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[mirror_ubuntu-jammy-kernel.git] / drivers / scsi / scsi_transport_iscsi.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * iSCSI transport class definitions
4 *
5 * Copyright (C) IBM Corporation, 2004
6 * Copyright (C) Mike Christie, 2004 - 2005
7 * Copyright (C) Dmitry Yusupov, 2004 - 2005
8 * Copyright (C) Alex Aizman, 2004 - 2005
9 */
10 #include <linux/module.h>
11 #include <linux/mutex.h>
12 #include <linux/slab.h>
13 #include <linux/bsg-lib.h>
14 #include <linux/idr.h>
15 #include <net/tcp.h>
16 #include <scsi/scsi.h>
17 #include <scsi/scsi_host.h>
18 #include <scsi/scsi_device.h>
19 #include <scsi/scsi_transport.h>
20 #include <scsi/scsi_transport_iscsi.h>
21 #include <scsi/iscsi_if.h>
22 #include <scsi/scsi_cmnd.h>
23 #include <scsi/scsi_bsg_iscsi.h>
24
25 #define ISCSI_TRANSPORT_VERSION "2.0-870"
26
27 #define ISCSI_SEND_MAX_ALLOWED 10
28
29 #define CREATE_TRACE_POINTS
30 #include <trace/events/iscsi.h>
31
32 /*
33 * Export tracepoint symbols to be used by other modules.
34 */
35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);
36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);
37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);
38 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);
39 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);
40
41 static int dbg_session;
42 module_param_named(debug_session, dbg_session, int,
43 S_IRUGO | S_IWUSR);
44 MODULE_PARM_DESC(debug_session,
45 "Turn on debugging for sessions in scsi_transport_iscsi "
46 "module. Set to 1 to turn on, and zero to turn off. Default "
47 "is off.");
48
49 static int dbg_conn;
50 module_param_named(debug_conn, dbg_conn, int,
51 S_IRUGO | S_IWUSR);
52 MODULE_PARM_DESC(debug_conn,
53 "Turn on debugging for connections in scsi_transport_iscsi "
54 "module. Set to 1 to turn on, and zero to turn off. Default "
55 "is off.");
56
57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
58 do { \
59 if (dbg_session) \
60 iscsi_cls_session_printk(KERN_INFO, _session, \
61 "%s: " dbg_fmt, \
62 __func__, ##arg); \
63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \
64 &(_session)->dev, \
65 "%s " dbg_fmt, __func__, ##arg); \
66 } while (0);
67
68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
69 do { \
70 if (dbg_conn) \
71 iscsi_cls_conn_printk(KERN_INFO, _conn, \
72 "%s: " dbg_fmt, \
73 __func__, ##arg); \
74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \
75 &(_conn)->dev, \
76 "%s " dbg_fmt, __func__, ##arg); \
77 } while (0);
78
79 struct iscsi_internal {
80 struct scsi_transport_template t;
81 struct iscsi_transport *iscsi_transport;
82 struct list_head list;
83 struct device dev;
84
85 struct transport_container conn_cont;
86 struct transport_container session_cont;
87 };
88
89 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
90 static struct workqueue_struct *iscsi_eh_timer_workq;
91
92 static struct workqueue_struct *iscsi_conn_cleanup_workq;
93
94 static DEFINE_IDA(iscsi_sess_ida);
95 /*
96 * list of registered transports and lock that must
97 * be held while accessing list. The iscsi_transport_lock must
98 * be acquired after the rx_queue_mutex.
99 */
100 static LIST_HEAD(iscsi_transports);
101 static DEFINE_SPINLOCK(iscsi_transport_lock);
102
103 #define to_iscsi_internal(tmpl) \
104 container_of(tmpl, struct iscsi_internal, t)
105
106 #define dev_to_iscsi_internal(_dev) \
107 container_of(_dev, struct iscsi_internal, dev)
108
109 static void iscsi_transport_release(struct device *dev)
110 {
111 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
112 kfree(priv);
113 }
114
115 /*
116 * iscsi_transport_class represents the iscsi_transports that are
117 * registered.
118 */
119 static struct class iscsi_transport_class = {
120 .name = "iscsi_transport",
121 .dev_release = iscsi_transport_release,
122 };
123
124 static ssize_t
125 show_transport_handle(struct device *dev, struct device_attribute *attr,
126 char *buf)
127 {
128 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
129
130 if (!capable(CAP_SYS_ADMIN))
131 return -EACCES;
132 return sysfs_emit(buf, "%llu\n",
133 (unsigned long long)iscsi_handle(priv->iscsi_transport));
134 }
135 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
136
137 #define show_transport_attr(name, format) \
138 static ssize_t \
139 show_transport_##name(struct device *dev, \
140 struct device_attribute *attr,char *buf) \
141 { \
142 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
143 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
144 } \
145 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
146
147 show_transport_attr(caps, "0x%x");
148
149 static struct attribute *iscsi_transport_attrs[] = {
150 &dev_attr_handle.attr,
151 &dev_attr_caps.attr,
152 NULL,
153 };
154
155 static struct attribute_group iscsi_transport_group = {
156 .attrs = iscsi_transport_attrs,
157 };
158
159 /*
160 * iSCSI endpoint attrs
161 */
162 #define iscsi_dev_to_endpoint(_dev) \
163 container_of(_dev, struct iscsi_endpoint, dev)
164
165 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
166 struct device_attribute dev_attr_##_prefix##_##_name = \
167 __ATTR(_name,_mode,_show,_store)
168
169 static void iscsi_endpoint_release(struct device *dev)
170 {
171 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
172 kfree(ep);
173 }
174
175 static struct class iscsi_endpoint_class = {
176 .name = "iscsi_endpoint",
177 .dev_release = iscsi_endpoint_release,
178 };
179
180 static ssize_t
181 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
182 {
183 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
184 return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id);
185 }
186 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
187
188 static struct attribute *iscsi_endpoint_attrs[] = {
189 &dev_attr_ep_handle.attr,
190 NULL,
191 };
192
193 static struct attribute_group iscsi_endpoint_group = {
194 .attrs = iscsi_endpoint_attrs,
195 };
196
197 #define ISCSI_MAX_EPID -1
198
199 static int iscsi_match_epid(struct device *dev, const void *data)
200 {
201 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
202 const uint64_t *epid = data;
203
204 return *epid == ep->id;
205 }
206
207 struct iscsi_endpoint *
208 iscsi_create_endpoint(int dd_size)
209 {
210 struct device *dev;
211 struct iscsi_endpoint *ep;
212 uint64_t id;
213 int err;
214
215 for (id = 1; id < ISCSI_MAX_EPID; id++) {
216 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
217 iscsi_match_epid);
218 if (!dev)
219 break;
220 else
221 put_device(dev);
222 }
223 if (id == ISCSI_MAX_EPID) {
224 printk(KERN_ERR "Too many connections. Max supported %u\n",
225 ISCSI_MAX_EPID - 1);
226 return NULL;
227 }
228
229 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
230 if (!ep)
231 return NULL;
232
233 ep->id = id;
234 ep->dev.class = &iscsi_endpoint_class;
235 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
236 err = device_register(&ep->dev);
237 if (err)
238 goto free_ep;
239
240 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
241 if (err)
242 goto unregister_dev;
243
244 if (dd_size)
245 ep->dd_data = &ep[1];
246 return ep;
247
248 unregister_dev:
249 device_unregister(&ep->dev);
250 return NULL;
251
252 free_ep:
253 kfree(ep);
254 return NULL;
255 }
256 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
257
258 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
259 {
260 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
261 device_unregister(&ep->dev);
262 }
263 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
264
265 void iscsi_put_endpoint(struct iscsi_endpoint *ep)
266 {
267 put_device(&ep->dev);
268 }
269 EXPORT_SYMBOL_GPL(iscsi_put_endpoint);
270
271 /**
272 * iscsi_lookup_endpoint - get ep from handle
273 * @handle: endpoint handle
274 *
275 * Caller must do a iscsi_put_endpoint.
276 */
277 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
278 {
279 struct device *dev;
280
281 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
282 iscsi_match_epid);
283 if (!dev)
284 return NULL;
285
286 return iscsi_dev_to_endpoint(dev);
287 }
288 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
289
290 /*
291 * Interface to display network param to sysfs
292 */
293
294 static void iscsi_iface_release(struct device *dev)
295 {
296 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
297 struct device *parent = iface->dev.parent;
298
299 kfree(iface);
300 put_device(parent);
301 }
302
303
304 static struct class iscsi_iface_class = {
305 .name = "iscsi_iface",
306 .dev_release = iscsi_iface_release,
307 };
308
309 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
310 struct device_attribute dev_attr_##_prefix##_##_name = \
311 __ATTR(_name, _mode, _show, _store)
312
313 /* iface attrs show */
314 #define iscsi_iface_attr_show(type, name, param_type, param) \
315 static ssize_t \
316 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
317 char *buf) \
318 { \
319 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
320 struct iscsi_transport *t = iface->transport; \
321 return t->get_iface_param(iface, param_type, param, buf); \
322 } \
323
324 #define iscsi_iface_net_attr(type, name, param) \
325 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
326 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
327
328 #define iscsi_iface_attr(type, name, param) \
329 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
330 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
331
332 /* generic read only ipv4 attribute */
333 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
334 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
335 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
336 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
337 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
338 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
339 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
340 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
341 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
342 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
343 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
344 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
345 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
346 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
347 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
348 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
349 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
350 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
351 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
352 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
353 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
354 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
355 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
356 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
357 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
358 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
359 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
360 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
361 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
362
363 /* generic read only ipv6 attribute */
364 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
365 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
366 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
367 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
368 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
369 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
370 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
371 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
372 iscsi_iface_net_attr(ipv6_iface, link_local_state,
373 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
374 iscsi_iface_net_attr(ipv6_iface, router_state,
375 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
376 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
377 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
378 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
379 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
380 iscsi_iface_net_attr(ipv6_iface, traffic_class,
381 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
382 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
383 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
384 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
385 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
386 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
387 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
388 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
389 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
390 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
391 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
392 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
393
394 /* common read only iface attribute */
395 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
396 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
397 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
398 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
399 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
400 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
401 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
402 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
403 iscsi_iface_net_attr(iface, tcp_nagle_disable,
404 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
405 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
406 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
407 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
408 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
409 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
410 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
411
412 /* common iscsi specific settings attributes */
413 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
414 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
415 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
416 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
417 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
418 iscsi_iface_attr(iface, data_seq_in_order,
419 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
420 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
421 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
422 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
423 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
424 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
425 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
426 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
427 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
428 iscsi_iface_attr(iface, discovery_auth_optional,
429 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
430 iscsi_iface_attr(iface, discovery_logout,
431 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
432 iscsi_iface_attr(iface, strict_login_comp_en,
433 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
434 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
435
436 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
437 struct attribute *attr, int i)
438 {
439 struct device *dev = container_of(kobj, struct device, kobj);
440 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
441 struct iscsi_transport *t = iface->transport;
442 int param = -1;
443
444 if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
445 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
446 else if (attr == &dev_attr_iface_header_digest.attr)
447 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
448 else if (attr == &dev_attr_iface_data_digest.attr)
449 param = ISCSI_IFACE_PARAM_DATADGST_EN;
450 else if (attr == &dev_attr_iface_immediate_data.attr)
451 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
452 else if (attr == &dev_attr_iface_initial_r2t.attr)
453 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
454 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
455 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
456 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
457 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
458 else if (attr == &dev_attr_iface_erl.attr)
459 param = ISCSI_IFACE_PARAM_ERL;
460 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
461 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
462 else if (attr == &dev_attr_iface_first_burst_len.attr)
463 param = ISCSI_IFACE_PARAM_FIRST_BURST;
464 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
465 param = ISCSI_IFACE_PARAM_MAX_R2T;
466 else if (attr == &dev_attr_iface_max_burst_len.attr)
467 param = ISCSI_IFACE_PARAM_MAX_BURST;
468 else if (attr == &dev_attr_iface_chap_auth.attr)
469 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
470 else if (attr == &dev_attr_iface_bidi_chap.attr)
471 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
472 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
473 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
474 else if (attr == &dev_attr_iface_discovery_logout.attr)
475 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
476 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
477 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
478 else if (attr == &dev_attr_iface_initiator_name.attr)
479 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
480
481 if (param != -1)
482 return t->attr_is_visible(ISCSI_IFACE_PARAM, param);
483
484 if (attr == &dev_attr_iface_enabled.attr)
485 param = ISCSI_NET_PARAM_IFACE_ENABLE;
486 else if (attr == &dev_attr_iface_vlan_id.attr)
487 param = ISCSI_NET_PARAM_VLAN_ID;
488 else if (attr == &dev_attr_iface_vlan_priority.attr)
489 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
490 else if (attr == &dev_attr_iface_vlan_enabled.attr)
491 param = ISCSI_NET_PARAM_VLAN_ENABLED;
492 else if (attr == &dev_attr_iface_mtu.attr)
493 param = ISCSI_NET_PARAM_MTU;
494 else if (attr == &dev_attr_iface_port.attr)
495 param = ISCSI_NET_PARAM_PORT;
496 else if (attr == &dev_attr_iface_ipaddress_state.attr)
497 param = ISCSI_NET_PARAM_IPADDR_STATE;
498 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
499 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
500 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
501 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
502 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
503 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
504 else if (attr == &dev_attr_iface_tcp_wsf.attr)
505 param = ISCSI_NET_PARAM_TCP_WSF;
506 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
507 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
508 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
509 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
510 else if (attr == &dev_attr_iface_cache_id.attr)
511 param = ISCSI_NET_PARAM_CACHE_ID;
512 else if (attr == &dev_attr_iface_redirect_en.attr)
513 param = ISCSI_NET_PARAM_REDIRECT_EN;
514 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
515 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
516 param = ISCSI_NET_PARAM_IPV4_ADDR;
517 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
518 param = ISCSI_NET_PARAM_IPV4_GW;
519 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
520 param = ISCSI_NET_PARAM_IPV4_SUBNET;
521 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
522 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
523 else if (attr ==
524 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
525 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
526 else if (attr ==
527 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
528 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
529 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
530 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
531 else if (attr == &dev_attr_ipv4_iface_tos.attr)
532 param = ISCSI_NET_PARAM_IPV4_TOS;
533 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
534 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
535 else if (attr ==
536 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
537 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
538 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
539 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
540 else if (attr ==
541 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
542 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
543 else if (attr ==
544 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
545 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
546 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
547 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
548 else if (attr ==
549 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
550 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
551 else if (attr ==
552 &dev_attr_ipv4_iface_fragment_disable.attr)
553 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
554 else if (attr ==
555 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
556 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
557 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
558 param = ISCSI_NET_PARAM_IPV4_TTL;
559 else
560 return 0;
561 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
562 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
563 param = ISCSI_NET_PARAM_IPV6_ADDR;
564 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
565 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
566 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
567 param = ISCSI_NET_PARAM_IPV6_ROUTER;
568 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
569 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
570 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
571 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
572 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
573 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
574 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
575 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
576 else if (attr ==
577 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
578 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
579 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
580 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
581 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
582 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
583 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
584 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
585 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
586 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
587 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
588 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
589 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
590 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
591 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
592 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
593 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
594 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
595 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
596 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
597 else
598 return 0;
599 } else {
600 WARN_ONCE(1, "Invalid iface attr");
601 return 0;
602 }
603
604 return t->attr_is_visible(ISCSI_NET_PARAM, param);
605 }
