?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_iscsi.c
blobb2a803c512881eaa8fb33863ad01d53c534d48a8
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 static LIST_HEAD(sesslist);
1620 static LIST_HEAD(sessdestroylist);
1621 static DEFINE_SPINLOCK(sesslock);
1622 static LIST_HEAD(connlist);
1623 static LIST_HEAD(connlist_err);
1624 static DEFINE_SPINLOCK(connlock);
1625
1626 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1627 {
1628 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1629 return sess->sid;
1630 }
1631
1632 /*
1633 * Returns the matching session to a given sid
1634 */
1635 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1636 {
1637 unsigned long flags;
1638 struct iscsi_cls_session *sess;
1639
1640 spin_lock_irqsave(&sesslock, flags);
1641 list_for_each_entry(sess, &sesslist, sess_list) {
1642 if (sess->sid == sid) {
1643 spin_unlock_irqrestore(&sesslock, flags);
1644 return sess;
1645 }
1646 }
1647 spin_unlock_irqrestore(&sesslock, flags);
1648 return NULL;
1649 }
1650
1651 /*
1652 * Returns the matching connection to a given sid / cid tuple
1653 */
1654 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1655 {
1656 unsigned long flags;
1657 struct iscsi_cls_conn *conn;
1658
1659 spin_lock_irqsave(&connlock, flags);
1660 list_for_each_entry(conn, &connlist, conn_list) {
1661 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1662 spin_unlock_irqrestore(&connlock, flags);
1663 return conn;
1664 }
1665 }
1666 spin_unlock_irqrestore(&connlock, flags);
1667 return NULL;
1668 }
1669
1670 /*
1671 * The following functions can be used by LLDs that allocate
1672 * their own scsi_hosts or by software iscsi LLDs
1673 */
1674 static struct {
1675 int value;
1676 char *name;
1677 } iscsi_session_state_names[] = {
1678 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1679 { ISCSI_SESSION_FAILED, "FAILED" },
1680 { ISCSI_SESSION_FREE, "FREE" },
1681 };
1682
1683 static const char *iscsi_session_state_name(int state)
1684 {
1685 int i;
1686 char *name = NULL;
1687
1688 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1689 if (iscsi_session_state_names[i].value == state) {
1690 name = iscsi_session_state_names[i].name;
1691 break;
1692 }
1693 }
1694 return name;
1695 }
1696
1697 int iscsi_session_chkready(struct iscsi_cls_session *session)
1698 {
1699 unsigned long flags;
1700 int err;
1701
1702 spin_lock_irqsave(&session->lock, flags);
1703 switch (session->state) {
1704 case ISCSI_SESSION_LOGGED_IN:
1705 err = 0;
1706 break;
1707 case ISCSI_SESSION_FAILED:
1708 err = DID_IMM_RETRY << 16;
1709 break;
1710 case ISCSI_SESSION_FREE:
1711 err = DID_TRANSPORT_FAILFAST << 16;
1712 break;
1713 default:
1714 err = DID_NO_CONNECT << 16;
1715 break;
1716 }
1717 spin_unlock_irqrestore(&session->lock, flags);
1718 return err;
1719 }
1720 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1721
1722 int iscsi_is_session_online(struct iscsi_cls_session *session)
1723 {
1724 unsigned long flags;
1725 int ret = 0;
1726
1727 spin_lock_irqsave(&session->lock, flags);
1728 if (session->state == ISCSI_SESSION_LOGGED_IN)
1729 ret = 1;
1730 spin_unlock_irqrestore(&session->lock, flags);
1731 return ret;
1732 }
1733 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1734
1735 static void iscsi_session_release(struct device *dev)
1736 {
1737 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1738 struct Scsi_Host *shost;
1739
1740 shost = iscsi_session_to_shost(session);
1741 scsi_host_put(shost);
1742 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1743 kfree(session);
1744 }
1745
1746 int iscsi_is_session_dev(const struct device *dev)
1747 {
1748 return dev->release == iscsi_session_release;
1749 }
1750 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1751
1752 static int iscsi_iter_session_fn(struct device *dev, void *data)
1753 {
1754 void (* fn) (struct iscsi_cls_session *) = data;
1755
1756 if (!iscsi_is_session_dev(dev))
1757 return 0;
1758 fn(iscsi_dev_to_session(dev));
1759 return 0;
1760 }
1761
1762 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1763 void (*fn)(struct iscsi_cls_session *))
1764 {
1765 device_for_each_child(&shost->shost_gendev, fn,
1766 iscsi_iter_session_fn);
1767 }
1768 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1769
1770 /**
1771 * iscsi_scan_finished - helper to report when running scans are done
1772 * @shost: scsi host
1773 * @time: scan run time
1774 *
1775 * This function can be used by drives like qla4xxx to report to the scsi
1776 * layer when the scans it kicked off at module load time are done.
1777 */
1778 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1779 {
1780 struct iscsi_cls_host *ihost = shost->shost_data;
1781 /*
1782 * qla4xxx will have kicked off some session unblocks before calling
1783 * scsi_scan_host, so just wait for them to complete.
1784 */
1785 return !atomic_read(&ihost->nr_scans);
1786 }
1787 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1788
1789 struct iscsi_scan_data {
1790 unsigned int channel;
1791 unsigned int id;
1792 u64 lun;
1793 enum scsi_scan_mode rescan;
1794 };
1795
1796 static int iscsi_user_scan_session(struct device *dev, void *data)
1797 {
1798 struct iscsi_scan_data *scan_data = data;
1799 struct iscsi_cls_session *session;
1800 struct Scsi_Host *shost;
1801 struct iscsi_cls_host *ihost;
1802 unsigned long flags;
1803 unsigned int id;
1804
1805 if (!iscsi_is_session_dev(dev))
1806 return 0;
1807
1808 session = iscsi_dev_to_session(dev);
1809
1810 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1811
1812 shost = iscsi_session_to_shost(session);
1813 ihost = shost->shost_data;
1814
1815 mutex_lock(&ihost->mutex);
1816 spin_lock_irqsave(&session->lock, flags);
1817 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1818 spin_unlock_irqrestore(&session->lock, flags);
1819 goto user_scan_exit;
1820 }
1821 id = session->target_id;
1822 spin_unlock_irqrestore(&session->lock, flags);
1823
1824 if (id != ISCSI_MAX_TARGET) {
1825 if ((scan_data->channel == SCAN_WILD_CARD ||
1826 scan_data->channel == 0) &&
1827 (scan_data->id == SCAN_WILD_CARD ||
1828 scan_data->id == id))
1829 scsi_scan_target(&session->dev, 0, id,
1830 scan_data->lun, scan_data->rescan);
1831 }
1832
1833 user_scan_exit:
1834 mutex_unlock(&ihost->mutex);
1835 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1836 return 0;
1837 }
1838
1839 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1840 uint id, u64 lun)
1841 {
1842 struct iscsi_scan_data scan_data;
1843
1844 scan_data.channel = channel;
1845 scan_data.id = id;
1846 scan_data.lun = lun;
1847 scan_data.rescan = SCSI_SCAN_MANUAL;
1848
1849 return device_for_each_child(&shost->shost_gendev, &scan_data,
1850 iscsi_user_scan_session);
1851 }
1852
1853 static void iscsi_scan_session(struct work_struct *work)
1854 {
1855 struct iscsi_cls_session *session =
1856 container_of(work, struct iscsi_cls_session, scan_work);
1857 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1858 struct iscsi_cls_host *ihost = shost->shost_data;
1859 struct iscsi_scan_data scan_data;
1860
1861 scan_data.channel = 0;
1862 scan_data.id = SCAN_WILD_CARD;
1863 scan_data.lun = SCAN_WILD_CARD;
1864 scan_data.rescan = SCSI_SCAN_RESCAN;
1865
1866 iscsi_user_scan_session(&session->dev, &scan_data);
1867 atomic_dec(&ihost->nr_scans);
1868 }
1869
1870 /**
1871 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1872 * @cmd: scsi cmd passed to scsi eh handler
1873 *
1874 * If the session is down this function will wait for the recovery
1875 * timer to fire or for the session to be logged back in. If the
1876 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1877 * should pass this error value to the scsi eh.
1878 */
1879 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1880 {
1881 struct iscsi_cls_session *session =
1882 starget_to_session(scsi_target(cmd->device));
1883 unsigned long flags;
1884 int ret = 0;
1885
1886 spin_lock_irqsave(&session->lock, flags);
1887 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1888 if (session->state == ISCSI_SESSION_FREE) {
1889 ret = FAST_IO_FAIL;
1890 break;
1891 }
1892 spin_unlock_irqrestore(&session->lock, flags);
1893 msleep(1000);
1894 spin_lock_irqsave(&session->lock, flags);
1895 }
1896 spin_unlock_irqrestore(&session->lock, flags);
1897 return ret;
1898 }
1899 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1900
1901 static void session_recovery_timedout(struct work_struct *work)
1902 {
1903 struct iscsi_cls_session *session =
1904 container_of(work, struct iscsi_cls_session,
1905 recovery_work.work);
1906 unsigned long flags;
1907
1908 iscsi_cls_session_printk(KERN_INFO, session,
1909 "session recovery timed out after %d secs\n",
1910 session->recovery_tmo);
1911
1912 spin_lock_irqsave(&session->lock, flags);
1913 switch (session->state) {
1914 case ISCSI_SESSION_FAILED:
1915 session->state = ISCSI_SESSION_FREE;
1916 break;
1917 case ISCSI_SESSION_LOGGED_IN:
1918 case ISCSI_SESSION_FREE:
1919 /* we raced with the unblock's flush */
1920 spin_unlock_irqrestore(&session->lock, flags);
1921 return;
1922 }
1923 spin_unlock_irqrestore(&session->lock, flags);
1924
1925 if (session->transport->session_recovery_timedout)
1926 session->transport->session_recovery_timedout(session);
1927
1928 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1929 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1930 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1931 }
1932
1933 static void __iscsi_unblock_session(struct work_struct *work)
1934 {
1935 struct iscsi_cls_session *session =
1936 container_of(work, struct iscsi_cls_session,
1937 unblock_work);
1938 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1939 struct iscsi_cls_host *ihost = shost->shost_data;
1940 unsigned long flags;
1941
1942 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1943 /*
1944 * The recovery and unblock work get run from the same workqueue,
1945 * so try to cancel it if it was going to run after this unblock.
1946 */
1947 cancel_delayed_work(&session->recovery_work);
1948 spin_lock_irqsave(&session->lock, flags);
1949 session->state = ISCSI_SESSION_LOGGED_IN;
1950 spin_unlock_irqrestore(&session->lock, flags);
1951 /* start IO */
1952 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1953 /*
1954 * Only do kernel scanning if the driver is properly hooked into
1955 * the async scanning code (drivers like iscsi_tcp do login and
1956 * scanning from userspace).
1957 */
1958 if (shost->hostt->scan_finished) {
1959 if (scsi_queue_work(shost, &session->scan_work))
1960 atomic_inc(&ihost->nr_scans);
1961 }
1962 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1963 }
1964
1965 /**
1966 * iscsi_unblock_session - set a session as logged in and start IO.
1967 * @session: iscsi session
1968 *
1969 * Mark a session as ready to accept IO.
