1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * iSCSI transport class definitions 4 * 5 * Copyright (C) IBM Corporation, 2004 6 * Copyright (C) Mike Christie, 2004 - 2005 7 * Copyright (C) Dmitry Yusupov, 2004 - 2005 8 * Copyright (C) Alex Aizman, 2004 - 2005 9 */ 10 #include <linux/module.h> 11 #include <linux/mutex.h> 12 #include <linux/slab.h> 13 #include <linux/bsg-lib.h> 14 #include <linux/idr.h> 15 #include <net/tcp.h> 16 #include <scsi/scsi.h> 17 #include <scsi/scsi_host.h> 18 #include <scsi/scsi_device.h> 19 #include <scsi/scsi_transport.h> 20 #include <scsi/scsi_transport_iscsi.h> 21 #include <scsi/iscsi_if.h> 22 #include <scsi/scsi_cmnd.h> 23 #include <scsi/scsi_bsg_iscsi.h> 24 25 #define ISCSI_TRANSPORT_VERSION "2.0-870" 26 27 #define ISCSI_SEND_MAX_ALLOWED 10 28 29 #define CREATE_TRACE_POINTS 30 #include <trace/events/iscsi.h> 31 32 /* 33 * Export tracepoint symbols to be used by other modules. 34 */ 35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn); 36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh); 37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session); 38 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp); 39 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp); 40 41 static int dbg_session; 42 module_param_named(debug_session, dbg_session, int, 43 S_IRUGO | S_IWUSR); 44 MODULE_PARM_DESC(debug_session, 45 "Turn on debugging for sessions in scsi_transport_iscsi " 46 "module. Set to 1 to turn on, and zero to turn off. Default " 47 "is off."); 48 49 static int dbg_conn; 50 module_param_named(debug_conn, dbg_conn, int, 51 S_IRUGO | S_IWUSR); 52 MODULE_PARM_DESC(debug_conn, 53 "Turn on debugging for connections in scsi_transport_iscsi " 54 "module. Set to 1 to turn on, and zero to turn off. Default " 55 "is off."); 56 57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ 58 do { \ 59 if (dbg_session) \ 60 iscsi_cls_session_printk(KERN_INFO, _session, \ 61 "%s: " dbg_fmt, \ 62 __func__, ##arg); \ 63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \ 64 &(_session)->dev, \ 65 "%s " dbg_fmt, __func__, ##arg); \ 66 } while (0); 67 68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ 69 do { \ 70 if (dbg_conn) \ 71 iscsi_cls_conn_printk(KERN_INFO, _conn, \ 72 "%s: " dbg_fmt, \ 73 __func__, ##arg); \ 74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \ 75 &(_conn)->dev, \ 76 "%s " dbg_fmt, __func__, ##arg); \ 77 } while (0); 78 79 struct iscsi_internal { 80 struct scsi_transport_template t; 81 struct iscsi_transport *iscsi_transport; 82 struct list_head list; 83 struct device dev; 84 85 struct transport_container conn_cont; 86 struct transport_container session_cont; 87 }; 88 89 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ 90 static struct workqueue_struct *iscsi_eh_timer_workq; 91 92 static DEFINE_IDA(iscsi_sess_ida); 93 /* 94 * list of registered transports and lock that must 95 * be held while accessing list. The iscsi_transport_lock must 96 * be acquired after the rx_queue_mutex. 97 */ 98 static LIST_HEAD(iscsi_transports); 99 static DEFINE_SPINLOCK(iscsi_transport_lock); 100 101 #define to_iscsi_internal(tmpl) \ 102 container_of(tmpl, struct iscsi_internal, t) 103 104 #define dev_to_iscsi_internal(_dev) \ 105 container_of(_dev, struct iscsi_internal, dev) 106 107 static void iscsi_transport_release(struct device *dev) 108 { 109 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 110 kfree(priv); 111 } 112 113 /* 114 * iscsi_transport_class represents the iscsi_transports that are 115 * registered. 116 */ 117 static struct class iscsi_transport_class = { 118 .name = "iscsi_transport", 119 .dev_release = iscsi_transport_release, 120 }; 121 122 static ssize_t 123 show_transport_handle(struct device *dev, struct device_attribute *attr, 124 char *buf) 125 { 126 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 127 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); 128 } 129 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); 130 131 #define show_transport_attr(name, format) \ 132 static ssize_t \ 133 show_transport_##name(struct device *dev, \ 134 struct device_attribute *attr,char *buf) \ 135 { \ 136 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ 137 return sprintf(buf, format"\n", priv->iscsi_transport->name); \ 138 } \ 139 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); 140 141 show_transport_attr(caps, "0x%x"); 142 143 static struct attribute *iscsi_transport_attrs[] = { 144 &dev_attr_handle.attr, 145 &dev_attr_caps.attr, 146 NULL, 147 }; 148 149 static struct attribute_group iscsi_transport_group = { 150 .attrs = iscsi_transport_attrs, 151 }; 152 153 /* 154 * iSCSI endpoint attrs 155 */ 156 #define iscsi_dev_to_endpoint(_dev) \ 157 container_of(_dev, struct iscsi_endpoint, dev) 158 159 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ 160 struct device_attribute dev_attr_##_prefix##_##_name = \ 161 __ATTR(_name,_mode,_show,_store) 162 163 static void iscsi_endpoint_release(struct device *dev) 164 { 165 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 166 kfree(ep); 167 } 168 169 static struct class iscsi_endpoint_class = { 170 .name = "iscsi_endpoint", 171 .dev_release = iscsi_endpoint_release, 172 }; 173 174 static ssize_t 175 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) 176 { 177 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 178 return sprintf(buf, "%llu\n", (unsigned long long) ep->id); 179 } 180 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); 181 182 static struct attribute *iscsi_endpoint_attrs[] = { 183 &dev_attr_ep_handle.attr, 184 NULL, 185 }; 186 187 static struct attribute_group iscsi_endpoint_group = { 188 .attrs = iscsi_endpoint_attrs, 189 }; 190 191 #define ISCSI_MAX_EPID -1 192 193 static int iscsi_match_epid(struct device *dev, const void *data) 194 { 195 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 196 const uint64_t *epid = data; 197 198 return *epid == ep->id; 199 } 200 201 struct iscsi_endpoint * 202 iscsi_create_endpoint(int dd_size) 203 { 204 struct device *dev; 205 struct iscsi_endpoint *ep; 206 uint64_t id; 207 int err; 208 209 for (id = 1; id < ISCSI_MAX_EPID; id++) { 210 dev = class_find_device(&iscsi_endpoint_class, NULL, &id, 211 iscsi_match_epid); 212 if (!dev) 213 break; 214 else 215 put_device(dev); 216 } 217 if (id == ISCSI_MAX_EPID) { 218 printk(KERN_ERR "Too many connections. Max supported %u\n", 219 ISCSI_MAX_EPID - 1); 220 return NULL; 221 } 222 223 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); 224 if (!ep) 225 return NULL; 226 227 ep->id = id; 228 ep->dev.class = &iscsi_endpoint_class; 229 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); 230 err = device_register(&ep->dev); 231 if (err) 232 goto free_ep; 233 234 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); 235 if (err) 236 goto unregister_dev; 237 238 if (dd_size) 239 ep->dd_data = &ep[1]; 240 return ep; 241 242 unregister_dev: 243 device_unregister(&ep->dev); 244 return NULL; 245 246 free_ep: 247 kfree(ep); 248 return NULL; 249 } 250 EXPORT_SYMBOL_GPL(iscsi_create_endpoint); 251 252 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) 253 { 254 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); 255 device_unregister(&ep->dev); 256 } 257 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); 258 259 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 260 { 261 struct iscsi_endpoint *ep; 262 struct device *dev; 263 264 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, 265 iscsi_match_epid); 266 if (!dev) 267 return NULL; 268 269 ep = iscsi_dev_to_endpoint(dev); 270 /* 271 * we can drop this now because the interface will prevent 272 * removals and lookups from racing. 273 */ 274 put_device(dev); 275 return ep; 276 } 277 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 278 279 /* 280 * Interface to display network param to sysfs 281 */ 282 283 static void iscsi_iface_release(struct device *dev) 284 { 285 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 286 struct device *parent = iface->dev.parent; 287 288 kfree(iface); 289 put_device(parent); 290 } 291 292 293 static struct class iscsi_iface_class = { 294 .name = "iscsi_iface", 295 .dev_release = iscsi_iface_release, 296 }; 297 298 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 299 struct device_attribute dev_attr_##_prefix##_##_name = \ 300 __ATTR(_name, _mode, _show, _store) 301 302 /* iface attrs show */ 303 #define iscsi_iface_attr_show(type, name, param_type, param) \ 304 static ssize_t \ 305 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 306 char *buf) \ 307 { \ 308 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 309 struct iscsi_transport *t = iface->transport; \ 310 return t->get_iface_param(iface, param_type, param, buf); \ 311 } \ 312 313 #define iscsi_iface_net_attr(type, name, param) \ 314 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 315 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 316 317 #define iscsi_iface_attr(type, name, param) \ 318 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 319 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 320 321 /* generic read only ipv4 attribute */ 322 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 323 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 324 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 325 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 326 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 327 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 328 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 329 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 330 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 331 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 332 iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 333 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 334 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 335 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 336 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 337 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 338 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 339 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 340 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 341 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 342 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 343 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 344 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 345 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 346 iscsi_iface_net_attr(ipv4_iface, fragment_disable, 347 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 348 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 349 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 350 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 351 352 /* generic read only ipv6 attribute */ 353 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 354 iscsi_iface_net_attr(ipv6_iface, link_local_addr, 355 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 356 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 357 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 358 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 359 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 360 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 361 iscsi_iface_net_attr(ipv6_iface, link_local_state, 362 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 363 iscsi_iface_net_attr(ipv6_iface, router_state, 364 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 365 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 366 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 367 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 368 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 369 iscsi_iface_net_attr(ipv6_iface, traffic_class, 370 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 371 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 372 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 373 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 374 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 375 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 376 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 377 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 378 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 379 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 380 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 381 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 382 383 /* common read only iface attribute */ 384 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 385 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 386 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 387 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 388 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 389 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 390 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 391 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 392 iscsi_iface_net_attr(iface, tcp_nagle_disable, 393 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 394 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 395 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 396 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 397 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 398 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 399 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 400 401 /* common iscsi specific settings attributes */ 402 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 403 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 404 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 405 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 406 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 407 iscsi_iface_attr(iface, data_seq_in_order, 408 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 409 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 410 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 411 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 412 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 413 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 414 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 415 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 416 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 417 iscsi_iface_attr(iface, discovery_auth_optional, 418 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 419 iscsi_iface_attr(iface, discovery_logout, 420 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 421 iscsi_iface_attr(iface, strict_login_comp_en, 422 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 423 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 424 425 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 426 struct attribute *attr, int i) 427 { 428 struct device *dev = container_of(kobj, struct device, kobj); 429 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 430 struct iscsi_transport *t = iface->transport; 431 int param; 432 int param_type; 433 434 if (attr == &dev_attr_iface_enabled.attr) 435 param = ISCSI_NET_PARAM_IFACE_ENABLE; 436 else if (attr == &dev_attr_iface_vlan_id.attr) 437 param = ISCSI_NET_PARAM_VLAN_ID; 438 else if (attr == &dev_attr_iface_vlan_priority.attr) 439 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 440 else if (attr == &dev_attr_iface_vlan_enabled.attr) 441 param = ISCSI_NET_PARAM_VLAN_ENABLED; 442 else if (attr == &dev_attr_iface_mtu.attr) 443 param = ISCSI_NET_PARAM_MTU; 444 else if (attr == &dev_attr_iface_port.attr) 445 param = ISCSI_NET_PARAM_PORT; 446 else if (attr == &dev_attr_iface_ipaddress_state.attr) 447 param = ISCSI_NET_PARAM_IPADDR_STATE; 448 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 449 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 450 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 451 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 452 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 453 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 454 else if (attr == &dev_attr_iface_tcp_wsf.attr) 455 param = ISCSI_NET_PARAM_TCP_WSF; 456 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 457 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 458 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 459 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 460 else if (attr == &dev_attr_iface_cache_id.attr) 461 param = ISCSI_NET_PARAM_CACHE_ID; 462 else if (attr == &dev_attr_iface_redirect_en.attr) 463 param = ISCSI_NET_PARAM_REDIRECT_EN; 464 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 465 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 466 else if (attr == &dev_attr_iface_header_digest.attr) 467 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 468 else if (attr == &dev_attr_iface_data_digest.attr) 469 param = ISCSI_IFACE_PARAM_DATADGST_EN; 470 else if (attr == &dev_attr_iface_immediate_data.attr) 471 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 472 else if (attr == &dev_attr_iface_initial_r2t.attr) 473 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 474 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 475 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 476 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 477 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 478 else if (attr == &dev_attr_iface_erl.attr) 479 param = ISCSI_IFACE_PARAM_ERL; 480 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 481 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 482 else if (attr == &dev_attr_iface_first_burst_len.attr) 483 param = ISCSI_IFACE_PARAM_FIRST_BURST; 484 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 485 param = ISCSI_IFACE_PARAM_MAX_R2T; 486 else if (attr == &dev_attr_iface_max_burst_len.attr) 487 param = ISCSI_IFACE_PARAM_MAX_BURST; 488 else if (attr == &dev_attr_iface_chap_auth.attr) 489 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 490 else if (attr == &dev_attr_iface_bidi_chap.attr) 491 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 492 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 493 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 494 else if (attr == &dev_attr_iface_discovery_logout.attr) 495 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 496 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 497 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 498 else if (attr == &dev_attr_iface_initiator_name.attr) 499 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 500 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 501 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 502 param = ISCSI_NET_PARAM_IPV4_ADDR; 503 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 504 param = ISCSI_NET_PARAM_IPV4_GW; 505 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 506 param = ISCSI_NET_PARAM_IPV4_SUBNET; 507 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 508 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 509 else if (attr == 510 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 511 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 512 else if (attr == 513 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 514 