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_free(&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_alloc(&iscsi_sess_ida, 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_free(&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 return 0; 2147 } 2148 2149 void iscsi_remove_session(struct iscsi_cls_session *session) 2150 { 2151 unsigned long flags; 2152 int err; 2153 2154 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2155 2156 spin_lock_irqsave(&sesslock, flags); 2157 if (!list_empty(&session->sess_list)) 2158 list_del(&session->sess_list); 2159 spin_unlock_irqrestore(&sesslock, flags); 2160 2161 if (!cancel_work_sync(&session->block_work)) 2162 cancel_delayed_work_sync(&session->recovery_work); 2163 cancel_work_sync(&session->unblock_work); 2164 /* 2165 * If we are blocked let commands flow again. The lld or iscsi 2166 * layer should set up the queuecommand to fail commands. 2167 * We assume that LLD will not be calling block/unblock while 2168 * removing the session. 2169 */ 2170 spin_lock_irqsave(&session->lock, flags); 2171 session->state = ISCSI_SESSION_FREE; 2172 spin_unlock_irqrestore(&session->lock, flags); 2173 2174 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2175 /* 2176 * qla4xxx can perform it's own scans when it runs in kernel only 2177 * mode. Make sure to flush those scans. 2178 */ 2179 flush_work(&session->scan_work); 2180 /* flush running unbind operations */ 2181 flush_work(&session->unbind_work); 2182 __iscsi_unbind_session(&session->unbind_work); 2183 2184 /* hw iscsi may not have removed all connections from session */ 2185 err = device_for_each_child(&session->dev, NULL, 2186 iscsi_iter_destroy_conn_fn); 2187 if (err) 2188 iscsi_cls_session_printk(KERN_ERR, session, 2189 "Could not delete all connections " 2190 "for session. Error %d.\n", err); 2191 2192 transport_unregister_device(&session->dev); 2193 2194 destroy_workqueue(session->workq); 2195 2196 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2197 device_del(&session->dev); 2198 } 2199 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2200 2201 static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag) 2202 { 2203 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n"); 2204 2205 switch (flag) { 2206 case STOP_CONN_RECOVER: 2207 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2208 break; 2209 case STOP_CONN_TERM: 2210 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2211 break; 2212 default: 2213 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n", 2214 flag); 2215 return; 2216 } 2217 2218 conn->transport->stop_conn(conn, flag); 2219 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n"); 2220 } 2221 2222 static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active) 2223 { 2224 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2225 struct iscsi_endpoint *ep; 2226 2227 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n"); 2228 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2229 2230 if (!conn->ep || !session->transport->ep_disconnect) 2231 return; 2232 2233 ep = conn->ep; 2234 conn->ep = NULL; 2235 2236 session->transport->unbind_conn(conn, is_active); 2237 session->transport->ep_disconnect(ep); 2238 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n"); 2239 } 2240 2241 static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn, 2242 struct iscsi_endpoint *ep, 2243 bool is_active) 2244 { 2245 /* Check if this was a conn error and the kernel took ownership */ 2246 spin_lock_irq(&conn->lock); 2247 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2248 spin_unlock_irq(&conn->lock); 2249 iscsi_ep_disconnect(conn, is_active); 2250 } else { 2251 spin_unlock_irq(&conn->lock); 2252 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n"); 2253 mutex_unlock(&conn->ep_mutex); 2254 2255 flush_work(&conn->cleanup_work); 2256 /* 2257 * Userspace is now done with the EP so we can release the ref 2258 * iscsi_cleanup_conn_work_fn took. 2259 */ 2260 iscsi_put_endpoint(ep); 2261 mutex_lock(&conn->ep_mutex); 2262 } 2263 } 2264 2265 static int iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2266 { 2267 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n"); 2268 /* 2269 * For offload, iscsid may not know about the ep like when iscsid is 2270 * restarted or for kernel based session shutdown iscsid is not even 2271 * up. For these cases, we do the disconnect now. 2272 */ 2273 mutex_lock(&conn->ep_mutex); 2274 if (conn->ep) 2275 iscsi_if_disconnect_bound_ep(conn, conn->ep, true); 2276 mutex_unlock(&conn->ep_mutex); 2277 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 * Figure out if it was the kernel or userspace initiating this. 2289 */ 2290 spin_lock_irq(&conn->lock); 2291 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2292 spin_unlock_irq(&conn->lock); 2293 iscsi_stop_conn(conn, flag); 2294 } else { 2295 spin_unlock_irq(&conn->lock); 2296 ISCSI_DBG_TRANS_CONN(conn, 2297 "flush kernel conn cleanup.\n"); 2298 flush_work(&conn->cleanup_work); 2299 } 2300 /* 2301 * Only clear for recovery to avoid extra cleanup runs during 2302 * termination. 2303 */ 2304 spin_lock_irq(&conn->lock); 2305 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags); 2306 spin_unlock_irq(&conn->lock); 2307 } 2308 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n"); 2309 return 0; 2310 } 2311 2312 static void iscsi_cleanup_conn_work_fn(struct work_struct *work) 2313 { 2314 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn, 2315 cleanup_work); 2316 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2317 2318 mutex_lock(&conn->ep_mutex); 2319 /* 2320 * Get a ref to the ep, so we don't release its ID until after 2321 * userspace is done referencing it in iscsi_if_disconnect_bound_ep. 2322 */ 2323 if (conn->ep) 2324 get_device(&conn->ep->dev); 2325 iscsi_ep_disconnect(conn, false); 2326 2327 if (system_state != SYSTEM_RUNNING) { 2328 /* 2329 * If the user has set up for the session to never timeout 2330 * then hang like they wanted. For all other cases fail right 2331 * away since userspace is not going to relogin. 2332 */ 2333 if (session->recovery_tmo > 0) 2334 session->recovery_tmo = 0; 2335 } 2336 2337 iscsi_stop_conn(conn, STOP_CONN_RECOVER); 2338 mutex_unlock(&conn->ep_mutex); 2339 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n"); 2340 } 2341 2342 static int iscsi_iter_force_destroy_conn_fn(struct device *dev, void *data) 2343 { 2344 struct iscsi_transport *transport; 2345 struct iscsi_cls_conn *conn; 2346 2347 if (!iscsi_is_conn_dev(dev)) 2348 return 0; 2349 2350 conn = iscsi_dev_to_conn(dev); 2351 transport = conn->transport; 2352 2353 if (READ_ONCE(conn->state) != ISCSI_CONN_DOWN) 2354 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2355 2356 transport->destroy_conn(conn); 2357 return 0; 2358 } 2359 2360 /** 2361 * iscsi_force_destroy_session - destroy a session from the kernel 2362 * @session: session to destroy 2363 * 2364 * Force the destruction of a session from the kernel. This should only be 2365 * used when userspace is no longer running during system shutdown. 2366 */ 2367 void iscsi_force_destroy_session(struct iscsi_cls_session *session) 2368 { 2369 struct iscsi_transport *transport = session->transport; 2370 unsigned long flags; 2371 2372 WARN_ON_ONCE(system_state == SYSTEM_RUNNING); 2373 2374 spin_lock_irqsave(&sesslock, flags); 2375 if (list_empty(&session->sess_list)) { 2376 spin_unlock_irqrestore(&sesslock, flags); 2377 /* 2378 * Conn/ep is already freed. Session is being torn down via 2379 * async path. For shutdown we don't care about it so return. 2380 */ 2381 return; 2382 } 2383 spin_unlock_irqrestore(&sesslock, flags); 2384 2385 device_for_each_child(&session->dev, NULL, 2386 iscsi_iter_force_destroy_conn_fn); 2387 transport->destroy_session(session); 2388 } 2389 EXPORT_SYMBOL_GPL(iscsi_force_destroy_session); 2390 2391 void iscsi_free_session(struct iscsi_cls_session *session) 2392 { 2393 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2394 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2395 put_device(&session->dev); 2396 } 2397 EXPORT_SYMBOL_GPL(iscsi_free_session); 2398 2399 /** 2400 * iscsi_alloc_conn - alloc iscsi class connection 2401 * @session: iscsi cls session 2402 * @dd_size: private driver data size 2403 * @cid: connection id 2404 */ 2405 struct iscsi_cls_conn * 2406 iscsi_alloc_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2407 { 2408 struct iscsi_transport *transport = session->transport; 2409 struct iscsi_cls_conn *conn; 2410 2411 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2412 if (!conn) 2413 return NULL; 2414 if (dd_size) 2415 conn->dd_data = &conn[1]; 2416 2417 mutex_init(&conn->ep_mutex); 2418 spin_lock_init(&conn->lock); 2419 INIT_LIST_HEAD(&conn->conn_list); 2420 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn); 2421 conn->transport = transport; 2422 conn->cid = cid; 2423 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2424 2425 /* this is released in the dev's release function */ 2426 if (!get_device(&session->dev)) 2427 goto free_conn; 2428 2429 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2430 device_initialize(&conn->dev); 2431 conn->dev.parent = &session->dev; 2432 conn->dev.release = iscsi_conn_release; 2433 2434 return conn; 2435 2436 free_conn: 2437 kfree(conn); 2438 return NULL; 2439 } 2440 EXPORT_SYMBOL_GPL(iscsi_alloc_conn); 2441 2442 /** 2443 * iscsi_add_conn - add iscsi class connection 2444 * @conn: iscsi cls connection 2445 * 2446 * This will expose iscsi_cls_conn to sysfs so make sure the related 2447 * resources for sysfs attributes are initialized before calling this. 2448 */ 2449 int iscsi_add_conn(struct iscsi_cls_conn *conn) 2450 { 2451 int err; 2452 unsigned long flags; 2453 struct iscsi_cls_session *session = iscsi_dev_to_session(conn->dev.parent); 2454 2455 err = device_add(&conn->dev); 2456 if (err) { 2457 iscsi_cls_session_printk(KERN_ERR, session, 2458 "could not register connection's dev\n"); 2459 return err; 2460 } 2461 err = transport_register_device(&conn->dev); 2462 if (err) { 2463 iscsi_cls_session_printk(KERN_ERR, session, 2464 "could not register transport's dev\n"); 2465 device_del(&conn->dev); 2466 return err; 2467 } 2468 2469 spin_lock_irqsave(&connlock, flags); 2470 list_add(&conn->conn_list, &connlist); 2471 spin_unlock_irqrestore(&connlock, flags); 2472 2473 return 0; 2474 } 2475 EXPORT_SYMBOL_GPL(iscsi_add_conn); 2476 2477 /** 2478 * iscsi_remove_conn - remove iscsi class connection from sysfs 2479 * @conn: iscsi cls connection 2480 * 2481 * Remove iscsi_cls_conn from sysfs, and wait for previous 2482 * read/write of iscsi_cls_conn's attributes in sysfs to finish. 