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Linux 4.9.137
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_iscsi.c
blobc39551b32e941e60713de3e88d45f9ea25917b73
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 int ret;
1541
1542 if (!i->iscsi_transport->bsg_request)
1543 return -ENOTSUPP;
1544
1545 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1546
1547 q = __scsi_alloc_queue(shost, bsg_request_fn);
1548 if (!q)
1549 return -ENOMEM;
1550
1551 ret = bsg_setup_queue(dev, q, bsg_name, iscsi_bsg_host_dispatch, 0);
1552 if (ret) {
1553 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1554 "initialize - no request queue\n");
1555 blk_cleanup_queue(q);
1556 return ret;
1557 }
1558
1559 ihost->bsg_q = q;
1560 return 0;
1561 }
1562
1563 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1564 struct device *cdev)
1565 {
1566 struct Scsi_Host *shost = dev_to_shost(dev);
1567 struct iscsi_cls_host *ihost = shost->shost_data;
1568
1569 memset(ihost, 0, sizeof(*ihost));
1570 atomic_set(&ihost->nr_scans, 0);
1571 mutex_init(&ihost->mutex);
1572
1573 iscsi_bsg_host_add(shost, ihost);
1574 /* ignore any bsg add error - we just can't do sgio */
1575
1576 return 0;
1577 }
1578
1579 static int iscsi_remove_host(struct transport_container *tc,
1580 struct device *dev, struct device *cdev)
1581 {
1582 struct Scsi_Host *shost = dev_to_shost(dev);
1583 struct iscsi_cls_host *ihost = shost->shost_data;
1584
1585 if (ihost->bsg_q) {
1586 bsg_unregister_queue(ihost->bsg_q);
1587 blk_cleanup_queue(ihost->bsg_q);
1588 }
1589 return 0;
1590 }
1591
1592 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1593 "iscsi_host",
1594 iscsi_setup_host,
1595 iscsi_remove_host,
1596 NULL);
1597
1598 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1599 "iscsi_session",
1600 NULL,
1601 NULL,
1602 NULL);
1603
1604 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1605 "iscsi_connection",
1606 NULL,
1607 NULL,
1608 NULL);
1609
1610 static struct sock *nls;
1611 static DEFINE_MUTEX(rx_queue_mutex);
1612
1613 static LIST_HEAD(sesslist);
1614 static DEFINE_SPINLOCK(sesslock);
1615 static LIST_HEAD(connlist);
1616 static DEFINE_SPINLOCK(connlock);
1617
1618 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1619 {
1620 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1621 return sess->sid;
1622 }
1623
1624 /*
1625 * Returns the matching session to a given sid
1626 */
1627 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1628 {
1629 unsigned long flags;
1630 struct iscsi_cls_session *sess;
1631
1632 spin_lock_irqsave(&sesslock, flags);
1633 list_for_each_entry(sess, &sesslist, sess_list) {
1634 if (sess->sid == sid) {
1635 spin_unlock_irqrestore(&sesslock, flags);
1636 return sess;
1637 }
1638 }
1639 spin_unlock_irqrestore(&sesslock, flags);
1640 return NULL;
1641 }
1642
1643 /*
1644 * Returns the matching connection to a given sid / cid tuple
1645 */
1646 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1647 {
1648 unsigned long flags;
1649 struct iscsi_cls_conn *conn;
1650
1651 spin_lock_irqsave(&connlock, flags);
1652 list_for_each_entry(conn, &connlist, conn_list) {
1653 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1654 spin_unlock_irqrestore(&connlock, flags);
1655 return conn;
1656 }
1657 }
1658 spin_unlock_irqrestore(&connlock, flags);
1659 return NULL;
1660 }
1661
1662 /*
1663 * The following functions can be used by LLDs that allocate
1664 * their own scsi_hosts or by software iscsi LLDs
1665 */
1666 static struct {
1667 int value;
1668 char *name;
1669 } iscsi_session_state_names[] = {
1670 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1671 { ISCSI_SESSION_FAILED, "FAILED" },
1672 { ISCSI_SESSION_FREE, "FREE" },
1673 };
1674
1675 static const char *iscsi_session_state_name(int state)
1676 {
1677 int i;
1678 char *name = NULL;
1679
1680 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1681 if (iscsi_session_state_names[i].value == state) {
1682 name = iscsi_session_state_names[i].name;
1683 break;
1684 }
1685 }
1686 return name;
1687 }
1688
1689 int iscsi_session_chkready(struct iscsi_cls_session *session)
1690 {
1691 unsigned long flags;
1692 int err;
1693
1694 spin_lock_irqsave(&session->lock, flags);
1695 switch (session->state) {
1696 case ISCSI_SESSION_LOGGED_IN:
1697 err = 0;
1698 break;
1699 case ISCSI_SESSION_FAILED:
1700 err = DID_IMM_RETRY << 16;
1701 break;
1702 case ISCSI_SESSION_FREE:
1703 err = DID_TRANSPORT_FAILFAST << 16;
1704 break;
1705 default:
1706 err = DID_NO_CONNECT << 16;
1707 break;
1708 }
1709 spin_unlock_irqrestore(&session->lock, flags);
1710 return err;
1711 }
1712 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1713
1714 int iscsi_is_session_online(struct iscsi_cls_session *session)
1715 {
1716 unsigned long flags;
1717 int ret = 0;
1718
1719 spin_lock_irqsave(&session->lock, flags);
1720 if (session->state == ISCSI_SESSION_LOGGED_IN)
1721 ret = 1;
1722 spin_unlock_irqrestore(&session->lock, flags);
1723 return ret;
1724 }
1725 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1726
1727 static void iscsi_session_release(struct device *dev)
1728 {
1729 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1730 struct Scsi_Host *shost;
1731
1732 shost = iscsi_session_to_shost(session);
1733 scsi_host_put(shost);
1734 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1735 kfree(session);
1736 }
1737
1738 int iscsi_is_session_dev(const struct device *dev)
1739 {
1740 return dev->release == iscsi_session_release;
1741 }
1742 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1743
1744 static int iscsi_iter_session_fn(struct device *dev, void *data)
1745 {
1746 void (* fn) (struct iscsi_cls_session *) = data;
1747
1748 if (!iscsi_is_session_dev(dev))
1749 return 0;
1750 fn(iscsi_dev_to_session(dev));
1751 return 0;
1752 }
1753
1754 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1755 void (*fn)(struct iscsi_cls_session *))
1756 {
1757 device_for_each_child(&shost->shost_gendev, fn,
1758 iscsi_iter_session_fn);
1759 }
1760 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1761
1762 /**
1763 * iscsi_scan_finished - helper to report when running scans are done
1764 * @shost: scsi host
1765 * @time: scan run time
1766 *
1767 * This function can be used by drives like qla4xxx to report to the scsi
1768 * layer when the scans it kicked off at module load time are done.
1769 */
1770 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1771 {
1772 struct iscsi_cls_host *ihost = shost->shost_data;
1773 /*
1774 * qla4xxx will have kicked off some session unblocks before calling
1775 * scsi_scan_host, so just wait for them to complete.
1776 */
1777 return !atomic_read(&ihost->nr_scans);
1778 }
1779 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1780
1781 struct iscsi_scan_data {
1782 unsigned int channel;
1783 unsigned int id;
1784 u64 lun;
1785 enum scsi_scan_mode rescan;
1786 };
1787
1788 static int iscsi_user_scan_session(struct device *dev, void *data)
1789 {
1790 struct iscsi_scan_data *scan_data = data;
1791 struct iscsi_cls_session *session;
1792 struct Scsi_Host *shost;
1793 struct iscsi_cls_host *ihost;
1794 unsigned long flags;
1795 unsigned int id;
1796
1797 if (!iscsi_is_session_dev(dev))
1798 return 0;
1799
1800 session = iscsi_dev_to_session(dev);
1801
1802 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1803
1804 shost = iscsi_session_to_shost(session);
1805 ihost = shost->shost_data;
1806
1807 mutex_lock(&ihost->mutex);
1808 spin_lock_irqsave(&session->lock, flags);
1809 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1810 spin_unlock_irqrestore(&session->lock, flags);
1811 goto user_scan_exit;
1812 }
1813 id = session->target_id;
1814 spin_unlock_irqrestore(&session->lock, flags);
1815
1816 if (id != ISCSI_MAX_TARGET) {
1817 if ((scan_data->channel == SCAN_WILD_CARD ||
1818 scan_data->channel == 0) &&
1819 (scan_data->id == SCAN_WILD_CARD ||
1820 scan_data->id == id))
1821 scsi_scan_target(&session->dev, 0, id,
1822 scan_data->lun, scan_data->rescan);
1823 }
1824
1825 user_scan_exit:
1826 mutex_unlock(&ihost->mutex);
1827 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1828 return 0;
1829 }
1830
1831 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1832 uint id, u64 lun)
1833 {
1834 struct iscsi_scan_data scan_data;
1835
1836 scan_data.channel = channel;
1837 scan_data.id = id;
1838 scan_data.lun = lun;
1839 scan_data.rescan = SCSI_SCAN_MANUAL;
1840
1841 return device_for_each_child(&shost->shost_gendev, &scan_data,
1842 iscsi_user_scan_session);
1843 }
1844
1845 static void iscsi_scan_session(struct work_struct *work)
1846 {
1847 struct iscsi_cls_session *session =
1848 container_of(work, struct iscsi_cls_session, scan_work);
1849 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1850 struct iscsi_cls_host *ihost = shost->shost_data;
1851 struct iscsi_scan_data scan_data;
1852
1853 scan_data.channel = 0;
1854 scan_data.id = SCAN_WILD_CARD;
1855 scan_data.lun = SCAN_WILD_CARD;
1856 scan_data.rescan = SCSI_SCAN_RESCAN;
1857
1858 iscsi_user_scan_session(&session->dev, &scan_data);
1859 atomic_dec(&ihost->nr_scans);
1860 }
1861
1862 /**
1863 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1864 * @cmd: scsi cmd passed to scsi eh handler
1865 *
1866 * If the session is down this function will wait for the recovery
1867 * timer to fire or for the session to be logged back in. If the
1868 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1869 * should pass this error value to the scsi eh.
1870 */
1871 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1872 {
1873 struct iscsi_cls_session *session =
1874 starget_to_session(scsi_target(cmd->device));
1875 unsigned long flags;
1876 int ret = 0;
1877
1878 spin_lock_irqsave(&session->lock, flags);
1879 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1880 if (session->state == ISCSI_SESSION_FREE) {
1881 ret = FAST_IO_FAIL;
1882 break;
1883 }
1884 spin_unlock_irqrestore(&session->lock, flags);
1885 msleep(1000);
1886 spin_lock_irqsave(&session->lock, flags);
1887 }
1888 spin_unlock_irqrestore(&session->lock, flags);
1889 return ret;
1890 }
1891 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1892
1893 static void session_recovery_timedout(struct work_struct *work)
1894 {
1895 struct iscsi_cls_session *session =
1896 container_of(work, struct iscsi_cls_session,
1897 recovery_work.work);
1898 unsigned long flags;
1899
1900 iscsi_cls_session_printk(KERN_INFO, session,
1901 "session recovery timed out after %d secs\n",
1902 session->recovery_tmo);
1903
1904 spin_lock_irqsave(&session->lock, flags);
1905 switch (session->state) {
1906 case ISCSI_SESSION_FAILED:
1907 session->state = ISCSI_SESSION_FREE;
1908 break;
1909 case ISCSI_SESSION_LOGGED_IN:
1910 case ISCSI_SESSION_FREE:
1911 /* we raced with the unblock's flush */
1912 spin_unlock_irqrestore(&session->lock, flags);
1913 return;
1914 }
1915 spin_unlock_irqrestore(&session->lock, flags);
1916
1917 if (session->transport->session_recovery_timedout)
1918 session->transport->session_recovery_timedout(session);
1919
1920 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1921 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1922 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1923 }
1924
1925 static void __iscsi_unblock_session(struct work_struct *work)
1926 {
1927 struct iscsi_cls_session *session =
1928 container_of(work, struct iscsi_cls_session,
1929 unblock_work);
1930 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1931 struct iscsi_cls_host *ihost = shost->shost_data;
1932 unsigned long flags;
1933
1934 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1935 /*
1936 * The recovery and unblock work get run from the same workqueue,
1937 * so try to cancel it if it was going to run after this unblock.
