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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_iscsi.c
blob2e68c0a876986d3733412bc968e85731d2501432
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * iSCSI transport class definitions
4 *
5 * Copyright (C) IBM Corporation, 2004
6 * Copyright (C) Mike Christie, 2004 - 2005
7 * Copyright (C) Dmitry Yusupov, 2004 - 2005
8 * Copyright (C) Alex Aizman, 2004 - 2005
9 */
10 #include <linux/module.h>
11 #include <linux/mutex.h>
12 #include <linux/slab.h>
13 #include <linux/bsg-lib.h>
14 #include <linux/idr.h>
15 #include <net/tcp.h>
16 #include <scsi/scsi.h>
17 #include <scsi/scsi_host.h>
18 #include <scsi/scsi_device.h>
19 #include <scsi/scsi_transport.h>
20 #include <scsi/scsi_transport_iscsi.h>
21 #include <scsi/iscsi_if.h>
22 #include <scsi/scsi_cmnd.h>
23 #include <scsi/scsi_bsg_iscsi.h>
24
25 #define ISCSI_TRANSPORT_VERSION "2.0-870"
26
27 #define ISCSI_SEND_MAX_ALLOWED 10
28
29 #define CREATE_TRACE_POINTS
30 #include <trace/events/iscsi.h>
31
32 /*
33 * Export tracepoint symbols to be used by other modules.
34 */
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);
40
41 static int dbg_session;
42 module_param_named(debug_session, dbg_session, int,
43 S_IRUGO | S_IWUSR);
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 "
47 "is off.");
48
49 static int dbg_conn;
50 module_param_named(debug_conn, dbg_conn, int,
51 S_IRUGO | S_IWUSR);
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 "
55 "is off.");
56
57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
58 do { \
59 if (dbg_session) \
60 iscsi_cls_session_printk(KERN_INFO, _session, \
61 "%s: " dbg_fmt, \
62 __func__, ##arg); \
63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \
64 &(_session)->dev, \
65 "%s " dbg_fmt, __func__, ##arg); \
66 } while (0);
67
68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
69 do { \
70 if (dbg_conn) \
71 iscsi_cls_conn_printk(KERN_INFO, _conn, \
72 "%s: " dbg_fmt, \
73 __func__, ##arg); \
74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \
75 &(_conn)->dev, \
76 "%s " dbg_fmt, __func__, ##arg); \
77 } while (0);
78
79 struct iscsi_internal {
80 struct scsi_transport_template t;
81 struct iscsi_transport *iscsi_transport;
82 struct list_head list;
83 struct device dev;
84
85 struct transport_container conn_cont;
86 struct transport_container session_cont;
87 };
88
89 /* Worker to perform connection failure on unresponsive connections
90 * completely in kernel space.
91 */
92 static void stop_conn_work_fn(struct work_struct *work);
93 static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);
94
95 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
96 static struct workqueue_struct *iscsi_eh_timer_workq;
97
98 static struct workqueue_struct *iscsi_destroy_workq;
99
100 static DEFINE_IDA(iscsi_sess_ida);
101 /*
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.
105 */
106 static LIST_HEAD(iscsi_transports);
107 static DEFINE_SPINLOCK(iscsi_transport_lock);
108
109 #define to_iscsi_internal(tmpl) \
110 container_of(tmpl, struct iscsi_internal, t)
111
112 #define dev_to_iscsi_internal(_dev) \
113 container_of(_dev, struct iscsi_internal, dev)
114
115 static void iscsi_transport_release(struct device *dev)
116 {
117 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
118 kfree(priv);
119 }
120
121 /*
122 * iscsi_transport_class represents the iscsi_transports that are
123 * registered.
124 */
125 static struct class iscsi_transport_class = {
126 .name = "iscsi_transport",
127 .dev_release = iscsi_transport_release,
128 };
129
130 static ssize_t
131 show_transport_handle(struct device *dev, struct device_attribute *attr,
132 char *buf)
133 {
134 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
135 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
136 }
137 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
138
139 #define show_transport_attr(name, format) \
140 static ssize_t \
141 show_transport_##name(struct device *dev, \
142 struct device_attribute *attr,char *buf) \
143 { \
144 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
145 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
146 } \
147 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
148
149 show_transport_attr(caps, "0x%x");
150
151 static struct attribute *iscsi_transport_attrs[] = {
152 &dev_attr_handle.attr,
153 &dev_attr_caps.attr,
154 NULL,
155 };
156
157 static struct attribute_group iscsi_transport_group = {
158 .attrs = iscsi_transport_attrs,
159 };
160
161 /*
162 * iSCSI endpoint attrs
163 */
164 #define iscsi_dev_to_endpoint(_dev) \
165 container_of(_dev, struct iscsi_endpoint, dev)
166
167 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
168 struct device_attribute dev_attr_##_prefix##_##_name = \
169 __ATTR(_name,_mode,_show,_store)
170
171 static void iscsi_endpoint_release(struct device *dev)
172 {
173 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
174 kfree(ep);
175 }
176
177 static struct class iscsi_endpoint_class = {
178 .name = "iscsi_endpoint",
179 .dev_release = iscsi_endpoint_release,
180 };
181
182 static ssize_t
183 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
184 {
185 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
186 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
187 }
188 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
189
190 static struct attribute *iscsi_endpoint_attrs[] = {
191 &dev_attr_ep_handle.attr,
192 NULL,
193 };
194
195 static struct attribute_group iscsi_endpoint_group = {
196 .attrs = iscsi_endpoint_attrs,
197 };
198
199 #define ISCSI_MAX_EPID -1
200
201 static int iscsi_match_epid(struct device *dev, const void *data)
202 {
203 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
204 const uint64_t *epid = data;
205
206 return *epid == ep->id;
207 }
208
209 struct iscsi_endpoint *
210 iscsi_create_endpoint(int dd_size)
211 {
212 struct device *dev;
213 struct iscsi_endpoint *ep;
214 uint64_t id;
215 int err;
216
217 for (id = 1; id < ISCSI_MAX_EPID; id++) {
218 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
219 iscsi_match_epid);
220 if (!dev)
221 break;
222 else
223 put_device(dev);
224 }
225 if (id == ISCSI_MAX_EPID) {
226 printk(KERN_ERR "Too many connections. Max supported %u\n",
227 ISCSI_MAX_EPID - 1);
228 return NULL;
229 }
230
231 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
232 if (!ep)
233 return NULL;
234
235 ep->id = id;
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);
239 if (err)
240 goto free_ep;
241
242 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
243 if (err)
244 goto unregister_dev;
245
246 if (dd_size)
247 ep->dd_data = &ep[1];
248 return ep;
249
250 unregister_dev:
251 device_unregister(&ep->dev);
252 return NULL;
253
254 free_ep:
255 kfree(ep);
256 return NULL;
257 }
258 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
259
260 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
261 {
262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
263 device_unregister(&ep->dev);
264 }
265 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
266
267 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
268 {
269 struct iscsi_endpoint *ep;
270 struct device *dev;
271
272 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
273 iscsi_match_epid);
274 if (!dev)
275 return NULL;
276
277 ep = iscsi_dev_to_endpoint(dev);
278 /*
279 * we can drop this now because the interface will prevent
280 * removals and lookups from racing.
281 */
282 put_device(dev);
283 return ep;
284 }
285 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
286
287 /*
288 * Interface to display network param to sysfs
289 */
290
291 static void iscsi_iface_release(struct device *dev)
292 {
293 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
294 struct device *parent = iface->dev.parent;
295
296 kfree(iface);
297 put_device(parent);
298 }
299
300
301 static struct class iscsi_iface_class = {
302 .name = "iscsi_iface",
303 .dev_release = iscsi_iface_release,
304 };
305
306 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
307 struct device_attribute dev_attr_##_prefix##_##_name = \
308 __ATTR(_name, _mode, _show, _store)
309
310 /* iface attrs show */
311 #define iscsi_iface_attr_show(type, name, param_type, param) \
312 static ssize_t \
313 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
314 char *buf) \
315 { \
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); \
319 } \
320
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);
324
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);
328
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);
359
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);
390
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);
408
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);
432
433 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
434 struct attribute *attr, int i)
435 {
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;
439 int param;
440 int param_type;
441
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;
517 else if (attr ==
518 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
519 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
520 else if (attr ==
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;
529 else if (attr ==
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;
534 else if (attr ==
535 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
536 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
537 else if (attr ==
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;
542 else if (attr ==
543 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
544 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
545 else if (attr ==
546 &dev_attr_ipv4_iface_fragment_disable.attr)
547 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
548 else if (attr ==
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;
553 else
554 return 0;
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;
570 else if (attr ==
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;
591 else
592 return 0;
593 } else {
594 WARN_ONCE(1, "Invalid iface attr");
595 return 0;
596 }
597
598 switch (param) {
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;
618 break;
619 default:
620 param_type = ISCSI_NET_PARAM;
621 }
622
623 return t->attr_is_visible(param_type, param);
624 }
625
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,
695 NULL,
696 };
697
698 static struct attribute_group iscsi_iface_group = {
699 .attrs = iscsi_iface_attrs,
700 .is_visible = iscsi_iface_attr_is_visible,
701 };
702
703 /* convert iscsi_ipaddress_state values to ascii string name */
704 static const struct {
705 enum iscsi_ipaddress_state value;
706 char *name;
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" },
715 };
716
717 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
718 {
719 int i;
720 char *state = NULL;
721
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;
725 break;
726 }
727 }
728 return state;
729 }
730 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
731
732 /* convert iscsi_router_state values to ascii string name */
733 static const struct {
734 enum iscsi_router_state value;
735 char *name;
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" },
741 };
742
743 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
744 {
745 int i;
746 char *state = NULL;
747
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;
751 break;
752 }
753 }
754 return state;
755 }
756 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
757
758 struct iscsi_iface *
759 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
760 uint32_t iface_type, uint32_t iface_num, int dd_size)
761 {
762 struct iscsi_iface *iface;
763 int err;
764
765 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
766 if (!iface)
767 return NULL;
768
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,
778 iface_num);
779 else
780 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
781 iface_num);
782
783 err = device_register(&iface->dev);
784 if (err)
785 goto free_iface;
786
787 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
788 if (err)
789 goto unreg_iface;
790
791 if (dd_size)
792 iface->dd_data = &iface[1];
793 return iface;
794
795 unreg_iface:
796 device_unregister(&iface->dev);
797 return NULL;
798
799 free_iface:
800 put_device(iface->dev.parent);
801 kfree(iface);
802 return NULL;
803 }
804 EXPORT_SYMBOL_GPL(iscsi_create_iface);
805
806 void iscsi_destroy_iface(struct iscsi_iface *iface)
807 {
808 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
809 device_unregister(&iface->dev);
810 }
811 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
812
813 /*
814 * Interface to display flash node params to sysfs
815 */
816
817 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
818 struct device_attribute dev_attr_##_prefix##_##_name = \
819 __ATTR(_name, _mode, _show, _store)
820
821 /* flash node session attrs show */
822 #define iscsi_flashnode_sess_attr_show(type, name, param) \
823 static ssize_t \
824 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
825 char *buf) \
826 { \
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); \
831 } \
832
833
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);
838
839 /* Flash node session attributes */
840
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);
884
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,
919 NULL,
920 };
921
922 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
923 struct attribute *attr,
924 int i)
925 {
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;
930 int param;
931
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;
998 } else {
999 WARN_ONCE(1, "Invalid flashnode session attr");
1000 return 0;
1001 }
1002
1003 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1004 }
1005
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,
1009 };
1010
1011 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1012 &iscsi_flashnode_sess_attr_group,
1013 NULL,
1014 };
1015
1016 static void iscsi_flashnode_sess_release(struct device *dev)
1017 {
1018 struct iscsi_bus_flash_session *fnode_sess =
1019 iscsi_dev_to_flash_session(dev);
1020
1021 kfree(fnode_sess->targetname);
1022 kfree(fnode_sess->targetalias);
1023 kfree(fnode_sess->portal_type);
1024 kfree(fnode_sess);
1025 }
1026
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,
1031 };
1032
1033 /* flash node connection attrs show */
1034 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1035 static ssize_t \
1036 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1037 char *buf) \
1038 { \
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); \
1044 } \
1045
1046
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);
1051
1052 /* Flash node connection attributes */
1053
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);
1093
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,
1121 NULL,
1122 };
1123
1124 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1125 struct attribute *attr,
1126 int i)
1127 {
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;
1131 int param;
1132
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;
1185 } else {
1186 WARN_ONCE(1, "Invalid flashnode connection attr");
1187 return 0;
1188 }
1189
1190 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1191 }
1192
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,
1196 };
1197
1198 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1199 &iscsi_flashnode_conn_attr_group,
1200 NULL,
1201 };
1202
1203 static void iscsi_flashnode_conn_release(struct device *dev)
1204 {
1205 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1206
1207 kfree(fnode_conn->ipaddress);
1208 kfree(fnode_conn->redirect_ipaddr);
1209 kfree(fnode_conn->link_local_ipv6_addr);
1210 kfree(fnode_conn);
1211 }
1212
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,
1217 };
1218
1219 static struct bus_type iscsi_flashnode_bus;
1220
1221 int iscsi_flashnode_bus_match(struct device *dev,
1222 struct device_driver *drv)
1223 {
1224 if (dev->bus == &iscsi_flashnode_bus)
1225 return 1;
1226 return 0;
1227 }
1228 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1229
1230 static struct bus_type iscsi_flashnode_bus = {
1231 .name = "iscsi_flashnode",
1232 .match = &iscsi_flashnode_bus_match,
1233 };
1234
1235 /**
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
1241 *
1242 * Adds a sysfs entry for the flashnode session attributes
1243 *
1244 * Returns:
1245 * pointer to allocated flashnode sess on success
1246 * %NULL on failure
1247 */
1248 struct iscsi_bus_flash_session *
1249 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1250 struct iscsi_transport *transport,
1251 int dd_size)
1252 {
1253 struct iscsi_bus_flash_session *fnode_sess;
1254 int err;
1255
1256 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1257 if (!fnode_sess)
1258 return NULL;
1259
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);
1267
1268 err = device_register(&fnode_sess->dev);
1269 if (err)
1270 goto free_fnode_sess;
1271
1272 if (dd_size)
1273 fnode_sess->dd_data = &fnode_sess[1];
1274
1275 return fnode_sess;
1276
1277 free_fnode_sess:
1278 kfree(fnode_sess);
1279 return NULL;
1280 }
1281 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1282
1283 /**
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
1289 *
1290 * Adds a sysfs entry for the flashnode connection attributes
1291 *
1292 * Returns:
1293 * pointer to allocated flashnode conn on success
1294 * %NULL on failure
1295 */
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,
1300 int dd_size)
1301 {
1302 struct iscsi_bus_flash_conn *fnode_conn;
1303 int err;
1304
1305 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1306 if (!fnode_conn)
1307 return NULL;
1308
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);
1315
1316 err = device_register(&fnode_conn->dev);
1317 if (err)
1318 goto free_fnode_conn;
1319
1320 if (dd_size)
1321 fnode_conn->dd_data = &fnode_conn[1];
1322
1323 return fnode_conn;
1324
1325 free_fnode_conn:
1326 kfree(fnode_conn);
1327 return NULL;
1328 }
1329 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1330
1331 /**
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
1335 *
1336 * Verifies if the passed device is flashnode conn device
1337 *
1338 * Returns:
1339 * 1 on success
1340 * 0 on failure
1341 */
1342 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1343 {
1344 return dev->bus == &iscsi_flashnode_bus;
1345 }
1346
1347 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1348 {
1349 device_unregister(&fnode_conn->dev);
1350 return 0;
1351 }
1352
1353 static int flashnode_match_index(struct device *dev, void *data)
1354 {
1355 struct iscsi_bus_flash_session *fnode_sess = NULL;
1356 int ret = 0;
1357
1358 if (!iscsi_flashnode_bus_match(dev, NULL))
1359 goto exit_match_index;
1360
1361 fnode_sess = iscsi_dev_to_flash_session(dev);
1362 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1363
1364 exit_match_index:
1365 return ret;
1366 }
1367
1368 /**
1369 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1370 * @shost: pointer to host data
1371 * @idx: index to match
1372 *
1373 * Finds the flashnode session object for the passed index
1374 *
1375 * Returns:
1376 * pointer to found flashnode session object on success
1377 * %NULL on failure
1378 */
1379 static struct iscsi_bus_flash_session *
1380 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1381 {
1382 struct iscsi_bus_flash_session *fnode_sess = NULL;
1383 struct device *dev;
1384
1385 dev = device_find_child(&shost->shost_gendev, &idx,
1386 flashnode_match_index);
1387 if (dev)
1388 fnode_sess = iscsi_dev_to_flash_session(dev);
1389
1390 return fnode_sess;
1391 }
1392
1393 /**
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
1398 *
1399 * Finds the flashnode session object comparing the data passed using logic
1400 * defined in passed function pointer
1401 *
1402 * Returns:
1403 * pointer to found flashnode session device object on success
1404 * %NULL on failure
1405 */
1406 struct device *
1407 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1408 int (*fn)(struct device *dev, void *data))
1409 {
1410 return device_find_child(&shost->shost_gendev, data, fn);
1411 }
1412 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1413
1414 /**
1415 * iscsi_find_flashnode_conn - finds flashnode connection entry
1416 * @fnode_sess: pointer to parent flashnode session entry
1417 *
1418 * Finds the flashnode connection object comparing the data passed using logic
1419 * defined in passed function pointer
1420 *
1421 * Returns:
1422 * pointer to found flashnode connection device object on success
1423 * %NULL on failure
1424 */
1425 struct device *
1426 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1427 {
1428 return device_find_child(&fnode_sess->dev, NULL,
1429 iscsi_is_flashnode_conn_dev);
1430 }
1431 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1432
1433 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1434 {
1435 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1436 return 0;
1437
1438 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1439 }
1440
1441 /**
1442 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1443 * @fnode_sess: pointer to flashnode session entry to be destroyed
1444 *
1445 * Deletes the flashnode session entry and all children flashnode connection
1446 * entries from sysfs
1447 */
1448 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1449 {
1450 int err;
1451
1452 err = device_for_each_child(&fnode_sess->dev, NULL,
1453 iscsi_iter_destroy_flashnode_conn_fn);
1454 if (err)
1455 pr_err("Could not delete all connections for %s. Error %d.\n",
1456 fnode_sess->dev.kobj.name, err);
1457
1458 device_unregister(&fnode_sess->dev);
1459 }
1460 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1461
1462 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1463 {
1464 if (!iscsi_flashnode_bus_match(dev, NULL))
1465 return 0;
1466
1467 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1468 return 0;
1469 }
1470
1471 /**
1472 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1473 * @shost: pointer to host data
1474 *
1475 * Destroys all the flashnode session entries and all corresponding children
1476 * flashnode connection entries from sysfs
1477 */
1478 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1479 {
1480 device_for_each_child(&shost->shost_gendev, NULL,
1481 iscsi_iter_destroy_flashnode_fn);
1482 }
1483 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1484
1485 /*
1486 * BSG support
1487 */
1488 /**
1489 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1490 * @job: bsg job to be processed
1491 */
1492 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1493 {
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 */
1499 int ret;
1500
1501 /* check if we have the msgcode value at least */
1502 if (job->request_len < sizeof(uint32_t)) {
1503 ret = -ENOMSG;
1504 goto fail_host_msg;
1505 }
1506
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)) {
1514 ret = -ESRCH;
1515 goto fail_host_msg;
1516 }
1517 break;
1518 default:
1519 ret = -EBADR;
1520 goto fail_host_msg;
1521 }
1522
1523 /* check if we really have all the request data needed */
1524 if (job->request_len < cmdlen) {
1525 ret = -ENOMSG;
1526 goto fail_host_msg;
1527 }
1528
1529 ret = i->iscsi_transport->bsg_request(job);
1530 if (!ret)
1531 return 0;
1532
1533 fail_host_msg:
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);
1540 return 0;
1541 }
1542
1543 /**
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
1547 */
1548 static int
1549 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1550 {
1551 struct device *dev = &shost->shost_gendev;
1552 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1553 struct request_queue *q;
1554 char bsg_name[20];
1555
1556 if (!i->iscsi_transport->bsg_request)
1557 return -ENOTSUPP;
1558
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);
1561 if (IS_ERR(q)) {
1562 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1563 "initialize - no request queue\n");
1564 return PTR_ERR(q);
1565 }
1566 __scsi_init_queue(shost, q);
1567
1568 ihost->bsg_q = q;
1569 return 0;
1570 }
1571
1572 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1573 struct device *cdev)
1574 {
1575 struct Scsi_Host *shost = dev_to_shost(dev);
1576 struct iscsi_cls_host *ihost = shost->shost_data;
1577
1578 memset(ihost, 0, sizeof(*ihost));
1579 atomic_set(&ihost->nr_scans, 0);
1580 mutex_init(&ihost->mutex);
1581
1582 iscsi_bsg_host_add(shost, ihost);
1583 /* ignore any bsg add error - we just can't do sgio */
1584
1585 return 0;
1586 }
1587
1588 static int iscsi_remove_host(struct transport_container *tc,
1589 struct device *dev, struct device *cdev)
1590 {
1591 struct Scsi_Host *shost = dev_to_shost(dev);
1592 struct iscsi_cls_host *ihost = shost->shost_data;
1593
1594 bsg_remove_queue(ihost->bsg_q);
1595 return 0;
1596 }
1597
1598 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1599 "iscsi_host",
1600 iscsi_setup_host,
1601 iscsi_remove_host,
1602 NULL);
1603
1604 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1605 "iscsi_session",
1606 NULL,
1607 NULL,
1608 NULL);
1609
1610 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1611 "iscsi_connection",
1612 NULL,
1613 NULL,
1614 NULL);
1615
1616 static struct sock *nls;
1617 static DEFINE_MUTEX(rx_queue_mutex);
1618
1619 /*
1620 * conn_mutex protects the {start,bind,stop,destroy}_conn from racing
1621 * against the kernel stop_connection recovery mechanism
1622 */
1623 static DEFINE_MUTEX(conn_mutex);
1624
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);
1630
1631 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1632 {
1633 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1634 return sess->sid;
1635 }
1636
1637 /*
1638 * Returns the matching session to a given sid
1639 */
1640 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1641 {
1642 unsigned long flags;
1643 struct iscsi_cls_session *sess;
1644
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);
1649 return sess;
1650 }
1651 }
1652 spin_unlock_irqrestore(&sesslock, flags);
1653 return NULL;
1654 }
1655
1656 /*
1657 * Returns the matching connection to a given sid / cid tuple
1658 */
1659 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1660 {
1661 unsigned long flags;
1662 struct iscsi_cls_conn *conn;
1663
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);
1668 return conn;
1669 }
1670 }
1671 spin_unlock_irqrestore(&connlock, flags);
1672 return NULL;
1673 }
1674
1675 /*
1676 * The following functions can be used by LLDs that allocate
1677 * their own scsi_hosts or by software iscsi LLDs
1678 */
1679 static struct {
1680 int value;
1681 char *name;
1682 } iscsi_session_state_names[] = {
1683 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1684 { ISCSI_SESSION_FAILED, "FAILED" },
1685 { ISCSI_SESSION_FREE, "FREE" },
1686 };
1687
1688 static const char *iscsi_session_state_name(int state)
1689 {
1690 int i;
1691 char *name = NULL;
1692
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;
1696 break;
1697 }
1698 }
1699 return name;
1700 }
1701
1702 int iscsi_session_chkready(struct iscsi_cls_session *session)
1703 {
1704 unsigned long flags;
1705 int err;
1706
1707 spin_lock_irqsave(&session->lock, flags);
1708 switch (session->state) {
1709 case ISCSI_SESSION_LOGGED_IN:
1710 err = 0;
1711 break;
1712 case ISCSI_SESSION_FAILED:
1713 err = DID_IMM_RETRY << 16;
1714 break;
1715 case ISCSI_SESSION_FREE:
1716 err = DID_TRANSPORT_FAILFAST << 16;
1717 break;
1718 default:
1719 err = DID_NO_CONNECT << 16;
1720 break;
1721 }
1722 spin_unlock_irqrestore(&session->lock, flags);
1723 return err;
1724 }
1725 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1726
1727 int iscsi_is_session_online(struct iscsi_cls_session *session)
1728 {
1729 unsigned long flags;
1730 int ret = 0;
1731
1732 spin_lock_irqsave(&session->lock, flags);
1733 if (session->state == ISCSI_SESSION_LOGGED_IN)
1734 ret = 1;
1735 spin_unlock_irqrestore(&session->lock, flags);
1736 return ret;
1737 }
1738 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1739
1740 static void iscsi_session_release(struct device *dev)
1741 {
1742 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1743 struct Scsi_Host *shost;
1744
1745 shost = iscsi_session_to_shost(session);
1746 scsi_host_put(shost);
1747 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1748 kfree(session);
1749 }
1750
1751 int iscsi_is_session_dev(const struct device *dev)
1752 {
1753 return dev->release == iscsi_session_release;
1754 }
1755 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1756
1757 static int iscsi_iter_session_fn(struct device *dev, void *data)
1758 {
1759 void (* fn) (struct iscsi_cls_session *) = data;
1760
1761 if (!iscsi_is_session_dev(dev))
1762 return 0;
1763 fn(iscsi_dev_to_session(dev));
1764 return 0;
1765 }
1766
1767 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1768 void (*fn)(struct iscsi_cls_session *))
1769 {
1770 device_for_each_child(&shost->shost_gendev, fn,
1771 iscsi_iter_session_fn);
1772 }
1773 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1774
1775 /**
1776 * iscsi_scan_finished - helper to report when running scans are done
1777 * @shost: scsi host
1778 * @time: scan run time
1779 *
1780 * This function can be used by drives like qla4xxx to report to the scsi
1781 * layer when the scans it kicked off at module load time are done.
1782 */
1783 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1784 {
1785 struct iscsi_cls_host *ihost = shost->shost_data;
1786 /*
1787 * qla4xxx will have kicked off some session unblocks before calling
1788 * scsi_scan_host, so just wait for them to complete.
1789 */
1790 return !atomic_read(&ihost->nr_scans);
1791 }
1792 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1793
1794 struct iscsi_scan_data {
1795 unsigned int channel;
1796 unsigned int id;
1797 u64 lun;
1798 enum scsi_scan_mode rescan;
1799 };
1800
1801 static int iscsi_user_scan_session(struct device *dev, void *data)
1802 {
1803 struct iscsi_scan_data *scan_data = data;
1804 struct iscsi_cls_session *session;
1805 struct Scsi_Host *shost;
1806 struct iscsi_cls_host *ihost;
1807 unsigned long flags;
1808 unsigned int id;
1809
1810 if (!iscsi_is_session_dev(dev))
1811 return 0;
1812
1813 session = iscsi_dev_to_session(dev);
1814
1815 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1816
1817 shost = iscsi_session_to_shost(session);
1818 ihost = shost->shost_data;
1819
1820 mutex_lock(&ihost->mutex);
1821 spin_lock_irqsave(&session->lock, flags);
1822 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1823 spin_unlock_irqrestore(&session->lock, flags);
1824 goto user_scan_exit;
1825 }
1826 id = session->target_id;
1827 spin_unlock_irqrestore(&session->lock, flags);
1828
1829 if (id != ISCSI_MAX_TARGET) {
1830 if ((scan_data->channel == SCAN_WILD_CARD ||
1831 scan_data->channel == 0) &&
1832 (scan_data->id == SCAN_WILD_CARD ||
1833 scan_data->id == id))
1834 scsi_scan_target(&session->dev, 0, id,
1835 scan_data->lun, scan_data->rescan);
1836 }
1837
1838 user_scan_exit:
1839 mutex_unlock(&ihost->mutex);
1840 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1841 return 0;
1842 }
1843
1844 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1845 uint id, u64 lun)
1846 {
1847 struct iscsi_scan_data scan_data;
1848
1849 scan_data.channel = channel;
1850 scan_data.id = id;
1851 scan_data.lun = lun;
1852 scan_data.rescan = SCSI_SCAN_MANUAL;
1853
1854 return device_for_each_child(&shost->shost_gendev, &scan_data,
1855 iscsi_user_scan_session);
1856 }
1857
1858 static void iscsi_scan_session(struct work_struct *work)
1859 {
1860 struct iscsi_cls_session *session =
1861 container_of(work, struct iscsi_cls_session, scan_work);
1862 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1863 struct iscsi_cls_host *ihost = shost->shost_data;
1864 struct iscsi_scan_data scan_data;
1865
1866 scan_data.channel = 0;
1867 scan_data.id = SCAN_WILD_CARD;
1868 scan_data.lun = SCAN_WILD_CARD;
1869 scan_data.rescan = SCSI_SCAN_RESCAN;
1870
1871 iscsi_user_scan_session(&session->dev, &scan_data);
1872 atomic_dec(&ihost->nr_scans);
1873 }
1874
1875 /**
1876 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1877 * @cmd: scsi cmd passed to scsi eh handler
1878 *
1879 * If the session is down this function will wait for the recovery
1880 * timer to fire or for the session to be logged back in. If the
1881 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1882 * should pass this error value to the scsi eh.
1883 */
1884 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1885 {
1886 struct iscsi_cls_session *session =
1887 starget_to_session(scsi_target(cmd->device));
1888 unsigned long flags;
1889 int ret = 0;
1890
1891 spin_lock_irqsave(&session->lock, flags);
1892 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1893 if (session->state == ISCSI_SESSION_FREE) {
1894 ret = FAST_IO_FAIL;
1895 break;
1896 }
1897 spin_unlock_irqrestore(&session->lock, flags);
1898 msleep(1000);
1899 spin_lock_irqsave(&session->lock, flags);
1900 }
1901 spin_unlock_irqrestore(&session->lock, flags);
1902 return ret;
1903 }
1904 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1905
1906 static void session_recovery_timedout(struct work_struct *work)
1907 {
1908 struct iscsi_cls_session *session =
1909 container_of(work, struct iscsi_cls_session,
1910 recovery_work.work);
1911 unsigned long flags;
1912
1913 iscsi_cls_session_printk(KERN_INFO, session,
1914 "session recovery timed out after %d secs\n",
1915 session->recovery_tmo);
1916
1917 spin_lock_irqsave(&session->lock, flags);
1918 switch (session->state) {
1919 case ISCSI_SESSION_FAILED:
1920 session->state = ISCSI_SESSION_FREE;
1921 break;
1922 case ISCSI_SESSION_LOGGED_IN:
1923 case ISCSI_SESSION_FREE:
1924 /* we raced with the unblock's flush */
1925 spin_unlock_irqrestore(&session->lock, flags);
1926 return;
1927 }
1928 spin_unlock_irqrestore(&session->lock, flags);
1929
1930 if (session->transport->session_recovery_timedout)
1931 session->transport->session_recovery_timedout(session);
1932
1933 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1934 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1935 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1936 }
1937
1938 static void __iscsi_unblock_session(struct work_struct *work)
1939 {
1940 struct iscsi_cls_session *session =
1941 container_of(work, struct iscsi_cls_session,
1942 unblock_work);
1943 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1944 struct iscsi_cls_host *ihost = shost->shost_data;
1945 unsigned long flags;
1946
1947 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1948 /*
1949 * The recovery and unblock work get run from the same workqueue,
1950 * so try to cancel it if it was going to run after this unblock.
