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Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
[deliverable/linux.git] / drivers / scsi / scsi_transport_iscsi.c
1 /*
2 * iSCSI transport class definitions
3 *
4 * Copyright (C) IBM Corporation, 2004
5 * Copyright (C) Mike Christie, 2004 - 2005
6 * Copyright (C) Dmitry Yusupov, 2004 - 2005
7 * Copyright (C) Alex Aizman, 2004 - 2005
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23 #include <linux/module.h>
24 #include <linux/mutex.h>
25 #include <linux/slab.h>
26 #include <linux/bsg-lib.h>
27 #include <linux/idr.h>
28 #include <net/tcp.h>
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_iscsi.h>
34 #include <scsi/iscsi_if.h>
35 #include <scsi/scsi_cmnd.h>
36 #include <scsi/scsi_bsg_iscsi.h>
37
38 #define ISCSI_TRANSPORT_VERSION "2.0-870"
39
40 static int dbg_session;
41 module_param_named(debug_session, dbg_session, int,
42 S_IRUGO | S_IWUSR);
43 MODULE_PARM_DESC(debug_session,
44 "Turn on debugging for sessions in scsi_transport_iscsi "
45 "module. Set to 1 to turn on, and zero to turn off. Default "
46 "is off.");
47
48 static int dbg_conn;
49 module_param_named(debug_conn, dbg_conn, int,
50 S_IRUGO | S_IWUSR);
51 MODULE_PARM_DESC(debug_conn,
52 "Turn on debugging for connections in scsi_transport_iscsi "
53 "module. Set to 1 to turn on, and zero to turn off. Default "
54 "is off.");
55
56 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
57 do { \
58 if (dbg_session) \
59 iscsi_cls_session_printk(KERN_INFO, _session, \
60 "%s: " dbg_fmt, \
61 __func__, ##arg); \
62 } while (0);
63
64 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
65 do { \
66 if (dbg_conn) \
67 iscsi_cls_conn_printk(KERN_INFO, _conn, \
68 "%s: " dbg_fmt, \
69 __func__, ##arg); \
70 } while (0);
71
72 struct iscsi_internal {
73 struct scsi_transport_template t;
74 struct iscsi_transport *iscsi_transport;
75 struct list_head list;
76 struct device dev;
77
78 struct transport_container conn_cont;
79 struct transport_container session_cont;
80 };
81
82 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
83 static struct workqueue_struct *iscsi_eh_timer_workq;
84
85 static DEFINE_IDA(iscsi_sess_ida);
86 /*
87 * list of registered transports and lock that must
88 * be held while accessing list. The iscsi_transport_lock must
89 * be acquired after the rx_queue_mutex.
90 */
91 static LIST_HEAD(iscsi_transports);
92 static DEFINE_SPINLOCK(iscsi_transport_lock);
93
94 #define to_iscsi_internal(tmpl) \
95 container_of(tmpl, struct iscsi_internal, t)
96
97 #define dev_to_iscsi_internal(_dev) \
98 container_of(_dev, struct iscsi_internal, dev)
99
100 static void iscsi_transport_release(struct device *dev)
101 {
102 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
103 kfree(priv);
104 }
105
106 /*
107 * iscsi_transport_class represents the iscsi_transports that are
108 * registered.
109 */
110 static struct class iscsi_transport_class = {
111 .name = "iscsi_transport",
112 .dev_release = iscsi_transport_release,
113 };
114
115 static ssize_t
116 show_transport_handle(struct device *dev, struct device_attribute *attr,
117 char *buf)
118 {
119 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
120 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
121 }
122 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
123
124 #define show_transport_attr(name, format) \
125 static ssize_t \
126 show_transport_##name(struct device *dev, \
127 struct device_attribute *attr,char *buf) \
128 { \
129 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
130 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
131 } \
132 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
133
134 show_transport_attr(caps, "0x%x");
135
136 static struct attribute *iscsi_transport_attrs[] = {
137 &dev_attr_handle.attr,
138 &dev_attr_caps.attr,
139 NULL,
140 };
141
142 static struct attribute_group iscsi_transport_group = {
143 .attrs = iscsi_transport_attrs,
144 };
145
146 /*
147 * iSCSI endpoint attrs
148 */
149 #define iscsi_dev_to_endpoint(_dev) \
150 container_of(_dev, struct iscsi_endpoint, dev)
151
152 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
153 struct device_attribute dev_attr_##_prefix##_##_name = \
154 __ATTR(_name,_mode,_show,_store)
155
156 static void iscsi_endpoint_release(struct device *dev)
157 {
158 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
159 kfree(ep);
160 }
161
162 static struct class iscsi_endpoint_class = {
163 .name = "iscsi_endpoint",
164 .dev_release = iscsi_endpoint_release,
165 };
166
167 static ssize_t
168 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
169 {
170 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
171 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
172 }
173 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
174
175 static struct attribute *iscsi_endpoint_attrs[] = {
176 &dev_attr_ep_handle.attr,
177 NULL,
178 };
179
180 static struct attribute_group iscsi_endpoint_group = {
181 .attrs = iscsi_endpoint_attrs,
182 };
183
184 #define ISCSI_MAX_EPID -1
185
186 static int iscsi_match_epid(struct device *dev, const void *data)
187 {
188 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
189 const uint64_t *epid = data;
190
191 return *epid == ep->id;
192 }
193
194 struct iscsi_endpoint *
195 iscsi_create_endpoint(int dd_size)
196 {
197 struct device *dev;
198 struct iscsi_endpoint *ep;
199 uint64_t id;
200 int err;
201
202 for (id = 1; id < ISCSI_MAX_EPID; id++) {
203 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
204 iscsi_match_epid);
205 if (!dev)
206 break;
207 else
208 put_device(dev);
209 }
210 if (id == ISCSI_MAX_EPID) {
211 printk(KERN_ERR "Too many connections. Max supported %u\n",
212 ISCSI_MAX_EPID - 1);
213 return NULL;
214 }
215
216 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
217 if (!ep)
218 return NULL;
219
220 ep->id = id;
221 ep->dev.class = &iscsi_endpoint_class;
222 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
223 err = device_register(&ep->dev);
224 if (err)
225 goto free_ep;
226
227 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
228 if (err)
229 goto unregister_dev;
230
231 if (dd_size)
232 ep->dd_data = &ep[1];
233 return ep;
234
235 unregister_dev:
236 device_unregister(&ep->dev);
237 return NULL;
238
239 free_ep:
240 kfree(ep);
241 return NULL;
242 }
243 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
244
245 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
246 {
247 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
248 device_unregister(&ep->dev);
249 }
250 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
251
252 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
253 {
254 struct iscsi_endpoint *ep;
255 struct device *dev;
256
257 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
258 iscsi_match_epid);
259 if (!dev)
260 return NULL;
261
262 ep = iscsi_dev_to_endpoint(dev);
263 /*
264 * we can drop this now because the interface will prevent
265 * removals and lookups from racing.
266 */
267 put_device(dev);
268 return ep;
269 }
270 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
271
272 /*
273 * Interface to display network param to sysfs
274 */
275
276 static void iscsi_iface_release(struct device *dev)
277 {
278 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
279 struct device *parent = iface->dev.parent;
280
281 kfree(iface);
282 put_device(parent);
283 }
284
285
286 static struct class iscsi_iface_class = {
287 .name = "iscsi_iface",
288 .dev_release = iscsi_iface_release,
289 };
290
291 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
292 struct device_attribute dev_attr_##_prefix##_##_name = \
293 __ATTR(_name, _mode, _show, _store)
294
295 /* iface attrs show */
296 #define iscsi_iface_attr_show(type, name, param_type, param) \
297 static ssize_t \
298 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
299 char *buf) \
300 { \
301 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
302 struct iscsi_transport *t = iface->transport; \
303 return t->get_iface_param(iface, param_type, param, buf); \
304 } \
305
306 #define iscsi_iface_net_attr(type, name, param) \
307 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
308 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
309
310 #define iscsi_iface_attr(type, name, param) \
311 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
312 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
313
314 /* generic read only ipv4 attribute */
315 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
316 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
317 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
318 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
319 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
320 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
321 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
322 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
323 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
324 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
325 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
326 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
327 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
328 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
329 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
330 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
331 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
332 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
333 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
334 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
335 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
336 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
337 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
338 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
339 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
340 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
341 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
342 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
343 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
344
345 /* generic read only ipv6 attribute */
346 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
347 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
348 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
349 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
350 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
351 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
352 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
353 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
354 iscsi_iface_net_attr(ipv6_iface, link_local_state,
355 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
356 iscsi_iface_net_attr(ipv6_iface, router_state,
357 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
358 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
359 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
360 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
361 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
362 iscsi_iface_net_attr(ipv6_iface, traffic_class,
363 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
364 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
365 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
366 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
367 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
368 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
369 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
370 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
371 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
372 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
373 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
374 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
375
376 /* common read only iface attribute */
377 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
378 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
379 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
380 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
381 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
382 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
383 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
384 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
385 iscsi_iface_net_attr(iface, tcp_nagle_disable,
386 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
387 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
388 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
389 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
390 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
391 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
392 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
393
394 /* common iscsi specific settings attributes */
395 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
396 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
397 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
398 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
399 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
400 iscsi_iface_attr(iface, data_seq_in_order,
401 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
402 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
403 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
404 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
405 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
406 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
407 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
408 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
409 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
410 iscsi_iface_attr(iface, discovery_auth_optional,
411 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
412 iscsi_iface_attr(iface, discovery_logout,
413 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
414 iscsi_iface_attr(iface, strict_login_comp_en,
415 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
416 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
417
418 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
419 struct attribute *attr, int i)
420 {
421 struct device *dev = container_of(kobj, struct device, kobj);
422 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
423 struct iscsi_transport *t = iface->transport;
424 int param;
425 int param_type;
426
427 if (attr == &dev_attr_iface_enabled.attr)
428 param = ISCSI_NET_PARAM_IFACE_ENABLE;
429 else if (attr == &dev_attr_iface_vlan_id.attr)
430 param = ISCSI_NET_PARAM_VLAN_ID;
431 else if (attr == &dev_attr_iface_vlan_priority.attr)
432 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
433 else if (attr == &dev_attr_iface_vlan_enabled.attr)
434 param = ISCSI_NET_PARAM_VLAN_ENABLED;
435 else if (attr == &dev_attr_iface_mtu.attr)
436 param = ISCSI_NET_PARAM_MTU;
437 else if (attr == &dev_attr_iface_port.attr)
438 param = ISCSI_NET_PARAM_PORT;
439 else if (attr == &dev_attr_iface_ipaddress_state.attr)
440 param = ISCSI_NET_PARAM_IPADDR_STATE;
441 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
442 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
443 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
444 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
445 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
446 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
447 else if (attr == &dev_attr_iface_tcp_wsf.attr)
448 param = ISCSI_NET_PARAM_TCP_WSF;
449 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
450 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
451 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
452 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
453 else if (attr == &dev_attr_iface_cache_id.attr)
454 param = ISCSI_NET_PARAM_CACHE_ID;
455 else if (attr == &dev_attr_iface_redirect_en.attr)
456 param = ISCSI_NET_PARAM_REDIRECT_EN;
457 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
458 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
459 else if (attr == &dev_attr_iface_header_digest.attr)
460 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
461 else if (attr == &dev_attr_iface_data_digest.attr)
462 param = ISCSI_IFACE_PARAM_DATADGST_EN;
463 else if (attr == &dev_attr_iface_immediate_data.attr)
464 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
465 else if (attr == &dev_attr_iface_initial_r2t.attr)
466 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
467 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
468 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
469 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
470 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
471 else if (attr == &dev_attr_iface_erl.attr)
472 param = ISCSI_IFACE_PARAM_ERL;
473 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
474 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
475 else if (attr == &dev_attr_iface_first_burst_len.attr)
476 param = ISCSI_IFACE_PARAM_FIRST_BURST;
477 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
478 param = ISCSI_IFACE_PARAM_MAX_R2T;
479 else if (attr == &dev_attr_iface_max_burst_len.attr)
480 param = ISCSI_IFACE_PARAM_MAX_BURST;
481 else if (attr == &dev_attr_iface_chap_auth.attr)
482 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
483 else if (attr == &dev_attr_iface_bidi_chap.attr)
484 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
485 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
486 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
487 else if (attr == &dev_attr_iface_discovery_logout.attr)
488 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
489 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
490 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
491 else if (attr == &dev_attr_iface_initiator_name.attr)
492 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
493 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
494 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
495 param = ISCSI_NET_PARAM_IPV4_ADDR;
496 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
497 param = ISCSI_NET_PARAM_IPV4_GW;
498 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
499 param = ISCSI_NET_PARAM_IPV4_SUBNET;
500 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
501 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
502 else if (attr ==
503 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
504 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
505 else if (attr ==
506 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
507 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
508 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
509 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
510 else if (attr == &dev_attr_ipv4_iface_tos.attr)
