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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
34
35EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);
36EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);
37EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);
38EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);
39EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);
40
41static int dbg_session;
42module_param_named(debug_session, dbg_session, int,
43 S_IRUGO | S_IWUSR);
44MODULE_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
49static int dbg_conn;
50module_param_named(debug_conn, dbg_conn, int,
51 S_IRUGO | S_IWUSR);
52MODULE_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
79struct 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
89static atomic_t iscsi_session_nr;
90static struct workqueue_struct *iscsi_eh_timer_workq;
91
92static struct workqueue_struct *iscsi_conn_cleanup_workq;
93
94static DEFINE_IDA(iscsi_sess_ida);
95
96
97
98
99
100static LIST_HEAD(iscsi_transports);
101static DEFINE_SPINLOCK(iscsi_transport_lock);
102
103#define to_iscsi_internal(tmpl) \
104 container_of(tmpl, struct iscsi_internal, t)
105
106#define dev_to_iscsi_internal(_dev) \
107 container_of(_dev, struct iscsi_internal, dev)
108
109static void iscsi_transport_release(struct device *dev)
110{
111 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
112 kfree(priv);
113}
114
115
116
117
118
119static struct class iscsi_transport_class = {
120 .name = "iscsi_transport",
121 .dev_release = iscsi_transport_release,
122};
123
124static ssize_t
125show_transport_handle(struct device *dev, struct device_attribute *attr,
126 char *buf)
127{
128 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
129
130 if (!capable(CAP_SYS_ADMIN))
131 return -EACCES;
132 return sysfs_emit(buf, "%llu\n",
133 (unsigned long long)iscsi_handle(priv->iscsi_transport));
134}
135static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
136
137#define show_transport_attr(name, format) \
138static ssize_t \
139show_transport_##name(struct device *dev, \
140 struct device_attribute *attr,char *buf) \
141{ \
142 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
143 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
144} \
145static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
146
147show_transport_attr(caps, "0x%x");
148
149static struct attribute *iscsi_transport_attrs[] = {
150 &dev_attr_handle.attr,
151 &dev_attr_caps.attr,
152 NULL,
153};
154
155static struct attribute_group iscsi_transport_group = {
156 .attrs = iscsi_transport_attrs,
157};
158
159
160
161
162#define iscsi_dev_to_endpoint(_dev) \
163 container_of(_dev, struct iscsi_endpoint, dev)
164
165#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
166struct device_attribute dev_attr_##_prefix##_##_name = \
167 __ATTR(_name,_mode,_show,_store)
168
169static void iscsi_endpoint_release(struct device *dev)
170{
171 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
172 kfree(ep);
173}
174
175static struct class iscsi_endpoint_class = {
176 .name = "iscsi_endpoint",
177 .dev_release = iscsi_endpoint_release,
178};
179
180static ssize_t
181show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
182{
183 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
184 return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id);
185}
186static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
187
188static struct attribute *iscsi_endpoint_attrs[] = {
189 &dev_attr_ep_handle.attr,
190 NULL,
191};
192
193static struct attribute_group iscsi_endpoint_group = {
194 .attrs = iscsi_endpoint_attrs,
195};
196
197#define ISCSI_MAX_EPID -1
198
199static int iscsi_match_epid(struct device *dev, const void *data)
200{
201 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
202 const uint64_t *epid = data;
203
204 return *epid == ep->id;
205}
206
207struct iscsi_endpoint *
208iscsi_create_endpoint(int dd_size)
209{
210 struct device *dev;
211 struct iscsi_endpoint *ep;
212 uint64_t id;
213 int err;
214
215 for (id = 1; id < ISCSI_MAX_EPID; id++) {
216 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
217 iscsi_match_epid);
218 if (!dev)
219 break;
220 else
221 put_device(dev);
222 }
223 if (id == ISCSI_MAX_EPID) {
224 printk(KERN_ERR "Too many connections. Max supported %u\n",
225 ISCSI_MAX_EPID - 1);
226 return NULL;
227 }
228
229 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
230 if (!ep)
231 return NULL;
232
233 ep->id = id;
234 ep->dev.class = &iscsi_endpoint_class;
235 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
236 err = device_register(&ep->dev);
237 if (err)
238 goto free_ep;
239
240 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
241 if (err)
242 goto unregister_dev;
243
244 if (dd_size)
245 ep->dd_data = &ep[1];
246 return ep;
247
248unregister_dev:
249 device_unregister(&ep->dev);
250 return NULL;
251
252free_ep:
253 kfree(ep);
254 return NULL;
255}
256EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
257
258void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
259{
260 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
261 device_unregister(&ep->dev);
262}
263EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
264
265void iscsi_put_endpoint(struct iscsi_endpoint *ep)
266{
267 put_device(&ep->dev);
268}
269EXPORT_SYMBOL_GPL(iscsi_put_endpoint);
270
271
272
273
274
275
276
277struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
278{
279 struct device *dev;
280
281 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
282 iscsi_match_epid);
283 if (!dev)
284 return NULL;
285
286 return iscsi_dev_to_endpoint(dev);
287}
288EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
289
290
291
292
293
294static void iscsi_iface_release(struct device *dev)
295{
296 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
297 struct device *parent = iface->dev.parent;
298
299 kfree(iface);
300 put_device(parent);
301}
302
303
304static struct class iscsi_iface_class = {
305 .name = "iscsi_iface",
306 .dev_release = iscsi_iface_release,
307};
308
309#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
310struct device_attribute dev_attr_##_prefix##_##_name = \
311 __ATTR(_name, _mode, _show, _store)
312
313
314#define iscsi_iface_attr_show(type, name, param_type, param) \
315static ssize_t \
316show_##type##_##name(struct device *dev, struct device_attribute *attr, \
317 char *buf) \
318{ \
319 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
320 struct iscsi_transport *t = iface->transport; \
321 return t->get_iface_param(iface, param_type, param, buf); \
322} \
323
324#define iscsi_iface_net_attr(type, name, param) \
325 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
326static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
327
328#define iscsi_iface_attr(type, name, param) \
329 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
330static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
331
332
333iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
334iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
335iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
336iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
337iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
338 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
339iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
340 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
341iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
342iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
343iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
344 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
345iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
346 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
347iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
348 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
349iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
350 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
351iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
352 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
353iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
354 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
355iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
356 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
357iscsi_iface_net_attr(ipv4_iface, fragment_disable,
358 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
359iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
360 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
361iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
362
363
364iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
365iscsi_iface_net_attr(ipv6_iface, link_local_addr,
366 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
367iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
368iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
369 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
370iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
371 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
372iscsi_iface_net_attr(ipv6_iface, link_local_state,
373 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
374iscsi_iface_net_attr(ipv6_iface, router_state,
375 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
376iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
377 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
378iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
379iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
380iscsi_iface_net_attr(ipv6_iface, traffic_class,
381 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
382iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
383iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
384 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
385iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
386 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
387iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
388 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
389iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
390 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
391iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
392 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
393
394
395iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
396iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
397iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
398iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
399iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
400iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
401iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
402iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
403iscsi_iface_net_attr(iface, tcp_nagle_disable,
404 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
405iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
406iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
407iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
408iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
409iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
410iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
411
412
413iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
414iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
415iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
416iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
417iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
418iscsi_iface_attr(iface, data_seq_in_order,
419 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
420iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
421iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
422iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
423iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
424iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
425iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
426iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
427iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
428iscsi_iface_attr(iface, discovery_auth_optional,
429 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
430iscsi_iface_attr(iface, discovery_logout,
431 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
432iscsi_iface_attr(iface, strict_login_comp_en,
433 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
434iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
435
436static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
437 struct attribute *attr, int i)
438{
439 struct device *dev = container_of(kobj, struct device, kobj);
440 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
441 struct iscsi_transport *t = iface->transport;
442 int param = -1;
443
444 if (attr == &dev_attr_iface_enabled.attr)
445 param = ISCSI_NET_PARAM_IFACE_ENABLE;
446 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
447 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
448 else if (attr == &dev_attr_iface_header_digest.attr)
449 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
450 else if (attr == &dev_attr_iface_data_digest.attr)
451 param = ISCSI_IFACE_PARAM_DATADGST_EN;
452 else if (attr == &dev_attr_iface_immediate_data.attr)
453 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
454 else if (attr == &dev_attr_iface_initial_r2t.attr)
455 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
456 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
457 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
458 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
459 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
460 else if (attr == &dev_attr_iface_erl.attr)
461 param = ISCSI_IFACE_PARAM_ERL;
462 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
463 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
464 else if (attr == &dev_attr_iface_first_burst_len.attr)
465 param = ISCSI_IFACE_PARAM_FIRST_BURST;
