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 /* Worker to perform connection failure on unresponsive connections
90 * completely in kernel space.
92 static void stop_conn_work_fn(struct work_struct *work);
93 static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);
95 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
96 static struct workqueue_struct *iscsi_eh_timer_workq;
98 static struct workqueue_struct *iscsi_destroy_workq;
100 static DEFINE_IDA(iscsi_sess_ida);
102 * list of registered transports and lock that must
103 * be held while accessing list. The iscsi_transport_lock must
104 * be acquired after the rx_queue_mutex.
106 static LIST_HEAD(iscsi_transports);
107 static DEFINE_SPINLOCK(iscsi_transport_lock);
109 #define to_iscsi_internal(tmpl) \
110 container_of(tmpl, struct iscsi_internal, t)
112 #define dev_to_iscsi_internal(_dev) \
113 container_of(_dev, struct iscsi_internal, dev)
115 static void iscsi_transport_release(struct device *dev)
117 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
122 * iscsi_transport_class represents the iscsi_transports that are
125 static struct class iscsi_transport_class = {
126 .name = "iscsi_transport",
127 .dev_release = iscsi_transport_release,
131 show_transport_handle(struct device *dev, struct device_attribute *attr,
134 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
135 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
137 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
139 #define show_transport_attr(name, format) \
141 show_transport_##name(struct device *dev, \
142 struct device_attribute *attr,char *buf) \
144 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
145 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
147 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
149 show_transport_attr(caps, "0x%x");
151 static struct attribute *iscsi_transport_attrs[] = {
152 &dev_attr_handle.attr,
157 static struct attribute_group iscsi_transport_group = {
158 .attrs = iscsi_transport_attrs,
162 * iSCSI endpoint attrs
164 #define iscsi_dev_to_endpoint(_dev) \
165 container_of(_dev, struct iscsi_endpoint, dev)
167 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
168 struct device_attribute dev_attr_##_prefix##_##_name = \
169 __ATTR(_name,_mode,_show,_store)
171 static void iscsi_endpoint_release(struct device *dev)
173 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
177 static struct class iscsi_endpoint_class = {
178 .name = "iscsi_endpoint",
179 .dev_release = iscsi_endpoint_release,
183 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
185 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
186 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
188 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
190 static struct attribute *iscsi_endpoint_attrs[] = {
191 &dev_attr_ep_handle.attr,
195 static struct attribute_group iscsi_endpoint_group = {
196 .attrs = iscsi_endpoint_attrs,
199 #define ISCSI_MAX_EPID -1
201 static int iscsi_match_epid(struct device *dev, const void *data)
203 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
204 const uint64_t *epid = data;
206 return *epid == ep->id;
209 struct iscsi_endpoint *
210 iscsi_create_endpoint(int dd_size)
213 struct iscsi_endpoint *ep;
217 for (id = 1; id < ISCSI_MAX_EPID; id++) {
218 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
225 if (id == ISCSI_MAX_EPID) {
226 printk(KERN_ERR "Too many connections. Max supported %u\n",
231 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
236 ep->dev.class = &iscsi_endpoint_class;
237 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
238 err = device_register(&ep->dev);
242 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
247 ep->dd_data = &ep[1];
251 device_unregister(&ep->dev);
258 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
260 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
263 device_unregister(&ep->dev);
265 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
267 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
269 struct iscsi_endpoint *ep;
272 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
277 ep = iscsi_dev_to_endpoint(dev);
279 * we can drop this now because the interface will prevent
280 * removals and lookups from racing.
285 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
288 * Interface to display network param to sysfs
291 static void iscsi_iface_release(struct device *dev)
293 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
294 struct device *parent = iface->dev.parent;
301 static struct class iscsi_iface_class = {
302 .name = "iscsi_iface",
303 .dev_release = iscsi_iface_release,
306 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
307 struct device_attribute dev_attr_##_prefix##_##_name = \
308 __ATTR(_name, _mode, _show, _store)
310 /* iface attrs show */
311 #define iscsi_iface_attr_show(type, name, param_type, param) \
313 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
316 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
317 struct iscsi_transport *t = iface->transport; \
318 return t->get_iface_param(iface, param_type, param, buf); \
321 #define iscsi_iface_net_attr(type, name, param) \
322 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
323 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
325 #define iscsi_iface_attr(type, name, param) \
326 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
327 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
329 /* generic read only ipv4 attribute */
330 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
331 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
332 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
333 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
334 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
335 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
336 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
337 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
338 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
339 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
340 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
341 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
342 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
343 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
344 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
345 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
346 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
347 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
348 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
349 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
350 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
351 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
352 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
353 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
354 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
355 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
356 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
357 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
358 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
360 /* generic read only ipv6 attribute */
361 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
362 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
363 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
364 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
365 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
366 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
367 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
368 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
369 iscsi_iface_net_attr(ipv6_iface, link_local_state,
370 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
371 iscsi_iface_net_attr(ipv6_iface, router_state,
372 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
373 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
374 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
375 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
376 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
377 iscsi_iface_net_attr(ipv6_iface, traffic_class,
378 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
379 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
380 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
381 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
382 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
383 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
384 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
385 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
386 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
387 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
388 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
389 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
391 /* common read only iface attribute */
392 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
393 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
394 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
395 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
396 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
397 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
398 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
399 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
400 iscsi_iface_net_attr(iface, tcp_nagle_disable,
401 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
402 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
403 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
404 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
405 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
406 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
407 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
409 /* common iscsi specific settings attributes */
410 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
411 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
412 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
413 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
414 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
415 iscsi_iface_attr(iface, data_seq_in_order,
416 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
417 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
418 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
419 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
420 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
421 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
422 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
423 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
424 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
425 iscsi_iface_attr(iface, discovery_auth_optional,
426 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
427 iscsi_iface_attr(iface, discovery_logout,
428 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
429 iscsi_iface_attr(iface, strict_login_comp_en,
430 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
431 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
433 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
434 struct attribute *attr, int i)
436 struct device *dev = container_of(kobj, struct device, kobj);
437 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
438 struct iscsi_transport *t = iface->transport;
442 if (attr == &dev_attr_iface_enabled.attr)
443 param = ISCSI_NET_PARAM_IFACE_ENABLE;
444 else if (attr == &dev_attr_iface_vlan_id.attr)
445 param = ISCSI_NET_PARAM_VLAN_ID;
446 else if (attr == &dev_attr_iface_vlan_priority.attr)
447 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
448 else if (attr == &dev_attr_iface_vlan_enabled.attr)
449 param = ISCSI_NET_PARAM_VLAN_ENABLED;
450 else if (attr == &dev_attr_iface_mtu.attr)
451 param = ISCSI_NET_PARAM_MTU;
452 else if (attr == &dev_attr_iface_port.attr)
453 param = ISCSI_NET_PARAM_PORT;
454 else if (attr == &dev_attr_iface_ipaddress_state.attr)
455 param = ISCSI_NET_PARAM_IPADDR_STATE;
456 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
457 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
458 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
459 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
460 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
461 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
462 else if (attr == &dev_attr_iface_tcp_wsf.attr)
463 param = ISCSI_NET_PARAM_TCP_WSF;
464 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
465 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
466 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
467 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
468 else if (attr == &dev_attr_iface_cache_id.attr)
469 param = ISCSI_NET_PARAM_CACHE_ID;
470 else if (attr == &dev_attr_iface_redirect_en.attr)
471 param = ISCSI_NET_PARAM_REDIRECT_EN;
472 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
473 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
474 else if (attr == &dev_attr_iface_header_digest.attr)
475 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
476 else if (attr == &dev_attr_iface_data_digest.attr)
477 param = ISCSI_IFACE_PARAM_DATADGST_EN;
478 else if (attr == &dev_attr_iface_immediate_data.attr)
479 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
480 else if (attr == &dev_attr_iface_initial_r2t.attr)
481 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
482 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
483 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
484 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
485 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
486 else if (attr == &dev_attr_iface_erl.attr)
487 param = ISCSI_IFACE_PARAM_ERL;
488 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
489 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
490 else if (attr == &dev_attr_iface_first_burst_len.attr)
491 param = ISCSI_IFACE_PARAM_FIRST_BURST;
492 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
493 param = ISCSI_IFACE_PARAM_MAX_R2T;
494 else if (attr == &dev_attr_iface_max_burst_len.attr)
495 param = ISCSI_IFACE_PARAM_MAX_BURST;
496 else if (attr == &dev_attr_iface_chap_auth.attr)
497 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
498 else if (attr == &dev_attr_iface_bidi_chap.attr)
499 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
500 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
501 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
502 else if (attr == &dev_attr_iface_discovery_logout.attr)
503 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
504 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
505 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
506 else if (attr == &dev_attr_iface_initiator_name.attr)
507 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
508 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
509 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
510 param = ISCSI_NET_PARAM_IPV4_ADDR;
511 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
512 param = ISCSI_NET_PARAM_IPV4_GW;
513 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
514 param = ISCSI_NET_PARAM_IPV4_SUBNET;
515 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
516 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
518 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
519 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
521 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
522 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
523 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
524 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
525 else if (attr == &dev_attr_ipv4_iface_tos.attr)
526 param = ISCSI_NET_PARAM_IPV4_TOS;
527 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
528 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
530 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
531 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
532 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
533 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
535 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
536 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
538 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
539 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
540 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
541 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
543 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
544 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
546 &dev_attr_ipv4_iface_fragment_disable.attr)
547 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
549 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
550 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
551 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
552 param = ISCSI_NET_PARAM_IPV4_TTL;
555 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
556 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
557 param = ISCSI_NET_PARAM_IPV6_ADDR;
558 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
559 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
560 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
561 param = ISCSI_NET_PARAM_IPV6_ROUTER;
562 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
563 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
564 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
565 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
566 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
567 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
568 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
569 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
571 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
572 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
573 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
574 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
575 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
576 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
577 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
578 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
579 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
580 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
581 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
582 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
583 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
584 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
585 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
586 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
587 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
588 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
589 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
590 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
594 WARN_ONCE(1, "Invalid iface attr");
599 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
600 case ISCSI_IFACE_PARAM_HDRDGST_EN:
601 case ISCSI_IFACE_PARAM_DATADGST_EN:
602 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
603 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
604 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
605 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
606 case ISCSI_IFACE_PARAM_ERL:
607 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
608 case ISCSI_IFACE_PARAM_FIRST_BURST:
609 case ISCSI_IFACE_PARAM_MAX_R2T:
610 case ISCSI_IFACE_PARAM_MAX_BURST:
611 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
612 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
613 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
614 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
615 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
616 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
617 param_type = ISCSI_IFACE_PARAM;
620 param_type = ISCSI_NET_PARAM;
623 return t->attr_is_visible(param_type, param);
626 static struct attribute *iscsi_iface_attrs[] = {
627 &dev_attr_iface_enabled.attr,
628 &dev_attr_iface_vlan_id.attr,
629 &dev_attr_iface_vlan_priority.attr,
630 &dev_attr_iface_vlan_enabled.attr,
631 &dev_attr_ipv4_iface_ipaddress.attr,
