1
2
3
4
5
6
7
8
9
10#include <linux/module.h>
11#include <linux/mutex.h>
12#include <linux/slab.h>
13#include <linux/bsg-lib.h>
14#include <linux/idr.h>
15#include <net/tcp.h>
16#include <scsi/scsi.h>
17#include <scsi/scsi_host.h>
18#include <scsi/scsi_device.h>
19#include <scsi/scsi_transport.h>
20#include <scsi/scsi_transport_iscsi.h>
21#include <scsi/iscsi_if.h>
22#include <scsi/scsi_cmnd.h>
23#include <scsi/scsi_bsg_iscsi.h>
24
25#define ISCSI_TRANSPORT_VERSION "2.0-870"
26
27#define ISCSI_SEND_MAX_ALLOWED 10
28
29#define CREATE_TRACE_POINTS
30#include <trace/events/iscsi.h>
31
32
33
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
89
90
91
92static void stop_conn_work_fn(struct work_struct *work);
93static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);
94
95static atomic_t iscsi_session_nr;
96static struct workqueue_struct *iscsi_eh_timer_workq;
97
98static struct workqueue_struct *iscsi_destroy_workq;
99
100static DEFINE_IDA(iscsi_sess_ida);
101
102
103
104
105
106static LIST_HEAD(iscsi_transports);
107static DEFINE_SPINLOCK(iscsi_transport_lock);
108
109#define to_iscsi_internal(tmpl) \
110 container_of(tmpl, struct iscsi_internal, t)
111
112#define dev_to_iscsi_internal(_dev) \
113 container_of(_dev, struct iscsi_internal, dev)
114
115static void iscsi_transport_release(struct device *dev)
116{
117 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
118 kfree(priv);
119}
120
121
122
123
124
125static struct class iscsi_transport_class = {
126 .name = "iscsi_transport",
127 .dev_release = iscsi_transport_release,
128};
129
130static ssize_t
131show_transport_handle(struct device *dev, struct device_attribute *attr,
132 char *buf)
133{
134 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
135 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
136}
137static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
138
139#define show_transport_attr(name, format) \
140static ssize_t \
141show_transport_##name(struct device *dev, \
142 struct device_attribute *attr,char *buf) \
143{ \
144 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
145 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
146} \
147static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
148
149show_transport_attr(caps, "0x%x");
150
151static struct attribute *iscsi_transport_attrs[] = {
152 &dev_attr_handle.attr,
153 &dev_attr_caps.attr,
154 NULL,
155};
156
157static struct attribute_group iscsi_transport_group = {
158 .attrs = iscsi_transport_attrs,
159};
160
161
162
163
164#define iscsi_dev_to_endpoint(_dev) \
165 container_of(_dev, struct iscsi_endpoint, dev)
166
167#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
168struct device_attribute dev_attr_##_prefix##_##_name = \
169 __ATTR(_name,_mode,_show,_store)
170
171static void iscsi_endpoint_release(struct device *dev)
172{
173 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
174 kfree(ep);
175}
176
177static struct class iscsi_endpoint_class = {
178 .name = "iscsi_endpoint",
179 .dev_release = iscsi_endpoint_release,
180};
181
182static ssize_t
183show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
184{
185 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
186 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
187}
188static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
189
190static struct attribute *iscsi_endpoint_attrs[] = {
191 &dev_attr_ep_handle.attr,
192 NULL,
193};
194
195static struct attribute_group iscsi_endpoint_group = {
196 .attrs = iscsi_endpoint_attrs,
197};
198
199#define ISCSI_MAX_EPID -1
200
201static int iscsi_match_epid(struct device *dev, const void *data)
202{
203 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
204 const uint64_t *epid = data;
205
206 return *epid == ep->id;
207}
208
209struct iscsi_endpoint *
210iscsi_create_endpoint(int dd_size)
211{
212 struct device *dev;
213 struct iscsi_endpoint *ep;
214 uint64_t id;
215 int err;
216
217 for (id = 1; id < ISCSI_MAX_EPID; id++) {
218 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
219 iscsi_match_epid);
220 if (!dev)
221 break;
222 else
223 put_device(dev);
224 }
225 if (id == ISCSI_MAX_EPID) {
226 printk(KERN_ERR "Too many connections. Max supported %u\n",
227 ISCSI_MAX_EPID - 1);
228 return NULL;
229 }
230
231 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
232 if (!ep)
233 return NULL;
234
235 ep->id = id;
236 ep->dev.class = &iscsi_endpoint_class;
237 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
238 err = device_register(&ep->dev);
239 if (err)
240 goto free_ep;
241
242 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
243 if (err)
244 goto unregister_dev;
245
246 if (dd_size)
247 ep->dd_data = &ep[1];
248 return ep;
249
250unregister_dev:
251 device_unregister(&ep->dev);
252 return NULL;
253
254free_ep:
255 kfree(ep);
256 return NULL;
257}
258EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
259
260void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
261{
262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
263 device_unregister(&ep->dev);
264}
265EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
266
267struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
268{
269 struct iscsi_endpoint *ep;
270 struct device *dev;
271
272 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
273 iscsi_match_epid);
274 if (!dev)
275 return NULL;
276
277 ep = iscsi_dev_to_endpoint(dev);
278
279
280
281
282 put_device(dev);
283 return ep;
284}
285EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
286
287
288
289
290
291static void iscsi_iface_release(struct device *dev)
292{
293 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
294 struct device *parent = iface->dev.parent;
295
296 kfree(iface);
297 put_device(parent);
298}
299
300
301static struct class iscsi_iface_class = {
302 .name = "iscsi_iface",
303 .dev_release = iscsi_iface_release,
304};
305
306#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
307struct device_attribute dev_attr_##_prefix##_##_name = \
308 __ATTR(_name, _mode, _show, _store)
309
310
311#define iscsi_iface_attr_show(type, name, param_type, param) \
312static ssize_t \
313show_##type##_##name(struct device *dev, struct device_attribute *attr, \
314 char *buf) \
315{ \
316 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
317 struct iscsi_transport *t = iface->transport; \
318 return t->get_iface_param(iface, param_type, param, buf); \
319} \
320
321#define iscsi_iface_net_attr(type, name, param) \
322 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
323static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
324
325#define iscsi_iface_attr(type, name, param) \
326 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
327static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
328
329
330iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
331iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
332iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
333iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
334iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
335 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
336iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
337 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
338iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
339iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
340iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
341 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
342iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
343 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
344iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
345 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
346iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
347 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
348iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
349 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
350iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
351 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
352iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
353 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
354iscsi_iface_net_attr(ipv4_iface, fragment_disable,
355 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
356iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
357 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
358iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
359
360
361iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
362iscsi_iface_net_attr(ipv6_iface, link_local_addr,
363 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
364iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
365iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
366 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
367iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
368 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
369iscsi_iface_net_attr(ipv6_iface, link_local_state,
370 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
371iscsi_iface_net_attr(ipv6_iface, router_state,
372 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
373iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
374 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
375iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
376iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
377iscsi_iface_net_attr(ipv6_iface, traffic_class,
378 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
379iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
380iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
381 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
382iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
383 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
384iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
385 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
386iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
387 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
388iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
389 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
390
391
392iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
393iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
394iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
395iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
396iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
397iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
398iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
399iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
400iscsi_iface_net_attr(iface, tcp_nagle_disable,
401 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
402iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
403iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
404iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
405iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
406iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
407iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
408
409
410iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
411iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
412iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
413iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
414iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
415iscsi_iface_attr(iface, data_seq_in_order,
416 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
417iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
418iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
419iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
420iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
421iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
422iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
423iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
424iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
425iscsi_iface_attr(iface, discovery_auth_optional,
426 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
427iscsi_iface_attr(iface, discovery_logout,
428 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
429iscsi_iface_attr(iface, strict_login_comp_en,
430 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
431iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
432
433static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
434 struct attribute *attr, int i)
435{
436 struct device *dev = container_of(kobj, struct device, kobj);
437 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
438 struct iscsi_transport *t = iface->transport;
439 int param;
440 int param_type;
441
442 if (attr == &dev_attr_iface_enabled.attr)
443 param = ISCSI_NET_PARAM_IFACE_ENABLE;
444 else if (attr == &dev_attr_iface_vlan_id.attr)
445 param = ISCSI_NET_PARAM_VLAN_ID;
446 else if (attr == &dev_attr_iface_vlan_priority.attr)
447 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
448 else if (attr == &dev_attr_iface_vlan_enabled.attr)
449 param = ISCSI_NET_PARAM_VLAN_ENABLED;
450 else if (attr == &dev_attr_iface_mtu.attr)
451 param = ISCSI_NET_PARAM_MTU;
452 else if (attr == &dev_attr_iface_port.attr)
453 param = ISCSI_NET_PARAM_PORT;
454 else if (attr == &dev_attr_iface_ipaddress_state.attr)
455 param = ISCSI_NET_PARAM_IPADDR_STATE;
456 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
457 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
458 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
459 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
460 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
461 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
462 else if (attr == &dev_attr_iface_tcp_wsf.attr)
463 param = ISCSI_NET_PARAM_TCP_WSF;
464 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
465 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
466 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
467 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
468 else if (attr == &dev_attr_iface_cache_id.attr)
469 param = ISCSI_NET_PARAM_CACHE_ID;
470 else if (attr == &dev_attr_iface_redirect_en.attr)
471 param = ISCSI_NET_PARAM_REDIRECT_EN;
472 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
473 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
474 else if (attr == &dev_attr_iface_header_digest.attr)
475 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
476 else if (attr == &dev_attr_iface_data_digest.attr)
477 param = ISCSI_IFACE_PARAM_DATADGST_EN;
478 else if (attr == &dev_attr_iface_immediate_data.attr)
479 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
480 else if (attr == &dev_attr_iface_initial_r2t.attr)
481 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
482 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
483 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
484 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
485 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
486 else if (attr == &dev_attr_iface_erl.attr)
487 param = ISCSI_IFACE_PARAM_ERL;
488 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
489 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
490 else if (attr == &dev_attr_iface_first_burst_len.attr)
491 param = ISCSI_IFACE_PARAM_FIRST_BURST;
492 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
493 param = ISCSI_IFACE_PARAM_MAX_R2T;
494 else if (attr == &dev_attr_iface_max_burst_len.attr)
495 param = ISCSI_IFACE_PARAM_MAX_BURST;
496 else if (attr == &dev_attr_iface_chap_auth.attr)
497 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
498 else if (attr == &dev_attr_iface_bidi_chap.attr)
499 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
500 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
501 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
502 else if (attr == &dev_attr_iface_discovery_logout.attr)
503 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
504 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
505 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
506 else if (attr == &dev_attr_iface_initiator_name.attr)
507 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
508 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
509 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
510 param = ISCSI_NET_PARAM_IPV4_ADDR;
511 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
512 param = ISCSI_NET_PARAM_IPV4_GW;
513 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
514 param = ISCSI_NET_PARAM_IPV4_SUBNET;
515 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
516 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
517 else if (attr ==
518 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
519 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
520 else if (attr ==
521 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
522 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
523 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
524 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
525 else if (attr == &dev_attr_ipv4_iface_tos.attr)
526 param = ISCSI_NET_PARAM_IPV4_TOS;
527 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
528 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
529 else if (attr ==
530 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
531 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
532 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
533 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
534 else if (attr ==
535 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
536 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
537 else if (attr ==
538 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
539 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
540 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
541 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
542 else if (attr ==
543 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
544 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
545 else if (attr ==
546 &dev_attr_ipv4_iface_fragment_disable.attr)
547 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
548 else if (attr ==
549 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
550 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
551 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
552 param = ISCSI_NET_PARAM_IPV4_TTL;
553 else
554 return 0;
555 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
556 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
557 param = ISCSI_NET_PARAM_IPV6_ADDR;
558 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
559 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
560 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