1951 */
1952 cancel_delayed_work(&session->recovery_work);
1953 spin_lock_irqsave(&session->lock, flags);
1954 session->state = ISCSI_SESSION_LOGGED_IN;
1955 spin_unlock_irqrestore(&session->lock, flags);
1956 /* start IO */
1957 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1958 /*
1959 * Only do kernel scanning if the driver is properly hooked into
1960 * the async scanning code (drivers like iscsi_tcp do login and
1961 * scanning from userspace).
1962 */
1963 if (shost->hostt->scan_finished) {
1964 if (scsi_queue_work(shost, &session->scan_work))
1965 atomic_inc(&ihost->nr_scans);
1966 }
1967 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1968 }
1969
1970 /**
1971 * iscsi_unblock_session - set a session as logged in and start IO.
1972 * @session: iscsi session
1973 *
1974 * Mark a session as ready to accept IO.
1975 */
1976 void iscsi_unblock_session(struct iscsi_cls_session *session)
1977 {
1978 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1979 /*
1980 * Blocking the session can be done from any context so we only
1981 * queue the block work. Make sure the unblock work has completed
1982 * because it flushes/cancels the other works and updates the state.
1983 */
1984 flush_work(&session->unblock_work);
1985 }
1986 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1987
1988 static void __iscsi_block_session(struct work_struct *work)
1989 {
1990 struct iscsi_cls_session *session =
1991 container_of(work, struct iscsi_cls_session,
1992 block_work);
1993 unsigned long flags;
1994
1995 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1996 spin_lock_irqsave(&session->lock, flags);
1997 session->state = ISCSI_SESSION_FAILED;
1998 spin_unlock_irqrestore(&session->lock, flags);
1999 scsi_target_block(&session->dev);
2000 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
2001 if (session->recovery_tmo >= 0)
2002 queue_delayed_work(iscsi_eh_timer_workq,
2003 &session->recovery_work,
2004 session->recovery_tmo * HZ);
2005 }
2006
2007 void iscsi_block_session(struct iscsi_cls_session *session)
2008 {
2009 queue_work(iscsi_eh_timer_workq, &session->block_work);
2010 }
2011 EXPORT_SYMBOL_GPL(iscsi_block_session);
2012
2013 static void __iscsi_unbind_session(struct work_struct *work)
2014 {
2015 struct iscsi_cls_session *session =
2016 container_of(work, struct iscsi_cls_session,
2017 unbind_work);
2018 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2019 struct iscsi_cls_host *ihost = shost->shost_data;
2020 unsigned long flags;
2021 unsigned int target_id;
2022
2023 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2024
2025 /* Prevent new scans and make sure scanning is not in progress */
2026 mutex_lock(&ihost->mutex);
2027 spin_lock_irqsave(&session->lock, flags);
2028 if (session->target_id == ISCSI_MAX_TARGET) {
2029 spin_unlock_irqrestore(&session->lock, flags);
2030 mutex_unlock(&ihost->mutex);
2031 goto unbind_session_exit;
2032 }
2033
2034 target_id = session->target_id;
2035 session->target_id = ISCSI_MAX_TARGET;
2036 spin_unlock_irqrestore(&session->lock, flags);
2037 mutex_unlock(&ihost->mutex);
2038
2039 scsi_remove_target(&session->dev);
2040
2041 if (session->ida_used)
2042 ida_simple_remove(&iscsi_sess_ida, target_id);
2043
2044 unbind_session_exit:
2045 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2046 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2047 }
2048
2049 static void __iscsi_destroy_session(struct work_struct *work)
2050 {
2051 struct iscsi_cls_session *session =
2052 container_of(work, struct iscsi_cls_session, destroy_work);
2053
2054 session->transport->destroy_session(session);
2055 }
2056
2057 struct iscsi_cls_session *
2058 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2059 int dd_size)
2060 {
2061 struct iscsi_cls_session *session;
2062
2063 session = kzalloc(sizeof(*session) + dd_size,
2064 GFP_KERNEL);
2065 if (!session)
2066 return NULL;
2067
2068 session->transport = transport;
2069 session->creator = -1;
2070 session->recovery_tmo = 120;
2071 session->recovery_tmo_sysfs_override = false;
2072 session->state = ISCSI_SESSION_FREE;
2073 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2074 INIT_LIST_HEAD(&session->sess_list);
2075 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2076 INIT_WORK(&session->block_work, __iscsi_block_session);
2077 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2078 INIT_WORK(&session->scan_work, iscsi_scan_session);
2079 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2080 spin_lock_init(&session->lock);
2081
2082 /* this is released in the dev's release function */
2083 scsi_host_get(shost);
2084 session->dev.parent = &shost->shost_gendev;
2085 session->dev.release = iscsi_session_release;
2086 device_initialize(&session->dev);
2087 if (dd_size)
2088 session->dd_data = &session[1];
2089
2090 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2091 return session;
2092 }
2093 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2094
2095 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2096 {
2097 unsigned long flags;
2098 int id = 0;
2099 int err;
2100
2101 session->sid = atomic_add_return(1, &iscsi_session_nr);
2102
2103 if (target_id == ISCSI_MAX_TARGET) {
2104 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2105
2106 if (id < 0) {
2107 iscsi_cls_session_printk(KERN_ERR, session,
2108 "Failure in Target ID Allocation\n");
2109 return id;
2110 }
2111 session->target_id = (unsigned int)id;
2112 session->ida_used = true;
2113 } else
2114 session->target_id = target_id;
2115
2116 dev_set_name(&session->dev, "session%u", session->sid);
2117 err = device_add(&session->dev);
2118 if (err) {
2119 iscsi_cls_session_printk(KERN_ERR, session,
2120 "could not register session's dev\n");
2121 goto release_ida;
2122 }
2123 err = transport_register_device(&session->dev);
2124 if (err) {
2125 iscsi_cls_session_printk(KERN_ERR, session,
2126 "could not register transport's dev\n");
2127 goto release_dev;
2128 }
2129
2130 spin_lock_irqsave(&sesslock, flags);
2131 list_add(&session->sess_list, &sesslist);
2132 spin_unlock_irqrestore(&sesslock, flags);
2133
2134 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2135 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2136 return 0;
2137
2138 release_dev:
2139 device_del(&session->dev);
2140 release_ida:
2141 if (session->ida_used)
2142 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2143
2144 return err;
2145 }
2146 EXPORT_SYMBOL_GPL(iscsi_add_session);
2147
2148 /**
2149 * iscsi_create_session - create iscsi class session
2150 * @shost: scsi host
2151 * @transport: iscsi transport
2152 * @dd_size: private driver data size
2153 * @target_id: which target
2154 *
2155 * This can be called from a LLD or iscsi_transport.
2156 */
2157 struct iscsi_cls_session *
2158 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2159 int dd_size, unsigned int target_id)
2160 {
2161 struct iscsi_cls_session *session;
2162
2163 session = iscsi_alloc_session(shost, transport, dd_size);
2164 if (!session)
2165 return NULL;
2166
2167 if (iscsi_add_session(session, target_id)) {
2168 iscsi_free_session(session);
2169 return NULL;
2170 }
2171 return session;
2172 }
2173 EXPORT_SYMBOL_GPL(iscsi_create_session);
2174
2175 static void iscsi_conn_release(struct device *dev)
2176 {
2177 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2178 struct device *parent = conn->dev.parent;
2179
2180 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2181 kfree(conn);
2182 put_device(parent);
2183 }
2184
2185 static int iscsi_is_conn_dev(const struct device *dev)
2186 {
2187 return dev->release == iscsi_conn_release;
2188 }
2189
2190 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2191 {
2192 if (!iscsi_is_conn_dev(dev))
2193 return 0;
2194 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2195 }
2196
2197 void iscsi_remove_session(struct iscsi_cls_session *session)
2198 {
2199 unsigned long flags;
2200 int err;
2201
2202 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2203
2204 spin_lock_irqsave(&sesslock, flags);
2205 if (!list_empty(&session->sess_list))
2206 list_del(&session->sess_list);
2207 spin_unlock_irqrestore(&sesslock, flags);
2208
2209 flush_work(&session->block_work);
2210 flush_work(&session->unblock_work);
2211 cancel_delayed_work_sync(&session->recovery_work);
2212 /*
2213 * If we are blocked let commands flow again. The lld or iscsi
2214 * layer should set up the queuecommand to fail commands.
2215 * We assume that LLD will not be calling block/unblock while
2216 * removing the session.
2217 */
2218 spin_lock_irqsave(&session->lock, flags);
2219 session->state = ISCSI_SESSION_FREE;
2220 spin_unlock_irqrestore(&session->lock, flags);
2221
2222 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2223 /* flush running scans then delete devices */
2224 flush_work(&session->scan_work);
2225 /* flush running unbind operations */
2226 flush_work(&session->unbind_work);
2227 __iscsi_unbind_session(&session->unbind_work);
2228
2229 /* hw iscsi may not have removed all connections from session */
2230 err = device_for_each_child(&session->dev, NULL,
2231 iscsi_iter_destroy_conn_fn);
2232 if (err)
2233 iscsi_cls_session_printk(KERN_ERR, session,
2234 "Could not delete all connections "
2235 "for session. Error %d.\n", err);
2236
2237 transport_unregister_device(&session->dev);
2238
2239 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2240 device_del(&session->dev);
2241 }
2242 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2243
2244 void iscsi_free_session(struct iscsi_cls_session *session)
2245 {
2246 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2247 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2248 put_device(&session->dev);
2249 }
2250 EXPORT_SYMBOL_GPL(iscsi_free_session);
2251
2252 /**
2253 * iscsi_create_conn - create iscsi class connection
2254 * @session: iscsi cls session
2255 * @dd_size: private driver data size
2256 * @cid: connection id
2257 *
2258 * This can be called from a LLD or iscsi_transport. The connection
2259 * is child of the session so cid must be unique for all connections
2260 * on the session.
2261 *
2262 * Since we do not support MCS, cid will normally be zero. In some cases
2263 * for software iscsi we could be trying to preallocate a connection struct
2264 * in which case there could be two connection structs and cid would be
2265 * non-zero.
2266 */
2267 struct iscsi_cls_conn *
2268 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2269 {
2270 struct iscsi_transport *transport = session->transport;
2271 struct iscsi_cls_conn *conn;
2272 unsigned long flags;
2273 int err;
2274
2275 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2276 if (!conn)
2277 return NULL;
2278 if (dd_size)
2279 conn->dd_data = &conn[1];
2280
2281 mutex_init(&conn->ep_mutex);
2282 INIT_LIST_HEAD(&conn->conn_list);
2283 INIT_LIST_HEAD(&conn->conn_list_err);
2284 conn->transport = transport;
2285 conn->cid = cid;
2286 conn->state = ISCSI_CONN_DOWN;
2287
2288 /* this is released in the dev's release function */
2289 if (!get_device(&session->dev))
2290 goto free_conn;
2291
2292 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2293 conn->dev.parent = &session->dev;
2294 conn->dev.release = iscsi_conn_release;
2295 err = device_register(&conn->dev);
2296 if (err) {
2297 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2298 "register connection's dev\n");
2299 goto release_parent_ref;
2300 }
2301 err = transport_register_device(&conn->dev);
2302 if (err) {
2303 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2304 "register transport's dev\n");
2305 goto release_conn_ref;
2306 }
2307
2308 spin_lock_irqsave(&connlock, flags);
2309 list_add(&conn->conn_list, &connlist);
2310 spin_unlock_irqrestore(&connlock, flags);
2311
2312 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2313 return conn;
2314
2315 release_conn_ref:
2316 device_unregister(&conn->dev);
2317 put_device(&session->dev);
2318 return NULL;
2319 release_parent_ref:
2320 put_device(&session->dev);
2321 free_conn:
2322 kfree(conn);
2323 return NULL;
2324 }
2325
2326 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2327
2328 /**
2329 * iscsi_destroy_conn - destroy iscsi class connection
2330 * @conn: iscsi cls session
2331 *
2332 * This can be called from a LLD or iscsi_transport.
2333 */
2334 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2335 {
2336 unsigned long flags;
2337
2338 spin_lock_irqsave(&connlock, flags);
2339 list_del(&conn->conn_list);
2340 list_del(&conn->conn_list_err);
2341 spin_unlock_irqrestore(&connlock, flags);
2342
2343 transport_unregister_device(&conn->dev);
2344 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2345 device_unregister(&conn->dev);
2346 return 0;
2347 }
2348 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2349
2350 /*
2351 * iscsi interface functions
2352 */
2353 static struct iscsi_internal *
2354 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2355 {
2356 struct iscsi_internal *priv;
2357 unsigned long flags;
2358
2359 spin_lock_irqsave(&iscsi_transport_lock, flags);
2360 list_for_each_entry(priv, &iscsi_transports, list) {
2361 if (tt == priv->iscsi_transport) {
2362 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2363 return priv;
2364 }
2365 }
2366 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2367 return NULL;
2368 }
2369
2370 static int
2371 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2372 {
2373 return nlmsg_multicast(nls, skb, 0, group, gfp);
2374 }
2375
2376 static int
2377 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2378 {
2379 return nlmsg_unicast(nls, skb, portid);
2380 }
2381
2382 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2383 char *data, uint32_t data_size)
2384 {
2385 struct nlmsghdr *nlh;
2386 struct sk_buff *skb;
2387 struct iscsi_uevent *ev;
2388 char *pdu;
2389 struct iscsi_internal *priv;
2390 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2391 data_size);
2392
2393 priv = iscsi_if_transport_lookup(conn->transport);
2394 if (!priv)
2395 return -EINVAL;
2396
2397 skb = alloc_skb(len, GFP_ATOMIC);
2398 if (!skb) {
2399 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2400 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2401 "control PDU: OOM\n");
2402 return -ENOMEM;
2403 }
2404
2405 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2406 ev = nlmsg_data(nlh);
2407 memset(ev, 0, sizeof(*ev));
2408 ev->transport_handle = iscsi_handle(conn->transport);
2409 ev->type = ISCSI_KEVENT_RECV_PDU;
2410 ev->r.recv_req.cid = conn->cid;
2411 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2412 pdu = (char*)ev + sizeof(*ev);
2413 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2414 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2415
2416 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2417 }
2418 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2419
2420 int iscsi_offload_mesg(struct Scsi_Host *shost,
2421 struct iscsi_transport *transport, uint32_t type,
2422 char *data, uint16_t data_size)
2423 {
2424 struct nlmsghdr *nlh;
2425 struct sk_buff *skb;
2426 struct iscsi_uevent *ev;
2427 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2428
2429 skb = alloc_skb(len, GFP_ATOMIC);
2430 if (!skb) {
2431 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2432 return -ENOMEM;
2433 }
2434
2435 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2436 ev = nlmsg_data(nlh);
2437 memset(ev, 0, sizeof(*ev));
2438 ev->type = type;
2439 ev->transport_handle = iscsi_handle(transport);
2440 switch (type) {
2441 case ISCSI_KEVENT_PATH_REQ:
2442 ev->r.req_path.host_no = shost->host_no;
2443 break;
2444 case ISCSI_KEVENT_IF_DOWN:
2445 ev->r.notify_if_down.host_no = shost->host_no;
2446 break;
2447 }
2448
2449 memcpy((char *)ev + sizeof(*ev), data, data_size);
2450
2451 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2452 }
2453 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2454
2455 /*
2456 * This can be called without the rx_queue_mutex, if invoked by the kernel
2457 * stop work. But, in that case, it is guaranteed not to race with
2458 * iscsi_destroy by conn_mutex.