511 param = ISCSI_NET_PARAM_IPV4_TOS;
512 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
513 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
514 else if (attr ==
515 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
516 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
517 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
518 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
519 else if (attr ==
520 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
521 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
522 else if (attr ==
523 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
524 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
525 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
526 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
527 else if (attr ==
528 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
529 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
530 else if (attr ==
531 &dev_attr_ipv4_iface_fragment_disable.attr)
532 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
533 else if (attr ==
534 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
535 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
536 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
537 param = ISCSI_NET_PARAM_IPV4_TTL;
538 else
539 return 0;
540 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
541 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
542 param = ISCSI_NET_PARAM_IPV6_ADDR;
543 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
544 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
545 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
546 param = ISCSI_NET_PARAM_IPV6_ROUTER;
547 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
548 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
549 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
550 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
551 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
552 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
553 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
554 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
555 else if (attr ==
556 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
557 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
558 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
559 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
560 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
561 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
562 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
563 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
564 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
565 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
566 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
567 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
568 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
569 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
570 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
571 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
572 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
573 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
574 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
575 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
576 else
577 return 0;
578 } else {
579 WARN_ONCE(1, "Invalid iface attr");
580 return 0;
581 }
582
583 switch (param) {
584 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
585 case ISCSI_IFACE_PARAM_HDRDGST_EN:
586 case ISCSI_IFACE_PARAM_DATADGST_EN:
587 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
588 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
589 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
590 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
591 case ISCSI_IFACE_PARAM_ERL:
592 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
593 case ISCSI_IFACE_PARAM_FIRST_BURST:
594 case ISCSI_IFACE_PARAM_MAX_R2T:
595 case ISCSI_IFACE_PARAM_MAX_BURST:
596 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
597 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
598 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
599 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
600 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
601 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
602 param_type = ISCSI_IFACE_PARAM;
603 break;
604 default:
605 param_type = ISCSI_NET_PARAM;
606 }
607
608 return t->attr_is_visible(param_type, param);
609 }
610
611 static struct attribute *iscsi_iface_attrs[] = {
612 &dev_attr_iface_enabled.attr,
613 &dev_attr_iface_vlan_id.attr,
614 &dev_attr_iface_vlan_priority.attr,
615 &dev_attr_iface_vlan_enabled.attr,
616 &dev_attr_ipv4_iface_ipaddress.attr,
617 &dev_attr_ipv4_iface_gateway.attr,
618 &dev_attr_ipv4_iface_subnet.attr,
619 &dev_attr_ipv4_iface_bootproto.attr,
620 &dev_attr_ipv6_iface_ipaddress.attr,
621 &dev_attr_ipv6_iface_link_local_addr.attr,
622 &dev_attr_ipv6_iface_router_addr.attr,
623 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
624 &dev_attr_ipv6_iface_link_local_autocfg.attr,
625 &dev_attr_iface_mtu.attr,
626 &dev_attr_iface_port.attr,
627 &dev_attr_iface_ipaddress_state.attr,
628 &dev_attr_iface_delayed_ack_en.attr,
629 &dev_attr_iface_tcp_nagle_disable.attr,
630 &dev_attr_iface_tcp_wsf_disable.attr,
631 &dev_attr_iface_tcp_wsf.attr,
632 &dev_attr_iface_tcp_timer_scale.attr,
633 &dev_attr_iface_tcp_timestamp_en.attr,
634 &dev_attr_iface_cache_id.attr,
635 &dev_attr_iface_redirect_en.attr,
636 &dev_attr_iface_def_taskmgmt_tmo.attr,
637 &dev_attr_iface_header_digest.attr,
638 &dev_attr_iface_data_digest.attr,
639 &dev_attr_iface_immediate_data.attr,
640 &dev_attr_iface_initial_r2t.attr,
641 &dev_attr_iface_data_seq_in_order.attr,
642 &dev_attr_iface_data_pdu_in_order.attr,
643 &dev_attr_iface_erl.attr,
644 &dev_attr_iface_max_recv_dlength.attr,
645 &dev_attr_iface_first_burst_len.attr,
646 &dev_attr_iface_max_outstanding_r2t.attr,
647 &dev_attr_iface_max_burst_len.attr,
648 &dev_attr_iface_chap_auth.attr,
649 &dev_attr_iface_bidi_chap.attr,
650 &dev_attr_iface_discovery_auth_optional.attr,
651 &dev_attr_iface_discovery_logout.attr,
652 &dev_attr_iface_strict_login_comp_en.attr,
653 &dev_attr_iface_initiator_name.attr,
654 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
655 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
656 &dev_attr_ipv4_iface_tos_en.attr,
657 &dev_attr_ipv4_iface_tos.attr,
658 &dev_attr_ipv4_iface_grat_arp_en.attr,
659 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
660 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
661 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
662 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
663 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
664 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
665 &dev_attr_ipv4_iface_fragment_disable.attr,
666 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
667 &dev_attr_ipv4_iface_ttl.attr,
668 &dev_attr_ipv6_iface_link_local_state.attr,
669 &dev_attr_ipv6_iface_router_state.attr,
670 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
671 &dev_attr_ipv6_iface_mld_en.attr,
672 &dev_attr_ipv6_iface_flow_label.attr,
673 &dev_attr_ipv6_iface_traffic_class.attr,
674 &dev_attr_ipv6_iface_hop_limit.attr,
675 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
676 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
677 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
678 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
679 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
680 NULL,
681 };
682
683 static struct attribute_group iscsi_iface_group = {
684 .attrs = iscsi_iface_attrs,
685 .is_visible = iscsi_iface_attr_is_visible,
686 };
687
688 /* convert iscsi_ipaddress_state values to ascii string name */
689 static const struct {
690 enum iscsi_ipaddress_state value;
691 char *name;
692 } iscsi_ipaddress_state_names[] = {
693 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
694 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
695 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
696 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
697 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
698 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
699 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
700 };
701
702 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
703 {
704 int i;
705 char *state = NULL;
706
707 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
708 if (iscsi_ipaddress_state_names[i].value == port_state) {
709 state = iscsi_ipaddress_state_names[i].name;
710 break;
711 }
712 }
713 return state;
714 }
715 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
716
717 /* convert iscsi_router_state values to ascii string name */
718 static const struct {
719 enum iscsi_router_state value;
720 char *name;
721 } iscsi_router_state_names[] = {
722 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
723 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
724 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
725 {ISCSI_ROUTER_STATE_STALE, "Stale" },
726 };
727
728 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
729 {
730 int i;
731 char *state = NULL;
732
733 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
734 if (iscsi_router_state_names[i].value == router_state) {
735 state = iscsi_router_state_names[i].name;
736 break;
737 }
738 }
739 return state;
740 }
741 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
742
743 struct iscsi_iface *
744 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
745 uint32_t iface_type, uint32_t iface_num, int dd_size)
746 {
747 struct iscsi_iface *iface;
748 int err;
749
750 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
751 if (!iface)
752 return NULL;
753
754 iface->transport = transport;
755 iface->iface_type = iface_type;
756 iface->iface_num = iface_num;
757 iface->dev.release = iscsi_iface_release;
758 iface->dev.class = &iscsi_iface_class;
759 /* parent reference released in iscsi_iface_release */
760 iface->dev.parent = get_device(&shost->shost_gendev);
761 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
762 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
763 iface_num);
764 else
765 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
766 iface_num);
767
768 err = device_register(&iface->dev);
769 if (err)
770 goto free_iface;
771
772 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
773 if (err)
774 goto unreg_iface;
775
776 if (dd_size)
777 iface->dd_data = &iface[1];
778 return iface;
779
780 unreg_iface:
781 device_unregister(&iface->dev);
782 return NULL;
783
784 free_iface:
785 put_device(iface->dev.parent);
786 kfree(iface);
787 return NULL;
788 }
789 EXPORT_SYMBOL_GPL(iscsi_create_iface);
790
791 void iscsi_destroy_iface(struct iscsi_iface *iface)
792 {
793 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
794 device_unregister(&iface->dev);
795 }
796 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
797
798 /*
799 * Interface to display flash node params to sysfs
800 */
801
802 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
803 struct device_attribute dev_attr_##_prefix##_##_name = \
804 __ATTR(_name, _mode, _show, _store)
805
806 /* flash node session attrs show */
807 #define iscsi_flashnode_sess_attr_show(type, name, param) \
808 static ssize_t \
809 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
810 char *buf) \
811 { \
812 struct iscsi_bus_flash_session *fnode_sess = \
813 iscsi_dev_to_flash_session(dev);\
814 struct iscsi_transport *t = fnode_sess->transport; \
815 return t->get_flashnode_param(fnode_sess, param, buf); \
816 } \
817
818
819 #define iscsi_flashnode_sess_attr(type, name, param) \
820 iscsi_flashnode_sess_attr_show(type, name, param) \
821 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
822 show_##type##_##name, NULL);
823
824 /* Flash node session attributes */
825
826 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
827 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
828 iscsi_flashnode_sess_attr(fnode, discovery_session,
829 ISCSI_FLASHNODE_DISCOVERY_SESS);
830 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
831 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
832 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
833 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
834 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
835 ISCSI_FLASHNODE_DATASEQ_INORDER);
836 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
837 ISCSI_FLASHNODE_PDU_INORDER);
838 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
839 iscsi_flashnode_sess_attr(fnode, discovery_logout,
840 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
841 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
842 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
843 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
844 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
845 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
846 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
847 iscsi_flashnode_sess_attr(fnode, def_time2retain,
848 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
849 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
850 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
851 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
852 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
853 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
854 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
855 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
856 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
857 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
858 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
859 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
860 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
861 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
862 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
863 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
864 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
865 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
866 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
867 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
868 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
869
870 static struct attribute *iscsi_flashnode_sess_attrs[] = {
871 &dev_attr_fnode_auto_snd_tgt_disable.attr,
872 &dev_attr_fnode_discovery_session.attr,
873 &dev_attr_fnode_portal_type.attr,
874 &dev_attr_fnode_entry_enable.attr,
875 &dev_attr_fnode_immediate_data.attr,
876 &dev_attr_fnode_initial_r2t.attr,
877 &dev_attr_fnode_data_seq_in_order.attr,
878 &dev_attr_fnode_data_pdu_in_order.attr,
879 &dev_attr_fnode_chap_auth.attr,
880 &dev_attr_fnode_discovery_logout.attr,
881 &dev_attr_fnode_bidi_chap.attr,
882 &dev_attr_fnode_discovery_auth_optional.attr,
883 &dev_attr_fnode_erl.attr,
884 &dev_attr_fnode_first_burst_len.attr,
885 &dev_attr_fnode_def_time2wait.attr,
886 &dev_attr_fnode_def_time2retain.attr,
887 &dev_attr_fnode_max_outstanding_r2t.attr,
888 &dev_attr_fnode_isid.attr,
889 &dev_attr_fnode_tsid.attr,
890 &dev_attr_fnode_max_burst_len.attr,
891 &dev_attr_fnode_def_taskmgmt_tmo.attr,
892 &dev_attr_fnode_targetalias.attr,
893 &dev_attr_fnode_targetname.attr,
894 &dev_attr_fnode_tpgt.attr,
895 &dev_attr_fnode_discovery_parent_idx.attr,
896 &dev_attr_fnode_discovery_parent_type.attr,
897 &dev_attr_fnode_chap_in_idx.attr,
898 &dev_attr_fnode_chap_out_idx.attr,
899 &dev_attr_fnode_username.attr,
900 &dev_attr_fnode_username_in.attr,
901 &dev_attr_fnode_password.attr,
902 &dev_attr_fnode_password_in.attr,
903 &dev_attr_fnode_is_boot_target.attr,
904 NULL,
905 };
906
907 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
908 struct attribute *attr,
909 int i)
910 {
911 struct device *dev = container_of(kobj, struct device, kobj);
912 struct iscsi_bus_flash_session *fnode_sess =
913 iscsi_dev_to_flash_session(dev);
914 struct iscsi_transport *t = fnode_sess->transport;
915 int param;
916
917 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
918 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
919 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
920 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
921 } else if (attr == &dev_attr_fnode_portal_type.attr) {
922 param = ISCSI_FLASHNODE_PORTAL_TYPE;
923 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
924 param = ISCSI_FLASHNODE_ENTRY_EN;
925 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
926 param = ISCSI_FLASHNODE_IMM_DATA_EN;
927 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
928 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
929 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
930 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
931 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
932 param = ISCSI_FLASHNODE_PDU_INORDER;
933 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
934 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
935 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
936 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
937 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
938 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
939 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
940 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
941 } else if (attr == &dev_attr_fnode_erl.attr) {
942 param = ISCSI_FLASHNODE_ERL;
943 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
944 param = ISCSI_FLASHNODE_FIRST_BURST;
945 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
946 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
947 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
948 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
949 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
950 param = ISCSI_FLASHNODE_MAX_R2T;
951 } else if (attr == &dev_attr_fnode_isid.attr) {
952 param = ISCSI_FLASHNODE_ISID;
953 } else if (attr == &dev_attr_fnode_tsid.attr) {
954 param = ISCSI_FLASHNODE_TSID;
955 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
956 param = ISCSI_FLASHNODE_MAX_BURST;
957 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
958 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
959 } else if (attr == &dev_attr_fnode_targetalias.attr) {
960 param = ISCSI_FLASHNODE_ALIAS;
961 } else if (attr == &dev_attr_fnode_targetname.attr) {
962 param = ISCSI_FLASHNODE_NAME;
963 } else if (attr == &dev_attr_fnode_tpgt.attr) {
964 param = ISCSI_FLASHNODE_TPGT;
965 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
966 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
967 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
968 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
