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Linux 4.19.133
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_iscsi.c
blob04d095488c764726efd5da82bc09ba72457e4318
1 /*
2 * iSCSI transport class definitions
3 *
4 * Copyright (C) IBM Corporation, 2004
5 * Copyright (C) Mike Christie, 2004 - 2005
6 * Copyright (C) Dmitry Yusupov, 2004 - 2005
7 * Copyright (C) Alex Aizman, 2004 - 2005
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23 #include <linux/module.h>
24 #include <linux/mutex.h>
25 #include <linux/slab.h>
26 #include <linux/bsg-lib.h>
27 #include <linux/idr.h>
28 #include <net/tcp.h>
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_iscsi.h>
34 #include <scsi/iscsi_if.h>
35 #include <scsi/scsi_cmnd.h>
36 #include <scsi/scsi_bsg_iscsi.h>
37
38 #define ISCSI_TRANSPORT_VERSION "2.0-870"
39
40 #define ISCSI_SEND_MAX_ALLOWED 10
41
42 static int dbg_session;
43 module_param_named(debug_session, dbg_session, int,
44 S_IRUGO | S_IWUSR);
45 MODULE_PARM_DESC(debug_session,
46 "Turn on debugging for sessions in scsi_transport_iscsi "
47 "module. Set to 1 to turn on, and zero to turn off. Default "
48 "is off.");
49
50 static int dbg_conn;
51 module_param_named(debug_conn, dbg_conn, int,
52 S_IRUGO | S_IWUSR);
53 MODULE_PARM_DESC(debug_conn,
54 "Turn on debugging for connections in scsi_transport_iscsi "
55 "module. Set to 1 to turn on, and zero to turn off. Default "
56 "is off.");
57
58 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
59 do { \
60 if (dbg_session) \
61 iscsi_cls_session_printk(KERN_INFO, _session, \
62 "%s: " dbg_fmt, \
63 __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 } while (0);
73
74 struct iscsi_internal {
75 struct scsi_transport_template t;
76 struct iscsi_transport *iscsi_transport;
77 struct list_head list;
78 struct device dev;
79
80 struct transport_container conn_cont;
81 struct transport_container session_cont;
82 };
83
84 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
85 static struct workqueue_struct *iscsi_eh_timer_workq;
86
87 static DEFINE_IDA(iscsi_sess_ida);
88 /*
89 * list of registered transports and lock that must
90 * be held while accessing list. The iscsi_transport_lock must
91 * be acquired after the rx_queue_mutex.
92 */
93 static LIST_HEAD(iscsi_transports);
94 static DEFINE_SPINLOCK(iscsi_transport_lock);
95
96 #define to_iscsi_internal(tmpl) \
97 container_of(tmpl, struct iscsi_internal, t)
98
99 #define dev_to_iscsi_internal(_dev) \
100 container_of(_dev, struct iscsi_internal, dev)
101
102 static void iscsi_transport_release(struct device *dev)
103 {
104 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
105 kfree(priv);
106 }
107
108 /*
109 * iscsi_transport_class represents the iscsi_transports that are
110 * registered.
111 */
112 static struct class iscsi_transport_class = {
113 .name = "iscsi_transport",
114 .dev_release = iscsi_transport_release,
115 };
116
117 static ssize_t
118 show_transport_handle(struct device *dev, struct device_attribute *attr,
119 char *buf)
120 {
121 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
122 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
123 }
124 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
125
126 #define show_transport_attr(name, format) \
127 static ssize_t \
128 show_transport_##name(struct device *dev, \
129 struct device_attribute *attr,char *buf) \
130 { \
131 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
132 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
133 } \
134 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
135
136 show_transport_attr(caps, "0x%x");
137
138 static struct attribute *iscsi_transport_attrs[] = {
139 &dev_attr_handle.attr,
140 &dev_attr_caps.attr,
141 NULL,
142 };
143
144 static struct attribute_group iscsi_transport_group = {
145 .attrs = iscsi_transport_attrs,
146 };
147
148 /*
149 * iSCSI endpoint attrs
150 */
151 #define iscsi_dev_to_endpoint(_dev) \
152 container_of(_dev, struct iscsi_endpoint, dev)
153
154 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
155 struct device_attribute dev_attr_##_prefix##_##_name = \
156 __ATTR(_name,_mode,_show,_store)
157
158 static void iscsi_endpoint_release(struct device *dev)
159 {
160 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
161 kfree(ep);
162 }
163
164 static struct class iscsi_endpoint_class = {
165 .name = "iscsi_endpoint",
166 .dev_release = iscsi_endpoint_release,
167 };
168
169 static ssize_t
170 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
171 {
172 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
173 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
174 }
175 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
176
177 static struct attribute *iscsi_endpoint_attrs[] = {
178 &dev_attr_ep_handle.attr,
179 NULL,
180 };
181
182 static struct attribute_group iscsi_endpoint_group = {
183 .attrs = iscsi_endpoint_attrs,
184 };
185
186 #define ISCSI_MAX_EPID -1
187
188 static int iscsi_match_epid(struct device *dev, const void *data)
189 {
190 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
191 const uint64_t *epid = data;
192
193 return *epid == ep->id;
194 }
195
196 struct iscsi_endpoint *
197 iscsi_create_endpoint(int dd_size)
198 {
199 struct device *dev;
200 struct iscsi_endpoint *ep;
201 uint64_t id;
202 int err;
203
204 for (id = 1; id < ISCSI_MAX_EPID; id++) {
205 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
206 iscsi_match_epid);
207 if (!dev)
208 break;
209 else
210 put_device(dev);
211 }
212 if (id == ISCSI_MAX_EPID) {
213 printk(KERN_ERR "Too many connections. Max supported %u\n",
214 ISCSI_MAX_EPID - 1);
215 return NULL;
216 }
217
218 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
219 if (!ep)
220 return NULL;
221
222 ep->id = id;
223 ep->dev.class = &iscsi_endpoint_class;
224 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
225 err = device_register(&ep->dev);
226 if (err)
227 goto free_ep;
228
229 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
230 if (err)
231 goto unregister_dev;
232
233 if (dd_size)
234 ep->dd_data = &ep[1];
235 return ep;
236
237 unregister_dev:
238 device_unregister(&ep->dev);
239 return NULL;
240
241 free_ep:
242 kfree(ep);
243 return NULL;
244 }
245 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
246
247 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
248 {
249 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
250 device_unregister(&ep->dev);
251 }
252 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
253
254 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
255 {
256 struct iscsi_endpoint *ep;
257 struct device *dev;
258
259 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
260 iscsi_match_epid);
261 if (!dev)
262 return NULL;
263
264 ep = iscsi_dev_to_endpoint(dev);
265 /*
266 * we can drop this now because the interface will prevent
267 * removals and lookups from racing.
268 */
269 put_device(dev);
270 return ep;
271 }
272 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
273
274 /*
275 * Interface to display network param to sysfs
276 */
277
278 static void iscsi_iface_release(struct device *dev)
279 {
280 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
281 struct device *parent = iface->dev.parent;
282
283 kfree(iface);
284 put_device(parent);
285 }
286
287
288 static struct class iscsi_iface_class = {
289 .name = "iscsi_iface",
290 .dev_release = iscsi_iface_release,
291 };
292
293 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
294 struct device_attribute dev_attr_##_prefix##_##_name = \
295 __ATTR(_name, _mode, _show, _store)
296
297 /* iface attrs show */
298 #define iscsi_iface_attr_show(type, name, param_type, param) \
299 static ssize_t \
300 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
301 char *buf) \
302 { \
303 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
304 struct iscsi_transport *t = iface->transport; \
305 return t->get_iface_param(iface, param_type, param, buf); \
306 } \
307
308 #define iscsi_iface_net_attr(type, name, param) \
309 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
310 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
311
312 #define iscsi_iface_attr(type, name, param) \
313 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
314 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
315
316 /* generic read only ipv4 attribute */
317 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
318 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
319 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
320 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
321 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
322 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
323 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
324 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
325 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
326 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
327 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
328 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
329 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
330 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
331 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
332 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
333 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
334 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
335 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
336 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
337 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
338 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
339 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
340 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
341 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
342 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
343 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
344 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
345 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
346
347 /* generic read only ipv6 attribute */
348 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
349 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
350 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
351 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
352 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
353 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
354 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
355 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
356 iscsi_iface_net_attr(ipv6_iface, link_local_state,
357 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
358 iscsi_iface_net_attr(ipv6_iface, router_state,
359 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
360 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
361 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
362 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
363 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
364 iscsi_iface_net_attr(ipv6_iface, traffic_class,
365 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
366 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
367 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
368 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
369 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
370 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
371 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
372 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
373 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
374 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
375 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
376 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
377
378 /* common read only iface attribute */
379 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
380 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
381 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
382 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
383 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
384 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
385 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
386 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
387 iscsi_iface_net_attr(iface, tcp_nagle_disable,
388 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
389 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
390 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
391 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
392 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
393 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
394 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
395
396 /* common iscsi specific settings attributes */
397 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
398 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
399 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
400 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
401 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
402 iscsi_iface_attr(iface, data_seq_in_order,
403 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
404 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
405 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
406 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
407 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
408 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
409 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
410 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
411 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
412 iscsi_iface_attr(iface, discovery_auth_optional,
413 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
414 iscsi_iface_attr(iface, discovery_logout,
415 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
416 iscsi_iface_attr(iface, strict_login_comp_en,
417 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
418 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
419
420 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
421 struct attribute *attr, int i)
422 {
423 struct device *dev = container_of(kobj, struct device, kobj);
424 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
425 struct iscsi_transport *t = iface->transport;
426 int param;
427 int param_type;
428
429 if (attr == &dev_attr_iface_enabled.attr)
430 param = ISCSI_NET_PARAM_IFACE_ENABLE;
431 else if (attr == &dev_attr_iface_vlan_id.attr)
432 param = ISCSI_NET_PARAM_VLAN_ID;
433 else if (attr == &dev_attr_iface_vlan_priority.attr)
434 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
435 else if (attr == &dev_attr_iface_vlan_enabled.attr)
436 param = ISCSI_NET_PARAM_VLAN_ENABLED;
437 else if (attr == &dev_attr_iface_mtu.attr)
438 param = ISCSI_NET_PARAM_MTU;
439 else if (attr == &dev_attr_iface_port.attr)
440 param = ISCSI_NET_PARAM_PORT;
441 else if (attr == &dev_attr_iface_ipaddress_state.attr)
442 param = ISCSI_NET_PARAM_IPADDR_STATE;
443 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
444 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
445 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
446 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
447 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
448 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
449 else if (attr == &dev_attr_iface_tcp_wsf.attr)
450 param = ISCSI_NET_PARAM_TCP_WSF;
451 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
452 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
453 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
454 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
455 else if (attr == &dev_attr_iface_cache_id.attr)
456 param = ISCSI_NET_PARAM_CACHE_ID;
457 else if (attr == &dev_attr_iface_redirect_en.attr)
458 param = ISCSI_NET_PARAM_REDIRECT_EN;
459 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
460 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
461 else if (attr == &dev_attr_iface_header_digest.attr)
462 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
463 else if (attr == &dev_attr_iface_data_digest.attr)
464 param = ISCSI_IFACE_PARAM_DATADGST_EN;
465 else if (attr == &dev_attr_iface_immediate_data.attr)
466 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
467 else if (attr == &dev_attr_iface_initial_r2t.attr)
468 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
469 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
470 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
471 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
472 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
473 else if (attr == &dev_attr_iface_erl.attr)
474 param = ISCSI_IFACE_PARAM_ERL;
475 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
476 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
477 else if (attr == &dev_attr_iface_first_burst_len.attr)
478 param = ISCSI_IFACE_PARAM_FIRST_BURST;
479 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
480 param = ISCSI_IFACE_PARAM_MAX_R2T;
481 else if (attr == &dev_attr_iface_max_burst_len.attr)
482 param = ISCSI_IFACE_PARAM_MAX_BURST;
483 else if (attr == &dev_attr_iface_chap_auth.attr)
484 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
485 else if (attr == &dev_attr_iface_bidi_chap.attr)
486 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
487 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
488 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
489 else if (attr == &dev_attr_iface_discovery_logout.attr)
490 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
491 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
492 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
493 else if (attr == &dev_attr_iface_initiator_name.attr)
494 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
495 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
496 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
497 param = ISCSI_NET_PARAM_IPV4_ADDR;
498 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
499 param = ISCSI_NET_PARAM_IPV4_GW;
500 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
501 param = ISCSI_NET_PARAM_IPV4_SUBNET;
502 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
503 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
504 else if (attr ==
505 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
506 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
507 else if (attr ==
508 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
509 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
510 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
511 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
512 else if (attr == &dev_attr_ipv4_iface_tos.attr)
513 param = ISCSI_NET_PARAM_IPV4_TOS;
514 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
515 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
516 else if (attr ==
517 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
518 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
519 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
520 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
521 else if (attr ==
522 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
523 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
524 else if (attr ==
525 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
526 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
527 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
528 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
529 else if (attr ==
530 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
531 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
532 else if (attr ==
533 &dev_attr_ipv4_iface_fragment_disable.attr)
534 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
535 else if (attr ==
536 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
537 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
538 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
539 param = ISCSI_NET_PARAM_IPV4_TTL;
540 else
541 return 0;
542 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
543 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
544 param = ISCSI_NET_PARAM_IPV6_ADDR;
545 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
546 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
547 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
548 param = ISCSI_NET_PARAM_IPV6_ROUTER;
549 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
550 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
551 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
552 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
