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 switch (flag) { 2478 case STOP_CONN_RECOVER: 2479 conn->state = ISCSI_CONN_FAILED; 2480 break; 2481 case STOP_CONN_TERM: 2482 conn->state = ISCSI_CONN_DOWN; 2483 break; 2484 default: 2485 iscsi_cls_conn_printk(KERN_ERR, conn, 2486 "invalid stop flag %d\n", flag); 2487 goto unlock; 2488 } 2489 2490 conn->transport->stop_conn(conn, flag); 2491 unlock: 2492 mutex_unlock(&conn_mutex); 2493 } 2494 2495 static void stop_conn_work_fn(struct work_struct *work) 2496 { 2497 struct iscsi_cls_conn *conn, *tmp; 2498 unsigned long flags; 2499 LIST_HEAD(recovery_list); 2500 2501 spin_lock_irqsave(&connlock, flags); 2502 if (list_empty(&connlist_err)) { 2503 spin_unlock_irqrestore(&connlock, flags); 2504 return; 2505 } 2506 list_splice_init(&connlist_err, &recovery_list); 2507 spin_unlock_irqrestore(&connlock, flags); 2508 2509 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) { 2510 uint32_t sid = iscsi_conn_get_sid(conn); 2511 struct iscsi_cls_session *session; 2512 2513 session = iscsi_session_lookup(sid); 2514 if (session) { 2515 if (system_state != SYSTEM_RUNNING) { 2516 session->recovery_tmo = 0; 2517 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2518 } else { 2519 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER); 2520 } 2521 } 2522 2523 list_del_init(&conn->conn_list_err); 2524 } 2525 } 2526 2527 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2528 { 2529 struct nlmsghdr *nlh; 2530 struct sk_buff *skb; 2531 struct iscsi_uevent *ev; 2532 struct iscsi_internal *priv; 2533 int len = nlmsg_total_size(sizeof(*ev)); 2534 unsigned long flags; 2535 2536 spin_lock_irqsave(&connlock, flags); 2537 list_add(&conn->conn_list_err, &connlist_err); 2538 spin_unlock_irqrestore(&connlock, flags); 2539 queue_work(system_unbound_wq, &stop_conn_work); 2540 2541 priv = iscsi_if_transport_lookup(conn->transport); 2542 if (!priv) 2543 return; 2544 2545 skb = alloc_skb(len, GFP_ATOMIC); 2546 if (!skb) { 2547 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2548 "conn error (%d)\n", error); 2549 return; 2550 } 2551 2552 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2553 ev = nlmsg_data(nlh); 2554 ev->transport_handle = iscsi_handle(conn->transport); 2555 ev->type = ISCSI_KEVENT_CONN_ERROR; 2556 ev->r.connerror.error = error; 2557 ev->r.connerror.cid = conn->cid; 2558 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2559 2560 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2561 2562 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2563 error); 2564 } 2565 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2566 2567 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2568 enum iscsi_conn_state state) 2569 { 2570 struct nlmsghdr *nlh; 2571 struct sk_buff *skb; 2572 struct iscsi_uevent *ev; 2573 struct iscsi_internal *priv; 2574 int len = nlmsg_total_size(sizeof(*ev)); 2575 2576 priv = iscsi_if_transport_lookup(conn->transport); 2577 if (!priv) 2578 return; 2579 2580 skb = alloc_skb(len, GFP_ATOMIC); 2581 if (!skb) { 2582 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2583 "conn login (%d)\n", state); 2584 return; 2585 } 2586 2587 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2588 ev = nlmsg_data(nlh); 2589 ev->transport_handle = iscsi_handle(conn->transport); 2590 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2591 ev->r.conn_login.state = state; 2592 ev->r.conn_login.cid = conn->cid; 2593 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2594 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2595 2596 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2597 state); 2598 } 2599 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2600 2601 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2602 enum iscsi_host_event_code code, uint32_t data_size, 2603 uint8_t *data) 2604 { 2605 struct nlmsghdr *nlh; 2606 struct sk_buff *skb; 2607 struct iscsi_uevent *ev; 2608 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2609 2610 skb = alloc_skb(len, GFP_NOIO); 2611 if (!skb) { 2612 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2613 host_no, code); 2614 return; 2615 } 2616 2617 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2618 ev = nlmsg_data(nlh); 2619 ev->transport_handle = iscsi_handle(transport); 2620 ev->type = ISCSI_KEVENT_HOST_EVENT; 2621 ev->r.host_event.host_no = host_no; 2622 ev->r.host_event.code = code; 2623 ev->r.host_event.data_size = data_size; 2624 2625 if (data_size) 2626 memcpy((char *)ev + sizeof(*ev), data, data_size); 2627 2628 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2629 } 2630 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2631 2632 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2633 uint32_t status, uint32_t pid, uint32_t data_size, 2634 uint8_t *data) 2635 { 2636 struct nlmsghdr *nlh; 2637 struct sk_buff *skb; 2638 struct iscsi_uevent *ev; 2639 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2640 2641 skb = alloc_skb(len, GFP_NOIO); 2642 if (!skb) { 2643 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2644 return; 2645 } 2646 2647 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2648 ev = nlmsg_data(nlh); 2649 ev->transport_handle = iscsi_handle(transport); 2650 ev->type = ISCSI_KEVENT_PING_COMP; 2651 ev->r.ping_comp.host_no = host_no; 2652 ev->r.ping_comp.status = status; 2653 ev->r.ping_comp.pid = pid; 2654 ev->r.ping_comp.data_size = data_size; 2655 memcpy((char *)ev + sizeof(*ev), data, data_size); 2656 2657 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2658 } 2659 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2660 2661 static int 2662 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2663 { 2664 struct sk_buff *skb; 2665 struct nlmsghdr *nlh; 2666 int len = nlmsg_total_size(size); 2667 2668 skb = alloc_skb(len, GFP_ATOMIC); 2669 if (!skb) { 2670 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2671 return -ENOMEM; 2672 } 2673 2674 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2675 memcpy(nlmsg_data(nlh), payload, size); 2676 return iscsi_unicast_skb(skb, portid); 2677 } 2678 2679 static int 2680 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2681 { 2682 struct iscsi_uevent *ev = nlmsg_data(nlh); 2683 struct iscsi_stats *stats; 2684 struct sk_buff *skbstat; 2685 struct iscsi_cls_conn *conn; 2686 struct nlmsghdr *nlhstat; 2687 struct iscsi_uevent *evstat; 2688 struct iscsi_internal *priv; 2689 int len = nlmsg_total_size(sizeof(*ev) + 2690 sizeof(struct iscsi_stats) + 2691 sizeof(struct iscsi_stats_custom) * 2692 ISCSI_STATS_CUSTOM_MAX); 2693 int err = 0; 2694 2695 priv = iscsi_if_transport_lookup(transport); 2696 if (!priv) 2697 return -EINVAL; 2698 2699 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2700 if (!conn) 2701 return -EEXIST; 2702 2703 do { 2704 int actual_size; 2705 2706 skbstat = alloc_skb(len, GFP_ATOMIC); 2707 if (!skbstat) { 2708 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2709 "deliver stats: OOM\n"); 2710 return -ENOMEM; 2711 } 2712 2713 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2714 (len - sizeof(*nlhstat)), 0); 2715 evstat = nlmsg_data(nlhstat); 2716 memset(evstat, 0, sizeof(*evstat)); 2717 evstat->transport_handle = iscsi_handle(conn->transport); 2718 evstat->type = nlh->nlmsg_type; 2719 evstat->u.get_stats.cid = 2720 ev->u.get_stats.cid; 2721 evstat->u.get_stats.sid = 2722 ev->u.get_stats.sid; 2723 stats = (struct iscsi_stats *) 2724 ((char*)evstat + sizeof(*evstat)); 2725 memset(stats, 0, sizeof(*stats)); 2726 2727 transport->get_stats(conn, stats); 2728 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2729 sizeof(struct iscsi_stats) + 2730 sizeof(struct iscsi_stats_custom) * 2731 stats->custom_length); 2732 actual_size -= sizeof(*nlhstat); 2733 actual_size = nlmsg_msg_size(actual_size); 2734 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2735 nlhstat->nlmsg_len = actual_size; 2736 2737 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2738 GFP_ATOMIC); 2739 } while (err < 0 && err != -ECONNREFUSED); 2740 2741 return err; 2742 } 2743 2744 /** 2745 * iscsi_session_event - send session destr. completion event 2746 * @session: iscsi class session 2747 * @event: type of event 2748 */ 2749 int iscsi_session_event(struct iscsi_cls_session *session, 2750 enum iscsi_uevent_e event) 2751 { 2752 struct iscsi_internal *priv; 2753 struct Scsi_Host *shost; 2754 struct iscsi_uevent *ev; 2755 struct sk_buff *skb; 2756 struct nlmsghdr *nlh; 2757 int rc, len = nlmsg_total_size(sizeof(*ev)); 2758 2759 priv = iscsi_if_transport_lookup(session->transport); 2760 if (!priv) 2761 return -EINVAL; 2762 shost = iscsi_session_to_shost(session); 2763 2764 skb = alloc_skb(len, GFP_KERNEL); 2765 if (!skb) { 2766 iscsi_cls_session_printk(KERN_ERR, session, 2767 "Cannot notify userspace of session " 2768 "event %u\n", event); 2769 return -ENOMEM; 2770 } 2771 2772 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2773 ev = nlmsg_data(nlh); 2774 ev->transport_handle = iscsi_handle(session->transport); 2775 2776 ev->type = event; 2777 switch (event) { 2778 case ISCSI_KEVENT_DESTROY_SESSION: 2779 ev->r.d_session.host_no = shost->host_no; 2780 ev->r.d_session.sid = session->sid; 2781 break; 2782 case ISCSI_KEVENT_CREATE_SESSION: 2783 ev->r.c_session_ret.host_no = shost->host_no; 2784 ev->r.c_session_ret.sid = session->sid; 2785 break; 2786 case ISCSI_KEVENT_UNBIND_SESSION: 2787 ev->r.unbind_session.host_no = shost->host_no; 2788 ev->r.unbind_session.sid = session->sid; 2789 break; 2790 default: 2791 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2792 "%u.