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UBUNTU: Ubuntu-4.13.0-45.50
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / scsi_transport_iscsi.c
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 static int dbg_session;
41 module_param_named(debug_session, dbg_session, int,
42 S_IRUGO | S_IWUSR);
43 MODULE_PARM_DESC(debug_session,
44 "Turn on debugging for sessions in scsi_transport_iscsi "
45 "module. Set to 1 to turn on, and zero to turn off. Default "
46 "is off.");
47
48 static int dbg_conn;
49 module_param_named(debug_conn, dbg_conn, int,
50 S_IRUGO | S_IWUSR);
51 MODULE_PARM_DESC(debug_conn,
52 "Turn on debugging for connections in scsi_transport_iscsi "
53 "module. Set to 1 to turn on, and zero to turn off. Default "
54 "is off.");
55
56 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
57 do { \
58 if (dbg_session) \
59 iscsi_cls_session_printk(KERN_INFO, _session, \
60 "%s: " dbg_fmt, \
61 __func__, ##arg); \
62 } while (0);
63
64 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
65 do { \
66 if (dbg_conn) \
67 iscsi_cls_conn_printk(KERN_INFO, _conn, \
68 "%s: " dbg_fmt, \
69 __func__, ##arg); \
70 } while (0);
71
72 struct iscsi_internal {
73 struct scsi_transport_template t;
74 struct iscsi_transport *iscsi_transport;
75 struct list_head list;
76 struct device dev;
77
78 struct transport_container conn_cont;
79 struct transport_container session_cont;
80 };
81
82 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
83 static struct workqueue_struct *iscsi_eh_timer_workq;
84
85 static DEFINE_IDA(iscsi_sess_ida);
86 /*
87 * list of registered transports and lock that must
88 * be held while accessing list. The iscsi_transport_lock must
89 * be acquired after the rx_queue_mutex.
90 */
91 static LIST_HEAD(iscsi_transports);
92 static DEFINE_SPINLOCK(iscsi_transport_lock);
93
94 #define to_iscsi_internal(tmpl) \
95 container_of(tmpl, struct iscsi_internal, t)
96
97 #define dev_to_iscsi_internal(_dev) \
98 container_of(_dev, struct iscsi_internal, dev)
99
100 static void iscsi_transport_release(struct device *dev)
101 {
102 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
103 kfree(priv);
104 }
105
106 /*
107 * iscsi_transport_class represents the iscsi_transports that are
108 * registered.
109 */
110 static struct class iscsi_transport_class = {
111 .name = "iscsi_transport",
112 .dev_release = iscsi_transport_release,
113 };
114
115 static ssize_t
116 show_transport_handle(struct device *dev, struct device_attribute *attr,
117 char *buf)
118 {
119 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
120 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
121 }
122 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
123
124 #define show_transport_attr(name, format) \
125 static ssize_t \
126 show_transport_##name(struct device *dev, \
127 struct device_attribute *attr,char *buf) \
128 { \
129 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
130 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
131 } \
132 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
133
134 show_transport_attr(caps, "0x%x");
135
136 static struct attribute *iscsi_transport_attrs[] = {
137 &dev_attr_handle.attr,
138 &dev_attr_caps.attr,
139 NULL,
140 };
141
142 static struct attribute_group iscsi_transport_group = {
143 .attrs = iscsi_transport_attrs,
144 };
145
146 /*
147 * iSCSI endpoint attrs
148 */
149 #define iscsi_dev_to_endpoint(_dev) \
150 container_of(_dev, struct iscsi_endpoint, dev)
151
152 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
153 struct device_attribute dev_attr_##_prefix##_##_name = \
154 __ATTR(_name,_mode,_show,_store)
155
156 static void iscsi_endpoint_release(struct device *dev)
157 {
158 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
159 kfree(ep);
160 }
161
162 static struct class iscsi_endpoint_class = {
163 .name = "iscsi_endpoint",
164 .dev_release = iscsi_endpoint_release,
165 };
166
167 static ssize_t
168 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
169 {
170 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
171 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
172 }
173 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
174
175 static struct attribute *iscsi_endpoint_attrs[] = {
176 &dev_attr_ep_handle.attr,
177 NULL,
178 };
179
180 static struct attribute_group iscsi_endpoint_group = {
181 .attrs = iscsi_endpoint_attrs,
182 };
183
184 #define ISCSI_MAX_EPID -1
185
186 static int iscsi_match_epid(struct device *dev, const void *data)
187 {
188 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
189 const uint64_t *epid = data;
190
191 return *epid == ep->id;
192 }
193
194 struct iscsi_endpoint *
195 iscsi_create_endpoint(int dd_size)
196 {
197 struct device *dev;
198 struct iscsi_endpoint *ep;
199 uint64_t id;
200 int err;
201
202 for (id = 1; id < ISCSI_MAX_EPID; id++) {
203 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
204 iscsi_match_epid);
205 if (!dev)
206 break;
207 else
208 put_device(dev);
209 }
210 if (id == ISCSI_MAX_EPID) {
211 printk(KERN_ERR "Too many connections. Max supported %u\n",
212 ISCSI_MAX_EPID - 1);
213 return NULL;
214 }
215
216 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
217 if (!ep)
218 return NULL;
219
220 ep->id = id;
221 ep->dev.class = &iscsi_endpoint_class;
222 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
223 err = device_register(&ep->dev);
224 if (err)
225 goto free_ep;
226
227 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
228 if (err)
229 goto unregister_dev;
230
231 if (dd_size)
232 ep->dd_data = &ep[1];
233 return ep;
234
235 unregister_dev:
236 device_unregister(&ep->dev);
237 return NULL;
238
239 free_ep:
240 kfree(ep);
241 return NULL;
242 }
243 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
244
245 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
246 {
247 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
248 device_unregister(&ep->dev);
249 }
250 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
251
252 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
253 {
254 struct iscsi_endpoint *ep;
255 struct device *dev;
256
257 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
258 iscsi_match_epid);
259 if (!dev)
260 return NULL;
261
262 ep = iscsi_dev_to_endpoint(dev);
263 /*
264 * we can drop this now because the interface will prevent
265 * removals and lookups from racing.
266 */
267 put_device(dev);
268 return ep;
269 }
270 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
271
272 /*
273 * Interface to display network param to sysfs
274 */
275
276 static void iscsi_iface_release(struct device *dev)
277 {
278 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
279 struct device *parent = iface->dev.parent;
280
281 kfree(iface);
282 put_device(parent);
283 }
284
285
286 static struct class iscsi_iface_class = {
287 .name = "iscsi_iface",
288 .dev_release = iscsi_iface_release,
289 };
290
291 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
292 struct device_attribute dev_attr_##_prefix##_##_name = \
293 __ATTR(_name, _mode, _show, _store)
294
295 /* iface attrs show */
296 #define iscsi_iface_attr_show(type, name, param_type, param) \
297 static ssize_t \
298 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
299 char *buf) \
300 { \
301 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
302 struct iscsi_transport *t = iface->transport; \
303 return t->get_iface_param(iface, param_type, param, buf); \
304 } \
305
306 #define iscsi_iface_net_attr(type, name, param) \
307 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
308 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
309
310 #define iscsi_iface_attr(type, name, param) \
311 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
312 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
313
314 /* generic read only ipv4 attribute */
315 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
316 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
317 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
318 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
319 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
320 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
321 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
322 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
323 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
324 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
325 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
326 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
327 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
328 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
329 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
330 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
331 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
332 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
333 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
334 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
335 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
336 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
337 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
338 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
339 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
340 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
341 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
342 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
343 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
344
345 /* generic read only ipv6 attribute */
346 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
347 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
348 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
349 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
350 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
351 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
352 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
353 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
354 iscsi_iface_net_attr(ipv6_iface, link_local_state,
355 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
356 iscsi_iface_net_attr(ipv6_iface, router_state,
357 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
358 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
359 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
360 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
361 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
362 iscsi_iface_net_attr(ipv6_iface, traffic_class,
363 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
364 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
365 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
366 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
367 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
368 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
369 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
370 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
371 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
372 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
373 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
374 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
375
376 /* common read only iface attribute */
377 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
378 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
379 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
380 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
381 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
382 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
383 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
384 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
385 iscsi_iface_net_attr(iface, tcp_nagle_disable,
386 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
387 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
388 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
389 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
390 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
391 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
392 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
393
394 /* common iscsi specific settings attributes */
395 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
396 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
397 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
398 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
399 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
400 iscsi_iface_attr(iface, data_seq_in_order,
401 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
402 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
403 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
404 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
405 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
406 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
407 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
408 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
409 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
410 iscsi_iface_attr(iface, discovery_auth_optional,
411 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
412 iscsi_iface_attr(iface, discovery_logout,
413 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
414 iscsi_iface_attr(iface, strict_login_comp_en,
415 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
416 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
417
418 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
419 struct attribute *attr, int i)
420 {
421 struct device *dev = container_of(kobj, struct device, kobj);
422 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
423 struct iscsi_transport *t = iface->transport;
424 int param;
425 int param_type;
426
427 if (attr == &dev_attr_iface_enabled.attr)
428 param = ISCSI_NET_PARAM_IFACE_ENABLE;
429 else if (attr == &dev_attr_iface_vlan_id.attr)
430 param = ISCSI_NET_PARAM_VLAN_ID;
431 else if (attr == &dev_attr_iface_vlan_priority.attr)
432 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
433 else if (attr == &dev_attr_iface_vlan_enabled.attr)
434 param = ISCSI_NET_PARAM_VLAN_ENABLED;
435 else if (attr == &dev_attr_iface_mtu.attr)
436 param = ISCSI_NET_PARAM_MTU;
437 else if (attr == &dev_attr_iface_port.attr)
438 param = ISCSI_NET_PARAM_PORT;
439 else if (attr == &dev_attr_iface_ipaddress_state.attr)
440 param = ISCSI_NET_PARAM_IPADDR_STATE;
441 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
442 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
443 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
444 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
445 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
446 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
447 else if (attr == &dev_attr_iface_tcp_wsf.attr)
448 param = ISCSI_NET_PARAM_TCP_WSF;
449 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
450 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
451 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
452 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
453 else if (attr == &dev_attr_iface_cache_id.attr)
454 param = ISCSI_NET_PARAM_CACHE_ID;
455 else if (attr == &dev_attr_iface_redirect_en.attr)
456 param = ISCSI_NET_PARAM_REDIRECT_EN;
457 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
458 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
459 else if (attr == &dev_attr_iface_header_digest.attr)
460 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
461 else if (attr == &dev_attr_iface_data_digest.attr)
462 param = ISCSI_IFACE_PARAM_DATADGST_EN;
463 else if (attr == &dev_attr_iface_immediate_data.attr)
464 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
465 else if (attr == &dev_attr_iface_initial_r2t.attr)
466 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
467 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
468 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
469 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
470 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
471 else if (attr == &dev_attr_iface_erl.attr)
472 param = ISCSI_IFACE_PARAM_ERL;
473 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
474 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
475 else if (attr == &dev_attr_iface_first_burst_len.attr)
476 param = ISCSI_IFACE_PARAM_FIRST_BURST;
477 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
478 param = ISCSI_IFACE_PARAM_MAX_R2T;
479 else if (attr == &dev_attr_iface_max_burst_len.attr)
480 param = ISCSI_IFACE_PARAM_MAX_BURST;
481 else if (attr == &dev_attr_iface_chap_auth.attr)
482 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
483 else if (attr == &dev_attr_iface_bidi_chap.attr)
484 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
485 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
486 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
487 else if (attr == &dev_attr_iface_discovery_logout.attr)
488 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
489 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
490 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
491 else if (attr == &dev_attr_iface_initiator_name.attr)
492 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
493 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
494 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
495 param = ISCSI_NET_PARAM_IPV4_ADDR;
496 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
497 param = ISCSI_NET_PARAM_IPV4_GW;
498 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
499 param = ISCSI_NET_PARAM_IPV4_SUBNET;
500 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
501 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
502 else if (attr ==
503 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
504 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
505 else if (attr ==
506 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
507 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
508 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
509 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
510 else if (attr == &dev_attr_ipv4_iface_tos.attr)
511 param = ISCSI_NET_PARAM_IPV4_TOS;
512 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
513 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
514 else if (attr ==
515 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
516 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
517 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
518 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
519 else if (attr ==
520 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
521 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
522 else if (attr ==
523 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
524 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
525 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
526 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
527 else if (attr ==
528 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
529 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
530 else if (attr ==
531 &dev_attr_ipv4_iface_fragment_disable.attr)
532 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
533 else if (attr ==
534 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
535 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
536 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
537 param = ISCSI_NET_PARAM_IPV4_TTL;
538 else
539 return 0;
540 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
541 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
542 param = ISCSI_NET_PARAM_IPV6_ADDR;
543 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
544 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
545 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
546 param = ISCSI_NET_PARAM_IPV6_ROUTER;
547 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
548 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
549 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
550 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
551 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
552 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
553 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
554 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
555 else if (attr ==
556 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
557 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
558 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
559 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
560 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
561 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
562 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
563 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
564 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
565 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
566 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
567 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
568 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
569 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
570 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
571 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
572 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
573 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
574 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
575 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
576 else
577 return 0;
578 } else {
579 WARN_ONCE(1, "Invalid iface attr");
580 return 0;
581 }
582
583 switch (param) {
584 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
585 case ISCSI_IFACE_PARAM_HDRDGST_EN:
586 case ISCSI_IFACE_PARAM_DATADGST_EN:
587 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
588 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
589 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
590 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
591 case ISCSI_IFACE_PARAM_ERL:
592 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
593 case ISCSI_IFACE_PARAM_FIRST_BURST:
594 case ISCSI_IFACE_PARAM_MAX_R2T:
595 case ISCSI_IFACE_PARAM_MAX_BURST:
596 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
597 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
598 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
599 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
600 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
601 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
602 param_type = ISCSI_IFACE_PARAM;
603 break;
604 default:
605 param_type = ISCSI_NET_PARAM;
606 }
607
608 return t->attr_is_visible(param_type, param);
609 }
610
611 static struct attribute *iscsi_iface_attrs[] = {
612 &dev_attr_iface_enabled.attr,
613 &dev_attr_iface_vlan_id.attr,
614 &dev_attr_iface_vlan_priority.attr,
615 &dev_attr_iface_vlan_enabled.attr,
616 &dev_attr_ipv4_iface_ipaddress.attr,
617 &dev_attr_ipv4_iface_gateway.attr,
618 &dev_attr_ipv4_iface_subnet.attr,
619 &dev_attr_ipv4_iface_bootproto.attr,
620 &dev_attr_ipv6_iface_ipaddress.attr,
621 &dev_attr_ipv6_iface_link_local_addr.attr,
622 &dev_attr_ipv6_iface_router_addr.attr,
623 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
624 &dev_attr_ipv6_iface_link_local_autocfg.attr,
625 &dev_attr_iface_mtu.attr,
626 &dev_attr_iface_port.attr,
627 &dev_attr_iface_ipaddress_state.attr,
628 &dev_attr_iface_delayed_ack_en.attr,
629 &dev_attr_iface_tcp_nagle_disable.attr,
630 &dev_attr_iface_tcp_wsf_disable.attr,
631 &dev_attr_iface_tcp_wsf.attr,
632 &dev_attr_iface_tcp_timer_scale.attr,
633 &dev_attr_iface_tcp_timestamp_en.attr,
634 &dev_attr_iface_cache_id.attr,
635 &dev_attr_iface_redirect_en.attr,
636 &dev_attr_iface_def_taskmgmt_tmo.attr,
637 &dev_attr_iface_header_digest.attr,
638 &dev_attr_iface_data_digest.attr,
639 &dev_attr_iface_immediate_data.attr,
640 &dev_attr_iface_initial_r2t.attr,
641 &dev_attr_iface_data_seq_in_order.attr,
642 &dev_attr_iface_data_pdu_in_order.attr,
643 &dev_attr_iface_erl.attr,
644 &dev_attr_iface_max_recv_dlength.attr,
645 &dev_attr_iface_first_burst_len.attr,
646 &dev_attr_iface_max_outstanding_r2t.attr,
647 &dev_attr_iface_max_burst_len.attr,
648 &dev_attr_iface_chap_auth.attr,
649 &dev_attr_iface_bidi_chap.attr,
650 &dev_attr_iface_discovery_auth_optional.attr,
651 &dev_attr_iface_discovery_logout.attr,
652 &dev_attr_iface_strict_login_comp_en.attr,
653 &dev_attr_iface_initiator_name.attr,
654 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
655 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
656 &dev_attr_ipv4_iface_tos_en.attr,
657 &dev_attr_ipv4_iface_tos.attr,
658 &dev_attr_ipv4_iface_grat_arp_en.attr,
659 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
660 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
661 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
662 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
663 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
664 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
665 &dev_attr_ipv4_iface_fragment_disable.attr,
666 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
667 &dev_attr_ipv4_iface_ttl.attr,
668 &dev_attr_ipv6_iface_link_local_state.attr,
669 &dev_attr_ipv6_iface_router_state.attr,
670 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
671 &dev_attr_ipv6_iface_mld_en.attr,
672 &dev_attr_ipv6_iface_flow_label.attr,
673 &dev_attr_ipv6_iface_traffic_class.attr,
674 &dev_attr_ipv6_iface_hop_limit.attr,
675 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
676 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
677 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
678 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
679 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
680 NULL,
681 };
682
683 static struct attribute_group iscsi_iface_group = {
684 .attrs = iscsi_iface_attrs,
685 .is_visible = iscsi_iface_attr_is_visible,
686 };
687
688 /* convert iscsi_ipaddress_state values to ascii string name */
689 static const struct {
690 enum iscsi_ipaddress_state value;
691 char *name;
692 } iscsi_ipaddress_state_names[] = {
693 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
694 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
695 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
696 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
697 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
698 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
699 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
700 };
701
702 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
703 {
704 int i;
705 char *state = NULL;
706
707 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
708 if (iscsi_ipaddress_state_names[i].value == port_state) {
709 state = iscsi_ipaddress_state_names[i].name;
710 break;
711 }
712 }
713 return state;
714 }
715 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
716
717 /* convert iscsi_router_state values to ascii string name */
718 static const struct {
719 enum iscsi_router_state value;
720 char *name;
721 } iscsi_router_state_names[] = {
722 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
723 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
724 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
725 {ISCSI_ROUTER_STATE_STALE, "Stale" },
726 };
727
728 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
729 {
730 int i;
731 char *state = NULL;
732
733 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
734 if (iscsi_router_state_names[i].value == router_state) {
735 state = iscsi_router_state_names[i].name;
736 break;
737 }
738 }
739 return state;
740 }
741 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
742
743 struct iscsi_iface *
744 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
745 uint32_t iface_type, uint32_t iface_num, int dd_size)
746 {
747 struct iscsi_iface *iface;
748 int err;
749
750 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
751 if (!iface)
752 return NULL;
753
754 iface->transport = transport;
755 iface->iface_type = iface_type;
756 iface->iface_num = iface_num;
757 iface->dev.release = iscsi_iface_release;
758 iface->dev.class = &iscsi_iface_class;
759 /* parent reference released in iscsi_iface_release */
760 iface->dev.parent = get_device(&shost->shost_gendev);
761 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
762 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
763 iface_num);
764 else
765 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
766 iface_num);
767
768 err = device_register(&iface->dev);
769 if (err)
770 goto free_iface;
771
772 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
773 if (err)
774 goto unreg_iface;
775
776 if (dd_size)
777 iface->dd_data = &iface[1];
778 return iface;
779
780 unreg_iface:
781 device_unregister(&iface->dev);
782 return NULL;
783
784 free_iface:
785 put_device(iface->dev.parent);
786 kfree(iface);
787 return NULL;
788 }
789 EXPORT_SYMBOL_GPL(iscsi_create_iface);
790
791 void iscsi_destroy_iface(struct iscsi_iface *iface)
792 {
793 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
794 device_unregister(&iface->dev);
795 }
796 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
797
798 /*
799 * Interface to display flash node params to sysfs
800 */
801
802 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
803 struct device_attribute dev_attr_##_prefix##_##_name = \
804 __ATTR(_name, _mode, _show, _store)
805
806 /* flash node session attrs show */
807 #define iscsi_flashnode_sess_attr_show(type, name, param) \
808 static ssize_t \
809 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
810 char *buf) \
811 { \
812 struct iscsi_bus_flash_session *fnode_sess = \
813 iscsi_dev_to_flash_session(dev);\
814 struct iscsi_transport *t = fnode_sess->transport; \
815 return t->get_flashnode_param(fnode_sess, param, buf); \
816 } \
817
818
819 #define iscsi_flashnode_sess_attr(type, name, param) \
820 iscsi_flashnode_sess_attr_show(type, name, param) \
821 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
822 show_##type##_##name, NULL);
823
824 /* Flash node session attributes */
825
826 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
827 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
828 iscsi_flashnode_sess_attr(fnode, discovery_session,
829 ISCSI_FLASHNODE_DISCOVERY_SESS);
830 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
831 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
832 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
833 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
834 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
835 ISCSI_FLASHNODE_DATASEQ_INORDER);
836 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
837 ISCSI_FLASHNODE_PDU_INORDER);
838 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
839 iscsi_flashnode_sess_attr(fnode, discovery_logout,
840 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
841 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
842 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
843 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
844 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
845 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
846 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
847 iscsi_flashnode_sess_attr(fnode, def_time2retain,
848 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
849 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
850 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
851 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
852 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
853 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
854 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
855 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
856 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
857 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
858 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
859 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
860 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
861 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
862 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
863 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
864 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
865 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
866 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
867 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
868 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
869
870 static struct attribute *iscsi_flashnode_sess_attrs[] = {
871 &dev_attr_fnode_auto_snd_tgt_disable.attr,
872 &dev_attr_fnode_discovery_session.attr,
873 &dev_attr_fnode_portal_type.attr,
874 &dev_attr_fnode_entry_enable.attr,
875 &dev_attr_fnode_immediate_data.attr,
876 &dev_attr_fnode_initial_r2t.attr,
877 &dev_attr_fnode_data_seq_in_order.attr,
878 &dev_attr_fnode_data_pdu_in_order.attr,
879 &dev_attr_fnode_chap_auth.attr,
880 &dev_attr_fnode_discovery_logout.attr,
881 &dev_attr_fnode_bidi_chap.attr,
882 &dev_attr_fnode_discovery_auth_optional.attr,
883 &dev_attr_fnode_erl.attr,
884 &dev_attr_fnode_first_burst_len.attr,
885 &dev_attr_fnode_def_time2wait.attr,
886 &dev_attr_fnode_def_time2retain.attr,
887 &dev_attr_fnode_max_outstanding_r2t.attr,
888 &dev_attr_fnode_isid.attr,
889 &dev_attr_fnode_tsid.attr,
890 &dev_attr_fnode_max_burst_len.attr,
891 &dev_attr_fnode_def_taskmgmt_tmo.attr,
892 &dev_attr_fnode_targetalias.attr,
893 &dev_attr_fnode_targetname.attr,
894 &dev_attr_fnode_tpgt.attr,
895 &dev_attr_fnode_discovery_parent_idx.attr,
896 &dev_attr_fnode_discovery_parent_type.attr,
897 &dev_attr_fnode_chap_in_idx.attr,
898 &dev_attr_fnode_chap_out_idx.attr,
899 &dev_attr_fnode_username.attr,
900 &dev_attr_fnode_username_in.attr,
901 &dev_attr_fnode_password.attr,
902 &dev_attr_fnode_password_in.attr,
903 &dev_attr_fnode_is_boot_target.attr,
904 NULL,
905 };
906
907 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
908 struct attribute *attr,
909 int i)
910 {
911 struct device *dev = container_of(kobj, struct device, kobj);
912 struct iscsi_bus_flash_session *fnode_sess =
913 iscsi_dev_to_flash_session(dev);
914 struct iscsi_transport *t = fnode_sess->transport;
915 int param;
916
917 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
918 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
919 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
920 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
921 } else if (attr == &dev_attr_fnode_portal_type.attr) {
922 param = ISCSI_FLASHNODE_PORTAL_TYPE;
923 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
924 param = ISCSI_FLASHNODE_ENTRY_EN;
925 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
926 param = ISCSI_FLASHNODE_IMM_DATA_EN;
927 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
928 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
929 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
930 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
931 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
932 param = ISCSI_FLASHNODE_PDU_INORDER;
933 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
934 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
935 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
936 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
937 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
938 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
939 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
940 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
941 } else if (attr == &dev_attr_fnode_erl.attr) {
942 param = ISCSI_FLASHNODE_ERL;
943 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
944 param = ISCSI_FLASHNODE_FIRST_BURST;
945 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
946 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
947 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
948 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
949 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
950 param = ISCSI_FLASHNODE_MAX_R2T;
951 } else if (attr == &dev_attr_fnode_isid.attr) {
952 param = ISCSI_FLASHNODE_ISID;
953 } else if (attr == &dev_attr_fnode_tsid.attr) {
954 param = ISCSI_FLASHNODE_TSID;
955 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
956 param = ISCSI_FLASHNODE_MAX_BURST;
957 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
958 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
959 } else if (attr == &dev_attr_fnode_targetalias.attr) {
960 param = ISCSI_FLASHNODE_ALIAS;
961 } else if (attr == &dev_attr_fnode_targetname.attr) {
962 param = ISCSI_FLASHNODE_NAME;
963 } else if (attr == &dev_attr_fnode_tpgt.attr) {
964 param = ISCSI_FLASHNODE_TPGT;
965 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
966 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
967 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
968 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
969 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
970 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
971 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
972 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
973 } else if (attr == &dev_attr_fnode_username.attr) {
974 param = ISCSI_FLASHNODE_USERNAME;
975 } else if (attr == &dev_attr_fnode_username_in.attr) {
976 param = ISCSI_FLASHNODE_USERNAME_IN;
977 } else if (attr == &dev_attr_fnode_password.attr) {
978 param = ISCSI_FLASHNODE_PASSWORD;
979 } else if (attr == &dev_attr_fnode_password_in.attr) {
980 param = ISCSI_FLASHNODE_PASSWORD_IN;
981 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
982 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
983 } else {
984 WARN_ONCE(1, "Invalid flashnode session attr");
985 return 0;
986 }
987
988 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
989 }
990
991 static struct attribute_group iscsi_flashnode_sess_attr_group = {
992 .attrs = iscsi_flashnode_sess_attrs,
993 .is_visible = iscsi_flashnode_sess_attr_is_visible,
994 };
995
996 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
997 &iscsi_flashnode_sess_attr_group,
998 NULL,
999 };
1000
1001 static void iscsi_flashnode_sess_release(struct device *dev)
1002 {
1003 struct iscsi_bus_flash_session *fnode_sess =
1004 iscsi_dev_to_flash_session(dev);
1005
1006 kfree(fnode_sess->targetname);
1007 kfree(fnode_sess->targetalias);
1008 kfree(fnode_sess->portal_type);
1009 kfree(fnode_sess);
1010 }
1011
1012 static struct device_type iscsi_flashnode_sess_dev_type = {
1013 .name = "iscsi_flashnode_sess_dev_type",
1014 .groups = iscsi_flashnode_sess_attr_groups,
1015 .release = iscsi_flashnode_sess_release,
1016 };
1017
1018 /* flash node connection attrs show */
1019 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1020 static ssize_t \
1021 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1022 char *buf) \
1023 { \
1024 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1025 struct iscsi_bus_flash_session *fnode_sess = \
1026 iscsi_flash_conn_to_flash_session(fnode_conn);\
1027 struct iscsi_transport *t = fnode_conn->transport; \
1028 return t->get_flashnode_param(fnode_sess, param, buf); \
1029 } \
1030
1031
1032 #define iscsi_flashnode_conn_attr(type, name, param) \
1033 iscsi_flashnode_conn_attr_show(type, name, param) \
1034 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1035 show_##type##_##name, NULL);
1036
1037 /* Flash node connection attributes */
1038
1039 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1040 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1041 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1042 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1043 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1044 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1045 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1046 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1047 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1048 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1049 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1050 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1051 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1052 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1053 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1054 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1055 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1056 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1057 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1058 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1059 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1060 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1061 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1062 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1063 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1064 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1065 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1066 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1067 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1068 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1069 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1070 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1071 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1072 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1073 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1074 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1075 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1076 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1077 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1078
1079 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1080 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1081 &dev_attr_fnode_header_digest.attr,
1082 &dev_attr_fnode_data_digest.attr,
1083 &dev_attr_fnode_snack_req.attr,
1084 &dev_attr_fnode_tcp_timestamp_stat.attr,
1085 &dev_attr_fnode_tcp_nagle_disable.attr,
1086 &dev_attr_fnode_tcp_wsf_disable.attr,
1087 &dev_attr_fnode_tcp_timer_scale.attr,
1088 &dev_attr_fnode_tcp_timestamp_enable.attr,
1089 &dev_attr_fnode_fragment_disable.attr,
1090 &dev_attr_fnode_max_recv_dlength.attr,
1091 &dev_attr_fnode_max_xmit_dlength.attr,
1092 &dev_attr_fnode_keepalive_tmo.attr,
1093 &dev_attr_fnode_port.attr,
1094 &dev_attr_fnode_ipaddress.attr,
1095 &dev_attr_fnode_redirect_ipaddr.attr,
1096 &dev_attr_fnode_max_segment_size.attr,
1097 &dev_attr_fnode_local_port.attr,
1098 &dev_attr_fnode_ipv4_tos.attr,
1099 &dev_attr_fnode_ipv6_traffic_class.attr,
1100 &dev_attr_fnode_ipv6_flow_label.attr,
1101 &dev_attr_fnode_link_local_ipv6.attr,
1102 &dev_attr_fnode_tcp_xmit_wsf.attr,
1103 &dev_attr_fnode_tcp_recv_wsf.attr,
1104 &dev_attr_fnode_statsn.attr,
1105 &dev_attr_fnode_exp_statsn.attr,
1106 NULL,
1107 };
1108
1109 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1110 struct attribute *attr,
1111 int i)
1112 {
1113 struct device *dev = container_of(kobj, struct device, kobj);
1114 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1115 struct iscsi_transport *t = fnode_conn->transport;
1116 int param;
1117
1118 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1119 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1120 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1121 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1122 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1123 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1124 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1125 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1126 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1127 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1128 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1129 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1130 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1131 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1132 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1133 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1134 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1135 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1136 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1137 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1138 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1139 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1140 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1141 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1142 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1143 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1144 } else if (attr == &dev_attr_fnode_port.attr) {