632 &dev_attr_ipv4_iface_gateway.attr,
633 &dev_attr_ipv4_iface_subnet.attr,
634 &dev_attr_ipv4_iface_bootproto.attr,
635 &dev_attr_ipv6_iface_ipaddress.attr,
636 &dev_attr_ipv6_iface_link_local_addr.attr,
637 &dev_attr_ipv6_iface_router_addr.attr,
638 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
639 &dev_attr_ipv6_iface_link_local_autocfg.attr,
640 &dev_attr_iface_mtu.attr,
641 &dev_attr_iface_port.attr,
642 &dev_attr_iface_ipaddress_state.attr,
643 &dev_attr_iface_delayed_ack_en.attr,
644 &dev_attr_iface_tcp_nagle_disable.attr,
645 &dev_attr_iface_tcp_wsf_disable.attr,
646 &dev_attr_iface_tcp_wsf.attr,
647 &dev_attr_iface_tcp_timer_scale.attr,
648 &dev_attr_iface_tcp_timestamp_en.attr,
649 &dev_attr_iface_cache_id.attr,
650 &dev_attr_iface_redirect_en.attr,
651 &dev_attr_iface_def_taskmgmt_tmo.attr,
652 &dev_attr_iface_header_digest.attr,
653 &dev_attr_iface_data_digest.attr,
654 &dev_attr_iface_immediate_data.attr,
655 &dev_attr_iface_initial_r2t.attr,
656 &dev_attr_iface_data_seq_in_order.attr,
657 &dev_attr_iface_data_pdu_in_order.attr,
658 &dev_attr_iface_erl.attr,
659 &dev_attr_iface_max_recv_dlength.attr,
660 &dev_attr_iface_first_burst_len.attr,
661 &dev_attr_iface_max_outstanding_r2t.attr,
662 &dev_attr_iface_max_burst_len.attr,
663 &dev_attr_iface_chap_auth.attr,
664 &dev_attr_iface_bidi_chap.attr,
665 &dev_attr_iface_discovery_auth_optional.attr,
666 &dev_attr_iface_discovery_logout.attr,
667 &dev_attr_iface_strict_login_comp_en.attr,
668 &dev_attr_iface_initiator_name.attr,
669 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
670 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
671 &dev_attr_ipv4_iface_tos_en.attr,
672 &dev_attr_ipv4_iface_tos.attr,
673 &dev_attr_ipv4_iface_grat_arp_en.attr,
674 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
675 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
676 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
677 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
678 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
679 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
680 &dev_attr_ipv4_iface_fragment_disable.attr,
681 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
682 &dev_attr_ipv4_iface_ttl.attr,
683 &dev_attr_ipv6_iface_link_local_state.attr,
684 &dev_attr_ipv6_iface_router_state.attr,
685 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
686 &dev_attr_ipv6_iface_mld_en.attr,
687 &dev_attr_ipv6_iface_flow_label.attr,
688 &dev_attr_ipv6_iface_traffic_class.attr,
689 &dev_attr_ipv6_iface_hop_limit.attr,
690 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
691 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
692 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
693 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
694 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
698 static struct attribute_group iscsi_iface_group = {
699 .attrs = iscsi_iface_attrs,
700 .is_visible = iscsi_iface_attr_is_visible,
703 /* convert iscsi_ipaddress_state values to ascii string name */
704 static const struct {
705 enum iscsi_ipaddress_state value;
707 } iscsi_ipaddress_state_names[] = {
708 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
709 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
710 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
711 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
712 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
713 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
714 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
717 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
722 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
723 if (iscsi_ipaddress_state_names[i].value == port_state) {
724 state = iscsi_ipaddress_state_names[i].name;
730 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
732 /* convert iscsi_router_state values to ascii string name */
733 static const struct {
734 enum iscsi_router_state value;
736 } iscsi_router_state_names[] = {
737 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
738 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
739 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
740 {ISCSI_ROUTER_STATE_STALE, "Stale" },
743 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
748 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
749 if (iscsi_router_state_names[i].value == router_state) {
750 state = iscsi_router_state_names[i].name;
756 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
759 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
760 uint32_t iface_type, uint32_t iface_num, int dd_size)
762 struct iscsi_iface *iface;
765 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
769 iface->transport = transport;
770 iface->iface_type = iface_type;
771 iface->iface_num = iface_num;
772 iface->dev.release = iscsi_iface_release;
773 iface->dev.class = &iscsi_iface_class;
774 /* parent reference released in iscsi_iface_release */
775 iface->dev.parent = get_device(&shost->shost_gendev);
776 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
777 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
780 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
783 err = device_register(&iface->dev);
787 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
792 iface->dd_data = &iface[1];
796 device_unregister(&iface->dev);
800 put_device(iface->dev.parent);
804 EXPORT_SYMBOL_GPL(iscsi_create_iface);
806 void iscsi_destroy_iface(struct iscsi_iface *iface)
808 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
809 device_unregister(&iface->dev);
811 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
814 * Interface to display flash node params to sysfs
817 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
818 struct device_attribute dev_attr_##_prefix##_##_name = \
819 __ATTR(_name, _mode, _show, _store)
821 /* flash node session attrs show */
822 #define iscsi_flashnode_sess_attr_show(type, name, param) \
824 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
827 struct iscsi_bus_flash_session *fnode_sess = \
828 iscsi_dev_to_flash_session(dev);\
829 struct iscsi_transport *t = fnode_sess->transport; \
830 return t->get_flashnode_param(fnode_sess, param, buf); \
834 #define iscsi_flashnode_sess_attr(type, name, param) \
835 iscsi_flashnode_sess_attr_show(type, name, param) \
836 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
837 show_##type##_##name, NULL);
839 /* Flash node session attributes */
841 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
842 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
843 iscsi_flashnode_sess_attr(fnode, discovery_session,
844 ISCSI_FLASHNODE_DISCOVERY_SESS);
845 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
846 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
847 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
848 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
849 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
850 ISCSI_FLASHNODE_DATASEQ_INORDER);
851 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
852 ISCSI_FLASHNODE_PDU_INORDER);
853 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
854 iscsi_flashnode_sess_attr(fnode, discovery_logout,
855 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
856 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
857 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
858 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
859 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
860 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
861 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
862 iscsi_flashnode_sess_attr(fnode, def_time2retain,
863 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
864 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
865 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
866 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
867 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
868 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
869 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
870 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
871 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
872 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
873 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
874 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
875 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
876 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
877 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
878 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
879 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
880 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
881 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
882 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
883 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
885 static struct attribute *iscsi_flashnode_sess_attrs[] = {
886 &dev_attr_fnode_auto_snd_tgt_disable.attr,
887 &dev_attr_fnode_discovery_session.attr,
888 &dev_attr_fnode_portal_type.attr,
889 &dev_attr_fnode_entry_enable.attr,
890 &dev_attr_fnode_immediate_data.attr,
891 &dev_attr_fnode_initial_r2t.attr,
892 &dev_attr_fnode_data_seq_in_order.attr,
893 &dev_attr_fnode_data_pdu_in_order.attr,
894 &dev_attr_fnode_chap_auth.attr,
895 &dev_attr_fnode_discovery_logout.attr,
896 &dev_attr_fnode_bidi_chap.attr,
897 &dev_attr_fnode_discovery_auth_optional.attr,
898 &dev_attr_fnode_erl.attr,
899 &dev_attr_fnode_first_burst_len.attr,
900 &dev_attr_fnode_def_time2wait.attr,
901 &dev_attr_fnode_def_time2retain.attr,
902 &dev_attr_fnode_max_outstanding_r2t.attr,
903 &dev_attr_fnode_isid.attr,
904 &dev_attr_fnode_tsid.attr,
905 &dev_attr_fnode_max_burst_len.attr,
906 &dev_attr_fnode_def_taskmgmt_tmo.attr,
907 &dev_attr_fnode_targetalias.attr,
908 &dev_attr_fnode_targetname.attr,
909 &dev_attr_fnode_tpgt.attr,
910 &dev_attr_fnode_discovery_parent_idx.attr,
911 &dev_attr_fnode_discovery_parent_type.attr,
912 &dev_attr_fnode_chap_in_idx.attr,
913 &dev_attr_fnode_chap_out_idx.attr,
914 &dev_attr_fnode_username.attr,
915 &dev_attr_fnode_username_in.attr,
916 &dev_attr_fnode_password.attr,
917 &dev_attr_fnode_password_in.attr,
918 &dev_attr_fnode_is_boot_target.attr,
922 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
923 struct attribute *attr,
926 struct device *dev = container_of(kobj, struct device, kobj);
927 struct iscsi_bus_flash_session *fnode_sess =
928 iscsi_dev_to_flash_session(dev);
929 struct iscsi_transport *t = fnode_sess->transport;
932 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
933 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
934 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
935 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
936 } else if (attr == &dev_attr_fnode_portal_type.attr) {
937 param = ISCSI_FLASHNODE_PORTAL_TYPE;
938 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
939 param = ISCSI_FLASHNODE_ENTRY_EN;
940 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
941 param = ISCSI_FLASHNODE_IMM_DATA_EN;
942 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
943 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
944 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
945 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
946 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
947 param = ISCSI_FLASHNODE_PDU_INORDER;
948 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
949 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
950 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
951 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
952 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
953 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
954 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
955 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
956 } else if (attr == &dev_attr_fnode_erl.attr) {
957 param = ISCSI_FLASHNODE_ERL;
958 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
959 param = ISCSI_FLASHNODE_FIRST_BURST;
960 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
961 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
962 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
963 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
964 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
965 param = ISCSI_FLASHNODE_MAX_R2T;
966 } else if (attr == &dev_attr_fnode_isid.attr) {
967 param = ISCSI_FLASHNODE_ISID;
968 } else if (attr == &dev_attr_fnode_tsid.attr) {
969 param = ISCSI_FLASHNODE_TSID;
970 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
971 param = ISCSI_FLASHNODE_MAX_BURST;
972 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
973 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
974 } else if (attr == &dev_attr_fnode_targetalias.attr) {
975 param = ISCSI_FLASHNODE_ALIAS;
976 } else if (attr == &dev_attr_fnode_targetname.attr) {
977 param = ISCSI_FLASHNODE_NAME;
978 } else if (attr == &dev_attr_fnode_tpgt.attr) {
979 param = ISCSI_FLASHNODE_TPGT;
980 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
981 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
982 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
983 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
984 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
985 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
986 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
987 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
988 } else if (attr == &dev_attr_fnode_username.attr) {
989 param = ISCSI_FLASHNODE_USERNAME;
990 } else if (attr == &dev_attr_fnode_username_in.attr) {
991 param = ISCSI_FLASHNODE_USERNAME_IN;
992 } else if (attr == &dev_attr_fnode_password.attr) {
993 param = ISCSI_FLASHNODE_PASSWORD;
994 } else if (attr == &dev_attr_fnode_password_in.attr) {
995 param = ISCSI_FLASHNODE_PASSWORD_IN;
996 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
997 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
999 WARN_ONCE(1, "Invalid flashnode session attr");
1003 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1006 static struct attribute_group iscsi_flashnode_sess_attr_group = {
1007 .attrs = iscsi_flashnode_sess_attrs,
1008 .is_visible = iscsi_flashnode_sess_attr_is_visible,
1011 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1012 &iscsi_flashnode_sess_attr_group,
1016 static void iscsi_flashnode_sess_release(struct device *dev)
1018 struct iscsi_bus_flash_session *fnode_sess =
1019 iscsi_dev_to_flash_session(dev);
1021 kfree(fnode_sess->targetname);
1022 kfree(fnode_sess->targetalias);
1023 kfree(fnode_sess->portal_type);
1027 static const struct device_type iscsi_flashnode_sess_dev_type = {
1028 .name = "iscsi_flashnode_sess_dev_type",
1029 .groups = iscsi_flashnode_sess_attr_groups,
1030 .release = iscsi_flashnode_sess_release,
1033 /* flash node connection attrs show */
1034 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1036 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1039 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1040 struct iscsi_bus_flash_session *fnode_sess = \
1041 iscsi_flash_conn_to_flash_session(fnode_conn);\
1042 struct iscsi_transport *t = fnode_conn->transport; \
1043 return t->get_flashnode_param(fnode_sess, param, buf); \
1047 #define iscsi_flashnode_conn_attr(type, name, param) \
1048 iscsi_flashnode_conn_attr_show(type, name, param) \
1049 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1050 show_##type##_##name, NULL);
1052 /* Flash node connection attributes */
1054 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1055 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1056 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1057 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1058 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1059 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1060 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1061 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1062 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1063 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1064 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1065 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1066 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1067 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1068 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1069 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1070 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1071 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1072 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1073 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1074 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1075 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1076 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1077 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1078 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1079 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1080 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1081 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1082 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1083 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1084 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1085 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1086 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1087 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1088 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1089 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1090 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1091 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1092 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1094 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1095 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1096 &dev_attr_fnode_header_digest.attr,
1097 &dev_attr_fnode_data_digest.attr,
1098 &dev_attr_fnode_snack_req.attr,
1099 &dev_attr_fnode_tcp_timestamp_stat.attr,
1100 &dev_attr_fnode_tcp_nagle_disable.attr,
1101 &dev_attr_fnode_tcp_wsf_disable.attr,
1102 &dev_attr_fnode_tcp_timer_scale.attr,
1103 &dev_attr_fnode_tcp_timestamp_enable.attr,
1104 &dev_attr_fnode_fragment_disable.attr,
1105 &dev_attr_fnode_max_recv_dlength.attr,
1106 &dev_attr_fnode_max_xmit_dlength.attr,
1107 &dev_attr_fnode_keepalive_tmo.attr,
1108 &dev_attr_fnode_port.attr,
1109 &dev_attr_fnode_ipaddress.attr,
1110 &dev_attr_fnode_redirect_ipaddr.attr,
1111 &dev_attr_fnode_max_segment_size.attr,
1112 &dev_attr_fnode_local_port.attr,
1113 &dev_attr_fnode_ipv4_tos.attr,
1114 &dev_attr_fnode_ipv6_traffic_class.attr,
1115 &dev_attr_fnode_ipv6_flow_label.attr,
1116 &dev_attr_fnode_link_local_ipv6.attr,
1117 &dev_attr_fnode_tcp_xmit_wsf.attr,
1118 &dev_attr_fnode_tcp_recv_wsf.attr,
1119 &dev_attr_fnode_statsn.attr,
1120 &dev_attr_fnode_exp_statsn.attr,
1124 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1125 struct attribute *attr,
1128 struct device *dev = container_of(kobj, struct device, kobj);
1129 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1130 struct iscsi_transport *t = fnode_conn->transport;
1133 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1134 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1135 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1136 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1137 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1138 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1139 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1140 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1141 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1142 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1143 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1144 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1145 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1146 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1147 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1148 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1149 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1150 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1151 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1152 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1153 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1154 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1155 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1156 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1157 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1158 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1159 } else if (attr == &dev_attr_fnode_port.attr) {