\n", event); 2793 kfree_skb(skb); 2794 return -EINVAL; 2795 } 2796 2797 /* 2798 * this will occur if the daemon is not up, so we just warn 2799 * the user and when the daemon is restarted it will handle it 2800 */ 2801 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2802 if (rc == -ESRCH) 2803 iscsi_cls_session_printk(KERN_ERR, session, 2804 "Cannot notify userspace of session " 2805 "event %u. Check iscsi daemon\n", 2806 event); 2807 2808 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2809 event, rc); 2810 return rc; 2811 } 2812 EXPORT_SYMBOL_GPL(iscsi_session_event); 2813 2814 static int 2815 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2816 struct iscsi_uevent *ev, pid_t pid, 2817 uint32_t initial_cmdsn, uint16_t cmds_max, 2818 uint16_t queue_depth) 2819 { 2820 struct iscsi_transport *transport = priv->iscsi_transport; 2821 struct iscsi_cls_session *session; 2822 struct Scsi_Host *shost; 2823 2824 session = transport->create_session(ep, cmds_max, queue_depth, 2825 initial_cmdsn); 2826 if (!session) 2827 return -ENOMEM; 2828 2829 session->creator = pid; 2830 shost = iscsi_session_to_shost(session); 2831 ev->r.c_session_ret.host_no = shost->host_no; 2832 ev->r.c_session_ret.sid = session->sid; 2833 ISCSI_DBG_TRANS_SESSION(session, 2834 "Completed creating transport session\n"); 2835 return 0; 2836 } 2837 2838 static int 2839 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2840 { 2841 struct iscsi_cls_conn *conn; 2842 struct iscsi_cls_session *session; 2843 2844 session = iscsi_session_lookup(ev->u.c_conn.sid); 2845 if (!session) { 2846 printk(KERN_ERR "iscsi: invalid session %d.\n", 2847 ev->u.c_conn.sid); 2848 return -EINVAL; 2849 } 2850 2851 conn = transport->create_conn(session, ev->u.c_conn.cid); 2852 if (!conn) { 2853 iscsi_cls_session_printk(KERN_ERR, session, 2854 "couldn't create a new connection."); 2855 return -ENOMEM; 2856 } 2857 2858 ev->r.c_conn_ret.sid = session->sid; 2859 ev->r.c_conn_ret.cid = conn->cid; 2860 2861 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2862 return 0; 2863 } 2864 2865 static int 2866 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2867 { 2868 struct iscsi_cls_conn *conn; 2869 unsigned long flags; 2870 2871 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2872 if (!conn) 2873 return -EINVAL; 2874 2875 spin_lock_irqsave(&connlock, flags); 2876 if (!list_empty(&conn->conn_list_err)) { 2877 spin_unlock_irqrestore(&connlock, flags); 2878 return -EAGAIN; 2879 } 2880 spin_unlock_irqrestore(&connlock, flags); 2881 2882 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2883 2884 mutex_lock(&conn_mutex); 2885 if (transport->destroy_conn) 2886 transport->destroy_conn(conn); 2887 mutex_unlock(&conn_mutex); 2888 2889 return 0; 2890 } 2891 2892 static int 2893 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2894 { 2895 char *data = (char*)ev + sizeof(*ev); 2896 struct iscsi_cls_conn *conn; 2897 struct iscsi_cls_session *session; 2898 int err = 0, value = 0; 2899 2900 if (ev->u.set_param.len > PAGE_SIZE) 2901 return -EINVAL; 2902 2903 session = iscsi_session_lookup(ev->u.set_param.sid); 2904 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2905 if (!conn || !session) 2906 return -EINVAL; 2907 2908 switch (ev->u.set_param.param) { 2909 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2910 sscanf(data, "%d", &value); 2911 if (!session->recovery_tmo_sysfs_override) 2912 session->recovery_tmo = value; 2913 break; 2914 default: 2915 err = transport->set_param(conn, ev->u.set_param.param, 2916 data, ev->u.set_param.len); 2917 if ((conn->state == ISCSI_CONN_BOUND) || 2918 (conn->state == ISCSI_CONN_UP)) { 2919 err = transport->set_param(conn, ev->u.set_param.param, 2920 data, ev->u.set_param.len); 2921 } else { 2922 return -ENOTCONN; 2923 } 2924 } 2925 2926 return err; 2927 } 2928 2929 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2930 struct iscsi_uevent *ev, int msg_type) 2931 { 2932 struct iscsi_endpoint *ep; 2933 struct sockaddr *dst_addr; 2934 struct Scsi_Host *shost = NULL; 2935 int non_blocking, err = 0; 2936 2937 if (!transport->ep_connect) 2938 return -EINVAL; 2939 2940 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2941 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2942 if (!shost) { 2943 printk(KERN_ERR "ep connect failed. Could not find " 2944 "host no %u\n", 2945 ev->u.ep_connect_through_host.host_no); 2946 return -ENODEV; 2947 } 2948 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2949 } else 2950 non_blocking = ev->u.ep_connect.non_blocking; 2951 2952 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2953 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2954 if (IS_ERR(ep)) { 2955 err = PTR_ERR(ep); 2956 goto release_host; 2957 } 2958 2959 ev->r.ep_connect_ret.handle = ep->id; 2960 release_host: 2961 if (shost) 2962 scsi_host_put(shost); 2963 return err; 2964 } 2965 2966 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2967 u64 ep_handle) 2968 { 2969 struct iscsi_cls_conn *conn; 2970 struct iscsi_endpoint *ep; 2971 2972 if (!transport->ep_disconnect) 2973 return -EINVAL; 2974 2975 ep = iscsi_lookup_endpoint(ep_handle); 2976 if (!ep) 2977 return -EINVAL; 2978 conn = ep->conn; 2979 if (conn) { 2980 mutex_lock(&conn->ep_mutex); 2981 conn->ep = NULL; 2982 mutex_unlock(&conn->ep_mutex); 2983 conn->state = ISCSI_CONN_FAILED; 2984 } 2985 2986 transport->ep_disconnect(ep); 2987 return 0; 2988 } 2989 2990 static int 2991 iscsi_if_transport_ep(struct iscsi_transport *transport, 2992 struct iscsi_uevent *ev, int msg_type) 2993 { 2994 struct iscsi_endpoint *ep; 2995 int rc = 0; 2996 2997 switch (msg_type) { 2998 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2999 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3000 rc = iscsi_if_ep_connect(transport, ev, msg_type); 3001 break; 3002 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3003 if (!transport->ep_poll) 3004 return -EINVAL; 3005 3006 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 3007 if (!ep) 3008 return -EINVAL; 3009 3010 ev->r.retcode = transport->ep_poll(ep, 3011 ev->u.ep_poll.timeout_ms); 3012 break; 3013 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3014 rc = iscsi_if_ep_disconnect(transport, 3015 ev->u.ep_disconnect.ep_handle); 3016 break; 3017 } 3018 return rc; 3019 } 3020 3021 static int 3022 iscsi_tgt_dscvr(struct iscsi_transport *transport, 3023 struct iscsi_uevent *ev) 3024 { 3025 struct Scsi_Host *shost; 3026 struct sockaddr *dst_addr; 3027 int err; 3028 3029 if (!transport->tgt_dscvr) 3030 return -EINVAL; 3031 3032 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3033 if (!shost) { 3034 printk(KERN_ERR "target discovery could not find host no %u\n", 3035 ev->u.tgt_dscvr.host_no); 3036 return -ENODEV; 3037 } 3038 3039 3040 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3041 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3042 ev->u.tgt_dscvr.enable, dst_addr); 3043 scsi_host_put(shost); 3044 return err; 3045 } 3046 3047 static int 3048 iscsi_set_host_param(struct iscsi_transport *transport, 3049 struct iscsi_uevent *ev) 3050 { 3051 char *data = (char*)ev + sizeof(*ev); 3052 struct Scsi_Host *shost; 3053 int err; 3054 3055 if (!transport->set_host_param) 3056 return -ENOSYS; 3057 3058 if (ev->u.set_host_param.len > PAGE_SIZE) 3059 return -EINVAL; 3060 3061 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3062 if (!shost) { 3063 printk(KERN_ERR "set_host_param could not find host no %u\n", 3064 ev->u.set_host_param.host_no); 3065 return -ENODEV; 3066 } 3067 3068 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3069 data, ev->u.set_host_param.len); 3070 scsi_host_put(shost); 3071 return err; 3072 } 3073 3074 static int 3075 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3076 { 3077 struct Scsi_Host *shost; 3078 struct iscsi_path *params; 3079 int err; 3080 3081 if (!transport->set_path) 3082 return -ENOSYS; 3083 3084 shost = scsi_host_lookup(ev->u.set_path.host_no); 3085 if (!shost) { 3086 printk(KERN_ERR "set path could not find host no %u\n", 3087 ev->u.set_path.host_no); 3088 return -ENODEV; 3089 } 3090 3091 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3092 err = transport->set_path(shost, params); 3093 3094 scsi_host_put(shost); 3095 return err; 3096 } 3097 3098 static int iscsi_session_has_conns(int sid) 3099 { 3100 struct iscsi_cls_conn *conn; 3101 unsigned long flags; 3102 int found = 0; 3103 3104 spin_lock_irqsave(&connlock, flags); 3105 list_for_each_entry(conn, &connlist, conn_list) { 3106 if (iscsi_conn_get_sid(conn) == sid) { 3107 found = 1; 3108 break; 3109 } 3110 } 3111 spin_unlock_irqrestore(&connlock, flags); 3112 3113 return found; 3114 } 3115 3116 static int 3117 iscsi_set_iface_params(struct iscsi_transport *transport, 3118 struct iscsi_uevent *ev, uint32_t len) 3119 { 3120 char *data = (char *)ev + sizeof(*ev); 3121 struct Scsi_Host *shost; 3122 int err; 3123 3124 if (!transport->set_iface_param) 3125 return -ENOSYS; 3126 3127 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3128 if (!shost) { 3129 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3130 ev->u.set_iface_params.host_no); 3131 return -ENODEV; 3132 } 3133 3134 