This source file includes following definitions.
- iscsi_transport_release
- show_transport_handle
- iscsi_endpoint_release
- show_ep_handle
- iscsi_match_epid
- iscsi_create_endpoint
- iscsi_destroy_endpoint
- iscsi_lookup_endpoint
- iscsi_iface_release
- iscsi_iface_attr_is_visible
- iscsi_get_ipaddress_state_name
- iscsi_get_router_state_name
- iscsi_create_iface
- iscsi_destroy_iface
- iscsi_flashnode_sess_attr_is_visible
- iscsi_flashnode_sess_release
- iscsi_flashnode_conn_attr_is_visible
- iscsi_flashnode_conn_release
- iscsi_flashnode_bus_match
- iscsi_create_flashnode_sess
- iscsi_create_flashnode_conn
- iscsi_is_flashnode_conn_dev
- iscsi_destroy_flashnode_conn
- flashnode_match_index
- iscsi_get_flashnode_by_index
- iscsi_find_flashnode_sess
- iscsi_find_flashnode_conn
- iscsi_iter_destroy_flashnode_conn_fn
- iscsi_destroy_flashnode_sess
- iscsi_iter_destroy_flashnode_fn
- iscsi_destroy_all_flashnode
- iscsi_bsg_host_dispatch
- iscsi_bsg_host_add
- iscsi_setup_host
- iscsi_remove_host
- iscsi_conn_get_sid
- iscsi_session_lookup
- iscsi_conn_lookup
- iscsi_session_state_name
- iscsi_session_chkready
- iscsi_is_session_online
- iscsi_session_release
- iscsi_is_session_dev
- iscsi_iter_session_fn
- iscsi_host_for_each_session
- iscsi_scan_finished
- iscsi_user_scan_session
- iscsi_user_scan
- iscsi_scan_session
- iscsi_block_scsi_eh
- session_recovery_timedout
- __iscsi_unblock_session
- iscsi_unblock_session
- __iscsi_block_session
- iscsi_block_session
- __iscsi_unbind_session
- iscsi_alloc_session
- iscsi_add_session
- iscsi_create_session
- iscsi_conn_release
- iscsi_is_conn_dev
- iscsi_iter_destroy_conn_fn
- iscsi_remove_session
- iscsi_free_session
- iscsi_create_conn
- iscsi_destroy_conn
- iscsi_if_transport_lookup
- iscsi_multicast_skb
- iscsi_unicast_skb
- iscsi_recv_pdu
- iscsi_offload_mesg
- iscsi_conn_error_event
- iscsi_conn_login_event
- iscsi_post_host_event
- iscsi_ping_comp_event
- iscsi_if_send_reply
- iscsi_if_get_stats
- iscsi_session_event
- iscsi_if_create_session
- iscsi_if_create_conn
- iscsi_if_destroy_conn
- iscsi_set_param
- iscsi_if_ep_connect
- iscsi_if_ep_disconnect
- iscsi_if_transport_ep
- iscsi_tgt_dscvr
- iscsi_set_host_param
- iscsi_set_path
- iscsi_session_has_conns
- iscsi_set_iface_params
- iscsi_send_ping
- iscsi_get_chap
- iscsi_set_chap
- iscsi_delete_chap
- iscsi_get_discovery_parent_name
- iscsi_set_flashnode_param
- iscsi_new_flashnode
- iscsi_del_flashnode
- iscsi_login_flashnode
- iscsi_logout_flashnode
- iscsi_logout_flashnode_sid
- iscsi_get_host_stats
- iscsi_if_recv_msg
- iscsi_if_rx
- iscsi_conn_attr_is_visible
- show_priv_session_state
- show_priv_session_creator
- show_priv_session_target_id
- iscsi_session_attr_is_visible
- iscsi_host_attr_is_visible
- iscsi_get_port_speed_name
- iscsi_get_port_state_name
- iscsi_session_match
- iscsi_conn_match
- iscsi_host_match
- iscsi_register_transport
- iscsi_unregister_transport
- iscsi_dbg_trace
- iscsi_transport_init
- iscsi_transport_exit
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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
35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);
36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);
37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);
38 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);
39 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);
40
41 static int dbg_session;
42 module_param_named(debug_session, dbg_session, int,
43 S_IRUGO | S_IWUSR);
44 MODULE_PARM_DESC(debug_session,
45 "Turn on debugging for sessions in scsi_transport_iscsi "
46 "module. Set to 1 to turn on, and zero to turn off. Default "
47 "is off.");
48
49 static int dbg_conn;
50 module_param_named(debug_conn, dbg_conn, int,
51 S_IRUGO | S_IWUSR);
52 MODULE_PARM_DESC(debug_conn,
53 "Turn on debugging for connections in scsi_transport_iscsi "
54 "module. Set to 1 to turn on, and zero to turn off. Default "
55 "is off.");
56
57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
58 do { \
59 if (dbg_session) \
60 iscsi_cls_session_printk(KERN_INFO, _session, \
61 "%s: " dbg_fmt, \
62 __func__, ##arg); \
63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \
64 &(_session)->dev, \
65 "%s " dbg_fmt, __func__, ##arg); \
66 } while (0);
67
68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
69 do { \
70 if (dbg_conn) \
71 iscsi_cls_conn_printk(KERN_INFO, _conn, \
72 "%s: " dbg_fmt, \
73 __func__, ##arg); \
74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \
75 &(_conn)->dev, \
76 "%s " dbg_fmt, __func__, ##arg); \
77 } while (0);
78
79 struct iscsi_internal {
80 struct scsi_transport_template t;
81 struct iscsi_transport *iscsi_transport;
82 struct list_head list;
83 struct device dev;
84
85 struct transport_container conn_cont;
86 struct transport_container session_cont;
87 };
88
89 static atomic_t iscsi_session_nr;
90 static struct workqueue_struct *iscsi_eh_timer_workq;
91
92 static DEFINE_IDA(iscsi_sess_ida);
93
94
95
96
97
98 static LIST_HEAD(iscsi_transports);
99 static DEFINE_SPINLOCK(iscsi_transport_lock);
100
101 #define to_iscsi_internal(tmpl) \
102 container_of(tmpl, struct iscsi_internal, t)
103
104 #define dev_to_iscsi_internal(_dev) \
105 container_of(_dev, struct iscsi_internal, dev)
106
107 static void iscsi_transport_release(struct device *dev)
108 {
109 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
110 kfree(priv);
111 }
112
113
114
115
116
117 static struct class iscsi_transport_class = {
118 .name = "iscsi_transport",
119 .dev_release = iscsi_transport_release,
120 };
121
122 static ssize_t
123 show_transport_handle(struct device *dev, struct device_attribute *attr,
124 char *buf)
125 {
126 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
127 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
128 }
129 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
130
131 #define show_transport_attr(name, format) \
132 static ssize_t \
133 show_transport_##name(struct device *dev, \
134 struct device_attribute *attr,char *buf) \
135 { \
136 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
137 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
138 } \
139 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
140
141 show_transport_attr(caps, "0x%x");
142
143 static struct attribute *iscsi_transport_attrs[] = {
144 &dev_attr_handle.attr,