553 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
554 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
555 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
556 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
557 else if (attr ==
558 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
559 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
560 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
561 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
562 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
563 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
564 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
565 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
566 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
567 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
568 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
569 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
570 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
571 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
572 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
573 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
574 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
575 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
576 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
577 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
578 else
579 return 0;
580 } else {
581 WARN_ONCE(1, "Invalid iface attr");
582 return 0;
583 }
584
585 switch (param) {
586 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
587 case ISCSI_IFACE_PARAM_HDRDGST_EN:
588 case ISCSI_IFACE_PARAM_DATADGST_EN:
589 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
590 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
591 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
592 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
593 case ISCSI_IFACE_PARAM_ERL:
594 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
595 case ISCSI_IFACE_PARAM_FIRST_BURST:
596 case ISCSI_IFACE_PARAM_MAX_R2T:
597 case ISCSI_IFACE_PARAM_MAX_BURST:
598 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
599 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
600 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
601 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
602 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
603 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
604 param_type = ISCSI_IFACE_PARAM;
605 break;
606 default:
607 param_type = ISCSI_NET_PARAM;
608 }
609
610 return t->attr_is_visible(param_type, param);
611 }
612
613 static struct attribute *iscsi_iface_attrs[] = {
614 &dev_attr_iface_enabled.attr,
615 &dev_attr_iface_vlan_id.attr,
616 &dev_attr_iface_vlan_priority.attr,
617 &dev_attr_iface_vlan_enabled.attr,
618 &dev_attr_ipv4_iface_ipaddress.attr,
619 &dev_attr_ipv4_iface_gateway.attr,
620 &dev_attr_ipv4_iface_subnet.attr,
621 &dev_attr_ipv4_iface_bootproto.attr,
622 &dev_attr_ipv6_iface_ipaddress.attr,
623 &dev_attr_ipv6_iface_link_local_addr.attr,
624 &dev_attr_ipv6_iface_router_addr.attr,
625 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
626 &dev_attr_ipv6_iface_link_local_autocfg.attr,
627 &dev_attr_iface_mtu.attr,
628 &dev_attr_iface_port.attr,
629 &dev_attr_iface_ipaddress_state.attr,
630 &dev_attr_iface_delayed_ack_en.attr,
631 &dev_attr_iface_tcp_nagle_disable.attr,
632 &dev_attr_iface_tcp_wsf_disable.attr,
633 &dev_attr_iface_tcp_wsf.attr,
634 &dev_attr_iface_tcp_timer_scale.attr,
635 &dev_attr_iface_tcp_timestamp_en.attr,
636 &dev_attr_iface_cache_id.attr,
637 &dev_attr_iface_redirect_en.attr,
638 &dev_attr_iface_def_taskmgmt_tmo.attr,
639 &dev_attr_iface_header_digest.attr,
640 &dev_attr_iface_data_digest.attr,
641 &dev_attr_iface_immediate_data.attr,
642 &dev_attr_iface_initial_r2t.attr,
643 &dev_attr_iface_data_seq_in_order.attr,
644 &dev_attr_iface_data_pdu_in_order.attr,
645 &dev_attr_iface_erl.attr,
646 &dev_attr_iface_max_recv_dlength.attr,
647 &dev_attr_iface_first_burst_len.attr,
648 &dev_attr_iface_max_outstanding_r2t.attr,
649 &dev_attr_iface_max_burst_len.attr,
650 &dev_attr_iface_chap_auth.attr,
651 &dev_attr_iface_bidi_chap.attr,
652 &dev_attr_iface_discovery_auth_optional.attr,
653 &dev_attr_iface_discovery_logout.attr,
654 &dev_attr_iface_strict_login_comp_en.attr,
655 &dev_attr_iface_initiator_name.attr,
656 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
657 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
658 &dev_attr_ipv4_iface_tos_en.attr,
659 &dev_attr_ipv4_iface_tos.attr,
660 &dev_attr_ipv4_iface_grat_arp_en.attr,
661 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
662 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
663 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
664 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
665 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
666 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
667 &dev_attr_ipv4_iface_fragment_disable.attr,
668 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
669 &dev_attr_ipv4_iface_ttl.attr,
670 &dev_attr_ipv6_iface_link_local_state.attr,
671 &dev_attr_ipv6_iface_router_state.attr,
672 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
673 &dev_attr_ipv6_iface_mld_en.attr,
674 &dev_attr_ipv6_iface_flow_label.attr,
675 &dev_attr_ipv6_iface_traffic_class.attr,
676 &dev_attr_ipv6_iface_hop_limit.attr,
677 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
678 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
679 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
680 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
681 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
682 NULL,
683 };
684
685 static struct attribute_group iscsi_iface_group = {
686 .attrs = iscsi_iface_attrs,
687 .is_visible = iscsi_iface_attr_is_visible,
688 };
689
690 /* convert iscsi_ipaddress_state values to ascii string name */
691 static const struct {
692 enum iscsi_ipaddress_state value;
693 char *name;
694 } iscsi_ipaddress_state_names[] = {
695 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
696 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
697 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
698 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
699 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
700 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
701 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
702 };
703
704 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
705 {
706 int i;
707 char *state = NULL;
708
709 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
710 if (iscsi_ipaddress_state_names[i].value == port_state) {
711 state = iscsi_ipaddress_state_names[i].name;
712 break;
713 }
714 }
715 return state;
716 }
717 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
718
719 /* convert iscsi_router_state values to ascii string name */
720 static const struct {
721 enum iscsi_router_state value;
722 char *name;
723 } iscsi_router_state_names[] = {
724 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
725 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
726 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
727 {ISCSI_ROUTER_STATE_STALE, "Stale" },
728 };
729
730 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
731 {
732 int i;
733 char *state = NULL;
734
735 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
736 if (iscsi_router_state_names[i].value == router_state) {
737 state = iscsi_router_state_names[i].name;
738 break;
739 }
740 }
741 return state;
742 }
743 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
744
745 struct iscsi_iface *
746 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
747 uint32_t iface_type, uint32_t iface_num, int dd_size)
748 {
749 struct iscsi_iface *iface;
750 int err;
751
752 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
753 if (!iface)
754 return NULL;
755
756 iface->transport = transport;
757 iface->iface_type = iface_type;
758 iface->iface_num = iface_num;
759 iface->dev.release = iscsi_iface_release;
760 iface->dev.class = &iscsi_iface_class;
761 /* parent reference released in iscsi_iface_release */
762 iface->dev.parent = get_device(&shost->shost_gendev);
763 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
764 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
765 iface_num);
766 else
767 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
768 iface_num);
769
770 err = device_register(&iface->dev);
771 if (err)
772 goto free_iface;
773
774 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
775 if (err)
776 goto unreg_iface;
777
778 if (dd_size)
779 iface->dd_data = &iface[1];
780 return iface;
781
782 unreg_iface:
783 device_unregister(&iface->dev);
784 return NULL;
785
786 free_iface:
787 put_device(iface->dev.parent);
788 kfree(iface);
789 return NULL;
790 }
791 EXPORT_SYMBOL_GPL(iscsi_create_iface);
792
793 void iscsi_destroy_iface(struct iscsi_iface *iface)
794 {
795 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
796 device_unregister(&iface->dev);
797 }
798 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
799
800 /*
801 * Interface to display flash node params to sysfs
802 */
803
804 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
805 struct device_attribute dev_attr_##_prefix##_##_name = \
806 __ATTR(_name, _mode, _show, _store)
807
808 /* flash node session attrs show */
809 #define iscsi_flashnode_sess_attr_show(type, name, param) \
810 static ssize_t \
811 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
812 char *buf) \
813 { \
814 struct iscsi_bus_flash_session *fnode_sess = \
815 iscsi_dev_to_flash_session(dev);\
816 struct iscsi_transport *t = fnode_sess->transport; \
817 return t->get_flashnode_param(fnode_sess, param, buf); \
818 } \
819
820
821 #define iscsi_flashnode_sess_attr(type, name, param) \
822 iscsi_flashnode_sess_attr_show(type, name, param) \
823 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
824 show_##type##_##name, NULL);
825
826 /* Flash node session attributes */
827
828 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
829 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
830 iscsi_flashnode_sess_attr(fnode, discovery_session,
831 ISCSI_FLASHNODE_DISCOVERY_SESS);
832 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
833 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
834 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
835 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
836 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
837 ISCSI_FLASHNODE_DATASEQ_INORDER);
838 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
839 ISCSI_FLASHNODE_PDU_INORDER);
840 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
841 iscsi_flashnode_sess_attr(fnode, discovery_logout,
842 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
843 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
844 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
845 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
846 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
847 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
848 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
849 iscsi_flashnode_sess_attr(fnode, def_time2retain,
850 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
851 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
852 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
853 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
854 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
855 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
856 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
857 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
858 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
859 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
860 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
861 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
862 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
863 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
864 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
865 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
866 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
867 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
868 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
869 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
870 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
871
872 static struct attribute *iscsi_flashnode_sess_attrs[] = {
873 &dev_attr_fnode_auto_snd_tgt_disable.attr,
874 &dev_attr_fnode_discovery_session.attr,
875 &dev_attr_fnode_portal_type.attr,
876 &dev_attr_fnode_entry_enable.attr,
877 &dev_attr_fnode_immediate_data.attr,
878 &dev_attr_fnode_initial_r2t.attr,
879 &dev_attr_fnode_data_seq_in_order.attr,
880 &dev_attr_fnode_data_pdu_in_order.attr,
881 &dev_attr_fnode_chap_auth.attr,
882 &dev_attr_fnode_discovery_logout.attr,
883 &dev_attr_fnode_bidi_chap.attr,
884 &dev_attr_fnode_discovery_auth_optional.attr,
885 &dev_attr_fnode_erl.attr,
886 &dev_attr_fnode_first_burst_len.attr,
887 &dev_attr_fnode_def_time2wait.attr,
888 &dev_attr_fnode_def_time2retain.attr,
889 &dev_attr_fnode_max_outstanding_r2t.attr,
890 &dev_attr_fnode_isid.attr,
891 &dev_attr_fnode_tsid.attr,
892 &dev_attr_fnode_max_burst_len.attr,
893 &dev_attr_fnode_def_taskmgmt_tmo.attr,
894 &dev_attr_fnode_targetalias.attr,
895 &dev_attr_fnode_targetname.attr,
896 &dev_attr_fnode_tpgt.attr,
897 &dev_attr_fnode_discovery_parent_idx.attr,
898 &dev_attr_fnode_discovery_parent_type.attr,
899 &dev_attr_fnode_chap_in_idx.attr,
900 &dev_attr_fnode_chap_out_idx.attr,
901 &dev_attr_fnode_username.attr,
902 &dev_attr_fnode_username_in.attr,
903 &dev_attr_fnode_password.attr,
904 &dev_attr_fnode_password_in.attr,
905 &dev_attr_fnode_is_boot_target.attr,
906 NULL,
907 };
908
909 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
910 struct attribute *attr,
911 int i)
912 {
913 struct device *dev = container_of(kobj, struct device, kobj);
914 struct iscsi_bus_flash_session *fnode_sess =
915 iscsi_dev_to_flash_session(dev);
916 struct iscsi_transport *t = fnode_sess->transport;
917 int param;
918
919 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
920 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
921 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
922 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
923 } else if (attr == &dev_attr_fnode_portal_type.attr) {
924 param = ISCSI_FLASHNODE_PORTAL_TYPE;
925 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
926 param = ISCSI_FLASHNODE_ENTRY_EN;
927 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
928 param = ISCSI_FLASHNODE_IMM_DATA_EN;
929 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
930 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
931 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
932 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
933 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
934 param = ISCSI_FLASHNODE_PDU_INORDER;
935 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
936 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
937 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
938 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
939 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
940 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
941 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
942 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
943 } else if (attr == &dev_attr_fnode_erl.attr) {
944 param = ISCSI_FLASHNODE_ERL;
945 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
946 param = ISCSI_FLASHNODE_FIRST_BURST;
947 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
948 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
949 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
950 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
951 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
952 param = ISCSI_FLASHNODE_MAX_R2T;
953 } else if (attr == &dev_attr_fnode_isid.attr) {
954 param = ISCSI_FLASHNODE_ISID;
955 } else if (attr == &dev_attr_fnode_tsid.attr) {
956 param = ISCSI_FLASHNODE_TSID;
957 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
958 param = ISCSI_FLASHNODE_MAX_BURST;
959 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
960 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
961 } else if (attr == &dev_attr_fnode_targetalias.attr) {
962 param = ISCSI_FLASHNODE_ALIAS;
963 } else if (attr == &dev_attr_fnode_targetname.attr) {
964 param = ISCSI_FLASHNODE_NAME;
965 } else if (attr == &dev_attr_fnode_tpgt.attr) {
966 param = ISCSI_FLASHNODE_TPGT;
967 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
968 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
969 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
970 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
971 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
972 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
973 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
974 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
975 } else if (attr == &dev_attr_fnode_username.attr) {
976 param = ISCSI_FLASHNODE_USERNAME;
977 } else if (attr == &dev_attr_fnode_username_in.attr) {
978 param = ISCSI_FLASHNODE_USERNAME_IN;
979 } else if (attr == &dev_attr_fnode_password.attr) {
980 param = ISCSI_FLASHNODE_PASSWORD;
981 } else if (attr == &dev_attr_fnode_password_in.attr) {
982 param = ISCSI_FLASHNODE_PASSWORD_IN;
983 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
984 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
985 } else {
986 WARN_ONCE(1, "Invalid flashnode session attr");
987 return 0;
988 }
989
990 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
991 }
992
993 static struct attribute_group iscsi_flashnode_sess_attr_group = {
994 .attrs = iscsi_flashnode_sess_attrs,
995 .is_visible = iscsi_flashnode_sess_attr_is_visible,
996 };
997
998 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
999 &iscsi_flashnode_sess_attr_group,
1000 NULL,
1001 };
1002
1003 static void iscsi_flashnode_sess_release(struct device *dev)
1004 {
1005 struct iscsi_bus_flash_session *fnode_sess =
1006 iscsi_dev_to_flash_session(dev);
1007
1008 kfree(fnode_sess->targetname);
1009 kfree(fnode_sess->targetalias);
1010 kfree(fnode_sess->portal_type);
1011 kfree(fnode_sess);
1012 }
1013
1014 static const struct device_type iscsi_flashnode_sess_dev_type = {
1015 .name = "iscsi_flashnode_sess_dev_type",
1016 .groups = iscsi_flashnode_sess_attr_groups,
1017 .release = iscsi_flashnode_sess_release,
1018 };
1019
1020 /* flash node connection attrs show */
1021 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1022 static ssize_t \
1023 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1024 char *buf) \
1025 { \
1026 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1027 struct iscsi_bus_flash_session *fnode_sess = \
1028 iscsi_flash_conn_to_flash_session(fnode_conn);\
1029 struct iscsi_transport *t = fnode_conn->transport; \
1030 return t->get_flashnode_param(fnode_sess, param, buf); \
1031 } \
1032
1033
1034 #define iscsi_flashnode_conn_attr(type, name, param) \
1035 iscsi_flashnode_conn_attr_show(type, name, param) \
1036 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1037 show_##type##_##name, NULL);
1038
1039 /* Flash node connection attributes */
1040
1041 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1042 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1043 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1044 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1045 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1046 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1047 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1048 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1049 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1050 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1051 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1052 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1053 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1054 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1055 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1056 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1057 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1058 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1059 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1060 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1061 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1062 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1063 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1064 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1065 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1066 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1067 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1068 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1069 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1070 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1071 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1072 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1073 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1074 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1075 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1076 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1077 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1078 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1079 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1080
