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 static DEFINE_IDR(iscsi_ep_idr); 90 static DEFINE_MUTEX(iscsi_ep_idr_mutex); 91 92 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ 93 94 static struct workqueue_struct *iscsi_conn_cleanup_workq; 95 96 static DEFINE_IDA(iscsi_sess_ida); 97 /* 98 * list of registered transports and lock that must 99 * be held while accessing list. The iscsi_transport_lock must 100 * be acquired after the rx_queue_mutex. 101 */ 102 static LIST_HEAD(iscsi_transports); 103 static DEFINE_SPINLOCK(iscsi_transport_lock); 104 105 #define to_iscsi_internal(tmpl) \ 106 container_of(tmpl, struct iscsi_internal, t) 107 108 #define dev_to_iscsi_internal(_dev) \ 109 container_of(_dev, struct iscsi_internal, dev) 110 111 static void iscsi_transport_release(struct device *dev) 112 { 113 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 114 kfree(priv); 115 } 116 117 /* 118 * iscsi_transport_class represents the iscsi_transports that are 119 * registered. 120 */ 121 static struct class iscsi_transport_class = { 122 .name = "iscsi_transport", 123 .dev_release = iscsi_transport_release, 124 }; 125 126 static ssize_t 127 show_transport_handle(struct device *dev, struct device_attribute *attr, 128 char *buf) 129 { 130 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 131 132 if (!capable(CAP_SYS_ADMIN)) 133 return -EACCES; 134 return sysfs_emit(buf, "%llu\n", 135 (unsigned long long)iscsi_handle(priv->iscsi_transport)); 136 } 137 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); 138 139 #define show_transport_attr(name, format) \ 140 static ssize_t \ 141 show_transport_##name(struct device *dev, \ 142 struct device_attribute *attr,char *buf) \ 143 { \ 144 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ 145 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\ 146 } \ 147 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); 148 149 show_transport_attr(caps, "0x%x"); 150 151 static struct attribute *iscsi_transport_attrs[] = { 152 &dev_attr_handle.attr, 153 &dev_attr_caps.attr, 154 NULL, 155 }; 156 157 static struct attribute_group iscsi_transport_group = { 158 .attrs = iscsi_transport_attrs, 159 }; 160 161 /* 162 * iSCSI endpoint attrs 163 */ 164 #define iscsi_dev_to_endpoint(_dev) \ 165 container_of(_dev, struct iscsi_endpoint, dev) 166 167 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ 168 struct device_attribute dev_attr_##_prefix##_##_name = \ 169 __ATTR(_name,_mode,_show,_store) 170 171 static void iscsi_endpoint_release(struct device *dev) 172 { 173 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 174 175 mutex_lock(&iscsi_ep_idr_mutex); 176 idr_remove(&iscsi_ep_idr, ep->id); 177 mutex_unlock(&iscsi_ep_idr_mutex); 178 179 kfree(ep); 180 } 181 182 static struct class iscsi_endpoint_class = { 183 .name = "iscsi_endpoint", 184 .dev_release = iscsi_endpoint_release, 185 }; 186 187 static ssize_t 188 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) 189 { 190 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 191 return sysfs_emit(buf, "%d\n", ep->id); 192 } 193 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); 194 195 static struct attribute *iscsi_endpoint_attrs[] = { 196 &dev_attr_ep_handle.attr, 197 NULL, 198 }; 199 200 static struct attribute_group iscsi_endpoint_group = { 201 .attrs = iscsi_endpoint_attrs, 202 }; 203 204 struct iscsi_endpoint * 205 iscsi_create_endpoint(int dd_size) 206 { 207 struct iscsi_endpoint *ep; 208 int err, id; 209 210 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); 211 if (!ep) 212 return NULL; 213 214 mutex_lock(&iscsi_ep_idr_mutex); 215 216 /* 217 * First endpoint id should be 1 to comply with user space 218 * applications (iscsid). 219 */ 220 id = idr_alloc(&iscsi_ep_idr, ep, 1, -1, GFP_NOIO); 221 if (id < 0) { 222 mutex_unlock(&iscsi_ep_idr_mutex); 223 printk(KERN_ERR "Could not allocate endpoint ID. Error %d.\n", 224 id); 225 goto free_ep; 226 } 227 mutex_unlock(&iscsi_ep_idr_mutex); 228 229 ep->id = id; 230 ep->dev.class = &iscsi_endpoint_class; 231 dev_set_name(&ep->dev, "ep-%d", id); 232 err = device_register(&ep->dev); 233 if (err) 234 goto free_id; 235 236 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); 237 if (err) 238 goto unregister_dev; 239 240 if (dd_size) 241 ep->dd_data = &ep[1]; 242 return ep; 243 244 unregister_dev: 245 device_unregister(&ep->dev); 246 return NULL; 247 248 free_id: 249 mutex_lock(&iscsi_ep_idr_mutex); 250 idr_remove(&iscsi_ep_idr, id); 251 mutex_unlock(&iscsi_ep_idr_mutex); 252 free_ep: 253 kfree(ep); 254 return NULL; 255 } 256 EXPORT_SYMBOL_GPL(iscsi_create_endpoint); 257 258 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) 259 { 260 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); 261 device_unregister(&ep->dev); 262 } 263 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); 264 265 void iscsi_put_endpoint(struct iscsi_endpoint *ep) 266 { 267 put_device(&ep->dev); 268 } 269 EXPORT_SYMBOL_GPL(iscsi_put_endpoint); 270 271 /** 272 * iscsi_lookup_endpoint - get ep from handle 273 * @handle: endpoint handle 274 * 275 * Caller must do a iscsi_put_endpoint. 276 */ 277 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 278 { 279 struct iscsi_endpoint *ep; 280 281 mutex_lock(&iscsi_ep_idr_mutex); 282 ep = idr_find(&iscsi_ep_idr, handle); 283 if (!ep) 284 goto unlock; 285 286 get_device(&ep->dev); 287 unlock: 288 mutex_unlock(&iscsi_ep_idr_mutex); 289 return ep; 290 } 291 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 292 293 /* 294 * Interface to display network param to sysfs 295 */ 296 297 static void iscsi_iface_release(struct device *dev) 298 { 299 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 300 struct device *parent = iface->dev.parent; 301 302 kfree(iface); 303 put_device(parent); 304 } 305 306 307 static struct class iscsi_iface_class = { 308 .name = "iscsi_iface", 309 .dev_release = iscsi_iface_release, 310 }; 311 312 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 313 struct device_attribute dev_attr_##_prefix##_##_name = \ 314 __ATTR(_name, _mode, _show, _store) 315 316 /* iface attrs show */ 317 #define iscsi_iface_attr_show(type, name, param_type, param) \ 318 static ssize_t \ 319 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 320 char *buf) \ 321 { \ 322 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 323 struct iscsi_transport *t = iface->transport; \ 324 return t->get_iface_param(iface, param_type, param, buf); \ 325 } \ 326 327 #define iscsi_iface_net_attr(type, name, param) \ 328 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 329 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 330 331 #define iscsi_iface_attr(type, name, param) \ 332 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 333 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 334 335 /* generic read only ipv4 attribute */ 336 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 337 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 338 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 339 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 340 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 341 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 342 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 343 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 344 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 345 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 346 iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 347 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 348 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 349 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 350 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 351 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 352 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 353 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 354 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 355 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 356 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 357 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 358 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 359 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 360 iscsi_iface_net_attr(ipv4_iface, fragment_disable, 361 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 362 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 363 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 364 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 365 366 /* generic read only ipv6 attribute */ 367 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 368 iscsi_iface_net_attr(ipv6_iface, link_local_addr, 369 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 370 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 371 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 372 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 373 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 374 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 375 iscsi_iface_net_attr(ipv6_iface, link_local_state, 376 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 377 iscsi_iface_net_attr(ipv6_iface, router_state, 378 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 379 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 380 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 381 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 382 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 383 iscsi_iface_net_attr(ipv6_iface, traffic_class, 384 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 385 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 386 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 387 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 388 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 389 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 390 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 391 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 392 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 393 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 394 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 395 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 396 397 /* common read only iface attribute */ 398 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 399 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 400 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 401 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 402 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 403 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 404 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 405 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 406 iscsi_iface_net_attr(iface, tcp_nagle_disable, 407 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 408 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 409 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 410 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 411 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 412 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 413 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 414 415 /* common iscsi specific settings attributes */ 416 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 417 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 418 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 419 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 420 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 421 iscsi_iface_attr(iface, data_seq_in_order, 422 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 423 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 424 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 425 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 426 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 427 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 428 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 429 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 430 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 431 iscsi_iface_attr(iface, discovery_auth_optional, 432 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 433 iscsi_iface_attr(iface, discovery_logout, 434 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 435 iscsi_iface_attr(iface, strict_login_comp_en, 436 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 437 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 438 439 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 440 struct attribute *attr, int i) 441 { 442 struct device *dev = container_of(kobj, struct device, kobj); 443 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 444 struct iscsi_transport *t = iface->transport; 445 int param = -1; 446 447 if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 448 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 449 else if (attr == &dev_attr_iface_header_digest.attr) 450 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 451 else if (attr == &dev_attr_iface_data_digest.attr) 452 param = ISCSI_IFACE_PARAM_DATADGST_EN; 453 else if (attr == &dev_attr_iface_immediate_data.attr) 454 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 455 else if (attr == &dev_attr_iface_initial_r2t.attr) 456 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 457 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 458 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 459 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 460 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 461 else if (attr == &dev_attr_iface_erl.attr) 462 param = ISCSI_IFACE_PARAM_ERL; 463 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 464 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 465 else if (attr == &dev_attr_iface_first_burst_len.attr) 466 param = ISCSI_IFACE_PARAM_FIRST_BURST; 467 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 468 param = ISCSI_IFACE_PARAM_MAX_R2T; 469 else if (attr == &dev_attr_iface_max_burst_len.attr) 470 param = ISCSI_IFACE_PARAM_MAX_BURST; 471 else if (attr == &dev_attr_iface_chap_auth.attr) 472 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 473 else if (attr == &dev_attr_iface_bidi_chap.attr) 474 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 475 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 476 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 477 else if (attr == &dev_attr_iface_discovery_logout.attr) 478 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 479 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 480 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 481 else if (attr == &dev_attr_iface_initiator_name.attr) 482 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 483 484 if (param != -1) 485 return t->attr_is_visible(ISCSI_IFACE_PARAM, param); 486 487 if (attr == &dev_attr_iface_enabled.attr) 488 param = ISCSI_NET_PARAM_IFACE_ENABLE; 489 else if (attr == &dev_attr_iface_vlan_id.attr) 490 param = ISCSI_NET_PARAM_VLAN_ID; 491 else if (attr == &dev_attr_iface_vlan_priority.attr) 492 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 493 else if (attr == &dev_attr_iface_vlan_enabled.attr) 494 param = ISCSI_NET_PARAM_VLAN_ENABLED; 495 else if (attr == &dev_attr_iface_mtu.attr) 496 param = ISCSI_NET_PARAM_MTU; 497 else if (attr == &dev_attr_iface_port.attr) 498 param = ISCSI_NET_PARAM_PORT; 499 else if (attr == &dev_attr_iface_ipaddress_state.attr) 500 param = ISCSI_NET_PARAM_IPADDR_STATE; 501 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 502 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 503 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 504 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 505 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 506 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 507 else if (attr == &dev_attr_iface_tcp_wsf.attr) 508 param = ISCSI_NET_PARAM_TCP_WSF; 509 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 510 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 511 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 512 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 513 else if (attr == &dev_attr_iface_cache_id.attr) 514 param = ISCSI_NET_PARAM_CACHE_ID; 515 else if (attr == &dev_attr_iface_redirect_en.attr) 516 param = ISCSI_NET_PARAM_REDIRECT_EN; 517 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 518 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 519 param = ISCSI_NET_PARAM_IPV4_ADDR; 520 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 521 param = ISCSI_NET_PARAM_IPV4_GW; 522 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 523 param = ISCSI_NET_PARAM_IPV4_SUBNET; 524 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 525 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 526 else if (attr == 527 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 528 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 529 else if (attr == 530 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 531 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 532 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 533 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 534 else if (attr == &dev_attr_ipv4_iface_tos.attr) 535 param = ISCSI_NET_PARAM_IPV4_TOS; 536 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 537 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 538 else if (attr == 539 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 540 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 541 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 542 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 543 else if (attr == 544 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 545 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 546 else if (attr == 547 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 548 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 549 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 550 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 551 else if (attr == 552 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 553 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 554 else if (attr == 555 &dev_attr_ipv4_iface_fragment_disable.attr) 556 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 557 else if (attr == 558 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 559 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 560 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 561 param = ISCSI_NET_PARAM_IPV4_TTL; 562 else 563 return 0; 564 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 565 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 566 param = ISCSI_NET_PARAM_IPV6_ADDR; 567 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 568 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 569 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 570 param = ISCSI_NET_PARAM_IPV6_ROUTER; 571 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 572 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 573 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 574 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 575 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 576 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 577 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 578 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 579 else if (attr == 580 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 581 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 582 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 583 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 584 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 585 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 586 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 587 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 588 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 589 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 590 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 591 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 592 