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