145 &dev_attr_caps.attr,
146 NULL,
147 };
148
149 static struct attribute_group iscsi_transport_group = {
150 .attrs = iscsi_transport_attrs,
151 };
152
153
154
155
156 #define iscsi_dev_to_endpoint(_dev) \
157 container_of(_dev, struct iscsi_endpoint, dev)
158
159 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
160 struct device_attribute dev_attr_##_prefix##_##_name = \
161 __ATTR(_name,_mode,_show,_store)
162
163 static void iscsi_endpoint_release(struct device *dev)
164 {
165 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
166 kfree(ep);
167 }
168
169 static struct class iscsi_endpoint_class = {
170 .name = "iscsi_endpoint",
171 .dev_release = iscsi_endpoint_release,
172 };
173
174 static ssize_t
175 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
176 {
177 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
178 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
179 }
180 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
181
182 static struct attribute *iscsi_endpoint_attrs[] = {
183 &dev_attr_ep_handle.attr,
184 NULL,
185 };
186
187 static struct attribute_group iscsi_endpoint_group = {
188 .attrs = iscsi_endpoint_attrs,
189 };
190
191 #define ISCSI_MAX_EPID -1
192
193 static int iscsi_match_epid(struct device *dev, const void *data)
194 {
195 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
196 const uint64_t *epid = data;
197
198 return *epid == ep->id;
199 }
200
201 struct iscsi_endpoint *
202 iscsi_create_endpoint(int dd_size)
203 {
204 struct device *dev;
205 struct iscsi_endpoint *ep;
206 uint64_t id;
207 int err;
208
209 for (id = 1; id < ISCSI_MAX_EPID; id++) {
210 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
211 iscsi_match_epid);
212 if (!dev)
213 break;
214 else
215 put_device(dev);
216 }
217 if (id == ISCSI_MAX_EPID) {
218 printk(KERN_ERR "Too many connections. Max supported %u\n",
219 ISCSI_MAX_EPID - 1);
220 return NULL;
221 }
222
223 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
224 if (!ep)
225 return NULL;
226
227 ep->id = id;
228 ep->dev.class = &iscsi_endpoint_class;
229 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
230 err = device_register(&ep->dev);
231 if (err)
232 goto free_ep;
233
234 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
235 if (err)
236 goto unregister_dev;
237
238 if (dd_size)
239 ep->dd_data = &ep[1];
240 return ep;
241
242 unregister_dev:
243 device_unregister(&ep->dev);
244 return NULL;
245
246 free_ep:
247 kfree(ep);
248 return NULL;
249 }
250 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
251
252 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
253 {
254 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
255 device_unregister(&ep->dev);
256 }
257 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
258
259 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
260 {
261 struct iscsi_endpoint *ep;
262 struct device *dev;
263
264 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
265 iscsi_match_epid);
266 if (!dev)
267 return NULL;
268
269 ep = iscsi_dev_to_endpoint(dev);
270
271
272
273
274 put_device(dev);
275 return ep;
276 }
277 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
278
279
280
281
282
283 static void iscsi_iface_release(struct device *dev)
284 {
285 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
286 struct device *parent = iface->dev.parent;
287
288 kfree(iface);
289 put_device(parent);
290 }
291
292
293 static struct class iscsi_iface_class = {
294 .name = "iscsi_iface",
295 .dev_release = iscsi_iface_release,
296 };
297
298 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
299 struct device_attribute dev_attr_##_prefix##_##_name = \
300 __ATTR(_name, _mode, _show, _store)
301
302
303 #define iscsi_iface_attr_show(type, name, param_type, param) \
304 static ssize_t \
305 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
306 char *buf) \
307 { \
308 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
309 struct iscsi_transport *t = iface->transport; \
310 return t->get_iface_param(iface, param_type, param, buf); \
311 } \
312
313 #define iscsi_iface_net_attr(type, name, param) \
314 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
315 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
316
317 #define iscsi_iface_attr(type, name, param) \
318 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
319 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
320
321
322 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
323 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
324 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
325 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
326 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
327 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
328 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
329 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
330 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
331 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
332 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
333 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
334 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
335 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
336 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
337 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
338 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
339 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
340 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
341 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
342 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
343 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
344 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
345 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
346 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
347 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
348 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
349 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
350 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
351
352
353 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
354 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
355 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
356 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
357 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
