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 put_dev; 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 put_dev: 249 mutex_lock(&iscsi_ep_idr_mutex); 250 idr_remove(&iscsi_ep_idr, id); 251 mutex_unlock(&iscsi_ep_idr_mutex); 252 put_device(&ep->dev); 253 return NULL; 254 free_ep: 255 kfree(ep); 256 return NULL; 257 } 258 EXPORT_SYMBOL_GPL(iscsi_create_endpoint); 259 260 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) 261 { 262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); 263 device_unregister(&ep->dev); 264 } 265 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); 266 267 void iscsi_put_endpoint(struct iscsi_endpoint *ep) 268 { 269 put_device(&ep->dev); 270 } 271 EXPORT_SYMBOL_GPL(iscsi_put_endpoint); 272 273 /** 274 * iscsi_lookup_endpoint - get ep from handle 275 * @handle: endpoint handle 276 * 277 * Caller must do a iscsi_put_endpoint. 278 */ 279 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 280 { 281 struct iscsi_endpoint *ep; 282 283 mutex_lock(&iscsi_ep_idr_mutex); 284 ep = idr_find(&iscsi_ep_idr, handle); 285 if (!ep) 286 goto unlock; 287 288 get_device(&ep->dev); 289 unlock: 290 mutex_unlock(&iscsi_ep_idr_mutex); 291 return ep; 292 } 293 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 294 295 /* 296 * Interface to display network param to sysfs 297 */ 298 299 static void iscsi_iface_release(struct device *dev) 300 { 301 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 302 struct device *parent = iface->dev.parent; 303 304 kfree(iface); 305 put_device(parent); 306 } 307 308 309 static struct class iscsi_iface_class = { 310 .name = "iscsi_iface", 311 .dev_release = iscsi_iface_release, 312 }; 313 314 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 315 struct device_attribute dev_attr_##_prefix##_##_name = \ 316 __ATTR(_name, _mode, _show, _store) 317 318 /* iface attrs show */ 319 #define iscsi_iface_attr_show(type, name, param_type, param) \ 320 static ssize_t \ 321 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 322 char *buf) \ 323 { \ 324 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 325 struct iscsi_transport *t = iface->transport; \ 326 return t->get_iface_param(iface, param_type, param, buf); \ 327 } \ 328 329 #define iscsi_iface_net_attr(type, name, param) \ 330 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 331 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 332 333 #define iscsi_iface_attr(type, name, param) \ 334 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 335 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 336 337 /* generic read only ipv4 attribute */ 338 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 339 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 340 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 341 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 342 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 343 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 344 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 345 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 346 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 347 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 348 iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 349 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 350 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 351 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 352 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 353 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 354 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 355 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 356 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 357 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 358 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 359 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 360 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 361 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 362 iscsi_iface_net_attr(ipv4_iface, fragment_disable, 363 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 364 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 365 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 366 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 367 368 /* generic read only ipv6 attribute */ 369 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 370 iscsi_iface_net_attr(ipv6_iface, link_local_addr, 371 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 372 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 373 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 374 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 375 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 376 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 377 iscsi_iface_net_attr(ipv6_iface, link_local_state, 378 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 379 iscsi_iface_net_attr(ipv6_iface, router_state, 380 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 381 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 382 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 383 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 384 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 385 iscsi_iface_net_attr(ipv6_iface, traffic_class, 386 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 387 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 388 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 389 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 390 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 391 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 392 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 393 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 394 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 395 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 396 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 397 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 398 399 /* common read only iface attribute */ 400 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 401 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 402 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 403 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 404 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 405 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 406 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 407 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 408 iscsi_iface_net_attr(iface, tcp_nagle_disable, 409 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 410 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 411 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 412 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 413 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 414 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 415 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 416 417 /* common iscsi specific settings attributes */ 418 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 419 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 420 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 421 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 422 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 423 iscsi_iface_attr(iface, data_seq_in_order, 424 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 425 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 426 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 427 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 428 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 429 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 430 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 431 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 432 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 433 iscsi_iface_attr(iface, discovery_auth_optional, 434 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 435 iscsi_iface_attr(iface, discovery_logout, 436 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 437 iscsi_iface_attr(iface, strict_login_comp_en, 438 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 439 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 440 441 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 442 struct attribute *attr, int i) 443 { 444 struct device *dev = container_of(kobj, struct device, kobj); 445 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 446 struct iscsi_transport *t = iface->transport; 447 int param = -1; 448 449 if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 450 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 451 else if (attr == &dev_attr_iface_header_digest.attr) 452 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 453 else if (attr == &dev_attr_iface_data_digest.attr) 454 param = ISCSI_IFACE_PARAM_DATADGST_EN; 455 else if (attr == &dev_attr_iface_immediate_data.attr) 456 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 457 else if (attr == &dev_attr_iface_initial_r2t.attr) 458 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 459 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 460 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 461 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 462 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 463 else if (attr == &dev_attr_iface_erl.attr) 464 param = ISCSI_IFACE_PARAM_ERL; 465 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 466 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 467 else if (attr == &dev_attr_iface_first_burst_len.attr) 468 param = ISCSI_IFACE_PARAM_FIRST_BURST; 469 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 470 param = ISCSI_IFACE_PARAM_MAX_R2T; 471 else if (attr == &dev_attr_iface_max_burst_len.attr) 472 param = ISCSI_IFACE_PARAM_MAX_BURST; 473 else if (attr == &dev_attr_iface_chap_auth.attr) 474 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 475 else if (attr == &dev_attr_iface_bidi_chap.attr) 476 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 477 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 478 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 479 else if (attr == &dev_attr_iface_discovery_logout.attr) 480 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 481 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 482 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 483 else if (attr == &dev_attr_iface_initiator_name.attr) 484 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 485 486 if (param != -1) 487 return t->attr_is_visible(ISCSI_IFACE_PARAM, param); 488 489 if (attr == &dev_attr_iface_enabled.attr) 490 param = ISCSI_NET_PARAM_IFACE_ENABLE; 491 else if (attr == &dev_attr_iface_vlan_id.attr) 492 param = ISCSI_NET_PARAM_VLAN_ID; 493 else if (attr == &dev_attr_iface_vlan_priority.attr) 494 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 495 else if (attr == &dev_attr_iface_vlan_enabled.attr) 496 param = ISCSI_NET_PARAM_VLAN_ENABLED; 497 else if (attr == &dev_attr_iface_mtu.attr) 498 param = ISCSI_NET_PARAM_MTU; 499 else if (attr == &dev_attr_iface_port.attr) 500 param = ISCSI_NET_PARAM_PORT; 501 else if (attr == &dev_attr_iface_ipaddress_state.attr) 502 param = ISCSI_NET_PARAM_IPADDR_STATE; 503 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 504 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 505 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 506 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 507 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 508 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 509 else if (attr == &dev_attr_iface_tcp_wsf.attr) 510 param = ISCSI_NET_PARAM_TCP_WSF; 511 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 512 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 513 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 514 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 515 else if (attr == &dev_attr_iface_cache_id.attr) 516 param = ISCSI_NET_PARAM_CACHE_ID; 517 else if (attr == &dev_attr_iface_redirect_en.attr) 518 param = ISCSI_NET_PARAM_REDIRECT_EN; 519 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 520 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 521 param = ISCSI_NET_PARAM_IPV4_ADDR; 522 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 523 param = ISCSI_NET_PARAM_IPV4_GW; 524 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 525 param = ISCSI_NET_PARAM_IPV4_SUBNET; 526 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 527 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 528 else if (attr == 529 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 530 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 531 else if (attr == 532 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 533 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 534 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 535 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 536 else if (attr == &dev_attr_ipv4_iface_tos.attr) 537 param = ISCSI_NET_PARAM_IPV4_TOS; 538 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 539 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 540 else if (attr == 541 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 542 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 543 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 544 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 545 else if (attr == 546 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 547 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 548 else if (attr == 549 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 550 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 551 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 552 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 553 else if (attr == 554 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 555 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 556 else if (attr == 557 &dev_attr_ipv4_iface_fragment_disable.attr) 558 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 559 else if (attr == 560 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 561 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 562 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 563 param = ISCSI_NET_PARAM_IPV4_TTL; 564 else 565 return 0; 566 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 567 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 568 param = ISCSI_NET_PARAM_IPV6_ADDR; 569 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 570 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 571 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 572 param = ISCSI_NET_PARAM_IPV6_ROUTER; 573 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 574 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 575 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 576 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 577 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 578 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 579 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 580 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 581 else if (attr == 582 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 583 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 584 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 585 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 586 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 587 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 588 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 589 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 590 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 591 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 592 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 593 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 594 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 595 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 596 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 597 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 598 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 599 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 600 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 601 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 602 else 603 return 0; 604 } else { 605 WARN_ONCE(1, "Invalid iface attr"); 606 return 0; 607 } 608 609 return t->attr_is_visible(ISCSI_NET_PARAM, param); 610 } 611 612 static struct attribute *iscsi_iface_attrs[] = { 613 &dev_attr_iface_enabled.attr, 614 &dev_attr_iface_vlan_id.attr, 615 &dev_attr_iface_vlan_priority.attr, 616 &dev_attr_iface_vlan_enabled.attr, 617 &dev_attr_ipv4_iface_ipaddress.attr, 618 &dev_attr_ipv4_iface_gateway.attr, 619 &dev_attr_ipv4_iface_subnet.attr, 620 &dev_attr_ipv4_iface_bootproto.attr, 621 &dev_attr_ipv6_iface_ipaddress.attr, 622 &dev_attr_ipv6_iface_link_local_addr.attr, 623 &dev_attr_ipv6_iface_router_addr.attr, 624 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 625 &dev_attr_ipv6_iface_link_local_autocfg.attr, 626 &dev_attr_iface_mtu.attr, 627 &dev_attr_iface_port.attr, 628 &dev_attr_iface_ipaddress_state.attr, 629 &dev_attr_iface_delayed_ack_en.attr, 630 &dev_attr_iface_tcp_nagle_disable.attr, 631 &dev_attr_iface_tcp_wsf_disable.attr, 632 &dev_attr_iface_tcp_wsf.attr, 633 &dev_attr_iface_tcp_timer_scale.attr, 634 &dev_attr_iface_tcp_timestamp_en.attr, 635 &dev_attr_iface_cache_id.attr, 636 &dev_attr_iface_redirect_en.attr, 637 &dev_attr_iface_def_taskmgmt_tmo.attr, 638 &dev_attr_iface_header_digest.attr, 639 &dev_attr_iface_data_digest.attr, 640 &dev_attr_iface_immediate_data.attr, 641 &dev_attr_iface_initial_r2t.attr, 642 &dev_attr_iface_data_seq_in_order.attr, 643 &dev_attr_iface_data_pdu_in_order.attr, 644 &dev_attr_iface_erl.attr, 645 &dev_attr_iface_max_recv_dlength.attr, 646 &dev_attr_iface_first_burst_len.attr, 647 &dev_attr_iface_max_outstanding_r2t.attr, 648 &dev_attr_iface_max_burst_len.attr, 649 &dev_attr_iface_chap_auth.attr, 650 &dev_attr_iface_bidi_chap.attr, 651 &dev_attr_iface_discovery_auth_optional.attr, 652 &dev_attr_iface_discovery_logout.attr, 653 &dev_attr_iface_strict_login_comp_en.attr, 654 &dev_attr_iface_initiator_name.attr, 655 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 656 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 657 &dev_attr_ipv4_iface_tos_en.attr, 658 &dev_attr_ipv4_iface_tos.attr, 659 &dev_attr_ipv4_iface_grat_arp_en.attr, 660 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 661 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 662 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 663 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 664 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 665 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 666 &dev_attr_ipv4_iface_fragment_disable.attr, 667 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 668 &dev_attr_ipv4_iface_ttl.attr, 669 &dev_attr_ipv6_iface_link_local_state.attr, 670 &dev_attr_ipv6_iface_router_state.attr, 671 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 672 &dev_attr_ipv6_iface_mld_en.attr, 673 &dev_attr_ipv6_iface_flow_label.attr, 674 &dev_attr_ipv6_iface_traffic_class.attr, 675 &dev_attr_ipv6_iface_hop_limit.attr, 676 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 677 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 678 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 679 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 680 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 681 NULL, 682 }; 683 684 static struct attribute_group iscsi_iface_group = { 685 .attrs = iscsi_iface_attrs, 686 .is_visible = iscsi_iface_attr_is_visible, 687 }; 688 689 /* convert iscsi_ipaddress_state values to ascii string name */ 690 static const struct { 691 enum iscsi_ipaddress_state value; 692 char *name; 693 } iscsi_ipaddress_state_names[] = { 694 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 695 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 