1145 param = ISCSI_FLASHNODE_PORT;
1146 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1147 param = ISCSI_FLASHNODE_IPADDR;
1148 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1149 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1150 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1151 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1152 } else if (attr == &dev_attr_fnode_local_port.attr) {
1153 param = ISCSI_FLASHNODE_LOCAL_PORT;
1154 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1155 param = ISCSI_FLASHNODE_IPV4_TOS;
1156 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1157 param = ISCSI_FLASHNODE_IPV6_TC;
1158 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1159 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1160 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1161 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1162 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1163 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1164 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1165 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1166 } else if (attr == &dev_attr_fnode_statsn.attr) {
1167 param = ISCSI_FLASHNODE_STATSN;
1168 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1169 param = ISCSI_FLASHNODE_EXP_STATSN;
1170 } else {
1171 WARN_ONCE(1, "Invalid flashnode connection attr");
1172 return 0;
1173 }
1174
1175 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1176 }
1177
1178 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1179 .attrs = iscsi_flashnode_conn_attrs,
1180 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1181 };
1182
1183 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1184 &iscsi_flashnode_conn_attr_group,
1185 NULL,
1186 };
1187
1188 static void iscsi_flashnode_conn_release(struct device *dev)
1189 {
1190 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1191
1192 kfree(fnode_conn->ipaddress);
1193 kfree(fnode_conn->redirect_ipaddr);
1194 kfree(fnode_conn->link_local_ipv6_addr);
1195 kfree(fnode_conn);
1196 }
1197
1198 static struct device_type iscsi_flashnode_conn_dev_type = {
1199 .name = "iscsi_flashnode_conn_dev_type",
1200 .groups = iscsi_flashnode_conn_attr_groups,
1201 .release = iscsi_flashnode_conn_release,
1202 };
1203
1204 static struct bus_type iscsi_flashnode_bus;
1205
1206 int iscsi_flashnode_bus_match(struct device *dev,
1207 struct device_driver *drv)
1208 {
1209 if (dev->bus == &iscsi_flashnode_bus)
1210 return 1;
1211 return 0;
1212 }
1213 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1214
1215 static struct bus_type iscsi_flashnode_bus = {
1216 .name = "iscsi_flashnode",
1217 .match = &iscsi_flashnode_bus_match,
1218 };
1219
1220 /**
1221 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1222 * @shost: pointer to host data
1223 * @index: index of flashnode to add in sysfs
1224 * @transport: pointer to transport data
1225 * @dd_size: total size to allocate
1226 *
1227 * Adds a sysfs entry for the flashnode session attributes
1228 *
1229 * Returns:
1230 * pointer to allocated flashnode sess on success
1231 * %NULL on failure
1232 */
1233 struct iscsi_bus_flash_session *
1234 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1235 struct iscsi_transport *transport,
1236 int dd_size)
1237 {
1238 struct iscsi_bus_flash_session *fnode_sess;
1239 int err;
1240
1241 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1242 if (!fnode_sess)
1243 return NULL;
1244
1245 fnode_sess->transport = transport;
1246 fnode_sess->target_id = index;
1247 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1248 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1249 fnode_sess->dev.parent = &shost->shost_gendev;
1250 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1251 shost->host_no, index);
1252
1253 err = device_register(&fnode_sess->dev);
1254 if (err)
1255 goto free_fnode_sess;
1256
1257 if (dd_size)
1258 fnode_sess->dd_data = &fnode_sess[1];
1259
1260 return fnode_sess;
1261
1262 free_fnode_sess:
1263 kfree(fnode_sess);
1264 return NULL;
1265 }
1266 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1267
1268 /**
1269 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1270 * @shost: pointer to host data
1271 * @fnode_sess: pointer to the parent flashnode session entry
1272 * @transport: pointer to transport data
1273 * @dd_size: total size to allocate
1274 *
1275 * Adds a sysfs entry for the flashnode connection attributes
1276 *
1277 * Returns:
1278 * pointer to allocated flashnode conn on success
1279 * %NULL on failure
1280 */
1281 struct iscsi_bus_flash_conn *
1282 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1283 struct iscsi_bus_flash_session *fnode_sess,
1284 struct iscsi_transport *transport,
1285 int dd_size)
1286 {
1287 struct iscsi_bus_flash_conn *fnode_conn;
1288 int err;
1289
1290 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1291 if (!fnode_conn)
1292 return NULL;
1293
1294 fnode_conn->transport = transport;
1295 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1296 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1297 fnode_conn->dev.parent = &fnode_sess->dev;
1298 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1299 shost->host_no, fnode_sess->target_id);
1300
1301 err = device_register(&fnode_conn->dev);
1302 if (err)
1303 goto free_fnode_conn;
1304
1305 if (dd_size)
1306 fnode_conn->dd_data = &fnode_conn[1];
1307
1308 return fnode_conn;
1309
1310 free_fnode_conn:
1311 kfree(fnode_conn);
1312 return NULL;
1313 }
1314 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1315
1316 /**
1317 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1318 * @dev: device to verify
1319 * @data: pointer to data containing value to use for verification
1320 *
1321 * Verifies if the passed device is flashnode conn device
1322 *
1323 * Returns:
1324 * 1 on success
1325 * 0 on failure
1326 */
1327 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1328 {
1329 return dev->bus == &iscsi_flashnode_bus;
1330 }
1331
1332 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1333 {
1334 device_unregister(&fnode_conn->dev);
1335 return 0;
1336 }
1337
1338 static int flashnode_match_index(struct device *dev, void *data)
1339 {
1340 struct iscsi_bus_flash_session *fnode_sess = NULL;
1341 int ret = 0;
1342
1343 if (!iscsi_flashnode_bus_match(dev, NULL))
1344 goto exit_match_index;
1345
1346 fnode_sess = iscsi_dev_to_flash_session(dev);
1347 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1348
1349 exit_match_index:
1350 return ret;
1351 }
1352
1353 /**
1354 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1355 * @shost: pointer to host data
1356 * @idx: index to match
1357 *
1358 * Finds the flashnode session object for the passed index
1359 *
1360 * Returns:
1361 * pointer to found flashnode session object on success
1362 * %NULL on failure
1363 */
1364 static struct iscsi_bus_flash_session *
1365 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1366 {
1367 struct iscsi_bus_flash_session *fnode_sess = NULL;
1368 struct device *dev;
1369
1370 dev = device_find_child(&shost->shost_gendev, &idx,
1371 flashnode_match_index);
1372 if (dev)
1373 fnode_sess = iscsi_dev_to_flash_session(dev);
1374
1375 return fnode_sess;
1376 }
1377
1378 /**
1379 * iscsi_find_flashnode_sess - finds flashnode session entry
1380 * @shost: pointer to host data
1381 * @data: pointer to data containing value to use for comparison
1382 * @fn: function pointer that does actual comparison
1383 *
1384 * Finds the flashnode session object comparing the data passed using logic
1385 * defined in passed function pointer
1386 *
1387 * Returns:
1388 * pointer to found flashnode session device object on success
1389 * %NULL on failure
1390 */
1391 struct device *
1392 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1393 int (*fn)(struct device *dev, void *data))
1394 {
1395 return device_find_child(&shost->shost_gendev, data, fn);
1396 }
1397 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1398
1399 /**
1400 * iscsi_find_flashnode_conn - finds flashnode connection entry
1401 * @fnode_sess: pointer to parent flashnode session entry
1402 *
1403 * Finds the flashnode connection object comparing the data passed using logic
1404 * defined in passed function pointer
1405 *
1406 * Returns:
1407 * pointer to found flashnode connection device object on success
1408 * %NULL on failure
1409 */
1410 struct device *
1411 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1412 {
1413 return device_find_child(&fnode_sess->dev, NULL,
1414 iscsi_is_flashnode_conn_dev);
1415 }
1416 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1417
1418 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1419 {
1420 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1421 return 0;
1422
1423 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1424 }
1425
1426 /**
1427 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1428 * @fnode_sess: pointer to flashnode session entry to be destroyed
1429 *
1430 * Deletes the flashnode session entry and all children flashnode connection
1431 * entries from sysfs
1432 */
1433 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1434 {
1435 int err;
1436
1437 err = device_for_each_child(&fnode_sess->dev, NULL,
1438 iscsi_iter_destroy_flashnode_conn_fn);
1439 if (err)
1440 pr_err("Could not delete all connections for %s. Error %d.\n",
1441 fnode_sess->dev.kobj.name, err);
1442
1443 device_unregister(&fnode_sess->dev);
1444 }
1445 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1446
1447 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1448 {
1449 if (!iscsi_flashnode_bus_match(dev, NULL))
1450 return 0;
1451
1452 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1453 return 0;
1454 }
1455
1456 /**
1457 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1458 * @shost: pointer to host data
1459 *
1460 * Destroys all the flashnode session entries and all corresponding children
1461 * flashnode connection entries from sysfs
1462 */
1463 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1464 {
1465 device_for_each_child(&shost->shost_gendev, NULL,
1466 iscsi_iter_destroy_flashnode_fn);
1467 }
1468 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1469
1470 /*
1471 * BSG support
1472 */
1473 /**
1474 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1475 * @job: bsg job to be processed
1476 */
1477 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1478 {
1479 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1480 struct iscsi_bsg_request *req = job->request;
1481 struct iscsi_bsg_reply *reply = job->reply;
1482 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1483 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1484 int ret;
1485
1486 /* check if we have the msgcode value at least */
1487 if (job->request_len < sizeof(uint32_t)) {
1488 ret = -ENOMSG;
1489 goto fail_host_msg;
1490 }
1491
1492 /* Validate the host command */
1493 switch (req->msgcode) {
1494 case ISCSI_BSG_HST_VENDOR:
1495 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1496 if ((shost->hostt->vendor_id == 0L) ||
1497 (req->rqst_data.h_vendor.vendor_id !=
1498 shost->hostt->vendor_id)) {
1499 ret = -ESRCH;
1500 goto fail_host_msg;
1501 }
1502 break;
1503 default:
1504 ret = -EBADR;
1505 goto fail_host_msg;
1506 }
1507
1508 /* check if we really have all the request data needed */
1509 if (job->request_len < cmdlen) {
1510 ret = -ENOMSG;
1511 goto fail_host_msg;
1512 }
1513
1514 ret = i->iscsi_transport->bsg_request(job);
1515 if (!ret)
1516 return 0;
1517
1518 fail_host_msg:
1519 /* return the errno failure code as the only status */
1520 BUG_ON(job->reply_len < sizeof(uint32_t));
1521 reply->reply_payload_rcv_len = 0;
1522 reply->result = ret;
1523 job->reply_len = sizeof(uint32_t);
1524 bsg_job_done(job, ret, 0);
1525 return 0;
1526 }
1527
1528 /**
1529 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1530 * @shost: shost for iscsi_host
1531 * @ihost: iscsi_cls_host adding the structures to
1532 */
1533 static int
1534 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1535 {
1536 struct device *dev = &shost->shost_gendev;
1537 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1538 struct request_queue *q;
1539 char bsg_name[20];
1540
1541 if (!i->iscsi_transport->bsg_request)
1542 return -ENOTSUPP;
1543
1544 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1545 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, 0);
1546 if (IS_ERR(q)) {
1547 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1548 "initialize - no request queue\n");
1549 return PTR_ERR(q);
1550 }
1551 __scsi_init_queue(shost, q);
1552
1553 ihost->bsg_q = q;
1554 return 0;
1555 }
1556
1557 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1558 struct device *cdev)
1559 {
1560 struct Scsi_Host *shost = dev_to_shost(dev);
1561 struct iscsi_cls_host *ihost = shost->shost_data;
1562
1563 memset(ihost, 0, sizeof(*ihost));
1564 atomic_set(&ihost->nr_scans, 0);
1565 mutex_init(&ihost->mutex);
1566
1567 iscsi_bsg_host_add(shost, ihost);
1568 /* ignore any bsg add error - we just can't do sgio */
1569
1570 return 0;
1571 }
1572
1573 static int iscsi_remove_host(struct transport_container *tc,
1574 struct device *dev, struct device *cdev)
1575 {
1576 struct Scsi_Host *shost = dev_to_shost(dev);
1577 struct iscsi_cls_host *ihost = shost->shost_data;
1578
1579 if (ihost->bsg_q) {
1580 bsg_unregister_queue(ihost->bsg_q);
1581 blk_cleanup_queue(ihost->bsg_q);
1582 }
1583 return 0;
1584 }
1585
1586 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1587 "iscsi_host",
1588 iscsi_setup_host,
1589 iscsi_remove_host,
1590 NULL);
1591
1592 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1593 "iscsi_session",
1594 NULL,
1595 NULL,
1596 NULL);
1597
1598 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1599 "iscsi_connection",
1600 NULL,
1601 NULL,
1602 NULL);
1603
1604 static struct sock *nls;
1605 static DEFINE_MUTEX(rx_queue_mutex);
1606
1607 static LIST_HEAD(sesslist);
1608 static DEFINE_SPINLOCK(sesslock);
1609 static LIST_HEAD(connlist);
1610 static DEFINE_SPINLOCK(connlock);
1611
1612 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1613 {
1614 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1615 return sess->sid;
1616 }
1617
1618 /*
1619 * Returns the matching session to a given sid
1620 */
1621 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1622 {
1623 unsigned long flags;
1624 struct iscsi_cls_session *sess;
1625
1626 spin_lock_irqsave(&sesslock, flags);
1627 list_for_each_entry(sess, &sesslist, sess_list) {
1628 if (sess->sid == sid) {
1629 spin_unlock_irqrestore(&sesslock, flags);
1630 return sess;
1631 }
1632 }
1633 spin_unlock_irqrestore(&sesslock, flags);
1634 return NULL;
1635 }
1636
1637 /*
1638 * Returns the matching connection to a given sid / cid tuple
1639 */
1640 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1641 {
1642 unsigned long flags;
1643 struct iscsi_cls_conn *conn;
1644
1645 spin_lock_irqsave(&connlock, flags);
1646 list_for_each_entry(conn, &connlist, conn_list) {
1647 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1648 spin_unlock_irqrestore(&connlock, flags);
1649 return conn;
1650 }
1651 }
1652 spin_unlock_irqrestore(&connlock, flags);
1653 return NULL;
1654 }
1655
1656 /*
1657 * The following functions can be used by LLDs that allocate
1658 * their own scsi_hosts or by software iscsi LLDs
1659 */
1660 static struct {
1661 int value;
1662 char *name;
1663 } iscsi_session_state_names[] = {
1664 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1665 { ISCSI_SESSION_FAILED, "FAILED" },
1666 { ISCSI_SESSION_FREE, "FREE" },
1667 };
1668
1669 static const char *iscsi_session_state_name(int state)
1670 {
1671 int i;
1672 char *name = NULL;
1673
1674 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1675 if (iscsi_session_state_names[i].value == state) {
1676 name = iscsi_session_state_names[i].name;
1677 break;
1678 }
1679 }
1680 return name;
1681 }
1682
1683 int iscsi_session_chkready(struct iscsi_cls_session *session)
1684 {
1685 unsigned long flags;
1686 int err;
1687
1688 spin_lock_irqsave(&session->lock, flags);
1689 switch (session->state) {
1690 case ISCSI_SESSION_LOGGED_IN:
1691 err = 0;
1692 break;
1693 case ISCSI_SESSION_FAILED:
1694 err = DID_IMM_RETRY << 16;
1695 break;
1696 case ISCSI_SESSION_FREE:
1697 err = DID_TRANSPORT_FAILFAST << 16;
1698 break;
1699 default:
1700 err = DID_NO_CONNECT << 16;
1701 break;
1702 }
1703 spin_unlock_irqrestore(&session->lock, flags);
1704 return err;
1705 }
1706 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1707
1708 int iscsi_is_session_online(struct iscsi_cls_session *session)
1709 {
1710 unsigned long flags;
1711 int ret = 0;
1712
1713 spin_lock_irqsave(&session->lock, flags);
1714 if (session->state == ISCSI_SESSION_LOGGED_IN)
1715 ret = 1;
1716 spin_unlock_irqrestore(&session->lock, flags);
1717 return ret;
1718 }
1719 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1720
1721 static void iscsi_session_release(struct device *dev)
1722 {
1723 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1724 struct Scsi_Host *shost;
1725
1726 shost = iscsi_session_to_shost(session);
1727 scsi_host_put(shost);
1728 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1729 kfree(session);
1730 }
1731
1732 int iscsi_is_session_dev(const struct device *dev)
1733 {
1734 return dev->release == iscsi_session_release;
1735 }
1736 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1737
1738 static int iscsi_iter_session_fn(struct device *dev, void *data)
1739 {
1740 void (* fn) (struct iscsi_cls_session *) = data;
1741
1742 if (!iscsi_is_session_dev(dev))
1743 return 0;
1744 fn(iscsi_dev_to_session(dev));
1745 return 0;
1746 }
1747
1748 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1749 void (*fn)(struct iscsi_cls_session *))
1750 {
1751 device_for_each_child(&shost->shost_gendev, fn,
1752 iscsi_iter_session_fn);
1753 }
1754 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1755
1756 /**
1757 * iscsi_scan_finished - helper to report when running scans are done
1758 * @shost: scsi host
1759 * @time: scan run time
1760 *
1761 * This function can be used by drives like qla4xxx to report to the scsi
1762 * layer when the scans it kicked off at module load time are done.
1763 */
1764 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1765 {
1766 struct iscsi_cls_host *ihost = shost->shost_data;
1767 /*
1768 * qla4xxx will have kicked off some session unblocks before calling
1769 * scsi_scan_host, so just wait for them to complete.
1770 */
1771 return !atomic_read(&ihost->nr_scans);
1772 }
1773 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1774
1775 struct iscsi_scan_data {
1776 unsigned int channel;
1777 unsigned int id;
1778 u64 lun;
1779 enum scsi_scan_mode rescan;
1780 };
1781
1782 static int iscsi_user_scan_session(struct device *dev, void *data)
1783 {
1784 struct iscsi_scan_data *scan_data = data;
1785 struct iscsi_cls_session *session;
1786 struct Scsi_Host *shost;
1787 struct iscsi_cls_host *ihost;
1788 unsigned long flags;
1789 unsigned int id;
1790
1791 if (!iscsi_is_session_dev(dev))
1792 return 0;
1793
1794 session = iscsi_dev_to_session(dev);
1795
1796 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1797
1798 shost = iscsi_session_to_shost(session);
1799 ihost = shost->shost_data;
1800
1801 mutex_lock(&ihost->mutex);
1802 spin_lock_irqsave(&session->lock, flags);
1803 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1804 spin_unlock_irqrestore(&session->lock, flags);
1805 goto user_scan_exit;
1806 }
1807 id = session->target_id;
1808 spin_unlock_irqrestore(&session->lock, flags);
1809
1810 if (id != ISCSI_MAX_TARGET) {
1811 if ((scan_data->channel == SCAN_WILD_CARD ||
1812 scan_data->channel == 0) &&
1813 (scan_data->id == SCAN_WILD_CARD ||
1814 scan_data->id == id))
1815 scsi_scan_target(&session->dev, 0, id,
1816 scan_data->lun, scan_data->rescan);
1817 }
1818
1819 user_scan_exit:
1820 mutex_unlock(&ihost->mutex);
1821 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1822 return 0;
1823 }
1824
1825 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1826 uint id, u64 lun)
1827 {
1828 struct iscsi_scan_data scan_data;
1829
1830 scan_data.channel = channel;
1831 scan_data.id = id;
1832 scan_data.lun = lun;
1833 scan_data.rescan = SCSI_SCAN_MANUAL;
1834
1835 return device_for_each_child(&shost->shost_gendev, &scan_data,
1836 iscsi_user_scan_session);
1837 }
1838
1839 static void iscsi_scan_session(struct work_struct *work)
1840 {
1841 struct iscsi_cls_session *session =
1842 container_of(work, struct iscsi_cls_session, scan_work);
1843 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1844 struct iscsi_cls_host *ihost = shost->shost_data;
1845 struct iscsi_scan_data scan_data;
1846
1847 scan_data.channel = 0;
1848 scan_data.id = SCAN_WILD_CARD;
1849 scan_data.lun = SCAN_WILD_CARD;
1850 scan_data.rescan = SCSI_SCAN_RESCAN;
1851
1852 iscsi_user_scan_session(&session->dev, &scan_data);
1853 atomic_dec(&ihost->nr_scans);
1854 }
1855
1856 /**
1857 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1858 * @cmd: scsi cmd passed to scsi eh handler
1859 *
1860 * If the session is down this function will wait for the recovery
1861 * timer to fire or for the session to be logged back in. If the
1862 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1863 * should pass this error value to the scsi eh.
