1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * iSCSI transport class definitions 4 * 5 * Copyright (C) IBM Corporation, 2004 6 * Copyright (C) Mike Christie, 2004 - 2005 7 * Copyright (C) Dmitry Yusupov, 2004 - 2005 8 * Copyright (C) Alex Aizman, 2004 - 2005 9 */ 10 #include <linux/module.h> 11 #include <linux/mutex.h> 12 #include <linux/slab.h> 13 #include <linux/bsg-lib.h> 14 #include <linux/idr.h> 15 #include <net/tcp.h> 16 #include <scsi/scsi.h> 17 #include <scsi/scsi_host.h> 18 #include <scsi/scsi_device.h> 19 #include <scsi/scsi_transport.h> 20 #include <scsi/scsi_transport_iscsi.h> 21 #include <scsi/iscsi_if.h> 22 #include <scsi/scsi_cmnd.h> 23 #include <scsi/scsi_bsg_iscsi.h> 24 25 #define ISCSI_TRANSPORT_VERSION "2.0-870" 26 27 #define ISCSI_SEND_MAX_ALLOWED 10 28 29 #define CREATE_TRACE_POINTS 30 #include <trace/events/iscsi.h> 31 32 /* 33 * Export tracepoint symbols to be used by other modules. 34 */ 35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn); 36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh); 37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session); 38 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp); 39 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp); 40 41 static int dbg_session; 42 module_param_named(debug_session, dbg_session, int, 43 S_IRUGO | S_IWUSR); 44 MODULE_PARM_DESC(debug_session, 45 "Turn on debugging for sessions in scsi_transport_iscsi " 46 "module. Set to 1 to turn on, and zero to turn off. Default " 47 "is off."); 48 49 static int dbg_conn; 50 module_param_named(debug_conn, dbg_conn, int, 51 S_IRUGO | S_IWUSR); 52 MODULE_PARM_DESC(debug_conn, 53 "Turn on debugging for connections in scsi_transport_iscsi " 54 "module. Set to 1 to turn on, and zero to turn off. Default " 55 "is off."); 56 57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ 58 do { \ 59 if (dbg_session) \ 60 iscsi_cls_session_printk(KERN_INFO, _session, \ 61 "%s: " dbg_fmt, \ 62 __func__, ##arg); \ 63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \ 64 &(_session)->dev, \ 65 "%s " dbg_fmt, __func__, ##arg); \ 66 } while (0); 67 68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ 69 do { \ 70 if (dbg_conn) \ 71 iscsi_cls_conn_printk(KERN_INFO, _conn, \ 72 "%s: " dbg_fmt, \ 73 __func__, ##arg); \ 74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \ 75 &(_conn)->dev, \ 76 "%s " dbg_fmt, __func__, ##arg); \ 77 } while (0); 78 79 struct iscsi_internal { 80 struct scsi_transport_template t; 81 struct iscsi_transport *iscsi_transport; 82 struct list_head list; 83 struct device dev; 84 85 struct transport_container conn_cont; 86 struct transport_container session_cont; 87 }; 88 89 /* Worker to perform connection failure on unresponsive connections 90 * completely in kernel space. 91 */ 92 static void stop_conn_work_fn(struct work_struct *work); 93 static DECLARE_WORK(stop_conn_work, stop_conn_work_fn); 94 95 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ 96 static struct workqueue_struct *iscsi_eh_timer_workq; 97 98 static struct workqueue_struct *iscsi_destroy_workq; 99 100 static DEFINE_IDA(iscsi_sess_ida); 101 /* 102 * list of registered transports and lock that must 103 * be held while accessing list. The iscsi_transport_lock must 104 * be acquired after the rx_queue_mutex. 105 */ 106 static LIST_HEAD(iscsi_transports); 107 static DEFINE_SPINLOCK(iscsi_transport_lock); 108 109 #define to_iscsi_internal(tmpl) \ 110 container_of(tmpl, struct iscsi_internal, t) 111 112 #define dev_to_iscsi_internal(_dev) \ 113 container_of(_dev, struct iscsi_internal, dev) 114 115 static void iscsi_transport_release(struct device *dev) 116 { 117 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 118 kfree(priv); 119 } 120 121 /* 122 * iscsi_transport_class represents the iscsi_transports that are 123 * registered. 124 */ 125 static struct class iscsi_transport_class = { 126 .name = "iscsi_transport", 127 .dev_release = iscsi_transport_release, 128 }; 129 130 static ssize_t 131 show_transport_handle(struct device *dev, struct device_attribute *attr, 132 char *buf) 133 { 134 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 135 return sprintf(buf, "%llu\n", (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 sprintf(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 kfree(ep); 175 } 176 177 static struct class iscsi_endpoint_class = { 178 .name = "iscsi_endpoint", 179 .dev_release = iscsi_endpoint_release, 180 }; 181 182 static ssize_t 183 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) 184 { 185 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 186 return sprintf(buf, "%llu\n", (unsigned long long) ep->id); 187 } 188 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); 189 190 static struct attribute *iscsi_endpoint_attrs[] = { 191 &dev_attr_ep_handle.attr, 192 NULL, 193 }; 194 195 static struct attribute_group iscsi_endpoint_group = { 196 .attrs = iscsi_endpoint_attrs, 197 }; 198 199 #define ISCSI_MAX_EPID -1 200 201 static int iscsi_match_epid(struct device *dev, const void *data) 202 { 203 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 204 const uint64_t *epid = data; 205 206 return *epid == ep->id; 207 } 208 209 struct iscsi_endpoint * 210 iscsi_create_endpoint(int dd_size) 211 { 212 struct device *dev; 213 struct iscsi_endpoint *ep; 214 uint64_t id; 215 int err; 216 217 for (id = 1; id < ISCSI_MAX_EPID; id++) { 218 dev = class_find_device(&iscsi_endpoint_class, NULL, &id, 219 iscsi_match_epid); 220 if (!dev) 221 break; 222 else 223 put_device(dev); 224 } 225 if (id == ISCSI_MAX_EPID) { 226 printk(KERN_ERR "Too many connections. Max supported %u\n", 227 ISCSI_MAX_EPID - 1); 228 return NULL; 229 } 230 231 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); 232 if (!ep) 233 return NULL; 234 235 ep->id = id; 236 ep->dev.class = &iscsi_endpoint_class; 237 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); 238 err = device_register(&ep->dev); 239 if (err) 240 goto free_ep; 241 242 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); 243 if (err) 244 goto unregister_dev; 245 246 if (dd_size) 247 ep->dd_data = &ep[1]; 248 return ep; 249 250 unregister_dev: 251 device_unregister(&ep->dev); 252 return NULL; 253 254 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 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 268 { 269 struct iscsi_endpoint *ep; 270 struct device *dev; 271 272 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, 273 iscsi_match_epid); 274 if (!dev) 275 return NULL; 276 277 ep = iscsi_dev_to_endpoint(dev); 278 /* 279 * we can drop this now because the interface will prevent 280 * removals and lookups from racing. 281 */ 282 put_device(dev); 283 return ep; 284 } 285 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 286 287 /* 288 * Interface to display network param to sysfs 289 */ 290 291 static void iscsi_iface_release(struct device *dev) 292 { 293 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 294 struct device *parent = iface->dev.parent; 295 296 kfree(iface); 297 put_device(parent); 298 } 299 300 301 static struct class iscsi_iface_class = { 302 .name = "iscsi_iface", 303 .dev_release = iscsi_iface_release, 304 }; 305 306 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 307 struct device_attribute dev_attr_##_prefix##_##_name = \ 308 __ATTR(_name, _mode, _show, _store) 309 310 /* iface attrs show */ 311 #define iscsi_iface_attr_show(type, name, param_type, param) \ 312 static ssize_t \ 313 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 314 char *buf) \ 315 { \ 316 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 317 struct iscsi_transport *t = iface->transport; \ 318 return t->get_iface_param(iface, param_type, param, buf); \ 319 } \ 320 321 #define iscsi_iface_net_attr(type, name, param) \ 322 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 323 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 324 325 #define iscsi_iface_attr(type, name, param) \ 326 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 327 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 328 329 /* generic read only ipv4 attribute */ 330 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 331 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 332 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 333 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 334 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 335 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 336 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 337 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 338 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 339 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 340 iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 341 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 342 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 343 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 344 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 345 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 346 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 347 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 348 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 349 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 350 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 351 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 352 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 353 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 354 iscsi_iface_net_attr(ipv4_iface, fragment_disable, 355 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 356 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 357 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 358 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 359 360 /* generic read only ipv6 attribute */ 361 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 362 iscsi_iface_net_attr(ipv6_iface, link_local_addr, 363 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 364 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 365 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 366 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 367 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 368 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 369 iscsi_iface_net_attr(ipv6_iface, link_local_state, 370 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 371 iscsi_iface_net_attr(ipv6_iface, router_state, 372 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 373 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 374 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 375 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 376 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 377 iscsi_iface_net_attr(ipv6_iface, traffic_class, 378 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 379 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 380 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 381 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 382 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 383 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 384 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 385 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 386 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 387 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 388 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 389 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 390 391 /* common read only iface attribute */ 392 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 393 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 394 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 395 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 396 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 397 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 398 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 399 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 400 iscsi_iface_net_attr(iface, tcp_nagle_disable, 401 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 402 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 403 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 404 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 405 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 406 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 407 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 408 409 /* common iscsi specific settings attributes */ 410 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 411 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 412 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 413 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 414 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 415 iscsi_iface_attr(iface, data_seq_in_order, 416 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 417 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 418 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 419 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 420 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 421 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 422 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 423 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 424 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 425 iscsi_iface_attr(iface, discovery_auth_optional, 426 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 427 iscsi_iface_attr(iface, discovery_logout, 428 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 429 iscsi_iface_attr(iface, strict_login_comp_en, 430 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 431 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 432 433 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 434 struct attribute *attr, int i) 435 { 436 struct device *dev = container_of(kobj, struct device, kobj); 437 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 438 struct iscsi_transport *t = iface->transport; 439 int param; 440 int param_type; 441 442 if (attr == &dev_attr_iface_enabled.attr) 443 param = ISCSI_NET_PARAM_IFACE_ENABLE; 444 else if (attr == &dev_attr_iface_vlan_id.attr) 445 param = ISCSI_NET_PARAM_VLAN_ID; 446 else if (attr == &dev_attr_iface_vlan_priority.attr) 447 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 448 else if (attr == &dev_attr_iface_vlan_enabled.attr) 449 param = ISCSI_NET_PARAM_VLAN_ENABLED; 450 else if (attr == &dev_attr_iface_mtu.attr) 451 param = ISCSI_NET_PARAM_MTU; 452 else if (attr == &dev_attr_iface_port.attr) 453 param = ISCSI_NET_PARAM_PORT; 454 else if (attr == &dev_attr_iface_ipaddress_state.attr) 455 param = ISCSI_NET_PARAM_IPADDR_STATE; 456 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 457 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 458 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 459 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 460 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 461 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 462 else if (attr == &dev_attr_iface_tcp_wsf.attr) 463 param = ISCSI_NET_PARAM_TCP_WSF; 464 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 465 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 466 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 467 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 468 else if (attr == &dev_attr_iface_cache_id.attr) 469 param = ISCSI_NET_PARAM_CACHE_ID; 470 else if (attr == &dev_attr_iface_redirect_en.attr) 471 param = ISCSI_NET_PARAM_REDIRECT_EN; 472 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 473 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 474 else if (attr == &dev_attr_iface_header_digest.attr) 475 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 476 else if (attr == &dev_attr_iface_data_digest.attr) 477 param = ISCSI_IFACE_PARAM_DATADGST_EN; 478 else if (attr == &dev_attr_iface_immediate_data.attr) 479 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 480 else if (attr == &dev_attr_iface_initial_r2t.attr) 481 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 482 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 483 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 484 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 485 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 486 else if (attr == &dev_attr_iface_erl.attr) 487 param = ISCSI_IFACE_PARAM_ERL; 488 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 489 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 490 else if (attr == &dev_attr_iface_first_burst_len.attr) 491 param = ISCSI_IFACE_PARAM_FIRST_BURST; 492 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 493 param = ISCSI_IFACE_PARAM_MAX_R2T; 494 else if (attr == &dev_attr_iface_max_burst_len.attr) 495 param = ISCSI_IFACE_PARAM_MAX_BURST; 496 else if (attr == &dev_attr_iface_chap_auth.attr) 497 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 498 else if (attr == &dev_attr_iface_bidi_chap.attr) 499 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 500 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 501 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 502 else if (attr == &dev_attr_iface_discovery_logout.attr) 503 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 504 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 505 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 506 else if (attr == &dev_attr_iface_initiator_name.attr) 507 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 508 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 509 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 510 param = ISCSI_NET_PARAM_IPV4_ADDR; 511 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 512 param = ISCSI_NET_PARAM_IPV4_GW; 513 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 514 param = ISCSI_NET_PARAM_IPV4_SUBNET; 515 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 516 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 517 else if (attr == 518 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 519 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 520 else if (attr == 521 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 522 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 523 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 524 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 525 else if (attr == &dev_attr_ipv4_iface_tos.attr) 526 param = ISCSI_NET_PARAM_IPV4_TOS; 527 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 528 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 529 else if (attr == 530 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 531 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 532 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 533 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 534 else if (attr == 535 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 536 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 537 else if (attr == 538 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 539 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 540 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 541 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 542 else if (attr == 543 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 544 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 545 else if (attr == 546 &dev_attr_ipv4_iface_fragment_disable.attr) 547 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 548 else if (attr == 549 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 550 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 551 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 552 param = ISCSI_NET_PARAM_IPV4_TTL; 