1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * iSCSI transport class definitions 4 * 5 * Copyright (C) IBM Corporation, 2004 6 * Copyright (C) Mike Christie, 2004 - 2005 7 * Copyright (C) Dmitry Yusupov, 2004 - 2005 8 * Copyright (C) Alex Aizman, 2004 - 2005 9 */ 10#include <linux/module.h> 11#include <linux/mutex.h> 12#include <linux/slab.h> 13#include <linux/bsg-lib.h> 14#include <linux/idr.h> 15#include <net/tcp.h> 16#include <scsi/scsi.h> 17#include <scsi/scsi_host.h> 18#include <scsi/scsi_device.h> 19#include <scsi/scsi_transport.h> 20#include <scsi/scsi_transport_iscsi.h> 21#include <scsi/iscsi_if.h> 22#include <scsi/scsi_cmnd.h> 23#include <scsi/scsi_bsg_iscsi.h> 24 25#define ISCSI_TRANSPORT_VERSION "2.0-870" 26 27#define ISCSI_SEND_MAX_ALLOWED 10 28 29#define CREATE_TRACE_POINTS 30#include <trace/events/iscsi.h> 31 32/* 33 * Export tracepoint symbols to be used by other modules. 34 */ 35EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn); 36EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh); 37EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session); 38EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp); 39EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp); 40 41static int dbg_session; 42module_param_named(debug_session, dbg_session, int, 43 S_IRUGO | S_IWUSR); 44MODULE_PARM_DESC(debug_session, 45 "Turn on debugging for sessions in scsi_transport_iscsi " 46 "module. Set to 1 to turn on, and zero to turn off. Default " 47 "is off."); 48 49static int dbg_conn; 50module_param_named(debug_conn, dbg_conn, int, 51 S_IRUGO | S_IWUSR); 52MODULE_PARM_DESC(debug_conn, 53 "Turn on debugging for connections in scsi_transport_iscsi " 54 "module. Set to 1 to turn on, and zero to turn off. Default " 55 "is off."); 56 57#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ 58 do { \ 59 if (dbg_session) \ 60 iscsi_cls_session_printk(KERN_INFO, _session, \ 61 "%s: " dbg_fmt, \ 62 __func__, ##arg); \ 63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \ 64 &(_session)->dev, \ 65 "%s " dbg_fmt, __func__, ##arg); \ 66 } while (0); 67 68#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ 69 do { \ 70 if (dbg_conn) \ 71 iscsi_cls_conn_printk(KERN_INFO, _conn, \ 72 "%s: " dbg_fmt, \ 73 __func__, ##arg); \ 74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \ 75 &(_conn)->dev, \ 76 "%s " dbg_fmt, __func__, ##arg); \ 77 } while (0); 78 79struct iscsi_internal { 80 struct scsi_transport_template t; 81 struct iscsi_transport *iscsi_transport; 82 struct list_head list; 83 struct device dev; 84 85 struct transport_container conn_cont; 86 struct transport_container session_cont; 87}; 88 89static DEFINE_IDR(iscsi_ep_idr); 90static DEFINE_MUTEX(iscsi_ep_idr_mutex); 91 92static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ 93 94static struct workqueue_struct *iscsi_conn_cleanup_workq; 95 96static DEFINE_IDA(iscsi_sess_ida); 97/* 98 * list of registered transports and lock that must 99 * be held while accessing list. The iscsi_transport_lock must 100 * be acquired after the rx_queue_mutex. 101 */ 102static LIST_HEAD(iscsi_transports); 103static DEFINE_SPINLOCK(iscsi_transport_lock); 104 105#define to_iscsi_internal(tmpl) \ 106 container_of(tmpl, struct iscsi_internal, t) 107 108#define dev_to_iscsi_internal(_dev) \ 109 container_of(_dev, struct iscsi_internal, dev) 110 111static void iscsi_transport_release(struct device *dev) 112{ 113 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 114 kfree(priv); 115} 116 117/* 118 * iscsi_transport_class represents the iscsi_transports that are 119 * registered. 120 */ 121static struct class iscsi_transport_class = { 122 .name = "iscsi_transport", 123 .dev_release = iscsi_transport_release, 124}; 125 126static ssize_t 127show_transport_handle(struct device *dev, struct device_attribute *attr, 128 char *buf) 129{ 130 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); 131 132 if (!capable(CAP_SYS_ADMIN)) 133 return -EACCES; 134 return sysfs_emit(buf, "%llu\n", 135 (unsigned long long)iscsi_handle(priv->iscsi_transport)); 136} 137static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); 138 139#define show_transport_attr(name, format) \ 140static ssize_t \ 141show_transport_##name(struct device *dev, \ 142 struct device_attribute *attr,char *buf) \ 143{ \ 144 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ 145 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\ 146} \ 147static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); 148 149show_transport_attr(caps, "0x%x"); 150 151static struct attribute *iscsi_transport_attrs[] = { 152 &dev_attr_handle.attr, 153 &dev_attr_caps.attr, 154 NULL, 155}; 156 157static struct attribute_group iscsi_transport_group = { 158 .attrs = iscsi_transport_attrs, 159}; 160 161/* 162 * iSCSI endpoint attrs 163 */ 164#define iscsi_dev_to_endpoint(_dev) \ 165 container_of(_dev, struct iscsi_endpoint, dev) 166 167#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ 168struct device_attribute dev_attr_##_prefix##_##_name = \ 169 __ATTR(_name,_mode,_show,_store) 170 171static void iscsi_endpoint_release(struct device *dev) 172{ 173 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 174 175 mutex_lock(&iscsi_ep_idr_mutex); 176 idr_remove(&iscsi_ep_idr, ep->id); 177 mutex_unlock(&iscsi_ep_idr_mutex); 178 179 kfree(ep); 180} 181 182static struct class iscsi_endpoint_class = { 183 .name = "iscsi_endpoint", 184 .dev_release = iscsi_endpoint_release, 185}; 186 187static ssize_t 188show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) 189{ 190 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); 191 return sysfs_emit(buf, "%d\n", ep->id); 192} 193static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); 194 195static struct attribute *iscsi_endpoint_attrs[] = { 196 &dev_attr_ep_handle.attr, 197 NULL, 198}; 199 200static struct attribute_group iscsi_endpoint_group = { 201 .attrs = iscsi_endpoint_attrs, 202}; 203 204struct iscsi_endpoint * 205iscsi_create_endpoint(int dd_size) 206{ 207 struct iscsi_endpoint *ep; 208 int err, id; 209 210 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); 211 if (!ep) 212 return NULL; 213 214 mutex_lock(&iscsi_ep_idr_mutex); 215 216 /* 217 * First endpoint id should be 1 to comply with user space 218 * applications (iscsid). 219 */ 220 id = idr_alloc(&iscsi_ep_idr, ep, 1, -1, GFP_NOIO); 221 if (id < 0) { 222 mutex_unlock(&iscsi_ep_idr_mutex); 223 printk(KERN_ERR "Could not allocate endpoint ID. Error %d.\n", 224 id); 225 goto free_ep; 226 } 227 mutex_unlock(&iscsi_ep_idr_mutex); 228 229 ep->id = id; 230 ep->dev.class = &iscsi_endpoint_class; 231 dev_set_name(&ep->dev, "ep-%d", id); 232 err = device_register(&ep->dev); 233 if (err) 234 goto put_dev; 235 236 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); 237 if (err) 238 goto unregister_dev; 239 240 if (dd_size) 241 ep->dd_data = &ep[1]; 242 return ep; 243 244unregister_dev: 245 device_unregister(&ep->dev); 246 return NULL; 247 248put_dev: 249 mutex_lock(&iscsi_ep_idr_mutex); 250 idr_remove(&iscsi_ep_idr, id); 251 mutex_unlock(&iscsi_ep_idr_mutex); 252 put_device(&ep->dev); 253 return NULL; 254free_ep: 255 kfree(ep); 256 return NULL; 257} 258EXPORT_SYMBOL_GPL(iscsi_create_endpoint); 259 260void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) 261{ 262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); 263 device_unregister(&ep->dev); 264} 265EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); 266 267void iscsi_put_endpoint(struct iscsi_endpoint *ep) 268{ 269 put_device(&ep->dev); 270} 271EXPORT_SYMBOL_GPL(iscsi_put_endpoint); 272 273/** 274 * iscsi_lookup_endpoint - get ep from handle 275 * @handle: endpoint handle 276 * 277 * Caller must do a iscsi_put_endpoint. 278 */ 279struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) 280{ 281 struct iscsi_endpoint *ep; 282 283 mutex_lock(&iscsi_ep_idr_mutex); 284 ep = idr_find(&iscsi_ep_idr, handle); 285 if (!ep) 286 goto unlock; 287 288 get_device(&ep->dev); 289unlock: 290 mutex_unlock(&iscsi_ep_idr_mutex); 291 return ep; 292} 293EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); 294 295/* 296 * Interface to display network param to sysfs 297 */ 298 299static void iscsi_iface_release(struct device *dev) 300{ 301 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 302 struct device *parent = iface->dev.parent; 303 304 kfree(iface); 305 put_device(parent); 306} 307 308 309static struct class iscsi_iface_class = { 310 .name = "iscsi_iface", 311 .dev_release = iscsi_iface_release, 312}; 313 314#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ 315struct device_attribute dev_attr_##_prefix##_##_name = \ 316 __ATTR(_name, _mode, _show, _store) 317 318/* iface attrs show */ 319#define iscsi_iface_attr_show(type, name, param_type, param) \ 320static ssize_t \ 321show_##type##_##name(struct device *dev, struct device_attribute *attr, \ 322 char *buf) \ 323{ \ 324 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ 325 struct iscsi_transport *t = iface->transport; \ 326 return t->get_iface_param(iface, param_type, param, buf); \ 327} \ 328 329#define iscsi_iface_net_attr(type, name, param) \ 330 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ 331static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 332 333#define iscsi_iface_attr(type, name, param) \ 334 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ 335static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); 336 337/* generic read only ipv4 attribute */ 338iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); 339iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); 340iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); 341iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); 342iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, 343 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); 344iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, 345 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); 346iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); 347iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); 348iscsi_iface_net_attr(ipv4_iface, grat_arp_en, 349 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); 350iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, 351 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); 352iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, 353 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); 354iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, 355 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); 356iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, 357 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); 358iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, 359 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); 360iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, 361 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); 362iscsi_iface_net_attr(ipv4_iface, fragment_disable, 363 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); 364iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, 365 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); 366iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); 367 368/* generic read only ipv6 attribute */ 369iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); 370iscsi_iface_net_attr(ipv6_iface, link_local_addr, 371 ISCSI_NET_PARAM_IPV6_LINKLOCAL); 372iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); 373iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, 374 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); 375iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, 376 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); 377iscsi_iface_net_attr(ipv6_iface, link_local_state, 378 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); 379iscsi_iface_net_attr(ipv6_iface, router_state, 380 ISCSI_NET_PARAM_IPV6_ROUTER_STATE); 381iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, 382 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); 383iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); 384iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); 385iscsi_iface_net_attr(ipv6_iface, traffic_class, 386 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); 387iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); 388iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, 389 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); 390iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, 391 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); 392iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, 393 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); 394iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, 395 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); 396iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, 397 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); 398 399/* common read only iface attribute */ 400iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); 401iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); 402iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); 403iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); 404iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); 405iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); 406iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); 407iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); 408iscsi_iface_net_attr(iface, tcp_nagle_disable, 409 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); 410iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); 411iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); 412iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); 413iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); 414iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); 415iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); 416 417/* common iscsi specific settings attributes */ 418iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); 419iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); 420iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); 421iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); 422iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); 423iscsi_iface_attr(iface, data_seq_in_order, 424 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); 425iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); 426iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); 427iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); 428iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); 429iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); 430iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); 431iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); 432iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); 433iscsi_iface_attr(iface, discovery_auth_optional, 434 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); 435iscsi_iface_attr(iface, discovery_logout, 436 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); 437iscsi_iface_attr(iface, strict_login_comp_en, 438 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); 439iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); 440 441static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, 442 struct attribute *attr, int i) 443{ 444 struct device *dev = container_of(kobj, struct device, kobj); 445 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); 446 struct iscsi_transport *t = iface->transport; 447 int param = -1; 448 449 if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) 450 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; 451 else if (attr == &dev_attr_iface_header_digest.attr) 452 param = ISCSI_IFACE_PARAM_HDRDGST_EN; 453 else if (attr == &dev_attr_iface_data_digest.attr) 454 param = ISCSI_IFACE_PARAM_DATADGST_EN; 455 else if (attr == &dev_attr_iface_immediate_data.attr) 456 param = ISCSI_IFACE_PARAM_IMM_DATA_EN; 457 else if (attr == &dev_attr_iface_initial_r2t.attr) 458 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; 459 else if (attr == &dev_attr_iface_data_seq_in_order.attr) 460 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; 461 else if (attr == &dev_attr_iface_data_pdu_in_order.attr) 462 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; 463 else if (attr == &dev_attr_iface_erl.attr) 464 param = ISCSI_IFACE_PARAM_ERL; 465 else if (attr == &dev_attr_iface_max_recv_dlength.attr) 466 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; 467 else if (attr == &dev_attr_iface_first_burst_len.attr) 468 param = ISCSI_IFACE_PARAM_FIRST_BURST; 469 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) 470 param = ISCSI_IFACE_PARAM_MAX_R2T; 471 else if (attr == &dev_attr_iface_max_burst_len.attr) 472 param = ISCSI_IFACE_PARAM_MAX_BURST; 473 else if (attr == &dev_attr_iface_chap_auth.attr) 474 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; 475 else if (attr == &dev_attr_iface_bidi_chap.attr) 476 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; 477 else if (attr == &dev_attr_iface_discovery_auth_optional.attr) 478 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; 479 else if (attr == &dev_attr_iface_discovery_logout.attr) 480 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; 481 else if (attr == &dev_attr_iface_strict_login_comp_en.attr) 482 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; 483 else if (attr == &dev_attr_iface_initiator_name.attr) 484 param = ISCSI_IFACE_PARAM_INITIATOR_NAME; 485 486 if (param != -1) 487 return t->attr_is_visible(ISCSI_IFACE_PARAM, param); 488 489 if (attr == &dev_attr_iface_enabled.attr) 490 param = ISCSI_NET_PARAM_IFACE_ENABLE; 491 else if (attr == &dev_attr_iface_vlan_id.attr) 492 param = ISCSI_NET_PARAM_VLAN_ID; 493 else if (attr == &dev_attr_iface_vlan_priority.attr) 494 param = ISCSI_NET_PARAM_VLAN_PRIORITY; 495 else if (attr == &dev_attr_iface_vlan_enabled.attr) 496 param = ISCSI_NET_PARAM_VLAN_ENABLED; 497 else if (attr == &dev_attr_iface_mtu.attr) 498 param = ISCSI_NET_PARAM_MTU; 499 else if (attr == &dev_attr_iface_port.attr) 500 param = ISCSI_NET_PARAM_PORT; 501 else if (attr == &dev_attr_iface_ipaddress_state.attr) 502 param = ISCSI_NET_PARAM_IPADDR_STATE; 503 else if (attr == &dev_attr_iface_delayed_ack_en.attr) 504 param = ISCSI_NET_PARAM_DELAYED_ACK_EN; 505 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) 506 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; 507 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) 508 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; 509 else if (attr == &dev_attr_iface_tcp_wsf.attr) 510 param = ISCSI_NET_PARAM_TCP_WSF; 511 else if (attr == &dev_attr_iface_tcp_timer_scale.attr) 512 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; 513 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) 514 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; 515 else if (attr == &dev_attr_iface_cache_id.attr) 516 param = ISCSI_NET_PARAM_CACHE_ID; 517 else if (attr == &dev_attr_iface_redirect_en.attr) 518 param = ISCSI_NET_PARAM_REDIRECT_EN; 519 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { 520 if (attr == &dev_attr_ipv4_iface_ipaddress.attr) 521 param = ISCSI_NET_PARAM_IPV4_ADDR; 522 else if (attr == &dev_attr_ipv4_iface_gateway.attr) 523 param = ISCSI_NET_PARAM_IPV4_GW; 524 else if (attr == &dev_attr_ipv4_iface_subnet.attr) 525 param = ISCSI_NET_PARAM_IPV4_SUBNET; 526 else if (attr == &dev_attr_ipv4_iface_bootproto.attr) 527 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; 528 else if (attr == 529 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) 530 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; 531 else if (attr == 532 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) 533 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; 534 else if (attr == &dev_attr_ipv4_iface_tos_en.attr) 535 param = ISCSI_NET_PARAM_IPV4_TOS_EN; 536 else if (attr == &dev_attr_ipv4_iface_tos.attr) 537 param = ISCSI_NET_PARAM_IPV4_TOS; 538 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) 539 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; 540 else if (attr == 541 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) 542 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; 543 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) 544 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; 545 else if (attr == 546 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) 547 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; 548 else if (attr == 549 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) 550 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; 551 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) 552 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; 553 else if (attr == 554 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) 555 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; 556 else if (attr == 557 &dev_attr_ipv4_iface_fragment_disable.attr) 558 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; 559 else if (attr == 560 &dev_attr_ipv4_iface_incoming_forwarding_en.attr) 561 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; 562 else if (attr == &dev_attr_ipv4_iface_ttl.attr) 563 param = ISCSI_NET_PARAM_IPV4_TTL; 564 else 565 return 0; 566 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { 567 if (attr == &dev_attr_ipv6_iface_ipaddress.attr) 568 param = ISCSI_NET_PARAM_IPV6_ADDR; 569 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) 570 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; 571 else if (attr == &dev_attr_ipv6_iface_router_addr.attr) 572 param = ISCSI_NET_PARAM_IPV6_ROUTER; 573 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) 574 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; 575 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) 576 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; 577 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) 578 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; 579 else if (attr == &dev_attr_ipv6_iface_router_state.attr) 580 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; 581 else if (attr == 582 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) 583 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; 584 else if (attr == &dev_attr_ipv6_iface_mld_en.attr) 585 param = ISCSI_NET_PARAM_IPV6_MLD_EN; 586 else if (attr == &dev_attr_ipv6_iface_flow_label.attr) 587 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; 588 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) 589 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; 590 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) 591 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; 592 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) 593 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; 594 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) 595 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; 596 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) 597 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; 598 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) 599 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; 600 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) 601 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; 602 else 603 return 0; 604 } else { 605 WARN_ONCE(1, "Invalid iface attr"); 606 return 0; 607 } 608 609 return t->attr_is_visible(ISCSI_NET_PARAM, param); 610} 611 612static struct attribute *iscsi_iface_attrs[] = { 613 &dev_attr_iface_enabled.attr, 614 &dev_attr_iface_vlan_id.attr, 615 &dev_attr_iface_vlan_priority.attr, 616 &dev_attr_iface_vlan_enabled.attr, 617 &dev_attr_ipv4_iface_ipaddress.attr, 618 &dev_attr_ipv4_iface_gateway.attr, 619 &dev_attr_ipv4_iface_subnet.attr, 620 &dev_attr_ipv4_iface_bootproto.attr, 621 &dev_attr_ipv6_iface_ipaddress.attr, 622 &dev_attr_ipv6_iface_link_local_addr.attr, 623 &dev_attr_ipv6_iface_router_addr.attr, 624 &dev_attr_ipv6_iface_ipaddr_autocfg.attr, 625 &dev_attr_ipv6_iface_link_local_autocfg.attr, 626 &dev_attr_iface_mtu.attr, 627 &dev_attr_iface_port.attr, 628 &dev_attr_iface_ipaddress_state.attr, 629 &dev_attr_iface_delayed_ack_en.attr, 630 &dev_attr_iface_tcp_nagle_disable.attr, 631 &dev_attr_iface_tcp_wsf_disable.attr, 632 &dev_attr_iface_tcp_wsf.attr, 633 &dev_attr_iface_tcp_timer_scale.attr, 634 &dev_attr_iface_tcp_timestamp_en.attr, 635 &dev_attr_iface_cache_id.attr, 636 &dev_attr_iface_redirect_en.attr, 637 &dev_attr_iface_def_taskmgmt_tmo.attr, 638 &dev_attr_iface_header_digest.attr, 639 &dev_attr_iface_data_digest.attr, 640 &dev_attr_iface_immediate_data.attr, 641 &dev_attr_iface_initial_r2t.attr, 642 &dev_attr_iface_data_seq_in_order.attr, 643 &dev_attr_iface_data_pdu_in_order.attr, 644 &dev_attr_iface_erl.attr, 645 &dev_attr_iface_max_recv_dlength.attr, 646 &dev_attr_iface_first_burst_len.attr, 647 &dev_attr_iface_max_outstanding_r2t.attr, 648 &dev_attr_iface_max_burst_len.attr, 649 &dev_attr_iface_chap_auth.attr, 650 &dev_attr_iface_bidi_chap.attr, 651 &dev_attr_iface_discovery_auth_optional.attr, 652 &dev_attr_iface_discovery_logout.attr, 653 &dev_attr_iface_strict_login_comp_en.attr, 654 &dev_attr_iface_initiator_name.attr, 655 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, 656 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, 657 &dev_attr_ipv4_iface_tos_en.attr, 658 &dev_attr_ipv4_iface_tos.attr, 659 &dev_attr_ipv4_iface_grat_arp_en.attr, 660 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, 661 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, 662 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, 663 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, 664 &dev_attr_ipv4_iface_dhcp_vendor_id.attr, 665 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, 666 &dev_attr_ipv4_iface_fragment_disable.attr, 667 &dev_attr_ipv4_iface_incoming_forwarding_en.attr, 668 &dev_attr_ipv4_iface_ttl.attr, 669 &dev_attr_ipv6_iface_link_local_state.attr, 670 &dev_attr_ipv6_iface_router_state.attr, 671 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, 672 &dev_attr_ipv6_iface_mld_en.attr, 673 &dev_attr_ipv6_iface_flow_label.attr, 674 &dev_attr_ipv6_iface_traffic_class.attr, 675 &dev_attr_ipv6_iface_hop_limit.attr, 676 &dev_attr_ipv6_iface_nd_reachable_tmo.attr, 677 &dev_attr_ipv6_iface_nd_rexmit_time.attr, 678 &dev_attr_ipv6_iface_nd_stale_tmo.attr, 679 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, 680 &dev_attr_ipv6_iface_router_adv_link_mtu.attr, 681 NULL, 682}; 683 684static struct attribute_group iscsi_iface_group = { 685 .attrs = iscsi_iface_attrs, 686 .is_visible = iscsi_iface_attr_is_visible, 687}; 688 689/* convert iscsi_ipaddress_state values to ascii string name */ 690static const struct { 691 enum iscsi_ipaddress_state value; 692 char *name; 693} iscsi_ipaddress_state_names[] = { 694 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, 695 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, 696 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, 697 {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, 698 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, 699 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, 700 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, 701}; 702 703char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) 704{ 705 int i; 706 char *state = NULL; 707 708 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { 709 if (iscsi_ipaddress_state_names[i].value == port_state) { 710 state = iscsi_ipaddress_state_names[i].name; 711 break; 712 } 713 } 714 return state; 715} 716EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); 717 718/* convert iscsi_router_state values to ascii string name */ 719static const struct { 720 enum iscsi_router_state value; 721 char *name; 722} iscsi_router_state_names[] = { 723 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, 724 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, 725 {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, 726 {ISCSI_ROUTER_STATE_STALE, "Stale" }, 727}; 728 729char *iscsi_get_router_state_name(enum iscsi_router_state router_state) 730{ 731 int i; 732 char *state = NULL; 733 734 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { 735 if (iscsi_router_state_names[i].value == router_state) { 736 state = iscsi_router_state_names[i].name; 737 break; 738 } 739 } 740 return state; 741} 742EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); 743 744struct iscsi_iface * 745iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, 746 uint32_t iface_type, uint32_t iface_num, int dd_size) 747{ 748 struct iscsi_iface *iface; 749 int err; 750 751 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); 752 if (!iface) 753 return NULL; 754 755 iface->transport = transport; 756 iface->iface_type = iface_type; 757 iface->iface_num = iface_num; 758 iface->dev.release = iscsi_iface_release; 759 iface->dev.class = &iscsi_iface_class; 760 /* parent reference released in iscsi_iface_release */ 761 iface->dev.parent = get_device(&shost->shost_gendev); 762 if (iface_type == ISCSI_IFACE_TYPE_IPV4) 763 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, 764 iface_num); 765 else 766 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, 767 iface_num); 768 769 err = device_register(&iface->dev); 770 if (err) 771 goto put_dev; 772 773 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); 774 if (err) 775 goto unreg_iface; 776 777 if (dd_size) 778 iface->dd_data = &iface[1]; 779 return iface; 780 781unreg_iface: 782 device_unregister(&iface->dev); 783 return NULL; 784 785put_dev: 786 put_device(&iface->dev); 787 return NULL; 788} 789EXPORT_SYMBOL_GPL(iscsi_create_iface); 790 791void iscsi_destroy_iface(struct iscsi_iface *iface) 792{ 793 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); 794 device_unregister(&iface->dev); 795} 796EXPORT_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) \ 803struct 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) \ 808static ssize_t \ 809show_##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) \ 821static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 822 show_##type##_##name, NULL); 823 824/* Flash node session attributes */ 825 826iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, 827 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); 828iscsi_flashnode_sess_attr(fnode, discovery_session, 829 ISCSI_FLASHNODE_DISCOVERY_SESS); 830iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); 831iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); 832iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); 833iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); 834iscsi_flashnode_sess_attr(fnode, data_seq_in_order, 835 ISCSI_FLASHNODE_DATASEQ_INORDER); 836iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, 837 ISCSI_FLASHNODE_PDU_INORDER); 838iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); 839iscsi_flashnode_sess_attr(fnode, discovery_logout, 840 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); 841iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); 842iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, 843 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); 844iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); 845iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); 846iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); 847iscsi_flashnode_sess_attr(fnode, def_time2retain, 848 ISCSI_FLASHNODE_DEF_TIME2RETAIN); 849iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); 850iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); 851iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); 852iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); 853iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, 854 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); 855iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); 856iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); 857iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); 858iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, 859 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); 860iscsi_flashnode_sess_attr(fnode, discovery_parent_type, 861 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); 862iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); 863iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); 864iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); 865iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); 866iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); 867iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); 868iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); 869 870static 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 907static 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 991static 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 996static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { 997 &iscsi_flashnode_sess_attr_group, 998 NULL, 999}; 1000 1001static 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 1012static const struct device_type iscsi_flashnode_sess_dev_type = { 1013 .name = "iscsi_flashnode_sess_dev_type", 1014 .groups = iscsi_flashnode_sess_attr_groups, 1015 .release = iscsi_flashnode_sess_release, 1016}; 1017 1018/* flash node connection attrs show */ 1019#define iscsi_flashnode_conn_attr_show(type, name, param) \ 1020static ssize_t \ 1021show_##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) \ 1034static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ 1035 show_##type##_##name, NULL); 1036 1037/* Flash node connection attributes */ 1038 1039iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, 1040 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); 1041iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); 1042iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); 1043iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); 1044iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, 1045 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); 1046iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, 1047 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); 1048iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, 1049 ISCSI_FLASHNODE_TCP_WSF_DISABLE); 1050iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, 1051 ISCSI_FLASHNODE_TCP_TIMER_SCALE); 1052iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, 1053 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); 1054iscsi_flashnode_conn_attr(fnode, fragment_disable, 1055 ISCSI_FLASHNODE_IP_FRAG_DISABLE); 1056iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); 1057iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); 1058iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); 1059iscsi_flashnode_conn_attr(fnode, max_recv_dlength, 1060 ISCSI_FLASHNODE_MAX_RECV_DLENGTH); 1061iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, 1062 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); 1063iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); 1064iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); 1065iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); 1066iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, 1067 ISCSI_FLASHNODE_IPV6_FLOW_LABEL); 1068iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, 1069 ISCSI_FLASHNODE_REDIRECT_IPADDR); 1070iscsi_flashnode_conn_attr(fnode, max_segment_size, 1071 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); 1072iscsi_flashnode_conn_attr(fnode, link_local_ipv6, 1073 ISCSI_FLASHNODE_LINK_LOCAL_IPV6); 1074iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); 1075iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); 1076iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); 1077iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); 1078 1079static 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 1109static 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 1178static 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 1183static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { 1184 &iscsi_flashnode_conn_attr_group, 1185 NULL, 1186}; 1187 1188static 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 1198static const struct device_type iscsi_flashnode_conn_dev_type = { 1199 .name = "iscsi_flashnode_conn_dev_type", 1200 .groups = iscsi_flashnode_conn_attr_groups, 1201 .release = iscsi_flashnode_conn_release, 1202}; 1203 1204static const struct bus_type iscsi_flashnode_bus; 1205 1206int 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} 1213EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); 1214 1215static const 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 */ 1233struct iscsi_bus_flash_session * 1234iscsi_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 put_dev; 1256 1257 if (dd_size) 1258 fnode_sess->dd_data = &fnode_sess[1]; 1259 1260 return fnode_sess; 1261 1262put_dev: 1263 put_device(&fnode_sess->dev); 1264 return NULL; 1265} 1266EXPORT_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 */ 1281struct iscsi_bus_flash_conn * 1282iscsi_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 put_dev; 1304 1305 if (dd_size) 1306 fnode_conn->dd_data = &fnode_conn[1]; 1307 1308 return fnode_conn; 1309 1310put_dev: 1311 