1970 */
1971 void iscsi_unblock_session(struct iscsi_cls_session *session)
1972 {
1973 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1974 /*
1975 * make sure all the events have completed before tell the driver
1976 * it is safe
1977 */
1978 flush_workqueue(iscsi_eh_timer_workq);
1979 }
1980 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1981
1982 static void __iscsi_block_session(struct work_struct *work)
1983 {
1984 struct iscsi_cls_session *session =
1985 container_of(work, struct iscsi_cls_session,
1986 block_work);
1987 unsigned long flags;
1988
1989 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1990 spin_lock_irqsave(&session->lock, flags);
1991 session->state = ISCSI_SESSION_FAILED;
1992 spin_unlock_irqrestore(&session->lock, flags);
1993 scsi_target_block(&session->dev);
1994 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1995 if (session->recovery_tmo >= 0)
1996 queue_delayed_work(iscsi_eh_timer_workq,
1997 &session->recovery_work,
1998 session->recovery_tmo * HZ);
1999 }
2000
2001 void iscsi_block_session(struct iscsi_cls_session *session)
2002 {
2003 queue_work(iscsi_eh_timer_workq, &session->block_work);
2004 }
2005 EXPORT_SYMBOL_GPL(iscsi_block_session);
2006
2007 static void __iscsi_unbind_session(struct work_struct *work)
2008 {
2009 struct iscsi_cls_session *session =
2010 container_of(work, struct iscsi_cls_session,
2011 unbind_work);
2012 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2013 struct iscsi_cls_host *ihost = shost->shost_data;
2014 unsigned long flags;
2015 unsigned int target_id;
2016
2017 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2018
2019 /* Prevent new scans and make sure scanning is not in progress */
2020 mutex_lock(&ihost->mutex);
2021 spin_lock_irqsave(&session->lock, flags);
2022 if (session->target_id == ISCSI_MAX_TARGET) {
2023 spin_unlock_irqrestore(&session->lock, flags);
2024 mutex_unlock(&ihost->mutex);
2025 goto unbind_session_exit;
2026 }
2027
2028 target_id = session->target_id;
2029 session->target_id = ISCSI_MAX_TARGET;
2030 spin_unlock_irqrestore(&session->lock, flags);
2031 mutex_unlock(&ihost->mutex);
2032
2033 if (session->ida_used)
2034 ida_simple_remove(&iscsi_sess_ida, target_id);
2035
2036 scsi_remove_target(&session->dev);
2037
2038 unbind_session_exit:
2039 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2040 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2041 }
2042
2043 static void __iscsi_destroy_session(struct work_struct *work)
2044 {
2045 struct iscsi_cls_session *session =
2046 container_of(work, struct iscsi_cls_session, destroy_work);
2047
2048 session->transport->destroy_session(session);
2049 }
2050
2051 struct iscsi_cls_session *
2052 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2053 int dd_size)
2054 {
2055 struct iscsi_cls_session *session;
2056
2057 session = kzalloc(sizeof(*session) + dd_size,
2058 GFP_KERNEL);
2059 if (!session)
2060 return NULL;
2061
2062 session->transport = transport;
2063 session->creator = -1;
2064 session->recovery_tmo = 120;
2065 session->recovery_tmo_sysfs_override = false;
2066 session->state = ISCSI_SESSION_FREE;
2067 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2068 INIT_LIST_HEAD(&session->sess_list);
2069 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2070 INIT_WORK(&session->block_work, __iscsi_block_session);
2071 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2072 INIT_WORK(&session->scan_work, iscsi_scan_session);
2073 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2074 spin_lock_init(&session->lock);
2075
2076 /* this is released in the dev's release function */
2077 scsi_host_get(shost);
2078 session->dev.parent = &shost->shost_gendev;
2079 session->dev.release = iscsi_session_release;
2080 device_initialize(&session->dev);
2081 if (dd_size)
2082 session->dd_data = &session[1];
2083
2084 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2085 return session;
2086 }
2087 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2088
2089 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2090 {
2091 unsigned long flags;
2092 int id = 0;
2093 int err;
2094
2095 session->sid = atomic_add_return(1, &iscsi_session_nr);
2096
2097 if (target_id == ISCSI_MAX_TARGET) {
2098 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2099
2100 if (id < 0) {
2101 iscsi_cls_session_printk(KERN_ERR, session,
2102 "Failure in Target ID Allocation\n");
2103 return id;
2104 }
2105 session->target_id = (unsigned int)id;
2106 session->ida_used = true;
2107 } else
2108 session->target_id = target_id;
2109
2110 dev_set_name(&session->dev, "session%u", session->sid);
2111 err = device_add(&session->dev);
2112 if (err) {
2113 iscsi_cls_session_printk(KERN_ERR, session,
2114 "could not register session's dev\n");
2115 goto release_ida;
2116 }
2117 err = transport_register_device(&session->dev);
2118 if (err) {
2119 iscsi_cls_session_printk(KERN_ERR, session,
2120 "could not register transport's dev\n");
2121 goto release_dev;
2122 }
2123
2124 spin_lock_irqsave(&sesslock, flags);
2125 list_add(&session->sess_list, &sesslist);
2126 spin_unlock_irqrestore(&sesslock, flags);
2127
2128 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2129 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2130 return 0;
2131
2132 release_dev:
2133 device_del(&session->dev);
2134 release_ida:
2135 if (session->ida_used)
2136 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2137
2138 return err;
2139 }
2140 EXPORT_SYMBOL_GPL(iscsi_add_session);
2141
2142 /**
2143 * iscsi_create_session - create iscsi class session
2144 * @shost: scsi host
2145 * @transport: iscsi transport
2146 * @dd_size: private driver data size
2147 * @target_id: which target
2148 *
2149 * This can be called from a LLD or iscsi_transport.
2150 */
2151 struct iscsi_cls_session *
2152 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2153 int dd_size, unsigned int target_id)
2154 {
2155 struct iscsi_cls_session *session;
2156
2157 session = iscsi_alloc_session(shost, transport, dd_size);
2158 if (!session)
2159 return NULL;
2160
2161 if (iscsi_add_session(session, target_id)) {
2162 iscsi_free_session(session);
2163 return NULL;
2164 }
2165 return session;
2166 }
2167 EXPORT_SYMBOL_GPL(iscsi_create_session);
2168
2169 static void iscsi_conn_release(struct device *dev)
2170 {
2171 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2172 struct device *parent = conn->dev.parent;
2173
2174 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2175 kfree(conn);
2176 put_device(parent);
2177 }
2178
2179 static int iscsi_is_conn_dev(const struct device *dev)
2180 {
2181 return dev->release == iscsi_conn_release;
2182 }
2183
2184 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2185 {
2186 if (!iscsi_is_conn_dev(dev))
2187 return 0;
2188 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2189 }
2190
2191 void iscsi_remove_session(struct iscsi_cls_session *session)
2192 {
2193 unsigned long flags;
2194 int err;
2195
2196 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2197
2198 spin_lock_irqsave(&sesslock, flags);
2199 list_del(&session->sess_list);
2200 spin_unlock_irqrestore(&sesslock, flags);
2201
2202 /* make sure there are no blocks/unblocks queued */
2203 flush_workqueue(iscsi_eh_timer_workq);
2204 /* make sure the timedout callout is not running */
2205 if (!cancel_delayed_work(&session->recovery_work))
2206 flush_workqueue(iscsi_eh_timer_workq);
2207 /*
2208 * If we are blocked let commands flow again. The lld or iscsi
2209 * layer should set up the queuecommand to fail commands.
2210 * We assume that LLD will not be calling block/unblock while
2211 * removing the session.
2212 */
2213 spin_lock_irqsave(&session->lock, flags);
2214 session->state = ISCSI_SESSION_FREE;
2215 spin_unlock_irqrestore(&session->lock, flags);
2216
2217 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2218 /* flush running scans then delete devices */
2219 flush_work(&session->scan_work);
2220 /* flush running unbind operations */
2221 flush_work(&session->unbind_work);
2222 __iscsi_unbind_session(&session->unbind_work);
2223
2224 /* hw iscsi may not have removed all connections from session */
2225 err = device_for_each_child(&session->dev, NULL,
2226 iscsi_iter_destroy_conn_fn);
2227 if (err)
2228 iscsi_cls_session_printk(KERN_ERR, session,
2229 "Could not delete all connections "
2230 "for session. Error %d.\n", err);
2231
2232 transport_unregister_device(&session->dev);
2233
2234 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2235 device_del(&session->dev);
2236 }
2237 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2238
2239 void iscsi_free_session(struct iscsi_cls_session *session)
2240 {
2241 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2242 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2243 put_device(&session->dev);
2244 }
2245 EXPORT_SYMBOL_GPL(iscsi_free_session);
2246
2247 /**
2248 * iscsi_create_conn - create iscsi class connection
2249 * @session: iscsi cls session
2250 * @dd_size: private driver data size
2251 * @cid: connection id
2252 *
2253 * This can be called from a LLD or iscsi_transport. The connection
2254 * is child of the session so cid must be unique for all connections
2255 * on the session.
2256 *
2257 * Since we do not support MCS, cid will normally be zero. In some cases
2258 * for software iscsi we could be trying to preallocate a connection struct
2259 * in which case there could be two connection structs and cid would be
2260 * non-zero.
2261 */
2262 struct iscsi_cls_conn *
2263 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2264 {
2265 struct iscsi_transport *transport = session->transport;
2266 struct iscsi_cls_conn *conn;
2267 unsigned long flags;
2268 int err;
2269
2270 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2271 if (!conn)
2272 return NULL;
2273 if (dd_size)
2274 conn->dd_data = &conn[1];
2275
2276 mutex_init(&conn->ep_mutex);
2277 INIT_LIST_HEAD(&conn->conn_list);
2278 INIT_LIST_HEAD(&conn->conn_list_err);
2279 conn->transport = transport;
2280 conn->cid = cid;
2281 conn->state = ISCSI_CONN_DOWN;
2282
2283 /* this is released in the dev's release function */
2284 if (!get_device(&session->dev))
2285 goto free_conn;
2286
2287 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2288 conn->dev.parent = &session->dev;
2289 conn->dev.release = iscsi_conn_release;
2290 err = device_register(&conn->dev);
2291 if (err) {
2292 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2293 "register connection's dev\n");
2294 goto release_parent_ref;
2295 }
2296 err = transport_register_device(&conn->dev);
2297 if (err) {
2298 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2299 "register transport's dev\n");
2300 goto release_conn_ref;
2301 }
2302
2303 spin_lock_irqsave(&connlock, flags);
2304 list_add(&conn->conn_list, &connlist);
2305 spin_unlock_irqrestore(&connlock, flags);
2306
2307 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2308 return conn;
2309
2310 release_conn_ref:
2311 put_device(&conn->dev);
2312 release_parent_ref:
2313 put_device(&session->dev);
2314 free_conn:
2315 kfree(conn);
2316 return NULL;
2317 }
2318
2319 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2320
2321 /**
2322 * iscsi_destroy_conn - destroy iscsi class connection
2323 * @conn: iscsi cls session
2324 *
2325 * This can be called from a LLD or iscsi_transport.
2326 */
2327 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2328 {
2329 unsigned long flags;
2330
2331 spin_lock_irqsave(&connlock, flags);
2332 list_del(&conn->conn_list);
2333 list_del(&conn->conn_list_err);
2334 spin_unlock_irqrestore(&connlock, flags);
2335
2336 transport_unregister_device(&conn->dev);
2337 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2338 device_unregister(&conn->dev);
2339 return 0;
2340 }
2341 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2342
2343 /*
2344 * iscsi interface functions
2345 */
2346 static struct iscsi_internal *
2347 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2348 {
2349 struct iscsi_internal *priv;
2350 unsigned long flags;
2351
2352 spin_lock_irqsave(&iscsi_transport_lock, flags);
2353 list_for_each_entry(priv, &iscsi_transports, list) {
2354 if (tt == priv->iscsi_transport) {
2355 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2356 return priv;
2357 }
2358 }
2359 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2360 return NULL;
2361 }
2362
2363 static int
2364 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2365 {
2366 return nlmsg_multicast(nls, skb, 0, group, gfp);
2367 }
2368
2369 static int
2370 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2371 {
2372 return nlmsg_unicast(nls, skb, portid);
2373 }
2374
2375 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2376 char *data, uint32_t data_size)
2377 {
2378 struct nlmsghdr *nlh;
2379 struct sk_buff *skb;
2380 struct iscsi_uevent *ev;
2381 char *pdu;
2382 struct iscsi_internal *priv;
2383 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2384 data_size);
2385
2386 priv = iscsi_if_transport_lookup(conn->transport);
2387 if (!priv)
2388 return -EINVAL;
2389
2390 skb = alloc_skb(len, GFP_ATOMIC);
2391 if (!skb) {
2392 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2393 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2394 "control PDU: OOM\n");
2395 return -ENOMEM;
2396 }
2397
2398 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2399 ev = nlmsg_data(nlh);
2400 memset(ev, 0, sizeof(*ev));
2401 ev->transport_handle = iscsi_handle(conn->transport);
2402 ev->type = ISCSI_KEVENT_RECV_PDU;
2403 ev->r.recv_req.cid = conn->cid;
2404 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2405 pdu = (char*)ev + sizeof(*ev);
2406 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2407 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2408
2409 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2410 }
2411 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2412
2413 int iscsi_offload_mesg(struct Scsi_Host *shost,
2414 struct iscsi_transport *transport, uint32_t type,
2415 char *data, uint16_t data_size)
2416 {
2417 struct nlmsghdr *nlh;
2418 struct sk_buff *skb;
2419 struct iscsi_uevent *ev;
2420 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2421
2422 skb = alloc_skb(len, GFP_ATOMIC);
2423 if (!skb) {
2424 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2425 return -ENOMEM;
2426 }
2427
2428 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2429 ev = nlmsg_data(nlh);
2430 memset(ev, 0, sizeof(*ev));
2431 ev->type = type;
2432 ev->transport_handle = iscsi_handle(transport);
2433 switch (type) {
2434 case ISCSI_KEVENT_PATH_REQ:
2435 ev->r.req_path.host_no = shost->host_no;
2436 break;
2437 case ISCSI_KEVENT_IF_DOWN:
2438 ev->r.notify_if_down.host_no = shost->host_no;
2439 break;
2440 }
2441
2442 memcpy((char *)ev + sizeof(*ev), data, data_size);
2443
2444 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2445 }
2446 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2447
2448 static void stop_conn_work_fn(struct work_struct *work)
2449 {
2450 struct iscsi_cls_conn *conn, *tmp;
2451 unsigned long flags;
2452 LIST_HEAD(recovery_list);
2453
2454 spin_lock_irqsave(&connlock, flags);
2455 if (list_empty(&connlist_err)) {
2456 spin_unlock_irqrestore(&connlock, flags);
2457 return;
2458 }
2459 list_splice_init(&connlist_err, &recovery_list);
2460 spin_unlock_irqrestore(&connlock, flags);
2461
2462 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) {
2463 uint32_t sid = iscsi_conn_get_sid(conn);
2464 struct iscsi_cls_session *session;
2465
2466 mutex_lock(&rx_queue_mutex);
2467
2468 session = iscsi_session_lookup(sid);
2469 if (session) {
2470 if (system_state != SYSTEM_RUNNING) {
2471 session->recovery_tmo = 0;
2472 conn->transport->stop_conn(conn,
2473 STOP_CONN_TERM);
2474 } else {
2475 conn->transport->stop_conn(conn,
2476 STOP_CONN_RECOVER);
2477 }
2478 }
2479
2480 list_del_init(&conn->conn_list_err);
2481
2482 mutex_unlock(&rx_queue_mutex);
2483
2484 /* we don't want to hold rx_queue_mutex for too long,
2485 * for instance if many conns failed at the same time,
2486 * since this stall other iscsi maintenance operations.