2483 */ 2484 void iscsi_remove_conn(struct iscsi_cls_conn *conn) 2485 { 2486 unsigned long flags; 2487 2488 spin_lock_irqsave(&connlock, flags); 2489 list_del(&conn->conn_list); 2490 spin_unlock_irqrestore(&connlock, flags); 2491 2492 transport_unregister_device(&conn->dev); 2493 device_del(&conn->dev); 2494 } 2495 EXPORT_SYMBOL_GPL(iscsi_remove_conn); 2496 2497 void iscsi_put_conn(struct iscsi_cls_conn *conn) 2498 { 2499 put_device(&conn->dev); 2500 } 2501 EXPORT_SYMBOL_GPL(iscsi_put_conn); 2502 2503 void iscsi_get_conn(struct iscsi_cls_conn *conn) 2504 { 2505 get_device(&conn->dev); 2506 } 2507 EXPORT_SYMBOL_GPL(iscsi_get_conn); 2508 2509 /* 2510 * iscsi interface functions 2511 */ 2512 static struct iscsi_internal * 2513 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2514 { 2515 struct iscsi_internal *priv; 2516 unsigned long flags; 2517 2518 spin_lock_irqsave(&iscsi_transport_lock, flags); 2519 list_for_each_entry(priv, &iscsi_transports, list) { 2520 if (tt == priv->iscsi_transport) { 2521 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2522 return priv; 2523 } 2524 } 2525 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2526 return NULL; 2527 } 2528 2529 static int 2530 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2531 { 2532 return nlmsg_multicast(nls, skb, 0, group, gfp); 2533 } 2534 2535 static int 2536 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2537 { 2538 return nlmsg_unicast(nls, skb, portid); 2539 } 2540 2541 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2542 char *data, uint32_t data_size) 2543 { 2544 struct nlmsghdr *nlh; 2545 struct sk_buff *skb; 2546 struct iscsi_uevent *ev; 2547 char *pdu; 2548 struct iscsi_internal *priv; 2549 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2550 data_size); 2551 2552 priv = iscsi_if_transport_lookup(conn->transport); 2553 if (!priv) 2554 return -EINVAL; 2555 2556 skb = alloc_skb(len, GFP_ATOMIC); 2557 if (!skb) { 2558 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2559 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2560 "control PDU: OOM\n"); 2561 return -ENOMEM; 2562 } 2563 2564 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2565 ev = nlmsg_data(nlh); 2566 memset(ev, 0, sizeof(*ev)); 2567 ev->transport_handle = iscsi_handle(conn->transport); 2568 ev->type = ISCSI_KEVENT_RECV_PDU; 2569 ev->r.recv_req.cid = conn->cid; 2570 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2571 pdu = (char*)ev + sizeof(*ev); 2572 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2573 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2574 2575 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2576 } 2577 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2578 2579 int iscsi_offload_mesg(struct Scsi_Host *shost, 2580 struct iscsi_transport *transport, uint32_t type, 2581 char *data, uint16_t data_size) 2582 { 2583 struct nlmsghdr *nlh; 2584 struct sk_buff *skb; 2585 struct iscsi_uevent *ev; 2586 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2587 2588 skb = alloc_skb(len, GFP_ATOMIC); 2589 if (!skb) { 2590 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2591 return -ENOMEM; 2592 } 2593 2594 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2595 ev = nlmsg_data(nlh); 2596 memset(ev, 0, sizeof(*ev)); 2597 ev->type = type; 2598 ev->transport_handle = iscsi_handle(transport); 2599 switch (type) { 2600 case ISCSI_KEVENT_PATH_REQ: 2601 ev->r.req_path.host_no = shost->host_no; 2602 break; 2603 case ISCSI_KEVENT_IF_DOWN: 2604 ev->r.notify_if_down.host_no = shost->host_no; 2605 break; 2606 } 2607 2608 memcpy((char *)ev + sizeof(*ev), data, data_size); 2609 2610 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2611 } 2612 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2613 2614 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2615 { 2616 struct nlmsghdr *nlh; 2617 struct sk_buff *skb; 2618 struct iscsi_uevent *ev; 2619 struct iscsi_internal *priv; 2620 int len = nlmsg_total_size(sizeof(*ev)); 2621 unsigned long flags; 2622 int state; 2623 2624 spin_lock_irqsave(&conn->lock, flags); 2625 /* 2626 * Userspace will only do a stop call if we are at least bound. And, we 2627 * only need to do the in kernel cleanup if in the UP state so cmds can 2628 * be released to upper layers. If in other states just wait for 2629 * userspace to avoid races that can leave the cleanup_work queued. 2630 */ 2631 state = READ_ONCE(conn->state); 2632 switch (state) { 2633 case ISCSI_CONN_BOUND: 2634 case ISCSI_CONN_UP: 2635 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, 2636 &conn->flags)) { 2637 queue_work(iscsi_conn_cleanup_workq, 2638 &conn->cleanup_work); 2639 } 2640 break; 2641 default: 2642 ISCSI_DBG_TRANS_CONN(conn, "Got conn error in state %d\n", 2643 state); 2644 break; 2645 } 2646 spin_unlock_irqrestore(&conn->lock, flags); 2647 2648 priv = iscsi_if_transport_lookup(conn->transport); 2649 if (!priv) 2650 return; 2651 2652 skb = alloc_skb(len, GFP_ATOMIC); 2653 if (!skb) { 2654 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2655 "conn error (%d)\n", error); 2656 return; 2657 } 2658 2659 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2660 ev = nlmsg_data(nlh); 2661 ev->transport_handle = iscsi_handle(conn->transport); 2662 ev->type = ISCSI_KEVENT_CONN_ERROR; 2663 ev->r.connerror.error = error; 2664 ev->r.connerror.cid = conn->cid; 2665 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2666 2667 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2668 2669 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2670 error); 2671 } 2672 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2673 2674 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2675 enum iscsi_conn_state state) 2676 { 2677 struct nlmsghdr *nlh; 2678 struct sk_buff *skb; 2679 struct iscsi_uevent *ev; 2680 struct iscsi_internal *priv; 2681 int len = nlmsg_total_size(sizeof(*ev)); 2682 2683 priv = iscsi_if_transport_lookup(conn->transport); 2684 if (!priv) 2685 return; 2686 2687 skb = alloc_skb(len, GFP_ATOMIC); 2688 if (!skb) { 2689 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2690 "conn login (%d)\n", state); 2691 return; 2692 } 2693 2694 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2695 ev = nlmsg_data(nlh); 2696 ev->transport_handle = iscsi_handle(conn->transport); 2697 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2698 ev->r.conn_login.state = state; 2699 ev->r.conn_login.cid = conn->cid; 2700 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2701 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2702 2703 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2704 state); 2705 } 2706 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2707 2708 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2709 enum iscsi_host_event_code code, uint32_t data_size, 2710 uint8_t *data) 2711 { 2712 struct nlmsghdr *nlh; 2713 struct sk_buff *skb; 2714 struct iscsi_uevent *ev; 2715 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2716 2717 skb = alloc_skb(len, GFP_NOIO); 2718 if (!skb) { 2719 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2720 host_no, code); 2721 return; 2722 } 2723 2724 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2725 ev = nlmsg_data(nlh); 2726 ev->transport_handle = iscsi_handle(transport); 2727 ev->type = ISCSI_KEVENT_HOST_EVENT; 2728 ev->r.host_event.host_no = host_no; 2729 ev->r.host_event.code = code; 2730 ev->r.host_event.data_size = data_size; 2731 2732 if (data_size) 2733 memcpy((char *)ev + sizeof(*ev), data, data_size); 2734 2735 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2736 } 2737 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2738 2739 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2740 uint32_t status, uint32_t pid, uint32_t data_size, 2741 uint8_t *data) 2742 { 2743 struct nlmsghdr *nlh; 2744 struct sk_buff *skb; 2745 struct iscsi_uevent *ev; 2746 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2747 2748 skb = alloc_skb(len, GFP_NOIO); 2749 if (!skb) { 2750 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2751 return; 2752 } 2753 2754 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2755 ev = nlmsg_data(nlh); 2756 ev->transport_handle = iscsi_handle(transport); 2757 ev->type = ISCSI_KEVENT_PING_COMP; 2758 ev->r.ping_comp.host_no = host_no; 2759 ev->r.ping_comp.status = status; 2760 ev->r.ping_comp.pid = pid; 2761 ev->r.ping_comp.data_size = data_size; 2762 memcpy((char *)ev + sizeof(*ev), data, data_size); 2763 2764 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2765 } 2766 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2767 2768 static int 2769 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2770 { 2771 struct sk_buff *skb; 2772 struct nlmsghdr *nlh; 2773 int len = nlmsg_total_size(size); 2774 2775 skb = alloc_skb(len, GFP_ATOMIC); 2776 if (!skb) { 2777 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2778 return -ENOMEM; 2779 } 2780 2781 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2782 memcpy(nlmsg_data(nlh), payload, size); 2783 return iscsi_unicast_skb(skb, portid); 2784 } 2785 2786 static int 2787 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2788 { 2789 struct iscsi_uevent *ev = nlmsg_data(nlh); 2790 struct iscsi_stats *stats; 2791 struct sk_buff *skbstat; 2792 struct iscsi_cls_conn *conn; 2793 struct nlmsghdr *nlhstat; 2794 struct iscsi_uevent *evstat; 2795 struct iscsi_internal *priv; 2796 int len = nlmsg_total_size(sizeof(*ev) + 2797 sizeof(struct iscsi_stats) + 2798 sizeof(struct iscsi_stats_custom) * 2799 ISCSI_STATS_CUSTOM_MAX); 2800 int err = 0; 2801 2802 priv = iscsi_if_transport_lookup(transport); 2803 if (!priv) 2804 return -EINVAL; 2805 2806 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2807 if (!conn) 2808 return -EEXIST; 2809 2810 do { 2811 int actual_size; 2812 2813 skbstat = alloc_skb(len, GFP_ATOMIC); 2814 if (!skbstat) { 2815 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2816 "deliver stats: OOM\n"); 2817 return -ENOMEM; 2818 } 2819 2820 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2821 (len - sizeof(*nlhstat)), 0); 2822 evstat = nlmsg_data(nlhstat); 2823 memset(evstat, 0, sizeof(*evstat)); 2824 evstat->transport_handle = iscsi_handle(conn->transport); 2825 evstat->type = nlh->nlmsg_type; 2826 evstat->u.get_stats.cid = 2827 ev->u.get_stats.cid; 2828 evstat->u.get_stats.sid = 2829 ev->u.get_stats.sid; 2830 stats = (struct iscsi_stats *) 2831 ((char*)evstat + sizeof(*evstat)); 2832 memset(stats, 0, sizeof(*stats)); 2833 2834 transport->get_stats(conn, stats); 2835 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2836 sizeof(struct iscsi_stats) + 2837 sizeof(struct iscsi_stats_custom) * 2838 stats->custom_length); 2839 actual_size -= sizeof(*nlhstat); 2840 actual_size = nlmsg_msg_size(actual_size); 2841 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2842 nlhstat->nlmsg_len = actual_size; 2843 2844 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2845 GFP_ATOMIC); 2846 } while (err < 0 && err != -ECONNREFUSED); 2847 2848 return err; 2849 } 2850 2851 /** 2852 * iscsi_session_event - send session destr. completion event 2853 * @session: iscsi class session 2854 * @event: type of event 2855 */ 2856 int iscsi_session_event(struct iscsi_cls_session *session, 2857 enum iscsi_uevent_e event) 2858 { 2859 struct iscsi_internal *priv; 2860 struct Scsi_Host *shost; 2861 struct iscsi_uevent *ev; 2862 struct sk_buff *skb; 2863 struct nlmsghdr *nlh; 2864 int rc, len = nlmsg_total_size(sizeof(*ev)); 2865 2866 priv = iscsi_if_transport_lookup(session->transport); 2867 if (!priv) 2868 return -EINVAL; 2869 shost = iscsi_session_to_shost(session); 2870 2871 skb = alloc_skb(len, GFP_KERNEL); 2872 if (!skb) { 2873 iscsi_cls_session_printk(KERN_ERR, session, 2874 "Cannot notify userspace of session " 2875 "event %u\n", event); 2876 return -ENOMEM; 2877 } 2878 2879 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2880 ev = nlmsg_data(nlh); 2881 ev->transport_handle = iscsi_handle(session->transport); 2882 2883 ev->type = event; 2884 switch (event) { 2885 case ISCSI_KEVENT_DESTROY_SESSION: 2886 ev->r.d_session.host_no = shost->host_no; 2887 ev->r.d_session.sid = session->sid; 2888 break; 2889 case ISCSI_KEVENT_CREATE_SESSION: 2890 ev->r.c_session_ret.host_no = shost->host_no; 2891 ev->r.c_session_ret.sid = session->sid; 2892 break; 2893 case ISCSI_KEVENT_UNBIND_SESSION: 2894 ev->r.unbind_session.host_no = shost->host_no; 2895 ev->r.unbind_session.sid = session->sid; 2896 break; 2897 default: 2898 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2899 "%u.