466 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
467 param = ISCSI_IFACE_PARAM_MAX_R2T;
468 else if (attr == &dev_attr_iface_max_burst_len.attr)
469 param = ISCSI_IFACE_PARAM_MAX_BURST;
470 else if (attr == &dev_attr_iface_chap_auth.attr)
471 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
472 else if (attr == &dev_attr_iface_bidi_chap.attr)
473 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
474 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
475 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
476 else if (attr == &dev_attr_iface_discovery_logout.attr)
477 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
478 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
479 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
480 else if (attr == &dev_attr_iface_initiator_name.attr)
481 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
482
483 if (param != -1)
484 return t->attr_is_visible(ISCSI_IFACE_PARAM, param);
485
486 if (attr == &dev_attr_iface_vlan_id.attr)
487 param = ISCSI_NET_PARAM_VLAN_ID;
488 else if (attr == &dev_attr_iface_vlan_priority.attr)
489 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
490 else if (attr == &dev_attr_iface_vlan_enabled.attr)
491 param = ISCSI_NET_PARAM_VLAN_ENABLED;
492 else if (attr == &dev_attr_iface_mtu.attr)
493 param = ISCSI_NET_PARAM_MTU;
494 else if (attr == &dev_attr_iface_port.attr)
495 param = ISCSI_NET_PARAM_PORT;
496 else if (attr == &dev_attr_iface_ipaddress_state.attr)
497 param = ISCSI_NET_PARAM_IPADDR_STATE;
498 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
499 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
500 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
501 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
502 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
503 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
504 else if (attr == &dev_attr_iface_tcp_wsf.attr)
505 param = ISCSI_NET_PARAM_TCP_WSF;
506 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
507 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
508 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
509 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
510 else if (attr == &dev_attr_iface_cache_id.attr)
511 param = ISCSI_NET_PARAM_CACHE_ID;
512 else if (attr == &dev_attr_iface_redirect_en.attr)
513 param = ISCSI_NET_PARAM_REDIRECT_EN;
514 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
515 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
516 param = ISCSI_NET_PARAM_IPV4_ADDR;
517 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
518 param = ISCSI_NET_PARAM_IPV4_GW;
519 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
520 param = ISCSI_NET_PARAM_IPV4_SUBNET;
521 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
522 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
523 else if (attr ==
524 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
525 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
526 else if (attr ==
527 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
528 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
529 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
530 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
531 else if (attr == &dev_attr_ipv4_iface_tos.attr)
532 param = ISCSI_NET_PARAM_IPV4_TOS;
533 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
534 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
535 else if (attr ==
536 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
537 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
538 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
539 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
540 else if (attr ==
541 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
542 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
543 else if (attr ==
544 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
545 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
546 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
547 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
548 else if (attr ==
549 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
550 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
551 else if (attr ==
552 &dev_attr_ipv4_iface_fragment_disable.attr)
553 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
554 else if (attr ==
555 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
556 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
557 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
558 param = ISCSI_NET_PARAM_IPV4_TTL;
559 else
560 return 0;
561 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
562 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
563 param = ISCSI_NET_PARAM_IPV6_ADDR;
564 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
565 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
566 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
567 param = ISCSI_NET_PARAM_IPV6_ROUTER;
568 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
569 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
570 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
571 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
572 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
573 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
574 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
575 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
576 else if (attr ==
577 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
578 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
579 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
580 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
581 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
582 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
583 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
584 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
585 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
586 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
587 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
588 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
589 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
590 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
591 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
592 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
593 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
594 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
595 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
596 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
597 else
598 return 0;
599 } else {
600 WARN_ONCE(1, "Invalid iface attr");
601 return 0;
602 }
603
604 return t->attr_is_visible(ISCSI_NET_PARAM, param);
605}
606
607static struct attribute *iscsi_iface_attrs[] = {
608 &dev_attr_iface_enabled.attr,
609 &dev_attr_iface_vlan_id.attr,
610 &dev_attr_iface_vlan_priority.attr,
611 &dev_attr_iface_vlan_enabled.attr,
612 &dev_attr_ipv4_iface_ipaddress.attr,
613 &dev_attr_ipv4_iface_gateway.attr,
614 &dev_attr_ipv4_iface_subnet.attr,
615 &dev_attr_ipv4_iface_bootproto.attr,
616 &dev_attr_ipv6_iface_ipaddress.attr,
617 &dev_attr_ipv6_iface_link_local_addr.attr,
618 &dev_attr_ipv6_iface_router_addr.attr,
619 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
620 &dev_attr_ipv6_iface_link_local_autocfg.attr,
621 &dev_attr_iface_mtu.attr,
622 &dev_attr_iface_port.attr,
623 &dev_attr_iface_ipaddress_state.attr,
624 &dev_attr_iface_delayed_ack_en.attr,
625 &dev_attr_iface_tcp_nagle_disable.attr,
626 &dev_attr_iface_tcp_wsf_disable.attr,
627 &dev_attr_iface_tcp_wsf.attr,
628 &dev_attr_iface_tcp_timer_scale.attr,
629 &dev_attr_iface_tcp_timestamp_en.attr,
630 &dev_attr_iface_cache_id.attr,
631 &dev_attr_iface_redirect_en.attr,
632 &dev_attr_iface_def_taskmgmt_tmo.attr,
633 &dev_attr_iface_header_digest.attr,
634 &dev_attr_iface_data_digest.attr,
635 &dev_attr_iface_immediate_data.attr,
636 &dev_attr_iface_initial_r2t.attr,
637 &dev_attr_iface_data_seq_in_order.attr,
638 &dev_attr_iface_data_pdu_in_order.attr,
639 &dev_attr_iface_erl.attr,
640 &dev_attr_iface_max_recv_dlength.attr,
641 &dev_attr_iface_first_burst_len.attr,
642 &dev_attr_iface_max_outstanding_r2t.attr,
643 &dev_attr_iface_max_burst_len.attr,
644 &dev_attr_iface_chap_auth.attr,
645 &dev_attr_iface_bidi_chap.attr,
646 &dev_attr_iface_discovery_auth_optional.attr,
647 &dev_attr_iface_discovery_logout.attr,
648 &dev_attr_iface_strict_login_comp_en.attr,
649 &dev_attr_iface_initiator_name.attr,
650 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
651 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
652 &dev_attr_ipv4_iface_tos_en.attr,
653 &dev_attr_ipv4_iface_tos.attr,
654 &dev_attr_ipv4_iface_grat_arp_en.attr,
655 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
656 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
657 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
658 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
659 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
660 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
661 &dev_attr_ipv4_iface_fragment_disable.attr,
662 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
663 &dev_attr_ipv4_iface_ttl.attr,
664 &dev_attr_ipv6_iface_link_local_state.attr,
665 &dev_attr_ipv6_iface_router_state.attr,
666 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
667 &dev_attr_ipv6_iface_mld_en.attr,
668 &dev_attr_ipv6_iface_flow_label.attr,
669 &dev_attr_ipv6_iface_traffic_class.attr,
670 &dev_attr_ipv6_iface_hop_limit.attr,
671 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
672 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
673 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
674 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
675 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
676 NULL,
677};
678
679static struct attribute_group iscsi_iface_group = {
680 .attrs = iscsi_iface_attrs,
681 .is_visible = iscsi_iface_attr_is_visible,
682};
683
684
685static const struct {
686 enum iscsi_ipaddress_state value;
687 char *name;
688} iscsi_ipaddress_state_names[] = {
689 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
690 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
691 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
692 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
693 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
694 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
695 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
696};
697
698char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
699{
700 int i;
701 char *state = NULL;
702
703 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
704 if (iscsi_ipaddress_state_names[i].value == port_state) {
705 state = iscsi_ipaddress_state_names[i].name;
706 break;
707 }
708 }
709 return state;
710}
711EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
712
713
714static const struct {
715 enum iscsi_router_state value;
716 char *name;
717} iscsi_router_state_names[] = {
718 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
719 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
720 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
721 {ISCSI_ROUTER_STATE_STALE, "Stale" },
722};
723
724char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
725{
726 int i;
727 char *state = NULL;
728
729 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
730 if (iscsi_router_state_names[i].value == router_state) {
731 state = iscsi_router_state_names[i].name;
732 break;
733 }
734 }
735 return state;
736}
737EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
738
739struct iscsi_iface *
740iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
741 uint32_t iface_type, uint32_t iface_num, int dd_size)
742{
743 struct iscsi_iface *iface;
744 int err;
745
746 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
747 if (!iface)
748 return NULL;
749
750 iface->transport = transport;
751 iface->iface_type = iface_type;
752 iface->iface_num = iface_num;
753 iface->dev.release = iscsi_iface_release;
754 iface->dev.class = &iscsi_iface_class;
755
756 iface->dev.parent = get_device(&shost->shost_gendev);
757 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
758 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
759 iface_num);
760 else
761 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
762 iface_num);
763
764 err = device_register(&iface->dev);
765 if (err)
766 goto free_iface;
767
768 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
769 if (err)
770 goto unreg_iface;
771
772 if (dd_size)
773 iface->dd_data = &iface[1];
774 return iface;
775
776unreg_iface:
777 device_unregister(&iface->dev);
778 return NULL;
779
780free_iface:
781 put_device(iface->dev.parent);
782 kfree(iface);
783 return NULL;
784}
785EXPORT_SYMBOL_GPL(iscsi_create_iface);
786
787void iscsi_destroy_iface(struct iscsi_iface *iface)
788{
789 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
790 device_unregister(&iface->dev);
791}
792EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
793
794
795
796
797
798#define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
799struct device_attribute dev_attr_##_prefix##_##_name = \
800 __ATTR(_name, _mode, _show, _store)
801
802
803#define iscsi_flashnode_sess_attr_show(type, name, param) \
804static ssize_t \
805show_##type##_##name(struct device *dev, struct device_attribute *attr, \
806 char *buf) \
807{ \
808 struct iscsi_bus_flash_session *fnode_sess = \
809 iscsi_dev_to_flash_session(dev);\
810 struct iscsi_transport *t = fnode_sess->transport; \
811 return t->get_flashnode_param(fnode_sess, param, buf); \
812} \
813
814
815#define iscsi_flashnode_sess_attr(type, name, param) \
816 iscsi_flashnode_sess_attr_show(type, name, param) \
817static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
818 show_##type##_##name, NULL);
819
820
821
822iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