1081 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1082 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1083 &dev_attr_fnode_header_digest.attr,
1084 &dev_attr_fnode_data_digest.attr,
1085 &dev_attr_fnode_snack_req.attr,
1086 &dev_attr_fnode_tcp_timestamp_stat.attr,
1087 &dev_attr_fnode_tcp_nagle_disable.attr,
1088 &dev_attr_fnode_tcp_wsf_disable.attr,
1089 &dev_attr_fnode_tcp_timer_scale.attr,
1090 &dev_attr_fnode_tcp_timestamp_enable.attr,
1091 &dev_attr_fnode_fragment_disable.attr,
1092 &dev_attr_fnode_max_recv_dlength.attr,
1093 &dev_attr_fnode_max_xmit_dlength.attr,
1094 &dev_attr_fnode_keepalive_tmo.attr,
1095 &dev_attr_fnode_port.attr,
1096 &dev_attr_fnode_ipaddress.attr,
1097 &dev_attr_fnode_redirect_ipaddr.attr,
1098 &dev_attr_fnode_max_segment_size.attr,
1099 &dev_attr_fnode_local_port.attr,
1100 &dev_attr_fnode_ipv4_tos.attr,
1101 &dev_attr_fnode_ipv6_traffic_class.attr,
1102 &dev_attr_fnode_ipv6_flow_label.attr,
1103 &dev_attr_fnode_link_local_ipv6.attr,
1104 &dev_attr_fnode_tcp_xmit_wsf.attr,
1105 &dev_attr_fnode_tcp_recv_wsf.attr,
1106 &dev_attr_fnode_statsn.attr,
1107 &dev_attr_fnode_exp_statsn.attr,
1108 NULL,
1109 };
1110
1111 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1112 struct attribute *attr,
1113 int i)
1114 {
1115 struct device *dev = container_of(kobj, struct device, kobj);
1116 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1117 struct iscsi_transport *t = fnode_conn->transport;
1118 int param;
1119
1120 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1121 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1122 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1123 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1124 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1125 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1126 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1127 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1128 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1129 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1130 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1131 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1132 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1133 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1134 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1135 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1136 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1137 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1138 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1139 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1140 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1141 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1142 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1143 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1144 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1145 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1146 } else if (attr == &dev_attr_fnode_port.attr) {
1147 param = ISCSI_FLASHNODE_PORT;
1148 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1149 param = ISCSI_FLASHNODE_IPADDR;
1150 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1151 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1152 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1153 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1154 } else if (attr == &dev_attr_fnode_local_port.attr) {
1155 param = ISCSI_FLASHNODE_LOCAL_PORT;
1156 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1157 param = ISCSI_FLASHNODE_IPV4_TOS;
1158 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1159 param = ISCSI_FLASHNODE_IPV6_TC;
1160 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1161 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1162 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1163 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1164 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1165 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1166 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1167 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1168 } else if (attr == &dev_attr_fnode_statsn.attr) {
1169 param = ISCSI_FLASHNODE_STATSN;
1170 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1171 param = ISCSI_FLASHNODE_EXP_STATSN;
1172 } else {
1173 WARN_ONCE(1, "Invalid flashnode connection attr");
1174 return 0;
1175 }
1176
1177 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1178 }
1179
1180 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1181 .attrs = iscsi_flashnode_conn_attrs,
1182 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1183 };
1184
1185 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1186 &iscsi_flashnode_conn_attr_group,
1187 NULL,
1188 };
1189
1190 static void iscsi_flashnode_conn_release(struct device *dev)
1191 {
1192 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1193
1194 kfree(fnode_conn->ipaddress);
1195 kfree(fnode_conn->redirect_ipaddr);
1196 kfree(fnode_conn->link_local_ipv6_addr);
1197 kfree(fnode_conn);
1198 }
1199
1200 static const struct device_type iscsi_flashnode_conn_dev_type = {
1201 .name = "iscsi_flashnode_conn_dev_type",
1202 .groups = iscsi_flashnode_conn_attr_groups,
1203 .release = iscsi_flashnode_conn_release,
1204 };
1205
1206 static struct bus_type iscsi_flashnode_bus;
1207
1208 int iscsi_flashnode_bus_match(struct device *dev,
1209 struct device_driver *drv)
1210 {
1211 if (dev->bus == &iscsi_flashnode_bus)
1212 return 1;
1213 return 0;
1214 }
1215 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1216
1217 static struct bus_type iscsi_flashnode_bus = {
1218 .name = "iscsi_flashnode",
1219 .match = &iscsi_flashnode_bus_match,
1220 };
1221
1222 /**
1223 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1224 * @shost: pointer to host data
1225 * @index: index of flashnode to add in sysfs
1226 * @transport: pointer to transport data
1227 * @dd_size: total size to allocate
1228 *
1229 * Adds a sysfs entry for the flashnode session attributes
1230 *
1231 * Returns:
1232 * pointer to allocated flashnode sess on success
1233 * %NULL on failure
1234 */
1235 struct iscsi_bus_flash_session *
1236 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1237 struct iscsi_transport *transport,
1238 int dd_size)
1239 {
1240 struct iscsi_bus_flash_session *fnode_sess;
1241 int err;
1242
1243 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1244 if (!fnode_sess)
1245 return NULL;
1246
1247 fnode_sess->transport = transport;
1248 fnode_sess->target_id = index;
1249 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1250 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1251 fnode_sess->dev.parent = &shost->shost_gendev;
1252 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1253 shost->host_no, index);
1254
1255 err = device_register(&fnode_sess->dev);
1256 if (err)
1257 goto free_fnode_sess;
1258
1259 if (dd_size)
1260 fnode_sess->dd_data = &fnode_sess[1];
1261
1262 return fnode_sess;
1263
1264 free_fnode_sess:
1265 kfree(fnode_sess);
1266 return NULL;
1267 }
1268 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1269
1270 /**
1271 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1272 * @shost: pointer to host data
1273 * @fnode_sess: pointer to the parent flashnode session entry
1274 * @transport: pointer to transport data
1275 * @dd_size: total size to allocate
1276 *
1277 * Adds a sysfs entry for the flashnode connection attributes
1278 *
1279 * Returns:
1280 * pointer to allocated flashnode conn on success
1281 * %NULL on failure
1282 */
1283 struct iscsi_bus_flash_conn *
1284 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1285 struct iscsi_bus_flash_session *fnode_sess,
1286 struct iscsi_transport *transport,
1287 int dd_size)
1288 {
1289 struct iscsi_bus_flash_conn *fnode_conn;
1290 int err;
1291
1292 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1293 if (!fnode_conn)
1294 return NULL;
1295
1296 fnode_conn->transport = transport;
1297 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1298 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1299 fnode_conn->dev.parent = &fnode_sess->dev;
1300 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1301 shost->host_no, fnode_sess->target_id);
1302
1303 err = device_register(&fnode_conn->dev);
1304 if (err)
1305 goto free_fnode_conn;
1306
1307 if (dd_size)
1308 fnode_conn->dd_data = &fnode_conn[1];
1309
1310 return fnode_conn;
1311
1312 free_fnode_conn:
1313 kfree(fnode_conn);
1314 return NULL;
1315 }
1316 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1317
1318 /**
1319 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1320 * @dev: device to verify
1321 * @data: pointer to data containing value to use for verification
1322 *
1323 * Verifies if the passed device is flashnode conn device
1324 *
1325 * Returns:
1326 * 1 on success
1327 * 0 on failure
1328 */
1329 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1330 {
1331 return dev->bus == &iscsi_flashnode_bus;
1332 }
1333
1334 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1335 {
1336 device_unregister(&fnode_conn->dev);
1337 return 0;
1338 }
1339
1340 static int flashnode_match_index(struct device *dev, void *data)
1341 {
1342 struct iscsi_bus_flash_session *fnode_sess = NULL;
1343 int ret = 0;
1344
1345 if (!iscsi_flashnode_bus_match(dev, NULL))
1346 goto exit_match_index;
1347
1348 fnode_sess = iscsi_dev_to_flash_session(dev);
1349 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1350
1351 exit_match_index:
1352 return ret;
1353 }
1354
1355 /**
1356 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1357 * @shost: pointer to host data
1358 * @idx: index to match
1359 *
1360 * Finds the flashnode session object for the passed index
1361 *
1362 * Returns:
1363 * pointer to found flashnode session object on success
1364 * %NULL on failure
1365 */
1366 static struct iscsi_bus_flash_session *
1367 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1368 {
1369 struct iscsi_bus_flash_session *fnode_sess = NULL;
1370 struct device *dev;
1371
1372 dev = device_find_child(&shost->shost_gendev, &idx,
1373 flashnode_match_index);
1374 if (dev)
1375 fnode_sess = iscsi_dev_to_flash_session(dev);
1376
1377 return fnode_sess;
1378 }
1379
1380 /**
1381 * iscsi_find_flashnode_sess - finds flashnode session entry
1382 * @shost: pointer to host data
1383 * @data: pointer to data containing value to use for comparison
1384 * @fn: function pointer that does actual comparison
1385 *
1386 * Finds the flashnode session object comparing the data passed using logic
1387 * defined in passed function pointer
1388 *
1389 * Returns:
1390 * pointer to found flashnode session device object on success
1391 * %NULL on failure
1392 */
1393 struct device *
1394 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1395 int (*fn)(struct device *dev, void *data))
1396 {
1397 return device_find_child(&shost->shost_gendev, data, fn);
1398 }
1399 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1400
1401 /**
1402 * iscsi_find_flashnode_conn - finds flashnode connection entry
1403 * @fnode_sess: pointer to parent flashnode session entry
1404 *
1405 * Finds the flashnode connection object comparing the data passed using logic
1406 * defined in passed function pointer
1407 *
1408 * Returns:
1409 * pointer to found flashnode connection device object on success
1410 * %NULL on failure
1411 */
1412 struct device *
1413 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1414 {
1415 return device_find_child(&fnode_sess->dev, NULL,
1416 iscsi_is_flashnode_conn_dev);
1417 }
1418 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1419
1420 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1421 {
1422 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1423 return 0;
1424
1425 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1426 }
1427
1428 /**
1429 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1430 * @fnode_sess: pointer to flashnode session entry to be destroyed
1431 *
1432 * Deletes the flashnode session entry and all children flashnode connection
1433 * entries from sysfs
1434 */
1435 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1436 {
1437 int err;
1438
1439 err = device_for_each_child(&fnode_sess->dev, NULL,
1440 iscsi_iter_destroy_flashnode_conn_fn);
1441 if (err)
1442 pr_err("Could not delete all connections for %s. Error %d.\n",
1443 fnode_sess->dev.kobj.name, err);
1444
1445 device_unregister(&fnode_sess->dev);
1446 }
1447 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1448
1449 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1450 {
1451 if (!iscsi_flashnode_bus_match(dev, NULL))
1452 return 0;
1453
1454 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1455 return 0;
1456 }
1457
1458 /**
1459 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1460 * @shost: pointer to host data
1461 *
1462 * Destroys all the flashnode session entries and all corresponding children
1463 * flashnode connection entries from sysfs
1464 */
1465 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1466 {
1467 device_for_each_child(&shost->shost_gendev, NULL,
1468 iscsi_iter_destroy_flashnode_fn);
1469 }
1470 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1471
1472 /*
1473 * BSG support
1474 */
1475 /**
1476 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1477 * @job: bsg job to be processed
1478 */
1479 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1480 {
1481 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1482 struct iscsi_bsg_request *req = job->request;
1483 struct iscsi_bsg_reply *reply = job->reply;
1484 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1485 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1486 int ret;
1487
1488 /* check if we have the msgcode value at least */
1489 if (job->request_len < sizeof(uint32_t)) {
1490 ret = -ENOMSG;
1491 goto fail_host_msg;
1492 }
1493
1494 /* Validate the host command */
1495 switch (req->msgcode) {
1496 case ISCSI_BSG_HST_VENDOR:
1497 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1498 if ((shost->hostt->vendor_id == 0L) ||
1499 (req->rqst_data.h_vendor.vendor_id !=
1500 shost->hostt->vendor_id)) {
1501 ret = -ESRCH;
1502 goto fail_host_msg;
1503 }
1504 break;
1505 default:
1506 ret = -EBADR;
1507 goto fail_host_msg;
1508 }
1509
1510 /* check if we really have all the request data needed */
1511 if (job->request_len < cmdlen) {
1512 ret = -ENOMSG;
1513 goto fail_host_msg;
1514 }
1515
1516 ret = i->iscsi_transport->bsg_request(job);
1517 if (!ret)
1518 return 0;
1519
1520 fail_host_msg:
1521 /* return the errno failure code as the only status */
1522 BUG_ON(job->reply_len < sizeof(uint32_t));
1523 reply->reply_payload_rcv_len = 0;
1524 reply->result = ret;
1525 job->reply_len = sizeof(uint32_t);
1526 bsg_job_done(job, ret, 0);
1527 return 0;
1528 }
1529
1530 /**
1531 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1532 * @shost: shost for iscsi_host
1533 * @ihost: iscsi_cls_host adding the structures to
1534 */
1535 static int
1536 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1537 {
1538 struct device *dev = &shost->shost_gendev;
1539 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1540 struct request_queue *q;
1541 char bsg_name[20];
1542
1543 if (!i->iscsi_transport->bsg_request)
1544 return -ENOTSUPP;
1545
1546 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1547 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, 0);
1548 if (IS_ERR(q)) {
1549 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1550 "initialize - no request queue\n");
1551 return PTR_ERR(q);
1552 }
1553 __scsi_init_queue(shost, q);
1554
1555 ihost->bsg_q = q;
1556 return 0;
1557 }
1558
1559 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1560 struct device *cdev)
1561 {
1562 struct Scsi_Host *shost = dev_to_shost(dev);
1563 struct iscsi_cls_host *ihost = shost->shost_data;
1564
1565 memset(ihost, 0, sizeof(*ihost));
1566 atomic_set(&ihost->nr_scans, 0);
1567 mutex_init(&ihost->mutex);
1568
1569 iscsi_bsg_host_add(shost, ihost);
1570 /* ignore any bsg add error - we just can't do sgio */
1571
1572 return 0;
1573 }
1574
1575 static int iscsi_remove_host(struct transport_container *tc,
1576 struct device *dev, struct device *cdev)
1577 {
1578 struct Scsi_Host *shost = dev_to_shost(dev);
1579 struct iscsi_cls_host *ihost = shost->shost_data;
1580
1581 if (ihost->bsg_q) {
1582 bsg_unregister_queue(ihost->bsg_q);
1583 blk_cleanup_queue(ihost->bsg_q);
1584 }
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 goto unbind_session_exit;
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
2026 unbind_session_exit:
2027 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2028 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2029 }
2030
2031 struct iscsi_cls_session *
2032 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2033 int dd_size)
2034 {
2035 struct iscsi_cls_session *session;
2036
2037 session = kzalloc(sizeof(*session) + dd_size,
2038 GFP_KERNEL);
2039 if (!session)
2040 return NULL;
2041
2042 session->transport = transport;
2043 session->creator = -1;
2044 session->recovery_tmo = 120;
2045 session->recovery_tmo_sysfs_override = false;
2046 session->state = ISCSI_SESSION_FREE;
2047 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2048 INIT_LIST_HEAD(&session->sess_list);
2049 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2050 INIT_WORK(&session->block_work, __iscsi_block_session);
2051 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2052 INIT_WORK(&session->scan_work, iscsi_scan_session);
2053 spin_lock_init(&session->lock);
2054
2055 /* this is released in the dev's release function */
2056 scsi_host_get(shost);
2057 session->dev.parent = &shost->shost_gendev;
2058 session->dev.release = iscsi_session_release;
2059 device_initialize(&session->dev);
2060 if (dd_size)
2061 session->dd_data = &session[1];
2062
2063 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2064 return session;
2065 }
2066 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2067
2068 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2069 {
2070 unsigned long flags;
2071 int id = 0;
2072 int err;
2073
2074 session->sid = atomic_add_return(1, &iscsi_session_nr);
2075
2076 if (target_id == ISCSI_MAX_TARGET) {
2077 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2078
2079 if (id < 0) {
2080 iscsi_cls_session_printk(KERN_ERR, session,
2081 "Failure in Target ID Allocation\n");
2082 return id;
2083 }
2084 session->target_id = (unsigned int)id;
2085 session->ida_used = true;
2086 } else
2087 session->target_id = target_id;
2088
2089 dev_set_name(&session->dev, "session%u", session->sid);
2090 err = device_add(&session->dev);
2091 if (err) {
2092 iscsi_cls_session_printk(KERN_ERR, session,
2093 "could not register session's dev\n");
2094 goto release_ida;
2095 }
2096 transport_register_device(&session->dev);
2097
2098 spin_lock_irqsave(&sesslock, flags);
2099 list_add(&session->sess_list, &sesslist);
2100 spin_unlock_irqrestore(&sesslock, flags);
2101
2102 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2103 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2104 return 0;
2105
2106 release_ida:
2107 if (session->ida_used)
2108 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2109
2110 return err;
2111 }
2112 EXPORT_SYMBOL_GPL(iscsi_add_session);
2113
2114 /**
2115 * iscsi_create_session - create iscsi class session
2116 * @shost: scsi host
2117 * @transport: iscsi transport
2118 * @dd_size: private driver data size
2119 * @target_id: which target
2120 *
2121 * This can be called from a LLD or iscsi_transport.
