type) 2919 { 2920 struct iscsi_endpoint *ep; 2921 struct sockaddr *dst_addr; 2922 struct Scsi_Host *shost = NULL; 2923 int non_blocking, err = 0; 2924 2925 if (!transport->ep_connect) 2926 return -EINVAL; 2927 2928 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2929 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2930 if (!shost) { 2931 printk(KERN_ERR "ep connect failed. Could not find " 2932 "host no %u\n", 2933 ev->u.ep_connect_through_host.host_no); 2934 return -ENODEV; 2935 } 2936 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2937 } else 2938 non_blocking = ev->u.ep_connect.non_blocking; 2939 2940 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2941 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2942 if (IS_ERR(ep)) { 2943 err = PTR_ERR(ep); 2944 goto release_host; 2945 } 2946 2947 ev->r.ep_connect_ret.handle = ep->id; 2948 release_host: 2949 if (shost) 2950 scsi_host_put(shost); 2951 return err; 2952 } 2953 2954 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2955 u64 ep_handle) 2956 { 2957 struct iscsi_cls_conn *conn; 2958 struct iscsi_endpoint *ep; 2959 2960 if (!transport->ep_disconnect) 2961 return -EINVAL; 2962 2963 ep = iscsi_lookup_endpoint(ep_handle); 2964 if (!ep) 2965 return -EINVAL; 2966 conn = ep->conn; 2967 if (conn) { 2968 mutex_lock(&conn->ep_mutex); 2969 conn->ep = NULL; 2970 mutex_unlock(&conn->ep_mutex); 2971 conn->state = ISCSI_CONN_DOWN; 2972 } 2973 2974 transport->ep_disconnect(ep); 2975 return 0; 2976 } 2977 2978 static int 2979 iscsi_if_transport_ep(struct iscsi_transport *transport, 2980 struct iscsi_uevent *ev, int msg_type) 2981 { 2982 struct iscsi_endpoint *ep; 2983 int rc = 0; 2984 2985 switch (msg_type) { 2986 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2987 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2988 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2989 break; 2990 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2991 if (!transport->ep_poll) 2992 return -EINVAL; 2993 2994 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2995 if (!ep) 2996 return -EINVAL; 2997 2998 ev->r.retcode = transport->ep_poll(ep, 2999 ev->u.ep_poll.timeout_ms); 3000 break; 3001 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3002 rc = iscsi_if_ep_disconnect(transport, 3003 ev->u.ep_disconnect.ep_handle); 3004 break; 3005 } 3006 return rc; 3007 } 3008 3009 static int 3010 iscsi_tgt_dscvr(struct iscsi_transport *transport, 3011 struct iscsi_uevent *ev) 3012 { 3013 struct Scsi_Host *shost; 3014 struct sockaddr *dst_addr; 3015 int err; 3016 3017 if (!transport->tgt_dscvr) 3018 return -EINVAL; 3019 3020 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3021 if (!shost) { 3022 printk(KERN_ERR "target discovery could not find host no %u\n", 3023 ev->u.tgt_dscvr.host_no); 3024 return -ENODEV; 3025 } 3026 3027 3028 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3029 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3030 ev->u.tgt_dscvr.enable, dst_addr); 3031 scsi_host_put(shost); 3032 return err; 3033 } 3034 3035 static int 3036 iscsi_set_host_param(struct iscsi_transport *transport, 3037 struct iscsi_uevent *ev) 3038 { 3039 char *data = (char*)ev + sizeof(*ev); 3040 struct Scsi_Host *shost; 3041 int err; 3042 3043 if (!transport->set_host_param) 3044 return -ENOSYS; 3045 3046 if (ev->u.set_host_param.len > PAGE_SIZE) 3047 return -EINVAL; 3048 3049 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3050 if (!shost) { 3051 printk(KERN_ERR "set_host_param could not find host no %u\n", 3052 ev->u.set_host_param.host_no); 3053 return -ENODEV; 3054 } 3055 3056 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3057 data, ev->u.set_host_param.len); 3058 scsi_host_put(shost); 3059 return err; 3060 } 3061 3062 static int 3063 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3064 { 3065 struct Scsi_Host *shost; 3066 struct iscsi_path *params; 3067 int err; 3068 3069 if (!transport->set_path) 3070 return -ENOSYS; 3071 3072 shost = scsi_host_lookup(ev->u.set_path.host_no); 3073 if (!shost) { 3074 printk(KERN_ERR "set path could not find host no %u\n", 3075 ev->u.set_path.host_no); 3076 return -ENODEV; 3077 } 3078 3079 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3080 err = transport->set_path(shost, params); 3081 3082 scsi_host_put(shost); 3083 return err; 3084 } 3085 3086 static int iscsi_session_has_conns(int sid) 3087 { 3088 struct iscsi_cls_conn *conn; 3089 unsigned long flags; 3090 int found = 0; 3091 3092 spin_lock_irqsave(&connlock, flags); 3093 list_for_each_entry(conn, &connlist, conn_list) { 3094 if (iscsi_conn_get_sid(conn) == sid) { 3095 found = 1; 3096 break; 3097 } 3098 } 3099 spin_unlock_irqrestore(&connlock, flags); 3100 3101 return found; 3102 } 3103 3104 static int 3105 iscsi_set_iface_params(struct iscsi_transport *transport, 3106 struct iscsi_uevent *ev, uint32_t len) 3107 { 3108 char *data = (char *)ev + sizeof(*ev); 3109 struct Scsi_Host *shost; 3110 int err; 3111 3112 if (!transport->set_iface_param) 3113 return -ENOSYS; 3114 3115 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3116 if (!shost) { 3117 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3118 ev->u.set_iface_params.host_no); 3119 return -ENODEV; 3120 } 3121 3122 err = transport->set_iface_param(shost, data, len); 3123 scsi_host_put(shost); 3124 return err; 3125 } 3126 3127 static int 3128 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3129 { 3130 struct Scsi_Host *shost; 3131 struct sockaddr *dst_addr; 3132 int err; 3133 3134 if (!transport->send_ping) 3135 return -ENOSYS; 3136 3137 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3138 if (!shost) { 3139 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3140 ev->u.iscsi_ping.host_no); 3141 return -ENODEV; 3142 } 3143 3144 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3145 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3146 ev->u.iscsi_ping.iface_type, 3147 ev->u.iscsi_ping.payload_size, 3148 ev->u.iscsi_ping.pid, 3149 dst_addr); 3150 scsi_host_put(shost); 3151 return err; 3152 } 3153 3154 static int 3155 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3156 { 3157 struct iscsi_uevent *ev = nlmsg_data(nlh); 3158 struct Scsi_Host *shost = NULL; 3159 struct iscsi_chap_rec *chap_rec; 3160 struct iscsi_internal *priv; 3161 struct sk_buff *skbchap; 3162 struct nlmsghdr *nlhchap; 3163 struct iscsi_uevent *evchap; 3164 uint32_t chap_buf_size; 3165 int len, err = 0; 3166 char *buf; 3167 3168 if (!transport->get_chap) 3169 return -EINVAL; 3170 3171 priv = iscsi_if_transport_lookup(transport); 3172 if (!priv) 3173 return -EINVAL; 3174 3175 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3176 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3177 3178 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3179 if (!shost) { 3180 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3181 __func__, ev->u.get_chap.host_no); 3182 return -ENODEV; 3183 } 3184 3185 do { 3186 int actual_size; 3187 3188 skbchap = alloc_skb(len, GFP_KERNEL); 3189 if (!skbchap) { 3190 printk(KERN_ERR "can not deliver chap: OOM\n"); 3191 err = -ENOMEM; 3192 goto exit_get_chap; 3193 } 3194 3195 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3196 (len - sizeof(*nlhchap)), 0); 3197 evchap = nlmsg_data(nlhchap); 3198 memset(evchap, 0, sizeof(*evchap)); 3199 evchap->transport_handle = iscsi_handle(transport); 3200 evchap->type = nlh->nlmsg_type; 3201 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3202 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3203 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3204 buf = (char *)evchap + sizeof(*evchap); 3205 memset(buf, 0, chap_buf_size); 3206 3207 