823 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
824iscsi_flashnode_sess_attr(fnode, discovery_session,
825 ISCSI_FLASHNODE_DISCOVERY_SESS);
826iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
827iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
828iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
829iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
830iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
831 ISCSI_FLASHNODE_DATASEQ_INORDER);
832iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
833 ISCSI_FLASHNODE_PDU_INORDER);
834iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
835iscsi_flashnode_sess_attr(fnode, discovery_logout,
836 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
837iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
838iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
839 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
840iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
841iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
842iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
843iscsi_flashnode_sess_attr(fnode, def_time2retain,
844 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
845iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
846iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
847iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
848iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
849iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
850 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
851iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
852iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
853iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
854iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
855 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
856iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
857 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
858iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
859iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
860iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
861iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
862iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
863iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
864iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
865
866static struct attribute *iscsi_flashnode_sess_attrs[] = {
867 &dev_attr_fnode_auto_snd_tgt_disable.attr,
868 &dev_attr_fnode_discovery_session.attr,
869 &dev_attr_fnode_portal_type.attr,
870 &dev_attr_fnode_entry_enable.attr,
871 &dev_attr_fnode_immediate_data.attr,
872 &dev_attr_fnode_initial_r2t.attr,
873 &dev_attr_fnode_data_seq_in_order.attr,
874 &dev_attr_fnode_data_pdu_in_order.attr,
875 &dev_attr_fnode_chap_auth.attr,
876 &dev_attr_fnode_discovery_logout.attr,
877 &dev_attr_fnode_bidi_chap.attr,
878 &dev_attr_fnode_discovery_auth_optional.attr,
879 &dev_attr_fnode_erl.attr,
880 &dev_attr_fnode_first_burst_len.attr,
881 &dev_attr_fnode_def_time2wait.attr,
882 &dev_attr_fnode_def_time2retain.attr,
883 &dev_attr_fnode_max_outstanding_r2t.attr,
884 &dev_attr_fnode_isid.attr,
885 &dev_attr_fnode_tsid.attr,
886 &dev_attr_fnode_max_burst_len.attr,
887 &dev_attr_fnode_def_taskmgmt_tmo.attr,
888 &dev_attr_fnode_targetalias.attr,
889 &dev_attr_fnode_targetname.attr,
890 &dev_attr_fnode_tpgt.attr,
891 &dev_attr_fnode_discovery_parent_idx.attr,
892 &dev_attr_fnode_discovery_parent_type.attr,
893 &dev_attr_fnode_chap_in_idx.attr,
894 &dev_attr_fnode_chap_out_idx.attr,
895 &dev_attr_fnode_username.attr,
896 &dev_attr_fnode_username_in.attr,
897 &dev_attr_fnode_password.attr,
898 &dev_attr_fnode_password_in.attr,
899 &dev_attr_fnode_is_boot_target.attr,
900 NULL,
901};
902
903static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
904 struct attribute *attr,
905 int i)
906{
907 struct device *dev = container_of(kobj, struct device, kobj);
908 struct iscsi_bus_flash_session *fnode_sess =
909 iscsi_dev_to_flash_session(dev);
910 struct iscsi_transport *t = fnode_sess->transport;
911 int param;
912
913 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
914 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
915 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
916 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
917 } else if (attr == &dev_attr_fnode_portal_type.attr) {
918 param = ISCSI_FLASHNODE_PORTAL_TYPE;
919 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
920 param = ISCSI_FLASHNODE_ENTRY_EN;
921 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
922 param = ISCSI_FLASHNODE_IMM_DATA_EN;
923 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
924 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
925 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
926 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
927 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
928 param = ISCSI_FLASHNODE_PDU_INORDER;
929 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
930 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
931 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
932 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
933 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
934 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
935 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
936 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
937 } else if (attr == &dev_attr_fnode_erl.attr) {
938 param = ISCSI_FLASHNODE_ERL;
939 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
940 param = ISCSI_FLASHNODE_FIRST_BURST;
941 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
942 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
943 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
944 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
945 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
946 param = ISCSI_FLASHNODE_MAX_R2T;
947 } else if (attr == &dev_attr_fnode_isid.attr) {
948 param = ISCSI_FLASHNODE_ISID;
949 } else if (attr == &dev_attr_fnode_tsid.attr) {
950 param = ISCSI_FLASHNODE_TSID;
951 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
952 param = ISCSI_FLASHNODE_MAX_BURST;
953 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
954 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
955 } else if (attr == &dev_attr_fnode_targetalias.attr) {
956 param = ISCSI_FLASHNODE_ALIAS;
957 } else if (attr == &dev_attr_fnode_targetname.attr) {
958 param = ISCSI_FLASHNODE_NAME;
959 } else if (attr == &dev_attr_fnode_tpgt.attr) {
960 param = ISCSI_FLASHNODE_TPGT;
961 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
962 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
963 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
964 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
965 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
966 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
967 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
968 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
969 } else if (attr == &dev_attr_fnode_username.attr) {
970 param = ISCSI_FLASHNODE_USERNAME;
971 } else if (attr == &dev_attr_fnode_username_in.attr) {
972 param = ISCSI_FLASHNODE_USERNAME_IN;
973 } else if (attr == &dev_attr_fnode_password.attr) {
974 param = ISCSI_FLASHNODE_PASSWORD;
975 } else if (attr == &dev_attr_fnode_password_in.attr) {
976 param = ISCSI_FLASHNODE_PASSWORD_IN;
977 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
978 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
979 } else {
980 WARN_ONCE(1, "Invalid flashnode session attr");
981 return 0;
982 }
983
984 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
985}
986
987static struct attribute_group iscsi_flashnode_sess_attr_group = {
988 .attrs = iscsi_flashnode_sess_attrs,
989 .is_visible = iscsi_flashnode_sess_attr_is_visible,
990};
991
992static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
993 &iscsi_flashnode_sess_attr_group,
994 NULL,
995};
996
997static void iscsi_flashnode_sess_release(struct device *dev)
998{
999 struct iscsi_bus_flash_session *fnode_sess =
1000 iscsi_dev_to_flash_session(dev);
1001
1002 kfree(fnode_sess->targetname);
1003 kfree(fnode_sess->targetalias);
1004 kfree(fnode_sess->portal_type);
1005 kfree(fnode_sess);
1006}
1007
1008static const struct device_type iscsi_flashnode_sess_dev_type = {
1009 .name = "iscsi_flashnode_sess_dev_type",
1010 .groups = iscsi_flashnode_sess_attr_groups,
1011 .release = iscsi_flashnode_sess_release,
1012};
1013
1014
1015#define iscsi_flashnode_conn_attr_show(type, name, param) \
1016static ssize_t \
1017show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1018 char *buf) \
1019{ \
1020 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1021 struct iscsi_bus_flash_session *fnode_sess = \
1022 iscsi_flash_conn_to_flash_session(fnode_conn);\
1023 struct iscsi_transport *t = fnode_conn->transport; \
1024 return t->get_flashnode_param(fnode_sess, param, buf); \
1025} \
1026
1027
1028#define iscsi_flashnode_conn_attr(type, name, param) \
1029 iscsi_flashnode_conn_attr_show(type, name, param) \
1030static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1031 show_##type##_##name, NULL);
1032
1033
1034
1035iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1036 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1037iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1038iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1039iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1040iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1041 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1042iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1043 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1044iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1045 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1046iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1047 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1048iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1049 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1050iscsi_flashnode_conn_attr(fnode, fragment_disable,
1051 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1052iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1053iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1054iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1055iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1056 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1057iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1058 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1059iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1060iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1061iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1062iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1063 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1064iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1065 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1066iscsi_flashnode_conn_attr(fnode, max_segment_size,
1067 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1068iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1069 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1070iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1071iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1072iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1073iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1074
1075static struct attribute *iscsi_flashnode_conn_attrs[] = {
1076 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1077 &dev_attr_fnode_header_digest.attr,
1078 &dev_attr_fnode_data_digest.attr,
1079 &dev_attr_fnode_snack_req.attr,
1080 &dev_attr_fnode_tcp_timestamp_stat.attr,
1081 &dev_attr_fnode_tcp_nagle_disable.attr,
1082 &dev_attr_fnode_tcp_wsf_disable.attr,
1083 &dev_attr_fnode_tcp_timer_scale.attr,
1084 &dev_attr_fnode_tcp_timestamp_enable.attr,
1085 &dev_attr_fnode_fragment_disable.attr,
1086 &dev_attr_fnode_max_recv_dlength.attr,
1087 &dev_attr_fnode_max_xmit_dlength.attr,
1088 &dev_attr_fnode_keepalive_tmo.attr,
1089 &dev_attr_fnode_port.attr,
1090 &dev_attr_fnode_ipaddress.attr,
1091 &dev_attr_fnode_redirect_ipaddr.attr,
1092 &dev_attr_fnode_max_segment_size.attr,
1093 &dev_attr_fnode_local_port.attr,
1094 &dev_attr_fnode_ipv4_tos.attr,
1095 &dev_attr_fnode_ipv6_traffic_class.attr,
1096 &dev_attr_fnode_ipv6_flow_label.attr,
1097 &dev_attr_fnode_link_local_ipv6.attr,
1098 &dev_attr_fnode_tcp_xmit_wsf.attr,
1099 &dev_attr_fnode_tcp_recv_wsf.attr,
1100 &dev_attr_fnode_statsn.attr,
1101 &dev_attr_fnode_exp_statsn.attr,
1102 NULL,
1103};
1104
1105static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1106 struct attribute *attr,
1107 int i)
1108{
1109 struct device *dev = container_of(kobj, struct device, kobj);
1110 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1111 struct iscsi_transport *t = fnode_conn->transport;
1112 int param;
1113
1114 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1115 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1116 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1117 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1118 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1119 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1120 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1121 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1122 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1123 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1124 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1125 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1126 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1127 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1128 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1129 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1130 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1131 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1132 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1133 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1134 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1135 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1136 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1137 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1138 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1139 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1140 } else if (attr == &dev_attr_fnode_port.attr) {
