?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
lkdtm: Add Control Flow Integrity test
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_iscsi.c
blob417b868d8735eab8cf1a6dabb669cf0a0fc875a9
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 CREATE_TRACE_POINTS
28 #include <trace/events/iscsi.h>
29
30 /*
31 * Export tracepoint symbols to be used by other modules.
32 */
33 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);
34 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);
35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);
36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);
37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);
38
39 static int dbg_session;
40 module_param_named(debug_session, dbg_session, int,
41 S_IRUGO | S_IWUSR);
42 MODULE_PARM_DESC(debug_session,
43 "Turn on debugging for sessions in scsi_transport_iscsi "
44 "module. Set to 1 to turn on, and zero to turn off. Default "
45 "is off.");
46
47 static int dbg_conn;
48 module_param_named(debug_conn, dbg_conn, int,
49 S_IRUGO | S_IWUSR);
50 MODULE_PARM_DESC(debug_conn,
51 "Turn on debugging for connections in scsi_transport_iscsi "
52 "module. Set to 1 to turn on, and zero to turn off. Default "
53 "is off.");
54
55 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
56 do { \
57 if (dbg_session) \
58 iscsi_cls_session_printk(KERN_INFO, _session, \
59 "%s: " dbg_fmt, \
60 __func__, ##arg); \
61 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \
62 &(_session)->dev, \
63 "%s " dbg_fmt, __func__, ##arg); \
64 } while (0);
65
66 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
67 do { \
68 if (dbg_conn) \
69 iscsi_cls_conn_printk(KERN_INFO, _conn, \
70 "%s: " dbg_fmt, \
71 __func__, ##arg); \
72 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \
73 &(_conn)->dev, \
74 "%s " dbg_fmt, __func__, ##arg); \
75 } while (0);
76
77 struct iscsi_internal {
78 struct scsi_transport_template t;
79 struct iscsi_transport *iscsi_transport;
80 struct list_head list;
81 struct device dev;
82
83 struct transport_container conn_cont;
84 struct transport_container session_cont;
85 };
86
87 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
88 static struct workqueue_struct *iscsi_eh_timer_workq;
89
90 static DEFINE_IDA(iscsi_sess_ida);
91 /*
92 * list of registered transports and lock that must
93 * be held while accessing list. The iscsi_transport_lock must
94 * be acquired after the rx_queue_mutex.
95 */
96 static LIST_HEAD(iscsi_transports);
97 static DEFINE_SPINLOCK(iscsi_transport_lock);
98
99 #define to_iscsi_internal(tmpl) \
100 container_of(tmpl, struct iscsi_internal, t)
101
102 #define dev_to_iscsi_internal(_dev) \
103 container_of(_dev, struct iscsi_internal, dev)
104
105 static void iscsi_transport_release(struct device *dev)
106 {
107 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
108 kfree(priv);
109 }
110
111 /*
112 * iscsi_transport_class represents the iscsi_transports that are
113 * registered.
114 */
115 static struct class iscsi_transport_class = {
116 .name = "iscsi_transport",
117 .dev_release = iscsi_transport_release,
118 };
119
120 static ssize_t
121 show_transport_handle(struct device *dev, struct device_attribute *attr,
122 char *buf)
123 {
124 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
125 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
126 }
127 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
128
129 #define show_transport_attr(name, format) \
130 static ssize_t \
131 show_transport_##name(struct device *dev, \
132 struct device_attribute *attr,char *buf) \
133 { \
134 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
135 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
136 } \
137 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
138
139 show_transport_attr(caps, "0x%x");
140
141 static struct attribute *iscsi_transport_attrs[] = {
142 &dev_attr_handle.attr,
143 &dev_attr_caps.attr,
144 NULL,
145 };
146
147 static struct attribute_group iscsi_transport_group = {
148 .attrs = iscsi_transport_attrs,
149 };
150
151 /*
152 * iSCSI endpoint attrs
153 */
154 #define iscsi_dev_to_endpoint(_dev) \
155 container_of(_dev, struct iscsi_endpoint, dev)
156
157 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
158 struct device_attribute dev_attr_##_prefix##_##_name = \
159 __ATTR(_name,_mode,_show,_store)
160
161 static void iscsi_endpoint_release(struct device *dev)
162 {
163 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
164 kfree(ep);
165 }
166
167 static struct class iscsi_endpoint_class = {
168 .name = "iscsi_endpoint",
169 .dev_release = iscsi_endpoint_release,
170 };
171
172 static ssize_t
173 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
174 {
175 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
176 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
177 }
178 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
179
180 static struct attribute *iscsi_endpoint_attrs[] = {
181 &dev_attr_ep_handle.attr,
182 NULL,
183 };
184
185 static struct attribute_group iscsi_endpoint_group = {
186 .attrs = iscsi_endpoint_attrs,
187 };
188
189 #define ISCSI_MAX_EPID -1
190
191 static int iscsi_match_epid(struct device *dev, const void *data)
192 {
193 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
194 const uint64_t *epid = data;
195
196 return *epid == ep->id;
197 }
198
199 struct iscsi_endpoint *
200 iscsi_create_endpoint(int dd_size)
201 {
202 struct device *dev;
203 struct iscsi_endpoint *ep;
204 uint64_t id;
205 int err;
206
207 for (id = 1; id < ISCSI_MAX_EPID; id++) {
208 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
209 iscsi_match_epid);
210 if (!dev)
211 break;
212 else
213 put_device(dev);
214 }
215 if (id == ISCSI_MAX_EPID) {
216 printk(KERN_ERR "Too many connections. Max supported %u\n",
217 ISCSI_MAX_EPID - 1);
218 return NULL;
219 }
220
221 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
222 if (!ep)
223 return NULL;
224
225 ep->id = id;
226 ep->dev.class = &iscsi_endpoint_class;
227 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
228 err = device_register(&ep->dev);
229 if (err)
230 goto free_ep;
231
232 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
233 if (err)
234 goto unregister_dev;
235
236 if (dd_size)
237 ep->dd_data = &ep[1];
238 return ep;
239
240 unregister_dev:
241 device_unregister(&ep->dev);
242 return NULL;
243
244 free_ep:
245 kfree(ep);
246 return NULL;
247 }
248 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
249
250 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
251 {
252 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
253 device_unregister(&ep->dev);
254 }
255 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
256
257 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
258 {
259 struct iscsi_endpoint *ep;
260 struct device *dev;
261
262 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
263 iscsi_match_epid);
264 if (!dev)
265 return NULL;
266
267 ep = iscsi_dev_to_endpoint(dev);
268 /*
269 * we can drop this now because the interface will prevent
270 * removals and lookups from racing.
271 */
272 put_device(dev);
273 return ep;
274 }
275 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
276
277 /*
278 * Interface to display network param to sysfs
279 */
280
281 static void iscsi_iface_release(struct device *dev)
282 {
283 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
284 struct device *parent = iface->dev.parent;
285
286 kfree(iface);
287 put_device(parent);
288 }
289
290
291 static struct class iscsi_iface_class = {
292 .name = "iscsi_iface",
293 .dev_release = iscsi_iface_release,
294 };
295
296 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
297 struct device_attribute dev_attr_##_prefix##_##_name = \
298 __ATTR(_name, _mode, _show, _store)
299
300 /* iface attrs show */
301 #define iscsi_iface_attr_show(type, name, param_type, param) \
302 static ssize_t \
303 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
304 char *buf) \
305 { \
306 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
307 struct iscsi_transport *t = iface->transport; \
308 return t->get_iface_param(iface, param_type, param, buf); \
309 } \
310
311 #define iscsi_iface_net_attr(type, name, param) \
312 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
313 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
314
315 #define iscsi_iface_attr(type, name, param) \
316 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
317 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
318
319 /* generic read only ipv4 attribute */
320 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
321 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
322 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
323 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
324 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
325 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
326 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
327 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
328 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
329 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
330 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
331 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
332 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
333 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
334 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
335 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
336 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
337 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
338 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
339 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
340 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
341 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
342 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
343 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
344 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
345 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
346 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
347 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
348 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
349
350 /* generic read only ipv6 attribute */
351 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
352 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
353 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
354 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
355 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
356 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
357 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
358 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
359 iscsi_iface_net_attr(ipv6_iface, link_local_state,
360 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
361 iscsi_iface_net_attr(ipv6_iface, router_state,
362 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
363 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
364 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
365 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
366 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
367 iscsi_iface_net_attr(ipv6_iface, traffic_class,
368 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
369 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
370 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
371 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
372 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
373 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
374 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
375 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
376 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
377 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
378 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
379 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
380
381 /* common read only iface attribute */
382 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
383 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
384 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
385 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
386 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
387 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
388 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
389 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
390 iscsi_iface_net_attr(iface, tcp_nagle_disable,
391 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
392 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
393 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
394 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
395 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
396 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
397 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
398
399 /* common iscsi specific settings attributes */
400 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
401 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
402 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
403 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
404 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
405 iscsi_iface_attr(iface, data_seq_in_order,
406 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
407 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
408 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
409 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
410 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
411 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
412 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
413 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
414 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
415 iscsi_iface_attr(iface, discovery_auth_optional,
416 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
417 iscsi_iface_attr(iface, discovery_logout,
418 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
419 iscsi_iface_attr(iface, strict_login_comp_en,
420 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
421 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
422
423 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
424 struct attribute *attr, int i)
425 {
426 struct device *dev = container_of(kobj, struct device, kobj);
427 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
428 struct iscsi_transport *t = iface->transport;
429 int param;
430 int param_type;
431
432 if (attr == &dev_attr_iface_enabled.attr)
433 param = ISCSI_NET_PARAM_IFACE_ENABLE;
434 else if (attr == &dev_attr_iface_vlan_id.attr)
435 param = ISCSI_NET_PARAM_VLAN_ID;
436 else if (attr == &dev_attr_iface_vlan_priority.attr)
437 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
438 else if (attr == &dev_attr_iface_vlan_enabled.attr)
439 param = ISCSI_NET_PARAM_VLAN_ENABLED;
440 else if (attr == &dev_attr_iface_mtu.attr)
441 param = ISCSI_NET_PARAM_MTU;
442 else if (attr == &dev_attr_iface_port.attr)
443 param = ISCSI_NET_PARAM_PORT;
444 else if (attr == &dev_attr_iface_ipaddress_state.attr)
445 param = ISCSI_NET_PARAM_IPADDR_STATE;
446 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
447 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
448 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
449 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
450 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
451 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
452 else if (attr == &dev_attr_iface_tcp_wsf.attr)
453 param = ISCSI_NET_PARAM_TCP_WSF;
454 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
455 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
456 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
457 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
458 else if (attr == &dev_attr_iface_cache_id.attr)
459 param = ISCSI_NET_PARAM_CACHE_ID;
460 else if (attr == &dev_attr_iface_redirect_en.attr)
461 param = ISCSI_NET_PARAM_REDIRECT_EN;
462 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
463 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
464 else if (attr == &dev_attr_iface_header_digest.attr)
465 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
466 else if (attr == &dev_attr_iface_data_digest.attr)
467 param = ISCSI_IFACE_PARAM_DATADGST_EN;
468 else if (attr == &dev_attr_iface_immediate_data.attr)
469 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
470 else if (attr == &dev_attr_iface_initial_r2t.attr)
471 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
472 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
473 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
474 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
475 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
476 else if (attr == &dev_attr_iface_erl.attr)
477 param = ISCSI_IFACE_PARAM_ERL;
478 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
479 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
480 else if (attr == &dev_attr_iface_first_burst_len.attr)
481 param = ISCSI_IFACE_PARAM_FIRST_BURST;
482 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
483 param = ISCSI_IFACE_PARAM_MAX_R2T;
484 else if (attr == &dev_attr_iface_max_burst_len.attr)
485 param = ISCSI_IFACE_PARAM_MAX_BURST;
486 else if (attr == &dev_attr_iface_chap_auth.attr)
487 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
488 else if (attr == &dev_attr_iface_bidi_chap.attr)
489 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
490 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
491 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
492 else if (attr == &dev_attr_iface_discovery_logout.attr)
493 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
494 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
495 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
496 else if (attr == &dev_attr_iface_initiator_name.attr)
497 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
498 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
499 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
500 param = ISCSI_NET_PARAM_IPV4_ADDR;
501 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
502 param = ISCSI_NET_PARAM_IPV4_GW;
503 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
504 param = ISCSI_NET_PARAM_IPV4_SUBNET;
505 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
506 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
507 else if (attr ==
508 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
509 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
510 else if (attr ==
511 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
512 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
513 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
514 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
515 else if (attr == &dev_attr_ipv4_iface_tos.attr)
516 param = ISCSI_NET_PARAM_IPV4_TOS;
517 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
518 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
519 else if (attr ==
520 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
521 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
522 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
523 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
524 else if (attr ==
525 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
526 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
527 else if (attr ==
528 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
529 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
530 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
531 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
532 else if (attr ==
533 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
534 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
535 else if (attr ==
536 &dev_attr_ipv4_iface_fragment_disable.attr)
537 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
538 else if (attr ==
539 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
540 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
541 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
542 param = ISCSI_NET_PARAM_IPV4_TTL;
543 else
544 return 0;
545 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
546 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
547 param = ISCSI_NET_PARAM_IPV6_ADDR;
548 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
549 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
550 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
551 param = ISCSI_NET_PARAM_IPV6_ROUTER;
552 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
553 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
554 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
555 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
556 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
557 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
558 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
559 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
560 else if (attr ==
561 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
562 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
563 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
564 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
565 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
566 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
567 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
568 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
569 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
570 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
571 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
572 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
573 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
574 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
575 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
576 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
577 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
578 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
579 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
580 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
581 else
582 return 0;
583 } else {