561 param = ISCSI_NET_PARAM_IPV6_ROUTER;
562 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
563 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
564 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
565 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
566 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
567 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
568 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
569 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
570 else if (attr ==
571 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
572 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
573 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
574 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
575 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
576 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
577 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
578 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
579 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
580 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
581 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
582 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
583 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
584 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
585 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
586 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
587 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
588 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
589 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
590 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
591 else
592 return 0;
593 } else {
594 WARN_ONCE(1, "Invalid iface attr");
595 return 0;
596 }
597
598 switch (param) {
599 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
600 case ISCSI_IFACE_PARAM_HDRDGST_EN:
601 case ISCSI_IFACE_PARAM_DATADGST_EN:
602 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
603 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
604 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
605 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
606 case ISCSI_IFACE_PARAM_ERL:
607 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
608 case ISCSI_IFACE_PARAM_FIRST_BURST:
609 case ISCSI_IFACE_PARAM_MAX_R2T:
610 case ISCSI_IFACE_PARAM_MAX_BURST:
611 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
612 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
613 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
614 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
615 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
616 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
617 param_type = ISCSI_IFACE_PARAM;
618 break;
619 default:
620 param_type = ISCSI_NET_PARAM;
621 }
622
623 return t->attr_is_visible(param_type, param);
624}
625
626static struct attribute *iscsi_iface_attrs[] = {
627 &dev_attr_iface_enabled.attr,
628 &dev_attr_iface_vlan_id.attr,
629 &dev_attr_iface_vlan_priority.attr,
630 &dev_attr_iface_vlan_enabled.attr,
631 &dev_attr_ipv4_iface_ipaddress.attr,
632 &dev_attr_ipv4_iface_gateway.attr,
633 &dev_attr_ipv4_iface_subnet.attr,
634 &dev_attr_ipv4_iface_bootproto.attr,
635 &dev_attr_ipv6_iface_ipaddress.attr,
636 &dev_attr_ipv6_iface_link_local_addr.attr,
637 &dev_attr_ipv6_iface_router_addr.attr,
638 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
639 &dev_attr_ipv6_iface_link_local_autocfg.attr,
640 &dev_attr_iface_mtu.attr,
641 &dev_attr_iface_port.attr,
642 &dev_attr_iface_ipaddress_state.attr,
643 &dev_attr_iface_delayed_ack_en.attr,
644 &dev_attr_iface_tcp_nagle_disable.attr,
645 &dev_attr_iface_tcp_wsf_disable.attr,
646 &dev_attr_iface_tcp_wsf.attr,
647 &dev_attr_iface_tcp_timer_scale.attr,
648 &dev_attr_iface_tcp_timestamp_en.attr,
649 &dev_attr_iface_cache_id.attr,
650 &dev_attr_iface_redirect_en.attr,
651 &dev_attr_iface_def_taskmgmt_tmo.attr,
652 &dev_attr_iface_header_digest.attr,
653 &dev_attr_iface_data_digest.attr,
654 &dev_attr_iface_immediate_data.attr,
655 &dev_attr_iface_initial_r2t.attr,
656 &dev_attr_iface_data_seq_in_order.attr,
657 &dev_attr_iface_data_pdu_in_order.attr,
658 &dev_attr_iface_erl.attr,
659 &dev_attr_iface_max_recv_dlength.attr,
660 &dev_attr_iface_first_burst_len.attr,
661 &dev_attr_iface_max_outstanding_r2t.attr,
662 &dev_attr_iface_max_burst_len.attr,
663 &dev_attr_iface_chap_auth.attr,
664 &dev_attr_iface_bidi_chap.attr,
665 &dev_attr_iface_discovery_auth_optional.attr,
666 &dev_attr_iface_discovery_logout.attr,
667 &dev_attr_iface_strict_login_comp_en.attr,
668 &dev_attr_iface_initiator_name.attr,
669 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
670 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
671 &dev_attr_ipv4_iface_tos_en.attr,
672 &dev_attr_ipv4_iface_tos.attr,
673 &dev_attr_ipv4_iface_grat_arp_en.attr,
674 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
675 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
676 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
677 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
678 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
679 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
680 &dev_attr_ipv4_iface_fragment_disable.attr,
681 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
682 &dev_attr_ipv4_iface_ttl.attr,
683 &dev_attr_ipv6_iface_link_local_state.attr,
684 &dev_attr_ipv6_iface_router_state.attr,
685 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
686 &dev_attr_ipv6_iface_mld_en.attr,
687 &dev_attr_ipv6_iface_flow_label.attr,
688 &dev_attr_ipv6_iface_traffic_class.attr,
689 &dev_attr_ipv6_iface_hop_limit.attr,
690 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
691 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
692 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
693 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
694 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
695 NULL,
696};
697
698static struct attribute_group iscsi_iface_group = {
699 .attrs = iscsi_iface_attrs,
700 .is_visible = iscsi_iface_attr_is_visible,
701};
702
703
704static const struct {
705 enum iscsi_ipaddress_state value;
706 char *name;
707} iscsi_ipaddress_state_names[] = {
708 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
709 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
710 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
711 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
712 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
713 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
714 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
715};
716
717char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
718{
719 int i;
720 char *state = NULL;
721
722 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
723 if (iscsi_ipaddress_state_names[i].value == port_state) {
724 state = iscsi_ipaddress_state_names[i].name;
725 break;
726 }
727 }
728 return state;
729}
730EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
731
732
733static const struct {
734 enum iscsi_router_state value;
735 char *name;
736} iscsi_router_state_names[] = {
737 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
738 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
739 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
740 {ISCSI_ROUTER_STATE_STALE, "Stale" },
741};
742
743char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
744{
745 int i;
746 char *state = NULL;
747
748 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
749 if (iscsi_router_state_names[i].value == router_state) {
750 state = iscsi_router_state_names[i].name;
751 break;
752 }
753 }
754 return state;
755}
756EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
757
758struct iscsi_iface *
759iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
760 uint32_t iface_type, uint32_t iface_num, int dd_size)
761{
762 struct iscsi_iface *iface;
763 int err;
764
765 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
766 if (!iface)
767 return NULL;
768
769 iface->transport = transport;
770 iface->iface_type = iface_type;
771 iface->iface_num = iface_num;
772 iface->dev.release = iscsi_iface_release;
773 iface->dev.class = &iscsi_iface_class;
774
775 iface->dev.parent = get_device(&shost->shost_gendev);
776 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
777 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
778 iface_num);
779 else
780 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
781 iface_num);
782
783 err = device_register(&iface->dev);
784 if (err)
785 goto free_iface;
786
787 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
788 if (err)
789 goto unreg_iface;
790
791 if (dd_size)
792 iface->dd_data = &iface[1];
793 return iface;
794
795unreg_iface:
796 device_unregister(&iface->dev);
797 return NULL;
798
799free_iface:
800 put_device(iface->dev.parent);
801 kfree(iface);
802 return NULL;
803}
804EXPORT_SYMBOL_GPL(iscsi_create_iface);
805
806void iscsi_destroy_iface(struct iscsi_iface *iface)
807{
808 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
809 device_unregister(&iface->dev);
810}
811EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
812
813
814
815
816
817#define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
818struct device_attribute dev_attr_##_prefix##_##_name = \
819 __ATTR(_name, _mode, _show, _store)
820
821
822#define iscsi_flashnode_sess_attr_show(type, name, param) \
823static ssize_t \
824show_##type##_##name(struct device *dev, struct device_attribute *attr, \
825 char *buf) \
826{ \
827 struct iscsi_bus_flash_session *fnode_sess = \
828 iscsi_dev_to_flash_session(dev);\
829 struct iscsi_transport *t = fnode_sess->transport; \
830 return t->get_flashnode_param(fnode_sess, param, buf); \
831} \
832
833
834#define iscsi_flashnode_sess_attr(type, name, param) \
835 iscsi_flashnode_sess_attr_show(type, name, param) \
836static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
837 show_##type##_##name, NULL);
838
839
840
841iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
842 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
843iscsi_flashnode_sess_attr(fnode, discovery_session,
844 ISCSI_FLASHNODE_DISCOVERY_SESS);
845iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
846iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
847iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
848iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
849iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
850 ISCSI_FLASHNODE_DATASEQ_INORDER);
851iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
852 ISCSI_FLASHNODE_PDU_INORDER);
853iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
854iscsi_flashnode_sess_attr(fnode, discovery_logout,
855 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
856iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
857iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
858 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
859iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
860iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
861iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
862iscsi_flashnode_sess_attr(fnode, def_time2retain,
863 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
864iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
865iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
866iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
867iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
868iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
869 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
870iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
871iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
872iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
873iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
874 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
875iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
876 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
877iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
878iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
879iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
880iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
881iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
882iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
883iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
884
885static struct attribute *iscsi_flashnode_sess_attrs[] = {
886 &dev_attr_fnode_auto_snd_tgt_disable.attr,
887 &dev_attr_fnode_discovery_session.attr,
888 &dev_attr_fnode_portal_type.attr,
889 &dev_attr_fnode_entry_enable.attr,
890 &dev_attr_fnode_immediate_data.attr,
891 &dev_attr_fnode_initial_r2t.attr,
892 &dev_attr_fnode_data_seq_in_order.attr,
893 &dev_attr_fnode_data_pdu_in_order.attr,
894 &dev_attr_fnode_chap_auth.attr,
895 &dev_attr_fnode_discovery_logout.attr,
896 &dev_attr_fnode_bidi_chap.attr,
897 &dev_attr_fnode_discovery_auth_optional.attr,
898 &dev_attr_fnode_erl.attr,
899 &dev_attr_fnode_first_burst_len.attr,
900 &dev_attr_fnode_def_time2wait.attr,
901 &dev_attr_fnode_def_time2retain.attr,
902 &dev_attr_fnode_max_outstanding_r2t.attr,
903 &dev_attr_fnode_isid.attr,
904 &dev_attr_fnode_tsid.attr,
905 &dev_attr_fnode_max_burst_len.attr,
906 &dev_attr_fnode_def_taskmgmt_tmo.attr,
907 &dev_attr_fnode_targetalias.attr,
908 &dev_attr_fnode_targetname.attr,
909 &dev_attr_fnode_tpgt.attr,
910 &dev_attr_fnode_discovery_parent_idx.attr,
911 &dev_attr_fnode_discovery_parent_type.attr,
912 &dev_attr_fnode_chap_in_idx.attr,
913 &dev_attr_fnode_chap_out_idx.attr,
914 &dev_attr_fnode_username.attr,
915 &dev_attr_fnode_username_in.attr,
916 &dev_attr_fnode_password.attr,
917 &dev_attr_fnode_password_in.attr,
918 &dev_attr_fnode_is_boot_target.attr,
919 NULL,
920};
921
922static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
923 struct attribute *attr,
924 int i)
925{
926 struct device *dev = container_of(kobj, struct device, kobj);
927 struct iscsi_bus_flash_session *fnode_sess =
928 iscsi_dev_to_flash_session(dev);
929 struct iscsi_transport *t = fnode_sess->transport;
930 int param;
931
932 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
933 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
934 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
935 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
936 } else if (attr == &dev_attr_fnode_portal_type.attr) {
937 param = ISCSI_FLASHNODE_PORTAL_TYPE;
938 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
939 param = ISCSI_FLASHNODE_ENTRY_EN;
940 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
941 param = ISCSI_FLASHNODE_IMM_DATA_EN;
942 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
943 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
944 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
945 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
946 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
947 param = ISCSI_FLASHNODE_PDU_INORDER;
948 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
949 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
950 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
951 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
952 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
953 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
954 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
955 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
956 } else if (attr == &dev_attr_fnode_erl.attr) {
957 param = ISCSI_FLASHNODE_ERL;
958 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
959 param = ISCSI_FLASHNODE_FIRST_BURST;
960 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
961 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
962 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
963 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
964 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
965 param = ISCSI_FLASHNODE_MAX_R2T;
966 } else if (attr == &dev_attr_fnode_isid.attr) {
967 param = ISCSI_FLASHNODE_ISID;
968 } else if (attr == &dev_attr_fnode_tsid.attr) {
969 param = ISCSI_FLASHNODE_TSID;
970 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
971 param = ISCSI_FLASHNODE_MAX_BURST;
972 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
973 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
974 } else if (attr == &dev_attr_fnode_targetalias.attr) {
975 param = ISCSI_FLASHNODE_ALIAS;
976 } else if (attr == &dev_attr_fnode_targetname.attr) {
977 param = ISCSI_FLASHNODE_NAME;
978 } else if (attr == &dev_attr_fnode_tpgt.attr) {
979 param = ISCSI_FLASHNODE_TPGT;
980 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
981 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
982 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
983 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
984 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
985 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
986 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
987 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
988 } else if (attr == &dev_attr_fnode_username.attr) {
989 param = ISCSI_FLASHNODE_USERNAME;
990 } else if (attr == &dev_attr_fnode_username_in.attr) {
991 param = ISCSI_FLASHNODE_USERNAME_IN;
992 } else if (attr == &dev_attr_fnode_password.attr) {
993 param = ISCSI_FLASHNODE_PASSWORD;
994 } else if (attr == &dev_attr_fnode_password_in.attr) {
995 param = ISCSI_FLASHNODE_PASSWORD_IN;
996 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
997 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
998 } else {
999 WARN_ONCE(1, "Invalid flashnode session attr");
1000 return 0;
1001 }
1002
1003 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1004}
1005
1006static struct attribute_group iscsi_flashnode_sess_attr_group = {
1007 .attrs = iscsi_flashnode_sess_attrs,
1008 .is_visible = iscsi_flashnode_sess_attr_is_visible,
1009};
1010
1011static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1012 &iscsi_flashnode_sess_attr_group,
1013 NULL,
1014};
1015
1016static void iscsi_flashnode_sess_release(struct device *dev)
1017{
1018 struct iscsi_bus_flash_session *fnode_sess =
1019 iscsi_dev_to_flash_session(dev);
1020
1021 kfree(fnode_sess->targetname);
1022 kfree(fnode_sess->targetalias);
1023 kfree(fnode_sess->portal_type);
1024 kfree(fnode_sess);
1025}
1026
1027static const struct device_type iscsi_flashnode_sess_dev_type = {
1028 .name = "iscsi_flashnode_sess_dev_type",
1029 .groups = iscsi_flashnode_sess_attr_groups,
1030 .release = iscsi_flashnode_sess_release,
