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 DEFINE_IDA(iscsi_sess_ida);
94 * list of registered transports and lock that must
95 * be held while accessing list. The iscsi_transport_lock must
96 * be acquired after the rx_queue_mutex.
98 static LIST_HEAD(iscsi_transports);
99 static DEFINE_SPINLOCK(iscsi_transport_lock);
101 #define to_iscsi_internal(tmpl) \
102 container_of(tmpl, struct iscsi_internal, t)
104 #define dev_to_iscsi_internal(_dev) \
105 container_of(_dev, struct iscsi_internal, dev)
107 static void iscsi_transport_release(struct device *dev)
109 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
114 * iscsi_transport_class represents the iscsi_transports that are
117 static struct class iscsi_transport_class = {
118 .name = "iscsi_transport",
119 .dev_release = iscsi_transport_release,
123 show_transport_handle(struct device *dev, struct device_attribute *attr,
126 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
128 if (!capable(CAP_SYS_ADMIN))
130 return sysfs_emit(buf, "%llu\n",
131 (unsigned long long)iscsi_handle(priv->iscsi_transport));
133 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
135 #define show_transport_attr(name, format) \
137 show_transport_##name(struct device *dev, \
138 struct device_attribute *attr,char *buf) \
140 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
141 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
143 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
145 show_transport_attr(caps, "0x%x");
147 static struct attribute *iscsi_transport_attrs[] = {
148 &dev_attr_handle.attr,
153 static struct attribute_group iscsi_transport_group = {
154 .attrs = iscsi_transport_attrs,
158 * iSCSI endpoint attrs
160 #define iscsi_dev_to_endpoint(_dev) \
161 container_of(_dev, struct iscsi_endpoint, dev)
163 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
164 struct device_attribute dev_attr_##_prefix##_##_name = \
165 __ATTR(_name,_mode,_show,_store)
167 static void iscsi_endpoint_release(struct device *dev)
169 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
173 static struct class iscsi_endpoint_class = {
174 .name = "iscsi_endpoint",
175 .dev_release = iscsi_endpoint_release,
179 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
181 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
182 return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id);
184 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
186 static struct attribute *iscsi_endpoint_attrs[] = {
187 &dev_attr_ep_handle.attr,
191 static struct attribute_group iscsi_endpoint_group = {
192 .attrs = iscsi_endpoint_attrs,
195 #define ISCSI_MAX_EPID -1
197 static int iscsi_match_epid(struct device *dev, const void *data)
199 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
200 const uint64_t *epid = data;
202 return *epid == ep->id;
205 struct iscsi_endpoint *
206 iscsi_create_endpoint(int dd_size)
209 struct iscsi_endpoint *ep;
213 for (id = 1; id < ISCSI_MAX_EPID; id++) {
214 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
221 if (id == ISCSI_MAX_EPID) {
222 printk(KERN_ERR "Too many connections. Max supported %u\n",
227 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
232 ep->dev.class = &iscsi_endpoint_class;
233 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
234 err = device_register(&ep->dev);
238 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
243 ep->dd_data = &ep[1];
247 device_unregister(&ep->dev);
254 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
256 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
258 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
259 device_unregister(&ep->dev);
261 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
263 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
265 struct iscsi_endpoint *ep;
268 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
273 ep = iscsi_dev_to_endpoint(dev);
275 * we can drop this now because the interface will prevent
276 * removals and lookups from racing.
281 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
284 * Interface to display network param to sysfs
287 static void iscsi_iface_release(struct device *dev)
289 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
290 struct device *parent = iface->dev.parent;
297 static struct class iscsi_iface_class = {
298 .name = "iscsi_iface",
299 .dev_release = iscsi_iface_release,
302 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
303 struct device_attribute dev_attr_##_prefix##_##_name = \
304 __ATTR(_name, _mode, _show, _store)
306 /* iface attrs show */
307 #define iscsi_iface_attr_show(type, name, param_type, param) \
309 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
312 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
313 struct iscsi_transport *t = iface->transport; \
314 return t->get_iface_param(iface, param_type, param, buf); \
317 #define iscsi_iface_net_attr(type, name, param) \
318 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
319 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
321 #define iscsi_iface_attr(type, name, param) \
322 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
323 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
325 /* generic read only ipv4 attribute */
326 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
327 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
328 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
329 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
330 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
331 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
332 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
333 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
334 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
335 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
336 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
337 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
338 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
339 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
340 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
341 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
342 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
343 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
344 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
345 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
346 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
347 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
348 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
349 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
350 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
351 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
352 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
353 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
354 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
356 /* generic read only ipv6 attribute */
357 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
358 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
359 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
360 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
361 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
362 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
363 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
364 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
365 iscsi_iface_net_attr(ipv6_iface, link_local_state,
366 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
367 iscsi_iface_net_attr(ipv6_iface, router_state,
368 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
369 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
370 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
371 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
372 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
373 iscsi_iface_net_attr(ipv6_iface, traffic_class,
374 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
375 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
376 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
377 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
378 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
379 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
380 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
381 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
382 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
383 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
384 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
385 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
387 /* common read only iface attribute */
388 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
389 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
390 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
391 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
392 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
393 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
394 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
395 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
396 iscsi_iface_net_attr(iface, tcp_nagle_disable,
397 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
398 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
399 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
400 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
401 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
402 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
403 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
405 /* common iscsi specific settings attributes */
406 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
407 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
408 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
409 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
410 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
411 iscsi_iface_attr(iface, data_seq_in_order,
412 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
413 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
414 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
415 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
416 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
417 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
418 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
419 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
420 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
421 iscsi_iface_attr(iface, discovery_auth_optional,
422 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
423 iscsi_iface_attr(iface, discovery_logout,
424 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
425 iscsi_iface_attr(iface, strict_login_comp_en,
426 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
427 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
429 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
430 struct attribute *attr, int i)
432 struct device *dev = container_of(kobj, struct device, kobj);
433 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
434 struct iscsi_transport *t = iface->transport;
437 if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
438 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
439 else if (attr == &dev_attr_iface_header_digest.attr)
440 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
441 else if (attr == &dev_attr_iface_data_digest.attr)
442 param = ISCSI_IFACE_PARAM_DATADGST_EN;
443 else if (attr == &dev_attr_iface_immediate_data.attr)
444 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
445 else if (attr == &dev_attr_iface_initial_r2t.attr)
446 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
447 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
448 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
449 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
450 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
451 else if (attr == &dev_attr_iface_erl.attr)
452 param = ISCSI_IFACE_PARAM_ERL;
453 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
454 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
455 else if (attr == &dev_attr_iface_first_burst_len.attr)
456 param = ISCSI_IFACE_PARAM_FIRST_BURST;
457 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
458 param = ISCSI_IFACE_PARAM_MAX_R2T;
459 else if (attr == &dev_attr_iface_max_burst_len.attr)
460 param = ISCSI_IFACE_PARAM_MAX_BURST;
461 else if (attr == &dev_attr_iface_chap_auth.attr)
462 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
463 else if (attr == &dev_attr_iface_bidi_chap.attr)
464 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
465 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
466 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
467 else if (attr == &dev_attr_iface_discovery_logout.attr)
468 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
469 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
470 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
471 else if (attr == &dev_attr_iface_initiator_name.attr)
472 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
475 return t->attr_is_visible(ISCSI_IFACE_PARAM, param);
477 if (attr == &dev_attr_iface_enabled.attr)
478 param = ISCSI_NET_PARAM_IFACE_ENABLE;
479 else if (attr == &dev_attr_iface_vlan_id.attr)
480 param = ISCSI_NET_PARAM_VLAN_ID;
481 else if (attr == &dev_attr_iface_vlan_priority.attr)
482 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
483 else if (attr == &dev_attr_iface_vlan_enabled.attr)
484 param = ISCSI_NET_PARAM_VLAN_ENABLED;
485 else if (attr == &dev_attr_iface_mtu.attr)
486 param = ISCSI_NET_PARAM_MTU;
487 else if (attr == &dev_attr_iface_port.attr)
488 param = ISCSI_NET_PARAM_PORT;
489 else if (attr == &dev_attr_iface_ipaddress_state.attr)
490 param = ISCSI_NET_PARAM_IPADDR_STATE;
491 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
492 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
493 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
494 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
495 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
496 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
497 else if (attr == &dev_attr_iface_tcp_wsf.attr)
498 param = ISCSI_NET_PARAM_TCP_WSF;
499 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
500 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
501 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
502 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
503 else if (attr == &dev_attr_iface_cache_id.attr)
504 param = ISCSI_NET_PARAM_CACHE_ID;
505 else if (attr == &dev_attr_iface_redirect_en.attr)
506 param = ISCSI_NET_PARAM_REDIRECT_EN;
507 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
508 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
509 param = ISCSI_NET_PARAM_IPV4_ADDR;
510 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
511 param = ISCSI_NET_PARAM_IPV4_GW;
512 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
513 param = ISCSI_NET_PARAM_IPV4_SUBNET;
514 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
515 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
517 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
518 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
520 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
521 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
522 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
523 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
524 else if (attr == &dev_attr_ipv4_iface_tos.attr)
525 param = ISCSI_NET_PARAM_IPV4_TOS;
526 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
527 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
529 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
530 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
531 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
532 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
534 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
535 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
537 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
538 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
539 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
540 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
542 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
543 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
545 &dev_attr_ipv4_iface_fragment_disable.attr)
546 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
548 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
549 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
550 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
551 param = ISCSI_NET_PARAM_IPV4_TTL;
554 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
555 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
556 param = ISCSI_NET_PARAM_IPV6_ADDR;
557 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
558 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
559 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
560 param = ISCSI_NET_PARAM_IPV6_ROUTER;
561 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
562 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
563 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
564 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
565 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
566 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
567 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
568 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
570 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
571 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
572 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
573 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
574 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
575 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
576 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
577 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
578 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
579 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
580 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
581 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
582 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
583 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
584 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
585 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
586 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
587 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
588 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
589 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
593 WARN_ONCE(1, "Invalid iface attr");
597 return t->attr_is_visible(ISCSI_NET_PARAM, param);
600 static struct attribute *iscsi_iface_attrs[] = {
601 &dev_attr_iface_enabled.attr,
602 &dev_attr_iface_vlan_id.attr,
603 &dev_attr_iface_vlan_priority.attr,
604 &dev_attr_iface_vlan_enabled.attr,
605 &dev_attr_ipv4_iface_ipaddress.attr,
606 &dev_attr_ipv4_iface_gateway.attr,
607 &dev_attr_ipv4_iface_subnet.attr,