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3208 &evchap->u.get_chap.num_entries, buf); 3209 3210 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3211 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3212 nlhchap->nlmsg_len = actual_size; 3213 3214 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3215 GFP_KERNEL); 3216 } while (err < 0 && err != -ECONNREFUSED); 3217 3218 exit_get_chap: 3219 scsi_host_put(shost); 3220 return err; 3221 } 3222 3223 static int iscsi_set_chap(struct iscsi_transport *transport, 3224 struct iscsi_uevent *ev, uint32_t len) 3225 { 3226 char *data = (char *)ev + sizeof(*ev); 3227 struct Scsi_Host *shost; 3228 int err = 0; 3229 3230 if (!transport->set_chap) 3231 return -ENOSYS; 3232 3233 shost = scsi_host_lookup(ev->u.set_path.host_no); 3234 if (!shost) { 3235 pr_err("%s could not find host no %u\n", 3236 __func__, ev->u.set_path.host_no); 3237 return -ENODEV; 3238 } 3239 3240 err = transport->set_chap(shost, data, len); 3241 scsi_host_put(shost); 3242 return err; 3243 } 3244 3245 static int iscsi_delete_chap(struct iscsi_transport *transport, 3246 struct iscsi_uevent *ev) 3247 { 3248 struct Scsi_Host *shost; 3249 int err = 0; 3250 3251 if (!transport->delete_chap) 3252 return -ENOSYS; 3253 3254 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3255 if (!shost) { 3256 printk(KERN_ERR "%s could not find host no %u\n", 3257 __func__, ev->u.delete_chap.host_no); 3258 return -ENODEV; 3259 } 3260 3261 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3262 scsi_host_put(shost); 3263 return err; 3264 } 3265 3266 static const struct { 3267 enum iscsi_discovery_parent_type value; 3268 char *name; 3269 } iscsi_discovery_parent_names[] = { 3270 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3271 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3272 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3273 }; 3274 3275 char *iscsi_get_discovery_parent_name(int parent_type) 3276 { 3277 int i; 3278 char *state = "Unknown!"; 3279 3280 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3281 if (iscsi_discovery_parent_names[i].value & parent_type) { 3282 state = iscsi_discovery_parent_names[i].name; 3283 break; 3284 } 3285 } 3286 return state; 3287 } 3288 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3289 3290 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3291 struct iscsi_uevent *ev, uint32_t len) 3292 { 3293 char *data = (char *)ev + sizeof(*ev); 3294 struct Scsi_Host *shost; 3295 struct iscsi_bus_flash_session *fnode_sess; 3296 struct iscsi_bus_flash_conn *fnode_conn; 3297 struct device *dev; 3298 uint32_t idx; 3299 int err = 0; 3300 3301 if (!transport->set_flashnode_param) { 3302 err = -ENOSYS; 3303 goto exit_set_fnode; 3304 } 3305 3306 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3307 if (!shost) { 3308 pr_err("%s could not find host no %u\n", 3309 __func__, ev->u.set_flashnode.host_no); 3310 err = -ENODEV; 3311 goto exit_set_fnode; 3312 } 3313 3314 idx = ev->u.set_flashnode.flashnode_idx; 3315 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3316 if (!fnode_sess) { 3317 pr_err("%s could not find flashnode %u for host no %u\n", 3318 __func__, idx, ev->u.set_flashnode.host_no); 3319 err = -ENODEV; 3320 goto put_host; 3321 } 3322 3323 dev = iscsi_find_flashnode_conn(fnode_sess); 3324 if (!dev) { 3325 err = -ENODEV; 3326 goto put_sess; 3327 } 3328 3329 fnode_conn = iscsi_dev_to_flash_conn(dev); 3330 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3331 put_device(dev); 3332 3333 put_sess: 3334 put_device(&fnode_sess->dev); 3335 3336 put_host: 3337 scsi_host_put(shost); 3338 3339 exit_set_fnode: 3340 return err; 3341 } 3342 3343 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3344 struct iscsi_uevent *ev, uint32_t len) 3345 { 3346 char *data = (char *)ev + sizeof(*ev); 3347 struct Scsi_Host *shost; 3348 int index; 3349 int err = 0; 3350 3351 if (!transport->new_flashnode) { 3352 err = -ENOSYS; 3353 goto exit_new_fnode; 3354 } 3355 3356 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3357 if (!shost) { 3358 pr_err("%s could not find host no %u\n", 3359 __func__, ev->u.new_flashnode.host_no); 3360 err = -ENODEV; 3361 goto put_host; 3362 } 3363 3364 index = transport->new_flashnode(shost, data, len); 3365 3366 if (index >= 0) 3367 ev->r.new_flashnode_ret.flashnode_idx = index; 3368 else 3369 err = -EIO; 3370 3371 put_host: 3372 scsi_host_put(shost); 3373 3374 exit_new_fnode: 3375 return err; 3376 } 3377 3378 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3379 struct iscsi_uevent *ev) 3380 { 3381 struct Scsi_Host *shost; 3382 struct iscsi_bus_flash_session *fnode_sess; 3383 uint32_t idx; 3384 int err = 0; 3385 3386 if (!transport->del_flashnode) { 3387 err = -ENOSYS; 3388 goto exit_del_fnode; 3389 } 3390 3391 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3392 if (!shost) { 3393 pr_err("%s could not find host no %u\n", 3394 __func__, ev->u.del_flashnode.host_no); 3395 err = -ENODEV; 3396 goto put_host; 3397 } 3398 3399 idx = ev->u.del_flashnode.flashnode_idx; 3400 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3401 if (!fnode_sess) { 3402 pr_err("%s could not find flashnode %u for host no %u\n", 3403 __func__, idx, ev->u.del_flashnode.host_no); 3404 err = -ENODEV; 3405 goto put_host; 3406 } 3407 3408 err = transport->del_flashnode(fnode_sess); 3409 put_device(&fnode_sess->dev); 3410 3411 put_host: 3412 scsi_host_put(shost); 3413 3414 exit_del_fnode: 3415 return err; 3416 } 3417 3418 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3419 struct iscsi_uevent *ev) 3420 { 3421 struct Scsi_Host *shost; 3422 struct iscsi_bus_flash_session *fnode_sess; 3423 struct iscsi_bus_flash_conn *fnode_conn; 3424 struct device *dev; 3425 uint32_t idx; 3426 int err = 0; 3427 3428 if (!transport->login_flashnode) { 3429 err = -ENOSYS; 3430 goto exit_login_fnode; 3431 } 3432 3433 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3434 if (!shost) { 3435 pr_err("%s could not find host no %u\n", 3436 __func__, ev->u.login_flashnode.host_no); 3437 err = -ENODEV; 3438 goto put_host; 3439 } 3440 3441 idx = ev->u.login_flashnode.flashnode_idx; 3442 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3443 if (!fnode_sess) { 3444 pr_err("%s could not find flashnode %u for host no %u\n", 3445 __func__, idx, ev->u.login_flashnode.host_no); 3446 err = -ENODEV; 3447 goto put_host; 3448 } 3449 3450 dev = iscsi_find_flashnode_conn(fnode_sess); 3451 if (!dev) { 3452 err = -ENODEV; 3453 goto put_sess; 3454 } 3455 3456 fnode_conn = iscsi_dev_to_flash_conn(dev); 3457 err = transport->login_flashnode(fnode_sess, fnode_conn); 3458 put_device(dev); 3459 3460 put_sess: 3461 put_device(&fnode_sess->dev); 3462 3463 put_host: 3464 scsi_host_put(shost); 3465 3466 exit_login_fnode: 3467 return err; 3468 } 3469 3470 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3471 struct iscsi_uevent *ev) 3472 { 3473 struct Scsi_Host *shost; 3474 struct iscsi_bus_flash_session *fnode_sess; 3475 struct iscsi_bus_flash_conn *fnode_conn; 3476 struct device *dev; 3477 uint32_t idx; 3478 int err = 0; 3479 3480 if (!transport->logout_flashnode) { 3481 err = -ENOSYS; 3482 goto exit_logout_fnode; 3483 } 3484 3485 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3486 if (!shost) { 3487 pr_err("%s could not find host no %u\n", 3488 __func__, ev->u.logout_flashnode.host_no); 3489 err = -ENODEV; 3490 goto put_host; 3491 } 3492 3493 idx = ev->u.logout_flashnode.flashnode_idx; 3494 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3495 if (!fnode_sess) { 3496 pr_err("%s could not find flashnode %u for host no %u\n", 3497 __func__, idx, ev->u.logout_flashnode.host_no); 3498 err = -ENODEV; 