1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * iSCSI transport class definitions
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
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>
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>
25 #define ISCSI_TRANSPORT_VERSION "2.0-870"
27 #define ISCSI_SEND_MAX_ALLOWED 10
29 #define CREATE_TRACE_POINTS
30 #include <trace/events/iscsi.h>
33 * Export tracepoint symbols to be used by other modules.
35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);
36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);
37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);
38 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);
39 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);
41 static int dbg_session;
42 module_param_named(debug_session, dbg_session, int,
44 MODULE_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 "
50 module_param_named(debug_conn, dbg_conn, int,
52 MODULE_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 "
57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
60 iscsi_cls_session_printk(KERN_INFO, _session, \
63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \
65 "%s " dbg_fmt, __func__, ##arg); \
68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
71 iscsi_cls_conn_printk(KERN_INFO, _conn, \
74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \
76 "%s " dbg_fmt, __func__, ##arg); \
79 struct iscsi_internal {
80 struct scsi_transport_template t;
81 struct iscsi_transport *iscsi_transport;
82 struct list_head list;
85 struct transport_container conn_cont;
86 struct transport_container session_cont;
89 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
90 static struct workqueue_struct *iscsi_eh_timer_workq;
92 static struct workqueue_struct *iscsi_conn_cleanup_workq;
94 static DEFINE_IDA(iscsi_sess_ida);
96 * list of registered transports and lock that must
97 * be held while accessing list. The iscsi_transport_lock must
98 * be acquired after the rx_queue_mutex.
100 static LIST_HEAD(iscsi_transports);
101 static DEFINE_SPINLOCK(iscsi_transport_lock);
103 #define to_iscsi_internal(tmpl) \
104 container_of(tmpl, struct iscsi_internal, t)
106 #define dev_to_iscsi_internal(_dev) \
107 container_of(_dev, struct iscsi_internal, dev)
109 static void iscsi_transport_release(struct device *dev)
111 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
116 * iscsi_transport_class represents the iscsi_transports that are
119 static struct class iscsi_transport_class = {
120 .name = "iscsi_transport",
121 .dev_release = iscsi_transport_release,
125 show_transport_handle(struct device *dev, struct device_attribute *attr,
128 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
130 if (!capable(CAP_SYS_ADMIN))
132 return sysfs_emit(buf, "%llu\n",
133 (unsigned long long)iscsi_handle(priv->iscsi_transport));
135 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
137 #define show_transport_attr(name, format) \
139 show_transport_##name(struct device *dev, \
140 struct device_attribute *attr,char *buf) \
142 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
143 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
145 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
147 show_transport_attr(caps, "0x%x");
149 static struct attribute *iscsi_transport_attrs[] = {
150 &dev_attr_handle.attr,
155 static struct attribute_group iscsi_transport_group = {
156 .attrs = iscsi_transport_attrs,
160 * iSCSI endpoint attrs
162 #define iscsi_dev_to_endpoint(_dev) \
163 container_of(_dev, struct iscsi_endpoint, dev)
165 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
166 struct device_attribute dev_attr_##_prefix##_##_name = \
167 __ATTR(_name,_mode,_show,_store)
169 static void iscsi_endpoint_release(struct device *dev)
171 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
175 static struct class iscsi_endpoint_class = {
176 .name = "iscsi_endpoint",
177 .dev_release = iscsi_endpoint_release,
181 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
183 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
184 return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id);
186 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
188 static struct attribute *iscsi_endpoint_attrs[] = {
189 &dev_attr_ep_handle.attr,
193 static struct attribute_group iscsi_endpoint_group = {
194 .attrs = iscsi_endpoint_attrs,
197 #define ISCSI_MAX_EPID -1
199 static int iscsi_match_epid(struct device *dev, const void *data)
201 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
202 const uint64_t *epid = data;
204 return *epid == ep->id;
207 struct iscsi_endpoint *
208 iscsi_create_endpoint(int dd_size)
211 struct iscsi_endpoint *ep;
215 for (id = 1; id < ISCSI_MAX_EPID; id++) {
216 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
223 if (id == ISCSI_MAX_EPID) {
224 printk(KERN_ERR "Too many connections. Max supported %u\n",
229 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
234 ep->dev.class = &iscsi_endpoint_class;
235 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
236 err = device_register(&ep->dev);
240 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
245 ep->dd_data = &ep[1];
249 device_unregister(&ep->dev);
256 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
258 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
260 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
261 device_unregister(&ep->dev);
263 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
265 void iscsi_put_endpoint(struct iscsi_endpoint *ep)
267 put_device(&ep->dev);
269 EXPORT_SYMBOL_GPL(iscsi_put_endpoint);
272 * iscsi_lookup_endpoint - get ep from handle
273 * @handle: endpoint handle
275 * Caller must do a iscsi_put_endpoint.
277 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
281 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
286 return iscsi_dev_to_endpoint(dev);
288 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
291 * Interface to display network param to sysfs
294 static void iscsi_iface_release(struct device *dev)
296 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
297 struct device *parent = iface->dev.parent;
304 static struct class iscsi_iface_class = {
305 .name = "iscsi_iface",
306 .dev_release = iscsi_iface_release,
309 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
310 struct device_attribute dev_attr_##_prefix##_##_name = \
311 __ATTR(_name, _mode, _show, _store)
313 /* iface attrs show */
314 #define iscsi_iface_attr_show(type, name, param_type, param) \
316 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
319 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
320 struct iscsi_transport *t = iface->transport; \
321 return t->get_iface_param(iface, param_type, param, buf); \
324 #define iscsi_iface_net_attr(type, name, param) \
325 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
326 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
328 #define iscsi_iface_attr(type, name, param) \
329 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
330 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
332 /* generic read only ipv4 attribute */
333 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
334 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
335 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
336 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
337 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
338 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
339 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
340 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
341 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
342 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
343 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
344 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
345 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
346 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
347 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
348 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
349 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
350 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
351 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
352 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
353 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
354 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
355 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
356 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
357 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
358 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
359 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
360 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
361 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
363 /* generic read only ipv6 attribute */
364 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
365 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
366 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
367 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
368 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
369 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
370 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
371 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
372 iscsi_iface_net_attr(ipv6_iface, link_local_state,
373 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
374 iscsi_iface_net_attr(ipv6_iface, router_state,
375 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
376 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
377 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
378 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
379 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
380 iscsi_iface_net_attr(ipv6_iface, traffic_class,
381 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
382 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
383 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
384 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
385 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
386 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
387 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
388 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
389 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
390 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
391 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
392 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
394 /* common read only iface attribute */
395 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
396 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
397 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
398 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
399 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
400 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
401 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
402 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
403 iscsi_iface_net_attr(iface, tcp_nagle_disable,
404 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
405 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
406 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
407 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
408 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
409 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
410 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
412 /* common iscsi specific settings attributes */
413 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
414 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
415 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
416 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
417 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
418 iscsi_iface_attr(iface, data_seq_in_order,
419 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
420 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
421 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
422 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
423 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
424 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
425 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
426 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
427 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
428 iscsi_iface_attr(iface, discovery_auth_optional,
429 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
430 iscsi_iface_attr(iface, discovery_logout,
431 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
432 iscsi_iface_attr(iface, strict_login_comp_en,
433 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
434 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
436 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
437 struct attribute *attr, int i)
439 struct device *dev = container_of(kobj, struct device, kobj);
440 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
441 struct iscsi_transport *t = iface->transport;
445 if (attr == &dev_attr_iface_enabled.attr)
446 param = ISCSI_NET_PARAM_IFACE_ENABLE;
447 else if (attr == &dev_attr_iface_vlan_id.attr)
448 param = ISCSI_NET_PARAM_VLAN_ID;
449 else if (attr == &dev_attr_iface_vlan_priority.attr)
450 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
451 else if (attr == &dev_attr_iface_vlan_enabled.attr)
452 param = ISCSI_NET_PARAM_VLAN_ENABLED;
453 else if (attr == &dev_attr_iface_mtu.attr)
454 param = ISCSI_NET_PARAM_MTU;
455 else if (attr == &dev_attr_iface_port.attr)
456 param = ISCSI_NET_PARAM_PORT;
457 else if (attr == &dev_attr_iface_ipaddress_state.attr)
458 param = ISCSI_NET_PARAM_IPADDR_STATE;
459 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
460 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
461 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
462 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
463 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
464 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
465 else if (attr == &dev_attr_iface_tcp_wsf.attr)
466 param = ISCSI_NET_PARAM_TCP_WSF;
467 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
468 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
469 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
470 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
471 else if (attr == &dev_attr_iface_cache_id.attr)
472 param = ISCSI_NET_PARAM_CACHE_ID;
473 else if (attr == &dev_attr_iface_redirect_en.attr)
474 param = ISCSI_NET_PARAM_REDIRECT_EN;
475 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
476 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
477 else if (attr == &dev_attr_iface_header_digest.attr)
478 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
479 else if (attr == &dev_attr_iface_data_digest.attr)
480 param = ISCSI_IFACE_PARAM_DATADGST_EN;
481 else if (attr == &dev_attr_iface_immediate_data.attr)
482 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
483 else if (attr == &dev_attr_iface_initial_r2t.attr)
484 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
485 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
486 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
487 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
488 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
489 else if (attr == &dev_attr_iface_erl.attr)
490 param = ISCSI_IFACE_PARAM_ERL;
491 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
492 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
493 else if (attr == &dev_attr_iface_first_burst_len.attr)
494 param = ISCSI_IFACE_PARAM_FIRST_BURST;
495 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
496 param = ISCSI_IFACE_PARAM_MAX_R2T;
497 else if (attr == &dev_attr_iface_max_burst_len.attr)
498 param = ISCSI_IFACE_PARAM_MAX_BURST;
499 else if (attr == &dev_attr_iface_chap_auth.attr)
500 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
501 else if (attr == &dev_attr_iface_bidi_chap.attr)
502 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
503 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
504 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
505 else if (attr == &dev_attr_iface_discovery_logout.attr)
506 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
507 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
508 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
509 else if (attr == &dev_attr_iface_initiator_name.attr)
510 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
511 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
512 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
513 param = ISCSI_NET_PARAM_IPV4_ADDR;
514 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
515 param = ISCSI_NET_PARAM_IPV4_GW;
516 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
517 param = ISCSI_NET_PARAM_IPV4_SUBNET;
518 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
519 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
521 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
522 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
524 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
525 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
526 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
527 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
528 else if (attr == &dev_attr_ipv4_iface_tos.attr)
529 param = ISCSI_NET_PARAM_IPV4_TOS;
530 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
531 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
533 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
534 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
535 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
536 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
538 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
539 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
541 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
542 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
543 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
544 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
546 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
547 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
549 &dev_attr_ipv4_iface_fragment_disable.attr)
550 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
552 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
553 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
554 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
555 param = ISCSI_NET_PARAM_IPV4_TTL;
558 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
559 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
560 param = ISCSI_NET_PARAM_IPV6_ADDR;
561 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
562 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
563 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
564 param = ISCSI_NET_PARAM_IPV6_ROUTER;
565 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
566 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
567 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
568 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
569 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
570 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
571 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
572 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
574 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
575 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
576 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
577 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
578 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
579 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
580 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
581 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
582 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
583 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
584 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
585 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
586 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
587 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
588 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
589 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
590 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
591 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
592 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
593 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
597 WARN_ONCE(1, "Invalid iface attr");
602 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
603 case ISCSI_IFACE_PARAM_HDRDGST_EN:
604 case ISCSI_IFACE_PARAM_DATADGST_EN:
605 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
606 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
607 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
608 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