608 &dev_attr_ipv4_iface_bootproto.attr,
609 &dev_attr_ipv6_iface_ipaddress.attr,
610 &dev_attr_ipv6_iface_link_local_addr.attr,
611 &dev_attr_ipv6_iface_router_addr.attr,
612 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
613 &dev_attr_ipv6_iface_link_local_autocfg.attr,
614 &dev_attr_iface_mtu.attr,
615 &dev_attr_iface_port.attr,
616 &dev_attr_iface_ipaddress_state.attr,
617 &dev_attr_iface_delayed_ack_en.attr,
618 &dev_attr_iface_tcp_nagle_disable.attr,
619 &dev_attr_iface_tcp_wsf_disable.attr,
620 &dev_attr_iface_tcp_wsf.attr,
621 &dev_attr_iface_tcp_timer_scale.attr,
622 &dev_attr_iface_tcp_timestamp_en.attr,
623 &dev_attr_iface_cache_id.attr,
624 &dev_attr_iface_redirect_en.attr,
625 &dev_attr_iface_def_taskmgmt_tmo.attr,
626 &dev_attr_iface_header_digest.attr,
627 &dev_attr_iface_data_digest.attr,
628 &dev_attr_iface_immediate_data.attr,
629 &dev_attr_iface_initial_r2t.attr,
630 &dev_attr_iface_data_seq_in_order.attr,
631 &dev_attr_iface_data_pdu_in_order.attr,
632 &dev_attr_iface_erl.attr,
633 &dev_attr_iface_max_recv_dlength.attr,
634 &dev_attr_iface_first_burst_len.attr,
635 &dev_attr_iface_max_outstanding_r2t.attr,
636 &dev_attr_iface_max_burst_len.attr,
637 &dev_attr_iface_chap_auth.attr,
638 &dev_attr_iface_bidi_chap.attr,
639 &dev_attr_iface_discovery_auth_optional.attr,
640 &dev_attr_iface_discovery_logout.attr,
641 &dev_attr_iface_strict_login_comp_en.attr,
642 &dev_attr_iface_initiator_name.attr,
643 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
644 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
645 &dev_attr_ipv4_iface_tos_en.attr,
646 &dev_attr_ipv4_iface_tos.attr,
647 &dev_attr_ipv4_iface_grat_arp_en.attr,
648 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
649 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
650 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
651 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
652 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
653 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
654 &dev_attr_ipv4_iface_fragment_disable.attr,
655 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
656 &dev_attr_ipv4_iface_ttl.attr,
657 &dev_attr_ipv6_iface_link_local_state.attr,
658 &dev_attr_ipv6_iface_router_state.attr,
659 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
660 &dev_attr_ipv6_iface_mld_en.attr,
661 &dev_attr_ipv6_iface_flow_label.attr,
662 &dev_attr_ipv6_iface_traffic_class.attr,
663 &dev_attr_ipv6_iface_hop_limit.attr,
664 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
665 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
666 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
667 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
668 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
672 static struct attribute_group iscsi_iface_group = {
673 .attrs = iscsi_iface_attrs,
674 .is_visible = iscsi_iface_attr_is_visible,
677 /* convert iscsi_ipaddress_state values to ascii string name */
678 static const struct {
679 enum iscsi_ipaddress_state value;
681 } iscsi_ipaddress_state_names[] = {
682 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
683 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
684 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
685 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
686 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
687 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
688 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
691 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
696 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
697 if (iscsi_ipaddress_state_names[i].value == port_state) {
698 state = iscsi_ipaddress_state_names[i].name;
704 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
706 /* convert iscsi_router_state values to ascii string name */
707 static const struct {
708 enum iscsi_router_state value;
710 } iscsi_router_state_names[] = {
711 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
712 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
713 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
714 {ISCSI_ROUTER_STATE_STALE, "Stale" },
717 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
722 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
723 if (iscsi_router_state_names[i].value == router_state) {
724 state = iscsi_router_state_names[i].name;
730 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
733 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
734 uint32_t iface_type, uint32_t iface_num, int dd_size)
736 struct iscsi_iface *iface;
739 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
743 iface->transport = transport;
744 iface->iface_type = iface_type;
745 iface->iface_num = iface_num;
746 iface->dev.release = iscsi_iface_release;
747 iface->dev.class = &iscsi_iface_class;
748 /* parent reference released in iscsi_iface_release */
749 iface->dev.parent = get_device(&shost->shost_gendev);
750 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
751 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
754 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
757 err = device_register(&iface->dev);
761 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
766 iface->dd_data = &iface[1];
770 device_unregister(&iface->dev);
774 put_device(iface->dev.parent);
778 EXPORT_SYMBOL_GPL(iscsi_create_iface);
780 void iscsi_destroy_iface(struct iscsi_iface *iface)
782 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
783 device_unregister(&iface->dev);
785 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
788 * Interface to display flash node params to sysfs
791 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
792 struct device_attribute dev_attr_##_prefix##_##_name = \
793 __ATTR(_name, _mode, _show, _store)
795 /* flash node session attrs show */
796 #define iscsi_flashnode_sess_attr_show(type, name, param) \
798 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
801 struct iscsi_bus_flash_session *fnode_sess = \
802 iscsi_dev_to_flash_session(dev);\
803 struct iscsi_transport *t = fnode_sess->transport; \
804 return t->get_flashnode_param(fnode_sess, param, buf); \
808 #define iscsi_flashnode_sess_attr(type, name, param) \
809 iscsi_flashnode_sess_attr_show(type, name, param) \
810 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
811 show_##type##_##name, NULL);
813 /* Flash node session attributes */
815 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
816 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
817 iscsi_flashnode_sess_attr(fnode, discovery_session,
818 ISCSI_FLASHNODE_DISCOVERY_SESS);
819 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
820 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
821 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
822 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
823 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
824 ISCSI_FLASHNODE_DATASEQ_INORDER);
825 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
826 ISCSI_FLASHNODE_PDU_INORDER);
827 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
828 iscsi_flashnode_sess_attr(fnode, discovery_logout,
829 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
830 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
831 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
832 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
833 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
834 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
835 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
836 iscsi_flashnode_sess_attr(fnode, def_time2retain,
837 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
838 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
839 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
840 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
841 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
842 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
843 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
844 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
845 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
846 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
847 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
848 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
849 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
850 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
851 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
852 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
853 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
854 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
855 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
856 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
857 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
859 static struct attribute *iscsi_flashnode_sess_attrs[] = {
860 &dev_attr_fnode_auto_snd_tgt_disable.attr,
861 &dev_attr_fnode_discovery_session.attr,
862 &dev_attr_fnode_portal_type.attr,
863 &dev_attr_fnode_entry_enable.attr,
864 &dev_attr_fnode_immediate_data.attr,
865 &dev_attr_fnode_initial_r2t.attr,
866 &dev_attr_fnode_data_seq_in_order.attr,
867 &dev_attr_fnode_data_pdu_in_order.attr,
868 &dev_attr_fnode_chap_auth.attr,
869 &dev_attr_fnode_discovery_logout.attr,
870 &dev_attr_fnode_bidi_chap.attr,
871 &dev_attr_fnode_discovery_auth_optional.attr,
872 &dev_attr_fnode_erl.attr,
873 &dev_attr_fnode_first_burst_len.attr,
874 &dev_attr_fnode_def_time2wait.attr,
875 &dev_attr_fnode_def_time2retain.attr,
876 &dev_attr_fnode_max_outstanding_r2t.attr,
877 &dev_attr_fnode_isid.attr,
878 &dev_attr_fnode_tsid.attr,
879 &dev_attr_fnode_max_burst_len.attr,
880 &dev_attr_fnode_def_taskmgmt_tmo.attr,
881 &dev_attr_fnode_targetalias.attr,
882 &dev_attr_fnode_targetname.attr,
883 &dev_attr_fnode_tpgt.attr,
884 &dev_attr_fnode_discovery_parent_idx.attr,
885 &dev_attr_fnode_discovery_parent_type.attr,
886 &dev_attr_fnode_chap_in_idx.attr,
887 &dev_attr_fnode_chap_out_idx.attr,
888 &dev_attr_fnode_username.attr,
889 &dev_attr_fnode_username_in.attr,
890 &dev_attr_fnode_password.attr,
891 &dev_attr_fnode_password_in.attr,
892 &dev_attr_fnode_is_boot_target.attr,
896 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
897 struct attribute *attr,
900 struct device *dev = container_of(kobj, struct device, kobj);
901 struct iscsi_bus_flash_session *fnode_sess =
902 iscsi_dev_to_flash_session(dev);
903 struct iscsi_transport *t = fnode_sess->transport;
906 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
907 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
908 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
909 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
910 } else if (attr == &dev_attr_fnode_portal_type.attr) {
911 param = ISCSI_FLASHNODE_PORTAL_TYPE;
912 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
913 param = ISCSI_FLASHNODE_ENTRY_EN;
914 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
915 param = ISCSI_FLASHNODE_IMM_DATA_EN;
916 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
917 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
918 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
919 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
920 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
921 param = ISCSI_FLASHNODE_PDU_INORDER;
922 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
923 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
924 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
925 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
926 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
927 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
928 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
929 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
930 } else if (attr == &dev_attr_fnode_erl.attr) {
931 param = ISCSI_FLASHNODE_ERL;
932 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
933 param = ISCSI_FLASHNODE_FIRST_BURST;
934 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
935 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
936 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
937 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
938 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
939 param = ISCSI_FLASHNODE_MAX_R2T;
940 } else if (attr == &dev_attr_fnode_isid.attr) {
941 param = ISCSI_FLASHNODE_ISID;
942 } else if (attr == &dev_attr_fnode_tsid.attr) {
943 param = ISCSI_FLASHNODE_TSID;
944 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
945 param = ISCSI_FLASHNODE_MAX_BURST;
946 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
947 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
948 } else if (attr == &dev_attr_fnode_targetalias.attr) {
949 param = ISCSI_FLASHNODE_ALIAS;
950 } else if (attr == &dev_attr_fnode_targetname.attr) {
951 param = ISCSI_FLASHNODE_NAME;
952 } else if (attr == &dev_attr_fnode_tpgt.attr) {
953 param = ISCSI_FLASHNODE_TPGT;
954 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
955 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
956 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
957 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
958 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
959 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
960 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
961 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
962 } else if (attr == &dev_attr_fnode_username.attr) {
963 param = ISCSI_FLASHNODE_USERNAME;
964 } else if (attr == &dev_attr_fnode_username_in.attr) {
965 param = ISCSI_FLASHNODE_USERNAME_IN;
966 } else if (attr == &dev_attr_fnode_password.attr) {
967 param = ISCSI_FLASHNODE_PASSWORD;
968 } else if (attr == &dev_attr_fnode_password_in.attr) {
969 param = ISCSI_FLASHNODE_PASSWORD_IN;
970 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
971 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
973 WARN_ONCE(1, "Invalid flashnode session attr");
977 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
980 static struct attribute_group iscsi_flashnode_sess_attr_group = {
981 .attrs = iscsi_flashnode_sess_attrs,
982 .is_visible = iscsi_flashnode_sess_attr_is_visible,
985 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
986 &iscsi_flashnode_sess_attr_group,
990 static void iscsi_flashnode_sess_release(struct device *dev)
992 struct iscsi_bus_flash_session *fnode_sess =
993 iscsi_dev_to_flash_session(dev);
995 kfree(fnode_sess->targetname);
996 kfree(fnode_sess->targetalias);
997 kfree(fnode_sess->portal_type);
1001 static const struct device_type iscsi_flashnode_sess_dev_type = {
1002 .name = "iscsi_flashnode_sess_dev_type",
1003 .groups = iscsi_flashnode_sess_attr_groups,
1004 .release = iscsi_flashnode_sess_release,
1007 /* flash node connection attrs show */
1008 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1010 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1013 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1014 struct iscsi_bus_flash_session *fnode_sess = \
1015 iscsi_flash_conn_to_flash_session(fnode_conn);\
1016 struct iscsi_transport *t = fnode_conn->transport; \
1017 return t->get_flashnode_param(fnode_sess, param, buf); \
1021 #define iscsi_flashnode_conn_attr(type, name, param) \
1022 iscsi_flashnode_conn_attr_show(type, name, param) \
1023 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1024 show_##type##_##name, NULL);
1026 /* Flash node connection attributes */
1028 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1029 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1030 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1031 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1032 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1033 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1034 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1035 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1036 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1037 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1038 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1039 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1040 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1041 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1042 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1043 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1044 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1045 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1046 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1047 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1048 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1049 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1050 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1051 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1052 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1053 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1054 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1055 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1056 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1057 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1058 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1059 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1060 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1061 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1062 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1063 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1064 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1065 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1066 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1068 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1069 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1070 &dev_attr_fnode_header_digest.attr,
1071 &dev_attr_fnode_data_digest.attr,
1072 &dev_attr_fnode_snack_req.attr,
1073 &dev_attr_fnode_tcp_timestamp_stat.attr,
1074 &dev_attr_fnode_tcp_nagle_disable.attr,
1075 &dev_attr_fnode_tcp_wsf_disable.attr,
1076 &dev_attr_fnode_tcp_timer_scale.attr,
1077 &dev_attr_fnode_tcp_timestamp_enable.attr,
1078 &dev_attr_fnode_fragment_disable.attr,
1079 &dev_attr_fnode_max_recv_dlength.attr,
1080 &dev_attr_fnode_max_xmit_dlength.attr,
1081 &dev_attr_fnode_keepalive_tmo.attr,
1082 &dev_attr_fnode_port.attr,
1083 &dev_attr_fnode_ipaddress.attr,
1084 &dev_attr_fnode_redirect_ipaddr.attr,
1085 &dev_attr_fnode_max_segment_size.attr,
1086 &dev_attr_fnode_local_port.attr,
1087 &dev_attr_fnode_ipv4_tos.attr,
1088 &dev_attr_fnode_ipv6_traffic_class.attr,
1089 &dev_attr_fnode_ipv6_flow_label.attr,
1090 &dev_attr_fnode_link_local_ipv6.attr,
1091 &dev_attr_fnode_tcp_xmit_wsf.attr,
1092 &dev_attr_fnode_tcp_recv_wsf.attr,
1093 &dev_attr_fnode_statsn.attr,
1094 &dev_attr_fnode_exp_statsn.attr,
1098 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1099 struct attribute *attr,
1102 struct device *dev = container_of(kobj, struct device, kobj);
1103 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1104 struct iscsi_transport *t = fnode_conn->transport;