1160 param = ISCSI_FLASHNODE_PORT;
1161 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1162 param = ISCSI_FLASHNODE_IPADDR;
1163 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1164 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1165 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1166 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1167 } else if (attr == &dev_attr_fnode_local_port.attr) {
1168 param = ISCSI_FLASHNODE_LOCAL_PORT;
1169 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1170 param = ISCSI_FLASHNODE_IPV4_TOS;
1171 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1172 param = ISCSI_FLASHNODE_IPV6_TC;
1173 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1174 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1175 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1176 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1177 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1178 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1179 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1180 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1181 } else if (attr == &dev_attr_fnode_statsn.attr) {
1182 param = ISCSI_FLASHNODE_STATSN;
1183 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1184 param = ISCSI_FLASHNODE_EXP_STATSN;
1186 WARN_ONCE(1, "Invalid flashnode connection attr");
1190 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1193 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1194 .attrs = iscsi_flashnode_conn_attrs,
1195 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1198 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1199 &iscsi_flashnode_conn_attr_group,
1203 static void iscsi_flashnode_conn_release(struct device *dev)
1205 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1207 kfree(fnode_conn->ipaddress);
1208 kfree(fnode_conn->redirect_ipaddr);
1209 kfree(fnode_conn->link_local_ipv6_addr);
1213 static const struct device_type iscsi_flashnode_conn_dev_type = {
1214 .name = "iscsi_flashnode_conn_dev_type",
1215 .groups = iscsi_flashnode_conn_attr_groups,
1216 .release = iscsi_flashnode_conn_release,
1219 static struct bus_type iscsi_flashnode_bus;
1221 int iscsi_flashnode_bus_match(struct device *dev,
1222 struct device_driver *drv)
1224 if (dev->bus == &iscsi_flashnode_bus)
1228 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1230 static struct bus_type iscsi_flashnode_bus = {
1231 .name = "iscsi_flashnode",
1232 .match = &iscsi_flashnode_bus_match,
1236 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1237 * @shost: pointer to host data
1238 * @index: index of flashnode to add in sysfs
1239 * @transport: pointer to transport data
1240 * @dd_size: total size to allocate
1242 * Adds a sysfs entry for the flashnode session attributes
1245 * pointer to allocated flashnode sess on success
1248 struct iscsi_bus_flash_session *
1249 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1250 struct iscsi_transport *transport,
1253 struct iscsi_bus_flash_session *fnode_sess;
1256 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1260 fnode_sess->transport = transport;
1261 fnode_sess->target_id = index;
1262 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1263 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1264 fnode_sess->dev.parent = &shost->shost_gendev;
1265 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1266 shost->host_no, index);
1268 err = device_register(&fnode_sess->dev);
1270 goto free_fnode_sess;
1273 fnode_sess->dd_data = &fnode_sess[1];
1281 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1284 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1285 * @shost: pointer to host data
1286 * @fnode_sess: pointer to the parent flashnode session entry
1287 * @transport: pointer to transport data
1288 * @dd_size: total size to allocate
1290 * Adds a sysfs entry for the flashnode connection attributes
1293 * pointer to allocated flashnode conn on success
1296 struct iscsi_bus_flash_conn *
1297 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1298 struct iscsi_bus_flash_session *fnode_sess,
1299 struct iscsi_transport *transport,
1302 struct iscsi_bus_flash_conn *fnode_conn;
1305 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1309 fnode_conn->transport = transport;
1310 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1311 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1312 fnode_conn->dev.parent = &fnode_sess->dev;
1313 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1314 shost->host_no, fnode_sess->target_id);
1316 err = device_register(&fnode_conn->dev);
1318 goto free_fnode_conn;
1321 fnode_conn->dd_data = &fnode_conn[1];
1329 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1332 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1333 * @dev: device to verify
1334 * @data: pointer to data containing value to use for verification
1336 * Verifies if the passed device is flashnode conn device
1342 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1344 return dev->bus == &iscsi_flashnode_bus;
1347 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1349 device_unregister(&fnode_conn->dev);
1353 static int flashnode_match_index(struct device *dev, void *data)
1355 struct iscsi_bus_flash_session *fnode_sess = NULL;
1358 if (!iscsi_flashnode_bus_match(dev, NULL))
1359 goto exit_match_index;
1361 fnode_sess = iscsi_dev_to_flash_session(dev);
1362 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1369 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1370 * @shost: pointer to host data
1371 * @idx: index to match
1373 * Finds the flashnode session object for the passed index
1376 * pointer to found flashnode session object on success
1379 static struct iscsi_bus_flash_session *
1380 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1382 struct iscsi_bus_flash_session *fnode_sess = NULL;
1385 dev = device_find_child(&shost->shost_gendev, &idx,
1386 flashnode_match_index);
1388 fnode_sess = iscsi_dev_to_flash_session(dev);
1394 * iscsi_find_flashnode_sess - finds flashnode session entry
1395 * @shost: pointer to host data
1396 * @data: pointer to data containing value to use for comparison
1397 * @fn: function pointer that does actual comparison
1399 * Finds the flashnode session object comparing the data passed using logic
1400 * defined in passed function pointer
1403 * pointer to found flashnode session device object on success
1407 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1408 int (*fn)(struct device *dev, void *data))
1410 return device_find_child(&shost->shost_gendev, data, fn);
1412 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1415 * iscsi_find_flashnode_conn - finds flashnode connection entry
1416 * @fnode_sess: pointer to parent flashnode session entry
1418 * Finds the flashnode connection object comparing the data passed using logic
1419 * defined in passed function pointer
1422 * pointer to found flashnode connection device object on success
1426 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1428 return device_find_child(&fnode_sess->dev, NULL,
1429 iscsi_is_flashnode_conn_dev);
1431 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1433 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1435 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1438 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1442 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1443 * @fnode_sess: pointer to flashnode session entry to be destroyed
1445 * Deletes the flashnode session entry and all children flashnode connection
1446 * entries from sysfs
1448 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1452 err = device_for_each_child(&fnode_sess->dev, NULL,
1453 iscsi_iter_destroy_flashnode_conn_fn);
1455 pr_err("Could not delete all connections for %s. Error %d.\n",
1456 fnode_sess->dev.kobj.name, err);
1458 device_unregister(&fnode_sess->dev);
1460 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1462 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1464 if (!iscsi_flashnode_bus_match(dev, NULL))
1467 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1472 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1473 * @shost: pointer to host data
1475 * Destroys all the flashnode session entries and all corresponding children
1476 * flashnode connection entries from sysfs
1478 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1480 device_for_each_child(&shost->shost_gendev, NULL,
1481 iscsi_iter_destroy_flashnode_fn);
1483 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1489 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1490 * @job: bsg job to be processed
1492 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1494 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1495 struct iscsi_bsg_request *req = job->request;
1496 struct iscsi_bsg_reply *reply = job->reply;
1497 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1498 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1501 /* check if we have the msgcode value at least */
1502 if (job->request_len < sizeof(uint32_t)) {
1507 /* Validate the host command */
1508 switch (req->msgcode) {
1509 case ISCSI_BSG_HST_VENDOR:
1510 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1511 if ((shost->hostt->vendor_id == 0L) ||
1512 (req->rqst_data.h_vendor.vendor_id !=
1513 shost->hostt->vendor_id)) {
1523 /* check if we really have all the request data needed */
1524 if (job->request_len < cmdlen) {
1529 ret = i->iscsi_transport->bsg_request(job);
1534 /* return the errno failure code as the only status */
1535 BUG_ON(job->reply_len < sizeof(uint32_t));
1536 reply->reply_payload_rcv_len = 0;
1537 reply->result = ret;
1538 job->reply_len = sizeof(uint32_t);
1539 bsg_job_done(job, ret, 0);
1544 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1545 * @shost: shost for iscsi_host
1546 * @ihost: iscsi_cls_host adding the structures to
1549 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1551 struct device *dev = &shost->shost_gendev;
1552 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1553 struct request_queue *q;
1556 if (!i->iscsi_transport->bsg_request)
1559 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1560 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1562 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1563 "initialize - no request queue\n");
1566 __scsi_init_queue(shost, q);
1572 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1573 struct device *cdev)
1575 struct Scsi_Host *shost = dev_to_shost(dev);
1576 struct iscsi_cls_host *ihost = shost->shost_data;
1578 memset(ihost, 0, sizeof(*ihost));
1579 atomic_set(&ihost->nr_scans, 0);
1580 mutex_init(&ihost->mutex);
1582 iscsi_bsg_host_add(shost, ihost);
1583 /* ignore any bsg add error - we just can't do sgio */
1588 static int iscsi_remove_host(struct transport_container *tc,
1589 struct device *dev, struct device *cdev)
1591 struct Scsi_Host *shost = dev_to_shost(dev);
1592 struct iscsi_cls_host *ihost = shost->shost_data;
1594 bsg_remove_queue(ihost->bsg_q);
1598 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1604 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1610 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1616 static struct sock *nls;
1617 static DEFINE_MUTEX(rx_queue_mutex);
1620 * conn_mutex protects the {start,bind,stop,destroy}_conn from racing
1621 * against the kernel stop_connection recovery mechanism
1623 static DEFINE_MUTEX(conn_mutex);
1625 static LIST_HEAD(sesslist);
1626 static DEFINE_SPINLOCK(sesslock);
1627 static LIST_HEAD(connlist);
1628 static LIST_HEAD(connlist_err);
1629 static DEFINE_SPINLOCK(connlock);
1631 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1633 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1638 * Returns the matching session to a given sid
1640 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1642 unsigned long flags;
1643 struct iscsi_cls_session *sess;
1645 spin_lock_irqsave(&sesslock, flags);
1646 list_for_each_entry(sess, &sesslist, sess_list) {
1647 if (sess->sid == sid) {
1648 spin_unlock_irqrestore(&sesslock, flags);
1652 spin_unlock_irqrestore(&sesslock, flags);
1657 * Returns the matching connection to a given sid / cid tuple
1659 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1661 unsigned long flags;
1662 struct iscsi_cls_conn *conn;
1664 spin_lock_irqsave(&connlock, flags);
1665 list_for_each_entry(conn, &connlist, conn_list) {
1666 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1667 spin_unlock_irqrestore(&connlock, flags);
1671 spin_unlock_irqrestore(&connlock, flags);
1676 * The following functions can be used by LLDs that allocate
1677 * their own scsi_hosts or by software iscsi LLDs
1682 } iscsi_session_state_names[] = {
1683 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1684 { ISCSI_SESSION_FAILED, "FAILED" },
1685 { ISCSI_SESSION_FREE, "FREE" },
1688 static const char *iscsi_session_state_name(int state)
1693 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1694 if (iscsi_session_state_names[i].value == state) {
1695 name = iscsi_session_state_names[i].name;
1702 int iscsi_session_chkready(struct iscsi_cls_session *session)
1706 switch (session->state) {
1707 case ISCSI_SESSION_LOGGED_IN:
1710 case ISCSI_SESSION_FAILED:
1711 err = DID_IMM_RETRY << 16;
1713 case ISCSI_SESSION_FREE:
1714 err = DID_TRANSPORT_FAILFAST << 16;
1717 err = DID_NO_CONNECT << 16;
1722 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1724 int iscsi_is_session_online(struct iscsi_cls_session *session)
1726 unsigned long flags;
1729 spin_lock_irqsave(&session->lock, flags);
1730 if (session->state == ISCSI_SESSION_LOGGED_IN)
1732 spin_unlock_irqrestore(&session->lock, flags);
1735 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1737 static void iscsi_session_release(struct device *dev)
1739 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1740 struct Scsi_Host *shost;
1742 shost = iscsi_session_to_shost(session);
1743 scsi_host_put(shost);
1744 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1748 int iscsi_is_session_dev(const struct device *dev)
1750 return dev->release == iscsi_session_release;
1752 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1754 static int iscsi_iter_session_fn(struct device *dev, void *data)
1756 void (* fn) (struct iscsi_cls_session *) = data;
1758 if (!iscsi_is_session_dev(dev))
1760 fn(iscsi_dev_to_session(dev));
1764 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1765 void (*fn)(struct iscsi_cls_session *))
1767 device_for_each_child(&shost->shost_gendev, fn,
1768 iscsi_iter_session_fn);
1770 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1773 * iscsi_scan_finished - helper to report when running scans are done
1775 * @time: scan run time
1777 * This function can be used by drives like qla4xxx to report to the scsi
1778 * layer when the scans it kicked off at module load time are done.
1780 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1782 struct iscsi_cls_host *ihost = shost->shost_data;
1784 * qla4xxx will have kicked off some session unblocks before calling
1785 * scsi_scan_host, so just wait for them to complete.
1787 return !atomic_read(&ihost->nr_scans);
1789 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1791 struct iscsi_scan_data {
1792 unsigned int channel;
1795 enum scsi_scan_mode rescan;
1798 static int iscsi_user_scan_session(struct device *dev, void *data)
1800 struct iscsi_scan_data *scan_data = data;
1801 struct iscsi_cls_session *session;
1802 struct Scsi_Host *shost;
1803 struct iscsi_cls_host *ihost;
1804 unsigned long flags;
1807 if (!iscsi_is_session_dev(dev))
1810 session = iscsi_dev_to_session(dev);
1812 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1814 shost = iscsi_session_to_shost(session);
1815 ihost = shost->shost_data;
1817 mutex_lock(&ihost->mutex);
1818 spin_lock_irqsave(&session->lock, flags);
1819 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1820 spin_unlock_irqrestore(&session->lock, flags);
1821 goto user_scan_exit;
1823 id = session->target_id;
1824 spin_unlock_irqrestore(&session->lock, flags);
1826 if (id != ISCSI_MAX_TARGET) {
1827 if ((scan_data->channel == SCAN_WILD_CARD ||
1828 scan_data->channel == 0) &&
1829 (scan_data->id == SCAN_WILD_CARD ||
1830 scan_data->id == id))
1831 scsi_scan_target(&session->dev, 0, id,
1832 scan_data->lun, scan_data->rescan);
1836 mutex_unlock(&ihost->mutex);
1837 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1841 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1844 struct iscsi_scan_data scan_data;
1846 scan_data.channel = channel;
1848 scan_data.lun = lun;
1849 scan_data.rescan = SCSI_SCAN_MANUAL;
1851 return device_for_each_child(&shost->shost_gendev, &scan_data,
1852 iscsi_user_scan_session);
1855 static void iscsi_scan_session(struct work_struct *work)
1857 struct iscsi_cls_session *session =
1858 container_of(work, struct iscsi_cls_session, scan_work);
1859 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1860 struct iscsi_cls_host *ihost = shost->shost_data;
1861 struct iscsi_scan_data scan_data;
1863 scan_data.channel = 0;
1864 scan_data.id = SCAN_WILD_CARD;
1865 scan_data.lun = SCAN_WILD_CARD;
1866 scan_data.rescan = SCSI_SCAN_RESCAN;
1868 iscsi_user_scan_session(&session->dev, &scan_data);
1869 atomic_dec(&ihost->nr_scans);
1873 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1874 * @cmd: scsi cmd passed to scsi eh handler
1876 * If the session is down this function will wait for the recovery
1877 * timer to fire or for the session to be logged back in. If the
1878 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1879 * should pass this error value to the scsi eh.
1881 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1883 struct iscsi_cls_session *session =
1884 starget_to_session(scsi_target(cmd->device));
1885 unsigned long flags;
1888 spin_lock_irqsave(&session->lock, flags);
1889 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1890 if (session->state == ISCSI_SESSION_FREE) {
1894 spin_unlock_irqrestore(&session->lock, flags);
1896 spin_lock_irqsave(&session->lock, flags);
1898 spin_unlock_irqrestore(&session->lock, flags);
1901 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1903 static void session_recovery_timedout(struct work_struct *work)
1905 struct iscsi_cls_session *session =
1906 container_of(work, struct iscsi_cls_session,
1907 recovery_work.work);
1908 unsigned long flags;
1910 iscsi_cls_session_printk(KERN_INFO, session,
1911 "session recovery timed out after %d secs\n",
1912 session->recovery_tmo);
1914 spin_lock_irqsave(&session->lock, flags);
1915 switch (session->state) {
1916 case ISCSI_SESSION_FAILED:
1917 session->state = ISCSI_SESSION_FREE;
1919 case ISCSI_SESSION_LOGGED_IN:
1920 case ISCSI_SESSION_FREE:
1921 /* we raced with the unblock's flush */
1922 spin_unlock_irqrestore(&session->lock, flags);
1925 spin_unlock_irqrestore(&session->lock, flags);
1927 if (session->transport->session_recovery_timedout)
1928 session->transport->session_recovery_timedout(session);
1930 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1931 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1932 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1935 static void __iscsi_unblock_session(struct work_struct *work)
1937 struct iscsi_cls_session *session =
1938 container_of(work, struct iscsi_cls_session,
1940 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1941 struct iscsi_cls_host *ihost = shost->shost_data;
1942 unsigned long flags;
1944 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1946 * The recovery and unblock work get run from the same workqueue,
1947 * so try to cancel it if it was going to run after this unblock.