969 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
970 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
971 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
972 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
973 } else if (attr == &dev_attr_fnode_username.attr) {
974 param = ISCSI_FLASHNODE_USERNAME;
975 } else if (attr == &dev_attr_fnode_username_in.attr) {
976 param = ISCSI_FLASHNODE_USERNAME_IN;
977 } else if (attr == &dev_attr_fnode_password.attr) {
978 param = ISCSI_FLASHNODE_PASSWORD;
979 } else if (attr == &dev_attr_fnode_password_in.attr) {
980 param = ISCSI_FLASHNODE_PASSWORD_IN;
981 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
982 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
983 } else {
984 WARN_ONCE(1, "Invalid flashnode session attr");
985 return 0;
986 }
987
988 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
989 }
990
991 static struct attribute_group iscsi_flashnode_sess_attr_group = {
992 .attrs = iscsi_flashnode_sess_attrs,
993 .is_visible = iscsi_flashnode_sess_attr_is_visible,
994 };
995
996 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
997 &iscsi_flashnode_sess_attr_group,
998 NULL,
999 };
1000
1001 static void iscsi_flashnode_sess_release(struct device *dev)
1002 {
1003 struct iscsi_bus_flash_session *fnode_sess =
1004 iscsi_dev_to_flash_session(dev);
1005
1006 kfree(fnode_sess->targetname);
1007 kfree(fnode_sess->targetalias);
1008 kfree(fnode_sess->portal_type);
1009 kfree(fnode_sess);
1010 }
1011
1012 struct device_type iscsi_flashnode_sess_dev_type = {
1013 .name = "iscsi_flashnode_sess_dev_type",
1014 .groups = iscsi_flashnode_sess_attr_groups,
1015 .release = iscsi_flashnode_sess_release,
1016 };
1017
1018 /* flash node connection attrs show */
1019 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1020 static ssize_t \
1021 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1022 char *buf) \
1023 { \
1024 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1025 struct iscsi_bus_flash_session *fnode_sess = \
1026 iscsi_flash_conn_to_flash_session(fnode_conn);\
1027 struct iscsi_transport *t = fnode_conn->transport; \
1028 return t->get_flashnode_param(fnode_sess, param, buf); \
1029 } \
1030
1031
1032 #define iscsi_flashnode_conn_attr(type, name, param) \
1033 iscsi_flashnode_conn_attr_show(type, name, param) \
1034 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1035 show_##type##_##name, NULL);
1036
1037 /* Flash node connection attributes */
1038
1039 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1040 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1041 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1042 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1043 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1044 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1045 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1046 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1047 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1048 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1049 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1050 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1051 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1052 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1053 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1054 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1055 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1056 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1057 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1058 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1059 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1060 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1061 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1062 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1063 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1064 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1065 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1066 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1067 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1068 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1069 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1070 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1071 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1072 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1073 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1074 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1075 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1076 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1077 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1078
1079 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1080 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1081 &dev_attr_fnode_header_digest.attr,
1082 &dev_attr_fnode_data_digest.attr,
1083 &dev_attr_fnode_snack_req.attr,
1084 &dev_attr_fnode_tcp_timestamp_stat.attr,
1085 &dev_attr_fnode_tcp_nagle_disable.attr,
1086 &dev_attr_fnode_tcp_wsf_disable.attr,
1087 &dev_attr_fnode_tcp_timer_scale.attr,
1088 &dev_attr_fnode_tcp_timestamp_enable.attr,
1089 &dev_attr_fnode_fragment_disable.attr,
1090 &dev_attr_fnode_max_recv_dlength.attr,
1091 &dev_attr_fnode_max_xmit_dlength.attr,
1092 &dev_attr_fnode_keepalive_tmo.attr,
1093 &dev_attr_fnode_port.attr,
1094 &dev_attr_fnode_ipaddress.attr,
1095 &dev_attr_fnode_redirect_ipaddr.attr,
1096 &dev_attr_fnode_max_segment_size.attr,
1097 &dev_attr_fnode_local_port.attr,
1098 &dev_attr_fnode_ipv4_tos.attr,
1099 &dev_attr_fnode_ipv6_traffic_class.attr,
1100 &dev_attr_fnode_ipv6_flow_label.attr,
1101 &dev_attr_fnode_link_local_ipv6.attr,
1102 &dev_attr_fnode_tcp_xmit_wsf.attr,
1103 &dev_attr_fnode_tcp_recv_wsf.attr,
1104 &dev_attr_fnode_statsn.attr,
1105 &dev_attr_fnode_exp_statsn.attr,
1106 NULL,
1107 };
1108
1109 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1110 struct attribute *attr,
1111 int i)
1112 {
1113 struct device *dev = container_of(kobj, struct device, kobj);
1114 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1115 struct iscsi_transport *t = fnode_conn->transport;
1116 int param;
1117
1118 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1119 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1120 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1121 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1122 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1123 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1124 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1125 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1126 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1127 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1128 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1129 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1130 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1131 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1132 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1133 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1134 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1135 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1136 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1137 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1138 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1139 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1140 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1141 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1142 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1143 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1144 } else if (attr == &dev_attr_fnode_port.attr) {
1145 param = ISCSI_FLASHNODE_PORT;
1146 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1147 param = ISCSI_FLASHNODE_IPADDR;
1148 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1149 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1150 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1151 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1152 } else if (attr == &dev_attr_fnode_local_port.attr) {
1153 param = ISCSI_FLASHNODE_LOCAL_PORT;
1154 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1155 param = ISCSI_FLASHNODE_IPV4_TOS;
1156 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1157 param = ISCSI_FLASHNODE_IPV6_TC;
1158 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1159 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1160 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1161 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1162 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1163 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1164 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1165 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1166 } else if (attr == &dev_attr_fnode_statsn.attr) {
1167 param = ISCSI_FLASHNODE_STATSN;
1168 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1169 param = ISCSI_FLASHNODE_EXP_STATSN;
1170 } else {
1171 WARN_ONCE(1, "Invalid flashnode connection attr");
1172 return 0;
1173 }
1174
1175 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1176 }
1177
1178 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1179 .attrs = iscsi_flashnode_conn_attrs,
1180 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1181 };
1182
1183 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1184 &iscsi_flashnode_conn_attr_group,
1185 NULL,
1186 };
1187
1188 static void iscsi_flashnode_conn_release(struct device *dev)
1189 {
1190 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1191
1192 kfree(fnode_conn->ipaddress);
1193 kfree(fnode_conn->redirect_ipaddr);
1194 kfree(fnode_conn->link_local_ipv6_addr);
1195 kfree(fnode_conn);
1196 }
1197
1198 struct device_type iscsi_flashnode_conn_dev_type = {
1199 .name = "iscsi_flashnode_conn_dev_type",
1200 .groups = iscsi_flashnode_conn_attr_groups,
1201 .release = iscsi_flashnode_conn_release,
1202 };
1203
1204 struct bus_type iscsi_flashnode_bus;
1205
1206 int iscsi_flashnode_bus_match(struct device *dev,
1207 struct device_driver *drv)
1208 {
1209 if (dev->bus == &iscsi_flashnode_bus)
1210 return 1;
1211 return 0;
1212 }
1213 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1214
1215 struct bus_type iscsi_flashnode_bus = {
1216 .name = "iscsi_flashnode",
1217 .match = &iscsi_flashnode_bus_match,
1218 };
1219
1220 /**
1221 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1222 * @shost: pointer to host data
1223 * @index: index of flashnode to add in sysfs
1224 * @transport: pointer to transport data
1225 * @dd_size: total size to allocate
1226 *
1227 * Adds a sysfs entry for the flashnode session attributes
1228 *
1229 * Returns:
1230 * pointer to allocated flashnode sess on success
1231 * %NULL on failure
1232 */
1233 struct iscsi_bus_flash_session *
1234 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1235 struct iscsi_transport *transport,
1236 int dd_size)
1237 {
1238 struct iscsi_bus_flash_session *fnode_sess;
1239 int err;
1240
1241 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1242 if (!fnode_sess)
1243 return NULL;
1244
1245 fnode_sess->transport = transport;
1246 fnode_sess->target_id = index;
1247 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1248 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1249 fnode_sess->dev.parent = &shost->shost_gendev;
1250 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1251 shost->host_no, index);
1252
1253 err = device_register(&fnode_sess->dev);
1254 if (err)
1255 goto free_fnode_sess;
1256
1257 if (dd_size)
1258 fnode_sess->dd_data = &fnode_sess[1];
1259
1260 return fnode_sess;
1261
1262 free_fnode_sess:
1263 kfree(fnode_sess);
1264 return NULL;
1265 }
1266 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1267
1268 /**
1269 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1270 * @shost: pointer to host data
1271 * @fnode_sess: pointer to the parent flashnode session entry
1272 * @transport: pointer to transport data
1273 * @dd_size: total size to allocate
1274 *
1275 * Adds a sysfs entry for the flashnode connection attributes
1276 *
1277 * Returns:
1278 * pointer to allocated flashnode conn on success
1279 * %NULL on failure
1280 */
1281 struct iscsi_bus_flash_conn *
1282 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1283 struct iscsi_bus_flash_session *fnode_sess,
1284 struct iscsi_transport *transport,
1285 int dd_size)
1286 {
1287 struct iscsi_bus_flash_conn *fnode_conn;
1288 int err;
1289
1290 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1291 if (!fnode_conn)
1292 return NULL;
1293
1294 fnode_conn->transport = transport;
1295 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1296 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1297 fnode_conn->dev.parent = &fnode_sess->dev;
1298 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1299 shost->host_no, fnode_sess->target_id);
1300
1301 err = device_register(&fnode_conn->dev);
1302 if (err)
1303 goto free_fnode_conn;
1304
1305 if (dd_size)
1306 fnode_conn->dd_data = &fnode_conn[1];
1307
1308 return fnode_conn;
1309
1310 free_fnode_conn:
1311 kfree(fnode_conn);
1312 return NULL;
1313 }
1314 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1315
1316 /**
1317 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1318 * @dev: device to verify
1319 * @data: pointer to data containing value to use for verification
1320 *
1321 * Verifies if the passed device is flashnode conn device
1322 *
1323 * Returns:
1324 * 1 on success
1325 * 0 on failure
1326 */
1327 int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1328 {
1329 return dev->bus == &iscsi_flashnode_bus;
1330 }
1331 EXPORT_SYMBOL_GPL(iscsi_is_flashnode_conn_dev);
1332
1333 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1334 {
1335 device_unregister(&fnode_conn->dev);
1336 return 0;
1337 }
1338
1339 static int flashnode_match_index(struct device *dev, void *data)
1340 {
1341 struct iscsi_bus_flash_session *fnode_sess = NULL;
1342 int ret = 0;
1343
1344 if (!iscsi_flashnode_bus_match(dev, NULL))
1345 goto exit_match_index;
1346
1347 fnode_sess = iscsi_dev_to_flash_session(dev);
1348 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1349
1350 exit_match_index:
1351 return ret;
1352 }
1353
1354 /**
1355 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1356 * @shost: pointer to host data
1357 * @idx: index to match
1358 *
1359 * Finds the flashnode session object for the passed index
1360 *
1361 * Returns:
1362 * pointer to found flashnode session object on success
1363 * %NULL on failure
1364 */
1365 static struct iscsi_bus_flash_session *
1366 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1367 {
1368 struct iscsi_bus_flash_session *fnode_sess = NULL;
1369 struct device *dev;
1370
1371 dev = device_find_child(&shost->shost_gendev, &idx,
1372 flashnode_match_index);
1373 if (dev)
1374 fnode_sess = iscsi_dev_to_flash_session(dev);
1375
1376 return fnode_sess;
1377 }
1378
1379 /**
1380 * iscsi_find_flashnode_sess - finds flashnode session entry
1381 * @shost: pointer to host data
1382 * @data: pointer to data containing value to use for comparison
1383 * @fn: function pointer that does actual comparison
1384 *
1385 * Finds the flashnode session object comparing the data passed using logic
1386 * defined in passed function pointer
1387 *
1388 * Returns:
1389 * pointer to found flashnode session device object on success
1390 * %NULL on failure
1391 */
1392 struct device *
1393 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1394 int (*fn)(struct device *dev, void *data))
1395 {
1396 return device_find_child(&shost->shost_gendev, data, fn);
1397 }
1398 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1399
1400 /**
1401 * iscsi_find_flashnode_conn - finds flashnode connection entry
1402 * @fnode_sess: pointer to parent flashnode session entry
1403 *
1404 * Finds the flashnode connection object comparing the data passed using logic
1405 * defined in passed function pointer
1406 *
1407 * Returns:
1408 * pointer to found flashnode connection device object on success
1409 * %NULL on failure
1410 */
1411 struct device *
1412 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1413 {
1414 return device_find_child(&fnode_sess->dev, NULL,
1415 iscsi_is_flashnode_conn_dev);
1416 }
1417 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1418
1419 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1420 {
1421 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1422 return 0;
1423
1424 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1425 }
1426
1427 /**
1428 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1429 * @fnode_sess: pointer to flashnode session entry to be destroyed
1430 *
1431 * Deletes the flashnode session entry and all children flashnode connection
1432 * entries from sysfs
1433 */
1434 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1435 {
1436 int err;
1437
1438 err = device_for_each_child(&fnode_sess->dev, NULL,
1439 iscsi_iter_destroy_flashnode_conn_fn);
1440 if (err)
1441 pr_err("Could not delete all connections for %s. Error %d.\n",
1442 fnode_sess->dev.kobj.name, err);
1443
1444 device_unregister(&fnode_sess->dev);
1445 }
1446 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1447
1448 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1449 {
1450 if (!iscsi_flashnode_bus_match(dev, NULL))
1451 return 0;
1452
1453 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1454 return 0;
1455 }
1456
1457 /**
1458 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1459 * @shost: pointer to host data
1460 *
1461 * Destroys all the flashnode session entries and all corresponding children
1462 * flashnode connection entries from sysfs
1463 */
1464 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1465 {
1466 device_for_each_child(&shost->shost_gendev, NULL,
1467 iscsi_iter_destroy_flashnode_fn);
1468 }
1469 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1470
1471 /*
1472 * BSG support
1473 */
1474 /**
1475 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1476 * @job: bsg job to be processed
1477 */
1478 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1479 {
1480 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1481 struct iscsi_bsg_request *req = job->request;
1482 struct iscsi_bsg_reply *reply = job->reply;
1483 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1484 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1485 int ret;
1486
1487 /* check if we have the msgcode value at least */
1488 if (job->request_len < sizeof(uint32_t)) {
1489 ret = -ENOMSG;
1490 goto fail_host_msg;
1491 }
1492
1493 /* Validate the host command */
1494 switch (req->msgcode) {
1495 case ISCSI_BSG_HST_VENDOR:
1496 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1497 if ((shost->hostt->vendor_id == 0L) ||
1498 (req->rqst_data.h_vendor.vendor_id !=
1499 shost->hostt->vendor_id)) {
1500 ret = -ESRCH;
1501 goto fail_host_msg;
1502 }
1503 break;
1504 default:
1505 ret = -EBADR;
1506 goto fail_host_msg;
1507 }
1508
1509 /* check if we really have all the request data needed */
1510 if (job->request_len < cmdlen) {
1511 ret = -ENOMSG;
1512 goto fail_host_msg;
1513 }
1514
1515 ret = i->iscsi_transport->bsg_request(job);
1516 if (!ret)
1517 return 0;
1518
1519 fail_host_msg:
1520 /* return the errno failure code as the only status */
1521 BUG_ON(job->reply_len < sizeof(uint32_t));
1522 reply->reply_payload_rcv_len = 0;
1523 reply->result = ret;
1524 job->reply_len = sizeof(uint32_t);
1525 bsg_job_done(job, ret, 0);
1526 return 0;
1527 }
1528
1529 /**
1530 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1531 * @shost: shost for iscsi_host
1532 * @ihost: iscsi_cls_host adding the structures to
1533 */
1534 static int
1535 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1536 {
1537 struct device *dev = &shost->shost_gendev;
1538 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1539 struct request_queue *q;
1540 char bsg_name[20];
1541 int ret;
1542
1543 if (!i->iscsi_transport->bsg_request)
1544 return -ENOTSUPP;
1545
1546 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1547
1548 q = __scsi_alloc_queue(shost, bsg_request_fn);
1549 if (!q)
1550 return -ENOMEM;
1551
1552 ret = bsg_setup_queue(dev, q, bsg_name, iscsi_bsg_host_dispatch, 0);
1553 if (ret) {
1554 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1555 "initialize - no request queue\n");
1556 blk_cleanup_queue(q);
1557 return ret;
1558 }
1559
1560 ihost->bsg_q = q;
1561 return 0;
1562 }
1563
1564 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1565 struct device *cdev)
1566 {
1567 struct Scsi_Host *shost = dev_to_shost(dev);
1568 struct iscsi_cls_host *ihost = shost->shost_data;
1569
1570 memset(ihost, 0, sizeof(*ihost));
1571 atomic_set(&ihost->nr_scans, 0);
1572 mutex_init(&ihost->mutex);
1573
1574 iscsi_bsg_host_add(shost, ihost);
1575 /* ignore any bsg add error - we just can't do sgio */
1576
1577 return 0;
1578 }
1579
1580 static int iscsi_remove_host(struct transport_container *tc,
1581 struct device *dev, struct device *cdev)
1582 {
1583 struct Scsi_Host *shost = dev_to_shost(dev);
1584 struct iscsi_cls_host *ihost = shost->shost_data;
1585
1586 if (ihost->bsg_q) {
1587 bsg_unregister_queue(ihost->bsg_q);
1588 blk_cleanup_queue(ihost->bsg_q);
1589 }
1590 return 0;
1591 }
1592
1593 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1594 "iscsi_host",
1595 iscsi_setup_host,
1596 iscsi_remove_host,
1597 NULL);
1598
1599 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1600 "iscsi_session",
1601 NULL,
1602 NULL,
1603 NULL);
1604
1605 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1606 "iscsi_connection",
1607 NULL,
1608 NULL,
1609 NULL);
1610
1611 static struct sock *nls;
1612 static DEFINE_MUTEX(rx_queue_mutex);
1613
1614 static LIST_HEAD(sesslist);
1615 static DEFINE_SPINLOCK(sesslock);
1616 static LIST_HEAD(connlist);
1617 static DEFINE_SPINLOCK(connlock);
1618
1619 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1620 {
1621 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1622 return sess->sid;
1623 }
1624
1625 /*
1626 * Returns the matching session to a given sid
1627 */
1628 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1629 {
1630 unsigned long flags;
1631 struct iscsi_cls_session *sess;
1632
1633 spin_lock_irqsave(&sesslock, flags);
1634 list_for_each_entry(sess, &sesslist, sess_list) {
1635 if (sess->sid == sid) {
1636 spin_unlock_irqrestore(&sesslock, flags);
1637 return sess;
1638 }
1639 }
1640 spin_unlock_irqrestore(&sesslock, flags);
1641 return NULL;
1642 }
1643
1644 /*
1645 * Returns the matching connection to a given sid / cid tuple
1646 */
1647 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1648 {
1649 unsigned long flags;
1650 struct iscsi_cls_conn *conn;
1651
1652 spin_lock_irqsave(&connlock, flags);
1653 list_for_each_entry(conn, &connlist, conn_list) {
1654 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1655 spin_unlock_irqrestore(&connlock, flags);
1656 return conn;
1657 }
1658 }
1659 spin_unlock_irqrestore(&connlock, flags);
1660 return NULL;
1661 }
1662
1663 /*
1664 * The following functions can be used by LLDs that allocate
1665 * their own scsi_hosts or by software iscsi LLDs
1666 */
1667 static struct {
1668 int value;
1669 char *name;
1670 } iscsi_session_state_names[] = {
1671 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1672 { ISCSI_SESSION_FAILED, "FAILED" },
1673 { ISCSI_SESSION_FREE, "FREE" },
1674 };
1675
1676 static const char *iscsi_session_state_name(int state)
1677 {
1678 int i;
1679 char *name = NULL;
1680
1681 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1682 if (iscsi_session_state_names[i].value == state) {
1683 name = iscsi_session_state_names[i].name;
1684 break;
1685 }
1686 }
1687 return name;
1688 }
1689
1690 int iscsi_session_chkready(struct iscsi_cls_session *session)
1691 {
1692 unsigned long flags;
1693 int err;
1694
1695 spin_lock_irqsave(&session->lock, flags);
1696 switch (session->state) {
1697 case ISCSI_SESSION_LOGGED_IN:
1698 err = 0;
1699 break;
1700 case ISCSI_SESSION_FAILED:
1701 err = DID_IMM_RETRY << 16;
1702 break;
1703 case ISCSI_SESSION_FREE:
1704 err = DID_TRANSPORT_FAILFAST << 16;
1705 break;
1706 default:
1707 err = DID_NO_CONNECT << 16;
1708 break;
1709 }
1710 spin_unlock_irqrestore(&session->lock, flags);
1711 return err;
1712 }
1713 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1714
1715 int iscsi_is_session_online(struct iscsi_cls_session *session)
1716 {
1717 unsigned long flags;
1718 int ret = 0;
1719
1720 spin_lock_irqsave(&session->lock, flags);
1721 if (session->state == ISCSI_SESSION_LOGGED_IN)
1722 ret = 1;
1723 spin_unlock_irqrestore(&session->lock, flags);
1724 return ret;
1725 }
1726 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1727
1728 static void iscsi_session_release(struct device *dev)
1729 {
1730 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1731 struct Scsi_Host *shost;
1732
1733 shost = iscsi_session_to_shost(session);
1734 scsi_host_put(shost);
1735 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1736 kfree(session);
1737 }
1738
1739 int iscsi_is_session_dev(const struct device *dev)
1740 {
1741 return dev->release == iscsi_session_release;
1742 }
1743 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1744
1745 static int iscsi_iter_session_fn(struct device *dev, void *data)
1746 {
1747 void (* fn) (struct iscsi_cls_session *) = data;
1748
1749 if (!iscsi_is_session_dev(dev))
1750 return 0;
1751 fn(iscsi_dev_to_session(dev));
1752 return 0;
1753 }
1754
1755 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1756 void (*fn)(struct iscsi_cls_session *))
1757 {
1758 device_for_each_child(&shost->shost_gendev, fn,
1759 iscsi_iter_session_fn);
1760 }
1761 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1762
1763 /**
1764 * iscsi_scan_finished - helper to report when running scans are done
1765 * @shost: scsi host
1766 * @time: scan run time
1767 *
1768 * This function can be used by drives like qla4xxx to report to the scsi
1769 * layer when the scans it kicked off at module load time are done.
1770 */
1771 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1772 {
1773 struct iscsi_cls_host *ihost = shost->shost_data;
1774 /*
1775 * qla4xxx will have kicked off some session unblocks before calling
1776 * scsi_scan_host, so just wait for them to complete.
1777 */
1778 return !atomic_read(&ihost->nr_scans);
1779 }
1780 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1781
1782 struct iscsi_scan_data {
1783 unsigned int channel;
1784 unsigned int id;
1785 u64 lun;
1786 };
1787
1788 static int iscsi_user_scan_session(struct device *dev, void *data)
1789 {
1790 struct iscsi_scan_data *scan_data = data;
1791 struct iscsi_cls_session *session;
1792 struct Scsi_Host *shost;
1793 struct iscsi_cls_host *ihost;
1794 unsigned long flags;
1795 unsigned int id;
1796
1797 if (!iscsi_is_session_dev(dev))
1798 return 0;
1799
1800 session = iscsi_dev_to_session(dev);
1801
1802 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1803
1804 shost = iscsi_session_to_shost(session);
1805 ihost = shost->shost_data;
1806
1807 mutex_lock(&ihost->mutex);
1808 spin_lock_irqsave(&session->lock, flags);
1809 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1810 spin_unlock_irqrestore(&session->lock, flags);
1811 goto user_scan_exit;
1812 }
1813 id = session->target_id;
1814 spin_unlock_irqrestore(&session->lock, flags);
1815
1816 if (id != ISCSI_MAX_TARGET) {
1817 if ((scan_data->channel == SCAN_WILD_CARD ||
1818 scan_data->channel == 0) &&
1819 (scan_data->id == SCAN_WILD_CARD ||
1820 scan_data->id == id))
1821 scsi_scan_target(&session->dev, 0, id,
1822 scan_data->lun, 1);
1823 }
1824
1825 user_scan_exit:
1826 mutex_unlock(&ihost->mutex);
1827 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1828 return 0;
1829 }
1830
1831 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1832 uint id, u64 lun)
1833 {
1834 struct iscsi_scan_data scan_data;
1835
1836 scan_data.channel = channel;
1837 scan_data.id = id;
1838 scan_data.lun = lun;
1839
1840 return device_for_each_child(&shost->shost_gendev, &scan_data,
1841 iscsi_user_scan_session);
1842 }
1843
1844 static void iscsi_scan_session(struct work_struct *work)
1845 {
1846 struct iscsi_cls_session *session =
1847 container_of(work, struct iscsi_cls_session, scan_work);
1848 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1849 struct iscsi_cls_host *ihost = shost->shost_data;
1850 struct iscsi_scan_data scan_data;
1851
1852 scan_data.channel = 0;
1853 scan_data.id = SCAN_WILD_CARD;
1854 scan_data.lun = SCAN_WILD_CARD;
1855
1856 iscsi_user_scan_session(&session->dev, &scan_data);
1857 atomic_dec(&ihost->nr_scans);
1858 }
1859
1860 /**
1861 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1862 * @cmd: scsi cmd passed to scsi eh handler
1863 *
1864 * If the session is down this function will wait for the recovery
1865 * timer to fire or for the session to be logged back in. If the
1866 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1867 * should pass this error value to the scsi eh.
1868 */
1869 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1870 {
1871 struct iscsi_cls_session *session =
1872 starget_to_session(scsi_target(cmd->device));
1873 unsigned long flags;
1874 int ret = 0;
1875
1876 spin_lock_irqsave(&session->lock, flags);
1877 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1878 if (session->state == ISCSI_SESSION_FREE) {
1879 ret = FAST_IO_FAIL;
1880 break;
1881 }
1882 spin_unlock_irqrestore(&session->lock, flags);
1883 msleep(1000);
1884 spin_lock_irqsave(&session->lock, flags);
1885 }
1886 spin_unlock_irqrestore(&session->lock, flags);
1887 return ret;
1888 }
1889 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1890
1891 static void session_recovery_timedout(struct work_struct *work)
1892 {
1893 struct iscsi_cls_session *session =
1894 container_of(work, struct iscsi_cls_session,
1895 recovery_work.work);
1896 unsigned long flags;
1897
1898 iscsi_cls_session_printk(KERN_INFO, session,
1899 "session recovery timed out after %d secs\n",
1900 session->recovery_tmo);
1901
1902 spin_lock_irqsave(&session->lock, flags);
1903 switch (session->state) {
1904 case ISCSI_SESSION_FAILED:
1905 session->state = ISCSI_SESSION_FREE;
1906 break;
1907 case ISCSI_SESSION_LOGGED_IN:
1908 case ISCSI_SESSION_FREE:
1909 /* we raced with the unblock's flush */
1910 spin_unlock_irqrestore(&session->lock, flags);
1911 return;
1912 }
1913 spin_unlock_irqrestore(&session->lock, flags);
1914
1915 if (session->transport->session_recovery_timedout)
1916 session->transport->session_recovery_timedout(session);
1917
1918 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1919 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1920 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1921 }
1922
1923 static void __iscsi_unblock_session(struct work_struct *work)
1924 {
1925 struct iscsi_cls_session *session =
1926 container_of(work, struct iscsi_cls_session,
1927 unblock_work);
1928 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1929 struct iscsi_cls_host *ihost = shost->shost_data;
1930 unsigned long flags;
1931
1932 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1933 /*
1934 * The recovery and unblock work get run from the same workqueue,
1935 * so try to cancel it if it was going to run after this unblock.
1936 */
1937 cancel_delayed_work(&session->recovery_work);
1938 spin_lock_irqsave(&session->lock, flags);
1939 session->state = ISCSI_SESSION_LOGGED_IN;
1940 spin_unlock_irqrestore(&session->lock, flags);
1941 /* start IO */
1942 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1943 /*
1944 * Only do kernel scanning if the driver is properly hooked into
1945 * the async scanning code (drivers like iscsi_tcp do login and
1946 * scanning from userspace).
1947 */
1948 if (shost->hostt->scan_finished) {
1949 if (scsi_queue_work(shost, &session->scan_work))
1950 atomic_inc(&ihost->nr_scans);
1951 }
1952 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1953 }
1954
1955 /**
1956 * iscsi_unblock_session - set a session as logged in and start IO.
1957 * @session: iscsi session
1958 *
1959 * Mark a session as ready to accept IO.
1960 */
1961 void iscsi_unblock_session(struct iscsi_cls_session *session)
1962 {
1963 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1964 /*
1965 * make sure all the events have completed before tell the driver
1966 * it is safe
1967 */
1968 flush_workqueue(iscsi_eh_timer_workq);
1969 }
1970 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1971
1972 static void __iscsi_block_session(struct work_struct *work)
1973 {
1974 struct iscsi_cls_session *session =
1975 container_of(work, struct iscsi_cls_session,
1976 block_work);
1977 unsigned long flags;
1978
1979 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1980 spin_lock_irqsave(&session->lock, flags);
1981 session->state = ISCSI_SESSION_FAILED;
1982 spin_unlock_irqrestore(&session->lock, flags);
1983 scsi_target_block(&session->dev);
1984 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1985 if (session->recovery_tmo >= 0)
1986 queue_delayed_work(iscsi_eh_timer_workq,
1987 &session->recovery_work,
1988 session->recovery_tmo * HZ);
1989 }
1990
1991 void iscsi_block_session(struct iscsi_cls_session *session)
1992 {
1993 queue_work(iscsi_eh_timer_workq, &session->block_work);
1994 }
1995 EXPORT_SYMBOL_GPL(iscsi_block_session);
1996
1997 static void __iscsi_unbind_session(struct work_struct *work)
1998 {
1999 struct iscsi_cls_session *session =
2000 container_of(work, struct iscsi_cls_session,
2001 unbind_work);
2002 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2003 struct iscsi_cls_host *ihost = shost->shost_data;
2004 unsigned long flags;
2005 unsigned int target_id;
2006
2007 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2008
2009 /* Prevent new scans and make sure scanning is not in progress */
2010 mutex_lock(&ihost->mutex);
2011 spin_lock_irqsave(&session->lock, flags);
2012 if (session->target_id == ISCSI_MAX_TARGET) {
2013 spin_unlock_irqrestore(&session->lock, flags);
2014 mutex_unlock(&ihost->mutex);
2015 return;
2016 }
2017
2018 target_id = session->target_id;
2019 session->target_id = ISCSI_MAX_TARGET;
2020 spin_unlock_irqrestore(&session->lock, flags);
2021 mutex_unlock(&ihost->mutex);
2022
2023 if (session->ida_used)
2024 ida_simple_remove(&iscsi_sess_ida, target_id);
2025
2026 scsi_remove_target(&session->dev);
2027 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2028 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2029 }
2030
2031 struct iscsi_cls_session *
2032 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2033 int dd_size)
2034 {
2035 struct iscsi_cls_session *session;
2036
2037 session = kzalloc(sizeof(*session) + dd_size,
2038 GFP_KERNEL);
2039 if (!session)
2040 return NULL;
2041
2042 session->transport = transport;
2043 session->creator = -1;
2044 session->recovery_tmo = 120;
2045 session->recovery_tmo_sysfs_override = false;
2046 session->state = ISCSI_SESSION_FREE;
2047 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2048 INIT_LIST_HEAD(&session->sess_list);
2049 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2050 INIT_WORK(&session->block_work, __iscsi_block_session);
2051 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2052 INIT_WORK(&session->scan_work, iscsi_scan_session);
2053 spin_lock_init(&session->lock);
2054
2055 /* this is released in the dev's release function */
2056 scsi_host_get(shost);
2057 session->dev.parent = &shost->shost_gendev;
2058 session->dev.release = iscsi_session_release;
2059 device_initialize(&session->dev);
2060 if (dd_size)
2061 session->dd_data = &session[1];
2062
2063 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2064 return session;
2065 }
2066 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2067
2068 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2069 {
2070 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2071 struct iscsi_cls_host *ihost;
2072 unsigned long flags;
2073 int id = 0;
2074 int err;
2075
2076 ihost = shost->shost_data;
2077 session->sid = atomic_add_return(1, &iscsi_session_nr);
2078
2079 if (target_id == ISCSI_MAX_TARGET) {
2080 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2081
2082 if (id < 0) {
2083 iscsi_cls_session_printk(KERN_ERR, session,
2084 "Failure in Target ID Allocation\n");
2085 return id;
2086 }
2087 session->target_id = (unsigned int)id;
2088 session->ida_used = true;
2089 } else
2090 session->target_id = target_id;
2091
2092 dev_set_name(&session->dev, "session%u", session->sid);
2093 err = device_add(&session->dev);
2094 if (err) {
2095 iscsi_cls_session_printk(KERN_ERR, session,
2096 "could not register session's dev\n");
2097 goto release_ida;
2098 }
2099 transport_register_device(&session->dev);
2100
2101 spin_lock_irqsave(&sesslock, flags);
2102 list_add(&session->sess_list, &sesslist);
2103 spin_unlock_irqrestore(&sesslock, flags);
2104
2105 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2106 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2107 return 0;
2108
2109 release_ida:
2110 if (session->ida_used)
2111 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2112
2113 return err;
2114 }
2115 EXPORT_SYMBOL_GPL(iscsi_add_session);
2116
2117 /**
2118 * iscsi_create_session - create iscsi class session
2119 * @shost: scsi host
2120 * @transport: iscsi transport
2121 * @dd_size: private driver data size
2122 * @target_id: which target
2123 *
2124 * This can be called from a LLD or iscsi_transport.
