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 static const 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 static const 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 static 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 static 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 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1328 { 1329 return dev->bus == &iscsi_flashnode_bus; 1330 } 1331 1332 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1333 { 1334 device_unregister(&fnode_conn->dev); 1335 return 0; 1336 } 1337 1338 static int flashnode_match_index(struct device *dev, void *data) 1339 { 1340 struct iscsi_bus_flash_session *fnode_sess = NULL; 1341 int ret = 0; 1342 1343 if (!iscsi_flashnode_bus_match(dev, NULL)) 1344 goto exit_match_index; 1345 1346 fnode_sess = iscsi_dev_to_flash_session(dev); 1347 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; 1348 1349 exit_match_index: 1350 return ret; 1351 } 1352 1353 /** 1354 * iscsi_get_flashnode_by_index -finds flashnode session entry by index 1355 * @shost: pointer to host data 1356 * @idx: index to match 1357 * 1358 * Finds the flashnode session object for the passed index 1359 * 1360 * Returns: 1361 * pointer to found flashnode session object on success 1362 * %NULL on failure 1363 */ 1364 static struct iscsi_bus_flash_session * 1365 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) 1366 { 1367 struct iscsi_bus_flash_session *fnode_sess = NULL; 1368 struct device *dev; 1369 1370 dev = device_find_child(&shost->shost_gendev, &idx, 1371 flashnode_match_index); 1372 if (dev) 1373 fnode_sess = iscsi_dev_to_flash_session(dev); 1374 1375 return fnode_sess; 1376 } 1377 1378 /** 1379 * iscsi_find_flashnode_sess - finds flashnode session entry 1380 * @shost: pointer to host data 1381 * @data: pointer to data containing value to use for comparison 1382 * @fn: function pointer that does actual comparison 1383 * 1384 * Finds the flashnode session object comparing the data passed using logic 1385 * defined in passed function pointer 1386 * 1387 * Returns: 1388 * pointer to found flashnode session device object on success 1389 * %NULL on failure 1390 */ 1391 struct device * 1392 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, 1393 int (*fn)(struct device *dev, void *data)) 1394 { 1395 return device_find_child(&shost->shost_gendev, data, fn); 1396 } 1397 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); 1398 1399 /** 1400 * iscsi_find_flashnode_conn - finds flashnode connection entry 1401 * @fnode_sess: pointer to parent flashnode session entry 1402 * 1403 * Finds the flashnode connection object comparing the data passed using logic 1404 * defined in passed function pointer 1405 * 1406 * Returns: 1407 * pointer to found flashnode connection device object on success 1408 * %NULL on failure 1409 */ 1410 struct device * 1411 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) 1412 { 1413 return device_find_child(&fnode_sess->dev, NULL, 1414 iscsi_is_flashnode_conn_dev); 1415 } 1416 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1417 1418 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) 1419 { 1420 if (!iscsi_is_flashnode_conn_dev(dev, NULL)) 1421 return 0; 1422 1423 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); 1424 } 1425 1426 /** 1427 * iscsi_destroy_flashnode_sess - destroy flashnode session entry 1428 * @fnode_sess: pointer to flashnode session entry to be destroyed 1429 * 1430 * Deletes the flashnode session entry and all children flashnode connection 1431 * entries from sysfs 1432 */ 1433 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) 1434 { 1435 int err; 1436 1437 err = device_for_each_child(&fnode_sess->dev, NULL, 1438 iscsi_iter_destroy_flashnode_conn_fn); 1439 if (err) 1440 pr_err("Could not delete all connections for %s. Error %d.\n", 1441 fnode_sess->dev.kobj.name, err); 1442 1443 device_unregister(&fnode_sess->dev); 1444 } 1445 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1446 1447 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) 1448 { 1449 if (!iscsi_flashnode_bus_match(dev, NULL)) 1450 return 0; 1451 1452 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); 1453 return 0; 1454 } 1455 1456 /** 1457 * iscsi_destroy_all_flashnode - destroy all flashnode session entries 1458 * @shost: pointer to host data 1459 * 1460 * Destroys all the flashnode session entries and all corresponding children 1461 * flashnode connection entries from sysfs 1462 */ 1463 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) 1464 { 1465 device_for_each_child(&shost->shost_gendev, NULL, 1466 iscsi_iter_destroy_flashnode_fn); 1467 } 1468 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); 1469 1470 /* 1471 * BSG support 1472 */ 1473 /** 1474 * iscsi_bsg_host_dispatch - Dispatch command to LLD. 1475 * @job: bsg job to be processed 1476 */ 1477 static int iscsi_bsg_host_dispatch(struct bsg_job *job) 1478 { 1479 struct Scsi_Host *shost = iscsi_job_to_shost(job); 1480 struct iscsi_bsg_request *req = job->request; 1481 struct iscsi_bsg_reply *reply = job->reply; 1482 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1483 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ 1484 int ret; 1485 1486 /* check if we have the msgcode value at least */ 1487 if (job->request_len < sizeof(uint32_t)) { 1488 ret = -ENOMSG; 1489 goto fail_host_msg; 1490 } 1491 1492 /* Validate the host command */ 1493 switch (req->msgcode) { 1494 case ISCSI_BSG_HST_VENDOR: 1495 cmdlen += sizeof(struct iscsi_bsg_host_vendor); 1496 if ((shost->hostt->vendor_id == 0L) || 1497 (req->rqst_data.h_vendor.vendor_id != 1498 shost->hostt->vendor_id)) { 1499 ret = -ESRCH; 1500 goto fail_host_msg; 1501 } 1502 break; 1503 default: 1504 ret = -EBADR; 1505 goto fail_host_msg; 1506 } 1507 1508 /* check if we really have all the request data needed */ 1509 if (job->request_len < cmdlen) { 1510 ret = -ENOMSG; 1511 goto fail_host_msg; 1512 } 1513 1514 ret = i->iscsi_transport->bsg_request(job); 1515 if (!ret) 1516 return 0; 1517 1518 fail_host_msg: 1519 /* return the errno failure code as the only status */ 1520 BUG_ON(job->reply_len < sizeof(uint32_t)); 1521 reply->reply_payload_rcv_len = 0; 1522 reply->result = ret; 1523 job->reply_len = sizeof(uint32_t); 1524 bsg_job_done(job, ret, 0); 1525 return 0; 1526 } 1527 1528 /** 1529 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests 1530 * @shost: shost for iscsi_host 1531 * @ihost: iscsi_cls_host adding the structures to 1532 */ 1533 static int 1534 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1535 { 1536 struct device *dev = &shost->shost_gendev; 1537 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1538 struct request_queue *q; 1539 char bsg_name[20]; 1540 1541 if (!i->iscsi_transport->bsg_request) 1542 return -ENOTSUPP; 1543 1544 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1545 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, 0, NULL); 1546 if (IS_ERR(q)) { 1547 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1548 "initialize - no request queue\n"); 1549 return PTR_ERR(q); 1550 } 1551 __scsi_init_queue(shost, q); 1552 1553 ihost->bsg_q = q; 1554 return 0; 1555 } 1556 1557 static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1558 struct device *cdev) 1559 { 1560 struct Scsi_Host *shost = dev_to_shost(dev); 1561 struct iscsi_cls_host *ihost = shost->shost_data; 1562 1563 memset(ihost, 0, sizeof(*ihost)); 1564 atomic_set(&ihost->nr_scans, 0); 1565 mutex_init(&ihost->mutex); 1566 1567 iscsi_bsg_host_add(shost, ihost); 1568 /* ignore any bsg add error - we just can't do sgio */ 1569 1570 return 0; 1571 } 1572 1573 static int iscsi_remove_host(struct transport_container *tc, 1574 struct device *dev, struct device *cdev) 1575 { 1576 struct Scsi_Host *shost = dev_to_shost(dev); 1577 struct iscsi_cls_host *ihost = shost->shost_data; 1578 1579 if (ihost->bsg_q) { 1580 bsg_unregister_queue(ihost->bsg_q); 1581 blk_cleanup_queue(ihost->bsg_q); 1582 } 1583 return 0; 1584 } 1585 1586 static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1587 "iscsi_host", 1588 iscsi_setup_host, 1589 iscsi_remove_host, 1590 NULL); 1591 1592 static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1593 "iscsi_session", 1594 NULL, 1595 NULL, 1596 NULL); 1597 1598 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1599 "iscsi_connection", 1600 NULL, 1601 NULL, 1602 NULL); 1603 1604 static struct sock *nls; 1605 static DEFINE_MUTEX(rx_queue_mutex); 1606 1607 static LIST_HEAD(sesslist); 1608 static DEFINE_SPINLOCK(sesslock); 1609 static LIST_HEAD(connlist); 1610 static DEFINE_SPINLOCK(connlock); 1611 1612 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1613 { 1614 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1615 return sess->sid; 1616 } 1617 1618 /* 1619 * Returns the matching session to a given sid 1620 */ 1621 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1622 { 1623 unsigned long flags; 1624 struct iscsi_cls_session *sess; 1625 1626 spin_lock_irqsave(&sesslock, flags); 1627 list_for_each_entry(sess, &sesslist, sess_list) { 1628 if (sess->sid == sid) { 1629 spin_unlock_irqrestore(&sesslock, flags); 1630 return sess; 1631 } 1632 } 1633 spin_unlock_irqrestore(&sesslock, flags); 1634 return NULL; 1635 } 1636 1637 /* 1638 * Returns the matching connection to a given sid / cid tuple 1639 */ 1640 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1641 { 1642 unsigned long flags; 1643 struct iscsi_cls_conn *conn; 1644 1645 spin_lock_irqsave(&connlock, flags); 1646 list_for_each_entry(conn, &connlist, conn_list) { 1647 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1648 spin_unlock_irqrestore(&connlock, flags); 1649 return conn; 1650 } 1651 } 1652 spin_unlock_irqrestore(&connlock, flags); 1653 return NULL; 1654 } 1655 1656 /* 1657 * The following functions can be used by LLDs that allocate 1658 * their own scsi_hosts or by software iscsi LLDs 1659 */ 1660 static struct { 1661 int value; 1662 char *name; 1663 } iscsi_session_state_names[] = { 1664 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1665 { ISCSI_SESSION_FAILED, "FAILED" }, 1666 { ISCSI_SESSION_FREE, "FREE" }, 1667 }; 1668 1669 static const char *iscsi_session_state_name(int state) 1670 { 1671 int i; 1672 char *name = NULL; 1673 1674 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1675 if (iscsi_session_state_names[i].value == state) { 1676 name = iscsi_session_state_names[i].name; 1677 break; 1678 } 1679 } 1680 return name; 1681 } 1682 1683 int iscsi_session_chkready(struct iscsi_cls_session *session) 1684 { 1685 unsigned long flags; 1686 int err; 1687 1688 spin_lock_irqsave(&session->lock, flags); 1689 switch (session->state) { 1690 case ISCSI_SESSION_LOGGED_IN: 1691 err = 0; 1692 break; 1693 case ISCSI_SESSION_FAILED: 1694 err = DID_IMM_RETRY << 16; 1695 break; 1696 case ISCSI_SESSION_FREE: 1697 err = DID_TRANSPORT_FAILFAST << 16; 1698 break; 1699 default: 1700 err = DID_NO_CONNECT << 16; 1701 break; 1702 } 1703 spin_unlock_irqrestore(&session->lock, flags); 1704 return err; 1705 } 1706 EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1707 1708 int iscsi_is_session_online(struct iscsi_cls_session *session) 1709 { 1710 unsigned long flags; 1711 int ret = 0; 1712 1713 spin_lock_irqsave(&session->lock, flags); 1714 if (session->state == ISCSI_SESSION_LOGGED_IN) 1715 ret = 1; 1716 spin_unlock_irqrestore(&session->lock, flags); 1717 return ret; 1718 } 1719 EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1720 1721 static void iscsi_session_release(struct device *dev) 1722 { 1723 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1724 struct Scsi_Host *shost; 1725 1726 shost = iscsi_session_to_shost(session); 1727 scsi_host_put(shost); 1728 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1729 kfree(session); 1730 } 1731 1732 int iscsi_is_session_dev(const struct device *dev) 1733 { 1734 return dev->release == iscsi_session_release; 1735 } 1736 EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1737 1738 static int iscsi_iter_session_fn(struct device *dev, void *data) 1739 { 1740 void (* fn) (struct iscsi_cls_session *) = data; 1741 1742 if (!iscsi_is_session_dev(dev)) 1743 return 0; 1744 fn(iscsi_dev_to_session(dev)); 1745 return 0; 1746 } 1747 1748 void iscsi_host_for_each_session(struct Scsi_Host *shost, 1749 void (*fn)(struct iscsi_cls_session *)) 1750 { 1751 device_for_each_child(&shost->shost_gendev, fn, 1752 iscsi_iter_session_fn); 1753 } 1754 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1755 1756 /** 1757 * iscsi_scan_finished - helper to report when running scans are done 1758 * @shost: scsi host 1759 * @time: scan run time 1760 * 1761 * This function can be used by drives like qla4xxx to report to the scsi 1762 * layer when the scans it kicked off at module load time are done. 1763 */ 1764 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) 1765 { 1766 struct iscsi_cls_host *ihost = shost->shost_data; 1767 /* 1768 * qla4xxx will have kicked off some session unblocks before calling 1769 * scsi_scan_host, so just wait for them to complete. 