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 593 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 594 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 595 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 596 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 597 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 598 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 599 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 600 else 601 return 0; 602 } else { 603 WARN_ONCE(1, "Invalid iface attr"); 604 return 0; 605 } 606 607 return t->attr_is_visible(ISCSI_NET_PARAM, param); 608 } 609 610 static struct attribute *iscsi_iface_attrs[] = { 611 &dev_attr_iface_enabled.attr, 612 &dev_attr_iface_vlan_id.attr, 613 &dev_attr_iface_vlan_priority.attr, 614 &dev_attr_iface_vlan_enabled.attr, 615 &dev_attr_ipv4_iface_ipaddress.attr, 616 &dev_attr_ipv4_iface_gateway.attr, 617 &dev_attr_ipv4_iface_subnet.attr, 618 &dev_attr_ipv4_iface_bootproto.attr, 619 &dev_attr_ipv6_iface_ipaddress.attr, 620 &dev_attr_ipv6_iface_link_local_addr.attr, 621 &dev_attr_ipv6_iface_router_addr.attr, 622 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 623 &dev_attr_ipv6_iface_link_local_autocfg.attr, 624 &dev_attr_iface_mtu.attr, 625 &dev_attr_iface_port.attr, 626 &dev_attr_iface_ipaddress_state.attr, 627 &dev_attr_iface_delayed_ack_en.attr, 628 &dev_attr_iface_tcp_nagle_disable.attr, 629 &dev_attr_iface_tcp_wsf_disable.attr, 630 &dev_attr_iface_tcp_wsf.attr, 631 &dev_attr_iface_tcp_timer_scale.attr, 632 &dev_attr_iface_tcp_timestamp_en.attr, 633 &dev_attr_iface_cache_id.attr, 634 &dev_attr_iface_redirect_en.attr, 635 &dev_attr_iface_def_taskmgmt_tmo.attr, 636 &dev_attr_iface_header_digest.attr, 637 &dev_attr_iface_data_digest.attr, 638 &dev_attr_iface_immediate_data.attr, 639 &dev_attr_iface_initial_r2t.attr, 640 &dev_attr_iface_data_seq_in_order.attr, 641 &dev_attr_iface_data_pdu_in_order.attr, 642 &dev_attr_iface_erl.attr, 643 &dev_attr_iface_max_recv_dlength.attr, 644 &dev_attr_iface_first_burst_len.attr, 645 &dev_attr_iface_max_outstanding_r2t.attr, 646 &dev_attr_iface_max_burst_len.attr, 647 &dev_attr_iface_chap_auth.attr, 648 &dev_attr_iface_bidi_chap.attr, 649 &dev_attr_iface_discovery_auth_optional.attr, 650 &dev_attr_iface_discovery_logout.attr, 651 &dev_attr_iface_strict_login_comp_en.attr, 652 &dev_attr_iface_initiator_name.attr, 653 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 654 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 655 &dev_attr_ipv4_iface_tos_en.attr, 656 &dev_attr_ipv4_iface_tos.attr, 657 &dev_attr_ipv4_iface_grat_arp_en.attr, 658 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 659 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 660 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 661 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 662 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 663 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 664 &dev_attr_ipv4_iface_fragment_disable.attr, 665 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 666 &dev_attr_ipv4_iface_ttl.attr, 667 &dev_attr_ipv6_iface_link_local_state.attr, 668 &dev_attr_ipv6_iface_router_state.attr, 669 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 670 &dev_attr_ipv6_iface_mld_en.attr, 671 &dev_attr_ipv6_iface_flow_label.attr, 672 &dev_attr_ipv6_iface_traffic_class.attr, 673 &dev_attr_ipv6_iface_hop_limit.attr, 674 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 675 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 676 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 677 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 678 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 679 NULL, 680 }; 681 682 static struct attribute_group iscsi_iface_group = { 683 .attrs = iscsi_iface_attrs, 684 .is_visible = iscsi_iface_attr_is_visible, 685 }; 686 687 /* convert iscsi_ipaddress_state values to ascii string name */ 688 static const struct { 689 enum iscsi_ipaddress_state value; 690 char *name; 691 } iscsi_ipaddress_state_names[] = { 692 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 693 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 694 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 695 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 696 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 697 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 698 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 699 }; 700 701 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 702 { 703 int i; 704 char *state = NULL; 705 706 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 707 if (iscsi_ipaddress_state_names[i].value == port_state) { 708 state = iscsi_ipaddress_state_names[i].name; 709 break; 710 } 711 } 712 return state; 713 } 714 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 715 716 /* convert iscsi_router_state values to ascii string name */ 717 static const struct { 718 enum iscsi_router_state value; 719 char *name; 720 } iscsi_router_state_names[] = { 721 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 722 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 723 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 724 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 725 }; 726 727 char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 728 { 729 int i; 730 char *state = NULL; 731 732 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 733 if (iscsi_router_state_names[i].value == router_state) { 734 state = iscsi_router_state_names[i].name; 735 break; 736 } 737 } 738 return state; 739 } 740 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 741 742 struct iscsi_iface * 743 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 744 uint32_t iface_type, uint32_t iface_num, int dd_size) 745 { 746 struct iscsi_iface *iface; 747 int err; 748 749 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 750 if (!iface) 751 return NULL; 752 753 iface->transport = transport; 754 iface->iface_type = iface_type; 755 iface->iface_num = iface_num; 756 iface->dev.release = iscsi_iface_release; 757 iface->dev.class = &iscsi_iface_class; 758 /* parent reference released in iscsi_iface_release */ 759 iface->dev.parent = get_device(&shost->shost_gendev); 760 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 761 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 762 iface_num); 763 else 764 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 765 iface_num); 766 767 err = device_register(&iface->dev); 768 if (err) 769 goto free_iface; 770 771 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 772 if (err) 773 goto unreg_iface; 774 775 if (dd_size) 776 iface->dd_data = &iface[1]; 777 return iface; 778 779 unreg_iface: 780 device_unregister(&iface->dev); 781 return NULL; 782 783 free_iface: 784 put_device(iface->dev.parent); 785 kfree(iface); 786 return NULL; 787 } 788 EXPORT_SYMBOL_GPL(iscsi_create_iface); 789 790 void iscsi_destroy_iface(struct iscsi_iface *iface) 791 { 792 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 793 device_unregister(&iface->dev); 794 } 795 EXPORT_SYMBOL_GPL(iscsi_destroy_iface); 796 797 /* 798 * Interface to display flash node params to sysfs 799 */ 800 801 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ 802 struct device_attribute dev_attr_##_prefix##_##_name = \ 803 __ATTR(_name, _mode, _show, _store) 804 805 /* flash node session attrs show */ 806 #define iscsi_flashnode_sess_attr_show(type, name, param) \ 807 static ssize_t \ 808 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 809 char *buf) \ 810 { \ 811 struct iscsi_bus_flash_session *fnode_sess = \ 812 iscsi_dev_to_flash_session(dev);\ 813 struct iscsi_transport *t = fnode_sess->transport; \ 814 return t->get_flashnode_param(fnode_sess, param, buf); \ 815 } \ 816 817 818 #define iscsi_flashnode_sess_attr(type, name, param) \ 819 iscsi_flashnode_sess_attr_show(type, name, param) \ 820 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 821 show_##type##_##name, NULL); 822 823 /* Flash node session attributes */ 824 825 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 826 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 827 iscsi_flashnode_sess_attr(fnode, discovery_session, 828 ISCSI_FLASHNODE_DISCOVERY_SESS); 829 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 830 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 831 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 832 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 833 iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 834 ISCSI_FLASHNODE_DATASEQ_INORDER); 835 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 836 ISCSI_FLASHNODE_PDU_INORDER); 837 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 838 iscsi_flashnode_sess_attr(fnode, discovery_logout, 839 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 840 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 841 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 842 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 843 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 844 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 845 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 846 iscsi_flashnode_sess_attr(fnode, def_time2retain, 847 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 848 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 849 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 850 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 851 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 852 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 853 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 854 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 855 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 856 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 857 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 858 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 859 iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 860 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 861 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 862 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 863 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 864 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 865 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 866 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 867 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 868 869 static struct attribute *iscsi_flashnode_sess_attrs[] = { 870 &dev_attr_fnode_auto_snd_tgt_disable.attr, 871 &dev_attr_fnode_discovery_session.attr, 872 &dev_attr_fnode_portal_type.attr, 873 &dev_attr_fnode_entry_enable.attr, 874 &dev_attr_fnode_immediate_data.attr, 875 &dev_attr_fnode_initial_r2t.attr, 876 &dev_attr_fnode_data_seq_in_order.attr, 877 &dev_attr_fnode_data_pdu_in_order.attr, 878 &dev_attr_fnode_chap_auth.attr, 879 &dev_attr_fnode_discovery_logout.attr, 880 &dev_attr_fnode_bidi_chap.attr, 881 &dev_attr_fnode_discovery_auth_optional.attr, 882 &dev_attr_fnode_erl.attr, 883 &dev_attr_fnode_first_burst_len.attr, 884 &dev_attr_fnode_def_time2wait.attr, 885 &dev_attr_fnode_def_time2retain.attr, 886 &dev_attr_fnode_max_outstanding_r2t.attr, 887 &dev_attr_fnode_isid.attr, 888 &dev_attr_fnode_tsid.attr, 889 &dev_attr_fnode_max_burst_len.attr, 890 &dev_attr_fnode_def_taskmgmt_tmo.attr, 891 &dev_attr_fnode_targetalias.attr, 892 &dev_attr_fnode_targetname.attr, 893 &dev_attr_fnode_tpgt.attr, 894 &dev_attr_fnode_discovery_parent_idx.attr, 895 &dev_attr_fnode_discovery_parent_type.attr, 896 &dev_attr_fnode_chap_in_idx.attr, 897 &dev_attr_fnode_chap_out_idx.attr, 898 &dev_attr_fnode_username.attr, 899 &dev_attr_fnode_username_in.attr, 900 &dev_attr_fnode_password.attr, 901 &dev_attr_fnode_password_in.attr, 902 &dev_attr_fnode_is_boot_target.attr, 903 NULL, 904 }; 905 906 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, 907 struct attribute *attr, 908 int i) 909 { 910 struct device *dev = container_of(kobj, struct device, kobj); 911 struct iscsi_bus_flash_session *fnode_sess = 912 iscsi_dev_to_flash_session(dev); 913 struct iscsi_transport *t = fnode_sess->transport; 914 int param; 915 916 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { 917 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; 918 } else if (attr == &dev_attr_fnode_discovery_session.attr) { 919 param = ISCSI_FLASHNODE_DISCOVERY_SESS; 920 } else if (attr == &dev_attr_fnode_portal_type.attr) { 921 param = ISCSI_FLASHNODE_PORTAL_TYPE; 922 } else if (attr == &dev_attr_fnode_entry_enable.attr) { 923 param = ISCSI_FLASHNODE_ENTRY_EN; 924 } else if (attr == &dev_attr_fnode_immediate_data.attr) { 925 param = ISCSI_FLASHNODE_IMM_DATA_EN; 926 } else if (attr == &dev_attr_fnode_initial_r2t.attr) { 927 param = ISCSI_FLASHNODE_INITIAL_R2T_EN; 928 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { 929 param = ISCSI_FLASHNODE_DATASEQ_INORDER; 930 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { 931 param = ISCSI_FLASHNODE_PDU_INORDER; 932 } else if (attr == &dev_attr_fnode_chap_auth.attr) { 933 param = ISCSI_FLASHNODE_CHAP_AUTH_EN; 934 } else if (attr == &dev_attr_fnode_discovery_logout.attr) { 935 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; 936 } else if (attr == &dev_attr_fnode_bidi_chap.attr) { 937 param = ISCSI_FLASHNODE_BIDI_CHAP_EN; 938 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { 939 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; 940 } else if (attr == &dev_attr_fnode_erl.attr) { 941 param = ISCSI_FLASHNODE_ERL; 942 } else if (attr == &dev_attr_fnode_first_burst_len.attr) { 943 param = ISCSI_FLASHNODE_FIRST_BURST; 944 } else if (attr == &dev_attr_fnode_def_time2wait.attr) { 945 param = ISCSI_FLASHNODE_DEF_TIME2WAIT; 946 } else if (attr == &dev_attr_fnode_def_time2retain.attr) { 947 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; 948 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { 949 param = ISCSI_FLASHNODE_MAX_R2T; 950 } else if (attr == &dev_attr_fnode_isid.attr) { 951 param = ISCSI_FLASHNODE_ISID; 952 } else if (attr == &dev_attr_fnode_tsid.attr) { 953 param = ISCSI_FLASHNODE_TSID; 954 } else if (attr == &dev_attr_fnode_max_burst_len.attr) { 955 param = ISCSI_FLASHNODE_MAX_BURST; 956 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { 957 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; 958 } else if (attr == &dev_attr_fnode_targetalias.attr) { 959 param = ISCSI_FLASHNODE_ALIAS; 960 } else if (attr == &dev_attr_fnode_targetname.attr) { 961 param = ISCSI_FLASHNODE_NAME; 962 } else if (attr == &dev_attr_fnode_tpgt.attr) { 963 param = ISCSI_FLASHNODE_TPGT; 964 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { 965 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; 966 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { 967 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; 968 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { 969 param = ISCSI_FLASHNODE_CHAP_IN_IDX; 970 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { 971 param = ISCSI_FLASHNODE_CHAP_OUT_IDX; 972 } else if (attr == &dev_attr_fnode_username.attr) { 973 param = ISCSI_FLASHNODE_USERNAME; 974 } else if (attr == &dev_attr_fnode_username_in.attr) { 975 param = ISCSI_FLASHNODE_USERNAME_IN; 976 } else if (attr == &dev_attr_fnode_password.attr) { 977 param = ISCSI_FLASHNODE_PASSWORD; 978 } else if (attr == &dev_attr_fnode_password_in.attr) { 979 param = ISCSI_FLASHNODE_PASSWORD_IN; 980 } else if (attr == &dev_attr_fnode_is_boot_target.attr) { 981 param = ISCSI_FLASHNODE_IS_BOOT_TGT; 982 } else { 983 WARN_ONCE(1, "Invalid flashnode session attr"); 984 return 0; 985 } 986 987 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 988 } 989 990 static struct attribute_group iscsi_flashnode_sess_attr_group = { 991 .attrs = iscsi_flashnode_sess_attrs, 992 .is_visible = iscsi_flashnode_sess_attr_is_visible, 993 }; 994 995 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 996 &iscsi_flashnode_sess_attr_group, 997 NULL, 998 }; 999 1000 static void iscsi_flashnode_sess_release(struct device *dev) 1001 { 1002 struct iscsi_bus_flash_session *fnode_sess = 1003 iscsi_dev_to_flash_session(dev); 1004 1005 kfree(fnode_sess->targetname); 1006 kfree(fnode_sess->targetalias); 1007 kfree(fnode_sess->portal_type); 1008 kfree(fnode_sess); 1009 } 1010 1011 static const struct device_type iscsi_flashnode_sess_dev_type = { 1012 .name = "iscsi_flashnode_sess_dev_type", 1013 .groups = iscsi_flashnode_sess_attr_groups, 1014 .release = iscsi_flashnode_sess_release, 1015 }; 1016 1017 /* flash node connection attrs show */ 1018 #define iscsi_flashnode_conn_attr_show(type, name, param) \ 1019 static ssize_t \ 1020 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 1021 char *buf) \ 1022 { \ 1023 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ 1024 struct iscsi_bus_flash_session *fnode_sess = \ 1025 iscsi_flash_conn_to_flash_session(fnode_conn);\ 1026 struct iscsi_transport *t = fnode_conn->transport; \ 1027 return t->get_flashnode_param(fnode_sess, param, buf); \ 1028 } \ 1029 1030 1031 #define iscsi_flashnode_conn_attr(type, name, param) \ 1032 iscsi_flashnode_conn_attr_show(type, name, param) \ 1033 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1034 show_##type##_##name, NULL); 1035 1036 /* Flash node connection attributes */ 1037 1038 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1039 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1040 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1041 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1042 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1043 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1044 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1045 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1046 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1047 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1048 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1049 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1050 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1051 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1052 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1053 iscsi_flashnode_conn_attr(fnode, fragment_disable, 1054 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1055 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1056 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1057 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1058 iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1059 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1060 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1061 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1062 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1063 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1064 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1065 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1066 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1067 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1068 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1069 iscsi_flashnode_conn_attr(fnode, max_segment_size, 1070 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1071 iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1072 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1073 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1074 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1075 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1076 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1077 1078 static struct attribute *iscsi_flashnode_conn_attrs[] = { 1079 &dev_attr_fnode_is_fw_assigned_ipv6.attr, 1080 &dev_attr_fnode_header_digest.attr, 1081 &dev_attr_fnode_data_digest.attr, 1082 &dev_attr_fnode_snack_req.attr, 1083 &dev_attr_fnode_tcp_timestamp_stat.attr, 1084 &dev_attr_fnode_tcp_nagle_disable.attr, 1085 &dev_attr_fnode_tcp_wsf_disable.attr, 1086 &dev_attr_fnode_tcp_timer_scale.attr, 1087 &dev_attr_fnode_tcp_timestamp_enable.attr, 1088 &dev_attr_fnode_fragment_disable.attr, 1089 &dev_attr_fnode_max_recv_dlength.attr, 1090 &dev_attr_fnode_max_xmit_dlength.attr, 1091 &dev_attr_fnode_keepalive_tmo.attr, 1092 &dev_attr_fnode_port.attr, 1093 &dev_attr_fnode_ipaddress.attr, 1094 &dev_attr_fnode_redirect_ipaddr.attr, 1095 &dev_attr_fnode_max_segment_size.attr, 1096 &dev_attr_fnode_local_port.attr, 1097 &dev_attr_fnode_ipv4_tos.attr, 1098 &dev_attr_fnode_ipv6_traffic_class.attr, 1099 &dev_attr_fnode_ipv6_flow_label.attr, 1100 &dev_attr_fnode_link_local_ipv6.attr, 1101 &dev_attr_fnode_tcp_xmit_wsf.attr, 1102 &dev_attr_fnode_tcp_recv_wsf.attr, 1103 &dev_attr_fnode_statsn.attr, 1104 &dev_attr_fnode_exp_statsn.attr, 1105 NULL, 1106 }; 1107 1108 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, 1109 struct attribute *attr, 1110 int i) 1111 { 1112 struct device *dev = container_of(kobj, struct device, kobj); 1113 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1114 struct iscsi_transport *t = fnode_conn->transport; 1115 int param; 1116 1117 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { 1118 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; 1119 } else if (attr == &dev_attr_fnode_header_digest.attr) { 1120 param = ISCSI_FLASHNODE_HDR_DGST_EN; 1121 } else if (attr == &dev_attr_fnode_data_digest.attr) { 1122 param = ISCSI_FLASHNODE_DATA_DGST_EN; 1123 } else if (attr == &dev_attr_fnode_snack_req.attr) { 1124 param = ISCSI_FLASHNODE_SNACK_REQ_EN; 1125 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { 1126 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; 1127 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { 1128 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; 1129 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { 1130 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; 1131 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { 1132 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; 1133 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { 1134 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; 1135 } else if (attr == &dev_attr_fnode_fragment_disable.attr) { 1136 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; 1137 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { 1138 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; 1139 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { 1140 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; 1141 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { 1142 param = ISCSI_FLASHNODE_KEEPALIVE_TMO; 1143 } else if (attr == &dev_attr_fnode_port.attr) { 1144 param = ISCSI_FLASHNODE_PORT; 1145 } else if (attr == &dev_attr_fnode_ipaddress.attr) { 1146 param = ISCSI_FLASHNODE_IPADDR; 1147 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { 1148 param = ISCSI_FLASHNODE_REDIRECT_IPADDR; 1149 } else if (attr == &dev_attr_fnode_max_segment_size.attr) { 1150 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; 1151 } else if (attr == &dev_attr_fnode_local_port.attr) { 1152 param = ISCSI_FLASHNODE_LOCAL_PORT; 1153 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { 1154 param = ISCSI_FLASHNODE_IPV4_TOS; 1155 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { 1156 param = ISCSI_FLASHNODE_IPV6_TC; 1157 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { 1158 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; 1159 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { 1160 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; 1161 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { 1162 param = ISCSI_FLASHNODE_TCP_XMIT_WSF; 1163 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { 1164 param = ISCSI_FLASHNODE_TCP_RECV_WSF; 1165 } else if (attr == &dev_attr_fnode_statsn.attr) { 1166 param = ISCSI_FLASHNODE_STATSN; 1167 } else if (attr == &dev_attr_fnode_exp_statsn.attr) { 1168 param = ISCSI_FLASHNODE_EXP_STATSN; 1169 } else { 1170 WARN_ONCE(1, "Invalid flashnode connection attr"); 1171 return 0; 1172 } 1173 1174 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1175 } 1176 1177 static struct attribute_group iscsi_flashnode_conn_attr_group = { 1178 .attrs = iscsi_flashnode_conn_attrs, 1179 .is_visible = iscsi_flashnode_conn_attr_is_visible, 1180 }; 1181 1182 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1183 &iscsi_flashnode_conn_attr_group, 1184 NULL, 1185 }; 1186 1187 static void iscsi_flashnode_conn_release(struct device *dev) 1188 { 1189 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1190 1191 kfree(fnode_conn->ipaddress); 1192 kfree(fnode_conn->redirect_ipaddr); 1193 kfree(fnode_conn->link_local_ipv6_addr); 1194 kfree(fnode_conn); 1195 } 1196 1197 static const struct device_type iscsi_flashnode_conn_dev_type = { 1198 .name = "iscsi_flashnode_conn_dev_type", 1199 .groups = iscsi_flashnode_conn_attr_groups, 1200 .release = iscsi_flashnode_conn_release, 1201 }; 1202 1203 static struct bus_type iscsi_flashnode_bus; 1204 1205 int iscsi_flashnode_bus_match(struct device *dev, 1206 struct device_driver *drv) 1207 { 1208 if (dev->bus == &iscsi_flashnode_bus) 1209 return 1; 1210 return 0; 1211 } 1212 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1213 1214 static struct bus_type iscsi_flashnode_bus = { 1215 .name = "iscsi_flashnode", 1216 .match = &iscsi_flashnode_bus_match, 1217 }; 1218 1219 /** 1220 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs 1221 * @shost: pointer to host data 1222 * @index: index of flashnode to add in sysfs 1223 * @transport: pointer to transport data 1224 * @dd_size: total size to allocate 1225 * 1226 * Adds a sysfs entry for the flashnode session attributes 1227 * 1228 * Returns: 1229 * pointer to allocated flashnode sess on success 1230 * %NULL on failure 1231 */ 1232 struct iscsi_bus_flash_session * 1233 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, 1234 struct iscsi_transport *transport, 1235 int dd_size) 1236 { 1237 struct iscsi_bus_flash_session *fnode_sess; 1238 int err; 1239 1240 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); 1241 if (!fnode_sess) 1242 return NULL; 1243 1244 fnode_sess->transport = transport; 1245 fnode_sess->target_id = index; 1246 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; 1247 fnode_sess->dev.bus = &iscsi_flashnode_bus; 1248 fnode_sess->dev.parent = &shost->shost_gendev; 1249 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", 1250 shost->host_no, index); 1251 1252 err = device_register(&fnode_sess->dev); 1253 if (err) 1254 goto free_fnode_sess; 1255 1256 if (dd_size) 1257 fnode_sess->dd_data = &fnode_sess[1]; 1258 1259 return fnode_sess; 1260 1261 free_fnode_sess: 1262 kfree(fnode_sess); 1263 return NULL; 1264 } 1265 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); 1266 1267 /** 1268 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs 1269 * @shost: pointer to host data 1270 * @fnode_sess: pointer to the parent flashnode session entry 1271 * @transport: pointer to transport data 1272 * @dd_size: total size to allocate 1273 * 1274 * Adds a sysfs entry for the flashnode connection attributes 1275 * 1276 * Returns: 1277 * pointer to allocated flashnode conn on success 1278 * %NULL on failure 1279 */ 1280 struct iscsi_bus_flash_conn * 1281 iscsi_create_flashnode_conn(struct Scsi_Host *shost, 1282 struct iscsi_bus_flash_session *fnode_sess, 1283 struct iscsi_transport *transport, 1284 int dd_size) 1285 { 1286 struct iscsi_bus_flash_conn *fnode_conn; 1287 int err; 1288 1289 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); 1290 if (!fnode_conn) 1291 return NULL; 1292 1293 fnode_conn->transport = transport; 1294 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; 1295 fnode_conn->dev.bus = &iscsi_flashnode_bus; 1296 fnode_conn->dev.parent = &fnode_sess->dev; 1297 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", 1298 shost->host_no, fnode_sess->target_id); 1299 1300 err = device_register(&fnode_conn->dev); 1301 if (err) 1302 goto free_fnode_conn; 1303 1304 if (dd_size) 1305 fnode_conn->dd_data = &fnode_conn[1]; 1306 1307 return fnode_conn; 1308 1309 free_fnode_conn: 1310 kfree(fnode_conn); 1311 return NULL; 1312 } 1313 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); 1314 1315 /** 1316 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn 1317 * @dev: device to verify 1318 * @data: pointer to data containing value to use for verification 1319 * 1320 * Verifies if the passed device is flashnode conn device 1321 * 1322 * Returns: 1323 * 1 on success 1324 * 0 on failure 1325 */ 1326 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1327 { 1328 return dev->bus == &iscsi_flashnode_bus; 1329 } 1330 1331 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1332 { 1333 device_unregister(&fnode_conn->dev); 1334 return 0; 1335 } 1336 1337 static int flashnode_match_index(struct device *dev, void *data) 1338 { 1339 struct iscsi_bus_flash_session *fnode_sess = NULL; 1340 int ret = 0; 1341 1342 if (!iscsi_flashnode_bus_match(dev, NULL)) 1343 goto exit_match_index; 1344 1345 fnode_sess = iscsi_dev_to_flash_session(dev); 1346 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1347 1348 exit_match_index: 1349 return ret; 1350 } 1351 1352 /** 1353 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1354 * @shost: pointer to host data 1355 * @idx: index to match 1356 * 1357 * Finds the flashnode session object for the passed index 1358 * 1359 * Returns: 1360 * pointer to found flashnode session object on success 1361 * %NULL on failure 1362 */ 1363 static struct iscsi_bus_flash_session * 1364 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1365 { 1366 struct iscsi_bus_flash_session *fnode_sess = NULL; 1367 struct device *dev; 1368 1369 dev = device_find_child(&shost->shost_gendev, &idx, 1370 flashnode_match_index); 1371 if (dev) 1372 fnode_sess = iscsi_dev_to_flash_session(dev); 1373 1374 return fnode_sess; 1375 } 1376 1377 /** 1378 * iscsi_find_flashnode_sess - finds flashnode session entry 1379 * @shost: pointer to host data 1380 * @data: pointer to data containing value to use for comparison 1381 * @fn: function pointer that does actual comparison 1382 * 1383 * Finds the flashnode session object comparing the data passed using logic 1384 * defined in passed function pointer 1385 * 1386 * Returns: 1387 * pointer to found flashnode session device object on success 1388 * %NULL on failure 1389 */ 1390 struct device * 1391 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1392 int (*fn)(struct device *dev, void *data)) 1393 { 1394 return device_find_child(&shost->shost_gendev, data, fn); 1395 } 1396 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1397 1398 /** 1399 * iscsi_find_flashnode_conn - finds flashnode connection entry 1400 * @fnode_sess: pointer to parent flashnode session entry 1401 * 1402 * Finds the flashnode connection object comparing the data passed using logic 1403 * defined in passed function pointer 1404 * 1405 * Returns: 1406 * pointer to found flashnode connection device object on success 1407 * %NULL on failure 1408 */ 1409 struct device * 1410 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1411 { 1412 return device_find_child(&fnode_sess->dev, NULL, 1413 iscsi_is_flashnode_conn_dev); 1414 } 1415 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1416 1417 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1418 { 1419 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1420 return 0; 1421 1422 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1423 } 1424 1425 /** 1426 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1427 * @fnode_sess: pointer to flashnode session entry to be destroyed 1428 * 1429 * Deletes the flashnode session entry and all children flashnode connection 1430 * entries from sysfs 1431 */ 1432 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1433 { 1434 int err; 1435 1436 err = device_for_each_child(&fnode_sess->dev, NULL, 1437 iscsi_iter_destroy_flashnode_conn_fn); 1438 if (err) 1439 pr_err("Could not delete all connections for %s. Error %d.\n", 1440 fnode_sess->dev.kobj.name, err); 1441 1442 device_unregister(&fnode_sess->dev); 1443 } 1444 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1445 1446 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1447 { 1448 if (!iscsi_flashnode_bus_match(dev, NULL)) 1449 return 0; 1450 1451 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1452 return 0; 1453 } 1454 1455 /** 1456 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1457 * @shost: pointer to host data 1458 * 1459 * Destroys all the flashnode session entries and all corresponding children 1460 * flashnode connection entries from sysfs 1461 */ 1462 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1463 { 1464 device_for_each_child(&shost->shost_gendev, NULL, 1465 iscsi_iter_destroy_flashnode_fn); 1466 } 1467 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1468 1469 /* 1470 * BSG support 1471 */ 1472 /** 1473 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1474 * @job: bsg job to be processed 1475 */ 1476 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1477 { 1478 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1479 struct iscsi_bsg_request *req = job->request; 1480 struct iscsi_bsg_reply *reply = job->reply; 1481 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1482 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1483 int ret; 1484 1485 /* check if we have the msgcode value at least */ 1486 if (job->request_len < sizeof(uint32_t)) { 1487 ret = -ENOMSG; 1488 goto fail_host_msg; 1489 } 1490 1491 /* Validate the host command */ 1492 switch (req->msgcode) { 1493 case ISCSI_BSG_HST_VENDOR: 1494 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1495 if ((shost->hostt->vendor_id == 0L) || 1496 (req->rqst_data.h_vendor.vendor_id != 1497 shost->hostt->vendor_id)) { 1498 ret = -ESRCH; 1499 goto fail_host_msg; 1500 } 1501 break; 1502 default: 1503 ret = -EBADR; 1504 goto fail_host_msg; 1505 } 1506 1507 /* check if we really have all the request data needed */ 1508 if (job->request_len < cmdlen) { 1509 ret = -ENOMSG; 1510 goto fail_host_msg; 1511 } 1512 1513 ret = i->iscsi_transport->bsg_request(job); 1514 if (!ret) 1515 return 0; 1516 1517 fail_host_msg: 1518 /* return the errno failure code as the only status */ 1519 BUG_ON(job->reply_len < sizeof(uint32_t)); 1520 reply->reply_payload_rcv_len = 0; 1521 reply->result = ret; 1522 job->reply_len = sizeof(uint32_t); 1523 bsg_job_done(job, ret, 0); 1524 return 0; 1525 } 1526 1527 /** 1528 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1529 * @shost: shost for iscsi_host 1530 * @ihost: iscsi_cls_host adding the structures to 1531 */ 1532 static int 1533 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1534 { 1535 struct device *dev = &shost->shost_gendev; 1536 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1537 struct request_queue *q; 1538 char bsg_name[20]; 1539 1540 if (!i->iscsi_transport->bsg_request) 1541 return -ENOTSUPP; 1542 1543 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1544 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1545 if (IS_ERR(q)) { 1546 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1547 "initialize - no request queue\n"); 1548 return PTR_ERR(q); 1549 } 1550 __scsi_init_queue(shost, q); 1551 1552 ihost->bsg_q = q; 1553 return 0; 1554 } 1555 1556 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1557 struct device *cdev) 1558 { 1559 struct Scsi_Host *shost = dev_to_shost(dev); 1560 struct iscsi_cls_host *ihost = shost->shost_data; 1561 1562 memset(ihost, 0, sizeof(*ihost)); 1563 mutex_init(&ihost->mutex); 1564 1565 iscsi_bsg_host_add(shost, ihost); 1566 /* ignore any bsg add error - we just can't do sgio */ 1567 1568 return 0; 1569 } 1570 1571 static int iscsi_remove_host(struct transport_container *tc, 1572 struct device *dev, struct device *cdev) 1573 { 1574 struct Scsi_Host *shost = dev_to_shost(dev); 1575 struct iscsi_cls_host *ihost = shost->shost_data; 1576 1577 bsg_remove_queue(ihost->bsg_q); 1578 return 0; 1579 } 1580 1581 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1582 "iscsi_host", 1583 iscsi_setup_host, 1584 iscsi_remove_host, 1585 NULL); 1586 1587 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1588 "iscsi_session", 1589 NULL, 1590 NULL, 1591 NULL); 1592 1593 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1594 "iscsi_connection", 1595 NULL, 1596 NULL, 1597 NULL); 1598 1599 static struct sock *nls; 1600 static DEFINE_MUTEX(rx_queue_mutex); 1601 1602 static LIST_HEAD(sesslist); 1603 static DEFINE_SPINLOCK(sesslock); 1604 static LIST_HEAD(connlist); 1605 static LIST_HEAD(connlist_err); 1606 static DEFINE_SPINLOCK(connlock); 1607 1608 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1609 { 1610 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1611 return sess->sid; 1612 } 1613 1614 /* 1615 * Returns the matching session to a given sid 1616 */ 1617 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1618 { 1619 unsigned long flags; 1620 struct iscsi_cls_session *sess; 1621 1622 spin_lock_irqsave(&sesslock, flags); 1623 list_for_each_entry(sess, &sesslist, sess_list) { 1624 if (sess->sid == sid) { 1625 spin_unlock_irqrestore(&sesslock, flags); 1626 return sess; 1627 } 1628 } 1629 spin_unlock_irqrestore(&sesslock, flags); 1630 return NULL; 1631 } 1632 1633 /* 1634 * Returns the matching connection to a given sid / cid tuple 1635 */ 1636 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1637 { 1638 unsigned long flags; 1639 struct iscsi_cls_conn *conn; 1640 1641 spin_lock_irqsave(&connlock, flags); 1642 list_for_each_entry(conn, &connlist, conn_list) { 1643 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1644 spin_unlock_irqrestore(&connlock, flags); 1645 return conn; 1646 } 1647 } 1648 spin_unlock_irqrestore(&connlock, flags); 1649 return NULL; 1650 } 1651 1652 /* 1653 * The following functions can be used by LLDs that allocate 1654 * their own scsi_hosts or by software iscsi LLDs 1655 */ 1656 static struct { 1657 int value; 1658 char *name; 1659 } iscsi_session_state_names[] = { 1660 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1661 { ISCSI_SESSION_FAILED, "FAILED" }, 1662 { ISCSI_SESSION_FREE, "FREE" }, 1663 }; 1664 1665 static const char *iscsi_session_state_name(int state) 1666 { 1667 int i; 1668 char *name = NULL; 1669 1670 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1671 if (iscsi_session_state_names[i].value == state) { 1672 name = iscsi_session_state_names[i].name; 1673 break; 1674 } 1675 } 1676 return name; 1677 } 1678 1679 int iscsi_session_chkready(struct iscsi_cls_session *session) 1680 { 1681 int err; 1682 1683 switch (session->state) { 1684 case ISCSI_SESSION_LOGGED_IN: 1685 err = 0; 1686 break; 1687 case ISCSI_SESSION_FAILED: 1688 err = DID_IMM_RETRY << 16; 1689 break; 1690 case ISCSI_SESSION_FREE: 1691 err = DID_TRANSPORT_FAILFAST << 16; 1692 break; 1693 default: 1694 err = DID_NO_CONNECT << 16; 1695 break; 1696 } 1697 return err; 1698 } 1699 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1700 1701 int iscsi_is_session_online(struct iscsi_cls_session *session) 1702 { 1703 unsigned long flags; 1704 int ret = 0; 1705 1706 spin_lock_irqsave(&session->lock, flags); 1707 if (session->state == ISCSI_SESSION_LOGGED_IN) 1708 ret = 1; 1709 spin_unlock_irqrestore(&session->lock, flags); 1710 return ret; 1711 } 1712 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1713 1714 static void iscsi_session_release(struct device *dev) 1715 { 1716 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1717 struct Scsi_Host *shost; 1718 1719 shost = iscsi_session_to_shost(session); 1720 scsi_host_put(shost); 1721 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1722 kfree(session); 1723 } 1724 1725 int iscsi_is_session_dev(const struct device *dev) 1726 { 1727 return dev->release == iscsi_session_release; 1728 } 1729 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1730 1731 static int iscsi_iter_session_fn(struct device *dev, void *data) 1732 { 1733 void (* fn) (struct iscsi_cls_session *) = data; 1734 1735 if (!iscsi_is_session_dev(dev)) 1736 return 0; 1737 fn(iscsi_dev_to_session(dev)); 1738 return 0; 1739 } 1740 1741 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1742 void (*fn)(struct iscsi_cls_session *)) 1743 { 1744 