1864 */
1865 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1866 {
1867 struct iscsi_cls_session *session =
1868 starget_to_session(scsi_target(cmd->device));
1869 unsigned long flags;
1870 int ret = 0;
1871
1872 spin_lock_irqsave(&session->lock, flags);
1873 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1874 if (session->state == ISCSI_SESSION_FREE) {
1875 ret = FAST_IO_FAIL;
1876 break;
1877 }
1878 spin_unlock_irqrestore(&session->lock, flags);
1879 msleep(1000);
1880 spin_lock_irqsave(&session->lock, flags);
1881 }
1882 spin_unlock_irqrestore(&session->lock, flags);
1883 return ret;
1884 }
1885 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1886
1887 static void session_recovery_timedout(struct work_struct *work)
1888 {
1889 struct iscsi_cls_session *session =
1890 container_of(work, struct iscsi_cls_session,
1891 recovery_work.work);
1892 unsigned long flags;
1893
1894 iscsi_cls_session_printk(KERN_INFO, session,
1895 "session recovery timed out after %d secs\n",
1896 session->recovery_tmo);
1897
1898 spin_lock_irqsave(&session->lock, flags);
1899 switch (session->state) {
1900 case ISCSI_SESSION_FAILED:
1901 session->state = ISCSI_SESSION_FREE;
1902 break;
1903 case ISCSI_SESSION_LOGGED_IN:
1904 case ISCSI_SESSION_FREE:
1905 /* we raced with the unblock's flush */
1906 spin_unlock_irqrestore(&session->lock, flags);
1907 return;
1908 }
1909 spin_unlock_irqrestore(&session->lock, flags);
1910
1911 if (session->transport->session_recovery_timedout)
1912 session->transport->session_recovery_timedout(session);
1913
1914 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1915 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1916 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1917 }
1918
1919 static void __iscsi_unblock_session(struct work_struct *work)
1920 {
1921 struct iscsi_cls_session *session =
1922 container_of(work, struct iscsi_cls_session,
1923 unblock_work);
1924 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1925 struct iscsi_cls_host *ihost = shost->shost_data;
1926 unsigned long flags;
1927
1928 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1929 /*
1930 * The recovery and unblock work get run from the same workqueue,
1931 * so try to cancel it if it was going to run after this unblock.
1932 */
1933 cancel_delayed_work(&session->recovery_work);
1934 spin_lock_irqsave(&session->lock, flags);
1935 session->state = ISCSI_SESSION_LOGGED_IN;
1936 spin_unlock_irqrestore(&session->lock, flags);
1937 /* start IO */
1938 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1939 /*
1940 * Only do kernel scanning if the driver is properly hooked into
1941 * the async scanning code (drivers like iscsi_tcp do login and
1942 * scanning from userspace).
1943 */
1944 if (shost->hostt->scan_finished) {
1945 if (scsi_queue_work(shost, &session->scan_work))
1946 atomic_inc(&ihost->nr_scans);
1947 }
1948 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1949 }
1950
1951 /**
1952 * iscsi_unblock_session - set a session as logged in and start IO.
1953 * @session: iscsi session
1954 *
1955 * Mark a session as ready to accept IO.
1956 */
1957 void iscsi_unblock_session(struct iscsi_cls_session *session)
1958 {
1959 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1960 /*
1961 * make sure all the events have completed before tell the driver
1962 * it is safe
1963 */
1964 flush_workqueue(iscsi_eh_timer_workq);
1965 }
1966 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1967
1968 static void __iscsi_block_session(struct work_struct *work)
1969 {
1970 struct iscsi_cls_session *session =
1971 container_of(work, struct iscsi_cls_session,
1972 block_work);
1973 unsigned long flags;
1974
1975 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1976 spin_lock_irqsave(&session->lock, flags);
1977 session->state = ISCSI_SESSION_FAILED;
1978 spin_unlock_irqrestore(&session->lock, flags);
1979 scsi_target_block(&session->dev);
1980 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1981 if (session->recovery_tmo >= 0)
1982 queue_delayed_work(iscsi_eh_timer_workq,
1983 &session->recovery_work,
1984 session->recovery_tmo * HZ);
1985 }
1986
1987 void iscsi_block_session(struct iscsi_cls_session *session)
1988 {
1989 queue_work(iscsi_eh_timer_workq, &session->block_work);
1990 }
1991 EXPORT_SYMBOL_GPL(iscsi_block_session);
1992
1993 static void __iscsi_unbind_session(struct work_struct *work)
1994 {
1995 struct iscsi_cls_session *session =
1996 container_of(work, struct iscsi_cls_session,
1997 unbind_work);
1998 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1999 struct iscsi_cls_host *ihost = shost->shost_data;
2000 unsigned long flags;
2001 unsigned int target_id;
2002
2003 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2004
2005 /* Prevent new scans and make sure scanning is not in progress */
2006 mutex_lock(&ihost->mutex);
2007 spin_lock_irqsave(&session->lock, flags);
2008 if (session->target_id == ISCSI_MAX_TARGET) {
2009 spin_unlock_irqrestore(&session->lock, flags);
2010 mutex_unlock(&ihost->mutex);
2011 return;
2012 }
2013
2014 target_id = session->target_id;
2015 session->target_id = ISCSI_MAX_TARGET;
2016 spin_unlock_irqrestore(&session->lock, flags);
2017 mutex_unlock(&ihost->mutex);
2018
2019 if (session->ida_used)
2020 ida_simple_remove(&iscsi_sess_ida, target_id);
2021
2022 scsi_remove_target(&session->dev);
2023 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2024 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2025 }
2026
2027 struct iscsi_cls_session *
2028 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2029 int dd_size)
2030 {
2031 struct iscsi_cls_session *session;
2032
2033 session = kzalloc(sizeof(*session) + dd_size,
2034 GFP_KERNEL);
2035 if (!session)
2036 return NULL;
2037
2038 session->transport = transport;
2039 session->creator = -1;
2040 session->recovery_tmo = 120;
2041 session->recovery_tmo_sysfs_override = false;
2042 session->state = ISCSI_SESSION_FREE;
2043 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2044 INIT_LIST_HEAD(&session->sess_list);
2045 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2046 INIT_WORK(&session->block_work, __iscsi_block_session);
2047 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2048 INIT_WORK(&session->scan_work, iscsi_scan_session);
2049 spin_lock_init(&session->lock);
2050
2051 /* this is released in the dev's release function */
2052 scsi_host_get(shost);
2053 session->dev.parent = &shost->shost_gendev;
2054 session->dev.release = iscsi_session_release;
2055 device_initialize(&session->dev);
2056 if (dd_size)
2057 session->dd_data = &session[1];
2058
2059 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2060 return session;
2061 }
2062 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2063
2064 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2065 {
2066 unsigned long flags;
2067 int id = 0;
2068 int err;
2069
2070 session->sid = atomic_add_return(1, &iscsi_session_nr);
2071
2072 if (target_id == ISCSI_MAX_TARGET) {
2073 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2074
2075 if (id < 0) {
2076 iscsi_cls_session_printk(KERN_ERR, session,
2077 "Failure in Target ID Allocation\n");
2078 return id;
2079 }
2080 session->target_id = (unsigned int)id;
2081 session->ida_used = true;
2082 } else
2083 session->target_id = target_id;
2084
2085 dev_set_name(&session->dev, "session%u", session->sid);
2086 err = device_add(&session->dev);
2087 if (err) {
2088 iscsi_cls_session_printk(KERN_ERR, session,
2089 "could not register session's dev\n");
2090 goto release_ida;
2091 }
2092 transport_register_device(&session->dev);
2093
2094 spin_lock_irqsave(&sesslock, flags);
2095 list_add(&session->sess_list, &sesslist);
2096 spin_unlock_irqrestore(&sesslock, flags);
2097
2098 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2099 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2100 return 0;
2101
2102 release_ida:
2103 if (session->ida_used)
2104 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2105
2106 return err;
2107 }
2108 EXPORT_SYMBOL_GPL(iscsi_add_session);
2109
2110 /**
2111 * iscsi_create_session - create iscsi class session
2112 * @shost: scsi host
2113 * @transport: iscsi transport
2114 * @dd_size: private driver data size
2115 * @target_id: which target
2116 *
2117 * This can be called from a LLD or iscsi_transport.
2118 */
2119 struct iscsi_cls_session *
2120 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2121 int dd_size, unsigned int target_id)
2122 {
2123 struct iscsi_cls_session *session;
2124
2125 session = iscsi_alloc_session(shost, transport, dd_size);
2126 if (!session)
2127 return NULL;
2128
2129 if (iscsi_add_session(session, target_id)) {
2130 iscsi_free_session(session);
2131 return NULL;
2132 }
2133 return session;
2134 }
2135 EXPORT_SYMBOL_GPL(iscsi_create_session);
2136
2137 static void iscsi_conn_release(struct device *dev)
2138 {
2139 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2140 struct device *parent = conn->dev.parent;
2141
2142 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2143 kfree(conn);
2144 put_device(parent);
2145 }
2146
2147 static int iscsi_is_conn_dev(const struct device *dev)
2148 {
2149 return dev->release == iscsi_conn_release;
2150 }
2151
2152 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2153 {
2154 if (!iscsi_is_conn_dev(dev))
2155 return 0;
2156 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2157 }
2158
2159 void iscsi_remove_session(struct iscsi_cls_session *session)
2160 {
2161 unsigned long flags;
2162 int err;
2163
2164 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2165
2166 spin_lock_irqsave(&sesslock, flags);
2167 list_del(&session->sess_list);
2168 spin_unlock_irqrestore(&sesslock, flags);
2169
2170 /* make sure there are no blocks/unblocks queued */
2171 flush_workqueue(iscsi_eh_timer_workq);
2172 /* make sure the timedout callout is not running */
2173 if (!cancel_delayed_work(&session->recovery_work))
2174 flush_workqueue(iscsi_eh_timer_workq);
2175 /*
2176 * If we are blocked let commands flow again. The lld or iscsi
2177 * layer should set up the queuecommand to fail commands.
2178 * We assume that LLD will not be calling block/unblock while
2179 * removing the session.
2180 */
2181 spin_lock_irqsave(&session->lock, flags);
2182 session->state = ISCSI_SESSION_FREE;
2183 spin_unlock_irqrestore(&session->lock, flags);
2184
2185 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2186 /* flush running scans then delete devices */
2187 flush_work(&session->scan_work);
2188 __iscsi_unbind_session(&session->unbind_work);
2189
2190 /* hw iscsi may not have removed all connections from session */
2191 err = device_for_each_child(&session->dev, NULL,
2192 iscsi_iter_destroy_conn_fn);
2193 if (err)
2194 iscsi_cls_session_printk(KERN_ERR, session,
2195 "Could not delete all connections "
2196 "for session. Error %d.\n", err);
2197
2198 transport_unregister_device(&session->dev);
2199
2200 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2201 device_del(&session->dev);
2202 }
2203 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2204
2205 void iscsi_free_session(struct iscsi_cls_session *session)
2206 {
2207 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2208 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2209 put_device(&session->dev);
2210 }
2211 EXPORT_SYMBOL_GPL(iscsi_free_session);
2212
2213 /**
2214 * iscsi_destroy_session - destroy iscsi session
2215 * @session: iscsi_session
2216 *
2217 * Can be called by a LLD or iscsi_transport. There must not be
2218 * any running connections.
2219 */
2220 int iscsi_destroy_session(struct iscsi_cls_session *session)
2221 {
2222 iscsi_remove_session(session);
2223 ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
2224 iscsi_free_session(session);
2225 return 0;
2226 }
2227 EXPORT_SYMBOL_GPL(iscsi_destroy_session);
2228
2229 /**
2230 * iscsi_create_conn - create iscsi class connection
2231 * @session: iscsi cls session
2232 * @dd_size: private driver data size
2233 * @cid: connection id
2234 *
2235 * This can be called from a LLD or iscsi_transport. The connection
2236 * is child of the session so cid must be unique for all connections
2237 * on the session.
2238 *
2239 * Since we do not support MCS, cid will normally be zero. In some cases
2240 * for software iscsi we could be trying to preallocate a connection struct
2241 * in which case there could be two connection structs and cid would be
2242 * non-zero.
2243 */
2244 struct iscsi_cls_conn *
2245 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2246 {
2247 struct iscsi_transport *transport = session->transport;
2248 struct iscsi_cls_conn *conn;
2249 unsigned long flags;
2250 int err;
2251
2252 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2253 if (!conn)
2254 return NULL;
2255 if (dd_size)
2256 conn->dd_data = &conn[1];
2257
2258 mutex_init(&conn->ep_mutex);
2259 INIT_LIST_HEAD(&conn->conn_list);
2260 conn->transport = transport;
2261 conn->cid = cid;
2262
2263 /* this is released in the dev's release function */
2264 if (!get_device(&session->dev))
2265 goto free_conn;
2266
2267 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2268 conn->dev.parent = &session->dev;
2269 conn->dev.release = iscsi_conn_release;
2270 err = device_register(&conn->dev);
2271 if (err) {
2272 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2273 "register connection's dev\n");
2274 goto release_parent_ref;
2275 }
2276 transport_register_device(&conn->dev);
2277
2278 spin_lock_irqsave(&connlock, flags);
2279 list_add(&conn->conn_list, &connlist);
2280 spin_unlock_irqrestore(&connlock, flags);
2281
2282 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2283 return conn;
2284
2285 release_parent_ref:
2286 put_device(&session->dev);
2287 free_conn:
2288 kfree(conn);
2289 return NULL;
2290 }
2291
2292 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2293
2294 /**
2295 * iscsi_destroy_conn - destroy iscsi class connection
2296 * @conn: iscsi cls session
2297 *
2298 * This can be called from a LLD or iscsi_transport.
