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 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 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 request_queue *q; 1539 char bsg_name[20]; 1540 1541 if (!i->iscsi_transport->bsg_request) 1542 return -ENOTSUPP; 1543 1544 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1545 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1546 if (IS_ERR(q)) { 1547 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1548 "initialize - no request queue\n"); 1549 return PTR_ERR(q); 1550 } 1551 __scsi_init_queue(shost, q); 1552 1553 ihost->bsg_q = q; 1554 return 0; 1555 } 1556 1557 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1558 struct device *cdev) 1559 { 1560 struct Scsi_Host *shost = dev_to_shost(dev); 1561 struct iscsi_cls_host *ihost = shost->shost_data; 1562 1563 memset(ihost, 0, sizeof(*ihost)); 1564 mutex_init(&ihost->mutex); 1565 1566 iscsi_bsg_host_add(shost, ihost); 1567 /* ignore any bsg add error - we just can't do sgio */ 1568 1569 return 0; 1570 } 1571 1572 static int iscsi_remove_host(struct transport_container *tc, 1573 struct device *dev, struct device *cdev) 1574 { 1575 struct Scsi_Host *shost = dev_to_shost(dev); 1576 struct iscsi_cls_host *ihost = shost->shost_data; 1577 1578 bsg_remove_queue(ihost->bsg_q); 1579 return 0; 1580 } 1581 1582 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1583 "iscsi_host", 1584 iscsi_setup_host, 1585 iscsi_remove_host, 1586 NULL); 1587 1588 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1589 "iscsi_session", 1590 NULL, 1591 NULL, 1592 NULL); 1593 1594 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1595 "iscsi_connection", 1596 NULL, 1597 NULL, 1598 NULL); 1599 1600 static struct sock *nls; 1601 static DEFINE_MUTEX(rx_queue_mutex); 1602 1603 static LIST_HEAD(sesslist); 1604 static DEFINE_SPINLOCK(sesslock); 1605 static LIST_HEAD(connlist); 1606 static LIST_HEAD(connlist_err); 1607 static DEFINE_SPINLOCK(connlock); 1608 1609 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1610 { 1611 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1612 return sess->sid; 1613 } 1614 1615 /* 1616 * Returns the matching session to a given sid 1617 */ 1618 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1619 { 1620 unsigned long flags; 1621 struct iscsi_cls_session *sess; 1622 1623 spin_lock_irqsave(&sesslock, flags); 1624 list_for_each_entry(sess, &sesslist, sess_list) { 1625 if (sess->sid == sid) { 1626 spin_unlock_irqrestore(&sesslock, flags); 1627 return sess; 1628 } 1629 } 1630 spin_unlock_irqrestore(&sesslock, flags); 1631 return NULL; 1632 } 1633 1634 /* 1635 * Returns the matching connection to a given sid / cid tuple 1636 */ 1637 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1638 { 1639 unsigned long flags; 1640 struct iscsi_cls_conn *conn; 1641 1642 spin_lock_irqsave(&connlock, flags); 1643 list_for_each_entry(conn, &connlist, conn_list) { 1644 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1645 spin_unlock_irqrestore(&connlock, flags); 1646 return conn; 1647 } 1648 } 1649 spin_unlock_irqrestore(&connlock, flags); 1650 return NULL; 1651 } 1652 1653 /* 1654 * The following functions can be used by LLDs that allocate 1655 * their own scsi_hosts or by software iscsi LLDs 1656 */ 1657 static struct { 1658 int value; 1659 char *name; 1660 } iscsi_session_state_names[] = { 1661 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1662 { ISCSI_SESSION_FAILED, "FAILED" }, 1663 { ISCSI_SESSION_FREE, "FREE" }, 1664 }; 1665 1666 static const char *iscsi_session_state_name(int state) 1667 { 1668 int i; 1669 char *name = NULL; 1670 1671 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1672 if (iscsi_session_state_names[i].value == state) { 1673 name = iscsi_session_state_names[i].name; 1674 break; 1675 } 1676 } 1677 return name; 1678 } 1679 1680 static char *iscsi_session_target_state_name[] = { 1681 [ISCSI_SESSION_TARGET_UNBOUND] = "UNBOUND", 1682 [ISCSI_SESSION_TARGET_ALLOCATED] = "ALLOCATED", 1683 [ISCSI_SESSION_TARGET_SCANNED] = "SCANNED", 1684 [ISCSI_SESSION_TARGET_UNBINDING] = "UNBINDING", 1685 }; 1686 1687 int iscsi_session_chkready(struct iscsi_cls_session *session) 1688 { 1689 int err; 1690 1691 switch (session->state) { 1692 case ISCSI_SESSION_LOGGED_IN: 1693 err = 0; 1694 break; 1695 case ISCSI_SESSION_FAILED: 1696 err = DID_IMM_RETRY << 16; 1697 break; 1698 case ISCSI_SESSION_FREE: 1699 err = DID_TRANSPORT_FAILFAST << 16; 1700 break; 1701 default: 1702 err = DID_NO_CONNECT << 16; 1703 break; 1704 } 1705 return err; 1706 } 1707 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1708 1709 int iscsi_is_session_online(struct iscsi_cls_session *session) 1710 { 1711 unsigned long flags; 1712 int ret = 0; 1713 1714 spin_lock_irqsave(&session->lock, flags); 1715 if (session->state == ISCSI_SESSION_LOGGED_IN) 1716 ret = 1; 1717 spin_unlock_irqrestore(&session->lock, flags); 1718 return ret; 1719 } 1720 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1721 1722 static void iscsi_session_release(struct device *dev) 1723 { 1724 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1725 struct Scsi_Host *shost; 1726 1727 shost = iscsi_session_to_shost(session); 1728 scsi_host_put(shost); 1729 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1730 kfree(session); 1731 } 1732 1733 int iscsi_is_session_dev(const struct device *dev) 1734 { 1735 return dev->release == iscsi_session_release; 1736 } 1737 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1738 1739 static int iscsi_iter_session_fn(struct device *dev, void *data) 1740 { 1741 void (* fn) (struct iscsi_cls_session *) = data; 1742 1743 if (!iscsi_is_session_dev(dev)) 1744 return 0; 1745 fn(iscsi_dev_to_session(dev)); 1746 return 0; 1747 } 1748 1749 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1750 void (*fn)(struct iscsi_cls_session *)) 1751 { 1752 device_for_each_child(&shost->shost_gendev, fn, 1753 iscsi_iter_session_fn); 1754 } 1755 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1756 1757 struct iscsi_scan_data { 1758 unsigned int channel; 1759 unsigned int id; 1760 u64 lun; 1761 enum scsi_scan_mode rescan; 1762 }; 1763 1764 static int iscsi_user_scan_session(struct device *dev, void *data) 1765 { 1766 struct iscsi_scan_data *scan_data = data; 1767 struct iscsi_cls_session *session; 1768 struct Scsi_Host *shost; 1769 struct iscsi_cls_host *ihost; 1770 unsigned long flags; 1771 unsigned int id; 1772 1773 if (!iscsi_is_session_dev(dev)) 1774 return 0; 1775 1776 session = iscsi_dev_to_session(dev); 1777 1778 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1779 1780 shost = iscsi_session_to_shost(session); 1781 ihost = shost->shost_data; 1782 1783 mutex_lock(&ihost->mutex); 1784 spin_lock_irqsave(&session->lock, flags); 1785 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1786 spin_unlock_irqrestore(&session->lock, flags); 1787 goto user_scan_exit; 1788 } 1789 id = session->target_id; 1790 spin_unlock_irqrestore(&session->lock, flags); 1791 1792 if (id != ISCSI_MAX_TARGET) { 1793 if ((scan_data->channel == SCAN_WILD_CARD || 1794 scan_data->channel == 0) && 1795 (scan_data->id == SCAN_WILD_CARD || 1796 scan_data->id == id)) { 1797 scsi_scan_target(&session->dev, 0, id, 1798 scan_data->lun, scan_data->rescan); 1799 spin_lock_irqsave(&session->lock, flags); 1800 session->target_state = ISCSI_SESSION_TARGET_SCANNED; 1801 spin_unlock_irqrestore(&session->lock, flags); 1802 } 1803 } 1804 1805 user_scan_exit: 1806 mutex_unlock(&ihost->mutex); 1807 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1808 return 0; 1809 } 1810 1811 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1812 uint id, u64 lun) 1813 { 1814 struct iscsi_scan_data scan_data; 1815 1816 scan_data.channel = channel; 1817 scan_data.id = id; 1818 scan_data.lun = lun; 1819 scan_data.rescan = SCSI_SCAN_MANUAL; 1820 1821 return device_for_each_child(&shost->shost_gendev, &scan_data, 1822 iscsi_user_scan_session); 1823 } 1824 1825 static void iscsi_scan_session(struct work_struct *work) 1826 { 1827 struct iscsi_cls_session *session = 1828 container_of(work, struct iscsi_cls_session, scan_work); 1829 struct iscsi_scan_data scan_data; 1830 1831 scan_data.channel = 0; 1832 scan_data.id = SCAN_WILD_CARD; 1833 scan_data.lun = SCAN_WILD_CARD; 1834 scan_data.rescan = SCSI_SCAN_RESCAN; 1835 1836 iscsi_user_scan_session(&session->dev, &scan_data); 1837 } 1838 1839 /** 1840 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1841 * @cmd: scsi cmd passed to scsi eh handler 1842 * 1843 * If the session is down this function will wait for the recovery 1844 * timer to fire or for the session to be logged back in. If the 1845 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1846 * should pass this error value to the scsi eh. 1847 */ 1848 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1849 { 1850 struct iscsi_cls_session *session = 1851 starget_to_session(scsi_target(cmd->device)); 1852 unsigned long flags; 1853 int ret = 0; 1854 1855 spin_lock_irqsave(&session->lock, flags); 1856 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1857 if (session->state == ISCSI_SESSION_FREE) { 1858 ret = FAST_IO_FAIL; 1859 break; 1860 } 1861 spin_unlock_irqrestore(&session->lock, flags); 1862 msleep(1000); 1863 spin_lock_irqsave(&session->lock, flags); 1864 } 1865 spin_unlock_irqrestore(&session->lock, flags); 1866 return ret; 1867 } 1868 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1869 1870 static void session_recovery_timedout(struct work_struct *work) 1871 { 1872 struct iscsi_cls_session *session = 1873 container_of(work, struct iscsi_cls_session, 1874 recovery_work.work); 1875 unsigned long flags; 1876 1877 iscsi_cls_session_printk(KERN_INFO, session, 1878 "session recovery timed out after %d secs\n", 1879 session->recovery_tmo); 1880 1881 spin_lock_irqsave(&session->lock, flags); 1882 switch (session->state) { 1883 case ISCSI_SESSION_FAILED: 1884 session->state = ISCSI_SESSION_FREE; 1885 break; 1886 case ISCSI_SESSION_LOGGED_IN: 1887 case ISCSI_SESSION_FREE: 1888 /* we raced with the unblock's flush */ 1889 spin_unlock_irqrestore(&session->lock, flags); 1890 return; 1891 } 1892 spin_unlock_irqrestore(&session->lock, flags); 1893 1894 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1895 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1896 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1897 1898 if (session->transport->session_recovery_timedout) 1899 session->transport->session_recovery_timedout(session); 1900 } 1901 1902 static void __iscsi_unblock_session(struct work_struct *work) 1903 { 1904 struct iscsi_cls_session *session = 1905 container_of(work, struct iscsi_cls_session, 1906 unblock_work); 1907 unsigned long flags; 1908 1909 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1910 1911 cancel_delayed_work_sync(&session->recovery_work); 1912 spin_lock_irqsave(&session->lock, flags); 1913 session->state = ISCSI_SESSION_LOGGED_IN; 1914 spin_unlock_irqrestore(&session->lock, flags); 1915 /* start IO */ 1916 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1917 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1918 } 1919 1920 /** 1921 * iscsi_unblock_session - set a session as logged in and start IO. 1922 * @session: iscsi session 1923 * 1924 * Mark a session as ready to accept IO. 1925 */ 1926 void iscsi_unblock_session(struct iscsi_cls_session *session) 1927 { 1928 if (!cancel_work_sync(&session->block_work)) 1929 cancel_delayed_work_sync(&session->recovery_work); 1930 1931 queue_work(session->workq, &session->unblock_work); 1932 /* 1933 * Blocking the session can be done from any context so we only 1934 * queue the block work. Make sure the unblock work has completed 1935 * because it flushes/cancels the other works and updates the state. 1936 */ 1937 flush_work(&session->unblock_work); 1938 } 1939 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1940 1941 static void __iscsi_block_session(struct work_struct *work) 1942 { 1943 struct iscsi_cls_session *session = 1944 container_of(work, struct iscsi_cls_session, 1945 block_work); 1946 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1947 unsigned long flags; 1948 1949 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1950 spin_lock_irqsave(&session->lock, flags); 1951 session->state = ISCSI_SESSION_FAILED; 1952 spin_unlock_irqrestore(&session->lock, flags); 1953 scsi_block_targets(shost, &session->dev); 1954 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1955 if (session->recovery_tmo >= 0) 1956 queue_delayed_work(session->workq, 1957 &session->recovery_work, 1958 session->recovery_tmo * HZ); 1959 } 1960 1961 void iscsi_block_session(struct iscsi_cls_session *session) 1962 { 1963 queue_work(session->workq, &session->block_work); 1964 } 1965 EXPORT_SYMBOL_GPL(iscsi_block_session); 1966 1967 static void __iscsi_unbind_session(struct work_struct *work) 1968 { 1969 struct iscsi_cls_session *session = 1970 container_of(work, struct iscsi_cls_session, 1971 unbind_work); 1972 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1973 struct iscsi_cls_host *ihost = shost->shost_data; 1974 unsigned long flags; 1975 unsigned int target_id; 1976 bool remove_target = true; 1977 1978 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 1979 1980 /* Prevent new scans and make sure scanning is not in progress */ 1981 mutex_lock(&ihost->mutex); 1982 spin_lock_irqsave(&session->lock, flags); 1983 if (session->target_state == ISCSI_SESSION_TARGET_ALLOCATED) { 1984 remove_target = false; 1985 } else if (session->target_state != ISCSI_SESSION_TARGET_SCANNED) { 1986 spin_unlock_irqrestore(&session->lock, flags); 1987 mutex_unlock(&ihost->mutex); 1988 ISCSI_DBG_TRANS_SESSION(session, 1989 "Skipping target unbinding: Session is unbound/unbinding.