1107 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1108 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1109 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1110 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1111 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1112 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1113 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1114 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1115 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1116 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1117 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1118 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1119 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1120 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1121 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1122 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1123 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1124 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1125 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1126 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1127 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1128 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1129 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1130 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1131 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1132 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1133 } else if (attr == &dev_attr_fnode_port.attr) {
1134 param = ISCSI_FLASHNODE_PORT;
1135 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1136 param = ISCSI_FLASHNODE_IPADDR;
1137 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1138 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1139 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1140 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1141 } else if (attr == &dev_attr_fnode_local_port.attr) {
1142 param = ISCSI_FLASHNODE_LOCAL_PORT;
1143 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1144 param = ISCSI_FLASHNODE_IPV4_TOS;
1145 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1146 param = ISCSI_FLASHNODE_IPV6_TC;
1147 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1148 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1149 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1150 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1151 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1152 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1153 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1154 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1155 } else if (attr == &dev_attr_fnode_statsn.attr) {
1156 param = ISCSI_FLASHNODE_STATSN;
1157 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1158 param = ISCSI_FLASHNODE_EXP_STATSN;
1160 WARN_ONCE(1, "Invalid flashnode connection attr");
1164 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1167 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1168 .attrs = iscsi_flashnode_conn_attrs,
1169 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1172 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1173 &iscsi_flashnode_conn_attr_group,
1177 static void iscsi_flashnode_conn_release(struct device *dev)
1179 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1181 kfree(fnode_conn->ipaddress);
1182 kfree(fnode_conn->redirect_ipaddr);
1183 kfree(fnode_conn->link_local_ipv6_addr);
1187 static const struct device_type iscsi_flashnode_conn_dev_type = {
1188 .name = "iscsi_flashnode_conn_dev_type",
1189 .groups = iscsi_flashnode_conn_attr_groups,
1190 .release = iscsi_flashnode_conn_release,
1193 static struct bus_type iscsi_flashnode_bus;
1195 int iscsi_flashnode_bus_match(struct device *dev,
1196 struct device_driver *drv)
1198 if (dev->bus == &iscsi_flashnode_bus)
1202 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1204 static struct bus_type iscsi_flashnode_bus = {
1205 .name = "iscsi_flashnode",
1206 .match = &iscsi_flashnode_bus_match,
1210 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1211 * @shost: pointer to host data
1212 * @index: index of flashnode to add in sysfs
1213 * @transport: pointer to transport data
1214 * @dd_size: total size to allocate
1216 * Adds a sysfs entry for the flashnode session attributes
1219 * pointer to allocated flashnode sess on success
1222 struct iscsi_bus_flash_session *
1223 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1224 struct iscsi_transport *transport,
1227 struct iscsi_bus_flash_session *fnode_sess;
1230 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1234 fnode_sess->transport = transport;
1235 fnode_sess->target_id = index;
1236 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1237 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1238 fnode_sess->dev.parent = &shost->shost_gendev;
1239 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1240 shost->host_no, index);
1242 err = device_register(&fnode_sess->dev);
1244 goto free_fnode_sess;
1247 fnode_sess->dd_data = &fnode_sess[1];
1255 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1258 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1259 * @shost: pointer to host data
1260 * @fnode_sess: pointer to the parent flashnode session entry
1261 * @transport: pointer to transport data
1262 * @dd_size: total size to allocate
1264 * Adds a sysfs entry for the flashnode connection attributes
1267 * pointer to allocated flashnode conn on success
1270 struct iscsi_bus_flash_conn *
1271 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1272 struct iscsi_bus_flash_session *fnode_sess,
1273 struct iscsi_transport *transport,
1276 struct iscsi_bus_flash_conn *fnode_conn;
1279 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1283 fnode_conn->transport = transport;
1284 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1285 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1286 fnode_conn->dev.parent = &fnode_sess->dev;
1287 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1288 shost->host_no, fnode_sess->target_id);
1290 err = device_register(&fnode_conn->dev);
1292 goto free_fnode_conn;
1295 fnode_conn->dd_data = &fnode_conn[1];
1303 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1306 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1307 * @dev: device to verify
1308 * @data: pointer to data containing value to use for verification
1310 * Verifies if the passed device is flashnode conn device
1316 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1318 return dev->bus == &iscsi_flashnode_bus;
1321 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1323 device_unregister(&fnode_conn->dev);
1327 static int flashnode_match_index(struct device *dev, void *data)
1329 struct iscsi_bus_flash_session *fnode_sess = NULL;
1332 if (!iscsi_flashnode_bus_match(dev, NULL))
1333 goto exit_match_index;
1335 fnode_sess = iscsi_dev_to_flash_session(dev);
1336 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1343 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1344 * @shost: pointer to host data
1345 * @idx: index to match
1347 * Finds the flashnode session object for the passed index
1350 * pointer to found flashnode session object on success
1353 static struct iscsi_bus_flash_session *
1354 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1356 struct iscsi_bus_flash_session *fnode_sess = NULL;
1359 dev = device_find_child(&shost->shost_gendev, &idx,
1360 flashnode_match_index);
1362 fnode_sess = iscsi_dev_to_flash_session(dev);
1368 * iscsi_find_flashnode_sess - finds flashnode session entry
1369 * @shost: pointer to host data
1370 * @data: pointer to data containing value to use for comparison
1371 * @fn: function pointer that does actual comparison
1373 * Finds the flashnode session object comparing the data passed using logic
1374 * defined in passed function pointer
1377 * pointer to found flashnode session device object on success
1381 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1382 int (*fn)(struct device *dev, void *data))
1384 return device_find_child(&shost->shost_gendev, data, fn);
1386 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1389 * iscsi_find_flashnode_conn - finds flashnode connection entry
1390 * @fnode_sess: pointer to parent flashnode session entry
1392 * Finds the flashnode connection object comparing the data passed using logic
1393 * defined in passed function pointer
1396 * pointer to found flashnode connection device object on success
1400 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1402 return device_find_child(&fnode_sess->dev, NULL,
1403 iscsi_is_flashnode_conn_dev);
1405 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1407 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1409 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1412 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1416 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1417 * @fnode_sess: pointer to flashnode session entry to be destroyed
1419 * Deletes the flashnode session entry and all children flashnode connection
1420 * entries from sysfs
1422 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1426 err = device_for_each_child(&fnode_sess->dev, NULL,
1427 iscsi_iter_destroy_flashnode_conn_fn);
1429 pr_err("Could not delete all connections for %s. Error %d.\n",
1430 fnode_sess->dev.kobj.name, err);
1432 device_unregister(&fnode_sess->dev);
1434 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1436 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1438 if (!iscsi_flashnode_bus_match(dev, NULL))
1441 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1446 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1447 * @shost: pointer to host data
1449 * Destroys all the flashnode session entries and all corresponding children
1450 * flashnode connection entries from sysfs
1452 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1454 device_for_each_child(&shost->shost_gendev, NULL,
1455 iscsi_iter_destroy_flashnode_fn);
1457 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1463 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1464 * @job: bsg job to be processed
1466 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1468 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1469 struct iscsi_bsg_request *req = job->request;
1470 struct iscsi_bsg_reply *reply = job->reply;
1471 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1472 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1475 /* check if we have the msgcode value at least */
1476 if (job->request_len < sizeof(uint32_t)) {
1481 /* Validate the host command */
1482 switch (req->msgcode) {
1483 case ISCSI_BSG_HST_VENDOR:
1484 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1485 if ((shost->hostt->vendor_id == 0L) ||
1486 (req->rqst_data.h_vendor.vendor_id !=
1487 shost->hostt->vendor_id)) {
1497 /* check if we really have all the request data needed */
1498 if (job->request_len < cmdlen) {
1503 ret = i->iscsi_transport->bsg_request(job);
1508 /* return the errno failure code as the only status */
1509 BUG_ON(job->reply_len < sizeof(uint32_t));
1510 reply->reply_payload_rcv_len = 0;
1511 reply->result = ret;
1512 job->reply_len = sizeof(uint32_t);
1513 bsg_job_done(job, ret, 0);
1518 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1519 * @shost: shost for iscsi_host
1520 * @ihost: iscsi_cls_host adding the structures to
1523 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1525 struct device *dev = &shost->shost_gendev;
1526 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1527 struct request_queue *q;
1530 if (!i->iscsi_transport->bsg_request)
1533 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1534 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1536 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1537 "initialize - no request queue\n");
1540 __scsi_init_queue(shost, q);
1546 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1547 struct device *cdev)
1549 struct Scsi_Host *shost = dev_to_shost(dev);
1550 struct iscsi_cls_host *ihost = shost->shost_data;
1552 memset(ihost, 0, sizeof(*ihost));
1553 atomic_set(&ihost->nr_scans, 0);
1554 mutex_init(&ihost->mutex);
1556 iscsi_bsg_host_add(shost, ihost);
1557 /* ignore any bsg add error - we just can't do sgio */
1562 static int iscsi_remove_host(struct transport_container *tc,
1563 struct device *dev, struct device *cdev)
1565 struct Scsi_Host *shost = dev_to_shost(dev);
1566 struct iscsi_cls_host *ihost = shost->shost_data;
1568 bsg_remove_queue(ihost->bsg_q);
1572 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1578 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1584 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1590 static struct sock *nls;
1591 static DEFINE_MUTEX(rx_queue_mutex);
1593 static LIST_HEAD(sesslist);
1594 static DEFINE_SPINLOCK(sesslock);
1595 static LIST_HEAD(connlist);
1596 static DEFINE_SPINLOCK(connlock);
1598 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1600 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1605 * Returns the matching session to a given sid
1607 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1609 unsigned long flags;
1610 struct iscsi_cls_session *sess;
1612 spin_lock_irqsave(&sesslock, flags);
1613 list_for_each_entry(sess, &sesslist, sess_list) {
1614 if (sess->sid == sid) {
1615 spin_unlock_irqrestore(&sesslock, flags);
1619 spin_unlock_irqrestore(&sesslock, flags);
1624 * Returns the matching connection to a given sid / cid tuple
1626 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1628 unsigned long flags;
1629 struct iscsi_cls_conn *conn;
1631 spin_lock_irqsave(&connlock, flags);
1632 list_for_each_entry(conn, &connlist, conn_list) {
1633 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1634 spin_unlock_irqrestore(&connlock, flags);
1638 spin_unlock_irqrestore(&connlock, flags);
1643 * The following functions can be used by LLDs that allocate
1644 * their own scsi_hosts or by software iscsi LLDs
1649 } iscsi_session_state_names[] = {
1650 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1651 { ISCSI_SESSION_FAILED, "FAILED" },
1652 { ISCSI_SESSION_FREE, "FREE" },
1655 static const char *iscsi_session_state_name(int state)
1660 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1661 if (iscsi_session_state_names[i].value == state) {
1662 name = iscsi_session_state_names[i].name;
1669 int iscsi_session_chkready(struct iscsi_cls_session *session)
1671 unsigned long flags;
1674 spin_lock_irqsave(&session->lock, flags);
1675 switch (session->state) {
1676 case ISCSI_SESSION_LOGGED_IN:
1679 case ISCSI_SESSION_FAILED:
1680 err = DID_IMM_RETRY << 16;
1682 case ISCSI_SESSION_FREE:
1683 err = DID_TRANSPORT_FAILFAST << 16;
1686 err = DID_NO_CONNECT << 16;
1689 spin_unlock_irqrestore(&session->lock, flags);
1692 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1694 int iscsi_is_session_online(struct iscsi_cls_session *session)
1696 unsigned long flags;
1699 spin_lock_irqsave(&session->lock, flags);
1700 if (session->state == ISCSI_SESSION_LOGGED_IN)
1702 spin_unlock_irqrestore(&session->lock, flags);
1705 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1707 static void iscsi_session_release(struct device *dev)
1709 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1710 struct Scsi_Host *shost;
1712 shost = iscsi_session_to_shost(session);
1713 scsi_host_put(shost);
1714 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1718 int iscsi_is_session_dev(const struct device *dev)
1720 return dev->release == iscsi_session_release;
1722 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1724 static int iscsi_iter_session_fn(struct device *dev, void *data)
1726 void (* fn) (struct iscsi_cls_session *) = data;
1728 if (!iscsi_is_session_dev(dev))
1730 fn(iscsi_dev_to_session(dev));
1734 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1735 void (*fn)(struct iscsi_cls_session *))
1737 device_for_each_child(&shost->shost_gendev, fn,
1738 iscsi_iter_session_fn);
1740 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1743 * iscsi_scan_finished - helper to report when running scans are done
1745 * @time: scan run time
1747 * This function can be used by drives like qla4xxx to report to the scsi
1748 * layer when the scans it kicked off at module load time are done.
1750 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1752 struct iscsi_cls_host *ihost = shost->shost_data;
1754 * qla4xxx will have kicked off some session unblocks before calling
1755 * scsi_scan_host, so just wait for them to complete.
1757 return !atomic_read(&ihost->nr_scans);
1759 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1761 struct iscsi_scan_data {
1762 unsigned int channel;
1765 enum scsi_scan_mode rescan;
1768 static int iscsi_user_scan_session(struct device *dev, void *data)
1770 struct iscsi_scan_data *scan_data = data;
1771 struct iscsi_cls_session *session;
1772 struct Scsi_Host *shost;
1773 struct iscsi_cls_host *ihost;
1774 unsigned long flags;
1777 if (!iscsi_is_session_dev(dev))
1780 session = iscsi_dev_to_session(dev);
1782 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1784 shost = iscsi_session_to_shost(session);
1785 ihost = shost->shost_data;
1787 mutex_lock(&ihost->mutex);
1788 spin_lock_irqsave(&session->lock, flags);
1789 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1790 spin_unlock_irqrestore(&session->lock, flags);
1791 goto user_scan_exit;
1793 id = session->target_id;
1794 spin_unlock_irqrestore(&session->lock, flags);
1796 if (id != ISCSI_MAX_TARGET) {
1797 if ((scan_data->channel == SCAN_WILD_CARD ||
1798 scan_data->channel == 0) &&
1799 (scan_data->id == SCAN_WILD_CARD ||
1800 scan_data->id == id))
1801 scsi_scan_target(&session->dev, 0, id,
1802 scan_data->lun, scan_data->rescan);
1806 mutex_unlock(&ihost->mutex);
1807 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1811 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1814 struct iscsi_scan_data scan_data;
1816 scan_data.channel = channel;
1818 scan_data.lun = lun;
1819 scan_data.rescan = SCSI_SCAN_MANUAL;
1821 return device_for_each_child(&shost->shost_gendev, &scan_data,
1822 iscsi_user_scan_session);
1825 static void iscsi_scan_session(struct work_struct *work)
1827 struct iscsi_cls_session *session =
1828 container_of(work, struct iscsi_cls_session, scan_work);
1829 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1830 struct iscsi_cls_host *ihost = shost->shost_data;
1831 struct iscsi_scan_data scan_data;
1833 scan_data.channel = 0;
1834 scan_data.id = SCAN_WILD_CARD;
1835 scan_data.lun = SCAN_WILD_CARD;
1836 scan_data.rescan = SCSI_SCAN_RESCAN;
1838 iscsi_user_scan_session(&session->dev, &scan_data);
1839 atomic_dec(&ihost->nr_scans);
1843 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1844 * @cmd: scsi cmd passed to scsi eh handler
1846 * If the session is down this function will wait for the recovery
1847 * timer to fire or for the session to be logged back in. If the
1848 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1849 * should pass this error value to the scsi eh.
