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Revert "tty: hvc: Fix data abort due to race in hvc_open"
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_iscsi.c
blobea6d498fa9232c8f31eb6491f35cbefcf506e412
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * iSCSI transport class definitions
4 *
5 * Copyright (C) IBM Corporation, 2004
6 * Copyright (C) Mike Christie, 2004 - 2005
7 * Copyright (C) Dmitry Yusupov, 2004 - 2005
8 * Copyright (C) Alex Aizman, 2004 - 2005
9 */
10 #include <linux/module.h>
11 #include <linux/mutex.h>
12 #include <linux/slab.h>
13 #include <linux/bsg-lib.h>
14 #include <linux/idr.h>
15 #include <net/tcp.h>
16 #include <scsi/scsi.h>
17 #include <scsi/scsi_host.h>
18 #include <scsi/scsi_device.h>
19 #include <scsi/scsi_transport.h>
20 #include <scsi/scsi_transport_iscsi.h>
21 #include <scsi/iscsi_if.h>
22 #include <scsi/scsi_cmnd.h>
23 #include <scsi/scsi_bsg_iscsi.h>
24
25 #define ISCSI_TRANSPORT_VERSION "2.0-870"
26
27 #define ISCSI_SEND_MAX_ALLOWED 10
28
29 #define CREATE_TRACE_POINTS
30 #include <trace/events/iscsi.h>
31
32 /*
33 * Export tracepoint symbols to be used by other modules.
34 */
35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);
36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);
37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);
38 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);
39 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);
40
41 static int dbg_session;
42 module_param_named(debug_session, dbg_session, int,
43 S_IRUGO | S_IWUSR);
44 MODULE_PARM_DESC(debug_session,
45 "Turn on debugging for sessions in scsi_transport_iscsi "
46 "module. Set to 1 to turn on, and zero to turn off. Default "
47 "is off.");
48
49 static int dbg_conn;
50 module_param_named(debug_conn, dbg_conn, int,
51 S_IRUGO | S_IWUSR);
52 MODULE_PARM_DESC(debug_conn,
53 "Turn on debugging for connections in scsi_transport_iscsi "
54 "module. Set to 1 to turn on, and zero to turn off. Default "
55 "is off.");
56
57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
58 do { \
59 if (dbg_session) \
60 iscsi_cls_session_printk(KERN_INFO, _session, \
61 "%s: " dbg_fmt, \
62 __func__, ##arg); \
63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \
64 &(_session)->dev, \
65 "%s " dbg_fmt, __func__, ##arg); \
66 } while (0);
67
68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
69 do { \
70 if (dbg_conn) \
71 iscsi_cls_conn_printk(KERN_INFO, _conn, \
72 "%s: " dbg_fmt, \
73 __func__, ##arg); \
74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \
75 &(_conn)->dev, \
76 "%s " dbg_fmt, __func__, ##arg); \
77 } while (0);
78
79 struct iscsi_internal {
80 struct scsi_transport_template t;
81 struct iscsi_transport *iscsi_transport;
82 struct list_head list;
83 struct device dev;
84
85 struct transport_container conn_cont;
86 struct transport_container session_cont;
87 };
88
89 /* Worker to perform connection failure on unresponsive connections
90 * completely in kernel space.
91 */
92 static void stop_conn_work_fn(struct work_struct *work);
93 static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);
94
95 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
96 static struct workqueue_struct *iscsi_eh_timer_workq;
97
98 static struct workqueue_struct *iscsi_destroy_workq;
99
100 static DEFINE_IDA(iscsi_sess_ida);
101 /*
102 * list of registered transports and lock that must
103 * be held while accessing list. The iscsi_transport_lock must
104 * be acquired after the rx_queue_mutex.
105 */
106 static LIST_HEAD(iscsi_transports);
107 static DEFINE_SPINLOCK(iscsi_transport_lock);
108
109 #define to_iscsi_internal(tmpl) \
110 container_of(tmpl, struct iscsi_internal, t)
111
112 #define dev_to_iscsi_internal(_dev) \
113 container_of(_dev, struct iscsi_internal, dev)
114
115 static void iscsi_transport_release(struct device *dev)
116 {
117 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
118 kfree(priv);
119 }
120
121 /*
122 * iscsi_transport_class represents the iscsi_transports that are
123 * registered.
124 */
125 static struct class iscsi_transport_class = {
126 .name = "iscsi_transport",
127 .dev_release = iscsi_transport_release,
128 };
129
130 static ssize_t
131 show_transport_handle(struct device *dev, struct device_attribute *attr,
132 char *buf)
133 {
134 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
135 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
136 }
137 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
138
139 #define show_transport_attr(name, format) \
140 static ssize_t \
141 show_transport_##name(struct device *dev, \
142 struct device_attribute *attr,char *buf) \
143 { \
144 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
145 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
146 } \
147 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
148
149 show_transport_attr(caps, "0x%x");
150
151 static struct attribute *iscsi_transport_attrs[] = {
152 &dev_attr_handle.attr,
153 &dev_attr_caps.attr,
154 NULL,
155 };
156
157 static struct attribute_group iscsi_transport_group = {
158 .attrs = iscsi_transport_attrs,
159 };
160
161 /*
162 * iSCSI endpoint attrs
163 */
164 #define iscsi_dev_to_endpoint(_dev) \
165 container_of(_dev, struct iscsi_endpoint, dev)
166
167 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
168 struct device_attribute dev_attr_##_prefix##_##_name = \
169 __ATTR(_name,_mode,_show,_store)
170
171 static void iscsi_endpoint_release(struct device *dev)
172 {
173 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
174 kfree(ep);
175 }
176
177 static struct class iscsi_endpoint_class = {
178 .name = "iscsi_endpoint",
179 .dev_release = iscsi_endpoint_release,
180 };
181
182 static ssize_t
183 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
184 {
185 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
186 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
187 }
188 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
189
190 static struct attribute *iscsi_endpoint_attrs[] = {
191 &dev_attr_ep_handle.attr,
192 NULL,
193 };
194
195 static struct attribute_group iscsi_endpoint_group = {
196 .attrs = iscsi_endpoint_attrs,
197 };
198
199 #define ISCSI_MAX_EPID -1
200
201 static int iscsi_match_epid(struct device *dev, const void *data)
202 {
203 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
204 const uint64_t *epid = data;
205
206 return *epid == ep->id;
207 }
208
209 struct iscsi_endpoint *
210 iscsi_create_endpoint(int dd_size)
211 {
212 struct device *dev;
213 struct iscsi_endpoint *ep;
214 uint64_t id;
215 int err;
216
217 for (id = 1; id < ISCSI_MAX_EPID; id++) {
218 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
219 iscsi_match_epid);
220 if (!dev)
221 break;
222 else
223 put_device(dev);
224 }
225 if (id == ISCSI_MAX_EPID) {
226 printk(KERN_ERR "Too many connections. Max supported %u\n",
227 ISCSI_MAX_EPID - 1);
228 return NULL;
229 }
230
231 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
232 if (!ep)
233 return NULL;
234
235 ep->id = id;
236 ep->dev.class = &iscsi_endpoint_class;
237 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
238 err = device_register(&ep->dev);
239 if (err)
240 goto free_ep;
241
242 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
243 if (err)
244 goto unregister_dev;
245
246 if (dd_size)
247 ep->dd_data = &ep[1];
248 return ep;
249
250 unregister_dev:
251 device_unregister(&ep->dev);
252 return NULL;
253
254 free_ep:
255 kfree(ep);
256 return NULL;
257 }
258 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
259
260 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
261 {
262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
263 device_unregister(&ep->dev);
264 }
265 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
266
267 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
268 {
269 struct iscsi_endpoint *ep;
270 struct device *dev;
271
272 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
273 iscsi_match_epid);
274 if (!dev)
275 return NULL;
276
277 ep = iscsi_dev_to_endpoint(dev);
278 /*
279 * we can drop this now because the interface will prevent
280 * removals and lookups from racing.
281 */
282 put_device(dev);
283 return ep;
284 }
285 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
286
287 /*
288 * Interface to display network param to sysfs
289 */
290
291 static void iscsi_iface_release(struct device *dev)
292 {
293 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
294 struct device *parent = iface->dev.parent;
295
296 kfree(iface);
297 put_device(parent);
298 }
299
300
301 static struct class iscsi_iface_class = {
302 .name = "iscsi_iface",
303 .dev_release = iscsi_iface_release,
304 };
305
306 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
307 struct device_attribute dev_attr_##_prefix##_##_name = \
308 __ATTR(_name, _mode, _show, _store)
309
310 /* iface attrs show */
311 #define iscsi_iface_attr_show(type, name, param_type, param) \
312 static ssize_t \
313 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
314 char *buf) \
315 { \
316 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
317 struct iscsi_transport *t = iface->transport; \
318 return t->get_iface_param(iface, param_type, param, buf); \
319 } \
320
321 #define iscsi_iface_net_attr(type, name, param) \
322 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
323 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
324
325 #define iscsi_iface_attr(type, name, param) \
326 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
327 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
328
329 /* generic read only ipv4 attribute */
330 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
331 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
332 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
333 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
334 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
335 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
336 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
337 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
338 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
339 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
340 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
341 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
342 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
343 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
344 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
345 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
346 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
347 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
348 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
349 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
350 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
351 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
352 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
353 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
354 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
355 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
356 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
357 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
358 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
359
360 /* generic read only ipv6 attribute */
361 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
362 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
363 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
364 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
365 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
366 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
367 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
368 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
369 iscsi_iface_net_attr(ipv6_iface, link_local_state,
370 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
371 iscsi_iface_net_attr(ipv6_iface, router_state,
372 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
373 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
374 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
375 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
376 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
377 iscsi_iface_net_attr(ipv6_iface, traffic_class,
378 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
379 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
380 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
381 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
382 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
383 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
384 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
385 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
386 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
387 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
388 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
389 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
390
391 /* common read only iface attribute */
392 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
393 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
394 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
395 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
396 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
397 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
398 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
399 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
400 iscsi_iface_net_attr(iface, tcp_nagle_disable,
401 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
402 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
403 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
404 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
405 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
406 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
407 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
408
409 /* common iscsi specific settings attributes */
410 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
411 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
412 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
413 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
414 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
415 iscsi_iface_attr(iface, data_seq_in_order,
416 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
417 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
418 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
419 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
420 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
421 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
422 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
423 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
424 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
425 iscsi_iface_attr(iface, discovery_auth_optional,
426 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
427 iscsi_iface_attr(iface, discovery_logout,
428 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
429 iscsi_iface_attr(iface, strict_login_comp_en,
430 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
431 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
432
433 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
434 struct attribute *attr, int i)
435 {
436 struct device *dev = container_of(kobj, struct device, kobj);
437 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
438 struct iscsi_transport *t = iface->transport;
439 int param;
440 int param_type;
441
442 if (attr == &dev_attr_iface_enabled.attr)
443 param = ISCSI_NET_PARAM_IFACE_ENABLE;
444 else if (attr == &dev_attr_iface_vlan_id.attr)
445 param = ISCSI_NET_PARAM_VLAN_ID;
446 else if (attr == &dev_attr_iface_vlan_priority.attr)
447 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
448 else if (attr == &dev_attr_iface_vlan_enabled.attr)
449 param = ISCSI_NET_PARAM_VLAN_ENABLED;
450 else if (attr == &dev_attr_iface_mtu.attr)
451 param = ISCSI_NET_PARAM_MTU;
452 else if (attr == &dev_attr_iface_port.attr)
453 param = ISCSI_NET_PARAM_PORT;
454 else if (attr == &dev_attr_iface_ipaddress_state.attr)
455 param = ISCSI_NET_PARAM_IPADDR_STATE;
456 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
457 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
458 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
459 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
460 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
461 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
462 else if (attr == &dev_attr_iface_tcp_wsf.attr)
463 param = ISCSI_NET_PARAM_TCP_WSF;
464 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
465 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
466 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
467 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
468 else if (attr == &dev_attr_iface_cache_id.attr)
469 param = ISCSI_NET_PARAM_CACHE_ID;
470 else if (attr == &dev_attr_iface_redirect_en.attr)
471 param = ISCSI_NET_PARAM_REDIRECT_EN;
472 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
473 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
474 else if (attr == &dev_attr_iface_header_digest.attr)
475 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
476 else if (attr == &dev_attr_iface_data_digest.attr)
477 param = ISCSI_IFACE_PARAM_DATADGST_EN;
478 else if (attr == &dev_attr_iface_immediate_data.attr)
479 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
480 else if (attr == &dev_attr_iface_initial_r2t.attr)
481 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
482 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
483 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
484 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
485 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
486 else if (attr == &dev_attr_iface_erl.attr)
487 param = ISCSI_IFACE_PARAM_ERL;
488 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
489 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
490 else if (attr == &dev_attr_iface_first_burst_len.attr)
491 param = ISCSI_IFACE_PARAM_FIRST_BURST;
492 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
493 param = ISCSI_IFACE_PARAM_MAX_R2T;
494 else if (attr == &dev_attr_iface_max_burst_len.attr)
495 param = ISCSI_IFACE_PARAM_MAX_BURST;
496 else if (attr == &dev_attr_iface_chap_auth.attr)
497 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
498 else if (attr == &dev_attr_iface_bidi_chap.attr)
499 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
500 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
501 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
502 else if (attr == &dev_attr_iface_discovery_logout.attr)
503 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
504 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
505 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
506 else if (attr == &dev_attr_iface_initiator_name.attr)
507 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
508 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
509 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
510 param = ISCSI_NET_PARAM_IPV4_ADDR;
511 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
512 param = ISCSI_NET_PARAM_IPV4_GW;
513 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
514 param = ISCSI_NET_PARAM_IPV4_SUBNET;
515 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
516 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
517 else if (attr ==
518 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
519 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
520 else if (attr ==
521 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
522 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
523 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
524 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
525 else if (attr == &dev_attr_ipv4_iface_tos.attr)
526 param = ISCSI_NET_PARAM_IPV4_TOS;
527 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
528 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
529 else if (attr ==
530 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
531 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
532 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
533 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
534 else if (attr ==
535 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
536 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
537 else if (attr ==
538 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
539 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
540 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
541 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
542 else if (attr ==
543 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
544 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
545 else if (attr ==
546 &dev_attr_ipv4_iface_fragment_disable.attr)
547 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
548 else if (attr ==
549 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
550 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
551 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
552 param = ISCSI_NET_PARAM_IPV4_TTL;
553 else
554 return 0;
555 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
556 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
557 param = ISCSI_NET_PARAM_IPV6_ADDR;
558 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
559 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
560 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
561 param = ISCSI_NET_PARAM_IPV6_ROUTER;
562 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
563 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
564 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
565 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
566 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
567 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
568 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
569 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
570 else if (attr ==
571 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
572 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
573 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
574 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
575 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
576 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
577 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
578 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
579 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
580 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
581 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
582 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
583 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
584 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
585 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
586 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
587 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
588 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
589 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
590 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
591 else
592 return 0;
593 } else {
594 WARN_ONCE(1, "Invalid iface attr");
595 return 0;
596 }
597
598 switch (param) {
599 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