696 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 697 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 698 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 699 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 700 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 701 }; 702 703 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 704 { 705 int i; 706 char *state = NULL; 707 708 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 709 if (iscsi_ipaddress_state_names[i].value == port_state) { 710 state = iscsi_ipaddress_state_names[i].name; 711 break; 712 } 713 } 714 return state; 715 } 716 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 717 718 /* convert iscsi_router_state values to ascii string name */ 719 static const struct { 720 enum iscsi_router_state value; 721 char *name; 722 } iscsi_router_state_names[] = { 723 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 724 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 725 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 726 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 727 }; 728 729 char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 730 { 731 int i; 732 char *state = NULL; 733 734 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 735 if (iscsi_router_state_names[i].value == router_state) { 736 state = iscsi_router_state_names[i].name; 737 break; 738 } 739 } 740 return state; 741 } 742 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 743 744 struct iscsi_iface * 745 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 746 uint32_t iface_type, uint32_t iface_num, int dd_size) 747 { 748 struct iscsi_iface *iface; 749 int err; 750 751 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 752 if (!iface) 753 return NULL; 754 755 iface->transport = transport; 756 iface->iface_type = iface_type; 757 iface->iface_num = iface_num; 758 iface->dev.release = iscsi_iface_release; 759 iface->dev.class = &iscsi_iface_class; 760 /* parent reference released in iscsi_iface_release */ 761 iface->dev.parent = get_device(&shost->shost_gendev); 762 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 763 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 764 iface_num); 765 else 766 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 767 iface_num); 768 769 err = device_register(&iface->dev); 770 if (err) 771 goto put_dev; 772 773 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 774 if (err) 775 goto unreg_iface; 776 777 if (dd_size) 778 iface->dd_data = &iface[1]; 779 return iface; 780 781 unreg_iface: 782 device_unregister(&iface->dev); 783 return NULL; 784 785 put_dev: 786 put_device(&iface->dev); 787 return NULL; 788 } 789 EXPORT_SYMBOL_GPL(iscsi_create_iface); 790 791 void iscsi_destroy_iface(struct iscsi_iface *iface) 792 { 793 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 794 device_unregister(&iface->dev); 795 } 796 EXPORT_SYMBOL_GPL(iscsi_destroy_iface); 797 798 /* 799 * Interface to display flash node params to sysfs 800 */ 801 802 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ 803 struct device_attribute dev_attr_##_prefix##_##_name = \ 804 __ATTR(_name, _mode, _show, _store) 805 806 /* flash node session attrs show */ 807 #define iscsi_flashnode_sess_attr_show(type, name, param) \ 808 static ssize_t \ 809 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 810 char *buf) \ 811 { \ 812 struct iscsi_bus_flash_session *fnode_sess = \ 813 iscsi_dev_to_flash_session(dev);\ 814 struct iscsi_transport *t = fnode_sess->transport; \ 815 return t->get_flashnode_param(fnode_sess, param, buf); \ 816 } \ 817 818 819 #define iscsi_flashnode_sess_attr(type, name, param) \ 820 iscsi_flashnode_sess_attr_show(type, name, param) \ 821 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 822 show_##type##_##name, NULL); 823 824 /* Flash node session attributes */ 825 826 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 827 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 828 iscsi_flashnode_sess_attr(fnode, discovery_session, 829 ISCSI_FLASHNODE_DISCOVERY_SESS); 830 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 831 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 832 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 833 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 834 iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 835 ISCSI_FLASHNODE_DATASEQ_INORDER); 836 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 837 ISCSI_FLASHNODE_PDU_INORDER); 838 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 839 iscsi_flashnode_sess_attr(fnode, discovery_logout, 840 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 841 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 842 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 843 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 844 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 845 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 846 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 847 iscsi_flashnode_sess_attr(fnode, def_time2retain, 848 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 849 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 850 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 851 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 852 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 853 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 854 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 855 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 856 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 857 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 858 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 859 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 860 iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 861 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 862 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 863 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 864 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 865 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 866 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 867 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 868 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 869 870 static struct attribute *iscsi_flashnode_sess_attrs[] = { 871 &dev_attr_fnode_auto_snd_tgt_disable.attr, 872 &dev_attr_fnode_discovery_session.attr, 873 &dev_attr_fnode_portal_type.attr, 874 &dev_attr_fnode_entry_enable.attr, 875 &dev_attr_fnode_immediate_data.attr, 876 &dev_attr_fnode_initial_r2t.attr, 877 &dev_attr_fnode_data_seq_in_order.attr, 878 &dev_attr_fnode_data_pdu_in_order.attr, 879 &dev_attr_fnode_chap_auth.attr, 880 &dev_attr_fnode_discovery_logout.attr, 881 &dev_attr_fnode_bidi_chap.attr, 882 &dev_attr_fnode_discovery_auth_optional.attr, 883 &dev_attr_fnode_erl.attr, 884 &dev_attr_fnode_first_burst_len.attr, 885 &dev_attr_fnode_def_time2wait.attr, 886 &dev_attr_fnode_def_time2retain.attr, 887 &dev_attr_fnode_max_outstanding_r2t.attr, 888 &dev_attr_fnode_isid.attr, 889 &dev_attr_fnode_tsid.attr, 890 &dev_attr_fnode_max_burst_len.attr, 891 &dev_attr_fnode_def_taskmgmt_tmo.attr, 892 &dev_attr_fnode_targetalias.attr, 893 &dev_attr_fnode_targetname.attr, 894 &dev_attr_fnode_tpgt.attr, 895 &dev_attr_fnode_discovery_parent_idx.attr, 896 &dev_attr_fnode_discovery_parent_type.attr, 897 &dev_attr_fnode_chap_in_idx.attr, 898 &dev_attr_fnode_chap_out_idx.attr, 899 &dev_attr_fnode_username.attr, 900 &dev_attr_fnode_username_in.attr, 901 &dev_attr_fnode_password.attr, 902 &dev_attr_fnode_password_in.attr, 903 &dev_attr_fnode_is_boot_target.attr, 904 NULL, 905 }; 906 907 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, 908 struct attribute *attr, 909 int i) 910 { 911 struct device *dev = container_of(kobj, struct device, kobj); 912 struct iscsi_bus_flash_session *fnode_sess = 913 iscsi_dev_to_flash_session(dev); 914 struct iscsi_transport *t = fnode_sess->transport; 915 int param; 916 917 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { 918 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; 919 } else if (attr == &dev_attr_fnode_discovery_session.attr) { 920 param = ISCSI_FLASHNODE_DISCOVERY_SESS; 921 } else if (attr == &dev_attr_fnode_portal_type.attr) { 922 param = ISCSI_FLASHNODE_PORTAL_TYPE; 923 } else if (attr == &dev_attr_fnode_entry_enable.attr) { 924 param = ISCSI_FLASHNODE_ENTRY_EN; 925 } else if (attr == &dev_attr_fnode_immediate_data.attr) { 926 param = ISCSI_FLASHNODE_IMM_DATA_EN; 927 } else if (attr == &dev_attr_fnode_initial_r2t.attr) { 928 param = ISCSI_FLASHNODE_INITIAL_R2T_EN; 929 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { 930 param = ISCSI_FLASHNODE_DATASEQ_INORDER; 931 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { 932 param = ISCSI_FLASHNODE_PDU_INORDER; 933 } else if (attr == &dev_attr_fnode_chap_auth.attr) { 934 param = ISCSI_FLASHNODE_CHAP_AUTH_EN; 935 } else if (attr == &dev_attr_fnode_discovery_logout.attr) { 936 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; 937 } else if (attr == &dev_attr_fnode_bidi_chap.attr) { 938 param = ISCSI_FLASHNODE_BIDI_CHAP_EN; 939 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { 940 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; 941 } else if (attr == &dev_attr_fnode_erl.attr) { 942 param = ISCSI_FLASHNODE_ERL; 943 } else if (attr == &dev_attr_fnode_first_burst_len.attr) { 944 param = ISCSI_FLASHNODE_FIRST_BURST; 945 } else if (attr == &dev_attr_fnode_def_time2wait.attr) { 946 param = ISCSI_FLASHNODE_DEF_TIME2WAIT; 947 } else if (attr == &dev_attr_fnode_def_time2retain.attr) { 948 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; 949 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { 950 param = ISCSI_FLASHNODE_MAX_R2T; 951 } else if (attr == &dev_attr_fnode_isid.attr) { 952 param = ISCSI_FLASHNODE_ISID; 953 } else if (attr == &dev_attr_fnode_tsid.attr) { 954 param = ISCSI_FLASHNODE_TSID; 955 } else if (attr == &dev_attr_fnode_max_burst_len.attr) { 956 param = ISCSI_FLASHNODE_MAX_BURST; 957 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { 958 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; 959 } else if (attr == &dev_attr_fnode_targetalias.attr) { 960 param = ISCSI_FLASHNODE_ALIAS; 961 } else if (attr == &dev_attr_fnode_targetname.attr) { 962 param = ISCSI_FLASHNODE_NAME; 963 } else if (attr == &dev_attr_fnode_tpgt.attr) { 964 param = ISCSI_FLASHNODE_TPGT; 965 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { 966 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; 967 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { 968 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; 969 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { 970 param = ISCSI_FLASHNODE_CHAP_IN_IDX; 971 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { 972 param = ISCSI_FLASHNODE_CHAP_OUT_IDX; 973 } else if (attr == &dev_attr_fnode_username.attr) { 974 param = ISCSI_FLASHNODE_USERNAME; 975 } else if (attr == &dev_attr_fnode_username_in.attr) { 976 param = ISCSI_FLASHNODE_USERNAME_IN; 977 } else if (attr == &dev_attr_fnode_password.attr) { 978 param = ISCSI_FLASHNODE_PASSWORD; 979 } else if (attr == &dev_attr_fnode_password_in.attr) { 980 param = ISCSI_FLASHNODE_PASSWORD_IN; 981 } else if (attr == &dev_attr_fnode_is_boot_target.attr) { 982 param = ISCSI_FLASHNODE_IS_BOOT_TGT; 983 } else { 984 WARN_ONCE(1, "Invalid flashnode session attr"); 985 return 0; 986 } 987 988 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 989 } 990 991 static struct attribute_group iscsi_flashnode_sess_attr_group = { 992 .attrs = iscsi_flashnode_sess_attrs, 993 .is_visible = iscsi_flashnode_sess_attr_is_visible, 994 }; 995 996 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 997 &iscsi_flashnode_sess_attr_group, 998 NULL, 999 }; 1000 1001 static void iscsi_flashnode_sess_release(struct device *dev) 1002 { 1003 struct iscsi_bus_flash_session *fnode_sess = 1004 iscsi_dev_to_flash_session(dev); 1005 1006 kfree(fnode_sess->targetname); 1007 kfree(fnode_sess->targetalias); 1008 kfree(fnode_sess->portal_type); 1009 kfree(fnode_sess); 1010 } 1011 1012 static const struct device_type iscsi_flashnode_sess_dev_type = { 1013 .name = "iscsi_flashnode_sess_dev_type", 1014 .groups = iscsi_flashnode_sess_attr_groups, 1015 .release = iscsi_flashnode_sess_release, 1016 }; 1017 1018 /* flash node connection attrs show */ 1019 #define iscsi_flashnode_conn_attr_show(type, name, param) \ 1020 static ssize_t \ 1021 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 1022 char *buf) \ 1023 { \ 1024 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ 1025 struct iscsi_bus_flash_session *fnode_sess = \ 1026 iscsi_flash_conn_to_flash_session(fnode_conn);\ 1027 struct iscsi_transport *t = fnode_conn->transport; \ 1028 return t->get_flashnode_param(fnode_sess, param, buf); \ 1029 } \ 1030 1031 1032 #define iscsi_flashnode_conn_attr(type, name, param) \ 1033 iscsi_flashnode_conn_attr_show(type, name, param) \ 1034 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1035 show_##type##_##name, NULL); 1036 1037 /* Flash node connection attributes */ 1038 1039 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1040 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1041 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1042 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1043 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1044 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1045 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1046 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1047 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1048 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1049 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1050 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1051 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1052 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1053 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1054 iscsi_flashnode_conn_attr(fnode, fragment_disable, 1055 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1056 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1057 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1058 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1059 iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1060 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1061 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1062 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1063 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1064 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1065 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1066 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1067 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1068 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1069 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1070 iscsi_flashnode_conn_attr(fnode, max_segment_size, 1071 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1072 iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1073 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1074 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1075 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1076 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1077 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1078 1079 static struct attribute *iscsi_flashnode_conn_attrs[] = { 1080 &dev_attr_fnode_is_fw_assigned_ipv6.attr, 1081 &dev_attr_fnode_header_digest.attr, 1082 &dev_attr_fnode_data_digest.attr, 1083 &dev_attr_fnode_snack_req.attr, 1084 &dev_attr_fnode_tcp_timestamp_stat.attr, 1085 &dev_attr_fnode_tcp_nagle_disable.attr, 1086 &dev_attr_fnode_tcp_wsf_disable.attr, 1087 &dev_attr_fnode_tcp_timer_scale.attr, 1088 &dev_attr_fnode_tcp_timestamp_enable.attr, 1089 &dev_attr_fnode_fragment_disable.attr, 1090 &dev_attr_fnode_max_recv_dlength.attr, 1091 &dev_attr_fnode_max_xmit_dlength.attr, 1092 &dev_attr_fnode_keepalive_tmo.attr, 1093 &dev_attr_fnode_port.attr, 1094 &dev_attr_fnode_ipaddress.attr, 1095 &dev_attr_fnode_redirect_ipaddr.attr, 1096 &dev_attr_fnode_max_segment_size.attr, 1097 &dev_attr_fnode_local_port.attr, 1098 &dev_attr_fnode_ipv4_tos.attr, 1099 &dev_attr_fnode_ipv6_traffic_class.attr, 1100 &dev_attr_fnode_ipv6_flow_label.attr, 1101 &dev_attr_fnode_link_local_ipv6.attr, 1102 &dev_attr_fnode_tcp_xmit_wsf.attr, 1103 &dev_attr_fnode_tcp_recv_wsf.attr, 1104 &dev_attr_fnode_statsn.attr, 1105 &dev_attr_fnode_exp_statsn.attr, 1106 NULL, 1107 }; 1108 1109 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, 1110 struct attribute *attr, 1111 int i) 1112 { 1113 struct device *dev = container_of(kobj, struct device, kobj); 1114 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1115 struct iscsi_transport *t = fnode_conn->transport; 1116 int param; 1117 1118 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { 1119 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; 1120 } else if (attr == &dev_attr_fnode_header_digest.attr) { 1121 param = ISCSI_FLASHNODE_HDR_DGST_EN; 1122 } else if (attr == &dev_attr_fnode_data_digest.attr) { 1123 param = ISCSI_FLASHNODE_DATA_DGST_EN; 1124 } else if (attr == &dev_attr_fnode_snack_req.attr) { 1125 param = ISCSI_FLASHNODE_SNACK_REQ_EN; 1126 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { 1127 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; 1128 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { 1129 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; 1130 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { 1131 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; 1132 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { 1133 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; 1134 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { 1135 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; 1136 } else if (attr == &dev_attr_fnode_fragment_disable.attr) { 1137 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; 1138 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { 1139 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; 1140 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { 1141 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; 1142 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { 1143 param = ISCSI_FLASHNODE_KEEPALIVE_TMO; 1144 } else if (attr == &dev_attr_fnode_port.attr) { 1145 param = ISCSI_FLASHNODE_PORT; 1146 } else if (attr == &dev_attr_fnode_ipaddress.attr) { 1147 param = ISCSI_FLASHNODE_IPADDR; 1148 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { 1149 param = ISCSI_FLASHNODE_REDIRECT_IPADDR; 1150 } else if (attr == &dev_attr_fnode_max_segment_size.attr) { 1151 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; 1152 } else if (attr == &dev_attr_fnode_local_port.attr) { 1153 param = ISCSI_FLASHNODE_LOCAL_PORT; 1154 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { 1155 param = ISCSI_FLASHNODE_IPV4_TOS; 1156 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { 1157 param = ISCSI_FLASHNODE_IPV6_TC; 1158 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { 1159 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; 1160 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { 1161 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; 1162 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { 1163 param = ISCSI_FLASHNODE_TCP_XMIT_WSF; 1164 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { 1165 param = ISCSI_FLASHNODE_TCP_RECV_WSF; 1166 } else if (attr == &dev_attr_fnode_statsn.attr) { 1167 param = ISCSI_FLASHNODE_STATSN; 1168 } else if (attr == &dev_attr_fnode_exp_statsn.attr) { 1169 param = ISCSI_FLASHNODE_EXP_STATSN; 1170 } else { 1171 WARN_ONCE(1, "Invalid flashnode connection attr"); 1172 return 0; 1173 } 1174 1175 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1176 } 1177 1178 static struct attribute_group iscsi_flashnode_conn_attr_group = { 1179 .attrs = iscsi_flashnode_conn_attrs, 1180 .is_visible = iscsi_flashnode_conn_attr_is_visible, 1181 }; 1182 