2487 * Give other users a chance to proceed.
2488 */
2489 cond_resched();
2490 }
2491 }
2492
2493 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2494 {
2495 struct nlmsghdr *nlh;
2496 struct sk_buff *skb;
2497 struct iscsi_uevent *ev;
2498 struct iscsi_internal *priv;
2499 int len = nlmsg_total_size(sizeof(*ev));
2500 unsigned long flags;
2501
2502 spin_lock_irqsave(&connlock, flags);
2503 list_add(&conn->conn_list_err, &connlist_err);
2504 spin_unlock_irqrestore(&connlock, flags);
2505 queue_work(system_unbound_wq, &stop_conn_work);
2506
2507 priv = iscsi_if_transport_lookup(conn->transport);
2508 if (!priv)
2509 return;
2510
2511 skb = alloc_skb(len, GFP_ATOMIC);
2512 if (!skb) {
2513 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2514 "conn error (%d)\n", error);
2515 return;
2516 }
2517
2518 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2519 ev = nlmsg_data(nlh);
2520 ev->transport_handle = iscsi_handle(conn->transport);
2521 ev->type = ISCSI_KEVENT_CONN_ERROR;
2522 ev->r.connerror.error = error;
2523 ev->r.connerror.cid = conn->cid;
2524 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2525
2526 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2527
2528 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2529 error);
2530 }
2531 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2532
2533 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2534 enum iscsi_conn_state state)
2535 {
2536 struct nlmsghdr *nlh;
2537 struct sk_buff *skb;
2538 struct iscsi_uevent *ev;
2539 struct iscsi_internal *priv;
2540 int len = nlmsg_total_size(sizeof(*ev));
2541
2542 priv = iscsi_if_transport_lookup(conn->transport);
2543 if (!priv)
2544 return;
2545
2546 skb = alloc_skb(len, GFP_ATOMIC);
2547 if (!skb) {
2548 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2549 "conn login (%d)\n", state);
2550 return;
2551 }
2552
2553 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2554 ev = nlmsg_data(nlh);
2555 ev->transport_handle = iscsi_handle(conn->transport);
2556 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2557 ev->r.conn_login.state = state;
2558 ev->r.conn_login.cid = conn->cid;
2559 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2560 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2561
2562 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2563 state);
2564 }
2565 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2566
2567 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2568 enum iscsi_host_event_code code, uint32_t data_size,
2569 uint8_t *data)
2570 {
2571 struct nlmsghdr *nlh;
2572 struct sk_buff *skb;
2573 struct iscsi_uevent *ev;
2574 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2575
2576 skb = alloc_skb(len, GFP_NOIO);
2577 if (!skb) {
2578 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2579 host_no, code);
2580 return;
2581 }
2582
2583 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2584 ev = nlmsg_data(nlh);
2585 ev->transport_handle = iscsi_handle(transport);
2586 ev->type = ISCSI_KEVENT_HOST_EVENT;
2587 ev->r.host_event.host_no = host_no;
2588 ev->r.host_event.code = code;
2589 ev->r.host_event.data_size = data_size;
2590
2591 if (data_size)
2592 memcpy((char *)ev + sizeof(*ev), data, data_size);
2593
2594 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2595 }
2596 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2597
2598 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2599 uint32_t status, uint32_t pid, uint32_t data_size,
2600 uint8_t *data)
2601 {
2602 struct nlmsghdr *nlh;
2603 struct sk_buff *skb;
2604 struct iscsi_uevent *ev;
2605 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2606
2607 skb = alloc_skb(len, GFP_NOIO);
2608 if (!skb) {
2609 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2610 return;
2611 }
2612
2613 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2614 ev = nlmsg_data(nlh);
2615 ev->transport_handle = iscsi_handle(transport);
2616 ev->type = ISCSI_KEVENT_PING_COMP;
2617 ev->r.ping_comp.host_no = host_no;
2618 ev->r.ping_comp.status = status;
2619 ev->r.ping_comp.pid = pid;
2620 ev->r.ping_comp.data_size = data_size;
2621 memcpy((char *)ev + sizeof(*ev), data, data_size);
2622
2623 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2624 }
2625 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2626
2627 static int
2628 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2629 {
2630 struct sk_buff *skb;
2631 struct nlmsghdr *nlh;
2632 int len = nlmsg_total_size(size);
2633
2634 skb = alloc_skb(len, GFP_ATOMIC);
2635 if (!skb) {
2636 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2637 return -ENOMEM;
2638 }
2639
2640 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2641 memcpy(nlmsg_data(nlh), payload, size);
2642 return iscsi_unicast_skb(skb, portid);
2643 }
2644
2645 static int
2646 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2647 {
2648 struct iscsi_uevent *ev = nlmsg_data(nlh);
2649 struct iscsi_stats *stats;
2650 struct sk_buff *skbstat;
2651 struct iscsi_cls_conn *conn;
2652 struct nlmsghdr *nlhstat;
2653 struct iscsi_uevent *evstat;
2654 struct iscsi_internal *priv;
2655 int len = nlmsg_total_size(sizeof(*ev) +
2656 sizeof(struct iscsi_stats) +
2657 sizeof(struct iscsi_stats_custom) *
2658 ISCSI_STATS_CUSTOM_MAX);
2659 int err = 0;
2660
2661 priv = iscsi_if_transport_lookup(transport);
2662 if (!priv)
2663 return -EINVAL;
2664
2665 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2666 if (!conn)
2667 return -EEXIST;
2668
2669 do {
2670 int actual_size;
2671
2672 skbstat = alloc_skb(len, GFP_ATOMIC);
2673 if (!skbstat) {
2674 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2675 "deliver stats: OOM\n");
2676 return -ENOMEM;
2677 }
2678
2679 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2680 (len - sizeof(*nlhstat)), 0);
2681 evstat = nlmsg_data(nlhstat);
2682 memset(evstat, 0, sizeof(*evstat));
2683 evstat->transport_handle = iscsi_handle(conn->transport);
2684 evstat->type = nlh->nlmsg_type;
2685 evstat->u.get_stats.cid =
2686 ev->u.get_stats.cid;
2687 evstat->u.get_stats.sid =
2688 ev->u.get_stats.sid;
2689 stats = (struct iscsi_stats *)
2690 ((char*)evstat + sizeof(*evstat));
2691 memset(stats, 0, sizeof(*stats));
2692
2693 transport->get_stats(conn, stats);
2694 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2695 sizeof(struct iscsi_stats) +
2696 sizeof(struct iscsi_stats_custom) *
2697 stats->custom_length);
2698 actual_size -= sizeof(*nlhstat);
2699 actual_size = nlmsg_msg_size(actual_size);
2700 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2701 nlhstat->nlmsg_len = actual_size;
2702
2703 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2704 GFP_ATOMIC);
2705 } while (err < 0 && err != -ECONNREFUSED);
2706
2707 return err;
2708 }
2709
2710 /**
2711 * iscsi_session_event - send session destr. completion event
2712 * @session: iscsi class session
2713 * @event: type of event
2714 */
2715 int iscsi_session_event(struct iscsi_cls_session *session,
2716 enum iscsi_uevent_e event)
2717 {
2718 struct iscsi_internal *priv;
2719 struct Scsi_Host *shost;
2720 struct iscsi_uevent *ev;
2721 struct sk_buff *skb;
2722 struct nlmsghdr *nlh;
2723 int rc, len = nlmsg_total_size(sizeof(*ev));
2724
2725 priv = iscsi_if_transport_lookup(session->transport);
2726 if (!priv)
2727 return -EINVAL;
2728 shost = iscsi_session_to_shost(session);
2729
2730 skb = alloc_skb(len, GFP_KERNEL);
2731 if (!skb) {
2732 iscsi_cls_session_printk(KERN_ERR, session,
2733 "Cannot notify userspace of session "
2734 "event %u\n", event);
2735 return -ENOMEM;
2736 }
2737
2738 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2739 ev = nlmsg_data(nlh);
2740 ev->transport_handle = iscsi_handle(session->transport);
2741
2742 ev->type = event;
2743 switch (event) {
2744 case ISCSI_KEVENT_DESTROY_SESSION:
2745 ev->r.d_session.host_no = shost->host_no;
2746 ev->r.d_session.sid = session->sid;
2747 break;
2748 case ISCSI_KEVENT_CREATE_SESSION:
2749 ev->r.c_session_ret.host_no = shost->host_no;
2750 ev->r.c_session_ret.sid = session->sid;
2751 break;
2752 case ISCSI_KEVENT_UNBIND_SESSION:
2753 ev->r.unbind_session.host_no = shost->host_no;
2754 ev->r.unbind_session.sid = session->sid;
2755 break;
2756 default:
2757 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2758 "%u.\n", event);
2759 kfree_skb(skb);
2760 return -EINVAL;
2761 }
2762
2763 /*
2764 * this will occur if the daemon is not up, so we just warn
2765 * the user and when the daemon is restarted it will handle it
2766 */
2767 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2768 if (rc == -ESRCH)
2769 iscsi_cls_session_printk(KERN_ERR, session,
2770 "Cannot notify userspace of session "
2771 "event %u. Check iscsi daemon\n",
2772 event);
2773
2774 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2775 event, rc);
2776 return rc;
2777 }
2778 EXPORT_SYMBOL_GPL(iscsi_session_event);
2779
2780 static int
2781 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2782 struct iscsi_uevent *ev, pid_t pid,
2783 uint32_t initial_cmdsn, uint16_t cmds_max,
2784 uint16_t queue_depth)
2785 {
2786 struct iscsi_transport *transport = priv->iscsi_transport;
2787 struct iscsi_cls_session *session;
2788 struct Scsi_Host *shost;
2789
2790 session = transport->create_session(ep, cmds_max, queue_depth,
2791 initial_cmdsn);
2792 if (!session)
2793 return -ENOMEM;
2794
2795 session->creator = pid;
2796 shost = iscsi_session_to_shost(session);
2797 ev->r.c_session_ret.host_no = shost->host_no;
2798 ev->r.c_session_ret.sid = session->sid;
2799 ISCSI_DBG_TRANS_SESSION(session,
2800 "Completed creating transport session\n");
2801 return 0;
2802 }
2803
2804 static int
2805 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2806 {
2807 struct iscsi_cls_conn *conn;
2808 struct iscsi_cls_session *session;
2809
2810 session = iscsi_session_lookup(ev->u.c_conn.sid);
2811 if (!session) {
2812 printk(KERN_ERR "iscsi: invalid session %d.\n",
2813 ev->u.c_conn.sid);
2814 return -EINVAL;
2815 }
2816
2817 conn = transport->create_conn(session, ev->u.c_conn.cid);
2818 if (!conn) {
2819 iscsi_cls_session_printk(KERN_ERR, session,
2820 "couldn't create a new connection.");
2821 return -ENOMEM;
2822 }
2823
2824 ev->r.c_conn_ret.sid = session->sid;
2825 ev->r.c_conn_ret.cid = conn->cid;
2826
2827 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2828 return 0;
2829 }
2830
2831 static int
2832 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2833 {
2834 struct iscsi_cls_conn *conn;
2835 unsigned long flags;
2836
2837 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2838 if (!conn)
2839 return -EINVAL;
2840
2841 spin_lock_irqsave(&connlock, flags);
2842 if (!list_empty(&conn->conn_list_err)) {
2843 spin_unlock_irqrestore(&connlock, flags);
2844 return -EAGAIN;
2845 }
2846 spin_unlock_irqrestore(&connlock, flags);
2847
2848 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2849 if (transport->destroy_conn)
2850 transport->destroy_conn(conn);
2851
2852 return 0;
2853 }
2854
2855 static int
2856 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2857 {
2858 char *data = (char*)ev + sizeof(*ev);
2859 struct iscsi_cls_conn *conn;
2860 struct iscsi_cls_session *session;
2861 int err = 0, value = 0;
2862
2863 session = iscsi_session_lookup(ev->u.set_param.sid);
2864 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2865 if (!conn || !session)
2866 return -EINVAL;
2867
2868 switch (ev->u.set_param.param) {
2869 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2870 sscanf(data, "%d", &value);
2871 if (!session->recovery_tmo_sysfs_override)
2872 session->recovery_tmo = value;
2873 break;
2874 default:
2875 err = transport->set_param(conn, ev->u.set_param.param,
2876 data, ev->u.set_param.len);
2877 }
2878
2879 return err;
2880 }
2881
2882 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2883 struct iscsi_uevent *ev, int msg_type)
2884 {
2885 struct iscsi_endpoint *ep;
2886 struct sockaddr *dst_addr;
2887 struct Scsi_Host *shost = NULL;
2888 int non_blocking, err = 0;
2889
2890 if (!transport->ep_connect)
2891 return -EINVAL;
2892