1141 param = ISCSI_FLASHNODE_PORT;
1142 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1143 param = ISCSI_FLASHNODE_IPADDR;
1144 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1145 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1146 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1147 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1148 } else if (attr == &dev_attr_fnode_local_port.attr) {
1149 param = ISCSI_FLASHNODE_LOCAL_PORT;
1150 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1151 param = ISCSI_FLASHNODE_IPV4_TOS;
1152 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1153 param = ISCSI_FLASHNODE_IPV6_TC;
1154 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1155 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1156 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1157 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1158 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1159 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1160 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1161 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1162 } else if (attr == &dev_attr_fnode_statsn.attr) {
1163 param = ISCSI_FLASHNODE_STATSN;
1164 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1165 param = ISCSI_FLASHNODE_EXP_STATSN;
1166 } else {
1167 WARN_ONCE(1, "Invalid flashnode connection attr");
1168 return 0;
1169 }
1170
1171 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1172}
1173
1174static struct attribute_group iscsi_flashnode_conn_attr_group = {
1175 .attrs = iscsi_flashnode_conn_attrs,
1176 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1177};
1178
1179static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1180 &iscsi_flashnode_conn_attr_group,
1181 NULL,
1182};
1183
1184static void iscsi_flashnode_conn_release(struct device *dev)
1185{
1186 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1187
1188 kfree(fnode_conn->ipaddress);
1189 kfree(fnode_conn->redirect_ipaddr);
1190 kfree(fnode_conn->link_local_ipv6_addr);
1191 kfree(fnode_conn);
1192}
1193
1194static const struct device_type iscsi_flashnode_conn_dev_type = {
1195 .name = "iscsi_flashnode_conn_dev_type",
1196 .groups = iscsi_flashnode_conn_attr_groups,
1197 .release = iscsi_flashnode_conn_release,
1198};
1199
1200static struct bus_type iscsi_flashnode_bus;
1201
1202int iscsi_flashnode_bus_match(struct device *dev,
1203 struct device_driver *drv)
1204{
1205 if (dev->bus == &iscsi_flashnode_bus)
1206 return 1;
1207 return 0;
1208}
1209EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1210
1211static struct bus_type iscsi_flashnode_bus = {
1212 .name = "iscsi_flashnode",
1213 .match = &iscsi_flashnode_bus_match,
1214};
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229struct iscsi_bus_flash_session *
1230iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1231 struct iscsi_transport *transport,
1232 int dd_size)
1233{
1234 struct iscsi_bus_flash_session *fnode_sess;
1235 int err;
1236
1237 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1238 if (!fnode_sess)
1239 return NULL;
1240
1241 fnode_sess->transport = transport;
1242 fnode_sess->target_id = index;
1243 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1244 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1245 fnode_sess->dev.parent = &shost->shost_gendev;
1246 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1247 shost->host_no, index);
1248
1249 err = device_register(&fnode_sess->dev);
1250 if (err)
1251 goto free_fnode_sess;
1252
1253 if (dd_size)
1254 fnode_sess->dd_data = &fnode_sess[1];
1255
1256 return fnode_sess;
1257
1258free_fnode_sess:
1259 kfree(fnode_sess);
1260 return NULL;
1261}
1262EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277struct iscsi_bus_flash_conn *
1278iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1279 struct iscsi_bus_flash_session *fnode_sess,
1280 struct iscsi_transport *transport,
1281 int dd_size)
1282{
1283 struct iscsi_bus_flash_conn *fnode_conn;
1284 int err;
1285
1286 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1287 if (!fnode_conn)
1288 return NULL;
1289
1290 fnode_conn->transport = transport;
1291 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1292 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1293 fnode_conn->dev.parent = &fnode_sess->dev;
1294 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1295 shost->host_no, fnode_sess->target_id);
1296
1297 err = device_register(&fnode_conn->dev);
1298 if (err)
1299 goto free_fnode_conn;
1300
1301 if (dd_size)
1302 fnode_conn->dd_data = &fnode_conn[1];
1303
1304 return fnode_conn;
1305
1306free_fnode_conn:
1307 kfree(fnode_conn);
1308 return NULL;
1309}
1310EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1324{
1325 return dev->bus == &iscsi_flashnode_bus;
1326}
1327
1328static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1329{
1330 device_unregister(&fnode_conn->dev);
1331 return 0;
1332}
1333
1334static int flashnode_match_index(struct device *dev, void *data)
1335{
1336 struct iscsi_bus_flash_session *fnode_sess = NULL;
1337 int ret = 0;
1338
1339 if (!iscsi_flashnode_bus_match(dev, NULL))
1340 goto exit_match_index;
1341
1342 fnode_sess = iscsi_dev_to_flash_session(dev);
1343 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1344
1345exit_match_index:
1346 return ret;
1347}
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360static struct iscsi_bus_flash_session *
1361iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1362{
1363 struct iscsi_bus_flash_session *fnode_sess = NULL;
1364 struct device *dev;
1365
1366 dev = device_find_child(&shost->shost_gendev, &idx,
1367 flashnode_match_index);
1368 if (dev)
1369 fnode_sess = iscsi_dev_to_flash_session(dev);
1370
1371 return fnode_sess;
1372}
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387struct device *
1388iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1389 int (*fn)(struct device *dev, void *data))
1390{
1391 return device_find_child(&shost->shost_gendev, data, fn);
1392}
1393EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406struct device *
1407iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1408{
1409 return device_find_child(&fnode_sess->dev, NULL,
1410 iscsi_is_flashnode_conn_dev);
1411}
1412EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1413
1414static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1415{
1416 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1417 return 0;
1418
1419 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1420}
1421
1422
1423
1424
1425
1426
1427
1428
1429void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1430{
1431 int err;
1432
1433 err = device_for_each_child(&fnode_sess->dev, NULL,
1434 iscsi_iter_destroy_flashnode_conn_fn);
1435 if (err)
1436 pr_err("Could not delete all connections for %s. Error %d.\n",
1437 fnode_sess->dev.kobj.name, err);
1438
1439 device_unregister(&fnode_sess->dev);
1440}
1441EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1442
1443static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1444{
1445 if (!iscsi_flashnode_bus_match(dev, NULL))
1446 return 0;
1447
1448 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1449 return 0;
1450}
1451
1452
1453
1454
1455
1456
1457
1458
1459void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1460{
1461 device_for_each_child(&shost->shost_gendev, NULL,
1462 iscsi_iter_destroy_flashnode_fn);
1463}
1464EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1465
1466
1467
1468
1469
1470
1471
1472
1473static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1474{
1475 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1476 struct iscsi_bsg_request *req = job->request;
1477 struct iscsi_bsg_reply *reply = job->reply;
1478 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1479 int cmdlen = sizeof(uint32_t);
1480 int ret;
1481
1482
1483 if (job->request_len < sizeof(uint32_t)) {
1484 ret = -ENOMSG;
1485 goto fail_host_msg;
1486 }
1487
1488
1489 switch (req->msgcode) {
1490 case ISCSI_BSG_HST_VENDOR:
1491 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1492 if ((shost->hostt->vendor_id == 0L) ||
1493 (req->rqst_data.h_vendor.vendor_id !=
1494 shost->hostt->vendor_id)) {
1495 ret = -ESRCH;
1496 goto fail_host_msg;
1497 }
1498 break;
1499 default:
1500 ret = -EBADR;
1501 goto fail_host_msg;
1502 }
1503
1504
1505 if (job->request_len < cmdlen) {
1506 ret = -ENOMSG;
1507 goto fail_host_msg;
1508 }
1509
1510 ret = i->iscsi_transport->bsg_request(job);
1511 if (!ret)
1512 return 0;
1513
1514fail_host_msg:
1515
1516 BUG_ON(job->reply_len < sizeof(uint32_t));
1517 reply->reply_payload_rcv_len = 0;
1518 reply->result = ret;
1519 job->reply_len = sizeof(uint32_t);
1520 bsg_job_done(job, ret, 0);
1521 return 0;
1522}
1523
1524
1525
1526
1527
1528
1529static int
1530iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1531{
1532 struct device *dev = &shost->shost_gendev;
1533 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1534 struct request_queue *q;
1535 char bsg_name[20];
1536
1537 if (!i->iscsi_transport->bsg_request)
1538 return -ENOTSUPP;
1539
1540 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1541 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1542 if (IS_ERR(q)) {
1543 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1544 "initialize - no request queue\n");
1545 return PTR_ERR(q);
1546 }
1547 __scsi_init_queue(shost, q);
1548
1549 ihost->bsg_q = q;
1550 return 0;
1551}
1552
1553static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1554 struct device *cdev)
1555{
1556 struct Scsi_Host *shost = dev_to_shost(dev);
1557 struct iscsi_cls_host *ihost = shost->shost_data;
1558
1559 memset(ihost, 0, sizeof(*ihost));
1560 atomic_set(&ihost->nr_scans, 0);
1561 mutex_init(&ihost->mutex);
1562
1563 iscsi_bsg_host_add(shost, ihost);
1564
1565
1566 return 0;
1567}
1568
1569static int iscsi_remove_host(struct transport_container *tc,
1570 struct device *dev, struct device *cdev)
1571{
1572 struct Scsi_Host *shost = dev_to_shost(dev);
1573 struct iscsi_cls_host *ihost = shost->shost_data;
1574
1575 bsg_remove_queue(ihost->bsg_q);
1576 return 0;
1577}
1578
1579static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1580 "iscsi_host",
1581 iscsi_setup_host,
1582 iscsi_remove_host,
1583 NULL);
1584
1585static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1586 "iscsi_session",
1587 NULL,
1588 NULL,
1589 NULL);
1590
1591static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1592 "iscsi_connection",
1593 NULL,
1594 NULL,
1595 NULL);
1596
1597static struct sock *nls;
1598static DEFINE_MUTEX(rx_queue_mutex);
1599
1600static LIST_HEAD(sesslist);
1601static DEFINE_SPINLOCK(sesslock);
1602static LIST_HEAD(connlist);
1603static LIST_HEAD(connlist_err);
1604static DEFINE_SPINLOCK(connlock);
1605
1606static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1607{
1608 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1609 return sess->sid;
1610}
1611
1612
1613
1614
1615static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1616{
1617 unsigned long flags;
1618 struct iscsi_cls_session *sess;
1619
1620 spin_lock_irqsave(&sesslock, flags);
1621 list_for_each_entry(sess, &sesslist, sess_list) {
1622 if (sess->sid == sid) {
1623 spin_unlock_irqrestore(&sesslock, flags);
1624 return sess;
1625 }
1626 }
1627 spin_unlock_irqrestore(&sesslock, flags);
1628 return NULL;
1629}
1630
1631
1632
1633
1634static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1635{
1636 unsigned long flags;
1637 struct iscsi_cls_conn *conn;
1638
1639 spin_lock_irqsave(&connlock, flags);
1640 list_for_each_entry(conn, &connlist, conn_list) {
1641 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1642 spin_unlock_irqrestore(&connlock, flags);
1643 return conn;
1644 }
1645 }
1646 spin_unlock_irqrestore(&connlock, flags);
1647 return NULL;
1648}
1649
1650
1651
1652
1653
1654static struct {
1655 int value;
1656 char *name;
1657} iscsi_session_state_names[] = {
1658 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1659 { ISCSI_SESSION_FAILED, "FAILED" },
1660 { ISCSI_SESSION_FREE, "FREE" },
1661};
1662
1663static const char *iscsi_session_state_name(int state)
1664{
1665 int i;
1666 char *name = NULL;
1667
1668 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1669 if (iscsi_session_state_names[i].value == state) {
1670 name = iscsi_session_state_names[i].name;
1671 break;
1672 }
1673 }
1674 return name;
1675}
1676
1677int iscsi_session_chkready(struct iscsi_cls_session *session)
1678{
1679 int err;
1680
1681 switch (session->state) {
1682 case ISCSI_SESSION_LOGGED_IN:
1683 err = 0;
1684 break;
1685 case ISCSI_SESSION_FAILED:
1686 err = DID_IMM_RETRY << 16;
1687 break;
1688 case ISCSI_SESSION_FREE:
1689 err = DID_TRANSPORT_FAILFAST << 16;
1690 break;
1691 default:
1692 err = DID_NO_CONNECT << 16;
1693 break;
1694 }
1695 return err;
1696}
1697EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1698
1699int iscsi_is_session_online(struct iscsi_cls_session *session)
1700{
1701 unsigned long flags;
1702 int ret = 0;
1703
1704 spin_lock_irqsave(&session->lock, flags);
1705 if (session->state == ISCSI_SESSION_LOGGED_IN)
1706 ret = 1;
1707 spin_unlock_irqrestore(&session->lock, flags);
1708 return ret;
1709}
1710EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1711
1712static void iscsi_session_release(struct device *dev)
1713{
1714 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1715 struct Scsi_Host *shost;