2122 */
2123 struct iscsi_cls_session *
2124 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2125 int dd_size, unsigned int target_id)
2126 {
2127 struct iscsi_cls_session *session;
2128
2129 session = iscsi_alloc_session(shost, transport, dd_size);
2130 if (!session)
2131 return NULL;
2132
2133 if (iscsi_add_session(session, target_id)) {
2134 iscsi_free_session(session);
2135 return NULL;
2136 }
2137 return session;
2138 }
2139 EXPORT_SYMBOL_GPL(iscsi_create_session);
2140
2141 static void iscsi_conn_release(struct device *dev)
2142 {
2143 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2144 struct device *parent = conn->dev.parent;
2145
2146 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2147 kfree(conn);
2148 put_device(parent);
2149 }
2150
2151 static int iscsi_is_conn_dev(const struct device *dev)
2152 {
2153 return dev->release == iscsi_conn_release;
2154 }
2155
2156 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2157 {
2158 if (!iscsi_is_conn_dev(dev))
2159 return 0;
2160 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2161 }
2162
2163 void iscsi_remove_session(struct iscsi_cls_session *session)
2164 {
2165 unsigned long flags;
2166 int err;
2167
2168 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2169
2170 spin_lock_irqsave(&sesslock, flags);
2171 list_del(&session->sess_list);
2172 spin_unlock_irqrestore(&sesslock, flags);
2173
2174 /* make sure there are no blocks/unblocks queued */
2175 flush_workqueue(iscsi_eh_timer_workq);
2176 /* make sure the timedout callout is not running */
2177 if (!cancel_delayed_work(&session->recovery_work))
2178 flush_workqueue(iscsi_eh_timer_workq);
2179 /*
2180 * If we are blocked let commands flow again. The lld or iscsi
2181 * layer should set up the queuecommand to fail commands.
2182 * We assume that LLD will not be calling block/unblock while
2183 * removing the session.
2184 */
2185 spin_lock_irqsave(&session->lock, flags);
2186 session->state = ISCSI_SESSION_FREE;
2187 spin_unlock_irqrestore(&session->lock, flags);
2188
2189 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2190 /* flush running scans then delete devices */
2191 flush_work(&session->scan_work);
2192 /* flush running unbind operations */
2193 flush_work(&session->unbind_work);
2194 __iscsi_unbind_session(&session->unbind_work);
2195
2196 /* hw iscsi may not have removed all connections from session */
2197 err = device_for_each_child(&session->dev, NULL,
2198 iscsi_iter_destroy_conn_fn);
2199 if (err)
2200 iscsi_cls_session_printk(KERN_ERR, session,
2201 "Could not delete all connections "
2202 "for session. Error %d.\n", err);
2203
2204 transport_unregister_device(&session->dev);
2205
2206 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2207 device_del(&session->dev);
2208 }
2209 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2210
2211 void iscsi_free_session(struct iscsi_cls_session *session)
2212 {
2213 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2214 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2215 put_device(&session->dev);
2216 }
2217 EXPORT_SYMBOL_GPL(iscsi_free_session);
2218
2219 /**
2220 * iscsi_create_conn - create iscsi class connection
2221 * @session: iscsi cls session
2222 * @dd_size: private driver data size
2223 * @cid: connection id
2224 *
2225 * This can be called from a LLD or iscsi_transport. The connection
2226 * is child of the session so cid must be unique for all connections
2227 * on the session.
2228 *
2229 * Since we do not support MCS, cid will normally be zero. In some cases
2230 * for software iscsi we could be trying to preallocate a connection struct
2231 * in which case there could be two connection structs and cid would be
2232 * non-zero.
2233 */
2234 struct iscsi_cls_conn *
2235 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2236 {
2237 struct iscsi_transport *transport = session->transport;
2238 struct iscsi_cls_conn *conn;
2239 unsigned long flags;
2240 int err;
2241
2242 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2243 if (!conn)
2244 return NULL;
2245 if (dd_size)
2246 conn->dd_data = &conn[1];
2247
2248 mutex_init(&conn->ep_mutex);
2249 INIT_LIST_HEAD(&conn->conn_list);
2250 conn->transport = transport;
2251 conn->cid = cid;
2252
2253 /* this is released in the dev's release function */
2254 if (!get_device(&session->dev))
2255 goto free_conn;
2256
2257 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2258 conn->dev.parent = &session->dev;
2259 conn->dev.release = iscsi_conn_release;
2260 err = device_register(&conn->dev);
2261 if (err) {
2262 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2263 "register connection's dev\n");
2264 goto release_parent_ref;
2265 }
2266 transport_register_device(&conn->dev);
2267
2268 spin_lock_irqsave(&connlock, flags);
2269 list_add(&conn->conn_list, &connlist);
2270 spin_unlock_irqrestore(&connlock, flags);
2271
2272 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2273 return conn;
2274
2275 release_parent_ref:
2276 put_device(&session->dev);
2277 free_conn:
2278 kfree(conn);
2279 return NULL;
2280 }
2281
2282 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2283
2284 /**
2285 * iscsi_destroy_conn - destroy iscsi class connection
2286 * @conn: iscsi cls session
2287 *
2288 * This can be called from a LLD or iscsi_transport.
2289 */
2290 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2291 {
2292 unsigned long flags;
2293
2294 spin_lock_irqsave(&connlock, flags);
2295 list_del(&conn->conn_list);
2296 spin_unlock_irqrestore(&connlock, flags);
2297
2298 transport_unregister_device(&conn->dev);
2299 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2300 device_unregister(&conn->dev);
2301 return 0;
2302 }
2303 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2304
2305 /*
2306 * iscsi interface functions
2307 */
2308 static struct iscsi_internal *
2309 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2310 {
2311 struct iscsi_internal *priv;
2312 unsigned long flags;
2313
2314 spin_lock_irqsave(&iscsi_transport_lock, flags);
2315 list_for_each_entry(priv, &iscsi_transports, list) {
2316 if (tt == priv->iscsi_transport) {
2317 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2318 return priv;
2319 }
2320 }
2321 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2322 return NULL;
2323 }
2324
2325 static int
2326 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2327 {
2328 return nlmsg_multicast(nls, skb, 0, group, gfp);
2329 }
2330
2331 static int
2332 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2333 {
2334 return nlmsg_unicast(nls, skb, portid);
2335 }
2336
2337 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2338 char *data, uint32_t data_size)
2339 {
2340 struct nlmsghdr *nlh;
2341 struct sk_buff *skb;
2342 struct iscsi_uevent *ev;
2343 char *pdu;
2344 struct iscsi_internal *priv;
2345 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2346 data_size);
2347
2348 priv = iscsi_if_transport_lookup(conn->transport);
2349 if (!priv)
2350 return -EINVAL;
2351
2352 skb = alloc_skb(len, GFP_ATOMIC);
2353 if (!skb) {
2354 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2355 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2356 "control PDU: OOM\n");
2357 return -ENOMEM;
2358 }
2359
2360 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2361 ev = nlmsg_data(nlh);
2362 memset(ev, 0, sizeof(*ev));
2363 ev->transport_handle = iscsi_handle(conn->transport);
2364 ev->type = ISCSI_KEVENT_RECV_PDU;
2365 ev->r.recv_req.cid = conn->cid;
2366 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2367 pdu = (char*)ev + sizeof(*ev);
2368 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2369 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2370
2371 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2372 }
2373 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2374
2375 int iscsi_offload_mesg(struct Scsi_Host *shost,
2376 struct iscsi_transport *transport, uint32_t type,
2377 char *data, uint16_t data_size)
2378 {
2379 struct nlmsghdr *nlh;
2380 struct sk_buff *skb;
2381 struct iscsi_uevent *ev;
2382 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2383
2384 skb = alloc_skb(len, GFP_ATOMIC);
2385 if (!skb) {
2386 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2387 return -ENOMEM;
2388 }
2389
2390 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2391 ev = nlmsg_data(nlh);
2392 memset(ev, 0, sizeof(*ev));
2393 ev->type = type;
2394 ev->transport_handle = iscsi_handle(transport);
2395 switch (type) {
2396 case ISCSI_KEVENT_PATH_REQ:
2397 ev->r.req_path.host_no = shost->host_no;
2398 break;
2399 case ISCSI_KEVENT_IF_DOWN:
2400 ev->r.notify_if_down.host_no = shost->host_no;
2401 break;
2402 }
2403
2404 memcpy((char *)ev + sizeof(*ev), data, data_size);
2405
2406 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2407 }
2408 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2409
2410 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2411 {
2412 struct nlmsghdr *nlh;
2413 struct sk_buff *skb;
2414 struct iscsi_uevent *ev;
2415 struct iscsi_internal *priv;
2416 int len = nlmsg_total_size(sizeof(*ev));
2417
2418 priv = iscsi_if_transport_lookup(conn->transport);
2419 if (!priv)
2420 return;
2421
2422 skb = alloc_skb(len, GFP_ATOMIC);
2423 if (!skb) {
2424 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2425 "conn error (%d)\n", error);
2426 return;
2427 }
2428
2429 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2430 ev = nlmsg_data(nlh);
2431 ev->transport_handle = iscsi_handle(conn->transport);
2432 ev->type = ISCSI_KEVENT_CONN_ERROR;
2433 ev->r.connerror.error = error;
2434 ev->r.connerror.cid = conn->cid;
2435 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2436
2437 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2438
2439 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2440 error);
2441 }
2442 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2443
2444 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2445 enum iscsi_conn_state state)
2446 {
2447 struct nlmsghdr *nlh;
2448 struct sk_buff *skb;
2449 struct iscsi_uevent *ev;
2450 struct iscsi_internal *priv;
2451 int len = nlmsg_total_size(sizeof(*ev));
2452
2453 priv = iscsi_if_transport_lookup(conn->transport);
2454 if (!priv)
2455 return;
2456
2457 skb = alloc_skb(len, GFP_ATOMIC);
2458 if (!skb) {
2459 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2460 "conn login (%d)\n", state);
2461 return;
2462 }
2463
2464 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2465 ev = nlmsg_data(nlh);
2466 ev->transport_handle = iscsi_handle(conn->transport);
2467 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2468 ev->r.conn_login.state = state;
2469 ev->r.conn_login.cid = conn->cid;
2470 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2471 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2472
2473 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2474 state);
2475 }
2476 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2477
2478 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2479 enum iscsi_host_event_code code, uint32_t data_size,
2480 uint8_t *data)
2481 {
2482 struct nlmsghdr *nlh;
2483 struct sk_buff *skb;
2484 struct iscsi_uevent *ev;
2485 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2486
2487 skb = alloc_skb(len, GFP_NOIO);
2488 if (!skb) {
2489 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2490 host_no, code);
2491 return;
2492 }
2493
2494 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2495 ev = nlmsg_data(nlh);
2496 ev->transport_handle = iscsi_handle(transport);
2497 ev->type = ISCSI_KEVENT_HOST_EVENT;
2498 ev->r.host_event.host_no = host_no;
2499 ev->r.host_event.code = code;
2500 ev->r.host_event.data_size = data_size;
2501
2502 if (data_size)
2503 memcpy((char *)ev + sizeof(*ev), data, data_size);
2504
2505 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2506 }
2507 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2508
2509 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2510 uint32_t status, uint32_t pid, uint32_t data_size,
2511 uint8_t *data)
2512 {
2513 struct nlmsghdr *nlh;
2514 struct sk_buff *skb;
2515 struct iscsi_uevent *ev;
2516 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2517
2518 skb = alloc_skb(len, GFP_NOIO);
2519 if (!skb) {
2520 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2521 return;
2522 }
2523
2524 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2525 ev = nlmsg_data(nlh);
2526 ev->transport_handle = iscsi_handle(transport);
2527 ev->type = ISCSI_KEVENT_PING_COMP;
2528 ev->r.ping_comp.host_no = host_no;
2529 ev->r.ping_comp.status = status;
2530 ev->r.ping_comp.pid = pid;
2531 ev->r.ping_comp.data_size = data_size;
2532 memcpy((char *)ev + sizeof(*ev), data, data_size);
2533
2534 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2535 }
2536 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2537
2538 static int
2539 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2540 {
2541 struct sk_buff *skb;
2542 struct nlmsghdr *nlh;
2543 int len = nlmsg_total_size(size);
2544
2545 skb = alloc_skb(len, GFP_ATOMIC);
2546 if (!skb) {
2547 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2548 return -ENOMEM;
2549 }
2550
2551 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2552 memcpy(nlmsg_data(nlh), payload, size);
2553 return iscsi_unicast_skb(skb, portid);
2554 }
2555
2556 static int
2557 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2558 {
2559 struct iscsi_uevent *ev = nlmsg_data(nlh);
2560 struct iscsi_stats *stats;
2561 struct sk_buff *skbstat;
2562 struct iscsi_cls_conn *conn;
2563 struct nlmsghdr *nlhstat;
2564 struct iscsi_uevent *evstat;
2565 struct iscsi_internal *priv;
2566 int len = nlmsg_total_size(sizeof(*ev) +
2567 sizeof(struct iscsi_stats) +
2568 sizeof(struct iscsi_stats_custom) *
2569 ISCSI_STATS_CUSTOM_MAX);
2570 int err = 0;
2571
2572 priv = iscsi_if_transport_lookup(transport);
2573 if (!priv)
2574 return -EINVAL;
2575
2576 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2577 if (!conn)
2578 return -EEXIST;
2579
2580 do {
2581 int actual_size;
2582
2583 skbstat = alloc_skb(len, GFP_ATOMIC);
2584 if (!skbstat) {
2585 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2586 "deliver stats: OOM\n");
2587 return -ENOMEM;
2588 }
2589
2590 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2591 (len - sizeof(*nlhstat)), 0);
2592 evstat = nlmsg_data(nlhstat);
2593 memset(evstat, 0, sizeof(*evstat));
2594 evstat->transport_handle = iscsi_handle(conn->transport);
2595 evstat->type = nlh->nlmsg_type;
2596 evstat->u.get_stats.cid =
2597 ev->u.get_stats.cid;
2598 evstat->u.get_stats.sid =
2599 ev->u.get_stats.sid;
2600 stats = (struct iscsi_stats *)
2601 ((char*)evstat + sizeof(*evstat));
2602 memset(stats, 0, sizeof(*stats));
2603
2604 transport->get_stats(conn, stats);
2605 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2606 sizeof(struct iscsi_stats) +
2607 sizeof(struct iscsi_stats_custom) *
2608 stats->custom_length);