3499 goto put_host; 3500 } 3501 3502 dev = iscsi_find_flashnode_conn(fnode_sess); 3503 if (!dev) { 3504 err = -ENODEV; 3505 goto put_sess; 3506 } 3507 3508 fnode_conn = iscsi_dev_to_flash_conn(dev); 3509 3510 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3511 put_device(dev); 3512 3513 put_sess: 3514 put_device(&fnode_sess->dev); 3515 3516 put_host: 3517 scsi_host_put(shost); 3518 3519 exit_logout_fnode: 3520 return err; 3521 } 3522 3523 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3524 struct iscsi_uevent *ev) 3525 { 3526 struct Scsi_Host *shost; 3527 struct iscsi_cls_session *session; 3528 int err = 0; 3529 3530 if (!transport->logout_flashnode_sid) { 3531 err = -ENOSYS; 3532 goto exit_logout_sid; 3533 } 3534 3535 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3536 if (!shost) { 3537 pr_err("%s could not find host no %u\n", 3538 __func__, ev->u.logout_flashnode.host_no); 3539 err = -ENODEV; 3540 goto put_host; 3541 } 3542 3543 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3544 if (!session) { 3545 pr_err("%s could not find session id %u\n", 3546 __func__, ev->u.logout_flashnode_sid.sid); 3547 err = -EINVAL; 3548 goto put_host; 3549 } 3550 3551 err = transport->logout_flashnode_sid(session); 3552 3553 put_host: 3554 scsi_host_put(shost); 3555 3556 exit_logout_sid: 3557 return err; 3558 } 3559 3560 static int 3561 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3562 { 3563 struct iscsi_uevent *ev = nlmsg_data(nlh); 3564 struct Scsi_Host *shost = NULL; 3565 struct iscsi_internal *priv; 3566 struct sk_buff *skbhost_stats; 3567 struct nlmsghdr *nlhhost_stats; 3568 struct iscsi_uevent *evhost_stats; 3569 int host_stats_size = 0; 3570 int len, err = 0; 3571 char *buf; 3572 3573 if (!transport->get_host_stats) 3574 return -ENOSYS; 3575 3576 priv = iscsi_if_transport_lookup(transport); 3577 if (!priv) 3578 return -EINVAL; 3579 3580 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3581 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3582 3583 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3584 if (!shost) { 3585 pr_err("%s: failed. Could not find host no %u\n", 3586 __func__, ev->u.get_host_stats.host_no); 3587 return -ENODEV; 3588 } 3589 3590 do { 3591 int actual_size; 3592 3593 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3594 if (!skbhost_stats) { 3595 pr_err("cannot deliver host stats: OOM\n"); 3596 err = -ENOMEM; 3597 goto exit_host_stats; 3598 } 3599 3600 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3601 (len - sizeof(*nlhhost_stats)), 0); 3602 evhost_stats = nlmsg_data(nlhhost_stats); 3603 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3604 evhost_stats->transport_handle = iscsi_handle(transport); 3605 evhost_stats->type = nlh->nlmsg_type; 3606 evhost_stats->u.get_host_stats.host_no = 3607 ev->u.get_host_stats.host_no; 3608 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3609 memset(buf, 0, host_stats_size); 3610 3611 err = transport->get_host_stats(shost, buf, host_stats_size); 3612 if (err) { 3613 kfree_skb(skbhost_stats); 3614 goto exit_host_stats; 3615 } 3616 3617 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3618 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3619 nlhhost_stats->nlmsg_len = actual_size; 3620 3621 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3622 GFP_KERNEL); 3623 } while (err < 0 && err != -ECONNREFUSED); 3624 3625 exit_host_stats: 3626 scsi_host_put(shost); 3627 return err; 3628 } 3629 3630 3631 static int 3632 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3633 { 3634 int err = 0; 3635 u32 portid; 3636 u32 pdu_len; 3637 struct iscsi_uevent *ev = nlmsg_data(nlh); 3638 struct iscsi_transport *transport = NULL; 3639 struct iscsi_internal *priv; 3640 struct iscsi_cls_session *session; 3641 struct iscsi_cls_conn *conn; 3642 struct iscsi_endpoint *ep = NULL; 3643 3644 if (!netlink_capable(skb, CAP_SYS_ADMIN)) 3645 return -EPERM; 3646 3647 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3648 *group = ISCSI_NL_GRP_UIP; 3649 else 3650 *group = ISCSI_NL_GRP_ISCSID; 3651 3652 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3653 if (!priv) 3654 return -EINVAL; 3655 transport = priv->iscsi_transport; 3656 3657 if (!try_module_get(transport->owner)) 3658 return -EINVAL; 3659 3660 portid = NETLINK_CB(skb).portid; 3661 3662 switch (nlh->nlmsg_type) { 3663 case ISCSI_UEVENT_CREATE_SESSION: 3664 err = iscsi_if_create_session(priv, ep, ev, 3665 portid, 3666 ev->u.c_session.initial_cmdsn, 3667 ev->u.c_session.cmds_max, 3668 ev->u.c_session.queue_depth); 3669 break; 3670 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3671 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3672 if (!ep) { 3673 err = -EINVAL; 3674 break; 3675 } 3676 3677 err = iscsi_if_create_session(priv, ep, ev, 3678 portid, 3679 ev->u.c_bound_session.initial_cmdsn, 3680 ev->u.c_bound_session.cmds_max, 3681 ev->u.c_bound_session.queue_depth); 3682 break; 3683 case ISCSI_UEVENT_DESTROY_SESSION: 3684 session = iscsi_session_lookup(ev->u.d_session.sid); 3685 if (!session) 3686 err = -EINVAL; 3687 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3688 err = -EBUSY; 3689 else 3690 transport->destroy_session(session); 3691 break; 3692 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3693 session = iscsi_session_lookup(ev->u.d_session.sid); 3694 if (!session) 3695 err = -EINVAL; 3696 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3697 err = -EBUSY; 3698 else { 3699 unsigned long flags; 3700 3701 /* Prevent this session from being found again */ 3702 spin_lock_irqsave(&sesslock, flags); 3703 list_del_init(&session->sess_list); 3704 spin_unlock_irqrestore(&sesslock, flags); 3705 3706 queue_work(iscsi_destroy_workq, &session->destroy_work); 3707 } 3708 break; 3709 case ISCSI_UEVENT_UNBIND_SESSION: 3710 session = iscsi_session_lookup(ev->u.d_session.sid); 3711 if (session) 3712 scsi_queue_work(iscsi_session_to_shost(session), 3713 &session->unbind_work); 3714 else 3715 err = -EINVAL; 3716 break; 3717 case ISCSI_UEVENT_CREATE_CONN: 3718 err = iscsi_if_create_conn(transport, ev); 3719 break; 3720 case ISCSI_UEVENT_DESTROY_CONN: 3721 err = iscsi_if_destroy_conn(transport, ev); 3722 break; 3723 case ISCSI_UEVENT_BIND_CONN: 3724 session = iscsi_session_lookup(ev->u.b_conn.sid); 3725 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3726 3727 if (conn && conn->ep) 3728 iscsi_if_ep_disconnect(transport, conn->ep->id); 3729 3730 if (!session || !conn) { 3731 err = -EINVAL; 3732 break; 3733 } 3734 3735 mutex_lock(&conn_mutex); 3736 ev->r.retcode = transport->bind_conn(session, conn, 3737 ev->u.b_conn.transport_eph, 3738 ev->u.b_conn.is_leading); 3739 if (!ev->r.retcode) 3740 conn->state = ISCSI_CONN_BOUND; 3741 mutex_unlock(&conn_mutex); 3742 3743 if (ev->r.retcode || !transport->ep_connect) 3744 break; 3745 3746 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3747 if (ep) { 3748 ep->conn = conn; 3749 3750 mutex_lock(&conn->ep_mutex); 3751 conn->ep = ep; 3752 mutex_unlock(&conn->ep_mutex); 3753 } else 3754 iscsi_cls_conn_printk(KERN_ERR, conn, 3755 "Could not set ep conn " 3756 "binding\n"); 3757 break; 3758 case ISCSI_UEVENT_SET_PARAM: 3759 err = iscsi_set_param(transport, ev); 3760 break; 3761 case ISCSI_UEVENT_START_CONN: 3762 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3763 if (conn) { 3764 mutex_lock(&conn_mutex); 3765 ev->r.retcode = transport->start_conn(conn); 3766 if (!ev->r.retcode) 3767 conn->state = ISCSI_CONN_UP; 3768 mutex_unlock(&conn_mutex); 3769 } 3770 else 3771 err = -EINVAL; 3772 break; 3773 case ISCSI_UEVENT_STOP_CONN: 3774 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3775 if (conn) 3776 