device_for_each_child(&shost->shost_gendev, fn, 1745 iscsi_iter_session_fn); 1746 } 1747 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1748 1749 struct iscsi_scan_data { 1750 unsigned int channel; 1751 unsigned int id; 1752 u64 lun; 1753 enum scsi_scan_mode rescan; 1754 }; 1755 1756 static int iscsi_user_scan_session(struct device *dev, void *data) 1757 { 1758 struct iscsi_scan_data *scan_data = data; 1759 struct iscsi_cls_session *session; 1760 struct Scsi_Host *shost; 1761 struct iscsi_cls_host *ihost; 1762 unsigned long flags; 1763 unsigned int id; 1764 1765 if (!iscsi_is_session_dev(dev)) 1766 return 0; 1767 1768 session = iscsi_dev_to_session(dev); 1769 1770 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1771 1772 shost = iscsi_session_to_shost(session); 1773 ihost = shost->shost_data; 1774 1775 mutex_lock(&ihost->mutex); 1776 spin_lock_irqsave(&session->lock, flags); 1777 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1778 spin_unlock_irqrestore(&session->lock, flags); 1779 goto user_scan_exit; 1780 } 1781 id = session->target_id; 1782 spin_unlock_irqrestore(&session->lock, flags); 1783 1784 if (id != ISCSI_MAX_TARGET) { 1785 if ((scan_data->channel == SCAN_WILD_CARD || 1786 scan_data->channel == 0) && 1787 (scan_data->id == SCAN_WILD_CARD || 1788 scan_data->id == id)) 1789 scsi_scan_target(&session->dev, 0, id, 1790 scan_data->lun, scan_data->rescan); 1791 } 1792 1793 user_scan_exit: 1794 mutex_unlock(&ihost->mutex); 1795 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1796 return 0; 1797 } 1798 1799 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1800 uint id, u64 lun) 1801 { 1802 struct iscsi_scan_data scan_data; 1803 1804 scan_data.channel = channel; 1805 scan_data.id = id; 1806 scan_data.lun = lun; 1807 scan_data.rescan = SCSI_SCAN_MANUAL; 1808 1809 return device_for_each_child(&shost->shost_gendev, &scan_data, 1810 iscsi_user_scan_session); 1811 } 1812 1813 static void iscsi_scan_session(struct work_struct *work) 1814 { 1815 struct iscsi_cls_session *session = 1816 container_of(work, struct iscsi_cls_session, scan_work); 1817 struct iscsi_scan_data scan_data; 1818 1819 scan_data.channel = 0; 1820 scan_data.id = SCAN_WILD_CARD; 1821 scan_data.lun = SCAN_WILD_CARD; 1822 scan_data.rescan = SCSI_SCAN_RESCAN; 1823 1824 iscsi_user_scan_session(&session->dev, &scan_data); 1825 } 1826 1827 /** 1828 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1829 * @cmd: scsi cmd passed to scsi eh handler 1830 * 1831 * If the session is down this function will wait for the recovery 1832 * timer to fire or for the session to be logged back in. If the 1833 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1834 * should pass this error value to the scsi eh. 1835 */ 1836 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1837 { 1838 struct iscsi_cls_session *session = 1839 starget_to_session(scsi_target(cmd->device)); 1840 unsigned long flags; 1841 int ret = 0; 1842 1843 spin_lock_irqsave(&session->lock, flags); 1844 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1845 if (session->state == ISCSI_SESSION_FREE) { 1846 ret = FAST_IO_FAIL; 1847 break; 1848 } 1849 spin_unlock_irqrestore(&session->lock, flags); 1850 msleep(1000); 1851 spin_lock_irqsave(&session->lock, flags); 1852 } 1853 spin_unlock_irqrestore(&session->lock, flags); 1854 return ret; 1855 } 1856 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1857 1858 static void session_recovery_timedout(struct work_struct *work) 1859 { 1860 struct iscsi_cls_session *session = 1861 container_of(work, struct iscsi_cls_session, 1862 recovery_work.work); 1863 unsigned long flags; 1864 1865 iscsi_cls_session_printk(KERN_INFO, session, 1866 "session recovery timed out after %d secs\n", 1867 session->recovery_tmo); 1868 1869 spin_lock_irqsave(&session->lock, flags); 1870 switch (session->state) { 1871 case ISCSI_SESSION_FAILED: 1872 session->state = ISCSI_SESSION_FREE; 1873 break; 1874 case ISCSI_SESSION_LOGGED_IN: 1875 case ISCSI_SESSION_FREE: 1876 /* we raced with the unblock's flush */ 1877 spin_unlock_irqrestore(&session->lock, flags); 1878 return; 1879 } 1880 spin_unlock_irqrestore(&session->lock, flags); 1881 1882 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1883 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1884 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1885 1886 if (session->transport->session_recovery_timedout) 1887 session->transport->session_recovery_timedout(session); 1888 } 1889 1890 static void __iscsi_unblock_session(struct work_struct *work) 1891 { 1892 struct iscsi_cls_session *session = 1893 container_of(work, struct iscsi_cls_session, 1894 unblock_work); 1895 unsigned long flags; 1896 1897 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1898 1899 cancel_delayed_work_sync(&session->recovery_work); 1900 spin_lock_irqsave(&session->lock, flags); 1901 session->state = ISCSI_SESSION_LOGGED_IN; 1902 spin_unlock_irqrestore(&session->lock, flags); 1903 /* start IO */ 1904 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1905 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1906 } 1907 1908 /** 1909 * iscsi_unblock_session - set a session as logged in and start IO. 1910 * @session: iscsi session 1911 * 1912 * Mark a session as ready to accept IO. 1913 */ 1914 void iscsi_unblock_session(struct iscsi_cls_session *session) 1915 { 1916 if (!cancel_work_sync(&session->block_work)) 1917 cancel_delayed_work_sync(&session->recovery_work); 1918 1919 queue_work(session->workq, &session->unblock_work); 1920 /* 1921 * Blocking the session can be done from any context so we only 1922 * queue the block work. Make sure the unblock work has completed 1923 * because it flushes/cancels the other works and updates the state. 1924 */ 1925 flush_work(&session->unblock_work); 1926 } 1927 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1928 1929 static void __iscsi_block_session(struct work_struct *work) 1930 { 1931 struct iscsi_cls_session *session = 1932 container_of(work, struct iscsi_cls_session, 1933 block_work); 1934 unsigned long flags; 1935 1936 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1937 spin_lock_irqsave(&session->lock, flags); 1938 session->state = ISCSI_SESSION_FAILED; 1939 spin_unlock_irqrestore(&session->lock, flags); 1940 scsi_target_block(&session->dev); 1941 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1942 if (session->recovery_tmo >= 0) 1943 queue_delayed_work(session->workq, 1944 &session->recovery_work, 1945 session->recovery_tmo * HZ); 1946 } 1947 1948 void iscsi_block_session(struct iscsi_cls_session *session) 1949 { 1950 queue_work(session->workq, &session->block_work); 1951 } 1952 EXPORT_SYMBOL_GPL(iscsi_block_session); 1953 1954 static void __iscsi_unbind_session(struct work_struct *work) 1955 { 1956 struct iscsi_cls_session *session = 1957 container_of(work, struct iscsi_cls_session, 1958 unbind_work); 1959 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1960 struct iscsi_cls_host *ihost = shost->shost_data; 1961 unsigned long flags; 1962 unsigned int target_id; 1963 1964 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 1965 1966 /* Prevent new scans and make sure scanning is not in progress */ 1967 mutex_lock(&ihost->mutex); 1968 spin_lock_irqsave(&session->lock, flags); 1969 if (session->target_id == ISCSI_MAX_TARGET) { 1970 spin_unlock_irqrestore(&session->lock, flags); 1971 mutex_unlock(&ihost->mutex); 1972 goto unbind_session_exit; 1973 } 1974 1975 target_id = session->target_id; 1976 session->target_id = ISCSI_MAX_TARGET; 1977 spin_unlock_irqrestore(&session->lock, flags); 1978 mutex_unlock(&ihost->mutex); 1979 1980 scsi_remove_target(&session->dev); 1981 1982 if (session->ida_used) 1983 ida_simple_remove(&iscsi_sess_ida, target_id); 1984 1985 unbind_session_exit: 1986 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 1987 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 1988 } 1989 1990 static void __iscsi_destroy_session(struct work_struct *work) 1991 { 1992 struct iscsi_cls_session *session = 1993 container_of(work, struct iscsi_cls_session, destroy_work); 1994 1995 session->transport->destroy_session(session); 1996 } 1997 1998 struct iscsi_cls_session * 1999 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2000 int dd_size) 2001 { 2002 struct iscsi_cls_session *session; 2003 2004 session = kzalloc(sizeof(*session) + dd_size, 2005 GFP_KERNEL); 2006 if (!session) 2007 return NULL; 2008 2009 session->transport = transport; 2010 session->creator = -1; 2011 session->recovery_tmo = 120; 2012 session->recovery_tmo_sysfs_override = false; 2013 session->state = ISCSI_SESSION_FREE; 2014 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2015 INIT_LIST_HEAD(&session->sess_list); 2016 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2017 INIT_WORK(&session->block_work, __iscsi_block_session); 2018 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2019 INIT_WORK(&session->scan_work, iscsi_scan_session); 2020 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2021 spin_lock_init(&session->lock); 2022 2023 /* this is released in the dev's release function */ 2024 scsi_host_get(shost); 2025 session->dev.parent = &shost->shost_gendev; 2026 session->dev.release = iscsi_session_release; 2027 device_initialize(&session->dev); 2028 if (dd_size) 2029 session->dd_data = &session[1]; 2030 2031 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2032 return session; 2033 } 2034 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2035 2036 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2037 { 2038 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2039 unsigned long flags; 2040 int id = 0; 2041 int err; 2042 2043 session->sid = atomic_add_return(1, &iscsi_session_nr); 2044 2045 session->workq = alloc_workqueue("iscsi_ctrl_%d:%d", 2046 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 2047 shost->host_no, session->sid); 2048 if (!session->workq) 2049 return -ENOMEM; 2050 2051 if (target_id == ISCSI_MAX_TARGET) { 2052 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); 2053 2054 if (id < 0) { 2055 iscsi_cls_session_printk(KERN_ERR, session, 2056 "Failure in Target ID Allocation\n"); 2057 err = id; 2058 goto destroy_wq; 2059 } 2060 session->target_id = (unsigned int)id; 2061 session->ida_used = true; 2062 } else 2063 session->target_id = target_id; 2064 2065 dev_set_name(&session->dev, "session%u", session->sid); 2066 err = device_add(&session->dev); 2067 if (err) { 2068 iscsi_cls_session_printk(KERN_ERR, session, 2069 "could not register session's dev\n"); 2070 goto release_ida; 2071 } 2072 err = transport_register_device(&session->dev); 2073 if (err) { 2074 iscsi_cls_session_printk(KERN_ERR, session, 2075 "could not register transport's dev\n"); 2076 goto release_dev; 2077 } 2078 2079 spin_lock_irqsave(&sesslock, flags); 2080 list_add(&session->sess_list, &sesslist); 2081 spin_unlock_irqrestore(&sesslock, flags); 2082 2083 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2084 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2085 return 0; 2086 2087 release_dev: 2088 device_del(&session->dev); 2089 release_ida: 2090 if (session->ida_used) 2091 ida_simple_remove(&iscsi_sess_ida, session->target_id); 2092 destroy_wq: 2093 destroy_workqueue(session->workq); 2094 return err; 2095 } 2096 EXPORT_SYMBOL_GPL(iscsi_add_session); 2097 2098 /** 2099 * iscsi_create_session - create iscsi class session 2100 * @shost: scsi host 2101 * @transport: iscsi transport 2102 * @dd_size: private driver data size 2103 * @target_id: which target 2104 * 2105 * This can be called from a LLD or iscsi_transport. 2106 */ 2107 struct iscsi_cls_session * 2108 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2109 int dd_size, unsigned int target_id) 2110 { 2111 struct iscsi_cls_session *session; 2112 2113 session = iscsi_alloc_session(shost, transport, dd_size); 2114 if (!session) 2115 return NULL; 2116 2117 if (iscsi_add_session(session, target_id)) { 2118 iscsi_free_session(session); 2119 return NULL; 2120 } 2121 return session; 2122 } 2123 EXPORT_SYMBOL_GPL(iscsi_create_session); 2124 2125 static void iscsi_conn_release(struct device *dev) 2126 { 2127 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2128 struct device *parent = conn->dev.parent; 2129 2130 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2131 kfree(conn); 2132 put_device(parent); 2133 } 2134 2135 static int iscsi_is_conn_dev(const struct device *dev) 2136 { 2137 return dev->release == iscsi_conn_release; 2138 } 2139 2140 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2141 { 2142 if (!iscsi_is_conn_dev(dev)) 2143 return 0; 2144 2145 iscsi_remove_conn(iscsi_dev_to_conn(dev)); 2146 iscsi_put_conn(iscsi_dev_to_conn(dev)); 2147 2148 return 0; 2149 } 2150 2151 void iscsi_remove_session(struct iscsi_cls_session *session) 2152 { 2153 unsigned long flags; 2154 int err; 2155 2156 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2157 2158 spin_lock_irqsave(&sesslock, flags); 2159 if (!list_empty(&session->sess_list)) 2160 list_del(&session->sess_list); 2161 spin_unlock_irqrestore(&sesslock, flags); 2162 2163 if (!cancel_work_sync(&session->block_work)) 2164 cancel_delayed_work_sync(&session->recovery_work); 2165 cancel_work_sync(&session->unblock_work); 2166 /* 2167 * If we are blocked let commands flow again. The lld or iscsi 2168 * layer should set up the queuecommand to fail commands. 2169 * We assume that LLD will not be calling block/unblock while 2170 * removing the session. 2171 */ 2172 spin_lock_irqsave(&session->lock, flags); 2173 session->state = ISCSI_SESSION_FREE; 2174 spin_unlock_irqrestore(&session->lock, flags); 2175 2176 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2177 /* 2178 * qla4xxx can perform it's own scans when it runs in kernel only 2179 * mode. Make sure to flush those scans. 2180 */ 2181 flush_work(&session->scan_work); 2182 /* flush running unbind operations */ 2183 flush_work(&session->unbind_work); 2184 __iscsi_unbind_session(&session->unbind_work); 2185 2186 /* hw iscsi may not have removed all connections from session */ 2187 err = device_for_each_child(&session->dev, NULL, 2188 iscsi_iter_destroy_conn_fn); 2189 if (err) 2190 iscsi_cls_session_printk(KERN_ERR, session, 2191 "Could not delete all connections " 2192 "for session. Error %d.\n", err); 2193 2194 transport_unregister_device(&session->dev); 2195 2196 destroy_workqueue(session->workq); 2197 2198 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2199 device_del(&session->dev); 2200 } 2201 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2202 2203 static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag) 2204 { 2205 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n"); 2206 2207 switch (flag) { 2208 case STOP_CONN_RECOVER: 2209 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2210 break; 2211 case STOP_CONN_TERM: 2212 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2213 break; 2214 default: 2215 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n", 2216 flag); 2217 return; 2218 } 2219 2220 conn->transport->stop_conn(conn, flag); 2221 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n"); 2222 } 2223 2224 static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active) 2225 { 2226 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2227 struct iscsi_endpoint *ep; 2228 2229 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n"); 2230 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2231 2232 if (!conn->ep || !session->transport->ep_disconnect) 2233 return; 2234 2235 ep = conn->ep; 2236 conn->ep = NULL; 2237 2238 session->transport->unbind_conn(conn, is_active); 2239 session->transport->ep_disconnect(ep); 2240 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n"); 2241 } 2242 2243 static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn, 2244 struct iscsi_endpoint *ep, 2245 bool is_active) 2246 { 2247 /* Check if this was a conn error and the kernel took ownership */ 2248 spin_lock_irq(&conn->lock); 2249 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2250 spin_unlock_irq(&conn->lock); 2251 iscsi_ep_disconnect(conn, is_active); 2252 } else { 2253 spin_unlock_irq(&conn->lock); 2254 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n"); 2255 mutex_unlock(&conn->ep_mutex); 2256 2257 flush_work(&conn->cleanup_work); 2258 /* 2259 * Userspace is now done with the EP so we can release the ref 2260 * iscsi_cleanup_conn_work_fn took. 2261 */ 2262 iscsi_put_endpoint(ep); 2263 mutex_lock(&conn->ep_mutex); 2264 } 2265 } 2266 2267 static int iscsi_if_stop_conn(struct iscsi_transport *transport, 2268 struct iscsi_uevent *ev) 2269 { 2270 int flag = ev->u.stop_conn.flag; 2271 struct iscsi_cls_conn *conn; 2272 2273 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 2274 if (!conn) 2275 return -EINVAL; 2276 2277 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n"); 2278 /* 2279 * If this is a termination we have to call stop_conn with that flag 2280 * so the correct states get set. If we haven't run the work yet try to 2281 * avoid the extra run. 2282 */ 2283 if (flag == STOP_CONN_TERM) { 2284 cancel_work_sync(&conn->cleanup_work); 2285 iscsi_stop_conn(conn, flag); 2286 } else { 2287 /* 2288 * For offload, when iscsid is restarted it won't know about 2289 * existing endpoints so it can't do a ep_disconnect. We clean 2290 * it up here for userspace. 2291 */ 2292 mutex_lock(&conn->ep_mutex); 2293 if (conn->ep) 2294 iscsi_if_disconnect_bound_ep(conn, conn->ep, true); 2295 mutex_unlock(&conn->ep_mutex); 2296 2297 /* 2298 * Figure out if it was the kernel or userspace initiating this. 2299 */ 2300 spin_lock_irq(&conn->lock); 2301 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2302 spin_unlock_irq(&conn->lock); 2303 iscsi_stop_conn(conn, flag); 2304 } else { 2305 spin_unlock_irq(&conn->lock); 2306 ISCSI_DBG_TRANS_CONN(conn, 2307 "flush kernel conn cleanup.\n"); 2308 flush_work(&conn->cleanup_work); 2309 } 2310 /* 2311 * Only clear for recovery to avoid extra cleanup runs during 2312 * termination. 2313 */ 2314 spin_lock_irq(&conn->lock); 2315 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags); 2316 spin_unlock_irq(&conn->lock); 2317 } 2318 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n"); 2319 return 0; 2320 } 2321 2322 static void iscsi_cleanup_conn_work_fn(struct work_struct *work) 2323 { 2324 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn, 2325 cleanup_work); 2326 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2327 2328 mutex_lock(&conn->ep_mutex); 2329 /* 2330 * Get a ref to the ep, so we don't release its ID until after 2331 * userspace is done referencing it in iscsi_if_disconnect_bound_ep. 2332 */ 2333 if (conn->ep) 2334 get_device(&conn->ep->dev); 2335 iscsi_ep_disconnect(conn, false); 2336 2337 if (system_state != SYSTEM_RUNNING) { 2338 /* 2339 * If the user has set up for the session to never timeout 2340 * then hang like they wanted. For all other cases fail right 2341 * away since userspace is not going to relogin. 