1031};
1032
1033
1034#define iscsi_flashnode_conn_attr_show(type, name, param) \
1035static ssize_t \
1036show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1037 char *buf) \
1038{ \
1039 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1040 struct iscsi_bus_flash_session *fnode_sess = \
1041 iscsi_flash_conn_to_flash_session(fnode_conn);\
1042 struct iscsi_transport *t = fnode_conn->transport; \
1043 return t->get_flashnode_param(fnode_sess, param, buf); \
1044} \
1045
1046
1047#define iscsi_flashnode_conn_attr(type, name, param) \
1048 iscsi_flashnode_conn_attr_show(type, name, param) \
1049static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1050 show_##type##_##name, NULL);
1051
1052
1053
1054iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1055 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1056iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1057iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1058iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1059iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1060 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1061iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1062 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1063iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1064 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1065iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1066 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1067iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1068 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1069iscsi_flashnode_conn_attr(fnode, fragment_disable,
1070 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1071iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1072iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1073iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1074iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1075 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1076iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1077 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1078iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1079iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1080iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1081iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1082 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1083iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1084 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1085iscsi_flashnode_conn_attr(fnode, max_segment_size,
1086 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1087iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1088 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1089iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1090iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1091iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1092iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1093
1094static struct attribute *iscsi_flashnode_conn_attrs[] = {
1095 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1096 &dev_attr_fnode_header_digest.attr,
1097 &dev_attr_fnode_data_digest.attr,
1098 &dev_attr_fnode_snack_req.attr,
1099 &dev_attr_fnode_tcp_timestamp_stat.attr,
1100 &dev_attr_fnode_tcp_nagle_disable.attr,
1101 &dev_attr_fnode_tcp_wsf_disable.attr,
1102 &dev_attr_fnode_tcp_timer_scale.attr,
1103 &dev_attr_fnode_tcp_timestamp_enable.attr,
1104 &dev_attr_fnode_fragment_disable.attr,
1105 &dev_attr_fnode_max_recv_dlength.attr,
1106 &dev_attr_fnode_max_xmit_dlength.attr,
1107 &dev_attr_fnode_keepalive_tmo.attr,
1108 &dev_attr_fnode_port.attr,
1109 &dev_attr_fnode_ipaddress.attr,
1110 &dev_attr_fnode_redirect_ipaddr.attr,
1111 &dev_attr_fnode_max_segment_size.attr,
1112 &dev_attr_fnode_local_port.attr,
1113 &dev_attr_fnode_ipv4_tos.attr,
1114 &dev_attr_fnode_ipv6_traffic_class.attr,
1115 &dev_attr_fnode_ipv6_flow_label.attr,
1116 &dev_attr_fnode_link_local_ipv6.attr,
1117 &dev_attr_fnode_tcp_xmit_wsf.attr,
1118 &dev_attr_fnode_tcp_recv_wsf.attr,
1119 &dev_attr_fnode_statsn.attr,
1120 &dev_attr_fnode_exp_statsn.attr,
1121 NULL,
1122};
1123
1124static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1125 struct attribute *attr,
1126 int i)
1127{
1128 struct device *dev = container_of(kobj, struct device, kobj);
1129 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1130 struct iscsi_transport *t = fnode_conn->transport;
1131 int param;
1132
1133 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1134 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1135 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1136 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1137 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1138 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1139 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1140 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1141 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1142 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1143 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1144 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1145 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1146 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1147 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1148 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1149 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1150 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1151 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1152 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1153 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1154 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1155 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1156 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1157 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1158 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1159 } else if (attr == &dev_attr_fnode_port.attr) {
1160 param = ISCSI_FLASHNODE_PORT;
1161 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1162 param = ISCSI_FLASHNODE_IPADDR;
1163 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1164 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1165 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1166 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1167 } else if (attr == &dev_attr_fnode_local_port.attr) {
1168 param = ISCSI_FLASHNODE_LOCAL_PORT;
1169 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1170 param = ISCSI_FLASHNODE_IPV4_TOS;
1171 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1172 param = ISCSI_FLASHNODE_IPV6_TC;
1173 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1174 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1175 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1176 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1177 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1178 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1179 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1180 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1181 } else if (attr == &dev_attr_fnode_statsn.attr) {
1182 param = ISCSI_FLASHNODE_STATSN;
1183 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1184 param = ISCSI_FLASHNODE_EXP_STATSN;
1185 } else {
1186 WARN_ONCE(1, "Invalid flashnode connection attr");
1187 return 0;
1188 }
1189
1190 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1191}
1192
1193static struct attribute_group iscsi_flashnode_conn_attr_group = {
1194 .attrs = iscsi_flashnode_conn_attrs,
1195 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1196};
1197
1198static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1199 &iscsi_flashnode_conn_attr_group,
1200 NULL,
1201};
1202
1203static void iscsi_flashnode_conn_release(struct device *dev)
1204{
1205 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1206
1207 kfree(fnode_conn->ipaddress);
1208 kfree(fnode_conn->redirect_ipaddr);
1209 kfree(fnode_conn->link_local_ipv6_addr);
1210 kfree(fnode_conn);
1211}
1212
1213static const struct device_type iscsi_flashnode_conn_dev_type = {
1214 .name = "iscsi_flashnode_conn_dev_type",
1215 .groups = iscsi_flashnode_conn_attr_groups,
1216 .release = iscsi_flashnode_conn_release,
1217};
1218
1219static struct bus_type iscsi_flashnode_bus;
1220
1221int iscsi_flashnode_bus_match(struct device *dev,
1222 struct device_driver *drv)
1223{
1224 if (dev->bus == &iscsi_flashnode_bus)
1225 return 1;
1226 return 0;
1227}
1228EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1229
1230static struct bus_type iscsi_flashnode_bus = {
1231 .name = "iscsi_flashnode",
1232 .match = &iscsi_flashnode_bus_match,
1233};
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248struct iscsi_bus_flash_session *
1249iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1250 struct iscsi_transport *transport,
1251 int dd_size)
1252{
1253 struct iscsi_bus_flash_session *fnode_sess;
1254 int err;
1255
1256 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1257 if (!fnode_sess)
1258 return NULL;
1259
1260 fnode_sess->transport = transport;
1261 fnode_sess->target_id = index;
1262 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1263 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1264 fnode_sess->dev.parent = &shost->shost_gendev;
1265 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1266 shost->host_no, index);
1267
1268 err = device_register(&fnode_sess->dev);
1269 if (err)
1270 goto free_fnode_sess;
1271
1272 if (dd_size)
1273 fnode_sess->dd_data = &fnode_sess[1];
1274
1275 return fnode_sess;
1276
1277free_fnode_sess:
1278 kfree(fnode_sess);
1279 return NULL;
1280}
1281EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296struct iscsi_bus_flash_conn *
1297iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1298 struct iscsi_bus_flash_session *fnode_sess,
1299 struct iscsi_transport *transport,
1300 int dd_size)
1301{
1302 struct iscsi_bus_flash_conn *fnode_conn;
1303 int err;
1304
1305 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1306 if (!fnode_conn)
1307 return NULL;
1308
1309 fnode_conn->transport = transport;
1310 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1311 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1312 fnode_conn->dev.parent = &fnode_sess->dev;
1313 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1314 shost->host_no, fnode_sess->target_id);
1315
1316 err = device_register(&fnode_conn->dev);
1317 if (err)
1318 goto free_fnode_conn;
1319
1320 if (dd_size)
1321 fnode_conn->dd_data = &fnode_conn[1];
1322
1323 return fnode_conn;
1324
1325free_fnode_conn:
1326 kfree(fnode_conn);
1327 return NULL;
1328}
1329EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1343{
1344 return dev->bus == &iscsi_flashnode_bus;
1345}
1346
1347static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1348{
1349 device_unregister(&fnode_conn->dev);
1350 return 0;
1351}
1352
1353static int flashnode_match_index(struct device *dev, void *data)
1354{
1355 struct iscsi_bus_flash_session *fnode_sess = NULL;
1356 int ret = 0;
1357
1358 if (!iscsi_flashnode_bus_match(dev, NULL))
1359 goto exit_match_index;
1360
1361 fnode_sess = iscsi_dev_to_flash_session(dev);
1362 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1363
1364exit_match_index:
1365 return ret;
1366}
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379static struct iscsi_bus_flash_session *
1380iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1381{
1382 struct iscsi_bus_flash_session *fnode_sess = NULL;
1383 struct device *dev;
1384
1385 dev = device_find_child(&shost->shost_gendev, &idx,
1386 flashnode_match_index);
1387 if (dev)
1388 fnode_sess = iscsi_dev_to_flash_session(dev);
1389
1390 return fnode_sess;
1391}
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406struct device *
1407iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1408 int (*fn)(struct device *dev, void *data))
1409{
1410 return device_find_child(&shost->shost_gendev, data, fn);
1411}
1412EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425struct device *
1426iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1427{
1428 return device_find_child(&fnode_sess->dev, NULL,
1429 iscsi_is_flashnode_conn_dev);
1430}
1431EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1432
1433static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1434{
1435 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1436 return 0;
1437
1438 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1439}
1440
1441
1442
1443
1444
1445
1446
1447
1448void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1449{
1450 int err;
1451
1452 err = device_for_each_child(&fnode_sess->dev, NULL,
1453 iscsi_iter_destroy_flashnode_conn_fn);
1454 if (err)
1455 pr_err("Could not delete all connections for %s. Error %d.\n",
1456 fnode_sess->dev.kobj.name, err);
1457
1458 device_unregister(&fnode_sess->dev);
1459}
1460EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1461
1462static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1463{
1464 if (!iscsi_flashnode_bus_match(dev, NULL))
1465 return 0;
1466
1467 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1468 return 0;
1469}
1470
1471
1472
1473
1474
1475
1476
1477
1478void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1479{
1480 device_for_each_child(&shost->shost_gendev, NULL,
1481 iscsi_iter_destroy_flashnode_fn);
1482}
1483EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1484
1485
1486
1487
1488
1489
1490
1491
1492static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1493{
1494 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1495 struct iscsi_bsg_request *req = job->request;
1496 struct iscsi_bsg_reply *reply = job->reply;
1497 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1498 int cmdlen = sizeof(uint32_t);
1499 int ret;
1500
1501
1502 if (job->request_len < sizeof(uint32_t)) {
1503 ret = -ENOMSG;
1504 goto fail_host_msg;
1505 }
1506
1507
1508 switch (req->msgcode) {
1509 case ISCSI_BSG_HST_VENDOR:
1510 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1511 if ((shost->hostt->vendor_id == 0L) ||
1512 (req->rqst_data.h_vendor.vendor_id !=
1513 shost->hostt->vendor_id)) {
1514 ret = -ESRCH;
1515 goto fail_host_msg;
1516 }
1517 break;
1518 default:
1519 ret = -EBADR;
1520 goto fail_host_msg;
1521 }
1522
1523
1524 if (job->request_len < cmdlen) {
1525 ret = -ENOMSG;
1526 goto fail_host_msg;
1527 }
1528
1529 ret = i->iscsi_transport->bsg_request(job);
1530 if (!ret)
1531 return 0;
1532
1533fail_host_msg:
1534
1535 BUG_ON(job->reply_len < sizeof(uint32_t));
1536 reply->reply_payload_rcv_len = 0;
1537 reply->result = ret;
1538 job->reply_len = sizeof(uint32_t);
1539 bsg_job_done(job, ret, 0);
1540 return 0;
1541}
1542
1543
1544
1545
1546
1547
1548static int
1549iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1550{
1551 struct device *dev = &shost->shost_gendev;
1552 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1553 struct request_queue *q;
1554 char bsg_name[20];
1555
1556 if (!i->iscsi_transport->bsg_request)
1557 return -ENOTSUPP;
1558
1559 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1560 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1561 if (IS_ERR(q)) {
1562 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1563 "initialize - no request queue\n");
1564 return PTR_ERR(q);
1565 }
1566 __scsi_init_queue(shost, q);
1567
1568 ihost->bsg_q = q;
1569 return 0;
1570}
1571
1572static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1573 struct device *cdev)
1574{
1575 struct Scsi_Host *shost = dev_to_shost(dev);
1576 struct iscsi_cls_host *ihost = shost->shost_data;
1577
1578 memset(ihost, 0, sizeof(*ihost));
1579 atomic_set(&ihost->nr_scans, 0);
1580 mutex_init(&ihost->mutex);
1581
1582 iscsi_bsg_host_add(shost, ihost);
1583
1584
1585 return 0;
1586}
1587
1588static int iscsi_remove_host(struct transport_container *tc,
1589 struct device *dev, struct device *cdev)
1590{
1591 struct Scsi_Host *shost = dev_to_shost(dev);
1592 struct iscsi_cls_host *ihost = shost->shost_data;
1593
1594 bsg_remove_queue(ihost->bsg_q);
1595 return 0;
1596}
1597
1598static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1599 "iscsi_host",
1600 iscsi_setup_host,
1601 iscsi_remove_host,
1602 NULL);
1603
1604static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1605 "iscsi_session",
1606 NULL,
1607 NULL,
1608 NULL);
1609
1610static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1611 "iscsi_connection",
1612 NULL,
1613 NULL,
1614 NULL);
1615
1616static struct sock *nls;
1617static DEFINE_MUTEX(rx_queue_mutex);
1618
1619
1620
1621
1622
1623static DEFINE_MUTEX(conn_mutex);
1624
1625static LIST_HEAD(sesslist);
1626static DEFINE_SPINLOCK(sesslock);
1627static LIST_HEAD(connlist);
1628static LIST_HEAD(connlist_err);
1629static DEFINE_SPINLOCK(connlock);
1630
1631static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1632{
1633 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1634 return sess->sid;
1635}
1636
1637
1638
1639
1640static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1641{
1642 unsigned long flags;
1643 struct iscsi_cls_session *sess;
1644
1645 spin_lock_irqsave(&sesslock, flags);
1646 list_for_each_entry(sess, &sesslist, sess_list) {
1647 if (sess->sid == sid) {
1648 spin_unlock_irqrestore(&sesslock, flags);
1649 return sess;
1650 }
1651 }
1652 spin_unlock_irqrestore(&sesslock, flags);
1653 return NULL;
1654}
1655
1656
1657
1658
1659static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1660{
1661 unsigned long flags;
1662 struct iscsi_cls_conn *conn;
1663
1664 spin_lock_irqsave(&connlock, flags);
1665 list_for_each_entry(conn, &connlist, conn_list) {
1666 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1667 spin_unlock_irqrestore(&connlock, flags);
1668 return conn;
1669 }
1670 }
1671 spin_unlock_irqrestore(&connlock, flags);
1672 return NULL;
1673}
1674
1675
1676
1677
1678
1679static struct {
1680 int value;
1681 char *name;
1682} iscsi_session_state_names[] = {
1683 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1684 { ISCSI_SESSION_FAILED, "FAILED" },
1685 { ISCSI_SESSION_FREE, "FREE" },
1686};
1687
1688static const char *iscsi_session_state_name(int state)
1689{
1690 int i;
1691 char *name = NULL;
1692
1693 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1694 if (iscsi_session_state_names[i].value == state) {
1695 name = iscsi_session_state_names[i].name;
1696 break;
1697 }
1698 }
1699 return name;
1700}
1701
1702int iscsi_session_chkready(struct iscsi_cls_session *session)
1703{
1704 unsigned long flags;