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3777 else 3778 err = -EINVAL; 3779 break; 3780 case ISCSI_UEVENT_SEND_PDU: 3781 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev); 3782 3783 if ((ev->u.send_pdu.hdr_size > pdu_len) || 3784 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) { 3785 err = -EINVAL; 3786 break; 3787 } 3788 3789 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3790 if (conn) { 3791 mutex_lock(&conn_mutex); 3792 ev->r.retcode = transport->send_pdu(conn, 3793 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3794 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3795 ev->u.send_pdu.data_size); 3796 mutex_unlock(&conn_mutex); 3797 } 3798 else 3799 err = -EINVAL; 3800 break; 3801 case ISCSI_UEVENT_GET_STATS: 3802 err = iscsi_if_get_stats(transport, nlh); 3803 break; 3804 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3805 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3806 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3807 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3808 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3809 break; 3810 case ISCSI_UEVENT_TGT_DSCVR: 3811 err = iscsi_tgt_dscvr(transport, ev); 3812 break; 3813 case ISCSI_UEVENT_SET_HOST_PARAM: 3814 err = iscsi_set_host_param(transport, ev); 3815 break; 3816 case ISCSI_UEVENT_PATH_UPDATE: 3817 err = iscsi_set_path(transport, ev); 3818 break; 3819 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3820 err = iscsi_set_iface_params(transport, ev, 3821 nlmsg_attrlen(nlh, sizeof(*ev))); 3822 break; 3823 case ISCSI_UEVENT_PING: 3824 err = iscsi_send_ping(transport, ev); 3825 break; 3826 case ISCSI_UEVENT_GET_CHAP: 3827 err = iscsi_get_chap(transport, nlh); 3828 break; 3829 case ISCSI_UEVENT_DELETE_CHAP: 3830 err = iscsi_delete_chap(transport, ev); 3831 break; 3832 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3833 err = iscsi_set_flashnode_param(transport, ev, 3834 nlmsg_attrlen(nlh, 3835 sizeof(*ev))); 3836 break; 3837 case ISCSI_UEVENT_NEW_FLASHNODE: 3838 err = iscsi_new_flashnode(transport, ev, 3839 nlmsg_attrlen(nlh, sizeof(*ev))); 3840 break; 3841 case ISCSI_UEVENT_DEL_FLASHNODE: 3842 err = iscsi_del_flashnode(transport, ev); 3843 break; 3844 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3845 err = iscsi_login_flashnode(transport, ev); 3846 break; 3847 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3848 err = iscsi_logout_flashnode(transport, ev); 3849 break; 3850 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3851 err = iscsi_logout_flashnode_sid(transport, ev); 3852 break; 3853 case ISCSI_UEVENT_SET_CHAP: 3854 err = iscsi_set_chap(transport, ev, 3855 nlmsg_attrlen(nlh, sizeof(*ev))); 3856 break; 3857 case ISCSI_UEVENT_GET_HOST_STATS: 3858 err = iscsi_get_host_stats(transport, nlh); 3859 break; 3860 default: 3861 err = -ENOSYS; 3862 break; 3863 } 3864 3865 module_put(transport->owner); 3866 return err; 3867 } 3868 3869 /* 3870 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3871 * Malformed skbs with wrong lengths or invalid creds are not processed. 3872 */ 3873 static void 3874 iscsi_if_rx(struct sk_buff *skb) 3875 { 3876 u32 portid = NETLINK_CB(skb).portid; 3877 3878 mutex_lock(&rx_queue_mutex); 3879 while (skb->len >= NLMSG_HDRLEN) { 3880 int err; 3881 uint32_t rlen; 3882 struct nlmsghdr *nlh; 3883 struct iscsi_uevent *ev; 3884 uint32_t group; 3885 int retries = ISCSI_SEND_MAX_ALLOWED; 3886 3887 nlh = nlmsg_hdr(skb); 3888 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3889 skb->len < nlh->nlmsg_len) { 3890 break; 3891 } 3892 3893 ev = nlmsg_data(nlh); 3894 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3895 if (rlen > skb->len) 3896 rlen = skb->len; 3897 3898 err = iscsi_if_recv_msg(skb, nlh, &group); 3899 if (err) { 3900 ev->type = ISCSI_KEVENT_IF_ERROR; 3901 ev->iferror = err; 3902 } 3903 do { 3904 /* 3905 * special case for GET_STATS: 3906 * on success - sending reply and stats from 3907 * inside of if_recv_msg(), 3908 * on error - fall through. 3909 */ 3910 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3911 break; 3912 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3913 break; 3914 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3915 ev, sizeof(*ev)); 3916 if (err == -EAGAIN && --retries < 0) { 3917 printk(KERN_WARNING "Send reply failed, error %d\n", err); 3918 break; 3919 } 3920 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3921 skb_pull(skb, rlen); 3922 } 3923 mutex_unlock(&rx_queue_mutex); 3924 } 3925 3926 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3927 struct device_attribute dev_attr_##_prefix##_##_name = \ 3928 __ATTR(_name,_mode,_show,_store) 3929 3930 /* 3931 * iSCSI connection attrs 3932 */ 3933 #define iscsi_conn_attr_show(param) \ 3934 static ssize_t \ 3935 show_conn_param_##param(struct device *dev, \ 3936 struct device_attribute *attr, char *buf) \ 3937 { \ 3938 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3939 struct iscsi_transport *t = conn->transport; \ 3940 return t->get_conn_param(conn, param, buf); \ 3941 } 3942 3943 #define iscsi_conn_attr(field, param) \ 3944 iscsi_conn_attr_show(param) \ 3945 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3946 NULL); 3947 3948 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3949 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3950 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3951 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3952 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3953 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3954 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3955 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3956 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3957 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3958 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3959 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3960 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3961 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3962 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3963 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3964 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3965 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3966 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3967 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3968 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3969 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3970 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3971 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3972 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3973 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3974 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3975 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3976 3977 static const char *const connection_state_names[] = { 3978 [ISCSI_CONN_UP] = "up", 3979 [ISCSI_CONN_DOWN] = "down", 3980 [ISCSI_CONN_FAILED] = "failed", 3981 [ISCSI_CONN_BOUND] = "bound" 3982 }; 3983 3984 static ssize_t show_conn_state(struct device *dev, 3985 struct device_attribute *attr, char *buf) 3986 { 3987 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 3988 const char *state = "unknown"; 3989 3990 if (conn->state >= 0 && 3991 conn->state < ARRAY_SIZE(connection_state_names)) 3992 state = connection_state_names[conn->state]; 3993 3994 return sysfs_emit(buf, "%s\n", state); 3995 } 3996 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 3997 NULL); 3998 3999 #define iscsi_conn_ep_attr_show(param) \ 4000 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 4001 struct device_attribute *attr,\ 4002 char *buf) \ 4003 { \ 4004 