553 else 554 return 0; 555 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 556 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 557 param = ISCSI_NET_PARAM_IPV6_ADDR; 558 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 559 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 560 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 561 param = ISCSI_NET_PARAM_IPV6_ROUTER; 562 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 563 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 564 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 565 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 566 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 567 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 568 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 569 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 570 else if (attr == 571 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 572 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 573 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 574 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 575 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 576 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 577 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 578 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 579 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 580 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 581 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 582 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 583 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 584 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 585 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 586 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 587 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 588 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 589 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 590 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 591 else 592 return 0; 593 } else { 594 WARN_ONCE(1, "Invalid iface attr"); 595 return 0; 596 } 597 598 switch (param) { 599 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO: 600 case ISCSI_IFACE_PARAM_HDRDGST_EN: 601 case ISCSI_IFACE_PARAM_DATADGST_EN: 602 case ISCSI_IFACE_PARAM_IMM_DATA_EN: 603 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN: 604 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN: 605 case ISCSI_IFACE_PARAM_PDU_INORDER_EN: 606 case ISCSI_IFACE_PARAM_ERL: 607 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH: 608 case ISCSI_IFACE_PARAM_FIRST_BURST: 609 case ISCSI_IFACE_PARAM_MAX_R2T: 610 case ISCSI_IFACE_PARAM_MAX_BURST: 611 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN: 612 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN: 613 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL: 614 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN: 615 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN: 616 case ISCSI_IFACE_PARAM_INITIATOR_NAME: 617 param_type = ISCSI_IFACE_PARAM; 618 break; 619 default: 620 param_type = ISCSI_NET_PARAM; 621 } 622 623 return t->attr_is_visible(param_type, param); 624 } 625 626 static struct attribute *iscsi_iface_attrs[] = { 627 &dev_attr_iface_enabled.attr, 628 &dev_attr_iface_vlan_id.attr, 629 &dev_attr_iface_vlan_priority.attr, 630 &dev_attr_iface_vlan_enabled.attr, 631 &dev_attr_ipv4_iface_ipaddress.attr, 632 &dev_attr_ipv4_iface_gateway.attr, 633 &dev_attr_ipv4_iface_subnet.attr, 634 &dev_attr_ipv4_iface_bootproto.attr, 635 &dev_attr_ipv6_iface_ipaddress.attr, 636 &dev_attr_ipv6_iface_link_local_addr.attr, 637 &dev_attr_ipv6_iface_router_addr.attr, 638 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 639 &dev_attr_ipv6_iface_link_local_autocfg.attr, 640 &dev_attr_iface_mtu.attr, 641 &dev_attr_iface_port.attr, 642 &dev_attr_iface_ipaddress_state.attr, 643 &dev_attr_iface_delayed_ack_en.attr, 644 &dev_attr_iface_tcp_nagle_disable.attr, 645 &dev_attr_iface_tcp_wsf_disable.attr, 646 &dev_attr_iface_tcp_wsf.attr, 647 &dev_attr_iface_tcp_timer_scale.attr, 648 &dev_attr_iface_tcp_timestamp_en.attr, 649 &dev_attr_iface_cache_id.attr, 650 &dev_attr_iface_redirect_en.attr, 651 &dev_attr_iface_def_taskmgmt_tmo.attr, 652 &dev_attr_iface_header_digest.attr, 653 &dev_attr_iface_data_digest.attr, 654 &dev_attr_iface_immediate_data.attr, 655 &dev_attr_iface_initial_r2t.attr, 656 &dev_attr_iface_data_seq_in_order.attr, 657 &dev_attr_iface_data_pdu_in_order.attr, 658 &dev_attr_iface_erl.attr, 659 &dev_attr_iface_max_recv_dlength.attr, 660 &dev_attr_iface_first_burst_len.attr, 661 &dev_attr_iface_max_outstanding_r2t.attr, 662 &dev_attr_iface_max_burst_len.attr, 663 &dev_attr_iface_chap_auth.attr, 664 &dev_attr_iface_bidi_chap.attr, 665 &dev_attr_iface_discovery_auth_optional.attr, 666 &dev_attr_iface_discovery_logout.attr, 667 &dev_attr_iface_strict_login_comp_en.attr, 668 &dev_attr_iface_initiator_name.attr, 669 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 670 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 671 &dev_attr_ipv4_iface_tos_en.attr, 672 &dev_attr_ipv4_iface_tos.attr, 673 &dev_attr_ipv4_iface_grat_arp_en.attr, 674 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 675 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 676 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 677 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 678 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 679 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 680 &dev_attr_ipv4_iface_fragment_disable.attr, 681 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 682 &dev_attr_ipv4_iface_ttl.attr, 683 &dev_attr_ipv6_iface_link_local_state.attr, 684 &dev_attr_ipv6_iface_router_state.attr, 685 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 686 &dev_attr_ipv6_iface_mld_en.attr, 687 &dev_attr_ipv6_iface_flow_label.attr, 688 &dev_attr_ipv6_iface_traffic_class.attr, 689 &dev_attr_ipv6_iface_hop_limit.attr, 690 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 691 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 692 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 693 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 694 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 695 NULL, 696 }; 697 698 static struct attribute_group iscsi_iface_group = { 699 .attrs = iscsi_iface_attrs, 700 .is_visible = iscsi_iface_attr_is_visible, 701 }; 702 703 /* convert iscsi_ipaddress_state values to ascii string name */ 704 static const struct { 705 enum iscsi_ipaddress_state value; 706 char *name; 707 } iscsi_ipaddress_state_names[] = { 708 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 709 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 710 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 711 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 712 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 713 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 714 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 715 }; 716 717 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 718 { 719 int i; 720 char *state = NULL; 721 722 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 723 if (iscsi_ipaddress_state_names[i].value == port_state) { 724 state = iscsi_ipaddress_state_names[i].name; 725 break; 726 } 727 } 728 return state; 729 } 730 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 731 732 /* convert iscsi_router_state values to ascii string name */ 733 static const struct { 734 enum iscsi_router_state value; 735 char *name; 736 } iscsi_router_state_names[] = { 737 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 738 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 739 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 740 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 741 }; 742 743 char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 744 { 745 int i; 746 char *state = NULL; 747 748 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 749 if (iscsi_router_state_names[i].value == router_state) { 750 state = iscsi_router_state_names[i].name; 751 break; 752 } 753 } 754 return state; 755 } 756 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 757 758 struct iscsi_iface * 759 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 760 uint32_t iface_type, uint32_t iface_num, int dd_size) 761 { 762 struct iscsi_iface *iface; 763 int err; 764 765 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 766 if (!iface) 767 return NULL; 768 769 iface->transport = transport; 770 iface->iface_type = iface_type; 771 iface->iface_num = iface_num; 772 iface->dev.release = iscsi_iface_release; 773 iface->dev.class = &iscsi_iface_class; 774 /* parent reference released in iscsi_iface_release */ 775 iface->dev.parent = get_device(&shost->shost_gendev); 776 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 777 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 778 iface_num); 779 else 780 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 781 iface_num); 782 783 err = device_register(&iface->dev); 784 if (err) 785 goto free_iface; 786 787 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 788 if (err) 789 goto unreg_iface; 790 791 if (dd_size) 792 iface->dd_data = &iface[1]; 793 return iface; 794 795 unreg_iface: 796 device_unregister(&iface->dev); 797 return NULL; 798 799 free_iface: 800 put_device(iface->dev.parent); 801 kfree(iface); 802 return NULL; 803 } 804 EXPORT_SYMBOL_GPL(iscsi_create_iface); 805 806 void iscsi_destroy_iface(struct iscsi_iface *iface) 807 { 808 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 809 device_unregister(&iface->dev); 810 } 811 EXPORT_SYMBOL_GPL(iscsi_destroy_iface); 812 813 /* 814 * Interface to display flash node params to sysfs 815 */ 816 817 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ 818 struct device_attribute dev_attr_##_prefix##_##_name = \ 819 __ATTR(_name, _mode, _show, _store) 820 821 /* flash node session attrs show */ 822 #define iscsi_flashnode_sess_attr_show(type, name, param) \ 823 static ssize_t \ 824 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 825 char *buf) \ 826 { \ 827 struct iscsi_bus_flash_session *fnode_sess = \ 828 iscsi_dev_to_flash_session(dev);\ 829 struct iscsi_transport *t = fnode_sess->transport; \ 830 return t->get_flashnode_param(fnode_sess, param, buf); \ 831 } \ 832 833 834 #define iscsi_flashnode_sess_attr(type, name, param) \ 835 iscsi_flashnode_sess_attr_show(type, name, param) \ 836 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 837 show_##type##_##name, NULL); 838 839 /* Flash node session attributes */ 840 841 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 842 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 843 iscsi_flashnode_sess_attr(fnode, discovery_session, 844 ISCSI_FLASHNODE_DISCOVERY_SESS); 845 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 846 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 847 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 848 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 849 iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 850 ISCSI_FLASHNODE_DATASEQ_INORDER); 851 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 852 ISCSI_FLASHNODE_PDU_INORDER); 853 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 854 iscsi_flashnode_sess_attr(fnode, discovery_logout, 855 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 856 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 857 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 858 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 859 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 860 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 861 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 862 iscsi_flashnode_sess_attr(fnode, def_time2retain, 863 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 864 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 865 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 866 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 867 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 868 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 869 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 870 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 871 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 872 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 873 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 874 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 875 iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 876 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 877 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 878 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 879 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 880 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 881 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 882 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 883 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 884 885 static struct attribute *iscsi_flashnode_sess_attrs[] = { 886 &dev_attr_fnode_auto_snd_tgt_disable.attr, 887 &dev_attr_fnode_discovery_session.attr, 888 &dev_attr_fnode_portal_type.attr, 889 &dev_attr_fnode_entry_enable.attr, 890 &dev_attr_fnode_immediate_data.attr, 891 &dev_attr_fnode_initial_r2t.attr, 892 &dev_attr_fnode_data_seq_in_order.attr, 893 &dev_attr_fnode_data_pdu_in_order.attr, 894 &dev_attr_fnode_chap_auth.attr, 895 &dev_attr_fnode_discovery_logout.attr, 896 &dev_attr_fnode_bidi_chap.attr, 897 &dev_attr_fnode_discovery_auth_optional.attr, 898 &dev_attr_fnode_erl.attr, 899 &dev_attr_fnode_first_burst_len.attr, 900 &dev_attr_fnode_def_time2wait.attr, 901 &dev_attr_fnode_def_time2retain.attr, 902 &dev_attr_fnode_max_outstanding_r2t.attr, 903 &dev_attr_fnode_isid.attr, 904 &dev_attr_fnode_tsid.attr, 905 &dev_attr_fnode_max_burst_len.attr, 906 &dev_attr_fnode_def_taskmgmt_tmo.attr, 907 &dev_attr_fnode_targetalias.attr, 908 &dev_attr_fnode_targetname.attr, 909 &dev_attr_fnode_tpgt.attr, 910 &dev_attr_fnode_discovery_parent_idx.attr, 911 &dev_attr_fnode_discovery_parent_type.attr, 912 &dev_attr_fnode_chap_in_idx.attr, 913 &dev_attr_fnode_chap_out_idx.attr, 914 &dev_attr_fnode_username.attr, 915 &dev_attr_fnode_username_in.attr, 916 &dev_attr_fnode_password.attr, 917 &dev_attr_fnode_password_in.attr, 918 &dev_attr_fnode_is_boot_target.attr, 919 NULL, 920 }; 921 922 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, 923 struct attribute *attr, 924 int i) 925 { 926 struct device *dev = container_of(kobj, struct device, kobj); 927 struct iscsi_bus_flash_session *fnode_sess = 928 iscsi_dev_to_flash_session(dev); 929 struct iscsi_transport *t = fnode_sess->transport; 930 int param; 931 932 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { 933 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; 934 } else if (attr == &dev_attr_fnode_discovery_session.attr) { 935 param = ISCSI_FLASHNODE_DISCOVERY_SESS; 936 } else if (attr == &dev_attr_fnode_portal_type.attr) { 937 param = ISCSI_FLASHNODE_PORTAL_TYPE; 938 } else if (attr == &dev_attr_fnode_entry_enable.attr) { 939 param = ISCSI_FLASHNODE_ENTRY_EN; 940 } else if (attr == &dev_attr_fnode_immediate_data.attr) { 941 param = ISCSI_FLASHNODE_IMM_DATA_EN; 942 } else if (attr == &dev_attr_fnode_initial_r2t.attr) { 943 param = ISCSI_FLASHNODE_INITIAL_R2T_EN; 944 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { 945 param = ISCSI_FLASHNODE_DATASEQ_INORDER; 946 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { 947 param = ISCSI_FLASHNODE_PDU_INORDER; 948 } else if (attr == &dev_attr_fnode_chap_auth.attr) { 949 param = ISCSI_FLASHNODE_CHAP_AUTH_EN; 950 } else if (attr == &dev_attr_fnode_discovery_logout.attr) { 951 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; 952 } else if (attr == &dev_attr_fnode_bidi_chap.attr) { 953 param = ISCSI_FLASHNODE_BIDI_CHAP_EN; 954 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { 955 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; 956 } else if (attr == &dev_attr_fnode_erl.attr) { 957 param = ISCSI_FLASHNODE_ERL; 958 } else if (attr == &dev_attr_fnode_first_burst_len.attr) { 959 param = ISCSI_FLASHNODE_FIRST_BURST; 960 } else if (attr == &dev_attr_fnode_def_time2wait.attr) { 961 param = ISCSI_FLASHNODE_DEF_TIME2WAIT; 962 } else if (attr == &dev_attr_fnode_def_time2retain.attr) { 963 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; 964 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { 965 param = ISCSI_FLASHNODE_MAX_R2T; 966 } else if (attr == &dev_attr_fnode_isid.attr) { 967 param = ISCSI_FLASHNODE_ISID; 968 } else if (attr == &dev_attr_fnode_tsid.attr) { 969 param = ISCSI_FLASHNODE_TSID; 970 } else if (attr == &dev_attr_fnode_max_burst_len.attr) { 971 param = ISCSI_FLASHNODE_MAX_BURST; 972 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { 973 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; 974 } else if (attr == &dev_attr_fnode_targetalias.attr) { 975 param = ISCSI_FLASHNODE_ALIAS; 976 } else if (attr == &dev_attr_fnode_targetname.attr) { 977 param = ISCSI_FLASHNODE_NAME; 978 } else if (attr == &dev_attr_fnode_tpgt.attr) { 979 param = ISCSI_FLASHNODE_TPGT; 980 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { 981 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; 982 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { 983 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; 984 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { 985 param = ISCSI_FLASHNODE_CHAP_IN_IDX; 986 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { 987 param = ISCSI_FLASHNODE_CHAP_OUT_IDX; 988 } else if (attr == &dev_attr_fnode_username.attr) { 989 param = ISCSI_FLASHNODE_USERNAME; 990 } else if (attr == &dev_attr_fnode_username_in.attr) { 991 param = ISCSI_FLASHNODE_USERNAME_IN; 992 } else if (attr == &dev_attr_fnode_password.attr) { 993 param = ISCSI_FLASHNODE_PASSWORD; 994 } else if (attr == &dev_attr_fnode_password_in.attr) { 995 param = ISCSI_FLASHNODE_PASSWORD_IN; 996 } else if (attr == &dev_attr_fnode_is_boot_target.attr) { 997 param = ISCSI_FLASHNODE_IS_BOOT_TGT; 998 } else { 999 WARN_ONCE(1, "Invalid flashnode session attr"); 1000 return 0; 1001 } 1002 1003 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1004 } 1005 1006 static struct attribute_group iscsi_flashnode_sess_attr_group = { 1007 .attrs = iscsi_flashnode_sess_attrs, 1008 .is_visible = iscsi_flashnode_sess_attr_is_visible, 1009 }; 1010 1011 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 1012 &iscsi_flashnode_sess_attr_group, 1013 NULL, 1014 }; 1015 1016 static void iscsi_flashnode_sess_release(struct device *dev) 1017 { 1018 struct iscsi_bus_flash_session *fnode_sess = 1019 iscsi_dev_to_flash_session(dev); 1020 1021 kfree(fnode_sess->targetname); 1022 kfree(fnode_sess->targetalias); 1023 kfree(fnode_sess->portal_type); 1024 kfree(fnode_sess); 1025 } 1026 1027 static const struct device_type iscsi_flashnode_sess_dev_type = { 1028 .name = "iscsi_flashnode_sess_dev_type", 1029 .groups = iscsi_flashnode_sess_attr_groups, 1030 .release = iscsi_flashnode_sess_release, 1031 }; 1032 1033 /* flash node connection attrs show */ 1034 #define iscsi_flashnode_conn_attr_show(type, name, param) \ 1035 static ssize_t \ 1036 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 1037 char *buf) \ 1038 { \ 1039 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ 1040 struct iscsi_bus_flash_session *fnode_sess = \ 1041 iscsi_flash_conn_to_flash_session(fnode_conn);\ 1042 struct iscsi_transport *t = fnode_conn->transport; \ 1043 return t->get_flashnode_param(fnode_sess, param, buf); \ 1044 } \ 1045 1046 1047 #define iscsi_flashnode_conn_attr(type, name, param) \ 