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