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Merge tag 'drm/tegra/for-5.1-rc5' of git://anongit.freedesktop.org/tegra/linux into...
[thirdparty/kernel/stable.git] / drivers / scsi / scsi_transport_iscsi.c
1 /*
2 * iSCSI transport class definitions
3 *
4 * Copyright (C) IBM Corporation, 2004
5 * Copyright (C) Mike Christie, 2004 - 2005
6 * Copyright (C) Dmitry Yusupov, 2004 - 2005
7 * Copyright (C) Alex Aizman, 2004 - 2005
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23 #include <linux/module.h>
24 #include <linux/mutex.h>
25 #include <linux/slab.h>
26 #include <linux/bsg-lib.h>
27 #include <linux/idr.h>
28 #include <net/tcp.h>
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_iscsi.h>
34 #include <scsi/iscsi_if.h>
35 #include <scsi/scsi_cmnd.h>
36 #include <scsi/scsi_bsg_iscsi.h>
37
38 #define ISCSI_TRANSPORT_VERSION "2.0-870"
39
40 #define CREATE_TRACE_POINTS
41 #include <trace/events/iscsi.h>
42
43 /*
44 * Export tracepoint symbols to be used by other modules.
45 */
46 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);
47 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);
48 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);
49 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);
50 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);
51
52 static int dbg_session;
53 module_param_named(debug_session, dbg_session, int,
54 S_IRUGO | S_IWUSR);
55 MODULE_PARM_DESC(debug_session,
56 "Turn on debugging for sessions in scsi_transport_iscsi "
57 "module. Set to 1 to turn on, and zero to turn off. Default "
58 "is off.");
59
60 static int dbg_conn;
61 module_param_named(debug_conn, dbg_conn, int,
62 S_IRUGO | S_IWUSR);
63 MODULE_PARM_DESC(debug_conn,
64 "Turn on debugging for connections in scsi_transport_iscsi "
65 "module. Set to 1 to turn on, and zero to turn off. Default "
66 "is off.");
67
68 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
69 do { \
70 if (dbg_session) \
71 iscsi_cls_session_printk(KERN_INFO, _session, \
72 "%s: " dbg_fmt, \
73 __func__, ##arg); \
74 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \
75 &(_session)->dev, \
76 "%s " dbg_fmt, __func__, ##arg); \
77 } while (0);
78
79 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
80 do { \
81 if (dbg_conn) \
82 iscsi_cls_conn_printk(KERN_INFO, _conn, \
83 "%s: " dbg_fmt, \
84 __func__, ##arg); \
85 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \
86 &(_conn)->dev, \
87 "%s " dbg_fmt, __func__, ##arg); \
88 } while (0);
89
90 struct iscsi_internal {
91 struct scsi_transport_template t;
92 struct iscsi_transport *iscsi_transport;
93 struct list_head list;
94 struct device dev;
95
96 struct transport_container conn_cont;
97 struct transport_container session_cont;
98 };
99
100 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
101 static struct workqueue_struct *iscsi_eh_timer_workq;
102
103 static DEFINE_IDA(iscsi_sess_ida);
104 /*
105 * list of registered transports and lock that must
106 * be held while accessing list. The iscsi_transport_lock must
107 * be acquired after the rx_queue_mutex.
108 */
109 static LIST_HEAD(iscsi_transports);
110 static DEFINE_SPINLOCK(iscsi_transport_lock);
111
112 #define to_iscsi_internal(tmpl) \
113 container_of(tmpl, struct iscsi_internal, t)
114
115 #define dev_to_iscsi_internal(_dev) \
116 container_of(_dev, struct iscsi_internal, dev)
117
118 static void iscsi_transport_release(struct device *dev)
119 {
120 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
121 kfree(priv);
122 }
123
124 /*
125 * iscsi_transport_class represents the iscsi_transports that are
126 * registered.
127 */
128 static struct class iscsi_transport_class = {
129 .name = "iscsi_transport",
130 .dev_release = iscsi_transport_release,
131 };
132
133 static ssize_t
134 show_transport_handle(struct device *dev, struct device_attribute *attr,
135 char *buf)
136 {
137 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
138 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
139 }
140 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
141
142 #define show_transport_attr(name, format) \
143 static ssize_t \
144 show_transport_##name(struct device *dev, \
145 struct device_attribute *attr,char *buf) \
146 { \
147 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
148 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
149 } \
150 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
151
152 show_transport_attr(caps, "0x%x");
153
154 static struct attribute *iscsi_transport_attrs[] = {
155 &dev_attr_handle.attr,
156 &dev_attr_caps.attr,
157 NULL,
158 };
159
160 static struct attribute_group iscsi_transport_group = {
161 .attrs = iscsi_transport_attrs,
162 };
163
164 /*
165 * iSCSI endpoint attrs
166 */
167 #define iscsi_dev_to_endpoint(_dev) \
168 container_of(_dev, struct iscsi_endpoint, dev)
169
170 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
171 struct device_attribute dev_attr_##_prefix##_##_name = \
172 __ATTR(_name,_mode,_show,_store)
173
174 static void iscsi_endpoint_release(struct device *dev)
175 {
176 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
177 kfree(ep);
178 }
179
180 static struct class iscsi_endpoint_class = {
181 .name = "iscsi_endpoint",
182 .dev_release = iscsi_endpoint_release,
183 };
184
185 static ssize_t
186 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
187 {
188 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
189 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
190 }
191 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
192
193 static struct attribute *iscsi_endpoint_attrs[] = {
194 &dev_attr_ep_handle.attr,
195 NULL,
196 };
197
198 static struct attribute_group iscsi_endpoint_group = {
199 .attrs = iscsi_endpoint_attrs,
200 };
201
202 #define ISCSI_MAX_EPID -1
203
204 static int iscsi_match_epid(struct device *dev, const void *data)
205 {
206 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
207 const uint64_t *epid = data;
208
209 return *epid == ep->id;
210 }
211
212 struct iscsi_endpoint *
213 iscsi_create_endpoint(int dd_size)
214 {
215 struct device *dev;
216 struct iscsi_endpoint *ep;
217 uint64_t id;
218 int err;
219
220 for (id = 1; id < ISCSI_MAX_EPID; id++) {
221 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
222 iscsi_match_epid);
223 if (!dev)
224 break;
225 else
226 put_device(dev);
227 }
228 if (id == ISCSI_MAX_EPID) {
229 printk(KERN_ERR "Too many connections. Max supported %u\n",
230 ISCSI_MAX_EPID - 1);
231 return NULL;
232 }
233
234 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
235 if (!ep)
236 return NULL;
237
238 ep->id = id;
239 ep->dev.class = &iscsi_endpoint_class;
240 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
241 err = device_register(&ep->dev);
242 if (err)
243 goto free_ep;
244
245 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
246 if (err)
247 goto unregister_dev;
248
249 if (dd_size)
250 ep->dd_data = &ep[1];
251 return ep;
252
253 unregister_dev:
254 device_unregister(&ep->dev);
255 return NULL;
256
257 free_ep:
258 kfree(ep);
259 return NULL;
260 }
261 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
262
263 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
264 {
265 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
266 device_unregister(&ep->dev);
267 }
268 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
269
270 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
271 {
272 struct iscsi_endpoint *ep;
273 struct device *dev;
274
275 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
276 iscsi_match_epid);
277 if (!dev)
278 return NULL;
279
280 ep = iscsi_dev_to_endpoint(dev);
281 /*
282 * we can drop this now because the interface will prevent
283 * removals and lookups from racing.
284 */
285 put_device(dev);
286 return ep;
287 }
288 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
289
290 /*
291 * Interface to display network param to sysfs
292 */
293
294 static void iscsi_iface_release(struct device *dev)
295 {
296 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
297 struct device *parent = iface->dev.parent;
298
299 kfree(iface);
300 put_device(parent);
301 }
302
303
304 static struct class iscsi_iface_class = {
305 .name = "iscsi_iface",
306 .dev_release = iscsi_iface_release,
307 };
308
309 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
310 struct device_attribute dev_attr_##_prefix##_##_name = \
311 __ATTR(_name, _mode, _show, _store)
312
313 /* iface attrs show */
314 #define iscsi_iface_attr_show(type, name, param_type, param) \
315 static ssize_t \
316 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
317 char *buf) \
318 { \
319 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
320 struct iscsi_transport *t = iface->transport; \
321 return t->get_iface_param(iface, param_type, param, buf); \
322 } \
323
324 #define iscsi_iface_net_attr(type, name, param) \
325 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
326 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
327
328 #define iscsi_iface_attr(type, name, param) \
329 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
330 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
331
332 /* generic read only ipv4 attribute */
333 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
334 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
335 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
336 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
337 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
338 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
339 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
340 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
341 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
342 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
343 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
344 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
345 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
346 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
347 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
348 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
349 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
350 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
351 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
352 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
353 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
354 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
355 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
356 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
357 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
358 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
359 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
360 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
361 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
362
363 /* generic read only ipv6 attribute */
364 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
365 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
366 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
367 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
368 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
369 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
370 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
371 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
372 iscsi_iface_net_attr(ipv6_iface, link_local_state,
373 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
374 iscsi_iface_net_attr(ipv6_iface, router_state,
375 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
376 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
377 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
378 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
379 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
380 iscsi_iface_net_attr(ipv6_iface, traffic_class,
381 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
382 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
383 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
384 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
385 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
386 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
387 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
388 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
389 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
390 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
391 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
392 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
393
394 /* common read only iface attribute */
395 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
396 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
397 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
398 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
399 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
400 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
401 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
402 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
403 iscsi_iface_net_attr(iface, tcp_nagle_disable,
404 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
405 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
406 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
407 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
408 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
409 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
410 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
411
412 /* common iscsi specific settings attributes */
413 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
414 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
415 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
416 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
417 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
418 iscsi_iface_attr(iface, data_seq_in_order,
419 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
420 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
421 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
422 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
423 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
424 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
425 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
426 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
427 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
428 iscsi_iface_attr(iface, discovery_auth_optional,
429 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
430 iscsi_iface_attr(iface, discovery_logout,
431 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
432 iscsi_iface_attr(iface, strict_login_comp_en,
433 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
434 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
435
436 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
437 struct attribute *attr, int i)
438 {
439 struct device *dev = container_of(kobj, struct device, kobj);
440 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
441 struct iscsi_transport *t = iface->transport;
442 int param;
443 int param_type;
444
445 if (attr == &dev_attr_iface_enabled.attr)
446 param = ISCSI_NET_PARAM_IFACE_ENABLE;
447 else if (attr == &dev_attr_iface_vlan_id.attr)
448 param = ISCSI_NET_PARAM_VLAN_ID;
449 else if (attr == &dev_attr_iface_vlan_priority.attr)
450 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
451 else if (attr == &dev_attr_iface_vlan_enabled.attr)
452 param = ISCSI_NET_PARAM_VLAN_ENABLED;
453 else if (attr == &dev_attr_iface_mtu.attr)
454 param = ISCSI_NET_PARAM_MTU;
455 else if (attr == &dev_attr_iface_port.attr)
456 param = ISCSI_NET_PARAM_PORT;
457 else if (attr == &dev_attr_iface_ipaddress_state.attr)
458 param = ISCSI_NET_PARAM_IPADDR_STATE;
459 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
460 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
461 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
462 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
463 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
464 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
465 else if (attr == &dev_attr_iface_tcp_wsf.attr)
466 param = ISCSI_NET_PARAM_TCP_WSF;
467 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
468 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
469 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
470 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
471 else if (attr == &dev_attr_iface_cache_id.attr)
472 param = ISCSI_NET_PARAM_CACHE_ID;
473 else if (attr == &dev_attr_iface_redirect_en.attr)
474 param = ISCSI_NET_PARAM_REDIRECT_EN;
475 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
476 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
477 else if (attr == &dev_attr_iface_header_digest.attr)
478 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
479 else if (attr == &dev_attr_iface_data_digest.attr)
480 param = ISCSI_IFACE_PARAM_DATADGST_EN;
481 else if (attr == &dev_attr_iface_immediate_data.attr)
482 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
483 else if (attr == &dev_attr_iface_initial_r2t.attr)
484 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
485 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
486 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
487 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
488 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
489 else if (attr == &dev_attr_iface_erl.attr)
490 param = ISCSI_IFACE_PARAM_ERL;
491 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
492 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
493 else if (attr == &dev_attr_iface_first_burst_len.attr)
494 param = ISCSI_IFACE_PARAM_FIRST_BURST;
495 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
496 param = ISCSI_IFACE_PARAM_MAX_R2T;
497 else if (attr == &dev_attr_iface_max_burst_len.attr)
498 param = ISCSI_IFACE_PARAM_MAX_BURST;
499 else if (attr == &dev_attr_iface_chap_auth.attr)
500 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
501 else if (attr == &dev_attr_iface_bidi_chap.attr)
502 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
503 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
504 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
505 else if (attr == &dev_attr_iface_discovery_logout.attr)
506 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
507 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
508 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
509 else if (attr == &dev_attr_iface_initiator_name.attr)
510 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
511 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
512 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
513 param = ISCSI_NET_PARAM_IPV4_ADDR;
514 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
515 param = ISCSI_NET_PARAM_IPV4_GW;
516 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
517 param = ISCSI_NET_PARAM_IPV4_SUBNET;
518 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
519 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
520 else if (attr ==
521 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
522 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
523 else if (attr ==
524 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
525 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
526 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
527 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
528 else if (attr == &dev_attr_ipv4_iface_tos.attr)
529 param = ISCSI_NET_PARAM_IPV4_TOS;
530 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
531 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
532 else if (attr ==
533 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
534 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
535 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
536 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
537 else if (attr ==
538 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
539 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
540 else if (attr ==
541 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
542 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
543 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
544 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
545 else if (attr ==
546 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
547 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
548 else if (attr ==
549 &dev_attr_ipv4_iface_fragment_disable.attr)
550 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
551 else if (attr ==
552 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
553 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
554 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
555 param = ISCSI_NET_PARAM_IPV4_TTL;
556 else
557 return 0;
558 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
559 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
560 param = ISCSI_NET_PARAM_IPV6_ADDR;
561 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
562 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
563 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
564 param = ISCSI_NET_PARAM_IPV6_ROUTER;
565 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
566 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
567 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
568 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
569 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
570 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