\n", event); 2900 kfree_skb(skb); 2901 return -EINVAL; 2902 } 2903 2904 /* 2905 * this will occur if the daemon is not up, so we just warn 2906 * the user and when the daemon is restarted it will handle it 2907 */ 2908 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2909 if (rc == -ESRCH) 2910 iscsi_cls_session_printk(KERN_ERR, session, 2911 "Cannot notify userspace of session " 2912 "event %u. Check iscsi daemon\n", 2913 event); 2914 2915 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2916 event, rc); 2917 return rc; 2918 } 2919 EXPORT_SYMBOL_GPL(iscsi_session_event); 2920 2921 static int 2922 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2923 struct iscsi_uevent *ev, pid_t pid, 2924 uint32_t initial_cmdsn, uint16_t cmds_max, 2925 uint16_t queue_depth) 2926 { 2927 struct iscsi_transport *transport = priv->iscsi_transport; 2928 struct iscsi_cls_session *session; 2929 struct Scsi_Host *shost; 2930 2931 session = transport->create_session(ep, cmds_max, queue_depth, 2932 initial_cmdsn); 2933 if (!session) 2934 return -ENOMEM; 2935 2936 session->creator = pid; 2937 shost = iscsi_session_to_shost(session); 2938 ev->r.c_session_ret.host_no = shost->host_no; 2939 ev->r.c_session_ret.sid = session->sid; 2940 ISCSI_DBG_TRANS_SESSION(session, 2941 "Completed creating transport session\n"); 2942 return 0; 2943 } 2944 2945 static int 2946 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2947 { 2948 struct iscsi_cls_conn *conn; 2949 struct iscsi_cls_session *session; 2950 2951 session = iscsi_session_lookup(ev->u.c_conn.sid); 2952 if (!session) { 2953 printk(KERN_ERR "iscsi: invalid session %d.\n", 2954 ev->u.c_conn.sid); 2955 return -EINVAL; 2956 } 2957 2958 conn = transport->create_conn(session, ev->u.c_conn.cid); 2959 if (!conn) { 2960 iscsi_cls_session_printk(KERN_ERR, session, 2961 "couldn't create a new connection."); 2962 return -ENOMEM; 2963 } 2964 2965 ev->r.c_conn_ret.sid = session->sid; 2966 ev->r.c_conn_ret.cid = conn->cid; 2967 2968 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2969 return 0; 2970 } 2971 2972 static int 2973 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2974 { 2975 struct iscsi_cls_conn *conn; 2976 2977 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2978 if (!conn) 2979 return -EINVAL; 2980 2981 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n"); 2982 flush_work(&conn->cleanup_work); 2983 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2984 2985 if (transport->destroy_conn) 2986 transport->destroy_conn(conn); 2987 return 0; 2988 } 2989 2990 static int 2991 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2992 { 2993 char *data = (char*)ev + sizeof(*ev); 2994 struct iscsi_cls_conn *conn; 2995 struct iscsi_cls_session *session; 2996 int err = 0, value = 0, state; 2997 2998 if (ev->u.set_param.len > PAGE_SIZE) 2999 return -EINVAL; 3000 3001 session = iscsi_session_lookup(ev->u.set_param.sid); 3002 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 3003 if (!conn || !session) 3004 return -EINVAL; 3005 3006 switch (ev->u.set_param.param) { 3007 case ISCSI_PARAM_SESS_RECOVERY_TMO: 3008 sscanf(data, "%d", &value); 3009 if (!session->recovery_tmo_sysfs_override) 3010 session->recovery_tmo = value; 3011 break; 3012 default: 3013 state = READ_ONCE(conn->state); 3014 if (state == ISCSI_CONN_BOUND || state == ISCSI_CONN_UP) { 3015 err = transport->set_param(conn, ev->u.set_param.param, 3016 data, ev->u.set_param.len); 3017 } else { 3018 return -ENOTCONN; 3019 } 3020 } 3021 3022 return err; 3023 } 3024 3025 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 3026 struct iscsi_uevent *ev, int msg_type) 3027 { 3028 struct iscsi_endpoint *ep; 3029 struct sockaddr *dst_addr; 3030 struct Scsi_Host *shost = NULL; 3031 int non_blocking, err = 0; 3032 3033 if (!transport->ep_connect) 3034 return -EINVAL; 3035 3036 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 3037 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 3038 if (!shost) { 3039 printk(KERN_ERR "ep connect failed. Could not find " 3040 "host no %u\n", 3041 ev->u.ep_connect_through_host.host_no); 3042 return -ENODEV; 3043 } 3044 non_blocking = ev->u.ep_connect_through_host.non_blocking; 3045 } else 3046 non_blocking = ev->u.ep_connect.non_blocking; 3047 3048 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3049 ep = transport->ep_connect(shost, dst_addr, non_blocking); 3050 if (IS_ERR(ep)) { 3051 err = PTR_ERR(ep); 3052 goto release_host; 3053 } 3054 3055 ev->r.ep_connect_ret.handle = ep->id; 3056 release_host: 3057 if (shost) 3058 scsi_host_put(shost); 3059 return err; 3060 } 3061 3062 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 3063 u64 ep_handle) 3064 { 3065 struct iscsi_cls_conn *conn; 3066 struct iscsi_endpoint *ep; 3067 3068 if (!transport->ep_disconnect) 3069 return -EINVAL; 3070 3071 ep = iscsi_lookup_endpoint(ep_handle); 3072 if (!ep) 3073 return -EINVAL; 3074 3075 conn = ep->conn; 3076 if (!conn) { 3077 /* 3078 * conn was not even bound yet, so we can't get iscsi conn 3079 * failures yet. 3080 */ 3081 transport->ep_disconnect(ep); 3082 goto put_ep; 3083 } 3084 3085 mutex_lock(&conn->ep_mutex); 3086 iscsi_if_disconnect_bound_ep(conn, ep, false); 3087 mutex_unlock(&conn->ep_mutex); 3088 put_ep: 3089 iscsi_put_endpoint(ep); 3090 return 0; 3091 } 3092 3093 static int 3094 iscsi_if_transport_ep(struct iscsi_transport *transport, 3095 struct iscsi_uevent *ev, int msg_type) 3096 { 3097 struct iscsi_endpoint *ep; 3098 int rc = 0; 3099 3100 switch (msg_type) { 3101 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3102 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3103 rc = iscsi_if_ep_connect(transport, ev, msg_type); 3104 break; 3105 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3106 if (!transport->ep_poll) 3107 return -EINVAL; 3108 3109 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 3110 if (!ep) 3111 return -EINVAL; 3112 3113 ev->r.retcode = transport->ep_poll(ep, 3114 ev->u.ep_poll.timeout_ms); 3115 iscsi_put_endpoint(ep); 3116 break; 3117 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3118 rc = iscsi_if_ep_disconnect(transport, 3119 ev->u.ep_disconnect.ep_handle); 3120 break; 3121 } 3122 return rc; 3123 } 3124 3125 static int 3126 iscsi_tgt_dscvr(struct iscsi_transport *transport, 3127 struct iscsi_uevent *ev) 3128 { 3129 struct Scsi_Host *shost; 3130 struct sockaddr *dst_addr; 3131 int err; 3132 3133 if (!transport->tgt_dscvr) 3134 return -EINVAL; 3135 3136 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3137 if (!shost) { 3138 printk(KERN_ERR "target discovery could not find host no %u\n", 3139 ev->u.tgt_dscvr.host_no); 3140 return -ENODEV; 3141 } 3142 3143 3144 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3145 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3146 ev->u.tgt_dscvr.enable, dst_addr); 3147 scsi_host_put(shost); 3148 return err; 3149 } 3150 3151 static int 3152 iscsi_set_host_param(struct iscsi_transport *transport, 3153 struct iscsi_uevent *ev) 3154 { 3155 char *data = (char*)ev + sizeof(*ev); 3156 struct Scsi_Host *shost; 3157 int err; 3158 3159 if (!transport->set_host_param) 3160 return -ENOSYS; 3161 3162 if (ev->u.set_host_param.len > PAGE_SIZE) 3163 return -EINVAL; 3164 3165 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3166 if (!shost) { 3167 printk(KERN_ERR "set_host_param could not find host no %u\n", 3168 ev->u.set_host_param.host_no); 3169 return -ENODEV; 3170 } 3171 3172 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3173 data, ev->u.set_host_param.len); 3174 scsi_host_put(shost); 3175 return err; 3176 } 3177 3178 static int 3179 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3180 { 3181 struct Scsi_Host *shost; 3182 struct iscsi_path *params; 3183 int err; 3184 3185 if (!transport->set_path) 3186 return -ENOSYS; 3187 3188 shost = scsi_host_lookup(ev->u.set_path.host_no); 3189 if (!shost) { 3190 printk(KERN_ERR "set path could not find host no %u\n", 3191 ev->u.set_path.host_no); 3192 return -ENODEV; 3193 } 3194 3195 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3196 err = transport->set_path(shost, params); 3197 3198 scsi_host_put(shost); 3199 return err; 3200 } 3201 3202 static int iscsi_session_has_conns(int sid) 3203 { 3204 struct iscsi_cls_conn *conn; 3205 unsigned long flags; 3206 int found = 0; 3207 3208 spin_lock_irqsave(&connlock, flags); 3209 list_for_each_entry(conn, &connlist, conn_list) { 3210 if (iscsi_conn_get_sid(conn) == sid) { 3211 found = 1; 3212 break; 3213 } 3214 } 3215 spin_unlock_irqrestore(&connlock, flags); 3216 3217 return found; 3218 } 3219 3220 static int 3221 iscsi_set_iface_params(struct iscsi_transport *transport, 3222 struct iscsi_uevent *ev, uint32_t len) 3223 { 3224 char *data = (char *)ev + sizeof(*ev); 3225 struct Scsi_Host *shost; 3226 int err; 3227 3228 if (!transport->set_iface_param) 3229 return -ENOSYS; 3230 3231 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3232 if (!shost) { 3233 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3234 ev->u.set_iface_params.host_no); 3235 return -ENODEV; 3236 } 3237 3238 err = transport->set_iface_param(shost, data, len); 3239 scsi_host_put(shost); 3240 return err; 3241 } 3242 3243 static int 3244 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3245 { 3246 struct Scsi_Host *shost; 3247 struct sockaddr *dst_addr; 3248 int err; 3249 3250 if (!transport->send_ping) 3251 return -ENOSYS; 3252 3253 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3254 if (!shost) { 3255 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3256 ev->u.iscsi_ping.host_no); 3257 return -ENODEV; 3258 } 3259 3260 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3261 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3262 ev->u.iscsi_ping.iface_type, 3263 ev->u.iscsi_ping.payload_size, 3264 ev->u.iscsi_ping.pid, 3265 dst_addr); 3266 scsi_host_put(shost); 3267 return err; 3268 } 3269 3270 static int 3271 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3272 { 3273 struct iscsi_uevent *ev = nlmsg_data(nlh); 3274 struct Scsi_Host *shost = NULL; 3275 struct iscsi_chap_rec *chap_rec; 3276 struct iscsi_internal *priv; 3277 struct sk_buff *skbchap; 3278 struct nlmsghdr *nlhchap; 3279 struct iscsi_uevent *evchap; 3280 uint32_t chap_buf_size; 3281 int len, err = 0; 3282 char *buf; 3283 3284 if (!transport->get_chap) 