1851 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1853 struct iscsi_cls_session *session =
1854 starget_to_session(scsi_target(cmd->device));
1855 unsigned long flags;
1858 spin_lock_irqsave(&session->lock, flags);
1859 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1860 if (session->state == ISCSI_SESSION_FREE) {
1864 spin_unlock_irqrestore(&session->lock, flags);
1866 spin_lock_irqsave(&session->lock, flags);
1868 spin_unlock_irqrestore(&session->lock, flags);
1871 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1873 static void session_recovery_timedout(struct work_struct *work)
1875 struct iscsi_cls_session *session =
1876 container_of(work, struct iscsi_cls_session,
1877 recovery_work.work);
1878 unsigned long flags;
1880 iscsi_cls_session_printk(KERN_INFO, session,
1881 "session recovery timed out after %d secs\n",
1882 session->recovery_tmo);
1884 spin_lock_irqsave(&session->lock, flags);
1885 switch (session->state) {
1886 case ISCSI_SESSION_FAILED:
1887 session->state = ISCSI_SESSION_FREE;
1889 case ISCSI_SESSION_LOGGED_IN:
1890 case ISCSI_SESSION_FREE:
1891 /* we raced with the unblock's flush */
1892 spin_unlock_irqrestore(&session->lock, flags);
1895 spin_unlock_irqrestore(&session->lock, flags);
1897 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1898 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1899 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1901 if (session->transport->session_recovery_timedout)
1902 session->transport->session_recovery_timedout(session);
1905 static void __iscsi_unblock_session(struct work_struct *work)
1907 struct iscsi_cls_session *session =
1908 container_of(work, struct iscsi_cls_session,
1910 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1911 struct iscsi_cls_host *ihost = shost->shost_data;
1912 unsigned long flags;
1914 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1916 * The recovery and unblock work get run from the same workqueue,
1917 * so try to cancel it if it was going to run after this unblock.
1919 cancel_delayed_work(&session->recovery_work);
1920 spin_lock_irqsave(&session->lock, flags);
1921 session->state = ISCSI_SESSION_LOGGED_IN;
1922 spin_unlock_irqrestore(&session->lock, flags);
1924 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1926 * Only do kernel scanning if the driver is properly hooked into
1927 * the async scanning code (drivers like iscsi_tcp do login and
1928 * scanning from userspace).
1930 if (shost->hostt->scan_finished) {
1931 if (scsi_queue_work(shost, &session->scan_work))
1932 atomic_inc(&ihost->nr_scans);
1934 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1938 * iscsi_unblock_session - set a session as logged in and start IO.
1939 * @session: iscsi session
1941 * Mark a session as ready to accept IO.
1943 void iscsi_unblock_session(struct iscsi_cls_session *session)
1945 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1947 * make sure all the events have completed before tell the driver
1950 flush_workqueue(iscsi_eh_timer_workq);
1952 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1954 static void __iscsi_block_session(struct work_struct *work)
1956 struct iscsi_cls_session *session =
1957 container_of(work, struct iscsi_cls_session,
1959 unsigned long flags;
1961 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1962 spin_lock_irqsave(&session->lock, flags);
1963 session->state = ISCSI_SESSION_FAILED;
1964 spin_unlock_irqrestore(&session->lock, flags);
1965 scsi_target_block(&session->dev);
1966 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1967 if (session->recovery_tmo >= 0)
1968 queue_delayed_work(iscsi_eh_timer_workq,
1969 &session->recovery_work,
1970 session->recovery_tmo * HZ);
1973 void iscsi_block_session(struct iscsi_cls_session *session)
1975 queue_work(iscsi_eh_timer_workq, &session->block_work);
1977 EXPORT_SYMBOL_GPL(iscsi_block_session);
1979 static void __iscsi_unbind_session(struct work_struct *work)
1981 struct iscsi_cls_session *session =
1982 container_of(work, struct iscsi_cls_session,
1984 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1985 struct iscsi_cls_host *ihost = shost->shost_data;
1986 unsigned long flags;
1987 unsigned int target_id;
1989 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
1991 /* Prevent new scans and make sure scanning is not in progress */
1992 mutex_lock(&ihost->mutex);
1993 spin_lock_irqsave(&session->lock, flags);
1994 if (session->target_id == ISCSI_MAX_TARGET) {
1995 spin_unlock_irqrestore(&session->lock, flags);
1996 mutex_unlock(&ihost->mutex);
1997 goto unbind_session_exit;
2000 target_id = session->target_id;
2001 session->target_id = ISCSI_MAX_TARGET;
2002 spin_unlock_irqrestore(&session->lock, flags);
2003 mutex_unlock(&ihost->mutex);
2005 if (session->ida_used)
2006 ida_simple_remove(&iscsi_sess_ida, target_id);
2008 scsi_remove_target(&session->dev);
2010 unbind_session_exit:
2011 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2012 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2015 struct iscsi_cls_session *
2016 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2019 struct iscsi_cls_session *session;
2021 session = kzalloc(sizeof(*session) + dd_size,
2026 session->transport = transport;
2027 session->creator = -1;
2028 session->recovery_tmo = 120;
2029 session->recovery_tmo_sysfs_override = false;
2030 session->state = ISCSI_SESSION_FREE;
2031 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2032 INIT_LIST_HEAD(&session->sess_list);
2033 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2034 INIT_WORK(&session->block_work, __iscsi_block_session);
2035 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2036 INIT_WORK(&session->scan_work, iscsi_scan_session);
2037 spin_lock_init(&session->lock);
2039 /* this is released in the dev's release function */
2040 scsi_host_get(shost);
2041 session->dev.parent = &shost->shost_gendev;
2042 session->dev.release = iscsi_session_release;
2043 device_initialize(&session->dev);
2045 session->dd_data = &session[1];
2047 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2050 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2052 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2054 unsigned long flags;
2058 session->sid = atomic_add_return(1, &iscsi_session_nr);
2060 if (target_id == ISCSI_MAX_TARGET) {
2061 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2064 iscsi_cls_session_printk(KERN_ERR, session,
2065 "Failure in Target ID Allocation\n");
2068 session->target_id = (unsigned int)id;
2069 session->ida_used = true;
2071 session->target_id = target_id;
2073 dev_set_name(&session->dev, "session%u", session->sid);
2074 err = device_add(&session->dev);
2076 iscsi_cls_session_printk(KERN_ERR, session,
2077 "could not register session's dev\n");
2080 transport_register_device(&session->dev);
2082 spin_lock_irqsave(&sesslock, flags);
2083 list_add(&session->sess_list, &sesslist);
2084 spin_unlock_irqrestore(&sesslock, flags);
2086 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2087 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2091 if (session->ida_used)
2092 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2096 EXPORT_SYMBOL_GPL(iscsi_add_session);
2099 * iscsi_create_session - create iscsi class session
2101 * @transport: iscsi transport
2102 * @dd_size: private driver data size
2103 * @target_id: which target
2105 * This can be called from a LLD or iscsi_transport.
2107 struct iscsi_cls_session *
2108 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2109 int dd_size, unsigned int target_id)
2111 struct iscsi_cls_session *session;
2113 session = iscsi_alloc_session(shost, transport, dd_size);
2117 if (iscsi_add_session(session, target_id)) {
2118 iscsi_free_session(session);
2123 EXPORT_SYMBOL_GPL(iscsi_create_session);
2125 static void iscsi_conn_release(struct device *dev)
2127 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2128 struct device *parent = conn->dev.parent;
2130 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2135 static int iscsi_is_conn_dev(const struct device *dev)
2137 return dev->release == iscsi_conn_release;
2140 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2142 if (!iscsi_is_conn_dev(dev))
2144 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2147 void iscsi_remove_session(struct iscsi_cls_session *session)
2149 unsigned long flags;
2152 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2154 spin_lock_irqsave(&sesslock, flags);
2155 list_del(&session->sess_list);
2156 spin_unlock_irqrestore(&sesslock, flags);
2158 /* make sure there are no blocks/unblocks queued */
2159 flush_workqueue(iscsi_eh_timer_workq);
2160 /* make sure the timedout callout is not running */
2161 if (!cancel_delayed_work(&session->recovery_work))
2162 flush_workqueue(iscsi_eh_timer_workq);
2164 * If we are blocked let commands flow again. The lld or iscsi
2165 * layer should set up the queuecommand to fail commands.
2166 * We assume that LLD will not be calling block/unblock while
2167 * removing the session.
2169 spin_lock_irqsave(&session->lock, flags);
2170 session->state = ISCSI_SESSION_FREE;
2171 spin_unlock_irqrestore(&session->lock, flags);
2173 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2174 /* flush running scans then delete devices */
2175 flush_work(&session->scan_work);
2176 /* flush running unbind operations */
2177 flush_work(&session->unbind_work);
2178 __iscsi_unbind_session(&session->unbind_work);
2180 /* hw iscsi may not have removed all connections from session */
2181 err = device_for_each_child(&session->dev, NULL,
2182 iscsi_iter_destroy_conn_fn);
2184 iscsi_cls_session_printk(KERN_ERR, session,
2185 "Could not delete all connections "
2186 "for session. Error %d.\n", err);
2188 transport_unregister_device(&session->dev);
2190 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2191 device_del(&session->dev);
2193 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2195 void iscsi_free_session(struct iscsi_cls_session *session)
2197 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2198 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2199 put_device(&session->dev);
2201 EXPORT_SYMBOL_GPL(iscsi_free_session);
2204 * iscsi_create_conn - create iscsi class connection
2205 * @session: iscsi cls session
2206 * @dd_size: private driver data size
2207 * @cid: connection id
2209 * This can be called from a LLD or iscsi_transport. The connection
2210 * is child of the session so cid must be unique for all connections
2213 * Since we do not support MCS, cid will normally be zero. In some cases
2214 * for software iscsi we could be trying to preallocate a connection struct
2215 * in which case there could be two connection structs and cid would be
2218 struct iscsi_cls_conn *
2219 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2221 struct iscsi_transport *transport = session->transport;
2222 struct iscsi_cls_conn *conn;
2223 unsigned long flags;
2226 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2230 conn->dd_data = &conn[1];
2232 mutex_init(&conn->ep_mutex);
2233 INIT_LIST_HEAD(&conn->conn_list);
2234 conn->transport = transport;
2237 /* this is released in the dev's release function */
2238 if (!get_device(&session->dev))
2241 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2242 conn->dev.parent = &session->dev;
2243 conn->dev.release = iscsi_conn_release;
2244 err = device_register(&conn->dev);
2246 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2247 "register connection's dev\n");
2248 goto release_parent_ref;
2250 transport_register_device(&conn->dev);
2252 spin_lock_irqsave(&connlock, flags);
2253 list_add(&conn->conn_list, &connlist);
2254 spin_unlock_irqrestore(&connlock, flags);
2256 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2260 put_device(&session->dev);
2266 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2269 * iscsi_destroy_conn - destroy iscsi class connection
2270 * @conn: iscsi cls session
2272 * This can be called from a LLD or iscsi_transport.
