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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_iscsi.c
blobdfc726fa34e34f5206101fdda0a84b2a9c3a7592
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 DEFINE_IDA(iscsi_sess_ida);
93 /*
94 * list of registered transports and lock that must
95 * be held while accessing list. The iscsi_transport_lock must
96 * be acquired after the rx_queue_mutex.
97 */
98 static LIST_HEAD(iscsi_transports);
99 static DEFINE_SPINLOCK(iscsi_transport_lock);
100
101 #define to_iscsi_internal(tmpl) \
102 container_of(tmpl, struct iscsi_internal, t)
103
104 #define dev_to_iscsi_internal(_dev) \
105 container_of(_dev, struct iscsi_internal, dev)
106
107 static void iscsi_transport_release(struct device *dev)
108 {
109 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
110 kfree(priv);
111 }
112
113 /*
114 * iscsi_transport_class represents the iscsi_transports that are
115 * registered.
116 */
117 static struct class iscsi_transport_class = {
118 .name = "iscsi_transport",
119 .dev_release = iscsi_transport_release,
120 };
121
122 static ssize_t
123 show_transport_handle(struct device *dev, struct device_attribute *attr,
124 char *buf)
125 {
126 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
127 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
128 }
129 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
130
131 #define show_transport_attr(name, format) \
132 static ssize_t \
133 show_transport_##name(struct device *dev, \
134 struct device_attribute *attr,char *buf) \
135 { \
136 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
137 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
138 } \
139 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
140
141 show_transport_attr(caps, "0x%x");
142
143 static struct attribute *iscsi_transport_attrs[] = {
144 &dev_attr_handle.attr,
145 &dev_attr_caps.attr,
146 NULL,
147 };
148
149 static struct attribute_group iscsi_transport_group = {
150 .attrs = iscsi_transport_attrs,
151 };
152
153 /*
154 * iSCSI endpoint attrs
155 */
156 #define iscsi_dev_to_endpoint(_dev) \
157 container_of(_dev, struct iscsi_endpoint, dev)
158
159 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
160 struct device_attribute dev_attr_##_prefix##_##_name = \
161 __ATTR(_name,_mode,_show,_store)
162
163 static void iscsi_endpoint_release(struct device *dev)
164 {
165 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
166 kfree(ep);
167 }
168
169 static struct class iscsi_endpoint_class = {
170 .name = "iscsi_endpoint",
171 .dev_release = iscsi_endpoint_release,
172 };
173
174 static ssize_t
175 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
176 {
177 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
178 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
179 }
180 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
181
182 static struct attribute *iscsi_endpoint_attrs[] = {
183 &dev_attr_ep_handle.attr,
184 NULL,
185 };
186
187 static struct attribute_group iscsi_endpoint_group = {
188 .attrs = iscsi_endpoint_attrs,
189 };
190
191 #define ISCSI_MAX_EPID -1
192
193 static int iscsi_match_epid(struct device *dev, const void *data)
194 {
195 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
196 const uint64_t *epid = data;
197
198 return *epid == ep->id;
199 }
200
201 struct iscsi_endpoint *
202 iscsi_create_endpoint(int dd_size)
203 {
204 struct device *dev;
205 struct iscsi_endpoint *ep;
206 uint64_t id;
207 int err;
208
209 for (id = 1; id < ISCSI_MAX_EPID; id++) {
210 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
211 iscsi_match_epid);
212 if (!dev)
213 break;
214 else
215 put_device(dev);
216 }
217 if (id == ISCSI_MAX_EPID) {
218 printk(KERN_ERR "Too many connections. Max supported %u\n",
219 ISCSI_MAX_EPID - 1);
220 return NULL;
221 }
222
223 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
224 if (!ep)
225 return NULL;
226
227 ep->id = id;
228 ep->dev.class = &iscsi_endpoint_class;
229 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
230 err = device_register(&ep->dev);
231 if (err)
232 goto free_ep;
233
234 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
235 if (err)
236 goto unregister_dev;
237
238 if (dd_size)
239 ep->dd_data = &ep[1];
240 return ep;
241
242 unregister_dev:
243 device_unregister(&ep->dev);
244 return NULL;
245
246 free_ep:
247 kfree(ep);
248 return NULL;
249 }
250 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
251
252 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
253 {
254 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
255 device_unregister(&ep->dev);
256 }
257 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
258
259 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
260 {
261 struct iscsi_endpoint *ep;
262 struct device *dev;
263
264 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
265 iscsi_match_epid);
266 if (!dev)
267 return NULL;
268
269 ep = iscsi_dev_to_endpoint(dev);
270 /*
271 * we can drop this now because the interface will prevent
272 * removals and lookups from racing.
273 */
274 put_device(dev);
275 return ep;
276 }
277 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
278
279 /*
280 * Interface to display network param to sysfs
281 */
282
283 static void iscsi_iface_release(struct device *dev)
284 {
285 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
286 struct device *parent = iface->dev.parent;
287
288 kfree(iface);
289 put_device(parent);
290 }
291
292
293 static struct class iscsi_iface_class = {
294 .name = "iscsi_iface",
295 .dev_release = iscsi_iface_release,
296 };
297
298 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
299 struct device_attribute dev_attr_##_prefix##_##_name = \
300 __ATTR(_name, _mode, _show, _store)
301
302 /* iface attrs show */
303 #define iscsi_iface_attr_show(type, name, param_type, param) \
304 static ssize_t \
305 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
306 char *buf) \
307 { \
308 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
309 struct iscsi_transport *t = iface->transport; \
310 return t->get_iface_param(iface, param_type, param, buf); \
311 } \
312
313 #define iscsi_iface_net_attr(type, name, param) \
314 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
315 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
316
317 #define iscsi_iface_attr(type, name, param) \
318 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
319 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
320
321 /* generic read only ipv4 attribute */
322 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
323 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
324 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
325 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
326 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
327 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
328 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
329 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
330 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
331 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
332 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
333 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
334 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
335 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
336 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
337 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
338 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
339 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
340 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
341 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
342 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
343 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
344 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
345 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
346 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
347 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
348 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
349 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
350 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
351
352 /* generic read only ipv6 attribute */
353 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
354 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
355 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
356 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
357 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
358 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
359 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
360 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
361 iscsi_iface_net_attr(ipv6_iface, link_local_state,
362 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
363 iscsi_iface_net_attr(ipv6_iface, router_state,
364 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
365 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
366 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
367 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
368 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
369 iscsi_iface_net_attr(ipv6_iface, traffic_class,
370 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
371 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
372 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
373 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
374 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
375 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
376 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
377 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
378 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
379 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
380 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
381 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
382
383 /* common read only iface attribute */
384 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
385 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
386 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
387 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
388 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
389 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
390 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
391 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
392 iscsi_iface_net_attr(iface, tcp_nagle_disable,
393 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
394 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
395 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
396 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
397 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
398 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
399 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
400
401 /* common iscsi specific settings attributes */
402 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
403 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
404 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
405 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
406 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
407 iscsi_iface_attr(iface, data_seq_in_order,
408 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
409 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
410 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
411 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
412 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
413 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
414 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
415 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
416 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
417 iscsi_iface_attr(iface, discovery_auth_optional,
418 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
419 iscsi_iface_attr(iface, discovery_logout,
420 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
421 iscsi_iface_attr(iface, strict_login_comp_en,
422 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
423 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
424
425 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
426 struct attribute *attr, int i)
427 {
428 struct device *dev = container_of(kobj, struct device, kobj);
429 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
430 struct iscsi_transport *t = iface->transport;
431 int param;
432 int param_type;
433
434 if (attr == &dev_attr_iface_enabled.attr)
435 param = ISCSI_NET_PARAM_IFACE_ENABLE;
436 else if (attr == &dev_attr_iface_vlan_id.attr)
437 param = ISCSI_NET_PARAM_VLAN_ID;
438 else if (attr == &dev_attr_iface_vlan_priority.attr)
439 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
440 else if (attr == &dev_attr_iface_vlan_enabled.attr)
441 param = ISCSI_NET_PARAM_VLAN_ENABLED;
442 else if (attr == &dev_attr_iface_mtu.attr)
443 param = ISCSI_NET_PARAM_MTU;
444 else if (attr == &dev_attr_iface_port.attr)
445 param = ISCSI_NET_PARAM_PORT;
446 else if (attr == &dev_attr_iface_ipaddress_state.attr)
447 param = ISCSI_NET_PARAM_IPADDR_STATE;
448 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
449 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
450 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
451 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
452 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
453 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
454 else if (attr == &dev_attr_iface_tcp_wsf.attr)
455 param = ISCSI_NET_PARAM_TCP_WSF;
456 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
457 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
458 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
459 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
460 else if (attr == &dev_attr_iface_cache_id.attr)
461 param = ISCSI_NET_PARAM_CACHE_ID;
462 else if (attr == &dev_attr_iface_redirect_en.attr)
463 param = ISCSI_NET_PARAM_REDIRECT_EN;
464 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
465 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
466 else if (attr == &dev_attr_iface_header_digest.attr)
467 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
468 else if (attr == &dev_attr_iface_data_digest.attr)
469 param = ISCSI_IFACE_PARAM_DATADGST_EN;
470 else if (attr == &dev_attr_iface_immediate_data.attr)
471 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
472 else if (attr == &dev_attr_iface_initial_r2t.attr)
473 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
474 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
475 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
476 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
477 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
478 else if (attr == &dev_attr_iface_erl.attr)
479 param = ISCSI_IFACE_PARAM_ERL;
480 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
481 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
482 else if (attr == &dev_attr_iface_first_burst_len.attr)
483 param = ISCSI_IFACE_PARAM_FIRST_BURST;
484 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
485 param = ISCSI_IFACE_PARAM_MAX_R2T;
486 else if (attr == &dev_attr_iface_max_burst_len.attr)
487 param = ISCSI_IFACE_PARAM_MAX_BURST;
488 else if (attr == &dev_attr_iface_chap_auth.attr)
489 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
490 else if (attr == &dev_attr_iface_bidi_chap.attr)
491 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
492 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
493 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
494 else if (attr == &dev_attr_iface_discovery_logout.attr)
495 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
496 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
497 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
498 else if (attr == &dev_attr_iface_initiator_name.attr)
499 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
500 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
501 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
502 param = ISCSI_NET_PARAM_IPV4_ADDR;
503 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
504 param = ISCSI_NET_PARAM_IPV4_GW;
505 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
506 param = ISCSI_NET_PARAM_IPV4_SUBNET;
507 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
508 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
509 else if (attr ==
510 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
511 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
512 else if (attr ==
513 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
514 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
515 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
516 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
517 else if (attr == &dev_attr_ipv4_iface_tos.attr)
518 param = ISCSI_NET_PARAM_IPV4_TOS;
519 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
520 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
521 else if (attr ==
522 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
523 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
524 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
525 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
526 else if (attr ==
527 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
528 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
529 else if (attr ==
530 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
531 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
532 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
533 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
534 else if (attr ==
535 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
536 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
537 else if (attr ==
538 &dev_attr_ipv4_iface_fragment_disable.attr)
539 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
540 else if (attr ==
541 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
542 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
543 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
544 param = ISCSI_NET_PARAM_IPV4_TTL;
545 else
546 return 0;
547 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
548 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
549 param = ISCSI_NET_PARAM_IPV6_ADDR;
550 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
551 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
552 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
553 param = ISCSI_NET_PARAM_IPV6_ROUTER;
554 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
555 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
556 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
557 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
558 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
559 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
560 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
561 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
562 else if (attr ==
563 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
564 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
565 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
566 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
567 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
568 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
569 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
570 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
571 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
572 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
573 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
574 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
575 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
576 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
577 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
578 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
579 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
580 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
581 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
582 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
583 else
584 return 0;
585 } else {
586 WARN_ONCE(1, "Invalid iface attr");
587 return 0;
588 }
589
590 switch (param) {
591 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
592 case ISCSI_IFACE_PARAM_HDRDGST_EN:
593 case ISCSI_IFACE_PARAM_DATADGST_EN:
594 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
595 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
596 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
597 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
598 case ISCSI_IFACE_PARAM_ERL:
599 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
600 case ISCSI_IFACE_PARAM_FIRST_BURST:
601 case ISCSI_IFACE_PARAM_MAX_R2T:
602 case ISCSI_IFACE_PARAM_MAX_BURST:
603 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
604 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
605 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
606 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
607 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
608 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
609 param_type = ISCSI_IFACE_PARAM;
610 break;
611 default:
612 param_type = ISCSI_NET_PARAM;
613 }
614
615 return t->attr_is_visible(param_type, param);
616 }
617
618 static struct attribute *iscsi_iface_attrs[] = {
619 &dev_attr_iface_enabled.attr,
620 &dev_attr_iface_vlan_id.attr,
621 &dev_attr_iface_vlan_priority.attr,
622 &dev_attr_iface_vlan_enabled.attr,
623 &dev_attr_ipv4_iface_ipaddress.attr,
624 &dev_attr_ipv4_iface_gateway.attr,
625 &dev_attr_ipv4_iface_subnet.attr,
626 &dev_attr_ipv4_iface_bootproto.attr,
627 &dev_attr_ipv6_iface_ipaddress.attr,
628 &dev_attr_ipv6_iface_link_local_addr.attr,
629 &dev_attr_ipv6_iface_router_addr.attr,
630 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
631 &dev_attr_ipv6_iface_link_local_autocfg.attr,
632 &dev_attr_iface_mtu.attr,
633 &dev_attr_iface_port.attr,
634 &dev_attr_iface_ipaddress_state.attr,
635 &dev_attr_iface_delayed_ack_en.attr,
636 &dev_attr_iface_tcp_nagle_disable.attr,
637 &dev_attr_iface_tcp_wsf_disable.attr,
638 &dev_attr_iface_tcp_wsf.attr,
639 &dev_attr_iface_tcp_timer_scale.attr,
640 &dev_attr_iface_tcp_timestamp_en.attr,