1183 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1184 &iscsi_flashnode_conn_attr_group, 1185 NULL, 1186 }; 1187 1188 static void iscsi_flashnode_conn_release(struct device *dev) 1189 { 1190 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1191 1192 kfree(fnode_conn->ipaddress); 1193 kfree(fnode_conn->redirect_ipaddr); 1194 kfree(fnode_conn->link_local_ipv6_addr); 1195 kfree(fnode_conn); 1196 } 1197 1198 static const struct device_type iscsi_flashnode_conn_dev_type = { 1199 .name = "iscsi_flashnode_conn_dev_type", 1200 .groups = iscsi_flashnode_conn_attr_groups, 1201 .release = iscsi_flashnode_conn_release, 1202 }; 1203 1204 static const struct bus_type iscsi_flashnode_bus; 1205 1206 int iscsi_flashnode_bus_match(struct device *dev, 1207 struct device_driver *drv) 1208 { 1209 if (dev->bus == &iscsi_flashnode_bus) 1210 return 1; 1211 return 0; 1212 } 1213 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1214 1215 static const struct bus_type iscsi_flashnode_bus = { 1216 .name = "iscsi_flashnode", 1217 .match = &iscsi_flashnode_bus_match, 1218 }; 1219 1220 /** 1221 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs 1222 * @shost: pointer to host data 1223 * @index: index of flashnode to add in sysfs 1224 * @transport: pointer to transport data 1225 * @dd_size: total size to allocate 1226 * 1227 * Adds a sysfs entry for the flashnode session attributes 1228 * 1229 * Returns: 1230 * pointer to allocated flashnode sess on success 1231 * %NULL on failure 1232 */ 1233 struct iscsi_bus_flash_session * 1234 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, 1235 struct iscsi_transport *transport, 1236 int dd_size) 1237 { 1238 struct iscsi_bus_flash_session *fnode_sess; 1239 int err; 1240 1241 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); 1242 if (!fnode_sess) 1243 return NULL; 1244 1245 fnode_sess->transport = transport; 1246 fnode_sess->target_id = index; 1247 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; 1248 fnode_sess->dev.bus = &iscsi_flashnode_bus; 1249 fnode_sess->dev.parent = &shost->shost_gendev; 1250 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", 1251 shost->host_no, index); 1252 1253 err = device_register(&fnode_sess->dev); 1254 if (err) 1255 goto put_dev; 1256 1257 if (dd_size) 1258 fnode_sess->dd_data = &fnode_sess[1]; 1259 1260 return fnode_sess; 1261 1262 put_dev: 1263 put_device(&fnode_sess->dev); 1264 return NULL; 1265 } 1266 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); 1267 1268 /** 1269 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs 1270 * @shost: pointer to host data 1271 * @fnode_sess: pointer to the parent flashnode session entry 1272 * @transport: pointer to transport data 1273 * @dd_size: total size to allocate 1274 * 1275 * Adds a sysfs entry for the flashnode connection attributes 1276 * 1277 * Returns: 1278 * pointer to allocated flashnode conn on success 1279 * %NULL on failure 1280 */ 1281 struct iscsi_bus_flash_conn * 1282 iscsi_create_flashnode_conn(struct Scsi_Host *shost, 1283 struct iscsi_bus_flash_session *fnode_sess, 1284 struct iscsi_transport *transport, 1285 int dd_size) 1286 { 1287 struct iscsi_bus_flash_conn *fnode_conn; 1288 int err; 1289 1290 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); 1291 if (!fnode_conn) 1292 return NULL; 1293 1294 fnode_conn->transport = transport; 1295 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; 1296 fnode_conn->dev.bus = &iscsi_flashnode_bus; 1297 fnode_conn->dev.parent = &fnode_sess->dev; 1298 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", 1299 shost->host_no, fnode_sess->target_id); 1300 1301 err = device_register(&fnode_conn->dev); 1302 if (err) 1303 goto put_dev; 1304 1305 if (dd_size) 1306 fnode_conn->dd_data = &fnode_conn[1]; 1307 1308 return fnode_conn; 1309 1310 put_dev: 1311 put_device(&fnode_conn->dev); 1312 return NULL; 1313 } 1314 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); 1315 1316 /** 1317 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn 1318 * @dev: device to verify 1319 * @data: pointer to data containing value to use for verification 1320 * 1321 * Verifies if the passed device is flashnode conn device 1322 * 1323 * Returns: 1324 * 1 on success 1325 * 0 on failure 1326 */ 1327 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1328 { 1329 return dev->bus == &iscsi_flashnode_bus; 1330 } 1331 1332 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1333 { 1334 device_unregister(&fnode_conn->dev); 1335 return 0; 1336 } 1337 1338 static int flashnode_match_index(struct device *dev, void *data) 1339 { 1340 struct iscsi_bus_flash_session *fnode_sess = NULL; 1341 int ret = 0; 1342 1343 if (!iscsi_flashnode_bus_match(dev, NULL)) 1344 goto exit_match_index; 1345 1346 fnode_sess = iscsi_dev_to_flash_session(dev); 1347 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1348 1349 exit_match_index: 1350 return ret; 1351 } 1352 1353 /** 1354 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1355 * @shost: pointer to host data 1356 * @idx: index to match 1357 * 1358 * Finds the flashnode session object for the passed index 1359 * 1360 * Returns: 1361 * pointer to found flashnode session object on success 1362 * %NULL on failure 1363 */ 1364 static struct iscsi_bus_flash_session * 1365 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1366 { 1367 struct iscsi_bus_flash_session *fnode_sess = NULL; 1368 struct device *dev; 1369 1370 dev = device_find_child(&shost->shost_gendev, &idx, 1371 flashnode_match_index); 1372 if (dev) 1373 fnode_sess = iscsi_dev_to_flash_session(dev); 1374 1375 return fnode_sess; 1376 } 1377 1378 /** 1379 * iscsi_find_flashnode_sess - finds flashnode session entry 1380 * @shost: pointer to host data 1381 * @data: pointer to data containing value to use for comparison 1382 * @fn: function pointer that does actual comparison 1383 * 1384 * Finds the flashnode session object comparing the data passed using logic 1385 * defined in passed function pointer 1386 * 1387 * Returns: 1388 * pointer to found flashnode session device object on success 1389 * %NULL on failure 1390 */ 1391 struct device * 1392 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1393 int (*fn)(struct device *dev, void *data)) 1394 { 1395 return device_find_child(&shost->shost_gendev, data, fn); 1396 } 1397 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1398 1399 /** 1400 * iscsi_find_flashnode_conn - finds flashnode connection entry 1401 * @fnode_sess: pointer to parent flashnode session entry 1402 * 1403 * Finds the flashnode connection object comparing the data passed using logic 1404 * defined in passed function pointer 1405 * 1406 * Returns: 1407 * pointer to found flashnode connection device object on success 1408 * %NULL on failure 1409 */ 1410 struct device * 1411 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1412 { 1413 return device_find_child(&fnode_sess->dev, NULL, 1414 iscsi_is_flashnode_conn_dev); 1415 } 1416 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1417 1418 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1419 { 1420 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1421 return 0; 1422 1423 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1424 } 1425 1426 /** 1427 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1428 * @fnode_sess: pointer to flashnode session entry to be destroyed 1429 * 1430 * Deletes the flashnode session entry and all children flashnode connection 1431 * entries from sysfs 1432 */ 1433 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1434 { 1435 int err; 1436 1437 err = device_for_each_child(&fnode_sess->dev, NULL, 1438 iscsi_iter_destroy_flashnode_conn_fn); 1439 if (err) 1440 pr_err("Could not delete all connections for %s. Error %d.\n", 1441 fnode_sess->dev.kobj.name, err); 1442 1443 device_unregister(&fnode_sess->dev); 1444 } 1445 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1446 1447 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1448 { 1449 if (!iscsi_flashnode_bus_match(dev, NULL)) 1450 return 0; 1451 1452 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1453 return 0; 1454 } 1455 1456 /** 1457 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1458 * @shost: pointer to host data 1459 * 1460 * Destroys all the flashnode session entries and all corresponding children 1461 * flashnode connection entries from sysfs 1462 */ 1463 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1464 { 1465 device_for_each_child(&shost->shost_gendev, NULL, 1466 iscsi_iter_destroy_flashnode_fn); 1467 } 1468 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1469 1470 /* 1471 * BSG support 1472 */ 1473 /** 1474 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1475 * @job: bsg job to be processed 1476 */ 1477 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1478 { 1479 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1480 struct iscsi_bsg_request *req = job->request; 1481 struct iscsi_bsg_reply *reply = job->reply; 1482 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1483 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1484 int ret; 1485 1486 /* check if we have the msgcode value at least */ 1487 if (job->request_len < sizeof(uint32_t)) { 1488 ret = -ENOMSG; 1489 goto fail_host_msg; 1490 } 1491 1492 /* Validate the host command */ 1493 switch (req->msgcode) { 1494 case ISCSI_BSG_HST_VENDOR: 1495 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1496 if ((shost->hostt->vendor_id == 0L) || 1497 (req->rqst_data.h_vendor.vendor_id != 1498 shost->hostt->vendor_id)) { 1499 ret = -ESRCH; 1500 goto fail_host_msg; 1501 } 1502 break; 1503 default: 1504 ret = -EBADR; 1505 goto fail_host_msg; 1506 } 1507 1508 /* check if we really have all the request data needed */ 1509 if (job->request_len < cmdlen) { 1510 ret = -ENOMSG; 1511 goto fail_host_msg; 1512 } 1513 1514 ret = i->iscsi_transport->bsg_request(job); 1515 if (!ret) 1516 return 0; 1517 1518 fail_host_msg: 1519 /* return the errno failure code as the only status */ 1520 BUG_ON(job->reply_len < sizeof(uint32_t)); 1521 reply->reply_payload_rcv_len = 0; 1522 reply->result = ret; 1523 job->reply_len = sizeof(uint32_t); 1524 bsg_job_done(job, ret, 0); 1525 return 0; 1526 } 1527 1528 /** 1529 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1530 * @shost: shost for iscsi_host 1531 * @ihost: iscsi_cls_host adding the structures to 1532 */ 1533 static int 1534 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1535 { 1536 struct device *dev = &shost->shost_gendev; 1537 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1538 struct queue_limits lim; 1539 struct request_queue *q; 1540 char bsg_name[20]; 1541 1542 if (!i->iscsi_transport->bsg_request) 1543 return -ENOTSUPP; 1544 1545 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1546 scsi_init_limits(shost, &lim); 1547 q = bsg_setup_queue(dev, bsg_name, &lim, iscsi_bsg_host_dispatch, NULL, 1548 0); 1549 if (IS_ERR(q)) { 1550 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1551 "initialize - no request queue\n"); 1552 return PTR_ERR(q); 1553 } 1554 1555 ihost->bsg_q = q; 1556 return 0; 1557 } 1558 1559 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1560 struct device *cdev) 1561 { 1562 struct Scsi_Host *shost = dev_to_shost(dev); 1563 struct iscsi_cls_host *ihost = shost->shost_data; 1564 1565 memset(ihost, 0, sizeof(*ihost)); 1566 mutex_init(&ihost->mutex); 1567 1568 iscsi_bsg_host_add(shost, ihost); 1569 /* ignore any bsg add error - we just can't do sgio */ 1570 1571 return 0; 1572 } 1573 1574 static int iscsi_remove_host(struct transport_container *tc, 1575 struct device *dev, struct device *cdev) 1576 { 1577 struct Scsi_Host *shost = dev_to_shost(dev); 1578 struct iscsi_cls_host *ihost = shost->shost_data; 1579 1580 bsg_remove_queue(ihost->bsg_q); 1581 return 0; 1582 } 1583 1584 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1585 "iscsi_host", 1586 iscsi_setup_host, 1587 iscsi_remove_host, 1588 NULL); 1589 1590 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1591 "iscsi_session", 1592 NULL, 1593 NULL, 1594 NULL); 1595 1596 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1597 "iscsi_connection", 1598 NULL, 1599 NULL, 1600 NULL); 1601 1602 static struct sock *nls; 1603 static DEFINE_MUTEX(rx_queue_mutex); 1604 1605 static LIST_HEAD(sesslist); 1606 static DEFINE_SPINLOCK(sesslock); 1607 static LIST_HEAD(connlist); 1608 static DEFINE_SPINLOCK(connlock); 1609 1610 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1611 { 1612 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1613 return sess->sid; 1614 } 1615 1616 /* 1617 * Returns the matching session to a given sid 1618 */ 1619 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1620 { 1621 unsigned long flags; 1622 struct iscsi_cls_session *sess; 1623 1624 spin_lock_irqsave(&sesslock, flags); 1625 list_for_each_entry(sess, &sesslist, sess_list) { 1626 if (sess->sid == sid) { 1627 spin_unlock_irqrestore(&sesslock, flags); 1628 return sess; 1629 } 1630 } 1631 spin_unlock_irqrestore(&sesslock, flags); 1632 return NULL; 1633 } 1634 1635 /* 1636 * Returns the matching connection to a given sid / cid tuple 1637 */ 1638 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1639 { 1640 unsigned long flags; 1641 struct iscsi_cls_conn *conn; 1642 1643 spin_lock_irqsave(&connlock, flags); 1644 list_for_each_entry(conn, &connlist, conn_list) { 1645 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1646 spin_unlock_irqrestore(&connlock, flags); 1647 return conn; 1648 } 1649 } 1650 spin_unlock_irqrestore(&connlock, flags); 1651 return NULL; 1652 } 1653 1654 /* 1655 * The following functions can be used by LLDs that allocate 1656 * their own scsi_hosts or by software iscsi LLDs 1657 */ 1658 static struct { 1659 int value; 1660 char *name; 1661 } iscsi_session_state_names[] = { 1662 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1663 { ISCSI_SESSION_FAILED, "FAILED" }, 1664 { ISCSI_SESSION_FREE, "FREE" }, 1665 }; 1666 1667 static const char *iscsi_session_state_name(int state) 1668 { 1669 int i; 1670 char *name = NULL; 1671 1672 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1673 if (iscsi_session_state_names[i].value == state) { 1674 name = iscsi_session_state_names[i].name; 1675 break; 1676 } 1677 } 1678 return name; 1679 } 1680 1681 static char *iscsi_session_target_state_name[] = { 1682 [ISCSI_SESSION_TARGET_UNBOUND] = "UNBOUND", 1683 [ISCSI_SESSION_TARGET_ALLOCATED] = "ALLOCATED", 1684 [ISCSI_SESSION_TARGET_SCANNED] = "SCANNED", 1685 [ISCSI_SESSION_TARGET_UNBINDING] = "UNBINDING", 1686 }; 1687 1688 int iscsi_session_chkready(struct iscsi_cls_session *session) 1689 { 1690 int err; 1691 1692 switch (session->state) { 1693 case ISCSI_SESSION_LOGGED_IN: 1694 err = 0; 1695 break; 1696 case ISCSI_SESSION_FAILED: 1697 err = DID_IMM_RETRY << 16; 1698 break; 1699 case ISCSI_SESSION_FREE: 1700 err = DID_TRANSPORT_FAILFAST << 16; 1701 break; 1702 default: 1703 err = DID_NO_CONNECT << 16; 1704 break; 1705 } 1706 return err; 1707 } 1708 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1709 1710 int iscsi_is_session_online(struct iscsi_cls_session *session) 1711 { 1712 unsigned long flags; 1713 int ret = 0; 1714 1715 spin_lock_irqsave(&session->lock, flags); 1716 if (session->state == ISCSI_SESSION_LOGGED_IN) 1717 ret = 1; 1718 spin_unlock_irqrestore(&session->lock, flags); 1719 return ret; 1720 } 1721 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1722 1723 static void iscsi_session_release(struct device *dev) 1724 { 1725 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1726 struct Scsi_Host *shost; 1727 1728 shost = iscsi_session_to_shost(session); 1729 scsi_host_put(shost); 1730 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1731 kfree(session); 1732 } 1733 1734 int iscsi_is_session_dev(const struct device *dev) 1735 { 1736 return dev->release == iscsi_session_release; 1737 } 1738 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1739 1740 static int iscsi_iter_session_fn(struct device *dev, void *data) 1741 { 1742 void (* fn) (struct iscsi_cls_session *) = data; 1743 1744 if (!iscsi_is_session_dev(dev)) 1745 return 0; 1746 fn(iscsi_dev_to_session(dev)); 1747 return 0; 1748 } 1749 1750 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1751 void (*fn)(struct iscsi_cls_session *)) 1752 { 1753 device_for_each_child(&shost->shost_gendev, fn, 1754 iscsi_iter_session_fn); 1755 } 1756 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1757 1758 struct iscsi_scan_data { 1759 unsigned int channel; 1760 unsigned int id; 1761 u64 lun; 1762 enum scsi_scan_mode rescan; 1763 }; 1764 1765 static int iscsi_user_scan_session(struct device *dev, void *data) 1766 { 1767 struct iscsi_scan_data *scan_data = data; 1768 struct iscsi_cls_session *session; 1769 struct Scsi_Host *shost; 1770 struct iscsi_cls_host *ihost; 1771 unsigned long flags; 1772 unsigned int id; 1773 1774 if (!iscsi_is_session_dev(dev)) 1775 return 0; 1776 1777 session = iscsi_dev_to_session(dev); 1778 1779 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1780 1781 shost = iscsi_session_to_shost(session); 1782 ihost = shost->shost_data; 1783 1784 mutex_lock(&ihost->mutex); 1785 spin_lock_irqsave(&session->lock, flags); 1786 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1787 spin_unlock_irqrestore(&session->lock, flags); 1788 goto user_scan_exit; 1789 } 1790 id = session->target_id; 1791 spin_unlock_irqrestore(&session->lock, flags); 1792 1793 if (id != ISCSI_MAX_TARGET) { 1794 if ((scan_data->channel == SCAN_WILD_CARD || 1795 scan_data->channel == 0) && 1796 (scan_data->id == SCAN_WILD_CARD || 1797 scan_data->id == id)) { 1798 scsi_scan_target(&session->dev, 0, id, 1799 scan_data->lun, scan_data->rescan); 1800 spin_lock_irqsave(&session->lock, flags); 1801 session->target_state = ISCSI_SESSION_TARGET_SCANNED; 1802 spin_unlock_irqrestore(&session->lock, flags); 1803 } 1804 } 1805 1806 user_scan_exit: 1807 mutex_unlock(&ihost->mutex); 1808 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1809 return 0; 1810 } 1811 1812 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1813 uint id, u64 lun) 1814 { 1815 struct iscsi_scan_data scan_data; 1816 1817 scan_data.channel = channel; 1818 scan_data.id = id; 1819 scan_data.lun = lun; 1820 scan_data.rescan = SCSI_SCAN_MANUAL; 1821 1822 return device_for_each_child(&shost->shost_gendev, &scan_data, 1823 iscsi_user_scan_session); 1824 } 1825 1826 static void iscsi_scan_session(struct work_struct *work) 1827 { 1828 struct iscsi_cls_session *session = 1829 container_of(work, struct iscsi_cls_session, scan_work); 1830 struct iscsi_scan_data scan_data; 1831 1832 scan_data.channel = 0; 1833 scan_data.id = SCAN_WILD_CARD; 1834 scan_data.lun = SCAN_WILD_CARD; 1835 scan_data.rescan = SCSI_SCAN_RESCAN; 1836 1837 iscsi_user_scan_session(&session->dev, &scan_data); 1838 } 1839 1840 /** 1841 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1842 * @cmd: scsi cmd passed to scsi eh handler 1843 * 1844 * If the session is down this function will wait for the recovery 1845 * timer to fire or for the session to be logged back in. If the 1846 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1847 * should pass this error value to the scsi eh. 1848 */ 1849 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1850 { 1851 struct iscsi_cls_session *session = 1852 starget_to_session(scsi_target(cmd->device)); 1853 unsigned long flags; 1854 int ret = 0; 1855 1856 spin_lock_irqsave(&session->lock, flags); 1857 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1858 if (session->state == ISCSI_SESSION_FREE) { 1859 ret = FAST_IO_FAIL; 1860 break; 1861 } 1862 spin_unlock_irqrestore(&session->lock, flags); 1863 msleep(1000); 1864 spin_lock_irqsave(&session->lock, flags); 1865 } 1866 spin_unlock_irqrestore(&session->lock, flags); 1867 return ret; 1868 } 1869 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1870 1871 static void session_recovery_timedout(struct work_struct *work) 1872 { 1873 struct iscsi_cls_session *session = 1874 container_of(work, struct iscsi_cls_session, 1875 recovery_work.work); 1876 unsigned long flags; 1877 1878 iscsi_cls_session_printk(KERN_INFO, session, 1879 "session recovery timed out after %d secs\n", 1880 session->recovery_tmo); 1881 1882 spin_lock_irqsave(&session->lock, flags); 1883 switch (session->state) { 1884 case ISCSI_SESSION_FAILED: 1885 session->state = ISCSI_SESSION_FREE; 1886 break; 1887 case ISCSI_SESSION_LOGGED_IN: 1888 case ISCSI_SESSION_FREE: 1889 /* we raced with the unblock's flush */ 1890 spin_unlock_irqrestore(&session->lock, flags); 1891 return; 1892 } 1893 spin_unlock_irqrestore(&session->lock, flags); 1894 1895 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1896 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1897 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1898 1899 if (session->transport->session_recovery_timedout) 1900 session->transport->session_recovery_timedout(session); 1901 } 1902 1903 static void __iscsi_unblock_session(struct work_struct *work) 1904 { 1905 struct iscsi_cls_session *session = 1906 container_of(work, struct iscsi_cls_session, 1907 unblock_work); 1908 unsigned long flags; 1909 1910 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1911 1912 cancel_delayed_work_sync(&session->recovery_work); 1913 spin_lock_irqsave(&session->lock, flags); 1914 session->state = ISCSI_SESSION_LOGGED_IN; 1915 spin_unlock_irqrestore(&session->lock, flags); 1916 /* start IO */ 1917 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1918 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1919 } 1920 1921 /** 1922 * iscsi_unblock_session - set a session as logged in and start IO. 1923 * @session: iscsi session 1924 * 1925 * Mark a session as ready to accept IO. 1926 */ 1927 void iscsi_unblock_session(struct iscsi_cls_session *session) 1928 { 1929 if (!cancel_work_sync(&session->block_work)) 1930 cancel_delayed_work_sync(&session->recovery_work); 1931 1932 queue_work(session->workq, &session->unblock_work); 1933 /* 1934 * Blocking the session can be done from any context so we only 1935 * queue the block work. Make sure the unblock work has completed 1936 * because it flushes/cancels the other works and updates the state. 