358 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
359 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
360 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
361 iscsi_iface_net_attr(ipv6_iface, link_local_state,
362 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
363 iscsi_iface_net_attr(ipv6_iface, router_state,
364 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
365 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
366 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
367 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
368 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
369 iscsi_iface_net_attr(ipv6_iface, traffic_class,
370 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
371 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
372 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
373 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
374 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
375 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
376 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
377 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
378 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
379 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
380 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
381 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
382
383
384 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
385 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
386 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
387 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
388 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
389 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
390 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
391 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
392 iscsi_iface_net_attr(iface, tcp_nagle_disable,
393 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
394 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
395 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
396 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
397 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
398 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
399 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
400
401
402 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
403 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
404 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
405 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
406 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
407 iscsi_iface_attr(iface, data_seq_in_order,
408 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
409 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
410 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
411 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
412 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
413 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
414 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
415 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
416 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
417 iscsi_iface_attr(iface, discovery_auth_optional,
418 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
419 iscsi_iface_attr(iface, discovery_logout,
420 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
421 iscsi_iface_attr(iface, strict_login_comp_en,
422 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
423 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
424
425 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
426 struct attribute *attr, int i)
427 {
428 struct device *dev = container_of(kobj, struct device, kobj);
429 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
430 struct iscsi_transport *t = iface->transport;
431 int param;
432 int param_type;
433
434 if (attr == &dev_attr_iface_enabled.attr)
435 param = ISCSI_NET_PARAM_IFACE_ENABLE;
436 else if (attr == &dev_attr_iface_vlan_id.attr)
437 param = ISCSI_NET_PARAM_VLAN_ID;
438 else if (attr == &dev_attr_iface_vlan_priority.attr)
439 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
440 else if (attr == &dev_attr_iface_vlan_enabled.attr)
441 param = ISCSI_NET_PARAM_VLAN_ENABLED;
442 else if (attr == &dev_attr_iface_mtu.attr)
443 param = ISCSI_NET_PARAM_MTU;
444 else if (attr == &dev_attr_iface_port.attr)
445 param = ISCSI_NET_PARAM_PORT;
446 else if (attr == &dev_attr_iface_ipaddress_state.attr)
447 param = ISCSI_NET_PARAM_IPADDR_STATE;
448 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
449 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
450 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
451 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
452 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
453 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
454 else if (attr == &dev_attr_iface_tcp_wsf.attr)
455 param = ISCSI_NET_PARAM_TCP_WSF;
456 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
457 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
458 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
459 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
460 else if (attr == &dev_attr_iface_cache_id.attr)
461 param = ISCSI_NET_PARAM_CACHE_ID;
462 else if (attr == &dev_attr_iface_redirect_en.attr)
463 param = ISCSI_NET_PARAM_REDIRECT_EN;
464 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
465 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
466 else if (attr == &dev_attr_iface_header_digest.attr)
467 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
468 else if (attr == &dev_attr_iface_data_digest.attr)
469 param = ISCSI_IFACE_PARAM_DATADGST_EN;
470 else if (attr == &dev_attr_iface_immediate_data.attr)
471 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
472 else if (attr == &dev_attr_iface_initial_r2t.attr)
473 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
474 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
475 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
476 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
477 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
478 else if (attr == &dev_attr_iface_erl.attr)
479 param = ISCSI_IFACE_PARAM_ERL;
480 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
481 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