2609 actual_size -= sizeof(*nlhstat);
2610 actual_size = nlmsg_msg_size(actual_size);
2611 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2612 nlhstat->nlmsg_len = actual_size;
2613
2614 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2615 GFP_ATOMIC);
2616 } while (err < 0 && err != -ECONNREFUSED);
2617
2618 return err;
2619 }
2620
2621 /**
2622 * iscsi_session_event - send session destr. completion event
2623 * @session: iscsi class session
2624 * @event: type of event
2625 */
2626 int iscsi_session_event(struct iscsi_cls_session *session,
2627 enum iscsi_uevent_e event)
2628 {
2629 struct iscsi_internal *priv;
2630 struct Scsi_Host *shost;
2631 struct iscsi_uevent *ev;
2632 struct sk_buff *skb;
2633 struct nlmsghdr *nlh;
2634 int rc, len = nlmsg_total_size(sizeof(*ev));
2635
2636 priv = iscsi_if_transport_lookup(session->transport);
2637 if (!priv)
2638 return -EINVAL;
2639 shost = iscsi_session_to_shost(session);
2640
2641 skb = alloc_skb(len, GFP_KERNEL);
2642 if (!skb) {
2643 iscsi_cls_session_printk(KERN_ERR, session,
2644 "Cannot notify userspace of session "
2645 "event %u\n", event);
2646 return -ENOMEM;
2647 }
2648
2649 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2650 ev = nlmsg_data(nlh);
2651 ev->transport_handle = iscsi_handle(session->transport);
2652
2653 ev->type = event;
2654 switch (event) {
2655 case ISCSI_KEVENT_DESTROY_SESSION:
2656 ev->r.d_session.host_no = shost->host_no;
2657 ev->r.d_session.sid = session->sid;
2658 break;
2659 case ISCSI_KEVENT_CREATE_SESSION:
2660 ev->r.c_session_ret.host_no = shost->host_no;
2661 ev->r.c_session_ret.sid = session->sid;
2662 break;
2663 case ISCSI_KEVENT_UNBIND_SESSION:
2664 ev->r.unbind_session.host_no = shost->host_no;
2665 ev->r.unbind_session.sid = session->sid;
2666 break;
2667 default:
2668 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2669 "%u.\n", event);
2670 kfree_skb(skb);
2671 return -EINVAL;
2672 }
2673
2674 /*
2675 * this will occur if the daemon is not up, so we just warn
2676 * the user and when the daemon is restarted it will handle it
2677 */
2678 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2679 if (rc == -ESRCH)
2680 iscsi_cls_session_printk(KERN_ERR, session,
2681 "Cannot notify userspace of session "
2682 "event %u. Check iscsi daemon\n",
2683 event);
2684
2685 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2686 event, rc);
2687 return rc;
2688 }
2689 EXPORT_SYMBOL_GPL(iscsi_session_event);
2690
2691 static int
2692 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2693 struct iscsi_uevent *ev, pid_t pid,
2694 uint32_t initial_cmdsn, uint16_t cmds_max,
2695 uint16_t queue_depth)
2696 {
2697 struct iscsi_transport *transport = priv->iscsi_transport;
2698 struct iscsi_cls_session *session;
2699 struct Scsi_Host *shost;
2700
2701 session = transport->create_session(ep, cmds_max, queue_depth,
2702 initial_cmdsn);
2703 if (!session)
2704 return -ENOMEM;
2705
2706 session->creator = pid;
2707 shost = iscsi_session_to_shost(session);
2708 ev->r.c_session_ret.host_no = shost->host_no;
2709 ev->r.c_session_ret.sid = session->sid;
2710 ISCSI_DBG_TRANS_SESSION(session,
2711 "Completed creating transport session\n");
2712 return 0;
2713 }
2714
2715 static int
2716 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2717 {
2718 struct iscsi_cls_conn *conn;
2719 struct iscsi_cls_session *session;
2720
2721 session = iscsi_session_lookup(ev->u.c_conn.sid);
2722 if (!session) {
2723 printk(KERN_ERR "iscsi: invalid session %d.\n",
2724 ev->u.c_conn.sid);
2725 return -EINVAL;
2726 }
2727
2728 conn = transport->create_conn(session, ev->u.c_conn.cid);
2729 if (!conn) {
2730 iscsi_cls_session_printk(KERN_ERR, session,
2731 "couldn't create a new connection.");
2732 return -ENOMEM;
2733 }
2734
2735 ev->r.c_conn_ret.sid = session->sid;
2736 ev->r.c_conn_ret.cid = conn->cid;
2737
2738 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2739 return 0;
2740 }
2741
2742 static int
2743 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2744 {
2745 struct iscsi_cls_conn *conn;
2746
2747 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2748 if (!conn)
2749 return -EINVAL;
2750
2751 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2752 if (transport->destroy_conn)
2753 transport->destroy_conn(conn);
2754
2755 return 0;
2756 }
2757
2758 static int
2759 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2760 {
2761 char *data = (char*)ev + sizeof(*ev);
2762 struct iscsi_cls_conn *conn;
2763 struct iscsi_cls_session *session;
2764 int err = 0, value = 0;
2765
2766 session = iscsi_session_lookup(ev->u.set_param.sid);
2767 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2768 if (!conn || !session)
2769 return -EINVAL;
2770
2771 switch (ev->u.set_param.param) {
2772 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2773 sscanf(data, "%d", &value);
2774 if (!session->recovery_tmo_sysfs_override)
2775 session->recovery_tmo = value;
2776 break;
2777 default:
2778 err = transport->set_param(conn, ev->u.set_param.param,
2779 data, ev->u.set_param.len);
2780 }
2781
2782 return err;
2783 }
2784
2785 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2786 struct iscsi_uevent *ev, int msg_type)
2787 {
2788 struct iscsi_endpoint *ep;
2789 struct sockaddr *dst_addr;
2790 struct Scsi_Host *shost = NULL;
2791 int non_blocking, err = 0;
2792
2793 if (!transport->ep_connect)
2794 return -EINVAL;
2795
2796 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2797 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2798 if (!shost) {
2799 printk(KERN_ERR "ep connect failed. Could not find "
2800 "host no %u\n",
2801 ev->u.ep_connect_through_host.host_no);
2802 return -ENODEV;
2803 }
2804 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2805 } else
2806 non_blocking = ev->u.ep_connect.non_blocking;
2807
2808 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2809 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2810 if (IS_ERR(ep)) {
2811 err = PTR_ERR(ep);
2812 goto release_host;
2813 }
2814
2815 ev->r.ep_connect_ret.handle = ep->id;
2816 release_host:
2817 if (shost)
2818 scsi_host_put(shost);
2819 return err;
2820 }
2821
2822 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2823 u64 ep_handle)
2824 {
2825 struct iscsi_cls_conn *conn;
2826 struct iscsi_endpoint *ep;
2827
2828 if (!transport->ep_disconnect)
2829 return -EINVAL;
2830
2831 ep = iscsi_lookup_endpoint(ep_handle);
2832 if (!ep)
2833 return -EINVAL;
2834 conn = ep->conn;
2835 if (conn) {
2836 mutex_lock(&conn->ep_mutex);
2837 conn->ep = NULL;
2838 mutex_unlock(&conn->ep_mutex);
2839 }
2840
2841 transport->ep_disconnect(ep);
2842 return 0;
2843 }
2844
2845 static int
2846 iscsi_if_transport_ep(struct iscsi_transport *transport,
2847 struct iscsi_uevent *ev, int msg_type)
2848 {
2849 struct iscsi_endpoint *ep;
2850 int rc = 0;
2851
2852 switch (msg_type) {
2853 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2854 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2855 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2856 break;
2857 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2858 if (!transport->ep_poll)
2859 return -EINVAL;
2860
2861 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2862 if (!ep)
2863 return -EINVAL;
2864
2865 ev->r.retcode = transport->ep_poll(ep,
2866 ev->u.ep_poll.timeout_ms);
2867 break;
2868 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2869 rc = iscsi_if_ep_disconnect(transport,
2870 ev->u.ep_disconnect.ep_handle);
2871 break;
2872 }
2873 return rc;
2874 }
2875
2876 static int
2877 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2878 struct iscsi_uevent *ev)
2879 {
2880 struct Scsi_Host *shost;
2881 struct sockaddr *dst_addr;
2882 int err;
2883
2884 if (!transport->tgt_dscvr)
2885 return -EINVAL;
2886
2887 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2888 if (!shost) {
2889 printk(KERN_ERR "target discovery could not find host no %u\n",
2890 ev->u.tgt_dscvr.host_no);
2891 return -ENODEV;
2892 }
2893
2894
2895 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2896 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2897 ev->u.tgt_dscvr.enable, dst_addr);
2898 scsi_host_put(shost);
2899 return err;
2900 }
2901
2902 static int
2903 iscsi_set_host_param(struct iscsi_transport *transport,
2904 struct iscsi_uevent *ev)
2905 {
2906 char *data = (char*)ev + sizeof(*ev);
2907 struct Scsi_Host *shost;
2908 int err;
2909
2910 if (!transport->set_host_param)
2911 return -ENOSYS;
2912
2913 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2914 if (!shost) {
2915 printk(KERN_ERR "set_host_param could not find host no %u\n",
2916 ev->u.set_host_param.host_no);
2917 return -ENODEV;
2918 }
2919
2920 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2921 data, ev->u.set_host_param.len);
2922 scsi_host_put(shost);
2923 return err;
2924 }
2925
2926 static int
2927 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2928 {
2929 struct Scsi_Host *shost;
2930 struct iscsi_path *params;
2931 int err;
2932
2933 if (!transport->set_path)
2934 return -ENOSYS;
2935
2936 shost = scsi_host_lookup(ev->u.set_path.host_no);
2937 if (!shost) {
2938 printk(KERN_ERR "set path could not find host no %u\n",
2939 ev->u.set_path.host_no);
2940 return -ENODEV;
2941 }
2942
2943 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2944 err = transport->set_path(shost, params);
2945
2946 scsi_host_put(shost);
2947 return err;
2948 }
2949
2950 static int iscsi_session_has_conns(int sid)
2951 {
2952 struct iscsi_cls_conn *conn;
2953 unsigned long flags;
2954 int found = 0;
2955
2956 spin_lock_irqsave(&connlock, flags);
2957 list_for_each_entry(conn, &connlist, conn_list) {
2958 if (iscsi_conn_get_sid(conn) == sid) {
2959 found = 1;
2960 break;
2961 }
2962 }
2963 spin_unlock_irqrestore(&connlock, flags);
2964
2965 return found;
2966 }
2967
2968 static int
2969 iscsi_set_iface_params(struct iscsi_transport *transport,
2970 struct iscsi_uevent *ev, uint32_t len)
2971 {
2972 char *data = (char *)ev + sizeof(*ev);
2973 struct Scsi_Host *shost;
2974 int err;
2975
2976 if (!transport->set_iface_param)
2977 return -ENOSYS;
2978
2979 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2980 if (!shost) {
2981 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2982 ev->u.set_iface_params.host_no);
2983 return -ENODEV;
2984 }
2985
2986 err = transport->set_iface_param(shost, data, len);
2987 scsi_host_put(shost);
2988 return err;
2989 }
2990
2991 static int
2992 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2993 {
2994 struct Scsi_Host *shost;
2995 struct sockaddr *dst_addr;
2996 int err;
2997
2998 if (!transport->send_ping)
2999 return -ENOSYS;
3000
3001 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3002 if (!shost) {
3003 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3004 ev->u.iscsi_ping.host_no);
3005 return -ENODEV;
3006 }
3007
3008 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3009 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3010 ev->u.iscsi_ping.iface_type,
3011 ev->u.iscsi_ping.payload_size,
3012 ev->u.iscsi_ping.pid,
3013 dst_addr);
3014 scsi_host_put(shost);
3015 return err;
3016 }
3017
3018 static int
3019 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3020 {
3021 struct iscsi_uevent *ev = nlmsg_data(nlh);
3022 struct Scsi_Host *shost = NULL;
3023 struct iscsi_chap_rec *chap_rec;
3024 struct iscsi_internal *priv;
3025 struct sk_buff *skbchap;
3026 struct nlmsghdr *nlhchap;
3027 struct iscsi_uevent *evchap;
3028 uint32_t chap_buf_size;
3029 int len, err = 0;
3030 char *buf;
3031
3032 if (!transport->get_chap)
3033 return -EINVAL;
3034
3035 priv = iscsi_if_transport_lookup(transport);
3036 if (!priv)
3037 return -EINVAL;
3038
3039 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3040 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3041
3042 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3043 if (!shost) {
3044 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3045 __func__, ev->u.get_chap.host_no);
3046 return -ENODEV;
3047 }
3048
3049 do {
3050 int actual_size;
3051
3052 skbchap = alloc_skb(len, GFP_KERNEL);
3053 if (!skbchap) {
3054 printk(KERN_ERR "can not deliver chap: OOM\n");
3055 err = -ENOMEM;
3056 goto exit_get_chap;
3057 }
3058
3059 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3060 (len - sizeof(*nlhchap)), 0);
3061 evchap = nlmsg_data(nlhchap);
3062 memset(evchap, 0, sizeof(*evchap));
3063 evchap->transport_handle = iscsi_handle(transport);
3064 evchap->type = nlh->nlmsg_type;
3065 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3066 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3067 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3068 buf = (char *)evchap + sizeof(*evchap);
3069 memset(buf, 0, chap_buf_size);
3070
3071 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3072 &evchap->u.get_chap.num_entries, buf);
3073
3074 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3075 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3076 nlhchap->nlmsg_len = actual_size;
3077
3078 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3079 GFP_KERNEL);
3080 } while (err < 0 && err != -ECONNREFUSED);
3081
3082 exit_get_chap:
3083 scsi_host_put(shost);
3084 return err;
3085 }
3086
3087 static int iscsi_set_chap(struct iscsi_transport *transport,
3088 struct iscsi_uevent *ev, uint32_t len)
3089 {
3090 char *data = (char *)ev + sizeof(*ev);
3091 struct Scsi_Host *shost;
3092 int err = 0;
3093
3094 if (!transport->set_chap)
3095 return -ENOSYS;
3096
3097 shost = scsi_host_lookup(ev->u.set_path.host_no);
3098 if (!shost) {
3099 pr_err("%s could not find host no %u\n",
3100 __func__, ev->u.set_path.host_no);
3101 return -ENODEV;
3102 }
3103
3104 err = transport->set_chap(shost, data, len);
3105 scsi_host_put(shost);
3106 return err;
3107 }
3108
3109 static int iscsi_delete_chap(struct iscsi_transport *transport,
3110 struct iscsi_uevent *ev)
3111 {
3112 struct Scsi_Host *shost;
3113 int err = 0;
3114
3115 if (!transport->delete_chap)
3116 return -ENOSYS;
3117
3118 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3119 if (!shost) {
3120 printk(KERN_ERR "%s could not find host no %u\n",
3121 __func__, ev->u.delete_chap.host_no);
3122 return -ENODEV;
3123 }
3124
3125 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3126 scsi_host_put(shost);
3127 return err;
3128 }
3129
3130 static const struct {
3131 enum iscsi_discovery_parent_type value;
3132 char *name;
3133 } iscsi_discovery_parent_names[] = {
3134 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3135 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3136 {ISCSI_DISC_PARENT_ISNS, "isns" },
3137 };
3138
3139 char *iscsi_get_discovery_parent_name(int parent_type)
3140 {
3141 int i;
3142 char *state = "Unknown!";
3143
3144 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3145 if (iscsi_discovery_parent_names[i].value & parent_type) {
3146 state = iscsi_discovery_parent_names[i].name;
3147 break;
3148 }
3149 }
3150 return state;