put_device(&fnode_conn->dev); 1312 return NULL; 1313} 1314EXPORT_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 */ 1327static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) 1328{ 1329 return dev->bus == &iscsi_flashnode_bus; 1330} 1331 1332static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) 1333{ 1334 device_unregister(&fnode_conn->dev); 1335 return 0; 1336} 1337 1338static 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 1349exit_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 */ 1364static struct iscsi_bus_flash_session * 1365iscsi_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 */ 1391struct device * 1392iscsi_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} 1397EXPORT_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 */ 1410struct device * 1411iscsi_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} 1416EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); 1417 1418static 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 */ 1433void 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} 1445EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); 1446 1447static 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 */ 1463void 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} 1468EXPORT_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 */ 1477static 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 1518fail_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 */ 1533static int 1534iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) 1535{ 1536 struct device *dev = &shost->shost_gendev; 1537 struct iscsi_internal *i = to_iscsi_internal(shost->transportt); 1538 struct request_queue *q; 1539 char bsg_name[20]; 1540 1541 if (!i->iscsi_transport->bsg_request) 1542 return -ENOTSUPP; 1543 1544 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); 1545 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); 1546 if (IS_ERR(q)) { 1547 shost_printk(KERN_ERR, shost, "bsg interface failed to " 1548 "initialize - no request queue\n"); 1549 return PTR_ERR(q); 1550 } 1551 __scsi_init_queue(shost, q); 1552 1553 ihost->bsg_q = q; 1554 return 0; 1555} 1556 1557static int iscsi_setup_host(struct transport_container *tc, struct device *dev, 1558 struct device *cdev) 1559{ 1560 struct Scsi_Host *shost = dev_to_shost(dev); 1561 struct iscsi_cls_host *ihost = shost->shost_data; 1562 1563 memset(ihost, 0, sizeof(*ihost)); 1564 mutex_init(&ihost->mutex); 1565 1566 iscsi_bsg_host_add(shost, ihost); 1567 /* ignore any bsg add error - we just can't do sgio */ 1568 1569 return 0; 1570} 1571 1572static int iscsi_remove_host(struct transport_container *tc, 1573 struct device *dev, struct device *cdev) 1574{ 1575 struct Scsi_Host *shost = dev_to_shost(dev); 1576 struct iscsi_cls_host *ihost = shost->shost_data; 1577 1578 bsg_remove_queue(ihost->bsg_q); 1579 return 0; 1580} 1581 1582static DECLARE_TRANSPORT_CLASS(iscsi_host_class, 1583 "iscsi_host", 1584 iscsi_setup_host, 1585 iscsi_remove_host, 1586 NULL); 1587 1588static DECLARE_TRANSPORT_CLASS(iscsi_session_class, 1589 "iscsi_session", 1590 NULL, 1591 NULL, 1592 NULL); 1593 1594static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, 1595 "iscsi_connection", 1596 NULL, 1597 NULL, 1598 NULL); 1599 1600static struct sock *nls; 1601static DEFINE_MUTEX(rx_queue_mutex); 1602 1603static LIST_HEAD(sesslist); 1604static DEFINE_SPINLOCK(sesslock); 1605static LIST_HEAD(connlist); 1606static LIST_HEAD(connlist_err); 1607static DEFINE_SPINLOCK(connlock); 1608 1609static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) 1610{ 1611 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); 1612 return sess->sid; 1613} 1614 1615/* 1616 * Returns the matching session to a given sid 1617 */ 1618static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) 1619{ 1620 unsigned long flags; 1621 struct iscsi_cls_session *sess; 1622 1623 spin_lock_irqsave(&sesslock, flags); 1624 list_for_each_entry(sess, &sesslist, sess_list) { 1625 if (sess->sid == sid) { 1626 spin_unlock_irqrestore(&sesslock, flags); 1627 return sess; 1628 } 1629 } 1630 spin_unlock_irqrestore(&sesslock, flags); 1631 return NULL; 1632} 1633 1634/* 1635 * Returns the matching connection to a given sid / cid tuple 1636 */ 1637static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) 1638{ 1639 unsigned long flags; 1640 struct iscsi_cls_conn *conn; 1641 1642 spin_lock_irqsave(&connlock, flags); 1643 list_for_each_entry(conn, &connlist, conn_list) { 1644 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { 1645 spin_unlock_irqrestore(&connlock, flags); 1646 return conn; 1647 } 1648 } 1649 spin_unlock_irqrestore(&connlock, flags); 1650 return NULL; 1651} 1652 1653/* 1654 * The following functions can be used by LLDs that allocate 1655 * their own scsi_hosts or by software iscsi LLDs 1656 */ 1657static struct { 1658 int value; 1659 char *name; 1660} iscsi_session_state_names[] = { 1661 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, 1662 { ISCSI_SESSION_FAILED, "FAILED" }, 1663 { ISCSI_SESSION_FREE, "FREE" }, 1664}; 1665 1666static const char *iscsi_session_state_name(int state) 1667{ 1668 int i; 1669 char *name = NULL; 1670 1671 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { 1672 if (iscsi_session_state_names[i].value == state) { 1673 name = iscsi_session_state_names[i].name; 1674 break; 1675 } 1676 } 1677 return name; 1678} 1679 1680static char *iscsi_session_target_state_name[] = { 1681 [ISCSI_SESSION_TARGET_UNBOUND] = "UNBOUND", 1682 [ISCSI_SESSION_TARGET_ALLOCATED] = "ALLOCATED", 1683 [ISCSI_SESSION_TARGET_SCANNED] = "SCANNED", 1684 [ISCSI_SESSION_TARGET_UNBINDING] = "UNBINDING", 1685}; 1686 1687int iscsi_session_chkready(struct iscsi_cls_session *session) 1688{ 1689 int err; 1690 1691 switch (session->state) { 1692 case ISCSI_SESSION_LOGGED_IN: 1693 err = 0; 1694 break; 1695 case ISCSI_SESSION_FAILED: 1696 err = DID_IMM_RETRY << 16; 1697 break; 1698 case ISCSI_SESSION_FREE: 1699 err = DID_TRANSPORT_FAILFAST << 16; 1700 break; 1701 default: 1702 err = DID_NO_CONNECT << 16; 1703 break; 1704 } 1705 return err; 1706} 1707EXPORT_SYMBOL_GPL(iscsi_session_chkready); 1708 1709int iscsi_is_session_online(struct iscsi_cls_session *session) 1710{ 1711 unsigned long flags; 1712 int ret = 0; 1713 1714 spin_lock_irqsave(&session->lock, flags); 1715 if (session->state == ISCSI_SESSION_LOGGED_IN) 1716 ret = 1; 1717 spin_unlock_irqrestore(&session->lock, flags); 1718 return ret; 1719} 1720EXPORT_SYMBOL_GPL(iscsi_is_session_online); 1721 1722static void iscsi_session_release(struct device *dev) 1723{ 1724 struct iscsi_cls_session *session = iscsi_dev_to_session(dev); 1725 struct Scsi_Host *shost; 1726 1727 shost = iscsi_session_to_shost(session); 1728 scsi_host_put(shost); 1729 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); 1730 kfree(session); 1731} 1732 1733int iscsi_is_session_dev(const struct device *dev) 1734{ 1735 return dev->release == iscsi_session_release; 1736} 1737EXPORT_SYMBOL_GPL(iscsi_is_session_dev); 1738 1739static int iscsi_iter_session_fn(struct device *dev, void *data) 1740{ 1741 void (* fn) (struct iscsi_cls_session *) = data; 1742 1743 if (!iscsi_is_session_dev(dev)) 1744 return 0; 1745 fn(iscsi_dev_to_session(dev)); 1746 return 0; 1747} 1748 1749void iscsi_host_for_each_session(struct Scsi_Host *shost, 1750 void (*fn)(struct iscsi_cls_session *)) 1751{ 1752 device_for_each_child(&shost->shost_gendev, fn, 1753 iscsi_iter_session_fn); 1754} 1755EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); 1756 1757struct iscsi_scan_data { 1758 unsigned int channel; 1759 unsigned int id; 1760 u64 lun; 1761 enum scsi_scan_mode rescan; 1762}; 1763 1764static int iscsi_user_scan_session(struct device *dev, void *data) 1765{ 1766 struct iscsi_scan_data *scan_data = data; 1767 struct iscsi_cls_session *session; 1768 struct Scsi_Host *shost; 1769 struct iscsi_cls_host *ihost; 1770 unsigned long flags; 1771 unsigned int id; 1772 1773 if (!iscsi_is_session_dev(dev)) 1774 return 0; 1775 1776 session = iscsi_dev_to_session(dev); 1777 1778 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); 1779 1780 shost = iscsi_session_to_shost(session); 1781 ihost = shost->shost_data; 1782 1783 mutex_lock(&ihost->mutex); 1784 spin_lock_irqsave(&session->lock, flags); 1785 if (session->state != ISCSI_SESSION_LOGGED_IN) { 1786 spin_unlock_irqrestore(&session->lock, flags); 1787 goto user_scan_exit; 1788 } 1789 id = session->target_id; 1790 spin_unlock_irqrestore(&session->lock, flags); 1791 1792 if (id != ISCSI_MAX_TARGET) { 1793 if ((scan_data->channel == SCAN_WILD_CARD || 1794 scan_data->channel == 0) && 1795 (scan_data->id == SCAN_WILD_CARD || 1796 scan_data->id == id)) { 1797 scsi_scan_target(&session->dev, 0, id, 1798 scan_data->lun, scan_data->rescan); 1799 spin_lock_irqsave(&session->lock, flags); 1800 session->target_state = ISCSI_SESSION_TARGET_SCANNED; 1801 spin_unlock_irqrestore(&session->lock, flags); 1802 } 1803 } 1804 1805user_scan_exit: 1806 mutex_unlock(&ihost->mutex); 1807 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); 1808 return 0; 1809} 1810 1811static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, 1812 uint id, u64 lun) 1813{ 1814 struct iscsi_scan_data scan_data; 1815 1816 scan_data.channel = channel; 1817 scan_data.id = id; 1818 scan_data.lun = lun; 1819 scan_data.rescan = SCSI_SCAN_MANUAL; 1820 1821 return device_for_each_child(&shost->shost_gendev, &scan_data, 1822 iscsi_user_scan_session); 1823} 1824 1825static void iscsi_scan_session(struct work_struct *work) 1826{ 1827 struct iscsi_cls_session *session = 1828 container_of(work, struct iscsi_cls_session, scan_work); 1829 struct iscsi_scan_data scan_data; 1830 1831 scan_data.channel = 0; 1832 scan_data.id = SCAN_WILD_CARD; 1833 scan_data.lun = SCAN_WILD_CARD; 1834 scan_data.rescan = SCSI_SCAN_RESCAN; 1835 1836 iscsi_user_scan_session(&session->dev, &scan_data); 1837} 1838 1839/** 1840 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned 1841 * @cmd: scsi cmd passed to scsi eh handler 1842 * 1843 * If the session is down this function will wait for the recovery 1844 * timer to fire or for the session to be logged back in. If the 1845 * recovery timer fires then FAST_IO_FAIL is returned. The caller 1846 * should pass this error value to the scsi eh. 1847 */ 1848int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) 1849{ 1850 struct iscsi_cls_session *session = 1851 starget_to_session(scsi_target(cmd->device)); 1852 unsigned long flags; 1853 int ret = 0; 1854 1855 spin_lock_irqsave(&session->lock, flags); 1856 while (session->state != ISCSI_SESSION_LOGGED_IN) { 1857 if (session->state == ISCSI_SESSION_FREE) { 1858 ret = FAST_IO_FAIL; 1859 break; 1860 } 1861 spin_unlock_irqrestore(&session->lock, flags); 1862 msleep(1000); 1863 spin_lock_irqsave(&session->lock, flags); 1864 } 1865 spin_unlock_irqrestore(&session->lock, flags); 1866 return ret; 1867} 1868EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); 1869 1870static void session_recovery_timedout(struct work_struct *work) 1871{ 1872 struct iscsi_cls_session *session = 1873 container_of(work, struct iscsi_cls_session, 1874 recovery_work.work); 1875 unsigned long flags; 1876 1877 iscsi_cls_session_printk(KERN_INFO, session, 1878 "session recovery timed out after %d secs\n", 1879 session->recovery_tmo); 1880 1881 spin_lock_irqsave(&session->lock, flags); 1882 switch (session->state) { 1883 case ISCSI_SESSION_FAILED: 1884 session->state = ISCSI_SESSION_FREE; 1885 break; 1886 case ISCSI_SESSION_LOGGED_IN: 1887 case ISCSI_SESSION_FREE: 1888 /* we raced with the unblock's flush */ 1889 spin_unlock_irqrestore(&session->lock, flags); 1890 return; 1891 } 1892 spin_unlock_irqrestore(&session->lock, flags); 1893 1894 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); 1895 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 1896 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); 1897 1898 if (session->transport->session_recovery_timedout) 1899 session->transport->session_recovery_timedout(session); 1900} 1901 1902static void __iscsi_unblock_session(struct work_struct *work) 1903{ 1904 struct iscsi_cls_session *session = 1905 container_of(work, struct iscsi_cls_session, 1906 unblock_work); 1907 unsigned long flags; 1908 1909 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); 1910 1911 cancel_delayed_work_sync(&session->recovery_work); 1912 spin_lock_irqsave(&session->lock, flags); 1913 session->state = ISCSI_SESSION_LOGGED_IN; 1914 spin_unlock_irqrestore(&session->lock, flags); 1915 /* start IO */ 1916 scsi_target_unblock(&session->dev, SDEV_RUNNING); 1917 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); 1918} 1919 1920/** 1921 * iscsi_unblock_session - set a session as logged in and start IO. 1922 * @session: iscsi session 1923 * 1924 * Mark a session as ready to accept IO. 1925 */ 1926void iscsi_unblock_session(struct iscsi_cls_session *session) 1927{ 1928 if (!cancel_work_sync(&session->block_work)) 1929 cancel_delayed_work_sync(&session->recovery_work); 1930 1931 queue_work(session->workq, &session->unblock_work); 1932 /* 1933 * Blocking the session can be done from any context so we only 1934 * queue the block work. Make sure the unblock work has completed 1935 * because it flushes/cancels the other works and updates the state. 1936 */ 1937 flush_work(&session->unblock_work); 1938} 1939EXPORT_SYMBOL_GPL(iscsi_unblock_session); 1940 1941static void __iscsi_block_session(struct work_struct *work) 1942{ 1943 struct iscsi_cls_session *session = 1944 container_of(work, struct iscsi_cls_session, 1945 block_work); 1946 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1947 unsigned long flags; 1948 1949 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); 1950 spin_lock_irqsave(&session->lock, flags); 1951 session->state = ISCSI_SESSION_FAILED; 1952 spin_unlock_irqrestore(&session->lock, flags); 1953 scsi_block_targets(shost, &session->dev); 1954 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); 1955 if (session->recovery_tmo >= 0) 1956 queue_delayed_work(session->workq, 1957 &session->recovery_work, 1958 session->recovery_tmo * HZ); 1959} 1960 1961void iscsi_block_session(struct iscsi_cls_session *session) 1962{ 1963 queue_work(session->workq, &session->block_work); 1964} 1965EXPORT_SYMBOL_GPL(iscsi_block_session); 1966 1967static void __iscsi_unbind_session(struct work_struct *work) 1968{ 1969 struct iscsi_cls_session *session = 1970 container_of(work, struct iscsi_cls_session, 1971 unbind_work); 1972 struct Scsi_Host *shost = iscsi_session_to_shost(session); 1973 struct iscsi_cls_host *ihost = shost->shost_data; 1974 unsigned long flags; 1975 unsigned int target_id; 1976 bool remove_target = true; 1977 1978 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); 1979 1980 /* Prevent new scans and make sure scanning is not in progress */ 1981 mutex_lock(&ihost->mutex); 1982 spin_lock_irqsave(&session->lock, flags); 1983 if (session->target_state == ISCSI_SESSION_TARGET_ALLOCATED) { 1984 remove_target = false; 1985 } else if (session->target_state != ISCSI_SESSION_TARGET_SCANNED) { 1986 spin_unlock_irqrestore(&session->lock, flags); 1987 mutex_unlock(&ihost->mutex); 1988 ISCSI_DBG_TRANS_SESSION(session, 1989 "Skipping target unbinding: Session is unbound/unbinding.\n"); 1990 return; 1991 } 1992 1993 session->target_state = ISCSI_SESSION_TARGET_UNBINDING; 1994 target_id = session->target_id; 1995 session->target_id = ISCSI_MAX_TARGET; 1996 spin_unlock_irqrestore(&session->lock, flags); 1997 mutex_unlock(&ihost->mutex); 1998 1999 if (remove_target) 2000 scsi_remove_target(&session->dev); 2001 2002 if (session->ida_used) 2003 ida_free(&iscsi_sess_ida, target_id); 2004 2005 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); 2006 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); 2007 2008 spin_lock_irqsave(&session->lock, flags); 2009 session->target_state = ISCSI_SESSION_TARGET_UNBOUND; 2010 spin_unlock_irqrestore(&session->lock, flags); 2011} 2012 2013static void __iscsi_destroy_session(struct work_struct *work) 2014{ 2015 struct iscsi_cls_session *session = 2016 container_of(work, struct iscsi_cls_session, destroy_work); 2017 2018 session->transport->destroy_session(session); 2019} 2020 2021struct iscsi_cls_session * 2022iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2023 int dd_size) 2024{ 2025 struct iscsi_cls_session *session; 2026 2027 session = kzalloc(sizeof(*session) + dd_size, 2028 GFP_KERNEL); 2029 if (!session) 2030 return NULL; 2031 2032 session->transport = transport; 2033 session->creator = -1; 2034 session->recovery_tmo = 120; 2035 session->recovery_tmo_sysfs_override = false; 2036 session->state = ISCSI_SESSION_FREE; 2037 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); 2038 INIT_LIST_HEAD(&session->sess_list); 2039 INIT_WORK(&session->unblock_work, __iscsi_unblock_session); 2040 INIT_WORK(&session->block_work, __iscsi_block_session); 2041 INIT_WORK(&session->unbind_work, __iscsi_unbind_session); 2042 INIT_WORK(&session->scan_work, iscsi_scan_session); 2043 INIT_WORK(&session->destroy_work, __iscsi_destroy_session); 2044 spin_lock_init(&session->lock); 2045 2046 /* this is released in the dev's release function */ 2047 scsi_host_get(shost); 2048 session->dev.parent = &shost->shost_gendev; 2049 session->dev.release = iscsi_session_release; 2050 device_initialize(&session->dev); 2051 if (dd_size) 2052 session->dd_data = &session[1]; 2053 2054 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); 2055 return session; 2056} 2057EXPORT_SYMBOL_GPL(iscsi_alloc_session); 2058 2059int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) 2060{ 2061 struct Scsi_Host *shost = iscsi_session_to_shost(session); 2062 unsigned long flags; 2063 int id = 0; 2064 int err; 2065 2066 session->sid = atomic_add_return(1, &iscsi_session_nr); 2067 2068 session->workq = alloc_workqueue("iscsi_ctrl_%d:%d", 2069 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 2070 shost->host_no, session->sid); 2071 if (!session->workq) 2072 return -ENOMEM; 2073 2074 if (target_id == ISCSI_MAX_TARGET) { 2075 id = ida_alloc(&iscsi_sess_ida, GFP_KERNEL); 2076 2077 if (id < 0) { 2078 iscsi_cls_session_printk(KERN_ERR, session, 2079 "Failure in Target ID Allocation\n"); 2080 err = id; 2081 goto destroy_wq; 2082 } 2083 session->target_id = (unsigned int)id; 2084 session->ida_used = true; 2085 } else 2086 session->target_id = target_id; 2087 spin_lock_irqsave(&session->lock, flags); 2088 session->target_state = ISCSI_SESSION_TARGET_ALLOCATED; 2089 spin_unlock_irqrestore(&session->lock, flags); 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 err = transport_register_device(&session->dev); 2099 if (err) { 2100 iscsi_cls_session_printk(KERN_ERR, session, 2101 "could not register transport's dev\n"); 2102 goto release_dev; 2103 } 2104 2105 spin_lock_irqsave(&sesslock, flags); 2106 list_add(&session->sess_list, &sesslist); 2107 spin_unlock_irqrestore(&sesslock, flags); 2108 2109 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); 2110 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); 2111 return 0; 2112 2113release_dev: 2114 device_del(&session->dev); 2115release_ida: 2116 if (session->ida_used) 2117 ida_free(&iscsi_sess_ida, session->target_id); 2118destroy_wq: 2119 destroy_workqueue(session->workq); 2120 return err; 2121} 2122EXPORT_SYMBOL_GPL(iscsi_add_session); 2123 2124/** 2125 * iscsi_create_session - create iscsi class session 2126 * @shost: scsi host 2127 * @transport: iscsi transport 2128 * @dd_size: private driver data size 2129 * @target_id: which target 2130 * 2131 * This can be called from a LLD or iscsi_transport. 