584 WARN_ONCE(1, "Invalid iface attr");
585 return 0;
586 }
587
588 switch (param) {
589 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
590 case ISCSI_IFACE_PARAM_HDRDGST_EN:
591 case ISCSI_IFACE_PARAM_DATADGST_EN:
592 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
593 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
594 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
595 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
596 case ISCSI_IFACE_PARAM_ERL:
597 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
598 case ISCSI_IFACE_PARAM_FIRST_BURST:
599 case ISCSI_IFACE_PARAM_MAX_R2T:
600 case ISCSI_IFACE_PARAM_MAX_BURST:
601 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
602 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
603 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
604 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
605 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
606 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
607 param_type = ISCSI_IFACE_PARAM;
608 break;
609 default:
610 param_type = ISCSI_NET_PARAM;
611 }
612
613 return t->attr_is_visible(param_type, param);
614 }
615
616 static struct attribute *iscsi_iface_attrs[] = {
617 &dev_attr_iface_enabled.attr,
618 &dev_attr_iface_vlan_id.attr,
619 &dev_attr_iface_vlan_priority.attr,
620 &dev_attr_iface_vlan_enabled.attr,
621 &dev_attr_ipv4_iface_ipaddress.attr,
622 &dev_attr_ipv4_iface_gateway.attr,
623 &dev_attr_ipv4_iface_subnet.attr,
624 &dev_attr_ipv4_iface_bootproto.attr,
625 &dev_attr_ipv6_iface_ipaddress.attr,
626 &dev_attr_ipv6_iface_link_local_addr.attr,
627 &dev_attr_ipv6_iface_router_addr.attr,
628 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
629 &dev_attr_ipv6_iface_link_local_autocfg.attr,
630 &dev_attr_iface_mtu.attr,
631 &dev_attr_iface_port.attr,
632 &dev_attr_iface_ipaddress_state.attr,
633 &dev_attr_iface_delayed_ack_en.attr,
634 &dev_attr_iface_tcp_nagle_disable.attr,
635 &dev_attr_iface_tcp_wsf_disable.attr,
636 &dev_attr_iface_tcp_wsf.attr,
637 &dev_attr_iface_tcp_timer_scale.attr,
638 &dev_attr_iface_tcp_timestamp_en.attr,
639 &dev_attr_iface_cache_id.attr,
640 &dev_attr_iface_redirect_en.attr,
641 &dev_attr_iface_def_taskmgmt_tmo.attr,
642 &dev_attr_iface_header_digest.attr,
643 &dev_attr_iface_data_digest.attr,
644 &dev_attr_iface_immediate_data.attr,
645 &dev_attr_iface_initial_r2t.attr,
646 &dev_attr_iface_data_seq_in_order.attr,
647 &dev_attr_iface_data_pdu_in_order.attr,
648 &dev_attr_iface_erl.attr,
649 &dev_attr_iface_max_recv_dlength.attr,
650 &dev_attr_iface_first_burst_len.attr,
651 &dev_attr_iface_max_outstanding_r2t.attr,
652 &dev_attr_iface_max_burst_len.attr,
653 &dev_attr_iface_chap_auth.attr,
654 &dev_attr_iface_bidi_chap.attr,
655 &dev_attr_iface_discovery_auth_optional.attr,
656 &dev_attr_iface_discovery_logout.attr,
657 &dev_attr_iface_strict_login_comp_en.attr,
658 &dev_attr_iface_initiator_name.attr,
659 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
660 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
661 &dev_attr_ipv4_iface_tos_en.attr,
662 &dev_attr_ipv4_iface_tos.attr,
663 &dev_attr_ipv4_iface_grat_arp_en.attr,
664 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
665 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
666 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
667 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
668 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
669 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
670 &dev_attr_ipv4_iface_fragment_disable.attr,
671 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
672 &dev_attr_ipv4_iface_ttl.attr,
673 &dev_attr_ipv6_iface_link_local_state.attr,
674 &dev_attr_ipv6_iface_router_state.attr,
675 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
676 &dev_attr_ipv6_iface_mld_en.attr,
677 &dev_attr_ipv6_iface_flow_label.attr,
678 &dev_attr_ipv6_iface_traffic_class.attr,
679 &dev_attr_ipv6_iface_hop_limit.attr,
680 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
681 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
682 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
683 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
684 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
685 NULL,
686 };
687
688 static struct attribute_group iscsi_iface_group = {
689 .attrs = iscsi_iface_attrs,
690 .is_visible = iscsi_iface_attr_is_visible,
691 };
692
693 /* convert iscsi_ipaddress_state values to ascii string name */
694 static const struct {
695 enum iscsi_ipaddress_state value;
696 char *name;
697 } iscsi_ipaddress_state_names[] = {
698 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
699 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
700 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
701 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
702 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
703 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
704 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
705 };
706
707 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
708 {
709 int i;
710 char *state = NULL;
711
712 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
713 if (iscsi_ipaddress_state_names[i].value == port_state) {
714 state = iscsi_ipaddress_state_names[i].name;
715 break;
716 }
717 }
718 return state;
719 }
720 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
721
722 /* convert iscsi_router_state values to ascii string name */
723 static const struct {
724 enum iscsi_router_state value;
725 char *name;
726 } iscsi_router_state_names[] = {
727 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
728 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
729 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
730 {ISCSI_ROUTER_STATE_STALE, "Stale" },
731 };
732
733 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
734 {
735 int i;
736 char *state = NULL;
737
738 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
739 if (iscsi_router_state_names[i].value == router_state) {
740 state = iscsi_router_state_names[i].name;
741 break;
742 }
743 }
744 return state;
745 }
746 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
747
748 struct iscsi_iface *
749 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
750 uint32_t iface_type, uint32_t iface_num, int dd_size)
751 {
752 struct iscsi_iface *iface;
753 int err;
754
755 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
756 if (!iface)
757 return NULL;
758
759 iface->transport = transport;
760 iface->iface_type = iface_type;
761 iface->iface_num = iface_num;
762 iface->dev.release = iscsi_iface_release;
763 iface->dev.class = &iscsi_iface_class;
764 /* parent reference released in iscsi_iface_release */
765 iface->dev.parent = get_device(&shost->shost_gendev);
766 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
767 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
768 iface_num);
769 else
770 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
771 iface_num);
772
773 err = device_register(&iface->dev);
774 if (err)
775 goto free_iface;
776
777 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
778 if (err)
779 goto unreg_iface;
780
781 if (dd_size)
782 iface->dd_data = &iface[1];
783 return iface;
784
785 unreg_iface:
786 device_unregister(&iface->dev);
787 return NULL;
788
789 free_iface:
790 put_device(iface->dev.parent);
791 kfree(iface);
792 return NULL;
793 }
794 EXPORT_SYMBOL_GPL(iscsi_create_iface);
795
796 void iscsi_destroy_iface(struct iscsi_iface *iface)
797 {
798 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
799 device_unregister(&iface->dev);
800 }
801 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
802
803 /*
804 * Interface to display flash node params to sysfs
805 */
806
807 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
808 struct device_attribute dev_attr_##_prefix##_##_name = \
809 __ATTR(_name, _mode, _show, _store)
810
811 /* flash node session attrs show */
812 #define iscsi_flashnode_sess_attr_show(type, name, param) \
813 static ssize_t \
814 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
815 char *buf) \
816 { \
817 struct iscsi_bus_flash_session *fnode_sess = \
818 iscsi_dev_to_flash_session(dev);\
819 struct iscsi_transport *t = fnode_sess->transport; \
820 return t->get_flashnode_param(fnode_sess, param, buf); \
821 } \
822
823
824 #define iscsi_flashnode_sess_attr(type, name, param) \
825 iscsi_flashnode_sess_attr_show(type, name, param) \
826 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
827 show_##type##_##name, NULL);
828
829 /* Flash node session attributes */
830
831 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
832 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
833 iscsi_flashnode_sess_attr(fnode, discovery_session,
834 ISCSI_FLASHNODE_DISCOVERY_SESS);
835 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
836 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
837 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
838 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
839 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
840 ISCSI_FLASHNODE_DATASEQ_INORDER);
841 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
842 ISCSI_FLASHNODE_PDU_INORDER);
843 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
844 iscsi_flashnode_sess_attr(fnode, discovery_logout,
845 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
846 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
847 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
848 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
849 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
850 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
851 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
852 iscsi_flashnode_sess_attr(fnode, def_time2retain,
853 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
854 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
855 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
856 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
857 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
858 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
859 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
860 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
861 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
862 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
863 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
864 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
865 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
866 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
867 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
868 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
869 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
870 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
871 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
872 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
873 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
874
875 static struct attribute *iscsi_flashnode_sess_attrs[] = {
876 &dev_attr_fnode_auto_snd_tgt_disable.attr,
877 &dev_attr_fnode_discovery_session.attr,
878 &dev_attr_fnode_portal_type.attr,
879 &dev_attr_fnode_entry_enable.attr,
880 &dev_attr_fnode_immediate_data.attr,
881 &dev_attr_fnode_initial_r2t.attr,
882 &dev_attr_fnode_data_seq_in_order.attr,
883 &dev_attr_fnode_data_pdu_in_order.attr,
884 &dev_attr_fnode_chap_auth.attr,
885 &dev_attr_fnode_discovery_logout.attr,
886 &dev_attr_fnode_bidi_chap.attr,
887 &dev_attr_fnode_discovery_auth_optional.attr,
888 &dev_attr_fnode_erl.attr,
889 &dev_attr_fnode_first_burst_len.attr,
890 &dev_attr_fnode_def_time2wait.attr,
891 &dev_attr_fnode_def_time2retain.attr,
892 &dev_attr_fnode_max_outstanding_r2t.attr,
893 &dev_attr_fnode_isid.attr,
894 &dev_attr_fnode_tsid.attr,
895 &dev_attr_fnode_max_burst_len.attr,
896 &dev_attr_fnode_def_taskmgmt_tmo.attr,
897 &dev_attr_fnode_targetalias.attr,
898 &dev_attr_fnode_targetname.attr,
899 &dev_attr_fnode_tpgt.attr,
900 &dev_attr_fnode_discovery_parent_idx.attr,
901 &dev_attr_fnode_discovery_parent_type.attr,
902 &dev_attr_fnode_chap_in_idx.attr,
903 &dev_attr_fnode_chap_out_idx.attr,
904 &dev_attr_fnode_username.attr,
905 &dev_attr_fnode_username_in.attr,
906 &dev_attr_fnode_password.attr,
907 &dev_attr_fnode_password_in.attr,
908 &dev_attr_fnode_is_boot_target.attr,
909 NULL,
910 };
911
912 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
913 struct attribute *attr,
914 int i)
915 {
916 struct device *dev = container_of(kobj, struct device, kobj);
917 struct iscsi_bus_flash_session *fnode_sess =
918 iscsi_dev_to_flash_session(dev);
919 struct iscsi_transport *t = fnode_sess->transport;
920 int param;
921
922 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
923 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
924 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
925 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
926 } else if (attr == &dev_attr_fnode_portal_type.attr) {
927 param = ISCSI_FLASHNODE_PORTAL_TYPE;
928 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
929 param = ISCSI_FLASHNODE_ENTRY_EN;
930 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
931 param = ISCSI_FLASHNODE_IMM_DATA_EN;
932 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
933 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
934 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
935 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
936 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
937 param = ISCSI_FLASHNODE_PDU_INORDER;
938 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
939 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
940 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
941 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
942 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
943 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
944 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
945 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
946 } else if (attr == &dev_attr_fnode_erl.attr) {
947 param = ISCSI_FLASHNODE_ERL;
948 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
949 param = ISCSI_FLASHNODE_FIRST_BURST;
950 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
951 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
952 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
953 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
954 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
955 param = ISCSI_FLASHNODE_MAX_R2T;
956 } else if (attr == &dev_attr_fnode_isid.attr) {
957 param = ISCSI_FLASHNODE_ISID;
958 } else if (attr == &dev_attr_fnode_tsid.attr) {
959 param = ISCSI_FLASHNODE_TSID;
960 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
961 param = ISCSI_FLASHNODE_MAX_BURST;
962 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
963 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
964 } else if (attr == &dev_attr_fnode_targetalias.attr) {
965 param = ISCSI_FLASHNODE_ALIAS;
966 } else if (attr == &dev_attr_fnode_targetname.attr) {
967 param = ISCSI_FLASHNODE_NAME;
968 } else if (attr == &dev_attr_fnode_tpgt.attr) {
969 param = ISCSI_FLASHNODE_TPGT;
970 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
971 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
972 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
973 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
974 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
975 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
976 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
977 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
978 } else if (attr == &dev_attr_fnode_username.attr) {
979 param = ISCSI_FLASHNODE_USERNAME;
980 } else if (attr == &dev_attr_fnode_username_in.attr) {
981 param = ISCSI_FLASHNODE_USERNAME_IN;
982 } else if (attr == &dev_attr_fnode_password.attr) {
983 param = ISCSI_FLASHNODE_PASSWORD;
984 } else if (attr == &dev_attr_fnode_password_in.attr) {
985 param = ISCSI_FLASHNODE_PASSWORD_IN;
986 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
987 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
988 } else {
989 WARN_ONCE(1, "Invalid flashnode session attr");
990 return 0;
991 }
992
993 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
994 }
995
996 static struct attribute_group iscsi_flashnode_sess_attr_group = {
997 .attrs = iscsi_flashnode_sess_attrs,
998 .is_visible = iscsi_flashnode_sess_attr_is_visible,
999 };
1000
1001 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1002 &iscsi_flashnode_sess_attr_group,
1003 NULL,
1004 };
1005
1006 static void iscsi_flashnode_sess_release(struct device *dev)
1007 {
1008 struct iscsi_bus_flash_session *fnode_sess =
1009 iscsi_dev_to_flash_session(dev);
1010
1011 kfree(fnode_sess->targetname);
1012 kfree(fnode_sess->targetalias);
1013 kfree(fnode_sess->portal_type);
1014 kfree(fnode_sess);
1015 }
1016
1017 static const struct device_type iscsi_flashnode_sess_dev_type = {
1018 .name = "iscsi_flashnode_sess_dev_type",
1019 .groups = iscsi_flashnode_sess_attr_groups,
1020 .release = iscsi_flashnode_sess_release,
1021 };
1022
1023 /* flash node connection attrs show */
1024 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1025 static ssize_t \
1026 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1027 char *buf) \
1028 { \
1029 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1030 struct iscsi_bus_flash_session *fnode_sess = \
1031 iscsi_flash_conn_to_flash_session(fnode_conn);\
1032 struct iscsi_transport *t = fnode_conn->transport; \
1033 return t->get_flashnode_param(fnode_sess, param, buf); \
1034 } \
1035
1036
1037 #define iscsi_flashnode_conn_attr(type, name, param) \
1038 iscsi_flashnode_conn_attr_show(type, name, param) \
1039 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1040 show_##type##_##name, NULL);
1041
1042 /* Flash node connection attributes */
1043
1044 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1045 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1046 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1047 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1048 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1049 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1050 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1051 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1052 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1053 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1054 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1055 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1056 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1057 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1058 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1059 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1060 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1061 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1062 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1063 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1064 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1065 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1066 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1067 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1068 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1069 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1070 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1071 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1072 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1073 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1074 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1075 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1076 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1077 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1078 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1079 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1080 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1081 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1082 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1083
1084 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1085 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1086 &dev_attr_fnode_header_digest.attr,
1087 &dev_attr_fnode_data_digest.attr,
1088 &dev_attr_fnode_snack_req.attr,
1089 &dev_attr_fnode_tcp_timestamp_stat.attr,
1090 &dev_attr_fnode_tcp_nagle_disable.attr,
1091 &dev_attr_fnode_tcp_wsf_disable.attr,
1092 &dev_attr_fnode_tcp_timer_scale.attr,
1093 &dev_attr_fnode_tcp_timestamp_enable.attr,
1094 &dev_attr_fnode_fragment_disable.attr,
1095 &dev_attr_fnode_max_recv_dlength.attr,
1096 &dev_attr_fnode_max_xmit_dlength.attr,
1097 &dev_attr_fnode_keepalive_tmo.attr,
1098 &dev_attr_fnode_port.attr,
1099 &dev_attr_fnode_ipaddress.attr,
1100 &dev_attr_fnode_redirect_ipaddr.attr,
1101 &dev_attr_fnode_max_segment_size.attr,
1102 &dev_attr_fnode_local_port.attr,
1103 &dev_attr_fnode_ipv4_tos.attr,
1104 &dev_attr_fnode_ipv6_traffic_class.attr,
1105 &dev_attr_fnode_ipv6_flow_label.attr,
1106 &dev_attr_fnode_link_local_ipv6.attr,
1107 &dev_attr_fnode_tcp_xmit_wsf.attr,
1108 &dev_attr_fnode_tcp_recv_wsf.attr,
1109 &dev_attr_fnode_statsn.attr,
1110 &dev_attr_fnode_exp_statsn.attr,
1111 NULL,
1112 };
1113
1114 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1115 struct attribute *attr,
1116 int i)
1117 {
1118 struct device *dev = container_of(kobj, struct device, kobj);
1119 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1120 struct iscsi_transport *t = fnode_conn->transport;
1121 int param;
1122