606
607 static struct attribute *iscsi_iface_attrs[] = {
608 &dev_attr_iface_enabled.attr,
609 &dev_attr_iface_vlan_id.attr,
610 &dev_attr_iface_vlan_priority.attr,
611 &dev_attr_iface_vlan_enabled.attr,
612 &dev_attr_ipv4_iface_ipaddress.attr,
613 &dev_attr_ipv4_iface_gateway.attr,
614 &dev_attr_ipv4_iface_subnet.attr,
615 &dev_attr_ipv4_iface_bootproto.attr,
616 &dev_attr_ipv6_iface_ipaddress.attr,
617 &dev_attr_ipv6_iface_link_local_addr.attr,
618 &dev_attr_ipv6_iface_router_addr.attr,
619 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
620 &dev_attr_ipv6_iface_link_local_autocfg.attr,
621 &dev_attr_iface_mtu.attr,
622 &dev_attr_iface_port.attr,
623 &dev_attr_iface_ipaddress_state.attr,
624 &dev_attr_iface_delayed_ack_en.attr,
625 &dev_attr_iface_tcp_nagle_disable.attr,
626 &dev_attr_iface_tcp_wsf_disable.attr,
627 &dev_attr_iface_tcp_wsf.attr,
628 &dev_attr_iface_tcp_timer_scale.attr,
629 &dev_attr_iface_tcp_timestamp_en.attr,
630 &dev_attr_iface_cache_id.attr,
631 &dev_attr_iface_redirect_en.attr,
632 &dev_attr_iface_def_taskmgmt_tmo.attr,
633 &dev_attr_iface_header_digest.attr,
634 &dev_attr_iface_data_digest.attr,
635 &dev_attr_iface_immediate_data.attr,
636 &dev_attr_iface_initial_r2t.attr,
637 &dev_attr_iface_data_seq_in_order.attr,
638 &dev_attr_iface_data_pdu_in_order.attr,
639 &dev_attr_iface_erl.attr,
640 &dev_attr_iface_max_recv_dlength.attr,
641 &dev_attr_iface_first_burst_len.attr,
642 &dev_attr_iface_max_outstanding_r2t.attr,
643 &dev_attr_iface_max_burst_len.attr,
644 &dev_attr_iface_chap_auth.attr,
645 &dev_attr_iface_bidi_chap.attr,
646 &dev_attr_iface_discovery_auth_optional.attr,
647 &dev_attr_iface_discovery_logout.attr,
648 &dev_attr_iface_strict_login_comp_en.attr,
649 &dev_attr_iface_initiator_name.attr,
650 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
651 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
652 &dev_attr_ipv4_iface_tos_en.attr,
653 &dev_attr_ipv4_iface_tos.attr,
654 &dev_attr_ipv4_iface_grat_arp_en.attr,
655 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
656 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
657 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
658 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
659 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
660 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
661 &dev_attr_ipv4_iface_fragment_disable.attr,
662 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
663 &dev_attr_ipv4_iface_ttl.attr,
664 &dev_attr_ipv6_iface_link_local_state.attr,
665 &dev_attr_ipv6_iface_router_state.attr,
666 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
667 &dev_attr_ipv6_iface_mld_en.attr,
668 &dev_attr_ipv6_iface_flow_label.attr,
669 &dev_attr_ipv6_iface_traffic_class.attr,
670 &dev_attr_ipv6_iface_hop_limit.attr,
671 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
672 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
673 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
674 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
675 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
676 NULL,
677 };
678
679 static struct attribute_group iscsi_iface_group = {
680 .attrs = iscsi_iface_attrs,
681 .is_visible = iscsi_iface_attr_is_visible,
682 };
683
684 /* convert iscsi_ipaddress_state values to ascii string name */
685 static const struct {
686 enum iscsi_ipaddress_state value;
687 char *name;
688 } iscsi_ipaddress_state_names[] = {
689 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
690 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
691 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
692 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
693 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
694 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
695 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
696 };
697
698 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
699 {
700 int i;
701 char *state = NULL;
702
703 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
704 if (iscsi_ipaddress_state_names[i].value == port_state) {
705 state = iscsi_ipaddress_state_names[i].name;
706 break;
707 }
708 }
709 return state;
710 }
711 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
712
713 /* convert iscsi_router_state values to ascii string name */
714 static const struct {
715 enum iscsi_router_state value;
716 char *name;
717 } iscsi_router_state_names[] = {
718 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
719 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
720 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
721 {ISCSI_ROUTER_STATE_STALE, "Stale" },
722 };
723
724 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
725 {
726 int i;
727 char *state = NULL;
728
729 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
730 if (iscsi_router_state_names[i].value == router_state) {
731 state = iscsi_router_state_names[i].name;
732 break;
733 }
734 }
735 return state;
736 }
737 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
738
739 struct iscsi_iface *
740 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
741 uint32_t iface_type, uint32_t iface_num, int dd_size)
742 {
743 struct iscsi_iface *iface;
744 int err;
745
746 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
747 if (!iface)
748 return NULL;
749
750 iface->transport = transport;
751 iface->iface_type = iface_type;
752 iface->iface_num = iface_num;
753 iface->dev.release = iscsi_iface_release;
754 iface->dev.class = &iscsi_iface_class;
755 /* parent reference released in iscsi_iface_release */
756 iface->dev.parent = get_device(&shost->shost_gendev);
757 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
758 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
759 iface_num);
760 else
761 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
762 iface_num);
763
764 err = device_register(&iface->dev);
765 if (err)
766 goto free_iface;
767
768 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
769 if (err)
770 goto unreg_iface;
771
772 if (dd_size)
773 iface->dd_data = &iface[1];
774 return iface;
775
776 unreg_iface:
777 device_unregister(&iface->dev);
778 return NULL;
779
780 free_iface:
781 put_device(iface->dev.parent);
782 kfree(iface);
783 return NULL;
784 }
785 EXPORT_SYMBOL_GPL(iscsi_create_iface);
786
787 void iscsi_destroy_iface(struct iscsi_iface *iface)
788 {
789 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
790 device_unregister(&iface->dev);
791 }
792 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
793
794 /*
795 * Interface to display flash node params to sysfs
796 */
797
798 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
799 struct device_attribute dev_attr_##_prefix##_##_name = \
800 __ATTR(_name, _mode, _show, _store)
801
802 /* flash node session attrs show */
803 #define iscsi_flashnode_sess_attr_show(type, name, param) \
804 static ssize_t \
805 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
806 char *buf) \
807 { \
808 struct iscsi_bus_flash_session *fnode_sess = \
809 iscsi_dev_to_flash_session(dev);\
810 struct iscsi_transport *t = fnode_sess->transport; \
811 return t->get_flashnode_param(fnode_sess, param, buf); \
812 } \
813
814
815 #define iscsi_flashnode_sess_attr(type, name, param) \
816 iscsi_flashnode_sess_attr_show(type, name, param) \
817 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
818 show_##type##_##name, NULL);
819
820 /* Flash node session attributes */
821
822 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
823 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
824 iscsi_flashnode_sess_attr(fnode, discovery_session,
825 ISCSI_FLASHNODE_DISCOVERY_SESS);
826 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
827 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
828 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
829 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
830 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
831 ISCSI_FLASHNODE_DATASEQ_INORDER);
832 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
833 ISCSI_FLASHNODE_PDU_INORDER);
834 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
835 iscsi_flashnode_sess_attr(fnode, discovery_logout,
836 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
837 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
838 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
839 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
840 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
841 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
842 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
843 iscsi_flashnode_sess_attr(fnode, def_time2retain,
844 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
845 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
846 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
847 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
848 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
849 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
850 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
851 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
852 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
853 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
854 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
855 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
856 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
857 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
858 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
859 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
860 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
861 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
862 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
863 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
864 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
865
866 static struct attribute *iscsi_flashnode_sess_attrs[] = {
867 &dev_attr_fnode_auto_snd_tgt_disable.attr,
868 &dev_attr_fnode_discovery_session.attr,
869 &dev_attr_fnode_portal_type.attr,
870 &dev_attr_fnode_entry_enable.attr,
871 &dev_attr_fnode_immediate_data.attr,
872 &dev_attr_fnode_initial_r2t.attr,
873 &dev_attr_fnode_data_seq_in_order.attr,
874 &dev_attr_fnode_data_pdu_in_order.attr,
875 &dev_attr_fnode_chap_auth.attr,
876 &dev_attr_fnode_discovery_logout.attr,
877 &dev_attr_fnode_bidi_chap.attr,
878 &dev_attr_fnode_discovery_auth_optional.attr,
879 &dev_attr_fnode_erl.attr,
880 &dev_attr_fnode_first_burst_len.attr,
881 &dev_attr_fnode_def_time2wait.attr,
882 &dev_attr_fnode_def_time2retain.attr,
883 &dev_attr_fnode_max_outstanding_r2t.attr,
884 &dev_attr_fnode_isid.attr,
885 &dev_attr_fnode_tsid.attr,
886 &dev_attr_fnode_max_burst_len.attr,
887 &dev_attr_fnode_def_taskmgmt_tmo.attr,
888 &dev_attr_fnode_targetalias.attr,
889 &dev_attr_fnode_targetname.attr,
890 &dev_attr_fnode_tpgt.attr,
891 &dev_attr_fnode_discovery_parent_idx.attr,
892 &dev_attr_fnode_discovery_parent_type.attr,
893 &dev_attr_fnode_chap_in_idx.attr,
894 &dev_attr_fnode_chap_out_idx.attr,
895 &dev_attr_fnode_username.attr,
896 &dev_attr_fnode_username_in.attr,
897 &dev_attr_fnode_password.attr,
898 &dev_attr_fnode_password_in.attr,
899 &dev_attr_fnode_is_boot_target.attr,
900 NULL,
901 };
902
903 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
904 struct attribute *attr,
905 int i)
906 {
907 struct device *dev = container_of(kobj, struct device, kobj);
908 struct iscsi_bus_flash_session *fnode_sess =
909 iscsi_dev_to_flash_session(dev);
910 struct iscsi_transport *t = fnode_sess->transport;
911 int param;
912
913 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
914 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
915 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
916 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
917 } else if (attr == &dev_attr_fnode_portal_type.attr) {
918 param = ISCSI_FLASHNODE_PORTAL_TYPE;
919 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
920 param = ISCSI_FLASHNODE_ENTRY_EN;
921 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
922 param = ISCSI_FLASHNODE_IMM_DATA_EN;
923 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
924 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
925 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
926 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
927 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
928 param = ISCSI_FLASHNODE_PDU_INORDER;
929 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
930 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
931 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
932 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
933 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
934 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
935 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
936 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
937 } else if (attr == &dev_attr_fnode_erl.attr) {
938 param = ISCSI_FLASHNODE_ERL;
939 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
940 param = ISCSI_FLASHNODE_FIRST_BURST;
941 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
942 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
943 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
944 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
945 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
946 param = ISCSI_FLASHNODE_MAX_R2T;
947 } else if (attr == &dev_attr_fnode_isid.attr) {
948 param = ISCSI_FLASHNODE_ISID;
949 } else if (attr == &dev_attr_fnode_tsid.attr) {
950 param = ISCSI_FLASHNODE_TSID;
951 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
952 param = ISCSI_FLASHNODE_MAX_BURST;
953 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
954 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
955 } else if (attr == &dev_attr_fnode_targetalias.attr) {
956 param = ISCSI_FLASHNODE_ALIAS;
957 } else if (attr == &dev_attr_fnode_targetname.attr) {
958 param = ISCSI_FLASHNODE_NAME;
959 } else if (attr == &dev_attr_fnode_tpgt.attr) {
960 param = ISCSI_FLASHNODE_TPGT;
961 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
962 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
963 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
964 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
965 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
966 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
967 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
968 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
969 } else if (attr == &dev_attr_fnode_username.attr) {
970 param = ISCSI_FLASHNODE_USERNAME;
971 } else if (attr == &dev_attr_fnode_username_in.attr) {
972 param = ISCSI_FLASHNODE_USERNAME_IN;
973 } else if (attr == &dev_attr_fnode_password.attr) {
974 param = ISCSI_FLASHNODE_PASSWORD;
975 } else if (attr == &dev_attr_fnode_password_in.attr) {
976 param = ISCSI_FLASHNODE_PASSWORD_IN;
977 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
978 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
979 } else {
980 WARN_ONCE(1, "Invalid flashnode session attr");
981 return 0;
982 }
983
984 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
985 }
986
987 static struct attribute_group iscsi_flashnode_sess_attr_group = {
988 .attrs = iscsi_flashnode_sess_attrs,
989 .is_visible = iscsi_flashnode_sess_attr_is_visible,
990 };
991
992 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
993 &iscsi_flashnode_sess_attr_group,
994 NULL,
995 };
996
997 static void iscsi_flashnode_sess_release(struct device *dev)
998 {
999 struct iscsi_bus_flash_session *fnode_sess =
1000 iscsi_dev_to_flash_session(dev);
1001
1002 kfree(fnode_sess->targetname);
1003 kfree(fnode_sess->targetalias);
1004 kfree(fnode_sess->portal_type);
1005 kfree(fnode_sess);
1006 }
1007
1008 static const struct device_type iscsi_flashnode_sess_dev_type = {
1009 .name = "iscsi_flashnode_sess_dev_type",
1010 .groups = iscsi_flashnode_sess_attr_groups,
1011 .release = iscsi_flashnode_sess_release,
1012 };
1013
1014 /* flash node connection attrs show */
1015 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1016 static ssize_t \
1017 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1018 char *buf) \
1019 { \
1020 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1021 struct iscsi_bus_flash_session *fnode_sess = \
1022 iscsi_flash_conn_to_flash_session(fnode_conn);\
1023 struct iscsi_transport *t = fnode_conn->transport; \
1024 return t->get_flashnode_param(fnode_sess, param, buf); \
1025 } \
1026
1027
1028 #define iscsi_flashnode_conn_attr(type, name, param) \
1029 iscsi_flashnode_conn_attr_show(type, name, param) \
1030 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1031 show_##type##_##name, NULL);
1032
1033 /* Flash node connection attributes */
1034
1035 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1036 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1037 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1038 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1039 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1040 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1041 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1042 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1043 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1044 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1045 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1046 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1047 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1048 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1049 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1050 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1051 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1052 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1053 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1054 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1055 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1056 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1057 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1058 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1059 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1060 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1061 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1062 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1063 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1064 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1065 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1066 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1067 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1068 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1069 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1070 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1071 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1072 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1073 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1074
1075 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1076 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1077 &dev_attr_fnode_header_digest.attr,
1078 &dev_attr_fnode_data_digest.attr,
1079 &dev_attr_fnode_snack_req.attr,
1080 &dev_attr_fnode_tcp_timestamp_stat.attr,
1081 &dev_attr_fnode_tcp_nagle_disable.attr,
1082 &dev_attr_fnode_tcp_wsf_disable.attr,
1083 &dev_attr_fnode_tcp_timer_scale.attr,
1084 &dev_attr_fnode_tcp_timestamp_enable.attr,
1085 &dev_attr_fnode_fragment_disable.attr,
1086 &dev_attr_fnode_max_recv_dlength.attr,
1087 &dev_attr_fnode_max_xmit_dlength.attr,
1088 &dev_attr_fnode_keepalive_tmo.attr,
1089 &dev_attr_fnode_port.attr,
1090 &dev_attr_fnode_ipaddress.attr,
1091 &dev_attr_fnode_redirect_ipaddr.attr,
1092 &dev_attr_fnode_max_segment_size.attr,
1093 &dev_attr_fnode_local_port.attr,
1094 &dev_attr_fnode_ipv4_tos.attr,
1095 &dev_attr_fnode_ipv6_traffic_class.attr,
1096 &dev_attr_fnode_ipv6_flow_label.attr,
1097 &dev_attr_fnode_link_local_ipv6.attr,
1098 &dev_attr_fnode_tcp_xmit_wsf.attr,
1099 &dev_attr_fnode_tcp_recv_wsf.attr,
1100 &dev_attr_fnode_statsn.attr,
1101 &dev_attr_fnode_exp_statsn.attr,
1102 NULL,
1103 };
1104
1105 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1106 struct attribute *attr,
1107 int i)
1108 {
1109 struct device *dev = container_of(kobj, struct device, kobj);
1110 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1111 struct iscsi_transport *t = fnode_conn->transport;
1112 int param;
1113
1114 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1115 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1116 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1117 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1118 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1119 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1120 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1121 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1122 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1123 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1124 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1125 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1126 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1127 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1128 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1129 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1130 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1131 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1132 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1133 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1134 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1135 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1136 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1137 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1138 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1139 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1140 } else if (attr == &dev_attr_fnode_port.attr) {
1141 param = ISCSI_FLASHNODE_PORT;
1142 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1143 param = ISCSI_FLASHNODE_IPADDR;
1144 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1145 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1146 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1147 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1148 } else if (attr == &dev_attr_fnode_local_port.attr) {
1149 param = ISCSI_FLASHNODE_LOCAL_PORT;
1150 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1151 param = ISCSI_FLASHNODE_IPV4_TOS;
1152 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1153 param = ISCSI_FLASHNODE_IPV6_TC;
1154 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1155 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1156 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1157 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1158 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1159 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1160 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1161 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1162 } else if (attr == &dev_attr_fnode_statsn.attr) {
1163 param = ISCSI_FLASHNODE_STATSN;
1164 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1165 param = ISCSI_FLASHNODE_EXP_STATSN;