600 case ISCSI_IFACE_PARAM_HDRDGST_EN:
601 case ISCSI_IFACE_PARAM_DATADGST_EN:
602 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
603 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
604 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
605 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
606 case ISCSI_IFACE_PARAM_ERL:
607 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
608 case ISCSI_IFACE_PARAM_FIRST_BURST:
609 case ISCSI_IFACE_PARAM_MAX_R2T:
610 case ISCSI_IFACE_PARAM_MAX_BURST:
611 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
612 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
613 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
614 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
615 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
616 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
617 param_type = ISCSI_IFACE_PARAM;
618 break;
619 default:
620 param_type = ISCSI_NET_PARAM;
621 }
622
623 return t->attr_is_visible(param_type, param);
624 }
625
626 static struct attribute *iscsi_iface_attrs[] = {
627 &dev_attr_iface_enabled.attr,
628 &dev_attr_iface_vlan_id.attr,
629 &dev_attr_iface_vlan_priority.attr,
630 &dev_attr_iface_vlan_enabled.attr,
631 &dev_attr_ipv4_iface_ipaddress.attr,
632 &dev_attr_ipv4_iface_gateway.attr,
633 &dev_attr_ipv4_iface_subnet.attr,
634 &dev_attr_ipv4_iface_bootproto.attr,
635 &dev_attr_ipv6_iface_ipaddress.attr,
636 &dev_attr_ipv6_iface_link_local_addr.attr,
637 &dev_attr_ipv6_iface_router_addr.attr,
638 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
639 &dev_attr_ipv6_iface_link_local_autocfg.attr,
640 &dev_attr_iface_mtu.attr,
641 &dev_attr_iface_port.attr,
642 &dev_attr_iface_ipaddress_state.attr,
643 &dev_attr_iface_delayed_ack_en.attr,
644 &dev_attr_iface_tcp_nagle_disable.attr,
645 &dev_attr_iface_tcp_wsf_disable.attr,
646 &dev_attr_iface_tcp_wsf.attr,
647 &dev_attr_iface_tcp_timer_scale.attr,
648 &dev_attr_iface_tcp_timestamp_en.attr,
649 &dev_attr_iface_cache_id.attr,
650 &dev_attr_iface_redirect_en.attr,
651 &dev_attr_iface_def_taskmgmt_tmo.attr,
652 &dev_attr_iface_header_digest.attr,
653 &dev_attr_iface_data_digest.attr,
654 &dev_attr_iface_immediate_data.attr,
655 &dev_attr_iface_initial_r2t.attr,
656 &dev_attr_iface_data_seq_in_order.attr,
657 &dev_attr_iface_data_pdu_in_order.attr,
658 &dev_attr_iface_erl.attr,
659 &dev_attr_iface_max_recv_dlength.attr,
660 &dev_attr_iface_first_burst_len.attr,
661 &dev_attr_iface_max_outstanding_r2t.attr,
662 &dev_attr_iface_max_burst_len.attr,
663 &dev_attr_iface_chap_auth.attr,
664 &dev_attr_iface_bidi_chap.attr,
665 &dev_attr_iface_discovery_auth_optional.attr,
666 &dev_attr_iface_discovery_logout.attr,
667 &dev_attr_iface_strict_login_comp_en.attr,
668 &dev_attr_iface_initiator_name.attr,
669 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
670 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
671 &dev_attr_ipv4_iface_tos_en.attr,
672 &dev_attr_ipv4_iface_tos.attr,
673 &dev_attr_ipv4_iface_grat_arp_en.attr,
674 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
675 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
676 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
677 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
678 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
679 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
680 &dev_attr_ipv4_iface_fragment_disable.attr,
681 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
682 &dev_attr_ipv4_iface_ttl.attr,
683 &dev_attr_ipv6_iface_link_local_state.attr,
684 &dev_attr_ipv6_iface_router_state.attr,
685 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
686 &dev_attr_ipv6_iface_mld_en.attr,
687 &dev_attr_ipv6_iface_flow_label.attr,
688 &dev_attr_ipv6_iface_traffic_class.attr,
689 &dev_attr_ipv6_iface_hop_limit.attr,
690 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
691 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
692 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
693 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
694 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
695 NULL,
696 };
697
698 static struct attribute_group iscsi_iface_group = {
699 .attrs = iscsi_iface_attrs,
700 .is_visible = iscsi_iface_attr_is_visible,
701 };
702
703 /* convert iscsi_ipaddress_state values to ascii string name */
704 static const struct {
705 enum iscsi_ipaddress_state value;
706 char *name;
707 } iscsi_ipaddress_state_names[] = {
708 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
709 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
710 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
711 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
712 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
713 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
714 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
715 };
716
717 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
718 {
719 int i;
720 char *state = NULL;
721
722 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
723 if (iscsi_ipaddress_state_names[i].value == port_state) {
724 state = iscsi_ipaddress_state_names[i].name;
725 break;
726 }
727 }
728 return state;
729 }
730 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
731
732 /* convert iscsi_router_state values to ascii string name */
733 static const struct {
734 enum iscsi_router_state value;
735 char *name;
736 } iscsi_router_state_names[] = {
737 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
738 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
739 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
740 {ISCSI_ROUTER_STATE_STALE, "Stale" },
741 };
742
743 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
744 {
745 int i;
746 char *state = NULL;
747
748 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
749 if (iscsi_router_state_names[i].value == router_state) {
750 state = iscsi_router_state_names[i].name;
751 break;
752 }
753 }
754 return state;
755 }
756 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
757
758 struct iscsi_iface *
759 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
760 uint32_t iface_type, uint32_t iface_num, int dd_size)
761 {
762 struct iscsi_iface *iface;
763 int err;
764
765 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
766 if (!iface)
767 return NULL;
768
769 iface->transport = transport;
770 iface->iface_type = iface_type;
771 iface->iface_num = iface_num;
772 iface->dev.release = iscsi_iface_release;
773 iface->dev.class = &iscsi_iface_class;
774 /* parent reference released in iscsi_iface_release */
775 iface->dev.parent = get_device(&shost->shost_gendev);
776 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
777 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
778 iface_num);
779 else
780 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
781 iface_num);
782
783 err = device_register(&iface->dev);
784 if (err)
785 goto free_iface;
786
787 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
788 if (err)
789 goto unreg_iface;
790
791 if (dd_size)
792 iface->dd_data = &iface[1];
793 return iface;
794
795 unreg_iface:
796 device_unregister(&iface->dev);
797 return NULL;
798
799 free_iface:
800 put_device(iface->dev.parent);
801 kfree(iface);
802 return NULL;
803 }
804 EXPORT_SYMBOL_GPL(iscsi_create_iface);
805
806 void iscsi_destroy_iface(struct iscsi_iface *iface)
807 {
808 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
809 device_unregister(&iface->dev);
810 }
811 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
812
813 /*
814 * Interface to display flash node params to sysfs
815 */
816
817 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
818 struct device_attribute dev_attr_##_prefix##_##_name = \
819 __ATTR(_name, _mode, _show, _store)
820
821 /* flash node session attrs show */
822 #define iscsi_flashnode_sess_attr_show(type, name, param) \
823 static ssize_t \
824 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
825 char *buf) \
826 { \
827 struct iscsi_bus_flash_session *fnode_sess = \
828 iscsi_dev_to_flash_session(dev);\
829 struct iscsi_transport *t = fnode_sess->transport; \
830 return t->get_flashnode_param(fnode_sess, param, buf); \
831 } \
832
833
834 #define iscsi_flashnode_sess_attr(type, name, param) \
835 iscsi_flashnode_sess_attr_show(type, name, param) \
836 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
837 show_##type##_##name, NULL);
838
839 /* Flash node session attributes */
840
841 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
842 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
843 iscsi_flashnode_sess_attr(fnode, discovery_session,
844 ISCSI_FLASHNODE_DISCOVERY_SESS);
845 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
846 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
847 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
848 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
849 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
850 ISCSI_FLASHNODE_DATASEQ_INORDER);
851 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
852 ISCSI_FLASHNODE_PDU_INORDER);
853 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
854 iscsi_flashnode_sess_attr(fnode, discovery_logout,
855 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
856 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
857 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
858 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
859 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
860 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
861 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
862 iscsi_flashnode_sess_attr(fnode, def_time2retain,
863 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
864 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
865 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
866 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
867 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
868 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
869 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
870 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
871 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
872 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
873 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
874 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
875 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
876 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
877 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
878 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
879 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
880 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
881 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
882 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
883 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
884
885 static struct attribute *iscsi_flashnode_sess_attrs[] = {
886 &dev_attr_fnode_auto_snd_tgt_disable.attr,
887 &dev_attr_fnode_discovery_session.attr,
888 &dev_attr_fnode_portal_type.attr,
889 &dev_attr_fnode_entry_enable.attr,
890 &dev_attr_fnode_immediate_data.attr,
891 &dev_attr_fnode_initial_r2t.attr,
892 &dev_attr_fnode_data_seq_in_order.attr,
893 &dev_attr_fnode_data_pdu_in_order.attr,
894 &dev_attr_fnode_chap_auth.attr,
895 &dev_attr_fnode_discovery_logout.attr,
896 &dev_attr_fnode_bidi_chap.attr,
897 &dev_attr_fnode_discovery_auth_optional.attr,
898 &dev_attr_fnode_erl.attr,
899 &dev_attr_fnode_first_burst_len.attr,
900 &dev_attr_fnode_def_time2wait.attr,
901 &dev_attr_fnode_def_time2retain.attr,
902 &dev_attr_fnode_max_outstanding_r2t.attr,
903 &dev_attr_fnode_isid.attr,
904 &dev_attr_fnode_tsid.attr,
905 &dev_attr_fnode_max_burst_len.attr,
906 &dev_attr_fnode_def_taskmgmt_tmo.attr,
907 &dev_attr_fnode_targetalias.attr,
908 &dev_attr_fnode_targetname.attr,
909 &dev_attr_fnode_tpgt.attr,
910 &dev_attr_fnode_discovery_parent_idx.attr,
911 &dev_attr_fnode_discovery_parent_type.attr,
912 &dev_attr_fnode_chap_in_idx.attr,
913 &dev_attr_fnode_chap_out_idx.attr,
914 &dev_attr_fnode_username.attr,
915 &dev_attr_fnode_username_in.attr,
916 &dev_attr_fnode_password.attr,
917 &dev_attr_fnode_password_in.attr,
918 &dev_attr_fnode_is_boot_target.attr,
919 NULL,
920 };
921
922 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
923 struct attribute *attr,
924 int i)
925 {
926 struct device *dev = container_of(kobj, struct device, kobj);
927 struct iscsi_bus_flash_session *fnode_sess =
928 iscsi_dev_to_flash_session(dev);
929 struct iscsi_transport *t = fnode_sess->transport;
930 int param;
931
932 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
933 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
934 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
935 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
936 } else if (attr == &dev_attr_fnode_portal_type.attr) {
937 param = ISCSI_FLASHNODE_PORTAL_TYPE;
938 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
939 param = ISCSI_FLASHNODE_ENTRY_EN;
940 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
941 param = ISCSI_FLASHNODE_IMM_DATA_EN;
942 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
943 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
944 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
945 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
946 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
947 param = ISCSI_FLASHNODE_PDU_INORDER;
948 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
949 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
950 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
951 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
952 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
953 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
954 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
955 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
956 } else if (attr == &dev_attr_fnode_erl.attr) {
957 param = ISCSI_FLASHNODE_ERL;
958 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
959 param = ISCSI_FLASHNODE_FIRST_BURST;
960 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
961 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
962 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
963 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
964 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
965 param = ISCSI_FLASHNODE_MAX_R2T;
966 } else if (attr == &dev_attr_fnode_isid.attr) {
967 param = ISCSI_FLASHNODE_ISID;
968 } else if (attr == &dev_attr_fnode_tsid.attr) {
969 param = ISCSI_FLASHNODE_TSID;
970 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
971 param = ISCSI_FLASHNODE_MAX_BURST;
972 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
973 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
974 } else if (attr == &dev_attr_fnode_targetalias.attr) {
975 param = ISCSI_FLASHNODE_ALIAS;
976 } else if (attr == &dev_attr_fnode_targetname.attr) {
977 param = ISCSI_FLASHNODE_NAME;
978 } else if (attr == &dev_attr_fnode_tpgt.attr) {
979 param = ISCSI_FLASHNODE_TPGT;
980 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
981 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
982 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
983 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
984 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
985 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
986 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
987 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
988 } else if (attr == &dev_attr_fnode_username.attr) {
989 param = ISCSI_FLASHNODE_USERNAME;
990 } else if (attr == &dev_attr_fnode_username_in.attr) {
991 param = ISCSI_FLASHNODE_USERNAME_IN;
992 } else if (attr == &dev_attr_fnode_password.attr) {
993 param = ISCSI_FLASHNODE_PASSWORD;
994 } else if (attr == &dev_attr_fnode_password_in.attr) {
995 param = ISCSI_FLASHNODE_PASSWORD_IN;
996 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
997 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
998 } else {
999 WARN_ONCE(1, "Invalid flashnode session attr");
1000 return 0;
1001 }
1002
1003 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1004 }
1005
1006 static struct attribute_group iscsi_flashnode_sess_attr_group = {
1007 .attrs = iscsi_flashnode_sess_attrs,
1008 .is_visible = iscsi_flashnode_sess_attr_is_visible,
1009 };
1010
1011 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1012 &iscsi_flashnode_sess_attr_group,
1013 NULL,
1014 };
1015
1016 static void iscsi_flashnode_sess_release(struct device *dev)
1017 {
1018 struct iscsi_bus_flash_session *fnode_sess =
1019 iscsi_dev_to_flash_session(dev);
1020
1021 kfree(fnode_sess->targetname);
1022 kfree(fnode_sess->targetalias);
1023 kfree(fnode_sess->portal_type);
1024 kfree(fnode_sess);
1025 }
1026
1027 static const struct device_type iscsi_flashnode_sess_dev_type = {
1028 .name = "iscsi_flashnode_sess_dev_type",
1029 .groups = iscsi_flashnode_sess_attr_groups,
1030 .release = iscsi_flashnode_sess_release,
1031 };
1032
1033 /* flash node connection attrs show */
1034 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1035 static ssize_t \
1036 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1037 char *buf) \
1038 { \
1039 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1040 struct iscsi_bus_flash_session *fnode_sess = \
1041 iscsi_flash_conn_to_flash_session(fnode_conn);\
1042 struct iscsi_transport *t = fnode_conn->transport; \
1043 return t->get_flashnode_param(fnode_sess, param, buf); \
1044 } \
1045
1046
1047 #define iscsi_flashnode_conn_attr(type, name, param) \
1048 iscsi_flashnode_conn_attr_show(type, name, param) \
1049 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1050 show_##type##_##name, NULL);
1051
1052 /* Flash node connection attributes */
1053
1054 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1055 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1056 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1057 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1058 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1059 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1060 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1061 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1062 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1063 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1064 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1065 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1066 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1067 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1068 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1069 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1070 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1071 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1072 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1073 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1074 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1075 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1076 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1077 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1078 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1079 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1080 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1081 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1082 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1083 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1084 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1085 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1086 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1087 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1088 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1089 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1090 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1091 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1092 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1093
1094 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1095 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1096 &dev_attr_fnode_header_digest.attr,
1097 &dev_attr_fnode_data_digest.attr,
1098 &dev_attr_fnode_snack_req.attr,
1099 &dev_attr_fnode_tcp_timestamp_stat.attr,
1100 &dev_attr_fnode_tcp_nagle_disable.attr,
1101 &dev_attr_fnode_tcp_wsf_disable.attr,
1102 &dev_attr_fnode_tcp_timer_scale.attr,
1103 &dev_attr_fnode_tcp_timestamp_enable.attr,
1104 &dev_attr_fnode_fragment_disable.attr,
1105 &dev_attr_fnode_max_recv_dlength.attr,
1106 &dev_attr_fnode_max_xmit_dlength.attr,
1107 &dev_attr_fnode_keepalive_tmo.attr,
1108 &dev_attr_fnode_port.attr,
1109 &dev_attr_fnode_ipaddress.attr,
1110 &dev_attr_fnode_redirect_ipaddr.attr,
1111 &dev_attr_fnode_max_segment_size.attr,
1112 &dev_attr_fnode_local_port.attr,
1113 &dev_attr_fnode_ipv4_tos.attr,
1114 &dev_attr_fnode_ipv6_traffic_class.attr,
1115 &dev_attr_fnode_ipv6_flow_label.attr,
1116 &dev_attr_fnode_link_local_ipv6.attr,
1117 &dev_attr_fnode_tcp_xmit_wsf.attr,
1118 &dev_attr_fnode_tcp_recv_wsf.attr,
1119 &dev_attr_fnode_statsn.attr,
1120 &dev_attr_fnode_exp_statsn.attr,
1121 NULL,
1122 };
1123
1124 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1125 struct attribute *attr,
1126 int i)
1127 {
1128 struct device *dev = container_of(kobj, struct device, kobj);
1129 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1130 struct iscsi_transport *t = fnode_conn->transport;
1131 int param;
1132
1133 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1134 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1135 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1136 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1137 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1138 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1139 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1140 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1141 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1142 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1143 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1144 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1145 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1146 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1147 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1148 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1149 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1150 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1151 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1152 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1153 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1154 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1155 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1156 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1157 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1158 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1159 } else if (attr == &dev_attr_fnode_port.attr) {
1160 param = ISCSI_FLASHNODE_PORT;
1161 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1162 param = ISCSI_FLASHNODE_IPADDR;
1163 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1164 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1165 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1166 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1167 } else if (attr == &dev_attr_fnode_local_port.attr) {