2132 */ 2133struct iscsi_cls_session * 2134iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, 2135 int dd_size, unsigned int target_id) 2136{ 2137 struct iscsi_cls_session *session; 2138 2139 session = iscsi_alloc_session(shost, transport, dd_size); 2140 if (!session) 2141 return NULL; 2142 2143 if (iscsi_add_session(session, target_id)) { 2144 iscsi_free_session(session); 2145 return NULL; 2146 } 2147 return session; 2148} 2149EXPORT_SYMBOL_GPL(iscsi_create_session); 2150 2151static void iscsi_conn_release(struct device *dev) 2152{ 2153 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); 2154 struct device *parent = conn->dev.parent; 2155 2156 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); 2157 kfree(conn); 2158 put_device(parent); 2159} 2160 2161static int iscsi_is_conn_dev(const struct device *dev) 2162{ 2163 return dev->release == iscsi_conn_release; 2164} 2165 2166static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) 2167{ 2168 if (!iscsi_is_conn_dev(dev)) 2169 return 0; 2170 2171 iscsi_remove_conn(iscsi_dev_to_conn(dev)); 2172 return 0; 2173} 2174 2175void iscsi_remove_session(struct iscsi_cls_session *session) 2176{ 2177 unsigned long flags; 2178 int err; 2179 2180 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); 2181 2182 spin_lock_irqsave(&sesslock, flags); 2183 if (!list_empty(&session->sess_list)) 2184 list_del(&session->sess_list); 2185 spin_unlock_irqrestore(&sesslock, flags); 2186 2187 if (!cancel_work_sync(&session->block_work)) 2188 cancel_delayed_work_sync(&session->recovery_work); 2189 cancel_work_sync(&session->unblock_work); 2190 /* 2191 * If we are blocked let commands flow again. The lld or iscsi 2192 * layer should set up the queuecommand to fail commands. 2193 * We assume that LLD will not be calling block/unblock while 2194 * removing the session. 2195 */ 2196 spin_lock_irqsave(&session->lock, flags); 2197 session->state = ISCSI_SESSION_FREE; 2198 spin_unlock_irqrestore(&session->lock, flags); 2199 2200 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); 2201 /* 2202 * qla4xxx can perform it's own scans when it runs in kernel only 2203 * mode. Make sure to flush those scans. 2204 */ 2205 flush_work(&session->scan_work); 2206 /* flush running unbind operations */ 2207 flush_work(&session->unbind_work); 2208 __iscsi_unbind_session(&session->unbind_work); 2209 2210 /* hw iscsi may not have removed all connections from session */ 2211 err = device_for_each_child(&session->dev, NULL, 2212 iscsi_iter_destroy_conn_fn); 2213 if (err) 2214 iscsi_cls_session_printk(KERN_ERR, session, 2215 "Could not delete all connections " 2216 "for session. Error %d.\n", err); 2217 2218 transport_unregister_device(&session->dev); 2219 2220 destroy_workqueue(session->workq); 2221 2222 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); 2223 device_del(&session->dev); 2224} 2225EXPORT_SYMBOL_GPL(iscsi_remove_session); 2226 2227static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag) 2228{ 2229 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n"); 2230 2231 switch (flag) { 2232 case STOP_CONN_RECOVER: 2233 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2234 break; 2235 case STOP_CONN_TERM: 2236 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2237 break; 2238 default: 2239 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n", 2240 flag); 2241 return; 2242 } 2243 2244 conn->transport->stop_conn(conn, flag); 2245 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n"); 2246} 2247 2248static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active) 2249{ 2250 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2251 struct iscsi_endpoint *ep; 2252 2253 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n"); 2254 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED); 2255 2256 if (!conn->ep || !session->transport->ep_disconnect) 2257 return; 2258 2259 ep = conn->ep; 2260 conn->ep = NULL; 2261 2262 session->transport->unbind_conn(conn, is_active); 2263 session->transport->ep_disconnect(ep); 2264 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n"); 2265} 2266 2267static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn, 2268 struct iscsi_endpoint *ep, 2269 bool is_active) 2270{ 2271 /* Check if this was a conn error and the kernel took ownership */ 2272 spin_lock_irq(&conn->lock); 2273 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2274 spin_unlock_irq(&conn->lock); 2275 iscsi_ep_disconnect(conn, is_active); 2276 } else { 2277 spin_unlock_irq(&conn->lock); 2278 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n"); 2279 mutex_unlock(&conn->ep_mutex); 2280 2281 flush_work(&conn->cleanup_work); 2282 /* 2283 * Userspace is now done with the EP so we can release the ref 2284 * iscsi_cleanup_conn_work_fn took. 2285 */ 2286 iscsi_put_endpoint(ep); 2287 mutex_lock(&conn->ep_mutex); 2288 } 2289} 2290 2291static int iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag) 2292{ 2293 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n"); 2294 /* 2295 * For offload, iscsid may not know about the ep like when iscsid is 2296 * restarted or for kernel based session shutdown iscsid is not even 2297 * up. For these cases, we do the disconnect now. 2298 */ 2299 mutex_lock(&conn->ep_mutex); 2300 if (conn->ep) 2301 iscsi_if_disconnect_bound_ep(conn, conn->ep, true); 2302 mutex_unlock(&conn->ep_mutex); 2303 2304 /* 2305 * If this is a termination we have to call stop_conn with that flag 2306 * so the correct states get set. If we haven't run the work yet try to 2307 * avoid the extra run. 2308 */ 2309 if (flag == STOP_CONN_TERM) { 2310 cancel_work_sync(&conn->cleanup_work); 2311 iscsi_stop_conn(conn, flag); 2312 } else { 2313 /* 2314 * Figure out if it was the kernel or userspace initiating this. 2315 */ 2316 spin_lock_irq(&conn->lock); 2317 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 2318 spin_unlock_irq(&conn->lock); 2319 iscsi_stop_conn(conn, flag); 2320 } else { 2321 spin_unlock_irq(&conn->lock); 2322 ISCSI_DBG_TRANS_CONN(conn, 2323 "flush kernel conn cleanup.\n"); 2324 flush_work(&conn->cleanup_work); 2325 } 2326 /* 2327 * Only clear for recovery to avoid extra cleanup runs during 2328 * termination. 2329 */ 2330 spin_lock_irq(&conn->lock); 2331 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags); 2332 spin_unlock_irq(&conn->lock); 2333 } 2334 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n"); 2335 return 0; 2336} 2337 2338static void iscsi_cleanup_conn_work_fn(struct work_struct *work) 2339{ 2340 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn, 2341 cleanup_work); 2342 struct iscsi_cls_session *session = iscsi_conn_to_session(conn); 2343 2344 mutex_lock(&conn->ep_mutex); 2345 /* 2346 * Get a ref to the ep, so we don't release its ID until after 2347 * userspace is done referencing it in iscsi_if_disconnect_bound_ep. 2348 */ 2349 if (conn->ep) 2350 get_device(&conn->ep->dev); 2351 iscsi_ep_disconnect(conn, false); 2352 2353 if (system_state != SYSTEM_RUNNING) { 2354 /* 2355 * If the user has set up for the session to never timeout 2356 * then hang like they wanted. For all other cases fail right 2357 * away since userspace is not going to relogin. 2358 */ 2359 if (session->recovery_tmo > 0) 2360 session->recovery_tmo = 0; 2361 } 2362 2363 iscsi_stop_conn(conn, STOP_CONN_RECOVER); 2364 mutex_unlock(&conn->ep_mutex); 2365 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n"); 2366} 2367 2368static int iscsi_iter_force_destroy_conn_fn(struct device *dev, void *data) 2369{ 2370 struct iscsi_transport *transport; 2371 struct iscsi_cls_conn *conn; 2372 2373 if (!iscsi_is_conn_dev(dev)) 2374 return 0; 2375 2376 conn = iscsi_dev_to_conn(dev); 2377 transport = conn->transport; 2378 2379 if (READ_ONCE(conn->state) != ISCSI_CONN_DOWN) 2380 iscsi_if_stop_conn(conn, STOP_CONN_TERM); 2381 2382 transport->destroy_conn(conn); 2383 return 0; 2384} 2385 2386/** 2387 * iscsi_force_destroy_session - destroy a session from the kernel 2388 * @session: session to destroy 2389 * 2390 * Force the destruction of a session from the kernel. This should only be 2391 * used when userspace is no longer running during system shutdown. 2392 */ 2393void iscsi_force_destroy_session(struct iscsi_cls_session *session) 2394{ 2395 struct iscsi_transport *transport = session->transport; 2396 unsigned long flags; 2397 2398 WARN_ON_ONCE(system_state == SYSTEM_RUNNING); 2399 2400 spin_lock_irqsave(&sesslock, flags); 2401 if (list_empty(&session->sess_list)) { 2402 spin_unlock_irqrestore(&sesslock, flags); 2403 /* 2404 * Conn/ep is already freed. Session is being torn down via 2405 * async path. For shutdown we don't care about it so return. 2406 */ 2407 return; 2408 } 2409 spin_unlock_irqrestore(&sesslock, flags); 2410 2411 device_for_each_child(&session->dev, NULL, 2412 iscsi_iter_force_destroy_conn_fn); 2413 transport->destroy_session(session); 2414} 2415EXPORT_SYMBOL_GPL(iscsi_force_destroy_session); 2416 2417void iscsi_free_session(struct iscsi_cls_session *session) 2418{ 2419 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); 2420 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); 2421 put_device(&session->dev); 2422} 2423EXPORT_SYMBOL_GPL(iscsi_free_session); 2424 2425/** 2426 * iscsi_alloc_conn - alloc iscsi class connection 2427 * @session: iscsi cls session 2428 * @dd_size: private driver data size 2429 * @cid: connection id 2430 */ 2431struct iscsi_cls_conn * 2432iscsi_alloc_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) 2433{ 2434 struct iscsi_transport *transport = session->transport; 2435 struct iscsi_cls_conn *conn; 2436 2437 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); 2438 if (!conn) 2439 return NULL; 2440 if (dd_size) 2441 conn->dd_data = &conn[1]; 2442 2443 mutex_init(&conn->ep_mutex); 2444 spin_lock_init(&conn->lock); 2445 INIT_LIST_HEAD(&conn->conn_list); 2446 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn); 2447 conn->transport = transport; 2448 conn->cid = cid; 2449 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN); 2450 2451 /* this is released in the dev's release function */ 2452 if (!get_device(&session->dev)) 2453 goto free_conn; 2454 2455 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); 2456 device_initialize(&conn->dev); 2457 conn->dev.parent = &session->dev; 2458 conn->dev.release = iscsi_conn_release; 2459 2460 return conn; 2461 2462free_conn: 2463 kfree(conn); 2464 return NULL; 2465} 2466EXPORT_SYMBOL_GPL(iscsi_alloc_conn); 2467 2468/** 2469 * iscsi_add_conn - add iscsi class connection 2470 * @conn: iscsi cls connection 2471 * 2472 * This will expose iscsi_cls_conn to sysfs so make sure the related 2473 * resources for sysfs attributes are initialized before calling this. 2474 */ 2475int iscsi_add_conn(struct iscsi_cls_conn *conn) 2476{ 2477 int err; 2478 unsigned long flags; 2479 struct iscsi_cls_session *session = iscsi_dev_to_session(conn->dev.parent); 2480 2481 err = device_add(&conn->dev); 2482 if (err) { 2483 iscsi_cls_session_printk(KERN_ERR, session, 2484 "could not register connection's dev\n"); 2485 return err; 2486 } 2487 err = transport_register_device(&conn->dev); 2488 if (err) { 2489 iscsi_cls_session_printk(KERN_ERR, session, 2490 "could not register transport's dev\n"); 2491 device_del(&conn->dev); 2492 return err; 2493 } 2494 2495 spin_lock_irqsave(&connlock, flags); 2496 list_add(&conn->conn_list, &connlist); 2497 spin_unlock_irqrestore(&connlock, flags); 2498 2499 return 0; 2500} 2501EXPORT_SYMBOL_GPL(iscsi_add_conn); 2502 2503/** 2504 * iscsi_remove_conn - remove iscsi class connection from sysfs 2505 * @conn: iscsi cls connection 2506 * 2507 * Remove iscsi_cls_conn from sysfs, and wait for previous 2508 * read/write of iscsi_cls_conn's attributes in sysfs to finish. 2509 */ 2510void iscsi_remove_conn(struct iscsi_cls_conn *conn) 2511{ 2512 unsigned long flags; 2513 2514 spin_lock_irqsave(&connlock, flags); 2515 list_del(&conn->conn_list); 2516 spin_unlock_irqrestore(&connlock, flags); 2517 2518 transport_unregister_device(&conn->dev); 2519 device_del(&conn->dev); 2520} 2521EXPORT_SYMBOL_GPL(iscsi_remove_conn); 2522 2523void iscsi_put_conn(struct iscsi_cls_conn *conn) 2524{ 2525 put_device(&conn->dev); 2526} 2527EXPORT_SYMBOL_GPL(iscsi_put_conn); 2528 2529void iscsi_get_conn(struct iscsi_cls_conn *conn) 2530{ 2531 get_device(&conn->dev); 2532} 2533EXPORT_SYMBOL_GPL(iscsi_get_conn); 2534 2535/* 2536 * iscsi interface functions 2537 */ 2538static struct iscsi_internal * 2539iscsi_if_transport_lookup(struct iscsi_transport *tt) 2540{ 2541 struct iscsi_internal *priv; 2542 unsigned long flags; 2543 2544 spin_lock_irqsave(&iscsi_transport_lock, flags); 2545 list_for_each_entry(priv, &iscsi_transports, list) { 2546 if (tt == priv->iscsi_transport) { 2547 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2548 return priv; 2549 } 2550 } 2551 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 2552 return NULL; 2553} 2554 2555static int 2556iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) 2557{ 2558 return nlmsg_multicast(nls, skb, 0, group, gfp); 2559} 2560 2561static int 2562iscsi_unicast_skb(struct sk_buff *skb, u32 portid) 2563{ 2564 return nlmsg_unicast(nls, skb, portid); 2565} 2566 2567int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 2568 char *data, uint32_t data_size) 2569{ 2570 struct nlmsghdr *nlh; 2571 struct sk_buff *skb; 2572 struct iscsi_uevent *ev; 2573 char *pdu; 2574 struct iscsi_internal *priv; 2575 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + 2576 data_size); 2577 2578 priv = iscsi_if_transport_lookup(conn->transport); 2579 if (!priv) 2580 return -EINVAL; 2581 2582 skb = alloc_skb(len, GFP_ATOMIC); 2583 if (!skb) { 2584 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); 2585 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " 2586 "control PDU: OOM\n"); 2587 return -ENOMEM; 2588 } 2589 2590 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2591 ev = nlmsg_data(nlh); 2592 memset(ev, 0, sizeof(*ev)); 2593 ev->transport_handle = iscsi_handle(conn->transport); 2594 ev->type = ISCSI_KEVENT_RECV_PDU; 2595 ev->r.recv_req.cid = conn->cid; 2596 ev->r.recv_req.sid = iscsi_conn_get_sid(conn); 2597 pdu = (char*)ev + sizeof(*ev); 2598 memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); 2599 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); 2600 2601 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2602} 2603EXPORT_SYMBOL_GPL(iscsi_recv_pdu); 2604 2605int iscsi_offload_mesg(struct Scsi_Host *shost, 2606 struct iscsi_transport *transport, uint32_t type, 2607 char *data, uint16_t data_size) 2608{ 2609 struct nlmsghdr *nlh; 2610 struct sk_buff *skb; 2611 struct iscsi_uevent *ev; 2612 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2613 2614 skb = alloc_skb(len, GFP_ATOMIC); 2615 if (!skb) { 2616 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); 2617 return -ENOMEM; 2618 } 2619 2620 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2621 ev = nlmsg_data(nlh); 2622 memset(ev, 0, sizeof(*ev)); 2623 ev->type = type; 2624 ev->transport_handle = iscsi_handle(transport); 2625 switch (type) { 2626 case ISCSI_KEVENT_PATH_REQ: 2627 ev->r.req_path.host_no = shost->host_no; 2628 break; 2629 case ISCSI_KEVENT_IF_DOWN: 2630 ev->r.notify_if_down.host_no = shost->host_no; 2631 break; 2632 } 2633 2634 memcpy((char *)ev + sizeof(*ev), data, data_size); 2635 2636 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); 2637} 2638EXPORT_SYMBOL_GPL(iscsi_offload_mesg); 2639 2640void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) 2641{ 2642 struct nlmsghdr *nlh; 2643 struct sk_buff *skb; 2644 struct iscsi_uevent *ev; 2645 struct iscsi_internal *priv; 2646 int len = nlmsg_total_size(sizeof(*ev)); 2647 unsigned long flags; 2648 int state; 2649 2650 spin_lock_irqsave(&conn->lock, flags); 2651 /* 2652 * Userspace will only do a stop call if we are at least bound. And, we 2653 * only need to do the in kernel cleanup if in the UP state so cmds can 2654 * be released to upper layers. If in other states just wait for 2655 * userspace to avoid races that can leave the cleanup_work queued. 