1166 } else {
1167 WARN_ONCE(1, "Invalid flashnode connection attr");
1168 return 0;
1169 }
1170
1171 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1172 }
1173
1174 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1175 .attrs = iscsi_flashnode_conn_attrs,
1176 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1177 };
1178
1179 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1180 &iscsi_flashnode_conn_attr_group,
1181 NULL,
1182 };
1183
1184 static void iscsi_flashnode_conn_release(struct device *dev)
1185 {
1186 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1187
1188 kfree(fnode_conn->ipaddress);
1189 kfree(fnode_conn->redirect_ipaddr);
1190 kfree(fnode_conn->link_local_ipv6_addr);
1191 kfree(fnode_conn);
1192 }
1193
1194 static const struct device_type iscsi_flashnode_conn_dev_type = {
1195 .name = "iscsi_flashnode_conn_dev_type",
1196 .groups = iscsi_flashnode_conn_attr_groups,
1197 .release = iscsi_flashnode_conn_release,
1198 };
1199
1200 static struct bus_type iscsi_flashnode_bus;
1201
1202 int iscsi_flashnode_bus_match(struct device *dev,
1203 struct device_driver *drv)
1204 {
1205 if (dev->bus == &iscsi_flashnode_bus)
1206 return 1;
1207 return 0;
1208 }
1209 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1210
1211 static struct bus_type iscsi_flashnode_bus = {
1212 .name = "iscsi_flashnode",
1213 .match = &iscsi_flashnode_bus_match,
1214 };
1215
1216 /**
1217 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1218 * @shost: pointer to host data
1219 * @index: index of flashnode to add in sysfs
1220 * @transport: pointer to transport data
1221 * @dd_size: total size to allocate
1222 *
1223 * Adds a sysfs entry for the flashnode session attributes
1224 *
1225 * Returns:
1226 * pointer to allocated flashnode sess on success
1227 * %NULL on failure
1228 */
1229 struct iscsi_bus_flash_session *
1230 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1231 struct iscsi_transport *transport,
1232 int dd_size)
1233 {
1234 struct iscsi_bus_flash_session *fnode_sess;
1235 int err;
1236
1237 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1238 if (!fnode_sess)
1239 return NULL;
1240
1241 fnode_sess->transport = transport;
1242 fnode_sess->target_id = index;
1243 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1244 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1245 fnode_sess->dev.parent = &shost->shost_gendev;
1246 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1247 shost->host_no, index);
1248
1249 err = device_register(&fnode_sess->dev);
1250 if (err)
1251 goto free_fnode_sess;
1252
1253 if (dd_size)
1254 fnode_sess->dd_data = &fnode_sess[1];
1255
1256 return fnode_sess;
1257
1258 free_fnode_sess:
1259 kfree(fnode_sess);
1260 return NULL;
1261 }
1262 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1263
1264 /**
1265 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1266 * @shost: pointer to host data
1267 * @fnode_sess: pointer to the parent flashnode session entry
1268 * @transport: pointer to transport data
1269 * @dd_size: total size to allocate
1270 *
1271 * Adds a sysfs entry for the flashnode connection attributes
1272 *
1273 * Returns:
1274 * pointer to allocated flashnode conn on success
1275 * %NULL on failure
1276 */
1277 struct iscsi_bus_flash_conn *
1278 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1279 struct iscsi_bus_flash_session *fnode_sess,
1280 struct iscsi_transport *transport,
1281 int dd_size)
1282 {
1283 struct iscsi_bus_flash_conn *fnode_conn;
1284 int err;
1285
1286 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1287 if (!fnode_conn)
1288 return NULL;
1289
1290 fnode_conn->transport = transport;
1291 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1292 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1293 fnode_conn->dev.parent = &fnode_sess->dev;
1294 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1295 shost->host_no, fnode_sess->target_id);
1296
1297 err = device_register(&fnode_conn->dev);
1298 if (err)
1299 goto free_fnode_conn;
1300
1301 if (dd_size)
1302 fnode_conn->dd_data = &fnode_conn[1];
1303
1304 return fnode_conn;
1305
1306 free_fnode_conn:
1307 kfree(fnode_conn);
1308 return NULL;
1309 }
1310 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1311
1312 /**
1313 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1314 * @dev: device to verify
1315 * @data: pointer to data containing value to use for verification
1316 *
1317 * Verifies if the passed device is flashnode conn device
1318 *
1319 * Returns:
1320 * 1 on success
1321 * 0 on failure
1322 */
1323 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1324 {
1325 return dev->bus == &iscsi_flashnode_bus;
1326 }
1327
1328 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1329 {
1330 device_unregister(&fnode_conn->dev);
1331 return 0;
1332 }
1333
1334 static int flashnode_match_index(struct device *dev, void *data)
1335 {
1336 struct iscsi_bus_flash_session *fnode_sess = NULL;
1337 int ret = 0;
1338
1339 if (!iscsi_flashnode_bus_match(dev, NULL))
1340 goto exit_match_index;
1341
1342 fnode_sess = iscsi_dev_to_flash_session(dev);
1343 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1344
1345 exit_match_index:
1346 return ret;
1347 }
1348
1349 /**
1350 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1351 * @shost: pointer to host data
1352 * @idx: index to match
1353 *
1354 * Finds the flashnode session object for the passed index
1355 *
1356 * Returns:
1357 * pointer to found flashnode session object on success
1358 * %NULL on failure
1359 */
1360 static struct iscsi_bus_flash_session *
1361 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1362 {
1363 struct iscsi_bus_flash_session *fnode_sess = NULL;
1364 struct device *dev;
1365
1366 dev = device_find_child(&shost->shost_gendev, &idx,
1367 flashnode_match_index);
1368 if (dev)
1369 fnode_sess = iscsi_dev_to_flash_session(dev);
1370
1371 return fnode_sess;
1372 }
1373
1374 /**
1375 * iscsi_find_flashnode_sess - finds flashnode session entry
1376 * @shost: pointer to host data
1377 * @data: pointer to data containing value to use for comparison
1378 * @fn: function pointer that does actual comparison
1379 *
1380 * Finds the flashnode session object comparing the data passed using logic
1381 * defined in passed function pointer
1382 *
1383 * Returns:
1384 * pointer to found flashnode session device object on success
1385 * %NULL on failure
1386 */
1387 struct device *
1388 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1389 int (*fn)(struct device *dev, void *data))
1390 {
1391 return device_find_child(&shost->shost_gendev, data, fn);
1392 }
1393 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1394
1395 /**
1396 * iscsi_find_flashnode_conn - finds flashnode connection entry
1397 * @fnode_sess: pointer to parent flashnode session entry
1398 *
1399 * Finds the flashnode connection object comparing the data passed using logic
1400 * defined in passed function pointer
1401 *
1402 * Returns:
1403 * pointer to found flashnode connection device object on success
1404 * %NULL on failure
1405 */
1406 struct device *
1407 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1408 {
1409 return device_find_child(&fnode_sess->dev, NULL,
1410 iscsi_is_flashnode_conn_dev);
1411 }
1412 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1413
1414 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1415 {
1416 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1417 return 0;
1418
1419 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1420 }
1421
1422 /**
1423 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1424 * @fnode_sess: pointer to flashnode session entry to be destroyed
1425 *
1426 * Deletes the flashnode session entry and all children flashnode connection
1427 * entries from sysfs
1428 */
1429 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1430 {
1431 int err;
1432
1433 err = device_for_each_child(&fnode_sess->dev, NULL,
1434 iscsi_iter_destroy_flashnode_conn_fn);
1435 if (err)
1436 pr_err("Could not delete all connections for %s. Error %d.\n",
1437 fnode_sess->dev.kobj.name, err);
1438
1439 device_unregister(&fnode_sess->dev);
1440 }
1441 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1442
1443 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1444 {
1445 if (!iscsi_flashnode_bus_match(dev, NULL))
1446 return 0;
1447
1448 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1449 return 0;
1450 }
1451
1452 /**
1453 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1454 * @shost: pointer to host data
1455 *
1456 * Destroys all the flashnode session entries and all corresponding children
1457 * flashnode connection entries from sysfs
1458 */
1459 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1460 {
1461 device_for_each_child(&shost->shost_gendev, NULL,
1462 iscsi_iter_destroy_flashnode_fn);
1463 }
1464 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1465
1466 /*
1467 * BSG support
1468 */
1469 /**
1470 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1471 * @job: bsg job to be processed
1472 */
1473 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1474 {
1475 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1476 struct iscsi_bsg_request *req = job->request;
1477 struct iscsi_bsg_reply *reply = job->reply;
1478 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1479 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1480 int ret;
1481
1482 /* check if we have the msgcode value at least */
1483 if (job->request_len < sizeof(uint32_t)) {
1484 ret = -ENOMSG;
1485 goto fail_host_msg;
1486 }
1487
1488 /* Validate the host command */
1489 switch (req->msgcode) {
1490 case ISCSI_BSG_HST_VENDOR:
1491 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1492 if ((shost->hostt->vendor_id == 0L) ||
1493 (req->rqst_data.h_vendor.vendor_id !=
1494 shost->hostt->vendor_id)) {
1495 ret = -ESRCH;
1496 goto fail_host_msg;
1497 }
1498 break;
1499 default:
1500 ret = -EBADR;
1501 goto fail_host_msg;
1502 }
1503
1504 /* check if we really have all the request data needed */
1505 if (job->request_len < cmdlen) {
1506 ret = -ENOMSG;
1507 goto fail_host_msg;
1508 }
1509
1510 ret = i->iscsi_transport->bsg_request(job);
1511 if (!ret)
1512 return 0;
1513
1514 fail_host_msg:
1515 /* return the errno failure code as the only status */
1516 BUG_ON(job->reply_len < sizeof(uint32_t));
1517 reply->reply_payload_rcv_len = 0;
1518 reply->result = ret;
1519 job->reply_len = sizeof(uint32_t);
1520 bsg_job_done(job, ret, 0);
1521 return 0;
1522 }
1523
1524 /**
1525 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1526 * @shost: shost for iscsi_host
1527 * @ihost: iscsi_cls_host adding the structures to
1528 */
1529 static int
1530 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1531 {
1532 struct device *dev = &shost->shost_gendev;
1533 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1534 struct request_queue *q;
1535 char bsg_name[20];
1536
1537 if (!i->iscsi_transport->bsg_request)
1538 return -ENOTSUPP;
1539
1540 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1541 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1542 if (IS_ERR(q)) {
1543 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1544 "initialize - no request queue\n");
1545 return PTR_ERR(q);
1546 }
1547 __scsi_init_queue(shost, q);
1548
1549 ihost->bsg_q = q;
1550 return 0;
1551 }
1552
1553 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1554 struct device *cdev)
1555 {
1556 struct Scsi_Host *shost = dev_to_shost(dev);
1557 struct iscsi_cls_host *ihost = shost->shost_data;
1558
1559 memset(ihost, 0, sizeof(*ihost));
1560 atomic_set(&ihost->nr_scans, 0);
1561 mutex_init(&ihost->mutex);
1562
1563 iscsi_bsg_host_add(shost, ihost);
1564 /* ignore any bsg add error - we just can't do sgio */
1565
1566 return 0;
1567 }
1568
1569 static int iscsi_remove_host(struct transport_container *tc,
1570 struct device *dev, struct device *cdev)
1571 {
1572 struct Scsi_Host *shost = dev_to_shost(dev);
1573 struct iscsi_cls_host *ihost = shost->shost_data;
1574
1575 bsg_remove_queue(ihost->bsg_q);
1576 return 0;
1577 }
1578
1579 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1580 "iscsi_host",
1581 iscsi_setup_host,
1582 iscsi_remove_host,
1583 NULL);
1584
1585 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1586 "iscsi_session",
1587 NULL,
1588 NULL,
1589 NULL);
1590
1591 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1592 "iscsi_connection",
1593 NULL,
1594 NULL,
1595 NULL);
1596
1597 static struct sock *nls;
1598 static DEFINE_MUTEX(rx_queue_mutex);
1599
1600 static LIST_HEAD(sesslist);
1601 static DEFINE_SPINLOCK(sesslock);
1602 static LIST_HEAD(connlist);
1603 static LIST_HEAD(connlist_err);
1604 static DEFINE_SPINLOCK(connlock);
1605
1606 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1607 {
1608 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1609 return sess->sid;
1610 }
1611
1612 /*
1613 * Returns the matching session to a given sid
1614 */
1615 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1616 {
1617 unsigned long flags;
1618 struct iscsi_cls_session *sess;
1619
1620 spin_lock_irqsave(&sesslock, flags);
1621 list_for_each_entry(sess, &sesslist, sess_list) {
1622 if (sess->sid == sid) {
1623 spin_unlock_irqrestore(&sesslock, flags);
1624 return sess;
1625 }
1626 }
1627 spin_unlock_irqrestore(&sesslock, flags);
1628 return NULL;
1629 }
1630
1631 /*
1632 * Returns the matching connection to a given sid / cid tuple
1633 */
1634 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1635 {
1636 unsigned long flags;
1637 struct iscsi_cls_conn *conn;
1638
1639 spin_lock_irqsave(&connlock, flags);
1640 list_for_each_entry(conn, &connlist, conn_list) {
1641 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1642 spin_unlock_irqrestore(&connlock, flags);
1643 return conn;
1644 }
1645 }
1646 spin_unlock_irqrestore(&connlock, flags);
1647 return NULL;
1648 }
1649
1650 /*
1651 * The following functions can be used by LLDs that allocate
1652 * their own scsi_hosts or by software iscsi LLDs
1653 */
1654 static struct {
1655 int value;
1656 char *name;
1657 } iscsi_session_state_names[] = {
1658 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1659 { ISCSI_SESSION_FAILED, "FAILED" },
1660 { ISCSI_SESSION_FREE, "FREE" },
1661 };
1662
1663 static const char *iscsi_session_state_name(int state)
1664 {
1665 int i;
1666 char *name = NULL;
1667
1668 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1669 if (iscsi_session_state_names[i].value == state) {
1670 name = iscsi_session_state_names[i].name;
1671 break;
1672 }
1673 }
1674 return name;
1675 }
1676
1677 int iscsi_session_chkready(struct iscsi_cls_session *session)
1678 {
1679 int err;
1680
1681 switch (session->state) {
1682 case ISCSI_SESSION_LOGGED_IN:
1683 err = 0;
1684 break;
1685 case ISCSI_SESSION_FAILED:
1686 err = DID_IMM_RETRY << 16;
1687 break;
1688 case ISCSI_SESSION_FREE:
1689 err = DID_TRANSPORT_FAILFAST << 16;
1690 break;
1691 default:
1692 err = DID_NO_CONNECT << 16;
1693 break;
1694 }
1695 return err;
1696 }
1697 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1698
1699 int iscsi_is_session_online(struct iscsi_cls_session *session)
1700 {
1701 unsigned long flags;
1702 int ret = 0;
1703
1704 spin_lock_irqsave(&session->lock, flags);
1705 if (session->state == ISCSI_SESSION_LOGGED_IN)
1706 ret = 1;
1707 spin_unlock_irqrestore(&session->lock, flags);
1708 return ret;
1709 }
1710 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1711
1712 static void iscsi_session_release(struct device *dev)
1713 {
1714 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1715 struct Scsi_Host *shost;
1716
1717 shost = iscsi_session_to_shost(session);
1718 scsi_host_put(shost);
1719 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1720 kfree(session);
1721 }
1722
1723 int iscsi_is_session_dev(const struct device *dev)
1724 {
1725 return dev->release == iscsi_session_release;
1726 }
1727 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1728
1729 static int iscsi_iter_session_fn(struct device *dev, void *data)
1730 {
1731 void (* fn) (struct iscsi_cls_session *) = data;
1732
1733 if (!iscsi_is_session_dev(dev))
1734 return 0;
1735 fn(iscsi_dev_to_session(dev));
1736 return 0;
1737 }
1738
1739 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1740 void (*fn)(struct iscsi_cls_session *))
1741 {
1742 device_for_each_child(&shost->shost_gendev, fn,
1743 iscsi_iter_session_fn);
1744 }
1745 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1746
1747 /**
1748 * iscsi_scan_finished - helper to report when running scans are done
1749 * @shost: scsi host
1750 * @time: scan run time
1751 *
1752 * This function can be used by drives like qla4xxx to report to the scsi
1753 * layer when the scans it kicked off at module load time are done.
1754 */
1755 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1756 {
1757 struct iscsi_cls_host *ihost = shost->shost_data;
1758 /*
1759 * qla4xxx will have kicked off some session unblocks before calling
1760 * scsi_scan_host, so just wait for them to complete.
1761 */
1762 return !atomic_read(&ihost->nr_scans);
1763 }
1764 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1765
1766 struct iscsi_scan_data {
1767 unsigned int channel;
1768 unsigned int id;
1769 u64 lun;
1770 enum scsi_scan_mode rescan;
1771 };
1772
1773 static int iscsi_user_scan_session(struct device *dev, void *data)
1774 {
1775 struct iscsi_scan_data *scan_data = data;
1776 struct iscsi_cls_session *session;
1777 struct Scsi_Host *shost;
1778 struct iscsi_cls_host *ihost;
1779 unsigned long flags;
1780 unsigned int id;
1781
1782 if (!iscsi_is_session_dev(dev))
1783 return 0;
1784
1785 session = iscsi_dev_to_session(dev);
1786
1787 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1788
1789 shost = iscsi_session_to_shost(session);
1790 ihost = shost->shost_data;
1791
1792 mutex_lock(&ihost->mutex);
1793 spin_lock_irqsave(&session->lock, flags);
1794 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1795 spin_unlock_irqrestore(&session->lock, flags);
1796 goto user_scan_exit;
1797 }
1798 id = session->target_id;
1799 spin_unlock_irqrestore(&session->lock, flags);
1800
1801 if (id != ISCSI_MAX_TARGET) {
1802 if ((scan_data->channel == SCAN_WILD_CARD ||
1803 scan_data->channel == 0) &&
1804 (scan_data->id == SCAN_WILD_CARD ||
1805 scan_data->id == id))
1806 scsi_scan_target(&session->dev, 0, id,
1807 scan_data->lun, scan_data->rescan);
1808 }
1809
1810 user_scan_exit:
1811 mutex_unlock(&ihost->mutex);
1812 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1813 return 0;
1814 }
1815
1816 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1817 uint id, u64 lun)
1818 {
1819 struct iscsi_scan_data scan_data;
1820
1821 scan_data.channel = channel;
1822 scan_data.id = id;
1823 scan_data.lun = lun;
1824 scan_data.rescan = SCSI_SCAN_MANUAL;
1825
1826 return device_for_each_child(&shost->shost_gendev, &scan_data,
1827 iscsi_user_scan_session);
1828 }
1829
1830 static void iscsi_scan_session(struct work_struct *work)
1831 {
1832 struct iscsi_cls_session *session =
1833 container_of(work, struct iscsi_cls_session, scan_work);
1834 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1835 struct iscsi_cls_host *ihost = shost->shost_data;
1836 struct iscsi_scan_data scan_data;
1837
1838 scan_data.channel = 0;
1839 scan_data.id = SCAN_WILD_CARD;
1840 scan_data.lun = SCAN_WILD_CARD;
1841 scan_data.rescan = SCSI_SCAN_RESCAN;
1842
1843 iscsi_user_scan_session(&session->dev, &scan_data);
1844 atomic_dec(&ihost->nr_scans);
1845 }
1846
1847 /**
1848 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1849 * @cmd: scsi cmd passed to scsi eh handler
1850 *
1851 * If the session is down this function will wait for the recovery
1852 * timer to fire or for the session to be logged back in. If the
1853 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1854 * should pass this error value to the scsi eh.
1855 */
1856 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1857 {
1858 struct iscsi_cls_session *session =
1859 starget_to_session(scsi_target(cmd->device));
1860 unsigned long flags;
1861 int ret = 0;
1862
1863 spin_lock_irqsave(&session->lock, flags);
1864 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1865 if (session->state == ISCSI_SESSION_FREE) {
1866 ret = FAST_IO_FAIL;
1867 break;
1868 }
1869 spin_unlock_irqrestore(&session->lock, flags);
1870 msleep(1000);
1871 spin_lock_irqsave(&session->lock, flags);
1872 }
1873 spin_unlock_irqrestore(&session->lock, flags);
1874 return ret;
1875 }
1876 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1877
1878 static void session_recovery_timedout(struct work_struct *work)
1879 {
1880 struct iscsi_cls_session *session =
1881 container_of(work, struct iscsi_cls_session,
1882 recovery_work.work);
1883 unsigned long flags;
1884
1885 iscsi_cls_session_printk(KERN_INFO, session,
1886 "session recovery timed out after %d secs\n",
1887 session->recovery_tmo);
1888
1889 spin_lock_irqsave(&session->lock, flags);
1890 switch (session->state) {
1891 case ISCSI_SESSION_FAILED:
1892 session->state = ISCSI_SESSION_FREE;
1893 break;
1894 case ISCSI_SESSION_LOGGED_IN:
1895 case ISCSI_SESSION_FREE:
1896 /* we raced with the unblock's flush */
1897 spin_unlock_irqrestore(&session->lock, flags);
1898 return;
1899 }
1900 spin_unlock_irqrestore(&session->lock, flags);
1901
1902 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1903 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1904 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1905
1906 if (session->transport->session_recovery_timedout)
1907 session->transport->session_recovery_timedout(session);
1908 }
1909
1910 static void __iscsi_unblock_session(struct work_struct *work)
1911 {
1912 struct iscsi_cls_session *session =
1913 container_of(work, struct iscsi_cls_session,
1914 unblock_work);
1915 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1916 struct iscsi_cls_host *ihost = shost->shost_data;
1917 unsigned long flags;
1918
1919 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1920 /*
1921 * The recovery and unblock work get run from the same workqueue,
1922 * so try to cancel it if it was going to run after this unblock.
1923 */
1924 cancel_delayed_work(&session->recovery_work);
1925 spin_lock_irqsave(&session->lock, flags);
1926 session->state = ISCSI_SESSION_LOGGED_IN;
1927 spin_unlock_irqrestore(&session->lock, flags);
1928 /* start IO */
1929 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1930 /*
1931 * Only do kernel scanning if the driver is properly hooked into
1932 * the async scanning code (drivers like iscsi_tcp do login and
1933 * scanning from userspace).
1934 */
1935 if (shost->hostt->scan_finished) {
1936 if (scsi_queue_work(shost, &session->scan_work))
1937 atomic_inc(&ihost->nr_scans);
1938 }
1939 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1940 }
1941
1942 /**
1943 * iscsi_unblock_session - set a session as logged in and start IO.
1944 * @session: iscsi session
1945 *
1946 * Mark a session as ready to accept IO.
1947 */
1948 void iscsi_unblock_session(struct iscsi_cls_session *session)
1949 {
1950 flush_work(&session->block_work);
1951
1952 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1953 /*
1954 * Blocking the session can be done from any context so we only
1955 * queue the block work. Make sure the unblock work has completed
1956 * because it flushes/cancels the other works and updates the state.