1168 param = ISCSI_FLASHNODE_LOCAL_PORT;
1169 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1170 param = ISCSI_FLASHNODE_IPV4_TOS;
1171 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1172 param = ISCSI_FLASHNODE_IPV6_TC;
1173 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1174 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1175 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1176 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1177 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1178 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1179 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1180 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1181 } else if (attr == &dev_attr_fnode_statsn.attr) {
1182 param = ISCSI_FLASHNODE_STATSN;
1183 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1184 param = ISCSI_FLASHNODE_EXP_STATSN;
1185 } else {
1186 WARN_ONCE(1, "Invalid flashnode connection attr");
1187 return 0;
1188 }
1189
1190 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1191 }
1192
1193 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1194 .attrs = iscsi_flashnode_conn_attrs,
1195 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1196 };
1197
1198 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1199 &iscsi_flashnode_conn_attr_group,
1200 NULL,
1201 };
1202
1203 static void iscsi_flashnode_conn_release(struct device *dev)
1204 {
1205 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1206
1207 kfree(fnode_conn->ipaddress);
1208 kfree(fnode_conn->redirect_ipaddr);
1209 kfree(fnode_conn->link_local_ipv6_addr);
1210 kfree(fnode_conn);
1211 }
1212
1213 static const struct device_type iscsi_flashnode_conn_dev_type = {
1214 .name = "iscsi_flashnode_conn_dev_type",
1215 .groups = iscsi_flashnode_conn_attr_groups,
1216 .release = iscsi_flashnode_conn_release,
1217 };
1218
1219 static struct bus_type iscsi_flashnode_bus;
1220
1221 int iscsi_flashnode_bus_match(struct device *dev,
1222 struct device_driver *drv)
1223 {
1224 if (dev->bus == &iscsi_flashnode_bus)
1225 return 1;
1226 return 0;
1227 }
1228 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1229
1230 static struct bus_type iscsi_flashnode_bus = {
1231 .name = "iscsi_flashnode",
1232 .match = &iscsi_flashnode_bus_match,
1233 };
1234
1235 /**
1236 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1237 * @shost: pointer to host data
1238 * @index: index of flashnode to add in sysfs
1239 * @transport: pointer to transport data
1240 * @dd_size: total size to allocate
1241 *
1242 * Adds a sysfs entry for the flashnode session attributes
1243 *
1244 * Returns:
1245 * pointer to allocated flashnode sess on success
1246 * %NULL on failure
1247 */
1248 struct iscsi_bus_flash_session *
1249 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1250 struct iscsi_transport *transport,
1251 int dd_size)
1252 {
1253 struct iscsi_bus_flash_session *fnode_sess;
1254 int err;
1255
1256 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1257 if (!fnode_sess)
1258 return NULL;
1259
1260 fnode_sess->transport = transport;
1261 fnode_sess->target_id = index;
1262 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1263 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1264 fnode_sess->dev.parent = &shost->shost_gendev;
1265 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1266 shost->host_no, index);
1267
1268 err = device_register(&fnode_sess->dev);
1269 if (err)
1270 goto free_fnode_sess;
1271
1272 if (dd_size)
1273 fnode_sess->dd_data = &fnode_sess[1];
1274
1275 return fnode_sess;
1276
1277 free_fnode_sess:
1278 kfree(fnode_sess);
1279 return NULL;
1280 }
1281 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1282
1283 /**
1284 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1285 * @shost: pointer to host data
1286 * @fnode_sess: pointer to the parent flashnode session entry
1287 * @transport: pointer to transport data
1288 * @dd_size: total size to allocate
1289 *
1290 * Adds a sysfs entry for the flashnode connection attributes
1291 *
1292 * Returns:
1293 * pointer to allocated flashnode conn on success
1294 * %NULL on failure
1295 */
1296 struct iscsi_bus_flash_conn *
1297 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1298 struct iscsi_bus_flash_session *fnode_sess,
1299 struct iscsi_transport *transport,
1300 int dd_size)
1301 {
1302 struct iscsi_bus_flash_conn *fnode_conn;
1303 int err;
1304
1305 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1306 if (!fnode_conn)
1307 return NULL;
1308
1309 fnode_conn->transport = transport;
1310 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1311 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1312 fnode_conn->dev.parent = &fnode_sess->dev;
1313 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1314 shost->host_no, fnode_sess->target_id);
1315
1316 err = device_register(&fnode_conn->dev);
1317 if (err)
1318 goto free_fnode_conn;
1319
1320 if (dd_size)
1321 fnode_conn->dd_data = &fnode_conn[1];
1322
1323 return fnode_conn;
1324
1325 free_fnode_conn:
1326 kfree(fnode_conn);
1327 return NULL;
1328 }
1329 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1330
1331 /**
1332 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1333 * @dev: device to verify
1334 * @data: pointer to data containing value to use for verification
1335 *
1336 * Verifies if the passed device is flashnode conn device
1337 *
1338 * Returns:
1339 * 1 on success
1340 * 0 on failure
1341 */
1342 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1343 {
1344 return dev->bus == &iscsi_flashnode_bus;
1345 }
1346
1347 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1348 {
1349 device_unregister(&fnode_conn->dev);
1350 return 0;
1351 }
1352
1353 static int flashnode_match_index(struct device *dev, void *data)
1354 {
1355 struct iscsi_bus_flash_session *fnode_sess = NULL;
1356 int ret = 0;
1357
1358 if (!iscsi_flashnode_bus_match(dev, NULL))
1359 goto exit_match_index;
1360
1361 fnode_sess = iscsi_dev_to_flash_session(dev);
1362 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1363
1364 exit_match_index:
1365 return ret;
1366 }
1367
1368 /**
1369 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1370 * @shost: pointer to host data
1371 * @idx: index to match
1372 *
1373 * Finds the flashnode session object for the passed index
1374 *
1375 * Returns:
1376 * pointer to found flashnode session object on success
1377 * %NULL on failure
1378 */
1379 static struct iscsi_bus_flash_session *
1380 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1381 {
1382 struct iscsi_bus_flash_session *fnode_sess = NULL;
1383 struct device *dev;
1384
1385 dev = device_find_child(&shost->shost_gendev, &idx,
1386 flashnode_match_index);
1387 if (dev)
1388 fnode_sess = iscsi_dev_to_flash_session(dev);
1389
1390 return fnode_sess;
1391 }
1392
1393 /**
1394 * iscsi_find_flashnode_sess - finds flashnode session entry
1395 * @shost: pointer to host data
1396 * @data: pointer to data containing value to use for comparison
1397 * @fn: function pointer that does actual comparison
1398 *
1399 * Finds the flashnode session object comparing the data passed using logic
1400 * defined in passed function pointer
1401 *
1402 * Returns:
1403 * pointer to found flashnode session device object on success
1404 * %NULL on failure
1405 */
1406 struct device *
1407 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1408 int (*fn)(struct device *dev, void *data))
1409 {
1410 return device_find_child(&shost->shost_gendev, data, fn);
1411 }
1412 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1413
1414 /**
1415 * iscsi_find_flashnode_conn - finds flashnode connection entry
1416 * @fnode_sess: pointer to parent flashnode session entry
1417 *
1418 * Finds the flashnode connection object comparing the data passed using logic
1419 * defined in passed function pointer
1420 *
1421 * Returns:
1422 * pointer to found flashnode connection device object on success
1423 * %NULL on failure
1424 */
1425 struct device *
1426 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1427 {
1428 return device_find_child(&fnode_sess->dev, NULL,
1429 iscsi_is_flashnode_conn_dev);
1430 }
1431 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1432
1433 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1434 {
1435 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1436 return 0;
1437
1438 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1439 }
1440
1441 /**
1442 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1443 * @fnode_sess: pointer to flashnode session entry to be destroyed
1444 *
1445 * Deletes the flashnode session entry and all children flashnode connection
1446 * entries from sysfs
1447 */
1448 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1449 {
1450 int err;
1451
1452 err = device_for_each_child(&fnode_sess->dev, NULL,
1453 iscsi_iter_destroy_flashnode_conn_fn);
1454 if (err)
1455 pr_err("Could not delete all connections for %s. Error %d.\n",
1456 fnode_sess->dev.kobj.name, err);
1457
1458 device_unregister(&fnode_sess->dev);
1459 }
1460 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1461
1462 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1463 {
1464 if (!iscsi_flashnode_bus_match(dev, NULL))
1465 return 0;
1466
1467 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1468 return 0;
1469 }
1470
1471 /**
1472 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1473 * @shost: pointer to host data
1474 *
1475 * Destroys all the flashnode session entries and all corresponding children
1476 * flashnode connection entries from sysfs
1477 */
1478 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1479 {
1480 device_for_each_child(&shost->shost_gendev, NULL,
1481 iscsi_iter_destroy_flashnode_fn);
1482 }
1483 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1484
1485 /*
1486 * BSG support
1487 */
1488 /**
1489 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1490 * @job: bsg job to be processed
1491 */
1492 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1493 {
1494 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1495 struct iscsi_bsg_request *req = job->request;
1496 struct iscsi_bsg_reply *reply = job->reply;
1497 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1498 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1499 int ret;
1500
1501 /* check if we have the msgcode value at least */
1502 if (job->request_len < sizeof(uint32_t)) {
1503 ret = -ENOMSG;
1504 goto fail_host_msg;
1505 }
1506
1507 /* Validate the host command */
1508 switch (req->msgcode) {
1509 case ISCSI_BSG_HST_VENDOR:
1510 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1511 if ((shost->hostt->vendor_id == 0L) ||
1512 (req->rqst_data.h_vendor.vendor_id !=
1513 shost->hostt->vendor_id)) {
1514 ret = -ESRCH;
1515 goto fail_host_msg;
1516 }
1517 break;
1518 default:
1519 ret = -EBADR;
1520 goto fail_host_msg;
1521 }
1522
1523 /* check if we really have all the request data needed */
1524 if (job->request_len < cmdlen) {
1525 ret = -ENOMSG;
1526 goto fail_host_msg;
1527 }
1528
1529 ret = i->iscsi_transport->bsg_request(job);
1530 if (!ret)
1531 return 0;
1532
1533 fail_host_msg:
1534 /* return the errno failure code as the only status */
1535 BUG_ON(job->reply_len < sizeof(uint32_t));
1536 reply->reply_payload_rcv_len = 0;
1537 reply->result = ret;
1538 job->reply_len = sizeof(uint32_t);
1539 bsg_job_done(job, ret, 0);
1540 return 0;
1541 }
1542
1543 /**
1544 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1545 * @shost: shost for iscsi_host
1546 * @ihost: iscsi_cls_host adding the structures to
1547 */
1548 static int
1549 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1550 {
1551 struct device *dev = &shost->shost_gendev;
1552 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1553 struct request_queue *q;
1554 char bsg_name[20];
1555
1556 if (!i->iscsi_transport->bsg_request)
1557 return -ENOTSUPP;
1558
1559 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1560 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1561 if (IS_ERR(q)) {
1562 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1563 "initialize - no request queue\n");
1564 return PTR_ERR(q);
1565 }
1566 __scsi_init_queue(shost, q);
1567
1568 ihost->bsg_q = q;
1569 return 0;
1570 }
1571
1572 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1573 struct device *cdev)
1574 {
1575 struct Scsi_Host *shost = dev_to_shost(dev);
1576 struct iscsi_cls_host *ihost = shost->shost_data;
1577
1578 memset(ihost, 0, sizeof(*ihost));
1579 atomic_set(&ihost->nr_scans, 0);
1580 mutex_init(&ihost->mutex);
1581
1582 iscsi_bsg_host_add(shost, ihost);
1583 /* ignore any bsg add error - we just can't do sgio */
1584
1585 return 0;
1586 }
1587
1588 static int iscsi_remove_host(struct transport_container *tc,
1589 struct device *dev, struct device *cdev)
1590 {
1591 struct Scsi_Host *shost = dev_to_shost(dev);
1592 struct iscsi_cls_host *ihost = shost->shost_data;
1593
1594 bsg_remove_queue(ihost->bsg_q);
1595 return 0;
1596 }
1597
1598 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1599 "iscsi_host",
1600 iscsi_setup_host,
1601 iscsi_remove_host,
1602 NULL);
1603
1604 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1605 "iscsi_session",
1606 NULL,
1607 NULL,
1608 NULL);
1609
1610 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1611 "iscsi_connection",
1612 NULL,
1613 NULL,
1614 NULL);
1615
1616 static struct sock *nls;
1617 static DEFINE_MUTEX(rx_queue_mutex);
1618
1619 /*
1620 * conn_mutex protects the {start,bind,stop,destroy}_conn from racing
1621 * against the kernel stop_connection recovery mechanism
1622 */
1623 static DEFINE_MUTEX(conn_mutex);
1624
1625 static LIST_HEAD(sesslist);
1626 static LIST_HEAD(sessdestroylist);
1627 static DEFINE_SPINLOCK(sesslock);
1628 static LIST_HEAD(connlist);
1629 static LIST_HEAD(connlist_err);
1630 static DEFINE_SPINLOCK(connlock);
1631
1632 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1633 {
1634 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1635 return sess->sid;
1636 }
1637
1638 /*
1639 * Returns the matching session to a given sid
1640 */
1641 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1642 {
1643 unsigned long flags;
1644 struct iscsi_cls_session *sess;
1645
1646 spin_lock_irqsave(&sesslock, flags);
1647 list_for_each_entry(sess, &sesslist, sess_list) {
1648 if (sess->sid == sid) {
1649 spin_unlock_irqrestore(&sesslock, flags);
1650 return sess;
1651 }
1652 }
1653 spin_unlock_irqrestore(&sesslock, flags);
1654 return NULL;
1655 }
1656
1657 /*
1658 * Returns the matching connection to a given sid / cid tuple
1659 */
1660 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1661 {
1662 unsigned long flags;
1663 struct iscsi_cls_conn *conn;
1664
1665 spin_lock_irqsave(&connlock, flags);
1666 list_for_each_entry(conn, &connlist, conn_list) {
1667 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1668 spin_unlock_irqrestore(&connlock, flags);
1669 return conn;
1670 }
1671 }
1672 spin_unlock_irqrestore(&connlock, flags);
1673 return NULL;
1674 }
1675
1676 /*
1677 * The following functions can be used by LLDs that allocate
1678 * their own scsi_hosts or by software iscsi LLDs
1679 */
1680 static struct {
1681 int value;
1682 char *name;
1683 } iscsi_session_state_names[] = {
1684 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1685 { ISCSI_SESSION_FAILED, "FAILED" },
1686 { ISCSI_SESSION_FREE, "FREE" },
1687 };
1688
1689 static const char *iscsi_session_state_name(int state)
1690 {
1691 int i;
1692 char *name = NULL;
1693
1694 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1695 if (iscsi_session_state_names[i].value == state) {
1696 name = iscsi_session_state_names[i].name;
1697 break;
1698 }
1699 }
1700 return name;
1701 }
1702
1703 int iscsi_session_chkready(struct iscsi_cls_session *session)
1704 {
1705 unsigned long flags;
1706 int err;
1707
1708 spin_lock_irqsave(&session->lock, flags);
1709 switch (session->state) {
1710 case ISCSI_SESSION_LOGGED_IN:
1711 err = 0;
1712 break;
1713 case ISCSI_SESSION_FAILED:
1714 err = DID_IMM_RETRY << 16;
1715 break;
1716 case ISCSI_SESSION_FREE:
1717 err = DID_TRANSPORT_FAILFAST << 16;
1718 break;
1719 default:
1720 err = DID_NO_CONNECT << 16;
1721 break;
1722 }
1723 spin_unlock_irqrestore(&session->lock, flags);
1724 return err;
1725 }
1726 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1727
1728 int iscsi_is_session_online(struct iscsi_cls_session *session)
1729 {
1730 unsigned long flags;
1731 int ret = 0;
1732
1733 spin_lock_irqsave(&session->lock, flags);
1734 if (session->state == ISCSI_SESSION_LOGGED_IN)
1735 ret = 1;
1736 spin_unlock_irqrestore(&session->lock, flags);
1737 return ret;
1738 }
1739 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1740
1741 static void iscsi_session_release(struct device *dev)
1742 {
1743 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1744 struct Scsi_Host *shost;
1745
1746 shost = iscsi_session_to_shost(session);
1747 scsi_host_put(shost);
1748 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1749 kfree(session);
1750 }
1751
1752 int iscsi_is_session_dev(const struct device *dev)
1753 {
1754 return dev->release == iscsi_session_release;
1755 }
1756 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1757
1758 static int iscsi_iter_session_fn(struct device *dev, void *data)
1759 {
1760 void (* fn) (struct iscsi_cls_session *) = data;
1761
1762 if (!iscsi_is_session_dev(dev))
1763 return 0;
1764 fn(iscsi_dev_to_session(dev));
1765 return 0;
1766 }
1767
1768 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1769 void (*fn)(struct iscsi_cls_session *))
1770 {
1771 device_for_each_child(&shost->shost_gendev, fn,
1772 iscsi_iter_session_fn);
1773 }
1774 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1775
1776 /**
1777 * iscsi_scan_finished - helper to report when running scans are done
1778 * @shost: scsi host
1779 * @time: scan run time
1780 *
1781 * This function can be used by drives like qla4xxx to report to the scsi
1782 * layer when the scans it kicked off at module load time are done.
1783 */
1784 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1785 {
1786 struct iscsi_cls_host *ihost = shost->shost_data;
1787 /*
1788 * qla4xxx will have kicked off some session unblocks before calling
1789 * scsi_scan_host, so just wait for them to complete.
1790 */
1791 return !atomic_read(&ihost->nr_scans);
1792 }
1793 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1794
1795 struct iscsi_scan_data {
1796 unsigned int channel;
1797 unsigned int id;
1798 u64 lun;
1799 enum scsi_scan_mode rescan;
1800 };
1801
1802 static int iscsi_user_scan_session(struct device *dev, void *data)
1803 {
1804 struct iscsi_scan_data *scan_data = data;
1805 struct iscsi_cls_session *session;
1806 struct Scsi_Host *shost;
1807 struct iscsi_cls_host *ihost;
1808 unsigned long flags;
1809 unsigned int id;
1810
1811 if (!iscsi_is_session_dev(dev))
1812 return 0;
1813
1814 session = iscsi_dev_to_session(dev);
1815
1816 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1817
1818 shost = iscsi_session_to_shost(session);
1819 ihost = shost->shost_data;
1820
1821 mutex_lock(&ihost->mutex);
1822 spin_lock_irqsave(&session->lock, flags);
1823 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1824 spin_unlock_irqrestore(&session->lock, flags);
1825 goto user_scan_exit;
1826 }
1827 id = session->target_id;
1828 spin_unlock_irqrestore(&session->lock, flags);
1829
1830 if (id != ISCSI_MAX_TARGET) {
1831 if ((scan_data->channel == SCAN_WILD_CARD ||
1832 scan_data->channel == 0) &&
1833 (scan_data->id == SCAN_WILD_CARD ||
1834 scan_data->id == id))
1835 scsi_scan_target(&session->dev, 0, id,
1836 scan_data->lun, scan_data->rescan);
1837 }
1838
1839 user_scan_exit:
1840 mutex_unlock(&ihost->mutex);
1841 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1842 return 0;
1843 }
1844
1845 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1846 uint id, u64 lun)
1847 {
1848 struct iscsi_scan_data scan_data;
1849
1850 scan_data.channel = channel;
1851 scan_data.id = id;
1852 scan_data.lun = lun;
1853 scan_data.rescan = SCSI_SCAN_MANUAL;
1854
1855 return device_for_each_child(&shost->shost_gendev, &scan_data,
1856 iscsi_user_scan_session);
1857 }
1858
1859 static void iscsi_scan_session(struct work_struct *work)
1860 {
1861 struct iscsi_cls_session *session =
1862 container_of(work, struct iscsi_cls_session, scan_work);
1863 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1864 struct iscsi_cls_host *ihost = shost->shost_data;
1865 struct iscsi_scan_data scan_data;
1866
1867 scan_data.channel = 0;
1868 scan_data.id = SCAN_WILD_CARD;
1869 scan_data.lun = SCAN_WILD_CARD;
1870 scan_data.rescan = SCSI_SCAN_RESCAN;
1871
1872 iscsi_user_scan_session(&session->dev, &scan_data);
1873 atomic_dec(&ihost->nr_scans);
1874 }
1875
1876 /**
1877 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1878 * @cmd: scsi cmd passed to scsi eh handler
1879 *
1880 * If the session is down this function will wait for the recovery
1881 * timer to fire or for the session to be logged back in. If the
1882 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1883 * should pass this error value to the scsi eh.
1884 */
1885 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1886 {
1887 struct iscsi_cls_session *session =
1888 starget_to_session(scsi_target(cmd->device));
1889 unsigned long flags;
1890 int ret = 0;
1891
1892 spin_lock_irqsave(&session->lock, flags);
1893 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1894 if (session->state == ISCSI_SESSION_FREE) {
1895 ret = FAST_IO_FAIL;
1896 break;
1897 }
1898 spin_unlock_irqrestore(&session->lock, flags);
1899 msleep(1000);
1900 spin_lock_irqsave(&session->lock, flags);
1901 }
1902 spin_unlock_irqrestore(&session->lock, flags);
1903 return ret;
1904 }
1905 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1906
1907 static void session_recovery_timedout(struct work_struct *work)
1908 {
1909 struct iscsi_cls_session *session =
1910 container_of(work, struct iscsi_cls_session,
1911 recovery_work.work);
1912 unsigned long flags;
1913
1914 iscsi_cls_session_printk(KERN_INFO, session,
1915 "session recovery timed out after %d secs\n",
1916 session->recovery_tmo);
1917
1918 spin_lock_irqsave(&session->lock, flags);
1919 switch (session->state) {
1920 case ISCSI_SESSION_FAILED:
1921 session->state = ISCSI_SESSION_FREE;
1922 break;
1923 case ISCSI_SESSION_LOGGED_IN:
1924 case ISCSI_SESSION_FREE:
1925 /* we raced with the unblock's flush */
1926 spin_unlock_irqrestore(&session->lock, flags);
1927 return;
1928 }
1929 spin_unlock_irqrestore(&session->lock, flags);
1930
1931 if (session->transport->session_recovery_timedout)
1932 session->transport->session_recovery_timedout(session);
1933
1934 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1935 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1936 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1937 }
1938
1939 static void __iscsi_unblock_session(struct work_struct *work)
1940 {
1941 struct iscsi_cls_session *session =
1942 container_of(work, struct iscsi_cls_session,
1943 unblock_work);
1944 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1945 struct iscsi_cls_host *ihost = shost->shost_data;
1946 unsigned long flags;
1947
1948 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1949 /*
1950 * The recovery and unblock work get run from the same workqueue,
1951 * so try to cancel it if it was going to run after this unblock.