2342 */ 2343 if (session->recovery_tmo > 0) 2344 session->recovery_tmo = 0; 2345 } 2346 2347 iscsi_stop_conn(conn, STOP_CONN_RECOVER); 2348 mutex_unlock(&conn->ep_mutex); 2349 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n"); 2350 } 2351 2352 void iscsi_free_session(struct iscsi_cls_session *session) 2353 { 2354 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2355 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2356 put_device(&session->dev); 2357 } 2358 EXPORT_SYMBOL_GPL(iscsi_free_session); 2359 2360 /** 2361 * iscsi_alloc_conn - alloc iscsi class connection 2362 * @session: iscsi cls session 2363 * @dd_size: private driver data size 2364 * @cid: connection id 2365 */ 2366 struct iscsi_cls_conn * 2367 iscsi_alloc_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2368 { 2369 struct iscsi_transport *transport = session->transport; 2370 struct iscsi_cls_conn *conn; 2371 2372 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2373 if (!conn) 2374 return NULL; 2375 if (dd_size) 2376 conn->dd_data = &conn[1]; 2377 2378 mutex_init(&conn->ep_mutex); 2379 spin_lock_init(&conn->lock); 2380 INIT_LIST_HEAD(&conn->conn_list); 2381 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn); 2382 conn->transport = transport; 2383 conn->cid = cid; 2384 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2385 2386 /* this is released in the dev's release function */ 2387 if (!get_device(&session->dev)) 2388 goto free_conn; 2389 2390 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2391 device_initialize(&conn->dev); 2392 conn->dev.parent = &session->dev; 2393 conn->dev.release = iscsi_conn_release; 2394 2395 return conn; 2396 2397 free_conn: 2398 kfree(conn); 2399 return NULL; 2400 } 2401 EXPORT_SYMBOL_GPL(iscsi_alloc_conn); 2402 2403 /** 2404 * iscsi_add_conn - add iscsi class connection 2405 * @conn: iscsi cls connection 2406 * 2407 * This will expose iscsi_cls_conn to sysfs so make sure the related 2408 * resources for sysfs attributes are initialized before calling this. 2409 */ 2410 int iscsi_add_conn(struct iscsi_cls_conn *conn) 2411 { 2412 int err; 2413 unsigned long flags; 2414 struct iscsi_cls_session *session = iscsi_dev_to_session(conn->dev.parent); 2415 2416 err = device_add(&conn->dev); 2417 if (err) { 2418 iscsi_cls_session_printk(KERN_ERR, session, 2419 "could not register connection's dev\n"); 2420 return err; 2421 } 2422 err = transport_register_device(&conn->dev); 2423 if (err) { 2424 iscsi_cls_session_printk(KERN_ERR, session, 2425 "could not register transport's dev\n"); 2426 device_del(&conn->dev); 2427 return err; 2428 } 2429 2430 spin_lock_irqsave(&connlock, flags); 2431 list_add(&conn->conn_list, &connlist); 2432 spin_unlock_irqrestore(&connlock, flags); 2433 2434 return 0; 2435 } 2436 EXPORT_SYMBOL_GPL(iscsi_add_conn); 2437 2438 /** 2439 * iscsi_remove_conn - remove iscsi class connection from sysfs 2440 * @conn: iscsi cls connection 2441 * 2442 * Remove iscsi_cls_conn from sysfs, and wait for previous 2443 * read/write of iscsi_cls_conn's attributes in sysfs to finish. 2444 */ 2445 void iscsi_remove_conn(struct iscsi_cls_conn *conn) 2446 { 2447 unsigned long flags; 2448 2449 spin_lock_irqsave(&connlock, flags); 2450 list_del(&conn->conn_list); 2451 spin_unlock_irqrestore(&connlock, flags); 2452 2453 transport_unregister_device(&conn->dev); 2454 device_del(&conn->dev); 2455 } 2456 EXPORT_SYMBOL_GPL(iscsi_remove_conn); 2457 2458 void iscsi_put_conn(struct iscsi_cls_conn *conn) 2459 { 2460 put_device(&conn->dev); 2461 } 2462 EXPORT_SYMBOL_GPL(iscsi_put_conn); 2463 2464 void iscsi_get_conn(struct iscsi_cls_conn *conn) 2465 { 2466 get_device(&conn->dev); 2467 } 2468 EXPORT_SYMBOL_GPL(iscsi_get_conn); 2469 2470 /* 2471 * iscsi interface functions 2472 */ 2473 static struct iscsi_internal * 2474 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2475 { 2476 struct iscsi_internal *priv; 2477 unsigned long flags; 2478 2479 spin_lock_irqsave(&iscsi_transport_lock, flags); 2480 list_for_each_entry(priv, &iscsi_transports, list) { 2481 if (tt == priv->iscsi_transport) { 2482 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2483 return priv; 2484 } 2485 } 2486 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2487 return NULL; 2488 } 2489 2490 static int 2491 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2492 { 2493 return nlmsg_multicast(nls, skb, 0, group, gfp); 2494 } 2495 2496 static int 2497 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2498 { 2499 return nlmsg_unicast(nls, skb, portid); 2500 } 2501 2502 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2503 char *data, uint32_t data_size) 2504 { 2505 struct nlmsghdr *nlh; 2506 struct sk_buff *skb; 2507 struct iscsi_uevent *ev; 2508 char *pdu; 2509 struct iscsi_internal *priv; 2510 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2511 data_size); 2512 2513 priv = iscsi_if_transport_lookup(conn->transport); 2514 if (!priv) 2515 return -EINVAL; 2516 2517 skb = alloc_skb(len, GFP_ATOMIC); 2518 if (!skb) { 2519 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2520 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2521 "control PDU: OOM\n"); 2522 return -ENOMEM; 2523 } 2524 2525 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2526 ev = nlmsg_data(nlh); 2527 memset(ev, 0, sizeof(*ev)); 2528 ev->transport_handle = iscsi_handle(conn->transport); 2529 ev->type = ISCSI_KEVENT_RECV_PDU; 2530 ev->r.recv_req.cid = conn->cid; 2531 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2532 pdu = (char*)ev + sizeof(*ev); 2533 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2534 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2535 2536 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2537 } 2538 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2539 2540 int iscsi_offload_mesg(struct Scsi_Host *shost, 2541 struct iscsi_transport *transport, uint32_t type, 2542 char *data, uint16_t data_size) 2543 { 2544 struct nlmsghdr *nlh; 2545 struct sk_buff *skb; 2546 struct iscsi_uevent *ev; 2547 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2548 2549 skb = alloc_skb(len, GFP_ATOMIC); 2550 if (!skb) { 2551 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2552 return -ENOMEM; 2553 } 2554 2555 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2556 ev = nlmsg_data(nlh); 2557 memset(ev, 0, sizeof(*ev)); 2558 ev->type = type; 2559 ev->transport_handle = iscsi_handle(transport); 2560 switch (type) { 2561 case ISCSI_KEVENT_PATH_REQ: 2562 ev->r.req_path.host_no = shost->host_no; 2563 break; 2564 case ISCSI_KEVENT_IF_DOWN: 2565 ev->r.notify_if_down.host_no = shost->host_no; 2566 break; 2567 } 2568 2569 memcpy((char *)ev + sizeof(*ev), data, data_size); 2570 2571 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2572 } 2573 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2574 2575 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2576 { 2577 struct nlmsghdr *nlh; 2578 struct sk_buff *skb; 2579 struct iscsi_uevent *ev; 2580 struct iscsi_internal *priv; 2581 int len = nlmsg_total_size(sizeof(*ev)); 2582 unsigned long flags; 2583 int state; 2584 2585 spin_lock_irqsave(&conn->lock, flags); 2586 /* 2587 * Userspace will only do a stop call if we are at least bound. And, we 2588 * only need to do the in kernel cleanup if in the UP state so cmds can 2589 * be released to upper layers. If in other states just wait for 2590 * userspace to avoid races that can leave the cleanup_work queued. 2591 */ 2592 state = READ_ONCE(conn->state); 2593 switch (state) { 2594 case ISCSI_CONN_BOUND: 2595 case ISCSI_CONN_UP: 2596 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, 2597 &conn->flags)) { 2598 queue_work(iscsi_conn_cleanup_workq, 2599 &conn->cleanup_work); 2600 } 2601 break; 2602 default: 2603 ISCSI_DBG_TRANS_CONN(conn, "Got conn error in state %d\n", 2604 state); 2605 break; 2606 } 2607 spin_unlock_irqrestore(&conn->lock, flags); 2608 2609 priv = iscsi_if_transport_lookup(conn->transport); 2610 if (!priv) 2611 return; 2612 2613 skb = alloc_skb(len, GFP_ATOMIC); 2614 if (!skb) { 2615 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2616 "conn error (%d)\n", error); 2617 return; 2618 } 2619 2620 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2621 ev = nlmsg_data(nlh); 2622 ev->transport_handle = iscsi_handle(conn->transport); 2623 ev->type = ISCSI_KEVENT_CONN_ERROR; 2624 ev->r.connerror.error = error; 2625 ev->r.connerror.cid = conn->cid; 2626 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2627 2628 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2629 2630 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2631 error); 2632 } 2633 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2634 2635 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2636 enum iscsi_conn_state state) 2637 { 2638 struct nlmsghdr *nlh; 2639 struct sk_buff *skb; 2640 struct iscsi_uevent *ev; 2641 struct iscsi_internal *priv; 2642 int len = nlmsg_total_size(sizeof(*ev)); 2643 2644 priv = iscsi_if_transport_lookup(conn->transport); 2645 if (!priv) 2646 return; 2647 2648 skb = alloc_skb(len, GFP_ATOMIC); 2649 if (!skb) { 2650 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2651 "conn login (%d)\n", state); 2652 return; 2653 } 2654 2655 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2656 ev = nlmsg_data(nlh); 2657 ev->transport_handle = iscsi_handle(conn->transport); 2658 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2659 ev->r.conn_login.state = state; 2660 ev->r.conn_login.cid = conn->cid; 2661 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2662 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2663 2664 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2665 state); 2666 } 2667 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2668 2669 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2670 enum iscsi_host_event_code code, uint32_t data_size, 2671 uint8_t *data) 2672 { 2673 struct nlmsghdr *nlh; 2674 struct sk_buff *skb; 2675 struct iscsi_uevent *ev; 2676 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2677 2678 skb = alloc_skb(len, GFP_NOIO); 2679 if (!skb) { 2680 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2681 host_no, code); 2682 return; 2683 } 2684 2685 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2686 ev = nlmsg_data(nlh); 2687 ev->transport_handle = iscsi_handle(transport); 2688 ev->type = ISCSI_KEVENT_HOST_EVENT; 2689 ev->r.host_event.host_no = host_no; 2690 ev->r.host_event.code = code; 2691 ev->r.host_event.data_size = data_size; 2692 2693 if (data_size) 2694 memcpy((char *)ev + sizeof(*ev), data, data_size); 2695 2696 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2697 } 2698 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2699 2700 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2701 uint32_t status, uint32_t pid, uint32_t data_size, 2702 uint8_t *data) 2703 { 2704 struct nlmsghdr *nlh; 2705 struct sk_buff *skb; 2706 struct iscsi_uevent *ev; 2707 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2708 2709 skb = alloc_skb(len, GFP_NOIO); 2710 if (!skb) { 2711 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2712 return; 2713 } 2714 2715 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2716 ev = nlmsg_data(nlh); 2717 ev->transport_handle = iscsi_handle(transport); 2718 ev->type = ISCSI_KEVENT_PING_COMP; 2719 ev->r.ping_comp.host_no = host_no; 2720 ev->r.ping_comp.status = status; 2721 ev->r.ping_comp.pid = pid; 2722 ev->r.ping_comp.data_size = data_size; 2723 memcpy((char *)ev + sizeof(*ev), data, data_size); 2724 2725 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2726 } 2727 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2728 2729 static int 2730 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2731 { 2732 struct sk_buff *skb; 2733 struct nlmsghdr *nlh; 2734 int len = nlmsg_total_size(size); 2735 2736 skb = alloc_skb(len, GFP_ATOMIC); 2737 if (!skb) { 2738 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2739 return -ENOMEM; 2740 } 2741 2742 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2743 memcpy(nlmsg_data(nlh), payload, size); 2744 return iscsi_unicast_skb(skb, portid); 2745 } 2746 2747 static int 2748 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2749 { 2750 struct iscsi_uevent *ev = nlmsg_data(nlh); 2751 struct iscsi_stats *stats; 2752 struct sk_buff *skbstat; 2753 struct iscsi_cls_conn *conn; 2754 struct nlmsghdr *nlhstat; 2755 struct iscsi_uevent *evstat; 2756 struct iscsi_internal *priv; 2757 int len = nlmsg_total_size(sizeof(*ev) + 2758 sizeof(struct iscsi_stats) + 2759 sizeof(struct iscsi_stats_custom) * 2760 ISCSI_STATS_CUSTOM_MAX); 2761 int err = 0; 2762 2763 priv = iscsi_if_transport_lookup(transport); 2764 if (!priv) 2765 return -EINVAL; 2766 2767 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2768 if (!conn) 2769 return -EEXIST; 2770 2771 do { 2772 int actual_size; 2773 2774 skbstat = alloc_skb(len, GFP_ATOMIC); 2775 if (!skbstat) { 2776 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2777 "deliver stats: OOM\n"); 2778 return -ENOMEM; 2779 } 2780 2781 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2782 (len - sizeof(*nlhstat)), 0); 2783 evstat = nlmsg_data(nlhstat); 2784 memset(evstat, 0, sizeof(*evstat)); 2785 evstat->transport_handle = iscsi_handle(conn->transport); 2786 evstat->type = nlh->nlmsg_type; 2787 evstat->u.get_stats.cid = 2788 ev->u.get_stats.cid; 2789 evstat->u.get_stats.sid = 2790 ev->u.get_stats.sid; 2791 stats = (struct iscsi_stats *) 2792 ((char*)evstat + sizeof(*evstat)); 2793 memset(stats, 0, sizeof(*stats)); 2794 2795 transport->get_stats(conn, stats); 2796 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2797 sizeof(struct iscsi_stats) + 2798 sizeof(struct iscsi_stats_custom) * 2799 stats->custom_length); 2800 actual_size -= sizeof(*nlhstat); 2801 actual_size = nlmsg_msg_size(actual_size); 2802 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2803 nlhstat->nlmsg_len = actual_size; 2804 2805 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2806 GFP_ATOMIC); 2807 } while (err < 0 && err != -ECONNREFUSED); 2808 2809 return err; 2810 } 2811 2812 /** 2813 * iscsi_session_event - send session destr. completion event 2814 * @session: iscsi class session 2815 * @event: type of event 2816 */ 2817 int iscsi_session_event(struct iscsi_cls_session *session, 2818 enum iscsi_uevent_e event) 2819 { 2820 struct iscsi_internal *priv; 2821 struct Scsi_Host *shost; 2822 struct iscsi_uevent *ev; 2823 struct sk_buff *skb; 2824 struct nlmsghdr *nlh; 2825 int rc, len = nlmsg_total_size(sizeof(*ev)); 2826 2827 priv = iscsi_if_transport_lookup(session->transport); 2828 if (!priv) 2829 return -EINVAL; 2830 shost = iscsi_session_to_shost(session); 2831 2832 skb = alloc_skb(len, GFP_KERNEL); 2833 if (!skb) { 2834 iscsi_cls_session_printk(KERN_ERR, session, 2835 "Cannot notify userspace of session " 2836 "event %u\n", event); 2837 return -ENOMEM; 2838 } 2839 2840 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2841 ev = nlmsg_data(nlh); 2842 ev->transport_handle = iscsi_handle(session->transport); 2843 2844 ev->type = event; 2845 switch (event) { 2846 case ISCSI_KEVENT_DESTROY_SESSION: 2847 ev->r.d_session.host_no = shost->host_no; 2848 ev->r.d_session.sid = session->sid; 2849 break; 2850 case ISCSI_KEVENT_CREATE_SESSION: 2851 ev->r.c_session_ret.host_no = shost->host_no; 2852 ev->r.c_session_ret.sid = session->sid; 2853 break; 2854 case ISCSI_KEVENT_UNBIND_SESSION: 2855 ev->r.unbind_session.host_no = shost->host_no; 2856 ev->r.unbind_session.sid = session->sid; 2857 break; 2858 default: 2859 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2860 "%u.\n", event); 2861 kfree_skb(skb); 2862 return -EINVAL; 2863 } 2864 2865 /* 2866 * this will occur if the daemon is not up, so we just warn 2867 * the user and when the daemon is restarted it will handle it 2868 */ 2869 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2870 if (rc == -ESRCH) 2871 iscsi_cls_session_printk(KERN_ERR, session, 2872 "Cannot notify userspace of session " 2873 "event %u. Check iscsi daemon\n", 2874 event); 2875 2876 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2877 event, rc); 2878 return rc; 2879 } 2880 EXPORT_SYMBOL_GPL(iscsi_session_event); 2881 2882 static int 2883 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2884 struct iscsi_uevent *ev, pid_t pid, 2885 uint32_t initial_cmdsn, uint16_t cmds_max, 2886 uint16_t queue_depth) 2887 { 2888 struct iscsi_transport *transport = priv->iscsi_transport; 2889 struct iscsi_cls_session *session; 2890 struct Scsi_Host *shost; 2891 2892 session = transport->create_session(ep, cmds_max, queue_depth, 2893 initial_cmdsn); 2894 if (!session) 2895 return -ENOMEM; 2896 2897 session->creator = pid; 2898 shost = iscsi_session_to_shost(session); 2899 ev->r.c_session_ret.host_no = shost->host_no; 2900 ev->r.c_session_ret.sid = session->sid; 2901 ISCSI_DBG_TRANS_SESSION(session, 2902 "Completed creating transport session\n"); 2903 return 0; 2904 } 2905 2906 static int 2907 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2908 { 2909 struct iscsi_cls_conn *conn; 2910 struct iscsi_cls_session *session; 2911 2912 session = iscsi_session_lookup(ev->u.c_conn.sid); 2913 if (!session) { 2914 printk(KERN_ERR "iscsi: invalid session %d.\n", 2915 ev->u.c_conn.sid); 2916 return -EINVAL; 2917 } 2918 2919 conn = transport->create_conn(session, ev->u.c_conn.cid); 2920 if (!conn) { 2921 iscsi_cls_session_printk(KERN_ERR, session, 2922 "couldn't create a new connection."); 2923 return -ENOMEM; 2924 } 2925 2926 ev->r.c_conn_ret.sid = session->sid; 2927 ev->r.c_conn_ret.cid = conn->cid; 2928 2929 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2930 return 0; 2931 } 2932 2933 static int 2934 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2935 { 2936 struct iscsi_cls_conn *conn; 2937 2938 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2939 if (!conn) 2940 return -EINVAL; 2941 2942 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n"); 2943 flush_work(&conn->cleanup_work); 2944 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2945 2946 if (transport->destroy_conn) 2947 transport->destroy_conn(conn); 2948 return 0; 2949 } 2950 2951 static int 2952 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2953 { 2954 char *data = (char*)ev + sizeof(*ev); 2955 struct iscsi_cls_conn *conn; 2956 struct iscsi_cls_session *session; 2957 int err = 0, value = 0, state; 2958 2959 if (ev->u.set_param.len > PAGE_SIZE) 2960 return -EINVAL; 2961 2962 session = iscsi_session_lookup(ev->u.set_param.sid); 2963 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2964 if (!conn || !session) 2965 return -EINVAL; 2966 2967 switch (ev->u.set_param.param) { 2968 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2969 sscanf(data, "%d", &value); 2970 if (!session->recovery_tmo_sysfs_override) 2971 session->recovery_tmo = value; 2972 break; 2973 default: 2974 state = READ_ONCE(conn->state); 2975 if (state == ISCSI_CONN_BOUND || state == ISCSI_CONN_UP) { 2976 err = transport->set_param(conn, ev->u.set_param.param, 2977 data, ev->u.set_param.len); 2978 } else { 2979 return -ENOTCONN; 2980 } 2981 } 2982 2983 return err; 2984 } 2985 2986 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2987 struct iscsi_uevent *ev, int msg_type) 2988 { 2989 struct iscsi_endpoint *ep; 2990 struct sockaddr *dst_addr; 2991 struct Scsi_Host *shost = NULL; 2992 int non_blocking, err = 0; 2993 2994 if (!transport->ep_connect) 2995 return -EINVAL; 2996 2997 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2998 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2999 if (!shost) { 3000 printk(KERN_ERR "ep connect failed. Could not find " 3001 "host no %u\n", 3002 ev->u.ep_connect_through_host.host_no); 3003 return -ENODEV; 3004 } 3005 non_blocking = ev->u.ep_connect_through_host.non_blocking; 3006 } else 3007 non_blocking = ev->u.ep_connect.non_blocking; 3008 3009 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3010 ep = transport->ep_connect(shost, dst_addr, non_blocking); 3011 if (IS_ERR(ep)) { 3012 err = PTR_ERR(ep); 3013 goto release_host; 3014 } 3015 3016 ev->r.ep_connect_ret.handle = ep->id; 3017 release_host: 3018 if (shost) 3019 scsi_host_put(shost); 3020 return err; 3021 } 3022 3023 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 3024 u64 ep_handle) 3025 { 3026 struct iscsi_cls_conn *conn; 3027 struct iscsi_endpoint *ep; 3028 3029 if (!transport->ep_disconnect) 3030 return -EINVAL; 3031 3032 ep = iscsi_lookup_endpoint(ep_handle); 3033 if (!ep) 3034 return -EINVAL; 3035 3036 conn = ep->conn; 3037 if (!conn) { 3038 /* 3039 * conn was not even bound yet, so we can't get iscsi conn 3040 * failures yet. 3041 */ 3042 transport->ep_disconnect(ep); 3043 goto put_ep; 3044 } 3045 3046 mutex_lock(&conn->ep_mutex); 3047 iscsi_if_disconnect_bound_ep(conn, ep, false); 3048 mutex_unlock(&conn->ep_mutex); 3049 put_ep: 3050 iscsi_put_endpoint(ep); 3051 return 0; 3052 } 3053 3054 static int 3055 iscsi_if_transport_ep(struct iscsi_transport *transport, 3056 struct iscsi_uevent *ev, int msg_type) 3057 { 3058 struct iscsi_endpoint *ep; 3059 int rc = 0; 3060 3061 switch (msg_type) { 3062 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3063 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3064 rc = iscsi_if_ep_connect(transport, ev, msg_type); 