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 __iscsi_unbind_session(&session->unbind_work); 2204 2205 /* hw iscsi may not have removed all connections from session */ 2206 err = device_for_each_child(&session->dev, NULL, 2207 iscsi_iter_destroy_conn_fn); 2208 if (err) 2209 iscsi_cls_session_printk(KERN_ERR, session, 2210 "Could not delete all connections " 2211 "for session. Error %d.\n", err); 2212 2213 transport_unregister_device(&session->dev); 2214 2215 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2216 device_del(&session->dev); 2217 } 2218 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2219 2220 void iscsi_free_session(struct iscsi_cls_session *session) 2221 { 2222 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2223 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2224 put_device(&session->dev); 2225 } 2226 EXPORT_SYMBOL_GPL(iscsi_free_session); 2227 2228 /** 2229 * iscsi_create_conn - create iscsi class connection 2230 * @session: iscsi cls session 2231 * @dd_size: private driver data size 2232 * @cid: connection id 2233 * 2234 * This can be called from a LLD or iscsi_transport. The connection 2235 * is child of the session so cid must be unique for all connections 2236 * on the session. 2237 * 2238 * Since we do not support MCS, cid will normally be zero. In some cases 2239 * for software iscsi we could be trying to preallocate a connection struct 2240 * in which case there could be two connection structs and cid would be 2241 * non-zero. 2242 */ 2243 struct iscsi_cls_conn * 2244 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2245 { 2246 struct iscsi_transport *transport = session->transport; 2247 struct iscsi_cls_conn *conn; 2248 unsigned long flags; 2249 int err; 2250 2251 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2252 if (!conn) 2253 return NULL; 2254 if (dd_size) 2255 conn->dd_data = &conn[1]; 2256 2257 mutex_init(&conn->ep_mutex); 2258 INIT_LIST_HEAD(&conn->conn_list); 2259 conn->transport = transport; 2260 conn->cid = cid; 2261 2262 /* this is released in the dev's release function */ 2263 if (!get_device(&session->dev)) 2264 goto free_conn; 2265 2266 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2267 conn->dev.parent = &session->dev; 2268 conn->dev.release = iscsi_conn_release; 2269 err = device_register(&conn->dev); 2270 if (err) { 2271 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2272 "register connection's dev\n"); 2273 goto release_parent_ref; 2274 } 2275 transport_register_device(&conn->dev); 2276 2277 spin_lock_irqsave(&connlock, flags); 2278 list_add(&conn->conn_list, &connlist); 2279 spin_unlock_irqrestore(&connlock, flags); 2280 2281 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); 2282 return conn; 2283 2284 release_parent_ref: 2285 put_device(&session->dev); 2286 free_conn: 2287 kfree(conn); 2288 return NULL; 2289 } 2290 2291 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2292 2293 /** 2294 * iscsi_destroy_conn - destroy iscsi class connection 2295 * @conn: iscsi cls session 2296 * 2297 * This can be called from a LLD or iscsi_transport. 2298 */ 2299 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2300 { 2301 unsigned long flags; 2302 2303 spin_lock_irqsave(&connlock, flags); 2304 list_del(&conn->conn_list); 2305 spin_unlock_irqrestore(&connlock, flags); 2306 2307 transport_unregister_device(&conn->dev); 2308 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2309 device_unregister(&conn->dev); 2310 return 0; 2311 } 2312 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2313 2314 /* 2315 * iscsi interface functions 2316 */ 2317 static struct iscsi_internal * 2318 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2319 { 2320 struct iscsi_internal *priv; 2321 unsigned long flags; 2322 2323 spin_lock_irqsave(&iscsi_transport_lock, flags); 2324 list_for_each_entry(priv, &iscsi_transports, list) { 2325 if (tt == priv->iscsi_transport) { 2326 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2327 return priv; 2328 } 2329 } 2330 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2331 return NULL; 2332 } 2333 2334 static int 2335 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2336 { 2337 return nlmsg_multicast(nls, skb, 0, group, gfp); 2338 } 2339 2340 static int 2341 iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2342 { 2343 return nlmsg_unicast(nls, skb, portid); 2344 } 2345 2346 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2347 char *data, uint32_t data_size) 2348 { 2349 struct nlmsghdr *nlh; 2350 struct sk_buff *skb; 2351 struct iscsi_uevent *ev; 2352 char *pdu; 2353 struct iscsi_internal *priv; 2354 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2355 data_size); 2356 2357 priv = iscsi_if_transport_lookup(conn->transport); 2358 if (!priv) 2359 return -EINVAL; 2360 2361 skb = alloc_skb(len, GFP_ATOMIC); 2362 if (!skb) { 2363 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2364 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2365 "control PDU: OOM\n"); 2366 return -ENOMEM; 2367 } 2368 2369 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2370 ev = nlmsg_data(nlh); 2371 memset(ev, 0, sizeof(*ev)); 2372 ev->transport_handle = iscsi_handle(conn->transport); 2373 ev->type = ISCSI_KEVENT_RECV_PDU; 2374 ev->r.recv_req.cid = conn->cid; 2375 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2376 pdu = (char*)ev + sizeof(*ev); 2377 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2378 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2379 2380 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2381 } 2382 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2383 2384 int iscsi_offload_mesg(struct Scsi_Host *shost, 2385 struct iscsi_transport *transport, uint32_t type, 2386 char *data, uint16_t data_size) 2387 { 2388 struct nlmsghdr *nlh; 2389 struct sk_buff *skb; 2390 struct iscsi_uevent *ev; 2391 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2392 2393 skb = alloc_skb(len, GFP_ATOMIC); 2394 if (!skb) { 2395 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2396 return -ENOMEM; 2397 } 2398 2399 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2400 ev = nlmsg_data(nlh); 2401 memset(ev, 0, sizeof(*ev)); 2402 ev->type = type; 2403 ev->transport_handle = iscsi_handle(transport); 2404 switch (type) { 2405 case ISCSI_KEVENT_PATH_REQ: 2406 ev->r.req_path.host_no = shost->host_no; 2407 break; 2408 case ISCSI_KEVENT_IF_DOWN: 2409 ev->r.notify_if_down.host_no = shost->host_no; 2410 break; 2411 } 2412 2413 memcpy((char *)ev + sizeof(*ev), data, data_size); 2414 2415 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2416 } 2417 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2418 2419 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2420 { 2421 struct nlmsghdr *nlh; 2422 struct sk_buff *skb; 2423 struct iscsi_uevent *ev; 2424 struct iscsi_internal *priv; 2425 int len = nlmsg_total_size(sizeof(*ev)); 2426 2427 priv = iscsi_if_transport_lookup(conn->transport); 2428 if (!priv) 2429 return; 2430 2431 skb = alloc_skb(len, GFP_ATOMIC); 2432 if (!skb) { 2433 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2434 "conn error (%d)\n", error); 2435 return; 2436 } 2437 2438 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2439 ev = nlmsg_data(nlh); 2440 ev->transport_handle = iscsi_handle(conn->transport); 2441 ev->type = ISCSI_KEVENT_CONN_ERROR; 2442 ev->r.connerror.error = error; 2443 ev->r.connerror.cid = conn->cid; 2444 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2445 2446 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2447 2448 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2449 error); 2450 } 2451 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2452 2453 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2454 enum iscsi_conn_state state) 2455 { 2456 struct nlmsghdr *nlh; 2457 struct sk_buff *skb; 2458 struct iscsi_uevent *ev; 2459 struct iscsi_internal *priv; 2460 int len = nlmsg_total_size(sizeof(*ev)); 2461 2462 priv = iscsi_if_transport_lookup(conn->transport); 2463 if (!priv) 2464 return; 2465 2466 skb = alloc_skb(len, GFP_ATOMIC); 2467 if (!skb) { 2468 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2469 "conn login (%d)\n", state); 2470 return; 2471 } 2472 2473 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2474 ev = nlmsg_data(nlh); 2475 ev->transport_handle = iscsi_handle(conn->transport); 2476 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2477 ev->r.conn_login.state = state; 2478 ev->r.conn_login.cid = conn->cid; 2479 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2480 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2481 2482 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2483 state); 2484 } 2485 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2486 2487 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2488 enum iscsi_host_event_code code, uint32_t data_size, 2489 uint8_t *data) 2490 { 2491 struct nlmsghdr *nlh; 2492 struct sk_buff *skb; 2493 struct iscsi_uevent *ev; 2494 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2495 2496 skb = alloc_skb(len, GFP_NOIO); 2497 if (!skb) { 2498 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2499 host_no, code); 2500 return; 2501 } 2502 2503 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2504 ev = nlmsg_data(nlh); 2505 ev->transport_handle = iscsi_handle(transport); 2506 ev->type = ISCSI_KEVENT_HOST_EVENT; 2507 ev->r.host_event.host_no = host_no; 2508 ev->r.host_event.code = code; 2509 ev->r.host_event.data_size = data_size; 2510 2511 if (data_size) 2512 