1 /* 2 * iSCSI transport class definitions 3 * 4 * Copyright (C) IBM Corporation, 2004 5 * Copyright (C) Mike Christie, 2004 - 2005 6 * Copyright (C) Dmitry Yusupov, 2004 - 2005 7 * Copyright (C) Alex Aizman, 2004 - 2005 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 22 */ 23 #include <linux/module.h> 24 #include <linux/mutex.h> 25 #include <linux/slab.h> 26 #include <linux/bsg-lib.h> 27 #include <linux/idr.h> 28 #include <net/tcp.h> 29 #include <scsi/scsi.h> 30 #include <scsi/scsi_host.h> 31 #include <scsi/scsi_device.h> 32 #include <scsi/scsi_transport.h> 33 #include <scsi/scsi_transport_iscsi.h> 34 #include <scsi/iscsi_if.h> 35 #include <scsi/scsi_cmnd.h> 36 #include <scsi/scsi_bsg_iscsi.h> 37 38 #define ISCSI_TRANSPORT_VERSION "2.0-870" 39 40 #define CREATE_TRACE_POINTS 41 #include <trace/events/iscsi.h> 42 43 /* 44 * Export tracepoint symbols to be used by other modules. 45 */ 46 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn); 47 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh); 48 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session); 49 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp); 50 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp); 51 52 static int dbg_session; 53 module_param_named(debug_session, dbg_session, int, 54 S_IRUGO | S_IWUSR); 55 MODULE_PARM_DESC(debug_session, 56 "Turn on debugging for sessions in scsi_transport_iscsi " 57 "module. Set to 1 to turn on, and zero to turn off. Default " 58 "is off."); 59 60 static int dbg_conn; 61 module_param_named(debug_conn, dbg_conn, int, 62 S_IRUGO | S_IWUSR); 63 MODULE_PARM_DESC(debug_conn, 64 "Turn on debugging for connections in scsi_transport_iscsi " 65 "module. Set to 1 to turn on, and zero to turn off. Default " 66 "is off."); 67 68 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ 69 do { \ 70 if (dbg_session) \ 71 iscsi_cls_session_printk(KERN_INFO, _session, \ 72 "%s: " dbg_fmt, \ 73 __func__, ##arg); \ 74 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \ 75 &(_session)->dev, \ 76 "%s " dbg_fmt, __func__, ##arg); \ 77 } while (0); 78 79 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ 80 do { \ 81 if (dbg_conn) \ 82 iscsi_cls_conn_printk(KERN_INFO, _conn, \ 83 "%s: " dbg_fmt, \ 84 __func__, ##arg); \ 85 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \ 86 &(_conn)->dev, \ 87 "%s " dbg_fmt, __func__, ##arg); \ 88 } while (0); 89 90 struct iscsi_internal { 91 struct scsi_transport_template t; 92 struct iscsi_transport *iscsi_transport; 93 struct list_head list; 94 struct device dev; 95 96 struct transport_container conn_cont; 97 struct transport_container session_cont; 98 }; 99 100 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ 101 static struct workqueue_struct *iscsi_eh_timer_workq; 102 103 static DEFINE_IDA(iscsi_sess_ida); 104 /* 105 * list of registered transports and lock that must 106 * be held while accessing list. The iscsi_transport_lock must 107 * be acquired after the rx_queue_mutex. 108 */ 109 static LIST_HEAD(iscsi_transports); 110 static DEFINE_SPINLOCK(iscsi_transport_lock); 111 112 #define to_iscsi_internal(tmpl) \ 113 container_of(tmpl, struct iscsi_internal, t) 114 115 #define dev_to_iscsi_internal(_dev) \ 116 container_of(_dev, struct iscsi_internal, dev) 117 118 static void iscsi_transport_release(struct device *dev) 119 { 120 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 121 kfree(priv); 122 } 123 124 /* 125 * iscsi_transport_class represents the iscsi_transports that are 126 * registered. 127 */ 128 static struct class iscsi_transport_class = { 129 .name = "iscsi_transport", 130 .dev_release = iscsi_transport_release, 131 }; 132 133 static ssize_t 134 show_transport_handle(struct device *dev, struct device_attribute *attr, 135 char *buf) 136 { 137 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 138 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); 139 } 140 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); 141 142 #define show_transport_attr(name, format) \ 143 static ssize_t \ 144 show_transport_##name(struct device *dev, \ 145 struct device_attribute *attr,char *buf) \ 146 { \ 147 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ 148 return sprintf(buf, format"\n", priv->iscsi_transport->name); \ 149 } \ 150 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); 151 152 show_transport_attr(caps, "0x%x"); 153 154 static struct attribute *iscsi_transport_attrs[] = { 155 &dev_attr_handle.attr, 156 &dev_attr_caps.attr, 157 NULL, 158 }; 159 160 static struct attribute_group iscsi_transport_group = { 161 .attrs = iscsi_transport_attrs, 162 }; 163 164 /* 165 * iSCSI endpoint attrs 166 */ 167 #define iscsi_dev_to_endpoint(_dev) \ 168 container_of(_dev, struct iscsi_endpoint, dev) 169 170 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ 171 struct device_attribute dev_attr_##_prefix##_##_name = \ 172 __ATTR(_name,_mode,_show,_store) 173 174 static void iscsi_endpoint_release(struct device *dev) 175 { 176 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 177 kfree(ep); 178 } 179 180 static struct class iscsi_endpoint_class = { 181 .name = "iscsi_endpoint", 182 .dev_release = iscsi_endpoint_release, 183 }; 184 185 static ssize_t 186 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) 187 { 188 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 189 return sprintf(buf, "%llu\n", (unsigned long long) ep->id); 190 } 191 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); 192 193 static struct attribute *iscsi_endpoint_attrs[] = { 194 &dev_attr_ep_handle.attr, 195 NULL, 196 }; 197 198 static struct attribute_group iscsi_endpoint_group = { 199 .attrs = iscsi_endpoint_attrs, 200 }; 201 202 #define ISCSI_MAX_EPID -1 203 204 static int iscsi_match_epid(struct device *dev, const void *data) 205 { 206 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 207 const uint64_t *epid = data; 208 209 return *epid == ep->id; 210 } 211 212 struct iscsi_endpoint * 213 iscsi_create_endpoint(int dd_size) 214 { 215 struct device *dev; 216 struct iscsi_endpoint *ep; 217 uint64_t id; 218 int err; 219 220 for (id = 1; id < ISCSI_MAX_EPID; id++) { 221 dev = class_find_device(&iscsi_endpoint_class, NULL, &id, 222 iscsi_match_epid); 223 if (!dev) 224 break; 225 else 226 put_device(dev); 227 } 228 if (id == ISCSI_MAX_EPID) { 229 printk(KERN_ERR "Too many connections. Max supported %u\n", 230 ISCSI_MAX_EPID - 1); 231 return NULL; 232 } 233 234 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); 235 if (!ep) 236 return NULL; 237 238 ep->id = id; 239 ep->dev.class = &iscsi_endpoint_class; 240 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); 241 err = device_register(&ep->dev); 242 if (err) 243 goto free_ep; 244 245 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); 246 if (err) 247 goto unregister_dev; 248 249 if (dd_size) 250 ep->dd_data = &ep[1]; 251 return ep; 252 253 unregister_dev: 254 device_unregister(&ep->dev); 255 return NULL; 256 257 free_ep: 258 kfree(ep); 259 return NULL; 260 } 261 EXPORT_SYMBOL_GPL(iscsi_create_endpoint); 262 263 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) 264 { 265 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); 266 device_unregister(&ep->dev); 267 } 268 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); 269 270 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 271 { 272 struct iscsi_endpoint *ep; 273 struct device *dev; 274 275 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, 276 iscsi_match_epid); 277 if (!dev) 278 return NULL; 279 280 ep = iscsi_dev_to_endpoint(dev); 281 /* 282 * we can drop this now because the interface will prevent 283 * removals and lookups from racing. 284 */ 285 put_device(dev); 286 return ep; 287 } 288 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 289 290 /* 291 * Interface to display network param to sysfs 292 */ 293 294 static void iscsi_iface_release(struct device *dev) 295 { 296 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 297 struct device *parent = iface->dev.parent; 298 299 kfree(iface); 300 put_device(parent); 301 } 302 303 304 static struct class iscsi_iface_class = { 305 .name = "iscsi_iface", 306 .dev_release = iscsi_iface_release, 307 }; 308 309 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 310 struct device_attribute dev_attr_##_prefix##_##_name = \ 311 __ATTR(_name, _mode, _show, _store) 312 313 /* iface attrs show */ 314 #define iscsi_iface_attr_show(type, name, param_type, param) \ 315 static ssize_t \ 316 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 317 char *buf) \ 318 { \ 319 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 320 struct iscsi_transport *t = iface->transport; \ 321 return t->get_iface_param(iface, param_type, param, buf); \ 322 } \ 323 324 #define iscsi_iface_net_attr(type, name, param) \ 325 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 326 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 327 328 #define iscsi_iface_attr(type, name, param) \ 329 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 330 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 331 332 /* generic read only ipv4 attribute */ 333 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 334 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 335 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 336 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 337 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 338 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 339 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 340 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 341 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 342 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 343 iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 344 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 345 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 346 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 347 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 348 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 349 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 350 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 351 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 352 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 353 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 354 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 355 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 356 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 357 iscsi_iface_net_attr(ipv4_iface, fragment_disable, 358 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 359 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 360 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 361 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 362 363 /* generic read only ipv6 attribute */ 364 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 365 iscsi_iface_net_attr(ipv6_iface, link_local_addr, 366 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 367 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 368 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 369 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 370 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 371 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 372 iscsi_iface_net_attr(ipv6_iface, link_local_state, 373 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 374 iscsi_iface_net_attr(ipv6_iface, router_state, 375 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 376 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 377 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 378 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 379 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 380 iscsi_iface_net_attr(ipv6_iface, traffic_class, 381 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 382 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 383 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 384 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 385 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 386 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 387 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 388 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 389 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 390 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 391 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 392 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 393 394 /* common read only iface attribute */ 395 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 396 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 397 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 398 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 399 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 400 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 401 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 402 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 403 iscsi_iface_net_attr(iface, tcp_nagle_disable, 404 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 405 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 406 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 407 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 408 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 409 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 410 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 411 412 /* common iscsi specific settings attributes */ 413 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 414 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 415 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 416 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 417 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 418 iscsi_iface_attr(iface, data_seq_in_order, 419 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 420 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 421 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 422 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 423 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 424 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 425 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 426 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 427 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 428 iscsi_iface_attr(iface, discovery_auth_optional, 429 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 430 iscsi_iface_attr(iface, discovery_logout, 431 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 432 iscsi_iface_attr(iface, strict_login_comp_en, 433 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 434 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 435 436 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 437 struct attribute *attr, int i) 438 { 439 struct device *dev = container_of(kobj, struct device, kobj); 440 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 441 struct iscsi_transport *t = iface->transport; 442 int param; 443 int param_type; 444 445 if (attr == &dev_attr_iface_enabled.attr) 446 param = ISCSI_NET_PARAM_IFACE_ENABLE; 447 else if (attr == &dev_attr_iface_vlan_id.attr) 448 param = ISCSI_NET_PARAM_VLAN_ID; 449 else if (attr == &dev_attr_iface_vlan_priority.attr) 450 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 451 else if (attr == &dev_attr_iface_vlan_enabled.attr) 452 param = ISCSI_NET_PARAM_VLAN_ENABLED; 453 else if (attr == &dev_attr_iface_mtu.attr) 454 param = ISCSI_NET_PARAM_MTU; 455 else if (attr == &dev_attr_iface_port.attr) 456 param = ISCSI_NET_PARAM_PORT; 457 else if (attr == &dev_attr_iface_ipaddress_state.attr) 458 param = ISCSI_NET_PARAM_IPADDR_STATE; 459 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 460 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 461 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 462 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 463 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 464 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 465 else if (attr == &dev_attr_iface_tcp_wsf.attr) 466 param = ISCSI_NET_PARAM_TCP_WSF; 467 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 468 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 469 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 470 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 471 else if (attr == &dev_attr_iface_cache_id.attr) 472 param = ISCSI_NET_PARAM_CACHE_ID; 473 else if (attr == &dev_attr_iface_redirect_en.attr) 474 param = ISCSI_NET_PARAM_REDIRECT_EN; 475 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 476 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 477 else if (attr == &dev_attr_iface_header_digest.attr) 478 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 479 else if (attr == &dev_attr_iface_data_digest.attr) 480 param = ISCSI_IFACE_PARAM_DATADGST_EN; 481 else if (attr == &dev_attr_iface_immediate_data.attr) 482 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 483 else if (attr == &dev_attr_iface_initial_r2t.attr) 484 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 485 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 486 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 487 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 488 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 489 else if (attr == &dev_attr_iface_erl.attr) 490 param = ISCSI_IFACE_PARAM_ERL; 491 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 492 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 493 else if (attr == &dev_attr_iface_first_burst_len.attr) 494 param = ISCSI_IFACE_PARAM_FIRST_BURST; 495 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 496 param = ISCSI_IFACE_PARAM_MAX_R2T; 497 else if (attr == &dev_attr_iface_max_burst_len.attr) 498 param = ISCSI_IFACE_PARAM_MAX_BURST; 499 else if (attr == &dev_attr_iface_chap_auth.attr) 500 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 501 else if (attr == &dev_attr_iface_bidi_chap.attr) 502 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 503 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 504 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 505 else if (attr == &dev_attr_iface_discovery_logout.attr) 506 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 507 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 508 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 509 else if (attr == &dev_attr_iface_initiator_name.attr) 510 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 511 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 512 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 513 param = ISCSI_NET_PARAM_IPV4_ADDR; 514 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 515 param = ISCSI_NET_PARAM_IPV4_GW; 516 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 517 param = ISCSI_NET_PARAM_IPV4_SUBNET; 518 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 519 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 520 else if (attr == 521 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 522 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 523 else if (attr == 524 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 525 