1937 */ 1938 flush_work(&session->unblock_work); 1939 } 1940 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1941 1942 static void __iscsi_block_session(struct work_struct *work) 1943 { 1944 struct iscsi_cls_session *session = 1945 container_of(work, struct iscsi_cls_session, 1946 block_work); 1947 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1948 unsigned long flags; 1949 1950 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1951 spin_lock_irqsave(&session->lock, flags); 1952 session->state = ISCSI_SESSION_FAILED; 1953 spin_unlock_irqrestore(&session->lock, flags); 1954 scsi_block_targets(shost, &session->dev); 1955 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1956 if (session->recovery_tmo >= 0) 1957 queue_delayed_work(session->workq, 1958 &session->recovery_work, 1959 session->recovery_tmo * HZ); 1960 } 1961 1962 void iscsi_block_session(struct iscsi_cls_session *session) 1963 { 1964 queue_work(session->workq, &session->block_work); 1965 } 1966 EXPORT_SYMBOL_GPL(iscsi_block_session); 1967 1968 static void __iscsi_unbind_session(struct work_struct *work) 1969 { 1970 struct iscsi_cls_session *session = 1971 container_of(work, struct iscsi_cls_session, 1972 unbind_work); 1973 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1974 struct iscsi_cls_host *ihost = shost->shost_data; 1975 unsigned long flags; 1976 unsigned int target_id; 1977 bool remove_target = true; 1978 1979 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 1980 1981 /* Prevent new scans and make sure scanning is not in progress */ 1982 mutex_lock(&ihost->mutex); 1983 spin_lock_irqsave(&session->lock, flags); 1984 if (session->target_state == ISCSI_SESSION_TARGET_ALLOCATED) { 1985 remove_target = false; 1986 } else if (session->target_state != ISCSI_SESSION_TARGET_SCANNED) { 1987 spin_unlock_irqrestore(&session->lock, flags); 1988 mutex_unlock(&ihost->mutex); 1989 ISCSI_DBG_TRANS_SESSION(session, 1990 "Skipping target unbinding: Session is unbound/unbinding.\n"); 1991 return; 1992 } 1993 1994 session->target_state = ISCSI_SESSION_TARGET_UNBINDING; 1995 target_id = session->target_id; 1996 session->target_id = ISCSI_MAX_TARGET; 1997 spin_unlock_irqrestore(&session->lock, flags); 1998 mutex_unlock(&ihost->mutex); 1999 2000 if (remove_target) 2001 scsi_remove_target(&session->dev); 2002 2003 if (session->ida_used) 2004 ida_free(&iscsi_sess_ida, target_id); 2005 2006 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2007 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2008 2009 spin_lock_irqsave(&session->lock, flags); 2010 session->target_state = ISCSI_SESSION_TARGET_UNBOUND; 2011 spin_unlock_irqrestore(&session->lock, flags); 2012 } 2013 2014 static void __iscsi_destroy_session(struct work_struct *work) 2015 { 2016 struct iscsi_cls_session *session = 2017 container_of(work, struct iscsi_cls_session, destroy_work); 2018 2019 session->transport->destroy_session(session); 2020 } 2021 2022 struct iscsi_cls_session * 2023 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2024 int dd_size) 2025 { 2026 struct iscsi_cls_session *session; 2027 2028 session = kzalloc(sizeof(*session) + dd_size, 2029 GFP_KERNEL); 2030 if (!session) 2031 return NULL; 2032 2033 session->transport = transport; 2034 session->creator = -1; 2035 session->recovery_tmo = 120; 2036 session->recovery_tmo_sysfs_override = false; 2037 session->state = ISCSI_SESSION_FREE; 2038 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2039 INIT_LIST_HEAD(&session->sess_list); 2040 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2041 INIT_WORK(&session->block_work, __iscsi_block_session); 2042 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2043 INIT_WORK(&session->scan_work, iscsi_scan_session); 2044 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2045 spin_lock_init(&session->lock); 2046 2047 /* this is released in the dev's release function */ 2048 scsi_host_get(shost); 2049 session->dev.parent = &shost->shost_gendev; 2050 session->dev.release = iscsi_session_release; 2051 device_initialize(&session->dev); 2052 if (dd_size) 2053 session->dd_data = &session[1]; 2054 2055 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2056 return session; 2057 } 2058 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2059 2060 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2061 { 2062 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2063 unsigned long flags; 2064 int id = 0; 2065 int err; 2066 2067 session->sid = atomic_add_return(1, &iscsi_session_nr); 2068 2069 session->workq = alloc_workqueue("iscsi_ctrl_%d:%d", 2070 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 2071 shost->host_no, session->sid); 2072 if (!session->workq) 2073 return -ENOMEM; 2074 2075 if (target_id == ISCSI_MAX_TARGET) { 2076 id = ida_alloc(&iscsi_sess_ida, GFP_KERNEL); 2077 2078 if (id < 0) { 2079 iscsi_cls_session_printk(KERN_ERR, session, 2080 "Failure in Target ID Allocation\n"); 2081 err = id; 2082 goto destroy_wq; 2083 } 2084 session->target_id = (unsigned int)id; 2085 session->ida_used = true; 2086 } else 2087 session->target_id = target_id; 2088 spin_lock_irqsave(&session->lock, flags); 2089 session->target_state = ISCSI_SESSION_TARGET_ALLOCATED; 2090 spin_unlock_irqrestore(&session->lock, flags); 2091 2092 dev_set_name(&session->dev, "session%u", session->sid); 2093 err = device_add(&session->dev); 2094 if (err) { 2095 iscsi_cls_session_printk(KERN_ERR, session, 2096 "could not register session's dev\n"); 2097 goto release_ida; 2098 } 2099 err = transport_register_device(&session->dev); 2100 if (err) { 2101 iscsi_cls_session_printk(KERN_ERR, session, 2102 "could not register transport's dev\n"); 2103 goto release_dev; 2104 } 2105 2106 spin_lock_irqsave(&sesslock, flags); 2107 list_add(&session->sess_list, &sesslist); 2108 spin_unlock_irqrestore(&sesslock, flags); 2109 2110 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2111 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2112 return 0; 2113 2114 release_dev: 2115 device_del(&session->dev); 2116 release_ida: 2117 if (session->ida_used) 2118 ida_free(&iscsi_sess_ida, session->target_id); 2119 destroy_wq: 2120 destroy_workqueue(session->workq); 2121 return err; 2122 } 2123 EXPORT_SYMBOL_GPL(iscsi_add_session); 2124 2125 /** 2126 * iscsi_create_session - create iscsi class session 2127 * @shost: scsi host 2128 * @transport: iscsi transport 2129 * @dd_size: private driver data size 2130 * @target_id: which target 2131 * 2132 * This can be called from a LLD or iscsi_transport. 2133 */ 2134 struct iscsi_cls_session * 2135 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2136 int dd_size, unsigned int target_id) 2137 { 2138 struct iscsi_cls_session *session; 2139 2140 session = iscsi_alloc_session(shost, transport, dd_size); 2141 if (!session) 2142 return NULL; 2143 2144 if (iscsi_add_session(session, target_id)) { 2145 iscsi_free_session(session); 2146 return NULL; 2147 } 2148 return session; 2149 } 2150 EXPORT_SYMBOL_GPL(iscsi_create_session); 2151 2152 static void iscsi_conn_release(struct device *dev) 2153 { 2154 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2155 struct device *parent = conn->dev.parent; 2156 2157 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2158 kfree(conn); 2159 put_device(parent); 2160 } 2161 2162 static int iscsi_is_conn_dev(const struct device *dev) 2163 { 2164 return dev->release == iscsi_conn_release; 2165 } 2166 2167 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2168 { 2169 if (!iscsi_is_conn_dev(dev)) 2170 return 0; 2171 2172 iscsi_remove_conn(iscsi_dev_to_conn(dev)); 2173 return 0; 2174 } 2175 2176 void iscsi_remove_session(struct iscsi_cls_session *session) 2177 { 2178 unsigned long flags; 2179 int err; 2180 2181 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2182 2183 spin_lock_irqsave(&sesslock, flags); 2184 if (!list_empty(&session->sess_list)) 2185 list_del(&session->sess_list); 2186 spin_unlock_irqrestore(&sesslock, flags); 2187 2188 if (!cancel_work_sync(&session->block_work)) 2189 cancel_delayed_work_sync(&session->recovery_work); 2190 cancel_work_sync(&session->unblock_work); 2191 /* 2192 * If we are blocked let commands flow again. The lld or iscsi 2193 * layer should set up the queuecommand to fail commands. 2194 * We assume that LLD will not be calling block/unblock while 2195 * removing the session. 2196 */ 2197 spin_lock_irqsave(&session->lock, flags); 2198 session->state = ISCSI_SESSION_FREE; 2199 spin_unlock_irqrestore(&session->lock, flags); 2200 2201 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2202 /* 2203 * qla4xxx can perform it's own scans when it runs in kernel only 2204 * mode. Make sure to flush those scans. 2205 */ 2206 flush_work(&session->scan_work); 2207 /* flush running unbind operations */ 2208 flush_work(&session->unbind_work); 2209 __iscsi_unbind_session(&session->unbind_work); 2210 2211 /* hw iscsi may not have removed all connections from session */ 2212 err = device_for_each_child(&session->dev, NULL, 2213 iscsi_iter_destroy_conn_fn); 2214 if (err) 2215 iscsi_cls_session_printk(KERN_ERR, session, 2216 "Could not delete all connections " 2217 "for session. Error %d.\n", err); 2218 2219 transport_unregister_device(&session->dev); 2220 2221 destroy_workqueue(session->workq); 2222 2223 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2224 device_del(&session->dev); 2225 } 2226 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2227 2228 static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag) 2229 { 2230 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n"); 2231 2232 switch (flag) { 2233 case STOP_CONN_RECOVER: 2234 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2235 break; 2236 case STOP_CONN_TERM: 2237 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2238 break; 2239 default: 2240 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n", 2241 flag); 2242 return; 2243 } 2244 2245 conn->transport->stop_conn(conn, flag); 2246 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n"); 2247 } 2248 2249 static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active) 2250 { 2251 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2252 struct iscsi_endpoint *ep; 2253 2254 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n"); 2255 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2256 2257 if (!conn->ep || !session->transport->ep_disconnect) 2258 return; 2259 2260 ep = conn->ep; 2261 conn->ep = NULL; 2262 2263 session->transport->unbind_conn(conn, is_active); 2264 session->transport->ep_disconnect(ep); 2265 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n"); 2266 } 2267 2268 static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn, 2269 struct iscsi_endpoint *ep, 2270 bool is_active) 2271 { 2272 /* Check if this was a conn error and the kernel took ownership */ 2273 spin_lock_irq(&conn->lock); 2274 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2275 spin_unlock_irq(&conn->lock); 2276 iscsi_ep_disconnect(conn, is_active); 2277 } else { 2278 spin_unlock_irq(&conn->lock); 2279 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n"); 2280 mutex_unlock(&conn->ep_mutex); 2281 2282 flush_work(&conn->cleanup_work); 2283 /* 2284 * Userspace is now done with the EP so we can release the ref 2285 * iscsi_cleanup_conn_work_fn took. 2286 */ 2287 iscsi_put_endpoint(ep); 2288 mutex_lock(&conn->ep_mutex); 2289 } 2290 } 2291 2292 static int iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2293 { 2294 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n"); 2295 /* 2296 * For offload, iscsid may not know about the ep like when iscsid is 2297 * restarted or for kernel based session shutdown iscsid is not even 2298 * up. For these cases, we do the disconnect now. 2299 */ 2300 mutex_lock(&conn->ep_mutex); 2301 if (conn->ep) 2302 iscsi_if_disconnect_bound_ep(conn, conn->ep, true); 2303 mutex_unlock(&conn->ep_mutex); 2304 2305 /* 2306 * If this is a termination we have to call stop_conn with that flag 2307 * so the correct states get set. If we haven't run the work yet try to 2308 * avoid the extra run. 2309 */ 2310 if (flag == STOP_CONN_TERM) { 2311 cancel_work_sync(&conn->cleanup_work); 2312 iscsi_stop_conn(conn, flag); 2313 } else { 2314 /* 2315 * Figure out if it was the kernel or userspace initiating this. 2316 */ 2317 spin_lock_irq(&conn->lock); 2318 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2319 spin_unlock_irq(&conn->lock); 2320 iscsi_stop_conn(conn, flag); 2321 } else { 2322 spin_unlock_irq(&conn->lock); 2323 ISCSI_DBG_TRANS_CONN(conn, 2324 "flush kernel conn cleanup.\n"); 2325 flush_work(&conn->cleanup_work); 2326 } 2327 /* 2328 * Only clear for recovery to avoid extra cleanup runs during 2329 * termination. 2330 */ 2331 spin_lock_irq(&conn->lock); 2332 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags); 2333 spin_unlock_irq(&conn->lock); 2334 } 2335 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n"); 2336 return 0; 2337 } 2338 2339 static void iscsi_cleanup_conn_work_fn(struct work_struct *work) 2340 { 2341 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn, 2342 cleanup_work); 2343 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2344 2345 mutex_lock(&conn->ep_mutex); 2346 /* 2347 * Get a ref to the ep, so we don't release its ID until after 2348 * userspace is done referencing it in iscsi_if_disconnect_bound_ep. 2349 */ 2350 if (conn->ep) 2351 get_device(&conn->ep->dev); 2352 iscsi_ep_disconnect(conn, false); 2353 2354 if (system_state != SYSTEM_RUNNING) { 2355 /* 2356 * If the user has set up for the session to never timeout 2357 * then hang like they wanted. For all other cases fail right 2358 * away since userspace is not going to relogin. 2359 */ 2360 if (session->recovery_tmo > 0) 2361 session->recovery_tmo = 0; 2362 } 2363 2364 iscsi_stop_conn(conn, STOP_CONN_RECOVER); 2365 mutex_unlock(&conn->ep_mutex); 2366 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n"); 2367 } 2368 2369 static int iscsi_iter_force_destroy_conn_fn(struct device *dev, void *data) 2370 { 2371 struct iscsi_transport *transport; 2372 struct iscsi_cls_conn *conn; 2373 2374 if (!iscsi_is_conn_dev(dev)) 2375 return 0; 2376 2377 conn = iscsi_dev_to_conn(dev); 2378 transport = conn->transport; 2379 2380 if (READ_ONCE(conn->state) != ISCSI_CONN_DOWN) 2381 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2382 2383 transport->destroy_conn(conn); 2384 return 0; 2385 } 2386 2387 /** 2388 * iscsi_force_destroy_session - destroy a session from the kernel 2389 * @session: session to destroy 2390 * 2391 * Force the destruction of a session from the kernel. This should only be 2392 * used when userspace is no longer running during system shutdown. 2393 */ 2394 void iscsi_force_destroy_session(struct iscsi_cls_session *session) 2395 { 2396 struct iscsi_transport *transport = session->transport; 2397 unsigned long flags; 2398 2399 WARN_ON_ONCE(system_state == SYSTEM_RUNNING); 2400 2401 spin_lock_irqsave(&sesslock, flags); 2402 if (list_empty(&session->sess_list)) { 2403 spin_unlock_irqrestore(&sesslock, flags); 2404 /* 2405 * Conn/ep is already freed. Session is being torn down via 2406 * async path. For shutdown we don't care about it so return. 2407 */ 2408 return; 2409 } 2410 spin_unlock_irqrestore(&sesslock, flags); 2411 2412 device_for_each_child(&session->dev, NULL, 2413 iscsi_iter_force_destroy_conn_fn); 2414 transport->destroy_session(session); 2415 } 2416 EXPORT_SYMBOL_GPL(iscsi_force_destroy_session); 2417 2418 void iscsi_free_session(struct iscsi_cls_session *session) 2419 { 2420 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2421 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2422 put_device(&session->dev); 2423 } 2424 EXPORT_SYMBOL_GPL(iscsi_free_session); 2425 2426 /** 2427 * iscsi_alloc_conn - alloc iscsi class connection 2428 * @session: iscsi cls session 2429 * @dd_size: private driver data size 2430 * @cid: connection id 2431 */ 2432 struct iscsi_cls_conn * 2433 iscsi_alloc_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2434 { 2435 struct iscsi_transport *transport = session->transport; 2436 struct iscsi_cls_conn *conn; 2437 2438 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2439 if (!conn) 2440 return NULL; 2441 if (dd_size) 2442 conn->dd_data = &conn[1]; 2443 2444 mutex_init(&conn->ep_mutex); 2445 spin_lock_init(&conn->lock); 2446 INIT_LIST_HEAD(&conn->conn_list); 2447 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn); 2448 conn->transport = transport; 2449 conn->cid = cid; 2450 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2451 2452 /* this is released in the dev's release function */ 2453 if (!get_device(&session->dev)) 2454 goto free_conn; 2455 2456 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2457 device_initialize(&conn->dev); 2458 conn->dev.parent = &session->dev; 2459 conn->dev.release = iscsi_conn_release; 2460 2461 return conn; 2462 2463 free_conn: 2464 kfree(conn); 2465 return NULL; 2466 } 2467 EXPORT_SYMBOL_GPL(iscsi_alloc_conn); 2468 2469 /** 2470 * iscsi_add_conn - add iscsi class connection 2471 * @conn: iscsi cls connection 2472 * 2473 * This will expose iscsi_cls_conn to sysfs so make sure the related 2474 * resources for sysfs attributes are initialized before calling this. 2475 */ 2476 int iscsi_add_conn(struct iscsi_cls_conn *conn) 2477 { 2478 int err; 2479 unsigned long flags; 2480 struct iscsi_cls_session *session = iscsi_dev_to_session(conn->dev.parent); 2481 2482 err = device_add(&conn->dev); 2483 if (err) { 2484 iscsi_cls_session_printk(KERN_ERR, session, 2485 "could not register connection's dev\n"); 2486 return err; 2487 } 2488 err = transport_register_device(&conn->dev); 2489 if (err) { 2490 iscsi_cls_session_printk(KERN_ERR, session, 2491 "could not register transport's dev\n"); 2492 device_del(&conn->dev); 2493 return err; 2494 } 2495 2496 spin_lock_irqsave(&connlock, flags); 2497 list_add(&conn->conn_list, &connlist); 2498 spin_unlock_irqrestore(&connlock, flags); 2499 2500 return 0; 2501 } 2502 EXPORT_SYMBOL_GPL(iscsi_add_conn); 2503 2504 /** 2505 * iscsi_remove_conn - remove iscsi class connection from sysfs 2506 * @conn: iscsi cls connection 2507 * 2508 * Remove iscsi_cls_conn from sysfs, and wait for previous 2509 * read/write of iscsi_cls_conn's attributes in sysfs to finish. 