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4005 struct iscsi_transport *t = conn->transport; \ 4006 struct iscsi_endpoint *ep; \ 4007 ssize_t rc; \ 4008 \ 4009 /* \ 4010 * Need to make sure ep_disconnect does not free the LLD's \ 4011 * interconnect resources while we are trying to read them. \ 4012 */ \ 4013 mutex_lock(&conn->ep_mutex); \ 4014 ep = conn->ep; \ 4015 if (!ep && t->ep_connect) { \ 4016 mutex_unlock(&conn->ep_mutex); \ 4017 return -ENOTCONN; \ 4018 } \ 4019 \ 4020 if (ep) \ 4021 rc = t->get_ep_param(ep, param, buf); \ 4022 else \ 4023 rc = t->get_conn_param(conn, param, buf); \ 4024 mutex_unlock(&conn->ep_mutex); \ 4025 return rc; \ 4026 } 4027 4028 #define iscsi_conn_ep_attr(field, param) \ 4029 iscsi_conn_ep_attr_show(param) \ 4030 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4031 show_conn_ep_param_##param, NULL); 4032 4033 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4034 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4035 4036 static struct attribute *iscsi_conn_attrs[] = { 4037 &dev_attr_conn_max_recv_dlength.attr, 4038 &dev_attr_conn_max_xmit_dlength.attr, 4039 &dev_attr_conn_header_digest.attr, 4040 &dev_attr_conn_data_digest.attr, 4041 &dev_attr_conn_ifmarker.attr, 4042 &dev_attr_conn_ofmarker.attr, 4043 &dev_attr_conn_address.attr, 4044 &dev_attr_conn_port.attr, 4045 &dev_attr_conn_exp_statsn.attr, 4046 &dev_attr_conn_persistent_address.attr, 4047 &dev_attr_conn_persistent_port.attr, 4048 &dev_attr_conn_ping_tmo.attr, 4049 &dev_attr_conn_recv_tmo.attr, 4050 &dev_attr_conn_local_port.attr, 4051 &dev_attr_conn_statsn.attr, 4052 &dev_attr_conn_keepalive_tmo.attr, 4053 &dev_attr_conn_max_segment_size.attr, 4054 &dev_attr_conn_tcp_timestamp_stat.attr, 4055 &dev_attr_conn_tcp_wsf_disable.attr, 4056 &dev_attr_conn_tcp_nagle_disable.attr, 4057 &dev_attr_conn_tcp_timer_scale.attr, 4058 &dev_attr_conn_tcp_timestamp_enable.attr, 4059 &dev_attr_conn_fragment_disable.attr, 4060 &dev_attr_conn_ipv4_tos.attr, 4061 &dev_attr_conn_ipv6_traffic_class.attr, 4062 &dev_attr_conn_ipv6_flow_label.attr, 4063 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4064 &dev_attr_conn_tcp_xmit_wsf.attr, 4065 &dev_attr_conn_tcp_recv_wsf.attr, 4066 &dev_attr_conn_local_ipaddr.attr, 4067 &dev_attr_conn_state.attr, 4068 NULL, 4069 }; 4070 4071 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4072 struct attribute *attr, int i) 4073 { 4074 struct device *cdev = container_of(kobj, struct device, kobj); 4075 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4076 struct iscsi_transport *t = conn->transport; 4077 int param; 4078 4079 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4080 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4081 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4082 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4083 else if (attr == &dev_attr_conn_header_digest.attr) 4084 param = ISCSI_PARAM_HDRDGST_EN; 4085 else if (attr == &dev_attr_conn_data_digest.attr) 4086 param = ISCSI_PARAM_DATADGST_EN; 4087 else if (attr == &dev_attr_conn_ifmarker.attr) 4088 param = ISCSI_PARAM_IFMARKER_EN; 4089 else if (attr == &dev_attr_conn_ofmarker.attr) 4090 param = ISCSI_PARAM_OFMARKER_EN; 4091 else if (attr == &dev_attr_conn_address.attr) 4092 param = ISCSI_PARAM_CONN_ADDRESS; 4093 else if (attr == &dev_attr_conn_port.attr) 4094 param = ISCSI_PARAM_CONN_PORT; 4095 else if (attr == &dev_attr_conn_exp_statsn.attr) 4096 param = ISCSI_PARAM_EXP_STATSN; 4097 else if (attr == &dev_attr_conn_persistent_address.attr) 4098 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4099 else if (attr == &dev_attr_conn_persistent_port.attr) 4100 param = ISCSI_PARAM_PERSISTENT_PORT; 4101 else if (attr == &dev_attr_conn_ping_tmo.attr) 4102 param = ISCSI_PARAM_PING_TMO; 4103 else if (attr == &dev_attr_conn_recv_tmo.attr) 4104 param = ISCSI_PARAM_RECV_TMO; 4105 else if (attr == &dev_attr_conn_local_port.attr) 4106 param = ISCSI_PARAM_LOCAL_PORT; 4107 else if (attr == &dev_attr_conn_statsn.attr) 4108 param = ISCSI_PARAM_STATSN; 4109 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4110 param = ISCSI_PARAM_KEEPALIVE_TMO; 4111 else if (attr == &dev_attr_conn_max_segment_size.attr) 4112 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4113 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4114 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4115 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4116 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4117 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4118 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4119 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4120 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4121 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4122 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4123 else if (attr == &dev_attr_conn_fragment_disable.attr) 4124 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4125 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4126 param = ISCSI_PARAM_IPV4_TOS; 4127 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4128 param = ISCSI_PARAM_IPV6_TC; 4129 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4130 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4131 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4132 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4133 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4134 param = ISCSI_PARAM_TCP_XMIT_WSF; 4135 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4136 param = ISCSI_PARAM_TCP_RECV_WSF; 4137 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4138 param = ISCSI_PARAM_LOCAL_IPADDR; 4139 else if (attr == &dev_attr_conn_state.attr) 4140 return S_IRUGO; 4141 else { 4142 WARN_ONCE(1, "Invalid conn attr"); 4143 return 0; 4144 } 4145 4146 return t->attr_is_visible(ISCSI_PARAM, param); 4147 } 4148 4149 static struct attribute_group iscsi_conn_group = { 4150 .attrs = iscsi_conn_attrs, 4151 .is_visible = iscsi_conn_attr_is_visible, 4152 }; 4153 4154 /* 4155 * iSCSI session attrs 4156 */ 4157 #define iscsi_session_attr_show(param, perm) \ 4158 static ssize_t \ 4159 show_session_param_##param(struct device *dev, \ 4160 struct device_attribute *attr, char *buf) \ 4161 { \ 4162 struct iscsi_cls_session *session = \ 4163 iscsi_dev_to_session(dev->parent); \ 4164 struct iscsi_transport *t = session->transport; \ 4165 \ 4166 if (perm && !capable(CAP_SYS_ADMIN)) \ 4167 return -EACCES; \ 4168 return t->get_session_param(session, param, buf); \ 4169 } 4170 4171 #define iscsi_session_attr(field, param, perm) \ 4172 iscsi_session_attr_show(param, perm) \ 4173 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4174 NULL); 4175 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4176 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4177 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4178 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4179 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4180 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4181 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4182 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4183 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4184 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4185 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4186 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4187 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4188 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4189 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4190 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4191 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4192 