1952 */
1953 cancel_delayed_work(&session->recovery_work);
1954 spin_lock_irqsave(&session->lock, flags);
1955 session->state = ISCSI_SESSION_LOGGED_IN;
1956 spin_unlock_irqrestore(&session->lock, flags);
1957 /* start IO */
1958 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1959 /*
1960 * Only do kernel scanning if the driver is properly hooked into
1961 * the async scanning code (drivers like iscsi_tcp do login and
1962 * scanning from userspace).
1963 */
1964 if (shost->hostt->scan_finished) {
1965 if (scsi_queue_work(shost, &session->scan_work))
1966 atomic_inc(&ihost->nr_scans);
1967 }
1968 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1969 }
1970
1971 /**
1972 * iscsi_unblock_session - set a session as logged in and start IO.
1973 * @session: iscsi session
1974 *
1975 * Mark a session as ready to accept IO.
1976 */
1977 void iscsi_unblock_session(struct iscsi_cls_session *session)
1978 {
1979 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1980 /*
1981 * make sure all the events have completed before tell the driver
1982 * it is safe
1983 */
1984 flush_workqueue(iscsi_eh_timer_workq);
1985 }
1986 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1987
1988 static void __iscsi_block_session(struct work_struct *work)
1989 {
1990 struct iscsi_cls_session *session =
1991 container_of(work, struct iscsi_cls_session,
1992 block_work);
1993 unsigned long flags;
1994
1995 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1996 spin_lock_irqsave(&session->lock, flags);
1997 session->state = ISCSI_SESSION_FAILED;
1998 spin_unlock_irqrestore(&session->lock, flags);
1999 scsi_target_block(&session->dev);
2000 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
2001 if (session->recovery_tmo >= 0)
2002 queue_delayed_work(iscsi_eh_timer_workq,
2003 &session->recovery_work,
2004 session->recovery_tmo * HZ);
2005 }
2006
2007 void iscsi_block_session(struct iscsi_cls_session *session)
2008 {
2009 queue_work(iscsi_eh_timer_workq, &session->block_work);
2010 }
2011 EXPORT_SYMBOL_GPL(iscsi_block_session);
2012
2013 static void __iscsi_unbind_session(struct work_struct *work)
2014 {
2015 struct iscsi_cls_session *session =
2016 container_of(work, struct iscsi_cls_session,
2017 unbind_work);
2018 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2019 struct iscsi_cls_host *ihost = shost->shost_data;
2020 unsigned long flags;
2021 unsigned int target_id;
2022
2023 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2024
2025 /* Prevent new scans and make sure scanning is not in progress */
2026 mutex_lock(&ihost->mutex);
2027 spin_lock_irqsave(&session->lock, flags);
2028 if (session->target_id == ISCSI_MAX_TARGET) {
2029 spin_unlock_irqrestore(&session->lock, flags);
2030 mutex_unlock(&ihost->mutex);
2031 goto unbind_session_exit;
2032 }
2033
2034 target_id = session->target_id;
2035 session->target_id = ISCSI_MAX_TARGET;
2036 spin_unlock_irqrestore(&session->lock, flags);
2037 mutex_unlock(&ihost->mutex);
2038
2039 if (session->ida_used)
2040 ida_simple_remove(&iscsi_sess_ida, target_id);
2041
2042 scsi_remove_target(&session->dev);
2043
2044 unbind_session_exit:
2045 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2046 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2047 }
2048
2049 static void __iscsi_destroy_session(struct work_struct *work)
2050 {
2051 struct iscsi_cls_session *session =
2052 container_of(work, struct iscsi_cls_session, destroy_work);
2053
2054 session->transport->destroy_session(session);
2055 }
2056
2057 struct iscsi_cls_session *
2058 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2059 int dd_size)
2060 {
2061 struct iscsi_cls_session *session;
2062
2063 session = kzalloc(sizeof(*session) + dd_size,
2064 GFP_KERNEL);
2065 if (!session)
2066 return NULL;
2067
2068 session->transport = transport;
2069 session->creator = -1;
2070 session->recovery_tmo = 120;
2071 session->recovery_tmo_sysfs_override = false;
2072 session->state = ISCSI_SESSION_FREE;
2073 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2074 INIT_LIST_HEAD(&session->sess_list);
2075 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2076 INIT_WORK(&session->block_work, __iscsi_block_session);
2077 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2078 INIT_WORK(&session->scan_work, iscsi_scan_session);
2079 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2080 spin_lock_init(&session->lock);
2081
2082 /* this is released in the dev's release function */
2083 scsi_host_get(shost);
2084 session->dev.parent = &shost->shost_gendev;
2085 session->dev.release = iscsi_session_release;
2086 device_initialize(&session->dev);
2087 if (dd_size)
2088 session->dd_data = &session[1];
2089
2090 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2091 return session;
2092 }
2093 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2094
2095 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2096 {
2097 unsigned long flags;
2098 int id = 0;
2099 int err;
2100
2101 session->sid = atomic_add_return(1, &iscsi_session_nr);
2102
2103 if (target_id == ISCSI_MAX_TARGET) {
2104 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2105
2106 if (id < 0) {
2107 iscsi_cls_session_printk(KERN_ERR, session,
2108 "Failure in Target ID Allocation\n");
2109 return id;
2110 }
2111 session->target_id = (unsigned int)id;
2112 session->ida_used = true;
2113 } else
2114 session->target_id = target_id;
2115
2116 dev_set_name(&session->dev, "session%u", session->sid);
2117 err = device_add(&session->dev);
2118 if (err) {
2119 iscsi_cls_session_printk(KERN_ERR, session,
2120 "could not register session's dev\n");
2121 goto release_ida;
2122 }
2123 err = transport_register_device(&session->dev);
2124 if (err) {
2125 iscsi_cls_session_printk(KERN_ERR, session,
2126 "could not register transport's dev\n");
2127 goto release_dev;
2128 }
2129
2130 spin_lock_irqsave(&sesslock, flags);
2131 list_add(&session->sess_list, &sesslist);
2132 spin_unlock_irqrestore(&sesslock, flags);
2133
2134 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2135 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2136 return 0;
2137
2138 release_dev:
2139 device_del(&session->dev);
2140 release_ida:
2141 if (session->ida_used)
2142 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2143
2144 return err;
2145 }
2146 EXPORT_SYMBOL_GPL(iscsi_add_session);
2147
2148 /**
2149 * iscsi_create_session - create iscsi class session
2150 * @shost: scsi host
2151 * @transport: iscsi transport
2152 * @dd_size: private driver data size
2153 * @target_id: which target
2154 *
2155 * This can be called from a LLD or iscsi_transport.
2156 */
2157 struct iscsi_cls_session *
2158 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2159 int dd_size, unsigned int target_id)
2160 {
2161 struct iscsi_cls_session *session;
2162
2163 session = iscsi_alloc_session(shost, transport, dd_size);
2164 if (!session)
2165 return NULL;
2166
2167 if (iscsi_add_session(session, target_id)) {
2168 iscsi_free_session(session);
2169 return NULL;
2170 }
2171 return session;
2172 }
2173 EXPORT_SYMBOL_GPL(iscsi_create_session);
2174
2175 static void iscsi_conn_release(struct device *dev)
2176 {
2177 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2178 struct device *parent = conn->dev.parent;
2179
2180 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2181 kfree(conn);
2182 put_device(parent);
2183 }
2184
2185 static int iscsi_is_conn_dev(const struct device *dev)
2186 {
2187 return dev->release == iscsi_conn_release;
2188 }
2189
2190 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2191 {
2192 if (!iscsi_is_conn_dev(dev))
2193 return 0;
2194 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2195 }
2196
2197 void iscsi_remove_session(struct iscsi_cls_session *session)
2198 {
2199 unsigned long flags;
2200 int err;
2201
2202 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2203
2204 spin_lock_irqsave(&sesslock, flags);
2205 list_del(&session->sess_list);
2206 spin_unlock_irqrestore(&sesslock, flags);
2207
2208 /* make sure there are no blocks/unblocks queued */
2209 flush_workqueue(iscsi_eh_timer_workq);
2210 /* make sure the timedout callout is not running */
2211 if (!cancel_delayed_work(&session->recovery_work))
2212 flush_workqueue(iscsi_eh_timer_workq);
2213 /*
2214 * If we are blocked let commands flow again. The lld or iscsi
2215 * layer should set up the queuecommand to fail commands.
2216 * We assume that LLD will not be calling block/unblock while
2217 * removing the session.
2218 */
2219 spin_lock_irqsave(&session->lock, flags);
2220 session->state = ISCSI_SESSION_FREE;
2221 spin_unlock_irqrestore(&session->lock, flags);
2222
2223 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2224 /* flush running scans then delete devices */
2225 flush_work(&session->scan_work);
2226 /* flush running unbind operations */
2227 flush_work(&session->unbind_work);
2228 __iscsi_unbind_session(&session->unbind_work);
2229
2230 /* hw iscsi may not have removed all connections from session */
2231 err = device_for_each_child(&session->dev, NULL,
2232 iscsi_iter_destroy_conn_fn);
2233 if (err)
2234 iscsi_cls_session_printk(KERN_ERR, session,
2235 "Could not delete all connections "
2236 "for session. Error %d.\n", err);
2237
2238 transport_unregister_device(&session->dev);
2239
2240 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2241 device_del(&session->dev);
2242 }
2243 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2244
2245 void iscsi_free_session(struct iscsi_cls_session *session)
2246 {
2247 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2248 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2249 put_device(&session->dev);
2250 }
2251 EXPORT_SYMBOL_GPL(iscsi_free_session);
2252
2253 /**
2254 * iscsi_create_conn - create iscsi class connection
2255 * @session: iscsi cls session
2256 * @dd_size: private driver data size
2257 * @cid: connection id
2258 *
2259 * This can be called from a LLD or iscsi_transport. The connection
2260 * is child of the session so cid must be unique for all connections
2261 * on the session.
2262 *
2263 * Since we do not support MCS, cid will normally be zero. In some cases
2264 * for software iscsi we could be trying to preallocate a connection struct
2265 * in which case there could be two connection structs and cid would be
2266 * non-zero.
2267 */
2268 struct iscsi_cls_conn *
2269 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2270 {
2271 struct iscsi_transport *transport = session->transport;
2272 struct iscsi_cls_conn *conn;
2273 unsigned long flags;
2274 int err;
2275
2276 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2277 if (!conn)
2278 return NULL;
2279 if (dd_size)
2280 conn->dd_data = &conn[1];
2281
2282 mutex_init(&conn->ep_mutex);
2283 INIT_LIST_HEAD(&conn->conn_list);
2284 INIT_LIST_HEAD(&conn->conn_list_err);
2285 conn->transport = transport;
2286 conn->cid = cid;
2287 conn->state = ISCSI_CONN_DOWN;
2288
2289 /* this is released in the dev's release function */
2290 if (!get_device(&session->dev))
2291 goto free_conn;
2292
2293 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2294 conn->dev.parent = &session->dev;
2295 conn->dev.release = iscsi_conn_release;
2296 err = device_register(&conn->dev);
2297 if (err) {
2298 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2299 "register connection's dev\n");
2300 goto release_parent_ref;
2301 }
2302 err = transport_register_device(&conn->dev);
2303 if (err) {
2304 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2305 "register transport's dev\n");
2306 goto release_conn_ref;
2307 }
2308
2309 spin_lock_irqsave(&connlock, flags);
2310 list_add(&conn->conn_list, &connlist);
2311 spin_unlock_irqrestore(&connlock, flags);
2312
2313 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2314 return conn;
2315
2316 release_conn_ref:
2317 put_device(&conn->dev);
2318 release_parent_ref:
2319 put_device(&session->dev);
2320 free_conn:
2321 kfree(conn);
2322 return NULL;
2323 }
2324
2325 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2326
2327 /**
2328 * iscsi_destroy_conn - destroy iscsi class connection
2329 * @conn: iscsi cls session
2330 *
2331 * This can be called from a LLD or iscsi_transport.
2332 */
2333 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2334 {
2335 unsigned long flags;
2336
2337 spin_lock_irqsave(&connlock, flags);
2338 list_del(&conn->conn_list);
2339 list_del(&conn->conn_list_err);
2340 spin_unlock_irqrestore(&connlock, flags);
2341
2342 transport_unregister_device(&conn->dev);
2343 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2344 device_unregister(&conn->dev);
2345 return 0;
2346 }
2347 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2348
2349 /*
2350 * iscsi interface functions
2351 */
2352 static struct iscsi_internal *
2353 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2354 {
2355 struct iscsi_internal *priv;
2356 unsigned long flags;
2357
2358 spin_lock_irqsave(&iscsi_transport_lock, flags);
2359 list_for_each_entry(priv, &iscsi_transports, list) {
2360 if (tt == priv->iscsi_transport) {
2361 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2362 return priv;
2363 }
2364 }
2365 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2366 return NULL;
2367 }
2368
2369 static int
2370 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2371 {
2372 return nlmsg_multicast(nls, skb, 0, group, gfp);
2373 }
2374
2375 static int
2376 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2377 {
2378 return nlmsg_unicast(nls, skb, portid);
2379 }
2380
2381 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2382 char *data, uint32_t data_size)
2383 {
2384 struct nlmsghdr *nlh;
2385 struct sk_buff *skb;
2386 struct iscsi_uevent *ev;
2387 char *pdu;
2388 struct iscsi_internal *priv;
2389 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2390 data_size);
2391
2392 priv = iscsi_if_transport_lookup(conn->transport);
2393 if (!priv)
2394 return -EINVAL;
2395
2396 skb = alloc_skb(len, GFP_ATOMIC);
2397 if (!skb) {
2398 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2399 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2400 "control PDU: OOM\n");
2401 return -ENOMEM;
2402 }
2403
2404 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2405 ev = nlmsg_data(nlh);
2406 memset(ev, 0, sizeof(*ev));
2407 ev->transport_handle = iscsi_handle(conn->transport);
2408 ev->type = ISCSI_KEVENT_RECV_PDU;
2409 ev->r.recv_req.cid = conn->cid;
2410 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2411 pdu = (char*)ev + sizeof(*ev);
2412 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2413 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2414
2415 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2416 }
2417 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2418
2419 int iscsi_offload_mesg(struct Scsi_Host *shost,
2420 struct iscsi_transport *transport, uint32_t type,
2421 char *data, uint16_t data_size)
2422 {
2423 struct nlmsghdr *nlh;
2424 struct sk_buff *skb;
2425 struct iscsi_uevent *ev;
2426 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2427
2428 skb = alloc_skb(len, GFP_ATOMIC);
2429 if (!skb) {
2430 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2431 return -ENOMEM;
2432 }
2433
2434 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2435 ev = nlmsg_data(nlh);
2436 memset(ev, 0, sizeof(*ev));
2437 ev->type = type;
2438 ev->transport_handle = iscsi_handle(transport);
2439 switch (type) {
2440 case ISCSI_KEVENT_PATH_REQ:
2441 ev->r.req_path.host_no = shost->host_no;
2442 break;
2443 case ISCSI_KEVENT_IF_DOWN:
2444 ev->r.notify_if_down.host_no = shost->host_no;
2445 break;
2446 }
2447
2448 memcpy((char *)ev + sizeof(*ev), data, data_size);
2449
2450 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2451 }
2452 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2453
2454 /*
2455 * This can be called without the rx_queue_mutex, if invoked by the kernel
2456 * stop work. But, in that case, it is guaranteed not to race with
2457 * iscsi_destroy by conn_mutex.
2458 */
2459 static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag)
2460 {
2461 /*
2462 * It is important that this path doesn't rely on
2463 * rx_queue_mutex, otherwise, a thread doing allocation on a
2464 * start_session/start_connection could sleep waiting on a
2465 * writeback to a failed iscsi device, that cannot be recovered
2466 * because the lock is held. If we don't hold it here, the
2467 * kernel stop_conn_work_fn has a chance to stop the broken
2468 * session and resolve the allocation.
2469 *
2470 * Still, the user invoked .stop_conn() needs to be serialized
2471 * with stop_conn_work_fn by a private mutex. Not pretty, but
2472 * it works.