3065 break; 3066 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3067 if (!transport->ep_poll) 3068 return -EINVAL; 3069 3070 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 3071 if (!ep) 3072 return -EINVAL; 3073 3074 ev->r.retcode = transport->ep_poll(ep, 3075 ev->u.ep_poll.timeout_ms); 3076 iscsi_put_endpoint(ep); 3077 break; 3078 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3079 rc = iscsi_if_ep_disconnect(transport, 3080 ev->u.ep_disconnect.ep_handle); 3081 break; 3082 } 3083 return rc; 3084 } 3085 3086 static int 3087 iscsi_tgt_dscvr(struct iscsi_transport *transport, 3088 struct iscsi_uevent *ev) 3089 { 3090 struct Scsi_Host *shost; 3091 struct sockaddr *dst_addr; 3092 int err; 3093 3094 if (!transport->tgt_dscvr) 3095 return -EINVAL; 3096 3097 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3098 if (!shost) { 3099 printk(KERN_ERR "target discovery could not find host no %u\n", 3100 ev->u.tgt_dscvr.host_no); 3101 return -ENODEV; 3102 } 3103 3104 3105 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3106 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3107 ev->u.tgt_dscvr.enable, dst_addr); 3108 scsi_host_put(shost); 3109 return err; 3110 } 3111 3112 static int 3113 iscsi_set_host_param(struct iscsi_transport *transport, 3114 struct iscsi_uevent *ev) 3115 { 3116 char *data = (char*)ev + sizeof(*ev); 3117 struct Scsi_Host *shost; 3118 int err; 3119 3120 if (!transport->set_host_param) 3121 return -ENOSYS; 3122 3123 if (ev->u.set_host_param.len > PAGE_SIZE) 3124 return -EINVAL; 3125 3126 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3127 if (!shost) { 3128 printk(KERN_ERR "set_host_param could not find host no %u\n", 3129 ev->u.set_host_param.host_no); 3130 return -ENODEV; 3131 } 3132 3133 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3134 data, ev->u.set_host_param.len); 3135 scsi_host_put(shost); 3136 return err; 3137 } 3138 3139 static int 3140 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3141 { 3142 struct Scsi_Host *shost; 3143 struct iscsi_path *params; 3144 int err; 3145 3146 if (!transport->set_path) 3147 return -ENOSYS; 3148 3149 shost = scsi_host_lookup(ev->u.set_path.host_no); 3150 if (!shost) { 3151 printk(KERN_ERR "set path could not find host no %u\n", 3152 ev->u.set_path.host_no); 3153 return -ENODEV; 3154 } 3155 3156 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3157 err = transport->set_path(shost, params); 3158 3159 scsi_host_put(shost); 3160 return err; 3161 } 3162 3163 static int iscsi_session_has_conns(int sid) 3164 { 3165 struct iscsi_cls_conn *conn; 3166 unsigned long flags; 3167 int found = 0; 3168 3169 spin_lock_irqsave(&connlock, flags); 3170 list_for_each_entry(conn, &connlist, conn_list) { 3171 if (iscsi_conn_get_sid(conn) == sid) { 3172 found = 1; 3173 break; 3174 } 3175 } 3176 spin_unlock_irqrestore(&connlock, flags); 3177 3178 return found; 3179 } 3180 3181 static int 3182 iscsi_set_iface_params(struct iscsi_transport *transport, 3183 struct iscsi_uevent *ev, uint32_t len) 3184 { 3185 char *data = (char *)ev + sizeof(*ev); 3186 struct Scsi_Host *shost; 3187 int err; 3188 3189 if (!transport->set_iface_param) 3190 return -ENOSYS; 3191 3192 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3193 if (!shost) { 3194 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3195 ev->u.set_iface_params.host_no); 3196 return -ENODEV; 3197 } 3198 3199 err = transport->set_iface_param(shost, data, len); 3200 scsi_host_put(shost); 3201 return err; 3202 } 3203 3204 static int 3205 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3206 { 3207 struct Scsi_Host *shost; 3208 struct sockaddr *dst_addr; 3209 int err; 3210 3211 if (!transport->send_ping) 3212 return -ENOSYS; 3213 3214 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3215 if (!shost) { 3216 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3217 ev->u.iscsi_ping.host_no); 3218 return -ENODEV; 3219 } 3220 3221 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3222 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3223 ev->u.iscsi_ping.iface_type, 3224 ev->u.iscsi_ping.payload_size, 3225 ev->u.iscsi_ping.pid, 3226 dst_addr); 3227 scsi_host_put(shost); 3228 return err; 3229 } 3230 3231 static int 3232 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3233 { 3234 struct iscsi_uevent *ev = nlmsg_data(nlh); 3235 struct Scsi_Host *shost = NULL; 3236 struct iscsi_chap_rec *chap_rec; 3237 struct iscsi_internal *priv; 3238 struct sk_buff *skbchap; 3239 struct nlmsghdr *nlhchap; 3240 struct iscsi_uevent *evchap; 3241 uint32_t chap_buf_size; 3242 int len, err = 0; 3243 char *buf; 3244 3245 if (!transport->get_chap) 3246 return -EINVAL; 3247 3248 priv = iscsi_if_transport_lookup(transport); 3249 if (!priv) 3250 return -EINVAL; 3251 3252 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3253 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3254 3255 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3256 if (!shost) { 3257 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3258 __func__, ev->u.get_chap.host_no); 3259 return -ENODEV; 3260 } 3261 3262 do { 3263 int actual_size; 3264 3265 skbchap = alloc_skb(len, GFP_KERNEL); 3266 if (!skbchap) { 3267 printk(KERN_ERR "can not deliver chap: OOM\n"); 3268 err = -ENOMEM; 3269 goto exit_get_chap; 3270 } 3271 3272 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3273 (len - sizeof(*nlhchap)), 0); 3274 evchap = nlmsg_data(nlhchap); 3275 memset(evchap, 0, sizeof(*evchap)); 3276 evchap->transport_handle = iscsi_handle(transport); 3277 evchap->type = nlh->nlmsg_type; 3278 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3279 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3280 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3281 buf = (char *)evchap + sizeof(*evchap); 3282 memset(buf, 0, chap_buf_size); 3283 3284 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3285 &evchap->u.get_chap.num_entries, buf); 3286 3287 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3288 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3289 nlhchap->nlmsg_len = actual_size; 3290 3291 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3292 GFP_KERNEL); 3293 } while (err < 0 && err != -ECONNREFUSED); 3294 3295 exit_get_chap: 3296 scsi_host_put(shost); 3297 return err; 3298 } 3299 3300 static int iscsi_set_chap(struct iscsi_transport *transport, 3301 struct iscsi_uevent *ev, uint32_t len) 3302 { 3303 char *data = (char *)ev + sizeof(*ev); 3304 struct Scsi_Host *shost; 3305 int err = 0; 3306 3307 if (!transport->set_chap) 3308 return -ENOSYS; 3309 3310 shost = scsi_host_lookup(ev->u.set_path.host_no); 3311 if (!shost) { 3312 pr_err("%s could not find host no %u\n", 3313 __func__, ev->u.set_path.host_no); 3314 return -ENODEV; 3315 } 3316 3317 err = transport->set_chap(shost, data, len); 3318 scsi_host_put(shost); 3319 return err; 3320 } 3321 3322 static int iscsi_delete_chap(struct iscsi_transport *transport, 3323 struct iscsi_uevent *ev) 3324 { 3325 struct Scsi_Host *shost; 3326 int err = 0; 3327 3328 if (!transport->delete_chap) 3329 return -ENOSYS; 3330 3331 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3332 if (!shost) { 3333 printk(KERN_ERR "%s could not find host no %u\n", 3334 __func__, ev->u.delete_chap.host_no); 3335 return -ENODEV; 3336 } 3337 3338 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3339 scsi_host_put(shost); 3340 return err; 3341 } 3342 3343 static const struct { 3344 enum iscsi_discovery_parent_type value; 3345 char *name; 3346 } iscsi_discovery_parent_names[] = { 3347 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3348 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3349 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3350 }; 3351 3352 char *iscsi_get_discovery_parent_name(int parent_type) 3353 { 3354 int i; 3355 char *state = "Unknown!"; 3356 3357 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3358 if (iscsi_discovery_parent_names[i].value & parent_type) { 3359 state = iscsi_discovery_parent_names[i].name; 3360 break; 3361 } 3362 } 3363 return state; 3364 } 3365 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3366 3367 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3368 struct iscsi_uevent *ev, uint32_t len) 3369 { 3370 char *data = (char *)ev + sizeof(*ev); 3371 struct Scsi_Host *shost; 3372 struct iscsi_bus_flash_session *fnode_sess; 3373 struct iscsi_bus_flash_conn *fnode_conn; 3374 struct device *dev; 3375 uint32_t idx; 3376 int err = 0; 3377 3378 if (!transport->set_flashnode_param) { 3379 err = -ENOSYS; 3380 goto exit_set_fnode; 3381 } 3382 3383 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3384 if (!shost) { 3385 pr_err("%s could not find host no %u\n", 3386 __func__, ev->u.set_flashnode.host_no); 3387 err = -ENODEV; 3388 goto exit_set_fnode; 3389 } 3390 3391 idx = ev->u.set_flashnode.flashnode_idx; 3392 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3393 if (!fnode_sess) { 3394 pr_err("%s could not find flashnode %u for host no %u\n", 3395 __func__, idx, ev->u.set_flashnode.host_no); 3396 err = -ENODEV; 3397 goto put_host; 3398 } 3399 3400 dev = iscsi_find_flashnode_conn(fnode_sess); 3401 if (!dev) { 3402 err = -ENODEV; 3403 goto put_sess; 3404 } 3405 3406 fnode_conn = iscsi_dev_to_flash_conn(dev); 3407 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3408 put_device(dev); 3409 3410 put_sess: 3411 put_device(&fnode_sess->dev); 3412 3413 put_host: 3414 scsi_host_put(shost); 3415 3416 exit_set_fnode: 3417 return err; 3418 } 3419 3420 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3421 struct iscsi_uevent *ev, uint32_t len) 3422 { 3423 char *data = (char *)ev + sizeof(*ev); 3424 struct Scsi_Host *shost; 3425 int index; 3426 int err = 0; 3427 3428 if (!transport->new_flashnode) { 3429 err = -ENOSYS; 3430 goto exit_new_fnode; 3431 } 3432 3433 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3434 if (!shost) { 3435 pr_err("%s could not find host no %u\n", 3436 __func__, ev->u.new_flashnode.host_no); 3437 err = -ENODEV; 3438 goto put_host; 3439 } 3440 3441 index = transport->new_flashnode(shost, data, len); 3442 3443 if (index >= 0) 3444 ev->r.new_flashnode_ret.flashnode_idx = index; 3445 else 3446 err = -EIO; 3447 3448 put_host: 3449 scsi_host_put(shost); 3450 3451 exit_new_fnode: 3452 return err; 3453 } 3454 3455 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3456 struct iscsi_uevent *ev) 3457 { 3458 struct Scsi_Host *shost; 3459 struct iscsi_bus_flash_session *fnode_sess; 3460 uint32_t idx; 3461 int err = 0; 3462 3463 if (!transport->del_flashnode) { 3464 err = -ENOSYS; 3465 goto exit_del_fnode; 3466 } 3467 3468 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3469 if (!shost) { 3470 pr_err("%s could not find host no %u\n", 3471 __func__, ev->u.del_flashnode.host_no); 3472 err = -ENODEV; 3473 goto put_host; 3474 } 3475 3476 idx = ev->u.del_flashnode.flashnode_idx; 3477 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3478 if (!fnode_sess) { 3479 pr_err("%s could not find flashnode %u for host no %u\n", 3480 __func__, idx, ev->u.del_flashnode.host_no); 3481 err = -ENODEV; 3482 goto put_host; 3483 } 3484 3485 err = transport->del_flashnode(fnode_sess); 3486 put_device(&fnode_sess->dev); 3487 3488 put_host: 3489 scsi_host_put(shost); 3490 3491 exit_del_fnode: 3492 return err; 3493 } 3494 3495 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3496 struct iscsi_uevent *ev) 3497 { 3498 struct Scsi_Host *shost; 3499 struct iscsi_bus_flash_session *fnode_sess; 3500 struct iscsi_bus_flash_conn *fnode_conn; 3501 struct device *dev; 3502 uint32_t idx; 3503 int err = 0; 3504 3505 if (!transport->login_flashnode) { 3506 err = -ENOSYS; 3507 goto exit_login_fnode; 3508 } 3509 3510 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3511 if (!shost) { 3512 pr_err("%s could not find host no %u\n", 3513 __func__, ev->u.login_flashnode.host_no); 3514 err = -ENODEV; 3515 goto put_host; 3516 } 3517 3518 idx = ev->u.login_flashnode.flashnode_idx; 3519 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3520 if (!fnode_sess) { 3521 pr_err("%s could not find flashnode %u for host no %u\n", 3522 __func__, idx, ev->u.login_flashnode.host_no); 3523 err = -ENODEV; 3524 goto put_host; 3525 } 3526 3527 dev = iscsi_find_flashnode_conn(fnode_sess); 3528 if (!dev) { 3529 err = -ENODEV; 3530 goto put_sess; 3531 } 3532 3533 fnode_conn = iscsi_dev_to_flash_conn(dev); 3534 err = transport->login_flashnode(fnode_sess, fnode_conn); 3535 put_device(dev); 3536 3537 put_sess: 3538 put_device(&fnode_sess->dev); 3539 3540 put_host: 3541 scsi_host_put(shost); 3542 3543 exit_login_fnode: 3544 return err; 3545 } 3546 3547 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3548 struct iscsi_uevent *ev) 3549 { 3550 struct Scsi_Host *shost; 3551 struct iscsi_bus_flash_session *fnode_sess; 3552 struct iscsi_bus_flash_conn *fnode_conn; 3553 struct device *dev; 3554 uint32_t idx; 3555 int err = 0; 3556 3557 if (!transport->logout_flashnode) { 3558 err = -ENOSYS; 3559 goto exit_logout_fnode; 3560 } 3561 3562 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3563 if (!shost) { 3564 pr_err("%s could not find host no %u\n", 3565 __func__, ev->u.logout_flashnode.host_no); 3566 err = -ENODEV; 3567 goto put_host; 3568 } 3569 3570 idx = ev->u.logout_flashnode.flashnode_idx; 3571 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3572 if (!fnode_sess) { 3573 pr_err("%s could not find flashnode %u for host no %u\n", 3574 __func__, idx, ev->u.logout_flashnode.host_no); 3575 err = -ENODEV; 3576 goto put_host; 3577 } 3578 3579 dev = iscsi_find_flashnode_conn(fnode_sess); 3580 if (!dev) { 3581 err = -ENODEV; 3582 goto put_sess; 3583 } 3584 3585 fnode_conn = iscsi_dev_to_flash_conn(dev); 3586 3587 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3588 put_device(dev); 3589 3590 put_sess: 3591 put_device(&fnode_sess->dev); 3592 3593 put_host: 3594 scsi_host_put(shost); 3595 3596 exit_logout_fnode: 3597 return err; 3598 } 3599 3600 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3601 struct iscsi_uevent *ev) 3602 { 3603 struct Scsi_Host *shost; 3604 struct iscsi_cls_session *session; 3605 int err = 0; 3606 3607 if (!transport->logout_flashnode_sid) { 3608 err = -ENOSYS; 3609 goto exit_logout_sid; 3610 } 3611 3612 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3613 if (!shost) { 3614 pr_err("%s could not find host no %u\n", 3615 __func__, ev->u.logout_flashnode.host_no); 3616 err = -ENODEV; 3617 goto put_host; 3618 } 3619 3620 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3621 if (!session) { 3622 pr_err("%s could not find session id %u\n", 3623 __func__, ev->u.logout_flashnode_sid.sid); 3624 err = -EINVAL; 3625 goto put_host; 3626 } 3627 3628 err = transport->logout_flashnode_sid(session); 3629 3630 put_host: 3631 scsi_host_put(shost); 3632 3633 exit_logout_sid: 3634 return err; 3635 } 3636 3637 static int 3638 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3639 { 3640 struct iscsi_uevent *ev = nlmsg_data(nlh); 3641 struct Scsi_Host *shost = NULL; 3642 struct iscsi_internal *priv; 3643 struct sk_buff *skbhost_stats; 3644 struct nlmsghdr *nlhhost_stats; 3645 struct iscsi_uevent *evhost_stats; 3646 int host_stats_size = 0; 3647 int len, err = 0; 3648 char *buf; 3649 3650 if (!transport->get_host_stats) 3651 return -ENOSYS; 3652 3653 priv = iscsi_if_transport_lookup(transport); 3654 if (!priv) 3655 return -EINVAL; 3656 3657 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3658 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3659 3660 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3661 if (!shost) { 3662 pr_err("%s: failed. Could not find host no %u\n", 3663 __func__, ev->u.get_host_stats.host_no); 3664 return -ENODEV; 3665 } 3666 3667 do { 3668 int actual_size; 3669 3670 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3671 if (!skbhost_stats) { 3672 pr_err("cannot deliver host stats: OOM\n"); 3673 err = -ENOMEM; 3674 goto exit_host_stats; 3675 } 3676 3677 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3678 (len - sizeof(*nlhhost_stats)), 0); 3679 evhost_stats = nlmsg_data(nlhhost_stats); 3680 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3681 evhost_stats->transport_handle = iscsi_handle(transport); 3682 evhost_stats->type = nlh->nlmsg_type; 3683 evhost_stats->u.get_host_stats.host_no = 3684 ev->u.get_host_stats.host_no; 3685 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3686 memset(buf, 0, host_stats_size); 3687 3688 err = transport->get_host_stats(shost, buf, host_stats_size); 3689 if (err) { 3690 kfree_skb(skbhost_stats); 3691 goto exit_host_stats; 3692 } 3693 3694 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3695 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3696 nlhhost_stats->nlmsg_len = actual_size; 3697 3698 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3699 GFP_KERNEL); 3700 } while (err < 0 && err != -ECONNREFUSED); 3701 3702 exit_host_stats: 3703 scsi_host_put(shost); 3704 return err; 3705 } 3706 3707 static int iscsi_if_transport_conn(struct iscsi_transport *transport, 3708 struct nlmsghdr *nlh) 3709 { 3710 struct iscsi_uevent *ev = nlmsg_data(nlh); 3711 struct iscsi_cls_session *session; 3712 struct iscsi_cls_conn *conn = NULL; 3713 struct iscsi_endpoint *ep; 3714 uint32_t pdu_len; 3715 int err = 0; 3716 3717 switch (nlh->nlmsg_type) { 3718 case ISCSI_UEVENT_CREATE_CONN: 3719 return iscsi_if_create_conn(transport, ev); 3720 case ISCSI_UEVENT_DESTROY_CONN: 3721 return iscsi_if_destroy_conn(transport, ev); 3722 case ISCSI_UEVENT_STOP_CONN: 3723 return iscsi_if_stop_conn(transport, ev); 3724 } 3725 3726 /* 3727 * The following cmds need to be run under the ep_mutex so in kernel 3728 * conn cleanup (ep_disconnect + unbind and conn) is not done while 3729 * these are running. They also must not run if we have just run a conn 3730 * cleanup because they would set the state in a way that might allow 3731 * IO or send IO themselves. 