1716
1717 shost = iscsi_session_to_shost(session);
1718 scsi_host_put(shost);
1719 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1720 kfree(session);
1721}
1722
1723int iscsi_is_session_dev(const struct device *dev)
1724{
1725 return dev->release == iscsi_session_release;
1726}
1727EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1728
1729static int iscsi_iter_session_fn(struct device *dev, void *data)
1730{
1731 void (* fn) (struct iscsi_cls_session *) = data;
1732
1733 if (!iscsi_is_session_dev(dev))
1734 return 0;
1735 fn(iscsi_dev_to_session(dev));
1736 return 0;
1737}
1738
1739void iscsi_host_for_each_session(struct Scsi_Host *shost,
1740 void (*fn)(struct iscsi_cls_session *))
1741{
1742 device_for_each_child(&shost->shost_gendev, fn,
1743 iscsi_iter_session_fn);
1744}
1745EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1756{
1757 struct iscsi_cls_host *ihost = shost->shost_data;
1758
1759
1760
1761
1762 return !atomic_read(&ihost->nr_scans);
1763}
1764EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1765
1766struct iscsi_scan_data {
1767 unsigned int channel;
1768 unsigned int id;
1769 u64 lun;
1770 enum scsi_scan_mode rescan;
1771};
1772
1773static int iscsi_user_scan_session(struct device *dev, void *data)
1774{
1775 struct iscsi_scan_data *scan_data = data;
1776 struct iscsi_cls_session *session;
1777 struct Scsi_Host *shost;
1778 struct iscsi_cls_host *ihost;
1779 unsigned long flags;
1780 unsigned int id;
1781
1782 if (!iscsi_is_session_dev(dev))
1783 return 0;
1784
1785 session = iscsi_dev_to_session(dev);
1786
1787 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1788
1789 shost = iscsi_session_to_shost(session);
1790 ihost = shost->shost_data;
1791
1792 mutex_lock(&ihost->mutex);
1793 spin_lock_irqsave(&session->lock, flags);
1794 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1795 spin_unlock_irqrestore(&session->lock, flags);
1796 goto user_scan_exit;
1797 }
1798 id = session->target_id;
1799 spin_unlock_irqrestore(&session->lock, flags);
1800
1801 if (id != ISCSI_MAX_TARGET) {
1802 if ((scan_data->channel == SCAN_WILD_CARD ||
1803 scan_data->channel == 0) &&
1804 (scan_data->id == SCAN_WILD_CARD ||
1805 scan_data->id == id))
1806 scsi_scan_target(&session->dev, 0, id,
1807 scan_data->lun, scan_data->rescan);
1808 }
1809
1810user_scan_exit:
1811 mutex_unlock(&ihost->mutex);
1812 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1813 return 0;
1814}
1815
1816static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1817 uint id, u64 lun)
1818{
1819 struct iscsi_scan_data scan_data;
1820
1821 scan_data.channel = channel;
1822 scan_data.id = id;
1823 scan_data.lun = lun;
1824 scan_data.rescan = SCSI_SCAN_MANUAL;
1825
1826 return device_for_each_child(&shost->shost_gendev, &scan_data,
1827 iscsi_user_scan_session);
1828}
1829
1830static void iscsi_scan_session(struct work_struct *work)
1831{
1832 struct iscsi_cls_session *session =
1833 container_of(work, struct iscsi_cls_session, scan_work);
1834 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1835 struct iscsi_cls_host *ihost = shost->shost_data;
1836 struct iscsi_scan_data scan_data;
1837
1838 scan_data.channel = 0;
1839 scan_data.id = SCAN_WILD_CARD;
1840 scan_data.lun = SCAN_WILD_CARD;
1841 scan_data.rescan = SCSI_SCAN_RESCAN;
1842
1843 iscsi_user_scan_session(&session->dev, &scan_data);
1844 atomic_dec(&ihost->nr_scans);
1845}
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1857{
1858 struct iscsi_cls_session *session =
1859 starget_to_session(scsi_target(cmd->device));
1860 unsigned long flags;
1861 int ret = 0;
1862
1863 spin_lock_irqsave(&session->lock, flags);
1864 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1865 if (session->state == ISCSI_SESSION_FREE) {
1866 ret = FAST_IO_FAIL;
1867 break;
1868 }
1869 spin_unlock_irqrestore(&session->lock, flags);
1870 msleep(1000);
1871 spin_lock_irqsave(&session->lock, flags);
1872 }
1873 spin_unlock_irqrestore(&session->lock, flags);
1874 return ret;
1875}
1876EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1877
1878static void session_recovery_timedout(struct work_struct *work)
1879{
1880 struct iscsi_cls_session *session =
1881 container_of(work, struct iscsi_cls_session,
1882 recovery_work.work);
1883 unsigned long flags;
1884
1885 iscsi_cls_session_printk(KERN_INFO, session,
1886 "session recovery timed out after %d secs\n",
1887 session->recovery_tmo);
1888
1889 spin_lock_irqsave(&session->lock, flags);
1890 switch (session->state) {
1891 case ISCSI_SESSION_FAILED:
1892 session->state = ISCSI_SESSION_FREE;
1893 break;
1894 case ISCSI_SESSION_LOGGED_IN:
1895 case ISCSI_SESSION_FREE:
1896
1897 spin_unlock_irqrestore(&session->lock, flags);
1898 return;
1899 }
1900 spin_unlock_irqrestore(&session->lock, flags);
1901
1902 if (session->transport->session_recovery_timedout)
1903 session->transport->session_recovery_timedout(session);
1904
1905 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1906 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1907 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1908}
1909
1910static void __iscsi_unblock_session(struct work_struct *work)
1911{
1912 struct iscsi_cls_session *session =
1913 container_of(work, struct iscsi_cls_session,
1914 unblock_work);
1915 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1916 struct iscsi_cls_host *ihost = shost->shost_data;
1917 unsigned long flags;
1918
1919 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1920
1921
1922
1923
1924 cancel_delayed_work(&session->recovery_work);
1925 spin_lock_irqsave(&session->lock, flags);
1926 session->state = ISCSI_SESSION_LOGGED_IN;
1927 spin_unlock_irqrestore(&session->lock, flags);
1928
1929 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1930
1931
1932
1933
1934
1935 if (shost->hostt->scan_finished) {
1936 if (scsi_queue_work(shost, &session->scan_work))
1937 atomic_inc(&ihost->nr_scans);
1938 }
1939 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1940}
1941
1942
1943
1944
1945
1946
1947
1948void iscsi_unblock_session(struct iscsi_cls_session *session)
1949{
1950 flush_work(&session->block_work);
1951
1952 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1953
1954
1955
1956
1957
1958 flush_work(&session->unblock_work);
1959}
1960EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1961
1962static void __iscsi_block_session(struct work_struct *work)
1963{
1964 struct iscsi_cls_session *session =
1965 container_of(work, struct iscsi_cls_session,
1966 block_work);
1967 unsigned long flags;
1968
1969 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1970 spin_lock_irqsave(&session->lock, flags);
1971 session->state = ISCSI_SESSION_FAILED;
1972 spin_unlock_irqrestore(&session->lock, flags);
1973 scsi_target_block(&session->dev);
1974 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1975 if (session->recovery_tmo >= 0)
1976 queue_delayed_work(iscsi_eh_timer_workq,
1977 &session->recovery_work,
1978 session->recovery_tmo * HZ);
1979}
1980
1981void iscsi_block_session(struct iscsi_cls_session *session)
1982{
1983 queue_work(iscsi_eh_timer_workq, &session->block_work);
1984}
1985EXPORT_SYMBOL_GPL(iscsi_block_session);
1986
1987static void __iscsi_unbind_session(struct work_struct *work)
1988{
1989 struct iscsi_cls_session *session =
1990 container_of(work, struct iscsi_cls_session,
1991 unbind_work);
1992 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1993 struct iscsi_cls_host *ihost = shost->shost_data;
1994 unsigned long flags;
1995 unsigned int target_id;
1996
1997 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
1998
1999
2000 mutex_lock(&ihost->mutex);
2001 spin_lock_irqsave(&session->lock, flags);
2002 if (session->target_id == ISCSI_MAX_TARGET) {
2003 spin_unlock_irqrestore(&session->lock, flags);
2004 mutex_unlock(&ihost->mutex);
2005 goto unbind_session_exit;
2006 }
2007
2008 target_id = session->target_id;
2009 session->target_id = ISCSI_MAX_TARGET;
2010 spin_unlock_irqrestore(&session->lock, flags);
2011 mutex_unlock(&ihost->mutex);
2012
2013 scsi_remove_target(&session->dev);
2014
2015 if (session->ida_used)
2016 ida_simple_remove(&iscsi_sess_ida, target_id);
2017
2018unbind_session_exit:
2019 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2020 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2021}
2022
2023static void __iscsi_destroy_session(struct work_struct *work)
2024{
2025 struct iscsi_cls_session *session =
2026 container_of(work, struct iscsi_cls_session, destroy_work);
2027
2028 session->transport->destroy_session(session);
2029}
2030
2031struct iscsi_cls_session *
2032iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2033 int dd_size)
2034{
2035 struct iscsi_cls_session *session;
2036
2037 session = kzalloc(sizeof(*session) + dd_size,
2038 GFP_KERNEL);
2039 if (!session)
2040 return NULL;
2041
2042 session->transport = transport;
2043 session->creator = -1;
2044 session->recovery_tmo = 120;
2045 session->recovery_tmo_sysfs_override = false;
2046 session->state = ISCSI_SESSION_FREE;
2047 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2048 INIT_LIST_HEAD(&session->sess_list);
2049 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2050 INIT_WORK(&session->block_work, __iscsi_block_session);
2051 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2052 INIT_WORK(&session->scan_work, iscsi_scan_session);
2053 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2054 spin_lock_init(&session->lock);
2055
2056
2057 scsi_host_get(shost);
2058 session->dev.parent = &shost->shost_gendev;
2059 session->dev.release = iscsi_session_release;
2060 device_initialize(&session->dev);
2061 if (dd_size)
2062 session->dd_data = &session[1];
2063
2064 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2065 return session;
2066}
2067EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2068
2069int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2070{
2071 unsigned long flags;
2072 int id = 0;
2073 int err;
2074
2075 session->sid = atomic_add_return(1, &iscsi_session_nr);
2076
2077 if (target_id == ISCSI_MAX_TARGET) {
2078 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2079
2080 if (id < 0) {
2081 iscsi_cls_session_printk(KERN_ERR, session,
2082 "Failure in Target ID Allocation\n");
2083 return id;
2084 }
2085 session->target_id = (unsigned int)id;
2086 session->ida_used = true;
2087 } else
2088 session->target_id = target_id;
2089
2090 dev_set_name(&session->dev, "session%u", session->sid);
2091 err = device_add(&session->dev);
2092 if (err) {
2093 iscsi_cls_session_printk(KERN_ERR, session,
2094 "could not register session's dev\n");
2095 goto release_ida;
2096 }
2097 err = transport_register_device(&session->dev);
2098 if (err) {
2099 iscsi_cls_session_printk(KERN_ERR, session,
2100 "could not register transport's dev\n");
2101 goto release_dev;
2102 }
2103
2104 spin_lock_irqsave(&sesslock, flags);
2105 list_add(&session->sess_list, &sesslist);
2106 spin_unlock_irqrestore(&sesslock, flags);
2107
2108 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2109 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2110 return 0;
2111
2112release_dev:
2113 device_del(&session->dev);
2114release_ida:
2115 if (session->ida_used)
2116 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2117
2118 return err;
2119}
2120EXPORT_SYMBOL_GPL(iscsi_add_session);
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131struct iscsi_cls_session *
2132iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2133 int dd_size, unsigned int target_id)
2134{
2135 struct iscsi_cls_session *session;
2136
2137 session = iscsi_alloc_session(shost, transport, dd_size);
2138 if (!session)
2139 return NULL;
2140
2141 if (iscsi_add_session(session, target_id)) {
2142 iscsi_free_session(session);
2143 return NULL;
2144 }
2145 return session;
2146}
2147EXPORT_SYMBOL_GPL(iscsi_create_session);
2148
2149static void iscsi_conn_release(struct device *dev)
2150{
2151 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2152 struct device *parent = conn->dev.parent;
2153
2154 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2155 kfree(conn);
2156 put_device(parent);
2157}
2158
2159static int iscsi_is_conn_dev(const struct device *dev)
2160{
2161 return dev->release == iscsi_conn_release;
2162}
2163
2164static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2165{
2166 if (!iscsi_is_conn_dev(dev))
2167 return 0;
2168 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2169}
2170
2171void iscsi_remove_session(struct iscsi_cls_session *session)
2172{
2173 unsigned long flags;
2174 int err;
2175
2176 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2177
2178 spin_lock_irqsave(&sesslock, flags);
2179 if (!list_empty(&session->sess_list))
2180 list_del(&session->sess_list);
2181 spin_unlock_irqrestore(&sesslock, flags);
2182
2183 flush_work(&session->block_work);
2184 flush_work(&session->unblock_work);
2185 cancel_delayed_work_sync(&session->recovery_work);
2186
2187
2188
2189
2190
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
2198 flush_work(&session->scan_work);
2199
2200 flush_work(&session->unbind_work);
2201 __iscsi_unbind_session(&session->unbind_work);
2202
2203
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}
2216EXPORT_SYMBOL_GPL(iscsi_remove_session);
2217
2218static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag)
2219{
2220 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n");
2221
2222 switch (flag) {
2223 case STOP_CONN_RECOVER:
2224 conn->state = ISCSI_CONN_FAILED;
2225 break;
2226 case STOP_CONN_TERM:
2227 conn->state = ISCSI_CONN_DOWN;
2228 break;
2229 default:
2230 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n",
2231 flag);
2232 return;
2233 }
2234
2235 conn->transport->stop_conn(conn, flag);
2236 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n");
2237}
2238
2239static int iscsi_if_stop_conn(struct iscsi_transport *transport,
2240 struct iscsi_uevent *ev)
2241{
2242 int flag = ev->u.stop_conn.flag;