2299 */
2300 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2301 {
2302 unsigned long flags;
2303
2304 spin_lock_irqsave(&connlock, flags);
2305 list_del(&conn->conn_list);
2306 spin_unlock_irqrestore(&connlock, flags);
2307
2308 transport_unregister_device(&conn->dev);
2309 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2310 device_unregister(&conn->dev);
2311 return 0;
2312 }
2313 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2314
2315 /*
2316 * iscsi interface functions
2317 */
2318 static struct iscsi_internal *
2319 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2320 {
2321 struct iscsi_internal *priv;
2322 unsigned long flags;
2323
2324 spin_lock_irqsave(&iscsi_transport_lock, flags);
2325 list_for_each_entry(priv, &iscsi_transports, list) {
2326 if (tt == priv->iscsi_transport) {
2327 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2328 return priv;
2329 }
2330 }
2331 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2332 return NULL;
2333 }
2334
2335 static int
2336 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2337 {
2338 return nlmsg_multicast(nls, skb, 0, group, gfp);
2339 }
2340
2341 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2342 char *data, uint32_t data_size)
2343 {
2344 struct nlmsghdr *nlh;
2345 struct sk_buff *skb;
2346 struct iscsi_uevent *ev;
2347 char *pdu;
2348 struct iscsi_internal *priv;
2349 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2350 data_size);
2351
2352 priv = iscsi_if_transport_lookup(conn->transport);
2353 if (!priv)
2354 return -EINVAL;
2355
2356 skb = alloc_skb(len, GFP_ATOMIC);
2357 if (!skb) {
2358 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2359 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2360 "control PDU: OOM\n");
2361 return -ENOMEM;
2362 }
2363
2364 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2365 ev = nlmsg_data(nlh);
2366 memset(ev, 0, sizeof(*ev));
2367 ev->transport_handle = iscsi_handle(conn->transport);
2368 ev->type = ISCSI_KEVENT_RECV_PDU;
2369 ev->r.recv_req.cid = conn->cid;
2370 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2371 pdu = (char*)ev + sizeof(*ev);
2372 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2373 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2374
2375 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2376 }
2377 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2378
2379 int iscsi_offload_mesg(struct Scsi_Host *shost,
2380 struct iscsi_transport *transport, uint32_t type,
2381 char *data, uint16_t data_size)
2382 {
2383 struct nlmsghdr *nlh;
2384 struct sk_buff *skb;
2385 struct iscsi_uevent *ev;
2386 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2387
2388 skb = alloc_skb(len, GFP_ATOMIC);
2389 if (!skb) {
2390 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2391 return -ENOMEM;
2392 }
2393
2394 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2395 ev = nlmsg_data(nlh);
2396 memset(ev, 0, sizeof(*ev));
2397 ev->type = type;
2398 ev->transport_handle = iscsi_handle(transport);
2399 switch (type) {
2400 case ISCSI_KEVENT_PATH_REQ:
2401 ev->r.req_path.host_no = shost->host_no;
2402 break;
2403 case ISCSI_KEVENT_IF_DOWN:
2404 ev->r.notify_if_down.host_no = shost->host_no;
2405 break;
2406 }
2407
2408 memcpy((char *)ev + sizeof(*ev), data, data_size);
2409
2410 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2411 }
2412 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2413
2414 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2415 {
2416 struct nlmsghdr *nlh;
2417 struct sk_buff *skb;
2418 struct iscsi_uevent *ev;
2419 struct iscsi_internal *priv;
2420 int len = nlmsg_total_size(sizeof(*ev));
2421
2422 priv = iscsi_if_transport_lookup(conn->transport);
2423 if (!priv)
2424 return;
2425
2426 skb = alloc_skb(len, GFP_ATOMIC);
2427 if (!skb) {
2428 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2429 "conn error (%d)\n", error);
2430 return;
2431 }
2432
2433 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2434 ev = nlmsg_data(nlh);
2435 ev->transport_handle = iscsi_handle(conn->transport);
2436 ev->type = ISCSI_KEVENT_CONN_ERROR;
2437 ev->r.connerror.error = error;
2438 ev->r.connerror.cid = conn->cid;
2439 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2440
2441 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2442
2443 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2444 error);
2445 }
2446 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2447
2448 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2449 enum iscsi_conn_state state)
2450 {
2451 struct nlmsghdr *nlh;
2452 struct sk_buff *skb;
2453 struct iscsi_uevent *ev;
2454 struct iscsi_internal *priv;
2455 int len = nlmsg_total_size(sizeof(*ev));
2456
2457 priv = iscsi_if_transport_lookup(conn->transport);
2458 if (!priv)
2459 return;
2460
2461 skb = alloc_skb(len, GFP_ATOMIC);
2462 if (!skb) {
2463 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2464 "conn login (%d)\n", state);
2465 return;
2466 }
2467
2468 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2469 ev = nlmsg_data(nlh);
2470 ev->transport_handle = iscsi_handle(conn->transport);
2471 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2472 ev->r.conn_login.state = state;
2473 ev->r.conn_login.cid = conn->cid;
2474 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2475 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2476
2477 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2478 state);
2479 }
2480 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2481
2482 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2483 enum iscsi_host_event_code code, uint32_t data_size,
2484 uint8_t *data)
2485 {
2486 struct nlmsghdr *nlh;
2487 struct sk_buff *skb;
2488 struct iscsi_uevent *ev;
2489 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2490
2491 skb = alloc_skb(len, GFP_NOIO);
2492 if (!skb) {
2493 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2494 host_no, code);
2495 return;
2496 }
2497
2498 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2499 ev = nlmsg_data(nlh);
2500 ev->transport_handle = iscsi_handle(transport);
2501 ev->type = ISCSI_KEVENT_HOST_EVENT;
2502 ev->r.host_event.host_no = host_no;
2503 ev->r.host_event.code = code;
2504 ev->r.host_event.data_size = data_size;
2505
2506 if (data_size)
2507 memcpy((char *)ev + sizeof(*ev), data, data_size);
2508
2509 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2510 }
2511 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2512
2513 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2514 uint32_t status, uint32_t pid, uint32_t data_size,
2515 uint8_t *data)
2516 {
2517 struct nlmsghdr *nlh;
2518 struct sk_buff *skb;
2519 struct iscsi_uevent *ev;
2520 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2521
2522 skb = alloc_skb(len, GFP_NOIO);
2523 if (!skb) {
2524 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2525 return;
2526 }
2527
2528 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2529 ev = nlmsg_data(nlh);
2530 ev->transport_handle = iscsi_handle(transport);
2531 ev->type = ISCSI_KEVENT_PING_COMP;
2532 ev->r.ping_comp.host_no = host_no;
2533 ev->r.ping_comp.status = status;
2534 ev->r.ping_comp.pid = pid;
2535 ev->r.ping_comp.data_size = data_size;
2536 memcpy((char *)ev + sizeof(*ev), data, data_size);
2537
2538 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2539 }
2540 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2541
2542 static int
2543 iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
2544 void *payload, int size)
2545 {
2546 struct sk_buff *skb;
2547 struct nlmsghdr *nlh;
2548 int len = nlmsg_total_size(size);
2549 int flags = multi ? NLM_F_MULTI : 0;
2550 int t = done ? NLMSG_DONE : type;
2551
2552 skb = alloc_skb(len, GFP_ATOMIC);
2553 if (!skb) {
2554 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2555 return -ENOMEM;
2556 }
2557
2558 nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
2559 nlh->nlmsg_flags = flags;
2560 memcpy(nlmsg_data(nlh), payload, size);
2561 return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
2562 }
2563
2564 static int
2565 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2566 {
2567 struct iscsi_uevent *ev = nlmsg_data(nlh);
2568 struct iscsi_stats *stats;
2569 struct sk_buff *skbstat;
2570 struct iscsi_cls_conn *conn;
2571 struct nlmsghdr *nlhstat;
2572 struct iscsi_uevent *evstat;
2573 struct iscsi_internal *priv;
2574 int len = nlmsg_total_size(sizeof(*ev) +
2575 sizeof(struct iscsi_stats) +
2576 sizeof(struct iscsi_stats_custom) *
2577 ISCSI_STATS_CUSTOM_MAX);
2578 int err = 0;
2579
2580 priv = iscsi_if_transport_lookup(transport);
2581 if (!priv)
2582 return -EINVAL;
2583
2584 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2585 if (!conn)
2586 return -EEXIST;
2587
2588 do {
2589 int actual_size;
2590
2591 skbstat = alloc_skb(len, GFP_ATOMIC);
2592 if (!skbstat) {
2593 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2594 "deliver stats: OOM\n");
2595 return -ENOMEM;
2596 }
2597
2598 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2599 (len - sizeof(*nlhstat)), 0);
2600 evstat = nlmsg_data(nlhstat);
2601 memset(evstat, 0, sizeof(*evstat));
2602 evstat->transport_handle = iscsi_handle(conn->transport);
2603 evstat->type = nlh->nlmsg_type;
2604 evstat->u.get_stats.cid =
2605 ev->u.get_stats.cid;
2606 evstat->u.get_stats.sid =
2607 ev->u.get_stats.sid;
2608 stats = (struct iscsi_stats *)
2609 ((char*)evstat + sizeof(*evstat));
2610 memset(stats, 0, sizeof(*stats));
2611
2612 transport->get_stats(conn, stats);
2613 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2614 sizeof(struct iscsi_stats) +
2615 sizeof(struct iscsi_stats_custom) *
2616 stats->custom_length);
2617 actual_size -= sizeof(*nlhstat);
2618 actual_size = nlmsg_msg_size(actual_size);
2619 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2620 nlhstat->nlmsg_len = actual_size;
2621
2622 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2623 GFP_ATOMIC);
2624 } while (err < 0 && err != -ECONNREFUSED);
2625
2626 return err;
2627 }
2628
2629 /**
2630 * iscsi_session_event - send session destr. completion event
2631 * @session: iscsi class session
2632 * @event: type of event
2633 */
2634 int iscsi_session_event(struct iscsi_cls_session *session,
2635 enum iscsi_uevent_e event)
2636 {
2637 struct iscsi_internal *priv;
2638 struct Scsi_Host *shost;
2639 struct iscsi_uevent *ev;
2640 struct sk_buff *skb;
2641 struct nlmsghdr *nlh;
2642 int rc, len = nlmsg_total_size(sizeof(*ev));
2643
2644 priv = iscsi_if_transport_lookup(session->transport);
2645 if (!priv)
2646 return -EINVAL;
2647 shost = iscsi_session_to_shost(session);
2648
2649 skb = alloc_skb(len, GFP_KERNEL);
2650 if (!skb) {
2651 iscsi_cls_session_printk(KERN_ERR, session,
2652 "Cannot notify userspace of session "
2653 "event %u\n", event);
2654 return -ENOMEM;
2655 }
2656
2657 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2658 ev = nlmsg_data(nlh);
2659 ev->transport_handle = iscsi_handle(session->transport);
2660
2661 ev->type = event;
2662 switch (event) {
2663 case ISCSI_KEVENT_DESTROY_SESSION:
2664 ev->r.d_session.host_no = shost->host_no;
2665 ev->r.d_session.sid = session->sid;
2666 break;
2667 case ISCSI_KEVENT_CREATE_SESSION:
2668 ev->r.c_session_ret.host_no = shost->host_no;
2669 ev->r.c_session_ret.sid = session->sid;
2670 break;
2671 case ISCSI_KEVENT_UNBIND_SESSION:
2672 ev->r.unbind_session.host_no = shost->host_no;
2673 ev->r.unbind_session.sid = session->sid;
2674 break;
2675 default:
2676 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2677 "%u.\n", event);
2678 kfree_skb(skb);
2679 return -EINVAL;
2680 }
2681
2682 /*
2683 * this will occur if the daemon is not up, so we just warn
2684 * the user and when the daemon is restarted it will handle it
2685 */
2686 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2687 if (rc == -ESRCH)
2688 iscsi_cls_session_printk(KERN_ERR, session,
2689 "Cannot notify userspace of session "
2690 "event %u. Check iscsi daemon\n",
2691 event);
2692
2693 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2694 event, rc);
2695 return rc;
2696 }
2697 EXPORT_SYMBOL_GPL(iscsi_session_event);
2698
2699 static int
2700 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2701 struct iscsi_uevent *ev, pid_t pid,
2702 uint32_t initial_cmdsn, uint16_t cmds_max,
2703 uint16_t queue_depth)
2704 {
2705 struct iscsi_transport *transport = priv->iscsi_transport;
2706 struct iscsi_cls_session *session;
2707 struct Scsi_Host *shost;
2708
2709 session = transport->create_session(ep, cmds_max, queue_depth,
2710 initial_cmdsn);
2711 if (!session)
2712 return -ENOMEM;
2713
2714 session->creator = pid;
2715 shost = iscsi_session_to_shost(session);
2716 ev->r.c_session_ret.host_no = shost->host_no;
2717 ev->r.c_session_ret.sid = session->sid;
2718 ISCSI_DBG_TRANS_SESSION(session,
2719 "Completed creating transport session\n");
2720 return 0;
2721 }
2722
2723 static int
2724 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2725 {
2726 struct iscsi_cls_conn *conn;
2727 struct iscsi_cls_session *session;
2728
2729 session = iscsi_session_lookup(ev->u.c_conn.sid);
2730 if (!session) {
2731 printk(KERN_ERR "iscsi: invalid session %d.\n",
2732 ev->u.c_conn.sid);
2733 return -EINVAL;
2734 }
2735
2736 conn = transport->create_conn(session, ev->u.c_conn.cid);
2737 if (!conn) {
2738 iscsi_cls_session_printk(KERN_ERR, session,
2739 "couldn't create a new connection.");
2740 return -ENOMEM;
2741 }
2742
2743 ev->r.c_conn_ret.sid = session->sid;
2744 ev->r.c_conn_ret.cid = conn->cid;
2745
2746 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2747 return 0;
2748 }
2749
2750 static int
2751 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2752 {
2753 struct iscsi_cls_conn *conn;
2754
2755 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2756 if (!conn)
2757 return -EINVAL;
2758
2759 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2760 if (transport->destroy_conn)
2761 transport->destroy_conn(conn);
2762
2763 return 0;
2764 }
2765
2766 static int
2767 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2768 {
2769 char *data = (char*)ev + sizeof(*ev);
2770 struct iscsi_cls_conn *conn;
2771 struct iscsi_cls_session *session;
2772 int err = 0, value = 0;
2773
2774 session = iscsi_session_lookup(ev->u.set_param.sid);
2775 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2776 if (!conn || !session)
2777 return -EINVAL;
2778
2779 switch (ev->u.set_param.param) {
2780 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2781 sscanf(data, "%d", &value);
2782 if (!session->recovery_tmo_sysfs_override)
2783 session->recovery_tmo = value;
2784 break;
2785 default:
2786 err = transport->set_param(conn, ev->u.set_param.param,
2787 data, ev->u.set_param.len);
2788 }
2789
2790 return err;
2791 }
2792
2793 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2794 struct iscsi_uevent *ev, int msg_type)
2795 {
2796 struct iscsi_endpoint *ep;
2797 struct sockaddr *dst_addr;
2798 struct Scsi_Host *shost = NULL;
2799 int non_blocking, err = 0;
2800
2801 if (!transport->ep_connect)
2802 return -EINVAL;
2803
2804 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2805 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2806 if (!shost) {
2807 printk(KERN_ERR "ep connect failed. Could not find "
2808 "host no %u\n",
2809 ev->u.ep_connect_through_host.host_no);
2810 return -ENODEV;
2811 }
2812 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2813 } else
2814 non_blocking = ev->u.ep_connect.non_blocking;
2815
2816 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2817 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2818 if (IS_ERR(ep)) {
2819 err = PTR_ERR(ep);
2820 goto release_host;
2821 }
2822
2823 ev->r.ep_connect_ret.handle = ep->id;
2824 release_host:
2825 if (shost)
2826 scsi_host_put(shost);
2827 return err;
2828 }
2829
2830 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2831 u64 ep_handle)
2832 {
2833 struct iscsi_cls_conn *conn;
2834 struct iscsi_endpoint *ep;
2835
2836 if (!transport->ep_disconnect)
2837 return -EINVAL;
2838
2839 ep = iscsi_lookup_endpoint(ep_handle);
2840 if (!ep)
2841 return -EINVAL;
2842 conn = ep->conn;
2843 if (conn) {
2844 mutex_lock(&conn->ep_mutex);
2845 conn->ep = NULL;
2846 mutex_unlock(&conn->ep_mutex);
2847 }
2848
2849 transport->ep_disconnect(ep);
2850 return 0;
2851 }
2852
2853 static int
2854 iscsi_if_transport_ep(struct iscsi_transport *transport,
2855 struct iscsi_uevent *ev, int msg_type)
2856 {
2857 struct iscsi_endpoint *ep;
2858 int rc = 0;
2859
2860 switch (msg_type) {
2861 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2862 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2863 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2864 break;
2865 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2866 if (!transport->ep_poll)
2867 return -EINVAL;
2868
2869 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2870 if (!ep)
2871 return -EINVAL;
2872
2873 ev->r.retcode = transport->ep_poll(ep,
2874 ev->u.ep_poll.timeout_ms);
2875 break;
2876 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2877 rc = iscsi_if_ep_disconnect(transport,
2878 ev->u.ep_disconnect.ep_handle);
2879 break;
2880 }
2881 return rc;
2882 }
2883
2884 static int
2885 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2886 struct iscsi_uevent *ev)
2887 {
2888 struct Scsi_Host *shost;
2889 struct sockaddr *dst_addr;
2890 int err;
2891
2892 if (!transport->tgt_dscvr)
2893 return -EINVAL;
2894
2895 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2896 if (!shost) {
2897 printk(KERN_ERR "target discovery could not find host no %u\n",
2898 ev->u.tgt_dscvr.host_no);
2899 return -ENODEV;
2900 }
2901
2902
2903 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2904 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2905 ev->u.tgt_dscvr.enable, dst_addr);
2906 scsi_host_put(shost);
2907 return err;
2908 }
2909
2910 static int
2911 iscsi_set_host_param(struct iscsi_transport *transport,
2912 struct iscsi_uevent *ev)
2913 {
2914 char *data = (char*)ev + sizeof(*ev);
2915 struct Scsi_Host *shost;
2916 int err;
2917
2918 if (!transport->set_host_param)
2919 return -ENOSYS;
2920
2921 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2922 if (!shost) {
2923 printk(KERN_ERR "set_host_param could not find host no %u\n",
2924 ev->u.set_host_param.host_no);
2925 return -ENODEV;
2926 }
2927
2928 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2929 data, ev->u.set_host_param.len);
2930 scsi_host_put(shost);
2931 return err;
2932 }
2933
2934 static int
2935 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2936 {
2937 struct Scsi_Host *shost;
2938 struct iscsi_path *params;
2939 int err;
2940
2941 if (!transport->set_path)
2942 return -ENOSYS;
2943
2944 shost = scsi_host_lookup(ev->u.set_path.host_no);
2945 if (!shost) {
2946 printk(KERN_ERR "set path could not find host no %u\n",
2947 ev->u.set_path.host_no);
2948 return -ENODEV;
2949 }
2950
2951 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2952 err = transport->set_path(shost, params);
2953
2954 scsi_host_put(shost);
2955 return err;
2956 }
2957
2958 static int
2959 iscsi_set_iface_params(struct iscsi_transport *transport,
2960 struct iscsi_uevent *ev, uint32_t len)
2961 {
2962 char *data = (char *)ev + sizeof(*ev);
2963 struct Scsi_Host *shost;
2964 int err;
2965
2966 if (!transport->set_iface_param)
2967 return -ENOSYS;
2968
2969 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2970 if (!shost) {
2971 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2972 ev->u.set_iface_params.host_no);