641 &dev_attr_iface_cache_id.attr,
642 &dev_attr_iface_redirect_en.attr,
643 &dev_attr_iface_def_taskmgmt_tmo.attr,
644 &dev_attr_iface_header_digest.attr,
645 &dev_attr_iface_data_digest.attr,
646 &dev_attr_iface_immediate_data.attr,
647 &dev_attr_iface_initial_r2t.attr,
648 &dev_attr_iface_data_seq_in_order.attr,
649 &dev_attr_iface_data_pdu_in_order.attr,
650 &dev_attr_iface_erl.attr,
651 &dev_attr_iface_max_recv_dlength.attr,
652 &dev_attr_iface_first_burst_len.attr,
653 &dev_attr_iface_max_outstanding_r2t.attr,
654 &dev_attr_iface_max_burst_len.attr,
655 &dev_attr_iface_chap_auth.attr,
656 &dev_attr_iface_bidi_chap.attr,
657 &dev_attr_iface_discovery_auth_optional.attr,
658 &dev_attr_iface_discovery_logout.attr,
659 &dev_attr_iface_strict_login_comp_en.attr,
660 &dev_attr_iface_initiator_name.attr,
661 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
662 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
663 &dev_attr_ipv4_iface_tos_en.attr,
664 &dev_attr_ipv4_iface_tos.attr,
665 &dev_attr_ipv4_iface_grat_arp_en.attr,
666 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
667 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
668 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
669 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
670 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
671 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
672 &dev_attr_ipv4_iface_fragment_disable.attr,
673 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
674 &dev_attr_ipv4_iface_ttl.attr,
675 &dev_attr_ipv6_iface_link_local_state.attr,
676 &dev_attr_ipv6_iface_router_state.attr,
677 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
678 &dev_attr_ipv6_iface_mld_en.attr,
679 &dev_attr_ipv6_iface_flow_label.attr,
680 &dev_attr_ipv6_iface_traffic_class.attr,
681 &dev_attr_ipv6_iface_hop_limit.attr,
682 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
683 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
684 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
685 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
686 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
687 NULL,
688 };
689
690 static struct attribute_group iscsi_iface_group = {
691 .attrs = iscsi_iface_attrs,
692 .is_visible = iscsi_iface_attr_is_visible,
693 };
694
695 /* convert iscsi_ipaddress_state values to ascii string name */
696 static const struct {
697 enum iscsi_ipaddress_state value;
698 char *name;
699 } iscsi_ipaddress_state_names[] = {
700 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
701 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
702 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
703 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
704 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
705 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
706 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
707 };
708
709 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
710 {
711 int i;
712 char *state = NULL;
713
714 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
715 if (iscsi_ipaddress_state_names[i].value == port_state) {
716 state = iscsi_ipaddress_state_names[i].name;
717 break;
718 }
719 }
720 return state;
721 }
722 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
723
724 /* convert iscsi_router_state values to ascii string name */
725 static const struct {
726 enum iscsi_router_state value;
727 char *name;
728 } iscsi_router_state_names[] = {
729 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
730 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
731 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
732 {ISCSI_ROUTER_STATE_STALE, "Stale" },
733 };
734
735 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
736 {
737 int i;
738 char *state = NULL;
739
740 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
741 if (iscsi_router_state_names[i].value == router_state) {
742 state = iscsi_router_state_names[i].name;
743 break;
744 }
745 }
746 return state;
747 }
748 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
749
750 struct iscsi_iface *
751 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
752 uint32_t iface_type, uint32_t iface_num, int dd_size)
753 {
754 struct iscsi_iface *iface;
755 int err;
756
757 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
758 if (!iface)
759 return NULL;
760
761 iface->transport = transport;
762 iface->iface_type = iface_type;
763 iface->iface_num = iface_num;
764 iface->dev.release = iscsi_iface_release;
765 iface->dev.class = &iscsi_iface_class;
766 /* parent reference released in iscsi_iface_release */
767 iface->dev.parent = get_device(&shost->shost_gendev);
768 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
769 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
770 iface_num);
771 else
772 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
773 iface_num);
774
775 err = device_register(&iface->dev);
776 if (err)
777 goto free_iface;
778
779 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
780 if (err)
781 goto unreg_iface;
782
783 if (dd_size)
784 iface->dd_data = &iface[1];
785 return iface;
786
787 unreg_iface:
788 device_unregister(&iface->dev);
789 return NULL;
790
791 free_iface:
792 put_device(iface->dev.parent);
793 kfree(iface);
794 return NULL;
795 }
796 EXPORT_SYMBOL_GPL(iscsi_create_iface);
797
798 void iscsi_destroy_iface(struct iscsi_iface *iface)
799 {
800 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
801 device_unregister(&iface->dev);
802 }
803 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
804
805 /*
806 * Interface to display flash node params to sysfs
807 */
808
809 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
810 struct device_attribute dev_attr_##_prefix##_##_name = \
811 __ATTR(_name, _mode, _show, _store)
812
813 /* flash node session attrs show */
814 #define iscsi_flashnode_sess_attr_show(type, name, param) \
815 static ssize_t \
816 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
817 char *buf) \
818 { \
819 struct iscsi_bus_flash_session *fnode_sess = \
820 iscsi_dev_to_flash_session(dev);\
821 struct iscsi_transport *t = fnode_sess->transport; \
822 return t->get_flashnode_param(fnode_sess, param, buf); \
823 } \
824
825
826 #define iscsi_flashnode_sess_attr(type, name, param) \
827 iscsi_flashnode_sess_attr_show(type, name, param) \
828 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
829 show_##type##_##name, NULL);
830
831 /* Flash node session attributes */
832
833 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
834 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
835 iscsi_flashnode_sess_attr(fnode, discovery_session,
836 ISCSI_FLASHNODE_DISCOVERY_SESS);
837 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
838 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
839 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
840 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
841 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
842 ISCSI_FLASHNODE_DATASEQ_INORDER);
843 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
844 ISCSI_FLASHNODE_PDU_INORDER);
845 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
846 iscsi_flashnode_sess_attr(fnode, discovery_logout,
847 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
848 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
849 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
850 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
851 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
852 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
853 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
854 iscsi_flashnode_sess_attr(fnode, def_time2retain,
855 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
856 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
857 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
858 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
859 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
860 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
861 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
862 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
863 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
864 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
865 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
866 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
867 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
868 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
869 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
870 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
871 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
872 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
873 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
874 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
875 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
876
877 static struct attribute *iscsi_flashnode_sess_attrs[] = {
878 &dev_attr_fnode_auto_snd_tgt_disable.attr,
879 &dev_attr_fnode_discovery_session.attr,
880 &dev_attr_fnode_portal_type.attr,
881 &dev_attr_fnode_entry_enable.attr,
882 &dev_attr_fnode_immediate_data.attr,
883 &dev_attr_fnode_initial_r2t.attr,
884 &dev_attr_fnode_data_seq_in_order.attr,
885 &dev_attr_fnode_data_pdu_in_order.attr,
886 &dev_attr_fnode_chap_auth.attr,
887 &dev_attr_fnode_discovery_logout.attr,
888 &dev_attr_fnode_bidi_chap.attr,
889 &dev_attr_fnode_discovery_auth_optional.attr,
890 &dev_attr_fnode_erl.attr,
891 &dev_attr_fnode_first_burst_len.attr,
892 &dev_attr_fnode_def_time2wait.attr,
893 &dev_attr_fnode_def_time2retain.attr,
894 &dev_attr_fnode_max_outstanding_r2t.attr,
895 &dev_attr_fnode_isid.attr,
896 &dev_attr_fnode_tsid.attr,
897 &dev_attr_fnode_max_burst_len.attr,
898 &dev_attr_fnode_def_taskmgmt_tmo.attr,
899 &dev_attr_fnode_targetalias.attr,
900 &dev_attr_fnode_targetname.attr,
901 &dev_attr_fnode_tpgt.attr,
902 &dev_attr_fnode_discovery_parent_idx.attr,
903 &dev_attr_fnode_discovery_parent_type.attr,
904 &dev_attr_fnode_chap_in_idx.attr,
905 &dev_attr_fnode_chap_out_idx.attr,
906 &dev_attr_fnode_username.attr,
907 &dev_attr_fnode_username_in.attr,
908 &dev_attr_fnode_password.attr,
909 &dev_attr_fnode_password_in.attr,
910 &dev_attr_fnode_is_boot_target.attr,
911 NULL,
912 };
913
914 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
915 struct attribute *attr,
916 int i)
917 {
918 struct device *dev = container_of(kobj, struct device, kobj);
919 struct iscsi_bus_flash_session *fnode_sess =
920 iscsi_dev_to_flash_session(dev);
921 struct iscsi_transport *t = fnode_sess->transport;
922 int param;
923
924 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
925 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
926 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
927 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
928 } else if (attr == &dev_attr_fnode_portal_type.attr) {
929 param = ISCSI_FLASHNODE_PORTAL_TYPE;
930 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
931 param = ISCSI_FLASHNODE_ENTRY_EN;
932 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
933 param = ISCSI_FLASHNODE_IMM_DATA_EN;
934 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
935 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
936 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
937 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
938 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
939 param = ISCSI_FLASHNODE_PDU_INORDER;
940 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
941 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
942 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
943 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
944 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
945 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
946 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
947 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
948 } else if (attr == &dev_attr_fnode_erl.attr) {
949 param = ISCSI_FLASHNODE_ERL;
950 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
951 param = ISCSI_FLASHNODE_FIRST_BURST;
952 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
953 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
954 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
955 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
956 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
957 param = ISCSI_FLASHNODE_MAX_R2T;
958 } else if (attr == &dev_attr_fnode_isid.attr) {
959 param = ISCSI_FLASHNODE_ISID;
960 } else if (attr == &dev_attr_fnode_tsid.attr) {
961 param = ISCSI_FLASHNODE_TSID;
962 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
963 param = ISCSI_FLASHNODE_MAX_BURST;
964 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
965 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
966 } else if (attr == &dev_attr_fnode_targetalias.attr) {
967 param = ISCSI_FLASHNODE_ALIAS;
968 } else if (attr == &dev_attr_fnode_targetname.attr) {
969 param = ISCSI_FLASHNODE_NAME;
970 } else if (attr == &dev_attr_fnode_tpgt.attr) {
971 param = ISCSI_FLASHNODE_TPGT;
972 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
973 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
974 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
975 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
976 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
977 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
978 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
979 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
980 } else if (attr == &dev_attr_fnode_username.attr) {
981 param = ISCSI_FLASHNODE_USERNAME;
982 } else if (attr == &dev_attr_fnode_username_in.attr) {
983 param = ISCSI_FLASHNODE_USERNAME_IN;
984 } else if (attr == &dev_attr_fnode_password.attr) {
985 param = ISCSI_FLASHNODE_PASSWORD;
986 } else if (attr == &dev_attr_fnode_password_in.attr) {
987 param = ISCSI_FLASHNODE_PASSWORD_IN;
988 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
989 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
990 } else {
991 WARN_ONCE(1, "Invalid flashnode session attr");
992 return 0;
993 }
994
995 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
996 }
997
998 static struct attribute_group iscsi_flashnode_sess_attr_group = {
999 .attrs = iscsi_flashnode_sess_attrs,
1000 .is_visible = iscsi_flashnode_sess_attr_is_visible,
1001 };
1002
1003 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1004 &iscsi_flashnode_sess_attr_group,
1005 NULL,
1006 };
1007
1008 static void iscsi_flashnode_sess_release(struct device *dev)
1009 {
1010 struct iscsi_bus_flash_session *fnode_sess =
1011 iscsi_dev_to_flash_session(dev);
1012
1013 kfree(fnode_sess->targetname);
1014 kfree(fnode_sess->targetalias);
1015 kfree(fnode_sess->portal_type);
1016 kfree(fnode_sess);
1017 }
1018
1019 static const struct device_type iscsi_flashnode_sess_dev_type = {
1020 .name = "iscsi_flashnode_sess_dev_type",
1021 .groups = iscsi_flashnode_sess_attr_groups,
1022 .release = iscsi_flashnode_sess_release,
1023 };
1024
1025 /* flash node connection attrs show */
1026 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1027 static ssize_t \
1028 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1029 char *buf) \
1030 { \
1031 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1032 struct iscsi_bus_flash_session *fnode_sess = \
1033 iscsi_flash_conn_to_flash_session(fnode_conn);\
1034 struct iscsi_transport *t = fnode_conn->transport; \
1035 return t->get_flashnode_param(fnode_sess, param, buf); \
1036 } \
1037
1038
1039 #define iscsi_flashnode_conn_attr(type, name, param) \
1040 iscsi_flashnode_conn_attr_show(type, name, param) \
1041 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1042 show_##type##_##name, NULL);
1043
1044 /* Flash node connection attributes */
1045
1046 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1047 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1048 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1049 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1050 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1051 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1052 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1053 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1054 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1055 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1056 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1057 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1058 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1059 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1060 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1061 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1062 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1063 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1064 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1065 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1066 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1067 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1068 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1069 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1070 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1071 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1072 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1073 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1074 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1075 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1076 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1077 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1078 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1079 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1080 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1081 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1082 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1083 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1084 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1085
1086 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1087 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1088 &dev_attr_fnode_header_digest.attr,
1089 &dev_attr_fnode_data_digest.attr,
1090 &dev_attr_fnode_snack_req.attr,
1091 &dev_attr_fnode_tcp_timestamp_stat.attr,
1092 &dev_attr_fnode_tcp_nagle_disable.attr,
1093 &dev_attr_fnode_tcp_wsf_disable.attr,
1094 &dev_attr_fnode_tcp_timer_scale.attr,
1095 &dev_attr_fnode_tcp_timestamp_enable.attr,
1096 &dev_attr_fnode_fragment_disable.attr,
1097 &dev_attr_fnode_max_recv_dlength.attr,
1098 &dev_attr_fnode_max_xmit_dlength.attr,
1099 &dev_attr_fnode_keepalive_tmo.attr,
1100 &dev_attr_fnode_port.attr,
1101 &dev_attr_fnode_ipaddress.attr,
1102 &dev_attr_fnode_redirect_ipaddr.attr,
1103 &dev_attr_fnode_max_segment_size.attr,
1104 &dev_attr_fnode_local_port.attr,
1105 &dev_attr_fnode_ipv4_tos.attr,
1106 &dev_attr_fnode_ipv6_traffic_class.attr,
1107 &dev_attr_fnode_ipv6_flow_label.attr,
1108 &dev_attr_fnode_link_local_ipv6.attr,
1109 &dev_attr_fnode_tcp_xmit_wsf.attr,
1110 &dev_attr_fnode_tcp_recv_wsf.attr,
1111 &dev_attr_fnode_statsn.attr,
1112 &dev_attr_fnode_exp_statsn.attr,
1113 NULL,
1114 };
1115
1116 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1117 struct attribute *attr,
1118 int i)
1119 {
1120 struct device *dev = container_of(kobj, struct device, kobj);
1121 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1122 struct iscsi_transport *t = fnode_conn->transport;
1123 int param;
1124
1125 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1126 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1127 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1128 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1129 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1130 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1131 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1132 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1133 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1134 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1135 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1136 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1137 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1138 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1139 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1140 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1141 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1142 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1143 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1144 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1145 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1146 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1147 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1148 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1149 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1150 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1151 } else if (attr == &dev_attr_fnode_port.attr) {
1152 param = ISCSI_FLASHNODE_PORT;
1153 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1154 param = ISCSI_FLASHNODE_IPADDR;
1155 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1156 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1157 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1158 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1159 } else if (attr == &dev_attr_fnode_local_port.attr) {
1160 param = ISCSI_FLASHNODE_LOCAL_PORT;
1161 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1162 param = ISCSI_FLASHNODE_IPV4_TOS;
1163 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1164 param = ISCSI_FLASHNODE_IPV6_TC;
1165 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1166 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1167 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1168 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1169 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1170 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1171 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1172 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1173 } else if (attr == &dev_attr_fnode_statsn.attr) {
1174 param = ISCSI_FLASHNODE_STATSN;