3732 */ 3733 switch (nlh->nlmsg_type) { 3734 case ISCSI_UEVENT_START_CONN: 3735 conn = iscsi_conn_lookup(ev->u.start_conn.sid, 3736 ev->u.start_conn.cid); 3737 break; 3738 case ISCSI_UEVENT_BIND_CONN: 3739 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3740 break; 3741 case ISCSI_UEVENT_SEND_PDU: 3742 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3743 break; 3744 } 3745 3746 if (!conn) 3747 return -EINVAL; 3748 3749 mutex_lock(&conn->ep_mutex); 3750 spin_lock_irq(&conn->lock); 3751 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 3752 spin_unlock_irq(&conn->lock); 3753 mutex_unlock(&conn->ep_mutex); 3754 ev->r.retcode = -ENOTCONN; 3755 return 0; 3756 } 3757 spin_unlock_irq(&conn->lock); 3758 3759 switch (nlh->nlmsg_type) { 3760 case ISCSI_UEVENT_BIND_CONN: 3761 session = iscsi_session_lookup(ev->u.b_conn.sid); 3762 if (!session) { 3763 err = -EINVAL; 3764 break; 3765 } 3766 3767 ev->r.retcode = transport->bind_conn(session, conn, 3768 ev->u.b_conn.transport_eph, 3769 ev->u.b_conn.is_leading); 3770 if (!ev->r.retcode) 3771 WRITE_ONCE(conn->state, ISCSI_CONN_BOUND); 3772 3773 if (ev->r.retcode || !transport->ep_connect) 3774 break; 3775 3776 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3777 if (ep) { 3778 ep->conn = conn; 3779 conn->ep = ep; 3780 iscsi_put_endpoint(ep); 3781 } else { 3782 err = -ENOTCONN; 3783 iscsi_cls_conn_printk(KERN_ERR, conn, 3784 "Could not set ep conn binding\n"); 3785 } 3786 break; 3787 case ISCSI_UEVENT_START_CONN: 3788 ev->r.retcode = transport->start_conn(conn); 3789 if (!ev->r.retcode) 3790 WRITE_ONCE(conn->state, ISCSI_CONN_UP); 3791 3792 break; 3793 case ISCSI_UEVENT_SEND_PDU: 3794 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev); 3795 3796 if ((ev->u.send_pdu.hdr_size > pdu_len) || 3797 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) { 3798 err = -EINVAL; 3799 break; 3800 } 3801 3802 ev->r.retcode = transport->send_pdu(conn, 3803 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)), 3804 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3805 ev->u.send_pdu.data_size); 3806 break; 3807 default: 3808 err = -ENOSYS; 3809 } 3810 3811 mutex_unlock(&conn->ep_mutex); 3812 return err; 3813 } 3814 3815 static int 3816 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3817 { 3818 int err = 0; 3819 u32 portid; 3820 struct iscsi_uevent *ev = nlmsg_data(nlh); 3821 struct iscsi_transport *transport = NULL; 3822 struct iscsi_internal *priv; 3823 struct iscsi_cls_session *session; 3824 struct iscsi_endpoint *ep = NULL; 3825 3826 if (!netlink_capable(skb, CAP_SYS_ADMIN)) 3827 return -EPERM; 3828 3829 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3830 *group = ISCSI_NL_GRP_UIP; 3831 else 3832 *group = ISCSI_NL_GRP_ISCSID; 3833 3834 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3835 if (!priv) 3836 return -EINVAL; 3837 transport = priv->iscsi_transport; 3838 3839 if (!try_module_get(transport->owner)) 3840 return -EINVAL; 3841 3842 portid = NETLINK_CB(skb).portid; 3843 3844 switch (nlh->nlmsg_type) { 3845 case ISCSI_UEVENT_CREATE_SESSION: 3846 err = iscsi_if_create_session(priv, ep, ev, 3847 portid, 3848 ev->u.c_session.initial_cmdsn, 3849 ev->u.c_session.cmds_max, 3850 ev->u.c_session.queue_depth); 3851 break; 3852 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3853 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3854 if (!ep) { 3855 err = -EINVAL; 3856 break; 3857 } 3858 3859 err = iscsi_if_create_session(priv, ep, ev, 3860 portid, 3861 ev->u.c_bound_session.initial_cmdsn, 3862 ev->u.c_bound_session.cmds_max, 3863 ev->u.c_bound_session.queue_depth); 3864 iscsi_put_endpoint(ep); 3865 break; 3866 case ISCSI_UEVENT_DESTROY_SESSION: 3867 session = iscsi_session_lookup(ev->u.d_session.sid); 3868 if (!session) 3869 err = -EINVAL; 3870 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3871 err = -EBUSY; 3872 else 3873 transport->destroy_session(session); 3874 break; 3875 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3876 session = iscsi_session_lookup(ev->u.d_session.sid); 3877 if (!session) 3878 err = -EINVAL; 3879 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3880 err = -EBUSY; 3881 else { 3882 unsigned long flags; 3883 3884 /* Prevent this session from being found again */ 3885 spin_lock_irqsave(&sesslock, flags); 3886 list_del_init(&session->sess_list); 3887 spin_unlock_irqrestore(&sesslock, flags); 3888 3889 queue_work(system_unbound_wq, &session->destroy_work); 3890 } 3891 break; 3892 case ISCSI_UEVENT_UNBIND_SESSION: 3893 session = iscsi_session_lookup(ev->u.d_session.sid); 3894 if (session) 3895 queue_work(session->workq, &session->unbind_work); 3896 else 3897 err = -EINVAL; 3898 break; 3899 case ISCSI_UEVENT_SET_PARAM: 3900 err = iscsi_set_param(transport, ev); 3901 break; 3902 case ISCSI_UEVENT_CREATE_CONN: 3903 case ISCSI_UEVENT_DESTROY_CONN: 3904 case ISCSI_UEVENT_STOP_CONN: 3905 case ISCSI_UEVENT_START_CONN: 3906 case ISCSI_UEVENT_BIND_CONN: 3907 case ISCSI_UEVENT_SEND_PDU: 3908 err = iscsi_if_transport_conn(transport, nlh); 3909 break; 3910 case ISCSI_UEVENT_GET_STATS: 3911 err = iscsi_if_get_stats(transport, nlh); 3912 break; 3913 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3914 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3915 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3916 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3917 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3918 break; 3919 case ISCSI_UEVENT_TGT_DSCVR: 3920 err = iscsi_tgt_dscvr(transport, ev); 3921 break; 3922 case ISCSI_UEVENT_SET_HOST_PARAM: 3923 err = iscsi_set_host_param(transport, ev); 3924 break; 3925 case ISCSI_UEVENT_PATH_UPDATE: 3926 err = iscsi_set_path(transport, ev); 3927 break; 3928 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3929 err = iscsi_set_iface_params(transport, ev, 3930 nlmsg_attrlen(nlh, sizeof(*ev))); 3931 break; 3932 case ISCSI_UEVENT_PING: 3933 err = iscsi_send_ping(transport, ev); 3934 break; 3935 case ISCSI_UEVENT_GET_CHAP: 3936 err = iscsi_get_chap(transport, nlh); 3937 break; 3938 case ISCSI_UEVENT_DELETE_CHAP: 3939 err = iscsi_delete_chap(transport, ev); 3940 break; 3941 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3942 err = iscsi_set_flashnode_param(transport, ev, 3943 nlmsg_attrlen(nlh, 3944 sizeof(*ev))); 3945 break; 3946 case ISCSI_UEVENT_NEW_FLASHNODE: 3947 err = iscsi_new_flashnode(transport, ev, 3948 nlmsg_attrlen(nlh, sizeof(*ev))); 3949 break; 3950 case ISCSI_UEVENT_DEL_FLASHNODE: 3951 err = iscsi_del_flashnode(transport, ev); 3952 break; 3953 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3954 err = iscsi_login_flashnode(transport, ev); 3955 break; 3956 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3957 err = iscsi_logout_flashnode(transport, ev); 3958 break; 3959 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3960 err = iscsi_logout_flashnode_sid(transport, ev); 3961 break; 3962 case ISCSI_UEVENT_SET_CHAP: 3963 err = iscsi_set_chap(transport, ev, 3964 nlmsg_attrlen(nlh, sizeof(*ev))); 3965 break; 3966 case ISCSI_UEVENT_GET_HOST_STATS: 3967 err = iscsi_get_host_stats(transport, nlh); 3968 break; 3969 default: 3970 err = -ENOSYS; 3971 break; 3972 } 3973 3974 module_put(transport->owner); 3975 return err; 3976 } 3977 3978 /* 3979 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3980 * Malformed skbs with wrong lengths or invalid creds are not processed. 3981 */ 3982 static void 3983 iscsi_if_rx(struct sk_buff *skb) 3984 { 3985 u32 portid = NETLINK_CB(skb).portid; 3986 3987 mutex_lock(&rx_queue_mutex); 3988 while (skb->len >= NLMSG_HDRLEN) { 3989 int err; 3990 uint32_t rlen; 3991 struct nlmsghdr *nlh; 3992 struct iscsi_uevent *ev; 3993 uint32_t group; 3994 int retries = ISCSI_SEND_MAX_ALLOWED; 3995 3996 nlh = nlmsg_hdr(skb); 3997 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3998 skb->len < nlh->nlmsg_len) { 3999 break; 4000 } 4001 4002 ev = nlmsg_data(nlh); 4003 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 4004 if (rlen > skb->len) 4005 rlen = skb->len; 4006 4007 err = iscsi_if_recv_msg(skb, nlh, &group); 4008 if (err) { 4009 ev->type = ISCSI_KEVENT_IF_ERROR; 4010 ev->iferror = err; 4011 } 4012 do { 4013 /* 4014 * special case for GET_STATS: 4015 * on success - sending reply and stats from 4016 * inside of if_recv_msg(), 4017 * on error - fall through. 4018 */ 4019 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 4020 break; 4021 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 4022 break; 4023 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 4024 ev, sizeof(*ev)); 4025 if (err == -EAGAIN && --retries < 0) { 4026 printk(KERN_WARNING "Send reply failed, error %d\n", err); 4027 break; 4028 } 4029 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 4030 skb_pull(skb, rlen); 4031 } 4032 mutex_unlock(&rx_queue_mutex); 4033 } 4034 4035 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 4036 struct device_attribute dev_attr_##_prefix##_##_name = \ 4037 __ATTR(_name,_mode,_show,_store) 4038 4039 /* 4040 * iSCSI connection attrs 4041 */ 4042 #define iscsi_conn_attr_show(param) \ 4043 static ssize_t \ 4044 show_conn_param_##param(struct device *dev, \ 4045 struct device_attribute *attr, char *buf) \ 4046 { \ 4047 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4048 struct iscsi_transport *t = conn->transport; \ 4049 return t->get_conn_param(conn, param, buf); \ 4050 } 4051 4052 #define iscsi_conn_attr(field, param) \ 4053 iscsi_conn_attr_show(param) \ 4054 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 4055 NULL); 4056 4057 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 4058 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 4059 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 4060 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 4061 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 4062 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 4063 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 4064 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 4065 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 4066 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 4067 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 4068 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 4069 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 4070 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 4071 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 4072 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 4073 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 4074 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 4075 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 4076 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 4077 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 4078 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 4079 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 4080 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 4081 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 4082 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 4083 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 4084 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 4085 4086 static const char *const connection_state_names[] = { 4087 [ISCSI_CONN_UP] = "up", 4088 [ISCSI_CONN_DOWN] = "down", 4089 [ISCSI_CONN_FAILED] = "failed", 4090 [ISCSI_CONN_BOUND] = "bound" 4091 }; 4092 4093 static ssize_t show_conn_state(struct device *dev, 4094 struct device_attribute *attr, char *buf) 4095 { 4096 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 4097 const char *state = "unknown"; 4098 int conn_state = READ_ONCE(conn->state); 4099 4100 if (conn_state >= 0 && 4101 conn_state < ARRAY_SIZE(connection_state_names)) 4102 state = connection_state_names[conn_state]; 4103 4104 return sysfs_emit(buf, "%s\n", state); 4105 } 4106 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 4107 NULL); 4108 4109 #define iscsi_conn_ep_attr_show(param) \ 4110 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 4111 struct device_attribute *attr,\ 4112 char *buf) \ 4113 { \ 4114 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4115 struct iscsi_transport *t = conn->transport; \ 4116 struct iscsi_endpoint *ep; \ 4117 ssize_t rc; \ 4118 \ 4119 /* \ 4120 * Need to make sure ep_disconnect does not free the LLD's \ 4121 * interconnect resources while we are trying to read them. \ 4122 */ \ 4123 mutex_lock(&conn->ep_mutex); \ 4124 ep = conn->ep; \ 4125 if (!ep && t->ep_connect) { \ 4126 mutex_unlock(&conn->ep_mutex); \ 4127 return -ENOTCONN; \ 4128 } \ 4129 \ 4130 if (ep) \ 4131 rc = t->get_ep_param(ep, param, buf); \ 4132 else \ 4133 rc = t->get_conn_param(conn, param, buf); \ 4134 mutex_unlock(&conn->ep_mutex); \ 4135 return rc; \ 4136 } 4137 4138 #define iscsi_conn_ep_attr(field, param) \ 4139 iscsi_conn_ep_attr_show(param) \ 4140 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4141 show_conn_ep_param_##param, NULL); 4142 4143 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4144 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4145 4146 static struct attribute *iscsi_conn_attrs[] = { 4147 &dev_attr_conn_max_recv_dlength.attr, 4148 &dev_attr_conn_max_xmit_dlength.attr, 4149 &dev_attr_conn_header_digest.attr, 4150 &dev_attr_conn_data_digest.attr, 4151 &dev_attr_conn_ifmarker.attr, 4152 &dev_attr_conn_ofmarker.attr, 4153 &dev_attr_conn_address.attr, 4154 &dev_attr_conn_port.attr, 4155 &dev_attr_conn_exp_statsn.attr, 4156 &dev_attr_conn_persistent_address.attr, 4157 &dev_attr_conn_persistent_port.attr, 4158 &dev_attr_conn_ping_tmo.attr, 4159 &dev_attr_conn_recv_tmo.attr, 4160 &dev_attr_conn_local_port.attr, 4161 &dev_attr_conn_statsn.attr, 4162 &dev_attr_conn_keepalive_tmo.attr, 4163 &dev_attr_conn_max_segment_size.attr, 4164 &dev_attr_conn_tcp_timestamp_stat.attr, 4165 &dev_attr_conn_tcp_wsf_disable.attr, 4166 &dev_attr_conn_tcp_nagle_disable.attr, 4167 &dev_attr_conn_tcp_timer_scale.attr, 4168 &dev_attr_conn_tcp_timestamp_enable.attr, 4169 &dev_attr_conn_fragment_disable.attr, 4170 &dev_attr_conn_ipv4_tos.attr, 4171 &dev_attr_conn_ipv6_traffic_class.attr, 4172 &dev_attr_conn_ipv6_flow_label.attr, 4173 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4174 &dev_attr_conn_tcp_xmit_wsf.attr, 4175 &dev_attr_conn_tcp_recv_wsf.attr, 4176 &dev_attr_conn_local_ipaddr.attr, 4177 &dev_attr_conn_state.attr, 4178 NULL, 4179 }; 4180 4181 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4182 struct attribute *attr, int i) 4183 { 4184 struct device *cdev = container_of(kobj, struct device, kobj); 4185 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4186 struct iscsi_transport *t = conn->transport; 4187 int param; 4188 4189 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4190 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4191 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4192 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4193 else if (attr == &dev_attr_conn_header_digest.attr) 4194 param = ISCSI_PARAM_HDRDGST_EN; 4195 else if (attr == &dev_attr_conn_data_digest.attr) 4196 param = ISCSI_PARAM_DATADGST_EN; 4197 else if (attr == &dev_attr_conn_ifmarker.attr) 4198 param = ISCSI_PARAM_IFMARKER_EN; 4199 else if (attr == &dev_attr_conn_ofmarker.attr) 4200 param = ISCSI_PARAM_OFMARKER_EN; 4201 else if (attr == &dev_attr_conn_address.attr) 4202 param = ISCSI_PARAM_CONN_ADDRESS; 4203 else if (attr == &dev_attr_conn_port.attr) 4204 param = ISCSI_PARAM_CONN_PORT; 4205 else if (attr == &dev_attr_conn_exp_statsn.attr) 4206 param = ISCSI_PARAM_EXP_STATSN; 4207 else if (attr == &dev_attr_conn_persistent_address.attr) 4208 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4209 else if (attr == &dev_attr_conn_persistent_port.attr) 4210 param = ISCSI_PARAM_PERSISTENT_PORT; 4211 else if (attr == &dev_attr_conn_ping_tmo.attr) 4212 param = ISCSI_PARAM_PING_TMO; 4213 else if (attr == &dev_attr_conn_recv_tmo.attr) 4214 param = ISCSI_PARAM_RECV_TMO; 4215 else if (attr == &dev_attr_conn_local_port.attr) 4216 param = ISCSI_PARAM_LOCAL_PORT; 4217 else if (attr == &dev_attr_conn_statsn.attr) 4218 param = ISCSI_PARAM_STATSN; 4219 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4220 param = ISCSI_PARAM_KEEPALIVE_TMO; 4221 else if (attr == &dev_attr_conn_max_segment_size.attr) 4222 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4223 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4224 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4225 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4226 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4227 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4228 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4229 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4230 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4231 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4232 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4233 else if (attr == &dev_attr_conn_fragment_disable.attr) 4234 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4235 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4236 param = ISCSI_PARAM_IPV4_TOS; 4237 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4238 param = ISCSI_PARAM_IPV6_TC; 4239 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4240 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4241 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4242 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4243 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4244 param = ISCSI_PARAM_TCP_XMIT_WSF; 4245 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4246 param = ISCSI_PARAM_TCP_RECV_WSF; 4247 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4248 param = ISCSI_PARAM_LOCAL_IPADDR; 4249 else if (attr == &dev_attr_conn_state.attr) 4250 return S_IRUGO; 4251 else { 4252 WARN_ONCE(1, "Invalid conn attr"); 4253 return 0; 4254 } 4255 4256 return t->attr_is_visible(ISCSI_PARAM, param); 4257 } 4258 4259 static struct attribute_group iscsi_conn_group = { 4260 .attrs = iscsi_conn_attrs, 4261 .is_visible = iscsi_conn_attr_is_visible, 4262 }; 4263 4264 /* 4265 * iSCSI session attrs 4266 */ 4267 #define iscsi_session_attr_show(param, perm) \ 4268 static ssize_t \ 4269 show_session_param_##param(struct device *dev, \ 4270 struct device_attribute *attr, char *buf) \ 4271 { \ 4272 struct iscsi_cls_session *session = \ 4273 iscsi_dev_to_session(dev->parent); \ 4274 struct iscsi_transport *t = session->transport; \ 4275 \ 4276 if (perm && !capable(CAP_SYS_ADMIN)) \ 4277 return -EACCES; \ 4278 return t->get_session_param(session, param, buf); \ 4279 } 4280 4281 #define iscsi_session_attr(field, param, perm) \ 4282 iscsi_session_attr_show(param, perm) \ 4283 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4284 NULL); 4285 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4286 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4287 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4288 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4289 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4290 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4291 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4292 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4293 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4294 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4295 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4296 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4297 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4298 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4299 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4300 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4301 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4302 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4303 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4304 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4305 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4306 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4307 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4308 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4309 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4310 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4311 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4312 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4313 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4314 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4315 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4316 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4317 iscsi_session_attr(discovery_auth_optional, 4318 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4319 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4320 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4321 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4322 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4323 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4324 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4325 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4326 4327 static ssize_t 4328 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4329 char *buf) 4330 { 4331 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4332 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state)); 4333 } 4334 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4335 NULL); 4336 static ssize_t 4337 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4338 char *buf) 4339 { 4340 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4341 return sysfs_emit(buf, "%d\n", session->creator); 4342 } 4343 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4344 NULL); 4345 static ssize_t 4346 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4347 char *buf) 4348 { 4349 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4350 return sysfs_emit(buf, "%d\n", session->target_id); 4351 } 4352 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4353 show_priv_session_target_id, NULL); 4354 4355 #define iscsi_priv_session_attr_show(field, format) \ 4356 static ssize_t \ 4357 show_priv_session_##field(struct device *dev, \ 4358 struct device_attribute *attr, char *buf) \ 4359 { \ 4360 struct iscsi_cls_session *session = \ 4361 iscsi_dev_to_session(dev->parent); \ 4362 if (session->field == -1) \ 4363 return sysfs_emit(buf, "off\n"); \ 4364 return sysfs_emit(buf, format"\n", session->field); \ 4365 } 4366 4367 #define iscsi_priv_session_attr_store(field) \ 4368 static ssize_t \ 4369 store_priv_session_##field(struct device *dev, \ 4370 struct device_attribute *attr, \ 4371 const char *buf, size_t count) \ 4372 { \ 4373 int val; \ 4374 char *cp; \ 4375 struct iscsi_cls_session *session = \ 4376 iscsi_dev_to_session(dev->parent); \ 4377 if ((session->state == ISCSI_SESSION_FREE) || \ 4378 (session->state == ISCSI_SESSION_FAILED)) \ 4379 return -EBUSY; \ 4380 if (strncmp(buf, "off", 3) == 0) { \ 4381 session->field = -1; \ 4382 session->field##_sysfs_override = true; \ 4383 } else { \ 4384 val = simple_strtoul(buf, &cp, 0); \ 4385 if (*cp != '\0' && *cp != '\n') \ 4386 return -EINVAL; \ 4387 session->field = val; \ 4388 session->field##_sysfs_override = true; \ 4389 } \ 4390 return count; \ 4391 } 4392 4393 #define iscsi_priv_session_rw_attr(field, format) \ 4394 iscsi_priv_session_attr_show(field, format) \ 4395 iscsi_priv_session_attr_store(field) \ 4396 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4397 show_priv_session_##field, \ 4398 store_priv_session_##field) 4399 4400 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4401 4402 static struct attribute *iscsi_session_attrs[] = { 4403 &dev_attr_sess_initial_r2t.attr, 4404 &dev_attr_sess_max_outstanding_r2t.attr, 4405 &dev_attr_sess_immediate_data.attr, 4406 &dev_attr_sess_first_burst_len.attr, 4407 &dev_attr_sess_max_burst_len.attr, 4408 &dev_attr_sess_data_pdu_in_order.attr, 4409 &dev_attr_sess_data_seq_in_order.attr, 4410 &dev_attr_sess_erl.attr, 4411 &dev_attr_sess_targetname.attr, 4412 &dev_attr_sess_tpgt.attr, 4413 &dev_attr_sess_password.attr, 4414 &dev_attr_sess_password_in.attr, 4415 &dev_attr_sess_username.attr, 4416 &dev_attr_sess_username_in.attr, 4417 &dev_attr_sess_fast_abort.attr, 4418 &dev_attr_sess_abort_tmo.attr, 4419 &dev_attr_sess_lu_reset_tmo.attr, 4420 &dev_attr_sess_tgt_reset_tmo.attr, 4421 &dev_attr_sess_ifacename.attr, 4422 &dev_attr_sess_initiatorname.attr, 4423 &dev_attr_sess_targetalias.attr, 4424 &dev_attr_sess_boot_root.attr, 4425 &dev_attr_sess_boot_nic.attr, 4426 &dev_attr_sess_boot_target.attr, 4427 &dev_attr_priv_sess_recovery_tmo.attr, 4428 &dev_attr_priv_sess_state.attr, 4429 &dev_attr_priv_sess_creator.attr, 4430 &dev_attr_sess_chap_out_idx.attr, 4431 &dev_attr_sess_chap_in_idx.attr, 4432 &dev_attr_priv_sess_target_id.attr, 4433 &dev_attr_sess_auto_snd_tgt_disable.attr, 4434 &dev_attr_sess_discovery_session.attr, 4435 &dev_attr_sess_portal_type.attr, 4436 &dev_attr_sess_chap_auth.attr, 4437 &dev_attr_sess_discovery_logout.attr, 4438 &dev_attr_sess_bidi_chap.attr, 4439 &dev_attr_sess_discovery_auth_optional.attr, 4440 &dev_attr_sess_def_time2wait.attr, 4441 &dev_attr_sess_def_time2retain.attr, 4442 &dev_attr_sess_isid.attr, 4443 &dev_attr_sess_tsid.attr, 4444 &dev_attr_sess_def_taskmgmt_tmo.attr, 4445 &dev_attr_sess_discovery_parent_idx.attr, 4446 &dev_attr_sess_discovery_parent_type.attr, 4447 NULL, 4448 }; 4449 4450 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4451 struct attribute *attr, int i) 4452 { 4453 struct device *cdev = container_of(kobj, struct device, kobj); 4454 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4455 struct iscsi_transport *t = session->transport; 4456 int param; 4457 4458 if (attr == &dev_attr_sess_initial_r2t.attr) 4459 param = ISCSI_PARAM_INITIAL_R2T_EN; 4460 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4461 param = ISCSI_PARAM_MAX_R2T; 4462 else if (attr == &dev_attr_sess_immediate_data.attr) 4463 param = ISCSI_PARAM_IMM_DATA_EN; 4464 else if (attr == &dev_attr_sess_first_burst_len.attr) 4465 param = ISCSI_PARAM_FIRST_BURST; 4466 else if (attr == &dev_attr_sess_max_burst_len.attr) 4467 param = ISCSI_PARAM_MAX_BURST; 4468 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4469 param = ISCSI_PARAM_PDU_INORDER_EN; 4470 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4471 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4472 else if (attr == &dev_attr_sess_erl.attr) 4473 param = ISCSI_PARAM_ERL; 4474 else if (attr == &dev_attr_sess_targetname.attr) 4475 param = ISCSI_PARAM_TARGET_NAME; 4476 else if (attr == &dev_attr_sess_tpgt.attr) 4477 param = ISCSI_PARAM_TPGT; 4478 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4479 param = ISCSI_PARAM_CHAP_IN_IDX; 4480 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4481 param = ISCSI_PARAM_CHAP_OUT_IDX; 4482 else if (attr == &dev_attr_sess_password.attr) 4483 param = ISCSI_PARAM_USERNAME; 4484 else if (attr == &dev_attr_sess_password_in.attr) 4485 param = ISCSI_PARAM_USERNAME_IN; 4486 else if (attr == &dev_attr_sess_username.attr) 4487 param = ISCSI_PARAM_PASSWORD; 4488 else if (attr == &dev_attr_sess_username_in.attr) 4489 param = ISCSI_PARAM_PASSWORD_IN; 4490 else if (attr == &dev_attr_sess_fast_abort.attr) 4491 param = ISCSI_PARAM_FAST_ABORT; 4492 else if (attr == &dev_attr_sess_abort_tmo.attr) 4493 param = ISCSI_PARAM_ABORT_TMO; 4494 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4495 param = ISCSI_PARAM_LU_RESET_TMO; 4496 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4497 param = ISCSI_PARAM_TGT_RESET_TMO; 4498 else if (attr == &dev_attr_sess_ifacename.attr) 4499 param = ISCSI_PARAM_IFACE_NAME; 4500 else if (attr == &dev_attr_sess_initiatorname.attr) 4501 param = ISCSI_PARAM_INITIATOR_NAME; 4502 else if (attr == &dev_attr_sess_targetalias.attr) 4503 param = ISCSI_PARAM_TARGET_ALIAS; 4504 else if (attr == &dev_attr_sess_boot_root.attr) 4505 param = ISCSI_PARAM_BOOT_ROOT; 4506 else if (attr == &dev_attr_sess_boot_nic.attr) 4507 param = ISCSI_PARAM_BOOT_NIC; 4508 else if (attr == &dev_attr_sess_boot_target.attr) 4509 param = ISCSI_PARAM_BOOT_TARGET; 4510 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4511 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4512 else if (attr == &dev_attr_sess_discovery_session.attr) 4513 param = ISCSI_PARAM_DISCOVERY_SESS; 4514 else if (attr == &dev_attr_sess_portal_type.attr) 4515 param = ISCSI_PARAM_PORTAL_TYPE; 4516 else if (attr == &dev_attr_sess_chap_auth.attr) 4517 param = ISCSI_PARAM_CHAP_AUTH_EN; 4518 else if (attr == &dev_attr_sess_discovery_logout.attr) 4519 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4520 else if (attr == &dev_attr_sess_bidi_chap.attr) 4521 param = ISCSI_PARAM_BIDI_CHAP_EN; 4522 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4523 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4524 else if (attr == &dev_attr_sess_def_time2wait.attr) 4525 param = ISCSI_PARAM_DEF_TIME2WAIT; 4526 else if (attr == &dev_attr_sess_def_time2retain.attr) 4527 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4528 else if (attr == &dev_attr_sess_isid.attr) 4529 param = ISCSI_PARAM_ISID; 4530 else if (attr == &dev_attr_sess_tsid.attr) 4531 param = ISCSI_PARAM_TSID; 4532 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4533 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4534 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4535 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4536 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4537 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4538 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4539 return S_IRUGO | S_IWUSR; 4540 else if (attr == &dev_attr_priv_sess_state.attr) 4541 return S_IRUGO; 4542 else if (attr == &dev_attr_priv_sess_creator.attr) 4543 return S_IRUGO; 4544 else if (attr == &dev_attr_priv_sess_target_id.attr) 4545 return S_IRUGO; 4546 else { 4547 WARN_ONCE(1, "Invalid session attr"); 4548 return 0; 4549 } 4550 4551 return t->attr_is_visible(ISCSI_PARAM, param); 4552 } 4553 4554 static struct attribute_group iscsi_session_group = { 4555 .attrs = iscsi_session_attrs, 4556 .is_visible = iscsi_session_attr_is_visible, 4557 }; 4558 4559 /* 4560 * iSCSI host attrs 4561 */ 4562 #define iscsi_host_attr_show(param) \ 4563 static ssize_t \ 4564 show_host_param_##param(struct device *dev, \ 4565 struct device_attribute *attr, char *buf) \ 4566 { \ 4567 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4568 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4569 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4570 } 4571 4572 #define iscsi_host_attr(field, param) \ 4573 iscsi_host_attr_show(param) \ 4574 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4575 NULL); 4576 4577 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4578 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4579 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4580 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4581 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4582 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4583 4584 static struct attribute *iscsi_host_attrs[] = { 4585 &dev_attr_host_netdev.attr, 4586 &dev_attr_host_hwaddress.attr, 4587 &dev_attr_host_ipaddress.attr, 4588 &dev_attr_host_initiatorname.attr, 4589 &dev_attr_host_port_state.attr, 4590 &dev_attr_host_port_speed.attr, 4591 NULL, 4592 }; 4593 4594 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4595 struct attribute *attr, int i) 4596 { 4597 struct device *cdev = container_of(kobj, struct device, kobj); 4598 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4599 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4600 int param; 4601 4602 if (attr == &dev_attr_host_netdev.attr) 4603 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4604 else if (attr == &dev_attr_host_hwaddress.attr) 4605 param = ISCSI_HOST_PARAM_HWADDRESS; 4606 else if (attr == &dev_attr_host_ipaddress.attr) 4607 param = ISCSI_HOST_PARAM_IPADDRESS; 4608 else if (attr == &dev_attr_host_initiatorname.attr) 4609 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4610 else if (attr == &dev_attr_host_port_state.attr) 4611 param = ISCSI_HOST_PARAM_PORT_STATE; 4612 else if (attr == &dev_attr_host_port_speed.attr) 4613 param = ISCSI_HOST_PARAM_PORT_SPEED; 4614 else { 4615 WARN_ONCE(1, "Invalid host attr"); 4616 return 0; 4617 } 4618 4619 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4620 } 4621 4622 static struct attribute_group iscsi_host_group = { 4623 .attrs = iscsi_host_attrs, 4624 .is_visible = iscsi_host_attr_is_visible, 4625 }; 4626 4627 /* convert iscsi_port_speed values to ascii string name */ 4628 static const struct { 4629 enum iscsi_port_speed value; 4630 char *name; 4631 } iscsi_port_speed_names[] = { 4632 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4633 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4634 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4635 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4636 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4637 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4638 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4639 }; 4640 4641 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4642 { 4643 int i; 4644 char *speed = "Unknown!"; 4645 struct iscsi_cls_host *ihost = shost->shost_data; 4646 uint32_t port_speed = ihost->port_speed; 4647 4648 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4649 if (iscsi_port_speed_names[i].value & port_speed) { 4650 speed = iscsi_port_speed_names[i].name; 4651 break; 4652 } 4653 } 4654 return speed; 4655 } 4656 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4657 4658 /* convert iscsi_port_state values to ascii string name */ 4659 static const struct { 4660 enum iscsi_port_state value; 4661 char *name; 4662 } iscsi_port_state_names[] = { 4663 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4664 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4665 }; 4666 4667 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4668 { 4669 int i; 4670 char *state = "Unknown!"; 4671 struct iscsi_cls_host *ihost = shost->shost_data; 4672 uint32_t port_state = ihost->port_state; 4673 4674 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4675 if (iscsi_port_state_names[i].value & port_state) { 4676 state = iscsi_port_state_names[i].name; 4677 break; 4678 } 4679 } 4680 return state; 4681 } 4682 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4683 4684 static int iscsi_session_match(struct attribute_container *cont, 4685 struct device *dev) 4686 { 4687 struct iscsi_cls_session *session; 4688 struct Scsi_Host *shost; 4689 struct iscsi_internal *priv; 4690 4691 if (!iscsi_is_session_dev(dev)) 4692 return 0; 4693 4694 session = iscsi_dev_to_session(dev); 4695 shost = iscsi_session_to_shost(session); 4696 if (!shost->transportt) 4697 return 0; 4698 4699 priv = to_iscsi_internal(shost->transportt); 4700 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4701 return 0; 4702 4703 return &priv->session_cont.ac == cont; 4704 } 4705 4706 static int iscsi_conn_match(struct attribute_container *cont, 4707 struct device *dev) 4708 { 4709 struct iscsi_cls_session *session; 4710 struct iscsi_cls_conn *conn; 4711 struct Scsi_Host *shost; 4712 struct iscsi_internal *priv; 4713 4714 if (!iscsi_is_conn_dev(dev)) 4715 return 0; 4716 4717 conn = iscsi_dev_to_conn(dev); 4718 session = iscsi_dev_to_session(conn->dev.parent); 4719 shost = iscsi_session_to_shost(session); 4720 4721 if (!shost->transportt) 4722 return 0; 4723 4724 priv = to_iscsi_internal(shost->transportt); 4725 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4726 return 0; 4727 4728 return &priv->conn_cont.ac == cont; 4729 } 4730 4731 static int iscsi_host_match(struct attribute_container *cont, 4732 struct device *dev) 4733 { 4734 struct Scsi_Host *shost; 4735 struct iscsi_internal *priv; 4736 4737 if (!scsi_is_host_device(dev)) 4738 return 0; 4739 4740 shost = dev_to_shost(dev); 4741 if (!shost->transportt || 4742 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4743 return 0; 4744 4745 priv = to_iscsi_internal(shost->transportt); 4746 return &priv->t.host_attrs.ac == cont; 4747 } 4748 4749 struct scsi_transport_template * 4750 iscsi_register_transport(struct iscsi_transport *tt) 4751 { 4752 struct iscsi_internal *priv; 4753 unsigned long flags; 4754 int err; 4755 4756 BUG_ON(!tt); 4757 WARN_ON(tt->ep_disconnect && !tt->unbind_conn); 4758 4759 priv = iscsi_if_transport_lookup(tt); 4760 if (priv) 4761 return NULL; 4762 4763 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4764 if (!priv) 4765 return NULL; 4766 INIT_LIST_HEAD(&priv->list); 4767 priv->iscsi_transport = tt; 4768 priv->t.user_scan = iscsi_user_scan; 4769 4770 priv->dev.class = &iscsi_transport_class; 4771 dev_set_name(&priv->dev, "%s", tt->name); 4772 err = device_register(&priv->dev); 4773 if (err) 4774 goto free_priv; 4775 4776 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4777 if (err) 4778 goto unregister_dev; 4779 4780 /* host parameters */ 4781 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4782 priv->t.host_attrs.ac.match = iscsi_host_match; 4783 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4784 priv->t.host_size = sizeof(struct iscsi_cls_host); 4785 transport_container_register(&priv->t.host_attrs); 4786 4787 /* connection parameters */ 4788 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4789 priv->conn_cont.ac.match = iscsi_conn_match; 4790 priv->conn_cont.ac.grp = &iscsi_conn_group; 4791 transport_container_register(&priv->conn_cont); 4792 4793 /* session parameters */ 4794 priv->session_cont.ac.class = &iscsi_session_class.class; 4795 priv->session_cont.ac.match = iscsi_session_match; 4796 priv->session_cont.ac.grp = &iscsi_session_group; 4797 transport_container_register(&priv->session_cont); 4798 4799 spin_lock_irqsave(&iscsi_transport_lock, flags); 4800 list_add(&priv->list, &iscsi_transports); 4801 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4802 4803 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4804 return &priv->t; 4805 4806 unregister_dev: 4807 device_unregister(&priv->dev); 4808 return NULL; 4809 free_priv: 4810 kfree(priv); 4811 return NULL; 4812 } 4813 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4814 4815 int iscsi_unregister_transport(struct iscsi_transport *tt) 4816 { 4817 struct iscsi_internal *priv; 4818 unsigned long flags; 4819 4820 BUG_ON(!tt); 4821 4822 mutex_lock(&rx_queue_mutex); 4823 4824 priv = iscsi_if_transport_lookup(tt); 4825 BUG_ON (!priv); 4826 4827 spin_lock_irqsave(&iscsi_transport_lock, flags); 4828 list_del(&priv->list); 4829 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4830 4831 transport_container_unregister(&priv->conn_cont); 4832 transport_container_unregister(&priv->session_cont); 4833 transport_container_unregister(&priv->t.host_attrs); 4834 4835 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4836 device_unregister(&priv->dev); 4837 mutex_unlock(&rx_queue_mutex); 4838 4839 return 0; 4840 } 4841 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4842 4843 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4844 struct device *dev, const char *fmt, ...) 4845 { 4846 struct va_format vaf; 4847 va_list args; 4848 4849 va_start(args, fmt); 4850 vaf.fmt = fmt; 4851 vaf.va = &args; 4852 trace(dev, &vaf); 4853 va_end(args); 4854 } 4855 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4856 4857 static __init int iscsi_transport_init(void) 4858 { 4859 int err; 4860 struct netlink_kernel_cfg cfg = { 4861 .groups = 1, 4862 .input = iscsi_if_rx, 4863 }; 4864 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4865 ISCSI_TRANSPORT_VERSION); 4866 4867 atomic_set(&iscsi_session_nr, 0); 4868 4869 err = class_register(&iscsi_transport_class); 4870 if (err) 4871 return err; 4872 4873 err = class_register(&iscsi_endpoint_class); 4874 if (err) 4875 goto unregister_transport_class; 4876 4877 err = class_register(&iscsi_iface_class); 4878 if (err) 4879 goto unregister_endpoint_class; 4880 4881 err = transport_class_register(&iscsi_host_class); 4882 if (err) 4883 goto unregister_iface_class; 4884 4885 err = transport_class_register(&iscsi_connection_class); 4886 if (err) 4887 goto unregister_host_class; 4888 4889 err = transport_class_register(&iscsi_session_class); 4890 if (err) 4891 goto unregister_conn_class; 4892 4893 err = bus_register(&iscsi_flashnode_bus); 4894 if (err) 4895 goto unregister_session_class; 4896 4897 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4898 if (!nls) { 4899 err = -ENOBUFS; 4900 goto unregister_flashnode_bus; 4901 } 4902 4903 iscsi_conn_cleanup_workq = alloc_workqueue("%s", 4904 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 4905 "iscsi_conn_cleanup"); 4906 if (!iscsi_conn_cleanup_workq) { 4907 err = -ENOMEM; 4908 goto release_nls; 4909 } 4910 4911 return 0; 4912 4913 release_nls: 4914 netlink_kernel_release(nls); 4915 unregister_flashnode_bus: 4916 bus_unregister(&iscsi_flashnode_bus); 4917 unregister_session_class: 4918 transport_class_unregister(&iscsi_session_class); 4919 unregister_conn_class: 4920 transport_class_unregister(&iscsi_connection_class); 4921 unregister_host_class: 4922 transport_class_unregister(&iscsi_host_class); 4923 unregister_iface_class: 4924 class_unregister(&iscsi_iface_class); 4925 unregister_endpoint_class: 4926 class_unregister(&iscsi_endpoint_class); 4927 unregister_transport_class: 4928 class_unregister(&iscsi_transport_class); 4929 return err; 4930 } 4931 4932 static void __exit iscsi_transport_exit(void) 4933 { 4934 destroy_workqueue(iscsi_conn_cleanup_workq); 4935 netlink_kernel_release(nls); 4936 bus_unregister(&iscsi_flashnode_bus); 4937 transport_class_unregister(&iscsi_connection_class); 4938 transport_class_unregister(&iscsi_session_class); 4939 transport_class_unregister(&iscsi_host_class); 4940 class_unregister(&iscsi_endpoint_class); 4941 class_unregister(&iscsi_iface_class); 4942 class_unregister(&iscsi_transport_class); 4943 } 4944 4945 module_init(iscsi_transport_init); 4946 module_exit(iscsi_transport_exit); 4947 4948 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4949 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4950 "Alex Aizman <itn780@yahoo.com>"); 4951 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4952 MODULE_LICENSE("GPL"); 4953 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4954 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4955