1048 iscsi_flashnode_conn_attr_show(type, name, param) \ 1049 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1050 show_##type##_##name, NULL); 1051 1052 /* Flash node connection attributes */ 1053 1054 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1055 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1056 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1057 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1058 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1059 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1060 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1061 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1062 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1063 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1064 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1065 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1066 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1067 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1068 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1069 iscsi_flashnode_conn_attr(fnode, fragment_disable, 1070 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1071 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1072 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1073 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1074 iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1075 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1076 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1077 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1078 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1079 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1080 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1081 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1082 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1083 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1084 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1085 iscsi_flashnode_conn_attr(fnode, max_segment_size, 1086 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1087 iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1088 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1089 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1090 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1091 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1092 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1093 1094 static struct attribute *iscsi_flashnode_conn_attrs[] = { 1095 &dev_attr_fnode_is_fw_assigned_ipv6.attr, 1096 &dev_attr_fnode_header_digest.attr, 1097 &dev_attr_fnode_data_digest.attr, 1098 &dev_attr_fnode_snack_req.attr, 1099 &dev_attr_fnode_tcp_timestamp_stat.attr, 1100 &dev_attr_fnode_tcp_nagle_disable.attr, 1101 &dev_attr_fnode_tcp_wsf_disable.attr, 1102 &dev_attr_fnode_tcp_timer_scale.attr, 1103 &dev_attr_fnode_tcp_timestamp_enable.attr, 1104 &dev_attr_fnode_fragment_disable.attr, 1105 &dev_attr_fnode_max_recv_dlength.attr, 1106 &dev_attr_fnode_max_xmit_dlength.attr, 1107 &dev_attr_fnode_keepalive_tmo.attr, 1108 &dev_attr_fnode_port.attr, 1109 &dev_attr_fnode_ipaddress.attr, 1110 &dev_attr_fnode_redirect_ipaddr.attr, 1111 &dev_attr_fnode_max_segment_size.attr, 1112 &dev_attr_fnode_local_port.attr, 1113 &dev_attr_fnode_ipv4_tos.attr, 1114 &dev_attr_fnode_ipv6_traffic_class.attr, 1115 &dev_attr_fnode_ipv6_flow_label.attr, 1116 &dev_attr_fnode_link_local_ipv6.attr, 1117 &dev_attr_fnode_tcp_xmit_wsf.attr, 1118 &dev_attr_fnode_tcp_recv_wsf.attr, 1119 &dev_attr_fnode_statsn.attr, 1120 &dev_attr_fnode_exp_statsn.attr, 1121 NULL, 1122 }; 1123 1124 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, 1125 struct attribute *attr, 1126 int i) 1127 { 1128 struct device *dev = container_of(kobj, struct device, kobj); 1129 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1130 struct iscsi_transport *t = fnode_conn->transport; 1131 int param; 1132 1133 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { 1134 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; 1135 } else if (attr == &dev_attr_fnode_header_digest.attr) { 1136 param = ISCSI_FLASHNODE_HDR_DGST_EN; 1137 } else if (attr == &dev_attr_fnode_data_digest.attr) { 1138 param = ISCSI_FLASHNODE_DATA_DGST_EN; 1139 } else if (attr == &dev_attr_fnode_snack_req.attr) { 1140 param = ISCSI_FLASHNODE_SNACK_REQ_EN; 1141 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { 1142 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; 1143 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { 1144 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; 1145 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { 1146 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; 1147 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { 1148 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; 1149 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { 1150 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; 1151 } else if (attr == &dev_attr_fnode_fragment_disable.attr) { 1152 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; 1153 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { 1154 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; 1155 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { 1156 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; 1157 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { 1158 param = ISCSI_FLASHNODE_KEEPALIVE_TMO; 1159 } else if (attr == &dev_attr_fnode_port.attr) { 1160 param = ISCSI_FLASHNODE_PORT; 1161 } else if (attr == &dev_attr_fnode_ipaddress.attr) { 1162 param = ISCSI_FLASHNODE_IPADDR; 1163 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { 1164 param = ISCSI_FLASHNODE_REDIRECT_IPADDR; 1165 } else if (attr == &dev_attr_fnode_max_segment_size.attr) { 1166 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; 1167 } else if (attr == &dev_attr_fnode_local_port.attr) { 1168 param = ISCSI_FLASHNODE_LOCAL_PORT; 1169 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { 1170 param = ISCSI_FLASHNODE_IPV4_TOS; 1171 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { 1172 param = ISCSI_FLASHNODE_IPV6_TC; 1173 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { 1174 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; 1175 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { 1176 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; 1177 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { 1178 param = ISCSI_FLASHNODE_TCP_XMIT_WSF; 1179 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { 1180 param = ISCSI_FLASHNODE_TCP_RECV_WSF; 1181 } else if (attr == &dev_attr_fnode_statsn.attr) { 1182 param = ISCSI_FLASHNODE_STATSN; 1183 } else if (attr == &dev_attr_fnode_exp_statsn.attr) { 1184 param = ISCSI_FLASHNODE_EXP_STATSN; 1185 } else { 1186 WARN_ONCE(1, "Invalid flashnode connection attr"); 1187 return 0; 1188 } 1189 1190 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1191 } 1192 1193 static struct attribute_group iscsi_flashnode_conn_attr_group = { 1194 .attrs = iscsi_flashnode_conn_attrs, 1195 .is_visible = iscsi_flashnode_conn_attr_is_visible, 1196 }; 1197 1198 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1199 &iscsi_flashnode_conn_attr_group, 1200 NULL, 1201 }; 1202 1203 static void iscsi_flashnode_conn_release(struct device *dev) 1204 { 1205 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1206 1207 kfree(fnode_conn->ipaddress); 1208 kfree(fnode_conn->redirect_ipaddr); 1209 kfree(fnode_conn->link_local_ipv6_addr); 1210 kfree(fnode_conn); 1211 } 1212 1213 static const struct device_type iscsi_flashnode_conn_dev_type = { 1214 .name = "iscsi_flashnode_conn_dev_type", 1215 .groups = iscsi_flashnode_conn_attr_groups, 1216 .release = iscsi_flashnode_conn_release, 1217 }; 1218 1219 static struct bus_type iscsi_flashnode_bus; 1220 1221 int iscsi_flashnode_bus_match(struct device *dev, 1222 struct device_driver *drv) 1223 { 1224 if (dev->bus == &iscsi_flashnode_bus) 1225 return 1; 1226 return 0; 1227 } 1228 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1229 1230 static struct bus_type iscsi_flashnode_bus = { 1231 .name = "iscsi_flashnode", 1232 .match = &iscsi_flashnode_bus_match, 1233 }; 1234 1235 /** 1236 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs 1237 * @shost: pointer to host data 1238 * @index: index of flashnode to add in sysfs 1239 * @transport: pointer to transport data 1240 * @dd_size: total size to allocate 1241 * 1242 * Adds a sysfs entry for the flashnode session attributes 1243 * 1244 * Returns: 1245 * pointer to allocated flashnode sess on success 1246 * %NULL on failure 1247 */ 1248 struct iscsi_bus_flash_session * 1249 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, 1250 struct iscsi_transport *transport, 1251 int dd_size) 1252 { 1253 struct iscsi_bus_flash_session *fnode_sess; 1254 int err; 1255 1256 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); 1257 if (!fnode_sess) 1258 return NULL; 1259 1260 fnode_sess->transport = transport; 1261 fnode_sess->target_id = index; 1262 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; 1263 fnode_sess->dev.bus = &iscsi_flashnode_bus; 1264 fnode_sess->dev.parent = &shost->shost_gendev; 1265 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", 1266 shost->host_no, index); 1267 1268 err = device_register(&fnode_sess->dev); 1269 if (err) 1270 goto free_fnode_sess; 1271 1272 if (dd_size) 1273 fnode_sess->dd_data = &fnode_sess[1]; 1274 1275 return fnode_sess; 1276 1277 free_fnode_sess: 1278 kfree(fnode_sess); 1279 return NULL; 1280 } 1281 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); 1282 1283 /** 1284 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs 1285 * @shost: pointer to host data 1286 * @fnode_sess: pointer to the parent flashnode session entry 1287 * @transport: pointer to transport data 1288 * @dd_size: total size to allocate 1289 * 1290 * Adds a sysfs entry for the flashnode connection attributes 1291 * 1292 * Returns: 1293 * pointer to allocated flashnode conn on success 1294 * %NULL on failure 1295 */ 1296 struct iscsi_bus_flash_conn * 1297 iscsi_create_flashnode_conn(struct Scsi_Host *shost, 1298 struct iscsi_bus_flash_session *fnode_sess, 1299 struct iscsi_transport *transport, 1300 int dd_size) 1301 { 1302 struct iscsi_bus_flash_conn *fnode_conn; 1303 int err; 1304 1305 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); 1306 if (!fnode_conn) 1307 return NULL; 1308 1309 fnode_conn->transport = transport; 1310 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; 1311 fnode_conn->dev.bus = &iscsi_flashnode_bus; 1312 fnode_conn->dev.parent = &fnode_sess->dev; 1313 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", 1314 shost->host_no, fnode_sess->target_id); 1315 1316 err = device_register(&fnode_conn->dev); 1317 if (err) 1318 goto free_fnode_conn; 1319 1320 if (dd_size) 1321 fnode_conn->dd_data = &fnode_conn[1]; 1322 1323 return fnode_conn; 1324 1325 free_fnode_conn: 1326 kfree(fnode_conn); 1327 return NULL; 1328 } 1329 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); 1330 1331 /** 1332 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn 1333 * @dev: device to verify 1334 * @data: pointer to data containing value to use for verification 1335 * 1336 * Verifies if the passed device is flashnode conn device 1337 * 1338 * Returns: 1339 * 1 on success 1340 * 0 on failure 1341 */ 1342 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1343 { 1344 return dev->bus == &iscsi_flashnode_bus; 1345 } 1346 1347 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1348 { 1349 device_unregister(&fnode_conn->dev); 1350 return 0; 1351 } 1352 1353 static int flashnode_match_index(struct device *dev, void *data) 1354 { 1355 struct iscsi_bus_flash_session *fnode_sess = NULL; 1356 int ret = 0; 1357 1358 if (!iscsi_flashnode_bus_match(dev, NULL)) 1359 goto exit_match_index; 1360 1361 fnode_sess = iscsi_dev_to_flash_session(dev); 1362 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1363 1364 exit_match_index: 1365 return ret; 1366 } 1367 1368 /** 1369 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1370 * @shost: pointer to host data 1371 * @idx: index to match 1372 * 1373 * Finds the flashnode session object for the passed index 1374 * 1375 * Returns: 1376 * pointer to found flashnode session object on success 1377 * %NULL on failure 1378 */ 1379 static struct iscsi_bus_flash_session * 1380 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1381 { 1382 struct iscsi_bus_flash_session *fnode_sess = NULL; 1383 struct device *dev; 1384 1385 dev = device_find_child(&shost->shost_gendev, &idx, 1386 flashnode_match_index); 1387 if (dev) 1388 fnode_sess = iscsi_dev_to_flash_session(dev); 1389 1390 return fnode_sess; 1391 } 1392 1393 /** 1394 * iscsi_find_flashnode_sess - finds flashnode session entry 1395 * @shost: pointer to host data 1396 * @data: pointer to data containing value to use for comparison 1397 * @fn: function pointer that does actual comparison 1398 * 1399 * Finds the flashnode session object comparing the data passed using logic 1400 * defined in passed function pointer 1401 * 1402 * Returns: 1403 * pointer to found flashnode session device object on success 1404 * %NULL on failure 1405 */ 1406 struct device * 1407 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1408 int (*fn)(struct device *dev, void *data)) 1409 { 1410 return device_find_child(&shost->shost_gendev, data, fn); 1411 } 1412 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1413 1414 /** 1415 * iscsi_find_flashnode_conn - finds flashnode connection entry 1416 * @fnode_sess: pointer to parent flashnode session entry 1417 * 1418 * Finds the flashnode connection object comparing the data passed using logic 1419 * defined in passed function pointer 1420 * 1421 * Returns: 1422 * pointer to found flashnode connection device object on success 1423 * %NULL on failure 1424 */ 1425 struct device * 1426 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1427 { 1428 return device_find_child(&fnode_sess->dev, NULL, 1429 iscsi_is_flashnode_conn_dev); 1430 } 1431 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1432 1433 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1434 { 1435 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1436 return 0; 1437 1438 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1439 } 1440 1441 /** 1442 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1443 * @fnode_sess: pointer to flashnode session entry to be destroyed 1444 * 1445 * Deletes the flashnode session entry and all children flashnode connection 1446 * entries from sysfs 1447 */ 1448 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1449 { 1450 int err; 1451 1452 err = device_for_each_child(&fnode_sess->dev, NULL, 1453 iscsi_iter_destroy_flashnode_conn_fn); 1454 if (err) 1455 pr_err("Could not delete all connections for %s. Error %d.\n", 1456 fnode_sess->dev.kobj.name, err); 1457 1458 device_unregister(&fnode_sess->dev); 1459 } 1460 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1461 1462 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1463 { 1464 if (!iscsi_flashnode_bus_match(dev, NULL)) 1465 return 0; 1466 1467 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1468 return 0; 1469 } 1470 1471 /** 1472 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1473 * @shost: pointer to host data 1474 * 1475 * Destroys all the flashnode session entries and all corresponding children 1476 * flashnode connection entries from sysfs 1477 */ 1478 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1479 { 1480 device_for_each_child(&shost->shost_gendev, NULL, 1481 iscsi_iter_destroy_flashnode_fn); 1482 } 1483 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1484 1485 /* 1486 * BSG support 1487 */ 1488 /** 1489 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1490 * @job: bsg job to be processed 1491 */ 1492 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1493 { 1494 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1495 struct iscsi_bsg_request *req = job->request; 1496 struct iscsi_bsg_reply *reply = job->reply; 1497 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1498 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1499 int ret; 1500 1501 /* check if we have the msgcode value at least */ 1502 if (job->request_len < sizeof(uint32_t)) { 1503 ret = -ENOMSG; 1504 goto fail_host_msg; 1505 } 1506 1507 /* Validate the host command */ 1508 switch (req->msgcode) { 1509 case ISCSI_BSG_HST_VENDOR: 1510 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1511 if ((shost->hostt->vendor_id == 0L) || 1512 (req->rqst_data.h_vendor.vendor_id != 1513 shost->hostt->vendor_id)) { 1514 ret = -ESRCH; 1515 goto fail_host_msg; 1516 } 1517 break; 1518 default: 1519 ret = -EBADR; 1520 goto fail_host_msg; 1521 } 1522 1523 /* check if we really have all the request data needed */ 1524 if (job->request_len < cmdlen) { 1525 ret = -ENOMSG; 1526 goto fail_host_msg; 1527 } 1528 1529 ret = i->iscsi_transport->bsg_request(job); 1530 if (!ret) 1531 return 0; 1532 1533 fail_host_msg: 1534 /* return the errno failure code as the only status */ 1535 BUG_ON(job->reply_len < sizeof(uint32_t)); 1536 reply->reply_payload_rcv_len = 0; 1537 reply->result = ret; 1538 job->reply_len = sizeof(uint32_t); 1539 bsg_job_done(job, ret, 0); 1540 return 0; 1541 } 1542 1543 /** 1544 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1545 * @shost: shost for iscsi_host 1546 * @ihost: iscsi_cls_host adding the structures to 1547 */ 1548 static int 1549 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1550 { 1551 struct device *dev = &shost->shost_gendev; 1552 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1553 struct request_queue *q; 1554 char bsg_name[20]; 1555 1556 if (!i->iscsi_transport->bsg_request) 1557 return -ENOTSUPP; 1558 1559 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1560 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1561 if (IS_ERR(q)) { 1562 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1563 "initialize - no request queue\n"); 1564 return PTR_ERR(q); 1565 } 1566 __scsi_init_queue(shost, q); 1567 1568 ihost->bsg_q = q; 1569 return 0; 1570 } 1571 1572 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1573 struct device *cdev) 1574 { 1575 struct Scsi_Host *shost = dev_to_shost(dev); 1576 struct iscsi_cls_host *ihost = shost->shost_data; 1577 1578 memset(ihost, 0, sizeof(*ihost)); 1579 atomic_set(&ihost->nr_scans, 0); 1580 mutex_init(&ihost->mutex); 1581 1582 iscsi_bsg_host_add(shost, ihost); 1583 /* ignore any bsg add error - we just can't do sgio */ 1584 1585 return 0; 1586 } 1587 1588 static int iscsi_remove_host(struct transport_container *tc, 1589 struct device *dev, struct device *cdev) 1590 { 1591 struct Scsi_Host *shost = dev_to_shost(dev); 1592 struct iscsi_cls_host *ihost = shost->shost_data; 1593 1594 bsg_remove_queue(ihost->bsg_q); 1595 return 0; 1596 } 1597 1598 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1599 "iscsi_host", 1600 iscsi_setup_host, 1601 iscsi_remove_host, 1602 NULL); 1603 1604 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1605 "iscsi_session", 1606 NULL, 1607 NULL, 1608 NULL); 1609 1610 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1611 "iscsi_connection", 1612 NULL, 1613 NULL, 1614 NULL); 1615 1616 static struct sock *nls; 1617 static DEFINE_MUTEX(rx_queue_mutex); 1618 1619 static LIST_HEAD(sesslist); 1620 static LIST_HEAD(sessdestroylist); 1621 static DEFINE_SPINLOCK(sesslock); 1622 static LIST_HEAD(connlist); 1623 static LIST_HEAD(connlist_err); 1624 static DEFINE_SPINLOCK(connlock); 1625 1626 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1627 { 1628 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1629 return sess->sid; 1630 } 1631 1632 /* 1633 * Returns the matching session to a given sid 1634 */ 1635 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1636 { 1637 unsigned long flags; 1638 struct iscsi_cls_session *sess; 1639 1640 spin_lock_irqsave(&sesslock, flags); 1641 list_for_each_entry(sess, &sesslist, sess_list) { 1642 if (sess->sid == sid) { 1643 spin_unlock_irqrestore(&sesslock, flags); 1644 return sess; 1645 } 1646 } 1647 spin_unlock_irqrestore(&sesslock, flags); 1648 return NULL; 1649 } 1650 1651 /* 1652 * Returns the matching connection to a given sid / cid tuple 1653 */ 1654 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1655 { 1656 unsigned long flags; 1657 struct iscsi_cls_conn *conn; 1658 1659 spin_lock_irqsave(&connlock, flags); 1660 list_for_each_entry(conn, &connlist, conn_list) { 1661 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1662 spin_unlock_irqrestore(&connlock, flags); 1663 return conn; 1664 } 1665 } 1666 spin_unlock_irqrestore(&connlock, flags); 1667 return NULL; 1668 } 1669 1670 /* 1671 * The following functions can be used by LLDs that allocate 1672 * their own scsi_hosts or by software iscsi LLDs 1673 */ 1674 static struct { 1675 int value; 1676 char *name; 1677 } iscsi_session_state_names[] = { 1678 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1679 { ISCSI_SESSION_FAILED, "FAILED" }, 1680 { ISCSI_SESSION_FREE, "FREE" }, 1681 }; 1682 1683 static const char *iscsi_session_state_name(int state) 1684 { 1685 int i; 1686 char *name = NULL; 1687 1688 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1689 if (iscsi_session_state_names[i].value == state) { 1690 name = iscsi_session_state_names[i].name; 1691 break; 1692 } 1693 } 1694 return name; 1695 } 1696 1697 int iscsi_session_chkready(struct iscsi_cls_session *session) 1698 { 1699 unsigned long flags; 1700 int err; 1701 1702 spin_lock_irqsave(&session->lock, flags); 1703 switch (session->state) { 1704 case ISCSI_SESSION_LOGGED_IN: 1705 err = 0; 1706 break; 1707 case ISCSI_SESSION_FAILED: 1708 err = DID_IMM_RETRY << 16; 1709 break; 1710 case ISCSI_SESSION_FREE: 1711 err = DID_TRANSPORT_FAILFAST << 16; 1712 break; 1713 default: 1714 err = DID_NO_CONNECT << 16; 1715 break; 1716 } 1717 spin_unlock_irqrestore(&session->lock, flags); 1718 return err; 1719 } 1720 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1721 1722 int iscsi_is_session_online(struct iscsi_cls_session *session) 1723 { 1724 unsigned long flags; 1725 int ret = 0; 1726 1727 spin_lock_irqsave(&session->lock, flags); 1728 if (session->state == ISCSI_SESSION_LOGGED_IN) 1729 ret = 1; 1730 spin_unlock_irqrestore(&session->lock, flags); 1731 return ret; 1732 } 1733 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1734 1735 static void iscsi_session_release(struct device *dev) 1736 { 1737 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1738 struct Scsi_Host *shost; 1739 1740 shost = iscsi_session_to_shost(session); 1741 scsi_host_put(shost); 1742 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1743 kfree(session); 1744 } 1745 1746 int iscsi_is_session_dev(const struct device *dev) 1747 { 1748 return dev->release == iscsi_session_release; 1749 } 1750 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1751 1752 static int iscsi_iter_session_fn(struct device *dev, void *data) 1753 { 1754 void (* fn) (struct iscsi_cls_session *) = data; 1755 1756 if (!iscsi_is_session_dev(dev)) 1757 return 0; 1758 fn(iscsi_dev_to_session(dev)); 1759 return 0; 1760 } 1761 1762 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1763 void (*fn)(struct iscsi_cls_session *)) 1764 { 1765 device_for_each_child(&shost->shost_gendev, fn, 1766 iscsi_iter_session_fn); 1767 } 1768 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1769 1770 /** 1771 * iscsi_scan_finished - helper to report when running scans are done 1772 * @shost: scsi host 1773 * @time: scan run time 1774 * 1775 * This function can be used by drives like qla4xxx to report to the scsi 1776 * layer when the scans it kicked off at module load time are done. 1777 */ 1778 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) 1779 { 1780 struct iscsi_cls_host *ihost = shost->shost_data; 1781 /* 1782 * qla4xxx will have kicked off some session unblocks before calling 1783 * scsi_scan_host, so just wait for them to complete. 1784 */ 1785 return !atomic_read(&ihost->nr_scans); 1786 } 1787 EXPORT_SYMBOL_GPL(iscsi_scan_finished); 1788 1789 struct iscsi_scan_data { 1790 unsigned int channel; 1791 unsigned int id; 1792 u64 lun; 1793 enum scsi_scan_mode rescan; 1794 }; 1795 1796 static int iscsi_user_scan_session(struct device *dev, void *data) 1797 { 1798 struct iscsi_scan_data *scan_data = data; 1799 struct iscsi_cls_session *session; 1800 struct Scsi_Host *shost; 1801 struct iscsi_cls_host *ihost; 1802 unsigned long flags; 1803 unsigned int id; 1804 1805 if (!iscsi_is_session_dev(dev)) 1806 return 0; 1807 1808 session = iscsi_dev_to_session(dev); 1809 1810 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1811 1812 shost = iscsi_session_to_shost(session); 1813 ihost = shost->shost_data; 1814 1815 mutex_lock(&ihost->mutex); 1816 spin_lock_irqsave(&session->lock, flags); 1817 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1818 spin_unlock_irqrestore(&session->lock, flags); 1819 goto user_scan_exit; 1820 } 1821 id = session->target_id; 1822 spin_unlock_irqrestore(&session->lock, flags); 1823 1824 if (id != ISCSI_MAX_TARGET) { 1825 if ((scan_data->channel == SCAN_WILD_CARD || 1826 scan_data->channel == 0) && 1827 (scan_data->id == SCAN_WILD_CARD || 1828 scan_data->id == id)) 1829 scsi_scan_target(&session->dev, 0, id, 1830 scan_data->lun, scan_data->rescan); 1831 } 1832 1833 user_scan_exit: 1834 mutex_unlock(&ihost->mutex); 1835 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1836 return 0; 1837 } 1838 1839 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1840 uint id, u64 lun) 1841 { 1842 struct iscsi_scan_data scan_data; 1843 1844 scan_data.channel = channel; 1845 scan_data.id = id; 1846 scan_data.lun = lun; 1847 scan_data.rescan = SCSI_SCAN_MANUAL; 1848 1849 return device_for_each_child(&shost->shost_gendev, &scan_data, 1850 iscsi_user_scan_session); 1851 } 1852 1853 static void iscsi_scan_session(struct work_struct *work) 1854 { 1855 struct iscsi_cls_session *session = 1856 container_of(work, struct iscsi_cls_session, scan_work); 1857 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1858 struct iscsi_cls_host *ihost = shost->shost_data; 1859 struct iscsi_scan_data scan_data; 1860 1861 scan_data.channel = 0; 1862 scan_data.id = SCAN_WILD_CARD; 1863 scan_data.lun = SCAN_WILD_CARD; 1864 scan_data.rescan = SCSI_SCAN_RESCAN; 1865 1866 iscsi_user_scan_session(&session->dev, &scan_data); 1867 atomic_dec(&ihost->nr_scans); 1868 } 1869 1870 /** 1871 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1872 * @cmd: scsi cmd passed to scsi eh handler 1873 * 1874 * If the session is down this function will wait for the recovery 1875 * timer to fire or for the session to be logged back in. If the 1876 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1877 * should pass this error value to the scsi eh. 1878 */ 1879 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1880 { 1881 struct iscsi_cls_session *session = 1882 starget_to_session(scsi_target(cmd->device)); 1883 unsigned long flags; 1884 int ret = 0; 1885 1886 spin_lock_irqsave(&session->lock, flags); 1887 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1888 if (session->state == ISCSI_SESSION_FREE) { 1889 ret = FAST_IO_FAIL; 1890 break; 1891 } 1892 spin_unlock_irqrestore(&session->lock, flags); 1893 msleep(1000); 1894 spin_lock_irqsave(&session->lock, flags); 1895 } 1896 spin_unlock_irqrestore(&session->lock, flags); 1897 return ret; 1898 } 1899 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1900 1901 static void session_recovery_timedout(struct work_struct *work) 1902 { 1903 struct iscsi_cls_session *session = 1904 container_of(work, struct iscsi_cls_session, 1905 recovery_work.work); 1906 unsigned long flags; 1907 1908 iscsi_cls_session_printk(KERN_INFO, session, 1909 "session recovery timed out after %d secs\n", 1910 session->recovery_tmo); 1911 1912 spin_lock_irqsave(&session->lock, flags); 1913 switch (session->state) { 1914 case ISCSI_SESSION_FAILED: 1915 session->state = ISCSI_SESSION_FREE; 1916 break; 1917 case ISCSI_SESSION_LOGGED_IN: 1918 case ISCSI_SESSION_FREE: 1919 /* we raced with the unblock's flush */ 1920 spin_unlock_irqrestore(&session->lock, flags); 1921 return; 1922 } 1923 spin_unlock_irqrestore(&session->lock, flags); 1924 1925 if (session->transport->session_recovery_timedout) 1926 session->transport->session_recovery_timedout(session); 1927 1928 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1929 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1930 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1931 } 1932 1933 static void __iscsi_unblock_session(struct work_struct *work) 1934 { 1935 struct iscsi_cls_session *session = 1936 container_of(work, struct iscsi_cls_session, 1937 unblock_work); 1938 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1939 struct iscsi_cls_host *ihost = shost->shost_data; 1940 unsigned long flags; 1941 1942 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1943 /* 1944 * The recovery and unblock work get run from the same workqueue, 1945 * so try to cancel it if it was going to run after this unblock. 1946 */ 1947 cancel_delayed_work(&session->recovery_work); 1948 spin_lock_irqsave(&session->lock, flags); 1949 session->state = ISCSI_SESSION_LOGGED_IN; 1950 spin_unlock_irqrestore(&session->lock, flags); 1951 /* start IO */ 1952 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1953 /* 1954 * Only do kernel scanning if the driver is properly hooked into 1955 * the async scanning code (drivers like iscsi_tcp do login and 1956 * scanning from userspace). 1957 */ 1958 if (shost->hostt->scan_finished) { 1959 if (scsi_queue_work(shost, &session->scan_work)) 1960 atomic_inc(&ihost->nr_scans); 1961 } 1962 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1963 } 1964 1965 /** 1966 * iscsi_unblock_session - set a session as logged in and start IO. 1967 * @session: iscsi session 1968 * 1969 * Mark a session as ready to accept IO. 1970 */ 1971 void iscsi_unblock_session(struct iscsi_cls_session *session) 1972 { 1973 queue_work(iscsi_eh_timer_workq, &session->unblock_work); 1974 /* 1975 * make sure all the events have completed before tell the driver 1976 * it is safe 1977 */ 1978 flush_workqueue(iscsi_eh_timer_workq); 1979 } 1980 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1981 1982 static void __iscsi_block_session(struct work_struct *work) 1983 { 1984 struct iscsi_cls_session *session = 1985 container_of(work, struct iscsi_cls_session, 1986 block_work); 1987 unsigned long flags; 1988 1989 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1990 spin_lock_irqsave(&session->lock, flags); 1991 session->state = ISCSI_SESSION_FAILED; 1992 spin_unlock_irqrestore(&session->lock, flags); 1993 scsi_target_block(&session->dev); 1994 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1995 if (session->recovery_tmo >= 0) 1996 queue_delayed_work(iscsi_eh_timer_workq, 1997 &session->recovery_work, 1998 session->recovery_tmo * HZ); 1999 } 2000 2001 void iscsi_block_session(struct iscsi_cls_session *session) 2002 { 2003 queue_work(iscsi_eh_timer_workq, &session->block_work); 2004 } 2005 EXPORT_SYMBOL_GPL(iscsi_block_session); 2006 2007 static void __iscsi_unbind_session(struct work_struct *work) 2008 { 2009 struct iscsi_cls_session *session = 2010 container_of(work, struct iscsi_cls_session, 2011 unbind_work); 2012 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2013 struct iscsi_cls_host *ihost = shost->shost_data; 2014 unsigned long flags; 2015 unsigned int target_id; 2016 2017 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 2018 2019 /* Prevent new scans and make sure scanning is not in progress */ 2020 mutex_lock(&ihost->mutex); 2021 spin_lock_irqsave(&session->lock, flags); 2022 if (session->target_id == ISCSI_MAX_TARGET) { 2023 spin_unlock_irqrestore(&session->lock, flags); 2024 mutex_unlock(&ihost->mutex); 2025 return; 2026 } 2027 2028 target_id = session->target_id; 2029 session->target_id = ISCSI_MAX_TARGET; 2030 spin_unlock_irqrestore(&session->lock, flags); 2031 mutex_unlock(&ihost->mutex); 2032 2033 if (session->ida_used) 2034 ida_simple_remove(&iscsi_sess_ida, target_id); 2035 2036 scsi_remove_target(&session->dev); 2037 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2038 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2039 } 2040 2041 static void __iscsi_destroy_session(struct work_struct *work) 2042 { 2043 struct iscsi_cls_session *session = 2044 container_of(work, struct iscsi_cls_session, destroy_work); 2045 2046 session->transport->destroy_session(session); 2047 } 2048 2049 struct iscsi_cls_session * 2050 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2051 int dd_size) 2052 { 2053 struct iscsi_cls_session *session; 2054 2055 session = kzalloc(sizeof(*session) + dd_size, 2056 GFP_KERNEL); 2057 if (!session) 2058 return NULL; 2059 2060 session->transport = transport; 2061 session->creator = -1; 2062 session->recovery_tmo = 120; 2063 session->recovery_tmo_sysfs_override = false; 2064 session->state = ISCSI_SESSION_FREE; 2065 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2066 INIT_LIST_HEAD(&session->sess_list); 2067 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2068 INIT_WORK(&session->block_work, __iscsi_block_session); 2069 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2070 INIT_WORK(&session->scan_work, iscsi_scan_session); 2071 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2072 spin_lock_init(&session->lock); 2073 2074 /* this is released in the dev's release function */ 2075 scsi_host_get(shost); 2076 session->dev.parent = &shost->shost_gendev; 2077 session->dev.release = iscsi_session_release; 2078 device_initialize(&session->dev); 2079 if (dd_size) 2080 session->dd_data = &session[1]; 2081 2082 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2083 return session; 2084 } 2085 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2086 2087 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2088 { 2089 unsigned long flags; 2090 int id = 0; 2091 int err; 2092 2093 session->sid = atomic_add_return(1, &iscsi_session_nr); 2094 2095 if (target_id == ISCSI_MAX_TARGET) { 2096 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); 2097 2098 if (id < 0) { 2099 iscsi_cls_session_printk(KERN_ERR, session, 2100 "Failure in Target ID Allocation\n"); 2101 return id; 2102 } 2103 session->target_id = (unsigned int)id; 2104 session->ida_used = true; 2105 } else 2106 session->target_id = target_id; 2107 2108 dev_set_name(&session->dev, "session%u", session->sid); 2109 err = device_add(&session->dev); 2110 if (err) { 2111 iscsi_cls_session_printk(KERN_ERR, session, 2112 "could not register session's dev\n"); 2113 goto release_ida; 2114 } 2115 err = transport_register_device(&session->dev); 2116 if (err) { 2117 iscsi_cls_session_printk(KERN_ERR, session, 2118 "could not register transport's dev\n"); 2119 goto release_dev; 2120 } 2121 2122 spin_lock_irqsave(&sesslock, flags); 2123 list_add(&session->sess_list, &sesslist); 2124 spin_unlock_irqrestore(&sesslock, flags); 2125 2126 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2127 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2128 return 0; 2129 2130 release_dev: 2131 device_del(&session->dev); 2132 release_ida: 2133 if (session->ida_used) 2134 ida_simple_remove(&iscsi_sess_ida, session->target_id); 2135 2136 return err; 2137 } 2138 EXPORT_SYMBOL_GPL(iscsi_add_session); 2139 2140 /** 2141 * iscsi_create_session - create iscsi class session 2142 * @shost: scsi host 2143 * @transport: iscsi transport 2144 * @dd_size: private driver data size 2145 * @target_id: which target 2146 * 2147 * This can be called from a LLD or iscsi_transport. 2148 */ 2149 struct iscsi_cls_session * 2150 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2151 int dd_size, unsigned int target_id) 2152 { 2153 struct iscsi_cls_session *session; 2154 2155 session = iscsi_alloc_session(shost, transport, dd_size); 2156 if (!session) 2157 return NULL; 2158 2159 if (iscsi_add_session(session, target_id)) { 2160 iscsi_free_session(session); 2161 return NULL; 2162 } 2163 return session; 2164 } 2165 EXPORT_SYMBOL_GPL(iscsi_create_session); 2166 2167 static void iscsi_conn_release(struct device *dev) 2168 { 2169 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2170 struct device *parent = conn->dev.parent; 2171 2172 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2173 kfree(conn); 2174 put_device(parent); 2175 } 2176 2177 static int iscsi_is_conn_dev(const struct device *dev) 2178 { 2179 return dev->release == iscsi_conn_release; 2180 } 2181 2182 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2183 { 2184 if (!iscsi_is_conn_dev(dev)) 2185 return 0; 2186 return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); 2187 } 2188 2189 void iscsi_remove_session(struct iscsi_cls_session *session) 2190 { 2191 unsigned long flags; 2192 int err; 2193 2194 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2195 2196 spin_lock_irqsave(&sesslock, flags); 2197 list_del(&session->sess_list); 2198 spin_unlock_irqrestore(&sesslock, flags); 2199 2200 /* make sure there are no blocks/unblocks queued */ 2201 flush_workqueue(iscsi_eh_timer_workq); 2202 /* make sure the timedout callout is not running */ 2203 if (!cancel_delayed_work(&session->recovery_work)) 2204 flush_workqueue(iscsi_eh_timer_workq); 2205 /* 2206 * If we are blocked let commands flow again. The lld or iscsi 2207 * layer should set up the queuecommand to fail commands. 2208 * We assume that LLD will not be calling block/unblock while 2209 * removing the session. 2210 */ 2211 spin_lock_irqsave(&session->lock, flags); 2212 session->state = ISCSI_SESSION_FREE; 2213 spin_unlock_irqrestore(&session->lock, flags); 2214 2215 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2216 /* flush running scans then delete devices */ 2217 flush_work(&session->scan_work); 2218 /* flush running unbind operations */ 2219 flush_work(&session->unbind_work); 2220 __iscsi_unbind_session(&session->unbind_work); 2221 2222 /* hw iscsi may not have removed all connections from session */ 2223 err = device_for_each_child(&session->dev, NULL, 2224 iscsi_iter_destroy_conn_fn); 2225 if (err) 2226 iscsi_cls_session_printk(KERN_ERR, session, 2227 "Could not delete all connections " 2228 "for session. Error %d.\n", err); 2229 2230 transport_unregister_device(&session->dev); 2231 2232 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2233 device_del(&session->dev); 2234 } 2235 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2236 2237 void iscsi_free_session(struct iscsi_cls_session *session) 2238 { 2239 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2240 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2241 put_device(&session->dev); 2242 } 2243 EXPORT_SYMBOL_GPL(iscsi_free_session); 2244 2245 /** 2246 * iscsi_create_conn - create iscsi class connection 2247 * @session: iscsi cls session 2248 * @dd_size: private driver data size 2249 * @cid: connection id 2250 * 2251 * This can be called from a LLD or iscsi_transport. The connection 2252 * is child of the session so cid must be unique for all connections 2253 * on the session. 