err = transport->set_iface_param(shost, data, len); 3135 scsi_host_put(shost); 3136 return err; 3137 } 3138 3139 static int 3140 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3141 { 3142 struct Scsi_Host *shost; 3143 struct sockaddr *dst_addr; 3144 int err; 3145 3146 if (!transport->send_ping) 3147 return -ENOSYS; 3148 3149 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3150 if (!shost) { 3151 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3152 ev->u.iscsi_ping.host_no); 3153 return -ENODEV; 3154 } 3155 3156 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3157 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3158 ev->u.iscsi_ping.iface_type, 3159 ev->u.iscsi_ping.payload_size, 3160 ev->u.iscsi_ping.pid, 3161 dst_addr); 3162 scsi_host_put(shost); 3163 return err; 3164 } 3165 3166 static int 3167 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3168 { 3169 struct iscsi_uevent *ev = nlmsg_data(nlh); 3170 struct Scsi_Host *shost = NULL; 3171 struct iscsi_chap_rec *chap_rec; 3172 struct iscsi_internal *priv; 3173 struct sk_buff *skbchap; 3174 struct nlmsghdr *nlhchap; 3175 struct iscsi_uevent *evchap; 3176 uint32_t chap_buf_size; 3177 int len, err = 0; 3178 char *buf; 3179 3180 if (!transport->get_chap) 3181 return -EINVAL; 3182 3183 priv = iscsi_if_transport_lookup(transport); 3184 if (!priv) 3185 return -EINVAL; 3186 3187 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3188 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3189 3190 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3191 if (!shost) { 3192 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3193 __func__, ev->u.get_chap.host_no); 3194 return -ENODEV; 3195 } 3196 3197 do { 3198 int actual_size; 3199 3200 skbchap = alloc_skb(len, GFP_KERNEL); 3201 if (!skbchap) { 3202 printk(KERN_ERR "can not deliver chap: OOM\n"); 3203 err = -ENOMEM; 3204 goto exit_get_chap; 3205 } 3206 3207 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3208 (len - sizeof(*nlhchap)), 0); 3209 evchap = nlmsg_data(nlhchap); 3210 memset(evchap, 0, sizeof(*evchap)); 3211 evchap->transport_handle = iscsi_handle(transport); 3212 evchap->type = nlh->nlmsg_type; 3213 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3214 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3215 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3216 buf = (char *)evchap + sizeof(*evchap); 3217 memset(buf, 0, chap_buf_size); 3218 3219 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3220 &evchap->u.get_chap.num_entries, buf); 3221 3222 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3223 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3224 nlhchap->nlmsg_len = actual_size; 3225 3226 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3227 GFP_KERNEL); 3228 } while (err < 0 && err != -ECONNREFUSED); 3229 3230 exit_get_chap: 3231 scsi_host_put(shost); 3232 return err; 3233 } 3234 3235 static int iscsi_set_chap(struct iscsi_transport *transport, 3236 struct iscsi_uevent *ev, uint32_t len) 3237 { 3238 char *data = (char *)ev + sizeof(*ev); 3239 struct Scsi_Host *shost; 3240 int err = 0; 3241 3242 if (!transport->set_chap) 3243 return -ENOSYS; 3244 3245 shost = scsi_host_lookup(ev->u.set_path.host_no); 3246 if (!shost) { 3247 pr_err("%s could not find host no %u\n", 3248 __func__, ev->u.set_path.host_no); 3249 return -ENODEV; 3250 } 3251 3252 err = transport->set_chap(shost, data, len); 3253 scsi_host_put(shost); 3254 return err; 3255 } 3256 3257 static int iscsi_delete_chap(struct iscsi_transport *transport, 3258 struct iscsi_uevent *ev) 3259 { 3260 struct Scsi_Host *shost; 3261 int err = 0; 3262 3263 if (!transport->delete_chap) 3264 return -ENOSYS; 3265 3266 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3267 if (!shost) { 3268 printk(KERN_ERR "%s could not find host no %u\n", 3269 __func__, ev->u.delete_chap.host_no); 3270 return -ENODEV; 3271 } 3272 3273 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3274 scsi_host_put(shost); 3275 return err; 3276 } 3277 3278 static const struct { 3279 enum iscsi_discovery_parent_type value; 3280 char *name; 3281 } iscsi_discovery_parent_names[] = { 3282 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3283 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3284 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3285 }; 3286 3287 char *iscsi_get_discovery_parent_name(int parent_type) 3288 { 3289 int i; 3290 char *state = "Unknown!"; 3291 3292 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3293 if (iscsi_discovery_parent_names[i].value & parent_type) { 3294 state = iscsi_discovery_parent_names[i].name; 3295 break; 3296 } 3297 } 3298 return state; 3299 } 3300 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3301 3302 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3303 struct iscsi_uevent *ev, uint32_t len) 3304 { 3305 char *data = (char *)ev + sizeof(*ev); 3306 struct Scsi_Host *shost; 3307 struct iscsi_bus_flash_session *fnode_sess; 3308 struct iscsi_bus_flash_conn *fnode_conn; 3309 struct device *dev; 3310 uint32_t idx; 3311 int err = 0; 3312 3313 if (!transport->set_flashnode_param) { 3314 err = -ENOSYS; 3315 goto exit_set_fnode; 3316 } 3317 3318 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3319 if (!shost) { 3320 pr_err("%s could not find host no %u\n", 3321 __func__, ev->u.set_flashnode.host_no); 3322 err = -ENODEV; 3323 goto exit_set_fnode; 3324 } 3325 3326 idx = ev->u.set_flashnode.flashnode_idx; 3327 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3328 if (!fnode_sess) { 3329 pr_err("%s could not find flashnode %u for host no %u\n", 3330 __func__, idx, ev->u.set_flashnode.host_no); 3331 err = -ENODEV; 3332 goto put_host; 3333 } 3334 3335 dev = iscsi_find_flashnode_conn(fnode_sess); 3336 if (!dev) { 3337 err = -ENODEV; 3338 goto put_sess; 3339 } 3340 3341 fnode_conn = iscsi_dev_to_flash_conn(dev); 3342 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3343 put_device(dev); 3344 3345 put_sess: 3346 put_device(&fnode_sess->dev); 3347 3348 put_host: 3349 scsi_host_put(shost); 3350 3351 exit_set_fnode: 3352 return err; 3353 } 3354 3355 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3356 struct iscsi_uevent *ev, uint32_t len) 3357 { 3358 char *data = (char *)ev + sizeof(*ev); 3359 struct Scsi_Host *shost; 3360 int index; 3361 int err = 0; 3362 3363 if (!transport->new_flashnode) { 3364 err = -ENOSYS; 3365 goto exit_new_fnode; 3366 } 3367 3368 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3369 if (!shost) { 3370 pr_err("%s could not find host no %u\n", 3371 __func__, ev->u.new_flashnode.host_no); 3372 err = -ENODEV; 3373 goto put_host; 3374 } 3375 3376 index = transport->new_flashnode(shost, data, len); 3377 3378 if (index >= 0) 3379 ev->r.new_flashnode_ret.flashnode_idx = index; 3380 else 3381 err = -EIO; 3382 3383 put_host: 3384 scsi_host_put(shost); 3385 3386 exit_new_fnode: 3387 return err; 3388 } 3389 3390 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3391 struct iscsi_uevent *ev) 3392 { 3393 struct Scsi_Host *shost; 3394 struct iscsi_bus_flash_session *fnode_sess; 3395 uint32_t idx; 3396 int err = 0; 3397 3398 if (!transport->del_flashnode) { 3399 err = -ENOSYS; 3400 goto exit_del_fnode; 3401 } 3402 3403 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3404 if (!shost) { 3405 pr_err("%s could not find host no %u\n", 3406 __func__, ev->u.del_flashnode.host_no); 3407 err = -ENODEV; 3408 goto put_host; 3409 } 3410 3411 idx = ev->u.del_flashnode.flashnode_idx; 3412 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3413 if (!fnode_sess) { 3414 pr_err("%s could not find flashnode %u for host no %u\n", 3415 __func__, idx, ev->u.del_flashnode.host_no); 3416 err = -ENODEV; 3417 goto put_host; 3418 } 3419 3420 err = transport->del_flashnode(fnode_sess); 3421 put_device(&fnode_sess->dev); 3422 3423 put_host: 3424 scsi_host_put(shost); 3425 3426 exit_del_fnode: 3427 return err; 3428 } 3429 3430 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3431 struct iscsi_uevent *ev) 3432 { 3433 struct Scsi_Host *shost; 3434 struct iscsi_bus_flash_session *fnode_sess; 3435 struct iscsi_bus_flash_conn *fnode_conn; 3436 struct device *dev; 3437 uint32_t idx; 3438 int err = 0; 3439 3440 if (!transport->login_flashnode) { 3441 err = -ENOSYS; 3442 goto exit_login_fnode; 3443 } 3444 3445 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3446 if (!shost) { 3447 pr_err("%s could not find host no %u\n", 3448 __func__, ev->u.login_flashnode.host_no); 3449 err = -ENODEV; 3450 goto put_host; 3451 } 3452 3453 idx = ev->u.login_flashnode.flashnode_idx; 3454 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3455 if (!fnode_sess) { 3456 pr_err("%s could not find flashnode %u for host no %u\n", 3457 __func__, idx, ev->u.login_flashnode.host_no); 3458 err = -ENODEV; 3459 goto put_host; 3460 } 3461 3462 dev = iscsi_find_flashnode_conn(fnode_sess); 3463 if (!dev) { 3464 err = -ENODEV; 3465 goto put_sess; 3466 } 3467 3468 fnode_conn = iscsi_dev_to_flash_conn(dev); 3469 err = transport->login_flashnode(fnode_sess, fnode_conn); 3470 put_device(dev); 3471 3472 put_sess: 3473 put_device(&fnode_sess->dev); 3474 3475 put_host: 3476 scsi_host_put(shost); 3477 3478 exit_login_fnode: 3479 return err; 3480 } 3481 3482 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3483 struct iscsi_uevent *ev) 3484 { 3485 struct Scsi_Host *shost; 3486 