1705 int err;
1706
1707 spin_lock_irqsave(&session->lock, flags);
1708 switch (session->state) {
1709 case ISCSI_SESSION_LOGGED_IN:
1710 err = 0;
1711 break;
1712 case ISCSI_SESSION_FAILED:
1713 err = DID_IMM_RETRY << 16;
1714 break;
1715 case ISCSI_SESSION_FREE:
1716 err = DID_TRANSPORT_FAILFAST << 16;
1717 break;
1718 default:
1719 err = DID_NO_CONNECT << 16;
1720 break;
1721 }
1722 spin_unlock_irqrestore(&session->lock, flags);
1723 return err;
1724}
1725EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1726
1727int iscsi_is_session_online(struct iscsi_cls_session *session)
1728{
1729 unsigned long flags;
1730 int ret = 0;
1731
1732 spin_lock_irqsave(&session->lock, flags);
1733 if (session->state == ISCSI_SESSION_LOGGED_IN)
1734 ret = 1;
1735 spin_unlock_irqrestore(&session->lock, flags);
1736 return ret;
1737}
1738EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1739
1740static void iscsi_session_release(struct device *dev)
1741{
1742 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1743 struct Scsi_Host *shost;
1744
1745 shost = iscsi_session_to_shost(session);
1746 scsi_host_put(shost);
1747 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1748 kfree(session);
1749}
1750
1751int iscsi_is_session_dev(const struct device *dev)
1752{
1753 return dev->release == iscsi_session_release;
1754}
1755EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1756
1757static int iscsi_iter_session_fn(struct device *dev, void *data)
1758{
1759 void (* fn) (struct iscsi_cls_session *) = data;
1760
1761 if (!iscsi_is_session_dev(dev))
1762 return 0;
1763 fn(iscsi_dev_to_session(dev));
1764 return 0;
1765}
1766
1767void iscsi_host_for_each_session(struct Scsi_Host *shost,
1768 void (*fn)(struct iscsi_cls_session *))
1769{
1770 device_for_each_child(&shost->shost_gendev, fn,
1771 iscsi_iter_session_fn);
1772}
1773EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1784{
1785 struct iscsi_cls_host *ihost = shost->shost_data;
1786
1787
1788
1789
1790 return !atomic_read(&ihost->nr_scans);
1791}
1792EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1793
1794struct iscsi_scan_data {
1795 unsigned int channel;
1796 unsigned int id;
1797 u64 lun;
1798 enum scsi_scan_mode rescan;
1799};
1800
1801static int iscsi_user_scan_session(struct device *dev, void *data)
1802{
1803 struct iscsi_scan_data *scan_data = data;
1804 struct iscsi_cls_session *session;
1805 struct Scsi_Host *shost;
1806 struct iscsi_cls_host *ihost;
1807 unsigned long flags;
1808 unsigned int id;
1809
1810 if (!iscsi_is_session_dev(dev))
1811 return 0;
1812
1813 session = iscsi_dev_to_session(dev);
1814
1815 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1816
1817 shost = iscsi_session_to_shost(session);
1818 ihost = shost->shost_data;
1819
1820 mutex_lock(&ihost->mutex);
1821 spin_lock_irqsave(&session->lock, flags);
1822 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1823 spin_unlock_irqrestore(&session->lock, flags);
1824 goto user_scan_exit;
1825 }
1826 id = session->target_id;
1827 spin_unlock_irqrestore(&session->lock, flags);
1828
1829 if (id != ISCSI_MAX_TARGET) {
1830 if ((scan_data->channel == SCAN_WILD_CARD ||
1831 scan_data->channel == 0) &&
1832 (scan_data->id == SCAN_WILD_CARD ||
1833 scan_data->id == id))
1834 scsi_scan_target(&session->dev, 0, id,
1835 scan_data->lun, scan_data->rescan);
1836 }
1837
1838user_scan_exit:
1839 mutex_unlock(&ihost->mutex);
1840 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1841 return 0;
1842}
1843
1844static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1845 uint id, u64 lun)
1846{
1847 struct iscsi_scan_data scan_data;
1848
1849 scan_data.channel = channel;
1850 scan_data.id = id;
1851 scan_data.lun = lun;
1852 scan_data.rescan = SCSI_SCAN_MANUAL;
1853
1854 return device_for_each_child(&shost->shost_gendev, &scan_data,
1855 iscsi_user_scan_session);
1856}
1857
1858static void iscsi_scan_session(struct work_struct *work)
1859{
1860 struct iscsi_cls_session *session =
1861 container_of(work, struct iscsi_cls_session, scan_work);
1862 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1863 struct iscsi_cls_host *ihost = shost->shost_data;
1864 struct iscsi_scan_data scan_data;
1865
1866 scan_data.channel = 0;
1867 scan_data.id = SCAN_WILD_CARD;
1868 scan_data.lun = SCAN_WILD_CARD;
1869 scan_data.rescan = SCSI_SCAN_RESCAN;
1870
1871 iscsi_user_scan_session(&session->dev, &scan_data);
1872 atomic_dec(&ihost->nr_scans);
1873}
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1885{
1886 struct iscsi_cls_session *session =
1887 starget_to_session(scsi_target(cmd->device));
1888 unsigned long flags;
1889 int ret = 0;
1890
1891 spin_lock_irqsave(&session->lock, flags);
1892 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1893 if (session->state == ISCSI_SESSION_FREE) {
1894 ret = FAST_IO_FAIL;
1895 break;
1896 }
1897 spin_unlock_irqrestore(&session->lock, flags);
1898 msleep(1000);
1899 spin_lock_irqsave(&session->lock, flags);
1900 }
1901 spin_unlock_irqrestore(&session->lock, flags);
1902 return ret;
1903}
1904EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1905
1906static void session_recovery_timedout(struct work_struct *work)
1907{
1908 struct iscsi_cls_session *session =
1909 container_of(work, struct iscsi_cls_session,
1910 recovery_work.work);
1911 unsigned long flags;
1912
1913 iscsi_cls_session_printk(KERN_INFO, session,
1914 "session recovery timed out after %d secs\n",
1915 session->recovery_tmo);
1916
1917 spin_lock_irqsave(&session->lock, flags);
1918 switch (session->state) {
1919 case ISCSI_SESSION_FAILED:
1920 session->state = ISCSI_SESSION_FREE;
1921 break;
1922 case ISCSI_SESSION_LOGGED_IN:
1923 case ISCSI_SESSION_FREE:
1924
1925 spin_unlock_irqrestore(&session->lock, flags);
1926 return;
1927 }
1928 spin_unlock_irqrestore(&session->lock, flags);
1929
1930 if (session->transport->session_recovery_timedout)
1931 session->transport->session_recovery_timedout(session);
1932
1933 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1934 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1935 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1936}
1937
1938static void __iscsi_unblock_session(struct work_struct *work)
1939{
1940 struct iscsi_cls_session *session =
1941 container_of(work, struct iscsi_cls_session,
1942 unblock_work);
1943 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1944 struct iscsi_cls_host *ihost = shost->shost_data;
1945 unsigned long flags;
1946
1947 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1948
1949
1950
1951
1952 cancel_delayed_work(&session->recovery_work);
1953 spin_lock_irqsave(&session->lock, flags);
1954 session->state = ISCSI_SESSION_LOGGED_IN;
1955 spin_unlock_irqrestore(&session->lock, flags);
1956
1957 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1958
1959
1960
1961
1962
1963 if (shost->hostt->scan_finished) {
1964 if (scsi_queue_work(shost, &session->scan_work))
1965 atomic_inc(&ihost->nr_scans);
1966 }
1967 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1968}
1969
1970
1971
1972
1973
1974
1975
1976void iscsi_unblock_session(struct iscsi_cls_session *session)
1977{
1978 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1979
1980
1981
1982
1983
1984 flush_work(&session->unblock_work);
1985}
1986EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1987
1988static void __iscsi_block_session(struct work_struct *work)
1989{
1990 struct iscsi_cls_session *session =
1991 container_of(work, struct iscsi_cls_session,
1992 block_work);
1993 unsigned long flags;
1994
1995 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1996 spin_lock_irqsave(&session->lock, flags);
1997 session->state = ISCSI_SESSION_FAILED;
1998 spin_unlock_irqrestore(&session->lock, flags);
1999 scsi_target_block(&session->dev);
2000 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
2001 if (session->recovery_tmo >= 0)
2002 queue_delayed_work(iscsi_eh_timer_workq,
2003 &session->recovery_work,
2004 session->recovery_tmo * HZ);
2005}
2006
2007void iscsi_block_session(struct iscsi_cls_session *session)
2008{
2009 queue_work(iscsi_eh_timer_workq, &session->block_work);
2010}
2011EXPORT_SYMBOL_GPL(iscsi_block_session);
2012
2013static void __iscsi_unbind_session(struct work_struct *work)
2014{
2015 struct iscsi_cls_session *session =
2016 container_of(work, struct iscsi_cls_session,
2017 unbind_work);
2018 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2019 struct iscsi_cls_host *ihost = shost->shost_data;
2020 unsigned long flags;
2021 unsigned int target_id;
2022
2023 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2024
2025
2026 mutex_lock(&ihost->mutex);
2027 spin_lock_irqsave(&session->lock, flags);
2028 if (session->target_id == ISCSI_MAX_TARGET) {
2029 spin_unlock_irqrestore(&session->lock, flags);
2030 mutex_unlock(&ihost->mutex);
2031 goto unbind_session_exit;
2032 }
2033
2034 target_id = session->target_id;
2035 session->target_id = ISCSI_MAX_TARGET;
2036 spin_unlock_irqrestore(&session->lock, flags);
2037 mutex_unlock(&ihost->mutex);
2038
2039 scsi_remove_target(&session->dev);
2040
2041 if (session->ida_used)
2042 ida_simple_remove(&iscsi_sess_ida, target_id);
2043
2044unbind_session_exit:
2045 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2046 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2047}
2048
2049static void __iscsi_destroy_session(struct work_struct *work)
2050{
2051 struct iscsi_cls_session *session =
2052 container_of(work, struct iscsi_cls_session, destroy_work);
2053
2054 session->transport->destroy_session(session);
2055}
2056
2057struct iscsi_cls_session *
2058iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2059 int dd_size)
2060{
2061 struct iscsi_cls_session *session;
2062
2063 session = kzalloc(sizeof(*session) + dd_size,
2064 GFP_KERNEL);
2065 if (!session)
2066 return NULL;
2067
2068 session->transport = transport;
2069 session->creator = -1;
2070 session->recovery_tmo = 120;
2071 session->recovery_tmo_sysfs_override = false;
2072 session->state = ISCSI_SESSION_FREE;
2073 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2074 INIT_LIST_HEAD(&session->sess_list);
2075 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2076 INIT_WORK(&session->block_work, __iscsi_block_session);
2077 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2078 INIT_WORK(&session->scan_work, iscsi_scan_session);
2079 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2080 spin_lock_init(&session->lock);
2081
2082
2083 scsi_host_get(shost);
2084 session->dev.parent = &shost->shost_gendev;
2085 session->dev.release = iscsi_session_release;
2086 device_initialize(&session->dev);
2087 if (dd_size)
2088 session->dd_data = &session[1];
2089
2090 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2091 return session;
2092}
2093EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2094
2095int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2096{
2097 unsigned long flags;
2098 int id = 0;
2099 int err;
2100
2101 session->sid = atomic_add_return(1, &iscsi_session_nr);
2102
2103 if (target_id == ISCSI_MAX_TARGET) {
2104 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2105
2106 if (id < 0) {
2107 iscsi_cls_session_printk(KERN_ERR, session,
2108 "Failure in Target ID Allocation\n");
2109 return id;
2110 }
2111 session->target_id = (unsigned int)id;
2112 session->ida_used = true;
2113 } else
2114 session->target_id = target_id;
2115
2116 dev_set_name(&session->dev, "session%u", session->sid);
2117 err = device_add(&session->dev);
2118 if (err) {
2119 iscsi_cls_session_printk(KERN_ERR, session,
2120 "could not register session's dev\n");
2121 goto release_ida;
2122 }
2123 err = transport_register_device(&session->dev);
2124 if (err) {
2125 iscsi_cls_session_printk(KERN_ERR, session,
2126 "could not register transport's dev\n");
2127 goto release_dev;
2128 }
2129
2130 spin_lock_irqsave(&sesslock, flags);
2131 list_add(&session->sess_list, &sesslist);
2132 spin_unlock_irqrestore(&sesslock, flags);
2133
2134 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2135 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2136 return 0;
2137
2138release_dev:
2139 device_del(&session->dev);
2140release_ida:
2141 if (session->ida_used)
2142 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2143
2144 return err;
2145}
2146EXPORT_SYMBOL_GPL(iscsi_add_session);
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157struct iscsi_cls_session *
2158iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2159 int dd_size, unsigned int target_id)
2160{
2161 struct iscsi_cls_session *session;
2162
2163 session = iscsi_alloc_session(shost, transport, dd_size);
2164 if (!session)
2165 return NULL;
2166
2167 if (iscsi_add_session(session, target_id)) {
2168 iscsi_free_session(session);
2169 return NULL;
2170 }
2171 return session;
2172}
2173EXPORT_SYMBOL_GPL(iscsi_create_session);
2174
2175static void iscsi_conn_release(struct device *dev)
2176{
2177 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2178 struct device *parent = conn->dev.parent;
2179
2180 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2181 kfree(conn);
2182 put_device(parent);
2183}
2184
2185static int iscsi_is_conn_dev(const struct device *dev)
2186{
2187 return dev->release == iscsi_conn_release;
2188}
2189
2190static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2191{
2192 if (!iscsi_is_conn_dev(dev))
2193 return 0;
2194 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2195}
2196
2197void iscsi_remove_session(struct iscsi_cls_session *session)
2198{
2199 unsigned long flags;
2200 int err;
2201
2202 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2203
2204 spin_lock_irqsave(&sesslock, flags);
2205 if (!list_empty(&session->sess_list))
2206 list_del(&session->sess_list);
2207 spin_unlock_irqrestore(&sesslock, flags);
2208
2209 flush_work(&session->block_work);
2210 flush_work(&session->unblock_work);
2211 cancel_delayed_work_sync(&session->recovery_work);
2212
2213
2214
2215
2216
2217
2218 spin_lock_irqsave(&session->lock, flags);
2219 session->state = ISCSI_SESSION_FREE;
2220 spin_unlock_irqrestore(&session->lock, flags);
2221
2222 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2223
2224 flush_work(&session->scan_work);
2225
2226 flush_work(&session->unbind_work);
2227 __iscsi_unbind_session(&session->unbind_work);
2228
2229
2230 err = device_for_each_child(&session->dev, NULL,
2231 iscsi_iter_destroy_conn_fn);
2232 if (err)
2233 iscsi_cls_session_printk(KERN_ERR, session,
2234 "Could not delete all connections "
2235 "for session. Error %d.\n", err);
2236
2237 transport_unregister_device(&session->dev);
2238
2239 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2240 device_del(&session->dev);
2241}
2242EXPORT_SYMBOL_GPL(iscsi_remove_session);
2243
2244void iscsi_free_session(struct iscsi_cls_session *session)
2245{
2246 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2247 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2248 put_device(&session->dev);
2249}
2250EXPORT_SYMBOL_GPL(iscsi_free_session);
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267struct iscsi_cls_conn *
2268iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2269{
2270 struct iscsi_transport *transport = session->transport;
2271 struct iscsi_cls_conn *conn;
2272 unsigned long flags;
2273 int err;
2274
2275 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2276 if (!conn)
2277 return NULL;
2278 if (dd_size)
2279 conn->dd_data = &conn[1];
2280
2281 mutex_init(&conn->ep_mutex);
2282 INIT_LIST_HEAD(&conn->conn_list);
2283 INIT_LIST_HEAD(&conn->conn_list_err);
2284 conn->transport = transport;
2285 conn->cid = cid;
2286 conn->state = ISCSI_CONN_DOWN;
2287
2288
2289 if (!get_device(&session->dev))
2290 goto free_conn;
2291
2292 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2293 conn->dev.parent = &session->dev;
2294 conn->dev.release = iscsi_conn_release;
2295 err = device_register(&conn->dev);
2296 if (err) {
2297 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2298 "register connection's dev\n");
2299 goto release_parent_ref;
2300 }
2301 err = transport_register_device(&conn->dev);
2302 if (err) {
2303 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2304 "register transport's dev\n");
2305 goto release_conn_ref;
2306 }
2307
2308 spin_lock_irqsave(&connlock, flags);
2309 list_add(&conn->conn_list, &connlist);
2310 spin_unlock_irqrestore(&connlock, flags);
2311
2312 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2313 return conn;
2314
2315release_conn_ref:
2316 put_device(&conn->dev);
2317release_parent_ref:
2318 put_device(&session->dev);
2319free_conn:
2320 kfree(conn);
2321 return NULL;
2322}
2323
2324EXPORT_SYMBOL_GPL(iscsi_create_conn);
2325
2326
2327
2328
2329
2330
2331
2332int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2333{
2334 unsigned long flags;
2335
2336 spin_lock_irqsave(&connlock, flags);
2337 list_del(&conn->conn_list);
2338 list_del(&conn->conn_list_err);
2339 spin_unlock_irqrestore(&connlock, flags);
2340
2341 transport_unregister_device(&conn->dev);
2342 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2343 device_unregister(&conn->dev);
2344 return 0;
2345}
2346EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2347
2348
2349
2350
2351static struct iscsi_internal *
2352iscsi_if_transport_lookup(struct iscsi_transport *tt)
2353{
2354 struct iscsi_internal *priv;
2355 unsigned long flags;
2356
2357 spin_lock_irqsave(&iscsi_transport_lock, flags);
2358 list_for_each_entry(priv, &iscsi_transports, list) {
2359 if (tt == priv->iscsi_transport) {
2360 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2361 return priv;
2362 }
2363 }
2364 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2365 return NULL;
2366}
2367
2368static int
2369iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2370{
2371 return nlmsg_multicast(nls, skb, 0, group, gfp);
2372}
2373
2374static int
2375iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2376{
2377 return nlmsg_unicast(nls, skb, portid);
2378}
2379
2380int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2381 char *data, uint32_t data_size)
2382{
2383 struct nlmsghdr *nlh;
2384 struct sk_buff *skb;
2385 struct iscsi_uevent *ev;
2386 char *pdu;
2387 struct iscsi_internal *priv;
2388 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2389 data_size);
2390
2391 priv = iscsi_if_transport_lookup(conn->transport);
2392 if (!priv)
2393 return -EINVAL;
2394
2395 skb = alloc_skb(len, GFP_ATOMIC);
2396 if (!skb) {
2397 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2398 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2399 "control PDU: OOM\n");