2459 */
2460 static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag)
2461 {
2462 /*
2463 * It is important that this path doesn't rely on
2464 * rx_queue_mutex, otherwise, a thread doing allocation on a
2465 * start_session/start_connection could sleep waiting on a
2466 * writeback to a failed iscsi device, that cannot be recovered
2467 * because the lock is held. If we don't hold it here, the
2468 * kernel stop_conn_work_fn has a chance to stop the broken
2469 * session and resolve the allocation.
2470 *
2471 * Still, the user invoked .stop_conn() needs to be serialized
2472 * with stop_conn_work_fn by a private mutex. Not pretty, but
2473 * it works.
2474 */
2475 mutex_lock(&conn_mutex);
2476 conn->transport->stop_conn(conn, flag);
2477 mutex_unlock(&conn_mutex);
2478
2479 }
2480
2481 static void stop_conn_work_fn(struct work_struct *work)
2482 {
2483 struct iscsi_cls_conn *conn, *tmp;
2484 unsigned long flags;
2485 LIST_HEAD(recovery_list);
2486
2487 spin_lock_irqsave(&connlock, flags);
2488 if (list_empty(&connlist_err)) {
2489 spin_unlock_irqrestore(&connlock, flags);
2490 return;
2491 }
2492 list_splice_init(&connlist_err, &recovery_list);
2493 spin_unlock_irqrestore(&connlock, flags);
2494
2495 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) {
2496 uint32_t sid = iscsi_conn_get_sid(conn);
2497 struct iscsi_cls_session *session;
2498
2499 session = iscsi_session_lookup(sid);
2500 if (session) {
2501 if (system_state != SYSTEM_RUNNING) {
2502 session->recovery_tmo = 0;
2503 iscsi_if_stop_conn(conn, STOP_CONN_TERM);
2504 } else {
2505 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER);
2506 }
2507 }
2508
2509 list_del_init(&conn->conn_list_err);
2510 }
2511 }
2512
2513 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2514 {
2515 struct nlmsghdr *nlh;
2516 struct sk_buff *skb;
2517 struct iscsi_uevent *ev;
2518 struct iscsi_internal *priv;
2519 int len = nlmsg_total_size(sizeof(*ev));
2520 unsigned long flags;
2521
2522 spin_lock_irqsave(&connlock, flags);
2523 list_add(&conn->conn_list_err, &connlist_err);
2524 spin_unlock_irqrestore(&connlock, flags);
2525 queue_work(system_unbound_wq, &stop_conn_work);
2526
2527 priv = iscsi_if_transport_lookup(conn->transport);
2528 if (!priv)
2529 return;
2530
2531 skb = alloc_skb(len, GFP_ATOMIC);
2532 if (!skb) {
2533 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2534 "conn error (%d)\n", error);
2535 return;
2536 }
2537
2538 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2539 ev = nlmsg_data(nlh);
2540 ev->transport_handle = iscsi_handle(conn->transport);
2541 ev->type = ISCSI_KEVENT_CONN_ERROR;
2542 ev->r.connerror.error = error;
2543 ev->r.connerror.cid = conn->cid;
2544 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2545
2546 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2547
2548 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2549 error);
2550 }
2551 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2552
2553 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2554 enum iscsi_conn_state state)
2555 {
2556 struct nlmsghdr *nlh;
2557 struct sk_buff *skb;
2558 struct iscsi_uevent *ev;
2559 struct iscsi_internal *priv;
2560 int len = nlmsg_total_size(sizeof(*ev));
2561
2562 priv = iscsi_if_transport_lookup(conn->transport);
2563 if (!priv)
2564 return;
2565
2566 skb = alloc_skb(len, GFP_ATOMIC);
2567 if (!skb) {
2568 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2569 "conn login (%d)\n", state);
2570 return;
2571 }
2572
2573 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2574 ev = nlmsg_data(nlh);
2575 ev->transport_handle = iscsi_handle(conn->transport);
2576 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2577 ev->r.conn_login.state = state;
2578 ev->r.conn_login.cid = conn->cid;
2579 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2580 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2581
2582 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2583 state);
2584 }
2585 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2586
2587 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2588 enum iscsi_host_event_code code, uint32_t data_size,
2589 uint8_t *data)
2590 {
2591 struct nlmsghdr *nlh;
2592 struct sk_buff *skb;
2593 struct iscsi_uevent *ev;
2594 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2595
2596 skb = alloc_skb(len, GFP_NOIO);
2597 if (!skb) {
2598 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2599 host_no, code);
2600 return;
2601 }
2602
2603 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2604 ev = nlmsg_data(nlh);
2605 ev->transport_handle = iscsi_handle(transport);
2606 ev->type = ISCSI_KEVENT_HOST_EVENT;
2607 ev->r.host_event.host_no = host_no;
2608 ev->r.host_event.code = code;
2609 ev->r.host_event.data_size = data_size;
2610
2611 if (data_size)
2612 memcpy((char *)ev + sizeof(*ev), data, data_size);
2613
2614 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2615 }
2616 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2617
2618 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2619 uint32_t status, uint32_t pid, uint32_t data_size,
2620 uint8_t *data)
2621 {
2622 struct nlmsghdr *nlh;
2623 struct sk_buff *skb;
2624 struct iscsi_uevent *ev;
2625 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2626
2627 skb = alloc_skb(len, GFP_NOIO);
2628 if (!skb) {
2629 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2630 return;
2631 }
2632
2633 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2634 ev = nlmsg_data(nlh);
2635 ev->transport_handle = iscsi_handle(transport);
2636 ev->type = ISCSI_KEVENT_PING_COMP;
2637 ev->r.ping_comp.host_no = host_no;
2638 ev->r.ping_comp.status = status;
2639 ev->r.ping_comp.pid = pid;
2640 ev->r.ping_comp.data_size = data_size;
2641 memcpy((char *)ev + sizeof(*ev), data, data_size);
2642
2643 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2644 }
2645 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2646
2647 static int
2648 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2649 {
2650 struct sk_buff *skb;
2651 struct nlmsghdr *nlh;
2652 int len = nlmsg_total_size(size);
2653
2654 skb = alloc_skb(len, GFP_ATOMIC);
2655 if (!skb) {
2656 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2657 return -ENOMEM;
2658 }
2659
2660 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2661 memcpy(nlmsg_data(nlh), payload, size);
2662 return iscsi_unicast_skb(skb, portid);
2663 }
2664
2665 static int
2666 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2667 {
2668 struct iscsi_uevent *ev = nlmsg_data(nlh);
2669 struct iscsi_stats *stats;
2670 struct sk_buff *skbstat;
2671 struct iscsi_cls_conn *conn;
2672 struct nlmsghdr *nlhstat;
2673 struct iscsi_uevent *evstat;
2674 struct iscsi_internal *priv;
2675 int len = nlmsg_total_size(sizeof(*ev) +
2676 sizeof(struct iscsi_stats) +
2677 sizeof(struct iscsi_stats_custom) *
2678 ISCSI_STATS_CUSTOM_MAX);
2679 int err = 0;
2680
2681 priv = iscsi_if_transport_lookup(transport);
2682 if (!priv)
2683 return -EINVAL;
2684
2685 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2686 if (!conn)
2687 return -EEXIST;
2688
2689 do {
2690 int actual_size;
2691
2692 skbstat = alloc_skb(len, GFP_ATOMIC);
2693 if (!skbstat) {
2694 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2695 "deliver stats: OOM\n");
2696 return -ENOMEM;
2697 }
2698
2699 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2700 (len - sizeof(*nlhstat)), 0);
2701 evstat = nlmsg_data(nlhstat);
2702 memset(evstat, 0, sizeof(*evstat));
2703 evstat->transport_handle = iscsi_handle(conn->transport);
2704 evstat->type = nlh->nlmsg_type;
2705 evstat->u.get_stats.cid =
2706 ev->u.get_stats.cid;
2707 evstat->u.get_stats.sid =
2708 ev->u.get_stats.sid;
2709 stats = (struct iscsi_stats *)
2710 ((char*)evstat + sizeof(*evstat));
2711 memset(stats, 0, sizeof(*stats));
2712
2713 transport->get_stats(conn, stats);
2714 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2715 sizeof(struct iscsi_stats) +
2716 sizeof(struct iscsi_stats_custom) *
2717 stats->custom_length);
2718 actual_size -= sizeof(*nlhstat);
2719 actual_size = nlmsg_msg_size(actual_size);
2720 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2721 nlhstat->nlmsg_len = actual_size;
2722
2723 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2724 GFP_ATOMIC);
2725 } while (err < 0 && err != -ECONNREFUSED);
2726
2727 return err;
2728 }
2729
2730 /**
2731 * iscsi_session_event - send session destr. completion event
2732 * @session: iscsi class session
2733 * @event: type of event
2734 */
2735 int iscsi_session_event(struct iscsi_cls_session *session,
2736 enum iscsi_uevent_e event)
2737 {
2738 struct iscsi_internal *priv;
2739 struct Scsi_Host *shost;
2740 struct iscsi_uevent *ev;
2741 struct sk_buff *skb;
2742 struct nlmsghdr *nlh;
2743 int rc, len = nlmsg_total_size(sizeof(*ev));
2744
2745 priv = iscsi_if_transport_lookup(session->transport);
2746 if (!priv)
2747 return -EINVAL;
2748 shost = iscsi_session_to_shost(session);
2749
2750 skb = alloc_skb(len, GFP_KERNEL);
2751 if (!skb) {
2752 iscsi_cls_session_printk(KERN_ERR, session,
2753 "Cannot notify userspace of session "
2754 "event %u\n", event);
2755 return -ENOMEM;
2756 }
2757
2758 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2759 ev = nlmsg_data(nlh);
2760 ev->transport_handle = iscsi_handle(session->transport);
2761
2762 ev->type = event;
2763 switch (event) {
2764 case ISCSI_KEVENT_DESTROY_SESSION:
2765 ev->r.d_session.host_no = shost->host_no;
2766 ev->r.d_session.sid = session->sid;
2767 break;
2768 case ISCSI_KEVENT_CREATE_SESSION:
2769 ev->r.c_session_ret.host_no = shost->host_no;
2770 ev->r.c_session_ret.sid = session->sid;
2771 break;
2772 case ISCSI_KEVENT_UNBIND_SESSION:
2773 ev->r.unbind_session.host_no = shost->host_no;
2774 ev->r.unbind_session.sid = session->sid;
2775 break;
2776 default:
2777 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2778 "%u.\n", event);
2779 kfree_skb(skb);
2780 return -EINVAL;
2781 }
2782
2783 /*
2784 * this will occur if the daemon is not up, so we just warn
2785 * the user and when the daemon is restarted it will handle it
2786 */
2787 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2788 if (rc == -ESRCH)
2789 iscsi_cls_session_printk(KERN_ERR, session,
2790 "Cannot notify userspace of session "
2791 "event %u. Check iscsi daemon\n",
2792 event);
2793
2794 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2795 event, rc);
2796 return rc;
2797 }
2798 EXPORT_SYMBOL_GPL(iscsi_session_event);
2799
2800 static int
2801 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2802 struct iscsi_uevent *ev, pid_t pid,
2803 uint32_t initial_cmdsn, uint16_t cmds_max,
2804 uint16_t queue_depth)
2805 {
2806 struct iscsi_transport *transport = priv->iscsi_transport;
2807 struct iscsi_cls_session *session;
2808 struct Scsi_Host *shost;
2809
2810 session = transport->create_session(ep, cmds_max, queue_depth,
2811 initial_cmdsn);
2812 if (!session)
2813 return -ENOMEM;
2814
2815 session->creator = pid;
2816 shost = iscsi_session_to_shost(session);
2817 ev->r.c_session_ret.host_no = shost->host_no;
2818 ev->r.c_session_ret.sid = session->sid;
2819 ISCSI_DBG_TRANS_SESSION(session,
2820 "Completed creating transport session\n");
2821 return 0;
2822 }
2823
2824 static int
2825 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2826 {
2827 struct iscsi_cls_conn *conn;
2828 struct iscsi_cls_session *session;
2829
2830 session = iscsi_session_lookup(ev->u.c_conn.sid);
2831 if (!session) {
2832 printk(KERN_ERR "iscsi: invalid session %d.\n",
2833 ev->u.c_conn.sid);
2834 return -EINVAL;
2835 }
2836
2837 conn = transport->create_conn(session, ev->u.c_conn.cid);
2838 if (!conn) {
2839 iscsi_cls_session_printk(KERN_ERR, session,
2840 "couldn't create a new connection.");
2841 return -ENOMEM;
2842 }
2843
2844 ev->r.c_conn_ret.sid = session->sid;
2845 ev->r.c_conn_ret.cid = conn->cid;
2846
2847 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2848 return 0;
2849 }
2850
2851 static int
2852 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2853 {
2854 struct iscsi_cls_conn *conn;
2855 unsigned long flags;
2856
2857 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2858 if (!conn)
2859 return -EINVAL;
2860
2861 spin_lock_irqsave(&connlock, flags);
2862 if (!list_empty(&conn->conn_list_err)) {
2863 spin_unlock_irqrestore(&connlock, flags);
2864 return -EAGAIN;
2865 }
2866 spin_unlock_irqrestore(&connlock, flags);
2867
2868 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2869
2870 mutex_lock(&conn_mutex);
2871 if (transport->destroy_conn)
2872 transport->destroy_conn(conn);
2873 mutex_unlock(&conn_mutex);
2874
2875 return 0;
2876 }
2877
2878 static int
2879 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2880 {
2881 char *data = (char*)ev + sizeof(*ev);
2882 struct iscsi_cls_conn *conn;
2883 struct iscsi_cls_session *session;
2884 int err = 0, value = 0;
2885
2886 session = iscsi_session_lookup(ev->u.set_param.sid);
2887 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2888 if (!conn || !session)
2889 return -EINVAL;
2890
2891 switch (ev->u.set_param.param) {
2892 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2893 sscanf(data, "%d", &value);
2894 if (!session->recovery_tmo_sysfs_override)
2895 session->recovery_tmo = value;
2896 break;
2897 default:
2898 err = transport->set_param(conn, ev->u.set_param.param,