2274 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2276 unsigned long flags;
2278 spin_lock_irqsave(&connlock, flags);
2279 list_del(&conn->conn_list);
2280 spin_unlock_irqrestore(&connlock, flags);
2282 transport_unregister_device(&conn->dev);
2283 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2284 device_unregister(&conn->dev);
2287 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2289 void iscsi_put_conn(struct iscsi_cls_conn *conn)
2291 put_device(&conn->dev);
2293 EXPORT_SYMBOL_GPL(iscsi_put_conn);
2295 void iscsi_get_conn(struct iscsi_cls_conn *conn)
2297 get_device(&conn->dev);
2299 EXPORT_SYMBOL_GPL(iscsi_get_conn);
2302 * iscsi interface functions
2304 static struct iscsi_internal *
2305 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2307 struct iscsi_internal *priv;
2308 unsigned long flags;
2310 spin_lock_irqsave(&iscsi_transport_lock, flags);
2311 list_for_each_entry(priv, &iscsi_transports, list) {
2312 if (tt == priv->iscsi_transport) {
2313 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2317 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2322 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2324 return nlmsg_multicast(nls, skb, 0, group, gfp);
2328 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2330 return nlmsg_unicast(nls, skb, portid);
2333 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2334 char *data, uint32_t data_size)
2336 struct nlmsghdr *nlh;
2337 struct sk_buff *skb;
2338 struct iscsi_uevent *ev;
2340 struct iscsi_internal *priv;
2341 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2344 priv = iscsi_if_transport_lookup(conn->transport);
2348 skb = alloc_skb(len, GFP_ATOMIC);
2350 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2351 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2352 "control PDU: OOM\n");
2356 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2357 ev = nlmsg_data(nlh);
2358 memset(ev, 0, sizeof(*ev));
2359 ev->transport_handle = iscsi_handle(conn->transport);
2360 ev->type = ISCSI_KEVENT_RECV_PDU;
2361 ev->r.recv_req.cid = conn->cid;
2362 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2363 pdu = (char*)ev + sizeof(*ev);
2364 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2365 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2367 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2369 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2371 int iscsi_offload_mesg(struct Scsi_Host *shost,
2372 struct iscsi_transport *transport, uint32_t type,
2373 char *data, uint16_t data_size)
2375 struct nlmsghdr *nlh;
2376 struct sk_buff *skb;
2377 struct iscsi_uevent *ev;
2378 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2380 skb = alloc_skb(len, GFP_ATOMIC);
2382 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2386 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2387 ev = nlmsg_data(nlh);
2388 memset(ev, 0, sizeof(*ev));
2390 ev->transport_handle = iscsi_handle(transport);
2392 case ISCSI_KEVENT_PATH_REQ:
2393 ev->r.req_path.host_no = shost->host_no;
2395 case ISCSI_KEVENT_IF_DOWN:
2396 ev->r.notify_if_down.host_no = shost->host_no;
2400 memcpy((char *)ev + sizeof(*ev), data, data_size);
2402 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2404 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2406 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2408 struct nlmsghdr *nlh;
2409 struct sk_buff *skb;
2410 struct iscsi_uevent *ev;
2411 struct iscsi_internal *priv;
2412 int len = nlmsg_total_size(sizeof(*ev));
2414 priv = iscsi_if_transport_lookup(conn->transport);
2418 skb = alloc_skb(len, GFP_ATOMIC);
2420 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2421 "conn error (%d)\n", error);
2425 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2426 ev = nlmsg_data(nlh);
2427 ev->transport_handle = iscsi_handle(conn->transport);
2428 ev->type = ISCSI_KEVENT_CONN_ERROR;
2429 ev->r.connerror.error = error;
2430 ev->r.connerror.cid = conn->cid;
2431 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2433 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2435 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2438 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2440 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2441 enum iscsi_conn_state state)
2443 struct nlmsghdr *nlh;
2444 struct sk_buff *skb;
2445 struct iscsi_uevent *ev;
2446 struct iscsi_internal *priv;
2447 int len = nlmsg_total_size(sizeof(*ev));
2449 priv = iscsi_if_transport_lookup(conn->transport);
2453 skb = alloc_skb(len, GFP_ATOMIC);
2455 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2456 "conn login (%d)\n", state);
2460 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2461 ev = nlmsg_data(nlh);
2462 ev->transport_handle = iscsi_handle(conn->transport);
2463 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2464 ev->r.conn_login.state = state;
2465 ev->r.conn_login.cid = conn->cid;
2466 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2467 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2469 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2472 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2474 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2475 enum iscsi_host_event_code code, uint32_t data_size,
2478 struct nlmsghdr *nlh;
2479 struct sk_buff *skb;
2480 struct iscsi_uevent *ev;
2481 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2483 skb = alloc_skb(len, GFP_NOIO);
2485 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2490 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2491 ev = nlmsg_data(nlh);
2492 ev->transport_handle = iscsi_handle(transport);
2493 ev->type = ISCSI_KEVENT_HOST_EVENT;
2494 ev->r.host_event.host_no = host_no;
2495 ev->r.host_event.code = code;
2496 ev->r.host_event.data_size = data_size;
2499 memcpy((char *)ev + sizeof(*ev), data, data_size);
2501 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2503 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2505 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2506 uint32_t status, uint32_t pid, uint32_t data_size,
2509 struct nlmsghdr *nlh;
2510 struct sk_buff *skb;
2511 struct iscsi_uevent *ev;
2512 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2514 skb = alloc_skb(len, GFP_NOIO);
2516 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2520 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2521 ev = nlmsg_data(nlh);
2522 ev->transport_handle = iscsi_handle(transport);
2523 ev->type = ISCSI_KEVENT_PING_COMP;
2524 ev->r.ping_comp.host_no = host_no;
2525 ev->r.ping_comp.status = status;
2526 ev->r.ping_comp.pid = pid;
2527 ev->r.ping_comp.data_size = data_size;
2528 memcpy((char *)ev + sizeof(*ev), data, data_size);
2530 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2532 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2535 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2537 struct sk_buff *skb;
2538 struct nlmsghdr *nlh;
2539 int len = nlmsg_total_size(size);
2541 skb = alloc_skb(len, GFP_ATOMIC);
2543 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2547 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2548 memcpy(nlmsg_data(nlh), payload, size);
2549 return iscsi_unicast_skb(skb, portid);
2553 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2555 struct iscsi_uevent *ev = nlmsg_data(nlh);
2556 struct iscsi_stats *stats;
2557 struct sk_buff *skbstat;
2558 struct iscsi_cls_conn *conn;
2559 struct nlmsghdr *nlhstat;
2560 struct iscsi_uevent *evstat;
2561 struct iscsi_internal *priv;
2562 int len = nlmsg_total_size(sizeof(*ev) +
2563 sizeof(struct iscsi_stats) +
2564 sizeof(struct iscsi_stats_custom) *
2565 ISCSI_STATS_CUSTOM_MAX);
2568 priv = iscsi_if_transport_lookup(transport);
2572 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2579 skbstat = alloc_skb(len, GFP_ATOMIC);
2581 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2582 "deliver stats: OOM\n");
2586 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2587 (len - sizeof(*nlhstat)), 0);
2588 evstat = nlmsg_data(nlhstat);
2589 memset(evstat, 0, sizeof(*evstat));
2590 evstat->transport_handle = iscsi_handle(conn->transport);
2591 evstat->type = nlh->nlmsg_type;
2592 evstat->u.get_stats.cid =
2593 ev->u.get_stats.cid;
2594 evstat->u.get_stats.sid =
2595 ev->u.get_stats.sid;
2596 stats = (struct iscsi_stats *)
2597 ((char*)evstat + sizeof(*evstat));
2598 memset(stats, 0, sizeof(*stats));
2600 transport->get_stats(conn, stats);
2601 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2602 sizeof(struct iscsi_stats) +
2603 sizeof(struct iscsi_stats_custom) *
2604 stats->custom_length);
2605 actual_size -= sizeof(*nlhstat);
2606 actual_size = nlmsg_msg_size(actual_size);
2607 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2608 nlhstat->nlmsg_len = actual_size;
2610 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2612 } while (err < 0 && err != -ECONNREFUSED);
2618 * iscsi_session_event - send session destr. completion event
2619 * @session: iscsi class session
2620 * @event: type of event
2622 int iscsi_session_event(struct iscsi_cls_session *session,
2623 enum iscsi_uevent_e event)
2625 struct iscsi_internal *priv;
2626 struct Scsi_Host *shost;
2627 struct iscsi_uevent *ev;
2628 struct sk_buff *skb;
2629 struct nlmsghdr *nlh;
2630 int rc, len = nlmsg_total_size(sizeof(*ev));
2632 priv = iscsi_if_transport_lookup(session->transport);
2635 shost = iscsi_session_to_shost(session);
2637 skb = alloc_skb(len, GFP_KERNEL);
2639 iscsi_cls_session_printk(KERN_ERR, session,
2640 "Cannot notify userspace of session "
2641 "event %u\n", event);
2645 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2646 ev = nlmsg_data(nlh);
2647 ev->transport_handle = iscsi_handle(session->transport);
2651 case ISCSI_KEVENT_DESTROY_SESSION:
2652 ev->r.d_session.host_no = shost->host_no;
2653 ev->r.d_session.sid = session->sid;
2655 case ISCSI_KEVENT_CREATE_SESSION:
2656 ev->r.c_session_ret.host_no = shost->host_no;
2657 ev->r.c_session_ret.sid = session->sid;
2659 case ISCSI_KEVENT_UNBIND_SESSION:
2660 ev->r.unbind_session.host_no = shost->host_no;
2661 ev->r.unbind_session.sid = session->sid;
2664 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2671 * this will occur if the daemon is not up, so we just warn
2672 * the user and when the daemon is restarted it will handle it
2674 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2676 iscsi_cls_session_printk(KERN_ERR, session,
2677 "Cannot notify userspace of session "
2678 "event %u. Check iscsi daemon\n",
2681 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2685 EXPORT_SYMBOL_GPL(iscsi_session_event);
2688 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2689 struct iscsi_uevent *ev, pid_t pid,
2690 uint32_t initial_cmdsn, uint16_t cmds_max,
2691 uint16_t queue_depth)
2693 struct iscsi_transport *transport = priv->iscsi_transport;
2694 struct iscsi_cls_session *session;
2695 struct Scsi_Host *shost;
2697 session = transport->create_session(ep, cmds_max, queue_depth,
2702 session->creator = pid;
2703 shost = iscsi_session_to_shost(session);
2704 ev->r.c_session_ret.host_no = shost->host_no;
2705 ev->r.c_session_ret.sid = session->sid;
2706 ISCSI_DBG_TRANS_SESSION(session,
2707 "Completed creating transport session\n");
2712 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2714 struct iscsi_cls_conn *conn;
2715 struct iscsi_cls_session *session;
2717 session = iscsi_session_lookup(ev->u.c_conn.sid);
2719 printk(KERN_ERR "iscsi: invalid session %d.\n",
2724 conn = transport->create_conn(session, ev->u.c_conn.cid);
2726 iscsi_cls_session_printk(KERN_ERR, session,
2727 "couldn't create a new connection.");
2731 ev->r.c_conn_ret.sid = session->sid;
2732 ev->r.c_conn_ret.cid = conn->cid;
2734 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2739 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2741 struct iscsi_cls_conn *conn;
2743 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2747 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2748 if (transport->destroy_conn)
2749 transport->destroy_conn(conn);
2755 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2757 char *data = (char*)ev + sizeof(*ev);
2758 struct iscsi_cls_conn *conn;
2759 struct iscsi_cls_session *session;
2760 int err = 0, value = 0;
2762 if (ev->u.set_param.len > PAGE_SIZE)
2765 session = iscsi_session_lookup(ev->u.set_param.sid);
2766 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2767 if (!conn || !session)
2770 switch (ev->u.set_param.param) {
2771 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2772 sscanf(data, "%d", &value);
2773 if (!session->recovery_tmo_sysfs_override)
2774 session->recovery_tmo = value;
2777 err = transport->set_param(conn, ev->u.set_param.param,
2778 data, ev->u.set_param.len);
2784 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2785 struct iscsi_uevent *ev, int msg_type)
2787 struct iscsi_endpoint *ep;
2788 struct sockaddr *dst_addr;
2789 struct Scsi_Host *shost = NULL;
2790 int non_blocking, err = 0;
2792 if (!transport->ep_connect)
2795 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2796 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2798 printk(KERN_ERR "ep connect failed. Could not find "
2800 ev->u.ep_connect_through_host.host_no);
2803 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2805 non_blocking = ev->u.ep_connect.non_blocking;
2807 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2808 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2814 ev->r.ep_connect_ret.handle = ep->id;
2817 scsi_host_put(shost);
2821 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2824 struct iscsi_cls_conn *conn;
2825 struct iscsi_endpoint *ep;
2827 if (!transport->ep_disconnect)
2830 ep = iscsi_lookup_endpoint(ep_handle);
2835 mutex_lock(&conn->ep_mutex);
2837 mutex_unlock(&conn->ep_mutex);
2840 transport->ep_disconnect(ep);
2845 iscsi_if_transport_ep(struct iscsi_transport *transport,
2846 struct iscsi_uevent *ev, int msg_type)
2848 struct iscsi_endpoint *ep;
2852 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2853 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2854 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2856 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2857 if (!transport->ep_poll)
2860 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2864 ev->r.retcode = transport->ep_poll(ep,
2865 ev->u.ep_poll.timeout_ms);
2867 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2868 rc = iscsi_if_ep_disconnect(transport,
2869 ev->u.ep_disconnect.ep_handle);
2876 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2877 struct iscsi_uevent *ev)
2879 struct Scsi_Host *shost;
2880 struct sockaddr *dst_addr;
2883 if (!transport->tgt_dscvr)
2886 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2888 printk(KERN_ERR "target discovery could not find host no %u\n",
2889 ev->u.tgt_dscvr.host_no);
2894 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2895 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2896 ev->u.tgt_dscvr.enable, dst_addr);
2897 scsi_host_put(shost);
2902 iscsi_set_host_param(struct iscsi_transport *transport,
2903 struct iscsi_uevent *ev)
2905 char *data = (char*)ev + sizeof(*ev);
2906 struct Scsi_Host *shost;
2909 if (!transport->set_host_param)
2912 if (ev->u.set_host_param.len > PAGE_SIZE)
2915 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2917 printk(KERN_ERR "set_host_param could not find host no %u\n",
2918 ev->u.set_host_param.host_no);
2922 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2923 data, ev->u.set_host_param.len);
2924 scsi_host_put(shost);
2929 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2931 struct Scsi_Host *shost;
2932 struct iscsi_path *params;
2935 if (!transport->set_path)
2938 shost = scsi_host_lookup(ev->u.set_path.host_no);
2940 printk(KERN_ERR "set path could not find host no %u\n",
2941 ev->u.set_path.host_no);
2945 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2946 err = transport->set_path(shost, params);