482 else if (attr == &dev_attr_iface_first_burst_len.attr)
483 param = ISCSI_IFACE_PARAM_FIRST_BURST;
484 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
485 param = ISCSI_IFACE_PARAM_MAX_R2T;
486 else if (attr == &dev_attr_iface_max_burst_len.attr)
487 param = ISCSI_IFACE_PARAM_MAX_BURST;
488 else if (attr == &dev_attr_iface_chap_auth.attr)
489 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
490 else if (attr == &dev_attr_iface_bidi_chap.attr)
491 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
492 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
493 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
494 else if (attr == &dev_attr_iface_discovery_logout.attr)
495 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
496 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
497 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
498 else if (attr == &dev_attr_iface_initiator_name.attr)
499 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
500 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
501 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
502 param = ISCSI_NET_PARAM_IPV4_ADDR;
503 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
504 param = ISCSI_NET_PARAM_IPV4_GW;
505 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
506 param = ISCSI_NET_PARAM_IPV4_SUBNET;
507 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
508 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
509 else if (attr ==
510 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
511 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
512 else if (attr ==
513 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
514 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
515 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
516 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
517 else if (attr == &dev_attr_ipv4_iface_tos.attr)
518 param = ISCSI_NET_PARAM_IPV4_TOS;
519 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
520 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
521 else if (attr ==
522 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
523 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
524 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
525 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
526 else if (attr ==
527 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
528 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
529 else if (attr ==
530 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
531 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
532 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
533 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
534 else if (attr ==
535 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
536 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
537 else if (attr ==
538 &dev_attr_ipv4_iface_fragment_disable.attr)
539 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
540 else if (attr ==
541 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
542 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
543 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
544 param = ISCSI_NET_PARAM_IPV4_TTL;
545 else
546 return 0;
547 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
548 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
549 param = ISCSI_NET_PARAM_IPV6_ADDR;
550 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
551 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
552 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
553 param = ISCSI_NET_PARAM_IPV6_ROUTER;
554 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
555 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
556 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
557 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
558 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
559 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
560 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
561 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
562 else if (attr ==
563 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
564 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
565 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
566 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
567 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
568 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
569 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
570 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
571 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
572 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
573 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
574 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
575 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
576 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
577 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
578 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
579 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
580 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
581 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
582 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
583 else
584 return 0;
585 } else {
586 WARN_ONCE(1, "Invalid iface attr");
587 return 0;
588 }
589
590 switch (param) {
591 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
592 case ISCSI_IFACE_PARAM_HDRDGST_EN:
593 case ISCSI_IFACE_PARAM_DATADGST_EN:
594 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
595 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
596 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
597 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
598 case ISCSI_IFACE_PARAM_ERL:
599 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
600 case ISCSI_IFACE_PARAM_FIRST_BURST:
601 case ISCSI_IFACE_PARAM_MAX_R2T:
602 case ISCSI_IFACE_PARAM_MAX_BURST:
603 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
604 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
605 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
606 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
607 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
608 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
609 param_type = ISCSI_IFACE_PARAM;
610 break;
611 default:
612 param_type = ISCSI_NET_PARAM;