2243 struct iscsi_cls_conn *conn;
2244
2245 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
2246 if (!conn)
2247 return -EINVAL;
2248
2249 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n");
2250
2251
2252
2253
2254
2255 if (flag == STOP_CONN_TERM) {
2256 cancel_work_sync(&conn->cleanup_work);
2257 iscsi_stop_conn(conn, flag);
2258 } else {
2259
2260
2261
2262 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
2263 iscsi_stop_conn(conn, flag);
2264 } else {
2265 ISCSI_DBG_TRANS_CONN(conn,
2266 "flush kernel conn cleanup.\n");
2267 flush_work(&conn->cleanup_work);
2268 }
2269
2270
2271
2272
2273 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags);
2274 }
2275 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n");
2276 return 0;
2277}
2278
2279static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active)
2280{
2281 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2282 struct iscsi_endpoint *ep;
2283
2284 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n");
2285 conn->state = ISCSI_CONN_FAILED;
2286
2287 if (!conn->ep || !session->transport->ep_disconnect)
2288 return;
2289
2290 ep = conn->ep;
2291 conn->ep = NULL;
2292
2293 session->transport->unbind_conn(conn, is_active);
2294 session->transport->ep_disconnect(ep);
2295 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n");
2296}
2297
2298static void iscsi_cleanup_conn_work_fn(struct work_struct *work)
2299{
2300 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn,
2301 cleanup_work);
2302 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2303
2304 mutex_lock(&conn->ep_mutex);
2305
2306
2307
2308
2309
2310
2311 if (conn->state != ISCSI_CONN_BOUND && conn->state != ISCSI_CONN_UP) {
2312 ISCSI_DBG_TRANS_CONN(conn, "Got error while conn is already failed. Ignoring.\n");
2313 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags);
2314 mutex_unlock(&conn->ep_mutex);
2315 return;
2316 }
2317
2318 iscsi_ep_disconnect(conn, false);
2319
2320 if (system_state != SYSTEM_RUNNING) {
2321
2322
2323
2324
2325
2326 if (session->recovery_tmo > 0)
2327 session->recovery_tmo = 0;
2328 }
2329
2330 iscsi_stop_conn(conn, STOP_CONN_RECOVER);
2331 mutex_unlock(&conn->ep_mutex);
2332 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n");
2333}
2334
2335void iscsi_free_session(struct iscsi_cls_session *session)
2336{
2337 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2338 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2339 put_device(&session->dev);
2340}
2341EXPORT_SYMBOL_GPL(iscsi_free_session);
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358struct iscsi_cls_conn *
2359iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2360{
2361 struct iscsi_transport *transport = session->transport;
2362 struct iscsi_cls_conn *conn;
2363 unsigned long flags;
2364 int err;
2365
2366 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2367 if (!conn)
2368 return NULL;
2369 if (dd_size)
2370 conn->dd_data = &conn[1];
2371
2372 mutex_init(&conn->ep_mutex);
2373 INIT_LIST_HEAD(&conn->conn_list);
2374 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn);
2375 conn->transport = transport;
2376 conn->cid = cid;
2377 conn->state = ISCSI_CONN_DOWN;
2378
2379
2380 if (!get_device(&session->dev))
2381 goto free_conn;
2382
2383 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2384 conn->dev.parent = &session->dev;
2385 conn->dev.release = iscsi_conn_release;
2386 err = device_register(&conn->dev);
2387 if (err) {
2388 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2389 "register connection's dev\n");
2390 goto release_parent_ref;
2391 }
2392 err = transport_register_device(&conn->dev);
2393 if (err) {
2394 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2395 "register transport's dev\n");
2396 goto release_conn_ref;
2397 }
2398
2399 spin_lock_irqsave(&connlock, flags);
2400 list_add(&conn->conn_list, &connlist);
2401 spin_unlock_irqrestore(&connlock, flags);
2402
2403 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2404 return conn;
2405
2406release_conn_ref:
2407 device_unregister(&conn->dev);
2408 put_device(&session->dev);
2409 return NULL;
2410release_parent_ref:
2411 put_device(&session->dev);
2412free_conn:
2413 kfree(conn);
2414 return NULL;
2415}
2416
2417EXPORT_SYMBOL_GPL(iscsi_create_conn);
2418
2419
2420
2421
2422
2423
2424
2425int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2426{
2427 unsigned long flags;
2428
2429 spin_lock_irqsave(&connlock, flags);
2430 list_del(&conn->conn_list);
2431 spin_unlock_irqrestore(&connlock, flags);
2432
2433 transport_unregister_device(&conn->dev);
2434 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2435 device_unregister(&conn->dev);
2436 return 0;
2437}
2438EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2439
2440void iscsi_put_conn(struct iscsi_cls_conn *conn)
2441{
2442 put_device(&conn->dev);
2443}
2444EXPORT_SYMBOL_GPL(iscsi_put_conn);
2445
2446void iscsi_get_conn(struct iscsi_cls_conn *conn)
2447{
2448 get_device(&conn->dev);
2449}
2450EXPORT_SYMBOL_GPL(iscsi_get_conn);
2451
2452
2453
2454
2455static struct iscsi_internal *
2456iscsi_if_transport_lookup(struct iscsi_transport *tt)
2457{
2458 struct iscsi_internal *priv;
2459 unsigned long flags;
2460
2461 spin_lock_irqsave(&iscsi_transport_lock, flags);
2462 list_for_each_entry(priv, &iscsi_transports, list) {
2463 if (tt == priv->iscsi_transport) {
2464 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2465 return priv;
2466 }
2467 }
2468 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2469 return NULL;
2470}
2471
2472static int
2473iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2474{
2475 return nlmsg_multicast(nls, skb, 0, group, gfp);
2476}
2477
2478static int
2479iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2480{
2481 return nlmsg_unicast(nls, skb, portid);
2482}
2483
2484int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2485 char *data, uint32_t data_size)
2486{
2487 struct nlmsghdr *nlh;
2488 struct sk_buff *skb;
2489 struct iscsi_uevent *ev;
2490 char *pdu;
2491 struct iscsi_internal *priv;
2492 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2493 data_size);
2494
2495 priv = iscsi_if_transport_lookup(conn->transport);
2496 if (!priv)
2497 return -EINVAL;
2498
2499 skb = alloc_skb(len, GFP_ATOMIC);
2500 if (!skb) {
2501 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2502 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2503 "control PDU: OOM\n");
2504 return -ENOMEM;
2505 }
2506
2507 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2508 ev = nlmsg_data(nlh);
2509 memset(ev, 0, sizeof(*ev));
2510 ev->transport_handle = iscsi_handle(conn->transport);
2511 ev->type = ISCSI_KEVENT_RECV_PDU;
2512 ev->r.recv_req.cid = conn->cid;
2513 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2514 pdu = (char*)ev + sizeof(*ev);
2515 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2516 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2517
2518 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2519}
2520EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2521
2522int iscsi_offload_mesg(struct Scsi_Host *shost,
2523 struct iscsi_transport *transport, uint32_t type,
2524 char *data, uint16_t data_size)
2525{
2526 struct nlmsghdr *nlh;
2527 struct sk_buff *skb;
2528 struct iscsi_uevent *ev;
2529 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2530
2531 skb = alloc_skb(len, GFP_ATOMIC);
2532 if (!skb) {
2533 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2534 return -ENOMEM;
2535 }
2536
2537 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2538 ev = nlmsg_data(nlh);
2539 memset(ev, 0, sizeof(*ev));
2540 ev->type = type;
2541 ev->transport_handle = iscsi_handle(transport);
2542 switch (type) {
2543 case ISCSI_KEVENT_PATH_REQ:
2544 ev->r.req_path.host_no = shost->host_no;
2545 break;
2546 case ISCSI_KEVENT_IF_DOWN:
2547 ev->r.notify_if_down.host_no = shost->host_no;
2548 break;
2549 }
2550
2551 memcpy((char *)ev + sizeof(*ev), data, data_size);
2552
2553 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2554}
2555EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2556
2557void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2558{
2559 struct nlmsghdr *nlh;
2560 struct sk_buff *skb;
2561 struct iscsi_uevent *ev;
2562 struct iscsi_internal *priv;
2563 int len = nlmsg_total_size(sizeof(*ev));
2564
2565 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags))
2566 queue_work(iscsi_conn_cleanup_workq, &conn->cleanup_work);
2567
2568 priv = iscsi_if_transport_lookup(conn->transport);
2569 if (!priv)
2570 return;
2571
2572 skb = alloc_skb(len, GFP_ATOMIC);
2573 if (!skb) {
2574 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2575 "conn error (%d)\n", error);
2576 return;
2577 }
2578
2579 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2580 ev = nlmsg_data(nlh);
2581 ev->transport_handle = iscsi_handle(conn->transport);
2582 ev->type = ISCSI_KEVENT_CONN_ERROR;
2583 ev->r.connerror.error = error;
2584 ev->r.connerror.cid = conn->cid;
2585 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2586
2587 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2588
2589 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2590 error);
2591}
2592EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2593
2594void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2595 enum iscsi_conn_state state)
2596{
2597 struct nlmsghdr *nlh;
2598 struct sk_buff *skb;
2599 struct iscsi_uevent *ev;
2600 struct iscsi_internal *priv;
2601 int len = nlmsg_total_size(sizeof(*ev));
2602
2603 priv = iscsi_if_transport_lookup(conn->transport);
2604 if (!priv)
2605 return;
2606
2607 skb = alloc_skb(len, GFP_ATOMIC);
2608 if (!skb) {
2609 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2610 "conn login (%d)\n", state);
2611 return;
2612 }
2613
2614 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2615 ev = nlmsg_data(nlh);
2616 ev->transport_handle = iscsi_handle(conn->transport);
2617 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2618 ev->r.conn_login.state = state;
2619 ev->r.conn_login.cid = conn->cid;
2620 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2621 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2622
2623 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2624 state);
2625}
2626EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2627
2628void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2629 enum iscsi_host_event_code code, uint32_t data_size,
2630 uint8_t *data)
2631{
2632 struct nlmsghdr *nlh;
2633 struct sk_buff *skb;
2634 struct iscsi_uevent *ev;
2635 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2636
2637 skb = alloc_skb(len, GFP_NOIO);
2638 if (!skb) {
2639 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2640 host_no, code);
2641 return;
2642 }
2643
2644 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2645 ev = nlmsg_data(nlh);
2646 ev->transport_handle = iscsi_handle(transport);
2647 ev->type = ISCSI_KEVENT_HOST_EVENT;
2648 ev->r.host_event.host_no = host_no;
2649 ev->r.host_event.code = code;
2650 ev->r.host_event.data_size = data_size;
2651
2652 if (data_size)
2653 memcpy((char *)ev + sizeof(*ev), data, data_size);
2654
2655 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2656}
2657EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2658
2659void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2660 uint32_t status, uint32_t pid, uint32_t data_size,
2661 uint8_t *data)
2662{
2663 struct nlmsghdr *nlh;
2664 struct sk_buff *skb;
2665 struct iscsi_uevent *ev;
2666 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2667
2668 skb = alloc_skb(len, GFP_NOIO);
2669 if (!skb) {
2670 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2671 return;
2672 }
2673
2674 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2675 ev = nlmsg_data(nlh);
2676 ev->transport_handle = iscsi_handle(transport);
2677 ev->type = ISCSI_KEVENT_PING_COMP;
2678 ev->r.ping_comp.host_no = host_no;
2679 ev->r.ping_comp.status = status;
2680 ev->r.ping_comp.pid = pid;
2681 ev->r.ping_comp.data_size = data_size;
2682 memcpy((char *)ev + sizeof(*ev), data, data_size);
2683
2684 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2685}
2686EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2687
2688static int
2689iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2690{
2691 struct sk_buff *skb;
2692 struct nlmsghdr *nlh;
2693 int len = nlmsg_total_size(size);
2694
2695 skb = alloc_skb(len, GFP_ATOMIC);
2696 if (!skb) {
2697 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2698 return -ENOMEM;
2699 }
2700
2701 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2702 memcpy(nlmsg_data(nlh), payload, size);
2703 return iscsi_unicast_skb(skb, portid);
2704}
2705
2706static int
2707iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2708{
2709 struct iscsi_uevent *ev = nlmsg_data(nlh);
2710 struct iscsi_stats *stats;
2711 struct sk_buff *skbstat;
2712 struct iscsi_cls_conn *conn;
2713 struct nlmsghdr *nlhstat;
2714 struct iscsi_uevent *evstat;
2715 struct iscsi_internal *priv;
2716 int len = nlmsg_total_size(sizeof(*ev) +
2717 sizeof(struct iscsi_stats) +
2718 sizeof(struct iscsi_stats_custom) *
2719 ISCSI_STATS_CUSTOM_MAX);
2720 int err = 0;
2721
2722 priv = iscsi_if_transport_lookup(transport);
2723 if (!priv)
2724 return -EINVAL;
2725
2726 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2727 if (!conn)
2728 return -EEXIST;
2729
2730 do {
2731 int actual_size;
2732
2733 skbstat = alloc_skb(len, GFP_ATOMIC);
2734 if (!skbstat) {
2735 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2736 "deliver stats: OOM\n");
2737 return -ENOMEM;
2738 }
2739
2740 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2741 (len - sizeof(*nlhstat)), 0);
2742 evstat = nlmsg_data(nlhstat);
2743 memset(evstat, 0, sizeof(*evstat));
2744 evstat->transport_handle = iscsi_handle(conn->transport);
2745 evstat->type = nlh->nlmsg_type;
2746 evstat->u.get_stats.cid =
2747 ev->u.get_stats.cid;