2948 scsi_host_put(shost);
2952 static int iscsi_session_has_conns(int sid)
2954 struct iscsi_cls_conn *conn;
2955 unsigned long flags;
2958 spin_lock_irqsave(&connlock, flags);
2959 list_for_each_entry(conn, &connlist, conn_list) {
2960 if (iscsi_conn_get_sid(conn) == sid) {
2965 spin_unlock_irqrestore(&connlock, flags);
2971 iscsi_set_iface_params(struct iscsi_transport *transport,
2972 struct iscsi_uevent *ev, uint32_t len)
2974 char *data = (char *)ev + sizeof(*ev);
2975 struct Scsi_Host *shost;
2978 if (!transport->set_iface_param)
2981 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2983 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2984 ev->u.set_iface_params.host_no);
2988 err = transport->set_iface_param(shost, data, len);
2989 scsi_host_put(shost);
2994 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2996 struct Scsi_Host *shost;
2997 struct sockaddr *dst_addr;
3000 if (!transport->send_ping)
3003 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3005 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3006 ev->u.iscsi_ping.host_no);
3010 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3011 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3012 ev->u.iscsi_ping.iface_type,
3013 ev->u.iscsi_ping.payload_size,
3014 ev->u.iscsi_ping.pid,
3016 scsi_host_put(shost);
3021 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3023 struct iscsi_uevent *ev = nlmsg_data(nlh);
3024 struct Scsi_Host *shost = NULL;
3025 struct iscsi_chap_rec *chap_rec;
3026 struct iscsi_internal *priv;
3027 struct sk_buff *skbchap;
3028 struct nlmsghdr *nlhchap;
3029 struct iscsi_uevent *evchap;
3030 uint32_t chap_buf_size;
3034 if (!transport->get_chap)
3037 priv = iscsi_if_transport_lookup(transport);
3041 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3042 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3044 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3046 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3047 __func__, ev->u.get_chap.host_no);
3054 skbchap = alloc_skb(len, GFP_KERNEL);
3056 printk(KERN_ERR "can not deliver chap: OOM\n");
3061 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3062 (len - sizeof(*nlhchap)), 0);
3063 evchap = nlmsg_data(nlhchap);
3064 memset(evchap, 0, sizeof(*evchap));
3065 evchap->transport_handle = iscsi_handle(transport);
3066 evchap->type = nlh->nlmsg_type;
3067 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3068 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3069 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3070 buf = (char *)evchap + sizeof(*evchap);
3071 memset(buf, 0, chap_buf_size);
3073 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3074 &evchap->u.get_chap.num_entries, buf);
3076 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3077 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3078 nlhchap->nlmsg_len = actual_size;
3080 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3082 } while (err < 0 && err != -ECONNREFUSED);
3085 scsi_host_put(shost);
3089 static int iscsi_set_chap(struct iscsi_transport *transport,
3090 struct iscsi_uevent *ev, uint32_t len)
3092 char *data = (char *)ev + sizeof(*ev);
3093 struct Scsi_Host *shost;
3096 if (!transport->set_chap)
3099 shost = scsi_host_lookup(ev->u.set_path.host_no);
3101 pr_err("%s could not find host no %u\n",
3102 __func__, ev->u.set_path.host_no);
3106 err = transport->set_chap(shost, data, len);
3107 scsi_host_put(shost);
3111 static int iscsi_delete_chap(struct iscsi_transport *transport,
3112 struct iscsi_uevent *ev)
3114 struct Scsi_Host *shost;
3117 if (!transport->delete_chap)
3120 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3122 printk(KERN_ERR "%s could not find host no %u\n",
3123 __func__, ev->u.delete_chap.host_no);
3127 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3128 scsi_host_put(shost);
3132 static const struct {
3133 enum iscsi_discovery_parent_type value;
3135 } iscsi_discovery_parent_names[] = {
3136 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3137 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3138 {ISCSI_DISC_PARENT_ISNS, "isns" },
3141 char *iscsi_get_discovery_parent_name(int parent_type)
3144 char *state = "Unknown!";
3146 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3147 if (iscsi_discovery_parent_names[i].value & parent_type) {
3148 state = iscsi_discovery_parent_names[i].name;
3154 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3156 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3157 struct iscsi_uevent *ev, uint32_t len)
3159 char *data = (char *)ev + sizeof(*ev);
3160 struct Scsi_Host *shost;
3161 struct iscsi_bus_flash_session *fnode_sess;
3162 struct iscsi_bus_flash_conn *fnode_conn;
3167 if (!transport->set_flashnode_param) {
3169 goto exit_set_fnode;
3172 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3174 pr_err("%s could not find host no %u\n",
3175 __func__, ev->u.set_flashnode.host_no);
3177 goto exit_set_fnode;
3180 idx = ev->u.set_flashnode.flashnode_idx;
3181 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3183 pr_err("%s could not find flashnode %u for host no %u\n",
3184 __func__, idx, ev->u.set_flashnode.host_no);
3189 dev = iscsi_find_flashnode_conn(fnode_sess);
3195 fnode_conn = iscsi_dev_to_flash_conn(dev);
3196 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3200 put_device(&fnode_sess->dev);
3203 scsi_host_put(shost);
3209 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3210 struct iscsi_uevent *ev, uint32_t len)
3212 char *data = (char *)ev + sizeof(*ev);
3213 struct Scsi_Host *shost;
3217 if (!transport->new_flashnode) {
3219 goto exit_new_fnode;
3222 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3224 pr_err("%s could not find host no %u\n",
3225 __func__, ev->u.new_flashnode.host_no);
3230 index = transport->new_flashnode(shost, data, len);
3233 ev->r.new_flashnode_ret.flashnode_idx = index;
3238 scsi_host_put(shost);
3244 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3245 struct iscsi_uevent *ev)
3247 struct Scsi_Host *shost;
3248 struct iscsi_bus_flash_session *fnode_sess;
3252 if (!transport->del_flashnode) {
3254 goto exit_del_fnode;
3257 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3259 pr_err("%s could not find host no %u\n",
3260 __func__, ev->u.del_flashnode.host_no);
3265 idx = ev->u.del_flashnode.flashnode_idx;
3266 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3268 pr_err("%s could not find flashnode %u for host no %u\n",
3269 __func__, idx, ev->u.del_flashnode.host_no);
3274 err = transport->del_flashnode(fnode_sess);
3275 put_device(&fnode_sess->dev);
3278 scsi_host_put(shost);
3284 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3285 struct iscsi_uevent *ev)
3287 struct Scsi_Host *shost;
3288 struct iscsi_bus_flash_session *fnode_sess;
3289 struct iscsi_bus_flash_conn *fnode_conn;
3294 if (!transport->login_flashnode) {
3296 goto exit_login_fnode;
3299 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3301 pr_err("%s could not find host no %u\n",
3302 __func__, ev->u.login_flashnode.host_no);
3307 idx = ev->u.login_flashnode.flashnode_idx;
3308 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3310 pr_err("%s could not find flashnode %u for host no %u\n",
3311 __func__, idx, ev->u.login_flashnode.host_no);
3316 dev = iscsi_find_flashnode_conn(fnode_sess);
3322 fnode_conn = iscsi_dev_to_flash_conn(dev);
3323 err = transport->login_flashnode(fnode_sess, fnode_conn);
3327 put_device(&fnode_sess->dev);
3330 scsi_host_put(shost);
3336 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3337 struct iscsi_uevent *ev)
3339 struct Scsi_Host *shost;
3340 struct iscsi_bus_flash_session *fnode_sess;
3341 struct iscsi_bus_flash_conn *fnode_conn;
3346 if (!transport->logout_flashnode) {
3348 goto exit_logout_fnode;
3351 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3353 pr_err("%s could not find host no %u\n",
3354 __func__, ev->u.logout_flashnode.host_no);
3359 idx = ev->u.logout_flashnode.flashnode_idx;
3360 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3362 pr_err("%s could not find flashnode %u for host no %u\n",
3363 __func__, idx, ev->u.logout_flashnode.host_no);
3368 dev = iscsi_find_flashnode_conn(fnode_sess);
3374 fnode_conn = iscsi_dev_to_flash_conn(dev);
3376 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3380 put_device(&fnode_sess->dev);
3383 scsi_host_put(shost);
3389 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3390 struct iscsi_uevent *ev)
3392 struct Scsi_Host *shost;
3393 struct iscsi_cls_session *session;
3396 if (!transport->logout_flashnode_sid) {
3398 goto exit_logout_sid;
3401 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3403 pr_err("%s could not find host no %u\n",
3404 __func__, ev->u.logout_flashnode.host_no);
3409 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3411 pr_err("%s could not find session id %u\n",
3412 __func__, ev->u.logout_flashnode_sid.sid);
3417 err = transport->logout_flashnode_sid(session);
3420 scsi_host_put(shost);
3427 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3429 struct iscsi_uevent *ev = nlmsg_data(nlh);
3430 struct Scsi_Host *shost = NULL;
3431 struct iscsi_internal *priv;
3432 struct sk_buff *skbhost_stats;
3433 struct nlmsghdr *nlhhost_stats;
3434 struct iscsi_uevent *evhost_stats;
3435 int host_stats_size = 0;
3439 if (!transport->get_host_stats)
3442 priv = iscsi_if_transport_lookup(transport);
3446 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3447 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3449 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3451 pr_err("%s: failed. Could not find host no %u\n",
3452 __func__, ev->u.get_host_stats.host_no);
3459 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3460 if (!skbhost_stats) {
3461 pr_err("cannot deliver host stats: OOM\n");
3463 goto exit_host_stats;
3466 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3467 (len - sizeof(*nlhhost_stats)), 0);
3468 evhost_stats = nlmsg_data(nlhhost_stats);
3469 memset(evhost_stats, 0, sizeof(*evhost_stats));
3470 evhost_stats->transport_handle = iscsi_handle(transport);
3471 evhost_stats->type = nlh->nlmsg_type;
3472 evhost_stats->u.get_host_stats.host_no =
3473 ev->u.get_host_stats.host_no;
3474 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3475 memset(buf, 0, host_stats_size);
3477 err = transport->get_host_stats(shost, buf, host_stats_size);
3479 kfree_skb(skbhost_stats);
3480 goto exit_host_stats;
3483 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3484 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3485 nlhhost_stats->nlmsg_len = actual_size;
3487 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3489 } while (err < 0 && err != -ECONNREFUSED);
3492 scsi_host_put(shost);
3498 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3503 struct iscsi_uevent *ev = nlmsg_data(nlh);
3504 struct iscsi_transport *transport = NULL;
3505 struct iscsi_internal *priv;
3506 struct iscsi_cls_session *session;
3507 struct iscsi_cls_conn *conn;
3508 struct iscsi_endpoint *ep = NULL;
3510 if (!netlink_capable(skb, CAP_SYS_ADMIN))
3513 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3514 *group = ISCSI_NL_GRP_UIP;
3516 *group = ISCSI_NL_GRP_ISCSID;
3518 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3521 transport = priv->iscsi_transport;
3523 if (!try_module_get(transport->owner))
3526 portid = NETLINK_CB(skb).portid;
3528 switch (nlh->nlmsg_type) {
3529 case ISCSI_UEVENT_CREATE_SESSION:
3530 err = iscsi_if_create_session(priv, ep, ev,
3532 ev->u.c_session.initial_cmdsn,
3533 ev->u.c_session.cmds_max,
3534 ev->u.c_session.queue_depth);
3536 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3537 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3543 err = iscsi_if_create_session(priv, ep, ev,
3545 ev->u.c_bound_session.initial_cmdsn,
3546 ev->u.c_bound_session.cmds_max,
3547 ev->u.c_bound_session.queue_depth);
3549 case ISCSI_UEVENT_DESTROY_SESSION:
3550 session = iscsi_session_lookup(ev->u.d_session.sid);
3553 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3556 transport->destroy_session(session);
3558 case ISCSI_UEVENT_UNBIND_SESSION:
3559 session = iscsi_session_lookup(ev->u.d_session.sid);
3561 scsi_queue_work(iscsi_session_to_shost(session),
3562 &session->unbind_work);
3566 case ISCSI_UEVENT_CREATE_CONN:
3567 err = iscsi_if_create_conn(transport, ev);
3569 case ISCSI_UEVENT_DESTROY_CONN:
3570 err = iscsi_if_destroy_conn(transport, ev);
3572 case ISCSI_UEVENT_BIND_CONN:
3573 session = iscsi_session_lookup(ev->u.b_conn.sid);
3574 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3576 if (conn && conn->ep)
3577 iscsi_if_ep_disconnect(transport, conn->ep->id);
3579 if (!session || !conn) {
3584 ev->r.retcode = transport->bind_conn(session, conn,
3585 ev->u.b_conn.transport_eph,
3586 ev->u.b_conn.is_leading);
3587 if (ev->r.retcode || !transport->ep_connect)
3590 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3594 mutex_lock(&conn->ep_mutex);
3596 mutex_unlock(&conn->ep_mutex);
3598 iscsi_cls_conn_printk(KERN_ERR, conn,
3599 "Could not set ep conn "
3602 case ISCSI_UEVENT_SET_PARAM:
3603 err = iscsi_set_param(transport, ev);
3605 case ISCSI_UEVENT_START_CONN:
3606 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3608 ev->r.retcode = transport->start_conn(conn);
3612 case ISCSI_UEVENT_STOP_CONN:
3613 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3615 transport->stop_conn(conn, ev->u.stop_conn.flag);
3619 case ISCSI_UEVENT_SEND_PDU:
3620 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev);
3622 if ((ev->u.send_pdu.hdr_size > pdu_len) ||
3623 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {
3628 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3630 ev->r.retcode = transport->send_pdu(conn,
3631 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3632 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3633 ev->u.send_pdu.data_size);
3637 case ISCSI_UEVENT_GET_STATS:
3638 err = iscsi_if_get_stats(transport, nlh);
3640 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3641 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3642 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3643 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3644 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3646 case ISCSI_UEVENT_TGT_DSCVR:
3647 err = iscsi_tgt_dscvr(transport, ev);
3649 case ISCSI_UEVENT_SET_HOST_PARAM:
3650 err = iscsi_set_host_param(transport, ev);
3652 case ISCSI_UEVENT_PATH_UPDATE:
3653 err = iscsi_set_path(transport, ev);
3655 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3656 err = iscsi_set_iface_params(transport, ev,
3657 nlmsg_attrlen(nlh, sizeof(*ev)));
3659 case ISCSI_UEVENT_PING:
3660 err = iscsi_send_ping(transport, ev);
3662 case ISCSI_UEVENT_GET_CHAP:
3663 err = iscsi_get_chap(transport, nlh);
3665 case ISCSI_UEVENT_DELETE_CHAP:
3666 err = iscsi_delete_chap(transport, ev);
3668 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3669 err = iscsi_set_flashnode_param(transport, ev,
3673 case ISCSI_UEVENT_NEW_FLASHNODE:
3674 err = iscsi_new_flashnode(transport, ev,
3675 nlmsg_attrlen(nlh, sizeof(*ev)));
3677 case ISCSI_UEVENT_DEL_FLASHNODE:
3678 err = iscsi_del_flashnode(transport, ev);
3680 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3681 err = iscsi_login_flashnode(transport, ev);
3683 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3684 err = iscsi_logout_flashnode(transport, ev);
3686 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3687 err = iscsi_logout_flashnode_sid(transport, ev);
3689 case ISCSI_UEVENT_SET_CHAP:
3690 err = iscsi_set_chap(transport, ev,
3691 nlmsg_attrlen(nlh, sizeof(*ev)));
3693 case ISCSI_UEVENT_GET_HOST_STATS:
3694 err = iscsi_get_host_stats(transport, nlh);
3701 module_put(transport->owner);
3706 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3707 * Malformed skbs with wrong lengths or invalid creds are not processed.