2254 * 2255 * Since we do not support MCS, cid will normally be zero. In some cases 2256 * for software iscsi we could be trying to preallocate a connection struct 2257 * in which case there could be two connection structs and cid would be 2258 * non-zero. 2259 */ 2260 struct iscsi_cls_conn * 2261 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2262 { 2263 struct iscsi_transport *transport = session->transport; 2264 struct iscsi_cls_conn *conn; 2265 unsigned long flags; 2266 int err; 2267 2268 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2269 if (!conn) 2270 return NULL; 2271 if (dd_size) 2272 conn->dd_data = &conn[1]; 2273 2274 mutex_init(&conn->ep_mutex); 2275 INIT_LIST_HEAD(&conn->conn_list); 2276 INIT_LIST_HEAD(&conn->conn_list_err); 2277 conn->transport = transport; 2278 conn->cid = cid; 2279 conn->state = ISCSI_CONN_DOWN; 2280 2281 /* this is released in the dev's release function */ 2282 if (!get_device(&session->dev)) 2283 goto free_conn; 2284 2285 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2286 conn->dev.parent = &session->dev; 2287 conn->dev.release = iscsi_conn_release; 2288 err = device_register(&conn->dev); 2289 if (err) { 2290 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2291 "register connection's dev\n"); 2292 goto release_parent_ref; 2293 } 2294 err = transport_register_device(&conn->dev); 2295 if (err) { 2296 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2297 "register transport's dev\n"); 2298 goto release_conn_ref; 2299 } 2300 2301 spin_lock_irqsave(&connlock, flags); 2302 list_add(&conn->conn_list, &connlist); 2303 spin_unlock_irqrestore(&connlock, flags); 2304 2305 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); 2306 return conn; 2307 2308 release_conn_ref: 2309 put_device(&conn->dev); 2310 release_parent_ref: 2311 put_device(&session->dev); 2312 free_conn: 2313 kfree(conn); 2314 return NULL; 2315 } 2316 2317 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2318 2319 /** 2320 * iscsi_destroy_conn - destroy iscsi class connection 2321 * @conn: iscsi cls session 2322 * 2323 * This can be called from a LLD or iscsi_transport. 2324 */ 2325 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2326 { 2327 unsigned long flags; 2328 2329 spin_lock_irqsave(&connlock, flags); 2330 list_del(&conn->conn_list); 2331 list_del(&conn->conn_list_err); 2332 spin_unlock_irqrestore(&connlock, flags); 2333 2334 transport_unregister_device(&conn->dev); 2335 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2336 device_unregister(&conn->dev); 2337 return 0; 2338 } 2339 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2340 2341 /* 2342 * iscsi interface functions 2343 */ 2344 static struct iscsi_internal * 2345 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2346 { 2347 struct iscsi_internal *priv; 2348 unsigned long flags; 2349 2350 spin_lock_irqsave(&iscsi_transport_lock, flags); 2351 list_for_each_entry(priv, &iscsi_transports, list) { 2352 if (tt == priv->iscsi_transport) { 2353 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2354 return priv; 2355 } 2356 } 2357 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2358 return NULL; 2359 } 2360 2361 static int 2362 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2363 { 2364 return nlmsg_multicast(nls, skb, 0, group, gfp); 2365 } 2366 2367 static int 2368 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2369 { 2370 return nlmsg_unicast(nls, skb, portid); 2371 } 2372 2373 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2374 char *data, uint32_t data_size) 2375 { 2376 struct nlmsghdr *nlh; 2377 struct sk_buff *skb; 2378 struct iscsi_uevent *ev; 2379 char *pdu; 2380 struct iscsi_internal *priv; 2381 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2382 data_size); 2383 2384 priv = iscsi_if_transport_lookup(conn->transport); 2385 if (!priv) 2386 return -EINVAL; 2387 2388 skb = alloc_skb(len, GFP_ATOMIC); 2389 if (!skb) { 2390 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2391 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2392 "control PDU: OOM\n"); 2393 return -ENOMEM; 2394 } 2395 2396 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2397 ev = nlmsg_data(nlh); 2398 memset(ev, 0, sizeof(*ev)); 2399 ev->transport_handle = iscsi_handle(conn->transport); 2400 ev->type = ISCSI_KEVENT_RECV_PDU; 2401 ev->r.recv_req.cid = conn->cid; 2402 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2403 pdu = (char*)ev + sizeof(*ev); 2404 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2405 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2406 2407 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2408 } 2409 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2410 2411 int iscsi_offload_mesg(struct Scsi_Host *shost, 2412 struct iscsi_transport *transport, uint32_t type, 2413 char *data, uint16_t data_size) 2414 { 2415 struct nlmsghdr *nlh; 2416 struct sk_buff *skb; 2417 struct iscsi_uevent *ev; 2418 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2419 2420 skb = alloc_skb(len, GFP_ATOMIC); 2421 if (!skb) { 2422 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2423 return -ENOMEM; 2424 } 2425 2426 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2427 ev = nlmsg_data(nlh); 2428 memset(ev, 0, sizeof(*ev)); 2429 ev->type = type; 2430 ev->transport_handle = iscsi_handle(transport); 2431 switch (type) { 2432 case ISCSI_KEVENT_PATH_REQ: 2433 ev->r.req_path.host_no = shost->host_no; 2434 break; 2435 case ISCSI_KEVENT_IF_DOWN: 2436 ev->r.notify_if_down.host_no = shost->host_no; 2437 break; 2438 } 2439 2440 memcpy((char *)ev + sizeof(*ev), data, data_size); 2441 2442 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2443 } 2444 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2445 2446 static void stop_conn_work_fn(struct work_struct *work) 2447 { 2448 struct iscsi_cls_conn *conn, *tmp; 2449 unsigned long flags; 2450 LIST_HEAD(recovery_list); 2451 2452 spin_lock_irqsave(&connlock, flags); 2453 if (list_empty(&connlist_err)) { 2454 spin_unlock_irqrestore(&connlock, flags); 2455 return; 2456 } 2457 list_splice_init(&connlist_err, &recovery_list); 2458 spin_unlock_irqrestore(&connlock, flags); 2459 2460 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) { 2461 uint32_t sid = iscsi_conn_get_sid(conn); 2462 struct iscsi_cls_session *session; 2463 2464 mutex_lock(&rx_queue_mutex); 2465 2466 session = iscsi_session_lookup(sid); 2467 if (session) { 2468 if (system_state != SYSTEM_RUNNING) { 2469 session->recovery_tmo = 0; 2470 conn->transport->stop_conn(conn, 2471 STOP_CONN_TERM); 2472 } else { 2473 conn->transport->stop_conn(conn, 2474 STOP_CONN_RECOVER); 2475 } 2476 } 2477 2478 list_del_init(&conn->conn_list_err); 2479 2480 mutex_unlock(&rx_queue_mutex); 2481 2482 /* we don't want to hold rx_queue_mutex for too long, 2483 * for instance if many conns failed at the same time, 2484 * since this stall other iscsi maintenance operations. 2485 * Give other users a chance to proceed. 2486 */ 2487 cond_resched(); 2488 } 2489 } 2490 2491 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2492 { 2493 struct nlmsghdr *nlh; 2494 struct sk_buff *skb; 2495 struct iscsi_uevent *ev; 2496 struct iscsi_internal *priv; 2497 int len = nlmsg_total_size(sizeof(*ev)); 2498 unsigned long flags; 2499 2500 spin_lock_irqsave(&connlock, flags); 2501 list_add(&conn->conn_list_err, &connlist_err); 2502 spin_unlock_irqrestore(&connlock, flags); 2503 queue_work(system_unbound_wq, &stop_conn_work); 2504 2505 priv = iscsi_if_transport_lookup(conn->transport); 2506 if (!priv) 2507 return; 2508 2509 skb = alloc_skb(len, GFP_ATOMIC); 2510 if (!skb) { 2511 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2512 "conn error (%d)\n", error); 2513 return; 2514 } 2515 2516 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2517 ev = nlmsg_data(nlh); 2518 ev->transport_handle = iscsi_handle(conn->transport); 2519 ev->type = ISCSI_KEVENT_CONN_ERROR; 2520 ev->r.connerror.error = error; 2521 ev->r.connerror.cid = conn->cid; 2522 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2523 2524 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2525 2526 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2527 error); 2528 } 2529 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2530 2531 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2532 enum iscsi_conn_state state) 2533 { 2534 struct nlmsghdr *nlh; 2535 struct sk_buff *skb; 2536 struct iscsi_uevent *ev; 2537 struct iscsi_internal *priv; 2538 int len = nlmsg_total_size(sizeof(*ev)); 2539 2540 priv = iscsi_if_transport_lookup(conn->transport); 2541 if (!priv) 2542 return; 2543 2544 skb = alloc_skb(len, GFP_ATOMIC); 2545 if (!skb) { 2546 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2547 "conn login (%d)\n", state); 2548 return; 2549 } 2550 2551 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2552 ev = nlmsg_data(nlh); 2553 ev->transport_handle = iscsi_handle(conn->transport); 2554 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2555 ev->r.conn_login.state = state; 2556 ev->r.conn_login.cid = conn->cid; 2557 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2558 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2559 2560 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2561 state); 2562 } 2563 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2564 2565 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2566 enum iscsi_host_event_code code, uint32_t data_size, 2567 uint8_t *data) 2568 { 2569 struct nlmsghdr *nlh; 2570 struct sk_buff *skb; 2571 struct iscsi_uevent *ev; 2572 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2573 2574 skb = alloc_skb(len, GFP_NOIO); 2575 if (!skb) { 2576 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2577 host_no, code); 2578 return; 2579 } 2580 2581 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2582 ev = nlmsg_data(nlh); 2583 ev->transport_handle = iscsi_handle(transport); 2584 ev->type = ISCSI_KEVENT_HOST_EVENT; 2585 ev->r.host_event.host_no = host_no; 2586 ev->r.host_event.code = code; 2587 ev->r.host_event.data_size = data_size; 2588 2589 if (data_size) 2590 memcpy((char *)ev + sizeof(*ev), data, data_size); 2591 2592 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2593 } 2594 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2595 2596 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2597 uint32_t status, uint32_t pid, uint32_t data_size, 2598 uint8_t *data) 2599 { 2600 struct nlmsghdr *nlh; 2601 struct sk_buff *skb; 2602 struct iscsi_uevent *ev; 2603 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2604 2605 skb = alloc_skb(len, GFP_NOIO); 2606 if (!skb) { 2607 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2608 return; 2609 } 2610 2611 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2612 ev = nlmsg_data(nlh); 2613 ev->transport_handle = iscsi_handle(transport); 2614 ev->type = ISCSI_KEVENT_PING_COMP; 2615 ev->r.ping_comp.host_no = host_no; 2616 ev->r.ping_comp.status = status; 2617 ev->r.ping_comp.pid = pid; 2618 ev->r.ping_comp.data_size = data_size; 2619 memcpy((char *)ev + sizeof(*ev), data, data_size); 2620 2621 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2622 } 2623 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2624 2625 static int 2626 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2627 { 2628 struct sk_buff *skb; 2629 struct nlmsghdr *nlh; 2630 int len = nlmsg_total_size(size); 2631 2632 skb = alloc_skb(len, GFP_ATOMIC); 2633 if (!skb) { 2634 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2635 return -ENOMEM; 2636 } 2637 2638 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2639 memcpy(nlmsg_data(nlh), payload, size); 2640 return iscsi_unicast_skb(skb, portid); 2641 } 2642 2643 static int 2644 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2645 { 2646 struct iscsi_uevent *ev = nlmsg_data(nlh); 2647 struct iscsi_stats *stats; 2648 struct sk_buff *skbstat; 2649 struct iscsi_cls_conn *conn; 2650 struct nlmsghdr *nlhstat; 2651 struct iscsi_uevent *evstat; 2652 struct iscsi_internal *priv; 2653 int len = nlmsg_total_size(sizeof(*ev) + 2654 sizeof(struct iscsi_stats) + 2655 sizeof(struct iscsi_stats_custom) * 2656 ISCSI_STATS_CUSTOM_MAX); 2657 int err = 0; 2658 2659 priv = iscsi_if_transport_lookup(transport); 2660 if (!priv) 2661 return -EINVAL; 2662 2663 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2664 if (!conn) 2665 return -EEXIST; 2666 2667 do { 2668 int actual_size; 2669 2670 skbstat = alloc_skb(len, GFP_ATOMIC); 2671 if (!skbstat) { 2672 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2673 "deliver stats: OOM\n"); 2674 return -ENOMEM; 2675 } 2676 2677 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2678 (len - sizeof(*nlhstat)), 0); 2679 evstat = nlmsg_data(nlhstat); 2680 memset(evstat, 0, sizeof(*evstat)); 2681 evstat->transport_handle = iscsi_handle(conn->transport); 2682 evstat->type = nlh->nlmsg_type; 2683 evstat->u.get_stats.cid = 2684 ev->u.get_stats.cid; 2685 evstat->u.get_stats.sid = 2686 ev->u.get_stats.sid; 2687 stats = (struct iscsi_stats *) 2688 ((char*)evstat + sizeof(*evstat)); 2689 memset(stats, 0, sizeof(*stats)); 2690 2691 transport->get_stats(conn, stats); 2692 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2693 sizeof(struct iscsi_stats) + 2694 sizeof(struct iscsi_stats_custom) * 2695 stats->custom_length); 2696 actual_size -= sizeof(*nlhstat); 2697 actual_size = nlmsg_msg_size(actual_size); 2698 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2699 nlhstat->nlmsg_len = actual_size; 2700 2701 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2702 GFP_ATOMIC); 2703 } while (err < 0 && err != -ECONNREFUSED); 2704 2705 return err; 2706 } 2707 2708 /** 2709 * iscsi_session_event - send session destr. completion event 2710 * @session: iscsi class session 2711 * @event: type of event 2712 */ 2713 int iscsi_session_event(struct iscsi_cls_session *session, 2714 enum iscsi_uevent_e event) 2715 { 2716 struct iscsi_internal *priv; 2717 struct Scsi_Host *shost; 2718 struct iscsi_uevent *ev; 2719 struct sk_buff *skb; 2720 struct nlmsghdr *nlh; 2721 int rc, len = nlmsg_total_size(sizeof(*ev)); 2722 2723 priv = iscsi_if_transport_lookup(session->transport); 2724 if (!priv) 2725 return -EINVAL; 2726 shost = iscsi_session_to_shost(session); 2727 2728 skb = alloc_skb(len, GFP_KERNEL); 2729 if (!skb) { 2730 iscsi_cls_session_printk(KERN_ERR, session, 2731 "Cannot notify userspace of session " 2732 "event %u\n", event); 2733 return -ENOMEM; 2734 } 2735 2736 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2737 ev = nlmsg_data(nlh); 2738 ev->transport_handle = iscsi_handle(session->transport); 2739 2740 ev->type = event; 2741 switch (event) { 2742 case ISCSI_KEVENT_DESTROY_SESSION: 2743 ev->r.d_session.host_no = shost->host_no; 2744 ev->r.d_session.sid = session->sid; 2745 break; 2746 case ISCSI_KEVENT_CREATE_SESSION: 2747 ev->r.c_session_ret.host_no = shost->host_no; 2748 ev->r.c_session_ret.sid = session->sid; 2749 break; 2750 case ISCSI_KEVENT_UNBIND_SESSION: 2751 ev->r.unbind_session.host_no = shost->host_no; 2752 ev->r.unbind_session.sid = session->sid; 2753 break; 2754 default: 2755 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2756 "%u.\n", event); 2757 kfree_skb(skb); 2758 return -EINVAL; 2759 } 2760 2761 /* 2762 * this will occur if the daemon is not up, so we just warn 2763 * the user and when the daemon is restarted it will handle it 2764 */ 2765 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2766 if (rc == -ESRCH) 2767 iscsi_cls_session_printk(KERN_ERR, session, 2768 "Cannot notify userspace of session " 2769 "event %u. Check iscsi daemon\n", 2770 event); 2771 2772 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2773 event, rc); 2774 return rc; 2775 } 2776 EXPORT_SYMBOL_GPL(iscsi_session_event); 2777 2778 static int 2779 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2780 struct iscsi_uevent *ev, pid_t pid, 2781 uint32_t initial_cmdsn, uint16_t cmds_max, 2782 uint16_t queue_depth) 2783 { 2784 struct iscsi_transport *transport = priv->iscsi_transport; 2785 struct iscsi_cls_session *session; 2786 struct Scsi_Host *shost; 2787 2788 session = transport->create_session(ep, cmds_max, queue_depth, 2789 initial_cmdsn); 2790 if (!session) 2791 return -ENOMEM; 2792 2793 session->creator = pid; 2794 shost = iscsi_session_to_shost(session); 2795 ev->r.c_session_ret.host_no = shost->host_no; 2796 ev->r.c_session_ret.sid = session->sid; 2797 ISCSI_DBG_TRANS_SESSION(session, 2798 "Completed creating transport session\n"); 2799 return 0; 2800 } 2801 2802 static int 2803 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2804 { 2805 struct iscsi_cls_conn *conn; 2806 struct iscsi_cls_session *session; 2807 2808 session = iscsi_session_lookup(ev->u.c_conn.sid); 2809 if (!session) { 2810 printk(KERN_ERR "iscsi: invalid session %d.\n", 2811 ev->u.c_conn.sid); 2812 return -EINVAL; 2813 } 2814 2815 conn = transport->create_conn(session, ev->u.c_conn.cid); 2816 if (!conn) { 2817 iscsi_cls_session_printk(KERN_ERR, session, 2818 "couldn't create a new connection."); 2819 return -ENOMEM; 2820 } 2821 2822 ev->r.c_conn_ret.sid = session->sid; 2823 ev->r.c_conn_ret.cid = conn->cid; 2824 2825 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2826 return 0; 2827 } 2828 2829 static int 2830 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2831 { 2832 struct iscsi_cls_conn *conn; 2833 unsigned long flags; 2834 2835 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2836 if (!conn) 2837 return -EINVAL; 2838 2839 spin_lock_irqsave(&connlock, flags); 2840 if (!list_empty(&conn->conn_list_err)) { 2841 spin_unlock_irqrestore(&connlock, flags); 2842 return -EAGAIN; 2843 } 2844 spin_unlock_irqrestore(&connlock, flags); 2845 2846 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2847 if (transport->destroy_conn) 2848 transport->destroy_conn(conn); 2849 2850 return 0; 2851 } 2852 2853 static int 2854 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2855 { 2856 char *data = (char*)ev + sizeof(*ev); 2857 struct iscsi_cls_conn *conn; 2858 struct iscsi_cls_session *session; 2859 int err = 0, value = 0; 2860 2861 session = iscsi_session_lookup(ev->u.set_param.sid); 2862 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2863 if (!conn || !session) 2864 return -EINVAL; 2865 2866 switch (ev->u.set_param.param) { 2867 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2868 sscanf(data, "%d", &value); 2869 if (!session->recovery_tmo_sysfs_override) 2870 session->recovery_tmo = value; 2871 break; 2872 default: 2873 err = transport->set_param(conn, ev->u.set_param.param, 2874 data, ev->u.set_param.len); 2875 } 2876 2877 return err; 2878 } 2879 2880 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2881 struct iscsi_uevent *ev, int msg_type) 2882 { 2883 struct iscsi_endpoint *ep; 2884 struct sockaddr *dst_addr; 2885 struct Scsi_Host *shost = NULL; 2886 int non_blocking, err = 0; 2887 2888 if (!transport->ep_connect) 2889 return -EINVAL; 2890 2891 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2892 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2893 if (!shost) { 2894 printk(KERN_ERR "ep connect failed. Could not find " 2895 "host no %u\n", 2896 ev->u.ep_connect_through_host.host_no); 2897 return -ENODEV; 2898 } 2899 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2900 } else 2901 non_blocking = ev->u.ep_connect.non_blocking; 2902 2903 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2904 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2905 if (IS_ERR(ep)) { 2906 err = PTR_ERR(ep); 2907 goto release_host; 2908 } 2909 2910 ev->r.ep_connect_ret.handle = ep->id; 2911 release_host: 2912 if (shost) 2913 scsi_host_put(shost); 2914 return err; 2915 } 2916 2917 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2918 u64 ep_handle) 2919 { 2920 struct iscsi_cls_conn *conn; 2921 struct iscsi_endpoint *ep; 2922 2923 if (!transport->ep_disconnect) 2924 return -EINVAL; 2925 2926 ep = iscsi_lookup_endpoint(ep_handle); 2927 if (!ep) 2928 return -EINVAL; 2929 conn = ep->conn; 2930 if (conn) { 2931 