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 526 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 527 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 528 else if (attr == &dev_attr_ipv4_iface_tos.attr) 529 param = ISCSI_NET_PARAM_IPV4_TOS; 530 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 531 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 532 else if (attr == 533 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 534 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 535 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 536 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 537 else if (attr == 538 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 539 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 540 else if (attr == 541 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 542 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 543 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 544 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 545 else if (attr == 546 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 547 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 548 else if (attr == 549 &dev_attr_ipv4_iface_fragment_disable.attr) 550 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 551 else if (attr == 552 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 553 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 554 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 555 param = ISCSI_NET_PARAM_IPV4_TTL; 556 else 557 return 0; 558 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 559 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 560 param = ISCSI_NET_PARAM_IPV6_ADDR; 561 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 562 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 563 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 564 param = ISCSI_NET_PARAM_IPV6_ROUTER; 565 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 566 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 567 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 568 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 569 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 570 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 571 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 572 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 573 else if (attr == 574 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 575 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 576 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 577 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 578 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 579 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 580 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 581 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 582 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 583 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 584 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 585 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 586 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 587 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 588 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 589 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 590 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 591 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 592 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 593 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 594 else 595 return 0; 596 } else { 597 WARN_ONCE(1, "Invalid iface attr"); 598 return 0; 599 } 600 601 switch (param) { 602 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO: 603 case ISCSI_IFACE_PARAM_HDRDGST_EN: 604 case ISCSI_IFACE_PARAM_DATADGST_EN: 605 case ISCSI_IFACE_PARAM_IMM_DATA_EN: 606 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN: 607 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN: 608 case ISCSI_IFACE_PARAM_PDU_INORDER_EN: 609 case ISCSI_IFACE_PARAM_ERL: 610 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH: 611 case ISCSI_IFACE_PARAM_FIRST_BURST: 612 case ISCSI_IFACE_PARAM_MAX_R2T: 613 case ISCSI_IFACE_PARAM_MAX_BURST: 614 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN: 615 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN: 616 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL: 617 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN: 618 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN: 619 case ISCSI_IFACE_PARAM_INITIATOR_NAME: 620 param_type = ISCSI_IFACE_PARAM; 621 break; 622 default: 623 param_type = ISCSI_NET_PARAM; 624 } 625 626 return t->attr_is_visible(param_type, param); 627 } 628 629 static struct attribute *iscsi_iface_attrs[] = { 630 &dev_attr_iface_enabled.attr, 631 &dev_attr_iface_vlan_id.attr, 632 &dev_attr_iface_vlan_priority.attr, 633 &dev_attr_iface_vlan_enabled.attr, 634 &dev_attr_ipv4_iface_ipaddress.attr, 635 &dev_attr_ipv4_iface_gateway.attr, 636 &dev_attr_ipv4_iface_subnet.attr, 637 &dev_attr_ipv4_iface_bootproto.attr, 638 &dev_attr_ipv6_iface_ipaddress.attr, 639 &dev_attr_ipv6_iface_link_local_addr.attr, 640 &dev_attr_ipv6_iface_router_addr.attr, 641 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 642 &dev_attr_ipv6_iface_link_local_autocfg.attr, 643 &dev_attr_iface_mtu.attr, 644 &dev_attr_iface_port.attr, 645 &dev_attr_iface_ipaddress_state.attr, 646 &dev_attr_iface_delayed_ack_en.attr, 647 &dev_attr_iface_tcp_nagle_disable.attr, 648 &dev_attr_iface_tcp_wsf_disable.attr, 649 &dev_attr_iface_tcp_wsf.attr, 650 &dev_attr_iface_tcp_timer_scale.attr, 651 &dev_attr_iface_tcp_timestamp_en.attr, 652 &dev_attr_iface_cache_id.attr, 653 &dev_attr_iface_redirect_en.attr, 654 &dev_attr_iface_def_taskmgmt_tmo.attr, 655 &dev_attr_iface_header_digest.attr, 656 &dev_attr_iface_data_digest.attr, 657 &dev_attr_iface_immediate_data.attr, 658 &dev_attr_iface_initial_r2t.attr, 659 &dev_attr_iface_data_seq_in_order.attr, 660 &dev_attr_iface_data_pdu_in_order.attr, 661 &dev_attr_iface_erl.attr, 662 &dev_attr_iface_max_recv_dlength.attr, 663 &dev_attr_iface_first_burst_len.attr, 664 &dev_attr_iface_max_outstanding_r2t.attr, 665 &dev_attr_iface_max_burst_len.attr, 666 &dev_attr_iface_chap_auth.attr, 667 &dev_attr_iface_bidi_chap.attr, 668 &dev_attr_iface_discovery_auth_optional.attr, 669 &dev_attr_iface_discovery_logout.attr, 670 &dev_attr_iface_strict_login_comp_en.attr, 671 &dev_attr_iface_initiator_name.attr, 672 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 673 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 674 &dev_attr_ipv4_iface_tos_en.attr, 675 &dev_attr_ipv4_iface_tos.attr, 676 &dev_attr_ipv4_iface_grat_arp_en.attr, 677 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 678 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 679 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 680 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 681 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 682 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 683 &dev_attr_ipv4_iface_fragment_disable.attr, 684 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 685 &dev_attr_ipv4_iface_ttl.attr, 686 &dev_attr_ipv6_iface_link_local_state.attr, 687 &dev_attr_ipv6_iface_router_state.attr, 688 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 689 &dev_attr_ipv6_iface_mld_en.attr, 690 &dev_attr_ipv6_iface_flow_label.attr, 691 &dev_attr_ipv6_iface_traffic_class.attr, 692 &dev_attr_ipv6_iface_hop_limit.attr, 693 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 694 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 695 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 696 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 697 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 698 NULL, 699 }; 700 701 static struct attribute_group iscsi_iface_group = { 702 .attrs = iscsi_iface_attrs, 703 .is_visible = iscsi_iface_attr_is_visible, 704 }; 705 706 /* convert iscsi_ipaddress_state values to ascii string name */ 707 static const struct { 708 enum iscsi_ipaddress_state value; 709 char *name; 710 } iscsi_ipaddress_state_names[] = { 711 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 712 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 713 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 714 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 715 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 716 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 717 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 718 }; 719 720 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 721 { 722 int i; 723 char *state = NULL; 724 725 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 726 if (iscsi_ipaddress_state_names[i].value == port_state) { 727 state = iscsi_ipaddress_state_names[i].name; 728 break; 729 } 730 } 731 return state; 732 } 733 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 734 735 /* convert iscsi_router_state values to ascii string name */ 736 static const struct { 737 enum iscsi_router_state value; 738 char *name; 739 } iscsi_router_state_names[] = { 740 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 741 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 742 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 743 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 744 }; 745 746 char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 747 { 748 int i; 749 char *state = NULL; 750 751 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 752 if (iscsi_router_state_names[i].value == router_state) { 753 state = iscsi_router_state_names[i].name; 754 break; 755 } 756 } 757 return state; 758 } 759 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 760 761 struct iscsi_iface * 762 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 763 uint32_t iface_type, uint32_t iface_num, int dd_size) 764 { 765 struct iscsi_iface *iface; 766 int err; 767 768 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 769 if (!iface) 770 return NULL; 771 772 iface->transport = transport; 773 iface->iface_type = iface_type; 774 iface->iface_num = iface_num; 775 iface->dev.release = iscsi_iface_release; 776 iface->dev.class = &iscsi_iface_class; 777 /* parent reference released in iscsi_iface_release */ 778 iface->dev.parent = get_device(&shost->shost_gendev); 779 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 780 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 781 iface_num); 782 else 783 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 784 iface_num); 785 786 err = device_register(&iface->dev); 787 if (err) 788 goto free_iface; 789 790 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 791 if (err) 792 goto unreg_iface; 793 794 if (dd_size) 795 iface->dd_data = &iface[1]; 796 return iface; 797 798 unreg_iface: 799 device_unregister(&iface->dev); 800 return NULL; 801 802 free_iface: 803 put_device(iface->dev.parent); 804 kfree(iface); 805 return NULL; 806 } 807 EXPORT_SYMBOL_GPL(iscsi_create_iface); 808 809 void iscsi_destroy_iface(struct iscsi_iface *iface) 810 { 811 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 812 device_unregister(&iface->dev); 813 } 814 EXPORT_SYMBOL_GPL(iscsi_destroy_iface); 815 816 /* 817 * Interface to display flash node params to sysfs 818 */ 819 820 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ 821 struct device_attribute dev_attr_##_prefix##_##_name = \ 822 __ATTR(_name, _mode, _show, _store) 823 824 /* flash node session attrs show */ 825 #define iscsi_flashnode_sess_attr_show(type, name, param) \ 826 static ssize_t \ 827 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 828 char *buf) \ 829 { \ 830 struct iscsi_bus_flash_session *fnode_sess = \ 831 iscsi_dev_to_flash_session(dev);\ 832 struct iscsi_transport *t = fnode_sess->transport; \ 833 return t->get_flashnode_param(fnode_sess, param, buf); \ 834 } \ 835 836 837 #define iscsi_flashnode_sess_attr(type, name, param) \ 838 iscsi_flashnode_sess_attr_show(type, name, param) \ 839 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 840 show_##type##_##name, NULL); 841 842 /* Flash node session attributes */ 843 844 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 845 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 846 iscsi_flashnode_sess_attr(fnode, discovery_session, 847 ISCSI_FLASHNODE_DISCOVERY_SESS); 848 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 849 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 850 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 851 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 852 iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 853 ISCSI_FLASHNODE_DATASEQ_INORDER); 854 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 855 ISCSI_FLASHNODE_PDU_INORDER); 856 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 857 iscsi_flashnode_sess_attr(fnode, discovery_logout, 858 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 859 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 860 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 861 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 862 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 863 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 864 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 865 iscsi_flashnode_sess_attr(fnode, def_time2retain, 866 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 867 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 868 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 869 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 870 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 871 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 872 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 873 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 874 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 875 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 876 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 877 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 878 iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 879 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 880 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 881 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 882 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 883 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 884 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 885 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 886 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 887 888 static struct attribute *iscsi_flashnode_sess_attrs[] = { 889 &dev_attr_fnode_auto_snd_tgt_disable.attr, 890 &dev_attr_fnode_discovery_session.attr, 891 &dev_attr_fnode_portal_type.attr, 892 &dev_attr_fnode_entry_enable.attr, 893 &dev_attr_fnode_immediate_data.attr, 894 &dev_attr_fnode_initial_r2t.attr, 895 &dev_attr_fnode_data_seq_in_order.attr, 896 &dev_attr_fnode_data_pdu_in_order.attr, 897 &dev_attr_fnode_chap_auth.attr, 898 &dev_attr_fnode_discovery_logout.attr, 899 &dev_attr_fnode_bidi_chap.attr, 900 &dev_attr_fnode_discovery_auth_optional.attr, 901 &dev_attr_fnode_erl.attr, 902 &dev_attr_fnode_first_burst_len.attr, 903 &dev_attr_fnode_def_time2wait.attr, 904 &dev_attr_fnode_def_time2retain.attr, 905 &dev_attr_fnode_max_outstanding_r2t.attr, 906 &dev_attr_fnode_isid.attr, 907 &dev_attr_fnode_tsid.attr, 908 &dev_attr_fnode_max_burst_len.attr, 909 &dev_attr_fnode_def_taskmgmt_tmo.attr, 910 &dev_attr_fnode_targetalias.attr, 911 &dev_attr_fnode_targetname.attr, 912 &dev_attr_fnode_tpgt.attr, 913 &dev_attr_fnode_discovery_parent_idx.attr, 914 &dev_attr_fnode_discovery_parent_type.attr, 915 &dev_attr_fnode_chap_in_idx.attr, 916 &dev_attr_fnode_chap_out_idx.attr, 917 &dev_attr_fnode_username.attr, 918 &dev_attr_fnode_username_in.attr, 919 &dev_attr_fnode_password.attr, 920 &dev_attr_fnode_password_in.attr, 921 &dev_attr_fnode_is_boot_target.attr, 922 NULL, 923 }; 924 925 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, 926 struct attribute *attr, 927 int i) 928 { 929 struct device *dev = container_of(kobj, struct device, kobj); 930 struct iscsi_bus_flash_session *fnode_sess = 931 iscsi_dev_to_flash_session(dev); 932 struct iscsi_transport *t = fnode_sess->transport; 933 int param; 934 935 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { 936 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; 937 } else if (attr == &dev_attr_fnode_discovery_session.attr) { 938 param = ISCSI_FLASHNODE_DISCOVERY_SESS; 939 } else if (attr == &dev_attr_fnode_portal_type.attr) { 940 param = ISCSI_FLASHNODE_PORTAL_TYPE; 941 } else if (attr == &dev_attr_fnode_entry_enable.attr) { 942 param = ISCSI_FLASHNODE_ENTRY_EN; 943 } else if (attr == &dev_attr_fnode_immediate_data.attr) { 944 param = ISCSI_FLASHNODE_IMM_DATA_EN; 945 } else if (attr == &dev_attr_fnode_initial_r2t.attr) { 946 param = ISCSI_FLASHNODE_INITIAL_R2T_EN; 947 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { 948 param = ISCSI_FLASHNODE_DATASEQ_INORDER; 949 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { 950 param = ISCSI_FLASHNODE_PDU_INORDER; 951 } else if (attr == &dev_attr_fnode_chap_auth.attr) { 952 param = ISCSI_FLASHNODE_CHAP_AUTH_EN; 953 } else if (attr == &dev_attr_fnode_discovery_logout.attr) { 954 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; 955 } else if (attr == &dev_attr_fnode_bidi_chap.attr) { 956 param = ISCSI_FLASHNODE_BIDI_CHAP_EN; 957 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { 958 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; 959 } else if (attr == &dev_attr_fnode_erl.attr) { 960 param = ISCSI_FLASHNODE_ERL; 961 } else if (attr == &dev_attr_fnode_first_burst_len.attr) { 962 param = ISCSI_FLASHNODE_FIRST_BURST; 963 } else if (attr == &dev_attr_fnode_def_time2wait.attr) { 964 param = ISCSI_FLASHNODE_DEF_TIME2WAIT; 965 } else if (attr == &dev_attr_fnode_def_time2retain.attr) { 966 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; 967 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { 968 param = ISCSI_FLASHNODE_MAX_R2T; 969 } else if (attr == &dev_attr_fnode_isid.attr) { 970 param = ISCSI_FLASHNODE_ISID; 971 } else if (attr == &dev_attr_fnode_tsid.attr) { 972 param = ISCSI_FLASHNODE_TSID; 973 } else if (attr == &dev_attr_fnode_max_burst_len.attr) { 974 param = ISCSI_FLASHNODE_MAX_BURST; 975 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { 976 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; 977 } else if (attr == &dev_attr_fnode_targetalias.attr) { 978 param = ISCSI_FLASHNODE_ALIAS; 979 } else if (attr == &dev_attr_fnode_targetname.attr) { 980 param = ISCSI_FLASHNODE_NAME; 981 } else if (attr == &dev_attr_fnode_tpgt.attr) { 982 param = ISCSI_FLASHNODE_TPGT; 983 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { 984 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; 985 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { 986 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; 987 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { 988 param = ISCSI_FLASHNODE_CHAP_IN_IDX; 989 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { 990 param = ISCSI_FLASHNODE_CHAP_OUT_IDX; 991 } else if (attr == &dev_attr_fnode_username.attr) { 992 param = ISCSI_FLASHNODE_USERNAME; 993 } else if (attr == &dev_attr_fnode_username_in.attr) { 994 param = ISCSI_FLASHNODE_USERNAME_IN; 995 } else if (attr == &dev_attr_fnode_password.attr) { 996 param = ISCSI_FLASHNODE_PASSWORD; 997 } else if (attr == &dev_attr_fnode_password_in.attr) { 998 param = ISCSI_FLASHNODE_PASSWORD_IN; 999 } else if (attr == &dev_attr_fnode_is_boot_target.attr) { 1000 param = ISCSI_FLASHNODE_IS_BOOT_TGT; 1001 } else { 1002 WARN_ONCE(1, "Invalid flashnode session attr"); 1003 return 0; 1004 } 1005 1006 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1007 } 1008 1009 static struct attribute_group iscsi_flashnode_sess_attr_group = { 1010 .attrs = iscsi_flashnode_sess_attrs, 1011 .is_visible = iscsi_flashnode_sess_attr_is_visible, 1012 }; 1013 1014 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 1015 &iscsi_flashnode_sess_attr_group, 1016 NULL, 1017 }; 1018 1019 static void iscsi_flashnode_sess_release(struct device *dev) 1020 { 1021 struct iscsi_bus_flash_session *fnode_sess = 1022 iscsi_dev_to_flash_session(dev); 1023 1024 kfree(fnode_sess->targetname); 1025 kfree(fnode_sess->targetalias); 1026 kfree(fnode_sess->portal_type); 1027 kfree(fnode_sess); 1028 } 1029 1030 static const struct device_type iscsi_flashnode_sess_dev_type = { 1031 .name = "iscsi_flashnode_sess_dev_type", 1032 .groups = iscsi_flashnode_sess_attr_groups, 1033 .release = iscsi_flashnode_sess_release, 1034 }; 1035 1036 /* flash node connection attrs show */ 1037 #define iscsi_flashnode_conn_attr_show(type, name, param) \ 1038 static ssize_t \ 1039 show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 1040 char *buf) \ 1041 { \ 1042 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ 1043 struct iscsi_bus_flash_session *fnode_sess = \ 1044 iscsi_flash_conn_to_flash_session(fnode_conn);\ 1045 struct iscsi_transport *t = fnode_conn->transport; \ 1046 return t->get_flashnode_param(fnode_sess, param, buf); \ 1047 } \ 1048 1049 1050 #define iscsi_flashnode_conn_attr(type, name, param) \ 1051 iscsi_flashnode_conn_attr_show(type, name, param) \ 1052 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1053 show_##type##_##name, NULL); 1054 1055 /* Flash node connection attributes */ 1056 1057 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1058 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1059 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1060 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1061 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1062 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1063 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1064 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1065 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1066 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1067 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1068 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1069 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1070 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1071 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1072 iscsi_flashnode_conn_attr(fnode, fragment_disable, 1073 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1074 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1075 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1076 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1077 iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1078 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1079 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1080 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1081 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1082 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1083 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1084 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1085 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1086 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1087 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1088 iscsi_flashnode_conn_attr(fnode, max_segment_size, 1089 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1090 iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1091 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1092 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1093 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1094 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1095 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1096 1097 static struct attribute *iscsi_flashnode_conn_attrs[] = { 1098 &dev_attr_fnode_is_fw_assigned_ipv6.attr, 1099 &dev_attr_fnode_header_digest.attr, 1100 &dev_attr_fnode_data_digest.attr, 1101 &dev_attr_fnode_snack_req.attr, 1102 &dev_attr_fnode_tcp_timestamp_stat.attr, 1103 &dev_attr_fnode_tcp_nagle_disable.attr, 1104 &dev_attr_fnode_tcp_wsf_disable.attr, 1105 &dev_attr_fnode_tcp_timer_scale.attr, 1106 &dev_attr_fnode_tcp_timestamp_enable.attr, 1107 &dev_attr_fnode_fragment_disable.attr, 1108 &dev_attr_fnode_max_recv_dlength.attr, 1109 &dev_attr_fnode_max_xmit_dlength.attr, 1110 &dev_attr_fnode_keepalive_tmo.attr, 1111 &dev_attr_fnode_port.attr, 1112 &dev_attr_fnode_ipaddress.attr, 1113 &dev_attr_fnode_redirect_ipaddr.attr, 1114 &dev_attr_fnode_max_segment_size.attr, 1115 &dev_attr_fnode_local_port.attr, 1116 &dev_attr_fnode_ipv4_tos.attr, 1117 &dev_attr_fnode_ipv6_traffic_class.attr, 1118 &dev_attr_fnode_ipv6_flow_label.attr, 1119 &dev_attr_fnode_link_local_ipv6.attr, 1120 &dev_attr_fnode_tcp_xmit_wsf.attr, 1121 &dev_attr_fnode_tcp_recv_wsf.attr, 1122 &dev_attr_fnode_statsn.attr, 1123 &dev_attr_fnode_exp_statsn.attr, 1124 NULL, 1125 }; 1126 1127 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, 1128 struct attribute *attr, 1129 int i) 1130 { 1131 struct device *dev = container_of(kobj, struct device, kobj); 1132 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1133 struct iscsi_transport *t = fnode_conn->transport; 1134 int param; 1135 1136 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { 1137 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; 1138 } else if (attr == &dev_attr_fnode_header_digest.attr) { 1139 param = ISCSI_FLASHNODE_HDR_DGST_EN; 1140 } else if (attr == &dev_attr_fnode_data_digest.attr) { 1141 param = ISCSI_FLASHNODE_DATA_DGST_EN; 1142 } else if (attr == &dev_attr_fnode_snack_req.attr) { 1143 param = ISCSI_FLASHNODE_SNACK_REQ_EN; 1144 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { 1145 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; 1146 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { 1147 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; 1148 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { 1149 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; 1150 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { 1151 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; 1152 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { 1153 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; 1154 } else if (attr == &dev_attr_fnode_fragment_disable.attr) { 1155 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; 1156 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { 1157 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; 1158 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { 1159 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; 1160 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { 1161 param = ISCSI_FLASHNODE_KEEPALIVE_TMO; 1162 } else if (attr == &dev_attr_fnode_port.attr) { 1163 param = ISCSI_FLASHNODE_PORT; 1164 } else if (attr == &dev_attr_fnode_ipaddress.attr) { 1165 param = ISCSI_FLASHNODE_IPADDR; 1166 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { 1167 param = ISCSI_FLASHNODE_REDIRECT_IPADDR; 1168 } else if (attr == &dev_attr_fnode_max_segment_size.attr) { 1169 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; 1170 } else if (attr == &dev_attr_fnode_local_port.attr) { 1171 param = ISCSI_FLASHNODE_LOCAL_PORT; 1172 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { 1173 param = ISCSI_FLASHNODE_IPV4_TOS; 1174 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { 1175 param = ISCSI_FLASHNODE_IPV6_TC; 1176 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { 1177 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; 1178 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { 1179 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; 1180 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { 1181 param = ISCSI_FLASHNODE_TCP_XMIT_WSF; 1182 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { 1183 param = ISCSI_FLASHNODE_TCP_RECV_WSF; 1184 } else if (attr == &dev_attr_fnode_statsn.attr) { 1185 param = ISCSI_FLASHNODE_STATSN; 1186 } else if (attr == &dev_attr_fnode_exp_statsn.attr) { 1187 param = ISCSI_FLASHNODE_EXP_STATSN; 1188 } else { 1189 WARN_ONCE(1, "Invalid flashnode connection attr"); 1190 return 0; 1191 } 1192 1193 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); 1194 } 1195 1196 static struct attribute_group iscsi_flashnode_conn_attr_group = { 1197 .attrs = iscsi_flashnode_conn_attrs, 1198 .is_visible = iscsi_flashnode_conn_attr_is_visible, 1199 }; 1200 1201 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1202 &iscsi_flashnode_conn_attr_group, 1203 NULL, 1204 }; 1205 1206 static void iscsi_flashnode_conn_release(struct device *dev) 1207 { 1208 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); 1209 1210 kfree(fnode_conn->ipaddress); 1211 kfree(fnode_conn->redirect_ipaddr); 1212 kfree(fnode_conn->link_local_ipv6_addr); 1213 kfree(fnode_conn); 1214 } 1215 1216 static const struct device_type iscsi_flashnode_conn_dev_type = { 1217 .name = "iscsi_flashnode_conn_dev_type", 1218 .groups = iscsi_flashnode_conn_attr_groups, 1219 .release = iscsi_flashnode_conn_release, 1220 }; 1221 1222 static struct bus_type iscsi_flashnode_bus; 1223 1224 int iscsi_flashnode_bus_match(struct device *dev, 1225 struct device_driver *drv) 1226 { 1227 if (dev->bus == &iscsi_flashnode_bus) 1228 return 1; 1229 return 0; 1230 } 1231 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1232 1233 static struct bus_type iscsi_flashnode_bus = { 1234 .name = "iscsi_flashnode", 1235 .match = &iscsi_flashnode_bus_match, 1236 }; 1237 1238 /** 1239 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs 1240 * @shost: pointer to host data 1241 * @index: index of flashnode to add in sysfs 1242 * @transport: pointer to transport data 1243 * @dd_size: total size to allocate 1244 * 1245 * Adds a sysfs entry for the flashnode session attributes 1246 * 1247 * Returns: 1248 * pointer to allocated flashnode sess on success 1249 * %NULL on failure 1250 */ 1251 struct iscsi_bus_flash_session * 1252 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, 1253 struct iscsi_transport *transport, 1254 int dd_size) 1255 { 1256 struct iscsi_bus_flash_session *fnode_sess; 1257 int err; 1258 1259 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); 1260 if (!fnode_sess) 1261 return NULL; 1262 1263 fnode_sess->transport = transport; 1264 fnode_sess->target_id = index; 1265 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; 1266 fnode_sess->dev.bus = &iscsi_flashnode_bus; 1267 fnode_sess->dev.parent = &shost->shost_gendev; 1268 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", 1269 shost->host_no, index); 1270 1271 err = device_register(&fnode_sess->dev); 1272 if (err) 1273 goto free_fnode_sess; 1274 1275 if (dd_size) 1276 fnode_sess->dd_data = &fnode_sess[1]; 1277 1278 return fnode_sess; 1279 1280 free_fnode_sess: 1281 kfree(fnode_sess); 1282 return NULL; 1283 } 1284 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); 1285 1286 /** 1287 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs 1288 * @shost: pointer to host data 1289 * @fnode_sess: pointer to the parent flashnode session entry 1290 * @transport: pointer to transport data 1291 * @dd_size: total size to allocate 1292 * 1293 * Adds a sysfs entry for the flashnode connection attributes 1294 * 1295 * Returns: 1296 * pointer to allocated flashnode conn on success 1297 * %NULL on failure 1298 */ 1299 struct iscsi_bus_flash_conn * 1300 iscsi_create_flashnode_conn(struct Scsi_Host *shost, 1301 struct iscsi_bus_flash_session *fnode_sess, 1302 struct iscsi_transport *transport, 1303 int dd_size) 1304 { 1305 struct iscsi_bus_flash_conn *fnode_conn; 1306 int err; 1307 1308 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); 1309 if (!fnode_conn) 1310 return NULL; 1311 1312 fnode_conn->transport = transport; 1313 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; 1314 fnode_conn->dev.bus = &iscsi_flashnode_bus; 1315 fnode_conn->dev.parent = &fnode_sess->dev; 1316 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", 1317 shost->host_no, fnode_sess->target_id); 1318 1319 err = device_register(&fnode_conn->dev); 1320 if (err) 1321 goto free_fnode_conn; 1322 1323 if (dd_size) 1324 fnode_conn->dd_data = &fnode_conn[1]; 1325 1326 return fnode_conn; 1327 1328 free_fnode_conn: 1329 kfree(fnode_conn); 1330 return NULL; 1331 } 1332 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); 1333 1334 /** 1335 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn 1336 * @dev: device to verify 1337 * @data: pointer to data containing value to use for verification 1338 * 1339 * Verifies if the passed device is flashnode conn device 1340 * 1341 * Returns: 1342 * 1 on success 1343 * 0 on failure 1344 */ 1345 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1346 { 1347 return dev->bus == &iscsi_flashnode_bus; 1348 } 1349 1350 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1351 { 1352 device_unregister(&fnode_conn->dev); 1353 return 0; 1354 } 1355 1356 static int flashnode_match_index(struct device *dev, void *data) 1357 { 1358 struct iscsi_bus_flash_session *fnode_sess = NULL; 1359 int ret = 0; 1360 1361 if (!iscsi_flashnode_bus_match(dev, NULL)) 1362 goto exit_match_index; 1363 1364 fnode_sess = iscsi_dev_to_flash_session(dev); 1365 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1366 1367 exit_match_index: 1368 return ret; 1369 } 1370 1371 /** 1372 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1373 * @shost: pointer to host data 1374 * @idx: index to match 1375 * 1376 * Finds the flashnode session object for the passed index 1377 * 1378 * Returns: 1379 * pointer to found flashnode session object on success 1380 * %NULL on failure 1381 */ 1382 static struct iscsi_bus_flash_session * 1383 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1384 { 1385 struct iscsi_bus_flash_session *fnode_sess = NULL; 1386 struct device *dev; 1387 1388 dev = device_find_child(&shost->shost_gendev, &idx, 1389 flashnode_match_index); 1390 if (dev) 1391 fnode_sess = iscsi_dev_to_flash_session(dev); 1392 1393 return fnode_sess; 1394 } 1395 1396 /** 1397 * iscsi_find_flashnode_sess - finds flashnode session entry 1398 * @shost: pointer to host data 1399 * @data: pointer to data containing value to use for comparison 1400 * @fn: function pointer that does actual comparison 1401 * 1402 * Finds the flashnode session object comparing the data passed using logic 1403 * defined in passed function pointer 1404 * 1405 * Returns: 1406 * pointer to found flashnode session device object on success 1407 * %NULL on failure 1408 */ 1409 struct device * 1410 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1411 int (*fn)(struct device *dev, void *data)) 1412 { 1413 return device_find_child(&shost->shost_gendev, data, fn); 1414 } 1415 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1416 1417 /** 1418 * iscsi_find_flashnode_conn - finds flashnode connection entry 1419 * @fnode_sess: pointer to parent flashnode session entry 1420 * 1421 * Finds the flashnode connection object comparing the data passed using logic 1422 * defined in passed function pointer 1423 * 1424 * Returns: 1425 * pointer to found flashnode connection device object on success 1426 * %NULL on failure 1427 */ 1428 struct device * 1429 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1430 { 1431 return device_find_child(&fnode_sess->dev, NULL, 1432 iscsi_is_flashnode_conn_dev); 1433 } 1434 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1435 1436 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1437 { 1438 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1439 return 0; 1440 1441 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1442 } 1443 1444 /** 1445 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1446 * @fnode_sess: pointer to flashnode session entry to be destroyed 1447 * 1448 * Deletes the flashnode session entry and all children flashnode connection 1449 * entries from sysfs 1450 */ 1451 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1452 { 1453 int err; 1454 1455 err = device_for_each_child(&fnode_sess->dev, NULL, 1456 iscsi_iter_destroy_flashnode_conn_fn); 1457 if (err) 1458 pr_err("Could not delete all connections for %s. Error %d.