1949 cancel_delayed_work(&session->recovery_work);
1950 spin_lock_irqsave(&session->lock, flags);
1951 session->state = ISCSI_SESSION_LOGGED_IN;
1952 spin_unlock_irqrestore(&session->lock, flags);
1954 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1956 * Only do kernel scanning if the driver is properly hooked into
1957 * the async scanning code (drivers like iscsi_tcp do login and
1958 * scanning from userspace).
1960 if (shost->hostt->scan_finished) {
1961 if (scsi_queue_work(shost, &session->scan_work))
1962 atomic_inc(&ihost->nr_scans);
1964 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1968 * iscsi_unblock_session - set a session as logged in and start IO.
1969 * @session: iscsi session
1971 * Mark a session as ready to accept IO.
1973 void iscsi_unblock_session(struct iscsi_cls_session *session)
1975 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1977 * Blocking the session can be done from any context so we only
1978 * queue the block work. Make sure the unblock work has completed
1979 * because it flushes/cancels the other works and updates the state.
1981 flush_work(&session->unblock_work);
1983 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1985 static void __iscsi_block_session(struct work_struct *work)
1987 struct iscsi_cls_session *session =
1988 container_of(work, struct iscsi_cls_session,
1990 unsigned long flags;
1992 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1993 spin_lock_irqsave(&session->lock, flags);
1994 session->state = ISCSI_SESSION_FAILED;
1995 spin_unlock_irqrestore(&session->lock, flags);
1996 scsi_target_block(&session->dev);
1997 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1998 if (session->recovery_tmo >= 0)
1999 queue_delayed_work(iscsi_eh_timer_workq,
2000 &session->recovery_work,
2001 session->recovery_tmo * HZ);
2004 void iscsi_block_session(struct iscsi_cls_session *session)
2006 queue_work(iscsi_eh_timer_workq, &session->block_work);
2008 EXPORT_SYMBOL_GPL(iscsi_block_session);
2010 static void __iscsi_unbind_session(struct work_struct *work)
2012 struct iscsi_cls_session *session =
2013 container_of(work, struct iscsi_cls_session,
2015 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2016 struct iscsi_cls_host *ihost = shost->shost_data;
2017 unsigned long flags;
2018 unsigned int target_id;
2020 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2022 /* Prevent new scans and make sure scanning is not in progress */
2023 mutex_lock(&ihost->mutex);
2024 spin_lock_irqsave(&session->lock, flags);
2025 if (session->target_id == ISCSI_MAX_TARGET) {
2026 spin_unlock_irqrestore(&session->lock, flags);
2027 mutex_unlock(&ihost->mutex);
2028 goto unbind_session_exit;
2031 target_id = session->target_id;
2032 session->target_id = ISCSI_MAX_TARGET;
2033 spin_unlock_irqrestore(&session->lock, flags);
2034 mutex_unlock(&ihost->mutex);
2036 scsi_remove_target(&session->dev);
2038 if (session->ida_used)
2039 ida_simple_remove(&iscsi_sess_ida, target_id);
2041 unbind_session_exit:
2042 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2043 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2046 static void __iscsi_destroy_session(struct work_struct *work)
2048 struct iscsi_cls_session *session =
2049 container_of(work, struct iscsi_cls_session, destroy_work);
2051 session->transport->destroy_session(session);
2054 struct iscsi_cls_session *
2055 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2058 struct iscsi_cls_session *session;
2060 session = kzalloc(sizeof(*session) + dd_size,
2065 session->transport = transport;
2066 session->creator = -1;
2067 session->recovery_tmo = 120;
2068 session->recovery_tmo_sysfs_override = false;
2069 session->state = ISCSI_SESSION_FREE;
2070 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2071 INIT_LIST_HEAD(&session->sess_list);
2072 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2073 INIT_WORK(&session->block_work, __iscsi_block_session);
2074 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2075 INIT_WORK(&session->scan_work, iscsi_scan_session);
2076 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2077 spin_lock_init(&session->lock);
2079 /* this is released in the dev's release function */
2080 scsi_host_get(shost);
2081 session->dev.parent = &shost->shost_gendev;
2082 session->dev.release = iscsi_session_release;
2083 device_initialize(&session->dev);
2085 session->dd_data = &session[1];
2087 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2090 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2092 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2094 unsigned long flags;
2098 session->sid = atomic_add_return(1, &iscsi_session_nr);
2100 if (target_id == ISCSI_MAX_TARGET) {
2101 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2104 iscsi_cls_session_printk(KERN_ERR, session,
2105 "Failure in Target ID Allocation\n");
2108 session->target_id = (unsigned int)id;
2109 session->ida_used = true;
2111 session->target_id = target_id;
2113 dev_set_name(&session->dev, "session%u", session->sid);
2114 err = device_add(&session->dev);
2116 iscsi_cls_session_printk(KERN_ERR, session,
2117 "could not register session's dev\n");
2120 err = transport_register_device(&session->dev);
2122 iscsi_cls_session_printk(KERN_ERR, session,
2123 "could not register transport's dev\n");
2127 spin_lock_irqsave(&sesslock, flags);
2128 list_add(&session->sess_list, &sesslist);
2129 spin_unlock_irqrestore(&sesslock, flags);
2131 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2132 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2136 device_del(&session->dev);
2138 if (session->ida_used)
2139 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2143 EXPORT_SYMBOL_GPL(iscsi_add_session);
2146 * iscsi_create_session - create iscsi class session
2148 * @transport: iscsi transport
2149 * @dd_size: private driver data size
2150 * @target_id: which target
2152 * This can be called from a LLD or iscsi_transport.
2154 struct iscsi_cls_session *
2155 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2156 int dd_size, unsigned int target_id)
2158 struct iscsi_cls_session *session;
2160 session = iscsi_alloc_session(shost, transport, dd_size);
2164 if (iscsi_add_session(session, target_id)) {
2165 iscsi_free_session(session);
2170 EXPORT_SYMBOL_GPL(iscsi_create_session);
2172 static void iscsi_conn_release(struct device *dev)
2174 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2175 struct device *parent = conn->dev.parent;
2177 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2182 static int iscsi_is_conn_dev(const struct device *dev)
2184 return dev->release == iscsi_conn_release;
2187 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2189 if (!iscsi_is_conn_dev(dev))
2191 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2194 void iscsi_remove_session(struct iscsi_cls_session *session)
2196 unsigned long flags;
2199 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2201 spin_lock_irqsave(&sesslock, flags);
2202 if (!list_empty(&session->sess_list))
2203 list_del(&session->sess_list);
2204 spin_unlock_irqrestore(&sesslock, flags);
2206 flush_work(&session->block_work);
2207 flush_work(&session->unblock_work);
2208 cancel_delayed_work_sync(&session->recovery_work);
2210 * If we are blocked let commands flow again. The lld or iscsi
2211 * layer should set up the queuecommand to fail commands.
2212 * We assume that LLD will not be calling block/unblock while
2213 * removing the session.
2215 spin_lock_irqsave(&session->lock, flags);
2216 session->state = ISCSI_SESSION_FREE;
2217 spin_unlock_irqrestore(&session->lock, flags);
2219 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2220 /* flush running scans then delete devices */
2221 flush_work(&session->scan_work);
2222 /* flush running unbind operations */
2223 flush_work(&session->unbind_work);
2224 __iscsi_unbind_session(&session->unbind_work);
2226 /* hw iscsi may not have removed all connections from session */
2227 err = device_for_each_child(&session->dev, NULL,
2228 iscsi_iter_destroy_conn_fn);
2230 iscsi_cls_session_printk(KERN_ERR, session,
2231 "Could not delete all connections "
2232 "for session. Error %d.\n", err);
2234 transport_unregister_device(&session->dev);
2236 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2237 device_del(&session->dev);
2239 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2241 void iscsi_free_session(struct iscsi_cls_session *session)
2243 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2244 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2245 put_device(&session->dev);
2247 EXPORT_SYMBOL_GPL(iscsi_free_session);
2250 * iscsi_create_conn - create iscsi class connection
2251 * @session: iscsi cls session
2252 * @dd_size: private driver data size
2253 * @cid: connection id
2255 * This can be called from a LLD or iscsi_transport. The connection
2256 * is child of the session so cid must be unique for all connections
2259 * Since we do not support MCS, cid will normally be zero. In some cases
2260 * for software iscsi we could be trying to preallocate a connection struct
2261 * in which case there could be two connection structs and cid would be
2264 struct iscsi_cls_conn *
2265 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2267 struct iscsi_transport *transport = session->transport;
2268 struct iscsi_cls_conn *conn;
2269 unsigned long flags;
2272 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2276 conn->dd_data = &conn[1];
2278 mutex_init(&conn->ep_mutex);
2279 INIT_LIST_HEAD(&conn->conn_list);
2280 INIT_LIST_HEAD(&conn->conn_list_err);
2281 conn->transport = transport;
2283 conn->state = ISCSI_CONN_DOWN;
2285 /* this is released in the dev's release function */
2286 if (!get_device(&session->dev))
2289 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2290 conn->dev.parent = &session->dev;
2291 conn->dev.release = iscsi_conn_release;
2292 err = device_register(&conn->dev);
2294 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2295 "register connection's dev\n");
2296 goto release_parent_ref;
2298 err = transport_register_device(&conn->dev);
2300 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2301 "register transport's dev\n");
2302 goto release_conn_ref;
2305 spin_lock_irqsave(&connlock, flags);
2306 list_add(&conn->conn_list, &connlist);
2307 spin_unlock_irqrestore(&connlock, flags);
2309 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2313 device_unregister(&conn->dev);
2314 put_device(&session->dev);
2317 put_device(&session->dev);
2323 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2326 * iscsi_destroy_conn - destroy iscsi class connection
2327 * @conn: iscsi cls session
2329 * This can be called from a LLD or iscsi_transport.
2331 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2333 unsigned long flags;
2335 spin_lock_irqsave(&connlock, flags);
2336 list_del(&conn->conn_list);
2337 list_del(&conn->conn_list_err);
2338 spin_unlock_irqrestore(&connlock, flags);
2340 transport_unregister_device(&conn->dev);
2341 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2342 device_unregister(&conn->dev);
2345 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2348 * iscsi interface functions
2350 static struct iscsi_internal *
2351 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2353 struct iscsi_internal *priv;
2354 unsigned long flags;
2356 spin_lock_irqsave(&iscsi_transport_lock, flags);
2357 list_for_each_entry(priv, &iscsi_transports, list) {
2358 if (tt == priv->iscsi_transport) {
2359 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2363 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2368 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2370 return nlmsg_multicast(nls, skb, 0, group, gfp);
2374 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2376 return nlmsg_unicast(nls, skb, portid);
2379 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2380 char *data, uint32_t data_size)
2382 struct nlmsghdr *nlh;
2383 struct sk_buff *skb;
2384 struct iscsi_uevent *ev;
2386 struct iscsi_internal *priv;
2387 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2390 priv = iscsi_if_transport_lookup(conn->transport);
2394 skb = alloc_skb(len, GFP_ATOMIC);
2396 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2397 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2398 "control PDU: OOM\n");
2402 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2403 ev = nlmsg_data(nlh);
2404 memset(ev, 0, sizeof(*ev));
2405 ev->transport_handle = iscsi_handle(conn->transport);
2406 ev->type = ISCSI_KEVENT_RECV_PDU;
2407 ev->r.recv_req.cid = conn->cid;
2408 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2409 pdu = (char*)ev + sizeof(*ev);
2410 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2411 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2413 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2415 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2417 int iscsi_offload_mesg(struct Scsi_Host *shost,
2418 struct iscsi_transport *transport, uint32_t type,
2419 char *data, uint16_t data_size)
2421 struct nlmsghdr *nlh;
2422 struct sk_buff *skb;
2423 struct iscsi_uevent *ev;
2424 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2426 skb = alloc_skb(len, GFP_ATOMIC);
2428 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2432 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2433 ev = nlmsg_data(nlh);
2434 memset(ev, 0, sizeof(*ev));
2436 ev->transport_handle = iscsi_handle(transport);
2438 case ISCSI_KEVENT_PATH_REQ:
2439 ev->r.req_path.host_no = shost->host_no;
2441 case ISCSI_KEVENT_IF_DOWN:
2442 ev->r.notify_if_down.host_no = shost->host_no;
2446 memcpy((char *)ev + sizeof(*ev), data, data_size);
2448 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2450 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2453 * This can be called without the rx_queue_mutex, if invoked by the kernel
2454 * stop work. But, in that case, it is guaranteed not to race with
2455 * iscsi_destroy by conn_mutex.
2457 static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag)
2460 * It is important that this path doesn't rely on
2461 * rx_queue_mutex, otherwise, a thread doing allocation on a
2462 * start_session/start_connection could sleep waiting on a
2463 * writeback to a failed iscsi device, that cannot be recovered
2464 * because the lock is held. If we don't hold it here, the
2465 * kernel stop_conn_work_fn has a chance to stop the broken
2466 * session and resolve the allocation.