3151 }
3152 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3153
3154 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3155 struct iscsi_uevent *ev, uint32_t len)
3156 {
3157 char *data = (char *)ev + sizeof(*ev);
3158 struct Scsi_Host *shost;
3159 struct iscsi_bus_flash_session *fnode_sess;
3160 struct iscsi_bus_flash_conn *fnode_conn;
3161 struct device *dev;
3162 uint32_t idx;
3163 int err = 0;
3164
3165 if (!transport->set_flashnode_param) {
3166 err = -ENOSYS;
3167 goto exit_set_fnode;
3168 }
3169
3170 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3171 if (!shost) {
3172 pr_err("%s could not find host no %u\n",
3173 __func__, ev->u.set_flashnode.host_no);
3174 err = -ENODEV;
3175 goto put_host;
3176 }
3177
3178 idx = ev->u.set_flashnode.flashnode_idx;
3179 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3180 if (!fnode_sess) {
3181 pr_err("%s could not find flashnode %u for host no %u\n",
3182 __func__, idx, ev->u.set_flashnode.host_no);
3183 err = -ENODEV;
3184 goto put_host;
3185 }
3186
3187 dev = iscsi_find_flashnode_conn(fnode_sess);
3188 if (!dev) {
3189 err = -ENODEV;
3190 goto put_sess;
3191 }
3192
3193 fnode_conn = iscsi_dev_to_flash_conn(dev);
3194 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3195 put_device(dev);
3196
3197 put_sess:
3198 put_device(&fnode_sess->dev);
3199
3200 put_host:
3201 scsi_host_put(shost);
3202
3203 exit_set_fnode:
3204 return err;
3205 }
3206
3207 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3208 struct iscsi_uevent *ev, uint32_t len)
3209 {
3210 char *data = (char *)ev + sizeof(*ev);
3211 struct Scsi_Host *shost;
3212 int index;
3213 int err = 0;
3214
3215 if (!transport->new_flashnode) {
3216 err = -ENOSYS;
3217 goto exit_new_fnode;
3218 }
3219
3220 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3221 if (!shost) {
3222 pr_err("%s could not find host no %u\n",
3223 __func__, ev->u.new_flashnode.host_no);
3224 err = -ENODEV;
3225 goto put_host;
3226 }
3227
3228 index = transport->new_flashnode(shost, data, len);
3229
3230 if (index >= 0)
3231 ev->r.new_flashnode_ret.flashnode_idx = index;
3232 else
3233 err = -EIO;
3234
3235 put_host:
3236 scsi_host_put(shost);
3237
3238 exit_new_fnode:
3239 return err;
3240 }
3241
3242 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3243 struct iscsi_uevent *ev)
3244 {
3245 struct Scsi_Host *shost;
3246 struct iscsi_bus_flash_session *fnode_sess;
3247 uint32_t idx;
3248 int err = 0;
3249
3250 if (!transport->del_flashnode) {
3251 err = -ENOSYS;
3252 goto exit_del_fnode;
3253 }
3254
3255 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3256 if (!shost) {
3257 pr_err("%s could not find host no %u\n",
3258 __func__, ev->u.del_flashnode.host_no);
3259 err = -ENODEV;
3260 goto put_host;
3261 }
3262
3263 idx = ev->u.del_flashnode.flashnode_idx;
3264 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3265 if (!fnode_sess) {
3266 pr_err("%s could not find flashnode %u for host no %u\n",
3267 __func__, idx, ev->u.del_flashnode.host_no);
3268 err = -ENODEV;
3269 goto put_host;
3270 }
3271
3272 err = transport->del_flashnode(fnode_sess);
3273 put_device(&fnode_sess->dev);
3274
3275 put_host:
3276 scsi_host_put(shost);
3277
3278 exit_del_fnode:
3279 return err;
3280 }
3281
3282 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3283 struct iscsi_uevent *ev)
3284 {
3285 struct Scsi_Host *shost;
3286 struct iscsi_bus_flash_session *fnode_sess;
3287 struct iscsi_bus_flash_conn *fnode_conn;
3288 struct device *dev;
3289 uint32_t idx;
3290 int err = 0;
3291
3292 if (!transport->login_flashnode) {
3293 err = -ENOSYS;
3294 goto exit_login_fnode;
3295 }
3296
3297 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3298 if (!shost) {
3299 pr_err("%s could not find host no %u\n",
3300 __func__, ev->u.login_flashnode.host_no);
3301 err = -ENODEV;
3302 goto put_host;
3303 }
3304
3305 idx = ev->u.login_flashnode.flashnode_idx;
3306 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3307 if (!fnode_sess) {
3308 pr_err("%s could not find flashnode %u for host no %u\n",
3309 __func__, idx, ev->u.login_flashnode.host_no);
3310 err = -ENODEV;
3311 goto put_host;
3312 }
3313
3314 dev = iscsi_find_flashnode_conn(fnode_sess);
3315 if (!dev) {
3316 err = -ENODEV;
3317 goto put_sess;
3318 }
3319
3320 fnode_conn = iscsi_dev_to_flash_conn(dev);
3321 err = transport->login_flashnode(fnode_sess, fnode_conn);
3322 put_device(dev);
3323
3324 put_sess:
3325 put_device(&fnode_sess->dev);
3326
3327 put_host:
3328 scsi_host_put(shost);
3329
3330 exit_login_fnode:
3331 return err;
3332 }
3333
3334 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3335 struct iscsi_uevent *ev)
3336 {
3337 struct Scsi_Host *shost;
3338 struct iscsi_bus_flash_session *fnode_sess;
3339 struct iscsi_bus_flash_conn *fnode_conn;
3340 struct device *dev;
3341 uint32_t idx;
3342 int err = 0;
3343
3344 if (!transport->logout_flashnode) {
3345 err = -ENOSYS;
3346 goto exit_logout_fnode;
3347 }
3348
3349 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3350 if (!shost) {
3351 pr_err("%s could not find host no %u\n",
3352 __func__, ev->u.logout_flashnode.host_no);
3353 err = -ENODEV;
3354 goto put_host;
3355 }
3356
3357 idx = ev->u.logout_flashnode.flashnode_idx;
3358 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3359 if (!fnode_sess) {
3360 pr_err("%s could not find flashnode %u for host no %u\n",
3361 __func__, idx, ev->u.logout_flashnode.host_no);
3362 err = -ENODEV;
3363 goto put_host;
3364 }
3365
3366 dev = iscsi_find_flashnode_conn(fnode_sess);
3367 if (!dev) {
3368 err = -ENODEV;
3369 goto put_sess;
3370 }
3371
3372 fnode_conn = iscsi_dev_to_flash_conn(dev);
3373
3374 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3375 put_device(dev);
3376
3377 put_sess:
3378 put_device(&fnode_sess->dev);
3379
3380 put_host:
3381 scsi_host_put(shost);
3382
3383 exit_logout_fnode:
3384 return err;
3385 }
3386
3387 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3388 struct iscsi_uevent *ev)
3389 {
3390 struct Scsi_Host *shost;
3391 struct iscsi_cls_session *session;
3392 int err = 0;
3393
3394 if (!transport->logout_flashnode_sid) {
3395 err = -ENOSYS;
3396 goto exit_logout_sid;
3397 }
3398
3399 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3400 if (!shost) {
3401 pr_err("%s could not find host no %u\n",
3402 __func__, ev->u.logout_flashnode.host_no);
3403 err = -ENODEV;
3404 goto put_host;
3405 }
3406
3407 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3408 if (!session) {
3409 pr_err("%s could not find session id %u\n",
3410 __func__, ev->u.logout_flashnode_sid.sid);
3411 err = -EINVAL;
3412 goto put_host;
3413 }
3414
3415 err = transport->logout_flashnode_sid(session);
3416
3417 put_host:
3418 scsi_host_put(shost);
3419
3420 exit_logout_sid:
3421 return err;
3422 }
3423
3424 static int
3425 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3426 {
3427 struct iscsi_uevent *ev = nlmsg_data(nlh);
3428 struct Scsi_Host *shost = NULL;
3429 struct iscsi_internal *priv;
3430 struct sk_buff *skbhost_stats;
3431 struct nlmsghdr *nlhhost_stats;
3432 struct iscsi_uevent *evhost_stats;
3433 int host_stats_size = 0;
3434 int len, err = 0;
3435 char *buf;
3436
3437 if (!transport->get_host_stats)
3438 return -ENOSYS;
3439
3440 priv = iscsi_if_transport_lookup(transport);
3441 if (!priv)
3442 return -EINVAL;
3443
3444 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3445 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3446
3447 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3448 if (!shost) {
3449 pr_err("%s: failed. Could not find host no %u\n",
3450 __func__, ev->u.get_host_stats.host_no);
3451 return -ENODEV;
3452 }
3453
3454 do {
3455 int actual_size;
3456
3457 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3458 if (!skbhost_stats) {
3459 pr_err("cannot deliver host stats: OOM\n");
3460 err = -ENOMEM;
3461 goto exit_host_stats;
3462 }
3463
3464 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3465 (len - sizeof(*nlhhost_stats)), 0);
3466 evhost_stats = nlmsg_data(nlhhost_stats);
3467 memset(evhost_stats, 0, sizeof(*evhost_stats));
3468 evhost_stats->transport_handle = iscsi_handle(transport);
3469 evhost_stats->type = nlh->nlmsg_type;
3470 evhost_stats->u.get_host_stats.host_no =
3471 ev->u.get_host_stats.host_no;
3472 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3473 memset(buf, 0, host_stats_size);
3474
3475 err = transport->get_host_stats(shost, buf, host_stats_size);
3476 if (err) {
3477 kfree_skb(skbhost_stats);
3478 goto exit_host_stats;
3479 }
3480
3481 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3482 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3483 nlhhost_stats->nlmsg_len = actual_size;
3484
3485 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3486 GFP_KERNEL);
3487 } while (err < 0 && err != -ECONNREFUSED);
3488
3489 exit_host_stats:
3490 scsi_host_put(shost);
3491 return err;
3492 }
3493
3494
3495 static int
3496 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3497 {
3498 int err = 0;
3499 u32 portid;
3500 struct iscsi_uevent *ev = nlmsg_data(nlh);
3501 struct iscsi_transport *transport = NULL;
3502 struct iscsi_internal *priv;
3503 struct iscsi_cls_session *session;
3504 struct iscsi_cls_conn *conn;
3505 struct iscsi_endpoint *ep = NULL;
3506
3507 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3508 *group = ISCSI_NL_GRP_UIP;
3509 else
3510 *group = ISCSI_NL_GRP_ISCSID;
3511
3512 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3513 if (!priv)
3514 return -EINVAL;
3515 transport = priv->iscsi_transport;
3516
3517 if (!try_module_get(transport->owner))
3518 return -EINVAL;
3519
3520 portid = NETLINK_CB(skb).portid;
3521
3522 switch (nlh->nlmsg_type) {
3523 case ISCSI_UEVENT_CREATE_SESSION:
3524 err = iscsi_if_create_session(priv, ep, ev,
3525 portid,
3526 ev->u.c_session.initial_cmdsn,
3527 ev->u.c_session.cmds_max,
3528 ev->u.c_session.queue_depth);
3529 break;
3530 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3531 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3532 if (!ep) {
3533 err = -EINVAL;
3534 break;
3535 }
3536
3537 err = iscsi_if_create_session(priv, ep, ev,
3538 portid,
3539 ev->u.c_bound_session.initial_cmdsn,
3540 ev->u.c_bound_session.cmds_max,
3541 ev->u.c_bound_session.queue_depth);
3542 break;
3543 case ISCSI_UEVENT_DESTROY_SESSION:
3544 session = iscsi_session_lookup(ev->u.d_session.sid);
3545 if (!session)
3546 err = -EINVAL;
3547 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3548 err = -EBUSY;
3549 else
3550 transport->destroy_session(session);
3551 break;
3552 case ISCSI_UEVENT_UNBIND_SESSION:
3553 session = iscsi_session_lookup(ev->u.d_session.sid);
3554 if (session)
3555 scsi_queue_work(iscsi_session_to_shost(session),
3556 &session->unbind_work);
3557 else
3558 err = -EINVAL;
3559 break;
3560 case ISCSI_UEVENT_CREATE_CONN:
3561 err = iscsi_if_create_conn(transport, ev);
3562 break;
3563 case ISCSI_UEVENT_DESTROY_CONN:
3564 err = iscsi_if_destroy_conn(transport, ev);
3565 break;
3566 case ISCSI_UEVENT_BIND_CONN:
3567 session = iscsi_session_lookup(ev->u.b_conn.sid);
3568 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3569
3570 if (conn && conn->ep)
3571 iscsi_if_ep_disconnect(transport, conn->ep->id);
3572
3573 if (!session || !conn) {
3574 err = -EINVAL;
3575 break;
3576 }
3577
3578 ev->r.retcode = transport->bind_conn(session, conn,
3579 ev->u.b_conn.transport_eph,
3580 ev->u.b_conn.is_leading);
3581 if (ev->r.retcode || !transport->ep_connect)
3582 break;
3583
3584 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3585 if (ep) {
3586 ep->conn = conn;
3587
3588 mutex_lock(&conn->ep_mutex);
3589 conn->ep = ep;
3590 mutex_unlock(&conn->ep_mutex);
3591 } else
3592 iscsi_cls_conn_printk(KERN_ERR, conn,
3593 "Could not set ep conn "
3594 "binding\n");
3595 break;
3596 case ISCSI_UEVENT_SET_PARAM:
3597 err = iscsi_set_param(transport, ev);
3598 break;
3599 case ISCSI_UEVENT_START_CONN:
3600 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3601 if (conn)
3602 ev->r.retcode = transport->start_conn(conn);
3603 else
3604 err = -EINVAL;
3605 break;
3606 case ISCSI_UEVENT_STOP_CONN:
3607 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3608 if (conn)
3609 transport->stop_conn(conn, ev->u.stop_conn.flag);
3610 else
3611 err = -EINVAL;
3612 break;
3613 case ISCSI_UEVENT_SEND_PDU:
3614 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3615 if (conn)
3616 ev->r.retcode = transport->send_pdu(conn,
3617 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3618 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3619 ev->u.send_pdu.data_size);
3620 else
3621 err = -EINVAL;
3622 break;
3623 case ISCSI_UEVENT_GET_STATS:
3624 err = iscsi_if_get_stats(transport, nlh);
3625 break;
3626 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3627 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3628 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3629 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3630 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3631 break;
3632 case ISCSI_UEVENT_TGT_DSCVR:
3633 err = iscsi_tgt_dscvr(transport, ev);
3634 break;
3635 case ISCSI_UEVENT_SET_HOST_PARAM:
3636 err = iscsi_set_host_param(transport, ev);
3637 break;
3638 case ISCSI_UEVENT_PATH_UPDATE:
3639 err = iscsi_set_path(transport, ev);
3640 break;
3641 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3642 err = iscsi_set_iface_params(transport, ev,
3643 nlmsg_attrlen(nlh, sizeof(*ev)));
3644 break;
3645 case ISCSI_UEVENT_PING:
3646 err = iscsi_send_ping(transport, ev);
3647 break;
3648 case ISCSI_UEVENT_GET_CHAP:
3649 err = iscsi_get_chap(transport, nlh);
3650 break;
3651 case ISCSI_UEVENT_DELETE_CHAP:
3652 err = iscsi_delete_chap(transport, ev);
3653 break;
3654 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3655 err = iscsi_set_flashnode_param(transport, ev,
3656 nlmsg_attrlen(nlh,
3657 sizeof(*ev)));
3658 break;
3659 case ISCSI_UEVENT_NEW_FLASHNODE:
3660 err = iscsi_new_flashnode(transport, ev,
3661 nlmsg_attrlen(nlh, sizeof(*ev)));
3662 break;
3663 case ISCSI_UEVENT_DEL_FLASHNODE:
3664 err = iscsi_del_flashnode(transport, ev);
3665 break;
3666 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3667 err = iscsi_login_flashnode(transport, ev);
3668 break;
3669 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3670 err = iscsi_logout_flashnode(transport, ev);
3671 break;
3672 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3673 err = iscsi_logout_flashnode_sid(transport, ev);
3674 break;
3675 case ISCSI_UEVENT_SET_CHAP:
3676 err = iscsi_set_chap(transport, ev,
3677 nlmsg_attrlen(nlh, sizeof(*ev)));
3678 break;
3679 case ISCSI_UEVENT_GET_HOST_STATS:
3680 err = iscsi_get_host_stats(transport, nlh);
3681 break;
3682 default:
3683 err = -ENOSYS;
3684 break;
3685 }
3686
3687 module_put(transport->owner);
3688 return err;
3689 }
3690
3691 /*
3692 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3693 * Malformed skbs with wrong lengths or invalid creds are not processed.