2973 return -ENODEV;
2974 }
2975
2976 err = transport->set_iface_param(shost, data, len);
2977 scsi_host_put(shost);
2978 return err;
2979 }
2980
2981 static int
2982 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2983 {
2984 struct Scsi_Host *shost;
2985 struct sockaddr *dst_addr;
2986 int err;
2987
2988 if (!transport->send_ping)
2989 return -ENOSYS;
2990
2991 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
2992 if (!shost) {
2993 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
2994 ev->u.iscsi_ping.host_no);
2995 return -ENODEV;
2996 }
2997
2998 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
2999 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3000 ev->u.iscsi_ping.iface_type,
3001 ev->u.iscsi_ping.payload_size,
3002 ev->u.iscsi_ping.pid,
3003 dst_addr);
3004 scsi_host_put(shost);
3005 return err;
3006 }
3007
3008 static int
3009 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3010 {
3011 struct iscsi_uevent *ev = nlmsg_data(nlh);
3012 struct Scsi_Host *shost = NULL;
3013 struct iscsi_chap_rec *chap_rec;
3014 struct iscsi_internal *priv;
3015 struct sk_buff *skbchap;
3016 struct nlmsghdr *nlhchap;
3017 struct iscsi_uevent *evchap;
3018 uint32_t chap_buf_size;
3019 int len, err = 0;
3020 char *buf;
3021
3022 if (!transport->get_chap)
3023 return -EINVAL;
3024
3025 priv = iscsi_if_transport_lookup(transport);
3026 if (!priv)
3027 return -EINVAL;
3028
3029 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3030 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3031
3032 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3033 if (!shost) {
3034 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3035 __func__, ev->u.get_chap.host_no);
3036 return -ENODEV;
3037 }
3038
3039 do {
3040 int actual_size;
3041
3042 skbchap = alloc_skb(len, GFP_KERNEL);
3043 if (!skbchap) {
3044 printk(KERN_ERR "can not deliver chap: OOM\n");
3045 err = -ENOMEM;
3046 goto exit_get_chap;
3047 }
3048
3049 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3050 (len - sizeof(*nlhchap)), 0);
3051 evchap = nlmsg_data(nlhchap);
3052 memset(evchap, 0, sizeof(*evchap));
3053 evchap->transport_handle = iscsi_handle(transport);
3054 evchap->type = nlh->nlmsg_type;
3055 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3056 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3057 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3058 buf = (char *)evchap + sizeof(*evchap);
3059 memset(buf, 0, chap_buf_size);
3060
3061 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3062 &evchap->u.get_chap.num_entries, buf);
3063
3064 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3065 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3066 nlhchap->nlmsg_len = actual_size;
3067
3068 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3069 GFP_KERNEL);
3070 } while (err < 0 && err != -ECONNREFUSED);
3071
3072 exit_get_chap:
3073 scsi_host_put(shost);
3074 return err;
3075 }
3076
3077 static int iscsi_set_chap(struct iscsi_transport *transport,
3078 struct iscsi_uevent *ev, uint32_t len)
3079 {
3080 char *data = (char *)ev + sizeof(*ev);
3081 struct Scsi_Host *shost;
3082 int err = 0;
3083
3084 if (!transport->set_chap)
3085 return -ENOSYS;
3086
3087 shost = scsi_host_lookup(ev->u.set_path.host_no);
3088 if (!shost) {
3089 pr_err("%s could not find host no %u\n",
3090 __func__, ev->u.set_path.host_no);
3091 return -ENODEV;
3092 }
3093
3094 err = transport->set_chap(shost, data, len);
3095 scsi_host_put(shost);
3096 return err;
3097 }
3098
3099 static int iscsi_delete_chap(struct iscsi_transport *transport,
3100 struct iscsi_uevent *ev)
3101 {
3102 struct Scsi_Host *shost;
3103 int err = 0;
3104
3105 if (!transport->delete_chap)
3106 return -ENOSYS;
3107
3108 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3109 if (!shost) {
3110 printk(KERN_ERR "%s could not find host no %u\n",
3111 __func__, ev->u.delete_chap.host_no);
3112 return -ENODEV;
3113 }
3114
3115 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3116 scsi_host_put(shost);
3117 return err;
3118 }
3119
3120 static const struct {
3121 enum iscsi_discovery_parent_type value;
3122 char *name;
3123 } iscsi_discovery_parent_names[] = {
3124 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3125 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3126 {ISCSI_DISC_PARENT_ISNS, "isns" },
3127 };
3128
3129 char *iscsi_get_discovery_parent_name(int parent_type)
3130 {
3131 int i;
3132 char *state = "Unknown!";
3133
3134 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3135 if (iscsi_discovery_parent_names[i].value & parent_type) {
3136 state = iscsi_discovery_parent_names[i].name;
3137 break;
3138 }
3139 }
3140 return state;
3141 }
3142 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3143
3144 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3145 struct iscsi_uevent *ev, uint32_t len)
3146 {
3147 char *data = (char *)ev + sizeof(*ev);
3148 struct Scsi_Host *shost;
3149 struct iscsi_bus_flash_session *fnode_sess;
3150 struct iscsi_bus_flash_conn *fnode_conn;
3151 struct device *dev;
3152 uint32_t idx;
3153 int err = 0;
3154
3155 if (!transport->set_flashnode_param) {
3156 err = -ENOSYS;
3157 goto exit_set_fnode;
3158 }
3159
3160 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3161 if (!shost) {
3162 pr_err("%s could not find host no %u\n",
3163 __func__, ev->u.set_flashnode.host_no);
3164 err = -ENODEV;
3165 goto put_host;
3166 }
3167
3168 idx = ev->u.set_flashnode.flashnode_idx;
3169 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3170 if (!fnode_sess) {
3171 pr_err("%s could not find flashnode %u for host no %u\n",
3172 __func__, idx, ev->u.set_flashnode.host_no);
3173 err = -ENODEV;
3174 goto put_host;
3175 }
3176
3177 dev = iscsi_find_flashnode_conn(fnode_sess);
3178 if (!dev) {
3179 err = -ENODEV;
3180 goto put_sess;
3181 }
3182
3183 fnode_conn = iscsi_dev_to_flash_conn(dev);
3184 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3185 put_device(dev);
3186
3187 put_sess:
3188 put_device(&fnode_sess->dev);
3189
3190 put_host:
3191 scsi_host_put(shost);
3192
3193 exit_set_fnode:
3194 return err;
3195 }
3196
3197 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3198 struct iscsi_uevent *ev, uint32_t len)
3199 {
3200 char *data = (char *)ev + sizeof(*ev);
3201 struct Scsi_Host *shost;
3202 int index;
3203 int err = 0;
3204
3205 if (!transport->new_flashnode) {
3206 err = -ENOSYS;
3207 goto exit_new_fnode;
3208 }
3209
3210 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3211 if (!shost) {
3212 pr_err("%s could not find host no %u\n",
3213 __func__, ev->u.new_flashnode.host_no);
3214 err = -ENODEV;
3215 goto put_host;
3216 }
3217
3218 index = transport->new_flashnode(shost, data, len);
3219
3220 if (index >= 0)
3221 ev->r.new_flashnode_ret.flashnode_idx = index;
3222 else
3223 err = -EIO;
3224
3225 put_host:
3226 scsi_host_put(shost);
3227
3228 exit_new_fnode:
3229 return err;
3230 }
3231
3232 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3233 struct iscsi_uevent *ev)
3234 {
3235 struct Scsi_Host *shost;
3236 struct iscsi_bus_flash_session *fnode_sess;
3237 uint32_t idx;
3238 int err = 0;
3239
3240 if (!transport->del_flashnode) {
3241 err = -ENOSYS;
3242 goto exit_del_fnode;
3243 }
3244
3245 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3246 if (!shost) {
3247 pr_err("%s could not find host no %u\n",
3248 __func__, ev->u.del_flashnode.host_no);
3249 err = -ENODEV;
3250 goto put_host;
3251 }
3252
3253 idx = ev->u.del_flashnode.flashnode_idx;
3254 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3255 if (!fnode_sess) {
3256 pr_err("%s could not find flashnode %u for host no %u\n",
3257 __func__, idx, ev->u.del_flashnode.host_no);
3258 err = -ENODEV;
3259 goto put_host;
3260 }
3261
3262 err = transport->del_flashnode(fnode_sess);
3263 put_device(&fnode_sess->dev);
3264
3265 put_host:
3266 scsi_host_put(shost);
3267
3268 exit_del_fnode:
3269 return err;
3270 }
3271
3272 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3273 struct iscsi_uevent *ev)
3274 {
3275 struct Scsi_Host *shost;
3276 struct iscsi_bus_flash_session *fnode_sess;
3277 struct iscsi_bus_flash_conn *fnode_conn;
3278 struct device *dev;
3279 uint32_t idx;
3280 int err = 0;
3281
3282 if (!transport->login_flashnode) {
3283 err = -ENOSYS;
3284 goto exit_login_fnode;
3285 }
3286
3287 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3288 if (!shost) {
3289 pr_err("%s could not find host no %u\n",
3290 __func__, ev->u.login_flashnode.host_no);
3291 err = -ENODEV;
3292 goto put_host;
3293 }
3294
3295 idx = ev->u.login_flashnode.flashnode_idx;
3296 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3297 if (!fnode_sess) {
3298 pr_err("%s could not find flashnode %u for host no %u\n",
3299 __func__, idx, ev->u.login_flashnode.host_no);
3300 err = -ENODEV;
3301 goto put_host;
3302 }
3303
3304 dev = iscsi_find_flashnode_conn(fnode_sess);
3305 if (!dev) {
3306 err = -ENODEV;
3307 goto put_sess;
3308 }
3309
3310 fnode_conn = iscsi_dev_to_flash_conn(dev);
3311 err = transport->login_flashnode(fnode_sess, fnode_conn);
3312 put_device(dev);
3313
3314 put_sess:
3315 put_device(&fnode_sess->dev);
3316
3317 put_host:
3318 scsi_host_put(shost);
3319
3320 exit_login_fnode:
3321 return err;
3322 }
3323
3324 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3325 struct iscsi_uevent *ev)
3326 {
3327 struct Scsi_Host *shost;
3328 struct iscsi_bus_flash_session *fnode_sess;
3329 struct iscsi_bus_flash_conn *fnode_conn;
3330 struct device *dev;
3331 uint32_t idx;
3332 int err = 0;
3333
3334 if (!transport->logout_flashnode) {
3335 err = -ENOSYS;
3336 goto exit_logout_fnode;
3337 }
3338
3339 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3340 if (!shost) {
3341 pr_err("%s could not find host no %u\n",
3342 __func__, ev->u.logout_flashnode.host_no);
3343 err = -ENODEV;
3344 goto put_host;
3345 }
3346
3347 idx = ev->u.logout_flashnode.flashnode_idx;
3348 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3349 if (!fnode_sess) {
3350 pr_err("%s could not find flashnode %u for host no %u\n",
3351 __func__, idx, ev->u.logout_flashnode.host_no);
3352 err = -ENODEV;
3353 goto put_host;
3354 }
3355
3356 dev = iscsi_find_flashnode_conn(fnode_sess);
3357 if (!dev) {
3358 err = -ENODEV;
3359 goto put_sess;
3360 }
3361
3362 fnode_conn = iscsi_dev_to_flash_conn(dev);
3363
3364 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3365 put_device(dev);
3366
3367 put_sess:
3368 put_device(&fnode_sess->dev);
3369
3370 put_host:
3371 scsi_host_put(shost);
3372
3373 exit_logout_fnode:
3374 return err;
3375 }
3376
3377 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3378 struct iscsi_uevent *ev)
3379 {
3380 struct Scsi_Host *shost;
3381 struct iscsi_cls_session *session;
3382 int err = 0;
3383
3384 if (!transport->logout_flashnode_sid) {
3385 err = -ENOSYS;
3386 goto exit_logout_sid;
3387 }
3388
3389 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3390 if (!shost) {
3391 pr_err("%s could not find host no %u\n",
3392 __func__, ev->u.logout_flashnode.host_no);
3393 err = -ENODEV;
3394 goto put_host;
3395 }
3396
3397 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3398 if (!session) {
3399 pr_err("%s could not find session id %u\n",
3400 __func__, ev->u.logout_flashnode_sid.sid);
3401 err = -EINVAL;
3402 goto put_host;
3403 }
3404
3405 err = transport->logout_flashnode_sid(session);
3406
3407 put_host:
3408 scsi_host_put(shost);
3409
3410 exit_logout_sid:
3411 return err;
3412 }
3413
3414 static int
3415 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3416 {
3417 struct iscsi_uevent *ev = nlmsg_data(nlh);
3418 struct Scsi_Host *shost = NULL;
3419 struct iscsi_internal *priv;
3420 struct sk_buff *skbhost_stats;
3421 struct nlmsghdr *nlhhost_stats;
3422 struct iscsi_uevent *evhost_stats;
3423 int host_stats_size = 0;
3424 int len, err = 0;
3425 char *buf;
3426
3427 if (!transport->get_host_stats)
3428 return -ENOSYS;
3429
3430 priv = iscsi_if_transport_lookup(transport);
3431 if (!priv)
3432 return -EINVAL;
3433
3434 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3435 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3436
3437 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3438 if (!shost) {
3439 pr_err("%s: failed. Cound not find host no %u\n",
3440 __func__, ev->u.get_host_stats.host_no);
3441 return -ENODEV;
3442 }
3443
3444 do {
3445 int actual_size;
3446
3447 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3448 if (!skbhost_stats) {
3449 pr_err("cannot deliver host stats: OOM\n");
3450 err = -ENOMEM;
3451 goto exit_host_stats;
3452 }
3453
3454 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3455 (len - sizeof(*nlhhost_stats)), 0);
3456 evhost_stats = nlmsg_data(nlhhost_stats);
3457 memset(evhost_stats, 0, sizeof(*evhost_stats));
3458 evhost_stats->transport_handle = iscsi_handle(transport);
3459 evhost_stats->type = nlh->nlmsg_type;
3460 evhost_stats->u.get_host_stats.host_no =
3461 ev->u.get_host_stats.host_no;
3462 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3463 memset(buf, 0, host_stats_size);
3464
3465 err = transport->get_host_stats(shost, buf, host_stats_size);
3466 if (err) {
3467 kfree_skb(skbhost_stats);
3468 goto exit_host_stats;
3469 }
3470
3471 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3472 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3473 nlhhost_stats->nlmsg_len = actual_size;
3474
3475 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3476 GFP_KERNEL);
3477 } while (err < 0 && err != -ECONNREFUSED);
3478
3479 exit_host_stats:
3480 scsi_host_put(shost);
3481 return err;
3482 }
3483
3484
3485 static int
3486 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3487 {
3488 int err = 0;
3489 struct iscsi_uevent *ev = nlmsg_data(nlh);
3490 struct iscsi_transport *transport = NULL;
3491 struct iscsi_internal *priv;
3492 struct iscsi_cls_session *session;
3493 struct iscsi_cls_conn *conn;
3494 struct iscsi_endpoint *ep = NULL;
3495
3496 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3497 *group = ISCSI_NL_GRP_UIP;
3498 else
3499 *group = ISCSI_NL_GRP_ISCSID;
3500
3501 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3502 if (!priv)
3503 return -EINVAL;
3504 transport = priv->iscsi_transport;
3505
3506 if (!try_module_get(transport->owner))
3507 return -EINVAL;
3508
3509 switch (nlh->nlmsg_type) {
3510 case ISCSI_UEVENT_CREATE_SESSION:
3511 err = iscsi_if_create_session(priv, ep, ev,
3512 NETLINK_CB(skb).portid,
3513 ev->u.c_session.initial_cmdsn,
3514 ev->u.c_session.cmds_max,
3515 ev->u.c_session.queue_depth);
3516 break;
3517 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3518 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3519 if (!ep) {
3520 err = -EINVAL;
3521 break;
3522 }
3523
3524 err = iscsi_if_create_session(priv, ep, ev,
3525 NETLINK_CB(skb).portid,
3526 ev->u.c_bound_session.initial_cmdsn,
3527 ev->u.c_bound_session.cmds_max,
3528 ev->u.c_bound_session.queue_depth);
3529 break;
3530 case ISCSI_UEVENT_DESTROY_SESSION:
3531 session = iscsi_session_lookup(ev->u.d_session.sid);
3532 if (session)
3533 transport->destroy_session(session);
3534 else
3535 err = -EINVAL;
3536 break;
3537 case ISCSI_UEVENT_UNBIND_SESSION:
3538 session = iscsi_session_lookup(ev->u.d_session.sid);
3539 if (session)
3540 scsi_queue_work(iscsi_session_to_shost(session),
3541 &session->unbind_work);
3542 else
3543 err = -EINVAL;
3544 break;
3545 case ISCSI_UEVENT_CREATE_CONN:
3546 err = iscsi_if_create_conn(transport, ev);
3547 break;
3548 case ISCSI_UEVENT_DESTROY_CONN:
3549 err = iscsi_if_destroy_conn(transport, ev);
3550 break;
3551 case ISCSI_UEVENT_BIND_CONN:
3552 session = iscsi_session_lookup(ev->u.b_conn.sid);
3553 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3554
3555 if (conn && conn->ep)
3556 iscsi_if_ep_disconnect(transport, conn->ep->id);
3557
3558 if (!session || !conn) {
3559 err = -EINVAL;
3560 break;
3561 }
3562
3563 ev->r.retcode = transport->bind_conn(session, conn,
3564 ev->u.b_conn.transport_eph,
3565 ev->u.b_conn.is_leading);
3566 if (ev->r.retcode || !transport->ep_connect)
3567 break;
3568
3569 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3570 if (ep) {
3571 ep->conn = conn;
3572
3573 mutex_lock(&conn->ep_mutex);
3574 conn->ep = ep;
3575 mutex_unlock(&conn->ep_mutex);
3576 } else
3577 iscsi_cls_conn_printk(KERN_ERR, conn,
3578 "Could not set ep conn "
3579 "binding\n");
3580 break;
3581 case ISCSI_UEVENT_SET_PARAM:
3582 err = iscsi_set_param(transport, ev);
3583 break;
3584 case ISCSI_UEVENT_START_CONN:
3585 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3586 if (conn)
3587 ev->r.retcode = transport->start_conn(conn);
3588 else
3589 err = -EINVAL;
3590 break;
3591 case ISCSI_UEVENT_STOP_CONN:
3592 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3593 if (conn)
3594 transport->stop_conn(conn, ev->u.stop_conn.flag);
3595 else
3596 err = -EINVAL;
3597 break;
3598 case ISCSI_UEVENT_SEND_PDU:
3599 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3600 if (conn)
3601 ev->r.retcode = transport->send_pdu(conn,
3602 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3603 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3604 ev->u.send_pdu.data_size);
3605 else
3606 err = -EINVAL;
3607 break;
3608 case ISCSI_UEVENT_GET_STATS:
3609 err = iscsi_if_get_stats(transport, nlh);
3610 break;
3611 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3612 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3613 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3614 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3615 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3616 break;
3617 case ISCSI_UEVENT_TGT_DSCVR:
3618 err = iscsi_tgt_dscvr(transport, ev);
3619 break;
3620 case ISCSI_UEVENT_SET_HOST_PARAM:
3621 err = iscsi_set_host_param(transport, ev);
3622 break;
3623 case ISCSI_UEVENT_PATH_UPDATE:
3624 err = iscsi_set_path(transport, ev);
3625 break;
3626 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3627 err = iscsi_set_iface_params(transport, ev,
3628 nlmsg_attrlen(nlh, sizeof(*ev)));
3629 break;
3630 case ISCSI_UEVENT_PING:
3631 err = iscsi_send_ping(transport, ev);
3632 break;
3633 case ISCSI_UEVENT_GET_CHAP:
3634 err = iscsi_get_chap(transport, nlh);
3635 break;
3636 case ISCSI_UEVENT_DELETE_CHAP:
3637 err = iscsi_delete_chap(transport, ev);
3638 break;
3639 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3640 err = iscsi_set_flashnode_param(transport, ev,
3641 nlmsg_attrlen(nlh,
3642 sizeof(*ev)));
3643 break;
3644 case ISCSI_UEVENT_NEW_FLASHNODE:
3645 err = iscsi_new_flashnode(transport, ev,
3646 nlmsg_attrlen(nlh, sizeof(*ev)));
3647 break;
3648 case ISCSI_UEVENT_DEL_FLASHNODE:
3649 err = iscsi_del_flashnode(transport, ev);
3650 break;
3651 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3652 err = iscsi_login_flashnode(transport, ev);
3653 break;
3654 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3655 err = iscsi_logout_flashnode(transport, ev);
3656 break;
3657 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3658 err = iscsi_logout_flashnode_sid(transport, ev);
3659 break;
3660 case ISCSI_UEVENT_SET_CHAP:
3661 err = iscsi_set_chap(transport, ev,
3662 nlmsg_attrlen(nlh, sizeof(*ev)));
3663 break;
3664 case ISCSI_UEVENT_GET_HOST_STATS:
3665 err = iscsi_get_host_stats(transport, nlh);
3666 break;
3667 default:
3668 err = -ENOSYS;
3669 break;
3670 }
3671
3672 module_put(transport->owner);
3673 return err;
3674 }
3675
3676 /*
3677 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3678 * Malformed skbs with wrong lengths or invalid creds are not processed.