1123 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1124 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1125 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1126 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1127 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1128 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1129 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1130 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1131 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1132 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1133 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1134 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1135 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1136 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1137 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1138 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1139 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1140 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1141 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1142 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1143 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1144 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1145 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1146 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1147 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1148 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1149 } else if (attr == &dev_attr_fnode_port.attr) {
1150 param = ISCSI_FLASHNODE_PORT;
1151 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1152 param = ISCSI_FLASHNODE_IPADDR;
1153 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1154 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1155 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1156 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1157 } else if (attr == &dev_attr_fnode_local_port.attr) {
1158 param = ISCSI_FLASHNODE_LOCAL_PORT;
1159 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1160 param = ISCSI_FLASHNODE_IPV4_TOS;
1161 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1162 param = ISCSI_FLASHNODE_IPV6_TC;
1163 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1164 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1165 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1166 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1167 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1168 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1169 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1170 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1171 } else if (attr == &dev_attr_fnode_statsn.attr) {
1172 param = ISCSI_FLASHNODE_STATSN;
1173 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1174 param = ISCSI_FLASHNODE_EXP_STATSN;
1175 } else {
1176 WARN_ONCE(1, "Invalid flashnode connection attr");
1177 return 0;
1178 }
1179
1180 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1181 }
1182
1183 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1184 .attrs = iscsi_flashnode_conn_attrs,
1185 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1186 };
1187
1188 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1189 &iscsi_flashnode_conn_attr_group,
1190 NULL,
1191 };
1192
1193 static void iscsi_flashnode_conn_release(struct device *dev)
1194 {
1195 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1196
1197 kfree(fnode_conn->ipaddress);
1198 kfree(fnode_conn->redirect_ipaddr);
1199 kfree(fnode_conn->link_local_ipv6_addr);
1200 kfree(fnode_conn);
1201 }
1202
1203 static const struct device_type iscsi_flashnode_conn_dev_type = {
1204 .name = "iscsi_flashnode_conn_dev_type",
1205 .groups = iscsi_flashnode_conn_attr_groups,
1206 .release = iscsi_flashnode_conn_release,
1207 };
1208
1209 static struct bus_type iscsi_flashnode_bus;
1210
1211 int iscsi_flashnode_bus_match(struct device *dev,
1212 struct device_driver *drv)
1213 {
1214 if (dev->bus == &iscsi_flashnode_bus)
1215 return 1;
1216 return 0;
1217 }
1218 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1219
1220 static struct bus_type iscsi_flashnode_bus = {
1221 .name = "iscsi_flashnode",
1222 .match = &iscsi_flashnode_bus_match,
1223 };
1224
1225 /**
1226 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1227 * @shost: pointer to host data
1228 * @index: index of flashnode to add in sysfs
1229 * @transport: pointer to transport data
1230 * @dd_size: total size to allocate
1231 *
1232 * Adds a sysfs entry for the flashnode session attributes
1233 *
1234 * Returns:
1235 * pointer to allocated flashnode sess on success
1236 * %NULL on failure
1237 */
1238 struct iscsi_bus_flash_session *
1239 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1240 struct iscsi_transport *transport,
1241 int dd_size)
1242 {
1243 struct iscsi_bus_flash_session *fnode_sess;
1244 int err;
1245
1246 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1247 if (!fnode_sess)
1248 return NULL;
1249
1250 fnode_sess->transport = transport;
1251 fnode_sess->target_id = index;
1252 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1253 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1254 fnode_sess->dev.parent = &shost->shost_gendev;
1255 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1256 shost->host_no, index);
1257
1258 err = device_register(&fnode_sess->dev);
1259 if (err)
1260 goto free_fnode_sess;
1261
1262 if (dd_size)
1263 fnode_sess->dd_data = &fnode_sess[1];
1264
1265 return fnode_sess;
1266
1267 free_fnode_sess:
1268 kfree(fnode_sess);
1269 return NULL;
1270 }
1271 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1272
1273 /**
1274 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1275 * @shost: pointer to host data
1276 * @fnode_sess: pointer to the parent flashnode session entry
1277 * @transport: pointer to transport data
1278 * @dd_size: total size to allocate
1279 *
1280 * Adds a sysfs entry for the flashnode connection attributes
1281 *
1282 * Returns:
1283 * pointer to allocated flashnode conn on success
1284 * %NULL on failure
1285 */
1286 struct iscsi_bus_flash_conn *
1287 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1288 struct iscsi_bus_flash_session *fnode_sess,
1289 struct iscsi_transport *transport,
1290 int dd_size)
1291 {
1292 struct iscsi_bus_flash_conn *fnode_conn;
1293 int err;
1294
1295 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1296 if (!fnode_conn)
1297 return NULL;
1298
1299 fnode_conn->transport = transport;
1300 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1301 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1302 fnode_conn->dev.parent = &fnode_sess->dev;
1303 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1304 shost->host_no, fnode_sess->target_id);
1305
1306 err = device_register(&fnode_conn->dev);
1307 if (err)
1308 goto free_fnode_conn;
1309
1310 if (dd_size)
1311 fnode_conn->dd_data = &fnode_conn[1];
1312
1313 return fnode_conn;
1314
1315 free_fnode_conn:
1316 kfree(fnode_conn);
1317 return NULL;
1318 }
1319 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1320
1321 /**
1322 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1323 * @dev: device to verify
1324 * @data: pointer to data containing value to use for verification
1325 *
1326 * Verifies if the passed device is flashnode conn device
1327 *
1328 * Returns:
1329 * 1 on success
1330 * 0 on failure
1331 */
1332 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1333 {
1334 return dev->bus == &iscsi_flashnode_bus;
1335 }
1336
1337 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1338 {
1339 device_unregister(&fnode_conn->dev);
1340 return 0;
1341 }
1342
1343 static int flashnode_match_index(struct device *dev, void *data)
1344 {
1345 struct iscsi_bus_flash_session *fnode_sess = NULL;
1346 int ret = 0;
1347
1348 if (!iscsi_flashnode_bus_match(dev, NULL))
1349 goto exit_match_index;
1350
1351 fnode_sess = iscsi_dev_to_flash_session(dev);
1352 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1353
1354 exit_match_index:
1355 return ret;
1356 }
1357
1358 /**
1359 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1360 * @shost: pointer to host data
1361 * @idx: index to match
1362 *
1363 * Finds the flashnode session object for the passed index
1364 *
1365 * Returns:
1366 * pointer to found flashnode session object on success
1367 * %NULL on failure
1368 */
1369 static struct iscsi_bus_flash_session *
1370 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1371 {
1372 struct iscsi_bus_flash_session *fnode_sess = NULL;
1373 struct device *dev;
1374
1375 dev = device_find_child(&shost->shost_gendev, &idx,
1376 flashnode_match_index);
1377 if (dev)
1378 fnode_sess = iscsi_dev_to_flash_session(dev);
1379
1380 return fnode_sess;
1381 }
1382
1383 /**
1384 * iscsi_find_flashnode_sess - finds flashnode session entry
1385 * @shost: pointer to host data
1386 * @data: pointer to data containing value to use for comparison
1387 * @fn: function pointer that does actual comparison
1388 *
1389 * Finds the flashnode session object comparing the data passed using logic
1390 * defined in passed function pointer
1391 *
1392 * Returns:
1393 * pointer to found flashnode session device object on success
1394 * %NULL on failure
1395 */
1396 struct device *
1397 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1398 int (*fn)(struct device *dev, void *data))
1399 {
1400 return device_find_child(&shost->shost_gendev, data, fn);
1401 }
1402 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1403
1404 /**
1405 * iscsi_find_flashnode_conn - finds flashnode connection entry
1406 * @fnode_sess: pointer to parent flashnode session entry
1407 *
1408 * Finds the flashnode connection object comparing the data passed using logic
1409 * defined in passed function pointer
1410 *
1411 * Returns:
1412 * pointer to found flashnode connection device object on success
1413 * %NULL on failure
1414 */
1415 struct device *
1416 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1417 {
1418 return device_find_child(&fnode_sess->dev, NULL,
1419 iscsi_is_flashnode_conn_dev);
1420 }
1421 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1422
1423 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1424 {
1425 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1426 return 0;
1427
1428 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1429 }
1430
1431 /**
1432 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1433 * @fnode_sess: pointer to flashnode session entry to be destroyed
1434 *
1435 * Deletes the flashnode session entry and all children flashnode connection
1436 * entries from sysfs
1437 */
1438 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1439 {
1440 int err;
1441
1442 err = device_for_each_child(&fnode_sess->dev, NULL,
1443 iscsi_iter_destroy_flashnode_conn_fn);
1444 if (err)
1445 pr_err("Could not delete all connections for %s. Error %d.\n",
1446 fnode_sess->dev.kobj.name, err);
1447
1448 device_unregister(&fnode_sess->dev);
1449 }
1450 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1451
1452 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1453 {
1454 if (!iscsi_flashnode_bus_match(dev, NULL))
1455 return 0;
1456
1457 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1458 return 0;
1459 }
1460
1461 /**
1462 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1463 * @shost: pointer to host data
1464 *
1465 * Destroys all the flashnode session entries and all corresponding children
1466 * flashnode connection entries from sysfs
1467 */
1468 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1469 {
1470 device_for_each_child(&shost->shost_gendev, NULL,
1471 iscsi_iter_destroy_flashnode_fn);
1472 }
1473 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1474
1475 /*
1476 * BSG support
1477 */
1478 /**
1479 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1480 * @job: bsg job to be processed
1481 */
1482 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1483 {
1484 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1485 struct iscsi_bsg_request *req = job->request;
1486 struct iscsi_bsg_reply *reply = job->reply;
1487 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1488 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1489 int ret;
1490
1491 /* check if we have the msgcode value at least */
1492 if (job->request_len < sizeof(uint32_t)) {
1493 ret = -ENOMSG;
1494 goto fail_host_msg;
1495 }
1496
1497 /* Validate the host command */
1498 switch (req->msgcode) {
1499 case ISCSI_BSG_HST_VENDOR:
1500 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1501 if ((shost->hostt->vendor_id == 0L) ||
1502 (req->rqst_data.h_vendor.vendor_id !=
1503 shost->hostt->vendor_id)) {
1504 ret = -ESRCH;
1505 goto fail_host_msg;
1506 }
1507 break;
1508 default:
1509 ret = -EBADR;
1510 goto fail_host_msg;
1511 }
1512
1513 /* check if we really have all the request data needed */
1514 if (job->request_len < cmdlen) {
1515 ret = -ENOMSG;
1516 goto fail_host_msg;
1517 }
1518
1519 ret = i->iscsi_transport->bsg_request(job);
1520 if (!ret)
1521 return 0;
1522
1523 fail_host_msg:
1524 /* return the errno failure code as the only status */
1525 BUG_ON(job->reply_len < sizeof(uint32_t));
1526 reply->reply_payload_rcv_len = 0;
1527 reply->result = ret;
1528 job->reply_len = sizeof(uint32_t);
1529 bsg_job_done(job, ret, 0);
1530 return 0;
1531 }
1532
1533 /**
1534 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1535 * @shost: shost for iscsi_host
1536 * @ihost: iscsi_cls_host adding the structures to
1537 */
1538 static int
1539 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1540 {
1541 struct device *dev = &shost->shost_gendev;
1542 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1543 struct request_queue *q;
1544 char bsg_name[20];
1545
1546 if (!i->iscsi_transport->bsg_request)
1547 return -ENOTSUPP;
1548
1549 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1550 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1551 if (IS_ERR(q)) {
1552 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1553 "initialize - no request queue\n");
1554 return PTR_ERR(q);
1555 }
1556 __scsi_init_queue(shost, q);
1557
1558 ihost->bsg_q = q;
1559 return 0;
1560 }
1561
1562 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1563 struct device *cdev)
1564 {
1565 struct Scsi_Host *shost = dev_to_shost(dev);
1566 struct iscsi_cls_host *ihost = shost->shost_data;
1567
1568 memset(ihost, 0, sizeof(*ihost));
1569 atomic_set(&ihost->nr_scans, 0);
1570 mutex_init(&ihost->mutex);
1571
1572 iscsi_bsg_host_add(shost, ihost);
1573 /* ignore any bsg add error - we just can't do sgio */
1574
1575 return 0;
1576 }
1577
1578 static int iscsi_remove_host(struct transport_container *tc,
1579 struct device *dev, struct device *cdev)
1580 {
1581 struct Scsi_Host *shost = dev_to_shost(dev);
1582 struct iscsi_cls_host *ihost = shost->shost_data;
1583
1584 bsg_remove_queue(ihost->bsg_q);
1585 return 0;
1586 }
1587
1588 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1589 "iscsi_host",
1590 iscsi_setup_host,
1591 iscsi_remove_host,
1592 NULL);
1593
1594 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1595 "iscsi_session",
1596 NULL,
1597 NULL,
1598 NULL);
1599
1600 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1601 "iscsi_connection",
1602 NULL,
1603 NULL,
1604 NULL);
1605
1606 static struct sock *nls;
1607 static DEFINE_MUTEX(rx_queue_mutex);
1608
1609 static LIST_HEAD(sesslist);
1610 static DEFINE_SPINLOCK(sesslock);
1611 static LIST_HEAD(connlist);
1612 static DEFINE_SPINLOCK(connlock);
1613
1614 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1615 {
1616 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1617 return sess->sid;
1618 }
1619
1620 /*
1621 * Returns the matching session to a given sid
1622 */
1623 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1624 {
1625 unsigned long flags;
1626 struct iscsi_cls_session *sess;
1627
1628 spin_lock_irqsave(&sesslock, flags);
1629 list_for_each_entry(sess, &sesslist, sess_list) {
1630 if (sess->sid == sid) {
1631 spin_unlock_irqrestore(&sesslock, flags);
1632 return sess;
1633 }
1634 }
1635 spin_unlock_irqrestore(&sesslock, flags);
1636 return NULL;
1637 }
1638
1639 /*
1640 * Returns the matching connection to a given sid / cid tuple
1641 */
1642 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1643 {
1644 unsigned long flags;
1645 struct iscsi_cls_conn *conn;
1646
1647 spin_lock_irqsave(&connlock, flags);
1648 list_for_each_entry(conn, &connlist, conn_list) {
1649 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1650 spin_unlock_irqrestore(&connlock, flags);
1651 return conn;
1652 }
1653 }
1654 spin_unlock_irqrestore(&connlock, flags);
1655 return NULL;
1656 }
1657
1658 /*
1659 * The following functions can be used by LLDs that allocate
1660 * their own scsi_hosts or by software iscsi LLDs
1661 */
1662 static struct {
1663 int value;
1664 char *name;
1665 } iscsi_session_state_names[] = {
1666 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1667 { ISCSI_SESSION_FAILED, "FAILED" },
1668 { ISCSI_SESSION_FREE, "FREE" },
1669 };
1670
1671 static const char *iscsi_session_state_name(int state)
1672 {
1673 int i;
1674 char *name = NULL;
1675
1676 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1677 if (iscsi_session_state_names[i].value == state) {
1678 name = iscsi_session_state_names[i].name;
1679 break;
1680 }
1681 }
1682 return name;
1683 }
1684
1685 int iscsi_session_chkready(struct iscsi_cls_session *session)
1686 {
1687 unsigned long flags;
1688 int err;
1689
1690 spin_lock_irqsave(&session->lock, flags);
1691 switch (session->state) {
1692 case ISCSI_SESSION_LOGGED_IN:
1693 err = 0;
1694 break;
1695 case ISCSI_SESSION_FAILED:
1696 err = DID_IMM_RETRY << 16;
1697 break;
1698 case ISCSI_SESSION_FREE:
1699 err = DID_TRANSPORT_FAILFAST << 16;
1700 break;
1701 default:
1702 err = DID_NO_CONNECT << 16;
1703 break;
1704 }
1705 spin_unlock_irqrestore(&session->lock, flags);
1706 return err;
1707 }
1708 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1709
1710 int iscsi_is_session_online(struct iscsi_cls_session *session)
1711 {
1712 unsigned long flags;
1713 int ret = 0;
1714
1715 spin_lock_irqsave(&session->lock, flags);
1716 if (session->state == ISCSI_SESSION_LOGGED_IN)
1717 ret = 1;
1718 spin_unlock_irqrestore(&session->lock, flags);
1719 return ret;
1720 }
1721 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1722
1723 static void iscsi_session_release(struct device *dev)
1724 {
1725 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1726 struct Scsi_Host *shost;
1727
1728 shost = iscsi_session_to_shost(session);
1729 scsi_host_put(shost);
1730 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1731 kfree(session);
1732 }
1733
1734 int iscsi_is_session_dev(const struct device *dev)
1735 {
1736 return dev->release == iscsi_session_release;
1737 }
1738 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1739
1740 static int iscsi_iter_session_fn(struct device *dev, void *data)
1741 {
1742 void (* fn) (struct iscsi_cls_session *) = data;
1743
1744 if (!iscsi_is_session_dev(dev))
1745 return 0;
1746 fn(iscsi_dev_to_session(dev));
1747 return 0;
1748 }
1749
1750 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1751 void (*fn)(struct iscsi_cls_session *))
1752 {
1753 device_for_each_child(&shost->shost_gendev, fn,
1754 iscsi_iter_session_fn);
1755 }
1756 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1757
1758 /**
1759 * iscsi_scan_finished - helper to report when running scans are done
1760 * @shost: scsi host
1761 * @time: scan run time
1762 *
1763 * This function can be used by drives like qla4xxx to report to the scsi
1764 * layer when the scans it kicked off at module load time are done.
1765 */
1766 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1767 {
1768 struct iscsi_cls_host *ihost = shost->shost_data;
1769 /*
1770 * qla4xxx will have kicked off some session unblocks before calling
1771 * scsi_scan_host, so just wait for them to complete.
1772 */
1773 return !atomic_read(&ihost->nr_scans);
1774 }
1775 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1776
1777 struct iscsi_scan_data {
1778 unsigned int channel;
1779 unsigned int id;
1780 u64 lun;
1781 enum scsi_scan_mode rescan;
1782 };
1783
1784 static int iscsi_user_scan_session(struct device *dev, void *data)
1785 {
1786 struct iscsi_scan_data *scan_data = data;
1787 struct iscsi_cls_session *session;
1788 struct Scsi_Host *shost;
1789 struct iscsi_cls_host *ihost;
1790 unsigned long flags;
1791 unsigned int id;
1792
1793 if (!iscsi_is_session_dev(dev))
1794 return 0;
1795
1796 session = iscsi_dev_to_session(dev);
1797
1798 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1799
1800 shost = iscsi_session_to_shost(session);
1801 ihost = shost->shost_data;
1802
1803 mutex_lock(&ihost->mutex);
1804 spin_lock_irqsave(&session->lock, flags);
1805 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1806 spin_unlock_irqrestore(&session->lock, flags);
1807 goto user_scan_exit;
1808 }
1809 id = session->target_id;
1810 spin_unlock_irqrestore(&session->lock, flags);
1811
1812 if (id != ISCSI_MAX_TARGET) {
1813 if ((scan_data->channel == SCAN_WILD_CARD ||
1814 scan_data->channel == 0) &&
1815 (scan_data->id == SCAN_WILD_CARD ||
1816 scan_data->id == id))
1817 scsi_scan_target(&session->dev, 0, id,
1818 scan_data->lun, scan_data->rescan);
1819 }
1820
1821 user_scan_exit:
1822 mutex_unlock(&ihost->mutex);
1823 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1824 return 0;
1825 }
1826
1827 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1828 uint id, u64 lun)
1829 {
1830 struct iscsi_scan_data scan_data;
1831
1832 scan_data.channel = channel;
1833 scan_data.id = id;
1834 scan_data.lun = lun;
1835 scan_data.rescan = SCSI_SCAN_MANUAL;
1836
1837 return device_for_each_child(&shost->shost_gendev, &scan_data,
1838 iscsi_user_scan_session);
1839 }
1840
1841 static void iscsi_scan_session(struct work_struct *work)
1842 {
1843 struct iscsi_cls_session *session =
1844 container_of(work, struct iscsi_cls_session, scan_work);
1845 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1846 struct iscsi_cls_host *ihost = shost->shost_data;
1847 struct iscsi_scan_data scan_data;
1848
1849 scan_data.channel = 0;
1850 scan_data.id = SCAN_WILD_CARD;
1851 scan_data.lun = SCAN_WILD_CARD;
1852 scan_data.rescan = SCSI_SCAN_RESCAN;
1853
1854 iscsi_user_scan_session(&session->dev, &scan_data);
1855 atomic_dec(&ihost->nr_scans);
1856 }
1857
1858 /**
1859 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1860 * @cmd: scsi cmd passed to scsi eh handler
1861 *
1862 * If the session is down this function will wait for the recovery
1863 * timer to fire or for the session to be logged back in. If the
1864 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1865 * should pass this error value to the scsi eh.