1938 */
1939 cancel_delayed_work(&session->recovery_work);
1940 spin_lock_irqsave(&session->lock, flags);
1941 session->state = ISCSI_SESSION_LOGGED_IN;
1942 spin_unlock_irqrestore(&session->lock, flags);
1943 /* start IO */
1944 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1945 /*
1946 * Only do kernel scanning if the driver is properly hooked into
1947 * the async scanning code (drivers like iscsi_tcp do login and
1948 * scanning from userspace).
1949 */
1950 if (shost->hostt->scan_finished) {
1951 if (scsi_queue_work(shost, &session->scan_work))
1952 atomic_inc(&ihost->nr_scans);
1953 }
1954 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1955 }
1956
1957 /**
1958 * iscsi_unblock_session - set a session as logged in and start IO.
1959 * @session: iscsi session
1960 *
1961 * Mark a session as ready to accept IO.
1962 */
1963 void iscsi_unblock_session(struct iscsi_cls_session *session)
1964 {
1965 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1966 /*
1967 * make sure all the events have completed before tell the driver
1968 * it is safe
1969 */
1970 flush_workqueue(iscsi_eh_timer_workq);
1971 }
1972 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1973
1974 static void __iscsi_block_session(struct work_struct *work)
1975 {
1976 struct iscsi_cls_session *session =
1977 container_of(work, struct iscsi_cls_session,
1978 block_work);
1979 unsigned long flags;
1980
1981 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1982 spin_lock_irqsave(&session->lock, flags);
1983 session->state = ISCSI_SESSION_FAILED;
1984 spin_unlock_irqrestore(&session->lock, flags);
1985 scsi_target_block(&session->dev);
1986 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1987 if (session->recovery_tmo >= 0)
1988 queue_delayed_work(iscsi_eh_timer_workq,
1989 &session->recovery_work,
1990 session->recovery_tmo * HZ);
1991 }
1992
1993 void iscsi_block_session(struct iscsi_cls_session *session)
1994 {
1995 queue_work(iscsi_eh_timer_workq, &session->block_work);
1996 }
1997 EXPORT_SYMBOL_GPL(iscsi_block_session);
1998
1999 static void __iscsi_unbind_session(struct work_struct *work)
2000 {
2001 struct iscsi_cls_session *session =
2002 container_of(work, struct iscsi_cls_session,
2003 unbind_work);
2004 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2005 struct iscsi_cls_host *ihost = shost->shost_data;
2006 unsigned long flags;
2007 unsigned int target_id;
2008
2009 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2010
2011 /* Prevent new scans and make sure scanning is not in progress */
2012 mutex_lock(&ihost->mutex);
2013 spin_lock_irqsave(&session->lock, flags);
2014 if (session->target_id == ISCSI_MAX_TARGET) {
2015 spin_unlock_irqrestore(&session->lock, flags);
2016 mutex_unlock(&ihost->mutex);
2017 return;
2018 }
2019
2020 target_id = session->target_id;
2021 session->target_id = ISCSI_MAX_TARGET;
2022 spin_unlock_irqrestore(&session->lock, flags);
2023 mutex_unlock(&ihost->mutex);
2024
2025 if (session->ida_used)
2026 ida_simple_remove(&iscsi_sess_ida, target_id);
2027
2028 scsi_remove_target(&session->dev);
2029 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2030 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2031 }
2032
2033 struct iscsi_cls_session *
2034 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2035 int dd_size)
2036 {
2037 struct iscsi_cls_session *session;
2038
2039 session = kzalloc(sizeof(*session) + dd_size,
2040 GFP_KERNEL);
2041 if (!session)
2042 return NULL;
2043
2044 session->transport = transport;
2045 session->creator = -1;
2046 session->recovery_tmo = 120;
2047 session->recovery_tmo_sysfs_override = false;
2048 session->state = ISCSI_SESSION_FREE;
2049 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2050 INIT_LIST_HEAD(&session->sess_list);
2051 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2052 INIT_WORK(&session->block_work, __iscsi_block_session);
2053 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2054 INIT_WORK(&session->scan_work, iscsi_scan_session);
2055 spin_lock_init(&session->lock);
2056
2057 /* this is released in the dev's release function */
2058 scsi_host_get(shost);
2059 session->dev.parent = &shost->shost_gendev;
2060 session->dev.release = iscsi_session_release;
2061 device_initialize(&session->dev);
2062 if (dd_size)
2063 session->dd_data = &session[1];
2064
2065 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2066 return session;
2067 }
2068 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2069
2070 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2071 {
2072 unsigned long flags;
2073 int id = 0;
2074 int err;
2075
2076 session->sid = atomic_add_return(1, &iscsi_session_nr);
2077
2078 if (target_id == ISCSI_MAX_TARGET) {
2079 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2080
2081 if (id < 0) {
2082 iscsi_cls_session_printk(KERN_ERR, session,
2083 "Failure in Target ID Allocation\n");
2084 return id;
2085 }
2086 session->target_id = (unsigned int)id;
2087 session->ida_used = true;
2088 } else
2089 session->target_id = target_id;
2090
2091 dev_set_name(&session->dev, "session%u", session->sid);
2092 err = device_add(&session->dev);
2093 if (err) {
2094 iscsi_cls_session_printk(KERN_ERR, session,
2095 "could not register session's dev\n");
2096 goto release_ida;
2097 }
2098 transport_register_device(&session->dev);
2099
2100 spin_lock_irqsave(&sesslock, flags);
2101 list_add(&session->sess_list, &sesslist);
2102 spin_unlock_irqrestore(&sesslock, flags);
2103
2104 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2105 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2106 return 0;
2107
2108 release_ida:
2109 if (session->ida_used)
2110 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2111
2112 return err;
2113 }
2114 EXPORT_SYMBOL_GPL(iscsi_add_session);
2115
2116 /**
2117 * iscsi_create_session - create iscsi class session
2118 * @shost: scsi host
2119 * @transport: iscsi transport
2120 * @dd_size: private driver data size
2121 * @target_id: which target
2122 *
2123 * This can be called from a LLD or iscsi_transport.
2124 */
2125 struct iscsi_cls_session *
2126 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2127 int dd_size, unsigned int target_id)
2128 {
2129 struct iscsi_cls_session *session;
2130
2131 session = iscsi_alloc_session(shost, transport, dd_size);
2132 if (!session)
2133 return NULL;
2134
2135 if (iscsi_add_session(session, target_id)) {
2136 iscsi_free_session(session);
2137 return NULL;
2138 }
2139 return session;
2140 }
2141 EXPORT_SYMBOL_GPL(iscsi_create_session);
2142
2143 static void iscsi_conn_release(struct device *dev)
2144 {
2145 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2146 struct device *parent = conn->dev.parent;
2147
2148 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2149 kfree(conn);
2150 put_device(parent);
2151 }
2152
2153 static int iscsi_is_conn_dev(const struct device *dev)
2154 {
2155 return dev->release == iscsi_conn_release;
2156 }
2157
2158 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2159 {
2160 if (!iscsi_is_conn_dev(dev))
2161 return 0;
2162 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2163 }
2164
2165 void iscsi_remove_session(struct iscsi_cls_session *session)
2166 {
2167 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2168 unsigned long flags;
2169 int err;
2170
2171 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2172
2173 spin_lock_irqsave(&sesslock, flags);
2174 list_del(&session->sess_list);
2175 spin_unlock_irqrestore(&sesslock, flags);
2176
2177 /* make sure there are no blocks/unblocks queued */
2178 flush_workqueue(iscsi_eh_timer_workq);
2179 /* make sure the timedout callout is not running */
2180 if (!cancel_delayed_work(&session->recovery_work))
2181 flush_workqueue(iscsi_eh_timer_workq);
2182 /*
2183 * If we are blocked let commands flow again. The lld or iscsi
2184 * layer should set up the queuecommand to fail commands.
2185 * We assume that LLD will not be calling block/unblock while
2186 * removing the session.
2187 */
2188 spin_lock_irqsave(&session->lock, flags);
2189 session->state = ISCSI_SESSION_FREE;
2190 spin_unlock_irqrestore(&session->lock, flags);
2191
2192 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2193 /* flush running scans then delete devices */
2194 scsi_flush_work(shost);
2195 __iscsi_unbind_session(&session->unbind_work);
2196
2197 /* hw iscsi may not have removed all connections from session */
2198 err = device_for_each_child(&session->dev, NULL,
2199 iscsi_iter_destroy_conn_fn);
2200 if (err)
2201 iscsi_cls_session_printk(KERN_ERR, session,
2202 "Could not delete all connections "
2203 "for session. Error %d.\n", err);
2204
2205 transport_unregister_device(&session->dev);
2206
2207 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2208 device_del(&session->dev);
2209 }
2210 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2211
2212 void iscsi_free_session(struct iscsi_cls_session *session)
2213 {
2214 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2215 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2216 put_device(&session->dev);
2217 }
2218 EXPORT_SYMBOL_GPL(iscsi_free_session);
2219
2220 /**
2221 * iscsi_destroy_session - destroy iscsi session
2222 * @session: iscsi_session
2223 *
2224 * Can be called by a LLD or iscsi_transport. There must not be
2225 * any running connections.
2226 */
2227 int iscsi_destroy_session(struct iscsi_cls_session *session)
2228 {
2229 iscsi_remove_session(session);
2230 ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
2231 iscsi_free_session(session);
2232 return 0;
2233 }
2234 EXPORT_SYMBOL_GPL(iscsi_destroy_session);
2235
2236 /**
2237 * iscsi_create_conn - create iscsi class connection
2238 * @session: iscsi cls session
2239 * @dd_size: private driver data size
2240 * @cid: connection id
2241 *
2242 * This can be called from a LLD or iscsi_transport. The connection
2243 * is child of the session so cid must be unique for all connections
2244 * on the session.
2245 *
2246 * Since we do not support MCS, cid will normally be zero. In some cases
2247 * for software iscsi we could be trying to preallocate a connection struct
2248 * in which case there could be two connection structs and cid would be
2249 * non-zero.
2250 */
2251 struct iscsi_cls_conn *
2252 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2253 {
2254 struct iscsi_transport *transport = session->transport;
2255 struct iscsi_cls_conn *conn;
2256 unsigned long flags;
2257 int err;
2258
2259 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2260 if (!conn)
2261 return NULL;
2262 if (dd_size)
2263 conn->dd_data = &conn[1];
2264
2265 mutex_init(&conn->ep_mutex);
2266 INIT_LIST_HEAD(&conn->conn_list);
2267 conn->transport = transport;
2268 conn->cid = cid;
2269
2270 /* this is released in the dev's release function */
2271 if (!get_device(&session->dev))
2272 goto free_conn;
2273
2274 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2275 conn->dev.parent = &session->dev;
2276 conn->dev.release = iscsi_conn_release;
2277 err = device_register(&conn->dev);
2278 if (err) {
2279 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2280 "register connection's dev\n");
2281 goto release_parent_ref;
2282 }
2283 transport_register_device(&conn->dev);
2284
2285 spin_lock_irqsave(&connlock, flags);
2286 list_add(&conn->conn_list, &connlist);
2287 spin_unlock_irqrestore(&connlock, flags);
2288
2289 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2290 return conn;
2291
2292 release_parent_ref:
2293 put_device(&session->dev);
2294 free_conn:
2295 kfree(conn);
2296 return NULL;
2297 }
2298
2299 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2300
2301 /**
2302 * iscsi_destroy_conn - destroy iscsi class connection
2303 * @conn: iscsi cls session
2304 *
2305 * This can be called from a LLD or iscsi_transport.