609 case ISCSI_IFACE_PARAM_ERL:
610 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
611 case ISCSI_IFACE_PARAM_FIRST_BURST:
612 case ISCSI_IFACE_PARAM_MAX_R2T:
613 case ISCSI_IFACE_PARAM_MAX_BURST:
614 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
615 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
616 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
617 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
618 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
619 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
620 param_type = ISCSI_IFACE_PARAM;
623 param_type = ISCSI_NET_PARAM;
626 return t->attr_is_visible(param_type, param);
629 static struct attribute *iscsi_iface_attrs[] = {
630 &dev_attr_iface_enabled.attr,
631 &dev_attr_iface_vlan_id.attr,
632 &dev_attr_iface_vlan_priority.attr,
633 &dev_attr_iface_vlan_enabled.attr,
634 &dev_attr_ipv4_iface_ipaddress.attr,
635 &dev_attr_ipv4_iface_gateway.attr,
636 &dev_attr_ipv4_iface_subnet.attr,
637 &dev_attr_ipv4_iface_bootproto.attr,
638 &dev_attr_ipv6_iface_ipaddress.attr,
639 &dev_attr_ipv6_iface_link_local_addr.attr,
640 &dev_attr_ipv6_iface_router_addr.attr,
641 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
642 &dev_attr_ipv6_iface_link_local_autocfg.attr,
643 &dev_attr_iface_mtu.attr,
644 &dev_attr_iface_port.attr,
645 &dev_attr_iface_ipaddress_state.attr,
646 &dev_attr_iface_delayed_ack_en.attr,
647 &dev_attr_iface_tcp_nagle_disable.attr,
648 &dev_attr_iface_tcp_wsf_disable.attr,
649 &dev_attr_iface_tcp_wsf.attr,
650 &dev_attr_iface_tcp_timer_scale.attr,
651 &dev_attr_iface_tcp_timestamp_en.attr,
652 &dev_attr_iface_cache_id.attr,
653 &dev_attr_iface_redirect_en.attr,
654 &dev_attr_iface_def_taskmgmt_tmo.attr,
655 &dev_attr_iface_header_digest.attr,
656 &dev_attr_iface_data_digest.attr,
657 &dev_attr_iface_immediate_data.attr,
658 &dev_attr_iface_initial_r2t.attr,
659 &dev_attr_iface_data_seq_in_order.attr,
660 &dev_attr_iface_data_pdu_in_order.attr,
661 &dev_attr_iface_erl.attr,
662 &dev_attr_iface_max_recv_dlength.attr,
663 &dev_attr_iface_first_burst_len.attr,
664 &dev_attr_iface_max_outstanding_r2t.attr,
665 &dev_attr_iface_max_burst_len.attr,
666 &dev_attr_iface_chap_auth.attr,
667 &dev_attr_iface_bidi_chap.attr,
668 &dev_attr_iface_discovery_auth_optional.attr,
669 &dev_attr_iface_discovery_logout.attr,
670 &dev_attr_iface_strict_login_comp_en.attr,
671 &dev_attr_iface_initiator_name.attr,
672 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
673 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
674 &dev_attr_ipv4_iface_tos_en.attr,
675 &dev_attr_ipv4_iface_tos.attr,
676 &dev_attr_ipv4_iface_grat_arp_en.attr,
677 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
678 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
679 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
680 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
681 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
682 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
683 &dev_attr_ipv4_iface_fragment_disable.attr,
684 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
685 &dev_attr_ipv4_iface_ttl.attr,
686 &dev_attr_ipv6_iface_link_local_state.attr,
687 &dev_attr_ipv6_iface_router_state.attr,
688 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
689 &dev_attr_ipv6_iface_mld_en.attr,
690 &dev_attr_ipv6_iface_flow_label.attr,
691 &dev_attr_ipv6_iface_traffic_class.attr,
692 &dev_attr_ipv6_iface_hop_limit.attr,
693 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
694 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
695 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
696 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
697 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
701 static struct attribute_group iscsi_iface_group = {
702 .attrs = iscsi_iface_attrs,
703 .is_visible = iscsi_iface_attr_is_visible,
706 /* convert iscsi_ipaddress_state values to ascii string name */
707 static const struct {
708 enum iscsi_ipaddress_state value;
710 } iscsi_ipaddress_state_names[] = {
711 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
712 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
713 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
714 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
715 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
716 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
717 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
720 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
725 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
726 if (iscsi_ipaddress_state_names[i].value == port_state) {
727 state = iscsi_ipaddress_state_names[i].name;
733 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
735 /* convert iscsi_router_state values to ascii string name */
736 static const struct {
737 enum iscsi_router_state value;
739 } iscsi_router_state_names[] = {
740 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
741 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
742 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
743 {ISCSI_ROUTER_STATE_STALE, "Stale" },
746 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
751 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
752 if (iscsi_router_state_names[i].value == router_state) {
753 state = iscsi_router_state_names[i].name;
759 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
762 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
763 uint32_t iface_type, uint32_t iface_num, int dd_size)
765 struct iscsi_iface *iface;
768 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
772 iface->transport = transport;
773 iface->iface_type = iface_type;
774 iface->iface_num = iface_num;
775 iface->dev.release = iscsi_iface_release;
776 iface->dev.class = &iscsi_iface_class;
777 /* parent reference released in iscsi_iface_release */
778 iface->dev.parent = get_device(&shost->shost_gendev);
779 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
780 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
783 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
786 err = device_register(&iface->dev);
790 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
795 iface->dd_data = &iface[1];
799 device_unregister(&iface->dev);
803 put_device(iface->dev.parent);
807 EXPORT_SYMBOL_GPL(iscsi_create_iface);
809 void iscsi_destroy_iface(struct iscsi_iface *iface)
811 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
812 device_unregister(&iface->dev);
814 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
817 * Interface to display flash node params to sysfs
820 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
821 struct device_attribute dev_attr_##_prefix##_##_name = \
822 __ATTR(_name, _mode, _show, _store)
824 /* flash node session attrs show */
825 #define iscsi_flashnode_sess_attr_show(type, name, param) \
827 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
830 struct iscsi_bus_flash_session *fnode_sess = \
831 iscsi_dev_to_flash_session(dev);\
832 struct iscsi_transport *t = fnode_sess->transport; \
833 return t->get_flashnode_param(fnode_sess, param, buf); \
837 #define iscsi_flashnode_sess_attr(type, name, param) \
838 iscsi_flashnode_sess_attr_show(type, name, param) \
839 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
840 show_##type##_##name, NULL);
842 /* Flash node session attributes */
844 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
845 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
846 iscsi_flashnode_sess_attr(fnode, discovery_session,
847 ISCSI_FLASHNODE_DISCOVERY_SESS);
848 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
849 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
850 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
851 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
852 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
853 ISCSI_FLASHNODE_DATASEQ_INORDER);
854 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
855 ISCSI_FLASHNODE_PDU_INORDER);
856 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
857 iscsi_flashnode_sess_attr(fnode, discovery_logout,
858 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
859 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
860 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
861 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
862 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
863 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
864 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
865 iscsi_flashnode_sess_attr(fnode, def_time2retain,
866 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
867 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
868 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
869 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
870 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
871 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
872 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
873 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
874 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
875 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
876 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
877 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
878 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
879 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
880 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
881 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
882 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
883 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
884 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
885 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
886 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
888 static struct attribute *iscsi_flashnode_sess_attrs[] = {
889 &dev_attr_fnode_auto_snd_tgt_disable.attr,
890 &dev_attr_fnode_discovery_session.attr,
891 &dev_attr_fnode_portal_type.attr,
892 &dev_attr_fnode_entry_enable.attr,
893 &dev_attr_fnode_immediate_data.attr,
894 &dev_attr_fnode_initial_r2t.attr,
895 &dev_attr_fnode_data_seq_in_order.attr,
896 &dev_attr_fnode_data_pdu_in_order.attr,
897 &dev_attr_fnode_chap_auth.attr,
898 &dev_attr_fnode_discovery_logout.attr,
899 &dev_attr_fnode_bidi_chap.attr,
900 &dev_attr_fnode_discovery_auth_optional.attr,
901 &dev_attr_fnode_erl.attr,
902 &dev_attr_fnode_first_burst_len.attr,
903 &dev_attr_fnode_def_time2wait.attr,
904 &dev_attr_fnode_def_time2retain.attr,
905 &dev_attr_fnode_max_outstanding_r2t.attr,
906 &dev_attr_fnode_isid.attr,
907 &dev_attr_fnode_tsid.attr,
908 &dev_attr_fnode_max_burst_len.attr,
909 &dev_attr_fnode_def_taskmgmt_tmo.attr,
910 &dev_attr_fnode_targetalias.attr,
911 &dev_attr_fnode_targetname.attr,
912 &dev_attr_fnode_tpgt.attr,
913 &dev_attr_fnode_discovery_parent_idx.attr,
914 &dev_attr_fnode_discovery_parent_type.attr,
915 &dev_attr_fnode_chap_in_idx.attr,
916 &dev_attr_fnode_chap_out_idx.attr,
917 &dev_attr_fnode_username.attr,
918 &dev_attr_fnode_username_in.attr,
919 &dev_attr_fnode_password.attr,
920 &dev_attr_fnode_password_in.attr,
921 &dev_attr_fnode_is_boot_target.attr,
925 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
926 struct attribute *attr,
929 struct device *dev = container_of(kobj, struct device, kobj);
930 struct iscsi_bus_flash_session *fnode_sess =
931 iscsi_dev_to_flash_session(dev);
932 struct iscsi_transport *t = fnode_sess->transport;
935 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
936 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
937 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
938 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
939 } else if (attr == &dev_attr_fnode_portal_type.attr) {
940 param = ISCSI_FLASHNODE_PORTAL_TYPE;
941 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
942 param = ISCSI_FLASHNODE_ENTRY_EN;
943 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
944 param = ISCSI_FLASHNODE_IMM_DATA_EN;
945 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
946 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
947 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
948 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
949 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
950 param = ISCSI_FLASHNODE_PDU_INORDER;
951 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
952 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
953 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
954 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
955 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
956 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
957 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
958 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
959 } else if (attr == &dev_attr_fnode_erl.attr) {
960 param = ISCSI_FLASHNODE_ERL;
961 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
962 param = ISCSI_FLASHNODE_FIRST_BURST;
963 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
964 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
965 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
966 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
967 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
968 param = ISCSI_FLASHNODE_MAX_R2T;
969 } else if (attr == &dev_attr_fnode_isid.attr) {
970 param = ISCSI_FLASHNODE_ISID;
971 } else if (attr == &dev_attr_fnode_tsid.attr) {
972 param = ISCSI_FLASHNODE_TSID;
973 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
974 param = ISCSI_FLASHNODE_MAX_BURST;
975 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
976 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
977 } else if (attr == &dev_attr_fnode_targetalias.attr) {
978 param = ISCSI_FLASHNODE_ALIAS;
979 } else if (attr == &dev_attr_fnode_targetname.attr) {
980 param = ISCSI_FLASHNODE_NAME;
981 } else if (attr == &dev_attr_fnode_tpgt.attr) {
982 param = ISCSI_FLASHNODE_TPGT;
983 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
984 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
985 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
986 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
987 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
988 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
989 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
990 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
991 } else if (attr == &dev_attr_fnode_username.attr) {
992 param = ISCSI_FLASHNODE_USERNAME;
993 } else if (attr == &dev_attr_fnode_username_in.attr) {
994 param = ISCSI_FLASHNODE_USERNAME_IN;
995 } else if (attr == &dev_attr_fnode_password.attr) {
996 param = ISCSI_FLASHNODE_PASSWORD;
997 } else if (attr == &dev_attr_fnode_password_in.attr) {
998 param = ISCSI_FLASHNODE_PASSWORD_IN;
999 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
1000 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
1002 WARN_ONCE(1, "Invalid flashnode session attr");
1006 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1009 static struct attribute_group iscsi_flashnode_sess_attr_group = {
1010 .attrs = iscsi_flashnode_sess_attrs,
1011 .is_visible = iscsi_flashnode_sess_attr_is_visible,
1014 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1015 &iscsi_flashnode_sess_attr_group,
1019 static void iscsi_flashnode_sess_release(struct device *dev)
1021 struct iscsi_bus_flash_session *fnode_sess =
1022 iscsi_dev_to_flash_session(dev);
1024 kfree(fnode_sess->targetname);
1025 kfree(fnode_sess->targetalias);
1026 kfree(fnode_sess->portal_type);
1030 static const struct device_type iscsi_flashnode_sess_dev_type = {
1031 .name = "iscsi_flashnode_sess_dev_type",
1032 .groups = iscsi_flashnode_sess_attr_groups,
1033 .release = iscsi_flashnode_sess_release,
1036 /* flash node connection attrs show */
1037 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1039 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1042 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1043 struct iscsi_bus_flash_session *fnode_sess = \
1044 iscsi_flash_conn_to_flash_session(fnode_conn);\
1045 struct iscsi_transport *t = fnode_conn->transport; \
1046 return t->get_flashnode_param(fnode_sess, param, buf); \
1050 #define iscsi_flashnode_conn_attr(type, name, param) \
1051 iscsi_flashnode_conn_attr_show(type, name, param) \
1052 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1053 show_##type##_##name, NULL);
1055 /* Flash node connection attributes */
1057 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1058 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1059 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1060 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1061 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1062 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1063 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1064 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1065 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1066 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1067 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1068 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1069 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1070 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1071 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1072 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1073 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1074 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1075 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1076 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1077 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1078 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1079 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1080 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1081 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1082 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1083 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1084 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1085 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1086 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1087 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1088 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1089 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1090 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1091 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1092 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1093 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1094 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1095 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1097 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1098 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1099 &dev_attr_fnode_header_digest.attr,
1100 &dev_attr_fnode_data_digest.attr,
1101 &dev_attr_fnode_snack_req.attr,
1102 &dev_attr_fnode_tcp_timestamp_stat.attr,
1103 &dev_attr_fnode_tcp_nagle_disable.attr,
1104 &dev_attr_fnode_tcp_wsf_disable.attr,
1105 &dev_attr_fnode_tcp_timer_scale.attr,
1106 &dev_attr_fnode_tcp_timestamp_enable.attr,
1107 &dev_attr_fnode_fragment_disable.attr,
1108 &dev_attr_fnode_max_recv_dlength.attr,
1109 &dev_attr_fnode_max_xmit_dlength.attr,
1110 &dev_attr_fnode_keepalive_tmo.attr,
1111 &dev_attr_fnode_port.attr,
1112 &dev_attr_fnode_ipaddress.attr,
1113 &dev_attr_fnode_redirect_ipaddr.attr,
1114 &dev_attr_fnode_max_segment_size.attr,
1115 &dev_attr_fnode_local_port.attr,
1116 &dev_attr_fnode_ipv4_tos.attr,
1117 &dev_attr_fnode_ipv6_traffic_class.attr,
1118 &dev_attr_fnode_ipv6_flow_label.attr,
1119 &dev_attr_fnode_link_local_ipv6.attr,
1120 &dev_attr_fnode_tcp_xmit_wsf.attr,
1121 &dev_attr_fnode_tcp_recv_wsf.attr,
1122 &dev_attr_fnode_statsn.attr,
1123 &dev_attr_fnode_exp_statsn.attr,
1127 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1128 struct attribute *attr,
1131 struct device *dev = container_of(kobj, struct device, kobj);
1132 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1133 struct iscsi_transport *t = fnode_conn->transport;
1136 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1137 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1138 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1139 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1140 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1141 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1142 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1143 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1144 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1145 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1146 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1147 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1148 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1149 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1150 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1151 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1152 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1153 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1154 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1155 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1156 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1157 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1158 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1159 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1160 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1161 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1162 } else if (attr == &dev_attr_fnode_port.attr) {