3285 return -EINVAL; 3286 3287 priv = iscsi_if_transport_lookup(transport); 3288 if (!priv) 3289 return -EINVAL; 3290 3291 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3292 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3293 3294 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3295 if (!shost) { 3296 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3297 __func__, ev->u.get_chap.host_no); 3298 return -ENODEV; 3299 } 3300 3301 do { 3302 int actual_size; 3303 3304 skbchap = alloc_skb(len, GFP_KERNEL); 3305 if (!skbchap) { 3306 printk(KERN_ERR "can not deliver chap: OOM\n"); 3307 err = -ENOMEM; 3308 goto exit_get_chap; 3309 } 3310 3311 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3312 (len - sizeof(*nlhchap)), 0); 3313 evchap = nlmsg_data(nlhchap); 3314 memset(evchap, 0, sizeof(*evchap)); 3315 evchap->transport_handle = iscsi_handle(transport); 3316 evchap->type = nlh->nlmsg_type; 3317 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3318 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3319 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3320 buf = (char *)evchap + sizeof(*evchap); 3321 memset(buf, 0, chap_buf_size); 3322 3323 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3324 &evchap->u.get_chap.num_entries, buf); 3325 3326 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3327 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3328 nlhchap->nlmsg_len = actual_size; 3329 3330 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3331 GFP_KERNEL); 3332 } while (err < 0 && err != -ECONNREFUSED); 3333 3334 exit_get_chap: 3335 scsi_host_put(shost); 3336 return err; 3337 } 3338 3339 static int iscsi_set_chap(struct iscsi_transport *transport, 3340 struct iscsi_uevent *ev, uint32_t len) 3341 { 3342 char *data = (char *)ev + sizeof(*ev); 3343 struct Scsi_Host *shost; 3344 int err = 0; 3345 3346 if (!transport->set_chap) 3347 return -ENOSYS; 3348 3349 shost = scsi_host_lookup(ev->u.set_path.host_no); 3350 if (!shost) { 3351 pr_err("%s could not find host no %u\n", 3352 __func__, ev->u.set_path.host_no); 3353 return -ENODEV; 3354 } 3355 3356 err = transport->set_chap(shost, data, len); 3357 scsi_host_put(shost); 3358 return err; 3359 } 3360 3361 static int iscsi_delete_chap(struct iscsi_transport *transport, 3362 struct iscsi_uevent *ev) 3363 { 3364 struct Scsi_Host *shost; 3365 int err = 0; 3366 3367 if (!transport->delete_chap) 3368 return -ENOSYS; 3369 3370 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3371 if (!shost) { 3372 printk(KERN_ERR "%s could not find host no %u\n", 3373 __func__, ev->u.delete_chap.host_no); 3374 return -ENODEV; 3375 } 3376 3377 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3378 scsi_host_put(shost); 3379 return err; 3380 } 3381 3382 static const struct { 3383 enum iscsi_discovery_parent_type value; 3384 char *name; 3385 } iscsi_discovery_parent_names[] = { 3386 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3387 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3388 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3389 }; 3390 3391 char *iscsi_get_discovery_parent_name(int parent_type) 3392 { 3393 int i; 3394 char *state = "Unknown!"; 3395 3396 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3397 if (iscsi_discovery_parent_names[i].value & parent_type) { 3398 state = iscsi_discovery_parent_names[i].name; 3399 break; 3400 } 3401 } 3402 return state; 3403 } 3404 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3405 3406 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3407 struct iscsi_uevent *ev, uint32_t len) 3408 { 3409 char *data = (char *)ev + sizeof(*ev); 3410 struct Scsi_Host *shost; 3411 struct iscsi_bus_flash_session *fnode_sess; 3412 struct iscsi_bus_flash_conn *fnode_conn; 3413 struct device *dev; 3414 uint32_t idx; 3415 int err = 0; 3416 3417 if (!transport->set_flashnode_param) { 3418 err = -ENOSYS; 3419 goto exit_set_fnode; 3420 } 3421 3422 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3423 if (!shost) { 3424 pr_err("%s could not find host no %u\n", 3425 __func__, ev->u.set_flashnode.host_no); 3426 err = -ENODEV; 3427 goto exit_set_fnode; 3428 } 3429 3430 idx = ev->u.set_flashnode.flashnode_idx; 3431 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3432 if (!fnode_sess) { 3433 pr_err("%s could not find flashnode %u for host no %u\n", 3434 __func__, idx, ev->u.set_flashnode.host_no); 3435 err = -ENODEV; 3436 goto put_host; 3437 } 3438 3439 dev = iscsi_find_flashnode_conn(fnode_sess); 3440 if (!dev) { 3441 err = -ENODEV; 3442 goto put_sess; 3443 } 3444 3445 fnode_conn = iscsi_dev_to_flash_conn(dev); 3446 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3447 put_device(dev); 3448 3449 put_sess: 3450 put_device(&fnode_sess->dev); 3451 3452 put_host: 3453 scsi_host_put(shost); 3454 3455 exit_set_fnode: 3456 return err; 3457 } 3458 3459 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3460 struct iscsi_uevent *ev, uint32_t len) 3461 { 3462 char *data = (char *)ev + sizeof(*ev); 3463 struct Scsi_Host *shost; 3464 int index; 3465 int err = 0; 3466 3467 if (!transport->new_flashnode) { 3468 err = -ENOSYS; 3469 goto exit_new_fnode; 3470 } 3471 3472 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3473 if (!shost) { 3474 pr_err("%s could not find host no %u\n", 3475 __func__, ev->u.new_flashnode.host_no); 3476 err = -ENODEV; 3477 goto put_host; 3478 } 3479 3480 index = transport->new_flashnode(shost, data, len); 3481 3482 if (index >= 0) 3483 ev->r.new_flashnode_ret.flashnode_idx = index; 3484 else 3485 err = -EIO; 3486 3487 put_host: 3488 scsi_host_put(shost); 3489 3490 exit_new_fnode: 3491 return err; 3492 } 3493 3494 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3495 struct iscsi_uevent *ev) 3496 { 3497 struct Scsi_Host *shost; 3498 struct iscsi_bus_flash_session *fnode_sess; 3499 uint32_t idx; 3500 int err = 0; 3501 3502 if (!transport->del_flashnode) { 3503 err = -ENOSYS; 3504 goto exit_del_fnode; 3505 } 3506 3507 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3508 if (!shost) { 3509 pr_err("%s could not find host no %u\n", 3510 __func__, ev->u.del_flashnode.host_no); 3511 err = -ENODEV; 3512 goto put_host; 3513 } 3514 3515 idx = ev->u.del_flashnode.flashnode_idx; 3516 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3517 if (!fnode_sess) { 3518 pr_err("%s could not find flashnode %u for host no %u\n", 3519 __func__, idx, ev->u.del_flashnode.host_no); 3520 err = -ENODEV; 3521 goto put_host; 3522 } 3523 3524 err = transport->del_flashnode(fnode_sess); 3525 put_device(&fnode_sess->dev); 3526 3527 put_host: 3528 scsi_host_put(shost); 3529 3530 exit_del_fnode: 3531 return err; 3532 } 3533 3534 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3535 struct iscsi_uevent *ev) 3536 { 3537 struct Scsi_Host *shost; 3538 struct iscsi_bus_flash_session *fnode_sess; 3539 struct iscsi_bus_flash_conn *fnode_conn; 3540 struct device *dev; 3541 uint32_t idx; 3542 int err = 0; 3543 3544 if (!transport->login_flashnode) { 3545 err = -ENOSYS; 3546 goto exit_login_fnode; 3547 } 3548 3549 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3550 if (!shost) { 3551 pr_err("%s could not find host no %u\n", 3552 __func__, ev->u.login_flashnode.host_no); 3553 err = -ENODEV; 3554 goto put_host; 3555 } 3556 3557 idx = ev->u.login_flashnode.flashnode_idx; 3558 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3559 if (!fnode_sess) { 3560 pr_err("%s could not find flashnode %u for host no %u\n", 3561 __func__, idx, ev->u.login_flashnode.host_no); 3562 err = -ENODEV; 3563 goto put_host; 3564 } 3565 3566 dev = iscsi_find_flashnode_conn(fnode_sess); 3567 if (!dev) { 3568 err = -ENODEV; 3569 goto put_sess; 3570 } 3571 3572 fnode_conn = iscsi_dev_to_flash_conn(dev); 3573 err = transport->login_flashnode(fnode_sess, fnode_conn); 3574 put_device(dev); 3575 3576 put_sess: 3577 put_device(&fnode_sess->dev); 3578 3579 put_host: 3580 scsi_host_put(shost); 3581 3582 exit_login_fnode: 3583 return err; 3584 } 3585 3586 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3587 struct iscsi_uevent *ev) 3588 { 3589 struct Scsi_Host *shost; 3590 struct iscsi_bus_flash_session *fnode_sess; 3591 struct iscsi_bus_flash_conn *fnode_conn; 3592 struct device *dev; 3593 uint32_t idx; 3594 int err = 0; 3595 3596 if (!transport->logout_flashnode) { 3597 err = -ENOSYS; 3598 goto exit_logout_fnode; 3599 } 3600 3601 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3602 if (!shost) { 3603 pr_err("%s could not find host no %u\n", 3604 __func__, ev->u.logout_flashnode.host_no); 3605 err = -ENODEV; 3606 goto put_host; 3607 } 3608 3609 idx = ev->u.logout_flashnode.flashnode_idx; 3610 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3611 if (!fnode_sess) { 3612 pr_err("%s could not find flashnode %u for host no %u\n", 3613 __func__, idx, ev->u.logout_flashnode.host_no); 3614 err = -ENODEV; 3615 goto put_host; 3616 } 3617 3618 dev = iscsi_find_flashnode_conn(fnode_sess); 3619 if (!dev) { 3620 err = -ENODEV; 3621 goto put_sess; 3622 } 3623 3624 fnode_conn = iscsi_dev_to_flash_conn(dev); 3625 3626 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3627 put_device(dev); 3628 3629 put_sess: 3630 put_device(&fnode_sess->dev); 3631 3632 put_host: 3633 scsi_host_put(shost); 3634 3635 exit_logout_fnode: 3636 return err; 3637 } 3638 3639 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3640 struct iscsi_uevent *ev) 3641 { 3642 struct Scsi_Host *shost; 3643 struct iscsi_cls_session *session; 3644 int err = 0; 3645 3646 if (!transport->logout_flashnode_sid) { 3647 err = -ENOSYS; 3648 goto exit_logout_sid; 3649 } 3650 3651 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3652 if (!shost) { 3653 pr_err("%s could not find host no %u\n", 3654 __func__, ev->u.logout_flashnode.host_no); 3655 err = -ENODEV; 3656 goto put_host; 3657 } 3658 3659 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3660 if (!session) { 3661 pr_err("%s could not find session id %u\n", 3662 __func__, ev->u.logout_flashnode_sid.sid); 3663 err = -EINVAL; 3664 goto put_host; 3665 } 3666 3667 err = transport->logout_flashnode_sid(session); 3668 3669 put_host: 3670 scsi_host_put(shost); 3671 3672 exit_logout_sid: 3673 return err; 3674 } 3675 3676 static int 3677 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3678 { 3679 struct iscsi_uevent *ev = nlmsg_data(nlh); 3680 struct Scsi_Host *shost = NULL; 3681 struct iscsi_internal *priv; 3682 struct sk_buff *skbhost_stats; 3683 struct nlmsghdr *nlhhost_stats; 3684 struct iscsi_uevent *evhost_stats; 3685 int host_stats_size = 0; 3686 int len, err = 0; 3687 char *buf; 3688 3689 if (!transport->get_host_stats) 3690 return -ENOSYS; 3691 3692 priv = iscsi_if_transport_lookup(transport); 3693 if (!priv) 3694 return -EINVAL; 3695 3696 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3697 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3698 3699 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3700 if (!shost) { 3701 pr_err("%s: failed. Could not find host no %u\n", 3702 __func__, ev->u.get_host_stats.host_no); 3703 return -ENODEV; 3704 } 3705 3706 do { 3707 int actual_size; 3708 3709 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3710 if (!skbhost_stats) { 3711 pr_err("cannot deliver host stats: OOM\n"); 3712 err = -ENOMEM; 3713 goto exit_host_stats; 3714 } 3715 3716 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3717 (len - sizeof(*nlhhost_stats)), 0); 3718 evhost_stats = nlmsg_data(nlhhost_stats); 3719 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3720 evhost_stats->transport_handle = iscsi_handle(transport); 3721 evhost_stats->type = nlh->nlmsg_type; 3722 evhost_stats->u.get_host_stats.host_no = 3723 ev->u.get_host_stats.host_no; 3724 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3725 memset(buf, 0, host_stats_size); 3726 3727 err = transport->get_host_stats(shost, buf, host_stats_size); 3728 if (err) { 3729 kfree_skb(skbhost_stats); 3730 goto exit_host_stats; 3731 } 3732 3733 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3734 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3735 nlhhost_stats->nlmsg_len = actual_size; 3736 3737 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3738 GFP_KERNEL); 3739 } while (err < 0 && err != -ECONNREFUSED); 3740 3741 exit_host_stats: 3742 scsi_host_put(shost); 3743 return err; 3744 } 3745 3746 static int iscsi_if_transport_conn(struct iscsi_transport *transport, 3747 struct nlmsghdr *nlh) 3748 { 3749 struct iscsi_uevent *ev = nlmsg_data(nlh); 3750 struct iscsi_cls_session *session; 3751 struct iscsi_cls_conn *conn = NULL; 3752 struct iscsi_endpoint *ep; 3753 uint32_t pdu_len; 3754 int err = 0; 3755 3756 switch (nlh->nlmsg_type) { 3757 case ISCSI_UEVENT_CREATE_CONN: 3758 return iscsi_if_create_conn(transport, ev); 3759 case ISCSI_UEVENT_DESTROY_CONN: 3760 return iscsi_if_destroy_conn(transport, ev); 3761 case ISCSI_UEVENT_STOP_CONN: 3762 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, 3763 ev->u.stop_conn.cid); 3764 if (!conn) 3765 return -EINVAL; 3766 3767 return iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3768 } 3769 3770 /* 3771 * The following cmds need to be run under the ep_mutex so in kernel 3772 * conn cleanup (ep_disconnect + unbind and conn) is not done while 3773 * these are running. They also must not run if we have just run a conn 3774 * cleanup because they would set the state in a way that might allow 3775 * IO or send IO themselves. 3776 */ 3777 switch (nlh->nlmsg_type) { 3778 case ISCSI_UEVENT_START_CONN: 3779 conn = iscsi_conn_lookup(ev->u.start_conn.sid, 3780 ev->u.start_conn.cid); 3781 break; 3782 case ISCSI_UEVENT_BIND_CONN: 3783 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3784 break; 3785 case ISCSI_UEVENT_SEND_PDU: 3786 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3787 break; 3788 } 3789 3790 if (!conn) 3791 return -EINVAL; 3792 3793 mutex_lock(&conn->ep_mutex); 3794 spin_lock_irq(&conn->lock); 3795 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 3796 spin_unlock_irq(&conn->lock); 3797 mutex_unlock(&conn->ep_mutex); 3798 ev->r.retcode = -ENOTCONN; 3799 return 0; 3800 } 3801 spin_unlock_irq(&conn->lock); 3802 3803 switch (nlh->nlmsg_type) { 3804 case ISCSI_UEVENT_BIND_CONN: 3805 session = iscsi_session_lookup(ev->u.b_conn.sid); 3806 if (!session) { 3807 err = -EINVAL; 3808 break; 3809 } 3810 3811 ev->r.retcode = transport->bind_conn(session, conn, 3812 ev->u.b_conn.transport_eph, 3813 ev->u.b_conn.is_leading); 3814 if (!ev->r.retcode) 3815 WRITE_ONCE(conn->state, ISCSI_CONN_BOUND); 3816 3817 if (ev->r.retcode || !transport->ep_connect) 3818 break; 3819 3820 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3821 if (ep) { 3822 ep->conn = conn; 3823 conn->ep = ep; 3824 iscsi_put_endpoint(ep); 3825 } else { 3826 err = -ENOTCONN; 3827 iscsi_cls_conn_printk(KERN_ERR, conn, 3828 "Could not set ep conn binding\n"); 3829 } 3830 break; 3831 case ISCSI_UEVENT_START_CONN: 3832 ev->r.retcode = transport->start_conn(conn); 3833 if (!ev->r.retcode) 3834 WRITE_ONCE(conn->state, ISCSI_CONN_UP); 3835 3836 break; 3837 case ISCSI_UEVENT_SEND_PDU: 3838 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev); 3839 3840 if ((ev->u.send_pdu.hdr_size > pdu_len) || 3841 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) { 3842 err = -EINVAL; 3843 break; 3844 } 3845 3846 ev->r.retcode = transport->send_pdu(conn, 3847 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)), 3848 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3849 ev->u.send_pdu.data_size); 3850 break; 3851 default: 3852 err = -ENOSYS; 3853 } 3854 3855 mutex_unlock(&conn->ep_mutex); 3856 return err; 3857 } 3858 3859 static int 3860 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3861 { 3862 int err = 0; 3863 u32 portid; 3864 struct iscsi_uevent *ev = nlmsg_data(nlh); 3865 struct iscsi_transport *transport = NULL; 3866 struct iscsi_internal *priv; 3867 struct iscsi_cls_session *session; 3868 struct iscsi_endpoint *ep = NULL; 3869 3870 if (!netlink_capable(skb, CAP_SYS_ADMIN)) 3871 return -EPERM; 3872 3873 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3874 *group = ISCSI_NL_GRP_UIP; 3875 else 3876 *group = ISCSI_NL_GRP_ISCSID; 3877 3878 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3879 if (!priv) 3880 return -EINVAL; 3881 transport = priv->iscsi_transport; 3882 3883 if (!try_module_get(transport->owner)) 3884 return -EINVAL; 3885 3886 portid = NETLINK_CB(skb).portid; 3887 3888 switch (nlh->nlmsg_type) { 3889 case ISCSI_UEVENT_CREATE_SESSION: 3890 err = iscsi_if_create_session(priv, ep, ev, 3891 portid, 3892 ev->u.c_session.initial_cmdsn, 3893 ev->u.c_session.cmds_max, 3894 ev->u.c_session.queue_depth); 3895 break; 3896 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3897 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3898 if (!ep) { 3899 err = -EINVAL; 3900 break; 3901 } 3902 3903 err = iscsi_if_create_session(priv, ep, ev, 3904 portid, 3905 ev->u.c_bound_session.initial_cmdsn, 3906 ev->u.c_bound_session.cmds_max, 3907 ev->u.c_bound_session.queue_depth); 3908 iscsi_put_endpoint(ep); 3909 break; 3910 case ISCSI_UEVENT_DESTROY_SESSION: 3911 session = iscsi_session_lookup(ev->u.d_session.sid); 3912 if (!session) 3913 err = -EINVAL; 3914 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3915 err = -EBUSY; 3916 else 3917 transport->destroy_session(session); 3918 break; 3919 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3920 session = iscsi_session_lookup(ev->u.d_session.sid); 3921 if (!session) 3922 err = -EINVAL; 3923 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3924 err = -EBUSY; 3925 else { 3926 unsigned long flags; 3927 3928 /* Prevent this session from being found again */ 3929 spin_lock_irqsave(&sesslock, flags); 3930 list_del_init(&session->sess_list); 3931 spin_unlock_irqrestore(&sesslock, flags); 3932 3933 queue_work(system_unbound_wq, &session->destroy_work); 3934 } 3935 break; 3936 case ISCSI_UEVENT_UNBIND_SESSION: 3937 session = iscsi_session_lookup(ev->u.d_session.sid); 3938 if (session) 3939 queue_work(session->workq, &session->unbind_work); 3940 else 3941 err = -EINVAL; 3942 break; 3943 case ISCSI_UEVENT_SET_PARAM: 3944 err = iscsi_set_param(transport, ev); 3945 break; 3946 case ISCSI_UEVENT_CREATE_CONN: 3947 case ISCSI_UEVENT_DESTROY_CONN: 3948 case ISCSI_UEVENT_STOP_CONN: 3949 case ISCSI_UEVENT_START_CONN: 3950 case ISCSI_UEVENT_BIND_CONN: 3951 case ISCSI_UEVENT_SEND_PDU: 3952 err = iscsi_if_transport_conn(transport, nlh); 3953 break; 3954 case ISCSI_UEVENT_GET_STATS: 3955 err = iscsi_if_get_stats(transport, nlh); 3956 break; 3957 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3958 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3959 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3960 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3961 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3962 break; 3963 case ISCSI_UEVENT_TGT_DSCVR: 3964 err = iscsi_tgt_dscvr(transport, ev); 3965 break; 3966 case ISCSI_UEVENT_SET_HOST_PARAM: 3967 err = iscsi_set_host_param(transport, ev); 3968 break; 3969 case ISCSI_UEVENT_PATH_UPDATE: 3970 err = iscsi_set_path(transport, ev); 3971 break; 3972 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3973 err = iscsi_set_iface_params(transport, ev, 3974 nlmsg_attrlen(nlh, sizeof(*ev))); 3975 break; 3976 case ISCSI_UEVENT_PING: 3977 err = iscsi_send_ping(transport, ev); 3978 break; 3979 case ISCSI_UEVENT_GET_CHAP: 3980 err = iscsi_get_chap(transport, nlh); 3981 break; 3982 case ISCSI_UEVENT_DELETE_CHAP: 3983 err = iscsi_delete_chap(transport, ev); 3984 break; 3985 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3986 err = iscsi_set_flashnode_param(transport, ev, 3987 nlmsg_attrlen(nlh, 3988 sizeof(*ev))); 3989 break; 3990 case ISCSI_UEVENT_NEW_FLASHNODE: 3991 err = iscsi_new_flashnode(transport, ev, 3992 nlmsg_attrlen(nlh, sizeof(*ev))); 3993 break; 3994 case ISCSI_UEVENT_DEL_FLASHNODE: 3995 err = iscsi_del_flashnode(transport, ev); 3996 break; 3997 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3998 err = iscsi_login_flashnode(transport, ev); 3999 break; 4000 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 4001 err = iscsi_logout_flashnode(transport, ev); 4002 break; 4003 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 4004 err = iscsi_logout_flashnode_sid(transport, ev); 4005 break; 4006 case ISCSI_UEVENT_SET_CHAP: 4007 err = iscsi_set_chap(transport, ev, 4008 nlmsg_attrlen(nlh, sizeof(*ev))); 4009 break; 4010 case ISCSI_UEVENT_GET_HOST_STATS: 4011 err = iscsi_get_host_stats(transport, nlh); 4012 break; 4013 default: 4014 err = -ENOSYS; 4015 break; 4016 } 4017 4018 module_put(transport->owner); 4019 return err; 4020 } 4021 4022 /* 4023 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 4024 * Malformed skbs with wrong lengths or invalid creds are not processed. 4025 */ 4026 static void 4027 iscsi_if_rx(struct sk_buff *skb) 4028 { 4029 u32 portid = NETLINK_CB(skb).portid; 4030 4031 mutex_lock(&rx_queue_mutex); 4032 while (skb->len >= NLMSG_HDRLEN) { 4033 int err; 4034 uint32_t rlen; 4035 struct nlmsghdr *nlh; 4036 struct iscsi_uevent *ev; 4037 uint32_t group; 4038 int retries = ISCSI_SEND_MAX_ALLOWED; 4039 4040 nlh = nlmsg_hdr(skb); 4041 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 4042 skb->len < nlh->nlmsg_len) { 4043 break; 4044 } 4045 4046 ev = nlmsg_data(nlh); 4047 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 4048 if (rlen > skb->len) 4049 rlen = skb->len; 4050 4051 err = iscsi_if_recv_msg(skb, nlh, &group); 4052 if (err) { 4053 ev->type = ISCSI_KEVENT_IF_ERROR; 4054 ev->iferror = err; 4055 } 4056 do { 4057 /* 4058 * special case for GET_STATS: 4059 * on success - sending reply and stats from 4060 * inside of if_recv_msg(), 4061 * on error - fall through. 