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4193 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4194 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4195 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4196 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4197 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4198 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4199 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4200 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4201 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4202 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4203 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4204 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4205 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4206 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4207 iscsi_session_attr(discovery_auth_optional, 4208 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4209 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4210 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4211 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4212 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4213 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4214 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4215 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4216 4217 static ssize_t 4218 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4219 char *buf) 4220 { 4221 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4222 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state)); 4223 } 4224 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4225 NULL); 4226 static ssize_t 4227 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4228 char *buf) 4229 { 4230 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4231 return sysfs_emit(buf, "%d\n", session->creator); 4232 } 4233 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4234 NULL); 4235 static ssize_t 4236 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4237 char *buf) 4238 { 4239 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4240 return sysfs_emit(buf, "%d\n", session->target_id); 4241 } 4242 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4243 show_priv_session_target_id, NULL); 4244 4245 #define iscsi_priv_session_attr_show(field, format) \ 4246 static ssize_t \ 4247 show_priv_session_##field(struct device *dev, \ 4248 struct device_attribute *attr, char *buf) \ 4249 { \ 4250 struct iscsi_cls_session *session = \ 4251 iscsi_dev_to_session(dev->parent); \ 4252 if (session->field == -1) \ 4253 return sysfs_emit(buf, "off\n"); \ 4254 return sysfs_emit(buf, format"\n", session->field); \ 4255 } 4256 4257 #define iscsi_priv_session_attr_store(field) \ 4258 static ssize_t \ 4259 store_priv_session_##field(struct device *dev, \ 4260 struct device_attribute *attr, \ 4261 const char *buf, size_t count) \ 4262 { \ 4263 int val; \ 4264 char *cp; \ 4265 struct iscsi_cls_session *session = \ 4266 iscsi_dev_to_session(dev->parent); \ 4267 if ((session->state == ISCSI_SESSION_FREE) || \ 4268 (session->state == ISCSI_SESSION_FAILED)) \ 4269 return -EBUSY; \ 4270 if (strncmp(buf, "off", 3) == 0) { \ 4271 session->field = -1; \ 4272 session->field##_sysfs_override = true; \ 4273 } else { \ 4274 val = simple_strtoul(buf, &cp, 0); \ 4275 if (*cp != '\0' && *cp != '\n') \ 4276 return -EINVAL; \ 4277 session->field = val; \ 4278 session->field##_sysfs_override = true; \ 4279 } \ 4280 return count; \ 4281 } 4282 4283 #define iscsi_priv_session_rw_attr(field, format) \ 4284 iscsi_priv_session_attr_show(field, format) \ 4285 iscsi_priv_session_attr_store(field) \ 4286 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4287 show_priv_session_##field, \ 4288 store_priv_session_##field) 4289 4290 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4291 4292 static struct attribute *iscsi_session_attrs[] = { 4293 &dev_attr_sess_initial_r2t.attr, 4294 &dev_attr_sess_max_outstanding_r2t.attr, 4295 &dev_attr_sess_immediate_data.attr, 4296 &dev_attr_sess_first_burst_len.attr, 4297 &dev_attr_sess_max_burst_len.attr, 4298 &dev_attr_sess_data_pdu_in_order.attr, 4299 &dev_attr_sess_data_seq_in_order.attr, 4300 &dev_attr_sess_erl.attr, 4301 &dev_attr_sess_targetname.attr, 4302 &dev_attr_sess_tpgt.attr, 4303 &dev_attr_sess_password.attr, 4304 &dev_attr_sess_password_in.attr, 4305 &dev_attr_sess_username.attr, 4306 &dev_attr_sess_username_in.attr, 4307 &dev_attr_sess_fast_abort.attr, 4308 &dev_attr_sess_abort_tmo.attr, 4309 &dev_attr_sess_lu_reset_tmo.attr, 4310 &dev_attr_sess_tgt_reset_tmo.attr, 4311 &dev_attr_sess_ifacename.attr, 4312 &dev_attr_sess_initiatorname.attr, 4313 &dev_attr_sess_targetalias.attr, 4314 &dev_attr_sess_boot_root.attr, 4315 &dev_attr_sess_boot_nic.attr, 4316 &dev_attr_sess_boot_target.attr, 4317 &dev_attr_priv_sess_recovery_tmo.attr, 4318 &dev_attr_priv_sess_state.attr, 4319 &dev_attr_priv_sess_creator.attr, 4320 &dev_attr_sess_chap_out_idx.attr, 4321 &dev_attr_sess_chap_in_idx.attr, 4322 &dev_attr_priv_sess_target_id.attr, 4323 &dev_attr_sess_auto_snd_tgt_disable.attr, 4324 &dev_attr_sess_discovery_session.attr, 4325 &dev_attr_sess_portal_type.attr, 4326 &dev_attr_sess_chap_auth.attr, 4327 &dev_attr_sess_discovery_logout.attr, 4328 &dev_attr_sess_bidi_chap.attr, 4329 &dev_attr_sess_discovery_auth_optional.attr, 4330 &dev_attr_sess_def_time2wait.attr, 4331 &dev_attr_sess_def_time2retain.attr, 4332 &dev_attr_sess_isid.attr, 4333 &dev_attr_sess_tsid.attr, 4334 &dev_attr_sess_def_taskmgmt_tmo.attr, 4335 &dev_attr_sess_discovery_parent_idx.attr, 4336 &dev_attr_sess_discovery_parent_type.attr, 4337 NULL, 4338 }; 4339 4340 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4341 struct attribute *attr, int i) 4342 { 4343 struct device *cdev = container_of(kobj, struct device, kobj); 4344 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4345 struct iscsi_transport *t = session->transport; 4346 int param; 4347 4348 if (attr == &dev_attr_sess_initial_r2t.attr) 4349 param = ISCSI_PARAM_INITIAL_R2T_EN; 4350 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4351 param = ISCSI_PARAM_MAX_R2T; 4352 else if (attr == &dev_attr_sess_immediate_data.attr) 4353 param = ISCSI_PARAM_IMM_DATA_EN; 4354 else if (attr == &dev_attr_sess_first_burst_len.attr) 4355 param = ISCSI_PARAM_FIRST_BURST; 4356 else if (attr == &dev_attr_sess_max_burst_len.attr) 4357 param = ISCSI_PARAM_MAX_BURST; 4358 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4359 param = ISCSI_PARAM_PDU_INORDER_EN; 4360 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4361 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4362 else if (attr == &dev_attr_sess_erl.attr) 4363 param = ISCSI_PARAM_ERL; 4364 else if (attr == &dev_attr_sess_targetname.attr) 4365 param = ISCSI_PARAM_TARGET_NAME; 4366 else if (attr == &dev_attr_sess_tpgt.attr) 4367 param = ISCSI_PARAM_TPGT; 4368 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4369 param = ISCSI_PARAM_CHAP_IN_IDX; 4370 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4371 param = ISCSI_PARAM_CHAP_OUT_IDX; 4372 else if (attr == &dev_attr_sess_password.attr) 4373 param = ISCSI_PARAM_USERNAME; 4374 else if (attr == &dev_attr_sess_password_in.attr) 4375 param = ISCSI_PARAM_USERNAME_IN; 4376 else if (attr == &dev_attr_sess_username.attr) 4377 param = ISCSI_PARAM_PASSWORD; 4378 else if (attr == &dev_attr_sess_username_in.attr) 4379 param = ISCSI_PARAM_PASSWORD_IN; 4380 else if (attr == &dev_attr_sess_fast_abort.attr) 4381 param = ISCSI_PARAM_FAST_ABORT; 4382 else if (attr == &dev_attr_sess_abort_tmo.attr) 4383 param = ISCSI_PARAM_ABORT_TMO; 4384 