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 515 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 516 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 517 else if (attr == &dev_attr_ipv4_iface_tos.attr) 518 param = ISCSI_NET_PARAM_IPV4_TOS; 519 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 520 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 521 else if (attr == 522 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 523 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 524 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 525 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 526 else if (attr == 527 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 528 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 529 else if (attr == 530 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 531 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 532 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 533 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 534 else if (attr == 535 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 536 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 537 else if (attr == 538 &dev_attr_ipv4_iface_fragment_disable.attr) 539 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 540 else if (attr == 541 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 542 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 543 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 544 param = ISCSI_NET_PARAM_IPV4_TTL; 545 else 546 return 0; 547 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 548 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 549 param = ISCSI_NET_PARAM_IPV6_ADDR; 550 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 551 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 552 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 553 param = ISCSI_NET_PARAM_IPV6_ROUTER; 554 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 555 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 556 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 557 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 558 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 559 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 560 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 561 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 562 else if (attr == 563 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 564 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 565 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 566 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 567 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 568 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 569 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 570 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 571 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 572 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 573 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 574 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 575 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 576 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 577 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 578 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 579 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 580 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 581 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 582 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 583 else 584 return 0; 585 } else { 586 WARN_ONCE(1, "Invalid iface attr"); 587 return 0; 588 } 589 590 switch (param) { 591 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO: 592 case ISCSI_IFACE_PARAM_HDRDGST_EN: 593 case ISCSI_IFACE_PARAM_DATADGST_EN: 594 case ISCSI_IFACE_PARAM_IMM_DATA_EN: 595 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN: 596 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN: 597 case ISCSI_IFACE_PARAM_PDU_INORDER_EN: 598 case ISCSI_IFACE_PARAM_ERL: 599 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH: 600 case ISCSI_IFACE_PARAM_FIRST_BURST: 601 case ISCSI_IFACE_PARAM_MAX_R2T: 602 case ISCSI_IFACE_PARAM_MAX_BURST: 603 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN: 604 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN: 605 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL: 606 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN: 607 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN: 608 case ISCSI_IFACE_PARAM_INITIATOR_NAME: 609 param_type = ISCSI_IFACE_PARAM; 610 break; 611 default: 612 param_type = ISCSI_NET_PARAM; 613 } 614 615 return t->attr_is_visible(param_type, param); 616 } 617 618 static struct attribute *iscsi_iface_attrs[] = { 619 &dev_attr_iface_enabled.attr, 620 &dev_attr_iface_vlan_id.attr, 621 &dev_attr_iface_vlan_priority.attr, 622 &dev_attr_iface_vlan_enabled.attr, 623 &dev_attr_ipv4_iface_ipaddress.attr, 624 &dev_attr_ipv4_iface_gateway.attr, 625 &dev_attr_ipv4_iface_subnet.attr, 626 &dev_attr_ipv4_iface_bootproto.attr, 627 &dev_attr_ipv6_iface_ipaddress.attr, 628 &dev_attr_ipv6_iface_link_local_addr.attr, 629 &dev_attr_ipv6_iface_router_addr.attr, 630 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 631 &dev_attr_ipv6_iface_link_local_autocfg.attr, 632 &dev_attr_iface_mtu.attr, 633 &dev_attr_iface_port.attr, 634 &dev_attr_iface_ipaddress_state.attr, 635 &dev_attr_iface_delayed_ack_en.attr, 636 &dev_attr_iface_tcp_nagle_disable.attr, 637 &dev_attr_iface_tcp_wsf_disable.attr, 638 &dev_attr_iface_tcp_wsf.attr, 639 &dev_attr_iface_tcp_timer_scale.attr, 640 &dev_attr_iface_tcp_timestamp_en.attr, 641 &dev_attr_iface_cache_id.attr, 642 &dev_attr_iface_redirect_en.attr, 643 &dev_attr_iface_def_taskmgmt_tmo.attr, 644 &dev_attr_iface_header_digest.attr, 645 &dev_attr_iface_data_digest.attr, 646 &dev_attr_iface_immediate_data.attr, 647 &dev_attr_iface_initial_r2t.attr, 648 &dev_attr_iface_data_seq_in_order.attr, 649 &dev_attr_iface_data_pdu_in_order.attr, 650 &dev_attr_iface_erl.attr, 651 &dev_attr_iface_max_recv_dlength.attr, 652 &dev_attr_iface_first_burst_len.attr, 653 &dev_attr_iface_max_outstanding_r2t.attr, 654 &dev_attr_iface_max_burst_len.attr, 655 &dev_attr_iface_chap_auth.attr, 656 &dev_attr_iface_bidi_chap.attr, 657 &dev_attr_iface_discovery_auth_optional.attr, 658 &dev_attr_iface_discovery_logout.attr, 659 &dev_attr_iface_strict_login_comp_en.attr, 660 &dev_attr_iface_initiator_name.attr, 661 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 662 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 663 &dev_attr_ipv4_iface_tos_en.attr, 664 &dev_attr_ipv4_iface_tos.attr, 665 &dev_attr_ipv4_iface_grat_arp_en.attr, 666 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 667 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 668 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 669 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 670 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 671 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 672 &dev_attr_ipv4_iface_fragment_disable.attr, 673 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 674 &dev_attr_ipv4_iface_ttl.attr, 675 &dev_attr_ipv6_iface_link_local_state.attr, 676 &dev_attr_ipv6_iface_router_state.attr, 677 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 678 &dev_attr_ipv6_iface_mld_en.attr, 679 &dev_attr_ipv6_iface_flow_label.attr, 680 &dev_attr_ipv6_iface_traffic_class.attr, 681 &dev_attr_ipv6_iface_hop_limit.attr, 682 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 683 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 684 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 685 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 686 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 687 NULL, 688 }; 689 690 static struct attribute_group iscsi_iface_group = { 691 .attrs = iscsi_iface_attrs, 692 .is_visible = iscsi_iface_attr_is_visible, 693 }; 694 695 /* convert iscsi_ipaddress_state values to ascii string name */ 696 static const struct { 697 enum iscsi_ipaddress_state value; 698 char *name; 699 } iscsi_ipaddress_state_names[] = { 700 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 701 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 702 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 703 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 704 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 705 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 706 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 707 }; 708 709 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 710 { 711 int i; 712 char *state = NULL; 713 714 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 715 if (iscsi_ipaddress_state_names[i].value == port_state) { 716 state = iscsi_ipaddress_state_names[i].name; 717 break; 718 } 719 } 720 return state; 721 } 722 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 723 724 /* convert iscsi_router_state values to ascii string name */ 725 static const struct { 726 enum iscsi_router_state value; 727 char *name; 728 } iscsi_router_state_names[] = { 729 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 730 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 731 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 732 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 733 }; 734 735 char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 736 { 737 int i; 738 char *state = NULL; 739 740 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 741 if (iscsi_router_state_names[i].value == router_state) { 742 state = iscsi_router_state_names[i].name; 743 break; 744 } 745 } 746 return state; 747 } 748 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 749 750 struct iscsi_iface * 751 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 752 uint32_t iface_type, uint32_t iface_num, int dd_size) 753 { 754 struct iscsi_iface *iface; 755 int err; 756 757 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 758 if (!iface) 759 return NULL; 760 761 iface->transport = transport; 762 iface->iface_type = iface_type; 763 iface->iface_num = iface_num; 764 iface->dev.release = iscsi_iface_release; 765 iface->dev.class = &iscsi_iface_class; 766 /* parent reference released in iscsi_iface_release */ 767 iface->dev.parent = get_device(&shost->shost_gendev); 768 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 769 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 770 iface_num); 771 else 772 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 773 iface_num); 774 775 err = device_register(&iface->dev); 776 if (err) 777 goto free_iface; 778 779 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 780 if (err) 781 goto unreg_iface; 782 783 if (dd_size) 784 iface->dd_data = &iface[1]; 785 return iface; 786 787 unreg_iface: 788 device_unregister(&iface->dev); 789 return NULL; 790 791 free_iface: 792 put_device(iface->dev.parent); 793 kfree(iface); 794 return NULL; 795 } 796 EXPORT_SYMBOL_GPL(iscsi_create_iface); 797 798 void iscsi_destroy_iface(struct iscsi_iface *iface) 799 { 800 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 801 device_unregister(&iface->dev); 802 } 803 EXPORT_SYMBOL_GPL(iscsi_destroy_iface); 804 805 /* 806 * Interface to display flash node params to sysfs 807 */ 808 809 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ 810 struct device_attribute dev_attr_##_prefix##_##_name = \ 811 __ATTR(_name, _mode, _show, _store) 812 813 /* flash node session attrs show */ 814 #define iscsi_flashnode_sess_attr_show(type, name, param) \ 815 static ssize_t \ 816 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 817 char *buf) \ 818 { \ 819 struct iscsi_bus_flash_session *fnode_sess = \ 820 iscsi_dev_to_flash_session(dev);\ 821 struct iscsi_transport *t = fnode_sess->transport; \ 822 return t->get_flashnode_param(fnode_sess, param, buf); \ 823 } \ 824 825 826 #define iscsi_flashnode_sess_attr(type, name, param) \ 827 iscsi_flashnode_sess_attr_show(type, name, param) \ 828 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 829 show_##type##_##name, NULL); 830 831 /* Flash node session attributes */ 832 833 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 834 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 835 iscsi_flashnode_sess_attr(fnode, discovery_session, 836 ISCSI_FLASHNODE_DISCOVERY_SESS); 837 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 838 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 839 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 840 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 841 iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 842 ISCSI_FLASHNODE_DATASEQ_INORDER); 843 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 844 ISCSI_FLASHNODE_PDU_INORDER); 845 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 846 iscsi_flashnode_sess_attr(fnode, discovery_logout, 847 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 848 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 849 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 850 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 851 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 852 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 853 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 854 iscsi_flashnode_sess_attr(fnode, def_time2retain, 855 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 856 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 857 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 858 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 859 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 860 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 861 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 862 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 863 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 864 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 865 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 866 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 867 iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 868 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 869 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 870 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 871 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 872 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 873 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 874 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 875 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 876 877 static struct attribute *iscsi_flashnode_sess_attrs[] = { 878 &dev_attr_fnode_auto_snd_tgt_disable.attr, 879 &dev_attr_fnode_discovery_session.attr, 880 &dev_attr_fnode_portal_type.attr, 881 &dev_attr_fnode_entry_enable.attr, 882 &dev_attr_fnode_immediate_data.attr, 883 &dev_attr_fnode_initial_r2t.attr, 884 &dev_attr_fnode_data_seq_in_order.attr, 885 &dev_attr_fnode_data_pdu_in_order.attr, 886 &dev_attr_fnode_chap_auth.attr, 887 &dev_attr_fnode_discovery_logout.attr, 888 &dev_attr_fnode_bidi_chap.attr, 889 &dev_attr_fnode_discovery_auth_optional.attr, 890 &dev_attr_fnode_erl.attr, 891 &dev_attr_fnode_first_burst_len.attr, 892 &dev_attr_fnode_def_time2wait.attr, 893 &dev_attr_fnode_def_time2retain.attr, 894 &dev_attr_fnode_max_outstanding_r2t.attr, 895 &dev_attr_fnode_isid.attr, 896 &dev_attr_fnode_tsid.attr, 897 &dev_attr_fnode_max_burst_len.attr, 898 &dev_attr_fnode_def_taskmgmt_tmo.attr, 899 &dev_attr_fnode_targetalias.attr, 900 &dev_attr_fnode_targetname.attr, 901 &dev_attr_fnode_tpgt.attr, 902 &dev_attr_fnode_discovery_parent_idx.attr, 903 &dev_attr_fnode_discovery_parent_type.attr, 904 &dev_attr_fnode_chap_in_idx.attr, 905 &dev_attr_fnode_chap_out_idx.attr, 906 &dev_attr_fnode_username.attr, 907 &dev_attr_fnode_username_in.attr, 908 &dev_attr_fnode_password.attr, 909 &dev_attr_fnode_password_in.attr, 910 &dev_attr_fnode_is_boot_target.attr, 911 NULL, 912 }; 913 914 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, 915 struct attribute *attr, 916 int i) 917 { 918 struct device *dev = container_of(kobj, struct device, kobj); 919 struct iscsi_bus_flash_session *fnode_sess = 920 iscsi_dev_to_flash_session(dev); 921 struct iscsi_transport *t = fnode_sess->transport; 922 int param; 923 924 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { 925 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; 926 } else if (attr == &dev_attr_fnode_discovery_session.attr) { 927 param = ISCSI_FLASHNODE_DISCOVERY_SESS; 928 } else if (attr == &dev_attr_fnode_portal_type.attr) { 929 param = ISCSI_FLASHNODE_PORTAL_TYPE; 930 } else if (attr == &dev_attr_fnode_entry_enable.attr) { 931 param = ISCSI_FLASHNODE_ENTRY_EN; 932 } else if (attr == &dev_attr_fnode_immediate_data.attr) { 933 param = ISCSI_FLASHNODE_IMM_DATA_EN; 934 } else if (attr == &dev_attr_fnode_initial_r2t.attr) { 935 param = ISCSI_FLASHNODE_INITIAL_R2T_EN; 936 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { 937 param = ISCSI_FLASHNODE_DATASEQ_INORDER; 938 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { 939 param = ISCSI_FLASHNODE_PDU_INORDER; 940 } else if (attr == &dev_attr_fnode_chap_auth.attr) { 941 param = ISCSI_FLASHNODE_CHAP_AUTH_EN; 942 } else if (attr == &dev_attr_fnode_discovery_logout.attr) { 943 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; 944 } else if (attr == &dev_attr_fnode_bidi_chap.attr) { 945 param = ISCSI_FLASHNODE_BIDI_CHAP_EN; 946 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { 947 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; 948 } else if (attr == &dev_attr_fnode_erl.attr) { 949 param = ISCSI_FLASHNODE_ERL; 950 } else if (attr == &dev_attr_fnode_first_burst_len.attr) { 951 param = ISCSI_FLASHNODE_FIRST_BURST; 952 } else if (attr == &dev_attr_fnode_def_time2wait.attr) { 953 param = ISCSI_FLASHNODE_DEF_TIME2WAIT; 954 } else if (attr == &dev_attr_fnode_def_time2retain.attr) { 955 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; 956 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { 957 param = ISCSI_FLASHNODE_MAX_R2T; 958 } else if (attr == &dev_attr_fnode_isid.attr) { 959 param = ISCSI_FLASHNODE_ISID; 960 } else if (attr == &dev_attr_fnode_tsid.attr) { 961 param = ISCSI_FLASHNODE_TSID; 962 } else if (attr == &dev_attr_fnode_max_burst_len.attr) { 963 param = ISCSI_FLASHNODE_MAX_BURST; 964 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { 965 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; 966 } else if (attr == &dev_attr_fnode_targetalias.attr) { 967 param = ISCSI_FLASHNODE_ALIAS; 968 } else if (attr == &dev_attr_fnode_targetname.attr) { 969 param = ISCSI_FLASHNODE_NAME; 970 } else if (attr == &dev_attr_fnode_tpgt.attr) { 971 param = ISCSI_FLASHNODE_TPGT; 972 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { 973 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; 974 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { 975 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; 976 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { 977 param = ISCSI_FLASHNODE_CHAP_IN_IDX; 978 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { 979 param = ISCSI_FLASHNODE_CHAP_OUT_IDX; 980 } else if (attr == &dev_attr_fnode_username.attr) { 981 param = ISCSI_FLASHNODE_USERNAME; 982 } else if (attr == &dev_attr_fnode_username_in.attr) { 983 param = ISCSI_FLASHNODE_USERNAME_IN; 984 } else if (attr == &dev_attr_fnode_password.attr) { 985 param = ISCSI_FLASHNODE_PASSWORD; 986 } else if (attr == &dev_attr_fnode_password_in.attr) { 987 param = ISCSI_FLASHNODE_PASSWORD_IN; 988 } else if (attr == &dev_attr_fnode_is_boot_target.attr) { 989 param = ISCSI_FLASHNODE_IS_BOOT_TGT; 990 } else { 991 WARN_ONCE(1, "Invalid flashnode session attr"); 992 return 0; 993 } 994 995 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 996 } 997 998 static struct attribute_group iscsi_flashnode_sess_attr_group = { 999 .attrs = iscsi_flashnode_sess_attrs, 1000 .is_visible = iscsi_flashnode_sess_attr_is_visible, 1001 }; 1002 1003 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 1004 &iscsi_flashnode_sess_attr_group, 1005 NULL, 1006 }; 1007 1008 static void iscsi_flashnode_sess_release(struct device *dev) 1009 { 1010 struct iscsi_bus_flash_session *fnode_sess = 1011 iscsi_dev_to_flash_session(dev); 1012 1013 kfree(fnode_sess->targetname); 1014 kfree(fnode_sess->targetalias); 1015 kfree(fnode_sess->portal_type); 1016 kfree(fnode_sess); 1017 } 1018 1019 static const struct device_type iscsi_flashnode_sess_dev_type = { 1020 .name = "iscsi_flashnode_sess_dev_type", 1021 .groups = iscsi_flashnode_sess_attr_groups, 1022 .release = iscsi_flashnode_sess_release, 1023 }; 1024 1025 /* flash node connection attrs show */ 1026 #define iscsi_flashnode_conn_attr_show(type, name, param) \ 1027 static ssize_t \ 1028 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 1029 char *buf) \ 1030 { \ 1031 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ 1032 struct iscsi_bus_flash_session *fnode_sess = \ 1033 iscsi_flash_conn_to_flash_session(fnode_conn);\ 1034 struct iscsi_transport *t = fnode_conn->transport; \ 1035 return t->get_flashnode_param(fnode_sess, param, buf); \ 1036 } \ 1037 1038 1039 #define iscsi_flashnode_conn_attr(type, name, param) \ 1040 iscsi_flashnode_conn_attr_show(type, name, param) \ 1041 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1042 show_##type##_##name, NULL); 1043 1044 /* Flash node connection attributes */ 1045 1046 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1047 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1048 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1049 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1050 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1051 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1052 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1053 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1054 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1055 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1056 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1057 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1058 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1059 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1060 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1061 iscsi_flashnode_conn_attr(fnode, fragment_disable, 1062 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1063 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1064 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1065 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1066 iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1067 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1068 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1069 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1070 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1071 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1072 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1073 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1074 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1075 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1076 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1077 iscsi_flashnode_conn_attr(fnode, max_segment_size, 1078 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1079 iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1080 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1081 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1082 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1083 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1084 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1085 1086 static struct attribute *iscsi_flashnode_conn_attrs[] = { 1087 &dev_attr_fnode_is_fw_assigned_ipv6.attr, 1088 &dev_attr_fnode_header_digest.attr, 1089 &dev_attr_fnode_data_digest.attr, 1090 &dev_attr_fnode_snack_req.attr, 1091 &dev_attr_fnode_tcp_timestamp_stat.attr, 1092 &dev_attr_fnode_tcp_nagle_disable.attr, 1093 &dev_attr_fnode_tcp_wsf_disable.attr, 1094 &dev_attr_fnode_tcp_timer_scale.attr, 1095 &dev_attr_fnode_tcp_timestamp_enable.attr, 1096 &dev_attr_fnode_fragment_disable.attr, 1097 &dev_attr_fnode_max_recv_dlength.attr, 1098 &dev_attr_fnode_max_xmit_dlength.attr, 1099 &dev_attr_fnode_keepalive_tmo.attr, 1100 &dev_attr_fnode_port.attr, 1101 &dev_attr_fnode_ipaddress.attr, 1102 &dev_attr_fnode_redirect_ipaddr.attr, 1103 &dev_attr_fnode_max_segment_size.attr, 1104 &dev_attr_fnode_local_port.attr, 1105 &dev_attr_fnode_ipv4_tos.attr, 1106 &dev_attr_fnode_ipv6_traffic_class.attr, 1107 &dev_attr_fnode_ipv6_flow_label.attr, 1108 &dev_attr_fnode_link_local_ipv6.attr, 1109 &dev_attr_fnode_tcp_xmit_wsf.attr, 1110 &dev_attr_fnode_tcp_recv_wsf.attr, 1111 &dev_attr_fnode_statsn.attr, 1112 &dev_attr_fnode_exp_statsn.attr, 1113 NULL, 1114 }; 1115 1116 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, 1117 struct attribute *attr, 1118 int i) 1119 { 1120 struct device *dev = container_of(kobj, struct device, kobj); 1121 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1122 struct iscsi_transport *t = fnode_conn->transport; 1123 int param; 1124 1125 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { 1126 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; 1127 } else if (attr == &dev_attr_fnode_header_digest.attr) { 1128 param = ISCSI_FLASHNODE_HDR_DGST_EN; 1129 } else if (attr == &dev_attr_fnode_data_digest.attr) { 1130 param = ISCSI_FLASHNODE_DATA_DGST_EN; 1131 } else if (attr == &dev_attr_fnode_snack_req.attr) { 1132 param = ISCSI_FLASHNODE_SNACK_REQ_EN; 1133 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { 1134 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; 1135 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { 1136 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; 1137 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { 1138 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; 1139 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { 1140 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; 1141 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { 1142 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; 1143 } else if (attr == &dev_attr_fnode_fragment_disable.attr) { 1144 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; 1145 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { 1146 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; 1147 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { 1148 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; 1149 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { 1150 param = ISCSI_FLASHNODE_KEEPALIVE_TMO; 1151 } else if (attr == &dev_attr_fnode_port.attr) { 1152 param = ISCSI_FLASHNODE_PORT; 1153 } else if (attr == &dev_attr_fnode_ipaddress.attr) { 1154 param = ISCSI_FLASHNODE_IPADDR; 1155 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { 1156 param = ISCSI_FLASHNODE_REDIRECT_IPADDR; 1157 } else if (attr == &dev_attr_fnode_max_segment_size.attr) { 1158 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; 1159 } else if (attr == &dev_attr_fnode_local_port.attr) { 1160 param = ISCSI_FLASHNODE_LOCAL_PORT; 1161 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { 1162 param = ISCSI_FLASHNODE_IPV4_TOS; 1163 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { 1164 param = ISCSI_FLASHNODE_IPV6_TC; 1165 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { 1166 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; 1167 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { 1168 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; 1169 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { 1170 param = ISCSI_FLASHNODE_TCP_XMIT_WSF; 1171 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { 1172 param = ISCSI_FLASHNODE_TCP_RECV_WSF; 1173 } else if (attr == &dev_attr_fnode_statsn.attr) { 1174 param = ISCSI_FLASHNODE_STATSN; 1175 } else if (attr == &dev_attr_fnode_exp_statsn.attr) { 1176 param = ISCSI_FLASHNODE_EXP_STATSN; 1177 } else { 1178 WARN_ONCE(1, "Invalid flashnode connection attr"); 1179 return 0; 1180 } 1181 1182 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1183 } 1184 1185 static struct attribute_group iscsi_flashnode_conn_attr_group = { 1186 .attrs = iscsi_flashnode_conn_attrs, 1187 .is_visible = iscsi_flashnode_conn_attr_is_visible, 1188 }; 1189 1190 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1191 &iscsi_flashnode_conn_attr_group, 1192 NULL, 1193 }; 1194 1195 static void iscsi_flashnode_conn_release(struct device *dev) 1196 { 1197 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1198 1199 kfree(fnode_conn->ipaddress); 1200 kfree(fnode_conn->redirect_ipaddr); 1201 kfree(fnode_conn->link_local_ipv6_addr); 1202 kfree(fnode_conn); 1203 } 1204 1205 static const struct device_type iscsi_flashnode_conn_dev_type = { 1206 .name = "iscsi_flashnode_conn_dev_type", 1207 .groups = iscsi_flashnode_conn_attr_groups, 1208 .release = iscsi_flashnode_conn_release, 1209 }; 1210 1211 static struct bus_type iscsi_flashnode_bus; 1212 1213 int iscsi_flashnode_bus_match(struct device *dev, 1214 struct device_driver *drv) 1215 { 1216 if (dev->bus == &iscsi_flashnode_bus) 1217 return 1; 1218 return 0; 1219 } 1220 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1221 1222 static struct bus_type iscsi_flashnode_bus = { 1223 .name = "iscsi_flashnode", 1224 .match = &iscsi_flashnode_bus_match, 1225 }; 1226 1227 /** 1228 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs 1229 * @shost: pointer to host data 1230 * @index: index of flashnode to add in sysfs 1231 * @transport: pointer to transport data 1232 * @dd_size: total size to allocate 1233 * 1234 * Adds a sysfs entry for the flashnode session attributes 1235 * 1236 * Returns: 1237 * pointer to allocated flashnode sess on success 1238 * %NULL on failure 1239 */ 1240 struct iscsi_bus_flash_session * 1241 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, 1242 struct iscsi_transport *transport, 1243 int dd_size) 1244 { 1245 struct iscsi_bus_flash_session *fnode_sess; 1246 int err; 1247 1248 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); 1249 if (!fnode_sess) 1250 return NULL; 1251 1252 fnode_sess->transport = transport; 1253 fnode_sess->target_id = index; 1254 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; 1255 fnode_sess->dev.bus = &iscsi_flashnode_bus; 1256 fnode_sess->dev.parent = &shost->shost_gendev; 1257 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", 1258 shost->host_no, index); 1259 1260 err = device_register(&fnode_sess->dev); 1261 if (err) 1262 goto free_fnode_sess; 1263 1264 if (dd_size) 1265 fnode_sess->dd_data = &fnode_sess[1]; 1266 1267 return fnode_sess; 1268 1269 free_fnode_sess: 1270 kfree(fnode_sess); 1271 return NULL; 1272 } 1273 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); 1274 1275 /** 1276 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs 1277 * @shost: pointer to host data 1278 * @fnode_sess: pointer to the parent flashnode session entry 1279 * @transport: pointer to transport data 1280 * @dd_size: total size to allocate 1281 * 1282 * Adds a sysfs entry for the flashnode connection attributes 1283 * 1284 * Returns: 1285 * pointer to allocated flashnode conn on success 1286 * %NULL on failure 1287 */ 1288 struct iscsi_bus_flash_conn * 1289 iscsi_create_flashnode_conn(struct Scsi_Host *shost, 1290 struct iscsi_bus_flash_session *fnode_sess, 1291 struct iscsi_transport *transport, 1292 int dd_size) 1293 { 1294 struct iscsi_bus_flash_conn *fnode_conn; 1295 int err; 1296 1297 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); 1298 if (!fnode_conn) 1299 return NULL; 1300 1301 fnode_conn->transport = transport; 1302 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; 1303 fnode_conn->dev.bus = &iscsi_flashnode_bus; 1304 fnode_conn->dev.parent = &fnode_sess->dev; 1305 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", 1306 shost->host_no, fnode_sess->target_id); 1307 1308 err = device_register(&fnode_conn->dev); 1309 if (err) 1310 goto free_fnode_conn; 1311 1312 if (dd_size) 1313 fnode_conn->dd_data = &fnode_conn[1]; 1314 1315 return fnode_conn; 1316 1317 free_fnode_conn: 1318 kfree(fnode_conn); 1319 return NULL; 1320 } 1321 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); 1322 1323 /** 1324 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn 1325 * @dev: device to verify 1326 * @data: pointer to data containing value to use for verification 1327 * 1328 * Verifies if the passed device is flashnode conn device 1329 * 1330 * Returns: 1331 * 1 on success 1332 * 0 on failure 1333 */ 1334 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1335 { 1336 return dev->bus == &iscsi_flashnode_bus; 1337 } 1338 1339 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1340 { 1341 device_unregister(&fnode_conn->dev); 1342 return 0; 1343 } 1344 1345 static int flashnode_match_index(struct device *dev, void *data) 1346 { 1347 struct iscsi_bus_flash_session *fnode_sess = NULL; 1348 int ret = 0; 1349 1350 if (!iscsi_flashnode_bus_match(dev, NULL)) 1351 goto exit_match_index; 1352 1353 fnode_sess = iscsi_dev_to_flash_session(dev); 1354 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1355 1356 exit_match_index: 1357 return ret; 1358 } 1359 1360 /** 1361 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1362 * @shost: pointer to host data 1363 * @idx: index to match 1364 * 1365 * Finds the flashnode session object for the passed index 1366 * 1367 * Returns: 1368 * pointer to found flashnode session object on success 1369 * %NULL on failure 1370 */ 1371 static struct iscsi_bus_flash_session * 1372 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1373 { 1374 struct iscsi_bus_flash_session *fnode_sess = NULL; 1375 struct device *dev; 1376 1377 dev = device_find_child(&shost->shost_gendev, &idx, 1378 flashnode_match_index); 1379 if (dev) 1380 fnode_sess = iscsi_dev_to_flash_session(dev); 1381 1382 return fnode_sess; 1383 } 1384 1385 /** 1386 * iscsi_find_flashnode_sess - finds flashnode session entry 1387 * @shost: pointer to host data 1388 * @data: pointer to data containing value to use for comparison 1389 * @fn: function pointer that does actual comparison 1390 * 1391 * Finds the flashnode session object comparing the data passed using logic 1392 * defined in passed function pointer 1393 * 1394 * Returns: 1395 * pointer to found flashnode session device object on success 1396 * %NULL on failure 1397 */ 1398 struct device * 1399 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1400 int (*fn)(struct device *dev, void *data)) 1401 { 1402 return device_find_child(&shost->shost_gendev, data, fn); 1403 } 1404 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1405 1406 /** 1407 * iscsi_find_flashnode_conn - finds flashnode connection entry 1408 * @fnode_sess: pointer to parent flashnode session entry 1409 * 1410 * Finds the flashnode connection object comparing the data passed using logic 1411 * defined in passed function pointer 1412 * 1413 * Returns: 1414 * pointer to found flashnode connection device object on success 1415 * %NULL on failure 1416 */ 1417 struct device * 1418 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1419 { 1420 return device_find_child(&fnode_sess->dev, NULL, 1421 iscsi_is_flashnode_conn_dev); 1422 } 1423 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1424 1425 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1426 { 1427 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1428 return 0; 1429 1430 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1431 } 1432 1433 /** 1434 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1435 * @fnode_sess: pointer to flashnode session entry to be destroyed 1436 * 1437 * Deletes the flashnode session entry and all children flashnode connection 1438 * entries from sysfs 1439 */ 1440 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1441 { 1442 int err; 1443 1444 err = device_for_each_child(&fnode_sess->dev, NULL, 1445 iscsi_iter_destroy_flashnode_conn_fn); 1446 if (err) 1447 pr_err("Could not delete all connections for %s. Error %d.