2306 */
2307 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2308 {
2309 unsigned long flags;
2310
2311 spin_lock_irqsave(&connlock, flags);
2312 list_del(&conn->conn_list);
2313 spin_unlock_irqrestore(&connlock, flags);
2314
2315 transport_unregister_device(&conn->dev);
2316 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2317 device_unregister(&conn->dev);
2318 return 0;
2319 }
2320 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2321
2322 /*
2323 * iscsi interface functions
2324 */
2325 static struct iscsi_internal *
2326 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2327 {
2328 struct iscsi_internal *priv;
2329 unsigned long flags;
2330
2331 spin_lock_irqsave(&iscsi_transport_lock, flags);
2332 list_for_each_entry(priv, &iscsi_transports, list) {
2333 if (tt == priv->iscsi_transport) {
2334 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2335 return priv;
2336 }
2337 }
2338 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2339 return NULL;
2340 }
2341
2342 static int
2343 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2344 {
2345 return nlmsg_multicast(nls, skb, 0, group, gfp);
2346 }
2347
2348 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2349 char *data, uint32_t data_size)
2350 {
2351 struct nlmsghdr *nlh;
2352 struct sk_buff *skb;
2353 struct iscsi_uevent *ev;
2354 char *pdu;
2355 struct iscsi_internal *priv;
2356 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2357 data_size);
2358
2359 priv = iscsi_if_transport_lookup(conn->transport);
2360 if (!priv)
2361 return -EINVAL;
2362
2363 skb = alloc_skb(len, GFP_ATOMIC);
2364 if (!skb) {
2365 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2366 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2367 "control PDU: OOM\n");
2368 return -ENOMEM;
2369 }
2370
2371 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2372 ev = nlmsg_data(nlh);
2373 memset(ev, 0, sizeof(*ev));
2374 ev->transport_handle = iscsi_handle(conn->transport);
2375 ev->type = ISCSI_KEVENT_RECV_PDU;
2376 ev->r.recv_req.cid = conn->cid;
2377 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2378 pdu = (char*)ev + sizeof(*ev);
2379 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2380 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2381
2382 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2383 }
2384 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2385
2386 int iscsi_offload_mesg(struct Scsi_Host *shost,
2387 struct iscsi_transport *transport, uint32_t type,
2388 char *data, uint16_t data_size)
2389 {
2390 struct nlmsghdr *nlh;
2391 struct sk_buff *skb;
2392 struct iscsi_uevent *ev;
2393 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2394
2395 skb = alloc_skb(len, GFP_ATOMIC);
2396 if (!skb) {
2397 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2398 return -ENOMEM;
2399 }
2400
2401 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2402 ev = nlmsg_data(nlh);
2403 memset(ev, 0, sizeof(*ev));
2404 ev->type = type;
2405 ev->transport_handle = iscsi_handle(transport);
2406 switch (type) {
2407 case ISCSI_KEVENT_PATH_REQ:
2408 ev->r.req_path.host_no = shost->host_no;
2409 break;
2410 case ISCSI_KEVENT_IF_DOWN:
2411 ev->r.notify_if_down.host_no = shost->host_no;
2412 break;
2413 }
2414
2415 memcpy((char *)ev + sizeof(*ev), data, data_size);
2416
2417 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2418 }
2419 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2420
2421 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2422 {
2423 struct nlmsghdr *nlh;
2424 struct sk_buff *skb;
2425 struct iscsi_uevent *ev;
2426 struct iscsi_internal *priv;
2427 int len = nlmsg_total_size(sizeof(*ev));
2428
2429 priv = iscsi_if_transport_lookup(conn->transport);
2430 if (!priv)
2431 return;
2432
2433 skb = alloc_skb(len, GFP_ATOMIC);
2434 if (!skb) {
2435 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2436 "conn error (%d)\n", error);
2437 return;
2438 }
2439
2440 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2441 ev = nlmsg_data(nlh);
2442 ev->transport_handle = iscsi_handle(conn->transport);
2443 ev->type = ISCSI_KEVENT_CONN_ERROR;
2444 ev->r.connerror.error = error;
2445 ev->r.connerror.cid = conn->cid;
2446 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2447
2448 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2449
2450 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2451 error);
2452 }
2453 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2454
2455 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2456 enum iscsi_conn_state state)
2457 {
2458 struct nlmsghdr *nlh;
2459 struct sk_buff *skb;
2460 struct iscsi_uevent *ev;
2461 struct iscsi_internal *priv;
2462 int len = nlmsg_total_size(sizeof(*ev));
2463
2464 priv = iscsi_if_transport_lookup(conn->transport);
2465 if (!priv)
2466 return;
2467
2468 skb = alloc_skb(len, GFP_ATOMIC);
2469 if (!skb) {
2470 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2471 "conn login (%d)\n", state);
2472 return;
2473 }
2474
2475 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2476 ev = nlmsg_data(nlh);
2477 ev->transport_handle = iscsi_handle(conn->transport);
2478 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2479 ev->r.conn_login.state = state;
2480 ev->r.conn_login.cid = conn->cid;
2481 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2482 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2483
2484 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2485 state);
2486 }
2487 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2488
2489 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2490 enum iscsi_host_event_code code, uint32_t data_size,
2491 uint8_t *data)
2492 {
2493 struct nlmsghdr *nlh;
2494 struct sk_buff *skb;
2495 struct iscsi_uevent *ev;
2496 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2497
2498 skb = alloc_skb(len, GFP_NOIO);
2499 if (!skb) {
2500 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2501 host_no, code);
2502 return;
2503 }
2504
2505 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2506 ev = nlmsg_data(nlh);
2507 ev->transport_handle = iscsi_handle(transport);
2508 ev->type = ISCSI_KEVENT_HOST_EVENT;
2509 ev->r.host_event.host_no = host_no;
2510 ev->r.host_event.code = code;
2511 ev->r.host_event.data_size = data_size;
2512
2513 if (data_size)
2514 memcpy((char *)ev + sizeof(*ev), data, data_size);
2515
2516 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2517 }
2518 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2519
2520 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2521 uint32_t status, uint32_t pid, uint32_t data_size,
2522 uint8_t *data)
2523 {
2524 struct nlmsghdr *nlh;
2525 struct sk_buff *skb;
2526 struct iscsi_uevent *ev;
2527 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2528
2529 skb = alloc_skb(len, GFP_NOIO);
2530 if (!skb) {
2531 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2532 return;
2533 }
2534
2535 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2536 ev = nlmsg_data(nlh);
2537 ev->transport_handle = iscsi_handle(transport);
2538 ev->type = ISCSI_KEVENT_PING_COMP;
2539 ev->r.ping_comp.host_no = host_no;
2540 ev->r.ping_comp.status = status;
2541 ev->r.ping_comp.pid = pid;
2542 ev->r.ping_comp.data_size = data_size;
2543 memcpy((char *)ev + sizeof(*ev), data, data_size);
2544
2545 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2546 }
2547 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2548
2549 static int
2550 iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
2551 void *payload, int size)
2552 {
2553 struct sk_buff *skb;
2554 struct nlmsghdr *nlh;
2555 int len = nlmsg_total_size(size);
2556 int flags = multi ? NLM_F_MULTI : 0;
2557 int t = done ? NLMSG_DONE : type;
2558
2559 skb = alloc_skb(len, GFP_ATOMIC);
2560 if (!skb) {
2561 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2562 return -ENOMEM;
2563 }
2564
2565 nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
2566 nlh->nlmsg_flags = flags;
2567 memcpy(nlmsg_data(nlh), payload, size);
2568 return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
2569 }
2570
2571 static int
2572 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2573 {
2574 struct iscsi_uevent *ev = nlmsg_data(nlh);
2575 struct iscsi_stats *stats;
2576 struct sk_buff *skbstat;
2577 struct iscsi_cls_conn *conn;
2578 struct nlmsghdr *nlhstat;
2579 struct iscsi_uevent *evstat;
2580 struct iscsi_internal *priv;
2581 int len = nlmsg_total_size(sizeof(*ev) +
2582 sizeof(struct iscsi_stats) +
2583 sizeof(struct iscsi_stats_custom) *
2584 ISCSI_STATS_CUSTOM_MAX);
2585 int err = 0;
2586
2587 priv = iscsi_if_transport_lookup(transport);
2588 if (!priv)
2589 return -EINVAL;
2590
2591 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2592 if (!conn)
2593 return -EEXIST;
2594
2595 do {
2596 int actual_size;
2597
2598 skbstat = alloc_skb(len, GFP_ATOMIC);
2599 if (!skbstat) {
2600 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2601 "deliver stats: OOM\n");
2602 return -ENOMEM;
2603 }
2604
2605 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2606 (len - sizeof(*nlhstat)), 0);
2607 evstat = nlmsg_data(nlhstat);
2608 memset(evstat, 0, sizeof(*evstat));
2609 evstat->transport_handle = iscsi_handle(conn->transport);
2610 evstat->type = nlh->nlmsg_type;
2611 evstat->u.get_stats.cid =
2612 ev->u.get_stats.cid;
2613 evstat->u.get_stats.sid =
2614 ev->u.get_stats.sid;
2615 stats = (struct iscsi_stats *)
2616 ((char*)evstat + sizeof(*evstat));
2617 memset(stats, 0, sizeof(*stats));
2618
2619 transport->get_stats(conn, stats);
2620 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2621 sizeof(struct iscsi_stats) +
2622 sizeof(struct iscsi_stats_custom) *
2623 stats->custom_length);
2624 actual_size -= sizeof(*nlhstat);
2625 actual_size = nlmsg_msg_size(actual_size);
2626 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2627 nlhstat->nlmsg_len = actual_size;
2628
2629 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2630 GFP_ATOMIC);
2631 } while (err < 0 && err != -ECONNREFUSED);
2632
2633 return err;
2634 }
2635
2636 /**
2637 * iscsi_session_event - send session destr. completion event
2638 * @session: iscsi class session
2639 * @event: type of event
2640 */
2641 int iscsi_session_event(struct iscsi_cls_session *session,
2642 enum iscsi_uevent_e event)
2643 {
2644 struct iscsi_internal *priv;
2645 struct Scsi_Host *shost;
2646 struct iscsi_uevent *ev;
2647 struct sk_buff *skb;
2648 struct nlmsghdr *nlh;
2649 int rc, len = nlmsg_total_size(sizeof(*ev));
2650
2651 priv = iscsi_if_transport_lookup(session->transport);
2652 if (!priv)
2653 return -EINVAL;
2654 shost = iscsi_session_to_shost(session);
2655
2656 skb = alloc_skb(len, GFP_KERNEL);
2657 if (!skb) {
2658 iscsi_cls_session_printk(KERN_ERR, session,
2659 "Cannot notify userspace of session "
2660 "event %u\n", event);
2661 return -ENOMEM;
2662 }
2663
2664 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2665 ev = nlmsg_data(nlh);
2666 ev->transport_handle = iscsi_handle(session->transport);
2667
2668 ev->type = event;
2669 switch (event) {
2670 case ISCSI_KEVENT_DESTROY_SESSION:
2671 ev->r.d_session.host_no = shost->host_no;
2672 ev->r.d_session.sid = session->sid;
2673 break;
2674 case ISCSI_KEVENT_CREATE_SESSION:
2675 ev->r.c_session_ret.host_no = shost->host_no;
2676 ev->r.c_session_ret.sid = session->sid;
2677 break;
2678 case ISCSI_KEVENT_UNBIND_SESSION:
2679 ev->r.unbind_session.host_no = shost->host_no;
2680 ev->r.unbind_session.sid = session->sid;
2681 break;
2682 default:
2683 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2684 "%u.\n", event);
2685 kfree_skb(skb);
2686 return -EINVAL;
2687 }
2688
2689 /*
2690 * this will occur if the daemon is not up, so we just warn
2691 * the user and when the daemon is restarted it will handle it
2692 */
2693 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2694 if (rc == -ESRCH)
2695 iscsi_cls_session_printk(KERN_ERR, session,
2696 "Cannot notify userspace of session "
2697 "event %u. Check iscsi daemon\n",
2698 event);
2699
2700 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2701 event, rc);
2702 return rc;
2703 }