2468 * Still, the user invoked .stop_conn() needs to be serialized
2469 * with stop_conn_work_fn by a private mutex. Not pretty, but
2472 mutex_lock(&conn_mutex);
2473 conn->transport->stop_conn(conn, flag);
2474 mutex_unlock(&conn_mutex);
2478 static void stop_conn_work_fn(struct work_struct *work)
2480 struct iscsi_cls_conn *conn, *tmp;
2481 unsigned long flags;
2482 LIST_HEAD(recovery_list);
2484 spin_lock_irqsave(&connlock, flags);
2485 if (list_empty(&connlist_err)) {
2486 spin_unlock_irqrestore(&connlock, flags);
2489 list_splice_init(&connlist_err, &recovery_list);
2490 spin_unlock_irqrestore(&connlock, flags);
2492 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) {
2493 uint32_t sid = iscsi_conn_get_sid(conn);
2494 struct iscsi_cls_session *session;
2496 session = iscsi_session_lookup(sid);
2498 if (system_state != SYSTEM_RUNNING) {
2499 session->recovery_tmo = 0;
2500 iscsi_if_stop_conn(conn, STOP_CONN_TERM);
2502 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER);
2506 list_del_init(&conn->conn_list_err);
2510 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2512 struct nlmsghdr *nlh;
2513 struct sk_buff *skb;
2514 struct iscsi_uevent *ev;
2515 struct iscsi_internal *priv;
2516 int len = nlmsg_total_size(sizeof(*ev));
2517 unsigned long flags;
2519 spin_lock_irqsave(&connlock, flags);
2520 list_add(&conn->conn_list_err, &connlist_err);
2521 spin_unlock_irqrestore(&connlock, flags);
2522 queue_work(system_unbound_wq, &stop_conn_work);
2524 priv = iscsi_if_transport_lookup(conn->transport);
2528 skb = alloc_skb(len, GFP_ATOMIC);
2530 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2531 "conn error (%d)\n", error);
2535 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2536 ev = nlmsg_data(nlh);
2537 ev->transport_handle = iscsi_handle(conn->transport);
2538 ev->type = ISCSI_KEVENT_CONN_ERROR;
2539 ev->r.connerror.error = error;
2540 ev->r.connerror.cid = conn->cid;
2541 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2543 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2545 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2548 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2550 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2551 enum iscsi_conn_state state)
2553 struct nlmsghdr *nlh;
2554 struct sk_buff *skb;
2555 struct iscsi_uevent *ev;
2556 struct iscsi_internal *priv;
2557 int len = nlmsg_total_size(sizeof(*ev));
2559 priv = iscsi_if_transport_lookup(conn->transport);
2563 skb = alloc_skb(len, GFP_ATOMIC);
2565 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2566 "conn login (%d)\n", state);
2570 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2571 ev = nlmsg_data(nlh);
2572 ev->transport_handle = iscsi_handle(conn->transport);
2573 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2574 ev->r.conn_login.state = state;
2575 ev->r.conn_login.cid = conn->cid;
2576 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2577 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2579 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2582 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2584 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2585 enum iscsi_host_event_code code, uint32_t data_size,
2588 struct nlmsghdr *nlh;
2589 struct sk_buff *skb;
2590 struct iscsi_uevent *ev;
2591 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2593 skb = alloc_skb(len, GFP_NOIO);
2595 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2600 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2601 ev = nlmsg_data(nlh);
2602 ev->transport_handle = iscsi_handle(transport);
2603 ev->type = ISCSI_KEVENT_HOST_EVENT;
2604 ev->r.host_event.host_no = host_no;
2605 ev->r.host_event.code = code;
2606 ev->r.host_event.data_size = data_size;
2609 memcpy((char *)ev + sizeof(*ev), data, data_size);
2611 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2613 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2615 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2616 uint32_t status, uint32_t pid, uint32_t data_size,
2619 struct nlmsghdr *nlh;
2620 struct sk_buff *skb;
2621 struct iscsi_uevent *ev;
2622 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2624 skb = alloc_skb(len, GFP_NOIO);
2626 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2630 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2631 ev = nlmsg_data(nlh);
2632 ev->transport_handle = iscsi_handle(transport);
2633 ev->type = ISCSI_KEVENT_PING_COMP;
2634 ev->r.ping_comp.host_no = host_no;
2635 ev->r.ping_comp.status = status;
2636 ev->r.ping_comp.pid = pid;
2637 ev->r.ping_comp.data_size = data_size;
2638 memcpy((char *)ev + sizeof(*ev), data, data_size);
2640 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2642 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2645 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2647 struct sk_buff *skb;
2648 struct nlmsghdr *nlh;
2649 int len = nlmsg_total_size(size);
2651 skb = alloc_skb(len, GFP_ATOMIC);
2653 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2657 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2658 memcpy(nlmsg_data(nlh), payload, size);
2659 return iscsi_unicast_skb(skb, portid);
2663 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2665 struct iscsi_uevent *ev = nlmsg_data(nlh);
2666 struct iscsi_stats *stats;
2667 struct sk_buff *skbstat;
2668 struct iscsi_cls_conn *conn;
2669 struct nlmsghdr *nlhstat;
2670 struct iscsi_uevent *evstat;
2671 struct iscsi_internal *priv;
2672 int len = nlmsg_total_size(sizeof(*ev) +
2673 sizeof(struct iscsi_stats) +
2674 sizeof(struct iscsi_stats_custom) *
2675 ISCSI_STATS_CUSTOM_MAX);
2678 priv = iscsi_if_transport_lookup(transport);
2682 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2689 skbstat = alloc_skb(len, GFP_ATOMIC);
2691 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2692 "deliver stats: OOM\n");
2696 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2697 (len - sizeof(*nlhstat)), 0);
2698 evstat = nlmsg_data(nlhstat);
2699 memset(evstat, 0, sizeof(*evstat));
2700 evstat->transport_handle = iscsi_handle(conn->transport);
2701 evstat->type = nlh->nlmsg_type;
2702 evstat->u.get_stats.cid =
2703 ev->u.get_stats.cid;
2704 evstat->u.get_stats.sid =
2705 ev->u.get_stats.sid;
2706 stats = (struct iscsi_stats *)
2707 ((char*)evstat + sizeof(*evstat));
2708 memset(stats, 0, sizeof(*stats));
2710 transport->get_stats(conn, stats);
2711 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2712 sizeof(struct iscsi_stats) +
2713 sizeof(struct iscsi_stats_custom) *
2714 stats->custom_length);
2715 actual_size -= sizeof(*nlhstat);
2716 actual_size = nlmsg_msg_size(actual_size);
2717 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2718 nlhstat->nlmsg_len = actual_size;
2720 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2722 } while (err < 0 && err != -ECONNREFUSED);
2728 * iscsi_session_event - send session destr. completion event
2729 * @session: iscsi class session
2730 * @event: type of event
2732 int iscsi_session_event(struct iscsi_cls_session *session,
2733 enum iscsi_uevent_e event)
2735 struct iscsi_internal *priv;
2736 struct Scsi_Host *shost;
2737 struct iscsi_uevent *ev;
2738 struct sk_buff *skb;
2739 struct nlmsghdr *nlh;
2740 int rc, len = nlmsg_total_size(sizeof(*ev));
2742 priv = iscsi_if_transport_lookup(session->transport);
2745 shost = iscsi_session_to_shost(session);
2747 skb = alloc_skb(len, GFP_KERNEL);
2749 iscsi_cls_session_printk(KERN_ERR, session,
2750 "Cannot notify userspace of session "
2751 "event %u\n", event);
2755 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2756 ev = nlmsg_data(nlh);
2757 ev->transport_handle = iscsi_handle(session->transport);
2761 case ISCSI_KEVENT_DESTROY_SESSION:
2762 ev->r.d_session.host_no = shost->host_no;
2763 ev->r.d_session.sid = session->sid;
2765 case ISCSI_KEVENT_CREATE_SESSION:
2766 ev->r.c_session_ret.host_no = shost->host_no;
2767 ev->r.c_session_ret.sid = session->sid;
2769 case ISCSI_KEVENT_UNBIND_SESSION:
2770 ev->r.unbind_session.host_no = shost->host_no;
2771 ev->r.unbind_session.sid = session->sid;
2774 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2781 * this will occur if the daemon is not up, so we just warn
2782 * the user and when the daemon is restarted it will handle it
2784 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2786 iscsi_cls_session_printk(KERN_ERR, session,
2787 "Cannot notify userspace of session "
2788 "event %u. Check iscsi daemon\n",
2791 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2795 EXPORT_SYMBOL_GPL(iscsi_session_event);
2798 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2799 struct iscsi_uevent *ev, pid_t pid,
2800 uint32_t initial_cmdsn, uint16_t cmds_max,
2801 uint16_t queue_depth)
2803 struct iscsi_transport *transport = priv->iscsi_transport;
2804 struct iscsi_cls_session *session;
2805 struct Scsi_Host *shost;
2807 session = transport->create_session(ep, cmds_max, queue_depth,
2812 session->creator = pid;
2813 shost = iscsi_session_to_shost(session);
2814 ev->r.c_session_ret.host_no = shost->host_no;
2815 ev->r.c_session_ret.sid = session->sid;
2816 ISCSI_DBG_TRANS_SESSION(session,
2817 "Completed creating transport session\n");
2822 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2824 struct iscsi_cls_conn *conn;
2825 struct iscsi_cls_session *session;
2827 session = iscsi_session_lookup(ev->u.c_conn.sid);
2829 printk(KERN_ERR "iscsi: invalid session %d.\n",
2834 conn = transport->create_conn(session, ev->u.c_conn.cid);
2836 iscsi_cls_session_printk(KERN_ERR, session,
2837 "couldn't create a new connection.");
2841 ev->r.c_conn_ret.sid = session->sid;
2842 ev->r.c_conn_ret.cid = conn->cid;
2844 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2849 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2851 struct iscsi_cls_conn *conn;
2852 unsigned long flags;
2854 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2858 spin_lock_irqsave(&connlock, flags);
2859 if (!list_empty(&conn->conn_list_err)) {
2860 spin_unlock_irqrestore(&connlock, flags);
2863 spin_unlock_irqrestore(&connlock, flags);
2865 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2867 mutex_lock(&conn_mutex);
2868 if (transport->destroy_conn)
2869 transport->destroy_conn(conn);
2870 mutex_unlock(&conn_mutex);
2876 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2878 char *data = (char*)ev + sizeof(*ev);
2879 struct iscsi_cls_conn *conn;
2880 struct iscsi_cls_session *session;
2881 int err = 0, value = 0;
2883 session = iscsi_session_lookup(ev->u.set_param.sid);
2884 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2885 if (!conn || !session)
2888 switch (ev->u.set_param.param) {
2889 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2890 sscanf(data, "%d", &value);
2891 if (!session->recovery_tmo_sysfs_override)
2892 session->recovery_tmo = value;
2895 err = transport->set_param(conn, ev->u.set_param.param,
2896 data, ev->u.set_param.len);
2902 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2903 struct iscsi_uevent *ev, int msg_type)
2905 struct iscsi_endpoint *ep;
2906 struct sockaddr *dst_addr;
2907 struct Scsi_Host *shost = NULL;
2908 int non_blocking, err = 0;
2910 if (!transport->ep_connect)
2913 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2914 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2916 printk(KERN_ERR "ep connect failed. Could not find "
2918 ev->u.ep_connect_through_host.host_no);
2921 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2923 non_blocking = ev->u.ep_connect.non_blocking;
2925 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2926 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2932 ev->r.ep_connect_ret.handle = ep->id;
2935 scsi_host_put(shost);
2939 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2942 struct iscsi_cls_conn *conn;
2943 struct iscsi_endpoint *ep;
2945 if (!transport->ep_disconnect)
2948 ep = iscsi_lookup_endpoint(ep_handle);
2953 mutex_lock(&conn->ep_mutex);
2955 mutex_unlock(&conn->ep_mutex);
2958 transport->ep_disconnect(ep);
2963 iscsi_if_transport_ep(struct iscsi_transport *transport,
2964 struct iscsi_uevent *ev, int msg_type)
2966 struct iscsi_endpoint *ep;
2970 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2971 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2972 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2974 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2975 if (!transport->ep_poll)
2978 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2982 ev->r.retcode = transport->ep_poll(ep,
2983 ev->u.ep_poll.timeout_ms);
2985 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2986 rc = iscsi_if_ep_disconnect(transport,
2987 ev->u.ep_disconnect.ep_handle);
2994 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2995 struct iscsi_uevent *ev)
2997 struct Scsi_Host *shost;
2998 struct sockaddr *dst_addr;
3001 if (!transport->tgt_dscvr)
3004 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3006 printk(KERN_ERR "target discovery could not find host no %u\n",
3007 ev->u.tgt_dscvr.host_no);
3012 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3013 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3014 ev->u.tgt_dscvr.enable, dst_addr);
3015 scsi_host_put(shost);
3020 iscsi_set_host_param(struct iscsi_transport *transport,
3021 struct iscsi_uevent *ev)
3023 char *data = (char*)ev + sizeof(*ev);
3024 struct Scsi_Host *shost;
3027 if (!transport->set_host_param)
3030 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3032 printk(KERN_ERR "set_host_param could not find host no %u\n",
3033 ev->u.set_host_param.host_no);
3037 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3038 data, ev->u.set_host_param.len);
3039 scsi_host_put(shost);
3044 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3046 struct Scsi_Host *shost;
3047 struct iscsi_path *params;
3050 if (!transport->set_path)
3053 shost = scsi_host_lookup(ev->u.set_path.host_no);
3055 printk(KERN_ERR "set path could not find host no %u\n",
3056 ev->u.set_path.host_no);
3060 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3061 err = transport->set_path(shost, params);
3063 scsi_host_put(shost);
3067 static int iscsi_session_has_conns(int sid)
3069 struct iscsi_cls_conn *conn;
3070 unsigned long flags;
3073 spin_lock_irqsave(&connlock, flags);
3074 list_for_each_entry(conn, &connlist, conn_list) {
3075 if (iscsi_conn_get_sid(conn) == sid) {
3080 spin_unlock_irqrestore(&connlock, flags);
3086 iscsi_set_iface_params(struct iscsi_transport *transport,
3087 struct iscsi_uevent *ev, uint32_t len)
3089 char *data = (char *)ev + sizeof(*ev);
3090 struct Scsi_Host *shost;
3093 if (!transport->set_iface_param)
3096 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3098 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3099 ev->u.set_iface_params.host_no);
3103 err = transport->set_iface_param(shost, data, len);
3104 scsi_host_put(shost);
3109 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3111 struct Scsi_Host *shost;
3112 struct sockaddr *dst_addr;
3115 if (!transport->send_ping)
3118 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3120 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3121 ev->u.iscsi_ping.host_no);