3710 iscsi_if_rx(struct sk_buff *skb)
3712 u32 portid = NETLINK_CB(skb).portid;
3714 mutex_lock(&rx_queue_mutex);
3715 while (skb->len >= NLMSG_HDRLEN) {
3718 struct nlmsghdr *nlh;
3719 struct iscsi_uevent *ev;
3721 int retries = ISCSI_SEND_MAX_ALLOWED;
3723 nlh = nlmsg_hdr(skb);
3724 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3725 skb->len < nlh->nlmsg_len) {
3729 ev = nlmsg_data(nlh);
3730 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3731 if (rlen > skb->len)
3734 err = iscsi_if_recv_msg(skb, nlh, &group);
3736 ev->type = ISCSI_KEVENT_IF_ERROR;
3741 * special case for GET_STATS:
3742 * on success - sending reply and stats from
3743 * inside of if_recv_msg(),
3744 * on error - fall through.
3746 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3748 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3750 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3752 if (err == -EAGAIN && --retries < 0) {
3753 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3756 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3757 skb_pull(skb, rlen);
3759 mutex_unlock(&rx_queue_mutex);
3762 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3763 struct device_attribute dev_attr_##_prefix##_##_name = \
3764 __ATTR(_name,_mode,_show,_store)
3767 * iSCSI connection attrs
3769 #define iscsi_conn_attr_show(param) \
3771 show_conn_param_##param(struct device *dev, \
3772 struct device_attribute *attr, char *buf) \
3774 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3775 struct iscsi_transport *t = conn->transport; \
3776 return t->get_conn_param(conn, param, buf); \
3779 #define iscsi_conn_attr(field, param) \
3780 iscsi_conn_attr_show(param) \
3781 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3784 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3785 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3786 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3787 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3788 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3789 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3790 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3791 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3792 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3793 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3794 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3795 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3796 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3797 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3798 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3799 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3800 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3801 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3802 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3803 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3804 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3805 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3806 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3807 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3808 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3809 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3810 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3811 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3814 #define iscsi_conn_ep_attr_show(param) \
3815 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3816 struct device_attribute *attr,\
3819 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3820 struct iscsi_transport *t = conn->transport; \
3821 struct iscsi_endpoint *ep; \
3825 * Need to make sure ep_disconnect does not free the LLD's \
3826 * interconnect resources while we are trying to read them. \
3828 mutex_lock(&conn->ep_mutex); \
3830 if (!ep && t->ep_connect) { \
3831 mutex_unlock(&conn->ep_mutex); \
3836 rc = t->get_ep_param(ep, param, buf); \
3838 rc = t->get_conn_param(conn, param, buf); \
3839 mutex_unlock(&conn->ep_mutex); \
3843 #define iscsi_conn_ep_attr(field, param) \
3844 iscsi_conn_ep_attr_show(param) \
3845 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3846 show_conn_ep_param_##param, NULL);
3848 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3849 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3851 static struct attribute *iscsi_conn_attrs[] = {
3852 &dev_attr_conn_max_recv_dlength.attr,
3853 &dev_attr_conn_max_xmit_dlength.attr,
3854 &dev_attr_conn_header_digest.attr,
3855 &dev_attr_conn_data_digest.attr,
3856 &dev_attr_conn_ifmarker.attr,
3857 &dev_attr_conn_ofmarker.attr,
3858 &dev_attr_conn_address.attr,
3859 &dev_attr_conn_port.attr,
3860 &dev_attr_conn_exp_statsn.attr,
3861 &dev_attr_conn_persistent_address.attr,
3862 &dev_attr_conn_persistent_port.attr,
3863 &dev_attr_conn_ping_tmo.attr,
3864 &dev_attr_conn_recv_tmo.attr,
3865 &dev_attr_conn_local_port.attr,
3866 &dev_attr_conn_statsn.attr,
3867 &dev_attr_conn_keepalive_tmo.attr,
3868 &dev_attr_conn_max_segment_size.attr,
3869 &dev_attr_conn_tcp_timestamp_stat.attr,
3870 &dev_attr_conn_tcp_wsf_disable.attr,
3871 &dev_attr_conn_tcp_nagle_disable.attr,
3872 &dev_attr_conn_tcp_timer_scale.attr,
3873 &dev_attr_conn_tcp_timestamp_enable.attr,
3874 &dev_attr_conn_fragment_disable.attr,
3875 &dev_attr_conn_ipv4_tos.attr,
3876 &dev_attr_conn_ipv6_traffic_class.attr,
3877 &dev_attr_conn_ipv6_flow_label.attr,
3878 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3879 &dev_attr_conn_tcp_xmit_wsf.attr,
3880 &dev_attr_conn_tcp_recv_wsf.attr,
3881 &dev_attr_conn_local_ipaddr.attr,
3885 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3886 struct attribute *attr, int i)
3888 struct device *cdev = container_of(kobj, struct device, kobj);
3889 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3890 struct iscsi_transport *t = conn->transport;
3893 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3894 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3895 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3896 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3897 else if (attr == &dev_attr_conn_header_digest.attr)
3898 param = ISCSI_PARAM_HDRDGST_EN;
3899 else if (attr == &dev_attr_conn_data_digest.attr)
3900 param = ISCSI_PARAM_DATADGST_EN;
3901 else if (attr == &dev_attr_conn_ifmarker.attr)
3902 param = ISCSI_PARAM_IFMARKER_EN;
3903 else if (attr == &dev_attr_conn_ofmarker.attr)
3904 param = ISCSI_PARAM_OFMARKER_EN;
3905 else if (attr == &dev_attr_conn_address.attr)
3906 param = ISCSI_PARAM_CONN_ADDRESS;
3907 else if (attr == &dev_attr_conn_port.attr)
3908 param = ISCSI_PARAM_CONN_PORT;
3909 else if (attr == &dev_attr_conn_exp_statsn.attr)
3910 param = ISCSI_PARAM_EXP_STATSN;
3911 else if (attr == &dev_attr_conn_persistent_address.attr)
3912 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3913 else if (attr == &dev_attr_conn_persistent_port.attr)
3914 param = ISCSI_PARAM_PERSISTENT_PORT;
3915 else if (attr == &dev_attr_conn_ping_tmo.attr)
3916 param = ISCSI_PARAM_PING_TMO;
3917 else if (attr == &dev_attr_conn_recv_tmo.attr)
3918 param = ISCSI_PARAM_RECV_TMO;
3919 else if (attr == &dev_attr_conn_local_port.attr)
3920 param = ISCSI_PARAM_LOCAL_PORT;
3921 else if (attr == &dev_attr_conn_statsn.attr)
3922 param = ISCSI_PARAM_STATSN;
3923 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3924 param = ISCSI_PARAM_KEEPALIVE_TMO;
3925 else if (attr == &dev_attr_conn_max_segment_size.attr)
3926 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3927 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3928 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3929 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3930 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3931 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3932 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3933 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3934 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3935 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3936 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3937 else if (attr == &dev_attr_conn_fragment_disable.attr)
3938 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3939 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3940 param = ISCSI_PARAM_IPV4_TOS;
3941 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3942 param = ISCSI_PARAM_IPV6_TC;
3943 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3944 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3945 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3946 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3947 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3948 param = ISCSI_PARAM_TCP_XMIT_WSF;
3949 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3950 param = ISCSI_PARAM_TCP_RECV_WSF;
3951 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3952 param = ISCSI_PARAM_LOCAL_IPADDR;
3954 WARN_ONCE(1, "Invalid conn attr");
3958 return t->attr_is_visible(ISCSI_PARAM, param);
3961 static struct attribute_group iscsi_conn_group = {
3962 .attrs = iscsi_conn_attrs,
3963 .is_visible = iscsi_conn_attr_is_visible,
3967 * iSCSI session attrs
3969 #define iscsi_session_attr_show(param, perm) \
3971 show_session_param_##param(struct device *dev, \
3972 struct device_attribute *attr, char *buf) \
3974 struct iscsi_cls_session *session = \
3975 iscsi_dev_to_session(dev->parent); \
3976 struct iscsi_transport *t = session->transport; \
3978 if (perm && !capable(CAP_SYS_ADMIN)) \
3980 return t->get_session_param(session, param, buf); \
3983 #define iscsi_session_attr(field, param, perm) \
3984 iscsi_session_attr_show(param, perm) \
3985 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3987 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3988 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3989 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3990 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3991 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3992 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3993 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3994 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3995 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3996 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3997 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3998 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3999 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4000 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4001 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4002 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4003 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4004 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4005 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4006 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4007 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4008 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4009 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4010 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4011 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4012 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4013 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4014 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4015 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4016 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4017 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4018 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4019 iscsi_session_attr(discovery_auth_optional,
4020 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4021 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4022 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4023 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4024 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4025 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4026 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4027 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4030 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4033 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4034 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));
4036 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4039 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4042 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4043 return sysfs_emit(buf, "%d\n", session->creator);
4045 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4048 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4051 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4052 return sysfs_emit(buf, "%d\n", session->target_id);
4054 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4055 show_priv_session_target_id, NULL);
4057 #define iscsi_priv_session_attr_show(field, format) \
4059 show_priv_session_##field(struct device *dev, \
4060 struct device_attribute *attr, char *buf) \
4062 struct iscsi_cls_session *session = \
4063 iscsi_dev_to_session(dev->parent); \
4064 if (session->field == -1) \
4065 return sysfs_emit(buf, "off\n"); \
4066 return sysfs_emit(buf, format"\n", session->field); \
4069 #define iscsi_priv_session_attr_store(field) \
4071 store_priv_session_##field(struct device *dev, \
4072 struct device_attribute *attr, \
4073 const char *buf, size_t count) \
4077 struct iscsi_cls_session *session = \
4078 iscsi_dev_to_session(dev->parent); \
4079 if ((session->state == ISCSI_SESSION_FREE) || \
4080 (session->state == ISCSI_SESSION_FAILED)) \
4082 if (strncmp(buf, "off", 3) == 0) { \
4083 session->field = -1; \
4084 session->field##_sysfs_override = true; \
4086 val = simple_strtoul(buf, &cp, 0); \
4087 if (*cp != '\0' && *cp != '\n') \
4089 session->field = val; \
4090 session->field##_sysfs_override = true; \
4095 #define iscsi_priv_session_rw_attr(field, format) \
4096 iscsi_priv_session_attr_show(field, format) \
4097 iscsi_priv_session_attr_store(field) \
4098 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4099 show_priv_session_##field, \
4100 store_priv_session_##field)
4102 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4104 static struct attribute *iscsi_session_attrs[] = {
4105 &dev_attr_sess_initial_r2t.attr,
4106 &dev_attr_sess_max_outstanding_r2t.attr,
4107 &dev_attr_sess_immediate_data.attr,
4108 &dev_attr_sess_first_burst_len.attr,
4109 &dev_attr_sess_max_burst_len.attr,
4110 &dev_attr_sess_data_pdu_in_order.attr,
4111 &dev_attr_sess_data_seq_in_order.attr,
4112 &dev_attr_sess_erl.attr,
4113 &dev_attr_sess_targetname.attr,
4114 &dev_attr_sess_tpgt.attr,
4115 &dev_attr_sess_password.attr,
4116 &dev_attr_sess_password_in.attr,
4117 &dev_attr_sess_username.attr,
4118 &dev_attr_sess_username_in.attr,
4119 &dev_attr_sess_fast_abort.attr,
4120 &dev_attr_sess_abort_tmo.attr,
4121 &dev_attr_sess_lu_reset_tmo.attr,
4122 &dev_attr_sess_tgt_reset_tmo.attr,
4123 &dev_attr_sess_ifacename.attr,
4124 &dev_attr_sess_initiatorname.attr,
4125 &dev_attr_sess_targetalias.attr,
4126 &dev_attr_sess_boot_root.attr,
4127 &dev_attr_sess_boot_nic.attr,
4128 &dev_attr_sess_boot_target.attr,
4129 &dev_attr_priv_sess_recovery_tmo.attr,
4130 &dev_attr_priv_sess_state.attr,
4131 &dev_attr_priv_sess_creator.attr,
4132 &dev_attr_sess_chap_out_idx.attr,
4133 &dev_attr_sess_chap_in_idx.attr,
4134 &dev_attr_priv_sess_target_id.attr,
4135 &dev_attr_sess_auto_snd_tgt_disable.attr,
4136 &dev_attr_sess_discovery_session.attr,
4137 &dev_attr_sess_portal_type.attr,