2899 data, ev->u.set_param.len);
2900 }
2901
2902 return err;
2903 }
2904
2905 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2906 struct iscsi_uevent *ev, int msg_type)
2907 {
2908 struct iscsi_endpoint *ep;
2909 struct sockaddr *dst_addr;
2910 struct Scsi_Host *shost = NULL;
2911 int non_blocking, err = 0;
2912
2913 if (!transport->ep_connect)
2914 return -EINVAL;
2915
2916 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2917 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2918 if (!shost) {
2919 printk(KERN_ERR "ep connect failed. Could not find "
2920 "host no %u\n",
2921 ev->u.ep_connect_through_host.host_no);
2922 return -ENODEV;
2923 }
2924 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2925 } else
2926 non_blocking = ev->u.ep_connect.non_blocking;
2927
2928 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2929 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2930 if (IS_ERR(ep)) {
2931 err = PTR_ERR(ep);
2932 goto release_host;
2933 }
2934
2935 ev->r.ep_connect_ret.handle = ep->id;
2936 release_host:
2937 if (shost)
2938 scsi_host_put(shost);
2939 return err;
2940 }
2941
2942 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2943 u64 ep_handle)
2944 {
2945 struct iscsi_cls_conn *conn;
2946 struct iscsi_endpoint *ep;
2947
2948 if (!transport->ep_disconnect)
2949 return -EINVAL;
2950
2951 ep = iscsi_lookup_endpoint(ep_handle);
2952 if (!ep)
2953 return -EINVAL;
2954 conn = ep->conn;
2955 if (conn) {
2956 mutex_lock(&conn->ep_mutex);
2957 conn->ep = NULL;
2958 mutex_unlock(&conn->ep_mutex);
2959 }
2960
2961 transport->ep_disconnect(ep);
2962 return 0;
2963 }
2964
2965 static int
2966 iscsi_if_transport_ep(struct iscsi_transport *transport,
2967 struct iscsi_uevent *ev, int msg_type)
2968 {
2969 struct iscsi_endpoint *ep;
2970 int rc = 0;
2971
2972 switch (msg_type) {
2973 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2974 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2975 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2976 break;
2977 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2978 if (!transport->ep_poll)
2979 return -EINVAL;
2980
2981 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2982 if (!ep)
2983 return -EINVAL;
2984
2985 ev->r.retcode = transport->ep_poll(ep,
2986 ev->u.ep_poll.timeout_ms);
2987 break;
2988 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2989 rc = iscsi_if_ep_disconnect(transport,
2990 ev->u.ep_disconnect.ep_handle);
2991 break;
2992 }
2993 return rc;
2994 }
2995
2996 static int
2997 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2998 struct iscsi_uevent *ev)
2999 {
3000 struct Scsi_Host *shost;
3001 struct sockaddr *dst_addr;
3002 int err;
3003
3004 if (!transport->tgt_dscvr)
3005 return -EINVAL;
3006
3007 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3008 if (!shost) {
3009 printk(KERN_ERR "target discovery could not find host no %u\n",
3010 ev->u.tgt_dscvr.host_no);
3011 return -ENODEV;
3012 }
3013
3014
3015 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3016 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3017 ev->u.tgt_dscvr.enable, dst_addr);
3018 scsi_host_put(shost);
3019 return err;
3020 }
3021
3022 static int
3023 iscsi_set_host_param(struct iscsi_transport *transport,
3024 struct iscsi_uevent *ev)
3025 {
3026 char *data = (char*)ev + sizeof(*ev);
3027 struct Scsi_Host *shost;
3028 int err;
3029
3030 if (!transport->set_host_param)
3031 return -ENOSYS;
3032
3033 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3034 if (!shost) {
3035 printk(KERN_ERR "set_host_param could not find host no %u\n",
3036 ev->u.set_host_param.host_no);
3037 return -ENODEV;
3038 }
3039
3040 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3041 data, ev->u.set_host_param.len);
3042 scsi_host_put(shost);
3043 return err;
3044 }
3045
3046 static int
3047 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3048 {
3049 struct Scsi_Host *shost;
3050 struct iscsi_path *params;
3051 int err;
3052
3053 if (!transport->set_path)
3054 return -ENOSYS;
3055
3056 shost = scsi_host_lookup(ev->u.set_path.host_no);
3057 if (!shost) {
3058 printk(KERN_ERR "set path could not find host no %u\n",
3059 ev->u.set_path.host_no);
3060 return -ENODEV;
3061 }
3062
3063 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3064 err = transport->set_path(shost, params);
3065
3066 scsi_host_put(shost);
3067 return err;
3068 }
3069
3070 static int iscsi_session_has_conns(int sid)
3071 {
3072 struct iscsi_cls_conn *conn;
3073 unsigned long flags;
3074 int found = 0;
3075
3076 spin_lock_irqsave(&connlock, flags);
3077 list_for_each_entry(conn, &connlist, conn_list) {
3078 if (iscsi_conn_get_sid(conn) == sid) {
3079 found = 1;
3080 break;
3081 }
3082 }
3083 spin_unlock_irqrestore(&connlock, flags);
3084
3085 return found;
3086 }
3087
3088 static int
3089 iscsi_set_iface_params(struct iscsi_transport *transport,
3090 struct iscsi_uevent *ev, uint32_t len)
3091 {
3092 char *data = (char *)ev + sizeof(*ev);
3093 struct Scsi_Host *shost;
3094 int err;
3095
3096 if (!transport->set_iface_param)
3097 return -ENOSYS;
3098
3099 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3100 if (!shost) {
3101 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3102 ev->u.set_iface_params.host_no);
3103 return -ENODEV;
3104 }
3105
3106 err = transport->set_iface_param(shost, data, len);
3107 scsi_host_put(shost);
3108 return err;
3109 }
3110
3111 static int
3112 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3113 {
3114 struct Scsi_Host *shost;
3115 struct sockaddr *dst_addr;
3116 int err;
3117
3118 if (!transport->send_ping)
3119 return -ENOSYS;
3120
3121 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3122 if (!shost) {
3123 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3124 ev->u.iscsi_ping.host_no);
3125 return -ENODEV;
3126 }
3127
3128 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3129 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3130 ev->u.iscsi_ping.iface_type,
3131 ev->u.iscsi_ping.payload_size,
3132 ev->u.iscsi_ping.pid,
3133 dst_addr);
3134 scsi_host_put(shost);
3135 return err;
3136 }
3137
3138 static int
3139 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3140 {
3141 struct iscsi_uevent *ev = nlmsg_data(nlh);
3142 struct Scsi_Host *shost = NULL;
3143 struct iscsi_chap_rec *chap_rec;
3144 struct iscsi_internal *priv;
3145 struct sk_buff *skbchap;
3146 struct nlmsghdr *nlhchap;
3147 struct iscsi_uevent *evchap;
3148 uint32_t chap_buf_size;
3149 int len, err = 0;
3150 char *buf;
3151
3152 if (!transport->get_chap)
3153 return -EINVAL;
3154
3155 priv = iscsi_if_transport_lookup(transport);
3156 if (!priv)
3157 return -EINVAL;
3158
3159 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3160 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3161
3162 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3163 if (!shost) {
3164 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3165 __func__, ev->u.get_chap.host_no);
3166 return -ENODEV;
3167 }
3168
3169 do {
3170 int actual_size;
3171
3172 skbchap = alloc_skb(len, GFP_KERNEL);
3173 if (!skbchap) {
3174 printk(KERN_ERR "can not deliver chap: OOM\n");
3175 err = -ENOMEM;
3176 goto exit_get_chap;
3177 }
3178
3179 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3180 (len - sizeof(*nlhchap)), 0);
3181 evchap = nlmsg_data(nlhchap);
3182 memset(evchap, 0, sizeof(*evchap));
3183 evchap->transport_handle = iscsi_handle(transport);
3184 evchap->type = nlh->nlmsg_type;
3185 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3186 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3187 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3188 buf = (char *)evchap + sizeof(*evchap);
3189 memset(buf, 0, chap_buf_size);
3190
3191 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3192 &evchap->u.get_chap.num_entries, buf);
3193
3194 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3195 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3196 nlhchap->nlmsg_len = actual_size;
3197
3198 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3199 GFP_KERNEL);
3200 } while (err < 0 && err != -ECONNREFUSED);
3201
3202 exit_get_chap:
3203 scsi_host_put(shost);
3204 return err;
3205 }
3206
3207 static int iscsi_set_chap(struct iscsi_transport *transport,
3208 struct iscsi_uevent *ev, uint32_t len)
3209 {
3210 char *data = (char *)ev + sizeof(*ev);
3211 struct Scsi_Host *shost;
3212 int err = 0;
3213
3214 if (!transport->set_chap)
3215 return -ENOSYS;
3216
3217 shost = scsi_host_lookup(ev->u.set_path.host_no);
3218 if (!shost) {
3219 pr_err("%s could not find host no %u\n",
3220 __func__, ev->u.set_path.host_no);
3221 return -ENODEV;
3222 }
3223
3224 err = transport->set_chap(shost, data, len);
3225 scsi_host_put(shost);
3226 return err;
3227 }
3228
3229 static int iscsi_delete_chap(struct iscsi_transport *transport,
3230 struct iscsi_uevent *ev)
3231 {
3232 struct Scsi_Host *shost;
3233 int err = 0;
3234
3235 if (!transport->delete_chap)
3236 return -ENOSYS;
3237
3238 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3239 if (!shost) {
3240 printk(KERN_ERR "%s could not find host no %u\n",
3241 __func__, ev->u.delete_chap.host_no);
3242 return -ENODEV;
3243 }
3244
3245 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3246 scsi_host_put(shost);
3247 return err;
3248 }
3249
3250 static const struct {
3251 enum iscsi_discovery_parent_type value;
3252 char *name;
3253 } iscsi_discovery_parent_names[] = {
3254 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3255 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3256 {ISCSI_DISC_PARENT_ISNS, "isns" },
3257 };
3258
3259 char *iscsi_get_discovery_parent_name(int parent_type)
3260 {
3261 int i;
3262 char *state = "Unknown!";
3263
3264 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3265 if (iscsi_discovery_parent_names[i].value & parent_type) {
3266 state = iscsi_discovery_parent_names[i].name;
3267 break;
3268 }
3269 }
3270 return state;
3271 }
3272 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3273
3274 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3275 struct iscsi_uevent *ev, uint32_t len)
3276 {
3277 char *data = (char *)ev + sizeof(*ev);
3278 struct Scsi_Host *shost;
3279 struct iscsi_bus_flash_session *fnode_sess;
3280 struct iscsi_bus_flash_conn *fnode_conn;
3281 struct device *dev;
3282 uint32_t idx;
3283 int err = 0;
3284
3285 if (!transport->set_flashnode_param) {
3286 err = -ENOSYS;
3287 goto exit_set_fnode;
3288 }
3289
3290 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3291 if (!shost) {
3292 pr_err("%s could not find host no %u\n",
3293 __func__, ev->u.set_flashnode.host_no);
3294 err = -ENODEV;
3295 goto exit_set_fnode;
3296 }
3297
3298 idx = ev->u.set_flashnode.flashnode_idx;
3299 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3300 if (!fnode_sess) {
3301 pr_err("%s could not find flashnode %u for host no %u\n",
3302 __func__, idx, ev->u.set_flashnode.host_no);
3303 err = -ENODEV;
3304 goto put_host;
3305 }
3306
3307 dev = iscsi_find_flashnode_conn(fnode_sess);
3308 if (!dev) {
3309 err = -ENODEV;
3310 goto put_sess;
3311 }
3312
3313 fnode_conn = iscsi_dev_to_flash_conn(dev);
3314 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3315 put_device(dev);
3316
3317 put_sess:
3318 put_device(&fnode_sess->dev);
3319
3320 put_host:
3321 scsi_host_put(shost);
3322
3323 exit_set_fnode:
3324 return err;
3325 }
3326
3327 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3328 struct iscsi_uevent *ev, uint32_t len)
3329 {
3330 char *data = (char *)ev + sizeof(*ev);
3331 struct Scsi_Host *shost;
3332 int index;
3333 int err = 0;
3334
3335 if (!transport->new_flashnode) {
3336 err = -ENOSYS;
3337 goto exit_new_fnode;
3338 }
3339
3340 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3341 if (!shost) {
3342 pr_err("%s could not find host no %u\n",
3343 __func__, ev->u.new_flashnode.host_no);
3344 err = -ENODEV;
3345 goto put_host;
3346 }
3347
3348 index = transport->new_flashnode(shost, data, len);
3349
3350 if (index >= 0)
3351 ev->r.new_flashnode_ret.flashnode_idx = index;
3352 else
3353 err = -EIO;
3354
3355 put_host:
3356 scsi_host_put(shost);
3357
3358 exit_new_fnode:
3359 return err;
3360 }
3361
3362 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3363 struct iscsi_uevent *ev)
3364 {
3365 struct Scsi_Host *shost;
3366 struct iscsi_bus_flash_session *fnode_sess;
3367 uint32_t idx;
3368 int err = 0;
3369
3370 if (!transport->del_flashnode) {
3371 err = -ENOSYS;
3372 goto exit_del_fnode;
3373 }
3374
3375 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3376 if (!shost) {
3377 pr_err("%s could not find host no %u\n",
3378 __func__, ev->u.del_flashnode.host_no);
3379 err = -ENODEV;
3380 goto put_host;
3381 }
3382
3383 idx = ev->u.del_flashnode.flashnode_idx;
3384 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3385 if (!fnode_sess) {
3386 pr_err("%s could not find flashnode %u for host no %u\n",
3387 __func__, idx, ev->u.del_flashnode.host_no);
3388 err = -ENODEV;
3389 goto put_host;
3390 }
3391
3392 err = transport->del_flashnode(fnode_sess);
3393 put_device(&fnode_sess->dev);
3394
3395 put_host:
3396 scsi_host_put(shost);
3397
3398 exit_del_fnode:
3399 return err;
3400 }
3401
3402 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3403 struct iscsi_uevent *ev)
3404 {
3405 struct Scsi_Host *shost;