571 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
572 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
573 else if (attr ==
574 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
575 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
576 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
577 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
578 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
579 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
580 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
581 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
582 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
583 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
584 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
585 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
586 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
587 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
588 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
589 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
590 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
591 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
592 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
593 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
594 else
595 return 0;
596 } else {
597 WARN_ONCE(1, "Invalid iface attr");
598 return 0;
599 }
600
601 switch (param) {
602 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
603 case ISCSI_IFACE_PARAM_HDRDGST_EN:
604 case ISCSI_IFACE_PARAM_DATADGST_EN:
605 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
606 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
607 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
608 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
609 case ISCSI_IFACE_PARAM_ERL:
610 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
611 case ISCSI_IFACE_PARAM_FIRST_BURST:
612 case ISCSI_IFACE_PARAM_MAX_R2T:
613 case ISCSI_IFACE_PARAM_MAX_BURST:
614 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
615 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
616 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
617 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
618 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
619 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
620 param_type = ISCSI_IFACE_PARAM;
621 break;
622 default:
623 param_type = ISCSI_NET_PARAM;
624 }
625
626 return t->attr_is_visible(param_type, param);
627 }
628
629 static struct attribute *iscsi_iface_attrs[] = {
630 &dev_attr_iface_enabled.attr,
631 &dev_attr_iface_vlan_id.attr,
632 &dev_attr_iface_vlan_priority.attr,
633 &dev_attr_iface_vlan_enabled.attr,
634 &dev_attr_ipv4_iface_ipaddress.attr,
635 &dev_attr_ipv4_iface_gateway.attr,
636 &dev_attr_ipv4_iface_subnet.attr,
637 &dev_attr_ipv4_iface_bootproto.attr,
638 &dev_attr_ipv6_iface_ipaddress.attr,
639 &dev_attr_ipv6_iface_link_local_addr.attr,
640 &dev_attr_ipv6_iface_router_addr.attr,
641 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
642 &dev_attr_ipv6_iface_link_local_autocfg.attr,
643 &dev_attr_iface_mtu.attr,
644 &dev_attr_iface_port.attr,
645 &dev_attr_iface_ipaddress_state.attr,
646 &dev_attr_iface_delayed_ack_en.attr,
647 &dev_attr_iface_tcp_nagle_disable.attr,
648 &dev_attr_iface_tcp_wsf_disable.attr,
649 &dev_attr_iface_tcp_wsf.attr,
650 &dev_attr_iface_tcp_timer_scale.attr,
651 &dev_attr_iface_tcp_timestamp_en.attr,
652 &dev_attr_iface_cache_id.attr,
653 &dev_attr_iface_redirect_en.attr,
654 &dev_attr_iface_def_taskmgmt_tmo.attr,
655 &dev_attr_iface_header_digest.attr,
656 &dev_attr_iface_data_digest.attr,
657 &dev_attr_iface_immediate_data.attr,
658 &dev_attr_iface_initial_r2t.attr,
659 &dev_attr_iface_data_seq_in_order.attr,
660 &dev_attr_iface_data_pdu_in_order.attr,
661 &dev_attr_iface_erl.attr,
662 &dev_attr_iface_max_recv_dlength.attr,
663 &dev_attr_iface_first_burst_len.attr,
664 &dev_attr_iface_max_outstanding_r2t.attr,
665 &dev_attr_iface_max_burst_len.attr,
666 &dev_attr_iface_chap_auth.attr,
667 &dev_attr_iface_bidi_chap.attr,
668 &dev_attr_iface_discovery_auth_optional.attr,
669 &dev_attr_iface_discovery_logout.attr,
670 &dev_attr_iface_strict_login_comp_en.attr,
671 &dev_attr_iface_initiator_name.attr,
672 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
673 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
674 &dev_attr_ipv4_iface_tos_en.attr,
675 &dev_attr_ipv4_iface_tos.attr,
676 &dev_attr_ipv4_iface_grat_arp_en.attr,
677 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
678 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
679 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
680 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
681 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
682 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
683 &dev_attr_ipv4_iface_fragment_disable.attr,
684 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
685 &dev_attr_ipv4_iface_ttl.attr,
686 &dev_attr_ipv6_iface_link_local_state.attr,
687 &dev_attr_ipv6_iface_router_state.attr,
688 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
689 &dev_attr_ipv6_iface_mld_en.attr,
690 &dev_attr_ipv6_iface_flow_label.attr,
691 &dev_attr_ipv6_iface_traffic_class.attr,
692 &dev_attr_ipv6_iface_hop_limit.attr,
693 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
694 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
695 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
696 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
697 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
698 NULL,
699 };
700
701 static struct attribute_group iscsi_iface_group = {
702 .attrs = iscsi_iface_attrs,
703 .is_visible = iscsi_iface_attr_is_visible,
704 };
705
706 /* convert iscsi_ipaddress_state values to ascii string name */
707 static const struct {
708 enum iscsi_ipaddress_state value;
709 char *name;
710 } iscsi_ipaddress_state_names[] = {
711 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
712 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
713 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
714 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
715 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
716 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
717 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
718 };
719
720 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
721 {
722 int i;
723 char *state = NULL;
724
725 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
726 if (iscsi_ipaddress_state_names[i].value == port_state) {
727 state = iscsi_ipaddress_state_names[i].name;
728 break;
729 }
730 }
731 return state;
732 }
733 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
734
735 /* convert iscsi_router_state values to ascii string name */
736 static const struct {
737 enum iscsi_router_state value;
738 char *name;
739 } iscsi_router_state_names[] = {
740 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
741 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
742 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
743 {ISCSI_ROUTER_STATE_STALE, "Stale" },
744 };
745
746 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
747 {
748 int i;
749 char *state = NULL;
750
751 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
752 if (iscsi_router_state_names[i].value == router_state) {
753 state = iscsi_router_state_names[i].name;
754 break;
755 }
756 }
757 return state;
758 }
759 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
760
761 struct iscsi_iface *
762 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
763 uint32_t iface_type, uint32_t iface_num, int dd_size)
764 {
765 struct iscsi_iface *iface;
766 int err;
767
768 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
769 if (!iface)
770 return NULL;
771
772 iface->transport = transport;
773 iface->iface_type = iface_type;
774 iface->iface_num = iface_num;
775 iface->dev.release = iscsi_iface_release;
776 iface->dev.class = &iscsi_iface_class;
777 /* parent reference released in iscsi_iface_release */
778 iface->dev.parent = get_device(&shost->shost_gendev);
779 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
780 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
781 iface_num);
782 else
783 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
784 iface_num);
785
786 err = device_register(&iface->dev);
787 if (err)
788 goto free_iface;
789
790 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
791 if (err)
792 goto unreg_iface;
793
794 if (dd_size)
795 iface->dd_data = &iface[1];
796 return iface;
797
798 unreg_iface:
799 device_unregister(&iface->dev);
800 return NULL;
801
802 free_iface:
803 put_device(iface->dev.parent);
804 kfree(iface);
805 return NULL;
806 }
807 EXPORT_SYMBOL_GPL(iscsi_create_iface);
808
809 void iscsi_destroy_iface(struct iscsi_iface *iface)
810 {
811 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
812 device_unregister(&iface->dev);
813 }
814 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
815
816 /*
817 * Interface to display flash node params to sysfs
818 */
819
820 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
821 struct device_attribute dev_attr_##_prefix##_##_name = \
822 __ATTR(_name, _mode, _show, _store)
823
824 /* flash node session attrs show */
825 #define iscsi_flashnode_sess_attr_show(type, name, param) \
826 static ssize_t \
827 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
828 char *buf) \
829 { \
830 struct iscsi_bus_flash_session *fnode_sess = \
831 iscsi_dev_to_flash_session(dev);\
832 struct iscsi_transport *t = fnode_sess->transport; \
833 return t->get_flashnode_param(fnode_sess, param, buf); \
834 } \
835
836
837 #define iscsi_flashnode_sess_attr(type, name, param) \
838 iscsi_flashnode_sess_attr_show(type, name, param) \
839 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
840 show_##type##_##name, NULL);
841
842 /* Flash node session attributes */
843
844 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
845 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
846 iscsi_flashnode_sess_attr(fnode, discovery_session,
847 ISCSI_FLASHNODE_DISCOVERY_SESS);
848 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
849 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
850 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
851 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
852 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
853 ISCSI_FLASHNODE_DATASEQ_INORDER);
854 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
855 ISCSI_FLASHNODE_PDU_INORDER);
856 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
857 iscsi_flashnode_sess_attr(fnode, discovery_logout,
858 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
859 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
860 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
861 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
862 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
863 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
864 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
865 iscsi_flashnode_sess_attr(fnode, def_time2retain,
866 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
867 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
868 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
869 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
870 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
871 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
872 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
873 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
874 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
875 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
876 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
877 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
878 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
879 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
880 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
881 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
882 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
883 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
884 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
885 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
886 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
887
888 static struct attribute *iscsi_flashnode_sess_attrs[] = {
889 &dev_attr_fnode_auto_snd_tgt_disable.attr,
890 &dev_attr_fnode_discovery_session.attr,
891 &dev_attr_fnode_portal_type.attr,
892 &dev_attr_fnode_entry_enable.attr,
893 &dev_attr_fnode_immediate_data.attr,
894 &dev_attr_fnode_initial_r2t.attr,
895 &dev_attr_fnode_data_seq_in_order.attr,
896 &dev_attr_fnode_data_pdu_in_order.attr,
897 &dev_attr_fnode_chap_auth.attr,
898 &dev_attr_fnode_discovery_logout.attr,
899 &dev_attr_fnode_bidi_chap.attr,
900 &dev_attr_fnode_discovery_auth_optional.attr,
901 &dev_attr_fnode_erl.attr,
902 &dev_attr_fnode_first_burst_len.attr,
903 &dev_attr_fnode_def_time2wait.attr,
904 &dev_attr_fnode_def_time2retain.attr,
905 &dev_attr_fnode_max_outstanding_r2t.attr,
906 &dev_attr_fnode_isid.attr,
907 &dev_attr_fnode_tsid.attr,
908 &dev_attr_fnode_max_burst_len.attr,
909 &dev_attr_fnode_def_taskmgmt_tmo.attr,
910 &dev_attr_fnode_targetalias.attr,
911 &dev_attr_fnode_targetname.attr,
912 &dev_attr_fnode_tpgt.attr,
913 &dev_attr_fnode_discovery_parent_idx.attr,
914 &dev_attr_fnode_discovery_parent_type.attr,
915 &dev_attr_fnode_chap_in_idx.attr,
916 &dev_attr_fnode_chap_out_idx.attr,
917 &dev_attr_fnode_username.attr,
918 &dev_attr_fnode_username_in.attr,
919 &dev_attr_fnode_password.attr,
920 &dev_attr_fnode_password_in.attr,
921 &dev_attr_fnode_is_boot_target.attr,
922 NULL,
923 };
924
925 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
926 struct attribute *attr,
927 int i)
928 {
929 struct device *dev = container_of(kobj, struct device, kobj);
930 struct iscsi_bus_flash_session *fnode_sess =
931 iscsi_dev_to_flash_session(dev);
932 struct iscsi_transport *t = fnode_sess->transport;
933 int param;
934
935 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
936 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
937 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
938 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
939 } else if (attr == &dev_attr_fnode_portal_type.attr) {
940 param = ISCSI_FLASHNODE_PORTAL_TYPE;
941 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
942 param = ISCSI_FLASHNODE_ENTRY_EN;
943 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
944 param = ISCSI_FLASHNODE_IMM_DATA_EN;
945 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
946 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
947 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
948 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
949 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
950 param = ISCSI_FLASHNODE_PDU_INORDER;
951 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
952 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
953 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
954 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
955 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
956 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
957 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
958 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
959 } else if (attr == &dev_attr_fnode_erl.attr) {
960 param = ISCSI_FLASHNODE_ERL;
961 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
962 param = ISCSI_FLASHNODE_FIRST_BURST;
963 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
964 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
965 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
966 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
967 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
968 param = ISCSI_FLASHNODE_MAX_R2T;
969 } else if (attr == &dev_attr_fnode_isid.attr) {
970 param = ISCSI_FLASHNODE_ISID;
971 } else if (attr == &dev_attr_fnode_tsid.attr) {
972 param = ISCSI_FLASHNODE_TSID;
973 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
974 param = ISCSI_FLASHNODE_MAX_BURST;
975 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
976 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
977 } else if (attr == &dev_attr_fnode_targetalias.attr) {
978 param = ISCSI_FLASHNODE_ALIAS;
979 } else if (attr == &dev_attr_fnode_targetname.attr) {
980 param = ISCSI_FLASHNODE_NAME;
981 } else if (attr == &dev_attr_fnode_tpgt.attr) {
982 param = ISCSI_FLASHNODE_TPGT;
983 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
984 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
985 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
986 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
987 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
988 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
989 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
990 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
991 } else if (attr == &dev_attr_fnode_username.attr) {
992 param = ISCSI_FLASHNODE_USERNAME;
993 } else if (attr == &dev_attr_fnode_username_in.attr) {
994 param = ISCSI_FLASHNODE_USERNAME_IN;
995 } else if (attr == &dev_attr_fnode_password.attr) {
996 param = ISCSI_FLASHNODE_PASSWORD;
997 } else if (attr == &dev_attr_fnode_password_in.attr) {
998 param = ISCSI_FLASHNODE_PASSWORD_IN;
999 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
1000 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
1001 } else {
1002 WARN_ONCE(1, "Invalid flashnode session attr");
1003 return 0;
1004 }
1005
1006 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1007 }
1008
1009 static struct attribute_group iscsi_flashnode_sess_attr_group = {
1010 .attrs = iscsi_flashnode_sess_attrs,
1011 .is_visible = iscsi_flashnode_sess_attr_is_visible,
1012 };
1013
1014 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1015 &iscsi_flashnode_sess_attr_group,
1016 NULL,
1017 };
1018
1019 static void iscsi_flashnode_sess_release(struct device *dev)
1020 {
1021 struct iscsi_bus_flash_session *fnode_sess =
1022 iscsi_dev_to_flash_session(dev);
1023
1024 kfree(fnode_sess->targetname);
1025 kfree(fnode_sess->targetalias);
1026 kfree(fnode_sess->portal_type);
1027 kfree(fnode_sess);
1028 }
1029
1030 static const struct device_type iscsi_flashnode_sess_dev_type = {
1031 .name = "iscsi_flashnode_sess_dev_type",
1032 .groups = iscsi_flashnode_sess_attr_groups,
1033 .release = iscsi_flashnode_sess_release,
1034 };
1035
1036 /* flash node connection attrs show */
1037 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1038 static ssize_t \
1039 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1040 char *buf) \
1041 { \
1042 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1043 struct iscsi_bus_flash_session *fnode_sess = \
1044 iscsi_flash_conn_to_flash_session(fnode_conn);\
1045 struct iscsi_transport *t = fnode_conn->transport; \
1046 return t->get_flashnode_param(fnode_sess, param, buf); \
1047 } \
1048
1049
1050 #define iscsi_flashnode_conn_attr(type, name, param) \
1051 iscsi_flashnode_conn_attr_show(type, name, param) \
1052 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1053 show_##type##_##name, NULL);
1054
1055 /* Flash node connection attributes */
1056
1057 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1058 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1059 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1060 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1061 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1062 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1063 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1064 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1065 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1066 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1067 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1068 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1069 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1070 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1071 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1072 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1073 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1074 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1075 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1076 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1077 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1078 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1079 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1080 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1081 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1082 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1083 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1084 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1085 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1086 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1087 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1088 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1089 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1090 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1091 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1092 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1093 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1094 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1095 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1096