2656 */ 2657 state = READ_ONCE(conn->state); 2658 switch (state) { 2659 case ISCSI_CONN_BOUND: 2660 case ISCSI_CONN_UP: 2661 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, 2662 &conn->flags)) { 2663 queue_work(iscsi_conn_cleanup_workq, 2664 &conn->cleanup_work); 2665 } 2666 break; 2667 default: 2668 ISCSI_DBG_TRANS_CONN(conn, "Got conn error in state %d\n", 2669 state); 2670 break; 2671 } 2672 spin_unlock_irqrestore(&conn->lock, flags); 2673 2674 priv = iscsi_if_transport_lookup(conn->transport); 2675 if (!priv) 2676 return; 2677 2678 skb = alloc_skb(len, GFP_ATOMIC); 2679 if (!skb) { 2680 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2681 "conn error (%d)\n", error); 2682 return; 2683 } 2684 2685 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2686 ev = nlmsg_data(nlh); 2687 ev->transport_handle = iscsi_handle(conn->transport); 2688 ev->type = ISCSI_KEVENT_CONN_ERROR; 2689 ev->r.connerror.error = error; 2690 ev->r.connerror.cid = conn->cid; 2691 ev->r.connerror.sid = iscsi_conn_get_sid(conn); 2692 2693 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2694 2695 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", 2696 error); 2697} 2698EXPORT_SYMBOL_GPL(iscsi_conn_error_event); 2699 2700void iscsi_conn_login_event(struct iscsi_cls_conn *conn, 2701 enum iscsi_conn_state state) 2702{ 2703 struct nlmsghdr *nlh; 2704 struct sk_buff *skb; 2705 struct iscsi_uevent *ev; 2706 struct iscsi_internal *priv; 2707 int len = nlmsg_total_size(sizeof(*ev)); 2708 2709 priv = iscsi_if_transport_lookup(conn->transport); 2710 if (!priv) 2711 return; 2712 2713 skb = alloc_skb(len, GFP_ATOMIC); 2714 if (!skb) { 2715 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " 2716 "conn login (%d)\n", state); 2717 return; 2718 } 2719 2720 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2721 ev = nlmsg_data(nlh); 2722 ev->transport_handle = iscsi_handle(conn->transport); 2723 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; 2724 ev->r.conn_login.state = state; 2725 ev->r.conn_login.cid = conn->cid; 2726 ev->r.conn_login.sid = iscsi_conn_get_sid(conn); 2727 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); 2728 2729 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", 2730 state); 2731} 2732EXPORT_SYMBOL_GPL(iscsi_conn_login_event); 2733 2734void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, 2735 enum iscsi_host_event_code code, uint32_t data_size, 2736 uint8_t *data) 2737{ 2738 struct nlmsghdr *nlh; 2739 struct sk_buff *skb; 2740 struct iscsi_uevent *ev; 2741 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2742 2743 skb = alloc_skb(len, GFP_NOIO); 2744 if (!skb) { 2745 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", 2746 host_no, code); 2747 return; 2748 } 2749 2750 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2751 ev = nlmsg_data(nlh); 2752 ev->transport_handle = iscsi_handle(transport); 2753 ev->type = ISCSI_KEVENT_HOST_EVENT; 2754 ev->r.host_event.host_no = host_no; 2755 ev->r.host_event.code = code; 2756 ev->r.host_event.data_size = data_size; 2757 2758 if (data_size) 2759 memcpy((char *)ev + sizeof(*ev), data, data_size); 2760 2761 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2762} 2763EXPORT_SYMBOL_GPL(iscsi_post_host_event); 2764 2765void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, 2766 uint32_t status, uint32_t pid, uint32_t data_size, 2767 uint8_t *data) 2768{ 2769 struct nlmsghdr *nlh; 2770 struct sk_buff *skb; 2771 struct iscsi_uevent *ev; 2772 int len = nlmsg_total_size(sizeof(*ev) + data_size); 2773 2774 skb = alloc_skb(len, GFP_NOIO); 2775 if (!skb) { 2776 printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); 2777 return; 2778 } 2779 2780 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2781 ev = nlmsg_data(nlh); 2782 ev->transport_handle = iscsi_handle(transport); 2783 ev->type = ISCSI_KEVENT_PING_COMP; 2784 ev->r.ping_comp.host_no = host_no; 2785 ev->r.ping_comp.status = status; 2786 ev->r.ping_comp.pid = pid; 2787 ev->r.ping_comp.data_size = data_size; 2788 memcpy((char *)ev + sizeof(*ev), data, data_size); 2789 2790 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); 2791} 2792EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); 2793 2794static int 2795iscsi_if_send_reply(u32 portid, int type, void *payload, int size) 2796{ 2797 struct sk_buff *skb; 2798 struct nlmsghdr *nlh; 2799 int len = nlmsg_total_size(size); 2800 2801 skb = alloc_skb(len, GFP_ATOMIC); 2802 if (!skb) { 2803 printk(KERN_ERR "Could not allocate skb to send reply.\n"); 2804 return -ENOMEM; 2805 } 2806 2807 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); 2808 memcpy(nlmsg_data(nlh), payload, size); 2809 return iscsi_unicast_skb(skb, portid); 2810} 2811 2812static int 2813iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 2814{ 2815 struct iscsi_uevent *ev = nlmsg_data(nlh); 2816 struct iscsi_stats *stats; 2817 struct sk_buff *skbstat; 2818 struct iscsi_cls_conn *conn; 2819 struct nlmsghdr *nlhstat; 2820 struct iscsi_uevent *evstat; 2821 struct iscsi_internal *priv; 2822 int len = nlmsg_total_size(sizeof(*ev) + 2823 sizeof(struct iscsi_stats) + 2824 sizeof(struct iscsi_stats_custom) * 2825 ISCSI_STATS_CUSTOM_MAX); 2826 int err = 0; 2827 2828 priv = iscsi_if_transport_lookup(transport); 2829 if (!priv) 2830 return -EINVAL; 2831 2832 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); 2833 if (!conn) 2834 return -EEXIST; 2835 2836 do { 2837 int actual_size; 2838 2839 skbstat = alloc_skb(len, GFP_ATOMIC); 2840 if (!skbstat) { 2841 iscsi_cls_conn_printk(KERN_ERR, conn, "can not " 2842 "deliver stats: OOM\n"); 2843 return -ENOMEM; 2844 } 2845 2846 nlhstat = __nlmsg_put(skbstat, 0, 0, 0, 2847 (len - sizeof(*nlhstat)), 0); 2848 evstat = nlmsg_data(nlhstat); 2849 memset(evstat, 0, sizeof(*evstat)); 2850 evstat->transport_handle = iscsi_handle(conn->transport); 2851 evstat->type = nlh->nlmsg_type; 2852 evstat->u.get_stats.cid = 2853 ev->u.get_stats.cid; 2854 evstat->u.get_stats.sid = 2855 ev->u.get_stats.sid; 2856 stats = (struct iscsi_stats *) 2857 ((char*)evstat + sizeof(*evstat)); 2858 memset(stats, 0, sizeof(*stats)); 2859 2860 transport->get_stats(conn, stats); 2861 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + 2862 sizeof(struct iscsi_stats) + 2863 sizeof(struct iscsi_stats_custom) * 2864 stats->custom_length); 2865 actual_size -= sizeof(*nlhstat); 2866 actual_size = nlmsg_msg_size(actual_size); 2867 skb_trim(skbstat, NLMSG_ALIGN(actual_size)); 2868 nlhstat->nlmsg_len = actual_size; 2869 2870 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, 2871 GFP_ATOMIC); 2872 } while (err < 0 && err != -ECONNREFUSED); 2873 2874 return err; 2875} 2876 2877/** 2878 * iscsi_session_event - send session destr. completion event 2879 * @session: iscsi class session 2880 * @event: type of event 2881 */ 2882int iscsi_session_event(struct iscsi_cls_session *session, 2883 enum iscsi_uevent_e event) 2884{ 2885 struct iscsi_internal *priv; 2886 struct Scsi_Host *shost; 2887 struct iscsi_uevent *ev; 2888 struct sk_buff *skb; 2889 struct nlmsghdr *nlh; 2890 int rc, len = nlmsg_total_size(sizeof(*ev)); 2891 2892 priv = iscsi_if_transport_lookup(session->transport); 2893 if (!priv) 2894 return -EINVAL; 2895 shost = iscsi_session_to_shost(session); 2896 2897 skb = alloc_skb(len, GFP_KERNEL); 2898 if (!skb) { 2899 iscsi_cls_session_printk(KERN_ERR, session, 2900 "Cannot notify userspace of session " 2901 "event %u\n", event); 2902 return -ENOMEM; 2903 } 2904 2905 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); 2906 ev = nlmsg_data(nlh); 2907 ev->transport_handle = iscsi_handle(session->transport); 2908 2909 ev->type = event; 2910 switch (event) { 2911 case ISCSI_KEVENT_DESTROY_SESSION: 2912 ev->r.d_session.host_no = shost->host_no; 2913 ev->r.d_session.sid = session->sid; 2914 break; 2915 case ISCSI_KEVENT_CREATE_SESSION: 2916 ev->r.c_session_ret.host_no = shost->host_no; 2917 ev->r.c_session_ret.sid = session->sid; 2918 break; 2919 case ISCSI_KEVENT_UNBIND_SESSION: 2920 ev->r.unbind_session.host_no = shost->host_no; 2921 ev->r.unbind_session.sid = session->sid; 2922 break; 2923 default: 2924 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " 2925 "%u.\n", event); 2926 kfree_skb(skb); 2927 return -EINVAL; 2928 } 2929 2930 /* 2931 * this will occur if the daemon is not up, so we just warn 2932 * the user and when the daemon is restarted it will handle it 2933 */ 2934 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); 2935 if (rc == -ESRCH) 2936 iscsi_cls_session_printk(KERN_ERR, session, 2937 "Cannot notify userspace of session " 2938 "event %u. Check iscsi daemon\n", 2939 event); 2940 2941 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", 2942 event, rc); 2943 return rc; 2944} 2945EXPORT_SYMBOL_GPL(iscsi_session_event); 2946 2947static int 2948iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, 2949 struct iscsi_uevent *ev, pid_t pid, 2950 uint32_t initial_cmdsn, uint16_t cmds_max, 2951 uint16_t queue_depth) 2952{ 2953 struct iscsi_transport *transport = priv->iscsi_transport; 2954 struct iscsi_cls_session *session; 2955 struct Scsi_Host *shost; 2956 2957 session = transport->create_session(ep, cmds_max, queue_depth, 2958 initial_cmdsn); 2959 if (!session) 2960 return -ENOMEM; 2961 2962 session->creator = pid; 2963 shost = iscsi_session_to_shost(session); 2964 ev->r.c_session_ret.host_no = shost->host_no; 2965 ev->r.c_session_ret.sid = session->sid; 2966 ISCSI_DBG_TRANS_SESSION(session, 2967 "Completed creating transport session\n"); 2968 return 0; 2969} 2970 2971static int 2972iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 2973{ 2974 struct iscsi_cls_conn *conn; 2975 struct iscsi_cls_session *session; 2976 2977 session = iscsi_session_lookup(ev->u.c_conn.sid); 2978 if (!session) { 2979 printk(KERN_ERR "iscsi: invalid session %d.\n", 2980 ev->u.c_conn.sid); 2981 return -EINVAL; 2982 } 2983 2984 conn = transport->create_conn(session, ev->u.c_conn.cid); 2985 if (!conn) { 2986 iscsi_cls_session_printk(KERN_ERR, session, 2987 "couldn't create a new connection."); 2988 return -ENOMEM; 2989 } 2990 2991 ev->r.c_conn_ret.sid = session->sid; 2992 ev->r.c_conn_ret.cid = conn->cid; 2993 2994 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); 2995 return 0; 2996} 2997 2998static int 2999iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 3000{ 3001 struct iscsi_cls_conn *conn; 3002 3003 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); 3004 if (!conn) 3005 return -EINVAL; 3006 3007 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n"); 3008 flush_work(&conn->cleanup_work); 3009 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); 3010 3011 if (transport->destroy_conn) 3012 transport->destroy_conn(conn); 3013 return 0; 3014} 3015 3016static int 3017iscsi_if_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen) 3018{ 3019 char *data = (char*)ev + sizeof(*ev); 3020 struct iscsi_cls_conn *conn; 3021 struct iscsi_cls_session *session; 3022 int err = 0, value = 0, state; 3023 3024 if (ev->u.set_param.len > rlen || 3025 ev->u.set_param.len > PAGE_SIZE) 3026 return -EINVAL; 3027 3028 session = iscsi_session_lookup(ev->u.set_param.sid); 3029 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); 3030 if (!conn || !session) 3031 return -EINVAL; 3032 3033 /* data will be regarded as NULL-ended string, do length check */ 3034 if (strlen(data) > ev->u.set_param.len) 3035 return -EINVAL; 3036 3037 switch (ev->u.set_param.param) { 3038 case ISCSI_PARAM_SESS_RECOVERY_TMO: 3039 sscanf(data, "%d", &value); 3040 if (!session->recovery_tmo_sysfs_override) 3041 session->recovery_tmo = value; 3042 break; 3043 default: 3044 state = READ_ONCE(conn->state); 3045 if (state == ISCSI_CONN_BOUND || state == ISCSI_CONN_UP) { 3046 err = transport->set_param(conn, ev->u.set_param.param, 3047 data, ev->u.set_param.len); 3048 } else { 3049 return -ENOTCONN; 3050 } 3051 } 3052 3053 return err; 3054} 3055 3056static int iscsi_if_ep_connect(struct iscsi_transport *transport, 3057 struct iscsi_uevent *ev, int msg_type) 3058{ 3059 struct iscsi_endpoint *ep; 3060 struct sockaddr *dst_addr; 3061 struct Scsi_Host *shost = NULL; 3062 int non_blocking, err = 0; 3063 3064 if (!transport->ep_connect) 3065 return -EINVAL; 3066 3067 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { 3068 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); 3069 if (!shost) { 3070 printk(KERN_ERR "ep connect failed. Could not find " 3071 "host no %u\n", 3072 ev->u.ep_connect_through_host.host_no); 3073 return -ENODEV; 3074 } 3075 non_blocking = ev->u.ep_connect_through_host.non_blocking; 3076 } else 3077 non_blocking = ev->u.ep_connect.non_blocking; 3078 3079 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3080 ep = transport->ep_connect(shost, dst_addr, non_blocking); 3081 if (IS_ERR(ep)) { 3082 err = PTR_ERR(ep); 3083 goto release_host; 3084 } 3085 3086 ev->r.ep_connect_ret.handle = ep->id; 3087release_host: 3088 if (shost) 3089 scsi_host_put(shost); 3090 return err; 3091} 3092 3093static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, 3094 u64 ep_handle) 3095{ 3096 struct iscsi_cls_conn *conn; 3097 struct iscsi_endpoint *ep; 3098 3099 if (!transport->ep_disconnect) 3100 return -EINVAL; 3101 3102 ep = iscsi_lookup_endpoint(ep_handle); 3103 if (!ep) 3104 return -EINVAL; 3105 3106 conn = ep->conn; 3107 if (!conn) { 3108 /* 3109 * conn was not even bound yet, so we can't get iscsi conn 3110 * failures yet. 3111 */ 3112 transport->ep_disconnect(ep); 3113 goto put_ep; 3114 } 3115 3116 mutex_lock(&conn->ep_mutex); 3117 iscsi_if_disconnect_bound_ep(conn, ep, false); 3118 mutex_unlock(&conn->ep_mutex); 3119put_ep: 3120 iscsi_put_endpoint(ep); 3121 return 0; 3122} 3123 3124static int 3125iscsi_if_transport_ep(struct iscsi_transport *transport, 3126 struct iscsi_uevent *ev, int msg_type, u32 rlen) 3127{ 3128 struct iscsi_endpoint *ep; 3129 int rc = 0; 3130 3131 switch (msg_type) { 3132 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 3133 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 3134 if (rlen < sizeof(struct sockaddr)) 3135 rc = -EINVAL; 3136 else 3137 rc = iscsi_if_ep_connect(transport, ev, msg_type); 3138 break; 3139 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 3140 if (!transport->ep_poll) 3141 return -EINVAL; 3142 3143 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); 3144 if (!ep) 3145 return -EINVAL; 3146 3147 ev->r.retcode = transport->ep_poll(ep, 3148 ev->u.ep_poll.timeout_ms); 3149 iscsi_put_endpoint(ep); 3150 break; 3151 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 3152 rc = iscsi_if_ep_disconnect(transport, 3153 ev->u.ep_disconnect.ep_handle); 3154 break; 3155 } 3156 return rc; 3157} 3158 3159static int 3160iscsi_tgt_dscvr(struct iscsi_transport *transport, 3161 struct iscsi_uevent *ev, u32 rlen) 3162{ 3163 struct Scsi_Host *shost; 3164 struct sockaddr *dst_addr; 3165 int err; 3166 3167 if (rlen < sizeof(*dst_addr)) 3168 return -EINVAL; 3169 3170 if (!transport->tgt_dscvr) 3171 return -EINVAL; 3172 3173 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); 3174 if (!shost) { 3175 printk(KERN_ERR "target discovery could not find host no %u\n", 3176 ev->u.tgt_dscvr.host_no); 3177 return -ENODEV; 3178 } 3179 3180 3181 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); 3182 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, 3183 ev->u.tgt_dscvr.enable, dst_addr); 3184 scsi_host_put(shost); 3185 return err; 3186} 3187 3188static int 3189iscsi_set_host_param(struct iscsi_transport *transport, 3190 struct iscsi_uevent *ev, u32 rlen) 3191{ 3192 char *data = (char*)ev + sizeof(*ev); 3193 struct Scsi_Host *shost; 3194 int err; 3195 3196 if (!transport->set_host_param) 3197 return -ENOSYS; 3198 3199 if (ev->u.set_host_param.len > rlen || 3200 ev->u.set_host_param.len > PAGE_SIZE) 3201 return -EINVAL; 3202 3203 shost = scsi_host_lookup(ev->u.set_host_param.host_no); 3204 if (!shost) { 3205 printk(KERN_ERR "set_host_param could not find host no %u\n", 3206 ev->u.set_host_param.host_no); 3207 return -ENODEV; 3208 } 3209 3210 /* see similar check in iscsi_if_set_param() */ 3211 if (strlen(data) > ev->u.set_host_param.len) 3212 return -EINVAL; 3213 3214 err = transport->set_host_param(shost, ev->u.set_host_param.param, 3215 data, ev->u.set_host_param.len); 3216 scsi_host_put(shost); 3217 return err; 3218} 3219 3220static int 3221iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen) 3222{ 3223 struct Scsi_Host *shost; 3224 struct iscsi_path *params; 3225 int err; 3226 3227 if (rlen < sizeof(*params)) 3228 return -EINVAL; 3229 3230 if (!transport->set_path) 3231 return -ENOSYS; 3232 3233 shost = scsi_host_lookup(ev->u.set_path.host_no); 3234 if (!shost) { 3235 printk(KERN_ERR "set path could not find host no %u\n", 3236 ev->u.set_path.host_no); 3237 return -ENODEV; 3238 } 3239 3240 params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); 3241 err = transport->set_path(shost, params); 3242 3243 scsi_host_put(shost); 3244 return err; 3245} 3246 3247static int iscsi_session_has_conns(int sid) 3248{ 3249 struct iscsi_cls_conn *conn; 3250 unsigned long flags; 3251 int found = 0; 3252 3253 spin_lock_irqsave(&connlock, flags); 3254 list_for_each_entry(conn, &connlist, conn_list) { 3255 if (iscsi_conn_get_sid(conn) == sid) { 3256 found = 1; 3257 break; 3258 } 3259 } 3260 spin_unlock_irqrestore(&connlock, flags); 3261 3262 return found; 3263} 3264 3265static int 3266iscsi_set_iface_params(struct iscsi_transport *transport, 3267 struct iscsi_uevent *ev, uint32_t len) 3268{ 3269 char *data = (char *)ev + sizeof(*ev); 3270 struct Scsi_Host *shost; 3271 int err; 3272 3273 if (!transport->set_iface_param) 3274 return -ENOSYS; 3275 3276 shost = scsi_host_lookup(ev->u.set_iface_params.host_no); 3277 if (!shost) { 3278 printk(KERN_ERR "set_iface_params could not find host no %u\n", 3279 ev->u.set_iface_params.host_no); 3280 return -ENODEV; 3281 } 3282 3283 err = transport->set_iface_param(shost, data, len); 3284 scsi_host_put(shost); 3285 return err; 3286} 3287 3288static int 3289iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen) 3290{ 3291 struct Scsi_Host *shost; 3292 struct sockaddr *dst_addr; 3293 int err; 3294 3295 if (rlen < sizeof(*dst_addr)) 3296 return -EINVAL; 3297 3298 if (!transport->send_ping) 3299 return -ENOSYS; 3300 3301 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no); 3302 if (!shost) { 3303 printk(KERN_ERR "iscsi_ping could not find host no %u\n", 3304 ev->u.iscsi_ping.host_no); 3305 return -ENODEV; 3306 } 3307 3308 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev)); 3309 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num, 3310 ev->u.iscsi_ping.iface_type, 3311 ev->u.iscsi_ping.payload_size, 3312 ev->u.iscsi_ping.pid, 3313 dst_addr); 3314 scsi_host_put(shost); 3315 return err; 3316} 3317 3318static int 3319iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3320{ 3321 struct iscsi_uevent *ev = nlmsg_data(nlh); 3322 struct Scsi_Host *shost = NULL; 3323 struct iscsi_chap_rec *chap_rec; 3324 struct iscsi_internal *priv; 3325 struct sk_buff *skbchap; 3326 struct nlmsghdr *nlhchap; 3327 struct iscsi_uevent *evchap; 3328 uint32_t chap_buf_size; 3329 int len, err = 0; 3330 char *buf; 3331 3332 if (!transport->get_chap) 3333 return -EINVAL; 3334 3335 priv = iscsi_if_transport_lookup(transport); 3336 if (!priv) 3337 return -EINVAL; 3338 3339 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec)); 3340 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3341 3342 shost = scsi_host_lookup(ev->u.get_chap.host_no); 3343 if (!shost) { 3344 printk(KERN_ERR "%s: failed. Could not find host no %u\n", 3345 __func__, ev->u.get_chap.host_no); 3346 return -ENODEV; 3347 } 3348 3349 do { 3350 int actual_size; 3351 3352 skbchap = alloc_skb(len, GFP_KERNEL); 3353 if (!skbchap) { 3354 printk(KERN_ERR "can not deliver chap: OOM\n"); 3355 err = -ENOMEM; 3356 goto exit_get_chap; 3357 } 3358 3359 nlhchap = __nlmsg_put(skbchap, 0, 0, 0, 3360 (len - sizeof(*nlhchap)), 0); 3361 evchap = nlmsg_data(nlhchap); 3362 memset(evchap, 0, sizeof(*evchap)); 3363 evchap->transport_handle = iscsi_handle(transport); 3364 evchap->type = nlh->nlmsg_type; 3365 evchap->u.get_chap.host_no = ev->u.get_chap.host_no; 3366 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx; 3367 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries; 3368 buf = (char *)evchap + sizeof(*evchap); 3369 memset(buf, 0, chap_buf_size); 3370 3371 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx, 3372 &evchap->u.get_chap.num_entries, buf); 3373 3374 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size); 3375 skb_trim(skbchap, NLMSG_ALIGN(actual_size)); 3376 nlhchap->nlmsg_len = actual_size; 3377 3378 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID, 3379 GFP_KERNEL); 3380 } while (err < 0 && err != -ECONNREFUSED); 3381 3382exit_get_chap: 3383 scsi_host_put(shost); 3384 return err; 3385} 3386 3387static int iscsi_set_chap(struct iscsi_transport *transport, 3388 struct iscsi_uevent *ev, uint32_t len) 3389{ 3390 char *data = (char *)ev + sizeof(*ev); 3391 struct Scsi_Host *shost; 3392 int err = 0; 3393 3394 if (!transport->set_chap) 3395 return -ENOSYS; 3396 3397 shost = scsi_host_lookup(ev->u.set_path.host_no); 3398 if (!shost) { 3399 pr_err("%s could not find host no %u\n", 3400 __func__, ev->u.set_path.host_no); 3401 return -ENODEV; 3402 } 3403 3404 err = transport->set_chap(shost, data, len); 3405 scsi_host_put(shost); 3406 return err; 3407} 3408 3409static int iscsi_delete_chap(struct iscsi_transport *transport, 3410 struct iscsi_uevent *ev) 3411{ 3412 struct Scsi_Host *shost; 3413 int err = 0; 3414 3415 if (!transport->delete_chap) 3416 return -ENOSYS; 3417 3418 shost = scsi_host_lookup(ev->u.delete_chap.host_no); 3419 if (!shost) { 3420 printk(KERN_ERR "%s could not find host no %u\n", 3421 __func__, ev->u.delete_chap.host_no); 3422 return -ENODEV; 3423 } 3424 3425 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx); 3426 scsi_host_put(shost); 3427 return err; 3428} 3429 3430static const struct { 3431 enum iscsi_discovery_parent_type value; 3432 char *name; 3433} iscsi_discovery_parent_names[] = { 3434 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" }, 3435 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" }, 3436 {ISCSI_DISC_PARENT_ISNS, "isns" }, 3437}; 3438 3439char *iscsi_get_discovery_parent_name(int parent_type) 3440{ 3441 int i; 3442 char *state = "Unknown!"; 3443 3444 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) { 3445 if (iscsi_discovery_parent_names[i].value & parent_type) { 3446 state = iscsi_discovery_parent_names[i].name; 3447 break; 3448 } 3449 } 3450 return state; 3451} 3452EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name); 3453 3454static int iscsi_set_flashnode_param(struct iscsi_transport *transport, 3455 struct iscsi_uevent *ev, uint32_t len) 3456{ 3457 char *data = (char *)ev + sizeof(*ev); 3458 struct Scsi_Host *shost; 3459 struct iscsi_bus_flash_session *fnode_sess; 3460 struct iscsi_bus_flash_conn *fnode_conn; 3461 struct device *dev; 3462 uint32_t idx; 3463 int err = 0; 3464 3465 if (!transport->set_flashnode_param) { 3466 err = -ENOSYS; 3467 goto exit_set_fnode; 3468 } 3469 3470 shost = scsi_host_lookup(ev->u.set_flashnode.host_no); 3471 if (!shost) { 3472 pr_err("%s could not find host no %u\n", 3473 __func__, ev->u.set_flashnode.host_no); 3474 err = -ENODEV; 3475 goto exit_set_fnode; 3476 } 3477 3478 idx = ev->u.set_flashnode.flashnode_idx; 3479 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3480 if (!fnode_sess) { 3481 pr_err("%s could not find flashnode %u for host no %u\n", 3482 __func__, idx, ev->u.set_flashnode.host_no); 3483 err = -ENODEV; 3484 goto put_host; 3485 } 3486 3487 dev = iscsi_find_flashnode_conn(fnode_sess); 3488 if (!dev) { 3489 err = -ENODEV; 3490 goto put_sess; 3491 } 3492 3493 fnode_conn = iscsi_dev_to_flash_conn(dev); 3494 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len); 3495 put_device(dev); 3496 3497put_sess: 3498 put_device(&fnode_sess->dev); 3499 3500put_host: 3501 scsi_host_put(shost); 3502 3503exit_set_fnode: 3504 return err; 3505} 3506 3507static int iscsi_new_flashnode(struct iscsi_transport *transport, 3508 struct iscsi_uevent *ev, uint32_t len) 3509{ 3510 char *data = (char *)ev + sizeof(*ev); 3511 struct Scsi_Host *shost; 3512 int index; 3513 int err = 0; 3514 3515 if (!transport->new_flashnode) { 3516 err = -ENOSYS; 3517 goto exit_new_fnode; 3518 } 3519 3520 shost = scsi_host_lookup(ev->u.new_flashnode.host_no); 3521 if (!shost) { 3522 pr_err("%s could not find host no %u\n", 3523 __func__, ev->u.new_flashnode.host_no); 3524 err = -ENODEV; 3525 goto put_host; 3526 } 3527 3528 index = transport->new_flashnode(shost, data, len); 3529 3530 if (index >= 0) 3531 ev->r.new_flashnode_ret.flashnode_idx = index; 3532 else 3533 err = -EIO; 3534 3535put_host: 3536 scsi_host_put(shost); 3537 3538exit_new_fnode: 3539 return err; 3540} 3541 3542static int iscsi_del_flashnode(struct iscsi_transport *transport, 3543 struct iscsi_uevent *ev) 3544{ 3545 struct Scsi_Host *shost; 3546 struct iscsi_bus_flash_session *fnode_sess; 3547 uint32_t idx; 3548 int err = 0; 3549 3550 if (!transport->del_flashnode) { 3551 err = -ENOSYS; 3552 goto exit_del_fnode; 3553 } 3554 3555 shost = scsi_host_lookup(ev->u.del_flashnode.host_no); 3556 if (!shost) { 3557 pr_err("%s could not find host no %u\n", 3558 __func__, ev->u.del_flashnode.host_no); 3559 err = -ENODEV; 3560 goto put_host; 3561 } 3562 3563 idx = ev->u.del_flashnode.flashnode_idx; 3564 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3565 if (!fnode_sess) { 3566 pr_err("%s could not find flashnode %u for host no %u\n", 3567 __func__, idx, ev->u.del_flashnode.host_no); 3568 err = -ENODEV; 3569 goto put_host; 3570 } 3571 3572 err = transport->del_flashnode(fnode_sess); 3573 put_device(&fnode_sess->dev); 3574 3575put_host: 3576 scsi_host_put(shost); 3577 3578exit_del_fnode: 3579 return err; 3580} 3581 3582static int iscsi_login_flashnode(struct iscsi_transport *transport, 3583 struct iscsi_uevent *ev) 3584{ 3585 struct Scsi_Host *shost; 3586 struct iscsi_bus_flash_session *fnode_sess; 3587 struct iscsi_bus_flash_conn *fnode_conn; 3588 struct device *dev; 3589 uint32_t idx; 3590 int err = 0; 3591 3592 if (!transport->login_flashnode) { 3593 err = -ENOSYS; 3594 goto exit_login_fnode; 3595 } 3596 3597 shost = scsi_host_lookup(ev->u.login_flashnode.host_no); 3598 if (!shost) { 3599 pr_err("%s could not find host no %u\n", 3600 __func__, ev->u.login_flashnode.host_no); 3601 err = -ENODEV; 3602 goto put_host; 3603 } 3604 3605 idx = ev->u.login_flashnode.flashnode_idx; 3606 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3607 if (!fnode_sess) { 3608 pr_err("%s could not find flashnode %u for host no %u\n", 3609 __func__, idx, ev->u.login_flashnode.host_no); 3610 err = -ENODEV; 3611 goto put_host; 3612 } 3613 3614 dev = iscsi_find_flashnode_conn(fnode_sess); 3615 if (!dev) { 3616 err = -ENODEV; 3617 goto put_sess; 3618 } 3619 3620 fnode_conn = iscsi_dev_to_flash_conn(dev); 3621 err = transport->login_flashnode(fnode_sess, fnode_conn); 3622 put_device(dev); 3623 3624put_sess: 3625 put_device(&fnode_sess->dev); 3626 3627put_host: 3628 scsi_host_put(shost); 3629 3630exit_login_fnode: 3631 return err; 3632} 3633 3634static int iscsi_logout_flashnode(struct iscsi_transport *transport, 3635 struct iscsi_uevent *ev) 3636{ 3637 struct Scsi_Host *shost; 3638 struct iscsi_bus_flash_session *fnode_sess; 3639 struct iscsi_bus_flash_conn *fnode_conn; 3640 struct device *dev; 3641 uint32_t idx; 3642 int err = 0; 3643 3644 if (!transport->logout_flashnode) { 3645 err = -ENOSYS; 3646 goto exit_logout_fnode; 3647 } 3648 3649 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no); 3650 if (!shost) { 3651 pr_err("%s could not find host no %u\n", 3652 __func__, ev->u.logout_flashnode.host_no); 3653 err = -ENODEV; 3654 goto put_host; 3655 } 3656 3657 idx = ev->u.logout_flashnode.flashnode_idx; 3658 fnode_sess = iscsi_get_flashnode_by_index(shost, idx); 3659 if (!fnode_sess) { 3660 pr_err("%s could not find flashnode %u for host no %u\n", 3661 __func__, idx, ev->u.logout_flashnode.host_no); 3662 err = -ENODEV; 3663 goto put_host; 3664 } 3665 3666 dev = iscsi_find_flashnode_conn(fnode_sess); 3667 if (!dev) { 3668 err = -ENODEV; 3669 goto put_sess; 3670 } 3671 3672 fnode_conn = iscsi_dev_to_flash_conn(dev); 3673 3674 err = transport->logout_flashnode(fnode_sess, fnode_conn); 3675 put_device(dev); 3676 3677put_sess: 3678 put_device(&fnode_sess->dev); 3679 3680put_host: 3681 scsi_host_put(shost); 3682 3683exit_logout_fnode: 3684 return err; 3685} 3686 3687static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport, 3688 struct iscsi_uevent *ev) 3689{ 3690 struct Scsi_Host *shost; 3691 struct iscsi_cls_session *session; 3692 int err = 0; 3693 3694 if (!transport->logout_flashnode_sid) { 3695 err = -ENOSYS; 3696 goto exit_logout_sid; 3697 } 3698 3699 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no); 3700 if (!shost) { 3701 pr_err("%s could not find host no %u\n", 3702 __func__, ev->u.logout_flashnode.host_no); 3703 err = -ENODEV; 3704 goto put_host; 3705 } 3706 3707 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid); 3708 if (!session) { 3709 pr_err("%s could not find session id %u\n", 3710 __func__, ev->u.logout_flashnode_sid.sid); 3711 err = -EINVAL; 3712 goto put_host; 3713 } 3714 3715 err = transport->logout_flashnode_sid(session); 3716 3717put_host: 3718 scsi_host_put(shost); 3719 3720exit_logout_sid: 3721 return err; 3722} 3723 3724static int 3725iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 3726{ 3727 struct iscsi_uevent *ev = nlmsg_data(nlh); 3728 struct Scsi_Host *shost = NULL; 3729 struct iscsi_internal *priv; 3730 struct sk_buff *skbhost_stats; 3731 struct nlmsghdr *nlhhost_stats; 3732 struct iscsi_uevent *evhost_stats; 3733 int host_stats_size = 0; 3734 int len, err = 0; 3735 char *buf; 3736 3737 if (!transport->get_host_stats) 3738 return -ENOSYS; 3739 3740 priv = iscsi_if_transport_lookup(transport); 3741 if (!priv) 3742 return -EINVAL; 3743 3744 host_stats_size = sizeof(struct iscsi_offload_host_stats); 3745 len = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3746 3747 shost = scsi_host_lookup(ev->u.get_host_stats.host_no); 3748 if (!shost) { 3749 pr_err("%s: failed. Could not find host no %u\n", 3750 __func__, ev->u.get_host_stats.host_no); 3751 return -ENODEV; 3752 } 3753 3754 do { 3755 int actual_size; 3756 3757 skbhost_stats = alloc_skb(len, GFP_KERNEL); 3758 if (!skbhost_stats) { 3759 pr_err("cannot deliver host stats: OOM\n"); 3760 err = -ENOMEM; 3761 goto exit_host_stats; 3762 } 3763 3764 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0, 3765 (len - sizeof(*nlhhost_stats)), 0); 3766 evhost_stats = nlmsg_data(nlhhost_stats); 3767 memset(evhost_stats, 0, sizeof(*evhost_stats)); 3768 evhost_stats->transport_handle = iscsi_handle(transport); 3769 evhost_stats->type = nlh->nlmsg_type; 3770 evhost_stats->u.get_host_stats.host_no = 3771 ev->u.get_host_stats.host_no; 3772 buf = (char *)evhost_stats + sizeof(*evhost_stats); 3773 memset(buf, 0, host_stats_size); 3774 3775 err = transport->get_host_stats(shost, buf, host_stats_size); 3776 if (err) { 3777 kfree_skb(skbhost_stats); 3778 goto exit_host_stats; 3779 } 3780 3781 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size); 3782 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size)); 3783 nlhhost_stats->nlmsg_len = actual_size; 3784 3785 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID, 3786 GFP_KERNEL); 3787 } while (err < 0 && err != -ECONNREFUSED); 3788 3789exit_host_stats: 3790 scsi_host_put(shost); 3791 return err; 3792} 3793 3794static int iscsi_if_transport_conn(struct iscsi_transport *transport, 3795 struct nlmsghdr *nlh, u32 pdu_len) 3796{ 3797 struct iscsi_uevent *ev = nlmsg_data(nlh); 3798 struct iscsi_cls_session *session; 3799 struct iscsi_cls_conn *conn = NULL; 3800 struct iscsi_endpoint *ep; 3801 int err = 0; 3802 3803 switch (nlh->nlmsg_type) { 3804 case ISCSI_UEVENT_CREATE_CONN: 3805 return iscsi_if_create_conn(transport, ev); 3806 case ISCSI_UEVENT_DESTROY_CONN: 3807 return iscsi_if_destroy_conn(transport, ev); 3808 case ISCSI_UEVENT_STOP_CONN: 3809 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, 3810 ev->u.stop_conn.cid); 3811 if (!conn) 3812 return -EINVAL; 3813 3814 return iscsi_if_stop_conn(conn, ev->u.stop_conn.flag); 3815 } 3816 3817 /* 3818 * The following cmds need to be run under the ep_mutex so in kernel 3819 * conn cleanup (ep_disconnect + unbind and conn) is not done while 3820 * these are running. They also must not run if we have just run a conn 3821 * cleanup because they would set the state in a way that might allow 3822 * IO or send IO themselves. 3823 */ 3824 switch (nlh->nlmsg_type) { 3825 case ISCSI_UEVENT_START_CONN: 3826 conn = iscsi_conn_lookup(ev->u.start_conn.sid, 3827 ev->u.start_conn.cid); 3828 break; 3829 case ISCSI_UEVENT_BIND_CONN: 3830 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); 3831 break; 3832 case ISCSI_UEVENT_SEND_PDU: 3833 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); 3834 break; 3835 } 3836 3837 if (!conn) 3838 return -EINVAL; 3839 3840 mutex_lock(&conn->ep_mutex); 3841 spin_lock_irq(&conn->lock); 3842 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { 3843 spin_unlock_irq(&conn->lock); 3844 mutex_unlock(&conn->ep_mutex); 3845 ev->r.retcode = -ENOTCONN; 3846 return 0; 3847 } 3848 spin_unlock_irq(&conn->lock); 3849 3850 switch (nlh->nlmsg_type) { 3851 case ISCSI_UEVENT_BIND_CONN: 3852 session = iscsi_session_lookup(ev->u.b_conn.sid); 3853 if (!session) { 3854 err = -EINVAL; 3855 break; 3856 } 3857 3858 ev->r.retcode = transport->bind_conn(session, conn, 3859 ev->u.b_conn.transport_eph, 3860 ev->u.b_conn.is_leading); 3861 if (!ev->r.retcode) 3862 WRITE_ONCE(conn->state, ISCSI_CONN_BOUND); 3863 3864 if (ev->r.retcode || !transport->ep_connect) 3865 break; 3866 3867 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); 3868 if (ep) { 3869 ep->conn = conn; 3870 conn->ep = ep; 3871 iscsi_put_endpoint(ep); 3872 } else { 3873 err = -ENOTCONN; 3874 iscsi_cls_conn_printk(KERN_ERR, conn, 3875 "Could not set ep conn binding\n"); 3876 } 3877 break; 3878 case ISCSI_UEVENT_START_CONN: 3879 ev->r.retcode = transport->start_conn(conn); 3880 if (!ev->r.retcode) 3881 WRITE_ONCE(conn->state, ISCSI_CONN_UP); 3882 3883 break; 3884 case ISCSI_UEVENT_SEND_PDU: 3885 if ((ev->u.send_pdu.hdr_size > pdu_len) || 3886 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) { 3887 err = -EINVAL; 3888 break; 3889 } 3890 3891 ev->r.retcode = transport->send_pdu(conn, 3892 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)), 3893 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, 3894 ev->u.send_pdu.data_size); 3895 break; 3896 default: 3897 err = -ENOSYS; 3898 } 3899 3900 mutex_unlock(&conn->ep_mutex); 3901 return err; 3902} 3903 3904static int 3905iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 3906{ 3907 int err = 0; 3908 u32 portid; 3909 struct iscsi_uevent *ev = nlmsg_data(nlh); 3910 struct iscsi_transport *transport = NULL; 3911 struct iscsi_internal *priv; 3912 struct iscsi_cls_session *session; 3913 struct iscsi_endpoint *ep = NULL; 3914 u32 rlen; 3915 3916 if (!netlink_capable(skb, CAP_SYS_ADMIN)) 3917 return -EPERM; 3918 3919 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) 3920 *group = ISCSI_NL_GRP_UIP; 3921 else 3922 *group = ISCSI_NL_GRP_ISCSID; 3923 3924 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); 3925 if (!priv) 3926 return -EINVAL; 3927 transport = priv->iscsi_transport; 3928 3929 if (!try_module_get(transport->owner)) 3930 return -EINVAL; 3931 3932 portid = NETLINK_CB(skb).portid; 3933 3934 /* 3935 * Even though the remaining payload may not be regarded as nlattr, 3936 * (like address or something else), calculate the remaining length 3937 * here to ease following length checks. 3938 */ 3939 rlen = nlmsg_attrlen(nlh, sizeof(*ev)); 3940 3941 switch (nlh->nlmsg_type) { 3942 case ISCSI_UEVENT_CREATE_SESSION: 3943 err = iscsi_if_create_session(priv, ep, ev, 3944 portid, 3945 ev->u.c_session.initial_cmdsn, 3946 ev->u.c_session.cmds_max, 3947 ev->u.c_session.queue_depth); 3948 break; 3949 case ISCSI_UEVENT_CREATE_BOUND_SESSION: 3950 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); 3951 if (!ep) { 3952 err = -EINVAL; 3953 break; 3954 } 3955 3956 err = iscsi_if_create_session(priv, ep, ev, 3957 portid, 3958 ev->u.c_bound_session.initial_cmdsn, 3959 ev->u.c_bound_session.cmds_max, 3960 ev->u.c_bound_session.queue_depth); 3961 iscsi_put_endpoint(ep); 3962 break; 3963 case ISCSI_UEVENT_DESTROY_SESSION: 3964 session = iscsi_session_lookup(ev->u.d_session.sid); 3965 if (!session) 3966 err = -EINVAL; 3967 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3968 err = -EBUSY; 3969 else 3970 transport->destroy_session(session); 3971 break; 3972 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC: 3973 session = iscsi_session_lookup(ev->u.d_session.sid); 3974 if (!session) 3975 err = -EINVAL; 3976 else if (iscsi_session_has_conns(ev->u.d_session.sid)) 3977 err = -EBUSY; 3978 else { 3979 unsigned long flags; 3980 3981 /* Prevent this session from being found again */ 3982 spin_lock_irqsave(&sesslock, flags); 3983 list_del_init(&session->sess_list); 3984 spin_unlock_irqrestore(&sesslock, flags); 3985 3986 queue_work(system_unbound_wq, &session->destroy_work); 3987 } 3988 break; 3989 case ISCSI_UEVENT_UNBIND_SESSION: 3990 session = iscsi_session_lookup(ev->u.d_session.sid); 3991 if (session) 3992 queue_work(session->workq, &session->unbind_work); 3993 else 3994 err = -EINVAL; 3995 break; 3996 case ISCSI_UEVENT_SET_PARAM: 3997 err = iscsi_if_set_param(transport, ev, rlen); 3998 break; 3999 case ISCSI_UEVENT_CREATE_CONN: 4000 case ISCSI_UEVENT_DESTROY_CONN: 4001 case ISCSI_UEVENT_STOP_CONN: 4002 case ISCSI_UEVENT_START_CONN: 4003 case ISCSI_UEVENT_BIND_CONN: 4004 case ISCSI_UEVENT_SEND_PDU: 4005 err = iscsi_if_transport_conn(transport, nlh, rlen); 4006 break; 4007 case ISCSI_UEVENT_GET_STATS: 4008 err = iscsi_if_get_stats(transport, nlh); 4009 break; 4010 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: 4011 case ISCSI_UEVENT_TRANSPORT_EP_POLL: 4012 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: 4013 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: 4014 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type, rlen); 4015 break; 4016 case ISCSI_UEVENT_TGT_DSCVR: 4017 err = iscsi_tgt_dscvr(transport, ev, rlen); 4018 break; 4019 case ISCSI_UEVENT_SET_HOST_PARAM: 4020 err = iscsi_set_host_param(transport, ev, rlen); 4021 break; 4022 case ISCSI_UEVENT_PATH_UPDATE: 4023 err = iscsi_set_path(transport, ev, rlen); 4024 break; 4025 case ISCSI_UEVENT_SET_IFACE_PARAMS: 4026 err = iscsi_set_iface_params(transport, ev, rlen); 4027 break; 4028 case ISCSI_UEVENT_PING: 4029 err = iscsi_send_ping(transport, ev, rlen); 4030 break; 4031 case ISCSI_UEVENT_GET_CHAP: 4032 err = iscsi_get_chap(transport, nlh); 4033 break; 4034 case ISCSI_UEVENT_DELETE_CHAP: 4035 err = iscsi_delete_chap(transport, ev); 4036 break; 4037 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS: 4038 err = iscsi_set_flashnode_param(transport, ev, rlen); 4039 break; 4040 case ISCSI_UEVENT_NEW_FLASHNODE: 4041 err = iscsi_new_flashnode(transport, ev, rlen); 4042 break; 4043 case ISCSI_UEVENT_DEL_FLASHNODE: 4044 err = iscsi_del_flashnode(transport, ev); 4045 break; 4046 case ISCSI_UEVENT_LOGIN_FLASHNODE: 4047 err = iscsi_login_flashnode(transport, ev); 4048 break; 4049 case ISCSI_UEVENT_LOGOUT_FLASHNODE: 4050 err = iscsi_logout_flashnode(transport, ev); 4051 break; 4052 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID: 4053 err = iscsi_logout_flashnode_sid(transport, ev); 4054 break; 4055 case ISCSI_UEVENT_SET_CHAP: 4056 err = iscsi_set_chap(transport, ev, rlen); 4057 break; 4058 case ISCSI_UEVENT_GET_HOST_STATS: 4059 err = iscsi_get_host_stats(transport, nlh); 4060 break; 4061 default: 4062 err = -ENOSYS; 4063 break; 4064 } 4065 4066 module_put(transport->owner); 4067 return err; 4068} 4069 4070/* 4071 * Get message from skb. Each message is processed by iscsi_if_recv_msg. 4072 * Malformed skbs with wrong lengths or invalid creds are not processed. 