2748 evstat->u.get_stats.sid =
2749 ev->u.get_stats.sid;
2750 stats = (struct iscsi_stats *)
2751 ((char*)evstat + sizeof(*evstat));
2752 memset(stats, 0, sizeof(*stats));
2753
2754 transport->get_stats(conn, stats);
2755 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2756 sizeof(struct iscsi_stats) +
2757 sizeof(struct iscsi_stats_custom) *
2758 stats->custom_length);
2759 actual_size -= sizeof(*nlhstat);
2760 actual_size = nlmsg_msg_size(actual_size);
2761 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2762 nlhstat->nlmsg_len = actual_size;
2763
2764 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2765 GFP_ATOMIC);
2766 } while (err < 0 && err != -ECONNREFUSED);
2767
2768 return err;
2769}
2770
2771
2772
2773
2774
2775
2776int iscsi_session_event(struct iscsi_cls_session *session,
2777 enum iscsi_uevent_e event)
2778{
2779 struct iscsi_internal *priv;
2780 struct Scsi_Host *shost;
2781 struct iscsi_uevent *ev;
2782 struct sk_buff *skb;
2783 struct nlmsghdr *nlh;
2784 int rc, len = nlmsg_total_size(sizeof(*ev));
2785
2786 priv = iscsi_if_transport_lookup(session->transport);
2787 if (!priv)
2788 return -EINVAL;
2789 shost = iscsi_session_to_shost(session);
2790
2791 skb = alloc_skb(len, GFP_KERNEL);
2792 if (!skb) {
2793 iscsi_cls_session_printk(KERN_ERR, session,
2794 "Cannot notify userspace of session "
2795 "event %u\n", event);
2796 return -ENOMEM;
2797 }
2798
2799 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2800 ev = nlmsg_data(nlh);
2801 ev->transport_handle = iscsi_handle(session->transport);
2802
2803 ev->type = event;
2804 switch (event) {
2805 case ISCSI_KEVENT_DESTROY_SESSION:
2806 ev->r.d_session.host_no = shost->host_no;
2807 ev->r.d_session.sid = session->sid;
2808 break;
2809 case ISCSI_KEVENT_CREATE_SESSION:
2810 ev->r.c_session_ret.host_no = shost->host_no;
2811 ev->r.c_session_ret.sid = session->sid;
2812 break;
2813 case ISCSI_KEVENT_UNBIND_SESSION:
2814 ev->r.unbind_session.host_no = shost->host_no;
2815 ev->r.unbind_session.sid = session->sid;
2816 break;
2817 default:
2818 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2819 "%u.\n", event);
2820 kfree_skb(skb);
2821 return -EINVAL;
2822 }
2823
2824
2825
2826
2827
2828 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2829 if (rc == -ESRCH)
2830 iscsi_cls_session_printk(KERN_ERR, session,
2831 "Cannot notify userspace of session "
2832 "event %u. Check iscsi daemon\n",
2833 event);
2834
2835 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2836 event, rc);
2837 return rc;
2838}
2839EXPORT_SYMBOL_GPL(iscsi_session_event);
2840
2841static int
2842iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2843 struct iscsi_uevent *ev, pid_t pid,
2844 uint32_t initial_cmdsn, uint16_t cmds_max,
2845 uint16_t queue_depth)
2846{
2847 struct iscsi_transport *transport = priv->iscsi_transport;
2848 struct iscsi_cls_session *session;
2849 struct Scsi_Host *shost;
2850
2851 session = transport->create_session(ep, cmds_max, queue_depth,
2852 initial_cmdsn);
2853 if (!session)
2854 return -ENOMEM;
2855
2856 session->creator = pid;
2857 shost = iscsi_session_to_shost(session);
2858 ev->r.c_session_ret.host_no = shost->host_no;
2859 ev->r.c_session_ret.sid = session->sid;
2860 ISCSI_DBG_TRANS_SESSION(session,
2861 "Completed creating transport session\n");
2862 return 0;
2863}
2864
2865static int
2866iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2867{
2868 struct iscsi_cls_conn *conn;
2869 struct iscsi_cls_session *session;
2870
2871 session = iscsi_session_lookup(ev->u.c_conn.sid);
2872 if (!session) {
2873 printk(KERN_ERR "iscsi: invalid session %d.\n",
2874 ev->u.c_conn.sid);
2875 return -EINVAL;
2876 }
2877
2878 conn = transport->create_conn(session, ev->u.c_conn.cid);
2879 if (!conn) {
2880 iscsi_cls_session_printk(KERN_ERR, session,
2881 "couldn't create a new connection.");
2882 return -ENOMEM;
2883 }
2884
2885 ev->r.c_conn_ret.sid = session->sid;
2886 ev->r.c_conn_ret.cid = conn->cid;
2887
2888 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2889 return 0;
2890}
2891
2892static int
2893iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2894{
2895 struct iscsi_cls_conn *conn;
2896
2897 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2898 if (!conn)
2899 return -EINVAL;
2900
2901 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n");
2902 flush_work(&conn->cleanup_work);
2903 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2904
2905 if (transport->destroy_conn)
2906 transport->destroy_conn(conn);
2907 return 0;
2908}
2909
2910static int
2911iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2912{
2913 char *data = (char*)ev + sizeof(*ev);
2914 struct iscsi_cls_conn *conn;
2915 struct iscsi_cls_session *session;
2916 int err = 0, value = 0;
2917
2918 if (ev->u.set_param.len > PAGE_SIZE)
2919 return -EINVAL;
2920
2921 session = iscsi_session_lookup(ev->u.set_param.sid);
2922 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2923 if (!conn || !session)
2924 return -EINVAL;
2925
2926 switch (ev->u.set_param.param) {
2927 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2928 sscanf(data, "%d", &value);
2929 if (!session->recovery_tmo_sysfs_override)
2930 session->recovery_tmo = value;
2931 break;
2932 default:
2933 err = transport->set_param(conn, ev->u.set_param.param,
2934 data, ev->u.set_param.len);
2935 if ((conn->state == ISCSI_CONN_BOUND) ||
2936 (conn->state == ISCSI_CONN_UP)) {
2937 err = transport->set_param(conn, ev->u.set_param.param,
2938 data, ev->u.set_param.len);
2939 } else {
2940 return -ENOTCONN;
2941 }
2942 }
2943
2944 return err;
2945}
2946
2947static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2948 struct iscsi_uevent *ev, int msg_type)
2949{
2950 struct iscsi_endpoint *ep;
2951 struct sockaddr *dst_addr;
2952 struct Scsi_Host *shost = NULL;
2953 int non_blocking, err = 0;
2954
2955 if (!transport->ep_connect)
2956 return -EINVAL;
2957
2958 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2959 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2960 if (!shost) {
2961 printk(KERN_ERR "ep connect failed. Could not find "
2962 "host no %u\n",
2963 ev->u.ep_connect_through_host.host_no);
2964 return -ENODEV;
2965 }
2966 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2967 } else
2968 non_blocking = ev->u.ep_connect.non_blocking;
2969
2970 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2971 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2972 if (IS_ERR(ep)) {
2973 err = PTR_ERR(ep);
2974 goto release_host;
2975 }
2976
2977 ev->r.ep_connect_ret.handle = ep->id;
2978release_host:
2979 if (shost)
2980 scsi_host_put(shost);
2981 return err;
2982}
2983
2984static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2985 u64 ep_handle)
2986{
2987 struct iscsi_cls_conn *conn;
2988 struct iscsi_endpoint *ep;
2989
2990 if (!transport->ep_disconnect)
2991 return -EINVAL;
2992
2993 ep = iscsi_lookup_endpoint(ep_handle);
2994 if (!ep)
2995 return -EINVAL;
2996
2997 conn = ep->conn;
2998 if (!conn) {
2999
3000
3001
3002
3003 transport->ep_disconnect(ep);
3004 goto put_ep;
3005 }
3006
3007 mutex_lock(&conn->ep_mutex);
3008
3009 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
3010 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n");
3011 mutex_unlock(&conn->ep_mutex);
3012
3013 flush_work(&conn->cleanup_work);
3014 goto put_ep;
3015 }
3016
3017 iscsi_ep_disconnect(conn, false);
3018 mutex_unlock(&conn->ep_mutex);
3019put_ep:
3020 iscsi_put_endpoint(ep);
3021 return 0;
3022}
3023
3024static int
3025iscsi_if_transport_ep(struct iscsi_transport *transport,
3026 struct iscsi_uevent *ev, int msg_type)
3027{
3028 struct iscsi_endpoint *ep;
3029 int rc = 0;
3030
3031 switch (msg_type) {
3032 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3033 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3034 rc = iscsi_if_ep_connect(transport, ev, msg_type);
3035 break;
3036 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3037 if (!transport->ep_poll)
3038 return -EINVAL;
3039
3040 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
3041 if (!ep)
3042 return -EINVAL;
3043
3044 ev->r.retcode = transport->ep_poll(ep,
3045 ev->u.ep_poll.timeout_ms);
3046 iscsi_put_endpoint(ep);
3047 break;
3048 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3049 rc = iscsi_if_ep_disconnect(transport,
3050 ev->u.ep_disconnect.ep_handle);
3051 break;
3052 }
3053 return rc;
3054}
3055
3056static int
3057iscsi_tgt_dscvr(struct iscsi_transport *transport,
3058 struct iscsi_uevent *ev)
3059{
3060 struct Scsi_Host *shost;
3061 struct sockaddr *dst_addr;
3062 int err;
3063
3064 if (!transport->tgt_dscvr)
3065 return -EINVAL;
3066
3067 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3068 if (!shost) {
3069 printk(KERN_ERR "target discovery could not find host no %u\n",
3070 ev->u.tgt_dscvr.host_no);
3071 return -ENODEV;
3072 }
3073
3074
3075 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3076 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3077 ev->u.tgt_dscvr.enable, dst_addr);
3078 scsi_host_put(shost);
3079 return err;
3080}
3081
3082static int
3083iscsi_set_host_param(struct iscsi_transport *transport,
3084 struct iscsi_uevent *ev)
3085{
3086 char *data = (char*)ev + sizeof(*ev);
3087 struct Scsi_Host *shost;
3088 int err;
3089
3090 if (!transport->set_host_param)
3091 return -ENOSYS;
3092
3093 if (ev->u.set_host_param.len > PAGE_SIZE)
3094 return -EINVAL;
3095
3096 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3097 if (!shost) {
3098 printk(KERN_ERR "set_host_param could not find host no %u\n",
3099 ev->u.set_host_param.host_no);
3100 return -ENODEV;
3101 }
3102
3103 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3104 data, ev->u.set_host_param.len);
3105 scsi_host_put(shost);
3106 return err;
3107}
3108
3109static int
3110iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3111{
3112 struct Scsi_Host *shost;
3113 struct iscsi_path *params;
3114 int err;
3115
3116 if (!transport->set_path)
3117 return -ENOSYS;
3118
3119 shost = scsi_host_lookup(ev->u.set_path.host_no);
3120 if (!shost) {
3121 printk(KERN_ERR "set path could not find host no %u\n",
3122 ev->u.set_path.host_no);
3123 return -ENODEV;
3124 }
3125
3126 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3127 err = transport->set_path(shost, params);
3128
3129 scsi_host_put(shost);
3130 return err;
3131}
3132
3133static int iscsi_session_has_conns(int sid)
3134{
3135 struct iscsi_cls_conn *conn;
3136 unsigned long flags;
3137 int found = 0;
3138
3139 spin_lock_irqsave(&connlock, flags);
3140 list_for_each_entry(conn, &connlist, conn_list) {
3141 if (iscsi_conn_get_sid(conn) == sid) {
3142 found = 1;
3143 break;
3144 }
3145 }
3146 spin_unlock_irqrestore(&connlock, flags);
3147
3148 return found;
3149}
3150
3151static int
3152iscsi_set_iface_params(struct iscsi_transport *transport,
3153 struct iscsi_uevent *ev, uint32_t len)
3154{
3155 char *data = (char *)ev + sizeof(*ev);
3156 struct Scsi_Host *shost;
3157 int err;
3158
3159 if (!transport->set_iface_param)
3160 return -ENOSYS;
3161
3162 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3163 if (!shost) {
3164 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3165 ev->u.set_iface_params.host_no);
3166 return -ENODEV;
3167 }
3168
3169 err = transport->set_iface_param(shost, data, len);
3170 scsi_host_put(shost);
3171 return err;
3172}
3173
3174static int
3175iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3176{
3177 struct Scsi_Host *shost;
3178 struct sockaddr *dst_addr;
3179 int err;
3180
3181 if (!transport->send_ping)
3182 return -ENOSYS;
3183
3184 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3185 if (!shost) {
3186 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3187 ev->u.iscsi_ping.host_no);
3188 return -ENODEV;
3189 }
3190
3191 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3192 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3193 ev->u.iscsi_ping.iface_type,
3194 ev->u.iscsi_ping.payload_size,
3195 ev->u.iscsi_ping.pid,
3196 dst_addr);
3197 scsi_host_put(shost);
3198 return err;
3199}
3200
3201static int
3202iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3203{
3204 struct iscsi_uevent *ev = nlmsg_data(nlh);
3205 struct Scsi_Host *shost = NULL;
3206 struct iscsi_chap_rec *chap_rec;
3207 struct iscsi_internal *priv;
3208 struct sk_buff *skbchap;
3209 struct nlmsghdr *nlhchap;
3210 struct iscsi_uevent *evchap;
3211 uint32_t chap_buf_size;
3212 int len, err = 0;
3213 char *buf;
3214
3215 if (!transport->get_chap)
3216 return -EINVAL;
3217
3218 priv = iscsi_if_transport_lookup(transport);
3219 if (!priv)
3220 return -EINVAL;
3221
3222 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3223 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3224
3225 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3226 if (!shost) {
3227 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3228 __func__, ev->u.get_chap.host_no);
3229 return -ENODEV;
3230 }
3231
3232 do {
3233 int actual_size;
3234
3235 skbchap = alloc_skb(len, GFP_KERNEL);
3236 if (!skbchap) {
3237 printk(KERN_ERR "can not deliver chap: OOM\n");
3238 err = -ENOMEM;
3239 goto exit_get_chap;
3240 }
3241
3242 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3243 (len - sizeof(*nlhchap)), 0);
3244 evchap = nlmsg_data(nlhchap);
3245 memset(evchap, 0, sizeof(*evchap));
3246 evchap->transport_handle = iscsi_handle(transport);
3247 evchap->type = nlh->nlmsg_type;
3248 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3249 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3250 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3251 buf = (char *)evchap + sizeof(*evchap);
3252 memset(buf, 0, chap_buf_size);
3253
3254 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3255 &evchap->u.get_chap.num_entries, buf);
3256
3257 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3258 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3259 nlhchap->nlmsg_len = actual_size;
3260