2704 EXPORT_SYMBOL_GPL(iscsi_session_event);
2705
2706 static int
2707 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2708 struct iscsi_uevent *ev, pid_t pid,
2709 uint32_t initial_cmdsn, uint16_t cmds_max,
2710 uint16_t queue_depth)
2711 {
2712 struct iscsi_transport *transport = priv->iscsi_transport;
2713 struct iscsi_cls_session *session;
2714 struct Scsi_Host *shost;
2715
2716 session = transport->create_session(ep, cmds_max, queue_depth,
2717 initial_cmdsn);
2718 if (!session)
2719 return -ENOMEM;
2720
2721 session->creator = pid;
2722 shost = iscsi_session_to_shost(session);
2723 ev->r.c_session_ret.host_no = shost->host_no;
2724 ev->r.c_session_ret.sid = session->sid;
2725 ISCSI_DBG_TRANS_SESSION(session,
2726 "Completed creating transport session\n");
2727 return 0;
2728 }
2729
2730 static int
2731 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2732 {
2733 struct iscsi_cls_conn *conn;
2734 struct iscsi_cls_session *session;
2735
2736 session = iscsi_session_lookup(ev->u.c_conn.sid);
2737 if (!session) {
2738 printk(KERN_ERR "iscsi: invalid session %d.\n",
2739 ev->u.c_conn.sid);
2740 return -EINVAL;
2741 }
2742
2743 conn = transport->create_conn(session, ev->u.c_conn.cid);
2744 if (!conn) {
2745 iscsi_cls_session_printk(KERN_ERR, session,
2746 "couldn't create a new connection.");
2747 return -ENOMEM;
2748 }
2749
2750 ev->r.c_conn_ret.sid = session->sid;
2751 ev->r.c_conn_ret.cid = conn->cid;
2752
2753 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2754 return 0;
2755 }
2756
2757 static int
2758 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2759 {
2760 struct iscsi_cls_conn *conn;
2761
2762 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2763 if (!conn)
2764 return -EINVAL;
2765
2766 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2767 if (transport->destroy_conn)
2768 transport->destroy_conn(conn);
2769
2770 return 0;
2771 }
2772
2773 static int
2774 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2775 {
2776 char *data = (char*)ev + sizeof(*ev);
2777 struct iscsi_cls_conn *conn;
2778 struct iscsi_cls_session *session;
2779 int err = 0, value = 0;
2780
2781 session = iscsi_session_lookup(ev->u.set_param.sid);
2782 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2783 if (!conn || !session)
2784 return -EINVAL;
2785
2786 switch (ev->u.set_param.param) {
2787 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2788 sscanf(data, "%d", &value);
2789 if (!session->recovery_tmo_sysfs_override)
2790 session->recovery_tmo = value;
2791 break;
2792 default:
2793 err = transport->set_param(conn, ev->u.set_param.param,
2794 data, ev->u.set_param.len);
2795 }
2796
2797 return err;
2798 }
2799
2800 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2801 struct iscsi_uevent *ev, int msg_type)
2802 {
2803 struct iscsi_endpoint *ep;
2804 struct sockaddr *dst_addr;
2805 struct Scsi_Host *shost = NULL;
2806 int non_blocking, err = 0;
2807
2808 if (!transport->ep_connect)
2809 return -EINVAL;
2810
2811 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2812 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2813 if (!shost) {
2814 printk(KERN_ERR "ep connect failed. Could not find "
2815 "host no %u\n",
2816 ev->u.ep_connect_through_host.host_no);
2817 return -ENODEV;
2818 }
2819 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2820 } else
2821 non_blocking = ev->u.ep_connect.non_blocking;
2822
2823 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2824 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2825 if (IS_ERR(ep)) {
2826 err = PTR_ERR(ep);
2827 goto release_host;
2828 }
2829
2830 ev->r.ep_connect_ret.handle = ep->id;
2831 release_host:
2832 if (shost)
2833 scsi_host_put(shost);
2834 return err;
2835 }
2836
2837 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2838 u64 ep_handle)
2839 {
2840 struct iscsi_cls_conn *conn;
2841 struct iscsi_endpoint *ep;
2842
2843 if (!transport->ep_disconnect)
2844 return -EINVAL;
2845
2846 ep = iscsi_lookup_endpoint(ep_handle);
2847 if (!ep)
2848 return -EINVAL;
2849 conn = ep->conn;
2850 if (conn) {
2851 mutex_lock(&conn->ep_mutex);
2852 conn->ep = NULL;
2853 mutex_unlock(&conn->ep_mutex);
2854 }
2855
2856 transport->ep_disconnect(ep);
2857 return 0;
2858 }
2859
2860 static int
2861 iscsi_if_transport_ep(struct iscsi_transport *transport,
2862 struct iscsi_uevent *ev, int msg_type)
2863 {
2864 struct iscsi_endpoint *ep;
2865 int rc = 0;
2866
2867 switch (msg_type) {
2868 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2869 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2870 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2871 break;
2872 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2873 if (!transport->ep_poll)
2874 return -EINVAL;
2875
2876 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2877 if (!ep)
2878 return -EINVAL;
2879
2880 ev->r.retcode = transport->ep_poll(ep,
2881 ev->u.ep_poll.timeout_ms);
2882 break;
2883 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2884 rc = iscsi_if_ep_disconnect(transport,
2885 ev->u.ep_disconnect.ep_handle);
2886 break;
2887 }
2888 return rc;
2889 }
2890
2891 static int
2892 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2893 struct iscsi_uevent *ev)
2894 {
2895 struct Scsi_Host *shost;
2896 struct sockaddr *dst_addr;
2897 int err;
2898
2899 if (!transport->tgt_dscvr)
2900 return -EINVAL;
2901
2902 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2903 if (!shost) {
2904 printk(KERN_ERR "target discovery could not find host no %u\n",
2905 ev->u.tgt_dscvr.host_no);
2906 return -ENODEV;
2907 }
2908
2909
2910 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2911 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2912 ev->u.tgt_dscvr.enable, dst_addr);
2913 scsi_host_put(shost);
2914 return err;
2915 }
2916
2917 static int
2918 iscsi_set_host_param(struct iscsi_transport *transport,
2919 struct iscsi_uevent *ev)
2920 {
2921 char *data = (char*)ev + sizeof(*ev);
2922 struct Scsi_Host *shost;
2923 int err;
2924
2925 if (!transport->set_host_param)
2926 return -ENOSYS;
2927
2928 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2929 if (!shost) {
2930 printk(KERN_ERR "set_host_param could not find host no %u\n",
2931 ev->u.set_host_param.host_no);
2932 return -ENODEV;
2933 }
2934
2935 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2936 data, ev->u.set_host_param.len);
2937 scsi_host_put(shost);
2938 return err;
2939 }
2940
2941 static int
2942 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2943 {
2944 struct Scsi_Host *shost;
2945 struct iscsi_path *params;
2946 int err;
2947
2948 if (!transport->set_path)
2949 return -ENOSYS;
2950
2951 shost = scsi_host_lookup(ev->u.set_path.host_no);
2952 if (!shost) {
2953 printk(KERN_ERR "set path could not find host no %u\n",
2954 ev->u.set_path.host_no);
2955 return -ENODEV;
2956 }
2957
2958 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2959 err = transport->set_path(shost, params);
2960
2961 scsi_host_put(shost);
2962 return err;
2963 }
2964
2965 static int
2966 iscsi_set_iface_params(struct iscsi_transport *transport,
2967 struct iscsi_uevent *ev, uint32_t len)
2968 {
2969 char *data = (char *)ev + sizeof(*ev);
2970 struct Scsi_Host *shost;
2971 int err;
2972
2973 if (!transport->set_iface_param)
2974 return -ENOSYS;
2975
2976 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2977 if (!shost) {
2978 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2979 ev->u.set_iface_params.host_no);
2980 return -ENODEV;
2981 }
2982
2983 err = transport->set_iface_param(shost, data, len);
2984 scsi_host_put(shost);
2985 return err;
2986 }
2987
2988 static int
2989 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2990 {
2991 struct Scsi_Host *shost;
2992 struct sockaddr *dst_addr;
2993 int err;
2994
2995 if (!transport->send_ping)
2996 return -ENOSYS;
2997
2998 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
2999 if (!shost) {
3000 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3001 ev->u.iscsi_ping.host_no);
3002 return -ENODEV;
3003 }
3004
3005 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3006 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3007 ev->u.iscsi_ping.iface_type,
3008 ev->u.iscsi_ping.payload_size,
3009 ev->u.iscsi_ping.pid,
3010 dst_addr);
3011 scsi_host_put(shost);
3012 return err;
3013 }
3014
3015 static int
3016 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3017 {
3018 struct iscsi_uevent *ev = nlmsg_data(nlh);
3019 struct Scsi_Host *shost = NULL;
3020 struct iscsi_chap_rec *chap_rec;
3021 struct iscsi_internal *priv;
3022 struct sk_buff *skbchap;
3023 struct nlmsghdr *nlhchap;
3024 struct iscsi_uevent *evchap;
3025 uint32_t chap_buf_size;
3026 int len, err = 0;
3027 char *buf;
3028
3029 if (!transport->get_chap)
3030 return -EINVAL;
3031
3032 priv = iscsi_if_transport_lookup(transport);
3033 if (!priv)
3034 return -EINVAL;
3035
3036 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3037 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3038
3039 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3040 if (!shost) {
3041 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3042 __func__, ev->u.get_chap.host_no);
3043 return -ENODEV;
3044 }
3045
3046 do {
3047 int actual_size;
3048
3049 skbchap = alloc_skb(len, GFP_KERNEL);
3050 if (!skbchap) {
3051 printk(KERN_ERR "can not deliver chap: OOM\n");
3052 err = -ENOMEM;
3053 goto exit_get_chap;
3054 }
3055
3056 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3057 (len - sizeof(*nlhchap)), 0);
3058 evchap = nlmsg_data(nlhchap);
3059 memset(evchap, 0, sizeof(*evchap));
3060 evchap->transport_handle = iscsi_handle(transport);
3061 evchap->type = nlh->nlmsg_type;
3062 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3063 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3064 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3065 buf = (char *)evchap + sizeof(*evchap);
3066 memset(buf, 0, chap_buf_size);
3067
3068 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3069 &evchap->u.get_chap.num_entries, buf);
3070
3071 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3072 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3073 nlhchap->nlmsg_len = actual_size;
3074
3075 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3076 GFP_KERNEL);
3077 } while (err < 0 && err != -ECONNREFUSED);
3078
3079 exit_get_chap:
3080 scsi_host_put(shost);
3081 return err;
3082 }
3083
3084 static int iscsi_set_chap(struct iscsi_transport *transport,
3085 struct iscsi_uevent *ev, uint32_t len)
3086 {
3087 char *data = (char *)ev + sizeof(*ev);
3088 struct Scsi_Host *shost;
3089 int err = 0;
3090
3091 if (!transport->set_chap)
3092 return -ENOSYS;
3093
3094 shost = scsi_host_lookup(ev->u.set_path.host_no);
3095 if (!shost) {
3096 pr_err("%s could not find host no %u\n",
3097 __func__, ev->u.set_path.host_no);
3098 return -ENODEV;
3099 }
3100
3101 err = transport->set_chap(shost, data, len);
3102 scsi_host_put(shost);
3103 return err;
3104 }
3105
3106 static int iscsi_delete_chap(struct iscsi_transport *transport,
3107 struct iscsi_uevent *ev)
3108 {
3109 struct Scsi_Host *shost;
3110 int err = 0;
3111
3112 if (!transport->delete_chap)
3113 return -ENOSYS;
3114
3115 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3116 if (!shost) {
3117 printk(KERN_ERR "%s could not find host no %u\n",
3118 __func__, ev->u.delete_chap.host_no);
3119 return -ENODEV;
3120 }
3121
3122 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3123 scsi_host_put(shost);
3124 return err;
3125 }
3126
3127 static const struct {
3128 enum iscsi_discovery_parent_type value;
3129 char *name;
3130 } iscsi_discovery_parent_names[] = {
3131 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3132 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3133 {ISCSI_DISC_PARENT_ISNS, "isns" },
3134 };
3135
3136 char *iscsi_get_discovery_parent_name(int parent_type)
3137 {
3138 int i;
3139 char *state = "Unknown!";
3140
3141 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3142 if (iscsi_discovery_parent_names[i].value & parent_type) {
3143 state = iscsi_discovery_parent_names[i].name;
3144 break;
3145 }
3146 }
3147 return state;