2510 */ 2511 void iscsi_remove_conn(struct iscsi_cls_conn *conn) 2512 { 2513 unsigned long flags; 2514 2515 spin_lock_irqsave(&connlock, flags); 2516 list_del(&conn->conn_list); 2517 spin_unlock_irqrestore(&connlock, flags); 2518 2519 transport_unregister_device(&conn->dev); 2520 device_del(&conn->dev); 2521 } 2522 EXPORT_SYMBOL_GPL(iscsi_remove_conn); 2523 2524 void iscsi_put_conn(struct iscsi_cls_conn *conn) 2525 { 2526 put_device(&conn->dev); 2527 } 2528 EXPORT_SYMBOL_GPL(iscsi_put_conn); 2529 2530 void iscsi_get_conn(struct iscsi_cls_conn *conn) 2531 { 2532 get_device(&conn->dev); 2533 } 2534 EXPORT_SYMBOL_GPL(iscsi_get_conn); 2535 2536 /* 2537 * iscsi interface functions 2538 */ 2539 static struct iscsi_internal * 2540 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2541 { 2542 struct iscsi_internal *priv; 2543 unsigned long flags; 2544 2545 spin_lock_irqsave(&iscsi_transport_lock, flags); 2546 list_for_each_entry(priv, &iscsi_transports, list) { 2547 if (tt == priv->iscsi_transport) { 2548 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2549 return priv; 2550 } 2551 } 2552 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2553 return NULL; 2554 } 2555 2556 static int 2557 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2558 { 2559 return nlmsg_multicast(nls, skb, 0, group, gfp); 2560 } 2561 2562 static int 2563 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2564 { 2565 return nlmsg_unicast(nls, skb, portid); 2566 } 2567 2568 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2569 char *data, uint32_t data_size) 2570 { 2571 struct nlmsghdr *nlh; 2572 struct sk_buff *skb; 2573 struct iscsi_uevent *ev; 2574 char *pdu; 2575 struct iscsi_internal *priv; 2576 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2577 data_size); 2578 2579 priv = iscsi_if_transport_lookup(conn->transport); 2580 if (!priv) 2581 return -EINVAL; 2582 2583 skb = alloc_skb(len, GFP_ATOMIC); 2584 if (!skb) { 2585 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2586 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2587 "control PDU: OOM\n"); 2588 return -ENOMEM; 2589 } 2590 2591 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2592 ev = nlmsg_data(nlh); 2593 memset(ev, 0, sizeof(*ev)); 2594 ev->transport_handle = iscsi_handle(conn->transport); 2595 ev->type = ISCSI_KEVENT_RECV_PDU; 2596 ev->r.recv_req.cid = conn->cid; 2597 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2598 pdu = (char*)ev + sizeof(*ev); 2599 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2600 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2601 2602 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2603 } 2604 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2605 2606 int iscsi_offload_mesg(struct Scsi_Host *shost, 2607 struct iscsi_transport *transport, uint32_t type, 2608 char *data, uint16_t data_size) 2609 { 2610 struct nlmsghdr *nlh; 2611 struct sk_buff *skb; 2612 struct iscsi_uevent *ev; 2613 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2614 2615 skb = alloc_skb(len, GFP_ATOMIC); 2616 if (!skb) { 2617 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2618 return -ENOMEM; 2619 } 2620 2621 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2622 ev = nlmsg_data(nlh); 2623 memset(ev, 0, sizeof(*ev)); 2624 ev->type = type; 2625 ev->transport_handle = iscsi_handle(transport); 2626 switch (type) { 2627 case ISCSI_KEVENT_PATH_REQ: 2628 ev->r.req_path.host_no = shost->host_no; 2629 break; 2630 case ISCSI_KEVENT_IF_DOWN: 2631 ev->r.notify_if_down.host_no = shost->host_no; 2632 break; 2633 } 2634 2635 memcpy((char *)ev + sizeof(*ev), data, data_size); 2636 2637 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2638 } 2639 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2640 2641 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2642 { 2643 struct nlmsghdr *nlh; 2644 struct sk_buff *skb; 2645 struct iscsi_uevent *ev; 2646 struct iscsi_internal *priv; 2647 int len = nlmsg_total_size(sizeof(*ev)); 2648 unsigned long flags; 2649 int state; 2650 2651 spin_lock_irqsave(&conn->lock, flags); 2652 /* 2653 * Userspace will only do a stop call if we are at least bound. And, we 2654 * only need to do the in kernel cleanup if in the UP state so cmds can 2655 * be released to upper layers. If in other states just wait for 2656 * userspace to avoid races that can leave the cleanup_work queued. 2657 */ 2658 state = READ_ONCE(conn->state); 2659 switch (state) { 2660 case ISCSI_CONN_BOUND: 2661 case ISCSI_CONN_UP: 2662 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, 2663 &conn->flags)) { 2664 queue_work(iscsi_conn_cleanup_workq, 2665 &conn->cleanup_work); 2666 } 2667 break; 2668 default: 2669 ISCSI_DBG_TRANS_CONN(conn, "Got conn error in state %d\n", 2670 state); 2671 break; 2672 } 2673 spin_unlock_irqrestore(&conn->lock, flags); 2674 2675 priv = iscsi_if_transport_lookup(conn->transport); 2676 if (!priv) 2677 return; 2678 2679 skb = alloc_skb(len, GFP_ATOMIC); 2680 if (!skb) { 2681 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2682 "conn error (%d)\n", error); 2683 return; 2684 } 2685 2686 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2687 ev = nlmsg_data(nlh); 2688 ev->transport_handle = iscsi_handle(conn->transport); 2689 ev->type = ISCSI_KEVENT_CONN_ERROR; 2690 ev->r.connerror.error = error; 2691 ev->r.connerror.cid = conn->cid; 2692 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2693 2694 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2695 2696 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2697 error); 2698 } 2699 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2700 2701 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2702 enum iscsi_conn_state state) 2703 { 2704 struct nlmsghdr *nlh; 2705 struct sk_buff *skb; 2706 struct iscsi_uevent *ev; 2707 struct iscsi_internal *priv; 2708 int len = nlmsg_total_size(sizeof(*ev)); 2709 2710 priv = iscsi_if_transport_lookup(conn->transport); 2711 if (!priv) 2712 return; 2713 2714 skb = alloc_skb(len, GFP_ATOMIC); 2715 if (!skb) { 2716 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2717 "conn login (%d)\n", state); 2718 return; 2719 } 2720 2721 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2722 ev = nlmsg_data(nlh); 2723 ev->transport_handle = iscsi_handle(conn->transport); 2724 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2725 ev->r.conn_login.state = state; 2726 ev->r.conn_login.cid = conn->cid; 2727 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2728 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2729 2730 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2731 state); 2732 } 2733 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2734 2735 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2736 enum iscsi_host_event_code code, uint32_t data_size, 2737 uint8_t *data) 2738 { 2739 struct nlmsghdr *nlh; 2740 struct sk_buff *skb; 2741 struct iscsi_uevent *ev; 2742 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2743 2744 skb = alloc_skb(len, GFP_NOIO); 2745 if (!skb) { 2746 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2747 host_no, code); 2748 return; 2749 } 2750 2751 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2752 ev = nlmsg_data(nlh); 2753 ev->transport_handle = iscsi_handle(transport); 2754 ev->type = ISCSI_KEVENT_HOST_EVENT; 2755 ev->r.host_event.host_no = host_no; 2756 ev->r.host_event.code = code; 2757 ev->r.host_event.data_size = data_size; 2758 2759 if (data_size) 2760 memcpy((char *)ev + sizeof(*ev), data, data_size); 2761 2762 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2763 } 2764 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2765 2766 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2767 uint32_t status, uint32_t pid, uint32_t data_size, 2768 uint8_t *data) 2769 { 2770 struct nlmsghdr *nlh; 2771 struct sk_buff *skb; 2772 struct iscsi_uevent *ev; 2773 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2774 2775 skb = alloc_skb(len, GFP_NOIO); 2776 if (!skb) { 2777 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2778 return; 2779 } 2780 2781 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2782 ev = nlmsg_data(nlh); 2783 ev->transport_handle = iscsi_handle(transport); 2784 ev->type = ISCSI_KEVENT_PING_COMP; 2785 ev->r.ping_comp.host_no = host_no; 2786 ev->r.ping_comp.status = status; 2787 ev->r.ping_comp.pid = pid; 2788 ev->r.ping_comp.data_size = data_size; 2789 memcpy((char *)ev + sizeof(*ev), data, data_size); 2790 2791 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2792 } 2793 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2794 2795 static int 2796 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2797 { 2798 struct sk_buff *skb; 2799 struct nlmsghdr *nlh; 2800 int len = nlmsg_total_size(size); 2801 2802 skb = alloc_skb(len, GFP_ATOMIC); 2803 if (!skb) { 2804 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2805 return -ENOMEM; 2806 } 2807 2808 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2809 memcpy(nlmsg_data(nlh), payload, size); 2810 return iscsi_unicast_skb(skb, portid); 2811 } 2812 2813 static int 2814 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2815 { 2816 struct iscsi_uevent *ev = nlmsg_data(nlh); 2817 struct iscsi_stats *stats; 2818 struct sk_buff *skbstat; 2819 struct iscsi_cls_conn *conn; 2820 struct nlmsghdr *nlhstat; 2821 struct iscsi_uevent *evstat; 2822 struct iscsi_internal *priv; 2823 int len = nlmsg_total_size(sizeof(*ev) + 2824 sizeof(struct iscsi_stats) + 2825 sizeof(struct iscsi_stats_custom) * 2826 ISCSI_STATS_CUSTOM_MAX); 2827 int err = 0; 2828 2829 priv = iscsi_if_transport_lookup(transport); 2830 if (!priv) 2831 return -EINVAL; 2832 2833 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2834 if (!conn) 2835 return -EEXIST; 2836 2837 do { 2838 int actual_size; 2839 2840 skbstat = alloc_skb(len, GFP_ATOMIC); 2841 if (!skbstat) { 2842 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2843 "deliver stats: OOM\n"); 2844 return -ENOMEM; 2845 } 2846 2847 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2848 (len - sizeof(*nlhstat)), 0); 2849 evstat = nlmsg_data(nlhstat); 2850 memset(evstat, 0, sizeof(*evstat)); 2851 evstat->transport_handle = iscsi_handle(conn->transport); 2852 evstat->type = nlh->nlmsg_type; 2853 evstat->u.get_stats.cid = 2854 ev->u.get_stats.cid; 2855 evstat->u.get_stats.sid = 2856 ev->u.get_stats.sid; 2857 stats = (struct iscsi_stats *) 2858 ((char*)evstat + sizeof(*evstat)); 2859 memset(stats, 0, sizeof(*stats)); 2860 2861 transport->get_stats(conn, stats); 2862 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2863 sizeof(struct iscsi_stats) + 2864 sizeof(struct iscsi_stats_custom) * 2865 stats->custom_length); 2866 actual_size -= sizeof(*nlhstat); 2867 actual_size = nlmsg_msg_size(actual_size); 2868 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2869 nlhstat->nlmsg_len = actual_size; 2870 2871 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2872 GFP_ATOMIC); 2873 } while (err < 0 && err != -ECONNREFUSED); 2874 2875 return err; 2876 } 2877 2878 /** 2879 * iscsi_session_event - send session destr. completion event 2880 * @session: iscsi class session 2881 * @event: type of event 2882 */ 2883 int iscsi_session_event(struct iscsi_cls_session *session, 2884 enum iscsi_uevent_e event) 2885 { 2886 struct iscsi_internal *priv; 2887 struct Scsi_Host *shost; 2888 struct iscsi_uevent *ev; 2889 struct sk_buff *skb; 2890 struct nlmsghdr *nlh; 2891 int rc, len = nlmsg_total_size(sizeof(*ev)); 2892 2893 priv = iscsi_if_transport_lookup(session->transport); 2894 if (!priv) 2895 return -EINVAL; 2896 shost = iscsi_session_to_shost(session); 2897 2898 skb = alloc_skb(len, GFP_KERNEL); 2899 if (!skb) { 2900 iscsi_cls_session_printk(KERN_ERR, session, 2901 "Cannot notify userspace of session " 2902 "event %u\n", event); 2903 return -ENOMEM; 2904 } 2905 2906 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2907 ev = nlmsg_data(nlh); 2908 ev->transport_handle = iscsi_handle(session->transport); 2909 2910 ev->type = event; 2911 switch (event) { 2912 case ISCSI_KEVENT_DESTROY_SESSION: 2913 ev->r.d_session.host_no = shost->host_no; 2914 ev->r.d_session.sid = session->sid; 2915 break; 2916 case ISCSI_KEVENT_CREATE_SESSION: 2917 ev->r.c_session_ret.host_no = shost->host_no; 2918 ev->r.c_session_ret.sid = session->sid; 2919 break; 2920 case ISCSI_KEVENT_UNBIND_SESSION: 2921 ev->r.unbind_session.host_no = shost->host_no; 2922 ev->r.unbind_session.sid = session->sid; 2923 break; 2924 default: 2925 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2926 "%u.\n", event); 2927 kfree_skb(skb); 2928 return -EINVAL; 2929 } 2930 2931 /* 2932 * this will occur if the daemon is not up, so we just warn 2933 * the user and when the daemon is restarted it will handle it 2934 */ 2935 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2936 if (rc == -ESRCH) 2937 iscsi_cls_session_printk(KERN_ERR, session, 2938 "Cannot notify userspace of session " 2939 "event %u. Check iscsi daemon\n", 2940 event); 2941 2942 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2943 event, rc); 2944 return rc; 2945 } 2946 EXPORT_SYMBOL_GPL(iscsi_session_event); 2947 2948 static int 2949 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2950 struct iscsi_uevent *ev, pid_t pid, 2951 uint32_t initial_cmdsn, uint16_t cmds_max, 2952 uint16_t queue_depth) 2953 { 2954 struct iscsi_transport *transport = priv->iscsi_transport; 2955 struct iscsi_cls_session *session; 2956 struct Scsi_Host *shost; 2957 2958 session = transport->create_session(ep, cmds_max, queue_depth, 2959 initial_cmdsn); 2960 if (!session) 2961 return -ENOMEM; 2962 2963 session->creator = pid; 2964 shost = iscsi_session_to_shost(session); 2965 ev->r.c_session_ret.host_no = shost->host_no; 2966 ev->r.c_session_ret.sid = session->sid; 2967 ISCSI_DBG_TRANS_SESSION(session, 2968 "Completed creating transport session\n"); 2969 return 0; 2970 } 2971 2972 static int 2973 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2974 { 2975 struct iscsi_cls_conn *conn; 2976 struct iscsi_cls_session *session; 2977 2978 session = iscsi_session_lookup(ev->u.c_conn.sid); 2979 if (!session) { 2980 printk(KERN_ERR "iscsi: invalid session %d.\n", 2981 ev->u.c_conn.sid); 2982 return -EINVAL; 2983 } 2984 2985 conn = transport->create_conn(session, ev->u.c_conn.cid); 2986 if (!conn) { 2987 iscsi_cls_session_printk(KERN_ERR, session, 2988 "couldn't create a new connection."); 2989 return -ENOMEM; 2990 } 2991 2992 ev->r.c_conn_ret.sid = session->sid; 2993 ev->r.c_conn_ret.cid = conn->cid; 2994 2995 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2996 return 0; 2997 } 2998 2999 static int 3000 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3001 { 3002 struct iscsi_cls_conn *conn; 3003 3004 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 3005 if (!conn) 3006 return -EINVAL; 3007 3008 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n"); 3009 flush_work(&conn->cleanup_work); 3010 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 3011 3012 if (transport->destroy_conn) 3013 transport->destroy_conn(conn); 3014 return 0; 3015 } 3016 3017 static int 3018 iscsi_if_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen) 3019 { 3020 char *data = (char*)ev + sizeof(*ev); 3021 struct iscsi_cls_conn *conn; 3022 struct iscsi_cls_session *session; 3023 int err = 0, value = 0, state; 3024 3025 if (ev->u.set_param.len > rlen || 3026 ev->u.set_param.len > PAGE_SIZE) 3027 return -EINVAL; 3028 3029 session = iscsi_session_lookup(ev->u.set_param.sid); 3030 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 3031 if (!conn || !session) 3032 return -EINVAL; 3033 3034 /* data will be regarded as NULL-ended string, do length check */ 3035 if (strlen(data) > ev->u.set_param.len) 3036 return -EINVAL; 3037 3038 switch (ev->u.set_param.param) { 3039 case ISCSI_PARAM_SESS_RECOVERY_TMO: 3040 sscanf(data, "%d", &value); 3041 if (!session->recovery_tmo_sysfs_override) 3042 session->recovery_tmo = value; 3043 break; 3044 default: 3045 state = READ_ONCE(conn->state); 3046 if (state == ISCSI_CONN_BOUND || state == ISCSI_CONN_UP) { 3047 err = transport->set_param(conn, ev->u.set_param.param, 3048 data, ev->u.set_param.len); 3049 } else { 3050 return -ENOTCONN; 3051 } 3052 } 3053 3054 return err; 3055 } 3056 3057 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 3058 struct iscsi_uevent *ev, int msg_type) 3059 { 3060 struct iscsi_endpoint *ep; 3061 struct sockaddr *dst_addr; 3062 struct Scsi_Host *shost = NULL; 3063 int non_blocking, err = 0; 3064 3065 if (!transport->ep_connect) 3066 return -EINVAL; 3067 3068 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 3069 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 3070 if (!shost) { 3071 printk(KERN_ERR "ep connect failed. Could not find " 3072 "host no %u\n", 3073 ev->u.ep_connect_through_host.host_no); 3074 return -ENODEV; 3075 } 3076 non_blocking = ev->u.ep_connect_through_host.non_blocking; 3077 } else 3078 non_blocking = ev->u.ep_connect.non_blocking; 3079 3080 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3081 ep = transport->ep_connect(shost, dst_addr, non_blocking); 3082 if (IS_ERR(ep)) { 3083 err = PTR_ERR(ep); 3084 goto release_host; 3085 } 3086 3087 ev->r.ep_connect_ret.handle = ep->id; 3088 release_host: 3089 if (shost) 3090 scsi_host_put(shost); 3091 return err; 3092 } 3093 3094 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 3095 u64 ep_handle) 3096 { 3097 struct iscsi_cls_conn *conn; 3098 struct iscsi_endpoint *ep; 3099 3100 if (!transport->ep_disconnect) 3101 return -EINVAL; 3102 3103 ep = iscsi_lookup_endpoint(ep_handle); 3104 if (!ep) 3105 return -EINVAL; 3106 3107 conn = ep->conn; 3108 if (!conn) { 3109 /* 3110 * conn was not even bound yet, so we can't get iscsi conn 3111 * failures yet. 3112 */ 3113 transport->ep_disconnect(ep); 3114 goto put_ep; 3115 } 3116 3117 mutex_lock(&conn->ep_mutex); 3118 iscsi_if_disconnect_bound_ep(conn, ep, false); 3119 mutex_unlock(&conn->ep_mutex); 3120 put_ep: 3121 iscsi_put_endpoint(ep); 3122 return 0; 3123 } 3124 3125 static int 3126 iscsi_if_transport_ep(struct iscsi_transport *transport, 3127 struct iscsi_uevent *ev, int msg_type, u32 rlen) 3128 { 3129 struct iscsi_endpoint *ep; 3130 int rc = 0; 3131 3132 switch (msg_type) { 3133 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3134 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3135 if (rlen < sizeof(struct sockaddr)) 3136 rc = -EINVAL; 3137 else 3138 rc = iscsi_if_ep_connect(transport, ev, msg_type); 3139 break; 3140 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3141 if (!transport->ep_poll) 3142 return -EINVAL; 3143 3144 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 3145 if (!ep) 3146 return -EINVAL; 3147 3148 ev->r.retcode = transport->ep_poll(ep, 3149 ev->u.ep_poll.timeout_ms); 3150 iscsi_put_endpoint(ep); 3151 break; 3152 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3153 rc = iscsi_if_ep_disconnect(transport, 3154 ev->u.ep_disconnect.ep_handle); 3155 break; 3156 } 3157 return rc; 3158 } 3159 3160 static int 3161 iscsi_tgt_dscvr(struct iscsi_transport *transport, 3162 struct iscsi_uevent *ev, u32 rlen) 3163 { 3164 struct Scsi_Host *shost; 3165 struct sockaddr *dst_addr; 3166 int err; 3167 3168 if (rlen < sizeof(*dst_addr)) 3169 return -EINVAL; 3170 3171 if (!transport->tgt_dscvr) 3172 return -EINVAL; 3173 3174 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3175 if (!shost) { 3176 printk(KERN_ERR "target discovery could not find host no %u\n", 3177 ev->u.tgt_dscvr.host_no); 3178 return -ENODEV; 3179 } 3180 3181 3182 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3183 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3184 ev->u.tgt_dscvr.enable, dst_addr); 3185 scsi_host_put(shost); 3186 return err; 3187 } 3188 3189 static int 3190 