1097 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1098 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1099 &dev_attr_fnode_header_digest.attr,
1100 &dev_attr_fnode_data_digest.attr,
1101 &dev_attr_fnode_snack_req.attr,
1102 &dev_attr_fnode_tcp_timestamp_stat.attr,
1103 &dev_attr_fnode_tcp_nagle_disable.attr,
1104 &dev_attr_fnode_tcp_wsf_disable.attr,
1105 &dev_attr_fnode_tcp_timer_scale.attr,
1106 &dev_attr_fnode_tcp_timestamp_enable.attr,
1107 &dev_attr_fnode_fragment_disable.attr,
1108 &dev_attr_fnode_max_recv_dlength.attr,
1109 &dev_attr_fnode_max_xmit_dlength.attr,
1110 &dev_attr_fnode_keepalive_tmo.attr,
1111 &dev_attr_fnode_port.attr,
1112 &dev_attr_fnode_ipaddress.attr,
1113 &dev_attr_fnode_redirect_ipaddr.attr,
1114 &dev_attr_fnode_max_segment_size.attr,
1115 &dev_attr_fnode_local_port.attr,
1116 &dev_attr_fnode_ipv4_tos.attr,
1117 &dev_attr_fnode_ipv6_traffic_class.attr,
1118 &dev_attr_fnode_ipv6_flow_label.attr,
1119 &dev_attr_fnode_link_local_ipv6.attr,
1120 &dev_attr_fnode_tcp_xmit_wsf.attr,
1121 &dev_attr_fnode_tcp_recv_wsf.attr,
1122 &dev_attr_fnode_statsn.attr,
1123 &dev_attr_fnode_exp_statsn.attr,
1124 NULL,
1125 };
1126
1127 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1128 struct attribute *attr,
1129 int i)
1130 {
1131 struct device *dev = container_of(kobj, struct device, kobj);
1132 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1133 struct iscsi_transport *t = fnode_conn->transport;
1134 int param;
1135
1136 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1137 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1138 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1139 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1140 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1141 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1142 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1143 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1144 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1145 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1146 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1147 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1148 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1149 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1150 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1151 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1152 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1153 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1154 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1155 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1156 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1157 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1158 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1159 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1160 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1161 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1162 } else if (attr == &dev_attr_fnode_port.attr) {
1163 param = ISCSI_FLASHNODE_PORT;
1164 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1165 param = ISCSI_FLASHNODE_IPADDR;
1166 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1167 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1168 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1169 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1170 } else if (attr == &dev_attr_fnode_local_port.attr) {
1171 param = ISCSI_FLASHNODE_LOCAL_PORT;
1172 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1173 param = ISCSI_FLASHNODE_IPV4_TOS;
1174 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1175 param = ISCSI_FLASHNODE_IPV6_TC;
1176 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1177 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1178 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1179 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1180 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1181 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1182 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1183 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1184 } else if (attr == &dev_attr_fnode_statsn.attr) {
1185 param = ISCSI_FLASHNODE_STATSN;
1186 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1187 param = ISCSI_FLASHNODE_EXP_STATSN;
1188 } else {
1189 WARN_ONCE(1, "Invalid flashnode connection attr");
1190 return 0;
1191 }
1192
1193 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1194 }
1195
1196 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1197 .attrs = iscsi_flashnode_conn_attrs,
1198 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1199 };
1200
1201 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1202 &iscsi_flashnode_conn_attr_group,
1203 NULL,
1204 };
1205
1206 static void iscsi_flashnode_conn_release(struct device *dev)
1207 {
1208 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1209
1210 kfree(fnode_conn->ipaddress);
1211 kfree(fnode_conn->redirect_ipaddr);
1212 kfree(fnode_conn->link_local_ipv6_addr);
1213 kfree(fnode_conn);
1214 }
1215
1216 static const struct device_type iscsi_flashnode_conn_dev_type = {
1217 .name = "iscsi_flashnode_conn_dev_type",
1218 .groups = iscsi_flashnode_conn_attr_groups,
1219 .release = iscsi_flashnode_conn_release,
1220 };
1221
1222 static struct bus_type iscsi_flashnode_bus;
1223
1224 int iscsi_flashnode_bus_match(struct device *dev,
1225 struct device_driver *drv)
1226 {
1227 if (dev->bus == &iscsi_flashnode_bus)
1228 return 1;
1229 return 0;
1230 }
1231 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1232
1233 static struct bus_type iscsi_flashnode_bus = {
1234 .name = "iscsi_flashnode",
1235 .match = &iscsi_flashnode_bus_match,
1236 };
1237
1238 /**
1239 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1240 * @shost: pointer to host data
1241 * @index: index of flashnode to add in sysfs
1242 * @transport: pointer to transport data
1243 * @dd_size: total size to allocate
1244 *
1245 * Adds a sysfs entry for the flashnode session attributes
1246 *
1247 * Returns:
1248 * pointer to allocated flashnode sess on success
1249 * %NULL on failure
1250 */
1251 struct iscsi_bus_flash_session *
1252 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1253 struct iscsi_transport *transport,
1254 int dd_size)
1255 {
1256 struct iscsi_bus_flash_session *fnode_sess;
1257 int err;
1258
1259 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1260 if (!fnode_sess)
1261 return NULL;
1262
1263 fnode_sess->transport = transport;
1264 fnode_sess->target_id = index;
1265 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1266 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1267 fnode_sess->dev.parent = &shost->shost_gendev;
1268 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1269 shost->host_no, index);
1270
1271 err = device_register(&fnode_sess->dev);
1272 if (err)
1273 goto free_fnode_sess;
1274
1275 if (dd_size)
1276 fnode_sess->dd_data = &fnode_sess[1];
1277
1278 return fnode_sess;
1279
1280 free_fnode_sess:
1281 kfree(fnode_sess);
1282 return NULL;
1283 }
1284 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1285
1286 /**
1287 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1288 * @shost: pointer to host data
1289 * @fnode_sess: pointer to the parent flashnode session entry
1290 * @transport: pointer to transport data
1291 * @dd_size: total size to allocate
1292 *
1293 * Adds a sysfs entry for the flashnode connection attributes
1294 *
1295 * Returns:
1296 * pointer to allocated flashnode conn on success
1297 * %NULL on failure
1298 */
1299 struct iscsi_bus_flash_conn *
1300 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1301 struct iscsi_bus_flash_session *fnode_sess,
1302 struct iscsi_transport *transport,
1303 int dd_size)
1304 {
1305 struct iscsi_bus_flash_conn *fnode_conn;
1306 int err;
1307
1308 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1309 if (!fnode_conn)
1310 return NULL;
1311
1312 fnode_conn->transport = transport;
1313 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1314 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1315 fnode_conn->dev.parent = &fnode_sess->dev;
1316 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1317 shost->host_no, fnode_sess->target_id);
1318
1319 err = device_register(&fnode_conn->dev);
1320 if (err)
1321 goto free_fnode_conn;
1322
1323 if (dd_size)
1324 fnode_conn->dd_data = &fnode_conn[1];
1325
1326 return fnode_conn;
1327
1328 free_fnode_conn:
1329 kfree(fnode_conn);
1330 return NULL;
1331 }
1332 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1333
1334 /**
1335 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1336 * @dev: device to verify
1337 * @data: pointer to data containing value to use for verification
1338 *
1339 * Verifies if the passed device is flashnode conn device
1340 *
1341 * Returns:
1342 * 1 on success
1343 * 0 on failure
1344 */
1345 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1346 {
1347 return dev->bus == &iscsi_flashnode_bus;
1348 }
1349
1350 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1351 {
1352 device_unregister(&fnode_conn->dev);
1353 return 0;
1354 }
1355
1356 static int flashnode_match_index(struct device *dev, void *data)
1357 {
1358 struct iscsi_bus_flash_session *fnode_sess = NULL;
1359 int ret = 0;
1360
1361 if (!iscsi_flashnode_bus_match(dev, NULL))
1362 goto exit_match_index;
1363
1364 fnode_sess = iscsi_dev_to_flash_session(dev);
1365 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1366
1367 exit_match_index:
1368 return ret;
1369 }
1370
1371 /**
1372 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1373 * @shost: pointer to host data
1374 * @idx: index to match
1375 *
1376 * Finds the flashnode session object for the passed index
1377 *
1378 * Returns:
1379 * pointer to found flashnode session object on success
1380 * %NULL on failure
1381 */
1382 static struct iscsi_bus_flash_session *
1383 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1384 {
1385 struct iscsi_bus_flash_session *fnode_sess = NULL;
1386 struct device *dev;
1387
1388 dev = device_find_child(&shost->shost_gendev, &idx,
1389 flashnode_match_index);
1390 if (dev)
1391 fnode_sess = iscsi_dev_to_flash_session(dev);
1392
1393 return fnode_sess;
1394 }
1395
1396 /**
1397 * iscsi_find_flashnode_sess - finds flashnode session entry
1398 * @shost: pointer to host data
1399 * @data: pointer to data containing value to use for comparison
1400 * @fn: function pointer that does actual comparison
1401 *
1402 * Finds the flashnode session object comparing the data passed using logic
1403 * defined in passed function pointer
1404 *
1405 * Returns:
1406 * pointer to found flashnode session device object on success
1407 * %NULL on failure
1408 */
1409 struct device *
1410 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1411 int (*fn)(struct device *dev, void *data))
1412 {
1413 return device_find_child(&shost->shost_gendev, data, fn);
1414 }
1415 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1416
1417 /**
1418 * iscsi_find_flashnode_conn - finds flashnode connection entry
1419 * @fnode_sess: pointer to parent flashnode session entry
1420 *
1421 * Finds the flashnode connection object comparing the data passed using logic
1422 * defined in passed function pointer
1423 *
1424 * Returns:
1425 * pointer to found flashnode connection device object on success
1426 * %NULL on failure
1427 */
1428 struct device *
1429 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1430 {
1431 return device_find_child(&fnode_sess->dev, NULL,
1432 iscsi_is_flashnode_conn_dev);
1433 }
1434 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1435
1436 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1437 {
1438 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1439 return 0;
1440
1441 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1442 }
1443
1444 /**
1445 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1446 * @fnode_sess: pointer to flashnode session entry to be destroyed
1447 *
1448 * Deletes the flashnode session entry and all children flashnode connection
1449 * entries from sysfs
1450 */
1451 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1452 {
1453 int err;
1454
1455 err = device_for_each_child(&fnode_sess->dev, NULL,
1456 iscsi_iter_destroy_flashnode_conn_fn);
1457 if (err)
1458 pr_err("Could not delete all connections for %s. Error %d.\n",
1459 fnode_sess->dev.kobj.name, err);
1460
1461 device_unregister(&fnode_sess->dev);
1462 }
1463 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1464
1465 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1466 {
1467 if (!iscsi_flashnode_bus_match(dev, NULL))
1468 return 0;
1469
1470 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1471 return 0;
1472 }
1473
1474 /**
1475 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1476 * @shost: pointer to host data
1477 *
1478 * Destroys all the flashnode session entries and all corresponding children
1479 * flashnode connection entries from sysfs
1480 */
1481 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1482 {
1483 device_for_each_child(&shost->shost_gendev, NULL,
1484 iscsi_iter_destroy_flashnode_fn);
1485 }
1486 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1487
1488 /*
1489 * BSG support
1490 */
1491 /**
1492 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1493 * @job: bsg job to be processed
1494 */
1495 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1496 {
1497 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1498 struct iscsi_bsg_request *req = job->request;
1499 struct iscsi_bsg_reply *reply = job->reply;
1500 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1501 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1502 int ret;
1503
1504 /* check if we have the msgcode value at least */
1505 if (job->request_len < sizeof(uint32_t)) {
1506 ret = -ENOMSG;
1507 goto fail_host_msg;
1508 }
1509
1510 /* Validate the host command */
1511 switch (req->msgcode) {
1512 case ISCSI_BSG_HST_VENDOR:
1513 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1514 if ((shost->hostt->vendor_id == 0L) ||
1515 (req->rqst_data.h_vendor.vendor_id !=
1516 shost->hostt->vendor_id)) {
1517 ret = -ESRCH;
1518 goto fail_host_msg;
1519 }
1520 break;
1521 default:
1522 ret = -EBADR;
1523 goto fail_host_msg;
1524 }
1525
1526 /* check if we really have all the request data needed */
1527 if (job->request_len < cmdlen) {
1528 ret = -ENOMSG;
1529 goto fail_host_msg;
1530 }
1531
1532 ret = i->iscsi_transport->bsg_request(job);
1533 if (!ret)
1534 return 0;
1535
1536 fail_host_msg:
1537 /* return the errno failure code as the only status */
1538 BUG_ON(job->reply_len < sizeof(uint32_t));
1539 reply->reply_payload_rcv_len = 0;
1540 reply->result = ret;
1541 job->reply_len = sizeof(uint32_t);
1542 bsg_job_done(job, ret, 0);
1543 return 0;
1544 }
1545
1546 /**
1547 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1548 * @shost: shost for iscsi_host
1549 * @ihost: iscsi_cls_host adding the structures to
1550 */
1551 static int
1552 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1553 {
1554 struct device *dev = &shost->shost_gendev;
1555 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1556 struct request_queue *q;
1557 char bsg_name[20];
1558
1559 if (!i->iscsi_transport->bsg_request)
1560 return -ENOTSUPP;
1561
1562 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1563 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1564 if (IS_ERR(q)) {
1565 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1566 "initialize - no request queue\n");
1567 return PTR_ERR(q);
1568 }
1569 __scsi_init_queue(shost, q);
1570
1571 ihost->bsg_q = q;
1572 return 0;
1573 }
1574
1575 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1576 struct device *cdev)
1577 {
1578 struct Scsi_Host *shost = dev_to_shost(dev);
1579 struct iscsi_cls_host *ihost = shost->shost_data;
1580
1581 memset(ihost, 0, sizeof(*ihost));
1582 atomic_set(&ihost->nr_scans, 0);
1583 mutex_init(&ihost->mutex);
1584
1585 iscsi_bsg_host_add(shost, ihost);
1586 /* ignore any bsg add error - we just can't do sgio */
1587
1588 return 0;
1589 }
1590
1591 static int iscsi_remove_host(struct transport_container *tc,
1592 struct device *dev, struct device *cdev)
1593 {
1594 struct Scsi_Host *shost = dev_to_shost(dev);
1595 struct iscsi_cls_host *ihost = shost->shost_data;
1596
1597 bsg_remove_queue(ihost->bsg_q);
1598 return 0;
1599 }
1600
1601 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1602 "iscsi_host",
1603 iscsi_setup_host,
1604 iscsi_remove_host,
1605 NULL);
1606
1607 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1608 "iscsi_session",
1609 NULL,
1610 NULL,
1611 NULL);
1612
1613 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1614 "iscsi_connection",
1615 NULL,
1616 NULL,
1617 NULL);
1618
1619 static struct sock *nls;
1620 static DEFINE_MUTEX(rx_queue_mutex);
1621
1622 static LIST_HEAD(sesslist);
1623 static DEFINE_SPINLOCK(sesslock);
1624 static LIST_HEAD(connlist);
1625 static DEFINE_SPINLOCK(connlock);
1626
1627 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1628 {
1629 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1630 return sess->sid;
1631 }
1632
1633 /*
1634 * Returns the matching session to a given sid
1635 */
1636 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1637 {
1638 unsigned long flags;
1639 struct iscsi_cls_session *sess;
1640
1641 spin_lock_irqsave(&sesslock, flags);
1642 list_for_each_entry(sess, &sesslist, sess_list) {
1643 if (sess->sid == sid) {
1644 spin_unlock_irqrestore(&sesslock, flags);
1645 return sess;
1646 }
1647 }
1648 spin_unlock_irqrestore(&sesslock, flags);
1649 return NULL;
1650 }
1651
1652 /*
1653 * Returns the matching connection to a given sid / cid tuple
1654 */
1655 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1656 {
1657 unsigned long flags;
1658 struct iscsi_cls_conn *conn;
1659
1660 spin_lock_irqsave(&connlock, flags);
1661 list_for_each_entry(conn, &connlist, conn_list) {
1662 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1663 spin_unlock_irqrestore(&connlock, flags);
1664 return conn;
1665 }
1666 }
1667 spin_unlock_irqrestore(&connlock, flags);
1668 return NULL;
1669 }
1670
1671 /*
1672 * The following functions can be used by LLDs that allocate
1673 * their own scsi_hosts or by software iscsi LLDs
1674 */
1675 static struct {
1676 int value;
1677 char *name;
1678 } iscsi_session_state_names[] = {
1679 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1680 { ISCSI_SESSION_FAILED, "FAILED" },
1681 { ISCSI_SESSION_FREE, "FREE" },
1682 };
1683
1684 static const char *iscsi_session_state_name(int state)
1685 {
1686 int i;
1687 char *name = NULL;
1688
1689 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1690 if (iscsi_session_state_names[i].value == state) {
1691 name = iscsi_session_state_names[i].name;
1692 break;
1693 }
1694 }
1695 return name;
1696 }
1697
1698 int iscsi_session_chkready(struct iscsi_cls_session *session)
1699 {
1700 unsigned long flags;
1701 int err;
1702
1703 spin_lock_irqsave(&session->lock, flags);
1704 switch (session->state) {
1705 case ISCSI_SESSION_LOGGED_IN:
1706 err = 0;
1707 break;
1708 case ISCSI_SESSION_FAILED:
1709 err = DID_IMM_RETRY << 16;
1710 break;
1711 case ISCSI_SESSION_FREE:
1712 err = DID_TRANSPORT_FAILFAST << 16;
1713 break;
1714 default:
1715 err = DID_NO_CONNECT << 16;
1716 break;
1717 }
1718 spin_unlock_irqrestore(&session->lock, flags);
1719 return err;
1720 }
1721 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1722
1723 int iscsi_is_session_online(struct iscsi_cls_session *session)
1724 {
1725 unsigned long flags;
1726 int ret = 0;
1727
1728 spin_lock_irqsave(&session->lock, flags);
1729 if (session->state == ISCSI_SESSION_LOGGED_IN)
1730 ret = 1;
1731 spin_unlock_irqrestore(&session->lock, flags);
1732 return ret;
1733 }
1734 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1735
1736 static void iscsi_session_release(struct device *dev)
1737 {
1738 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1739 struct Scsi_Host *shost;
1740
1741 shost = iscsi_session_to_shost(session);
1742 scsi_host_put(shost);
1743 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1744 kfree(session);
1745 }
1746
1747 int iscsi_is_session_dev(const struct device *dev)
1748 {
1749 return dev->release == iscsi_session_release;
1750 }
1751 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1752
1753 static int iscsi_iter_session_fn(struct device *dev, void *data)
1754 {
1755 void (* fn) (struct iscsi_cls_session *) = data;
1756
1757 if (!iscsi_is_session_dev(dev))
1758 return 0;
1759 fn(iscsi_dev_to_session(dev));
1760 return 0;
1761 }
1762
1763 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1764 void (*fn)(struct iscsi_cls_session *))
1765 {
1766 device_for_each_child(&shost->shost_gendev, fn,
1767 iscsi_iter_session_fn);
1768 }
1769 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1770
1771 /**
1772 * iscsi_scan_finished - helper to report when running scans are done
1773 * @shost: scsi host
1774 * @time: scan run time
1775 *
1776 * This function can be used by drives like qla4xxx to report to the scsi
1777 * layer when the scans it kicked off at module load time are done.
1778 */
1779 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1780 {
1781 struct iscsi_cls_host *ihost = shost->shost_data;
1782 /*
1783 * qla4xxx will have kicked off some session unblocks before calling
1784 * scsi_scan_host, so just wait for them to complete.