3694 */
3695 static void
3696 iscsi_if_rx(struct sk_buff *skb)
3697 {
3698 u32 portid = NETLINK_CB(skb).portid;
3699
3700 mutex_lock(&rx_queue_mutex);
3701 while (skb->len >= NLMSG_HDRLEN) {
3702 int err;
3703 uint32_t rlen;
3704 struct nlmsghdr *nlh;
3705 struct iscsi_uevent *ev;
3706 uint32_t group;
3707 int retries = ISCSI_SEND_MAX_ALLOWED;
3708
3709 nlh = nlmsg_hdr(skb);
3710 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3711 skb->len < nlh->nlmsg_len) {
3712 break;
3713 }
3714
3715 ev = nlmsg_data(nlh);
3716 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3717 if (rlen > skb->len)
3718 rlen = skb->len;
3719
3720 err = iscsi_if_recv_msg(skb, nlh, &group);
3721 if (err) {
3722 ev->type = ISCSI_KEVENT_IF_ERROR;
3723 ev->iferror = err;
3724 }
3725 do {
3726 /*
3727 * special case for GET_STATS:
3728 * on success - sending reply and stats from
3729 * inside of if_recv_msg(),
3730 * on error - fall through.
3731 */
3732 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3733 break;
3734 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3735 break;
3736 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3737 ev, sizeof(*ev));
3738 if (err == -EAGAIN && --retries < 0) {
3739 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3740 break;
3741 }
3742 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3743 skb_pull(skb, rlen);
3744 }
3745 mutex_unlock(&rx_queue_mutex);
3746 }
3747
3748 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3749 struct device_attribute dev_attr_##_prefix##_##_name = \
3750 __ATTR(_name,_mode,_show,_store)
3751
3752 /*
3753 * iSCSI connection attrs
3754 */
3755 #define iscsi_conn_attr_show(param) \
3756 static ssize_t \
3757 show_conn_param_##param(struct device *dev, \
3758 struct device_attribute *attr, char *buf) \
3759 { \
3760 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3761 struct iscsi_transport *t = conn->transport; \
3762 return t->get_conn_param(conn, param, buf); \
3763 }
3764
3765 #define iscsi_conn_attr(field, param) \
3766 iscsi_conn_attr_show(param) \
3767 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3768 NULL);
3769
3770 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3771 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3772 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3773 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3774 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3775 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3776 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3777 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3778 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3779 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3780 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3781 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3782 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3783 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3784 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3785 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3786 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3787 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3788 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3789 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3790 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3791 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3792 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3793 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3794 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3795 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3796 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3797 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3798
3799
3800 #define iscsi_conn_ep_attr_show(param) \
3801 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3802 struct device_attribute *attr,\
3803 char *buf) \
3804 { \
3805 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3806 struct iscsi_transport *t = conn->transport; \
3807 struct iscsi_endpoint *ep; \
3808 ssize_t rc; \
3809 \
3810 /* \
3811 * Need to make sure ep_disconnect does not free the LLD's \
3812 * interconnect resources while we are trying to read them. \
3813 */ \
3814 mutex_lock(&conn->ep_mutex); \
3815 ep = conn->ep; \
3816 if (!ep && t->ep_connect) { \
3817 mutex_unlock(&conn->ep_mutex); \
3818 return -ENOTCONN; \
3819 } \
3820 \
3821 if (ep) \
3822 rc = t->get_ep_param(ep, param, buf); \
3823 else \
3824 rc = t->get_conn_param(conn, param, buf); \
3825 mutex_unlock(&conn->ep_mutex); \
3826 return rc; \
3827 }
3828
3829 #define iscsi_conn_ep_attr(field, param) \
3830 iscsi_conn_ep_attr_show(param) \
3831 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3832 show_conn_ep_param_##param, NULL);
3833
3834 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3835 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3836
3837 static struct attribute *iscsi_conn_attrs[] = {
3838 &dev_attr_conn_max_recv_dlength.attr,
3839 &dev_attr_conn_max_xmit_dlength.attr,
3840 &dev_attr_conn_header_digest.attr,
3841 &dev_attr_conn_data_digest.attr,
3842 &dev_attr_conn_ifmarker.attr,
3843 &dev_attr_conn_ofmarker.attr,
3844 &dev_attr_conn_address.attr,
3845 &dev_attr_conn_port.attr,
3846 &dev_attr_conn_exp_statsn.attr,
3847 &dev_attr_conn_persistent_address.attr,
3848 &dev_attr_conn_persistent_port.attr,
3849 &dev_attr_conn_ping_tmo.attr,
3850 &dev_attr_conn_recv_tmo.attr,
3851 &dev_attr_conn_local_port.attr,
3852 &dev_attr_conn_statsn.attr,
3853 &dev_attr_conn_keepalive_tmo.attr,
3854 &dev_attr_conn_max_segment_size.attr,
3855 &dev_attr_conn_tcp_timestamp_stat.attr,
3856 &dev_attr_conn_tcp_wsf_disable.attr,
3857 &dev_attr_conn_tcp_nagle_disable.attr,
3858 &dev_attr_conn_tcp_timer_scale.attr,
3859 &dev_attr_conn_tcp_timestamp_enable.attr,
3860 &dev_attr_conn_fragment_disable.attr,
3861 &dev_attr_conn_ipv4_tos.attr,
3862 &dev_attr_conn_ipv6_traffic_class.attr,
3863 &dev_attr_conn_ipv6_flow_label.attr,
3864 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3865 &dev_attr_conn_tcp_xmit_wsf.attr,
3866 &dev_attr_conn_tcp_recv_wsf.attr,
3867 &dev_attr_conn_local_ipaddr.attr,
3868 NULL,
3869 };
3870
3871 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3872 struct attribute *attr, int i)
3873 {
3874 struct device *cdev = container_of(kobj, struct device, kobj);
3875 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3876 struct iscsi_transport *t = conn->transport;
3877 int param;
3878
3879 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3880 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3881 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3882 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3883 else if (attr == &dev_attr_conn_header_digest.attr)
3884 param = ISCSI_PARAM_HDRDGST_EN;
3885 else if (attr == &dev_attr_conn_data_digest.attr)
3886 param = ISCSI_PARAM_DATADGST_EN;
3887 else if (attr == &dev_attr_conn_ifmarker.attr)
3888 param = ISCSI_PARAM_IFMARKER_EN;
3889 else if (attr == &dev_attr_conn_ofmarker.attr)
3890 param = ISCSI_PARAM_OFMARKER_EN;
3891 else if (attr == &dev_attr_conn_address.attr)
3892 param = ISCSI_PARAM_CONN_ADDRESS;
3893 else if (attr == &dev_attr_conn_port.attr)
3894 param = ISCSI_PARAM_CONN_PORT;
3895 else if (attr == &dev_attr_conn_exp_statsn.attr)
3896 param = ISCSI_PARAM_EXP_STATSN;
3897 else if (attr == &dev_attr_conn_persistent_address.attr)
3898 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3899 else if (attr == &dev_attr_conn_persistent_port.attr)
3900 param = ISCSI_PARAM_PERSISTENT_PORT;
3901 else if (attr == &dev_attr_conn_ping_tmo.attr)
3902 param = ISCSI_PARAM_PING_TMO;
3903 else if (attr == &dev_attr_conn_recv_tmo.attr)
3904 param = ISCSI_PARAM_RECV_TMO;
3905 else if (attr == &dev_attr_conn_local_port.attr)
3906 param = ISCSI_PARAM_LOCAL_PORT;
3907 else if (attr == &dev_attr_conn_statsn.attr)
3908 param = ISCSI_PARAM_STATSN;
3909 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3910 param = ISCSI_PARAM_KEEPALIVE_TMO;
3911 else if (attr == &dev_attr_conn_max_segment_size.attr)
3912 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3913 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3914 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3915 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3916 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3917 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3918 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3919 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3920 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3921 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3922 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3923 else if (attr == &dev_attr_conn_fragment_disable.attr)
3924 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3925 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3926 param = ISCSI_PARAM_IPV4_TOS;
3927 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3928 param = ISCSI_PARAM_IPV6_TC;
3929 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3930 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3931 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3932 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3933 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3934 param = ISCSI_PARAM_TCP_XMIT_WSF;
3935 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3936 param = ISCSI_PARAM_TCP_RECV_WSF;
3937 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3938 param = ISCSI_PARAM_LOCAL_IPADDR;
3939 else {
3940 WARN_ONCE(1, "Invalid conn attr");
3941 return 0;
3942 }
3943
3944 return t->attr_is_visible(ISCSI_PARAM, param);
3945 }
3946
3947 static struct attribute_group iscsi_conn_group = {
3948 .attrs = iscsi_conn_attrs,
3949 .is_visible = iscsi_conn_attr_is_visible,
3950 };
3951
3952 /*
3953 * iSCSI session attrs
3954 */
3955 #define iscsi_session_attr_show(param, perm) \
3956 static ssize_t \
3957 show_session_param_##param(struct device *dev, \
3958 struct device_attribute *attr, char *buf) \
3959 { \
3960 struct iscsi_cls_session *session = \
3961 iscsi_dev_to_session(dev->parent); \
3962 struct iscsi_transport *t = session->transport; \
3963 \
3964 if (perm && !capable(CAP_SYS_ADMIN)) \
3965 return -EACCES; \
3966 return t->get_session_param(session, param, buf); \
3967 }
3968
3969 #define iscsi_session_attr(field, param, perm) \
3970 iscsi_session_attr_show(param, perm) \
3971 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3972 NULL);
3973 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3974 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3975 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3976 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3977 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3978 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3979 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3980 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3981 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3982 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3983 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3984 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3985 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3986 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
3987 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3988 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
3989 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3990 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3991 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3992 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
3993 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3994 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3995 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3996 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3997 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3998 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
3999 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4000 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4001 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4002 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4003 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4004 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4005 iscsi_session_attr(discovery_auth_optional,
4006 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4007 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4008 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4009 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4010 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4011 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4012 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4013 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4014
4015 static ssize_t
4016 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4017 char *buf)
4018 {
4019 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4020 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4021 }
4022 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4023 NULL);
4024 static ssize_t
4025 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4026 char *buf)
4027 {
4028 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4029 return sprintf(buf, "%d\n", session->creator);
4030 }
4031 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4032 NULL);
4033 static ssize_t
4034 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4035 char *buf)
4036 {
4037 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4038 return sprintf(buf, "%d\n", session->target_id);
4039 }
4040 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4041 show_priv_session_target_id, NULL);
4042
4043 #define iscsi_priv_session_attr_show(field, format) \
4044 static ssize_t \
4045 show_priv_session_##field(struct device *dev, \
4046 struct device_attribute *attr, char *buf) \
4047 { \
4048 struct iscsi_cls_session *session = \
4049 iscsi_dev_to_session(dev->parent); \
4050 if (session->field == -1) \
4051 return sprintf(buf, "off\n"); \
4052 return sprintf(buf, format"\n", session->field); \
4053 }
4054
4055 #define iscsi_priv_session_attr_store(field) \
4056 static ssize_t \
4057 store_priv_session_##field(struct device *dev, \
4058 struct device_attribute *attr, \
4059 const char *buf, size_t count) \
4060 { \
4061 int val; \
4062 char *cp; \
4063 struct iscsi_cls_session *session = \
4064 iscsi_dev_to_session(dev->parent); \
4065 if ((session->state == ISCSI_SESSION_FREE) || \
4066 (session->state == ISCSI_SESSION_FAILED)) \
4067 return -EBUSY; \
4068 if (strncmp(buf, "off", 3) == 0) { \
4069 session->field = -1; \
4070 session->field##_sysfs_override = true; \
4071 } else { \
4072 val = simple_strtoul(buf, &cp, 0); \
4073 if (*cp != '\0' && *cp != '\n') \
4074 return -EINVAL; \
4075 session->field = val; \
4076 session->field##_sysfs_override = true; \
4077 } \
4078 return count; \
4079 }
4080
4081 #define iscsi_priv_session_rw_attr(field, format) \
4082 iscsi_priv_session_attr_show(field, format) \
4083 iscsi_priv_session_attr_store(field) \
4084 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4085 show_priv_session_##field, \
4086 store_priv_session_##field)
4087
4088 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4089
4090 static struct attribute *iscsi_session_attrs[] = {
4091 &dev_attr_sess_initial_r2t.attr,
4092 &dev_attr_sess_max_outstanding_r2t.attr,
4093 &dev_attr_sess_immediate_data.attr,
4094 &dev_attr_sess_first_burst_len.attr,
4095 &dev_attr_sess_max_burst_len.attr,
4096 &dev_attr_sess_data_pdu_in_order.attr,
4097 &dev_attr_sess_data_seq_in_order.attr,
4098 &dev_attr_sess_erl.attr,
4099 &dev_attr_sess_targetname.attr,
4100 &dev_attr_sess_tpgt.attr,
4101 &dev_attr_sess_password.attr,
4102 &dev_attr_sess_password_in.attr,
4103 &dev_attr_sess_username.attr,
4104 &dev_attr_sess_username_in.attr,
4105 &dev_attr_sess_fast_abort.attr,
4106 &dev_attr_sess_abort_tmo.attr,
4107 &dev_attr_sess_lu_reset_tmo.attr,
4108 &dev_attr_sess_tgt_reset_tmo.attr,
4109 &dev_attr_sess_ifacename.attr,
4110 &dev_attr_sess_initiatorname.attr,
4111 &dev_attr_sess_targetalias.attr,
4112 &dev_attr_sess_boot_root.attr,
4113 &dev_attr_sess_boot_nic.attr,
4114 &dev_attr_sess_boot_target.attr,
4115 &dev_attr_priv_sess_recovery_tmo.attr,
4116 &dev_attr_priv_sess_state.attr,
4117 &dev_attr_priv_sess_creator.attr,
4118 &dev_attr_sess_chap_out_idx.attr,
4119 &dev_attr_sess_chap_in_idx.attr,
4120 &dev_attr_priv_sess_target_id.attr,
4121 &dev_attr_sess_auto_snd_tgt_disable.attr,
4122 &dev_attr_sess_discovery_session.attr,
4123 &dev_attr_sess_portal_type.attr,
4124 &dev_attr_sess_chap_auth.attr,
4125 &dev_attr_sess_discovery_logout.attr,
4126 &dev_attr_sess_bidi_chap.attr,
4127 &dev_attr_sess_discovery_auth_optional.attr,