1175 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1176 param = ISCSI_FLASHNODE_EXP_STATSN;
1177 } else {
1178 WARN_ONCE(1, "Invalid flashnode connection attr");
1179 return 0;
1180 }
1181
1182 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1183 }
1184
1185 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1186 .attrs = iscsi_flashnode_conn_attrs,
1187 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1188 };
1189
1190 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1191 &iscsi_flashnode_conn_attr_group,
1192 NULL,
1193 };
1194
1195 static void iscsi_flashnode_conn_release(struct device *dev)
1196 {
1197 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1198
1199 kfree(fnode_conn->ipaddress);
1200 kfree(fnode_conn->redirect_ipaddr);
1201 kfree(fnode_conn->link_local_ipv6_addr);
1202 kfree(fnode_conn);
1203 }
1204
1205 static const struct device_type iscsi_flashnode_conn_dev_type = {
1206 .name = "iscsi_flashnode_conn_dev_type",
1207 .groups = iscsi_flashnode_conn_attr_groups,
1208 .release = iscsi_flashnode_conn_release,
1209 };
1210
1211 static struct bus_type iscsi_flashnode_bus;
1212
1213 int iscsi_flashnode_bus_match(struct device *dev,
1214 struct device_driver *drv)
1215 {
1216 if (dev->bus == &iscsi_flashnode_bus)
1217 return 1;
1218 return 0;
1219 }
1220 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1221
1222 static struct bus_type iscsi_flashnode_bus = {
1223 .name = "iscsi_flashnode",
1224 .match = &iscsi_flashnode_bus_match,
1225 };
1226
1227 /**
1228 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1229 * @shost: pointer to host data
1230 * @index: index of flashnode to add in sysfs
1231 * @transport: pointer to transport data
1232 * @dd_size: total size to allocate
1233 *
1234 * Adds a sysfs entry for the flashnode session attributes
1235 *
1236 * Returns:
1237 * pointer to allocated flashnode sess on success
1238 * %NULL on failure
1239 */
1240 struct iscsi_bus_flash_session *
1241 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1242 struct iscsi_transport *transport,
1243 int dd_size)
1244 {
1245 struct iscsi_bus_flash_session *fnode_sess;
1246 int err;
1247
1248 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1249 if (!fnode_sess)
1250 return NULL;
1251
1252 fnode_sess->transport = transport;
1253 fnode_sess->target_id = index;
1254 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1255 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1256 fnode_sess->dev.parent = &shost->shost_gendev;
1257 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1258 shost->host_no, index);
1259
1260 err = device_register(&fnode_sess->dev);
1261 if (err)
1262 goto free_fnode_sess;
1263
1264 if (dd_size)
1265 fnode_sess->dd_data = &fnode_sess[1];
1266
1267 return fnode_sess;
1268
1269 free_fnode_sess:
1270 kfree(fnode_sess);
1271 return NULL;
1272 }
1273 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1274
1275 /**
1276 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1277 * @shost: pointer to host data
1278 * @fnode_sess: pointer to the parent flashnode session entry
1279 * @transport: pointer to transport data
1280 * @dd_size: total size to allocate
1281 *
1282 * Adds a sysfs entry for the flashnode connection attributes
1283 *
1284 * Returns:
1285 * pointer to allocated flashnode conn on success
1286 * %NULL on failure
1287 */
1288 struct iscsi_bus_flash_conn *
1289 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1290 struct iscsi_bus_flash_session *fnode_sess,
1291 struct iscsi_transport *transport,
1292 int dd_size)
1293 {
1294 struct iscsi_bus_flash_conn *fnode_conn;
1295 int err;
1296
1297 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1298 if (!fnode_conn)
1299 return NULL;
1300
1301 fnode_conn->transport = transport;
1302 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1303 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1304 fnode_conn->dev.parent = &fnode_sess->dev;
1305 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1306 shost->host_no, fnode_sess->target_id);
1307
1308 err = device_register(&fnode_conn->dev);
1309 if (err)
1310 goto free_fnode_conn;
1311
1312 if (dd_size)
1313 fnode_conn->dd_data = &fnode_conn[1];
1314
1315 return fnode_conn;
1316
1317 free_fnode_conn:
1318 kfree(fnode_conn);
1319 return NULL;
1320 }
1321 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1322
1323 /**
1324 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1325 * @dev: device to verify
1326 * @data: pointer to data containing value to use for verification
1327 *
1328 * Verifies if the passed device is flashnode conn device
1329 *
1330 * Returns:
1331 * 1 on success
1332 * 0 on failure
1333 */
1334 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1335 {
1336 return dev->bus == &iscsi_flashnode_bus;
1337 }
1338
1339 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1340 {
1341 device_unregister(&fnode_conn->dev);
1342 return 0;
1343 }
1344
1345 static int flashnode_match_index(struct device *dev, void *data)
1346 {
1347 struct iscsi_bus_flash_session *fnode_sess = NULL;
1348 int ret = 0;
1349
1350 if (!iscsi_flashnode_bus_match(dev, NULL))
1351 goto exit_match_index;
1352
1353 fnode_sess = iscsi_dev_to_flash_session(dev);
1354 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1355
1356 exit_match_index:
1357 return ret;
1358 }
1359
1360 /**
1361 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1362 * @shost: pointer to host data
1363 * @idx: index to match
1364 *
1365 * Finds the flashnode session object for the passed index
1366 *
1367 * Returns:
1368 * pointer to found flashnode session object on success
1369 * %NULL on failure
1370 */
1371 static struct iscsi_bus_flash_session *
1372 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1373 {
1374 struct iscsi_bus_flash_session *fnode_sess = NULL;
1375 struct device *dev;
1376
1377 dev = device_find_child(&shost->shost_gendev, &idx,
1378 flashnode_match_index);
1379 if (dev)
1380 fnode_sess = iscsi_dev_to_flash_session(dev);
1381
1382 return fnode_sess;
1383 }
1384
1385 /**
1386 * iscsi_find_flashnode_sess - finds flashnode session entry
1387 * @shost: pointer to host data
1388 * @data: pointer to data containing value to use for comparison
1389 * @fn: function pointer that does actual comparison
1390 *
1391 * Finds the flashnode session object comparing the data passed using logic
1392 * defined in passed function pointer
1393 *
1394 * Returns:
1395 * pointer to found flashnode session device object on success
1396 * %NULL on failure
1397 */
1398 struct device *
1399 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1400 int (*fn)(struct device *dev, void *data))
1401 {
1402 return device_find_child(&shost->shost_gendev, data, fn);
1403 }
1404 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1405
1406 /**
1407 * iscsi_find_flashnode_conn - finds flashnode connection entry
1408 * @fnode_sess: pointer to parent flashnode session entry
1409 *
1410 * Finds the flashnode connection object comparing the data passed using logic
1411 * defined in passed function pointer
1412 *
1413 * Returns:
1414 * pointer to found flashnode connection device object on success
1415 * %NULL on failure
1416 */
1417 struct device *
1418 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1419 {
1420 return device_find_child(&fnode_sess->dev, NULL,
1421 iscsi_is_flashnode_conn_dev);
1422 }
1423 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1424
1425 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1426 {
1427 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1428 return 0;
1429
1430 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1431 }
1432
1433 /**
1434 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1435 * @fnode_sess: pointer to flashnode session entry to be destroyed
1436 *
1437 * Deletes the flashnode session entry and all children flashnode connection
1438 * entries from sysfs
1439 */
1440 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1441 {
1442 int err;
1443
1444 err = device_for_each_child(&fnode_sess->dev, NULL,
1445 iscsi_iter_destroy_flashnode_conn_fn);
1446 if (err)
1447 pr_err("Could not delete all connections for %s. Error %d.\n",
1448 fnode_sess->dev.kobj.name, err);
1449
1450 device_unregister(&fnode_sess->dev);
1451 }
1452 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1453
1454 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1455 {
1456 if (!iscsi_flashnode_bus_match(dev, NULL))
1457 return 0;
1458
1459 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1460 return 0;
1461 }
1462
1463 /**
1464 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1465 * @shost: pointer to host data
1466 *
1467 * Destroys all the flashnode session entries and all corresponding children
1468 * flashnode connection entries from sysfs
1469 */
1470 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1471 {
1472 device_for_each_child(&shost->shost_gendev, NULL,
1473 iscsi_iter_destroy_flashnode_fn);
1474 }
1475 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1476
1477 /*
1478 * BSG support
1479 */
1480 /**
1481 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1482 * @job: bsg job to be processed
1483 */
1484 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1485 {
1486 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1487 struct iscsi_bsg_request *req = job->request;
1488 struct iscsi_bsg_reply *reply = job->reply;
1489 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1490 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1491 int ret;
1492
1493 /* check if we have the msgcode value at least */
1494 if (job->request_len < sizeof(uint32_t)) {
1495 ret = -ENOMSG;
1496 goto fail_host_msg;
1497 }
1498
1499 /* Validate the host command */
1500 switch (req->msgcode) {
1501 case ISCSI_BSG_HST_VENDOR:
1502 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1503 if ((shost->hostt->vendor_id == 0L) ||
1504 (req->rqst_data.h_vendor.vendor_id !=
1505 shost->hostt->vendor_id)) {
1506 ret = -ESRCH;
1507 goto fail_host_msg;
1508 }
1509 break;
1510 default:
1511 ret = -EBADR;
1512 goto fail_host_msg;
1513 }
1514
1515 /* check if we really have all the request data needed */
1516 if (job->request_len < cmdlen) {
1517 ret = -ENOMSG;
1518 goto fail_host_msg;
1519 }
1520
1521 ret = i->iscsi_transport->bsg_request(job);
1522 if (!ret)
1523 return 0;
1524
1525 fail_host_msg:
1526 /* return the errno failure code as the only status */
1527 BUG_ON(job->reply_len < sizeof(uint32_t));
1528 reply->reply_payload_rcv_len = 0;
1529 reply->result = ret;
1530 job->reply_len = sizeof(uint32_t);
1531 bsg_job_done(job, ret, 0);
1532 return 0;
1533 }
1534
1535 /**
1536 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1537 * @shost: shost for iscsi_host
1538 * @ihost: iscsi_cls_host adding the structures to
1539 */
1540 static int
1541 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1542 {
1543 struct device *dev = &shost->shost_gendev;
1544 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1545 struct request_queue *q;
1546 char bsg_name[20];
1547
1548 if (!i->iscsi_transport->bsg_request)
1549 return -ENOTSUPP;
1550
1551 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1552 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1553 if (IS_ERR(q)) {
1554 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1555 "initialize - no request queue\n");
1556 return PTR_ERR(q);
1557 }
1558 __scsi_init_queue(shost, q);
1559
1560 ihost->bsg_q = q;
1561 return 0;
1562 }
1563
1564 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1565 struct device *cdev)
1566 {
1567 struct Scsi_Host *shost = dev_to_shost(dev);
1568 struct iscsi_cls_host *ihost = shost->shost_data;
1569
1570 memset(ihost, 0, sizeof(*ihost));
1571 atomic_set(&ihost->nr_scans, 0);
1572 mutex_init(&ihost->mutex);
1573
1574 iscsi_bsg_host_add(shost, ihost);
1575 /* ignore any bsg add error - we just can't do sgio */
1576
1577 return 0;
1578 }
1579
1580 static int iscsi_remove_host(struct transport_container *tc,
1581 struct device *dev, struct device *cdev)
1582 {
1583 struct Scsi_Host *shost = dev_to_shost(dev);
1584 struct iscsi_cls_host *ihost = shost->shost_data;
1585
1586 bsg_remove_queue(ihost->bsg_q);
1587 return 0;
1588 }
1589
1590 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1591 "iscsi_host",
1592 iscsi_setup_host,
1593 iscsi_remove_host,
1594 NULL);
1595
1596 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1597 "iscsi_session",
1598 NULL,
1599 NULL,
1600 NULL);
1601
1602 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1603 "iscsi_connection",
1604 NULL,
1605 NULL,
1606 NULL);
1607
1608 static struct sock *nls;
1609 static DEFINE_MUTEX(rx_queue_mutex);
1610
1611 static LIST_HEAD(sesslist);
1612 static DEFINE_SPINLOCK(sesslock);
1613 static LIST_HEAD(connlist);
1614 static DEFINE_SPINLOCK(connlock);
1615
1616 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1617 {
1618 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1619 return sess->sid;
1620 }
1621
1622 /*
1623 * Returns the matching session to a given sid
1624 */
1625 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1626 {
1627 unsigned long flags;
1628 struct iscsi_cls_session *sess;
1629
1630 spin_lock_irqsave(&sesslock, flags);
1631 list_for_each_entry(sess, &sesslist, sess_list) {
1632 if (sess->sid == sid) {
1633 spin_unlock_irqrestore(&sesslock, flags);
1634 return sess;
1635 }
1636 }
1637 spin_unlock_irqrestore(&sesslock, flags);
1638 return NULL;
1639 }
1640
1641 /*
1642 * Returns the matching connection to a given sid / cid tuple
1643 */
1644 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1645 {
1646 unsigned long flags;
1647 struct iscsi_cls_conn *conn;
1648
1649 spin_lock_irqsave(&connlock, flags);
1650 list_for_each_entry(conn, &connlist, conn_list) {
1651 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1652 spin_unlock_irqrestore(&connlock, flags);
1653 return conn;
1654 }
1655 }
1656 spin_unlock_irqrestore(&connlock, flags);
1657 return NULL;
1658 }
1659
1660 /*
1661 * The following functions can be used by LLDs that allocate
1662 * their own scsi_hosts or by software iscsi LLDs
1663 */
1664 static struct {
1665 int value;
1666 char *name;
1667 } iscsi_session_state_names[] = {
1668 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1669 { ISCSI_SESSION_FAILED, "FAILED" },
1670 { ISCSI_SESSION_FREE, "FREE" },
1671 };
1672
1673 static const char *iscsi_session_state_name(int state)
1674 {
1675 int i;
1676 char *name = NULL;
1677
1678 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1679 if (iscsi_session_state_names[i].value == state) {
1680 name = iscsi_session_state_names[i].name;
1681 break;
1682 }
1683 }
1684 return name;
1685 }
1686
1687 int iscsi_session_chkready(struct iscsi_cls_session *session)
1688 {
1689 unsigned long flags;
1690 int err;
1691
1692 spin_lock_irqsave(&session->lock, flags);
1693 switch (session->state) {
1694 case ISCSI_SESSION_LOGGED_IN:
1695 err = 0;
1696 break;
1697 case ISCSI_SESSION_FAILED:
1698 err = DID_IMM_RETRY << 16;
1699 break;
1700 case ISCSI_SESSION_FREE:
1701 err = DID_TRANSPORT_FAILFAST << 16;
1702 break;
1703 default:
1704 err = DID_NO_CONNECT << 16;
1705 break;
1706 }
1707 spin_unlock_irqrestore(&session->lock, flags);
1708 return err;
1709 }
1710 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1711
1712 int iscsi_is_session_online(struct iscsi_cls_session *session)
1713 {
1714 unsigned long flags;
1715 int ret = 0;
1716
1717 spin_lock_irqsave(&session->lock, flags);
1718 if (session->state == ISCSI_SESSION_LOGGED_IN)
1719 ret = 1;
1720 spin_unlock_irqrestore(&session->lock, flags);
1721 return ret;
1722 }
1723 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1724
1725 static void iscsi_session_release(struct device *dev)
1726 {
1727 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1728 struct Scsi_Host *shost;
1729
1730 shost = iscsi_session_to_shost(session);
1731 scsi_host_put(shost);
1732 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1733 kfree(session);
1734 }
1735
1736 int iscsi_is_session_dev(const struct device *dev)
1737 {
1738 return dev->release == iscsi_session_release;
1739 }
1740 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1741
1742 static int iscsi_iter_session_fn(struct device *dev, void *data)
1743 {
1744 void (* fn) (struct iscsi_cls_session *) = data;
1745
1746 if (!iscsi_is_session_dev(dev))
1747 return 0;
1748 fn(iscsi_dev_to_session(dev));
1749 return 0;
1750 }
1751
1752 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1753 void (*fn)(struct iscsi_cls_session *))
1754 {
1755 device_for_each_child(&shost->shost_gendev, fn,
1756 iscsi_iter_session_fn);
1757 }
1758 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1759
1760 /**
1761 * iscsi_scan_finished - helper to report when running scans are done
1762 * @shost: scsi host
1763 * @time: scan run time
1764 *
1765 * This function can be used by drives like qla4xxx to report to the scsi
1766 * layer when the scans it kicked off at module load time are done.
1767 */
1768 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1769 {
1770 struct iscsi_cls_host *ihost = shost->shost_data;
1771 /*
1772 * qla4xxx will have kicked off some session unblocks before calling
1773 * scsi_scan_host, so just wait for them to complete.
1774 */
1775 return !atomic_read(&ihost->nr_scans);
1776 }
1777 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1778
1779 struct iscsi_scan_data {
1780 unsigned int channel;
1781 unsigned int id;
1782 u64 lun;
1783 enum scsi_scan_mode rescan;
1784 };
1785
1786 static int iscsi_user_scan_session(struct device *dev, void *data)
1787 {
1788 struct iscsi_scan_data *scan_data = data;
1789 struct iscsi_cls_session *session;
1790 struct Scsi_Host *shost;
1791 struct iscsi_cls_host *ihost;
1792 unsigned long flags;
1793 unsigned int id;
1794
1795 if (!iscsi_is_session_dev(dev))
1796 return 0;
1797
1798 session = iscsi_dev_to_session(dev);
1799
1800 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1801
1802 shost = iscsi_session_to_shost(session);
1803 ihost = shost->shost_data;
1804
1805 mutex_lock(&ihost->mutex);
1806 spin_lock_irqsave(&session->lock, flags);
1807 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1808 spin_unlock_irqrestore(&session->lock, flags);
1809 goto user_scan_exit;
1810 }
1811 id = session->target_id;
1812 spin_unlock_irqrestore(&session->lock, flags);
1813
1814 if (id != ISCSI_MAX_TARGET) {
1815 if ((scan_data->channel == SCAN_WILD_CARD ||
1816 scan_data->channel == 0) &&
1817 (scan_data->id == SCAN_WILD_CARD ||
1818 scan_data->id == id))
1819 scsi_scan_target(&session->dev, 0, id,
1820 scan_data->lun, scan_data->rescan);
1821 }
1822
1823 user_scan_exit:
1824 mutex_unlock(&ihost->mutex);
1825 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1826 return 0;
1827 }
1828
1829 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1830 uint id, u64 lun)
1831 {
1832 struct iscsi_scan_data scan_data;
1833
1834 scan_data.channel = channel;
1835 scan_data.id = id;
1836 scan_data.lun = lun;
1837 scan_data.rescan = SCSI_SCAN_MANUAL;
1838
1839 return device_for_each_child(&shost->shost_gendev, &scan_data,
1840 iscsi_user_scan_session);
1841 }
1842
1843 static void iscsi_scan_session(struct work_struct *work)
1844 {
1845 struct iscsi_cls_session *session =
1846 container_of(work, struct iscsi_cls_session, scan_work);
1847 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1848 struct iscsi_cls_host *ihost = shost->shost_data;
1849 struct iscsi_scan_data scan_data;
1850
1851 scan_data.channel = 0;
1852 scan_data.id = SCAN_WILD_CARD;
1853 scan_data.lun = SCAN_WILD_CARD;
1854 scan_data.rescan = SCSI_SCAN_RESCAN;
1855
1856 iscsi_user_scan_session(&session->dev, &scan_data);
1857 atomic_dec(&ihost->nr_scans);
1858 }
1859
1860 /**
1861 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1862 * @cmd: scsi cmd passed to scsi eh handler
1863 *
1864 * If the session is down this function will wait for the recovery
1865 * timer to fire or for the session to be logged back in. If the
1866 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1867 * should pass this error value to the scsi eh.
1868 */
1869 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1870 {
1871 struct iscsi_cls_session *session =
1872 starget_to_session(scsi_target(cmd->device));
1873 unsigned long flags;
1874 int ret = 0;
1875
1876 spin_lock_irqsave(&session->lock, flags);
1877 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1878 if (session->state == ISCSI_SESSION_FREE) {
1879 ret = FAST_IO_FAIL;
1880 break;
1881 }
1882 spin_unlock_irqrestore(&session->lock, flags);
1883 msleep(1000);
1884 spin_lock_irqsave(&session->lock, flags);
1885 }
1886 spin_unlock_irqrestore(&session->lock, flags);
1887 return ret;
1888 }
1889 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1890
1891 static void session_recovery_timedout(struct work_struct *work)
1892 {
1893 struct iscsi_cls_session *session =
1894 container_of(work, struct iscsi_cls_session,
1895 recovery_work.work);
1896 unsigned long flags;
1897
1898 iscsi_cls_session_printk(KERN_INFO, session,
1899 "session recovery timed out after %d secs\n",
1900 session->recovery_tmo);
1901
1902 spin_lock_irqsave(&session->lock, flags);
1903 switch (session->state) {
1904 case ISCSI_SESSION_FAILED:
1905 session->state = ISCSI_SESSION_FREE;
1906 break;
1907 case ISCSI_SESSION_LOGGED_IN:
1908 case ISCSI_SESSION_FREE:
1909 /* we raced with the unblock's flush */
1910 spin_unlock_irqrestore(&session->lock, flags);
1911 return;
1912 }
1913 spin_unlock_irqrestore(&session->lock, flags);
1914
1915 if (session->transport->session_recovery_timedout)
1916 session->transport->session_recovery_timedout(session);
1917
1918 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1919 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1920 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1921 }
1922
1923 static void __iscsi_unblock_session(struct work_struct *work)
1924 {
1925 struct iscsi_cls_session *session =
1926 container_of(work, struct iscsi_cls_session,
1927 unblock_work);
1928 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1929 struct iscsi_cls_host *ihost = shost->shost_data;
1930 unsigned long flags;
1931
1932 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1933 /*
1934 * The recovery and unblock work get run from the same workqueue,
1935 * so try to cancel it if it was going to run after this unblock.