2400 return -ENOMEM;
2401 }
2402
2403 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2404 ev = nlmsg_data(nlh);
2405 memset(ev, 0, sizeof(*ev));
2406 ev->transport_handle = iscsi_handle(conn->transport);
2407 ev->type = ISCSI_KEVENT_RECV_PDU;
2408 ev->r.recv_req.cid = conn->cid;
2409 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2410 pdu = (char*)ev + sizeof(*ev);
2411 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2412 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2413
2414 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2415}
2416EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2417
2418int iscsi_offload_mesg(struct Scsi_Host *shost,
2419 struct iscsi_transport *transport, uint32_t type,
2420 char *data, uint16_t data_size)
2421{
2422 struct nlmsghdr *nlh;
2423 struct sk_buff *skb;
2424 struct iscsi_uevent *ev;
2425 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2426
2427 skb = alloc_skb(len, GFP_ATOMIC);
2428 if (!skb) {
2429 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2430 return -ENOMEM;
2431 }
2432
2433 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2434 ev = nlmsg_data(nlh);
2435 memset(ev, 0, sizeof(*ev));
2436 ev->type = type;
2437 ev->transport_handle = iscsi_handle(transport);
2438 switch (type) {
2439 case ISCSI_KEVENT_PATH_REQ:
2440 ev->r.req_path.host_no = shost->host_no;
2441 break;
2442 case ISCSI_KEVENT_IF_DOWN:
2443 ev->r.notify_if_down.host_no = shost->host_no;
2444 break;
2445 }
2446
2447 memcpy((char *)ev + sizeof(*ev), data, data_size);
2448
2449 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2450}
2451EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2452
2453
2454
2455
2456
2457
2458static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag)
2459{
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473 mutex_lock(&conn_mutex);
2474 conn->transport->stop_conn(conn, flag);
2475 mutex_unlock(&conn_mutex);
2476
2477}
2478
2479static void stop_conn_work_fn(struct work_struct *work)
2480{
2481 struct iscsi_cls_conn *conn, *tmp;
2482 unsigned long flags;
2483 LIST_HEAD(recovery_list);
2484
2485 spin_lock_irqsave(&connlock, flags);
2486 if (list_empty(&connlist_err)) {
2487 spin_unlock_irqrestore(&connlock, flags);
2488 return;
2489 }
2490 list_splice_init(&connlist_err, &recovery_list);
2491 spin_unlock_irqrestore(&connlock, flags);
2492
2493 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) {
2494 uint32_t sid = iscsi_conn_get_sid(conn);
2495 struct iscsi_cls_session *session;
2496
2497 session = iscsi_session_lookup(sid);
2498 if (session) {
2499 if (system_state != SYSTEM_RUNNING) {
2500 session->recovery_tmo = 0;
2501 iscsi_if_stop_conn(conn, STOP_CONN_TERM);
2502 } else {
2503 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER);
2504 }
2505 }
2506
2507 list_del_init(&conn->conn_list_err);
2508 }
2509}
2510
2511void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2512{
2513 struct nlmsghdr *nlh;
2514 struct sk_buff *skb;
2515 struct iscsi_uevent *ev;
2516 struct iscsi_internal *priv;
2517 int len = nlmsg_total_size(sizeof(*ev));
2518 unsigned long flags;
2519
2520 spin_lock_irqsave(&connlock, flags);
2521 list_add(&conn->conn_list_err, &connlist_err);
2522 spin_unlock_irqrestore(&connlock, flags);
2523 queue_work(system_unbound_wq, &stop_conn_work);
2524
2525 priv = iscsi_if_transport_lookup(conn->transport);
2526 if (!priv)
2527 return;
2528
2529 skb = alloc_skb(len, GFP_ATOMIC);
2530 if (!skb) {
2531 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2532 "conn error (%d)\n", error);
2533 return;
2534 }
2535
2536 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2537 ev = nlmsg_data(nlh);
2538 ev->transport_handle = iscsi_handle(conn->transport);
2539 ev->type = ISCSI_KEVENT_CONN_ERROR;
2540 ev->r.connerror.error = error;
2541 ev->r.connerror.cid = conn->cid;
2542 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2543
2544 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2545
2546 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2547 error);
2548}
2549EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2550
2551void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2552 enum iscsi_conn_state state)
2553{
2554 struct nlmsghdr *nlh;
2555 struct sk_buff *skb;
2556 struct iscsi_uevent *ev;
2557 struct iscsi_internal *priv;
2558 int len = nlmsg_total_size(sizeof(*ev));
2559
2560 priv = iscsi_if_transport_lookup(conn->transport);
2561 if (!priv)
2562 return;
2563
2564 skb = alloc_skb(len, GFP_ATOMIC);
2565 if (!skb) {
2566 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2567 "conn login (%d)\n", state);
2568 return;
2569 }
2570
2571 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2572 ev = nlmsg_data(nlh);
2573 ev->transport_handle = iscsi_handle(conn->transport);
2574 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2575 ev->r.conn_login.state = state;
2576 ev->r.conn_login.cid = conn->cid;
2577 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2578 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2579
2580 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2581 state);
2582}
2583EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2584
2585void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2586 enum iscsi_host_event_code code, uint32_t data_size,
2587 uint8_t *data)
2588{
2589 struct nlmsghdr *nlh;
2590 struct sk_buff *skb;
2591 struct iscsi_uevent *ev;
2592 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2593
2594 skb = alloc_skb(len, GFP_NOIO);
2595 if (!skb) {
2596 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2597 host_no, code);
2598 return;
2599 }
2600
2601 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2602 ev = nlmsg_data(nlh);
2603 ev->transport_handle = iscsi_handle(transport);
2604 ev->type = ISCSI_KEVENT_HOST_EVENT;
2605 ev->r.host_event.host_no = host_no;
2606 ev->r.host_event.code = code;
2607 ev->r.host_event.data_size = data_size;
2608
2609 if (data_size)
2610 memcpy((char *)ev + sizeof(*ev), data, data_size);
2611
2612 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2613}
2614EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2615
2616void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2617 uint32_t status, uint32_t pid, uint32_t data_size,
2618 uint8_t *data)
2619{
2620 struct nlmsghdr *nlh;
2621 struct sk_buff *skb;
2622 struct iscsi_uevent *ev;
2623 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2624
2625 skb = alloc_skb(len, GFP_NOIO);
2626 if (!skb) {
2627 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2628 return;
2629 }
2630
2631 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2632 ev = nlmsg_data(nlh);
2633 ev->transport_handle = iscsi_handle(transport);
2634 ev->type = ISCSI_KEVENT_PING_COMP;
2635 ev->r.ping_comp.host_no = host_no;
2636 ev->r.ping_comp.status = status;
2637 ev->r.ping_comp.pid = pid;
2638 ev->r.ping_comp.data_size = data_size;
2639 memcpy((char *)ev + sizeof(*ev), data, data_size);
2640
2641 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2642}
2643EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2644
2645static int
2646iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2647{
2648 struct sk_buff *skb;
2649 struct nlmsghdr *nlh;
2650 int len = nlmsg_total_size(size);
2651
2652 skb = alloc_skb(len, GFP_ATOMIC);
2653 if (!skb) {
2654 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2655 return -ENOMEM;
2656 }
2657
2658 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2659 memcpy(nlmsg_data(nlh), payload, size);
2660 return iscsi_unicast_skb(skb, portid);
2661}
2662
2663static int
2664iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2665{
2666 struct iscsi_uevent *ev = nlmsg_data(nlh);
2667 struct iscsi_stats *stats;
2668 struct sk_buff *skbstat;
2669 struct iscsi_cls_conn *conn;
2670 struct nlmsghdr *nlhstat;
2671 struct iscsi_uevent *evstat;
2672 struct iscsi_internal *priv;
2673 int len = nlmsg_total_size(sizeof(*ev) +
2674 sizeof(struct iscsi_stats) +
2675 sizeof(struct iscsi_stats_custom) *
2676 ISCSI_STATS_CUSTOM_MAX);
2677 int err = 0;
2678
2679 priv = iscsi_if_transport_lookup(transport);
2680 if (!priv)
2681 return -EINVAL;
2682
2683 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2684 if (!conn)
2685 return -EEXIST;
2686
2687 do {
2688 int actual_size;
2689
2690 skbstat = alloc_skb(len, GFP_ATOMIC);
2691 if (!skbstat) {
2692 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2693 "deliver stats: OOM\n");
2694 return -ENOMEM;
2695 }
2696
2697 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2698 (len - sizeof(*nlhstat)), 0);
2699 evstat = nlmsg_data(nlhstat);
2700 memset(evstat, 0, sizeof(*evstat));
2701 evstat->transport_handle = iscsi_handle(conn->transport);
2702 evstat->type = nlh->nlmsg_type;
2703 evstat->u.get_stats.cid =
2704 ev->u.get_stats.cid;
2705 evstat->u.get_stats.sid =
2706 ev->u.get_stats.sid;
2707 stats = (struct iscsi_stats *)
2708 ((char*)evstat + sizeof(*evstat));
2709 memset(stats, 0, sizeof(*stats));
2710
2711 transport->get_stats(conn, stats);
2712 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2713 sizeof(struct iscsi_stats) +
2714 sizeof(struct iscsi_stats_custom) *
2715 stats->custom_length);
2716 actual_size -= sizeof(*nlhstat);
2717 actual_size = nlmsg_msg_size(actual_size);
2718 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2719 nlhstat->nlmsg_len = actual_size;
2720
2721 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2722 GFP_ATOMIC);
2723 } while (err < 0 && err != -ECONNREFUSED);
2724
2725 return err;
2726}
2727
2728
2729
2730
2731
2732
2733int iscsi_session_event(struct iscsi_cls_session *session,
2734 enum iscsi_uevent_e event)
2735{
2736 struct iscsi_internal *priv;
2737 struct Scsi_Host *shost;
2738 struct iscsi_uevent *ev;
2739 struct sk_buff *skb;
2740 struct nlmsghdr *nlh;
2741 int rc, len = nlmsg_total_size(sizeof(*ev));
2742
2743 priv = iscsi_if_transport_lookup(session->transport);
2744 if (!priv)
2745 return -EINVAL;
2746 shost = iscsi_session_to_shost(session);
2747
2748 skb = alloc_skb(len, GFP_KERNEL);
2749 if (!skb) {
2750 iscsi_cls_session_printk(KERN_ERR, session,
2751 "Cannot notify userspace of session "
2752 "event %u\n", event);
2753 return -ENOMEM;
2754 }
2755
2756 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2757 ev = nlmsg_data(nlh);
2758 ev->transport_handle = iscsi_handle(session->transport);
2759
2760 ev->type = event;
2761 switch (event) {
2762 case ISCSI_KEVENT_DESTROY_SESSION:
2763 ev->r.d_session.host_no = shost->host_no;
2764 ev->r.d_session.sid = session->sid;
2765 break;
2766 case ISCSI_KEVENT_CREATE_SESSION:
2767 ev->r.c_session_ret.host_no = shost->host_no;
2768 ev->r.c_session_ret.sid = session->sid;
2769 break;
2770 case ISCSI_KEVENT_UNBIND_SESSION:
2771 ev->r.unbind_session.host_no = shost->host_no;
2772 ev->r.unbind_session.sid = session->sid;
2773 break;
2774 default:
2775 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2776 "%u.\n", event);
2777 kfree_skb(skb);
2778 return -EINVAL;
2779 }
2780
2781
2782
2783
2784
2785 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2786 if (rc == -ESRCH)
2787 iscsi_cls_session_printk(KERN_ERR, session,
2788 "Cannot notify userspace of session "
2789 "event %u. Check iscsi daemon\n",
2790 event);
2791
2792 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2793 event, rc);
2794 return rc;
2795}
2796EXPORT_SYMBOL_GPL(iscsi_session_event);
2797
2798static int
2799iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2800 struct iscsi_uevent *ev, pid_t pid,
2801 uint32_t initial_cmdsn, uint16_t cmds_max,
2802 uint16_t queue_depth)
2803{
2804 struct iscsi_transport *transport = priv->iscsi_transport;
2805 struct iscsi_cls_session *session;
2806 struct Scsi_Host *shost;
2807
2808 session = transport->create_session(ep, cmds_max, queue_depth,
2809 initial_cmdsn);
2810 if (!session)
2811 return -ENOMEM;
2812
2813 session->creator = pid;
2814 shost = iscsi_session_to_shost(session);
2815 ev->r.c_session_ret.host_no = shost->host_no;
2816 ev->r.c_session_ret.sid = session->sid;
2817 ISCSI_DBG_TRANS_SESSION(session,
2818 "Completed creating transport session\n");
2819 return 0;
2820}
2821
2822static int
2823iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2824{
2825 struct iscsi_cls_conn *conn;
2826 struct iscsi_cls_session *session;
2827
2828 session = iscsi_session_lookup(ev->u.c_conn.sid);
2829 if (!session) {
2830 printk(KERN_ERR "iscsi: invalid session %d.\n",
2831 ev->u.c_conn.sid);
2832 return -EINVAL;
2833 }
2834
2835 conn = transport->create_conn(session, ev->u.c_conn.cid);
2836 if (!conn) {
2837 iscsi_cls_session_printk(KERN_ERR, session,
2838 "couldn't create a new connection.");
2839 return -ENOMEM;
2840 }
2841
2842 ev->r.c_conn_ret.sid = session->sid;
2843 ev->r.c_conn_ret.cid = conn->cid;
2844
2845 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2846 return 0;
2847}
2848
2849static int
2850iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2851{
2852 struct iscsi_cls_conn *conn;
2853 unsigned long flags;
2854
2855 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2856 if (!conn)
2857 return -EINVAL;
2858
2859 spin_lock_irqsave(&connlock, flags);
2860 if (!list_empty(&conn->conn_list_err)) {
2861 spin_unlock_irqrestore(&connlock, flags);
2862 return -EAGAIN;
2863 }
2864 spin_unlock_irqrestore(&connlock, flags);
2865
2866 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2867
2868 mutex_lock(&conn_mutex);
2869 if (transport->destroy_conn)
2870 transport->destroy_conn(conn);
2871 mutex_unlock(&conn_mutex);
2872
2873 return 0;
2874}
2875
2876static int
2877iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2878{
2879 char *data = (char*)ev + sizeof(*ev);
2880 struct iscsi_cls_conn *conn;
2881 struct iscsi_cls_session *session;
2882 int err = 0, value = 0;
2883
2884 session = iscsi_session_lookup(ev->u.set_param.sid);
2885 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2886 if (!conn || !session)
2887 return -EINVAL;
2888
2889 switch (ev->u.set_param.param) {
2890 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2891 sscanf(data, "%d", &value);
2892 if (!session->recovery_tmo_sysfs_override)
2893 session->recovery_tmo = value;
2894 break;
2895 default:
2896 err = transport->set_param(conn, ev->u.set_param.param,
2897 data, ev->u.set_param.len);
2898 }
2899
2900 return err;
2901}
2902
2903static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2904 struct iscsi_uevent *ev, int msg_type)
2905{
2906 struct iscsi_endpoint *ep;
2907 struct sockaddr *dst_addr;
2908 struct Scsi_Host *shost = NULL;
2909 int non_blocking, err = 0;
2910
2911 if (!transport->ep_connect)
2912 return -EINVAL;
2913
2914 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2915 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2916 if (!shost) {
2917 printk(KERN_ERR "ep connect failed. Could not find "
2918 "host no %u\n",
2919 ev->u.ep_connect_through_host.host_no);
2920 return -ENODEV;
2921 }
2922 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2923 } else
2924 non_blocking = ev->u.ep_connect.non_blocking;
2925
2926 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2927 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2928 if (IS_ERR(ep)) {
2929 err = PTR_ERR(ep);
2930 goto release_host;
2931 }
2932
2933 ev->r.ep_connect_ret.handle = ep->id;
2934release_host:
2935 if (shost)
2936 scsi_host_put(shost);
2937 return err;
2938}
2939
2940static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2941 u64 ep_handle)
2942{
2943 struct iscsi_cls_conn *conn;
2944 struct iscsi_endpoint *ep;
2945
2946 if (!transport->ep_disconnect)
2947 return -EINVAL;
2948
2949 ep = iscsi_lookup_endpoint(ep_handle);
2950 if (!ep)
2951 return -EINVAL;
2952 conn = ep->conn;
2953 if (conn) {
2954 mutex_lock(&conn->ep_mutex);
2955 conn->ep = NULL;
2956 mutex_unlock(&conn->ep_mutex);
2957 }
2958
2959 transport->ep_disconnect(ep);
2960 return 0;
2961}
2962
2963static int
2964iscsi_if_transport_ep(struct iscsi_transport *transport,
2965 struct iscsi_uevent *ev, int msg_type)
2966{
2967 struct iscsi_endpoint *ep;
2968 int rc = 0;
2969
2970 switch (msg_type) {
2971 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2972 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2973 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2974 break;
2975 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2976 if (!transport->ep_poll)
2977 return -EINVAL;
2978
2979 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2980 if (!ep)
2981 return -EINVAL;
2982
2983 ev->r.retcode = transport->ep_poll(ep,
2984 ev->u.ep_poll.timeout_ms);
2985 break;
2986 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2987 rc = iscsi_if_ep_disconnect(transport,
2988 ev->u.ep_disconnect.ep_handle);
2989 break;
2990 }
2991 return rc;
2992}
2993
2994static int
2995iscsi_tgt_dscvr(struct iscsi_transport *transport,
2996 struct iscsi_uevent *ev)
2997{
2998 struct Scsi_Host *shost;
2999 struct sockaddr *dst_addr;
3000 int err;
3001
3002 if (!transport->tgt_dscvr)
3003 return -EINVAL;
3004
3005 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3006 if (!shost) {
3007 printk(KERN_ERR "target discovery could not find host no %u\n",
3008 ev->u.tgt_dscvr.host_no);
3009 return -ENODEV;
3010 }
3011
3012
3013 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3014 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3015 ev->u.tgt_dscvr.enable, dst_addr);
3016 scsi_host_put(shost);
3017 return err;
3018}
3019
3020static int
3021iscsi_set_host_param(struct iscsi_transport *transport,
3022 struct iscsi_uevent *ev)
3023{
3024 char *data = (char*)ev + sizeof(*ev);
3025 struct Scsi_Host *shost;
3026 int err;
3027
3028 if (!transport->set_host_param)
3029 return -ENOSYS;
3030
3031 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3032 if (!shost) {
3033 printk(KERN_ERR "set_host_param could not find host no %u\n",
3034 ev->u.set_host_param.host_no);
3035 return -ENODEV;
3036 }
3037
3038 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3039 data, ev->u.set_host_param.len);
3040 scsi_host_put(shost);
3041 return err;
3042}
3043
3044static int
3045iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3046{
3047 struct Scsi_Host *shost;
3048 struct iscsi_path *params;
3049 int err;
3050
3051 if (!transport->set_path)
3052 return -ENOSYS;
3053
3054 shost = scsi_host_lookup(ev->u.set_path.host_no);
3055 if (!shost) {
3056 printk(KERN_ERR "set path could not find host no %u\n",
3057 ev->u.set_path.host_no);
3058 return -ENODEV;
3059 }
3060
3061 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3062 err = transport->set_path(shost, params);
3063
3064 scsi_host_put(shost);
3065 return err;
3066}
3067