3148 }
3149 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3150
3151 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3152 struct iscsi_uevent *ev, uint32_t len)
3153 {
3154 char *data = (char *)ev + sizeof(*ev);
3155 struct Scsi_Host *shost;
3156 struct iscsi_bus_flash_session *fnode_sess;
3157 struct iscsi_bus_flash_conn *fnode_conn;
3158 struct device *dev;
3159 uint32_t idx;
3160 int err = 0;
3161
3162 if (!transport->set_flashnode_param) {
3163 err = -ENOSYS;
3164 goto exit_set_fnode;
3165 }
3166
3167 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3168 if (!shost) {
3169 pr_err("%s could not find host no %u\n",
3170 __func__, ev->u.set_flashnode.host_no);
3171 err = -ENODEV;
3172 goto put_host;
3173 }
3174
3175 idx = ev->u.set_flashnode.flashnode_idx;
3176 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3177 if (!fnode_sess) {
3178 pr_err("%s could not find flashnode %u for host no %u\n",
3179 __func__, idx, ev->u.set_flashnode.host_no);
3180 err = -ENODEV;
3181 goto put_host;
3182 }
3183
3184 dev = iscsi_find_flashnode_conn(fnode_sess);
3185 if (!dev) {
3186 err = -ENODEV;
3187 goto put_sess;
3188 }
3189
3190 fnode_conn = iscsi_dev_to_flash_conn(dev);
3191 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3192 put_device(dev);
3193
3194 put_sess:
3195 put_device(&fnode_sess->dev);
3196
3197 put_host:
3198 scsi_host_put(shost);
3199
3200 exit_set_fnode:
3201 return err;
3202 }
3203
3204 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3205 struct iscsi_uevent *ev, uint32_t len)
3206 {
3207 char *data = (char *)ev + sizeof(*ev);
3208 struct Scsi_Host *shost;
3209 int index;
3210 int err = 0;
3211
3212 if (!transport->new_flashnode) {
3213 err = -ENOSYS;
3214 goto exit_new_fnode;
3215 }
3216
3217 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3218 if (!shost) {
3219 pr_err("%s could not find host no %u\n",
3220 __func__, ev->u.new_flashnode.host_no);
3221 err = -ENODEV;
3222 goto put_host;
3223 }
3224
3225 index = transport->new_flashnode(shost, data, len);
3226
3227 if (index >= 0)
3228 ev->r.new_flashnode_ret.flashnode_idx = index;
3229 else
3230 err = -EIO;
3231
3232 put_host:
3233 scsi_host_put(shost);
3234
3235 exit_new_fnode:
3236 return err;
3237 }
3238
3239 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3240 struct iscsi_uevent *ev)
3241 {
3242 struct Scsi_Host *shost;
3243 struct iscsi_bus_flash_session *fnode_sess;
3244 uint32_t idx;
3245 int err = 0;
3246
3247 if (!transport->del_flashnode) {
3248 err = -ENOSYS;
3249 goto exit_del_fnode;
3250 }
3251
3252 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3253 if (!shost) {
3254 pr_err("%s could not find host no %u\n",
3255 __func__, ev->u.del_flashnode.host_no);
3256 err = -ENODEV;
3257 goto put_host;
3258 }
3259
3260 idx = ev->u.del_flashnode.flashnode_idx;
3261 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3262 if (!fnode_sess) {
3263 pr_err("%s could not find flashnode %u for host no %u\n",
3264 __func__, idx, ev->u.del_flashnode.host_no);
3265 err = -ENODEV;
3266 goto put_host;
3267 }
3268
3269 err = transport->del_flashnode(fnode_sess);
3270 put_device(&fnode_sess->dev);
3271
3272 put_host:
3273 scsi_host_put(shost);
3274
3275 exit_del_fnode:
3276 return err;
3277 }
3278
3279 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3280 struct iscsi_uevent *ev)
3281 {
3282 struct Scsi_Host *shost;
3283 struct iscsi_bus_flash_session *fnode_sess;
3284 struct iscsi_bus_flash_conn *fnode_conn;
3285 struct device *dev;
3286 uint32_t idx;
3287 int err = 0;
3288
3289 if (!transport->login_flashnode) {
3290 err = -ENOSYS;
3291 goto exit_login_fnode;
3292 }
3293
3294 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3295 if (!shost) {
3296 pr_err("%s could not find host no %u\n",
3297 __func__, ev->u.login_flashnode.host_no);
3298 err = -ENODEV;
3299 goto put_host;
3300 }
3301
3302 idx = ev->u.login_flashnode.flashnode_idx;
3303 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3304 if (!fnode_sess) {
3305 pr_err("%s could not find flashnode %u for host no %u\n",
3306 __func__, idx, ev->u.login_flashnode.host_no);
3307 err = -ENODEV;
3308 goto put_host;
3309 }
3310
3311 dev = iscsi_find_flashnode_conn(fnode_sess);
3312 if (!dev) {
3313 err = -ENODEV;
3314 goto put_sess;
3315 }
3316
3317 fnode_conn = iscsi_dev_to_flash_conn(dev);
3318 err = transport->login_flashnode(fnode_sess, fnode_conn);
3319 put_device(dev);
3320
3321 put_sess:
3322 put_device(&fnode_sess->dev);
3323
3324 put_host:
3325 scsi_host_put(shost);
3326
3327 exit_login_fnode:
3328 return err;
3329 }
3330
3331 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3332 struct iscsi_uevent *ev)
3333 {
3334 struct Scsi_Host *shost;
3335 struct iscsi_bus_flash_session *fnode_sess;
3336 struct iscsi_bus_flash_conn *fnode_conn;
3337 struct device *dev;
3338 uint32_t idx;
3339 int err = 0;
3340
3341 if (!transport->logout_flashnode) {
3342 err = -ENOSYS;
3343 goto exit_logout_fnode;
3344 }
3345
3346 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3347 if (!shost) {
3348 pr_err("%s could not find host no %u\n",
3349 __func__, ev->u.logout_flashnode.host_no);
3350 err = -ENODEV;
3351 goto put_host;
3352 }
3353
3354 idx = ev->u.logout_flashnode.flashnode_idx;
3355 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3356 if (!fnode_sess) {
3357 pr_err("%s could not find flashnode %u for host no %u\n",
3358 __func__, idx, ev->u.logout_flashnode.host_no);
3359 err = -ENODEV;
3360 goto put_host;
3361 }
3362
3363 dev = iscsi_find_flashnode_conn(fnode_sess);
3364 if (!dev) {
3365 err = -ENODEV;
3366 goto put_sess;
3367 }
3368
3369 fnode_conn = iscsi_dev_to_flash_conn(dev);
3370
3371 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3372 put_device(dev);
3373
3374 put_sess:
3375 put_device(&fnode_sess->dev);
3376
3377 put_host:
3378 scsi_host_put(shost);
3379
3380 exit_logout_fnode:
3381 return err;
3382 }
3383
3384 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3385 struct iscsi_uevent *ev)
3386 {
3387 struct Scsi_Host *shost;
3388 struct iscsi_cls_session *session;
3389 int err = 0;
3390
3391 if (!transport->logout_flashnode_sid) {
3392 err = -ENOSYS;
3393 goto exit_logout_sid;
3394 }
3395
3396 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3397 if (!shost) {
3398 pr_err("%s could not find host no %u\n",
3399 __func__, ev->u.logout_flashnode.host_no);
3400 err = -ENODEV;
3401 goto put_host;
3402 }
3403
3404 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3405 if (!session) {
3406 pr_err("%s could not find session id %u\n",
3407 __func__, ev->u.logout_flashnode_sid.sid);
3408 err = -EINVAL;
3409 goto put_host;
3410 }
3411
3412 err = transport->logout_flashnode_sid(session);
3413
3414 put_host:
3415 scsi_host_put(shost);
3416
3417 exit_logout_sid:
3418 return err;
3419 }
3420
3421 static int
3422 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3423 {
3424 struct iscsi_uevent *ev = nlmsg_data(nlh);
3425 struct Scsi_Host *shost = NULL;
3426 struct iscsi_internal *priv;
3427 struct sk_buff *skbhost_stats;
3428 struct nlmsghdr *nlhhost_stats;
3429 struct iscsi_uevent *evhost_stats;
3430 int host_stats_size = 0;
3431 int len, err = 0;
3432 char *buf;
3433
3434 if (!transport->get_host_stats)
3435 return -ENOSYS;
3436
3437 priv = iscsi_if_transport_lookup(transport);
3438 if (!priv)
3439 return -EINVAL;
3440
3441 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3442 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3443
3444 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3445 if (!shost) {
3446 pr_err("%s: failed. Cound not find host no %u\n",
3447 __func__, ev->u.get_host_stats.host_no);
3448 return -ENODEV;
3449 }
3450
3451 do {
3452 int actual_size;
3453
3454 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3455 if (!skbhost_stats) {
3456 pr_err("cannot deliver host stats: OOM\n");
3457 err = -ENOMEM;
3458 goto exit_host_stats;
3459 }
3460
3461 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3462 (len - sizeof(*nlhhost_stats)), 0);
3463 evhost_stats = nlmsg_data(nlhhost_stats);
3464 memset(evhost_stats, 0, sizeof(*evhost_stats));
3465 evhost_stats->transport_handle = iscsi_handle(transport);
3466 evhost_stats->type = nlh->nlmsg_type;
3467 evhost_stats->u.get_host_stats.host_no =
3468 ev->u.get_host_stats.host_no;
3469 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3470 memset(buf, 0, host_stats_size);
3471
3472 err = transport->get_host_stats(shost, buf, host_stats_size);
3473 if (err) {
3474 kfree_skb(skbhost_stats);
3475 goto exit_host_stats;
3476 }
3477
3478 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3479 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3480 nlhhost_stats->nlmsg_len = actual_size;
3481
3482 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3483 GFP_KERNEL);
3484 } while (err < 0 && err != -ECONNREFUSED);
3485
3486 exit_host_stats:
3487 scsi_host_put(shost);
3488 return err;
3489 }
3490
3491
3492 static int
3493 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3494 {
3495 int err = 0;
3496 struct iscsi_uevent *ev = nlmsg_data(nlh);
3497 struct iscsi_transport *transport = NULL;
3498 struct iscsi_internal *priv;
3499 struct iscsi_cls_session *session;
3500 struct iscsi_cls_conn *conn;
3501 struct iscsi_endpoint *ep = NULL;
3502
3503 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3504 *group = ISCSI_NL_GRP_UIP;
3505 else
3506 *group = ISCSI_NL_GRP_ISCSID;
3507
3508 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3509 if (!priv)
3510 return -EINVAL;
3511 transport = priv->iscsi_transport;
3512
3513 if (!try_module_get(transport->owner))
3514 return -EINVAL;
3515
3516 switch (nlh->nlmsg_type) {
3517 case ISCSI_UEVENT_CREATE_SESSION:
3518 err = iscsi_if_create_session(priv, ep, ev,
3519 NETLINK_CB(skb).portid,
3520 ev->u.c_session.initial_cmdsn,
3521 ev->u.c_session.cmds_max,
3522 ev->u.c_session.queue_depth);
3523 break;
3524 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3525 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3526 if (!ep) {
3527 err = -EINVAL;
3528 break;
3529 }
3530
3531 err = iscsi_if_create_session(priv, ep, ev,
3532 NETLINK_CB(skb).portid,
3533 ev->u.c_bound_session.initial_cmdsn,
3534 ev->u.c_bound_session.cmds_max,
3535 ev->u.c_bound_session.queue_depth);
3536 break;
3537 case ISCSI_UEVENT_DESTROY_SESSION:
3538 session = iscsi_session_lookup(ev->u.d_session.sid);
3539 if (session)
3540 transport->destroy_session(session);
3541 else
3542 err = -EINVAL;
3543 break;
3544 case ISCSI_UEVENT_UNBIND_SESSION:
3545 session = iscsi_session_lookup(ev->u.d_session.sid);
3546 if (session)
3547 scsi_queue_work(iscsi_session_to_shost(session),
3548 &session->unbind_work);
3549 else
3550 err = -EINVAL;
3551 break;
3552 case ISCSI_UEVENT_CREATE_CONN:
3553 err = iscsi_if_create_conn(transport, ev);
3554 break;
3555 case ISCSI_UEVENT_DESTROY_CONN:
3556 err = iscsi_if_destroy_conn(transport, ev);
3557 break;
3558 case ISCSI_UEVENT_BIND_CONN:
3559 session = iscsi_session_lookup(ev->u.b_conn.sid);
3560 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3561
3562 if (conn && conn->ep)
3563 iscsi_if_ep_disconnect(transport, conn->ep->id);
3564
3565 if (!session || !conn) {
3566 err = -EINVAL;
3567 break;
3568 }
3569
3570 ev->r.retcode = transport->bind_conn(session, conn,
3571 ev->u.b_conn.transport_eph,
3572 ev->u.b_conn.is_leading);
3573 if (ev->r.retcode || !transport->ep_connect)
3574 break;
3575
3576 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3577 if (ep) {
3578 ep->conn = conn;
3579
3580 mutex_lock(&conn->ep_mutex);
3581 conn->ep = ep;
3582 mutex_unlock(&conn->ep_mutex);
3583 } else
3584 iscsi_cls_conn_printk(KERN_ERR, conn,
3585 "Could not set ep conn "
3586 "binding\n");
3587 break;
3588 case ISCSI_UEVENT_SET_PARAM:
3589 err = iscsi_set_param(transport, ev);
3590 break;
3591 case ISCSI_UEVENT_START_CONN:
3592 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3593 if (conn)
3594 ev->r.retcode = transport->start_conn(conn);
3595 else
3596 err = -EINVAL;
3597 break;
3598 case ISCSI_UEVENT_STOP_CONN:
3599 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3600 if (conn)
3601 transport->stop_conn(conn, ev->u.stop_conn.flag);