613 }
614
615 return t->attr_is_visible(param_type, param);
616 }
617
618 static struct attribute *iscsi_iface_attrs[] = {
619 &dev_attr_iface_enabled.attr,
620 &dev_attr_iface_vlan_id.attr,
621 &dev_attr_iface_vlan_priority.attr,
622 &dev_attr_iface_vlan_enabled.attr,
623 &dev_attr_ipv4_iface_ipaddress.attr,
624 &dev_attr_ipv4_iface_gateway.attr,
625 &dev_attr_ipv4_iface_subnet.attr,
626 &dev_attr_ipv4_iface_bootproto.attr,
627 &dev_attr_ipv6_iface_ipaddress.attr,
628 &dev_attr_ipv6_iface_link_local_addr.attr,
629 &dev_attr_ipv6_iface_router_addr.attr,
630 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
631 &dev_attr_ipv6_iface_link_local_autocfg.attr,
632 &dev_attr_iface_mtu.attr,
633 &dev_attr_iface_port.attr,
634 &dev_attr_iface_ipaddress_state.attr,
635 &dev_attr_iface_delayed_ack_en.attr,
636 &dev_attr_iface_tcp_nagle_disable.attr,
637 &dev_attr_iface_tcp_wsf_disable.attr,
638 &dev_attr_iface_tcp_wsf.attr,
639 &dev_attr_iface_tcp_timer_scale.attr,
640 &dev_attr_iface_tcp_timestamp_en.attr,
641 &dev_attr_iface_cache_id.attr,
642 &dev_attr_iface_redirect_en.attr,
643 &dev_attr_iface_def_taskmgmt_tmo.attr,
644 &dev_attr_iface_header_digest.attr,
645 &dev_attr_iface_data_digest.attr,
646 &dev_attr_iface_immediate_data.attr,
647 &dev_attr_iface_initial_r2t.attr,
648 &dev_attr_iface_data_seq_in_order.attr,
649 &dev_attr_iface_data_pdu_in_order.attr,
650 &dev_attr_iface_erl.attr,
651 &dev_attr_iface_max_recv_dlength.attr,
652 &dev_attr_iface_first_burst_len.attr,
653 &dev_attr_iface_max_outstanding_r2t.attr,
654 &dev_attr_iface_max_burst_len.attr,
655 &dev_attr_iface_chap_auth.attr,
656 &dev_attr_iface_bidi_chap.attr,
657 &dev_attr_iface_discovery_auth_optional.attr,
658 &dev_attr_iface_discovery_logout.attr,
659 &dev_attr_iface_strict_login_comp_en.attr,
660 &dev_attr_iface_initiator_name.attr,
661 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
662 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
663 &dev_attr_ipv4_iface_tos_en.attr,
664 &dev_attr_ipv4_iface_tos.attr,
665 &dev_attr_ipv4_iface_grat_arp_en.attr,
666 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
667 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
668 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
669 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
670 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
671 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
672 &dev_attr_ipv4_iface_fragment_disable.attr,
673 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
674 &dev_attr_ipv4_iface_ttl.attr,
675 &dev_attr_ipv6_iface_link_local_state.attr,
676 &dev_attr_ipv6_iface_router_state.attr,
677 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
678 &dev_attr_ipv6_iface_mld_en.attr,
679 &dev_attr_ipv6_iface_flow_label.attr,
680 &dev_attr_ipv6_iface_traffic_class.attr,
681 &dev_attr_ipv6_iface_hop_limit.attr,
682 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
683 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
684 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
685 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
686 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
687 NULL,
688 };
689
690 static struct attribute_group iscsi_iface_group = {
691 .attrs = iscsi_iface_attrs,
692 .is_visible = iscsi_iface_attr_is_visible,
693 };
694
695
696 static const struct {
697 enum iscsi_ipaddress_state value;
698 char *name;
699 } iscsi_ipaddress_state_names[] = {
700 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
701 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
702 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
703 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
704 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
705 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
706 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
707 };
708
709 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
710 {
711 int i;
712 char *state = NULL;
713
714 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
715 if (iscsi_ipaddress_state_names[i].value == port_state) {
716 state = iscsi_ipaddress_state_names[i].name;
717 break;
718 }
719 }
720 return state;
721 }
722 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
723
724
725 static const struct {
726 enum iscsi_router_state value;
727 char *name;
728 } iscsi_router_state_names[] = {
729 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
730 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
731 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
732 {ISCSI_ROUTER_STATE_STALE, "Stale" },
733 };
734
735 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
736 {
737 int i;
738 char *state = NULL;
739
740 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
741 if (iscsi_router_state_names[i].value == router_state) {
742 state = iscsi_router_state_names[i].name;
743 break;
744 }
745 }
746 return state;
747 }
748 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
749
750 struct iscsi_iface *
751 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
752 uint32_t iface_type, uint32_t iface_num, int dd_size)
753 {
754 struct iscsi_iface *iface;
755 int err;
756
757 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
758 if (!iface)
759 return NULL;
760
761 iface->transport = transport;
762 iface->iface_type = iface_type;
763 iface->iface_num = iface_num;
764 iface->dev.release = iscsi_iface_release;
765 iface->dev.class = &iscsi_iface_class;
766
767 iface->dev.parent = get_device(&shost->shost_gendev);
768 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
769 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
770 iface_num);
771 else
772 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
773 iface_num);
774
775 err = device_register(&iface->dev);
776 if (err)
777 goto free_iface;
778
779 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
780 if (err)
781 goto unreg_iface;
782
783 if (dd_size)
784 iface->dd_data = &iface[1];
785 return iface;
786
787 unreg_iface:
788 device_unregister(&iface->dev);
789 return NULL;
790
791 free_iface:
792 put_device(iface->dev.parent);
793 kfree(iface);
794 return NULL;
795 }
796 EXPORT_SYMBOL_GPL(iscsi_create_iface);
797
798 void iscsi_destroy_iface(struct iscsi_iface *iface)
799 {
800 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
801 device_unregister(&iface->dev);
802 }