iscsi_set_host_param(struct iscsi_transport *transport, 3191 struct iscsi_uevent *ev, u32 rlen) 3192 { 3193 char *data = (char*)ev + sizeof(*ev); 3194 struct Scsi_Host *shost; 3195 int err; 3196 3197 if (!transport->set_host_param) 3198 return -ENOSYS; 3199 3200 if (ev->u.set_host_param.len > rlen || 3201 ev->u.set_host_param.len > PAGE_SIZE) 3202 return -EINVAL; 3203 3204 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3205 if (!shost) { 3206 printk(KERN_ERR "set_host_param could not find host no %u\n", 3207 ev->u.set_host_param.host_no); 3208 return -ENODEV; 3209 } 3210 3211 /* see similar check in iscsi_if_set_param() */ 3212 if (strlen(data) > ev->u.set_host_param.len) 3213 return -EINVAL; 3214 3215 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3216 data, ev->u.set_host_param.len); 3217 scsi_host_put(shost); 3218 return err; 3219 } 3220 3221 static int 3222 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen) 3223 { 3224 struct Scsi_Host *shost; 3225 struct iscsi_path *params; 3226 int err; 3227 3228 if (rlen < sizeof(*params)) 3229 return -EINVAL; 3230 3231 if (!transport->set_path) 3232 return -ENOSYS; 3233 3234 shost = scsi_host_lookup(ev->u.set_path.host_no); 3235 if (!shost) { 3236 printk(KERN_ERR "set path could not find host no %u\n", 3237 ev->u.set_path.host_no); 3238 return -ENODEV; 3239 } 3240 3241 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3242 err = transport->set_path(shost, params); 3243 3244 scsi_host_put(shost); 3245 return err; 3246 } 3247 3248 static int iscsi_session_has_conns(int sid) 3249 { 3250 struct iscsi_cls_conn *conn; 3251 unsigned long flags; 3252 int found = 0; 3253 3254 spin_lock_irqsave(&connlock, flags); 3255 list_for_each_entry(conn, &connlist, conn_list) { 3256 if (iscsi_conn_get_sid(conn) == sid) { 3257 found = 1; 3258 break; 3259 } 3260 } 3261 spin_unlock_irqrestore(&connlock, flags); 3262 3263 return found; 3264 } 3265 3266 static int 3267 iscsi_set_iface_params(struct iscsi_transport *transport, 3268 struct iscsi_uevent *ev, uint32_t len) 3269 { 3270 char *data = (char *)ev + sizeof(*ev); 3271 struct Scsi_Host *shost; 3272 int err; 3273 3274 if (!transport->set_iface_param) 3275 return -ENOSYS; 3276 3277 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3278 if (!shost) { 3279 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3280 ev->u.set_iface_params.host_no); 3281 return -ENODEV; 3282 } 3283 3284 err = transport->set_iface_param(shost, data, len); 3285 scsi_host_put(shost); 3286 return err; 3287 } 3288 3289 static int 3290 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen) 3291 { 3292 struct Scsi_Host *shost; 3293 struct sockaddr *dst_addr; 3294 int err; 3295 3296 if (rlen < sizeof(*dst_addr)) 3297 return -EINVAL; 3298 3299 if (!transport->send_ping) 3300 return -ENOSYS; 3301 3302 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3303 if (!shost) { 3304 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3305 ev->u.iscsi_ping.host_no); 3306 return -ENODEV; 3307 } 3308 3309 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3310 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3311 ev->u.iscsi_ping.iface_type, 3312 ev->u.iscsi_ping.payload_size, 3313 ev->u.iscsi_ping.pid, 3314 dst_addr); 3315 scsi_host_put(shost); 3316 return err; 3317 } 3318 3319 static int 3320 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3321 { 3322 struct iscsi_uevent *ev = nlmsg_data(nlh); 3323 struct Scsi_Host *shost = NULL; 3324 struct iscsi_chap_rec *chap_rec; 3325 struct iscsi_internal *priv; 3326 struct sk_buff *skbchap; 3327 struct nlmsghdr *nlhchap; 3328 struct iscsi_uevent *evchap; 3329 uint32_t chap_buf_size; 3330 int len, err = 0; 3331 char *buf; 3332 3333 if (!transport->get_chap) 3334 return -EINVAL; 3335 3336 priv = iscsi_if_transport_lookup(transport); 3337 if (!priv) 3338 return -EINVAL; 3339 3340 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3341 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3342 3343 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3344 if (!shost) { 3345 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3346 __func__, ev->u.get_chap.host_no); 3347 return -ENODEV; 3348 } 3349 3350 do { 3351 int actual_size; 3352 3353 skbchap = alloc_skb(len, GFP_KERNEL); 3354 if (!skbchap) { 3355 printk(KERN_ERR "can not deliver chap: OOM\n"); 3356 err = -ENOMEM; 3357 goto exit_get_chap; 3358 } 3359 3360 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3361 (len - sizeof(*nlhchap)), 0); 3362 evchap = nlmsg_data(nlhchap); 3363 memset(evchap, 0, sizeof(*evchap)); 3364 evchap->transport_handle = iscsi_handle(transport); 3365 evchap->type = nlh->nlmsg_type; 3366 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3367 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3368 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3369 buf = (char *)evchap + sizeof(*evchap); 3370 memset(buf, 0, chap_buf_size); 3371 3372 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3373 &evchap->u.get_chap.num_entries, buf); 3374 3375 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3376 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3377 nlhchap->nlmsg_len = actual_size; 3378 3379 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3380 GFP_KERNEL); 3381 } while (err < 0 && err != -ECONNREFUSED); 3382 3383 exit_get_chap: 3384 scsi_host_put(shost); 3385 return err; 3386 } 3387 3388 static int iscsi_set_chap(struct iscsi_transport *transport, 3389 struct iscsi_uevent *ev, uint32_t len) 3390 { 3391 char *data = (char *)ev + sizeof(*ev); 3392 struct Scsi_Host *shost; 3393 int err = 0; 3394 3395 if (!transport->set_chap) 3396 return -ENOSYS; 3397 3398 shost = scsi_host_lookup(ev->u.set_path.host_no); 3399 if (!shost) { 3400 pr_err("%s could not find host no %u\n", 3401 __func__, ev->u.set_path.host_no); 3402 return -ENODEV; 3403 } 3404 3405 err = transport->set_chap(shost, data, len); 3406 scsi_host_put(shost); 3407 return err; 3408 } 3409 3410 static int iscsi_delete_chap(struct iscsi_transport *transport, 3411 struct iscsi_uevent *ev) 3412 { 3413 struct Scsi_Host *shost; 3414 int err = 0; 3415 3416 if (!transport->delete_chap) 3417 return -ENOSYS; 3418 3419 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3420 if (!shost) { 3421 printk(KERN_ERR "%s could not find host no %u\n", 3422 __func__, ev->u.delete_chap.host_no); 3423 return -ENODEV; 3424 } 3425 3426 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3427 scsi_host_put(shost); 3428 return err; 3429 } 3430 3431 static const struct { 3432 enum iscsi_discovery_parent_type value; 3433 char *name; 3434 } iscsi_discovery_parent_names[] = { 3435 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3436 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3437 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3438 }; 3439 3440 char *iscsi_get_discovery_parent_name(int parent_type) 3441 { 3442 int i; 3443 char *state = "Unknown!"; 3444 3445 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3446 if (iscsi_discovery_parent_names[i].value & parent_type) { 3447 state = iscsi_discovery_parent_names[i].name; 3448 break; 3449 } 3450 } 3451 return state; 3452 } 3453 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3454 3455 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3456 struct iscsi_uevent *ev, uint32_t len) 3457 { 3458 char *data = (char *)ev + sizeof(*ev); 3459 struct Scsi_Host *shost; 3460 struct iscsi_bus_flash_session *fnode_sess; 3461 struct iscsi_bus_flash_conn *fnode_conn; 3462 struct device *dev; 3463 uint32_t idx; 3464 int err = 0; 3465 3466 if (!transport->set_flashnode_param) { 3467 err = -ENOSYS; 3468 goto exit_set_fnode; 3469 } 3470 3471 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3472 if (!shost) { 3473 pr_err("%s could not find host no %u\n", 3474 __func__, ev->u.set_flashnode.host_no); 3475 err = -ENODEV; 3476 goto exit_set_fnode; 3477 } 3478 3479 idx = ev->u.set_flashnode.flashnode_idx; 3480 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3481 if (!fnode_sess) { 3482 pr_err("%s could not find flashnode %u for host no %u\n", 3483 __func__, idx, ev->u.set_flashnode.host_no); 3484 err = -ENODEV; 3485 goto put_host; 3486 } 3487 3488 dev = iscsi_find_flashnode_conn(fnode_sess); 3489 if (!dev) { 3490 err = -ENODEV; 3491 goto put_sess; 3492 } 3493 3494 fnode_conn = iscsi_dev_to_flash_conn(dev); 3495 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3496 put_device(dev); 3497 3498 put_sess: 3499 put_device(&fnode_sess->dev); 3500 3501 put_host: 3502 scsi_host_put(shost); 3503 3504 exit_set_fnode: 3505 return err; 3506 } 3507 3508 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3509 struct iscsi_uevent *ev, uint32_t len) 3510 { 3511 char *data = (char *)ev + sizeof(*ev); 3512 struct Scsi_Host *shost; 3513 int index; 3514 int err = 0; 3515 3516 if (!transport->new_flashnode) { 3517 err = -ENOSYS; 3518 goto exit_new_fnode; 3519 } 3520 3521 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3522 if (!shost) { 3523 pr_err("%s could not find host no %u\n", 3524 __func__, ev->u.new_flashnode.host_no); 3525 err = -ENODEV; 3526 goto put_host; 3527 } 3528 3529 index = transport->new_flashnode(shost, data, len); 3530 3531 if (index >= 0) 3532 ev->r.new_flashnode_ret.flashnode_idx = index; 3533 else 3534 err = -EIO; 3535 3536 put_host: 3537 scsi_host_put(shost); 3538 3539 exit_new_fnode: 3540 return err; 3541 } 3542 3543 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3544 struct iscsi_uevent *ev) 3545 { 3546 struct Scsi_Host *shost; 3547 struct iscsi_bus_flash_session *fnode_sess; 3548 uint32_t idx; 3549 int err = 0; 3550 3551 if (!transport->del_flashnode) { 3552 err = -ENOSYS; 3553 goto exit_del_fnode; 3554 } 3555 3556 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3557 if (!shost) { 3558 pr_err("%s could not find host no %u\n", 3559 __func__, ev->u.del_flashnode.host_no); 3560 err = -ENODEV; 3561 goto put_host; 3562 } 3563 3564 idx = ev->u.del_flashnode.flashnode_idx; 3565 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3566 if (!fnode_sess) { 3567 pr_err("%s could not find flashnode %u for host no %u\n", 3568 __func__, idx, ev->u.del_flashnode.host_no); 3569 err = -ENODEV; 3570 goto put_host; 3571 } 3572 3573 err = transport->del_flashnode(fnode_sess); 3574 put_device(&fnode_sess->dev); 3575 3576 put_host: 3577 scsi_host_put(shost); 3578 3579 exit_del_fnode: 3580 return err; 3581 } 3582 3583 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3584 struct iscsi_uevent *ev) 3585 { 3586 struct Scsi_Host *shost; 3587 struct iscsi_bus_flash_session *fnode_sess; 3588 struct iscsi_bus_flash_conn *fnode_conn; 3589 struct device *dev; 3590 uint32_t idx; 3591 int err = 0; 3592 3593 if (!transport->login_flashnode) { 3594 err = -ENOSYS; 3595 goto exit_login_fnode; 3596 } 3597 3598 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3599 if (!shost) { 3600 pr_err("%s could not find host no %u\n", 3601 __func__, ev->u.login_flashnode.host_no); 3602 err = -ENODEV; 3603 goto put_host; 3604 } 3605 3606 idx = ev->u.login_flashnode.flashnode_idx; 3607 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3608 if (!fnode_sess) { 3609 pr_err("%s could not find flashnode %u for host no %u\n", 3610 __func__, idx, ev->u.login_flashnode.host_no); 3611 err = -ENODEV; 3612 goto put_host; 3613 } 3614 3615 dev = iscsi_find_flashnode_conn(fnode_sess); 3616 if (!dev) { 3617 err = -ENODEV; 3618 goto put_sess; 3619 } 3620 3621 fnode_conn = iscsi_dev_to_flash_conn(dev); 3622 err = transport->login_flashnode(fnode_sess, fnode_conn); 3623 put_device(dev); 3624 3625 put_sess: 3626 put_device(&fnode_sess->dev); 3627 3628 put_host: 3629 scsi_host_put(shost); 3630 3631 exit_login_fnode: 3632 return err; 3633 } 3634 3635 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3636 struct iscsi_uevent *ev) 3637 { 3638 struct Scsi_Host *shost; 3639 struct iscsi_bus_flash_session *fnode_sess; 3640 struct iscsi_bus_flash_conn *fnode_conn; 3641 struct device *dev; 3642 uint32_t idx; 3643 int err = 0; 3644 3645 if (!transport->logout_flashnode) { 3646 err = -ENOSYS; 3647 goto exit_logout_fnode; 3648 } 3649 3650 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3651 if (!shost) { 3652 pr_err("%s could not find host no %u\n", 3653 __func__, ev->u.logout_flashnode.host_no); 3654 err = -ENODEV; 3655 goto put_host; 3656 } 3657 3658 idx = ev->u.logout_flashnode.flashnode_idx; 3659 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3660 if (!fnode_sess) { 3661 pr_err("%s could not find flashnode %u for host no %u\n", 3662 __func__, idx, ev->u.logout_flashnode.host_no); 3663 err = -ENODEV; 3664 goto put_host; 3665 } 3666 3667 dev = iscsi_find_flashnode_conn(fnode_sess); 3668 if (!dev) { 3669 err = -ENODEV; 3670 goto put_sess; 3671 } 3672 3673 fnode_conn = iscsi_dev_to_flash_conn(dev); 3674 3675 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3676 put_device(dev); 3677 3678 put_sess: 3679 put_device(&fnode_sess->dev); 3680 3681 put_host: 3682 scsi_host_put(shost); 3683 3684 exit_logout_fnode: 3685 return err; 3686 } 3687 3688 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3689 struct iscsi_uevent *ev) 3690 { 3691 struct Scsi_Host *shost; 3692 struct iscsi_cls_session *session; 3693 int err = 0; 3694 3695 if (!transport->logout_flashnode_sid) { 3696 err = -ENOSYS; 3697 goto exit_logout_sid; 3698 } 3699 3700 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3701 if (!shost) { 3702 pr_err("%s could not find host no %u\n", 3703 __func__, ev->u.logout_flashnode.host_no); 3704 err = -ENODEV; 3705 goto put_host; 3706 } 3707 3708 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3709 if (!session) { 3710 pr_err("%s could not find session id %u\n", 3711 __func__, ev->u.logout_flashnode_sid.sid); 3712 err = -EINVAL; 3713 goto put_host; 3714 } 3715 3716 err = transport->logout_flashnode_sid(session); 3717 3718 put_host: 3719 scsi_host_put(shost); 3720 3721 exit_logout_sid: 3722 return err; 3723 } 3724 3725 static int 3726 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3727 { 3728 struct iscsi_uevent *ev = nlmsg_data(nlh); 3729 struct Scsi_Host *shost = NULL; 3730 struct iscsi_internal *priv; 3731 struct sk_buff *skbhost_stats; 3732 struct nlmsghdr *nlhhost_stats; 3733 struct iscsi_uevent *evhost_stats; 3734 int host_stats_size = 0; 3735 int len, err = 0; 3736 char *buf; 3737 3738 if (!transport->get_host_stats) 3739 return -ENOSYS; 3740 3741 priv = iscsi_if_transport_lookup(transport); 3742 if (!priv) 3743 return -EINVAL; 3744 3745 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3746 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3747 3748 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3749 if (!shost) { 3750 pr_err("%s: failed. Could not find host no %u\n", 3751 __func__, ev->u.get_host_stats.host_no); 3752 return -ENODEV; 3753 } 3754 3755 do { 3756 int actual_size; 3757 3758 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3759 if (!skbhost_stats) { 3760 pr_err("cannot deliver host stats: OOM\n"); 3761 err = -ENOMEM; 3762 goto exit_host_stats; 3763 } 3764 3765 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3766 (len - sizeof(*nlhhost_stats)), 0); 3767 evhost_stats = nlmsg_data(nlhhost_stats); 3768 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3769 evhost_stats->transport_handle = iscsi_handle(transport); 3770 evhost_stats->type = nlh->nlmsg_type; 3771 evhost_stats->u.get_host_stats.host_no = 3772 ev->u.get_host_stats.host_no; 3773 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3774 memset(buf, 0, host_stats_size); 3775 3776 err = transport->get_host_stats(shost, buf, host_stats_size); 3777 if (err) { 3778 kfree_skb(skbhost_stats); 3779 goto exit_host_stats; 3780 } 3781 3782 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3783 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3784 nlhhost_stats->nlmsg_len = actual_size; 3785 3786 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3787 GFP_KERNEL); 3788 } while (err < 0 && err != -ECONNREFUSED); 3789 3790 exit_host_stats: 3791 scsi_host_put(shost); 3792 return err; 3793 } 3794 3795 static int iscsi_if_transport_conn(struct iscsi_transport *transport, 3796 struct nlmsghdr *nlh, u32 pdu_len) 3797 { 3798 struct iscsi_uevent *ev = nlmsg_data(nlh); 3799 struct iscsi_cls_session *session; 3800 struct iscsi_cls_conn *conn = NULL; 3801 struct iscsi_endpoint *ep; 3802 int err = 0; 3803 3804 switch (nlh->nlmsg_type) { 3805 case ISCSI_UEVENT_CREATE_CONN: 3806 return iscsi_if_create_conn(transport, ev); 3807 case ISCSI_UEVENT_DESTROY_CONN: 3808 return iscsi_if_destroy_conn(transport, ev); 3809 case ISCSI_UEVENT_STOP_CONN: 3810 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, 3811 ev->u.stop_conn.cid); 3812 if (!conn) 3813 return -EINVAL; 3814 3815 return iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3816 } 3817 3818 /* 3819 * The following cmds need to be run under the ep_mutex so in kernel 3820 * conn cleanup (ep_disconnect + unbind and conn) is not done while 3821 * these are running. They also must not run if we have just run a conn 3822 * cleanup because they would set the state in a way that might allow 3823 * IO or send IO themselves. 3824 */ 3825 switch (nlh->nlmsg_type) { 3826 case ISCSI_UEVENT_START_CONN: 3827 conn = iscsi_conn_lookup(ev->u.start_conn.sid, 3828 ev->u.start_conn.cid); 3829 break; 3830 case ISCSI_UEVENT_BIND_CONN: 3831 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3832 break; 3833 case ISCSI_UEVENT_SEND_PDU: 3834 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3835 break; 3836 } 3837 3838 if (!conn) 3839 return -EINVAL; 3840 3841 mutex_lock(&conn->ep_mutex); 3842 spin_lock_irq(&conn->lock); 3843 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 3844 spin_unlock_irq(&conn->lock); 3845 mutex_unlock(&conn->ep_mutex); 3846 ev->r.retcode = -ENOTCONN; 3847 return 0; 3848 } 3849 spin_unlock_irq(&conn->lock); 3850 3851 switch (nlh->nlmsg_type) { 3852 case ISCSI_UEVENT_BIND_CONN: 3853 session = iscsi_session_lookup(ev->u.b_conn.sid); 3854 if (!session) { 3855 err = -EINVAL; 3856 break; 3857 } 3858 3859 ev->r.retcode = transport->bind_conn(session, conn, 3860 ev->u.b_conn.transport_eph, 3861 ev->u.b_conn.is_leading); 3862 if (!ev->r.retcode) 3863 WRITE_ONCE(conn->state, ISCSI_CONN_BOUND); 3864 3865 if (ev->r.retcode || !transport->ep_connect) 3866 break; 3867 3868 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3869 if (ep) { 3870 ep->conn = conn; 3871 conn->ep = ep; 3872 iscsi_put_endpoint(ep); 3873 } else { 3874 err = -ENOTCONN; 3875 iscsi_cls_conn_printk(KERN_ERR, conn, 3876 "Could not set ep conn binding\n"); 3877 } 3878 break; 3879 case ISCSI_UEVENT_START_CONN: 3880 ev->r.retcode = transport->start_conn(conn); 3881 if (!ev->r.retcode) 3882 WRITE_ONCE(conn->state, ISCSI_CONN_UP); 3883 3884 break; 3885 case ISCSI_UEVENT_SEND_PDU: 3886 if ((ev->u.send_pdu.hdr_size > pdu_len) || 3887 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) { 3888 err = -EINVAL; 3889 break; 3890 } 3891 3892 ev->r.retcode = transport->send_pdu(conn, 3893 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)), 3894 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3895 ev->u.send_pdu.data_size); 3896 break; 3897 default: 3898 err = -ENOSYS; 3899 } 3900 3901 mutex_unlock(&conn->ep_mutex); 3902 return err; 3903 } 3904 3905 static int 3906 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3907 { 3908 int err = 0; 3909 u32 portid; 3910 struct iscsi_uevent *ev = nlmsg_data(nlh); 3911 struct iscsi_transport *transport = NULL; 3912 struct iscsi_internal *priv; 3913 struct iscsi_cls_session *session; 3914 struct iscsi_endpoint *ep = NULL; 3915 u32 rlen; 3916 3917 if (!netlink_capable(skb, CAP_SYS_ADMIN)) 3918 return -EPERM; 3919 3920 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3921 *group = ISCSI_NL_GRP_UIP; 3922 else 3923 *group = ISCSI_NL_GRP_ISCSID; 3924 3925 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3926 if (!priv) 3927 return -EINVAL; 3928 transport = priv->iscsi_transport; 3929 3930 if (!try_module_get(transport->owner)) 3931 return -EINVAL; 3932 3933 portid = NETLINK_CB(skb).portid; 3934 3935 /* 3936 * Even though the remaining payload may not be regarded as nlattr, 3937 * (like address or something else), calculate the remaining length 3938 * here to ease following length checks. 