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4385 param = ISCSI_PARAM_LU_RESET_TMO; 4386 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4387 param = ISCSI_PARAM_TGT_RESET_TMO; 4388 else if (attr == &dev_attr_sess_ifacename.attr) 4389 param = ISCSI_PARAM_IFACE_NAME; 4390 else if (attr == &dev_attr_sess_initiatorname.attr) 4391 param = ISCSI_PARAM_INITIATOR_NAME; 4392 else if (attr == &dev_attr_sess_targetalias.attr) 4393 param = ISCSI_PARAM_TARGET_ALIAS; 4394 else if (attr == &dev_attr_sess_boot_root.attr) 4395 param = ISCSI_PARAM_BOOT_ROOT; 4396 else if (attr == &dev_attr_sess_boot_nic.attr) 4397 param = ISCSI_PARAM_BOOT_NIC; 4398 else if (attr == &dev_attr_sess_boot_target.attr) 4399 param = ISCSI_PARAM_BOOT_TARGET; 4400 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4401 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4402 else if (attr == &dev_attr_sess_discovery_session.attr) 4403 param = ISCSI_PARAM_DISCOVERY_SESS; 4404 else if (attr == &dev_attr_sess_portal_type.attr) 4405 param = ISCSI_PARAM_PORTAL_TYPE; 4406 else if (attr == &dev_attr_sess_chap_auth.attr) 4407 param = ISCSI_PARAM_CHAP_AUTH_EN; 4408 else if (attr == &dev_attr_sess_discovery_logout.attr) 4409 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4410 else if (attr == &dev_attr_sess_bidi_chap.attr) 4411 param = ISCSI_PARAM_BIDI_CHAP_EN; 4412 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4413 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4414 else if (attr == &dev_attr_sess_def_time2wait.attr) 4415 param = ISCSI_PARAM_DEF_TIME2WAIT; 4416 else if (attr == &dev_attr_sess_def_time2retain.attr) 4417 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4418 else if (attr == &dev_attr_sess_isid.attr) 4419 param = ISCSI_PARAM_ISID; 4420 else if (attr == &dev_attr_sess_tsid.attr) 4421 param = ISCSI_PARAM_TSID; 4422 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4423 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4424 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4425 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4426 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4427 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4428 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4429 return S_IRUGO | S_IWUSR; 4430 else if (attr == &dev_attr_priv_sess_state.attr) 4431 return S_IRUGO; 4432 else if (attr == &dev_attr_priv_sess_creator.attr) 4433 return S_IRUGO; 4434 else if (attr == &dev_attr_priv_sess_target_id.attr) 4435 return S_IRUGO; 4436 else { 4437 WARN_ONCE(1, "Invalid session attr"); 4438 return 0; 4439 } 4440 4441 return t->attr_is_visible(ISCSI_PARAM, param); 4442 } 4443 4444 static struct attribute_group iscsi_session_group = { 4445 .attrs = iscsi_session_attrs, 4446 .is_visible = iscsi_session_attr_is_visible, 4447 }; 4448 4449 /* 4450 * iSCSI host attrs 4451 */ 4452 #define iscsi_host_attr_show(param) \ 4453 static ssize_t \ 4454 show_host_param_##param(struct device *dev, \ 4455 struct device_attribute *attr, char *buf) \ 4456 { \ 4457 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4458 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4459 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4460 } 4461 4462 #define iscsi_host_attr(field, param) \ 4463 iscsi_host_attr_show(param) \ 4464 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4465 NULL); 4466 4467 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4468 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4469 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4470 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4471 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4472 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4473 4474 static struct attribute *iscsi_host_attrs[] = { 4475 &dev_attr_host_netdev.attr, 4476 &dev_attr_host_hwaddress.attr, 4477 &dev_attr_host_ipaddress.attr, 4478 &dev_attr_host_initiatorname.attr, 4479 &dev_attr_host_port_state.attr, 4480 &dev_attr_host_port_speed.attr, 4481 NULL, 4482 }; 4483 4484 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4485 struct attribute *attr, int i) 4486 { 4487 struct device *cdev = container_of(kobj, struct device, kobj); 4488 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4489 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4490 int param; 4491 4492 if (attr == &dev_attr_host_netdev.attr) 4493 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4494 else if (attr == &dev_attr_host_hwaddress.attr) 4495 param = ISCSI_HOST_PARAM_HWADDRESS; 4496 else if (attr == &dev_attr_host_ipaddress.attr) 4497 param = ISCSI_HOST_PARAM_IPADDRESS; 4498 else if (attr == &dev_attr_host_initiatorname.attr) 4499 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4500 else if (attr == &dev_attr_host_port_state.attr) 4501 param = ISCSI_HOST_PARAM_PORT_STATE; 4502 else if (attr == &dev_attr_host_port_speed.attr) 4503 param = ISCSI_HOST_PARAM_PORT_SPEED; 4504 else { 4505 WARN_ONCE(1, "Invalid host attr"); 4506 return 0; 4507 } 4508 4509 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4510 } 4511 4512 static struct attribute_group iscsi_host_group = { 4513 .attrs = iscsi_host_attrs, 4514 .is_visible = iscsi_host_attr_is_visible, 4515 }; 4516 4517 /* convert iscsi_port_speed values to ascii string name */ 4518 static const struct { 4519 enum iscsi_port_speed value; 4520 char *name; 4521 } iscsi_port_speed_names[] = { 4522 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4523 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4524 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4525 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4526 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4527 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4528 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4529 }; 4530 4531 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4532 { 4533 int i; 4534 char *speed = "Unknown!"; 4535 struct iscsi_cls_host *ihost = shost->shost_data; 4536 uint32_t port_speed = ihost->port_speed; 4537 4538 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4539 if (iscsi_port_speed_names[i].value & port_speed) { 4540 speed = iscsi_port_speed_names[i].name; 4541 break; 4542 } 4543 } 4544 return speed; 4545 } 4546 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4547 4548 /* convert iscsi_port_state values to ascii string name */ 4549 static const struct { 4550 enum iscsi_port_state value; 4551 char *name; 4552 } iscsi_port_state_names[] = { 4553 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4554 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4555 }; 4556 4557 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4558 { 4559 int i; 4560 char *state = "Unknown!"; 4561 struct iscsi_cls_host *ihost = shost->shost_data; 4562 uint32_t port_state = ihost->port_state; 4563 4564 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4565 if (iscsi_port_state_names[i].value & port_state) { 4566 state = iscsi_port_state_names[i].name; 4567 break; 4568 } 4569 } 4570 return state; 4571 } 4572 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4573 4574 static int iscsi_session_match(struct attribute_container *cont, 4575 struct device *dev) 4576 { 4577 struct iscsi_cls_session *session; 4578 struct Scsi_Host *shost; 4579 struct iscsi_internal *priv; 4580 4581 if (!iscsi_is_session_dev(dev)) 4582 return 0; 4583 4584 session = iscsi_dev_to_session(dev); 4585 shost = iscsi_session_to_shost(session); 4586 if (!shost->transportt) 4587 return 0; 4588 4589 priv = to_iscsi_internal(shost->transportt); 4590 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4591 return 0; 4592 4593 return &priv->session_cont.ac == cont; 4594 } 4595 4596 