803 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
804
805
806
807
808
809 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
810 struct device_attribute dev_attr_##_prefix##_##_name = \
811 __ATTR(_name, _mode, _show, _store)
812
813
814 #define iscsi_flashnode_sess_attr_show(type, name, param) \
815 static ssize_t \
816 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
817 char *buf) \
818 { \
819 struct iscsi_bus_flash_session *fnode_sess = \
820 iscsi_dev_to_flash_session(dev);\
821 struct iscsi_transport *t = fnode_sess->transport; \
822 return t->get_flashnode_param(fnode_sess, param, buf); \
823 } \
824
825
826 #define iscsi_flashnode_sess_attr(type, name, param) \
827 iscsi_flashnode_sess_attr_show(type, name, param) \
828 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
829 show_##type##_##name, NULL);
830
831
832
833 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
834 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
835 iscsi_flashnode_sess_attr(fnode, discovery_session,
836 ISCSI_FLASHNODE_DISCOVERY_SESS);
837 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
838 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
839 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
840 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
841 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
842 ISCSI_FLASHNODE_DATASEQ_INORDER);
843 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
844 ISCSI_FLASHNODE_PDU_INORDER);
845 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
846 iscsi_flashnode_sess_attr(fnode, discovery_logout,
847 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
848 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
849 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
850 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
851 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
852 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
853 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
854 iscsi_flashnode_sess_attr(fnode, def_time2retain,
855 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
856 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
857 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
858 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
859 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
860 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
861 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
862 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
863 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
864 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
865 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
866 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
867 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
868 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
869 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
870 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
871 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
872 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
873 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
874 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
875 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
876
877 static struct attribute *iscsi_flashnode_sess_attrs[] = {
878 &dev_attr_fnode_auto_snd_tgt_disable.attr,
879 &dev_attr_fnode_discovery_session.attr,
880 &dev_attr_fnode_portal_type.attr,
881 &dev_attr_fnode_entry_enable.attr,
882 &dev_attr_fnode_immediate_data.attr,
883 &dev_attr_fnode_initial_r2t.attr,
884 &dev_attr_fnode_data_seq_in_order.attr,
885 &dev_attr_fnode_data_pdu_in_order.attr,
886 &dev_attr_fnode_chap_auth.attr,
887 &dev_attr_fnode_discovery_logout.attr,
888 &dev_attr_fnode_bidi_chap.attr,
889 &dev_attr_fnode_discovery_auth_optional.attr,
890 &dev_attr_fnode_erl.attr,
891 &dev_attr_fnode_first_burst_len.attr,
892 &dev_attr_fnode_def_time2wait.attr,
893 &dev_attr_fnode_def_time2retain.attr,
894 &dev_attr_fnode_max_outstanding_r2t.attr,
895 &dev_attr_fnode_isid.attr,
896 &dev_attr_fnode_tsid.attr,
897 &dev_attr_fnode_max_burst_len.attr,
898 &dev_attr_fnode_def_taskmgmt_tmo.attr,
899 &dev_attr_fnode_targetalias.attr,
900 &dev_attr_fnode_targetname.attr,
901 &dev_attr_fnode_tpgt.attr,
902 &dev_attr_fnode_discovery_parent_idx.attr,
903 &dev_attr_fnode_discovery_parent_type.attr,
904 &dev_attr_fnode_chap_in_idx.attr,
905 &dev_attr_fnode_chap_out_idx.attr,
906 &dev_attr_fnode_username.attr,
907 &dev_attr_fnode_username_in.attr,
908 &dev_attr_fnode_password.attr,
909 &dev_attr_fnode_password_in.attr,
910 &dev_attr_fnode_is_boot_target.attr,
911 NULL,
912 };
913
914 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
915 struct attribute *attr,
916 int i)
917 {
918 struct device *dev = container_of(kobj, struct device, kobj);
919 struct iscsi_bus_flash_session *fnode_sess =
920 iscsi_dev_to_flash_session(dev);
921 struct iscsi_transport *t = fnode_sess->transport;
922 int param;
923
924 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
925 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
926 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
927 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
928 } else if (attr == &dev_attr_fnode_portal_type.attr) {
929 param = ISCSI_FLASHNODE_PORTAL_TYPE;
930 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
931 param = ISCSI_FLASHNODE_ENTRY_EN;
932 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
933 param = ISCSI_FLASHNODE_IMM_DATA_EN;
934 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
935 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
936 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
937 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
938 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
939 param = ISCSI_FLASHNODE_PDU_INORDER;
940 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
941 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
942 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
943 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
944 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
945 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
946 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
947 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
948 } else if (attr == &dev_attr_fnode_erl.attr) {