3679 */
3680 static void
3681 iscsi_if_rx(struct sk_buff *skb)
3682 {
3683 mutex_lock(&rx_queue_mutex);
3684 while (skb->len >= NLMSG_HDRLEN) {
3685 int err;
3686 uint32_t rlen;
3687 struct nlmsghdr *nlh;
3688 struct iscsi_uevent *ev;
3689 uint32_t group;
3690
3691 nlh = nlmsg_hdr(skb);
3692 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3693 skb->len < nlh->nlmsg_len) {
3694 break;
3695 }
3696
3697 ev = nlmsg_data(nlh);
3698 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3699 if (rlen > skb->len)
3700 rlen = skb->len;
3701
3702 err = iscsi_if_recv_msg(skb, nlh, &group);
3703 if (err) {
3704 ev->type = ISCSI_KEVENT_IF_ERROR;
3705 ev->iferror = err;
3706 }
3707 do {
3708 /*
3709 * special case for GET_STATS:
3710 * on success - sending reply and stats from
3711 * inside of if_recv_msg(),
3712 * on error - fall through.
3713 */
3714 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3715 break;
3716 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3717 break;
3718 err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
3719 nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
3720 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3721 skb_pull(skb, rlen);
3722 }
3723 mutex_unlock(&rx_queue_mutex);
3724 }
3725
3726 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3727 struct device_attribute dev_attr_##_prefix##_##_name = \
3728 __ATTR(_name,_mode,_show,_store)
3729
3730 /*
3731 * iSCSI connection attrs
3732 */
3733 #define iscsi_conn_attr_show(param) \
3734 static ssize_t \
3735 show_conn_param_##param(struct device *dev, \
3736 struct device_attribute *attr, char *buf) \
3737 { \
3738 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3739 struct iscsi_transport *t = conn->transport; \
3740 return t->get_conn_param(conn, param, buf); \
3741 }
3742
3743 #define iscsi_conn_attr(field, param) \
3744 iscsi_conn_attr_show(param) \
3745 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3746 NULL);
3747
3748 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3749 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3750 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3751 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3752 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3753 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3754 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3755 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3756 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3757 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3758 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3759 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3760 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3761 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3762 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3763 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3764 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3765 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3766 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3767 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3768 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3769 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3770 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3771 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3772 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3773 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3774 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3775 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3776
3777
3778 #define iscsi_conn_ep_attr_show(param) \
3779 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3780 struct device_attribute *attr,\
3781 char *buf) \
3782 { \
3783 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3784 struct iscsi_transport *t = conn->transport; \
3785 struct iscsi_endpoint *ep; \
3786 ssize_t rc; \
3787 \
3788 /* \
3789 * Need to make sure ep_disconnect does not free the LLD's \
3790 * interconnect resources while we are trying to read them. \
3791 */ \
3792 mutex_lock(&conn->ep_mutex); \
3793 ep = conn->ep; \
3794 if (!ep && t->ep_connect) { \
3795 mutex_unlock(&conn->ep_mutex); \
3796 return -ENOTCONN; \
3797 } \
3798 \
3799 if (ep) \
3800 rc = t->get_ep_param(ep, param, buf); \
3801 else \
3802 rc = t->get_conn_param(conn, param, buf); \
3803 mutex_unlock(&conn->ep_mutex); \
3804 return rc; \
3805 }
3806
3807 #define iscsi_conn_ep_attr(field, param) \
3808 iscsi_conn_ep_attr_show(param) \
3809 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3810 show_conn_ep_param_##param, NULL);
3811
3812 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3813 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3814
3815 static struct attribute *iscsi_conn_attrs[] = {
3816 &dev_attr_conn_max_recv_dlength.attr,
3817 &dev_attr_conn_max_xmit_dlength.attr,
3818 &dev_attr_conn_header_digest.attr,
3819 &dev_attr_conn_data_digest.attr,
3820 &dev_attr_conn_ifmarker.attr,
3821 &dev_attr_conn_ofmarker.attr,
3822 &dev_attr_conn_address.attr,
3823 &dev_attr_conn_port.attr,
3824 &dev_attr_conn_exp_statsn.attr,
3825 &dev_attr_conn_persistent_address.attr,
3826 &dev_attr_conn_persistent_port.attr,
3827 &dev_attr_conn_ping_tmo.attr,
3828 &dev_attr_conn_recv_tmo.attr,
3829 &dev_attr_conn_local_port.attr,
3830 &dev_attr_conn_statsn.attr,
3831 &dev_attr_conn_keepalive_tmo.attr,
3832 &dev_attr_conn_max_segment_size.attr,
3833 &dev_attr_conn_tcp_timestamp_stat.attr,
3834 &dev_attr_conn_tcp_wsf_disable.attr,
3835 &dev_attr_conn_tcp_nagle_disable.attr,
3836 &dev_attr_conn_tcp_timer_scale.attr,
3837 &dev_attr_conn_tcp_timestamp_enable.attr,
3838 &dev_attr_conn_fragment_disable.attr,
3839 &dev_attr_conn_ipv4_tos.attr,
3840 &dev_attr_conn_ipv6_traffic_class.attr,
3841 &dev_attr_conn_ipv6_flow_label.attr,
3842 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3843 &dev_attr_conn_tcp_xmit_wsf.attr,
3844 &dev_attr_conn_tcp_recv_wsf.attr,
3845 &dev_attr_conn_local_ipaddr.attr,
3846 NULL,
3847 };
3848
3849 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3850 struct attribute *attr, int i)
3851 {
3852 struct device *cdev = container_of(kobj, struct device, kobj);
3853 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3854 struct iscsi_transport *t = conn->transport;
3855 int param;
3856
3857 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3858 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3859 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3860 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3861 else if (attr == &dev_attr_conn_header_digest.attr)
3862 param = ISCSI_PARAM_HDRDGST_EN;
3863 else if (attr == &dev_attr_conn_data_digest.attr)
3864 param = ISCSI_PARAM_DATADGST_EN;
3865 else if (attr == &dev_attr_conn_ifmarker.attr)
3866 param = ISCSI_PARAM_IFMARKER_EN;
3867 else if (attr == &dev_attr_conn_ofmarker.attr)
3868 param = ISCSI_PARAM_OFMARKER_EN;
3869 else if (attr == &dev_attr_conn_address.attr)
3870 param = ISCSI_PARAM_CONN_ADDRESS;
3871 else if (attr == &dev_attr_conn_port.attr)
3872 param = ISCSI_PARAM_CONN_PORT;
3873 else if (attr == &dev_attr_conn_exp_statsn.attr)
3874 param = ISCSI_PARAM_EXP_STATSN;
3875 else if (attr == &dev_attr_conn_persistent_address.attr)
3876 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3877 else if (attr == &dev_attr_conn_persistent_port.attr)
3878 param = ISCSI_PARAM_PERSISTENT_PORT;
3879 else if (attr == &dev_attr_conn_ping_tmo.attr)
3880 param = ISCSI_PARAM_PING_TMO;
3881 else if (attr == &dev_attr_conn_recv_tmo.attr)
3882 param = ISCSI_PARAM_RECV_TMO;
3883 else if (attr == &dev_attr_conn_local_port.attr)
3884 param = ISCSI_PARAM_LOCAL_PORT;
3885 else if (attr == &dev_attr_conn_statsn.attr)
3886 param = ISCSI_PARAM_STATSN;
3887 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3888 param = ISCSI_PARAM_KEEPALIVE_TMO;
3889 else if (attr == &dev_attr_conn_max_segment_size.attr)
3890 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3891 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3892 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3893 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3894 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3895 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3896 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3897 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3898 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3899 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3900 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3901 else if (attr == &dev_attr_conn_fragment_disable.attr)
3902 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3903 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3904 param = ISCSI_PARAM_IPV4_TOS;
3905 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3906 param = ISCSI_PARAM_IPV6_TC;
3907 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3908 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3909 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3910 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3911 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3912 param = ISCSI_PARAM_TCP_XMIT_WSF;
3913 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3914 param = ISCSI_PARAM_TCP_RECV_WSF;
3915 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3916 param = ISCSI_PARAM_LOCAL_IPADDR;
3917 else {
3918 WARN_ONCE(1, "Invalid conn attr");
3919 return 0;
3920 }
3921
3922 return t->attr_is_visible(ISCSI_PARAM, param);
3923 }
3924
3925 static struct attribute_group iscsi_conn_group = {
3926 .attrs = iscsi_conn_attrs,
3927 .is_visible = iscsi_conn_attr_is_visible,
3928 };
3929
3930 /*
3931 * iSCSI session attrs
3932 */
3933 #define iscsi_session_attr_show(param, perm) \
3934 static ssize_t \
3935 show_session_param_##param(struct device *dev, \
3936 struct device_attribute *attr, char *buf) \
3937 { \
3938 struct iscsi_cls_session *session = \
3939 iscsi_dev_to_session(dev->parent); \
3940 struct iscsi_transport *t = session->transport; \
3941 \
3942 if (perm && !capable(CAP_SYS_ADMIN)) \
3943 return -EACCES; \
3944 return t->get_session_param(session, param, buf); \
3945 }
3946
3947 #define iscsi_session_attr(field, param, perm) \
3948 iscsi_session_attr_show(param, perm) \
3949 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3950 NULL);
3951 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3952 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3953 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3954 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3955 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3956 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3957 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3958 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3959 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3960 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3961 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3962 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3963 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3964 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
3965 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3966 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
3967 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3968 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3969 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3970 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
3971 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3972 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3973 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3974 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3975 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3976 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
3977 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3978 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3979 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3980 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3981 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3982 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3983 iscsi_session_attr(discovery_auth_optional,
3984 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3985 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3986 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3987 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3988 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3989 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3990 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3991 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
3992
3993 static ssize_t
3994 show_priv_session_state(struct device *dev, struct device_attribute *attr,
3995 char *buf)
3996 {
3997 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
3998 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
3999 }
4000 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4001 NULL);
4002 static ssize_t
4003 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4004 char *buf)
4005 {
4006 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4007 return sprintf(buf, "%d\n", session->creator);
4008 }
4009 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4010 NULL);
4011 static ssize_t
4012 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4013 char *buf)
4014 {
4015 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4016 return sprintf(buf, "%d\n", session->target_id);
4017 }
4018 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4019 show_priv_session_target_id, NULL);
4020
4021 #define iscsi_priv_session_attr_show(field, format) \
4022 static ssize_t \
4023 show_priv_session_##field(struct device *dev, \
4024 struct device_attribute *attr, char *buf) \
4025 { \
4026 struct iscsi_cls_session *session = \
4027 iscsi_dev_to_session(dev->parent); \
4028 if (session->field == -1) \
4029 return sprintf(buf, "off\n"); \
4030 return sprintf(buf, format"\n", session->field); \
4031 }
4032
4033 #define iscsi_priv_session_attr_store(field) \
4034 static ssize_t \
4035 store_priv_session_##field(struct device *dev, \
4036 struct device_attribute *attr, \
4037 const char *buf, size_t count) \
4038 { \
4039 int val; \
4040 char *cp; \
4041 struct iscsi_cls_session *session = \
4042 iscsi_dev_to_session(dev->parent); \
4043 if ((session->state == ISCSI_SESSION_FREE) || \
4044 (session->state == ISCSI_SESSION_FAILED)) \
4045 return -EBUSY; \
4046 if (strncmp(buf, "off", 3) == 0) { \
4047 session->field = -1; \
4048 session->field##_sysfs_override = true; \
4049 } else { \
4050 val = simple_strtoul(buf, &cp, 0); \
4051 if (*cp != '\0' && *cp != '\n') \
4052 return -EINVAL; \
4053 session->field = val; \
4054 session->field##_sysfs_override = true; \
4055 } \
4056 return count; \
4057 }
4058
4059 #define iscsi_priv_session_rw_attr(field, format) \
4060 iscsi_priv_session_attr_show(field, format) \
4061 iscsi_priv_session_attr_store(field) \
4062 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4063 show_priv_session_##field, \
4064 store_priv_session_##field)
4065
4066 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4067
4068 static struct attribute *iscsi_session_attrs[] = {
4069 &dev_attr_sess_initial_r2t.attr,
4070 &dev_attr_sess_max_outstanding_r2t.attr,
4071 &dev_attr_sess_immediate_data.attr,
4072 &dev_attr_sess_first_burst_len.attr,
4073 &dev_attr_sess_max_burst_len.attr,
4074 &dev_attr_sess_data_pdu_in_order.attr,
4075 &dev_attr_sess_data_seq_in_order.attr,
4076 &dev_attr_sess_erl.attr,
4077 &dev_attr_sess_targetname.attr,
4078 &dev_attr_sess_tpgt.attr,
4079 &dev_attr_sess_password.attr,
4080 &dev_attr_sess_password_in.attr,
4081 &dev_attr_sess_username.attr,
4082 &dev_attr_sess_username_in.attr,
4083 &dev_attr_sess_fast_abort.attr,
4084 &dev_attr_sess_abort_tmo.attr,
4085 &dev_attr_sess_lu_reset_tmo.attr,
4086 &dev_attr_sess_tgt_reset_tmo.attr,
4087 &dev_attr_sess_ifacename.attr,
4088 &dev_attr_sess_initiatorname.attr,
4089 &dev_attr_sess_targetalias.attr,
4090 &dev_attr_sess_boot_root.attr,
4091 &dev_attr_sess_boot_nic.attr,
4092 &dev_attr_sess_boot_target.attr,
4093 &dev_attr_priv_sess_recovery_tmo.attr,
4094 &dev_attr_priv_sess_state.attr,
4095 &dev_attr_priv_sess_creator.attr,
4096 &dev_attr_sess_chap_out_idx.attr,
4097 &dev_attr_sess_chap_in_idx.attr,
4098 &dev_attr_priv_sess_target_id.attr,
4099 &dev_attr_sess_auto_snd_tgt_disable.attr,
4100 &dev_attr_sess_discovery_session.attr,
4101 &dev_attr_sess_portal_type.attr,
4102 &dev_attr_sess_chap_auth.attr,
4103 &dev_attr_sess_discovery_logout.attr,
4104 &dev_attr_sess_bidi_chap.attr,
4105 &dev_attr_sess_discovery_auth_optional.attr,
4106 &dev_attr_sess_def_time2wait.attr,
4107 &dev_attr_sess_def_time2retain.attr,
4108 &dev_attr_sess_isid.attr,