3602 else
3603 err = -EINVAL;
3604 break;
3605 case ISCSI_UEVENT_SEND_PDU:
3606 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3607 if (conn)
3608 ev->r.retcode = transport->send_pdu(conn,
3609 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3610 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3611 ev->u.send_pdu.data_size);
3612 else
3613 err = -EINVAL;
3614 break;
3615 case ISCSI_UEVENT_GET_STATS:
3616 err = iscsi_if_get_stats(transport, nlh);
3617 break;
3618 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3619 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3620 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3621 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3622 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3623 break;
3624 case ISCSI_UEVENT_TGT_DSCVR:
3625 err = iscsi_tgt_dscvr(transport, ev);
3626 break;
3627 case ISCSI_UEVENT_SET_HOST_PARAM:
3628 err = iscsi_set_host_param(transport, ev);
3629 break;
3630 case ISCSI_UEVENT_PATH_UPDATE:
3631 err = iscsi_set_path(transport, ev);
3632 break;
3633 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3634 err = iscsi_set_iface_params(transport, ev,
3635 nlmsg_attrlen(nlh, sizeof(*ev)));
3636 break;
3637 case ISCSI_UEVENT_PING:
3638 err = iscsi_send_ping(transport, ev);
3639 break;
3640 case ISCSI_UEVENT_GET_CHAP:
3641 err = iscsi_get_chap(transport, nlh);
3642 break;
3643 case ISCSI_UEVENT_DELETE_CHAP:
3644 err = iscsi_delete_chap(transport, ev);
3645 break;
3646 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3647 err = iscsi_set_flashnode_param(transport, ev,
3648 nlmsg_attrlen(nlh,
3649 sizeof(*ev)));
3650 break;
3651 case ISCSI_UEVENT_NEW_FLASHNODE:
3652 err = iscsi_new_flashnode(transport, ev,
3653 nlmsg_attrlen(nlh, sizeof(*ev)));
3654 break;
3655 case ISCSI_UEVENT_DEL_FLASHNODE:
3656 err = iscsi_del_flashnode(transport, ev);
3657 break;
3658 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3659 err = iscsi_login_flashnode(transport, ev);
3660 break;
3661 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3662 err = iscsi_logout_flashnode(transport, ev);
3663 break;
3664 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3665 err = iscsi_logout_flashnode_sid(transport, ev);
3666 break;
3667 case ISCSI_UEVENT_SET_CHAP:
3668 err = iscsi_set_chap(transport, ev,
3669 nlmsg_attrlen(nlh, sizeof(*ev)));
3670 break;
3671 case ISCSI_UEVENT_GET_HOST_STATS:
3672 err = iscsi_get_host_stats(transport, nlh);
3673 break;
3674 default:
3675 err = -ENOSYS;
3676 break;
3677 }
3678
3679 module_put(transport->owner);
3680 return err;
3681 }
3682
3683 /*
3684 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3685 * Malformed skbs with wrong lengths or invalid creds are not processed.
3686 */
3687 static void
3688 iscsi_if_rx(struct sk_buff *skb)
3689 {
3690 mutex_lock(&rx_queue_mutex);
3691 while (skb->len >= NLMSG_HDRLEN) {
3692 int err;
3693 uint32_t rlen;
3694 struct nlmsghdr *nlh;
3695 struct iscsi_uevent *ev;
3696 uint32_t group;
3697
3698 nlh = nlmsg_hdr(skb);
3699 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3700 skb->len < nlh->nlmsg_len) {
3701 break;
3702 }
3703
3704 ev = nlmsg_data(nlh);
3705 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3706 if (rlen > skb->len)
3707 rlen = skb->len;
3708
3709 err = iscsi_if_recv_msg(skb, nlh, &group);
3710 if (err) {
3711 ev->type = ISCSI_KEVENT_IF_ERROR;
3712 ev->iferror = err;
3713 }
3714 do {
3715 /*
3716 * special case for GET_STATS:
3717 * on success - sending reply and stats from
3718 * inside of if_recv_msg(),
3719 * on error - fall through.
3720 */
3721 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3722 break;
3723 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3724 break;
3725 err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
3726 nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
3727 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3728 skb_pull(skb, rlen);
3729 }
3730 mutex_unlock(&rx_queue_mutex);
3731 }
3732
3733 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3734 struct device_attribute dev_attr_##_prefix##_##_name = \
3735 __ATTR(_name,_mode,_show,_store)
3736
3737 /*
3738 * iSCSI connection attrs
3739 */
3740 #define iscsi_conn_attr_show(param) \
3741 static ssize_t \
3742 show_conn_param_##param(struct device *dev, \
3743 struct device_attribute *attr, char *buf) \
3744 { \
3745 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3746 struct iscsi_transport *t = conn->transport; \
3747 return t->get_conn_param(conn, param, buf); \
3748 }
3749
3750 #define iscsi_conn_attr(field, param) \
3751 iscsi_conn_attr_show(param) \
3752 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3753 NULL);
3754
3755 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3756 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3757 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3758 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3759 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3760 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3761 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3762 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3763 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3764 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3765 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3766 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3767 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3768 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3769 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3770 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3771 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3772 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3773 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3774 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3775 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3776 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3777 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3778 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3779 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3780 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3781 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3782 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3783
3784
3785 #define iscsi_conn_ep_attr_show(param) \
3786 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3787 struct device_attribute *attr,\
3788 char *buf) \
3789 { \
3790 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3791 struct iscsi_transport *t = conn->transport; \
3792 struct iscsi_endpoint *ep; \
3793 ssize_t rc; \
3794 \
3795 /* \
3796 * Need to make sure ep_disconnect does not free the LLD's \
3797 * interconnect resources while we are trying to read them. \
3798 */ \
3799 mutex_lock(&conn->ep_mutex); \
3800 ep = conn->ep; \
3801 if (!ep && t->ep_connect) { \
3802 mutex_unlock(&conn->ep_mutex); \
3803 return -ENOTCONN; \
3804 } \
3805 \
3806 if (ep) \
3807 rc = t->get_ep_param(ep, param, buf); \
3808 else \
3809 rc = t->get_conn_param(conn, param, buf); \
3810 mutex_unlock(&conn->ep_mutex); \
3811 return rc; \
3812 }
3813
3814 #define iscsi_conn_ep_attr(field, param) \
3815 iscsi_conn_ep_attr_show(param) \
3816 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3817 show_conn_ep_param_##param, NULL);
3818
3819 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3820 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3821
3822 static struct attribute *iscsi_conn_attrs[] = {
3823 &dev_attr_conn_max_recv_dlength.attr,
3824 &dev_attr_conn_max_xmit_dlength.attr,
3825 &dev_attr_conn_header_digest.attr,
3826 &dev_attr_conn_data_digest.attr,
3827 &dev_attr_conn_ifmarker.attr,
3828 &dev_attr_conn_ofmarker.attr,
3829 &dev_attr_conn_address.attr,
3830 &dev_attr_conn_port.attr,
3831 &dev_attr_conn_exp_statsn.attr,
3832 &dev_attr_conn_persistent_address.attr,
3833 &dev_attr_conn_persistent_port.attr,
3834 &dev_attr_conn_ping_tmo.attr,
3835 &dev_attr_conn_recv_tmo.attr,
3836 &dev_attr_conn_local_port.attr,
3837 &dev_attr_conn_statsn.attr,
3838 &dev_attr_conn_keepalive_tmo.attr,
3839 &dev_attr_conn_max_segment_size.attr,
3840 &dev_attr_conn_tcp_timestamp_stat.attr,
3841 &dev_attr_conn_tcp_wsf_disable.attr,
3842 &dev_attr_conn_tcp_nagle_disable.attr,
3843 &dev_attr_conn_tcp_timer_scale.attr,
3844 &dev_attr_conn_tcp_timestamp_enable.attr,
3845 &dev_attr_conn_fragment_disable.attr,
3846 &dev_attr_conn_ipv4_tos.attr,
3847 &dev_attr_conn_ipv6_traffic_class.attr,
3848 &dev_attr_conn_ipv6_flow_label.attr,
3849 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3850 &dev_attr_conn_tcp_xmit_wsf.attr,
3851 &dev_attr_conn_tcp_recv_wsf.attr,
3852 &dev_attr_conn_local_ipaddr.attr,
3853 NULL,
3854 };
3855
3856 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3857 struct attribute *attr, int i)
3858 {
3859 struct device *cdev = container_of(kobj, struct device, kobj);
3860 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3861 struct iscsi_transport *t = conn->transport;
3862 int param;
3863
3864 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3865 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3866 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3867 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3868 else if (attr == &dev_attr_conn_header_digest.attr)
3869 param = ISCSI_PARAM_HDRDGST_EN;
3870 else if (attr == &dev_attr_conn_data_digest.attr)
3871 param = ISCSI_PARAM_DATADGST_EN;
3872 else if (attr == &dev_attr_conn_ifmarker.attr)
3873 param = ISCSI_PARAM_IFMARKER_EN;
3874 else if (attr == &dev_attr_conn_ofmarker.attr)
3875 param = ISCSI_PARAM_OFMARKER_EN;
3876 else if (attr == &dev_attr_conn_address.attr)
3877 param = ISCSI_PARAM_CONN_ADDRESS;
3878 else if (attr == &dev_attr_conn_port.attr)
3879 param = ISCSI_PARAM_CONN_PORT;
3880 else if (attr == &dev_attr_conn_exp_statsn.attr)
3881 param = ISCSI_PARAM_EXP_STATSN;
3882 else if (attr == &dev_attr_conn_persistent_address.attr)
3883 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3884 else if (attr == &dev_attr_conn_persistent_port.attr)
3885 param = ISCSI_PARAM_PERSISTENT_PORT;
3886 else if (attr == &dev_attr_conn_ping_tmo.attr)
3887 param = ISCSI_PARAM_PING_TMO;
3888 else if (attr == &dev_attr_conn_recv_tmo.attr)
3889 param = ISCSI_PARAM_RECV_TMO;
3890 else if (attr == &dev_attr_conn_local_port.attr)
3891 param = ISCSI_PARAM_LOCAL_PORT;
3892 else if (attr == &dev_attr_conn_statsn.attr)
3893 param = ISCSI_PARAM_STATSN;
3894 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3895 param = ISCSI_PARAM_KEEPALIVE_TMO;
3896 else if (attr == &dev_attr_conn_max_segment_size.attr)
3897 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3898 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3899 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3900 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3901 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3902 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3903 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3904 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3905 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3906 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3907 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3908 else if (attr == &dev_attr_conn_fragment_disable.attr)
3909 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3910 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3911 param = ISCSI_PARAM_IPV4_TOS;
3912 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3913 param = ISCSI_PARAM_IPV6_TC;
3914 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3915 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3916 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3917 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3918 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3919 param = ISCSI_PARAM_TCP_XMIT_WSF;
3920 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3921 param = ISCSI_PARAM_TCP_RECV_WSF;
3922 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3923 param = ISCSI_PARAM_LOCAL_IPADDR;