4073 */ 4074static void 4075iscsi_if_rx(struct sk_buff *skb) 4076{ 4077 u32 portid = NETLINK_CB(skb).portid; 4078 4079 mutex_lock(&rx_queue_mutex); 4080 while (skb->len >= NLMSG_HDRLEN) { 4081 int err; 4082 uint32_t rlen; 4083 struct nlmsghdr *nlh; 4084 struct iscsi_uevent *ev; 4085 uint32_t group; 4086 int retries = ISCSI_SEND_MAX_ALLOWED; 4087 4088 nlh = nlmsg_hdr(skb); 4089 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) || 4090 skb->len < nlh->nlmsg_len) { 4091 break; 4092 } 4093 4094 ev = nlmsg_data(nlh); 4095 rlen = NLMSG_ALIGN(nlh->nlmsg_len); 4096 if (rlen > skb->len) 4097 rlen = skb->len; 4098 4099 err = iscsi_if_recv_msg(skb, nlh, &group); 4100 if (err) { 4101 ev->type = ISCSI_KEVENT_IF_ERROR; 4102 ev->iferror = err; 4103 } 4104 do { 4105 /* 4106 * special case for GET_STATS: 4107 * on success - sending reply and stats from 4108 * inside of if_recv_msg(), 4109 * on error - fall through. 4110 */ 4111 if (ev->type == ISCSI_UEVENT_GET_STATS && !err) 4112 break; 4113 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err) 4114 break; 4115 err = iscsi_if_send_reply(portid, nlh->nlmsg_type, 4116 ev, sizeof(*ev)); 4117 if (err == -EAGAIN && --retries < 0) { 4118 printk(KERN_WARNING "Send reply failed, error %d\n", err); 4119 break; 4120 } 4121 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH); 4122 skb_pull(skb, rlen); 4123 } 4124 mutex_unlock(&rx_queue_mutex); 4125} 4126 4127#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ 4128struct device_attribute dev_attr_##_prefix##_##_name = \ 4129 __ATTR(_name,_mode,_show,_store) 4130 4131/* 4132 * iSCSI connection attrs 4133 */ 4134#define iscsi_conn_attr_show(param) \ 4135static ssize_t \ 4136show_conn_param_##param(struct device *dev, \ 4137 struct device_attribute *attr, char *buf) \ 4138{ \ 4139 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4140 struct iscsi_transport *t = conn->transport; \ 4141 return t->get_conn_param(conn, param, buf); \ 4142} 4143 4144#define iscsi_conn_attr(field, param) \ 4145 iscsi_conn_attr_show(param) \ 4146static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ 4147 NULL); 4148 4149iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); 4150iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); 4151iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); 4152iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); 4153iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); 4154iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); 4155iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); 4156iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); 4157iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); 4158iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); 4159iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); 4160iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT); 4161iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN); 4162iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO); 4163iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE); 4164iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT); 4165iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE); 4166iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE); 4167iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE); 4168iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN); 4169iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE); 4170iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS); 4171iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC); 4172iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL); 4173iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6); 4174iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF); 4175iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF); 4176iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR); 4177 4178static const char *const connection_state_names[] = { 4179 [ISCSI_CONN_UP] = "up", 4180 [ISCSI_CONN_DOWN] = "down", 4181 [ISCSI_CONN_FAILED] = "failed", 4182 [ISCSI_CONN_BOUND] = "bound" 4183}; 4184 4185static ssize_t show_conn_state(struct device *dev, 4186 struct device_attribute *attr, char *buf) 4187{ 4188 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); 4189 const char *state = "unknown"; 4190 int conn_state = READ_ONCE(conn->state); 4191 4192 if (conn_state >= 0 && 4193 conn_state < ARRAY_SIZE(connection_state_names)) 4194 state = connection_state_names[conn_state]; 4195 4196 return sysfs_emit(buf, "%s\n", state); 4197} 4198static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state, 4199 NULL); 4200 4201#define iscsi_conn_ep_attr_show(param) \ 4202static ssize_t show_conn_ep_param_##param(struct device *dev, \ 4203 struct device_attribute *attr,\ 4204 char *buf) \ 4205{ \ 4206 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ 4207 struct iscsi_transport *t = conn->transport; \ 4208 struct iscsi_endpoint *ep; \ 4209 ssize_t rc; \ 4210 \ 4211 /* \ 4212 * Need to make sure ep_disconnect does not free the LLD's \ 4213 * interconnect resources while we are trying to read them. \ 4214 */ \ 4215 mutex_lock(&conn->ep_mutex); \ 4216 ep = conn->ep; \ 4217 if (!ep && t->ep_connect) { \ 4218 mutex_unlock(&conn->ep_mutex); \ 4219 return -ENOTCONN; \ 4220 } \ 4221 \ 4222 if (ep) \ 4223 rc = t->get_ep_param(ep, param, buf); \ 4224 else \ 4225 rc = t->get_conn_param(conn, param, buf); \ 4226 mutex_unlock(&conn->ep_mutex); \ 4227 return rc; \ 4228} 4229 4230#define iscsi_conn_ep_attr(field, param) \ 4231 iscsi_conn_ep_attr_show(param) \ 4232static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ 4233 show_conn_ep_param_##param, NULL); 4234 4235iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); 4236iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); 4237 4238static struct attribute *iscsi_conn_attrs[] = { 4239 &dev_attr_conn_max_recv_dlength.attr, 4240 &dev_attr_conn_max_xmit_dlength.attr, 4241 &dev_attr_conn_header_digest.attr, 4242 &dev_attr_conn_data_digest.attr, 4243 &dev_attr_conn_ifmarker.attr, 4244 &dev_attr_conn_ofmarker.attr, 4245 &dev_attr_conn_address.attr, 4246 &dev_attr_conn_port.attr, 4247 &dev_attr_conn_exp_statsn.attr, 4248 &dev_attr_conn_persistent_address.attr, 4249 &dev_attr_conn_persistent_port.attr, 4250 &dev_attr_conn_ping_tmo.attr, 4251 &dev_attr_conn_recv_tmo.attr, 4252 &dev_attr_conn_local_port.attr, 4253 &dev_attr_conn_statsn.attr, 4254 &dev_attr_conn_keepalive_tmo.attr, 4255 &dev_attr_conn_max_segment_size.attr, 4256 &dev_attr_conn_tcp_timestamp_stat.attr, 4257 &dev_attr_conn_tcp_wsf_disable.attr, 4258 &dev_attr_conn_tcp_nagle_disable.attr, 4259 &dev_attr_conn_tcp_timer_scale.attr, 4260 &dev_attr_conn_tcp_timestamp_enable.attr, 4261 &dev_attr_conn_fragment_disable.attr, 4262 &dev_attr_conn_ipv4_tos.attr, 4263 &dev_attr_conn_ipv6_traffic_class.attr, 4264 &dev_attr_conn_ipv6_flow_label.attr, 4265 &dev_attr_conn_is_fw_assigned_ipv6.attr, 4266 &dev_attr_conn_tcp_xmit_wsf.attr, 4267 &dev_attr_conn_tcp_recv_wsf.attr, 4268 &dev_attr_conn_local_ipaddr.attr, 4269 &dev_attr_conn_state.attr, 4270 NULL, 4271}; 4272 4273static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, 4274 struct attribute *attr, int i) 4275{ 4276 struct device *cdev = container_of(kobj, struct device, kobj); 4277 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); 4278 struct iscsi_transport *t = conn->transport; 4279 int param; 4280 4281 if (attr == &dev_attr_conn_max_recv_dlength.attr) 4282 param = ISCSI_PARAM_MAX_RECV_DLENGTH; 4283 else if (attr == &dev_attr_conn_max_xmit_dlength.attr) 4284 param = ISCSI_PARAM_MAX_XMIT_DLENGTH; 4285 else if (attr == &dev_attr_conn_header_digest.attr) 4286 param = ISCSI_PARAM_HDRDGST_EN; 4287 else if (attr == &dev_attr_conn_data_digest.attr) 4288 param = ISCSI_PARAM_DATADGST_EN; 4289 else if (attr == &dev_attr_conn_ifmarker.attr) 4290 param = ISCSI_PARAM_IFMARKER_EN; 4291 else if (attr == &dev_attr_conn_ofmarker.attr) 4292 param = ISCSI_PARAM_OFMARKER_EN; 4293 else if (attr == &dev_attr_conn_address.attr) 4294 param = ISCSI_PARAM_CONN_ADDRESS; 4295 else if (attr == &dev_attr_conn_port.attr) 4296 param = ISCSI_PARAM_CONN_PORT; 4297 else if (attr == &dev_attr_conn_exp_statsn.attr) 4298 param = ISCSI_PARAM_EXP_STATSN; 4299 else if (attr == &dev_attr_conn_persistent_address.attr) 4300 param = ISCSI_PARAM_PERSISTENT_ADDRESS; 4301 else if (attr == &dev_attr_conn_persistent_port.attr) 4302 param = ISCSI_PARAM_PERSISTENT_PORT; 4303 else if (attr == &dev_attr_conn_ping_tmo.attr) 4304 param = ISCSI_PARAM_PING_TMO; 4305 else if (attr == &dev_attr_conn_recv_tmo.attr) 4306 param = ISCSI_PARAM_RECV_TMO; 4307 else if (attr == &dev_attr_conn_local_port.attr) 4308 param = ISCSI_PARAM_LOCAL_PORT; 4309 else if (attr == &dev_attr_conn_statsn.attr) 4310 param = ISCSI_PARAM_STATSN; 4311 else if (attr == &dev_attr_conn_keepalive_tmo.attr) 4312 param = ISCSI_PARAM_KEEPALIVE_TMO; 4313 else if (attr == &dev_attr_conn_max_segment_size.attr) 4314 param = ISCSI_PARAM_MAX_SEGMENT_SIZE; 4315 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr) 4316 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT; 4317 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr) 4318 param = ISCSI_PARAM_TCP_WSF_DISABLE; 4319 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr) 4320 param = ISCSI_PARAM_TCP_NAGLE_DISABLE; 4321 else if (attr == &dev_attr_conn_tcp_timer_scale.attr) 4322 param = ISCSI_PARAM_TCP_TIMER_SCALE; 4323 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr) 4324 param = ISCSI_PARAM_TCP_TIMESTAMP_EN; 4325 else if (attr == &dev_attr_conn_fragment_disable.attr) 4326 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE; 4327 else if (attr == &dev_attr_conn_ipv4_tos.attr) 4328 param = ISCSI_PARAM_IPV4_TOS; 4329 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr) 4330 param = ISCSI_PARAM_IPV6_TC; 4331 else if (attr == &dev_attr_conn_ipv6_flow_label.attr) 4332 param = ISCSI_PARAM_IPV6_FLOW_LABEL; 4333 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr) 4334 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6; 4335 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr) 4336 param = ISCSI_PARAM_TCP_XMIT_WSF; 4337 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr) 4338 param = ISCSI_PARAM_TCP_RECV_WSF; 4339 else if (attr == &dev_attr_conn_local_ipaddr.attr) 4340 param = ISCSI_PARAM_LOCAL_IPADDR; 4341 else if (attr == &dev_attr_conn_state.attr) 4342 return S_IRUGO; 4343 else { 4344 WARN_ONCE(1, "Invalid conn attr"); 4345 return 0; 4346 } 4347 4348 return t->attr_is_visible(ISCSI_PARAM, param); 4349} 4350 4351static struct attribute_group iscsi_conn_group = { 4352 .attrs = iscsi_conn_attrs, 4353 .is_visible = iscsi_conn_attr_is_visible, 4354}; 4355 4356/* 4357 * iSCSI session attrs 4358 */ 4359#define iscsi_session_attr_show(param, perm) \ 4360static ssize_t \ 4361show_session_param_##param(struct device *dev, \ 4362 struct device_attribute *attr, char *buf) \ 4363{ \ 4364 struct iscsi_cls_session *session = \ 4365 iscsi_dev_to_session(dev->parent); \ 4366 struct iscsi_transport *t = session->transport; \ 4367 \ 4368 if (perm && !capable(CAP_SYS_ADMIN)) \ 4369 return -EACCES; \ 4370 return t->get_session_param(session, param, buf); \ 4371} 4372 4373#define iscsi_session_attr(field, param, perm) \ 4374 iscsi_session_attr_show(param, perm) \ 4375static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ 4376 NULL); 4377iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); 4378iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); 4379iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); 4380iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); 4381iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); 4382iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); 4383iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); 4384iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); 4385iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); 4386iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); 4387iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); 4388iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); 4389iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); 4390iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); 4391iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1); 4392iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1); 4393iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); 4394iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); 4395iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); 4396iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); 4397iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); 4398iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); 4399iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); 4400iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0); 4401iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0); 4402iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0); 4403iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0); 4404iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0); 4405iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0); 4406iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0); 4407iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0); 4408iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0); 4409iscsi_session_attr(discovery_auth_optional, 4410 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0); 4411iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0); 4412iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0); 4413iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0); 4414iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0); 4415iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0); 4416iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0); 4417iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0); 4418 4419static ssize_t 4420show_priv_session_target_state(struct device *dev, struct device_attribute *attr, 4421 char *buf) 4422{ 4423 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4424 4425 return sysfs_emit(buf, "%s\n", 4426 iscsi_session_target_state_name[session->target_state]); 4427} 4428 4429static ISCSI_CLASS_ATTR(priv_sess, target_state, S_IRUGO, 4430 show_priv_session_target_state, NULL); 4431 4432static ssize_t 4433show_priv_session_state(struct device *dev, struct device_attribute *attr, 4434 char *buf) 4435{ 4436 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4437 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state)); 4438} 4439static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, 4440 NULL); 4441static ssize_t 4442show_priv_session_creator(struct device *dev, struct device_attribute *attr, 4443 char *buf) 4444{ 4445 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4446 return sysfs_emit(buf, "%d\n", session->creator); 4447} 4448static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, 4449 NULL); 4450static ssize_t 4451show_priv_session_target_id(struct device *dev, struct device_attribute *attr, 4452 char *buf) 4453{ 4454 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); 4455 return sysfs_emit(buf, "%d\n", session->target_id); 4456} 4457static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO, 4458 show_priv_session_target_id, NULL); 4459 4460#define iscsi_priv_session_attr_show(field, format) \ 4461static ssize_t \ 4462show_priv_session_##field(struct device *dev, \ 4463 struct device_attribute *attr, char *buf) \ 4464{ \ 4465 struct iscsi_cls_session *session = \ 4466 iscsi_dev_to_session(dev->parent); \ 4467 if (session->field == -1) \ 4468 return sysfs_emit(buf, "off\n"); \ 4469 return sysfs_emit(buf, format"\n", session->field); \ 4470} 4471 4472#define iscsi_priv_session_attr_store(field) \ 4473static ssize_t \ 4474store_priv_session_##field(struct device *dev, \ 4475 struct device_attribute *attr, \ 4476 const char *buf, size_t count) \ 4477{ \ 4478 int val; \ 4479 char *cp; \ 4480 struct iscsi_cls_session *session = \ 4481 iscsi_dev_to_session(dev->parent); \ 4482 if ((session->state == ISCSI_SESSION_FREE) || \ 4483 (session->state == ISCSI_SESSION_FAILED)) \ 4484 return -EBUSY; \ 4485 if (strncmp(buf, "off", 3) == 0) { \ 4486 session->field = -1; \ 4487 session->field##_sysfs_override = true; \ 4488 } else { \ 4489 val = simple_strtoul(buf, &cp, 0); \ 4490 if (*cp != '\0' && *cp != '\n') \ 4491 return -EINVAL; \ 4492 session->field = val; \ 4493 session->field##_sysfs_override = true; \ 4494 } \ 4495 return count; \ 4496} 4497 4498#define iscsi_priv_session_rw_attr(field, format) \ 4499 iscsi_priv_session_attr_show(field, format) \ 4500 iscsi_priv_session_attr_store(field) \ 4501static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ 4502 show_priv_session_##field, \ 4503 store_priv_session_##field) 4504 4505iscsi_priv_session_rw_attr(recovery_tmo, "%d"); 4506 4507static struct attribute *iscsi_session_attrs[] = { 4508 &dev_attr_sess_initial_r2t.attr, 4509 &dev_attr_sess_max_outstanding_r2t.attr, 4510 &dev_attr_sess_immediate_data.attr, 4511 &dev_attr_sess_first_burst_len.attr, 4512 &dev_attr_sess_max_burst_len.attr, 4513 &dev_attr_sess_data_pdu_in_order.attr, 4514 &dev_attr_sess_data_seq_in_order.attr, 4515 &dev_attr_sess_erl.attr, 