memcpy((char *)ev + sizeof(*ev), data, data_size); 2513 2514 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2515 } 2516 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2517 2518 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2519 uint32_t status, uint32_t pid, uint32_t data_size, 2520 uint8_t *data) 2521 { 2522 struct nlmsghdr *nlh; 2523 struct sk_buff *skb; 2524 struct iscsi_uevent *ev; 2525 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2526 2527 skb = alloc_skb(len, GFP_NOIO); 2528 if (!skb) { 2529 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2530 return; 2531 } 2532 2533 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2534 ev = nlmsg_data(nlh); 2535 ev->transport_handle = iscsi_handle(transport); 2536 ev->type = ISCSI_KEVENT_PING_COMP; 2537 ev->r.ping_comp.host_no = host_no; 2538 ev->r.ping_comp.status = status; 2539 ev->r.ping_comp.pid = pid; 2540 ev->r.ping_comp.data_size = data_size; 2541 memcpy((char *)ev + sizeof(*ev), data, data_size); 2542 2543 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2544 } 2545 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2546 2547 static int 2548 iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2549 { 2550 struct sk_buff *skb; 2551 struct nlmsghdr *nlh; 2552 int len = nlmsg_total_size(size); 2553 2554 skb = alloc_skb(len, GFP_ATOMIC); 2555 if (!skb) { 2556 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2557 return -ENOMEM; 2558 } 2559 2560 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2561 memcpy(nlmsg_data(nlh), payload, size); 2562 return iscsi_unicast_skb(skb, portid); 2563 } 2564 2565 static int 2566 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2567 { 2568 struct iscsi_uevent *ev = nlmsg_data(nlh); 2569 struct iscsi_stats *stats; 2570 struct sk_buff *skbstat; 2571 struct iscsi_cls_conn *conn; 2572 struct nlmsghdr *nlhstat; 2573 struct iscsi_uevent *evstat; 2574 struct iscsi_internal *priv; 2575 int len = nlmsg_total_size(sizeof(*ev) + 2576 sizeof(struct iscsi_stats) + 2577 sizeof(struct iscsi_stats_custom) * 2578 ISCSI_STATS_CUSTOM_MAX); 2579 int err = 0; 2580 2581 priv = iscsi_if_transport_lookup(transport); 2582 if (!priv) 2583 return -EINVAL; 2584 2585 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2586 if (!conn) 2587 return -EEXIST; 2588 2589 do { 2590 int actual_size; 2591 2592 skbstat = alloc_skb(len, GFP_ATOMIC); 2593 if (!skbstat) { 2594 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2595 "deliver stats: OOM\n"); 2596 return -ENOMEM; 2597 } 2598 2599 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2600 (len - sizeof(*nlhstat)), 0); 2601 evstat = nlmsg_data(nlhstat); 2602 memset(evstat, 0, sizeof(*evstat)); 2603 evstat->transport_handle = iscsi_handle(conn->transport); 2604 evstat->type = nlh->nlmsg_type; 2605 evstat->u.get_stats.cid = 2606 ev->u.get_stats.cid; 2607 evstat->u.get_stats.sid = 2608 ev->u.get_stats.sid; 2609 stats = (struct iscsi_stats *) 2610 ((char*)evstat + sizeof(*evstat)); 2611 memset(stats, 0, sizeof(*stats)); 2612 2613 transport->get_stats(conn, stats); 2614 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2615 sizeof(struct iscsi_stats) + 2616 sizeof(struct iscsi_stats_custom) * 2617 stats->custom_length); 2618 actual_size -= sizeof(*nlhstat); 2619 actual_size = nlmsg_msg_size(actual_size); 2620 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2621 nlhstat->nlmsg_len = actual_size; 2622 2623 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2624 GFP_ATOMIC); 2625 } while (err < 0 && err != -ECONNREFUSED); 2626 2627 return err; 2628 } 2629 2630 /** 2631 * iscsi_session_event - send session destr. completion event 2632 * @session: iscsi class session 2633 * @event: type of event 2634 */ 2635 int iscsi_session_event(struct iscsi_cls_session *session, 2636 enum iscsi_uevent_e event) 2637 { 2638 struct iscsi_internal *priv; 2639 struct Scsi_Host *shost; 2640 struct iscsi_uevent *ev; 2641 struct sk_buff *skb; 2642 struct nlmsghdr *nlh; 2643 int rc, len = nlmsg_total_size(sizeof(*ev)); 2644 2645 priv = iscsi_if_transport_lookup(session->transport); 2646 if (!priv) 2647 return -EINVAL; 2648 shost = iscsi_session_to_shost(session); 2649 2650 skb = alloc_skb(len, GFP_KERNEL); 2651 if (!skb) { 2652 iscsi_cls_session_printk(KERN_ERR, session, 2653 "Cannot notify userspace of session " 2654 "event %u\n", event); 2655 return -ENOMEM; 2656 } 2657 2658 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2659 ev = nlmsg_data(nlh); 2660 ev->transport_handle = iscsi_handle(session->transport); 2661 2662 ev->type = event; 2663 switch (event) { 2664 case ISCSI_KEVENT_DESTROY_SESSION: 2665 ev->r.d_session.host_no = shost->host_no; 2666 ev->r.d_session.sid = session->sid; 2667 break; 2668 case ISCSI_KEVENT_CREATE_SESSION: 2669 ev->r.c_session_ret.host_no = shost->host_no; 2670 ev->r.c_session_ret.sid = session->sid; 2671 break; 2672 case ISCSI_KEVENT_UNBIND_SESSION: 2673 ev->r.unbind_session.host_no = shost->host_no; 2674 ev->r.unbind_session.sid = session->sid; 2675 break; 2676 default: 2677 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2678 "%u.\n", event); 2679 kfree_skb(skb); 2680 return -EINVAL; 2681 } 2682 2683 /* 2684 * this will occur if the daemon is not up, so we just warn 2685 * the user and when the daemon is restarted it will handle it 2686 */ 2687 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2688 if (rc == -ESRCH) 2689 iscsi_cls_session_printk(KERN_ERR, session, 2690 "Cannot notify userspace of session " 2691 "event %u. Check iscsi daemon\n", 2692 event); 2693 2694 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2695 event, rc); 2696 return rc; 2697 } 2698 EXPORT_SYMBOL_GPL(iscsi_session_event); 2699 2700 static int 2701 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2702 struct iscsi_uevent *ev, pid_t pid, 2703 uint32_t initial_cmdsn, uint16_t cmds_max, 2704 uint16_t queue_depth) 2705 { 2706 struct iscsi_transport *transport = priv->iscsi_transport; 2707 struct iscsi_cls_session *session; 2708 struct Scsi_Host *shost; 2709 2710 session = transport->create_session(ep, cmds_max, queue_depth, 2711 initial_cmdsn); 2712 if (!session) 2713 return -ENOMEM; 2714 2715 session->creator = pid; 2716 shost = iscsi_session_to_shost(session); 2717 ev->r.c_session_ret.host_no = shost->host_no; 2718 ev->r.c_session_ret.sid = session->sid; 2719 ISCSI_DBG_TRANS_SESSION(session, 2720 "Completed creating transport session\n"); 2721 return 0; 2722 } 2723 2724 static int 2725 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2726 { 2727 struct iscsi_cls_conn *conn; 2728 struct iscsi_cls_session *session; 2729 2730 session = iscsi_session_lookup(ev->u.c_conn.sid); 2731 if (!session) { 2732 printk(KERN_ERR "iscsi: invalid session %d.\n", 2733 ev->u.c_conn.sid); 2734 return -EINVAL; 2735 } 2736 2737 conn = transport->create_conn(session, ev->u.c_conn.cid); 2738 if (!conn) { 2739 iscsi_cls_session_printk(KERN_ERR, session, 2740 "couldn't create a new connection."); 2741 return -ENOMEM; 2742 } 2743 2744 ev->r.c_conn_ret.sid = session->sid; 2745 ev->r.c_conn_ret.cid = conn->cid; 2746 2747 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2748 return 0; 2749 } 2750 2751 static int 2752 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2753 { 2754 struct iscsi_cls_conn *conn; 2755 2756 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2757 if (!conn) 2758 return -EINVAL; 2759 2760 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2761 if (transport->destroy_conn) 2762 transport->destroy_conn(conn); 2763 2764 return 0; 2765 } 2766 2767 static int 2768 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2769 { 2770 char *data = (char*)ev + sizeof(*ev); 2771 struct iscsi_cls_conn *conn; 2772 struct iscsi_cls_session *session; 2773 int err = 0, value = 0; 2774 2775 session = iscsi_session_lookup(ev->u.set_param.sid); 2776 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2777 if (!conn || !session) 2778 return -EINVAL; 2779 2780 switch (ev->u.set_param.param) { 2781 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2782 sscanf(data, "%d", &value); 2783 if (!session->recovery_tmo_sysfs_override) 2784 session->recovery_tmo = value; 2785 break; 2786 default: 2787 err = transport->set_param(conn, ev->u.set_param.param, 2788 data, ev->u.set_param.len); 2789 } 2790 2791 return err; 2792 } 2793 2794 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2795 struct iscsi_uevent *ev, int msg_type) 2796 { 2797 struct iscsi_endpoint *ep; 2798 struct sockaddr *dst_addr; 2799 struct Scsi_Host *shost = NULL; 2800 int non_blocking, err = 0; 2801 2802 if (!transport->ep_connect) 2803 return -EINVAL; 2804 2805 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2806 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2807 if (!shost) { 2808 printk(KERN_ERR "ep connect failed. Could not find " 2809 "host no %u\n", 2810 ev->u.ep_connect_through_host.host_no); 2811 return -ENODEV; 2812 } 2813 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2814 } else 2815 non_blocking = ev->u.ep_connect.non_blocking; 2816 2817 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2818 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2819 if (IS_ERR(ep)) { 2820 err = PTR_ERR(ep); 2821 goto release_host; 2822 } 2823 2824 ev->r.ep_connect_ret.handle = ep->id; 2825 release_host: 2826 if (shost) 2827 scsi_host_put(shost); 2828 return err; 2829 } 2830 2831 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2832 u64 ep_handle) 2833 { 2834 struct iscsi_cls_conn *conn; 2835 struct iscsi_endpoint *ep; 2836 2837 if (!transport->ep_disconnect) 2838 return -EINVAL; 2839 2840 ep = iscsi_lookup_endpoint(ep_handle); 2841 if (!ep) 2842 return -EINVAL; 2843 conn = ep->conn; 2844 if (conn) { 2845 mutex_lock(&conn->ep_mutex); 2846 conn->ep = NULL; 2847 mutex_unlock(&conn->ep_mutex); 2848 } 2849 2850 transport->ep_disconnect(ep); 2851 return 0; 2852 } 2853 2854 static int 2855 iscsi_if_transport_ep(struct iscsi_transport *transport, 2856 struct iscsi_uevent *ev, int msg_type) 2857 { 2858 struct iscsi_endpoint *ep; 2859 int rc = 0; 2860 2861 switch (msg_type) { 2862 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2863 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2864 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2865 break; 2866 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2867 if (!transport->ep_poll) 2868 return -EINVAL; 2869 2870 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2871 if (!ep) 2872 return -EINVAL; 2873 2874 ev->r.retcode = transport->ep_poll(ep, 2875 ev->u.ep_poll.timeout_ms); 2876 break; 2877 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 2878 rc = iscsi_if_ep_disconnect(transport, 2879 ev->u.ep_disconnect.ep_handle); 2880 break; 2881 } 2882 return rc; 2883 } 2884 2885 static int 2886 iscsi_tgt_dscvr(struct iscsi_transport *transport, 2887 struct iscsi_uevent *ev) 2888 { 2889 struct Scsi_Host *shost; 2890 struct sockaddr *dst_addr; 2891 int err; 2892 2893 if (!transport->tgt_dscvr) 2894 return -EINVAL; 2895 2896 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 2897 if (!shost) { 2898 printk(KERN_ERR "target discovery could not find host no %u\n", 2899 ev->u.tgt_dscvr.host_no); 2900 return -ENODEV; 2901 } 2902 2903 2904 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2905 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 2906 ev->u.tgt_dscvr.enable, dst_addr); 2907 scsi_host_put(shost); 2908 return err; 2909 } 2910 2911 static int 2912 iscsi_set_host_param(struct iscsi_transport *transport, 2913 struct iscsi_uevent *ev) 2914 { 2915 char *data = (char*)ev + sizeof(*ev); 2916 struct Scsi_Host *shost; 2917 int err; 2918 2919 if (!transport->set_host_param) 2920 return -ENOSYS; 2921 2922 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 2923 if (!shost) { 2924 printk(KERN_ERR "set_host_param could not find host no %u\n", 2925 ev->u.set_host_param.host_no); 2926 return -ENODEV; 2927 } 2928 2929 err = transport->set_host_param(shost, ev->u.set_host_param.param, 2930 data, ev->u.set_host_param.len); 2931 scsi_host_put(shost); 2932 return err; 2933 } 2934 2935 static int 2936 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2937 { 2938 struct Scsi_Host *shost; 2939 struct iscsi_path *params; 2940 int err; 2941 2942 if (!transport->set_path) 2943 return -ENOSYS; 2944 2945 shost = scsi_host_lookup(ev->u.set_path.host_no); 2946 if (!shost) { 2947 printk(KERN_ERR "set path could not find host no %u\n", 2948 ev->u.set_path.host_no); 2949 return -ENODEV; 2950 } 2951 2952 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 2953 err = transport->set_path(shost, params); 2954 2955 scsi_host_put(shost); 2956 return err; 2957 } 2958 2959 static int 2960 iscsi_set_iface_params(struct iscsi_transport *transport, 2961 struct iscsi_uevent *ev, uint32_t len) 2962 { 2963 char *data = (char *)ev + sizeof(*ev); 2964 struct Scsi_Host *shost; 2965 int err; 2966 2967 if (!transport->set_iface_param) 2968 return -ENOSYS; 2969 2970 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 2971 if (!shost) { 2972 printk(KERN_ERR "set_iface_params could not find host no %u\n", 2973 ev->u.set_iface_params.host_no); 2974 return -ENODEV; 2975 } 2976 2977 err = transport->set_iface_param(shost, data, len); 2978 scsi_host_put(shost); 2979 return err; 2980 } 2981 2982 static int 2983 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2984 { 2985 struct Scsi_Host *shost; 2986 struct sockaddr *dst_addr; 2987 int err; 2988 2989 if (!transport->send_ping) 2990 return -ENOSYS; 2991 2992 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 2993 if (!shost) { 2994 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 2995 ev->u.iscsi_ping.host_no); 2996 return -ENODEV; 2997 } 2998 2999 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3000 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3001 ev->u.iscsi_ping.iface_type, 3002 ev->u.iscsi_ping.payload_size, 3003 ev->u.iscsi_ping.pid, 3004 dst_addr); 3005 scsi_host_put(shost); 3006 return err; 3007 } 3008 3009 static int 3010 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3011 { 3012 struct iscsi_uevent *ev = nlmsg_data(nlh); 3013 struct Scsi_Host *shost = NULL; 3014 struct iscsi_chap_rec *chap_rec; 3015 struct iscsi_internal *priv; 3016 struct sk_buff *skbchap; 3017 struct nlmsghdr *nlhchap; 3018 struct iscsi_uevent *evchap; 3019 uint32_t chap_buf_size; 3020 int len, err = 0; 3021 char *buf; 3022 3023 if (!transport->get_chap) 3024 return -EINVAL; 3025 3026 priv = iscsi_if_transport_lookup(transport); 3027 if (!priv) 3028 return -EINVAL; 3029 3030 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3031 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3032 3033 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3034 if (!shost) { 3035 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3036 __func__, ev->u.get_chap.host_no); 3037 return -ENODEV; 3038 } 3039 3040 do { 3041 int actual_size; 3042 3043 skbchap = alloc_skb(len, GFP_KERNEL); 3044 if (!skbchap) { 3045 printk(KERN_ERR "can not deliver chap: OOM\n"); 3046 err = -ENOMEM; 3047 goto exit_get_chap; 3048 } 3049 3050 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3051 (len - sizeof(*nlhchap)), 0); 3052 evchap = nlmsg_data(nlhchap); 3053 memset(evchap, 0, sizeof(*evchap)); 3054 evchap->transport_handle = iscsi_handle(transport); 3055 evchap->type = nlh->nlmsg_type; 3056 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3057 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3058 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3059 buf = (char *)evchap + sizeof(*evchap); 3060 memset(buf, 0, chap_buf_size); 3061 3062 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3063 &evchap->u.get_chap.num_entries, buf); 3064 3065 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3066 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3067 nlhchap->nlmsg_len = actual_size; 3068 3069 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3070 GFP_KERNEL); 3071 } while (err < 0 && err != -ECONNREFUSED); 3072 3073 exit_get_chap: 3074 scsi_host_put(shost); 3075 return err; 3076 } 3077 3078 static int iscsi_set_chap(struct iscsi_transport *transport, 3079 struct iscsi_uevent *ev, uint32_t len) 3080 { 3081 char *data = (char *)ev + sizeof(*ev); 3082 struct Scsi_Host *shost; 3083 int err = 0; 3084 3085 if (!transport->set_chap) 3086 return -ENOSYS; 3087 3088 shost = scsi_host_lookup(ev->u.set_path.host_no); 3089 if (!shost) { 3090 pr_err("%s could not find host no %u\n", 3091 __func__, ev->u.set_path.host_no); 3092 return -ENODEV; 3093 } 3094 3095 err = transport->set_chap(shost, data, len); 3096 scsi_host_put(shost); 3097 return err; 3098 } 3099 3100 static int iscsi_delete_chap(struct iscsi_transport *transport, 3101 struct iscsi_uevent *ev) 3102 { 3103 struct Scsi_Host *shost; 3104 int err = 0; 3105 3106 if (!transport->delete_chap) 3107 return -ENOSYS; 3108 3109 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3110 if (!shost) { 3111 printk(KERN_ERR "%s could not find host no %u\n", 3112 __func__, ev->u.delete_chap.host_no); 3113 return -ENODEV; 3114 } 3115 3116 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3117 scsi_host_put(shost); 3118 return err; 3119 } 3120 3121 static const struct { 3122 enum iscsi_discovery_parent_type value; 3123 char *name; 3124 } iscsi_discovery_parent_names[] = { 3125 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3126 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3127 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3128 }; 3129 3130 char *iscsi_get_discovery_parent_name(int parent_type) 3131 { 3132 int i; 3133 char *state = "Unknown!"; 3134 3135 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3136 if (iscsi_discovery_parent_names[i].value & parent_type) { 3137 state = iscsi_discovery_parent_names[i].name; 3138 break; 3139 } 3140 } 3141 return state; 3142 } 3143 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3144 3145 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3146 struct iscsi_uevent *ev, uint32_t len) 3147 { 3148 char *data = (char *)ev + sizeof(*ev); 3149 struct Scsi_Host *shost; 3150 struct iscsi_bus_flash_session *fnode_sess; 3151 struct iscsi_bus_flash_conn *fnode_conn; 3152 struct device *dev; 3153 uint32_t idx; 3154 int err = 0; 3155 3156 if (!transport->set_flashnode_param) { 3157 err = -ENOSYS; 3158 goto exit_set_fnode; 3159 } 3160 3161 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3162 if (!shost) { 3163 pr_err("%s could not find host no %u\n", 3164 __func__, ev->u.set_flashnode.host_no); 3165 err = -ENODEV; 3166 goto put_host; 3167 } 3168 3169 idx = ev->u.set_flashnode.flashnode_idx; 3170 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3171 if (!fnode_sess) { 3172 pr_err("%s could not find flashnode %u for host no %u\n", 3173 __func__, idx, ev->u.set_flashnode.host_no); 3174 err = -ENODEV; 3175 goto put_host; 3176 } 3177 3178 dev = iscsi_find_flashnode_conn(fnode_sess); 3179 if (!dev) { 3180 err = -ENODEV; 3181 goto put_sess; 3182 } 3183 3184 fnode_conn = iscsi_dev_to_flash_conn(dev); 3185 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3186 