struct iscsi_bus_flash_session *fnode_sess; 3487 struct iscsi_bus_flash_conn *fnode_conn; 3488 struct device *dev; 3489 uint32_t idx; 3490 int err = 0; 3491 3492 if (!transport->logout_flashnode) { 3493 err = -ENOSYS; 3494 goto exit_logout_fnode; 3495 } 3496 3497 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3498 if (!shost) { 3499 pr_err("%s could not find host no %u\n", 3500 __func__, ev->u.logout_flashnode.host_no); 3501 err = -ENODEV; 3502 goto put_host; 3503 } 3504 3505 idx = ev->u.logout_flashnode.flashnode_idx; 3506 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3507 if (!fnode_sess) { 3508 pr_err("%s could not find flashnode %u for host no %u\n", 3509 __func__, idx, ev->u.logout_flashnode.host_no); 3510 err = -ENODEV; 3511 goto put_host; 3512 } 3513 3514 dev = iscsi_find_flashnode_conn(fnode_sess); 3515 if (!dev) { 3516 err = -ENODEV; 3517 goto put_sess; 3518 } 3519 3520 fnode_conn = iscsi_dev_to_flash_conn(dev); 3521 3522 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3523 put_device(dev); 3524 3525 put_sess: 3526 put_device(&fnode_sess->dev); 3527 3528 put_host: 3529 scsi_host_put(shost); 3530 3531 exit_logout_fnode: 3532 return err; 3533 } 3534 3535 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3536 struct iscsi_uevent *ev) 3537 { 3538 struct Scsi_Host *shost; 3539 struct iscsi_cls_session *session; 3540 int err = 0; 3541 3542 if (!transport->logout_flashnode_sid) { 3543 err = -ENOSYS; 3544 goto exit_logout_sid; 3545 } 3546 3547 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3548 if (!shost) { 3549 pr_err("%s could not find host no %u\n", 3550 __func__, ev->u.logout_flashnode.host_no); 3551 err = -ENODEV; 3552 goto put_host; 3553 } 3554 3555 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3556 if (!session) { 3557 pr_err("%s could not find session id %u\n", 3558 __func__, ev->u.logout_flashnode_sid.sid); 3559 err = -EINVAL; 3560 goto put_host; 3561 } 3562 3563 err = transport->logout_flashnode_sid(session); 3564 3565 put_host: 3566 scsi_host_put(shost); 3567 3568 exit_logout_sid: 3569 return err; 3570 } 3571 3572 static int 3573 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3574 { 3575 struct iscsi_uevent *ev = nlmsg_data(nlh); 3576 struct Scsi_Host *shost = NULL; 3577 struct iscsi_internal *priv; 3578 struct sk_buff *skbhost_stats; 3579 struct nlmsghdr *nlhhost_stats; 3580 struct iscsi_uevent *evhost_stats; 3581 int host_stats_size = 0; 3582 int len, err = 0; 3583 char *buf; 3584 3585 if (!transport->get_host_stats) 3586 return -ENOSYS; 3587 3588 priv = iscsi_if_transport_lookup(transport); 3589 if (!priv) 3590 return -EINVAL; 3591 3592 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3593 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3594 3595 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3596 if (!shost) { 3597 pr_err("%s: failed. Could not find host no %u\n", 3598 __func__, ev->u.get_host_stats.host_no); 3599 return -ENODEV; 3600 } 3601 3602 do { 3603 int actual_size; 3604 3605 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3606 if (!skbhost_stats) { 3607 pr_err("cannot deliver host stats: OOM\n"); 3608 err = -ENOMEM; 3609 goto exit_host_stats; 3610 } 3611 3612 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3613 (len - sizeof(*nlhhost_stats)), 0); 3614 evhost_stats = nlmsg_data(nlhhost_stats); 3615 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3616 evhost_stats->transport_handle = iscsi_handle(transport); 3617 evhost_stats->type = nlh->nlmsg_type; 3618 evhost_stats->u.get_host_stats.host_no = 3619 ev->u.get_host_stats.host_no; 3620 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3621 memset(buf, 0, host_stats_size); 3622 3623 err = transport->get_host_stats(shost, buf, host_stats_size); 3624 if (err) { 3625 kfree_skb(skbhost_stats); 3626 goto exit_host_stats; 3627 } 3628 3629 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3630 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3631 nlhhost_stats->nlmsg_len = actual_size; 3632 3633 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3634 GFP_KERNEL); 3635 } while (err < 0 && err != -ECONNREFUSED); 3636 3637 exit_host_stats: 3638 scsi_host_put(shost); 3639 return err; 3640 } 3641 3642 3643 static int 3644 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3645 { 3646 int err = 0; 3647 u32 portid; 3648 u32 pdu_len; 3649 struct iscsi_uevent *ev = nlmsg_data(nlh); 3650 struct iscsi_transport *transport = NULL; 3651 struct iscsi_internal *priv; 3652 struct iscsi_cls_session *session; 3653 struct iscsi_cls_conn *conn; 3654 struct iscsi_endpoint *ep = NULL; 3655 3656 if (!netlink_capable(skb, CAP_SYS_ADMIN)) 3657 return -EPERM; 3658 3659 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3660 *group = ISCSI_NL_GRP_UIP; 3661 else 3662 *group = ISCSI_NL_GRP_ISCSID; 3663 3664 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3665 if (!priv) 3666 return -EINVAL; 3667 transport = priv->iscsi_transport; 3668 3669 if (!try_module_get(transport->owner)) 3670 return -EINVAL; 3671 3672 portid = NETLINK_CB(skb).portid; 3673 3674 switch (nlh->nlmsg_type) { 3675 case ISCSI_UEVENT_CREATE_SESSION: 3676 err = iscsi_if_create_session(priv, ep, ev, 3677 portid, 3678 ev->u.c_session.initial_cmdsn, 3679 ev->u.c_session.cmds_max, 3680 ev->u.c_session.queue_depth); 3681 break; 3682 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3683 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3684 if (!ep) { 3685 err = -EINVAL; 3686 break; 3687 } 3688 3689 err = iscsi_if_create_session(priv, ep, ev, 3690 portid, 3691 ev->u.c_bound_session.initial_cmdsn, 3692 ev->u.c_bound_session.cmds_max, 3693 ev->u.c_bound_session.queue_depth); 3694 break; 3695 case ISCSI_UEVENT_DESTROY_SESSION: 3696 session = iscsi_session_lookup(ev->u.d_session.sid); 3697 if (!session) 3698 err = -EINVAL; 3699 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3700 err = -EBUSY; 3701 else 3702 transport->destroy_session(session); 3703 break; 3704 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3705 session = iscsi_session_lookup(ev->u.d_session.sid); 3706 if (!session) 3707 err = -EINVAL; 3708 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3709 err = -EBUSY; 3710 else { 3711 unsigned long flags; 3712 3713 /* Prevent this session from being found again */ 3714 spin_lock_irqsave(&sesslock, flags); 3715 list_del_init(&session->sess_list); 3716 spin_unlock_irqrestore(&sesslock, flags); 3717 3718 queue_work(iscsi_destroy_workq, &session->destroy_work); 3719 } 3720 break; 3721 case ISCSI_UEVENT_UNBIND_SESSION: 3722 session = iscsi_session_lookup(ev->u.d_session.sid); 3723 if (session) 3724 scsi_queue_work(iscsi_session_to_shost(session), 3725 &session->unbind_work); 3726 else 3727 err = -EINVAL; 3728 break; 3729 case ISCSI_UEVENT_CREATE_CONN: 3730 err = iscsi_if_create_conn(transport, ev); 3731 break; 3732 case ISCSI_UEVENT_DESTROY_CONN: 3733 err = iscsi_if_destroy_conn(transport, ev); 3734 break; 3735 case ISCSI_UEVENT_BIND_CONN: 3736 session = iscsi_session_lookup(ev->u.b_conn.sid); 3737 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3738 3739 if (conn && conn->ep) 3740 iscsi_if_ep_disconnect(transport, conn->ep->id); 3741 3742 if (!session || !conn) { 3743 err = -EINVAL; 3744 break; 3745 } 3746 3747 mutex_lock(&conn_mutex); 3748 ev->r.retcode = transport->bind_conn(session, conn, 3749 ev->u.b_conn.transport_eph, 3750 ev->u.b_conn.is_leading); 3751 if (!ev->r.retcode) 3752 conn->state = ISCSI_CONN_BOUND; 3753 mutex_unlock(&conn_mutex); 3754 3755 if (ev->r.retcode || !transport->ep_connect) 3756 break; 3757 3758 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3759 if (ep) { 3760 ep->conn = conn; 3761 3762 mutex_lock(&conn->ep_mutex); 3763 conn->ep = ep; 3764 mutex_unlock(&conn->ep_mutex); 3765 } else 3766 iscsi_cls_conn_printk(KERN_ERR, conn, 3767 "Could not set ep conn " 3768 "binding\n"); 3769 break; 3770 case ISCSI_UEVENT_SET_PARAM: 3771 err = iscsi_set_param(transport, ev); 3772 break; 3773 case ISCSI_UEVENT_START_CONN: 3774 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3775 if (conn) { 3776 mutex_lock(&conn_mutex); 3777 ev->r.retcode = transport->start_conn(conn); 3778 if (!ev->r.retcode) 3779 conn->state = ISCSI_CONN_UP; 3780 mutex_unlock(&conn_mutex); 3781 } 3782 else 3783 err = -EINVAL; 3784 break; 3785 case ISCSI_UEVENT_STOP_CONN: 3786 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3787 if (conn) 3788 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3789 else 3790 err = -EINVAL; 3791 break; 3792 case ISCSI_UEVENT_SEND_PDU: 3793 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev); 3794 3795 if ((ev->u.send_pdu.hdr_size > pdu_len) || 3796 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) { 3797 err = -EINVAL; 3798 break; 3799 } 3800 3801 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3802 if (conn) { 3803 mutex_lock(&conn_mutex); 3804 ev->r.retcode = transport->send_pdu(conn, 3805 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3806 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3807 ev->u.send_pdu.data_size); 3808 mutex_unlock(&conn_mutex); 3809 } 3810 else 3811 err = -EINVAL; 3812 break; 3813 case ISCSI_UEVENT_GET_STATS: 3814 err = iscsi_if_get_stats(transport, nlh); 3815 break; 3816 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3817 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3818 