3924 else {
3925 WARN_ONCE(1, "Invalid conn attr");
3926 return 0;
3927 }
3928
3929 return t->attr_is_visible(ISCSI_PARAM, param);
3930 }
3931
3932 static struct attribute_group iscsi_conn_group = {
3933 .attrs = iscsi_conn_attrs,
3934 .is_visible = iscsi_conn_attr_is_visible,
3935 };
3936
3937 /*
3938 * iSCSI session attrs
3939 */
3940 #define iscsi_session_attr_show(param, perm) \
3941 static ssize_t \
3942 show_session_param_##param(struct device *dev, \
3943 struct device_attribute *attr, char *buf) \
3944 { \
3945 struct iscsi_cls_session *session = \
3946 iscsi_dev_to_session(dev->parent); \
3947 struct iscsi_transport *t = session->transport; \
3948 \
3949 if (perm && !capable(CAP_SYS_ADMIN)) \
3950 return -EACCES; \
3951 return t->get_session_param(session, param, buf); \
3952 }
3953
3954 #define iscsi_session_attr(field, param, perm) \
3955 iscsi_session_attr_show(param, perm) \
3956 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3957 NULL);
3958 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3959 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3960 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3961 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3962 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3963 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3964 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3965 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3966 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3967 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3968 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3969 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3970 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3971 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
3972 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3973 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
3974 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3975 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3976 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3977 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
3978 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3979 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3980 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3981 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3982 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3983 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
3984 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3985 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3986 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3987 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3988 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3989 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3990 iscsi_session_attr(discovery_auth_optional,
3991 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3992 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3993 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3994 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3995 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3996 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3997 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3998 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
3999
4000 static ssize_t
4001 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4002 char *buf)
4003 {
4004 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4005 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4006 }
4007 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4008 NULL);
4009 static ssize_t
4010 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4011 char *buf)
4012 {
4013 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4014 return sprintf(buf, "%d\n", session->creator);
4015 }
4016 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4017 NULL);
4018 static ssize_t
4019 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4020 char *buf)
4021 {
4022 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4023 return sprintf(buf, "%d\n", session->target_id);
4024 }
4025 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4026 show_priv_session_target_id, NULL);
4027
4028 #define iscsi_priv_session_attr_show(field, format) \
4029 static ssize_t \
4030 show_priv_session_##field(struct device *dev, \
4031 struct device_attribute *attr, char *buf) \
4032 { \
4033 struct iscsi_cls_session *session = \
4034 iscsi_dev_to_session(dev->parent); \
4035 if (session->field == -1) \
4036 return sprintf(buf, "off\n"); \
4037 return sprintf(buf, format"\n", session->field); \
4038 }
4039
4040 #define iscsi_priv_session_attr_store(field) \
4041 static ssize_t \
4042 store_priv_session_##field(struct device *dev, \
4043 struct device_attribute *attr, \
4044 const char *buf, size_t count) \
4045 { \
4046 int val; \
4047 char *cp; \
4048 struct iscsi_cls_session *session = \
4049 iscsi_dev_to_session(dev->parent); \
4050 if ((session->state == ISCSI_SESSION_FREE) || \
4051 (session->state == ISCSI_SESSION_FAILED)) \
4052 return -EBUSY; \
4053 if (strncmp(buf, "off", 3) == 0) { \
4054 session->field = -1; \
4055 session->field##_sysfs_override = true; \
4056 } else { \
4057 val = simple_strtoul(buf, &cp, 0); \
4058 if (*cp != '\0' && *cp != '\n') \
4059 return -EINVAL; \
4060 session->field = val; \
4061 session->field##_sysfs_override = true; \
4062 } \
4063 return count; \
4064 }
4065
4066 #define iscsi_priv_session_rw_attr(field, format) \
4067 iscsi_priv_session_attr_show(field, format) \
4068 iscsi_priv_session_attr_store(field) \
4069 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4070 show_priv_session_##field, \
4071 store_priv_session_##field)
4072
4073 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4074
4075 static struct attribute *iscsi_session_attrs[] = {
4076 &dev_attr_sess_initial_r2t.attr,
4077 &dev_attr_sess_max_outstanding_r2t.attr,
4078 &dev_attr_sess_immediate_data.attr,
4079 &dev_attr_sess_first_burst_len.attr,
4080 &dev_attr_sess_max_burst_len.attr,
4081 &dev_attr_sess_data_pdu_in_order.attr,
4082 &dev_attr_sess_data_seq_in_order.attr,
4083 &dev_attr_sess_erl.attr,
4084 &dev_attr_sess_targetname.attr,
4085 &dev_attr_sess_tpgt.attr,
4086 &dev_attr_sess_password.attr,
4087 &dev_attr_sess_password_in.attr,
4088 &dev_attr_sess_username.attr,
4089 &dev_attr_sess_username_in.attr,
4090 &dev_attr_sess_fast_abort.attr,
4091 &dev_attr_sess_abort_tmo.attr,
4092 &dev_attr_sess_lu_reset_tmo.attr,
4093 &dev_attr_sess_tgt_reset_tmo.attr,
4094 &dev_attr_sess_ifacename.attr,
4095 &dev_attr_sess_initiatorname.attr,
4096 &dev_attr_sess_targetalias.attr,
4097 &dev_attr_sess_boot_root.attr,
4098 &dev_attr_sess_boot_nic.attr,
4099 &dev_attr_sess_boot_target.attr,
4100 &dev_attr_priv_sess_recovery_tmo.attr,
4101 &dev_attr_priv_sess_state.attr,
4102 &dev_attr_priv_sess_creator.attr,
4103 &dev_attr_sess_chap_out_idx.attr,
4104 &dev_attr_sess_chap_in_idx.attr,
4105 &dev_attr_priv_sess_target_id.attr,
4106 &dev_attr_sess_auto_snd_tgt_disable.attr,
4107 &dev_attr_sess_discovery_session.attr,
4108 &dev_attr_sess_portal_type.attr,
4109 &dev_attr_sess_chap_auth.attr,
4110 &dev_attr_sess_discovery_logout.attr,
4111 &dev_attr_sess_bidi_chap.attr,
4112 &dev_attr_sess_discovery_auth_optional.attr,
4113 &dev_attr_sess_def_time2wait.attr,
4114 &dev_attr_sess_def_time2retain.attr,
4115 &dev_attr_sess_isid.attr,
4116 &dev_attr_sess_tsid.attr,
4117 &dev_attr_sess_def_taskmgmt_tmo.attr,
4118 &dev_attr_sess_discovery_parent_idx.attr,
4119 &dev_attr_sess_discovery_parent_type.attr,
4120 NULL,
4121 };
4122
4123 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4124 struct attribute *attr, int i)
4125 {
4126 struct device *cdev = container_of(kobj, struct device, kobj);
4127 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4128 struct iscsi_transport *t = session->transport;
4129 int param;
4130
4131 if (attr == &dev_attr_sess_initial_r2t.attr)
4132 param = ISCSI_PARAM_INITIAL_R2T_EN;
4133 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4134 param = ISCSI_PARAM_MAX_R2T;
4135 else if (attr == &dev_attr_sess_immediate_data.attr)
4136 param = ISCSI_PARAM_IMM_DATA_EN;
4137 else if (attr == &dev_attr_sess_first_burst_len.attr)
4138 param = ISCSI_PARAM_FIRST_BURST;
4139 else if (attr == &dev_attr_sess_max_burst_len.attr)
4140 param = ISCSI_PARAM_MAX_BURST;
4141 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4142 param = ISCSI_PARAM_PDU_INORDER_EN;
4143 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4144 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4145 else if (attr == &dev_attr_sess_erl.attr)
4146 param = ISCSI_PARAM_ERL;
4147 else if (attr == &dev_attr_sess_targetname.attr)
4148 param = ISCSI_PARAM_TARGET_NAME;
4149 else if (attr == &dev_attr_sess_tpgt.attr)
4150 param = ISCSI_PARAM_TPGT;
4151 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4152 param = ISCSI_PARAM_CHAP_IN_IDX;
4153 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4154 param = ISCSI_PARAM_CHAP_OUT_IDX;
4155 else if (attr == &dev_attr_sess_password.attr)
4156 param = ISCSI_PARAM_USERNAME;
4157 else if (attr == &dev_attr_sess_password_in.attr)
4158 param = ISCSI_PARAM_USERNAME_IN;
4159 else if (attr == &dev_attr_sess_username.attr)
4160 param = ISCSI_PARAM_PASSWORD;
4161 else if (attr == &dev_attr_sess_username_in.attr)
4162 param = ISCSI_PARAM_PASSWORD_IN;
4163 else if (attr == &dev_attr_sess_fast_abort.attr)
4164 param = ISCSI_PARAM_FAST_ABORT;
4165 else if (attr == &dev_attr_sess_abort_tmo.attr)
4166 param = ISCSI_PARAM_ABORT_TMO;
4167 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4168 param = ISCSI_PARAM_LU_RESET_TMO;
4169 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4170 param = ISCSI_PARAM_TGT_RESET_TMO;
4171 else if (attr == &dev_attr_sess_ifacename.attr)
4172 param = ISCSI_PARAM_IFACE_NAME;
4173 else if (attr == &dev_attr_sess_initiatorname.attr)
4174 param = ISCSI_PARAM_INITIATOR_NAME;
4175 else if (attr == &dev_attr_sess_targetalias.attr)
4176 param = ISCSI_PARAM_TARGET_ALIAS;
4177 else if (attr == &dev_attr_sess_boot_root.attr)
4178 param = ISCSI_PARAM_BOOT_ROOT;
4179 else if (attr == &dev_attr_sess_boot_nic.attr)
4180 param = ISCSI_PARAM_BOOT_NIC;
4181 else if (attr == &dev_attr_sess_boot_target.attr)
4182 param = ISCSI_PARAM_BOOT_TARGET;
4183 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4184 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4185 else if (attr == &dev_attr_sess_discovery_session.attr)
4186 param = ISCSI_PARAM_DISCOVERY_SESS;
4187 else if (attr == &dev_attr_sess_portal_type.attr)
4188 param = ISCSI_PARAM_PORTAL_TYPE;
4189 else if (attr == &dev_attr_sess_chap_auth.attr)
4190 param = ISCSI_PARAM_CHAP_AUTH_EN;
4191 else if (attr == &dev_attr_sess_discovery_logout.attr)
4192 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4193 else if (attr == &dev_attr_sess_bidi_chap.attr)
4194 param = ISCSI_PARAM_BIDI_CHAP_EN;
4195 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4196 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4197 else if (attr == &dev_attr_sess_def_time2wait.attr)
4198 param = ISCSI_PARAM_DEF_TIME2WAIT;
4199 else if (attr == &dev_attr_sess_def_time2retain.attr)
4200 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4201 else if (attr == &dev_attr_sess_isid.attr)
4202 param = ISCSI_PARAM_ISID;
4203 else if (attr == &dev_attr_sess_tsid.attr)
4204 param = ISCSI_PARAM_TSID;
4205 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4206 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4207 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4208 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4209 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4210 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4211 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4212 return S_IRUGO | S_IWUSR;
4213 else if (attr == &dev_attr_priv_sess_state.attr)
4214 return S_IRUGO;
4215 else if (attr == &dev_attr_priv_sess_creator.attr)
4216 return S_IRUGO;
4217 else if (attr == &dev_attr_priv_sess_target_id.attr)
4218 return S_IRUGO;