3125 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3126 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3127 ev->u.iscsi_ping.iface_type,
3128 ev->u.iscsi_ping.payload_size,
3129 ev->u.iscsi_ping.pid,
3131 scsi_host_put(shost);
3136 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3138 struct iscsi_uevent *ev = nlmsg_data(nlh);
3139 struct Scsi_Host *shost = NULL;
3140 struct iscsi_chap_rec *chap_rec;
3141 struct iscsi_internal *priv;
3142 struct sk_buff *skbchap;
3143 struct nlmsghdr *nlhchap;
3144 struct iscsi_uevent *evchap;
3145 uint32_t chap_buf_size;
3149 if (!transport->get_chap)
3152 priv = iscsi_if_transport_lookup(transport);
3156 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3157 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3159 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3161 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3162 __func__, ev->u.get_chap.host_no);
3169 skbchap = alloc_skb(len, GFP_KERNEL);
3171 printk(KERN_ERR "can not deliver chap: OOM\n");
3176 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3177 (len - sizeof(*nlhchap)), 0);
3178 evchap = nlmsg_data(nlhchap);
3179 memset(evchap, 0, sizeof(*evchap));
3180 evchap->transport_handle = iscsi_handle(transport);
3181 evchap->type = nlh->nlmsg_type;
3182 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3183 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3184 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3185 buf = (char *)evchap + sizeof(*evchap);
3186 memset(buf, 0, chap_buf_size);
3188 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3189 &evchap->u.get_chap.num_entries, buf);
3191 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3192 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3193 nlhchap->nlmsg_len = actual_size;
3195 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3197 } while (err < 0 && err != -ECONNREFUSED);
3200 scsi_host_put(shost);
3204 static int iscsi_set_chap(struct iscsi_transport *transport,
3205 struct iscsi_uevent *ev, uint32_t len)
3207 char *data = (char *)ev + sizeof(*ev);
3208 struct Scsi_Host *shost;
3211 if (!transport->set_chap)
3214 shost = scsi_host_lookup(ev->u.set_path.host_no);
3216 pr_err("%s could not find host no %u\n",
3217 __func__, ev->u.set_path.host_no);
3221 err = transport->set_chap(shost, data, len);
3222 scsi_host_put(shost);
3226 static int iscsi_delete_chap(struct iscsi_transport *transport,
3227 struct iscsi_uevent *ev)
3229 struct Scsi_Host *shost;
3232 if (!transport->delete_chap)
3235 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3237 printk(KERN_ERR "%s could not find host no %u\n",
3238 __func__, ev->u.delete_chap.host_no);
3242 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3243 scsi_host_put(shost);
3247 static const struct {
3248 enum iscsi_discovery_parent_type value;
3250 } iscsi_discovery_parent_names[] = {
3251 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3252 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3253 {ISCSI_DISC_PARENT_ISNS, "isns" },
3256 char *iscsi_get_discovery_parent_name(int parent_type)
3259 char *state = "Unknown!";
3261 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3262 if (iscsi_discovery_parent_names[i].value & parent_type) {
3263 state = iscsi_discovery_parent_names[i].name;
3269 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3271 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3272 struct iscsi_uevent *ev, uint32_t len)
3274 char *data = (char *)ev + sizeof(*ev);
3275 struct Scsi_Host *shost;
3276 struct iscsi_bus_flash_session *fnode_sess;
3277 struct iscsi_bus_flash_conn *fnode_conn;
3282 if (!transport->set_flashnode_param) {
3284 goto exit_set_fnode;
3287 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3289 pr_err("%s could not find host no %u\n",
3290 __func__, ev->u.set_flashnode.host_no);
3292 goto exit_set_fnode;
3295 idx = ev->u.set_flashnode.flashnode_idx;
3296 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3298 pr_err("%s could not find flashnode %u for host no %u\n",
3299 __func__, idx, ev->u.set_flashnode.host_no);
3304 dev = iscsi_find_flashnode_conn(fnode_sess);
3310 fnode_conn = iscsi_dev_to_flash_conn(dev);
3311 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3315 put_device(&fnode_sess->dev);
3318 scsi_host_put(shost);
3324 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3325 struct iscsi_uevent *ev, uint32_t len)
3327 char *data = (char *)ev + sizeof(*ev);
3328 struct Scsi_Host *shost;
3332 if (!transport->new_flashnode) {
3334 goto exit_new_fnode;
3337 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3339 pr_err("%s could not find host no %u\n",
3340 __func__, ev->u.new_flashnode.host_no);
3345 index = transport->new_flashnode(shost, data, len);
3348 ev->r.new_flashnode_ret.flashnode_idx = index;
3353 scsi_host_put(shost);
3359 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3360 struct iscsi_uevent *ev)
3362 struct Scsi_Host *shost;
3363 struct iscsi_bus_flash_session *fnode_sess;
3367 if (!transport->del_flashnode) {
3369 goto exit_del_fnode;
3372 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3374 pr_err("%s could not find host no %u\n",
3375 __func__, ev->u.del_flashnode.host_no);
3380 idx = ev->u.del_flashnode.flashnode_idx;
3381 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3383 pr_err("%s could not find flashnode %u for host no %u\n",
3384 __func__, idx, ev->u.del_flashnode.host_no);
3389 err = transport->del_flashnode(fnode_sess);
3390 put_device(&fnode_sess->dev);
3393 scsi_host_put(shost);
3399 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3400 struct iscsi_uevent *ev)
3402 struct Scsi_Host *shost;
3403 struct iscsi_bus_flash_session *fnode_sess;
3404 struct iscsi_bus_flash_conn *fnode_conn;
3409 if (!transport->login_flashnode) {
3411 goto exit_login_fnode;
3414 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3416 pr_err("%s could not find host no %u\n",
3417 __func__, ev->u.login_flashnode.host_no);
3422 idx = ev->u.login_flashnode.flashnode_idx;
3423 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3425 pr_err("%s could not find flashnode %u for host no %u\n",
3426 __func__, idx, ev->u.login_flashnode.host_no);
3431 dev = iscsi_find_flashnode_conn(fnode_sess);
3437 fnode_conn = iscsi_dev_to_flash_conn(dev);
3438 err = transport->login_flashnode(fnode_sess, fnode_conn);
3442 put_device(&fnode_sess->dev);
3445 scsi_host_put(shost);
3451 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3452 struct iscsi_uevent *ev)
3454 struct Scsi_Host *shost;
3455 struct iscsi_bus_flash_session *fnode_sess;
3456 struct iscsi_bus_flash_conn *fnode_conn;
3461 if (!transport->logout_flashnode) {
3463 goto exit_logout_fnode;
3466 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3468 pr_err("%s could not find host no %u\n",
3469 __func__, ev->u.logout_flashnode.host_no);
3474 idx = ev->u.logout_flashnode.flashnode_idx;
3475 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3477 pr_err("%s could not find flashnode %u for host no %u\n",
3478 __func__, idx, ev->u.logout_flashnode.host_no);
3483 dev = iscsi_find_flashnode_conn(fnode_sess);
3489 fnode_conn = iscsi_dev_to_flash_conn(dev);
3491 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3495 put_device(&fnode_sess->dev);
3498 scsi_host_put(shost);
3504 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3505 struct iscsi_uevent *ev)
3507 struct Scsi_Host *shost;
3508 struct iscsi_cls_session *session;
3511 if (!transport->logout_flashnode_sid) {
3513 goto exit_logout_sid;
3516 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3518 pr_err("%s could not find host no %u\n",
3519 __func__, ev->u.logout_flashnode.host_no);
3524 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3526 pr_err("%s could not find session id %u\n",
3527 __func__, ev->u.logout_flashnode_sid.sid);
3532 err = transport->logout_flashnode_sid(session);
3535 scsi_host_put(shost);
3542 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3544 struct iscsi_uevent *ev = nlmsg_data(nlh);
3545 struct Scsi_Host *shost = NULL;
3546 struct iscsi_internal *priv;
3547 struct sk_buff *skbhost_stats;
3548 struct nlmsghdr *nlhhost_stats;
3549 struct iscsi_uevent *evhost_stats;
3550 int host_stats_size = 0;
3554 if (!transport->get_host_stats)
3557 priv = iscsi_if_transport_lookup(transport);
3561 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3562 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3564 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3566 pr_err("%s: failed. Could not find host no %u\n",
3567 __func__, ev->u.get_host_stats.host_no);
3574 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3575 if (!skbhost_stats) {
3576 pr_err("cannot deliver host stats: OOM\n");
3578 goto exit_host_stats;
3581 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3582 (len - sizeof(*nlhhost_stats)), 0);
3583 evhost_stats = nlmsg_data(nlhhost_stats);
3584 memset(evhost_stats, 0, sizeof(*evhost_stats));
3585 evhost_stats->transport_handle = iscsi_handle(transport);
3586 evhost_stats->type = nlh->nlmsg_type;
3587 evhost_stats->u.get_host_stats.host_no =
3588 ev->u.get_host_stats.host_no;
3589 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3590 memset(buf, 0, host_stats_size);
3592 err = transport->get_host_stats(shost, buf, host_stats_size);
3594 kfree_skb(skbhost_stats);
3595 goto exit_host_stats;
3598 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3599 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3600 nlhhost_stats->nlmsg_len = actual_size;
3602 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3604 } while (err < 0 && err != -ECONNREFUSED);
3607 scsi_host_put(shost);
3613 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3617 struct iscsi_uevent *ev = nlmsg_data(nlh);
3618 struct iscsi_transport *transport = NULL;
3619 struct iscsi_internal *priv;
3620 struct iscsi_cls_session *session;
3621 struct iscsi_cls_conn *conn;
3622 struct iscsi_endpoint *ep = NULL;
3624 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3625 *group = ISCSI_NL_GRP_UIP;
3627 *group = ISCSI_NL_GRP_ISCSID;
3629 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3632 transport = priv->iscsi_transport;
3634 if (!try_module_get(transport->owner))
3637 portid = NETLINK_CB(skb).portid;
3639 switch (nlh->nlmsg_type) {
3640 case ISCSI_UEVENT_CREATE_SESSION:
3641 err = iscsi_if_create_session(priv, ep, ev,
3643 ev->u.c_session.initial_cmdsn,
3644 ev->u.c_session.cmds_max,
3645 ev->u.c_session.queue_depth);
3647 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3648 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3654 err = iscsi_if_create_session(priv, ep, ev,
3656 ev->u.c_bound_session.initial_cmdsn,
3657 ev->u.c_bound_session.cmds_max,
3658 ev->u.c_bound_session.queue_depth);
3660 case ISCSI_UEVENT_DESTROY_SESSION:
3661 session = iscsi_session_lookup(ev->u.d_session.sid);
3664 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3667 transport->destroy_session(session);
3669 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3670 session = iscsi_session_lookup(ev->u.d_session.sid);
3673 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3676 unsigned long flags;
3678 /* Prevent this session from being found again */
3679 spin_lock_irqsave(&sesslock, flags);
3680 list_del_init(&session->sess_list);
3681 spin_unlock_irqrestore(&sesslock, flags);
3683 queue_work(iscsi_destroy_workq, &session->destroy_work);
3686 case ISCSI_UEVENT_UNBIND_SESSION:
3687 session = iscsi_session_lookup(ev->u.d_session.sid);
3689 scsi_queue_work(iscsi_session_to_shost(session),
3690 &session->unbind_work);
3694 case ISCSI_UEVENT_CREATE_CONN:
3695 err = iscsi_if_create_conn(transport, ev);
3697 case ISCSI_UEVENT_DESTROY_CONN:
3698 err = iscsi_if_destroy_conn(transport, ev);
3700 case ISCSI_UEVENT_BIND_CONN:
3701 session = iscsi_session_lookup(ev->u.b_conn.sid);
3702 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3704 if (conn && conn->ep)
3705 iscsi_if_ep_disconnect(transport, conn->ep->id);
3707 if (!session || !conn) {
3712 mutex_lock(&conn_mutex);
3713 ev->r.retcode = transport->bind_conn(session, conn,
3714 ev->u.b_conn.transport_eph,
3715 ev->u.b_conn.is_leading);
3716 mutex_unlock(&conn_mutex);
3718 if (ev->r.retcode || !transport->ep_connect)
3721 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3725 mutex_lock(&conn->ep_mutex);
3727 mutex_unlock(&conn->ep_mutex);
3729 iscsi_cls_conn_printk(KERN_ERR, conn,
3730 "Could not set ep conn "
3733 case ISCSI_UEVENT_SET_PARAM:
3734 err = iscsi_set_param(transport, ev);
3736 case ISCSI_UEVENT_START_CONN:
3737 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3739 mutex_lock(&conn_mutex);
3740 ev->r.retcode = transport->start_conn(conn);
3742 conn->state = ISCSI_CONN_UP;
3743 mutex_unlock(&conn_mutex);
3748 case ISCSI_UEVENT_STOP_CONN:
3749 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3751 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag);
3755 case ISCSI_UEVENT_SEND_PDU:
3756 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3758 mutex_lock(&conn_mutex);
3759 ev->r.retcode = transport->send_pdu(conn,
3760 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3761 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3762 ev->u.send_pdu.data_size);
3763 mutex_unlock(&conn_mutex);
3768 case ISCSI_UEVENT_GET_STATS:
3769 err = iscsi_if_get_stats(transport, nlh);
3771 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3772 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3773 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3774 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3775 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3777 case ISCSI_UEVENT_TGT_DSCVR:
3778 err = iscsi_tgt_dscvr(transport, ev);
3780 case ISCSI_UEVENT_SET_HOST_PARAM:
3781 err = iscsi_set_host_param(transport, ev);
3783 case ISCSI_UEVENT_PATH_UPDATE:
3784 err = iscsi_set_path(transport, ev);
3786 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3787 err = iscsi_set_iface_params(transport, ev,
3788 nlmsg_attrlen(nlh, sizeof(*ev)));
3790 case ISCSI_UEVENT_PING:
3791 err = iscsi_send_ping(transport, ev);
3793 case ISCSI_UEVENT_GET_CHAP:
3794 err = iscsi_get_chap(transport, nlh);
3796 case ISCSI_UEVENT_DELETE_CHAP:
3797 err = iscsi_delete_chap(transport, ev);
3799 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3800 err = iscsi_set_flashnode_param(transport, ev,
3804 case ISCSI_UEVENT_NEW_FLASHNODE:
3805 err = iscsi_new_flashnode(transport, ev,
3806 nlmsg_attrlen(nlh, sizeof(*ev)));
3808 case ISCSI_UEVENT_DEL_FLASHNODE:
3809 err = iscsi_del_flashnode(transport, ev);
3811 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3812 err = iscsi_login_flashnode(transport, ev);
3814 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3815 err = iscsi_logout_flashnode(transport, ev);
3817 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3818 err = iscsi_logout_flashnode_sid(transport, ev);
3820 case ISCSI_UEVENT_SET_CHAP:
3821 err = iscsi_set_chap(transport, ev,
3822 nlmsg_attrlen(nlh, sizeof(*ev)));
3824 case ISCSI_UEVENT_GET_HOST_STATS:
3825 err = iscsi_get_host_stats(transport, nlh);
3832 module_put(transport->owner);
3837 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3838 * Malformed skbs with wrong lengths or invalid creds are not processed.