1163 param = ISCSI_FLASHNODE_PORT;
1164 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1165 param = ISCSI_FLASHNODE_IPADDR;
1166 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1167 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1168 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1169 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1170 } else if (attr == &dev_attr_fnode_local_port.attr) {
1171 param = ISCSI_FLASHNODE_LOCAL_PORT;
1172 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1173 param = ISCSI_FLASHNODE_IPV4_TOS;
1174 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1175 param = ISCSI_FLASHNODE_IPV6_TC;
1176 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1177 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1178 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1179 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1180 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1181 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1182 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1183 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1184 } else if (attr == &dev_attr_fnode_statsn.attr) {
1185 param = ISCSI_FLASHNODE_STATSN;
1186 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1187 param = ISCSI_FLASHNODE_EXP_STATSN;
1189 WARN_ONCE(1, "Invalid flashnode connection attr");
1193 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1196 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1197 .attrs = iscsi_flashnode_conn_attrs,
1198 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1201 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1202 &iscsi_flashnode_conn_attr_group,
1206 static void iscsi_flashnode_conn_release(struct device *dev)
1208 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1210 kfree(fnode_conn->ipaddress);
1211 kfree(fnode_conn->redirect_ipaddr);
1212 kfree(fnode_conn->link_local_ipv6_addr);
1216 static const struct device_type iscsi_flashnode_conn_dev_type = {
1217 .name = "iscsi_flashnode_conn_dev_type",
1218 .groups = iscsi_flashnode_conn_attr_groups,
1219 .release = iscsi_flashnode_conn_release,
1222 static struct bus_type iscsi_flashnode_bus;
1224 int iscsi_flashnode_bus_match(struct device *dev,
1225 struct device_driver *drv)
1227 if (dev->bus == &iscsi_flashnode_bus)
1231 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1233 static struct bus_type iscsi_flashnode_bus = {
1234 .name = "iscsi_flashnode",
1235 .match = &iscsi_flashnode_bus_match,
1239 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1240 * @shost: pointer to host data
1241 * @index: index of flashnode to add in sysfs
1242 * @transport: pointer to transport data
1243 * @dd_size: total size to allocate
1245 * Adds a sysfs entry for the flashnode session attributes
1248 * pointer to allocated flashnode sess on success
1251 struct iscsi_bus_flash_session *
1252 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1253 struct iscsi_transport *transport,
1256 struct iscsi_bus_flash_session *fnode_sess;
1259 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1263 fnode_sess->transport = transport;
1264 fnode_sess->target_id = index;
1265 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1266 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1267 fnode_sess->dev.parent = &shost->shost_gendev;
1268 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1269 shost->host_no, index);
1271 err = device_register(&fnode_sess->dev);
1273 goto free_fnode_sess;
1276 fnode_sess->dd_data = &fnode_sess[1];
1284 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1287 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1288 * @shost: pointer to host data
1289 * @fnode_sess: pointer to the parent flashnode session entry
1290 * @transport: pointer to transport data
1291 * @dd_size: total size to allocate
1293 * Adds a sysfs entry for the flashnode connection attributes
1296 * pointer to allocated flashnode conn on success
1299 struct iscsi_bus_flash_conn *
1300 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1301 struct iscsi_bus_flash_session *fnode_sess,
1302 struct iscsi_transport *transport,
1305 struct iscsi_bus_flash_conn *fnode_conn;
1308 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1312 fnode_conn->transport = transport;
1313 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1314 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1315 fnode_conn->dev.parent = &fnode_sess->dev;
1316 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1317 shost->host_no, fnode_sess->target_id);
1319 err = device_register(&fnode_conn->dev);
1321 goto free_fnode_conn;
1324 fnode_conn->dd_data = &fnode_conn[1];
1332 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1335 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1336 * @dev: device to verify
1337 * @data: pointer to data containing value to use for verification
1339 * Verifies if the passed device is flashnode conn device
1345 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1347 return dev->bus == &iscsi_flashnode_bus;
1350 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1352 device_unregister(&fnode_conn->dev);
1356 static int flashnode_match_index(struct device *dev, void *data)
1358 struct iscsi_bus_flash_session *fnode_sess = NULL;
1361 if (!iscsi_flashnode_bus_match(dev, NULL))
1362 goto exit_match_index;
1364 fnode_sess = iscsi_dev_to_flash_session(dev);
1365 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1372 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1373 * @shost: pointer to host data
1374 * @idx: index to match
1376 * Finds the flashnode session object for the passed index
1379 * pointer to found flashnode session object on success
1382 static struct iscsi_bus_flash_session *
1383 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1385 struct iscsi_bus_flash_session *fnode_sess = NULL;
1388 dev = device_find_child(&shost->shost_gendev, &idx,
1389 flashnode_match_index);
1391 fnode_sess = iscsi_dev_to_flash_session(dev);
1397 * iscsi_find_flashnode_sess - finds flashnode session entry
1398 * @shost: pointer to host data
1399 * @data: pointer to data containing value to use for comparison
1400 * @fn: function pointer that does actual comparison
1402 * Finds the flashnode session object comparing the data passed using logic
1403 * defined in passed function pointer
1406 * pointer to found flashnode session device object on success
1410 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1411 int (*fn)(struct device *dev, void *data))
1413 return device_find_child(&shost->shost_gendev, data, fn);
1415 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1418 * iscsi_find_flashnode_conn - finds flashnode connection entry
1419 * @fnode_sess: pointer to parent flashnode session entry
1421 * Finds the flashnode connection object comparing the data passed using logic
1422 * defined in passed function pointer
1425 * pointer to found flashnode connection device object on success
1429 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1431 return device_find_child(&fnode_sess->dev, NULL,
1432 iscsi_is_flashnode_conn_dev);
1434 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1436 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1438 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1441 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1445 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1446 * @fnode_sess: pointer to flashnode session entry to be destroyed
1448 * Deletes the flashnode session entry and all children flashnode connection
1449 * entries from sysfs
1451 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1455 err = device_for_each_child(&fnode_sess->dev, NULL,
1456 iscsi_iter_destroy_flashnode_conn_fn);
1458 pr_err("Could not delete all connections for %s. Error %d.\n",
1459 fnode_sess->dev.kobj.name, err);
1461 device_unregister(&fnode_sess->dev);
1463 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1465 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1467 if (!iscsi_flashnode_bus_match(dev, NULL))
1470 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1475 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1476 * @shost: pointer to host data
1478 * Destroys all the flashnode session entries and all corresponding children
1479 * flashnode connection entries from sysfs
1481 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1483 device_for_each_child(&shost->shost_gendev, NULL,
1484 iscsi_iter_destroy_flashnode_fn);
1486 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1492 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1493 * @job: bsg job to be processed
1495 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1497 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1498 struct iscsi_bsg_request *req = job->request;
1499 struct iscsi_bsg_reply *reply = job->reply;
1500 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1501 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1504 /* check if we have the msgcode value at least */
1505 if (job->request_len < sizeof(uint32_t)) {
1510 /* Validate the host command */
1511 switch (req->msgcode) {
1512 case ISCSI_BSG_HST_VENDOR:
1513 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1514 if ((shost->hostt->vendor_id == 0L) ||
1515 (req->rqst_data.h_vendor.vendor_id !=
1516 shost->hostt->vendor_id)) {
1526 /* check if we really have all the request data needed */
1527 if (job->request_len < cmdlen) {
1532 ret = i->iscsi_transport->bsg_request(job);
1537 /* return the errno failure code as the only status */
1538 BUG_ON(job->reply_len < sizeof(uint32_t));
1539 reply->reply_payload_rcv_len = 0;
1540 reply->result = ret;
1541 job->reply_len = sizeof(uint32_t);
1542 bsg_job_done(job, ret, 0);
1547 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1548 * @shost: shost for iscsi_host
1549 * @ihost: iscsi_cls_host adding the structures to
1552 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1554 struct device *dev = &shost->shost_gendev;
1555 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1556 struct request_queue *q;
1559 if (!i->iscsi_transport->bsg_request)
1562 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1563 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1565 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1566 "initialize - no request queue\n");
1569 __scsi_init_queue(shost, q);
1575 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1576 struct device *cdev)
1578 struct Scsi_Host *shost = dev_to_shost(dev);
1579 struct iscsi_cls_host *ihost = shost->shost_data;
1581 memset(ihost, 0, sizeof(*ihost));
1582 atomic_set(&ihost->nr_scans, 0);
1583 mutex_init(&ihost->mutex);
1585 iscsi_bsg_host_add(shost, ihost);
1586 /* ignore any bsg add error - we just can't do sgio */
1591 static int iscsi_remove_host(struct transport_container *tc,
1592 struct device *dev, struct device *cdev)
1594 struct Scsi_Host *shost = dev_to_shost(dev);
1595 struct iscsi_cls_host *ihost = shost->shost_data;
1597 bsg_remove_queue(ihost->bsg_q);
1601 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1607 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1613 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1619 static struct sock *nls;
1620 static DEFINE_MUTEX(rx_queue_mutex);
1622 static LIST_HEAD(sesslist);
1623 static DEFINE_SPINLOCK(sesslock);
1624 static LIST_HEAD(connlist);
1625 static LIST_HEAD(connlist_err);
1626 static DEFINE_SPINLOCK(connlock);
1628 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1630 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1635 * Returns the matching session to a given sid
1637 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1639 unsigned long flags;
1640 struct iscsi_cls_session *sess;
1642 spin_lock_irqsave(&sesslock, flags);
1643 list_for_each_entry(sess, &sesslist, sess_list) {
1644 if (sess->sid == sid) {
1645 spin_unlock_irqrestore(&sesslock, flags);
1649 spin_unlock_irqrestore(&sesslock, flags);
1654 * Returns the matching connection to a given sid / cid tuple
1656 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1658 unsigned long flags;
1659 struct iscsi_cls_conn *conn;
1661 spin_lock_irqsave(&connlock, flags);
1662 list_for_each_entry(conn, &connlist, conn_list) {
1663 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1664 spin_unlock_irqrestore(&connlock, flags);
1668 spin_unlock_irqrestore(&connlock, flags);
1673 * The following functions can be used by LLDs that allocate
1674 * their own scsi_hosts or by software iscsi LLDs
1679 } iscsi_session_state_names[] = {
1680 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1681 { ISCSI_SESSION_FAILED, "FAILED" },
1682 { ISCSI_SESSION_FREE, "FREE" },
1685 static const char *iscsi_session_state_name(int state)
1690 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1691 if (iscsi_session_state_names[i].value == state) {
1692 name = iscsi_session_state_names[i].name;
1699 int iscsi_session_chkready(struct iscsi_cls_session *session)
1703 switch (session->state) {
1704 case ISCSI_SESSION_LOGGED_IN:
1707 case ISCSI_SESSION_FAILED:
1708 err = DID_IMM_RETRY << 16;
1710 case ISCSI_SESSION_FREE:
1711 err = DID_TRANSPORT_FAILFAST << 16;
1714 err = DID_NO_CONNECT << 16;
1719 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1721 int iscsi_is_session_online(struct iscsi_cls_session *session)
1723 unsigned long flags;
1726 spin_lock_irqsave(&session->lock, flags);
1727 if (session->state == ISCSI_SESSION_LOGGED_IN)
1729 spin_unlock_irqrestore(&session->lock, flags);
1732 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1734 static void iscsi_session_release(struct device *dev)
1736 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1737 struct Scsi_Host *shost;
1739 shost = iscsi_session_to_shost(session);
1740 scsi_host_put(shost);
1741 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1745 int iscsi_is_session_dev(const struct device *dev)
1747 return dev->release == iscsi_session_release;
1749 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1751 static int iscsi_iter_session_fn(struct device *dev, void *data)
1753 void (* fn) (struct iscsi_cls_session *) = data;
1755 if (!iscsi_is_session_dev(dev))
1757 fn(iscsi_dev_to_session(dev));
1761 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1762 void (*fn)(struct iscsi_cls_session *))
1764 device_for_each_child(&shost->shost_gendev, fn,
1765 iscsi_iter_session_fn);
1767 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1770 * iscsi_scan_finished - helper to report when running scans are done
1772 * @time: scan run time
1774 * This function can be used by drives like qla4xxx to report to the scsi
1775 * layer when the scans it kicked off at module load time are done.
1777 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1779 struct iscsi_cls_host *ihost = shost->shost_data;
1781 * qla4xxx will have kicked off some session unblocks before calling
1782 * scsi_scan_host, so just wait for them to complete.
1784 return !atomic_read(&ihost->nr_scans);
1786 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1788 struct iscsi_scan_data {
1789 unsigned int channel;
1792 enum scsi_scan_mode rescan;
1795 static int iscsi_user_scan_session(struct device *dev, void *data)
1797 struct iscsi_scan_data *scan_data = data;
1798 struct iscsi_cls_session *session;
1799 struct Scsi_Host *shost;
1800 struct iscsi_cls_host *ihost;
1801 unsigned long flags;
1804 if (!iscsi_is_session_dev(dev))
1807 session = iscsi_dev_to_session(dev);
1809 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1811 shost = iscsi_session_to_shost(session);
1812 ihost = shost->shost_data;
1814 mutex_lock(&ihost->mutex);
1815 spin_lock_irqsave(&session->lock, flags);
1816 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1817 spin_unlock_irqrestore(&session->lock, flags);
1818 goto user_scan_exit;
1820 id = session->target_id;
1821 spin_unlock_irqrestore(&session->lock, flags);
1823 if (id != ISCSI_MAX_TARGET) {
1824 if ((scan_data->channel == SCAN_WILD_CARD ||
1825 scan_data->channel == 0) &&
1826 (scan_data->id == SCAN_WILD_CARD ||
1827 scan_data->id == id))
1828 scsi_scan_target(&session->dev, 0, id,
1829 scan_data->lun, scan_data->rescan);
1833 mutex_unlock(&ihost->mutex);
1834 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1838 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1841 struct iscsi_scan_data scan_data;
1843 scan_data.channel = channel;
1845 scan_data.lun = lun;
1846 scan_data.rescan = SCSI_SCAN_MANUAL;
1848 return device_for_each_child(&shost->shost_gendev, &scan_data,
1849 iscsi_user_scan_session);
1852 static void iscsi_scan_session(struct work_struct *work)
1854 struct iscsi_cls_session *session =
1855 container_of(work, struct iscsi_cls_session, scan_work);
1856 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1857 struct iscsi_cls_host *ihost = shost->shost_data;
1858 struct iscsi_scan_data scan_data;
1860 scan_data.channel = 0;
1861 scan_data.id = SCAN_WILD_CARD;
1862 scan_data.lun = SCAN_WILD_CARD;
1863 scan_data.rescan = SCSI_SCAN_RESCAN;
1865 iscsi_user_scan_session(&session->dev, &scan_data);
1866 atomic_dec(&ihost->nr_scans);
1870 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1871 * @cmd: scsi cmd passed to scsi eh handler
1873 * If the session is down this function will wait for the recovery
1874 * timer to fire or for the session to be logged back in. If the
1875 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1876 * should pass this error value to the scsi eh.
1878 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1880 struct iscsi_cls_session *session =
1881 starget_to_session(scsi_target(cmd->device));
1882 unsigned long flags;
1885 spin_lock_irqsave(&session->lock, flags);
1886 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1887 if (session->state == ISCSI_SESSION_FREE) {
1891 spin_unlock_irqrestore(&session->lock, flags);
1893 spin_lock_irqsave(&session->lock, flags);
1895 spin_unlock_irqrestore(&session->lock, flags);
1898 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1900 static void session_recovery_timedout(struct work_struct *work)
1902 struct iscsi_cls_session *session =
1903 container_of(work, struct iscsi_cls_session,
1904 recovery_work.work);
1905 unsigned long flags;
1907 iscsi_cls_session_printk(KERN_INFO, session,
1908 "session recovery timed out after %d secs\n",
1909 session->recovery_tmo);
1911 spin_lock_irqsave(&session->lock, flags);
1912 switch (session->state) {
1913 case ISCSI_SESSION_FAILED:
1914 session->state = ISCSI_SESSION_FREE;
1916 case ISCSI_SESSION_LOGGED_IN:
1917 case ISCSI_SESSION_FREE:
1918 /* we raced with the unblock's flush */
1919 spin_unlock_irqrestore(&session->lock, flags);
1922 spin_unlock_irqrestore(&session->lock, flags);
1924 if (session->transport->session_recovery_timedout)
1925 session->transport->session_recovery_timedout(session);
1927 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1928 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1929 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1932 static void __iscsi_unblock_session(struct work_struct *work)
1934 struct iscsi_cls_session *session =
1935 container_of(work, struct iscsi_cls_session,
1937 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1938 struct iscsi_cls_host *ihost = shost->shost_data;
1939 unsigned long flags;
1941 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1943 * The recovery and unblock work get run from the same workqueue,
1944 * so try to cancel it if it was going to run after this unblock.
1946 cancel_delayed_work(&session->recovery_work);
1947 spin_lock_irqsave(&session->lock, flags);
1948 session->state = ISCSI_SESSION_LOGGED_IN;
1949 spin_unlock_irqrestore(&session->lock, flags);
1951 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1953 * Only do kernel scanning if the driver is properly hooked into
1954 * the async scanning code (drivers like iscsi_tcp do login and
1955 * scanning from userspace).
1957 if (shost->hostt->scan_finished) {
1958 if (scsi_queue_work(shost, &session->scan_work))
1959 atomic_inc(&ihost->nr_scans);
1961 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1965 * iscsi_unblock_session - set a session as logged in and start IO.