4109 &dev_attr_sess_tsid.attr,
4110 &dev_attr_sess_def_taskmgmt_tmo.attr,
4111 &dev_attr_sess_discovery_parent_idx.attr,
4112 &dev_attr_sess_discovery_parent_type.attr,
4113 NULL,
4114 };
4115
4116 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4117 struct attribute *attr, int i)
4118 {
4119 struct device *cdev = container_of(kobj, struct device, kobj);
4120 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4121 struct iscsi_transport *t = session->transport;
4122 int param;
4123
4124 if (attr == &dev_attr_sess_initial_r2t.attr)
4125 param = ISCSI_PARAM_INITIAL_R2T_EN;
4126 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4127 param = ISCSI_PARAM_MAX_R2T;
4128 else if (attr == &dev_attr_sess_immediate_data.attr)
4129 param = ISCSI_PARAM_IMM_DATA_EN;
4130 else if (attr == &dev_attr_sess_first_burst_len.attr)
4131 param = ISCSI_PARAM_FIRST_BURST;
4132 else if (attr == &dev_attr_sess_max_burst_len.attr)
4133 param = ISCSI_PARAM_MAX_BURST;
4134 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4135 param = ISCSI_PARAM_PDU_INORDER_EN;
4136 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4137 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4138 else if (attr == &dev_attr_sess_erl.attr)
4139 param = ISCSI_PARAM_ERL;
4140 else if (attr == &dev_attr_sess_targetname.attr)
4141 param = ISCSI_PARAM_TARGET_NAME;
4142 else if (attr == &dev_attr_sess_tpgt.attr)
4143 param = ISCSI_PARAM_TPGT;
4144 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4145 param = ISCSI_PARAM_CHAP_IN_IDX;
4146 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4147 param = ISCSI_PARAM_CHAP_OUT_IDX;
4148 else if (attr == &dev_attr_sess_password.attr)
4149 param = ISCSI_PARAM_USERNAME;
4150 else if (attr == &dev_attr_sess_password_in.attr)
4151 param = ISCSI_PARAM_USERNAME_IN;
4152 else if (attr == &dev_attr_sess_username.attr)
4153 param = ISCSI_PARAM_PASSWORD;
4154 else if (attr == &dev_attr_sess_username_in.attr)
4155 param = ISCSI_PARAM_PASSWORD_IN;
4156 else if (attr == &dev_attr_sess_fast_abort.attr)
4157 param = ISCSI_PARAM_FAST_ABORT;
4158 else if (attr == &dev_attr_sess_abort_tmo.attr)
4159 param = ISCSI_PARAM_ABORT_TMO;
4160 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4161 param = ISCSI_PARAM_LU_RESET_TMO;
4162 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4163 param = ISCSI_PARAM_TGT_RESET_TMO;
4164 else if (attr == &dev_attr_sess_ifacename.attr)
4165 param = ISCSI_PARAM_IFACE_NAME;
4166 else if (attr == &dev_attr_sess_initiatorname.attr)
4167 param = ISCSI_PARAM_INITIATOR_NAME;
4168 else if (attr == &dev_attr_sess_targetalias.attr)
4169 param = ISCSI_PARAM_TARGET_ALIAS;
4170 else if (attr == &dev_attr_sess_boot_root.attr)
4171 param = ISCSI_PARAM_BOOT_ROOT;
4172 else if (attr == &dev_attr_sess_boot_nic.attr)
4173 param = ISCSI_PARAM_BOOT_NIC;
4174 else if (attr == &dev_attr_sess_boot_target.attr)
4175 param = ISCSI_PARAM_BOOT_TARGET;
4176 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4177 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4178 else if (attr == &dev_attr_sess_discovery_session.attr)
4179 param = ISCSI_PARAM_DISCOVERY_SESS;
4180 else if (attr == &dev_attr_sess_portal_type.attr)
4181 param = ISCSI_PARAM_PORTAL_TYPE;
4182 else if (attr == &dev_attr_sess_chap_auth.attr)
4183 param = ISCSI_PARAM_CHAP_AUTH_EN;
4184 else if (attr == &dev_attr_sess_discovery_logout.attr)
4185 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4186 else if (attr == &dev_attr_sess_bidi_chap.attr)
4187 param = ISCSI_PARAM_BIDI_CHAP_EN;
4188 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4189 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4190 else if (attr == &dev_attr_sess_def_time2wait.attr)
4191 param = ISCSI_PARAM_DEF_TIME2WAIT;
4192 else if (attr == &dev_attr_sess_def_time2retain.attr)
4193 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4194 else if (attr == &dev_attr_sess_isid.attr)
4195 param = ISCSI_PARAM_ISID;
4196 else if (attr == &dev_attr_sess_tsid.attr)
4197 param = ISCSI_PARAM_TSID;
4198 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4199 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4200 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4201 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4202 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4203 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4204 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4205 return S_IRUGO | S_IWUSR;
4206 else if (attr == &dev_attr_priv_sess_state.attr)
4207 return S_IRUGO;
4208 else if (attr == &dev_attr_priv_sess_creator.attr)
4209 return S_IRUGO;
4210 else if (attr == &dev_attr_priv_sess_target_id.attr)
4211 return S_IRUGO;
4212 else {
4213 WARN_ONCE(1, "Invalid session attr");
4214 return 0;
4215 }
4216
4217 return t->attr_is_visible(ISCSI_PARAM, param);
4218 }
4219
4220 static struct attribute_group iscsi_session_group = {
4221 .attrs = iscsi_session_attrs,
4222 .is_visible = iscsi_session_attr_is_visible,
4223 };
4224
4225 /*
4226 * iSCSI host attrs
4227 */
4228 #define iscsi_host_attr_show(param) \
4229 static ssize_t \
4230 show_host_param_##param(struct device *dev, \
4231 struct device_attribute *attr, char *buf) \
4232 { \
4233 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4234 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4235 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4236 }
4237
4238 #define iscsi_host_attr(field, param) \
4239 iscsi_host_attr_show(param) \
4240 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4241 NULL);
4242
4243 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4244 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4245 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4246 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4247 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4248 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4249
4250 static struct attribute *iscsi_host_attrs[] = {
4251 &dev_attr_host_netdev.attr,
4252 &dev_attr_host_hwaddress.attr,
4253 &dev_attr_host_ipaddress.attr,
4254 &dev_attr_host_initiatorname.attr,
4255 &dev_attr_host_port_state.attr,
4256 &dev_attr_host_port_speed.attr,
4257 NULL,
4258 };
4259
4260 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4261 struct attribute *attr, int i)
4262 {
4263 struct device *cdev = container_of(kobj, struct device, kobj);
4264 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4265 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4266 int param;
4267
4268 if (attr == &dev_attr_host_netdev.attr)
4269 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4270 else if (attr == &dev_attr_host_hwaddress.attr)
4271 param = ISCSI_HOST_PARAM_HWADDRESS;
4272 else if (attr == &dev_attr_host_ipaddress.attr)
4273 param = ISCSI_HOST_PARAM_IPADDRESS;
4274 else if (attr == &dev_attr_host_initiatorname.attr)
4275 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4276 else if (attr == &dev_attr_host_port_state.attr)
4277 param = ISCSI_HOST_PARAM_PORT_STATE;
4278 else if (attr == &dev_attr_host_port_speed.attr)
4279 param = ISCSI_HOST_PARAM_PORT_SPEED;
4280 else {
4281 WARN_ONCE(1, "Invalid host attr");
4282 return 0;
4283 }
4284
4285 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4286 }
4287
4288 static struct attribute_group iscsi_host_group = {
4289 .attrs = iscsi_host_attrs,
4290 .is_visible = iscsi_host_attr_is_visible,
4291 };
4292
4293 /* convert iscsi_port_speed values to ascii string name */
4294 static const struct {
4295 enum iscsi_port_speed value;
4296 char *name;
4297 } iscsi_port_speed_names[] = {
4298 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4299 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4300 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4301 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4302 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4303 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4304 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4305 };
4306
4307 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4308 {
4309 int i;
4310 char *speed = "Unknown!";
4311 struct iscsi_cls_host *ihost = shost->shost_data;
4312 uint32_t port_speed = ihost->port_speed;
4313
4314 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4315 if (iscsi_port_speed_names[i].value & port_speed) {
4316 speed = iscsi_port_speed_names[i].name;
4317 break;
4318 }
4319 }
4320 return speed;
4321 }
4322 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4323
4324 /* convert iscsi_port_state values to ascii string name */
4325 static const struct {
4326 enum iscsi_port_state value;
4327 char *name;
4328 } iscsi_port_state_names[] = {
4329 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4330 {ISCSI_PORT_STATE_UP, "LINK UP" },
4331 };
4332
4333 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4334 {
4335 int i;
4336 char *state = "Unknown!";
4337 struct iscsi_cls_host *ihost = shost->shost_data;
4338 uint32_t port_state = ihost->port_state;
4339
4340 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4341 if (iscsi_port_state_names[i].value & port_state) {
4342 state = iscsi_port_state_names[i].name;
4343 break;
4344 }
4345 }
4346 return state;
4347 }
4348 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4349
4350 static int iscsi_session_match(struct attribute_container *cont,
4351 struct device *dev)
4352 {
4353 struct iscsi_cls_session *session;
4354 struct Scsi_Host *shost;
4355 struct iscsi_internal *priv;
4356
4357 if (!iscsi_is_session_dev(dev))
4358 return 0;
4359
4360 session = iscsi_dev_to_session(dev);
4361 shost = iscsi_session_to_shost(session);
4362 if (!shost->transportt)
4363 return 0;
4364
4365 priv = to_iscsi_internal(shost->transportt);
4366 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4367 return 0;
4368
4369 return &priv->session_cont.ac == cont;
4370 }
4371
4372 static int iscsi_conn_match(struct attribute_container *cont,
4373 struct device *dev)
4374 {
4375 struct iscsi_cls_session *session;
4376 struct iscsi_cls_conn *conn;
4377 struct Scsi_Host *shost;
4378 struct iscsi_internal *priv;
4379
4380 if (!iscsi_is_conn_dev(dev))
4381 return 0;
4382
4383 conn = iscsi_dev_to_conn(dev);
4384 session = iscsi_dev_to_session(conn->dev.parent);
4385 shost = iscsi_session_to_shost(session);
4386
4387 if (!shost->transportt)
4388 return 0;
4389
4390 priv = to_iscsi_internal(shost->transportt);
4391 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4392 return 0;
4393
4394 return &priv->conn_cont.ac == cont;
4395 }
4396
4397 static int iscsi_host_match(struct attribute_container *cont,
4398 struct device *dev)
4399 {
4400 struct Scsi_Host *shost;
4401 struct iscsi_internal *priv;
4402
4403 if (!scsi_is_host_device(dev))
4404 return 0;
4405
4406 shost = dev_to_shost(dev);
4407 if (!shost->transportt ||
4408 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4409 return 0;
4410
4411 priv = to_iscsi_internal(shost->transportt);
4412 return &priv->t.host_attrs.ac == cont;
4413 }
4414
4415 struct scsi_transport_template *
4416 iscsi_register_transport(struct iscsi_transport *tt)
4417 {
4418 struct iscsi_internal *priv;
4419 unsigned long flags;
4420 int err;
4421
4422 BUG_ON(!tt);
4423
4424 priv = iscsi_if_transport_lookup(tt);
4425 if (priv)
4426 return NULL;
4427
4428 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4429 if (!priv)
4430 return NULL;
4431 INIT_LIST_HEAD(&priv->list);
4432 priv->iscsi_transport = tt;
4433 priv->t.user_scan = iscsi_user_scan;
4434 priv->t.create_work_queue = 1;
4435
4436 priv->dev.class = &iscsi_transport_class;
4437 dev_set_name(&priv->dev, "%s", tt->name);
4438 err = device_register(&priv->dev);
4439 if (err)
4440 goto free_priv;
4441
4442 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4443 if (err)
4444 goto unregister_dev;
4445
4446 /* host parameters */
4447 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4448 priv->t.host_attrs.ac.match = iscsi_host_match;
4449 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4450 priv->t.host_size = sizeof(struct iscsi_cls_host);
4451 transport_container_register(&priv->t.host_attrs);
4452
4453 /* connection parameters */
4454 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4455 priv->conn_cont.ac.match = iscsi_conn_match;
4456 priv->conn_cont.ac.grp = &iscsi_conn_group;
4457 transport_container_register(&priv->conn_cont);
4458
4459 /* session parameters */
4460 priv->session_cont.ac.class = &iscsi_session_class.class;
4461 priv->session_cont.ac.match = iscsi_session_match;
4462 priv->session_cont.ac.grp = &iscsi_session_group;
4463 transport_container_register(&priv->session_cont);
4464
4465 spin_lock_irqsave(&iscsi_transport_lock, flags);
4466 list_add(&priv->list, &iscsi_transports);
4467 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4468
4469 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4470 return &priv->t;
4471
4472 unregister_dev:
4473 device_unregister(&priv->dev);
4474 return NULL;
4475 free_priv:
4476 kfree(priv);
4477 return NULL;
4478 }
4479 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4480
4481 int iscsi_unregister_transport(struct iscsi_transport *tt)
4482 {
4483 struct iscsi_internal *priv;
4484 unsigned long flags;
4485
4486 BUG_ON(!tt);
4487
4488 mutex_lock(&rx_queue_mutex);
4489
4490 priv = iscsi_if_transport_lookup(tt);
4491 BUG_ON (!priv);
4492
4493 spin_lock_irqsave(&iscsi_transport_lock, flags);
4494 list_del(&priv->list);
4495 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4496
4497 transport_container_unregister(&priv->conn_cont);
4498 transport_container_unregister(&priv->session_cont);
4499 transport_container_unregister(&priv->t.host_attrs);
4500
4501 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4502 device_unregister(&priv->dev);
4503 mutex_unlock(&rx_queue_mutex);
4504
4505 return 0;
4506 }
4507 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4508
4509 static __init int iscsi_transport_init(void)
4510 {
4511 int err;
4512 struct netlink_kernel_cfg cfg = {
4513 .groups = 1,
4514 .input = iscsi_if_rx,
4515 };
4516 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4517 ISCSI_TRANSPORT_VERSION);
4518
4519 atomic_set(&iscsi_session_nr, 0);
4520
4521 err = class_register(&iscsi_transport_class);
4522 if (err)
4523 return err;
4524
4525 err = class_register(&iscsi_endpoint_class);
4526 if (err)
4527 goto unregister_transport_class;
4528
4529 err = class_register(&iscsi_iface_class);
4530 if (err)
4531 goto unregister_endpoint_class;
4532
4533 err = transport_class_register(&iscsi_host_class);
4534 if (err)
4535 goto unregister_iface_class;
4536
4537 err = transport_class_register(&iscsi_connection_class);
4538 if (err)
4539 goto unregister_host_class;
4540
4541 err = transport_class_register(&iscsi_session_class);
4542 if (err)
4543 goto unregister_conn_class;
4544
4545 err = bus_register(&iscsi_flashnode_bus);
4546 if (err)
4547 goto unregister_session_class;
4548
4549 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4550 if (!nls) {
4551 err = -ENOBUFS;
4552 goto unregister_flashnode_bus;
4553 }
4554
4555 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4556 if (!iscsi_eh_timer_workq) {
4557 err = -ENOMEM;
4558 goto release_nls;
4559 }
4560
4561 return 0;
4562
4563 release_nls:
4564 netlink_kernel_release(nls);
4565 unregister_flashnode_bus:
4566 bus_unregister(&iscsi_flashnode_bus);
4567 unregister_session_class:
4568 transport_class_unregister(&iscsi_session_class);
4569 unregister_conn_class:
4570 transport_class_unregister(&iscsi_connection_class);
4571 unregister_host_class:
4572 transport_class_unregister(&iscsi_host_class);
4573 unregister_iface_class:
4574 class_unregister(&iscsi_iface_class);
4575 unregister_endpoint_class:
4576 class_unregister(&iscsi_endpoint_class);
4577 unregister_transport_class:
4578 class_unregister(&iscsi_transport_class);
4579 return err;
4580 }
4581
4582 static void __exit iscsi_transport_exit(void)
4583 {
4584 destroy_workqueue(iscsi_eh_timer_workq);
4585 netlink_kernel_release(nls);
4586 bus_unregister(&iscsi_flashnode_bus);
4587 transport_class_unregister(&iscsi_connection_class);
4588 transport_class_unregister(&iscsi_session_class);
4589 transport_class_unregister(&iscsi_host_class);
4590 class_unregister(&iscsi_endpoint_class);
4591 class_unregister(&iscsi_iface_class);
4592 class_unregister(&iscsi_transport_class);
4593 }
4594
4595 module_init(iscsi_transport_init);
4596 module_exit(iscsi_transport_exit);
4597
4598 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4599 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4600 "Alex Aizman <itn780@yahoo.com>");
4601 MODULE_DESCRIPTION("iSCSI Transport Interface");
4602 MODULE_LICENSE("GPL");
4603 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4604 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
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