1785 */
1786 return !atomic_read(&ihost->nr_scans);
1787 }
1788 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1789
1790 struct iscsi_scan_data {
1791 unsigned int channel;
1792 unsigned int id;
1793 u64 lun;
1794 enum scsi_scan_mode rescan;
1795 };
1796
1797 static int iscsi_user_scan_session(struct device *dev, void *data)
1798 {
1799 struct iscsi_scan_data *scan_data = data;
1800 struct iscsi_cls_session *session;
1801 struct Scsi_Host *shost;
1802 struct iscsi_cls_host *ihost;
1803 unsigned long flags;
1804 unsigned int id;
1805
1806 if (!iscsi_is_session_dev(dev))
1807 return 0;
1808
1809 session = iscsi_dev_to_session(dev);
1810
1811 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1812
1813 shost = iscsi_session_to_shost(session);
1814 ihost = shost->shost_data;
1815
1816 mutex_lock(&ihost->mutex);
1817 spin_lock_irqsave(&session->lock, flags);
1818 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1819 spin_unlock_irqrestore(&session->lock, flags);
1820 goto user_scan_exit;
1821 }
1822 id = session->target_id;
1823 spin_unlock_irqrestore(&session->lock, flags);
1824
1825 if (id != ISCSI_MAX_TARGET) {
1826 if ((scan_data->channel == SCAN_WILD_CARD ||
1827 scan_data->channel == 0) &&
1828 (scan_data->id == SCAN_WILD_CARD ||
1829 scan_data->id == id))
1830 scsi_scan_target(&session->dev, 0, id,
1831 scan_data->lun, scan_data->rescan);
1832 }
1833
1834 user_scan_exit:
1835 mutex_unlock(&ihost->mutex);
1836 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1837 return 0;
1838 }
1839
1840 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1841 uint id, u64 lun)
1842 {
1843 struct iscsi_scan_data scan_data;
1844
1845 scan_data.channel = channel;
1846 scan_data.id = id;
1847 scan_data.lun = lun;
1848 scan_data.rescan = SCSI_SCAN_MANUAL;
1849
1850 return device_for_each_child(&shost->shost_gendev, &scan_data,
1851 iscsi_user_scan_session);
1852 }
1853
1854 static void iscsi_scan_session(struct work_struct *work)
1855 {
1856 struct iscsi_cls_session *session =
1857 container_of(work, struct iscsi_cls_session, scan_work);
1858 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1859 struct iscsi_cls_host *ihost = shost->shost_data;
1860 struct iscsi_scan_data scan_data;
1861
1862 scan_data.channel = 0;
1863 scan_data.id = SCAN_WILD_CARD;
1864 scan_data.lun = SCAN_WILD_CARD;
1865 scan_data.rescan = SCSI_SCAN_RESCAN;
1866
1867 iscsi_user_scan_session(&session->dev, &scan_data);
1868 atomic_dec(&ihost->nr_scans);
1869 }
1870
1871 /**
1872 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1873 * @cmd: scsi cmd passed to scsi eh handler
1874 *
1875 * If the session is down this function will wait for the recovery
1876 * timer to fire or for the session to be logged back in. If the
1877 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1878 * should pass this error value to the scsi eh.
1879 */
1880 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1881 {
1882 struct iscsi_cls_session *session =
1883 starget_to_session(scsi_target(cmd->device));
1884 unsigned long flags;
1885 int ret = 0;
1886
1887 spin_lock_irqsave(&session->lock, flags);
1888 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1889 if (session->state == ISCSI_SESSION_FREE) {
1890 ret = FAST_IO_FAIL;
1891 break;
1892 }
1893 spin_unlock_irqrestore(&session->lock, flags);
1894 msleep(1000);
1895 spin_lock_irqsave(&session->lock, flags);
1896 }
1897 spin_unlock_irqrestore(&session->lock, flags);
1898 return ret;
1899 }
1900 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1901
1902 static void session_recovery_timedout(struct work_struct *work)
1903 {
1904 struct iscsi_cls_session *session =
1905 container_of(work, struct iscsi_cls_session,
1906 recovery_work.work);
1907 unsigned long flags;
1908
1909 iscsi_cls_session_printk(KERN_INFO, session,
1910 "session recovery timed out after %d secs\n",
1911 session->recovery_tmo);
1912
1913 spin_lock_irqsave(&session->lock, flags);
1914 switch (session->state) {
1915 case ISCSI_SESSION_FAILED:
1916 session->state = ISCSI_SESSION_FREE;
1917 break;
1918 case ISCSI_SESSION_LOGGED_IN:
1919 case ISCSI_SESSION_FREE:
1920 /* we raced with the unblock's flush */
1921 spin_unlock_irqrestore(&session->lock, flags);
1922 return;
1923 }
1924 spin_unlock_irqrestore(&session->lock, flags);
1925
1926 if (session->transport->session_recovery_timedout)
1927 session->transport->session_recovery_timedout(session);
1928
1929 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1930 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1931 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1932 }
1933
1934 static void __iscsi_unblock_session(struct work_struct *work)
1935 {
1936 struct iscsi_cls_session *session =
1937 container_of(work, struct iscsi_cls_session,
1938 unblock_work);
1939 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1940 struct iscsi_cls_host *ihost = shost->shost_data;
1941 unsigned long flags;
1942
1943 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1944 /*
1945 * The recovery and unblock work get run from the same workqueue,
1946 * so try to cancel it if it was going to run after this unblock.
1947 */
1948 cancel_delayed_work(&session->recovery_work);
1949 spin_lock_irqsave(&session->lock, flags);
1950 session->state = ISCSI_SESSION_LOGGED_IN;
1951 spin_unlock_irqrestore(&session->lock, flags);
1952 /* start IO */
1953 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1954 /*
1955 * Only do kernel scanning if the driver is properly hooked into
1956 * the async scanning code (drivers like iscsi_tcp do login and
1957 * scanning from userspace).
1958 */
1959 if (shost->hostt->scan_finished) {
1960 if (scsi_queue_work(shost, &session->scan_work))
1961 atomic_inc(&ihost->nr_scans);
1962 }
1963 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1964 }
1965
1966 /**
1967 * iscsi_unblock_session - set a session as logged in and start IO.
1968 * @session: iscsi session
1969 *
1970 * Mark a session as ready to accept IO.
1971 */
1972 void iscsi_unblock_session(struct iscsi_cls_session *session)
1973 {
1974 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1975 /*
1976 * make sure all the events have completed before tell the driver
1977 * it is safe
1978 */
1979 flush_workqueue(iscsi_eh_timer_workq);
1980 }
1981 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1982
1983 static void __iscsi_block_session(struct work_struct *work)
1984 {
1985 struct iscsi_cls_session *session =
1986 container_of(work, struct iscsi_cls_session,
1987 block_work);
1988 unsigned long flags;
1989
1990 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1991 spin_lock_irqsave(&session->lock, flags);
1992 session->state = ISCSI_SESSION_FAILED;
1993 spin_unlock_irqrestore(&session->lock, flags);
1994 scsi_target_block(&session->dev);
1995 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1996 if (session->recovery_tmo >= 0)
1997 queue_delayed_work(iscsi_eh_timer_workq,
1998 &session->recovery_work,
1999 session->recovery_tmo * HZ);
2000 }
2001
2002 void iscsi_block_session(struct iscsi_cls_session *session)
2003 {
2004 queue_work(iscsi_eh_timer_workq, &session->block_work);
2005 }
2006 EXPORT_SYMBOL_GPL(iscsi_block_session);
2007
2008 static void __iscsi_unbind_session(struct work_struct *work)
2009 {
2010 struct iscsi_cls_session *session =
2011 container_of(work, struct iscsi_cls_session,
2012 unbind_work);
2013 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2014 struct iscsi_cls_host *ihost = shost->shost_data;
2015 unsigned long flags;
2016 unsigned int target_id;
2017
2018 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2019
2020 /* Prevent new scans and make sure scanning is not in progress */
2021 mutex_lock(&ihost->mutex);
2022 spin_lock_irqsave(&session->lock, flags);
2023 if (session->target_id == ISCSI_MAX_TARGET) {
2024 spin_unlock_irqrestore(&session->lock, flags);
2025 mutex_unlock(&ihost->mutex);
2026 return;
2027 }
2028
2029 target_id = session->target_id;
2030 session->target_id = ISCSI_MAX_TARGET;
2031 spin_unlock_irqrestore(&session->lock, flags);
2032 mutex_unlock(&ihost->mutex);
2033
2034 if (session->ida_used)
2035 ida_simple_remove(&iscsi_sess_ida, target_id);
2036
2037 scsi_remove_target(&session->dev);
2038 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2039 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2040 }
2041
2042 struct iscsi_cls_session *
2043 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2044 int dd_size)
2045 {
2046 struct iscsi_cls_session *session;
2047
2048 session = kzalloc(sizeof(*session) + dd_size,
2049 GFP_KERNEL);
2050 if (!session)
2051 return NULL;
2052
2053 session->transport = transport;
2054 session->creator = -1;
2055 session->recovery_tmo = 120;
2056 session->recovery_tmo_sysfs_override = false;
2057 session->state = ISCSI_SESSION_FREE;
2058 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2059 INIT_LIST_HEAD(&session->sess_list);
2060 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2061 INIT_WORK(&session->block_work, __iscsi_block_session);
2062 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2063 INIT_WORK(&session->scan_work, iscsi_scan_session);
2064 spin_lock_init(&session->lock);
2065
2066 /* this is released in the dev's release function */
2067 scsi_host_get(shost);
2068 session->dev.parent = &shost->shost_gendev;
2069 session->dev.release = iscsi_session_release;
2070 device_initialize(&session->dev);
2071 if (dd_size)
2072 session->dd_data = &session[1];
2073
2074 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2075 return session;
2076 }
2077 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2078
2079 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2080 {
2081 unsigned long flags;
2082 int id = 0;
2083 int err;
2084
2085 session->sid = atomic_add_return(1, &iscsi_session_nr);
2086
2087 if (target_id == ISCSI_MAX_TARGET) {
2088 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2089
2090 if (id < 0) {
2091 iscsi_cls_session_printk(KERN_ERR, session,
2092 "Failure in Target ID Allocation\n");
2093 return id;
2094 }
2095 session->target_id = (unsigned int)id;
2096 session->ida_used = true;
2097 } else
2098 session->target_id = target_id;
2099
2100 dev_set_name(&session->dev, "session%u", session->sid);
2101 err = device_add(&session->dev);
2102 if (err) {
2103 iscsi_cls_session_printk(KERN_ERR, session,
2104 "could not register session's dev\n");
2105 goto release_ida;
2106 }
2107 transport_register_device(&session->dev);
2108
2109 spin_lock_irqsave(&sesslock, flags);
2110 list_add(&session->sess_list, &sesslist);
2111 spin_unlock_irqrestore(&sesslock, flags);
2112
2113 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2114 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2115 return 0;
2116
2117 release_ida:
2118 if (session->ida_used)
2119 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2120
2121 return err;
2122 }
2123 EXPORT_SYMBOL_GPL(iscsi_add_session);
2124
2125 /**
2126 * iscsi_create_session - create iscsi class session
2127 * @shost: scsi host
2128 * @transport: iscsi transport
2129 * @dd_size: private driver data size
2130 * @target_id: which target
2131 *
2132 * This can be called from a LLD or iscsi_transport.
2133 */
2134 struct iscsi_cls_session *
2135 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2136 int dd_size, unsigned int target_id)
2137 {
2138 struct iscsi_cls_session *session;
2139
2140 session = iscsi_alloc_session(shost, transport, dd_size);
2141 if (!session)
2142 return NULL;
2143
2144 if (iscsi_add_session(session, target_id)) {
2145 iscsi_free_session(session);
2146 return NULL;
2147 }
2148 return session;
2149 }
2150 EXPORT_SYMBOL_GPL(iscsi_create_session);
2151
2152 static void iscsi_conn_release(struct device *dev)
2153 {
2154 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2155 struct device *parent = conn->dev.parent;
2156
2157 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2158 kfree(conn);
2159 put_device(parent);
2160 }
2161
2162 static int iscsi_is_conn_dev(const struct device *dev)
2163 {
2164 return dev->release == iscsi_conn_release;
2165 }
2166
2167 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2168 {
2169 if (!iscsi_is_conn_dev(dev))
2170 return 0;
2171 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2172 }
2173
2174 void iscsi_remove_session(struct iscsi_cls_session *session)
2175 {
2176 unsigned long flags;
2177 int err;
2178
2179 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2180
2181 spin_lock_irqsave(&sesslock, flags);
2182 list_del(&session->sess_list);
2183 spin_unlock_irqrestore(&sesslock, flags);
2184
2185 /* make sure there are no blocks/unblocks queued */
2186 flush_workqueue(iscsi_eh_timer_workq);
2187 /* make sure the timedout callout is not running */
2188 if (!cancel_delayed_work(&session->recovery_work))
2189 flush_workqueue(iscsi_eh_timer_workq);
2190 /*
2191 * If we are blocked let commands flow again. The lld or iscsi
2192 * layer should set up the queuecommand to fail commands.
2193 * We assume that LLD will not be calling block/unblock while
2194 * removing the session.
2195 */
2196 spin_lock_irqsave(&session->lock, flags);
2197 session->state = ISCSI_SESSION_FREE;
2198 spin_unlock_irqrestore(&session->lock, flags);
2199
2200 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2201 /* flush running scans then delete devices */
2202 flush_work(&session->scan_work);
2203 /* flush running unbind operations */
2204 flush_work(&session->unbind_work);
2205 __iscsi_unbind_session(&session->unbind_work);
2206
2207 /* hw iscsi may not have removed all connections from session */
2208 err = device_for_each_child(&session->dev, NULL,
2209 iscsi_iter_destroy_conn_fn);
2210 if (err)
2211 iscsi_cls_session_printk(KERN_ERR, session,
2212 "Could not delete all connections "
2213 "for session. Error %d.\n", err);
2214
2215 transport_unregister_device(&session->dev);
2216
2217 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2218 device_del(&session->dev);
2219 }
2220 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2221
2222 void iscsi_free_session(struct iscsi_cls_session *session)
2223 {
2224 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2225 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2226 put_device(&session->dev);
2227 }
2228 EXPORT_SYMBOL_GPL(iscsi_free_session);
2229
2230 /**
2231 * iscsi_create_conn - create iscsi class connection
2232 * @session: iscsi cls session
2233 * @dd_size: private driver data size
2234 * @cid: connection id
2235 *
2236 * This can be called from a LLD or iscsi_transport. The connection
2237 * is child of the session so cid must be unique for all connections
2238 * on the session.
2239 *
2240 * Since we do not support MCS, cid will normally be zero. In some cases
2241 * for software iscsi we could be trying to preallocate a connection struct
2242 * in which case there could be two connection structs and cid would be
2243 * non-zero.
2244 */
2245 struct iscsi_cls_conn *
2246 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2247 {
2248 struct iscsi_transport *transport = session->transport;
2249 struct iscsi_cls_conn *conn;
2250 unsigned long flags;
2251 int err;
2252
2253 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2254 if (!conn)
2255 return NULL;
2256 if (dd_size)
2257 conn->dd_data = &conn[1];
2258
2259 mutex_init(&conn->ep_mutex);
2260 INIT_LIST_HEAD(&conn->conn_list);
2261 conn->transport = transport;
2262 conn->cid = cid;
2263
2264 /* this is released in the dev's release function */
2265 if (!get_device(&session->dev))
2266 goto free_conn;
2267
2268 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2269 conn->dev.parent = &session->dev;
2270 conn->dev.release = iscsi_conn_release;
2271 err = device_register(&conn->dev);
2272 if (err) {
2273 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2274 "register connection's dev\n");
2275 goto release_parent_ref;
2276 }
2277 transport_register_device(&conn->dev);
2278
2279 spin_lock_irqsave(&connlock, flags);
2280 list_add(&conn->conn_list, &connlist);
2281 spin_unlock_irqrestore(&connlock, flags);
2282
2283 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2284 return conn;
2285
2286 release_parent_ref:
2287 put_device(&session->dev);
2288 free_conn:
2289 kfree(conn);
2290 return NULL;
2291 }
2292
2293 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2294
2295 /**
2296 * iscsi_destroy_conn - destroy iscsi class connection
2297 * @conn: iscsi cls session
2298 *
2299 * This can be called from a LLD or iscsi_transport.