3406 struct iscsi_bus_flash_session *fnode_sess;
3407 struct iscsi_bus_flash_conn *fnode_conn;
3408 struct device *dev;
3409 uint32_t idx;
3410 int err = 0;
3411
3412 if (!transport->login_flashnode) {
3413 err = -ENOSYS;
3414 goto exit_login_fnode;
3415 }
3416
3417 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3418 if (!shost) {
3419 pr_err("%s could not find host no %u\n",
3420 __func__, ev->u.login_flashnode.host_no);
3421 err = -ENODEV;
3422 goto put_host;
3423 }
3424
3425 idx = ev->u.login_flashnode.flashnode_idx;
3426 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3427 if (!fnode_sess) {
3428 pr_err("%s could not find flashnode %u for host no %u\n",
3429 __func__, idx, ev->u.login_flashnode.host_no);
3430 err = -ENODEV;
3431 goto put_host;
3432 }
3433
3434 dev = iscsi_find_flashnode_conn(fnode_sess);
3435 if (!dev) {
3436 err = -ENODEV;
3437 goto put_sess;
3438 }
3439
3440 fnode_conn = iscsi_dev_to_flash_conn(dev);
3441 err = transport->login_flashnode(fnode_sess, fnode_conn);
3442 put_device(dev);
3443
3444 put_sess:
3445 put_device(&fnode_sess->dev);
3446
3447 put_host:
3448 scsi_host_put(shost);
3449
3450 exit_login_fnode:
3451 return err;
3452 }
3453
3454 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3455 struct iscsi_uevent *ev)
3456 {
3457 struct Scsi_Host *shost;
3458 struct iscsi_bus_flash_session *fnode_sess;
3459 struct iscsi_bus_flash_conn *fnode_conn;
3460 struct device *dev;
3461 uint32_t idx;
3462 int err = 0;
3463
3464 if (!transport->logout_flashnode) {
3465 err = -ENOSYS;
3466 goto exit_logout_fnode;
3467 }
3468
3469 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3470 if (!shost) {
3471 pr_err("%s could not find host no %u\n",
3472 __func__, ev->u.logout_flashnode.host_no);
3473 err = -ENODEV;
3474 goto put_host;
3475 }
3476
3477 idx = ev->u.logout_flashnode.flashnode_idx;
3478 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3479 if (!fnode_sess) {
3480 pr_err("%s could not find flashnode %u for host no %u\n",
3481 __func__, idx, ev->u.logout_flashnode.host_no);
3482 err = -ENODEV;
3483 goto put_host;
3484 }
3485
3486 dev = iscsi_find_flashnode_conn(fnode_sess);
3487 if (!dev) {
3488 err = -ENODEV;
3489 goto put_sess;
3490 }
3491
3492 fnode_conn = iscsi_dev_to_flash_conn(dev);
3493
3494 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3495 put_device(dev);
3496
3497 put_sess:
3498 put_device(&fnode_sess->dev);
3499
3500 put_host:
3501 scsi_host_put(shost);
3502
3503 exit_logout_fnode:
3504 return err;
3505 }
3506
3507 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3508 struct iscsi_uevent *ev)
3509 {
3510 struct Scsi_Host *shost;
3511 struct iscsi_cls_session *session;
3512 int err = 0;
3513
3514 if (!transport->logout_flashnode_sid) {
3515 err = -ENOSYS;
3516 goto exit_logout_sid;
3517 }
3518
3519 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3520 if (!shost) {
3521 pr_err("%s could not find host no %u\n",
3522 __func__, ev->u.logout_flashnode.host_no);
3523 err = -ENODEV;
3524 goto put_host;
3525 }
3526
3527 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3528 if (!session) {
3529 pr_err("%s could not find session id %u\n",
3530 __func__, ev->u.logout_flashnode_sid.sid);
3531 err = -EINVAL;
3532 goto put_host;
3533 }
3534
3535 err = transport->logout_flashnode_sid(session);
3536
3537 put_host:
3538 scsi_host_put(shost);
3539
3540 exit_logout_sid:
3541 return err;
3542 }
3543
3544 static int
3545 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3546 {
3547 struct iscsi_uevent *ev = nlmsg_data(nlh);
3548 struct Scsi_Host *shost = NULL;
3549 struct iscsi_internal *priv;
3550 struct sk_buff *skbhost_stats;
3551 struct nlmsghdr *nlhhost_stats;
3552 struct iscsi_uevent *evhost_stats;
3553 int host_stats_size = 0;
3554 int len, err = 0;
3555 char *buf;
3556
3557 if (!transport->get_host_stats)
3558 return -ENOSYS;
3559
3560 priv = iscsi_if_transport_lookup(transport);
3561 if (!priv)
3562 return -EINVAL;
3563
3564 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3565 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3566
3567 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3568 if (!shost) {
3569 pr_err("%s: failed. Could not find host no %u\n",
3570 __func__, ev->u.get_host_stats.host_no);
3571 return -ENODEV;
3572 }
3573
3574 do {
3575 int actual_size;
3576
3577 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3578 if (!skbhost_stats) {
3579 pr_err("cannot deliver host stats: OOM\n");
3580 err = -ENOMEM;
3581 goto exit_host_stats;
3582 }
3583
3584 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3585 (len - sizeof(*nlhhost_stats)), 0);
3586 evhost_stats = nlmsg_data(nlhhost_stats);
3587 memset(evhost_stats, 0, sizeof(*evhost_stats));
3588 evhost_stats->transport_handle = iscsi_handle(transport);
3589 evhost_stats->type = nlh->nlmsg_type;
3590 evhost_stats->u.get_host_stats.host_no =
3591 ev->u.get_host_stats.host_no;
3592 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3593 memset(buf, 0, host_stats_size);
3594
3595 err = transport->get_host_stats(shost, buf, host_stats_size);
3596 if (err) {
3597 kfree_skb(skbhost_stats);
3598 goto exit_host_stats;
3599 }
3600
3601 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3602 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3603 nlhhost_stats->nlmsg_len = actual_size;
3604
3605 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3606 GFP_KERNEL);
3607 } while (err < 0 && err != -ECONNREFUSED);
3608
3609 exit_host_stats:
3610 scsi_host_put(shost);
3611 return err;
3612 }
3613
3614
3615 static int
3616 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3617 {
3618 int err = 0;
3619 u32 portid;
3620 struct iscsi_uevent *ev = nlmsg_data(nlh);
3621 struct iscsi_transport *transport = NULL;
3622 struct iscsi_internal *priv;
3623 struct iscsi_cls_session *session;
3624 struct iscsi_cls_conn *conn;
3625 struct iscsi_endpoint *ep = NULL;
3626
3627 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3628 *group = ISCSI_NL_GRP_UIP;
3629 else
3630 *group = ISCSI_NL_GRP_ISCSID;
3631
3632 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3633 if (!priv)
3634 return -EINVAL;
3635 transport = priv->iscsi_transport;
3636
3637 if (!try_module_get(transport->owner))
3638 return -EINVAL;
3639
3640 portid = NETLINK_CB(skb).portid;
3641
3642 switch (nlh->nlmsg_type) {
3643 case ISCSI_UEVENT_CREATE_SESSION:
3644 err = iscsi_if_create_session(priv, ep, ev,
3645 portid,
3646 ev->u.c_session.initial_cmdsn,
3647 ev->u.c_session.cmds_max,
3648 ev->u.c_session.queue_depth);
3649 break;
3650 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3651 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3652 if (!ep) {
3653 err = -EINVAL;
3654 break;
3655 }
3656
3657 err = iscsi_if_create_session(priv, ep, ev,
3658 portid,
3659 ev->u.c_bound_session.initial_cmdsn,
3660 ev->u.c_bound_session.cmds_max,
3661 ev->u.c_bound_session.queue_depth);
3662 break;
3663 case ISCSI_UEVENT_DESTROY_SESSION:
3664 session = iscsi_session_lookup(ev->u.d_session.sid);
3665 if (!session)
3666 err = -EINVAL;
3667 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3668 err = -EBUSY;
3669 else
3670 transport->destroy_session(session);
3671 break;
3672 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3673 session = iscsi_session_lookup(ev->u.d_session.sid);
3674 if (!session)
3675 err = -EINVAL;
3676 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3677 err = -EBUSY;
3678 else {
3679 unsigned long flags;
3680
3681 /* Prevent this session from being found again */
3682 spin_lock_irqsave(&sesslock, flags);
3683 list_del_init(&session->sess_list);
3684 spin_unlock_irqrestore(&sesslock, flags);
3685
3686 queue_work(iscsi_destroy_workq, &session->destroy_work);
3687 }
3688 break;
3689 case ISCSI_UEVENT_UNBIND_SESSION:
3690 session = iscsi_session_lookup(ev->u.d_session.sid);
3691 if (session)
3692 scsi_queue_work(iscsi_session_to_shost(session),
3693 &session->unbind_work);
3694 else
3695 err = -EINVAL;
3696 break;
3697 case ISCSI_UEVENT_CREATE_CONN:
3698 err = iscsi_if_create_conn(transport, ev);
3699 break;
3700 case ISCSI_UEVENT_DESTROY_CONN:
3701 err = iscsi_if_destroy_conn(transport, ev);
3702 break;
3703 case ISCSI_UEVENT_BIND_CONN:
3704 session = iscsi_session_lookup(ev->u.b_conn.sid);
3705 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3706
3707 if (conn && conn->ep)
3708 iscsi_if_ep_disconnect(transport, conn->ep->id);
3709
3710 if (!session || !conn) {
3711 err = -EINVAL;
3712 break;
3713 }
3714
3715 mutex_lock(&conn_mutex);
3716 ev->r.retcode = transport->bind_conn(session, conn,
3717 ev->u.b_conn.transport_eph,
3718 ev->u.b_conn.is_leading);
3719 mutex_unlock(&conn_mutex);
3720
3721 if (ev->r.retcode || !transport->ep_connect)
3722 break;
3723
3724 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3725 if (ep) {
3726 ep->conn = conn;
3727
3728 mutex_lock(&conn->ep_mutex);
3729 conn->ep = ep;
3730 mutex_unlock(&conn->ep_mutex);
3731 } else
3732 iscsi_cls_conn_printk(KERN_ERR, conn,
3733 "Could not set ep conn "
3734 "binding\n");
3735 break;
3736 case ISCSI_UEVENT_SET_PARAM:
3737 err = iscsi_set_param(transport, ev);
3738 break;
3739 case ISCSI_UEVENT_START_CONN:
3740 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3741 if (conn) {
3742 mutex_lock(&conn_mutex);
3743 ev->r.retcode = transport->start_conn(conn);
3744 if (!ev->r.retcode)
3745 conn->state = ISCSI_CONN_UP;
3746 mutex_unlock(&conn_mutex);
3747 }
3748 else
3749 err = -EINVAL;
3750 break;
3751 case ISCSI_UEVENT_STOP_CONN:
3752 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3753 if (conn)
3754 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag);
3755 else
3756 err = -EINVAL;
3757 break;
3758 case ISCSI_UEVENT_SEND_PDU:
3759 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3760 if (conn) {
3761 mutex_lock(&conn_mutex);
3762 ev->r.retcode = transport->send_pdu(conn,
3763 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3764 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3765 ev->u.send_pdu.data_size);
3766 mutex_unlock(&conn_mutex);
3767 }
3768 else
3769 err = -EINVAL;
3770 break;
3771 case ISCSI_UEVENT_GET_STATS:
3772 err = iscsi_if_get_stats(transport, nlh);
3773 break;
3774 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3775 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3776 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3777 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3778 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3779 break;
3780 case ISCSI_UEVENT_TGT_DSCVR:
3781 err = iscsi_tgt_dscvr(transport, ev);
3782 break;
3783 case ISCSI_UEVENT_SET_HOST_PARAM:
3784 err = iscsi_set_host_param(transport, ev);
3785 break;
3786 case ISCSI_UEVENT_PATH_UPDATE:
3787 err = iscsi_set_path(transport, ev);
3788 break;
3789 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3790 err = iscsi_set_iface_params(transport, ev,
3791 nlmsg_attrlen(nlh, sizeof(*ev)));
3792 break;
3793 case ISCSI_UEVENT_PING:
3794 err = iscsi_send_ping(transport, ev);
3795 break;
3796 case ISCSI_UEVENT_GET_CHAP:
3797 err = iscsi_get_chap(transport, nlh);
3798 break;
3799 case ISCSI_UEVENT_DELETE_CHAP:
3800 err = iscsi_delete_chap(transport, ev);
3801 break;
3802 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3803 err = iscsi_set_flashnode_param(transport, ev,
3804 nlmsg_attrlen(nlh,
3805 sizeof(*ev)));
3806 break;
3807 case ISCSI_UEVENT_NEW_FLASHNODE:
3808 err = iscsi_new_flashnode(transport, ev,
3809 nlmsg_attrlen(nlh, sizeof(*ev)));
3810 break;
3811 case ISCSI_UEVENT_DEL_FLASHNODE:
3812 err = iscsi_del_flashnode(transport, ev);
3813 break;
3814 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3815 err = iscsi_login_flashnode(transport, ev);
3816 break;
3817 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3818 err = iscsi_logout_flashnode(transport, ev);
3819 break;
3820 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3821 err = iscsi_logout_flashnode_sid(transport, ev);
3822 break;
3823 case ISCSI_UEVENT_SET_CHAP:
3824 err = iscsi_set_chap(transport, ev,
3825 nlmsg_attrlen(nlh, sizeof(*ev)));
3826 break;
3827 case ISCSI_UEVENT_GET_HOST_STATS:
3828 err = iscsi_get_host_stats(transport, nlh);
3829 break;
3830 default:
3831 err = -ENOSYS;
3832 break;
3833 }
3834
3835 module_put(transport->owner);
3836 return err;
3837 }
3838
3839 /*
3840 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3841 * Malformed skbs with wrong lengths or invalid creds are not processed.
3842 */
3843 static void
3844 iscsi_if_rx(struct sk_buff *skb)
3845 {
3846 u32 portid = NETLINK_CB(skb).portid;
3847
3848 mutex_lock(&rx_queue_mutex);
3849 while (skb->len >= NLMSG_HDRLEN) {
3850 int err;
3851 uint32_t rlen;
3852 struct nlmsghdr *nlh;
3853 struct iscsi_uevent *ev;
3854 uint32_t group;
3855 int retries = ISCSI_SEND_MAX_ALLOWED;
3856
3857 nlh = nlmsg_hdr(skb);
3858 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3859 skb->len < nlh->nlmsg_len) {
3860 break;
3861 }
3862
3863 ev = nlmsg_data(nlh);
3864 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3865 if (rlen > skb->len)
3866 rlen = skb->len;
3867
3868 err = iscsi_if_recv_msg(skb, nlh, &group);
3869 if (err) {
3870 ev->type = ISCSI_KEVENT_IF_ERROR;
3871 ev->iferror = err;
3872 }
3873 do {
3874 /*
3875 * special case for GET_STATS:
3876 * on success - sending reply and stats from
3877 * inside of if_recv_msg(),
3878 * on error - fall through.