2893 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2894 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2895 if (!shost) {
2896 printk(KERN_ERR "ep connect failed. Could not find "
2897 "host no %u\n",
2898 ev->u.ep_connect_through_host.host_no);
2899 return -ENODEV;
2900 }
2901 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2902 } else
2903 non_blocking = ev->u.ep_connect.non_blocking;
2904
2905 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2906 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2907 if (IS_ERR(ep)) {
2908 err = PTR_ERR(ep);
2909 goto release_host;
2910 }
2911
2912 ev->r.ep_connect_ret.handle = ep->id;
2913 release_host:
2914 if (shost)
2915 scsi_host_put(shost);
2916 return err;
2917 }
2918
2919 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2920 u64 ep_handle)
2921 {
2922 struct iscsi_cls_conn *conn;
2923 struct iscsi_endpoint *ep;
2924
2925 if (!transport->ep_disconnect)
2926 return -EINVAL;
2927
2928 ep = iscsi_lookup_endpoint(ep_handle);
2929 if (!ep)
2930 return -EINVAL;
2931 conn = ep->conn;
2932 if (conn) {
2933 mutex_lock(&conn->ep_mutex);
2934 conn->ep = NULL;
2935 mutex_unlock(&conn->ep_mutex);
2936 }
2937
2938 transport->ep_disconnect(ep);
2939 return 0;
2940 }
2941
2942 static int
2943 iscsi_if_transport_ep(struct iscsi_transport *transport,
2944 struct iscsi_uevent *ev, int msg_type)
2945 {
2946 struct iscsi_endpoint *ep;
2947 int rc = 0;
2948
2949 switch (msg_type) {
2950 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2951 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2952 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2953 break;
2954 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2955 if (!transport->ep_poll)
2956 return -EINVAL;
2957
2958 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2959 if (!ep)
2960 return -EINVAL;
2961
2962 ev->r.retcode = transport->ep_poll(ep,
2963 ev->u.ep_poll.timeout_ms);
2964 break;
2965 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2966 rc = iscsi_if_ep_disconnect(transport,
2967 ev->u.ep_disconnect.ep_handle);
2968 break;
2969 }
2970 return rc;
2971 }
2972
2973 static int
2974 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2975 struct iscsi_uevent *ev)
2976 {
2977 struct Scsi_Host *shost;
2978 struct sockaddr *dst_addr;
2979 int err;
2980
2981 if (!transport->tgt_dscvr)
2982 return -EINVAL;
2983
2984 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2985 if (!shost) {
2986 printk(KERN_ERR "target discovery could not find host no %u\n",
2987 ev->u.tgt_dscvr.host_no);
2988 return -ENODEV;
2989 }
2990
2991
2992 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2993 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2994 ev->u.tgt_dscvr.enable, dst_addr);
2995 scsi_host_put(shost);
2996 return err;
2997 }
2998
2999 static int
3000 iscsi_set_host_param(struct iscsi_transport *transport,
3001 struct iscsi_uevent *ev)
3002 {
3003 char *data = (char*)ev + sizeof(*ev);
3004 struct Scsi_Host *shost;
3005 int err;
3006
3007 if (!transport->set_host_param)
3008 return -ENOSYS;
3009
3010 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3011 if (!shost) {
3012 printk(KERN_ERR "set_host_param could not find host no %u\n",
3013 ev->u.set_host_param.host_no);
3014 return -ENODEV;
3015 }
3016
3017 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3018 data, ev->u.set_host_param.len);
3019 scsi_host_put(shost);
3020 return err;
3021 }
3022
3023 static int
3024 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3025 {
3026 struct Scsi_Host *shost;
3027 struct iscsi_path *params;
3028 int err;
3029
3030 if (!transport->set_path)
3031 return -ENOSYS;
3032
3033 shost = scsi_host_lookup(ev->u.set_path.host_no);
3034 if (!shost) {
3035 printk(KERN_ERR "set path could not find host no %u\n",
3036 ev->u.set_path.host_no);
3037 return -ENODEV;
3038 }
3039
3040 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3041 err = transport->set_path(shost, params);
3042
3043 scsi_host_put(shost);
3044 return err;
3045 }
3046
3047 static int iscsi_session_has_conns(int sid)
3048 {
3049 struct iscsi_cls_conn *conn;
3050 unsigned long flags;
3051 int found = 0;
3052
3053 spin_lock_irqsave(&connlock, flags);
3054 list_for_each_entry(conn, &connlist, conn_list) {
3055 if (iscsi_conn_get_sid(conn) == sid) {
3056 found = 1;
3057 break;
3058 }
3059 }
3060 spin_unlock_irqrestore(&connlock, flags);
3061
3062 return found;
3063 }
3064
3065 static int
3066 iscsi_set_iface_params(struct iscsi_transport *transport,
3067 struct iscsi_uevent *ev, uint32_t len)
3068 {
3069 char *data = (char *)ev + sizeof(*ev);
3070 struct Scsi_Host *shost;
3071 int err;
3072
3073 if (!transport->set_iface_param)
3074 return -ENOSYS;
3075
3076 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3077 if (!shost) {
3078 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3079 ev->u.set_iface_params.host_no);
3080 return -ENODEV;
3081 }
3082
3083 err = transport->set_iface_param(shost, data, len);
3084 scsi_host_put(shost);
3085 return err;
3086 }
3087
3088 static int
3089 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3090 {
3091 struct Scsi_Host *shost;
3092 struct sockaddr *dst_addr;
3093 int err;
3094
3095 if (!transport->send_ping)
3096 return -ENOSYS;
3097
3098 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3099 if (!shost) {
3100 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3101 ev->u.iscsi_ping.host_no);
3102 return -ENODEV;
3103 }
3104
3105 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3106 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3107 ev->u.iscsi_ping.iface_type,
3108 ev->u.iscsi_ping.payload_size,
3109 ev->u.iscsi_ping.pid,
3110 dst_addr);
3111 scsi_host_put(shost);
3112 return err;
3113 }
3114
3115 static int
3116 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3117 {
3118 struct iscsi_uevent *ev = nlmsg_data(nlh);
3119 struct Scsi_Host *shost = NULL;
3120 struct iscsi_chap_rec *chap_rec;
3121 struct iscsi_internal *priv;
3122 struct sk_buff *skbchap;
3123 struct nlmsghdr *nlhchap;
3124 struct iscsi_uevent *evchap;
3125 uint32_t chap_buf_size;
3126 int len, err = 0;
3127 char *buf;
3128
3129 if (!transport->get_chap)
3130 return -EINVAL;
3131
3132 priv = iscsi_if_transport_lookup(transport);
3133 if (!priv)
3134 return -EINVAL;
3135
3136 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3137 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3138
3139 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3140 if (!shost) {
3141 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3142 __func__, ev->u.get_chap.host_no);
3143 return -ENODEV;
3144 }
3145
3146 do {
3147 int actual_size;
3148
3149 skbchap = alloc_skb(len, GFP_KERNEL);
3150 if (!skbchap) {
3151 printk(KERN_ERR "can not deliver chap: OOM\n");
3152 err = -ENOMEM;
3153 goto exit_get_chap;
3154 }
3155
3156 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3157 (len - sizeof(*nlhchap)), 0);
3158 evchap = nlmsg_data(nlhchap);
3159 memset(evchap, 0, sizeof(*evchap));
3160 evchap->transport_handle = iscsi_handle(transport);
3161 evchap->type = nlh->nlmsg_type;
3162 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3163 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3164 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3165 buf = (char *)evchap + sizeof(*evchap);
3166 memset(buf, 0, chap_buf_size);
3167
3168 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3169 &evchap->u.get_chap.num_entries, buf);
3170
3171 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3172 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3173 nlhchap->nlmsg_len = actual_size;
3174
3175 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3176 GFP_KERNEL);
3177 } while (err < 0 && err != -ECONNREFUSED);
3178
3179 exit_get_chap:
3180 scsi_host_put(shost);
3181 return err;
3182 }
3183
3184 static int iscsi_set_chap(struct iscsi_transport *transport,
3185 struct iscsi_uevent *ev, uint32_t len)
3186 {
3187 char *data = (char *)ev + sizeof(*ev);
3188 struct Scsi_Host *shost;
3189 int err = 0;
3190
3191 if (!transport->set_chap)
3192 return -ENOSYS;
3193
3194 shost = scsi_host_lookup(ev->u.set_path.host_no);
3195 if (!shost) {
3196 pr_err("%s could not find host no %u\n",
3197 __func__, ev->u.set_path.host_no);
3198 return -ENODEV;
3199 }
3200
3201 err = transport->set_chap(shost, data, len);
3202 scsi_host_put(shost);
3203 return err;
3204 }
3205
3206 static int iscsi_delete_chap(struct iscsi_transport *transport,
3207 struct iscsi_uevent *ev)
3208 {
3209 struct Scsi_Host *shost;
3210 int err = 0;
3211
3212 if (!transport->delete_chap)
3213 return -ENOSYS;
3214
3215 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3216 if (!shost) {
3217 printk(KERN_ERR "%s could not find host no %u\n",
3218 __func__, ev->u.delete_chap.host_no);
3219 return -ENODEV;
3220 }
3221
3222 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3223 scsi_host_put(shost);
3224 return err;
3225 }
3226
3227 static const struct {
3228 enum iscsi_discovery_parent_type value;
3229 char *name;
3230 } iscsi_discovery_parent_names[] = {
3231 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3232 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3233 {ISCSI_DISC_PARENT_ISNS, "isns" },
3234 };
3235
3236 char *iscsi_get_discovery_parent_name(int parent_type)
3237 {
3238 int i;
3239 char *state = "Unknown!";
3240
3241 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3242 if (iscsi_discovery_parent_names[i].value & parent_type) {
3243 state = iscsi_discovery_parent_names[i].name;
3244 break;
3245 }
3246 }
3247 return state;
3248 }
3249 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3250
3251 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3252 struct iscsi_uevent *ev, uint32_t len)
3253 {
3254 char *data = (char *)ev + sizeof(*ev);
3255 struct Scsi_Host *shost;
3256 struct iscsi_bus_flash_session *fnode_sess;
3257 struct iscsi_bus_flash_conn *fnode_conn;
3258 struct device *dev;
3259 uint32_t idx;
3260 int err = 0;
3261
3262 if (!transport->set_flashnode_param) {
3263 err = -ENOSYS;
3264 goto exit_set_fnode;
3265 }
3266
3267 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3268 if (!shost) {
3269 pr_err("%s could not find host no %u\n",
3270 __func__, ev->u.set_flashnode.host_no);
3271 err = -ENODEV;
3272 goto put_host;
3273 }
3274
3275 idx = ev->u.set_flashnode.flashnode_idx;
3276 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3277 if (!fnode_sess) {
3278 pr_err("%s could not find flashnode %u for host no %u\n",
3279 __func__, idx, ev->u.set_flashnode.host_no);
3280 err = -ENODEV;
3281 goto put_host;
3282 }
3283
3284 dev = iscsi_find_flashnode_conn(fnode_sess);
3285 if (!dev) {
3286 err = -ENODEV;
3287 goto put_sess;
3288 }
3289
3290 fnode_conn = iscsi_dev_to_flash_conn(dev);
3291 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3292 put_device(dev);
3293
3294 put_sess:
3295 put_device(&fnode_sess->dev);
3296
3297 put_host:
3298 scsi_host_put(shost);
3299
3300 exit_set_fnode:
3301 return err;
3302 }
3303
3304 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3305 struct iscsi_uevent *ev, uint32_t len)
3306 {
3307 char *data = (char *)ev + sizeof(*ev);
3308 struct Scsi_Host *shost;
3309 int index;
3310 int err = 0;
3311
3312 if (!transport->new_flashnode) {
3313 err = -ENOSYS;
3314 goto exit_new_fnode;
3315 }
3316
3317 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3318 if (!shost) {
3319 pr_err("%s could not find host no %u\n",
3320 __func__, ev->u.new_flashnode.host_no);
3321 err = -ENODEV;
3322 goto put_host;
3323 }
3324
3325 index = transport->new_flashnode(shost, data, len);
3326
3327 if (index >= 0)
3328 ev->r.new_flashnode_ret.flashnode_idx = index;
3329 else
3330 err = -EIO;
3331
3332 put_host:
3333 scsi_host_put(shost);
3334
3335 exit_new_fnode:
3336 return err;
3337 }
3338
3339 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3340 struct iscsi_uevent *ev)
3341 {
3342 struct Scsi_Host *shost;
3343 struct iscsi_bus_flash_session *fnode_sess;
3344 uint32_t idx;
3345 int err = 0;
3346
3347 if (!transport->del_flashnode) {
3348 err = -ENOSYS;