3068static int iscsi_session_has_conns(int sid)
3069{
3070 struct iscsi_cls_conn *conn;
3071 unsigned long flags;
3072 int found = 0;
3073
3074 spin_lock_irqsave(&connlock, flags);
3075 list_for_each_entry(conn, &connlist, conn_list) {
3076 if (iscsi_conn_get_sid(conn) == sid) {
3077 found = 1;
3078 break;
3079 }
3080 }
3081 spin_unlock_irqrestore(&connlock, flags);
3082
3083 return found;
3084}
3085
3086static int
3087iscsi_set_iface_params(struct iscsi_transport *transport,
3088 struct iscsi_uevent *ev, uint32_t len)
3089{
3090 char *data = (char *)ev + sizeof(*ev);
3091 struct Scsi_Host *shost;
3092 int err;
3093
3094 if (!transport->set_iface_param)
3095 return -ENOSYS;
3096
3097 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3098 if (!shost) {
3099 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3100 ev->u.set_iface_params.host_no);
3101 return -ENODEV;
3102 }
3103
3104 err = transport->set_iface_param(shost, data, len);
3105 scsi_host_put(shost);
3106 return err;
3107}
3108
3109static int
3110iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3111{
3112 struct Scsi_Host *shost;
3113 struct sockaddr *dst_addr;
3114 int err;
3115
3116 if (!transport->send_ping)
3117 return -ENOSYS;
3118
3119 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3120 if (!shost) {
3121 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3122 ev->u.iscsi_ping.host_no);
3123 return -ENODEV;
3124 }
3125
3126 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3127 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3128 ev->u.iscsi_ping.iface_type,
3129 ev->u.iscsi_ping.payload_size,
3130 ev->u.iscsi_ping.pid,
3131 dst_addr);
3132 scsi_host_put(shost);
3133 return err;
3134}
3135
3136static int
3137iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3138{
3139 struct iscsi_uevent *ev = nlmsg_data(nlh);
3140 struct Scsi_Host *shost = NULL;
3141 struct iscsi_chap_rec *chap_rec;
3142 struct iscsi_internal *priv;
3143 struct sk_buff *skbchap;
3144 struct nlmsghdr *nlhchap;
3145 struct iscsi_uevent *evchap;
3146 uint32_t chap_buf_size;
3147 int len, err = 0;
3148 char *buf;
3149
3150 if (!transport->get_chap)
3151 return -EINVAL;
3152
3153 priv = iscsi_if_transport_lookup(transport);
3154 if (!priv)
3155 return -EINVAL;
3156
3157 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3158 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3159
3160 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3161 if (!shost) {
3162 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3163 __func__, ev->u.get_chap.host_no);
3164 return -ENODEV;
3165 }
3166
3167 do {
3168 int actual_size;
3169
3170 skbchap = alloc_skb(len, GFP_KERNEL);
3171 if (!skbchap) {
3172 printk(KERN_ERR "can not deliver chap: OOM\n");
3173 err = -ENOMEM;
3174 goto exit_get_chap;
3175 }
3176
3177 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3178 (len - sizeof(*nlhchap)), 0);
3179 evchap = nlmsg_data(nlhchap);
3180 memset(evchap, 0, sizeof(*evchap));
3181 evchap->transport_handle = iscsi_handle(transport);
3182 evchap->type = nlh->nlmsg_type;
3183 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3184 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3185 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3186 buf = (char *)evchap + sizeof(*evchap);
3187 memset(buf, 0, chap_buf_size);
3188
3189 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3190 &evchap->u.get_chap.num_entries, buf);
3191
3192 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3193 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3194 nlhchap->nlmsg_len = actual_size;
3195
3196 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3197 GFP_KERNEL);
3198 } while (err < 0 && err != -ECONNREFUSED);
3199
3200exit_get_chap:
3201 scsi_host_put(shost);
3202 return err;
3203}
3204
3205static int iscsi_set_chap(struct iscsi_transport *transport,
3206 struct iscsi_uevent *ev, uint32_t len)
3207{
3208 char *data = (char *)ev + sizeof(*ev);
3209 struct Scsi_Host *shost;
3210 int err = 0;
3211
3212 if (!transport->set_chap)
3213 return -ENOSYS;
3214
3215 shost = scsi_host_lookup(ev->u.set_path.host_no);
3216 if (!shost) {
3217 pr_err("%s could not find host no %u\n",
3218 __func__, ev->u.set_path.host_no);
3219 return -ENODEV;
3220 }
3221
3222 err = transport->set_chap(shost, data, len);
3223 scsi_host_put(shost);
3224 return err;
3225}
3226
3227static int iscsi_delete_chap(struct iscsi_transport *transport,
3228 struct iscsi_uevent *ev)
3229{
3230 struct Scsi_Host *shost;
3231 int err = 0;
3232
3233 if (!transport->delete_chap)
3234 return -ENOSYS;
3235
3236 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3237 if (!shost) {
3238 printk(KERN_ERR "%s could not find host no %u\n",
3239 __func__, ev->u.delete_chap.host_no);
3240 return -ENODEV;
3241 }
3242
3243 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3244 scsi_host_put(shost);
3245 return err;
3246}
3247
3248static const struct {
3249 enum iscsi_discovery_parent_type value;
3250 char *name;
3251} iscsi_discovery_parent_names[] = {
3252 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3253 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3254 {ISCSI_DISC_PARENT_ISNS, "isns" },
3255};
3256
3257char *iscsi_get_discovery_parent_name(int parent_type)
3258{
3259 int i;
3260 char *state = "Unknown!";
3261
3262 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3263 if (iscsi_discovery_parent_names[i].value & parent_type) {
3264 state = iscsi_discovery_parent_names[i].name;
3265 break;
3266 }
3267 }
3268 return state;
3269}
3270EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3271
3272static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3273 struct iscsi_uevent *ev, uint32_t len)
3274{
3275 char *data = (char *)ev + sizeof(*ev);
3276 struct Scsi_Host *shost;
3277 struct iscsi_bus_flash_session *fnode_sess;
3278 struct iscsi_bus_flash_conn *fnode_conn;
3279 struct device *dev;
3280 uint32_t idx;
3281 int err = 0;
3282
3283 if (!transport->set_flashnode_param) {
3284 err = -ENOSYS;
3285 goto exit_set_fnode;
3286 }
3287
3288 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3289 if (!shost) {
3290 pr_err("%s could not find host no %u\n",
3291 __func__, ev->u.set_flashnode.host_no);
3292 err = -ENODEV;
3293 goto exit_set_fnode;
3294 }
3295
3296 idx = ev->u.set_flashnode.flashnode_idx;
3297 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3298 if (!fnode_sess) {
3299 pr_err("%s could not find flashnode %u for host no %u\n",
3300 __func__, idx, ev->u.set_flashnode.host_no);
3301 err = -ENODEV;
3302 goto put_host;
3303 }
3304
3305 dev = iscsi_find_flashnode_conn(fnode_sess);
3306 if (!dev) {
3307 err = -ENODEV;
3308 goto put_sess;
3309 }
3310
3311 fnode_conn = iscsi_dev_to_flash_conn(dev);
3312 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3313 put_device(dev);
3314
3315put_sess:
3316 put_device(&fnode_sess->dev);
3317
3318put_host:
3319 scsi_host_put(shost);
3320
3321exit_set_fnode:
3322 return err;
3323}
3324
3325static int iscsi_new_flashnode(struct iscsi_transport *transport,
3326 struct iscsi_uevent *ev, uint32_t len)
3327{
3328 char *data = (char *)ev + sizeof(*ev);
3329 struct Scsi_Host *shost;
3330 int index;
3331 int err = 0;
3332
3333 if (!transport->new_flashnode) {
3334 err = -ENOSYS;
3335 goto exit_new_fnode;
3336 }
3337
3338 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3339 if (!shost) {
3340 pr_err("%s could not find host no %u\n",
3341 __func__, ev->u.new_flashnode.host_no);
3342 err = -ENODEV;
3343 goto put_host;
3344 }
3345
3346 index = transport->new_flashnode(shost, data, len);
3347
3348 if (index >= 0)
3349 ev->r.new_flashnode_ret.flashnode_idx = index;
3350 else
3351 err = -EIO;
3352
3353put_host:
3354 scsi_host_put(shost);
3355
3356exit_new_fnode:
3357 return err;
3358}
3359
3360static int iscsi_del_flashnode(struct iscsi_transport *transport,
3361 struct iscsi_uevent *ev)
3362{
3363 struct Scsi_Host *shost;
3364 struct iscsi_bus_flash_session *fnode_sess;
3365 uint32_t idx;
3366 int err = 0;
3367
3368 if (!transport->del_flashnode) {
3369 err = -ENOSYS;
3370 goto exit_del_fnode;
3371 }
3372
3373 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3374 if (!shost) {
3375 pr_err("%s could not find host no %u\n",
3376 __func__, ev->u.del_flashnode.host_no);
3377 err = -ENODEV;
3378 goto put_host;
3379 }
3380
3381 idx = ev->u.del_flashnode.flashnode_idx;
3382 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3383 if (!fnode_sess) {
3384 pr_err("%s could not find flashnode %u for host no %u\n",
3385 __func__, idx, ev->u.del_flashnode.host_no);
3386 err = -ENODEV;
3387 goto put_host;
3388 }
3389
3390 err = transport->del_flashnode(fnode_sess);
3391 put_device(&fnode_sess->dev);
3392
3393put_host:
3394 scsi_host_put(shost);
3395
3396exit_del_fnode:
3397 return err;
3398}
3399
3400static int iscsi_login_flashnode(struct iscsi_transport *transport,
3401 struct iscsi_uevent *ev)
3402{
3403 struct Scsi_Host *shost;
3404 struct iscsi_bus_flash_session *fnode_sess;
3405 struct iscsi_bus_flash_conn *fnode_conn;
3406 struct device *dev;
3407 uint32_t idx;
3408 int err = 0;
3409
3410 if (!transport->login_flashnode) {
3411 err = -ENOSYS;
3412 goto exit_login_fnode;
3413 }
3414
3415 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3416 if (!shost) {
3417 pr_err("%s could not find host no %u\n",
3418 __func__, ev->u.login_flashnode.host_no);
3419 err = -ENODEV;
3420 goto put_host;
3421 }
3422
3423 idx = ev->u.login_flashnode.flashnode_idx;
3424 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3425 if (!fnode_sess) {
3426 pr_err("%s could not find flashnode %u for host no %u\n",
3427 __func__, idx, ev->u.login_flashnode.host_no);
3428 err = -ENODEV;
3429 goto put_host;
3430 }
3431
3432 dev = iscsi_find_flashnode_conn(fnode_sess);
3433 if (!dev) {
3434 err = -ENODEV;
3435 goto put_sess;
3436 }
3437
3438 fnode_conn = iscsi_dev_to_flash_conn(dev);
3439 err = transport->login_flashnode(fnode_sess, fnode_conn);
3440 put_device(dev);
3441
3442put_sess:
3443 put_device(&fnode_sess->dev);
3444
3445put_host:
3446 scsi_host_put(shost);
3447
3448exit_login_fnode:
3449 return err;
3450}
3451
3452static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3453 struct iscsi_uevent *ev)
3454{
3455 struct Scsi_Host *shost;
3456 struct iscsi_bus_flash_session *fnode_sess;
3457 struct iscsi_bus_flash_conn *fnode_conn;
3458 struct device *dev;
3459 uint32_t idx;
3460 int err = 0;
3461
3462 if (!transport->logout_flashnode) {
3463 err = -ENOSYS;
3464 goto exit_logout_fnode;
3465 }
3466
3467 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3468 if (!shost) {
3469 pr_err("%s could not find host no %u\n",
3470 __func__, ev->u.logout_flashnode.host_no);
3471 err = -ENODEV;
3472 goto put_host;
3473 }
3474
3475 idx = ev->u.logout_flashnode.flashnode_idx;
3476 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3477 if (!fnode_sess) {
3478 pr_err("%s could not find flashnode %u for host no %u\n",
3479 __func__, idx, ev->u.logout_flashnode.host_no);
3480 err = -ENODEV;
3481 goto put_host;
3482 }
3483
3484 dev = iscsi_find_flashnode_conn(fnode_sess);
3485 if (!dev) {
3486 err = -ENODEV;
3487 goto put_sess;
3488 }
3489
3490 fnode_conn = iscsi_dev_to_flash_conn(dev);
3491
3492 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3493 put_device(dev);
3494
3495put_sess:
3496 put_device(&fnode_sess->dev);
3497
3498put_host:
3499 scsi_host_put(shost);
3500
3501exit_logout_fnode:
3502 return err;
3503}
3504
3505static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3506 struct iscsi_uevent *ev)
3507{
3508 struct Scsi_Host *shost;
3509 struct iscsi_cls_session *session;
3510 int err = 0;
3511
3512 if (!transport->logout_flashnode_sid) {
3513 err = -ENOSYS;
3514 goto exit_logout_sid;
3515 }
3516
3517 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3518 if (!shost) {
3519 pr_err("%s could not find host no %u\n",
3520 __func__, ev->u.logout_flashnode.host_no);
3521 err = -ENODEV;
3522 goto put_host;
3523 }
3524
3525 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3526 if (!session) {
3527 pr_err("%s could not find session id %u\n",
3528 __func__, ev->u.logout_flashnode_sid.sid);
3529 err = -EINVAL;
3530 goto put_host;
3531 }
3532
3533 err = transport->logout_flashnode_sid(session);
3534
3535put_host:
3536 scsi_host_put(shost);
3537
3538exit_logout_sid:
3539 return err;
3540}
3541
3542static int
3543iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3544{
3545 struct iscsi_uevent *ev = nlmsg_data(nlh);
3546 struct Scsi_Host *shost = NULL;
3547 struct iscsi_internal *priv;
3548 struct sk_buff *skbhost_stats;
3549 struct nlmsghdr *nlhhost_stats;
3550 struct iscsi_uevent *evhost_stats;
3551 int host_stats_size = 0;
3552 int len, err = 0;
3553 char *buf;
3554
3555 if (!transport->get_host_stats)
3556 return -ENOSYS;
3557
3558 priv = iscsi_if_transport_lookup(transport);
3559 if (!priv)
3560 return -EINVAL;
3561
3562 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3563 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3564
3565 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3566 if (!shost) {
3567 pr_err("%s: failed. Could not find host no %u\n",
3568 __func__, ev->u.get_host_stats.host_no);
3569 return -ENODEV;
3570 }
3571
3572 do {
3573 int actual_size;
3574
3575 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3576 if (!skbhost_stats) {
3577 pr_err("cannot deliver host stats: OOM\n");
3578 err = -ENOMEM;
3579 goto exit_host_stats;
3580 }
3581
3582 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3583 (len - sizeof(*nlhhost_stats)), 0);
3584 evhost_stats = nlmsg_data(nlhhost_stats);
3585 memset(evhost_stats, 0, sizeof(*evhost_stats));
3586 evhost_stats->transport_handle = iscsi_handle(transport);
3587 evhost_stats->type = nlh->nlmsg_type;
3588 evhost_stats->u.get_host_stats.host_no =
3589 ev->u.get_host_stats.host_no;
3590 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3591 memset(buf, 0, host_stats_size);
3592
3593 err = transport->get_host_stats(shost, buf, host_stats_size);
3594 if (err) {
3595 kfree_skb(skbhost_stats);
3596 goto exit_host_stats;
3597 }
3598
3599 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3600 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3601 nlhhost_stats->nlmsg_len = actual_size;
3602
3603 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3604 GFP_KERNEL);
3605 } while (err < 0 && err != -ECONNREFUSED);
3606
3607exit_host_stats:
3608 scsi_host_put(shost);
3609 return err;
3610}
3611
3612
3613static int
3614iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3615{
3616 int err = 0;
3617 u32 portid;
3618 struct iscsi_uevent *ev = nlmsg_data(nlh);
3619 struct iscsi_transport *transport = NULL;
3620 struct iscsi_internal *priv;
3621 struct iscsi_cls_session *session;
3622 struct iscsi_cls_conn *conn;
3623 struct iscsi_endpoint *ep = NULL;
3624
3625 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3626 *group = ISCSI_NL_GRP_UIP;
3627 else
3628 *group = ISCSI_NL_GRP_ISCSID;
3629
3630 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3631 if (!priv)
3632 return -EINVAL;
3633 transport = priv->iscsi_transport;
3634
3635 if (!try_module_get(transport->owner))
3636 return -EINVAL;
3637
3638 portid = NETLINK_CB(skb).portid;
3639
3640 switch (nlh->nlmsg_type) {
3641 case ISCSI_UEVENT_CREATE_SESSION:
3642 err = iscsi_if_create_session(priv, ep, ev,
3643 portid,
3644 ev->u.c_session.initial_cmdsn,
3645 ev->u.c_session.cmds_max,
3646 ev->u.c_session.queue_depth);
3647 break;
3648 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3649 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3650 if (!ep) {
3651 err = -EINVAL;
3652 break;
3653 }
3654
3655 err = iscsi_if_create_session(priv, ep, ev,
3656 portid,
3657 ev->u.c_bound_session.initial_cmdsn,
3658 ev->u.c_bound_session.cmds_max,
3659 ev->u.c_bound_session.queue_depth);
3660 break;
3661 case ISCSI_UEVENT_DESTROY_SESSION:
3662 session = iscsi_session_lookup(ev->u.d_session.sid);
3663 if (!session)
3664 err = -EINVAL;
3665 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3666 err = -EBUSY;
3667 else
3668 transport->destroy_session(session);
3669 break;
3670 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3671 session = iscsi_session_lookup(ev->u.d_session.sid);
3672 if (!session)
3673 err = -EINVAL;
3674 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3675 err = -EBUSY;
3676 else {
3677 unsigned long flags;
3678
3679
3680 spin_lock_irqsave(&sesslock, flags);
3681 list_del_init(&session->sess_list);
3682 spin_unlock_irqrestore(&sesslock, flags);
3683
3684 queue_work(iscsi_destroy_workq, &session->destroy_work);
3685 }
3686 break;
3687 case ISCSI_UEVENT_UNBIND_SESSION:
3688 session = iscsi_session_lookup(ev->u.d_session.sid);
3689 if (session)
3690 scsi_queue_work(iscsi_session_to_shost(session),
3691 &session->unbind_work);
3692 else
3693 err = -EINVAL;
3694 break;
3695 case ISCSI_UEVENT_CREATE_CONN:
3696 err = iscsi_if_create_conn(transport, ev);
3697 break;
3698 case ISCSI_UEVENT_DESTROY_CONN:
3699 err = iscsi_if_destroy_conn(transport, ev);
3700 break;
3701 case ISCSI_UEVENT_BIND_CONN:
3702 session = iscsi_session_lookup(ev->u.b_conn.sid);
3703 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3704
3705 if (conn && conn->ep)
3706 iscsi_if_ep_disconnect(transport, conn->ep->id);
3707
3708 if (!session || !conn) {
3709 err = -EINVAL;
3710 break;
3711 }
3712
3713 mutex_lock(&conn_mutex);
3714 ev->r.retcode = transport->bind_conn(session, conn,
3715 ev->u.b_conn.transport_eph,
3716 ev->u.b_conn.is_leading);
3717 mutex_unlock(&conn_mutex);
3718
3719 if (ev->r.retcode || !transport->ep_connect)
3720 break;
3721
3722 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3723 if (ep) {
3724 ep->conn = conn;
3725
3726 mutex_lock(&conn->ep_mutex);
3727 conn->ep = ep;
3728 mutex_unlock(&conn->ep_mutex);
3729 } else
3730 iscsi_cls_conn_printk(KERN_ERR, conn,
3731 "Could not set ep conn "
3732 "binding\n");
3733 break;
3734 case ISCSI_UEVENT_SET_PARAM:
3735 err = iscsi_set_param(transport, ev);
3736 break;
3737 case ISCSI_UEVENT_START_CONN:
3738 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3739 if (conn) {
3740 mutex_lock(&conn_mutex);
3741 ev->r.retcode = transport->start_conn(conn);
3742 if (!ev->r.retcode)
3743 conn->state = ISCSI_CONN_UP;
3744 mutex_unlock(&conn_mutex);
3745 }
3746 else
3747 err = -EINVAL;
3748 break;
3749 case ISCSI_UEVENT_STOP_CONN:
3750 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3751 if (conn)
3752 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag);
3753 else
3754 err = -EINVAL;
3755 break;
3756 case ISCSI_UEVENT_SEND_PDU:
3757 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3758 if (conn) {