2125 */
2126 struct iscsi_cls_session *
2127 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2128 int dd_size, unsigned int target_id)
2129 {
2130 struct iscsi_cls_session *session;
2131
2132 session = iscsi_alloc_session(shost, transport, dd_size);
2133 if (!session)
2134 return NULL;
2135
2136 if (iscsi_add_session(session, target_id)) {
2137 iscsi_free_session(session);
2138 return NULL;
2139 }
2140 return session;
2141 }
2142 EXPORT_SYMBOL_GPL(iscsi_create_session);
2143
2144 static void iscsi_conn_release(struct device *dev)
2145 {
2146 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2147 struct device *parent = conn->dev.parent;
2148
2149 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2150 kfree(conn);
2151 put_device(parent);
2152 }
2153
2154 static int iscsi_is_conn_dev(const struct device *dev)
2155 {
2156 return dev->release == iscsi_conn_release;
2157 }
2158
2159 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2160 {
2161 if (!iscsi_is_conn_dev(dev))
2162 return 0;
2163 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2164 }
2165
2166 void iscsi_remove_session(struct iscsi_cls_session *session)
2167 {
2168 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2169 unsigned long flags;
2170 int err;
2171
2172 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2173
2174 spin_lock_irqsave(&sesslock, flags);
2175 list_del(&session->sess_list);
2176 spin_unlock_irqrestore(&sesslock, flags);
2177
2178 /* make sure there are no blocks/unblocks queued */
2179 flush_workqueue(iscsi_eh_timer_workq);
2180 /* make sure the timedout callout is not running */
2181 if (!cancel_delayed_work(&session->recovery_work))
2182 flush_workqueue(iscsi_eh_timer_workq);
2183 /*
2184 * If we are blocked let commands flow again. The lld or iscsi
2185 * layer should set up the queuecommand to fail commands.
2186 * We assume that LLD will not be calling block/unblock while
2187 * removing the session.
2188 */
2189 spin_lock_irqsave(&session->lock, flags);
2190 session->state = ISCSI_SESSION_FREE;
2191 spin_unlock_irqrestore(&session->lock, flags);
2192
2193 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2194 /* flush running scans then delete devices */
2195 scsi_flush_work(shost);
2196 __iscsi_unbind_session(&session->unbind_work);
2197
2198 /* hw iscsi may not have removed all connections from session */
2199 err = device_for_each_child(&session->dev, NULL,
2200 iscsi_iter_destroy_conn_fn);
2201 if (err)
2202 iscsi_cls_session_printk(KERN_ERR, session,
2203 "Could not delete all connections "
2204 "for session. Error %d.\n", err);
2205
2206 transport_unregister_device(&session->dev);
2207
2208 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2209 device_del(&session->dev);
2210 }
2211 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2212
2213 void iscsi_free_session(struct iscsi_cls_session *session)
2214 {
2215 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2216 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2217 put_device(&session->dev);
2218 }
2219 EXPORT_SYMBOL_GPL(iscsi_free_session);
2220
2221 /**
2222 * iscsi_destroy_session - destroy iscsi session
2223 * @session: iscsi_session
2224 *
2225 * Can be called by a LLD or iscsi_transport. There must not be
2226 * any running connections.
2227 */
2228 int iscsi_destroy_session(struct iscsi_cls_session *session)
2229 {
2230 iscsi_remove_session(session);
2231 ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
2232 iscsi_free_session(session);
2233 return 0;
2234 }
2235 EXPORT_SYMBOL_GPL(iscsi_destroy_session);
2236
2237 /**
2238 * iscsi_create_conn - create iscsi class connection
2239 * @session: iscsi cls session
2240 * @dd_size: private driver data size
2241 * @cid: connection id
2242 *
2243 * This can be called from a LLD or iscsi_transport. The connection
2244 * is child of the session so cid must be unique for all connections
2245 * on the session.
2246 *
2247 * Since we do not support MCS, cid will normally be zero. In some cases
2248 * for software iscsi we could be trying to preallocate a connection struct
2249 * in which case there could be two connection structs and cid would be
2250 * non-zero.
2251 */
2252 struct iscsi_cls_conn *
2253 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2254 {
2255 struct iscsi_transport *transport = session->transport;
2256 struct iscsi_cls_conn *conn;
2257 unsigned long flags;
2258 int err;
2259
2260 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2261 if (!conn)
2262 return NULL;
2263 if (dd_size)
2264 conn->dd_data = &conn[1];
2265
2266 mutex_init(&conn->ep_mutex);
2267 INIT_LIST_HEAD(&conn->conn_list);
2268 conn->transport = transport;
2269 conn->cid = cid;
2270
2271 /* this is released in the dev's release function */
2272 if (!get_device(&session->dev))
2273 goto free_conn;
2274
2275 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2276 conn->dev.parent = &session->dev;
2277 conn->dev.release = iscsi_conn_release;
2278 err = device_register(&conn->dev);
2279 if (err) {
2280 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2281 "register connection's dev\n");
2282 goto release_parent_ref;
2283 }
2284 transport_register_device(&conn->dev);
2285
2286 spin_lock_irqsave(&connlock, flags);
2287 list_add(&conn->conn_list, &connlist);
2288 spin_unlock_irqrestore(&connlock, flags);
2289
2290 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2291 return conn;
2292
2293 release_parent_ref:
2294 put_device(&session->dev);
2295 free_conn:
2296 kfree(conn);
2297 return NULL;
2298 }
2299
2300 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2301
2302 /**
2303 * iscsi_destroy_conn - destroy iscsi class connection
2304 * @conn: iscsi cls session
2305 *
2306 * This can be called from a LLD or iscsi_transport.
2307 */
2308 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2309 {
2310 unsigned long flags;
2311
2312 spin_lock_irqsave(&connlock, flags);
2313 list_del(&conn->conn_list);
2314 spin_unlock_irqrestore(&connlock, flags);
2315
2316 transport_unregister_device(&conn->dev);
2317 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2318 device_unregister(&conn->dev);
2319 return 0;
2320 }
2321 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2322
2323 /*
2324 * iscsi interface functions
2325 */
2326 static struct iscsi_internal *
2327 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2328 {
2329 struct iscsi_internal *priv;
2330 unsigned long flags;
2331
2332 spin_lock_irqsave(&iscsi_transport_lock, flags);
2333 list_for_each_entry(priv, &iscsi_transports, list) {
2334 if (tt == priv->iscsi_transport) {
2335 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2336 return priv;
2337 }
2338 }
2339 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2340 return NULL;
2341 }
2342
2343 static int
2344 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2345 {
2346 return nlmsg_multicast(nls, skb, 0, group, gfp);
2347 }
2348
2349 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2350 char *data, uint32_t data_size)
2351 {
2352 struct nlmsghdr *nlh;
2353 struct sk_buff *skb;
2354 struct iscsi_uevent *ev;
2355 char *pdu;
2356 struct iscsi_internal *priv;
2357 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2358 data_size);
2359
2360 priv = iscsi_if_transport_lookup(conn->transport);
2361 if (!priv)
2362 return -EINVAL;
2363
2364 skb = alloc_skb(len, GFP_ATOMIC);
2365 if (!skb) {
2366 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2367 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2368 "control PDU: OOM\n");
2369 return -ENOMEM;
2370 }
2371
2372 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2373 ev = nlmsg_data(nlh);
2374 memset(ev, 0, sizeof(*ev));
2375 ev->transport_handle = iscsi_handle(conn->transport);
2376 ev->type = ISCSI_KEVENT_RECV_PDU;
2377 ev->r.recv_req.cid = conn->cid;
2378 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2379 pdu = (char*)ev + sizeof(*ev);
2380 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2381 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2382
2383 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2384 }
2385 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2386
2387 int iscsi_offload_mesg(struct Scsi_Host *shost,
2388 struct iscsi_transport *transport, uint32_t type,
2389 char *data, uint16_t data_size)
2390 {
2391 struct nlmsghdr *nlh;
2392 struct sk_buff *skb;
2393 struct iscsi_uevent *ev;
2394 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2395
2396 skb = alloc_skb(len, GFP_ATOMIC);
2397 if (!skb) {
2398 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2399 return -ENOMEM;
2400 }
2401
2402 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2403 ev = nlmsg_data(nlh);
2404 memset(ev, 0, sizeof(*ev));
2405 ev->type = type;
2406 ev->transport_handle = iscsi_handle(transport);
2407 switch (type) {
2408 case ISCSI_KEVENT_PATH_REQ:
2409 ev->r.req_path.host_no = shost->host_no;
2410 break;
2411 case ISCSI_KEVENT_IF_DOWN:
2412 ev->r.notify_if_down.host_no = shost->host_no;
2413 break;
2414 }
2415
2416 memcpy((char *)ev + sizeof(*ev), data, data_size);
2417
2418 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2419 }
2420 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2421
2422 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2423 {
2424 struct nlmsghdr *nlh;
2425 struct sk_buff *skb;
2426 struct iscsi_uevent *ev;
2427 struct iscsi_internal *priv;
2428 int len = nlmsg_total_size(sizeof(*ev));
2429
2430 priv = iscsi_if_transport_lookup(conn->transport);
2431 if (!priv)
2432 return;
2433
2434 skb = alloc_skb(len, GFP_ATOMIC);
2435 if (!skb) {
2436 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2437 "conn error (%d)\n", error);
2438 return;
2439 }
2440
2441 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2442 ev = nlmsg_data(nlh);
2443 ev->transport_handle = iscsi_handle(conn->transport);
2444 ev->type = ISCSI_KEVENT_CONN_ERROR;
2445 ev->r.connerror.error = error;
2446 ev->r.connerror.cid = conn->cid;
2447 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2448
2449 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2450
2451 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2452 error);
2453 }
2454 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2455
2456 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2457 enum iscsi_conn_state state)
2458 {
2459 struct nlmsghdr *nlh;
2460 struct sk_buff *skb;
2461 struct iscsi_uevent *ev;
2462 struct iscsi_internal *priv;
2463 int len = nlmsg_total_size(sizeof(*ev));
2464
2465 priv = iscsi_if_transport_lookup(conn->transport);
2466 if (!priv)
2467 return;
2468
2469 skb = alloc_skb(len, GFP_ATOMIC);
2470 if (!skb) {
2471 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2472 "conn login (%d)\n", state);
2473 return;
2474 }
2475
2476 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2477 ev = nlmsg_data(nlh);
2478 ev->transport_handle = iscsi_handle(conn->transport);
2479 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2480 ev->r.conn_login.state = state;
2481 ev->r.conn_login.cid = conn->cid;
2482 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2483 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2484
2485 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2486 state);
2487 }
2488 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2489
2490 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2491 enum iscsi_host_event_code code, uint32_t data_size,
2492 uint8_t *data)
2493 {
2494 struct nlmsghdr *nlh;
2495 struct sk_buff *skb;
2496 struct iscsi_uevent *ev;
2497 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2498
2499 skb = alloc_skb(len, GFP_NOIO);
2500 if (!skb) {
2501 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2502 host_no, code);
2503 return;
2504 }
2505
2506 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2507 ev = nlmsg_data(nlh);
2508 ev->transport_handle = iscsi_handle(transport);
2509 ev->type = ISCSI_KEVENT_HOST_EVENT;
2510 ev->r.host_event.host_no = host_no;
2511 ev->r.host_event.code = code;
2512 ev->r.host_event.data_size = data_size;
2513
2514 if (data_size)
2515 memcpy((char *)ev + sizeof(*ev), data, data_size);
2516
2517 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2518 }
2519 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2520
2521 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2522 uint32_t status, uint32_t pid, uint32_t data_size,
2523 uint8_t *data)
2524 {
2525 struct nlmsghdr *nlh;
2526 struct sk_buff *skb;
2527 struct iscsi_uevent *ev;
2528 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2529
2530 skb = alloc_skb(len, GFP_NOIO);
2531 if (!skb) {
2532 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2533 return;
2534 }
2535
2536 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2537 ev = nlmsg_data(nlh);
2538 ev->transport_handle = iscsi_handle(transport);
2539 ev->type = ISCSI_KEVENT_PING_COMP;
2540 ev->r.ping_comp.host_no = host_no;
2541 ev->r.ping_comp.status = status;
2542 ev->r.ping_comp.pid = pid;
2543 ev->r.ping_comp.data_size = data_size;
2544 memcpy((char *)ev + sizeof(*ev), data, data_size);
2545
2546 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2547 }
2548 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2549
2550 static int
2551 iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
2552 void *payload, int size)
2553 {
2554 struct sk_buff *skb;
2555 struct nlmsghdr *nlh;
2556 int len = nlmsg_total_size(size);
2557 int flags = multi ? NLM_F_MULTI : 0;
2558 int t = done ? NLMSG_DONE : type;
2559
2560 skb = alloc_skb(len, GFP_ATOMIC);