3879 */
3880 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3881 break;
3882 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3883 break;
3884 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3885 ev, sizeof(*ev));
3886 if (err == -EAGAIN && --retries < 0) {
3887 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3888 break;
3889 }
3890 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3891 skb_pull(skb, rlen);
3892 }
3893 mutex_unlock(&rx_queue_mutex);
3894 }
3895
3896 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3897 struct device_attribute dev_attr_##_prefix##_##_name = \
3898 __ATTR(_name,_mode,_show,_store)
3899
3900 /*
3901 * iSCSI connection attrs
3902 */
3903 #define iscsi_conn_attr_show(param) \
3904 static ssize_t \
3905 show_conn_param_##param(struct device *dev, \
3906 struct device_attribute *attr, char *buf) \
3907 { \
3908 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3909 struct iscsi_transport *t = conn->transport; \
3910 return t->get_conn_param(conn, param, buf); \
3911 }
3912
3913 #define iscsi_conn_attr(field, param) \
3914 iscsi_conn_attr_show(param) \
3915 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3916 NULL);
3917
3918 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3919 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3920 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3921 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3922 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3923 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3924 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3925 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3926 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3927 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3928 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3929 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3930 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3931 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3932 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3933 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3934 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3935 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3936 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3937 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3938 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3939 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3940 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3941 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3942 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3943 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3944 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3945 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3946
3947 static const char *const connection_state_names[] = {
3948 [ISCSI_CONN_UP] = "up",
3949 [ISCSI_CONN_DOWN] = "down",
3950 [ISCSI_CONN_FAILED] = "failed"
3951 };
3952
3953 static ssize_t show_conn_state(struct device *dev,
3954 struct device_attribute *attr, char *buf)
3955 {
3956 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
3957 const char *state = "unknown";
3958
3959 if (conn->state >= 0 &&
3960 conn->state < ARRAY_SIZE(connection_state_names))
3961 state = connection_state_names[conn->state];
3962
3963 return sprintf(buf, "%s\n", state);
3964 }
3965 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
3966 NULL);
3967
3968 #define iscsi_conn_ep_attr_show(param) \
3969 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3970 struct device_attribute *attr,\
3971 char *buf) \
3972 { \
3973 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3974 struct iscsi_transport *t = conn->transport; \
3975 struct iscsi_endpoint *ep; \
3976 ssize_t rc; \
3977 \
3978 /* \
3979 * Need to make sure ep_disconnect does not free the LLD's \
3980 * interconnect resources while we are trying to read them. \
3981 */ \
3982 mutex_lock(&conn->ep_mutex); \
3983 ep = conn->ep; \
3984 if (!ep && t->ep_connect) { \
3985 mutex_unlock(&conn->ep_mutex); \
3986 return -ENOTCONN; \
3987 } \
3988 \
3989 if (ep) \
3990 rc = t->get_ep_param(ep, param, buf); \
3991 else \
3992 rc = t->get_conn_param(conn, param, buf); \
3993 mutex_unlock(&conn->ep_mutex); \
3994 return rc; \
3995 }
3996
3997 #define iscsi_conn_ep_attr(field, param) \
3998 iscsi_conn_ep_attr_show(param) \
3999 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
4000 show_conn_ep_param_##param, NULL);
4001
4002 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
4003 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
4004
4005 static struct attribute *iscsi_conn_attrs[] = {
4006 &dev_attr_conn_max_recv_dlength.attr,
4007 &dev_attr_conn_max_xmit_dlength.attr,
4008 &dev_attr_conn_header_digest.attr,
4009 &dev_attr_conn_data_digest.attr,
4010 &dev_attr_conn_ifmarker.attr,
4011 &dev_attr_conn_ofmarker.attr,
4012 &dev_attr_conn_address.attr,
4013 &dev_attr_conn_port.attr,
4014 &dev_attr_conn_exp_statsn.attr,
4015 &dev_attr_conn_persistent_address.attr,
4016 &dev_attr_conn_persistent_port.attr,
4017 &dev_attr_conn_ping_tmo.attr,
4018 &dev_attr_conn_recv_tmo.attr,
4019 &dev_attr_conn_local_port.attr,
4020 &dev_attr_conn_statsn.attr,
4021 &dev_attr_conn_keepalive_tmo.attr,
4022 &dev_attr_conn_max_segment_size.attr,
4023 &dev_attr_conn_tcp_timestamp_stat.attr,
4024 &dev_attr_conn_tcp_wsf_disable.attr,
4025 &dev_attr_conn_tcp_nagle_disable.attr,
4026 &dev_attr_conn_tcp_timer_scale.attr,
4027 &dev_attr_conn_tcp_timestamp_enable.attr,
4028 &dev_attr_conn_fragment_disable.attr,
4029 &dev_attr_conn_ipv4_tos.attr,
4030 &dev_attr_conn_ipv6_traffic_class.attr,
4031 &dev_attr_conn_ipv6_flow_label.attr,
4032 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4033 &dev_attr_conn_tcp_xmit_wsf.attr,
4034 &dev_attr_conn_tcp_recv_wsf.attr,
4035 &dev_attr_conn_local_ipaddr.attr,
4036 &dev_attr_conn_state.attr,
4037 NULL,
4038 };
4039
4040 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4041 struct attribute *attr, int i)
4042 {
4043 struct device *cdev = container_of(kobj, struct device, kobj);
4044 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4045 struct iscsi_transport *t = conn->transport;
4046 int param;
4047
4048 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4049 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4050 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4051 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4052 else if (attr == &dev_attr_conn_header_digest.attr)
4053 param = ISCSI_PARAM_HDRDGST_EN;
4054 else if (attr == &dev_attr_conn_data_digest.attr)
4055 param = ISCSI_PARAM_DATADGST_EN;
4056 else if (attr == &dev_attr_conn_ifmarker.attr)
4057 param = ISCSI_PARAM_IFMARKER_EN;
4058 else if (attr == &dev_attr_conn_ofmarker.attr)
4059 param = ISCSI_PARAM_OFMARKER_EN;
4060 else if (attr == &dev_attr_conn_address.attr)
4061 param = ISCSI_PARAM_CONN_ADDRESS;
4062 else if (attr == &dev_attr_conn_port.attr)
4063 param = ISCSI_PARAM_CONN_PORT;
4064 else if (attr == &dev_attr_conn_exp_statsn.attr)
4065 param = ISCSI_PARAM_EXP_STATSN;
4066 else if (attr == &dev_attr_conn_persistent_address.attr)
4067 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4068 else if (attr == &dev_attr_conn_persistent_port.attr)
4069 param = ISCSI_PARAM_PERSISTENT_PORT;
4070 else if (attr == &dev_attr_conn_ping_tmo.attr)
4071 param = ISCSI_PARAM_PING_TMO;
4072 else if (attr == &dev_attr_conn_recv_tmo.attr)
4073 param = ISCSI_PARAM_RECV_TMO;
4074 else if (attr == &dev_attr_conn_local_port.attr)
4075 param = ISCSI_PARAM_LOCAL_PORT;
4076 else if (attr == &dev_attr_conn_statsn.attr)
4077 param = ISCSI_PARAM_STATSN;
4078 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4079 param = ISCSI_PARAM_KEEPALIVE_TMO;
4080 else if (attr == &dev_attr_conn_max_segment_size.attr)
4081 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4082 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4083 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4084 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4085 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4086 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4087 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4088 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4089 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4090 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4091 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4092 else if (attr == &dev_attr_conn_fragment_disable.attr)
4093 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4094 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4095 param = ISCSI_PARAM_IPV4_TOS;
4096 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4097 param = ISCSI_PARAM_IPV6_TC;
4098 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4099 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4100 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4101 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4102 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4103 param = ISCSI_PARAM_TCP_XMIT_WSF;
4104 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4105 param = ISCSI_PARAM_TCP_RECV_WSF;
4106 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4107 param = ISCSI_PARAM_LOCAL_IPADDR;
4108 else if (attr == &dev_attr_conn_state.attr)
4109 return S_IRUGO;
4110 else {
4111 WARN_ONCE(1, "Invalid conn attr");
4112 return 0;
4113 }
4114
4115 return t->attr_is_visible(ISCSI_PARAM, param);
4116 }
4117
4118 static struct attribute_group iscsi_conn_group = {
4119 .attrs = iscsi_conn_attrs,
4120 .is_visible = iscsi_conn_attr_is_visible,
4121 };
4122
4123 /*
4124 * iSCSI session attrs
4125 */
4126 #define iscsi_session_attr_show(param, perm) \
4127 static ssize_t \
4128 show_session_param_##param(struct device *dev, \
4129 struct device_attribute *attr, char *buf) \
4130 { \
4131 struct iscsi_cls_session *session = \
4132 iscsi_dev_to_session(dev->parent); \
4133 struct iscsi_transport *t = session->transport; \
4134 \
4135 if (perm && !capable(CAP_SYS_ADMIN)) \
4136 return -EACCES; \
4137 return t->get_session_param(session, param, buf); \
4138 }
4139
4140 #define iscsi_session_attr(field, param, perm) \
4141 iscsi_session_attr_show(param, perm) \
4142 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4143 NULL);
4144 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4145 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4146 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4147 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4148 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4149 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4150 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4151 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4152 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4153 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4154 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4155 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4156 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4157 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4158 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4159 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4160 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4161 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4162 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4163 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4164 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4165 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4166 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4167 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4168 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4169 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4170 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4171 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4172 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4173 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4174 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4175 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4176 iscsi_session_attr(discovery_auth_optional,
4177 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4178 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4179 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4180 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4181 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4182 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4183 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4184 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4185
4186 static ssize_t
4187 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4188 char *buf)
4189 {
4190 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4191 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4192 }
4193 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4194 NULL);
4195 static ssize_t
4196 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4197 char *buf)
4198 {
4199 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4200 return sprintf(buf, "%d\n", session->creator);
4201 }
4202 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4203 NULL);
4204 static ssize_t
4205 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4206 char *buf)
4207 {
4208 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4209 return sprintf(buf, "%d\n", session->target_id);
4210 }
4211 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4212 show_priv_session_target_id, NULL);
4213
4214 #define iscsi_priv_session_attr_show(field, format) \
4215 static ssize_t \
4216 show_priv_session_##field(struct device *dev, \
4217 struct device_attribute *attr, char *buf) \
4218 { \
4219 struct iscsi_cls_session *session = \
4220 iscsi_dev_to_session(dev->parent); \
4221 if (session->field == -1) \
4222 return sprintf(buf, "off\n"); \
4223 return sprintf(buf, format"\n", session->field); \
4224 }
4225
4226 #define iscsi_priv_session_attr_store(field) \
4227 static ssize_t \
4228 store_priv_session_##field(struct device *dev, \
4229 struct device_attribute *attr, \
4230 const char *buf, size_t count) \
4231 { \
4232 int val; \
4233 char *cp; \
4234 struct iscsi_cls_session *session = \
4235 iscsi_dev_to_session(dev->parent); \
4236 if ((session->state == ISCSI_SESSION_FREE) || \
4237 (session->state == ISCSI_SESSION_FAILED)) \
4238 return -EBUSY; \
4239 if (strncmp(buf, "off", 3) == 0) { \
4240 session->field = -1; \
4241 session->field##_sysfs_override = true; \
4242 } else { \
4243 val = simple_strtoul(buf, &cp, 0); \
4244 if (*cp != '\0' && *cp != '\n') \
4245 return -EINVAL; \
4246 session->field = val; \
4247 session->field##_sysfs_override = true; \
4248 } \
4249 return count; \
4250 }
4251
4252 #define iscsi_priv_session_rw_attr(field, format) \
4253 iscsi_priv_session_attr_show(field, format) \
4254 iscsi_priv_session_attr_store(field) \
4255 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4256 show_priv_session_##field, \
4257 store_priv_session_##field)
4258
4259 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4260
4261 static struct attribute *iscsi_session_attrs[] = {
4262 &dev_attr_sess_initial_r2t.attr,
4263 &dev_attr_sess_max_outstanding_r2t.attr,
4264 &dev_attr_sess_immediate_data.attr,
4265 &dev_attr_sess_first_burst_len.attr,
4266 &dev_attr_sess_max_burst_len.attr,
4267 &dev_attr_sess_data_pdu_in_order.attr,
4268 &dev_attr_sess_data_seq_in_order.attr,
4269 &dev_attr_sess_erl.attr,
4270 &dev_attr_sess_targetname.attr,
4271 &dev_attr_sess_tpgt.attr,
4272 &dev_attr_sess_password.attr,
4273 &dev_attr_sess_password_in.attr,
4274 &dev_attr_sess_username.attr,
4275 &dev_attr_sess_username_in.attr,
4276 &dev_attr_sess_fast_abort.attr,
4277 &dev_attr_sess_abort_tmo.attr,
4278 &dev_attr_sess_lu_reset_tmo.attr,
4279 &dev_attr_sess_tgt_reset_tmo.attr,
4280 &dev_attr_sess_ifacename.attr,
4281 &dev_attr_sess_initiatorname.attr,
4282 &dev_attr_sess_targetalias.attr,
4283 &dev_attr_sess_boot_root.attr,
4284 &dev_attr_sess_boot_nic.attr,
4285 &dev_attr_sess_boot_target.attr,
4286 &dev_attr_priv_sess_recovery_tmo.attr,
4287 &dev_attr_priv_sess_state.attr,
4288 &dev_attr_priv_sess_creator.attr,
4289 &dev_attr_sess_chap_out_idx.attr,
4290 &dev_attr_sess_chap_in_idx.attr,
4291 &dev_attr_priv_sess_target_id.attr,
4292 &dev_attr_sess_auto_snd_tgt_disable.attr,
4293 &dev_attr_sess_discovery_session.attr,
4294 &dev_attr_sess_portal_type.attr,
4295 &dev_attr_sess_chap_auth.attr,
4296 &dev_attr_sess_discovery_logout.attr,
4297 &dev_attr_sess_bidi_chap.attr,
4298 &dev_attr_sess_discovery_auth_optional.attr,
4299 &dev_attr_sess_def_time2wait.attr,
4300 &dev_attr_sess_def_time2retain.attr,
4301 &dev_attr_sess_isid.attr,
4302 &dev_attr_sess_tsid.attr,
4303 &dev_attr_sess_def_taskmgmt_tmo.attr,
4304 &dev_attr_sess_discovery_parent_idx.attr,
4305 &dev_attr_sess_discovery_parent_type.attr,
4306 NULL,
4307 };
4308
4309 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4310 struct attribute *attr, int i)
4311 {
4312 struct device *cdev = container_of(kobj, struct device, kobj);