2300 */
2301 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2302 {
2303 unsigned long flags;
2304
2305 spin_lock_irqsave(&connlock, flags);
2306 list_del(&conn->conn_list);
2307 spin_unlock_irqrestore(&connlock, flags);
2308
2309 transport_unregister_device(&conn->dev);
2310 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2311 device_unregister(&conn->dev);
2312 return 0;
2313 }
2314 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2315
2316 /*
2317 * iscsi interface functions
2318 */
2319 static struct iscsi_internal *
2320 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2321 {
2322 struct iscsi_internal *priv;
2323 unsigned long flags;
2324
2325 spin_lock_irqsave(&iscsi_transport_lock, flags);
2326 list_for_each_entry(priv, &iscsi_transports, list) {
2327 if (tt == priv->iscsi_transport) {
2328 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2329 return priv;
2330 }
2331 }
2332 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2333 return NULL;
2334 }
2335
2336 static int
2337 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2338 {
2339 return nlmsg_multicast(nls, skb, 0, group, gfp);
2340 }
2341
2342 static int
2343 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2344 {
2345 return nlmsg_unicast(nls, skb, portid);
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(u32 portid, int type, void *payload, int size)
2551 {
2552 struct sk_buff *skb;
2553 struct nlmsghdr *nlh;
2554 int len = nlmsg_total_size(size);
2555
2556 skb = alloc_skb(len, GFP_ATOMIC);
2557 if (!skb) {
2558 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2559 return -ENOMEM;
2560 }
2561
2562 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2563 memcpy(nlmsg_data(nlh), payload, size);
2564 return iscsi_unicast_skb(skb, portid);
2565 }
2566
2567 static int
2568 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2569 {
2570 struct iscsi_uevent *ev = nlmsg_data(nlh);
2571 struct iscsi_stats *stats;
2572 struct sk_buff *skbstat;
2573 struct iscsi_cls_conn *conn;
2574 struct nlmsghdr *nlhstat;
2575 struct iscsi_uevent *evstat;
2576 struct iscsi_internal *priv;
2577 int len = nlmsg_total_size(sizeof(*ev) +
2578 sizeof(struct iscsi_stats) +
2579 sizeof(struct iscsi_stats_custom) *
2580 ISCSI_STATS_CUSTOM_MAX);
2581 int err = 0;
2582
2583 priv = iscsi_if_transport_lookup(transport);
2584 if (!priv)
2585 return -EINVAL;
2586
2587 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2588 if (!conn)
2589 return -EEXIST;
2590
2591 do {
2592 int actual_size;
2593
2594 skbstat = alloc_skb(len, GFP_ATOMIC);
2595 if (!skbstat) {
2596 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2597 "deliver stats: OOM\n");
2598 return -ENOMEM;
2599 }
2600
2601 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2602 (len - sizeof(*nlhstat)), 0);
2603 evstat = nlmsg_data(nlhstat);
2604 memset(evstat, 0, sizeof(*evstat));
2605 evstat->transport_handle = iscsi_handle(conn->transport);
2606 evstat->type = nlh->nlmsg_type;
2607 evstat->u.get_stats.cid =
2608 ev->u.get_stats.cid;
2609 evstat->u.get_stats.sid =
2610 ev->u.get_stats.sid;
2611 stats = (struct iscsi_stats *)
2612 ((char*)evstat + sizeof(*evstat));
2613 memset(stats, 0, sizeof(*stats));
2614
2615 transport->get_stats(conn, stats);
2616 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2617 sizeof(struct iscsi_stats) +
2618 sizeof(struct iscsi_stats_custom) *
2619 stats->custom_length);
2620 actual_size -= sizeof(*nlhstat);
2621 actual_size = nlmsg_msg_size(actual_size);
2622 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2623 nlhstat->nlmsg_len = actual_size;
2624
2625 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2626 GFP_ATOMIC);
2627 } while (err < 0 && err != -ECONNREFUSED);
2628
2629 return err;
2630 }
2631
2632 /**
2633 * iscsi_session_event - send session destr. completion event
2634 * @session: iscsi class session
2635 * @event: type of event
2636 */
2637 int iscsi_session_event(struct iscsi_cls_session *session,
2638 enum iscsi_uevent_e event)
2639 {
2640 struct iscsi_internal *priv;
2641 struct Scsi_Host *shost;
2642 struct iscsi_uevent *ev;
2643 struct sk_buff *skb;
2644 struct nlmsghdr *nlh;
2645 int rc, len = nlmsg_total_size(sizeof(*ev));
2646
2647 priv = iscsi_if_transport_lookup(session->transport);
2648 if (!priv)
2649 return -EINVAL;
2650 shost = iscsi_session_to_shost(session);
2651
2652 skb = alloc_skb(len, GFP_KERNEL);
2653 if (!skb) {
2654 iscsi_cls_session_printk(KERN_ERR, session,
2655 "Cannot notify userspace of session "
2656 "event %u\n", event);
2657 return -ENOMEM;
2658 }
2659
2660 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2661 ev = nlmsg_data(nlh);
2662 ev->transport_handle = iscsi_handle(session->transport);
2663
2664 ev->type = event;
2665 switch (event) {
2666 case ISCSI_KEVENT_DESTROY_SESSION:
2667 ev->r.d_session.host_no = shost->host_no;
2668 ev->r.d_session.sid = session->sid;
2669 break;
2670 case ISCSI_KEVENT_CREATE_SESSION:
2671 ev->r.c_session_ret.host_no = shost->host_no;
2672 ev->r.c_session_ret.sid = session->sid;
2673 break;
2674 case ISCSI_KEVENT_UNBIND_SESSION:
2675 ev->r.unbind_session.host_no = shost->host_no;
2676 ev->r.unbind_session.sid = session->sid;
2677 break;
2678 default:
2679 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2680 "%u.\n", event);
2681 kfree_skb(skb);
2682 return -EINVAL;
2683 }
2684
2685 /*
2686 * this will occur if the daemon is not up, so we just warn
2687 * the user and when the daemon is restarted it will handle it
2688 */
2689 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2690 if (rc == -ESRCH)
2691 iscsi_cls_session_printk(KERN_ERR, session,
2692 "Cannot notify userspace of session "
2693 "event %u. Check iscsi daemon\n",
2694 event);
2695
2696 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2697 event, rc);
2698 return rc;
2699 }
2700 EXPORT_SYMBOL_GPL(iscsi_session_event);
2701
2702 static int
2703 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2704 struct iscsi_uevent *ev, pid_t pid,
2705 uint32_t initial_cmdsn, uint16_t cmds_max,
2706 uint16_t queue_depth)
2707 {
2708 struct iscsi_transport *transport = priv->iscsi_transport;
2709 struct iscsi_cls_session *session;
2710 struct Scsi_Host *shost;
2711
2712 session = transport->create_session(ep, cmds_max, queue_depth,
2713 initial_cmdsn);
2714 if (!session)
2715 return -ENOMEM;
2716
2717 session->creator = pid;
2718 shost = iscsi_session_to_shost(session);
2719 ev->r.c_session_ret.host_no = shost->host_no;
2720 ev->r.c_session_ret.sid = session->sid;
2721 ISCSI_DBG_TRANS_SESSION(session,
2722 "Completed creating transport session\n");
2723 return 0;
2724 }
2725
2726 static int
2727 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2728 {
2729 struct iscsi_cls_conn *conn;
2730 struct iscsi_cls_session *session;
2731
2732 session = iscsi_session_lookup(ev->u.c_conn.sid);
2733 if (!session) {
2734 printk(KERN_ERR "iscsi: invalid session %d.\n",
2735 ev->u.c_conn.sid);
2736 return -EINVAL;
2737 }
2738
2739 conn = transport->create_conn(session, ev->u.c_conn.cid);
2740 if (!conn) {
2741 iscsi_cls_session_printk(KERN_ERR, session,
2742 "couldn't create a new connection.");
2743 return -ENOMEM;
2744 }
2745
2746 ev->r.c_conn_ret.sid = session->sid;
2747 ev->r.c_conn_ret.cid = conn->cid;
2748
2749 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2750 return 0;
2751 }
2752
2753 static int
2754 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2755 {
2756 struct iscsi_cls_conn *conn;
2757
2758 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2759 if (!conn)
2760 return -EINVAL;
2761
2762 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2763 if (transport->destroy_conn)
2764 transport->destroy_conn(conn);
2765
2766 return 0;
2767 }
2768
2769 static int
2770 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2771 {
2772 char *data = (char*)ev + sizeof(*ev);
2773 struct iscsi_cls_conn *conn;
2774 struct iscsi_cls_session *session;
2775 int err = 0, value = 0;
2776
2777 session = iscsi_session_lookup(ev->u.set_param.sid);
2778 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2779 if (!conn || !session)
2780 return -EINVAL;
2781
2782 switch (ev->u.set_param.param) {
2783 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2784 sscanf(data, "%d", &value);
2785 if (!session->recovery_tmo_sysfs_override)
2786 session->recovery_tmo = value;
2787 break;
2788 default:
2789 err = transport->set_param(conn, ev->u.set_param.param,
2790 data, ev->u.set_param.len);
2791 }
2792
2793 return err;
2794 }
2795
2796 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2797 struct iscsi_uevent *ev, int msg_type)
2798 {
2799 struct iscsi_endpoint *ep;
2800 struct sockaddr *dst_addr;
2801 struct Scsi_Host *shost = NULL;
2802 int non_blocking, err = 0;
2803
2804 if (!transport->ep_connect)
2805 return -EINVAL;
2806
2807 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2808 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2809 if (!shost) {
2810 printk(KERN_ERR "ep connect failed. Could not find "
2811 "host no %u\n",
2812 ev->u.ep_connect_through_host.host_no);
2813 return -ENODEV;
2814 }
2815 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2816 } else
2817 non_blocking = ev->u.ep_connect.non_blocking;
2818
2819 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2820 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2821 if (IS_ERR(ep)) {
2822 err = PTR_ERR(ep);
2823 goto release_host;
2824 }
2825
2826 ev->r.ep_connect_ret.handle = ep->id;
2827 release_host:
2828 if (shost)
2829 scsi_host_put(shost);
2830 return err;
2831 }
2832
2833 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2834 u64 ep_handle)
2835 {
2836 struct iscsi_cls_conn *conn;
2837 struct iscsi_endpoint *ep;
2838
2839 if (!transport->ep_disconnect)
2840 return -EINVAL;
2841
2842 ep = iscsi_lookup_endpoint(ep_handle);
2843 if (!ep)
2844 return -EINVAL;
2845 conn = ep->conn;
2846 if (conn) {
2847 mutex_lock(&conn->ep_mutex);
2848 conn->ep = NULL;
2849 mutex_unlock(&conn->ep_mutex);
2850 }
2851
2852 transport->ep_disconnect(ep);
2853 return 0;
2854 }
2855
2856 static int
2857 iscsi_if_transport_ep(struct iscsi_transport *transport,
2858 struct iscsi_uevent *ev, int msg_type)
2859 {
2860 struct iscsi_endpoint *ep;
2861 int rc = 0;
2862
2863 switch (msg_type) {
2864 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2865 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2866 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2867 break;
2868 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2869 if (!transport->ep_poll)
2870 return -EINVAL;
2871
2872 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2873 if (!ep)
2874 return -EINVAL;
2875
2876 ev->r.retcode = transport->ep_poll(ep,
2877 ev->u.ep_poll.timeout_ms);
2878 break;
2879 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2880 rc = iscsi_if_ep_disconnect(transport,
2881 ev->u.ep_disconnect.ep_handle);
2882 break;
2883 }
2884 return rc;
2885 }
2886
2887 static int
2888 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2889 struct iscsi_uevent *ev)
2890 {
2891 struct Scsi_Host *shost;
2892 struct sockaddr *dst_addr;
2893 int err;
2894
2895 if (!transport->tgt_dscvr)
2896 return -EINVAL;
2897
2898 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2899 if (!shost) {
2900 printk(KERN_ERR "target discovery could not find host no %u\n",
2901 ev->u.tgt_dscvr.host_no);
2902 return -ENODEV;
2903 }
2904
2905
2906 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2907 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2908 ev->u.tgt_dscvr.enable, dst_addr);
2909 scsi_host_put(shost);
2910 return err;
2911 }
2912
2913 static int
2914 iscsi_set_host_param(struct iscsi_transport *transport,
2915 struct iscsi_uevent *ev)
2916 {
2917 char *data = (char*)ev + sizeof(*ev);
2918 struct Scsi_Host *shost;
2919 int err;
2920
2921 if (!transport->set_host_param)
2922 return -ENOSYS;
2923
2924 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2925 if (!shost) {
2926 printk(KERN_ERR "set_host_param could not find host no %u\n",
2927 ev->u.set_host_param.host_no);
2928 return -ENODEV;
2929 }
2930
2931 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2932 data, ev->u.set_host_param.len);
2933 scsi_host_put(shost);
2934 return err;
2935 }
2936
2937 static int
2938 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2939 {
2940 struct Scsi_Host *shost;
2941 struct iscsi_path *params;
2942 int err;
2943
2944 if (!transport->set_path)
2945 return -ENOSYS;
2946
2947 shost = scsi_host_lookup(ev->u.set_path.host_no);
2948 if (!shost) {
2949 printk(KERN_ERR "set path could not find host no %u\n",
2950 ev->u.set_path.host_no);
2951 return -ENODEV;
2952 }
2953
2954 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2955 err = transport->set_path(shost, params);
2956
2957 scsi_host_put(shost);
2958 return err;
2959 }
2960
2961 static int
2962 iscsi_set_iface_params(struct iscsi_transport *transport,
2963 struct iscsi_uevent *ev, uint32_t len)
2964 {
2965 char *data = (char *)ev + sizeof(*ev);
2966 struct Scsi_Host *shost;
2967 int err;
2968
2969 if (!transport->set_iface_param)
2970 return -ENOSYS;
2971
2972 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2973 if (!shost) {
2974 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2975 ev->u.set_iface_params.host_no);
2976 return -ENODEV;
2977 }
2978
2979 err = transport->set_iface_param(shost, data, len);
2980 scsi_host_put(shost);
2981 return err;
2982 }
2983
2984 static int
2985 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2986 {
2987 struct Scsi_Host *shost;
2988 struct sockaddr *dst_addr;
2989 int err;
2990
2991 if (!transport->send_ping)
2992 return -ENOSYS;
2993
2994 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
2995 if (!shost) {
2996 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
2997 ev->u.iscsi_ping.host_no);
2998 return -ENODEV;
2999 }
3000
3001 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3002 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3003 ev->u.iscsi_ping.iface_type,
3004 ev->u.iscsi_ping.payload_size,
3005 ev->u.iscsi_ping.pid,
3006 dst_addr);
3007 scsi_host_put(shost);
3008 return err;
3009 }
3010
3011 static int
3012 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3013 {
3014 struct iscsi_uevent *ev = nlmsg_data(nlh);
3015 struct Scsi_Host *shost = NULL;
3016 struct iscsi_chap_rec *chap_rec;
3017 struct iscsi_internal *priv;
3018 struct sk_buff *skbchap;
3019 struct nlmsghdr *nlhchap;
3020 struct iscsi_uevent *evchap;
3021 uint32_t chap_buf_size;
3022 int len, err = 0;
3023 char *buf;
3024
3025 if (!transport->get_chap)
3026 return -EINVAL;
3027
3028 priv = iscsi_if_transport_lookup(transport);
3029 if (!priv)
3030 return -EINVAL;
3031
3032 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3033 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3034
3035 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3036 if (!shost) {
3037 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3038 __func__, ev->u.get_chap.host_no);
3039 return -ENODEV;
3040 }
3041
3042 do {
3043 int actual_size;
3044
3045 skbchap = alloc_skb(len, GFP_KERNEL);
3046 if (!skbchap) {
3047 printk(KERN_ERR "can not deliver chap: OOM\n");
3048 err = -ENOMEM;
3049 goto exit_get_chap;
3050 }
3051
3052 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3053 (len - sizeof(*nlhchap)), 0);
3054 evchap = nlmsg_data(nlhchap);
3055 memset(evchap, 0, sizeof(*evchap));
3056 evchap->transport_handle = iscsi_handle(transport);
3057 evchap->type = nlh->nlmsg_type;
3058 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3059 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3060 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3061 buf = (char *)evchap + sizeof(*evchap);
3062 memset(buf, 0, chap_buf_size);
3063
3064 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3065 &evchap->u.get_chap.num_entries, buf);
3066
3067 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3068 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3069 nlhchap->nlmsg_len = actual_size;
3070
3071 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3072 GFP_KERNEL);
3073 } while (err < 0 && err != -ECONNREFUSED);
3074
3075 exit_get_chap:
3076 scsi_host_put(shost);
3077 return err;
3078 }
3079
3080 static int iscsi_set_chap(struct iscsi_transport *transport,
3081 struct iscsi_uevent *ev, uint32_t len)
3082 {
3083 char *data = (char *)ev + sizeof(*ev);
3084 struct Scsi_Host *shost;
3085 int err = 0;