1866 */
1867 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1868 {
1869 struct iscsi_cls_session *session =
1870 starget_to_session(scsi_target(cmd->device));
1871 unsigned long flags;
1872 int ret = 0;
1873
1874 spin_lock_irqsave(&session->lock, flags);
1875 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1876 if (session->state == ISCSI_SESSION_FREE) {
1877 ret = FAST_IO_FAIL;
1878 break;
1879 }
1880 spin_unlock_irqrestore(&session->lock, flags);
1881 msleep(1000);
1882 spin_lock_irqsave(&session->lock, flags);
1883 }
1884 spin_unlock_irqrestore(&session->lock, flags);
1885 return ret;
1886 }
1887 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1888
1889 static void session_recovery_timedout(struct work_struct *work)
1890 {
1891 struct iscsi_cls_session *session =
1892 container_of(work, struct iscsi_cls_session,
1893 recovery_work.work);
1894 unsigned long flags;
1895
1896 iscsi_cls_session_printk(KERN_INFO, session,
1897 "session recovery timed out after %d secs\n",
1898 session->recovery_tmo);
1899
1900 spin_lock_irqsave(&session->lock, flags);
1901 switch (session->state) {
1902 case ISCSI_SESSION_FAILED:
1903 session->state = ISCSI_SESSION_FREE;
1904 break;
1905 case ISCSI_SESSION_LOGGED_IN:
1906 case ISCSI_SESSION_FREE:
1907 /* we raced with the unblock's flush */
1908 spin_unlock_irqrestore(&session->lock, flags);
1909 return;
1910 }
1911 spin_unlock_irqrestore(&session->lock, flags);
1912
1913 if (session->transport->session_recovery_timedout)
1914 session->transport->session_recovery_timedout(session);
1915
1916 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1917 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1918 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1919 }
1920
1921 static void __iscsi_unblock_session(struct work_struct *work)
1922 {
1923 struct iscsi_cls_session *session =
1924 container_of(work, struct iscsi_cls_session,
1925 unblock_work);
1926 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1927 struct iscsi_cls_host *ihost = shost->shost_data;
1928 unsigned long flags;
1929
1930 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1931 /*
1932 * The recovery and unblock work get run from the same workqueue,
1933 * so try to cancel it if it was going to run after this unblock.
1934 */
1935 cancel_delayed_work(&session->recovery_work);
1936 spin_lock_irqsave(&session->lock, flags);
1937 session->state = ISCSI_SESSION_LOGGED_IN;
1938 spin_unlock_irqrestore(&session->lock, flags);
1939 /* start IO */
1940 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1941 /*
1942 * Only do kernel scanning if the driver is properly hooked into
1943 * the async scanning code (drivers like iscsi_tcp do login and
1944 * scanning from userspace).
1945 */
1946 if (shost->hostt->scan_finished) {
1947 if (scsi_queue_work(shost, &session->scan_work))
1948 atomic_inc(&ihost->nr_scans);
1949 }
1950 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1951 }
1952
1953 /**
1954 * iscsi_unblock_session - set a session as logged in and start IO.
1955 * @session: iscsi session
1956 *
1957 * Mark a session as ready to accept IO.
1958 */
1959 void iscsi_unblock_session(struct iscsi_cls_session *session)
1960 {
1961 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1962 /*
1963 * make sure all the events have completed before tell the driver
1964 * it is safe
1965 */
1966 flush_workqueue(iscsi_eh_timer_workq);
1967 }
1968 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1969
1970 static void __iscsi_block_session(struct work_struct *work)
1971 {
1972 struct iscsi_cls_session *session =
1973 container_of(work, struct iscsi_cls_session,
1974 block_work);
1975 unsigned long flags;
1976
1977 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1978 spin_lock_irqsave(&session->lock, flags);
1979 session->state = ISCSI_SESSION_FAILED;
1980 spin_unlock_irqrestore(&session->lock, flags);
1981 scsi_target_block(&session->dev);
1982 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1983 if (session->recovery_tmo >= 0)
1984 queue_delayed_work(iscsi_eh_timer_workq,
1985 &session->recovery_work,
1986 session->recovery_tmo * HZ);
1987 }
1988
1989 void iscsi_block_session(struct iscsi_cls_session *session)
1990 {
1991 queue_work(iscsi_eh_timer_workq, &session->block_work);
1992 }
1993 EXPORT_SYMBOL_GPL(iscsi_block_session);
1994
1995 static void __iscsi_unbind_session(struct work_struct *work)
1996 {
1997 struct iscsi_cls_session *session =
1998 container_of(work, struct iscsi_cls_session,
1999 unbind_work);
2000 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2001 struct iscsi_cls_host *ihost = shost->shost_data;
2002 unsigned long flags;
2003 unsigned int target_id;
2004
2005 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2006
2007 /* Prevent new scans and make sure scanning is not in progress */
2008 mutex_lock(&ihost->mutex);
2009 spin_lock_irqsave(&session->lock, flags);
2010 if (session->target_id == ISCSI_MAX_TARGET) {
2011 spin_unlock_irqrestore(&session->lock, flags);
2012 mutex_unlock(&ihost->mutex);
2013 return;
2014 }
2015
2016 target_id = session->target_id;
2017 session->target_id = ISCSI_MAX_TARGET;
2018 spin_unlock_irqrestore(&session->lock, flags);
2019 mutex_unlock(&ihost->mutex);
2020
2021 if (session->ida_used)
2022 ida_simple_remove(&iscsi_sess_ida, target_id);
2023
2024 scsi_remove_target(&session->dev);
2025 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2026 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2027 }
2028
2029 struct iscsi_cls_session *
2030 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2031 int dd_size)
2032 {
2033 struct iscsi_cls_session *session;
2034
2035 session = kzalloc(sizeof(*session) + dd_size,
2036 GFP_KERNEL);
2037 if (!session)
2038 return NULL;
2039
2040 session->transport = transport;
2041 session->creator = -1;
2042 session->recovery_tmo = 120;
2043 session->recovery_tmo_sysfs_override = false;
2044 session->state = ISCSI_SESSION_FREE;
2045 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2046 INIT_LIST_HEAD(&session->sess_list);
2047 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2048 INIT_WORK(&session->block_work, __iscsi_block_session);
2049 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2050 INIT_WORK(&session->scan_work, iscsi_scan_session);
2051 spin_lock_init(&session->lock);
2052
2053 /* this is released in the dev's release function */
2054 scsi_host_get(shost);
2055 session->dev.parent = &shost->shost_gendev;
2056 session->dev.release = iscsi_session_release;
2057 device_initialize(&session->dev);
2058 if (dd_size)
2059 session->dd_data = &session[1];
2060
2061 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2062 return session;
2063 }
2064 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2065
2066 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2067 {
2068 unsigned long flags;
2069 int id = 0;
2070 int err;
2071
2072 session->sid = atomic_add_return(1, &iscsi_session_nr);
2073
2074 if (target_id == ISCSI_MAX_TARGET) {
2075 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2076
2077 if (id < 0) {
2078 iscsi_cls_session_printk(KERN_ERR, session,
2079 "Failure in Target ID Allocation\n");
2080 return id;
2081 }
2082 session->target_id = (unsigned int)id;
2083 session->ida_used = true;
2084 } else
2085 session->target_id = target_id;
2086
2087 dev_set_name(&session->dev, "session%u", session->sid);
2088 err = device_add(&session->dev);
2089 if (err) {
2090 iscsi_cls_session_printk(KERN_ERR, session,
2091 "could not register session's dev\n");
2092 goto release_ida;
2093 }
2094 transport_register_device(&session->dev);
2095
2096 spin_lock_irqsave(&sesslock, flags);
2097 list_add(&session->sess_list, &sesslist);
2098 spin_unlock_irqrestore(&sesslock, flags);
2099
2100 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2101 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2102 return 0;
2103
2104 release_ida:
2105 if (session->ida_used)
2106 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2107
2108 return err;
2109 }
2110 EXPORT_SYMBOL_GPL(iscsi_add_session);
2111
2112 /**
2113 * iscsi_create_session - create iscsi class session
2114 * @shost: scsi host
2115 * @transport: iscsi transport
2116 * @dd_size: private driver data size
2117 * @target_id: which target
2118 *
2119 * This can be called from a LLD or iscsi_transport.
2120 */
2121 struct iscsi_cls_session *
2122 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2123 int dd_size, unsigned int target_id)
2124 {
2125 struct iscsi_cls_session *session;
2126
2127 session = iscsi_alloc_session(shost, transport, dd_size);
2128 if (!session)
2129 return NULL;
2130
2131 if (iscsi_add_session(session, target_id)) {
2132 iscsi_free_session(session);
2133 return NULL;
2134 }
2135 return session;
2136 }
2137 EXPORT_SYMBOL_GPL(iscsi_create_session);
2138
2139 static void iscsi_conn_release(struct device *dev)
2140 {
2141 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2142 struct device *parent = conn->dev.parent;
2143
2144 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2145 kfree(conn);
2146 put_device(parent);
2147 }
2148
2149 static int iscsi_is_conn_dev(const struct device *dev)
2150 {
2151 return dev->release == iscsi_conn_release;
2152 }
2153
2154 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2155 {
2156 if (!iscsi_is_conn_dev(dev))
2157 return 0;
2158 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2159 }
2160
2161 void iscsi_remove_session(struct iscsi_cls_session *session)
2162 {
2163 unsigned long flags;
2164 int err;
2165
2166 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2167
2168 spin_lock_irqsave(&sesslock, flags);
2169 list_del(&session->sess_list);
2170 spin_unlock_irqrestore(&sesslock, flags);
2171
2172 /* make sure there are no blocks/unblocks queued */
2173 flush_workqueue(iscsi_eh_timer_workq);
2174 /* make sure the timedout callout is not running */
2175 if (!cancel_delayed_work(&session->recovery_work))
2176 flush_workqueue(iscsi_eh_timer_workq);
2177 /*
2178 * If we are blocked let commands flow again. The lld or iscsi
2179 * layer should set up the queuecommand to fail commands.
2180 * We assume that LLD will not be calling block/unblock while
2181 * removing the session.
2182 */
2183 spin_lock_irqsave(&session->lock, flags);
2184 session->state = ISCSI_SESSION_FREE;
2185 spin_unlock_irqrestore(&session->lock, flags);
2186
2187 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2188 /* flush running scans then delete devices */
2189 flush_work(&session->scan_work);
2190 /* flush running unbind operations */
2191 flush_work(&session->unbind_work);
2192 __iscsi_unbind_session(&session->unbind_work);
2193
2194 /* hw iscsi may not have removed all connections from session */
2195 err = device_for_each_child(&session->dev, NULL,
2196 iscsi_iter_destroy_conn_fn);
2197 if (err)
2198 iscsi_cls_session_printk(KERN_ERR, session,
2199 "Could not delete all connections "
2200 "for session. Error %d.\n", err);
2201
2202 transport_unregister_device(&session->dev);
2203
2204 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2205 device_del(&session->dev);
2206 }
2207 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2208
2209 void iscsi_free_session(struct iscsi_cls_session *session)
2210 {
2211 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2212 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2213 put_device(&session->dev);
2214 }
2215 EXPORT_SYMBOL_GPL(iscsi_free_session);
2216
2217 /**
2218 * iscsi_create_conn - create iscsi class connection
2219 * @session: iscsi cls session
2220 * @dd_size: private driver data size
2221 * @cid: connection id
2222 *
2223 * This can be called from a LLD or iscsi_transport. The connection
2224 * is child of the session so cid must be unique for all connections
2225 * on the session.
2226 *
2227 * Since we do not support MCS, cid will normally be zero. In some cases
2228 * for software iscsi we could be trying to preallocate a connection struct
2229 * in which case there could be two connection structs and cid would be
2230 * non-zero.
2231 */
2232 struct iscsi_cls_conn *
2233 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2234 {
2235 struct iscsi_transport *transport = session->transport;
2236 struct iscsi_cls_conn *conn;
2237 unsigned long flags;
2238 int err;
2239
2240 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2241 if (!conn)
2242 return NULL;
2243 if (dd_size)
2244 conn->dd_data = &conn[1];
2245
2246 mutex_init(&conn->ep_mutex);
2247 INIT_LIST_HEAD(&conn->conn_list);
2248 conn->transport = transport;
2249 conn->cid = cid;
2250
2251 /* this is released in the dev's release function */
2252 if (!get_device(&session->dev))
2253 goto free_conn;
2254
2255 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2256 conn->dev.parent = &session->dev;
2257 conn->dev.release = iscsi_conn_release;
2258 err = device_register(&conn->dev);
2259 if (err) {
2260 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2261 "register connection's dev\n");
2262 goto release_parent_ref;
2263 }
2264 transport_register_device(&conn->dev);
2265
2266 spin_lock_irqsave(&connlock, flags);
2267 list_add(&conn->conn_list, &connlist);
2268 spin_unlock_irqrestore(&connlock, flags);
2269
2270 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2271 return conn;
2272
2273 release_parent_ref:
2274 put_device(&session->dev);
2275 free_conn:
2276 kfree(conn);
2277 return NULL;
2278 }
2279
2280 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2281
2282 /**
2283 * iscsi_destroy_conn - destroy iscsi class connection
2284 * @conn: iscsi cls session
2285 *
2286 * This can be called from a LLD or iscsi_transport.