\n", 1459 fnode_sess->dev.kobj.name, err); 1460 1461 device_unregister(&fnode_sess->dev); 1462 } 1463 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1464 1465 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1466 { 1467 if (!iscsi_flashnode_bus_match(dev, NULL)) 1468 return 0; 1469 1470 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1471 return 0; 1472 } 1473 1474 /** 1475 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1476 * @shost: pointer to host data 1477 * 1478 * Destroys all the flashnode session entries and all corresponding children 1479 * flashnode connection entries from sysfs 1480 */ 1481 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1482 { 1483 device_for_each_child(&shost->shost_gendev, NULL, 1484 iscsi_iter_destroy_flashnode_fn); 1485 } 1486 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1487 1488 /* 1489 * BSG support 1490 */ 1491 /** 1492 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1493 * @job: bsg job to be processed 1494 */ 1495 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1496 { 1497 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1498 struct iscsi_bsg_request *req = job->request; 1499 struct iscsi_bsg_reply *reply = job->reply; 1500 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1501 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1502 int ret; 1503 1504 /* check if we have the msgcode value at least */ 1505 if (job->request_len < sizeof(uint32_t)) { 1506 ret = -ENOMSG; 1507 goto fail_host_msg; 1508 } 1509 1510 /* Validate the host command */ 1511 switch (req->msgcode) { 1512 case ISCSI_BSG_HST_VENDOR: 1513 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1514 if ((shost->hostt->vendor_id == 0L) || 1515 (req->rqst_data.h_vendor.vendor_id != 1516 shost->hostt->vendor_id)) { 1517 ret = -ESRCH; 1518 goto fail_host_msg; 1519 } 1520 break; 1521 default: 1522 ret = -EBADR; 1523 goto fail_host_msg; 1524 } 1525 1526 /* check if we really have all the request data needed */ 1527 if (job->request_len < cmdlen) { 1528 ret = -ENOMSG; 1529 goto fail_host_msg; 1530 } 1531 1532 ret = i->iscsi_transport->bsg_request(job); 1533 if (!ret) 1534 return 0; 1535 1536 fail_host_msg: 1537 /* return the errno failure code as the only status */ 1538 BUG_ON(job->reply_len < sizeof(uint32_t)); 1539 reply->reply_payload_rcv_len = 0; 1540 reply->result = ret; 1541 job->reply_len = sizeof(uint32_t); 1542 bsg_job_done(job, ret, 0); 1543 return 0; 1544 } 1545 1546 /** 1547 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1548 * @shost: shost for iscsi_host 1549 * @ihost: iscsi_cls_host adding the structures to 1550 */ 1551 static int 1552 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1553 { 1554 struct device *dev = &shost->shost_gendev; 1555 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1556 struct request_queue *q; 1557 char bsg_name[20]; 1558 1559 if (!i->iscsi_transport->bsg_request) 1560 return -ENOTSUPP; 1561 1562 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1563 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1564 if (IS_ERR(q)) { 1565 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1566 "initialize - no request queue\n"); 1567 return PTR_ERR(q); 1568 } 1569 __scsi_init_queue(shost, q); 1570 1571 ihost->bsg_q = q; 1572 return 0; 1573 } 1574 1575 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1576 struct device *cdev) 1577 { 1578 struct Scsi_Host *shost = dev_to_shost(dev); 1579 struct iscsi_cls_host *ihost = shost->shost_data; 1580 1581 memset(ihost, 0, sizeof(*ihost)); 1582 atomic_set(&ihost->nr_scans, 0); 1583 mutex_init(&ihost->mutex); 1584 1585 iscsi_bsg_host_add(shost, ihost); 1586 /* ignore any bsg add error - we just can't do sgio */ 1587 1588 return 0; 1589 } 1590 1591 static int iscsi_remove_host(struct transport_container *tc, 1592 struct device *dev, struct device *cdev) 1593 { 1594 struct Scsi_Host *shost = dev_to_shost(dev); 1595 struct iscsi_cls_host *ihost = shost->shost_data; 1596 1597 bsg_remove_queue(ihost->bsg_q); 1598 return 0; 1599 } 1600 1601 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1602 "iscsi_host", 1603 iscsi_setup_host, 1604 iscsi_remove_host, 1605 NULL); 1606 1607 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1608 "iscsi_session", 1609 NULL, 1610 NULL, 1611 NULL); 1612 1613 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1614 "iscsi_connection", 1615 NULL, 1616 NULL, 1617 NULL); 1618 1619 static struct sock *nls; 1620 static DEFINE_MUTEX(rx_queue_mutex); 1621 1622 static LIST_HEAD(sesslist); 1623 static DEFINE_SPINLOCK(sesslock); 1624 static LIST_HEAD(connlist); 1625 static DEFINE_SPINLOCK(connlock); 1626 1627 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1628 { 1629 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1630 return sess->sid; 1631 } 1632 1633 /* 1634 * Returns the matching session to a given sid 1635 */ 1636 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1637 { 1638 unsigned long flags; 1639 struct iscsi_cls_session *sess; 1640 1641 spin_lock_irqsave(&sesslock, flags); 1642 list_for_each_entry(sess, &sesslist, sess_list) { 1643 if (sess->sid == sid) { 1644 spin_unlock_irqrestore(&sesslock, flags); 1645 return sess; 1646 } 1647 } 1648 spin_unlock_irqrestore(&sesslock, flags); 1649 return NULL; 1650 } 1651 1652 /* 1653 * Returns the matching connection to a given sid / cid tuple 1654 */ 1655 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1656 { 1657 unsigned long flags; 1658 struct iscsi_cls_conn *conn; 1659 1660 spin_lock_irqsave(&connlock, flags); 1661 list_for_each_entry(conn, &connlist, conn_list) { 1662 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1663 spin_unlock_irqrestore(&connlock, flags); 1664 return conn; 1665 } 1666 } 1667 spin_unlock_irqrestore(&connlock, flags); 1668 return NULL; 1669 } 1670 1671 /* 1672 * The following functions can be used by LLDs that allocate 1673 * their own scsi_hosts or by software iscsi LLDs 1674 */ 1675 static struct { 1676 int value; 1677 char *name; 1678 } iscsi_session_state_names[] = { 1679 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1680 { ISCSI_SESSION_FAILED, "FAILED" }, 1681 { ISCSI_SESSION_FREE, "FREE" }, 1682 }; 1683 1684 static const char *iscsi_session_state_name(int state) 1685 { 1686 int i; 1687 char *name = NULL; 1688 1689 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1690 if (iscsi_session_state_names[i].value == state) { 1691 name = iscsi_session_state_names[i].name; 1692 break; 1693 } 1694 } 1695 return name; 1696 } 1697 1698 int iscsi_session_chkready(struct iscsi_cls_session *session) 1699 { 1700 unsigned long flags; 1701 int err; 1702 1703 spin_lock_irqsave(&session->lock, flags); 1704 switch (session->state) { 1705 case ISCSI_SESSION_LOGGED_IN: 1706 err = 0; 1707 break; 1708 case ISCSI_SESSION_FAILED: 1709 err = DID_IMM_RETRY << 16; 1710 break; 1711 case ISCSI_SESSION_FREE: 1712 err = DID_TRANSPORT_FAILFAST << 16; 1713 break; 1714 default: 1715 err = DID_NO_CONNECT << 16; 1716 break; 1717 } 1718 spin_unlock_irqrestore(&session->lock, flags); 1719 return err; 1720 } 1721 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1722 1723 int iscsi_is_session_online(struct iscsi_cls_session *session) 1724 { 1725 unsigned long flags; 1726 int ret = 0; 1727 1728 spin_lock_irqsave(&session->lock, flags); 1729 if (session->state == ISCSI_SESSION_LOGGED_IN) 1730 ret = 1; 1731 spin_unlock_irqrestore(&session->lock, flags); 1732 return ret; 1733 } 1734 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1735 1736 static void iscsi_session_release(struct device *dev) 1737 { 1738 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1739 struct Scsi_Host *shost; 1740 1741 shost = iscsi_session_to_shost(session); 1742 scsi_host_put(shost); 1743 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1744 kfree(session); 1745 } 1746 1747 int iscsi_is_session_dev(const struct device *dev) 1748 { 1749 return dev->release == iscsi_session_release; 1750 } 1751 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1752 1753 static int iscsi_iter_session_fn(struct device *dev, void *data) 1754 { 1755 void (* fn) (struct iscsi_cls_session *) = data; 1756 1757 if (!iscsi_is_session_dev(dev)) 1758 return 0; 1759 fn(iscsi_dev_to_session(dev)); 1760 return 0; 1761 } 1762 1763 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1764 void (*fn)(struct iscsi_cls_session *)) 1765 { 1766 device_for_each_child(&shost->shost_gendev, fn, 1767 iscsi_iter_session_fn); 1768 } 1769 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1770 1771 /** 1772 * iscsi_scan_finished - helper to report when running scans are done 1773 * @shost: scsi host 1774 * @time: scan run time 1775 * 1776 * This function can be used by drives like qla4xxx to report to the scsi 1777 * layer when the scans it kicked off at module load time are done. 1778 */ 1779 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) 1780 { 1781 struct iscsi_cls_host *ihost = shost->shost_data; 1782 /* 1783 * qla4xxx will have kicked off some session unblocks before calling 1784 * scsi_scan_host, so just wait for them to complete. 1785 */ 1786 return !atomic_read(&ihost->nr_scans); 1787 } 1788 EXPORT_SYMBOL_GPL(iscsi_scan_finished); 1789 1790 struct iscsi_scan_data { 1791 unsigned int channel; 1792 unsigned int id; 1793 u64 lun; 1794 enum scsi_scan_mode rescan; 1795 }; 1796 1797 static int iscsi_user_scan_session(struct device *dev, void *data) 1798 { 1799 struct iscsi_scan_data *scan_data = data; 1800 struct iscsi_cls_session *session; 1801 struct Scsi_Host *shost; 1802 struct iscsi_cls_host *ihost; 1803 unsigned long flags; 1804 unsigned int id; 1805 1806 if (!iscsi_is_session_dev(dev)) 1807 return 0; 1808 1809 session = iscsi_dev_to_session(dev); 1810 1811 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1812 1813 shost = iscsi_session_to_shost(session); 1814 ihost = shost->shost_data; 1815 1816 mutex_lock(&ihost->mutex); 1817 spin_lock_irqsave(&session->lock, flags); 1818 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1819 spin_unlock_irqrestore(&session->lock, flags); 1820 goto user_scan_exit; 1821 } 1822 id = session->target_id; 1823 spin_unlock_irqrestore(&session->lock, flags); 1824 1825 if (id != ISCSI_MAX_TARGET) { 1826 if ((scan_data->channel == SCAN_WILD_CARD || 1827 scan_data->channel == 0) && 1828 (scan_data->id == SCAN_WILD_CARD || 1829 scan_data->id == id)) 1830 scsi_scan_target(&session->dev, 0, id, 1831 scan_data->lun, scan_data->rescan); 1832 } 1833 1834 user_scan_exit: 1835 mutex_unlock(&ihost->mutex); 1836 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1837 return 0; 1838 } 1839 1840 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1841 uint id, u64 lun) 1842 { 1843 struct iscsi_scan_data scan_data; 1844 1845 scan_data.channel = channel; 1846 scan_data.id = id; 1847 scan_data.lun = lun; 1848 scan_data.rescan = SCSI_SCAN_MANUAL; 1849 1850 return device_for_each_child(&shost->shost_gendev, &scan_data, 1851 iscsi_user_scan_session); 1852 } 1853 1854 static void iscsi_scan_session(struct work_struct *work) 1855 { 1856 struct iscsi_cls_session *session = 1857 container_of(work, struct iscsi_cls_session, scan_work); 1858 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1859 struct iscsi_cls_host *ihost = shost->shost_data; 1860 struct iscsi_scan_data scan_data; 1861 1862 scan_data.channel = 0; 1863 scan_data.id = SCAN_WILD_CARD; 1864 scan_data.lun = SCAN_WILD_CARD; 1865 scan_data.rescan = SCSI_SCAN_RESCAN; 1866 1867 iscsi_user_scan_session(&session->dev, &scan_data); 1868 atomic_dec(&ihost->nr_scans); 1869 } 1870 1871 /** 1872 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1873 * @cmd: scsi cmd passed to scsi eh handler 1874 * 1875 * If the session is down this function will wait for the recovery 1876 * timer to fire or for the session to be logged back in. If the 1877 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1878 * should pass this error value to the scsi eh. 1879 */ 1880 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1881 { 1882 struct iscsi_cls_session *session = 1883 starget_to_session(scsi_target(cmd->device)); 1884 unsigned long flags; 1885 int ret = 0; 1886 1887 spin_lock_irqsave(&session->lock, flags); 1888 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1889 if (session->state == ISCSI_SESSION_FREE) { 1890 ret = FAST_IO_FAIL; 1891 break; 1892 } 1893 spin_unlock_irqrestore(&session->lock, flags); 1894 msleep(1000); 1895 spin_lock_irqsave(&session->lock, flags); 1896 } 1897 spin_unlock_irqrestore(&session->lock, flags); 1898 return ret; 1899 } 1900 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1901 1902 static void session_recovery_timedout(struct work_struct *work) 1903 { 1904 struct iscsi_cls_session *session = 1905 container_of(work, struct iscsi_cls_session, 1906 recovery_work.work); 1907 unsigned long flags; 1908 1909 iscsi_cls_session_printk(KERN_INFO, session, 1910 "session recovery timed out after %d secs\n", 1911 session->recovery_tmo); 1912 1913 spin_lock_irqsave(&session->lock, flags); 1914 switch (session->state) { 1915 case ISCSI_SESSION_FAILED: 1916 session->state = ISCSI_SESSION_FREE; 1917 break; 1918 case ISCSI_SESSION_LOGGED_IN: 1919 case ISCSI_SESSION_FREE: 1920 /* we raced with the unblock's flush */ 1921 spin_unlock_irqrestore(&session->lock, flags); 1922 return; 1923 } 1924 spin_unlock_irqrestore(&session->lock, flags); 1925 1926 if (session->transport->session_recovery_timedout) 1927 session->transport->session_recovery_timedout(session); 1928 1929 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1930 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1931 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1932 } 1933 1934 static void __iscsi_unblock_session(struct work_struct *work) 1935 { 1936 struct iscsi_cls_session *session = 1937 container_of(work, struct iscsi_cls_session, 1938 unblock_work); 1939 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1940 struct iscsi_cls_host *ihost = shost->shost_data; 1941 unsigned long flags; 1942 1943 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1944 /* 1945 * The recovery and unblock work get run from the same workqueue, 1946 * so try to cancel it if it was going to run after this unblock. 1947 */ 1948 cancel_delayed_work(&session->recovery_work); 1949 spin_lock_irqsave(&session->lock, flags); 1950 session->state = ISCSI_SESSION_LOGGED_IN; 1951 spin_unlock_irqrestore(&session->lock, flags); 1952 /* start IO */ 1953 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1954 /* 1955 * Only do kernel scanning if the driver is properly hooked into 1956 * the async scanning code (drivers like iscsi_tcp do login and 1957 * scanning from userspace). 1958 */ 1959 if (shost->hostt->scan_finished) { 1960 if (scsi_queue_work(shost, &session->scan_work)) 1961 atomic_inc(&ihost->nr_scans); 1962 } 1963 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1964 } 1965 1966 /** 1967 * iscsi_unblock_session - set a session as logged in and start IO. 1968 * @session: iscsi session 1969 * 1970 * Mark a session as ready to accept IO. 1971 */ 1972 void iscsi_unblock_session(struct iscsi_cls_session *session) 1973 { 1974 queue_work(iscsi_eh_timer_workq, &session->unblock_work); 1975 /* 1976 * make sure all the events have completed before tell the driver 1977 * it is safe 1978 */ 1979 flush_workqueue(iscsi_eh_timer_workq); 1980 } 1981 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1982 1983 static void __iscsi_block_session(struct work_struct *work) 1984 { 1985 struct iscsi_cls_session *session = 1986 container_of(work, struct iscsi_cls_session, 1987 block_work); 1988 unsigned long flags; 1989 1990 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1991 spin_lock_irqsave(&session->lock, flags); 1992 session->state = ISCSI_SESSION_FAILED; 1993 spin_unlock_irqrestore(&session->lock, flags); 1994 scsi_target_block(&session->dev); 1995 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1996 if (session->recovery_tmo >= 0) 1997 queue_delayed_work(iscsi_eh_timer_workq, 1998 &session->recovery_work, 1999 session->recovery_tmo * HZ); 2000 } 2001 2002 void iscsi_block_session(struct iscsi_cls_session *session) 2003 { 2004 queue_work(iscsi_eh_timer_workq, &session->block_work); 2005 } 2006 EXPORT_SYMBOL_GPL(iscsi_block_session); 2007 2008 static void __iscsi_unbind_session(struct work_struct *work) 2009 { 2010 struct iscsi_cls_session *session = 2011 container_of(work, struct iscsi_cls_session, 2012 unbind_work); 2013 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2014 struct iscsi_cls_host *ihost = shost->shost_data; 2015 unsigned long flags; 2016 unsigned int target_id; 2017 2018 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 2019 2020 /* Prevent new scans and make sure scanning is not in progress */ 2021 mutex_lock(&ihost->mutex); 2022 spin_lock_irqsave(&session->lock, flags); 2023 if (session->target_id == ISCSI_MAX_TARGET) { 2024 spin_unlock_irqrestore(&session->lock, flags); 2025 mutex_unlock(&ihost->mutex); 2026 return; 2027 } 2028 2029 target_id = session->target_id; 2030 session->target_id = ISCSI_MAX_TARGET; 2031 spin_unlock_irqrestore(&session->lock, flags); 2032 mutex_unlock(&ihost->mutex); 2033 2034 if (session->ida_used) 2035 ida_simple_remove(&iscsi_sess_ida, target_id); 2036 2037 scsi_remove_target(&session->dev); 2038 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2039 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2040 } 2041 2042 struct iscsi_cls_session * 2043 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2044 int dd_size) 2045 { 2046 struct iscsi_cls_session *session; 2047 2048 session = kzalloc(sizeof(*session) + dd_size, 2049 GFP_KERNEL); 2050 if (!session) 2051 return NULL; 2052 2053 session->transport = transport; 2054 session->creator = -1; 2055 session->recovery_tmo = 120; 2056 session->recovery_tmo_sysfs_override = false; 2057 session->state = ISCSI_SESSION_FREE; 2058 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2059 INIT_LIST_HEAD(&session->sess_list); 2060 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2061 INIT_WORK(&session->block_work, __iscsi_block_session); 2062 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2063 INIT_WORK(&session->scan_work, iscsi_scan_session); 2064 spin_lock_init(&session->lock); 2065 2066 /* this is released in the dev's release function */ 2067 scsi_host_get(shost); 2068 session->dev.parent = &shost->shost_gendev; 2069 session->dev.release = iscsi_session_release; 2070 device_initialize(&session->dev); 2071 if (dd_size) 2072 session->dd_data = &session[1]; 2073 2074 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2075 return session; 2076 } 2077 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2078 2079 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2080 { 2081 unsigned long flags; 2082 int id = 0; 2083 int err; 2084 2085 session->sid = atomic_add_return(1, &iscsi_session_nr); 2086 2087 if (target_id == ISCSI_MAX_TARGET) { 2088 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); 2089 2090 if (id < 0) { 2091 iscsi_cls_session_printk(KERN_ERR, session, 2092 "Failure in Target ID Allocation\n"); 2093 return id; 2094 } 2095 session->target_id = (unsigned int)id; 2096 session->ida_used = true; 2097 } else 2098 session->target_id = target_id; 2099 2100 dev_set_name(&session->dev, "session%u", session->sid); 2101 err = device_add(&session->dev); 2102 if (err) { 2103 iscsi_cls_session_printk(KERN_ERR, session, 2104 "could not register session's dev\n"); 2105 goto release_ida; 2106 } 2107 transport_register_device(&session->dev); 2108 2109 spin_lock_irqsave(&sesslock, flags); 2110 list_add(&session->sess_list, &sesslist); 2111 spin_unlock_irqrestore(&sesslock, flags); 2112 2113 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2114 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2115 return 0; 2116 2117 release_ida: 2118 if (session->ida_used) 2119 ida_simple_remove(&iscsi_sess_ida, session->target_id); 2120 2121 return err; 2122 } 2123 EXPORT_SYMBOL_GPL(iscsi_add_session); 2124 2125 /** 2126 * iscsi_create_session - create iscsi class session 2127 * @shost: scsi host 2128 * @transport: iscsi transport 2129 * @dd_size: private driver data size 2130 * @target_id: which target 2131 * 2132 * This can be called from a LLD or iscsi_transport. 2133 */ 2134 struct iscsi_cls_session * 2135 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2136 int dd_size, unsigned int target_id) 2137 { 2138 struct iscsi_cls_session *session; 2139 2140 session = iscsi_alloc_session(shost, transport, dd_size); 2141 if (!session) 2142 return NULL; 2143 2144 if (iscsi_add_session(session, target_id)) { 2145 iscsi_free_session(session); 2146 return NULL; 2147 } 2148 return session; 2149 } 2150 EXPORT_SYMBOL_GPL(iscsi_create_session); 2151 2152 static void iscsi_conn_release(struct device *dev) 2153 { 2154 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2155 struct device *parent = conn->dev.parent; 2156 2157 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2158 kfree(conn); 2159 put_device(parent); 2160 } 2161 2162 static int iscsi_is_conn_dev(const struct device *dev) 2163 { 2164 return dev->release == iscsi_conn_release; 2165 } 2166 2167 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2168 { 2169 if (!iscsi_is_conn_dev(dev)) 2170 return 0; 2171 return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); 2172 } 2173 2174 void iscsi_remove_session(struct iscsi_cls_session *session) 2175 { 2176 unsigned long flags; 2177 int err; 2178 2179 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2180 2181 spin_lock_irqsave(&sesslock, flags); 2182 list_del(&session->sess_list); 2183 spin_unlock_irqrestore(&sesslock, flags); 2184 2185 /* make sure there are no blocks/unblocks queued */ 2186 flush_workqueue(iscsi_eh_timer_workq); 2187 /* make sure the timedout callout is not running */ 2188 if (!cancel_delayed_work(&session->recovery_work)) 2189 flush_workqueue(iscsi_eh_timer_workq); 2190 /* 2191 * If we are blocked let commands flow again. The lld or iscsi 2192 * layer should set up the queuecommand to fail commands. 