2473 */
2474 mutex_lock(&conn_mutex);
2475 conn->transport->stop_conn(conn, flag);
2476 mutex_unlock(&conn_mutex);
2477
2478 }
2479
2480 static void stop_conn_work_fn(struct work_struct *work)
2481 {
2482 struct iscsi_cls_conn *conn, *tmp;
2483 unsigned long flags;
2484 LIST_HEAD(recovery_list);
2485
2486 spin_lock_irqsave(&connlock, flags);
2487 if (list_empty(&connlist_err)) {
2488 spin_unlock_irqrestore(&connlock, flags);
2489 return;
2490 }
2491 list_splice_init(&connlist_err, &recovery_list);
2492 spin_unlock_irqrestore(&connlock, flags);
2493
2494 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) {
2495 uint32_t sid = iscsi_conn_get_sid(conn);
2496 struct iscsi_cls_session *session;
2497
2498 session = iscsi_session_lookup(sid);
2499 if (session) {
2500 if (system_state != SYSTEM_RUNNING) {
2501 session->recovery_tmo = 0;
2502 iscsi_if_stop_conn(conn, STOP_CONN_TERM);
2503 } else {
2504 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER);
2505 }
2506 }
2507
2508 list_del_init(&conn->conn_list_err);
2509 }
2510 }
2511
2512 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2513 {
2514 struct nlmsghdr *nlh;
2515 struct sk_buff *skb;
2516 struct iscsi_uevent *ev;
2517 struct iscsi_internal *priv;
2518 int len = nlmsg_total_size(sizeof(*ev));
2519 unsigned long flags;
2520
2521 spin_lock_irqsave(&connlock, flags);
2522 list_add(&conn->conn_list_err, &connlist_err);
2523 spin_unlock_irqrestore(&connlock, flags);
2524 queue_work(system_unbound_wq, &stop_conn_work);
2525
2526 priv = iscsi_if_transport_lookup(conn->transport);
2527 if (!priv)
2528 return;
2529
2530 skb = alloc_skb(len, GFP_ATOMIC);
2531 if (!skb) {
2532 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2533 "conn error (%d)\n", error);
2534 return;
2535 }
2536
2537 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2538 ev = nlmsg_data(nlh);
2539 ev->transport_handle = iscsi_handle(conn->transport);
2540 ev->type = ISCSI_KEVENT_CONN_ERROR;
2541 ev->r.connerror.error = error;
2542 ev->r.connerror.cid = conn->cid;
2543 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2544
2545 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2546
2547 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2548 error);
2549 }
2550 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2551
2552 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2553 enum iscsi_conn_state state)
2554 {
2555 struct nlmsghdr *nlh;
2556 struct sk_buff *skb;
2557 struct iscsi_uevent *ev;
2558 struct iscsi_internal *priv;
2559 int len = nlmsg_total_size(sizeof(*ev));
2560
2561 priv = iscsi_if_transport_lookup(conn->transport);
2562 if (!priv)
2563 return;
2564
2565 skb = alloc_skb(len, GFP_ATOMIC);
2566 if (!skb) {
2567 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2568 "conn login (%d)\n", state);
2569 return;
2570 }
2571
2572 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2573 ev = nlmsg_data(nlh);
2574 ev->transport_handle = iscsi_handle(conn->transport);
2575 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2576 ev->r.conn_login.state = state;
2577 ev->r.conn_login.cid = conn->cid;
2578 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2579 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2580
2581 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2582 state);
2583 }
2584 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2585
2586 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2587 enum iscsi_host_event_code code, uint32_t data_size,
2588 uint8_t *data)
2589 {
2590 struct nlmsghdr *nlh;
2591 struct sk_buff *skb;
2592 struct iscsi_uevent *ev;
2593 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2594
2595 skb = alloc_skb(len, GFP_NOIO);
2596 if (!skb) {
2597 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2598 host_no, code);
2599 return;
2600 }
2601
2602 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2603 ev = nlmsg_data(nlh);
2604 ev->transport_handle = iscsi_handle(transport);
2605 ev->type = ISCSI_KEVENT_HOST_EVENT;
2606 ev->r.host_event.host_no = host_no;
2607 ev->r.host_event.code = code;
2608 ev->r.host_event.data_size = data_size;
2609
2610 if (data_size)
2611 memcpy((char *)ev + sizeof(*ev), data, data_size);
2612
2613 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2614 }
2615 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2616
2617 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2618 uint32_t status, uint32_t pid, uint32_t data_size,
2619 uint8_t *data)
2620 {
2621 struct nlmsghdr *nlh;
2622 struct sk_buff *skb;
2623 struct iscsi_uevent *ev;
2624 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2625
2626 skb = alloc_skb(len, GFP_NOIO);
2627 if (!skb) {
2628 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2629 return;
2630 }
2631
2632 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2633 ev = nlmsg_data(nlh);
2634 ev->transport_handle = iscsi_handle(transport);
2635 ev->type = ISCSI_KEVENT_PING_COMP;
2636 ev->r.ping_comp.host_no = host_no;
2637 ev->r.ping_comp.status = status;
2638 ev->r.ping_comp.pid = pid;
2639 ev->r.ping_comp.data_size = data_size;
2640 memcpy((char *)ev + sizeof(*ev), data, data_size);
2641
2642 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2643 }
2644 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2645
2646 static int
2647 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2648 {
2649 struct sk_buff *skb;
2650 struct nlmsghdr *nlh;
2651 int len = nlmsg_total_size(size);
2652
2653 skb = alloc_skb(len, GFP_ATOMIC);
2654 if (!skb) {
2655 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2656 return -ENOMEM;
2657 }
2658
2659 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2660 memcpy(nlmsg_data(nlh), payload, size);
2661 return iscsi_unicast_skb(skb, portid);
2662 }
2663
2664 static int
2665 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2666 {
2667 struct iscsi_uevent *ev = nlmsg_data(nlh);
2668 struct iscsi_stats *stats;
2669 struct sk_buff *skbstat;
2670 struct iscsi_cls_conn *conn;
2671 struct nlmsghdr *nlhstat;
2672 struct iscsi_uevent *evstat;
2673 struct iscsi_internal *priv;
2674 int len = nlmsg_total_size(sizeof(*ev) +
2675 sizeof(struct iscsi_stats) +
2676 sizeof(struct iscsi_stats_custom) *
2677 ISCSI_STATS_CUSTOM_MAX);
2678 int err = 0;
2679
2680 priv = iscsi_if_transport_lookup(transport);
2681 if (!priv)
2682 return -EINVAL;
2683
2684 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2685 if (!conn)
2686 return -EEXIST;
2687
2688 do {
2689 int actual_size;
2690
2691 skbstat = alloc_skb(len, GFP_ATOMIC);
2692 if (!skbstat) {
2693 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2694 "deliver stats: OOM\n");
2695 return -ENOMEM;
2696 }
2697
2698 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2699 (len - sizeof(*nlhstat)), 0);
2700 evstat = nlmsg_data(nlhstat);
2701 memset(evstat, 0, sizeof(*evstat));
2702 evstat->transport_handle = iscsi_handle(conn->transport);
2703 evstat->type = nlh->nlmsg_type;
2704 evstat->u.get_stats.cid =
2705 ev->u.get_stats.cid;
2706 evstat->u.get_stats.sid =
2707 ev->u.get_stats.sid;
2708 stats = (struct iscsi_stats *)
2709 ((char*)evstat + sizeof(*evstat));
2710 memset(stats, 0, sizeof(*stats));
2711
2712 transport->get_stats(conn, stats);
2713 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2714 sizeof(struct iscsi_stats) +
2715 sizeof(struct iscsi_stats_custom) *
2716 stats->custom_length);
2717 actual_size -= sizeof(*nlhstat);
2718 actual_size = nlmsg_msg_size(actual_size);
2719 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2720 nlhstat->nlmsg_len = actual_size;
2721
2722 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2723 GFP_ATOMIC);
2724 } while (err < 0 && err != -ECONNREFUSED);
2725
2726 return err;
2727 }
2728
2729 /**
2730 * iscsi_session_event - send session destr. completion event
2731 * @session: iscsi class session
2732 * @event: type of event
2733 */
2734 int iscsi_session_event(struct iscsi_cls_session *session,
2735 enum iscsi_uevent_e event)
2736 {
2737 struct iscsi_internal *priv;
2738 struct Scsi_Host *shost;
2739 struct iscsi_uevent *ev;
2740 struct sk_buff *skb;
2741 struct nlmsghdr *nlh;
2742 int rc, len = nlmsg_total_size(sizeof(*ev));
2743
2744 priv = iscsi_if_transport_lookup(session->transport);
2745 if (!priv)
2746 return -EINVAL;
2747 shost = iscsi_session_to_shost(session);
2748
2749 skb = alloc_skb(len, GFP_KERNEL);
2750 if (!skb) {
2751 iscsi_cls_session_printk(KERN_ERR, session,
2752 "Cannot notify userspace of session "
2753 "event %u\n", event);
2754 return -ENOMEM;
2755 }
2756
2757 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2758 ev = nlmsg_data(nlh);
2759 ev->transport_handle = iscsi_handle(session->transport);
2760
2761 ev->type = event;
2762 switch (event) {
2763 case ISCSI_KEVENT_DESTROY_SESSION:
2764 ev->r.d_session.host_no = shost->host_no;
2765 ev->r.d_session.sid = session->sid;
2766 break;
2767 case ISCSI_KEVENT_CREATE_SESSION:
2768 ev->r.c_session_ret.host_no = shost->host_no;
2769 ev->r.c_session_ret.sid = session->sid;
2770 break;
2771 case ISCSI_KEVENT_UNBIND_SESSION:
2772 ev->r.unbind_session.host_no = shost->host_no;
2773 ev->r.unbind_session.sid = session->sid;
2774 break;
2775 default:
2776 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2777 "%u.\n", event);
2778 kfree_skb(skb);
2779 return -EINVAL;
2780 }
2781
2782 /*
2783 * this will occur if the daemon is not up, so we just warn
2784 * the user and when the daemon is restarted it will handle it
2785 */
2786 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2787 if (rc == -ESRCH)
2788 iscsi_cls_session_printk(KERN_ERR, session,
2789 "Cannot notify userspace of session "
2790 "event %u. Check iscsi daemon\n",
2791 event);
2792
2793 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2794 event, rc);
2795 return rc;
2796 }
2797 EXPORT_SYMBOL_GPL(iscsi_session_event);
2798
2799 static int
2800 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2801 struct iscsi_uevent *ev, pid_t pid,
2802 uint32_t initial_cmdsn, uint16_t cmds_max,
2803 uint16_t queue_depth)
2804 {
2805 struct iscsi_transport *transport = priv->iscsi_transport;
2806 struct iscsi_cls_session *session;
2807 struct Scsi_Host *shost;
2808
2809 session = transport->create_session(ep, cmds_max, queue_depth,
2810 initial_cmdsn);
2811 if (!session)
2812 return -ENOMEM;
2813
2814 session->creator = pid;
2815 shost = iscsi_session_to_shost(session);
2816 ev->r.c_session_ret.host_no = shost->host_no;
2817 ev->r.c_session_ret.sid = session->sid;
2818 ISCSI_DBG_TRANS_SESSION(session,
2819 "Completed creating transport session\n");
2820 return 0;
2821 }
2822
2823 static int
2824 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2825 {
2826 struct iscsi_cls_conn *conn;
2827 struct iscsi_cls_session *session;
2828
2829 session = iscsi_session_lookup(ev->u.c_conn.sid);
2830 if (!session) {
2831 printk(KERN_ERR "iscsi: invalid session %d.\n",
2832 ev->u.c_conn.sid);
2833 return -EINVAL;
2834 }
2835
2836 conn = transport->create_conn(session, ev->u.c_conn.cid);
2837 if (!conn) {
2838 iscsi_cls_session_printk(KERN_ERR, session,
2839 "couldn't create a new connection.");
2840 return -ENOMEM;
2841 }
2842
2843 ev->r.c_conn_ret.sid = session->sid;
2844 ev->r.c_conn_ret.cid = conn->cid;
2845
2846 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2847 return 0;
2848 }
2849
2850 static int
2851 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2852 {
2853 struct iscsi_cls_conn *conn;
2854 unsigned long flags;
2855
2856 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2857 if (!conn)
2858 return -EINVAL;
2859
2860 spin_lock_irqsave(&connlock, flags);
2861 if (!list_empty(&conn->conn_list_err)) {
2862 spin_unlock_irqrestore(&connlock, flags);
2863 return -EAGAIN;
2864 }
2865 spin_unlock_irqrestore(&connlock, flags);
2866
2867 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2868
2869 mutex_lock(&conn_mutex);
2870 if (transport->destroy_conn)
2871 transport->destroy_conn(conn);
2872 mutex_unlock(&conn_mutex);
2873
2874 return 0;
2875 }
2876
2877 static int
2878 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2879 {
2880 char *data = (char*)ev + sizeof(*ev);
2881 struct iscsi_cls_conn *conn;
2882 struct iscsi_cls_session *session;
2883 int err = 0, value = 0;
2884
2885 session = iscsi_session_lookup(ev->u.set_param.sid);
2886 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2887 if (!conn || !session)
2888 return -EINVAL;
2889
2890 switch (ev->u.set_param.param) {
2891 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2892 sscanf(data, "%d", &value);
2893 if (!session->recovery_tmo_sysfs_override)
2894 session->recovery_tmo = value;
2895 break;
2896 default:
2897 err = transport->set_param(conn, ev->u.set_param.param,
2898 data, ev->u.set_param.len);
2899 }
2900
2901 return err;
2902 }
2903
2904 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2905 struct iscsi_uevent *ev, int msg_type)
2906 {
2907 struct iscsi_endpoint *ep;
2908 struct sockaddr *dst_addr;
2909 struct Scsi_Host *shost = NULL;
2910 int non_blocking, err = 0;
2911
2912 if (!transport->ep_connect)
2913 return -EINVAL;
2914
2915 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2916 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2917 if (!shost) {
2918 printk(KERN_ERR "ep connect failed. Could not find "
2919 "host no %u\n",
2920 ev->u.ep_connect_through_host.host_no);
2921 return -ENODEV;
2922 }
2923 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2924 } else
2925 non_blocking = ev->u.ep_connect.non_blocking;
2926
2927 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2928 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2929 if (IS_ERR(ep)) {
2930 err = PTR_ERR(ep);
2931 goto release_host;
2932 }
2933
2934 ev->r.ep_connect_ret.handle = ep->id;
2935 release_host:
2936 if (shost)
2937 scsi_host_put(shost);
2938 return err;
2939 }
2940
2941 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2942 u64 ep_handle)
2943 {
2944 struct iscsi_cls_conn *conn;
2945 struct iscsi_endpoint *ep;
2946
2947 if (!transport->ep_disconnect)
2948 return -EINVAL;
2949
2950 ep = iscsi_lookup_endpoint(ep_handle);
2951 if (!ep)
2952 return -EINVAL;
2953 conn = ep->conn;
2954 if (conn) {
2955 mutex_lock(&conn->ep_mutex);
2956 conn->ep = NULL;
2957 mutex_unlock(&conn->ep_mutex);
2958 }
2959
2960 transport->ep_disconnect(ep);
2961 return 0;
2962 }
2963
2964 static int
2965 iscsi_if_transport_ep(struct iscsi_transport *transport,
2966 struct iscsi_uevent *ev, int msg_type)
2967 {
2968 struct iscsi_endpoint *ep;
2969 int rc = 0;
2970
2971 switch (msg_type) {
2972 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2973 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2974 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2975 break;
2976 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2977 if (!transport->ep_poll)
2978 return -EINVAL;
2979
2980 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2981 if (!ep)
2982 return -EINVAL;
2983
2984 ev->r.retcode = transport->ep_poll(ep,
2985 ev->u.ep_poll.timeout_ms);
2986 break;
2987 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2988 rc = iscsi_if_ep_disconnect(transport,
2989 ev->u.ep_disconnect.ep_handle);
2990 break;
2991 }
2992 return rc;
2993 }
2994
2995 static int
2996 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2997 struct iscsi_uevent *ev)
2998 {
2999 struct Scsi_Host *shost;
3000 struct sockaddr *dst_addr;
3001 int err;
3002
3003 if (!transport->tgt_dscvr)
3004 return -EINVAL;
3005
3006 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3007 if (!shost) {
3008 printk(KERN_ERR "target discovery could not find host no %u\n",
3009 ev->u.tgt_dscvr.host_no);
3010 return -ENODEV;
3011 }
3012
3013
3014 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3015 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3016 ev->u.tgt_dscvr.enable, dst_addr);
3017 scsi_host_put(shost);
3018 return err;
3019 }
3020
3021 static int
3022 iscsi_set_host_param(struct iscsi_transport *transport,
3023 struct iscsi_uevent *ev)
3024 {
3025 char *data = (char*)ev + sizeof(*ev);
3026 struct Scsi_Host *shost;
3027 int err;
3028
3029 if (!transport->set_host_param)
3030 return -ENOSYS;
3031
3032 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3033 if (!shost) {
3034 printk(KERN_ERR "set_host_param could not find host no %u\n",
3035 ev->u.set_host_param.host_no);
3036 return -ENODEV;
3037 }
3038
3039 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3040 data, ev->u.set_host_param.len);
3041 scsi_host_put(shost);
3042 return err;
3043 }
3044
3045 static int
3046 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3047 {
3048 struct Scsi_Host *shost;
3049 struct iscsi_path *params;
3050 int err;
3051
3052 if (!transport->set_path)
3053 return -ENOSYS;
3054
3055 shost = scsi_host_lookup(ev->u.set_path.host_no);
3056 if (!shost) {
3057 printk(KERN_ERR "set path could not find host no %u\n",
3058 ev->u.set_path.host_no);
3059 return -ENODEV;
3060 }
3061
3062 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3063 err = transport->set_path(shost, params);
3064
3065 scsi_host_put(shost);
3066 return err;
3067 }
3068
3069 static int iscsi_session_has_conns(int sid)
3070 {
3071 struct iscsi_cls_conn *conn;
3072 unsigned long flags;
3073 int found = 0;
3074
3075 spin_lock_irqsave(&connlock, flags);
3076 list_for_each_entry(conn, &connlist, conn_list) {
3077 if (iscsi_conn_get_sid(conn) == sid) {
3078 found = 1;
3079 break;
3080 }
3081 }
3082 spin_unlock_irqrestore(&connlock, flags);
3083
3084 return found;
3085 }
3086
3087 static int
3088 iscsi_set_iface_params(struct iscsi_transport *transport,
3089 struct iscsi_uevent *ev, uint32_t len)
3090 {
3091 char *data = (char *)ev + sizeof(*ev);
3092 struct Scsi_Host *shost;
3093 int err;
3094
3095 if (!transport->set_iface_param)
3096 return -ENOSYS;
3097
3098 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3099 if (!shost) {
3100 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3101 ev->u.set_iface_params.host_no);
3102 return -ENODEV;
3103 }
3104
3105 err = transport->set_iface_param(shost, data, len);
3106 scsi_host_put(shost);
3107 return err;
3108 }
3109
3110 static int
3111 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3112 {
3113 struct Scsi_Host *shost;
3114 struct sockaddr *dst_addr;
3115 int err;
3116
3117 if (!transport->send_ping)
3118 return -ENOSYS;
3119
3120 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3121 if (!shost) {
3122 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3123 ev->u.iscsi_ping.host_no);
3124 return -ENODEV;
3125 }
3126
3127 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3128 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3129 ev->u.iscsi_ping.iface_type,
3130 ev->u.iscsi_ping.payload_size,
3131 ev->u.iscsi_ping.pid,
3132 dst_addr);
3133 scsi_host_put(shost);
3134 return err;
3135 }
3136
3137 static int
3138 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3139 {
3140 struct iscsi_uevent *ev = nlmsg_data(nlh);
3141 struct Scsi_Host *shost = NULL;
3142 struct iscsi_chap_rec *chap_rec;
3143 struct iscsi_internal *priv;
3144 struct sk_buff *skbchap;
3145 struct nlmsghdr *nlhchap;
3146 struct iscsi_uevent *evchap;
3147 uint32_t chap_buf_size;
3148 int len, err = 0;
3149 char *buf;
3150