1770 */ 1771 return !atomic_read(&ihost->nr_scans); 1772 } 1773 EXPORT_SYMBOL_GPL(iscsi_scan_finished); 1774 1775 struct iscsi_scan_data { 1776 unsigned int channel; 1777 unsigned int id; 1778 u64 lun; 1779 enum scsi_scan_mode rescan; 1780 }; 1781 1782 static int iscsi_user_scan_session(struct device *dev, void *data) 1783 { 1784 struct iscsi_scan_data *scan_data = data; 1785 struct iscsi_cls_session *session; 1786 struct Scsi_Host *shost; 1787 struct iscsi_cls_host *ihost; 1788 unsigned long flags; 1789 unsigned int id; 1790 1791 if (!iscsi_is_session_dev(dev)) 1792 return 0; 1793 1794 session = iscsi_dev_to_session(dev); 1795 1796 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1797 1798 shost = iscsi_session_to_shost(session); 1799 ihost = shost->shost_data; 1800 1801 mutex_lock(&ihost->mutex); 1802 spin_lock_irqsave(&session->lock, flags); 1803 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1804 spin_unlock_irqrestore(&session->lock, flags); 1805 goto user_scan_exit; 1806 } 1807 id = session->target_id; 1808 spin_unlock_irqrestore(&session->lock, flags); 1809 1810 if (id != ISCSI_MAX_TARGET) { 1811 if ((scan_data->channel == SCAN_WILD_CARD || 1812 scan_data->channel == 0) && 1813 (scan_data->id == SCAN_WILD_CARD || 1814 scan_data->id == id)) 1815 scsi_scan_target(&session->dev, 0, id, 1816 scan_data->lun, scan_data->rescan); 1817 } 1818 1819 user_scan_exit: 1820 mutex_unlock(&ihost->mutex); 1821 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1822 return 0; 1823 } 1824 1825 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1826 uint id, u64 lun) 1827 { 1828 struct iscsi_scan_data scan_data; 1829 1830 scan_data.channel = channel; 1831 scan_data.id = id; 1832 scan_data.lun = lun; 1833 scan_data.rescan = SCSI_SCAN_MANUAL; 1834 1835 return device_for_each_child(&shost->shost_gendev, &scan_data, 1836 iscsi_user_scan_session); 1837 } 1838 1839 static void iscsi_scan_session(struct work_struct *work) 1840 { 1841 struct iscsi_cls_session *session = 1842 container_of(work, struct iscsi_cls_session, scan_work); 1843 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1844 struct iscsi_cls_host *ihost = shost->shost_data; 1845 struct iscsi_scan_data scan_data; 1846 1847 scan_data.channel = 0; 1848 scan_data.id = SCAN_WILD_CARD; 1849 scan_data.lun = SCAN_WILD_CARD; 1850 scan_data.rescan = SCSI_SCAN_RESCAN; 1851 1852 iscsi_user_scan_session(&session->dev, &scan_data); 1853 atomic_dec(&ihost->nr_scans); 1854 } 1855 1856 /** 1857 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1858 * @cmd: scsi cmd passed to scsi eh handler 1859 * 1860 * If the session is down this function will wait for the recovery 1861 * timer to fire or for the session to be logged back in. If the 1862 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1863 * should pass this error value to the scsi eh. 1864 */ 1865 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1866 { 1867 struct iscsi_cls_session *session = 1868 starget_to_session(scsi_target(cmd->device)); 1869 unsigned long flags; 1870 int ret = 0; 1871 1872 spin_lock_irqsave(&session->lock, flags); 1873 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1874 if (session->state == ISCSI_SESSION_FREE) { 1875 ret = FAST_IO_FAIL; 1876 break; 1877 } 1878 spin_unlock_irqrestore(&session->lock, flags); 1879 msleep(1000); 1880 spin_lock_irqsave(&session->lock, flags); 1881 } 1882 spin_unlock_irqrestore(&session->lock, flags); 1883 return ret; 1884 } 1885 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1886 1887 static void session_recovery_timedout(struct work_struct *work) 1888 { 1889 struct iscsi_cls_session *session = 1890 container_of(work, struct iscsi_cls_session, 1891 recovery_work.work); 1892 unsigned long flags; 1893 1894 iscsi_cls_session_printk(KERN_INFO, session, 1895 "session recovery timed out after %d secs\n", 1896 session->recovery_tmo); 1897 1898 spin_lock_irqsave(&session->lock, flags); 1899 switch (session->state) { 1900 case ISCSI_SESSION_FAILED: 1901 session->state = ISCSI_SESSION_FREE; 1902 break; 1903 case ISCSI_SESSION_LOGGED_IN: 1904 case ISCSI_SESSION_FREE: 1905 /* we raced with the unblock's flush */ 1906 spin_unlock_irqrestore(&session->lock, flags); 1907 return; 1908 } 1909 spin_unlock_irqrestore(&session->lock, flags); 1910 1911 if (session->transport->session_recovery_timedout) 1912 session->transport->session_recovery_timedout(session); 1913 1914 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1915 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1916 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1917 } 1918 1919 static void __iscsi_unblock_session(struct work_struct *work) 1920 { 1921 struct iscsi_cls_session *session = 1922 container_of(work, struct iscsi_cls_session, 1923 unblock_work); 1924 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1925 struct iscsi_cls_host *ihost = shost->shost_data; 1926 unsigned long flags; 1927 1928 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1929 /* 1930 * The recovery and unblock work get run from the same workqueue, 1931 * so try to cancel it if it was going to run after this unblock. 1932 */ 1933 cancel_delayed_work(&session->recovery_work); 1934 spin_lock_irqsave(&session->lock, flags); 1935 session->state = ISCSI_SESSION_LOGGED_IN; 1936 spin_unlock_irqrestore(&session->lock, flags); 1937 /* start IO */ 1938 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1939 /* 1940 * Only do kernel scanning if the driver is properly hooked into 1941 * the async scanning code (drivers like iscsi_tcp do login and 1942 * scanning from userspace). 1943 */ 1944 if (shost->hostt->scan_finished) { 1945 if (scsi_queue_work(shost, &session->scan_work)) 1946 atomic_inc(&ihost->nr_scans); 1947 } 1948 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1949 } 1950 1951 /** 1952 * iscsi_unblock_session - set a session as logged in and start IO. 1953 * @session: iscsi session 1954 * 1955 * Mark a session as ready to accept IO. 1956 */ 1957 void iscsi_unblock_session(struct iscsi_cls_session *session) 1958 { 1959 queue_work(iscsi_eh_timer_workq, &session->unblock_work); 1960 /* 1961 * make sure all the events have completed before tell the driver 1962 * it is safe 1963 */ 1964 flush_workqueue(iscsi_eh_timer_workq); 1965 } 1966 EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1967 1968 static void __iscsi_block_session(struct work_struct *work) 1969 { 1970 struct iscsi_cls_session *session = 1971 container_of(work, struct iscsi_cls_session, 1972 block_work); 1973 unsigned long flags; 1974 1975 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1976 spin_lock_irqsave(&session->lock, flags); 1977 session->state = ISCSI_SESSION_FAILED; 1978 spin_unlock_irqrestore(&session->lock, flags); 1979 scsi_target_block(&session->dev); 1980 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1981 if (session->recovery_tmo >= 0) 1982 queue_delayed_work(iscsi_eh_timer_workq, 1983 &session->recovery_work, 1984 session->recovery_tmo * HZ); 1985 } 1986 1987 void iscsi_block_session(struct iscsi_cls_session *session) 1988 { 1989 queue_work(iscsi_eh_timer_workq, &session->block_work); 1990 } 1991 EXPORT_SYMBOL_GPL(iscsi_block_session); 1992 1993 static void __iscsi_unbind_session(struct work_struct *work) 1994 { 1995 struct iscsi_cls_session *session = 1996 container_of(work, struct iscsi_cls_session, 1997 unbind_work); 1998 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1999 struct iscsi_cls_host *ihost = shost->shost_data; 2000 unsigned long flags; 2001 unsigned int target_id; 2002 2003 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 2004 2005 /* Prevent new scans and make sure scanning is not in progress */ 2006 mutex_lock(&ihost->mutex); 2007 spin_lock_irqsave(&session->lock, flags); 2008 if (session->target_id == ISCSI_MAX_TARGET) { 2009 spin_unlock_irqrestore(&session->lock, flags); 2010 mutex_unlock(&ihost->mutex); 2011 return; 2012 } 2013 2014 target_id = session->target_id; 2015 session->target_id = ISCSI_MAX_TARGET; 2016 spin_unlock_irqrestore(&session->lock, flags); 2017 mutex_unlock(&ihost->mutex); 2018 2019 if (session->ida_used) 2020 ida_simple_remove(&iscsi_sess_ida, target_id); 2021 2022 scsi_remove_target(&session->dev); 2023 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2024 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2025 } 2026 2027 struct iscsi_cls_session * 2028 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2029 int dd_size) 2030 { 2031 struct iscsi_cls_session *session; 2032 2033 session = kzalloc(sizeof(*session) + dd_size, 2034 GFP_KERNEL); 2035 if (!session) 2036 return NULL; 2037 2038 session->transport = transport; 2039 session->creator = -1; 2040 session->recovery_tmo = 120; 2041 session->recovery_tmo_sysfs_override = false; 2042 session->state = ISCSI_SESSION_FREE; 2043 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2044 INIT_LIST_HEAD(&session->sess_list); 2045 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2046 INIT_WORK(&session->block_work, __iscsi_block_session); 2047 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2048 INIT_WORK(&session->scan_work, iscsi_scan_session); 2049 spin_lock_init(&session->lock); 2050 2051 /* this is released in the dev's release function */ 2052 scsi_host_get(shost); 2053 session->dev.parent = &shost->shost_gendev; 2054 session->dev.release = iscsi_session_release; 2055 device_initialize(&session->dev); 2056 if (dd_size) 2057 session->dd_data = &session[1]; 2058 2059 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2060 return session; 2061 } 2062 EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2063 2064 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2065 { 2066 unsigned long flags; 2067 int id = 0; 2068 int err; 2069 2070 session->sid = atomic_add_return(1, &iscsi_session_nr); 2071 2072 if (target_id == ISCSI_MAX_TARGET) { 2073 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); 2074 2075 if (id < 0) { 2076 iscsi_cls_session_printk(KERN_ERR, session, 2077 "Failure in Target ID Allocation\n"); 2078 return id; 2079 } 2080 session->target_id = (unsigned int)id; 2081 session->ida_used = true; 2082 } else 2083 session->target_id = target_id; 2084 2085 dev_set_name(&session->dev, "session%u", session->sid); 2086 err = device_add(&session->dev); 2087 if (err) { 2088 iscsi_cls_session_printk(KERN_ERR, session, 2089 "could not register session's dev\n"); 2090 goto release_ida; 2091 } 2092 transport_register_device(&session->dev); 2093 2094 spin_lock_irqsave(&sesslock, flags); 2095 list_add(&session->sess_list, &sesslist); 2096 spin_unlock_irqrestore(&sesslock, flags); 2097 2098 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2099 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2100 return 0; 2101 2102 release_ida: 2103 if (session->ida_used) 2104 ida_simple_remove(&iscsi_sess_ida, session->target_id); 2105 2106 return err; 2107 } 2108 EXPORT_SYMBOL_GPL(iscsi_add_session); 2109 2110 /** 2111 * iscsi_create_session - create iscsi class session 2112 * @shost: scsi host 2113 * @transport: iscsi transport 2114 * @dd_size: private driver data size 2115 * @target_id: which target 2116 * 2117 * This can be called from a LLD or iscsi_transport. 2118 */ 2119 struct iscsi_cls_session * 2120 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2121 int dd_size, unsigned int target_id) 2122 { 2123 struct iscsi_cls_session *session; 2124 2125 session = iscsi_alloc_session(shost, transport, dd_size); 2126 if (!session) 2127 return NULL; 2128 2129 if (iscsi_add_session(session, target_id)) { 2130 iscsi_free_session(session); 2131 return NULL; 2132 } 2133 return session; 2134 } 2135 EXPORT_SYMBOL_GPL(iscsi_create_session); 2136 2137 static void iscsi_conn_release(struct device *dev) 2138 { 2139 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2140 struct device *parent = conn->dev.parent; 2141 2142 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2143 kfree(conn); 2144 put_device(parent); 2145 } 2146 2147 static int iscsi_is_conn_dev(const struct device *dev) 2148 { 2149 return dev->release == iscsi_conn_release; 2150 } 2151 2152 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2153 { 2154 if (!iscsi_is_conn_dev(dev)) 2155 return 0; 2156 return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); 2157 } 2158 2159 void iscsi_remove_session(struct iscsi_cls_session *session) 2160 { 2161 unsigned long flags; 2162 int err; 2163 2164 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2165 2166 spin_lock_irqsave(&sesslock, flags); 2167 list_del(&session->sess_list); 2168 spin_unlock_irqrestore(&sesslock, flags); 2169 2170 /* make sure there are no blocks/unblocks queued */ 2171 flush_workqueue(iscsi_eh_timer_workq); 2172 /* make sure the timedout callout is not running */ 2173 if (!cancel_delayed_work(&session->recovery_work)) 2174 flush_workqueue(iscsi_eh_timer_workq); 2175 /* 2176 * If we are blocked let commands flow again. The lld or iscsi 2177 * layer should set up the queuecommand to fail commands. 