put_device(dev); 3187 3188 put_sess: 3189 put_device(&fnode_sess->dev); 3190 3191 put_host: 3192 scsi_host_put(shost); 3193 3194 exit_set_fnode: 3195 return err; 3196 } 3197 3198 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3199 struct iscsi_uevent *ev, uint32_t len) 3200 { 3201 char *data = (char *)ev + sizeof(*ev); 3202 struct Scsi_Host *shost; 3203 int index; 3204 int err = 0; 3205 3206 if (!transport->new_flashnode) { 3207 err = -ENOSYS; 3208 goto exit_new_fnode; 3209 } 3210 3211 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3212 if (!shost) { 3213 pr_err("%s could not find host no %u\n", 3214 __func__, ev->u.new_flashnode.host_no); 3215 err = -ENODEV; 3216 goto put_host; 3217 } 3218 3219 index = transport->new_flashnode(shost, data, len); 3220 3221 if (index >= 0) 3222 ev->r.new_flashnode_ret.flashnode_idx = index; 3223 else 3224 err = -EIO; 3225 3226 put_host: 3227 scsi_host_put(shost); 3228 3229 exit_new_fnode: 3230 return err; 3231 } 3232 3233 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3234 struct iscsi_uevent *ev) 3235 { 3236 struct Scsi_Host *shost; 3237 struct iscsi_bus_flash_session *fnode_sess; 3238 uint32_t idx; 3239 int err = 0; 3240 3241 if (!transport->del_flashnode) { 3242 err = -ENOSYS; 3243 goto exit_del_fnode; 3244 } 3245 3246 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3247 if (!shost) { 3248 pr_err("%s could not find host no %u\n", 3249 __func__, ev->u.del_flashnode.host_no); 3250 err = -ENODEV; 3251 goto put_host; 3252 } 3253 3254 idx = ev->u.del_flashnode.flashnode_idx; 3255 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3256 if (!fnode_sess) { 3257 pr_err("%s could not find flashnode %u for host no %u\n", 3258 __func__, idx, ev->u.del_flashnode.host_no); 3259 err = -ENODEV; 3260 goto put_host; 3261 } 3262 3263 err = transport->del_flashnode(fnode_sess); 3264 put_device(&fnode_sess->dev); 3265 3266 put_host: 3267 scsi_host_put(shost); 3268 3269 exit_del_fnode: 3270 return err; 3271 } 3272 3273 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3274 struct iscsi_uevent *ev) 3275 { 3276 struct Scsi_Host *shost; 3277 struct iscsi_bus_flash_session *fnode_sess; 3278 struct iscsi_bus_flash_conn *fnode_conn; 3279 struct device *dev; 3280 uint32_t idx; 3281 int err = 0; 3282 3283 if (!transport->login_flashnode) { 3284 err = -ENOSYS; 3285 goto exit_login_fnode; 3286 } 3287 3288 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3289 if (!shost) { 3290 pr_err("%s could not find host no %u\n", 3291 __func__, ev->u.login_flashnode.host_no); 3292 err = -ENODEV; 3293 goto put_host; 3294 } 3295 3296 idx = ev->u.login_flashnode.flashnode_idx; 3297 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3298 if (!fnode_sess) { 3299 pr_err("%s could not find flashnode %u for host no %u\n", 3300 __func__, idx, ev->u.login_flashnode.host_no); 3301 err = -ENODEV; 3302 goto put_host; 3303 } 3304 3305 dev = iscsi_find_flashnode_conn(fnode_sess); 3306 if (!dev) { 3307 err = -ENODEV; 3308 goto put_sess; 3309 } 3310 3311 fnode_conn = iscsi_dev_to_flash_conn(dev); 3312 err = transport->login_flashnode(fnode_sess, fnode_conn); 3313 put_device(dev); 3314 3315 put_sess: 3316 put_device(&fnode_sess->dev); 3317 3318 put_host: 3319 scsi_host_put(shost); 3320 3321 exit_login_fnode: 3322 return err; 3323 } 3324 3325 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3326 struct iscsi_uevent *ev) 3327 { 3328 struct Scsi_Host *shost; 3329 struct iscsi_bus_flash_session *fnode_sess; 3330 struct iscsi_bus_flash_conn *fnode_conn; 3331 struct device *dev; 3332 uint32_t idx; 3333 int err = 0; 3334 3335 if (!transport->logout_flashnode) { 3336 err = -ENOSYS; 3337 goto exit_logout_fnode; 3338 } 3339 3340 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3341 if (!shost) { 3342 pr_err("%s could not find host no %u\n", 3343 __func__, ev->u.logout_flashnode.host_no); 3344 err = -ENODEV; 3345 goto put_host; 3346 } 3347 3348 idx = ev->u.logout_flashnode.flashnode_idx; 3349 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3350 if (!fnode_sess) { 3351 pr_err("%s could not find flashnode %u for host no %u\n", 3352 __func__, idx, ev->u.logout_flashnode.host_no); 3353 err = -ENODEV; 3354 goto put_host; 3355 } 3356 3357 dev = iscsi_find_flashnode_conn(fnode_sess); 3358 if (!dev) { 3359 err = -ENODEV; 3360 goto put_sess; 3361 } 3362 3363 fnode_conn = iscsi_dev_to_flash_conn(dev); 3364 3365 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3366 put_device(dev); 3367 3368 put_sess: 3369 put_device(&fnode_sess->dev); 3370 3371 put_host: 3372 scsi_host_put(shost); 3373 3374 exit_logout_fnode: 3375 return err; 3376 } 3377 3378 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3379 struct iscsi_uevent *ev) 3380 { 3381 struct Scsi_Host *shost; 3382 struct iscsi_cls_session *session; 3383 int err = 0; 3384 3385 if (!transport->logout_flashnode_sid) { 3386 err = -ENOSYS; 3387 goto exit_logout_sid; 3388 } 3389 3390 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3391 if (!shost) { 3392 pr_err("%s could not find host no %u\n", 3393 __func__, ev->u.logout_flashnode.host_no); 3394 err = -ENODEV; 3395 goto put_host; 3396 } 3397 3398 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3399 if (!session) { 3400 pr_err("%s could not find session id %u\n", 3401 __func__, ev->u.logout_flashnode_sid.sid); 3402 err = -EINVAL; 3403 goto put_host; 3404 } 3405 3406 err = transport->logout_flashnode_sid(session); 3407 3408 put_host: 3409 scsi_host_put(shost); 3410 3411 exit_logout_sid: 3412 return err; 3413 } 3414 3415 static int 3416 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3417 { 3418 struct iscsi_uevent *ev = nlmsg_data(nlh); 3419 struct Scsi_Host *shost = NULL; 3420 struct iscsi_internal *priv; 3421 struct sk_buff *skbhost_stats; 3422 struct nlmsghdr *nlhhost_stats; 3423 struct iscsi_uevent *evhost_stats; 3424 int host_stats_size = 0; 3425 int len, err = 0; 3426 char *buf; 3427 3428 if (!transport->get_host_stats) 3429 return -ENOSYS; 3430 3431 priv = iscsi_if_transport_lookup(transport); 3432 if (!priv) 3433 return -EINVAL; 3434 3435 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3436 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3437 3438 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3439 if (!shost) { 3440 pr_err("%s: failed. Could not find host no %u\n", 3441 __func__, ev->u.get_host_stats.host_no); 3442 return -ENODEV; 3443 } 3444 3445 do { 3446 int actual_size; 3447 3448 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3449 if (!skbhost_stats) { 3450 pr_err("cannot deliver host stats: OOM\n"); 3451 err = -ENOMEM; 3452 goto exit_host_stats; 3453 } 3454 3455 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3456 (len - sizeof(*nlhhost_stats)), 0); 3457 evhost_stats = nlmsg_data(nlhhost_stats); 3458 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3459 evhost_stats->transport_handle = iscsi_handle(transport); 3460 evhost_stats->type = nlh->nlmsg_type; 3461 evhost_stats->u.get_host_stats.host_no = 3462 ev->u.get_host_stats.host_no; 3463 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3464 memset(buf, 0, host_stats_size); 3465 3466 err = transport->get_host_stats(shost, buf, host_stats_size); 3467 if (err) { 3468 kfree_skb(skbhost_stats); 3469 goto exit_host_stats; 3470 } 3471 3472 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3473 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3474 nlhhost_stats->nlmsg_len = actual_size; 3475 3476 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3477 GFP_KERNEL); 3478 } while (err < 0 && err != -ECONNREFUSED); 3479 3480 exit_host_stats: 3481 scsi_host_put(shost); 3482 return err; 3483 } 3484 3485 3486 static int 3487 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3488 { 3489 int err = 0; 3490 u32 portid; 3491 struct iscsi_uevent *ev = nlmsg_data(nlh); 3492 struct iscsi_transport *transport = NULL; 3493 struct iscsi_internal *priv; 3494 struct iscsi_cls_session *session; 3495 struct iscsi_cls_conn *conn; 3496 struct iscsi_endpoint *ep = NULL; 3497 3498 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3499 *group = ISCSI_NL_GRP_UIP; 3500 else 3501 *group = ISCSI_NL_GRP_ISCSID; 3502 3503 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3504 if (!priv) 3505 return -EINVAL; 3506 transport = priv->iscsi_transport; 3507 3508 if (!try_module_get(transport->owner)) 3509 return -EINVAL; 3510 3511 portid = NETLINK_CB(skb).portid; 3512 3513 switch (nlh->nlmsg_type) { 3514 case ISCSI_UEVENT_CREATE_SESSION: 3515 err = iscsi_if_create_session(priv, ep, ev, 3516 portid, 3517 ev->u.c_session.initial_cmdsn, 3518 ev->u.c_session.cmds_max, 3519 ev->u.c_session.queue_depth); 3520 break; 3521 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3522 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3523 if (!ep) { 3524 err = -EINVAL; 3525 break; 3526 } 3527 3528 err = iscsi_if_create_session(priv, ep, ev, 3529 portid, 3530 ev->u.c_bound_session.initial_cmdsn, 3531 ev->u.c_bound_session.cmds_max, 3532 ev->u.c_bound_session.queue_depth); 3533 break; 3534 case ISCSI_UEVENT_DESTROY_SESSION: 3535 session = iscsi_session_lookup(ev->u.d_session.sid); 3536 if (session) 3537 transport->destroy_session(session); 3538 else 3539 err = -EINVAL; 3540 break; 3541 case ISCSI_UEVENT_UNBIND_SESSION: 3542 session = iscsi_session_lookup(ev->u.d_session.sid); 3543 if (session) 3544 scsi_queue_work(iscsi_session_to_shost(session), 3545 &session->unbind_work); 3546 else 3547 err = -EINVAL; 3548 break; 3549 case ISCSI_UEVENT_CREATE_CONN: 3550 err = iscsi_if_create_conn(transport, ev); 3551 break; 3552 case ISCSI_UEVENT_DESTROY_CONN: 3553 err = iscsi_if_destroy_conn(transport, ev); 3554 break; 3555 case ISCSI_UEVENT_BIND_CONN: 3556 session = iscsi_session_lookup(ev->u.b_conn.sid); 3557 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3558 3559 if (conn && conn->ep) 3560 iscsi_if_ep_disconnect(transport, conn->ep->id); 3561 3562 if (!session || !conn) { 3563 err = -EINVAL; 3564 break; 3565 } 3566 3567 ev->r.retcode = transport->bind_conn(session, conn, 3568 ev->u.b_conn.transport_eph, 3569 ev->u.b_conn.is_leading); 3570 if (ev->r.retcode || !transport->ep_connect) 3571 break; 3572 3573 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3574 if (ep) { 3575 ep->conn = conn; 3576 3577 mutex_lock(&conn->ep_mutex); 3578 conn->ep = ep; 3579 mutex_unlock(&conn->ep_mutex); 3580 } else 3581 iscsi_cls_conn_printk(KERN_ERR, conn, 3582 "Could not set ep conn " 3583 "binding\n"); 3584 break; 3585 case ISCSI_UEVENT_SET_PARAM: 3586 err = iscsi_set_param(transport, ev); 3587 break; 3588 case ISCSI_UEVENT_START_CONN: 3589 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3590 if (conn) 3591 ev->r.retcode = transport->start_conn(conn); 3592 else 3593 err = -EINVAL; 3594 break; 3595 case ISCSI_UEVENT_STOP_CONN: 3596 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3597 if (conn) 3598 transport->stop_conn(conn, ev->u.stop_conn.flag); 3599 else 3600 err = -EINVAL; 3601 break; 3602 case ISCSI_UEVENT_SEND_PDU: 3603 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3604 if (conn) 3605 ev->r.retcode = transport->send_pdu(conn, 3606 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3607 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3608 ev->u.send_pdu.data_size); 3609 else 3610 err = -EINVAL; 3611 break; 3612 case ISCSI_UEVENT_GET_STATS: 3613 err = iscsi_if_get_stats(transport, nlh); 3614 break; 3615 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3616 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3617 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3618 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3619 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3620 break; 3621 case ISCSI_UEVENT_TGT_DSCVR: 3622 err = iscsi_tgt_dscvr(transport, ev); 3623 break; 3624 case ISCSI_UEVENT_SET_HOST_PARAM: 3625 err = iscsi_set_host_param(transport, ev); 3626 break; 3627 case ISCSI_UEVENT_PATH_UPDATE: 3628 err = iscsi_set_path(transport, ev); 3629 break; 3630 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3631 err = iscsi_set_iface_params(transport, ev, 3632 nlmsg_attrlen(nlh, sizeof(*ev))); 3633 break; 3634 case ISCSI_UEVENT_PING: 3635 err = iscsi_send_ping(transport, ev); 3636 break; 3637 case ISCSI_UEVENT_GET_CHAP: 3638 err = iscsi_get_chap(transport, nlh); 3639 break; 3640 case ISCSI_UEVENT_DELETE_CHAP: 3641 err = iscsi_delete_chap(transport, ev); 3642 break; 3643 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3644 err = iscsi_set_flashnode_param(transport, ev, 3645 nlmsg_attrlen(nlh, 3646 sizeof(*ev))); 3647 break; 3648 case ISCSI_UEVENT_NEW_FLASHNODE: 3649 err = iscsi_new_flashnode(transport, ev, 3650 nlmsg_attrlen(nlh, sizeof(*ev))); 3651 break; 3652 case ISCSI_UEVENT_DEL_FLASHNODE: 3653 err = iscsi_del_flashnode(transport, ev); 3654 break; 3655 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3656 err = iscsi_login_flashnode(transport, ev); 3657 break; 3658 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3659 err = iscsi_logout_flashnode(transport, ev); 3660 break; 3661 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3662 err = iscsi_logout_flashnode_sid(transport, ev); 3663 break; 3664 case ISCSI_UEVENT_SET_CHAP: 3665 err = iscsi_set_chap(transport, ev, 3666 nlmsg_attrlen(nlh, sizeof(*ev))); 3667 break; 3668 case ISCSI_UEVENT_GET_HOST_STATS: 3669 err = iscsi_get_host_stats(transport, nlh); 3670 break; 3671 default: 3672 err = -ENOSYS; 3673 break; 3674 } 3675 3676 module_put(transport->owner); 3677 return err; 3678 } 3679 3680 /* 3681 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3682 * Malformed skbs with wrong lengths or invalid creds are not processed. 3683 */ 3684 static void 3685 iscsi_if_rx(struct sk_buff *skb) 3686 { 3687 u32 portid = NETLINK_CB(skb).portid; 3688 3689 mutex_lock(&rx_queue_mutex); 3690 while (skb->len >= NLMSG_HDRLEN) { 3691 int err; 3692 uint32_t rlen; 3693 struct nlmsghdr *nlh; 3694 struct iscsi_uevent *ev; 3695 uint32_t group; 3696 3697 nlh = nlmsg_hdr(skb); 3698 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3699 skb->len < nlh->nlmsg_len) { 3700 break; 3701 } 3702 3703 ev = nlmsg_data(nlh); 3704 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3705 if (rlen > skb->len) 3706 rlen = skb->len; 3707 3708 err = iscsi_if_recv_msg(skb, nlh, &group); 3709 if (err) { 3710 ev->type = ISCSI_KEVENT_IF_ERROR; 3711 ev->iferror = err; 3712 } 3713 do { 3714 /* 3715 * special case for GET_STATS: 3716 * on success - sending reply and stats from 3717 * inside of if_recv_msg(), 3718 * on error - fall through. 3719 */ 3720 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3721 break; 3722 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3723 break; 3724 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 3725 ev, sizeof(*ev)); 3726 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3727 skb_pull(skb, rlen); 3728 } 3729 mutex_unlock(&rx_queue_mutex); 3730 } 3731 3732 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3733 struct device_attribute dev_attr_##_prefix##_##_name = \ 3734 __ATTR(_name,_mode,_show,_store) 3735 3736 /* 3737 * iSCSI connection attrs 3738 */ 3739 #define iscsi_conn_attr_show(param) \ 3740 static ssize_t \ 3741 show_conn_param_##param(struct device *dev, \ 3742 struct device_attribute *attr, char *buf) \ 3743 { \ 3744 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3745 struct iscsi_transport *t = conn->transport; \ 3746 return t->get_conn_param(conn, param, buf); \ 3747 } 3748 3749 #define iscsi_conn_attr(field, param) \ 3750 iscsi_conn_attr_show(param) \ 3751 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3752 NULL); 3753 3754 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3755 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3756 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3757 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3758 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3759 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3760 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3761 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3762 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3763 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3764 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3765 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3766 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3767 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3768 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3769 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3770 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3771 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3772 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3773 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3774 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3775 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3776 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3777 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3778 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3779 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3780 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3781 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3782 3783 3784 #define iscsi_conn_ep_attr_show(param) \ 3785 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 3786 struct device_attribute *attr,\ 3787 char *buf) \ 3788 { \ 3789 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3790 struct iscsi_transport *t = conn->transport; \ 3791 struct iscsi_endpoint *ep; \ 3792 ssize_t rc; \ 3793 \ 3794 /* \ 3795 * Need to make sure ep_disconnect does not free the LLD's \ 3796 * interconnect resources while we are trying to read them. \ 3797 */ \ 3798 mutex_lock(&conn->ep_mutex); \ 3799 ep = conn->ep; \ 3800 if (!ep && t->ep_connect) { \ 3801 mutex_unlock(&conn->ep_mutex); \ 3802 return -ENOTCONN; \ 3803 } \ 3804 \ 3805 if (ep) \ 3806 rc = t->get_ep_param(ep, param, buf); \ 3807 else \ 3808 rc = t->get_conn_param(conn, param, buf); \ 3809 mutex_unlock(&conn->ep_mutex); \ 3810 return rc; \ 3811 } 3812 3813 #define iscsi_conn_ep_attr(field, param) \ 3814 iscsi_conn_ep_attr_show(param) \ 3815 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 3816 show_conn_ep_param_##param, NULL); 3817 3818 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 3819 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 3820 3821 static struct attribute *iscsi_conn_attrs[] = { 3822 &dev_attr_conn_max_recv_dlength.attr, 3823 &dev_attr_conn_max_xmit_dlength.attr, 3824 &dev_attr_conn_header_digest.attr, 3825 &dev_attr_conn_data_digest.attr, 3826 &dev_attr_conn_ifmarker.attr, 3827 &dev_attr_conn_ofmarker.attr, 3828 &dev_attr_conn_address.attr, 3829 &dev_attr_conn_port.attr, 3830 &dev_attr_conn_exp_statsn.attr, 3831 &dev_attr_conn_persistent_address.attr, 3832 &dev_attr_conn_persistent_port.attr, 3833 &dev_attr_conn_ping_tmo.attr, 3834 &dev_attr_conn_recv_tmo.attr, 3835 &dev_attr_conn_local_port.attr, 3836 &dev_attr_conn_statsn.attr, 3837 &dev_attr_conn_keepalive_tmo.attr, 3838 &dev_attr_conn_max_segment_size.attr, 3839 &dev_attr_conn_tcp_timestamp_stat.attr, 3840 &dev_attr_conn_tcp_wsf_disable.attr, 3841 &dev_attr_conn_tcp_nagle_disable.attr, 3842 &dev_attr_conn_tcp_timer_scale.attr, 3843 &dev_attr_conn_tcp_timestamp_enable.attr, 3844 &dev_attr_conn_fragment_disable.attr, 3845 &dev_attr_conn_ipv4_tos.attr, 3846 &dev_attr_conn_ipv6_traffic_class.attr, 3847 &dev_attr_conn_ipv6_flow_label.attr, 3848 &dev_attr_conn_is_fw_assigned_ipv6.attr, 3849 &dev_attr_conn_tcp_xmit_wsf.attr, 3850 &dev_attr_conn_tcp_recv_wsf.attr, 3851 &dev_attr_conn_local_ipaddr.attr, 3852 NULL, 3853 }; 3854 3855 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 3856 struct attribute *attr, int i) 3857 { 3858 struct device *cdev = container_of(kobj, struct device, kobj); 3859 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 3860 struct iscsi_transport *t = conn->transport; 3861 int param; 3862 3863 if (attr == &dev_attr_conn_max_recv_dlength.attr) 3864 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 3865 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 3866 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 3867 else if (attr == &dev_attr_conn_header_digest.attr) 3868 param = ISCSI_PARAM_HDRDGST_EN; 3869 else if (attr == &dev_attr_conn_data_digest.attr) 3870 param = ISCSI_PARAM_DATADGST_EN; 3871 else if (attr == &dev_attr_conn_ifmarker.attr) 3872 param = ISCSI_PARAM_IFMARKER_EN; 3873 else if (attr == &dev_attr_conn_ofmarker.attr) 3874 param = ISCSI_PARAM_OFMARKER_EN; 3875 else if (attr == &dev_attr_conn_address.attr) 3876 param = ISCSI_PARAM_CONN_ADDRESS; 3877 else if (attr == &dev_attr_conn_port.attr) 3878 param = ISCSI_PARAM_CONN_PORT; 3879 else if (attr == &dev_attr_conn_exp_statsn.attr) 3880 param = ISCSI_PARAM_EXP_STATSN; 3881 else if (attr == &dev_attr_conn_persistent_address.attr) 3882 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 3883 else if (attr == &dev_attr_conn_persistent_port.attr) 3884 param = ISCSI_PARAM_PERSISTENT_PORT; 3885 else if (attr == &dev_attr_conn_ping_tmo.attr) 3886 param = ISCSI_PARAM_PING_TMO; 3887 else if (attr == &dev_attr_conn_recv_tmo.attr) 3888 param = ISCSI_PARAM_RECV_TMO; 3889 else if (attr == &dev_attr_conn_local_port.attr) 3890 param = ISCSI_PARAM_LOCAL_PORT; 3891 else if (attr == &dev_attr_conn_statsn.attr) 3892 param = ISCSI_PARAM_STATSN; 3893 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 3894 param = ISCSI_PARAM_KEEPALIVE_TMO; 3895 else if (attr == &dev_attr_conn_max_segment_size.attr) 3896 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 3897 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 3898 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 3899 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 3900 param = ISCSI_PARAM_TCP_WSF_DISABLE; 3901 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 3902 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 3903 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 3904 param = ISCSI_PARAM_TCP_TIMER_SCALE; 3905 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 3906 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 3907 else if (attr == &dev_attr_conn_fragment_disable.attr) 3908 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 3909 else if (attr == &dev_attr_conn_ipv4_tos.attr) 3910 param = ISCSI_PARAM_IPV4_TOS; 3911 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 3912 param = ISCSI_PARAM_IPV6_TC; 3913 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 3914 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 3915 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 3916 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 3917 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 3918 param = ISCSI_PARAM_TCP_XMIT_WSF; 3919 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 3920 param = ISCSI_PARAM_TCP_RECV_WSF; 3921 else if (attr == &dev_attr_conn_local_ipaddr.attr) 3922 param = ISCSI_PARAM_LOCAL_IPADDR; 3923 else { 3924 WARN_ONCE(1, "Invalid conn attr"); 3925 return 0; 3926 } 3927 3928 return t->attr_is_visible(ISCSI_PARAM, param); 3929 } 3930 3931 static struct attribute_group iscsi_conn_group = { 3932 .attrs = iscsi_conn_attrs, 3933 .is_visible = iscsi_conn_attr_is_visible, 3934 }; 3935 3936 /* 3937 * iSCSI session attrs 3938 */ 3939 #define iscsi_session_attr_show(param, perm) \ 3940 static ssize_t \ 3941 show_session_param_##param(struct device *dev, \ 3942 struct device_attribute *attr, char *buf) \ 3943 { \ 3944 struct iscsi_cls_session *session = \ 3945 iscsi_dev_to_session(dev->parent); \ 3946 struct iscsi_transport *t = session->transport; \ 3947 \ 3948 if (perm && !capable(CAP_SYS_ADMIN)) \ 3949 return -EACCES; \ 3950 return t->get_session_param(session, param, buf); \ 3951 } 3952 3953 #define iscsi_session_attr(field, param, perm) \ 3954 iscsi_session_attr_show(param, perm) \ 3955 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 3956 NULL); 3957 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 3958 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 3959 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 3960 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 3961 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 3962 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 3963 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 3964 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 3965 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 3966 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 3967 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 3968 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 3969 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 3970 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 3971 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 3972 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 3973 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 3974 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 3975 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 3976 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 3977 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 3978 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 3979 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 3980 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 3981 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 3982 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 3983 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 3984 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 3985 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 3986 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 3987 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 3988 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 3989 iscsi_session_attr(discovery_auth_optional, 3990 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 3991 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 3992 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 3993 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 3994 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 3995 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 3996 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 3997 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 3998 3999 static ssize_t 4000 show_priv_session_state(struct device *dev, struct device_attribute *attr, 4001 char *buf) 4002 { 4003 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4004 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); 4005 } 4006 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4007 NULL); 4008 static ssize_t 4009 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4010 char *buf) 4011 { 4012 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4013 return sprintf(buf, "%d\n", session->creator); 4014 } 4015 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4016 NULL); 4017 static ssize_t 4018 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4019 char *buf) 4020 { 4021 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4022 return sprintf(buf, "%d\n", session->target_id); 4023 } 4024 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4025 show_priv_session_target_id, NULL); 4026 4027 #define iscsi_priv_session_attr_show(field, format) \ 4028 static ssize_t \ 4029 show_priv_session_##field(struct device *dev, \ 4030 struct device_attribute *attr, char *buf) \ 4031 { \ 4032 struct iscsi_cls_session *session = \ 4033 iscsi_dev_to_session(dev->parent); \ 4034 if (session->field == -1) \ 4035 return sprintf(buf, "off\n"); \ 4036 return sprintf(buf, format"\n", session->field); \ 4037 } 4038 4039 #define iscsi_priv_session_attr_store(field) \ 4040 static ssize_t \ 4041 store_priv_session_##field(struct device *dev, \ 4042 struct device_attribute *attr, \ 4043 const char *buf, size_t count) \ 4044 { \ 4045 int val; \ 4046 char *cp; \ 4047 struct iscsi_cls_session *session = \ 4048 iscsi_dev_to_session(dev->parent); \ 4049 if ((session->state == ISCSI_SESSION_FREE) || \ 4050 (session->state == ISCSI_SESSION_FAILED)) \ 4051 return -EBUSY; \ 4052 if (strncmp(buf, "off", 3) == 0) { \ 4053 session->field = -1; \ 4054 session->field##_sysfs_override = true; \ 4055 } else { \ 4056 val = simple_strtoul(buf, &cp, 0); \ 4057 if (*cp != '\0' && *cp != '\n') \ 4058 return -EINVAL; \ 4059 session->field = val; \ 4060 session->field##_sysfs_override = true; \ 4061 } \ 4062 return count; \ 4063 } 4064 4065 #define