4138 &dev_attr_sess_chap_auth.attr,
4139 &dev_attr_sess_discovery_logout.attr,
4140 &dev_attr_sess_bidi_chap.attr,
4141 &dev_attr_sess_discovery_auth_optional.attr,
4142 &dev_attr_sess_def_time2wait.attr,
4143 &dev_attr_sess_def_time2retain.attr,
4144 &dev_attr_sess_isid.attr,
4145 &dev_attr_sess_tsid.attr,
4146 &dev_attr_sess_def_taskmgmt_tmo.attr,
4147 &dev_attr_sess_discovery_parent_idx.attr,
4148 &dev_attr_sess_discovery_parent_type.attr,
4152 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4153 struct attribute *attr, int i)
4155 struct device *cdev = container_of(kobj, struct device, kobj);
4156 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4157 struct iscsi_transport *t = session->transport;
4160 if (attr == &dev_attr_sess_initial_r2t.attr)
4161 param = ISCSI_PARAM_INITIAL_R2T_EN;
4162 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4163 param = ISCSI_PARAM_MAX_R2T;
4164 else if (attr == &dev_attr_sess_immediate_data.attr)
4165 param = ISCSI_PARAM_IMM_DATA_EN;
4166 else if (attr == &dev_attr_sess_first_burst_len.attr)
4167 param = ISCSI_PARAM_FIRST_BURST;
4168 else if (attr == &dev_attr_sess_max_burst_len.attr)
4169 param = ISCSI_PARAM_MAX_BURST;
4170 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4171 param = ISCSI_PARAM_PDU_INORDER_EN;
4172 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4173 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4174 else if (attr == &dev_attr_sess_erl.attr)
4175 param = ISCSI_PARAM_ERL;
4176 else if (attr == &dev_attr_sess_targetname.attr)
4177 param = ISCSI_PARAM_TARGET_NAME;
4178 else if (attr == &dev_attr_sess_tpgt.attr)
4179 param = ISCSI_PARAM_TPGT;
4180 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4181 param = ISCSI_PARAM_CHAP_IN_IDX;
4182 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4183 param = ISCSI_PARAM_CHAP_OUT_IDX;
4184 else if (attr == &dev_attr_sess_password.attr)
4185 param = ISCSI_PARAM_USERNAME;
4186 else if (attr == &dev_attr_sess_password_in.attr)
4187 param = ISCSI_PARAM_USERNAME_IN;
4188 else if (attr == &dev_attr_sess_username.attr)
4189 param = ISCSI_PARAM_PASSWORD;
4190 else if (attr == &dev_attr_sess_username_in.attr)
4191 param = ISCSI_PARAM_PASSWORD_IN;
4192 else if (attr == &dev_attr_sess_fast_abort.attr)
4193 param = ISCSI_PARAM_FAST_ABORT;
4194 else if (attr == &dev_attr_sess_abort_tmo.attr)
4195 param = ISCSI_PARAM_ABORT_TMO;
4196 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4197 param = ISCSI_PARAM_LU_RESET_TMO;
4198 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4199 param = ISCSI_PARAM_TGT_RESET_TMO;
4200 else if (attr == &dev_attr_sess_ifacename.attr)
4201 param = ISCSI_PARAM_IFACE_NAME;
4202 else if (attr == &dev_attr_sess_initiatorname.attr)
4203 param = ISCSI_PARAM_INITIATOR_NAME;
4204 else if (attr == &dev_attr_sess_targetalias.attr)
4205 param = ISCSI_PARAM_TARGET_ALIAS;
4206 else if (attr == &dev_attr_sess_boot_root.attr)
4207 param = ISCSI_PARAM_BOOT_ROOT;
4208 else if (attr == &dev_attr_sess_boot_nic.attr)
4209 param = ISCSI_PARAM_BOOT_NIC;
4210 else if (attr == &dev_attr_sess_boot_target.attr)
4211 param = ISCSI_PARAM_BOOT_TARGET;
4212 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4213 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4214 else if (attr == &dev_attr_sess_discovery_session.attr)
4215 param = ISCSI_PARAM_DISCOVERY_SESS;
4216 else if (attr == &dev_attr_sess_portal_type.attr)
4217 param = ISCSI_PARAM_PORTAL_TYPE;
4218 else if (attr == &dev_attr_sess_chap_auth.attr)
4219 param = ISCSI_PARAM_CHAP_AUTH_EN;
4220 else if (attr == &dev_attr_sess_discovery_logout.attr)
4221 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4222 else if (attr == &dev_attr_sess_bidi_chap.attr)
4223 param = ISCSI_PARAM_BIDI_CHAP_EN;
4224 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4225 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4226 else if (attr == &dev_attr_sess_def_time2wait.attr)
4227 param = ISCSI_PARAM_DEF_TIME2WAIT;
4228 else if (attr == &dev_attr_sess_def_time2retain.attr)
4229 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4230 else if (attr == &dev_attr_sess_isid.attr)
4231 param = ISCSI_PARAM_ISID;
4232 else if (attr == &dev_attr_sess_tsid.attr)
4233 param = ISCSI_PARAM_TSID;
4234 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4235 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4236 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4237 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4238 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4239 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4240 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4241 return S_IRUGO | S_IWUSR;
4242 else if (attr == &dev_attr_priv_sess_state.attr)
4244 else if (attr == &dev_attr_priv_sess_creator.attr)
4246 else if (attr == &dev_attr_priv_sess_target_id.attr)
4249 WARN_ONCE(1, "Invalid session attr");
4253 return t->attr_is_visible(ISCSI_PARAM, param);
4256 static struct attribute_group iscsi_session_group = {
4257 .attrs = iscsi_session_attrs,
4258 .is_visible = iscsi_session_attr_is_visible,
4264 #define iscsi_host_attr_show(param) \
4266 show_host_param_##param(struct device *dev, \
4267 struct device_attribute *attr, char *buf) \
4269 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4270 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4271 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4274 #define iscsi_host_attr(field, param) \
4275 iscsi_host_attr_show(param) \
4276 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4279 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4280 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4281 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4282 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4283 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4284 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4286 static struct attribute *iscsi_host_attrs[] = {
4287 &dev_attr_host_netdev.attr,
4288 &dev_attr_host_hwaddress.attr,
4289 &dev_attr_host_ipaddress.attr,
4290 &dev_attr_host_initiatorname.attr,
4291 &dev_attr_host_port_state.attr,
4292 &dev_attr_host_port_speed.attr,
4296 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4297 struct attribute *attr, int i)
4299 struct device *cdev = container_of(kobj, struct device, kobj);
4300 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4301 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4304 if (attr == &dev_attr_host_netdev.attr)
4305 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4306 else if (attr == &dev_attr_host_hwaddress.attr)
4307 param = ISCSI_HOST_PARAM_HWADDRESS;
4308 else if (attr == &dev_attr_host_ipaddress.attr)
4309 param = ISCSI_HOST_PARAM_IPADDRESS;
4310 else if (attr == &dev_attr_host_initiatorname.attr)
4311 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4312 else if (attr == &dev_attr_host_port_state.attr)
4313 param = ISCSI_HOST_PARAM_PORT_STATE;
4314 else if (attr == &dev_attr_host_port_speed.attr)
4315 param = ISCSI_HOST_PARAM_PORT_SPEED;
4317 WARN_ONCE(1, "Invalid host attr");
4321 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4324 static struct attribute_group iscsi_host_group = {
4325 .attrs = iscsi_host_attrs,
4326 .is_visible = iscsi_host_attr_is_visible,
4329 /* convert iscsi_port_speed values to ascii string name */
4330 static const struct {
4331 enum iscsi_port_speed value;
4333 } iscsi_port_speed_names[] = {
4334 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4335 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4336 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4337 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4338 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4339 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4340 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4343 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4346 char *speed = "Unknown!";
4347 struct iscsi_cls_host *ihost = shost->shost_data;
4348 uint32_t port_speed = ihost->port_speed;
4350 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4351 if (iscsi_port_speed_names[i].value & port_speed) {
4352 speed = iscsi_port_speed_names[i].name;
4358 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4360 /* convert iscsi_port_state values to ascii string name */
4361 static const struct {
4362 enum iscsi_port_state value;
4364 } iscsi_port_state_names[] = {
4365 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4366 {ISCSI_PORT_STATE_UP, "LINK UP" },
4369 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4372 char *state = "Unknown!";
4373 struct iscsi_cls_host *ihost = shost->shost_data;
4374 uint32_t port_state = ihost->port_state;
4376 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4377 if (iscsi_port_state_names[i].value & port_state) {
4378 state = iscsi_port_state_names[i].name;
4384 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4386 static int iscsi_session_match(struct attribute_container *cont,
4389 struct iscsi_cls_session *session;
4390 struct Scsi_Host *shost;
4391 struct iscsi_internal *priv;
4393 if (!iscsi_is_session_dev(dev))
4396 session = iscsi_dev_to_session(dev);
4397 shost = iscsi_session_to_shost(session);
4398 if (!shost->transportt)
4401 priv = to_iscsi_internal(shost->transportt);
4402 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4405 return &priv->session_cont.ac == cont;
4408 static int iscsi_conn_match(struct attribute_container *cont,
4411 struct iscsi_cls_session *session;
4412 struct iscsi_cls_conn *conn;
4413 struct Scsi_Host *shost;
4414 struct iscsi_internal *priv;
4416 if (!iscsi_is_conn_dev(dev))
4419 conn = iscsi_dev_to_conn(dev);
4420 session = iscsi_dev_to_session(conn->dev.parent);
4421 shost = iscsi_session_to_shost(session);
4423 if (!shost->transportt)
4426 priv = to_iscsi_internal(shost->transportt);
4427 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4430 return &priv->conn_cont.ac == cont;
4433 static int iscsi_host_match(struct attribute_container *cont,
4436 struct Scsi_Host *shost;
4437 struct iscsi_internal *priv;
4439 if (!scsi_is_host_device(dev))
4442 shost = dev_to_shost(dev);
4443 if (!shost->transportt ||
4444 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4447 priv = to_iscsi_internal(shost->transportt);
4448 return &priv->t.host_attrs.ac == cont;
4451 struct scsi_transport_template *
4452 iscsi_register_transport(struct iscsi_transport *tt)
4454 struct iscsi_internal *priv;
4455 unsigned long flags;
4460 priv = iscsi_if_transport_lookup(tt);
4464 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4467 INIT_LIST_HEAD(&priv->list);
4468 priv->iscsi_transport = tt;
4469 priv->t.user_scan = iscsi_user_scan;
4470 priv->t.create_work_queue = 1;
4472 priv->dev.class = &iscsi_transport_class;
4473 dev_set_name(&priv->dev, "%s", tt->name);
4474 err = device_register(&priv->dev);
4478 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4480 goto unregister_dev;
4482 /* host parameters */
4483 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4484 priv->t.host_attrs.ac.match = iscsi_host_match;
4485 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4486 priv->t.host_size = sizeof(struct iscsi_cls_host);
4487 transport_container_register(&priv->t.host_attrs);
4489 /* connection parameters */
4490 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4491 priv->conn_cont.ac.match = iscsi_conn_match;
4492 priv->conn_cont.ac.grp = &iscsi_conn_group;
4493 transport_container_register(&priv->conn_cont);
4495 /* session parameters */
4496 priv->session_cont.ac.class = &iscsi_session_class.class;
4497 priv->session_cont.ac.match = iscsi_session_match;
4498 priv->session_cont.ac.grp = &iscsi_session_group;
4499 transport_container_register(&priv->session_cont);
4501 spin_lock_irqsave(&iscsi_transport_lock, flags);
4502 list_add(&priv->list, &iscsi_transports);
4503 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4505 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4509 device_unregister(&priv->dev);
4515 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4517 int iscsi_unregister_transport(struct iscsi_transport *tt)
4519 struct iscsi_internal *priv;
4520 unsigned long flags;
4524 mutex_lock(&rx_queue_mutex);
4526 priv = iscsi_if_transport_lookup(tt);
4529 spin_lock_irqsave(&iscsi_transport_lock, flags);
4530 list_del(&priv->list);
4531 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4533 transport_container_unregister(&priv->conn_cont);
4534 transport_container_unregister(&priv->session_cont);
4535 transport_container_unregister(&priv->t.host_attrs);
4537 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4538 device_unregister(&priv->dev);
4539 mutex_unlock(&rx_queue_mutex);
4543 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4545 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4546 struct device *dev, const char *fmt, ...)
4548 struct va_format vaf;
4551 va_start(args, fmt);
4557 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4559 static __init int iscsi_transport_init(void)
4562 struct netlink_kernel_cfg cfg = {
4564 .input = iscsi_if_rx,
4566 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4567 ISCSI_TRANSPORT_VERSION);
4569 atomic_set(&iscsi_session_nr, 0);
4571 err = class_register(&iscsi_transport_class);
4575 err = class_register(&iscsi_endpoint_class);
4577 goto unregister_transport_class;
4579 err = class_register(&iscsi_iface_class);
4581 goto unregister_endpoint_class;
4583 err = transport_class_register(&iscsi_host_class);
4585 goto unregister_iface_class;
4587 err = transport_class_register(&iscsi_connection_class);
4589 goto unregister_host_class;
4591 err = transport_class_register(&iscsi_session_class);
4593 goto unregister_conn_class;
4595 err = bus_register(&iscsi_flashnode_bus);
4597 goto unregister_session_class;
4599 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4602 goto unregister_flashnode_bus;
4605 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4606 if (!iscsi_eh_timer_workq) {
4614 netlink_kernel_release(nls);
4615 unregister_flashnode_bus:
4616 bus_unregister(&iscsi_flashnode_bus);
4617 unregister_session_class:
4618 transport_class_unregister(&iscsi_session_class);
4619 unregister_conn_class:
4620 transport_class_unregister(&iscsi_connection_class);
4621 unregister_host_class:
4622 transport_class_unregister(&iscsi_host_class);
4623 unregister_iface_class:
4624 class_unregister(&iscsi_iface_class);
4625 unregister_endpoint_class:
4626 class_unregister(&iscsi_endpoint_class);
4627 unregister_transport_class:
4628 class_unregister(&iscsi_transport_class);
4632 static void __exit iscsi_transport_exit(void)
4634 destroy_workqueue(iscsi_eh_timer_workq);
4635 netlink_kernel_release(nls);
4636 bus_unregister(&iscsi_flashnode_bus);
4637 transport_class_unregister(&iscsi_connection_class);
4638 transport_class_unregister(&iscsi_session_class);
4639 transport_class_unregister(&iscsi_host_class);
4640 class_unregister(&iscsi_endpoint_class);
4641 class_unregister(&iscsi_iface_class);
4642 class_unregister(&iscsi_transport_class);
4645 module_init(iscsi_transport_init);
4646 module_exit(iscsi_transport_exit);
4648 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4649 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4650 "Alex Aizman <itn780@yahoo.com>");
4651 MODULE_DESCRIPTION("iSCSI Transport Interface");
4652 MODULE_LICENSE("GPL");
4653 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4654 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);