4313 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4314 struct iscsi_transport *t = session->transport;
4315 int param;
4316
4317 if (attr == &dev_attr_sess_initial_r2t.attr)
4318 param = ISCSI_PARAM_INITIAL_R2T_EN;
4319 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4320 param = ISCSI_PARAM_MAX_R2T;
4321 else if (attr == &dev_attr_sess_immediate_data.attr)
4322 param = ISCSI_PARAM_IMM_DATA_EN;
4323 else if (attr == &dev_attr_sess_first_burst_len.attr)
4324 param = ISCSI_PARAM_FIRST_BURST;
4325 else if (attr == &dev_attr_sess_max_burst_len.attr)
4326 param = ISCSI_PARAM_MAX_BURST;
4327 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4328 param = ISCSI_PARAM_PDU_INORDER_EN;
4329 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4330 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4331 else if (attr == &dev_attr_sess_erl.attr)
4332 param = ISCSI_PARAM_ERL;
4333 else if (attr == &dev_attr_sess_targetname.attr)
4334 param = ISCSI_PARAM_TARGET_NAME;
4335 else if (attr == &dev_attr_sess_tpgt.attr)
4336 param = ISCSI_PARAM_TPGT;
4337 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4338 param = ISCSI_PARAM_CHAP_IN_IDX;
4339 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4340 param = ISCSI_PARAM_CHAP_OUT_IDX;
4341 else if (attr == &dev_attr_sess_password.attr)
4342 param = ISCSI_PARAM_USERNAME;
4343 else if (attr == &dev_attr_sess_password_in.attr)
4344 param = ISCSI_PARAM_USERNAME_IN;
4345 else if (attr == &dev_attr_sess_username.attr)
4346 param = ISCSI_PARAM_PASSWORD;
4347 else if (attr == &dev_attr_sess_username_in.attr)
4348 param = ISCSI_PARAM_PASSWORD_IN;
4349 else if (attr == &dev_attr_sess_fast_abort.attr)
4350 param = ISCSI_PARAM_FAST_ABORT;
4351 else if (attr == &dev_attr_sess_abort_tmo.attr)
4352 param = ISCSI_PARAM_ABORT_TMO;
4353 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4354 param = ISCSI_PARAM_LU_RESET_TMO;
4355 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4356 param = ISCSI_PARAM_TGT_RESET_TMO;
4357 else if (attr == &dev_attr_sess_ifacename.attr)
4358 param = ISCSI_PARAM_IFACE_NAME;
4359 else if (attr == &dev_attr_sess_initiatorname.attr)
4360 param = ISCSI_PARAM_INITIATOR_NAME;
4361 else if (attr == &dev_attr_sess_targetalias.attr)
4362 param = ISCSI_PARAM_TARGET_ALIAS;
4363 else if (attr == &dev_attr_sess_boot_root.attr)
4364 param = ISCSI_PARAM_BOOT_ROOT;
4365 else if (attr == &dev_attr_sess_boot_nic.attr)
4366 param = ISCSI_PARAM_BOOT_NIC;
4367 else if (attr == &dev_attr_sess_boot_target.attr)
4368 param = ISCSI_PARAM_BOOT_TARGET;
4369 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4370 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4371 else if (attr == &dev_attr_sess_discovery_session.attr)
4372 param = ISCSI_PARAM_DISCOVERY_SESS;
4373 else if (attr == &dev_attr_sess_portal_type.attr)
4374 param = ISCSI_PARAM_PORTAL_TYPE;
4375 else if (attr == &dev_attr_sess_chap_auth.attr)
4376 param = ISCSI_PARAM_CHAP_AUTH_EN;
4377 else if (attr == &dev_attr_sess_discovery_logout.attr)
4378 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4379 else if (attr == &dev_attr_sess_bidi_chap.attr)
4380 param = ISCSI_PARAM_BIDI_CHAP_EN;
4381 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4382 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4383 else if (attr == &dev_attr_sess_def_time2wait.attr)
4384 param = ISCSI_PARAM_DEF_TIME2WAIT;
4385 else if (attr == &dev_attr_sess_def_time2retain.attr)
4386 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4387 else if (attr == &dev_attr_sess_isid.attr)
4388 param = ISCSI_PARAM_ISID;
4389 else if (attr == &dev_attr_sess_tsid.attr)
4390 param = ISCSI_PARAM_TSID;
4391 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4392 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4393 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4394 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4395 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4396 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4397 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4398 return S_IRUGO | S_IWUSR;
4399 else if (attr == &dev_attr_priv_sess_state.attr)
4400 return S_IRUGO;
4401 else if (attr == &dev_attr_priv_sess_creator.attr)
4402 return S_IRUGO;
4403 else if (attr == &dev_attr_priv_sess_target_id.attr)
4404 return S_IRUGO;
4405 else {
4406 WARN_ONCE(1, "Invalid session attr");
4407 return 0;
4408 }
4409
4410 return t->attr_is_visible(ISCSI_PARAM, param);
4411 }
4412
4413 static struct attribute_group iscsi_session_group = {
4414 .attrs = iscsi_session_attrs,
4415 .is_visible = iscsi_session_attr_is_visible,
4416 };
4417
4418 /*
4419 * iSCSI host attrs
4420 */
4421 #define iscsi_host_attr_show(param) \
4422 static ssize_t \
4423 show_host_param_##param(struct device *dev, \
4424 struct device_attribute *attr, char *buf) \
4425 { \
4426 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4427 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4428 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4429 }
4430
4431 #define iscsi_host_attr(field, param) \
4432 iscsi_host_attr_show(param) \
4433 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4434 NULL);
4435
4436 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4437 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4438 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4439 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4440 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4441 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4442
4443 static struct attribute *iscsi_host_attrs[] = {
4444 &dev_attr_host_netdev.attr,
4445 &dev_attr_host_hwaddress.attr,
4446 &dev_attr_host_ipaddress.attr,
4447 &dev_attr_host_initiatorname.attr,
4448 &dev_attr_host_port_state.attr,
4449 &dev_attr_host_port_speed.attr,
4450 NULL,
4451 };
4452
4453 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4454 struct attribute *attr, int i)
4455 {
4456 struct device *cdev = container_of(kobj, struct device, kobj);
4457 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4458 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4459 int param;
4460
4461 if (attr == &dev_attr_host_netdev.attr)
4462 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4463 else if (attr == &dev_attr_host_hwaddress.attr)
4464 param = ISCSI_HOST_PARAM_HWADDRESS;
4465 else if (attr == &dev_attr_host_ipaddress.attr)
4466 param = ISCSI_HOST_PARAM_IPADDRESS;
4467 else if (attr == &dev_attr_host_initiatorname.attr)
4468 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4469 else if (attr == &dev_attr_host_port_state.attr)
4470 param = ISCSI_HOST_PARAM_PORT_STATE;
4471 else if (attr == &dev_attr_host_port_speed.attr)
4472 param = ISCSI_HOST_PARAM_PORT_SPEED;
4473 else {
4474 WARN_ONCE(1, "Invalid host attr");
4475 return 0;
4476 }
4477
4478 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4479 }
4480
4481 static struct attribute_group iscsi_host_group = {
4482 .attrs = iscsi_host_attrs,
4483 .is_visible = iscsi_host_attr_is_visible,
4484 };
4485
4486 /* convert iscsi_port_speed values to ascii string name */
4487 static const struct {
4488 enum iscsi_port_speed value;
4489 char *name;
4490 } iscsi_port_speed_names[] = {
4491 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4492 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4493 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4494 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4495 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4496 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4497 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4498 };
4499
4500 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4501 {
4502 int i;
4503 char *speed = "Unknown!";
4504 struct iscsi_cls_host *ihost = shost->shost_data;
4505 uint32_t port_speed = ihost->port_speed;
4506
4507 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4508 if (iscsi_port_speed_names[i].value & port_speed) {
4509 speed = iscsi_port_speed_names[i].name;
4510 break;
4511 }
4512 }
4513 return speed;
4514 }
4515 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4516
4517 /* convert iscsi_port_state values to ascii string name */
4518 static const struct {
4519 enum iscsi_port_state value;
4520 char *name;
4521 } iscsi_port_state_names[] = {
4522 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4523 {ISCSI_PORT_STATE_UP, "LINK UP" },
4524 };
4525
4526 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4527 {
4528 int i;
4529 char *state = "Unknown!";
4530 struct iscsi_cls_host *ihost = shost->shost_data;
4531 uint32_t port_state = ihost->port_state;
4532
4533 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4534 if (iscsi_port_state_names[i].value & port_state) {
4535 state = iscsi_port_state_names[i].name;
4536 break;
4537 }
4538 }
4539 return state;
4540 }
4541 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4542
4543 static int iscsi_session_match(struct attribute_container *cont,
4544 struct device *dev)
4545 {
4546 struct iscsi_cls_session *session;
4547 struct Scsi_Host *shost;
4548 struct iscsi_internal *priv;
4549
4550 if (!iscsi_is_session_dev(dev))
4551 return 0;
4552
4553 session = iscsi_dev_to_session(dev);
4554 shost = iscsi_session_to_shost(session);
4555 if (!shost->transportt)
4556 return 0;
4557
4558 priv = to_iscsi_internal(shost->transportt);
4559 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4560 return 0;
4561
4562 return &priv->session_cont.ac == cont;
4563 }
4564
4565 static int iscsi_conn_match(struct attribute_container *cont,
4566 struct device *dev)
4567 {
4568 struct iscsi_cls_session *session;
4569 struct iscsi_cls_conn *conn;
4570 struct Scsi_Host *shost;
4571 struct iscsi_internal *priv;
4572
4573 if (!iscsi_is_conn_dev(dev))
4574 return 0;
4575
4576 conn = iscsi_dev_to_conn(dev);
4577 session = iscsi_dev_to_session(conn->dev.parent);
4578 shost = iscsi_session_to_shost(session);
4579
4580 if (!shost->transportt)
4581 return 0;
4582
4583 priv = to_iscsi_internal(shost->transportt);
4584 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4585 return 0;
4586
4587 return &priv->conn_cont.ac == cont;
4588 }
4589
4590 static int iscsi_host_match(struct attribute_container *cont,
4591 struct device *dev)
4592 {
4593 struct Scsi_Host *shost;
4594 struct iscsi_internal *priv;
4595
4596 if (!scsi_is_host_device(dev))
4597 return 0;
4598
4599 shost = dev_to_shost(dev);
4600 if (!shost->transportt ||
4601 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4602 return 0;
4603
4604 priv = to_iscsi_internal(shost->transportt);
4605 return &priv->t.host_attrs.ac == cont;
4606 }
4607
4608 struct scsi_transport_template *
4609 iscsi_register_transport(struct iscsi_transport *tt)
4610 {
4611 struct iscsi_internal *priv;
4612 unsigned long flags;
4613 int err;
4614
4615 BUG_ON(!tt);
4616
4617 priv = iscsi_if_transport_lookup(tt);
4618 if (priv)
4619 return NULL;
4620
4621 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4622 if (!priv)
4623 return NULL;
4624 INIT_LIST_HEAD(&priv->list);
4625 priv->iscsi_transport = tt;
4626 priv->t.user_scan = iscsi_user_scan;
4627 priv->t.create_work_queue = 1;
4628
4629 priv->dev.class = &iscsi_transport_class;
4630 dev_set_name(&priv->dev, "%s", tt->name);
4631 err = device_register(&priv->dev);
4632 if (err)
4633 goto free_priv;
4634
4635 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4636 if (err)
4637 goto unregister_dev;
4638
4639 /* host parameters */
4640 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4641 priv->t.host_attrs.ac.match = iscsi_host_match;
4642 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4643 priv->t.host_size = sizeof(struct iscsi_cls_host);
4644 transport_container_register(&priv->t.host_attrs);
4645
4646 /* connection parameters */
4647 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4648 priv->conn_cont.ac.match = iscsi_conn_match;
4649 priv->conn_cont.ac.grp = &iscsi_conn_group;
4650 transport_container_register(&priv->conn_cont);
4651
4652 /* session parameters */
4653 priv->session_cont.ac.class = &iscsi_session_class.class;
4654 priv->session_cont.ac.match = iscsi_session_match;
4655 priv->session_cont.ac.grp = &iscsi_session_group;
4656 transport_container_register(&priv->session_cont);
4657
4658 spin_lock_irqsave(&iscsi_transport_lock, flags);
4659 list_add(&priv->list, &iscsi_transports);
4660 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4661
4662 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4663 return &priv->t;
4664
4665 unregister_dev:
4666 device_unregister(&priv->dev);
4667 return NULL;
4668 free_priv:
4669 kfree(priv);
4670 return NULL;
4671 }
4672 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4673
4674 int iscsi_unregister_transport(struct iscsi_transport *tt)
4675 {
4676 struct iscsi_internal *priv;
4677 unsigned long flags;
4678
4679 BUG_ON(!tt);
4680
4681 mutex_lock(&rx_queue_mutex);
4682
4683 priv = iscsi_if_transport_lookup(tt);
4684 BUG_ON (!priv);
4685
4686 spin_lock_irqsave(&iscsi_transport_lock, flags);
4687 list_del(&priv->list);
4688 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4689
4690 transport_container_unregister(&priv->conn_cont);
4691 transport_container_unregister(&priv->session_cont);
4692 transport_container_unregister(&priv->t.host_attrs);
4693
4694 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4695 device_unregister(&priv->dev);
4696 mutex_unlock(&rx_queue_mutex);
4697
4698 return 0;
4699 }
4700 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4701
4702 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4703 struct device *dev, const char *fmt, ...)
4704 {
4705 struct va_format vaf;
4706 va_list args;
4707
4708 va_start(args, fmt);
4709 vaf.fmt = fmt;
4710 vaf.va = &args;
4711 trace(dev, &vaf);
4712 va_end(args);
4713 }
4714 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4715
4716 static __init int iscsi_transport_init(void)
4717 {
4718 int err;
4719 struct netlink_kernel_cfg cfg = {
4720 .groups = 1,
4721 .input = iscsi_if_rx,
4722 };
4723 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4724 ISCSI_TRANSPORT_VERSION);
4725
4726 atomic_set(&iscsi_session_nr, 0);
4727
4728 err = class_register(&iscsi_transport_class);
4729 if (err)
4730 return err;
4731
4732 err = class_register(&iscsi_endpoint_class);
4733 if (err)
4734 goto unregister_transport_class;
4735
4736 err = class_register(&iscsi_iface_class);
4737 if (err)
4738 goto unregister_endpoint_class;
4739
4740 err = transport_class_register(&iscsi_host_class);
4741 if (err)
4742 goto unregister_iface_class;
4743
4744 err = transport_class_register(&iscsi_connection_class);
4745 if (err)
4746 goto unregister_host_class;
4747
4748 err = transport_class_register(&iscsi_session_class);
4749 if (err)
4750 goto unregister_conn_class;
4751
4752 err = bus_register(&iscsi_flashnode_bus);
4753 if (err)
4754 goto unregister_session_class;
4755
4756 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4757 if (!nls) {
4758 err = -ENOBUFS;
4759 goto unregister_flashnode_bus;
4760 }
4761
4762 iscsi_eh_timer_workq = alloc_workqueue("%s",
4763 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
4764 1, "iscsi_eh");
4765 if (!iscsi_eh_timer_workq) {
4766 err = -ENOMEM;
4767 goto release_nls;
4768 }
4769
4770 iscsi_destroy_workq = alloc_workqueue("%s",
4771 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
4772 1, "iscsi_destroy");
4773 if (!iscsi_destroy_workq) {
4774 err = -ENOMEM;
4775 goto destroy_wq;
4776 }
4777
4778 return 0;
4779
4780 destroy_wq:
4781 destroy_workqueue(iscsi_eh_timer_workq);
4782 release_nls:
4783 netlink_kernel_release(nls);
4784 unregister_flashnode_bus:
4785 bus_unregister(&iscsi_flashnode_bus);
4786 unregister_session_class:
4787 transport_class_unregister(&iscsi_session_class);
4788 unregister_conn_class:
4789 transport_class_unregister(&iscsi_connection_class);
4790 unregister_host_class:
4791 transport_class_unregister(&iscsi_host_class);
4792 unregister_iface_class:
4793 class_unregister(&iscsi_iface_class);
4794 unregister_endpoint_class:
4795 class_unregister(&iscsi_endpoint_class);
4796 unregister_transport_class:
4797 class_unregister(&iscsi_transport_class);
4798 return err;
4799 }
4800
4801 static void __exit iscsi_transport_exit(void)
4802 {
4803 destroy_workqueue(iscsi_destroy_workq);
4804 destroy_workqueue(iscsi_eh_timer_workq);
4805 netlink_kernel_release(nls);
4806 bus_unregister(&iscsi_flashnode_bus);
4807 transport_class_unregister(&iscsi_connection_class);
4808 transport_class_unregister(&iscsi_session_class);
4809 transport_class_unregister(&iscsi_host_class);
4810 class_unregister(&iscsi_endpoint_class);
4811 class_unregister(&iscsi_iface_class);
4812 class_unregister(&iscsi_transport_class);
4813 }
4814
4815 module_init(iscsi_transport_init);
4816 module_exit(iscsi_transport_exit);
4817
4818 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4819 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4820 "Alex Aizman <itn780@yahoo.com>");
4821 MODULE_DESCRIPTION("iSCSI Transport Interface");
4822 MODULE_LICENSE("GPL");
4823 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4824 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux with added FPC-III support