2178 * We assume that LLD will not be calling block/unblock while 2179 * removing the session. 2180 */ 2181 spin_lock_irqsave(&session->lock, flags); 2182 session->state = ISCSI_SESSION_FREE; 2183 spin_unlock_irqrestore(&session->lock, flags); 2184 2185 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2186 /* flush running scans then delete devices */ 2187 flush_work(&session->scan_work); 2188 __iscsi_unbind_session(&session->unbind_work); 2189 2190 /* hw iscsi may not have removed all connections from session */ 2191 err = device_for_each_child(&session->dev, NULL, 2192 iscsi_iter_destroy_conn_fn); 2193 if (err) 2194 iscsi_cls_session_printk(KERN_ERR, session, 2195 "Could not delete all connections " 2196 "for session. Error %d.\n", err); 2197 2198 transport_unregister_device(&session->dev); 2199 2200 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2201 device_del(&session->dev); 2202 } 2203 EXPORT_SYMBOL_GPL(iscsi_remove_session); 2204 2205 void iscsi_free_session(struct iscsi_cls_session *session) 2206 { 2207 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2208 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2209 put_device(&session->dev); 2210 } 2211 EXPORT_SYMBOL_GPL(iscsi_free_session); 2212 2213 /** 2214 * iscsi_create_conn - create iscsi class connection 2215 * @session: iscsi cls session 2216 * @dd_size: private driver data size 2217 * @cid: connection id 2218 * 2219 * This can be called from a LLD or iscsi_transport. The connection 2220 * is child of the session so cid must be unique for all connections 2221 * on the session. 2222 * 2223 * Since we do not support MCS, cid will normally be zero. In some cases 2224 * for software iscsi we could be trying to preallocate a connection struct 2225 * in which case there could be two connection structs and cid would be 2226 * non-zero. 2227 */ 2228 struct iscsi_cls_conn * 2229 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2230 { 2231 struct iscsi_transport *transport = session->transport; 2232 struct iscsi_cls_conn *conn; 2233 unsigned long flags; 2234 int err; 2235 2236 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2237 if (!conn) 2238 return NULL; 2239 if (dd_size) 2240 conn->dd_data = &conn[1]; 2241 2242 mutex_init(&conn->ep_mutex); 2243 INIT_LIST_HEAD(&conn->conn_list); 2244 conn->transport = transport; 2245 conn->cid = cid; 2246 2247 /* this is released in the dev's release function */ 2248 if (!get_device(&session->dev)) 2249 goto free_conn; 2250 2251 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2252 conn->dev.parent = &session->dev; 2253 conn->dev.release = iscsi_conn_release; 2254 err = device_register(&conn->dev); 2255 if (err) { 2256 iscsi_cls_session_printk(KERN_ERR, session, "could not " 2257 "register connection's dev\n"); 2258 goto release_parent_ref; 2259 } 2260 transport_register_device(&conn->dev); 2261 2262 spin_lock_irqsave(&connlock, flags); 2263 list_add(&conn->conn_list, &connlist); 2264 spin_unlock_irqrestore(&connlock, flags); 2265 2266 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); 2267 return conn; 2268 2269 release_parent_ref: 2270 put_device(&session->dev); 2271 free_conn: 2272 kfree(conn); 2273 return NULL; 2274 } 2275 2276 EXPORT_SYMBOL_GPL(iscsi_create_conn); 2277 2278 /** 2279 * iscsi_destroy_conn - destroy iscsi class connection 2280 * @conn: iscsi cls session 2281 * 2282 * This can be called from a LLD or iscsi_transport. 2283 */ 2284 int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 2285 { 2286 unsigned long flags; 2287 2288 spin_lock_irqsave(&connlock, flags); 2289 list_del(&conn->conn_list); 2290 spin_unlock_irqrestore(&connlock, flags); 2291 2292 transport_unregister_device(&conn->dev); 2293 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); 2294 device_unregister(&conn->dev); 2295 return 0; 2296 } 2297 EXPORT_SYMBOL_GPL(iscsi_destroy_conn); 2298 2299 /* 2300 * iscsi interface functions 2301 */ 2302 static struct iscsi_internal * 2303 iscsi_if_transport_lookup(struct iscsi_transport *tt) 2304 { 2305 struct iscsi_internal *priv; 2306 unsigned long flags; 2307 2308 spin_lock_irqsave(&iscsi_transport_lock, flags); 2309 list_for_each_entry(priv, &iscsi_transports, list) { 2310 if (tt == priv->iscsi_transport) { 2311 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2312 return priv; 2313 } 2314 } 2315 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2316 return NULL; 2317 } 2318 2319 static int 2320 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2321 { 2322 return nlmsg_multicast(nls, skb, 0, group, gfp); 2323 } 2324 2325 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2326 char *data, uint32_t data_size) 2327 { 2328 struct nlmsghdr *nlh; 2329 struct sk_buff *skb; 2330 struct iscsi_uevent *ev; 2331 char *pdu; 2332 struct iscsi_internal *priv; 2333 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2334 data_size); 2335 2336 priv = iscsi_if_transport_lookup(conn->transport); 2337 if (!priv) 2338 return -EINVAL; 2339 2340 skb = alloc_skb(len, GFP_ATOMIC); 2341 if (!skb) { 2342 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2343 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2344 "control PDU: OOM\n"); 2345 return -ENOMEM; 2346 } 2347 2348 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2349 ev = nlmsg_data(nlh); 2350 memset(ev, 0, sizeof(*ev)); 2351 ev->transport_handle = iscsi_handle(conn->transport); 2352 ev->type = ISCSI_KEVENT_RECV_PDU; 2353 ev->r.recv_req.cid = conn->cid; 2354 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2355 pdu = (char*)ev + sizeof(*ev); 2356 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2357 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2358 2359 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2360 } 2361 EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2362 2363 int iscsi_offload_mesg(struct Scsi_Host *shost, 2364 struct iscsi_transport *transport, uint32_t type, 2365 char *data, uint16_t data_size) 2366 { 2367 struct nlmsghdr *nlh; 2368 struct sk_buff *skb; 2369 struct iscsi_uevent *ev; 2370 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2371 2372 skb = alloc_skb(len, GFP_ATOMIC); 2373 if (!skb) { 2374 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2375 return -ENOMEM; 2376 } 2377 2378 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2379 ev = nlmsg_data(nlh); 2380 memset(ev, 0, sizeof(*ev)); 2381 ev->type = type; 2382 ev->transport_handle = iscsi_handle(transport); 2383 switch (type) { 2384 case ISCSI_KEVENT_PATH_REQ: 2385 ev->r.req_path.host_no = shost->host_no; 2386 break; 2387 case ISCSI_KEVENT_IF_DOWN: 2388 ev->r.notify_if_down.host_no = shost->host_no; 2389 break; 2390 } 2391 2392 memcpy((char *)ev + sizeof(*ev), data, data_size); 2393 2394 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2395 } 2396 EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2397 2398 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2399 { 2400 struct nlmsghdr *nlh; 2401 struct sk_buff *skb; 2402 struct iscsi_uevent *ev; 2403 struct iscsi_internal *priv; 2404 int len = nlmsg_total_size(sizeof(*ev)); 2405 2406 priv = iscsi_if_transport_lookup(conn->transport); 2407 if (!priv) 2408 return; 2409 2410 skb = alloc_skb(len, GFP_ATOMIC); 2411 if (!skb) { 2412 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2413 "conn error (%d)\n", error); 2414 return; 2415 } 2416 2417 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2418 ev = nlmsg_data(nlh); 2419 ev->transport_handle = iscsi_handle(conn->transport); 2420 ev->type = ISCSI_KEVENT_CONN_ERROR; 2421 ev->r.connerror.error = error; 2422 ev->r.connerror.cid = conn->cid; 2423 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2424 2425 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2426 2427 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2428 error); 2429 } 2430 EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2431 2432 void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2433 enum iscsi_conn_state state) 2434 { 2435 struct nlmsghdr *nlh; 2436 struct sk_buff *skb; 2437 struct iscsi_uevent *ev; 2438 struct iscsi_internal *priv; 2439 int len = nlmsg_total_size(sizeof(*ev)); 2440 2441 priv = iscsi_if_transport_lookup(conn->transport); 2442 if (!priv) 2443 return; 2444 2445 skb = alloc_skb(len, GFP_ATOMIC); 2446 if (!skb) { 2447 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2448 "conn login (%d)\n", state); 2449 return; 2450 } 2451 2452 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2453 ev = nlmsg_data(nlh); 2454 ev->transport_handle = iscsi_handle(conn->transport); 2455 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2456 ev->r.conn_login.state = state; 2457 ev->r.conn_login.cid = conn->cid; 2458 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2459 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2460 2461 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2462 state); 2463 } 2464 EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2465 2466 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2467 enum iscsi_host_event_code code, uint32_t data_size, 2468 uint8_t *data) 2469 { 2470 struct nlmsghdr *nlh; 2471 struct sk_buff *skb; 2472 struct iscsi_uevent *ev; 2473 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2474 2475 skb = alloc_skb(len, GFP_NOIO); 2476 if (!skb) { 2477 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2478 host_no, code); 2479 return; 2480 } 2481 2482 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2483 ev = nlmsg_data(nlh); 2484 ev->transport_handle = iscsi_handle(transport); 2485 ev->type = ISCSI_KEVENT_HOST_EVENT; 2486 ev->r.host_event.host_no = host_no; 2487 ev->r.host_event.code = code; 2488 ev->r.host_event.data_size = data_size; 2489 2490 if (data_size) 2491 memcpy((char *)ev + sizeof(*ev), data, data_size); 2492 2493 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2494 } 2495 EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2496 2497 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2498 uint32_t status, uint32_t pid, uint32_t data_size, 2499 uint8_t *data) 2500 { 2501 struct nlmsghdr *nlh; 2502 struct sk_buff *skb; 2503 struct iscsi_uevent *ev; 2504 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2505 2506 skb = alloc_skb(len, GFP_NOIO); 2507 if (!skb) { 2508 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2509 return; 2510 } 2511 2512 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2513 ev = nlmsg_data(nlh); 2514 ev->transport_handle = iscsi_handle(transport); 2515 ev->type = ISCSI_KEVENT_PING_COMP; 2516 ev->r.ping_comp.host_no = host_no; 2517 ev->r.ping_comp.status = status; 2518 ev->r.ping_comp.pid = pid; 2519 ev->r.ping_comp.data_size = data_size; 2520 memcpy((char *)ev + sizeof(*ev), data, data_size); 2521 2522 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2523 } 2524 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2525 2526 static int 2527 iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi, 2528 void *payload, int size) 2529 { 2530 struct sk_buff *skb; 2531 struct nlmsghdr *nlh; 2532 int len = nlmsg_total_size(size); 2533 int flags = multi ? NLM_F_MULTI : 0; 2534 int t = done ? NLMSG_DONE : type; 2535 2536 skb = alloc_skb(len, GFP_ATOMIC); 2537 if (!skb) { 2538 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2539 return -ENOMEM; 2540 } 2541 2542 nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0); 2543 nlh->nlmsg_flags = flags; 2544 memcpy(nlmsg_data(nlh), payload, size); 2545 return iscsi_multicast_skb(skb, group, GFP_ATOMIC); 2546 } 2547 2548 static int 2549 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2550 { 2551 struct iscsi_uevent *ev = nlmsg_data(nlh); 2552 struct iscsi_stats *stats; 2553 struct sk_buff *skbstat; 2554 struct iscsi_cls_conn *conn; 2555 struct nlmsghdr *nlhstat; 2556 struct iscsi_uevent *evstat; 2557 struct iscsi_internal *priv; 2558 int len = nlmsg_total_size(sizeof(*ev) + 2559 sizeof(struct iscsi_stats) + 2560 sizeof(struct iscsi_stats_custom) * 2561 ISCSI_STATS_CUSTOM_MAX); 2562 int err = 0; 2563 2564 priv = iscsi_if_transport_lookup(transport); 2565 if (!priv) 2566 return -EINVAL; 2567 2568 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2569 if (!conn) 2570 return -EEXIST; 2571 2572 do { 2573 int actual_size; 2574 2575 skbstat = alloc_skb(len, GFP_ATOMIC); 2576 if (!skbstat) { 2577 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2578 "deliver