static int iscsi_conn_match(struct attribute_container *cont, 4597 struct device *dev) 4598 { 4599 struct iscsi_cls_session *session; 4600 struct iscsi_cls_conn *conn; 4601 struct Scsi_Host *shost; 4602 struct iscsi_internal *priv; 4603 4604 if (!iscsi_is_conn_dev(dev)) 4605 return 0; 4606 4607 conn = iscsi_dev_to_conn(dev); 4608 session = iscsi_dev_to_session(conn->dev.parent); 4609 shost = iscsi_session_to_shost(session); 4610 4611 if (!shost->transportt) 4612 return 0; 4613 4614 priv = to_iscsi_internal(shost->transportt); 4615 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4616 return 0; 4617 4618 return &priv->conn_cont.ac == cont; 4619 } 4620 4621 static int iscsi_host_match(struct attribute_container *cont, 4622 struct device *dev) 4623 { 4624 struct Scsi_Host *shost; 4625 struct iscsi_internal *priv; 4626 4627 if (!scsi_is_host_device(dev)) 4628 return 0; 4629 4630 shost = dev_to_shost(dev); 4631 if (!shost->transportt || 4632 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4633 return 0; 4634 4635 priv = to_iscsi_internal(shost->transportt); 4636 return &priv->t.host_attrs.ac == cont; 4637 } 4638 4639 struct scsi_transport_template * 4640 iscsi_register_transport(struct iscsi_transport *tt) 4641 { 4642 struct iscsi_internal *priv; 4643 unsigned long flags; 4644 int err; 4645 4646 BUG_ON(!tt); 4647 4648 priv = iscsi_if_transport_lookup(tt); 4649 if (priv) 4650 return NULL; 4651 4652 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4653 if (!priv) 4654 return NULL; 4655 INIT_LIST_HEAD(&priv->list); 4656 priv->iscsi_transport = tt; 4657 priv->t.user_scan = iscsi_user_scan; 4658 priv->t.create_work_queue = 1; 4659 4660 priv->dev.class = &iscsi_transport_class; 4661 dev_set_name(&priv->dev, "%s", tt->name); 4662 err = device_register(&priv->dev); 4663 if (err) 4664 goto free_priv; 4665 4666 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4667 if (err) 4668 goto unregister_dev; 4669 4670 /* host parameters */ 4671 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4672 priv->t.host_attrs.ac.match = iscsi_host_match; 4673 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4674 priv->t.host_size = sizeof(struct iscsi_cls_host); 4675 transport_container_register(&priv->t.host_attrs); 4676 4677 /* connection parameters */ 4678 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4679 priv->conn_cont.ac.match = iscsi_conn_match; 4680 priv->conn_cont.ac.grp = &iscsi_conn_group; 4681 transport_container_register(&priv->conn_cont); 4682 4683 /* session parameters */ 4684 priv->session_cont.ac.class = &iscsi_session_class.class; 4685 priv->session_cont.ac.match = iscsi_session_match; 4686 priv->session_cont.ac.grp = &iscsi_session_group; 4687 transport_container_register(&priv->session_cont); 4688 4689 spin_lock_irqsave(&iscsi_transport_lock, flags); 4690 list_add(&priv->list, &iscsi_transports); 4691 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4692 4693 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4694 return &priv->t; 4695 4696 unregister_dev: 4697 device_unregister(&priv->dev); 4698 return NULL; 4699 free_priv: 4700 kfree(priv); 4701 return NULL; 4702 } 4703 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4704 4705 int iscsi_unregister_transport(struct iscsi_transport *tt) 4706 { 4707 struct iscsi_internal *priv; 4708 unsigned long flags; 4709 4710 BUG_ON(!tt); 4711 4712 mutex_lock(&rx_queue_mutex); 4713 4714 priv = iscsi_if_transport_lookup(tt); 4715 BUG_ON (!priv); 4716 4717 spin_lock_irqsave(&iscsi_transport_lock, flags); 4718 list_del(&priv->list); 4719 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4720 4721 transport_container_unregister(&priv->conn_cont); 4722 transport_container_unregister(&priv->session_cont); 4723 transport_container_unregister(&priv->t.host_attrs); 4724 4725 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4726 device_unregister(&priv->dev); 4727 mutex_unlock(&rx_queue_mutex); 4728 4729 return 0; 4730 } 4731 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4732 4733 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4734 struct device *dev, const char *fmt, ...) 4735 { 4736 struct va_format vaf; 4737 va_list args; 4738 4739 va_start(args, fmt); 4740 vaf.fmt = fmt; 4741 vaf.va = &args; 4742 trace(dev, &vaf); 4743 va_end(args); 4744 } 4745 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4746 4747 static __init int iscsi_transport_init(void) 4748 { 4749 int err; 4750 struct netlink_kernel_cfg cfg = { 4751 .groups = 1, 4752 .input = iscsi_if_rx, 4753 }; 4754 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4755 ISCSI_TRANSPORT_VERSION); 4756 4757 atomic_set(&iscsi_session_nr, 0); 4758 4759 err = class_register(&iscsi_transport_class); 4760 if (err) 4761 return err; 4762 4763 err = class_register(&iscsi_endpoint_class); 4764 if (err) 4765 goto unregister_transport_class; 4766 4767 err = class_register(&iscsi_iface_class); 4768 if (err) 4769 goto unregister_endpoint_class; 4770 4771 err = transport_class_register(&iscsi_host_class); 4772 if (err) 4773 goto unregister_iface_class; 4774 4775 err = transport_class_register(&iscsi_connection_class); 4776 if (err) 4777 goto unregister_host_class; 4778 4779 err = transport_class_register(&iscsi_session_class); 4780 if (err) 4781 goto unregister_conn_class; 4782 4783 err = bus_register(&iscsi_flashnode_bus); 4784 if (err) 4785 goto unregister_session_class; 4786 4787 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4788 if (!nls) { 4789 err = -ENOBUFS; 4790 goto unregister_flashnode_bus; 4791 } 4792 4793 iscsi_eh_timer_workq = alloc_workqueue("%s", 4794 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4795 1, "iscsi_eh"); 4796 if (!iscsi_eh_timer_workq) { 4797 err = -ENOMEM; 4798 goto release_nls; 4799 } 4800 4801 iscsi_destroy_workq = alloc_workqueue("%s", 4802 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4803 1, "iscsi_destroy"); 4804 if (!iscsi_destroy_workq) { 4805 err = -ENOMEM; 4806 goto destroy_wq; 4807 } 4808 4809 return 0; 4810 4811 destroy_wq: 4812 destroy_workqueue(iscsi_eh_timer_workq); 4813 release_nls: 4814 netlink_kernel_release(nls); 4815 unregister_flashnode_bus: 4816 bus_unregister(&iscsi_flashnode_bus); 4817 unregister_session_class: 4818 transport_class_unregister(&iscsi_session_class); 4819 unregister_conn_class: 4820 transport_class_unregister(&iscsi_connection_class); 4821 unregister_host_class: 4822 transport_class_unregister(&iscsi_host_class); 4823 unregister_iface_class: 4824 class_unregister(&iscsi_iface_class); 4825 unregister_endpoint_class: 4826 class_unregister(&iscsi_endpoint_class); 4827 unregister_transport_class: 4828 class_unregister(&iscsi_transport_class); 4829 return err; 4830 } 4831 4832 static void __exit iscsi_transport_exit(void) 4833 { 4834 destroy_workqueue(iscsi_destroy_workq); 4835 destroy_workqueue(iscsi_eh_timer_workq); 4836 netlink_kernel_release(nls); 4837 bus_unregister(&iscsi_flashnode_bus); 4838 transport_class_unregister(&iscsi_connection_class); 4839 transport_class_unregister(&iscsi_session_class); 4840 transport_class_unregister(&iscsi_host_class); 4841 class_unregister(&iscsi_endpoint_class); 4842 class_unregister(&iscsi_iface_class); 4843 class_unregister(&iscsi_transport_class); 4844 } 4845 4846 module_init(iscsi_transport_init); 4847 module_exit(iscsi_transport_exit); 4848 4849 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4850 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4851 "Alex Aizman <itn780@yahoo.com>"); 4852 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4853 MODULE_LICENSE("GPL"); 4854 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4855 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4856