4062 */ 4063 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 4064 break; 4065 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 4066 break; 4067 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 4068 ev, sizeof(*ev)); 4069 if (err == -EAGAIN && --retries < 0) { 4070 printk(KERN_WARNING "Send reply failed, error %d\n", err); 4071 break; 4072 } 4073 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 4074 skb_pull(skb, rlen); 4075 } 4076 mutex_unlock(&rx_queue_mutex); 4077 } 4078 4079 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 4080 struct device_attribute dev_attr_##_prefix##_##_name = \ 4081 __ATTR(_name,_mode,_show,_store) 4082 4083 /* 4084 * iSCSI connection attrs 4085 */ 4086 #define iscsi_conn_attr_show(param) \ 4087 static ssize_t \ 4088 show_conn_param_##param(struct device *dev, \ 4089 struct device_attribute *attr, char *buf) \ 4090 { \ 4091 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4092 struct iscsi_transport *t = conn->transport; \ 4093 return t->get_conn_param(conn, param, buf); \ 4094 } 4095 4096 #define iscsi_conn_attr(field, param) \ 4097 iscsi_conn_attr_show(param) \ 4098 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 4099 NULL); 4100 4101 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 4102 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 4103 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 4104 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 4105 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 4106 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 4107 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 4108 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 4109 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 4110 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 4111 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 4112 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 4113 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 4114 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 4115 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 4116 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 4117 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 4118 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 4119 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 4120 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 4121 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 4122 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 4123 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 4124 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 4125 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 4126 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 4127 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 4128 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 4129 4130 static const char *const connection_state_names[] = { 4131 [ISCSI_CONN_UP] = "up", 4132 [ISCSI_CONN_DOWN] = "down", 4133 [ISCSI_CONN_FAILED] = "failed", 4134 [ISCSI_CONN_BOUND] = "bound" 4135 }; 4136 4137 static ssize_t show_conn_state(struct device *dev, 4138 struct device_attribute *attr, char *buf) 4139 { 4140 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 4141 const char *state = "unknown"; 4142 int conn_state = READ_ONCE(conn->state); 4143 4144 if (conn_state >= 0 && 4145 conn_state < ARRAY_SIZE(connection_state_names)) 4146 state = connection_state_names[conn_state]; 4147 4148 return sysfs_emit(buf, "%s\n", state); 4149 } 4150 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 4151 NULL); 4152 4153 #define iscsi_conn_ep_attr_show(param) \ 4154 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 4155 struct device_attribute *attr,\ 4156 char *buf) \ 4157 { \ 4158 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4159 struct iscsi_transport *t = conn->transport; \ 4160 struct iscsi_endpoint *ep; \ 4161 ssize_t rc; \ 4162 \ 4163 /* \ 4164 * Need to make sure ep_disconnect does not free the LLD's \ 4165 * interconnect resources while we are trying to read them. \ 4166 */ \ 4167 mutex_lock(&conn->ep_mutex); \ 4168 ep = conn->ep; \ 4169 if (!ep && t->ep_connect) { \ 4170 mutex_unlock(&conn->ep_mutex); \ 4171 return -ENOTCONN; \ 4172 } \ 4173 \ 4174 if (ep) \ 4175 rc = t->get_ep_param(ep, param, buf); \ 4176 else \ 4177 rc = t->get_conn_param(conn, param, buf); \ 4178 mutex_unlock(&conn->ep_mutex); \ 4179 return rc; \ 4180 } 4181 4182 #define iscsi_conn_ep_attr(field, param) \ 4183 iscsi_conn_ep_attr_show(param) \ 4184 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4185 show_conn_ep_param_##param, NULL); 4186 4187 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4188 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4189 4190 static struct attribute *iscsi_conn_attrs[] = { 4191 &dev_attr_conn_max_recv_dlength.attr, 4192 &dev_attr_conn_max_xmit_dlength.attr, 4193 &dev_attr_conn_header_digest.attr, 4194 &dev_attr_conn_data_digest.attr, 4195 &dev_attr_conn_ifmarker.attr, 4196 &dev_attr_conn_ofmarker.attr, 4197 &dev_attr_conn_address.attr, 4198 &dev_attr_conn_port.attr, 4199 &dev_attr_conn_exp_statsn.attr, 4200 &dev_attr_conn_persistent_address.attr, 4201 &dev_attr_conn_persistent_port.attr, 4202 &dev_attr_conn_ping_tmo.attr, 4203 &dev_attr_conn_recv_tmo.attr, 4204 &dev_attr_conn_local_port.attr, 4205 &dev_attr_conn_statsn.attr, 4206 &dev_attr_conn_keepalive_tmo.attr, 4207 &dev_attr_conn_max_segment_size.attr, 4208 &dev_attr_conn_tcp_timestamp_stat.attr, 4209 &dev_attr_conn_tcp_wsf_disable.attr, 4210 &dev_attr_conn_tcp_nagle_disable.attr, 4211 &dev_attr_conn_tcp_timer_scale.attr, 4212 &dev_attr_conn_tcp_timestamp_enable.attr, 4213 &dev_attr_conn_fragment_disable.attr, 4214 &dev_attr_conn_ipv4_tos.attr, 4215 &dev_attr_conn_ipv6_traffic_class.attr, 4216 &dev_attr_conn_ipv6_flow_label.attr, 4217 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4218 &dev_attr_conn_tcp_xmit_wsf.attr, 4219 &dev_attr_conn_tcp_recv_wsf.attr, 4220 &dev_attr_conn_local_ipaddr.attr, 4221 &dev_attr_conn_state.attr, 4222 NULL, 4223 }; 4224 4225 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4226 struct attribute *attr, int i) 4227 { 4228 struct device *cdev = container_of(kobj, struct device, kobj); 4229 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4230 struct iscsi_transport *t = conn->transport; 4231 int param; 4232 4233 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4234 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4235 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4236 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4237 else if (attr == &dev_attr_conn_header_digest.attr) 4238 param = ISCSI_PARAM_HDRDGST_EN; 4239 else if (attr == &dev_attr_conn_data_digest.attr) 4240 param = ISCSI_PARAM_DATADGST_EN; 4241 else if (attr == &dev_attr_conn_ifmarker.attr) 4242 param = ISCSI_PARAM_IFMARKER_EN; 4243 else if (attr == &dev_attr_conn_ofmarker.attr) 4244 param = ISCSI_PARAM_OFMARKER_EN; 4245 else if (attr == &dev_attr_conn_address.attr) 4246 param = ISCSI_PARAM_CONN_ADDRESS; 4247 else if (attr == &dev_attr_conn_port.attr) 4248 param = ISCSI_PARAM_CONN_PORT; 4249 else if (attr == &dev_attr_conn_exp_statsn.attr) 4250 param = ISCSI_PARAM_EXP_STATSN; 4251 else if (attr == &dev_attr_conn_persistent_address.attr) 4252 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4253 else if (attr == &dev_attr_conn_persistent_port.attr) 4254 param = ISCSI_PARAM_PERSISTENT_PORT; 4255 else if (attr == &dev_attr_conn_ping_tmo.attr) 4256 param = ISCSI_PARAM_PING_TMO; 4257 else if (attr == &dev_attr_conn_recv_tmo.attr) 4258 param = ISCSI_PARAM_RECV_TMO; 4259 else if (attr == &dev_attr_conn_local_port.attr) 4260 param = ISCSI_PARAM_LOCAL_PORT; 4261 else if (attr == &dev_attr_conn_statsn.attr) 4262 param = ISCSI_PARAM_STATSN; 4263 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4264 param = ISCSI_PARAM_KEEPALIVE_TMO; 4265 else if (attr == &dev_attr_conn_max_segment_size.attr) 4266 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4267 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4268 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4269 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4270 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4271 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4272 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4273 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4274 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4275 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4276 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4277 else if (attr == &dev_attr_conn_fragment_disable.attr) 4278 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4279 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4280 param = ISCSI_PARAM_IPV4_TOS; 4281 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4282 param = ISCSI_PARAM_IPV6_TC; 4283 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4284 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4285 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4286 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4287 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4288 param = ISCSI_PARAM_TCP_XMIT_WSF; 4289 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4290 param = ISCSI_PARAM_TCP_RECV_WSF; 4291 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4292 param = ISCSI_PARAM_LOCAL_IPADDR; 4293 else if (attr == &dev_attr_conn_state.attr) 4294 return S_IRUGO; 4295 else { 4296 WARN_ONCE(1, "Invalid conn attr"); 4297 return 0; 4298 } 4299 4300 return t->attr_is_visible(ISCSI_PARAM, param); 4301 } 4302 4303 static struct attribute_group iscsi_conn_group = { 4304 .attrs = iscsi_conn_attrs, 4305 .is_visible = iscsi_conn_attr_is_visible, 4306 }; 4307 4308 /* 4309 * iSCSI session attrs 4310 */ 4311 #define iscsi_session_attr_show(param, perm) \ 4312 static ssize_t \ 4313 show_session_param_##param(struct device *dev, \ 4314 struct device_attribute *attr, char *buf) \ 4315 { \ 4316 struct iscsi_cls_session *session = \ 4317 iscsi_dev_to_session(dev->parent); \ 4318 struct iscsi_transport *t = session->transport; \ 4319 \ 4320 if (perm && !capable(CAP_SYS_ADMIN)) \ 4321 return -EACCES; \ 4322 return t->get_session_param(session, param, buf); \ 4323 } 4324 4325 #define iscsi_session_attr(field, param, perm) \ 4326 iscsi_session_attr_show(param, perm) \ 4327 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4328 NULL); 4329 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4330 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4331 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4332 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4333 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4334 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4335 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4336 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4337 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4338 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4339 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4340 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4341 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4342 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4343 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4344 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4345 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4346 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4347 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4348 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4349 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4350 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4351 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4352 