1966 * @session: iscsi session
1968 * Mark a session as ready to accept IO.
1970 void iscsi_unblock_session(struct iscsi_cls_session *session)
1972 flush_work(&session->block_work);
1974 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1976 * Blocking the session can be done from any context so we only
1977 * queue the block work. Make sure the unblock work has completed
1978 * because it flushes/cancels the other works and updates the state.
1980 flush_work(&session->unblock_work);
1982 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1984 static void __iscsi_block_session(struct work_struct *work)
1986 struct iscsi_cls_session *session =
1987 container_of(work, struct iscsi_cls_session,
1989 unsigned long flags;
1991 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1992 spin_lock_irqsave(&session->lock, flags);
1993 session->state = ISCSI_SESSION_FAILED;
1994 spin_unlock_irqrestore(&session->lock, flags);
1995 scsi_target_block(&session->dev);
1996 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1997 if (session->recovery_tmo >= 0)
1998 queue_delayed_work(iscsi_eh_timer_workq,
1999 &session->recovery_work,
2000 session->recovery_tmo * HZ);
2003 void iscsi_block_session(struct iscsi_cls_session *session)
2005 queue_work(iscsi_eh_timer_workq, &session->block_work);
2007 EXPORT_SYMBOL_GPL(iscsi_block_session);
2009 static void __iscsi_unbind_session(struct work_struct *work)
2011 struct iscsi_cls_session *session =
2012 container_of(work, struct iscsi_cls_session,
2014 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2015 struct iscsi_cls_host *ihost = shost->shost_data;
2016 unsigned long flags;
2017 unsigned int target_id;
2019 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2021 /* Prevent new scans and make sure scanning is not in progress */
2022 mutex_lock(&ihost->mutex);
2023 spin_lock_irqsave(&session->lock, flags);
2024 if (session->target_id == ISCSI_MAX_TARGET) {
2025 spin_unlock_irqrestore(&session->lock, flags);
2026 mutex_unlock(&ihost->mutex);
2027 goto unbind_session_exit;
2030 target_id = session->target_id;
2031 session->target_id = ISCSI_MAX_TARGET;
2032 spin_unlock_irqrestore(&session->lock, flags);
2033 mutex_unlock(&ihost->mutex);
2035 scsi_remove_target(&session->dev);
2037 if (session->ida_used)
2038 ida_simple_remove(&iscsi_sess_ida, target_id);
2040 unbind_session_exit:
2041 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2042 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2045 static void __iscsi_destroy_session(struct work_struct *work)
2047 struct iscsi_cls_session *session =
2048 container_of(work, struct iscsi_cls_session, destroy_work);
2050 session->transport->destroy_session(session);
2053 struct iscsi_cls_session *
2054 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2057 struct iscsi_cls_session *session;
2059 session = kzalloc(sizeof(*session) + dd_size,
2064 session->transport = transport;
2065 session->creator = -1;
2066 session->recovery_tmo = 120;
2067 session->recovery_tmo_sysfs_override = false;
2068 session->state = ISCSI_SESSION_FREE;
2069 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2070 INIT_LIST_HEAD(&session->sess_list);
2071 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2072 INIT_WORK(&session->block_work, __iscsi_block_session);
2073 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2074 INIT_WORK(&session->scan_work, iscsi_scan_session);
2075 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2076 spin_lock_init(&session->lock);
2078 /* this is released in the dev's release function */
2079 scsi_host_get(shost);
2080 session->dev.parent = &shost->shost_gendev;
2081 session->dev.release = iscsi_session_release;
2082 device_initialize(&session->dev);
2084 session->dd_data = &session[1];
2086 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2089 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2091 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2093 unsigned long flags;
2097 session->sid = atomic_add_return(1, &iscsi_session_nr);
2099 if (target_id == ISCSI_MAX_TARGET) {
2100 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2103 iscsi_cls_session_printk(KERN_ERR, session,
2104 "Failure in Target ID Allocation\n");
2107 session->target_id = (unsigned int)id;
2108 session->ida_used = true;
2110 session->target_id = target_id;
2112 dev_set_name(&session->dev, "session%u", session->sid);
2113 err = device_add(&session->dev);
2115 iscsi_cls_session_printk(KERN_ERR, session,
2116 "could not register session's dev\n");
2119 err = transport_register_device(&session->dev);
2121 iscsi_cls_session_printk(KERN_ERR, session,
2122 "could not register transport's dev\n");
2126 spin_lock_irqsave(&sesslock, flags);
2127 list_add(&session->sess_list, &sesslist);
2128 spin_unlock_irqrestore(&sesslock, flags);
2130 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2131 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2135 device_del(&session->dev);
2137 if (session->ida_used)
2138 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2142 EXPORT_SYMBOL_GPL(iscsi_add_session);
2145 * iscsi_create_session - create iscsi class session
2147 * @transport: iscsi transport
2148 * @dd_size: private driver data size
2149 * @target_id: which target
2151 * This can be called from a LLD or iscsi_transport.
2153 struct iscsi_cls_session *
2154 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2155 int dd_size, unsigned int target_id)
2157 struct iscsi_cls_session *session;
2159 session = iscsi_alloc_session(shost, transport, dd_size);
2163 if (iscsi_add_session(session, target_id)) {
2164 iscsi_free_session(session);
2169 EXPORT_SYMBOL_GPL(iscsi_create_session);
2171 static void iscsi_conn_release(struct device *dev)
2173 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2174 struct device *parent = conn->dev.parent;
2176 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2181 static int iscsi_is_conn_dev(const struct device *dev)
2183 return dev->release == iscsi_conn_release;
2186 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2188 if (!iscsi_is_conn_dev(dev))
2190 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2193 void iscsi_remove_session(struct iscsi_cls_session *session)
2195 unsigned long flags;
2198 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2200 spin_lock_irqsave(&sesslock, flags);
2201 if (!list_empty(&session->sess_list))
2202 list_del(&session->sess_list);
2203 spin_unlock_irqrestore(&sesslock, flags);
2205 flush_work(&session->block_work);
2206 flush_work(&session->unblock_work);
2207 cancel_delayed_work_sync(&session->recovery_work);
2209 * If we are blocked let commands flow again. The lld or iscsi
2210 * layer should set up the queuecommand to fail commands.
2211 * We assume that LLD will not be calling block/unblock while
2212 * removing the session.
2214 spin_lock_irqsave(&session->lock, flags);
2215 session->state = ISCSI_SESSION_FREE;
2216 spin_unlock_irqrestore(&session->lock, flags);
2218 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2219 /* flush running scans then delete devices */
2220 flush_work(&session->scan_work);
2221 /* flush running unbind operations */
2222 flush_work(&session->unbind_work);
2223 __iscsi_unbind_session(&session->unbind_work);
2225 /* hw iscsi may not have removed all connections from session */
2226 err = device_for_each_child(&session->dev, NULL,
2227 iscsi_iter_destroy_conn_fn);
2229 iscsi_cls_session_printk(KERN_ERR, session,
2230 "Could not delete all connections "
2231 "for session. Error %d.\n", err);
2233 transport_unregister_device(&session->dev);
2235 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2236 device_del(&session->dev);
2238 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2240 static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag)
2242 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n");
2245 case STOP_CONN_RECOVER:
2246 conn->state = ISCSI_CONN_FAILED;
2248 case STOP_CONN_TERM:
2249 conn->state = ISCSI_CONN_DOWN;
2252 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n",
2257 conn->transport->stop_conn(conn, flag);
2258 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n");
2261 static int iscsi_if_stop_conn(struct iscsi_transport *transport,
2262 struct iscsi_uevent *ev)
2264 int flag = ev->u.stop_conn.flag;
2265 struct iscsi_cls_conn *conn;
2267 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
2271 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n");
2273 * If this is a termination we have to call stop_conn with that flag
2274 * so the correct states get set. If we haven't run the work yet try to
2275 * avoid the extra run.
2277 if (flag == STOP_CONN_TERM) {
2278 cancel_work_sync(&conn->cleanup_work);
2279 iscsi_stop_conn(conn, flag);
2282 * Figure out if it was the kernel or userspace initiating this.
2284 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
2285 iscsi_stop_conn(conn, flag);
2287 ISCSI_DBG_TRANS_CONN(conn,
2288 "flush kernel conn cleanup.\n");
2289 flush_work(&conn->cleanup_work);
2292 * Only clear for recovery to avoid extra cleanup runs during
2295 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags);
2297 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n");
2301 static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active)
2303 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2304 struct iscsi_endpoint *ep;
2306 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n");
2307 conn->state = ISCSI_CONN_FAILED;
2309 if (!conn->ep || !session->transport->ep_disconnect)
2315 session->transport->unbind_conn(conn, is_active);
2316 session->transport->ep_disconnect(ep);
2317 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n");
2320 static void iscsi_cleanup_conn_work_fn(struct work_struct *work)
2322 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn,
2324 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2326 mutex_lock(&conn->ep_mutex);
2328 * If we are not at least bound there is nothing for us to do. Userspace
2329 * will do a ep_disconnect call if offload is used, but will not be
2330 * doing a stop since there is nothing to clean up, so we have to clear
2331 * the cleanup bit here.
2333 if (conn->state != ISCSI_CONN_BOUND && conn->state != ISCSI_CONN_UP) {
2334 ISCSI_DBG_TRANS_CONN(conn, "Got error while conn is already failed. Ignoring.\n");
2335 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags);
2336 mutex_unlock(&conn->ep_mutex);
2340 iscsi_ep_disconnect(conn, false);
2342 if (system_state != SYSTEM_RUNNING) {
2344 * If the user has set up for the session to never timeout
2345 * then hang like they wanted. For all other cases fail right
2346 * away since userspace is not going to relogin.
2348 if (session->recovery_tmo > 0)
2349 session->recovery_tmo = 0;
2352 iscsi_stop_conn(conn, STOP_CONN_RECOVER);
2353 mutex_unlock(&conn->ep_mutex);
2354 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n");
2357 void iscsi_free_session(struct iscsi_cls_session *session)
2359 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2360 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2361 put_device(&session->dev);
2363 EXPORT_SYMBOL_GPL(iscsi_free_session);
2366 * iscsi_create_conn - create iscsi class connection
2367 * @session: iscsi cls session
2368 * @dd_size: private driver data size
2369 * @cid: connection id
2371 * This can be called from a LLD or iscsi_transport. The connection
2372 * is child of the session so cid must be unique for all connections
2375 * Since we do not support MCS, cid will normally be zero. In some cases
2376 * for software iscsi we could be trying to preallocate a connection struct
2377 * in which case there could be two connection structs and cid would be
2380 struct iscsi_cls_conn *
2381 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2383 struct iscsi_transport *transport = session->transport;
2384 struct iscsi_cls_conn *conn;
2385 unsigned long flags;
2388 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2392 conn->dd_data = &conn[1];
2394 mutex_init(&conn->ep_mutex);
2395 INIT_LIST_HEAD(&conn->conn_list);
2396 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn);
2397 conn->transport = transport;
2399 conn->state = ISCSI_CONN_DOWN;
2401 /* this is released in the dev's release function */
2402 if (!get_device(&session->dev))
2405 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2406 conn->dev.parent = &session->dev;
2407 conn->dev.release = iscsi_conn_release;
2408 err = device_register(&conn->dev);
2410 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2411 "register connection's dev\n");
2412 goto release_parent_ref;
2414 err = transport_register_device(&conn->dev);
2416 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2417 "register transport's dev\n");
2418 goto release_conn_ref;
2421 spin_lock_irqsave(&connlock, flags);
2422 list_add(&conn->conn_list, &connlist);
2423 spin_unlock_irqrestore(&connlock, flags);
2425 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2429 device_unregister(&conn->dev);
2430 put_device(&session->dev);
2433 put_device(&session->dev);
2439 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2442 * iscsi_destroy_conn - destroy iscsi class connection
2443 * @conn: iscsi cls session
2445 * This can be called from a LLD or iscsi_transport.