\n", 1448 fnode_sess->dev.kobj.name, err); 1449 1450 device_unregister(&fnode_sess->dev); 1451 } 1452 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1453 1454 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1455 { 1456 if (!iscsi_flashnode_bus_match(dev, NULL)) 1457 return 0; 1458 1459 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1460 return 0; 1461 } 1462 1463 /** 1464 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1465 * @shost: pointer to host data 1466 * 1467 * Destroys all the flashnode session entries and all corresponding children 1468 * flashnode connection entries from sysfs 1469 */ 1470 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1471 { 1472 device_for_each_child(&shost->shost_gendev, NULL, 1473 iscsi_iter_destroy_flashnode_fn); 1474 } 1475 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1476 1477 /* 1478 * BSG support 1479 */ 1480 /** 1481 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1482 * @job: bsg job to be processed 1483 */ 1484 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1485 { 1486 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1487 struct iscsi_bsg_request *req = job->request; 1488 struct iscsi_bsg_reply *reply = job->reply; 1489 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1490 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1491 int ret; 1492 1493 /* check if we have the msgcode value at least */ 1494 if (job->request_len < sizeof(uint32_t)) { 1495 ret = -ENOMSG; 1496 goto fail_host_msg; 1497 } 1498 1499 /* Validate the host command */ 1500 switch (req->msgcode) { 1501 case ISCSI_BSG_HST_VENDOR: 1502 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1503 if ((shost->hostt->vendor_id == 0L) || 1504 (req->rqst_data.h_vendor.vendor_id != 1505 shost->hostt->vendor_id)) { 1506 ret = -ESRCH; 1507 goto fail_host_msg; 1508 } 1509 break; 1510 default: 1511 ret = -EBADR; 1512 goto fail_host_msg; 1513 } 1514 1515 /* check if we really have all the request data needed */ 1516 if (job->request_len < cmdlen) { 1517 ret = -ENOMSG; 1518 goto fail_host_msg; 1519 } 1520 1521 ret = i->iscsi_transport->bsg_request(job); 1522 if (!ret) 1523 return 0; 1524 1525 fail_host_msg: 1526 /* return the errno failure code as the only status */ 1527 BUG_ON(job->reply_len < sizeof(uint32_t)); 1528 reply->reply_payload_rcv_len = 0; 1529 reply->result = ret; 1530 job->reply_len = sizeof(uint32_t); 1531 bsg_job_done(job, ret, 0); 1532 return 0; 1533 } 1534 1535 /** 1536 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1537 * @shost: shost for iscsi_host 1538 * @ihost: iscsi_cls_host adding the structures to 1539 */ 1540 static int 1541 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1542 { 1543 struct device *dev = &shost->shost_gendev; 1544 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1545 struct request_queue *q; 1546 char bsg_name[20]; 1547 1548 if (!i->iscsi_transport->bsg_request) 1549 return -ENOTSUPP; 1550 1551 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1552 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1553 if (IS_ERR(q)) { 1554 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1555 "initialize - no request queue\n"); 1556 return PTR_ERR(q); 1557 } 1558 __scsi_init_queue(shost, q); 1559 1560 ihost->bsg_q = q; 1561 return 0; 1562 } 1563 1564 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1565 struct device *cdev) 1566 { 1567 struct Scsi_Host *shost = dev_to_shost(dev); 1568 struct iscsi_cls_host *ihost = shost->shost_data; 1569 1570 memset(ihost, 0, sizeof(*ihost)); 1571 atomic_set(&ihost->nr_scans, 0); 1572 mutex_init(&ihost->mutex); 1573 1574 iscsi_bsg_host_add(shost, ihost); 1575 /* ignore any bsg add error - we just can't do sgio */ 1576 1577 return 0; 1578 } 1579 1580 static int iscsi_remove_host(struct transport_container *tc, 1581 struct device *dev, struct device *cdev) 1582 { 1583 struct Scsi_Host *shost = dev_to_shost(dev); 1584 struct iscsi_cls_host *ihost = shost->shost_data; 1585 1586 bsg_remove_queue(ihost->bsg_q); 1587 return 0; 1588 } 1589 1590 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1591 "iscsi_host", 1592 iscsi_setup_host, 1593 iscsi_remove_host, 1594 NULL); 1595 1596 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1597 "iscsi_session", 1598 NULL, 1599 NULL, 1600 NULL); 1601 1602 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1603 "iscsi_connection", 1604 NULL, 1605 NULL, 1606 NULL); 1607 1608 static struct sock *nls; 1609 static DEFINE_MUTEX(rx_queue_mutex); 1610 1611 static LIST_HEAD(sesslist); 1612 static DEFINE_SPINLOCK(sesslock); 1613 static LIST_HEAD(connlist); 1614 static DEFINE_SPINLOCK(connlock); 1615 1616 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1617 { 1618 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1619 return sess->sid; 1620 } 1621 1622 /* 1623 * Returns the matching session to a given sid 1624 */ 1625 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1626 { 1627 unsigned long flags; 1628 struct iscsi_cls_session *sess; 1629 1630 spin_lock_irqsave(&sesslock, flags); 1631 list_for_each_entry(sess, &sesslist, sess_list) { 1632 if (sess->sid == sid) { 1633 spin_unlock_irqrestore(&sesslock, flags); 1634 return sess; 1635 } 1636 } 1637 spin_unlock_irqrestore(&sesslock, flags); 1638 return NULL; 1639 } 1640 1641 /* 1642 * Returns the matching connection to a given sid / cid tuple 1643 */ 1644 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1645 { 1646 unsigned long flags; 1647 struct iscsi_cls_conn *conn; 1648 1649 spin_lock_irqsave(&connlock, flags); 1650 list_for_each_entry(conn, &connlist, conn_list) { 1651 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1652 spin_unlock_irqrestore(&connlock, flags); 1653 return conn; 1654 } 1655 } 1656 spin_unlock_irqrestore(&connlock, flags); 1657 return NULL; 1658 } 1659 1660 /* 1661 * The following functions can be used by LLDs that allocate 1662 * their own scsi_hosts or by software iscsi LLDs 1663 */ 1664 static struct { 1665 int value; 1666 char *name; 1667 } iscsi_session_state_names[] = { 1668 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1669 { ISCSI_SESSION_FAILED, "FAILED" }, 1670 { ISCSI_SESSION_FREE, "FREE" }, 1671 }; 1672 1673 static const char *iscsi_session_state_name(int state) 1674 { 1675 int i; 1676 char *name = NULL; 1677 1678 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1679 if (iscsi_session_state_names[i].value == state) { 1680 name = iscsi_session_state_names[i].name; 1681 break; 1682 } 1683 } 1684 return name; 1685 } 1686 1687 int iscsi_session_chkready(struct iscsi_cls_session *session) 1688 { 1689 unsigned long flags; 1690 int err; 1691 1692 spin_lock_irqsave(&session->lock, flags); 1693 switch (session->state) { 1694 case ISCSI_SESSION_LOGGED_IN: 1695 err = 0; 1696 break; 1697 case ISCSI_SESSION_FAILED: 1698 err = DID_IMM_RETRY << 16; 1699 break; 1700 case ISCSI_SESSION_FREE: 1701 err = DID_TRANSPORT_FAILFAST << 16; 1702 break; 1703 default: 1704 err = DID_NO_CONNECT << 16; 1705 break; 1706 } 1707 spin_unlock_irqrestore(&session->lock, flags); 1708 return err; 1709 } 1710 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1711 1712 int iscsi_is_session_online(struct iscsi_cls_session *session) 1713 { 1714 unsigned long flags; 1715 int ret = 0; 1716 1717 spin_lock_irqsave(&session->lock, flags); 1718 if (session->state == ISCSI_SESSION_LOGGED_IN) 1719 ret = 1; 1720 spin_unlock_irqrestore(&session->lock, flags); 1721 return ret; 1722 } 1723 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1724 1725 static void iscsi_session_release(struct device *dev) 1726 { 1727 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1728 struct Scsi_Host *shost; 1729 1730 shost = iscsi_session_to_shost(session); 1731 scsi_host_put(shost); 1732 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1733 kfree(session); 1734 } 1735 1736 int iscsi_is_session_dev(const struct device *dev) 1737 { 1738 return dev->release == iscsi_session_release; 1739 } 1740 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1741 1742 static int iscsi_iter_session_fn(struct device *dev, void *data) 1743 { 1744 void (* fn) (struct iscsi_cls_session *) = data; 1745 1746 if (!iscsi_is_session_dev(dev)) 1747 return 0; 1748 fn(iscsi_dev_to_session(dev)); 1749 return 0; 1750 } 1751 1752 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1753 void (*fn)(struct iscsi_cls_session *)) 1754 { 1755 device_for_each_child(&shost->shost_gendev, fn, 1756 iscsi_iter_session_fn); 1757 } 1758 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1759 1760 /** 1761 * iscsi_scan_finished - helper to report when running scans are done 1762 * @shost: scsi host 1763 * @time: scan run time 1764 * 1765 * This function can be used by drives like qla4xxx to report to the scsi 1766 * layer when the scans it kicked off at module load time are done. 1767 */ 1768 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) 1769 { 1770 struct iscsi_cls_host *ihost = shost->shost_data; 1771 /* 1772 * qla4xxx will have kicked off some session unblocks before calling 1773 * scsi_scan_host, so just wait for them to complete. 1774 */ 1775 return !atomic_read(&ihost->nr_scans); 1776 } 1777 EXPORT_SYMBOL_GPL(iscsi_scan_finished); 1778 1779 struct iscsi_scan_data { 1780 unsigned int channel; 1781 unsigned int id; 1782 u64 lun; 1783 enum scsi_scan_mode rescan; 1784 }; 1785 1786 static int iscsi_user_scan_session(struct device *dev, void *data) 1787 { 1788 struct iscsi_scan_data *scan_data = data; 1789 struct iscsi_cls_session *session; 1790 struct Scsi_Host *shost; 1791 struct iscsi_cls_host *ihost; 1792 unsigned long flags; 1793 unsigned int id; 1794 1795 if (!iscsi_is_session_dev(dev)) 1796 return 0; 1797 1798 session = iscsi_dev_to_session(dev); 1799 1800 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1801 1802 shost = iscsi_session_to_shost(session); 1803 ihost = shost->shost_data; 1804 1805 mutex_lock(&ihost->mutex); 1806 spin_lock_irqsave(&session->lock, flags); 1807 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1808 spin_unlock_irqrestore(&session->lock, flags); 1809 goto user_scan_exit; 1810 } 1811 id = session->target_id; 1812 spin_unlock_irqrestore(&session->lock, flags); 1813 1814 if (id != ISCSI_MAX_TARGET) { 1815 if ((scan_data->channel == SCAN_WILD_CARD || 1816 scan_data->channel == 0) && 1817 (scan_data->id == SCAN_WILD_CARD || 1818 scan_data->id == id)) 1819 scsi_scan_target(&session->dev, 0, id, 1820 scan_data->lun, scan_data->rescan); 1821 } 1822 1823 user_scan_exit: 1824 mutex_unlock(&ihost->mutex); 1825 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1826 return 0; 1827 } 1828 1829 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1830 uint id, u64 lun) 1831 { 1832 struct iscsi_scan_data scan_data; 1833 1834 scan_data.channel = channel; 1835 scan_data.id = id; 1836 scan_data.lun = lun; 1837 scan_data.rescan = SCSI_SCAN_MANUAL; 1838 1839 return device_for_each_child(&shost->shost_gendev, &scan_data, 1840 iscsi_user_scan_session); 1841 } 1842 1843 static void iscsi_scan_session(struct work_struct *work) 1844 { 1845 struct iscsi_cls_session *session = 1846 container_of(work, struct iscsi_cls_session, scan_work); 1847 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1848 struct iscsi_cls_host *ihost = shost->shost_data; 1849 struct iscsi_scan_data scan_data; 1850 1851 scan_data.channel = 0; 1852 scan_data.id = SCAN_WILD_CARD; 1853 scan_data.lun = SCAN_WILD_CARD; 1854 scan_data.rescan = SCSI_SCAN_RESCAN; 1855 1856 iscsi_user_scan_session(&session->dev, &scan_data); 1857 atomic_dec(&ihost->nr_scans); 1858 } 1859 1860 /** 1861 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1862 * @cmd: scsi cmd passed to scsi eh handler 1863 * 1864 * If the session is down this function will wait for the recovery 1865 * timer to fire or for the session to be logged back in. If the 1866 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1867 * should pass this error value to the scsi eh. 1868 */ 1869 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1870 { 1871 struct iscsi_cls_session *session = 1872 starget_to_session(scsi_target(cmd->device)); 1873 unsigned long flags; 1874 int ret = 0; 1875 1876 spin_lock_irqsave(&session->lock, flags); 1877 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1878 if (session->state == ISCSI_SESSION_FREE) { 1879 ret = FAST_IO_FAIL; 1880 break; 1881 } 1882 spin_unlock_irqrestore(&session->lock, flags); 1883 msleep(1000); 1884 spin_lock_irqsave(&session->lock, flags); 1885 } 1886 spin_unlock_irqrestore(&session->lock, flags); 1887 return ret; 1888 } 1889 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1890 1891 static void session_recovery_timedout(struct work_struct *work) 1892 { 1893 struct iscsi_cls_session *session = 1894 container_of(work, struct iscsi_cls_session, 1895 recovery_work.work); 1896 unsigned long flags; 1897 1898 iscsi_cls_session_printk(KERN_INFO, session, 1899 "session recovery timed out after %d secs\n", 1900 session->recovery_tmo); 1901 1902 spin_lock_irqsave(&session->lock, flags); 1903 switch (session->state) { 1904 case ISCSI_SESSION_FAILED: 1905 session->state = ISCSI_SESSION_FREE; 1906 break; 1907 case ISCSI_SESSION_LOGGED_IN: 1908 case ISCSI_SESSION_FREE: 1909 /* we raced with the unblock's flush */ 1910 spin_unlock_irqrestore(&session->lock, flags); 1911 return; 1912 } 1913 spin_unlock_irqrestore(&session->lock, flags); 1914 1915 if (session->transport->session_recovery_timedout) 1916 session->transport->session_recovery_timedout(session); 1917 1918 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1919 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1920 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1921 } 1922 1923 static void __iscsi_unblock_session(struct work_struct *work) 1924 { 1925 struct iscsi_cls_session *session = 1926 container_of(work, struct iscsi_cls_session, 1927 unblock_work); 1928 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1929 struct iscsi_cls_host *ihost = shost->shost_data; 1930 unsigned long flags; 1931 1932 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1933 /* 1934 * The recovery and unblock work get run from the same workqueue, 1935 * so try to cancel it if it was going to run after this unblock. 1936 */ 1937 cancel_delayed_work(&session->recovery_work); 1938 spin_lock_irqsave(&session->lock, flags); 1939 session->state = ISCSI_SESSION_LOGGED_IN; 1940 spin_unlock_irqrestore(&session->lock, flags); 1941 /* start IO */ 1942 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1943 /* 1944 * Only do kernel scanning if the driver is properly hooked into 1945 * the async scanning code (drivers like iscsi_tcp do login and 1946 * scanning from userspace). 1947 */ 1948 if (shost->hostt->scan_finished) { 1949 if (scsi_queue_work(shost, &session->scan_work)) 1950 atomic_inc(&ihost->nr_scans); 1951 } 1952 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1953 } 1954 1955 /** 1956 * iscsi_unblock_session - set a session as logged in and start IO. 1957 * @session: iscsi session 1958 * 1959 * Mark a session as ready to accept IO. 1960 */ 1961 void iscsi_unblock_session(struct iscsi_cls_session *session) 1962 { 1963 queue_work(iscsi_eh_timer_workq, &session->unblock_work); 1964 /* 1965 * make sure all the events have completed before tell the driver 1966 * it is safe 1967 */ 1968 flush_workqueue(iscsi_eh_timer_workq); 1969 } 1970 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1971 1972 static void __iscsi_block_session(struct work_struct *work) 1973 { 1974 struct iscsi_cls_session *session = 1975 container_of(work, struct iscsi_cls_session, 1976 block_work); 1977 unsigned long flags; 1978 1979 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1980 spin_lock_irqsave(&session->lock, flags); 1981 session->state = ISCSI_SESSION_FAILED; 1982 spin_unlock_irqrestore(&session->lock, flags); 1983 scsi_target_block(&session->dev); 1984 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1985 if (session->recovery_tmo >= 0) 1986 queue_delayed_work(iscsi_eh_timer_workq, 1987 &session->recovery_work, 1988 session->recovery_tmo * HZ); 1989 } 1990 1991 void iscsi_block_session(struct iscsi_cls_session *session) 1992 { 1993 queue_work(iscsi_eh_timer_workq, &session->block_work); 1994 } 1995 EXPORT_SYMBOL_GPL(iscsi_block_session); 1996 1997 static void __iscsi_unbind_session(struct work_struct *work) 1998 { 1999 struct iscsi_cls_session *session = 2000 container_of(work, struct iscsi_cls_session, 2001 unbind_work); 2002 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2003 struct iscsi_cls_host *ihost = shost->shost_data; 2004 unsigned long flags; 2005 unsigned int target_id; 2006 2007 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 2008 2009 /* Prevent new scans and make sure scanning is not in progress */ 2010 mutex_lock(&ihost->mutex); 2011 spin_lock_irqsave(&session->lock, flags); 2012 if (session->target_id == ISCSI_MAX_TARGET) { 2013 spin_unlock_irqrestore(&session->lock, flags); 2014 mutex_unlock(&ihost->mutex); 2015 return; 2016 } 2017 2018 target_id = session->target_id; 2019 session->target_id = ISCSI_MAX_TARGET; 2020 spin_unlock_irqrestore(&session->lock, flags); 2021 mutex_unlock(&ihost->mutex); 2022 2023 if (session->ida_used) 2024 ida_simple_remove(&iscsi_sess_ida, target_id); 2025 2026 scsi_remove_target(&session->dev); 2027 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2028 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2029 } 2030 2031 struct iscsi_cls_session * 2032 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2033 int dd_size) 2034 { 2035 struct iscsi_cls_session *session; 2036 2037 session = kzalloc(sizeof(*session) + dd_size, 2038 GFP_KERNEL); 2039 if (!session) 2040 return NULL; 2041 2042 session->transport = transport; 2043 session->creator = -1; 2044 session->recovery_tmo = 120; 2045 session->recovery_tmo_sysfs_override = false; 2046 session->state = ISCSI_SESSION_FREE; 2047 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2048 INIT_LIST_HEAD(&session->sess_list); 2049 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2050 INIT_WORK(&session->block_work, __iscsi_block_session); 2051 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2052 INIT_WORK(&session->scan_work, iscsi_scan_session); 2053 spin_lock_init(&session->lock); 2054 2055 /* this is released in the dev's release function */ 2056 scsi_host_get(shost); 2057 session->dev.parent = &shost->shost_gendev; 2058 session->dev.release = iscsi_session_release; 2059 device_initialize(&session->dev); 2060 if (dd_size) 2061 session->dd_data = &session[1]; 2062 2063 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2064 return session; 2065 } 2066 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2067 2068 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2069 { 2070 unsigned long flags; 2071 int id = 0; 2072 int err; 2073 2074 session->sid = atomic_add_return(1, &iscsi_session_nr); 2075 2076 if (target_id == ISCSI_MAX_TARGET) { 2077 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); 2078 2079 if (id < 0) { 2080 iscsi_cls_session_printk(KERN_ERR, session, 2081 "Failure in Target ID Allocation\n"); 2082 return id; 2083 } 2084 session->target_id = (unsigned int)id; 2085 session->ida_used = true; 2086 } else 2087 session->target_id = target_id; 2088 2089 dev_set_name(&session->dev, "session%u", session->sid); 2090 err = device_add(&session->dev); 2091 if (err) { 2092 iscsi_cls_session_printk(KERN_ERR, session, 2093 "could not register session's dev\n"); 2094 goto release_ida; 2095 } 2096 transport_register_device(&session->dev); 2097 2098 spin_lock_irqsave(&sesslock, flags); 2099 list_add(&session->sess_list, &sesslist); 2100 spin_unlock_irqrestore(&sesslock, flags); 2101 2102 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2103 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2104 return 0; 2105 2106 release_ida: 2107 if (session->ida_used) 2108 ida_simple_remove(&iscsi_sess_ida, session->target_id); 2109 2110 return err; 2111 } 2112 EXPORT_SYMBOL_GPL(iscsi_add_session); 2113 2114 /** 2115 * iscsi_create_session - create iscsi class session 2116 * @shost: scsi host 2117 * @transport: iscsi transport 2118 * @dd_size: private driver data size 2119 * @target_id: which target 2120 * 2121 * This can be called from a LLD or iscsi_transport. 2122 */ 2123 struct iscsi_cls_session * 2124 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2125 int dd_size, unsigned int target_id) 2126 { 2127 struct iscsi_cls_session *session; 2128 2129 session = iscsi_alloc_session(shost, transport, dd_size); 2130 if (!session) 2131 return NULL; 2132 2133 if (iscsi_add_session(session, target_id)) { 2134 iscsi_free_session(session); 2135 return NULL; 2136 } 2137 return session; 2138 } 2139 EXPORT_SYMBOL_GPL(iscsi_create_session); 2140 2141 static void iscsi_conn_release(struct device *dev) 2142 { 2143 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2144 struct device *parent = conn->dev.parent; 2145 2146 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2147 kfree(conn); 2148 put_device(parent); 2149 } 2150 2151 static int iscsi_is_conn_dev(const struct device *dev) 2152 { 2153 return dev->release == iscsi_conn_release; 2154 } 2155 2156 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2157 { 2158 if (!iscsi_is_conn_dev(dev)) 2159 return 0; 2160 return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); 2161 } 2162 2163 void iscsi_remove_session(struct iscsi_cls_session *session) 2164 { 2165 unsigned long flags; 2166 int err; 2167 2168 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2169 2170 spin_lock_irqsave(&sesslock, flags); 2171 list_del(&session->sess_list); 2172 spin_unlock_irqrestore(&sesslock, flags); 2173 2174 /* make sure there are no blocks/unblocks queued */ 2175 flush_workqueue(iscsi_eh_timer_workq); 2176 /* make sure the timedout callout is not running */ 2177 if (!cancel_delayed_work(&session->recovery_work)) 2178 flush_workqueue(iscsi_eh_timer_workq); 2179 /* 2180 * If we are blocked let commands flow again. The lld or iscsi 2181 * layer should set up the queuecommand to fail commands. 