1936 */
1937 cancel_delayed_work(&session->recovery_work);
1938 spin_lock_irqsave(&session->lock, flags);
1939 session->state = ISCSI_SESSION_LOGGED_IN;
1940 spin_unlock_irqrestore(&session->lock, flags);
1941 /* start IO */
1942 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1943 /*
1944 * Only do kernel scanning if the driver is properly hooked into
1945 * the async scanning code (drivers like iscsi_tcp do login and
1946 * scanning from userspace).
1947 */
1948 if (shost->hostt->scan_finished) {
1949 if (scsi_queue_work(shost, &session->scan_work))
1950 atomic_inc(&ihost->nr_scans);
1951 }
1952 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1953 }
1954
1955 /**
1956 * iscsi_unblock_session - set a session as logged in and start IO.
1957 * @session: iscsi session
1958 *
1959 * Mark a session as ready to accept IO.
1960 */
1961 void iscsi_unblock_session(struct iscsi_cls_session *session)
1962 {
1963 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1964 /*
1965 * make sure all the events have completed before tell the driver
1966 * it is safe
1967 */
1968 flush_workqueue(iscsi_eh_timer_workq);
1969 }
1970 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1971
1972 static void __iscsi_block_session(struct work_struct *work)
1973 {
1974 struct iscsi_cls_session *session =
1975 container_of(work, struct iscsi_cls_session,
1976 block_work);
1977 unsigned long flags;
1978
1979 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1980 spin_lock_irqsave(&session->lock, flags);
1981 session->state = ISCSI_SESSION_FAILED;
1982 spin_unlock_irqrestore(&session->lock, flags);
1983 scsi_target_block(&session->dev);
1984 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1985 if (session->recovery_tmo >= 0)
1986 queue_delayed_work(iscsi_eh_timer_workq,
1987 &session->recovery_work,
1988 session->recovery_tmo * HZ);
1989 }
1990
1991 void iscsi_block_session(struct iscsi_cls_session *session)
1992 {
1993 queue_work(iscsi_eh_timer_workq, &session->block_work);
1994 }
1995 EXPORT_SYMBOL_GPL(iscsi_block_session);
1996
1997 static void __iscsi_unbind_session(struct work_struct *work)
1998 {
1999 struct iscsi_cls_session *session =
2000 container_of(work, struct iscsi_cls_session,
2001 unbind_work);
2002 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2003 struct iscsi_cls_host *ihost = shost->shost_data;
2004 unsigned long flags;
2005 unsigned int target_id;
2006
2007 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2008
2009 /* Prevent new scans and make sure scanning is not in progress */
2010 mutex_lock(&ihost->mutex);
2011 spin_lock_irqsave(&session->lock, flags);
2012 if (session->target_id == ISCSI_MAX_TARGET) {
2013 spin_unlock_irqrestore(&session->lock, flags);
2014 mutex_unlock(&ihost->mutex);
2015 return;
2016 }
2017
2018 target_id = session->target_id;
2019 session->target_id = ISCSI_MAX_TARGET;
2020 spin_unlock_irqrestore(&session->lock, flags);
2021 mutex_unlock(&ihost->mutex);
2022
2023 if (session->ida_used)
2024 ida_simple_remove(&iscsi_sess_ida, target_id);
2025
2026 scsi_remove_target(&session->dev);
2027 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2028 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2029 }
2030
2031 struct iscsi_cls_session *
2032 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2033 int dd_size)
2034 {
2035 struct iscsi_cls_session *session;
2036
2037 session = kzalloc(sizeof(*session) + dd_size,
2038 GFP_KERNEL);
2039 if (!session)
2040 return NULL;
2041
2042 session->transport = transport;
2043 session->creator = -1;
2044 session->recovery_tmo = 120;
2045 session->recovery_tmo_sysfs_override = false;
2046 session->state = ISCSI_SESSION_FREE;
2047 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2048 INIT_LIST_HEAD(&session->sess_list);
2049 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2050 INIT_WORK(&session->block_work, __iscsi_block_session);
2051 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2052 INIT_WORK(&session->scan_work, iscsi_scan_session);
2053 spin_lock_init(&session->lock);
2054
2055 /* this is released in the dev's release function */
2056 scsi_host_get(shost);
2057 session->dev.parent = &shost->shost_gendev;
2058 session->dev.release = iscsi_session_release;
2059 device_initialize(&session->dev);
2060 if (dd_size)
2061 session->dd_data = &session[1];
2062
2063 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2064 return session;
2065 }
2066 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2067
2068 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2069 {
2070 unsigned long flags;
2071 int id = 0;
2072 int err;
2073
2074 session->sid = atomic_add_return(1, &iscsi_session_nr);
2075
2076 if (target_id == ISCSI_MAX_TARGET) {
2077 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2078
2079 if (id < 0) {
2080 iscsi_cls_session_printk(KERN_ERR, session,
2081 "Failure in Target ID Allocation\n");
2082 return id;
2083 }
2084 session->target_id = (unsigned int)id;
2085 session->ida_used = true;
2086 } else
2087 session->target_id = target_id;
2088
2089 dev_set_name(&session->dev, "session%u", session->sid);
2090 err = device_add(&session->dev);
2091 if (err) {
2092 iscsi_cls_session_printk(KERN_ERR, session,
2093 "could not register session's dev\n");
2094 goto release_ida;
2095 }
2096 err = transport_register_device(&session->dev);
2097 if (err) {
2098 iscsi_cls_session_printk(KERN_ERR, session,
2099 "could not register transport's dev\n");
2100 goto release_dev;
2101 }
2102
2103 spin_lock_irqsave(&sesslock, flags);
2104 list_add(&session->sess_list, &sesslist);
2105 spin_unlock_irqrestore(&sesslock, flags);
2106
2107 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2108 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2109 return 0;
2110
2111 release_dev:
2112 device_del(&session->dev);
2113 release_ida:
2114 if (session->ida_used)
2115 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2116
2117 return err;
2118 }
2119 EXPORT_SYMBOL_GPL(iscsi_add_session);
2120
2121 /**
2122 * iscsi_create_session - create iscsi class session
2123 * @shost: scsi host
2124 * @transport: iscsi transport
2125 * @dd_size: private driver data size
2126 * @target_id: which target
2127 *
2128 * This can be called from a LLD or iscsi_transport.
2129 */
2130 struct iscsi_cls_session *
2131 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2132 int dd_size, unsigned int target_id)
2133 {
2134 struct iscsi_cls_session *session;
2135
2136 session = iscsi_alloc_session(shost, transport, dd_size);
2137 if (!session)
2138 return NULL;
2139
2140 if (iscsi_add_session(session, target_id)) {
2141 iscsi_free_session(session);
2142 return NULL;
2143 }
2144 return session;
2145 }
2146 EXPORT_SYMBOL_GPL(iscsi_create_session);
2147
2148 static void iscsi_conn_release(struct device *dev)
2149 {
2150 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2151 struct device *parent = conn->dev.parent;
2152
2153 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2154 kfree(conn);
2155 put_device(parent);
2156 }
2157
2158 static int iscsi_is_conn_dev(const struct device *dev)
2159 {
2160 return dev->release == iscsi_conn_release;
2161 }
2162
2163 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2164 {
2165 if (!iscsi_is_conn_dev(dev))
2166 return 0;
2167 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2168 }
2169
2170 void iscsi_remove_session(struct iscsi_cls_session *session)
2171 {
2172 unsigned long flags;
2173 int err;
2174
2175 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2176
2177 spin_lock_irqsave(&sesslock, flags);
2178 list_del(&session->sess_list);
2179 spin_unlock_irqrestore(&sesslock, flags);
2180
2181 /* make sure there are no blocks/unblocks queued */
2182 flush_workqueue(iscsi_eh_timer_workq);
2183 /* make sure the timedout callout is not running */
2184 if (!cancel_delayed_work(&session->recovery_work))
2185 flush_workqueue(iscsi_eh_timer_workq);
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 void iscsi_free_session(struct iscsi_cls_session *session)
2219 {
2220 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2221 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2222 put_device(&session->dev);
2223 }
2224 EXPORT_SYMBOL_GPL(iscsi_free_session);
2225
2226 /**
2227 * iscsi_create_conn - create iscsi class connection
2228 * @session: iscsi cls session
2229 * @dd_size: private driver data size
2230 * @cid: connection id
2231 *
2232 * This can be called from a LLD or iscsi_transport. The connection
2233 * is child of the session so cid must be unique for all connections
2234 * on the session.
2235 *
2236 * Since we do not support MCS, cid will normally be zero. In some cases
2237 * for software iscsi we could be trying to preallocate a connection struct
2238 * in which case there could be two connection structs and cid would be
2239 * non-zero.
2240 */
2241 struct iscsi_cls_conn *
2242 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2243 {
2244 struct iscsi_transport *transport = session->transport;
2245 struct iscsi_cls_conn *conn;
2246 unsigned long flags;
2247 int err;
2248
2249 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2250 if (!conn)
2251 return NULL;
2252 if (dd_size)
2253 conn->dd_data = &conn[1];
2254
2255 mutex_init(&conn->ep_mutex);
2256 INIT_LIST_HEAD(&conn->conn_list);
2257 conn->transport = transport;
2258 conn->cid = cid;
2259
2260 /* this is released in the dev's release function */
2261 if (!get_device(&session->dev))
2262 goto free_conn;
2263
2264 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2265 conn->dev.parent = &session->dev;
2266 conn->dev.release = iscsi_conn_release;
2267 err = device_register(&conn->dev);
2268 if (err) {
2269 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2270 "register connection's dev\n");
2271 goto release_parent_ref;
2272 }
2273 err = transport_register_device(&conn->dev);
2274 if (err) {
2275 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2276 "register transport's dev\n");
2277 goto release_conn_ref;
2278 }
2279
2280 spin_lock_irqsave(&connlock, flags);
2281 list_add(&conn->conn_list, &connlist);
2282 spin_unlock_irqrestore(&connlock, flags);
2283
2284 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2285 return conn;
2286
2287 release_conn_ref:
2288 put_device(&conn->dev);
2289 release_parent_ref:
2290 put_device(&session->dev);
2291 free_conn:
2292 kfree(conn);
2293 return NULL;
2294 }
2295
2296 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2297
2298 /**
2299 * iscsi_destroy_conn - destroy iscsi class connection
2300 * @conn: iscsi cls session
2301 *
2302 * This can be called from a LLD or iscsi_transport.
2303 */
2304 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2305 {
2306 unsigned long flags;
2307
2308 spin_lock_irqsave(&connlock, flags);
2309 list_del(&conn->conn_list);
2310 spin_unlock_irqrestore(&connlock, flags);
2311
2312 transport_unregister_device(&conn->dev);
2313 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2314 device_unregister(&conn->dev);
2315 return 0;
2316 }
2317 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2318
2319 /*
2320 * iscsi interface functions
2321 */
2322 static struct iscsi_internal *
2323 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2324 {
2325 struct iscsi_internal *priv;
2326 unsigned long flags;
2327
2328 spin_lock_irqsave(&iscsi_transport_lock, flags);
2329 list_for_each_entry(priv, &iscsi_transports, list) {
2330 if (tt == priv->iscsi_transport) {
2331 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2332 return priv;
2333 }
2334 }
2335 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2336 return NULL;
2337 }
2338
2339 static int
2340 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2341 {
2342 return nlmsg_multicast(nls, skb, 0, group, gfp);
2343 }
2344
2345 static int
2346 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2347 {
2348 return nlmsg_unicast(nls, skb, portid);
2349 }
2350
2351 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2352 char *data, uint32_t data_size)
2353 {
2354 struct nlmsghdr *nlh;
2355 struct sk_buff *skb;
2356 struct iscsi_uevent *ev;
2357 char *pdu;
2358 struct iscsi_internal *priv;
2359 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2360 data_size);
2361
2362 priv = iscsi_if_transport_lookup(conn->transport);
2363 if (!priv)
2364 return -EINVAL;
2365
2366 skb = alloc_skb(len, GFP_ATOMIC);
2367 if (!skb) {
2368 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2369 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2370 "control PDU: OOM\n");
2371 return -ENOMEM;
2372 }
2373
2374 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2375 ev = nlmsg_data(nlh);
2376 memset(ev, 0, sizeof(*ev));
2377 ev->transport_handle = iscsi_handle(conn->transport);
2378 ev->type = ISCSI_KEVENT_RECV_PDU;
2379 ev->r.recv_req.cid = conn->cid;
2380 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2381 pdu = (char*)ev + sizeof(*ev);
2382 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2383 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2384
2385 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2386 }
2387 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2388
2389 int iscsi_offload_mesg(struct Scsi_Host *shost,
2390 struct iscsi_transport *transport, uint32_t type,
2391 char *data, uint16_t data_size)
2392 {
2393 struct nlmsghdr *nlh;
2394 struct sk_buff *skb;
2395 struct iscsi_uevent *ev;
2396 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2397
2398 skb = alloc_skb(len, GFP_ATOMIC);
2399 if (!skb) {
2400 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2401 return -ENOMEM;
2402 }
2403
2404 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2405 ev = nlmsg_data(nlh);
2406 memset(ev, 0, sizeof(*ev));
2407 ev->type = type;
2408 ev->transport_handle = iscsi_handle(transport);
2409 switch (type) {
2410 case ISCSI_KEVENT_PATH_REQ:
2411 ev->r.req_path.host_no = shost->host_no;
2412 break;
2413 case ISCSI_KEVENT_IF_DOWN:
2414 ev->r.notify_if_down.host_no = shost->host_no;
2415 break;
2416 }
2417
2418 memcpy((char *)ev + sizeof(*ev), data, data_size);
2419
2420 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2421 }
2422 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2423
2424 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2425 {
2426 struct nlmsghdr *nlh;
2427 struct sk_buff *skb;
2428 struct iscsi_uevent *ev;
2429 struct iscsi_internal *priv;
2430 int len = nlmsg_total_size(sizeof(*ev));
2431
2432 priv = iscsi_if_transport_lookup(conn->transport);
2433 if (!priv)
2434 return;
2435
2436 skb = alloc_skb(len, GFP_ATOMIC);
2437 if (!skb) {
2438 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2439 "conn error (%d)\n", error);
2440 return;
2441 }
2442
2443 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2444 ev = nlmsg_data(nlh);
2445 ev->transport_handle = iscsi_handle(conn->transport);
2446 ev->type = ISCSI_KEVENT_CONN_ERROR;
2447 ev->r.connerror.error = error;
2448 ev->r.connerror.cid = conn->cid;
2449 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2450
2451 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2452
2453 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2454 error);
2455 }
2456 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2457
2458 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2459 enum iscsi_conn_state state)
2460 {
2461 struct nlmsghdr *nlh;
2462 struct sk_buff *skb;
2463 struct iscsi_uevent *ev;
2464 struct iscsi_internal *priv;
2465 int len = nlmsg_total_size(sizeof(*ev));
2466
2467 priv = iscsi_if_transport_lookup(conn->transport);
2468 if (!priv)
2469 return;
2470
2471 skb = alloc_skb(len, GFP_ATOMIC);
2472 if (!skb) {
2473 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2474 "conn login (%d)\n", state);
2475 return;
2476 }
2477
2478 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2479 ev = nlmsg_data(nlh);
2480 ev->transport_handle = iscsi_handle(conn->transport);
2481 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2482 ev->r.conn_login.state = state;
2483 ev->r.conn_login.cid = conn->cid;
2484 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2485 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2486
2487 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2488 state);
2489 }
2490 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2491
2492 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2493 enum iscsi_host_event_code code, uint32_t data_size,
2494 uint8_t *data)
2495 {
2496 struct nlmsghdr *nlh;
2497 struct sk_buff *skb;
2498 struct iscsi_uevent *ev;
2499 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2500
2501 skb = alloc_skb(len, GFP_NOIO);
2502 if (!skb) {
2503 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2504 host_no, code);
2505 return;
2506 }
2507