2447 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2449 unsigned long flags;
2451 spin_lock_irqsave(&connlock, flags);
2452 list_del(&conn->conn_list);
2453 spin_unlock_irqrestore(&connlock, flags);
2455 transport_unregister_device(&conn->dev);
2456 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2457 device_unregister(&conn->dev);
2460 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2462 void iscsi_put_conn(struct iscsi_cls_conn *conn)
2464 put_device(&conn->dev);
2466 EXPORT_SYMBOL_GPL(iscsi_put_conn);
2468 void iscsi_get_conn(struct iscsi_cls_conn *conn)
2470 get_device(&conn->dev);
2472 EXPORT_SYMBOL_GPL(iscsi_get_conn);
2475 * iscsi interface functions
2477 static struct iscsi_internal *
2478 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2480 struct iscsi_internal *priv;
2481 unsigned long flags;
2483 spin_lock_irqsave(&iscsi_transport_lock, flags);
2484 list_for_each_entry(priv, &iscsi_transports, list) {
2485 if (tt == priv->iscsi_transport) {
2486 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2490 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2495 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2497 return nlmsg_multicast(nls, skb, 0, group, gfp);
2501 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2503 return nlmsg_unicast(nls, skb, portid);
2506 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2507 char *data, uint32_t data_size)
2509 struct nlmsghdr *nlh;
2510 struct sk_buff *skb;
2511 struct iscsi_uevent *ev;
2513 struct iscsi_internal *priv;
2514 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2517 priv = iscsi_if_transport_lookup(conn->transport);
2521 skb = alloc_skb(len, GFP_ATOMIC);
2523 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2524 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2525 "control PDU: OOM\n");
2529 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2530 ev = nlmsg_data(nlh);
2531 memset(ev, 0, sizeof(*ev));
2532 ev->transport_handle = iscsi_handle(conn->transport);
2533 ev->type = ISCSI_KEVENT_RECV_PDU;
2534 ev->r.recv_req.cid = conn->cid;
2535 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2536 pdu = (char*)ev + sizeof(*ev);
2537 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2538 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2540 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2542 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2544 int iscsi_offload_mesg(struct Scsi_Host *shost,
2545 struct iscsi_transport *transport, uint32_t type,
2546 char *data, uint16_t data_size)
2548 struct nlmsghdr *nlh;
2549 struct sk_buff *skb;
2550 struct iscsi_uevent *ev;
2551 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2553 skb = alloc_skb(len, GFP_ATOMIC);
2555 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2559 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2560 ev = nlmsg_data(nlh);
2561 memset(ev, 0, sizeof(*ev));
2563 ev->transport_handle = iscsi_handle(transport);
2565 case ISCSI_KEVENT_PATH_REQ:
2566 ev->r.req_path.host_no = shost->host_no;
2568 case ISCSI_KEVENT_IF_DOWN:
2569 ev->r.notify_if_down.host_no = shost->host_no;
2573 memcpy((char *)ev + sizeof(*ev), data, data_size);
2575 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2577 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2579 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2581 struct nlmsghdr *nlh;
2582 struct sk_buff *skb;
2583 struct iscsi_uevent *ev;
2584 struct iscsi_internal *priv;
2585 int len = nlmsg_total_size(sizeof(*ev));
2587 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags))
2588 queue_work(iscsi_conn_cleanup_workq, &conn->cleanup_work);
2590 priv = iscsi_if_transport_lookup(conn->transport);
2594 skb = alloc_skb(len, GFP_ATOMIC);
2596 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2597 "conn error (%d)\n", error);
2601 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2602 ev = nlmsg_data(nlh);
2603 ev->transport_handle = iscsi_handle(conn->transport);
2604 ev->type = ISCSI_KEVENT_CONN_ERROR;
2605 ev->r.connerror.error = error;
2606 ev->r.connerror.cid = conn->cid;
2607 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2609 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2611 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2614 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2616 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2617 enum iscsi_conn_state state)
2619 struct nlmsghdr *nlh;
2620 struct sk_buff *skb;
2621 struct iscsi_uevent *ev;
2622 struct iscsi_internal *priv;
2623 int len = nlmsg_total_size(sizeof(*ev));
2625 priv = iscsi_if_transport_lookup(conn->transport);
2629 skb = alloc_skb(len, GFP_ATOMIC);
2631 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2632 "conn login (%d)\n", state);
2636 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2637 ev = nlmsg_data(nlh);
2638 ev->transport_handle = iscsi_handle(conn->transport);
2639 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2640 ev->r.conn_login.state = state;
2641 ev->r.conn_login.cid = conn->cid;
2642 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2643 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2645 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2648 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2650 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2651 enum iscsi_host_event_code code, uint32_t data_size,
2654 struct nlmsghdr *nlh;
2655 struct sk_buff *skb;
2656 struct iscsi_uevent *ev;
2657 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2659 skb = alloc_skb(len, GFP_NOIO);
2661 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2666 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2667 ev = nlmsg_data(nlh);
2668 ev->transport_handle = iscsi_handle(transport);
2669 ev->type = ISCSI_KEVENT_HOST_EVENT;
2670 ev->r.host_event.host_no = host_no;
2671 ev->r.host_event.code = code;
2672 ev->r.host_event.data_size = data_size;
2675 memcpy((char *)ev + sizeof(*ev), data, data_size);
2677 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2679 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2681 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2682 uint32_t status, uint32_t pid, uint32_t data_size,
2685 struct nlmsghdr *nlh;
2686 struct sk_buff *skb;
2687 struct iscsi_uevent *ev;
2688 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2690 skb = alloc_skb(len, GFP_NOIO);
2692 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2696 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2697 ev = nlmsg_data(nlh);
2698 ev->transport_handle = iscsi_handle(transport);
2699 ev->type = ISCSI_KEVENT_PING_COMP;
2700 ev->r.ping_comp.host_no = host_no;
2701 ev->r.ping_comp.status = status;
2702 ev->r.ping_comp.pid = pid;
2703 ev->r.ping_comp.data_size = data_size;
2704 memcpy((char *)ev + sizeof(*ev), data, data_size);
2706 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2708 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2711 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2713 struct sk_buff *skb;
2714 struct nlmsghdr *nlh;
2715 int len = nlmsg_total_size(size);
2717 skb = alloc_skb(len, GFP_ATOMIC);
2719 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2723 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2724 memcpy(nlmsg_data(nlh), payload, size);
2725 return iscsi_unicast_skb(skb, portid);
2729 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2731 struct iscsi_uevent *ev = nlmsg_data(nlh);
2732 struct iscsi_stats *stats;
2733 struct sk_buff *skbstat;
2734 struct iscsi_cls_conn *conn;
2735 struct nlmsghdr *nlhstat;
2736 struct iscsi_uevent *evstat;
2737 struct iscsi_internal *priv;
2738 int len = nlmsg_total_size(sizeof(*ev) +
2739 sizeof(struct iscsi_stats) +
2740 sizeof(struct iscsi_stats_custom) *
2741 ISCSI_STATS_CUSTOM_MAX);
2744 priv = iscsi_if_transport_lookup(transport);
2748 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2755 skbstat = alloc_skb(len, GFP_ATOMIC);
2757 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2758 "deliver stats: OOM\n");
2762 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2763 (len - sizeof(*nlhstat)), 0);
2764 evstat = nlmsg_data(nlhstat);
2765 memset(evstat, 0, sizeof(*evstat));
2766 evstat->transport_handle = iscsi_handle(conn->transport);
2767 evstat->type = nlh->nlmsg_type;
2768 evstat->u.get_stats.cid =
2769 ev->u.get_stats.cid;
2770 evstat->u.get_stats.sid =
2771 ev->u.get_stats.sid;
2772 stats = (struct iscsi_stats *)
2773 ((char*)evstat + sizeof(*evstat));
2774 memset(stats, 0, sizeof(*stats));
2776 transport->get_stats(conn, stats);
2777 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2778 sizeof(struct iscsi_stats) +
2779 sizeof(struct iscsi_stats_custom) *
2780 stats->custom_length);
2781 actual_size -= sizeof(*nlhstat);
2782 actual_size = nlmsg_msg_size(actual_size);
2783 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2784 nlhstat->nlmsg_len = actual_size;
2786 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2788 } while (err < 0 && err != -ECONNREFUSED);
2794 * iscsi_session_event - send session destr. completion event
2795 * @session: iscsi class session
2796 * @event: type of event
2798 int iscsi_session_event(struct iscsi_cls_session *session,
2799 enum iscsi_uevent_e event)
2801 struct iscsi_internal *priv;
2802 struct Scsi_Host *shost;
2803 struct iscsi_uevent *ev;
2804 struct sk_buff *skb;
2805 struct nlmsghdr *nlh;
2806 int rc, len = nlmsg_total_size(sizeof(*ev));
2808 priv = iscsi_if_transport_lookup(session->transport);
2811 shost = iscsi_session_to_shost(session);
2813 skb = alloc_skb(len, GFP_KERNEL);
2815 iscsi_cls_session_printk(KERN_ERR, session,
2816 "Cannot notify userspace of session "
2817 "event %u\n", event);
2821 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2822 ev = nlmsg_data(nlh);
2823 ev->transport_handle = iscsi_handle(session->transport);
2827 case ISCSI_KEVENT_DESTROY_SESSION:
2828 ev->r.d_session.host_no = shost->host_no;
2829 ev->r.d_session.sid = session->sid;
2831 case ISCSI_KEVENT_CREATE_SESSION:
2832 ev->r.c_session_ret.host_no = shost->host_no;
2833 ev->r.c_session_ret.sid = session->sid;
2835 case ISCSI_KEVENT_UNBIND_SESSION:
2836 ev->r.unbind_session.host_no = shost->host_no;
2837 ev->r.unbind_session.sid = session->sid;
2840 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2847 * this will occur if the daemon is not up, so we just warn
2848 * the user and when the daemon is restarted it will handle it
2850 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2852 iscsi_cls_session_printk(KERN_ERR, session,
2853 "Cannot notify userspace of session "
2854 "event %u. Check iscsi daemon\n",
2857 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2861 EXPORT_SYMBOL_GPL(iscsi_session_event);
2864 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2865 struct iscsi_uevent *ev, pid_t pid,
2866 uint32_t initial_cmdsn, uint16_t cmds_max,
2867 uint16_t queue_depth)
2869 struct iscsi_transport *transport = priv->iscsi_transport;
2870 struct iscsi_cls_session *session;
2871 struct Scsi_Host *shost;
2873 session = transport->create_session(ep, cmds_max, queue_depth,
2878 session->creator = pid;
2879 shost = iscsi_session_to_shost(session);
2880 ev->r.c_session_ret.host_no = shost->host_no;
2881 ev->r.c_session_ret.sid = session->sid;
2882 ISCSI_DBG_TRANS_SESSION(session,
2883 "Completed creating transport session\n");
2888 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2890 struct iscsi_cls_conn *conn;
2891 struct iscsi_cls_session *session;
2893 session = iscsi_session_lookup(ev->u.c_conn.sid);
2895 printk(KERN_ERR "iscsi: invalid session %d.\n",
2900 conn = transport->create_conn(session, ev->u.c_conn.cid);
2902 iscsi_cls_session_printk(KERN_ERR, session,
2903 "couldn't create a new connection.");
2907 ev->r.c_conn_ret.sid = session->sid;
2908 ev->r.c_conn_ret.cid = conn->cid;
2910 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2915 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2917 struct iscsi_cls_conn *conn;
2919 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2923 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n");
2924 flush_work(&conn->cleanup_work);
2925 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2927 if (transport->destroy_conn)
2928 transport->destroy_conn(conn);
2933 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2935 char *data = (char*)ev + sizeof(*ev);
2936 struct iscsi_cls_conn *conn;
2937 struct iscsi_cls_session *session;
2938 int err = 0, value = 0;
2940 if (ev->u.set_param.len > PAGE_SIZE)
2943 session = iscsi_session_lookup(ev->u.set_param.sid);
2944 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2945 if (!conn || !session)
2948 switch (ev->u.set_param.param) {
2949 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2950 sscanf(data, "%d", &value);
2951 if (!session->recovery_tmo_sysfs_override)
2952 session->recovery_tmo = value;
2955 err = transport->set_param(conn, ev->u.set_param.param,
2956 data, ev->u.set_param.len);
2957 if ((conn->state == ISCSI_CONN_BOUND) ||
2958 (conn->state == ISCSI_CONN_UP)) {
2959 err = transport->set_param(conn, ev->u.set_param.param,
2960 data, ev->u.set_param.len);
2969 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2970 struct iscsi_uevent *ev, int msg_type)
2972 struct iscsi_endpoint *ep;
2973 struct sockaddr *dst_addr;
2974 struct Scsi_Host *shost = NULL;
2975 int non_blocking, err = 0;
2977 if (!transport->ep_connect)
2980 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2981 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2983 printk(KERN_ERR "ep connect failed. Could not find "
2985 ev->u.ep_connect_through_host.host_no);
2988 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2990 non_blocking = ev->u.ep_connect.non_blocking;
2992 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2993 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2999 ev->r.ep_connect_ret.handle = ep->id;
3002 scsi_host_put(shost);
3006 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
3009 struct iscsi_cls_conn *conn;
3010 struct iscsi_endpoint *ep;
3012 if (!transport->ep_disconnect)
3015 ep = iscsi_lookup_endpoint(ep_handle);
3022 * conn was not even bound yet, so we can't get iscsi conn
3025 transport->ep_disconnect(ep);
3029 mutex_lock(&conn->ep_mutex);
3030 /* Check if this was a conn error and the kernel took ownership */
3031 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
3032 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n");
3033 mutex_unlock(&conn->ep_mutex);
3035 flush_work(&conn->cleanup_work);
3039 iscsi_ep_disconnect(conn, false);
3040 mutex_unlock(&conn->ep_mutex);
3042 iscsi_put_endpoint(ep);
3047 iscsi_if_transport_ep(struct iscsi_transport *transport,
3048 struct iscsi_uevent *ev, int msg_type)
3050 struct iscsi_endpoint *ep;
3054 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3055 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3056 rc = iscsi_if_ep_connect(transport, ev, msg_type);
3058 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3059 if (!transport->ep_poll)
3062 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
3066 ev->r.retcode = transport->ep_poll(ep,
3067 ev->u.ep_poll.timeout_ms);
3068 iscsi_put_endpoint(ep);
3070 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3071 rc = iscsi_if_ep_disconnect(transport,
3072 ev->u.ep_disconnect.ep_handle);
3079 iscsi_tgt_dscvr(struct iscsi_transport *transport,
3080 struct iscsi_uevent *ev)
3082 struct Scsi_Host *shost;
3083 struct sockaddr *dst_addr;
3086 if (!transport->tgt_dscvr)
3089 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3091 printk(KERN_ERR "target discovery could not find host no %u\n",
3092 ev->u.tgt_dscvr.host_no);
3097 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3098 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3099 ev->u.tgt_dscvr.enable, dst_addr);
3100 scsi_host_put(shost);
3105 iscsi_set_host_param(struct iscsi_transport *transport,
3106 struct iscsi_uevent *ev)
3108 char *data = (char*)ev + sizeof(*ev);
3109 struct Scsi_Host *shost;
3112 if (!transport->set_host_param)
3115 if (ev->u.set_host_param.len > PAGE_SIZE)
3118 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3120 printk(KERN_ERR "set_host_param could not find host no %u\n",
3121 ev->u.set_host_param.host_no);
3125 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3126 data, ev->u.set_host_param.len);
3127 scsi_host_put(shost);
3132 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3134 struct Scsi_Host *shost;
3135 struct iscsi_path *params;
3138 if (!transport->set_path)
3141 shost = scsi_host_lookup(ev->u.set_path.host_no);
3143 printk(KERN_ERR "set path could not find host no %u\n",
3144 ev->u.set_path.host_no);
3148 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3149 err = transport->set_path(shost, params);
3151 scsi_host_put(shost);
3155 static int iscsi_session_has_conns(int sid)
3157 struct iscsi_cls_conn *conn;
3158 unsigned long flags;
3161 spin_lock_irqsave(&connlock, flags);
3162 list_for_each_entry(conn, &connlist, conn_list) {
3163 if (iscsi_conn_get_sid(conn) == sid) {
3168 spin_unlock_irqrestore(&connlock, flags);
3174 iscsi_set_iface_params(struct iscsi_transport *transport,
3175 struct iscsi_uevent *ev, uint32_t len)