2182 * We assume that LLD will not be calling block/unblock while 2183 * removing the session. 2184 */ 2185 spin_lock_irqsave(&session->lock, flags); 2186 session->state = ISCSI_SESSION_FREE; 2187 spin_unlock_irqrestore(&session->lock, flags); 2188 2189 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2190 /* flush running scans then delete devices */ 2191 flush_work(&session->scan_work); 2192 /* flush running unbind operations */ 2193 flush_work(&session->unbind_work); 2194 __iscsi_unbind_session(&session->unbind_work); 2195 2196 /* hw iscsi may not have removed all connections from session */ 2197 err = device_for_each_child(&session->dev, NULL, 2198 iscsi_iter_destroy_conn_fn); 2199 if (err) 2200 iscsi_cls_session_printk(KERN_ERR, session, 2201 "Could not delete all connections " 2202 "for session. Error %d.\n", err); 2203 2204 transport_unregister_device(&session->dev); 2205 2206 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2207 device_del(&session->dev); 2208 } 2209 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2210 2211 void iscsi_free_session(struct iscsi_cls_session *session) 2212 { 2213 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2214 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2215 put_device(&session->dev); 2216 } 2217 EXPORT_SYMBOL_GPL(iscsi_free_session); 2218 2219 /** 2220 * iscsi_create_conn - create iscsi class connection 2221 * @session: iscsi cls session 2222 * @dd_size: private driver data size 2223 * @cid: connection id 2224 * 2225 * This can be called from a LLD or iscsi_transport. The connection 2226 * is child of the session so cid must be unique for all connections 2227 * on the session. 2228 * 2229 * Since we do not support MCS, cid will normally be zero. In some cases 2230 * for software iscsi we could be trying to preallocate a connection struct 2231 * in which case there could be two connection structs and cid would be 2232 * non-zero. 2233 */ 2234 struct iscsi_cls_conn * 2235 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2236 { 2237 struct iscsi_transport *transport = session->transport; 2238 struct iscsi_cls_conn *conn; 2239 unsigned long flags; 2240 int err; 2241 2242 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2243 if (!conn) 2244 return NULL; 2245 if (dd_size) 2246 conn->dd_data = &conn[1]; 2247 2248 mutex_init(&conn->ep_mutex); 2249 INIT_LIST_HEAD(&conn->conn_list); 2250 conn->transport = transport; 2251 conn->cid = cid; 2252 2253 /* this is released in the dev's release function */ 2254 if (!get_device(&session->dev)) 2255 goto free_conn; 2256 2257 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2258 conn->dev.parent = &session->dev; 2259 conn->dev.release = iscsi_conn_release; 2260 err = device_register(&conn->dev); 2261 if (err) { 2262 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2263 "register connection's dev\n"); 2264 goto release_parent_ref; 2265 } 2266 transport_register_device(&conn->dev); 2267 2268 spin_lock_irqsave(&connlock, flags); 2269 list_add(&conn->conn_list, &connlist); 2270 spin_unlock_irqrestore(&connlock, flags); 2271 2272 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); 2273 return conn; 2274 2275 release_parent_ref: 2276 put_device(&session->dev); 2277 free_conn: 2278 kfree(conn); 2279 return NULL; 2280 } 2281 2282 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2283 2284 /** 2285 * iscsi_destroy_conn - destroy iscsi class connection 2286 * @conn: iscsi cls session 2287 * 2288 * This can be called from a LLD or iscsi_transport. 2289 */ 2290 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2291 { 2292 unsigned long flags; 2293 2294 spin_lock_irqsave(&connlock, flags); 2295 list_del(&conn->conn_list); 2296 spin_unlock_irqrestore(&connlock, flags); 2297 2298 transport_unregister_device(&conn->dev); 2299 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2300 device_unregister(&conn->dev); 2301 return 0; 2302 } 2303 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2304 2305 /* 2306 * iscsi interface functions 2307 */ 2308 static struct iscsi_internal * 2309 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2310 { 2311 struct iscsi_internal *priv; 2312 unsigned long flags; 2313 2314 spin_lock_irqsave(&iscsi_transport_lock, flags); 2315 list_for_each_entry(priv, &iscsi_transports, list) { 2316 if (tt == priv->iscsi_transport) { 2317 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2318 return priv; 2319 } 2320 } 2321 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2322 return NULL; 2323 } 2324 2325 static int 2326 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2327 { 2328 return nlmsg_multicast(nls, skb, 0, group, gfp); 2329 } 2330 2331 static int 2332 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2333 { 2334 return nlmsg_unicast(nls, skb, portid); 2335 } 2336 2337 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2338 char *data, uint32_t data_size) 2339 { 2340 struct nlmsghdr *nlh; 2341 struct sk_buff *skb; 2342 struct iscsi_uevent *ev; 2343 char *pdu; 2344 struct iscsi_internal *priv; 2345 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2346 data_size); 2347 2348 priv = iscsi_if_transport_lookup(conn->transport); 2349 if (!priv) 2350 return -EINVAL; 2351 2352 skb = alloc_skb(len, GFP_ATOMIC); 2353 if (!skb) { 2354 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2355 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2356 "control PDU: OOM\n"); 2357 return -ENOMEM; 2358 } 2359 2360 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2361 ev = nlmsg_data(nlh); 2362 memset(ev, 0, sizeof(*ev)); 2363 ev->transport_handle = iscsi_handle(conn->transport); 2364 ev->type = ISCSI_KEVENT_RECV_PDU; 2365 ev->r.recv_req.cid = conn->cid; 2366 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2367 pdu = (char*)ev + sizeof(*ev); 2368 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2369 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2370 2371 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2372 } 2373 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2374 2375 int iscsi_offload_mesg(struct Scsi_Host *shost, 2376 struct iscsi_transport *transport, uint32_t type, 2377 char *data, uint16_t data_size) 2378 { 2379 struct nlmsghdr *nlh; 2380 struct sk_buff *skb; 2381 struct iscsi_uevent *ev; 2382 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2383 2384 skb = alloc_skb(len, GFP_ATOMIC); 2385 if (!skb) { 2386 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2387 return -ENOMEM; 2388 } 2389 2390 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2391 ev = nlmsg_data(nlh); 2392 memset(ev, 0, sizeof(*ev)); 2393 ev->type = type; 2394 ev->transport_handle = iscsi_handle(transport); 2395 switch (type) { 2396 case ISCSI_KEVENT_PATH_REQ: 2397 ev->r.req_path.host_no = shost->host_no; 2398 break; 2399 case ISCSI_KEVENT_IF_DOWN: 2400 ev->r.notify_if_down.host_no = shost->host_no; 2401 break; 2402 } 2403 2404 memcpy((char *)ev + sizeof(*ev), data, data_size); 2405 2406 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2407 } 2408 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2409 2410 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2411 { 2412 struct nlmsghdr *nlh; 2413 struct sk_buff *skb; 2414 struct iscsi_uevent *ev; 2415 struct iscsi_internal *priv; 2416 int len = nlmsg_total_size(sizeof(*ev)); 2417 2418 priv = iscsi_if_transport_lookup(conn->transport); 2419 if (!priv) 2420 return; 2421 2422 skb = alloc_skb(len, GFP_ATOMIC); 2423 if (!skb) { 2424 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2425 "conn error (%d)\n", error); 2426 return; 2427 } 2428 2429 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2430 ev = nlmsg_data(nlh); 2431 ev->transport_handle = iscsi_handle(conn->transport); 2432 ev->type = ISCSI_KEVENT_CONN_ERROR; 2433 ev->r.connerror.error = error; 2434 ev->r.connerror.cid = conn->cid; 2435 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2436 2437 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2438 2439 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2440 error); 2441 } 2442 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2443 2444 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2445 enum iscsi_conn_state state) 2446 { 2447 struct nlmsghdr *nlh; 2448 struct sk_buff *skb; 2449 struct iscsi_uevent *ev; 2450 struct iscsi_internal *priv; 2451 int len = nlmsg_total_size(sizeof(*ev)); 2452 2453 priv = iscsi_if_transport_lookup(conn->transport); 2454 if (!priv) 2455 return; 2456 2457 skb = alloc_skb(len, GFP_ATOMIC); 2458 if (!skb) { 2459 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2460 "conn login (%d)\n", state); 2461 return; 2462 } 2463 2464 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2465 ev = nlmsg_data(nlh); 2466 ev->transport_handle = iscsi_handle(conn->transport); 2467 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2468 ev->r.conn_login.state = state; 2469 ev->r.conn_login.cid = conn->cid; 2470 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2471 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2472 2473 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2474 state); 2475 } 2476 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2477 2478 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2479 enum iscsi_host_event_code code, uint32_t data_size, 2480 uint8_t *data) 2481 { 2482 struct nlmsghdr *nlh; 2483 struct sk_buff *skb; 2484 struct iscsi_uevent *ev; 2485 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2486 2487 skb = alloc_skb(len, GFP_NOIO); 2488 if (!skb) { 2489 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2490 host_no, code); 2491 return; 2492 } 2493 2494 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2495 ev = nlmsg_data(nlh); 2496 ev->transport_handle = iscsi_handle(transport); 2497 ev->type = ISCSI_KEVENT_HOST_EVENT; 2498 ev->r.host_event.host_no = host_no; 2499 ev->r.host_event.code = code; 2500 ev->r.host_event.data_size = data_size; 2501 2502 if (data_size) 2503 memcpy((char *)ev + sizeof(*ev), data, data_size); 2504 2505 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2506 } 2507 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2508 2509 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2510 uint32_t status, uint32_t pid, uint32_t data_size, 2511 uint8_t *data) 2512 { 2513 struct nlmsghdr *nlh; 2514 struct sk_buff *skb; 2515 struct iscsi_uevent *ev; 2516 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2517 2518 skb = alloc_skb(len, GFP_NOIO); 2519 if (!skb) { 2520 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2521 return; 2522 } 2523 2524 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2525 ev = nlmsg_data(nlh); 2526 ev->transport_handle = iscsi_handle(transport); 2527 ev->type = ISCSI_KEVENT_PING_COMP; 2528 ev->r.ping_comp.host_no = host_no; 2529 ev->r.ping_comp.status = status; 2530 ev->r.ping_comp.pid = pid; 2531 ev->r.ping_comp.data_size = data_size; 2532 memcpy((char *)ev + sizeof(*ev), data, data_size); 2533 2534 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2535 } 2536 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2537 2538 static int 2539 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2540 { 2541 struct sk_buff *skb; 2542 struct nlmsghdr *nlh; 2543 int len = nlmsg_total_size(size); 2544 2545 skb = alloc_skb(len, GFP_ATOMIC); 2546 if (!skb) { 2547 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2548 return -ENOMEM; 2549 } 2550 2551 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2552 memcpy(nlmsg_data(nlh), payload, size); 2553 return iscsi_unicast_skb(skb, portid); 2554 } 2555 2556 static int 2557 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2558 { 2559 struct iscsi_uevent *ev = nlmsg_data(nlh); 2560 struct iscsi_stats *stats; 2561 struct sk_buff *skbstat; 2562 struct iscsi_cls_conn *conn; 2563 struct nlmsghdr *nlhstat; 2564 struct iscsi_uevent *evstat; 2565 struct iscsi_internal *priv; 2566 int len = nlmsg_total_size(sizeof(*ev) + 2567 sizeof(struct iscsi_stats) + 2568 sizeof(struct iscsi_stats_custom) * 2569 ISCSI_STATS_CUSTOM_MAX); 2570 int err = 0; 2571 2572 priv = iscsi_if_transport_lookup(transport); 2573 if (!priv) 2574 return -EINVAL; 2575 2576 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2577 if (!conn) 2578 return -EEXIST; 2579 2580 do { 2581 int actual_size; 2582 2583 skbstat = alloc_skb(len, GFP_ATOMIC); 2584 if (!skbstat) { 2585 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2586 "deliver stats: OOM\n"); 2587 return -ENOMEM; 2588 } 2589 2590 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2591 (len - sizeof(*nlhstat)), 0); 2592 evstat = nlmsg_data(nlhstat); 2593 memset(evstat, 0, sizeof(*evstat)); 2594 evstat->transport_handle = iscsi_handle(conn->transport); 2595 evstat->type = nlh->nlmsg_type; 2596 evstat->u.get_stats.cid = 2597 ev->u.get_stats.cid; 2598 evstat->u.get_stats.sid = 2599 ev->u.get_stats.sid; 2600 stats = (struct iscsi_stats *) 2601 ((char*)evstat + sizeof(*evstat)); 2602 memset(stats, 0, sizeof(*stats)); 2603 2604 transport->get_stats(conn, stats); 2605 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2606 sizeof(struct iscsi_stats) + 2607 sizeof(struct iscsi_stats_custom) * 2608 stats->custom_length); 2609 actual_size -= sizeof(*nlhstat); 2610 actual_size = nlmsg_msg_size(actual_size); 2611 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2612 nlhstat->nlmsg_len = actual_size; 2613 2614 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2615 GFP_ATOMIC); 2616 } while (err < 0 && err != -ECONNREFUSED); 2617 2618 return err; 2619 } 2620 2621 /** 2622 * iscsi_session_event - send session destr. completion event 2623 * @session: iscsi class session 2624 * @event: type of event 2625 */ 2626 int iscsi_session_event(struct iscsi_cls_session *session, 2627 enum iscsi_uevent_e event) 2628 { 2629 struct iscsi_internal *priv; 2630 struct Scsi_Host *shost; 2631 struct iscsi_uevent *ev; 2632 struct sk_buff *skb; 2633 struct nlmsghdr *nlh; 2634 int rc, len = nlmsg_total_size(sizeof(*ev)); 2635 2636 priv = iscsi_if_transport_lookup(session->transport); 2637 if (!priv) 2638 return -EINVAL; 2639 shost = iscsi_session_to_shost(session); 2640 2641 skb = alloc_skb(len, GFP_KERNEL); 2642 if (!skb) { 2643 iscsi_cls_session_printk(KERN_ERR, session, 2644 "Cannot notify userspace of session " 2645 "event %u\n", event); 2646 return -ENOMEM; 2647 } 2648 2649 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2650 ev = nlmsg_data(nlh); 2651 ev->transport_handle = iscsi_handle(session->transport); 2652 2653 ev->type = event; 2654 switch (event) { 2655 case ISCSI_KEVENT_DESTROY_SESSION: 2656 ev->r.d_session.host_no = shost->host_no; 2657 ev->r.d_session.sid = session->sid; 2658 break; 2659 case ISCSI_KEVENT_CREATE_SESSION: 2660 ev->r.c_session_ret.host_no = shost->host_no; 2661 ev->r.c_session_ret.sid = session->sid; 2662 break; 2663 case ISCSI_KEVENT_UNBIND_SESSION: 2664 ev->r.unbind_session.host_no = shost->host_no; 2665 ev->r.unbind_session.sid = session->sid; 2666 break; 2667 default: 2668 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2669 "%u.\n", event); 2670 kfree_skb(skb); 2671 return -EINVAL; 2672 } 2673 2674 /* 2675 * this will occur if the daemon is not up, so we just warn 2676 * the user and when the daemon is restarted it will handle it 2677 */ 2678 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2679 if (rc == -ESRCH) 2680 iscsi_cls_session_printk(KERN_ERR, session, 2681 "Cannot notify userspace of session " 2682 "event %u. Check iscsi daemon\n", 2683 event); 2684 2685 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2686 event, rc); 2687 return rc; 2688 } 2689 EXPORT_SYMBOL_GPL(iscsi_session_event); 2690 2691 static int 2692 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2693 struct iscsi_uevent *ev, pid_t pid, 2694 uint32_t initial_cmdsn, uint16_t cmds_max, 2695 uint16_t queue_depth) 2696 { 2697 struct iscsi_transport *transport = priv->iscsi_transport; 2698 struct iscsi_cls_session *session; 2699 struct Scsi_Host *shost; 2700 2701 session = transport->create_session(ep, cmds_max, queue_depth, 2702 initial_cmdsn); 2703 if (!session) 2704 return -ENOMEM; 2705 2706 session->creator = pid; 2707 shost = iscsi_session_to_shost(session); 2708 ev->r.c_session_ret.host_no = shost->host_no; 2709 ev->r.c_session_ret.sid = session->sid; 2710 ISCSI_DBG_TRANS_SESSION(session, 2711 "Completed creating transport session\n"); 2712 return 0; 2713 } 2714 2715 static int 2716 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2717 { 2718 struct iscsi_cls_conn *conn; 2719 struct iscsi_cls_session *session; 2720 2721 session = iscsi_session_lookup(ev->u.c_conn.sid); 2722 if (!session) { 2723 printk(KERN_ERR "iscsi: invalid session %d.