3151 if (!transport->get_chap)
3152 return -EINVAL;
3153
3154 priv = iscsi_if_transport_lookup(transport);
3155 if (!priv)
3156 return -EINVAL;
3157
3158 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3159 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3160
3161 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3162 if (!shost) {
3163 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3164 __func__, ev->u.get_chap.host_no);
3165 return -ENODEV;
3166 }
3167
3168 do {
3169 int actual_size;
3170
3171 skbchap = alloc_skb(len, GFP_KERNEL);
3172 if (!skbchap) {
3173 printk(KERN_ERR "can not deliver chap: OOM\n");
3174 err = -ENOMEM;
3175 goto exit_get_chap;
3176 }
3177
3178 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3179 (len - sizeof(*nlhchap)), 0);
3180 evchap = nlmsg_data(nlhchap);
3181 memset(evchap, 0, sizeof(*evchap));
3182 evchap->transport_handle = iscsi_handle(transport);
3183 evchap->type = nlh->nlmsg_type;
3184 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3185 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3186 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3187 buf = (char *)evchap + sizeof(*evchap);
3188 memset(buf, 0, chap_buf_size);
3189
3190 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3191 &evchap->u.get_chap.num_entries, buf);
3192
3193 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3194 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3195 nlhchap->nlmsg_len = actual_size;
3196
3197 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3198 GFP_KERNEL);
3199 } while (err < 0 && err != -ECONNREFUSED);
3200
3201 exit_get_chap:
3202 scsi_host_put(shost);
3203 return err;
3204 }
3205
3206 static int iscsi_set_chap(struct iscsi_transport *transport,
3207 struct iscsi_uevent *ev, uint32_t len)
3208 {
3209 char *data = (char *)ev + sizeof(*ev);
3210 struct Scsi_Host *shost;
3211 int err = 0;
3212
3213 if (!transport->set_chap)
3214 return -ENOSYS;
3215
3216 shost = scsi_host_lookup(ev->u.set_path.host_no);
3217 if (!shost) {
3218 pr_err("%s could not find host no %u\n",
3219 __func__, ev->u.set_path.host_no);
3220 return -ENODEV;
3221 }
3222
3223 err = transport->set_chap(shost, data, len);
3224 scsi_host_put(shost);
3225 return err;
3226 }
3227
3228 static int iscsi_delete_chap(struct iscsi_transport *transport,
3229 struct iscsi_uevent *ev)
3230 {
3231 struct Scsi_Host *shost;
3232 int err = 0;
3233
3234 if (!transport->delete_chap)
3235 return -ENOSYS;
3236
3237 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3238 if (!shost) {
3239 printk(KERN_ERR "%s could not find host no %u\n",
3240 __func__, ev->u.delete_chap.host_no);
3241 return -ENODEV;
3242 }
3243
3244 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3245 scsi_host_put(shost);
3246 return err;
3247 }
3248
3249 static const struct {
3250 enum iscsi_discovery_parent_type value;
3251 char *name;
3252 } iscsi_discovery_parent_names[] = {
3253 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3254 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3255 {ISCSI_DISC_PARENT_ISNS, "isns" },
3256 };
3257
3258 char *iscsi_get_discovery_parent_name(int parent_type)
3259 {
3260 int i;
3261 char *state = "Unknown!";
3262
3263 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3264 if (iscsi_discovery_parent_names[i].value & parent_type) {
3265 state = iscsi_discovery_parent_names[i].name;
3266 break;
3267 }
3268 }
3269 return state;
3270 }
3271 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3272
3273 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3274 struct iscsi_uevent *ev, uint32_t len)
3275 {
3276 char *data = (char *)ev + sizeof(*ev);
3277 struct Scsi_Host *shost;
3278 struct iscsi_bus_flash_session *fnode_sess;
3279 struct iscsi_bus_flash_conn *fnode_conn;
3280 struct device *dev;
3281 uint32_t idx;
3282 int err = 0;
3283
3284 if (!transport->set_flashnode_param) {
3285 err = -ENOSYS;
3286 goto exit_set_fnode;
3287 }
3288
3289 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3290 if (!shost) {
3291 pr_err("%s could not find host no %u\n",
3292 __func__, ev->u.set_flashnode.host_no);
3293 err = -ENODEV;
3294 goto put_host;
3295 }
3296
3297 idx = ev->u.set_flashnode.flashnode_idx;
3298 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3299 if (!fnode_sess) {
3300 pr_err("%s could not find flashnode %u for host no %u\n",
3301 __func__, idx, ev->u.set_flashnode.host_no);
3302 err = -ENODEV;
3303 goto put_host;
3304 }
3305
3306 dev = iscsi_find_flashnode_conn(fnode_sess);
3307 if (!dev) {
3308 err = -ENODEV;
3309 goto put_sess;
3310 }
3311
3312 fnode_conn = iscsi_dev_to_flash_conn(dev);
3313 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3314 put_device(dev);
3315
3316 put_sess:
3317 put_device(&fnode_sess->dev);
3318
3319 put_host:
3320 scsi_host_put(shost);
3321
3322 exit_set_fnode:
3323 return err;
3324 }
3325
3326 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3327 struct iscsi_uevent *ev, uint32_t len)
3328 {
3329 char *data = (char *)ev + sizeof(*ev);
3330 struct Scsi_Host *shost;
3331 int index;
3332 int err = 0;
3333
3334 if (!transport->new_flashnode) {
3335 err = -ENOSYS;
3336 goto exit_new_fnode;
3337 }
3338
3339 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3340 if (!shost) {
3341 pr_err("%s could not find host no %u\n",
3342 __func__, ev->u.new_flashnode.host_no);
3343 err = -ENODEV;
3344 goto put_host;
3345 }
3346
3347 index = transport->new_flashnode(shost, data, len);
3348
3349 if (index >= 0)
3350 ev->r.new_flashnode_ret.flashnode_idx = index;
3351 else
3352 err = -EIO;
3353
3354 put_host:
3355 scsi_host_put(shost);
3356
3357 exit_new_fnode:
3358 return err;
3359 }
3360
3361 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3362 struct iscsi_uevent *ev)
3363 {
3364 struct Scsi_Host *shost;
3365 struct iscsi_bus_flash_session *fnode_sess;
3366 uint32_t idx;
3367 int err = 0;
3368
3369 if (!transport->del_flashnode) {
3370 err = -ENOSYS;
3371 goto exit_del_fnode;
3372 }
3373
3374 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3375 if (!shost) {
3376 pr_err("%s could not find host no %u\n",
3377 __func__, ev->u.del_flashnode.host_no);
3378 err = -ENODEV;
3379 goto put_host;
3380 }
3381
3382 idx = ev->u.del_flashnode.flashnode_idx;
3383 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3384 if (!fnode_sess) {
3385 pr_err("%s could not find flashnode %u for host no %u\n",
3386 __func__, idx, ev->u.del_flashnode.host_no);
3387 err = -ENODEV;
3388 goto put_host;
3389 }
3390
3391 err = transport->del_flashnode(fnode_sess);
3392 put_device(&fnode_sess->dev);
3393
3394 put_host:
3395 scsi_host_put(shost);
3396
3397 exit_del_fnode:
3398 return err;
3399 }
3400
3401 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3402 struct iscsi_uevent *ev)
3403 {
3404 struct Scsi_Host *shost;
3405 struct iscsi_bus_flash_session *fnode_sess;
3406 struct iscsi_bus_flash_conn *fnode_conn;
3407 struct device *dev;
3408 uint32_t idx;
3409 int err = 0;
3410
3411 if (!transport->login_flashnode) {
3412 err = -ENOSYS;
3413 goto exit_login_fnode;
3414 }
3415
3416 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3417 if (!shost) {
3418 pr_err("%s could not find host no %u\n",
3419 __func__, ev->u.login_flashnode.host_no);
3420 err = -ENODEV;
3421 goto put_host;
3422 }
3423
3424 idx = ev->u.login_flashnode.flashnode_idx;
3425 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3426 if (!fnode_sess) {
3427 pr_err("%s could not find flashnode %u for host no %u\n",
3428 __func__, idx, ev->u.login_flashnode.host_no);
3429 err = -ENODEV;
3430 goto put_host;
3431 }
3432
3433 dev = iscsi_find_flashnode_conn(fnode_sess);
3434 if (!dev) {
3435 err = -ENODEV;
3436 goto put_sess;
3437 }
3438
3439 fnode_conn = iscsi_dev_to_flash_conn(dev);
3440 err = transport->login_flashnode(fnode_sess, fnode_conn);
3441 put_device(dev);
3442
3443 put_sess:
3444 put_device(&fnode_sess->dev);
3445
3446 put_host:
3447 scsi_host_put(shost);
3448
3449 exit_login_fnode:
3450 return err;
3451 }
3452
3453 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3454 struct iscsi_uevent *ev)
3455 {
3456 struct Scsi_Host *shost;
3457 struct iscsi_bus_flash_session *fnode_sess;
3458 struct iscsi_bus_flash_conn *fnode_conn;
3459 struct device *dev;
3460 uint32_t idx;
3461 int err = 0;
3462
3463 if (!transport->logout_flashnode) {
3464 err = -ENOSYS;
3465 goto exit_logout_fnode;
3466 }
3467
3468 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3469 if (!shost) {
3470 pr_err("%s could not find host no %u\n",
3471 __func__, ev->u.logout_flashnode.host_no);
3472 err = -ENODEV;
3473 goto put_host;
3474 }
3475
3476 idx = ev->u.logout_flashnode.flashnode_idx;
3477 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3478 if (!fnode_sess) {
3479 pr_err("%s could not find flashnode %u for host no %u\n",
3480 __func__, idx, ev->u.logout_flashnode.host_no);
3481 err = -ENODEV;
3482 goto put_host;
3483 }
3484
3485 dev = iscsi_find_flashnode_conn(fnode_sess);
3486 if (!dev) {
3487 err = -ENODEV;
3488 goto put_sess;
3489 }
3490
3491 fnode_conn = iscsi_dev_to_flash_conn(dev);
3492
3493 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3494 put_device(dev);
3495
3496 put_sess:
3497 put_device(&fnode_sess->dev);
3498
3499 put_host:
3500 scsi_host_put(shost);
3501
3502 exit_logout_fnode:
3503 return err;
3504 }
3505
3506 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3507 struct iscsi_uevent *ev)
3508 {
3509 struct Scsi_Host *shost;
3510 struct iscsi_cls_session *session;
3511 int err = 0;
3512
3513 if (!transport->logout_flashnode_sid) {
3514 err = -ENOSYS;
3515 goto exit_logout_sid;
3516 }
3517
3518 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3519 if (!shost) {
3520 pr_err("%s could not find host no %u\n",
3521 __func__, ev->u.logout_flashnode.host_no);
3522 err = -ENODEV;
3523 goto put_host;
3524 }
3525
3526 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3527 if (!session) {
3528 pr_err("%s could not find session id %u\n",
3529 __func__, ev->u.logout_flashnode_sid.sid);
3530 err = -EINVAL;
3531 goto put_host;
3532 }
3533
3534 err = transport->logout_flashnode_sid(session);
3535
3536 put_host:
3537 scsi_host_put(shost);
3538
3539 exit_logout_sid:
3540 return err;
3541 }
3542
3543 static int
3544 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3545 {
3546 struct iscsi_uevent *ev = nlmsg_data(nlh);
3547 struct Scsi_Host *shost = NULL;
3548 struct iscsi_internal *priv;
3549 struct sk_buff *skbhost_stats;
3550 struct nlmsghdr *nlhhost_stats;
3551 struct iscsi_uevent *evhost_stats;
3552 int host_stats_size = 0;
3553 int len, err = 0;
3554 char *buf;
3555
3556 if (!transport->get_host_stats)
3557 return -ENOSYS;
3558
3559 priv = iscsi_if_transport_lookup(transport);
3560 if (!priv)
3561 return -EINVAL;
3562
3563 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3564 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3565
3566 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3567 if (!shost) {
3568 pr_err("%s: failed. Could not find host no %u\n",
3569 __func__, ev->u.get_host_stats.host_no);
3570 return -ENODEV;
3571 }
3572
3573 do {
3574 int actual_size;
3575
3576 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3577 if (!skbhost_stats) {
3578 pr_err("cannot deliver host stats: OOM\n");
3579 err = -ENOMEM;
3580 goto exit_host_stats;
3581 }
3582
3583 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3584 (len - sizeof(*nlhhost_stats)), 0);
3585 evhost_stats = nlmsg_data(nlhhost_stats);
3586 memset(evhost_stats, 0, sizeof(*evhost_stats));
3587 evhost_stats->transport_handle = iscsi_handle(transport);
3588 evhost_stats->type = nlh->nlmsg_type;
3589 evhost_stats->u.get_host_stats.host_no =
3590 ev->u.get_host_stats.host_no;
3591 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3592 memset(buf, 0, host_stats_size);
3593
3594 err = transport->get_host_stats(shost, buf, host_stats_size);
3595 if (err) {
3596 kfree_skb(skbhost_stats);
3597 goto exit_host_stats;
3598 }
3599
3600 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3601 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3602 nlhhost_stats->nlmsg_len = actual_size;
3603
3604 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3605 GFP_KERNEL);
3606 } while (err < 0 && err != -ECONNREFUSED);
3607
3608 exit_host_stats:
3609 scsi_host_put(shost);
3610 return err;
3611 }
3612
3613
3614 static int
3615 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3616 {
3617 int err = 0;
3618 u32 portid;
3619 struct iscsi_uevent *ev = nlmsg_data(nlh);
3620 struct iscsi_transport *transport = NULL;
3621 struct iscsi_internal *priv;
3622 struct iscsi_cls_session *session;
3623 struct iscsi_cls_conn *conn;
3624 struct iscsi_endpoint *ep = NULL;
3625
3626 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3627 *group = ISCSI_NL_GRP_UIP;
3628 else
3629 *group = ISCSI_NL_GRP_ISCSID;
3630
3631 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3632 if (!priv)
3633 return -EINVAL;
3634 transport = priv->iscsi_transport;
3635
3636 if (!try_module_get(transport->owner))
3637 return -EINVAL;
3638
3639 portid = NETLINK_CB(skb).portid;
3640
3641 switch (nlh->nlmsg_type) {
3642 case ISCSI_UEVENT_CREATE_SESSION:
3643 err = iscsi_if_create_session(priv, ep, ev,
3644 portid,
3645 ev->u.c_session.initial_cmdsn,
3646 ev->u.c_session.cmds_max,
3647 ev->u.c_session.queue_depth);
3648 break;
3649 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3650 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3651 if (!ep) {
3652 err = -EINVAL;
3653 break;
3654 }
3655
3656 err = iscsi_if_create_session(priv, ep, ev,
3657 portid,
3658 ev->u.c_bound_session.initial_cmdsn,
3659 ev->u.c_bound_session.cmds_max,
3660 ev->u.c_bound_session.queue_depth);
3661 break;
3662 case ISCSI_UEVENT_DESTROY_SESSION:
3663 session = iscsi_session_lookup(ev->u.d_session.sid);
3664 if (!session)
3665 err = -EINVAL;
3666 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3667 err = -EBUSY;
3668 else
3669 transport->destroy_session(session);
3670 break;
3671 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3672 session = iscsi_session_lookup(ev->u.d_session.sid);
3673 if (!session)
3674 err = -EINVAL;
3675 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3676 err = -EBUSY;
3677 else {
3678 unsigned long flags;
3679
3680 /* Prevent this session from being found again */
3681 spin_lock_irqsave(&sesslock, flags);
3682 list_move(&session->sess_list, &sessdestroylist);
3683 spin_unlock_irqrestore(&sesslock, flags);
3684
3685 queue_work(iscsi_destroy_workq, &session->destroy_work);
3686 }
3687 break;
3688 case ISCSI_UEVENT_UNBIND_SESSION:
3689 session = iscsi_session_lookup(ev->u.d_session.sid);
3690 if (session)
3691 scsi_queue_work(iscsi_session_to_shost(session),
3692 &session->unbind_work);
3693 else
3694 err = -EINVAL;
3695 break;
3696 case ISCSI_UEVENT_CREATE_CONN:
3697 err = iscsi_if_create_conn(transport, ev);
3698 break;
3699 case ISCSI_UEVENT_DESTROY_CONN:
3700 err = iscsi_if_destroy_conn(transport, ev);
3701 break;
3702 case ISCSI_UEVENT_BIND_CONN:
3703 session = iscsi_session_lookup(ev->u.b_conn.sid);
3704 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3705
3706 if (conn && conn->ep)
3707 iscsi_if_ep_disconnect(transport, conn->ep->id);
3708
3709 if (!session || !conn) {
3710 err = -EINVAL;
3711 break;
3712 }
3713
3714 mutex_lock(&conn_mutex);
3715 ev->r.retcode = transport->bind_conn(session, conn,
3716 ev->u.b_conn.transport_eph,
3717 ev->u.b_conn.is_leading);
3718 mutex_unlock(&conn_mutex);
3719
3720 if (ev->r.retcode || !transport->ep_connect)
3721 break;
3722
3723 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3724 if (ep) {
3725 ep->conn = conn;
3726
3727 mutex_lock(&conn->ep_mutex);
3728 conn->ep = ep;
3729 mutex_unlock(&conn->ep_mutex);
3730 } else
3731 iscsi_cls_conn_printk(KERN_ERR, conn,
3732 "Could not set ep conn "
3733 "binding\n");
3734 break;
3735 case ISCSI_UEVENT_SET_PARAM:
3736 err = iscsi_set_param(transport, ev);
3737 break;
3738 case ISCSI_UEVENT_START_CONN:
3739 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3740 if (conn) {
3741 mutex_lock(&conn_mutex);
3742 ev->r.retcode = transport->start_conn(conn);
3743 if (!ev->r.retcode)
3744 conn->state = ISCSI_CONN_UP;
3745 mutex_unlock(&conn_mutex);
3746 }
3747 else
3748 err = -EINVAL;
3749 break;
3750 case ISCSI_UEVENT_STOP_CONN:
3751 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3752 if (conn)
3753 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag);
3754 else
3755 err = -EINVAL;
3756 break;
3757 case ISCSI_UEVENT_SEND_PDU:
3758 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3759 if (conn) {
3760 mutex_lock(&conn_mutex);
3761 ev->r.retcode = transport->send_pdu(conn,
3762 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3763 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3764 ev->u.send_pdu.data_size);
3765 mutex_unlock(&conn_mutex);
3766 }
3767 else
3768 err = -EINVAL;
3769 break;
3770 case ISCSI_UEVENT_GET_STATS:
3771 err = iscsi_if_get_stats(transport, nlh);
3772 break;
3773 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3774 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3775 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3776 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3777 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3778 break;
3779 case ISCSI_UEVENT_TGT_DSCVR:
3780 err = iscsi_tgt_dscvr(transport, ev);
3781 break;
3782 case ISCSI_UEVENT_SET_HOST_PARAM:
3783 err = iscsi_set_host_param(transport, ev);
3784 break;
3785 case ISCSI_UEVENT_PATH_UPDATE:
3786 err = iscsi_set_path(transport, ev);
3787 break;
3788 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3789 err = iscsi_set_iface_params(transport, ev,
3790 nlmsg_attrlen(nlh, sizeof(*ev)));
3791 break;
3792 case ISCSI_UEVENT_PING:
3793 err = iscsi_send_ping(transport, ev);
3794 break;
3795 case ISCSI_UEVENT_GET_CHAP:
3796 err = iscsi_get_chap(transport, nlh);
3797 break;
3798 case ISCSI_UEVENT_DELETE_CHAP:
3799 err = iscsi_delete_chap(transport, ev);
3800 break;
3801 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3802 err = iscsi_set_flashnode_param(transport, ev,
3803 nlmsg_attrlen(nlh,
3804 sizeof(*ev)));
3805 break;
3806 case ISCSI_UEVENT_NEW_FLASHNODE:
3807 err = iscsi_new_flashnode(transport, ev,
3808 nlmsg_attrlen(nlh, sizeof(*ev)));
3809 break;
3810 case ISCSI_UEVENT_DEL_FLASHNODE:
3811 err = iscsi_del_flashnode(transport, ev);
3812 break;
3813 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3814 err = iscsi_login_flashnode(transport, ev);
3815 break;
3816 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3817 err = iscsi_logout_flashnode(transport, ev);
3818 break;
3819 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3820 err = iscsi_logout_flashnode_sid(transport, ev);
3821 break;
3822 case ISCSI_UEVENT_SET_CHAP:
3823 err = iscsi_set_chap(transport, ev,
3824 nlmsg_attrlen(nlh, sizeof(*ev)));
3825 break;
3826 case ISCSI_UEVENT_GET_HOST_STATS:
3827 err = iscsi_get_host_stats(transport, nlh);
3828 break;
3829 default:
3830 err = -ENOSYS;
3831 break;
3832 }
3833
3834 module_put(transport->owner);
3835 return err;
3836 }
3837
3838 /*
3839 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3840 * Malformed skbs with wrong lengths or invalid creds are not processed.