2193 * We assume that LLD will not be calling block/unblock while 2194 * removing the session. 2195 */ 2196 spin_lock_irqsave(&session->lock, flags); 2197 session->state = ISCSI_SESSION_FREE; 2198 spin_unlock_irqrestore(&session->lock, flags); 2199 2200 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2201 /* flush running scans then delete devices */ 2202 flush_work(&session->scan_work); 2203 /* flush running unbind operations */ 2204 flush_work(&session->unbind_work); 2205 __iscsi_unbind_session(&session->unbind_work); 2206 2207 /* hw iscsi may not have removed all connections from session */ 2208 err = device_for_each_child(&session->dev, NULL, 2209 iscsi_iter_destroy_conn_fn); 2210 if (err) 2211 iscsi_cls_session_printk(KERN_ERR, session, 2212 "Could not delete all connections " 2213 "for session. Error %d.\n", err); 2214 2215 transport_unregister_device(&session->dev); 2216 2217 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2218 device_del(&session->dev); 2219 } 2220 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2221 2222 void iscsi_free_session(struct iscsi_cls_session *session) 2223 { 2224 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2225 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2226 put_device(&session->dev); 2227 } 2228 EXPORT_SYMBOL_GPL(iscsi_free_session); 2229 2230 /** 2231 * iscsi_create_conn - create iscsi class connection 2232 * @session: iscsi cls session 2233 * @dd_size: private driver data size 2234 * @cid: connection id 2235 * 2236 * This can be called from a LLD or iscsi_transport. The connection 2237 * is child of the session so cid must be unique for all connections 2238 * on the session. 2239 * 2240 * Since we do not support MCS, cid will normally be zero. In some cases 2241 * for software iscsi we could be trying to preallocate a connection struct 2242 * in which case there could be two connection structs and cid would be 2243 * non-zero. 2244 */ 2245 struct iscsi_cls_conn * 2246 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2247 { 2248 struct iscsi_transport *transport = session->transport; 2249 struct iscsi_cls_conn *conn; 2250 unsigned long flags; 2251 int err; 2252 2253 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2254 if (!conn) 2255 return NULL; 2256 if (dd_size) 2257 conn->dd_data = &conn[1]; 2258 2259 mutex_init(&conn->ep_mutex); 2260 INIT_LIST_HEAD(&conn->conn_list); 2261 conn->transport = transport; 2262 conn->cid = cid; 2263 2264 /* this is released in the dev's release function */ 2265 if (!get_device(&session->dev)) 2266 goto free_conn; 2267 2268 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2269 conn->dev.parent = &session->dev; 2270 conn->dev.release = iscsi_conn_release; 2271 err = device_register(&conn->dev); 2272 if (err) { 2273 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2274 "register connection's dev\n"); 2275 goto release_parent_ref; 2276 } 2277 transport_register_device(&conn->dev); 2278 2279 spin_lock_irqsave(&connlock, flags); 2280 list_add(&conn->conn_list, &connlist); 2281 spin_unlock_irqrestore(&connlock, flags); 2282 2283 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); 2284 return conn; 2285 2286 release_parent_ref: 2287 put_device(&session->dev); 2288 free_conn: 2289 kfree(conn); 2290 return NULL; 2291 } 2292 2293 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2294 2295 /** 2296 * iscsi_destroy_conn - destroy iscsi class connection 2297 * @conn: iscsi cls session 2298 * 2299 * This can be called from a LLD or iscsi_transport. 2300 */ 2301 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2302 { 2303 unsigned long flags; 2304 2305 spin_lock_irqsave(&connlock, flags); 2306 list_del(&conn->conn_list); 2307 spin_unlock_irqrestore(&connlock, flags); 2308 2309 transport_unregister_device(&conn->dev); 2310 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2311 device_unregister(&conn->dev); 2312 return 0; 2313 } 2314 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2315 2316 /* 2317 * iscsi interface functions 2318 */ 2319 static struct iscsi_internal * 2320 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2321 { 2322 struct iscsi_internal *priv; 2323 unsigned long flags; 2324 2325 spin_lock_irqsave(&iscsi_transport_lock, flags); 2326 list_for_each_entry(priv, &iscsi_transports, list) { 2327 if (tt == priv->iscsi_transport) { 2328 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2329 return priv; 2330 } 2331 } 2332 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2333 return NULL; 2334 } 2335 2336 static int 2337 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2338 { 2339 return nlmsg_multicast(nls, skb, 0, group, gfp); 2340 } 2341 2342 static int 2343 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2344 { 2345 return nlmsg_unicast(nls, skb, portid); 2346 } 2347 2348 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2349 char *data, uint32_t data_size) 2350 { 2351 struct nlmsghdr *nlh; 2352 struct sk_buff *skb; 2353 struct iscsi_uevent *ev; 2354 char *pdu; 2355 struct iscsi_internal *priv; 2356 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2357 data_size); 2358 2359 priv = iscsi_if_transport_lookup(conn->transport); 2360 if (!priv) 2361 return -EINVAL; 2362 2363 skb = alloc_skb(len, GFP_ATOMIC); 2364 if (!skb) { 2365 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2366 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2367 "control PDU: OOM\n"); 2368 return -ENOMEM; 2369 } 2370 2371 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2372 ev = nlmsg_data(nlh); 2373 memset(ev, 0, sizeof(*ev)); 2374 ev->transport_handle = iscsi_handle(conn->transport); 2375 ev->type = ISCSI_KEVENT_RECV_PDU; 2376 ev->r.recv_req.cid = conn->cid; 2377 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2378 pdu = (char*)ev + sizeof(*ev); 2379 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2380 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2381 2382 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2383 } 2384 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2385 2386 int iscsi_offload_mesg(struct Scsi_Host *shost, 2387 struct iscsi_transport *transport, uint32_t type, 2388 char *data, uint16_t data_size) 2389 { 2390 struct nlmsghdr *nlh; 2391 struct sk_buff *skb; 2392 struct iscsi_uevent *ev; 2393 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2394 2395 skb = alloc_skb(len, GFP_ATOMIC); 2396 if (!skb) { 2397 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2398 return -ENOMEM; 2399 } 2400 2401 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2402 ev = nlmsg_data(nlh); 2403 memset(ev, 0, sizeof(*ev)); 2404 ev->type = type; 2405 ev->transport_handle = iscsi_handle(transport); 2406 switch (type) { 2407 case ISCSI_KEVENT_PATH_REQ: 2408 ev->r.req_path.host_no = shost->host_no; 2409 break; 2410 case ISCSI_KEVENT_IF_DOWN: 2411 ev->r.notify_if_down.host_no = shost->host_no; 2412 break; 2413 } 2414 2415 memcpy((char *)ev + sizeof(*ev), data, data_size); 2416 2417 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2418 } 2419 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2420 2421 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2422 { 2423 struct nlmsghdr *nlh; 2424 struct sk_buff *skb; 2425 struct iscsi_uevent *ev; 2426 struct iscsi_internal *priv; 2427 int len = nlmsg_total_size(sizeof(*ev)); 2428 2429 priv = iscsi_if_transport_lookup(conn->transport); 2430 if (!priv) 2431 return; 2432 2433 skb = alloc_skb(len, GFP_ATOMIC); 2434 if (!skb) { 2435 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2436 "conn error (%d)\n", error); 2437 return; 2438 } 2439 2440 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2441 ev = nlmsg_data(nlh); 2442 ev->transport_handle = iscsi_handle(conn->transport); 2443 ev->type = ISCSI_KEVENT_CONN_ERROR; 2444 ev->r.connerror.error = error; 2445 ev->r.connerror.cid = conn->cid; 2446 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2447 2448 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2449 2450 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2451 error); 2452 } 2453 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2454 2455 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2456 enum iscsi_conn_state state) 2457 { 2458 struct nlmsghdr *nlh; 2459 struct sk_buff *skb; 2460 struct iscsi_uevent *ev; 2461 struct iscsi_internal *priv; 2462 int len = nlmsg_total_size(sizeof(*ev)); 2463 2464 priv = iscsi_if_transport_lookup(conn->transport); 2465 if (!priv) 2466 return; 2467 2468 skb = alloc_skb(len, GFP_ATOMIC); 2469 if (!skb) { 2470 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2471 "conn login (%d)\n", state); 2472 return; 2473 } 2474 2475 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2476 ev = nlmsg_data(nlh); 2477 ev->transport_handle = iscsi_handle(conn->transport); 2478 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2479 ev->r.conn_login.state = state; 2480 ev->r.conn_login.cid = conn->cid; 2481 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2482 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2483 2484 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2485 state); 2486 } 2487 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2488 2489 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2490 enum iscsi_host_event_code code, uint32_t data_size, 2491 uint8_t *data) 2492 { 2493 struct nlmsghdr *nlh; 2494 struct sk_buff *skb; 2495 struct iscsi_uevent *ev; 2496 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2497 2498 skb = alloc_skb(len, GFP_NOIO); 2499 if (!skb) { 2500 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2501 host_no, code); 2502 return; 2503 } 2504 2505 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2506 ev = nlmsg_data(nlh); 2507 ev->transport_handle = iscsi_handle(transport); 2508 ev->type = ISCSI_KEVENT_HOST_EVENT; 2509 ev->r.host_event.host_no = host_no; 2510 ev->r.host_event.code = code; 2511 ev->r.host_event.data_size = data_size; 2512 2513 if (data_size) 2514 memcpy((char *)ev + sizeof(*ev), data, data_size); 2515 2516 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2517 } 2518 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2519 2520 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2521 uint32_t status, uint32_t pid, uint32_t data_size, 2522 uint8_t *data) 2523 { 2524 struct nlmsghdr *nlh; 2525 struct sk_buff *skb; 2526 struct iscsi_uevent *ev; 2527 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2528 2529 skb = alloc_skb(len, GFP_NOIO); 2530 if (!skb) { 2531 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2532 return; 2533 } 2534 2535 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2536 ev = nlmsg_data(nlh); 2537 ev->transport_handle = iscsi_handle(transport); 2538 ev->type = ISCSI_KEVENT_PING_COMP; 2539 ev->r.ping_comp.host_no = host_no; 2540 ev->r.ping_comp.status = status; 2541 ev->r.ping_comp.pid = pid; 2542 ev->r.ping_comp.data_size = data_size; 2543 memcpy((char *)ev + sizeof(*ev), data, data_size); 2544 2545 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2546 } 2547 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2548 2549 static int 2550 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2551 { 2552 struct sk_buff *skb; 2553 struct nlmsghdr *nlh; 2554 int len = nlmsg_total_size(size); 2555 2556 skb = alloc_skb(len, GFP_ATOMIC); 2557 if (!skb) { 2558 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2559 return -ENOMEM; 2560 } 2561 2562 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2563 memcpy(nlmsg_data(nlh), payload, size); 2564 return iscsi_unicast_skb(skb, portid); 2565 } 2566 2567 static int 2568 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2569 { 2570 struct iscsi_uevent *ev = nlmsg_data(nlh); 2571 struct iscsi_stats *stats; 2572 struct sk_buff *skbstat; 2573 struct iscsi_cls_conn *conn; 2574 struct nlmsghdr *nlhstat; 2575 struct iscsi_uevent *evstat; 2576 struct iscsi_internal *priv; 2577 int len = nlmsg_total_size(sizeof(*ev) + 2578 sizeof(struct iscsi_stats) + 2579 sizeof(struct iscsi_stats_custom) * 2580 ISCSI_STATS_CUSTOM_MAX); 2581 int err = 0; 2582 2583 priv = iscsi_if_transport_lookup(transport); 2584 if (!priv) 2585 return -EINVAL; 2586 2587 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2588 if (!conn) 2589 return -EEXIST; 2590 2591 do { 2592 int actual_size; 2593 2594 skbstat = alloc_skb(len, GFP_ATOMIC); 2595 if (!skbstat) { 2596 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2597 "deliver stats: OOM\n"); 2598 return -ENOMEM; 2599 } 2600 2601 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2602 (len - sizeof(*nlhstat)), 0); 2603 evstat = nlmsg_data(nlhstat); 2604 memset(evstat, 0, sizeof(*evstat)); 2605 evstat->transport_handle = iscsi_handle(conn->transport); 2606 evstat->type = nlh->nlmsg_type; 2607 evstat->u.get_stats.cid = 2608 ev->u.get_stats.cid; 2609 evstat->u.get_stats.sid = 2610 ev->u.get_stats.sid; 2611 stats = (struct iscsi_stats *) 2612 ((char*)evstat + sizeof(*evstat)); 2613 memset(stats, 0, sizeof(*stats)); 2614 2615 transport->get_stats(conn, stats); 2616 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2617 sizeof(struct iscsi_stats) + 2618 sizeof(struct iscsi_stats_custom) * 2619 stats->custom_length); 2620 actual_size -= sizeof(*nlhstat); 2621 actual_size = nlmsg_msg_size(actual_size); 2622 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2623 nlhstat->nlmsg_len = actual_size; 2624 2625 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2626 GFP_ATOMIC); 2627 } while (err < 0 && err != -ECONNREFUSED); 2628 2629 return err; 2630 } 2631 2632 /** 2633 * iscsi_session_event - send session destr. completion event 2634 * @session: iscsi class session 2635 * @event: type of event 2636 */ 2637 int iscsi_session_event(struct iscsi_cls_session *session, 2638 enum iscsi_uevent_e event) 2639 { 2640 struct iscsi_internal *priv; 2641 struct Scsi_Host *shost; 2642 struct iscsi_uevent *ev; 2643 struct sk_buff *skb; 2644 struct nlmsghdr *nlh; 2645 int rc, len = nlmsg_total_size(sizeof(*ev)); 2646 2647 priv = iscsi_if_transport_lookup(session->transport); 2648 if (!priv) 2649 return -EINVAL; 2650 shost = iscsi_session_to_shost(session); 2651 2652 skb = alloc_skb(len, GFP_KERNEL); 2653 if (!skb) { 2654 iscsi_cls_session_printk(KERN_ERR, session, 2655 "Cannot notify userspace of session " 2656 "event %u\n", event); 2657 return -ENOMEM; 2658 } 2659 2660 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2661 ev = nlmsg_data(nlh); 2662 ev->transport_handle = iscsi_handle(session->transport); 2663 2664 ev->type = event; 2665 switch (event) { 2666 case ISCSI_KEVENT_DESTROY_SESSION: 2667 ev->r.d_session.host_no = shost->host_no; 2668 ev->r.d_session.sid = session->sid; 2669 break; 2670 case ISCSI_KEVENT_CREATE_SESSION: 2671 ev->r.c_session_ret.host_no = shost->host_no; 2672 ev->r.c_session_ret.sid = session->sid; 2673 break; 2674 case ISCSI_KEVENT_UNBIND_SESSION: 2675 ev->r.unbind_session.host_no = shost->host_no; 2676 ev->r.unbind_session.sid = session->sid; 2677 break; 2678 default: 2679 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2680 "%u.\n", event); 2681 kfree_skb(skb); 2682 return -EINVAL; 2683 } 2684 2685 /* 2686 * this will occur if the daemon is not up, so we just warn 2687 * the user and when the daemon is restarted it will handle it 2688 */ 2689 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2690 if (rc == -ESRCH) 2691 iscsi_cls_session_printk(KERN_ERR, session, 2692 "Cannot notify userspace of session " 2693 "event %u. Check iscsi daemon\n", 2694 event); 2695 2696 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2697 event, rc); 2698 return rc; 2699 } 2700 EXPORT_SYMBOL_GPL(iscsi_session_event); 2701 2702 static int 2703 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2704 struct iscsi_uevent *ev, pid_t pid, 2705 uint32_t initial_cmdsn, uint16_t cmds_max, 2706 uint16_t queue_depth) 2707 { 2708 struct iscsi_transport *transport = priv->iscsi_transport; 2709 struct iscsi_cls_session *session; 2710 struct Scsi_Host *shost; 2711 2712 session = transport->create_session(ep, cmds_max, queue_depth, 2713 initial_cmdsn); 2714 if (!session) 2715 return -ENOMEM; 2716 2717 session->creator = pid; 2718 shost = iscsi_session_to_shost(session); 2719 ev->r.c_session_ret.host_no = shost->host_no; 2720 ev->r.c_session_ret.sid = session->sid; 2721 ISCSI_DBG_TRANS_SESSION(session, 2722 "Completed creating transport session\n"); 2723 return 0; 2724 } 2725 2726 static int 2727 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2728 { 2729 struct iscsi_cls_conn *conn; 2730 struct iscsi_cls_session *session; 2731 2732 session = iscsi_session_lookup(ev->u.c_conn.sid); 2733 if (!session) { 2734 printk(KERN_ERR "iscsi: invalid session %d.