2508 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2509 ev = nlmsg_data(nlh);
2510 ev->transport_handle = iscsi_handle(transport);
2511 ev->type = ISCSI_KEVENT_HOST_EVENT;
2512 ev->r.host_event.host_no = host_no;
2513 ev->r.host_event.code = code;
2514 ev->r.host_event.data_size = data_size;
2515
2516 if (data_size)
2517 memcpy((char *)ev + sizeof(*ev), data, data_size);
2518
2519 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2520 }
2521 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2522
2523 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2524 uint32_t status, uint32_t pid, uint32_t data_size,
2525 uint8_t *data)
2526 {
2527 struct nlmsghdr *nlh;
2528 struct sk_buff *skb;
2529 struct iscsi_uevent *ev;
2530 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2531
2532 skb = alloc_skb(len, GFP_NOIO);
2533 if (!skb) {
2534 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2535 return;
2536 }
2537
2538 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2539 ev = nlmsg_data(nlh);
2540 ev->transport_handle = iscsi_handle(transport);
2541 ev->type = ISCSI_KEVENT_PING_COMP;
2542 ev->r.ping_comp.host_no = host_no;
2543 ev->r.ping_comp.status = status;
2544 ev->r.ping_comp.pid = pid;
2545 ev->r.ping_comp.data_size = data_size;
2546 memcpy((char *)ev + sizeof(*ev), data, data_size);
2547
2548 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2549 }
2550 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2551
2552 static int
2553 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2554 {
2555 struct sk_buff *skb;
2556 struct nlmsghdr *nlh;
2557 int len = nlmsg_total_size(size);
2558
2559 skb = alloc_skb(len, GFP_ATOMIC);
2560 if (!skb) {
2561 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2562 return -ENOMEM;
2563 }
2564
2565 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2566 memcpy(nlmsg_data(nlh), payload, size);
2567 return iscsi_unicast_skb(skb, portid);
2568 }
2569
2570 static int
2571 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2572 {
2573 struct iscsi_uevent *ev = nlmsg_data(nlh);
2574 struct iscsi_stats *stats;
2575 struct sk_buff *skbstat;
2576 struct iscsi_cls_conn *conn;
2577 struct nlmsghdr *nlhstat;
2578 struct iscsi_uevent *evstat;
2579 struct iscsi_internal *priv;
2580 int len = nlmsg_total_size(sizeof(*ev) +
2581 sizeof(struct iscsi_stats) +
2582 sizeof(struct iscsi_stats_custom) *
2583 ISCSI_STATS_CUSTOM_MAX);
2584 int err = 0;
2585
2586 priv = iscsi_if_transport_lookup(transport);
2587 if (!priv)
2588 return -EINVAL;
2589
2590 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2591 if (!conn)
2592 return -EEXIST;
2593
2594 do {
2595 int actual_size;
2596
2597 skbstat = alloc_skb(len, GFP_ATOMIC);
2598 if (!skbstat) {
2599 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2600 "deliver stats: OOM\n");
2601 return -ENOMEM;
2602 }
2603
2604 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2605 (len - sizeof(*nlhstat)), 0);
2606 evstat = nlmsg_data(nlhstat);
2607 memset(evstat, 0, sizeof(*evstat));
2608 evstat->transport_handle = iscsi_handle(conn->transport);
2609 evstat->type = nlh->nlmsg_type;
2610 evstat->u.get_stats.cid =
2611 ev->u.get_stats.cid;
2612 evstat->u.get_stats.sid =
2613 ev->u.get_stats.sid;
2614 stats = (struct iscsi_stats *)
2615 ((char*)evstat + sizeof(*evstat));
2616 memset(stats, 0, sizeof(*stats));
2617
2618 transport->get_stats(conn, stats);
2619 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2620 sizeof(struct iscsi_stats) +
2621 sizeof(struct iscsi_stats_custom) *
2622 stats->custom_length);
2623 actual_size -= sizeof(*nlhstat);
2624 actual_size = nlmsg_msg_size(actual_size);
2625 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2626 nlhstat->nlmsg_len = actual_size;
2627
2628 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2629 GFP_ATOMIC);
2630 } while (err < 0 && err != -ECONNREFUSED);
2631
2632 return err;
2633 }
2634
2635 /**
2636 * iscsi_session_event - send session destr. completion event
2637 * @session: iscsi class session
2638 * @event: type of event
2639 */
2640 int iscsi_session_event(struct iscsi_cls_session *session,
2641 enum iscsi_uevent_e event)
2642 {
2643 struct iscsi_internal *priv;
2644 struct Scsi_Host *shost;
2645 struct iscsi_uevent *ev;
2646 struct sk_buff *skb;
2647 struct nlmsghdr *nlh;
2648 int rc, len = nlmsg_total_size(sizeof(*ev));
2649
2650 priv = iscsi_if_transport_lookup(session->transport);
2651 if (!priv)
2652 return -EINVAL;
2653 shost = iscsi_session_to_shost(session);
2654
2655 skb = alloc_skb(len, GFP_KERNEL);
2656 if (!skb) {
2657 iscsi_cls_session_printk(KERN_ERR, session,
2658 "Cannot notify userspace of session "
2659 "event %u\n", event);
2660 return -ENOMEM;
2661 }
2662
2663 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2664 ev = nlmsg_data(nlh);
2665 ev->transport_handle = iscsi_handle(session->transport);
2666
2667 ev->type = event;
2668 switch (event) {
2669 case ISCSI_KEVENT_DESTROY_SESSION:
2670 ev->r.d_session.host_no = shost->host_no;
2671 ev->r.d_session.sid = session->sid;
2672 break;
2673 case ISCSI_KEVENT_CREATE_SESSION:
2674 ev->r.c_session_ret.host_no = shost->host_no;
2675 ev->r.c_session_ret.sid = session->sid;
2676 break;
2677 case ISCSI_KEVENT_UNBIND_SESSION:
2678 ev->r.unbind_session.host_no = shost->host_no;
2679 ev->r.unbind_session.sid = session->sid;
2680 break;
2681 default:
2682 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2683 "%u.\n", event);
2684 kfree_skb(skb);
2685 return -EINVAL;
2686 }
2687
2688 /*
2689 * this will occur if the daemon is not up, so we just warn
2690 * the user and when the daemon is restarted it will handle it
2691 */
2692 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2693 if (rc == -ESRCH)
2694 iscsi_cls_session_printk(KERN_ERR, session,
2695 "Cannot notify userspace of session "
2696 "event %u. Check iscsi daemon\n",
2697 event);
2698
2699 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2700 event, rc);
2701 return rc;
2702 }
2703 EXPORT_SYMBOL_GPL(iscsi_session_event);
2704
2705 static int
2706 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2707 struct iscsi_uevent *ev, pid_t pid,
2708 uint32_t initial_cmdsn, uint16_t cmds_max,
2709 uint16_t queue_depth)
2710 {
2711 struct iscsi_transport *transport = priv->iscsi_transport;
2712 struct iscsi_cls_session *session;
2713 struct Scsi_Host *shost;
2714
2715 session = transport->create_session(ep, cmds_max, queue_depth,
2716 initial_cmdsn);
2717 if (!session)
2718 return -ENOMEM;
2719
2720 session->creator = pid;
2721 shost = iscsi_session_to_shost(session);
2722 ev->r.c_session_ret.host_no = shost->host_no;
2723 ev->r.c_session_ret.sid = session->sid;
2724 ISCSI_DBG_TRANS_SESSION(session,
2725 "Completed creating transport session\n");
2726 return 0;
2727 }
2728
2729 static int
2730 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2731 {
2732 struct iscsi_cls_conn *conn;
2733 struct iscsi_cls_session *session;
2734
2735 session = iscsi_session_lookup(ev->u.c_conn.sid);
2736 if (!session) {
2737 printk(KERN_ERR "iscsi: invalid session %d.\n",
2738 ev->u.c_conn.sid);
2739 return -EINVAL;
2740 }
2741
2742 conn = transport->create_conn(session, ev->u.c_conn.cid);
2743 if (!conn) {
2744 iscsi_cls_session_printk(KERN_ERR, session,
2745 "couldn't create a new connection.");
2746 return -ENOMEM;
2747 }
2748
2749 ev->r.c_conn_ret.sid = session->sid;
2750 ev->r.c_conn_ret.cid = conn->cid;
2751
2752 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2753 return 0;
2754 }
2755
2756 static int
2757 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2758 {
2759 struct iscsi_cls_conn *conn;
2760
2761 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2762 if (!conn)
2763 return -EINVAL;
2764
2765 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2766 if (transport->destroy_conn)
2767 transport->destroy_conn(conn);
2768
2769 return 0;
2770 }
2771
2772 static int
2773 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2774 {
2775 char *data = (char*)ev + sizeof(*ev);
2776 struct iscsi_cls_conn *conn;
2777 struct iscsi_cls_session *session;
2778 int err = 0, value = 0;
2779
2780 session = iscsi_session_lookup(ev->u.set_param.sid);
2781 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2782 if (!conn || !session)
2783 return -EINVAL;
2784
2785 switch (ev->u.set_param.param) {
2786 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2787 sscanf(data, "%d", &value);
2788 if (!session->recovery_tmo_sysfs_override)
2789 session->recovery_tmo = value;
2790 break;
2791 default:
2792 err = transport->set_param(conn, ev->u.set_param.param,
2793 data, ev->u.set_param.len);
2794 }
2795
2796 return err;
2797 }
2798
2799 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2800 struct iscsi_uevent *ev, int msg_type)
2801 {
2802 struct iscsi_endpoint *ep;
2803 struct sockaddr *dst_addr;
2804 struct Scsi_Host *shost = NULL;
2805 int non_blocking, err = 0;
2806
2807 if (!transport->ep_connect)
2808 return -EINVAL;
2809
2810 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2811 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2812 if (!shost) {
2813 printk(KERN_ERR "ep connect failed. Could not find "
2814 "host no %u\n",
2815 ev->u.ep_connect_through_host.host_no);
2816 return -ENODEV;
2817 }
2818 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2819 } else
2820 non_blocking = ev->u.ep_connect.non_blocking;
2821
2822 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2823 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2824 if (IS_ERR(ep)) {
2825 err = PTR_ERR(ep);
2826 goto release_host;
2827 }
2828
2829 ev->r.ep_connect_ret.handle = ep->id;
2830 release_host:
2831 if (shost)
2832 scsi_host_put(shost);
2833 return err;
2834 }
2835
2836 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2837 u64 ep_handle)
2838 {
2839 struct iscsi_cls_conn *conn;
2840 struct iscsi_endpoint *ep;
2841
2842 if (!transport->ep_disconnect)
2843 return -EINVAL;
2844
2845 ep = iscsi_lookup_endpoint(ep_handle);
2846 if (!ep)
2847 return -EINVAL;
2848 conn = ep->conn;
2849 if (conn) {
2850 mutex_lock(&conn->ep_mutex);
2851 conn->ep = NULL;
2852 mutex_unlock(&conn->ep_mutex);
2853 }
2854
2855 transport->ep_disconnect(ep);
2856 return 0;
2857 }
2858
2859 static int
2860 iscsi_if_transport_ep(struct iscsi_transport *transport,
2861 struct iscsi_uevent *ev, int msg_type)
2862 {
2863 struct iscsi_endpoint *ep;
2864 int rc = 0;
2865
2866 switch (msg_type) {
2867 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2868 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2869 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2870 break;
2871 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2872 if (!transport->ep_poll)
2873 return -EINVAL;
2874
2875 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2876 if (!ep)
2877 return -EINVAL;
2878
2879 ev->r.retcode = transport->ep_poll(ep,
2880 ev->u.ep_poll.timeout_ms);
2881 break;
2882 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2883 rc = iscsi_if_ep_disconnect(transport,
2884 ev->u.ep_disconnect.ep_handle);
2885 break;
2886 }
2887 return rc;
2888 }
2889
2890 static int
2891 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2892 struct iscsi_uevent *ev)
2893 {
2894 struct Scsi_Host *shost;
2895 struct sockaddr *dst_addr;
2896 int err;
2897
2898 if (!transport->tgt_dscvr)
2899 return -EINVAL;
2900
2901 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2902 if (!shost) {
2903 printk(KERN_ERR "target discovery could not find host no %u\n",
2904 ev->u.tgt_dscvr.host_no);
2905 return -ENODEV;
2906 }
2907
2908
2909 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2910 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2911 ev->u.tgt_dscvr.enable, dst_addr);
2912 scsi_host_put(shost);
2913 return err;
2914 }
2915
2916 static int
2917 iscsi_set_host_param(struct iscsi_transport *transport,
2918 struct iscsi_uevent *ev)
2919 {
2920 char *data = (char*)ev + sizeof(*ev);
2921 struct Scsi_Host *shost;
2922 int err;
2923
2924 if (!transport->set_host_param)
2925 return -ENOSYS;
2926
2927 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2928 if (!shost) {
2929 printk(KERN_ERR "set_host_param could not find host no %u\n",
2930 ev->u.set_host_param.host_no);
2931 return -ENODEV;
2932 }
2933
2934 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2935 data, ev->u.set_host_param.len);
2936 scsi_host_put(shost);
2937 return err;
2938 }
2939
2940 static int
2941 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2942 {
2943 struct Scsi_Host *shost;
2944 struct iscsi_path *params;
2945 int err;
2946
2947 if (!transport->set_path)
2948 return -ENOSYS;
2949
2950 shost = scsi_host_lookup(ev->u.set_path.host_no);
2951 if (!shost) {
2952 printk(KERN_ERR "set path could not find host no %u\n",
2953 ev->u.set_path.host_no);
2954 return -ENODEV;
2955 }
2956
2957 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2958 err = transport->set_path(shost, params);
2959
2960 scsi_host_put(shost);
2961 return err;
2962 }
2963
2964 static int iscsi_session_has_conns(int sid)
2965 {
2966 struct iscsi_cls_conn *conn;
2967 unsigned long flags;
2968 int found = 0;
2969
2970 spin_lock_irqsave(&connlock, flags);
2971 list_for_each_entry(conn, &connlist, conn_list) {
2972 if (iscsi_conn_get_sid(conn) == sid) {
2973 found = 1;
2974 break;
2975 }
2976 }
2977 spin_unlock_irqrestore(&connlock, flags);
2978
2979 return found;
2980 }
2981
2982 static int
2983 iscsi_set_iface_params(struct iscsi_transport *transport,
2984 struct iscsi_uevent *ev, uint32_t len)
2985 {
2986 char *data = (char *)ev + sizeof(*ev);
2987 struct Scsi_Host *shost;
2988 int err;
2989
2990 if (!transport->set_iface_param)
2991 return -ENOSYS;
2992
2993 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2994 if (!shost) {
2995 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2996 ev->u.set_iface_params.host_no);
2997 return -ENODEV;
2998 }
2999
3000 err = transport->set_iface_param(shost, data, len);
3001 scsi_host_put(shost);
3002 return err;
3003 }
3004
3005 static int
3006 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3007 {
3008 struct Scsi_Host *shost;
3009 struct sockaddr *dst_addr;
3010 int err;
3011
3012 if (!transport->send_ping)
3013 return -ENOSYS;
3014
3015 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3016 if (!shost) {
3017 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3018 ev->u.iscsi_ping.host_no);
3019 return -ENODEV;
3020 }
3021
3022 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3023 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3024 ev->u.iscsi_ping.iface_type,
3025 ev->u.iscsi_ping.payload_size,
3026 ev->u.iscsi_ping.pid,
3027 dst_addr);
3028 scsi_host_put(shost);
3029 return err;
3030 }
3031
3032 static int
3033 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3034 {
3035 struct iscsi_uevent *ev = nlmsg_data(nlh);
3036 struct Scsi_Host *shost = NULL;
3037 struct iscsi_chap_rec *chap_rec;
3038 struct iscsi_internal *priv;
3039 struct sk_buff *skbchap;
3040 struct nlmsghdr *nlhchap;
3041 struct iscsi_uevent *evchap;
3042 uint32_t chap_buf_size;
3043 int len, err = 0;
3044 char *buf;
3045
3046 if (!transport->get_chap)
3047 return -EINVAL;
3048
3049 priv = iscsi_if_transport_lookup(transport);
3050 if (!priv)
3051 return -EINVAL;
3052
3053 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3054 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3055
3056 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3057 if (!shost) {
3058 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3059 __func__, ev->u.get_chap.host_no);
3060 return -ENODEV;
3061 }
3062
3063 do {
3064 int actual_size;
3065
3066 skbchap = alloc_skb(len, GFP_KERNEL);
3067 if (!skbchap) {
3068 printk(KERN_ERR "can not deliver chap: OOM\n");
3069 err = -ENOMEM;
3070 goto exit_get_chap;
3071 }
3072
3073 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3074 (len - sizeof(*nlhchap)), 0);
3075 evchap = nlmsg_data(nlhchap);
3076 memset(evchap, 0, sizeof(*evchap));
3077 evchap->transport_handle = iscsi_handle(transport);
3078 evchap->type = nlh->nlmsg_type;
3079 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3080 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3081 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3082 buf = (char *)evchap + sizeof(*evchap);
3083 memset(buf, 0, chap_buf_size);
3084
3085 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3086 &evchap->u.get_chap.num_entries, buf);
3087
3088 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3089 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3090 nlhchap->nlmsg_len = actual_size;
3091
3092 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3093 GFP_KERNEL);
3094 } while (err < 0 && err != -ECONNREFUSED);
3095
3096 exit_get_chap:
3097 scsi_host_put(shost);