mutex_lock(&conn->ep_mutex); 2932 conn->ep = NULL; 2933 mutex_unlock(&conn->ep_mutex); 2934 } 2935 2936 transport->ep_disconnect(ep); 2937 return 0; 2938 } 2939 2940 static int 2941 iscsi_if_transport_ep(struct iscsi_transport *transport, 2942 struct iscsi_uevent *ev, int msg_type) 2943 { 2944 struct iscsi_endpoint *ep; 2945 int rc = 0; 2946 2947 switch (msg_type) { 2948 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2949 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2950 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2951 break; 2952 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2953 if (!transport->ep_poll) 2954 return -EINVAL; 2955 2956 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2957 if (!ep) 2958 return -EINVAL; 2959 2960 ev->r.retcode = transport->ep_poll(ep, 2961 ev->u.ep_poll.timeout_ms); 2962 break; 2963 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 2964 rc = iscsi_if_ep_disconnect(transport, 2965 ev->u.ep_disconnect.ep_handle); 2966 break; 2967 } 2968 return rc; 2969 } 2970 2971 static int 2972 iscsi_tgt_dscvr(struct iscsi_transport *transport, 2973 struct iscsi_uevent *ev) 2974 { 2975 struct Scsi_Host *shost; 2976 struct sockaddr *dst_addr; 2977 int err; 2978 2979 if (!transport->tgt_dscvr) 2980 return -EINVAL; 2981 2982 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 2983 if (!shost) { 2984 printk(KERN_ERR "target discovery could not find host no %u\n", 2985 ev->u.tgt_dscvr.host_no); 2986 return -ENODEV; 2987 } 2988 2989 2990 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2991 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 2992 ev->u.tgt_dscvr.enable, dst_addr); 2993 scsi_host_put(shost); 2994 return err; 2995 } 2996 2997 static int 2998 iscsi_set_host_param(struct iscsi_transport *transport, 2999 struct iscsi_uevent *ev) 3000 { 3001 char *data = (char*)ev + sizeof(*ev); 3002 struct Scsi_Host *shost; 3003 int err; 3004 3005 if (!transport->set_host_param) 3006 return -ENOSYS; 3007 3008 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3009 if (!shost) { 3010 printk(KERN_ERR "set_host_param could not find host no %u\n", 3011 ev->u.set_host_param.host_no); 3012 return -ENODEV; 3013 } 3014 3015 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3016 data, ev->u.set_host_param.len); 3017 scsi_host_put(shost); 3018 return err; 3019 } 3020 3021 static int 3022 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3023 { 3024 struct Scsi_Host *shost; 3025 struct iscsi_path *params; 3026 int err; 3027 3028 if (!transport->set_path) 3029 return -ENOSYS; 3030 3031 shost = scsi_host_lookup(ev->u.set_path.host_no); 3032 if (!shost) { 3033 printk(KERN_ERR "set path could not find host no %u\n", 3034 ev->u.set_path.host_no); 3035 return -ENODEV; 3036 } 3037 3038 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3039 err = transport->set_path(shost, params); 3040 3041 scsi_host_put(shost); 3042 return err; 3043 } 3044 3045 static int iscsi_session_has_conns(int sid) 3046 { 3047 struct iscsi_cls_conn *conn; 3048 unsigned long flags; 3049 int found = 0; 3050 3051 spin_lock_irqsave(&connlock, flags); 3052 list_for_each_entry(conn, &connlist, conn_list) { 3053 if (iscsi_conn_get_sid(conn) == sid) { 3054 found = 1; 3055 break; 3056 } 3057 } 3058 spin_unlock_irqrestore(&connlock, flags); 3059 3060 return found; 3061 } 3062 3063 static int 3064 iscsi_set_iface_params(struct iscsi_transport *transport, 3065 struct iscsi_uevent *ev, uint32_t len) 3066 { 3067 char *data = (char *)ev + sizeof(*ev); 3068 struct Scsi_Host *shost; 3069 int err; 3070 3071 if (!transport->set_iface_param) 3072 return -ENOSYS; 3073 3074 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3075 if (!shost) { 3076 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3077 ev->u.set_iface_params.host_no); 3078 return -ENODEV; 3079 } 3080 3081 err = transport->set_iface_param(shost, data, len); 3082 scsi_host_put(shost); 3083 return err; 3084 } 3085 3086 static int 3087 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3088 { 3089 struct Scsi_Host *shost; 3090 struct sockaddr *dst_addr; 3091 int err; 3092 3093 if (!transport->send_ping) 3094 return -ENOSYS; 3095 3096 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3097 if (!shost) { 3098 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3099 ev->u.iscsi_ping.host_no); 3100 return -ENODEV; 3101 } 3102 3103 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3104 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3105 ev->u.iscsi_ping.iface_type, 3106 ev->u.iscsi_ping.payload_size, 3107 ev->u.iscsi_ping.pid, 3108 dst_addr); 3109 scsi_host_put(shost); 3110 return err; 3111 } 3112 3113 static int 3114 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3115 { 3116 struct iscsi_uevent *ev = nlmsg_data(nlh); 3117 struct Scsi_Host *shost = NULL; 3118 struct iscsi_chap_rec *chap_rec; 3119 struct iscsi_internal *priv; 3120 struct sk_buff *skbchap; 3121 struct nlmsghdr *nlhchap; 3122 struct iscsi_uevent *evchap; 3123 uint32_t chap_buf_size; 3124 int len, err = 0; 3125 char *buf; 3126 3127 if (!transport->get_chap) 3128 return -EINVAL; 3129 3130 priv = iscsi_if_transport_lookup(transport); 3131 if (!priv) 3132 return -EINVAL; 3133 3134 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3135 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3136 3137 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3138 if (!shost) { 3139 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3140 __func__, ev->u.get_chap.host_no); 3141 return -ENODEV; 3142 } 3143 3144 do { 3145 int actual_size; 3146 3147 skbchap = alloc_skb(len, GFP_KERNEL); 3148 if (!skbchap) { 3149 printk(KERN_ERR "can not deliver chap: OOM\n"); 3150 err = -ENOMEM; 3151 goto exit_get_chap; 3152 } 3153 3154 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3155 (len - sizeof(*nlhchap)), 0); 3156 evchap = nlmsg_data(nlhchap); 3157 memset(evchap, 0, sizeof(*evchap)); 3158 evchap->transport_handle = iscsi_handle(transport); 3159 evchap->type = nlh->nlmsg_type; 3160 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3161 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3162 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3163 buf = (char *)evchap + sizeof(*evchap); 3164 memset(buf, 0, chap_buf_size); 3165 3166 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3167 &evchap->u.get_chap.num_entries, buf); 3168 3169 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3170 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3171 nlhchap->nlmsg_len = actual_size; 3172 3173 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3174 GFP_KERNEL); 3175 } while (err < 0 && err != -ECONNREFUSED); 3176 3177 exit_get_chap: 3178 scsi_host_put(shost); 3179 return err; 3180 } 3181 3182 static int iscsi_set_chap(struct iscsi_transport *transport, 3183 struct iscsi_uevent *ev, uint32_t len) 3184 { 3185 char *data = (char *)ev + sizeof(*ev); 3186 struct Scsi_Host *shost; 3187 int err = 0; 3188 3189 if (!transport->set_chap) 3190 return -ENOSYS; 3191 3192 shost = scsi_host_lookup(ev->u.set_path.host_no); 3193 if (!shost) { 3194 pr_err("%s could not find host no %u\n", 3195 __func__, ev->u.set_path.host_no); 3196 return -ENODEV; 3197 } 3198 3199 err = transport->set_chap(shost, data, len); 3200 scsi_host_put(shost); 3201 return err; 3202 } 3203 3204 static int iscsi_delete_chap(struct iscsi_transport *transport, 3205 struct iscsi_uevent *ev) 3206 { 3207 struct Scsi_Host *shost; 3208 int err = 0; 3209 3210 if (!transport->delete_chap) 3211 return -ENOSYS; 3212 3213 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3214 if (!shost) { 3215 printk(KERN_ERR "%s could not find host no %u\n", 3216 __func__, ev->u.delete_chap.host_no); 3217 return -ENODEV; 3218 } 3219 3220 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3221 scsi_host_put(shost); 3222 return err; 3223 } 3224 3225 static const struct { 3226 enum iscsi_discovery_parent_type value; 3227 char *name; 3228 } iscsi_discovery_parent_names[] = { 3229 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3230 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3231 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3232 }; 3233 3234 char *iscsi_get_discovery_parent_name(int parent_type) 3235 { 3236 int i; 3237 char *state = "Unknown!"; 3238 3239 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3240 if (iscsi_discovery_parent_names[i].value & parent_type) { 3241 state = iscsi_discovery_parent_names[i].name; 3242 break; 3243 } 3244 } 3245 return state; 3246 } 3247 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3248 3249 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3250 struct iscsi_uevent *ev, uint32_t len) 3251 { 3252 char *data = (char *)ev + sizeof(*ev); 3253 struct Scsi_Host *shost; 3254 struct iscsi_bus_flash_session *fnode_sess; 3255 struct iscsi_bus_flash_conn *fnode_conn; 3256 struct device *dev; 3257 uint32_t idx; 3258 int err = 0; 3259 3260 if (!transport->set_flashnode_param) { 3261 err = -ENOSYS; 3262 goto exit_set_fnode; 3263 } 3264 3265 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3266 if (!shost) { 3267 pr_err("%s could not find host no %u\n", 3268 __func__, ev->u.set_flashnode.host_no); 3269 err = -ENODEV; 3270 goto put_host; 3271 } 3272 3273 idx = ev->u.set_flashnode.flashnode_idx; 3274 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3275 if (!fnode_sess) { 3276 pr_err("%s could not find flashnode %u for host no %u\n", 3277 __func__, idx, ev->u.set_flashnode.host_no); 3278 err = -ENODEV; 3279 goto put_host; 3280 } 3281 3282 dev = iscsi_find_flashnode_conn(fnode_sess); 3283 if (!dev) { 3284 err = -ENODEV; 3285 goto put_sess; 3286 } 3287 3288 fnode_conn = iscsi_dev_to_flash_conn(dev); 3289 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3290 put_device(dev); 3291 3292 put_sess: 3293 put_device(&fnode_sess->dev); 3294 3295 put_host: 3296 scsi_host_put(shost); 3297 3298 exit_set_fnode: 3299 return err; 3300 } 3301 3302 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3303 struct iscsi_uevent *ev, uint32_t len) 3304 { 3305 char *data = (char *)ev + sizeof(*ev); 3306 struct Scsi_Host *shost; 3307 int index; 3308 int err = 0; 3309 3310 if (!transport->new_flashnode) { 3311 err = -ENOSYS; 3312 goto exit_new_fnode; 3313 } 3314 3315 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3316 if (!shost) { 3317 pr_err("%s could not find host no %u\n", 3318 __func__, ev->u.new_flashnode.host_no); 3319 err = -ENODEV; 3320 goto put_host; 3321 } 3322 3323 index = transport->new_flashnode(shost, data, len); 3324 3325 if (index >= 0) 3326 ev->r.new_flashnode_ret.flashnode_idx = index; 3327 else 3328 err = -EIO; 3329 3330 put_host: 3331 scsi_host_put(shost); 3332 3333 exit_new_fnode: 3334 return err; 3335 } 3336 3337 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3338 struct iscsi_uevent *ev) 3339 { 3340 struct Scsi_Host *shost; 3341 struct iscsi_bus_flash_session *fnode_sess; 3342 uint32_t idx; 3343 int err = 0; 3344 3345 if (!transport->del_flashnode) { 3346 err = -ENOSYS; 3347 goto exit_del_fnode; 3348 } 3349 3350 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3351 if (!shost) { 3352 pr_err("%s could not find host no %u\n", 3353 __func__, ev->u.del_flashnode.host_no); 3354 err = -ENODEV; 3355 goto put_host; 3356 } 3357 3358 idx = ev->u.del_flashnode.flashnode_idx; 3359 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3360 if (!fnode_sess) { 3361 pr_err("%s could not find flashnode %u for host no %u\n", 3362 __func__, idx, ev->u.del_flashnode.host_no); 3363 err = -ENODEV; 3364 goto put_host; 3365 } 3366 3367 err = transport->del_flashnode(fnode_sess); 3368 put_device(&fnode_sess->dev); 3369 3370 put_host: 3371 scsi_host_put(shost); 3372 3373 exit_del_fnode: 3374 return err; 3375 } 3376 3377 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3378 struct iscsi_uevent *ev) 3379 { 3380 struct Scsi_Host *shost; 3381 struct iscsi_bus_flash_session *fnode_sess; 3382 struct iscsi_bus_flash_conn *fnode_conn; 3383 struct device *dev; 3384 uint32_t idx; 3385 int err = 0; 3386 3387 if (!transport->login_flashnode) { 3388 err = -ENOSYS; 3389 goto exit_login_fnode; 3390 } 3391 3392 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3393 if (!shost) { 3394 pr_err("%s could not find host no %u\n", 3395 __func__, ev->u.login_flashnode.host_no); 3396 err = -ENODEV; 3397 goto put_host; 3398 } 3399 3400 idx = ev->u.login_flashnode.flashnode_idx; 3401 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3402 if (!fnode_sess) { 3403 pr_err("%s could not find flashnode %u for host no %u\n", 3404 __func__, idx, ev->u.login_flashnode.host_no); 3405 err = -ENODEV; 3406 goto put_host; 3407 } 3408 3409 dev = iscsi_find_flashnode_conn(fnode_sess); 3410 if (!dev) { 3411 err = -ENODEV; 3412 goto put_sess; 3413 } 3414 3415 fnode_conn = iscsi_dev_to_flash_conn(dev); 3416 err = transport->login_flashnode(fnode_sess, fnode_conn); 3417 put_device(dev); 3418 3419 put_sess: 3420 put_device(&fnode_sess->dev); 3421 3422 put_host: 3423 scsi_host_put(shost); 3424 3425 exit_login_fnode: 3426 return err; 3427 } 3428 3429 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3430 struct iscsi_uevent *ev) 3431 { 3432 struct Scsi_Host *shost; 3433 struct iscsi_bus_flash_session *fnode_sess; 3434 struct iscsi_bus_flash_conn *fnode_conn; 3435 struct device *dev; 3436 uint32_t idx; 3437 int err = 0; 3438 3439 if (!transport->logout_flashnode) { 3440 err = -ENOSYS; 3441 goto exit_logout_fnode; 3442 } 3443 3444 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3445 if (!shost) { 3446 pr_err("%s could not find host no %u\n", 3447 __func__, ev->u.logout_flashnode.host_no); 3448 err = -ENODEV; 3449 goto put_host; 3450 } 3451 3452 idx = ev->u.logout_flashnode.flashnode_idx; 3453 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3454 if (!fnode_sess) { 3455 pr_err("%s could not find flashnode %u for host no %u\n", 3456 __func__, idx, ev->u.logout_flashnode.host_no); 3457 err = -ENODEV; 3458 goto put_host; 3459 } 3460 3461 dev = iscsi_find_flashnode_conn(fnode_sess); 3462 if (!dev) { 3463 err = -ENODEV; 3464 goto put_sess; 3465 } 3466 3467 fnode_conn = iscsi_dev_to_flash_conn(dev); 3468 3469 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3470 put_device(dev); 3471 3472 put_sess: 3473 put_device(&fnode_sess->dev); 3474 3475 put_host: 3476 scsi_host_put(shost); 3477 3478 exit_logout_fnode: 3479 return err; 3480 } 3481 3482 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3483 struct iscsi_uevent *ev) 3484 { 3485 struct Scsi_Host *shost; 3486 struct iscsi_cls_session *session; 3487 int err = 0; 3488 3489 if (!transport->logout_flashnode_sid) { 3490 err = -ENOSYS; 3491 goto exit_logout_sid; 3492 } 3493 3494 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3495 if (!shost) { 3496 pr_err("%s could not find host no %u\n", 3497 __func__, ev->u.logout_flashnode.host_no); 3498 err = -ENODEV; 3499 goto put_host; 3500 } 3501 3502 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3503 if (!session) { 3504 pr_err("%s could not find session id %u\n", 3505 __func__, ev->u.logout_flashnode_sid.sid); 3506 err = -EINVAL; 3507 goto put_host; 3508 } 3509 3510 err = transport->logout_flashnode_sid(session); 3511 3512 put_host: 3513 scsi_host_put(shost); 3514 3515 exit_logout_sid: 3516 return err; 3517 } 3518 3519 static int 3520 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3521 { 3522 struct iscsi_uevent *ev = nlmsg_data(nlh); 3523 struct Scsi_Host *shost = NULL; 3524 struct iscsi_internal *priv; 3525 struct sk_buff *skbhost_stats; 3526 struct nlmsghdr *nlhhost_stats; 3527 struct iscsi_uevent *evhost_stats; 3528 int host_stats_size = 0; 3529 int len, err = 0; 3530 char *buf; 3531 3532 if (!transport->get_host_stats) 3533 return -ENOSYS; 3534 3535 priv = iscsi_if_transport_lookup(transport); 3536 if (!priv) 3537 return -EINVAL; 3538 3539 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3540 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3541 3542 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3543 if (!shost) { 3544 pr_err("%s: failed. Could not find host no %u\n", 3545 __func__, ev->u.get_host_stats.host_no); 3546 return -ENODEV; 3547 } 3548 3549 do { 3550 int actual_size; 3551 3552 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3553 if (!skbhost_stats) { 3554 pr_err("cannot deliver host stats: OOM\n"); 3555 err = -ENOMEM; 3556 goto exit_host_stats; 3557 } 3558 3559 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3560 (len - sizeof(*nlhhost_stats)), 0); 3561 evhost_stats = nlmsg_data(nlhhost_stats); 3562 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3563 evhost_stats->transport_handle = iscsi_handle(transport); 3564 evhost_stats->type = nlh->nlmsg_type; 3565 evhost_stats->u.get_host_stats.host_no = 3566 ev->u.get_host_stats.host_no; 3567 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3568 memset(buf, 0, host_stats_size); 3569 3570 err = transport->get_host_stats(shost, buf, host_stats_size); 3571 if (err) { 3572 kfree_skb(skbhost_stats); 3573 goto exit_host_stats; 3574 } 3575 3576 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3577 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3578 nlhhost_stats->nlmsg_len = actual_size; 3579 3580 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3581 GFP_KERNEL); 3582 } while (err < 0 && err != -ECONNREFUSED); 3583 3584 exit_host_stats: 3585 scsi_host_put(shost); 3586 return err; 3587 } 3588 3589 3590 static int 3591 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3592 { 3593 int err = 0; 3594 u32 portid; 3595 struct iscsi_uevent *ev = nlmsg_data(nlh); 3596 struct iscsi_transport *transport = NULL; 3597 struct iscsi_internal *priv; 3598 struct iscsi_cls_session *session; 3599 struct iscsi_cls_conn *conn; 3600 struct iscsi_endpoint *ep = NULL; 3601 3602 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3603 *group = ISCSI_NL_GRP_UIP; 3604 else 3605 *group = ISCSI_NL_GRP_ISCSID; 3606 3607 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3608 if (!priv) 3609 return -EINVAL; 3610 transport = priv->iscsi_transport; 3611 3612 if (!try_module_get(transport->owner)) 3613 return -EINVAL; 3614 3615 portid = NETLINK_CB(skb).portid; 3616 3617 switch (nlh->nlmsg_type) { 3618 case ISCSI_UEVENT_CREATE_SESSION: 3619 err = iscsi_if_create_session(priv, ep, ev, 3620 portid, 3621 ev->u.c_session.initial_cmdsn, 3622 ev->u.c_session.cmds_max, 3623 ev->u.c_session.queue_depth); 3624 break; 3625 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3626 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3627 if (!ep) { 3628 err = -EINVAL; 3629 break; 3630 } 3631 3632 err = iscsi_if_create_session(priv, ep, ev, 3633 portid, 3634 ev->u.c_bound_session.initial_cmdsn, 3635 ev->u.c_bound_session.cmds_max, 3636 ev->u.c_bound_session.queue_depth); 3637 break; 3638 case ISCSI_UEVENT_DESTROY_SESSION: 3639 session = iscsi_session_lookup(ev->u.d_session.sid); 3640 if (!session) 3641 err = -EINVAL; 3642 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3643 err = -EBUSY; 3644 else 3645 transport->destroy_session(session); 3646 break; 3647 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3648 session = iscsi_session_lookup(ev->u.d_session.sid); 3649 if (!session) 3650 err = -EINVAL; 3651 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3652 err = -EBUSY; 3653 else { 3654 unsigned long flags; 3655 3656 /* Prevent this session from being found again */ 3657 spin_lock_irqsave(&sesslock, flags); 3658 list_move(&session->sess_list, &sessdestroylist); 3659 spin_unlock_irqrestore(&sesslock, flags); 3660 3661 queue_work(iscsi_destroy_workq, &session->destroy_work); 3662 } 3663 break; 3664 case ISCSI_UEVENT_UNBIND_SESSION: 3665 session = iscsi_session_lookup(ev->u.d_session.sid); 3666 if (session) 3667 