2561 if (!skb) {
2562 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2563 return -ENOMEM;
2564 }
2565
2566 nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
2567 nlh->nlmsg_flags = flags;
2568 memcpy(nlmsg_data(nlh), payload, size);
2569 return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
2570 }
2571
2572 static int
2573 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2574 {
2575 struct iscsi_uevent *ev = nlmsg_data(nlh);
2576 struct iscsi_stats *stats;
2577 struct sk_buff *skbstat;
2578 struct iscsi_cls_conn *conn;
2579 struct nlmsghdr *nlhstat;
2580 struct iscsi_uevent *evstat;
2581 struct iscsi_internal *priv;
2582 int len = nlmsg_total_size(sizeof(*ev) +
2583 sizeof(struct iscsi_stats) +
2584 sizeof(struct iscsi_stats_custom) *
2585 ISCSI_STATS_CUSTOM_MAX);
2586 int err = 0;
2587
2588 priv = iscsi_if_transport_lookup(transport);
2589 if (!priv)
2590 return -EINVAL;
2591
2592 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2593 if (!conn)
2594 return -EEXIST;
2595
2596 do {
2597 int actual_size;
2598
2599 skbstat = alloc_skb(len, GFP_ATOMIC);
2600 if (!skbstat) {
2601 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2602 "deliver stats: OOM\n");
2603 return -ENOMEM;
2604 }
2605
2606 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2607 (len - sizeof(*nlhstat)), 0);
2608 evstat = nlmsg_data(nlhstat);
2609 memset(evstat, 0, sizeof(*evstat));
2610 evstat->transport_handle = iscsi_handle(conn->transport);
2611 evstat->type = nlh->nlmsg_type;
2612 evstat->u.get_stats.cid =
2613 ev->u.get_stats.cid;
2614 evstat->u.get_stats.sid =
2615 ev->u.get_stats.sid;
2616 stats = (struct iscsi_stats *)
2617 ((char*)evstat + sizeof(*evstat));
2618 memset(stats, 0, sizeof(*stats));
2619
2620 transport->get_stats(conn, stats);
2621 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2622 sizeof(struct iscsi_stats) +
2623 sizeof(struct iscsi_stats_custom) *
2624 stats->custom_length);
2625 actual_size -= sizeof(*nlhstat);
2626 actual_size = nlmsg_msg_size(actual_size);
2627 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2628 nlhstat->nlmsg_len = actual_size;
2629
2630 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2631 GFP_ATOMIC);
2632 } while (err < 0 && err != -ECONNREFUSED);
2633
2634 return err;
2635 }
2636
2637 /**
2638 * iscsi_session_event - send session destr. completion event
2639 * @session: iscsi class session
2640 * @event: type of event
2641 */
2642 int iscsi_session_event(struct iscsi_cls_session *session,
2643 enum iscsi_uevent_e event)
2644 {
2645 struct iscsi_internal *priv;
2646 struct Scsi_Host *shost;
2647 struct iscsi_uevent *ev;
2648 struct sk_buff *skb;
2649 struct nlmsghdr *nlh;
2650 int rc, len = nlmsg_total_size(sizeof(*ev));
2651
2652 priv = iscsi_if_transport_lookup(session->transport);
2653 if (!priv)
2654 return -EINVAL;
2655 shost = iscsi_session_to_shost(session);
2656
2657 skb = alloc_skb(len, GFP_KERNEL);
2658 if (!skb) {
2659 iscsi_cls_session_printk(KERN_ERR, session,
2660 "Cannot notify userspace of session "
2661 "event %u\n", event);
2662 return -ENOMEM;
2663 }
2664
2665 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2666 ev = nlmsg_data(nlh);
2667 ev->transport_handle = iscsi_handle(session->transport);
2668
2669 ev->type = event;
2670 switch (event) {
2671 case ISCSI_KEVENT_DESTROY_SESSION:
2672 ev->r.d_session.host_no = shost->host_no;
2673 ev->r.d_session.sid = session->sid;
2674 break;
2675 case ISCSI_KEVENT_CREATE_SESSION:
2676 ev->r.c_session_ret.host_no = shost->host_no;
2677 ev->r.c_session_ret.sid = session->sid;
2678 break;
2679 case ISCSI_KEVENT_UNBIND_SESSION:
2680 ev->r.unbind_session.host_no = shost->host_no;
2681 ev->r.unbind_session.sid = session->sid;
2682 break;
2683 default:
2684 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2685 "%u.\n", event);
2686 kfree_skb(skb);
2687 return -EINVAL;
2688 }
2689
2690 /*
2691 * this will occur if the daemon is not up, so we just warn
2692 * the user and when the daemon is restarted it will handle it
2693 */
2694 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2695 if (rc == -ESRCH)
2696 iscsi_cls_session_printk(KERN_ERR, session,
2697 "Cannot notify userspace of session "
2698 "event %u. Check iscsi daemon\n",
2699 event);
2700
2701 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2702 event, rc);
2703 return rc;
2704 }
2705 EXPORT_SYMBOL_GPL(iscsi_session_event);
2706
2707 static int
2708 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2709 struct iscsi_uevent *ev, pid_t pid,
2710 uint32_t initial_cmdsn, uint16_t cmds_max,
2711 uint16_t queue_depth)
2712 {
2713 struct iscsi_transport *transport = priv->iscsi_transport;
2714 struct iscsi_cls_session *session;
2715 struct Scsi_Host *shost;
2716
2717 session = transport->create_session(ep, cmds_max, queue_depth,
2718 initial_cmdsn);
2719 if (!session)
2720 return -ENOMEM;
2721
2722 session->creator = pid;
2723 shost = iscsi_session_to_shost(session);
2724 ev->r.c_session_ret.host_no = shost->host_no;
2725 ev->r.c_session_ret.sid = session->sid;
2726 ISCSI_DBG_TRANS_SESSION(session,
2727 "Completed creating transport session\n");
2728 return 0;
2729 }
2730
2731 static int
2732 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2733 {
2734 struct iscsi_cls_conn *conn;
2735 struct iscsi_cls_session *session;
2736
2737 session = iscsi_session_lookup(ev->u.c_conn.sid);
2738 if (!session) {
2739 printk(KERN_ERR "iscsi: invalid session %d.\n",
2740 ev->u.c_conn.sid);
2741 return -EINVAL;
2742 }
2743
2744 conn = transport->create_conn(session, ev->u.c_conn.cid);
2745 if (!conn) {
2746 iscsi_cls_session_printk(KERN_ERR, session,
2747 "couldn't create a new connection.");
2748 return -ENOMEM;
2749 }
2750
2751 ev->r.c_conn_ret.sid = session->sid;
2752 ev->r.c_conn_ret.cid = conn->cid;
2753
2754 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2755 return 0;
2756 }
2757
2758 static int
2759 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2760 {
2761 struct iscsi_cls_conn *conn;
2762
2763 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2764 if (!conn)
2765 return -EINVAL;
2766
2767 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2768 if (transport->destroy_conn)
2769 transport->destroy_conn(conn);
2770
2771 return 0;
2772 }
2773
2774 static int
2775 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2776 {
2777 char *data = (char*)ev + sizeof(*ev);
2778 struct iscsi_cls_conn *conn;
2779 struct iscsi_cls_session *session;
2780 int err = 0, value = 0;
2781
2782 session = iscsi_session_lookup(ev->u.set_param.sid);
2783 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2784 if (!conn || !session)
2785 return -EINVAL;
2786
2787 switch (ev->u.set_param.param) {
2788 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2789 sscanf(data, "%d", &value);
2790 if (!session->recovery_tmo_sysfs_override)
2791 session->recovery_tmo = value;
2792 break;
2793 default:
2794 err = transport->set_param(conn, ev->u.set_param.param,
2795 data, ev->u.set_param.len);
2796 }
2797
2798 return err;
2799 }
2800
2801 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2802 struct iscsi_uevent *ev, int msg_type)
2803 {
2804 struct iscsi_endpoint *ep;
2805 struct sockaddr *dst_addr;
2806 struct Scsi_Host *shost = NULL;
2807 int non_blocking, err = 0;
2808
2809 if (!transport->ep_connect)
2810 return -EINVAL;
2811
2812 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2813 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2814 if (!shost) {
2815 printk(KERN_ERR "ep connect failed. Could not find "
2816 "host no %u\n",
2817 ev->u.ep_connect_through_host.host_no);
2818 return -ENODEV;
2819 }
2820 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2821 } else
2822 non_blocking = ev->u.ep_connect.non_blocking;
2823
2824 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2825 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2826 if (IS_ERR(ep)) {
2827 err = PTR_ERR(ep);
2828 goto release_host;
2829 }
2830
2831 ev->r.ep_connect_ret.handle = ep->id;
2832 release_host:
2833 if (shost)
2834 scsi_host_put(shost);
2835 return err;
2836 }
2837
2838 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2839 u64 ep_handle)
2840 {
2841 struct iscsi_cls_conn *conn;
2842 struct iscsi_endpoint *ep;
2843
2844 if (!transport->ep_disconnect)
2845 return -EINVAL;
2846
2847 ep = iscsi_lookup_endpoint(ep_handle);
2848 if (!ep)
2849 return -EINVAL;
2850 conn = ep->conn;
2851 if (conn) {
2852 mutex_lock(&conn->ep_mutex);
2853 conn->ep = NULL;
2854 mutex_unlock(&conn->ep_mutex);
2855 }
2856
2857 transport->ep_disconnect(ep);
2858 return 0;
2859 }
2860
2861 static int
2862 iscsi_if_transport_ep(struct iscsi_transport *transport,
2863 struct iscsi_uevent *ev, int msg_type)
2864 {
2865 struct iscsi_endpoint *ep;
2866 int rc = 0;
2867
2868 switch (msg_type) {
2869 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2870 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2871 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2872 break;
2873 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2874 if (!transport->ep_poll)
2875 return -EINVAL;
2876
2877 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2878 if (!ep)
2879 return -EINVAL;
2880
2881 ev->r.retcode = transport->ep_poll(ep,
2882 ev->u.ep_poll.timeout_ms);
2883 break;
2884 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2885 rc = iscsi_if_ep_disconnect(transport,
2886 ev->u.ep_disconnect.ep_handle);
2887 break;
2888 }
2889 return rc;
2890 }
2891
2892 static int
2893 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2894 struct iscsi_uevent *ev)
2895 {
2896 struct Scsi_Host *shost;
2897 struct sockaddr *dst_addr;
2898 int err;
2899
2900 if (!transport->tgt_dscvr)
2901 return -EINVAL;
2902
2903 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2904 if (!shost) {
2905 printk(KERN_ERR "target discovery could not find host no %u\n",
2906 ev->u.tgt_dscvr.host_no);
2907 return -ENODEV;
2908 }
2909
2910
2911 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2912 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2913 ev->u.tgt_dscvr.enable, dst_addr);
2914 scsi_host_put(shost);
2915 return err;
2916 }
2917
2918 static int
2919 iscsi_set_host_param(struct iscsi_transport *transport,
2920 struct iscsi_uevent *ev)
2921 {
2922 char *data = (char*)ev + sizeof(*ev);
2923 struct Scsi_Host *shost;
2924 int err;
2925
2926 if (!transport->set_host_param)
2927 return -ENOSYS;
2928
2929 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2930 if (!shost) {
2931 printk(KERN_ERR "set_host_param could not find host no %u\n",
2932 ev->u.set_host_param.host_no);
2933 return -ENODEV;
2934 }
2935
2936 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2937 data, ev->u.set_host_param.len);
2938 scsi_host_put(shost);
2939 return err;
2940 }
2941
2942 static int
2943 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2944 {
2945 struct Scsi_Host *shost;
2946 struct iscsi_path *params;
2947 int err;
2948
2949 if (!transport->set_path)
2950 return -ENOSYS;
2951
2952 shost = scsi_host_lookup(ev->u.set_path.host_no);
2953 if (!shost) {
2954 printk(KERN_ERR "set path could not find host no %u\n",
2955 ev->u.set_path.host_no);
2956 return -ENODEV;
2957 }
2958
2959 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2960 err = transport->set_path(shost, params);
2961
2962 scsi_host_put(shost);
2963 return err;
2964 }
2965
2966 static int
2967 iscsi_set_iface_params(struct iscsi_transport *transport,
2968 struct iscsi_uevent *ev, uint32_t len)
2969 {
2970 char *data = (char *)ev + sizeof(*ev);
2971 struct Scsi_Host *shost;
2972 int err;
2973
2974 if (!transport->set_iface_param)
2975 return -ENOSYS;
2976
2977 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2978 if (!shost) {
2979 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2980 ev->u.set_iface_params.host_no);
2981 return -ENODEV;
2982 }
2983
2984 err = transport->set_iface_param(shost, data, len);
2985 scsi_host_put(shost);
2986 return err;
2987 }
2988
2989 static int
2990 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2991 {
2992 struct Scsi_Host *shost;
2993 struct sockaddr *dst_addr;
2994 int err;
2995
2996 if (!transport->send_ping)
2997 return -ENOSYS;
2998
2999 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3000 if (!shost) {
3001 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3002 ev->u.iscsi_ping.host_no);
3003 return -ENODEV;
3004 }
3005
3006 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3007 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3008 ev->u.iscsi_ping.iface_type,
3009 ev->u.iscsi_ping.payload_size,
3010 ev->u.iscsi_ping.pid,
3011 dst_addr);
3012 scsi_host_put(shost);
3013 return err;
3014 }
3015
3016 static int
3017 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3018 {
3019 struct iscsi_uevent *ev = nlmsg_data(nlh);
3020 struct Scsi_Host *shost = NULL;
3021 struct iscsi_chap_rec *chap_rec;
3022 struct iscsi_internal *priv;
3023 struct sk_buff *skbchap;
3024 struct nlmsghdr *nlhchap;
3025 struct iscsi_uevent *evchap;
3026 uint32_t chap_buf_size;
3027 int len, err = 0;
3028 char *buf;
3029
3030 if (!transport->get_chap)
3031 return -EINVAL;
3032
3033 priv = iscsi_if_transport_lookup(transport);
3034 if (!priv)
3035 return -EINVAL;
3036
3037 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3038 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3039
3040 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3041 if (!shost) {
3042 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3043 __func__, ev->u.get_chap.host_no);