\n"); 1990 return; 1991 } 1992 1993 session->target_state = ISCSI_SESSION_TARGET_UNBINDING; 1994 target_id = session->target_id; 1995 session->target_id = ISCSI_MAX_TARGET; 1996 spin_unlock_irqrestore(&session->lock, flags); 1997 mutex_unlock(&ihost->mutex); 1998 1999 if (remove_target) 2000 scsi_remove_target(&session->dev); 2001 2002 if (session->ida_used) 2003 ida_free(&iscsi_sess_ida, target_id); 2004 2005 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2006 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2007 2008 spin_lock_irqsave(&session->lock, flags); 2009 session->target_state = ISCSI_SESSION_TARGET_UNBOUND; 2010 spin_unlock_irqrestore(&session->lock, flags); 2011 } 2012 2013 static void __iscsi_destroy_session(struct work_struct *work) 2014 { 2015 struct iscsi_cls_session *session = 2016 container_of(work, struct iscsi_cls_session, destroy_work); 2017 2018 session->transport->destroy_session(session); 2019 } 2020 2021 struct iscsi_cls_session * 2022 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2023 int dd_size) 2024 { 2025 struct iscsi_cls_session *session; 2026 2027 session = kzalloc(sizeof(*session) + dd_size, 2028 GFP_KERNEL); 2029 if (!session) 2030 return NULL; 2031 2032 session->transport = transport; 2033 session->creator = -1; 2034 session->recovery_tmo = 120; 2035 session->recovery_tmo_sysfs_override = false; 2036 session->state = ISCSI_SESSION_FREE; 2037 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2038 INIT_LIST_HEAD(&session->sess_list); 2039 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2040 INIT_WORK(&session->block_work, __iscsi_block_session); 2041 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2042 INIT_WORK(&session->scan_work, iscsi_scan_session); 2043 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2044 spin_lock_init(&session->lock); 2045 2046 /* this is released in the dev's release function */ 2047 scsi_host_get(shost); 2048 session->dev.parent = &shost->shost_gendev; 2049 session->dev.release = iscsi_session_release; 2050 device_initialize(&session->dev); 2051 if (dd_size) 2052 session->dd_data = &session[1]; 2053 2054 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2055 return session; 2056 } 2057 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2058 2059 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2060 { 2061 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2062 unsigned long flags; 2063 int id = 0; 2064 int err; 2065 2066 session->sid = atomic_add_return(1, &iscsi_session_nr); 2067 2068 session->workq = alloc_workqueue("iscsi_ctrl_%d:%d", 2069 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 2070 shost->host_no, session->sid); 2071 if (!session->workq) 2072 return -ENOMEM; 2073 2074 if (target_id == ISCSI_MAX_TARGET) { 2075 id = ida_alloc(&iscsi_sess_ida, GFP_KERNEL); 2076 2077 if (id < 0) { 2078 iscsi_cls_session_printk(KERN_ERR, session, 2079 "Failure in Target ID Allocation\n"); 2080 err = id; 2081 goto destroy_wq; 2082 } 2083 session->target_id = (unsigned int)id; 2084 session->ida_used = true; 2085 } else 2086 session->target_id = target_id; 2087 spin_lock_irqsave(&session->lock, flags); 2088 session->target_state = ISCSI_SESSION_TARGET_ALLOCATED; 2089 spin_unlock_irqrestore(&session->lock, flags); 2090 2091 dev_set_name(&session->dev, "session%u", session->sid); 2092 err = device_add(&session->dev); 2093 if (err) { 2094 iscsi_cls_session_printk(KERN_ERR, session, 2095 "could not register session's dev\n"); 2096 goto release_ida; 2097 } 2098 err = transport_register_device(&session->dev); 2099 if (err) { 2100 iscsi_cls_session_printk(KERN_ERR, session, 2101 "could not register transport's dev\n"); 2102 goto release_dev; 2103 } 2104 2105 spin_lock_irqsave(&sesslock, flags); 2106 list_add(&session->sess_list, &sesslist); 2107 spin_unlock_irqrestore(&sesslock, flags); 2108 2109 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2110 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2111 return 0; 2112 2113 release_dev: 2114 device_del(&session->dev); 2115 release_ida: 2116 if (session->ida_used) 2117 ida_free(&iscsi_sess_ida, session->target_id); 2118 destroy_wq: 2119 destroy_workqueue(session->workq); 2120 return err; 2121 } 2122 EXPORT_SYMBOL_GPL(iscsi_add_session); 2123 2124 /** 2125 * iscsi_create_session - create iscsi class session 2126 * @shost: scsi host 2127 * @transport: iscsi transport 2128 * @dd_size: private driver data size 2129 * @target_id: which target 2130 * 2131 * This can be called from a LLD or iscsi_transport. 2132 */ 2133 struct iscsi_cls_session * 2134 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2135 int dd_size, unsigned int target_id) 2136 { 2137 struct iscsi_cls_session *session; 2138 2139 session = iscsi_alloc_session(shost, transport, dd_size); 2140 if (!session) 2141 return NULL; 2142 2143 if (iscsi_add_session(session, target_id)) { 2144 iscsi_free_session(session); 2145 return NULL; 2146 } 2147 return session; 2148 } 2149 EXPORT_SYMBOL_GPL(iscsi_create_session); 2150 2151 static void iscsi_conn_release(struct device *dev) 2152 { 2153 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2154 struct device *parent = conn->dev.parent; 2155 2156 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2157 kfree(conn); 2158 put_device(parent); 2159 } 2160 2161 static int iscsi_is_conn_dev(const struct device *dev) 2162 { 2163 return dev->release == iscsi_conn_release; 2164 } 2165 2166 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2167 { 2168 if (!iscsi_is_conn_dev(dev)) 2169 return 0; 2170 2171 iscsi_remove_conn(iscsi_dev_to_conn(dev)); 2172 return 0; 2173 } 2174 2175 void iscsi_remove_session(struct iscsi_cls_session *session) 2176 { 2177 unsigned long flags; 2178 int err; 2179 2180 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2181 2182 spin_lock_irqsave(&sesslock, flags); 2183 if (!list_empty(&session->sess_list)) 2184 list_del(&session->sess_list); 2185 spin_unlock_irqrestore(&sesslock, flags); 2186 2187 if (!cancel_work_sync(&session->block_work)) 2188 cancel_delayed_work_sync(&session->recovery_work); 2189 cancel_work_sync(&session->unblock_work); 2190 /* 2191 * If we are blocked let commands flow again. The lld or iscsi 2192 * layer should set up the queuecommand to fail commands. 2193 * We assume that LLD will not be calling block/unblock while 2194 * removing the session. 2195 */ 2196 spin_lock_irqsave(&session->lock, flags); 2197 session->state = ISCSI_SESSION_FREE; 2198 spin_unlock_irqrestore(&session->lock, flags); 2199 2200 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2201 /* 2202 * qla4xxx can perform it's own scans when it runs in kernel only 2203 * mode. Make sure to flush those scans. 2204 */ 2205 flush_work(&session->scan_work); 2206 /* flush running unbind operations */ 2207 flush_work(&session->unbind_work); 2208 __iscsi_unbind_session(&session->unbind_work); 2209 2210 /* hw iscsi may not have removed all connections from session */ 2211 err = device_for_each_child(&session->dev, NULL, 2212 iscsi_iter_destroy_conn_fn); 2213 if (err) 2214 iscsi_cls_session_printk(KERN_ERR, session, 2215 "Could not delete all connections " 2216 "for session. Error %d.\n", err); 2217 2218 transport_unregister_device(&session->dev); 2219 2220 destroy_workqueue(session->workq); 2221 2222 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2223 device_del(&session->dev); 2224 } 2225 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2226 2227 static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag) 2228 { 2229 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n"); 2230 2231 switch (flag) { 2232 case STOP_CONN_RECOVER: 2233 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2234 break; 2235 case STOP_CONN_TERM: 2236 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2237 break; 2238 default: 2239 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n", 2240 flag); 2241 return; 2242 } 2243 2244 conn->transport->stop_conn(conn, flag); 2245 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n"); 2246 } 2247 2248 static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active) 2249 { 2250 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2251 struct iscsi_endpoint *ep; 2252 2253 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n"); 2254 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2255 2256 if (!conn->ep || !session->transport->ep_disconnect) 2257 return; 2258 2259 ep = conn->ep; 2260 conn->ep = NULL; 2261 2262 session->transport->unbind_conn(conn, is_active); 2263 session->transport->ep_disconnect(ep); 2264 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n"); 2265 } 2266 2267 static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn, 2268 struct iscsi_endpoint *ep, 2269 bool is_active) 2270 { 2271 /* Check if this was a conn error and the kernel took ownership */ 2272 spin_lock_irq(&conn->lock); 2273 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2274 spin_unlock_irq(&conn->lock); 2275 iscsi_ep_disconnect(conn, is_active); 2276 } else { 2277 spin_unlock_irq(&conn->lock); 2278 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n"); 2279 mutex_unlock(&conn->ep_mutex); 2280 2281 flush_work(&conn->cleanup_work); 2282 /* 2283 * Userspace is now done with the EP so we can release the ref 2284 * iscsi_cleanup_conn_work_fn took. 2285 */ 2286 iscsi_put_endpoint(ep); 2287 mutex_lock(&conn->ep_mutex); 2288 } 2289 } 2290 2291 static int iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2292 { 2293 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n"); 2294 /* 2295 * For offload, iscsid may not know about the ep like when iscsid is 2296 * restarted or for kernel based session shutdown iscsid is not even 2297 * up. For these cases, we do the disconnect now. 2298 */ 2299 mutex_lock(&conn->ep_mutex); 2300 if (conn->ep) 2301 iscsi_if_disconnect_bound_ep(conn, conn->ep, true); 2302 mutex_unlock(&conn->ep_mutex); 2303 2304 /* 2305 * If this is a termination we have to call stop_conn with that flag 2306 * so the correct states get set. If we haven't run the work yet try to 2307 * avoid the extra run. 2308 */ 2309 if (flag == STOP_CONN_TERM) { 2310 cancel_work_sync(&conn->cleanup_work); 2311 iscsi_stop_conn(conn, flag); 2312 } else { 2313 /* 2314 * Figure out if it was the kernel or userspace initiating this. 2315 */ 2316 spin_lock_irq(&conn->lock); 2317 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2318 spin_unlock_irq(&conn->lock); 2319 iscsi_stop_conn(conn, flag); 2320 } else { 2321 spin_unlock_irq(&conn->lock); 2322 ISCSI_DBG_TRANS_CONN(conn, 2323 "flush kernel conn cleanup.\n"); 2324 flush_work(&conn->cleanup_work); 2325 } 2326 /* 2327 * Only clear for recovery to avoid extra cleanup runs during 2328 * termination. 2329 */ 2330 spin_lock_irq(&conn->lock); 2331 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags); 2332 spin_unlock_irq(&conn->lock); 2333 } 2334 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n"); 2335 return 0; 2336 } 2337 2338 static void iscsi_cleanup_conn_work_fn(struct work_struct *work) 2339 { 2340 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn, 2341 cleanup_work); 2342 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2343 2344 mutex_lock(&conn->ep_mutex); 2345 /* 2346 * Get a ref to the ep, so we don't release its ID until after 2347 * userspace is done referencing it in iscsi_if_disconnect_bound_ep. 2348 */ 2349 if (conn->ep) 2350 get_device(&conn->ep->dev); 2351 iscsi_ep_disconnect(conn, false); 2352 2353 if (system_state != SYSTEM_RUNNING) { 2354 /* 2355 * If the user has set up for the session to never timeout 2356 * then hang like they wanted. For all other cases fail right 2357 * away since userspace is not going to relogin. 2358 */ 2359 if (session->recovery_tmo > 0) 2360 session->recovery_tmo = 0; 2361 } 2362 2363 iscsi_stop_conn(conn, STOP_CONN_RECOVER); 2364 mutex_unlock(&conn->ep_mutex); 2365 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n"); 2366 } 2367 2368 static int iscsi_iter_force_destroy_conn_fn(struct device *dev, void *data) 2369 { 2370 struct iscsi_transport *transport; 2371 struct iscsi_cls_conn *conn; 2372 2373 if (!iscsi_is_conn_dev(dev)) 2374 return 0; 2375 2376 conn = iscsi_dev_to_conn(dev); 2377 transport = conn->transport; 2378 2379 if (READ_ONCE(conn->state) != ISCSI_CONN_DOWN) 2380 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2381 2382 transport->destroy_conn(conn); 2383 return 0; 2384 } 2385 2386 /** 2387 * iscsi_force_destroy_session - destroy a session from the kernel 2388 * @session: session to destroy 2389 * 2390 * Force the destruction of a session from the kernel. This should only be 2391 * used when userspace is no longer running during system shutdown. 2392 */ 2393 void iscsi_force_destroy_session(struct iscsi_cls_session *session) 2394 { 2395 struct iscsi_transport *transport = session->transport; 2396 unsigned long flags; 2397 2398 WARN_ON_ONCE(system_state == SYSTEM_RUNNING); 2399 2400 spin_lock_irqsave(&sesslock, flags); 2401 if (list_empty(&session->sess_list)) { 2402 spin_unlock_irqrestore(&sesslock, flags); 2403 /* 2404 * Conn/ep is already freed. Session is being torn down via 2405 * async path. For shutdown we don't care about it so return. 