3349 goto exit_del_fnode;
3350 }
3351
3352 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3353 if (!shost) {
3354 pr_err("%s could not find host no %u\n",
3355 __func__, ev->u.del_flashnode.host_no);
3356 err = -ENODEV;
3357 goto put_host;
3358 }
3359
3360 idx = ev->u.del_flashnode.flashnode_idx;
3361 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3362 if (!fnode_sess) {
3363 pr_err("%s could not find flashnode %u for host no %u\n",
3364 __func__, idx, ev->u.del_flashnode.host_no);
3365 err = -ENODEV;
3366 goto put_host;
3367 }
3368
3369 err = transport->del_flashnode(fnode_sess);
3370 put_device(&fnode_sess->dev);
3371
3372 put_host:
3373 scsi_host_put(shost);
3374
3375 exit_del_fnode:
3376 return err;
3377 }
3378
3379 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3380 struct iscsi_uevent *ev)
3381 {
3382 struct Scsi_Host *shost;
3383 struct iscsi_bus_flash_session *fnode_sess;
3384 struct iscsi_bus_flash_conn *fnode_conn;
3385 struct device *dev;
3386 uint32_t idx;
3387 int err = 0;
3388
3389 if (!transport->login_flashnode) {
3390 err = -ENOSYS;
3391 goto exit_login_fnode;
3392 }
3393
3394 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3395 if (!shost) {
3396 pr_err("%s could not find host no %u\n",
3397 __func__, ev->u.login_flashnode.host_no);
3398 err = -ENODEV;
3399 goto put_host;
3400 }
3401
3402 idx = ev->u.login_flashnode.flashnode_idx;
3403 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3404 if (!fnode_sess) {
3405 pr_err("%s could not find flashnode %u for host no %u\n",
3406 __func__, idx, ev->u.login_flashnode.host_no);
3407 err = -ENODEV;
3408 goto put_host;
3409 }
3410
3411 dev = iscsi_find_flashnode_conn(fnode_sess);
3412 if (!dev) {
3413 err = -ENODEV;
3414 goto put_sess;
3415 }
3416
3417 fnode_conn = iscsi_dev_to_flash_conn(dev);
3418 err = transport->login_flashnode(fnode_sess, fnode_conn);
3419 put_device(dev);
3420
3421 put_sess:
3422 put_device(&fnode_sess->dev);
3423
3424 put_host:
3425 scsi_host_put(shost);
3426
3427 exit_login_fnode:
3428 return err;
3429 }
3430
3431 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3432 struct iscsi_uevent *ev)
3433 {
3434 struct Scsi_Host *shost;
3435 struct iscsi_bus_flash_session *fnode_sess;
3436 struct iscsi_bus_flash_conn *fnode_conn;
3437 struct device *dev;
3438 uint32_t idx;
3439 int err = 0;
3440
3441 if (!transport->logout_flashnode) {
3442 err = -ENOSYS;
3443 goto exit_logout_fnode;
3444 }
3445
3446 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3447 if (!shost) {
3448 pr_err("%s could not find host no %u\n",
3449 __func__, ev->u.logout_flashnode.host_no);
3450 err = -ENODEV;
3451 goto put_host;
3452 }
3453
3454 idx = ev->u.logout_flashnode.flashnode_idx;
3455 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3456 if (!fnode_sess) {
3457 pr_err("%s could not find flashnode %u for host no %u\n",
3458 __func__, idx, ev->u.logout_flashnode.host_no);
3459 err = -ENODEV;
3460 goto put_host;
3461 }
3462
3463 dev = iscsi_find_flashnode_conn(fnode_sess);
3464 if (!dev) {
3465 err = -ENODEV;
3466 goto put_sess;
3467 }
3468
3469 fnode_conn = iscsi_dev_to_flash_conn(dev);
3470
3471 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3472 put_device(dev);
3473
3474 put_sess:
3475 put_device(&fnode_sess->dev);
3476
3477 put_host:
3478 scsi_host_put(shost);
3479
3480 exit_logout_fnode:
3481 return err;
3482 }
3483
3484 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3485 struct iscsi_uevent *ev)
3486 {
3487 struct Scsi_Host *shost;
3488 struct iscsi_cls_session *session;
3489 int err = 0;
3490
3491 if (!transport->logout_flashnode_sid) {
3492 err = -ENOSYS;
3493 goto exit_logout_sid;
3494 }
3495
3496 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3497 if (!shost) {
3498 pr_err("%s could not find host no %u\n",
3499 __func__, ev->u.logout_flashnode.host_no);
3500 err = -ENODEV;
3501 goto put_host;
3502 }
3503
3504 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3505 if (!session) {
3506 pr_err("%s could not find session id %u\n",
3507 __func__, ev->u.logout_flashnode_sid.sid);
3508 err = -EINVAL;
3509 goto put_host;
3510 }
3511
3512 err = transport->logout_flashnode_sid(session);
3513
3514 put_host:
3515 scsi_host_put(shost);
3516
3517 exit_logout_sid:
3518 return err;
3519 }
3520
3521 static int
3522 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3523 {
3524 struct iscsi_uevent *ev = nlmsg_data(nlh);
3525 struct Scsi_Host *shost = NULL;
3526 struct iscsi_internal *priv;
3527 struct sk_buff *skbhost_stats;
3528 struct nlmsghdr *nlhhost_stats;
3529 struct iscsi_uevent *evhost_stats;
3530 int host_stats_size = 0;
3531 int len, err = 0;
3532 char *buf;
3533
3534 if (!transport->get_host_stats)
3535 return -ENOSYS;
3536
3537 priv = iscsi_if_transport_lookup(transport);
3538 if (!priv)
3539 return -EINVAL;
3540
3541 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3542 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3543
3544 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3545 if (!shost) {
3546 pr_err("%s: failed. Could not find host no %u\n",
3547 __func__, ev->u.get_host_stats.host_no);
3548 return -ENODEV;
3549 }
3550
3551 do {
3552 int actual_size;
3553
3554 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3555 if (!skbhost_stats) {
3556 pr_err("cannot deliver host stats: OOM\n");
3557 err = -ENOMEM;
3558 goto exit_host_stats;
3559 }
3560
3561 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3562 (len - sizeof(*nlhhost_stats)), 0);
3563 evhost_stats = nlmsg_data(nlhhost_stats);
3564 memset(evhost_stats, 0, sizeof(*evhost_stats));
3565 evhost_stats->transport_handle = iscsi_handle(transport);
3566 evhost_stats->type = nlh->nlmsg_type;
3567 evhost_stats->u.get_host_stats.host_no =
3568 ev->u.get_host_stats.host_no;
3569 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3570 memset(buf, 0, host_stats_size);
3571
3572 err = transport->get_host_stats(shost, buf, host_stats_size);
3573 if (err) {
3574 kfree_skb(skbhost_stats);
3575 goto exit_host_stats;
3576 }
3577
3578 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3579 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3580 nlhhost_stats->nlmsg_len = actual_size;
3581
3582 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3583 GFP_KERNEL);
3584 } while (err < 0 && err != -ECONNREFUSED);
3585
3586 exit_host_stats:
3587 scsi_host_put(shost);
3588 return err;
3589 }
3590
3591
3592 static int
3593 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3594 {
3595 int err = 0;
3596 u32 portid;
3597 struct iscsi_uevent *ev = nlmsg_data(nlh);
3598 struct iscsi_transport *transport = NULL;
3599 struct iscsi_internal *priv;
3600 struct iscsi_cls_session *session;
3601 struct iscsi_cls_conn *conn;
3602 struct iscsi_endpoint *ep = NULL;
3603
3604 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3605 *group = ISCSI_NL_GRP_UIP;
3606 else
3607 *group = ISCSI_NL_GRP_ISCSID;
3608
3609 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3610 if (!priv)
3611 return -EINVAL;
3612 transport = priv->iscsi_transport;
3613
3614 if (!try_module_get(transport->owner))
3615 return -EINVAL;
3616
3617 portid = NETLINK_CB(skb).portid;
3618
3619 switch (nlh->nlmsg_type) {
3620 case ISCSI_UEVENT_CREATE_SESSION:
3621 err = iscsi_if_create_session(priv, ep, ev,
3622 portid,
3623 ev->u.c_session.initial_cmdsn,
3624 ev->u.c_session.cmds_max,
3625 ev->u.c_session.queue_depth);
3626 break;
3627 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3628 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3629 if (!ep) {
3630 err = -EINVAL;
3631 break;
3632 }
3633
3634 err = iscsi_if_create_session(priv, ep, ev,
3635 portid,
3636 ev->u.c_bound_session.initial_cmdsn,
3637 ev->u.c_bound_session.cmds_max,
3638 ev->u.c_bound_session.queue_depth);
3639 break;
3640 case ISCSI_UEVENT_DESTROY_SESSION:
3641 session = iscsi_session_lookup(ev->u.d_session.sid);
3642 if (!session)
3643 err = -EINVAL;
3644 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3645 err = -EBUSY;
3646 else
3647 transport->destroy_session(session);
3648 break;
3649 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3650 session = iscsi_session_lookup(ev->u.d_session.sid);
3651 if (!session)
3652 err = -EINVAL;
3653 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3654 err = -EBUSY;
3655 else {
3656 unsigned long flags;
3657
3658 /* Prevent this session from being found again */
3659 spin_lock_irqsave(&sesslock, flags);
3660 list_move(&session->sess_list, &sessdestroylist);
3661 spin_unlock_irqrestore(&sesslock, flags);
3662
3663 queue_work(iscsi_destroy_workq, &session->destroy_work);
3664 }
3665 break;
3666 case ISCSI_UEVENT_UNBIND_SESSION:
3667 session = iscsi_session_lookup(ev->u.d_session.sid);
3668 if (session)
3669 scsi_queue_work(iscsi_session_to_shost(session),
3670 &session->unbind_work);
3671 else
3672 err = -EINVAL;
3673 break;
3674 case ISCSI_UEVENT_CREATE_CONN:
3675 err = iscsi_if_create_conn(transport, ev);
3676 break;
3677 case ISCSI_UEVENT_DESTROY_CONN:
3678 err = iscsi_if_destroy_conn(transport, ev);
3679 break;
3680 case ISCSI_UEVENT_BIND_CONN:
3681 session = iscsi_session_lookup(ev->u.b_conn.sid);
3682 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3683
3684 if (conn && conn->ep)
3685 iscsi_if_ep_disconnect(transport, conn->ep->id);
3686
3687 if (!session || !conn) {
3688 err = -EINVAL;
3689 break;
3690 }
3691
3692 ev->r.retcode = transport->bind_conn(session, conn,
3693 ev->u.b_conn.transport_eph,
3694 ev->u.b_conn.is_leading);
3695 if (ev->r.retcode || !transport->ep_connect)
3696 break;
3697
3698 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3699 if (ep) {
3700 ep->conn = conn;
3701
3702 mutex_lock(&conn->ep_mutex);
3703 conn->ep = ep;
3704 mutex_unlock(&conn->ep_mutex);
3705 } else
3706 iscsi_cls_conn_printk(KERN_ERR, conn,
3707 "Could not set ep conn "
3708 "binding\n");
3709 break;
3710 case ISCSI_UEVENT_SET_PARAM:
3711 err = iscsi_set_param(transport, ev);
3712 break;
3713 case ISCSI_UEVENT_START_CONN:
3714 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3715 if (conn) {
3716 ev->r.retcode = transport->start_conn(conn);
3717 if (!ev->r.retcode)
3718 conn->state = ISCSI_CONN_UP;
3719 }
3720 else
3721 err = -EINVAL;
3722 break;
3723 case ISCSI_UEVENT_STOP_CONN:
3724 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3725 if (conn)
3726 transport->stop_conn(conn, ev->u.stop_conn.flag);
3727 else
3728 err = -EINVAL;
3729 break;
3730 case ISCSI_UEVENT_SEND_PDU:
3731 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3732 if (conn)
3733 ev->r.retcode = transport->send_pdu(conn,
3734 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3735 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3736 ev->u.send_pdu.data_size);
3737 else
3738 err = -EINVAL;
3739 break;
3740 case ISCSI_UEVENT_GET_STATS:
3741 err = iscsi_if_get_stats(transport, nlh);
3742 break;
3743 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3744 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3745 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3746 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3747 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3748 break;
3749 case ISCSI_UEVENT_TGT_DSCVR:
3750 err = iscsi_tgt_dscvr(transport, ev);
3751 break;
3752 case ISCSI_UEVENT_SET_HOST_PARAM:
3753 err = iscsi_set_host_param(transport, ev);
3754 break;
3755 case ISCSI_UEVENT_PATH_UPDATE:
3756 err = iscsi_set_path(transport, ev);
3757 break;
3758 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3759 err = iscsi_set_iface_params(transport, ev,
3760 nlmsg_attrlen(nlh, sizeof(*ev)));
3761 break;
3762 case ISCSI_UEVENT_PING:
3763 err = iscsi_send_ping(transport, ev);
3764 break;
3765 case ISCSI_UEVENT_GET_CHAP:
3766 err = iscsi_get_chap(transport, nlh);
3767 break;
3768 case ISCSI_UEVENT_DELETE_CHAP:
3769 err = iscsi_delete_chap(transport, ev);
3770 break;
3771 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3772 err = iscsi_set_flashnode_param(transport, ev,
3773 nlmsg_attrlen(nlh,
3774 sizeof(*ev)));
3775 break;
3776 case ISCSI_UEVENT_NEW_FLASHNODE:
3777 err = iscsi_new_flashnode(transport, ev,
3778 nlmsg_attrlen(nlh, sizeof(*ev)));
3779 break;
3780 case ISCSI_UEVENT_DEL_FLASHNODE:
3781 err = iscsi_del_flashnode(transport, ev);
3782 break;
3783 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3784 err = iscsi_login_flashnode(transport, ev);
3785 break;
3786 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3787 err = iscsi_logout_flashnode(transport, ev);
3788 break;
3789 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3790 err = iscsi_logout_flashnode_sid(transport, ev);
3791 break;
3792 case ISCSI_UEVENT_SET_CHAP:
3793 err = iscsi_set_chap(transport, ev,
3794 nlmsg_attrlen(nlh, sizeof(*ev)));
3795 break;
3796 case ISCSI_UEVENT_GET_HOST_STATS:
3797 err = iscsi_get_host_stats(transport, nlh);
3798 break;
3799 default:
3800 err = -ENOSYS;
3801 break;
3802 }
3803
3804 module_put(transport->owner);
3805 return err;
3806 }
3807
3808 /*
3809 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3810 * Malformed skbs with wrong lengths or invalid creds are not processed.
3811 */
3812 static void
3813 iscsi_if_rx(struct sk_buff *skb)
3814 {
3815 u32 portid = NETLINK_CB(skb).portid;
3816
3817 mutex_lock(&rx_queue_mutex);
3818 while (skb->len >= NLMSG_HDRLEN) {
3819 int err;
3820 uint32_t rlen;
3821 struct nlmsghdr *nlh;
3822 struct iscsi_uevent *ev;
3823 uint32_t group;
3824 int retries = ISCSI_SEND_MAX_ALLOWED;
3825
3826 nlh = nlmsg_hdr(skb);
3827 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3828 skb->len < nlh->nlmsg_len) {
3829 break;
3830 }
3831
3832 ev = nlmsg_data(nlh);
3833 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3834 if (rlen > skb->len)
3835 rlen = skb->len;
3836
3837 err = iscsi_if_recv_msg(skb, nlh, &group);
3838 if (err) {
3839 ev->type = ISCSI_KEVENT_IF_ERROR;
3840 ev->iferror = err;
3841 }
3842 do {
3843 /*
3844 * special case for GET_STATS:
3845 * on success - sending reply and stats from
3846 * inside of if_recv_msg(),
3847 * on error - fall through.
3848 */
3849 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3850 break;
3851 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3852 break;
3853 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3854 ev, sizeof(*ev));
3855 if (err == -EAGAIN && --retries < 0) {
3856 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3857 break;
3858 }
3859 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3860 skb_pull(skb, rlen);
3861 }
3862 mutex_unlock(&rx_queue_mutex);
3863 }
3864
3865 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3866 struct device_attribute dev_attr_##_prefix##_##_name = \
3867 __ATTR(_name,_mode,_show,_store)
3868
3869 /*
3870 * iSCSI connection attrs
3871 */
3872 #define iscsi_conn_attr_show(param) \
3873 static ssize_t \
3874 show_conn_param_##param(struct device *dev, \
3875 struct device_attribute *attr, char *buf) \
3876 { \
3877 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3878 struct iscsi_transport *t = conn->transport; \
3879 return t->get_conn_param(conn, param, buf); \
3880 }
3881
3882 #define iscsi_conn_attr(field, param) \
3883 iscsi_conn_attr_show(param) \
3884 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3885 NULL);
3886
3887 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3888 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3889 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3890 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3891 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3892 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3893 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3894 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3895 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3896 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3897 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3898 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3899 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3900 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3901 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3902 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3903 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3904 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3905 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3906 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3907 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3908 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3909 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3910 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3911 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3912 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3913 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3914 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3915
3916 static const char *const connection_state_names[] = {
3917 [ISCSI_CONN_UP] = "up",
3918 [ISCSI_CONN_DOWN] = "down",
3919 [ISCSI_CONN_FAILED] = "failed"
3920 };
3921
3922 static ssize_t show_conn_state(struct device *dev,
3923 struct device_attribute *attr, char *buf)
3924 {
3925 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
3926 const char *state = "unknown";
3927
3928 if (conn->state >= 0 &&
3929 conn->state < ARRAY_SIZE(connection_state_names))
3930 state = connection_state_names[conn->state];
3931
3932 return sprintf(buf, "%s\n", state);
3933 }
3934 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
3935 NULL);
3936
3937 #define iscsi_conn_ep_attr_show(param) \
3938 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3939 struct device_attribute *attr,\
3940 char *buf) \
3941 { \
3942 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3943 struct iscsi_transport *t = conn->transport; \
3944 struct iscsi_endpoint *ep; \
3945 ssize_t rc; \
3946 \
3947 /* \
3948 * Need to make sure ep_disconnect does not free the LLD's \
3949 * interconnect resources while we are trying to read them. \
3950 */ \
3951 mutex_lock(&conn->ep_mutex); \
3952 ep = conn->ep; \
3953 if (!ep && t->ep_connect) { \
3954 mutex_unlock(&conn->ep_mutex); \
3955 return -ENOTCONN; \
3956 } \
3957 \
3958 if (ep) \
3959 rc = t->get_ep_param(ep, param, buf); \
3960 else \
3961 rc = t->get_conn_param(conn, param, buf); \
3962 mutex_unlock(&conn->ep_mutex); \
3963 return rc; \
3964 }
3965
3966 #define iscsi_conn_ep_attr(field, param) \
3967 iscsi_conn_ep_attr_show(param) \
3968 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3969 show_conn_ep_param_##param, NULL);
3970
3971 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3972 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3973
3974 static struct attribute *iscsi_conn_attrs[] = {
3975 &dev_attr_conn_max_recv_dlength.attr,
3976 &dev_attr_conn_max_xmit_dlength.attr,
3977 &dev_attr_conn_header_digest.attr,
3978 &dev_attr_conn_data_digest.attr,
3979 &dev_attr_conn_ifmarker.attr,
3980 &dev_attr_conn_ofmarker.attr,
3981 &dev_attr_conn_address.attr,
3982 &dev_attr_conn_port.attr,
3983 &dev_attr_conn_exp_statsn.attr,
3984 &dev_attr_conn_persistent_address.attr,
3985 &dev_attr_conn_persistent_port.attr,
3986 &dev_attr_conn_ping_tmo.attr,
3987 &dev_attr_conn_recv_tmo.attr,
3988 &dev_attr_conn_local_port.attr,
3989 &dev_attr_conn_statsn.attr,
3990 &dev_attr_conn_keepalive_tmo.attr,
3991 &dev_attr_conn_max_segment_size.attr,
3992 &dev_attr_conn_tcp_timestamp_stat.attr,
3993 &dev_attr_conn_tcp_wsf_disable.attr,
3994 &dev_attr_conn_tcp_nagle_disable.attr,
3995 &dev_attr_conn_tcp_timer_scale.attr,
3996 &dev_attr_conn_tcp_timestamp_enable.attr,
3997 &dev_attr_conn_fragment_disable.attr,
3998 &dev_attr_conn_ipv4_tos.attr,
3999 &dev_attr_conn_ipv6_traffic_class.attr,
4000 &dev_attr_conn_ipv6_flow_label.attr,
4001 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4002 &dev_attr_conn_tcp_xmit_wsf.attr,
4003 &dev_attr_conn_tcp_recv_wsf.attr,
4004 &dev_attr_conn_local_ipaddr.attr,
4005 &dev_attr_conn_state.attr,
4006 NULL,
4007 };
4008
4009 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4010 struct attribute *attr, int i)
4011 {
4012 struct device *cdev = container_of(kobj, struct device, kobj);
4013 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4014 struct iscsi_transport *t = conn->transport;
4015 int param;
4016
4017 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4018 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4019 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4020 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4021 else if (attr == &dev_attr_conn_header_digest.attr)
4022 param = ISCSI_PARAM_HDRDGST_EN;
4023 else if (attr == &dev_attr_conn_data_digest.attr)
4024 param = ISCSI_PARAM_DATADGST_EN;
4025 else if (attr == &dev_attr_conn_ifmarker.attr)
4026 param = ISCSI_PARAM_IFMARKER_EN;
4027 else if (attr == &dev_attr_conn_ofmarker.attr)
4028 param = ISCSI_PARAM_OFMARKER_EN;
4029 else if (attr == &dev_attr_conn_address.attr)
4030 param = ISCSI_PARAM_CONN_ADDRESS;
4031 else if (attr == &dev_attr_conn_port.attr)
4032 param = ISCSI_PARAM_CONN_PORT;
4033 else if (attr == &dev_attr_conn_exp_statsn.attr)
4034 param = ISCSI_PARAM_EXP_STATSN;
4035 else if (attr == &dev_attr_conn_persistent_address.attr)
4036 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4037 else if (attr == &dev_attr_conn_persistent_port.attr)
4038 param = ISCSI_PARAM_PERSISTENT_PORT;
4039 else if (attr == &dev_attr_conn_ping_tmo.attr)
4040 param = ISCSI_PARAM_PING_TMO;
4041 else if (attr == &dev_attr_conn_recv_tmo.attr)
4042 param = ISCSI_PARAM_RECV_TMO;
4043 else if (attr == &dev_attr_conn_local_port.attr)
4044 param = ISCSI_PARAM_LOCAL_PORT;
4045 else if (attr == &dev_attr_conn_statsn.attr)
4046 param = ISCSI_PARAM_STATSN;
4047 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4048 param = ISCSI_PARAM_KEEPALIVE_TMO;
4049 else if (attr == &dev_attr_conn_max_segment_size.attr)
4050 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4051 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4052 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4053 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4054 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4055 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4056 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4057 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4058 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4059 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4060 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4061 else if (attr == &dev_attr_conn_fragment_disable.attr)
4062 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4063 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4064 param = ISCSI_PARAM_IPV4_TOS;
4065 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4066 param = ISCSI_PARAM_IPV6_TC;
4067 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4068 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4069 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4070 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4071 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4072 param = ISCSI_PARAM_TCP_XMIT_WSF;
4073 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4074 param = ISCSI_PARAM_TCP_RECV_WSF;
4075 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4076 param = ISCSI_PARAM_LOCAL_IPADDR;
4077 else if (attr == &dev_attr_conn_state.attr)
4078 return S_IRUGO;
4079 else {
4080 WARN_ONCE(1, "Invalid conn attr");
4081 return 0;
4082 }
4083
4084 return t->attr_is_visible(ISCSI_PARAM, param);
4085 }
4086
4087 static struct attribute_group iscsi_conn_group = {
4088 .attrs = iscsi_conn_attrs,
4089 .is_visible = iscsi_conn_attr_is_visible,
4090 };
4091
4092 /*
4093 * iSCSI session attrs
4094 */
4095 #define iscsi_session_attr_show(param, perm) \
4096 static ssize_t \
4097 show_session_param_##param(struct device *dev, \
4098 struct device_attribute *attr, char *buf) \
4099 { \
4100 struct iscsi_cls_session *session = \
4101 iscsi_dev_to_session(dev->parent); \
4102 struct iscsi_transport *t = session->transport; \
4103 \
4104 if (perm && !capable(CAP_SYS_ADMIN)) \