2287 */
2288 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2289 {
2290 unsigned long flags;
2291
2292 spin_lock_irqsave(&connlock, flags);
2293 list_del(&conn->conn_list);
2294 spin_unlock_irqrestore(&connlock, flags);
2295
2296 transport_unregister_device(&conn->dev);
2297 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2298 device_unregister(&conn->dev);
2299 return 0;
2300 }
2301 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2302
2303 /*
2304 * iscsi interface functions
2305 */
2306 static struct iscsi_internal *
2307 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2308 {
2309 struct iscsi_internal *priv;
2310 unsigned long flags;
2311
2312 spin_lock_irqsave(&iscsi_transport_lock, flags);
2313 list_for_each_entry(priv, &iscsi_transports, list) {
2314 if (tt == priv->iscsi_transport) {
2315 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2316 return priv;
2317 }
2318 }
2319 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2320 return NULL;
2321 }
2322
2323 static int
2324 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2325 {
2326 return nlmsg_multicast(nls, skb, 0, group, gfp);
2327 }
2328
2329 static int
2330 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2331 {
2332 return nlmsg_unicast(nls, skb, portid);
2333 }
2334
2335 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2336 char *data, uint32_t data_size)
2337 {
2338 struct nlmsghdr *nlh;
2339 struct sk_buff *skb;
2340 struct iscsi_uevent *ev;
2341 char *pdu;
2342 struct iscsi_internal *priv;
2343 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2344 data_size);
2345
2346 priv = iscsi_if_transport_lookup(conn->transport);
2347 if (!priv)
2348 return -EINVAL;
2349
2350 skb = alloc_skb(len, GFP_ATOMIC);
2351 if (!skb) {
2352 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2353 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2354 "control PDU: OOM\n");
2355 return -ENOMEM;
2356 }
2357
2358 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2359 ev = nlmsg_data(nlh);
2360 memset(ev, 0, sizeof(*ev));
2361 ev->transport_handle = iscsi_handle(conn->transport);
2362 ev->type = ISCSI_KEVENT_RECV_PDU;
2363 ev->r.recv_req.cid = conn->cid;
2364 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2365 pdu = (char*)ev + sizeof(*ev);
2366 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2367 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2368
2369 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2370 }
2371 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2372
2373 int iscsi_offload_mesg(struct Scsi_Host *shost,
2374 struct iscsi_transport *transport, uint32_t type,
2375 char *data, uint16_t data_size)
2376 {
2377 struct nlmsghdr *nlh;
2378 struct sk_buff *skb;
2379 struct iscsi_uevent *ev;
2380 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2381
2382 skb = alloc_skb(len, GFP_ATOMIC);
2383 if (!skb) {
2384 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2385 return -ENOMEM;
2386 }
2387
2388 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2389 ev = nlmsg_data(nlh);
2390 memset(ev, 0, sizeof(*ev));
2391 ev->type = type;
2392 ev->transport_handle = iscsi_handle(transport);
2393 switch (type) {
2394 case ISCSI_KEVENT_PATH_REQ:
2395 ev->r.req_path.host_no = shost->host_no;
2396 break;
2397 case ISCSI_KEVENT_IF_DOWN:
2398 ev->r.notify_if_down.host_no = shost->host_no;
2399 break;
2400 }
2401
2402 memcpy((char *)ev + sizeof(*ev), data, data_size);
2403
2404 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2405 }
2406 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2407
2408 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2409 {
2410 struct nlmsghdr *nlh;
2411 struct sk_buff *skb;
2412 struct iscsi_uevent *ev;
2413 struct iscsi_internal *priv;
2414 int len = nlmsg_total_size(sizeof(*ev));
2415
2416 priv = iscsi_if_transport_lookup(conn->transport);
2417 if (!priv)
2418 return;
2419
2420 skb = alloc_skb(len, GFP_ATOMIC);
2421 if (!skb) {
2422 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2423 "conn error (%d)\n", error);
2424 return;
2425 }
2426
2427 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2428 ev = nlmsg_data(nlh);
2429 ev->transport_handle = iscsi_handle(conn->transport);
2430 ev->type = ISCSI_KEVENT_CONN_ERROR;
2431 ev->r.connerror.error = error;
2432 ev->r.connerror.cid = conn->cid;
2433 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2434
2435 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2436
2437 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2438 error);
2439 }
2440 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2441
2442 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2443 enum iscsi_conn_state state)
2444 {
2445 struct nlmsghdr *nlh;
2446 struct sk_buff *skb;
2447 struct iscsi_uevent *ev;
2448 struct iscsi_internal *priv;
2449 int len = nlmsg_total_size(sizeof(*ev));
2450
2451 priv = iscsi_if_transport_lookup(conn->transport);
2452 if (!priv)
2453 return;
2454
2455 skb = alloc_skb(len, GFP_ATOMIC);
2456 if (!skb) {
2457 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2458 "conn login (%d)\n", state);
2459 return;
2460 }
2461
2462 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2463 ev = nlmsg_data(nlh);
2464 ev->transport_handle = iscsi_handle(conn->transport);
2465 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2466 ev->r.conn_login.state = state;
2467 ev->r.conn_login.cid = conn->cid;
2468 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2469 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2470
2471 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2472 state);
2473 }
2474 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2475
2476 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2477 enum iscsi_host_event_code code, uint32_t data_size,
2478 uint8_t *data)
2479 {
2480 struct nlmsghdr *nlh;
2481 struct sk_buff *skb;
2482 struct iscsi_uevent *ev;
2483 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2484
2485 skb = alloc_skb(len, GFP_NOIO);
2486 if (!skb) {
2487 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2488 host_no, code);
2489 return;
2490 }
2491
2492 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2493 ev = nlmsg_data(nlh);
2494 ev->transport_handle = iscsi_handle(transport);
2495 ev->type = ISCSI_KEVENT_HOST_EVENT;
2496 ev->r.host_event.host_no = host_no;
2497 ev->r.host_event.code = code;
2498 ev->r.host_event.data_size = data_size;
2499
2500 if (data_size)
2501 memcpy((char *)ev + sizeof(*ev), data, data_size);
2502
2503 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2504 }
2505 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2506
2507 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2508 uint32_t status, uint32_t pid, uint32_t data_size,
2509 uint8_t *data)
2510 {
2511 struct nlmsghdr *nlh;
2512 struct sk_buff *skb;
2513 struct iscsi_uevent *ev;
2514 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2515
2516 skb = alloc_skb(len, GFP_NOIO);
2517 if (!skb) {
2518 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2519 return;
2520 }
2521
2522 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2523 ev = nlmsg_data(nlh);
2524 ev->transport_handle = iscsi_handle(transport);
2525 ev->type = ISCSI_KEVENT_PING_COMP;
2526 ev->r.ping_comp.host_no = host_no;
2527 ev->r.ping_comp.status = status;
2528 ev->r.ping_comp.pid = pid;
2529 ev->r.ping_comp.data_size = data_size;
2530 memcpy((char *)ev + sizeof(*ev), data, data_size);
2531
2532 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2533 }
2534 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2535
2536 static int
2537 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2538 {
2539 struct sk_buff *skb;
2540 struct nlmsghdr *nlh;
2541 int len = nlmsg_total_size(size);
2542
2543 skb = alloc_skb(len, GFP_ATOMIC);
2544 if (!skb) {
2545 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2546 return -ENOMEM;
2547 }
2548
2549 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2550 memcpy(nlmsg_data(nlh), payload, size);
2551 return iscsi_unicast_skb(skb, portid);
2552 }
2553
2554 static int
2555 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2556 {
2557 struct iscsi_uevent *ev = nlmsg_data(nlh);
2558 struct iscsi_stats *stats;
2559 struct sk_buff *skbstat;
2560 struct iscsi_cls_conn *conn;
2561 struct nlmsghdr *nlhstat;
2562 struct iscsi_uevent *evstat;
2563 struct iscsi_internal *priv;
2564 int len = nlmsg_total_size(sizeof(*ev) +
2565 sizeof(struct iscsi_stats) +
2566 sizeof(struct iscsi_stats_custom) *
2567 ISCSI_STATS_CUSTOM_MAX);
2568 int err = 0;
2569
2570 priv = iscsi_if_transport_lookup(transport);
2571 if (!priv)
2572 return -EINVAL;
2573
2574 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2575 if (!conn)
2576 return -EEXIST;
2577
2578 do {
2579 int actual_size;
2580
2581 skbstat = alloc_skb(len, GFP_ATOMIC);
2582 if (!skbstat) {
2583 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2584 "deliver stats: OOM\n");
2585 return -ENOMEM;
2586 }
2587
2588 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2589 (len - sizeof(*nlhstat)), 0);
2590 evstat = nlmsg_data(nlhstat);
2591 memset(evstat, 0, sizeof(*evstat));
2592 evstat->transport_handle = iscsi_handle(conn->transport);
2593 evstat->type = nlh->nlmsg_type;
2594 evstat->u.get_stats.cid =
2595 ev->u.get_stats.cid;
2596 evstat->u.get_stats.sid =
2597 ev->u.get_stats.sid;
2598 stats = (struct iscsi_stats *)
2599 ((char*)evstat + sizeof(*evstat));
2600 memset(stats, 0, sizeof(*stats));
2601
2602 transport->get_stats(conn, stats);
2603 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2604 sizeof(struct iscsi_stats) +
2605 sizeof(struct iscsi_stats_custom) *
2606 stats->custom_length);
2607 actual_size -= sizeof(*nlhstat);
2608 actual_size = nlmsg_msg_size(actual_size);
2609 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2610 nlhstat->nlmsg_len = actual_size;
2611
2612 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2613 GFP_ATOMIC);
2614 } while (err < 0 && err != -ECONNREFUSED);
2615
2616 return err;
2617 }
2618
2619 /**
2620 * iscsi_session_event - send session destr. completion event
2621 * @session: iscsi class session
2622 * @event: type of event
2623 */
2624 int iscsi_session_event(struct iscsi_cls_session *session,
2625 enum iscsi_uevent_e event)
2626 {
2627 struct iscsi_internal *priv;
2628 struct Scsi_Host *shost;
2629 struct iscsi_uevent *ev;
2630 struct sk_buff *skb;
2631 struct nlmsghdr *nlh;
2632 int rc, len = nlmsg_total_size(sizeof(*ev));
2633
2634 priv = iscsi_if_transport_lookup(session->transport);
2635 if (!priv)
2636 return -EINVAL;
2637 shost = iscsi_session_to_shost(session);
2638
2639 skb = alloc_skb(len, GFP_KERNEL);
2640 if (!skb) {
2641 iscsi_cls_session_printk(KERN_ERR, session,
2642 "Cannot notify userspace of session "
2643 "event %u\n", event);
2644 return -ENOMEM;
2645 }
2646
2647 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2648 ev = nlmsg_data(nlh);
2649 ev->transport_handle = iscsi_handle(session->transport);
2650
2651 ev->type = event;
2652 switch (event) {
2653 case ISCSI_KEVENT_DESTROY_SESSION:
2654 ev->r.d_session.host_no = shost->host_no;
2655 ev->r.d_session.sid = session->sid;
2656 break;
2657 case ISCSI_KEVENT_CREATE_SESSION:
2658 ev->r.c_session_ret.host_no = shost->host_no;
2659 ev->r.c_session_ret.sid = session->sid;
2660 break;
2661 case ISCSI_KEVENT_UNBIND_SESSION:
2662 ev->r.unbind_session.host_no = shost->host_no;
2663 ev->r.unbind_session.sid = session->sid;
2664 break;
2665 default:
2666 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2667 "%u.\n", event);
2668 kfree_skb(skb);
2669 return -EINVAL;
2670 }
2671
2672 /*
2673 * this will occur if the daemon is not up, so we just warn
2674 * the user and when the daemon is restarted it will handle it
2675 */
2676 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2677 if (rc == -ESRCH)
2678 iscsi_cls_session_printk(KERN_ERR, session,
2679 "Cannot notify userspace of session "
2680 "event %u. Check iscsi daemon\n",
2681 event);
2682
2683 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2684 event, rc);
2685 return rc;
2686 }
2687 EXPORT_SYMBOL_GPL(iscsi_session_event);
2688
2689 static int
2690 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2691 struct iscsi_uevent *ev, pid_t pid,
2692 uint32_t initial_cmdsn, uint16_t cmds_max,
2693 uint16_t queue_depth)
2694 {
2695 struct iscsi_transport *transport = priv->iscsi_transport;
2696 struct iscsi_cls_session *session;
2697 struct Scsi_Host *shost;
2698
2699 session = transport->create_session(ep, cmds_max, queue_depth,
2700 initial_cmdsn);
2701 if (!session)
2702 return -ENOMEM;
2703
2704 session->creator = pid;
2705 shost = iscsi_session_to_shost(session);
2706 ev->r.c_session_ret.host_no = shost->host_no;
2707 ev->r.c_session_ret.sid = session->sid;
2708 ISCSI_DBG_TRANS_SESSION(session,
2709 "Completed creating transport session\n");
2710 return 0;
2711 }
2712
2713 static int
2714 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2715 {
2716 struct iscsi_cls_conn *conn;
2717 struct iscsi_cls_session *session;
2718
2719 session = iscsi_session_lookup(ev->u.c_conn.sid);
2720 if (!session) {
2721 printk(KERN_ERR "iscsi: invalid session %d.\n",
2722 ev->u.c_conn.sid);
2723 return -EINVAL;
2724 }
2725
2726 conn = transport->create_conn(session, ev->u.c_conn.cid);
2727 if (!conn) {
2728 iscsi_cls_session_printk(KERN_ERR, session,
2729 "couldn't create a new connection.");
2730 return -ENOMEM;
2731 }
2732
2733 ev->r.c_conn_ret.sid = session->sid;
2734 ev->r.c_conn_ret.cid = conn->cid;
2735
2736 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2737 return 0;
2738 }
2739
2740 static int
2741 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2742 {
2743 struct iscsi_cls_conn *conn;
2744
2745 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2746 if (!conn)
2747 return -EINVAL;
2748
2749 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2750 if (transport->destroy_conn)
2751 transport->destroy_conn(conn);
2752
2753 return 0;
2754 }
2755
2756 static int
2757 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2758 {
2759 char *data = (char*)ev + sizeof(*ev);
2760 struct iscsi_cls_conn *conn;
2761 struct iscsi_cls_session *session;
2762 int err = 0, value = 0;
2763
2764 session = iscsi_session_lookup(ev->u.set_param.sid);
2765 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2766 if (!conn || !session)
2767 return -EINVAL;
2768
2769 switch (ev->u.set_param.param) {
2770 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2771 sscanf(data, "%d", &value);
2772 if (!session->recovery_tmo_sysfs_override)
2773 session->recovery_tmo = value;
2774 break;
2775 default:
2776 err = transport->set_param(conn, ev->u.set_param.param,
2777 data, ev->u.set_param.len);
2778 }
2779
2780 return err;
2781 }
2782
2783 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2784 struct iscsi_uevent *ev, int msg_type)
2785 {
2786 struct iscsi_endpoint *ep;
2787 struct sockaddr *dst_addr;
2788 struct Scsi_Host *shost = NULL;
2789 int non_blocking, err = 0;
2790
2791 if (!transport->ep_connect)
2792 return -EINVAL;
2793
2794 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2795 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2796 if (!shost) {
2797 printk(KERN_ERR "ep connect failed. Could not find "
2798 "host no %u\n",
2799 ev->u.ep_connect_through_host.host_no);
2800 return -ENODEV;
2801 }
2802 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2803 } else
2804 non_blocking = ev->u.ep_connect.non_blocking;
2805
2806 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2807 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2808 if (IS_ERR(ep)) {
2809 err = PTR_ERR(ep);
2810 goto release_host;
2811 }
2812
2813 ev->r.ep_connect_ret.handle = ep->id;
2814 release_host:
2815 if (shost)
2816 scsi_host_put(shost);
2817 return err;
2818 }
2819
2820 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2821 u64 ep_handle)
2822 {
2823 struct iscsi_cls_conn *conn;
2824 struct iscsi_endpoint *ep;
2825
2826 if (!transport->ep_disconnect)
2827 return -EINVAL;
2828
2829 ep = iscsi_lookup_endpoint(ep_handle);
2830 if (!ep)
2831 return -EINVAL;
2832 conn = ep->conn;
2833 if (conn) {
2834 mutex_lock(&conn->ep_mutex);
2835 conn->ep = NULL;
2836 mutex_unlock(&conn->ep_mutex);
2837 }
2838
2839 transport->ep_disconnect(ep);
2840 return 0;
2841 }
2842
2843 static int
2844 iscsi_if_transport_ep(struct iscsi_transport *transport,
2845 struct iscsi_uevent *ev, int msg_type)
2846 {
2847 struct iscsi_endpoint *ep;
2848 int rc = 0;
2849
2850 switch (msg_type) {
2851 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2852 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2853 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2854 break;
2855 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2856 if (!transport->ep_poll)
2857 return -EINVAL;
2858
2859 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2860 if (!ep)
2861 return -EINVAL;
2862
2863 ev->r.retcode = transport->ep_poll(ep,
2864 ev->u.ep_poll.timeout_ms);
2865 break;
2866 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2867 rc = iscsi_if_ep_disconnect(transport,
2868 ev->u.ep_disconnect.ep_handle);
2869 break;
2870 }
2871 return rc;
2872 }
2873
2874 static int
2875 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2876 struct iscsi_uevent *ev)
2877 {
2878 struct Scsi_Host *shost;
2879 struct sockaddr *dst_addr;
2880 int err;
2881
2882 if (!transport->tgt_dscvr)
2883 return -EINVAL;
2884
2885 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2886 if (!shost) {
2887 printk(KERN_ERR "target discovery could not find host no %u\n",
2888 ev->u.tgt_dscvr.host_no);
2889 return -ENODEV;
2890 }
2891
2892
2893 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2894 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2895 ev->u.tgt_dscvr.enable, dst_addr);
2896 scsi_host_put(shost);
2897 return err;
2898 }
2899
2900 static int
2901 iscsi_set_host_param(struct iscsi_transport *transport,
2902 struct iscsi_uevent *ev)
2903 {
2904 char *data = (char*)ev + sizeof(*ev);
2905 struct Scsi_Host *shost;
2906 int err;
2907
2908 if (!transport->set_host_param)
2909 return -ENOSYS;
2910
2911 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2912 if (!shost) {
2913 printk(KERN_ERR "set_host_param could not find host no %u\n",
2914 ev->u.set_host_param.host_no);
2915 return -ENODEV;
2916 }
2917
2918 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2919 data, ev->u.set_host_param.len);
2920 scsi_host_put(shost);
2921 return err;
2922 }
2923
2924 static int
2925 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2926 {
2927 struct Scsi_Host *shost;
2928 struct iscsi_path *params;
2929 int err;
2930
2931 if (!transport->set_path)
2932 return -ENOSYS;
2933
2934 shost = scsi_host_lookup(ev->u.set_path.host_no);
2935 if (!shost) {
2936 printk(KERN_ERR "set path could not find host no %u\n",
2937 ev->u.set_path.host_no);
2938 return -ENODEV;
2939 }
2940
2941 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2942 err = transport->set_path(shost, params);
2943
2944 scsi_host_put(shost);
2945 return err;
2946 }
2947
2948 static int
2949 iscsi_set_iface_params(struct iscsi_transport *transport,
2950 struct iscsi_uevent *ev, uint32_t len)
2951 {
2952 char *data = (char *)ev + sizeof(*ev);
2953 struct Scsi_Host *shost;
2954 int err;
2955
2956 if (!transport->set_iface_param)
2957 return -ENOSYS;
2958
2959 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2960 if (!shost) {
2961 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2962 ev->u.set_iface_params.host_no);
2963 return -ENODEV;