3939 */ 3940 rlen = nlmsg_attrlen(nlh, sizeof(*ev)); 3941 3942 switch (nlh->nlmsg_type) { 3943 case ISCSI_UEVENT_CREATE_SESSION: 3944 err = iscsi_if_create_session(priv, ep, ev, 3945 portid, 3946 ev->u.c_session.initial_cmdsn, 3947 ev->u.c_session.cmds_max, 3948 ev->u.c_session.queue_depth); 3949 break; 3950 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3951 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3952 if (!ep) { 3953 err = -EINVAL; 3954 break; 3955 } 3956 3957 err = iscsi_if_create_session(priv, ep, ev, 3958 portid, 3959 ev->u.c_bound_session.initial_cmdsn, 3960 ev->u.c_bound_session.cmds_max, 3961 ev->u.c_bound_session.queue_depth); 3962 iscsi_put_endpoint(ep); 3963 break; 3964 case ISCSI_UEVENT_DESTROY_SESSION: 3965 session = iscsi_session_lookup(ev->u.d_session.sid); 3966 if (!session) 3967 err = -EINVAL; 3968 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3969 err = -EBUSY; 3970 else 3971 transport->destroy_session(session); 3972 break; 3973 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3974 session = iscsi_session_lookup(ev->u.d_session.sid); 3975 if (!session) 3976 err = -EINVAL; 3977 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3978 err = -EBUSY; 3979 else { 3980 unsigned long flags; 3981 3982 /* Prevent this session from being found again */ 3983 spin_lock_irqsave(&sesslock, flags); 3984 list_del_init(&session->sess_list); 3985 spin_unlock_irqrestore(&sesslock, flags); 3986 3987 queue_work(system_unbound_wq, &session->destroy_work); 3988 } 3989 break; 3990 case ISCSI_UEVENT_UNBIND_SESSION: 3991 session = iscsi_session_lookup(ev->u.d_session.sid); 3992 if (session) 3993 queue_work(session->workq, &session->unbind_work); 3994 else 3995 err = -EINVAL; 3996 break; 3997 case ISCSI_UEVENT_SET_PARAM: 3998 err = iscsi_if_set_param(transport, ev, rlen); 3999 break; 4000 case ISCSI_UEVENT_CREATE_CONN: 4001 case ISCSI_UEVENT_DESTROY_CONN: 4002 case ISCSI_UEVENT_STOP_CONN: 4003 case ISCSI_UEVENT_START_CONN: 4004 case ISCSI_UEVENT_BIND_CONN: 4005 case ISCSI_UEVENT_SEND_PDU: 4006 err = iscsi_if_transport_conn(transport, nlh, rlen); 4007 break; 4008 case ISCSI_UEVENT_GET_STATS: 4009 err = iscsi_if_get_stats(transport, nlh); 4010 break; 4011 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 4012 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 4013 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 4014 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 4015 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type, rlen); 4016 break; 4017 case ISCSI_UEVENT_TGT_DSCVR: 4018 err = iscsi_tgt_dscvr(transport, ev, rlen); 4019 break; 4020 case ISCSI_UEVENT_SET_HOST_PARAM: 4021 err = iscsi_set_host_param(transport, ev, rlen); 4022 break; 4023 case ISCSI_UEVENT_PATH_UPDATE: 4024 err = iscsi_set_path(transport, ev, rlen); 4025 break; 4026 case ISCSI_UEVENT_SET_IFACE_PARAMS: 4027 err = iscsi_set_iface_params(transport, ev, rlen); 4028 break; 4029 case ISCSI_UEVENT_PING: 4030 err = iscsi_send_ping(transport, ev, rlen); 4031 break; 4032 case ISCSI_UEVENT_GET_CHAP: 4033 err = iscsi_get_chap(transport, nlh); 4034 break; 4035 case ISCSI_UEVENT_DELETE_CHAP: 4036 err = iscsi_delete_chap(transport, ev); 4037 break; 4038 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 4039 err = iscsi_set_flashnode_param(transport, ev, rlen); 4040 break; 4041 case ISCSI_UEVENT_NEW_FLASHNODE: 4042 err = iscsi_new_flashnode(transport, ev, rlen); 4043 break; 4044 case ISCSI_UEVENT_DEL_FLASHNODE: 4045 err = iscsi_del_flashnode(transport, ev); 4046 break; 4047 case ISCSI_UEVENT_LOGIN_FLASHNODE: 4048 err = iscsi_login_flashnode(transport, ev); 4049 break; 4050 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 4051 err = iscsi_logout_flashnode(transport, ev); 4052 break; 4053 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 4054 err = iscsi_logout_flashnode_sid(transport, ev); 4055 break; 4056 case ISCSI_UEVENT_SET_CHAP: 4057 err = iscsi_set_chap(transport, ev, rlen); 4058 break; 4059 case ISCSI_UEVENT_GET_HOST_STATS: 4060 err = iscsi_get_host_stats(transport, nlh); 4061 break; 4062 default: 4063 err = -ENOSYS; 4064 break; 4065 } 4066 4067 module_put(transport->owner); 4068 return err; 4069 } 4070 4071 /* 4072 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 4073 * Malformed skbs with wrong lengths or invalid creds are not processed. 4074 */ 4075 static void 4076 iscsi_if_rx(struct sk_buff *skb) 4077 { 4078 u32 portid = NETLINK_CB(skb).portid; 4079 4080 mutex_lock(&rx_queue_mutex); 4081 while (skb->len >= NLMSG_HDRLEN) { 4082 int err; 4083 uint32_t rlen; 4084 struct nlmsghdr *nlh; 4085 struct iscsi_uevent *ev; 4086 uint32_t group; 4087 int retries = ISCSI_SEND_MAX_ALLOWED; 4088 4089 nlh = nlmsg_hdr(skb); 4090 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 4091 skb->len < nlh->nlmsg_len) { 4092 break; 4093 } 4094 4095 ev = nlmsg_data(nlh); 4096 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 4097 if (rlen > skb->len) 4098 rlen = skb->len; 4099 4100 err = iscsi_if_recv_msg(skb, nlh, &group); 4101 if (err) { 4102 ev->type = ISCSI_KEVENT_IF_ERROR; 4103 ev->iferror = err; 4104 } 4105 do { 4106 /* 4107 * special case for GET_STATS: 4108 * on success - sending reply and stats from 4109 * inside of if_recv_msg(), 4110 * on error - fall through. 4111 */ 4112 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 4113 break; 4114 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 4115 break; 4116 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 4117 ev, sizeof(*ev)); 4118 if (err == -EAGAIN && --retries < 0) { 4119 printk(KERN_WARNING "Send reply failed, error %d\n", err); 4120 break; 4121 } 4122 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 4123 skb_pull(skb, rlen); 4124 } 4125 mutex_unlock(&rx_queue_mutex); 4126 } 4127 4128 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 4129 struct device_attribute dev_attr_##_prefix##_##_name = \ 4130 __ATTR(_name,_mode,_show,_store) 4131 4132 /* 4133 * iSCSI connection attrs 4134 */ 4135 #define iscsi_conn_attr_show(param) \ 4136 static ssize_t \ 4137 show_conn_param_##param(struct device *dev, \ 4138 struct device_attribute *attr, char *buf) \ 4139 { \ 4140 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4141 struct iscsi_transport *t = conn->transport; \ 4142 return t->get_conn_param(conn, param, buf); \ 4143 } 4144 4145 #define iscsi_conn_attr(field, param) \ 4146 iscsi_conn_attr_show(param) \ 4147 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 4148 NULL); 4149 4150 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 4151 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 4152 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 4153 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 4154 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 4155 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 4156 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 4157 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 4158 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 4159 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 4160 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 4161 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 4162 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 4163 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 4164 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 4165 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 4166 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 4167 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 4168 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 4169 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 4170 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 4171 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 4172 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 4173 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 4174 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 4175 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 4176 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 4177 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 4178 4179 static const char *const connection_state_names[] = { 4180 [ISCSI_CONN_UP] = "up", 4181 [ISCSI_CONN_DOWN] = "down", 4182 [ISCSI_CONN_FAILED] = "failed", 4183 [ISCSI_CONN_BOUND] = "bound" 4184 }; 4185 4186 static ssize_t show_conn_state(struct device *dev, 4187 struct device_attribute *attr, char *buf) 4188 { 4189 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 4190 const char *state = "unknown"; 4191 int conn_state = READ_ONCE(conn->state); 4192 4193 if (conn_state >= 0 && 4194 conn_state < ARRAY_SIZE(connection_state_names)) 4195 state = connection_state_names[conn_state]; 4196 4197 return sysfs_emit(buf, "%s\n", state); 4198 } 4199 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 4200 NULL); 4201 4202 #define iscsi_conn_ep_attr_show(param) \ 4203 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 4204 struct device_attribute *attr,\ 4205 char *buf) \ 4206 { \ 4207 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4208 struct iscsi_transport *t = conn->transport; \ 4209 struct iscsi_endpoint *ep; \ 4210 ssize_t rc; \ 4211 \ 4212 /* \ 4213 * Need to make sure ep_disconnect does not free the LLD's \ 4214 * interconnect resources while we are trying to read them. \ 4215 */ \ 4216 mutex_lock(&conn->ep_mutex); \ 4217 ep = conn->ep; \ 4218 if (!ep && t->ep_connect) { \ 4219 mutex_unlock(&conn->ep_mutex); \ 4220 return -ENOTCONN; \ 4221 } \ 4222 \ 4223 if (ep) \ 4224 rc = t->get_ep_param(ep, param, buf); \ 4225 else \ 4226 rc = t->get_conn_param(conn, param, buf); \ 4227 mutex_unlock(&conn->ep_mutex); \ 4228 return rc; \ 4229 } 4230 4231 #define iscsi_conn_ep_attr(field, param) \ 4232 iscsi_conn_ep_attr_show(param) \ 4233 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4234 show_conn_ep_param_##param, NULL); 4235 4236 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4237 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4238 4239 static struct attribute *iscsi_conn_attrs[] = { 4240 &dev_attr_conn_max_recv_dlength.attr, 4241 &dev_attr_conn_max_xmit_dlength.attr, 4242 &dev_attr_conn_header_digest.attr, 4243 &dev_attr_conn_data_digest.attr, 4244 &dev_attr_conn_ifmarker.attr, 4245 &dev_attr_conn_ofmarker.attr, 4246 &dev_attr_conn_address.attr, 4247 &dev_attr_conn_port.attr, 4248 &dev_attr_conn_exp_statsn.attr, 4249 &dev_attr_conn_persistent_address.attr, 4250 &dev_attr_conn_persistent_port.attr, 4251 &dev_attr_conn_ping_tmo.attr, 4252 &dev_attr_conn_recv_tmo.attr, 4253 &dev_attr_conn_local_port.attr, 4254 &dev_attr_conn_statsn.attr, 4255 &dev_attr_conn_keepalive_tmo.attr, 4256 &dev_attr_conn_max_segment_size.attr, 4257 &dev_attr_conn_tcp_timestamp_stat.attr, 4258 &dev_attr_conn_tcp_wsf_disable.attr, 4259 &dev_attr_conn_tcp_nagle_disable.attr, 4260 &dev_attr_conn_tcp_timer_scale.attr, 4261 &dev_attr_conn_tcp_timestamp_enable.attr, 4262 &dev_attr_conn_fragment_disable.attr, 4263 &dev_attr_conn_ipv4_tos.attr, 4264 &dev_attr_conn_ipv6_traffic_class.attr, 4265 &dev_attr_conn_ipv6_flow_label.attr, 4266 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4267 &dev_attr_conn_tcp_xmit_wsf.attr, 4268 &dev_attr_conn_tcp_recv_wsf.attr, 4269 &dev_attr_conn_local_ipaddr.attr, 4270 &dev_attr_conn_state.attr, 4271 NULL, 4272 }; 4273 4274 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4275 struct attribute *attr, int i) 4276 { 4277 struct device *cdev = container_of(kobj, struct device, kobj); 4278 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4279 struct iscsi_transport *t = conn->transport; 4280 int param; 4281 4282 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4283 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4284 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4285 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4286 else if (attr == &dev_attr_conn_header_digest.attr) 4287 param = ISCSI_PARAM_HDRDGST_EN; 4288 else if (attr == &dev_attr_conn_data_digest.attr) 4289 param = ISCSI_PARAM_DATADGST_EN; 4290 else if (attr == &dev_attr_conn_ifmarker.attr) 4291 param = ISCSI_PARAM_IFMARKER_EN; 4292 else if (attr == &dev_attr_conn_ofmarker.attr) 4293 param = ISCSI_PARAM_OFMARKER_EN; 4294 else if (attr == &dev_attr_conn_address.attr) 4295 param = ISCSI_PARAM_CONN_ADDRESS; 4296 else if (attr == &dev_attr_conn_port.attr) 4297 param = ISCSI_PARAM_CONN_PORT; 4298 else if (attr == &dev_attr_conn_exp_statsn.attr) 4299 param = ISCSI_PARAM_EXP_STATSN; 4300 else if (attr == &dev_attr_conn_persistent_address.attr) 4301 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4302 else if (attr == &dev_attr_conn_persistent_port.attr) 4303 param = ISCSI_PARAM_PERSISTENT_PORT; 4304 else if (attr == &dev_attr_conn_ping_tmo.attr) 4305 param = ISCSI_PARAM_PING_TMO; 4306 else if (attr == &dev_attr_conn_recv_tmo.attr) 4307 param = ISCSI_PARAM_RECV_TMO; 4308 else if (attr == &dev_attr_conn_local_port.attr) 4309 param = ISCSI_PARAM_LOCAL_PORT; 4310 else if (attr == &dev_attr_conn_statsn.attr) 4311 param = ISCSI_PARAM_STATSN; 4312 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4313 param = ISCSI_PARAM_KEEPALIVE_TMO; 4314 else if (attr == &dev_attr_conn_max_segment_size.attr) 4315 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4316 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4317 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4318 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4319 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4320 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4321 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4322 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4323 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4324 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4325 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4326 else if (attr == &dev_attr_conn_fragment_disable.attr) 4327 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4328 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4329 param = ISCSI_PARAM_IPV4_TOS; 4330 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4331 param = ISCSI_PARAM_IPV6_TC; 4332 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4333 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4334 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4335 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4336 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4337 param = ISCSI_PARAM_TCP_XMIT_WSF; 4338 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4339 param = ISCSI_PARAM_TCP_RECV_WSF; 4340 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4341 param = ISCSI_PARAM_LOCAL_IPADDR; 4342 else if (attr == &dev_attr_conn_state.attr) 4343 return S_IRUGO; 4344 else { 4345 WARN_ONCE(1, "Invalid conn attr"); 4346 return 0; 4347 } 4348 4349 return t->attr_is_visible(ISCSI_PARAM, param); 4350 } 4351 4352 static struct attribute_group iscsi_conn_group = { 4353 .attrs = iscsi_conn_attrs, 4354 .is_visible = iscsi_conn_attr_is_visible, 4355 }; 4356 4357 /* 4358 * iSCSI session attrs 4359 */ 4360 #define iscsi_session_attr_show(param, perm) \ 4361 static ssize_t \ 4362 show_session_param_##param(struct device *dev, \ 4363 struct device_attribute *attr, char *buf) \ 4364 { \ 4365 struct iscsi_cls_session *session = \ 4366 iscsi_dev_to_session(dev->parent); \ 4367 struct iscsi_transport *t = session->transport; \ 4368 \ 4369 if (perm && !capable(CAP_SYS_ADMIN)) \ 4370 return -EACCES; \ 4371 return t->get_session_param(session, param, buf); \ 4372 } 4373 4374 #define iscsi_session_attr(field, param, perm) \ 4375 iscsi_session_attr_show(param, perm) \ 4376 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4377 NULL); 4378 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4379 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4380 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4381 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4382 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4383 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4384 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4385 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4386 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4387 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4388 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4389 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4390 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4391 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4392 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4393 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4394 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4395 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4396 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4397 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4398 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4399 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4400 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4401 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4402 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4403 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4404 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4405 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4406 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4407 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4408 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4409 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4410 iscsi_session_attr(discovery_auth_optional, 4411 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4412 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4413 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4414 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4415 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4416 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4417 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4418 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4419 4420 static ssize_t 4421 show_priv_session_target_state(struct device *dev, struct device_attribute *attr, 4422 char *buf) 4423 { 4424 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4425 4426 return sysfs_emit(buf, "%s\n", 4427 iscsi_session_target_state_name[session->target_state]); 4428 } 4429 4430 static ISCSI_CLASS_ATTR(priv_sess, target_state, S_IRUGO, 4431 show_priv_session_target_state, NULL); 4432 4433 static ssize_t 4434 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4435 char *buf) 4436 { 4437 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4438 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state)); 4439 } 4440 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4441 NULL); 4442 static ssize_t 4443 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4444 char *buf) 4445 { 4446 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4447 return sysfs_emit(buf, "%d\n", session->creator); 4448 } 4449 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4450 NULL); 4451 static ssize_t 4452 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4453 char *buf) 4454 { 4455 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4456 return sysfs_emit(buf, "%d\n", session->target_id); 4457 } 4458 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4459 show_priv_session_target_id, NULL); 4460 4461 #define iscsi_priv_session_attr_show(field, format) \ 4462 static ssize_t \ 4463 show_priv_session_##field(struct device *dev, \ 4464 struct device_attribute *attr, char *buf) \ 4465 { \ 4466 struct iscsi_cls_session *session = \ 4467 iscsi_dev_to_session(dev->parent); \ 4468 if (session->field == -1) \ 4469 return sysfs_emit(buf, "off\n"); \ 4470 return sysfs_emit(buf, format"\n", session->field); \ 4471 } 4472 4473 #define iscsi_priv_session_attr_store(field) \ 