3841 iscsi_if_rx(struct sk_buff *skb)
3843 u32 portid = NETLINK_CB(skb).portid;
3845 mutex_lock(&rx_queue_mutex);
3846 while (skb->len >= NLMSG_HDRLEN) {
3849 struct nlmsghdr *nlh;
3850 struct iscsi_uevent *ev;
3852 int retries = ISCSI_SEND_MAX_ALLOWED;
3854 nlh = nlmsg_hdr(skb);
3855 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3856 skb->len < nlh->nlmsg_len) {
3860 ev = nlmsg_data(nlh);
3861 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3862 if (rlen > skb->len)
3865 err = iscsi_if_recv_msg(skb, nlh, &group);
3867 ev->type = ISCSI_KEVENT_IF_ERROR;
3872 * special case for GET_STATS:
3873 * on success - sending reply and stats from
3874 * inside of if_recv_msg(),
3875 * on error - fall through.
3877 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3879 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3881 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3883 if (err == -EAGAIN && --retries < 0) {
3884 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3887 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3888 skb_pull(skb, rlen);
3890 mutex_unlock(&rx_queue_mutex);
3893 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3894 struct device_attribute dev_attr_##_prefix##_##_name = \
3895 __ATTR(_name,_mode,_show,_store)
3898 * iSCSI connection attrs
3900 #define iscsi_conn_attr_show(param) \
3902 show_conn_param_##param(struct device *dev, \
3903 struct device_attribute *attr, char *buf) \
3905 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3906 struct iscsi_transport *t = conn->transport; \
3907 return t->get_conn_param(conn, param, buf); \
3910 #define iscsi_conn_attr(field, param) \
3911 iscsi_conn_attr_show(param) \
3912 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3915 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3916 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3917 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3918 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3919 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3920 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3921 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3922 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3923 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3924 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3925 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3926 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3927 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3928 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3929 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3930 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3931 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3932 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3933 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3934 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3935 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3936 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3937 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3938 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3939 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3940 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3941 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3942 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3944 static const char *const connection_state_names[] = {
3945 [ISCSI_CONN_UP] = "up",
3946 [ISCSI_CONN_DOWN] = "down",
3947 [ISCSI_CONN_FAILED] = "failed"
3950 static ssize_t show_conn_state(struct device *dev,
3951 struct device_attribute *attr, char *buf)
3953 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
3954 const char *state = "unknown";
3956 if (conn->state >= 0 &&
3957 conn->state < ARRAY_SIZE(connection_state_names))
3958 state = connection_state_names[conn->state];
3960 return sprintf(buf, "%s\n", state);
3962 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
3965 #define iscsi_conn_ep_attr_show(param) \
3966 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3967 struct device_attribute *attr,\
3970 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3971 struct iscsi_transport *t = conn->transport; \
3972 struct iscsi_endpoint *ep; \
3976 * Need to make sure ep_disconnect does not free the LLD's \
3977 * interconnect resources while we are trying to read them. \
3979 mutex_lock(&conn->ep_mutex); \
3981 if (!ep && t->ep_connect) { \
3982 mutex_unlock(&conn->ep_mutex); \
3987 rc = t->get_ep_param(ep, param, buf); \
3989 rc = t->get_conn_param(conn, param, buf); \
3990 mutex_unlock(&conn->ep_mutex); \
3994 #define iscsi_conn_ep_attr(field, param) \
3995 iscsi_conn_ep_attr_show(param) \
3996 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3997 show_conn_ep_param_##param, NULL);
3999 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
4000 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
4002 static struct attribute *iscsi_conn_attrs[] = {
4003 &dev_attr_conn_max_recv_dlength.attr,
4004 &dev_attr_conn_max_xmit_dlength.attr,
4005 &dev_attr_conn_header_digest.attr,
4006 &dev_attr_conn_data_digest.attr,
4007 &dev_attr_conn_ifmarker.attr,
4008 &dev_attr_conn_ofmarker.attr,
4009 &dev_attr_conn_address.attr,
4010 &dev_attr_conn_port.attr,
4011 &dev_attr_conn_exp_statsn.attr,
4012 &dev_attr_conn_persistent_address.attr,
4013 &dev_attr_conn_persistent_port.attr,
4014 &dev_attr_conn_ping_tmo.attr,
4015 &dev_attr_conn_recv_tmo.attr,
4016 &dev_attr_conn_local_port.attr,
4017 &dev_attr_conn_statsn.attr,
4018 &dev_attr_conn_keepalive_tmo.attr,
4019 &dev_attr_conn_max_segment_size.attr,
4020 &dev_attr_conn_tcp_timestamp_stat.attr,
4021 &dev_attr_conn_tcp_wsf_disable.attr,
4022 &dev_attr_conn_tcp_nagle_disable.attr,
4023 &dev_attr_conn_tcp_timer_scale.attr,
4024 &dev_attr_conn_tcp_timestamp_enable.attr,
4025 &dev_attr_conn_fragment_disable.attr,
4026 &dev_attr_conn_ipv4_tos.attr,
4027 &dev_attr_conn_ipv6_traffic_class.attr,
4028 &dev_attr_conn_ipv6_flow_label.attr,
4029 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4030 &dev_attr_conn_tcp_xmit_wsf.attr,
4031 &dev_attr_conn_tcp_recv_wsf.attr,
4032 &dev_attr_conn_local_ipaddr.attr,
4033 &dev_attr_conn_state.attr,
4037 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4038 struct attribute *attr, int i)
4040 struct device *cdev = container_of(kobj, struct device, kobj);
4041 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4042 struct iscsi_transport *t = conn->transport;
4045 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4046 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4047 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4048 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4049 else if (attr == &dev_attr_conn_header_digest.attr)
4050 param = ISCSI_PARAM_HDRDGST_EN;
4051 else if (attr == &dev_attr_conn_data_digest.attr)
4052 param = ISCSI_PARAM_DATADGST_EN;
4053 else if (attr == &dev_attr_conn_ifmarker.attr)
4054 param = ISCSI_PARAM_IFMARKER_EN;
4055 else if (attr == &dev_attr_conn_ofmarker.attr)
4056 param = ISCSI_PARAM_OFMARKER_EN;
4057 else if (attr == &dev_attr_conn_address.attr)
4058 param = ISCSI_PARAM_CONN_ADDRESS;
4059 else if (attr == &dev_attr_conn_port.attr)
4060 param = ISCSI_PARAM_CONN_PORT;
4061 else if (attr == &dev_attr_conn_exp_statsn.attr)
4062 param = ISCSI_PARAM_EXP_STATSN;
4063 else if (attr == &dev_attr_conn_persistent_address.attr)
4064 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4065 else if (attr == &dev_attr_conn_persistent_port.attr)
4066 param = ISCSI_PARAM_PERSISTENT_PORT;
4067 else if (attr == &dev_attr_conn_ping_tmo.attr)
4068 param = ISCSI_PARAM_PING_TMO;
4069 else if (attr == &dev_attr_conn_recv_tmo.attr)
4070 param = ISCSI_PARAM_RECV_TMO;
4071 else if (attr == &dev_attr_conn_local_port.attr)
4072 param = ISCSI_PARAM_LOCAL_PORT;
4073 else if (attr == &dev_attr_conn_statsn.attr)
4074 param = ISCSI_PARAM_STATSN;
4075 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4076 param = ISCSI_PARAM_KEEPALIVE_TMO;
4077 else if (attr == &dev_attr_conn_max_segment_size.attr)
4078 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4079 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4080 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4081 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4082 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4083 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4084 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4085 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4086 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4087 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4088 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4089 else if (attr == &dev_attr_conn_fragment_disable.attr)
4090 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4091 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4092 param = ISCSI_PARAM_IPV4_TOS;
4093 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4094 param = ISCSI_PARAM_IPV6_TC;
4095 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4096 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4097 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4098 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4099 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4100 param = ISCSI_PARAM_TCP_XMIT_WSF;
4101 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4102 param = ISCSI_PARAM_TCP_RECV_WSF;
4103 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4104 param = ISCSI_PARAM_LOCAL_IPADDR;
4105 else if (attr == &dev_attr_conn_state.attr)
4108 WARN_ONCE(1, "Invalid conn attr");
4112 return t->attr_is_visible(ISCSI_PARAM, param);
4115 static struct attribute_group iscsi_conn_group = {
4116 .attrs = iscsi_conn_attrs,
4117 .is_visible = iscsi_conn_attr_is_visible,
4121 * iSCSI session attrs
4123 #define iscsi_session_attr_show(param, perm) \
4125 show_session_param_##param(struct device *dev, \
4126 struct device_attribute *attr, char *buf) \
4128 struct iscsi_cls_session *session = \
4129 iscsi_dev_to_session(dev->parent); \
4130 struct iscsi_transport *t = session->transport; \
4132 if (perm && !capable(CAP_SYS_ADMIN)) \
4134 return t->get_session_param(session, param, buf); \
4137 #define iscsi_session_attr(field, param, perm) \
4138 iscsi_session_attr_show(param, perm) \
4139 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4141 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4142 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4143 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4144 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4145 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4146 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4147 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4148 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4149 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4150 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4151 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4152 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4153 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4154 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4155 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4156 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4157 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4158 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4159 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4160 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4161 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4162 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4163 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4164 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4165 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4166 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4167 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4168 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4169 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4170 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4171 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4172 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4173 iscsi_session_attr(discovery_auth_optional,
4174 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4175 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4176 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4177 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4178 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4179 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4180 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4181 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4184 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4187 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4188 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4190 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4193 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4196 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4197 return sprintf(buf, "%d\n", session->creator);
4199 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4202 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4205 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4206 return sprintf(buf, "%d\n", session->target_id);
4208 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4209 show_priv_session_target_id, NULL);
4211 #define iscsi_priv_session_attr_show(field, format) \
4213 show_priv_session_##field(struct device *dev, \
4214 struct device_attribute *attr, char *buf) \
4216 struct iscsi_cls_session *session = \
4217 iscsi_dev_to_session(dev->parent); \
4218 if (session->field == -1) \
4219 return sprintf(buf, "off\n"); \
4220 return sprintf(buf, format"\n", session->field); \
4223 #define iscsi_priv_session_attr_store(field) \
4225 store_priv_session_##field(struct device *dev, \
4226 struct device_attribute *attr, \
4227 const char *buf, size_t count) \
4231 struct iscsi_cls_session *session = \
4232 iscsi_dev_to_session(dev->parent); \
4233 if ((session->state == ISCSI_SESSION_FREE) || \
4234 (session->state == ISCSI_SESSION_FAILED)) \
4236 if (strncmp(buf, "off", 3) == 0) { \
4237 session->field = -1; \
4238 session->field##_sysfs_override = true; \
4240 val = simple_strtoul(buf, &cp, 0); \
4241 if (*cp != '\0' && *cp != '\n') \
4243 session->field = val; \
4244 session->field##_sysfs_override = true; \
4249 #define iscsi_priv_session_rw_attr(field, format) \
4250 iscsi_priv_session_attr_show(field, format) \
4251 iscsi_priv_session_attr_store(field) \
4252 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4253 show_priv_session_##field, \
4254 store_priv_session_##field)
4256 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4258 static struct attribute *iscsi_session_attrs[] = {
4259 &dev_attr_sess_initial_r2t.attr,
4260 &dev_attr_sess_max_outstanding_r2t.attr,
4261 &dev_attr_sess_immediate_data.attr,
4262 &dev_attr_sess_first_burst_len.attr,
4263 &dev_attr_sess_max_burst_len.attr,
4264 &dev_attr_sess_data_pdu_in_order.attr,
4265 &dev_attr_sess_data_seq_in_order.attr,
4266 &dev_attr_sess_erl.attr,
4267 &dev_attr_sess_targetname.attr,
4268 &dev_attr_sess_tpgt.attr,
4269 &dev_attr_sess_password.attr,
4270 &dev_attr_sess_password_in.attr,
4271 &dev_attr_sess_username.attr,
4272 &dev_attr_sess_username_in.attr,
4273 &dev_attr_sess_fast_abort.attr,
4274 &dev_attr_sess_abort_tmo.attr,
4275 &dev_attr_sess_lu_reset_tmo.attr,
4276 &dev_attr_sess_tgt_reset_tmo.attr,
4277 &dev_attr_sess_ifacename.attr,
4278 &dev_attr_sess_initiatorname.attr,
4279 &dev_attr_sess_targetalias.attr,
4280 &dev_attr_sess_boot_root.attr,
4281 &dev_attr_sess_boot_nic.attr,
4282 &dev_attr_sess_boot_target.attr,
4283 &dev_attr_priv_sess_recovery_tmo.attr,
4284 &dev_attr_priv_sess_state.attr,
4285 &dev_attr_priv_sess_creator.attr,
4286 &dev_attr_sess_chap_out_idx.attr,
4287 &dev_attr_sess_chap_in_idx.attr,