2964 }
2965
2966 err = transport->set_iface_param(shost, data, len);
2967 scsi_host_put(shost);
2968 return err;
2969 }
2970
2971 static int
2972 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2973 {
2974 struct Scsi_Host *shost;
2975 struct sockaddr *dst_addr;
2976 int err;
2977
2978 if (!transport->send_ping)
2979 return -ENOSYS;
2980
2981 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
2982 if (!shost) {
2983 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
2984 ev->u.iscsi_ping.host_no);
2985 return -ENODEV;
2986 }
2987
2988 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
2989 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
2990 ev->u.iscsi_ping.iface_type,
2991 ev->u.iscsi_ping.payload_size,
2992 ev->u.iscsi_ping.pid,
2993 dst_addr);
2994 scsi_host_put(shost);
2995 return err;
2996 }
2997
2998 static int
2999 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3000 {
3001 struct iscsi_uevent *ev = nlmsg_data(nlh);
3002 struct Scsi_Host *shost = NULL;
3003 struct iscsi_chap_rec *chap_rec;
3004 struct iscsi_internal *priv;
3005 struct sk_buff *skbchap;
3006 struct nlmsghdr *nlhchap;
3007 struct iscsi_uevent *evchap;
3008 uint32_t chap_buf_size;
3009 int len, err = 0;
3010 char *buf;
3011
3012 if (!transport->get_chap)
3013 return -EINVAL;
3014
3015 priv = iscsi_if_transport_lookup(transport);
3016 if (!priv)
3017 return -EINVAL;
3018
3019 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3020 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3021
3022 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3023 if (!shost) {
3024 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3025 __func__, ev->u.get_chap.host_no);
3026 return -ENODEV;
3027 }
3028
3029 do {
3030 int actual_size;
3031
3032 skbchap = alloc_skb(len, GFP_KERNEL);
3033 if (!skbchap) {
3034 printk(KERN_ERR "can not deliver chap: OOM\n");
3035 err = -ENOMEM;
3036 goto exit_get_chap;
3037 }
3038
3039 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3040 (len - sizeof(*nlhchap)), 0);
3041 evchap = nlmsg_data(nlhchap);
3042 memset(evchap, 0, sizeof(*evchap));
3043 evchap->transport_handle = iscsi_handle(transport);
3044 evchap->type = nlh->nlmsg_type;
3045 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3046 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3047 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3048 buf = (char *)evchap + sizeof(*evchap);
3049 memset(buf, 0, chap_buf_size);
3050
3051 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3052 &evchap->u.get_chap.num_entries, buf);
3053
3054 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3055 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3056 nlhchap->nlmsg_len = actual_size;
3057
3058 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3059 GFP_KERNEL);
3060 } while (err < 0 && err != -ECONNREFUSED);
3061
3062 exit_get_chap:
3063 scsi_host_put(shost);
3064 return err;
3065 }
3066
3067 static int iscsi_set_chap(struct iscsi_transport *transport,
3068 struct iscsi_uevent *ev, uint32_t len)
3069 {
3070 char *data = (char *)ev + sizeof(*ev);
3071 struct Scsi_Host *shost;
3072 int err = 0;
3073
3074 if (!transport->set_chap)
3075 return -ENOSYS;
3076
3077 shost = scsi_host_lookup(ev->u.set_path.host_no);
3078 if (!shost) {
3079 pr_err("%s could not find host no %u\n",
3080 __func__, ev->u.set_path.host_no);
3081 return -ENODEV;
3082 }
3083
3084 err = transport->set_chap(shost, data, len);
3085 scsi_host_put(shost);
3086 return err;
3087 }
3088
3089 static int iscsi_delete_chap(struct iscsi_transport *transport,
3090 struct iscsi_uevent *ev)
3091 {
3092 struct Scsi_Host *shost;
3093 int err = 0;
3094
3095 if (!transport->delete_chap)
3096 return -ENOSYS;
3097
3098 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3099 if (!shost) {
3100 printk(KERN_ERR "%s could not find host no %u\n",
3101 __func__, ev->u.delete_chap.host_no);
3102 return -ENODEV;
3103 }
3104
3105 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3106 scsi_host_put(shost);
3107 return err;
3108 }
3109
3110 static const struct {
3111 enum iscsi_discovery_parent_type value;
3112 char *name;
3113 } iscsi_discovery_parent_names[] = {
3114 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3115 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3116 {ISCSI_DISC_PARENT_ISNS, "isns" },
3117 };
3118
3119 char *iscsi_get_discovery_parent_name(int parent_type)
3120 {
3121 int i;
3122 char *state = "Unknown!";
3123
3124 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3125 if (iscsi_discovery_parent_names[i].value & parent_type) {
3126 state = iscsi_discovery_parent_names[i].name;
3127 break;
3128 }
3129 }
3130 return state;
3131 }
3132 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3133
3134 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3135 struct iscsi_uevent *ev, uint32_t len)
3136 {
3137 char *data = (char *)ev + sizeof(*ev);
3138 struct Scsi_Host *shost;
3139 struct iscsi_bus_flash_session *fnode_sess;
3140 struct iscsi_bus_flash_conn *fnode_conn;
3141 struct device *dev;
3142 uint32_t idx;
3143 int err = 0;
3144
3145 if (!transport->set_flashnode_param) {
3146 err = -ENOSYS;
3147 goto exit_set_fnode;
3148 }
3149
3150 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3151 if (!shost) {
3152 pr_err("%s could not find host no %u\n",
3153 __func__, ev->u.set_flashnode.host_no);
3154 err = -ENODEV;
3155 goto put_host;
3156 }
3157
3158 idx = ev->u.set_flashnode.flashnode_idx;
3159 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3160 if (!fnode_sess) {
3161 pr_err("%s could not find flashnode %u for host no %u\n",
3162 __func__, idx, ev->u.set_flashnode.host_no);
3163 err = -ENODEV;
3164 goto put_host;
3165 }
3166
3167 dev = iscsi_find_flashnode_conn(fnode_sess);
3168 if (!dev) {
3169 err = -ENODEV;
3170 goto put_sess;
3171 }
3172
3173 fnode_conn = iscsi_dev_to_flash_conn(dev);
3174 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3175 put_device(dev);
3176
3177 put_sess:
3178 put_device(&fnode_sess->dev);
3179
3180 put_host:
3181 scsi_host_put(shost);
3182
3183 exit_set_fnode:
3184 return err;
3185 }
3186
3187 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3188 struct iscsi_uevent *ev, uint32_t len)
3189 {
3190 char *data = (char *)ev + sizeof(*ev);
3191 struct Scsi_Host *shost;
3192 int index;
3193 int err = 0;
3194
3195 if (!transport->new_flashnode) {
3196 err = -ENOSYS;
3197 goto exit_new_fnode;
3198 }
3199
3200 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3201 if (!shost) {
3202 pr_err("%s could not find host no %u\n",
3203 __func__, ev->u.new_flashnode.host_no);
3204 err = -ENODEV;
3205 goto put_host;
3206 }
3207
3208 index = transport->new_flashnode(shost, data, len);
3209
3210 if (index >= 0)
3211 ev->r.new_flashnode_ret.flashnode_idx = index;
3212 else
3213 err = -EIO;
3214
3215 put_host:
3216 scsi_host_put(shost);
3217
3218 exit_new_fnode:
3219 return err;
3220 }
3221
3222 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3223 struct iscsi_uevent *ev)
3224 {
3225 struct Scsi_Host *shost;
3226 struct iscsi_bus_flash_session *fnode_sess;
3227 uint32_t idx;
3228 int err = 0;
3229
3230 if (!transport->del_flashnode) {
3231 err = -ENOSYS;
3232 goto exit_del_fnode;
3233 }
3234
3235 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3236 if (!shost) {
3237 pr_err("%s could not find host no %u\n",
3238 __func__, ev->u.del_flashnode.host_no);
3239 err = -ENODEV;
3240 goto put_host;
3241 }
3242
3243 idx = ev->u.del_flashnode.flashnode_idx;
3244 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3245 if (!fnode_sess) {
3246 pr_err("%s could not find flashnode %u for host no %u\n",
3247 __func__, idx, ev->u.del_flashnode.host_no);
3248 err = -ENODEV;
3249 goto put_host;
3250 }
3251
3252 err = transport->del_flashnode(fnode_sess);
3253 put_device(&fnode_sess->dev);
3254
3255 put_host:
3256 scsi_host_put(shost);
3257
3258 exit_del_fnode:
3259 return err;
3260 }
3261
3262 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3263 struct iscsi_uevent *ev)
3264 {
3265 struct Scsi_Host *shost;
3266 struct iscsi_bus_flash_session *fnode_sess;
3267 struct iscsi_bus_flash_conn *fnode_conn;
3268 struct device *dev;
3269 uint32_t idx;
3270 int err = 0;
3271
3272 if (!transport->login_flashnode) {
3273 err = -ENOSYS;
3274 goto exit_login_fnode;
3275 }
3276
3277 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3278 if (!shost) {
3279 pr_err("%s could not find host no %u\n",
3280 __func__, ev->u.login_flashnode.host_no);
3281 err = -ENODEV;
3282 goto put_host;
3283 }
3284
3285 idx = ev->u.login_flashnode.flashnode_idx;
3286 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3287 if (!fnode_sess) {
3288 pr_err("%s could not find flashnode %u for host no %u\n",
3289 __func__, idx, ev->u.login_flashnode.host_no);
3290 err = -ENODEV;
3291 goto put_host;
3292 }
3293
3294 dev = iscsi_find_flashnode_conn(fnode_sess);
3295 if (!dev) {
3296 err = -ENODEV;
3297 goto put_sess;
3298 }
3299
3300 fnode_conn = iscsi_dev_to_flash_conn(dev);
3301 err = transport->login_flashnode(fnode_sess, fnode_conn);
3302 put_device(dev);
3303
3304 put_sess:
3305 put_device(&fnode_sess->dev);
3306
3307 put_host:
3308 scsi_host_put(shost);
3309
3310 exit_login_fnode:
3311 return err;
3312 }
3313
3314 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3315 struct iscsi_uevent *ev)
3316 {
3317 struct Scsi_Host *shost;
3318 struct iscsi_bus_flash_session *fnode_sess;
3319 struct iscsi_bus_flash_conn *fnode_conn;
3320 struct device *dev;
3321 uint32_t idx;
3322 int err = 0;
3323
3324 if (!transport->logout_flashnode) {
3325 err = -ENOSYS;
3326 goto exit_logout_fnode;
3327 }
3328
3329 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3330 if (!shost) {
3331 pr_err("%s could not find host no %u\n",
3332 __func__, ev->u.logout_flashnode.host_no);
3333 err = -ENODEV;
3334 goto put_host;
3335 }
3336
3337 idx = ev->u.logout_flashnode.flashnode_idx;
3338 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3339 if (!fnode_sess) {
3340 pr_err("%s could not find flashnode %u for host no %u\n",
3341 __func__, idx, ev->u.logout_flashnode.host_no);
3342 err = -ENODEV;
3343 goto put_host;
3344 }
3345
3346 dev = iscsi_find_flashnode_conn(fnode_sess);
3347 if (!dev) {
3348 err = -ENODEV;
3349 goto put_sess;
3350 }
3351
3352 fnode_conn = iscsi_dev_to_flash_conn(dev);
3353
3354 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3355 put_device(dev);
3356
3357 put_sess:
3358 put_device(&fnode_sess->dev);
3359
3360 put_host:
3361 scsi_host_put(shost);
3362
3363 exit_logout_fnode:
3364 return err;
3365 }
3366
3367 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3368 struct iscsi_uevent *ev)
3369 {
3370 struct Scsi_Host *shost;
3371 struct iscsi_cls_session *session;
3372 int err = 0;
3373
3374 if (!transport->logout_flashnode_sid) {
3375 err = -ENOSYS;
3376 goto exit_logout_sid;
3377 }
3378
3379 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3380 if (!shost) {
3381 pr_err("%s could not find host no %u\n",
3382 __func__, ev->u.logout_flashnode.host_no);
3383 err = -ENODEV;
3384 goto put_host;
3385 }
3386
3387 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3388 if (!session) {
3389 pr_err("%s could not find session id %u\n",
3390 __func__, ev->u.logout_flashnode_sid.sid);
3391 err = -EINVAL;
3392 goto put_host;
3393 }
3394
3395 err = transport->logout_flashnode_sid(session);
3396
3397 put_host:
3398 scsi_host_put(shost);
3399
3400 exit_logout_sid:
3401 return err;
3402 }
3403
3404 static int
3405 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3406 {
3407 struct iscsi_uevent *ev = nlmsg_data(nlh);
3408 struct Scsi_Host *shost = NULL;
3409 struct iscsi_internal *priv;
3410 struct sk_buff *skbhost_stats;
3411 struct nlmsghdr *nlhhost_stats;
3412 struct iscsi_uevent *evhost_stats;
3413 int host_stats_size = 0;
3414 int len, err = 0;
3415 char *buf;
3416
3417 if (!transport->get_host_stats)
3418 return -ENOSYS;
3419
3420 priv = iscsi_if_transport_lookup(transport);
3421 if (!priv)
3422 return -EINVAL;
3423
3424 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3425 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3426
3427 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3428 if (!shost) {
3429 pr_err("%s: failed. Could not find host no %u\n",
3430 __func__, ev->u.get_host_stats.host_no);
3431 return -ENODEV;
3432 }
3433
3434 do {
3435 int actual_size;
3436
3437 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3438 if (!skbhost_stats) {
3439 pr_err("cannot deliver host stats: OOM\n");
3440 err = -ENOMEM;
3441 goto exit_host_stats;
3442 }
3443
3444 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3445 (len - sizeof(*nlhhost_stats)), 0);
3446 evhost_stats = nlmsg_data(nlhhost_stats);
3447 memset(evhost_stats, 0, sizeof(*evhost_stats));
3448 evhost_stats->transport_handle = iscsi_handle(transport);
3449 evhost_stats->type = nlh->nlmsg_type;
3450 evhost_stats->u.get_host_stats.host_no =
3451 ev->u.get_host_stats.host_no;
3452 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3453 memset(buf, 0, host_stats_size);
3454
3455 err = transport->get_host_stats(shost, buf, host_stats_size);
3456 if (err) {
3457 kfree_skb(skbhost_stats);
3458 goto exit_host_stats;
3459 }
3460
3461 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3462 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3463 nlhhost_stats->nlmsg_len = actual_size;
3464
3465 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3466 GFP_KERNEL);
3467 } while (err < 0 && err != -ECONNREFUSED);
3468
3469 exit_host_stats:
3470 scsi_host_put(shost);
3471 return err;
3472 }
3473
3474
3475 static int
3476 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3477 {
3478 int err = 0;
3479 u32 portid;
3480 struct iscsi_uevent *ev = nlmsg_data(nlh);
3481 struct iscsi_transport *transport = NULL;
3482 struct iscsi_internal *priv;
3483 struct iscsi_cls_session *session;
3484 struct iscsi_cls_conn *conn;
3485 struct iscsi_endpoint *ep = NULL;
3486
3487 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3488 *group = ISCSI_NL_GRP_UIP;
3489 else
3490 *group = ISCSI_NL_GRP_ISCSID;
3491
3492 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3493 if (!priv)
3494 return -EINVAL;
3495 transport = priv->iscsi_transport;
3496
3497 if (!try_module_get(transport->owner))
3498 return -EINVAL;
3499
3500 portid = NETLINK_CB(skb).portid;
3501
3502 switch (nlh->nlmsg_type) {
3503 case ISCSI_UEVENT_CREATE_SESSION:
3504 err = iscsi_if_create_session(priv, ep, ev,
3505 portid,
3506 ev->u.c_session.initial_cmdsn,
3507 ev->u.c_session.cmds_max,
3508 ev->u.c_session.queue_depth);
3509 break;
3510 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3511 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3512 if (!ep) {
3513 err = -EINVAL;
3514 break;
3515 }
3516
3517 err = iscsi_if_create_session(priv, ep, ev,
3518 portid,
3519 ev->u.c_bound_session.initial_cmdsn,
3520 ev->u.c_bound_session.cmds_max,
3521 ev->u.c_bound_session.queue_depth);
3522 break;
3523 case ISCSI_UEVENT_DESTROY_SESSION:
3524 session = iscsi_session_lookup(ev->u.d_session.sid);
3525 if (session)
3526 transport->destroy_session(session);
3527 else
3528 err = -EINVAL;
3529 break;
3530 case ISCSI_UEVENT_UNBIND_SESSION:
3531 session = iscsi_session_lookup(ev->u.d_session.sid);
3532 if (session)
3533 scsi_queue_work(iscsi_session_to_shost(session),
3534 &session->unbind_work);
3535 else
3536 err = -EINVAL;
3537 break;
3538 case ISCSI_UEVENT_CREATE_CONN:
3539 err = iscsi_if_create_conn(transport, ev);
3540 break;
3541 case ISCSI_UEVENT_DESTROY_CONN:
3542 err = iscsi_if_destroy_conn(transport, ev);
3543 break;
3544 case ISCSI_UEVENT_BIND_CONN:
3545 session = iscsi_session_lookup(ev->u.b_conn.sid);
3546 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3547
3548 if (conn && conn->ep)
3549 iscsi_if_ep_disconnect(transport, conn->ep->id);
3550
3551 if (!session || !conn) {
3552 err = -EINVAL;
3553 break;
3554 }
3555
3556 ev->r.retcode = transport->bind_conn(session, conn,
3557 ev->u.b_conn.transport_eph,
3558 ev->u.b_conn.is_leading);
3559 if (ev->r.retcode || !transport->ep_connect)
3560 break;
3561
3562 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3563 if (ep) {
3564 ep->conn = conn;
3565
3566 mutex_lock(&conn->ep_mutex);
3567 conn->ep = ep;
3568 mutex_unlock(&conn->ep_mutex);
3569 } else
3570 iscsi_cls_conn_printk(KERN_ERR, conn,
3571 "Could not set ep conn "
3572 "binding\n");
3573 break;
3574 case ISCSI_UEVENT_SET_PARAM:
3575 err = iscsi_set_param(transport, ev);
3576 break;
3577 case ISCSI_UEVENT_START_CONN:
3578 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3579 if (conn)
3580 ev->r.retcode = transport->start_conn(conn);
3581 else
3582 err = -EINVAL;
3583 break;
3584 case ISCSI_UEVENT_STOP_CONN:
3585 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3586 if (conn)
3587 transport->stop_conn(conn, ev->u.stop_conn.flag);
3588 else
3589 err = -EINVAL;
3590 break;
3591 case ISCSI_UEVENT_SEND_PDU:
3592 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3593 if (conn)
3594 ev->r.retcode = transport->send_pdu(conn,
3595 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3596 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3597 ev->u.send_pdu.data_size);
3598 else
3599 err = -EINVAL;
3600 break;
3601 case ISCSI_UEVENT_GET_STATS:
3602 err = iscsi_if_get_stats(transport, nlh);
3603 break;
3604 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3605 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3606 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3607 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3608 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3609 break;
3610 case ISCSI_UEVENT_TGT_DSCVR:
3611 err = iscsi_tgt_dscvr(transport, ev);
3612 break;
3613 case ISCSI_UEVENT_SET_HOST_PARAM:
3614 err = iscsi_set_host_param(transport, ev);
3615 break;
3616 case ISCSI_UEVENT_PATH_UPDATE:
3617 err = iscsi_set_path(transport, ev);
3618 break;
3619 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3620 err = iscsi_set_iface_params(transport, ev,
3621 nlmsg_attrlen(nlh, sizeof(*ev)));
3622 break;
3623 case ISCSI_UEVENT_PING:
3624 err = iscsi_send_ping(transport, ev);
3625 break;
3626 case ISCSI_UEVENT_GET_CHAP:
3627 err = iscsi_get_chap(transport, nlh);
3628 break;
3629 case ISCSI_UEVENT_DELETE_CHAP:
3630 err = iscsi_delete_chap(transport, ev);
3631 break;
3632 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3633 err = iscsi_set_flashnode_param(transport, ev,
3634 nlmsg_attrlen(nlh,
3635 sizeof(*ev)));
3636 break;
3637 case ISCSI_UEVENT_NEW_FLASHNODE:
3638 err = iscsi_new_flashnode(transport, ev,
3639 nlmsg_attrlen(nlh, sizeof(*ev)));
3640 break;
3641 case ISCSI_UEVENT_DEL_FLASHNODE:
3642 err = iscsi_del_flashnode(transport, ev);
3643 break;
3644 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3645 err = iscsi_login_flashnode(transport, ev);
3646 break;
3647 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3648 err = iscsi_logout_flashnode(transport, ev);
3649 break;
3650 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3651 err = iscsi_logout_flashnode_sid(transport, ev);
3652 break;
3653 case ISCSI_UEVENT_SET_CHAP:
3654 err = iscsi_set_chap(transport, ev,
3655 nlmsg_attrlen(nlh, sizeof(*ev)));
3656 break;
3657 case ISCSI_UEVENT_GET_HOST_STATS:
3658 err = iscsi_get_host_stats(transport, nlh);
3659 break;
3660 default:
3661 err = -ENOSYS;
3662 break;
3663 }
3664
3665 module_put(transport->owner);
3666 return err;
3667 }
3668
3669 /*
3670 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3671 * Malformed skbs with wrong lengths or invalid creds are not processed.