stats: OOM\n"); 2579 return -ENOMEM; 2580 } 2581 2582 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2583 (len - sizeof(*nlhstat)), 0); 2584 evstat = nlmsg_data(nlhstat); 2585 memset(evstat, 0, sizeof(*evstat)); 2586 evstat->transport_handle = iscsi_handle(conn->transport); 2587 evstat->type = nlh->nlmsg_type; 2588 evstat->u.get_stats.cid = 2589 ev->u.get_stats.cid; 2590 evstat->u.get_stats.sid = 2591 ev->u.get_stats.sid; 2592 stats = (struct iscsi_stats *) 2593 ((char*)evstat + sizeof(*evstat)); 2594 memset(stats, 0, sizeof(*stats)); 2595 2596 transport->get_stats(conn, stats); 2597 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2598 sizeof(struct iscsi_stats) + 2599 sizeof(struct iscsi_stats_custom) * 2600 stats->custom_length); 2601 actual_size -= sizeof(*nlhstat); 2602 actual_size = nlmsg_msg_size(actual_size); 2603 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2604 nlhstat->nlmsg_len = actual_size; 2605 2606 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2607 GFP_ATOMIC); 2608 } while (err < 0 && err != -ECONNREFUSED); 2609 2610 return err; 2611 } 2612 2613 /** 2614 * iscsi_session_event - send session destr. completion event 2615 * @session: iscsi class session 2616 * @event: type of event 2617 */ 2618 int iscsi_session_event(struct iscsi_cls_session *session, 2619 enum iscsi_uevent_e event) 2620 { 2621 struct iscsi_internal *priv; 2622 struct Scsi_Host *shost; 2623 struct iscsi_uevent *ev; 2624 struct sk_buff *skb; 2625 struct nlmsghdr *nlh; 2626 int rc, len = nlmsg_total_size(sizeof(*ev)); 2627 2628 priv = iscsi_if_transport_lookup(session->transport); 2629 if (!priv) 2630 return -EINVAL; 2631 shost = iscsi_session_to_shost(session); 2632 2633 skb = alloc_skb(len, GFP_KERNEL); 2634 if (!skb) { 2635 iscsi_cls_session_printk(KERN_ERR, session, 2636 "Cannot notify userspace of session " 2637 "event %u\n", event); 2638 return -ENOMEM; 2639 } 2640 2641 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2642 ev = nlmsg_data(nlh); 2643 ev->transport_handle = iscsi_handle(session->transport); 2644 2645 ev->type = event; 2646 switch (event) { 2647 case ISCSI_KEVENT_DESTROY_SESSION: 2648 ev->r.d_session.host_no = shost->host_no; 2649 ev->r.d_session.sid = session->sid; 2650 break; 2651 case ISCSI_KEVENT_CREATE_SESSION: 2652 ev->r.c_session_ret.host_no = shost->host_no; 2653 ev->r.c_session_ret.sid = session->sid; 2654 break; 2655 case ISCSI_KEVENT_UNBIND_SESSION: 2656 ev->r.unbind_session.host_no = shost->host_no; 2657 ev->r.unbind_session.sid = session->sid; 2658 break; 2659 default: 2660 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2661 "%u.\n", event); 2662 kfree_skb(skb); 2663 return -EINVAL; 2664 } 2665 2666 /* 2667 * this will occur if the daemon is not up, so we just warn 2668 * the user and when the daemon is restarted it will handle it 2669 */ 2670 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2671 if (rc == -ESRCH) 2672 iscsi_cls_session_printk(KERN_ERR, session, 2673 "Cannot notify userspace of session " 2674 "event %u. Check iscsi daemon\n", 2675 event); 2676 2677 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2678 event, rc); 2679 return rc; 2680 } 2681 EXPORT_SYMBOL_GPL(iscsi_session_event); 2682 2683 static int 2684 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2685 struct iscsi_uevent *ev, pid_t pid, 2686 uint32_t initial_cmdsn, uint16_t cmds_max, 2687 uint16_t queue_depth) 2688 { 2689 struct iscsi_transport *transport = priv->iscsi_transport; 2690 struct iscsi_cls_session *session; 2691 struct Scsi_Host *shost; 2692 2693 session = transport->create_session(ep, cmds_max, queue_depth, 2694 initial_cmdsn); 2695 if (!session) 2696 return -ENOMEM; 2697 2698 session->creator = pid; 2699 shost = iscsi_session_to_shost(session); 2700 ev->r.c_session_ret.host_no = shost->host_no; 2701 ev->r.c_session_ret.sid = session->sid; 2702 ISCSI_DBG_TRANS_SESSION(session, 2703 "Completed creating transport session\n"); 2704 return 0; 2705 } 2706 2707 static int 2708 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2709 { 2710 struct iscsi_cls_conn *conn; 2711 struct iscsi_cls_session *session; 2712 2713 session = iscsi_session_lookup(ev->u.c_conn.sid); 2714 if (!session) { 2715 printk(KERN_ERR "iscsi: invalid session %d.\n", 2716 ev->u.c_conn.sid); 2717 return -EINVAL; 2718 } 2719 2720 conn = transport->create_conn(session, ev->u.c_conn.cid); 2721 if (!conn) { 2722 iscsi_cls_session_printk(KERN_ERR, session, 2723 "couldn't create a new connection."); 2724 return -ENOMEM; 2725 } 2726 2727 ev->r.c_conn_ret.sid = session->sid; 2728 ev->r.c_conn_ret.cid = conn->cid; 2729 2730 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2731 return 0; 2732 } 2733 2734 static int 2735 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2736 { 2737 struct iscsi_cls_conn *conn; 2738 2739 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 2740 if (!conn) 2741 return -EINVAL; 2742 2743 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 2744 if (transport->destroy_conn) 2745 transport->destroy_conn(conn); 2746 2747 return 0; 2748 } 2749 2750 static int 2751 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2752 { 2753 char *data = (char*)ev + sizeof(*ev); 2754 struct iscsi_cls_conn *conn; 2755 struct iscsi_cls_session *session; 2756 int err = 0, value = 0; 2757 2758 session = iscsi_session_lookup(ev->u.set_param.sid); 2759 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 2760 if (!conn || !session) 2761 return -EINVAL; 2762 2763 switch (ev->u.set_param.param) { 2764 case ISCSI_PARAM_SESS_RECOVERY_TMO: 2765 sscanf(data, "%d", &value); 2766 if (!session->recovery_tmo_sysfs_override) 2767 session->recovery_tmo = value; 2768 break; 2769 default: 2770 err = transport->set_param(conn, ev->u.set_param.param, 2771 data, ev->u.set_param.len); 2772 } 2773 2774 return err; 2775 } 2776 2777 static int iscsi_if_ep_connect(struct iscsi_transport *transport, 2778 struct iscsi_uevent *ev, int msg_type) 2779 { 2780 struct iscsi_endpoint *ep; 2781 struct sockaddr *dst_addr; 2782 struct Scsi_Host *shost = NULL; 2783 int non_blocking, err = 0; 2784 2785 if (!transport->ep_connect) 2786 return -EINVAL; 2787 2788 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 2789 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 2790 if (!shost) { 2791 printk(KERN_ERR "ep connect failed. Could not find " 2792 "host no %u\n", 2793 ev->u.ep_connect_through_host.host_no); 2794 return -ENODEV; 2795 } 2796 non_blocking = ev->u.ep_connect_through_host.non_blocking; 2797 } else 2798 non_blocking = ev->u.ep_connect.non_blocking; 2799 2800 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2801 ep = transport->ep_connect(shost, dst_addr, non_blocking); 2802 if (IS_ERR(ep)) { 2803 err = PTR_ERR(ep); 2804 goto release_host; 2805 } 2806 2807 ev->r.ep_connect_ret.handle = ep->id; 2808 release_host: 2809 if (shost) 2810 scsi_host_put(shost); 2811 return err; 2812 } 2813 2814 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 2815 u64 ep_handle) 2816 { 2817 struct iscsi_cls_conn *conn; 2818 struct iscsi_endpoint *ep; 2819 2820 if (!transport->ep_disconnect) 2821 return -EINVAL; 2822 2823 ep = iscsi_lookup_endpoint(ep_handle); 2824 if (!ep) 2825 return -EINVAL; 2826 conn = ep->conn; 2827 if (conn) { 2828 mutex_lock(&conn->ep_mutex); 2829 conn->ep = NULL; 2830 mutex_unlock(&conn->ep_mutex); 2831 } 2832 2833 transport->ep_disconnect(ep); 2834 return 0; 2835 } 2836 2837 static int 2838 iscsi_if_transport_ep(struct iscsi_transport *transport, 2839 struct iscsi_uevent *ev, int msg_type) 2840 { 2841 struct iscsi_endpoint *ep; 2842 int rc = 0; 2843 2844 switch (msg_type) { 2845 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 2846 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 2847 rc = iscsi_if_ep_connect(transport, ev, msg_type); 2848 break; 2849 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 2850 if (!transport->ep_poll) 2851 return -EINVAL; 2852 2853 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 2854 if (!ep) 2855 return -EINVAL; 2856 2857 ev->r.retcode = transport->ep_poll(ep, 2858 ev->u.ep_poll.timeout_ms); 2859 break; 2860 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 2861 rc = iscsi_if_ep_disconnect(transport, 2862 ev->u.ep_disconnect.ep_handle); 2863 break; 2864 } 2865 return rc; 2866 } 2867 2868 static int 2869 iscsi_tgt_dscvr(struct iscsi_transport *transport, 2870 struct iscsi_uevent *ev) 2871 { 2872 struct Scsi_Host *shost; 2873 struct sockaddr *dst_addr; 2874 int err; 2875 2876 if (!transport->tgt_dscvr) 2877 return -EINVAL; 2878 2879 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 2880 if (!shost) { 2881 printk(KERN_ERR "target discovery could not find host no %u\n", 2882 ev->u.tgt_dscvr.host_no); 2883 return -ENODEV; 2884 } 2885 2886 2887 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 2888 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 2889 ev->u.tgt_dscvr.enable, dst_addr); 2890 scsi_host_put(shost); 2891 return err; 2892 } 2893 2894 static int 2895 iscsi_set_host_param(struct iscsi_transport *transport, 2896 struct iscsi_uevent *ev) 2897 { 2898 char *data = (char*)ev + sizeof(*ev); 2899 struct Scsi_Host *shost; 2900 int err; 2901 2902 if (!transport->set_host_param) 2903 return -ENOSYS; 2904 2905 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 2906 if (!shost) { 2907 printk(KERN_ERR "set_host_param could not find host no %u\n", 2908 ev->u.set_host_param.host_no); 2909 return -ENODEV; 2910 } 2911 2912 err = transport->set_host_param(shost, ev->u.set_host_param.param, 2913 data, ev->u.set_host_param.len); 2914 scsi_host_put(shost); 2915 return err; 2916 } 2917 2918 static int 2919 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2920 { 2921 struct Scsi_Host *shost; 2922 struct iscsi_path *params; 2923 int err; 2924 2925 if (!transport->set_path) 2926 return -ENOSYS; 2927 2928 shost = scsi_host_lookup(ev->u.set_path.host_no); 2929 if (!shost) { 2930 printk(KERN_ERR "set path could not find host no %u\n", 2931 ev->u.set_path.host_no); 2932 return -ENODEV; 2933 } 2934 2935 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 2936 err = transport->set_path(shost, params); 2937 2938 scsi_host_put(shost); 2939 return err; 2940 } 2941 2942 static int 2943 iscsi_set_iface_params(struct iscsi_transport *transport, 2944 struct iscsi_uevent *ev, uint32_t len) 2945 { 2946 char *data = (char *)ev + sizeof(*ev); 2947 struct Scsi_Host *shost; 2948 int err; 2949 2950 if (!transport->set_iface_param) 2951 return -ENOSYS; 2952 2953 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 2954 if (!shost) { 2955 printk(KERN_ERR "set_iface_params could not find host no %u\n", 2956 ev->u.set_iface_params.host_no); 2957 return -ENODEV; 2958 } 2959 2960 err = transport->set_iface_param(shost, data, len); 2961 scsi_host_put(shost); 2962 return err; 2963 } 2964 2965 static int 2966 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2967 { 2968 struct Scsi_Host *shost; 2969 struct sockaddr *dst_addr; 2970 int err; 2971 2972 if (!transport->send_ping) 2973 return -ENOSYS; 2974 2975 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 2976 if (!shost) { 2977 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 2978 ev->u.iscsi_ping.host_no); 2979 return -ENODEV; 2980 } 2981 2982 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 2983 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 2984 ev->u.iscsi_ping.iface_type, 2985 ev->u.iscsi_ping.payload_size, 2986 ev->u.iscsi_ping.pid, 2987 dst_addr); 2988 scsi_host_put(shost); 2989 return err; 2990 } 2991 2992 static int 2993 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2994 { 2995 struct iscsi_uevent *ev = nlmsg_data(nlh); 2996 struct Scsi_Host *shost = NULL; 2997 struct iscsi_chap_rec *chap_rec; 2998 struct iscsi_internal *priv; 2999 struct sk_buff *skbchap; 3000 struct nlmsghdr *nlhchap; 3001 struct iscsi_uevent *evchap; 3002 uint32_t chap_buf_size; 3003 int len, err = 0; 3004 char *buf; 3005 3006 if (!transport->get_chap) 3007 return -EINVAL; 3008 3009 priv = iscsi_if_transport_lookup(transport); 3010 if (!priv) 3011 return -EINVAL; 3012 3013 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3014 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3015 3016 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3017 if (!shost) { 3018 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3019 __func__, ev->u.get_chap.host_no); 3020 return -ENODEV; 3021 } 3022 3023 do { 3024 int actual_size; 3025 3026 skbchap = alloc_skb(len, GFP_KERNEL); 3027 if (!skbchap) { 3028 printk(KERN_ERR "can not deliver chap: OOM\n"); 3029 err = -ENOMEM; 3030 goto exit_get_chap; 3031 } 3032 3033 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3034 (len - sizeof(*nlhchap)), 0); 3035 evchap = nlmsg_data(nlhchap); 3036 memset(evchap, 0, sizeof(*evchap)); 3037 