3086
3087 if (!transport->set_chap)
3088 return -ENOSYS;
3089
3090 shost = scsi_host_lookup(ev->u.set_path.host_no);
3091 if (!shost) {
3092 pr_err("%s could not find host no %u\n",
3093 __func__, ev->u.set_path.host_no);
3094 return -ENODEV;
3095 }
3096
3097 err = transport->set_chap(shost, data, len);
3098 scsi_host_put(shost);
3099 return err;
3100 }
3101
3102 static int iscsi_delete_chap(struct iscsi_transport *transport,
3103 struct iscsi_uevent *ev)
3104 {
3105 struct Scsi_Host *shost;
3106 int err = 0;
3107
3108 if (!transport->delete_chap)
3109 return -ENOSYS;
3110
3111 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3112 if (!shost) {
3113 printk(KERN_ERR "%s could not find host no %u\n",
3114 __func__, ev->u.delete_chap.host_no);
3115 return -ENODEV;
3116 }
3117
3118 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3119 scsi_host_put(shost);
3120 return err;
3121 }
3122
3123 static const struct {
3124 enum iscsi_discovery_parent_type value;
3125 char *name;
3126 } iscsi_discovery_parent_names[] = {
3127 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3128 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3129 {ISCSI_DISC_PARENT_ISNS, "isns" },
3130 };
3131
3132 char *iscsi_get_discovery_parent_name(int parent_type)
3133 {
3134 int i;
3135 char *state = "Unknown!";
3136
3137 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3138 if (iscsi_discovery_parent_names[i].value & parent_type) {
3139 state = iscsi_discovery_parent_names[i].name;
3140 break;
3141 }
3142 }
3143 return state;
3144 }
3145 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3146
3147 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3148 struct iscsi_uevent *ev, uint32_t len)
3149 {
3150 char *data = (char *)ev + sizeof(*ev);
3151 struct Scsi_Host *shost;
3152 struct iscsi_bus_flash_session *fnode_sess;
3153 struct iscsi_bus_flash_conn *fnode_conn;
3154 struct device *dev;
3155 uint32_t idx;
3156 int err = 0;
3157
3158 if (!transport->set_flashnode_param) {
3159 err = -ENOSYS;
3160 goto exit_set_fnode;
3161 }
3162
3163 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3164 if (!shost) {
3165 pr_err("%s could not find host no %u\n",
3166 __func__, ev->u.set_flashnode.host_no);
3167 err = -ENODEV;
3168 goto put_host;
3169 }
3170
3171 idx = ev->u.set_flashnode.flashnode_idx;
3172 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3173 if (!fnode_sess) {
3174 pr_err("%s could not find flashnode %u for host no %u\n",
3175 __func__, idx, ev->u.set_flashnode.host_no);
3176 err = -ENODEV;
3177 goto put_host;
3178 }
3179
3180 dev = iscsi_find_flashnode_conn(fnode_sess);
3181 if (!dev) {
3182 err = -ENODEV;
3183 goto put_sess;
3184 }
3185
3186 fnode_conn = iscsi_dev_to_flash_conn(dev);
3187 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3188 put_device(dev);
3189
3190 put_sess:
3191 put_device(&fnode_sess->dev);
3192
3193 put_host:
3194 scsi_host_put(shost);
3195
3196 exit_set_fnode:
3197 return err;
3198 }
3199
3200 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3201 struct iscsi_uevent *ev, uint32_t len)
3202 {
3203 char *data = (char *)ev + sizeof(*ev);
3204 struct Scsi_Host *shost;
3205 int index;
3206 int err = 0;
3207
3208 if (!transport->new_flashnode) {
3209 err = -ENOSYS;
3210 goto exit_new_fnode;
3211 }
3212
3213 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3214 if (!shost) {
3215 pr_err("%s could not find host no %u\n",
3216 __func__, ev->u.new_flashnode.host_no);
3217 err = -ENODEV;
3218 goto put_host;
3219 }
3220
3221 index = transport->new_flashnode(shost, data, len);
3222
3223 if (index >= 0)
3224 ev->r.new_flashnode_ret.flashnode_idx = index;
3225 else
3226 err = -EIO;
3227
3228 put_host:
3229 scsi_host_put(shost);
3230
3231 exit_new_fnode:
3232 return err;
3233 }
3234
3235 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3236 struct iscsi_uevent *ev)
3237 {
3238 struct Scsi_Host *shost;
3239 struct iscsi_bus_flash_session *fnode_sess;
3240 uint32_t idx;
3241 int err = 0;
3242
3243 if (!transport->del_flashnode) {
3244 err = -ENOSYS;
3245 goto exit_del_fnode;
3246 }
3247
3248 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3249 if (!shost) {
3250 pr_err("%s could not find host no %u\n",
3251 __func__, ev->u.del_flashnode.host_no);
3252 err = -ENODEV;
3253 goto put_host;
3254 }
3255
3256 idx = ev->u.del_flashnode.flashnode_idx;
3257 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3258 if (!fnode_sess) {
3259 pr_err("%s could not find flashnode %u for host no %u\n",
3260 __func__, idx, ev->u.del_flashnode.host_no);
3261 err = -ENODEV;
3262 goto put_host;
3263 }
3264
3265 err = transport->del_flashnode(fnode_sess);
3266 put_device(&fnode_sess->dev);
3267
3268 put_host:
3269 scsi_host_put(shost);
3270
3271 exit_del_fnode:
3272 return err;
3273 }
3274
3275 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3276 struct iscsi_uevent *ev)
3277 {
3278 struct Scsi_Host *shost;
3279 struct iscsi_bus_flash_session *fnode_sess;
3280 struct iscsi_bus_flash_conn *fnode_conn;
3281 struct device *dev;
3282 uint32_t idx;
3283 int err = 0;
3284
3285 if (!transport->login_flashnode) {
3286 err = -ENOSYS;
3287 goto exit_login_fnode;
3288 }
3289
3290 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3291 if (!shost) {
3292 pr_err("%s could not find host no %u\n",
3293 __func__, ev->u.login_flashnode.host_no);
3294 err = -ENODEV;
3295 goto put_host;
3296 }
3297
3298 idx = ev->u.login_flashnode.flashnode_idx;
3299 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3300 if (!fnode_sess) {
3301 pr_err("%s could not find flashnode %u for host no %u\n",
3302 __func__, idx, ev->u.login_flashnode.host_no);
3303 err = -ENODEV;
3304 goto put_host;
3305 }
3306
3307 dev = iscsi_find_flashnode_conn(fnode_sess);
3308 if (!dev) {
3309 err = -ENODEV;
3310 goto put_sess;
3311 }
3312
3313 fnode_conn = iscsi_dev_to_flash_conn(dev);
3314 err = transport->login_flashnode(fnode_sess, fnode_conn);
3315 put_device(dev);
3316
3317 put_sess:
3318 put_device(&fnode_sess->dev);
3319
3320 put_host:
3321 scsi_host_put(shost);
3322
3323 exit_login_fnode:
3324 return err;
3325 }
3326
3327 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3328 struct iscsi_uevent *ev)
3329 {
3330 struct Scsi_Host *shost;
3331 struct iscsi_bus_flash_session *fnode_sess;
3332 struct iscsi_bus_flash_conn *fnode_conn;
3333 struct device *dev;
3334 uint32_t idx;
3335 int err = 0;
3336
3337 if (!transport->logout_flashnode) {
3338 err = -ENOSYS;
3339 goto exit_logout_fnode;
3340 }
3341
3342 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3343 if (!shost) {
3344 pr_err("%s could not find host no %u\n",
3345 __func__, ev->u.logout_flashnode.host_no);
3346 err = -ENODEV;
3347 goto put_host;
3348 }
3349
3350 idx = ev->u.logout_flashnode.flashnode_idx;
3351 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3352 if (!fnode_sess) {
3353 pr_err("%s could not find flashnode %u for host no %u\n",
3354 __func__, idx, ev->u.logout_flashnode.host_no);
3355 err = -ENODEV;
3356 goto put_host;
3357 }
3358
3359 dev = iscsi_find_flashnode_conn(fnode_sess);
3360 if (!dev) {
3361 err = -ENODEV;
3362 goto put_sess;
3363 }
3364
3365 fnode_conn = iscsi_dev_to_flash_conn(dev);
3366
3367 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3368 put_device(dev);
3369
3370 put_sess:
3371 put_device(&fnode_sess->dev);
3372
3373 put_host:
3374 scsi_host_put(shost);
3375
3376 exit_logout_fnode:
3377 return err;
3378 }
3379
3380 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3381 struct iscsi_uevent *ev)
3382 {
3383 struct Scsi_Host *shost;
3384 struct iscsi_cls_session *session;
3385 int err = 0;
3386
3387 if (!transport->logout_flashnode_sid) {
3388 err = -ENOSYS;
3389 goto exit_logout_sid;
3390 }
3391
3392 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3393 if (!shost) {
3394 pr_err("%s could not find host no %u\n",
3395 __func__, ev->u.logout_flashnode.host_no);
3396 err = -ENODEV;
3397 goto put_host;
3398 }
3399
3400 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3401 if (!session) {
3402 pr_err("%s could not find session id %u\n",
3403 __func__, ev->u.logout_flashnode_sid.sid);
3404 err = -EINVAL;
3405 goto put_host;
3406 }
3407
3408 err = transport->logout_flashnode_sid(session);
3409
3410 put_host:
3411 scsi_host_put(shost);
3412
3413 exit_logout_sid:
3414 return err;
3415 }
3416
3417 static int
3418 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3419 {
3420 struct iscsi_uevent *ev = nlmsg_data(nlh);
3421 struct Scsi_Host *shost = NULL;
3422 struct iscsi_internal *priv;
3423 struct sk_buff *skbhost_stats;
3424 struct nlmsghdr *nlhhost_stats;
3425 struct iscsi_uevent *evhost_stats;
3426 int host_stats_size = 0;
3427 int len, err = 0;
3428 char *buf;
3429
3430 if (!transport->get_host_stats)
3431 return -ENOSYS;
3432
3433 priv = iscsi_if_transport_lookup(transport);
3434 if (!priv)
3435 return -EINVAL;
3436
3437 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3438 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3439
3440 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3441 if (!shost) {
3442 pr_err("%s: failed. Could not find host no %u\n",
3443 __func__, ev->u.get_host_stats.host_no);
3444 return -ENODEV;
3445 }
3446
3447 do {
3448 int actual_size;
3449
3450 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3451 if (!skbhost_stats) {
3452 pr_err("cannot deliver host stats: OOM\n");
3453 err = -ENOMEM;
3454 goto exit_host_stats;
3455 }
3456
3457 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3458 (len - sizeof(*nlhhost_stats)), 0);
3459 evhost_stats = nlmsg_data(nlhhost_stats);
3460 memset(evhost_stats, 0, sizeof(*evhost_stats));
3461 evhost_stats->transport_handle = iscsi_handle(transport);
3462 evhost_stats->type = nlh->nlmsg_type;
3463 evhost_stats->u.get_host_stats.host_no =
3464 ev->u.get_host_stats.host_no;
3465 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3466 memset(buf, 0, host_stats_size);
3467
3468 err = transport->get_host_stats(shost, buf, host_stats_size);
3469 if (err) {
3470 kfree_skb(skbhost_stats);
3471 goto exit_host_stats;
3472 }
3473
3474 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3475 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3476 nlhhost_stats->nlmsg_len = actual_size;
3477
3478 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3479 GFP_KERNEL);
3480 } while (err < 0 && err != -ECONNREFUSED);
3481
3482 exit_host_stats:
3483 scsi_host_put(shost);
3484 return err;
3485 }
3486
3487
3488 static int
3489 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3490 {
3491 int err = 0;
3492 u32 portid;
3493 struct iscsi_uevent *ev = nlmsg_data(nlh);
3494 struct iscsi_transport *transport = NULL;
3495 struct iscsi_internal *priv;
3496 struct iscsi_cls_session *session;
3497 struct iscsi_cls_conn *conn;
3498 struct iscsi_endpoint *ep = NULL;
3499
3500 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3501 *group = ISCSI_NL_GRP_UIP;
3502 else
3503 *group = ISCSI_NL_GRP_ISCSID;
3504
3505 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3506 if (!priv)
3507 return -EINVAL;
3508 transport = priv->iscsi_transport;
3509
3510 if (!try_module_get(transport->owner))
3511 return -EINVAL;
3512
3513 portid = NETLINK_CB(skb).portid;
3514
3515 switch (nlh->nlmsg_type) {
3516 case ISCSI_UEVENT_CREATE_SESSION:
3517 err = iscsi_if_create_session(priv, ep, ev,
3518 portid,
3519 ev->u.c_session.initial_cmdsn,
3520 ev->u.c_session.cmds_max,
3521 ev->u.c_session.queue_depth);
3522 break;
3523 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3524 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3525 if (!ep) {
3526 err = -EINVAL;
3527 break;
3528 }
3529
3530 err = iscsi_if_create_session(priv, ep, ev,
3531 portid,
3532 ev->u.c_bound_session.initial_cmdsn,
3533 ev->u.c_bound_session.cmds_max,
3534 ev->u.c_bound_session.queue_depth);
3535 break;
3536 case ISCSI_UEVENT_DESTROY_SESSION:
3537 session = iscsi_session_lookup(ev->u.d_session.sid);
3538 if (session)
3539 transport->destroy_session(session);
3540 else
3541 err = -EINVAL;
3542 break;
3543 case ISCSI_UEVENT_UNBIND_SESSION:
3544 session = iscsi_session_lookup(ev->u.d_session.sid);
3545 if (session)
3546 scsi_queue_work(iscsi_session_to_shost(session),
3547 &session->unbind_work);
3548 else
3549 err = -EINVAL;
3550 break;
3551 case ISCSI_UEVENT_CREATE_CONN:
3552 err = iscsi_if_create_conn(transport, ev);
3553 break;
3554 case ISCSI_UEVENT_DESTROY_CONN:
3555 err = iscsi_if_destroy_conn(transport, ev);
3556 break;
3557 case ISCSI_UEVENT_BIND_CONN:
3558 session = iscsi_session_lookup(ev->u.b_conn.sid);
3559 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3560
3561 if (conn && conn->ep)
3562 iscsi_if_ep_disconnect(transport, conn->ep->id);
3563
3564 if (!session || !conn) {
3565 err = -EINVAL;
3566 break;
3567 }
3568
3569 ev->r.retcode = transport->bind_conn(session, conn,
3570 ev->u.b_conn.transport_eph,
3571 ev->u.b_conn.is_leading);
3572 if (ev->r.retcode || !transport->ep_connect)
3573 break;
3574
3575 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3576 if (ep) {
3577 ep->conn = conn;
3578
3579 mutex_lock(&conn->ep_mutex);
3580 conn->ep = ep;
3581 mutex_unlock(&conn->ep_mutex);
3582 } else
3583 iscsi_cls_conn_printk(KERN_ERR, conn,
3584 "Could not set ep conn "
3585 "binding\n");
3586 break;
3587 case ISCSI_UEVENT_SET_PARAM:
3588 err = iscsi_set_param(transport, ev);
3589 break;
3590 case ISCSI_UEVENT_START_CONN:
3591 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3592 if (conn)
3593 ev->r.retcode = transport->start_conn(conn);
3594 else
3595 err = -EINVAL;
3596 break;
3597 case ISCSI_UEVENT_STOP_CONN:
3598 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3599 if (conn)
3600 transport->stop_conn(conn, ev->u.stop_conn.flag);
3601 else
3602 err = -EINVAL;
3603 break;
3604 case ISCSI_UEVENT_SEND_PDU:
3605 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3606 if (conn)
3607 ev->r.retcode = transport->send_pdu(conn,
3608 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3609 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3610 ev->u.send_pdu.data_size);
3611 else
3612 err = -EINVAL;
3613 break;
3614 case ISCSI_UEVENT_GET_STATS:
3615 err = iscsi_if_get_stats(transport, nlh);
3616 break;
3617 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3618 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3619 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3620 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3621 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3622 break;
3623 case ISCSI_UEVENT_TGT_DSCVR:
3624 err = iscsi_tgt_dscvr(transport, ev);
3625 break;
3626 case ISCSI_UEVENT_SET_HOST_PARAM:
3627 err = iscsi_set_host_param(transport, ev);
3628 break;
3629 case ISCSI_UEVENT_PATH_UPDATE:
3630 err = iscsi_set_path(transport, ev);
3631 break;
3632 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3633 err = iscsi_set_iface_params(transport, ev,
3634 nlmsg_attrlen(nlh, sizeof(*ev)));
3635 break;
3636 case ISCSI_UEVENT_PING:
3637 err = iscsi_send_ping(transport, ev);
3638 break;
3639 case ISCSI_UEVENT_GET_CHAP:
3640 err = iscsi_get_chap(transport, nlh);
3641 break;
3642 case ISCSI_UEVENT_DELETE_CHAP:
3643 err = iscsi_delete_chap(transport, ev);
3644 break;
3645 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3646 err = iscsi_set_flashnode_param(transport, ev,
3647 nlmsg_attrlen(nlh,
3648 sizeof(*ev)));
3649 break;
3650 case ISCSI_UEVENT_NEW_FLASHNODE:
3651 err = iscsi_new_flashnode(transport, ev,
3652 nlmsg_attrlen(nlh, sizeof(*ev)));
3653 break;
3654 case ISCSI_UEVENT_DEL_FLASHNODE:
3655 err = iscsi_del_flashnode(transport, ev);
3656 break;
3657 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3658 err = iscsi_login_flashnode(transport, ev);
3659 break;
3660 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3661 err = iscsi_logout_flashnode(transport, ev);
3662 break;
3663 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3664 err = iscsi_logout_flashnode_sid(transport, ev);
3665 break;
3666 case ISCSI_UEVENT_SET_CHAP:
3667 err = iscsi_set_chap(transport, ev,
3668 nlmsg_attrlen(nlh, sizeof(*ev)));
3669 break;
3670 case ISCSI_UEVENT_GET_HOST_STATS:
3671 err = iscsi_get_host_stats(transport, nlh);
3672 break;
3673 default:
3674 err = -ENOSYS;
3675 break;
3676 }
3677
3678 module_put(transport->owner);
3679 return err;
3680 }
3681
3682 /*
3683 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3684 * Malformed skbs with wrong lengths or invalid creds are not processed.