iscsi_priv_session_rw_attr(field, format) \ 4066 iscsi_priv_session_attr_show(field, format) \ 4067 iscsi_priv_session_attr_store(field) \ 4068 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4069 show_priv_session_##field, \ 4070 store_priv_session_##field) 4071 4072 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4073 4074 static struct attribute *iscsi_session_attrs[] = { 4075 &dev_attr_sess_initial_r2t.attr, 4076 &dev_attr_sess_max_outstanding_r2t.attr, 4077 &dev_attr_sess_immediate_data.attr, 4078 &dev_attr_sess_first_burst_len.attr, 4079 &dev_attr_sess_max_burst_len.attr, 4080 &dev_attr_sess_data_pdu_in_order.attr, 4081 &dev_attr_sess_data_seq_in_order.attr, 4082 &dev_attr_sess_erl.attr, 4083 &dev_attr_sess_targetname.attr, 4084 &dev_attr_sess_tpgt.attr, 4085 &dev_attr_sess_password.attr, 4086 &dev_attr_sess_password_in.attr, 4087 &dev_attr_sess_username.attr, 4088 &dev_attr_sess_username_in.attr, 4089 &dev_attr_sess_fast_abort.attr, 4090 &dev_attr_sess_abort_tmo.attr, 4091 &dev_attr_sess_lu_reset_tmo.attr, 4092 &dev_attr_sess_tgt_reset_tmo.attr, 4093 &dev_attr_sess_ifacename.attr, 4094 &dev_attr_sess_initiatorname.attr, 4095 &dev_attr_sess_targetalias.attr, 4096 &dev_attr_sess_boot_root.attr, 4097 &dev_attr_sess_boot_nic.attr, 4098 &dev_attr_sess_boot_target.attr, 4099 &dev_attr_priv_sess_recovery_tmo.attr, 4100 &dev_attr_priv_sess_state.attr, 4101 &dev_attr_priv_sess_creator.attr, 4102 &dev_attr_sess_chap_out_idx.attr, 4103 &dev_attr_sess_chap_in_idx.attr, 4104 &dev_attr_priv_sess_target_id.attr, 4105 &dev_attr_sess_auto_snd_tgt_disable.attr, 4106 &dev_attr_sess_discovery_session.attr, 4107 &dev_attr_sess_portal_type.attr, 4108 &dev_attr_sess_chap_auth.attr, 4109 &dev_attr_sess_discovery_logout.attr, 4110 &dev_attr_sess_bidi_chap.attr, 4111 &dev_attr_sess_discovery_auth_optional.attr, 4112 &dev_attr_sess_def_time2wait.attr, 4113 &dev_attr_sess_def_time2retain.attr, 4114 &dev_attr_sess_isid.attr, 4115 &dev_attr_sess_tsid.attr, 4116 &dev_attr_sess_def_taskmgmt_tmo.attr, 4117 &dev_attr_sess_discovery_parent_idx.attr, 4118 &dev_attr_sess_discovery_parent_type.attr, 4119 NULL, 4120 }; 4121 4122 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4123 struct attribute *attr, int i) 4124 { 4125 struct device *cdev = container_of(kobj, struct device, kobj); 4126 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4127 struct iscsi_transport *t = session->transport; 4128 int param; 4129 4130 if (attr == &dev_attr_sess_initial_r2t.attr) 4131 param = ISCSI_PARAM_INITIAL_R2T_EN; 4132 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4133 param = ISCSI_PARAM_MAX_R2T; 4134 else if (attr == &dev_attr_sess_immediate_data.attr) 4135 param = ISCSI_PARAM_IMM_DATA_EN; 4136 else if (attr == &dev_attr_sess_first_burst_len.attr) 4137 param = ISCSI_PARAM_FIRST_BURST; 4138 else if (attr == &dev_attr_sess_max_burst_len.attr) 4139 param = ISCSI_PARAM_MAX_BURST; 4140 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4141 param = ISCSI_PARAM_PDU_INORDER_EN; 4142 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4143 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4144 else if (attr == &dev_attr_sess_erl.attr) 4145 param = ISCSI_PARAM_ERL; 4146 else if (attr == &dev_attr_sess_targetname.attr) 4147 param = ISCSI_PARAM_TARGET_NAME; 4148 else if (attr == &dev_attr_sess_tpgt.attr) 4149 param = ISCSI_PARAM_TPGT; 4150 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4151 param = ISCSI_PARAM_CHAP_IN_IDX; 4152 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4153 param = ISCSI_PARAM_CHAP_OUT_IDX; 4154 else if (attr == &dev_attr_sess_password.attr) 4155 param = ISCSI_PARAM_USERNAME; 4156 else if (attr == &dev_attr_sess_password_in.attr) 4157 param = ISCSI_PARAM_USERNAME_IN; 4158 else if (attr == &dev_attr_sess_username.attr) 4159 param = ISCSI_PARAM_PASSWORD; 4160 else if (attr == &dev_attr_sess_username_in.attr) 4161 param = ISCSI_PARAM_PASSWORD_IN; 4162 else if (attr == &dev_attr_sess_fast_abort.attr) 4163 param = ISCSI_PARAM_FAST_ABORT; 4164 else if (attr == &dev_attr_sess_abort_tmo.attr) 4165 param = ISCSI_PARAM_ABORT_TMO; 4166 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4167 param = ISCSI_PARAM_LU_RESET_TMO; 4168 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4169 param = ISCSI_PARAM_TGT_RESET_TMO; 4170 else if (attr == &dev_attr_sess_ifacename.attr) 4171 param = ISCSI_PARAM_IFACE_NAME; 4172 else if (attr == &dev_attr_sess_initiatorname.attr) 4173 param = ISCSI_PARAM_INITIATOR_NAME; 4174 else if (attr == &dev_attr_sess_targetalias.attr) 4175 param = ISCSI_PARAM_TARGET_ALIAS; 4176 else if (attr == &dev_attr_sess_boot_root.attr) 4177 param = ISCSI_PARAM_BOOT_ROOT; 4178 else if (attr == &dev_attr_sess_boot_nic.attr) 4179 param = ISCSI_PARAM_BOOT_NIC; 4180 else if (attr == &dev_attr_sess_boot_target.attr) 4181 param = ISCSI_PARAM_BOOT_TARGET; 4182 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4183 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4184 else if (attr == &dev_attr_sess_discovery_session.attr) 4185 param = ISCSI_PARAM_DISCOVERY_SESS; 4186 else if (attr == &dev_attr_sess_portal_type.attr) 4187 param = ISCSI_PARAM_PORTAL_TYPE; 4188 else if (attr == &dev_attr_sess_chap_auth.attr) 4189 param = ISCSI_PARAM_CHAP_AUTH_EN; 4190 else if (attr == &dev_attr_sess_discovery_logout.attr) 4191 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4192 else if (attr == &dev_attr_sess_bidi_chap.attr) 4193 param = ISCSI_PARAM_BIDI_CHAP_EN; 4194 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4195 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4196 else if (attr == &dev_attr_sess_def_time2wait.attr) 4197 param = ISCSI_PARAM_DEF_TIME2WAIT; 4198 else if (attr == &dev_attr_sess_def_time2retain.attr) 4199 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4200 else if (attr == &dev_attr_sess_isid.attr) 4201 param = ISCSI_PARAM_ISID; 4202 else if (attr == &dev_attr_sess_tsid.attr) 4203 param = ISCSI_PARAM_TSID; 4204 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4205 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4206 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4207 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4208 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4209 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4210 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4211 return S_IRUGO | S_IWUSR; 4212 else if (attr == &dev_attr_priv_sess_state.attr) 4213 return S_IRUGO; 4214 else if (attr == &dev_attr_priv_sess_creator.attr) 4215 return S_IRUGO; 4216 else if (attr == &dev_attr_priv_sess_target_id.attr) 4217 return S_IRUGO; 4218 else { 4219 WARN_ONCE(1, "Invalid session attr"); 4220 return 0; 4221 } 4222 4223 return t->attr_is_visible(ISCSI_PARAM, param); 4224 } 4225 4226 static struct attribute_group iscsi_session_group = { 4227 .attrs = iscsi_session_attrs, 4228 .is_visible = iscsi_session_attr_is_visible, 4229 }; 4230 4231 /* 4232 * iSCSI host attrs 4233 */ 4234 #define iscsi_host_attr_show(param) \ 4235 static ssize_t \ 4236 show_host_param_##param(struct device *dev, \ 4237 struct device_attribute *attr, char *buf) \ 4238 { \ 4239 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4240 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4241 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4242 } 4243 4244 #define iscsi_host_attr(field, param) \ 4245 iscsi_host_attr_show(param) \ 4246 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4247 NULL); 4248 4249 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4250 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4251 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4252 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4253 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4254 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4255 4256 static struct attribute *iscsi_host_attrs[] = { 4257 &dev_attr_host_netdev.attr, 4258 &dev_attr_host_hwaddress.attr, 4259 &dev_attr_host_ipaddress.attr, 4260 &dev_attr_host_initiatorname.attr, 4261 &dev_attr_host_port_state.attr, 4262 &dev_attr_host_port_speed.attr, 4263 NULL, 4264 }; 4265 4266 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4267 struct attribute *attr, int i) 4268 { 4269 struct device *cdev = container_of(kobj, struct device, kobj); 4270 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4271 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4272 int param; 4273 4274 if (attr == &dev_attr_host_netdev.attr) 4275 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4276 else if (attr == &dev_attr_host_hwaddress.attr) 4277 param = ISCSI_HOST_PARAM_HWADDRESS; 4278 else if (attr == &dev_attr_host_ipaddress.attr) 4279 param = ISCSI_HOST_PARAM_IPADDRESS; 4280 else if (attr == &dev_attr_host_initiatorname.attr) 4281 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4282 else if (attr == &dev_attr_host_port_state.attr) 4283 param = ISCSI_HOST_PARAM_PORT_STATE; 4284 else if (attr == &dev_attr_host_port_speed.attr) 4285 param = ISCSI_HOST_PARAM_PORT_SPEED; 4286 else { 4287 WARN_ONCE(1, "Invalid host attr"); 4288 return 0; 4289 } 4290 4291 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4292 } 4293 4294 static struct attribute_group iscsi_host_group = { 4295 .attrs = iscsi_host_attrs, 4296 .is_visible = iscsi_host_attr_is_visible, 4297 }; 4298 4299 /* convert iscsi_port_speed values to ascii string name */ 4300 static const struct { 4301 enum iscsi_port_speed value; 4302 char *name; 4303 } iscsi_port_speed_names[] = { 4304 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4305 