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3819 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3820 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3821 break; 3822 case ISCSI_UEVENT_TGT_DSCVR: 3823 err = iscsi_tgt_dscvr(transport, ev); 3824 break; 3825 case ISCSI_UEVENT_SET_HOST_PARAM: 3826 err = iscsi_set_host_param(transport, ev); 3827 break; 3828 case ISCSI_UEVENT_PATH_UPDATE: 3829 err = iscsi_set_path(transport, ev); 3830 break; 3831 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3832 err = iscsi_set_iface_params(transport, ev, 3833 nlmsg_attrlen(nlh, sizeof(*ev))); 3834 break; 3835 case ISCSI_UEVENT_PING: 3836 err = iscsi_send_ping(transport, ev); 3837 break; 3838 case ISCSI_UEVENT_GET_CHAP: 3839 err = iscsi_get_chap(transport, nlh); 3840 break; 3841 case ISCSI_UEVENT_DELETE_CHAP: 3842 err = iscsi_delete_chap(transport, ev); 3843 break; 3844 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3845 err = iscsi_set_flashnode_param(transport, ev, 3846 nlmsg_attrlen(nlh, 3847 sizeof(*ev))); 3848 break; 3849 case ISCSI_UEVENT_NEW_FLASHNODE: 3850 err = iscsi_new_flashnode(transport, ev, 3851 nlmsg_attrlen(nlh, sizeof(*ev))); 3852 break; 3853 case ISCSI_UEVENT_DEL_FLASHNODE: 3854 err = iscsi_del_flashnode(transport, ev); 3855 break; 3856 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3857 err = iscsi_login_flashnode(transport, ev); 3858 break; 3859 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3860 err = iscsi_logout_flashnode(transport, ev); 3861 break; 3862 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3863 err = iscsi_logout_flashnode_sid(transport, ev); 3864 break; 3865 case ISCSI_UEVENT_SET_CHAP: 3866 err = iscsi_set_chap(transport, ev, 3867 nlmsg_attrlen(nlh, sizeof(*ev))); 3868 break; 3869 case ISCSI_UEVENT_GET_HOST_STATS: 3870 err = iscsi_get_host_stats(transport, nlh); 3871 break; 3872 default: 3873 err = -ENOSYS; 3874 break; 3875 } 3876 3877 module_put(transport->owner); 3878 return err; 3879 } 3880 3881 /* 3882 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3883 * Malformed skbs with wrong lengths or invalid creds are not processed. 3884 */ 3885 static void 3886 iscsi_if_rx(struct sk_buff *skb) 3887 { 3888 u32 portid = NETLINK_CB(skb).portid; 3889 3890 mutex_lock(&rx_queue_mutex); 3891 while (skb->len >= NLMSG_HDRLEN) { 3892 int err; 3893 uint32_t rlen; 3894 struct nlmsghdr *nlh; 3895 struct iscsi_uevent *ev; 3896 uint32_t group; 3897 int retries = ISCSI_SEND_MAX_ALLOWED; 3898 3899 nlh = nlmsg_hdr(skb); 3900 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3901 skb->len < nlh->nlmsg_len) { 3902 break; 3903 } 3904 3905 ev = nlmsg_data(nlh); 3906 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3907 if (rlen > skb->len) 3908 rlen = skb->len; 3909 3910 err = iscsi_if_recv_msg(skb, nlh, &group); 3911 if (err) { 3912 ev->type = ISCSI_KEVENT_IF_ERROR; 3913 ev->iferror = err; 3914 } 3915 do { 3916 /* 3917 * special case for GET_STATS: 3918 * on success - sending reply and stats from 3919 * inside of if_recv_msg(), 3920 * on error - fall through. 3921 */ 3922 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3923 break; 3924 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3925 break; 3926 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3927 ev, sizeof(*ev)); 3928 if (err == -EAGAIN && --retries < 0) { 3929 printk(KERN_WARNING "Send reply failed, error %d\n", err); 3930 break; 3931 } 3932 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3933 skb_pull(skb, rlen); 3934 } 3935 mutex_unlock(&rx_queue_mutex); 3936 } 3937 3938 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3939 struct device_attribute dev_attr_##_prefix##_##_name = \ 3940 __ATTR(_name,_mode,_show,_store) 3941 3942 /* 3943 * iSCSI connection attrs 3944 */ 3945 #define iscsi_conn_attr_show(param) \ 3946 static ssize_t \ 3947 show_conn_param_##param(struct device *dev, \ 3948 struct device_attribute *attr, char *buf) \ 3949 { \ 3950 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3951 struct iscsi_transport *t = conn->transport; \ 3952 return t->get_conn_param(conn, param, buf); \ 3953 } 3954 3955 #define iscsi_conn_attr(field, param) \ 3956 iscsi_conn_attr_show(param) \ 3957 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3958 NULL); 3959 3960 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3961 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3962 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3963 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3964 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3965 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3966 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3967 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3968 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3969 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3970 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3971 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3972 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3973 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3974 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3975 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3976 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3977 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3978 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3979 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3980 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3981 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3982 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3983 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3984 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3985 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3986 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3987 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3988 3989 static const char *const connection_state_names[] = { 3990 [ISCSI_CONN_UP] = "up", 3991 [ISCSI_CONN_DOWN] = "down", 3992 [ISCSI_CONN_FAILED] = "failed", 3993 [ISCSI_CONN_BOUND] = "bound" 3994 }; 3995 3996 static ssize_t show_conn_state(struct device *dev, 3997 struct device_attribute *attr, char *buf) 3998 { 3999 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 4000 const char *state = "unknown"; 4001 4002 if (conn->state >= 0 && 4003 conn->state < ARRAY_SIZE(connection_state_names)) 4004 state = connection_state_names[conn->state]; 4005 4006 return sysfs_emit(buf, "%s\n", state); 4007 } 4008 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 4009 NULL); 4010 4011 #define iscsi_conn_ep_attr_show(param) \ 4012 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 4013 struct device_attribute *attr,\ 4014 char *buf) \ 4015 { \ 4016 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4017 struct iscsi_transport *t = conn->transport; \ 4018 struct iscsi_endpoint *ep; \ 4019 ssize_t rc; \ 4020 \ 4021 /* \ 4022 * Need to make sure ep_disconnect does not free the LLD's \ 4023 * interconnect resources while we are trying to read them. \ 4024 */ \ 4025 mutex_lock(&conn->ep_mutex); \ 4026 ep = conn->ep; \ 4027 if (!ep && t->ep_connect) { \ 4028 mutex_unlock(&conn->ep_mutex); \ 4029 return -ENOTCONN; \ 4030 } \ 4031 \ 4032 if (ep) \ 4033 rc = t->get_ep_param(ep, param, buf); \ 4034 else \ 4035 rc = t->get_conn_param(conn, param, buf); \ 4036 mutex_unlock(&conn->ep_mutex); \ 4037 return rc; \ 4038 } 4039 4040 #define iscsi_conn_ep_attr(field, param) \ 4041 iscsi_conn_ep_attr_show(param) \ 4042 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4043 show_conn_ep_param_##param, NULL); 4044 4045 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4046 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4047 4048 static struct attribute *iscsi_conn_attrs[] = { 4049 &dev_attr_conn_max_recv_dlength.attr, 4050 &dev_attr_conn_max_xmit_dlength.attr, 4051 &dev_attr_conn_header_digest.attr, 4052 &dev_attr_conn_data_digest.attr, 4053 &dev_attr_conn_ifmarker.attr, 4054 &dev_attr_conn_ofmarker.attr, 4055 &dev_attr_conn_address.attr, 4056 &dev_attr_conn_port.attr, 4057 &dev_attr_conn_exp_statsn.attr, 4058 &dev_attr_conn_persistent_address.attr, 4059 &dev_attr_conn_persistent_port.attr, 4060 &dev_attr_conn_ping_tmo.attr, 4061 &dev_attr_conn_recv_tmo.attr, 4062 &dev_attr_conn_local_port.attr, 4063 &dev_attr_conn_statsn.attr, 4064 &dev_attr_conn_keepalive_tmo.attr, 4065 &dev_attr_conn_max_segment_size.attr, 4066 &dev_attr_conn_tcp_timestamp_stat.attr, 4067 &dev_attr_conn_tcp_wsf_disable.attr, 4068 &dev_attr_conn_tcp_nagle_disable.attr, 4069 &dev_attr_conn_tcp_timer_scale.attr, 4070 &dev_attr_conn_tcp_timestamp_enable.attr, 4071 &dev_attr_conn_fragment_disable.attr, 4072 &dev_attr_conn_ipv4_tos.attr, 4073 &dev_attr_conn_ipv6_traffic_class.attr, 4074 &dev_attr_conn_ipv6_flow_label.attr, 4075 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4076 &dev_attr_conn_tcp_xmit_wsf.attr, 4077 &dev_attr_conn_tcp_recv_wsf.attr, 4078 &dev_attr_conn_local_ipaddr.attr, 4079 &dev_attr_conn_state.attr, 4080 NULL, 4081 }; 4082 4083 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4084 struct attribute *attr, int i) 4085 { 4086 struct device *cdev = container_of(kobj, struct device, kobj); 4087 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4088 struct iscsi_transport *t = conn->transport; 4089 int param; 4090 4091 