3098 return err;
3099 }
3100
3101 static int iscsi_set_chap(struct iscsi_transport *transport,
3102 struct iscsi_uevent *ev, uint32_t len)
3103 {
3104 char *data = (char *)ev + sizeof(*ev);
3105 struct Scsi_Host *shost;
3106 int err = 0;
3107
3108 if (!transport->set_chap)
3109 return -ENOSYS;
3110
3111 shost = scsi_host_lookup(ev->u.set_path.host_no);
3112 if (!shost) {
3113 pr_err("%s could not find host no %u\n",
3114 __func__, ev->u.set_path.host_no);
3115 return -ENODEV;
3116 }
3117
3118 err = transport->set_chap(shost, data, len);
3119 scsi_host_put(shost);
3120 return err;
3121 }
3122
3123 static int iscsi_delete_chap(struct iscsi_transport *transport,
3124 struct iscsi_uevent *ev)
3125 {
3126 struct Scsi_Host *shost;
3127 int err = 0;
3128
3129 if (!transport->delete_chap)
3130 return -ENOSYS;
3131
3132 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3133 if (!shost) {
3134 printk(KERN_ERR "%s could not find host no %u\n",
3135 __func__, ev->u.delete_chap.host_no);
3136 return -ENODEV;
3137 }
3138
3139 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3140 scsi_host_put(shost);
3141 return err;
3142 }
3143
3144 static const struct {
3145 enum iscsi_discovery_parent_type value;
3146 char *name;
3147 } iscsi_discovery_parent_names[] = {
3148 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3149 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3150 {ISCSI_DISC_PARENT_ISNS, "isns" },
3151 };
3152
3153 char *iscsi_get_discovery_parent_name(int parent_type)
3154 {
3155 int i;
3156 char *state = "Unknown!";
3157
3158 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3159 if (iscsi_discovery_parent_names[i].value & parent_type) {
3160 state = iscsi_discovery_parent_names[i].name;
3161 break;
3162 }
3163 }
3164 return state;
3165 }
3166 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3167
3168 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3169 struct iscsi_uevent *ev, uint32_t len)
3170 {
3171 char *data = (char *)ev + sizeof(*ev);
3172 struct Scsi_Host *shost;
3173 struct iscsi_bus_flash_session *fnode_sess;
3174 struct iscsi_bus_flash_conn *fnode_conn;
3175 struct device *dev;
3176 uint32_t idx;
3177 int err = 0;
3178
3179 if (!transport->set_flashnode_param) {
3180 err = -ENOSYS;
3181 goto exit_set_fnode;
3182 }
3183
3184 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3185 if (!shost) {
3186 pr_err("%s could not find host no %u\n",
3187 __func__, ev->u.set_flashnode.host_no);
3188 err = -ENODEV;
3189 goto put_host;
3190 }
3191
3192 idx = ev->u.set_flashnode.flashnode_idx;
3193 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3194 if (!fnode_sess) {
3195 pr_err("%s could not find flashnode %u for host no %u\n",
3196 __func__, idx, ev->u.set_flashnode.host_no);
3197 err = -ENODEV;
3198 goto put_host;
3199 }
3200
3201 dev = iscsi_find_flashnode_conn(fnode_sess);
3202 if (!dev) {
3203 err = -ENODEV;
3204 goto put_sess;
3205 }
3206
3207 fnode_conn = iscsi_dev_to_flash_conn(dev);
3208 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3209 put_device(dev);
3210
3211 put_sess:
3212 put_device(&fnode_sess->dev);
3213
3214 put_host:
3215 scsi_host_put(shost);
3216
3217 exit_set_fnode:
3218 return err;
3219 }
3220
3221 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3222 struct iscsi_uevent *ev, uint32_t len)
3223 {
3224 char *data = (char *)ev + sizeof(*ev);
3225 struct Scsi_Host *shost;
3226 int index;
3227 int err = 0;
3228
3229 if (!transport->new_flashnode) {
3230 err = -ENOSYS;
3231 goto exit_new_fnode;
3232 }
3233
3234 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3235 if (!shost) {
3236 pr_err("%s could not find host no %u\n",
3237 __func__, ev->u.new_flashnode.host_no);
3238 err = -ENODEV;
3239 goto put_host;
3240 }
3241
3242 index = transport->new_flashnode(shost, data, len);
3243
3244 if (index >= 0)
3245 ev->r.new_flashnode_ret.flashnode_idx = index;
3246 else
3247 err = -EIO;
3248
3249 put_host:
3250 scsi_host_put(shost);
3251
3252 exit_new_fnode:
3253 return err;
3254 }
3255
3256 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3257 struct iscsi_uevent *ev)
3258 {
3259 struct Scsi_Host *shost;
3260 struct iscsi_bus_flash_session *fnode_sess;
3261 uint32_t idx;
3262 int err = 0;
3263
3264 if (!transport->del_flashnode) {
3265 err = -ENOSYS;
3266 goto exit_del_fnode;
3267 }
3268
3269 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3270 if (!shost) {
3271 pr_err("%s could not find host no %u\n",
3272 __func__, ev->u.del_flashnode.host_no);
3273 err = -ENODEV;
3274 goto put_host;
3275 }
3276
3277 idx = ev->u.del_flashnode.flashnode_idx;
3278 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3279 if (!fnode_sess) {
3280 pr_err("%s could not find flashnode %u for host no %u\n",
3281 __func__, idx, ev->u.del_flashnode.host_no);
3282 err = -ENODEV;
3283 goto put_host;
3284 }
3285
3286 err = transport->del_flashnode(fnode_sess);
3287 put_device(&fnode_sess->dev);
3288
3289 put_host:
3290 scsi_host_put(shost);
3291
3292 exit_del_fnode:
3293 return err;
3294 }
3295
3296 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3297 struct iscsi_uevent *ev)
3298 {
3299 struct Scsi_Host *shost;
3300 struct iscsi_bus_flash_session *fnode_sess;
3301 struct iscsi_bus_flash_conn *fnode_conn;
3302 struct device *dev;
3303 uint32_t idx;
3304 int err = 0;
3305
3306 if (!transport->login_flashnode) {
3307 err = -ENOSYS;
3308 goto exit_login_fnode;
3309 }
3310
3311 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3312 if (!shost) {
3313 pr_err("%s could not find host no %u\n",
3314 __func__, ev->u.login_flashnode.host_no);
3315 err = -ENODEV;
3316 goto put_host;
3317 }
3318
3319 idx = ev->u.login_flashnode.flashnode_idx;
3320 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3321 if (!fnode_sess) {
3322 pr_err("%s could not find flashnode %u for host no %u\n",
3323 __func__, idx, ev->u.login_flashnode.host_no);
3324 err = -ENODEV;
3325 goto put_host;
3326 }
3327
3328 dev = iscsi_find_flashnode_conn(fnode_sess);
3329 if (!dev) {
3330 err = -ENODEV;
3331 goto put_sess;
3332 }
3333
3334 fnode_conn = iscsi_dev_to_flash_conn(dev);
3335 err = transport->login_flashnode(fnode_sess, fnode_conn);
3336 put_device(dev);
3337
3338 put_sess:
3339 put_device(&fnode_sess->dev);
3340
3341 put_host:
3342 scsi_host_put(shost);
3343
3344 exit_login_fnode:
3345 return err;
3346 }
3347
3348 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3349 struct iscsi_uevent *ev)
3350 {
3351 struct Scsi_Host *shost;
3352 struct iscsi_bus_flash_session *fnode_sess;
3353 struct iscsi_bus_flash_conn *fnode_conn;
3354 struct device *dev;
3355 uint32_t idx;
3356 int err = 0;
3357
3358 if (!transport->logout_flashnode) {
3359 err = -ENOSYS;
3360 goto exit_logout_fnode;
3361 }
3362
3363 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3364 if (!shost) {
3365 pr_err("%s could not find host no %u\n",
3366 __func__, ev->u.logout_flashnode.host_no);
3367 err = -ENODEV;
3368 goto put_host;
3369 }
3370
3371 idx = ev->u.logout_flashnode.flashnode_idx;
3372 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3373 if (!fnode_sess) {
3374 pr_err("%s could not find flashnode %u for host no %u\n",
3375 __func__, idx, ev->u.logout_flashnode.host_no);
3376 err = -ENODEV;
3377 goto put_host;
3378 }
3379
3380 dev = iscsi_find_flashnode_conn(fnode_sess);
3381 if (!dev) {
3382 err = -ENODEV;
3383 goto put_sess;
3384 }
3385
3386 fnode_conn = iscsi_dev_to_flash_conn(dev);
3387
3388 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3389 put_device(dev);
3390
3391 put_sess:
3392 put_device(&fnode_sess->dev);
3393
3394 put_host:
3395 scsi_host_put(shost);
3396
3397 exit_logout_fnode:
3398 return err;
3399 }
3400
3401 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3402 struct iscsi_uevent *ev)
3403 {
3404 struct Scsi_Host *shost;
3405 struct iscsi_cls_session *session;
3406 int err = 0;
3407
3408 if (!transport->logout_flashnode_sid) {
3409 err = -ENOSYS;
3410 goto exit_logout_sid;
3411 }
3412
3413 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3414 if (!shost) {
3415 pr_err("%s could not find host no %u\n",
3416 __func__, ev->u.logout_flashnode.host_no);
3417 err = -ENODEV;
3418 goto put_host;
3419 }
3420
3421 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3422 if (!session) {
3423 pr_err("%s could not find session id %u\n",
3424 __func__, ev->u.logout_flashnode_sid.sid);
3425 err = -EINVAL;
3426 goto put_host;
3427 }
3428
3429 err = transport->logout_flashnode_sid(session);
3430
3431 put_host:
3432 scsi_host_put(shost);
3433
3434 exit_logout_sid:
3435 return err;
3436 }
3437
3438 static int
3439 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3440 {
3441 struct iscsi_uevent *ev = nlmsg_data(nlh);
3442 struct Scsi_Host *shost = NULL;
3443 struct iscsi_internal *priv;
3444 struct sk_buff *skbhost_stats;
3445 struct nlmsghdr *nlhhost_stats;
3446 struct iscsi_uevent *evhost_stats;
3447 int host_stats_size = 0;
3448 int len, err = 0;
3449 char *buf;
3450
3451 if (!transport->get_host_stats)
3452 return -ENOSYS;
3453
3454 priv = iscsi_if_transport_lookup(transport);
3455 if (!priv)
3456 return -EINVAL;
3457
3458 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3459 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3460
3461 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3462 if (!shost) {
3463 pr_err("%s: failed. Could not find host no %u\n",
3464 __func__, ev->u.get_host_stats.host_no);
3465 return -ENODEV;
3466 }
3467
3468 do {
3469 int actual_size;
3470
3471 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3472 if (!skbhost_stats) {
3473 pr_err("cannot deliver host stats: OOM\n");
3474 err = -ENOMEM;
3475 goto exit_host_stats;
3476 }
3477
3478 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3479 (len - sizeof(*nlhhost_stats)), 0);
3480 evhost_stats = nlmsg_data(nlhhost_stats);
3481 memset(evhost_stats, 0, sizeof(*evhost_stats));
3482 evhost_stats->transport_handle = iscsi_handle(transport);
3483 evhost_stats->type = nlh->nlmsg_type;
3484 evhost_stats->u.get_host_stats.host_no =
3485 ev->u.get_host_stats.host_no;
3486 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3487 memset(buf, 0, host_stats_size);
3488
3489 err = transport->get_host_stats(shost, buf, host_stats_size);
3490 if (err) {
3491 kfree_skb(skbhost_stats);
3492 goto exit_host_stats;
3493 }
3494
3495 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3496 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3497 nlhhost_stats->nlmsg_len = actual_size;
3498
3499 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3500 GFP_KERNEL);
3501 } while (err < 0 && err != -ECONNREFUSED);
3502
3503 exit_host_stats:
3504 scsi_host_put(shost);
3505 return err;
3506 }
3507
3508
3509 static int
3510 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3511 {
3512 int err = 0;
3513 u32 portid;
3514 struct iscsi_uevent *ev = nlmsg_data(nlh);
3515 struct iscsi_transport *transport = NULL;
3516 struct iscsi_internal *priv;
3517 struct iscsi_cls_session *session;
3518 struct iscsi_cls_conn *conn;
3519 struct iscsi_endpoint *ep = NULL;
3520
3521 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3522 *group = ISCSI_NL_GRP_UIP;
3523 else
3524 *group = ISCSI_NL_GRP_ISCSID;
3525
3526 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3527 if (!priv)
3528 return -EINVAL;
3529 transport = priv->iscsi_transport;
3530
3531 if (!try_module_get(transport->owner))
3532 return -EINVAL;
3533
3534 portid = NETLINK_CB(skb).portid;
3535
3536 switch (nlh->nlmsg_type) {
3537 case ISCSI_UEVENT_CREATE_SESSION:
3538 err = iscsi_if_create_session(priv, ep, ev,
3539 portid,
3540 ev->u.c_session.initial_cmdsn,
3541 ev->u.c_session.cmds_max,
3542 ev->u.c_session.queue_depth);
3543 break;
3544 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3545 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3546 if (!ep) {
3547 err = -EINVAL;
3548 break;
3549 }
3550
3551 err = iscsi_if_create_session(priv, ep, ev,
3552 portid,
3553 ev->u.c_bound_session.initial_cmdsn,
3554 ev->u.c_bound_session.cmds_max,
3555 ev->u.c_bound_session.queue_depth);
3556 break;
3557 case ISCSI_UEVENT_DESTROY_SESSION:
3558 session = iscsi_session_lookup(ev->u.d_session.sid);
3559 if (!session)
3560 err = -EINVAL;
3561 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3562 err = -EBUSY;
3563 else
3564 transport->destroy_session(session);
3565 break;
3566 case ISCSI_UEVENT_UNBIND_SESSION:
3567 session = iscsi_session_lookup(ev->u.d_session.sid);
3568 if (session)
3569 scsi_queue_work(iscsi_session_to_shost(session),
3570 &session->unbind_work);
3571 else
3572 err = -EINVAL;
3573 break;
3574 case ISCSI_UEVENT_CREATE_CONN:
3575 err = iscsi_if_create_conn(transport, ev);
3576 break;
3577 case ISCSI_UEVENT_DESTROY_CONN:
3578 err = iscsi_if_destroy_conn(transport, ev);
3579 break;
3580 case ISCSI_UEVENT_BIND_CONN:
3581 session = iscsi_session_lookup(ev->u.b_conn.sid);
3582 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3583
3584 if (conn && conn->ep)
3585 iscsi_if_ep_disconnect(transport, conn->ep->id);
3586
3587 if (!session || !conn) {
3588 err = -EINVAL;
3589 break;
3590 }
3591
3592 ev->r.retcode = transport->bind_conn(session, conn,
3593 ev->u.b_conn.transport_eph,
3594 ev->u.b_conn.is_leading);
3595 if (ev->r.retcode || !transport->ep_connect)
3596 break;
3597
3598 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3599 if (ep) {
3600 ep->conn = conn;
3601
3602 mutex_lock(&conn->ep_mutex);
3603 conn->ep = ep;
3604 mutex_unlock(&conn->ep_mutex);
3605 } else
3606 iscsi_cls_conn_printk(KERN_ERR, conn,
3607 "Could not set ep conn "
3608 "binding\n");
3609 break;
3610 case ISCSI_UEVENT_SET_PARAM:
3611 err = iscsi_set_param(transport, ev);
3612 break;
3613 case ISCSI_UEVENT_START_CONN:
3614 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3615 if (conn)
3616 ev->r.retcode = transport->start_conn(conn);
3617 else
3618 err = -EINVAL;
3619 break;
3620 case ISCSI_UEVENT_STOP_CONN:
3621 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3622 if (conn)
3623 transport->stop_conn(conn, ev->u.stop_conn.flag);
3624 else
3625 err = -EINVAL;
3626 break;
3627 case ISCSI_UEVENT_SEND_PDU:
3628 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3629 if (conn)
3630 ev->r.retcode = transport->send_pdu(conn,
3631 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3632 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3633 ev->u.send_pdu.data_size);
3634 else
3635 err = -EINVAL;
3636 break;
3637 case ISCSI_UEVENT_GET_STATS:
3638 err = iscsi_if_get_stats(transport, nlh);
3639 break;
3640 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3641 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3642 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3643 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3644 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3645 break;
3646 case ISCSI_UEVENT_TGT_DSCVR:
3647 err = iscsi_tgt_dscvr(transport, ev);
3648 break;
3649 case ISCSI_UEVENT_SET_HOST_PARAM:
3650 err = iscsi_set_host_param(transport, ev);
3651 break;
3652 case ISCSI_UEVENT_PATH_UPDATE:
3653 err = iscsi_set_path(transport, ev);
3654 break;
3655 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3656 err = iscsi_set_iface_params(transport, ev,
3657 nlmsg_attrlen(nlh, sizeof(*ev)));
3658 break;
3659 case ISCSI_UEVENT_PING:
3660 err = iscsi_send_ping(transport, ev);
3661 break;
3662 case ISCSI_UEVENT_GET_CHAP:
3663 err = iscsi_get_chap(transport, nlh);
3664 break;
3665 case ISCSI_UEVENT_DELETE_CHAP:
3666 err = iscsi_delete_chap(transport, ev);
3667 break;
3668 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3669 err = iscsi_set_flashnode_param(transport, ev,
3670 nlmsg_attrlen(nlh,
3671 sizeof(*ev)));
3672 break;
3673 case ISCSI_UEVENT_NEW_FLASHNODE:
3674 err = iscsi_new_flashnode(transport, ev,
3675 nlmsg_attrlen(nlh, sizeof(*ev)));
3676 break;
3677 case ISCSI_UEVENT_DEL_FLASHNODE:
3678 err = iscsi_del_flashnode(transport, ev);
3679 break;
3680 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3681 err = iscsi_login_flashnode(transport, ev);
3682 break;
3683 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3684 err = iscsi_logout_flashnode(transport, ev);
3685 break;
3686 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3687 err = iscsi_logout_flashnode_sid(transport, ev);
3688 break;
3689 case ISCSI_UEVENT_SET_CHAP:
3690 err = iscsi_set_chap(transport, ev,
3691 nlmsg_attrlen(nlh, sizeof(*ev)));
3692 break;
3693 case ISCSI_UEVENT_GET_HOST_STATS:
3694 err = iscsi_get_host_stats(transport, nlh);
3695 break;
3696 default:
3697 err = -ENOSYS;
3698 break;
3699 }
3700
3701 module_put(transport->owner);
3702 return err;
3703 }
3704
3705 /*
3706 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3707 * Malformed skbs with wrong lengths or invalid creds are not processed.