3672 */
3673 static void
3674 iscsi_if_rx(struct sk_buff *skb)
3675 {
3676 u32 portid = NETLINK_CB(skb).portid;
3677
3678 mutex_lock(&rx_queue_mutex);
3679 while (skb->len >= NLMSG_HDRLEN) {
3680 int err;
3681 uint32_t rlen;
3682 struct nlmsghdr *nlh;
3683 struct iscsi_uevent *ev;
3684 uint32_t group;
3685
3686 nlh = nlmsg_hdr(skb);
3687 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3688 skb->len < nlh->nlmsg_len) {
3689 break;
3690 }
3691
3692 ev = nlmsg_data(nlh);
3693 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3694 if (rlen > skb->len)
3695 rlen = skb->len;
3696
3697 err = iscsi_if_recv_msg(skb, nlh, &group);
3698 if (err) {
3699 ev->type = ISCSI_KEVENT_IF_ERROR;
3700 ev->iferror = err;
3701 }
3702 do {
3703 /*
3704 * special case for GET_STATS:
3705 * on success - sending reply and stats from
3706 * inside of if_recv_msg(),
3707 * on error - fall through.
3708 */
3709 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3710 break;
3711 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3712 break;
3713 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3714 ev, sizeof(*ev));
3715 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3716 skb_pull(skb, rlen);
3717 }
3718 mutex_unlock(&rx_queue_mutex);
3719 }
3720
3721 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3722 struct device_attribute dev_attr_##_prefix##_##_name = \
3723 __ATTR(_name,_mode,_show,_store)
3724
3725 /*
3726 * iSCSI connection attrs
3727 */
3728 #define iscsi_conn_attr_show(param) \
3729 static ssize_t \
3730 show_conn_param_##param(struct device *dev, \
3731 struct device_attribute *attr, char *buf) \
3732 { \
3733 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3734 struct iscsi_transport *t = conn->transport; \
3735 return t->get_conn_param(conn, param, buf); \
3736 }
3737
3738 #define iscsi_conn_attr(field, param) \
3739 iscsi_conn_attr_show(param) \
3740 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3741 NULL);
3742
3743 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3744 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3745 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3746 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3747 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3748 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3749 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3750 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3751 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3752 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3753 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3754 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3755 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3756 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3757 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3758 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3759 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3760 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3761 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3762 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3763 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3764 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3765 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3766 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3767 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3768 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3769 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3770 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3771
3772
3773 #define iscsi_conn_ep_attr_show(param) \
3774 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3775 struct device_attribute *attr,\
3776 char *buf) \
3777 { \
3778 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3779 struct iscsi_transport *t = conn->transport; \
3780 struct iscsi_endpoint *ep; \
3781 ssize_t rc; \
3782 \
3783 /* \
3784 * Need to make sure ep_disconnect does not free the LLD's \
3785 * interconnect resources while we are trying to read them. \
3786 */ \
3787 mutex_lock(&conn->ep_mutex); \
3788 ep = conn->ep; \
3789 if (!ep && t->ep_connect) { \
3790 mutex_unlock(&conn->ep_mutex); \
3791 return -ENOTCONN; \
3792 } \
3793 \
3794 if (ep) \
3795 rc = t->get_ep_param(ep, param, buf); \
3796 else \
3797 rc = t->get_conn_param(conn, param, buf); \
3798 mutex_unlock(&conn->ep_mutex); \
3799 return rc; \
3800 }
3801
3802 #define iscsi_conn_ep_attr(field, param) \
3803 iscsi_conn_ep_attr_show(param) \
3804 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3805 show_conn_ep_param_##param, NULL);
3806
3807 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3808 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3809
3810 static struct attribute *iscsi_conn_attrs[] = {
3811 &dev_attr_conn_max_recv_dlength.attr,
3812 &dev_attr_conn_max_xmit_dlength.attr,
3813 &dev_attr_conn_header_digest.attr,
3814 &dev_attr_conn_data_digest.attr,
3815 &dev_attr_conn_ifmarker.attr,
3816 &dev_attr_conn_ofmarker.attr,
3817 &dev_attr_conn_address.attr,
3818 &dev_attr_conn_port.attr,
3819 &dev_attr_conn_exp_statsn.attr,
3820 &dev_attr_conn_persistent_address.attr,
3821 &dev_attr_conn_persistent_port.attr,
3822 &dev_attr_conn_ping_tmo.attr,
3823 &dev_attr_conn_recv_tmo.attr,
3824 &dev_attr_conn_local_port.attr,
3825 &dev_attr_conn_statsn.attr,
3826 &dev_attr_conn_keepalive_tmo.attr,
3827 &dev_attr_conn_max_segment_size.attr,
3828 &dev_attr_conn_tcp_timestamp_stat.attr,
3829 &dev_attr_conn_tcp_wsf_disable.attr,
3830 &dev_attr_conn_tcp_nagle_disable.attr,
3831 &dev_attr_conn_tcp_timer_scale.attr,
3832 &dev_attr_conn_tcp_timestamp_enable.attr,
3833 &dev_attr_conn_fragment_disable.attr,
3834 &dev_attr_conn_ipv4_tos.attr,
3835 &dev_attr_conn_ipv6_traffic_class.attr,
3836 &dev_attr_conn_ipv6_flow_label.attr,
3837 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3838 &dev_attr_conn_tcp_xmit_wsf.attr,
3839 &dev_attr_conn_tcp_recv_wsf.attr,
3840 &dev_attr_conn_local_ipaddr.attr,
3841 NULL,
3842 };
3843
3844 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3845 struct attribute *attr, int i)
3846 {
3847 struct device *cdev = container_of(kobj, struct device, kobj);
3848 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3849 struct iscsi_transport *t = conn->transport;
3850 int param;
3851
3852 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3853 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3854 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3855 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3856 else if (attr == &dev_attr_conn_header_digest.attr)
3857 param = ISCSI_PARAM_HDRDGST_EN;
3858 else if (attr == &dev_attr_conn_data_digest.attr)
3859 param = ISCSI_PARAM_DATADGST_EN;
3860 else if (attr == &dev_attr_conn_ifmarker.attr)
3861 param = ISCSI_PARAM_IFMARKER_EN;
3862 else if (attr == &dev_attr_conn_ofmarker.attr)
3863 param = ISCSI_PARAM_OFMARKER_EN;
3864 else if (attr == &dev_attr_conn_address.attr)
3865 param = ISCSI_PARAM_CONN_ADDRESS;
3866 else if (attr == &dev_attr_conn_port.attr)
3867 param = ISCSI_PARAM_CONN_PORT;
3868 else if (attr == &dev_attr_conn_exp_statsn.attr)
3869 param = ISCSI_PARAM_EXP_STATSN;
3870 else if (attr == &dev_attr_conn_persistent_address.attr)
3871 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3872 else if (attr == &dev_attr_conn_persistent_port.attr)
3873 param = ISCSI_PARAM_PERSISTENT_PORT;
3874 else if (attr == &dev_attr_conn_ping_tmo.attr)
3875 param = ISCSI_PARAM_PING_TMO;
3876 else if (attr == &dev_attr_conn_recv_tmo.attr)
3877 param = ISCSI_PARAM_RECV_TMO;
3878 else if (attr == &dev_attr_conn_local_port.attr)
3879 param = ISCSI_PARAM_LOCAL_PORT;
3880 else if (attr == &dev_attr_conn_statsn.attr)
3881 param = ISCSI_PARAM_STATSN;
3882 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3883 param = ISCSI_PARAM_KEEPALIVE_TMO;
3884 else if (attr == &dev_attr_conn_max_segment_size.attr)
3885 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3886 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3887 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3888 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3889 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3890 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3891 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3892 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3893 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3894 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3895 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3896 else if (attr == &dev_attr_conn_fragment_disable.attr)
3897 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3898 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3899 param = ISCSI_PARAM_IPV4_TOS;
3900 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3901 param = ISCSI_PARAM_IPV6_TC;
3902 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3903 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3904 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3905 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3906 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3907 param = ISCSI_PARAM_TCP_XMIT_WSF;
3908 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3909 param = ISCSI_PARAM_TCP_RECV_WSF;
3910 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3911 param = ISCSI_PARAM_LOCAL_IPADDR;
3912 else {
3913 WARN_ONCE(1, "Invalid conn attr");
3914 return 0;
3915 }
3916
3917 return t->attr_is_visible(ISCSI_PARAM, param);
3918 }
3919
3920 static struct attribute_group iscsi_conn_group = {
3921 .attrs = iscsi_conn_attrs,
3922 .is_visible = iscsi_conn_attr_is_visible,
3923 };
3924
3925 /*
3926 * iSCSI session attrs
3927 */
3928 #define iscsi_session_attr_show(param, perm) \
3929 static ssize_t \
3930 show_session_param_##param(struct device *dev, \
3931 struct device_attribute *attr, char *buf) \
3932 { \
3933 struct iscsi_cls_session *session = \
3934 iscsi_dev_to_session(dev->parent); \
3935 struct iscsi_transport *t = session->transport; \
3936 \
3937 if (perm && !capable(CAP_SYS_ADMIN)) \
3938 return -EACCES; \
3939 return t->get_session_param(session, param, buf); \
3940 }
3941
3942 #define iscsi_session_attr(field, param, perm) \
3943 iscsi_session_attr_show(param, perm) \
3944 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3945 NULL);
3946 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3947 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3948 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3949 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3950 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3951 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3952 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3953 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3954 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3955 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3956 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3957 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3958 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3959 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
3960 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3961 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
3962 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3963 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3964 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3965 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
3966 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3967 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3968 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3969 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3970 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3971 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
3972 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3973 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3974 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3975 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3976 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3977 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3978 iscsi_session_attr(discovery_auth_optional,
3979 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3980 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3981 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3982 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3983 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3984 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3985 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3986 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
3987
3988 static ssize_t
3989 show_priv_session_state(struct device *dev, struct device_attribute *attr,
3990 char *buf)
3991 {
3992 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
3993 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
3994 }
3995 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
3996 NULL);
3997 static ssize_t
3998 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
3999 char *buf)
4000 {
4001 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4002 return sprintf(buf, "%d\n", session->creator);
4003 }
4004 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4005 NULL);
4006 static ssize_t
4007 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4008 char *buf)
4009 {
4010 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4011 return sprintf(buf, "%d\n", session->target_id);
4012 }
4013 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4014 show_priv_session_target_id, NULL);
4015
4016 #define iscsi_priv_session_attr_show(field, format) \
4017 static ssize_t \
4018 show_priv_session_##field(struct device *dev, \
4019 struct device_attribute *attr, char *buf) \
4020 { \
4021 struct iscsi_cls_session *session = \
4022 iscsi_dev_to_session(dev->parent); \
4023 if (session->field == -1) \
4024 return sprintf(buf, "off\n"); \
4025 return sprintf(buf, format"\n", session->field); \
4026 }
4027
4028 #define iscsi_priv_session_attr_store(field) \
4029 static ssize_t \
4030 store_priv_session_##field(struct device *dev, \
4031 struct device_attribute *attr, \
4032 const char *buf, size_t count) \
4033 { \
4034 int val; \
4035 char *cp; \
4036 struct iscsi_cls_session *session = \
4037 iscsi_dev_to_session(dev->parent); \
4038 if ((session->state == ISCSI_SESSION_FREE) || \
4039 (session->state == ISCSI_SESSION_FAILED)) \
4040 return -EBUSY; \
4041 if (strncmp(buf, "off", 3) == 0) { \
4042 session->field = -1; \
4043 session->field##_sysfs_override = true; \
4044 } else { \
4045 val = simple_strtoul(buf, &cp, 0); \
4046 if (*cp != '\0' && *cp != '\n') \
4047 return -EINVAL; \
4048 session->field = val; \
4049 session->field##_sysfs_override = true; \
4050 } \
4051 return count; \
4052 }
4053
4054 #define iscsi_priv_session_rw_attr(field, format) \
4055 iscsi_priv_session_attr_show(field, format) \
4056 iscsi_priv_session_attr_store(field) \
4057 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4058 show_priv_session_##field, \
4059 store_priv_session_##field)
4060
4061 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4062
4063 static struct attribute *iscsi_session_attrs[] = {
4064 &dev_attr_sess_initial_r2t.attr,
4065 &dev_attr_sess_max_outstanding_r2t.attr,
4066 &dev_attr_sess_immediate_data.attr,
4067 &dev_attr_sess_first_burst_len.attr,
4068 &dev_attr_sess_max_burst_len.attr,
4069 &dev_attr_sess_data_pdu_in_order.attr,
4070 &dev_attr_sess_data_seq_in_order.attr,
4071 &dev_attr_sess_erl.attr,
4072 &dev_attr_sess_targetname.attr,
4073 &dev_attr_sess_tpgt.attr,
4074 &dev_attr_sess_password.attr,
4075 &dev_attr_sess_password_in.attr,
4076 &dev_attr_sess_username.attr,
4077 &dev_attr_sess_username_in.attr,
4078 &dev_attr_sess_fast_abort.attr,
4079 &dev_attr_sess_abort_tmo.attr,
4080 &dev_attr_sess_lu_reset_tmo.attr,
4081 &dev_attr_sess_tgt_reset_tmo.attr,
4082 &dev_attr_sess_ifacename.attr,
4083 &dev_attr_sess_initiatorname.attr,
4084 &dev_attr_sess_targetalias.attr,
4085 &dev_attr_sess_boot_root.attr,
4086 &dev_attr_sess_boot_nic.attr,
4087 &dev_attr_sess_boot_target.attr,
4088 &dev_attr_priv_sess_recovery_tmo.attr,
4089 &dev_attr_priv_sess_state.attr,
4090 &dev_attr_priv_sess_creator.attr,
4091 &dev_attr_sess_chap_out_idx.attr,
4092 &dev_attr_sess_chap_in_idx.attr,
4093 &dev_attr_priv_sess_target_id.attr,
4094 &dev_attr_sess_auto_snd_tgt_disable.attr,
4095 &dev_attr_sess_discovery_session.attr,
4096 &dev_attr_sess_portal_type.attr,
4097 &dev_attr_sess_chap_auth.attr,
4098 &dev_attr_sess_discovery_logout.attr,
4099 &dev_attr_sess_bidi_chap.attr,
4100 &dev_attr_sess_discovery_auth_optional.attr,
4101 &dev_attr_sess_def_time2wait.attr,
4102 &dev_attr_sess_def_time2retain.attr,
4103 &dev_attr_sess_isid.attr,
4104 &dev_attr_sess_tsid.attr,
4105 &dev_attr_sess_def_taskmgmt_tmo.attr,
4106 &dev_attr_sess_discovery_parent_idx.attr,