\n", 2735 ev->u.c_conn.sid); 2736 return -EINVAL; 2737 } 2738 2739 conn = transport->create_conn(session, ev->u.c_conn.cid); 2740 if (!conn) { 2741 iscsi_cls_session_printk(KERN_ERR, session, 2742 "couldn't create a new connection."); 2743 return -ENOMEM; 2744 } 2745 2746 ev->r.c_conn_ret.sid = session->sid; 2747 ev->r.c_conn_ret.cid = conn->cid; 2748 2749 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2750 return 0; 2751 } 2752 2753 static int 2754 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2755 { 2756 struct iscsi_cls_conn *conn; 2757 2758 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2759 if (!conn) 2760 return -EINVAL; 2761 2762 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2763 if (transport->destroy_conn) 2764 transport->destroy_conn(conn); 2765 2766 return 0; 2767 } 2768 2769 static int 2770 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2771 { 2772 char *data = (char*)ev + sizeof(*ev); 2773 struct iscsi_cls_conn *conn; 2774 struct iscsi_cls_session *session; 2775 int err = 0, value = 0; 2776 2777 session = iscsi_session_lookup(ev->u.set_param.sid); 2778 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2779 if (!conn || !session) 2780 return -EINVAL; 2781 2782 switch (ev->u.set_param.param) { 2783 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2784 sscanf(data, "%d", &value); 2785 if (!session->recovery_tmo_sysfs_override) 2786 session->recovery_tmo = value; 2787 break; 2788 default: 2789 err = transport->set_param(conn, ev->u.set_param.param, 2790 data, ev->u.set_param.len); 2791 } 2792 2793 return err; 2794 } 2795 2796 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2797 struct iscsi_uevent *ev, int msg_type) 2798 { 2799 struct iscsi_endpoint *ep; 2800 struct sockaddr *dst_addr; 2801 struct Scsi_Host *shost = NULL; 2802 int non_blocking, err = 0; 2803 2804 if (!transport->ep_connect) 2805 return -EINVAL; 2806 2807 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2808 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2809 if (!shost) { 2810 printk(KERN_ERR "ep connect failed. Could not find " 2811 "host no %u\n", 2812 ev->u.ep_connect_through_host.host_no); 2813 return -ENODEV; 2814 } 2815 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2816 } else 2817 non_blocking = ev->u.ep_connect.non_blocking; 2818 2819 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2820 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2821 if (IS_ERR(ep)) { 2822 err = PTR_ERR(ep); 2823 goto release_host; 2824 } 2825 2826 ev->r.ep_connect_ret.handle = ep->id; 2827 release_host: 2828 if (shost) 2829 scsi_host_put(shost); 2830 return err; 2831 } 2832 2833 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2834 u64 ep_handle) 2835 { 2836 struct iscsi_cls_conn *conn; 2837 struct iscsi_endpoint *ep; 2838 2839 if (!transport->ep_disconnect) 2840 return -EINVAL; 2841 2842 ep = iscsi_lookup_endpoint(ep_handle); 2843 if (!ep) 2844 return -EINVAL; 2845 conn = ep->conn; 2846 if (conn) { 2847 mutex_lock(&conn->ep_mutex); 2848 conn->ep = NULL; 2849 mutex_unlock(&conn->ep_mutex); 2850 } 2851 2852 transport->ep_disconnect(ep); 2853 return 0; 2854 } 2855 2856 static int 2857 iscsi_if_transport_ep(struct iscsi_transport *transport, 2858 struct iscsi_uevent *ev, int msg_type) 2859 { 2860 struct iscsi_endpoint *ep; 2861 int rc = 0; 2862 2863 switch (msg_type) { 2864 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2865 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2866 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2867 break; 2868 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2869 if (!transport->ep_poll) 2870 return -EINVAL; 2871 2872 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2873 if (!ep) 2874 return -EINVAL; 2875 2876 ev->r.retcode = transport->ep_poll(ep, 2877 ev->u.ep_poll.timeout_ms); 2878 break; 2879 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 2880 rc = iscsi_if_ep_disconnect(transport, 2881 ev->u.ep_disconnect.ep_handle); 2882 break; 2883 } 2884 return rc; 2885 } 2886 2887 static int 2888 iscsi_tgt_dscvr(struct iscsi_transport *transport, 2889 struct iscsi_uevent *ev) 2890 { 2891 struct Scsi_Host *shost; 2892 struct sockaddr *dst_addr; 2893 int err; 2894 2895 if (!transport->tgt_dscvr) 2896 return -EINVAL; 2897 2898 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 2899 if (!shost) { 2900 printk(KERN_ERR "target discovery could not find host no %u\n", 2901 ev->u.tgt_dscvr.host_no); 2902 return -ENODEV; 2903 } 2904 2905 2906 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2907 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 2908 ev->u.tgt_dscvr.enable, dst_addr); 2909 scsi_host_put(shost); 2910 return err; 2911 } 2912 2913 static int 2914 iscsi_set_host_param(struct iscsi_transport *transport, 2915 struct iscsi_uevent *ev) 2916 { 2917 char *data = (char*)ev + sizeof(*ev); 2918 struct Scsi_Host *shost; 2919 int err; 2920 2921 if (!transport->set_host_param) 2922 return -ENOSYS; 2923 2924 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 2925 if (!shost) { 2926 printk(KERN_ERR "set_host_param could not find host no %u\n", 2927 ev->u.set_host_param.host_no); 2928 return -ENODEV; 2929 } 2930 2931 err = transport->set_host_param(shost, ev->u.set_host_param.param, 2932 data, ev->u.set_host_param.len); 2933 scsi_host_put(shost); 2934 return err; 2935 } 2936 2937 static int 2938 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2939 { 2940 struct Scsi_Host *shost; 2941 struct iscsi_path *params; 2942 int err; 2943 2944 if (!transport->set_path) 2945 return -ENOSYS; 2946 2947 shost = scsi_host_lookup(ev->u.set_path.host_no); 2948 if (!shost) { 2949 printk(KERN_ERR "set path could not find host no %u\n", 2950 ev->u.set_path.host_no); 2951 return -ENODEV; 2952 } 2953 2954 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 2955 err = transport->set_path(shost, params); 2956 2957 scsi_host_put(shost); 2958 return err; 2959 } 2960 2961 static int 2962 iscsi_set_iface_params(struct iscsi_transport *transport, 2963 struct iscsi_uevent *ev, uint32_t len) 2964 { 2965 char *data = (char *)ev + sizeof(*ev); 2966 struct Scsi_Host *shost; 2967 int err; 2968 2969 if (!transport->set_iface_param) 2970 return -ENOSYS; 2971 2972 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 2973 if (!shost) { 2974 printk(KERN_ERR "set_iface_params could not find host no %u\n", 2975 ev->u.set_iface_params.host_no); 2976 return -ENODEV; 2977 } 2978 2979 err = transport->set_iface_param(shost, data, len); 2980 scsi_host_put(shost); 2981 return err; 2982 } 2983 2984 static int 2985 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2986 { 2987 struct Scsi_Host *shost; 2988 struct sockaddr *dst_addr; 2989 int err; 2990 2991 if (!transport->send_ping) 2992 return -ENOSYS; 2993 2994 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 2995 if (!shost) { 2996 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 2997 ev->u.iscsi_ping.host_no); 2998 return -ENODEV; 2999 } 3000 3001 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3002 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3003 ev->u.iscsi_ping.iface_type, 3004 ev->u.iscsi_ping.payload_size, 3005 ev->u.iscsi_ping.pid, 3006 dst_addr); 3007 scsi_host_put(shost); 3008 return err; 3009 } 3010 3011 static int 3012 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3013 { 3014 struct iscsi_uevent *ev = nlmsg_data(nlh); 3015 struct Scsi_Host *shost = NULL; 3016 struct iscsi_chap_rec *chap_rec; 3017 struct iscsi_internal *priv; 3018 struct sk_buff *skbchap; 3019 struct nlmsghdr *nlhchap; 3020 struct iscsi_uevent *evchap; 3021 uint32_t chap_buf_size; 3022 int len, err = 0; 3023 char *buf; 3024 3025 if (!transport->get_chap) 3026 return -EINVAL; 3027 3028 priv = iscsi_if_transport_lookup(transport); 3029 if (!priv) 3030 return -EINVAL; 3031 3032 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3033 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3034 3035 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3036 if (!shost) { 3037 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3038 __func__, ev->u.get_chap.host_no); 3039 return -ENODEV; 3040 } 3041 3042 do { 3043 int actual_size; 3044 3045 skbchap = alloc_skb(len, GFP_KERNEL); 3046 if (!skbchap) { 3047 printk(KERN_ERR "can not deliver chap: OOM\n"); 3048 err = -ENOMEM; 3049 goto exit_get_chap; 3050 } 3051 3052 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3053 (len - sizeof(*nlhchap)), 0); 3054 evchap = nlmsg_data(nlhchap); 3055 memset(evchap, 0, sizeof(*evchap)); 3056 evchap->transport_handle = iscsi_handle(transport); 3057 evchap->type = nlh->nlmsg_type; 3058 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3059 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3060 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3061 buf = (char *)evchap + sizeof(*evchap); 3062 memset(buf, 0, chap_buf_size); 3063 3064 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3065 &evchap->u.get_chap.num_entries, buf); 3066 3067 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3068 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3069 nlhchap->nlmsg_len = actual_size; 3070 3071 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3072 GFP_KERNEL); 3073 } while (err < 0 && err != -ECONNREFUSED); 3074 3075 exit_get_chap: 3076 scsi_host_put(shost); 3077 return err; 3078 } 3079 3080 static int iscsi_set_chap(struct iscsi_transport *transport, 3081 struct iscsi_uevent *ev, uint32_t len) 3082 { 3083 char *data = (char *)ev + sizeof(*ev); 3084 struct Scsi_Host *shost; 3085 int err = 0; 3086 3087 if (!transport->set_chap) 3088 return -ENOSYS; 3089 3090 shost = scsi_host_lookup(ev->u.set_path.host_no); 3091 if (!shost) { 3092 pr_err("%s could not find host no %u\n", 3093 __func__, ev->u.set_path.host_no); 3094 return -ENODEV; 3095 } 3096 3097 err = transport->set_chap(shost, data, len); 3098 scsi_host_put(shost); 3099 return err; 3100 } 3101 3102 static int iscsi_delete_chap(struct iscsi_transport *transport, 3103 struct iscsi_uevent *ev) 3104 { 3105 struct Scsi_Host *shost; 3106 int err = 0; 3107 3108 if (!transport->delete_chap) 3109 return -ENOSYS; 3110 3111 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3112 if (!shost) { 3113 printk(KERN_ERR "%s could not find host no %u\n", 3114 __func__, ev->u.delete_chap.host_no); 3115 return -ENODEV; 3116 } 3117 3118 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3119 scsi_host_put(shost); 3120 return err; 3121 } 3122 3123 static const struct { 3124 enum iscsi_discovery_parent_type value; 3125 char *name; 3126 } iscsi_discovery_parent_names[] = { 3127 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3128 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3129 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3130 }; 3131 3132 char *iscsi_get_discovery_parent_name(int parent_type) 3133 { 3134 int i; 3135 char *state = "Unknown!"; 3136 3137 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3138 if (iscsi_discovery_parent_names[i].value & parent_type) { 3139 state = iscsi_discovery_parent_names[i].name; 3140 break; 3141 } 3142 } 3143 return state; 3144 } 3145 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3146 3147 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3148 struct iscsi_uevent *ev, uint32_t len) 3149 { 3150 char *data = (char *)ev + sizeof(*ev); 3151 struct Scsi_Host *shost; 3152 struct iscsi_bus_flash_session *fnode_sess; 3153 struct iscsi_bus_flash_conn *fnode_conn; 3154 struct device *dev; 3155 uint32_t idx; 3156 int err = 0; 3157 3158 if (!transport->set_flashnode_param) { 3159 err = -ENOSYS; 3160 goto exit_set_fnode; 3161 } 3162 3163 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3164 if (!shost) { 3165 pr_err("%s could not find host no %u\n", 3166 __func__, ev->u.set_flashnode.host_no); 3167 err = -ENODEV; 3168 goto put_host; 3169 } 3170 3171 idx = ev->u.set_flashnode.flashnode_idx; 3172 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3173 if (!fnode_sess) { 3174 pr_err("%s could not find flashnode %u for host no %u\n", 3175 __func__, idx, ev->u.set_flashnode.host_no); 3176 err = -ENODEV; 3177 goto put_host; 3178 } 3179 3180 dev = iscsi_find_flashnode_conn(fnode_sess); 3181 if (!dev) { 3182 err = -ENODEV; 3183 goto put_sess; 3184 } 3185 3186 fnode_conn = iscsi_dev_to_flash_conn(dev); 3187 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3188 put_device(dev); 3189 3190 put_sess: 3191 put_device(&fnode_sess->dev); 3192 3193 put_host: 3194 scsi_host_put(shost); 3195 3196 exit_set_fnode: 3197 return err; 3198 } 3199 3200 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3201 struct iscsi_uevent *ev, uint32_t len) 3202 { 3203 char *data = (char *)ev + sizeof(*ev); 3204 struct Scsi_Host *shost; 3205 int index; 3206 int err = 0; 3207 3208 if (!transport->new_flashnode) { 3209 err = -ENOSYS; 3210 goto exit_new_fnode; 3211 } 3212 3213 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3214 if (!shost) { 3215 pr_err("%s could not find host no %u\n", 3216 __func__, ev->u.new_flashnode.host_no); 3217 err = -ENODEV; 3218 goto put_host; 3219 } 3220 3221 index = transport->new_flashnode(shost, data, len); 3222 3223 if (index >= 0) 3224 ev->r.new_flashnode_ret.flashnode_idx = index; 3225 else 3226 err = -EIO; 3227 3228 put_host: 3229 scsi_host_put(shost); 3230 3231 exit_new_fnode: 3232 return err; 3233 } 3234 3235 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3236 struct iscsi_uevent *ev) 3237 { 3238 struct Scsi_Host *shost; 3239 struct iscsi_bus_flash_session *fnode_sess; 3240 uint32_t idx; 3241 int err = 0; 3242 3243 if (!transport->del_flashnode) { 3244 err = -ENOSYS; 3245 goto exit_del_fnode; 3246 } 3247 3248 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3249 if (!shost) { 3250 pr_err("%s could not find host no %u\n", 3251 __func__, ev->u.del_flashnode.host_no); 3252 err = -ENODEV; 3253 goto put_host; 3254 } 3255 3256 idx = ev->u.del_flashnode.flashnode_idx; 3257 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3258 if (!fnode_sess) { 3259 pr_err("%s could not find flashnode %u for host no %u\n", 3260 __func__, idx, ev->u.del_flashnode.host_no); 3261 err = -ENODEV; 3262 goto put_host; 3263 } 3264 3265 err = transport->del_flashnode(fnode_sess); 3266 put_device(&fnode_sess->dev); 3267 3268 put_host: 3269 scsi_host_put(shost); 3270 3271 exit_del_fnode: 3272 return err; 3273 } 3274 3275 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3276 struct iscsi_uevent *ev) 3277 { 3278 struct Scsi_Host *shost; 3279 struct iscsi_bus_flash_session *fnode_sess; 3280 struct iscsi_bus_flash_conn *fnode_conn; 3281 struct device *dev; 3282 uint32_t idx; 3283 int err = 0; 3284 3285 if (!transport->login_flashnode) { 3286 err = -ENOSYS; 3287 goto exit_login_fnode; 3288 } 3289 3290 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3291 if (!shost) { 3292 pr_err("%s could not find host no %u\n", 3293 __func__, ev->u.login_flashnode.host_no); 3294 err = -ENODEV; 3295 goto put_host; 3296 } 3297 3298 idx = ev->u.login_flashnode.flashnode_idx; 3299 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3300 if (!fnode_sess) { 3301 pr_err("%s could not find flashnode %u for host no %u\n", 3302 __func__, idx, ev->u.login_flashnode.host_no); 3303 err = -ENODEV; 3304 goto put_host; 3305 } 3306 3307 dev = iscsi_find_flashnode_conn(fnode_sess); 3308 if (!dev) { 3309 err = -ENODEV; 3310 goto put_sess; 3311 } 3312 3313 fnode_conn = iscsi_dev_to_flash_conn(dev); 3314 err = transport->login_flashnode(fnode_sess, fnode_conn); 3315 put_device(dev); 3316 3317 put_sess: 3318 put_device(&fnode_sess->dev); 3319 3320 put_host: 3321 scsi_host_put(shost); 3322 3323 exit_login_fnode: 3324 return err; 3325 } 3326 3327 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3328 struct iscsi_uevent *ev) 3329 { 3330 struct Scsi_Host *shost; 3331 struct iscsi_bus_flash_session *fnode_sess; 3332 struct iscsi_bus_flash_conn *fnode_conn; 3333 struct device *dev; 3334 uint32_t idx; 3335 int err = 0; 3336 3337 if (!transport->logout_flashnode) { 3338 err = -ENOSYS; 3339 goto exit_logout_fnode; 3340 } 3341 3342 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3343 if (!shost) { 3344 pr_err("%s could not find host no %u\n", 3345 __func__, ev->u.logout_flashnode.host_no); 3346 err = -ENODEV; 3347 goto put_host; 3348 } 3349 3350 idx = ev->u.logout_flashnode.flashnode_idx; 3351 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3352 if (!fnode_sess) { 3353 pr_err("%s could not find flashnode %u for host no %u\n", 3354 __func__, idx, ev->u.logout_flashnode.host_no); 3355 err = -ENODEV; 3356 goto put_host; 3357 } 3358 3359 dev = iscsi_find_flashnode_conn(fnode_sess); 3360 if (!dev) { 3361 err = -ENODEV; 3362 goto put_sess; 3363 } 3364 3365 fnode_conn = iscsi_dev_to_flash_conn(dev); 3366 3367 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3368 put_device(dev); 3369 3370 put_sess: 3371 put_device(&fnode_sess->dev); 3372 3373 put_host: 3374 scsi_host_put(shost); 3375 3376 exit_logout_fnode: 3377 return err; 3378 } 3379 3380 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3381 struct iscsi_uevent *ev) 3382 { 3383 struct Scsi_Host *shost; 3384 struct iscsi_cls_session *session; 3385 int err = 0; 3386 3387 if (!transport->logout_flashnode_sid) { 3388 err = -ENOSYS; 3389 goto exit_logout_sid; 3390 } 3391 3392 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3393 if (!shost) { 3394 pr_err("%s could not find host no %u\n", 3395 __func__, ev->u.logout_flashnode.host_no); 3396 err = -ENODEV; 3397 goto put_host; 3398 } 3399 3400 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3401 if (!session) { 3402 pr_err("%s could not find session id %u\n", 3403 __func__, ev->u.logout_flashnode_sid.sid); 3404 err = -EINVAL; 3405 goto put_host; 3406 } 3407 3408 err = transport->logout_flashnode_sid(session); 3409 3410 put_host: 3411 scsi_host_put(shost); 3412 3413 exit_logout_sid: 3414 return err; 3415 } 3416 3417 static int 3418 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3419 { 3420 struct iscsi_uevent *ev = nlmsg_data(nlh); 3421 struct Scsi_Host *shost = NULL; 3422 struct iscsi_internal *priv; 3423 struct sk_buff *skbhost_stats; 3424 struct nlmsghdr *nlhhost_stats; 3425 struct iscsi_uevent *evhost_stats; 3426 int host_stats_size = 0; 3427 int len, err = 0; 3428 char *buf; 3429 3430 if (!transport->get_host_stats) 3431 return -ENOSYS; 3432 3433 priv = iscsi_if_transport_lookup(transport); 3434 if (!priv) 3435 return -EINVAL; 3436 3437 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3438 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3439 3440 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3441 if (!shost) { 3442 pr_err("%s: failed. Could not find host no %u\n", 3443 __func__, ev->u.get_host_stats.host_no); 3444 return -ENODEV; 3445 } 3446 3447 do { 3448 int actual_size; 3449 3450 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3451 if (!skbhost_stats) { 3452 pr_err("cannot deliver host stats: OOM\n"); 3453 err = -ENOMEM; 3454 goto exit_host_stats; 3455 } 3456 3457 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3458 (len - sizeof(*nlhhost_stats)), 0); 3459 evhost_stats = nlmsg_data(nlhhost_stats); 3460 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3461 evhost_stats->transport_handle = iscsi_handle(transport); 3462 evhost_stats->type = nlh->nlmsg_type; 3463 evhost_stats->u.get_host_stats.host_no = 3464 ev->u.get_host_stats.host_no; 3465 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3466 memset(buf, 0, host_stats_size); 3467 3468 err = transport->get_host_stats(shost, buf, host_stats_size); 3469 if (err) { 3470 kfree_skb(skbhost_stats); 3471 goto exit_host_stats; 3472 } 3473 3474 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3475 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3476 nlhhost_stats->nlmsg_len = actual_size; 3477 3478 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3479 GFP_KERNEL); 3480 } while (err < 0 && err != -ECONNREFUSED); 3481 3482 exit_host_stats: 3483 scsi_host_put(shost); 3484 return err; 3485 } 3486 3487 3488 static int 3489 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3490 { 3491 int err = 0; 3492 u32 portid; 3493 struct iscsi_uevent *ev = nlmsg_data(nlh); 3494 struct iscsi_transport *transport = NULL; 3495 struct iscsi_internal *priv; 3496 struct iscsi_cls_session *session; 3497 struct iscsi_cls_conn *conn; 3498 struct iscsi_endpoint *ep = NULL; 3499 3500 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3501 *group = ISCSI_NL_GRP_UIP; 3502 else 3503 *group = ISCSI_NL_GRP_ISCSID; 3504 3505 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3506 if (!priv) 3507 return -EINVAL; 3508 transport = priv->iscsi_transport; 3509 3510 if (!try_module_get(transport->owner)) 3511 return -EINVAL; 3512 3513 portid = NETLINK_CB(skb).portid; 3514 3515 switch (nlh->nlmsg_type) { 3516 case ISCSI_UEVENT_CREATE_SESSION: 3517 err = iscsi_if_create_session(priv, ep, ev, 3518 portid, 3519 ev->u.c_session.initial_cmdsn, 3520 ev->u.c_session.cmds_max, 3521 ev->u.c_session.queue_depth); 3522 break; 3523 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3524 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3525 if (!ep) { 3526 err = -EINVAL; 3527 break; 3528 } 3529 3530 err = iscsi_if_create_session(priv, ep, ev, 3531 portid, 3532 ev->u.c_bound_session.initial_cmdsn, 3533 ev->u.c_bound_session.cmds_max, 3534 ev->u.c_bound_session.queue_depth); 3535 break; 3536 case ISCSI_UEVENT_DESTROY_SESSION: 3537 session = iscsi_session_lookup(ev->u.d_session.sid); 3538 if (session) 3539 transport->destroy_session(session); 3540 else 3541 err = -EINVAL; 3542 break; 3543 case ISCSI_UEVENT_UNBIND_SESSION: 3544 session = iscsi_session_lookup(ev->u.d_session.sid); 3545 if (session) 3546 scsi_queue_work(iscsi_session_to_shost(session), 3547 &session->unbind_work); 3548 else 3549 err = -EINVAL; 3550 break; 3551 case ISCSI_UEVENT_CREATE_CONN: 3552 err = iscsi_if_create_conn(transport, ev); 3553 break; 3554 case ISCSI_UEVENT_DESTROY_CONN: 3555 err = iscsi_if_destroy_conn(transport, ev); 3556 break; 3557 case ISCSI_UEVENT_BIND_CONN: 3558 session = iscsi_session_lookup(ev->u.b_conn.sid); 3559 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3560 3561 if (conn && conn->ep) 3562 iscsi_if_ep_disconnect(transport, conn->ep->id); 3563 3564 if (!session || !conn) { 3565 err = -EINVAL; 3566 break; 3567 } 3568 3569 ev->r.retcode = transport->bind_conn(session, conn, 3570 ev->u.b_conn.transport_eph, 3571 ev->u.b_conn.is_leading); 3572 if (ev->r.retcode || !transport->ep_connect) 3573 break; 3574 3575 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3576 if (ep) { 3577 ep->conn = conn; 3578 3579 mutex_lock(&conn->ep_mutex); 3580 conn->ep = ep; 3581 mutex_unlock(&conn->ep_mutex); 3582 } else 3583 iscsi_cls_conn_printk(KERN_ERR, conn, 3584 "Could not set ep conn " 3585 "binding\n"); 3586 break; 3587 case ISCSI_UEVENT_SET_PARAM: 3588 err = iscsi_set_param(transport, ev); 3589 break; 3590 case ISCSI_UEVENT_START_CONN: 3591 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3592 if (conn) 3593 ev->r.retcode = transport->start_conn(conn); 3594 else 3595 err = -EINVAL; 3596 break; 3597 case ISCSI_UEVENT_STOP_CONN: 3598 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3599 if (conn) 3600 transport->stop_conn(conn, ev->u.stop_conn.flag); 3601 else 3602 err = -EINVAL; 3603 break; 3604 case ISCSI_UEVENT_SEND_PDU: 3605 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3606 if (conn) 3607 ev->r.retcode = transport->send_pdu(conn, 3608 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3609 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3610 ev->u.send_pdu.data_size); 3611 else 3612 err = -EINVAL; 3613 break; 3614 case ISCSI_UEVENT_GET_STATS: 3615 err = iscsi_if_get_stats(transport, nlh); 3616 break; 3617 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3618 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3619 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3620 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3621 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3622 break; 3623 case ISCSI_UEVENT_TGT_DSCVR: 3624 err = iscsi_tgt_dscvr(transport, ev); 3625 break; 3626 case ISCSI_UEVENT_SET_HOST_PARAM: 3627 err = iscsi_set_host_param(transport, ev); 3628 break; 3629 case ISCSI_UEVENT_PATH_UPDATE: 3630 err = iscsi_set_path(transport, ev); 3631 break; 3632 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3633 err = iscsi_set_iface_params(transport, ev, 3634 nlmsg_attrlen(nlh, sizeof(*ev))); 3635 break; 3636 case ISCSI_UEVENT_PING: 3637 err = iscsi_send_ping(transport, ev); 3638 break; 3639 case ISCSI_UEVENT_GET_CHAP: 3640 err = iscsi_get_chap(transport, nlh); 3641 break; 3642 case ISCSI_UEVENT_DELETE_CHAP: 3643 err = iscsi_delete_chap(transport, ev); 3644 break; 3645 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3646 err = iscsi_set_flashnode_param(transport, ev, 3647 nlmsg_attrlen(nlh, 3648 sizeof(*ev))); 3649 break; 3650 case ISCSI_UEVENT_NEW_FLASHNODE: 3651 err = iscsi_new_flashnode(transport, ev, 3652 nlmsg_attrlen(nlh, sizeof(*ev))); 3653 break; 3654 case ISCSI_UEVENT_DEL_FLASHNODE: 3655 err = iscsi_del_flashnode(transport, ev); 3656 break; 3657 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3658 err = iscsi_login_flashnode(transport, ev); 3659 break; 3660 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3661 err = iscsi_logout_flashnode(transport, ev); 3662 break; 3663 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3664 err = iscsi_logout_flashnode_sid(transport, ev); 3665 break; 3666 case ISCSI_UEVENT_SET_CHAP: 3667 err = iscsi_set_chap(transport, ev, 3668 nlmsg_attrlen(nlh, sizeof(*ev))); 3669 break; 3670 case ISCSI_UEVENT_GET_HOST_STATS: 3671 err = iscsi_get_host_stats(transport, nlh); 3672 break; 3673 default: 3674 err = -ENOSYS; 3675 break; 3676 } 3677 3678 module_put(transport->owner); 3679 return err; 3680 } 3681 3682 /* 3683 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3684 * Malformed skbs with wrong lengths or invalid creds are not processed. 3685 */ 3686 static void 3687 iscsi_if_rx(struct sk_buff *skb) 3688 { 3689 u32 portid = NETLINK_CB(skb).portid; 3690 3691 mutex_lock(&rx_queue_mutex); 3692 while (skb->len >= NLMSG_HDRLEN) { 3693 int err; 3694 uint32_t rlen; 3695 struct nlmsghdr *nlh; 3696 struct iscsi_uevent *ev; 3697 uint32_t group; 3698 3699 nlh = nlmsg_hdr(skb); 3700 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3701 skb->len < nlh->nlmsg_len) { 3702 break; 3703 } 3704 3705 ev = nlmsg_data(nlh); 3706 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3707 if (rlen > skb->len) 3708 rlen = skb->len; 3709 3710 err = iscsi_if_recv_msg(skb, nlh, &group); 3711 if (err) { 3712 ev->type = ISCSI_KEVENT_IF_ERROR; 3713 ev->iferror = err; 3714 } 3715 do { 3716 /* 3717 * special case for GET_STATS: 3718 * on success - sending reply and stats from 3719 * inside of if_recv_msg(), 3720 * on error - fall through. 3721 */ 3722 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3723 break; 3724 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3725 break; 3726 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3727 ev, sizeof(*ev)); 3728 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3729 skb_pull(skb, rlen); 3730 } 3731 mutex_unlock(&rx_queue_mutex); 3732 } 3733 3734 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3735 struct device_attribute dev_attr_##_prefix##_##_name = \ 3736 __ATTR(_name,_mode,_show,_store) 3737 3738 /* 3739 * iSCSI connection attrs 3740 */ 3741 #define iscsi_conn_attr_show(param) \ 3742 static ssize_t \ 3743 show_conn_param_##param(struct device *dev, \ 3744 struct device_attribute *attr, char *buf) \ 3745 { \ 3746 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3747 struct iscsi_transport *t = conn->transport; \ 3748 return t->get_conn_param(conn, param, buf); \ 3749 } 3750 3751 #define iscsi_conn_attr(field, param) \ 3752 iscsi_conn_attr_show(param) \ 3753 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3754 NULL); 3755 3756 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3757 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3758 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3759 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3760 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3761 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3762 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3763 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3764 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3765 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3766 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3767 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3768 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3769 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3770 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3771 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3772 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3773 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3774 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3775 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3776 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3777 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3778 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3779 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3780 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3781 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3782 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3783 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3784 3785 3786 #define iscsi_conn_ep_attr_show(param) \ 3787 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 3788 struct device_attribute *attr,\ 3789 char *buf) \ 3790 { \ 3791 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3792 struct iscsi_transport *t = conn->transport; \ 3793 struct iscsi_endpoint *ep; \ 3794 ssize_t rc; \ 3795 \ 3796 /* \ 3797 * Need to make sure ep_disconnect does not free the LLD's \ 3798 * interconnect resources while we are trying to read them. \ 3799 */ \ 3800 mutex_lock(&conn->ep_mutex); \ 3801 ep = conn->ep; \ 3802 if (!ep && t->ep_connect) { \ 3803 mutex_unlock(&conn->ep_mutex); \ 3804 return -ENOTCONN; \ 3805 } \ 3806 \ 3807 if (ep) \ 3808 rc = t->get_ep_param(ep, param, buf); \ 3809 else \ 3810 rc = t->get_conn_param(conn, param, buf); \ 3811 mutex_unlock(&conn->ep_mutex); \ 3812 return rc; \ 3813 } 3814 3815 #define iscsi_conn_ep_attr(field, param) \ 3816 iscsi_conn_ep_attr_show(param) \ 3817 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 3818 show_conn_ep_param_##param, NULL); 3819 3820 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 3821 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 3822 3823 static struct attribute *iscsi_conn_attrs[] = { 3824 &dev_attr_conn_max_recv_dlength.attr, 3825 &dev_attr_conn_max_xmit_dlength.attr, 3826 &dev_attr_conn_header_digest.attr, 3827 &dev_attr_conn_data_digest.attr, 3828 &dev_attr_conn_ifmarker.attr, 3829 &dev_attr_conn_ofmarker.attr, 3830 &dev_attr_conn_address.attr, 3831 &dev_attr_conn_port.attr, 3832 &dev_attr_conn_exp_statsn.attr, 3833 &dev_attr_conn_persistent_address.attr, 3834 &dev_attr_conn_persistent_port.attr, 3835 &dev_attr_conn_ping_tmo.attr, 3836 &dev_attr_conn_recv_tmo.attr, 3837 &dev_attr_conn_local_port.attr, 3838 &dev_attr_conn_statsn.attr, 3839 &dev_attr_conn_keepalive_tmo.attr, 3840 &dev_attr_conn_max_segment_size.attr, 3841 &dev_attr_conn_tcp_timestamp_stat.attr, 3842 &dev_attr_conn_tcp_wsf_disable.attr, 3843 &dev_attr_conn_tcp_nagle_disable.attr, 3844 &dev_attr_conn_tcp_timer_scale.attr, 3845 &dev_attr_conn_tcp_timestamp_enable.attr, 3846 &dev_attr_conn_fragment_disable.attr, 3847 &dev_attr_conn_ipv4_tos.attr, 3848 &dev_attr_conn_ipv6_traffic_class.attr, 3849 &dev_attr_conn_ipv6_flow_label.attr, 3850 &dev_attr_conn_is_fw_assigned_ipv6.attr, 3851 &dev_attr_conn_tcp_xmit_wsf.attr, 3852 &dev_attr_conn_tcp_recv_wsf.attr, 3853 &dev_attr_conn_local_ipaddr.attr, 3854 NULL, 3855 }; 3856 3857 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 3858 struct attribute *attr, int i) 3859 { 3860 struct device *cdev = container_of(kobj, struct device, kobj); 3861 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 3862 struct iscsi_transport *t = conn->transport; 3863 int param; 3864 3865 if (attr == &dev_attr_conn_max_recv_dlength.attr) 3866 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 3867 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 3868 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 3869 else if (attr == &dev_attr_conn_header_digest.attr) 3870 param = ISCSI_PARAM_HDRDGST_EN; 3871 else if (attr == &dev_attr_conn_data_digest.attr) 3872 param = ISCSI_PARAM_DATADGST_EN; 3873 else if (attr == &dev_attr_conn_ifmarker.attr) 3874 param = ISCSI_PARAM_IFMARKER_EN; 3875 else if (attr == &dev_attr_conn_ofmarker.attr) 3876 param = ISCSI_PARAM_OFMARKER_EN; 3877 else if (attr == &dev_attr_conn_address.attr) 3878 param = ISCSI_PARAM_CONN_ADDRESS; 3879 else if (attr == &dev_attr_conn_port.attr) 3880 param = ISCSI_PARAM_CONN_PORT; 3881 else if (attr == &dev_attr_conn_exp_statsn.attr) 3882 param = ISCSI_PARAM_EXP_STATSN; 3883 else if (attr == &dev_attr_conn_persistent_address.attr) 3884 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 3885 else if (attr == &dev_attr_conn_persistent_port.attr) 3886 param = ISCSI_PARAM_PERSISTENT_PORT; 3887 else if (attr == &dev_attr_conn_ping_tmo.attr) 3888 param = ISCSI_PARAM_PING_TMO; 3889 else if (attr == &dev_attr_conn_recv_tmo.attr) 3890 param = ISCSI_PARAM_RECV_TMO; 3891 else if (attr == &dev_attr_conn_local_port.attr) 3892 param = ISCSI_PARAM_LOCAL_PORT; 3893 else if (attr == &dev_attr_conn_statsn.attr) 3894 param = ISCSI_PARAM_STATSN; 3895 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 3896 param = ISCSI_PARAM_KEEPALIVE_TMO; 3897 else if (attr == &dev_attr_conn_max_segment_size.attr) 3898 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 3899 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 3900 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 3901 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 3902 param = ISCSI_PARAM_TCP_WSF_DISABLE; 3903 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 3904 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 3905 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 3906 param = ISCSI_PARAM_TCP_TIMER_SCALE; 3907 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 3908 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 3909 else if (attr == &dev_attr_conn_fragment_disable.attr) 3910 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 3911 else if (attr == &dev_attr_conn_ipv4_tos.attr) 3912 param = ISCSI_PARAM_IPV4_TOS; 3913 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 3914 param = ISCSI_PARAM_IPV6_TC; 3915 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 3916 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 3917 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 3918 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 3919 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 3920 param = ISCSI_PARAM_TCP_XMIT_WSF; 3921 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 3922 param = ISCSI_PARAM_TCP_RECV_WSF; 3923 else if (attr == &dev_attr_conn_local_ipaddr.attr) 3924 param = ISCSI_PARAM_LOCAL_IPADDR; 3925 else { 3926 WARN_ONCE(1, "Invalid conn attr"); 3927 return 0; 3928 } 3929 3930 return t->attr_is_visible(ISCSI_PARAM, param); 3931 } 3932 3933 static struct attribute_group iscsi_conn_group = { 3934 .attrs = iscsi_conn_attrs, 3935 .is_visible = iscsi_conn_attr_is_visible, 3936 }; 3937 3938 /* 3939 * iSCSI session attrs 3940 */ 3941 #define iscsi_session_attr_show(param, perm) \ 3942 static ssize_t \ 3943 show_session_param_##param(struct device *dev, \ 3944 struct device_attribute *attr, char *buf) \ 3945 { \ 3946 struct iscsi_cls_session *session = \ 3947 iscsi_dev_to_session(dev->parent); \ 3948 struct iscsi_transport *t = session->transport; \ 3949 \ 3950 if (perm && !capable(CAP_SYS_ADMIN)) \ 3951 return -EACCES; \ 3952 return t->get_session_param(session, param, buf); \ 3953 } 3954 3955 #define iscsi_session_attr(field, param, perm) \ 3956 iscsi_session_attr_show(param, perm) \ 3957 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 3958 NULL); 3959 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 3960 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 3961 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 3962 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 3963 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 3964 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 3965 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 3966 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 3967 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 3968 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 3969 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 3970 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 3971 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 3972 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 3973 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 3974 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 3975 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 3976 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 3977 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 3978 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 3979 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 3980 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 3981 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 3982 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 3983 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 3984 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 3985 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 3986 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 3987 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 3988 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 3989 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 3990 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 3991 iscsi_session_attr(discovery_auth_optional, 3992 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 3993 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 3994 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 3995 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 3996 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 3997 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 3998 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 3999 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4000 4001 static ssize_t 4002 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4003 char *buf) 4004 { 4005 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4006 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); 4007 } 4008 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4009 NULL); 4010 static ssize_t 4011 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4012 char *buf) 4013 { 4014 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4015 return sprintf(buf, "%d\n", session->creator); 4016 } 4017 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4018 NULL); 4019 static ssize_t 4020 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4021 char *buf) 4022 { 4023 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4024 return sprintf(buf, "%d\n", session->target_id); 4025 } 4026 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4027 show_priv_session_target_id, NULL); 4028 4029 #define iscsi_priv_session_attr_show(field, format) \ 4030 static ssize_t \ 4031 show_priv_session_##field(struct device *dev, \ 4032 struct device_attribute *attr, char *buf) \ 4033 { \ 4034 struct iscsi_cls_session *session = \ 4035 iscsi_dev_to_session(dev->parent); \ 4036 if (session->field == -1) \ 4037 return sprintf(buf, "off\n"); \ 4038 return sprintf(buf, format"\n", session->field); \ 4039 } 4040 4041 #define iscsi_priv_session_attr_store(field) \ 4042 static ssize_t \ 4043 store_priv_session_##field(struct device *dev, \ 4044 struct device_attribute *attr, \ 4045 const char *buf, size_t count) \ 4046 { \ 4047 int val; \ 4048 char *cp; \ 4049 struct iscsi_cls_session *session = \ 4050 iscsi_dev_to_session(dev->parent); \ 4051 if ((session->state == ISCSI_SESSION_FREE) || \ 4052 (session->state == ISCSI_SESSION_FAILED)) \ 4053 return -EBUSY; \ 4054 if (strncmp(buf, "off", 3) == 0) { \ 4055 session->field = -1; \ 4056 session->field##_sysfs_override = true; \ 4057 } else { \ 4058 val = simple_strtoul(buf, &cp, 0); \ 4059 