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4306 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4307 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4308 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4309 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4310 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4311 }; 4312 4313 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4314 { 4315 int i; 4316 char *speed = "Unknown!"; 4317 struct iscsi_cls_host *ihost = shost->shost_data; 4318 uint32_t port_speed = ihost->port_speed; 4319 4320 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4321 if (iscsi_port_speed_names[i].value & port_speed) { 4322 speed = iscsi_port_speed_names[i].name; 4323 break; 4324 } 4325 } 4326 return speed; 4327 } 4328 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4329 4330 /* convert iscsi_port_state values to ascii string name */ 4331 static const struct { 4332 enum iscsi_port_state value; 4333 char *name; 4334 } iscsi_port_state_names[] = { 4335 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4336 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4337 }; 4338 4339 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4340 { 4341 int i; 4342 char *state = "Unknown!"; 4343 struct iscsi_cls_host *ihost = shost->shost_data; 4344 uint32_t port_state = ihost->port_state; 4345 4346 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4347 if (iscsi_port_state_names[i].value & port_state) { 4348 state = iscsi_port_state_names[i].name; 4349 break; 4350 } 4351 } 4352 return state; 4353 } 4354 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4355 4356 static int iscsi_session_match(struct attribute_container *cont, 4357 struct device *dev) 4358 { 4359 struct iscsi_cls_session *session; 4360 struct Scsi_Host *shost; 4361 struct iscsi_internal *priv; 4362 4363 if (!iscsi_is_session_dev(dev)) 4364 return 0; 4365 4366 session = iscsi_dev_to_session(dev); 4367 shost = iscsi_session_to_shost(session); 4368 if (!shost->transportt) 4369 return 0; 4370 4371 priv = to_iscsi_internal(shost->transportt); 4372 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4373 return 0; 4374 4375 return &priv->session_cont.ac == cont; 4376 } 4377 4378 static int iscsi_conn_match(struct attribute_container *cont, 4379 struct device *dev) 4380 { 4381 struct iscsi_cls_session *session; 4382 struct iscsi_cls_conn *conn; 4383 struct Scsi_Host *shost; 4384 struct iscsi_internal *priv; 4385 4386 if (!iscsi_is_conn_dev(dev)) 4387 return 0; 4388 4389 conn = iscsi_dev_to_conn(dev); 4390 session = iscsi_dev_to_session(conn->dev.parent); 4391 shost = iscsi_session_to_shost(session); 4392 4393 if (!shost->transportt) 4394 return 0; 4395 4396 priv = to_iscsi_internal(shost->transportt); 4397 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4398 return 0; 4399 4400 return &priv->conn_cont.ac == cont; 4401 } 4402 4403 static int iscsi_host_match(struct attribute_container *cont, 4404 struct device *dev) 4405 { 4406 struct Scsi_Host *shost; 4407 struct iscsi_internal *priv; 4408 4409 if (!scsi_is_host_device(dev)) 4410 return 0; 4411 4412 shost = dev_to_shost(dev); 4413 if (!shost->transportt || 4414 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4415 return 0; 4416 4417 priv = to_iscsi_internal(shost->transportt); 4418 return &priv->t.host_attrs.ac == cont; 4419 } 4420 4421 struct scsi_transport_template * 4422 iscsi_register_transport(struct iscsi_transport *tt) 4423 { 4424 struct iscsi_internal *priv; 4425 unsigned long flags; 4426 int err; 4427 4428 BUG_ON(!tt); 4429 4430 priv = iscsi_if_transport_lookup(tt); 4431 if (priv) 4432 return NULL; 4433 4434 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4435 if (!priv) 4436 return NULL; 4437 INIT_LIST_HEAD(&priv->list); 4438 priv->iscsi_transport = tt; 4439 priv->t.user_scan = iscsi_user_scan; 4440 priv->t.create_work_queue = 1; 4441 4442 priv->dev.class = &iscsi_transport_class; 4443 dev_set_name(&priv->dev, "%s", tt->name); 4444 err = device_register(&priv->dev); 4445 if (err) 4446 goto free_priv; 4447 4448 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4449 if (err) 4450 goto unregister_dev; 4451 4452 /* host parameters */ 4453 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4454 priv->t.host_attrs.ac.match = iscsi_host_match; 4455 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4456 priv->t.host_size = sizeof(struct iscsi_cls_host); 4457 transport_container_register(&priv->t.host_attrs); 4458 4459 /* connection parameters */ 4460 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4461 priv->conn_cont.ac.match = iscsi_conn_match; 4462 priv->conn_cont.ac.grp = &iscsi_conn_group; 4463 transport_container_register(&priv->conn_cont); 4464 4465 /* session parameters */ 4466 priv->session_cont.ac.class = &iscsi_session_class.class; 4467 priv->session_cont.ac.match = iscsi_session_match; 4468 priv->session_cont.ac.grp = &iscsi_session_group; 4469 transport_container_register(&priv->session_cont); 4470 4471 spin_lock_irqsave(&iscsi_transport_lock, flags); 4472 list_add(&priv->list, &iscsi_transports); 4473 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4474 4475 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4476 return &priv->t; 4477 4478 unregister_dev: 4479 device_unregister(&priv->dev); 4480 return NULL; 4481 free_priv: 4482 kfree(priv); 4483 return NULL; 4484 } 4485 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4486 4487 int iscsi_unregister_transport(struct iscsi_transport *tt) 4488 { 4489 struct iscsi_internal *priv; 4490 unsigned long flags; 4491 4492 BUG_ON(!tt); 4493 4494 mutex_lock(&rx_queue_mutex); 4495 4496 priv = iscsi_if_transport_lookup(tt); 4497 BUG_ON (!priv); 4498 4499 spin_lock_irqsave(&iscsi_transport_lock, flags); 4500 list_del(&priv->list); 4501 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4502 4503 transport_container_unregister(&priv->conn_cont); 4504 transport_container_unregister(&priv->session_cont); 4505 transport_container_unregister(&priv->t.host_attrs); 4506 4507 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4508 device_unregister(&priv->dev); 4509 mutex_unlock(&rx_queue_mutex); 4510 4511 return 0; 4512 } 4513 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4514 4515 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4516 struct device *dev, const char *fmt, ...) 4517 { 4518 struct va_format vaf; 4519 va_list args; 4520 4521 va_start(args, fmt); 4522 vaf.fmt = fmt; 4523 vaf.va = &args; 4524 trace(dev, &vaf); 4525 va_end(args); 4526 } 4527 EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4528 4529 static __init int iscsi_transport_init(void) 4530 { 4531 int err; 4532 struct netlink_kernel_cfg cfg = { 4533 .groups = 1, 4534 .input = iscsi_if_rx, 4535 }; 4536 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4537 ISCSI_TRANSPORT_VERSION); 4538 4539 atomic_set(&iscsi_session_nr, 0); 4540 4541 err = class_register(&iscsi_transport_class); 4542 if (err) 4543 return err; 4544 4545 err = class_register(&iscsi_endpoint_class); 4546 if (err) 4547 goto unregister_transport_class; 4548 4549 err = class_register(&iscsi_iface_class); 4550 if (err) 4551 goto unregister_endpoint_class; 4552 4553 err = transport_class_register(&iscsi_host_class); 4554 if (err) 4555 goto unregister_iface_class; 4556 4557 err = transport_class_register(&iscsi_connection_class); 4558 if (err) 4559 goto unregister_host_class; 4560 4561 err = transport_class_register(&iscsi_session_class); 4562 if (err) 4563 goto unregister_conn_class; 4564 4565 err = bus_register(&iscsi_flashnode_bus); 4566 if (err) 4567 goto unregister_session_class; 4568 4569 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4570 if (!nls) { 4571 err = -ENOBUFS; 4572 goto unregister_flashnode_bus; 4573 } 4574 4575 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); 4576 if (!iscsi_eh_timer_workq) { 4577 err = -ENOMEM; 4578 goto release_nls; 4579 } 4580 4581 return 0; 4582 4583 release_nls: 4584 netlink_kernel_release(nls); 4585 unregister_flashnode_bus: 4586 bus_unregister(&iscsi_flashnode_bus); 4587 unregister_session_class: 4588 transport_class_unregister(&iscsi_session_class); 4589 unregister_conn_class: 4590 transport_class_unregister(&iscsi_connection_class); 4591 unregister_host_class: 4592 transport_class_unregister(&iscsi_host_class); 4593 unregister_iface_class: 4594 class_unregister(&iscsi_iface_class); 4595 unregister_endpoint_class: 4596 class_unregister(&iscsi_endpoint_class); 4597 unregister_transport_class: 4598 class_unregister(&iscsi_transport_class); 4599 return err; 4600 } 4601 4602 static void __exit iscsi_transport_exit(void) 4603 { 4604 destroy_workqueue(iscsi_eh_timer_workq); 4605 netlink_kernel_release(nls); 4606 bus_unregister(&iscsi_flashnode_bus); 4607 transport_class_unregister(&iscsi_connection_class); 4608 transport_class_unregister(&iscsi_session_class); 4609 transport_class_unregister(&iscsi_host_class); 4610 class_unregister(&iscsi_endpoint_class); 4611 class_unregister(&iscsi_iface_class); 4612 class_unregister(&iscsi_transport_class); 4613 } 4614 4615 module_init(iscsi_transport_init); 4616 module_exit(iscsi_transport_exit); 4617 4618 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4619 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4620 "Alex Aizman <itn780@yahoo.com>"); 4621 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4622 MODULE_LICENSE("GPL"); 4623 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4624 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4625