1957 */
1958 flush_work(&session->unblock_work);
1959 }
1960 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1961
1962 static void __iscsi_block_session(struct work_struct *work)
1963 {
1964 struct iscsi_cls_session *session =
1965 container_of(work, struct iscsi_cls_session,
1966 block_work);
1967 unsigned long flags;
1968
1969 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1970 spin_lock_irqsave(&session->lock, flags);
1971 session->state = ISCSI_SESSION_FAILED;
1972 spin_unlock_irqrestore(&session->lock, flags);
1973 scsi_target_block(&session->dev);
1974 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1975 if (session->recovery_tmo >= 0)
1976 queue_delayed_work(iscsi_eh_timer_workq,
1977 &session->recovery_work,
1978 session->recovery_tmo * HZ);
1979 }
1980
1981 void iscsi_block_session(struct iscsi_cls_session *session)
1982 {
1983 queue_work(iscsi_eh_timer_workq, &session->block_work);
1984 }
1985 EXPORT_SYMBOL_GPL(iscsi_block_session);
1986
1987 static void __iscsi_unbind_session(struct work_struct *work)
1988 {
1989 struct iscsi_cls_session *session =
1990 container_of(work, struct iscsi_cls_session,
1991 unbind_work);
1992 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1993 struct iscsi_cls_host *ihost = shost->shost_data;
1994 unsigned long flags;
1995 unsigned int target_id;
1996
1997 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
1998
1999 /* Prevent new scans and make sure scanning is not in progress */
2000 mutex_lock(&ihost->mutex);
2001 spin_lock_irqsave(&session->lock, flags);
2002 if (session->target_id == ISCSI_MAX_TARGET) {
2003 spin_unlock_irqrestore(&session->lock, flags);
2004 mutex_unlock(&ihost->mutex);
2005 goto unbind_session_exit;
2006 }
2007
2008 target_id = session->target_id;
2009 session->target_id = ISCSI_MAX_TARGET;
2010 spin_unlock_irqrestore(&session->lock, flags);
2011 mutex_unlock(&ihost->mutex);
2012
2013 scsi_remove_target(&session->dev);
2014
2015 if (session->ida_used)
2016 ida_simple_remove(&iscsi_sess_ida, target_id);
2017
2018 unbind_session_exit:
2019 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2020 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2021 }
2022
2023 static void __iscsi_destroy_session(struct work_struct *work)
2024 {
2025 struct iscsi_cls_session *session =
2026 container_of(work, struct iscsi_cls_session, destroy_work);
2027
2028 session->transport->destroy_session(session);
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 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2054 spin_lock_init(&session->lock);
2055
2056 /* this is released in the dev's release function */
2057 scsi_host_get(shost);
2058 session->dev.parent = &shost->shost_gendev;
2059 session->dev.release = iscsi_session_release;
2060 device_initialize(&session->dev);
2061 if (dd_size)
2062 session->dd_data = &session[1];
2063
2064 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2065 return session;
2066 }
2067 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2068
2069 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2070 {
2071 unsigned long flags;
2072 int id = 0;
2073 int err;
2074
2075 session->sid = atomic_add_return(1, &iscsi_session_nr);
2076
2077 if (target_id == ISCSI_MAX_TARGET) {
2078 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2079
2080 if (id < 0) {
2081 iscsi_cls_session_printk(KERN_ERR, session,
2082 "Failure in Target ID Allocation\n");
2083 return id;
2084 }
2085 session->target_id = (unsigned int)id;
2086 session->ida_used = true;
2087 } else
2088 session->target_id = target_id;
2089
2090 dev_set_name(&session->dev, "session%u", session->sid);
2091 err = device_add(&session->dev);
2092 if (err) {
2093 iscsi_cls_session_printk(KERN_ERR, session,
2094 "could not register session's dev\n");
2095 goto release_ida;
2096 }
2097 err = transport_register_device(&session->dev);
2098 if (err) {
2099 iscsi_cls_session_printk(KERN_ERR, session,
2100 "could not register transport's dev\n");
2101 goto release_dev;
2102 }
2103
2104 spin_lock_irqsave(&sesslock, flags);
2105 list_add(&session->sess_list, &sesslist);
2106 spin_unlock_irqrestore(&sesslock, flags);
2107
2108 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2109 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2110 return 0;
2111
2112 release_dev:
2113 device_del(&session->dev);
2114 release_ida:
2115 if (session->ida_used)
2116 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2117
2118 return err;
2119 }
2120 EXPORT_SYMBOL_GPL(iscsi_add_session);
2121
2122 /**
2123 * iscsi_create_session - create iscsi class session
2124 * @shost: scsi host
2125 * @transport: iscsi transport
2126 * @dd_size: private driver data size
2127 * @target_id: which target
2128 *
2129 * This can be called from a LLD or iscsi_transport.
2130 */
2131 struct iscsi_cls_session *
2132 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2133 int dd_size, unsigned int target_id)
2134 {
2135 struct iscsi_cls_session *session;
2136
2137 session = iscsi_alloc_session(shost, transport, dd_size);
2138 if (!session)
2139 return NULL;
2140
2141 if (iscsi_add_session(session, target_id)) {
2142 iscsi_free_session(session);
2143 return NULL;
2144 }
2145 return session;
2146 }
2147 EXPORT_SYMBOL_GPL(iscsi_create_session);
2148
2149 static void iscsi_conn_release(struct device *dev)
2150 {
2151 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2152 struct device *parent = conn->dev.parent;
2153
2154 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2155 kfree(conn);
2156 put_device(parent);
2157 }
2158
2159 static int iscsi_is_conn_dev(const struct device *dev)
2160 {
2161 return dev->release == iscsi_conn_release;
2162 }
2163
2164 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2165 {
2166 if (!iscsi_is_conn_dev(dev))
2167 return 0;
2168 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2169 }
2170
2171 void iscsi_remove_session(struct iscsi_cls_session *session)
2172 {
2173 unsigned long flags;
2174 int err;
2175
2176 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2177
2178 spin_lock_irqsave(&sesslock, flags);
2179 if (!list_empty(&session->sess_list))
2180 list_del(&session->sess_list);
2181 spin_unlock_irqrestore(&sesslock, flags);
2182
2183 flush_work(&session->block_work);
2184 flush_work(&session->unblock_work);
2185 cancel_delayed_work_sync(&session->recovery_work);
2186 /*
2187 * If we are blocked let commands flow again. The lld or iscsi
2188 * layer should set up the queuecommand to fail commands.
2189 * We assume that LLD will not be calling block/unblock while
2190 * removing the session.
2191 */
2192 spin_lock_irqsave(&session->lock, flags);
2193 session->state = ISCSI_SESSION_FREE;
2194 spin_unlock_irqrestore(&session->lock, flags);
2195
2196 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2197 /* flush running scans then delete devices */
2198 flush_work(&session->scan_work);
2199 /* flush running unbind operations */
2200 flush_work(&session->unbind_work);
2201 __iscsi_unbind_session(&session->unbind_work);
2202
2203 /* hw iscsi may not have removed all connections from session */
2204 err = device_for_each_child(&session->dev, NULL,
2205 iscsi_iter_destroy_conn_fn);
2206 if (err)
2207 iscsi_cls_session_printk(KERN_ERR, session,
2208 "Could not delete all connections "
2209 "for session. Error %d.\n", err);
2210
2211 transport_unregister_device(&session->dev);
2212
2213 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2214 device_del(&session->dev);
2215 }
2216 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2217
2218 static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag)
2219 {
2220 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n");
2221
2222 switch (flag) {
2223 case STOP_CONN_RECOVER:
2224 conn->state = ISCSI_CONN_FAILED;
2225 break;
2226 case STOP_CONN_TERM:
2227 conn->state = ISCSI_CONN_DOWN;
2228 break;
2229 default:
2230 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n",
2231 flag);
2232 return;
2233 }
2234
2235 conn->transport->stop_conn(conn, flag);
2236 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n");
2237 }
2238
2239 static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active)
2240 {
2241 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2242 struct iscsi_endpoint *ep;
2243
2244 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n");
2245 conn->state = ISCSI_CONN_FAILED;
2246
2247 if (!conn->ep || !session->transport->ep_disconnect)
2248 return;
2249
2250 ep = conn->ep;
2251 conn->ep = NULL;
2252
2253 session->transport->unbind_conn(conn, is_active);
2254 session->transport->ep_disconnect(ep);
2255 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n");
2256 }
2257
2258 static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn,
2259 struct iscsi_endpoint *ep,
2260 bool is_active)
2261 {
2262 /* Check if this was a conn error and the kernel took ownership */
2263 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
2264 iscsi_ep_disconnect(conn, is_active);
2265 } else {
2266 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n");
2267 mutex_unlock(&conn->ep_mutex);
2268
2269 flush_work(&conn->cleanup_work);
2270 /*
2271 * Userspace is now done with the EP so we can release the ref
2272 * iscsi_cleanup_conn_work_fn took.
2273 */
2274 iscsi_put_endpoint(ep);
2275 mutex_lock(&conn->ep_mutex);
2276 }
2277 }
2278
2279 static int iscsi_if_stop_conn(struct iscsi_transport *transport,
2280 struct iscsi_uevent *ev)
2281 {
2282 int flag = ev->u.stop_conn.flag;
2283 struct iscsi_cls_conn *conn;
2284
2285 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
2286 if (!conn)
2287 return -EINVAL;
2288
2289 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n");
2290 /*
2291 * If this is a termination we have to call stop_conn with that flag
2292 * so the correct states get set. If we haven't run the work yet try to
2293 * avoid the extra run.
2294 */
2295 if (flag == STOP_CONN_TERM) {
2296 cancel_work_sync(&conn->cleanup_work);
2297 iscsi_stop_conn(conn, flag);
2298 } else {
2299 /*
2300 * For offload, when iscsid is restarted it won't know about
2301 * existing endpoints so it can't do a ep_disconnect. We clean
2302 * it up here for userspace.
2303 */
2304 mutex_lock(&conn->ep_mutex);
2305 if (conn->ep)
2306 iscsi_if_disconnect_bound_ep(conn, conn->ep, true);
2307 mutex_unlock(&conn->ep_mutex);
2308
2309 /*
2310 * Figure out if it was the kernel or userspace initiating this.
2311 */
2312 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
2313 iscsi_stop_conn(conn, flag);
2314 } else {
2315 ISCSI_DBG_TRANS_CONN(conn,
2316 "flush kernel conn cleanup.\n");
2317 flush_work(&conn->cleanup_work);
2318 }
2319 /*
2320 * Only clear for recovery to avoid extra cleanup runs during
2321 * termination.
2322 */
2323 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags);
2324 }
2325 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n");
2326 return 0;
2327 }
2328
2329 static void iscsi_cleanup_conn_work_fn(struct work_struct *work)
2330 {
2331 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn,
2332 cleanup_work);
2333 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2334
2335 mutex_lock(&conn->ep_mutex);
2336 /*
2337 * If we are not at least bound there is nothing for us to do. Userspace
2338 * will do a ep_disconnect call if offload is used, but will not be
2339 * doing a stop since there is nothing to clean up, so we have to clear
2340 * the cleanup bit here.
2341 */
2342 if (conn->state != ISCSI_CONN_BOUND && conn->state != ISCSI_CONN_UP) {
2343 ISCSI_DBG_TRANS_CONN(conn, "Got error while conn is already failed. Ignoring.\n");
2344 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags);
2345 mutex_unlock(&conn->ep_mutex);
2346 return;
2347 }
2348
2349 /*
2350 * Get a ref to the ep, so we don't release its ID until after
2351 * userspace is done referencing it in iscsi_if_disconnect_bound_ep.
2352 */
2353 if (conn->ep)
2354 get_device(&conn->ep->dev);
2355 iscsi_ep_disconnect(conn, false);
2356
2357 if (system_state != SYSTEM_RUNNING) {
2358 /*
2359 * If the user has set up for the session to never timeout
2360 * then hang like they wanted. For all other cases fail right
2361 * away since userspace is not going to relogin.
2362 */
2363 if (session->recovery_tmo > 0)
2364 session->recovery_tmo = 0;
2365 }
2366
2367 iscsi_stop_conn(conn, STOP_CONN_RECOVER);
2368 mutex_unlock(&conn->ep_mutex);
2369 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n");
2370 }
2371
2372 void iscsi_free_session(struct iscsi_cls_session *session)
2373 {
2374 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2375 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2376 put_device(&session->dev);
2377 }
2378 EXPORT_SYMBOL_GPL(iscsi_free_session);
2379
2380 /**
2381 * iscsi_create_conn - create iscsi class connection
2382 * @session: iscsi cls session
2383 * @dd_size: private driver data size
2384 * @cid: connection id
2385 *
2386 * This can be called from a LLD or iscsi_transport. The connection
2387 * is child of the session so cid must be unique for all connections
2388 * on the session.
2389 *
2390 * Since we do not support MCS, cid will normally be zero. In some cases
2391 * for software iscsi we could be trying to preallocate a connection struct
2392 * in which case there could be two connection structs and cid would be
2393 * non-zero.
2394 */
2395 struct iscsi_cls_conn *
2396 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2397 {
2398 struct iscsi_transport *transport = session->transport;
2399 struct iscsi_cls_conn *conn;
2400 unsigned long flags;
2401 int err;
2402
2403 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2404 if (!conn)
2405 return NULL;
2406 if (dd_size)
2407 conn->dd_data = &conn[1];
2408
2409 mutex_init(&conn->ep_mutex);
2410 INIT_LIST_HEAD(&conn->conn_list);
2411 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn);
2412 conn->transport = transport;
2413 conn->cid = cid;
2414 conn->state = ISCSI_CONN_DOWN;
2415
2416 /* this is released in the dev's release function */
2417 if (!get_device(&session->dev))
2418 goto free_conn;
2419
2420 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2421 conn->dev.parent = &session->dev;
2422 conn->dev.release = iscsi_conn_release;
2423 err = device_register(&conn->dev);
2424 if (err) {
2425 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2426 "register connection's dev\n");
2427 goto release_parent_ref;
2428 }
2429 err = transport_register_device(&conn->dev);
2430 if (err) {
2431 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2432 "register transport's dev\n");
2433 goto release_conn_ref;
2434 }
2435
2436 spin_lock_irqsave(&connlock, flags);
2437 list_add(&conn->conn_list, &connlist);
2438 spin_unlock_irqrestore(&connlock, flags);
2439
2440 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2441 return conn;
2442
2443 release_conn_ref:
2444 device_unregister(&conn->dev);
2445 put_device(&session->dev);
2446 return NULL;
2447 release_parent_ref:
2448 put_device(&session->dev);
2449 free_conn:
2450 kfree(conn);
2451 return NULL;
2452 }
2453
2454 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2455
2456 /**
2457 * iscsi_destroy_conn - destroy iscsi class connection
2458 * @conn: iscsi cls session
2459 *
2460 * This can be called from a LLD or iscsi_transport.
