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