3708 */
3709 static void
3710 iscsi_if_rx(struct sk_buff *skb)
3711 {
3712 u32 portid = NETLINK_CB(skb).portid;
3713
3714 mutex_lock(&rx_queue_mutex);
3715 while (skb->len >= NLMSG_HDRLEN) {
3716 int err;
3717 uint32_t rlen;
3718 struct nlmsghdr *nlh;
3719 struct iscsi_uevent *ev;
3720 uint32_t group;
3721 int retries = ISCSI_SEND_MAX_ALLOWED;
3722
3723 nlh = nlmsg_hdr(skb);
3724 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3725 skb->len < nlh->nlmsg_len) {
3726 break;
3727 }
3728
3729 ev = nlmsg_data(nlh);
3730 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3731 if (rlen > skb->len)
3732 rlen = skb->len;
3733
3734 err = iscsi_if_recv_msg(skb, nlh, &group);
3735 if (err) {
3736 ev->type = ISCSI_KEVENT_IF_ERROR;
3737 ev->iferror = err;
3738 }
3739 do {
3740 /*
3741 * special case for GET_STATS:
3742 * on success - sending reply and stats from
3743 * inside of if_recv_msg(),
3744 * on error - fall through.
3745 */
3746 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3747 break;
3748 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3749 break;
3750 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3751 ev, sizeof(*ev));
3752 if (err == -EAGAIN && --retries < 0) {
3753 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3754 break;
3755 }
3756 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3757 skb_pull(skb, rlen);
3758 }
3759 mutex_unlock(&rx_queue_mutex);
3760 }
3761
3762 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3763 struct device_attribute dev_attr_##_prefix##_##_name = \
3764 __ATTR(_name,_mode,_show,_store)
3765
3766 /*
3767 * iSCSI connection attrs
3768 */
3769 #define iscsi_conn_attr_show(param) \
3770 static ssize_t \
3771 show_conn_param_##param(struct device *dev, \
3772 struct device_attribute *attr, char *buf) \
3773 { \
3774 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3775 struct iscsi_transport *t = conn->transport; \
3776 return t->get_conn_param(conn, param, buf); \
3777 }
3778
3779 #define iscsi_conn_attr(field, param) \
3780 iscsi_conn_attr_show(param) \
3781 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3782 NULL);
3783
3784 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3785 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3786 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3787 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3788 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3789 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3790 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3791 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3792 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3793 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3794 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3795 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3796 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3797 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3798 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3799 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3800 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3801 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3802 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3803 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3804 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3805 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3806 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3807 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3808 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3809 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3810 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3811 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3812
3813
3814 #define iscsi_conn_ep_attr_show(param) \
3815 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3816 struct device_attribute *attr,\
3817 char *buf) \
3818 { \
3819 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3820 struct iscsi_transport *t = conn->transport; \
3821 struct iscsi_endpoint *ep; \
3822 ssize_t rc; \
3823 \
3824 /* \
3825 * Need to make sure ep_disconnect does not free the LLD's \
3826 * interconnect resources while we are trying to read them. \
3827 */ \
3828 mutex_lock(&conn->ep_mutex); \
3829 ep = conn->ep; \
3830 if (!ep && t->ep_connect) { \
3831 mutex_unlock(&conn->ep_mutex); \
3832 return -ENOTCONN; \
3833 } \
3834 \
3835 if (ep) \
3836 rc = t->get_ep_param(ep, param, buf); \
3837 else \
3838 rc = t->get_conn_param(conn, param, buf); \
3839 mutex_unlock(&conn->ep_mutex); \
3840 return rc; \
3841 }
3842
3843 #define iscsi_conn_ep_attr(field, param) \
3844 iscsi_conn_ep_attr_show(param) \
3845 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3846 show_conn_ep_param_##param, NULL);
3847
3848 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3849 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3850
3851 static struct attribute *iscsi_conn_attrs[] = {
3852 &dev_attr_conn_max_recv_dlength.attr,
3853 &dev_attr_conn_max_xmit_dlength.attr,
3854 &dev_attr_conn_header_digest.attr,
3855 &dev_attr_conn_data_digest.attr,
3856 &dev_attr_conn_ifmarker.attr,
3857 &dev_attr_conn_ofmarker.attr,
3858 &dev_attr_conn_address.attr,
3859 &dev_attr_conn_port.attr,
3860 &dev_attr_conn_exp_statsn.attr,
3861 &dev_attr_conn_persistent_address.attr,
3862 &dev_attr_conn_persistent_port.attr,
3863 &dev_attr_conn_ping_tmo.attr,
3864 &dev_attr_conn_recv_tmo.attr,
3865 &dev_attr_conn_local_port.attr,
3866 &dev_attr_conn_statsn.attr,
3867 &dev_attr_conn_keepalive_tmo.attr,
3868 &dev_attr_conn_max_segment_size.attr,
3869 &dev_attr_conn_tcp_timestamp_stat.attr,
3870 &dev_attr_conn_tcp_wsf_disable.attr,
3871 &dev_attr_conn_tcp_nagle_disable.attr,
3872 &dev_attr_conn_tcp_timer_scale.attr,
3873 &dev_attr_conn_tcp_timestamp_enable.attr,
3874 &dev_attr_conn_fragment_disable.attr,
3875 &dev_attr_conn_ipv4_tos.attr,
3876 &dev_attr_conn_ipv6_traffic_class.attr,
3877 &dev_attr_conn_ipv6_flow_label.attr,
3878 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3879 &dev_attr_conn_tcp_xmit_wsf.attr,
3880 &dev_attr_conn_tcp_recv_wsf.attr,
3881 &dev_attr_conn_local_ipaddr.attr,
3882 NULL,
3883 };
3884
3885 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3886 struct attribute *attr, int i)
3887 {
3888 struct device *cdev = container_of(kobj, struct device, kobj);
3889 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3890 struct iscsi_transport *t = conn->transport;
3891 int param;
3892
3893 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3894 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3895 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3896 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3897 else if (attr == &dev_attr_conn_header_digest.attr)
3898 param = ISCSI_PARAM_HDRDGST_EN;
3899 else if (attr == &dev_attr_conn_data_digest.attr)
3900 param = ISCSI_PARAM_DATADGST_EN;
3901 else if (attr == &dev_attr_conn_ifmarker.attr)
3902 param = ISCSI_PARAM_IFMARKER_EN;
3903 else if (attr == &dev_attr_conn_ofmarker.attr)
3904 param = ISCSI_PARAM_OFMARKER_EN;
3905 else if (attr == &dev_attr_conn_address.attr)
3906 param = ISCSI_PARAM_CONN_ADDRESS;
3907 else if (attr == &dev_attr_conn_port.attr)
3908 param = ISCSI_PARAM_CONN_PORT;
3909 else if (attr == &dev_attr_conn_exp_statsn.attr)
3910 param = ISCSI_PARAM_EXP_STATSN;
3911 else if (attr == &dev_attr_conn_persistent_address.attr)
3912 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3913 else if (attr == &dev_attr_conn_persistent_port.attr)
3914 param = ISCSI_PARAM_PERSISTENT_PORT;
3915 else if (attr == &dev_attr_conn_ping_tmo.attr)
3916 param = ISCSI_PARAM_PING_TMO;
3917 else if (attr == &dev_attr_conn_recv_tmo.attr)
3918 param = ISCSI_PARAM_RECV_TMO;
3919 else if (attr == &dev_attr_conn_local_port.attr)
3920 param = ISCSI_PARAM_LOCAL_PORT;
3921 else if (attr == &dev_attr_conn_statsn.attr)
3922 param = ISCSI_PARAM_STATSN;
3923 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3924 param = ISCSI_PARAM_KEEPALIVE_TMO;
3925 else if (attr == &dev_attr_conn_max_segment_size.attr)
3926 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3927 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3928 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3929 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3930 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3931 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3932 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3933 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3934 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3935 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3936 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3937 else if (attr == &dev_attr_conn_fragment_disable.attr)
3938 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3939 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3940 param = ISCSI_PARAM_IPV4_TOS;
3941 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3942 param = ISCSI_PARAM_IPV6_TC;
3943 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3944 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3945 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3946 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3947 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3948 param = ISCSI_PARAM_TCP_XMIT_WSF;
3949 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3950 param = ISCSI_PARAM_TCP_RECV_WSF;
3951 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3952 param = ISCSI_PARAM_LOCAL_IPADDR;
3953 else {
3954 WARN_ONCE(1, "Invalid conn attr");
3955 return 0;
3956 }
3957
3958 return t->attr_is_visible(ISCSI_PARAM, param);
3959 }
3960
3961 static struct attribute_group iscsi_conn_group = {
3962 .attrs = iscsi_conn_attrs,
3963 .is_visible = iscsi_conn_attr_is_visible,
3964 };
3965
3966 /*
3967 * iSCSI session attrs
3968 */
3969 #define iscsi_session_attr_show(param, perm) \
3970 static ssize_t \
3971 show_session_param_##param(struct device *dev, \
3972 struct device_attribute *attr, char *buf) \
3973 { \
3974 struct iscsi_cls_session *session = \
3975 iscsi_dev_to_session(dev->parent); \
3976 struct iscsi_transport *t = session->transport; \
3977 \
3978 if (perm && !capable(CAP_SYS_ADMIN)) \
3979 return -EACCES; \
3980 return t->get_session_param(session, param, buf); \
3981 }
3982
3983 #define iscsi_session_attr(field, param, perm) \
3984 iscsi_session_attr_show(param, perm) \
3985 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3986 NULL);
3987 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3988 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3989 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3990 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3991 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3992 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3993 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3994 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3995 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3996 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3997 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3998 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3999 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4000 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4001 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4002 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4003 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4004 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4005 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4006 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4007 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4008 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4009 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4010 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4011 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4012 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4013 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4014 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4015 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4016 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4017 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4018 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4019 iscsi_session_attr(discovery_auth_optional,
4020 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4021 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4022 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4023 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4024 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4025 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4026 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4027 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4028
4029 static ssize_t
4030 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4031 char *buf)
4032 {
4033 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4034 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4035 }
4036 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4037 NULL);
4038 static ssize_t
4039 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4040 char *buf)
4041 {
4042 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4043 return sprintf(buf, "%d\n", session->creator);
4044 }
4045 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4046 NULL);
4047 static ssize_t
4048 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4049 char *buf)
4050 {
4051 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4052 return sprintf(buf, "%d\n", session->target_id);
4053 }
4054 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4055 show_priv_session_target_id, NULL);
4056
4057 #define iscsi_priv_session_attr_show(field, format) \
4058 static ssize_t \
4059 show_priv_session_##field(struct device *dev, \
4060 struct device_attribute *attr, char *buf) \
4061 { \
4062 struct iscsi_cls_session *session = \
4063 iscsi_dev_to_session(dev->parent); \
4064 if (session->field == -1) \
4065 return sprintf(buf, "off\n"); \
4066 return sprintf(buf, format"\n", session->field); \
4067 }
4068
4069 #define iscsi_priv_session_attr_store(field) \
4070 static ssize_t \
4071 store_priv_session_##field(struct device *dev, \
4072 struct device_attribute *attr, \
4073 const char *buf, size_t count) \
4074 { \
4075 int val; \
4076 char *cp; \
4077 struct iscsi_cls_session *session = \
4078 iscsi_dev_to_session(dev->parent); \
4079 if ((session->state == ISCSI_SESSION_FREE) || \
4080 (session->state == ISCSI_SESSION_FAILED)) \
4081 return -EBUSY; \
4082 if (strncmp(buf, "off", 3) == 0) { \
4083 session->field = -1; \
4084 session->field##_sysfs_override = true; \
4085 } else { \
4086 val = simple_strtoul(buf, &cp, 0); \
4087 if (*cp != '\0' && *cp != '\n') \
4088 return -EINVAL; \
4089 session->field = val; \
4090 session->field##_sysfs_override = true; \
4091 } \
4092 return count; \
4093 }
4094
4095 #define iscsi_priv_session_rw_attr(field, format) \
4096 iscsi_priv_session_attr_show(field, format) \
4097 iscsi_priv_session_attr_store(field) \
4098 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4099 show_priv_session_##field, \
4100 store_priv_session_##field)
4101
4102 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4103
4104 static struct attribute *iscsi_session_attrs[] = {
4105 &dev_attr_sess_initial_r2t.attr,
4106 &dev_attr_sess_max_outstanding_r2t.attr,
4107 &dev_attr_sess_immediate_data.attr,
4108 &dev_attr_sess_first_burst_len.attr,
4109 &dev_attr_sess_max_burst_len.attr,
4110 &dev_attr_sess_data_pdu_in_order.attr,
4111 &dev_attr_sess_data_seq_in_order.attr,
4112 &dev_attr_sess_erl.attr,
4113 &dev_attr_sess_targetname.attr,
4114 &dev_attr_sess_tpgt.attr,
4115 &dev_attr_sess_password.attr,
4116 &dev_attr_sess_password_in.attr,
4117 &dev_attr_sess_username.attr,
4118 &dev_attr_sess_username_in.attr,
4119 &dev_attr_sess_fast_abort.attr,
4120 &dev_attr_sess_abort_tmo.attr,
4121 &dev_attr_sess_lu_reset_tmo.attr,
4122 &dev_attr_sess_tgt_reset_tmo.attr,
4123 &dev_attr_sess_ifacename.attr,
4124 &dev_attr_sess_initiatorname.attr,
4125 &dev_attr_sess_targetalias.attr,
4126 &dev_attr_sess_boot_root.attr,
4127 &dev_attr_sess_boot_nic.attr,
4128 &dev_attr_sess_boot_target.attr,
4129 &dev_attr_priv_sess_recovery_tmo.attr,
4130 &dev_attr_priv_sess_state.attr,
4131 &dev_attr_priv_sess_creator.attr,
4132 &dev_attr_sess_chap_out_idx.attr,
4133 &dev_attr_sess_chap_in_idx.attr,
4134 &dev_attr_priv_sess_target_id.attr,
4135 &dev_attr_sess_auto_snd_tgt_disable.attr,
4136 &dev_attr_sess_discovery_session.attr,
4137 &dev_attr_sess_portal_type.attr,
4138 &dev_attr_sess_chap_auth.attr,
4139 &dev_attr_sess_discovery_logout.attr,
4140 &dev_attr_sess_bidi_chap.attr,
4141 &dev_attr_sess_discovery_auth_optional.attr,
4142 &dev_attr_sess_def_time2wait.attr,
4143 &dev_attr_sess_def_time2retain.attr,
4144 &dev_attr_sess_isid.attr,
4145 &dev_attr_sess_tsid.attr,
4146 &dev_attr_sess_def_taskmgmt_tmo.attr,