2461 */
2462 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2463 {
2464 unsigned long flags;
2465
2466 spin_lock_irqsave(&connlock, flags);
2467 list_del(&conn->conn_list);
2468 spin_unlock_irqrestore(&connlock, flags);
2469
2470 transport_unregister_device(&conn->dev);
2471 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2472 device_unregister(&conn->dev);
2473 return 0;
2474 }
2475 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2476
2477 void iscsi_put_conn(struct iscsi_cls_conn *conn)
2478 {
2479 put_device(&conn->dev);
2480 }
2481 EXPORT_SYMBOL_GPL(iscsi_put_conn);
2482
2483 void iscsi_get_conn(struct iscsi_cls_conn *conn)
2484 {
2485 get_device(&conn->dev);
2486 }
2487 EXPORT_SYMBOL_GPL(iscsi_get_conn);
2488
2489 /*
2490 * iscsi interface functions
2491 */
2492 static struct iscsi_internal *
2493 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2494 {
2495 struct iscsi_internal *priv;
2496 unsigned long flags;
2497
2498 spin_lock_irqsave(&iscsi_transport_lock, flags);
2499 list_for_each_entry(priv, &iscsi_transports, list) {
2500 if (tt == priv->iscsi_transport) {
2501 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2502 return priv;
2503 }
2504 }
2505 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2506 return NULL;
2507 }
2508
2509 static int
2510 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2511 {
2512 return nlmsg_multicast(nls, skb, 0, group, gfp);
2513 }
2514
2515 static int
2516 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2517 {
2518 return nlmsg_unicast(nls, skb, portid);
2519 }
2520
2521 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2522 char *data, uint32_t data_size)
2523 {
2524 struct nlmsghdr *nlh;
2525 struct sk_buff *skb;
2526 struct iscsi_uevent *ev;
2527 char *pdu;
2528 struct iscsi_internal *priv;
2529 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2530 data_size);
2531
2532 priv = iscsi_if_transport_lookup(conn->transport);
2533 if (!priv)
2534 return -EINVAL;
2535
2536 skb = alloc_skb(len, GFP_ATOMIC);
2537 if (!skb) {
2538 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2539 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2540 "control PDU: OOM\n");
2541 return -ENOMEM;
2542 }
2543
2544 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2545 ev = nlmsg_data(nlh);
2546 memset(ev, 0, sizeof(*ev));
2547 ev->transport_handle = iscsi_handle(conn->transport);
2548 ev->type = ISCSI_KEVENT_RECV_PDU;
2549 ev->r.recv_req.cid = conn->cid;
2550 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2551 pdu = (char*)ev + sizeof(*ev);
2552 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2553 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2554
2555 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2556 }
2557 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2558
2559 int iscsi_offload_mesg(struct Scsi_Host *shost,
2560 struct iscsi_transport *transport, uint32_t type,
2561 char *data, uint16_t data_size)
2562 {
2563 struct nlmsghdr *nlh;
2564 struct sk_buff *skb;
2565 struct iscsi_uevent *ev;
2566 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2567
2568 skb = alloc_skb(len, GFP_ATOMIC);
2569 if (!skb) {
2570 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2571 return -ENOMEM;
2572 }
2573
2574 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2575 ev = nlmsg_data(nlh);
2576 memset(ev, 0, sizeof(*ev));
2577 ev->type = type;
2578 ev->transport_handle = iscsi_handle(transport);
2579 switch (type) {
2580 case ISCSI_KEVENT_PATH_REQ:
2581 ev->r.req_path.host_no = shost->host_no;
2582 break;
2583 case ISCSI_KEVENT_IF_DOWN:
2584 ev->r.notify_if_down.host_no = shost->host_no;
2585 break;
2586 }
2587
2588 memcpy((char *)ev + sizeof(*ev), data, data_size);
2589
2590 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2591 }
2592 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2593
2594 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2595 {
2596 struct nlmsghdr *nlh;
2597 struct sk_buff *skb;
2598 struct iscsi_uevent *ev;
2599 struct iscsi_internal *priv;
2600 int len = nlmsg_total_size(sizeof(*ev));
2601
2602 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags))
2603 queue_work(iscsi_conn_cleanup_workq, &conn->cleanup_work);
2604
2605 priv = iscsi_if_transport_lookup(conn->transport);
2606 if (!priv)
2607 return;
2608
2609 skb = alloc_skb(len, GFP_ATOMIC);
2610 if (!skb) {
2611 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2612 "conn error (%d)\n", error);
2613 return;
2614 }
2615
2616 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2617 ev = nlmsg_data(nlh);
2618 ev->transport_handle = iscsi_handle(conn->transport);
2619 ev->type = ISCSI_KEVENT_CONN_ERROR;
2620 ev->r.connerror.error = error;
2621 ev->r.connerror.cid = conn->cid;
2622 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2623
2624 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2625
2626 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2627 error);
2628 }
2629 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2630
2631 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2632 enum iscsi_conn_state state)
2633 {
2634 struct nlmsghdr *nlh;
2635 struct sk_buff *skb;
2636 struct iscsi_uevent *ev;
2637 struct iscsi_internal *priv;
2638 int len = nlmsg_total_size(sizeof(*ev));
2639
2640 priv = iscsi_if_transport_lookup(conn->transport);
2641 if (!priv)
2642 return;
2643
2644 skb = alloc_skb(len, GFP_ATOMIC);
2645 if (!skb) {
2646 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2647 "conn login (%d)\n", state);
2648 return;
2649 }
2650
2651 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2652 ev = nlmsg_data(nlh);
2653 ev->transport_handle = iscsi_handle(conn->transport);
2654 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2655 ev->r.conn_login.state = state;
2656 ev->r.conn_login.cid = conn->cid;
2657 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2658 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2659
2660 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2661 state);
2662 }
2663 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2664
2665 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2666 enum iscsi_host_event_code code, uint32_t data_size,
2667 uint8_t *data)
2668 {
2669 struct nlmsghdr *nlh;
2670 struct sk_buff *skb;
2671 struct iscsi_uevent *ev;
2672 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2673
2674 skb = alloc_skb(len, GFP_NOIO);
2675 if (!skb) {
2676 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2677 host_no, code);
2678 return;
2679 }
2680
2681 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2682 ev = nlmsg_data(nlh);
2683 ev->transport_handle = iscsi_handle(transport);
2684 ev->type = ISCSI_KEVENT_HOST_EVENT;
2685 ev->r.host_event.host_no = host_no;
2686 ev->r.host_event.code = code;
2687 ev->r.host_event.data_size = data_size;
2688
2689 if (data_size)
2690 memcpy((char *)ev + sizeof(*ev), data, data_size);
2691
2692 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2693 }
2694 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2695
2696 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2697 uint32_t status, uint32_t pid, uint32_t data_size,
2698 uint8_t *data)
2699 {
2700 struct nlmsghdr *nlh;
2701 struct sk_buff *skb;
2702 struct iscsi_uevent *ev;
2703 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2704
2705 skb = alloc_skb(len, GFP_NOIO);
2706 if (!skb) {
2707 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2708 return;
2709 }
2710
2711 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2712 ev = nlmsg_data(nlh);
2713 ev->transport_handle = iscsi_handle(transport);
2714 ev->type = ISCSI_KEVENT_PING_COMP;
2715 ev->r.ping_comp.host_no = host_no;
2716 ev->r.ping_comp.status = status;
2717 ev->r.ping_comp.pid = pid;
2718 ev->r.ping_comp.data_size = data_size;
2719 memcpy((char *)ev + sizeof(*ev), data, data_size);
2720
2721 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2722 }
2723 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2724
2725 static int
2726 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2727 {
2728 struct sk_buff *skb;
2729 struct nlmsghdr *nlh;
2730 int len = nlmsg_total_size(size);
2731
2732 skb = alloc_skb(len, GFP_ATOMIC);
2733 if (!skb) {
2734 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2735 return -ENOMEM;
2736 }
2737
2738 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2739 memcpy(nlmsg_data(nlh), payload, size);
2740 return iscsi_unicast_skb(skb, portid);
2741 }
2742
2743 static int
2744 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2745 {
2746 struct iscsi_uevent *ev = nlmsg_data(nlh);
2747 struct iscsi_stats *stats;
2748 struct sk_buff *skbstat;
2749 struct iscsi_cls_conn *conn;
2750 struct nlmsghdr *nlhstat;
2751 struct iscsi_uevent *evstat;
2752 struct iscsi_internal *priv;
2753 int len = nlmsg_total_size(sizeof(*ev) +
2754 sizeof(struct iscsi_stats) +
2755 sizeof(struct iscsi_stats_custom) *
2756 ISCSI_STATS_CUSTOM_MAX);
2757 int err = 0;
2758
2759 priv = iscsi_if_transport_lookup(transport);
2760 if (!priv)
2761 return -EINVAL;
2762
2763 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2764 if (!conn)
2765 return -EEXIST;
2766
2767 do {
2768 int actual_size;
2769
2770 skbstat = alloc_skb(len, GFP_ATOMIC);
2771 if (!skbstat) {
2772 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2773 "deliver stats: OOM\n");
2774 return -ENOMEM;
2775 }
2776
2777 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2778 (len - sizeof(*nlhstat)), 0);
2779 evstat = nlmsg_data(nlhstat);
2780 memset(evstat, 0, sizeof(*evstat));
2781 evstat->transport_handle = iscsi_handle(conn->transport);
2782 evstat->type = nlh->nlmsg_type;
2783 evstat->u.get_stats.cid =
2784 ev->u.get_stats.cid;
2785 evstat->u.get_stats.sid =
2786 ev->u.get_stats.sid;
2787 stats = (struct iscsi_stats *)
2788 ((char*)evstat + sizeof(*evstat));
2789 memset(stats, 0, sizeof(*stats));
2790
2791 transport->get_stats(conn, stats);
2792 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2793 sizeof(struct iscsi_stats) +
2794 sizeof(struct iscsi_stats_custom) *
2795 stats->custom_length);
2796 actual_size -= sizeof(*nlhstat);
2797 actual_size = nlmsg_msg_size(actual_size);
2798 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2799 nlhstat->nlmsg_len = actual_size;
2800
2801 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2802 GFP_ATOMIC);
2803 } while (err < 0 && err != -ECONNREFUSED);
2804
2805 return err;
2806 }
2807
2808 /**
2809 * iscsi_session_event - send session destr. completion event
2810 * @session: iscsi class session
2811 * @event: type of event
2812 */
2813 int iscsi_session_event(struct iscsi_cls_session *session,
2814 enum iscsi_uevent_e event)
2815 {
2816 struct iscsi_internal *priv;
2817 struct Scsi_Host *shost;
2818 struct iscsi_uevent *ev;
2819 struct sk_buff *skb;
2820 struct nlmsghdr *nlh;
2821 int rc, len = nlmsg_total_size(sizeof(*ev));
2822
2823 priv = iscsi_if_transport_lookup(session->transport);
2824 if (!priv)
2825 return -EINVAL;
2826 shost = iscsi_session_to_shost(session);
2827
2828 skb = alloc_skb(len, GFP_KERNEL);
2829 if (!skb) {
2830 iscsi_cls_session_printk(KERN_ERR, session,
2831 "Cannot notify userspace of session "
2832 "event %u\n", event);
2833 return -ENOMEM;
2834 }
2835
2836 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2837 ev = nlmsg_data(nlh);
2838 ev->transport_handle = iscsi_handle(session->transport);
2839
2840 ev->type = event;
2841 switch (event) {
2842 case ISCSI_KEVENT_DESTROY_SESSION:
2843 ev->r.d_session.host_no = shost->host_no;
2844 ev->r.d_session.sid = session->sid;
2845 break;
2846 case ISCSI_KEVENT_CREATE_SESSION:
2847 ev->r.c_session_ret.host_no = shost->host_no;
2848 ev->r.c_session_ret.sid = session->sid;
2849 break;
2850 case ISCSI_KEVENT_UNBIND_SESSION:
2851 ev->r.unbind_session.host_no = shost->host_no;
2852 ev->r.unbind_session.sid = session->sid;
2853 break;
2854 default:
2855 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2856 "%u.\n", event);
2857 kfree_skb(skb);
2858 return -EINVAL;
2859 }
2860
2861 /*
2862 * this will occur if the daemon is not up, so we just warn
2863 * the user and when the daemon is restarted it will handle it
2864 */
2865 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2866 if (rc == -ESRCH)
2867 iscsi_cls_session_printk(KERN_ERR, session,
2868 "Cannot notify userspace of session "
2869 "event %u. Check iscsi daemon\n",
2870 event);
2871
2872 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2873 event, rc);
2874 return rc;
2875 }
2876 EXPORT_SYMBOL_GPL(iscsi_session_event);
2877
2878 static int
2879 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2880 struct iscsi_uevent *ev, pid_t pid,
2881 uint32_t initial_cmdsn, uint16_t cmds_max,
2882 uint16_t queue_depth)
2883 {
2884 struct iscsi_transport *transport = priv->iscsi_transport;
2885 struct iscsi_cls_session *session;
2886 struct Scsi_Host *shost;
2887
2888 session = transport->create_session(ep, cmds_max, queue_depth,
2889 initial_cmdsn);
2890 if (!session)
2891 return -ENOMEM;
2892
2893 session->creator = pid;
2894 shost = iscsi_session_to_shost(session);
2895 ev->r.c_session_ret.host_no = shost->host_no;
2896 ev->r.c_session_ret.sid = session->sid;
2897 ISCSI_DBG_TRANS_SESSION(session,
2898 "Completed creating transport session\n");
2899 return 0;
2900 }
2901
2902 static int
2903 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2904 {
2905 struct iscsi_cls_conn *conn;
2906 struct iscsi_cls_session *session;
2907
2908 session = iscsi_session_lookup(ev->u.c_conn.sid);
2909 if (!session) {
2910 printk(KERN_ERR "iscsi: invalid session %d.\n",
2911 ev->u.c_conn.sid);
2912 return -EINVAL;
2913 }
2914
2915 conn = transport->create_conn(session, ev->u.c_conn.cid);
2916 if (!conn) {
2917 iscsi_cls_session_printk(KERN_ERR, session,
2918 "couldn't create a new connection.");
2919 return -ENOMEM;
2920 }
2921
2922 ev->r.c_conn_ret.sid = session->sid;
2923 ev->r.c_conn_ret.cid = conn->cid;
2924
2925 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2926 return 0;
2927 }
2928
2929 static int
2930 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2931 {
2932 struct iscsi_cls_conn *conn;
2933
2934 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2935 if (!conn)
2936 return -EINVAL;
2937
2938 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n");
2939 flush_work(&conn->cleanup_work);
2940 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2941
2942 if (transport->destroy_conn)
2943 transport->destroy_conn(conn);
2944 return 0;
2945 }
2946
2947 static int
2948 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2949 {
2950 char *data = (char*)ev + sizeof(*ev);
2951 struct iscsi_cls_conn *conn;
2952 struct iscsi_cls_session *session;
2953 int err = 0, value = 0;
2954
2955 if (ev->u.set_param.len > PAGE_SIZE)
2956 return -EINVAL;
2957
2958 session = iscsi_session_lookup(ev->u.set_param.sid);
2959 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2960 if (!conn || !session)
2961 return -EINVAL;
2962
2963 switch (ev->u.set_param.param) {
2964 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2965 sscanf(data, "%d", &value);
2966 if (!session->recovery_tmo_sysfs_override)
2967 session->recovery_tmo = value;
2968 break;
2969 default:
2970 if ((conn->state == ISCSI_CONN_BOUND) ||
2971 (conn->state == ISCSI_CONN_UP)) {
2972 err = transport->set_param(conn, ev->u.set_param.param,
2973 data, ev->u.set_param.len);
2974 } else {
2975 return -ENOTCONN;
2976 }
2977 }
2978
2979 return err;
2980 }
2981
2982 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2983 struct iscsi_uevent *ev, int msg_type)
2984 {
2985 struct iscsi_endpoint *ep;
2986 struct sockaddr *dst_addr;
2987 struct Scsi_Host *shost = NULL;
2988 int non_blocking, err = 0;
2989
2990 if (!transport->ep_connect)
2991 return -EINVAL;
2992
2993 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2994 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2995 if (!shost) {
2996 printk(KERN_ERR "ep connect failed. Could not find "
2997 "host no %u\n",
2998 ev->u.ep_connect_through_host.host_no);
2999 return -ENODEV;
3000 }
3001 non_blocking = ev->u.ep_connect_through_host.non_blocking;
3002 } else
3003 non_blocking = ev->u.ep_connect.non_blocking;
3004
3005 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3006 ep = transport->ep_connect(shost, dst_addr, non_blocking);
3007 if (IS_ERR(ep)) {
3008 err = PTR_ERR(ep);
3009 goto release_host;
3010 }
3011
3012 ev->r.ep_connect_ret.handle = ep->id;
3013 release_host:
3014 if (shost)
3015 scsi_host_put(shost);
3016 return err;
3017 }
3018
3019 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
3020 u64 ep_handle)
3021 {
3022 struct iscsi_cls_conn *conn;
3023 struct iscsi_endpoint *ep;
3024
3025 if (!transport->ep_disconnect)
3026 return -EINVAL;
3027
3028 ep = iscsi_lookup_endpoint(ep_handle);
3029 if (!ep)
3030 return -EINVAL;
3031
3032 conn = ep->conn;
3033 if (!conn) {
3034 /*
3035 * conn was not even bound yet, so we can't get iscsi conn
3036 * failures yet.
3037 */
3038 transport->ep_disconnect(ep);
3039 goto put_ep;
3040 }
3041
3042 mutex_lock(&conn->ep_mutex);
3043 iscsi_if_disconnect_bound_ep(conn, ep, false);
3044 mutex_unlock(&conn->ep_mutex);
3045 put_ep:
3046 iscsi_put_endpoint(ep);
3047 return 0;
3048 }
3049
3050 static int
3051 iscsi_if_transport_ep(struct iscsi_transport *transport,
3052 struct iscsi_uevent *ev, int msg_type)
3053 {
3054 struct iscsi_endpoint *ep;
3055 int rc = 0;
3056
3057 switch (msg_type) {
3058 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3059 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3060 rc = iscsi_if_ep_connect(transport, ev, msg_type);
3061 break;
3062 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3063 if (!transport->ep_poll)
3064 return -EINVAL;
3065
3066 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
3067 if (!ep)
3068 return -EINVAL;
3069
3070 ev->r.retcode = transport->ep_poll(ep,
3071 ev->u.ep_poll.timeout_ms);
3072 iscsi_put_endpoint(ep);
3073 break;
3074 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3075 rc = iscsi_if_ep_disconnect(transport,
3076 ev->u.ep_disconnect.ep_handle);
3077 break;
3078 }
3079 return rc;
3080 }
3081
3082 static int
3083 iscsi_tgt_dscvr(struct iscsi_transport *transport,
3084 struct iscsi_uevent *ev)
3085 {
3086 struct Scsi_Host *shost;
3087 struct sockaddr *dst_addr;
3088 int err;
3089
3090 if (!transport->tgt_dscvr)
3091 return -EINVAL;
3092
3093 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3094 if (!shost) {
3095 printk(KERN_ERR "target discovery could not find host no %u\n",
3096 ev->u.tgt_dscvr.host_no);
3097 return -ENODEV;
3098 }
3099
3100
3101 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3102 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3103 ev->u.tgt_dscvr.enable, dst_addr);
3104 scsi_host_put(shost);
3105 return err;
3106 }
3107
3108 static int
3109 iscsi_set_host_param(struct iscsi_transport *transport,
3110 struct iscsi_uevent *ev)
3111 {
3112 char *data = (char*)ev + sizeof(*ev);
3113 struct Scsi_Host *shost;
3114 int err;
3115
3116 if (!transport->set_host_param)
3117 return -ENOSYS;
3118
3119 if (ev->u.set_host_param.len > PAGE_SIZE)
3120 return -EINVAL;
3121
3122 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3123 if (!shost) {
3124 printk(KERN_ERR "set_host_param could not find host no %u\n",
3125 ev->u.set_host_param.host_no);
3126 return -ENODEV;
3127 }
3128
3129 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3130 data, ev->u.set_host_param.len);
3131 scsi_host_put(shost);
3132 return err;
3133 }
3134
3135 static int
3136 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3137 {
3138 struct Scsi_Host *shost;
3139 struct iscsi_path *params;
3140 int err;
3141
3142 if (!transport->set_path)
3143 return -ENOSYS;
3144
3145 shost = scsi_host_lookup(ev->u.set_path.host_no);
3146 if (!shost) {
3147 printk(KERN_ERR "set path could not find host no %u\n",
3148 ev->u.set_path.host_no);
3149 return -ENODEV;
3150 }
3151
3152 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3153 err = transport->set_path(shost, params);
3154
3155 scsi_host_put(shost);
3156 return err;
3157 }
3158
3159 static int iscsi_session_has_conns(int sid)
3160 {
3161 struct iscsi_cls_conn *conn;
3162 unsigned long flags;
3163 int found = 0;
3164
3165 spin_lock_irqsave(&connlock, flags);
3166 list_for_each_entry(conn, &connlist, conn_list) {
3167 if (iscsi_conn_get_sid(conn) == sid) {
3168 found = 1;
3169 break;
3170 }
3171 }
3172 spin_unlock_irqrestore(&connlock, flags);
3173
3174 return found;
3175 }
3176
3177 static int
3178 iscsi_set_iface_params(struct iscsi_transport *transport,
3179 struct iscsi_uevent *ev, uint32_t len)
3180 {
3181 char *data = (char *)ev + sizeof(*ev);
3182 struct Scsi_Host *shost;
3183 int err;
3184
3185 if (!transport->set_iface_param)
3186 return -ENOSYS;
3187
3188 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3189 if (!shost) {
3190 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3191 ev->u.set_iface_params.host_no);
3192 return -ENODEV;
3193 }
3194
3195 err = transport->set_iface_param(shost, data, len);
3196 scsi_host_put(shost);
3197 return err;
3198 }
3199
3200 static int
3201 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3202 {
3203 struct Scsi_Host *shost;
3204 struct sockaddr *dst_addr;
3205 int err;
3206
3207 if (!transport->send_ping)
3208 return -ENOSYS;
3209
3210 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3211 if (!shost) {