4107 &dev_attr_sess_discovery_parent_type.attr,
4108 NULL,
4109 };
4110
4111 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4112 struct attribute *attr, int i)
4113 {
4114 struct device *cdev = container_of(kobj, struct device, kobj);
4115 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4116 struct iscsi_transport *t = session->transport;
4117 int param;
4118
4119 if (attr == &dev_attr_sess_initial_r2t.attr)
4120 param = ISCSI_PARAM_INITIAL_R2T_EN;
4121 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4122 param = ISCSI_PARAM_MAX_R2T;
4123 else if (attr == &dev_attr_sess_immediate_data.attr)
4124 param = ISCSI_PARAM_IMM_DATA_EN;
4125 else if (attr == &dev_attr_sess_first_burst_len.attr)
4126 param = ISCSI_PARAM_FIRST_BURST;
4127 else if (attr == &dev_attr_sess_max_burst_len.attr)
4128 param = ISCSI_PARAM_MAX_BURST;
4129 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4130 param = ISCSI_PARAM_PDU_INORDER_EN;
4131 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4132 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4133 else if (attr == &dev_attr_sess_erl.attr)
4134 param = ISCSI_PARAM_ERL;
4135 else if (attr == &dev_attr_sess_targetname.attr)
4136 param = ISCSI_PARAM_TARGET_NAME;
4137 else if (attr == &dev_attr_sess_tpgt.attr)
4138 param = ISCSI_PARAM_TPGT;
4139 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4140 param = ISCSI_PARAM_CHAP_IN_IDX;
4141 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4142 param = ISCSI_PARAM_CHAP_OUT_IDX;
4143 else if (attr == &dev_attr_sess_password.attr)
4144 param = ISCSI_PARAM_USERNAME;
4145 else if (attr == &dev_attr_sess_password_in.attr)
4146 param = ISCSI_PARAM_USERNAME_IN;
4147 else if (attr == &dev_attr_sess_username.attr)
4148 param = ISCSI_PARAM_PASSWORD;
4149 else if (attr == &dev_attr_sess_username_in.attr)
4150 param = ISCSI_PARAM_PASSWORD_IN;
4151 else if (attr == &dev_attr_sess_fast_abort.attr)
4152 param = ISCSI_PARAM_FAST_ABORT;
4153 else if (attr == &dev_attr_sess_abort_tmo.attr)
4154 param = ISCSI_PARAM_ABORT_TMO;
4155 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4156 param = ISCSI_PARAM_LU_RESET_TMO;
4157 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4158 param = ISCSI_PARAM_TGT_RESET_TMO;
4159 else if (attr == &dev_attr_sess_ifacename.attr)
4160 param = ISCSI_PARAM_IFACE_NAME;
4161 else if (attr == &dev_attr_sess_initiatorname.attr)
4162 param = ISCSI_PARAM_INITIATOR_NAME;
4163 else if (attr == &dev_attr_sess_targetalias.attr)
4164 param = ISCSI_PARAM_TARGET_ALIAS;
4165 else if (attr == &dev_attr_sess_boot_root.attr)
4166 param = ISCSI_PARAM_BOOT_ROOT;
4167 else if (attr == &dev_attr_sess_boot_nic.attr)
4168 param = ISCSI_PARAM_BOOT_NIC;
4169 else if (attr == &dev_attr_sess_boot_target.attr)
4170 param = ISCSI_PARAM_BOOT_TARGET;
4171 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4172 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4173 else if (attr == &dev_attr_sess_discovery_session.attr)
4174 param = ISCSI_PARAM_DISCOVERY_SESS;
4175 else if (attr == &dev_attr_sess_portal_type.attr)
4176 param = ISCSI_PARAM_PORTAL_TYPE;
4177 else if (attr == &dev_attr_sess_chap_auth.attr)
4178 param = ISCSI_PARAM_CHAP_AUTH_EN;
4179 else if (attr == &dev_attr_sess_discovery_logout.attr)
4180 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4181 else if (attr == &dev_attr_sess_bidi_chap.attr)
4182 param = ISCSI_PARAM_BIDI_CHAP_EN;
4183 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4184 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4185 else if (attr == &dev_attr_sess_def_time2wait.attr)
4186 param = ISCSI_PARAM_DEF_TIME2WAIT;
4187 else if (attr == &dev_attr_sess_def_time2retain.attr)
4188 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4189 else if (attr == &dev_attr_sess_isid.attr)
4190 param = ISCSI_PARAM_ISID;
4191 else if (attr == &dev_attr_sess_tsid.attr)
4192 param = ISCSI_PARAM_TSID;
4193 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4194 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4195 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4196 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4197 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4198 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4199 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4200 return S_IRUGO | S_IWUSR;
4201 else if (attr == &dev_attr_priv_sess_state.attr)
4202 return S_IRUGO;
4203 else if (attr == &dev_attr_priv_sess_creator.attr)
4204 return S_IRUGO;
4205 else if (attr == &dev_attr_priv_sess_target_id.attr)
4206 return S_IRUGO;
4207 else {
4208 WARN_ONCE(1, "Invalid session attr");
4209 return 0;
4210 }
4211
4212 return t->attr_is_visible(ISCSI_PARAM, param);
4213 }
4214
4215 static struct attribute_group iscsi_session_group = {
4216 .attrs = iscsi_session_attrs,
4217 .is_visible = iscsi_session_attr_is_visible,
4218 };
4219
4220 /*
4221 * iSCSI host attrs
4222 */
4223 #define iscsi_host_attr_show(param) \
4224 static ssize_t \
4225 show_host_param_##param(struct device *dev, \
4226 struct device_attribute *attr, char *buf) \
4227 { \
4228 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4229 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4230 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4231 }
4232
4233 #define iscsi_host_attr(field, param) \
4234 iscsi_host_attr_show(param) \
4235 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4236 NULL);
4237
4238 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4239 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4240 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4241 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4242 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4243 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4244
4245 static struct attribute *iscsi_host_attrs[] = {
4246 &dev_attr_host_netdev.attr,
4247 &dev_attr_host_hwaddress.attr,
4248 &dev_attr_host_ipaddress.attr,
4249 &dev_attr_host_initiatorname.attr,
4250 &dev_attr_host_port_state.attr,
4251 &dev_attr_host_port_speed.attr,
4252 NULL,
4253 };
4254
4255 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4256 struct attribute *attr, int i)
4257 {
4258 struct device *cdev = container_of(kobj, struct device, kobj);
4259 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4260 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4261 int param;
4262
4263 if (attr == &dev_attr_host_netdev.attr)
4264 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4265 else if (attr == &dev_attr_host_hwaddress.attr)
4266 param = ISCSI_HOST_PARAM_HWADDRESS;
4267 else if (attr == &dev_attr_host_ipaddress.attr)
4268 param = ISCSI_HOST_PARAM_IPADDRESS;
4269 else if (attr == &dev_attr_host_initiatorname.attr)
4270 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4271 else if (attr == &dev_attr_host_port_state.attr)
4272 param = ISCSI_HOST_PARAM_PORT_STATE;
4273 else if (attr == &dev_attr_host_port_speed.attr)
4274 param = ISCSI_HOST_PARAM_PORT_SPEED;
4275 else {
4276 WARN_ONCE(1, "Invalid host attr");
4277 return 0;
4278 }
4279
4280 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4281 }
4282
4283 static struct attribute_group iscsi_host_group = {
4284 .attrs = iscsi_host_attrs,
4285 .is_visible = iscsi_host_attr_is_visible,
4286 };
4287
4288 /* convert iscsi_port_speed values to ascii string name */
4289 static const struct {
4290 enum iscsi_port_speed value;
4291 char *name;
4292 } iscsi_port_speed_names[] = {
4293 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4294 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4295 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4296 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4297 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4298 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4299 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4300 };
4301
4302 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4303 {
4304 int i;
4305 char *speed = "Unknown!";
4306 struct iscsi_cls_host *ihost = shost->shost_data;
4307 uint32_t port_speed = ihost->port_speed;
4308
4309 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4310 if (iscsi_port_speed_names[i].value & port_speed) {
4311 speed = iscsi_port_speed_names[i].name;
4312 break;
4313 }
4314 }
4315 return speed;
4316 }
4317 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4318
4319 /* convert iscsi_port_state values to ascii string name */
4320 static const struct {
4321 enum iscsi_port_state value;
4322 char *name;
4323 } iscsi_port_state_names[] = {
4324 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4325 {ISCSI_PORT_STATE_UP, "LINK UP" },
4326 };
4327
4328 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4329 {
4330 int i;
4331 char *state = "Unknown!";
4332 struct iscsi_cls_host *ihost = shost->shost_data;
4333 uint32_t port_state = ihost->port_state;
4334
4335 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4336 if (iscsi_port_state_names[i].value & port_state) {
4337 state = iscsi_port_state_names[i].name;
4338 break;
4339 }
4340 }
4341 return state;
4342 }
4343 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4344
4345 static int iscsi_session_match(struct attribute_container *cont,
4346 struct device *dev)
4347 {
4348 struct iscsi_cls_session *session;
4349 struct Scsi_Host *shost;
4350 struct iscsi_internal *priv;
4351
4352 if (!iscsi_is_session_dev(dev))
4353 return 0;
4354
4355 session = iscsi_dev_to_session(dev);
4356 shost = iscsi_session_to_shost(session);
4357 if (!shost->transportt)
4358 return 0;
4359
4360 priv = to_iscsi_internal(shost->transportt);
4361 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4362 return 0;
4363
4364 return &priv->session_cont.ac == cont;
4365 }
4366
4367 static int iscsi_conn_match(struct attribute_container *cont,
4368 struct device *dev)
4369 {
4370 struct iscsi_cls_session *session;
4371 struct iscsi_cls_conn *conn;
4372 struct Scsi_Host *shost;
4373 struct iscsi_internal *priv;
4374
4375 if (!iscsi_is_conn_dev(dev))
4376 return 0;
4377
4378 conn = iscsi_dev_to_conn(dev);
4379 session = iscsi_dev_to_session(conn->dev.parent);
4380 shost = iscsi_session_to_shost(session);
4381
4382 if (!shost->transportt)
4383 return 0;
4384
4385 priv = to_iscsi_internal(shost->transportt);
4386 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4387 return 0;
4388
4389 return &priv->conn_cont.ac == cont;
4390 }
4391
4392 static int iscsi_host_match(struct attribute_container *cont,
4393 struct device *dev)
4394 {
4395 struct Scsi_Host *shost;
4396 struct iscsi_internal *priv;
4397
4398 if (!scsi_is_host_device(dev))
4399 return 0;
4400
4401 shost = dev_to_shost(dev);
4402 if (!shost->transportt ||
4403 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4404 return 0;
4405
4406 priv = to_iscsi_internal(shost->transportt);
4407 return &priv->t.host_attrs.ac == cont;
4408 }
4409
4410 struct scsi_transport_template *
4411 iscsi_register_transport(struct iscsi_transport *tt)
4412 {
4413 struct iscsi_internal *priv;
4414 unsigned long flags;
4415 int err;
4416
4417 BUG_ON(!tt);
4418
4419 priv = iscsi_if_transport_lookup(tt);
4420 if (priv)
4421 return NULL;
4422
4423 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4424 if (!priv)
4425 return NULL;
4426 INIT_LIST_HEAD(&priv->list);
4427 priv->iscsi_transport = tt;
4428 priv->t.user_scan = iscsi_user_scan;
4429 priv->t.create_work_queue = 1;
4430
4431 priv->dev.class = &iscsi_transport_class;
4432 dev_set_name(&priv->dev, "%s", tt->name);
4433 err = device_register(&priv->dev);
4434 if (err)
4435 goto free_priv;
4436
4437 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4438 if (err)
4439 goto unregister_dev;
4440
4441 /* host parameters */
4442 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4443 priv->t.host_attrs.ac.match = iscsi_host_match;
4444 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4445 priv->t.host_size = sizeof(struct iscsi_cls_host);
4446 transport_container_register(&priv->t.host_attrs);
4447
4448 /* connection parameters */
4449 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4450 priv->conn_cont.ac.match = iscsi_conn_match;
4451 priv->conn_cont.ac.grp = &iscsi_conn_group;
4452 transport_container_register(&priv->conn_cont);
4453
4454 /* session parameters */
4455 priv->session_cont.ac.class = &iscsi_session_class.class;
4456 priv->session_cont.ac.match = iscsi_session_match;
4457 priv->session_cont.ac.grp = &iscsi_session_group;
4458 transport_container_register(&priv->session_cont);
4459
4460 spin_lock_irqsave(&iscsi_transport_lock, flags);
4461 list_add(&priv->list, &iscsi_transports);
4462 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4463
4464 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4465 return &priv->t;
4466
4467 unregister_dev:
4468 device_unregister(&priv->dev);
4469 return NULL;
4470 free_priv:
4471 kfree(priv);
4472 return NULL;
4473 }
4474 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4475
4476 int iscsi_unregister_transport(struct iscsi_transport *tt)
4477 {
4478 struct iscsi_internal *priv;
4479 unsigned long flags;
4480
4481 BUG_ON(!tt);
4482
4483 mutex_lock(&rx_queue_mutex);
4484
4485 priv = iscsi_if_transport_lookup(tt);
4486 BUG_ON (!priv);
4487
4488 spin_lock_irqsave(&iscsi_transport_lock, flags);
4489 list_del(&priv->list);
4490 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4491
4492 transport_container_unregister(&priv->conn_cont);
4493 transport_container_unregister(&priv->session_cont);
4494 transport_container_unregister(&priv->t.host_attrs);
4495
4496 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4497 device_unregister(&priv->dev);
4498 mutex_unlock(&rx_queue_mutex);
4499
4500 return 0;
4501 }
4502 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4503
4504 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4505 struct device *dev, const char *fmt, ...)
4506 {
4507 struct va_format vaf;
4508 va_list args;
4509
4510 va_start(args, fmt);
4511 vaf.fmt = fmt;
4512 vaf.va = &args;
4513 trace(dev, &vaf);
4514 va_end(args);
4515 }
4516 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4517
4518 static __init int iscsi_transport_init(void)
4519 {
4520 int err;
4521 struct netlink_kernel_cfg cfg = {
4522 .groups = 1,
4523 .input = iscsi_if_rx,
4524 };
4525 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4526 ISCSI_TRANSPORT_VERSION);
4527
4528 atomic_set(&iscsi_session_nr, 0);
4529
4530 err = class_register(&iscsi_transport_class);
4531 if (err)
4532 return err;
4533
4534 err = class_register(&iscsi_endpoint_class);
4535 if (err)
4536 goto unregister_transport_class;
4537
4538 err = class_register(&iscsi_iface_class);
4539 if (err)
4540 goto unregister_endpoint_class;
4541
4542 err = transport_class_register(&iscsi_host_class);
4543 if (err)
4544 goto unregister_iface_class;
4545
4546 err = transport_class_register(&iscsi_connection_class);
4547 if (err)
4548 goto unregister_host_class;
4549
4550 err = transport_class_register(&iscsi_session_class);
4551 if (err)
4552 goto unregister_conn_class;
4553
4554 err = bus_register(&iscsi_flashnode_bus);
4555 if (err)
4556 goto unregister_session_class;
4557
4558 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4559 if (!nls) {
4560 err = -ENOBUFS;
4561 goto unregister_flashnode_bus;
4562 }
4563
4564 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4565 if (!iscsi_eh_timer_workq) {
4566 err = -ENOMEM;
4567 goto release_nls;
4568 }
4569
4570 return 0;
4571
4572 release_nls:
4573 netlink_kernel_release(nls);
4574 unregister_flashnode_bus:
4575 bus_unregister(&iscsi_flashnode_bus);
4576 unregister_session_class:
4577 transport_class_unregister(&iscsi_session_class);
4578 unregister_conn_class:
4579 transport_class_unregister(&iscsi_connection_class);
4580 unregister_host_class:
4581 transport_class_unregister(&iscsi_host_class);
4582 unregister_iface_class:
4583 class_unregister(&iscsi_iface_class);
4584 unregister_endpoint_class:
4585 class_unregister(&iscsi_endpoint_class);
4586 unregister_transport_class:
4587 class_unregister(&iscsi_transport_class);
4588 return err;
4589 }
4590
4591 static void __exit iscsi_transport_exit(void)
4592 {
4593 destroy_workqueue(iscsi_eh_timer_workq);
4594 netlink_kernel_release(nls);
4595 bus_unregister(&iscsi_flashnode_bus);
4596 transport_class_unregister(&iscsi_connection_class);
4597 transport_class_unregister(&iscsi_session_class);
4598 transport_class_unregister(&iscsi_host_class);
4599 class_unregister(&iscsi_endpoint_class);
4600 class_unregister(&iscsi_iface_class);
4601 class_unregister(&iscsi_transport_class);
4602 }
4603
4604 module_init(iscsi_transport_init);
4605 module_exit(iscsi_transport_exit);
4606
4607 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4608 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4609 "Alex Aizman <itn780@yahoo.com>");
4610 MODULE_DESCRIPTION("iSCSI Transport Interface");
4611 MODULE_LICENSE("GPL");
4612 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4613 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux with added FPC-III support