evchap->transport_handle = iscsi_handle(transport); 3038 evchap->type = nlh->nlmsg_type; 3039 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3040 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3041 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3042 buf = (char *)evchap + sizeof(*evchap); 3043 memset(buf, 0, chap_buf_size); 3044 3045 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3046 &evchap->u.get_chap.num_entries, buf); 3047 3048 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3049 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3050 nlhchap->nlmsg_len = actual_size; 3051 3052 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3053 GFP_KERNEL); 3054 } while (err < 0 && err != -ECONNREFUSED); 3055 3056 exit_get_chap: 3057 scsi_host_put(shost); 3058 return err; 3059 } 3060 3061 static int iscsi_set_chap(struct iscsi_transport *transport, 3062 struct iscsi_uevent *ev, uint32_t len) 3063 { 3064 char *data = (char *)ev + sizeof(*ev); 3065 struct Scsi_Host *shost; 3066 int err = 0; 3067 3068 if (!transport->set_chap) 3069 return -ENOSYS; 3070 3071 shost = scsi_host_lookup(ev->u.set_path.host_no); 3072 if (!shost) { 3073 pr_err("%s could not find host no %u\n", 3074 __func__, ev->u.set_path.host_no); 3075 return -ENODEV; 3076 } 3077 3078 err = transport->set_chap(shost, data, len); 3079 scsi_host_put(shost); 3080 return err; 3081 } 3082 3083 static int iscsi_delete_chap(struct iscsi_transport *transport, 3084 struct iscsi_uevent *ev) 3085 { 3086 struct Scsi_Host *shost; 3087 int err = 0; 3088 3089 if (!transport->delete_chap) 3090 return -ENOSYS; 3091 3092 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3093 if (!shost) { 3094 printk(KERN_ERR "%s could not find host no %u\n", 3095 __func__, ev->u.delete_chap.host_no); 3096 return -ENODEV; 3097 } 3098 3099 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3100 scsi_host_put(shost); 3101 return err; 3102 } 3103 3104 static const struct { 3105 enum iscsi_discovery_parent_type value; 3106 char *name; 3107 } iscsi_discovery_parent_names[] = { 3108 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3109 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3110 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3111 }; 3112 3113 char *iscsi_get_discovery_parent_name(int parent_type) 3114 { 3115 int i; 3116 char *state = "Unknown!"; 3117 3118 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3119 if (iscsi_discovery_parent_names[i].value & parent_type) { 3120 state = iscsi_discovery_parent_names[i].name; 3121 break; 3122 } 3123 } 3124 return state; 3125 } 3126 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3127 3128 static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3129 struct iscsi_uevent *ev, uint32_t len) 3130 { 3131 char *data = (char *)ev + sizeof(*ev); 3132 struct Scsi_Host *shost; 3133 struct iscsi_bus_flash_session *fnode_sess; 3134 struct iscsi_bus_flash_conn *fnode_conn; 3135 struct device *dev; 3136 uint32_t idx; 3137 int err = 0; 3138 3139 if (!transport->set_flashnode_param) { 3140 err = -ENOSYS; 3141 goto exit_set_fnode; 3142 } 3143 3144 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3145 if (!shost) { 3146 pr_err("%s could not find host no %u\n", 3147 __func__, ev->u.set_flashnode.host_no); 3148 err = -ENODEV; 3149 goto put_host; 3150 } 3151 3152 idx = ev->u.set_flashnode.flashnode_idx; 3153 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3154 if (!fnode_sess) { 3155 pr_err("%s could not find flashnode %u for host no %u\n", 3156 __func__, idx, ev->u.set_flashnode.host_no); 3157 err = -ENODEV; 3158 goto put_host; 3159 } 3160 3161 dev = iscsi_find_flashnode_conn(fnode_sess); 3162 if (!dev) { 3163 err = -ENODEV; 3164 goto put_sess; 3165 } 3166 3167 fnode_conn = iscsi_dev_to_flash_conn(dev); 3168 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3169 put_device(dev); 3170 3171 put_sess: 3172 put_device(&fnode_sess->dev); 3173 3174 put_host: 3175 scsi_host_put(shost); 3176 3177 exit_set_fnode: 3178 return err; 3179 } 3180 3181 static int iscsi_new_flashnode(struct iscsi_transport *transport, 3182 struct iscsi_uevent *ev, uint32_t len) 3183 { 3184 char *data = (char *)ev + sizeof(*ev); 3185 struct Scsi_Host *shost; 3186 int index; 3187 int err = 0; 3188 3189 if (!transport->new_flashnode) { 3190 err = -ENOSYS; 3191 goto exit_new_fnode; 3192 } 3193 3194 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3195 if (!shost) { 3196 pr_err("%s could not find host no %u\n", 3197 __func__, ev->u.new_flashnode.host_no); 3198 err = -ENODEV; 3199 goto put_host; 3200 } 3201 3202 index = transport->new_flashnode(shost, data, len); 3203 3204 if (index >= 0) 3205 ev->r.new_flashnode_ret.flashnode_idx = index; 3206 else 3207 err = -EIO; 3208 3209 put_host: 3210 scsi_host_put(shost); 3211 3212 exit_new_fnode: 3213 return err; 3214 } 3215 3216 static int iscsi_del_flashnode(struct iscsi_transport *transport, 3217 struct iscsi_uevent *ev) 3218 { 3219 struct Scsi_Host *shost; 3220 struct iscsi_bus_flash_session *fnode_sess; 3221 uint32_t idx; 3222 int err = 0; 3223 3224 if (!transport->del_flashnode) { 3225 err = -ENOSYS; 3226 goto exit_del_fnode; 3227 } 3228 3229 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3230 if (!shost) { 3231 pr_err("%s could not find host no %u\n", 3232 __func__, ev->u.del_flashnode.host_no); 3233 err = -ENODEV; 3234 goto put_host; 3235 } 3236 3237 idx = ev->u.del_flashnode.flashnode_idx; 3238 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3239 if (!fnode_sess) { 3240 pr_err("%s could not find flashnode %u for host no %u\n", 3241 __func__, idx, ev->u.del_flashnode.host_no); 3242 err = -ENODEV; 3243 goto put_host; 3244 } 3245 3246 err = transport->del_flashnode(fnode_sess); 3247 put_device(&fnode_sess->dev); 3248 3249 put_host: 3250 scsi_host_put(shost); 3251 3252 exit_del_fnode: 3253 return err; 3254 } 3255 3256 static int iscsi_login_flashnode(struct iscsi_transport *transport, 3257 struct iscsi_uevent *ev) 3258 { 3259 struct Scsi_Host *shost; 3260 struct iscsi_bus_flash_session *fnode_sess; 3261 struct iscsi_bus_flash_conn *fnode_conn; 3262 struct device *dev; 3263 uint32_t idx; 3264 int err = 0; 3265 3266 if (!transport->login_flashnode) { 3267 err = -ENOSYS; 3268 goto exit_login_fnode; 3269 } 3270 3271 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3272 if (!shost) { 3273 pr_err("%s could not find host no %u\n", 3274 __func__, ev->u.login_flashnode.host_no); 3275 err = -ENODEV; 3276 goto put_host; 3277 } 3278 3279 idx = ev->u.login_flashnode.flashnode_idx; 3280 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3281 if (!fnode_sess) { 3282 pr_err("%s could not find flashnode %u for host no %u\n", 3283 __func__, idx, ev->u.login_flashnode.host_no); 3284 err = -ENODEV; 3285 goto put_host; 3286 } 3287 3288 dev = iscsi_find_flashnode_conn(fnode_sess); 3289 if (!dev) { 3290 err = -ENODEV; 3291 goto put_sess; 3292 } 3293 3294 fnode_conn = iscsi_dev_to_flash_conn(dev); 3295 err = transport->login_flashnode(fnode_sess, fnode_conn); 3296 put_device(dev); 3297 3298 put_sess: 3299 put_device(&fnode_sess->dev); 3300 3301 put_host: 3302 scsi_host_put(shost); 3303 3304 exit_login_fnode: 3305 return err; 3306 } 3307 3308 static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3309 struct iscsi_uevent *ev) 3310 { 3311 struct Scsi_Host *shost; 3312 struct iscsi_bus_flash_session *fnode_sess; 3313 struct iscsi_bus_flash_conn *fnode_conn; 3314 struct device *dev; 3315 uint32_t idx; 3316 int err = 0; 3317 3318 if (!transport->logout_flashnode) { 3319 err = -ENOSYS; 3320 goto exit_logout_fnode; 3321 } 3322 3323 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3324 if (!shost) { 3325 pr_err("%s could not find host no %u\n", 3326 __func__, ev->u.logout_flashnode.host_no); 3327 err = -ENODEV; 3328 goto put_host; 3329 } 3330 3331 idx = ev->u.logout_flashnode.flashnode_idx; 3332 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3333 if (!fnode_sess) { 3334 pr_err("%s could not find flashnode %u for host no %u\n", 3335 __func__, idx, ev->u.logout_flashnode.host_no); 3336 err = -ENODEV; 3337 goto put_host; 3338 } 3339 3340 dev = iscsi_find_flashnode_conn(fnode_sess); 3341 if (!dev) { 3342 err = -ENODEV; 3343 goto put_sess; 3344 } 3345 3346 fnode_conn = iscsi_dev_to_flash_conn(dev); 3347 3348 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3349 put_device(dev); 3350 3351 put_sess: 3352 put_device(&fnode_sess->dev); 3353 3354 put_host: 3355 scsi_host_put(shost); 3356 3357 exit_logout_fnode: 3358 return err; 3359 } 3360 3361 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3362 struct iscsi_uevent *ev) 3363 { 3364 struct Scsi_Host *shost; 3365 struct iscsi_cls_session *session; 3366 int err = 0; 3367 3368 if (!transport->logout_flashnode_sid) { 3369 err = -ENOSYS; 3370 goto exit_logout_sid; 3371 } 3372 3373 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3374 if (!shost) { 3375 pr_err("%s could not find host no %u\n", 3376 __func__, ev->u.logout_flashnode.host_no); 3377 err = -ENODEV; 3378 goto put_host; 3379 } 3380 3381 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3382 if (!session) { 3383 pr_err("%s could not find session id %u\n", 3384 __func__, ev->u.logout_flashnode_sid.sid); 3385 err = -EINVAL; 3386 goto put_host; 3387 } 3388 3389 err = transport->logout_flashnode_sid(session); 3390 3391 put_host: 3392 scsi_host_put(shost); 3393 3394 exit_logout_sid: 3395 return err; 3396 } 3397 3398 static int 3399 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3400 { 3401 struct iscsi_uevent *ev = nlmsg_data(nlh); 3402 struct Scsi_Host *shost = NULL; 3403 struct iscsi_internal *priv; 3404 struct sk_buff *skbhost_stats; 3405 struct nlmsghdr *nlhhost_stats; 3406 struct iscsi_uevent *evhost_stats; 3407 int host_stats_size = 0; 3408 int len, err = 0; 3409 char *buf; 3410 3411 if (!transport->get_host_stats) 3412 return -ENOSYS; 3413 3414 priv = iscsi_if_transport_lookup(transport); 3415 if (!priv) 3416 return -EINVAL; 3417 3418 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3419 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3420 3421 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3422 if (!shost) { 3423 pr_err("%s: failed. Cound not find host no %u\n", 3424 __func__, ev->u.get_host_stats.host_no); 3425 return -ENODEV; 3426 } 3427 3428 do { 3429 int actual_size; 3430 3431 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3432 if (!skbhost_stats) { 3433 pr_err("cannot deliver host stats: OOM\n"); 3434 err = -ENOMEM; 3435 goto exit_host_stats; 3436 } 3437 3438 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3439 (len - sizeof(*nlhhost_stats)), 0); 3440 evhost_stats = nlmsg_data(nlhhost_stats); 3441 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3442 evhost_stats->transport_handle = iscsi_handle(transport); 3443 evhost_stats->type = nlh->nlmsg_type; 3444 evhost_stats->u.get_host_stats.host_no = 3445 ev->u.get_host_stats.host_no; 3446 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3447 memset(buf, 0, host_stats_size); 3448 3449 err = transport->get_host_stats(shost, buf, host_stats_size); 3450 if (err) { 3451 kfree_skb(skbhost_stats); 3452 goto exit_host_stats; 3453 } 3454 3455 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3456 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3457 nlhhost_stats->nlmsg_len = actual_size; 3458 3459 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3460 GFP_KERNEL); 3461 } while (err < 0 && err != -ECONNREFUSED); 3462 3463 exit_host_stats: 3464 scsi_host_put(shost); 3465 return err; 3466 } 3467 3468 3469 static int 3470 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3471 { 3472 int err = 0; 3473 struct iscsi_uevent *ev = nlmsg_data(nlh); 3474 struct iscsi_transport *transport = NULL; 3475 struct iscsi_internal *priv; 3476 struct iscsi_cls_session *session; 3477 struct iscsi_cls_conn *conn; 3478 struct iscsi_endpoint *ep = NULL; 3479 3480 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3481 *group = ISCSI_NL_GRP_UIP; 3482 else 3483 *group = ISCSI_NL_GRP_ISCSID; 3484 3485 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3486 if (!priv) 3487 return -EINVAL; 3488 transport = priv->iscsi_transport; 3489 3490 if (!try_module_get(transport->owner)) 3491 return -EINVAL; 3492 3493 switch (nlh->nlmsg_type) { 3494 case ISCSI_UEVENT_CREATE_SESSION: 3495 err = iscsi_if_create_session(priv, ep, ev, 3496 NETLINK_CB(skb).portid, 3497 ev->u.c_session.initial_cmdsn, 3498 ev->u.c_session.cmds_max, 3499 ev->u.c_session.queue_depth); 3500 break; 3501 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3502 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3503 if (!ep) { 3504 err = -EINVAL; 3505 break; 3506 } 3507 3508 err = iscsi_if_create_session(priv, ep, ev, 3509 NETLINK_CB(skb).portid, 3510 ev->u.c_bound_session.initial_cmdsn, 3511 