3212 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3213 ev->u.iscsi_ping.host_no);
3214 return -ENODEV;
3215 }
3216
3217 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3218 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3219 ev->u.iscsi_ping.iface_type,
3220 ev->u.iscsi_ping.payload_size,
3221 ev->u.iscsi_ping.pid,
3222 dst_addr);
3223 scsi_host_put(shost);
3224 return err;
3225 }
3226
3227 static int
3228 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3229 {
3230 struct iscsi_uevent *ev = nlmsg_data(nlh);
3231 struct Scsi_Host *shost = NULL;
3232 struct iscsi_chap_rec *chap_rec;
3233 struct iscsi_internal *priv;
3234 struct sk_buff *skbchap;
3235 struct nlmsghdr *nlhchap;
3236 struct iscsi_uevent *evchap;
3237 uint32_t chap_buf_size;
3238 int len, err = 0;
3239 char *buf;
3240
3241 if (!transport->get_chap)
3242 return -EINVAL;
3243
3244 priv = iscsi_if_transport_lookup(transport);
3245 if (!priv)
3246 return -EINVAL;
3247
3248 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3249 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3250
3251 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3252 if (!shost) {
3253 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3254 __func__, ev->u.get_chap.host_no);
3255 return -ENODEV;
3256 }
3257
3258 do {
3259 int actual_size;
3260
3261 skbchap = alloc_skb(len, GFP_KERNEL);
3262 if (!skbchap) {
3263 printk(KERN_ERR "can not deliver chap: OOM\n");
3264 err = -ENOMEM;
3265 goto exit_get_chap;
3266 }
3267
3268 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3269 (len - sizeof(*nlhchap)), 0);
3270 evchap = nlmsg_data(nlhchap);
3271 memset(evchap, 0, sizeof(*evchap));
3272 evchap->transport_handle = iscsi_handle(transport);
3273 evchap->type = nlh->nlmsg_type;
3274 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3275 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3276 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3277 buf = (char *)evchap + sizeof(*evchap);
3278 memset(buf, 0, chap_buf_size);
3279
3280 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3281 &evchap->u.get_chap.num_entries, buf);
3282
3283 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3284 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3285 nlhchap->nlmsg_len = actual_size;
3286
3287 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3288 GFP_KERNEL);
3289 } while (err < 0 && err != -ECONNREFUSED);
3290
3291 exit_get_chap:
3292 scsi_host_put(shost);
3293 return err;
3294 }
3295
3296 static int iscsi_set_chap(struct iscsi_transport *transport,
3297 struct iscsi_uevent *ev, uint32_t len)
3298 {
3299 char *data = (char *)ev + sizeof(*ev);
3300 struct Scsi_Host *shost;
3301 int err = 0;
3302
3303 if (!transport->set_chap)
3304 return -ENOSYS;
3305
3306 shost = scsi_host_lookup(ev->u.set_path.host_no);
3307 if (!shost) {
3308 pr_err("%s could not find host no %u\n",
3309 __func__, ev->u.set_path.host_no);
3310 return -ENODEV;
3311 }
3312
3313 err = transport->set_chap(shost, data, len);
3314 scsi_host_put(shost);
3315 return err;
3316 }
3317
3318 static int iscsi_delete_chap(struct iscsi_transport *transport,
3319 struct iscsi_uevent *ev)
3320 {
3321 struct Scsi_Host *shost;
3322 int err = 0;
3323
3324 if (!transport->delete_chap)
3325 return -ENOSYS;
3326
3327 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3328 if (!shost) {
3329 printk(KERN_ERR "%s could not find host no %u\n",
3330 __func__, ev->u.delete_chap.host_no);
3331 return -ENODEV;
3332 }
3333
3334 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3335 scsi_host_put(shost);
3336 return err;
3337 }
3338
3339 static const struct {
3340 enum iscsi_discovery_parent_type value;
3341 char *name;
3342 } iscsi_discovery_parent_names[] = {
3343 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3344 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3345 {ISCSI_DISC_PARENT_ISNS, "isns" },
3346 };
3347
3348 char *iscsi_get_discovery_parent_name(int parent_type)
3349 {
3350 int i;
3351 char *state = "Unknown!";
3352
3353 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3354 if (iscsi_discovery_parent_names[i].value & parent_type) {
3355 state = iscsi_discovery_parent_names[i].name;
3356 break;
3357 }
3358 }
3359 return state;
3360 }
3361 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3362
3363 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3364 struct iscsi_uevent *ev, uint32_t len)
3365 {
3366 char *data = (char *)ev + sizeof(*ev);
3367 struct Scsi_Host *shost;
3368 struct iscsi_bus_flash_session *fnode_sess;
3369 struct iscsi_bus_flash_conn *fnode_conn;
3370 struct device *dev;
3371 uint32_t idx;
3372 int err = 0;
3373
3374 if (!transport->set_flashnode_param) {
3375 err = -ENOSYS;
3376 goto exit_set_fnode;
3377 }
3378
3379 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3380 if (!shost) {
3381 pr_err("%s could not find host no %u\n",
3382 __func__, ev->u.set_flashnode.host_no);
3383 err = -ENODEV;
3384 goto exit_set_fnode;
3385 }
3386
3387 idx = ev->u.set_flashnode.flashnode_idx;
3388 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3389 if (!fnode_sess) {
3390 pr_err("%s could not find flashnode %u for host no %u\n",
3391 __func__, idx, ev->u.set_flashnode.host_no);
3392 err = -ENODEV;
3393 goto put_host;
3394 }
3395
3396 dev = iscsi_find_flashnode_conn(fnode_sess);
3397 if (!dev) {
3398 err = -ENODEV;
3399 goto put_sess;
3400 }
3401
3402 fnode_conn = iscsi_dev_to_flash_conn(dev);
3403 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3404 put_device(dev);
3405
3406 put_sess:
3407 put_device(&fnode_sess->dev);
3408
3409 put_host:
3410 scsi_host_put(shost);
3411
3412 exit_set_fnode:
3413 return err;
3414 }
3415
3416 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3417 struct iscsi_uevent *ev, uint32_t len)
3418 {
3419 char *data = (char *)ev + sizeof(*ev);
3420 struct Scsi_Host *shost;
3421 int index;
3422 int err = 0;
3423
3424 if (!transport->new_flashnode) {
3425 err = -ENOSYS;
3426 goto exit_new_fnode;
3427 }
3428
3429 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3430 if (!shost) {
3431 pr_err("%s could not find host no %u\n",
3432 __func__, ev->u.new_flashnode.host_no);
3433 err = -ENODEV;
3434 goto put_host;
3435 }
3436
3437 index = transport->new_flashnode(shost, data, len);
3438
3439 if (index >= 0)
3440 ev->r.new_flashnode_ret.flashnode_idx = index;
3441 else
3442 err = -EIO;
3443
3444 put_host:
3445 scsi_host_put(shost);
3446
3447 exit_new_fnode:
3448 return err;
3449 }
3450
3451 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3452 struct iscsi_uevent *ev)
3453 {
3454 struct Scsi_Host *shost;
3455 struct iscsi_bus_flash_session *fnode_sess;
3456 uint32_t idx;
3457 int err = 0;
3458
3459 if (!transport->del_flashnode) {
3460 err = -ENOSYS;
3461 goto exit_del_fnode;
3462 }
3463
3464 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3465 if (!shost) {
3466 pr_err("%s could not find host no %u\n",
3467 __func__, ev->u.del_flashnode.host_no);
3468 err = -ENODEV;
3469 goto put_host;
3470 }
3471
3472 idx = ev->u.del_flashnode.flashnode_idx;
3473 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3474 if (!fnode_sess) {
3475 pr_err("%s could not find flashnode %u for host no %u\n",
3476 __func__, idx, ev->u.del_flashnode.host_no);
3477 err = -ENODEV;
3478 goto put_host;
3479 }
3480
3481 err = transport->del_flashnode(fnode_sess);
3482 put_device(&fnode_sess->dev);
3483
3484 put_host:
3485 scsi_host_put(shost);
3486
3487 exit_del_fnode:
3488 return err;
3489 }
3490
3491 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3492 struct iscsi_uevent *ev)
3493 {
3494 struct Scsi_Host *shost;
3495 struct iscsi_bus_flash_session *fnode_sess;
3496 struct iscsi_bus_flash_conn *fnode_conn;
3497 struct device *dev;
3498 uint32_t idx;
3499 int err = 0;
3500
3501 if (!transport->login_flashnode) {
3502 err = -ENOSYS;
3503 goto exit_login_fnode;
3504 }
3505
3506 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3507 if (!shost) {
3508 pr_err("%s could not find host no %u\n",
3509 __func__, ev->u.login_flashnode.host_no);
3510 err = -ENODEV;
3511 goto put_host;
3512 }
3513
3514 idx = ev->u.login_flashnode.flashnode_idx;
3515 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3516 if (!fnode_sess) {
3517 pr_err("%s could not find flashnode %u for host no %u\n",
3518 __func__, idx, ev->u.login_flashnode.host_no);
3519 err = -ENODEV;
3520 goto put_host;
3521 }
3522
3523 dev = iscsi_find_flashnode_conn(fnode_sess);
3524 if (!dev) {
3525 err = -ENODEV;
3526 goto put_sess;
3527 }
3528
3529 fnode_conn = iscsi_dev_to_flash_conn(dev);
3530 err = transport->login_flashnode(fnode_sess, fnode_conn);
3531 put_device(dev);
3532
3533 put_sess:
3534 put_device(&fnode_sess->dev);
3535
3536 put_host:
3537 scsi_host_put(shost);
3538
3539 exit_login_fnode:
3540 return err;
3541 }
3542
3543 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3544 struct iscsi_uevent *ev)
3545 {
3546 struct Scsi_Host *shost;
3547 struct iscsi_bus_flash_session *fnode_sess;
3548 struct iscsi_bus_flash_conn *fnode_conn;
3549 struct device *dev;
3550 uint32_t idx;
3551 int err = 0;
3552
3553 if (!transport->logout_flashnode) {
3554 err = -ENOSYS;
3555 goto exit_logout_fnode;
3556 }
3557
3558 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3559 if (!shost) {
3560 pr_err("%s could not find host no %u\n",
3561 __func__, ev->u.logout_flashnode.host_no);
3562 err = -ENODEV;
3563 goto put_host;
3564 }
3565
3566 idx = ev->u.logout_flashnode.flashnode_idx;
3567 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3568 if (!fnode_sess) {
3569 pr_err("%s could not find flashnode %u for host no %u\n",
3570 __func__, idx, ev->u.logout_flashnode.host_no);
3571 err = -ENODEV;
3572 goto put_host;
3573 }
3574
3575 dev = iscsi_find_flashnode_conn(fnode_sess);
3576 if (!dev) {
3577 err = -ENODEV;
3578 goto put_sess;
3579 }
3580
3581 fnode_conn = iscsi_dev_to_flash_conn(dev);
3582
3583 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3584 put_device(dev);
3585
3586 put_sess:
3587 put_device(&fnode_sess->dev);
3588
3589 put_host:
3590 scsi_host_put(shost);
3591
3592 exit_logout_fnode:
3593 return err;
3594 }
3595
3596 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3597 struct iscsi_uevent *ev)
3598 {
3599 struct Scsi_Host *shost;
3600 struct iscsi_cls_session *session;
3601 int err = 0;
3602
3603 if (!transport->logout_flashnode_sid) {
3604 err = -ENOSYS;
3605 goto exit_logout_sid;
3606 }
3607
3608 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3609 if (!shost) {
3610 pr_err("%s could not find host no %u\n",
3611 __func__, ev->u.logout_flashnode.host_no);
3612 err = -ENODEV;
3613 goto put_host;
3614 }
3615
3616 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3617 if (!session) {
3618 pr_err("%s could not find session id %u\n",
3619 __func__, ev->u.logout_flashnode_sid.sid);
3620 err = -EINVAL;
3621 goto put_host;
3622 }
3623
3624 err = transport->logout_flashnode_sid(session);
3625
3626 put_host:
3627 scsi_host_put(shost);
3628
3629 exit_logout_sid:
3630 return err;
3631 }
3632
3633 static int
3634 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3635 {
3636 struct iscsi_uevent *ev = nlmsg_data(nlh);
3637 struct Scsi_Host *shost = NULL;
3638 struct iscsi_internal *priv;
3639 struct sk_buff *skbhost_stats;
3640 struct nlmsghdr *nlhhost_stats;
3641 struct iscsi_uevent *evhost_stats;
3642 int host_stats_size = 0;
3643 int len, err = 0;
3644 char *buf;
3645
3646 if (!transport->get_host_stats)
3647 return -ENOSYS;
3648
3649 priv = iscsi_if_transport_lookup(transport);
3650 if (!priv)
3651 return -EINVAL;
3652
3653 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3654 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3655
3656 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3657 if (!shost) {
3658 pr_err("%s: failed. Could not find host no %u\n",
3659 __func__, ev->u.get_host_stats.host_no);
3660 return -ENODEV;
3661 }
3662
3663 do {
3664 int actual_size;
3665
3666 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3667 if (!skbhost_stats) {
3668 pr_err("cannot deliver host stats: OOM\n");
3669 err = -ENOMEM;
3670 goto exit_host_stats;
3671 }
3672
3673 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3674 (len - sizeof(*nlhhost_stats)), 0);
3675 evhost_stats = nlmsg_data(nlhhost_stats);
3676 memset(evhost_stats, 0, sizeof(*evhost_stats));
3677 evhost_stats->transport_handle = iscsi_handle(transport);
3678 evhost_stats->type = nlh->nlmsg_type;
3679 evhost_stats->u.get_host_stats.host_no =
3680 ev->u.get_host_stats.host_no;
3681 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3682 memset(buf, 0, host_stats_size);
3683
3684 err = transport->get_host_stats(shost, buf, host_stats_size);
3685 if (err) {
3686 kfree_skb(skbhost_stats);
3687 goto exit_host_stats;
3688 }
3689
3690 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3691 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3692 nlhhost_stats->nlmsg_len = actual_size;
3693
3694 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3695 GFP_KERNEL);
3696 } while (err < 0 && err != -ECONNREFUSED);
3697
3698 exit_host_stats:
3699 scsi_host_put(shost);
3700 return err;
3701 }
3702
3703 static int iscsi_if_transport_conn(struct iscsi_transport *transport,
3704 struct nlmsghdr *nlh)
3705 {
3706 struct iscsi_uevent *ev = nlmsg_data(nlh);
3707 struct iscsi_cls_session *session;
3708 struct iscsi_cls_conn *conn = NULL;
3709 struct iscsi_endpoint *ep;
3710 uint32_t pdu_len;
3711 int err = 0;
3712
3713 switch (nlh->nlmsg_type) {
3714 case ISCSI_UEVENT_CREATE_CONN:
3715 return iscsi_if_create_conn(transport, ev);
3716 case ISCSI_UEVENT_DESTROY_CONN:
3717 return iscsi_if_destroy_conn(transport, ev);
3718 case ISCSI_UEVENT_STOP_CONN:
3719 return iscsi_if_stop_conn(transport, ev);
3720 }
3721
3722 /*
3723 * The following cmds need to be run under the ep_mutex so in kernel
3724 * conn cleanup (ep_disconnect + unbind and conn) is not done while
3725 * these are running. They also must not run if we have just run a conn
3726 * cleanup because they would set the state in a way that might allow
3727 * IO or send IO themselves.
3728 */
3729 switch (nlh->nlmsg_type) {
3730 case ISCSI_UEVENT_START_CONN:
3731 conn = iscsi_conn_lookup(ev->u.start_conn.sid,
3732 ev->u.start_conn.cid);
3733 break;
3734 case ISCSI_UEVENT_BIND_CONN:
3735 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3736 break;
3737 case ISCSI_UEVENT_SEND_PDU:
3738 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3739 break;
3740 }
3741
3742 if (!conn)
3743 return -EINVAL;
3744
3745 mutex_lock(&conn->ep_mutex);
3746 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
3747 mutex_unlock(&conn->ep_mutex);
3748 ev->r.retcode = -ENOTCONN;
3749 return 0;
3750 }
3751
3752 switch (nlh->nlmsg_type) {
3753 case ISCSI_UEVENT_BIND_CONN:
3754 session = iscsi_session_lookup(ev->u.b_conn.sid);
3755 if (!session) {
3756 err = -EINVAL;
3757 break;
3758 }
3759
3760 ev->r.retcode = transport->bind_conn(session, conn,
3761 ev->u.b_conn.transport_eph,
3762 ev->u.b_conn.is_leading);
3763 if (!ev->r.retcode)
3764 conn->state = ISCSI_CONN_BOUND;
3765
3766 if (ev->r.retcode || !transport->ep_connect)
3767 break;
3768
3769 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3770 if (ep) {
3771 ep->conn = conn;
3772 conn->ep = ep;
3773 iscsi_put_endpoint(ep);
3774 } else {
3775 err = -ENOTCONN;
3776 iscsi_cls_conn_printk(KERN_ERR, conn,
3777 "Could not set ep conn binding\n");
3778 }
3779 break;
3780 case ISCSI_UEVENT_START_CONN:
3781 ev->r.retcode = transport->start_conn(conn);
3782 if (!ev->r.retcode)
3783 conn->state = ISCSI_CONN_UP;
3784 break;
3785 case ISCSI_UEVENT_SEND_PDU:
3786 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev);
3787
3788 if ((ev->u.send_pdu.hdr_size > pdu_len) ||
3789 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {
3790 err = -EINVAL;
3791 break;
3792 }
3793
3794 ev->r.retcode = transport->send_pdu(conn,
3795 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)),
3796 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3797 ev->u.send_pdu.data_size);
3798 break;
3799 default:
3800 err = -ENOSYS;
3801 }
3802
3803 mutex_unlock(&conn->ep_mutex);
3804 return err;
3805 }
3806
3807 static int
3808 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3809 {
3810 int err = 0;
3811 u32 portid;
3812 struct iscsi_uevent *ev = nlmsg_data(nlh);
3813 struct iscsi_transport *transport = NULL;
3814 struct iscsi_internal *priv;
3815 struct iscsi_cls_session *session;
3816 struct iscsi_endpoint *ep = NULL;
3817
3818 if (!netlink_capable(skb, CAP_SYS_ADMIN))
3819 return -EPERM;
3820
3821 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3822 *group = ISCSI_NL_GRP_UIP;
3823 else
3824 *group = ISCSI_NL_GRP_ISCSID;
3825
3826 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3827 if (!priv)
3828 return -EINVAL;
3829 transport = priv->iscsi_transport;
3830
3831 if (!try_module_get(transport->owner))
3832 return -EINVAL;
3833
3834 portid = NETLINK_CB(skb).portid;
3835
3836 switch (nlh->nlmsg_type) {
3837 case ISCSI_UEVENT_CREATE_SESSION:
3838 err = iscsi_if_create_session(priv, ep, ev,
3839 portid,
3840 ev->u.c_session.initial_cmdsn,
3841 ev->u.c_session.cmds_max,
3842 ev->u.c_session.queue_depth);
3843 break;
3844 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3845 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3846 if (!ep) {
3847 err = -EINVAL;
3848 break;
3849 }
3850
3851 err = iscsi_if_create_session(priv, ep, ev,
3852 portid,
3853 ev->u.c_bound_session.initial_cmdsn,
3854 ev->u.c_bound_session.cmds_max,
3855 ev->u.c_bound_session.queue_depth);
3856 iscsi_put_endpoint(ep);
3857 break;
3858 case ISCSI_UEVENT_DESTROY_SESSION:
3859 session = iscsi_session_lookup(ev->u.d_session.sid);
3860 if (!session)
3861 err = -EINVAL;
3862 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3863 err = -EBUSY;
3864 else
3865 transport->destroy_session(session);
3866 break;
3867 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3868 session = iscsi_session_lookup(ev->u.d_session.sid);
3869 if (!session)
3870 err = -EINVAL;
3871 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3872 err = -EBUSY;
3873 else {
3874 unsigned long flags;
3875
3876 /* Prevent this session from being found again */
3877 spin_lock_irqsave(&sesslock, flags);
3878 list_del_init(&session->sess_list);
3879 spin_unlock_irqrestore(&sesslock, flags);
3880
3881 queue_work(system_unbound_wq, &session->destroy_work);
3882 }
3883 break;
3884 case ISCSI_UEVENT_UNBIND_SESSION:
3885 session = iscsi_session_lookup(ev->u.d_session.sid);
3886 if (session)
3887 scsi_queue_work(iscsi_session_to_shost(session),
3888 &session->unbind_work);
3889 else
3890 err = -EINVAL;
3891 break;
3892 case ISCSI_UEVENT_SET_PARAM:
3893 err = iscsi_set_param(transport, ev);
3894 break;
3895 case ISCSI_UEVENT_CREATE_CONN:
3896 case ISCSI_UEVENT_DESTROY_CONN:
3897 case ISCSI_UEVENT_STOP_CONN:
3898 case ISCSI_UEVENT_START_CONN:
3899 case ISCSI_UEVENT_BIND_CONN:
3900 case ISCSI_UEVENT_SEND_PDU:
3901 err = iscsi_if_transport_conn(transport, nlh);
3902 break;
3903 case ISCSI_UEVENT_GET_STATS:
3904 err = iscsi_if_get_stats(transport, nlh);
3905 break;
3906 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3907 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3908 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3909 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3910 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3911 break;
3912 case ISCSI_UEVENT_TGT_DSCVR:
3913 err = iscsi_tgt_dscvr(transport, ev);
3914 break;
3915 case ISCSI_UEVENT_SET_HOST_PARAM:
3916 err = iscsi_set_host_param(transport, ev);
3917 break;
3918 case ISCSI_UEVENT_PATH_UPDATE:
3919 err = iscsi_set_path(transport, ev);
3920 break;
3921 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3922 err = iscsi_set_iface_params(transport, ev,
3923 nlmsg_attrlen(nlh, sizeof(*ev)));
3924 break;
3925 case ISCSI_UEVENT_PING:
3926 err = iscsi_send_ping(transport, ev);
3927 break;
3928 case ISCSI_UEVENT_GET_CHAP:
3929 err = iscsi_get_chap(transport, nlh);
3930 break;
3931 case ISCSI_UEVENT_DELETE_CHAP:
3932 err = iscsi_delete_chap(transport, ev);
3933 break;
3934 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3935 err = iscsi_set_flashnode_param(transport, ev,
3936 nlmsg_attrlen(nlh,
3937 sizeof(*ev)));
3938 break;
3939 case ISCSI_UEVENT_NEW_FLASHNODE:
3940 err = iscsi_new_flashnode(transport, ev,
3941 nlmsg_attrlen(nlh, sizeof(*ev)));
3942 break;
3943 case ISCSI_UEVENT_DEL_FLASHNODE:
3944 err = iscsi_del_flashnode(transport, ev);
3945 break;
3946 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3947 err = iscsi_login_flashnode(transport, ev);
3948 break;
3949 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3950 err = iscsi_logout_flashnode(transport, ev);
3951 break;
3952 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3953 err = iscsi_logout_flashnode_sid(transport, ev);
3954 break;
3955 case ISCSI_UEVENT_SET_CHAP:
3956 err = iscsi_set_chap(transport, ev,
3957 nlmsg_attrlen(nlh, sizeof(*ev)));
3958 break;
3959 case ISCSI_UEVENT_GET_HOST_STATS:
3960 err = iscsi_get_host_stats(transport, nlh);
3961 break;
3962 default:
3963 err = -ENOSYS;
3964 break;
3965 }
3966
3967 module_put(transport->owner);
3968 return err;
3969 }
3970
3971 /*
3972 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3973 * Malformed skbs with wrong lengths or invalid creds are not processed.