2406 */ 2407 return; 2408 } 2409 spin_unlock_irqrestore(&sesslock, flags); 2410 2411 device_for_each_child(&session->dev, NULL, 2412 iscsi_iter_force_destroy_conn_fn); 2413 transport->destroy_session(session); 2414 } 2415 EXPORT_SYMBOL_GPL(iscsi_force_destroy_session); 2416 2417 void iscsi_free_session(struct iscsi_cls_session *session) 2418 { 2419 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2420 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2421 put_device(&session->dev); 2422 } 2423 EXPORT_SYMBOL_GPL(iscsi_free_session); 2424 2425 /** 2426 * iscsi_alloc_conn - alloc iscsi class connection 2427 * @session: iscsi cls session 2428 * @dd_size: private driver data size 2429 * @cid: connection id 2430 */ 2431 struct iscsi_cls_conn * 2432 iscsi_alloc_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2433 { 2434 struct iscsi_transport *transport = session->transport; 2435 struct iscsi_cls_conn *conn; 2436 2437 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2438 if (!conn) 2439 return NULL; 2440 if (dd_size) 2441 conn->dd_data = &conn[1]; 2442 2443 mutex_init(&conn->ep_mutex); 2444 spin_lock_init(&conn->lock); 2445 INIT_LIST_HEAD(&conn->conn_list); 2446 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn); 2447 conn->transport = transport; 2448 conn->cid = cid; 2449 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2450 2451 /* this is released in the dev's release function */ 2452 if (!get_device(&session->dev)) 2453 goto free_conn; 2454 2455 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2456 device_initialize(&conn->dev); 2457 conn->dev.parent = &session->dev; 2458 conn->dev.release = iscsi_conn_release; 2459 2460 return conn; 2461 2462 free_conn: 2463 kfree(conn); 2464 return NULL; 2465 } 2466 EXPORT_SYMBOL_GPL(iscsi_alloc_conn); 2467 2468 /** 2469 * iscsi_add_conn - add iscsi class connection 2470 * @conn: iscsi cls connection 2471 * 2472 * This will expose iscsi_cls_conn to sysfs so make sure the related 2473 * resources for sysfs attributes are initialized before calling this. 2474 */ 2475 int iscsi_add_conn(struct iscsi_cls_conn *conn) 2476 { 2477 int err; 2478 unsigned long flags; 2479 struct iscsi_cls_session *session = iscsi_dev_to_session(conn->dev.parent); 2480 2481 err = device_add(&conn->dev); 2482 if (err) { 2483 iscsi_cls_session_printk(KERN_ERR, session, 2484 "could not register connection's dev\n"); 2485 return err; 2486 } 2487 err = transport_register_device(&conn->dev); 2488 if (err) { 2489 iscsi_cls_session_printk(KERN_ERR, session, 2490 "could not register transport's dev\n"); 2491 device_del(&conn->dev); 2492 return err; 2493 } 2494 2495 spin_lock_irqsave(&connlock, flags); 2496 list_add(&conn->conn_list, &connlist); 2497 spin_unlock_irqrestore(&connlock, flags); 2498 2499 return 0; 2500 } 2501 EXPORT_SYMBOL_GPL(iscsi_add_conn); 2502 2503 /** 2504 * iscsi_remove_conn - remove iscsi class connection from sysfs 2505 * @conn: iscsi cls connection 2506 * 2507 * Remove iscsi_cls_conn from sysfs, and wait for previous 2508 * read/write of iscsi_cls_conn's attributes in sysfs to finish. 2509 */ 2510 void iscsi_remove_conn(struct iscsi_cls_conn *conn) 2511 { 2512 unsigned long flags; 2513 2514 spin_lock_irqsave(&connlock, flags); 2515 list_del(&conn->conn_list); 2516 spin_unlock_irqrestore(&connlock, flags); 2517 2518 transport_unregister_device(&conn->dev); 2519 device_del(&conn->dev); 2520 } 2521 EXPORT_SYMBOL_GPL(iscsi_remove_conn); 2522 2523 void iscsi_put_conn(struct iscsi_cls_conn *conn) 2524 { 2525 put_device(&conn->dev); 2526 } 2527 EXPORT_SYMBOL_GPL(iscsi_put_conn); 2528 2529 void iscsi_get_conn(struct iscsi_cls_conn *conn) 2530 { 2531 get_device(&conn->dev); 2532 } 2533 EXPORT_SYMBOL_GPL(iscsi_get_conn); 2534 2535 /* 2536 * iscsi interface functions 2537 */ 2538 static struct iscsi_internal * 2539 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2540 { 2541 struct iscsi_internal *priv; 2542 unsigned long flags; 2543 2544 spin_lock_irqsave(&iscsi_transport_lock, flags); 2545 list_for_each_entry(priv, &iscsi_transports, list) { 2546 if (tt == priv->iscsi_transport) { 2547 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2548 return priv; 2549 } 2550 } 2551 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2552 return NULL; 2553 } 2554 2555 static int 2556 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2557 { 2558 return nlmsg_multicast(nls, skb, 0, group, gfp); 2559 } 2560 2561 static int 2562 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2563 { 2564 return nlmsg_unicast(nls, skb, portid); 2565 } 2566 2567 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2568 char *data, uint32_t data_size) 2569 { 2570 struct nlmsghdr *nlh; 2571 struct sk_buff *skb; 2572 struct iscsi_uevent *ev; 2573 char *pdu; 2574 struct iscsi_internal *priv; 2575 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2576 data_size); 2577 2578 priv = iscsi_if_transport_lookup(conn->transport); 2579 if (!priv) 2580 return -EINVAL; 2581 2582 skb = alloc_skb(len, GFP_ATOMIC); 2583 if (!skb) { 2584 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2585 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2586 "control PDU: OOM\n"); 2587 return -ENOMEM; 2588 } 2589 2590 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2591 ev = nlmsg_data(nlh); 2592 memset(ev, 0, sizeof(*ev)); 2593 ev->transport_handle = iscsi_handle(conn->transport); 2594 ev->type = ISCSI_KEVENT_RECV_PDU; 2595 ev->r.recv_req.cid = conn->cid; 2596 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2597 pdu = (char*)ev + sizeof(*ev); 2598 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2599 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2600 2601 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2602 } 2603 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2604 2605 int iscsi_offload_mesg(struct Scsi_Host *shost, 2606 struct iscsi_transport *transport, uint32_t type, 2607 char *data, uint16_t data_size) 2608 { 2609 struct nlmsghdr *nlh; 2610 struct sk_buff *skb; 2611 struct iscsi_uevent *ev; 2612 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2613 2614 skb = alloc_skb(len, GFP_ATOMIC); 2615 if (!skb) { 2616 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2617 return -ENOMEM; 2618 } 2619 2620 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2621 ev = nlmsg_data(nlh); 2622 memset(ev, 0, sizeof(*ev)); 2623 ev->type = type; 2624 ev->transport_handle = iscsi_handle(transport); 2625 switch (type) { 2626 case ISCSI_KEVENT_PATH_REQ: 2627 ev->r.req_path.host_no = shost->host_no; 2628 break; 2629 case ISCSI_KEVENT_IF_DOWN: 2630 ev->r.notify_if_down.host_no = shost->host_no; 2631 break; 2632 } 2633 2634 memcpy((char *)ev + sizeof(*ev), data, data_size); 2635 2636 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2637 } 2638 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2639 2640 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2641 { 2642 struct nlmsghdr *nlh; 2643 struct sk_buff *skb; 2644 struct iscsi_uevent *ev; 2645 struct iscsi_internal *priv; 2646 int len = nlmsg_total_size(sizeof(*ev)); 2647 unsigned long flags; 2648 int state; 2649 2650 spin_lock_irqsave(&conn->lock, flags); 2651 /* 2652 * Userspace will only do a stop call if we are at least bound. And, we 2653 * only need to do the in kernel cleanup if in the UP state so cmds can 2654 * be released to upper layers. If in other states just wait for 2655 * userspace to avoid races that can leave the cleanup_work queued. 2656 */ 2657 state = READ_ONCE(conn->state); 2658 switch (state) { 2659 case ISCSI_CONN_BOUND: 2660 case ISCSI_CONN_UP: 2661 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, 2662 &conn->flags)) { 2663 queue_work(iscsi_conn_cleanup_workq, 2664 &conn->cleanup_work); 2665 } 2666 break; 2667 default: 2668 ISCSI_DBG_TRANS_CONN(conn, "Got conn error in state %d\n", 2669 state); 2670 break; 2671 } 2672 spin_unlock_irqrestore(&conn->lock, flags); 2673 2674 priv = iscsi_if_transport_lookup(conn->transport); 2675 if (!priv) 2676 return; 2677 2678 skb = alloc_skb(len, GFP_ATOMIC); 2679 if (!skb) { 2680 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2681 "conn error (%d)\n", error); 2682 return; 2683 } 2684 2685 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2686 ev = nlmsg_data(nlh); 2687 ev->transport_handle = iscsi_handle(conn->transport); 2688 ev->type = ISCSI_KEVENT_CONN_ERROR; 2689 ev->r.connerror.error = error; 2690 ev->r.connerror.cid = conn->cid; 2691 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2692 2693 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2694 2695 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2696 error); 2697 } 2698 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2699 2700 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2701 enum iscsi_conn_state state) 2702 { 2703 struct nlmsghdr *nlh; 2704 struct sk_buff *skb; 2705 struct iscsi_uevent *ev; 2706 struct iscsi_internal *priv; 2707 int len = nlmsg_total_size(sizeof(*ev)); 2708 2709 priv = iscsi_if_transport_lookup(conn->transport); 2710 if (!priv) 2711 return; 2712 2713 skb = alloc_skb(len, GFP_ATOMIC); 2714 if (!skb) { 2715 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2716 "conn login (%d)\n", state); 2717 return; 2718 } 2719 2720 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2721 ev = nlmsg_data(nlh); 2722 ev->transport_handle = iscsi_handle(conn->transport); 2723 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2724 ev->r.conn_login.state = state; 2725 ev->r.conn_login.cid = conn->cid; 2726 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2727 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2728 2729 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2730 state); 2731 } 2732 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2733 2734 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2735 enum iscsi_host_event_code code, uint32_t data_size, 2736 uint8_t *data) 2737 { 2738 struct nlmsghdr *nlh; 2739 struct sk_buff *skb; 2740 struct iscsi_uevent *ev; 2741 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2742 2743 skb = alloc_skb(len, GFP_NOIO); 2744 if (!skb) { 2745 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2746 host_no, code); 2747 return; 2748 } 2749 2750 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2751 ev = nlmsg_data(nlh); 2752 ev->transport_handle = iscsi_handle(transport); 2753 ev->type = ISCSI_KEVENT_HOST_EVENT; 2754 ev->r.host_event.host_no = host_no; 2755 ev->r.host_event.code = code; 2756 ev->r.host_event.data_size = data_size; 2757 2758 if (data_size) 2759 memcpy((char *)ev + sizeof(*ev), data, data_size); 2760 2761 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2762 } 2763 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2764 2765 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2766 uint32_t status, uint32_t pid, uint32_t data_size, 2767 uint8_t *data) 2768 { 2769 struct nlmsghdr *nlh; 2770 struct sk_buff *skb; 2771 struct iscsi_uevent *ev; 2772 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2773 2774 skb = alloc_skb(len, GFP_NOIO); 2775 if (!skb) { 2776 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2777 return; 2778 } 2779 2780 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2781 ev = nlmsg_data(nlh); 2782 ev->transport_handle = iscsi_handle(transport); 2783 ev->type = ISCSI_KEVENT_PING_COMP; 2784 ev->r.ping_comp.host_no = host_no; 2785 ev->r.ping_comp.status = status; 2786 ev->r.ping_comp.pid = pid; 2787 ev->r.ping_comp.data_size = data_size; 2788 memcpy((char *)ev + sizeof(*ev), data, data_size); 2789 2790 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2791 } 2792 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2793 2794 static int 2795 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2796 { 2797 struct sk_buff *skb; 2798 struct nlmsghdr *nlh; 2799 int len = nlmsg_total_size(size); 2800 2801 skb = alloc_skb(len, GFP_ATOMIC); 2802 if (!skb) { 2803 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2804 return -ENOMEM; 2805 } 2806 2807 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2808 memcpy(nlmsg_data(nlh), payload, size); 2809 return iscsi_unicast_skb(skb, portid); 2810 } 2811 2812 static int 2813 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2814 { 2815 struct iscsi_uevent *ev = nlmsg_data(nlh); 2816 struct iscsi_stats *stats; 2817 struct sk_buff *skbstat; 2818 struct iscsi_cls_conn *conn; 2819 struct nlmsghdr *nlhstat; 2820 struct iscsi_uevent *evstat; 2821 struct iscsi_internal *priv; 2822 int len = nlmsg_total_size(sizeof(*ev) + 2823 sizeof(struct iscsi_stats) + 2824 sizeof(struct iscsi_stats_custom) * 2825 ISCSI_STATS_CUSTOM_MAX); 2826 int err = 0; 2827 2828 priv = iscsi_if_transport_lookup(transport); 2829 if (!priv) 2830 return -EINVAL; 2831 2832 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2833 if (!conn) 2834 return -EEXIST; 2835 2836 do { 2837 int actual_size; 2838 2839 skbstat = alloc_skb(len, GFP_ATOMIC); 2840 if (!skbstat) { 2841 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2842 "deliver stats: OOM\n"); 2843 return -ENOMEM; 2844 } 2845 2846 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2847 (len - sizeof(*nlhstat)), 0); 2848 evstat = nlmsg_data(nlhstat); 2849 memset(evstat, 0, sizeof(*evstat)); 2850 evstat->transport_handle = iscsi_handle(conn->transport); 2851 evstat->type = nlh->nlmsg_type; 2852 evstat->u.get_stats.cid = 2853 ev->u.get_stats.cid; 2854 evstat->u.get_stats.sid = 2855 ev->u.get_stats.sid; 2856 stats = (struct iscsi_stats *) 2857 ((char*)evstat + sizeof(*evstat)); 2858 memset(stats, 0, sizeof(*stats)); 2859 2860 transport->get_stats(conn, stats); 2861 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2862 sizeof(struct iscsi_stats) + 2863 sizeof(struct iscsi_stats_custom) * 2864 stats->custom_length); 2865 actual_size -= sizeof(*nlhstat); 2866 actual_size = nlmsg_msg_size(actual_size); 2867 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2868 nlhstat->nlmsg_len = actual_size; 2869 2870 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2871 GFP_ATOMIC); 2872 } while (err < 0 && err != -ECONNREFUSED); 2873 2874 return err; 2875 } 2876 2877 /** 2878 * iscsi_session_event - send session destr. completion event 2879 * @session: iscsi class session 2880 * @event: type of event 2881 */ 2882 int iscsi_session_event(struct iscsi_cls_session *session, 2883 enum iscsi_uevent_e event) 2884 { 2885 struct iscsi_internal *priv; 2886 struct Scsi_Host *shost; 2887 struct iscsi_uevent *ev; 2888 struct sk_buff *skb; 2889 struct nlmsghdr *nlh; 2890 int rc, len = nlmsg_total_size(sizeof(*ev)); 2891 2892 priv = iscsi_if_transport_lookup(session->transport); 2893 if (!priv) 2894 return -EINVAL; 2895 shost = iscsi_session_to_shost(session); 2896 2897 skb = alloc_skb(len, GFP_KERNEL); 2898 if (!skb) { 2899 iscsi_cls_session_printk(KERN_ERR, session, 2900 "Cannot notify userspace of session " 2901 "event %u\n", event); 2902 return -ENOMEM; 2903 } 2904 2905 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2906 ev = nlmsg_data(nlh); 2907 ev->transport_handle = iscsi_handle(session->transport); 2908 2909 ev->type = event; 2910 switch (event) { 2911 case ISCSI_KEVENT_DESTROY_SESSION: 2912 ev->r.d_session.host_no = shost->host_no; 2913 ev->r.d_session.sid = session->sid; 2914 break; 2915 case ISCSI_KEVENT_CREATE_SESSION: 2916 ev->r.c_session_ret.host_no = shost->host_no; 2917 ev->r.c_session_ret.sid = session->sid; 2918 break; 2919 case ISCSI_KEVENT_UNBIND_SESSION: 2920 ev->r.unbind_session.host_no = shost->host_no; 2921 ev->r.unbind_session.sid = session->sid; 2922 break; 2923 default: 2924 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2925 "%u.