3177 char *data = (char *)ev + sizeof(*ev);
3178 struct Scsi_Host *shost;
3181 if (!transport->set_iface_param)
3184 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3186 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3187 ev->u.set_iface_params.host_no);
3191 err = transport->set_iface_param(shost, data, len);
3192 scsi_host_put(shost);
3197 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3199 struct Scsi_Host *shost;
3200 struct sockaddr *dst_addr;
3203 if (!transport->send_ping)
3206 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3208 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3209 ev->u.iscsi_ping.host_no);
3213 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3214 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3215 ev->u.iscsi_ping.iface_type,
3216 ev->u.iscsi_ping.payload_size,
3217 ev->u.iscsi_ping.pid,
3219 scsi_host_put(shost);
3224 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3226 struct iscsi_uevent *ev = nlmsg_data(nlh);
3227 struct Scsi_Host *shost = NULL;
3228 struct iscsi_chap_rec *chap_rec;
3229 struct iscsi_internal *priv;
3230 struct sk_buff *skbchap;
3231 struct nlmsghdr *nlhchap;
3232 struct iscsi_uevent *evchap;
3233 uint32_t chap_buf_size;
3237 if (!transport->get_chap)
3240 priv = iscsi_if_transport_lookup(transport);
3244 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3245 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3247 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3249 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3250 __func__, ev->u.get_chap.host_no);
3257 skbchap = alloc_skb(len, GFP_KERNEL);
3259 printk(KERN_ERR "can not deliver chap: OOM\n");
3264 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3265 (len - sizeof(*nlhchap)), 0);
3266 evchap = nlmsg_data(nlhchap);
3267 memset(evchap, 0, sizeof(*evchap));
3268 evchap->transport_handle = iscsi_handle(transport);
3269 evchap->type = nlh->nlmsg_type;
3270 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3271 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3272 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3273 buf = (char *)evchap + sizeof(*evchap);
3274 memset(buf, 0, chap_buf_size);
3276 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3277 &evchap->u.get_chap.num_entries, buf);
3279 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3280 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3281 nlhchap->nlmsg_len = actual_size;
3283 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3285 } while (err < 0 && err != -ECONNREFUSED);
3288 scsi_host_put(shost);
3292 static int iscsi_set_chap(struct iscsi_transport *transport,
3293 struct iscsi_uevent *ev, uint32_t len)
3295 char *data = (char *)ev + sizeof(*ev);
3296 struct Scsi_Host *shost;
3299 if (!transport->set_chap)
3302 shost = scsi_host_lookup(ev->u.set_path.host_no);
3304 pr_err("%s could not find host no %u\n",
3305 __func__, ev->u.set_path.host_no);
3309 err = transport->set_chap(shost, data, len);
3310 scsi_host_put(shost);
3314 static int iscsi_delete_chap(struct iscsi_transport *transport,
3315 struct iscsi_uevent *ev)
3317 struct Scsi_Host *shost;
3320 if (!transport->delete_chap)
3323 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3325 printk(KERN_ERR "%s could not find host no %u\n",
3326 __func__, ev->u.delete_chap.host_no);
3330 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3331 scsi_host_put(shost);
3335 static const struct {
3336 enum iscsi_discovery_parent_type value;
3338 } iscsi_discovery_parent_names[] = {
3339 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3340 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3341 {ISCSI_DISC_PARENT_ISNS, "isns" },
3344 char *iscsi_get_discovery_parent_name(int parent_type)
3347 char *state = "Unknown!";
3349 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3350 if (iscsi_discovery_parent_names[i].value & parent_type) {
3351 state = iscsi_discovery_parent_names[i].name;
3357 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3359 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3360 struct iscsi_uevent *ev, uint32_t len)
3362 char *data = (char *)ev + sizeof(*ev);
3363 struct Scsi_Host *shost;
3364 struct iscsi_bus_flash_session *fnode_sess;
3365 struct iscsi_bus_flash_conn *fnode_conn;
3370 if (!transport->set_flashnode_param) {
3372 goto exit_set_fnode;
3375 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3377 pr_err("%s could not find host no %u\n",
3378 __func__, ev->u.set_flashnode.host_no);
3380 goto exit_set_fnode;
3383 idx = ev->u.set_flashnode.flashnode_idx;
3384 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3386 pr_err("%s could not find flashnode %u for host no %u\n",
3387 __func__, idx, ev->u.set_flashnode.host_no);
3392 dev = iscsi_find_flashnode_conn(fnode_sess);
3398 fnode_conn = iscsi_dev_to_flash_conn(dev);
3399 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3403 put_device(&fnode_sess->dev);
3406 scsi_host_put(shost);
3412 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3413 struct iscsi_uevent *ev, uint32_t len)
3415 char *data = (char *)ev + sizeof(*ev);
3416 struct Scsi_Host *shost;
3420 if (!transport->new_flashnode) {
3422 goto exit_new_fnode;
3425 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3427 pr_err("%s could not find host no %u\n",
3428 __func__, ev->u.new_flashnode.host_no);
3433 index = transport->new_flashnode(shost, data, len);
3436 ev->r.new_flashnode_ret.flashnode_idx = index;
3441 scsi_host_put(shost);
3447 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3448 struct iscsi_uevent *ev)
3450 struct Scsi_Host *shost;
3451 struct iscsi_bus_flash_session *fnode_sess;
3455 if (!transport->del_flashnode) {
3457 goto exit_del_fnode;
3460 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3462 pr_err("%s could not find host no %u\n",
3463 __func__, ev->u.del_flashnode.host_no);
3468 idx = ev->u.del_flashnode.flashnode_idx;
3469 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3471 pr_err("%s could not find flashnode %u for host no %u\n",
3472 __func__, idx, ev->u.del_flashnode.host_no);
3477 err = transport->del_flashnode(fnode_sess);
3478 put_device(&fnode_sess->dev);
3481 scsi_host_put(shost);
3487 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3488 struct iscsi_uevent *ev)
3490 struct Scsi_Host *shost;
3491 struct iscsi_bus_flash_session *fnode_sess;
3492 struct iscsi_bus_flash_conn *fnode_conn;
3497 if (!transport->login_flashnode) {
3499 goto exit_login_fnode;
3502 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3504 pr_err("%s could not find host no %u\n",
3505 __func__, ev->u.login_flashnode.host_no);
3510 idx = ev->u.login_flashnode.flashnode_idx;
3511 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3513 pr_err("%s could not find flashnode %u for host no %u\n",
3514 __func__, idx, ev->u.login_flashnode.host_no);
3519 dev = iscsi_find_flashnode_conn(fnode_sess);
3525 fnode_conn = iscsi_dev_to_flash_conn(dev);
3526 err = transport->login_flashnode(fnode_sess, fnode_conn);
3530 put_device(&fnode_sess->dev);
3533 scsi_host_put(shost);
3539 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3540 struct iscsi_uevent *ev)
3542 struct Scsi_Host *shost;
3543 struct iscsi_bus_flash_session *fnode_sess;
3544 struct iscsi_bus_flash_conn *fnode_conn;
3549 if (!transport->logout_flashnode) {
3551 goto exit_logout_fnode;
3554 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3556 pr_err("%s could not find host no %u\n",
3557 __func__, ev->u.logout_flashnode.host_no);
3562 idx = ev->u.logout_flashnode.flashnode_idx;
3563 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3565 pr_err("%s could not find flashnode %u for host no %u\n",
3566 __func__, idx, ev->u.logout_flashnode.host_no);
3571 dev = iscsi_find_flashnode_conn(fnode_sess);
3577 fnode_conn = iscsi_dev_to_flash_conn(dev);
3579 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3583 put_device(&fnode_sess->dev);
3586 scsi_host_put(shost);
3592 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3593 struct iscsi_uevent *ev)
3595 struct Scsi_Host *shost;
3596 struct iscsi_cls_session *session;
3599 if (!transport->logout_flashnode_sid) {
3601 goto exit_logout_sid;
3604 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3606 pr_err("%s could not find host no %u\n",
3607 __func__, ev->u.logout_flashnode.host_no);
3612 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3614 pr_err("%s could not find session id %u\n",
3615 __func__, ev->u.logout_flashnode_sid.sid);
3620 err = transport->logout_flashnode_sid(session);
3623 scsi_host_put(shost);
3630 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3632 struct iscsi_uevent *ev = nlmsg_data(nlh);
3633 struct Scsi_Host *shost = NULL;
3634 struct iscsi_internal *priv;
3635 struct sk_buff *skbhost_stats;
3636 struct nlmsghdr *nlhhost_stats;
3637 struct iscsi_uevent *evhost_stats;
3638 int host_stats_size = 0;
3642 if (!transport->get_host_stats)
3645 priv = iscsi_if_transport_lookup(transport);
3649 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3650 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3652 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3654 pr_err("%s: failed. Could not find host no %u\n",
3655 __func__, ev->u.get_host_stats.host_no);
3662 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3663 if (!skbhost_stats) {
3664 pr_err("cannot deliver host stats: OOM\n");
3666 goto exit_host_stats;
3669 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3670 (len - sizeof(*nlhhost_stats)), 0);
3671 evhost_stats = nlmsg_data(nlhhost_stats);
3672 memset(evhost_stats, 0, sizeof(*evhost_stats));
3673 evhost_stats->transport_handle = iscsi_handle(transport);
3674 evhost_stats->type = nlh->nlmsg_type;
3675 evhost_stats->u.get_host_stats.host_no =
3676 ev->u.get_host_stats.host_no;
3677 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3678 memset(buf, 0, host_stats_size);
3680 err = transport->get_host_stats(shost, buf, host_stats_size);
3682 kfree_skb(skbhost_stats);
3683 goto exit_host_stats;
3686 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3687 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3688 nlhhost_stats->nlmsg_len = actual_size;
3690 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3692 } while (err < 0 && err != -ECONNREFUSED);
3695 scsi_host_put(shost);
3699 static int iscsi_if_transport_conn(struct iscsi_transport *transport,
3700 struct nlmsghdr *nlh)
3702 struct iscsi_uevent *ev = nlmsg_data(nlh);
3703 struct iscsi_cls_session *session;
3704 struct iscsi_cls_conn *conn = NULL;
3705 struct iscsi_endpoint *ep;
3709 switch (nlh->nlmsg_type) {
3710 case ISCSI_UEVENT_CREATE_CONN:
3711 return iscsi_if_create_conn(transport, ev);
3712 case ISCSI_UEVENT_DESTROY_CONN:
3713 return iscsi_if_destroy_conn(transport, ev);
3714 case ISCSI_UEVENT_STOP_CONN:
3715 return iscsi_if_stop_conn(transport, ev);
3719 * The following cmds need to be run under the ep_mutex so in kernel
3720 * conn cleanup (ep_disconnect + unbind and conn) is not done while
3721 * these are running. They also must not run if we have just run a conn
3722 * cleanup because they would set the state in a way that might allow
3723 * IO or send IO themselves.
3725 switch (nlh->nlmsg_type) {
3726 case ISCSI_UEVENT_START_CONN:
3727 conn = iscsi_conn_lookup(ev->u.start_conn.sid,
3728 ev->u.start_conn.cid);
3730 case ISCSI_UEVENT_BIND_CONN:
3731 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3733 case ISCSI_UEVENT_SEND_PDU:
3734 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3741 mutex_lock(&conn->ep_mutex);
3742 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
3743 mutex_unlock(&conn->ep_mutex);
3744 ev->r.retcode = -ENOTCONN;
3748 switch (nlh->nlmsg_type) {
3749 case ISCSI_UEVENT_BIND_CONN:
3752 * For offload boot support where iscsid is restarted
3753 * during the pivot root stage, the ep will be intact
3754 * here when the new iscsid instance starts up and
3757 iscsi_ep_disconnect(conn, true);
3760 session = iscsi_session_lookup(ev->u.b_conn.sid);
3766 ev->r.retcode = transport->bind_conn(session, conn,
3767 ev->u.b_conn.transport_eph,
3768 ev->u.b_conn.is_leading);
3770 conn->state = ISCSI_CONN_BOUND;
3772 if (ev->r.retcode || !transport->ep_connect)
3775 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3779 iscsi_put_endpoint(ep);
3782 iscsi_cls_conn_printk(KERN_ERR, conn,
3783 "Could not set ep conn binding\n");
3786 case ISCSI_UEVENT_START_CONN:
3787 ev->r.retcode = transport->start_conn(conn);
3789 conn->state = ISCSI_CONN_UP;
3791 case ISCSI_UEVENT_SEND_PDU:
3792 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev);
3794 if ((ev->u.send_pdu.hdr_size > pdu_len) ||
3795 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {
3800 ev->r.retcode = transport->send_pdu(conn,
3801 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)),
3802 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3803 ev->u.send_pdu.data_size);
3809 mutex_unlock(&conn->ep_mutex);
3814 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3818 struct iscsi_uevent *ev = nlmsg_data(nlh);
3819 struct iscsi_transport *transport = NULL;
3820 struct iscsi_internal *priv;
3821 struct iscsi_cls_session *session;
3822 struct iscsi_endpoint *ep = NULL;
3824 if (!netlink_capable(skb, CAP_SYS_ADMIN))
3827 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3828 *group = ISCSI_NL_GRP_UIP;
3830 *group = ISCSI_NL_GRP_ISCSID;
3832 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3835 transport = priv->iscsi_transport;
3837 if (!try_module_get(transport->owner))
3840 portid = NETLINK_CB(skb).portid;
3842 switch (nlh->nlmsg_type) {
3843 case ISCSI_UEVENT_CREATE_SESSION:
3844 err = iscsi_if_create_session(priv, ep, ev,
3846 ev->u.c_session.initial_cmdsn,
3847 ev->u.c_session.cmds_max,
3848 ev->u.c_session.queue_depth);
3850 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3851 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3857 err = iscsi_if_create_session(priv, ep, ev,
3859 ev->u.c_bound_session.initial_cmdsn,
3860 ev->u.c_bound_session.cmds_max,
3861 ev->u.c_bound_session.queue_depth);
3862 iscsi_put_endpoint(ep);
3864 case ISCSI_UEVENT_DESTROY_SESSION:
3865 session = iscsi_session_lookup(ev->u.d_session.sid);
3868 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3871 transport->destroy_session(session);
3873 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3874 session = iscsi_session_lookup(ev->u.d_session.sid);
3877 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3880 unsigned long flags;
3882 /* Prevent this session from being found again */
3883 spin_lock_irqsave(&sesslock, flags);
3884 list_del_init(&session->sess_list);
3885 spin_unlock_irqrestore(&sesslock, flags);
3887 queue_work(system_unbound_wq, &session->destroy_work);
3890 case ISCSI_UEVENT_UNBIND_SESSION:
3891 session = iscsi_session_lookup(ev->u.d_session.sid);
3893 scsi_queue_work(iscsi_session_to_shost(session),
3894 &session->unbind_work);
3898 case ISCSI_UEVENT_SET_PARAM:
3899 err = iscsi_set_param(transport, ev);
3901 case ISCSI_UEVENT_CREATE_CONN:
3902 case ISCSI_UEVENT_DESTROY_CONN:
3903 case ISCSI_UEVENT_STOP_CONN:
3904 case ISCSI_UEVENT_START_CONN:
3905 case ISCSI_UEVENT_BIND_CONN:
3906 case ISCSI_UEVENT_SEND_PDU:
3907 err = iscsi_if_transport_conn(transport, nlh);
3909 case ISCSI_UEVENT_GET_STATS:
3910 err = iscsi_if_get_stats(transport, nlh);
3912 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3913 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3914 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3915 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3916 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3918 case ISCSI_UEVENT_TGT_DSCVR:
3919 err = iscsi_tgt_dscvr(transport, ev);
3921 case ISCSI_UEVENT_SET_HOST_PARAM:
3922 err = iscsi_set_host_param(transport, ev);
3924 case ISCSI_UEVENT_PATH_UPDATE:
3925 err = iscsi_set_path(transport, ev);
3927 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3928 err = iscsi_set_iface_params(transport, ev,
3929 nlmsg_attrlen(nlh, sizeof(*ev)));
3931 case ISCSI_UEVENT_PING:
3932 err = iscsi_send_ping(transport, ev);
3934 case ISCSI_UEVENT_GET_CHAP:
3935 err = iscsi_get_chap(transport, nlh);
3937 case ISCSI_UEVENT_DELETE_CHAP:
3938 err = iscsi_delete_chap(transport, ev);
3940 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3941 err = iscsi_set_flashnode_param(transport, ev,
3945 case ISCSI_UEVENT_NEW_FLASHNODE:
3946 err = iscsi_new_flashnode(transport, ev,
3947 nlmsg_attrlen(nlh, sizeof(*ev)));
3949 case ISCSI_UEVENT_DEL_FLASHNODE:
3950 err = iscsi_del_flashnode(transport, ev);
3952 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3953 err = iscsi_login_flashnode(transport, ev);
3955 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3956 err = iscsi_logout_flashnode(transport, ev);
3958 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3959 err = iscsi_logout_flashnode_sid(transport, ev);
3961 case ISCSI_UEVENT_SET_CHAP:
3962 err = iscsi_set_chap(transport, ev,
3963 nlmsg_attrlen(nlh, sizeof(*ev)));
3965 case ISCSI_UEVENT_GET_HOST_STATS:
3966 err = iscsi_get_host_stats(transport, nlh);
3973 module_put(transport->owner);
3978 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3979 * Malformed skbs with wrong lengths or invalid creds are not processed.