3685 */
3686 static void
3687 iscsi_if_rx(struct sk_buff *skb)
3688 {
3689 u32 portid = NETLINK_CB(skb).portid;
3690
3691 mutex_lock(&rx_queue_mutex);
3692 while (skb->len >= NLMSG_HDRLEN) {
3693 int err;
3694 uint32_t rlen;
3695 struct nlmsghdr *nlh;
3696 struct iscsi_uevent *ev;
3697 uint32_t group;
3698
3699 nlh = nlmsg_hdr(skb);
3700 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3701 skb->len < nlh->nlmsg_len) {
3702 break;
3703 }
3704
3705 ev = nlmsg_data(nlh);
3706 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3707 if (rlen > skb->len)
3708 rlen = skb->len;
3709
3710 err = iscsi_if_recv_msg(skb, nlh, &group);
3711 if (err) {
3712 ev->type = ISCSI_KEVENT_IF_ERROR;
3713 ev->iferror = err;
3714 }
3715 do {
3716 /*
3717 * special case for GET_STATS:
3718 * on success - sending reply and stats from
3719 * inside of if_recv_msg(),
3720 * on error - fall through.
3721 */
3722 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3723 break;
3724 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3725 break;
3726 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3727 ev, sizeof(*ev));
3728 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3729 skb_pull(skb, rlen);
3730 }
3731 mutex_unlock(&rx_queue_mutex);
3732 }
3733
3734 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3735 struct device_attribute dev_attr_##_prefix##_##_name = \
3736 __ATTR(_name,_mode,_show,_store)
3737
3738 /*
3739 * iSCSI connection attrs
3740 */
3741 #define iscsi_conn_attr_show(param) \
3742 static ssize_t \
3743 show_conn_param_##param(struct device *dev, \
3744 struct device_attribute *attr, char *buf) \
3745 { \
3746 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3747 struct iscsi_transport *t = conn->transport; \
3748 return t->get_conn_param(conn, param, buf); \
3749 }
3750
3751 #define iscsi_conn_attr(field, param) \
3752 iscsi_conn_attr_show(param) \
3753 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3754 NULL);
3755
3756 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3757 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3758 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3759 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3760 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3761 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3762 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3763 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3764 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3765 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3766 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3767 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3768 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3769 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3770 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3771 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3772 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3773 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3774 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3775 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3776 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3777 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3778 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3779 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3780 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3781 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3782 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3783 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3784
3785
3786 #define iscsi_conn_ep_attr_show(param) \
3787 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3788 struct device_attribute *attr,\
3789 char *buf) \
3790 { \
3791 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3792 struct iscsi_transport *t = conn->transport; \
3793 struct iscsi_endpoint *ep; \
3794 ssize_t rc; \
3795 \
3796 /* \
3797 * Need to make sure ep_disconnect does not free the LLD's \
3798 * interconnect resources while we are trying to read them. \
3799 */ \
3800 mutex_lock(&conn->ep_mutex); \
3801 ep = conn->ep; \
3802 if (!ep && t->ep_connect) { \
3803 mutex_unlock(&conn->ep_mutex); \
3804 return -ENOTCONN; \
3805 } \
3806 \
3807 if (ep) \
3808 rc = t->get_ep_param(ep, param, buf); \
3809 else \
3810 rc = t->get_conn_param(conn, param, buf); \
3811 mutex_unlock(&conn->ep_mutex); \
3812 return rc; \
3813 }
3814
3815 #define iscsi_conn_ep_attr(field, param) \
3816 iscsi_conn_ep_attr_show(param) \
3817 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3818 show_conn_ep_param_##param, NULL);
3819
3820 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3821 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3822
3823 static struct attribute *iscsi_conn_attrs[] = {
3824 &dev_attr_conn_max_recv_dlength.attr,
3825 &dev_attr_conn_max_xmit_dlength.attr,
3826 &dev_attr_conn_header_digest.attr,
3827 &dev_attr_conn_data_digest.attr,
3828 &dev_attr_conn_ifmarker.attr,
3829 &dev_attr_conn_ofmarker.attr,
3830 &dev_attr_conn_address.attr,
3831 &dev_attr_conn_port.attr,
3832 &dev_attr_conn_exp_statsn.attr,
3833 &dev_attr_conn_persistent_address.attr,
3834 &dev_attr_conn_persistent_port.attr,
3835 &dev_attr_conn_ping_tmo.attr,
3836 &dev_attr_conn_recv_tmo.attr,
3837 &dev_attr_conn_local_port.attr,
3838 &dev_attr_conn_statsn.attr,
3839 &dev_attr_conn_keepalive_tmo.attr,
3840 &dev_attr_conn_max_segment_size.attr,
3841 &dev_attr_conn_tcp_timestamp_stat.attr,
3842 &dev_attr_conn_tcp_wsf_disable.attr,
3843 &dev_attr_conn_tcp_nagle_disable.attr,
3844 &dev_attr_conn_tcp_timer_scale.attr,
3845 &dev_attr_conn_tcp_timestamp_enable.attr,
3846 &dev_attr_conn_fragment_disable.attr,
3847 &dev_attr_conn_ipv4_tos.attr,
3848 &dev_attr_conn_ipv6_traffic_class.attr,
3849 &dev_attr_conn_ipv6_flow_label.attr,
3850 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3851 &dev_attr_conn_tcp_xmit_wsf.attr,
3852 &dev_attr_conn_tcp_recv_wsf.attr,
3853 &dev_attr_conn_local_ipaddr.attr,
3854 NULL,
3855 };
3856
3857 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3858 struct attribute *attr, int i)
3859 {
3860 struct device *cdev = container_of(kobj, struct device, kobj);
3861 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3862 struct iscsi_transport *t = conn->transport;
3863 int param;
3864
3865 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3866 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3867 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3868 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3869 else if (attr == &dev_attr_conn_header_digest.attr)
3870 param = ISCSI_PARAM_HDRDGST_EN;
3871 else if (attr == &dev_attr_conn_data_digest.attr)
3872 param = ISCSI_PARAM_DATADGST_EN;
3873 else if (attr == &dev_attr_conn_ifmarker.attr)
3874 param = ISCSI_PARAM_IFMARKER_EN;
3875 else if (attr == &dev_attr_conn_ofmarker.attr)
3876 param = ISCSI_PARAM_OFMARKER_EN;
3877 else if (attr == &dev_attr_conn_address.attr)
3878 param = ISCSI_PARAM_CONN_ADDRESS;
3879 else if (attr == &dev_attr_conn_port.attr)
3880 param = ISCSI_PARAM_CONN_PORT;
3881 else if (attr == &dev_attr_conn_exp_statsn.attr)
3882 param = ISCSI_PARAM_EXP_STATSN;
3883 else if (attr == &dev_attr_conn_persistent_address.attr)
3884 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3885 else if (attr == &dev_attr_conn_persistent_port.attr)
3886 param = ISCSI_PARAM_PERSISTENT_PORT;
3887 else if (attr == &dev_attr_conn_ping_tmo.attr)
3888 param = ISCSI_PARAM_PING_TMO;
3889 else if (attr == &dev_attr_conn_recv_tmo.attr)
3890 param = ISCSI_PARAM_RECV_TMO;
3891 else if (attr == &dev_attr_conn_local_port.attr)
3892 param = ISCSI_PARAM_LOCAL_PORT;
3893 else if (attr == &dev_attr_conn_statsn.attr)
3894 param = ISCSI_PARAM_STATSN;
3895 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3896 param = ISCSI_PARAM_KEEPALIVE_TMO;
3897 else if (attr == &dev_attr_conn_max_segment_size.attr)
3898 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3899 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3900 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3901 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3902 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3903 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3904 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3905 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3906 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3907 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3908 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3909 else if (attr == &dev_attr_conn_fragment_disable.attr)
3910 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3911 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3912 param = ISCSI_PARAM_IPV4_TOS;
3913 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3914 param = ISCSI_PARAM_IPV6_TC;
3915 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3916 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3917 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3918 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3919 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3920 param = ISCSI_PARAM_TCP_XMIT_WSF;
3921 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3922 param = ISCSI_PARAM_TCP_RECV_WSF;
3923 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3924 param = ISCSI_PARAM_LOCAL_IPADDR;
3925 else {
3926 WARN_ONCE(1, "Invalid conn attr");
3927 return 0;
3928 }
3929
3930 return t->attr_is_visible(ISCSI_PARAM, param);
3931 }
3932
3933 static struct attribute_group iscsi_conn_group = {
3934 .attrs = iscsi_conn_attrs,
3935 .is_visible = iscsi_conn_attr_is_visible,
3936 };
3937
3938 /*
3939 * iSCSI session attrs
3940 */
3941 #define iscsi_session_attr_show(param, perm) \
3942 static ssize_t \
3943 show_session_param_##param(struct device *dev, \
3944 struct device_attribute *attr, char *buf) \
3945 { \
3946 struct iscsi_cls_session *session = \
3947 iscsi_dev_to_session(dev->parent); \
3948 struct iscsi_transport *t = session->transport; \
3949 \
3950 if (perm && !capable(CAP_SYS_ADMIN)) \
3951 return -EACCES; \
3952 return t->get_session_param(session, param, buf); \
3953 }
3954
3955 #define iscsi_session_attr(field, param, perm) \
3956 iscsi_session_attr_show(param, perm) \
3957 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3958 NULL);
3959 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3960 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3961 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3962 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3963 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3964 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3965 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3966 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3967 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3968 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3969 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3970 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3971 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3972 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
3973 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3974 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
3975 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3976 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3977 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3978 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
3979 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3980 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3981 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3982 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3983 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3984 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
3985 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3986 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3987 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3988 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3989 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3990 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3991 iscsi_session_attr(discovery_auth_optional,
3992 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3993 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3994 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3995 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3996 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3997 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3998 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3999 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4000
4001 static ssize_t
4002 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4003 char *buf)
4004 {
4005 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4006 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4007 }
4008 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4009 NULL);
4010 static ssize_t
4011 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4012 char *buf)
4013 {
4014 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4015 return sprintf(buf, "%d\n", session->creator);
4016 }
4017 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4018 NULL);
4019 static ssize_t
4020 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4021 char *buf)
4022 {
4023 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4024 return sprintf(buf, "%d\n", session->target_id);
4025 }
4026 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4027 show_priv_session_target_id, NULL);
4028
4029 #define iscsi_priv_session_attr_show(field, format) \
4030 static ssize_t \
4031 show_priv_session_##field(struct device *dev, \
4032 struct device_attribute *attr, char *buf) \
4033 { \
4034 struct iscsi_cls_session *session = \
4035 iscsi_dev_to_session(dev->parent); \
4036 if (session->field == -1) \
4037 return sprintf(buf, "off\n"); \
4038 return sprintf(buf, format"\n", session->field); \
4039 }
4040
4041 #define iscsi_priv_session_attr_store(field) \
4042 static ssize_t \
4043 store_priv_session_##field(struct device *dev, \
4044 struct device_attribute *attr, \
4045 const char *buf, size_t count) \
4046 { \
4047 int val; \
4048 char *cp; \
4049 struct iscsi_cls_session *session = \
4050 iscsi_dev_to_session(dev->parent); \
4051 if ((session->state == ISCSI_SESSION_FREE) || \
4052 (session->state == ISCSI_SESSION_FAILED)) \
4053 return -EBUSY; \
4054 if (strncmp(buf, "off", 3) == 0) { \
4055 session->field = -1; \
4056 session->field##_sysfs_override = true; \
4057 } else { \
4058 val = simple_strtoul(buf, &cp, 0); \
4059 if (*cp != '\0' && *cp != '\n') \
4060 return -EINVAL; \
4061 session->field = val; \
4062 session->field##_sysfs_override = true; \
4063 } \
4064 return count; \
4065 }
4066
4067 #define iscsi_priv_session_rw_attr(field, format) \
4068 iscsi_priv_session_attr_show(field, format) \
4069 iscsi_priv_session_attr_store(field) \
4070 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4071 show_priv_session_##field, \
4072 store_priv_session_##field)
4073
4074 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4075
4076 static struct attribute *iscsi_session_attrs[] = {
4077 &dev_attr_sess_initial_r2t.attr,
4078 &dev_attr_sess_max_outstanding_r2t.attr,
4079 &dev_attr_sess_immediate_data.attr,
4080 &dev_attr_sess_first_burst_len.attr,
4081 &dev_attr_sess_max_burst_len.attr,
4082 &dev_attr_sess_data_pdu_in_order.attr,
4083 &dev_attr_sess_data_seq_in_order.attr,
4084 &dev_attr_sess_erl.attr,
4085 &dev_attr_sess_targetname.attr,
4086 &dev_attr_sess_tpgt.attr,
4087 &dev_attr_sess_password.attr,
4088 &dev_attr_sess_password_in.attr,
4089 &dev_attr_sess_username.attr,
4090 &dev_attr_sess_username_in.attr,
4091 &dev_attr_sess_fast_abort.attr,
4092 &dev_attr_sess_abort_tmo.attr,
4093 &dev_attr_sess_lu_reset_tmo.attr,
4094 &dev_attr_sess_tgt_reset_tmo.attr,
4095 &dev_attr_sess_ifacename.attr,
4096 &dev_attr_sess_initiatorname.attr,
4097 &dev_attr_sess_targetalias.attr,
4098 &dev_attr_sess_boot_root.attr,
4099 &dev_attr_sess_boot_nic.attr,
4100 &dev_attr_sess_boot_target.attr,
4101 &dev_attr_priv_sess_recovery_tmo.attr,
4102 &dev_attr_priv_sess_state.attr,
4103 &dev_attr_priv_sess_creator.attr,
4104 &dev_attr_sess_chap_out_idx.attr,
4105 &dev_attr_sess_chap_in_idx.attr,
4106 &dev_attr_priv_sess_target_id.attr,
4107 &dev_attr_sess_auto_snd_tgt_disable.attr,
4108 &dev_attr_sess_discovery_session.attr,
4109 &dev_attr_sess_portal_type.attr,
4110 &dev_attr_sess_chap_auth.attr,
4111 &dev_attr_sess_discovery_logout.attr,
4112 &dev_attr_sess_bidi_chap.attr,
4113 &dev_attr_sess_discovery_auth_optional.attr,
4114 &dev_attr_sess_def_time2wait.attr,
4115 &dev_attr_sess_def_time2retain.attr,
4116 &dev_attr_sess_isid.attr,
4117 &dev_attr_sess_tsid.attr,
4118 &dev_attr_sess_def_taskmgmt_tmo.attr,
4119 &dev_attr_sess_discovery_parent_idx.attr,