\n", event); 2926 kfree_skb(skb); 2927 return -EINVAL; 2928 } 2929 2930 /* 2931 * this will occur if the daemon is not up, so we just warn 2932 * the user and when the daemon is restarted it will handle it 2933 */ 2934 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2935 if (rc == -ESRCH) 2936 iscsi_cls_session_printk(KERN_ERR, session, 2937 "Cannot notify userspace of session " 2938 "event %u. Check iscsi daemon\n", 2939 event); 2940 2941 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2942 event, rc); 2943 return rc; 2944 } 2945 EXPORT_SYMBOL_GPL(iscsi_session_event); 2946 2947 static int 2948 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2949 struct iscsi_uevent *ev, pid_t pid, 2950 uint32_t initial_cmdsn, uint16_t cmds_max, 2951 uint16_t queue_depth) 2952 { 2953 struct iscsi_transport *transport = priv->iscsi_transport; 2954 struct iscsi_cls_session *session; 2955 struct Scsi_Host *shost; 2956 2957 session = transport->create_session(ep, cmds_max, queue_depth, 2958 initial_cmdsn); 2959 if (!session) 2960 return -ENOMEM; 2961 2962 session->creator = pid; 2963 shost = iscsi_session_to_shost(session); 2964 ev->r.c_session_ret.host_no = shost->host_no; 2965 ev->r.c_session_ret.sid = session->sid; 2966 ISCSI_DBG_TRANS_SESSION(session, 2967 "Completed creating transport session\n"); 2968 return 0; 2969 } 2970 2971 static int 2972 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2973 { 2974 struct iscsi_cls_conn *conn; 2975 struct iscsi_cls_session *session; 2976 2977 session = iscsi_session_lookup(ev->u.c_conn.sid); 2978 if (!session) { 2979 printk(KERN_ERR "iscsi: invalid session %d.\n", 2980 ev->u.c_conn.sid); 2981 return -EINVAL; 2982 } 2983 2984 conn = transport->create_conn(session, ev->u.c_conn.cid); 2985 if (!conn) { 2986 iscsi_cls_session_printk(KERN_ERR, session, 2987 "couldn't create a new connection."); 2988 return -ENOMEM; 2989 } 2990 2991 ev->r.c_conn_ret.sid = session->sid; 2992 ev->r.c_conn_ret.cid = conn->cid; 2993 2994 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2995 return 0; 2996 } 2997 2998 static int 2999 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3000 { 3001 struct iscsi_cls_conn *conn; 3002 3003 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 3004 if (!conn) 3005 return -EINVAL; 3006 3007 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n"); 3008 flush_work(&conn->cleanup_work); 3009 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 3010 3011 if (transport->destroy_conn) 3012 transport->destroy_conn(conn); 3013 return 0; 3014 } 3015 3016 static int 3017 iscsi_if_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3018 { 3019 char *data = (char*)ev + sizeof(*ev); 3020 struct iscsi_cls_conn *conn; 3021 struct iscsi_cls_session *session; 3022 int err = 0, value = 0, state; 3023 3024 if (ev->u.set_param.len > PAGE_SIZE) 3025 return -EINVAL; 3026 3027 session = iscsi_session_lookup(ev->u.set_param.sid); 3028 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 3029 if (!conn || !session) 3030 return -EINVAL; 3031 3032 switch (ev->u.set_param.param) { 3033 case ISCSI_PARAM_SESS_RECOVERY_TMO: 3034 sscanf(data, "%d", &value); 3035 if (!session->recovery_tmo_sysfs_override) 3036 session->recovery_tmo = value; 3037 break; 3038 default: 3039 state = READ_ONCE(conn->state); 3040 if (state == ISCSI_CONN_BOUND || state == ISCSI_CONN_UP) { 3041 err = transport->set_param(conn, ev->u.set_param.param, 3042 data, ev->u.set_param.len); 3043 } else { 3044 return -ENOTCONN; 3045 } 3046 } 3047 3048 return err; 3049 } 3050 3051 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 3052 struct iscsi_uevent *ev, int msg_type) 3053 { 3054 struct iscsi_endpoint *ep; 3055 struct sockaddr *dst_addr; 3056 struct Scsi_Host *shost = NULL; 3057 int non_blocking, err = 0; 3058 3059 if (!transport->ep_connect) 3060 return -EINVAL; 3061 3062 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 3063 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 3064 if (!shost) { 3065 printk(KERN_ERR "ep connect failed. Could not find " 3066 "host no %u\n", 3067 ev->u.ep_connect_through_host.host_no); 3068 return -ENODEV; 3069 } 3070 non_blocking = ev->u.ep_connect_through_host.non_blocking; 3071 } else 3072 non_blocking = ev->u.ep_connect.non_blocking; 3073 3074 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3075 ep = transport->ep_connect(shost, dst_addr, non_blocking); 3076 if (IS_ERR(ep)) { 3077 err = PTR_ERR(ep); 3078 goto release_host; 3079 } 3080 3081 ev->r.ep_connect_ret.handle = ep->id; 3082 release_host: 3083 if (shost) 3084 scsi_host_put(shost); 3085 return err; 3086 } 3087 3088 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 3089 u64 ep_handle) 3090 { 3091 struct iscsi_cls_conn *conn; 3092 struct iscsi_endpoint *ep; 3093 3094 if (!transport->ep_disconnect) 3095 return -EINVAL; 3096 3097 ep = iscsi_lookup_endpoint(ep_handle); 3098 if (!ep) 3099 return -EINVAL; 3100 3101 conn = ep->conn; 3102 if (!conn) { 3103 /* 3104 * conn was not even bound yet, so we can't get iscsi conn 3105 * failures yet. 3106 */ 3107 transport->ep_disconnect(ep); 3108 goto put_ep; 3109 } 3110 3111 mutex_lock(&conn->ep_mutex); 3112 iscsi_if_disconnect_bound_ep(conn, ep, false); 3113 mutex_unlock(&conn->ep_mutex); 3114 put_ep: 3115 iscsi_put_endpoint(ep); 3116 return 0; 3117 } 3118 3119 static int 3120 iscsi_if_transport_ep(struct iscsi_transport *transport, 3121 struct iscsi_uevent *ev, int msg_type) 3122 { 3123 struct iscsi_endpoint *ep; 3124 int rc = 0; 3125 3126 switch (msg_type) { 3127 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3128 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3129 rc = iscsi_if_ep_connect(transport, ev, msg_type); 3130 break; 3131 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3132 if (!transport->ep_poll) 3133 return -EINVAL; 3134 3135 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 3136 if (!ep) 3137 return -EINVAL; 3138 3139 ev->r.retcode = transport->ep_poll(ep, 3140 ev->u.ep_poll.timeout_ms); 3141 iscsi_put_endpoint(ep); 3142 break; 3143 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3144 rc = iscsi_if_ep_disconnect(transport, 3145 ev->u.ep_disconnect.ep_handle); 3146 break; 3147 } 3148 return rc; 3149 } 3150 3151 static int 3152 iscsi_tgt_dscvr(struct iscsi_transport *transport, 3153 struct iscsi_uevent *ev) 3154 { 3155 struct Scsi_Host *shost; 3156 struct sockaddr *dst_addr; 3157 int err; 3158 3159 if (!transport->tgt_dscvr) 3160 return -EINVAL; 3161 3162 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3163 if (!shost) { 3164 printk(KERN_ERR "target discovery could not find host no %u\n", 3165 ev->u.tgt_dscvr.host_no); 3166 return -ENODEV; 3167 } 3168 3169 3170 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3171 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3172 ev->u.tgt_dscvr.enable, dst_addr); 3173 scsi_host_put(shost); 3174 return err; 3175 } 3176 3177 static int 3178 iscsi_set_host_param(struct iscsi_transport *transport, 3179 struct iscsi_uevent *ev) 3180 { 3181 char *data = (char*)ev + sizeof(*ev); 3182 struct Scsi_Host *shost; 3183 int err; 3184 3185 if (!transport->set_host_param) 3186 return -ENOSYS; 3187 3188 if (ev->u.set_host_param.len > PAGE_SIZE) 3189 return -EINVAL; 3190 3191 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3192 if (!shost) { 3193 printk(KERN_ERR "set_host_param could not find host no %u\n", 3194 ev->u.set_host_param.host_no); 3195 return -ENODEV; 3196 } 3197 3198 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3199 data, ev->u.set_host_param.len); 3200 scsi_host_put(shost); 3201 return err; 3202 } 3203 3204 static int 3205 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3206 { 3207 struct Scsi_Host *shost; 3208 struct iscsi_path *params; 3209 int err; 3210 3211 if (!transport->set_path) 3212 return -ENOSYS; 3213 3214 shost = scsi_host_lookup(ev->u.set_path.host_no); 3215 if (!shost) { 3216 printk(KERN_ERR "set path could not find host no %u\n", 3217 ev->u.set_path.host_no); 3218 return -ENODEV; 3219 } 3220 3221 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3222 err = transport->set_path(shost, params); 3223 3224 scsi_host_put(shost); 3225 return err; 3226 } 3227 3228 static int iscsi_session_has_conns(int sid) 3229 { 3230 struct iscsi_cls_conn *conn; 3231 unsigned long flags; 3232 int found = 0; 3233 3234 spin_lock_irqsave(&connlock, flags); 3235 list_for_each_entry(conn, &connlist, conn_list) { 3236 if (iscsi_conn_get_sid(conn) == sid) { 3237 found = 1; 3238 break; 3239 } 3240 } 3241 spin_unlock_irqrestore(&connlock, flags); 3242 3243 return found; 3244 } 3245 3246 static int 3247 iscsi_set_iface_params(struct iscsi_transport *transport, 3248 struct iscsi_uevent *ev, uint32_t len) 3249 { 3250 char *data = (char *)ev + sizeof(*ev); 3251 struct Scsi_Host *shost; 3252 int err; 3253 3254 if (!transport->set_iface_param) 3255 return -ENOSYS; 3256 3257 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3258 if (!shost) { 3259 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3260 ev->u.set_iface_params.host_no); 3261 return -ENODEV; 3262 } 3263 3264 err = transport->set_iface_param(shost, data, len); 3265 scsi_host_put(shost); 3266 return err; 3267 } 3268 3269 static int 3270 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3271 { 3272 struct Scsi_Host *shost; 3273 struct sockaddr *dst_addr; 3274 int err; 3275 3276 if (!transport->send_ping) 3277 return -ENOSYS; 3278 3279 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3280 if (!shost) { 3281 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3282 ev->u.iscsi_ping.host_no); 3283 return -ENODEV; 3284 } 3285 3286 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3287 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3288 ev->u.iscsi_ping.iface_type, 3289 ev->u.iscsi_ping.payload_size, 3290 ev->u.iscsi_ping.pid, 3291 dst_addr); 3292 scsi_host_put(shost); 3293 return err; 3294 } 3295 3296 static int 3297 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3298 { 3299 struct iscsi_uevent *ev = nlmsg_data(nlh); 3300 struct Scsi_Host *shost = NULL; 3301 struct iscsi_chap_rec *chap_rec; 3302 struct iscsi_internal *priv; 3303 struct sk_buff *skbchap; 3304 struct nlmsghdr *nlhchap; 3305 struct iscsi_uevent *evchap; 3306 uint32_t chap_buf_size; 3307 int len, err = 0; 3308 char *buf; 3309 3310 if (!transport->get_chap) 3311 return -EINVAL; 3312 3313 priv = iscsi_if_transport_lookup(transport); 3314 if (!priv) 3315 return -EINVAL; 3316 3317 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3318 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3319 3320 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3321 if (!shost) { 3322 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3323 __func__, ev->u.get_chap.host_no); 3324 return -ENODEV; 3325 } 3326 3327 do { 3328 int actual_size; 3329 3330 skbchap = alloc_skb(len, GFP_KERNEL); 3331 if (!skbchap) { 3332 printk(KERN_ERR "can not deliver chap: OOM\n"); 3333 err = -ENOMEM; 3334 goto exit_get_chap; 3335 } 3336 3337 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3338 (len - sizeof(*nlhchap)), 0); 3339 evchap = nlmsg_data(nlhchap); 3340 memset(evchap, 0, sizeof(*evchap)); 3341 evchap->transport_handle = iscsi_handle(transport); 3342 evchap->type = nlh->nlmsg_type; 3343 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3344 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3345 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3346 buf = (char *)evchap + sizeof(*evchap); 3347 memset(buf, 0, chap_buf_size); 3348 3349 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3350 &evchap->u.get_chap.num_entries, buf); 3351 3352 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3353 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3354 nlhchap->nlmsg_len = actual_size; 3355 3356 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3357 GFP_KERNEL); 3358 } while (err < 0 && err != -ECONNREFUSED); 3359 3360 exit_get_chap: 3361 scsi_host_put(shost); 3362 return err; 3363 } 3364 3365 static int iscsi_set_chap(struct iscsi_transport *transport, 3366 struct iscsi_uevent *ev, uint32_t len) 3367 { 3368 char *data = (char *)ev + sizeof(*ev); 3369 struct Scsi_Host *shost; 3370 int err = 0; 3371 3372 if (!transport->set_chap) 3373 return -ENOSYS; 3374 3375 shost = scsi_host_lookup(ev->u.set_path.host_no); 3376 if (!shost) { 3377 pr_err("%s could not find host no %u\n", 3378 __func__, ev->u.set_path.host_no); 3379 return -ENODEV; 3380 } 3381 3382 err = transport->set_chap(shost, data, len); 3383 scsi_host_put(shost); 3384 return err; 3385 } 3386 3387 static int iscsi_delete_chap(struct iscsi_transport *transport, 3388 struct iscsi_uevent *ev) 3389 { 3390 struct Scsi_Host *shost; 3391 int err = 0; 3392 3393 if (!transport->delete_chap) 3394 return -ENOSYS; 3395 3396 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3397 if (!shost) { 3398 printk(KERN_ERR "%s could not find host no %u\n", 3399 __func__, ev->u.delete_chap.host_no); 3400 return -ENODEV; 3401 } 3402 3403 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3404 scsi_host_put(shost); 3405 return err; 3406 } 3407 3408 static const struct { 3409 enum iscsi_discovery_parent_type value; 3410 char *name; 3411 } iscsi_discovery_parent_names[] = { 3412 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3413 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3414 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3415 }; 3416 3417 char *iscsi_get_discovery_parent_name(int parent_type) 3418 { 3419 int i; 3420 char *state = "Unknown!"; 3421 3422 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3423 if (iscsi_discovery_parent_names[i].value & parent_type) { 3424 state = iscsi_discovery_parent_names[i].name; 3425 break; 3426 } 3427 } 3428 return state; 3429 } 3430 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3431 3432 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3433 struct iscsi_uevent *ev, uint32_t len) 3434 { 3435 char *data = (char *)ev + sizeof(*ev); 3436 struct Scsi_Host *shost; 3437 struct iscsi_bus_flash_session *fnode_sess; 3438 struct iscsi_bus_flash_conn *fnode_conn; 3439 struct device *dev; 3440 uint32_t idx; 3441 int err = 0; 3442 3443 if (!transport->set_flashnode_param) { 3444 err = -ENOSYS; 3445 goto exit_set_fnode; 3446 } 3447 3448 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3449 if (!shost) { 3450 pr_err("%s could not find host no %u\n", 3451 __func__, ev->u.set_flashnode.host_no); 3452 err = -ENODEV; 3453 goto exit_set_fnode; 3454 } 3455 3456 idx = ev->u.set_flashnode.flashnode_idx; 3457 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3458 if (!fnode_sess) { 3459 pr_err("%s could not find flashnode %u for host no %u\n", 3460 __func__, idx, ev->u.set_flashnode.host_no); 3461 err = -ENODEV; 3462 goto put_host; 3463 } 3464 3465 dev = iscsi_find_flashnode_conn(fnode_sess); 3466 if (!dev) { 3467 err = -ENODEV; 3468 goto put_sess; 3469 } 3470 3471 fnode_conn = iscsi_dev_to_flash_conn(dev); 3472 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3473 put_device(dev); 3474 3475 put_sess: 3476 put_device(&fnode_sess->dev); 3477 3478 put_host: 3479 scsi_host_put(shost); 3480 3481 exit_set_fnode: 3482 return err; 3483 } 3484 3485 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3486 struct iscsi_uevent *ev, uint32_t len) 3487 { 3488 char *data = (char *)ev + sizeof(*ev); 3489 struct Scsi_Host *shost; 3490 int index; 3491 int err = 0; 3492 3493 if (!transport->new_flashnode) { 3494 err = -ENOSYS; 3495 goto exit_new_fnode; 3496 } 3497 3498 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3499 if (!shost) { 3500 pr_err("%s could not find host no %u\n", 3501 __func__, ev->u.new_flashnode.host_no); 3502 err = -ENODEV; 3503 goto put_host; 3504 } 3505 3506 index = transport->new_flashnode(shost, data, len); 3507 3508 if (index >= 0) 3509 ev->r.new_flashnode_ret.flashnode_idx = index; 3510 else 3511 err = -EIO; 3512 3513 put_host: 3514 scsi_host_put(shost); 3515 3516 exit_new_fnode: 3517 return err; 3518 } 3519 3520 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3521 struct iscsi_uevent *ev) 3522 { 3523 struct Scsi_Host *shost; 3524 struct iscsi_bus_flash_session *fnode_sess; 3525 uint32_t idx; 3526 int err = 0; 3527 3528 if (!transport->del_flashnode) { 3529 err = -ENOSYS; 3530 goto exit_del_fnode; 3531 } 3532 3533 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3534 if (!shost) { 3535 pr_err("%s could not find host no %u\n", 3536 __func__, ev->u.del_flashnode.host_no); 3537 err = -ENODEV; 3538 goto put_host; 3539 } 3540 3541 idx = ev->u.del_flashnode.flashnode_idx; 3542 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3543 if (!fnode_sess) { 3544 pr_err("%s could not find flashnode %u for host no %u\n", 3545 __func__, idx, ev->u.del_flashnode.host_no); 3546 err = -ENODEV; 3547 goto put_host; 3548 } 3549 3550 err = transport->del_flashnode(fnode_sess); 3551 put_device(&fnode_sess->dev); 3552 3553 put_host: 3554 scsi_host_put(shost); 3555 3556 exit_del_fnode: 3557 return err; 3558 } 3559 3560 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3561 struct iscsi_uevent *ev) 3562 { 3563 struct Scsi_Host *shost; 3564 struct iscsi_bus_flash_session *fnode_sess; 3565 struct iscsi_bus_flash_conn *fnode_conn; 3566 struct device *dev; 3567 uint32_t idx; 3568 int err = 0; 3569 3570 if (!transport->login_flashnode) { 3571 err = -ENOSYS; 3572 goto exit_login_fnode; 3573 } 3574 3575 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3576 if (!shost) { 3577 pr_err("%s could not find host no %u\n", 3578 __func__, ev->u.login_flashnode.host_no); 3579 err = -ENODEV; 3580 goto put_host; 3581 } 3582 3583 idx = ev->u.login_flashnode.flashnode_idx; 3584 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3585 if (!fnode_sess) { 3586 pr_err("%s could not find flashnode %u for host no %u\n", 3587 __func__, idx, ev->u.login_flashnode.host_no); 3588 err = -ENODEV; 3589 goto put_host; 3590 } 3591 3592 dev = iscsi_find_flashnode_conn(fnode_sess); 3593 if (!dev) { 3594 err = -ENODEV; 3595 goto put_sess; 3596 } 3597 3598 fnode_conn = iscsi_dev_to_flash_conn(dev); 3599 err = transport->login_flashnode(fnode_sess, fnode_conn); 3600 put_device(dev); 3601 3602 put_sess: 3603 put_device(&fnode_sess->dev); 3604 3605 put_host: 3606 scsi_host_put(shost); 3607 3608 exit_login_fnode: 3609 return err; 3610 } 3611 3612 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3613 struct iscsi_uevent *ev) 3614 { 3615 struct Scsi_Host *shost; 3616 struct iscsi_bus_flash_session *fnode_sess; 3617 struct iscsi_bus_flash_conn *fnode_conn; 3618 struct device *dev; 3619 uint32_t idx; 3620 int err = 0; 3621 3622 if (!transport->logout_flashnode) { 3623 err = -ENOSYS; 3624 goto exit_logout_fnode; 3625 } 3626 3627 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3628 if (!shost) { 3629 pr_err("%s could not find host no %u\n", 3630 __func__, ev->u.logout_flashnode.host_no); 3631 err = -ENODEV; 3632 goto put_host; 3633 } 3634 3635 idx = ev->u.logout_flashnode.flashnode_idx; 3636 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3637 if (!fnode_sess) { 3638 pr_err("%s could not find flashnode %u for host no %u\n", 3639 __func__, idx, ev->u.logout_flashnode.host_no); 3640 err = -ENODEV; 3641 goto put_host; 3642 } 3643 3644 dev = iscsi_find_flashnode_conn(fnode_sess); 3645 if (!dev) { 3646 err = -ENODEV; 3647 goto put_sess; 3648 } 3649 3650 fnode_conn = iscsi_dev_to_flash_conn(dev); 3651 3652 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3653 put_device(dev); 3654 3655 put_sess: 3656 put_device(&fnode_sess->dev); 3657 3658 put_host: 3659 scsi_host_put(shost); 3660 3661 exit_logout_fnode: 3662 return err; 3663 } 3664 3665 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3666 struct iscsi_uevent *ev) 3667 { 3668 struct Scsi_Host *shost; 3669 struct iscsi_cls_session *session; 3670 int err = 0; 3671 3672 if (!transport->logout_flashnode_sid) { 3673 err = -ENOSYS; 3674 goto exit_logout_sid; 3675 } 3676 3677 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3678 if (!shost) { 3679 pr_err("%s could not find host no %u\n", 3680 __func__, ev->u.logout_flashnode.host_no); 3681 err = -ENODEV; 3682 goto put_host; 3683 } 3684 3685 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3686 if (!session) { 3687 pr_err("%s could not find session id %u\n", 3688 __func__, ev->u.logout_flashnode_sid.sid); 3689 err = -EINVAL; 3690 goto put_host; 3691 } 3692 3693 err = transport->logout_flashnode_sid(session); 3694 3695 put_host: 3696 scsi_host_put(shost); 3697 3698 exit_logout_sid: 3699 return err; 3700 } 3701 3702 static int 3703 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3704 { 3705 struct iscsi_uevent *ev = nlmsg_data(nlh); 3706 struct Scsi_Host *shost = NULL; 3707 struct iscsi_internal *priv; 3708 struct sk_buff *skbhost_stats; 3709 struct nlmsghdr *nlhhost_stats; 3710 struct iscsi_uevent *evhost_stats; 3711 int host_stats_size = 0; 3712 int len, err = 0; 3713 char *buf; 3714 3715 if (!transport->get_host_stats) 3716 return -ENOSYS; 3717 3718 priv = iscsi_if_transport_lookup(transport); 3719 if (!priv) 3720 return -EINVAL; 3721 3722 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3723 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3724 3725 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3726 if (!shost) { 3727 pr_err("%s: failed. Could not find host no %u\n", 3728 __func__, ev->u.get_host_stats.host_no); 3729 return -ENODEV; 3730 } 3731 3732 do { 3733 int actual_size; 3734 3735 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3736 if (!skbhost_stats) { 3737 pr_err("cannot deliver host stats: OOM\n"); 3738 err = -ENOMEM; 3739 goto exit_host_stats; 3740 } 3741 3742 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3743 (len - sizeof(*nlhhost_stats)), 0); 3744 evhost_stats = nlmsg_data(nlhhost_stats); 3745 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3746 evhost_stats->transport_handle = iscsi_handle(transport); 3747 evhost_stats->type = nlh->nlmsg_type; 3748 evhost_stats->u.get_host_stats.host_no = 3749 ev->u.get_host_stats.host_no; 3750 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3751 memset(buf, 0, host_stats_size); 3752 3753 err = transport->get_host_stats(shost, buf, host_stats_size); 3754 if (err) { 3755 kfree_skb(skbhost_stats); 3756 goto exit_host_stats; 3757 } 3758 3759 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3760 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3761 nlhhost_stats->nlmsg_len = actual_size; 3762 3763 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3764 GFP_KERNEL); 3765 } while (err < 0 && err != -ECONNREFUSED); 3766 3767 exit_host_stats: 3768 scsi_host_put(shost); 3769 return err; 3770 } 3771 3772 static int iscsi_if_transport_conn(struct iscsi_transport *transport, 3773 struct nlmsghdr *nlh) 3774 { 3775 struct iscsi_uevent *ev = nlmsg_data(nlh); 3776 struct iscsi_cls_session *session; 3777 struct iscsi_cls_conn *conn = NULL; 3778 struct iscsi_endpoint *ep; 3779 uint32_t pdu_len; 3780 int err = 0; 3781 3782 switch (nlh->nlmsg_type) { 3783 case ISCSI_UEVENT_CREATE_CONN: 3784 return iscsi_if_create_conn(transport, ev); 3785 case ISCSI_UEVENT_DESTROY_CONN: 3786 return iscsi_if_destroy_conn(transport, ev); 3787 case ISCSI_UEVENT_STOP_CONN: 3788 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, 3789 ev->u.stop_conn.cid); 3790 if (!conn) 3791 return -EINVAL; 3792 3793 return iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3794 } 3795 3796 /* 3797 * The following cmds need to be run under the ep_mutex so in kernel 3798 * conn cleanup (ep_disconnect + unbind and conn) is not done while 3799 * these are running. They also must not run if we have just run a conn 3800 * cleanup because they would set the state in a way that might allow 3801 * IO or send IO themselves. 