4105 return -EACCES; \
4106 return t->get_session_param(session, param, buf); \
4107 }
4108
4109 #define iscsi_session_attr(field, param, perm) \
4110 iscsi_session_attr_show(param, perm) \
4111 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4112 NULL);
4113 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4114 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4115 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4116 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4117 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4118 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4119 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4120 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4121 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4122 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4123 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4124 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4125 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4126 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4127 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4128 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4129 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4130 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4131 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4132 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4133 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4134 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4135 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4136 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4137 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4138 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4139 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4140 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4141 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4142 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4143 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4144 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4145 iscsi_session_attr(discovery_auth_optional,
4146 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4147 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4148 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4149 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4150 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4151 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4152 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4153 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4154
4155 static ssize_t
4156 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4157 char *buf)
4158 {
4159 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4160 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4161 }
4162 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4163 NULL);
4164 static ssize_t
4165 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4166 char *buf)
4167 {
4168 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4169 return sprintf(buf, "%d\n", session->creator);
4170 }
4171 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4172 NULL);
4173 static ssize_t
4174 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4175 char *buf)
4176 {
4177 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4178 return sprintf(buf, "%d\n", session->target_id);
4179 }
4180 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4181 show_priv_session_target_id, NULL);
4182
4183 #define iscsi_priv_session_attr_show(field, format) \
4184 static ssize_t \
4185 show_priv_session_##field(struct device *dev, \
4186 struct device_attribute *attr, char *buf) \
4187 { \
4188 struct iscsi_cls_session *session = \
4189 iscsi_dev_to_session(dev->parent); \
4190 if (session->field == -1) \
4191 return sprintf(buf, "off\n"); \
4192 return sprintf(buf, format"\n", session->field); \
4193 }
4194
4195 #define iscsi_priv_session_attr_store(field) \
4196 static ssize_t \
4197 store_priv_session_##field(struct device *dev, \
4198 struct device_attribute *attr, \
4199 const char *buf, size_t count) \
4200 { \
4201 int val; \
4202 char *cp; \
4203 struct iscsi_cls_session *session = \
4204 iscsi_dev_to_session(dev->parent); \
4205 if ((session->state == ISCSI_SESSION_FREE) || \
4206 (session->state == ISCSI_SESSION_FAILED)) \
4207 return -EBUSY; \
4208 if (strncmp(buf, "off", 3) == 0) { \
4209 session->field = -1; \
4210 session->field##_sysfs_override = true; \
4211 } else { \
4212 val = simple_strtoul(buf, &cp, 0); \
4213 if (*cp != '\0' && *cp != '\n') \
4214 return -EINVAL; \
4215 session->field = val; \
4216 session->field##_sysfs_override = true; \
4217 } \
4218 return count; \
4219 }
4220
4221 #define iscsi_priv_session_rw_attr(field, format) \
4222 iscsi_priv_session_attr_show(field, format) \
4223 iscsi_priv_session_attr_store(field) \
4224 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4225 show_priv_session_##field, \
4226 store_priv_session_##field)
4227
4228 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4229
4230 static struct attribute *iscsi_session_attrs[] = {
4231 &dev_attr_sess_initial_r2t.attr,
4232 &dev_attr_sess_max_outstanding_r2t.attr,
4233 &dev_attr_sess_immediate_data.attr,
4234 &dev_attr_sess_first_burst_len.attr,
4235 &dev_attr_sess_max_burst_len.attr,
4236 &dev_attr_sess_data_pdu_in_order.attr,
4237 &dev_attr_sess_data_seq_in_order.attr,
4238 &dev_attr_sess_erl.attr,
4239 &dev_attr_sess_targetname.attr,
4240 &dev_attr_sess_tpgt.attr,
4241 &dev_attr_sess_password.attr,
4242 &dev_attr_sess_password_in.attr,
4243 &dev_attr_sess_username.attr,
4244 &dev_attr_sess_username_in.attr,
4245 &dev_attr_sess_fast_abort.attr,
4246 &dev_attr_sess_abort_tmo.attr,
4247 &dev_attr_sess_lu_reset_tmo.attr,
4248 &dev_attr_sess_tgt_reset_tmo.attr,
4249 &dev_attr_sess_ifacename.attr,
4250 &dev_attr_sess_initiatorname.attr,
4251 &dev_attr_sess_targetalias.attr,
4252 &dev_attr_sess_boot_root.attr,
4253 &dev_attr_sess_boot_nic.attr,
4254 &dev_attr_sess_boot_target.attr,
4255 &dev_attr_priv_sess_recovery_tmo.attr,
4256 &dev_attr_priv_sess_state.attr,
4257 &dev_attr_priv_sess_creator.attr,
4258 &dev_attr_sess_chap_out_idx.attr,
4259 &dev_attr_sess_chap_in_idx.attr,
4260 &dev_attr_priv_sess_target_id.attr,
4261 &dev_attr_sess_auto_snd_tgt_disable.attr,
4262 &dev_attr_sess_discovery_session.attr,
4263 &dev_attr_sess_portal_type.attr,
4264 &dev_attr_sess_chap_auth.attr,
4265 &dev_attr_sess_discovery_logout.attr,
4266 &dev_attr_sess_bidi_chap.attr,
4267 &dev_attr_sess_discovery_auth_optional.attr,
4268 &dev_attr_sess_def_time2wait.attr,
4269 &dev_attr_sess_def_time2retain.attr,
4270 &dev_attr_sess_isid.attr,
4271 &dev_attr_sess_tsid.attr,
4272 &dev_attr_sess_def_taskmgmt_tmo.attr,
4273 &dev_attr_sess_discovery_parent_idx.attr,
4274 &dev_attr_sess_discovery_parent_type.attr,
4275 NULL,
4276 };
4277
4278 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4279 struct attribute *attr, int i)
4280 {
4281 struct device *cdev = container_of(kobj, struct device, kobj);
4282 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4283 struct iscsi_transport *t = session->transport;
4284 int param;
4285
4286 if (attr == &dev_attr_sess_initial_r2t.attr)
4287 param = ISCSI_PARAM_INITIAL_R2T_EN;
4288 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4289 param = ISCSI_PARAM_MAX_R2T;
4290 else if (attr == &dev_attr_sess_immediate_data.attr)
4291 param = ISCSI_PARAM_IMM_DATA_EN;
4292 else if (attr == &dev_attr_sess_first_burst_len.attr)
4293 param = ISCSI_PARAM_FIRST_BURST;
4294 else if (attr == &dev_attr_sess_max_burst_len.attr)
4295 param = ISCSI_PARAM_MAX_BURST;
4296 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4297 param = ISCSI_PARAM_PDU_INORDER_EN;
4298 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4299 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4300 else if (attr == &dev_attr_sess_erl.attr)
4301 param = ISCSI_PARAM_ERL;
4302 else if (attr == &dev_attr_sess_targetname.attr)
4303 param = ISCSI_PARAM_TARGET_NAME;
4304 else if (attr == &dev_attr_sess_tpgt.attr)
4305 param = ISCSI_PARAM_TPGT;
4306 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4307 param = ISCSI_PARAM_CHAP_IN_IDX;
4308 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4309 param = ISCSI_PARAM_CHAP_OUT_IDX;
4310 else if (attr == &dev_attr_sess_password.attr)
4311 param = ISCSI_PARAM_USERNAME;
4312 else if (attr == &dev_attr_sess_password_in.attr)
4313 param = ISCSI_PARAM_USERNAME_IN;
4314 else if (attr == &dev_attr_sess_username.attr)
4315 param = ISCSI_PARAM_PASSWORD;
4316 else if (attr == &dev_attr_sess_username_in.attr)
4317 param = ISCSI_PARAM_PASSWORD_IN;
4318 else if (attr == &dev_attr_sess_fast_abort.attr)
4319 param = ISCSI_PARAM_FAST_ABORT;
4320 else if (attr == &dev_attr_sess_abort_tmo.attr)
4321 param = ISCSI_PARAM_ABORT_TMO;
4322 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4323 param = ISCSI_PARAM_LU_RESET_TMO;
4324 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4325 param = ISCSI_PARAM_TGT_RESET_TMO;
4326 else if (attr == &dev_attr_sess_ifacename.attr)
4327 param = ISCSI_PARAM_IFACE_NAME;
4328 else if (attr == &dev_attr_sess_initiatorname.attr)
4329 param = ISCSI_PARAM_INITIATOR_NAME;
4330 else if (attr == &dev_attr_sess_targetalias.attr)
4331 param = ISCSI_PARAM_TARGET_ALIAS;
4332 else if (attr == &dev_attr_sess_boot_root.attr)
4333 param = ISCSI_PARAM_BOOT_ROOT;
4334 else if (attr == &dev_attr_sess_boot_nic.attr)
4335 param = ISCSI_PARAM_BOOT_NIC;
4336 else if (attr == &dev_attr_sess_boot_target.attr)
4337 param = ISCSI_PARAM_BOOT_TARGET;
4338 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4339 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4340 else if (attr == &dev_attr_sess_discovery_session.attr)
4341 param = ISCSI_PARAM_DISCOVERY_SESS;
4342 else if (attr == &dev_attr_sess_portal_type.attr)
4343 param = ISCSI_PARAM_PORTAL_TYPE;
4344 else if (attr == &dev_attr_sess_chap_auth.attr)
4345 param = ISCSI_PARAM_CHAP_AUTH_EN;
4346 else if (attr == &dev_attr_sess_discovery_logout.attr)
4347 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4348 else if (attr == &dev_attr_sess_bidi_chap.attr)
4349 param = ISCSI_PARAM_BIDI_CHAP_EN;
4350 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4351 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4352 else if (attr == &dev_attr_sess_def_time2wait.attr)
4353 param = ISCSI_PARAM_DEF_TIME2WAIT;
4354 else if (attr == &dev_attr_sess_def_time2retain.attr)
4355 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4356 else if (attr == &dev_attr_sess_isid.attr)
4357 param = ISCSI_PARAM_ISID;
4358 else if (attr == &dev_attr_sess_tsid.attr)
4359 param = ISCSI_PARAM_TSID;
4360 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4361 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4362 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4363 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4364 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4365 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4366 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4367 return S_IRUGO | S_IWUSR;
4368 else if (attr == &dev_attr_priv_sess_state.attr)
4369 return S_IRUGO;
4370 else if (attr == &dev_attr_priv_sess_creator.attr)
4371 return S_IRUGO;
4372 else if (attr == &dev_attr_priv_sess_target_id.attr)
4373 return S_IRUGO;
4374 else {
4375 WARN_ONCE(1, "Invalid session attr");
4376 return 0;
4377 }
4378
4379 return t->attr_is_visible(ISCSI_PARAM, param);
4380 }
4381
4382 static struct attribute_group iscsi_session_group = {
4383 .attrs = iscsi_session_attrs,
4384 .is_visible = iscsi_session_attr_is_visible,
4385 };
4386
4387 /*
4388 * iSCSI host attrs
4389 */
4390 #define iscsi_host_attr_show(param) \
4391 static ssize_t \
4392 show_host_param_##param(struct device *dev, \
4393 struct device_attribute *attr, char *buf) \
4394 { \
4395 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4396 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4397 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4398 }