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4353 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4354 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4355 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4356 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4357 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4358 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4359 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4360 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4361 iscsi_session_attr(discovery_auth_optional, 4362 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4363 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4364 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4365 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4366 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4367 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4368 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4369 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4370 4371 static ssize_t 4372 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4373 char *buf) 4374 { 4375 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4376 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state)); 4377 } 4378 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4379 NULL); 4380 static ssize_t 4381 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4382 char *buf) 4383 { 4384 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4385 return sysfs_emit(buf, "%d\n", session->creator); 4386 } 4387 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4388 NULL); 4389 static ssize_t 4390 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4391 char *buf) 4392 { 4393 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4394 return sysfs_emit(buf, "%d\n", session->target_id); 4395 } 4396 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4397 show_priv_session_target_id, NULL); 4398 4399 #define iscsi_priv_session_attr_show(field, format) \ 4400 static ssize_t \ 4401 show_priv_session_##field(struct device *dev, \ 4402 struct device_attribute *attr, char *buf) \ 4403 { \ 4404 struct iscsi_cls_session *session = \ 4405 iscsi_dev_to_session(dev->parent); \ 4406 if (session->field == -1) \ 4407 return sysfs_emit(buf, "off\n"); \ 4408 return sysfs_emit(buf, format"\n", session->field); \ 4409 } 4410 4411 #define iscsi_priv_session_attr_store(field) \ 4412 static ssize_t \ 4413 store_priv_session_##field(struct device *dev, \ 4414 struct device_attribute *attr, \ 4415 const char *buf, size_t count) \ 4416 { \ 4417 int val; \ 4418 char *cp; \ 4419 struct iscsi_cls_session *session = \ 4420 iscsi_dev_to_session(dev->parent); \ 4421 if ((session->state == ISCSI_SESSION_FREE) || \ 4422 (session->state == ISCSI_SESSION_FAILED)) \ 4423 return -EBUSY; \ 4424 if (strncmp(buf, "off", 3) == 0) { \ 4425 session->field = -1; \ 4426 session->field##_sysfs_override = true; \ 4427 } else { \ 4428 val = simple_strtoul(buf, &cp, 0); \ 4429 if (*cp != '\0' && *cp != '\n') \ 4430 return -EINVAL; \ 4431 session->field = val; \ 4432 session->field##_sysfs_override = true; \ 4433 } \ 4434 return count; \ 4435 } 4436 4437 #define iscsi_priv_session_rw_attr(field, format) \ 4438 iscsi_priv_session_attr_show(field, format) \ 4439 iscsi_priv_session_attr_store(field) \ 4440 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4441 show_priv_session_##field, \ 4442 store_priv_session_##field) 4443 4444 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4445 4446 static struct attribute *iscsi_session_attrs[] = { 4447 &dev_attr_sess_initial_r2t.attr, 4448 &dev_attr_sess_max_outstanding_r2t.attr, 4449 &dev_attr_sess_immediate_data.attr, 4450 &dev_attr_sess_first_burst_len.attr, 4451 &dev_attr_sess_max_burst_len.attr, 4452 &dev_attr_sess_data_pdu_in_order.attr, 4453 &dev_attr_sess_data_seq_in_order.attr, 4454 &dev_attr_sess_erl.attr, 4455 &dev_attr_sess_targetname.attr, 4456 &dev_attr_sess_tpgt.attr, 4457 &dev_attr_sess_password.attr, 4458 &dev_attr_sess_password_in.attr, 4459 &dev_attr_sess_username.attr, 4460 &dev_attr_sess_username_in.attr, 4461 &dev_attr_sess_fast_abort.attr, 4462 &dev_attr_sess_abort_tmo.attr, 4463 &dev_attr_sess_lu_reset_tmo.attr, 4464 &dev_attr_sess_tgt_reset_tmo.attr, 4465 &dev_attr_sess_ifacename.attr, 4466 &dev_attr_sess_initiatorname.attr, 4467 &dev_attr_sess_targetalias.attr, 4468 &dev_attr_sess_boot_root.attr, 4469 &dev_attr_sess_boot_nic.attr, 4470 &dev_attr_sess_boot_target.attr, 4471 &dev_attr_priv_sess_recovery_tmo.attr, 4472 &dev_attr_priv_sess_state.attr, 4473 &dev_attr_priv_sess_creator.attr, 4474 &dev_attr_sess_chap_out_idx.attr, 4475 &dev_attr_sess_chap_in_idx.attr, 4476 &dev_attr_priv_sess_target_id.attr, 4477 &dev_attr_sess_auto_snd_tgt_disable.attr, 4478 &dev_attr_sess_discovery_session.attr, 4479 &dev_attr_sess_portal_type.attr, 4480 &dev_attr_sess_chap_auth.attr, 4481 &dev_attr_sess_discovery_logout.attr, 4482 &dev_attr_sess_bidi_chap.attr, 4483 &dev_attr_sess_discovery_auth_optional.attr, 4484 &dev_attr_sess_def_time2wait.attr, 4485 &dev_attr_sess_def_time2retain.attr, 4486 &dev_attr_sess_isid.attr, 4487 &dev_attr_sess_tsid.attr, 4488 &dev_attr_sess_def_taskmgmt_tmo.attr, 4489 &dev_attr_sess_discovery_parent_idx.attr, 4490 &dev_attr_sess_discovery_parent_type.attr, 4491 NULL, 4492 }; 4493 4494 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4495 struct attribute *attr, int i) 4496 { 4497 struct device *cdev = container_of(kobj, struct device, kobj); 4498 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4499 struct iscsi_transport *t = session->transport; 4500 int param; 4501 4502 if (attr == &dev_attr_sess_initial_r2t.attr) 4503 param = ISCSI_PARAM_INITIAL_R2T_EN; 4504 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4505 param = ISCSI_PARAM_MAX_R2T; 4506 else if (attr == &dev_attr_sess_immediate_data.attr) 4507 param = ISCSI_PARAM_IMM_DATA_EN; 4508 else if (attr == &dev_attr_sess_first_burst_len.attr) 4509 param = ISCSI_PARAM_FIRST_BURST; 4510 else if (attr == &dev_attr_sess_max_burst_len.attr) 4511 param = ISCSI_PARAM_MAX_BURST; 4512 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4513 param = ISCSI_PARAM_PDU_INORDER_EN; 4514 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4515 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4516 else if (attr == &dev_attr_sess_erl.attr) 4517 param = ISCSI_PARAM_ERL; 4518 else if (attr == &dev_attr_sess_targetname.attr) 4519 param = ISCSI_PARAM_TARGET_NAME; 4520 else if (attr == &dev_attr_sess_tpgt.attr) 4521 param = ISCSI_PARAM_TPGT; 4522 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4523 param = ISCSI_PARAM_CHAP_IN_IDX; 4524 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4525 param = ISCSI_PARAM_CHAP_OUT_IDX; 4526 else if (attr == &dev_attr_sess_password.attr) 4527 param = ISCSI_PARAM_USERNAME; 4528 else if (attr == &dev_attr_sess_password_in.attr) 4529 param = ISCSI_PARAM_USERNAME_IN; 4530 else if (attr == &dev_attr_sess_username.attr) 4531 param = ISCSI_PARAM_PASSWORD; 4532 else if (attr == &dev_attr_sess_username_in.attr) 4533 param = ISCSI_PARAM_PASSWORD_IN; 4534 else if (attr == &dev_attr_sess_fast_abort.attr) 4535 param = ISCSI_PARAM_FAST_ABORT; 4536 else if (attr == &dev_attr_sess_abort_tmo.attr) 4537 param = ISCSI_PARAM_ABORT_TMO; 4538 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4539 param = ISCSI_PARAM_LU_RESET_TMO; 4540 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4541 param = ISCSI_PARAM_TGT_RESET_TMO; 4542 else if (attr == &dev_attr_sess_ifacename.attr) 4543 param = ISCSI_PARAM_IFACE_NAME; 4544 else if (attr == &dev_attr_sess_initiatorname.attr) 4545 param = ISCSI_PARAM_INITIATOR_NAME; 4546 else if (attr == &dev_attr_sess_targetalias.attr) 4547 param = ISCSI_PARAM_TARGET_ALIAS; 4548 else if (attr == &dev_attr_sess_boot_root.attr) 4549 param = ISCSI_PARAM_BOOT_ROOT; 4550 else if (attr == &dev_attr_sess_boot_nic.attr) 4551 param = ISCSI_PARAM_BOOT_NIC; 4552 else if (attr == &dev_attr_sess_boot_target.attr) 4553 param = ISCSI_PARAM_BOOT_TARGET; 4554 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4555 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4556 else if (attr == &dev_attr_sess_discovery_session.attr) 4557 param = ISCSI_PARAM_DISCOVERY_SESS; 4558 else if (attr == &dev_attr_sess_portal_type.attr) 4559 param = ISCSI_PARAM_PORTAL_TYPE; 4560 else if (attr == &dev_attr_sess_chap_auth.attr) 4561 param = ISCSI_PARAM_CHAP_AUTH_EN; 4562 else if (attr == &dev_attr_sess_discovery_logout.attr) 4563 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4564 else if (attr == &dev_attr_sess_bidi_chap.attr) 4565 param = ISCSI_PARAM_BIDI_CHAP_EN; 4566 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4567 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4568 else if (attr == &dev_attr_sess_def_time2wait.attr) 4569 param = ISCSI_PARAM_DEF_TIME2WAIT; 4570 else if (attr == &dev_attr_sess_def_time2retain.attr) 4571 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4572 else if (attr == &dev_attr_sess_isid.attr) 4573 param = ISCSI_PARAM_ISID; 4574 else if (attr == &dev_attr_sess_tsid.attr) 4575 param = ISCSI_PARAM_TSID; 4576 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4577 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4578 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4579 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4580 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4581 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4582 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4583 return S_IRUGO | S_IWUSR; 4584 else if (attr == &dev_attr_priv_sess_state.attr) 4585 return S_IRUGO; 4586 else if (attr == &dev_attr_priv_sess_creator.attr) 4587 return S_IRUGO; 4588 else if (attr == &dev_attr_priv_sess_target_id.attr) 4589 return S_IRUGO; 4590 else { 4591 WARN_ONCE(1, "Invalid session attr"); 4592 return 0; 4593 } 4594 4595 return t->attr_is_visible(ISCSI_PARAM, param); 4596 } 4597 4598 static struct attribute_group iscsi_session_group = { 4599 .attrs = iscsi_session_attrs, 4600 .is_visible = iscsi_session_attr_is_visible, 4601 }; 4602 4603 /* 4604 * iSCSI host attrs 4605 */ 4606 #define iscsi_host_attr_show(param) \ 4607 static ssize_t \ 4608 show_host_param_##param(struct device *dev, \ 4609 struct device_attribute *attr, char *buf) \ 4610 { \ 4611 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4612 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4613 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4614 } 4615 4616 #define iscsi_host_attr(field, param) \ 4617 iscsi_host_attr_show(param) \ 4618 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4619 NULL); 4620 4621 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4622 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4623 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4624 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4625 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4626 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4627 4628 static struct attribute *iscsi_host_attrs[] = { 4629 &dev_attr_host_netdev.attr, 4630 &dev_attr_host_hwaddress.attr, 4631 &dev_attr_host_ipaddress.attr, 