3841 */
3842 static void
3843 iscsi_if_rx(struct sk_buff *skb)
3844 {
3845 u32 portid = NETLINK_CB(skb).portid;
3846
3847 mutex_lock(&rx_queue_mutex);
3848 while (skb->len >= NLMSG_HDRLEN) {
3849 int err;
3850 uint32_t rlen;
3851 struct nlmsghdr *nlh;
3852 struct iscsi_uevent *ev;
3853 uint32_t group;
3854 int retries = ISCSI_SEND_MAX_ALLOWED;
3855
3856 nlh = nlmsg_hdr(skb);
3857 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3858 skb->len < nlh->nlmsg_len) {
3859 break;
3860 }
3861
3862 ev = nlmsg_data(nlh);
3863 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3864 if (rlen > skb->len)
3865 rlen = skb->len;
3866
3867 err = iscsi_if_recv_msg(skb, nlh, &group);
3868 if (err) {
3869 ev->type = ISCSI_KEVENT_IF_ERROR;
3870 ev->iferror = err;
3871 }
3872 do {
3873 /*
3874 * special case for GET_STATS:
3875 * on success - sending reply and stats from
3876 * inside of if_recv_msg(),
3877 * on error - fall through.
3878 */
3879 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3880 break;
3881 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3882 break;
3883 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3884 ev, sizeof(*ev));
3885 if (err == -EAGAIN && --retries < 0) {
3886 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3887 break;
3888 }
3889 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3890 skb_pull(skb, rlen);
3891 }
3892 mutex_unlock(&rx_queue_mutex);
3893 }
3894
3895 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3896 struct device_attribute dev_attr_##_prefix##_##_name = \
3897 __ATTR(_name,_mode,_show,_store)
3898
3899 /*
3900 * iSCSI connection attrs
3901 */
3902 #define iscsi_conn_attr_show(param) \
3903 static ssize_t \
3904 show_conn_param_##param(struct device *dev, \
3905 struct device_attribute *attr, char *buf) \
3906 { \
3907 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3908 struct iscsi_transport *t = conn->transport; \
3909 return t->get_conn_param(conn, param, buf); \
3910 }
3911
3912 #define iscsi_conn_attr(field, param) \
3913 iscsi_conn_attr_show(param) \
3914 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3915 NULL);
3916
3917 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3918 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3919 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3920 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3921 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3922 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3923 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3924 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3925 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3926 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3927 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3928 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3929 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3930 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3931 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3932 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3933 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3934 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3935 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3936 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3937 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3938 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3939 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3940 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3941 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3942 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3943 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3944 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3945
3946 static const char *const connection_state_names[] = {
3947 [ISCSI_CONN_UP] = "up",
3948 [ISCSI_CONN_DOWN] = "down",
3949 [ISCSI_CONN_FAILED] = "failed"
3950 };
3951
3952 static ssize_t show_conn_state(struct device *dev,
3953 struct device_attribute *attr, char *buf)
3954 {
3955 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
3956 const char *state = "unknown";
3957
3958 if (conn->state >= 0 &&
3959 conn->state < ARRAY_SIZE(connection_state_names))
3960 state = connection_state_names[conn->state];
3961
3962 return sprintf(buf, "%s\n", state);
3963 }
3964 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
3965 NULL);
3966
3967 #define iscsi_conn_ep_attr_show(param) \
3968 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3969 struct device_attribute *attr,\
3970 char *buf) \
3971 { \
3972 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3973 struct iscsi_transport *t = conn->transport; \
3974 struct iscsi_endpoint *ep; \
3975 ssize_t rc; \
3976 \
3977 /* \
3978 * Need to make sure ep_disconnect does not free the LLD's \
3979 * interconnect resources while we are trying to read them. \
3980 */ \
3981 mutex_lock(&conn->ep_mutex); \
3982 ep = conn->ep; \
3983 if (!ep && t->ep_connect) { \
3984 mutex_unlock(&conn->ep_mutex); \
3985 return -ENOTCONN; \
3986 } \
3987 \
3988 if (ep) \
3989 rc = t->get_ep_param(ep, param, buf); \
3990 else \
3991 rc = t->get_conn_param(conn, param, buf); \
3992 mutex_unlock(&conn->ep_mutex); \
3993 return rc; \
3994 }
3995
3996 #define iscsi_conn_ep_attr(field, param) \
3997 iscsi_conn_ep_attr_show(param) \
3998 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3999 show_conn_ep_param_##param, NULL);
4000
4001 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
4002 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
4003
4004 static struct attribute *iscsi_conn_attrs[] = {
4005 &dev_attr_conn_max_recv_dlength.attr,
4006 &dev_attr_conn_max_xmit_dlength.attr,
4007 &dev_attr_conn_header_digest.attr,
4008 &dev_attr_conn_data_digest.attr,
4009 &dev_attr_conn_ifmarker.attr,
4010 &dev_attr_conn_ofmarker.attr,
4011 &dev_attr_conn_address.attr,
4012 &dev_attr_conn_port.attr,
4013 &dev_attr_conn_exp_statsn.attr,
4014 &dev_attr_conn_persistent_address.attr,
4015 &dev_attr_conn_persistent_port.attr,
4016 &dev_attr_conn_ping_tmo.attr,
4017 &dev_attr_conn_recv_tmo.attr,
4018 &dev_attr_conn_local_port.attr,
4019 &dev_attr_conn_statsn.attr,
4020 &dev_attr_conn_keepalive_tmo.attr,
4021 &dev_attr_conn_max_segment_size.attr,
4022 &dev_attr_conn_tcp_timestamp_stat.attr,
4023 &dev_attr_conn_tcp_wsf_disable.attr,
4024 &dev_attr_conn_tcp_nagle_disable.attr,
4025 &dev_attr_conn_tcp_timer_scale.attr,
4026 &dev_attr_conn_tcp_timestamp_enable.attr,
4027 &dev_attr_conn_fragment_disable.attr,
4028 &dev_attr_conn_ipv4_tos.attr,
4029 &dev_attr_conn_ipv6_traffic_class.attr,
4030 &dev_attr_conn_ipv6_flow_label.attr,
4031 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4032 &dev_attr_conn_tcp_xmit_wsf.attr,
4033 &dev_attr_conn_tcp_recv_wsf.attr,
4034 &dev_attr_conn_local_ipaddr.attr,
4035 &dev_attr_conn_state.attr,
4036 NULL,
4037 };
4038
4039 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4040 struct attribute *attr, int i)
4041 {
4042 struct device *cdev = container_of(kobj, struct device, kobj);
4043 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4044 struct iscsi_transport *t = conn->transport;
4045 int param;
4046
4047 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4048 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4049 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4050 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4051 else if (attr == &dev_attr_conn_header_digest.attr)
4052 param = ISCSI_PARAM_HDRDGST_EN;
4053 else if (attr == &dev_attr_conn_data_digest.attr)
4054 param = ISCSI_PARAM_DATADGST_EN;
4055 else if (attr == &dev_attr_conn_ifmarker.attr)
4056 param = ISCSI_PARAM_IFMARKER_EN;
4057 else if (attr == &dev_attr_conn_ofmarker.attr)
4058 param = ISCSI_PARAM_OFMARKER_EN;
4059 else if (attr == &dev_attr_conn_address.attr)
4060 param = ISCSI_PARAM_CONN_ADDRESS;
4061 else if (attr == &dev_attr_conn_port.attr)
4062 param = ISCSI_PARAM_CONN_PORT;
4063 else if (attr == &dev_attr_conn_exp_statsn.attr)
4064 param = ISCSI_PARAM_EXP_STATSN;
4065 else if (attr == &dev_attr_conn_persistent_address.attr)
4066 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4067 else if (attr == &dev_attr_conn_persistent_port.attr)
4068 param = ISCSI_PARAM_PERSISTENT_PORT;
4069 else if (attr == &dev_attr_conn_ping_tmo.attr)
4070 param = ISCSI_PARAM_PING_TMO;
4071 else if (attr == &dev_attr_conn_recv_tmo.attr)
4072 param = ISCSI_PARAM_RECV_TMO;
4073 else if (attr == &dev_attr_conn_local_port.attr)
4074 param = ISCSI_PARAM_LOCAL_PORT;
4075 else if (attr == &dev_attr_conn_statsn.attr)
4076 param = ISCSI_PARAM_STATSN;
4077 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4078 param = ISCSI_PARAM_KEEPALIVE_TMO;
4079 else if (attr == &dev_attr_conn_max_segment_size.attr)
4080 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4081 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4082 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4083 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4084 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4085 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4086 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4087 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4088 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4089 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4090 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4091 else if (attr == &dev_attr_conn_fragment_disable.attr)
4092 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4093 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4094 param = ISCSI_PARAM_IPV4_TOS;
4095 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4096 param = ISCSI_PARAM_IPV6_TC;
4097 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4098 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4099 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4100 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4101 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4102 param = ISCSI_PARAM_TCP_XMIT_WSF;
4103 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4104 param = ISCSI_PARAM_TCP_RECV_WSF;
4105 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4106 param = ISCSI_PARAM_LOCAL_IPADDR;
4107 else if (attr == &dev_attr_conn_state.attr)
4108 return S_IRUGO;
4109 else {
4110 WARN_ONCE(1, "Invalid conn attr");
4111 return 0;
4112 }
4113
4114 return t->attr_is_visible(ISCSI_PARAM, param);
4115 }
4116
4117 static struct attribute_group iscsi_conn_group = {
4118 .attrs = iscsi_conn_attrs,
4119 .is_visible = iscsi_conn_attr_is_visible,
4120 };
4121
4122 /*
4123 * iSCSI session attrs
4124 */
4125 #define iscsi_session_attr_show(param, perm) \
4126 static ssize_t \
4127 show_session_param_##param(struct device *dev, \
4128 struct device_attribute *attr, char *buf) \
4129 { \
4130 struct iscsi_cls_session *session = \
4131 iscsi_dev_to_session(dev->parent); \
4132 struct iscsi_transport *t = session->transport; \
4133 \
4134 if (perm && !capable(CAP_SYS_ADMIN)) \
4135 return -EACCES; \
4136 return t->get_session_param(session, param, buf); \
4137 }
4138
4139 #define iscsi_session_attr(field, param, perm) \
4140 iscsi_session_attr_show(param, perm) \
4141 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4142 NULL);
4143 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4144 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4145 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4146 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4147 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4148 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4149 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4150 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4151 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4152 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4153 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4154 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4155 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4156 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4157 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4158 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4159 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4160 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4161 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4162 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4163 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4164 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4165 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4166 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4167 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4168 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4169 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4170 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4171 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4172 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4173 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4174 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4175 iscsi_session_attr(discovery_auth_optional,
4176 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4177 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4178 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4179 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4180 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4181 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4182 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4183 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4184
4185 static ssize_t
4186 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4187 char *buf)
4188 {
4189 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4190 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4191 }
4192 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4193 NULL);
4194 static ssize_t
4195 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4196 char *buf)
4197 {
4198 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4199 return sprintf(buf, "%d\n", session->creator);
4200 }
4201 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4202 NULL);
4203 static ssize_t
4204 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4205 char *buf)
4206 {
4207 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4208 return sprintf(buf, "%d\n", session->target_id);
4209 }
4210 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4211 show_priv_session_target_id, NULL);
4212
4213 #define iscsi_priv_session_attr_show(field, format) \
4214 static ssize_t \
4215 show_priv_session_##field(struct device *dev, \
4216 struct device_attribute *attr, char *buf) \
4217 { \
4218 struct iscsi_cls_session *session = \
4219 iscsi_dev_to_session(dev->parent); \
4220 if (session->field == -1) \
4221 return sprintf(buf, "off\n"); \
4222 return sprintf(buf, format"\n", session->field); \
4223 }
4224
4225 #define iscsi_priv_session_attr_store(field) \
4226 static ssize_t \
4227 store_priv_session_##field(struct device *dev, \
4228 struct device_attribute *attr, \
4229 const char *buf, size_t count) \
4230 { \
4231 int val; \
4232 char *cp; \
4233 struct iscsi_cls_session *session = \
4234 iscsi_dev_to_session(dev->parent); \
4235 if ((session->state == ISCSI_SESSION_FREE) || \
4236 (session->state == ISCSI_SESSION_FAILED)) \
4237 return -EBUSY; \
4238 if (strncmp(buf, "off", 3) == 0) { \
4239 session->field = -1; \
4240 session->field##_sysfs_override = true; \
4241 } else { \
4242 val = simple_strtoul(buf, &cp, 0); \
4243 if (*cp != '\0' && *cp != '\n') \
4244 return -EINVAL; \
4245 session->field = val; \
4246 session->field##_sysfs_override = true; \
4247 } \
4248 return count; \
4249 }
4250
4251 #define iscsi_priv_session_rw_attr(field, format) \
4252 iscsi_priv_session_attr_show(field, format) \
4253 iscsi_priv_session_attr_store(field) \
4254 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4255 show_priv_session_##field, \
4256 store_priv_session_##field)
4257
4258 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4259
4260 static struct attribute *iscsi_session_attrs[] = {
4261 &dev_attr_sess_initial_r2t.attr,
4262 &dev_attr_sess_max_outstanding_r2t.attr,
4263 &dev_attr_sess_immediate_data.attr,
4264 &dev_attr_sess_first_burst_len.attr,
4265 &dev_attr_sess_max_burst_len.attr,
4266 &dev_attr_sess_data_pdu_in_order.attr,
4267 &dev_attr_sess_data_seq_in_order.attr,
4268 &dev_attr_sess_erl.attr,
4269 &dev_attr_sess_targetname.attr,
4270 &dev_attr_sess_tpgt.attr,
4271 &dev_attr_sess_password.attr,
4272 &dev_attr_sess_password_in.attr,
4273 &dev_attr_sess_username.attr,
4274 &dev_attr_sess_username_in.attr,
4275 &dev_attr_sess_fast_abort.attr,
4276 &dev_attr_sess_abort_tmo.attr,
4277 &dev_attr_sess_lu_reset_tmo.attr,
4278 &dev_attr_sess_tgt_reset_tmo.attr,
4279 &dev_attr_sess_ifacename.attr,
4280 &dev_attr_sess_initiatorname.attr,
4281 &dev_attr_sess_targetalias.attr,
4282 &dev_attr_sess_boot_root.attr,
4283 &dev_attr_sess_boot_nic.attr,
4284 &dev_attr_sess_boot_target.attr,
4285 &dev_attr_priv_sess_recovery_tmo.attr,
4286 &dev_attr_priv_sess_state.attr,
4287 &dev_attr_priv_sess_creator.attr,
4288 &dev_attr_sess_chap_out_idx.attr,
4289 &dev_attr_sess_chap_in_idx.attr,
4290 &dev_attr_priv_sess_target_id.attr,
4291 &dev_attr_sess_auto_snd_tgt_disable.attr,
4292 &dev_attr_sess_discovery_session.attr,
4293 &dev_attr_sess_portal_type.attr,
4294 &dev_attr_sess_chap_auth.attr,
4295 &dev_attr_sess_discovery_logout.attr,
4296 &dev_attr_sess_bidi_chap.attr,