3974 */
3975 static void
3976 iscsi_if_rx(struct sk_buff *skb)
3977 {
3978 u32 portid = NETLINK_CB(skb).portid;
3979
3980 mutex_lock(&rx_queue_mutex);
3981 while (skb->len >= NLMSG_HDRLEN) {
3982 int err;
3983 uint32_t rlen;
3984 struct nlmsghdr *nlh;
3985 struct iscsi_uevent *ev;
3986 uint32_t group;
3987 int retries = ISCSI_SEND_MAX_ALLOWED;
3988
3989 nlh = nlmsg_hdr(skb);
3990 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3991 skb->len < nlh->nlmsg_len) {
3992 break;
3993 }
3994
3995 ev = nlmsg_data(nlh);
3996 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3997 if (rlen > skb->len)
3998 rlen = skb->len;
3999
4000 err = iscsi_if_recv_msg(skb, nlh, &group);
4001 if (err) {
4002 ev->type = ISCSI_KEVENT_IF_ERROR;
4003 ev->iferror = err;
4004 }
4005 do {
4006 /*
4007 * special case for GET_STATS:
4008 * on success - sending reply and stats from
4009 * inside of if_recv_msg(),
4010 * on error - fall through.
4011 */
4012 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
4013 break;
4014 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
4015 break;
4016 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
4017 ev, sizeof(*ev));
4018 if (err == -EAGAIN && --retries < 0) {
4019 printk(KERN_WARNING "Send reply failed, error %d\n", err);
4020 break;
4021 }
4022 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
4023 skb_pull(skb, rlen);
4024 }
4025 mutex_unlock(&rx_queue_mutex);
4026 }
4027
4028 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
4029 struct device_attribute dev_attr_##_prefix##_##_name = \
4030 __ATTR(_name,_mode,_show,_store)
4031
4032 /*
4033 * iSCSI connection attrs
4034 */
4035 #define iscsi_conn_attr_show(param) \
4036 static ssize_t \
4037 show_conn_param_##param(struct device *dev, \
4038 struct device_attribute *attr, char *buf) \
4039 { \
4040 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
4041 struct iscsi_transport *t = conn->transport; \
4042 return t->get_conn_param(conn, param, buf); \
4043 }
4044
4045 #define iscsi_conn_attr(field, param) \
4046 iscsi_conn_attr_show(param) \
4047 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
4048 NULL);
4049
4050 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
4051 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
4052 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
4053 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
4054 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
4055 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
4056 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
4057 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
4058 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
4059 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
4060 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
4061 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
4062 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
4063 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
4064 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
4065 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
4066 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
4067 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
4068 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
4069 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
4070 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
4071 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
4072 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
4073 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
4074 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
4075 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
4076 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
4077 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
4078
4079 static const char *const connection_state_names[] = {
4080 [ISCSI_CONN_UP] = "up",
4081 [ISCSI_CONN_DOWN] = "down",
4082 [ISCSI_CONN_FAILED] = "failed",
4083 [ISCSI_CONN_BOUND] = "bound"
4084 };
4085
4086 static ssize_t show_conn_state(struct device *dev,
4087 struct device_attribute *attr, char *buf)
4088 {
4089 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
4090 const char *state = "unknown";
4091
4092 if (conn->state >= 0 &&
4093 conn->state < ARRAY_SIZE(connection_state_names))
4094 state = connection_state_names[conn->state];
4095
4096 return sysfs_emit(buf, "%s\n", state);
4097 }
4098 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
4099 NULL);
4100
4101 #define iscsi_conn_ep_attr_show(param) \
4102 static ssize_t show_conn_ep_param_##param(struct device *dev, \
4103 struct device_attribute *attr,\
4104 char *buf) \
4105 { \
4106 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
4107 struct iscsi_transport *t = conn->transport; \
4108 struct iscsi_endpoint *ep; \
4109 ssize_t rc; \
4110 \
4111 /* \
4112 * Need to make sure ep_disconnect does not free the LLD's \
4113 * interconnect resources while we are trying to read them. \
4114 */ \
4115 mutex_lock(&conn->ep_mutex); \
4116 ep = conn->ep; \
4117 if (!ep && t->ep_connect) { \
4118 mutex_unlock(&conn->ep_mutex); \
4119 return -ENOTCONN; \
4120 } \
4121 \
4122 if (ep) \
4123 rc = t->get_ep_param(ep, param, buf); \
4124 else \
4125 rc = t->get_conn_param(conn, param, buf); \
4126 mutex_unlock(&conn->ep_mutex); \
4127 return rc; \
4128 }
4129
4130 #define iscsi_conn_ep_attr(field, param) \
4131 iscsi_conn_ep_attr_show(param) \
4132 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
4133 show_conn_ep_param_##param, NULL);
4134
4135 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
4136 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
4137
4138 static struct attribute *iscsi_conn_attrs[] = {
4139 &dev_attr_conn_max_recv_dlength.attr,
4140 &dev_attr_conn_max_xmit_dlength.attr,
4141 &dev_attr_conn_header_digest.attr,
4142 &dev_attr_conn_data_digest.attr,
4143 &dev_attr_conn_ifmarker.attr,
4144 &dev_attr_conn_ofmarker.attr,
4145 &dev_attr_conn_address.attr,
4146 &dev_attr_conn_port.attr,
4147 &dev_attr_conn_exp_statsn.attr,
4148 &dev_attr_conn_persistent_address.attr,
4149 &dev_attr_conn_persistent_port.attr,
4150 &dev_attr_conn_ping_tmo.attr,
4151 &dev_attr_conn_recv_tmo.attr,
4152 &dev_attr_conn_local_port.attr,
4153 &dev_attr_conn_statsn.attr,
4154 &dev_attr_conn_keepalive_tmo.attr,
4155 &dev_attr_conn_max_segment_size.attr,
4156 &dev_attr_conn_tcp_timestamp_stat.attr,
4157 &dev_attr_conn_tcp_wsf_disable.attr,
4158 &dev_attr_conn_tcp_nagle_disable.attr,
4159 &dev_attr_conn_tcp_timer_scale.attr,
4160 &dev_attr_conn_tcp_timestamp_enable.attr,
4161 &dev_attr_conn_fragment_disable.attr,
4162 &dev_attr_conn_ipv4_tos.attr,
4163 &dev_attr_conn_ipv6_traffic_class.attr,
4164 &dev_attr_conn_ipv6_flow_label.attr,
4165 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4166 &dev_attr_conn_tcp_xmit_wsf.attr,
4167 &dev_attr_conn_tcp_recv_wsf.attr,
4168 &dev_attr_conn_local_ipaddr.attr,
4169 &dev_attr_conn_state.attr,
4170 NULL,
4171 };
4172
4173 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4174 struct attribute *attr, int i)
4175 {
4176 struct device *cdev = container_of(kobj, struct device, kobj);
4177 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4178 struct iscsi_transport *t = conn->transport;
4179 int param;
4180
4181 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4182 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4183 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4184 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4185 else if (attr == &dev_attr_conn_header_digest.attr)
4186 param = ISCSI_PARAM_HDRDGST_EN;
4187 else if (attr == &dev_attr_conn_data_digest.attr)
4188 param = ISCSI_PARAM_DATADGST_EN;
4189 else if (attr == &dev_attr_conn_ifmarker.attr)
4190 param = ISCSI_PARAM_IFMARKER_EN;
4191 else if (attr == &dev_attr_conn_ofmarker.attr)
4192 param = ISCSI_PARAM_OFMARKER_EN;
4193 else if (attr == &dev_attr_conn_address.attr)
4194 param = ISCSI_PARAM_CONN_ADDRESS;
4195 else if (attr == &dev_attr_conn_port.attr)
4196 param = ISCSI_PARAM_CONN_PORT;
4197 else if (attr == &dev_attr_conn_exp_statsn.attr)
4198 param = ISCSI_PARAM_EXP_STATSN;
4199 else if (attr == &dev_attr_conn_persistent_address.attr)
4200 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4201 else if (attr == &dev_attr_conn_persistent_port.attr)
4202 param = ISCSI_PARAM_PERSISTENT_PORT;
4203 else if (attr == &dev_attr_conn_ping_tmo.attr)
4204 param = ISCSI_PARAM_PING_TMO;
4205 else if (attr == &dev_attr_conn_recv_tmo.attr)
4206 param = ISCSI_PARAM_RECV_TMO;
4207 else if (attr == &dev_attr_conn_local_port.attr)
4208 param = ISCSI_PARAM_LOCAL_PORT;
4209 else if (attr == &dev_attr_conn_statsn.attr)
4210 param = ISCSI_PARAM_STATSN;
4211 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4212 param = ISCSI_PARAM_KEEPALIVE_TMO;
4213 else if (attr == &dev_attr_conn_max_segment_size.attr)
4214 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4215 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4216 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4217 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4218 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4219 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4220 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4221 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4222 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4223 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4224 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4225 else if (attr == &dev_attr_conn_fragment_disable.attr)
4226 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4227 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4228 param = ISCSI_PARAM_IPV4_TOS;
4229 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4230 param = ISCSI_PARAM_IPV6_TC;
4231 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4232 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4233 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4234 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4235 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4236 param = ISCSI_PARAM_TCP_XMIT_WSF;
4237 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4238 param = ISCSI_PARAM_TCP_RECV_WSF;
4239 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4240 param = ISCSI_PARAM_LOCAL_IPADDR;
4241 else if (attr == &dev_attr_conn_state.attr)
4242 return S_IRUGO;
4243 else {
4244 WARN_ONCE(1, "Invalid conn attr");
4245 return 0;
4246 }
4247
4248 return t->attr_is_visible(ISCSI_PARAM, param);
4249 }
4250
4251 static struct attribute_group iscsi_conn_group = {
4252 .attrs = iscsi_conn_attrs,
4253 .is_visible = iscsi_conn_attr_is_visible,
4254 };
4255
4256 /*
4257 * iSCSI session attrs
4258 */
4259 #define iscsi_session_attr_show(param, perm) \
4260 static ssize_t \
4261 show_session_param_##param(struct device *dev, \
4262 struct device_attribute *attr, char *buf) \
4263 { \
4264 struct iscsi_cls_session *session = \
4265 iscsi_dev_to_session(dev->parent); \
4266 struct iscsi_transport *t = session->transport; \
4267 \
4268 if (perm && !capable(CAP_SYS_ADMIN)) \
4269 return -EACCES; \
4270 return t->get_session_param(session, param, buf); \
4271 }
4272
4273 #define iscsi_session_attr(field, param, perm) \
4274 iscsi_session_attr_show(param, perm) \
4275 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4276 NULL);
4277 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4278 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4279 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4280 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4281 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4282 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4283 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4284 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4285 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4286 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4287 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4288 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4289 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4290 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4291 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4292 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4293 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4294 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4295 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4296 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4297 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4298 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4299 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4300 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4301 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4302 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4303 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4304 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4305 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4306 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4307 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4308 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4309 iscsi_session_attr(discovery_auth_optional,
4310 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4311 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4312 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4313 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4314 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4315 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4316 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4317 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4318
4319 static ssize_t
4320 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4321 char *buf)
4322 {
4323 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4324 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));
4325 }
4326 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4327 NULL);
4328 static ssize_t
4329 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4330 char *buf)
4331 {
4332 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4333 return sysfs_emit(buf, "%d\n", session->creator);
4334 }
4335 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4336 NULL);
4337 static ssize_t
4338 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4339 char *buf)
4340 {
4341 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4342 return sysfs_emit(buf, "%d\n", session->target_id);
4343 }
4344 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4345 show_priv_session_target_id, NULL);
4346
4347 #define iscsi_priv_session_attr_show(field, format) \
4348 static ssize_t \
4349 show_priv_session_##field(struct device *dev, \
4350 struct device_attribute *attr, char *buf) \
4351 { \
4352 struct iscsi_cls_session *session = \
4353 iscsi_dev_to_session(dev->parent); \
4354 if (session->field == -1) \
4355 return sysfs_emit(buf, "off\n"); \
4356 return sysfs_emit(buf, format"\n", session->field); \
4357 }
4358
4359 #define iscsi_priv_session_attr_store(field) \
4360 static ssize_t \
4361 store_priv_session_##field(struct device *dev, \
4362 struct device_attribute *attr, \
4363 const char *buf, size_t count) \
4364 { \
4365 int val; \
4366 char *cp; \
4367 struct iscsi_cls_session *session = \
4368 iscsi_dev_to_session(dev->parent); \
4369 if ((session->state == ISCSI_SESSION_FREE) || \
4370 (session->state == ISCSI_SESSION_FAILED)) \
4371 return -EBUSY; \
4372 if (strncmp(buf, "off", 3) == 0) { \
4373 session->field = -1; \
4374 session->field##_sysfs_override = true; \
4375 } else { \
4376 val = simple_strtoul(buf, &cp, 0); \
4377 if (*cp != '\0' && *cp != '\n') \
4378 return -EINVAL; \
4379 session->field = val; \
4380 session->field##_sysfs_override = true; \
4381 } \
4382 return count; \
4383 }
4384
4385 #define iscsi_priv_session_rw_attr(field, format) \
4386 iscsi_priv_session_attr_show(field, format) \
4387 iscsi_priv_session_attr_store(field) \
4388 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4389 show_priv_session_##field, \
4390 store_priv_session_##field)
4391
4392 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4393
4394 static struct attribute *iscsi_session_attrs[] = {
4395 &dev_attr_sess_initial_r2t.attr,
4396 &dev_attr_sess_max_outstanding_r2t.attr,
4397 &dev_attr_sess_immediate_data.attr,
4398 &dev_attr_sess_first_burst_len.attr,
4399 &dev_attr_sess_max_burst_len.attr,
4400 &dev_attr_sess_data_pdu_in_order.attr,
4401 &dev_attr_sess_data_seq_in_order.attr,
4402 &dev_attr_sess_erl.attr,
4403 &dev_attr_sess_targetname.attr,
4404 &dev_attr_sess_tpgt.attr,
4405 &dev_attr_sess_password.attr,
4406 &dev_attr_sess_password_in.attr,
4407 &dev_attr_sess_username.attr,
4408 &dev_attr_sess_username_in.attr,
4409 &dev_attr_sess_fast_abort.attr,
4410 &dev_attr_sess_abort_tmo.attr,
4411 &dev_attr_sess_lu_reset_tmo.attr,
4412 &dev_attr_sess_tgt_reset_tmo.attr,
4413 &dev_attr_sess_ifacename.attr,
4414 &dev_attr_sess_initiatorname.attr,
4415 &dev_attr_sess_targetalias.attr,
4416 &dev_attr_sess_boot_root.attr,
4417 &dev_attr_sess_boot_nic.attr,
4418 &dev_attr_sess_boot_target.attr,
4419 &dev_attr_priv_sess_recovery_tmo.attr,
4420 &dev_attr_priv_sess_state.attr,
4421 &dev_attr_priv_sess_creator.attr,
4422 &dev_attr_sess_chap_out_idx.attr,
4423 &dev_attr_sess_chap_in_idx.attr,
4424 &dev_attr_priv_sess_target_id.attr,
4425 &dev_attr_sess_auto_snd_tgt_disable.attr,
4426 &dev_attr_sess_discovery_session.attr,
4427 &dev_attr_sess_portal_type.attr,
4428 &dev_attr_sess_chap_auth.attr,
4429 &dev_attr_sess_discovery_logout.attr,
4430 &dev_attr_sess_bidi_chap.attr,
4431 &dev_attr_sess_discovery_auth_optional.attr,