4219 else {
4220 WARN_ONCE(1, "Invalid session attr");
4221 return 0;
4222 }
4223
4224 return t->attr_is_visible(ISCSI_PARAM, param);
4225 }
4226
4227 static struct attribute_group iscsi_session_group = {
4228 .attrs = iscsi_session_attrs,
4229 .is_visible = iscsi_session_attr_is_visible,
4230 };
4231
4232 /*
4233 * iSCSI host attrs
4234 */
4235 #define iscsi_host_attr_show(param) \
4236 static ssize_t \
4237 show_host_param_##param(struct device *dev, \
4238 struct device_attribute *attr, char *buf) \
4239 { \
4240 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4241 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4242 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4243 }
4244
4245 #define iscsi_host_attr(field, param) \
4246 iscsi_host_attr_show(param) \
4247 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4248 NULL);
4249
4250 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4251 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4252 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4253 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4254 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4255 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4256
4257 static struct attribute *iscsi_host_attrs[] = {
4258 &dev_attr_host_netdev.attr,
4259 &dev_attr_host_hwaddress.attr,
4260 &dev_attr_host_ipaddress.attr,
4261 &dev_attr_host_initiatorname.attr,
4262 &dev_attr_host_port_state.attr,
4263 &dev_attr_host_port_speed.attr,
4264 NULL,
4265 };
4266
4267 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4268 struct attribute *attr, int i)
4269 {
4270 struct device *cdev = container_of(kobj, struct device, kobj);
4271 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4272 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4273 int param;
4274
4275 if (attr == &dev_attr_host_netdev.attr)
4276 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4277 else if (attr == &dev_attr_host_hwaddress.attr)
4278 param = ISCSI_HOST_PARAM_HWADDRESS;
4279 else if (attr == &dev_attr_host_ipaddress.attr)
4280 param = ISCSI_HOST_PARAM_IPADDRESS;
4281 else if (attr == &dev_attr_host_initiatorname.attr)
4282 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4283 else if (attr == &dev_attr_host_port_state.attr)
4284 param = ISCSI_HOST_PARAM_PORT_STATE;
4285 else if (attr == &dev_attr_host_port_speed.attr)
4286 param = ISCSI_HOST_PARAM_PORT_SPEED;
4287 else {
4288 WARN_ONCE(1, "Invalid host attr");
4289 return 0;
4290 }
4291
4292 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4293 }
4294
4295 static struct attribute_group iscsi_host_group = {
4296 .attrs = iscsi_host_attrs,
4297 .is_visible = iscsi_host_attr_is_visible,
4298 };
4299
4300 /* convert iscsi_port_speed values to ascii string name */
4301 static const struct {
4302 enum iscsi_port_speed value;
4303 char *name;
4304 } iscsi_port_speed_names[] = {
4305 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4306 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4307 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4308 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4309 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4310 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4311 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4312 };
4313
4314 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4315 {
4316 int i;
4317 char *speed = "Unknown!";
4318 struct iscsi_cls_host *ihost = shost->shost_data;
4319 uint32_t port_speed = ihost->port_speed;
4320
4321 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4322 if (iscsi_port_speed_names[i].value & port_speed) {
4323 speed = iscsi_port_speed_names[i].name;
4324 break;
4325 }
4326 }
4327 return speed;
4328 }
4329 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4330
4331 /* convert iscsi_port_state values to ascii string name */
4332 static const struct {
4333 enum iscsi_port_state value;
4334 char *name;
4335 } iscsi_port_state_names[] = {
4336 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4337 {ISCSI_PORT_STATE_UP, "LINK UP" },
4338 };
4339
4340 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4341 {
4342 int i;
4343 char *state = "Unknown!";
4344 struct iscsi_cls_host *ihost = shost->shost_data;
4345 uint32_t port_state = ihost->port_state;
4346
4347 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4348 if (iscsi_port_state_names[i].value & port_state) {
4349 state = iscsi_port_state_names[i].name;
4350 break;
4351 }
4352 }
4353 return state;
4354 }
4355 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4356
4357 static int iscsi_session_match(struct attribute_container *cont,
4358 struct device *dev)
4359 {
4360 struct iscsi_cls_session *session;
4361 struct Scsi_Host *shost;
4362 struct iscsi_internal *priv;
4363
4364 if (!iscsi_is_session_dev(dev))
4365 return 0;
4366
4367 session = iscsi_dev_to_session(dev);
4368 shost = iscsi_session_to_shost(session);
4369 if (!shost->transportt)
4370 return 0;
4371
4372 priv = to_iscsi_internal(shost->transportt);
4373 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4374 return 0;
4375
4376 return &priv->session_cont.ac == cont;
4377 }
4378
4379 static int iscsi_conn_match(struct attribute_container *cont,
4380 struct device *dev)
4381 {
4382 struct iscsi_cls_session *session;
4383 struct iscsi_cls_conn *conn;
4384 struct Scsi_Host *shost;
4385 struct iscsi_internal *priv;
4386
4387 if (!iscsi_is_conn_dev(dev))
4388 return 0;
4389
4390 conn = iscsi_dev_to_conn(dev);
4391 session = iscsi_dev_to_session(conn->dev.parent);
4392 shost = iscsi_session_to_shost(session);
4393
4394 if (!shost->transportt)
4395 return 0;
4396
4397 priv = to_iscsi_internal(shost->transportt);
4398 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4399 return 0;
4400
4401 return &priv->conn_cont.ac == cont;
4402 }
4403
4404 static int iscsi_host_match(struct attribute_container *cont,
4405 struct device *dev)
4406 {
4407 struct Scsi_Host *shost;
4408 struct iscsi_internal *priv;
4409
4410 if (!scsi_is_host_device(dev))
4411 return 0;
4412
4413 shost = dev_to_shost(dev);
4414 if (!shost->transportt ||
4415 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4416 return 0;
4417
4418 priv = to_iscsi_internal(shost->transportt);
4419 return &priv->t.host_attrs.ac == cont;
4420 }
4421
4422 struct scsi_transport_template *
4423 iscsi_register_transport(struct iscsi_transport *tt)
4424 {
4425 struct iscsi_internal *priv;
4426 unsigned long flags;
4427 int err;
4428
4429 BUG_ON(!tt);
4430
4431 priv = iscsi_if_transport_lookup(tt);
4432 if (priv)
4433 return NULL;
4434
4435 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4436 if (!priv)
4437 return NULL;
4438 INIT_LIST_HEAD(&priv->list);
4439 priv->iscsi_transport = tt;
4440 priv->t.user_scan = iscsi_user_scan;
4441 priv->t.create_work_queue = 1;
4442
4443 priv->dev.class = &iscsi_transport_class;
4444 dev_set_name(&priv->dev, "%s", tt->name);
4445 err = device_register(&priv->dev);
4446 if (err)
4447 goto free_priv;
4448
4449 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4450 if (err)
4451 goto unregister_dev;
4452
4453 /* host parameters */
4454 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4455 priv->t.host_attrs.ac.match = iscsi_host_match;
4456 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4457 priv->t.host_size = sizeof(struct iscsi_cls_host);
4458 transport_container_register(&priv->t.host_attrs);
4459
4460 /* connection parameters */
4461 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4462 priv->conn_cont.ac.match = iscsi_conn_match;
4463 priv->conn_cont.ac.grp = &iscsi_conn_group;
4464 transport_container_register(&priv->conn_cont);
4465
4466 /* session parameters */
4467 priv->session_cont.ac.class = &iscsi_session_class.class;
4468 priv->session_cont.ac.match = iscsi_session_match;
4469 priv->session_cont.ac.grp = &iscsi_session_group;
4470 transport_container_register(&priv->session_cont);
4471
4472 spin_lock_irqsave(&iscsi_transport_lock, flags);
4473 list_add(&priv->list, &iscsi_transports);
4474 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4475
4476 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4477 return &priv->t;
4478
4479 unregister_dev:
4480 device_unregister(&priv->dev);
4481 return NULL;
4482 free_priv:
4483 kfree(priv);
4484 return NULL;
4485 }
4486 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4487
4488 int iscsi_unregister_transport(struct iscsi_transport *tt)
4489 {
4490 struct iscsi_internal *priv;
4491 unsigned long flags;
4492
4493 BUG_ON(!tt);
4494
4495 mutex_lock(&rx_queue_mutex);
4496
4497 priv = iscsi_if_transport_lookup(tt);
4498 BUG_ON (!priv);
4499
4500 spin_lock_irqsave(&iscsi_transport_lock, flags);
4501 list_del(&priv->list);
4502 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4503
4504 transport_container_unregister(&priv->conn_cont);
4505 transport_container_unregister(&priv->session_cont);
4506 transport_container_unregister(&priv->t.host_attrs);
4507
4508 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4509 device_unregister(&priv->dev);
4510 mutex_unlock(&rx_queue_mutex);
4511
4512 return 0;
4513 }
4514 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4515
4516 static __init int iscsi_transport_init(void)
4517 {
4518 int err;
4519 struct netlink_kernel_cfg cfg = {
4520 .groups = 1,
4521 .input = iscsi_if_rx,
4522 };
4523 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4524 ISCSI_TRANSPORT_VERSION);
4525
4526 atomic_set(&iscsi_session_nr, 0);
4527
4528 err = class_register(&iscsi_transport_class);
4529 if (err)
4530 return err;
4531
4532 err = class_register(&iscsi_endpoint_class);
4533 if (err)
4534 goto unregister_transport_class;
4535
4536 err = class_register(&iscsi_iface_class);
4537 if (err)
4538 goto unregister_endpoint_class;
4539
4540 err = transport_class_register(&iscsi_host_class);
4541 if (err)
4542 goto unregister_iface_class;
4543
4544 err = transport_class_register(&iscsi_connection_class);
4545 if (err)
4546 goto unregister_host_class;
4547
4548 err = transport_class_register(&iscsi_session_class);
4549 if (err)
4550 goto unregister_conn_class;
4551
4552 err = bus_register(&iscsi_flashnode_bus);
4553 if (err)
4554 goto unregister_session_class;
4555
4556 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4557 if (!nls) {
4558 err = -ENOBUFS;
4559 goto unregister_flashnode_bus;
4560 }
4561
4562 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4563 if (!iscsi_eh_timer_workq) {
4564 err = -ENOMEM;
4565 goto release_nls;
4566 }
4567
4568 return 0;
4569
4570 release_nls:
4571 netlink_kernel_release(nls);
4572 unregister_flashnode_bus:
4573 bus_unregister(&iscsi_flashnode_bus);
4574 unregister_session_class:
4575 transport_class_unregister(&iscsi_session_class);
4576 unregister_conn_class:
4577 transport_class_unregister(&iscsi_connection_class);
4578 unregister_host_class:
4579 transport_class_unregister(&iscsi_host_class);
4580 unregister_iface_class:
4581 class_unregister(&iscsi_iface_class);
4582 unregister_endpoint_class:
4583 class_unregister(&iscsi_endpoint_class);
4584 unregister_transport_class:
4585 class_unregister(&iscsi_transport_class);
4586 return err;
4587 }
4588
4589 static void __exit iscsi_transport_exit(void)
4590 {
4591 destroy_workqueue(iscsi_eh_timer_workq);
4592 netlink_kernel_release(nls);
4593 bus_unregister(&iscsi_flashnode_bus);
4594 transport_class_unregister(&iscsi_connection_class);
4595 transport_class_unregister(&iscsi_session_class);
4596 transport_class_unregister(&iscsi_host_class);
4597 class_unregister(&iscsi_endpoint_class);
4598 class_unregister(&iscsi_iface_class);
4599 class_unregister(&iscsi_transport_class);
4600 }
4601
4602 module_init(iscsi_transport_init);
4603 module_exit(iscsi_transport_exit);
4604
4605 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4606 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4607 "Alex Aizman <itn780@yahoo.com>");
4608 MODULE_DESCRIPTION("iSCSI Transport Interface");
4609 MODULE_LICENSE("GPL");
4610 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4611 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux with added FPC-III support