4632 &dev_attr_host_initiatorname.attr, 4633 &dev_attr_host_port_state.attr, 4634 &dev_attr_host_port_speed.attr, 4635 NULL, 4636 }; 4637 4638 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4639 struct attribute *attr, int i) 4640 { 4641 struct device *cdev = container_of(kobj, struct device, kobj); 4642 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4643 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4644 int param; 4645 4646 if (attr == &dev_attr_host_netdev.attr) 4647 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4648 else if (attr == &dev_attr_host_hwaddress.attr) 4649 param = ISCSI_HOST_PARAM_HWADDRESS; 4650 else if (attr == &dev_attr_host_ipaddress.attr) 4651 param = ISCSI_HOST_PARAM_IPADDRESS; 4652 else if (attr == &dev_attr_host_initiatorname.attr) 4653 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4654 else if (attr == &dev_attr_host_port_state.attr) 4655 param = ISCSI_HOST_PARAM_PORT_STATE; 4656 else if (attr == &dev_attr_host_port_speed.attr) 4657 param = ISCSI_HOST_PARAM_PORT_SPEED; 4658 else { 4659 WARN_ONCE(1, "Invalid host attr"); 4660 return 0; 4661 } 4662 4663 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4664 } 4665 4666 static struct attribute_group iscsi_host_group = { 4667 .attrs = iscsi_host_attrs, 4668 .is_visible = iscsi_host_attr_is_visible, 4669 }; 4670 4671 /* convert iscsi_port_speed values to ascii string name */ 4672 static const struct { 4673 enum iscsi_port_speed value; 4674 char *name; 4675 } iscsi_port_speed_names[] = { 4676 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4677 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4678 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4679 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4680 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4681 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4682 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4683 }; 4684 4685 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4686 { 4687 int i; 4688 char *speed = "Unknown!"; 4689 struct iscsi_cls_host *ihost = shost->shost_data; 4690 uint32_t port_speed = ihost->port_speed; 4691 4692 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4693 if (iscsi_port_speed_names[i].value & port_speed) { 4694 speed = iscsi_port_speed_names[i].name; 4695 break; 4696 } 4697 } 4698 return speed; 4699 } 4700 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4701 4702 /* convert iscsi_port_state values to ascii string name */ 4703 static const struct { 4704 enum iscsi_port_state value; 4705 char *name; 4706 } iscsi_port_state_names[] = { 4707 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4708 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4709 }; 4710 4711 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4712 { 4713 int i; 4714 char *state = "Unknown!"; 4715 struct iscsi_cls_host *ihost = shost->shost_data; 4716 uint32_t port_state = ihost->port_state; 4717 4718 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4719 if (iscsi_port_state_names[i].value & port_state) { 4720 state = iscsi_port_state_names[i].name; 4721 break; 4722 } 4723 } 4724 return state; 4725 } 4726 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4727 4728 static int iscsi_session_match(struct attribute_container *cont, 4729 struct device *dev) 4730 { 4731 struct iscsi_cls_session *session; 4732 struct Scsi_Host *shost; 4733 struct iscsi_internal *priv; 4734 4735 if (!iscsi_is_session_dev(dev)) 4736 return 0; 4737 4738 session = iscsi_dev_to_session(dev); 4739 shost = iscsi_session_to_shost(session); 4740 if (!shost->transportt) 4741 return 0; 4742 4743 priv = to_iscsi_internal(shost->transportt); 4744 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4745 return 0; 4746 4747 return &priv->session_cont.ac == cont; 4748 } 4749 4750 static int iscsi_conn_match(struct attribute_container *cont, 4751 struct device *dev) 4752 { 4753 struct iscsi_cls_session *session; 4754 struct iscsi_cls_conn *conn; 4755 struct Scsi_Host *shost; 4756 struct iscsi_internal *priv; 4757 4758 if (!iscsi_is_conn_dev(dev)) 4759 return 0; 4760 4761 conn = iscsi_dev_to_conn(dev); 4762 session = iscsi_dev_to_session(conn->dev.parent); 4763 shost = iscsi_session_to_shost(session); 4764 4765 if (!shost->transportt) 4766 return 0; 4767 4768 priv = to_iscsi_internal(shost->transportt); 4769 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4770 return 0; 4771 4772 return &priv->conn_cont.ac == cont; 4773 } 4774 4775 static int iscsi_host_match(struct attribute_container *cont, 4776 struct device *dev) 4777 { 4778 struct Scsi_Host *shost; 4779 struct iscsi_internal *priv; 4780 4781 if (!scsi_is_host_device(dev)) 4782 return 0; 4783 4784 shost = dev_to_shost(dev); 4785 if (!shost->transportt || 4786 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4787 return 0; 4788 4789 priv = to_iscsi_internal(shost->transportt); 4790 return &priv->t.host_attrs.ac == cont; 4791 } 4792 4793 struct scsi_transport_template * 4794 iscsi_register_transport(struct iscsi_transport *tt) 4795 { 4796 struct iscsi_internal *priv; 4797 unsigned long flags; 4798 int err; 4799 4800 BUG_ON(!tt); 4801 WARN_ON(tt->ep_disconnect && !tt->unbind_conn); 4802 4803 priv = iscsi_if_transport_lookup(tt); 4804 if (priv) 4805 return NULL; 4806 4807 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4808 if (!priv) 4809 return NULL; 4810 INIT_LIST_HEAD(&priv->list); 4811 priv->iscsi_transport = tt; 4812 priv->t.user_scan = iscsi_user_scan; 4813 4814 priv->dev.class = &iscsi_transport_class; 4815 dev_set_name(&priv->dev, "%s", tt->name); 4816 err = device_register(&priv->dev); 4817 if (err) 4818 goto free_priv; 4819 4820 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4821 if (err) 4822 goto unregister_dev; 4823 4824 /* host parameters */ 4825 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4826 priv->t.host_attrs.ac.match = iscsi_host_match; 4827 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4828 priv->t.host_size = sizeof(struct iscsi_cls_host); 4829 transport_container_register(&priv->t.host_attrs); 4830 4831 /* connection parameters */ 4832 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4833 priv->conn_cont.ac.match = iscsi_conn_match; 4834 priv->conn_cont.ac.grp = &iscsi_conn_group; 4835 transport_container_register(&priv->conn_cont); 4836 4837 /* session parameters */ 4838 priv->session_cont.ac.class = &iscsi_session_class.class; 4839 priv->session_cont.ac.match = iscsi_session_match; 4840 priv->session_cont.ac.grp = &iscsi_session_group; 4841 transport_container_register(&priv->session_cont); 4842 4843 spin_lock_irqsave(&iscsi_transport_lock, flags); 4844 list_add(&priv->list, &iscsi_transports); 4845 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4846 4847 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4848 return &priv->t; 4849 4850 unregister_dev: 4851 device_unregister(&priv->dev); 4852 return NULL; 4853 free_priv: 4854 kfree(priv); 4855 return NULL; 4856 } 4857 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4858 4859 void iscsi_unregister_transport(struct iscsi_transport *tt) 4860 { 4861 struct iscsi_internal *priv; 4862 unsigned long flags; 4863 4864 BUG_ON(!tt); 4865 4866 mutex_lock(&rx_queue_mutex); 4867 4868 priv = iscsi_if_transport_lookup(tt); 4869 BUG_ON (!priv); 4870 4871 spin_lock_irqsave(&iscsi_transport_lock, flags); 4872 list_del(&priv->list); 4873 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4874 4875 transport_container_unregister(&priv->conn_cont); 4876 transport_container_unregister(&priv->session_cont); 4877 transport_container_unregister(&priv->t.host_attrs); 4878 4879 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4880 device_unregister(&priv->dev); 4881 mutex_unlock(&rx_queue_mutex); 4882 } 4883 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4884 4885 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4886 struct device *dev, const char *fmt, ...) 4887 { 4888 struct va_format vaf; 4889 va_list args; 4890 4891 va_start(args, fmt); 4892 vaf.fmt = fmt; 4893 vaf.va = &args; 4894 trace(dev, &vaf); 4895 va_end(args); 4896 } 4897 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4898 4899 static __init int iscsi_transport_init(void) 4900 { 4901 int err; 4902 struct netlink_kernel_cfg cfg = { 4903 .groups = 1, 4904 .input = iscsi_if_rx, 4905 }; 4906 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4907 ISCSI_TRANSPORT_VERSION); 4908 4909 atomic_set(&iscsi_session_nr, 0); 4910 4911 err = class_register(&iscsi_transport_class); 4912 if (err) 4913 return err; 4914 4915 err = class_register(&iscsi_endpoint_class); 4916 if (err) 4917 goto unregister_transport_class; 4918 4919 err = class_register(&iscsi_iface_class); 4920 if (err) 4921 goto unregister_endpoint_class; 4922 4923 err = transport_class_register(&iscsi_host_class); 4924 if (err) 4925 goto unregister_iface_class; 4926 4927 err = transport_class_register(&iscsi_connection_class); 4928 if (err) 4929 goto unregister_host_class; 4930 4931 err = transport_class_register(&iscsi_session_class); 4932 if (err) 4933 goto unregister_conn_class; 4934 4935 err = bus_register(&iscsi_flashnode_bus); 4936 if (err) 4937 goto unregister_session_class; 4938 4939 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4940 if (!nls) { 4941 err = -ENOBUFS; 4942 goto unregister_flashnode_bus; 4943 } 4944 4945 iscsi_conn_cleanup_workq = alloc_workqueue("%s", 4946 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 4947 "iscsi_conn_cleanup"); 4948 if (!iscsi_conn_cleanup_workq) { 4949 err = -ENOMEM; 4950 goto release_nls; 4951 } 4952 4953 return 0; 4954 4955 release_nls: 4956 netlink_kernel_release(nls); 4957 unregister_flashnode_bus: 4958 bus_unregister(&iscsi_flashnode_bus); 4959 unregister_session_class: 4960 transport_class_unregister(&iscsi_session_class); 4961 unregister_conn_class: 4962 transport_class_unregister(&iscsi_connection_class); 4963 unregister_host_class: 4964 transport_class_unregister(&iscsi_host_class); 4965 unregister_iface_class: 4966 class_unregister(&iscsi_iface_class); 4967 unregister_endpoint_class: 4968 class_unregister(&iscsi_endpoint_class); 4969 unregister_transport_class: 4970 class_unregister(&iscsi_transport_class); 4971 return err; 4972 } 4973 4974 static void __exit iscsi_transport_exit(void) 4975 { 4976 destroy_workqueue(iscsi_conn_cleanup_workq); 4977 netlink_kernel_release(nls); 4978 bus_unregister(&iscsi_flashnode_bus); 4979 transport_class_unregister(&iscsi_connection_class); 4980 transport_class_unregister(&iscsi_session_class); 4981 transport_class_unregister(&iscsi_host_class); 4982 class_unregister(&iscsi_endpoint_class); 4983 class_unregister(&iscsi_iface_class); 4984 class_unregister(&iscsi_transport_class); 4985 } 4986 4987 module_init(iscsi_transport_init); 4988 module_exit(iscsi_transport_exit); 4989 4990 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4991 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4992 "Alex Aizman <itn780@yahoo.com>"); 4993 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4994 MODULE_LICENSE("GPL"); 4995 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4996 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4997