4432 &dev_attr_sess_def_time2wait.attr,
4433 &dev_attr_sess_def_time2retain.attr,
4434 &dev_attr_sess_isid.attr,
4435 &dev_attr_sess_tsid.attr,
4436 &dev_attr_sess_def_taskmgmt_tmo.attr,
4437 &dev_attr_sess_discovery_parent_idx.attr,
4438 &dev_attr_sess_discovery_parent_type.attr,
4439 NULL,
4440 };
4441
4442 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4443 struct attribute *attr, int i)
4444 {
4445 struct device *cdev = container_of(kobj, struct device, kobj);
4446 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4447 struct iscsi_transport *t = session->transport;
4448 int param;
4449
4450 if (attr == &dev_attr_sess_initial_r2t.attr)
4451 param = ISCSI_PARAM_INITIAL_R2T_EN;
4452 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4453 param = ISCSI_PARAM_MAX_R2T;
4454 else if (attr == &dev_attr_sess_immediate_data.attr)
4455 param = ISCSI_PARAM_IMM_DATA_EN;
4456 else if (attr == &dev_attr_sess_first_burst_len.attr)
4457 param = ISCSI_PARAM_FIRST_BURST;
4458 else if (attr == &dev_attr_sess_max_burst_len.attr)
4459 param = ISCSI_PARAM_MAX_BURST;
4460 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4461 param = ISCSI_PARAM_PDU_INORDER_EN;
4462 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4463 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4464 else if (attr == &dev_attr_sess_erl.attr)
4465 param = ISCSI_PARAM_ERL;
4466 else if (attr == &dev_attr_sess_targetname.attr)
4467 param = ISCSI_PARAM_TARGET_NAME;
4468 else if (attr == &dev_attr_sess_tpgt.attr)
4469 param = ISCSI_PARAM_TPGT;
4470 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4471 param = ISCSI_PARAM_CHAP_IN_IDX;
4472 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4473 param = ISCSI_PARAM_CHAP_OUT_IDX;
4474 else if (attr == &dev_attr_sess_password.attr)
4475 param = ISCSI_PARAM_USERNAME;
4476 else if (attr == &dev_attr_sess_password_in.attr)
4477 param = ISCSI_PARAM_USERNAME_IN;
4478 else if (attr == &dev_attr_sess_username.attr)
4479 param = ISCSI_PARAM_PASSWORD;
4480 else if (attr == &dev_attr_sess_username_in.attr)
4481 param = ISCSI_PARAM_PASSWORD_IN;
4482 else if (attr == &dev_attr_sess_fast_abort.attr)
4483 param = ISCSI_PARAM_FAST_ABORT;
4484 else if (attr == &dev_attr_sess_abort_tmo.attr)
4485 param = ISCSI_PARAM_ABORT_TMO;
4486 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4487 param = ISCSI_PARAM_LU_RESET_TMO;
4488 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4489 param = ISCSI_PARAM_TGT_RESET_TMO;
4490 else if (attr == &dev_attr_sess_ifacename.attr)
4491 param = ISCSI_PARAM_IFACE_NAME;
4492 else if (attr == &dev_attr_sess_initiatorname.attr)
4493 param = ISCSI_PARAM_INITIATOR_NAME;
4494 else if (attr == &dev_attr_sess_targetalias.attr)
4495 param = ISCSI_PARAM_TARGET_ALIAS;
4496 else if (attr == &dev_attr_sess_boot_root.attr)
4497 param = ISCSI_PARAM_BOOT_ROOT;
4498 else if (attr == &dev_attr_sess_boot_nic.attr)
4499 param = ISCSI_PARAM_BOOT_NIC;
4500 else if (attr == &dev_attr_sess_boot_target.attr)
4501 param = ISCSI_PARAM_BOOT_TARGET;
4502 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4503 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4504 else if (attr == &dev_attr_sess_discovery_session.attr)
4505 param = ISCSI_PARAM_DISCOVERY_SESS;
4506 else if (attr == &dev_attr_sess_portal_type.attr)
4507 param = ISCSI_PARAM_PORTAL_TYPE;
4508 else if (attr == &dev_attr_sess_chap_auth.attr)
4509 param = ISCSI_PARAM_CHAP_AUTH_EN;
4510 else if (attr == &dev_attr_sess_discovery_logout.attr)
4511 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4512 else if (attr == &dev_attr_sess_bidi_chap.attr)
4513 param = ISCSI_PARAM_BIDI_CHAP_EN;
4514 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4515 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4516 else if (attr == &dev_attr_sess_def_time2wait.attr)
4517 param = ISCSI_PARAM_DEF_TIME2WAIT;
4518 else if (attr == &dev_attr_sess_def_time2retain.attr)
4519 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4520 else if (attr == &dev_attr_sess_isid.attr)
4521 param = ISCSI_PARAM_ISID;
4522 else if (attr == &dev_attr_sess_tsid.attr)
4523 param = ISCSI_PARAM_TSID;
4524 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4525 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4526 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4527 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4528 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4529 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4530 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4531 return S_IRUGO | S_IWUSR;
4532 else if (attr == &dev_attr_priv_sess_state.attr)
4533 return S_IRUGO;
4534 else if (attr == &dev_attr_priv_sess_creator.attr)
4535 return S_IRUGO;
4536 else if (attr == &dev_attr_priv_sess_target_id.attr)
4537 return S_IRUGO;
4538 else {
4539 WARN_ONCE(1, "Invalid session attr");
4540 return 0;
4541 }
4542
4543 return t->attr_is_visible(ISCSI_PARAM, param);
4544 }
4545
4546 static struct attribute_group iscsi_session_group = {
4547 .attrs = iscsi_session_attrs,
4548 .is_visible = iscsi_session_attr_is_visible,
4549 };
4550
4551 /*
4552 * iSCSI host attrs
4553 */
4554 #define iscsi_host_attr_show(param) \
4555 static ssize_t \
4556 show_host_param_##param(struct device *dev, \
4557 struct device_attribute *attr, char *buf) \
4558 { \
4559 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4560 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4561 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4562 }
4563
4564 #define iscsi_host_attr(field, param) \
4565 iscsi_host_attr_show(param) \
4566 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4567 NULL);
4568
4569 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4570 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4571 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4572 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4573 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4574 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4575
4576 static struct attribute *iscsi_host_attrs[] = {
4577 &dev_attr_host_netdev.attr,
4578 &dev_attr_host_hwaddress.attr,
4579 &dev_attr_host_ipaddress.attr,
4580 &dev_attr_host_initiatorname.attr,
4581 &dev_attr_host_port_state.attr,
4582 &dev_attr_host_port_speed.attr,
4583 NULL,
4584 };
4585
4586 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4587 struct attribute *attr, int i)
4588 {
4589 struct device *cdev = container_of(kobj, struct device, kobj);
4590 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4591 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4592 int param;
4593
4594 if (attr == &dev_attr_host_netdev.attr)
4595 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4596 else if (attr == &dev_attr_host_hwaddress.attr)
4597 param = ISCSI_HOST_PARAM_HWADDRESS;
4598 else if (attr == &dev_attr_host_ipaddress.attr)
4599 param = ISCSI_HOST_PARAM_IPADDRESS;
4600 else if (attr == &dev_attr_host_initiatorname.attr)
4601 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4602 else if (attr == &dev_attr_host_port_state.attr)
4603 param = ISCSI_HOST_PARAM_PORT_STATE;
4604 else if (attr == &dev_attr_host_port_speed.attr)
4605 param = ISCSI_HOST_PARAM_PORT_SPEED;
4606 else {
4607 WARN_ONCE(1, "Invalid host attr");
4608 return 0;
4609 }
4610
4611 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4612 }
4613
4614 static struct attribute_group iscsi_host_group = {
4615 .attrs = iscsi_host_attrs,
4616 .is_visible = iscsi_host_attr_is_visible,
4617 };
4618
4619 /* convert iscsi_port_speed values to ascii string name */
4620 static const struct {
4621 enum iscsi_port_speed value;
4622 char *name;
4623 } iscsi_port_speed_names[] = {
4624 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4625 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4626 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4627 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4628 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4629 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4630 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4631 };
4632
4633 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4634 {
4635 int i;
4636 char *speed = "Unknown!";
4637 struct iscsi_cls_host *ihost = shost->shost_data;
4638 uint32_t port_speed = ihost->port_speed;
4639
4640 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4641 if (iscsi_port_speed_names[i].value & port_speed) {
4642 speed = iscsi_port_speed_names[i].name;
4643 break;
4644 }
4645 }
4646 return speed;
4647 }
4648 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4649
4650 /* convert iscsi_port_state values to ascii string name */
4651 static const struct {
4652 enum iscsi_port_state value;
4653 char *name;
4654 } iscsi_port_state_names[] = {
4655 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4656 {ISCSI_PORT_STATE_UP, "LINK UP" },
4657 };
4658
4659 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4660 {
4661 int i;
4662 char *state = "Unknown!";
4663 struct iscsi_cls_host *ihost = shost->shost_data;
4664 uint32_t port_state = ihost->port_state;
4665
4666 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4667 if (iscsi_port_state_names[i].value & port_state) {
4668 state = iscsi_port_state_names[i].name;
4669 break;
4670 }
4671 }
4672 return state;
4673 }
4674 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4675
4676 static int iscsi_session_match(struct attribute_container *cont,
4677 struct device *dev)
4678 {
4679 struct iscsi_cls_session *session;
4680 struct Scsi_Host *shost;
4681 struct iscsi_internal *priv;
4682
4683 if (!iscsi_is_session_dev(dev))
4684 return 0;
4685
4686 session = iscsi_dev_to_session(dev);
4687 shost = iscsi_session_to_shost(session);
4688 if (!shost->transportt)
4689 return 0;
4690
4691 priv = to_iscsi_internal(shost->transportt);
4692 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4693 return 0;
4694
4695 return &priv->session_cont.ac == cont;
4696 }
4697
4698 static int iscsi_conn_match(struct attribute_container *cont,
4699 struct device *dev)
4700 {
4701 struct iscsi_cls_session *session;
4702 struct iscsi_cls_conn *conn;
4703 struct Scsi_Host *shost;
4704 struct iscsi_internal *priv;
4705
4706 if (!iscsi_is_conn_dev(dev))
4707 return 0;
4708
4709 conn = iscsi_dev_to_conn(dev);
4710 session = iscsi_dev_to_session(conn->dev.parent);
4711 shost = iscsi_session_to_shost(session);
4712
4713 if (!shost->transportt)
4714 return 0;
4715
4716 priv = to_iscsi_internal(shost->transportt);
4717 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4718 return 0;
4719
4720 return &priv->conn_cont.ac == cont;
4721 }
4722
4723 static int iscsi_host_match(struct attribute_container *cont,
4724 struct device *dev)
4725 {
4726 struct Scsi_Host *shost;
4727 struct iscsi_internal *priv;
4728
4729 if (!scsi_is_host_device(dev))
4730 return 0;
4731
4732 shost = dev_to_shost(dev);
4733 if (!shost->transportt ||
4734 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4735 return 0;
4736
4737 priv = to_iscsi_internal(shost->transportt);
4738 return &priv->t.host_attrs.ac == cont;
4739 }
4740
4741 struct scsi_transport_template *
4742 iscsi_register_transport(struct iscsi_transport *tt)
4743 {
4744 struct iscsi_internal *priv;
4745 unsigned long flags;
4746 int err;
4747
4748 BUG_ON(!tt);
4749 WARN_ON(tt->ep_disconnect && !tt->unbind_conn);
4750
4751 priv = iscsi_if_transport_lookup(tt);
4752 if (priv)
4753 return NULL;
4754
4755 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4756 if (!priv)
4757 return NULL;
4758 INIT_LIST_HEAD(&priv->list);
4759 priv->iscsi_transport = tt;
4760 priv->t.user_scan = iscsi_user_scan;
4761 priv->t.create_work_queue = 1;
4762
4763 priv->dev.class = &iscsi_transport_class;
4764 dev_set_name(&priv->dev, "%s", tt->name);
4765 err = device_register(&priv->dev);
4766 if (err)
4767 goto free_priv;
4768
4769 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4770 if (err)
4771 goto unregister_dev;
4772
4773 /* host parameters */
4774 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4775 priv->t.host_attrs.ac.match = iscsi_host_match;
4776 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4777 priv->t.host_size = sizeof(struct iscsi_cls_host);
4778 transport_container_register(&priv->t.host_attrs);
4779
4780 /* connection parameters */
4781 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4782 priv->conn_cont.ac.match = iscsi_conn_match;
4783 priv->conn_cont.ac.grp = &iscsi_conn_group;
4784 transport_container_register(&priv->conn_cont);
4785
4786 /* session parameters */
4787 priv->session_cont.ac.class = &iscsi_session_class.class;
4788 priv->session_cont.ac.match = iscsi_session_match;
4789 priv->session_cont.ac.grp = &iscsi_session_group;
4790 transport_container_register(&priv->session_cont);
4791
4792 spin_lock_irqsave(&iscsi_transport_lock, flags);
4793 list_add(&priv->list, &iscsi_transports);
4794 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4795
4796 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4797 return &priv->t;
4798
4799 unregister_dev:
4800 device_unregister(&priv->dev);
4801 return NULL;
4802 free_priv:
4803 kfree(priv);
4804 return NULL;
4805 }
4806 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4807
4808 int iscsi_unregister_transport(struct iscsi_transport *tt)
4809 {
4810 struct iscsi_internal *priv;
4811 unsigned long flags;
4812
4813 BUG_ON(!tt);
4814
4815 mutex_lock(&rx_queue_mutex);
4816
4817 priv = iscsi_if_transport_lookup(tt);
4818 BUG_ON (!priv);
4819
4820 spin_lock_irqsave(&iscsi_transport_lock, flags);
4821 list_del(&priv->list);
4822 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4823
4824 transport_container_unregister(&priv->conn_cont);
4825 transport_container_unregister(&priv->session_cont);
4826 transport_container_unregister(&priv->t.host_attrs);
4827
4828 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4829 device_unregister(&priv->dev);
4830 mutex_unlock(&rx_queue_mutex);
4831
4832 return 0;
4833 }
4834 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4835
4836 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4837 struct device *dev, const char *fmt, ...)
4838 {
4839 struct va_format vaf;
4840 va_list args;
4841
4842 va_start(args, fmt);
4843 vaf.fmt = fmt;
4844 vaf.va = &args;
4845 trace(dev, &vaf);
4846 va_end(args);
4847 }
4848 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4849
4850 static __init int iscsi_transport_init(void)
4851 {
4852 int err;
4853 struct netlink_kernel_cfg cfg = {
4854 .groups = 1,
4855 .input = iscsi_if_rx,
4856 };
4857 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4858 ISCSI_TRANSPORT_VERSION);
4859
4860 atomic_set(&iscsi_session_nr, 0);
4861
4862 err = class_register(&iscsi_transport_class);
4863 if (err)
4864 return err;
4865
4866 err = class_register(&iscsi_endpoint_class);
4867 if (err)
4868 goto unregister_transport_class;
4869
4870 err = class_register(&iscsi_iface_class);
4871 if (err)
4872 goto unregister_endpoint_class;
4873
4874 err = transport_class_register(&iscsi_host_class);
4875 if (err)
4876 goto unregister_iface_class;
4877
4878 err = transport_class_register(&iscsi_connection_class);
4879 if (err)
4880 goto unregister_host_class;
4881
4882 err = transport_class_register(&iscsi_session_class);
4883 if (err)
4884 goto unregister_conn_class;
4885
4886 err = bus_register(&iscsi_flashnode_bus);
4887 if (err)
4888 goto unregister_session_class;
4889
4890 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4891 if (!nls) {
4892 err = -ENOBUFS;
4893 goto unregister_flashnode_bus;
4894 }
4895
4896 iscsi_eh_timer_workq = alloc_workqueue("%s",
4897 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
4898 1, "iscsi_eh");
4899 if (!iscsi_eh_timer_workq) {
4900 err = -ENOMEM;
4901 goto release_nls;
4902 }
4903
4904 iscsi_conn_cleanup_workq = alloc_workqueue("%s",
4905 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0,
4906 "iscsi_conn_cleanup");
4907 if (!iscsi_conn_cleanup_workq) {
4908 err = -ENOMEM;
4909 goto destroy_wq;
4910 }
4911
4912 return 0;
4913
4914 destroy_wq:
4915 destroy_workqueue(iscsi_eh_timer_workq);
4916 release_nls:
4917 netlink_kernel_release(nls);
4918 unregister_flashnode_bus:
4919 bus_unregister(&iscsi_flashnode_bus);
4920 unregister_session_class:
4921 transport_class_unregister(&iscsi_session_class);
4922 unregister_conn_class:
4923 transport_class_unregister(&iscsi_connection_class);
4924 unregister_host_class:
4925 transport_class_unregister(&iscsi_host_class);
4926 unregister_iface_class:
4927 class_unregister(&iscsi_iface_class);
4928 unregister_endpoint_class:
4929 class_unregister(&iscsi_endpoint_class);
4930 unregister_transport_class:
4931 class_unregister(&iscsi_transport_class);
4932 return err;
4933 }
4934
4935 static void __exit iscsi_transport_exit(void)
4936 {
4937 destroy_workqueue(iscsi_conn_cleanup_workq);
4938 destroy_workqueue(iscsi_eh_timer_workq);
4939 netlink_kernel_release(nls);
4940 bus_unregister(&iscsi_flashnode_bus);
4941 transport_class_unregister(&iscsi_connection_class);
4942 transport_class_unregister(&iscsi_session_class);
4943 transport_class_unregister(&iscsi_host_class);
4944 class_unregister(&iscsi_endpoint_class);
4945 class_unregister(&iscsi_iface_class);
4946 class_unregister(&iscsi_transport_class);
4947 }
4948
4949 module_init(iscsi_transport_init);
4950 module_exit(iscsi_transport_exit);
4951
4952 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4953 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4954 "Alex Aizman <itn780@yahoo.com>");
4955 MODULE_DESCRIPTION("iSCSI Transport Interface");
4956 MODULE_LICENSE("GPL");
4957 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4958 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
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