\n", 2724 ev->u.c_conn.sid); 2725 return -EINVAL; 2726 } 2727 2728 conn = transport->create_conn(session, ev->u.c_conn.cid); 2729 if (!conn) { 2730 iscsi_cls_session_printk(KERN_ERR, session, 2731 "couldn't create a new connection."); 2732 return -ENOMEM; 2733 } 2734 2735 ev->r.c_conn_ret.sid = session->sid; 2736 ev->r.c_conn_ret.cid = conn->cid; 2737 2738 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2739 return 0; 2740 } 2741 2742 static int 2743 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2744 { 2745 struct iscsi_cls_conn *conn; 2746 2747 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2748 if (!conn) 2749 return -EINVAL; 2750 2751 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2752 if (transport->destroy_conn) 2753 transport->destroy_conn(conn); 2754 2755 return 0; 2756 } 2757 2758 static int 2759 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2760 { 2761 char *data = (char*)ev + sizeof(*ev); 2762 struct iscsi_cls_conn *conn; 2763 struct iscsi_cls_session *session; 2764 int err = 0, value = 0; 2765 2766 session = iscsi_session_lookup(ev->u.set_param.sid); 2767 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2768 if (!conn || !session) 2769 return -EINVAL; 2770 2771 switch (ev->u.set_param.param) { 2772 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2773 sscanf(data, "%d", &value); 2774 if (!session->recovery_tmo_sysfs_override) 2775 session->recovery_tmo = value; 2776 break; 2777 default: 2778 err = transport->set_param(conn, ev->u.set_param.param, 2779 data, ev->u.set_param.len); 2780 } 2781 2782 return err; 2783 } 2784 2785 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2786 struct iscsi_uevent *ev, int msg_type) 2787 { 2788 struct iscsi_endpoint *ep; 2789 struct sockaddr *dst_addr; 2790 struct Scsi_Host *shost = NULL; 2791 int non_blocking, err = 0; 2792 2793 if (!transport->ep_connect) 2794 return -EINVAL; 2795 2796 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2797 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2798 if (!shost) { 2799 printk(KERN_ERR "ep connect failed. Could not find " 2800 "host no %u\n", 2801 ev->u.ep_connect_through_host.host_no); 2802 return -ENODEV; 2803 } 2804 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2805 } else 2806 non_blocking = ev->u.ep_connect.non_blocking; 2807 2808 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2809 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2810 if (IS_ERR(ep)) { 2811 err = PTR_ERR(ep); 2812 goto release_host; 2813 } 2814 2815 ev->r.ep_connect_ret.handle = ep->id; 2816 release_host: 2817 if (shost) 2818 scsi_host_put(shost); 2819 return err; 2820 } 2821 2822 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2823 u64 ep_handle) 2824 { 2825 struct iscsi_cls_conn *conn; 2826 struct iscsi_endpoint *ep; 2827 2828 if (!transport->ep_disconnect) 2829 return -EINVAL; 2830 2831 ep = iscsi_lookup_endpoint(ep_handle); 2832 if (!ep) 2833 return -EINVAL; 2834 conn = ep->conn; 2835 if (conn) { 2836 mutex_lock(&conn->ep_mutex); 2837 conn->ep = NULL; 2838 mutex_unlock(&conn->ep_mutex); 2839 } 2840 2841 transport->ep_disconnect(ep); 2842 return 0; 2843 } 2844 2845 static int 2846 iscsi_if_transport_ep(struct iscsi_transport *transport, 2847 struct iscsi_uevent *ev, int msg_type) 2848 { 2849 struct iscsi_endpoint *ep; 2850 int rc = 0; 2851 2852 switch (msg_type) { 2853 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2854 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2855 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2856 break; 2857 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2858 if (!transport->ep_poll) 2859 return -EINVAL; 2860 2861 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2862 if (!ep) 2863 return -EINVAL; 2864 2865 ev->r.retcode = transport->ep_poll(ep, 2866 ev->u.ep_poll.timeout_ms); 2867 break; 2868 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 2869 rc = iscsi_if_ep_disconnect(transport, 2870 ev->u.ep_disconnect.ep_handle); 2871 break; 2872 } 2873 return rc; 2874 } 2875 2876 static int 2877 iscsi_tgt_dscvr(struct iscsi_transport *transport, 2878 struct iscsi_uevent *ev) 2879 { 2880 struct Scsi_Host *shost; 2881 struct sockaddr *dst_addr; 2882 int err; 2883 2884 if (!transport->tgt_dscvr) 2885 return -EINVAL; 2886 2887 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 2888 if (!shost) { 2889 printk(KERN_ERR "target discovery could not find host no %u\n", 2890 ev->u.tgt_dscvr.host_no); 2891 return -ENODEV; 2892 } 2893 2894 2895 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2896 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 2897 ev->u.tgt_dscvr.enable, dst_addr); 2898 scsi_host_put(shost); 2899 return err; 2900 } 2901 2902 static int 2903 iscsi_set_host_param(struct iscsi_transport *transport, 2904 struct iscsi_uevent *ev) 2905 { 2906 char *data = (char*)ev + sizeof(*ev); 2907 struct Scsi_Host *shost; 2908 int err; 2909 2910 if (!transport->set_host_param) 2911 return -ENOSYS; 2912 2913 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 2914 if (!shost) { 2915 printk(KERN_ERR "set_host_param could not find host no %u\n", 2916 ev->u.set_host_param.host_no); 2917 return -ENODEV; 2918 } 2919 2920 err = transport->set_host_param(shost, ev->u.set_host_param.param, 2921 data, ev->u.set_host_param.len); 2922 scsi_host_put(shost); 2923 return err; 2924 } 2925 2926 static int 2927 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2928 { 2929 struct Scsi_Host *shost; 2930 struct iscsi_path *params; 2931 int err; 2932 2933 if (!transport->set_path) 2934 return -ENOSYS; 2935 2936 shost = scsi_host_lookup(ev->u.set_path.host_no); 2937 if (!shost) { 2938 printk(KERN_ERR "set path could not find host no %u\n", 2939 ev->u.set_path.host_no); 2940 return -ENODEV; 2941 } 2942 2943 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 2944 err = transport->set_path(shost, params); 2945 2946 scsi_host_put(shost); 2947 return err; 2948 } 2949 2950 static int 2951 iscsi_set_iface_params(struct iscsi_transport *transport, 2952 struct iscsi_uevent *ev, uint32_t len) 2953 { 2954 char *data = (char *)ev + sizeof(*ev); 2955 struct Scsi_Host *shost; 2956 int err; 2957 2958 if (!transport->set_iface_param) 2959 return -ENOSYS; 2960 2961 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 2962 if (!shost) { 2963 printk(KERN_ERR "set_iface_params could not find host no %u\n", 2964 ev->u.set_iface_params.host_no); 2965 return -ENODEV; 2966 } 2967 2968 err = transport->set_iface_param(shost, data, len); 2969 scsi_host_put(shost); 2970 return err; 2971 } 2972 2973 static int 2974 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2975 { 2976 struct Scsi_Host *shost; 2977 struct sockaddr *dst_addr; 2978 int err; 2979 2980 if (!transport->send_ping) 2981 return -ENOSYS; 2982 2983 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 2984 if (!shost) { 2985 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 2986 ev->u.iscsi_ping.host_no); 2987 return -ENODEV; 2988 } 2989 2990 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 2991 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 2992 ev->u.iscsi_ping.iface_type, 2993 ev->u.iscsi_ping.payload_size, 2994 ev->u.iscsi_ping.pid, 2995 dst_addr); 2996 scsi_host_put(shost); 2997 return err; 2998 } 2999 3000 static int 3001 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3002 { 3003 struct iscsi_uevent *ev = nlmsg_data(nlh); 3004 struct Scsi_Host *shost = NULL; 3005 struct iscsi_chap_rec *chap_rec; 3006 struct iscsi_internal *priv; 3007 struct sk_buff *skbchap; 3008 struct nlmsghdr *nlhchap; 3009 struct iscsi_uevent *evchap; 3010 uint32_t chap_buf_size; 3011 int len, err = 0; 3012 char *buf; 3013 3014 if (!transport->get_chap) 3015 return -EINVAL; 3016 3017 priv = iscsi_if_transport_lookup(transport); 3018 if (!priv) 3019 return -EINVAL; 3020 3021 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3022 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3023 3024 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3025 if (!shost) { 3026 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3027 __func__, ev->u.get_chap.host_no); 3028 return -ENODEV; 3029 } 3030 3031 do { 3032 int actual_size; 3033 3034 skbchap = alloc_skb(len, GFP_KERNEL); 3035 if (!skbchap) { 3036 printk(KERN_ERR "can not deliver chap: OOM\n"); 3037 err = -ENOMEM; 3038 goto exit_get_chap; 3039 } 3040 3041 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3042 (len - sizeof(*nlhchap)), 0); 3043 evchap = nlmsg_data(nlhchap); 3044 memset(evchap, 0, sizeof(*evchap)); 3045 evchap->transport_handle = iscsi_handle(transport); 3046 evchap->type = nlh->nlmsg_type; 3047 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3048 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3049 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3050 buf = (char *)evchap + sizeof(*evchap); 3051 memset(buf, 0, chap_buf_size); 3052 3053 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3054 &evchap->u.get_chap.num_entries, buf); 3055 3056 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3057 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3058 nlhchap->nlmsg_len = actual_size; 3059 3060 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3061 GFP_KERNEL); 3062 } while (err < 0 && err != -ECONNREFUSED); 3063 3064 exit_get_chap: 3065 scsi_host_put(shost); 3066 return err; 3067 } 3068 3069 static int iscsi_set_chap(struct iscsi_transport *transport, 3070 struct iscsi_uevent *ev, uint32_t len) 3071 { 3072 char *data = (char *)ev + sizeof(*ev); 3073 struct Scsi_Host *shost; 3074 int err = 0; 3075 3076 if (!transport->set_chap) 3077 return -ENOSYS; 3078 3079 shost = scsi_host_lookup(ev->u.set_path.host_no); 3080 if (!shost) { 3081 pr_err("%s could not find host no %u\n", 3082 __func__, ev->u.set_path.host_no); 3083 return -ENODEV; 3084 } 3085 3086 err = transport->set_chap(shost, data, len); 3087 scsi_host_put(shost); 3088 return err; 3089 } 3090 3091 static int iscsi_delete_chap(struct iscsi_transport *transport, 3092 struct iscsi_uevent *ev) 3093 { 3094 struct Scsi_Host *shost; 3095 int err = 0; 3096 3097 if (!transport->delete_chap) 3098 return -ENOSYS; 3099 3100 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3101 if (!shost) { 3102 printk(KERN_ERR "%s could not find host no %u\n", 3103 __func__, ev->u.delete_chap.host_no); 3104 return -ENODEV; 3105 } 3106 3107 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3108 scsi_host_put(shost); 3109 return err; 3110 } 3111 3112 static const struct { 3113 enum iscsi_discovery_parent_type value; 3114 char *name; 3115 } iscsi_discovery_parent_names[] = { 3116 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3117 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3118 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3119 }; 3120 3121 char *iscsi_get_discovery_parent_name(int parent_type) 3122 { 3123 int i; 3124 char *state = "Unknown!"; 3125 3126 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3127 if (iscsi_discovery_parent_names[i].value & parent_type) { 3128 state = iscsi_discovery_parent_names[i].name; 3129 break; 3130 } 3131 } 3132 return state; 3133 } 3134 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3135 3136 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3137 struct iscsi_uevent *ev, uint32_t len) 3138 { 3139 char *data = (char *)ev + sizeof(*ev); 3140 struct Scsi_Host *shost; 3141 struct iscsi_bus_flash_session *fnode_sess; 3142 struct iscsi_bus_flash_conn *fnode_conn; 3143 struct device *dev; 3144 uint32_t idx; 3145 int err = 0; 3146 3147 if (!transport->set_flashnode_param) { 3148 err = -ENOSYS; 3149 goto exit_set_fnode; 3150 } 3151 3152 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3153 if (!shost) { 3154 pr_err("%s could not find host no %u\n", 3155 __func__, ev->u.set_flashnode.host_no); 3156 err = -ENODEV; 3157 goto put_host; 3158 } 3159 3160 idx = ev->u.set_flashnode.flashnode_idx; 3161 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3162 if (!fnode_sess) { 3163 pr_err("%s could not find flashnode %u for host no %u\n", 3164 __func__, idx, ev->u.set_flashnode.host_no); 3165 err = -ENODEV; 3166 goto put_host; 3167 } 3168 3169 dev = iscsi_find_flashnode_conn(fnode_sess); 3170 if (!dev) { 3171 err = -ENODEV; 3172 goto put_sess; 3173 } 3174 3175 fnode_conn = iscsi_dev_to_flash_conn(dev); 3176 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3177 put_device(dev); 3178 3179 put_sess: 3180 put_device(&fnode_sess->dev); 3181 3182 put_host: 3183 scsi_host_put(shost); 3184 3185 exit_set_fnode: 3186 return err; 3187 } 3188 3189 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3190 struct iscsi_uevent *ev, uint32_t len) 3191 { 3192 char *data = (char *)ev + sizeof(*ev); 3193 struct Scsi_Host *shost; 3194 int index; 3195 int err = 0; 3196 3197 if (!transport->new_flashnode) { 3198 err = -ENOSYS; 3199 goto exit_new_fnode; 3200 } 3201 3202 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3203 if (!shost) { 3204 pr_err("%s could not find host no %u\n", 3205 __func__, ev->u.new_flashnode.host_no); 3206 err = -ENODEV; 3207 goto put_host; 3208 } 3209 3210 index = transport->new_flashnode(shost, data, len); 3211 3212 if (index >= 0) 3213 ev->r.new_flashnode_ret.flashnode_idx = index; 3214 else 3215 err = -EIO; 3216 3217 put_host: 3218 scsi_host_put(shost); 3219 3220 exit_new_fnode: 3221 return err; 3222 } 3223 3224 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3225 struct iscsi_uevent *ev) 3226 { 3227 struct Scsi_Host *shost; 3228 struct iscsi_bus_flash_session *fnode_sess; 3229 uint32_t idx; 3230 int err = 0; 3231 3232 if (!transport->del_flashnode) { 3233 err = -ENOSYS; 3234 goto exit_del_fnode; 3235 } 3236 3237 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3238 if (!shost) { 3239 pr_err("%s could not find host no %u\n", 3240 __func__, ev->u.del_flashnode.host_no); 3241 err = -ENODEV; 3242 goto put_host; 3243 } 3244 3245 idx = ev->u.del_flashnode.flashnode_idx; 3246 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3247 if (!fnode_sess) { 3248 pr_err("%s could not find flashnode %u for host no %u\n", 3249 __func__, idx, ev->u.del_flashnode.host_no); 3250 err = -ENODEV; 3251 goto put_host; 3252 } 3253 3254 err = transport->del_flashnode(fnode_sess); 3255 put_device(&fnode_sess->dev); 3256 3257 put_host: 3258 scsi_host_put(shost); 3259 3260 exit_del_fnode: 3261 return err; 3262 } 3263 3264 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3265 struct iscsi_uevent *ev) 3266 { 3267 struct Scsi_Host *shost; 3268 struct iscsi_bus_flash_session *fnode_sess; 3269 struct iscsi_bus_flash_conn *fnode_conn; 3270 struct device *dev; 3271 uint32_t idx; 3272 int err = 0; 3273 3274 if (!transport->login_flashnode) { 3275 err = -ENOSYS; 3276 goto exit_login_fnode; 3277 } 3278 3279 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3280 if (!shost) { 3281 pr_err("%s could not find host no %u\n", 3282 __func__, ev->u.login_flashnode.host_no); 3283 err = -ENODEV; 3284 goto put_host; 3285 } 3286 3287 idx = ev->u.login_flashnode.flashnode_idx; 3288 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3289 if (!fnode_sess) { 3290 pr_err("%s could not find flashnode %u for host no %u\n", 3291 __func__, idx, ev->u.login_flashnode.host_no); 3292 err = -ENODEV; 3293 goto put_host; 3294 } 3295 3296 dev = iscsi_find_flashnode_conn(fnode_sess); 3297 if (!dev) { 3298 err = -ENODEV; 3299 goto put_sess; 3300 } 3301 3302 fnode_conn = iscsi_dev_to_flash_conn(dev); 3303 err = transport->login_flashnode(fnode_sess, fnode_conn); 3304 put_device(dev); 3305 3306 put_sess: 3307 put_device(&fnode_sess->dev); 3308 3309 put_host: 3310 scsi_host_put(shost); 3311 3312 exit_login_fnode: 3313 return err; 3314 } 3315 3316 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3317 struct iscsi_uevent *ev) 3318 { 3319 struct Scsi_Host *shost; 3320 struct iscsi_bus_flash_session *fnode_sess; 3321 struct iscsi_bus_flash_conn *fnode_conn; 3322 struct device *dev; 3323 uint32_t idx; 3324 int err = 0; 3325 3326 if (!transport->logout_flashnode) { 3327 err = -ENOSYS; 3328 goto exit_logout_fnode; 3329 } 3330 3331 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3332 if (!shost) { 3333 pr_err("%s could not find host no %u\n", 3334 __func__, ev->u.logout_flashnode.host_no); 3335 err = -ENODEV; 3336 goto put_host; 3337 } 3338 3339 idx = ev->u.logout_flashnode.flashnode_idx; 3340 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3341 if (!fnode_sess) { 3342 pr_err("%s could not find flashnode %u for host no %u\n", 3343 __func__, idx, ev->u.logout_flashnode.host_no); 3344 err = -ENODEV; 3345 goto put_host; 3346 } 3347 3348 dev = iscsi_find_flashnode_conn(fnode_sess); 3349 if (!dev) { 3350 err = -ENODEV; 3351 goto put_sess; 3352 } 3353 3354 fnode_conn = iscsi_dev_to_flash_conn(dev); 3355 3356 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3357 put_device(dev); 3358 3359 put_sess: 3360 put_device(&fnode_sess->dev); 3361 3362 put_host: 3363 scsi_host_put(shost); 3364 3365 exit_logout_fnode: 3366 return err; 3367 } 3368 3369 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3370 struct iscsi_uevent *ev) 3371 { 3372 struct Scsi_Host *shost; 3373 struct iscsi_cls_session *session; 3374 int err = 0; 3375 3376 if (!transport->logout_flashnode_sid) { 3377 err = -ENOSYS; 3378 goto exit_logout_sid; 3379 } 3380 3381 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3382 if (!shost) { 3383 pr_err("%s could not find host no %u\n", 3384 __func__, ev->u.logout_flashnode.host_no); 3385 err = -ENODEV; 3386 goto put_host; 3387 } 3388 3389 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3390 if (!session) { 3391 pr_err("%s could not find session id %u\n", 3392 __func__, ev->u.logout_flashnode_sid.sid); 3393 err = -EINVAL; 3394 goto put_host; 3395 } 3396 3397 err = transport->logout_flashnode_sid(session); 3398 3399 put_host: 3400 scsi_host_put(shost); 3401 3402 exit_logout_sid: 3403 return err; 3404 } 3405 3406 static int 3407 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3408 { 3409 struct iscsi_uevent *ev = nlmsg_data(nlh); 3410 struct Scsi_Host *shost = NULL; 3411 struct iscsi_internal *priv; 3412 struct sk_buff *skbhost_stats; 3413 struct nlmsghdr *nlhhost_stats; 3414 struct iscsi_uevent *evhost_stats; 3415 int host_stats_size = 0; 3416 int len, err = 0; 3417 char *buf; 3418 3419 if (!transport->get_host_stats) 3420 return -ENOSYS; 3421 3422 priv = iscsi_if_transport_lookup(transport); 3423 if (!priv) 3424 return -EINVAL; 3425 3426 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3427 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3428 3429 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3430 if (!shost) { 3431 pr_err("%s: failed. Could not find host no %u\n", 3432 __func__, ev->u.get_host_stats.host_no); 3433 return -ENODEV; 3434 } 3435 3436 do { 3437 int actual_size; 3438 3439 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3440 if (!skbhost_stats) { 3441 pr_err("cannot deliver host stats: OOM\n"); 3442 err = -ENOMEM; 3443 goto exit_host_stats; 3444 } 3445 3446 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3447 (len - sizeof(*nlhhost_stats)), 0); 3448 evhost_stats = nlmsg_data(nlhhost_stats); 3449 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3450 evhost_stats->transport_handle = iscsi_handle(transport); 3451 evhost_stats->type = nlh->nlmsg_type; 3452 evhost_stats->u.get_host_stats.host_no = 3453 ev->u.get_host_stats.host_no; 3454 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3455 memset(buf, 0, host_stats_size); 3456 3457 err = transport->get_host_stats(shost, buf, host_stats_size); 3458 if (err) { 3459 kfree_skb(skbhost_stats); 3460 goto exit_host_stats; 3461 } 3462 3463 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3464 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3465 nlhhost_stats->nlmsg_len = actual_size; 3466 3467 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3468 GFP_KERNEL); 3469 } while (err < 0 && err != -ECONNREFUSED); 3470 3471 exit_host_stats: 3472 scsi_host_put(shost); 3473 return err; 3474 } 3475 3476 3477 static int 3478 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3479 { 3480 int err = 0; 3481 u32 portid; 3482 struct iscsi_uevent *ev = nlmsg_data(nlh); 3483 struct iscsi_transport *transport = NULL; 3484 struct iscsi_internal *priv; 3485 struct iscsi_cls_session *session; 3486 struct iscsi_cls_conn *conn; 3487 struct iscsi_endpoint *ep = NULL; 3488 3489 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3490 *group = ISCSI_NL_GRP_UIP; 3491 else 3492 *group = ISCSI_NL_GRP_ISCSID; 3493 3494 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3495 if (!priv) 3496 return -EINVAL; 3497 transport = priv->iscsi_transport; 3498 3499 if (!try_module_get(transport->owner)) 3500 return -EINVAL; 3501 3502 portid = NETLINK_CB(skb).portid; 3503 3504 switch (nlh->nlmsg_type) { 3505 case ISCSI_UEVENT_CREATE_SESSION: 3506 err = iscsi_if_create_session(priv, ep, ev, 3507 portid, 3508 ev->u.c_session.initial_cmdsn, 3509 ev->u.c_session.cmds_max, 3510 ev->u.c_session.queue_depth); 3511 break; 3512 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3513 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3514 if (!ep) { 3515 err = -EINVAL; 3516 break; 3517 } 3518 3519 err = iscsi_if_create_session(priv, ep, ev, 3520 portid, 3521 ev->u.c_bound_session.initial_cmdsn, 3522 ev->u.c_bound_session.cmds_max, 3523 ev->u.c_bound_session.queue_depth); 3524 break; 3525 case ISCSI_UEVENT_DESTROY_SESSION: 3526 session = iscsi_session_lookup(ev->u.d_session.sid); 3527 if (session) 3528 transport->destroy_session(session); 3529 else 3530 err = -EINVAL; 3531 break; 3532 