3044 return -ENODEV;
3045 }
3046
3047 do {
3048 int actual_size;
3049
3050 skbchap = alloc_skb(len, GFP_KERNEL);
3051 if (!skbchap) {
3052 printk(KERN_ERR "can not deliver chap: OOM\n");
3053 err = -ENOMEM;
3054 goto exit_get_chap;
3055 }
3056
3057 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3058 (len - sizeof(*nlhchap)), 0);
3059 evchap = nlmsg_data(nlhchap);
3060 memset(evchap, 0, sizeof(*evchap));
3061 evchap->transport_handle = iscsi_handle(transport);
3062 evchap->type = nlh->nlmsg_type;
3063 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3064 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3065 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3066 buf = (char *)evchap + sizeof(*evchap);
3067 memset(buf, 0, chap_buf_size);
3068
3069 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3070 &evchap->u.get_chap.num_entries, buf);
3071
3072 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3073 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3074 nlhchap->nlmsg_len = actual_size;
3075
3076 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3077 GFP_KERNEL);
3078 } while (err < 0 && err != -ECONNREFUSED);
3079
3080 exit_get_chap:
3081 scsi_host_put(shost);
3082 return err;
3083 }
3084
3085 static int iscsi_set_chap(struct iscsi_transport *transport,
3086 struct iscsi_uevent *ev, uint32_t len)
3087 {
3088 char *data = (char *)ev + sizeof(*ev);
3089 struct Scsi_Host *shost;
3090 int err = 0;
3091
3092 if (!transport->set_chap)
3093 return -ENOSYS;
3094
3095 shost = scsi_host_lookup(ev->u.set_path.host_no);
3096 if (!shost) {
3097 pr_err("%s could not find host no %u\n",
3098 __func__, ev->u.set_path.host_no);
3099 return -ENODEV;
3100 }
3101
3102 err = transport->set_chap(shost, data, len);
3103 scsi_host_put(shost);
3104 return err;
3105 }
3106
3107 static int iscsi_delete_chap(struct iscsi_transport *transport,
3108 struct iscsi_uevent *ev)
3109 {
3110 struct Scsi_Host *shost;
3111 int err = 0;
3112
3113 if (!transport->delete_chap)
3114 return -ENOSYS;
3115
3116 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3117 if (!shost) {
3118 printk(KERN_ERR "%s could not find host no %u\n",
3119 __func__, ev->u.delete_chap.host_no);
3120 return -ENODEV;
3121 }
3122
3123 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3124 scsi_host_put(shost);
3125 return err;
3126 }
3127
3128 static const struct {
3129 enum iscsi_discovery_parent_type value;
3130 char *name;
3131 } iscsi_discovery_parent_names[] = {
3132 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3133 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3134 {ISCSI_DISC_PARENT_ISNS, "isns" },
3135 };
3136
3137 char *iscsi_get_discovery_parent_name(int parent_type)
3138 {
3139 int i;
3140 char *state = "Unknown!";
3141
3142 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3143 if (iscsi_discovery_parent_names[i].value & parent_type) {
3144 state = iscsi_discovery_parent_names[i].name;
3145 break;
3146 }
3147 }
3148 return state;
3149 }
3150 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3151
3152 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3153 struct iscsi_uevent *ev, uint32_t len)
3154 {
3155 char *data = (char *)ev + sizeof(*ev);
3156 struct Scsi_Host *shost;
3157 struct iscsi_bus_flash_session *fnode_sess;
3158 struct iscsi_bus_flash_conn *fnode_conn;
3159 struct device *dev;
3160 uint32_t idx;
3161 int err = 0;
3162
3163 if (!transport->set_flashnode_param) {
3164 err = -ENOSYS;
3165 goto exit_set_fnode;
3166 }
3167
3168 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3169 if (!shost) {
3170 pr_err("%s could not find host no %u\n",
3171 __func__, ev->u.set_flashnode.host_no);
3172 err = -ENODEV;
3173 goto put_host;
3174 }
3175
3176 idx = ev->u.set_flashnode.flashnode_idx;
3177 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3178 if (!fnode_sess) {
3179 pr_err("%s could not find flashnode %u for host no %u\n",
3180 __func__, idx, ev->u.set_flashnode.host_no);
3181 err = -ENODEV;
3182 goto put_host;
3183 }
3184
3185 dev = iscsi_find_flashnode_conn(fnode_sess);
3186 if (!dev) {
3187 err = -ENODEV;
3188 goto put_sess;
3189 }
3190
3191 fnode_conn = iscsi_dev_to_flash_conn(dev);
3192 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3193 put_device(dev);
3194
3195 put_sess:
3196 put_device(&fnode_sess->dev);
3197
3198 put_host:
3199 scsi_host_put(shost);
3200
3201 exit_set_fnode:
3202 return err;
3203 }
3204
3205 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3206 struct iscsi_uevent *ev, uint32_t len)
3207 {
3208 char *data = (char *)ev + sizeof(*ev);
3209 struct Scsi_Host *shost;
3210 int index;
3211 int err = 0;
3212
3213 if (!transport->new_flashnode) {
3214 err = -ENOSYS;
3215 goto exit_new_fnode;
3216 }
3217
3218 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3219 if (!shost) {
3220 pr_err("%s could not find host no %u\n",
3221 __func__, ev->u.new_flashnode.host_no);
3222 err = -ENODEV;
3223 goto put_host;
3224 }
3225
3226 index = transport->new_flashnode(shost, data, len);
3227
3228 if (index >= 0)
3229 ev->r.new_flashnode_ret.flashnode_idx = index;
3230 else
3231 err = -EIO;
3232
3233 put_host:
3234 scsi_host_put(shost);
3235
3236 exit_new_fnode:
3237 return err;
3238 }
3239
3240 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3241 struct iscsi_uevent *ev)
3242 {
3243 struct Scsi_Host *shost;
3244 struct iscsi_bus_flash_session *fnode_sess;
3245 uint32_t idx;
3246 int err = 0;
3247
3248 if (!transport->del_flashnode) {
3249 err = -ENOSYS;
3250 goto exit_del_fnode;
3251 }
3252
3253 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3254 if (!shost) {
3255 pr_err("%s could not find host no %u\n",
3256 __func__, ev->u.del_flashnode.host_no);
3257 err = -ENODEV;
3258 goto put_host;
3259 }
3260
3261 idx = ev->u.del_flashnode.flashnode_idx;
3262 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3263 if (!fnode_sess) {
3264 pr_err("%s could not find flashnode %u for host no %u\n",
3265 __func__, idx, ev->u.del_flashnode.host_no);
3266 err = -ENODEV;
3267 goto put_host;
3268 }
3269
3270 err = transport->del_flashnode(fnode_sess);
3271 put_device(&fnode_sess->dev);
3272
3273 put_host:
3274 scsi_host_put(shost);
3275
3276 exit_del_fnode:
3277 return err;
3278 }
3279
3280 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3281 struct iscsi_uevent *ev)
3282 {
3283 struct Scsi_Host *shost;
3284 struct iscsi_bus_flash_session *fnode_sess;
3285 struct iscsi_bus_flash_conn *fnode_conn;
3286 struct device *dev;
3287 uint32_t idx;
3288 int err = 0;
3289
3290 if (!transport->login_flashnode) {
3291 err = -ENOSYS;
3292 goto exit_login_fnode;
3293 }
3294
3295 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3296 if (!shost) {
3297 pr_err("%s could not find host no %u\n",
3298 __func__, ev->u.login_flashnode.host_no);
3299 err = -ENODEV;
3300 goto put_host;
3301 }
3302
3303 idx = ev->u.login_flashnode.flashnode_idx;
3304 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3305 if (!fnode_sess) {
3306 pr_err("%s could not find flashnode %u for host no %u\n",
3307 __func__, idx, ev->u.login_flashnode.host_no);
3308 err = -ENODEV;
3309 goto put_host;
3310 }
3311
3312 dev = iscsi_find_flashnode_conn(fnode_sess);
3313 if (!dev) {
3314 err = -ENODEV;
3315 goto put_sess;
3316 }
3317
3318 fnode_conn = iscsi_dev_to_flash_conn(dev);
3319 err = transport->login_flashnode(fnode_sess, fnode_conn);
3320 put_device(dev);
3321
3322 put_sess:
3323 put_device(&fnode_sess->dev);
3324
3325 put_host:
3326 scsi_host_put(shost);
3327
3328 exit_login_fnode:
3329 return err;
3330 }
3331
3332 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3333 struct iscsi_uevent *ev)
3334 {
3335 struct Scsi_Host *shost;
3336 struct iscsi_bus_flash_session *fnode_sess;
3337 struct iscsi_bus_flash_conn *fnode_conn;
3338 struct device *dev;
3339 uint32_t idx;
3340 int err = 0;
3341
3342 if (!transport->logout_flashnode) {
3343 err = -ENOSYS;
3344 goto exit_logout_fnode;
3345 }
3346
3347 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3348 if (!shost) {
3349 pr_err("%s could not find host no %u\n",
3350 __func__, ev->u.logout_flashnode.host_no);
3351 err = -ENODEV;
3352 goto put_host;
3353 }
3354
3355 idx = ev->u.logout_flashnode.flashnode_idx;
3356 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3357 if (!fnode_sess) {
3358 pr_err("%s could not find flashnode %u for host no %u\n",
3359 __func__, idx, ev->u.logout_flashnode.host_no);
3360 err = -ENODEV;
3361 goto put_host;
3362 }
3363
3364 dev = iscsi_find_flashnode_conn(fnode_sess);
3365 if (!dev) {
3366 err = -ENODEV;
3367 goto put_sess;
3368 }
3369
3370 fnode_conn = iscsi_dev_to_flash_conn(dev);
3371
3372 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3373 put_device(dev);
3374
3375 put_sess:
3376 put_device(&fnode_sess->dev);
3377
3378 put_host:
3379 scsi_host_put(shost);
3380
3381 exit_logout_fnode:
3382 return err;
3383 }
3384
3385 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3386 struct iscsi_uevent *ev)
3387 {
3388 struct Scsi_Host *shost;
3389 struct iscsi_cls_session *session;
3390 int err = 0;
3391
3392 if (!transport->logout_flashnode_sid) {
3393 err = -ENOSYS;
3394 goto exit_logout_sid;
3395 }
3396
3397 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3398 if (!shost) {
3399 pr_err("%s could not find host no %u\n",
3400 __func__, ev->u.logout_flashnode.host_no);
3401 err = -ENODEV;
3402 goto put_host;
3403 }
3404
3405 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3406 if (!session) {
3407 pr_err("%s could not find session id %u\n",
3408 __func__, ev->u.logout_flashnode_sid.sid);
3409 err = -EINVAL;
3410 goto put_host;
3411 }
3412
3413 err = transport->logout_flashnode_sid(session);
3414
3415 put_host:
3416 scsi_host_put(shost);
3417
3418 exit_logout_sid:
3419 return err;
3420 }
3421
3422 static int
3423 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3424 {
3425 struct iscsi_uevent *ev = nlmsg_data(nlh);
3426 struct Scsi_Host *shost = NULL;
3427 struct iscsi_internal *priv;
3428 struct sk_buff *skbhost_stats;
3429 struct nlmsghdr *nlhhost_stats;
3430 struct iscsi_uevent *evhost_stats;
3431 int host_stats_size = 0;
3432 int len, err = 0;
3433 char *buf;
3434
3435 if (!transport->get_host_stats)
3436 return -ENOSYS;
3437
3438 priv = iscsi_if_transport_lookup(transport);
3439 if (!priv)
3440 return -EINVAL;
3441
3442 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3443 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3444
3445 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3446 if (!shost) {
3447 pr_err("%s: failed. Cound not find host no %u\n",
3448 __func__, ev->u.get_host_stats.host_no);
3449 return -ENODEV;
3450 }
3451
3452 do {
3453 int actual_size;
3454
3455 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3456 if (!skbhost_stats) {
3457 pr_err("cannot deliver host stats: OOM\n");
3458 err = -ENOMEM;
3459 goto exit_host_stats;
3460 }
3461
3462 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3463 (len - sizeof(*nlhhost_stats)), 0);
3464 evhost_stats = nlmsg_data(nlhhost_stats);
3465 memset(evhost_stats, 0, sizeof(*evhost_stats));
3466 evhost_stats->transport_handle = iscsi_handle(transport);
3467 evhost_stats->type = nlh->nlmsg_type;
3468 evhost_stats->u.get_host_stats.host_no =
3469 ev->u.get_host_stats.host_no;
3470 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3471 memset(buf, 0, host_stats_size);
3472
3473 err = transport->get_host_stats(shost, buf, host_stats_size);
3474 if (err) {
3475 kfree_skb(skbhost_stats);
3476 goto exit_host_stats;
3477 }
3478
3479 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3480 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3481 nlhhost_stats->nlmsg_len = actual_size;
3482
3483 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3484 GFP_KERNEL);
3485 } while (err < 0 && err != -ECONNREFUSED);
3486
3487 exit_host_stats:
3488 scsi_host_put(shost);
3489 return err;
3490 }
3491
3492
3493 static int
3494 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3495 {
3496 int err = 0;
3497 struct iscsi_uevent *ev = nlmsg_data(nlh);
3498 struct iscsi_transport *transport = NULL;
3499 struct iscsi_internal *priv;
3500 struct iscsi_cls_session *session;
3501 struct iscsi_cls_conn *conn;
3502 struct iscsi_endpoint *ep = NULL;
3503
3504 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3505 *group = ISCSI_NL_GRP_UIP;
3506 else
3507 *group = ISCSI_NL_GRP_ISCSID;
3508
3509 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3510 if (!priv)
3511 return -EINVAL;
3512 transport = priv->iscsi_transport;
3513
3514 if (!try_module_get(transport->owner))
3515 return -EINVAL;
3516
3517 switch (nlh->nlmsg_type) {
3518 case ISCSI_UEVENT_CREATE_SESSION:
3519 err = iscsi_if_create_session(priv, ep, ev,
3520 NETLINK_CB(skb).portid,
3521 ev->u.c_session.initial_cmdsn,
3522 ev->u.c_session.cmds_max,
3523 ev->u.c_session.queue_depth);
3524 break;
3525 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3526 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3527 if (!ep) {
3528 err = -EINVAL;
3529 break;
3530 }
3531
3532 err = iscsi_if_create_session(priv, ep, ev,
3533 NETLINK_CB(skb).portid,
3534 ev->u.c_bound_session.initial_cmdsn,
3535 ev->u.c_bound_session.cmds_max,
3536 ev->u.c_bound_session.queue_depth);
3537 break;
3538 case ISCSI_UEVENT_DESTROY_SESSION:
3539 session = iscsi_session_lookup(ev->u.d_session.sid);
3540 if (session)
3541 transport->destroy_session(session);
3542 else
3543 err = -EINVAL;
3544 break;
3545 case ISCSI_UEVENT_UNBIND_SESSION:
3546 session = iscsi_session_lookup(ev->u.d_session.sid);
3547 if (session)
3548 scsi_queue_work(iscsi_session_to_shost(session),
3549 &session->unbind_work);
3550 else
3551 err = -EINVAL;
3552 break;
3553 case ISCSI_UEVENT_CREATE_CONN:
3554 err = iscsi_if_create_conn(transport, ev);
3555 break;
3556 case ISCSI_UEVENT_DESTROY_CONN:
3557 err = iscsi_if_destroy_conn(transport, ev);
3558 break;
3559 case ISCSI_UEVENT_BIND_CONN:
3560 session = iscsi_session_lookup(ev->u.b_conn.sid);
3561 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3562
3563 if (conn && conn->ep)
3564 iscsi_if_ep_disconnect(transport, conn->ep->id);
3565
3566 if (!session || !conn) {
3567 err = -EINVAL;
3568 break;
3569 }
3570
3571 ev->r.retcode = transport->bind_conn(session, conn,
3572 ev->u.b_conn.transport_eph,
3573 ev->u.b_conn.is_leading);
3574 if (ev->r.retcode || !transport->ep_connect)
3575 break;
3576
3577 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3578 if (ep) {
3579 ep->conn = conn;
3580
3581 mutex_lock(&conn->ep_mutex);
3582 conn->ep = ep;
3583 mutex_unlock(&conn->ep_mutex);
3584 } else
3585 iscsi_cls_conn_printk(KERN_ERR, conn,
3586 "Could not set ep conn "
3587 "binding\n");
3588 break;
3589 case ISCSI_UEVENT_SET_PARAM:
3590 err = iscsi_set_param(transport, ev);
3591 break;
3592 case ISCSI_UEVENT_START_CONN:
3593 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3594 if (conn)
3595 ev->r.retcode = transport->start_conn(conn);
3596 else
3597 err = -EINVAL;
3598 break;
3599 case ISCSI_UEVENT_STOP_CONN:
3600 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3601 if (conn)
3602 transport->stop_conn(conn, ev->u.stop_conn.flag);
3603 else
3604 err = -EINVAL;
3605 break;
3606 case ISCSI_UEVENT_SEND_PDU:
3607 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3608 if (conn)
3609 ev->r.retcode = transport->send_pdu(conn,
3610 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3611 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3612 ev->u.send_pdu.data_size);
3613 else
3614 err = -EINVAL;
3615 break;
3616 case ISCSI_UEVENT_GET_STATS:
3617 err = iscsi_if_get_stats(transport, nlh);
3618 break;
3619 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3620 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3621 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3622 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3623 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3624 break;
3625 case ISCSI_UEVENT_TGT_DSCVR:
3626 err = iscsi_tgt_dscvr(transport, ev);
3627 break;
3628 case ISCSI_UEVENT_SET_HOST_PARAM:
3629 err = iscsi_set_host_param(transport, ev);
3630 break;
3631 case ISCSI_UEVENT_PATH_UPDATE:
3632 err = iscsi_set_path(transport, ev);
3633 break;
3634 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3635 err = iscsi_set_iface_params(transport, ev,
3636 nlmsg_attrlen(nlh, sizeof(*ev)));
3637 break;
3638 case ISCSI_UEVENT_PING:
3639 err = iscsi_send_ping(transport, ev);
3640 break;
3641 case ISCSI_UEVENT_GET_CHAP:
3642 err = iscsi_get_chap(transport, nlh);
3643 break;
3644 case ISCSI_UEVENT_DELETE_CHAP:
3645 err = iscsi_delete_chap(transport, ev);
3646 break;
3647 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3648 err = iscsi_set_flashnode_param(transport, ev,
3649 nlmsg_attrlen(nlh,
3650 sizeof(*ev)));
3651 break;
3652 case ISCSI_UEVENT_NEW_FLASHNODE:
3653 err = iscsi_new_flashnode(transport, ev,
3654 nlmsg_attrlen(nlh, sizeof(*ev)));
3655 break;
3656 case ISCSI_UEVENT_DEL_FLASHNODE:
3657 err = iscsi_del_flashnode(transport, ev);
3658 break;
3659 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3660 err = iscsi_login_flashnode(transport, ev);
3661 break;
3662 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3663 err = iscsi_logout_flashnode(transport, ev);
3664 break;
3665 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3666 err = iscsi_logout_flashnode_sid(transport, ev);
3667 break;
3668 case ISCSI_UEVENT_SET_CHAP:
3669 err = iscsi_set_chap(transport, ev,
3670 nlmsg_attrlen(nlh, sizeof(*ev)));
3671 break;
3672 case ISCSI_UEVENT_GET_HOST_STATS:
3673 err = iscsi_get_host_stats(transport, nlh);
3674 break;
3675 default:
3676 err = -ENOSYS;
3677 break;
3678 }
3679
3680 module_put(transport->owner);
3681 return err;
3682 }
3683
3684 /*
3685 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3686 * Malformed skbs with wrong lengths or invalid creds are not processed.
3687 */
3688 static void
3689 iscsi_if_rx(struct sk_buff *skb)
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) ||
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(group, nlh->nlmsg_seq,
3727 nlh->nlmsg_type, 0, 0, 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 };
4312
4313 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4314 {
4315 int i;
4316 char *speed = "Unknown!";
4317 struct iscsi_cls_host *ihost = shost->shost_data;
4318 uint32_t port_speed = ihost->port_speed;
4319
4320 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4321 if (iscsi_port_speed_names[i].value & port_speed) {
4322 speed = iscsi_port_speed_names[i].name;
4323 break;
4324 }
4325 }
4326 return speed;
4327 }
4328 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4329
4330 /* convert iscsi_port_state values to ascii string name */
4331 static const struct {
4332 enum iscsi_port_state value;
4333 char *name;
4334 } iscsi_port_state_names[] = {
4335 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4336 {ISCSI_PORT_STATE_UP, "LINK UP" },
4337 };
4338
4339 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4340 {
4341 int i;
4342 char *state = "Unknown!";
4343 struct iscsi_cls_host *ihost = shost->shost_data;
4344 uint32_t port_state = ihost->port_state;
4345
4346 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4347 if (iscsi_port_state_names[i].value & port_state) {
4348 state = iscsi_port_state_names[i].name;
4349 break;
4350 }
4351 }
4352 return state;
4353 }
4354 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4355
4356 static int iscsi_session_match(struct attribute_container *cont,
4357 struct device *dev)
4358 {
4359 struct iscsi_cls_session *session;
4360 struct Scsi_Host *shost;
4361 struct iscsi_internal *priv;
4362
4363 if (!iscsi_is_session_dev(dev))
4364 return 0;
4365
4366 session = iscsi_dev_to_session(dev);
4367 shost = iscsi_session_to_shost(session);
4368 if (!shost->transportt)
4369 return 0;
4370
4371 priv = to_iscsi_internal(shost->transportt);
4372 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4373 return 0;
4374
4375 return &priv->session_cont.ac == cont;
4376 }
4377
4378 static int iscsi_conn_match(struct attribute_container *cont,
4379 struct device *dev)
4380 {
4381 struct iscsi_cls_session *session;
4382 struct iscsi_cls_conn *conn;
4383 struct Scsi_Host *shost;
4384 struct iscsi_internal *priv;
4385
4386 if (!iscsi_is_conn_dev(dev))
4387 return 0;
4388
4389 conn = iscsi_dev_to_conn(dev);
4390 session = iscsi_dev_to_session(conn->dev.parent);
4391 shost = iscsi_session_to_shost(session);
4392
4393 if (!shost->transportt)
4394 return 0;
4395
4396 priv = to_iscsi_internal(shost->transportt);
4397 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4398 return 0;
4399
4400 return &priv->conn_cont.ac == cont;
4401 }
4402
4403 static int iscsi_host_match(struct attribute_container *cont,
4404 struct device *dev)
4405 {
4406 struct Scsi_Host *shost;
4407 struct iscsi_internal *priv;
4408
4409 if (!scsi_is_host_device(dev))
4410 return 0;
4411
4412 shost = dev_to_shost(dev);
4413 if (!shost->transportt ||
4414 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4415 return 0;
4416
4417 priv = to_iscsi_internal(shost->transportt);
4418 return &priv->t.host_attrs.ac == cont;
4419 }
4420
4421 struct scsi_transport_template *
4422 iscsi_register_transport(struct iscsi_transport *tt)
4423 {
4424 struct iscsi_internal *priv;
4425 unsigned long flags;
4426 int err;
4427
4428 BUG_ON(!tt);
4429
4430 priv = iscsi_if_transport_lookup(tt);
4431 if (priv)
4432 return NULL;
4433
4434 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4435 if (!priv)
4436 return NULL;
4437 INIT_LIST_HEAD(&priv->list);
4438 priv->iscsi_transport = tt;
4439 priv->t.user_scan = iscsi_user_scan;
4440 priv->t.create_work_queue = 1;
4441
4442 priv->dev.class = &iscsi_transport_class;
4443 dev_set_name(&priv->dev, "%s", tt->name);
4444 err = device_register(&priv->dev);
4445 if (err)
4446 goto free_priv;
4447
4448 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4449 if (err)
4450 goto unregister_dev;
4451
4452 /* host parameters */
4453 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4454 priv->t.host_attrs.ac.match = iscsi_host_match;
4455 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4456 priv->t.host_size = sizeof(struct iscsi_cls_host);
4457 transport_container_register(&priv->t.host_attrs);
4458
4459 /* connection parameters */
4460 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4461 priv->conn_cont.ac.match = iscsi_conn_match;
4462 priv->conn_cont.ac.grp = &iscsi_conn_group;
4463 transport_container_register(&priv->conn_cont);
4464
4465 /* session parameters */
4466 priv->session_cont.ac.class = &iscsi_session_class.class;
4467 priv->session_cont.ac.match = iscsi_session_match;
4468 priv->session_cont.ac.grp = &iscsi_session_group;
4469 transport_container_register(&priv->session_cont);
4470
4471 spin_lock_irqsave(&iscsi_transport_lock, flags);
4472 list_add(&priv->list, &iscsi_transports);
4473 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4474
4475 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4476 return &priv->t;
4477
4478 unregister_dev:
4479 device_unregister(&priv->dev);
4480 return NULL;
4481 free_priv:
4482 kfree(priv);
4483 return NULL;
4484 }
4485 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4486
4487 int iscsi_unregister_transport(struct iscsi_transport *tt)
4488 {
4489 struct iscsi_internal *priv;
4490 unsigned long flags;
4491
4492 BUG_ON(!tt);
4493
4494 mutex_lock(&rx_queue_mutex);
4495
4496 priv = iscsi_if_transport_lookup(tt);
4497 BUG_ON (!priv);
4498
4499 spin_lock_irqsave(&iscsi_transport_lock, flags);
4500 list_del(&priv->list);
4501 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4502
4503 transport_container_unregister(&priv->conn_cont);
4504 transport_container_unregister(&priv->session_cont);
4505 transport_container_unregister(&priv->t.host_attrs);
4506
4507 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4508 device_unregister(&priv->dev);
4509 mutex_unlock(&rx_queue_mutex);
4510
4511 return 0;
4512 }
4513 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4514
4515 static __init int iscsi_transport_init(void)
4516 {
4517 int err;
4518 struct netlink_kernel_cfg cfg = {
4519 .groups = 1,
4520 .input = iscsi_if_rx,
4521 };
4522 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4523 ISCSI_TRANSPORT_VERSION);
4524
4525 atomic_set(&iscsi_session_nr, 0);
4526
4527 err = class_register(&iscsi_transport_class);
4528 if (err)
4529 return err;
4530
4531 err = class_register(&iscsi_endpoint_class);
4532 if (err)
4533 goto unregister_transport_class;
4534
4535 err = class_register(&iscsi_iface_class);
4536 if (err)
4537 goto unregister_endpoint_class;
4538
4539 err = transport_class_register(&iscsi_host_class);
4540 if (err)
4541 goto unregister_iface_class;
4542
4543 err = transport_class_register(&iscsi_connection_class);
4544 if (err)
4545 goto unregister_host_class;
4546
4547 err = transport_class_register(&iscsi_session_class);
4548 if (err)
4549 goto unregister_conn_class;
4550
4551 err = bus_register(&iscsi_flashnode_bus);
4552 if (err)
4553 goto unregister_session_class;
4554
4555 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4556 if (!nls) {
4557 err = -ENOBUFS;
4558 goto unregister_flashnode_bus;
4559 }
4560
4561 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4562 if (!iscsi_eh_timer_workq) {
4563 err = -ENOMEM;
4564 goto release_nls;
4565 }
4566
4567 return 0;
4568
4569 release_nls:
4570 netlink_kernel_release(nls);
4571 unregister_flashnode_bus:
4572 bus_unregister(&iscsi_flashnode_bus);
4573 unregister_session_class:
4574 transport_class_unregister(&iscsi_session_class);
4575 unregister_conn_class:
4576 transport_class_unregister(&iscsi_connection_class);
4577 unregister_host_class:
4578 transport_class_unregister(&iscsi_host_class);
4579 unregister_iface_class:
4580 class_unregister(&iscsi_iface_class);
4581 unregister_endpoint_class:
4582 class_unregister(&iscsi_endpoint_class);
4583 unregister_transport_class:
4584 class_unregister(&iscsi_transport_class);
4585 return err;
4586 }
4587
4588 static void __exit iscsi_transport_exit(void)
4589 {
4590 destroy_workqueue(iscsi_eh_timer_workq);
4591 netlink_kernel_release(nls);
4592 bus_unregister(&iscsi_flashnode_bus);
4593 transport_class_unregister(&iscsi_connection_class);
4594 transport_class_unregister(&iscsi_session_class);
4595 transport_class_unregister(&iscsi_host_class);
4596 class_unregister(&iscsi_endpoint_class);
4597 class_unregister(&iscsi_iface_class);
4598 class_unregister(&iscsi_transport_class);
4599 }
4600
4601 module_init(iscsi_transport_init);
4602 module_exit(iscsi_transport_exit);
4603
4604 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4605 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4606 "Alex Aizman <itn780@yahoo.com>");
4607 MODULE_DESCRIPTION("iSCSI Transport Interface");
4608 MODULE_LICENSE("GPL");
4609 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4610 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux kernel - Deliverables
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