949 param = ISCSI_FLASHNODE_ERL;
950 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
951 param = ISCSI_FLASHNODE_FIRST_BURST;
952 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
953 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
954 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
955 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
956 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
957 param = ISCSI_FLASHNODE_MAX_R2T;
958 } else if (attr == &dev_attr_fnode_isid.attr) {
959 param = ISCSI_FLASHNODE_ISID;
960 } else if (attr == &dev_attr_fnode_tsid.attr) {
961 param = ISCSI_FLASHNODE_TSID;
962 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
963 param = ISCSI_FLASHNODE_MAX_BURST;
964 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
965 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
966 } else if (attr == &dev_attr_fnode_targetalias.attr) {
967 param = ISCSI_FLASHNODE_ALIAS;
968 } else if (attr == &dev_attr_fnode_targetname.attr) {
969 param = ISCSI_FLASHNODE_NAME;
970 } else if (attr == &dev_attr_fnode_tpgt.attr) {
971 param = ISCSI_FLASHNODE_TPGT;
972 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
973 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
974 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
975 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
976 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
977 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
978 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
979 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
980 } else if (attr == &dev_attr_fnode_username.attr) {
981 param = ISCSI_FLASHNODE_USERNAME;
982 } else if (attr == &dev_attr_fnode_username_in.attr) {
983 param = ISCSI_FLASHNODE_USERNAME_IN;
984 } else if (attr == &dev_attr_fnode_password.attr) {
985 param = ISCSI_FLASHNODE_PASSWORD;
986 } else if (attr == &dev_attr_fnode_password_in.attr) {
987 param = ISCSI_FLASHNODE_PASSWORD_IN;
988 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
989 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
990 } else {
991 WARN_ONCE(1, "Invalid flashnode session attr");
992 return 0;
993 }
994
995 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
996 }
997
998 static struct attribute_group iscsi_flashnode_sess_attr_group = {
999 .attrs = iscsi_flashnode_sess_attrs,
1000 .is_visible = iscsi_flashnode_sess_attr_is_visible,
1001 };
1002
1003 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
1004 &iscsi_flashnode_sess_attr_group,
1005 NULL,
1006 };
1007
1008 static void iscsi_flashnode_sess_release(struct device *dev)
1009 {
1010 struct iscsi_bus_flash_session *fnode_sess =
1011 iscsi_dev_to_flash_session(dev);
1012
1013 kfree(fnode_sess->targetname);
1014 kfree(fnode_sess->targetalias);
1015 kfree(fnode_sess->portal_type);
1016 kfree(fnode_sess);
1017 }
1018
1019 static const struct device_type iscsi_flashnode_sess_dev_type = {
1020 .name = "iscsi_flashnode_sess_dev_type",
1021 .groups = iscsi_flashnode_sess_attr_groups,
1022 .release = iscsi_flashnode_sess_release,
1023 };
1024
1025
1026 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1027 static ssize_t \
1028 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1029 char *buf) \
1030 { \
1031 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1032 struct iscsi_bus_flash_session *fnode_sess = \
1033 iscsi_flash_conn_to_flash_session(fnode_conn);\
1034 struct iscsi_transport *t = fnode_conn->transport; \
1035 return t->get_flashnode_param(fnode_sess, param, buf); \
1036 } \
1037
1038
1039 #define iscsi_flashnode_conn_attr(type, name, param) \
1040 iscsi_flashnode_conn_attr_show(type, name, param) \
1041 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1042 show_##type##_##name, NULL);
1043
1044
1045
1046 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1047 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1048 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1049 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1050 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1051 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1052 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1053 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1054 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1055 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1056 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1057 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1058 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1059 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1060 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1061 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1062 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1063 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1064 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1065 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1066 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1067 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1068 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1069 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1070 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1071 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1072 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1073 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1074 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1075 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1076 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1077 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1078 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1079 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1080 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1081 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1082 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1083 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1084 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1085
1086 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1087 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1088 &dev_attr_fnode_header_digest.attr,
1089 &dev_attr_fnode_data_digest.attr,
1090 &dev_attr_fnode_snack_req.attr,
1091 &dev_attr_fnode_tcp_timestamp_stat.attr,
1092 &dev_attr_fnode_tcp_nagle_disable.attr,