3982 iscsi_if_rx(struct sk_buff *skb)
3984 u32 portid = NETLINK_CB(skb).portid;
3986 mutex_lock(&rx_queue_mutex);
3987 while (skb->len >= NLMSG_HDRLEN) {
3990 struct nlmsghdr *nlh;
3991 struct iscsi_uevent *ev;
3993 int retries = ISCSI_SEND_MAX_ALLOWED;
3995 nlh = nlmsg_hdr(skb);
3996 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3997 skb->len < nlh->nlmsg_len) {
4001 ev = nlmsg_data(nlh);
4002 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
4003 if (rlen > skb->len)
4006 err = iscsi_if_recv_msg(skb, nlh, &group);
4008 ev->type = ISCSI_KEVENT_IF_ERROR;
4013 * special case for GET_STATS:
4014 * on success - sending reply and stats from
4015 * inside of if_recv_msg(),
4016 * on error - fall through.
4018 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
4020 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
4022 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
4024 if (err == -EAGAIN && --retries < 0) {
4025 printk(KERN_WARNING "Send reply failed, error %d\n", err);
4028 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
4029 skb_pull(skb, rlen);
4031 mutex_unlock(&rx_queue_mutex);
4034 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
4035 struct device_attribute dev_attr_##_prefix##_##_name = \
4036 __ATTR(_name,_mode,_show,_store)
4039 * iSCSI connection attrs
4041 #define iscsi_conn_attr_show(param) \
4043 show_conn_param_##param(struct device *dev, \
4044 struct device_attribute *attr, char *buf) \
4046 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
4047 struct iscsi_transport *t = conn->transport; \
4048 return t->get_conn_param(conn, param, buf); \
4051 #define iscsi_conn_attr(field, param) \
4052 iscsi_conn_attr_show(param) \
4053 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
4056 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
4057 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
4058 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
4059 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
4060 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
4061 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
4062 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
4063 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
4064 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
4065 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
4066 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
4067 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
4068 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
4069 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
4070 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
4071 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
4072 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
4073 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
4074 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
4075 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
4076 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
4077 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
4078 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
4079 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
4080 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
4081 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
4082 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
4083 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
4085 static const char *const connection_state_names[] = {
4086 [ISCSI_CONN_UP] = "up",
4087 [ISCSI_CONN_DOWN] = "down",
4088 [ISCSI_CONN_FAILED] = "failed",
4089 [ISCSI_CONN_BOUND] = "bound"
4092 static ssize_t show_conn_state(struct device *dev,
4093 struct device_attribute *attr, char *buf)
4095 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
4096 const char *state = "unknown";
4098 if (conn->state >= 0 &&
4099 conn->state < ARRAY_SIZE(connection_state_names))
4100 state = connection_state_names[conn->state];
4102 return sysfs_emit(buf, "%s\n", state);
4104 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
4107 #define iscsi_conn_ep_attr_show(param) \
4108 static ssize_t show_conn_ep_param_##param(struct device *dev, \
4109 struct device_attribute *attr,\
4112 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
4113 struct iscsi_transport *t = conn->transport; \
4114 struct iscsi_endpoint *ep; \
4118 * Need to make sure ep_disconnect does not free the LLD's \
4119 * interconnect resources while we are trying to read them. \
4121 mutex_lock(&conn->ep_mutex); \
4123 if (!ep && t->ep_connect) { \
4124 mutex_unlock(&conn->ep_mutex); \
4129 rc = t->get_ep_param(ep, param, buf); \
4131 rc = t->get_conn_param(conn, param, buf); \
4132 mutex_unlock(&conn->ep_mutex); \
4136 #define iscsi_conn_ep_attr(field, param) \
4137 iscsi_conn_ep_attr_show(param) \
4138 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
4139 show_conn_ep_param_##param, NULL);
4141 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
4142 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
4144 static struct attribute *iscsi_conn_attrs[] = {
4145 &dev_attr_conn_max_recv_dlength.attr,
4146 &dev_attr_conn_max_xmit_dlength.attr,
4147 &dev_attr_conn_header_digest.attr,
4148 &dev_attr_conn_data_digest.attr,
4149 &dev_attr_conn_ifmarker.attr,
4150 &dev_attr_conn_ofmarker.attr,
4151 &dev_attr_conn_address.attr,
4152 &dev_attr_conn_port.attr,
4153 &dev_attr_conn_exp_statsn.attr,
4154 &dev_attr_conn_persistent_address.attr,
4155 &dev_attr_conn_persistent_port.attr,
4156 &dev_attr_conn_ping_tmo.attr,
4157 &dev_attr_conn_recv_tmo.attr,
4158 &dev_attr_conn_local_port.attr,
4159 &dev_attr_conn_statsn.attr,
4160 &dev_attr_conn_keepalive_tmo.attr,
4161 &dev_attr_conn_max_segment_size.attr,
4162 &dev_attr_conn_tcp_timestamp_stat.attr,
4163 &dev_attr_conn_tcp_wsf_disable.attr,
4164 &dev_attr_conn_tcp_nagle_disable.attr,
4165 &dev_attr_conn_tcp_timer_scale.attr,
4166 &dev_attr_conn_tcp_timestamp_enable.attr,
4167 &dev_attr_conn_fragment_disable.attr,
4168 &dev_attr_conn_ipv4_tos.attr,
4169 &dev_attr_conn_ipv6_traffic_class.attr,
4170 &dev_attr_conn_ipv6_flow_label.attr,
4171 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4172 &dev_attr_conn_tcp_xmit_wsf.attr,
4173 &dev_attr_conn_tcp_recv_wsf.attr,
4174 &dev_attr_conn_local_ipaddr.attr,
4175 &dev_attr_conn_state.attr,
4179 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4180 struct attribute *attr, int i)
4182 struct device *cdev = container_of(kobj, struct device, kobj);
4183 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4184 struct iscsi_transport *t = conn->transport;
4187 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4188 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4189 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4190 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4191 else if (attr == &dev_attr_conn_header_digest.attr)
4192 param = ISCSI_PARAM_HDRDGST_EN;
4193 else if (attr == &dev_attr_conn_data_digest.attr)
4194 param = ISCSI_PARAM_DATADGST_EN;
4195 else if (attr == &dev_attr_conn_ifmarker.attr)
4196 param = ISCSI_PARAM_IFMARKER_EN;
4197 else if (attr == &dev_attr_conn_ofmarker.attr)
4198 param = ISCSI_PARAM_OFMARKER_EN;
4199 else if (attr == &dev_attr_conn_address.attr)
4200 param = ISCSI_PARAM_CONN_ADDRESS;
4201 else if (attr == &dev_attr_conn_port.attr)
4202 param = ISCSI_PARAM_CONN_PORT;
4203 else if (attr == &dev_attr_conn_exp_statsn.attr)
4204 param = ISCSI_PARAM_EXP_STATSN;
4205 else if (attr == &dev_attr_conn_persistent_address.attr)
4206 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4207 else if (attr == &dev_attr_conn_persistent_port.attr)
4208 param = ISCSI_PARAM_PERSISTENT_PORT;
4209 else if (attr == &dev_attr_conn_ping_tmo.attr)
4210 param = ISCSI_PARAM_PING_TMO;
4211 else if (attr == &dev_attr_conn_recv_tmo.attr)
4212 param = ISCSI_PARAM_RECV_TMO;
4213 else if (attr == &dev_attr_conn_local_port.attr)
4214 param = ISCSI_PARAM_LOCAL_PORT;
4215 else if (attr == &dev_attr_conn_statsn.attr)
4216 param = ISCSI_PARAM_STATSN;
4217 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4218 param = ISCSI_PARAM_KEEPALIVE_TMO;
4219 else if (attr == &dev_attr_conn_max_segment_size.attr)
4220 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4221 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4222 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4223 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4224 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4225 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4226 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4227 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4228 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4229 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4230 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4231 else if (attr == &dev_attr_conn_fragment_disable.attr)
4232 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4233 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4234 param = ISCSI_PARAM_IPV4_TOS;
4235 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4236 param = ISCSI_PARAM_IPV6_TC;
4237 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4238 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4239 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4240 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4241 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4242 param = ISCSI_PARAM_TCP_XMIT_WSF;
4243 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4244 param = ISCSI_PARAM_TCP_RECV_WSF;
4245 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4246 param = ISCSI_PARAM_LOCAL_IPADDR;
4247 else if (attr == &dev_attr_conn_state.attr)
4250 WARN_ONCE(1, "Invalid conn attr");
4254 return t->attr_is_visible(ISCSI_PARAM, param);
4257 static struct attribute_group iscsi_conn_group = {
4258 .attrs = iscsi_conn_attrs,
4259 .is_visible = iscsi_conn_attr_is_visible,
4263 * iSCSI session attrs
4265 #define iscsi_session_attr_show(param, perm) \
4267 show_session_param_##param(struct device *dev, \
4268 struct device_attribute *attr, char *buf) \
4270 struct iscsi_cls_session *session = \
4271 iscsi_dev_to_session(dev->parent); \
4272 struct iscsi_transport *t = session->transport; \
4274 if (perm && !capable(CAP_SYS_ADMIN)) \
4276 return t->get_session_param(session, param, buf); \
4279 #define iscsi_session_attr(field, param, perm) \
4280 iscsi_session_attr_show(param, perm) \
4281 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4283 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4284 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4285 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4286 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4287 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4288 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4289 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4290 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4291 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4292 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4293 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4294 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4295 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4296 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4297 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4298 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4299 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4300 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4301 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4302 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4303 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4304 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4305 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4306 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4307 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4308 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4309 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4310 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4311 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4312 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4313 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4314 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4315 iscsi_session_attr(discovery_auth_optional,
4316 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4317 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4318 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4319 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4320 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4321 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4322 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4323 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4326 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4329 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4330 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));
4332 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4335 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4338 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4339 return sysfs_emit(buf, "%d\n", session->creator);
4341 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4344 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4347 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4348 return sysfs_emit(buf, "%d\n", session->target_id);
4350 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4351 show_priv_session_target_id, NULL);
4353 #define iscsi_priv_session_attr_show(field, format) \
4355 show_priv_session_##field(struct device *dev, \
4356 struct device_attribute *attr, char *buf) \
4358 struct iscsi_cls_session *session = \
4359 iscsi_dev_to_session(dev->parent); \
4360 if (session->field == -1) \
4361 return sysfs_emit(buf, "off\n"); \
4362 return sysfs_emit(buf, format"\n", session->field); \
4365 #define iscsi_priv_session_attr_store(field) \
4367 store_priv_session_##field(struct device *dev, \
4368 struct device_attribute *attr, \
4369 const char *buf, size_t count) \
4373 struct iscsi_cls_session *session = \
4374 iscsi_dev_to_session(dev->parent); \
4375 if ((session->state == ISCSI_SESSION_FREE) || \
4376 (session->state == ISCSI_SESSION_FAILED)) \
4378 if (strncmp(buf, "off", 3) == 0) { \
4379 session->field = -1; \
4380 session->field##_sysfs_override = true; \
4382 val = simple_strtoul(buf, &cp, 0); \
4383 if (*cp != '\0' && *cp != '\n') \
4385 session->field = val; \
4386 session->field##_sysfs_override = true; \
4391 #define iscsi_priv_session_rw_attr(field, format) \
4392 iscsi_priv_session_attr_show(field, format) \
4393 iscsi_priv_session_attr_store(field) \
4394 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4395 show_priv_session_##field, \
4396 store_priv_session_##field)
4398 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4400 static struct attribute *iscsi_session_attrs[] = {
4401 &dev_attr_sess_initial_r2t.attr,
4402 &dev_attr_sess_max_outstanding_r2t.attr,
4403 &dev_attr_sess_immediate_data.attr,
4404 &dev_attr_sess_first_burst_len.attr,
4405 &dev_attr_sess_max_burst_len.attr,
4406 &dev_attr_sess_data_pdu_in_order.attr,
4407 &dev_attr_sess_data_seq_in_order.attr,
4408 &dev_attr_sess_erl.attr,
4409 &dev_attr_sess_targetname.attr,
4410 &dev_attr_sess_tpgt.attr,
4411 &dev_attr_sess_password.attr,
4412 &dev_attr_sess_password_in.attr,
4413 &dev_attr_sess_username.attr,
4414 &dev_attr_sess_username_in.attr,
4415 &dev_attr_sess_fast_abort.attr,
4416 &dev_attr_sess_abort_tmo.attr,
4417 &dev_attr_sess_lu_reset_tmo.attr,
4418 &dev_attr_sess_tgt_reset_tmo.attr,
4419 &dev_attr_sess_ifacename.attr,
4420 &dev_attr_sess_initiatorname.attr,
4421 &dev_attr_sess_targetalias.attr,
4422 &dev_attr_sess_boot_root.attr,
4423 &dev_attr_sess_boot_nic.attr,
4424 &dev_attr_sess_boot_target.attr,
4425 &dev_attr_priv_sess_recovery_tmo.attr,
4426 &dev_attr_priv_sess_state.attr,
4427 &dev_attr_priv_sess_creator.attr,
4428 &dev_attr_sess_chap_out_idx.attr,