if (*cp != '\0' && *cp != '\n') \ 4060 return -EINVAL; \ 4061 session->field = val; \ 4062 session->field##_sysfs_override = true; \ 4063 } \ 4064 return count; \ 4065 } 4066 4067 #define iscsi_priv_session_rw_attr(field, format) \ 4068 iscsi_priv_session_attr_show(field, format) \ 4069 iscsi_priv_session_attr_store(field) \ 4070 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4071 show_priv_session_##field, \ 4072 store_priv_session_##field) 4073 4074 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4075 4076 static struct attribute *iscsi_session_attrs[] = { 4077 &dev_attr_sess_initial_r2t.attr, 4078 &dev_attr_sess_max_outstanding_r2t.attr, 4079 &dev_attr_sess_immediate_data.attr, 4080 &dev_attr_sess_first_burst_len.attr, 4081 &dev_attr_sess_max_burst_len.attr, 4082 &dev_attr_sess_data_pdu_in_order.attr, 4083 &dev_attr_sess_data_seq_in_order.attr, 4084 &dev_attr_sess_erl.attr, 4085 &dev_attr_sess_targetname.attr, 4086 &dev_attr_sess_tpgt.attr, 4087 &dev_attr_sess_password.attr, 4088 &dev_attr_sess_password_in.attr, 4089 &dev_attr_sess_username.attr, 4090 &dev_attr_sess_username_in.attr, 4091 &dev_attr_sess_fast_abort.attr, 4092 &dev_attr_sess_abort_tmo.attr, 4093 &dev_attr_sess_lu_reset_tmo.attr, 4094 &dev_attr_sess_tgt_reset_tmo.attr, 4095 &dev_attr_sess_ifacename.attr, 4096 &dev_attr_sess_initiatorname.attr, 4097 &dev_attr_sess_targetalias.attr, 4098 &dev_attr_sess_boot_root.attr, 4099 &dev_attr_sess_boot_nic.attr, 4100 &dev_attr_sess_boot_target.attr, 4101 &dev_attr_priv_sess_recovery_tmo.attr, 4102 &dev_attr_priv_sess_state.attr, 4103 &dev_attr_priv_sess_creator.attr, 4104 &dev_attr_sess_chap_out_idx.attr, 4105 &dev_attr_sess_chap_in_idx.attr, 4106 &dev_attr_priv_sess_target_id.attr, 4107 &dev_attr_sess_auto_snd_tgt_disable.attr, 4108 &dev_attr_sess_discovery_session.attr, 4109 &dev_attr_sess_portal_type.attr, 4110 &dev_attr_sess_chap_auth.attr, 4111 &dev_attr_sess_discovery_logout.attr, 4112 &dev_attr_sess_bidi_chap.attr, 4113 &dev_attr_sess_discovery_auth_optional.attr, 4114 &dev_attr_sess_def_time2wait.attr, 4115 &dev_attr_sess_def_time2retain.attr, 4116 &dev_attr_sess_isid.attr, 4117 &dev_attr_sess_tsid.attr, 4118 &dev_attr_sess_def_taskmgmt_tmo.attr, 4119 &dev_attr_sess_discovery_parent_idx.attr, 4120 &dev_attr_sess_discovery_parent_type.attr, 4121 NULL, 4122 }; 4123 4124 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4125 struct attribute *attr, int i) 4126 { 4127 struct device *cdev = container_of(kobj, struct device, kobj); 4128 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4129 struct iscsi_transport *t = session->transport; 4130 int param; 4131 4132 if (attr == &dev_attr_sess_initial_r2t.attr) 4133 param = ISCSI_PARAM_INITIAL_R2T_EN; 4134 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4135 param = ISCSI_PARAM_MAX_R2T; 4136 else if (attr == &dev_attr_sess_immediate_data.attr) 4137 param = ISCSI_PARAM_IMM_DATA_EN; 4138 else if (attr == &dev_attr_sess_first_burst_len.attr) 4139 param = ISCSI_PARAM_FIRST_BURST; 4140 else if (attr == &dev_attr_sess_max_burst_len.attr) 4141 param = ISCSI_PARAM_MAX_BURST; 4142 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4143 param = ISCSI_PARAM_PDU_INORDER_EN; 4144 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4145 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4146 else if (attr == &dev_attr_sess_erl.attr) 4147 param = ISCSI_PARAM_ERL; 4148 else if (attr == &dev_attr_sess_targetname.attr) 4149 param = ISCSI_PARAM_TARGET_NAME; 4150 else if (attr == &dev_attr_sess_tpgt.attr) 4151 param = ISCSI_PARAM_TPGT; 4152 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4153 param = ISCSI_PARAM_CHAP_IN_IDX; 4154 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4155 param = ISCSI_PARAM_CHAP_OUT_IDX; 4156 else if (attr == &dev_attr_sess_password.attr) 4157 param = ISCSI_PARAM_USERNAME; 4158 else if (attr == &dev_attr_sess_password_in.attr) 4159 param = ISCSI_PARAM_USERNAME_IN; 4160 else if (attr == &dev_attr_sess_username.attr) 4161 param = ISCSI_PARAM_PASSWORD; 4162 else if (attr == &dev_attr_sess_username_in.attr) 4163 param = ISCSI_PARAM_PASSWORD_IN; 4164 else if (attr == &dev_attr_sess_fast_abort.attr) 4165 param = ISCSI_PARAM_FAST_ABORT; 4166 else if (attr == &dev_attr_sess_abort_tmo.attr) 4167 param = ISCSI_PARAM_ABORT_TMO; 4168 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4169 param = ISCSI_PARAM_LU_RESET_TMO; 4170 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4171 param = ISCSI_PARAM_TGT_RESET_TMO; 4172 else if (attr == &dev_attr_sess_ifacename.attr) 4173 param = ISCSI_PARAM_IFACE_NAME; 4174 else if (attr == &dev_attr_sess_initiatorname.attr) 4175 param = ISCSI_PARAM_INITIATOR_NAME; 4176 else if (attr == &dev_attr_sess_targetalias.attr) 4177 param = ISCSI_PARAM_TARGET_ALIAS; 4178 else if (attr == &dev_attr_sess_boot_root.attr) 4179 param = ISCSI_PARAM_BOOT_ROOT; 4180 else if (attr == &dev_attr_sess_boot_nic.attr) 4181 param = ISCSI_PARAM_BOOT_NIC; 4182 else if (attr == &dev_attr_sess_boot_target.attr) 4183 param = ISCSI_PARAM_BOOT_TARGET; 4184 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4185 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4186 else if (attr == &dev_attr_sess_discovery_session.attr) 4187 param = ISCSI_PARAM_DISCOVERY_SESS; 4188 else if (attr == &dev_attr_sess_portal_type.attr) 4189 param = ISCSI_PARAM_PORTAL_TYPE; 4190 else if (attr == &dev_attr_sess_chap_auth.attr) 4191 param = ISCSI_PARAM_CHAP_AUTH_EN; 4192 else if (attr == &dev_attr_sess_discovery_logout.attr) 4193 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4194 else if (attr == &dev_attr_sess_bidi_chap.attr) 4195 param = ISCSI_PARAM_BIDI_CHAP_EN; 4196 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4197 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4198 else if (attr == &dev_attr_sess_def_time2wait.attr) 4199 param = ISCSI_PARAM_DEF_TIME2WAIT; 4200 else if (attr == &dev_attr_sess_def_time2retain.attr) 4201 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4202 else if (attr == &dev_attr_sess_isid.attr) 4203 param = ISCSI_PARAM_ISID; 4204 else if (attr == &dev_attr_sess_tsid.attr) 4205 param = ISCSI_PARAM_TSID; 4206 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4207 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4208 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4209 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4210 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4211 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4212 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4213 return S_IRUGO | S_IWUSR; 4214 else if (attr == &dev_attr_priv_sess_state.attr) 4215 return S_IRUGO; 4216 else if (attr == &dev_attr_priv_sess_creator.attr) 4217 return S_IRUGO; 4218 else if (attr == &dev_attr_priv_sess_target_id.attr) 4219 return S_IRUGO; 4220 else { 4221 WARN_ONCE(1, "Invalid session attr"); 4222 return 0; 4223 } 4224 4225 return t->attr_is_visible(ISCSI_PARAM, param); 4226 } 4227 4228 static struct attribute_group iscsi_session_group = { 4229 .attrs = iscsi_session_attrs, 4230 .is_visible = iscsi_session_attr_is_visible, 4231 }; 4232 4233 /* 4234 * iSCSI host attrs 4235 */ 4236 #define iscsi_host_attr_show(param) \ 4237 static ssize_t \ 4238 show_host_param_##param(struct device *dev, \ 4239 struct device_attribute *attr, char *buf) \ 4240 { \ 4241 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4242 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4243 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4244 } 4245 4246 #define iscsi_host_attr(field, param) \ 4247 iscsi_host_attr_show(param) \ 4248 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4249 NULL); 4250 4251 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4252 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4253 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4254 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4255 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4256 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4257 4258 static struct attribute *iscsi_host_attrs[] = { 4259 &dev_attr_host_netdev.attr, 4260 &dev_attr_host_hwaddress.attr, 4261 &dev_attr_host_ipaddress.attr, 4262 &dev_attr_host_initiatorname.attr, 4263 &dev_attr_host_port_state.attr, 4264 &dev_attr_host_port_speed.attr, 4265 NULL, 4266 }; 4267 4268 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4269 struct attribute *attr, int i) 4270 { 4271 struct device *cdev = container_of(kobj, struct device, kobj); 4272 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4273 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4274 int param; 4275 4276 if (attr == &dev_attr_host_netdev.attr) 4277 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4278 else if (attr == &dev_attr_host_hwaddress.attr) 4279 param = ISCSI_HOST_PARAM_HWADDRESS; 4280 else if (attr == &dev_attr_host_ipaddress.attr) 4281 param = ISCSI_HOST_PARAM_IPADDRESS; 4282 else if (attr == &dev_attr_host_initiatorname.attr) 4283 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4284 else if (attr == &dev_attr_host_port_state.attr) 4285 param = ISCSI_HOST_PARAM_PORT_STATE; 4286 else if (attr == &dev_attr_host_port_speed.attr) 4287 param = ISCSI_HOST_PARAM_PORT_SPEED; 4288 else { 4289 WARN_ONCE(1, "Invalid host attr"); 4290 return 0; 4291 } 4292 4293 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4294 } 4295 4296 static struct attribute_group iscsi_host_group = { 4297 .attrs = iscsi_host_attrs, 4298 .is_visible = iscsi_host_attr_is_visible, 4299 }; 4300 4301 /* convert iscsi_port_speed values to ascii string name */ 4302 static const struct { 4303 enum iscsi_port_speed value; 4304 char *name; 4305 } iscsi_port_speed_names[] = { 4306 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4307 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4308 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4309 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4310 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4311 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4312 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4313 }; 4314 4315 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4316 { 4317 int i; 4318 char *speed = "Unknown!"; 4319 struct iscsi_cls_host *ihost = shost->shost_data; 4320 uint32_t port_speed = ihost->port_speed; 4321 4322 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4323 if (iscsi_port_speed_names[i].value & port_speed) { 4324 speed = iscsi_port_speed_names[i].name; 4325 break; 4326 } 4327 } 4328 return speed; 4329 } 4330 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4331 4332 /* convert iscsi_port_state values to ascii string name */ 4333 static const struct { 4334 enum iscsi_port_state value; 4335 char *name; 4336 } iscsi_port_state_names[] = { 4337 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4338 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4339 }; 4340 4341 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4342 { 4343 int i; 4344 char *state = "Unknown!"; 4345 struct iscsi_cls_host *ihost = shost->shost_data; 4346 uint32_t port_state = ihost->port_state; 4347 4348 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4349 if (iscsi_port_state_names[i].value & port_state) { 4350 state = iscsi_port_state_names[i].name; 4351 break; 4352 } 4353 } 4354 return state; 4355 } 4356 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4357 4358 static int iscsi_session_match(struct attribute_container *cont, 4359 struct device *dev) 4360 { 4361 struct iscsi_cls_session *session; 4362 struct Scsi_Host *shost; 4363 struct iscsi_internal *priv; 4364 4365 if (!iscsi_is_session_dev(dev)) 4366 return 0; 4367 4368 session = iscsi_dev_to_session(dev); 4369 shost = iscsi_session_to_shost(session); 4370 if (!shost->transportt) 4371 return 0; 4372 4373 priv = to_iscsi_internal(shost->transportt); 4374 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4375 return 0; 4376 4377 return &priv->session_cont.ac == cont; 4378 } 4379 4380 static int iscsi_conn_match(struct attribute_container *cont, 4381 struct device *dev) 4382 { 4383 struct iscsi_cls_session *session; 4384 struct iscsi_cls_conn *conn; 4385 struct Scsi_Host *shost; 4386 struct iscsi_internal *priv; 4387 4388 if (!iscsi_is_conn_dev(dev)) 4389 return 0; 4390 4391 conn = iscsi_dev_to_conn(dev); 4392 session = iscsi_dev_to_session(conn->dev.parent); 4393 shost = iscsi_session_to_shost(session); 4394 4395 if (!shost->transportt) 4396 return 0; 4397 4398 priv = to_iscsi_internal(shost->transportt); 4399 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4400 return 0; 4401 4402 return &priv->conn_cont.ac == cont; 4403 } 4404 4405 static int iscsi_host_match(struct attribute_container *cont, 4406 struct device *dev) 4407 { 4408 struct Scsi_Host *shost; 4409 struct iscsi_internal *priv; 4410 4411 if (!scsi_is_host_device(dev)) 4412 return 0; 4413 4414 shost = dev_to_shost(dev); 4415 if (!shost->transportt || 4416 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4417 return 0; 4418 4419 priv = to_iscsi_internal(shost->transportt); 4420 return &priv->t.host_attrs.ac == cont; 4421 } 4422 4423 struct scsi_transport_template * 4424 iscsi_register_transport(struct iscsi_transport *tt) 4425 { 4426 struct iscsi_internal *priv; 4427 unsigned long flags; 4428 int err; 4429 4430 BUG_ON(!tt); 4431 4432 priv = iscsi_if_transport_lookup(tt); 4433 if (priv) 4434 return NULL; 4435 4436 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4437 if (!priv) 4438 return NULL; 4439 INIT_LIST_HEAD(&priv->list); 4440 priv->iscsi_transport = tt; 4441 priv->t.user_scan = iscsi_user_scan; 4442 priv->t.create_work_queue = 1; 4443 4444 priv->dev.class = &iscsi_transport_class; 4445 dev_set_name(&priv->dev, "%s", tt->name); 4446 err = device_register(&priv->dev); 4447 if (err) 4448 goto free_priv; 4449 4450 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4451 if (err) 4452 goto unregister_dev; 4453 4454 /* host parameters */ 4455 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4456 priv->t.host_attrs.ac.match = iscsi_host_match; 4457 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4458 priv->t.host_size = sizeof(struct iscsi_cls_host); 4459 transport_container_register(&priv->t.host_attrs); 4460 4461 /* connection parameters */ 4462 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4463 priv->conn_cont.ac.match = iscsi_conn_match; 4464 priv->conn_cont.ac.grp = &iscsi_conn_group; 4465 transport_container_register(&priv->conn_cont); 4466 4467 /* session parameters */ 4468 priv->session_cont.ac.class = &iscsi_session_class.class; 4469 priv->session_cont.ac.match = iscsi_session_match; 4470 priv->session_cont.ac.grp = &iscsi_session_group; 4471 transport_container_register(&priv->session_cont); 4472 4473 spin_lock_irqsave(&iscsi_transport_lock, flags); 4474 list_add(&priv->list, &iscsi_transports); 4475 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4476 4477 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4478 return &priv->t; 4479 4480 unregister_dev: 4481 device_unregister(&priv->dev); 4482 return NULL; 4483 free_priv: 4484 kfree(priv); 4485 return NULL; 4486 } 4487 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4488 4489 int iscsi_unregister_transport(struct iscsi_transport *tt) 4490 { 4491 struct iscsi_internal *priv; 4492 unsigned long flags; 4493 4494 BUG_ON(!tt); 4495 4496 mutex_lock(&rx_queue_mutex); 4497 4498 priv = iscsi_if_transport_lookup(tt); 4499 BUG_ON (!priv); 4500 4501 spin_lock_irqsave(&iscsi_transport_lock, flags); 4502 list_del(&priv->list); 4503 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4504 4505 transport_container_unregister(&priv->conn_cont); 4506 transport_container_unregister(&priv->session_cont); 4507 transport_container_unregister(&priv->t.host_attrs); 4508 4509 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4510 device_unregister(&priv->dev); 4511 mutex_unlock(&rx_queue_mutex); 4512 4513 return 0; 4514 } 4515 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4516 4517 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4518 struct device *dev, const char *fmt, ...) 4519 { 4520 struct va_format vaf; 4521 va_list args; 4522 4523 va_start(args, fmt); 4524 vaf.fmt = fmt; 4525 vaf.va = &args; 4526 trace(dev, &vaf); 4527 va_end(args); 4528 } 4529 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4530 4531 static __init int iscsi_transport_init(void) 4532 { 4533 int err; 4534 struct netlink_kernel_cfg cfg = { 4535 .groups = 1, 4536 .input = iscsi_if_rx, 4537 }; 4538 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4539 ISCSI_TRANSPORT_VERSION); 4540 4541 atomic_set(&iscsi_session_nr, 0); 4542 4543 err = class_register(&iscsi_transport_class); 4544 if (err) 4545 return err; 4546 4547 err = class_register(&iscsi_endpoint_class); 4548 if (err) 4549 goto unregister_transport_class; 4550 4551 err = class_register(&iscsi_iface_class); 4552 if (err) 4553 goto unregister_endpoint_class; 4554 4555 err = transport_class_register(&iscsi_host_class); 4556 if (err) 4557 goto unregister_iface_class; 4558 4559 err = transport_class_register(&iscsi_connection_class); 4560 if (err) 4561 goto unregister_host_class; 4562 4563 err = transport_class_register(&iscsi_session_class); 4564 if (err) 4565 goto unregister_conn_class; 4566 4567 err = bus_register(&iscsi_flashnode_bus); 4568 if (err) 4569 goto unregister_session_class; 4570 4571 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4572 if (!nls) { 4573 err = -ENOBUFS; 4574 goto unregister_flashnode_bus; 4575 } 4576 4577 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); 4578 if (!iscsi_eh_timer_workq) { 4579 err = -ENOMEM; 4580 goto release_nls; 4581 } 4582 4583 return 0; 4584 4585 release_nls: 4586 netlink_kernel_release(nls); 4587 unregister_flashnode_bus: 4588 bus_unregister(&iscsi_flashnode_bus); 4589 unregister_session_class: 4590 transport_class_unregister(&iscsi_session_class); 4591 unregister_conn_class: 4592 transport_class_unregister(&iscsi_connection_class); 4593 unregister_host_class: 4594 transport_class_unregister(&iscsi_host_class); 4595 unregister_iface_class: 4596 class_unregister(&iscsi_iface_class); 4597 unregister_endpoint_class: 4598 class_unregister(&iscsi_endpoint_class); 4599 unregister_transport_class: 4600 class_unregister(&iscsi_transport_class); 4601 return err; 4602 } 4603 4604 static void __exit iscsi_transport_exit(void) 4605 { 4606 destroy_workqueue(iscsi_eh_timer_workq); 4607 netlink_kernel_release(nls); 4608 bus_unregister(&iscsi_flashnode_bus); 4609 transport_class_unregister(&iscsi_connection_class); 4610 transport_class_unregister(&iscsi_session_class); 4611 transport_class_unregister(&iscsi_host_class); 4612 class_unregister(&iscsi_endpoint_class); 4613 class_unregister(&iscsi_iface_class); 4614 class_unregister(&iscsi_transport_class); 4615 } 4616 4617 module_init(iscsi_transport_init); 4618 module_exit(iscsi_transport_exit); 4619 4620 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4621 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4622 "Alex Aizman <itn780@yahoo.com>"); 4623 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4624 MODULE_LICENSE("GPL"); 4625 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4626 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4627