case ISCSI_UEVENT_UNBIND_SESSION: 3533 session = iscsi_session_lookup(ev->u.d_session.sid); 3534 if (session) 3535 scsi_queue_work(iscsi_session_to_shost(session), 3536 &session->unbind_work); 3537 else 3538 err = -EINVAL; 3539 break; 3540 case ISCSI_UEVENT_CREATE_CONN: 3541 err = iscsi_if_create_conn(transport, ev); 3542 break; 3543 case ISCSI_UEVENT_DESTROY_CONN: 3544 err = iscsi_if_destroy_conn(transport, ev); 3545 break; 3546 case ISCSI_UEVENT_BIND_CONN: 3547 session = iscsi_session_lookup(ev->u.b_conn.sid); 3548 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3549 3550 if (conn && conn->ep) 3551 iscsi_if_ep_disconnect(transport, conn->ep->id); 3552 3553 if (!session || !conn) { 3554 err = -EINVAL; 3555 break; 3556 } 3557 3558 ev->r.retcode = transport->bind_conn(session, conn, 3559 ev->u.b_conn.transport_eph, 3560 ev->u.b_conn.is_leading); 3561 if (ev->r.retcode || !transport->ep_connect) 3562 break; 3563 3564 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3565 if (ep) { 3566 ep->conn = conn; 3567 3568 mutex_lock(&conn->ep_mutex); 3569 conn->ep = ep; 3570 mutex_unlock(&conn->ep_mutex); 3571 } else 3572 iscsi_cls_conn_printk(KERN_ERR, conn, 3573 "Could not set ep conn " 3574 "binding\n"); 3575 break; 3576 case ISCSI_UEVENT_SET_PARAM: 3577 err = iscsi_set_param(transport, ev); 3578 break; 3579 case ISCSI_UEVENT_START_CONN: 3580 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3581 if (conn) 3582 ev->r.retcode = transport->start_conn(conn); 3583 else 3584 err = -EINVAL; 3585 break; 3586 case ISCSI_UEVENT_STOP_CONN: 3587 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3588 if (conn) 3589 transport->stop_conn(conn, ev->u.stop_conn.flag); 3590 else 3591 err = -EINVAL; 3592 break; 3593 case ISCSI_UEVENT_SEND_PDU: 3594 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3595 if (conn) 3596 ev->r.retcode = transport->send_pdu(conn, 3597 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3598 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3599 ev->u.send_pdu.data_size); 3600 else 3601 err = -EINVAL; 3602 break; 3603 case ISCSI_UEVENT_GET_STATS: 3604 err = iscsi_if_get_stats(transport, nlh); 3605 break; 3606 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3607 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3608 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3609 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3610 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3611 break; 3612 case ISCSI_UEVENT_TGT_DSCVR: 3613 err = iscsi_tgt_dscvr(transport, ev); 3614 break; 3615 case ISCSI_UEVENT_SET_HOST_PARAM: 3616 err = iscsi_set_host_param(transport, ev); 3617 break; 3618 case ISCSI_UEVENT_PATH_UPDATE: 3619 err = iscsi_set_path(transport, ev); 3620 break; 3621 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3622 err = iscsi_set_iface_params(transport, ev, 3623 nlmsg_attrlen(nlh, sizeof(*ev))); 3624 break; 3625 case ISCSI_UEVENT_PING: 3626 err = iscsi_send_ping(transport, ev); 3627 break; 3628 case ISCSI_UEVENT_GET_CHAP: 3629 err = iscsi_get_chap(transport, nlh); 3630 break; 3631 case ISCSI_UEVENT_DELETE_CHAP: 3632 err = iscsi_delete_chap(transport, ev); 3633 break; 3634 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3635 err = iscsi_set_flashnode_param(transport, ev, 3636 nlmsg_attrlen(nlh, 3637 sizeof(*ev))); 3638 break; 3639 case ISCSI_UEVENT_NEW_FLASHNODE: 3640 err = iscsi_new_flashnode(transport, ev, 3641 nlmsg_attrlen(nlh, sizeof(*ev))); 3642 break; 3643 case ISCSI_UEVENT_DEL_FLASHNODE: 3644 err = iscsi_del_flashnode(transport, ev); 3645 break; 3646 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3647 err = iscsi_login_flashnode(transport, ev); 3648 break; 3649 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3650 err = iscsi_logout_flashnode(transport, ev); 3651 break; 3652 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3653 err = iscsi_logout_flashnode_sid(transport, ev); 3654 break; 3655 case ISCSI_UEVENT_SET_CHAP: 3656 err = iscsi_set_chap(transport, ev, 3657 nlmsg_attrlen(nlh, sizeof(*ev))); 3658 break; 3659 case ISCSI_UEVENT_GET_HOST_STATS: 3660 err = iscsi_get_host_stats(transport, nlh); 3661 break; 3662 default: 3663 err = -ENOSYS; 3664 break; 3665 } 3666 3667 module_put(transport->owner); 3668 return err; 3669 } 3670 3671 /* 3672 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3673 * Malformed skbs with wrong lengths or invalid creds are not processed. 3674 */ 3675 static void 3676 iscsi_if_rx(struct sk_buff *skb) 3677 { 3678 u32 portid = NETLINK_CB(skb).portid; 3679 3680 mutex_lock(&rx_queue_mutex); 3681 while (skb->len >= NLMSG_HDRLEN) { 3682 int err; 3683 uint32_t rlen; 3684 struct nlmsghdr *nlh; 3685 struct iscsi_uevent *ev; 3686 uint32_t group; 3687 int retries = ISCSI_SEND_MAX_ALLOWED; 3688 3689 nlh = nlmsg_hdr(skb); 3690 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3691 skb->len < nlh->nlmsg_len) { 3692 break; 3693 } 3694 3695 ev = nlmsg_data(nlh); 3696 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3697 if (rlen > skb->len) 3698 rlen = skb->len; 3699 3700 err = iscsi_if_recv_msg(skb, nlh, &group); 3701 if (err) { 3702 ev->type = ISCSI_KEVENT_IF_ERROR; 3703 ev->iferror = err; 3704 } 3705 do { 3706 /* 3707 * special case for GET_STATS: 3708 * on success - sending reply and stats from 3709 * inside of if_recv_msg(), 3710 * on error - fall through. 3711 */ 3712 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3713 break; 3714 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3715 break; 3716 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3717 ev, sizeof(*ev)); 3718 if (err == -EAGAIN && --retries < 0) { 3719 printk(KERN_WARNING "Send reply failed, error %d\n", err); 3720 break; 3721 } 3722 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3723 skb_pull(skb, rlen); 3724 } 3725 mutex_unlock(&rx_queue_mutex); 3726 } 3727 3728 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3729 struct device_attribute dev_attr_##_prefix##_##_name = \ 3730 __ATTR(_name,_mode,_show,_store) 3731 3732 /* 3733 * iSCSI connection attrs 3734 */ 3735 #define iscsi_conn_attr_show(param) \ 3736 static ssize_t \ 3737 show_conn_param_##param(struct device *dev, \ 3738 struct device_attribute *attr, char *buf) \ 3739 { \ 3740 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3741 struct iscsi_transport *t = conn->transport; \ 3742 return t->get_conn_param(conn, param, buf); \ 3743 } 3744 3745 #define iscsi_conn_attr(field, param) \ 3746 iscsi_conn_attr_show(param) \ 3747 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3748 NULL); 3749 3750 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3751 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3752 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3753 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3754 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3755 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3756 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3757 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3758 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3759 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3760 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3761 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3762 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3763 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3764 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3765 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3766 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3767 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3768 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3769 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3770 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3771 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3772 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3773 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3774 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3775 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3776 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3777 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3778 3779 3780 #define iscsi_conn_ep_attr_show(param) \ 3781 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 3782 struct device_attribute *attr,\ 3783 char *buf) \ 3784 { \ 3785 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3786 struct iscsi_transport *t = conn->transport; \ 3787 struct iscsi_endpoint *ep; \ 3788 ssize_t rc; \ 3789 \ 3790 /* \ 3791 * Need to make sure ep_disconnect does not free the LLD's \ 3792 * interconnect resources while we are trying to read them. \ 3793 */ \ 3794 mutex_lock(&conn->ep_mutex); \ 3795 ep = conn->ep; \ 3796 if (!ep && t->ep_connect) { \ 3797 mutex_unlock(&conn->ep_mutex); \ 3798 return -ENOTCONN; \ 3799 } \ 3800 \ 3801 if (ep) \ 3802 rc = t->get_ep_param(ep, param, buf); \ 3803 else \ 3804 rc = t->get_conn_param(conn, param, buf); \ 3805 mutex_unlock(&conn->ep_mutex); \ 3806 return rc; \ 3807 } 3808 3809 #define iscsi_conn_ep_attr(field, param) \ 3810 iscsi_conn_ep_attr_show(param) \ 3811 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 3812 show_conn_ep_param_##param, NULL); 3813 3814 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 3815 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 3816 3817 static struct attribute *iscsi_conn_attrs[] = { 3818 &dev_attr_conn_max_recv_dlength.attr, 3819 &dev_attr_conn_max_xmit_dlength.attr, 3820 &dev_attr_conn_header_digest.attr, 3821 &dev_attr_conn_data_digest.attr, 3822 &dev_attr_conn_ifmarker.attr, 3823 &dev_attr_conn_ofmarker.attr, 3824 &dev_attr_conn_address.attr, 3825 &dev_attr_conn_port.attr, 3826 &dev_attr_conn_exp_statsn.attr, 3827 &dev_attr_conn_persistent_address.attr, 3828 &dev_attr_conn_persistent_port.attr, 3829 &dev_attr_conn_ping_tmo.attr, 3830 &dev_attr_conn_recv_tmo.attr, 3831 &dev_attr_conn_local_port.attr, 3832 &dev_attr_conn_statsn.attr, 3833 &dev_attr_conn_keepalive_tmo.attr, 3834 &dev_attr_conn_max_segment_size.attr, 3835 &dev_attr_conn_tcp_timestamp_stat.attr, 3836 &dev_attr_conn_tcp_wsf_disable.attr, 3837 &dev_attr_conn_tcp_nagle_disable.attr, 3838 &dev_attr_conn_tcp_timer_scale.attr, 3839 &dev_attr_conn_tcp_timestamp_enable.attr, 3840 &dev_attr_conn_fragment_disable.attr, 3841 &dev_attr_conn_ipv4_tos.attr, 3842 &dev_attr_conn_ipv6_traffic_class.attr, 3843 &dev_attr_conn_ipv6_flow_label.attr, 3844 &dev_attr_conn_is_fw_assigned_ipv6.attr, 3845 &dev_attr_conn_tcp_xmit_wsf.attr, 3846 &dev_attr_conn_tcp_recv_wsf.attr, 3847 &dev_attr_conn_local_ipaddr.attr, 3848 NULL, 3849 }; 3850 3851 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 3852 struct attribute *attr, int i) 3853 { 3854 struct device *cdev = container_of(kobj, struct device, kobj); 3855 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 3856 struct iscsi_transport *t = conn->transport; 3857 int param; 3858 3859 if (attr == &dev_attr_conn_max_recv_dlength.attr) 3860 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 3861 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 3862 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 3863 else if (attr == &dev_attr_conn_header_digest.attr) 3864 param = ISCSI_PARAM_HDRDGST_EN; 3865 else if (attr == &dev_attr_conn_data_digest.attr) 3866 param = ISCSI_PARAM_DATADGST_EN; 3867 else if (attr == &dev_attr_conn_ifmarker.attr) 3868 param = ISCSI_PARAM_IFMARKER_EN; 3869 else if (attr == &dev_attr_conn_ofmarker.attr) 3870 param = ISCSI_PARAM_OFMARKER_EN; 3871 else if (attr == &dev_attr_conn_address.attr) 3872 param = ISCSI_PARAM_CONN_ADDRESS; 3873 else if (attr == &dev_attr_conn_port.attr) 3874 param = ISCSI_PARAM_CONN_PORT; 3875 else if (attr == &dev_attr_conn_exp_statsn.attr) 3876 param = ISCSI_PARAM_EXP_STATSN; 3877 else if (attr == &dev_attr_conn_persistent_address.attr) 3878 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 3879 else if (attr == &dev_attr_conn_persistent_port.attr) 3880 param = ISCSI_PARAM_PERSISTENT_PORT; 3881 else if (attr == &dev_attr_conn_ping_tmo.attr) 3882 param = ISCSI_PARAM_PING_TMO; 3883 else if (attr == &dev_attr_conn_recv_tmo.attr) 3884 param = ISCSI_PARAM_RECV_TMO; 3885 else if (attr == &dev_attr_conn_local_port.attr) 3886 param = ISCSI_PARAM_LOCAL_PORT; 3887 else if (attr == &dev_attr_conn_statsn.attr) 3888 param = ISCSI_PARAM_STATSN; 3889 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 3890 param = ISCSI_PARAM_KEEPALIVE_TMO; 3891 else if (attr == &dev_attr_conn_max_segment_size.attr) 3892 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 3893 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 3894 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 3895 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 3896 param = ISCSI_PARAM_TCP_WSF_DISABLE; 3897 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 3898 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 3899 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 3900 param = ISCSI_PARAM_TCP_TIMER_SCALE; 3901 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 3902 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 3903 else if (attr == &dev_attr_conn_fragment_disable.attr) 3904 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 3905 else if (attr == &dev_attr_conn_ipv4_tos.attr) 3906 param = ISCSI_PARAM_IPV4_TOS; 3907 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 3908 param = ISCSI_PARAM_IPV6_TC; 3909 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 3910 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 3911 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 3912 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 3913 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 3914 param = ISCSI_PARAM_TCP_XMIT_WSF; 3915 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 3916 param = ISCSI_PARAM_TCP_RECV_WSF; 3917 else if (attr == &dev_attr_conn_local_ipaddr.attr) 3918 param = ISCSI_PARAM_LOCAL_IPADDR; 3919 else { 3920 WARN_ONCE(1, "Invalid conn attr"); 3921 return 0; 3922 } 3923 3924 return t->attr_is_visible(ISCSI_PARAM, param); 3925 } 3926 3927 static struct attribute_group iscsi_conn_group = { 3928 .attrs = iscsi_conn_attrs, 3929 .is_visible = iscsi_conn_attr_is_visible, 3930 }; 3931 3932 /* 3933 * iSCSI session attrs 3934 */ 3935 #define iscsi_session_attr_show(param, perm) \ 3936 static ssize_t \ 3937 show_session_param_##param(struct device *dev, \ 3938 struct device_attribute *attr, char *buf) \ 3939 { \ 3940 struct iscsi_cls_session *session = \ 3941 iscsi_dev_to_session(dev->parent); \ 3942 struct iscsi_transport *t = session->transport; \ 3943 \ 3944 if (perm && !capable(CAP_SYS_ADMIN)) \ 3945 return -EACCES; \ 3946 return t->get_session_param(session, param, buf); \ 3947 } 3948 3949 #define iscsi_session_attr(field, param, perm) \ 3950 iscsi_session_attr_show(param, perm) \ 3951 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 3952 NULL); 3953 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 3954 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 3955 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 3956 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 3957 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 3958 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 3959 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 3960 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 3961 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 3962 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 3963 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 3964 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 3965 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 3966 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 3967 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 3968 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 3969 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 3970 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 3971 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 3972 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 3973 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 3974 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 3975 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 3976 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 3977 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 3978 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 3979 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 3980 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 3981 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 3982 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 3983 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 3984 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 3985 iscsi_session_attr(discovery_auth_optional, 3986 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 3987 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 3988 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 3989 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 3990 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 3991 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 3992 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 3993 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 3994 3995 static ssize_t 3996 show_priv_session_state(struct device *dev, struct device_attribute *attr, 3997 char *buf) 3998 { 3999 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4000 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); 4001 } 4002 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4003 NULL); 4004 static ssize_t 4005 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4006 char *buf) 4007 { 4008 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4009 return sprintf(buf, "%d\n", session->creator); 4010 } 4011 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4012 NULL); 4013 static ssize_t 4014 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4015 char *buf) 4016 { 4017 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4018 return sprintf(buf, "%d\n", session->target_id); 4019 } 4020 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4021 show_priv_session_target_id, NULL); 4022 4023 #define iscsi_priv_session_attr_show(field, format) \ 4024 static ssize_t \ 4025 show_priv_session_##field(struct device *dev, \ 4026 struct device_attribute *attr, char *buf) \ 4027 { \ 4028 struct iscsi_cls_session *session = \ 4029 iscsi_dev_to_session(dev->parent); \ 4030 if (session->field == -1) \ 4031 return sprintf(buf, "off\n"); \ 4032 return sprintf(buf, format"\n", session->field); \ 4033 } 4034 4035 #define iscsi_priv_session_attr_store(field) \ 4036 static ssize_t \ 4037 store_priv_session_##field(struct device *dev, \ 4038 struct device_attribute *attr, \ 4039 const char *buf, size_t count) \ 4040 { \ 4041 int val; \ 4042 char *cp; \ 4043 struct iscsi_cls_session *session = \ 4044 iscsi_dev_to_session(dev->parent); \ 4045 if ((session->state == ISCSI_SESSION_FREE) || \ 4046 (session->state == ISCSI_SESSION_FAILED)) \ 4047 return -EBUSY; \ 4048 if (strncmp(buf, "off", 3) == 0) { \ 4049 session->field = -1; \ 4050 session->field##_sysfs_override = true; \ 4051 } else { \ 4052 val = simple_strtoul(buf, &cp, 