3261 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3262 GFP_KERNEL);
3263 } while (err < 0 && err != -ECONNREFUSED);
3264
3265exit_get_chap:
3266 scsi_host_put(shost);
3267 return err;
3268}
3269
3270static int iscsi_set_chap(struct iscsi_transport *transport,
3271 struct iscsi_uevent *ev, uint32_t len)
3272{
3273 char *data = (char *)ev + sizeof(*ev);
3274 struct Scsi_Host *shost;
3275 int err = 0;
3276
3277 if (!transport->set_chap)
3278 return -ENOSYS;
3279
3280 shost = scsi_host_lookup(ev->u.set_path.host_no);
3281 if (!shost) {
3282 pr_err("%s could not find host no %u\n",
3283 __func__, ev->u.set_path.host_no);
3284 return -ENODEV;
3285 }
3286
3287 err = transport->set_chap(shost, data, len);
3288 scsi_host_put(shost);
3289 return err;
3290}
3291
3292static int iscsi_delete_chap(struct iscsi_transport *transport,
3293 struct iscsi_uevent *ev)
3294{
3295 struct Scsi_Host *shost;
3296 int err = 0;
3297
3298 if (!transport->delete_chap)
3299 return -ENOSYS;
3300
3301 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3302 if (!shost) {
3303 printk(KERN_ERR "%s could not find host no %u\n",
3304 __func__, ev->u.delete_chap.host_no);
3305 return -ENODEV;
3306 }
3307
3308 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3309 scsi_host_put(shost);
3310 return err;
3311}
3312
3313static const struct {
3314 enum iscsi_discovery_parent_type value;
3315 char *name;
3316} iscsi_discovery_parent_names[] = {
3317 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3318 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3319 {ISCSI_DISC_PARENT_ISNS, "isns" },
3320};
3321
3322char *iscsi_get_discovery_parent_name(int parent_type)
3323{
3324 int i;
3325 char *state = "Unknown!";
3326
3327 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3328 if (iscsi_discovery_parent_names[i].value & parent_type) {
3329 state = iscsi_discovery_parent_names[i].name;
3330 break;
3331 }
3332 }
3333 return state;
3334}
3335EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3336
3337static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3338 struct iscsi_uevent *ev, uint32_t len)
3339{
3340 char *data = (char *)ev + sizeof(*ev);
3341 struct Scsi_Host *shost;
3342 struct iscsi_bus_flash_session *fnode_sess;
3343 struct iscsi_bus_flash_conn *fnode_conn;
3344 struct device *dev;
3345 uint32_t idx;
3346 int err = 0;
3347
3348 if (!transport->set_flashnode_param) {
3349 err = -ENOSYS;
3350 goto exit_set_fnode;
3351 }
3352
3353 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3354 if (!shost) {
3355 pr_err("%s could not find host no %u\n",
3356 __func__, ev->u.set_flashnode.host_no);
3357 err = -ENODEV;
3358 goto exit_set_fnode;
3359 }
3360
3361 idx = ev->u.set_flashnode.flashnode_idx;
3362 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3363 if (!fnode_sess) {
3364 pr_err("%s could not find flashnode %u for host no %u\n",
3365 __func__, idx, ev->u.set_flashnode.host_no);
3366 err = -ENODEV;
3367 goto put_host;
3368 }
3369
3370 dev = iscsi_find_flashnode_conn(fnode_sess);
3371 if (!dev) {
3372 err = -ENODEV;
3373 goto put_sess;
3374 }
3375
3376 fnode_conn = iscsi_dev_to_flash_conn(dev);
3377 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3378 put_device(dev);
3379
3380put_sess:
3381 put_device(&fnode_sess->dev);
3382
3383put_host:
3384 scsi_host_put(shost);
3385
3386exit_set_fnode:
3387 return err;
3388}
3389
3390static int iscsi_new_flashnode(struct iscsi_transport *transport,
3391 struct iscsi_uevent *ev, uint32_t len)
3392{
3393 char *data = (char *)ev + sizeof(*ev);
3394 struct Scsi_Host *shost;
3395 int index;
3396 int err = 0;
3397
3398 if (!transport->new_flashnode) {
3399 err = -ENOSYS;
3400 goto exit_new_fnode;
3401 }
3402
3403 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3404 if (!shost) {
3405 pr_err("%s could not find host no %u\n",
3406 __func__, ev->u.new_flashnode.host_no);
3407 err = -ENODEV;
3408 goto put_host;
3409 }
3410
3411 index = transport->new_flashnode(shost, data, len);
3412
3413 if (index >= 0)
3414 ev->r.new_flashnode_ret.flashnode_idx = index;
3415 else
3416 err = -EIO;
3417
3418put_host:
3419 scsi_host_put(shost);
3420
3421exit_new_fnode:
3422 return err;
3423}
3424
3425static int iscsi_del_flashnode(struct iscsi_transport *transport,
3426 struct iscsi_uevent *ev)
3427{
3428 struct Scsi_Host *shost;
3429 struct iscsi_bus_flash_session *fnode_sess;
3430 uint32_t idx;
3431 int err = 0;
3432
3433 if (!transport->del_flashnode) {
3434 err = -ENOSYS;
3435 goto exit_del_fnode;
3436 }
3437
3438 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3439 if (!shost) {
3440 pr_err("%s could not find host no %u\n",
3441 __func__, ev->u.del_flashnode.host_no);
3442 err = -ENODEV;
3443 goto put_host;
3444 }
3445
3446 idx = ev->u.del_flashnode.flashnode_idx;
3447 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3448 if (!fnode_sess) {
3449 pr_err("%s could not find flashnode %u for host no %u\n",
3450 __func__, idx, ev->u.del_flashnode.host_no);
3451 err = -ENODEV;
3452 goto put_host;
3453 }
3454
3455 err = transport->del_flashnode(fnode_sess);
3456 put_device(&fnode_sess->dev);
3457
3458put_host:
3459 scsi_host_put(shost);
3460
3461exit_del_fnode:
3462 return err;
3463}
3464
3465static int iscsi_login_flashnode(struct iscsi_transport *transport,
3466 struct iscsi_uevent *ev)
3467{
3468 struct Scsi_Host *shost;
3469 struct iscsi_bus_flash_session *fnode_sess;
3470 struct iscsi_bus_flash_conn *fnode_conn;
3471 struct device *dev;
3472 uint32_t idx;
3473 int err = 0;
3474
3475 if (!transport->login_flashnode) {
3476 err = -ENOSYS;
3477 goto exit_login_fnode;
3478 }
3479
3480 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3481 if (!shost) {
3482 pr_err("%s could not find host no %u\n",
3483 __func__, ev->u.login_flashnode.host_no);
3484 err = -ENODEV;
3485 goto put_host;
3486 }
3487
3488 idx = ev->u.login_flashnode.flashnode_idx;
3489 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3490 if (!fnode_sess) {
3491 pr_err("%s could not find flashnode %u for host no %u\n",
3492 __func__, idx, ev->u.login_flashnode.host_no);
3493 err = -ENODEV;
3494 goto put_host;
3495 }
3496
3497 dev = iscsi_find_flashnode_conn(fnode_sess);
3498 if (!dev) {
3499 err = -ENODEV;
3500 goto put_sess;
3501 }
3502
3503 fnode_conn = iscsi_dev_to_flash_conn(dev);
3504 err = transport->login_flashnode(fnode_sess, fnode_conn);
3505 put_device(dev);
3506
3507put_sess:
3508 put_device(&fnode_sess->dev);
3509
3510put_host:
3511 scsi_host_put(shost);
3512
3513exit_login_fnode:
3514 return err;
3515}
3516
3517static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3518 struct iscsi_uevent *ev)
3519{
3520 struct Scsi_Host *shost;
3521 struct iscsi_bus_flash_session *fnode_sess;
3522 struct iscsi_bus_flash_conn *fnode_conn;
3523 struct device *dev;
3524 uint32_t idx;
3525 int err = 0;
3526
3527 if (!transport->logout_flashnode) {
3528 err = -ENOSYS;
3529 goto exit_logout_fnode;
3530 }
3531
3532 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3533 if (!shost) {
3534 pr_err("%s could not find host no %u\n",
3535 __func__, ev->u.logout_flashnode.host_no);
3536 err = -ENODEV;
3537 goto put_host;
3538 }
3539
3540 idx = ev->u.logout_flashnode.flashnode_idx;
3541 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3542 if (!fnode_sess) {
3543 pr_err("%s could not find flashnode %u for host no %u\n",
3544 __func__, idx, ev->u.logout_flashnode.host_no);
3545 err = -ENODEV;
3546 goto put_host;
3547 }
3548
3549 dev = iscsi_find_flashnode_conn(fnode_sess);
3550 if (!dev) {
3551 err = -ENODEV;
3552 goto put_sess;
3553 }
3554
3555 fnode_conn = iscsi_dev_to_flash_conn(dev);
3556
3557 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3558 put_device(dev);
3559
3560put_sess:
3561 put_device(&fnode_sess->dev);
3562
3563put_host:
3564 scsi_host_put(shost);
3565
3566exit_logout_fnode:
3567 return err;
3568}
3569
3570static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3571 struct iscsi_uevent *ev)
3572{
3573 struct Scsi_Host *shost;
3574 struct iscsi_cls_session *session;
3575 int err = 0;
3576
3577 if (!transport->logout_flashnode_sid) {
3578 err = -ENOSYS;
3579 goto exit_logout_sid;
3580 }
3581
3582 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3583 if (!shost) {
3584 pr_err("%s could not find host no %u\n",
3585 __func__, ev->u.logout_flashnode.host_no);
3586 err = -ENODEV;
3587 goto put_host;
3588 }
3589
3590 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3591 if (!session) {
3592 pr_err("%s could not find session id %u\n",
3593 __func__, ev->u.logout_flashnode_sid.sid);
3594 err = -EINVAL;
3595 goto put_host;
3596 }
3597
3598 err = transport->logout_flashnode_sid(session);
3599
3600put_host:
3601 scsi_host_put(shost);
3602
3603exit_logout_sid:
3604 return err;
3605}
3606
3607static int
3608iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3609{
3610 struct iscsi_uevent *ev = nlmsg_data(nlh);
3611 struct Scsi_Host *shost = NULL;
3612 struct iscsi_internal *priv;
3613 struct sk_buff *skbhost_stats;
3614 struct nlmsghdr *nlhhost_stats;
3615 struct iscsi_uevent *evhost_stats;
3616 int host_stats_size = 0;
3617 int len, err = 0;
3618 char *buf;
3619
3620 if (!transport->get_host_stats)
3621 return -ENOSYS;
3622
3623 priv = iscsi_if_transport_lookup(transport);
3624 if (!priv)
3625 return -EINVAL;
3626
3627 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3628 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3629
3630 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3631 if (!shost) {
3632 pr_err("%s: failed. Could not find host no %u\n",
3633 __func__, ev->u.get_host_stats.host_no);
3634 return -ENODEV;
3635 }
3636
3637 do {
3638 int actual_size;
3639
3640 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3641 if (!skbhost_stats) {
3642 pr_err("cannot deliver host stats: OOM\n");
3643 err = -ENOMEM;
3644 goto exit_host_stats;
3645 }
3646
3647 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3648 (len - sizeof(*nlhhost_stats)), 0);
3649 evhost_stats = nlmsg_data(nlhhost_stats);
3650 memset(evhost_stats, 0, sizeof(*evhost_stats));
3651 evhost_stats->transport_handle = iscsi_handle(transport);
3652 evhost_stats->type = nlh->nlmsg_type;
3653 evhost_stats->u.get_host_stats.host_no =
3654 ev->u.get_host_stats.host_no;
3655 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3656 memset(buf, 0, host_stats_size);
3657
3658 err = transport->get_host_stats(shost, buf, host_stats_size);
3659 if (err) {
3660 kfree_skb(skbhost_stats);
3661 goto exit_host_stats;
3662 }
3663
3664 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3665 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3666 nlhhost_stats->nlmsg_len = actual_size;
3667
3668 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3669 GFP_KERNEL);
3670 } while (err < 0 && err != -ECONNREFUSED);
3671
3672exit_host_stats:
3673 scsi_host_put(shost);
3674 return err;
3675}
3676
3677static int iscsi_if_transport_conn(struct iscsi_transport *transport,
3678 struct nlmsghdr *nlh)
3679{
3680 struct iscsi_uevent *ev = nlmsg_data(nlh);
3681 struct iscsi_cls_session *session;
3682 struct iscsi_cls_conn *conn = NULL;
3683 struct iscsi_endpoint *ep;
3684 uint32_t pdu_len;
3685 int err = 0;
3686
3687 switch (nlh->nlmsg_type) {
3688 case ISCSI_UEVENT_CREATE_CONN:
3689 return iscsi_if_create_conn(transport, ev);
3690 case ISCSI_UEVENT_DESTROY_CONN:
3691 return iscsi_if_destroy_conn(transport, ev);
3692 case ISCSI_UEVENT_STOP_CONN:
3693 return iscsi_if_stop_conn(transport, ev);
3694 }
3695
3696
3697
3698
3699
3700
3701
3702
3703 switch (nlh->nlmsg_type) {
3704 case ISCSI_UEVENT_START_CONN:
3705 conn = iscsi_conn_lookup(ev->u.start_conn.sid,
3706 ev->u.start_conn.cid);
3707 break;
3708 case ISCSI_UEVENT_BIND_CONN:
3709 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3710 break;
3711 case ISCSI_UEVENT_SEND_PDU:
3712 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3713 break;
3714 }
3715
3716 if (!conn)
3717 return -EINVAL;
3718
3719 mutex_lock(&conn->ep_mutex);
3720 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
3721 mutex_unlock(&conn->ep_mutex);
3722 ev->r.retcode = -ENOTCONN;
3723 return 0;
3724 }
3725
3726 switch (nlh->nlmsg_type) {
3727 case ISCSI_UEVENT_BIND_CONN:
3728 if (conn->ep) {
3729
3730
3731
3732
3733
3734
3735 iscsi_ep_disconnect(conn, true);
3736 }
3737
3738 session = iscsi_session_lookup(ev->u.b_conn.sid);
3739 if (!session) {
3740 err = -EINVAL;
3741 break;
3742 }
3743
3744 ev->r.retcode = transport->bind_conn(session, conn,
3745 ev->u.b_conn.transport_eph,
3746 ev->u.b_conn.is_leading);
3747 if (!ev->r.retcode)
3748 conn->state = ISCSI_CONN_BOUND;
3749
3750 if (ev->r.retcode || !transport->ep_connect)
3751 break;
3752
3753 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3754 if (ep) {
3755 ep->conn = conn;
3756 conn->ep = ep;
3757 iscsi_put_endpoint(ep);
3758 } else {
3759 err = -ENOTCONN;
3760 iscsi_cls_conn_printk(KERN_ERR, conn,
3761 "Could not set ep conn binding\n");
3762 }
3763 break;
3764 case ISCSI_UEVENT_START_CONN:
3765 ev->r.retcode = transport->start_conn(conn);
3766 if (!ev->r.retcode)
3767 conn->state = ISCSI_CONN_UP;
3768 break;
3769 case ISCSI_UEVENT_SEND_PDU:
3770 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev);
3771
3772 if ((ev->u.send_pdu.hdr_size > pdu_len) ||
3773 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {
3774 err = -EINVAL;
3775 break;
3776 }
3777
3778 ev->r.retcode = transport->send_pdu(conn,
3779 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)),
3780 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3781 ev->u.send_pdu.data_size);
3782 break;
3783 default:
3784 err = -ENOSYS;
3785 }
3786
3787 mutex_unlock(&conn->ep_mutex);
3788 return err;
3789}
3790
3791static int
3792iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3793{
3794 int err = 0;
3795 u32 portid;
3796 struct iscsi_uevent *ev = nlmsg_data(nlh);
3797 struct iscsi_transport *transport = NULL;
3798 struct iscsi_internal *priv;
3799 struct iscsi_cls_session *session;
3800 struct iscsi_endpoint *ep = NULL;
3801
3802 if (!