4474 static ssize_t \ 4475 store_priv_session_##field(struct device *dev, \ 4476 struct device_attribute *attr, \ 4477 const char *buf, size_t count) \ 4478 { \ 4479 int val; \ 4480 char *cp; \ 4481 struct iscsi_cls_session *session = \ 4482 iscsi_dev_to_session(dev->parent); \ 4483 if ((session->state == ISCSI_SESSION_FREE) || \ 4484 (session->state == ISCSI_SESSION_FAILED)) \ 4485 return -EBUSY; \ 4486 if (strncmp(buf, "off", 3) == 0) { \ 4487 session->field = -1; \ 4488 session->field##_sysfs_override = true; \ 4489 } else { \ 4490 val = simple_strtoul(buf, &cp, 0); \ 4491 if (*cp != '\0' && *cp != '\n') \ 4492 return -EINVAL; \ 4493 session->field = val; \ 4494 session->field##_sysfs_override = true; \ 4495 } \ 4496 return count; \ 4497 } 4498 4499 #define iscsi_priv_session_rw_attr(field, format) \ 4500 iscsi_priv_session_attr_show(field, format) \ 4501 iscsi_priv_session_attr_store(field) \ 4502 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4503 show_priv_session_##field, \ 4504 store_priv_session_##field) 4505 4506 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4507 4508 static struct attribute *iscsi_session_attrs[] = { 4509 &dev_attr_sess_initial_r2t.attr, 4510 &dev_attr_sess_max_outstanding_r2t.attr, 4511 &dev_attr_sess_immediate_data.attr, 4512 &dev_attr_sess_first_burst_len.attr, 4513 &dev_attr_sess_max_burst_len.attr, 4514 &dev_attr_sess_data_pdu_in_order.attr, 4515 &dev_attr_sess_data_seq_in_order.attr, 4516 &dev_attr_sess_erl.attr, 4517 &dev_attr_sess_targetname.attr, 4518 &dev_attr_sess_tpgt.attr, 4519 &dev_attr_sess_password.attr, 4520 &dev_attr_sess_password_in.attr, 4521 &dev_attr_sess_username.attr, 4522 &dev_attr_sess_username_in.attr, 4523 &dev_attr_sess_fast_abort.attr, 4524 &dev_attr_sess_abort_tmo.attr, 4525 &dev_attr_sess_lu_reset_tmo.attr, 4526 &dev_attr_sess_tgt_reset_tmo.attr, 4527 &dev_attr_sess_ifacename.attr, 4528 &dev_attr_sess_initiatorname.attr, 4529 &dev_attr_sess_targetalias.attr, 4530 &dev_attr_sess_boot_root.attr, 4531 &dev_attr_sess_boot_nic.attr, 4532 &dev_attr_sess_boot_target.attr, 4533 &dev_attr_priv_sess_recovery_tmo.attr, 4534 &dev_attr_priv_sess_state.attr, 4535 &dev_attr_priv_sess_target_state.attr, 4536 &dev_attr_priv_sess_creator.attr, 4537 &dev_attr_sess_chap_out_idx.attr, 4538 &dev_attr_sess_chap_in_idx.attr, 4539 &dev_attr_priv_sess_target_id.attr, 4540 &dev_attr_sess_auto_snd_tgt_disable.attr, 4541 &dev_attr_sess_discovery_session.attr, 4542 &dev_attr_sess_portal_type.attr, 4543 &dev_attr_sess_chap_auth.attr, 4544 &dev_attr_sess_discovery_logout.attr, 4545 &dev_attr_sess_bidi_chap.attr, 4546 &dev_attr_sess_discovery_auth_optional.attr, 4547 &dev_attr_sess_def_time2wait.attr, 4548 &dev_attr_sess_def_time2retain.attr, 4549 &dev_attr_sess_isid.attr, 4550 &dev_attr_sess_tsid.attr, 4551 &dev_attr_sess_def_taskmgmt_tmo.attr, 4552 &dev_attr_sess_discovery_parent_idx.attr, 4553 &dev_attr_sess_discovery_parent_type.attr, 4554 NULL, 4555 }; 4556 4557 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4558 struct attribute *attr, int i) 4559 { 4560 struct device *cdev = container_of(kobj, struct device, kobj); 4561 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4562 struct iscsi_transport *t = session->transport; 4563 int param; 4564 4565 if (attr == &dev_attr_sess_initial_r2t.attr) 4566 param = ISCSI_PARAM_INITIAL_R2T_EN; 4567 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4568 param = ISCSI_PARAM_MAX_R2T; 4569 else if (attr == &dev_attr_sess_immediate_data.attr) 4570 param = ISCSI_PARAM_IMM_DATA_EN; 4571 else if (attr == &dev_attr_sess_first_burst_len.attr) 4572 param = ISCSI_PARAM_FIRST_BURST; 4573 else if (attr == &dev_attr_sess_max_burst_len.attr) 4574 param = ISCSI_PARAM_MAX_BURST; 4575 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4576 param = ISCSI_PARAM_PDU_INORDER_EN; 4577 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4578 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4579 else if (attr == &dev_attr_sess_erl.attr) 4580 param = ISCSI_PARAM_ERL; 4581 else if (attr == &dev_attr_sess_targetname.attr) 4582 param = ISCSI_PARAM_TARGET_NAME; 4583 else if (attr == &dev_attr_sess_tpgt.attr) 4584 param = ISCSI_PARAM_TPGT; 4585 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4586 param = ISCSI_PARAM_CHAP_IN_IDX; 4587 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4588 param = ISCSI_PARAM_CHAP_OUT_IDX; 4589 else if (attr == &dev_attr_sess_password.attr) 4590 param = ISCSI_PARAM_USERNAME; 4591 else if (attr == &dev_attr_sess_password_in.attr) 4592 param = ISCSI_PARAM_USERNAME_IN; 4593 else if (attr == &dev_attr_sess_username.attr) 4594 param = ISCSI_PARAM_PASSWORD; 4595 else if (attr == &dev_attr_sess_username_in.attr) 4596 param = ISCSI_PARAM_PASSWORD_IN; 4597 else if (attr == &dev_attr_sess_fast_abort.attr) 4598 param = ISCSI_PARAM_FAST_ABORT; 4599 else if (attr == &dev_attr_sess_abort_tmo.attr) 4600 param = ISCSI_PARAM_ABORT_TMO; 4601 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4602 param = ISCSI_PARAM_LU_RESET_TMO; 4603 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4604 param = ISCSI_PARAM_TGT_RESET_TMO; 4605 else if (attr == &dev_attr_sess_ifacename.attr) 4606 param = ISCSI_PARAM_IFACE_NAME; 4607 else if (attr == &dev_attr_sess_initiatorname.attr) 4608 param = ISCSI_PARAM_INITIATOR_NAME; 4609 else if (attr == &dev_attr_sess_targetalias.attr) 4610 param = ISCSI_PARAM_TARGET_ALIAS; 4611 else if (attr == &dev_attr_sess_boot_root.attr) 4612 param = ISCSI_PARAM_BOOT_ROOT; 4613 else if (attr == &dev_attr_sess_boot_nic.attr) 4614 param = ISCSI_PARAM_BOOT_NIC; 4615 else if (attr == &dev_attr_sess_boot_target.attr) 4616 param = ISCSI_PARAM_BOOT_TARGET; 4617 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4618 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4619 else if (attr == &dev_attr_sess_discovery_session.attr) 4620 param = ISCSI_PARAM_DISCOVERY_SESS; 4621 else if (attr == &dev_attr_sess_portal_type.attr) 4622 param = ISCSI_PARAM_PORTAL_TYPE; 4623 else if (attr == &dev_attr_sess_chap_auth.attr) 4624 param = ISCSI_PARAM_CHAP_AUTH_EN; 4625 else if (attr == &dev_attr_sess_discovery_logout.attr) 4626 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4627 else if (attr == &dev_attr_sess_bidi_chap.attr) 4628 param = ISCSI_PARAM_BIDI_CHAP_EN; 4629 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4630 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4631 else if (attr == &dev_attr_sess_def_time2wait.attr) 4632 param = ISCSI_PARAM_DEF_TIME2WAIT; 4633 else if (attr == &dev_attr_sess_def_time2retain.attr) 4634 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4635 else if (attr == &dev_attr_sess_isid.attr) 4636 param = ISCSI_PARAM_ISID; 4637 else if (attr == &dev_attr_sess_tsid.attr) 4638 param = ISCSI_PARAM_TSID; 4639 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4640 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4641 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4642 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4643 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4644 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4645 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4646 return S_IRUGO | S_IWUSR; 4647 else if (attr == &dev_attr_priv_sess_state.attr) 4648 return S_IRUGO; 4649 else if (attr == &dev_attr_priv_sess_target_state.attr) 4650 return S_IRUGO; 4651 else if (attr == &dev_attr_priv_sess_creator.attr) 4652 return S_IRUGO; 4653 else if (attr == &dev_attr_priv_sess_target_id.attr) 4654 return S_IRUGO; 4655 else { 4656 WARN_ONCE(1, "Invalid session attr"); 4657 return 0; 4658 } 4659 4660 return t->attr_is_visible(ISCSI_PARAM, param); 4661 } 4662 4663 static struct attribute_group iscsi_session_group = { 4664 .attrs = iscsi_session_attrs, 4665 .is_visible = iscsi_session_attr_is_visible, 4666 }; 4667 4668 /* 4669 * iSCSI host attrs 4670 */ 4671 #define iscsi_host_attr_show(param) \ 4672 static ssize_t \ 4673 show_host_param_##param(struct device *dev, \ 4674 struct device_attribute *attr, char *buf) \ 4675 { \ 4676 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4677 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4678 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4679 } 4680 4681 #define iscsi_host_attr(field, param) \ 4682 iscsi_host_attr_show(param) \ 4683 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4684 NULL); 4685 4686 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4687 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4688 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4689 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4690 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4691 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4692 4693 static struct attribute *iscsi_host_attrs[] = { 4694 &dev_attr_host_netdev.attr, 4695 &dev_attr_host_hwaddress.attr, 4696 &dev_attr_host_ipaddress.attr, 4697 &dev_attr_host_initiatorname.attr, 4698 &dev_attr_host_port_state.attr, 4699 &dev_attr_host_port_speed.attr, 4700 NULL, 4701 }; 4702 4703 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4704 struct attribute *attr, int i) 4705 { 4706 struct device *cdev = container_of(kobj, struct device, kobj); 4707 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4708 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4709 int param; 4710 4711 if (attr == &dev_attr_host_netdev.attr) 4712 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4713 else if (attr == &dev_attr_host_hwaddress.attr) 4714 param = ISCSI_HOST_PARAM_HWADDRESS; 4715 else if (attr == &dev_attr_host_ipaddress.attr) 4716 param = ISCSI_HOST_PARAM_IPADDRESS; 4717 else if (attr == &dev_attr_host_initiatorname.attr) 4718 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4719 else if (attr == &dev_attr_host_port_state.attr) 4720 param = ISCSI_HOST_PARAM_PORT_STATE; 4721 else if (attr == &dev_attr_host_port_speed.attr) 4722 param = ISCSI_HOST_PARAM_PORT_SPEED; 4723 else { 4724 WARN_ONCE(1, "Invalid host attr"); 4725 return 0; 4726 } 4727 4728 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4729 } 4730 4731 static struct attribute_group iscsi_host_group = { 4732 .attrs = iscsi_host_attrs, 4733 .is_visible = iscsi_host_attr_is_visible, 4734 }; 4735 4736 /* convert iscsi_port_speed values to ascii string name */ 4737 static const struct { 4738 enum iscsi_port_speed value; 4739 char *name; 4740 } iscsi_port_speed_names[] = { 4741 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4742 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4743 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4744 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4745 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4746 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4747 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4748 }; 4749 4750 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4751 { 4752 int i; 4753 char *speed = "Unknown!"; 4754 struct iscsi_cls_host *ihost = shost->shost_data; 4755 uint32_t port_speed = ihost->port_speed; 4756 4757 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4758 if (iscsi_port_speed_names[i].value & port_speed) { 4759 speed = iscsi_port_speed_names[i].name; 4760 break; 4761 } 4762 } 4763 return speed; 4764 } 4765 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4766 4767 /* convert iscsi_port_state values to ascii string name */ 4768 static const struct { 4769 enum iscsi_port_state value; 4770 char *name; 4771 } iscsi_port_state_names[] = { 4772 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4773 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4774 }; 4775 4776 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4777 { 4778 int i; 4779 char *state = "Unknown!"; 4780 struct iscsi_cls_host *ihost = shost->shost_data; 4781 uint32_t port_state = ihost->port_state; 4782 4783 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4784 if (iscsi_port_state_names[i].value & port_state) { 4785 state = iscsi_port_state_names[i].name; 4786 break; 4787 } 4788 } 4789 return state; 4790 } 4791 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4792 4793 static int iscsi_session_match(struct attribute_container *cont, 4794 struct device *dev) 4795 { 4796 struct iscsi_cls_session *session; 4797 struct Scsi_Host *shost; 4798 struct iscsi_internal *priv; 4799 4800 if (!iscsi_is_session_dev(dev)) 4801 return 0; 4802 4803 session = iscsi_dev_to_session(dev); 4804 shost = iscsi_session_to_shost(session); 4805 if (!shost->transportt) 4806 return 0; 4807 4808 priv = to_iscsi_internal(shost->transportt); 4809 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4810 return 0; 4811 4812 return &priv->session_cont.ac == cont; 4813 } 4814 4815 static int iscsi_conn_match(struct attribute_container *cont, 4816 struct device *dev) 4817 { 4818 struct iscsi_cls_session *session; 4819 struct iscsi_cls_conn *conn; 4820 struct Scsi_Host *shost; 4821 struct iscsi_internal *priv; 4822 4823 if (!iscsi_is_conn_dev(dev)) 4824 return 0; 4825 4826 conn = iscsi_dev_to_conn(dev); 4827 session = iscsi_dev_to_session(conn->dev.parent); 4828 shost = iscsi_session_to_shost(session); 4829 4830 if (!shost->transportt) 4831 return 0; 4832 4833 priv = to_iscsi_internal(shost->transportt); 4834 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4835 return 0; 4836 4837 return &priv->conn_cont.ac == cont; 4838 } 4839 4840 static int iscsi_host_match(struct attribute_container *cont, 4841 struct device *dev) 4842 { 4843 struct Scsi_Host *shost; 4844 struct iscsi_internal *priv; 4845 4846 if (!scsi_is_host_device(dev)) 4847 return 0; 4848 4849 shost = dev_to_shost(dev); 4850 if (!shost->transportt || 4851 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4852 return 0; 4853 4854 priv = to_iscsi_internal(shost->transportt); 4855 return &priv->t.host_attrs.ac == cont; 4856 } 4857 4858 struct scsi_transport_template * 4859 iscsi_register_transport(struct iscsi_transport *tt) 4860 { 4861 struct iscsi_internal *priv; 4862 unsigned long flags; 4863 int err; 4864 4865 BUG_ON(!tt); 4866 WARN_ON(tt->ep_disconnect && !tt->unbind_conn); 4867 4868 priv = iscsi_if_transport_lookup(tt); 4869 if (priv) 4870 return NULL; 4871 4872 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4873 if (!priv) 4874 return NULL; 4875 INIT_LIST_HEAD(&priv->list); 4876 priv->iscsi_transport = tt; 4877 priv->t.user_scan = iscsi_user_scan; 4878 4879 priv->dev.class = &iscsi_transport_class; 4880 dev_set_name(&priv->dev, "%s", tt->name); 4881 err = device_register(&priv->dev); 4882 if (err) 4883 goto put_dev; 4884 4885 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4886 if (err) 4887 goto unregister_dev; 4888 4889 /* host parameters */ 4890 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4891 priv->t.host_attrs.ac.match = iscsi_host_match; 4892 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4893 priv->t.host_size = sizeof(struct iscsi_cls_host); 4894 transport_container_register(&priv->t.host_attrs); 4895 4896 /* connection parameters */ 4897 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4898 priv->conn_cont.ac.match = iscsi_conn_match; 4899 priv->conn_cont.ac.grp = &iscsi_conn_group; 4900 transport_container_register(&priv->conn_cont); 4901 4902 /* session parameters */ 4903 priv->session_cont.ac.class = &iscsi_session_class.class; 4904 priv->session_cont.ac.match = iscsi_session_match; 4905 priv->session_cont.ac.grp = &iscsi_session_group; 4906 transport_container_register(&priv->session_cont); 4907 4908 spin_lock_irqsave(&iscsi_transport_lock, flags); 4909 list_add(&priv->list, &iscsi_transports); 4910 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4911 4912 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4913 return &priv->t; 4914 4915 unregister_dev: 4916 device_unregister(&priv->dev); 4917 return NULL; 4918 put_dev: 4919 put_device(&priv->dev); 4920 return NULL; 4921 } 4922 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4923 4924 void iscsi_unregister_transport(struct iscsi_transport *tt) 4925 { 4926 struct iscsi_internal *priv; 4927 unsigned long flags; 4928 4929 BUG_ON(!tt); 4930 4931 mutex_lock(&rx_queue_mutex); 4932 4933 priv = iscsi_if_transport_lookup(tt); 4934 BUG_ON (!priv); 4935 4936 spin_lock_irqsave(&iscsi_transport_lock, flags); 4937 list_del(&priv->list); 4938 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4939 4940 transport_container_unregister(&priv->conn_cont); 4941 transport_container_unregister(&priv->session_cont); 4942 transport_container_unregister(&priv->t.host_attrs); 4943 4944 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4945 device_unregister(&priv->dev); 4946 mutex_unlock(&rx_queue_mutex); 4947 } 4948 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4949 4950 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4951 struct device *dev, const char *fmt, ...) 4952 { 4953 struct va_format vaf; 4954 va_list args; 4955 4956 va_start(args, fmt); 4957 vaf.fmt = fmt; 4958 vaf.va = &args; 4959 trace(dev, &vaf); 4960 va_end(args); 4961 } 4962 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4963 4964 static __init int iscsi_transport_init(void) 4965 { 4966 int err; 4967 struct netlink_kernel_cfg cfg = { 4968 .groups = 1, 4969 .input = iscsi_if_rx, 4970 }; 4971 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4972 ISCSI_TRANSPORT_VERSION); 4973 4974 atomic_set(&iscsi_session_nr, 0); 4975 4976 err = class_register(&iscsi_transport_class); 4977 if (err) 4978 return err; 4979 4980 err = class_register(&iscsi_endpoint_class); 4981 if (err) 4982 goto unregister_transport_class; 4983 4984 err = class_register(&iscsi_iface_class); 4985 if (err) 4986 goto unregister_endpoint_class; 4987 4988 err = transport_class_register(&iscsi_host_class); 4989 if (err) 4990 goto unregister_iface_class; 4991 4992 err = transport_class_register(&iscsi_connection_class); 4993 if (err) 4994 goto unregister_host_class; 4995 4996 err = transport_class_register(&iscsi_session_class); 4997 if (err) 4998 goto unregister_conn_class; 4999 5000 err = bus_register(&iscsi_flashnode_bus); 5001 if (err) 5002 goto unregister_session_class; 5003 5004 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 5005 if (!nls) { 5006 err = -ENOBUFS; 5007 goto unregister_flashnode_bus; 5008 } 5009 5010 iscsi_conn_cleanup_workq = alloc_workqueue("%s", 5011 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 5012 "iscsi_conn_cleanup"); 5013 if (!iscsi_conn_cleanup_workq) { 5014 err = -ENOMEM; 5015 goto release_nls; 5016 } 5017 5018 return 0; 5019 5020 release_nls: 5021 netlink_kernel_release(nls); 5022 unregister_flashnode_bus: 5023 bus_unregister(&iscsi_flashnode_bus); 5024 unregister_session_class: 5025 transport_class_unregister(&iscsi_session_class); 5026 unregister_conn_class: 5027 transport_class_unregister(&iscsi_connection_class); 5028 unregister_host_class: 5029 transport_class_unregister(&iscsi_host_class); 5030 unregister_iface_class: 5031 class_unregister(&iscsi_iface_class); 5032 unregister_endpoint_class: 5033 class_unregister(&iscsi_endpoint_class); 5034 unregister_transport_class: 5035 class_unregister(&iscsi_transport_class); 5036 return err; 5037 } 5038 5039 static void __exit iscsi_transport_exit(void) 5040 { 5041 destroy_workqueue(iscsi_conn_cleanup_workq); 5042 netlink_kernel_release(nls); 5043 bus_unregister(&iscsi_flashnode_bus); 5044 transport_class_unregister(&iscsi_connection_class); 5045 transport_class_unregister(&iscsi_session_class); 5046 transport_class_unregister(&iscsi_host_class); 5047 class_unregister(&iscsi_endpoint_class); 5048 class_unregister(&iscsi_iface_class); 5049 class_unregister(&iscsi_transport_class); 5050 } 5051 5052 module_init(iscsi_transport_init); 5053 module_exit(iscsi_transport_exit); 5054 5055 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 5056 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 5057 "Alex Aizman <itn780@yahoo.com>"); 5058 MODULE_DESCRIPTION("iSCSI Transport Interface"); 5059 MODULE_LICENSE("GPL"); 5060 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 5061 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 5062