scsi_queue_work(iscsi_session_to_shost(session), 3668 &session->unbind_work); 3669 else 3670 err = -EINVAL; 3671 break; 3672 case ISCSI_UEVENT_CREATE_CONN: 3673 err = iscsi_if_create_conn(transport, ev); 3674 break; 3675 case ISCSI_UEVENT_DESTROY_CONN: 3676 err = iscsi_if_destroy_conn(transport, ev); 3677 break; 3678 case ISCSI_UEVENT_BIND_CONN: 3679 session = iscsi_session_lookup(ev->u.b_conn.sid); 3680 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3681 3682 if (conn && conn->ep) 3683 iscsi_if_ep_disconnect(transport, conn->ep->id); 3684 3685 if (!session || !conn) { 3686 err = -EINVAL; 3687 break; 3688 } 3689 3690 ev->r.retcode = transport->bind_conn(session, conn, 3691 ev->u.b_conn.transport_eph, 3692 ev->u.b_conn.is_leading); 3693 if (ev->r.retcode || !transport->ep_connect) 3694 break; 3695 3696 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3697 if (ep) { 3698 ep->conn = conn; 3699 3700 mutex_lock(&conn->ep_mutex); 3701 conn->ep = ep; 3702 mutex_unlock(&conn->ep_mutex); 3703 } else 3704 iscsi_cls_conn_printk(KERN_ERR, conn, 3705 "Could not set ep conn " 3706 "binding\n"); 3707 break; 3708 case ISCSI_UEVENT_SET_PARAM: 3709 err = iscsi_set_param(transport, ev); 3710 break; 3711 case ISCSI_UEVENT_START_CONN: 3712 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3713 if (conn) { 3714 ev->r.retcode = transport->start_conn(conn); 3715 if (!ev->r.retcode) 3716 conn->state = ISCSI_CONN_UP; 3717 } 3718 else 3719 err = -EINVAL; 3720 break; 3721 case ISCSI_UEVENT_STOP_CONN: 3722 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3723 if (conn) 3724 transport->stop_conn(conn, ev->u.stop_conn.flag); 3725 else 3726 err = -EINVAL; 3727 break; 3728 case ISCSI_UEVENT_SEND_PDU: 3729 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3730 if (conn) 3731 ev->r.retcode = transport->send_pdu(conn, 3732 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3733 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3734 ev->u.send_pdu.data_size); 3735 else 3736 err = -EINVAL; 3737 break; 3738 case ISCSI_UEVENT_GET_STATS: 3739 err = iscsi_if_get_stats(transport, nlh); 3740 break; 3741 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3742 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3743 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3744 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3745 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3746 break; 3747 case ISCSI_UEVENT_TGT_DSCVR: 3748 err = iscsi_tgt_dscvr(transport, ev); 3749 break; 3750 case ISCSI_UEVENT_SET_HOST_PARAM: 3751 err = iscsi_set_host_param(transport, ev); 3752 break; 3753 case ISCSI_UEVENT_PATH_UPDATE: 3754 err = iscsi_set_path(transport, ev); 3755 break; 3756 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3757 err = iscsi_set_iface_params(transport, ev, 3758 nlmsg_attrlen(nlh, sizeof(*ev))); 3759 break; 3760 case ISCSI_UEVENT_PING: 3761 err = iscsi_send_ping(transport, ev); 3762 break; 3763 case ISCSI_UEVENT_GET_CHAP: 3764 err = iscsi_get_chap(transport, nlh); 3765 break; 3766 case ISCSI_UEVENT_DELETE_CHAP: 3767 err = iscsi_delete_chap(transport, ev); 3768 break; 3769 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3770 err = iscsi_set_flashnode_param(transport, ev, 3771 nlmsg_attrlen(nlh, 3772 sizeof(*ev))); 3773 break; 3774 case ISCSI_UEVENT_NEW_FLASHNODE: 3775 err = iscsi_new_flashnode(transport, ev, 3776 nlmsg_attrlen(nlh, sizeof(*ev))); 3777 break; 3778 case ISCSI_UEVENT_DEL_FLASHNODE: 3779 err = iscsi_del_flashnode(transport, ev); 3780 break; 3781 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3782 err = iscsi_login_flashnode(transport, ev); 3783 break; 3784 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3785 err = iscsi_logout_flashnode(transport, ev); 3786 break; 3787 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3788 err = iscsi_logout_flashnode_sid(transport, ev); 3789 break; 3790 case ISCSI_UEVENT_SET_CHAP: 3791 err = iscsi_set_chap(transport, ev, 3792 nlmsg_attrlen(nlh, sizeof(*ev))); 3793 break; 3794 case ISCSI_UEVENT_GET_HOST_STATS: 3795 err = iscsi_get_host_stats(transport, nlh); 3796 break; 3797 default: 3798 err = -ENOSYS; 3799 break; 3800 } 3801 3802 module_put(transport->owner); 3803 return err; 3804 } 3805 3806 /* 3807 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3808 * Malformed skbs with wrong lengths or invalid creds are not processed. 3809 */ 3810 static void 3811 iscsi_if_rx(struct sk_buff *skb) 3812 { 3813 u32 portid = NETLINK_CB(skb).portid; 3814 3815 mutex_lock(&rx_queue_mutex); 3816 while (skb->len >= NLMSG_HDRLEN) { 3817 int err; 3818 uint32_t rlen; 3819 struct nlmsghdr *nlh; 3820 struct iscsi_uevent *ev; 3821 uint32_t group; 3822 int retries = ISCSI_SEND_MAX_ALLOWED; 3823 3824 nlh = nlmsg_hdr(skb); 3825 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3826 skb->len < nlh->nlmsg_len) { 3827 break; 3828 } 3829 3830 ev = nlmsg_data(nlh); 3831 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3832 if (rlen > skb->len) 3833 rlen = skb->len; 3834 3835 err = iscsi_if_recv_msg(skb, nlh, &group); 3836 if (err) { 3837 ev->type = ISCSI_KEVENT_IF_ERROR; 3838 ev->iferror = err; 3839 } 3840 do { 3841 /* 3842 * special case for GET_STATS: 3843 * on success - sending reply and stats from 3844 * inside of if_recv_msg(), 3845 * on error - fall through. 3846 */ 3847 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3848 break; 3849 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3850 break; 3851 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3852 ev, sizeof(*ev)); 3853 if (err == -EAGAIN && --retries < 0) { 3854 printk(KERN_WARNING "Send reply failed, error %d\n", err); 3855 break; 3856 } 3857 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3858 skb_pull(skb, rlen); 3859 } 3860 mutex_unlock(&rx_queue_mutex); 3861 } 3862 3863 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3864 struct device_attribute dev_attr_##_prefix##_##_name = \ 3865 __ATTR(_name,_mode,_show,_store) 3866 3867 /* 3868 * iSCSI connection attrs 3869 */ 3870 #define iscsi_conn_attr_show(param) \ 3871 static ssize_t \ 3872 show_conn_param_##param(struct device *dev, \ 3873 struct device_attribute *attr, char *buf) \ 3874 { \ 3875 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3876 struct iscsi_transport *t = conn->transport; \ 3877 return t->get_conn_param(conn, param, buf); \ 3878 } 3879 3880 #define iscsi_conn_attr(field, param) \ 3881 iscsi_conn_attr_show(param) \ 3882 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3883 NULL); 3884 3885 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3886 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3887 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3888 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3889 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3890 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3891 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3892 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3893 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3894 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3895 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3896 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3897 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3898 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3899 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3900 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3901 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3902 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3903 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3904 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3905 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3906 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3907 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3908 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3909 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3910 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3911 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3912 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3913 3914 static const char *const connection_state_names[] = { 3915 [ISCSI_CONN_UP] = "up", 3916 [ISCSI_CONN_DOWN] = "down", 3917 [ISCSI_CONN_FAILED] = "failed" 3918 }; 3919 3920 static ssize_t show_conn_state(struct device *dev, 3921 struct device_attribute *attr, char *buf) 3922 { 3923 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 3924 const char *state = "unknown"; 3925 3926 if (conn->state >= 0 && 3927 conn->state < ARRAY_SIZE(connection_state_names)) 3928 state = connection_state_names[conn->state]; 3929 3930 return sprintf(buf, "%s\n", state); 3931 } 3932 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 3933 NULL); 3934 3935 #define iscsi_conn_ep_attr_show(param) \ 3936 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 3937 struct device_attribute *attr,\ 3938 char *buf) \ 3939 { \ 3940 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3941 struct iscsi_transport *t = conn->transport; \ 3942 struct iscsi_endpoint *ep; \ 3943 ssize_t rc; \ 3944 \ 3945 /* \ 3946 * Need to make sure ep_disconnect does not free the LLD's \ 3947 * interconnect resources while we are trying to read them. \ 3948 */ \ 3949 mutex_lock(&conn->ep_mutex); \ 3950 ep = conn->ep; \ 3951 if (!ep && t->ep_connect) { \ 3952 mutex_unlock(&conn->ep_mutex); \ 3953 return -ENOTCONN; \ 3954 } \ 3955 \ 3956 if (ep) \ 3957 rc = t->get_ep_param(ep, param, buf); \ 3958 else \ 3959 rc = t->get_conn_param(conn, param, buf); \ 3960 mutex_unlock(&conn->ep_mutex); \ 3961 return rc; \ 3962 } 3963 3964 #define iscsi_conn_ep_attr(field, param) \ 3965 iscsi_conn_ep_attr_show(param) \ 3966 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 3967 show_conn_ep_param_##param, NULL); 3968 3969 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 3970 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 3971 3972 static struct attribute *iscsi_conn_attrs[] = { 3973 &dev_attr_conn_max_recv_dlength.attr, 3974 &dev_attr_conn_max_xmit_dlength.attr, 3975 &dev_attr_conn_header_digest.attr, 3976 &dev_attr_conn_data_digest.attr, 3977 &dev_attr_conn_ifmarker.attr, 3978 &dev_attr_conn_ofmarker.attr, 3979 &dev_attr_conn_address.attr, 3980 &dev_attr_conn_port.attr, 3981 &dev_attr_conn_exp_statsn.attr, 3982 &dev_attr_conn_persistent_address.attr, 3983 &dev_attr_conn_persistent_port.attr, 3984 &dev_attr_conn_ping_tmo.attr, 3985 &dev_attr_conn_recv_tmo.attr, 3986 &dev_attr_conn_local_port.attr, 3987 &dev_attr_conn_statsn.attr, 3988 &dev_attr_conn_keepalive_tmo.attr, 3989 &dev_attr_conn_max_segment_size.attr, 3990 &dev_attr_conn_tcp_timestamp_stat.attr, 3991 &dev_attr_conn_tcp_wsf_disable.attr, 3992 &dev_attr_conn_tcp_nagle_disable.attr, 3993 &dev_attr_conn_tcp_timer_scale.attr, 3994 &dev_attr_conn_tcp_timestamp_enable.attr, 3995 &dev_attr_conn_fragment_disable.attr, 3996 &dev_attr_conn_ipv4_tos.attr, 3997 &dev_attr_conn_ipv6_traffic_class.attr, 3998 &dev_attr_conn_ipv6_flow_label.attr, 3999 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4000 &dev_attr_conn_tcp_xmit_wsf.attr, 4001 &dev_attr_conn_tcp_recv_wsf.attr, 4002 &dev_attr_conn_local_ipaddr.attr, 4003 &dev_attr_conn_state.attr, 4004 NULL, 4005 }; 4006 4007 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4008 struct attribute *attr, int i) 4009 { 4010 struct device *cdev = container_of(kobj, struct device, kobj); 4011 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4012 struct iscsi_transport *t = conn->transport; 4013 int param; 4014 4015 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4016 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4017 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4018 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4019 else if (attr == &dev_attr_conn_header_digest.attr) 4020 param = ISCSI_PARAM_HDRDGST_EN; 4021 else if (attr == &dev_attr_conn_data_digest.attr) 4022 param = ISCSI_PARAM_DATADGST_EN; 4023 else if (attr == &dev_attr_conn_ifmarker.attr) 4024 param = ISCSI_PARAM_IFMARKER_EN; 4025 else if (attr == &dev_attr_conn_ofmarker.attr) 4026 param = ISCSI_PARAM_OFMARKER_EN; 4027 else if (attr == &dev_attr_conn_address.attr) 4028 param = ISCSI_PARAM_CONN_ADDRESS; 4029 else if (attr == &dev_attr_conn_port.attr) 4030 param = ISCSI_PARAM_CONN_PORT; 4031 else if (attr == &dev_attr_conn_exp_statsn.attr) 4032 param = ISCSI_PARAM_EXP_STATSN; 4033 else if (attr == &dev_attr_conn_persistent_address.attr) 4034 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4035 else if (attr == &dev_attr_conn_persistent_port.attr) 4036 param = ISCSI_PARAM_PERSISTENT_PORT; 4037 else if (attr == &dev_attr_conn_ping_tmo.attr) 4038 param = ISCSI_PARAM_PING_TMO; 4039 else if (attr == &dev_attr_conn_recv_tmo.attr) 4040 param = ISCSI_PARAM_RECV_TMO; 4041 else if (attr == &dev_attr_conn_local_port.attr) 4042 param = ISCSI_PARAM_LOCAL_PORT; 4043 else if (attr == &dev_attr_conn_statsn.attr) 4044 param = ISCSI_PARAM_STATSN; 4045 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4046 param = ISCSI_PARAM_KEEPALIVE_TMO; 4047 else if (attr == &dev_attr_conn_max_segment_size.attr) 4048 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4049 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4050 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4051 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4052 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4053 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4054 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4055 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4056 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4057 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4058 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4059 else if (attr == &dev_attr_conn_fragment_disable.attr) 4060 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4061 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4062 param = ISCSI_PARAM_IPV4_TOS; 4063 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4064 param = ISCSI_PARAM_IPV6_TC; 4065 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4066 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4067 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4068 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4069 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4070 param = ISCSI_PARAM_TCP_XMIT_WSF; 4071 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4072 param = ISCSI_PARAM_TCP_RECV_WSF; 4073 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4074 param = ISCSI_PARAM_LOCAL_IPADDR; 4075 else if (attr == &dev_attr_conn_state.attr) 4076 return S_IRUGO; 4077 else { 4078 WARN_ONCE(1, "Invalid conn attr"); 4079 return 0; 4080 } 4081 4082 return t->attr_is_visible(ISCSI_PARAM, param); 4083 } 4084 4085 static struct attribute_group iscsi_conn_group = { 4086 .attrs = iscsi_conn_attrs, 4087 .is_visible = iscsi_conn_attr_is_visible, 4088 }; 4089 4090 /* 4091 * iSCSI session attrs 4092 */ 4093 #define iscsi_session_attr_show(param, perm) \ 4094 static ssize_t \ 4095 show_session_param_##param(struct device *dev, \ 4096 struct device_attribute *attr, char *buf) \ 4097 { \ 4098 struct iscsi_cls_session *session = \ 4099 iscsi_dev_to_session(dev->parent); \ 4100 struct iscsi_transport *t = session->transport; \ 4101 \ 4102 if (perm && !capable(CAP_SYS_ADMIN)) \ 4103 return -EACCES; \ 4104 return t->get_session_param(session, param, buf); \ 4105 } 4106 4107 #define iscsi_session_attr(field, param, perm) \ 4108 iscsi_session_attr_show(param, perm) \ 4109 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4110 NULL); 4111 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4112 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4113 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4114 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4115 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4116 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4117 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4118 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4119 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4120 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4121 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4122 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4123 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4124 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4125 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4126 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4127 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4128 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4129 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4130 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4131 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4132 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4133 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4134 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4135 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4136 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4137 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4138 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4139 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4140 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4141 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4142 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4143 iscsi_session_attr(discovery_auth_optional, 4144 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4145 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4146 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4147 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4148 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4149 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4150 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4151 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4152 4153 static ssize_t 4154 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4155 char *buf) 4156 { 4157 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4158 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); 4159 } 4160 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4161 NULL); 4162 static ssize_t 4163 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4164 char *buf) 4165 { 4166 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4167 return sprintf(buf, "%d\n", session->creator); 4168 } 4169 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4170 NULL); 4171 static ssize_t 4172 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4173 char *buf) 4174 { 4175 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4176 return sprintf(buf, "%d\n", session->target_id); 4177 } 4178 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4179 show_priv_session_target_id, NULL); 4180 4181 #define iscsi_priv_session_attr_show(field, format) \ 4182 static ssize_t \ 4183 show_priv_session_##field(struct device *dev, \ 4184 struct device_attribute *attr, char *buf) \ 4185 { \ 4186 struct iscsi_cls_session *session = \ 4187 iscsi_dev_to_session(dev->parent); \ 4188 if (session->field == -1) \ 4189 return sprintf(buf, "off\n"); \ 4190 return sprintf(buf, format"\n", session->field); \ 4191 } 4192 4193 #define iscsi_priv_session_attr_store(field) \ 4194 static ssize_t \ 4195 store_priv_session_##field(struct device *dev, \ 4196 struct device_attribute *attr, \ 4197 const char *buf, size_t count) \ 4198 { \ 4199 int val; \ 4200 char *cp; \ 4201 struct iscsi_cls_session *session = \ 4202 iscsi_dev_to_session(dev->parent); \ 4203 if ((session->state == ISCSI_SESSION_FREE) || \ 4204 (session->state == ISCSI_SESSION_FAILED)) \ 