3759 mutex_lock(&conn_mutex);
3760 ev->r.retcode = transport->send_pdu(conn,
3761 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3762 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3763 ev->u.send_pdu.data_size);
3764 mutex_unlock(&conn_mutex);
3765 }
3766 else
3767 err = -EINVAL;
3768 break;
3769 case ISCSI_UEVENT_GET_STATS:
3770 err = iscsi_if_get_stats(transport, nlh);
3771 break;
3772 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3773 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3774 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3775 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3776 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3777 break;
3778 case ISCSI_UEVENT_TGT_DSCVR:
3779 err = iscsi_tgt_dscvr(transport, ev);
3780 break;
3781 case ISCSI_UEVENT_SET_HOST_PARAM:
3782 err = iscsi_set_host_param(transport, ev);
3783 break;
3784 case ISCSI_UEVENT_PATH_UPDATE:
3785 err = iscsi_set_path(transport, ev);
3786 break;
3787 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3788 err = iscsi_set_iface_params(transport, ev,
3789 nlmsg_attrlen(nlh, sizeof(*ev)));
3790 break;
3791 case ISCSI_UEVENT_PING:
3792 err = iscsi_send_ping(transport, ev);
3793 break;
3794 case ISCSI_UEVENT_GET_CHAP:
3795 err = iscsi_get_chap(transport, nlh);
3796 break;
3797 case ISCSI_UEVENT_DELETE_CHAP:
3798 err = iscsi_delete_chap(transport, ev);
3799 break;
3800 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3801 err = iscsi_set_flashnode_param(transport, ev,
3802 nlmsg_attrlen(nlh,
3803 sizeof(*ev)));
3804 break;
3805 case ISCSI_UEVENT_NEW_FLASHNODE:
3806 err = iscsi_new_flashnode(transport, ev,
3807 nlmsg_attrlen(nlh, sizeof(*ev)));
3808 break;
3809 case ISCSI_UEVENT_DEL_FLASHNODE:
3810 err = iscsi_del_flashnode(transport, ev);
3811 break;
3812 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3813 err = iscsi_login_flashnode(transport, ev);
3814 break;
3815 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3816 err = iscsi_logout_flashnode(transport, ev);
3817 break;
3818 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3819 err = iscsi_logout_flashnode_sid(transport, ev);
3820 break;
3821 case ISCSI_UEVENT_SET_CHAP:
3822 err = iscsi_set_chap(transport, ev,
3823 nlmsg_attrlen(nlh, sizeof(*ev)));
3824 break;
3825 case ISCSI_UEVENT_GET_HOST_STATS:
3826 err = iscsi_get_host_stats(transport, nlh);
3827 break;
3828 default:
3829 err = -ENOSYS;
3830 break;
3831 }
3832
3833 module_put(transport->owner);
3834 return err;
3835}
3836
3837
3838
3839
3840
3841static void
3842iscsi_if_rx(struct sk_buff *skb)
3843{
3844 u32 portid = NETLINK_CB(skb).portid;
3845
3846 mutex_lock(&rx_queue_mutex);
3847 while (skb->len >= NLMSG_HDRLEN) {
3848 int err;
3849 uint32_t rlen;
3850 struct nlmsghdr *nlh;
3851 struct iscsi_uevent *ev;
3852 uint32_t group;
3853 int retries = ISCSI_SEND_MAX_ALLOWED;
3854
3855 nlh = nlmsg_hdr(skb);
3856 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3857 skb->len < nlh->nlmsg_len) {
3858 break;
3859 }
3860
3861 ev = nlmsg_data(nlh);
3862 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3863 if (rlen > skb->len)
3864 rlen = skb->len;
3865
3866 err = iscsi_if_recv_msg(skb, nlh, &group);
3867 if (err) {
3868 ev->type = ISCSI_KEVENT_IF_ERROR;
3869 ev->iferror = err;
3870 }
3871 do {
3872
3873
3874
3875
3876
3877
3878 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3879 break;
3880 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3881 break;
3882 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3883 ev, sizeof(*ev));
3884 if (err == -EAGAIN && --retries < 0) {
3885 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3886 break;
3887 }
3888 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3889 skb_pull(skb, rlen);
3890 }
3891 mutex_unlock(&rx_queue_mutex);
3892}
3893
3894#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3895struct device_attribute dev_attr_##_prefix##_##_name = \
3896 __ATTR(_name,_mode,_show,_store)
3897
3898
3899
3900
3901#define iscsi_conn_attr_show(param) \
3902static ssize_t \
3903show_conn_param_##param(struct device *dev, \
3904 struct device_attribute *attr, char *buf) \
3905{ \
3906 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3907 struct iscsi_transport *t = conn->transport; \
3908 return t->get_conn_param(conn, param, buf); \
3909}
3910
3911#define iscsi_conn_attr(field, param) \
3912 iscsi_conn_attr_show(param) \
3913static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3914 NULL);
3915
3916iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3917iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3918iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3919iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3920iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3921iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3922iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3923iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3924iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3925iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3926iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3927iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3928iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3929iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3930iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3931iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3932iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3933iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3934iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3935iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3936iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3937iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3938iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3939iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3940iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3941iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3942iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3943iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3944
3945static const char *const connection_state_names[] = {
3946 [ISCSI_CONN_UP] = "up",
3947 [ISCSI_CONN_DOWN] = "down",
3948 [ISCSI_CONN_FAILED] = "failed"
3949};
3950
3951static ssize_t show_conn_state(struct device *dev,
3952 struct device_attribute *attr, char *buf)
3953{
3954 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
3955 const char *state = "unknown";
3956
3957 if (conn->state >= 0 &&
3958 conn->state < ARRAY_SIZE(connection_state_names))
3959 state = connection_state_names[conn->state];
3960
3961 return sprintf(buf, "%s\n", state);
3962}
3963static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
3964 NULL);
3965
3966#define iscsi_conn_ep_attr_show(param) \
3967static ssize_t show_conn_ep_param_##param(struct device *dev, \
3968 struct device_attribute *attr,\
3969 char *buf) \
3970{ \
3971 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3972 struct iscsi_transport *t = conn->transport; \
3973 struct iscsi_endpoint *ep; \
3974 ssize_t rc; \
3975 \
3976
3977
3978
3979 \
3980 mutex_lock(&conn->ep_mutex); \
3981 ep = conn->ep; \
3982 if (!ep && t->ep_connect) { \
3983 mutex_unlock(&conn->ep_mutex); \
3984 return -ENOTCONN; \
3985 } \
3986 \
3987 if (ep) \
3988 rc = t->get_ep_param(ep, param, buf); \
3989 else \
3990 rc = t->get_conn_param(conn, param, buf); \
3991 mutex_unlock(&conn->ep_mutex); \
3992 return rc; \
3993}
3994
3995#define iscsi_conn_ep_attr(field, param) \
3996 iscsi_conn_ep_attr_show(param) \
3997static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3998 show_conn_ep_param_##param, NULL);
3999
4000iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
4001iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
4002
4003static struct attribute *iscsi_conn_attrs[] = {
4004 &dev_attr_conn_max_recv_dlength.attr,
4005 &dev_attr_conn_max_xmit_dlength.attr,
4006 &dev_attr_conn_header_digest.attr,
4007 &dev_attr_conn_data_digest.attr,
4008 &dev_attr_conn_ifmarker.attr,
4009 &dev_attr_conn_ofmarker.attr,
4010 &dev_attr_conn_address.attr,
4011 &dev_attr_conn_port.attr,
4012 &dev_attr_conn_exp_statsn.attr,
4013 &dev_attr_conn_persistent_address.attr,
4014 &dev_attr_conn_persistent_port.attr,
4015 &dev_attr_conn_ping_tmo.attr,
4016 &dev_attr_conn_recv_tmo.attr,
4017 &dev_attr_conn_local_port.attr,
4018 &dev_attr_conn_statsn.attr,
4019 &dev_attr_conn_keepalive_tmo.attr,
4020 &dev_attr_conn_max_segment_size.attr,
4021 &dev_attr_conn_tcp_timestamp_stat.attr,
4022 &dev_attr_conn_tcp_wsf_disable.attr,
4023 &dev_attr_conn_tcp_nagle_disable.attr,
4024 &dev_attr_conn_tcp_timer_scale.attr,
4025 &dev_attr_conn_tcp_timestamp_enable.attr,
4026 &dev_attr_conn_fragment_disable.attr,
4027 &dev_attr_conn_ipv4_tos.attr,
4028 &dev_attr_conn_ipv6_traffic_class.attr,
4029 &dev_attr_conn_ipv6_flow_label.attr,
4030 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4031 &dev_attr_conn_tcp_xmit_wsf.attr,
4032 &dev_attr_conn_tcp_recv_wsf.attr,
4033 &dev_attr_conn_local_ipaddr.attr,
4034 &dev_attr_conn_state.attr,
4035 NULL,
4036};
4037
4038static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4039 struct attribute *attr, int i)
4040{
4041 struct device *cdev = container_of(kobj, struct device, kobj);
4042 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4043 struct iscsi_transport *t = conn->transport;
4044 int param;
4045
4046 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4047 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4048 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4049 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4050 else if (attr == &dev_attr_conn_header_digest.attr)
4051 param = ISCSI_PARAM_HDRDGST_EN;
4052 else if (attr == &dev_attr_conn_data_digest.attr)
4053 param = ISCSI_PARAM_DATADGST_EN;
4054 else if (attr == &dev_attr_conn_ifmarker.attr)
4055 param = ISCSI_PARAM_IFMARKER_EN;
4056 else if (attr == &dev_attr_conn_ofmarker.attr)
4057 param = ISCSI_PARAM_OFMARKER_EN;
4058 else if (attr == &dev_attr_conn_address.attr)
4059 param = ISCSI_PARAM_CONN_ADDRESS;
4060 else if (attr == &dev_attr_conn_port.attr)
4061 param = ISCSI_PARAM_CONN_PORT;
4062 else if (attr == &dev_attr_conn_exp_statsn.attr)
4063 param = ISCSI_PARAM_EXP_STATSN;
4064 else if (attr == &dev_attr_conn_persistent_address.attr)
4065 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4066 else if (attr == &dev_attr_conn_persistent_port.attr)
4067 param = ISCSI_PARAM_PERSISTENT_PORT;
4068 else if (attr == &dev_attr_conn_ping_tmo.attr)
4069 param = ISCSI_PARAM_PING_TMO;
4070 else if (attr == &dev_attr_conn_recv_tmo.attr)
4071 param = ISCSI_PARAM_RECV_TMO;
4072 else if (attr == &dev_attr_conn_local_port.attr)
4073 param = ISCSI_PARAM_LOCAL_PORT;
4074 else if (attr == &dev_attr_conn_statsn.attr)
4075 param = ISCSI_PARAM_STATSN;
4076 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4077 param = ISCSI_PARAM_KEEPALIVE_TMO;
4078 else if (attr == &dev_attr_conn_max_segment_size.attr)
4079 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4080 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4081 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4082 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4083 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4084 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4085 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4086 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4087 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4088 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4089 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4090 else if (attr == &dev_attr_conn_fragment_disable.attr)
4091 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4092 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4093 param = ISCSI_PARAM_IPV4_TOS;
4094 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4095 param = ISCSI_PARAM_IPV6_TC;
4096 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4097 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4098 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4099 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4100 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4101 param = ISCSI_PARAM_TCP_XMIT_WSF;
4102 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4103 param = ISCSI_PARAM_TCP_RECV_WSF;
4104 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4105 param = ISCSI_PARAM_LOCAL_IPADDR;
4106 else if (attr == &dev_attr_conn_state.attr)
4107 return S_IRUGO;
4108 else {
4109 WARN_ONCE(1, "Invalid conn attr");
4110 return 0;
4111 }
4112
4113 return t->attr_is_visible(ISCSI_PARAM, param);
4114}
4115
4116static struct attribute_group iscsi_conn_group = {
4117 .attrs = iscsi_conn_attrs,
4118 .is_visible = iscsi_conn_attr_is_visible,
4119};
4120
4121
4122
4123
4124#define iscsi_session_attr_show(param, perm) \
4125static ssize_t \
4126show_session_param_##param(struct device *dev, \
4127 struct device_attribute *attr, char *buf) \
4128{ \
4129 struct iscsi_cls_session *session = \
4130 iscsi_dev_to_session(dev->parent); \
4131 struct iscsi_transport *t = session->transport; \
4132 \
4133 if (perm && !capable(CAP_SYS_ADMIN)) \
4134 return -EACCES; \
4135 return t->get_session_param(session, param, buf); \
4136}
4137
4138#define iscsi_session_attr(field, param, perm) \
4139 iscsi_session_attr_show(param, perm) \
4140static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4141 NULL);
4142iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4143iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4144iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4145iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4146iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4147iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4148iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4149iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4150iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4151iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4152iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4153iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4154iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4155iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4156iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4157iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4158iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4159iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4160iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4161iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4162iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4163iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4164iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4165iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4166iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4167iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4168iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4169iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4170iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4171iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4172iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4173iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4174iscsi_session_attr(discovery_auth_optional,
4175 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4176iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4177iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4178iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4179iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4180iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4181iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4182iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4183
4184static ssize_t
4185show_priv_session_state(struct device *dev, struct device_attribute *attr,
4186 char *buf)
4187{
4188 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4189 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4190}
4191static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4192 NULL);
4193static ssize_t
4194show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4195 char *buf)
4196{
4197 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4198 return sprintf(buf, "%d\n", session->creator);
4199}
4200static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4201 NULL);
4202static ssize_t
4203show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4204 char *buf)
4205{
4206 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4207 return sprintf(buf, "%d\n", session->target_id);
4208}
4209static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4210 show_priv_session_target_id, NULL);
4211
4212#define iscsi_priv_session_attr_show(field, format) \
4213static ssize_t \
4214show_priv_session_##field(struct device *dev, \
4215 struct device_attribute *attr, char *buf) \
4216{ \
4217 struct iscsi_cls_session *session = \
4218 iscsi_dev_to_session(dev->parent); \
4219 if (session->field == -1) \
4220 return sprintf(buf, "off\n"); \
4221 return sprintf(buf, format"\n", session->field); \
4222}
4223
4224#define iscsi_priv_session_attr_store(field) \
4225static ssize_t \
4226store_priv_session_##field(struct device *dev, \
4227 struct device_attribute *attr, \
4228 const char *buf, size_t count) \
4229{ \
4230 int val; \
4231 char *cp; \
4232 struct iscsi_cls_session *session = \
4233 iscsi_dev_to_session(dev->parent); \
4234 if ((session->state == ISCSI_SESSION_FREE) || \
4235 (session->state == ISCSI_SESSION_FAILED)) \
4236 return -EBUSY; \
4237 if (strncmp(buf, "off", 3) == 0) { \
4238 session->field = -1; \
4239 session->field##_sysfs_override = true; \
4240 } else { \
4241 val = simple_strtoul(buf, &cp, 0); \
4242 if (*cp != '\0' && *cp != '\n') \
4243 return -EINVAL; \
4244 session->field = val; \
4245 session->field##_sysfs_override = true; \
4246 } \
4247 return count; \
4248}
4249
4250#define iscsi_priv_session_rw_attr(field, format) \
4251 iscsi_priv_session_attr_show(field, format) \
4252 iscsi_priv_session_attr_store(field) \
4253static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4254 show_priv_session_##field, \
4255 store_priv_session_##field)
4256
4257iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4258
4259static struct attribute *iscsi_session_attrs[] = {
4260 &dev_attr_sess_initial_r2t.attr,
4261 &dev_attr_sess_max_outstanding_r2t.attr,
4262 &dev_attr_sess_immediate_data.attr,
4263 &dev_attr_sess_first_burst_len.attr,
4264 &dev_attr_sess_max_burst_len.attr,