4288 &dev_attr_priv_sess_target_id.attr,
4289 &dev_attr_sess_auto_snd_tgt_disable.attr,
4290 &dev_attr_sess_discovery_session.attr,
4291 &dev_attr_sess_portal_type.attr,
4292 &dev_attr_sess_chap_auth.attr,
4293 &dev_attr_sess_discovery_logout.attr,
4294 &dev_attr_sess_bidi_chap.attr,
4295 &dev_attr_sess_discovery_auth_optional.attr,
4296 &dev_attr_sess_def_time2wait.attr,
4297 &dev_attr_sess_def_time2retain.attr,
4298 &dev_attr_sess_isid.attr,
4299 &dev_attr_sess_tsid.attr,
4300 &dev_attr_sess_def_taskmgmt_tmo.attr,
4301 &dev_attr_sess_discovery_parent_idx.attr,
4302 &dev_attr_sess_discovery_parent_type.attr,
4306 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4307 struct attribute *attr, int i)
4309 struct device *cdev = container_of(kobj, struct device, kobj);
4310 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4311 struct iscsi_transport *t = session->transport;
4314 if (attr == &dev_attr_sess_initial_r2t.attr)
4315 param = ISCSI_PARAM_INITIAL_R2T_EN;
4316 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4317 param = ISCSI_PARAM_MAX_R2T;
4318 else if (attr == &dev_attr_sess_immediate_data.attr)
4319 param = ISCSI_PARAM_IMM_DATA_EN;
4320 else if (attr == &dev_attr_sess_first_burst_len.attr)
4321 param = ISCSI_PARAM_FIRST_BURST;
4322 else if (attr == &dev_attr_sess_max_burst_len.attr)
4323 param = ISCSI_PARAM_MAX_BURST;
4324 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4325 param = ISCSI_PARAM_PDU_INORDER_EN;
4326 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4327 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4328 else if (attr == &dev_attr_sess_erl.attr)
4329 param = ISCSI_PARAM_ERL;
4330 else if (attr == &dev_attr_sess_targetname.attr)
4331 param = ISCSI_PARAM_TARGET_NAME;
4332 else if (attr == &dev_attr_sess_tpgt.attr)
4333 param = ISCSI_PARAM_TPGT;
4334 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4335 param = ISCSI_PARAM_CHAP_IN_IDX;
4336 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4337 param = ISCSI_PARAM_CHAP_OUT_IDX;
4338 else if (attr == &dev_attr_sess_password.attr)
4339 param = ISCSI_PARAM_USERNAME;
4340 else if (attr == &dev_attr_sess_password_in.attr)
4341 param = ISCSI_PARAM_USERNAME_IN;
4342 else if (attr == &dev_attr_sess_username.attr)
4343 param = ISCSI_PARAM_PASSWORD;
4344 else if (attr == &dev_attr_sess_username_in.attr)
4345 param = ISCSI_PARAM_PASSWORD_IN;
4346 else if (attr == &dev_attr_sess_fast_abort.attr)
4347 param = ISCSI_PARAM_FAST_ABORT;
4348 else if (attr == &dev_attr_sess_abort_tmo.attr)
4349 param = ISCSI_PARAM_ABORT_TMO;
4350 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4351 param = ISCSI_PARAM_LU_RESET_TMO;
4352 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4353 param = ISCSI_PARAM_TGT_RESET_TMO;
4354 else if (attr == &dev_attr_sess_ifacename.attr)
4355 param = ISCSI_PARAM_IFACE_NAME;
4356 else if (attr == &dev_attr_sess_initiatorname.attr)
4357 param = ISCSI_PARAM_INITIATOR_NAME;
4358 else if (attr == &dev_attr_sess_targetalias.attr)
4359 param = ISCSI_PARAM_TARGET_ALIAS;
4360 else if (attr == &dev_attr_sess_boot_root.attr)
4361 param = ISCSI_PARAM_BOOT_ROOT;
4362 else if (attr == &dev_attr_sess_boot_nic.attr)
4363 param = ISCSI_PARAM_BOOT_NIC;
4364 else if (attr == &dev_attr_sess_boot_target.attr)
4365 param = ISCSI_PARAM_BOOT_TARGET;
4366 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4367 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4368 else if (attr == &dev_attr_sess_discovery_session.attr)
4369 param = ISCSI_PARAM_DISCOVERY_SESS;
4370 else if (attr == &dev_attr_sess_portal_type.attr)
4371 param = ISCSI_PARAM_PORTAL_TYPE;
4372 else if (attr == &dev_attr_sess_chap_auth.attr)
4373 param = ISCSI_PARAM_CHAP_AUTH_EN;
4374 else if (attr == &dev_attr_sess_discovery_logout.attr)
4375 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4376 else if (attr == &dev_attr_sess_bidi_chap.attr)
4377 param = ISCSI_PARAM_BIDI_CHAP_EN;
4378 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4379 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4380 else if (attr == &dev_attr_sess_def_time2wait.attr)
4381 param = ISCSI_PARAM_DEF_TIME2WAIT;
4382 else if (attr == &dev_attr_sess_def_time2retain.attr)
4383 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4384 else if (attr == &dev_attr_sess_isid.attr)
4385 param = ISCSI_PARAM_ISID;
4386 else if (attr == &dev_attr_sess_tsid.attr)
4387 param = ISCSI_PARAM_TSID;
4388 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4389 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4390 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4391 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4392 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4393 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4394 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4395 return S_IRUGO | S_IWUSR;
4396 else if (attr == &dev_attr_priv_sess_state.attr)
4398 else if (attr == &dev_attr_priv_sess_creator.attr)
4400 else if (attr == &dev_attr_priv_sess_target_id.attr)
4403 WARN_ONCE(1, "Invalid session attr");
4407 return t->attr_is_visible(ISCSI_PARAM, param);
4410 static struct attribute_group iscsi_session_group = {
4411 .attrs = iscsi_session_attrs,
4412 .is_visible = iscsi_session_attr_is_visible,
4418 #define iscsi_host_attr_show(param) \
4420 show_host_param_##param(struct device *dev, \
4421 struct device_attribute *attr, char *buf) \
4423 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4424 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4425 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4428 #define iscsi_host_attr(field, param) \
4429 iscsi_host_attr_show(param) \
4430 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4433 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4434 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4435 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4436 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4437 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4438 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4440 static struct attribute *iscsi_host_attrs[] = {
4441 &dev_attr_host_netdev.attr,
4442 &dev_attr_host_hwaddress.attr,
4443 &dev_attr_host_ipaddress.attr,
4444 &dev_attr_host_initiatorname.attr,
4445 &dev_attr_host_port_state.attr,
4446 &dev_attr_host_port_speed.attr,
4450 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4451 struct attribute *attr, int i)
4453 struct device *cdev = container_of(kobj, struct device, kobj);
4454 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4455 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4458 if (attr == &dev_attr_host_netdev.attr)
4459 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4460 else if (attr == &dev_attr_host_hwaddress.attr)
4461 param = ISCSI_HOST_PARAM_HWADDRESS;
4462 else if (attr == &dev_attr_host_ipaddress.attr)
4463 param = ISCSI_HOST_PARAM_IPADDRESS;
4464 else if (attr == &dev_attr_host_initiatorname.attr)
4465 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4466 else if (attr == &dev_attr_host_port_state.attr)
4467 param = ISCSI_HOST_PARAM_PORT_STATE;
4468 else if (attr == &dev_attr_host_port_speed.attr)
4469 param = ISCSI_HOST_PARAM_PORT_SPEED;
4471 WARN_ONCE(1, "Invalid host attr");
4475 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4478 static struct attribute_group iscsi_host_group = {
4479 .attrs = iscsi_host_attrs,
4480 .is_visible = iscsi_host_attr_is_visible,
4483 /* convert iscsi_port_speed values to ascii string name */
4484 static const struct {
4485 enum iscsi_port_speed value;
4487 } iscsi_port_speed_names[] = {
4488 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4489 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4490 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4491 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4492 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4493 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4494 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4497 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4500 char *speed = "Unknown!";
4501 struct iscsi_cls_host *ihost = shost->shost_data;
4502 uint32_t port_speed = ihost->port_speed;
4504 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4505 if (iscsi_port_speed_names[i].value & port_speed) {
4506 speed = iscsi_port_speed_names[i].name;
4512 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4514 /* convert iscsi_port_state values to ascii string name */
4515 static const struct {
4516 enum iscsi_port_state value;
4518 } iscsi_port_state_names[] = {
4519 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4520 {ISCSI_PORT_STATE_UP, "LINK UP" },
4523 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4526 char *state = "Unknown!";
4527 struct iscsi_cls_host *ihost = shost->shost_data;
4528 uint32_t port_state = ihost->port_state;
4530 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4531 if (iscsi_port_state_names[i].value & port_state) {
4532 state = iscsi_port_state_names[i].name;
4538 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4540 static int iscsi_session_match(struct attribute_container *cont,
4543 struct iscsi_cls_session *session;
4544 struct Scsi_Host *shost;
4545 struct iscsi_internal *priv;
4547 if (!iscsi_is_session_dev(dev))
4550 session = iscsi_dev_to_session(dev);
4551 shost = iscsi_session_to_shost(session);
4552 if (!shost->transportt)
4555 priv = to_iscsi_internal(shost->transportt);
4556 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4559 return &priv->session_cont.ac == cont;
4562 static int iscsi_conn_match(struct attribute_container *cont,
4565 struct iscsi_cls_session *session;
4566 struct iscsi_cls_conn *conn;
4567 struct Scsi_Host *shost;
4568 struct iscsi_internal *priv;
4570 if (!iscsi_is_conn_dev(dev))
4573 conn = iscsi_dev_to_conn(dev);
4574 session = iscsi_dev_to_session(conn->dev.parent);
4575 shost = iscsi_session_to_shost(session);
4577 if (!shost->transportt)
4580 priv = to_iscsi_internal(shost->transportt);
4581 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4584 return &priv->conn_cont.ac == cont;
4587 static int iscsi_host_match(struct attribute_container *cont,
4590 struct Scsi_Host *shost;
4591 struct iscsi_internal *priv;
4593 if (!scsi_is_host_device(dev))
4596 shost = dev_to_shost(dev);
4597 if (!shost->transportt ||
4598 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4601 priv = to_iscsi_internal(shost->transportt);
4602 return &priv->t.host_attrs.ac == cont;
4605 struct scsi_transport_template *
4606 iscsi_register_transport(struct iscsi_transport *tt)
4608 struct iscsi_internal *priv;
4609 unsigned long flags;
4614 priv = iscsi_if_transport_lookup(tt);
4618 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4621 INIT_LIST_HEAD(&priv->list);
4622 priv->iscsi_transport = tt;
4623 priv->t.user_scan = iscsi_user_scan;
4624 priv->t.create_work_queue = 1;
4626 priv->dev.class = &iscsi_transport_class;
4627 dev_set_name(&priv->dev, "%s", tt->name);
4628 err = device_register(&priv->dev);
4632 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4634 goto unregister_dev;
4636 /* host parameters */
4637 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4638 priv->t.host_attrs.ac.match = iscsi_host_match;
4639 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4640 priv->t.host_size = sizeof(struct iscsi_cls_host);
4641 transport_container_register(&priv->t.host_attrs);
4643 /* connection parameters */
4644 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4645 priv->conn_cont.ac.match = iscsi_conn_match;
4646 priv->conn_cont.ac.grp = &iscsi_conn_group;
4647 transport_container_register(&priv->conn_cont);
4649 /* session parameters */
4650 priv->session_cont.ac.class = &iscsi_session_class.class;
4651 priv->session_cont.ac.match = iscsi_session_match;
4652 priv->session_cont.ac.grp = &iscsi_session_group;
4653 transport_container_register(&priv->session_cont);
4655 spin_lock_irqsave(&iscsi_transport_lock, flags);
4656 list_add(&priv->list, &iscsi_transports);
4657 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4659 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4663 device_unregister(&priv->dev);
4669 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4671 int iscsi_unregister_transport(struct iscsi_transport *tt)
4673 struct iscsi_internal *priv;
4674 unsigned long flags;
4678 mutex_lock(&rx_queue_mutex);
4680 priv = iscsi_if_transport_lookup(tt);
4683 spin_lock_irqsave(&iscsi_transport_lock, flags);
4684 list_del(&priv->list);
4685 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4687 transport_container_unregister(&priv->conn_cont);
4688 transport_container_unregister(&priv->session_cont);
4689 transport_container_unregister(&priv->t.host_attrs);
4691 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4692 device_unregister(&priv->dev);
4693 mutex_unlock(&rx_queue_mutex);
4697 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4699 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4700 struct device *dev, const char *fmt, ...)
4702 struct va_format vaf;
4705 va_start(args, fmt);
4711 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4713 static __init int iscsi_transport_init(void)
4716 struct netlink_kernel_cfg cfg = {
4718 .input = iscsi_if_rx,
4720 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4721 ISCSI_TRANSPORT_VERSION);
4723 atomic_set(&iscsi_session_nr, 0);
4725 err = class_register(&iscsi_transport_class);
4729 err = class_register(&iscsi_endpoint_class);
4731 goto unregister_transport_class;
4733 err = class_register(&iscsi_iface_class);
4735 goto unregister_endpoint_class;
4737 err = transport_class_register(&iscsi_host_class);
4739 goto unregister_iface_class;
4741 err = transport_class_register(&iscsi_connection_class);
4743 goto unregister_host_class;
4745 err = transport_class_register(&iscsi_session_class);
4747 goto unregister_conn_class;
4749 err = bus_register(&iscsi_flashnode_bus);
4751 goto unregister_session_class;
4753 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4756 goto unregister_flashnode_bus;
4759 iscsi_eh_timer_workq = alloc_workqueue("%s",
4760 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
4762 if (!iscsi_eh_timer_workq) {
4767 iscsi_destroy_workq = alloc_workqueue("%s",
4768 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
4769 1, "iscsi_destroy");
4770 if (!iscsi_destroy_workq) {
4778 destroy_workqueue(iscsi_eh_timer_workq);
4780 netlink_kernel_release(nls);
4781 unregister_flashnode_bus:
4782 bus_unregister(&iscsi_flashnode_bus);
4783 unregister_session_class:
4784 transport_class_unregister(&iscsi_session_class);
4785 unregister_conn_class:
4786 transport_class_unregister(&iscsi_connection_class);
4787 unregister_host_class:
4788 transport_class_unregister(&iscsi_host_class);
4789 unregister_iface_class:
4790 class_unregister(&iscsi_iface_class);
4791 unregister_endpoint_class:
4792 class_unregister(&iscsi_endpoint_class);
4793 unregister_transport_class:
4794 class_unregister(&iscsi_transport_class);
4798 static void __exit iscsi_transport_exit(void)
4800 destroy_workqueue(iscsi_destroy_workq);
4801 destroy_workqueue(iscsi_eh_timer_workq);
4802 netlink_kernel_release(nls);
4803 bus_unregister(&iscsi_flashnode_bus);
4804 transport_class_unregister(&iscsi_connection_class);
4805 transport_class_unregister(&iscsi_session_class);
4806 transport_class_unregister(&iscsi_host_class);
4807 class_unregister(&iscsi_endpoint_class);
4808 class_unregister(&iscsi_iface_class);
4809 class_unregister(&iscsi_transport_class);
4812 module_init(iscsi_transport_init);
4813 module_exit(iscsi_transport_exit);
4815 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4816 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4817 "Alex Aizman <itn780@yahoo.com>");
4818 MODULE_DESCRIPTION("iSCSI Transport Interface");
4819 MODULE_LICENSE("GPL");
4820 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4821 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);