3802 */ 3803 switch (nlh->nlmsg_type) { 3804 case ISCSI_UEVENT_START_CONN: 3805 conn = iscsi_conn_lookup(ev->u.start_conn.sid, 3806 ev->u.start_conn.cid); 3807 break; 3808 case ISCSI_UEVENT_BIND_CONN: 3809 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3810 break; 3811 case ISCSI_UEVENT_SEND_PDU: 3812 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3813 break; 3814 } 3815 3816 if (!conn) 3817 return -EINVAL; 3818 3819 mutex_lock(&conn->ep_mutex); 3820 spin_lock_irq(&conn->lock); 3821 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 3822 spin_unlock_irq(&conn->lock); 3823 mutex_unlock(&conn->ep_mutex); 3824 ev->r.retcode = -ENOTCONN; 3825 return 0; 3826 } 3827 spin_unlock_irq(&conn->lock); 3828 3829 switch (nlh->nlmsg_type) { 3830 case ISCSI_UEVENT_BIND_CONN: 3831 session = iscsi_session_lookup(ev->u.b_conn.sid); 3832 if (!session) { 3833 err = -EINVAL; 3834 break; 3835 } 3836 3837 ev->r.retcode = transport->bind_conn(session, conn, 3838 ev->u.b_conn.transport_eph, 3839 ev->u.b_conn.is_leading); 3840 if (!ev->r.retcode) 3841 WRITE_ONCE(conn->state, ISCSI_CONN_BOUND); 3842 3843 if (ev->r.retcode || !transport->ep_connect) 3844 break; 3845 3846 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3847 if (ep) { 3848 ep->conn = conn; 3849 conn->ep = ep; 3850 iscsi_put_endpoint(ep); 3851 } else { 3852 err = -ENOTCONN; 3853 iscsi_cls_conn_printk(KERN_ERR, conn, 3854 "Could not set ep conn binding\n"); 3855 } 3856 break; 3857 case ISCSI_UEVENT_START_CONN: 3858 ev->r.retcode = transport->start_conn(conn); 3859 if (!ev->r.retcode) 3860 WRITE_ONCE(conn->state, ISCSI_CONN_UP); 3861 3862 break; 3863 case ISCSI_UEVENT_SEND_PDU: 3864 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev); 3865 3866 if ((ev->u.send_pdu.hdr_size > pdu_len) || 3867 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) { 3868 err = -EINVAL; 3869 break; 3870 } 3871 3872 ev->r.retcode = transport->send_pdu(conn, 3873 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)), 3874 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3875 ev->u.send_pdu.data_size); 3876 break; 3877 default: 3878 err = -ENOSYS; 3879 } 3880 3881 mutex_unlock(&conn->ep_mutex); 3882 return err; 3883 } 3884 3885 static int 3886 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3887 { 3888 int err = 0; 3889 u32 portid; 3890 struct iscsi_uevent *ev = nlmsg_data(nlh); 3891 struct iscsi_transport *transport = NULL; 3892 struct iscsi_internal *priv; 3893 struct iscsi_cls_session *session; 3894 struct iscsi_endpoint *ep = NULL; 3895 3896 if (!netlink_capable(skb, CAP_SYS_ADMIN)) 3897 return -EPERM; 3898 3899 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3900 *group = ISCSI_NL_GRP_UIP; 3901 else 3902 *group = ISCSI_NL_GRP_ISCSID; 3903 3904 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3905 if (!priv) 3906 return -EINVAL; 3907 transport = priv->iscsi_transport; 3908 3909 if (!try_module_get(transport->owner)) 3910 return -EINVAL; 3911 3912 portid = NETLINK_CB(skb).portid; 3913 3914 switch (nlh->nlmsg_type) { 3915 case ISCSI_UEVENT_CREATE_SESSION: 3916 err = iscsi_if_create_session(priv, ep, ev, 3917 portid, 3918 ev->u.c_session.initial_cmdsn, 3919 ev->u.c_session.cmds_max, 3920 ev->u.c_session.queue_depth); 3921 break; 3922 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3923 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3924 if (!ep) { 3925 err = -EINVAL; 3926 break; 3927 } 3928 3929 err = iscsi_if_create_session(priv, ep, ev, 3930 portid, 3931 ev->u.c_bound_session.initial_cmdsn, 3932 ev->u.c_bound_session.cmds_max, 3933 ev->u.c_bound_session.queue_depth); 3934 iscsi_put_endpoint(ep); 3935 break; 3936 case ISCSI_UEVENT_DESTROY_SESSION: 3937 session = iscsi_session_lookup(ev->u.d_session.sid); 3938 if (!session) 3939 err = -EINVAL; 3940 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3941 err = -EBUSY; 3942 else 3943 transport->destroy_session(session); 3944 break; 3945 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3946 session = iscsi_session_lookup(ev->u.d_session.sid); 3947 if (!session) 3948 err = -EINVAL; 3949 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3950 err = -EBUSY; 3951 else { 3952 unsigned long flags; 3953 3954 /* Prevent this session from being found again */ 3955 spin_lock_irqsave(&sesslock, flags); 3956 list_del_init(&session->sess_list); 3957 spin_unlock_irqrestore(&sesslock, flags); 3958 3959 queue_work(system_unbound_wq, &session->destroy_work); 3960 } 3961 break; 3962 case ISCSI_UEVENT_UNBIND_SESSION: 3963 session = iscsi_session_lookup(ev->u.d_session.sid); 3964 if (session) 3965 queue_work(session->workq, &session->unbind_work); 3966 else 3967 err = -EINVAL; 3968 break; 3969 case ISCSI_UEVENT_SET_PARAM: 3970 err = iscsi_if_set_param(transport, ev); 3971 break; 3972 case ISCSI_UEVENT_CREATE_CONN: 3973 case ISCSI_UEVENT_DESTROY_CONN: 3974 case ISCSI_UEVENT_STOP_CONN: 3975 case ISCSI_UEVENT_START_CONN: 3976 case ISCSI_UEVENT_BIND_CONN: 3977 case ISCSI_UEVENT_SEND_PDU: 3978 err = iscsi_if_transport_conn(transport, nlh); 3979 break; 3980 case ISCSI_UEVENT_GET_STATS: 3981 err = iscsi_if_get_stats(transport, nlh); 3982 break; 3983 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3984 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3985 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3986 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3987 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3988 break; 3989 case ISCSI_UEVENT_TGT_DSCVR: 3990 err = iscsi_tgt_dscvr(transport, ev); 3991 break; 3992 case ISCSI_UEVENT_SET_HOST_PARAM: 3993 err = iscsi_set_host_param(transport, ev); 3994 break; 3995 case ISCSI_UEVENT_PATH_UPDATE: 3996 err = iscsi_set_path(transport, ev); 3997 break; 3998 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3999 err = iscsi_set_iface_params(transport, ev, 4000 nlmsg_attrlen(nlh, sizeof(*ev))); 4001 break; 4002 case ISCSI_UEVENT_PING: 4003 err = iscsi_send_ping(transport, ev); 4004 break; 4005 case ISCSI_UEVENT_GET_CHAP: 4006 err = iscsi_get_chap(transport, nlh); 4007 break; 4008 case ISCSI_UEVENT_DELETE_CHAP: 4009 err = iscsi_delete_chap(transport, ev); 4010 break; 4011 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 4012 err = iscsi_set_flashnode_param(transport, ev, 4013 nlmsg_attrlen(nlh, 4014 sizeof(*ev))); 4015 break; 4016 case ISCSI_UEVENT_NEW_FLASHNODE: 4017 err = iscsi_new_flashnode(transport, ev, 4018 nlmsg_attrlen(nlh, sizeof(*ev))); 4019 break; 4020 case ISCSI_UEVENT_DEL_FLASHNODE: 4021 err = iscsi_del_flashnode(transport, ev); 4022 break; 4023 case ISCSI_UEVENT_LOGIN_FLASHNODE: 4024 err = iscsi_login_flashnode(transport, ev); 4025 break; 4026 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 4027 err = iscsi_logout_flashnode(transport, ev); 4028 break; 4029 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 4030 err = iscsi_logout_flashnode_sid(transport, ev); 4031 break; 4032 case ISCSI_UEVENT_SET_CHAP: 4033 err = iscsi_set_chap(transport, ev, 4034 nlmsg_attrlen(nlh, sizeof(*ev))); 4035 break; 4036 case ISCSI_UEVENT_GET_HOST_STATS: 4037 err = iscsi_get_host_stats(transport, nlh); 4038 break; 4039 default: 4040 err = -ENOSYS; 4041 break; 4042 } 4043 4044 module_put(transport->owner); 4045 return err; 4046 } 4047 4048 /* 4049 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 4050 * Malformed skbs with wrong lengths or invalid creds are not processed. 4051 */ 4052 static void 4053 iscsi_if_rx(struct sk_buff *skb) 4054 { 4055 u32 portid = NETLINK_CB(skb).portid; 4056 4057 mutex_lock(&rx_queue_mutex); 4058 while (skb->len >= NLMSG_HDRLEN) { 4059 int err; 4060 uint32_t rlen; 4061 struct nlmsghdr *nlh; 4062 struct iscsi_uevent *ev; 4063 uint32_t group; 4064 int retries = ISCSI_SEND_MAX_ALLOWED; 4065 4066 nlh = nlmsg_hdr(skb); 4067 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 4068 skb->len < nlh->nlmsg_len) { 4069 break; 4070 } 4071 4072 ev = nlmsg_data(nlh); 4073 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 4074 if (rlen > skb->len) 4075 rlen = skb->len; 4076 4077 err = iscsi_if_recv_msg(skb, nlh, &group); 4078 if (err) { 4079 ev->type = ISCSI_KEVENT_IF_ERROR; 4080 ev->iferror = err; 4081 } 4082 do { 4083 /* 4084 * special case for GET_STATS: 4085 * on success - sending reply and stats from 4086 * inside of if_recv_msg(), 4087 * on error - fall through. 4088 */ 4089 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 4090 break; 4091 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 4092 break; 4093 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 4094 ev, sizeof(*ev)); 4095 if (err == -EAGAIN && --retries < 0) { 4096 printk(KERN_WARNING "Send reply failed, error %d\n", err); 4097 break; 4098 } 4099 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 4100 skb_pull(skb, rlen); 4101 } 4102 mutex_unlock(&rx_queue_mutex); 4103 } 4104 4105 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 4106 struct device_attribute dev_attr_##_prefix##_##_name = \ 4107 __ATTR(_name,_mode,_show,_store) 4108 4109 /* 4110 * iSCSI connection attrs 4111 */ 4112 #define iscsi_conn_attr_show(param) \ 4113 static ssize_t \ 4114 show_conn_param_##param(struct device *dev, \ 4115 struct device_attribute *attr, char *buf) \ 4116 { \ 4117 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4118 struct iscsi_transport *t = conn->transport; \ 4119 return t->get_conn_param(conn, param, buf); \ 4120 } 4121 4122 #define iscsi_conn_attr(field, param) \ 4123 iscsi_conn_attr_show(param) \ 4124 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 4125 NULL); 4126 4127 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 4128 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 4129 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 4130 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 4131 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 4132 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 4133 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 4134 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 4135 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 4136 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 4137 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 4138 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 4139 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 4140 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 4141 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 4142 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 4143 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 4144 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 4145 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 4146 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 4147 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 4148 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 4149 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 4150 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 4151 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 4152 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 4153 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 4154 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 4155 4156 static const char *const connection_state_names[] = { 4157 [ISCSI_CONN_UP] = "up", 4158 [ISCSI_CONN_DOWN] = "down", 4159 [ISCSI_CONN_FAILED] = "failed", 4160 [ISCSI_CONN_BOUND] = "bound" 4161 }; 4162 4163 static ssize_t show_conn_state(struct device *dev, 4164 struct device_attribute *attr, char *buf) 4165 { 4166 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 4167 const char *state = "unknown"; 4168 int conn_state = READ_ONCE(conn->state); 4169 4170 if (conn_state >= 0 && 4171 conn_state < ARRAY_SIZE(connection_state_names)) 4172 state = connection_state_names[conn_state]; 4173 4174 return sysfs_emit(buf, "%s\n", state); 4175 } 4176 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 4177 NULL); 4178 4179 #define iscsi_conn_ep_attr_show(param) \ 4180 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 4181 struct device_attribute *attr,\ 4182 char *buf) \ 4183 { \ 4184 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4185 struct iscsi_transport *t = conn->transport; \ 4186 struct iscsi_endpoint *ep; \ 4187 ssize_t rc; \ 4188 \ 4189 /* \ 4190 * Need to make sure ep_disconnect does not free the LLD's \ 4191 * interconnect resources while we are trying to read them. \ 4192 */ \ 4193 mutex_lock(&conn->ep_mutex); \ 4194 ep = conn->ep; \ 4195 if (!ep && t->ep_connect) { \ 4196 mutex_unlock(&conn->ep_mutex); \ 4197 return -ENOTCONN; \ 4198 } \ 4199 \ 4200 if (ep) \ 4201 rc = t->get_ep_param(ep, param, buf); \ 4202 else \ 4203 rc = t->get_conn_param(conn, param, buf); \ 4204 mutex_unlock(&conn->ep_mutex); \ 4205 return rc; \ 4206 } 4207 4208 #define iscsi_conn_ep_attr(field, param) \ 4209 iscsi_conn_ep_attr_show(param) \ 4210 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4211 show_conn_ep_param_##param, NULL); 4212 4213 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4214 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4215 4216 static struct attribute *iscsi_conn_attrs[] = { 4217 &dev_attr_conn_max_recv_dlength.attr, 4218 &dev_attr_conn_max_xmit_dlength.attr, 4219 &dev_attr_conn_header_digest.attr, 4220 &dev_attr_conn_data_digest.attr, 4221 &dev_attr_conn_ifmarker.attr, 4222 &dev_attr_conn_ofmarker.attr, 4223 &dev_attr_conn_address.attr, 4224 &dev_attr_conn_port.attr, 4225 &dev_attr_conn_exp_statsn.attr, 4226 &dev_attr_conn_persistent_address.attr, 4227 &dev_attr_conn_persistent_port.attr, 4228 &dev_attr_conn_ping_tmo.attr, 4229 &dev_attr_conn_recv_tmo.attr, 4230 &dev_attr_conn_local_port.attr, 4231 &dev_attr_conn_statsn.attr, 4232 &dev_attr_conn_keepalive_tmo.attr, 4233 &dev_attr_conn_max_segment_size.attr, 4234 &dev_attr_conn_tcp_timestamp_stat.attr, 4235 &dev_attr_conn_tcp_wsf_disable.attr, 4236 &dev_attr_conn_tcp_nagle_disable.attr, 4237 &dev_attr_conn_tcp_timer_scale.attr, 4238 &dev_attr_conn_tcp_timestamp_enable.attr, 4239 &dev_attr_conn_fragment_disable.attr, 4240 &dev_attr_conn_ipv4_tos.attr, 4241 &dev_attr_conn_ipv6_traffic_class.attr, 4242 &dev_attr_conn_ipv6_flow_label.attr, 4243 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4244 &dev_attr_conn_tcp_xmit_wsf.attr, 4245 &dev_attr_conn_tcp_recv_wsf.attr, 4246 &dev_attr_conn_local_ipaddr.attr, 4247 &dev_attr_conn_state.attr, 4248 NULL, 4249 }; 4250 4251 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4252 struct attribute *attr, int i) 4253 { 4254 struct device *cdev = container_of(kobj, struct device, kobj); 4255 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4256 struct iscsi_transport *t = conn->transport; 4257 int param; 4258 4259 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4260 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4261 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4262 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4263 else if (attr == &dev_attr_conn_header_digest.attr) 4264 param = ISCSI_PARAM_HDRDGST_EN; 4265 else if (attr == &dev_attr_conn_data_digest.attr) 4266 param = ISCSI_PARAM_DATADGST_EN; 4267 else if (attr == &dev_attr_conn_ifmarker.attr) 4268 param = ISCSI_PARAM_IFMARKER_EN; 4269 else if (attr == &dev_attr_conn_ofmarker.attr) 4270 param = ISCSI_PARAM_OFMARKER_EN; 4271 else if (attr == &dev_attr_conn_address.attr) 4272 param = ISCSI_PARAM_CONN_ADDRESS; 4273 else if (attr == &dev_attr_conn_port.attr) 4274 param = ISCSI_PARAM_CONN_PORT; 4275 else if (attr == &dev_attr_conn_exp_statsn.attr) 4276 param = ISCSI_PARAM_EXP_STATSN; 4277 else if (attr == &dev_attr_conn_persistent_address.attr) 4278 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4279 else if (attr == &dev_attr_conn_persistent_port.attr) 4280 param = ISCSI_PARAM_PERSISTENT_PORT; 4281 else if (attr == &dev_attr_conn_ping_tmo.attr) 4282 param = ISCSI_PARAM_PING_TMO; 4283 else if (attr == &dev_attr_conn_recv_tmo.attr) 4284 param = ISCSI_PARAM_RECV_TMO; 4285 else if (attr == &dev_attr_conn_local_port.attr) 4286 param = ISCSI_PARAM_LOCAL_PORT; 4287 else if (attr == &dev_attr_conn_statsn.attr) 4288 param = ISCSI_PARAM_STATSN; 4289 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4290 param = ISCSI_PARAM_KEEPALIVE_TMO; 4291 else if (attr == &dev_attr_conn_max_segment_size.attr) 4292 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4293 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4294 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4295 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4296 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4297 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4298 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4299 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4300 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4301 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4302 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4303 else if (attr == &dev_attr_conn_fragment_disable.attr) 4304 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4305 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4306 param = ISCSI_PARAM_IPV4_TOS; 4307 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4308 param = ISCSI_PARAM_IPV6_TC; 4309 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4310 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4311 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4312 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4313 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4314 param = ISCSI_PARAM_TCP_XMIT_WSF; 4315 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4316 param = ISCSI_PARAM_TCP_RECV_WSF; 4317 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4318 param = ISCSI_PARAM_LOCAL_IPADDR; 4319 else if (attr == &dev_attr_conn_state.attr) 4320 return S_IRUGO; 4321 else { 4322 WARN_ONCE(1, "Invalid conn attr"); 4323 return 0; 4324 } 4325 4326 return t->attr_is_visible(ISCSI_PARAM, param); 4327 } 4328 4329 static struct attribute_group iscsi_conn_group = { 4330 .attrs = iscsi_conn_attrs, 4331 .is_visible = iscsi_conn_attr_is_visible, 4332 }; 4333 4334 /* 4335 * iSCSI session attrs 4336 */ 4337 #define iscsi_session_attr_show(param, perm) \ 4338 static ssize_t \ 4339 show_session_param_##param(struct device *dev, \ 4340 struct device_attribute *attr, char *buf) \ 4341 { \ 4342 struct iscsi_cls_session *session = \ 4343 iscsi_dev_to_session(dev->parent); \ 4344 struct iscsi_transport *t = session->transport; \ 4345 \ 4346 if (perm && !capable(CAP_SYS_ADMIN)) \ 4347 return -EACCES; \ 4348 return t->get_session_param(session, param, buf); \ 4349 } 4350 4351 #define iscsi_session_attr(field, param, perm) \ 4352 iscsi_session_attr_show(param, perm) \ 4353 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4354 NULL); 4355 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4356 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4357 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4358 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4359 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4360 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4361 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4362 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4363 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4364 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4365 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4366 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4367 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4368 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4369 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4370 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4371 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4372 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4373 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4374 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4375 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4376 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4377 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4378 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4379 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4380 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4381 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4382 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4383 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4384 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4385 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4386 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4387 iscsi_session_attr(discovery_auth_optional, 4388 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4389 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4390 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4391 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4392 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4393 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4394 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4395 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4396 4397 static ssize_t 4398 show_priv_session_target_state(struct device *dev, struct device_attribute *attr, 4399 char *buf) 4400 { 4401 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4402 4403 return sysfs_emit(buf, "%s\n", 4404 iscsi_session_target_state_name[session->target_state]); 4405 } 4406 4407 static ISCSI_CLASS_ATTR(priv_sess, target_state, S_IRUGO, 4408 show_priv_session_target_state, NULL); 4409 4410 static ssize_t 4411 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4412 char *buf) 4413 { 4414 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4415 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state)); 4416 } 4417 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4418 NULL); 4419 static ssize_t 4420 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4421 char *buf) 4422 { 4423 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4424 return sysfs_emit(buf, "%d\n", session->creator); 4425 } 4426 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4427 NULL); 4428 static ssize_t 4429 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4430 char *buf) 4431 { 4432 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4433 return sysfs_emit(buf, "%d\n", session->target_id); 4434 } 4435 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4436 show_priv_session_target_id, NULL); 4437 4438 #define iscsi_priv_session_attr_show(field, format) \ 4439 static ssize_t \ 4440 show_priv_session_##field(struct device *dev, \ 4441 struct device_attribute *attr, char *buf) \ 4442 { \ 4443 struct iscsi_cls_session *session = \ 4444 iscsi_dev_to_session(dev->parent); \ 4445 if (session->field == -1) \ 4446 return sysfs_emit(buf, "off\n"); \ 4447 return sysfs_emit(buf, format"\n", session->field); \ 4448 } 4449 4450 #define iscsi_priv_session_attr_store(field) \ 4451 static ssize_t \ 4452 store_priv_session_##field(struct device *dev, \ 4453 struct device_attribute *attr, \ 4454 const char *buf, size_t count) \ 4455 { \ 4456 int val; \ 4457 char *cp; \ 4458 struct iscsi_cls_session *session = \ 4459 iscsi_dev_to_session(dev->parent); \ 4460 if ((session->state == ISCSI_SESSION_FREE) || \ 4461 (session->state == ISCSI_SESSION_FAILED)) \ 4462 return -EBUSY; \ 4463 if (strncmp(buf, "off", 3) == 0) { \ 4464 session->field = -1; \ 4465 session->field##_sysfs_override = true; \ 4466 } else { \ 4467 val = simple_strtoul(buf, &cp, 0); \ 4468 if (*cp != '\0' && *cp != '\n') \ 4469 return -EINVAL; \ 4470 session->field = val; \ 4471 session->field##_sysfs_override = true; \ 4472 } \ 4473 return count; \ 4474 } 4475 4476 #define iscsi_priv_session_rw_attr(field, format) \ 4477 iscsi_priv_session_attr_show(field, format) \ 4478 iscsi_priv_session_attr_store(field) \ 4479 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4480 show_priv_session_##field, \ 4481 store_priv_session_##field) 4482 4483 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4484 4485 static struct attribute *iscsi_session_attrs[] = { 4486 &dev_attr_sess_initial_r2t.attr, 4487 &dev_attr_sess_max_outstanding_r2t.attr, 4488 &dev_attr_sess_immediate_data.attr, 4489 &dev_attr_sess_first_burst_len.attr, 4490 &dev_attr_sess_max_burst_len.attr, 4491 &dev_attr_sess_data_pdu_in_order.attr, 4492 &dev_attr_sess_data_seq_in_order.attr, 4493 &dev_attr_sess_erl.attr, 4494 &dev_attr_sess_targetname.attr, 4495 &dev_attr_sess_tpgt.attr, 4496 &dev_attr_sess_password.attr, 4497 &dev_attr_sess_password_in.attr, 4498 &dev_attr_sess_username.attr, 4499 &dev_attr_sess_username_in.attr, 4500 &dev_attr_sess_fast_abort.attr, 4501 &dev_attr_sess_abort_tmo.attr, 4502 &dev_attr_sess_lu_reset_tmo.attr, 4503 &dev_attr_sess_tgt_reset_tmo.attr, 4504 &dev_attr_sess_ifacename.attr, 4505 &dev_attr_sess_initiatorname.attr, 4506 &dev_attr_sess_targetalias.attr, 4507 &dev_attr_sess_boot_root.attr, 4508 &dev_attr_sess_boot_nic.attr, 4509 &dev_attr_sess_boot_target.attr, 4510 &dev_attr_priv_sess_recovery_tmo.attr, 4511 &dev_attr_priv_sess_state.attr, 4512 &dev_attr_priv_sess_target_state.attr, 4513 &dev_attr_priv_sess_creator.attr, 4514 &dev_attr_sess_chap_out_idx.attr, 4515 &dev_attr_sess_chap_in_idx.attr, 4516 &dev_attr_priv_sess_target_id.attr, 4517 &dev_attr_sess_auto_snd_tgt_disable.attr, 4518 &dev_attr_sess_discovery_session.attr, 4519 &dev_attr_sess_portal_type.attr, 4520 &dev_attr_sess_chap_auth.attr, 4521 &dev_attr_sess_discovery_logout.attr, 4522 &dev_attr_sess_bidi_chap.attr, 4523 &dev_attr_sess_discovery_auth_optional.attr, 4524 &dev_attr_sess_def_time2wait.attr, 4525 &dev_attr_sess_def_time2retain.attr, 4526 &dev_attr_sess_isid.attr, 4527 &dev_attr_sess_tsid.attr, 4528 &dev_attr_sess_def_taskmgmt_tmo.attr, 4529 &dev_attr_sess_discovery_parent_idx.attr, 4530 &dev_attr_sess_discovery_parent_type.attr, 4531 NULL, 4532 }; 4533 4534 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4535 struct attribute *attr, int i) 4536 { 4537 struct device *cdev = container_of(kobj, struct device, kobj); 4538 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4539 struct iscsi_transport *t = session->transport; 4540 int param; 4541 4542 if (attr == &dev_attr_sess_initial_r2t.attr) 4543 param = ISCSI_PARAM_INITIAL_R2T_EN; 4544 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4545 param = ISCSI_PARAM_MAX_R2T; 4546 else if (attr == &dev_attr_sess_immediate_data.attr) 4547 param = ISCSI_PARAM_IMM_DATA_EN; 4548 else if (attr == &dev_attr_sess_first_burst_len.attr) 4549 param = ISCSI_PARAM_FIRST_BURST; 4550 else if (attr == &dev_attr_sess_max_burst_len.attr) 4551 param = ISCSI_PARAM_MAX_BURST; 4552 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4553 param = ISCSI_PARAM_PDU_INORDER_EN; 4554 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4555 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4556 else if (attr == &dev_attr_sess_erl.attr) 4557 param = ISCSI_PARAM_ERL; 4558 else if (attr == &dev_attr_sess_targetname.attr) 4559 param = ISCSI_PARAM_TARGET_NAME; 4560 else if (attr == &dev_attr_sess_tpgt.attr) 4561 param = ISCSI_PARAM_TPGT; 4562 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4563 param = ISCSI_PARAM_CHAP_IN_IDX; 4564 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4565 param = ISCSI_PARAM_CHAP_OUT_IDX; 4566 else if (attr == &dev_attr_sess_password.attr) 4567 param = ISCSI_PARAM_USERNAME; 4568 else if (attr == &dev_attr_sess_password_in.attr) 4569 param = ISCSI_PARAM_USERNAME_IN; 4570 else if (attr == &dev_attr_sess_username.attr) 4571 param = ISCSI_PARAM_PASSWORD; 4572 else if (attr == &dev_attr_sess_username_in.attr) 4573 param = ISCSI_PARAM_PASSWORD_IN; 4574 else if (attr == &dev_attr_sess_fast_abort.attr) 4575 param = ISCSI_PARAM_FAST_ABORT; 4576 else if (attr == &dev_attr_sess_abort_tmo.attr) 4577 param = ISCSI_PARAM_ABORT_TMO; 4578 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4579 param = ISCSI_PARAM_LU_RESET_TMO; 4580 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4581 param = ISCSI_PARAM_TGT_RESET_TMO; 4582 else if (attr == &dev_attr_sess_ifacename.attr) 4583 param = ISCSI_PARAM_IFACE_NAME; 4584 else if (attr == &dev_attr_sess_initiatorname.attr) 4585 param = ISCSI_PARAM_INITIATOR_NAME; 4586 else if (attr == &dev_attr_sess_targetalias.attr) 4587 param = ISCSI_PARAM_TARGET_ALIAS; 4588 else if (attr == &dev_attr_sess_boot_root.attr) 4589 param = ISCSI_PARAM_BOOT_ROOT; 4590 else if (attr == &dev_attr_sess_boot_nic.attr) 4591 param = ISCSI_PARAM_BOOT_NIC; 4592 else if (attr == &dev_attr_sess_boot_target.attr) 4593 param = ISCSI_PARAM_BOOT_TARGET; 4594 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4595 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4596 else if (attr == &dev_attr_sess_discovery_session.attr) 4597 param = ISCSI_PARAM_DISCOVERY_SESS; 4598 else if (attr == &dev_attr_sess_portal_type.attr) 4599 param = ISCSI_PARAM_PORTAL_TYPE; 4600 else if (attr == &dev_attr_sess_chap_auth.attr) 4601 param = ISCSI_PARAM_CHAP_AUTH_EN; 4602 else if (attr == &dev_attr_sess_discovery_logout.attr) 4603 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4604 else if (attr == &dev_attr_sess_bidi_chap.attr) 4605 param = ISCSI_PARAM_BIDI_CHAP_EN; 4606 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4607 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4608 