4147 &dev_attr_sess_discovery_parent_idx.attr,
4148 &dev_attr_sess_discovery_parent_type.attr,
4149 NULL,
4150 };
4151
4152 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4153 struct attribute *attr, int i)
4154 {
4155 struct device *cdev = container_of(kobj, struct device, kobj);
4156 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4157 struct iscsi_transport *t = session->transport;
4158 int param;
4159
4160 if (attr == &dev_attr_sess_initial_r2t.attr)
4161 param = ISCSI_PARAM_INITIAL_R2T_EN;
4162 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4163 param = ISCSI_PARAM_MAX_R2T;
4164 else if (attr == &dev_attr_sess_immediate_data.attr)
4165 param = ISCSI_PARAM_IMM_DATA_EN;
4166 else if (attr == &dev_attr_sess_first_burst_len.attr)
4167 param = ISCSI_PARAM_FIRST_BURST;
4168 else if (attr == &dev_attr_sess_max_burst_len.attr)
4169 param = ISCSI_PARAM_MAX_BURST;
4170 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4171 param = ISCSI_PARAM_PDU_INORDER_EN;
4172 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4173 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4174 else if (attr == &dev_attr_sess_erl.attr)
4175 param = ISCSI_PARAM_ERL;
4176 else if (attr == &dev_attr_sess_targetname.attr)
4177 param = ISCSI_PARAM_TARGET_NAME;
4178 else if (attr == &dev_attr_sess_tpgt.attr)
4179 param = ISCSI_PARAM_TPGT;
4180 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4181 param = ISCSI_PARAM_CHAP_IN_IDX;
4182 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4183 param = ISCSI_PARAM_CHAP_OUT_IDX;
4184 else if (attr == &dev_attr_sess_password.attr)
4185 param = ISCSI_PARAM_USERNAME;
4186 else if (attr == &dev_attr_sess_password_in.attr)
4187 param = ISCSI_PARAM_USERNAME_IN;
4188 else if (attr == &dev_attr_sess_username.attr)
4189 param = ISCSI_PARAM_PASSWORD;
4190 else if (attr == &dev_attr_sess_username_in.attr)
4191 param = ISCSI_PARAM_PASSWORD_IN;
4192 else if (attr == &dev_attr_sess_fast_abort.attr)
4193 param = ISCSI_PARAM_FAST_ABORT;
4194 else if (attr == &dev_attr_sess_abort_tmo.attr)
4195 param = ISCSI_PARAM_ABORT_TMO;
4196 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4197 param = ISCSI_PARAM_LU_RESET_TMO;
4198 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4199 param = ISCSI_PARAM_TGT_RESET_TMO;
4200 else if (attr == &dev_attr_sess_ifacename.attr)
4201 param = ISCSI_PARAM_IFACE_NAME;
4202 else if (attr == &dev_attr_sess_initiatorname.attr)
4203 param = ISCSI_PARAM_INITIATOR_NAME;
4204 else if (attr == &dev_attr_sess_targetalias.attr)
4205 param = ISCSI_PARAM_TARGET_ALIAS;
4206 else if (attr == &dev_attr_sess_boot_root.attr)
4207 param = ISCSI_PARAM_BOOT_ROOT;
4208 else if (attr == &dev_attr_sess_boot_nic.attr)
4209 param = ISCSI_PARAM_BOOT_NIC;
4210 else if (attr == &dev_attr_sess_boot_target.attr)
4211 param = ISCSI_PARAM_BOOT_TARGET;
4212 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4213 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4214 else if (attr == &dev_attr_sess_discovery_session.attr)
4215 param = ISCSI_PARAM_DISCOVERY_SESS;
4216 else if (attr == &dev_attr_sess_portal_type.attr)
4217 param = ISCSI_PARAM_PORTAL_TYPE;
4218 else if (attr == &dev_attr_sess_chap_auth.attr)
4219 param = ISCSI_PARAM_CHAP_AUTH_EN;
4220 else if (attr == &dev_attr_sess_discovery_logout.attr)
4221 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4222 else if (attr == &dev_attr_sess_bidi_chap.attr)
4223 param = ISCSI_PARAM_BIDI_CHAP_EN;
4224 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4225 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4226 else if (attr == &dev_attr_sess_def_time2wait.attr)
4227 param = ISCSI_PARAM_DEF_TIME2WAIT;
4228 else if (attr == &dev_attr_sess_def_time2retain.attr)
4229 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4230 else if (attr == &dev_attr_sess_isid.attr)
4231 param = ISCSI_PARAM_ISID;
4232 else if (attr == &dev_attr_sess_tsid.attr)
4233 param = ISCSI_PARAM_TSID;
4234 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4235 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4236 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4237 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4238 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4239 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4240 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4241 return S_IRUGO | S_IWUSR;
4242 else if (attr == &dev_attr_priv_sess_state.attr)
4243 return S_IRUGO;
4244 else if (attr == &dev_attr_priv_sess_creator.attr)
4245 return S_IRUGO;
4246 else if (attr == &dev_attr_priv_sess_target_id.attr)
4247 return S_IRUGO;
4248 else {
4249 WARN_ONCE(1, "Invalid session attr");
4250 return 0;
4251 }
4252
4253 return t->attr_is_visible(ISCSI_PARAM, param);
4254 }
4255
4256 static struct attribute_group iscsi_session_group = {
4257 .attrs = iscsi_session_attrs,
4258 .is_visible = iscsi_session_attr_is_visible,
4259 };
4260
4261 /*
4262 * iSCSI host attrs
4263 */
4264 #define iscsi_host_attr_show(param) \
4265 static ssize_t \
4266 show_host_param_##param(struct device *dev, \
4267 struct device_attribute *attr, char *buf) \
4268 { \
4269 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4270 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4271 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4272 }
4273
4274 #define iscsi_host_attr(field, param) \
4275 iscsi_host_attr_show(param) \
4276 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4277 NULL);
4278
4279 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4280 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4281 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4282 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4283 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4284 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4285
4286 static struct attribute *iscsi_host_attrs[] = {
4287 &dev_attr_host_netdev.attr,
4288 &dev_attr_host_hwaddress.attr,
4289 &dev_attr_host_ipaddress.attr,
4290 &dev_attr_host_initiatorname.attr,
4291 &dev_attr_host_port_state.attr,
4292 &dev_attr_host_port_speed.attr,
4293 NULL,
4294 };
4295
4296 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4297 struct attribute *attr, int i)
4298 {
4299 struct device *cdev = container_of(kobj, struct device, kobj);
4300 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4301 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4302 int param;
4303
4304 if (attr == &dev_attr_host_netdev.attr)
4305 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4306 else if (attr == &dev_attr_host_hwaddress.attr)
4307 param = ISCSI_HOST_PARAM_HWADDRESS;
4308 else if (attr == &dev_attr_host_ipaddress.attr)
4309 param = ISCSI_HOST_PARAM_IPADDRESS;
4310 else if (attr == &dev_attr_host_initiatorname.attr)
4311 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4312 else if (attr == &dev_attr_host_port_state.attr)
4313 param = ISCSI_HOST_PARAM_PORT_STATE;
4314 else if (attr == &dev_attr_host_port_speed.attr)
4315 param = ISCSI_HOST_PARAM_PORT_SPEED;
4316 else {
4317 WARN_ONCE(1, "Invalid host attr");
4318 return 0;
4319 }
4320
4321 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4322 }
4323
4324 static struct attribute_group iscsi_host_group = {
4325 .attrs = iscsi_host_attrs,
4326 .is_visible = iscsi_host_attr_is_visible,
4327 };
4328
4329 /* convert iscsi_port_speed values to ascii string name */
4330 static const struct {
4331 enum iscsi_port_speed value;
4332 char *name;
4333 } iscsi_port_speed_names[] = {
4334 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4335 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4336 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4337 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4338 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4339 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4340 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4341 };
4342
4343 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4344 {
4345 int i;
4346 char *speed = "Unknown!";
4347 struct iscsi_cls_host *ihost = shost->shost_data;
4348 uint32_t port_speed = ihost->port_speed;
4349
4350 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4351 if (iscsi_port_speed_names[i].value & port_speed) {
4352 speed = iscsi_port_speed_names[i].name;
4353 break;
4354 }
4355 }
4356 return speed;
4357 }
4358 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4359
4360 /* convert iscsi_port_state values to ascii string name */
4361 static const struct {
4362 enum iscsi_port_state value;
4363 char *name;
4364 } iscsi_port_state_names[] = {
4365 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4366 {ISCSI_PORT_STATE_UP, "LINK UP" },
4367 };
4368
4369 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4370 {
4371 int i;
4372 char *state = "Unknown!";
4373 struct iscsi_cls_host *ihost = shost->shost_data;
4374 uint32_t port_state = ihost->port_state;
4375
4376 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4377 if (iscsi_port_state_names[i].value & port_state) {
4378 state = iscsi_port_state_names[i].name;
4379 break;
4380 }
4381 }
4382 return state;
4383 }
4384 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4385
4386 static int iscsi_session_match(struct attribute_container *cont,
4387 struct device *dev)
4388 {
4389 struct iscsi_cls_session *session;
4390 struct Scsi_Host *shost;
4391 struct iscsi_internal *priv;
4392
4393 if (!iscsi_is_session_dev(dev))
4394 return 0;
4395
4396 session = iscsi_dev_to_session(dev);
4397 shost = iscsi_session_to_shost(session);
4398 if (!shost->transportt)
4399 return 0;
4400
4401 priv = to_iscsi_internal(shost->transportt);
4402 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4403 return 0;
4404
4405 return &priv->session_cont.ac == cont;
4406 }
4407
4408 static int iscsi_conn_match(struct attribute_container *cont,
4409 struct device *dev)
4410 {
4411 struct iscsi_cls_session *session;
4412 struct iscsi_cls_conn *conn;
4413 struct Scsi_Host *shost;
4414 struct iscsi_internal *priv;
4415
4416 if (!iscsi_is_conn_dev(dev))
4417 return 0;
4418
4419 conn = iscsi_dev_to_conn(dev);
4420 session = iscsi_dev_to_session(conn->dev.parent);
4421 shost = iscsi_session_to_shost(session);
4422
4423 if (!shost->transportt)
4424 return 0;
4425
4426 priv = to_iscsi_internal(shost->transportt);
4427 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4428 return 0;
4429
4430 return &priv->conn_cont.ac == cont;
4431 }
4432
4433 static int iscsi_host_match(struct attribute_container *cont,
4434 struct device *dev)
4435 {
4436 struct Scsi_Host *shost;
4437 struct iscsi_internal *priv;
4438
4439 if (!scsi_is_host_device(dev))
4440 return 0;
4441
4442 shost = dev_to_shost(dev);
4443 if (!shost->transportt ||
4444 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4445 return 0;
4446
4447 priv = to_iscsi_internal(shost->transportt);
4448 return &priv->t.host_attrs.ac == cont;
4449 }
4450
4451 struct scsi_transport_template *
4452 iscsi_register_transport(struct iscsi_transport *tt)
4453 {
4454 struct iscsi_internal *priv;
4455 unsigned long flags;
4456 int err;
4457
4458 BUG_ON(!tt);
4459
4460 priv = iscsi_if_transport_lookup(tt);
4461 if (priv)
4462 return NULL;
4463
4464 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4465 if (!priv)
4466 return NULL;
4467 INIT_LIST_HEAD(&priv->list);
4468 priv->iscsi_transport = tt;
4469 priv->t.user_scan = iscsi_user_scan;
4470 priv->t.create_work_queue = 1;
4471
4472 priv->dev.class = &iscsi_transport_class;
4473 dev_set_name(&priv->dev, "%s", tt->name);
4474 err = device_register(&priv->dev);
4475 if (err)
4476 goto free_priv;
4477
4478 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4479 if (err)
4480 goto unregister_dev;
4481
4482 /* host parameters */
4483 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4484 priv->t.host_attrs.ac.match = iscsi_host_match;
4485 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4486 priv->t.host_size = sizeof(struct iscsi_cls_host);
4487 transport_container_register(&priv->t.host_attrs);
4488
4489 /* connection parameters */
4490 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4491 priv->conn_cont.ac.match = iscsi_conn_match;
4492 priv->conn_cont.ac.grp = &iscsi_conn_group;
4493 transport_container_register(&priv->conn_cont);
4494
4495 /* session parameters */
4496 priv->session_cont.ac.class = &iscsi_session_class.class;
4497 priv->session_cont.ac.match = iscsi_session_match;
4498 priv->session_cont.ac.grp = &iscsi_session_group;
4499 transport_container_register(&priv->session_cont);
4500
4501 spin_lock_irqsave(&iscsi_transport_lock, flags);
4502 list_add(&priv->list, &iscsi_transports);
4503 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4504
4505 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4506 return &priv->t;
4507
4508 unregister_dev:
4509 device_unregister(&priv->dev);
4510 return NULL;
4511 free_priv:
4512 kfree(priv);
4513 return NULL;
4514 }
4515 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4516
4517 int iscsi_unregister_transport(struct iscsi_transport *tt)
4518 {
4519 struct iscsi_internal *priv;
4520 unsigned long flags;
4521
4522 BUG_ON(!tt);
4523
4524 mutex_lock(&rx_queue_mutex);
4525
4526 priv = iscsi_if_transport_lookup(tt);
4527 BUG_ON (!priv);
4528
4529 spin_lock_irqsave(&iscsi_transport_lock, flags);
4530 list_del(&priv->list);
4531 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4532
4533 transport_container_unregister(&priv->conn_cont);
4534 transport_container_unregister(&priv->session_cont);
4535 transport_container_unregister(&priv->t.host_attrs);
4536
4537 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4538 device_unregister(&priv->dev);
4539 mutex_unlock(&rx_queue_mutex);
4540
4541 return 0;
4542 }
4543 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4544
4545 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4546 struct device *dev, const char *fmt, ...)
4547 {
4548 struct va_format vaf;
4549 va_list args;
4550
4551 va_start(args, fmt);
4552 vaf.fmt = fmt;
4553 vaf.va = &args;
4554 trace(dev, &vaf);
4555 va_end(args);
4556 }
4557 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4558
4559 static __init int iscsi_transport_init(void)
4560 {
4561 int err;
4562 struct netlink_kernel_cfg cfg = {
4563 .groups = 1,
4564 .input = iscsi_if_rx,
4565 };
4566 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4567 ISCSI_TRANSPORT_VERSION);
4568
4569 atomic_set(&iscsi_session_nr, 0);
4570
4571 err = class_register(&iscsi_transport_class);
4572 if (err)
4573 return err;
4574
4575 err = class_register(&iscsi_endpoint_class);
4576 if (err)
4577 goto unregister_transport_class;
4578
4579 err = class_register(&iscsi_iface_class);
4580 if (err)
4581 goto unregister_endpoint_class;
4582
4583 err = transport_class_register(&iscsi_host_class);
4584 if (err)
4585 goto unregister_iface_class;
4586
4587 err = transport_class_register(&iscsi_connection_class);
4588 if (err)
4589 goto unregister_host_class;
4590
4591 err = transport_class_register(&iscsi_session_class);
4592 if (err)
4593 goto unregister_conn_class;
4594
4595 err = bus_register(&iscsi_flashnode_bus);
4596 if (err)
4597 goto unregister_session_class;
4598
4599 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4600 if (!nls) {
4601 err = -ENOBUFS;
4602 goto unregister_flashnode_bus;
4603 }
4604
4605 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4606 if (!iscsi_eh_timer_workq) {
4607 err = -ENOMEM;
4608 goto release_nls;
4609 }
4610
4611 return 0;
4612
4613 release_nls:
4614 netlink_kernel_release(nls);
4615 unregister_flashnode_bus:
4616 bus_unregister(&iscsi_flashnode_bus);
4617 unregister_session_class:
4618 transport_class_unregister(&iscsi_session_class);
4619 unregister_conn_class:
4620 transport_class_unregister(&iscsi_connection_class);
4621 unregister_host_class:
4622 transport_class_unregister(&iscsi_host_class);
4623 unregister_iface_class:
4624 class_unregister(&iscsi_iface_class);
4625 unregister_endpoint_class:
4626 class_unregister(&iscsi_endpoint_class);
4627 unregister_transport_class:
4628 class_unregister(&iscsi_transport_class);
4629 return err;
4630 }
4631
4632 static void __exit iscsi_transport_exit(void)
4633 {
4634 destroy_workqueue(iscsi_eh_timer_workq);
4635 netlink_kernel_release(nls);
4636 bus_unregister(&iscsi_flashnode_bus);
4637 transport_class_unregister(&iscsi_connection_class);
4638 transport_class_unregister(&iscsi_session_class);
4639 transport_class_unregister(&iscsi_host_class);
4640 class_unregister(&iscsi_endpoint_class);
4641 class_unregister(&iscsi_iface_class);
4642 class_unregister(&iscsi_transport_class);
4643 }
4644
4645 module_init(iscsi_transport_init);
4646 module_exit(iscsi_transport_exit);
4647
4648 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4649 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4650 "Alex Aizman <itn780@yahoo.com>");
4651 MODULE_DESCRIPTION("iSCSI Transport Interface");
4652 MODULE_LICENSE("GPL");
4653 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4654 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux with added FPC-III support