4265 &dev_attr_sess_data_pdu_in_order.attr,
4266 &dev_attr_sess_data_seq_in_order.attr,
4267 &dev_attr_sess_erl.attr,
4268 &dev_attr_sess_targetname.attr,
4269 &dev_attr_sess_tpgt.attr,
4270 &dev_attr_sess_password.attr,
4271 &dev_attr_sess_password_in.attr,
4272 &dev_attr_sess_username.attr,
4273 &dev_attr_sess_username_in.attr,
4274 &dev_attr_sess_fast_abort.attr,
4275 &dev_attr_sess_abort_tmo.attr,
4276 &dev_attr_sess_lu_reset_tmo.attr,
4277 &dev_attr_sess_tgt_reset_tmo.attr,
4278 &dev_attr_sess_ifacename.attr,
4279 &dev_attr_sess_initiatorname.attr,
4280 &dev_attr_sess_targetalias.attr,
4281 &dev_attr_sess_boot_root.attr,
4282 &dev_attr_sess_boot_nic.attr,
4283 &dev_attr_sess_boot_target.attr,
4284 &dev_attr_priv_sess_recovery_tmo.attr,
4285 &dev_attr_priv_sess_state.attr,
4286 &dev_attr_priv_sess_creator.attr,
4287 &dev_attr_sess_chap_out_idx.attr,
4288 &dev_attr_sess_chap_in_idx.attr,
4289 &dev_attr_priv_sess_target_id.attr,
4290 &dev_attr_sess_auto_snd_tgt_disable.attr,
4291 &dev_attr_sess_discovery_session.attr,
4292 &dev_attr_sess_portal_type.attr,
4293 &dev_attr_sess_chap_auth.attr,
4294 &dev_attr_sess_discovery_logout.attr,
4295 &dev_attr_sess_bidi_chap.attr,
4296 &dev_attr_sess_discovery_auth_optional.attr,
4297 &dev_attr_sess_def_time2wait.attr,
4298 &dev_attr_sess_def_time2retain.attr,
4299 &dev_attr_sess_isid.attr,
4300 &dev_attr_sess_tsid.attr,
4301 &dev_attr_sess_def_taskmgmt_tmo.attr,
4302 &dev_attr_sess_discovery_parent_idx.attr,
4303 &dev_attr_sess_discovery_parent_type.attr,
4304 NULL,
4305};
4306
4307static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4308 struct attribute *attr, int i)
4309{
4310 struct device *cdev = container_of(kobj, struct device, kobj);
4311 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4312 struct iscsi_transport *t = session->transport;
4313 int param;
4314
4315 if (attr == &dev_attr_sess_initial_r2t.attr)
4316 param = ISCSI_PARAM_INITIAL_R2T_EN;
4317 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4318 param = ISCSI_PARAM_MAX_R2T;
4319 else if (attr == &dev_attr_sess_immediate_data.attr)
4320 param = ISCSI_PARAM_IMM_DATA_EN;
4321 else if (attr == &dev_attr_sess_first_burst_len.attr)
4322 param = ISCSI_PARAM_FIRST_BURST;
4323 else if (attr == &dev_attr_sess_max_burst_len.attr)
4324 param = ISCSI_PARAM_MAX_BURST;
4325 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4326 param = ISCSI_PARAM_PDU_INORDER_EN;
4327 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4328 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4329 else if (attr == &dev_attr_sess_erl.attr)
4330 param = ISCSI_PARAM_ERL;
4331 else if (attr == &dev_attr_sess_targetname.attr)
4332 param = ISCSI_PARAM_TARGET_NAME;
4333 else if (attr == &dev_attr_sess_tpgt.attr)
4334 param = ISCSI_PARAM_TPGT;
4335 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4336 param = ISCSI_PARAM_CHAP_IN_IDX;
4337 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4338 param = ISCSI_PARAM_CHAP_OUT_IDX;
4339 else if (attr == &dev_attr_sess_password.attr)
4340 param = ISCSI_PARAM_USERNAME;
4341 else if (attr == &dev_attr_sess_password_in.attr)
4342 param = ISCSI_PARAM_USERNAME_IN;
4343 else if (attr == &dev_attr_sess_username.attr)
4344 param = ISCSI_PARAM_PASSWORD;
4345 else if (attr == &dev_attr_sess_username_in.attr)
4346 param = ISCSI_PARAM_PASSWORD_IN;
4347 else if (attr == &dev_attr_sess_fast_abort.attr)
4348 param = ISCSI_PARAM_FAST_ABORT;
4349 else if (attr == &dev_attr_sess_abort_tmo.attr)
4350 param = ISCSI_PARAM_ABORT_TMO;
4351 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4352 param = ISCSI_PARAM_LU_RESET_TMO;
4353 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4354 param = ISCSI_PARAM_TGT_RESET_TMO;
4355 else if (attr == &dev_attr_sess_ifacename.attr)
4356 param = ISCSI_PARAM_IFACE_NAME;
4357 else if (attr == &dev_attr_sess_initiatorname.attr)
4358 param = ISCSI_PARAM_INITIATOR_NAME;
4359 else if (attr == &dev_attr_sess_targetalias.attr)
4360 param = ISCSI_PARAM_TARGET_ALIAS;
4361 else if (attr == &dev_attr_sess_boot_root.attr)
4362 param = ISCSI_PARAM_BOOT_ROOT;
4363 else if (attr == &dev_attr_sess_boot_nic.attr)
4364 param = ISCSI_PARAM_BOOT_NIC;
4365 else if (attr == &dev_attr_sess_boot_target.attr)
4366 param = ISCSI_PARAM_BOOT_TARGET;
4367 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4368 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4369 else if (attr == &dev_attr_sess_discovery_session.attr)
4370 param = ISCSI_PARAM_DISCOVERY_SESS;
4371 else if (attr == &dev_attr_sess_portal_type.attr)
4372 param = ISCSI_PARAM_PORTAL_TYPE;
4373 else if (attr == &dev_attr_sess_chap_auth.attr)
4374 param = ISCSI_PARAM_CHAP_AUTH_EN;
4375 else if (attr == &dev_attr_sess_discovery_logout.attr)
4376 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4377 else if (attr == &dev_attr_sess_bidi_chap.attr)
4378 param = ISCSI_PARAM_BIDI_CHAP_EN;
4379 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4380 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4381 else if (attr == &dev_attr_sess_def_time2wait.attr)
4382 param = ISCSI_PARAM_DEF_TIME2WAIT;
4383 else if (attr == &dev_attr_sess_def_time2retain.attr)
4384 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4385 else if (attr == &dev_attr_sess_isid.attr)
4386 param = ISCSI_PARAM_ISID;
4387 else if (attr == &dev_attr_sess_tsid.attr)
4388 param = ISCSI_PARAM_TSID;
4389 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4390 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4391 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4392 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4393 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4394 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4395 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4396 return S_IRUGO | S_IWUSR;
4397 else if (attr == &dev_attr_priv_sess_state.attr)
4398 return S_IRUGO;
4399 else if (attr == &dev_attr_priv_sess_creator.attr)
4400 return S_IRUGO;
4401 else if (attr == &dev_attr_priv_sess_target_id.attr)
4402 return S_IRUGO;
4403 else {
4404 WARN_ONCE(1, "Invalid session attr");
4405 return 0;
4406 }
4407
4408 return t->attr_is_visible(ISCSI_PARAM, param);
4409}
4410
4411static struct attribute_group iscsi_session_group = {
4412 .attrs = iscsi_session_attrs,
4413 .is_visible = iscsi_session_attr_is_visible,
4414};
4415
4416
4417
4418
4419#define iscsi_host_attr_show(param) \
4420static ssize_t \
4421show_host_param_##param(struct device *dev, \
4422 struct device_attribute *attr, char *buf) \
4423{ \
4424 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4425 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4426 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4427}
4428
4429#define iscsi_host_attr(field, param) \
4430 iscsi_host_attr_show(param) \
4431static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4432 NULL);
4433
4434iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4435iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4436iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4437iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4438iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4439iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4440
4441static struct attribute *iscsi_host_attrs[] = {
4442 &dev_attr_host_netdev.attr,
4443 &dev_attr_host_hwaddress.attr,
4444 &dev_attr_host_ipaddress.attr,
4445 &dev_attr_host_initiatorname.attr,
4446 &dev_attr_host_port_state.attr,
4447 &dev_attr_host_port_speed.attr,
4448 NULL,
4449};
4450
4451static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4452 struct attribute *attr, int i)
4453{
4454 struct device *cdev = container_of(kobj, struct device, kobj);
4455 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4456 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4457 int param;
4458
4459 if (attr == &dev_attr_host_netdev.attr)
4460 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4461 else if (attr == &dev_attr_host_hwaddress.attr)
4462 param = ISCSI_HOST_PARAM_HWADDRESS;
4463 else if (attr == &dev_attr_host_ipaddress.attr)
4464 param = ISCSI_HOST_PARAM_IPADDRESS;
4465 else if (attr == &dev_attr_host_initiatorname.attr)
4466 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4467 else if (attr == &dev_attr_host_port_state.attr)
4468 param = ISCSI_HOST_PARAM_PORT_STATE;
4469 else if (attr == &dev_attr_host_port_speed.attr)
4470 param = ISCSI_HOST_PARAM_PORT_SPEED;
4471 else {
4472 WARN_ONCE(1, "Invalid host attr");
4473 return 0;
4474 }
4475
4476 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4477}
4478
4479static struct attribute_group iscsi_host_group = {
4480 .attrs = iscsi_host_attrs,
4481 .is_visible = iscsi_host_attr_is_visible,
4482};
4483
4484
4485static const struct {
4486 enum iscsi_port_speed value;
4487 char *name;
4488} iscsi_port_speed_names[] = {
4489 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4490 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4491 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4492 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4493 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4494 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4495 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4496};
4497
4498char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4499{
4500 int i;
4501 char *speed = "Unknown!";
4502 struct iscsi_cls_host *ihost = shost->shost_data;
4503 uint32_t port_speed = ihost->port_speed;
4504
4505 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4506 if (iscsi_port_speed_names[i].value & port_speed) {
4507 speed = iscsi_port_speed_names[i].name;
4508 break;
4509 }
4510 }
4511 return speed;
4512}
4513EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4514
4515
4516static const struct {
4517 enum iscsi_port_state value;
4518 char *name;
4519} iscsi_port_state_names[] = {
4520 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4521 {ISCSI_PORT_STATE_UP, "LINK UP" },
4522};
4523
4524char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4525{
4526 int i;
4527 char *state = "Unknown!";
4528 struct iscsi_cls_host *ihost = shost->shost_data;
4529 uint32_t port_state = ihost->port_state;
4530
4531 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4532 if (iscsi_port_state_names[i].value & port_state) {
4533 state = iscsi_port_state_names[i].name;
4534 break;
4535 }
4536 }
4537 return state;
4538}
4539EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4540
4541static int iscsi_session_match(struct attribute_container *cont,
4542 struct device *dev)
4543{
4544 struct iscsi_cls_session *session;
4545 struct Scsi_Host *shost;
4546 struct iscsi_internal *priv;
4547
4548 if (!iscsi_is_session_dev(dev))
4549 return 0;
4550
4551 session = iscsi_dev_to_session(dev);
4552 shost = iscsi_session_to_shost(session);
4553 if (!shost->transportt)
4554 return 0;
4555
4556 priv = to_iscsi_internal(shost->transportt);
4557 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4558 return 0;
4559
4560 return &priv->session_cont.ac == cont;
4561}
4562
4563static int iscsi_conn_match(struct attribute_container *cont,
4564 struct device *dev)
4565{
4566 struct iscsi_cls_session *session;
4567 struct iscsi_cls_conn *conn;
4568 struct Scsi_Host *shost;
4569 struct iscsi_internal *priv;
4570
4571 if (!iscsi_is_conn_dev(dev))
4572 return 0;
4573
4574 conn = iscsi_dev_to_conn(dev);
4575 session = iscsi_dev_to_session(conn->dev.parent);
4576 shost = iscsi_session_to_shost(session);
4577
4578 if (!shost->transportt)
4579 return 0;
4580
4581 priv = to_iscsi_internal(shost->transportt);
4582 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4583 return 0;
4584
4585 return &priv->conn_cont.ac == cont;
4586}
4587
4588static int iscsi_host_match(struct attribute_container *cont,
4589 struct device *dev)
4590{
4591 struct Scsi_Host *shost;
4592 struct iscsi_internal *priv;
4593
4594 if (!scsi_is_host_device(dev))
4595 return 0;
4596
4597 shost = dev_to_shost(dev);
4598 if (!shost->transportt ||
4599 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4600 return 0;
4601
4602 priv = to_iscsi_internal(shost->transportt);
4603 return &priv->t.host_attrs.ac == cont;
4604}
4605
4606struct scsi_transport_template *
4607iscsi_register_transport(struct iscsi_transport *tt)
4608{
4609 struct iscsi_internal *priv;
4610 unsigned long flags;
4611 int err;
4612
4613 BUG_ON(!tt);
4614
4615 priv = iscsi_if_transport_lookup(tt);
4616 if (priv)
4617 return NULL;
4618
4619 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4620 if (!priv)
4621 return NULL;
4622 INIT_LIST_HEAD(&priv->list);
4623 priv->iscsi_transport = tt;
4624 priv->t.user_scan = iscsi_user_scan;
4625 priv->t.create_work_queue = 1;
4626
4627 priv->dev.class = &iscsi_transport_class;
4628 dev_set_name(&priv->dev, "%s", tt->name);
4629 err = device_register(&priv->dev);
4630 if (err)
4631 goto free_priv;
4632
4633 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4634 if (err)
4635 goto unregister_dev;
4636
4637
4638 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4639 priv->t.host_attrs.ac.match = iscsi_host_match;
4640 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4641 priv->t.host_size = sizeof(struct iscsi_cls_host);
4642 transport_container_register(&priv->t.host_attrs);
4643
4644
4645 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4646 priv->conn_cont.ac.match = iscsi_conn_match;
4647 priv->conn_cont.ac.grp = &iscsi_conn_group;
4648 transport_container_register(&priv->conn_cont);
4649
4650
4651 priv->session_cont.ac.class = &iscsi_session_class.class;
4652 priv->session_cont.ac.match = iscsi_session_match;
4653 priv->session_cont.ac.grp = &iscsi_session_group;
4654 transport_container_register(&priv->session_cont);
4655
4656 spin_lock_irqsave(&iscsi_transport_lock, flags);
4657 list_add(&priv->list, &iscsi_transports);
4658 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4659
4660 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4661 return &priv->t;
4662
4663unregister_dev:
4664 device_unregister(&priv->dev);
4665 return NULL;
4666free_priv:
4667 kfree(priv);
4668 return NULL;
4669}
4670EXPORT_SYMBOL_GPL(iscsi_register_transport);
4671
4672int iscsi_unregister_transport(struct iscsi_transport *tt)
4673{
4674 struct iscsi_internal *priv;
4675 unsigned long flags;
4676
4677 BUG_ON(!tt);
4678
4679 mutex_lock(&rx_queue_mutex);
4680
4681 priv = iscsi_if_transport_lookup(tt);
4682 BUG_ON (!priv);
4683
4684 spin_lock_irqsave(&iscsi_transport_lock, flags);
4685 list_del(&priv->list);
4686 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4687
4688 transport_container_unregister(&priv->conn_cont);
4689 transport_container_unregister(&priv->session_cont);
4690 transport_container_unregister(&priv->t.host_attrs);
4691
4692 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4693 device_unregister(&priv->dev);
4694 mutex_unlock(&rx_queue_mutex);
4695
4696 return 0;
4697}
4698EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4699
4700void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4701 struct device *dev, const char *fmt, ...)
4702{
4703 struct va_format vaf;
4704 va_list args;
4705
4706 va_start(args, fmt);
4707 vaf.fmt = fmt;
4708 vaf.va = &args;
4709 trace(dev, &vaf);
4710 va_end(args);
4711}
4712EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4713
4714static __init int iscsi_transport_init(void)
4715{
4716 int err;
4717 struct netlink_kernel_cfg cfg = {
4718 .groups = 1,
4719 .input = iscsi_if_rx,
4720 };
4721 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4722 ISCSI_TRANSPORT_VERSION);
4723
4724 atomic_set(&iscsi_session_nr, 0);
4725
4726 err = class_register(&iscsi_transport_class);
4727 if (err)
4728 return err;
4729
4730 err = class_register(&iscsi_endpoint_class);
4731 if (err)
4732 goto unregister_transport_class;
4733
4734 err = class_register(&iscsi_iface_class);
4735 if (err)
4736 goto unregister_endpoint_class;
4737
4738 err = transport_class_register(&iscsi_host_class);
4739 if (err)
4740 goto unregister_iface_class;
4741
4742 err = transport_class_register(&iscsi_connection_class);
4743 if (err)
4744 goto unregister_host_class;
4745
4746 err = transport_class_register(&iscsi_session_class);
4747 if (err)
4748 goto unregister_conn_class;
4749
4750 err = bus_register(&iscsi_flashnode_bus);
4751 if (err)
4752 goto unregister_session_class;
4753
4754 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4755 if (!nls) {
4756 err = -ENOBUFS;
4757 goto unregister_flashnode_bus;
4758 }
4759
4760 iscsi_eh_timer_workq = alloc_workqueue("%s",
4761 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
4762 1, "iscsi_eh");
4763 if (!iscsi_eh_timer_workq) {
4764 err = -ENOMEM;
4765 goto release_nls;
4766 }
4767
4768 iscsi_destroy_workq = alloc_workqueue("%s",
4769 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
4770 1, "iscsi_destroy");
4771 if (!iscsi_destroy_workq) {
4772 err = -ENOMEM;
4773 goto destroy_wq;
4774 }
4775
4776 return 0;
4777
4778destroy_wq:
4779 destroy_workqueue(iscsi_eh_timer_workq);
4780release_nls:
4781 netlink_kernel_release(nls);
4782unregister_flashnode_bus:
4783 bus_unregister(&iscsi_flashnode_bus);
4784unregister_session_class:
4785 transport_class_unregister(&iscsi_session_class);
4786unregister_conn_class:
4787 transport_class_unregister(&iscsi_connection_class);
4788unregister_host_class:
4789 transport_class_unregister(&iscsi_host_class);
4790unregister_iface_class:
4791 class_unregister(&iscsi_iface_class);
4792unregister_endpoint_class:
4793 class_unregister(&iscsi_endpoint_class);
4794unregister_transport_class:
4795 class_unregister(&iscsi_transport_class);
4796 return err;
4797}
4798
4799static void __exit iscsi_transport_exit(void)
4800{
4801 destroy_workqueue(iscsi_destroy_workq);
4802 destroy_workqueue(iscsi_eh_timer_workq);
4803 netlink_kernel_release(nls);
4804 bus_unregister(&iscsi_flashnode_bus);
4805 transport_class_unregister(&iscsi_connection_class);
4806 transport_class_unregister(&iscsi_session_class);
4807 transport_class_unregister(&iscsi_host_class);
4808 class_unregister(&iscsi_endpoint_class);
4809 class_unregister(&iscsi_iface_class);
4810 class_unregister(&iscsi_transport_class);
4811}
4812
4813module_init(iscsi_transport_init);
4814module_exit(iscsi_transport_exit);
4815
4816MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4817 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4818 "Alex Aizman <itn780@yahoo.com>");
4819MODULE_DESCRIPTION("iSCSI Transport Interface");
4820MODULE_LICENSE("GPL");
4821MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4822MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
4823