4205 return -EBUSY; \ 4206 if (strncmp(buf, "off", 3) == 0) { \ 4207 session->field = -1; \ 4208 session->field##_sysfs_override = true; \ 4209 } else { \ 4210 val = simple_strtoul(buf, &cp, 0); \ 4211 if (*cp != '\0' && *cp != '\n') \ 4212 return -EINVAL; \ 4213 session->field = val; \ 4214 session->field##_sysfs_override = true; \ 4215 } \ 4216 return count; \ 4217 } 4218 4219 #define iscsi_priv_session_rw_attr(field, format) \ 4220 iscsi_priv_session_attr_show(field, format) \ 4221 iscsi_priv_session_attr_store(field) \ 4222 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4223 show_priv_session_##field, \ 4224 store_priv_session_##field) 4225 4226 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4227 4228 static struct attribute *iscsi_session_attrs[] = { 4229 &dev_attr_sess_initial_r2t.attr, 4230 &dev_attr_sess_max_outstanding_r2t.attr, 4231 &dev_attr_sess_immediate_data.attr, 4232 &dev_attr_sess_first_burst_len.attr, 4233 &dev_attr_sess_max_burst_len.attr, 4234 &dev_attr_sess_data_pdu_in_order.attr, 4235 &dev_attr_sess_data_seq_in_order.attr, 4236 &dev_attr_sess_erl.attr, 4237 &dev_attr_sess_targetname.attr, 4238 &dev_attr_sess_tpgt.attr, 4239 &dev_attr_sess_password.attr, 4240 &dev_attr_sess_password_in.attr, 4241 &dev_attr_sess_username.attr, 4242 &dev_attr_sess_username_in.attr, 4243 &dev_attr_sess_fast_abort.attr, 4244 &dev_attr_sess_abort_tmo.attr, 4245 &dev_attr_sess_lu_reset_tmo.attr, 4246 &dev_attr_sess_tgt_reset_tmo.attr, 4247 &dev_attr_sess_ifacename.attr, 4248 &dev_attr_sess_initiatorname.attr, 4249 &dev_attr_sess_targetalias.attr, 4250 &dev_attr_sess_boot_root.attr, 4251 &dev_attr_sess_boot_nic.attr, 4252 &dev_attr_sess_boot_target.attr, 4253 &dev_attr_priv_sess_recovery_tmo.attr, 4254 &dev_attr_priv_sess_state.attr, 4255 &dev_attr_priv_sess_creator.attr, 4256 &dev_attr_sess_chap_out_idx.attr, 4257 &dev_attr_sess_chap_in_idx.attr, 4258 &dev_attr_priv_sess_target_id.attr, 4259 &dev_attr_sess_auto_snd_tgt_disable.attr, 4260 &dev_attr_sess_discovery_session.attr, 4261 &dev_attr_sess_portal_type.attr, 4262 &dev_attr_sess_chap_auth.attr, 4263 &dev_attr_sess_discovery_logout.attr, 4264 &dev_attr_sess_bidi_chap.attr, 4265 &dev_attr_sess_discovery_auth_optional.attr, 4266 &dev_attr_sess_def_time2wait.attr, 4267 &dev_attr_sess_def_time2retain.attr, 4268 &dev_attr_sess_isid.attr, 4269 &dev_attr_sess_tsid.attr, 4270 &dev_attr_sess_def_taskmgmt_tmo.attr, 4271 &dev_attr_sess_discovery_parent_idx.attr, 4272 &dev_attr_sess_discovery_parent_type.attr, 4273 NULL, 4274 }; 4275 4276 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4277 struct attribute *attr, int i) 4278 { 4279 struct device *cdev = container_of(kobj, struct device, kobj); 4280 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4281 struct iscsi_transport *t = session->transport; 4282 int param; 4283 4284 if (attr == &dev_attr_sess_initial_r2t.attr) 4285 param = ISCSI_PARAM_INITIAL_R2T_EN; 4286 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4287 param = ISCSI_PARAM_MAX_R2T; 4288 else if (attr == &dev_attr_sess_immediate_data.attr) 4289 param = ISCSI_PARAM_IMM_DATA_EN; 4290 else if (attr == &dev_attr_sess_first_burst_len.attr) 4291 param = ISCSI_PARAM_FIRST_BURST; 4292 else if (attr == &dev_attr_sess_max_burst_len.attr) 4293 param = ISCSI_PARAM_MAX_BURST; 4294 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4295 param = ISCSI_PARAM_PDU_INORDER_EN; 4296 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4297 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4298 else if (attr == &dev_attr_sess_erl.attr) 4299 param = ISCSI_PARAM_ERL; 4300 else if (attr == &dev_attr_sess_targetname.attr) 4301 param = ISCSI_PARAM_TARGET_NAME; 4302 else if (attr == &dev_attr_sess_tpgt.attr) 4303 param = ISCSI_PARAM_TPGT; 4304 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4305 param = ISCSI_PARAM_CHAP_IN_IDX; 4306 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4307 param = ISCSI_PARAM_CHAP_OUT_IDX; 4308 else if (attr == &dev_attr_sess_password.attr) 4309 param = ISCSI_PARAM_USERNAME; 4310 else if (attr == &dev_attr_sess_password_in.attr) 4311 param = ISCSI_PARAM_USERNAME_IN; 4312 else if (attr == &dev_attr_sess_username.attr) 4313 param = ISCSI_PARAM_PASSWORD; 4314 else if (attr == &dev_attr_sess_username_in.attr) 4315 param = ISCSI_PARAM_PASSWORD_IN; 4316 else if (attr == &dev_attr_sess_fast_abort.attr) 4317 param = ISCSI_PARAM_FAST_ABORT; 4318 else if (attr == &dev_attr_sess_abort_tmo.attr) 4319 param = ISCSI_PARAM_ABORT_TMO; 4320 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4321 param = ISCSI_PARAM_LU_RESET_TMO; 4322 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4323 param = ISCSI_PARAM_TGT_RESET_TMO; 4324 else if (attr == &dev_attr_sess_ifacename.attr) 4325 param = ISCSI_PARAM_IFACE_NAME; 4326 else if (attr == &dev_attr_sess_initiatorname.attr) 4327 param = ISCSI_PARAM_INITIATOR_NAME; 4328 else if (attr == &dev_attr_sess_targetalias.attr) 4329 param = ISCSI_PARAM_TARGET_ALIAS; 4330 else if (attr == &dev_attr_sess_boot_root.attr) 4331 param = ISCSI_PARAM_BOOT_ROOT; 4332 else if (attr == &dev_attr_sess_boot_nic.attr) 4333 param = ISCSI_PARAM_BOOT_NIC; 4334 else if (attr == &dev_attr_sess_boot_target.attr) 4335 param = ISCSI_PARAM_BOOT_TARGET; 4336 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4337 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4338 else if (attr == &dev_attr_sess_discovery_session.attr) 4339 param = ISCSI_PARAM_DISCOVERY_SESS; 4340 else if (attr == &dev_attr_sess_portal_type.attr) 4341 param = ISCSI_PARAM_PORTAL_TYPE; 4342 else if (attr == &dev_attr_sess_chap_auth.attr) 4343 param = ISCSI_PARAM_CHAP_AUTH_EN; 4344 else if (attr == &dev_attr_sess_discovery_logout.attr) 4345 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4346 else if (attr == &dev_attr_sess_bidi_chap.attr) 4347 param = ISCSI_PARAM_BIDI_CHAP_EN; 4348 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4349 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4350 else if (attr == &dev_attr_sess_def_time2wait.attr) 4351 param = ISCSI_PARAM_DEF_TIME2WAIT; 4352 else if (attr == &dev_attr_sess_def_time2retain.attr) 4353 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4354 else if (attr == &dev_attr_sess_isid.attr) 4355 param = ISCSI_PARAM_ISID; 4356 else if (attr == &dev_attr_sess_tsid.attr) 4357 param = ISCSI_PARAM_TSID; 4358 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4359 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4360 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4361 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4362 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4363 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4364 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4365 return S_IRUGO | S_IWUSR; 4366 else if (attr == &dev_attr_priv_sess_state.attr) 4367 return S_IRUGO; 4368 else if (attr == &dev_attr_priv_sess_creator.attr) 4369 return S_IRUGO; 4370 else if (attr == &dev_attr_priv_sess_target_id.attr) 4371 return S_IRUGO; 4372 else { 4373 WARN_ONCE(1, "Invalid session attr"); 4374 return 0; 4375 } 4376 4377 return t->attr_is_visible(ISCSI_PARAM, param); 4378 } 4379 4380 static struct attribute_group iscsi_session_group = { 4381 .attrs = iscsi_session_attrs, 4382 .is_visible = iscsi_session_attr_is_visible, 4383 }; 4384 4385 /* 4386 * iSCSI host attrs 4387 */ 4388 #define iscsi_host_attr_show(param) \ 4389 static ssize_t \ 4390 show_host_param_##param(struct device *dev, \ 4391 struct device_attribute *attr, char *buf) \ 4392 { \ 4393 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4394 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4395 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4396 } 4397 4398 #define iscsi_host_attr(field, param) \ 4399 iscsi_host_attr_show(param) \ 4400 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4401 NULL); 4402 4403 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4404 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4405 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4406 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4407 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4408 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4409 4410 static struct attribute *iscsi_host_attrs[] = { 4411 &dev_attr_host_netdev.attr, 4412 &dev_attr_host_hwaddress.attr, 4413 &dev_attr_host_ipaddress.attr, 4414 &dev_attr_host_initiatorname.attr, 4415 &dev_attr_host_port_state.attr, 4416 &dev_attr_host_port_speed.attr, 4417 NULL, 4418 }; 4419 4420 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4421 struct attribute *attr, int i) 4422 { 4423 struct device *cdev = container_of(kobj, struct device, kobj); 4424 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4425 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4426 int param; 4427 4428 if (attr == &dev_attr_host_netdev.attr) 4429 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4430 else if (attr == &dev_attr_host_hwaddress.attr) 4431 param = ISCSI_HOST_PARAM_HWADDRESS; 4432 else if (attr == &dev_attr_host_ipaddress.attr) 4433 param = ISCSI_HOST_PARAM_IPADDRESS; 4434 else if (attr == &dev_attr_host_initiatorname.attr) 4435 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4436 else if (attr == &dev_attr_host_port_state.attr) 4437 param = ISCSI_HOST_PARAM_PORT_STATE; 4438 else if (attr == &dev_attr_host_port_speed.attr) 4439 param = ISCSI_HOST_PARAM_PORT_SPEED; 4440 else { 4441 WARN_ONCE(1, "Invalid host attr"); 4442 return 0; 4443 } 4444 4445 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4446 } 4447 4448 static struct attribute_group iscsi_host_group = { 4449 .attrs = iscsi_host_attrs, 4450 .is_visible = iscsi_host_attr_is_visible, 4451 }; 4452 4453 /* convert iscsi_port_speed values to ascii string name */ 4454 static const struct { 4455 enum iscsi_port_speed value; 4456 char *name; 4457 } iscsi_port_speed_names[] = { 4458 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4459 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4460 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4461 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4462 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4463 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4464 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4465 }; 4466 4467 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4468 { 4469 int i; 4470 char *speed = "Unknown!"; 4471 struct iscsi_cls_host *ihost = shost->shost_data; 4472 uint32_t port_speed = ihost->port_speed; 4473 4474 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4475 if (iscsi_port_speed_names[i].value & port_speed) { 4476 speed = iscsi_port_speed_names[i].name; 4477 break; 4478 } 4479 } 4480 return speed; 4481 } 4482 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4483 4484 /* convert iscsi_port_state values to ascii string name */ 4485 static const struct { 4486 enum iscsi_port_state value; 4487 char *name; 4488 } iscsi_port_state_names[] = { 4489 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4490 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4491 }; 4492 4493 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4494 { 4495 int i; 4496 char *state = "Unknown!"; 4497 struct iscsi_cls_host *ihost = shost->shost_data; 4498 uint32_t port_state = ihost->port_state; 4499 4500 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4501 if (iscsi_port_state_names[i].value & port_state) { 4502 state = iscsi_port_state_names[i].name; 4503 break; 4504 } 4505 } 4506 return state; 4507 } 4508 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4509 4510 static int iscsi_session_match(struct attribute_container *cont, 4511 struct device *dev) 4512 { 4513 struct iscsi_cls_session *session; 4514 struct Scsi_Host *shost; 4515 struct iscsi_internal *priv; 4516 4517 if (!iscsi_is_session_dev(dev)) 4518 return 0; 4519 4520 session = iscsi_dev_to_session(dev); 4521 shost = iscsi_session_to_shost(session); 4522 if (!shost->transportt) 4523 return 0; 4524 4525 priv = to_iscsi_internal(shost->transportt); 4526 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4527 return 0; 4528 4529 return &priv->session_cont.ac == cont; 4530 } 4531 4532 static int iscsi_conn_match(struct attribute_container *cont, 4533 struct device *dev) 4534 { 4535 struct iscsi_cls_session *session; 4536 struct iscsi_cls_conn *conn; 4537 struct Scsi_Host *shost; 4538 struct iscsi_internal *priv; 4539 4540 if (!iscsi_is_conn_dev(dev)) 4541 return 0; 4542 4543 conn = iscsi_dev_to_conn(dev); 4544 session = iscsi_dev_to_session(conn->dev.parent); 4545 shost = iscsi_session_to_shost(session); 4546 4547 if (!shost->transportt) 4548 return 0; 4549 4550 priv = to_iscsi_internal(shost->transportt); 4551 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4552 return 0; 4553 4554 return &priv->conn_cont.ac == cont; 4555 } 4556 4557 static int iscsi_host_match(struct attribute_container *cont, 4558 struct device *dev) 4559 { 4560 struct Scsi_Host *shost; 4561 struct iscsi_internal *priv; 4562 4563 if (!scsi_is_host_device(dev)) 4564 return 0; 4565 4566 shost = dev_to_shost(dev); 4567 if (!shost->transportt || 4568 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4569 return 0; 4570 4571 priv = to_iscsi_internal(shost->transportt); 4572 return &priv->t.host_attrs.ac == cont; 4573 } 4574 4575 struct scsi_transport_template * 4576 iscsi_register_transport(struct iscsi_transport *tt) 4577 { 4578 struct iscsi_internal *priv; 4579 unsigned long flags; 4580 int err; 4581 4582 BUG_ON(!tt); 4583 4584 priv = iscsi_if_transport_lookup(tt); 4585 if (priv) 4586 return NULL; 4587 4588 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4589 if (!priv) 4590 return NULL; 4591 INIT_LIST_HEAD(&priv->list); 4592 priv->iscsi_transport = tt; 4593 priv->t.user_scan = iscsi_user_scan; 4594 priv->t.create_work_queue = 1; 4595 4596 priv->dev.class = &iscsi_transport_class; 4597 dev_set_name(&priv->dev, "%s", tt->name); 4598 err = device_register(&priv->dev); 4599 if (err) 4600 goto free_priv; 4601 4602 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4603 if (err) 4604 goto unregister_dev; 4605 4606 /* host parameters */ 4607 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4608 priv->t.host_attrs.ac.match = iscsi_host_match; 4609 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4610 priv->t.host_size = sizeof(struct iscsi_cls_host); 4611 transport_container_register(&priv->t.host_attrs); 4612 4613 /* connection parameters */ 4614 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4615 priv->conn_cont.ac.match = iscsi_conn_match; 4616 priv->conn_cont.ac.grp = &iscsi_conn_group; 4617 transport_container_register(&priv->conn_cont); 4618 4619 /* session parameters */ 4620 priv->session_cont.ac.class = &iscsi_session_class.class; 4621 priv->session_cont.ac.match = iscsi_session_match; 4622 priv->session_cont.ac.grp = &iscsi_session_group; 4623 transport_container_register(&priv->session_cont); 4624 4625 spin_lock_irqsave(&iscsi_transport_lock, flags); 4626 list_add(&priv->list, &iscsi_transports); 4627 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4628 4629 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4630 return &priv->t; 4631 4632 unregister_dev: 4633 device_unregister(&priv->dev); 4634 return NULL; 4635 free_priv: 4636 kfree(priv); 4637 return NULL; 4638 } 4639 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4640 4641 int iscsi_unregister_transport(struct iscsi_transport *tt) 4642 { 4643 struct iscsi_internal *priv; 4644 unsigned long flags; 4645 4646 BUG_ON(!tt); 4647 4648 mutex_lock(&rx_queue_mutex); 4649 4650 priv = iscsi_if_transport_lookup(tt); 4651 BUG_ON (!priv); 4652 4653 spin_lock_irqsave(&iscsi_transport_lock, flags); 4654 list_del(&priv->list); 4655 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4656 4657 transport_container_unregister(&priv->conn_cont); 4658 transport_container_unregister(&priv->session_cont); 4659 transport_container_unregister(&priv->t.host_attrs); 4660 4661 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4662 device_unregister(&priv->dev); 4663 mutex_unlock(&rx_queue_mutex); 4664 4665 return 0; 4666 } 4667 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4668 4669 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4670 struct device *dev, const char *fmt, ...) 4671 { 4672 struct va_format vaf; 4673 va_list args; 4674 4675 va_start(args, fmt); 4676 vaf.fmt = fmt; 4677 vaf.va = &args; 4678 trace(dev, &vaf); 4679 va_end(args); 4680 } 4681 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4682 4683 static __init int iscsi_transport_init(void) 4684 { 4685 int err; 4686 struct netlink_kernel_cfg cfg = { 4687 .groups = 1, 4688 .input = iscsi_if_rx, 4689 }; 4690 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4691 ISCSI_TRANSPORT_VERSION); 4692 4693 atomic_set(&iscsi_session_nr, 0); 4694 4695 err = class_register(&iscsi_transport_class); 4696 if (err) 4697 return err; 4698 4699 err = class_register(&iscsi_endpoint_class); 4700 if (err) 4701 goto unregister_transport_class; 4702 4703 err = class_register(&iscsi_iface_class); 4704 if (err) 4705 goto unregister_endpoint_class; 4706 4707 err = transport_class_register(&iscsi_host_class); 4708 if (err) 4709 goto unregister_iface_class; 4710 4711 err = transport_class_register(&iscsi_connection_class); 4712 if (err) 4713 goto unregister_host_class; 4714 4715 err = transport_class_register(&iscsi_session_class); 4716 if (err) 4717 goto unregister_conn_class; 4718 4719 err = bus_register(&iscsi_flashnode_bus); 4720 if (err) 4721 goto unregister_session_class; 4722 4723 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4724 if (!nls) { 4725 err = -ENOBUFS; 4726 goto unregister_flashnode_bus; 4727 } 4728 4729 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); 4730 if (!iscsi_eh_timer_workq) { 4731 err = -ENOMEM; 4732 goto release_nls; 4733 } 4734 4735 iscsi_destroy_workq = create_singlethread_workqueue("iscsi_destroy"); 4736 if (!iscsi_destroy_workq) { 4737 err = -ENOMEM; 4738 goto destroy_wq; 4739 } 4740 4741 return 0; 4742 4743 destroy_wq: 4744 destroy_workqueue(iscsi_eh_timer_workq); 4745 release_nls: 4746 netlink_kernel_release(nls); 4747 unregister_flashnode_bus: 4748 bus_unregister(&iscsi_flashnode_bus); 4749 unregister_session_class: 4750 transport_class_unregister(&iscsi_session_class); 4751 unregister_conn_class: 4752 transport_class_unregister(&iscsi_connection_class); 4753 unregister_host_class: 4754 transport_class_unregister(&iscsi_host_class); 4755 unregister_iface_class: 4756 class_unregister(&iscsi_iface_class); 4757 unregister_endpoint_class: 4758 class_unregister(&iscsi_endpoint_class); 4759 unregister_transport_class: 4760 class_unregister(&iscsi_transport_class); 4761 return err; 4762 } 4763 4764 static void __exit iscsi_transport_exit(void) 4765 { 4766 destroy_workqueue(iscsi_destroy_workq); 4767 destroy_workqueue(iscsi_eh_timer_workq); 4768 netlink_kernel_release(nls); 4769 bus_unregister(&iscsi_flashnode_bus); 4770 transport_class_unregister(&iscsi_connection_class); 4771 transport_class_unregister(&iscsi_session_class); 4772 transport_class_unregister(&iscsi_host_class); 4773 class_unregister(&iscsi_endpoint_class); 4774 class_unregister(&iscsi_iface_class); 4775 class_unregister(&iscsi_transport_class); 4776 } 4777 4778 module_init(iscsi_transport_init); 4779 module_exit(iscsi_transport_exit); 4780 4781 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4782 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4783 "Alex Aizman <itn780@yahoo.com>"); 4784 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4785 MODULE_LICENSE("GPL"); 4786 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4787 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4788