4429 &dev_attr_sess_chap_in_idx.attr,
4430 &dev_attr_priv_sess_target_id.attr,
4431 &dev_attr_sess_auto_snd_tgt_disable.attr,
4432 &dev_attr_sess_discovery_session.attr,
4433 &dev_attr_sess_portal_type.attr,
4434 &dev_attr_sess_chap_auth.attr,
4435 &dev_attr_sess_discovery_logout.attr,
4436 &dev_attr_sess_bidi_chap.attr,
4437 &dev_attr_sess_discovery_auth_optional.attr,
4438 &dev_attr_sess_def_time2wait.attr,
4439 &dev_attr_sess_def_time2retain.attr,
4440 &dev_attr_sess_isid.attr,
4441 &dev_attr_sess_tsid.attr,
4442 &dev_attr_sess_def_taskmgmt_tmo.attr,
4443 &dev_attr_sess_discovery_parent_idx.attr,
4444 &dev_attr_sess_discovery_parent_type.attr,
4448 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4449 struct attribute *attr, int i)
4451 struct device *cdev = container_of(kobj, struct device, kobj);
4452 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4453 struct iscsi_transport *t = session->transport;
4456 if (attr == &dev_attr_sess_initial_r2t.attr)
4457 param = ISCSI_PARAM_INITIAL_R2T_EN;
4458 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4459 param = ISCSI_PARAM_MAX_R2T;
4460 else if (attr == &dev_attr_sess_immediate_data.attr)
4461 param = ISCSI_PARAM_IMM_DATA_EN;
4462 else if (attr == &dev_attr_sess_first_burst_len.attr)
4463 param = ISCSI_PARAM_FIRST_BURST;
4464 else if (attr == &dev_attr_sess_max_burst_len.attr)
4465 param = ISCSI_PARAM_MAX_BURST;
4466 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4467 param = ISCSI_PARAM_PDU_INORDER_EN;
4468 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4469 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4470 else if (attr == &dev_attr_sess_erl.attr)
4471 param = ISCSI_PARAM_ERL;
4472 else if (attr == &dev_attr_sess_targetname.attr)
4473 param = ISCSI_PARAM_TARGET_NAME;
4474 else if (attr == &dev_attr_sess_tpgt.attr)
4475 param = ISCSI_PARAM_TPGT;
4476 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4477 param = ISCSI_PARAM_CHAP_IN_IDX;
4478 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4479 param = ISCSI_PARAM_CHAP_OUT_IDX;
4480 else if (attr == &dev_attr_sess_password.attr)
4481 param = ISCSI_PARAM_USERNAME;
4482 else if (attr == &dev_attr_sess_password_in.attr)
4483 param = ISCSI_PARAM_USERNAME_IN;
4484 else if (attr == &dev_attr_sess_username.attr)
4485 param = ISCSI_PARAM_PASSWORD;
4486 else if (attr == &dev_attr_sess_username_in.attr)
4487 param = ISCSI_PARAM_PASSWORD_IN;
4488 else if (attr == &dev_attr_sess_fast_abort.attr)
4489 param = ISCSI_PARAM_FAST_ABORT;
4490 else if (attr == &dev_attr_sess_abort_tmo.attr)
4491 param = ISCSI_PARAM_ABORT_TMO;
4492 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4493 param = ISCSI_PARAM_LU_RESET_TMO;
4494 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4495 param = ISCSI_PARAM_TGT_RESET_TMO;
4496 else if (attr == &dev_attr_sess_ifacename.attr)
4497 param = ISCSI_PARAM_IFACE_NAME;
4498 else if (attr == &dev_attr_sess_initiatorname.attr)
4499 param = ISCSI_PARAM_INITIATOR_NAME;
4500 else if (attr == &dev_attr_sess_targetalias.attr)
4501 param = ISCSI_PARAM_TARGET_ALIAS;
4502 else if (attr == &dev_attr_sess_boot_root.attr)
4503 param = ISCSI_PARAM_BOOT_ROOT;
4504 else if (attr == &dev_attr_sess_boot_nic.attr)
4505 param = ISCSI_PARAM_BOOT_NIC;
4506 else if (attr == &dev_attr_sess_boot_target.attr)
4507 param = ISCSI_PARAM_BOOT_TARGET;
4508 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4509 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4510 else if (attr == &dev_attr_sess_discovery_session.attr)
4511 param = ISCSI_PARAM_DISCOVERY_SESS;
4512 else if (attr == &dev_attr_sess_portal_type.attr)
4513 param = ISCSI_PARAM_PORTAL_TYPE;
4514 else if (attr == &dev_attr_sess_chap_auth.attr)
4515 param = ISCSI_PARAM_CHAP_AUTH_EN;
4516 else if (attr == &dev_attr_sess_discovery_logout.attr)
4517 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4518 else if (attr == &dev_attr_sess_bidi_chap.attr)
4519 param = ISCSI_PARAM_BIDI_CHAP_EN;
4520 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4521 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4522 else if (attr == &dev_attr_sess_def_time2wait.attr)
4523 param = ISCSI_PARAM_DEF_TIME2WAIT;
4524 else if (attr == &dev_attr_sess_def_time2retain.attr)
4525 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4526 else if (attr == &dev_attr_sess_isid.attr)
4527 param = ISCSI_PARAM_ISID;
4528 else if (attr == &dev_attr_sess_tsid.attr)
4529 param = ISCSI_PARAM_TSID;
4530 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4531 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4532 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4533 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4534 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4535 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4536 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4537 return S_IRUGO | S_IWUSR;
4538 else if (attr == &dev_attr_priv_sess_state.attr)
4540 else if (attr == &dev_attr_priv_sess_creator.attr)
4542 else if (attr == &dev_attr_priv_sess_target_id.attr)
4545 WARN_ONCE(1, "Invalid session attr");
4549 return t->attr_is_visible(ISCSI_PARAM, param);
4552 static struct attribute_group iscsi_session_group = {
4553 .attrs = iscsi_session_attrs,
4554 .is_visible = iscsi_session_attr_is_visible,
4560 #define iscsi_host_attr_show(param) \
4562 show_host_param_##param(struct device *dev, \
4563 struct device_attribute *attr, char *buf) \
4565 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4566 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4567 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4570 #define iscsi_host_attr(field, param) \
4571 iscsi_host_attr_show(param) \
4572 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4575 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4576 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4577 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4578 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4579 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4580 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4582 static struct attribute *iscsi_host_attrs[] = {
4583 &dev_attr_host_netdev.attr,
4584 &dev_attr_host_hwaddress.attr,
4585 &dev_attr_host_ipaddress.attr,
4586 &dev_attr_host_initiatorname.attr,
4587 &dev_attr_host_port_state.attr,
4588 &dev_attr_host_port_speed.attr,
4592 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4593 struct attribute *attr, int i)
4595 struct device *cdev = container_of(kobj, struct device, kobj);
4596 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4597 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4600 if (attr == &dev_attr_host_netdev.attr)
4601 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4602 else if (attr == &dev_attr_host_hwaddress.attr)
4603 param = ISCSI_HOST_PARAM_HWADDRESS;
4604 else if (attr == &dev_attr_host_ipaddress.attr)
4605 param = ISCSI_HOST_PARAM_IPADDRESS;
4606 else if (attr == &dev_attr_host_initiatorname.attr)
4607 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4608 else if (attr == &dev_attr_host_port_state.attr)
4609 param = ISCSI_HOST_PARAM_PORT_STATE;
4610 else if (attr == &dev_attr_host_port_speed.attr)
4611 param = ISCSI_HOST_PARAM_PORT_SPEED;
4613 WARN_ONCE(1, "Invalid host attr");
4617 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4620 static struct attribute_group iscsi_host_group = {
4621 .attrs = iscsi_host_attrs,
4622 .is_visible = iscsi_host_attr_is_visible,
4625 /* convert iscsi_port_speed values to ascii string name */
4626 static const struct {
4627 enum iscsi_port_speed value;
4629 } iscsi_port_speed_names[] = {
4630 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4631 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4632 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4633 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4634 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4635 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4636 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4639 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4642 char *speed = "Unknown!";
4643 struct iscsi_cls_host *ihost = shost->shost_data;
4644 uint32_t port_speed = ihost->port_speed;
4646 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4647 if (iscsi_port_speed_names[i].value & port_speed) {
4648 speed = iscsi_port_speed_names[i].name;
4654 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4656 /* convert iscsi_port_state values to ascii string name */
4657 static const struct {
4658 enum iscsi_port_state value;
4660 } iscsi_port_state_names[] = {
4661 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4662 {ISCSI_PORT_STATE_UP, "LINK UP" },
4665 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4668 char *state = "Unknown!";
4669 struct iscsi_cls_host *ihost = shost->shost_data;
4670 uint32_t port_state = ihost->port_state;
4672 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4673 if (iscsi_port_state_names[i].value & port_state) {
4674 state = iscsi_port_state_names[i].name;
4680 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4682 static int iscsi_session_match(struct attribute_container *cont,
4685 struct iscsi_cls_session *session;
4686 struct Scsi_Host *shost;
4687 struct iscsi_internal *priv;
4689 if (!iscsi_is_session_dev(dev))
4692 session = iscsi_dev_to_session(dev);
4693 shost = iscsi_session_to_shost(session);
4694 if (!shost->transportt)
4697 priv = to_iscsi_internal(shost->transportt);
4698 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4701 return &priv->session_cont.ac == cont;
4704 static int iscsi_conn_match(struct attribute_container *cont,
4707 struct iscsi_cls_session *session;
4708 struct iscsi_cls_conn *conn;
4709 struct Scsi_Host *shost;
4710 struct iscsi_internal *priv;
4712 if (!iscsi_is_conn_dev(dev))
4715 conn = iscsi_dev_to_conn(dev);
4716 session = iscsi_dev_to_session(conn->dev.parent);
4717 shost = iscsi_session_to_shost(session);
4719 if (!shost->transportt)
4722 priv = to_iscsi_internal(shost->transportt);
4723 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4726 return &priv->conn_cont.ac == cont;
4729 static int iscsi_host_match(struct attribute_container *cont,
4732 struct Scsi_Host *shost;
4733 struct iscsi_internal *priv;
4735 if (!scsi_is_host_device(dev))
4738 shost = dev_to_shost(dev);
4739 if (!shost->transportt ||
4740 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4743 priv = to_iscsi_internal(shost->transportt);
4744 return &priv->t.host_attrs.ac == cont;
4747 struct scsi_transport_template *
4748 iscsi_register_transport(struct iscsi_transport *tt)
4750 struct iscsi_internal *priv;
4751 unsigned long flags;
4755 WARN_ON(tt->ep_disconnect && !tt->unbind_conn);
4757 priv = iscsi_if_transport_lookup(tt);
4761 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4764 INIT_LIST_HEAD(&priv->list);
4765 priv->iscsi_transport = tt;
4766 priv->t.user_scan = iscsi_user_scan;
4767 priv->t.create_work_queue = 1;
4769 priv->dev.class = &iscsi_transport_class;
4770 dev_set_name(&priv->dev, "%s", tt->name);
4771 err = device_register(&priv->dev);
4775 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4777 goto unregister_dev;
4779 /* host parameters */
4780 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4781 priv->t.host_attrs.ac.match = iscsi_host_match;
4782 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4783 priv->t.host_size = sizeof(struct iscsi_cls_host);
4784 transport_container_register(&priv->t.host_attrs);
4786 /* connection parameters */
4787 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4788 priv->conn_cont.ac.match = iscsi_conn_match;
4789 priv->conn_cont.ac.grp = &iscsi_conn_group;
4790 transport_container_register(&priv->conn_cont);
4792 /* session parameters */
4793 priv->session_cont.ac.class = &iscsi_session_class.class;
4794 priv->session_cont.ac.match = iscsi_session_match;
4795 priv->session_cont.ac.grp = &iscsi_session_group;
4796 transport_container_register(&priv->session_cont);
4798 spin_lock_irqsave(&iscsi_transport_lock, flags);
4799 list_add(&priv->list, &iscsi_transports);
4800 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4802 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4806 device_unregister(&priv->dev);
4812 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4814 int iscsi_unregister_transport(struct iscsi_transport *tt)
4816 struct iscsi_internal *priv;
4817 unsigned long flags;
4821 mutex_lock(&rx_queue_mutex);
4823 priv = iscsi_if_transport_lookup(tt);
4826 spin_lock_irqsave(&iscsi_transport_lock, flags);
4827 list_del(&priv->list);
4828 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4830 transport_container_unregister(&priv->conn_cont);
4831 transport_container_unregister(&priv->session_cont);
4832 transport_container_unregister(&priv->t.host_attrs);
4834 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4835 device_unregister(&priv->dev);
4836 mutex_unlock(&rx_queue_mutex);
4840 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4842 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4843 struct device *dev, const char *fmt, ...)
4845 struct va_format vaf;
4848 va_start(args, fmt);
4854 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4856 static __init int iscsi_transport_init(void)
4859 struct netlink_kernel_cfg cfg = {
4861 .input = iscsi_if_rx,
4863 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4864 ISCSI_TRANSPORT_VERSION);
4866 atomic_set(&iscsi_session_nr, 0);
4868 err = class_register(&iscsi_transport_class);
4872 err = class_register(&iscsi_endpoint_class);
4874 goto unregister_transport_class;
4876 err = class_register(&iscsi_iface_class);
4878 goto unregister_endpoint_class;
4880 err = transport_class_register(&iscsi_host_class);
4882 goto unregister_iface_class;
4884 err = transport_class_register(&iscsi_connection_class);
4886 goto unregister_host_class;
4888 err = transport_class_register(&iscsi_session_class);
4890 goto unregister_conn_class;
4892 err = bus_register(&iscsi_flashnode_bus);
4894 goto unregister_session_class;
4896 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4899 goto unregister_flashnode_bus;
4902 iscsi_eh_timer_workq = alloc_workqueue("%s",
4903 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
4905 if (!iscsi_eh_timer_workq) {
4910 iscsi_conn_cleanup_workq = alloc_workqueue("%s",
4911 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0,
4912 "iscsi_conn_cleanup");
4913 if (!iscsi_conn_cleanup_workq) {
4921 destroy_workqueue(iscsi_eh_timer_workq);
4923 netlink_kernel_release(nls);
4924 unregister_flashnode_bus:
4925 bus_unregister(&iscsi_flashnode_bus);
4926 unregister_session_class:
4927 transport_class_unregister(&iscsi_session_class);
4928 unregister_conn_class:
4929 transport_class_unregister(&iscsi_connection_class);
4930 unregister_host_class:
4931 transport_class_unregister(&iscsi_host_class);
4932 unregister_iface_class:
4933 class_unregister(&iscsi_iface_class);
4934 unregister_endpoint_class:
4935 class_unregister(&iscsi_endpoint_class);
4936 unregister_transport_class:
4937 class_unregister(&iscsi_transport_class);
4941 static void __exit iscsi_transport_exit(void)
4943 destroy_workqueue(iscsi_conn_cleanup_workq);
4944 destroy_workqueue(iscsi_eh_timer_workq);
4945 netlink_kernel_release(nls);
4946 bus_unregister(&iscsi_flashnode_bus);
4947 transport_class_unregister(&iscsi_connection_class);
4948 transport_class_unregister(&iscsi_session_class);
4949 transport_class_unregister(&iscsi_host_class);
4950 class_unregister(&iscsi_endpoint_class);
4951 class_unregister(&iscsi_iface_class);
4952 class_unregister(&iscsi_transport_class);
4955 module_init(iscsi_transport_init);
4956 module_exit(iscsi_transport_exit);
4958 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4959 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4960 "Alex Aizman <itn780@yahoo.com>");
4961 MODULE_DESCRIPTION("iSCSI Transport Interface");
4962 MODULE_LICENSE("GPL");
4963 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4964 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);