4399
4400 #define iscsi_host_attr(field, param) \
4401 iscsi_host_attr_show(param) \
4402 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4403 NULL);
4404
4405 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4406 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4407 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4408 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4409 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4410 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4411
4412 static struct attribute *iscsi_host_attrs[] = {
4413 &dev_attr_host_netdev.attr,
4414 &dev_attr_host_hwaddress.attr,
4415 &dev_attr_host_ipaddress.attr,
4416 &dev_attr_host_initiatorname.attr,
4417 &dev_attr_host_port_state.attr,
4418 &dev_attr_host_port_speed.attr,
4419 NULL,
4420 };
4421
4422 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4423 struct attribute *attr, int i)
4424 {
4425 struct device *cdev = container_of(kobj, struct device, kobj);
4426 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4427 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4428 int param;
4429
4430 if (attr == &dev_attr_host_netdev.attr)
4431 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4432 else if (attr == &dev_attr_host_hwaddress.attr)
4433 param = ISCSI_HOST_PARAM_HWADDRESS;
4434 else if (attr == &dev_attr_host_ipaddress.attr)
4435 param = ISCSI_HOST_PARAM_IPADDRESS;
4436 else if (attr == &dev_attr_host_initiatorname.attr)
4437 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4438 else if (attr == &dev_attr_host_port_state.attr)
4439 param = ISCSI_HOST_PARAM_PORT_STATE;
4440 else if (attr == &dev_attr_host_port_speed.attr)
4441 param = ISCSI_HOST_PARAM_PORT_SPEED;
4442 else {
4443 WARN_ONCE(1, "Invalid host attr");
4444 return 0;
4445 }
4446
4447 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4448 }
4449
4450 static struct attribute_group iscsi_host_group = {
4451 .attrs = iscsi_host_attrs,
4452 .is_visible = iscsi_host_attr_is_visible,
4453 };
4454
4455 /* convert iscsi_port_speed values to ascii string name */
4456 static const struct {
4457 enum iscsi_port_speed value;
4458 char *name;
4459 } iscsi_port_speed_names[] = {
4460 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4461 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4462 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4463 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4464 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4465 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4466 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4467 };
4468
4469 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4470 {
4471 int i;
4472 char *speed = "Unknown!";
4473 struct iscsi_cls_host *ihost = shost->shost_data;
4474 uint32_t port_speed = ihost->port_speed;
4475
4476 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4477 if (iscsi_port_speed_names[i].value & port_speed) {
4478 speed = iscsi_port_speed_names[i].name;
4479 break;
4480 }
4481 }
4482 return speed;
4483 }
4484 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4485
4486 /* convert iscsi_port_state values to ascii string name */
4487 static const struct {
4488 enum iscsi_port_state value;
4489 char *name;
4490 } iscsi_port_state_names[] = {
4491 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4492 {ISCSI_PORT_STATE_UP, "LINK UP" },
4493 };
4494
4495 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4496 {
4497 int i;
4498 char *state = "Unknown!";
4499 struct iscsi_cls_host *ihost = shost->shost_data;
4500 uint32_t port_state = ihost->port_state;
4501
4502 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4503 if (iscsi_port_state_names[i].value & port_state) {
4504 state = iscsi_port_state_names[i].name;
4505 break;
4506 }
4507 }
4508 return state;
4509 }
4510 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4511
4512 static int iscsi_session_match(struct attribute_container *cont,
4513 struct device *dev)
4514 {
4515 struct iscsi_cls_session *session;
4516 struct Scsi_Host *shost;
4517 struct iscsi_internal *priv;
4518
4519 if (!iscsi_is_session_dev(dev))
4520 return 0;
4521
4522 session = iscsi_dev_to_session(dev);
4523 shost = iscsi_session_to_shost(session);
4524 if (!shost->transportt)
4525 return 0;
4526
4527 priv = to_iscsi_internal(shost->transportt);
4528 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4529 return 0;
4530
4531 return &priv->session_cont.ac == cont;
4532 }
4533
4534 static int iscsi_conn_match(struct attribute_container *cont,
4535 struct device *dev)
4536 {
4537 struct iscsi_cls_session *session;
4538 struct iscsi_cls_conn *conn;
4539 struct Scsi_Host *shost;
4540 struct iscsi_internal *priv;
4541
4542 if (!iscsi_is_conn_dev(dev))
4543 return 0;
4544
4545 conn = iscsi_dev_to_conn(dev);
4546 session = iscsi_dev_to_session(conn->dev.parent);
4547 shost = iscsi_session_to_shost(session);
4548
4549 if (!shost->transportt)
4550 return 0;
4551
4552 priv = to_iscsi_internal(shost->transportt);
4553 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4554 return 0;
4555
4556 return &priv->conn_cont.ac == cont;
4557 }
4558
4559 static int iscsi_host_match(struct attribute_container *cont,
4560 struct device *dev)
4561 {
4562 struct Scsi_Host *shost;
4563 struct iscsi_internal *priv;
4564
4565 if (!scsi_is_host_device(dev))
4566 return 0;
4567
4568 shost = dev_to_shost(dev);
4569 if (!shost->transportt ||
4570 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4571 return 0;
4572
4573 priv = to_iscsi_internal(shost->transportt);
4574 return &priv->t.host_attrs.ac == cont;
4575 }
4576
4577 struct scsi_transport_template *
4578 iscsi_register_transport(struct iscsi_transport *tt)
4579 {
4580 struct iscsi_internal *priv;
4581 unsigned long flags;
4582 int err;
4583
4584 BUG_ON(!tt);
4585
4586 priv = iscsi_if_transport_lookup(tt);
4587 if (priv)
4588 return NULL;
4589
4590 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4591 if (!priv)
4592 return NULL;
4593 INIT_LIST_HEAD(&priv->list);
4594 priv->iscsi_transport = tt;
4595 priv->t.user_scan = iscsi_user_scan;
4596 priv->t.create_work_queue = 1;
4597
4598 priv->dev.class = &iscsi_transport_class;
4599 dev_set_name(&priv->dev, "%s", tt->name);
4600 err = device_register(&priv->dev);
4601 if (err)
4602 goto free_priv;
4603
4604 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4605 if (err)
4606 goto unregister_dev;
4607
4608 /* host parameters */
4609 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4610 priv->t.host_attrs.ac.match = iscsi_host_match;
4611 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4612 priv->t.host_size = sizeof(struct iscsi_cls_host);
4613 transport_container_register(&priv->t.host_attrs);
4614
4615 /* connection parameters */
4616 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4617 priv->conn_cont.ac.match = iscsi_conn_match;
4618 priv->conn_cont.ac.grp = &iscsi_conn_group;
4619 transport_container_register(&priv->conn_cont);
4620
4621 /* session parameters */
4622 priv->session_cont.ac.class = &iscsi_session_class.class;
4623 priv->session_cont.ac.match = iscsi_session_match;
4624 priv->session_cont.ac.grp = &iscsi_session_group;
4625 transport_container_register(&priv->session_cont);
4626
4627 spin_lock_irqsave(&iscsi_transport_lock, flags);
4628 list_add(&priv->list, &iscsi_transports);
4629 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4630
4631 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4632 return &priv->t;
4633
4634 unregister_dev:
4635 device_unregister(&priv->dev);
4636 return NULL;
4637 free_priv:
4638 kfree(priv);
4639 return NULL;
4640 }
4641 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4642
4643 int iscsi_unregister_transport(struct iscsi_transport *tt)
4644 {
4645 struct iscsi_internal *priv;
4646 unsigned long flags;
4647
4648 BUG_ON(!tt);
4649
4650 mutex_lock(&rx_queue_mutex);
4651
4652 priv = iscsi_if_transport_lookup(tt);
4653 BUG_ON (!priv);
4654
4655 spin_lock_irqsave(&iscsi_transport_lock, flags);
4656 list_del(&priv->list);
4657 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4658
4659 transport_container_unregister(&priv->conn_cont);
4660 transport_container_unregister(&priv->session_cont);
4661 transport_container_unregister(&priv->t.host_attrs);
4662
4663 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4664 device_unregister(&priv->dev);
4665 mutex_unlock(&rx_queue_mutex);
4666
4667 return 0;
4668 }
4669 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4670
4671 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4672 struct device *dev, const char *fmt, ...)
4673 {
4674 struct va_format vaf;
4675 va_list args;
4676
4677 va_start(args, fmt);
4678 vaf.fmt = fmt;
4679 vaf.va = &args;
4680 trace(dev, &vaf);
4681 va_end(args);
4682 }
4683 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4684
4685 static __init int iscsi_transport_init(void)
4686 {
4687 int err;
4688 struct netlink_kernel_cfg cfg = {
4689 .groups = 1,
4690 .input = iscsi_if_rx,
4691 };
4692 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4693 ISCSI_TRANSPORT_VERSION);
4694
4695 atomic_set(&iscsi_session_nr, 0);
4696
4697 err = class_register(&iscsi_transport_class);
4698 if (err)
4699 return err;
4700
4701 err = class_register(&iscsi_endpoint_class);
4702 if (err)
4703 goto unregister_transport_class;
4704
4705 err = class_register(&iscsi_iface_class);
4706 if (err)
4707 goto unregister_endpoint_class;
4708
4709 err = transport_class_register(&iscsi_host_class);
4710 if (err)
4711 goto unregister_iface_class;
4712
4713 err = transport_class_register(&iscsi_connection_class);
4714 if (err)
4715 goto unregister_host_class;
4716
4717 err = transport_class_register(&iscsi_session_class);
4718 if (err)
4719 goto unregister_conn_class;
4720
4721 err = bus_register(&iscsi_flashnode_bus);
4722 if (err)
4723 goto unregister_session_class;
4724
4725 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4726 if (!nls) {
4727 err = -ENOBUFS;
4728 goto unregister_flashnode_bus;
4729 }
4730
4731 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4732 if (!iscsi_eh_timer_workq) {
4733 err = -ENOMEM;
4734 goto release_nls;
4735 }
4736
4737 iscsi_destroy_workq = create_singlethread_workqueue("iscsi_destroy");
4738 if (!iscsi_destroy_workq) {
4739 err = -ENOMEM;
4740 goto destroy_wq;
4741 }
4742
4743 return 0;
4744
4745 destroy_wq:
4746 destroy_workqueue(iscsi_eh_timer_workq);
4747 release_nls:
4748 netlink_kernel_release(nls);
4749 unregister_flashnode_bus:
4750 bus_unregister(&iscsi_flashnode_bus);
4751 unregister_session_class:
4752 transport_class_unregister(&iscsi_session_class);
4753 unregister_conn_class:
4754 transport_class_unregister(&iscsi_connection_class);
4755 unregister_host_class:
4756 transport_class_unregister(&iscsi_host_class);
4757 unregister_iface_class:
4758 class_unregister(&iscsi_iface_class);
4759 unregister_endpoint_class:
4760 class_unregister(&iscsi_endpoint_class);
4761 unregister_transport_class:
4762 class_unregister(&iscsi_transport_class);
4763 return err;
4764 }
4765
4766 static void __exit iscsi_transport_exit(void)
4767 {
4768 destroy_workqueue(iscsi_destroy_workq);
4769 destroy_workqueue(iscsi_eh_timer_workq);
4770 netlink_kernel_release(nls);
4771 bus_unregister(&iscsi_flashnode_bus);
4772 transport_class_unregister(&iscsi_connection_class);
4773 transport_class_unregister(&iscsi_session_class);
4774 transport_class_unregister(&iscsi_host_class);
4775 class_unregister(&iscsi_endpoint_class);
4776 class_unregister(&iscsi_iface_class);
4777 class_unregister(&iscsi_transport_class);
4778 }
4779
4780 module_init(iscsi_transport_init);
4781 module_exit(iscsi_transport_exit);
4782
4783 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4784 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4785 "Alex Aizman <itn780@yahoo.com>");
4786 MODULE_DESCRIPTION("iSCSI Transport Interface");
4787 MODULE_LICENSE("GPL");
4788 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4789 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux with added FPC-III support