0); \ 4053 if (*cp != '\0' && *cp != '\n') \ 4054 return -EINVAL; \ 4055 session->field = val; \ 4056 session->field##_sysfs_override = true; \ 4057 } \ 4058 return count; \ 4059 } 4060 4061 #define iscsi_priv_session_rw_attr(field, format) \ 4062 iscsi_priv_session_attr_show(field, format) \ 4063 iscsi_priv_session_attr_store(field) \ 4064 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4065 show_priv_session_##field, \ 4066 store_priv_session_##field) 4067 4068 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4069 4070 static struct attribute *iscsi_session_attrs[] = { 4071 &dev_attr_sess_initial_r2t.attr, 4072 &dev_attr_sess_max_outstanding_r2t.attr, 4073 &dev_attr_sess_immediate_data.attr, 4074 &dev_attr_sess_first_burst_len.attr, 4075 &dev_attr_sess_max_burst_len.attr, 4076 &dev_attr_sess_data_pdu_in_order.attr, 4077 &dev_attr_sess_data_seq_in_order.attr, 4078 &dev_attr_sess_erl.attr, 4079 &dev_attr_sess_targetname.attr, 4080 &dev_attr_sess_tpgt.attr, 4081 &dev_attr_sess_password.attr, 4082 &dev_attr_sess_password_in.attr, 4083 &dev_attr_sess_username.attr, 4084 &dev_attr_sess_username_in.attr, 4085 &dev_attr_sess_fast_abort.attr, 4086 &dev_attr_sess_abort_tmo.attr, 4087 &dev_attr_sess_lu_reset_tmo.attr, 4088 &dev_attr_sess_tgt_reset_tmo.attr, 4089 &dev_attr_sess_ifacename.attr, 4090 &dev_attr_sess_initiatorname.attr, 4091 &dev_attr_sess_targetalias.attr, 4092 &dev_attr_sess_boot_root.attr, 4093 &dev_attr_sess_boot_nic.attr, 4094 &dev_attr_sess_boot_target.attr, 4095 &dev_attr_priv_sess_recovery_tmo.attr, 4096 &dev_attr_priv_sess_state.attr, 4097 &dev_attr_priv_sess_creator.attr, 4098 &dev_attr_sess_chap_out_idx.attr, 4099 &dev_attr_sess_chap_in_idx.attr, 4100 &dev_attr_priv_sess_target_id.attr, 4101 &dev_attr_sess_auto_snd_tgt_disable.attr, 4102 &dev_attr_sess_discovery_session.attr, 4103 &dev_attr_sess_portal_type.attr, 4104 &dev_attr_sess_chap_auth.attr, 4105 &dev_attr_sess_discovery_logout.attr, 4106 &dev_attr_sess_bidi_chap.attr, 4107 &dev_attr_sess_discovery_auth_optional.attr, 4108 &dev_attr_sess_def_time2wait.attr, 4109 &dev_attr_sess_def_time2retain.attr, 4110 &dev_attr_sess_isid.attr, 4111 &dev_attr_sess_tsid.attr, 4112 &dev_attr_sess_def_taskmgmt_tmo.attr, 4113 &dev_attr_sess_discovery_parent_idx.attr, 4114 &dev_attr_sess_discovery_parent_type.attr, 4115 NULL, 4116 }; 4117 4118 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4119 struct attribute *attr, int i) 4120 { 4121 struct device *cdev = container_of(kobj, struct device, kobj); 4122 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4123 struct iscsi_transport *t = session->transport; 4124 int param; 4125 4126 if (attr == &dev_attr_sess_initial_r2t.attr) 4127 param = ISCSI_PARAM_INITIAL_R2T_EN; 4128 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4129 param = ISCSI_PARAM_MAX_R2T; 4130 else if (attr == &dev_attr_sess_immediate_data.attr) 4131 param = ISCSI_PARAM_IMM_DATA_EN; 4132 else if (attr == &dev_attr_sess_first_burst_len.attr) 4133 param = ISCSI_PARAM_FIRST_BURST; 4134 else if (attr == &dev_attr_sess_max_burst_len.attr) 4135 param = ISCSI_PARAM_MAX_BURST; 4136 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4137 param = ISCSI_PARAM_PDU_INORDER_EN; 4138 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4139 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4140 else if (attr == &dev_attr_sess_erl.attr) 4141 param = ISCSI_PARAM_ERL; 4142 else if (attr == &dev_attr_sess_targetname.attr) 4143 param = ISCSI_PARAM_TARGET_NAME; 4144 else if (attr == &dev_attr_sess_tpgt.attr) 4145 param = ISCSI_PARAM_TPGT; 4146 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4147 param = ISCSI_PARAM_CHAP_IN_IDX; 4148 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4149 param = ISCSI_PARAM_CHAP_OUT_IDX; 4150 else if (attr == &dev_attr_sess_password.attr) 4151 param = ISCSI_PARAM_USERNAME; 4152 else if (attr == &dev_attr_sess_password_in.attr) 4153 param = ISCSI_PARAM_USERNAME_IN; 4154 else if (attr == &dev_attr_sess_username.attr) 4155 param = ISCSI_PARAM_PASSWORD; 4156 else if (attr == &dev_attr_sess_username_in.attr) 4157 param = ISCSI_PARAM_PASSWORD_IN; 4158 else if (attr == &dev_attr_sess_fast_abort.attr) 4159 param = ISCSI_PARAM_FAST_ABORT; 4160 else if (attr == &dev_attr_sess_abort_tmo.attr) 4161 param = ISCSI_PARAM_ABORT_TMO; 4162 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4163 param = ISCSI_PARAM_LU_RESET_TMO; 4164 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4165 param = ISCSI_PARAM_TGT_RESET_TMO; 4166 else if (attr == &dev_attr_sess_ifacename.attr) 4167 param = ISCSI_PARAM_IFACE_NAME; 4168 else if (attr == &dev_attr_sess_initiatorname.attr) 4169 param = ISCSI_PARAM_INITIATOR_NAME; 4170 else if (attr == &dev_attr_sess_targetalias.attr) 4171 param = ISCSI_PARAM_TARGET_ALIAS; 4172 else if (attr == &dev_attr_sess_boot_root.attr) 4173 param = ISCSI_PARAM_BOOT_ROOT; 4174 else if (attr == &dev_attr_sess_boot_nic.attr) 4175 param = ISCSI_PARAM_BOOT_NIC; 4176 else if (attr == &dev_attr_sess_boot_target.attr) 4177 param = ISCSI_PARAM_BOOT_TARGET; 4178 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4179 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4180 else if (attr == &dev_attr_sess_discovery_session.attr) 4181 param = ISCSI_PARAM_DISCOVERY_SESS; 4182 else if (attr == &dev_attr_sess_portal_type.attr) 4183 param = ISCSI_PARAM_PORTAL_TYPE; 4184 else if (attr == &dev_attr_sess_chap_auth.attr) 4185 param = ISCSI_PARAM_CHAP_AUTH_EN; 4186 else if (attr == &dev_attr_sess_discovery_logout.attr) 4187 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4188 else if (attr == &dev_attr_sess_bidi_chap.attr) 4189 param = ISCSI_PARAM_BIDI_CHAP_EN; 4190 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4191 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4192 else if (attr == &dev_attr_sess_def_time2wait.attr) 4193 param = ISCSI_PARAM_DEF_TIME2WAIT; 4194 else if (attr == &dev_attr_sess_def_time2retain.attr) 4195 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4196 else if (attr == &dev_attr_sess_isid.attr) 4197 param = ISCSI_PARAM_ISID; 4198 else if (attr == &dev_attr_sess_tsid.attr) 4199 param = ISCSI_PARAM_TSID; 4200 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4201 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4202 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4203 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4204 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4205 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4206 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4207 return S_IRUGO | S_IWUSR; 4208 else if (attr == &dev_attr_priv_sess_state.attr) 4209 return S_IRUGO; 4210 else if (attr == &dev_attr_priv_sess_creator.attr) 4211 return S_IRUGO; 4212 else if (attr == &dev_attr_priv_sess_target_id.attr) 4213 return S_IRUGO; 4214 else { 4215 WARN_ONCE(1, "Invalid session attr"); 4216 return 0; 4217 } 4218 4219 return t->attr_is_visible(ISCSI_PARAM, param); 4220 } 4221 4222 static struct attribute_group iscsi_session_group = { 4223 .attrs = iscsi_session_attrs, 4224 .is_visible = iscsi_session_attr_is_visible, 4225 }; 4226 4227 /* 4228 * iSCSI host attrs 4229 */ 4230 #define iscsi_host_attr_show(param) \ 4231 static ssize_t \ 4232 show_host_param_##param(struct device *dev, \ 4233 struct device_attribute *attr, char *buf) \ 4234 { \ 4235 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4236 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4237 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4238 } 4239 4240 #define iscsi_host_attr(field, param) \ 4241 iscsi_host_attr_show(param) \ 4242 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4243 NULL); 4244 4245 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4246 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4247 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4248 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4249 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4250 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4251 4252 static struct attribute *iscsi_host_attrs[] = { 4253 &dev_attr_host_netdev.attr, 4254 &dev_attr_host_hwaddress.attr, 4255 &dev_attr_host_ipaddress.attr, 4256 &dev_attr_host_initiatorname.attr, 4257 &dev_attr_host_port_state.attr, 4258 &dev_attr_host_port_speed.attr, 4259 NULL, 4260 }; 4261 4262 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4263 struct attribute *attr, int i) 4264 { 4265 struct device *cdev = container_of(kobj, struct device, kobj); 4266 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4267 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4268 int param; 4269 4270 if (attr == &dev_attr_host_netdev.attr) 4271 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4272 else if (attr == &dev_attr_host_hwaddress.attr) 4273 param = ISCSI_HOST_PARAM_HWADDRESS; 4274 else if (attr == &dev_attr_host_ipaddress.attr) 4275 param = ISCSI_HOST_PARAM_IPADDRESS; 4276 else if (attr == &dev_attr_host_initiatorname.attr) 4277 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4278 else if (attr == &dev_attr_host_port_state.attr) 4279 param = ISCSI_HOST_PARAM_PORT_STATE; 4280 else if (attr == &dev_attr_host_port_speed.attr) 4281 param = ISCSI_HOST_PARAM_PORT_SPEED; 4282 else { 4283 WARN_ONCE(1, "Invalid host attr"); 4284 return 0; 4285 } 4286 4287 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4288 } 4289 4290 static struct attribute_group iscsi_host_group = { 4291 .attrs = iscsi_host_attrs, 4292 .is_visible = iscsi_host_attr_is_visible, 4293 }; 4294 4295 /* convert iscsi_port_speed values to ascii string name */ 4296 static const struct { 4297 enum iscsi_port_speed value; 4298 char *name; 4299 } iscsi_port_speed_names[] = { 4300 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4301 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4302 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4303 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4304 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4305 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4306 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4307 }; 4308 4309 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4310 { 4311 int i; 4312 char *speed = "Unknown!"; 4313 struct iscsi_cls_host *ihost = shost->shost_data; 4314 uint32_t port_speed = ihost->port_speed; 4315 4316 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4317 if (iscsi_port_speed_names[i].value & port_speed) { 4318 speed = iscsi_port_speed_names[i].name; 4319 break; 4320 } 4321 } 4322 return speed; 4323 } 4324 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4325 4326 /* convert iscsi_port_state values to ascii string name */ 4327 static const struct { 4328 enum iscsi_port_state value; 4329 char *name; 4330 } iscsi_port_state_names[] = { 4331 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4332 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4333 }; 4334 4335 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4336 { 4337 int i; 4338 char *state = "Unknown!"; 4339 struct iscsi_cls_host *ihost = shost->shost_data; 4340 uint32_t port_state = ihost->port_state; 4341 4342 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4343 if (iscsi_port_state_names[i].value & port_state) { 4344 state = iscsi_port_state_names[i].name; 4345 break; 4346 } 4347 } 4348 return state; 4349 } 4350 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4351 4352 static int iscsi_session_match(struct attribute_container *cont, 4353 struct device *dev) 4354 { 4355 struct iscsi_cls_session *session; 4356 struct Scsi_Host *shost; 4357 struct iscsi_internal *priv; 4358 4359 if (!iscsi_is_session_dev(dev)) 4360 return 0; 4361 4362 session = iscsi_dev_to_session(dev); 4363 shost = iscsi_session_to_shost(session); 4364 if (!shost->transportt) 4365 return 0; 4366 4367 priv = to_iscsi_internal(shost->transportt); 4368 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4369 return 0; 4370 4371 return &priv->session_cont.ac == cont; 4372 } 4373 4374 static int iscsi_conn_match(struct attribute_container *cont, 4375 struct device *dev) 4376 { 4377 struct iscsi_cls_session *session; 4378 struct iscsi_cls_conn *conn; 4379 struct Scsi_Host *shost; 4380 struct iscsi_internal *priv; 4381 4382 if (!iscsi_is_conn_dev(dev)) 4383 return 0; 4384 4385 conn = iscsi_dev_to_conn(dev); 4386 session = iscsi_dev_to_session(conn->dev.parent); 4387 shost = iscsi_session_to_shost(session); 4388 4389 if (!shost->transportt) 4390 return 0; 4391 4392 priv = to_iscsi_internal(shost->transportt); 4393 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4394 return 0; 4395 4396 return &priv->conn_cont.ac == cont; 4397 } 4398 4399 static int iscsi_host_match(struct attribute_container *cont, 4400 struct device *dev) 4401 { 4402 struct Scsi_Host *shost; 4403 struct iscsi_internal *priv; 4404 4405 if (!scsi_is_host_device(dev)) 4406 return 0; 4407 4408 shost = dev_to_shost(dev); 4409 if (!shost->transportt || 4410 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4411 return 0; 4412 4413 priv = to_iscsi_internal(shost->transportt); 4414 return &priv->t.host_attrs.ac == cont; 4415 } 4416 4417 struct scsi_transport_template * 4418 iscsi_register_transport(struct iscsi_transport *tt) 4419 { 4420 struct iscsi_internal *priv; 4421 unsigned long flags; 4422 int err; 4423 4424 BUG_ON(!tt); 4425 4426 priv = iscsi_if_transport_lookup(tt); 4427 if (priv) 4428 return NULL; 4429 4430 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4431 if (!priv) 4432 return NULL; 4433 INIT_LIST_HEAD(&priv->list); 4434 priv->iscsi_transport = tt; 4435 priv->t.user_scan = iscsi_user_scan; 4436 priv->t.create_work_queue = 1; 4437 4438 priv->dev.class = &iscsi_transport_class; 4439 dev_set_name(&priv->dev, "%s", tt->name); 4440 err = device_register(&priv->dev); 4441 if (err) 4442 goto free_priv; 4443 4444 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4445 if (err) 4446 goto unregister_dev; 4447 4448 /* host parameters */ 4449 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4450 priv->t.host_attrs.ac.match = iscsi_host_match; 4451 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4452 priv->t.host_size = sizeof(struct iscsi_cls_host); 4453 transport_container_register(&priv->t.host_attrs); 4454 4455 /* connection parameters */ 4456 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4457 priv->conn_cont.ac.match = iscsi_conn_match; 4458 priv->conn_cont.ac.grp = &iscsi_conn_group; 4459 transport_container_register(&priv->conn_cont); 4460 4461 /* session parameters */ 4462 priv->session_cont.ac.class = &iscsi_session_class.class; 4463 priv->session_cont.ac.match = iscsi_session_match; 4464 priv->session_cont.ac.grp = &iscsi_session_group; 4465 transport_container_register(&priv->session_cont); 4466 4467 spin_lock_irqsave(&iscsi_transport_lock, flags); 4468 list_add(&priv->list, &iscsi_transports); 4469 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4470 4471 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4472 return &priv->t; 4473 4474 unregister_dev: 4475 device_unregister(&priv->dev); 4476 return NULL; 4477 free_priv: 4478 kfree(priv); 4479 return NULL; 4480 } 4481 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4482 4483 int iscsi_unregister_transport(struct iscsi_transport *tt) 4484 { 4485 struct iscsi_internal *priv; 4486 unsigned long flags; 4487 4488 BUG_ON(!tt); 4489 4490 mutex_lock(&rx_queue_mutex); 4491 4492 priv = iscsi_if_transport_lookup(tt); 4493 BUG_ON (!priv); 4494 4495 spin_lock_irqsave(&iscsi_transport_lock, flags); 4496 list_del(&priv->list); 4497 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4498 4499 transport_container_unregister(&priv->conn_cont); 4500 transport_container_unregister(&priv->session_cont); 4501 transport_container_unregister(&priv->t.host_attrs); 4502 4503 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4504 device_unregister(&priv->dev); 4505 mutex_unlock(&rx_queue_mutex); 4506 4507 return 0; 4508 } 4509 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4510 4511 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4512 struct device *dev, const char *fmt, ...) 4513 { 4514 struct va_format vaf; 4515 va_list args; 4516 4517 va_start(args, fmt); 4518 vaf.fmt = fmt; 4519 vaf.va = &args; 4520 trace(dev, &vaf); 4521 va_end(args); 4522 } 4523 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4524 4525 static __init int iscsi_transport_init(void) 4526 { 4527 int err; 4528 struct netlink_kernel_cfg cfg = { 4529 .groups = 1, 4530 .input = iscsi_if_rx, 4531 }; 4532 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4533 ISCSI_TRANSPORT_VERSION); 4534 4535 atomic_set(&iscsi_session_nr, 0); 4536 4537 err = class_register(&iscsi_transport_class); 4538 if (err) 4539 return err; 4540 4541 err = class_register(&iscsi_endpoint_class); 4542 if (err) 4543 goto unregister_transport_class; 4544 4545 err = class_register(&iscsi_iface_class); 4546 if (err) 4547 goto unregister_endpoint_class; 4548 4549 err = transport_class_register(&iscsi_host_class); 4550 if (err) 4551 goto unregister_iface_class; 4552 4553 err = transport_class_register(&iscsi_connection_class); 4554 if (err) 4555 goto unregister_host_class; 4556 4557 err = transport_class_register(&iscsi_session_class); 4558 if (err) 4559 goto unregister_conn_class; 4560 4561 err = bus_register(&iscsi_flashnode_bus); 4562 if (err) 4563 goto unregister_session_class; 4564 4565 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4566 if (!nls) { 4567 err = -ENOBUFS; 4568 goto unregister_flashnode_bus; 4569 } 4570 4571 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); 4572 if (!iscsi_eh_timer_workq) { 4573 err = -ENOMEM; 4574 goto release_nls; 4575 } 4576 4577 return 0; 4578 4579 release_nls: 4580 netlink_kernel_release(nls); 4581 unregister_flashnode_bus: 4582 bus_unregister(&iscsi_flashnode_bus); 4583 unregister_session_class: 4584 transport_class_unregister(&iscsi_session_class); 4585 unregister_conn_class: 4586 transport_class_unregister(&iscsi_connection_class); 4587 unregister_host_class: 4588 transport_class_unregister(&iscsi_host_class); 4589 unregister_iface_class: 4590 class_unregister(&iscsi_iface_class); 4591 unregister_endpoint_class: 4592 class_unregister(&iscsi_endpoint_class); 4593 unregister_transport_class: 4594 class_unregister(&iscsi_transport_class); 4595 return err; 4596 } 4597 4598 static void __exit iscsi_transport_exit(void) 4599 { 4600 destroy_workqueue(iscsi_eh_timer_workq); 4601 netlink_kernel_release(nls); 4602 bus_unregister(&iscsi_flashnode_bus); 4603 transport_class_unregister(&iscsi_connection_class); 4604 transport_class_unregister(&iscsi_session_class); 4605 transport_class_unregister(&iscsi_host_class); 4606 class_unregister(&iscsi_endpoint_class); 4607 class_unregister(&iscsi_iface_class); 4608 class_unregister(&iscsi_transport_class); 4609 } 4610 4611 module_init(iscsi_transport_init); 4612 module_exit(iscsi_transport_exit); 4613 4614 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4615 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4616 "Alex Aizman <itn780@yahoo.com>"); 4617 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4618 MODULE_LICENSE("GPL"); 4619 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4620 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4621