4297 &dev_attr_sess_discovery_auth_optional.attr,
4298 &dev_attr_sess_def_time2wait.attr,
4299 &dev_attr_sess_def_time2retain.attr,
4300 &dev_attr_sess_isid.attr,
4301 &dev_attr_sess_tsid.attr,
4302 &dev_attr_sess_def_taskmgmt_tmo.attr,
4303 &dev_attr_sess_discovery_parent_idx.attr,
4304 &dev_attr_sess_discovery_parent_type.attr,
4305 NULL,
4306 };
4307
4308 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4309 struct attribute *attr, int i)
4310 {
4311 struct device *cdev = container_of(kobj, struct device, kobj);
4312 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4313 struct iscsi_transport *t = session->transport;
4314 int param;
4315
4316 if (attr == &dev_attr_sess_initial_r2t.attr)
4317 param = ISCSI_PARAM_INITIAL_R2T_EN;
4318 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4319 param = ISCSI_PARAM_MAX_R2T;
4320 else if (attr == &dev_attr_sess_immediate_data.attr)
4321 param = ISCSI_PARAM_IMM_DATA_EN;
4322 else if (attr == &dev_attr_sess_first_burst_len.attr)
4323 param = ISCSI_PARAM_FIRST_BURST;
4324 else if (attr == &dev_attr_sess_max_burst_len.attr)
4325 param = ISCSI_PARAM_MAX_BURST;
4326 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4327 param = ISCSI_PARAM_PDU_INORDER_EN;
4328 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4329 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4330 else if (attr == &dev_attr_sess_erl.attr)
4331 param = ISCSI_PARAM_ERL;
4332 else if (attr == &dev_attr_sess_targetname.attr)
4333 param = ISCSI_PARAM_TARGET_NAME;
4334 else if (attr == &dev_attr_sess_tpgt.attr)
4335 param = ISCSI_PARAM_TPGT;
4336 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4337 param = ISCSI_PARAM_CHAP_IN_IDX;
4338 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4339 param = ISCSI_PARAM_CHAP_OUT_IDX;
4340 else if (attr == &dev_attr_sess_password.attr)
4341 param = ISCSI_PARAM_USERNAME;
4342 else if (attr == &dev_attr_sess_password_in.attr)
4343 param = ISCSI_PARAM_USERNAME_IN;
4344 else if (attr == &dev_attr_sess_username.attr)
4345 param = ISCSI_PARAM_PASSWORD;
4346 else if (attr == &dev_attr_sess_username_in.attr)
4347 param = ISCSI_PARAM_PASSWORD_IN;
4348 else if (attr == &dev_attr_sess_fast_abort.attr)
4349 param = ISCSI_PARAM_FAST_ABORT;
4350 else if (attr == &dev_attr_sess_abort_tmo.attr)
4351 param = ISCSI_PARAM_ABORT_TMO;
4352 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4353 param = ISCSI_PARAM_LU_RESET_TMO;
4354 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4355 param = ISCSI_PARAM_TGT_RESET_TMO;
4356 else if (attr == &dev_attr_sess_ifacename.attr)
4357 param = ISCSI_PARAM_IFACE_NAME;
4358 else if (attr == &dev_attr_sess_initiatorname.attr)
4359 param = ISCSI_PARAM_INITIATOR_NAME;
4360 else if (attr == &dev_attr_sess_targetalias.attr)
4361 param = ISCSI_PARAM_TARGET_ALIAS;
4362 else if (attr == &dev_attr_sess_boot_root.attr)
4363 param = ISCSI_PARAM_BOOT_ROOT;
4364 else if (attr == &dev_attr_sess_boot_nic.attr)
4365 param = ISCSI_PARAM_BOOT_NIC;
4366 else if (attr == &dev_attr_sess_boot_target.attr)
4367 param = ISCSI_PARAM_BOOT_TARGET;
4368 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4369 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4370 else if (attr == &dev_attr_sess_discovery_session.attr)
4371 param = ISCSI_PARAM_DISCOVERY_SESS;
4372 else if (attr == &dev_attr_sess_portal_type.attr)
4373 param = ISCSI_PARAM_PORTAL_TYPE;
4374 else if (attr == &dev_attr_sess_chap_auth.attr)
4375 param = ISCSI_PARAM_CHAP_AUTH_EN;
4376 else if (attr == &dev_attr_sess_discovery_logout.attr)
4377 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4378 else if (attr == &dev_attr_sess_bidi_chap.attr)
4379 param = ISCSI_PARAM_BIDI_CHAP_EN;
4380 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4381 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4382 else if (attr == &dev_attr_sess_def_time2wait.attr)
4383 param = ISCSI_PARAM_DEF_TIME2WAIT;
4384 else if (attr == &dev_attr_sess_def_time2retain.attr)
4385 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4386 else if (attr == &dev_attr_sess_isid.attr)
4387 param = ISCSI_PARAM_ISID;
4388 else if (attr == &dev_attr_sess_tsid.attr)
4389 param = ISCSI_PARAM_TSID;
4390 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4391 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4392 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4393 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4394 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4395 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4396 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4397 return S_IRUGO | S_IWUSR;
4398 else if (attr == &dev_attr_priv_sess_state.attr)
4399 return S_IRUGO;
4400 else if (attr == &dev_attr_priv_sess_creator.attr)
4401 return S_IRUGO;
4402 else if (attr == &dev_attr_priv_sess_target_id.attr)
4403 return S_IRUGO;
4404 else {
4405 WARN_ONCE(1, "Invalid session attr");
4406 return 0;
4407 }
4408
4409 return t->attr_is_visible(ISCSI_PARAM, param);
4410 }
4411
4412 static struct attribute_group iscsi_session_group = {
4413 .attrs = iscsi_session_attrs,
4414 .is_visible = iscsi_session_attr_is_visible,
4415 };
4416
4417 /*
4418 * iSCSI host attrs
4419 */
4420 #define iscsi_host_attr_show(param) \
4421 static ssize_t \
4422 show_host_param_##param(struct device *dev, \
4423 struct device_attribute *attr, char *buf) \
4424 { \
4425 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4426 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4427 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4428 }
4429
4430 #define iscsi_host_attr(field, param) \
4431 iscsi_host_attr_show(param) \
4432 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4433 NULL);
4434
4435 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4436 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4437 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4438 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4439 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4440 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4441
4442 static struct attribute *iscsi_host_attrs[] = {
4443 &dev_attr_host_netdev.attr,
4444 &dev_attr_host_hwaddress.attr,
4445 &dev_attr_host_ipaddress.attr,
4446 &dev_attr_host_initiatorname.attr,
4447 &dev_attr_host_port_state.attr,
4448 &dev_attr_host_port_speed.attr,
4449 NULL,
4450 };
4451
4452 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4453 struct attribute *attr, int i)
4454 {
4455 struct device *cdev = container_of(kobj, struct device, kobj);
4456 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4457 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4458 int param;
4459
4460 if (attr == &dev_attr_host_netdev.attr)
4461 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4462 else if (attr == &dev_attr_host_hwaddress.attr)
4463 param = ISCSI_HOST_PARAM_HWADDRESS;
4464 else if (attr == &dev_attr_host_ipaddress.attr)
4465 param = ISCSI_HOST_PARAM_IPADDRESS;
4466 else if (attr == &dev_attr_host_initiatorname.attr)
4467 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4468 else if (attr == &dev_attr_host_port_state.attr)
4469 param = ISCSI_HOST_PARAM_PORT_STATE;
4470 else if (attr == &dev_attr_host_port_speed.attr)
4471 param = ISCSI_HOST_PARAM_PORT_SPEED;
4472 else {
4473 WARN_ONCE(1, "Invalid host attr");
4474 return 0;
4475 }
4476
4477 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4478 }
4479
4480 static struct attribute_group iscsi_host_group = {
4481 .attrs = iscsi_host_attrs,
4482 .is_visible = iscsi_host_attr_is_visible,
4483 };
4484
4485 /* convert iscsi_port_speed values to ascii string name */
4486 static const struct {
4487 enum iscsi_port_speed value;
4488 char *name;
4489 } iscsi_port_speed_names[] = {
4490 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4491 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4492 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4493 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4494 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4495 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4496 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4497 };
4498
4499 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4500 {
4501 int i;
4502 char *speed = "Unknown!";
4503 struct iscsi_cls_host *ihost = shost->shost_data;
4504 uint32_t port_speed = ihost->port_speed;
4505
4506 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4507 if (iscsi_port_speed_names[i].value & port_speed) {
4508 speed = iscsi_port_speed_names[i].name;
4509 break;
4510 }
4511 }
4512 return speed;
4513 }
4514 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4515
4516 /* convert iscsi_port_state values to ascii string name */
4517 static const struct {
4518 enum iscsi_port_state value;
4519 char *name;
4520 } iscsi_port_state_names[] = {
4521 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4522 {ISCSI_PORT_STATE_UP, "LINK UP" },
4523 };
4524
4525 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4526 {
4527 int i;
4528 char *state = "Unknown!";
4529 struct iscsi_cls_host *ihost = shost->shost_data;
4530 uint32_t port_state = ihost->port_state;
4531
4532 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4533 if (iscsi_port_state_names[i].value & port_state) {
4534 state = iscsi_port_state_names[i].name;
4535 break;
4536 }
4537 }
4538 return state;
4539 }
4540 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4541
4542 static int iscsi_session_match(struct attribute_container *cont,
4543 struct device *dev)
4544 {
4545 struct iscsi_cls_session *session;
4546 struct Scsi_Host *shost;
4547 struct iscsi_internal *priv;
4548
4549 if (!iscsi_is_session_dev(dev))
4550 return 0;
4551
4552 session = iscsi_dev_to_session(dev);
4553 shost = iscsi_session_to_shost(session);
4554 if (!shost->transportt)
4555 return 0;
4556
4557 priv = to_iscsi_internal(shost->transportt);
4558 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4559 return 0;
4560
4561 return &priv->session_cont.ac == cont;
4562 }
4563
4564 static int iscsi_conn_match(struct attribute_container *cont,
4565 struct device *dev)
4566 {
4567 struct iscsi_cls_session *session;
4568 struct iscsi_cls_conn *conn;
4569 struct Scsi_Host *shost;
4570 struct iscsi_internal *priv;
4571
4572 if (!iscsi_is_conn_dev(dev))
4573 return 0;
4574
4575 conn = iscsi_dev_to_conn(dev);
4576 session = iscsi_dev_to_session(conn->dev.parent);
4577 shost = iscsi_session_to_shost(session);
4578
4579 if (!shost->transportt)
4580 return 0;
4581
4582 priv = to_iscsi_internal(shost->transportt);
4583 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4584 return 0;
4585
4586 return &priv->conn_cont.ac == cont;
4587 }
4588
4589 static int iscsi_host_match(struct attribute_container *cont,
4590 struct device *dev)
4591 {
4592 struct Scsi_Host *shost;
4593 struct iscsi_internal *priv;
4594
4595 if (!scsi_is_host_device(dev))
4596 return 0;
4597
4598 shost = dev_to_shost(dev);
4599 if (!shost->transportt ||
4600 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4601 return 0;
4602
4603 priv = to_iscsi_internal(shost->transportt);
4604 return &priv->t.host_attrs.ac == cont;
4605 }
4606
4607 struct scsi_transport_template *
4608 iscsi_register_transport(struct iscsi_transport *tt)
4609 {
4610 struct iscsi_internal *priv;
4611 unsigned long flags;
4612 int err;
4613
4614 BUG_ON(!tt);
4615
4616 priv = iscsi_if_transport_lookup(tt);
4617 if (priv)
4618 return NULL;
4619
4620 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4621 if (!priv)
4622 return NULL;
4623 INIT_LIST_HEAD(&priv->list);
4624 priv->iscsi_transport = tt;
4625 priv->t.user_scan = iscsi_user_scan;
4626 priv->t.create_work_queue = 1;
4627
4628 priv->dev.class = &iscsi_transport_class;
4629 dev_set_name(&priv->dev, "%s", tt->name);
4630 err = device_register(&priv->dev);
4631 if (err)
4632 goto free_priv;
4633
4634 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4635 if (err)
4636 goto unregister_dev;
4637
4638 /* host parameters */
4639 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4640 priv->t.host_attrs.ac.match = iscsi_host_match;
4641 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4642 priv->t.host_size = sizeof(struct iscsi_cls_host);
4643 transport_container_register(&priv->t.host_attrs);
4644
4645 /* connection parameters */
4646 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4647 priv->conn_cont.ac.match = iscsi_conn_match;
4648 priv->conn_cont.ac.grp = &iscsi_conn_group;
4649 transport_container_register(&priv->conn_cont);
4650
4651 /* session parameters */
4652 priv->session_cont.ac.class = &iscsi_session_class.class;
4653 priv->session_cont.ac.match = iscsi_session_match;
4654 priv->session_cont.ac.grp = &iscsi_session_group;
4655 transport_container_register(&priv->session_cont);
4656
4657 spin_lock_irqsave(&iscsi_transport_lock, flags);
4658 list_add(&priv->list, &iscsi_transports);
4659 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4660
4661 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4662 return &priv->t;
4663
4664 unregister_dev:
4665 device_unregister(&priv->dev);
4666 return NULL;
4667 free_priv:
4668 kfree(priv);
4669 return NULL;
4670 }
4671 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4672
4673 int iscsi_unregister_transport(struct iscsi_transport *tt)
4674 {
4675 struct iscsi_internal *priv;
4676 unsigned long flags;
4677
4678 BUG_ON(!tt);
4679
4680 mutex_lock(&rx_queue_mutex);
4681
4682 priv = iscsi_if_transport_lookup(tt);
4683 BUG_ON (!priv);
4684
4685 spin_lock_irqsave(&iscsi_transport_lock, flags);
4686 list_del(&priv->list);
4687 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4688
4689 transport_container_unregister(&priv->conn_cont);
4690 transport_container_unregister(&priv->session_cont);
4691 transport_container_unregister(&priv->t.host_attrs);
4692
4693 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4694 device_unregister(&priv->dev);
4695 mutex_unlock(&rx_queue_mutex);
4696
4697 return 0;
4698 }
4699 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4700
4701 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4702 struct device *dev, const char *fmt, ...)
4703 {
4704 struct va_format vaf;
4705 va_list args;
4706
4707 va_start(args, fmt);
4708 vaf.fmt = fmt;
4709 vaf.va = &args;
4710 trace(dev, &vaf);
4711 va_end(args);
4712 }
4713 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4714
4715 static __init int iscsi_transport_init(void)
4716 {
4717 int err;
4718 struct netlink_kernel_cfg cfg = {
4719 .groups = 1,
4720 .input = iscsi_if_rx,
4721 };
4722 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4723 ISCSI_TRANSPORT_VERSION);
4724
4725 atomic_set(&iscsi_session_nr, 0);
4726
4727 err = class_register(&iscsi_transport_class);
4728 if (err)
4729 return err;
4730
4731 err = class_register(&iscsi_endpoint_class);
4732 if (err)
4733 goto unregister_transport_class;
4734
4735 err = class_register(&iscsi_iface_class);
4736 if (err)
4737 goto unregister_endpoint_class;
4738
4739 err = transport_class_register(&iscsi_host_class);
4740 if (err)
4741 goto unregister_iface_class;
4742
4743 err = transport_class_register(&iscsi_connection_class);
4744 if (err)
4745 goto unregister_host_class;
4746
4747 err = transport_class_register(&iscsi_session_class);
4748 if (err)
4749 goto unregister_conn_class;
4750
4751 err = bus_register(&iscsi_flashnode_bus);
4752 if (err)
4753 goto unregister_session_class;
4754
4755 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4756 if (!nls) {
4757 err = -ENOBUFS;
4758 goto unregister_flashnode_bus;
4759 }
4760
4761 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4762 if (!iscsi_eh_timer_workq) {
4763 err = -ENOMEM;
4764 goto release_nls;
4765 }
4766
4767 iscsi_destroy_workq = create_singlethread_workqueue("iscsi_destroy");
4768 if (!iscsi_destroy_workq) {
4769 err = -ENOMEM;
4770 goto destroy_wq;
4771 }
4772
4773 return 0;
4774
4775 destroy_wq:
4776 destroy_workqueue(iscsi_eh_timer_workq);
4777 release_nls:
4778 netlink_kernel_release(nls);
4779 unregister_flashnode_bus:
4780 bus_unregister(&iscsi_flashnode_bus);
4781 unregister_session_class:
4782 transport_class_unregister(&iscsi_session_class);
4783 unregister_conn_class:
4784 transport_class_unregister(&iscsi_connection_class);
4785 unregister_host_class:
4786 transport_class_unregister(&iscsi_host_class);
4787 unregister_iface_class:
4788 class_unregister(&iscsi_iface_class);
4789 unregister_endpoint_class:
4790 class_unregister(&iscsi_endpoint_class);
4791 unregister_transport_class:
4792 class_unregister(&iscsi_transport_class);
4793 return err;
4794 }
4795
4796 static void __exit iscsi_transport_exit(void)
4797 {
4798 destroy_workqueue(iscsi_destroy_workq);
4799 destroy_workqueue(iscsi_eh_timer_workq);
4800 netlink_kernel_release(nls);
4801 bus_unregister(&iscsi_flashnode_bus);
4802 transport_class_unregister(&iscsi_connection_class);
4803 transport_class_unregister(&iscsi_session_class);
4804 transport_class_unregister(&iscsi_host_class);
4805 class_unregister(&iscsi_endpoint_class);
4806 class_unregister(&iscsi_iface_class);
4807 class_unregister(&iscsi_transport_class);
4808 }
4809
4810 module_init(iscsi_transport_init);
4811 module_exit(iscsi_transport_exit);
4812
4813 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4814 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4815 "Alex Aizman <itn780@yahoo.com>");
4816 MODULE_DESCRIPTION("iSCSI Transport Interface");
4817 MODULE_LICENSE("GPL");
4818 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4819 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux with added FPC-III support