ev->u.c_bound_session.cmds_max, 3512 ev->u.c_bound_session.queue_depth); 3513 break; 3514 case ISCSI_UEVENT_DESTROY_SESSION: 3515 session = iscsi_session_lookup(ev->u.d_session.sid); 3516 if (session) 3517 transport->destroy_session(session); 3518 else 3519 err = -EINVAL; 3520 break; 3521 case ISCSI_UEVENT_UNBIND_SESSION: 3522 session = iscsi_session_lookup(ev->u.d_session.sid); 3523 if (session) 3524 scsi_queue_work(iscsi_session_to_shost(session), 3525 &session->unbind_work); 3526 else 3527 err = -EINVAL; 3528 break; 3529 case ISCSI_UEVENT_CREATE_CONN: 3530 err = iscsi_if_create_conn(transport, ev); 3531 break; 3532 case ISCSI_UEVENT_DESTROY_CONN: 3533 err = iscsi_if_destroy_conn(transport, ev); 3534 break; 3535 case ISCSI_UEVENT_BIND_CONN: 3536 session = iscsi_session_lookup(ev->u.b_conn.sid); 3537 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3538 3539 if (conn && conn->ep) 3540 iscsi_if_ep_disconnect(transport, conn->ep->id); 3541 3542 if (!session || !conn) { 3543 err = -EINVAL; 3544 break; 3545 } 3546 3547 ev->r.retcode = transport->bind_conn(session, conn, 3548 ev->u.b_conn.transport_eph, 3549 ev->u.b_conn.is_leading); 3550 if (ev->r.retcode || !transport->ep_connect) 3551 break; 3552 3553 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3554 if (ep) { 3555 ep->conn = conn; 3556 3557 mutex_lock(&conn->ep_mutex); 3558 conn->ep = ep; 3559 mutex_unlock(&conn->ep_mutex); 3560 } else 3561 iscsi_cls_conn_printk(KERN_ERR, conn, 3562 "Could not set ep conn " 3563 "binding\n"); 3564 break; 3565 case ISCSI_UEVENT_SET_PARAM: 3566 err = iscsi_set_param(transport, ev); 3567 break; 3568 case ISCSI_UEVENT_START_CONN: 3569 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); 3570 if (conn) 3571 ev->r.retcode = transport->start_conn(conn); 3572 else 3573 err = -EINVAL; 3574 break; 3575 case ISCSI_UEVENT_STOP_CONN: 3576 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); 3577 if (conn) 3578 transport->stop_conn(conn, ev->u.stop_conn.flag); 3579 else 3580 err = -EINVAL; 3581 break; 3582 case ISCSI_UEVENT_SEND_PDU: 3583 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3584 if (conn) 3585 ev->r.retcode = transport->send_pdu(conn, 3586 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), 3587 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3588 ev->u.send_pdu.data_size); 3589 else 3590 err = -EINVAL; 3591 break; 3592 case ISCSI_UEVENT_GET_STATS: 3593 err = iscsi_if_get_stats(transport, nlh); 3594 break; 3595 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3596 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3597 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3598 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3599 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); 3600 break; 3601 case ISCSI_UEVENT_TGT_DSCVR: 3602 err = iscsi_tgt_dscvr(transport, ev); 3603 break; 3604 case ISCSI_UEVENT_SET_HOST_PARAM: 3605 err = iscsi_set_host_param(transport, ev); 3606 break; 3607 case ISCSI_UEVENT_PATH_UPDATE: 3608 err = iscsi_set_path(transport, ev); 3609 break; 3610 case ISCSI_UEVENT_SET_IFACE_PARAMS: 3611 err = iscsi_set_iface_params(transport, ev, 3612 nlmsg_attrlen(nlh, sizeof(*ev))); 3613 break; 3614 case ISCSI_UEVENT_PING: 3615 err = iscsi_send_ping(transport, ev); 3616 break; 3617 case ISCSI_UEVENT_GET_CHAP: 3618 err = iscsi_get_chap(transport, nlh); 3619 break; 3620 case ISCSI_UEVENT_DELETE_CHAP: 3621 err = iscsi_delete_chap(transport, ev); 3622 break; 3623 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 3624 err = iscsi_set_flashnode_param(transport, ev, 3625 nlmsg_attrlen(nlh, 3626 sizeof(*ev))); 3627 break; 3628 case ISCSI_UEVENT_NEW_FLASHNODE: 3629 err = iscsi_new_flashnode(transport, ev, 3630 nlmsg_attrlen(nlh, sizeof(*ev))); 3631 break; 3632 case ISCSI_UEVENT_DEL_FLASHNODE: 3633 err = iscsi_del_flashnode(transport, ev); 3634 break; 3635 case ISCSI_UEVENT_LOGIN_FLASHNODE: 3636 err = iscsi_login_flashnode(transport, ev); 3637 break; 3638 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 3639 err = iscsi_logout_flashnode(transport, ev); 3640 break; 3641 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 3642 err = iscsi_logout_flashnode_sid(transport, ev); 3643 break; 3644 case ISCSI_UEVENT_SET_CHAP: 3645 err = iscsi_set_chap(transport, ev, 3646 nlmsg_attrlen(nlh, sizeof(*ev))); 3647 break; 3648 case ISCSI_UEVENT_GET_HOST_STATS: 3649 err = iscsi_get_host_stats(transport, nlh); 3650 break; 3651 default: 3652 err = -ENOSYS; 3653 break; 3654 } 3655 3656 module_put(transport->owner); 3657 return err; 3658 } 3659 3660 /* 3661 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 3662 * Malformed skbs with wrong lengths or invalid creds are not processed. 3663 */ 3664 static void 3665 iscsi_if_rx(struct sk_buff *skb) 3666 { 3667 mutex_lock(&rx_queue_mutex); 3668 while (skb->len >= NLMSG_HDRLEN) { 3669 int err; 3670 uint32_t rlen; 3671 struct nlmsghdr *nlh; 3672 struct iscsi_uevent *ev; 3673 uint32_t group; 3674 3675 nlh = nlmsg_hdr(skb); 3676 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 3677 skb->len < nlh->nlmsg_len) { 3678 break; 3679 } 3680 3681 ev = nlmsg_data(nlh); 3682 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 3683 if (rlen > skb->len) 3684 rlen = skb->len; 3685 3686 err = iscsi_if_recv_msg(skb, nlh, &group); 3687 if (err) { 3688 ev->type = ISCSI_KEVENT_IF_ERROR; 3689 ev->iferror = err; 3690 } 3691 do { 3692 /* 3693 * special case for GET_STATS: 3694 * on success - sending reply and stats from 3695 * inside of if_recv_msg(), 3696 * on error - fall through. 3697 */ 3698 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 3699 break; 3700 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 3701 break; 3702 err = iscsi_if_send_reply(group, nlh->nlmsg_seq, 3703 nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); 3704 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 3705 skb_pull(skb, rlen); 3706 } 3707 mutex_unlock(&rx_queue_mutex); 3708 } 3709 3710 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 3711 struct device_attribute dev_attr_##_prefix##_##_name = \ 3712 __ATTR(_name,_mode,_show,_store) 3713 3714 /* 3715 * iSCSI connection attrs 3716 */ 3717 #define iscsi_conn_attr_show(param) \ 3718 static ssize_t \ 3719 show_conn_param_##param(struct device *dev, \ 3720 struct device_attribute *attr, char *buf) \ 3721 { \ 3722 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3723 struct iscsi_transport *t = conn->transport; \ 3724 return t->get_conn_param(conn, param, buf); \ 3725 } 3726 3727 #define iscsi_conn_attr(field, param) \ 3728 iscsi_conn_attr_show(param) \ 3729 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 3730 NULL); 3731 3732 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 3733 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 3734 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 3735 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 3736 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 3737 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 3738 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 3739 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 3740 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 3741 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 3742 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 3743 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 3744 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 3745 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 3746 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 3747 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 3748 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 3749 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 3750 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 3751 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 3752 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 3753 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 3754 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 3755 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 3756 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 3757 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 3758 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 3759 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 3760 3761 3762 #define iscsi_conn_ep_attr_show(param) \ 3763 static ssize_t show_conn_ep_param_##param(struct device *dev, \ 3764 struct device_attribute *attr,\ 3765 char *buf) \ 3766 { \ 3767 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 3768 struct iscsi_transport *t = conn->transport; \ 3769 struct iscsi_endpoint *ep; \ 3770 ssize_t rc; \ 3771 \ 3772 /* \ 3773 * Need to make sure ep_disconnect does not free the LLD's \ 3774 * interconnect resources while we are trying to read them. \ 3775 */ \ 3776 mutex_lock(&conn->ep_mutex); \ 3777 ep = conn->ep; \ 3778 if (!ep && t->ep_connect) { \ 3779 mutex_unlock(&conn->ep_mutex); \ 3780 return -ENOTCONN; \ 3781 } \ 3782 \ 3783 if (ep) \ 3784 rc = t->get_ep_param(ep, param, buf); \ 3785 else \ 3786 rc = t->get_conn_param(conn, param, buf); \ 3787 mutex_unlock(&conn->ep_mutex); \ 3788 return rc; \ 3789 } 3790 3791 #define iscsi_conn_ep_attr(field, param) \ 3792 iscsi_conn_ep_attr_show(param) \ 3793 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 3794 show_conn_ep_param_##param, NULL); 3795 3796 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 3797 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 3798 3799 static struct attribute *iscsi_conn_attrs[] = { 3800 &dev_attr_conn_max_recv_dlength.attr, 3801 &dev_attr_conn_max_xmit_dlength.attr, 3802 &dev_attr_conn_header_digest.attr, 3803 &dev_attr_conn_data_digest.attr, 3804 &dev_attr_conn_ifmarker.attr, 3805 &dev_attr_conn_ofmarker.attr, 3806 &dev_attr_conn_address.attr, 3807 &dev_attr_conn_port.attr, 3808 &dev_attr_conn_exp_statsn.attr, 3809 &dev_attr_conn_persistent_address.attr, 3810 &dev_attr_conn_persistent_port.attr, 3811 &dev_attr_conn_ping_tmo.attr, 3812 &dev_attr_conn_recv_tmo.attr, 3813 &dev_attr_conn_local_port.attr, 3814 &dev_attr_conn_statsn.attr, 3815 &dev_attr_conn_keepalive_tmo.attr, 3816 &dev_attr_conn_max_segment_size.attr, 3817 &dev_attr_conn_tcp_timestamp_stat.attr, 3818 &dev_attr_conn_tcp_wsf_disable.attr, 3819 &dev_attr_conn_tcp_nagle_disable.attr, 3820 &dev_attr_conn_tcp_timer_scale.attr, 3821 &dev_attr_conn_tcp_timestamp_enable.attr, 3822 &dev_attr_conn_fragment_disable.attr, 3823 &dev_attr_conn_ipv4_tos.attr, 3824 &dev_attr_conn_ipv6_traffic_class.attr, 3825 &dev_attr_conn_ipv6_flow_label.attr, 3826 &dev_attr_conn_is_fw_assigned_ipv6.attr, 3827 &dev_attr_conn_tcp_xmit_wsf.attr, 3828 &dev_attr_conn_tcp_recv_wsf.attr, 3829 &dev_attr_conn_local_ipaddr.attr, 3830 NULL, 3831 }; 3832 3833 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 3834 struct attribute *attr, int i) 3835 { 3836 struct device *cdev = container_of(kobj, struct device, kobj); 3837 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 3838 struct iscsi_transport *t = conn->transport; 3839 int param; 3840 3841 if (attr == &dev_attr_conn_max_recv_dlength.attr) 3842 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 3843 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 3844 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 3845 else if (attr == &dev_attr_conn_header_digest.attr) 3846 param = ISCSI_PARAM_HDRDGST_EN; 3847 else if (attr == &dev_attr_conn_data_digest.attr) 3848 param = ISCSI_PARAM_DATADGST_EN; 3849 else if (attr == &dev_attr_conn_ifmarker.attr) 3850 param = ISCSI_PARAM_IFMARKER_EN; 3851 else if (attr == &dev_attr_conn_ofmarker.attr) 3852 param = ISCSI_PARAM_OFMARKER_EN; 3853 else if (attr == &dev_attr_conn_address.attr) 3854 param = ISCSI_PARAM_CONN_ADDRESS; 3855 else if (attr == &dev_attr_conn_port.attr) 3856 param = ISCSI_PARAM_CONN_PORT; 3857 else if (attr == &dev_attr_conn_exp_statsn.attr) 3858 param = ISCSI_PARAM_EXP_STATSN; 3859 else if (attr == &dev_attr_conn_persistent_address.attr) 3860 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 3861 else if (attr == &dev_attr_conn_persistent_port.attr) 3862 param = ISCSI_PARAM_PERSISTENT_PORT; 3863 else if (attr == &dev_attr_conn_ping_tmo.attr) 3864 param = ISCSI_PARAM_PING_TMO; 3865 else if (attr == &dev_attr_conn_recv_tmo.attr) 3866 param = ISCSI_PARAM_RECV_TMO; 3867 else if (attr == &dev_attr_conn_local_port.attr) 3868 param = ISCSI_PARAM_LOCAL_PORT; 3869 else if (attr == &dev_attr_conn_statsn.attr) 3870 param = ISCSI_PARAM_STATSN; 3871 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 3872 param = ISCSI_PARAM_KEEPALIVE_TMO; 3873 else if (attr == &dev_attr_conn_max_segment_size.attr) 3874 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 3875 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 3876 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 