else if (attr == &dev_attr_sess_def_time2wait.attr) 4609 param = ISCSI_PARAM_DEF_TIME2WAIT; 4610 else if (attr == &dev_attr_sess_def_time2retain.attr) 4611 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4612 else if (attr == &dev_attr_sess_isid.attr) 4613 param = ISCSI_PARAM_ISID; 4614 else if (attr == &dev_attr_sess_tsid.attr) 4615 param = ISCSI_PARAM_TSID; 4616 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4617 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4618 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4619 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4620 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4621 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4622 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4623 return S_IRUGO | S_IWUSR; 4624 else if (attr == &dev_attr_priv_sess_state.attr) 4625 return S_IRUGO; 4626 else if (attr == &dev_attr_priv_sess_target_state.attr) 4627 return S_IRUGO; 4628 else if (attr == &dev_attr_priv_sess_creator.attr) 4629 return S_IRUGO; 4630 else if (attr == &dev_attr_priv_sess_target_id.attr) 4631 return S_IRUGO; 4632 else { 4633 WARN_ONCE(1, "Invalid session attr"); 4634 return 0; 4635 } 4636 4637 return t->attr_is_visible(ISCSI_PARAM, param); 4638 } 4639 4640 static struct attribute_group iscsi_session_group = { 4641 .attrs = iscsi_session_attrs, 4642 .is_visible = iscsi_session_attr_is_visible, 4643 }; 4644 4645 /* 4646 * iSCSI host attrs 4647 */ 4648 #define iscsi_host_attr_show(param) \ 4649 static ssize_t \ 4650 show_host_param_##param(struct device *dev, \ 4651 struct device_attribute *attr, char *buf) \ 4652 { \ 4653 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4654 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4655 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4656 } 4657 4658 #define iscsi_host_attr(field, param) \ 4659 iscsi_host_attr_show(param) \ 4660 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4661 NULL); 4662 4663 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4664 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4665 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4666 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4667 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4668 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4669 4670 static struct attribute *iscsi_host_attrs[] = { 4671 &dev_attr_host_netdev.attr, 4672 &dev_attr_host_hwaddress.attr, 4673 &dev_attr_host_ipaddress.attr, 4674 &dev_attr_host_initiatorname.attr, 4675 &dev_attr_host_port_state.attr, 4676 &dev_attr_host_port_speed.attr, 4677 NULL, 4678 }; 4679 4680 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4681 struct attribute *attr, int i) 4682 { 4683 struct device *cdev = container_of(kobj, struct device, kobj); 4684 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4685 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4686 int param; 4687 4688 if (attr == &dev_attr_host_netdev.attr) 4689 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4690 else if (attr == &dev_attr_host_hwaddress.attr) 4691 param = ISCSI_HOST_PARAM_HWADDRESS; 4692 else if (attr == &dev_attr_host_ipaddress.attr) 4693 param = ISCSI_HOST_PARAM_IPADDRESS; 4694 else if (attr == &dev_attr_host_initiatorname.attr) 4695 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4696 else if (attr == &dev_attr_host_port_state.attr) 4697 param = ISCSI_HOST_PARAM_PORT_STATE; 4698 else if (attr == &dev_attr_host_port_speed.attr) 4699 param = ISCSI_HOST_PARAM_PORT_SPEED; 4700 else { 4701 WARN_ONCE(1, "Invalid host attr"); 4702 return 0; 4703 } 4704 4705 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4706 } 4707 4708 static struct attribute_group iscsi_host_group = { 4709 .attrs = iscsi_host_attrs, 4710 .is_visible = iscsi_host_attr_is_visible, 4711 }; 4712 4713 /* convert iscsi_port_speed values to ascii string name */ 4714 static const struct { 4715 enum iscsi_port_speed value; 4716 char *name; 4717 } iscsi_port_speed_names[] = { 4718 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4719 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4720 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4721 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4722 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4723 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4724 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4725 }; 4726 4727 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4728 { 4729 int i; 4730 char *speed = "Unknown!"; 4731 struct iscsi_cls_host *ihost = shost->shost_data; 4732 uint32_t port_speed = ihost->port_speed; 4733 4734 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4735 if (iscsi_port_speed_names[i].value & port_speed) { 4736 speed = iscsi_port_speed_names[i].name; 4737 break; 4738 } 4739 } 4740 return speed; 4741 } 4742 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4743 4744 /* convert iscsi_port_state values to ascii string name */ 4745 static const struct { 4746 enum iscsi_port_state value; 4747 char *name; 4748 } iscsi_port_state_names[] = { 4749 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4750 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4751 }; 4752 4753 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4754 { 4755 int i; 4756 char *state = "Unknown!"; 4757 struct iscsi_cls_host *ihost = shost->shost_data; 4758 uint32_t port_state = ihost->port_state; 4759 4760 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4761 if (iscsi_port_state_names[i].value & port_state) { 4762 state = iscsi_port_state_names[i].name; 4763 break; 4764 } 4765 } 4766 return state; 4767 } 4768 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4769 4770 static int iscsi_session_match(struct attribute_container *cont, 4771 struct device *dev) 4772 { 4773 struct iscsi_cls_session *session; 4774 struct Scsi_Host *shost; 4775 struct iscsi_internal *priv; 4776 4777 if (!iscsi_is_session_dev(dev)) 4778 return 0; 4779 4780 session = iscsi_dev_to_session(dev); 4781 shost = iscsi_session_to_shost(session); 4782 if (!shost->transportt) 4783 return 0; 4784 4785 priv = to_iscsi_internal(shost->transportt); 4786 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4787 return 0; 4788 4789 return &priv->session_cont.ac == cont; 4790 } 4791 4792 static int iscsi_conn_match(struct attribute_container *cont, 4793 struct device *dev) 4794 { 4795 struct iscsi_cls_session *session; 4796 struct iscsi_cls_conn *conn; 4797 struct Scsi_Host *shost; 4798 struct iscsi_internal *priv; 4799 4800 if (!iscsi_is_conn_dev(dev)) 4801 return 0; 4802 4803 conn = iscsi_dev_to_conn(dev); 4804 session = iscsi_dev_to_session(conn->dev.parent); 4805 shost = iscsi_session_to_shost(session); 4806 4807 if (!shost->transportt) 4808 return 0; 4809 4810 priv = to_iscsi_internal(shost->transportt); 4811 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4812 return 0; 4813 4814 return &priv->conn_cont.ac == cont; 4815 } 4816 4817 static int iscsi_host_match(struct attribute_container *cont, 4818 struct device *dev) 4819 { 4820 struct Scsi_Host *shost; 4821 struct iscsi_internal *priv; 4822 4823 if (!scsi_is_host_device(dev)) 4824 return 0; 4825 4826 shost = dev_to_shost(dev); 4827 if (!shost->transportt || 4828 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4829 return 0; 4830 4831 priv = to_iscsi_internal(shost->transportt); 4832 return &priv->t.host_attrs.ac == cont; 4833 } 4834 4835 struct scsi_transport_template * 4836 iscsi_register_transport(struct iscsi_transport *tt) 4837 { 4838 struct iscsi_internal *priv; 4839 unsigned long flags; 4840 int err; 4841 4842 BUG_ON(!tt); 4843 WARN_ON(tt->ep_disconnect && !tt->unbind_conn); 4844 4845 priv = iscsi_if_transport_lookup(tt); 4846 if (priv) 4847 return NULL; 4848 4849 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4850 if (!priv) 4851 return NULL; 4852 INIT_LIST_HEAD(&priv->list); 4853 priv->iscsi_transport = tt; 4854 priv->t.user_scan = iscsi_user_scan; 4855 4856 priv->dev.class = &iscsi_transport_class; 4857 dev_set_name(&priv->dev, "%s", tt->name); 4858 err = device_register(&priv->dev); 4859 if (err) 4860 goto put_dev; 4861 4862 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4863 if (err) 4864 goto unregister_dev; 4865 4866 /* host parameters */ 4867 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4868 priv->t.host_attrs.ac.match = iscsi_host_match; 4869 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4870 priv->t.host_size = sizeof(struct iscsi_cls_host); 4871 transport_container_register(&priv->t.host_attrs); 4872 4873 /* connection parameters */ 4874 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4875 priv->conn_cont.ac.match = iscsi_conn_match; 4876 priv->conn_cont.ac.grp = &iscsi_conn_group; 4877 transport_container_register(&priv->conn_cont); 4878 4879 /* session parameters */ 4880 priv->session_cont.ac.class = &iscsi_session_class.class; 4881 priv->session_cont.ac.match = iscsi_session_match; 4882 priv->session_cont.ac.grp = &iscsi_session_group; 4883 transport_container_register(&priv->session_cont); 4884 4885 spin_lock_irqsave(&iscsi_transport_lock, flags); 4886 list_add(&priv->list, &iscsi_transports); 4887 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4888 4889 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4890 return &priv->t; 4891 4892 unregister_dev: 4893 device_unregister(&priv->dev); 4894 return NULL; 4895 put_dev: 4896 put_device(&priv->dev); 4897 return NULL; 4898 } 4899 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4900 4901 void iscsi_unregister_transport(struct iscsi_transport *tt) 4902 { 4903 struct iscsi_internal *priv; 4904 unsigned long flags; 4905 4906 BUG_ON(!tt); 4907 4908 mutex_lock(&rx_queue_mutex); 4909 4910 priv = iscsi_if_transport_lookup(tt); 4911 BUG_ON (!priv); 4912 4913 spin_lock_irqsave(&iscsi_transport_lock, flags); 4914 list_del(&priv->list); 4915 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4916 4917 transport_container_unregister(&priv->conn_cont); 4918 transport_container_unregister(&priv->session_cont); 4919 transport_container_unregister(&priv->t.host_attrs); 4920 4921 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4922 device_unregister(&priv->dev); 4923 mutex_unlock(&rx_queue_mutex); 4924 } 4925 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4926 4927 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4928 struct device *dev, const char *fmt, ...) 4929 { 4930 struct va_format vaf; 4931 va_list args; 4932 4933 va_start(args, fmt); 4934 vaf.fmt = fmt; 4935 vaf.va = &args; 4936 trace(dev, &vaf); 4937 va_end(args); 4938 } 4939 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4940 4941 static __init int iscsi_transport_init(void) 4942 { 4943 int err; 4944 struct netlink_kernel_cfg cfg = { 4945 .groups = 1, 4946 .input = iscsi_if_rx, 4947 }; 4948 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4949 ISCSI_TRANSPORT_VERSION); 4950 4951 atomic_set(&iscsi_session_nr, 0); 4952 4953 err = class_register(&iscsi_transport_class); 4954 if (err) 4955 return err; 4956 4957 err = class_register(&iscsi_endpoint_class); 4958 if (err) 4959 goto unregister_transport_class; 4960 4961 err = class_register(&iscsi_iface_class); 4962 if (err) 4963 goto unregister_endpoint_class; 4964 4965 err = transport_class_register(&iscsi_host_class); 4966 if (err) 4967 goto unregister_iface_class; 4968 4969 err = transport_class_register(&iscsi_connection_class); 4970 if (err) 4971 goto unregister_host_class; 4972 4973 err = transport_class_register(&iscsi_session_class); 4974 if (err) 4975 goto unregister_conn_class; 4976 4977 err = bus_register(&iscsi_flashnode_bus); 4978 if (err) 4979 goto unregister_session_class; 4980 4981 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4982 if (!nls) { 4983 err = -ENOBUFS; 4984 goto unregister_flashnode_bus; 4985 } 4986 4987 iscsi_conn_cleanup_workq = alloc_workqueue("%s", 4988 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 4989 "iscsi_conn_cleanup"); 4990 if (!iscsi_conn_cleanup_workq) { 4991 err = -ENOMEM; 4992 goto release_nls; 4993 } 4994 4995 return 0; 4996 4997 release_nls: 4998 netlink_kernel_release(nls); 4999 unregister_flashnode_bus: 5000 bus_unregister(&iscsi_flashnode_bus); 5001 unregister_session_class: 5002 transport_class_unregister(&iscsi_session_class); 5003 unregister_conn_class: 5004 transport_class_unregister(&iscsi_connection_class); 5005 unregister_host_class: 5006 transport_class_unregister(&iscsi_host_class); 5007 unregister_iface_class: 5008 class_unregister(&iscsi_iface_class); 5009 unregister_endpoint_class: 5010 class_unregister(&iscsi_endpoint_class); 5011 unregister_transport_class: 5012 class_unregister(&iscsi_transport_class); 5013 return err; 5014 } 5015 5016 static void __exit iscsi_transport_exit(void) 5017 { 5018 destroy_workqueue(iscsi_conn_cleanup_workq); 5019 netlink_kernel_release(nls); 5020 bus_unregister(&iscsi_flashnode_bus); 5021 transport_class_unregister(&iscsi_connection_class); 5022 transport_class_unregister(&iscsi_session_class); 5023 transport_class_unregister(&iscsi_host_class); 5024 class_unregister(&iscsi_endpoint_class); 5025 class_unregister(&iscsi_iface_class); 5026 class_unregister(&iscsi_transport_class); 5027 } 5028 5029 module_init(iscsi_transport_init); 5030 module_exit(iscsi_transport_exit); 5031 5032 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 5033 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 5034 "Alex Aizman <itn780@yahoo.com>"); 5035 MODULE_DESCRIPTION("iSCSI Transport Interface"); 5036 MODULE_LICENSE("GPL"); 5037 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 5038 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 5039