4120 &dev_attr_sess_discovery_parent_type.attr,
4121 NULL,
4122 };
4123
4124 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4125 struct attribute *attr, int i)
4126 {
4127 struct device *cdev = container_of(kobj, struct device, kobj);
4128 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4129 struct iscsi_transport *t = session->transport;
4130 int param;
4131
4132 if (attr == &dev_attr_sess_initial_r2t.attr)
4133 param = ISCSI_PARAM_INITIAL_R2T_EN;
4134 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4135 param = ISCSI_PARAM_MAX_R2T;
4136 else if (attr == &dev_attr_sess_immediate_data.attr)
4137 param = ISCSI_PARAM_IMM_DATA_EN;
4138 else if (attr == &dev_attr_sess_first_burst_len.attr)
4139 param = ISCSI_PARAM_FIRST_BURST;
4140 else if (attr == &dev_attr_sess_max_burst_len.attr)
4141 param = ISCSI_PARAM_MAX_BURST;
4142 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4143 param = ISCSI_PARAM_PDU_INORDER_EN;
4144 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4145 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4146 else if (attr == &dev_attr_sess_erl.attr)
4147 param = ISCSI_PARAM_ERL;
4148 else if (attr == &dev_attr_sess_targetname.attr)
4149 param = ISCSI_PARAM_TARGET_NAME;
4150 else if (attr == &dev_attr_sess_tpgt.attr)
4151 param = ISCSI_PARAM_TPGT;
4152 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4153 param = ISCSI_PARAM_CHAP_IN_IDX;
4154 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4155 param = ISCSI_PARAM_CHAP_OUT_IDX;
4156 else if (attr == &dev_attr_sess_password.attr)
4157 param = ISCSI_PARAM_USERNAME;
4158 else if (attr == &dev_attr_sess_password_in.attr)
4159 param = ISCSI_PARAM_USERNAME_IN;
4160 else if (attr == &dev_attr_sess_username.attr)
4161 param = ISCSI_PARAM_PASSWORD;
4162 else if (attr == &dev_attr_sess_username_in.attr)
4163 param = ISCSI_PARAM_PASSWORD_IN;
4164 else if (attr == &dev_attr_sess_fast_abort.attr)
4165 param = ISCSI_PARAM_FAST_ABORT;
4166 else if (attr == &dev_attr_sess_abort_tmo.attr)
4167 param = ISCSI_PARAM_ABORT_TMO;
4168 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4169 param = ISCSI_PARAM_LU_RESET_TMO;
4170 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4171 param = ISCSI_PARAM_TGT_RESET_TMO;
4172 else if (attr == &dev_attr_sess_ifacename.attr)
4173 param = ISCSI_PARAM_IFACE_NAME;
4174 else if (attr == &dev_attr_sess_initiatorname.attr)
4175 param = ISCSI_PARAM_INITIATOR_NAME;
4176 else if (attr == &dev_attr_sess_targetalias.attr)
4177 param = ISCSI_PARAM_TARGET_ALIAS;
4178 else if (attr == &dev_attr_sess_boot_root.attr)
4179 param = ISCSI_PARAM_BOOT_ROOT;
4180 else if (attr == &dev_attr_sess_boot_nic.attr)
4181 param = ISCSI_PARAM_BOOT_NIC;
4182 else if (attr == &dev_attr_sess_boot_target.attr)
4183 param = ISCSI_PARAM_BOOT_TARGET;
4184 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4185 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4186 else if (attr == &dev_attr_sess_discovery_session.attr)
4187 param = ISCSI_PARAM_DISCOVERY_SESS;
4188 else if (attr == &dev_attr_sess_portal_type.attr)
4189 param = ISCSI_PARAM_PORTAL_TYPE;
4190 else if (attr == &dev_attr_sess_chap_auth.attr)
4191 param = ISCSI_PARAM_CHAP_AUTH_EN;
4192 else if (attr == &dev_attr_sess_discovery_logout.attr)
4193 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4194 else if (attr == &dev_attr_sess_bidi_chap.attr)
4195 param = ISCSI_PARAM_BIDI_CHAP_EN;
4196 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4197 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4198 else if (attr == &dev_attr_sess_def_time2wait.attr)
4199 param = ISCSI_PARAM_DEF_TIME2WAIT;
4200 else if (attr == &dev_attr_sess_def_time2retain.attr)
4201 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4202 else if (attr == &dev_attr_sess_isid.attr)
4203 param = ISCSI_PARAM_ISID;
4204 else if (attr == &dev_attr_sess_tsid.attr)
4205 param = ISCSI_PARAM_TSID;
4206 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4207 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4208 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4209 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4210 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4211 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4212 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4213 return S_IRUGO | S_IWUSR;
4214 else if (attr == &dev_attr_priv_sess_state.attr)
4215 return S_IRUGO;
4216 else if (attr == &dev_attr_priv_sess_creator.attr)
4217 return S_IRUGO;
4218 else if (attr == &dev_attr_priv_sess_target_id.attr)
4219 return S_IRUGO;
4220 else {
4221 WARN_ONCE(1, "Invalid session attr");
4222 return 0;
4223 }
4224
4225 return t->attr_is_visible(ISCSI_PARAM, param);
4226 }
4227
4228 static struct attribute_group iscsi_session_group = {
4229 .attrs = iscsi_session_attrs,
4230 .is_visible = iscsi_session_attr_is_visible,
4231 };
4232
4233 /*
4234 * iSCSI host attrs
4235 */
4236 #define iscsi_host_attr_show(param) \
4237 static ssize_t \
4238 show_host_param_##param(struct device *dev, \
4239 struct device_attribute *attr, char *buf) \
4240 { \
4241 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4242 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4243 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4244 }
4245
4246 #define iscsi_host_attr(field, param) \
4247 iscsi_host_attr_show(param) \
4248 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4249 NULL);
4250
4251 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4252 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4253 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4254 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4255 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4256 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4257
4258 static struct attribute *iscsi_host_attrs[] = {
4259 &dev_attr_host_netdev.attr,
4260 &dev_attr_host_hwaddress.attr,
4261 &dev_attr_host_ipaddress.attr,
4262 &dev_attr_host_initiatorname.attr,
4263 &dev_attr_host_port_state.attr,
4264 &dev_attr_host_port_speed.attr,
4265 NULL,
4266 };
4267
4268 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4269 struct attribute *attr, int i)
4270 {
4271 struct device *cdev = container_of(kobj, struct device, kobj);
4272 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4273 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4274 int param;
4275
4276 if (attr == &dev_attr_host_netdev.attr)
4277 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4278 else if (attr == &dev_attr_host_hwaddress.attr)
4279 param = ISCSI_HOST_PARAM_HWADDRESS;
4280 else if (attr == &dev_attr_host_ipaddress.attr)
4281 param = ISCSI_HOST_PARAM_IPADDRESS;
4282 else if (attr == &dev_attr_host_initiatorname.attr)
4283 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4284 else if (attr == &dev_attr_host_port_state.attr)
4285 param = ISCSI_HOST_PARAM_PORT_STATE;
4286 else if (attr == &dev_attr_host_port_speed.attr)
4287 param = ISCSI_HOST_PARAM_PORT_SPEED;
4288 else {
4289 WARN_ONCE(1, "Invalid host attr");
4290 return 0;
4291 }
4292
4293 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4294 }
4295
4296 static struct attribute_group iscsi_host_group = {
4297 .attrs = iscsi_host_attrs,
4298 .is_visible = iscsi_host_attr_is_visible,
4299 };
4300
4301 /* convert iscsi_port_speed values to ascii string name */
4302 static const struct {
4303 enum iscsi_port_speed value;
4304 char *name;
4305 } iscsi_port_speed_names[] = {
4306 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4307 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4308 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4309 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4310 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4311 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4312 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4313 };
4314
4315 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4316 {
4317 int i;
4318 char *speed = "Unknown!";
4319 struct iscsi_cls_host *ihost = shost->shost_data;
4320 uint32_t port_speed = ihost->port_speed;
4321
4322 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4323 if (iscsi_port_speed_names[i].value & port_speed) {
4324 speed = iscsi_port_speed_names[i].name;
4325 break;
4326 }
4327 }
4328 return speed;
4329 }
4330 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4331
4332 /* convert iscsi_port_state values to ascii string name */
4333 static const struct {
4334 enum iscsi_port_state value;
4335 char *name;
4336 } iscsi_port_state_names[] = {
4337 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4338 {ISCSI_PORT_STATE_UP, "LINK UP" },
4339 };
4340
4341 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4342 {
4343 int i;
4344 char *state = "Unknown!";
4345 struct iscsi_cls_host *ihost = shost->shost_data;
4346 uint32_t port_state = ihost->port_state;
4347
4348 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4349 if (iscsi_port_state_names[i].value & port_state) {
4350 state = iscsi_port_state_names[i].name;
4351 break;
4352 }
4353 }
4354 return state;
4355 }
4356 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4357
4358 static int iscsi_session_match(struct attribute_container *cont,
4359 struct device *dev)
4360 {
4361 struct iscsi_cls_session *session;
4362 struct Scsi_Host *shost;
4363 struct iscsi_internal *priv;
4364
4365 if (!iscsi_is_session_dev(dev))
4366 return 0;
4367
4368 session = iscsi_dev_to_session(dev);
4369 shost = iscsi_session_to_shost(session);
4370 if (!shost->transportt)
4371 return 0;
4372
4373 priv = to_iscsi_internal(shost->transportt);
4374 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4375 return 0;
4376
4377 return &priv->session_cont.ac == cont;
4378 }
4379
4380 static int iscsi_conn_match(struct attribute_container *cont,
4381 struct device *dev)
4382 {
4383 struct iscsi_cls_session *session;
4384 struct iscsi_cls_conn *conn;
4385 struct Scsi_Host *shost;
4386 struct iscsi_internal *priv;
4387
4388 if (!iscsi_is_conn_dev(dev))
4389 return 0;
4390
4391 conn = iscsi_dev_to_conn(dev);
4392 session = iscsi_dev_to_session(conn->dev.parent);
4393 shost = iscsi_session_to_shost(session);
4394
4395 if (!shost->transportt)
4396 return 0;
4397
4398 priv = to_iscsi_internal(shost->transportt);
4399 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4400 return 0;
4401
4402 return &priv->conn_cont.ac == cont;
4403 }
4404
4405 static int iscsi_host_match(struct attribute_container *cont,
4406 struct device *dev)
4407 {
4408 struct Scsi_Host *shost;
4409 struct iscsi_internal *priv;
4410
4411 if (!scsi_is_host_device(dev))
4412 return 0;
4413
4414 shost = dev_to_shost(dev);
4415 if (!shost->transportt ||
4416 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4417 return 0;
4418
4419 priv = to_iscsi_internal(shost->transportt);
4420 return &priv->t.host_attrs.ac == cont;
4421 }
4422
4423 struct scsi_transport_template *
4424 iscsi_register_transport(struct iscsi_transport *tt)
4425 {
4426 struct iscsi_internal *priv;
4427 unsigned long flags;
4428 int err;
4429
4430 BUG_ON(!tt);
4431
4432 priv = iscsi_if_transport_lookup(tt);
4433 if (priv)
4434 return NULL;
4435
4436 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4437 if (!priv)
4438 return NULL;
4439 INIT_LIST_HEAD(&priv->list);
4440 priv->iscsi_transport = tt;
4441 priv->t.user_scan = iscsi_user_scan;
4442 priv->t.create_work_queue = 1;
4443
4444 priv->dev.class = &iscsi_transport_class;
4445 dev_set_name(&priv->dev, "%s", tt->name);
4446 err = device_register(&priv->dev);
4447 if (err)
4448 goto free_priv;
4449
4450 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4451 if (err)
4452 goto unregister_dev;
4453
4454 /* host parameters */
4455 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4456 priv->t.host_attrs.ac.match = iscsi_host_match;
4457 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4458 priv->t.host_size = sizeof(struct iscsi_cls_host);
4459 transport_container_register(&priv->t.host_attrs);
4460
4461 /* connection parameters */
4462 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4463 priv->conn_cont.ac.match = iscsi_conn_match;
4464 priv->conn_cont.ac.grp = &iscsi_conn_group;
4465 transport_container_register(&priv->conn_cont);
4466
4467 /* session parameters */
4468 priv->session_cont.ac.class = &iscsi_session_class.class;
4469 priv->session_cont.ac.match = iscsi_session_match;
4470 priv->session_cont.ac.grp = &iscsi_session_group;
4471 transport_container_register(&priv->session_cont);
4472
4473 spin_lock_irqsave(&iscsi_transport_lock, flags);
4474 list_add(&priv->list, &iscsi_transports);
4475 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4476
4477 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4478 return &priv->t;
4479
4480 unregister_dev:
4481 device_unregister(&priv->dev);
4482 return NULL;
4483 free_priv:
4484 kfree(priv);
4485 return NULL;
4486 }
4487 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4488
4489 int iscsi_unregister_transport(struct iscsi_transport *tt)
4490 {
4491 struct iscsi_internal *priv;
4492 unsigned long flags;
4493
4494 BUG_ON(!tt);
4495
4496 mutex_lock(&rx_queue_mutex);
4497
4498 priv = iscsi_if_transport_lookup(tt);
4499 BUG_ON (!priv);
4500
4501 spin_lock_irqsave(&iscsi_transport_lock, flags);
4502 list_del(&priv->list);
4503 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4504
4505 transport_container_unregister(&priv->conn_cont);
4506 transport_container_unregister(&priv->session_cont);
4507 transport_container_unregister(&priv->t.host_attrs);
4508
4509 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4510 device_unregister(&priv->dev);
4511 mutex_unlock(&rx_queue_mutex);
4512
4513 return 0;
4514 }
4515 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4516
4517 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4518 struct device *dev, const char *fmt, ...)
4519 {
4520 struct va_format vaf;
4521 va_list args;
4522
4523 va_start(args, fmt);
4524 vaf.fmt = fmt;
4525 vaf.va = &args;
4526 trace(dev, &vaf);
4527 va_end(args);
4528 }
4529 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4530
4531 static __init int iscsi_transport_init(void)
4532 {
4533 int err;
4534 struct netlink_kernel_cfg cfg = {
4535 .groups = 1,
4536 .input = iscsi_if_rx,
4537 };
4538 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4539 ISCSI_TRANSPORT_VERSION);
4540
4541 atomic_set(&iscsi_session_nr, 0);
4542
4543 err = class_register(&iscsi_transport_class);
4544 if (err)
4545 return err;
4546
4547 err = class_register(&iscsi_endpoint_class);
4548 if (err)
4549 goto unregister_transport_class;
4550
4551 err = class_register(&iscsi_iface_class);
4552 if (err)
4553 goto unregister_endpoint_class;
4554
4555 err = transport_class_register(&iscsi_host_class);
4556 if (err)
4557 goto unregister_iface_class;
4558
4559 err = transport_class_register(&iscsi_connection_class);
4560 if (err)
4561 goto unregister_host_class;
4562
4563 err = transport_class_register(&iscsi_session_class);
4564 if (err)
4565 goto unregister_conn_class;
4566
4567 err = bus_register(&iscsi_flashnode_bus);
4568 if (err)
4569 goto unregister_session_class;
4570
4571 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4572 if (!nls) {
4573 err = -ENOBUFS;
4574 goto unregister_flashnode_bus;
4575 }
4576
4577 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4578 if (!iscsi_eh_timer_workq) {
4579 err = -ENOMEM;
4580 goto release_nls;
4581 }
4582
4583 return 0;
4584
4585 release_nls:
4586 netlink_kernel_release(nls);
4587 unregister_flashnode_bus:
4588 bus_unregister(&iscsi_flashnode_bus);
4589 unregister_session_class:
4590 transport_class_unregister(&iscsi_session_class);
4591 unregister_conn_class:
4592 transport_class_unregister(&iscsi_connection_class);
4593 unregister_host_class:
4594 transport_class_unregister(&iscsi_host_class);
4595 unregister_iface_class:
4596 class_unregister(&iscsi_iface_class);
4597 unregister_endpoint_class:
4598 class_unregister(&iscsi_endpoint_class);
4599 unregister_transport_class:
4600 class_unregister(&iscsi_transport_class);
4601 return err;
4602 }
4603
4604 static void __exit iscsi_transport_exit(void)
4605 {
4606 destroy_workqueue(iscsi_eh_timer_workq);
4607 netlink_kernel_release(nls);
4608 bus_unregister(&iscsi_flashnode_bus);
4609 transport_class_unregister(&iscsi_connection_class);
4610 transport_class_unregister(&iscsi_session_class);
4611 transport_class_unregister(&iscsi_host_class);
4612 class_unregister(&iscsi_endpoint_class);
4613 class_unregister(&iscsi_iface_class);
4614 class_unregister(&iscsi_transport_class);
4615 }
4616
4617 module_init(iscsi_transport_init);
4618 module_exit(iscsi_transport_exit);
4619
4620 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4621 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4622 "Alex Aizman <itn780@yahoo.com>");
4623 MODULE_DESCRIPTION("iSCSI Transport Interface");
4624 MODULE_LICENSE("GPL");
4625 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4626 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git