4128 &dev_attr_sess_def_time2wait.attr,
4129 &dev_attr_sess_def_time2retain.attr,
4130 &dev_attr_sess_isid.attr,
4131 &dev_attr_sess_tsid.attr,
4132 &dev_attr_sess_def_taskmgmt_tmo.attr,
4133 &dev_attr_sess_discovery_parent_idx.attr,
4134 &dev_attr_sess_discovery_parent_type.attr,
4135 NULL,
4136 };
4137
4138 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4139 struct attribute *attr, int i)
4140 {
4141 struct device *cdev = container_of(kobj, struct device, kobj);
4142 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4143 struct iscsi_transport *t = session->transport;
4144 int param;
4145
4146 if (attr == &dev_attr_sess_initial_r2t.attr)
4147 param = ISCSI_PARAM_INITIAL_R2T_EN;
4148 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4149 param = ISCSI_PARAM_MAX_R2T;
4150 else if (attr == &dev_attr_sess_immediate_data.attr)
4151 param = ISCSI_PARAM_IMM_DATA_EN;
4152 else if (attr == &dev_attr_sess_first_burst_len.attr)
4153 param = ISCSI_PARAM_FIRST_BURST;
4154 else if (attr == &dev_attr_sess_max_burst_len.attr)
4155 param = ISCSI_PARAM_MAX_BURST;
4156 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4157 param = ISCSI_PARAM_PDU_INORDER_EN;
4158 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4159 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4160 else if (attr == &dev_attr_sess_erl.attr)
4161 param = ISCSI_PARAM_ERL;
4162 else if (attr == &dev_attr_sess_targetname.attr)
4163 param = ISCSI_PARAM_TARGET_NAME;
4164 else if (attr == &dev_attr_sess_tpgt.attr)
4165 param = ISCSI_PARAM_TPGT;
4166 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4167 param = ISCSI_PARAM_CHAP_IN_IDX;
4168 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4169 param = ISCSI_PARAM_CHAP_OUT_IDX;
4170 else if (attr == &dev_attr_sess_password.attr)
4171 param = ISCSI_PARAM_USERNAME;
4172 else if (attr == &dev_attr_sess_password_in.attr)
4173 param = ISCSI_PARAM_USERNAME_IN;
4174 else if (attr == &dev_attr_sess_username.attr)
4175 param = ISCSI_PARAM_PASSWORD;
4176 else if (attr == &dev_attr_sess_username_in.attr)
4177 param = ISCSI_PARAM_PASSWORD_IN;
4178 else if (attr == &dev_attr_sess_fast_abort.attr)
4179 param = ISCSI_PARAM_FAST_ABORT;
4180 else if (attr == &dev_attr_sess_abort_tmo.attr)
4181 param = ISCSI_PARAM_ABORT_TMO;
4182 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4183 param = ISCSI_PARAM_LU_RESET_TMO;
4184 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4185 param = ISCSI_PARAM_TGT_RESET_TMO;
4186 else if (attr == &dev_attr_sess_ifacename.attr)
4187 param = ISCSI_PARAM_IFACE_NAME;
4188 else if (attr == &dev_attr_sess_initiatorname.attr)
4189 param = ISCSI_PARAM_INITIATOR_NAME;
4190 else if (attr == &dev_attr_sess_targetalias.attr)
4191 param = ISCSI_PARAM_TARGET_ALIAS;
4192 else if (attr == &dev_attr_sess_boot_root.attr)
4193 param = ISCSI_PARAM_BOOT_ROOT;
4194 else if (attr == &dev_attr_sess_boot_nic.attr)
4195 param = ISCSI_PARAM_BOOT_NIC;
4196 else if (attr == &dev_attr_sess_boot_target.attr)
4197 param = ISCSI_PARAM_BOOT_TARGET;
4198 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4199 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4200 else if (attr == &dev_attr_sess_discovery_session.attr)
4201 param = ISCSI_PARAM_DISCOVERY_SESS;
4202 else if (attr == &dev_attr_sess_portal_type.attr)
4203 param = ISCSI_PARAM_PORTAL_TYPE;
4204 else if (attr == &dev_attr_sess_chap_auth.attr)
4205 param = ISCSI_PARAM_CHAP_AUTH_EN;
4206 else if (attr == &dev_attr_sess_discovery_logout.attr)
4207 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4208 else if (attr == &dev_attr_sess_bidi_chap.attr)
4209 param = ISCSI_PARAM_BIDI_CHAP_EN;
4210 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4211 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4212 else if (attr == &dev_attr_sess_def_time2wait.attr)
4213 param = ISCSI_PARAM_DEF_TIME2WAIT;
4214 else if (attr == &dev_attr_sess_def_time2retain.attr)
4215 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4216 else if (attr == &dev_attr_sess_isid.attr)
4217 param = ISCSI_PARAM_ISID;
4218 else if (attr == &dev_attr_sess_tsid.attr)
4219 param = ISCSI_PARAM_TSID;
4220 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4221 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4222 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4223 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4224 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4225 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4226 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4227 return S_IRUGO | S_IWUSR;
4228 else if (attr == &dev_attr_priv_sess_state.attr)
4229 return S_IRUGO;
4230 else if (attr == &dev_attr_priv_sess_creator.attr)
4231 return S_IRUGO;
4232 else if (attr == &dev_attr_priv_sess_target_id.attr)
4233 return S_IRUGO;
4234 else {
4235 WARN_ONCE(1, "Invalid session attr");
4236 return 0;
4237 }
4238
4239 return t->attr_is_visible(ISCSI_PARAM, param);
4240 }
4241
4242 static struct attribute_group iscsi_session_group = {
4243 .attrs = iscsi_session_attrs,
4244 .is_visible = iscsi_session_attr_is_visible,
4245 };
4246
4247 /*
4248 * iSCSI host attrs
4249 */
4250 #define iscsi_host_attr_show(param) \
4251 static ssize_t \
4252 show_host_param_##param(struct device *dev, \
4253 struct device_attribute *attr, char *buf) \
4254 { \
4255 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4256 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4257 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4258 }
4259
4260 #define iscsi_host_attr(field, param) \
4261 iscsi_host_attr_show(param) \
4262 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4263 NULL);
4264
4265 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4266 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4267 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4268 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4269 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4270 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4271
4272 static struct attribute *iscsi_host_attrs[] = {
4273 &dev_attr_host_netdev.attr,
4274 &dev_attr_host_hwaddress.attr,
4275 &dev_attr_host_ipaddress.attr,
4276 &dev_attr_host_initiatorname.attr,
4277 &dev_attr_host_port_state.attr,
4278 &dev_attr_host_port_speed.attr,
4279 NULL,
4280 };
4281
4282 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4283 struct attribute *attr, int i)
4284 {
4285 struct device *cdev = container_of(kobj, struct device, kobj);
4286 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4287 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4288 int param;
4289
4290 if (attr == &dev_attr_host_netdev.attr)
4291 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4292 else if (attr == &dev_attr_host_hwaddress.attr)
4293 param = ISCSI_HOST_PARAM_HWADDRESS;
4294 else if (attr == &dev_attr_host_ipaddress.attr)
4295 param = ISCSI_HOST_PARAM_IPADDRESS;
4296 else if (attr == &dev_attr_host_initiatorname.attr)
4297 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4298 else if (attr == &dev_attr_host_port_state.attr)
4299 param = ISCSI_HOST_PARAM_PORT_STATE;
4300 else if (attr == &dev_attr_host_port_speed.attr)
4301 param = ISCSI_HOST_PARAM_PORT_SPEED;
4302 else {
4303 WARN_ONCE(1, "Invalid host attr");
4304 return 0;
4305 }
4306
4307 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4308 }
4309
4310 static struct attribute_group iscsi_host_group = {
4311 .attrs = iscsi_host_attrs,
4312 .is_visible = iscsi_host_attr_is_visible,
4313 };
4314
4315 /* convert iscsi_port_speed values to ascii string name */
4316 static const struct {
4317 enum iscsi_port_speed value;
4318 char *name;
4319 } iscsi_port_speed_names[] = {
4320 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4321 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4322 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4323 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4324 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4325 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4326 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4327 };
4328
4329 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4330 {
4331 int i;
4332 char *speed = "Unknown!";
4333 struct iscsi_cls_host *ihost = shost->shost_data;
4334 uint32_t port_speed = ihost->port_speed;
4335
4336 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4337 if (iscsi_port_speed_names[i].value & port_speed) {
4338 speed = iscsi_port_speed_names[i].name;
4339 break;
4340 }
4341 }
4342 return speed;
4343 }
4344 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4345
4346 /* convert iscsi_port_state values to ascii string name */
4347 static const struct {
4348 enum iscsi_port_state value;
4349 char *name;
4350 } iscsi_port_state_names[] = {
4351 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4352 {ISCSI_PORT_STATE_UP, "LINK UP" },
4353 };
4354
4355 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4356 {
4357 int i;
4358 char *state = "Unknown!";
4359 struct iscsi_cls_host *ihost = shost->shost_data;
4360 uint32_t port_state = ihost->port_state;
4361
4362 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4363 if (iscsi_port_state_names[i].value & port_state) {
4364 state = iscsi_port_state_names[i].name;
4365 break;
4366 }
4367 }
4368 return state;
4369 }
4370 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4371
4372 static int iscsi_session_match(struct attribute_container *cont,
4373 struct device *dev)
4374 {
4375 struct iscsi_cls_session *session;
4376 struct Scsi_Host *shost;
4377 struct iscsi_internal *priv;
4378
4379 if (!iscsi_is_session_dev(dev))
4380 return 0;
4381
4382 session = iscsi_dev_to_session(dev);
4383 shost = iscsi_session_to_shost(session);
4384 if (!shost->transportt)
4385 return 0;
4386
4387 priv = to_iscsi_internal(shost->transportt);
4388 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4389 return 0;
4390
4391 return &priv->session_cont.ac == cont;
4392 }
4393
4394 static int iscsi_conn_match(struct attribute_container *cont,
4395 struct device *dev)
4396 {
4397 struct iscsi_cls_session *session;
4398 struct iscsi_cls_conn *conn;
4399 struct Scsi_Host *shost;
4400 struct iscsi_internal *priv;
4401
4402 if (!iscsi_is_conn_dev(dev))
4403 return 0;
4404
4405 conn = iscsi_dev_to_conn(dev);
4406 session = iscsi_dev_to_session(conn->dev.parent);
4407 shost = iscsi_session_to_shost(session);
4408
4409 if (!shost->transportt)
4410 return 0;
4411
4412 priv = to_iscsi_internal(shost->transportt);
4413 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4414 return 0;
4415
4416 return &priv->conn_cont.ac == cont;
4417 }
4418
4419 static int iscsi_host_match(struct attribute_container *cont,
4420 struct device *dev)
4421 {
4422 struct Scsi_Host *shost;
4423 struct iscsi_internal *priv;
4424
4425 if (!scsi_is_host_device(dev))
4426 return 0;
4427
4428 shost = dev_to_shost(dev);
4429 if (!shost->transportt ||
4430 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4431 return 0;
4432
4433 priv = to_iscsi_internal(shost->transportt);
4434 return &priv->t.host_attrs.ac == cont;
4435 }
4436
4437 struct scsi_transport_template *
4438 iscsi_register_transport(struct iscsi_transport *tt)
4439 {
4440 struct iscsi_internal *priv;
4441 unsigned long flags;
4442 int err;
4443
4444 BUG_ON(!tt);
4445
4446 priv = iscsi_if_transport_lookup(tt);
4447 if (priv)
4448 return NULL;
4449
4450 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4451 if (!priv)
4452 return NULL;
4453 INIT_LIST_HEAD(&priv->list);
4454 priv->iscsi_transport = tt;
4455 priv->t.user_scan = iscsi_user_scan;
4456 priv->t.create_work_queue = 1;
4457
4458 priv->dev.class = &iscsi_transport_class;
4459 dev_set_name(&priv->dev, "%s", tt->name);
4460 err = device_register(&priv->dev);
4461 if (err)
4462 goto free_priv;
4463
4464 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4465 if (err)
4466 goto unregister_dev;
4467
4468 /* host parameters */
4469 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4470 priv->t.host_attrs.ac.match = iscsi_host_match;
4471 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4472 priv->t.host_size = sizeof(struct iscsi_cls_host);
4473 transport_container_register(&priv->t.host_attrs);
4474
4475 /* connection parameters */
4476 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4477 priv->conn_cont.ac.match = iscsi_conn_match;
4478 priv->conn_cont.ac.grp = &iscsi_conn_group;
4479 transport_container_register(&priv->conn_cont);
4480
4481 /* session parameters */
4482 priv->session_cont.ac.class = &iscsi_session_class.class;
4483 priv->session_cont.ac.match = iscsi_session_match;
4484 priv->session_cont.ac.grp = &iscsi_session_group;
4485 transport_container_register(&priv->session_cont);
4486
4487 spin_lock_irqsave(&iscsi_transport_lock, flags);
4488 list_add(&priv->list, &iscsi_transports);
4489 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4490
4491 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4492 return &priv->t;
4493
4494 unregister_dev:
4495 device_unregister(&priv->dev);
4496 return NULL;
4497 free_priv:
4498 kfree(priv);
4499 return NULL;
4500 }
4501 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4502
4503 int iscsi_unregister_transport(struct iscsi_transport *tt)
4504 {
4505 struct iscsi_internal *priv;
4506 unsigned long flags;
4507
4508 BUG_ON(!tt);
4509
4510 mutex_lock(&rx_queue_mutex);
4511
4512 priv = iscsi_if_transport_lookup(tt);
4513 BUG_ON (!priv);
4514
4515 spin_lock_irqsave(&iscsi_transport_lock, flags);
4516 list_del(&priv->list);
4517 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4518
4519 transport_container_unregister(&priv->conn_cont);
4520 transport_container_unregister(&priv->session_cont);
4521 transport_container_unregister(&priv->t.host_attrs);
4522
4523 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4524 device_unregister(&priv->dev);
4525 mutex_unlock(&rx_queue_mutex);
4526
4527 return 0;
4528 }
4529 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4530
4531 static __init int iscsi_transport_init(void)
4532 {
4533 int err;
4534 struct netlink_kernel_cfg cfg = {
4535 .groups = 1,
4536 .input = iscsi_if_rx,
4537 };
4538 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4539 ISCSI_TRANSPORT_VERSION);
4540
4541 atomic_set(&iscsi_session_nr, 0);
4542
4543 err = class_register(&iscsi_transport_class);
4544 if (err)
4545 return err;
4546
4547 err = class_register(&iscsi_endpoint_class);
4548 if (err)
4549 goto unregister_transport_class;
4550
4551 err = class_register(&iscsi_iface_class);
4552 if (err)
4553 goto unregister_endpoint_class;
4554
4555 err = transport_class_register(&iscsi_host_class);
4556 if (err)
4557 goto unregister_iface_class;
4558
4559 err = transport_class_register(&iscsi_connection_class);
4560 if (err)
4561 goto unregister_host_class;
4562
4563 err = transport_class_register(&iscsi_session_class);
4564 if (err)
4565 goto unregister_conn_class;
4566
4567 err = bus_register(&iscsi_flashnode_bus);
4568 if (err)
4569 goto unregister_session_class;
4570
4571 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4572 if (!nls) {
4573 err = -ENOBUFS;
4574 goto unregister_flashnode_bus;
4575 }
4576
4577 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4578 if (!iscsi_eh_timer_workq) {
4579 err = -ENOMEM;
4580 goto release_nls;
4581 }
4582
4583 return 0;
4584
4585 release_nls:
4586 netlink_kernel_release(nls);
4587 unregister_flashnode_bus:
4588 bus_unregister(&iscsi_flashnode_bus);
4589 unregister_session_class:
4590 transport_class_unregister(&iscsi_session_class);
4591 unregister_conn_class:
4592 transport_class_unregister(&iscsi_connection_class);
4593 unregister_host_class:
4594 transport_class_unregister(&iscsi_host_class);
4595 unregister_iface_class:
4596 class_unregister(&iscsi_iface_class);
4597 unregister_endpoint_class:
4598 class_unregister(&iscsi_endpoint_class);
4599 unregister_transport_class:
4600 class_unregister(&iscsi_transport_class);
4601 return err;
4602 }
4603
4604 static void __exit iscsi_transport_exit(void)
4605 {
4606 destroy_workqueue(iscsi_eh_timer_workq);
4607 netlink_kernel_release(nls);
4608 bus_unregister(&iscsi_flashnode_bus);
4609 transport_class_unregister(&iscsi_connection_class);
4610 transport_class_unregister(&iscsi_session_class);
4611 transport_class_unregister(&iscsi_host_class);
4612 class_unregister(&iscsi_endpoint_class);
4613 class_unregister(&iscsi_iface_class);
4614 class_unregister(&iscsi_transport_class);
4615 }
4616
4617 module_init(iscsi_transport_init);
4618 module_exit(iscsi_transport_exit);
4619
4620 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4621 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4622 "Alex Aizman <itn780@yahoo.com>");
4623 MODULE_DESCRIPTION("iSCSI Transport Interface");
4624 MODULE_LICENSE("GPL");
4625 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4626 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux with added FPC-III support