4516 &dev_attr_sess_targetname.attr, 4517 &dev_attr_sess_tpgt.attr, 4518 &dev_attr_sess_password.attr, 4519 &dev_attr_sess_password_in.attr, 4520 &dev_attr_sess_username.attr, 4521 &dev_attr_sess_username_in.attr, 4522 &dev_attr_sess_fast_abort.attr, 4523 &dev_attr_sess_abort_tmo.attr, 4524 &dev_attr_sess_lu_reset_tmo.attr, 4525 &dev_attr_sess_tgt_reset_tmo.attr, 4526 &dev_attr_sess_ifacename.attr, 4527 &dev_attr_sess_initiatorname.attr, 4528 &dev_attr_sess_targetalias.attr, 4529 &dev_attr_sess_boot_root.attr, 4530 &dev_attr_sess_boot_nic.attr, 4531 &dev_attr_sess_boot_target.attr, 4532 &dev_attr_priv_sess_recovery_tmo.attr, 4533 &dev_attr_priv_sess_state.attr, 4534 &dev_attr_priv_sess_target_state.attr, 4535 &dev_attr_priv_sess_creator.attr, 4536 &dev_attr_sess_chap_out_idx.attr, 4537 &dev_attr_sess_chap_in_idx.attr, 4538 &dev_attr_priv_sess_target_id.attr, 4539 &dev_attr_sess_auto_snd_tgt_disable.attr, 4540 &dev_attr_sess_discovery_session.attr, 4541 &dev_attr_sess_portal_type.attr, 4542 &dev_attr_sess_chap_auth.attr, 4543 &dev_attr_sess_discovery_logout.attr, 4544 &dev_attr_sess_bidi_chap.attr, 4545 &dev_attr_sess_discovery_auth_optional.attr, 4546 &dev_attr_sess_def_time2wait.attr, 4547 &dev_attr_sess_def_time2retain.attr, 4548 &dev_attr_sess_isid.attr, 4549 &dev_attr_sess_tsid.attr, 4550 &dev_attr_sess_def_taskmgmt_tmo.attr, 4551 &dev_attr_sess_discovery_parent_idx.attr, 4552 &dev_attr_sess_discovery_parent_type.attr, 4553 NULL, 4554}; 4555 4556static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, 4557 struct attribute *attr, int i) 4558{ 4559 struct device *cdev = container_of(kobj, struct device, kobj); 4560 struct iscsi_cls_session *session = transport_class_to_session(cdev); 4561 struct iscsi_transport *t = session->transport; 4562 int param; 4563 4564 if (attr == &dev_attr_sess_initial_r2t.attr) 4565 param = ISCSI_PARAM_INITIAL_R2T_EN; 4566 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) 4567 param = ISCSI_PARAM_MAX_R2T; 4568 else if (attr == &dev_attr_sess_immediate_data.attr) 4569 param = ISCSI_PARAM_IMM_DATA_EN; 4570 else if (attr == &dev_attr_sess_first_burst_len.attr) 4571 param = ISCSI_PARAM_FIRST_BURST; 4572 else if (attr == &dev_attr_sess_max_burst_len.attr) 4573 param = ISCSI_PARAM_MAX_BURST; 4574 else if (attr == &dev_attr_sess_data_pdu_in_order.attr) 4575 param = ISCSI_PARAM_PDU_INORDER_EN; 4576 else if (attr == &dev_attr_sess_data_seq_in_order.attr) 4577 param = ISCSI_PARAM_DATASEQ_INORDER_EN; 4578 else if (attr == &dev_attr_sess_erl.attr) 4579 param = ISCSI_PARAM_ERL; 4580 else if (attr == &dev_attr_sess_targetname.attr) 4581 param = ISCSI_PARAM_TARGET_NAME; 4582 else if (attr == &dev_attr_sess_tpgt.attr) 4583 param = ISCSI_PARAM_TPGT; 4584 else if (attr == &dev_attr_sess_chap_in_idx.attr) 4585 param = ISCSI_PARAM_CHAP_IN_IDX; 4586 else if (attr == &dev_attr_sess_chap_out_idx.attr) 4587 param = ISCSI_PARAM_CHAP_OUT_IDX; 4588 else if (attr == &dev_attr_sess_password.attr) 4589 param = ISCSI_PARAM_USERNAME; 4590 else if (attr == &dev_attr_sess_password_in.attr) 4591 param = ISCSI_PARAM_USERNAME_IN; 4592 else if (attr == &dev_attr_sess_username.attr) 4593 param = ISCSI_PARAM_PASSWORD; 4594 else if (attr == &dev_attr_sess_username_in.attr) 4595 param = ISCSI_PARAM_PASSWORD_IN; 4596 else if (attr == &dev_attr_sess_fast_abort.attr) 4597 param = ISCSI_PARAM_FAST_ABORT; 4598 else if (attr == &dev_attr_sess_abort_tmo.attr) 4599 param = ISCSI_PARAM_ABORT_TMO; 4600 else if (attr == &dev_attr_sess_lu_reset_tmo.attr) 4601 param = ISCSI_PARAM_LU_RESET_TMO; 4602 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) 4603 param = ISCSI_PARAM_TGT_RESET_TMO; 4604 else if (attr == &dev_attr_sess_ifacename.attr) 4605 param = ISCSI_PARAM_IFACE_NAME; 4606 else if (attr == &dev_attr_sess_initiatorname.attr) 4607 param = ISCSI_PARAM_INITIATOR_NAME; 4608 else if (attr == &dev_attr_sess_targetalias.attr) 4609 param = ISCSI_PARAM_TARGET_ALIAS; 4610 else if (attr == &dev_attr_sess_boot_root.attr) 4611 param = ISCSI_PARAM_BOOT_ROOT; 4612 else if (attr == &dev_attr_sess_boot_nic.attr) 4613 param = ISCSI_PARAM_BOOT_NIC; 4614 else if (attr == &dev_attr_sess_boot_target.attr) 4615 param = ISCSI_PARAM_BOOT_TARGET; 4616 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr) 4617 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE; 4618 else if (attr == &dev_attr_sess_discovery_session.attr) 4619 param = ISCSI_PARAM_DISCOVERY_SESS; 4620 else if (attr == &dev_attr_sess_portal_type.attr) 4621 param = ISCSI_PARAM_PORTAL_TYPE; 4622 else if (attr == &dev_attr_sess_chap_auth.attr) 4623 param = ISCSI_PARAM_CHAP_AUTH_EN; 4624 else if (attr == &dev_attr_sess_discovery_logout.attr) 4625 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN; 4626 else if (attr == &dev_attr_sess_bidi_chap.attr) 4627 param = ISCSI_PARAM_BIDI_CHAP_EN; 4628 else if (attr == &dev_attr_sess_discovery_auth_optional.attr) 4629 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL; 4630 else if (attr == &dev_attr_sess_def_time2wait.attr) 4631 param = ISCSI_PARAM_DEF_TIME2WAIT; 4632 else if (attr == &dev_attr_sess_def_time2retain.attr) 4633 param = ISCSI_PARAM_DEF_TIME2RETAIN; 4634 else if (attr == &dev_attr_sess_isid.attr) 4635 param = ISCSI_PARAM_ISID; 4636 else if (attr == &dev_attr_sess_tsid.attr) 4637 param = ISCSI_PARAM_TSID; 4638 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr) 4639 param = ISCSI_PARAM_DEF_TASKMGMT_TMO; 4640 else if (attr == &dev_attr_sess_discovery_parent_idx.attr) 4641 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX; 4642 else if (attr == &dev_attr_sess_discovery_parent_type.attr) 4643 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE; 4644 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) 4645 return S_IRUGO | S_IWUSR; 4646 else if (attr == &dev_attr_priv_sess_state.attr) 4647 return S_IRUGO; 4648 else if (attr == &dev_attr_priv_sess_target_state.attr) 4649 return S_IRUGO; 4650 else if (attr == &dev_attr_priv_sess_creator.attr) 4651 return S_IRUGO; 4652 else if (attr == &dev_attr_priv_sess_target_id.attr) 4653 return S_IRUGO; 4654 else { 4655 WARN_ONCE(1, "Invalid session attr"); 4656 return 0; 4657 } 4658 4659 return t->attr_is_visible(ISCSI_PARAM, param); 4660} 4661 4662static struct attribute_group iscsi_session_group = { 4663 .attrs = iscsi_session_attrs, 4664 .is_visible = iscsi_session_attr_is_visible, 4665}; 4666 4667/* 4668 * iSCSI host attrs 4669 */ 4670#define iscsi_host_attr_show(param) \ 4671static ssize_t \ 4672show_host_param_##param(struct device *dev, \ 4673 struct device_attribute *attr, char *buf) \ 4674{ \ 4675 struct Scsi_Host *shost = transport_class_to_shost(dev); \ 4676 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ 4677 return priv->iscsi_transport->get_host_param(shost, param, buf); \ 4678} 4679 4680#define iscsi_host_attr(field, param) \ 4681 iscsi_host_attr_show(param) \ 4682static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ 4683 NULL); 4684 4685iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); 4686iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); 4687iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); 4688iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); 4689iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE); 4690iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED); 4691 4692static struct attribute *iscsi_host_attrs[] = { 4693 &dev_attr_host_netdev.attr, 4694 &dev_attr_host_hwaddress.attr, 4695 &dev_attr_host_ipaddress.attr, 4696 &dev_attr_host_initiatorname.attr, 4697 &dev_attr_host_port_state.attr, 4698 &dev_attr_host_port_speed.attr, 4699 NULL, 4700}; 4701 4702static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, 4703 struct attribute *attr, int i) 4704{ 4705 struct device *cdev = container_of(kobj, struct device, kobj); 4706 struct Scsi_Host *shost = transport_class_to_shost(cdev); 4707 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); 4708 int param; 4709 4710 if (attr == &dev_attr_host_netdev.attr) 4711 param = ISCSI_HOST_PARAM_NETDEV_NAME; 4712 else if (attr == &dev_attr_host_hwaddress.attr) 4713 param = ISCSI_HOST_PARAM_HWADDRESS; 4714 else if (attr == &dev_attr_host_ipaddress.attr) 4715 param = ISCSI_HOST_PARAM_IPADDRESS; 4716 else if (attr == &dev_attr_host_initiatorname.attr) 4717 param = ISCSI_HOST_PARAM_INITIATOR_NAME; 4718 else if (attr == &dev_attr_host_port_state.attr) 4719 param = ISCSI_HOST_PARAM_PORT_STATE; 4720 else if (attr == &dev_attr_host_port_speed.attr) 4721 param = ISCSI_HOST_PARAM_PORT_SPEED; 4722 else { 4723 WARN_ONCE(1, "Invalid host attr"); 4724 return 0; 4725 } 4726 4727 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); 4728} 4729 4730static struct attribute_group iscsi_host_group = { 4731 .attrs = iscsi_host_attrs, 4732 .is_visible = iscsi_host_attr_is_visible, 4733}; 4734 4735/* convert iscsi_port_speed values to ascii string name */ 4736static const struct { 4737 enum iscsi_port_speed value; 4738 char *name; 4739} iscsi_port_speed_names[] = { 4740 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" }, 4741 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" }, 4742 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" }, 4743 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" }, 4744 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" }, 4745 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" }, 4746 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" }, 4747}; 4748 4749char *iscsi_get_port_speed_name(struct Scsi_Host *shost) 4750{ 4751 int i; 4752 char *speed = "Unknown!"; 4753 struct iscsi_cls_host *ihost = shost->shost_data; 4754 uint32_t port_speed = ihost->port_speed; 4755 4756 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) { 4757 if (iscsi_port_speed_names[i].value & port_speed) { 4758 speed = iscsi_port_speed_names[i].name; 4759 break; 4760 } 4761 } 4762 return speed; 4763} 4764EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name); 4765 4766/* convert iscsi_port_state values to ascii string name */ 4767static const struct { 4768 enum iscsi_port_state value; 4769 char *name; 4770} iscsi_port_state_names[] = { 4771 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" }, 4772 {ISCSI_PORT_STATE_UP, "LINK UP" }, 4773}; 4774 4775char *iscsi_get_port_state_name(struct Scsi_Host *shost) 4776{ 4777 int i; 4778 char *state = "Unknown!"; 4779 struct iscsi_cls_host *ihost = shost->shost_data; 4780 uint32_t port_state = ihost->port_state; 4781 4782 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) { 4783 if (iscsi_port_state_names[i].value & port_state) { 4784 state = iscsi_port_state_names[i].name; 4785 break; 4786 } 4787 } 4788 return state; 4789} 4790EXPORT_SYMBOL_GPL(iscsi_get_port_state_name); 4791 4792static int iscsi_session_match(struct attribute_container *cont, 4793 struct device *dev) 4794{ 4795 struct iscsi_cls_session *session; 4796 struct Scsi_Host *shost; 4797 struct iscsi_internal *priv; 4798 4799 if (!iscsi_is_session_dev(dev)) 4800 return 0; 4801 4802 session = iscsi_dev_to_session(dev); 4803 shost = iscsi_session_to_shost(session); 4804 if (!shost->transportt) 4805 return 0; 4806 4807 priv = to_iscsi_internal(shost->transportt); 4808 if (priv->session_cont.ac.class != &iscsi_session_class.class) 4809 return 0; 4810 4811 return &priv->session_cont.ac == cont; 4812} 4813 4814static int iscsi_conn_match(struct attribute_container *cont, 4815 struct device *dev) 4816{ 4817 struct iscsi_cls_session *session; 4818 struct iscsi_cls_conn *conn; 4819 struct Scsi_Host *shost; 4820 struct iscsi_internal *priv; 4821 4822 if (!iscsi_is_conn_dev(dev)) 4823 return 0; 4824 4825 conn = iscsi_dev_to_conn(dev); 4826 session = iscsi_dev_to_session(conn->dev.parent); 4827 shost = iscsi_session_to_shost(session); 4828 4829 if (!shost->transportt) 4830 return 0; 4831 4832 priv = to_iscsi_internal(shost->transportt); 4833 if (priv->conn_cont.ac.class != &iscsi_connection_class.class) 4834 return 0; 4835 4836 return &priv->conn_cont.ac == cont; 4837} 4838 4839static int iscsi_host_match(struct attribute_container *cont, 4840 struct device *dev) 4841{ 4842 struct Scsi_Host *shost; 4843 struct iscsi_internal *priv; 4844 4845 if (!scsi_is_host_device(dev)) 4846 return 0; 4847 4848 shost = dev_to_shost(dev); 4849 if (!shost->transportt || 4850 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) 4851 return 0; 4852 4853 priv = to_iscsi_internal(shost->transportt); 4854 return &priv->t.host_attrs.ac == cont; 4855} 4856 4857struct scsi_transport_template * 4858iscsi_register_transport(struct iscsi_transport *tt) 4859{ 4860 struct iscsi_internal *priv; 4861 unsigned long flags; 4862 int err; 4863 4864 BUG_ON(!tt); 4865 WARN_ON(tt->ep_disconnect && !tt->unbind_conn); 4866 4867 priv = iscsi_if_transport_lookup(tt); 4868 if (priv) 4869 return NULL; 4870 4871 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 4872 if (!priv) 4873 return NULL; 4874 INIT_LIST_HEAD(&priv->list); 4875 priv->iscsi_transport = tt; 4876 priv->t.user_scan = iscsi_user_scan; 4877 4878 priv->dev.class = &iscsi_transport_class; 4879 dev_set_name(&priv->dev, "%s", tt->name); 4880 err = device_register(&priv->dev); 4881 if (err) 4882 goto put_dev; 4883 4884 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); 4885 if (err) 4886 goto unregister_dev; 4887 4888 /* host parameters */ 4889 priv->t.host_attrs.ac.class = &iscsi_host_class.class; 4890 priv->t.host_attrs.ac.match = iscsi_host_match; 4891 priv->t.host_attrs.ac.grp = &iscsi_host_group; 4892 priv->t.host_size = sizeof(struct iscsi_cls_host); 4893 transport_container_register(&priv->t.host_attrs); 4894 4895 /* connection parameters */ 4896 priv->conn_cont.ac.class = &iscsi_connection_class.class; 4897 priv->conn_cont.ac.match = iscsi_conn_match; 4898 priv->conn_cont.ac.grp = &iscsi_conn_group; 4899 transport_container_register(&priv->conn_cont); 4900 4901 /* session parameters */ 4902 priv->session_cont.ac.class = &iscsi_session_class.class; 4903 priv->session_cont.ac.match = iscsi_session_match; 4904 priv->session_cont.ac.grp = &iscsi_session_group; 4905 transport_container_register(&priv->session_cont); 4906 4907 spin_lock_irqsave(&iscsi_transport_lock, flags); 4908 list_add(&priv->list, &iscsi_transports); 4909 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4910 4911 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); 4912 return &priv->t; 4913 4914unregister_dev: 4915 device_unregister(&priv->dev); 4916 return NULL; 4917put_dev: 4918 put_device(&priv->dev); 4919 return NULL; 4920} 4921EXPORT_SYMBOL_GPL(iscsi_register_transport); 4922 4923void iscsi_unregister_transport(struct iscsi_transport *tt) 4924{ 4925 struct iscsi_internal *priv; 4926 unsigned long flags; 4927 4928 BUG_ON(!tt); 4929 4930 mutex_lock(&rx_queue_mutex); 4931 4932 priv = iscsi_if_transport_lookup(tt); 4933 BUG_ON (!priv); 4934 4935 spin_lock_irqsave(&iscsi_transport_lock, flags); 4936 list_del(&priv->list); 4937 spin_unlock_irqrestore(&iscsi_transport_lock, flags); 4938 4939 transport_container_unregister(&priv->conn_cont); 4940 transport_container_unregister(&priv->session_cont); 4941 transport_container_unregister(&priv->t.host_attrs); 4942 4943 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); 4944 device_unregister(&priv->dev); 4945 mutex_unlock(&rx_queue_mutex); 4946} 4947EXPORT_SYMBOL_GPL(iscsi_unregister_transport); 4948 4949void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), 4950 struct device *dev, const char *fmt, ...) 4951{ 4952 struct va_format vaf; 4953 va_list args; 4954 4955 va_start(args, fmt); 4956 vaf.fmt = fmt; 4957 vaf.va = &args; 4958 trace(dev, &vaf); 4959 va_end(args); 4960} 4961EXPORT_SYMBOL_GPL(iscsi_dbg_trace); 4962 4963static __init int iscsi_transport_init(void) 4964{ 4965 int err; 4966 struct netlink_kernel_cfg cfg = { 4967 .groups = 1, 4968 .input = iscsi_if_rx, 4969 }; 4970 printk(KERN_INFO "Loading iSCSI transport class v%s.\n", 4971 ISCSI_TRANSPORT_VERSION); 4972 4973 atomic_set(&iscsi_session_nr, 0); 4974 4975 err = class_register(&iscsi_transport_class); 4976 if (err) 4977 return err; 4978 4979 err = class_register(&iscsi_endpoint_class); 4980 if (err) 4981 goto unregister_transport_class; 4982 4983 err = class_register(&iscsi_iface_class); 4984 if (err) 4985 goto unregister_endpoint_class; 4986 4987 err = transport_class_register(&iscsi_host_class); 4988 if (err) 4989 goto unregister_iface_class; 4990 4991 err = transport_class_register(&iscsi_connection_class); 4992 if (err) 4993 goto unregister_host_class; 4994 4995 err = transport_class_register(&iscsi_session_class); 4996 if (err) 4997 goto unregister_conn_class; 4998 4999 err = bus_register(&iscsi_flashnode_bus); 5000 if (err) 5001 goto unregister_session_class; 5002 5003 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg); 5004 if (!nls) { 5005 err = -ENOBUFS; 5006 goto unregister_flashnode_bus; 5007 } 5008 5009 iscsi_conn_cleanup_workq = alloc_workqueue("%s", 5010 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0, 5011 "iscsi_conn_cleanup"); 5012 if (!iscsi_conn_cleanup_workq) { 5013 err = -ENOMEM; 5014 goto release_nls; 5015 } 5016 5017 return 0; 5018 5019release_nls: 5020 netlink_kernel_release(nls); 5021unregister_flashnode_bus: 5022 bus_unregister(&iscsi_flashnode_bus); 5023unregister_session_class: 5024 transport_class_unregister(&iscsi_session_class); 5025unregister_conn_class: 5026 transport_class_unregister(&iscsi_connection_class); 5027unregister_host_class: 5028 transport_class_unregister(&iscsi_host_class); 5029unregister_iface_class: 5030 class_unregister(&iscsi_iface_class); 5031unregister_endpoint_class: 5032 class_unregister(&iscsi_endpoint_class); 5033unregister_transport_class: 5034 class_unregister(&iscsi_transport_class); 5035 return err; 5036} 5037 5038static void __exit iscsi_transport_exit(void) 5039{ 5040 destroy_workqueue(iscsi_conn_cleanup_workq); 5041 netlink_kernel_release(nls); 5042 bus_unregister(&iscsi_flashnode_bus); 5043 transport_class_unregister(&iscsi_connection_class); 5044 transport_class_unregister(&iscsi_session_class); 5045 transport_class_unregister(&iscsi_host_class); 5046 class_unregister(&iscsi_endpoint_class); 5047 class_unregister(&iscsi_iface_class); 5048 class_unregister(&iscsi_transport_class); 5049} 5050 5051module_init(iscsi_transport_init); 5052module_exit(iscsi_transport_exit); 5053 5054MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " 5055 "Dmitry Yusupov <dmitry_yus@yahoo.com>, " 5056 "Alex Aizman <itn780@yahoo.com>"); 5057MODULE_DESCRIPTION("iSCSI Transport Interface"); 5058MODULE_LICENSE("GPL"); 5059MODULE_VERSION(ISCSI_TRANSPORT_VERSION); 5060MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); 5061