3877 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 3878 param = ISCSI_PARAM_TCP_WSF_DISABLE; 3879 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 3880 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 3881 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 3882 param = ISCSI_PARAM_TCP_TIMER_SCALE; 3883 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 3884 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 3885 else if (attr == &dev_attr_conn_fragment_disable.attr) 3886 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 3887 else if (attr == &dev_attr_conn_ipv4_tos.attr) 3888 param = ISCSI_PARAM_IPV4_TOS; 3889 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 3890 param = ISCSI_PARAM_IPV6_TC; 3891 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 3892 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 3893 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 3894 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 3895 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 3896 param = ISCSI_PARAM_TCP_XMIT_WSF; 3897 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 3898 param = ISCSI_PARAM_TCP_RECV_WSF; 3899 else if (attr == &dev_attr_conn_local_ipaddr.attr) 3900 param = ISCSI_PARAM_LOCAL_IPADDR; 3901 else { 3902 WARN_ONCE(1, "Invalid conn attr"); 3903 return 0; 3904 } 3905 3906 return t->attr_is_visible(ISCSI_PARAM, param); 3907 } 3908 3909 static struct attribute_group iscsi_conn_group = { 3910 .attrs = iscsi_conn_attrs, 3911 .is_visible = iscsi_conn_attr_is_visible, 3912 }; 3913 3914 /* 3915 * iSCSI session attrs 3916 */ 3917 #define iscsi_session_attr_show(param, perm) \ 3918 static ssize_t \ 3919 show_session_param_##param(struct device *dev, \ 3920 struct device_attribute *attr, char *buf) \ 3921 { \ 3922 struct iscsi_cls_session *session = \ 3923 iscsi_dev_to_session(dev->parent); \ 3924 struct iscsi_transport *t = session->transport; \ 3925 \ 3926 if (perm && !capable(CAP_SYS_ADMIN)) \ 3927 return -EACCES; \ 3928 return t->get_session_param(session, param, buf); \ 3929 } 3930 3931 #define iscsi_session_attr(field, param, perm) \ 3932 iscsi_session_attr_show(param, perm) \ 3933 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 3934 NULL); 3935 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 3936 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 3937 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 3938 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 3939 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 3940 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 3941 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 3942 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 3943 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 3944 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 3945 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 3946 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 3947 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 3948 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 3949 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 3950 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 3951 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 3952 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 3953 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 3954 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 3955 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 3956 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 3957 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 3958 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 3959 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 3960 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 3961 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 3962 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 3963 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 3964 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 3965 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 3966 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 3967 iscsi_session_attr(discovery_auth_optional, 3968 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 3969 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 3970 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 3971 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 3972 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 3973 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 3974 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 3975 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 3976 3977 static ssize_t 3978 show_priv_session_state(struct device *dev, struct device_attribute *attr, 3979 char *buf) 3980 { 3981 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 3982 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); 3983 } 3984 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 3985 NULL); 3986 static ssize_t 3987 show_priv_session_creator(struct device *dev, struct device_attribute *attr, 3988 char *buf) 3989 { 3990 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 3991 return sprintf(buf, "%d\n", session->creator); 3992 } 3993 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 3994 NULL); 3995 static ssize_t 3996 show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 3997 char *buf) 3998 { 3999 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4000 return sprintf(buf, "%d\n", session->target_id); 4001 } 4002 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4003 show_priv_session_target_id, NULL); 4004 4005 #define iscsi_priv_session_attr_show(field, format) \ 4006 static ssize_t \ 4007 show_priv_session_##field(struct device *dev, \ 4008 struct device_attribute *attr, char *buf) \ 4009 { \ 4010 struct iscsi_cls_session *session = \ 4011 iscsi_dev_to_session(dev->parent); \ 4012 if (session->field == -1) \ 4013 return sprintf(buf, "off\n"); \ 4014 return sprintf(buf, format"\n", session->field); \ 4015 } 4016 4017 #define iscsi_priv_session_attr_store(field) \ 4018 static ssize_t \ 4019 store_priv_session_##field(struct device *dev, \ 4020 struct device_attribute *attr, \ 4021 const char *buf, size_t count) \ 4022 { \ 4023 int val; \ 4024 char *cp; \ 4025 struct iscsi_cls_session *session = \ 4026 iscsi_dev_to_session(dev->parent); \ 4027 if ((session->state == ISCSI_SESSION_FREE) || \ 4028 (session->state == ISCSI_SESSION_FAILED)) \ 4029 return -EBUSY; \ 4030 if (strncmp(buf, "off", 3) == 0) { \ 4031 session->field = -1; \ 4032 session->field##_sysfs_override = true; \ 4033 } else { \ 4034 val = simple_strtoul(buf, &cp, 0); \ 4035 if (*cp != '\0' && *cp != '\n') \ 4036 return -EINVAL; \ 4037 session->field = val; \ 4038 session->field##_sysfs_override = true; \ 4039 } \ 4040 return count; \ 4041 } 4042 4043 #define iscsi_priv_session_rw_attr(field, format) \ 4044 iscsi_priv_session_attr_show(field, format) \ 4045 iscsi_priv_session_attr_store(field) \ 4046 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4047 show_priv_session_##field, \ 4048 store_priv_session_##field) 4049 4050 iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4051 4052 static struct attribute *iscsi_session_attrs[] = { 4053 &dev_attr_sess_initial_r2t.attr, 4054 &dev_attr_sess_max_outstanding_r2t.attr, 4055 &dev_attr_sess_immediate_data.attr, 4056 &dev_attr_sess_first_burst_len.attr, 4057 &dev_attr_sess_max_burst_len.attr, 4058 &dev_attr_sess_data_pdu_in_order.attr, 4059 &dev_attr_sess_data_seq_in_order.attr, 4060 &dev_attr_sess_erl.attr, 4061 &dev_attr_sess_targetname.attr, 4062 &dev_attr_sess_tpgt.attr, 4063 &dev_attr_sess_password.attr, 4064 &dev_attr_sess_password_in.attr, 4065 &dev_attr_sess_username.attr, 4066 &dev_attr_sess_username_in.attr, 4067 &dev_attr_sess_fast_abort.attr, 4068 &dev_attr_sess_abort_tmo.attr, 4069 &dev_attr_sess_lu_reset_tmo.attr, 4070 &dev_attr_sess_tgt_reset_tmo.attr, 4071 &dev_attr_sess_ifacename.attr, 4072 &dev_attr_sess_initiatorname.attr, 4073 &dev_attr_sess_targetalias.attr, 4074 &dev_attr_sess_boot_root.attr, 4075 &dev_attr_sess_boot_nic.attr, 4076 &dev_attr_sess_boot_target.attr, 4077 &dev_attr_priv_sess_recovery_tmo.attr, 4078 &dev_attr_priv_sess_state.attr, 4079 &dev_attr_priv_sess_creator.attr, 4080 &dev_attr_sess_chap_out_idx.attr, 4081 &dev_attr_sess_chap_in_idx.attr, 4082 &dev_attr_priv_sess_target_id.attr, 4083 &dev_attr_sess_auto_snd_tgt_disable.attr, 4084 &dev_attr_sess_discovery_session.attr, 4085 &dev_attr_sess_portal_type.attr, 4086 &dev_attr_sess_chap_auth.attr, 4087 &dev_attr_sess_discovery_logout.attr, 4088 &dev_attr_sess_bidi_chap.attr, 4089 &dev_attr_sess_discovery_auth_optional.attr, 4090 &dev_attr_sess_def_time2wait.attr, 4091 &dev_attr_sess_def_time2retain.attr, 4092 &dev_attr_sess_isid.attr, 4093 &dev_attr_sess_tsid.attr, 4094 &dev_attr_sess_def_taskmgmt_tmo.attr, 4095 &dev_attr_sess_discovery_parent_idx.attr, 4096 &dev_attr_sess_discovery_parent_type.attr, 4097 NULL, 4098 }; 4099 4100 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4101 struct attribute *attr, int i) 4102 { 4103 struct device *cdev = container_of(kobj, struct device, kobj); 4104 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4105 struct iscsi_transport *t = session->transport; 4106 int param; 4107 4108 if (attr == &dev_attr_sess_initial_r2t.attr) 4109 param = ISCSI_PARAM_INITIAL_R2T_EN; 4110 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4111 param = ISCSI_PARAM_MAX_R2T; 4112 else if (attr == &dev_attr_sess_immediate_data.attr) 4113 param = ISCSI_PARAM_IMM_DATA_EN; 4114 else if (attr == &dev_attr_sess_first_burst_len.attr) 4115 param = ISCSI_PARAM_FIRST_BURST; 4116 else if (attr == &dev_attr_sess_max_burst_len.attr) 4117 param = ISCSI_PARAM_MAX_BURST; 4118 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4119 param = ISCSI_PARAM_PDU_INORDER_EN; 4120 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4121 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4122 else if (attr == &dev_attr_sess_erl.attr) 4123 param = ISCSI_PARAM_ERL; 4124 else if (attr == &dev_attr_sess_targetname.attr) 4125 param = ISCSI_PARAM_TARGET_NAME; 4126 else if (attr == &dev_attr_sess_tpgt.attr) 4127 param = ISCSI_PARAM_TPGT; 4128 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4129 param = ISCSI_PARAM_CHAP_IN_IDX; 4130 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4131 param = ISCSI_PARAM_CHAP_OUT_IDX; 4132 else if (attr == &dev_attr_sess_password.attr) 4133 param = ISCSI_PARAM_USERNAME; 4134 else if (attr == &dev_attr_sess_password_in.attr) 4135 param = ISCSI_PARAM_USERNAME_IN; 4136 else if (attr == &dev_attr_sess_username.attr) 4137 param = ISCSI_PARAM_PASSWORD; 4138 else if (attr == &dev_attr_sess_username_in.attr) 4139 param = ISCSI_PARAM_PASSWORD_IN; 4140 else if (attr == &dev_attr_sess_fast_abort.attr) 4141 param = ISCSI_PARAM_FAST_ABORT; 4142 else if (attr == &dev_attr_sess_abort_tmo.attr) 4143 param = ISCSI_PARAM_ABORT_TMO; 4144 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4145 param = ISCSI_PARAM_LU_RESET_TMO; 4146 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4147 param = ISCSI_PARAM_TGT_RESET_TMO; 4148 else if (attr == &dev_attr_sess_ifacename.attr) 4149 param = ISCSI_PARAM_IFACE_NAME; 4150 else if (attr == &dev_attr_sess_initiatorname.attr) 4151 param = ISCSI_PARAM_INITIATOR_NAME; 4152 else if (attr == &dev_attr_sess_targetalias.attr) 4153 param = ISCSI_PARAM_TARGET_ALIAS; 4154 else if (attr == &dev_attr_sess_boot_root.attr) 4155 param = ISCSI_PARAM_BOOT_ROOT; 4156 else if (attr == &dev_attr_sess_boot_nic.attr) 4157 param = ISCSI_PARAM_BOOT_NIC; 4158 else if (attr == &dev_attr_sess_boot_target.attr) 4159 param = ISCSI_PARAM_BOOT_TARGET; 4160 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4161 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4162 else if (attr == &dev_attr_sess_discovery_session.attr) 4163 param = ISCSI_PARAM_DISCOVERY_SESS; 4164 else if (attr == &dev_attr_sess_portal_type.attr) 4165 param = ISCSI_PARAM_PORTAL_TYPE; 4166 else if (attr == &dev_attr_sess_chap_auth.attr) 4167 param = ISCSI_PARAM_CHAP_AUTH_EN; 4168 else if (attr == &dev_attr_sess_discovery_logout.attr) 4169 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4170 else if (attr == &dev_attr_sess_bidi_chap.attr) 4171 param = ISCSI_PARAM_BIDI_CHAP_EN; 4172 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4173 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4174 else if (attr == &dev_attr_sess_def_time2wait.attr) 4175 param = ISCSI_PARAM_DEF_TIME2WAIT; 4176 else if (attr == &dev_attr_sess_def_time2retain.attr) 4177 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4178 else if (attr == &dev_attr_sess_isid.attr) 4179 param = ISCSI_PARAM_ISID; 4180 else if (attr == &dev_attr_sess_tsid.attr) 4181 param = ISCSI_PARAM_TSID; 4182 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4183 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4184 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4185 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4186 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4187 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4188 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4189 return S_IRUGO | S_IWUSR; 4190 else if (attr == &dev_attr_priv_sess_state.attr) 4191 return S_IRUGO; 4192 else if (attr == &dev_attr_priv_sess_creator.attr) 4193 return S_IRUGO; 4194 else if (attr == &dev_attr_priv_sess_target_id.attr) 4195 return S_IRUGO; 4196 else { 4197 WARN_ONCE(1, "Invalid session attr"); 4198 return 0; 4199 } 4200 4201 return t->attr_is_visible(ISCSI_PARAM, param); 4202 } 4203 4204 static struct attribute_group iscsi_session_group = { 4205 .attrs = iscsi_session_attrs, 4206 .is_visible = iscsi_session_attr_is_visible, 4207 }; 4208 4209 /* 4210 * iSCSI host attrs 4211 */ 4212 #define iscsi_host_attr_show(param) \ 4213 static ssize_t \ 4214 show_host_param_##param(struct device *dev, \ 4215 struct device_attribute *attr, char *buf) \ 4216 { \ 4217 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4218 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4219 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4220 } 4221 4222 #define iscsi_host_attr(field, param) \ 4223 iscsi_host_attr_show(param) \ 4224 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4225 NULL); 4226 4227 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4228 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4229 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4230 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4231 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4232 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4233 4234 static struct attribute *iscsi_host_attrs[] = { 4235 &dev_attr_host_netdev.attr, 4236 &dev_attr_host_hwaddress.attr, 4237 &dev_attr_host_ipaddress.attr, 4238 &dev_attr_host_initiatorname.attr, 4239 &dev_attr_host_port_state.attr, 4240 &dev_attr_host_port_speed.attr, 4241 NULL, 4242 }; 4243 4244 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4245 struct attribute *attr, int i) 4246 { 4247 struct device *cdev = container_of(kobj, struct device, kobj); 4248 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4249 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4250 int param; 4251 4252 if (attr == &dev_attr_host_netdev.attr) 4253 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4254 else if (attr == &dev_attr_host_hwaddress.attr) 4255 param = ISCSI_HOST_PARAM_HWADDRESS; 4256 else if (attr == &dev_attr_host_ipaddress.attr) 4257 param = ISCSI_HOST_PARAM_IPADDRESS; 4258 else if (attr == &dev_attr_host_initiatorname.attr) 4259 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4260 else if (attr == &dev_attr_host_port_state.attr) 4261 param = ISCSI_HOST_PARAM_PORT_STATE; 4262 else if (attr == &dev_attr_host_port_speed.attr) 4263 param = ISCSI_HOST_PARAM_PORT_SPEED; 4264 else { 4265 WARN_ONCE(1, "Invalid host attr"); 4266 return 0; 4267 } 4268 4269 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4270 } 4271 4272 static struct attribute_group iscsi_host_group = { 4273 .attrs = iscsi_host_attrs, 4274 .is_visible = iscsi_host_attr_is_visible, 4275 }; 4276 4277 /* convert iscsi_port_speed values to ascii string name */ 4278 static const struct { 4279 enum iscsi_port_speed value; 4280 char *name; 4281 } iscsi_port_speed_names[] = { 4282 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4283 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4284 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4285 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4286 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4287 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4288 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4289 }; 4290 4291 char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4292 { 4293 int i; 4294 char *speed = "Unknown!"; 4295 struct iscsi_cls_host *ihost = shost->shost_data; 4296 uint32_t port_speed = ihost->port_speed; 4297 4298 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4299 if (iscsi_port_speed_names[i].value & port_speed) { 4300 speed = iscsi_port_speed_names[i].name; 4301 break; 4302 } 4303 } 4304 return speed; 4305 } 4306 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4307 4308 /* convert iscsi_port_state values to ascii string name */ 4309 static const struct { 4310 enum iscsi_port_state value; 4311 char *name; 4312 } iscsi_port_state_names[] = { 4313 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4314 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4315 }; 4316 4317 char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4318 { 4319 int i; 4320 char *state = "Unknown!"; 4321 struct iscsi_cls_host *ihost = shost->shost_data; 4322 uint32_t port_state = ihost->port_state; 4323 4324 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4325 if (iscsi_port_state_names[i].value & port_state) { 4326 state = iscsi_port_state_names[i].name; 4327 break; 4328 } 4329 } 4330 return state; 4331 } 4332 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4333 4334 static int iscsi_session_match(struct attribute_container *cont, 4335 struct device *dev) 4336 { 4337 struct iscsi_cls_session *session; 4338 struct Scsi_Host *shost; 4339 struct iscsi_internal *priv; 4340 4341 if (!iscsi_is_session_dev(dev)) 4342 return 0; 4343 4344 session = iscsi_dev_to_session(dev); 4345 shost = iscsi_session_to_shost(session); 4346 if (!shost->transportt) 4347 return 0; 4348 4349 priv = to_iscsi_internal(shost->transportt); 4350 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4351 return 0; 4352 4353 return &priv->session_cont.ac == cont; 4354 } 4355 4356 static int iscsi_conn_match(struct attribute_container *cont, 4357 struct device *dev) 4358 { 4359 struct iscsi_cls_session *session; 4360 struct iscsi_cls_conn *conn; 4361 struct Scsi_Host *shost; 4362 struct iscsi_internal *priv; 4363 4364 if (!iscsi_is_conn_dev(dev)) 4365 return 0; 4366 4367 conn = iscsi_dev_to_conn(dev); 4368 session = iscsi_dev_to_session(conn->dev.parent); 4369 shost = iscsi_session_to_shost(session); 4370 4371 if (!shost->transportt) 4372 return 0; 4373 4374 priv = to_iscsi_internal(shost->transportt); 4375 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4376 return 0; 4377 4378 return &priv->conn_cont.ac == cont; 4379 } 4380 4381 static int iscsi_host_match(struct attribute_container *cont, 4382 struct device *dev) 4383 { 4384 struct Scsi_Host *shost; 4385 struct iscsi_internal *priv; 4386 4387 if (!scsi_is_host_device(dev)) 4388 return 0; 4389 4390 shost = dev_to_shost(dev); 4391 if (!shost->transportt || 4392 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4393 return 0; 4394 4395 priv = to_iscsi_internal(shost->transportt); 4396 return &priv->t.host_attrs.ac == cont; 4397 } 4398 4399 struct scsi_transport_template * 4400 iscsi_register_transport(struct iscsi_transport *tt) 4401 { 4402 struct iscsi_internal *priv; 4403 unsigned long flags; 4404 int err; 4405 4406 BUG_ON(!tt); 4407 4408 priv = iscsi_if_transport_lookup(tt); 4409 if (priv) 4410 return NULL; 4411 4412 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4413 if (!priv) 4414 return NULL; 4415 INIT_LIST_HEAD(&priv->list); 4416 priv->iscsi_transport = tt; 4417 priv->t.user_scan = iscsi_user_scan; 4418 priv->t.create_work_queue = 1; 4419 4420 priv->dev.class = &iscsi_transport_class; 4421 dev_set_name(&priv->dev, "%s", tt->name); 4422 err = device_register(&priv->dev); 4423 if (err) 4424 goto free_priv; 4425 4426 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4427 if (err) 4428 goto unregister_dev; 4429 4430 /* host parameters */ 4431 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4432 priv->t.host_attrs.ac.match = iscsi_host_match; 4433 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4434 priv->t.host_size = sizeof(struct iscsi_cls_host); 4435 transport_container_register(&priv->t.host_attrs); 4436 4437 /* connection parameters */ 4438 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4439 priv->conn_cont.ac.match = iscsi_conn_match; 4440 priv->conn_cont.ac.grp = &iscsi_conn_group; 4441 transport_container_register(&priv->conn_cont); 4442 4443 /* session parameters */ 4444 priv->session_cont.ac.class = &iscsi_session_class.class; 4445 priv->session_cont.ac.match = iscsi_session_match; 4446 priv->session_cont.ac.grp = &iscsi_session_group; 4447 transport_container_register(&priv->session_cont); 4448 4449 spin_lock_irqsave(&iscsi_transport_lock, flags); 4450 list_add(&priv->list, &iscsi_transports); 4451 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4452 4453 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4454 return &priv->t; 4455 4456 unregister_dev: 4457 device_unregister(&priv->dev); 4458 return NULL; 4459 free_priv: 4460 kfree(priv); 4461 return NULL; 4462 } 4463 EXPORT_SYMBOL_GPL(iscsi_register_transport); 4464 4465 int iscsi_unregister_transport(struct iscsi_transport *tt) 4466 { 4467 struct iscsi_internal *priv; 4468 unsigned long flags; 4469 4470 BUG_ON(!tt); 4471 4472 mutex_lock(&rx_queue_mutex); 4473 4474 priv = iscsi_if_transport_lookup(tt); 4475 BUG_ON (!priv); 4476 4477 spin_lock_irqsave(&iscsi_transport_lock, flags); 4478 list_del(&priv->list); 4479 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4480 4481 transport_container_unregister(&priv->conn_cont); 4482 transport_container_unregister(&priv->session_cont); 4483 transport_container_unregister(&priv->t.host_attrs); 4484 4485 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4486 device_unregister(&priv->dev); 4487 mutex_unlock(&rx_queue_mutex); 4488 4489 return 0; 4490 } 4491 EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4492 4493 static __init int iscsi_transport_init(void) 4494 { 4495 int err; 4496 struct netlink_kernel_cfg cfg = { 4497 .groups = 1, 4498 .input = iscsi_if_rx, 4499 }; 4500 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4501 ISCSI_TRANSPORT_VERSION); 4502 4503 atomic_set(&iscsi_session_nr, 0); 4504 4505 err = class_register(&iscsi_transport_class); 4506 if (err) 4507 return err; 4508 4509 err = class_register(&iscsi_endpoint_class); 4510 if (err) 4511 goto unregister_transport_class; 4512 4513 err = class_register(&iscsi_iface_class); 4514 if (err) 4515 goto unregister_endpoint_class; 4516 4517 err = transport_class_register(&iscsi_host_class); 4518 if (err) 4519 goto unregister_iface_class; 4520 4521 err = transport_class_register(&iscsi_connection_class); 4522 if (err) 4523 goto unregister_host_class; 4524 4525 err = transport_class_register(&iscsi_session_class); 4526 if (err) 4527 goto unregister_conn_class; 4528 4529 err = bus_register(&iscsi_flashnode_bus); 4530 if (err) 4531 goto unregister_session_class; 4532 4533 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 4534 if (!nls) { 4535 err = -ENOBUFS; 4536 goto unregister_flashnode_bus; 4537 } 4538 4539 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); 4540 if (!iscsi_eh_timer_workq) { 4541 err = -ENOMEM; 4542 goto release_nls; 4543 } 4544 4545 return 0; 4546 4547 release_nls: 4548 netlink_kernel_release(nls); 4549 unregister_flashnode_bus: 4550 bus_unregister(&iscsi_flashnode_bus); 4551 unregister_session_class: 4552 transport_class_unregister(&iscsi_session_class); 4553 unregister_conn_class: 4554 transport_class_unregister(&iscsi_connection_class); 4555 unregister_host_class: 4556 transport_class_unregister(&iscsi_host_class); 4557 unregister_iface_class: 4558 class_unregister(&iscsi_iface_class); 4559 unregister_endpoint_class: 4560 class_unregister(&iscsi_endpoint_class); 4561 unregister_transport_class: 4562 class_unregister(&iscsi_transport_class); 4563 return err; 4564 } 4565 4566 static void __exit iscsi_transport_exit(void) 4567 { 4568 destroy_workqueue(iscsi_eh_timer_workq); 4569 netlink_kernel_release(nls); 4570 bus_unregister(&iscsi_flashnode_bus); 4571 transport_class_unregister(&iscsi_connection_class); 4572 transport_class_unregister(&iscsi_session_class); 4573 transport_class_unregister(&iscsi_host_class); 4574 class_unregister(&iscsi_endpoint_class); 4575 class_unregister(&iscsi_iface_class); 4576 class_unregister(&iscsi_transport_class); 4577 } 4578 4579 module_init(iscsi_transport_init); 4580 module_exit(iscsi_transport_exit); 4581 4582 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 4583 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 4584 "Alex Aizman <itn780@yahoo.com>"); 4585 MODULE_DESCRIPTION("iSCSI Transport Interface"); 4586 MODULE_LICENSE("GPL"); 4587 MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 4588 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 4589