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4092 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4093 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4094 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4095 else if (attr == &dev_attr_conn_header_digest.attr) 4096 param = ISCSI_PARAM_HDRDGST_EN; 4097 else if (attr == &dev_attr_conn_data_digest.attr) 4098 param = ISCSI_PARAM_DATADGST_EN; 4099 else if (attr == &dev_attr_conn_ifmarker.attr) 4100 param = ISCSI_PARAM_IFMARKER_EN; 4101 else if (attr == &dev_attr_conn_ofmarker.attr) 4102 param = ISCSI_PARAM_OFMARKER_EN; 4103 else if (attr == &dev_attr_conn_address.attr) 4104 param = ISCSI_PARAM_CONN_ADDRESS; 4105 else if (attr == &dev_attr_conn_port.attr) 4106 param = ISCSI_PARAM_CONN_PORT; 4107 else if (attr == &dev_attr_conn_exp_statsn.attr) 4108 param = ISCSI_PARAM_EXP_STATSN; 4109 else if (attr == &dev_attr_conn_persistent_address.attr) 4110 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4111 else if (attr == &dev_attr_conn_persistent_port.attr) 4112 param = ISCSI_PARAM_PERSISTENT_PORT; 4113 else if (attr == &dev_attr_conn_ping_tmo.attr) 4114 param = ISCSI_PARAM_PING_TMO; 4115 else if (attr == &dev_attr_conn_recv_tmo.attr) 4116 param = ISCSI_PARAM_RECV_TMO; 4117 else if (attr == &dev_attr_conn_local_port.attr) 4118 param = ISCSI_PARAM_LOCAL_PORT; 4119 else if (attr == &dev_attr_conn_statsn.attr) 4120 param = ISCSI_PARAM_STATSN; 4121 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4122 param = ISCSI_PARAM_KEEPALIVE_TMO; 4123 else if (attr == &dev_attr_conn_max_segment_size.attr) 4124 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4125 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4126 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4127 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4128 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4129 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4130 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4131 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4132 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4133 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4134 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4135 else if (attr == &dev_attr_conn_fragment_disable.attr) 4136 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4137 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4138 param = ISCSI_PARAM_IPV4_TOS; 4139 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4140 param = ISCSI_PARAM_IPV6_TC; 4141 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4142 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4143 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4144 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4145 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4146 param = ISCSI_PARAM_TCP_XMIT_WSF; 4147 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4148 param = ISCSI_PARAM_TCP_RECV_WSF; 4149 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4150 param = ISCSI_PARAM_LOCAL_IPADDR; 4151 else if (attr == &dev_attr_conn_state.attr) 4152 return S_IRUGO; 4153 else { 4154 WARN_ONCE(1, "Invalid conn attr"); 4155 return 0; 4156 } 4157 4158 return t->attr_is_visible(ISCSI_PARAM, param); 4159 } 4160 4161 static struct attribute_group iscsi_conn_group = { 4162 .attrs = iscsi_conn_attrs, 4163 .is_visible = iscsi_conn_attr_is_visible, 4164 }; 4165 4166 /* 4167 * iSCSI session attrs 4168 */ 4169 #define iscsi_session_attr_show(param, perm) \ 4170 static ssize_t \ 4171 show_session_param_##param(struct device *dev, \ 4172 struct device_attribute *attr, char *buf) \ 4173 { \ 4174 struct iscsi_cls_session *session = \ 4175 iscsi_dev_to_session(dev->parent); \ 4176 struct iscsi_transport *t = session->transport; \ 4177 \ 4178 if (perm && !capable(CAP_SYS_ADMIN)) \ 4179 return -EACCES; \ 4180 return t->get_session_param(session, param, buf); \ 4181 } 4182 4183 #define iscsi_session_attr(field, param, perm) \ 4184 iscsi_session_attr_show(param, perm) \ 4185 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4186 NULL); 4187 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4188 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4189 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4190 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4191 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4192 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4193 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4194 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4195 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4196 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4197 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4198 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4199 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4200 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4201 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4202 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4203 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4204 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4205 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4206 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4207 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4208 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4209 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4210 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4211 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4212 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4213 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4214 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4215 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4216 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4217 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4218 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4219 iscsi_session_attr(discovery_auth_optional, 4220 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4221 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4222 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4223 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4224 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4225 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4226 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4227 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4228 4229 static ssize_t 4230 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4231 char *buf) 4232 { 4233 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4234 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state)); 4235 } 4236 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4237 NULL); 4238 static ssize_t 4239 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4240 char *buf) 4241 { 4242 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4243 return sysfs_emit(buf, "%d\n", session->creator); 4244 } 4245 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4246 NULL); 4247 static ssize_t 4248 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4249 char *buf) 4250 { 4251 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4252 return sysfs_emit(buf, "%d\n", session->target_id); 4253 } 4254 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4255 show_priv_session_target_id, NULL); 4256 4257 #define iscsi_priv_session_attr_show(field, format) \ 4258 static ssize_t \ 4259 show_priv_session_##field(struct device *dev, \ 4260 struct device_attribute *attr, char *buf) \ 4261 { \ 4262 struct iscsi_cls_session *session = \ 4263 iscsi_dev_to_session(dev->parent); \ 4264 if (session->field == -1) \ 4265 return sysfs_emit(buf, "off\n"); \ 4266 return sysfs_emit(buf, format"\n", session->field); \ 4267 } 4268 4269 #define iscsi_priv_session_attr_store(field) \ 4270 static ssize_t \ 4271 store_priv_session_##field(struct device *dev, \ 4272 struct device_attribute *attr, \ 4273 const char *buf, size_t count) \ 4274 { \ 4275 int val; \ 4276 char *cp; \ 4277 struct iscsi_cls_session *session = \ 4278 iscsi_dev_to_session(dev->parent); \ 4279 if ((session->state == ISCSI_SESSION_FREE) || \ 4280 (session->state == ISCSI_SESSION_FAILED)) \ 4281 return -EBUSY; \ 4282 if (strncmp(buf, "off", 3) == 0) { \ 4283 session->field = -1; \ 4284 session->field##_sysfs_override = true; \ 4285 } else { \ 4286 val = simple_strtoul(buf, &cp, 0); \ 4287 if (*cp != '\0' && *cp != '\n') \ 4288 return -EINVAL; \ 4289 session->field = val; \ 4290 session->field##_sysfs_override = true; \ 4291 } \ 4292 return count; \ 4293 } 4294 4295 #define iscsi_priv_session_rw_attr(field, format) \ 4296 iscsi_priv_session_attr_show(field, format) \ 4297 iscsi_priv_session_attr_store(field) \ 4298 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4299 show_priv_session_##field, \ 4300 store_priv_session_##field) 4301 4302 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4303 4304 static struct attribute *iscsi_session_attrs[] = { 4305 &dev_attr_sess_initial_r2t.attr, 4306 &dev_attr_sess_max_outstanding_r2t.attr, 4307 &dev_attr_sess_immediate_data.attr, 4308 &dev_attr_sess_first_burst_len.attr, 4309 &dev_attr_sess_max_burst_len.attr, 4310 &dev_attr_sess_data_pdu_in_order.attr, 4311 &dev_attr_sess_data_seq_in_order.attr, 4312 &dev_attr_sess_erl.attr, 4313 &dev_attr_sess_targetname.attr, 4314 &dev_attr_sess_tpgt.attr, 4315 &dev_attr_sess_password.attr, 4316 &dev_attr_sess_password_in.attr, 4317 &dev_attr_sess_username.attr, 4318 &dev_attr_sess_username_in.attr, 4319 &dev_attr_sess_fast_abort.attr, 4320 &dev_attr_sess_abort_tmo.attr, 4321 &dev_attr_sess_lu_reset_tmo.attr, 4322 &dev_attr_sess_tgt_reset_tmo.attr, 4323 &dev_attr_sess_ifacename.attr, 4324 &dev_attr_sess_initiatorname.attr, 4325 &dev_attr_sess_targetalias.attr, 4326 &dev_attr_sess_boot_root.attr, 4327 &dev_attr_sess_boot_nic.attr, 4328 &dev_attr_sess_boot_target.attr, 4329 &dev_attr_priv_sess_recovery_tmo.attr, 4330 &dev_attr_priv_sess_state.attr, 4331 &dev_attr_priv_sess_creator.attr, 4332 &dev_attr_sess_chap_out_idx.attr, 4333 &dev_attr_sess_chap_in_idx.attr, 4334 &dev_attr_priv_sess_target_id.attr, 4335 &dev_attr_sess_auto_snd_tgt_disable.attr, 4336 &dev_attr_sess_discovery_session.attr, 4337 &dev_attr_sess_portal_type.attr, 4338 &dev_attr_sess_chap_auth.attr, 4339 &dev_attr_sess_discovery_logout.attr, 4340 &dev_attr_sess_bidi_chap.attr, 4341 &dev_attr_sess_discovery_auth_optional.attr, 4342 &dev_attr_sess_def_time2wait.attr, 4343 &dev_attr_sess_def_time2retain.attr, 4344 &dev_attr_sess_isid.attr, 4345 &dev_attr_sess_tsid.attr, 4346 &dev_attr_sess_def_taskmgmt_tmo.attr, 4347 &dev_attr_sess_discovery_parent_idx.attr, 4348 &dev_attr_sess_discovery_parent_type.attr, 4349 NULL, 4350 }; 4351 4352 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4353 struct attribute *attr, int i) 4354 { 4355 struct device *cdev = container_of(kobj, struct device, kobj); 4356 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4357 struct iscsi_transport *t = session->transport; 4358 int param; 4359 4360 if (attr == &dev_attr_sess_initial_r2t.attr) 4361 param = ISCSI_PARAM_INITIAL_R2T_EN; 4362 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4363 param = ISCSI_PARAM_MAX_R2T; 4364 else if (attr == &dev_attr_sess_immediate_data.attr) 4365 param = ISCSI_PARAM_IMM_DATA_EN; 4366 else if (attr == &dev_attr_sess_first_burst_len.attr) 4367 param = ISCSI_PARAM_FIRST_BURST; 4368 else if (attr == &dev_attr_sess_max_burst_len.attr) 4369 param = ISCSI_PARAM_MAX_BURST; 4370 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4371 param = ISCSI_PARAM_PDU_INORDER_EN; 4372 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4373 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4374 else if (attr == &dev_attr_sess_erl.attr) 4375 param = ISCSI_PARAM_ERL; 4376 else if (attr == &dev_attr_sess_targetname.attr) 4377 param = ISCSI_PARAM_TARGET_NAME; 4378 else if (attr == &dev_attr_sess_tpgt.attr) 4379 param = ISCSI_PARAM_TPGT; 4380 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4381 param = ISCSI_PARAM_CHAP_IN_IDX; 4382 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4383 param = ISCSI_PARAM_CHAP_OUT_IDX; 4384 else if (attr == &dev_attr_sess_password.attr) 4385 param = ISCSI_PARAM_USERNAME; 4386 else if (attr == &dev_attr_sess_password_in.attr) 4387 param = ISCSI_PARAM_USERNAME_IN; 4388 else if (attr == &dev_attr_sess_username.attr) 4389 param = ISCSI_PARAM_PASSWORD; 4390 else if (attr == &dev_attr_sess_username_in.attr) 4391 param = ISCSI_PARAM_PASSWORD_IN; 4392 else if (attr == &dev_attr_sess_fast_abort.attr) 4393 param = ISCSI_PARAM_FAST_ABORT; 4394 else if (attr == &dev_attr_sess_abort_tmo.attr) 4395 param = ISCSI_PARAM_ABORT_TMO; 4396 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4397 param = ISCSI_PARAM_LU_RESET_TMO; 4398 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4399 param = ISCSI_PARAM_TGT_RESET_TMO; 4400 else if (attr == &dev_attr_sess_ifacename.attr) 4401 param = ISCSI_PARAM_IFACE_NAME; 4402 else if (attr == &dev_attr_sess_initiatorname.attr) 4403 param = ISCSI_PARAM_INITIATOR_NAME; 4404 else if (attr == &dev_attr_sess_targetalias.attr) 4405 param = ISCSI_PARAM_TARGET_ALIAS; 4406 else if (attr == &dev_attr_sess_boot_root.attr) 4407 param = ISCSI_PARAM_BOOT_ROOT; 4408 else if (attr == &dev_attr_sess_boot_nic.attr) 4409 param = ISCSI_PARAM_BOOT_NIC; 4410 else if (attr == &dev_attr_sess_boot_target.attr) 4411 param = ISCSI_PARAM_BOOT_TARGET; 4412 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4413 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4414 else if (attr == &dev_attr_sess_discovery_session.attr) 4415 param = ISCSI_PARAM_DISCOVERY_SESS; 4416 else if (attr == &dev_attr_sess_portal_type.attr) 4417 param = ISCSI_PARAM_PORTAL_TYPE; 4418 else if (attr == &dev_attr_sess_chap_auth.attr) 4419 param = ISCSI_PARAM_CHAP_AUTH_EN; 4420 else if (attr == &dev_attr_sess_discovery_logout.attr) 4421 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4422 else if (attr == &dev_attr_sess_bidi_chap.attr) 4423 param = ISCSI_PARAM_BIDI_CHAP_EN; 4424 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4425 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4426 else if (attr == &dev_attr_sess_def_time2wait.attr) 4427 param = ISCSI_PARAM_DEF_TIME2WAIT; 4428 else if (attr == &dev_attr_sess_def_time2retain.attr) 4429 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4430 else if (attr == &dev_attr_sess_isid.attr) 4431 param = ISCSI_PARAM_ISID; 4432 else if (attr == &dev_attr_sess_tsid.attr) 4433 param = ISCSI_PARAM_TSID; 4434 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4435 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4436 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4437 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4438 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4439 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4440 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4441 return S_IRUGO | S_IWUSR; 4442 else if (attr == &dev_attr_priv_sess_state.attr) 4443 return S_IRUGO; 4444 else if (attr == &dev_attr_priv_sess_creator.attr) 4445 return S_IRUGO; 4446 else if (attr == &dev_attr_priv_sess_target_id.attr) 4447 return S_IRUGO; 4448 else { 4449 WARN_ONCE(1, "Invalid session attr"); 4450 return 0; 4451 } 4452 4453 return t->attr_is_visible(ISCSI_PARAM, param); 4454 } 4455 4456 static struct attribute_group iscsi_session_group = { 4457 .attrs = iscsi_session_attrs, 4458 .is_visible = iscsi_session_attr_is_visible, 4459 }; 4460 4461 /* 4462 * iSCSI host attrs 4463 */ 4464 #define iscsi_host_attr_show(param) \ 4465 static ssize_t \ 4466 show_host_param_##param(struct device *dev, \ 4467 struct device_attribute *attr, char *buf) \ 4468 { \ 4469 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4470 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4471 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4472 } 4473 4474 #define iscsi_host_attr(field, param) \ 4475 iscsi_host_attr_show(param) \ 4476 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4477 NULL); 4478 4479 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4480 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4481 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4482 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4483 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4484 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4485 4486 static struct attribute *iscsi_host_attrs[] = { 4487 &dev_attr_host_netdev.attr, 4488 &dev_attr_host_hwaddress.attr, 4489 &dev_attr_host_ipaddress.attr, 4490 &dev_attr_host_initiatorname.attr, 4491 &dev_attr_host_port_state.attr, 4492 &dev_attr_host_port_speed.attr, 4493 NULL, 4494 }; 4495 4496 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4497 struct attribute *attr, int i) 4498 { 4499 struct device *cdev = container_of(kobj, struct device, kobj); 4500 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4501 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4502 int param; 4503 4504 if (attr == &dev_attr_host_netdev.attr) 4505 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4506 else if (attr == &dev_attr_host_hwaddress.attr) 4507 param = ISCSI_HOST_PARAM_HWADDRESS; 4508 else if (attr == &dev_attr_host_ipaddress.attr) 4509 param = ISCSI_HOST_PARAM_IPADDRESS; 4510 else if (attr == &dev_attr_host_initiatorname.attr) 4511 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4512 else if (attr == &dev_attr_host_port_state.attr) 4513 param = ISCSI_HOST_PARAM_PORT_STATE; 4514 else if (attr == &dev_attr_host_port_speed.attr) 4515 param = ISCSI_HOST_PARAM_PORT_SPEED; 4516 else { 4517 WARN_ONCE(1, "Invalid host attr"); 4518 return 0; 4519 } 4520 4521 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4522 } 4523 4524 static struct attribute_group iscsi_host_group = { 4525 .attrs = iscsi_host_attrs, 4526 .is_visible = iscsi_host_attr_is_visible, 4527 }; 4528 4529 /* convert iscsi_port_speed values to ascii string name */ 4530 static const struct { 4531 enum iscsi_port_speed value; 4532 char *name; 4533 } iscsi_port_speed_names[] = { 4534 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4535 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4536 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4537 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4538 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4539 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4540 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4541 }; 4542 4543 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4544 { 4545 int i; 4546 char *speed = "Unknown!"; 4547 struct iscsi_cls_host *ihost = shost->shost_data; 4548 uint32_t port_speed = ihost->port_speed; 4549 4550 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4551 if (iscsi_port_speed_names[i].value & port_speed) { 4552 speed = iscsi_port_speed_names[i].name; 4553 break; 4554 } 4555 } 4556 return speed; 4557 } 4558 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4559 4560 /* convert iscsi_port_state values to ascii string name */ 4561 static const struct { 4562 enum iscsi_port_state value; 4563 char *name; 4564 } iscsi_port_state_names[] = { 4565 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4566 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4567 }; 4568 4569 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4570 { 4571 int i; 4572 char *state = "Unknown!"; 4573 struct iscsi_cls_host *ihost = shost->shost_data; 4574 uint32_t port_state = ihost->port_state; 4575 4576 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4577 if (iscsi_port_state_names[i].value & port_state) { 4578 state = iscsi_port_state_names[i].name; 4579 break; 4580 } 4581 } 4582 return state; 4583 } 4584 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4585 4586 static int iscsi_session_match(struct attribute_container *cont, 4587 struct device *dev) 4588 { 4589 struct iscsi_cls_session *session; 4590 struct Scsi_Host *shost; 4591 struct iscsi_internal *priv; 4592 4593 if (!iscsi_is_session_dev(dev)) 4594 return 0; 4595 4596 session = iscsi_dev_to_session(dev); 4597 shost = iscsi_session_to_shost(session); 4598 if (!shost->transportt) 4599 return 0; 4600 4601 priv = to_iscsi_internal(shost->transportt); 4602 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4603 return 0; 4604 4605 return &priv->session_cont.ac == cont; 4606 } 4607 4608 static int iscsi_conn_match(struct attribute_container *cont, 4609 struct device *dev) 4610 { 4611 struct iscsi_cls_session *session; 4612 struct iscsi_cls_conn *conn; 4613 struct Scsi_Host *shost; 4614 struct iscsi_internal *priv; 4615 4616 if (!iscsi_is_conn_dev(dev)) 4617 return 0; 4618 4619 conn = iscsi_dev_to_conn(dev); 4620 session = iscsi_dev_to_session(conn->dev.parent); 4621 shost = iscsi_session_to_shost(session); 4622 4623 if (!shost->transportt) 4624 return 0; 4625 4626 priv = to_iscsi_internal(shost->transportt); 4627 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4628 return 0; 4629 4630 return &priv->conn_cont.ac == cont; 4631 } 4632 4633 static int iscsi_host_match(struct attribute_container *cont, 4634 struct device *dev) 4635 { 4636 struct Scsi_Host *shost; 4637 struct iscsi_internal *priv; 4638 4639 if (!scsi_is_host_device(dev)) 4640 return 0; 4641 4642 shost = dev_to_shost(dev); 4643 if (!shost->transportt || 4644 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4645 return 0; 4646 4647 priv = to_iscsi_internal(shost->transportt); 4648 return &priv->t.host_attrs.ac == cont; 4649 } 4650 4651 struct scsi_transport_template * 4652 iscsi_register_transport(struct iscsi_transport *tt) 4653 { 4654 struct iscsi_internal *priv; 4655 unsigned long flags; 4656 int err; 4657 4658 BUG_ON(!tt); 4659 4660 priv = iscsi_if_transport_lookup(tt); 4661 if (priv) 4662 return NULL; 4663 4664 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4665 if (!priv) 4666 return NULL; 4667 INIT_LIST_HEAD(&priv->list); 4668 priv->iscsi_transport = tt; 4669 priv->t.user_scan = iscsi_user_scan; 4670 priv->t.create_work_queue = 1; 4671 4672 priv->dev.class = &iscsi_transport_class; 4673 dev_set_name(&priv->dev, "%s", tt->name); 4674 err = device_register(&priv->dev); 4675 if (err) 4676 goto free_priv; 4677 4678 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4679 if (err) 4680 goto unregister_dev; 4681 4682 /* host parameters */ 4683 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4684 priv->t.host_attrs.ac.match = iscsi_host_match; 4685 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4686 priv->t.host_size = sizeof(struct iscsi_cls_host); 4687 transport_container_register(&priv->t.host_attrs); 4688 4689 /* connection parameters */ 4690 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4691 priv->conn_cont.ac.match = iscsi_conn_match; 4692 priv->conn_cont.ac.grp = &iscsi_conn_group; 4693 transport_container_register(&priv->conn_cont); 4694 4695 /* session parameters */ 4696 priv->session_cont.ac.class = &iscsi_session_class.class; 4697 priv->session_cont.ac.match = iscsi_session_match; 4698 priv->session_cont.ac.grp = &iscsi_session_group; 4699 transport_container_register(&priv->session_cont); 4700 4701 spin_lock_irqsave(&iscsi_transport_lock, flags); 4702 list_add(&priv->list, &iscsi_transports); 4703 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4704 4705 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4706 return &priv->t; 4707 4708 unregister_dev: 4709 device_unregister(&priv->dev); 4710 return NULL; 4711 free_priv: 4712 kfree(priv); 4713 return NULL; 4714 } 4715 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4716 4717 int iscsi_unregister_transport(struct iscsi_transport *tt) 4718 { 4719 struct iscsi_internal *priv; 4720 unsigned long flags; 4721 4722 BUG_ON(!tt); 4723 4724 mutex_lock(&rx_queue_mutex); 4725 4726 priv = iscsi_if_transport_lookup(tt); 4727 BUG_ON (!priv); 4728 4729 spin_lock_irqsave(&iscsi_transport_lock, flags); 4730 list_del(&priv->list); 4731 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4732 4733 transport_container_unregister(&priv->conn_cont); 4734 transport_container_unregister(&priv->session_cont); 4735 transport_container_unregister(&priv->t.host_attrs); 4736 4737 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4738 device_unregister(&priv->dev); 4739 mutex_unlock(&rx_queue_mutex); 4740 4741 return 0; 4742 } 4743 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4744 4745 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4746 struct device *dev, const char *fmt, ...) 4747 { 4748 struct va_format vaf; 4749 va_list args; 4750 4751 va_start(args, fmt); 4752 vaf.fmt = fmt; 4753 vaf.va = &args; 4754 trace(dev, &vaf); 4755 va_end(args); 4756 } 4757 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4758 4759 static __init int iscsi_transport_init(void) 4760 { 4761 int err; 4762 struct netlink_kernel_cfg cfg = { 4763 .groups = 1, 4764 .input = iscsi_if_rx, 4765 }; 4766 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4767 ISCSI_TRANSPORT_VERSION); 4768 4769 atomic_set(&iscsi_session_nr, 0); 4770 4771 err = class_register(&iscsi_transport_class); 4772 if (err) 4773 return err; 4774 4775 err = class_register(&iscsi_endpoint_class); 4776 if (err) 4777 goto unregister_transport_class; 4778 4779 err = class_register(&iscsi_iface_class); 4780 if (err) 4781 goto unregister_endpoint_class; 4782 4783 err = transport_class_register(&iscsi_host_class); 4784 if (err) 4785 goto unregister_iface_class; 4786 4787 err = transport_class_register(&iscsi_connection_class); 4788 if (err) 4789 goto unregister_host_class; 4790 4791 err = transport_class_register(&iscsi_session_class); 4792 if (err) 4793 goto unregister_conn_class; 4794 4795 err = bus_register(&iscsi_flashnode_bus); 4796 if (err) 4797 goto unregister_session_class; 4798 4799 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4800 if (!nls) { 4801 err = -ENOBUFS; 4802 goto unregister_flashnode_bus; 4803 } 4804 4805 iscsi_eh_timer_workq = alloc_workqueue("%s", 4806 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4807 1, "iscsi_eh"); 4808 if (!iscsi_eh_timer_workq) { 4809 err = -ENOMEM; 4810 goto release_nls; 4811 } 4812 4813 iscsi_destroy_workq = alloc_workqueue("%s", 4814 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND, 4815 1, "iscsi_destroy"); 4816 if (!iscsi_destroy_workq) { 4817 err = -ENOMEM; 4818 goto destroy_wq; 4819 } 4820 4821 return 0; 4822 4823 destroy_wq: 4824 destroy_workqueue(iscsi_eh_timer_workq); 4825 release_nls: 4826 netlink_kernel_release(nls); 4827 unregister_flashnode_bus: 4828 bus_unregister(&iscsi_flashnode_bus); 4829 unregister_session_class: 4830 transport_class_unregister(&iscsi_session_class); 4831 unregister_conn_class: 4832 transport_class_unregister(&iscsi_connection_class); 4833 unregister_host_class: 4834 transport_class_unregister(&iscsi_host_class); 4835 unregister_iface_class: 4836 class_unregister(&iscsi_iface_class); 4837 unregister_endpoint_class: 4838 class_unregister(&iscsi_endpoint_class); 4839 unregister_transport_class: 4840 class_unregister(&iscsi_transport_class); 4841 return err; 4842 } 4843 4844 static void __exit iscsi_transport_exit(void) 4845 { 4846 destroy_workqueue(iscsi_destroy_workq); 4847 destroy_workqueue(iscsi_eh_timer_workq); 4848 netlink_kernel_release(nls); 4849 bus_unregister(&iscsi_flashnode_bus); 4850 transport_class_unregister(&iscsi_connection_class); 4851 transport_class_unregister(&iscsi_session_class); 4852 transport_class_unregister(&iscsi_host_class); 4853 class_unregister(&iscsi_endpoint_class); 4854 class_unregister(&iscsi_iface_class); 4855 class_unregister(&iscsi_transport_class); 4856 } 4857 4858 module_init(iscsi_transport_init); 4859 module_exit(iscsi_transport_exit); 4860 4861 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4862 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4863 "Alex Aizman <itn780@yahoo.com>"); 4864 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4865 MODULE_LICENSE("GPL"); 4866 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4867 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4868