1093 &dev_attr_fnode_tcp_wsf_disable.attr,
1094 &dev_attr_fnode_tcp_timer_scale.attr,
1095 &dev_attr_fnode_tcp_timestamp_enable.attr,
1096 &dev_attr_fnode_fragment_disable.attr,
1097 &dev_attr_fnode_max_recv_dlength.attr,
1098 &dev_attr_fnode_max_xmit_dlength.attr,
1099 &dev_attr_fnode_keepalive_tmo.attr,
1100 &dev_attr_fnode_port.attr,
1101 &dev_attr_fnode_ipaddress.attr,
1102 &dev_attr_fnode_redirect_ipaddr.attr,
1103 &dev_attr_fnode_max_segment_size.attr,
1104 &dev_attr_fnode_local_port.attr,
1105 &dev_attr_fnode_ipv4_tos.attr,
1106 &dev_attr_fnode_ipv6_traffic_class.attr,
1107 &dev_attr_fnode_ipv6_flow_label.attr,
1108 &dev_attr_fnode_link_local_ipv6.attr,
1109 &dev_attr_fnode_tcp_xmit_wsf.attr,
1110 &dev_attr_fnode_tcp_recv_wsf.attr,
1111 &dev_attr_fnode_statsn.attr,
1112 &dev_attr_fnode_exp_statsn.attr,
1113 NULL,
1114 };
1115
1116 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1117 struct attribute *attr,
1118 int i)
1119 {
1120 struct device *dev = container_of(kobj, struct device, kobj);
1121 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1122 struct iscsi_transport *t = fnode_conn->transport;
1123 int param;
1124
1125 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1126 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1127 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1128 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1129 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1130 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1131 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1132 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1133 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1134 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1135 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1136 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1137 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1138 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1139 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1140 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1141 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1142 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1143 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1144 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1145 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1146 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1147 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1148 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1149 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1150 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1151 } else if (attr == &dev_attr_fnode_port.attr) {
1152 param = ISCSI_FLASHNODE_PORT;
1153 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1154 param = ISCSI_FLASHNODE_IPADDR;
1155 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1156 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1157 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1158 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1159 } else if (attr == &dev_attr_fnode_local_port.attr) {
1160 param = ISCSI_FLASHNODE_LOCAL_PORT;
1161 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1162 param = ISCSI_FLASHNODE_IPV4_TOS;
1163 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1164 param = ISCSI_FLASHNODE_IPV6_TC;
1165 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1166 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1167 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1168 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1169 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1170 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1171 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1172 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1173 } else if (attr == &dev_attr_fnode_statsn.attr) {
1174 param = ISCSI_FLASHNODE_STATSN;
1175 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1176 param = ISCSI_FLASHNODE_EXP_STATSN;
1177 } else {
1178 WARN_ONCE(1, "Invalid flashnode connection attr");
1179 return 0;
1180 }
1181
1182 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1183 }
1184
1185 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1186 .attrs = iscsi_flashnode_conn_attrs,
1187 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1188 };
1189
1190 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1191 &iscsi_flashnode_conn_attr_group,
1192 NULL,
1193 };
1194
1195 static void iscsi_flashnode_conn_release(struct device *dev)
1196 {
1197 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1198
1199 kfree(fnode_conn->ipaddress);
1200 kfree(fnode_conn->redirect_ipaddr);
1201 kfree(fnode_conn->link_local_ipv6_addr);
1202 kfree(fnode_conn);
1203 }
1204
1205 static const struct device_type iscsi_flashnode_conn_dev_type = {
1206 .name = "iscsi_flashnode_conn_dev_type",
1207 .groups = iscsi_flashnode_conn_attr_groups,
1208 .release = iscsi_flashnode_conn_release,
1209 };
1210
1211 static struct bus_type iscsi_flashnode_bus;
1212
1213 int iscsi_flashnode_bus_match(struct device *dev,
1214 struct device_driver *drv)
1215 {
1216 if (dev->bus == &iscsi_flashnode_bus)
1217 return 1;
1218 return 0;
1219 }
1220 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1221
1222 static struct bus_type iscsi_flashnode_bus = {
1223 .name = "iscsi_flashnode",
1224 .match = &iscsi_flashnode_bus_match,
1225 };
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240 struct iscsi_bus_flash_session *
1241 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1242 struct iscsi_transport *transport,
1243 int dd_size)
1244 {
1245 struct iscsi_bus_flash_session *fnode_sess;
1246 int err;
1247
1248 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1249 if (!fnode_sess)
1250 return NULL;
1251
1252 fnode_sess->transport = transport;
1253 fnode_sess->target_id = index;
1254 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1255 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1256 fnode_sess->dev.parent = &shost->shost_gendev;
1257 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1258 shost->host_no, index);
1259
1260 err = device_register(&fnode_sess->dev);
1261 if (err)
1262 goto free_fnode_sess;
1263
1264 if (dd_size)
1265 fnode_sess->dd_data = &fnode_sess[1];
1266
1267 return fnode_sess;
1268
1269 free_fnode_sess:
1270 kfree(fnode_sess);
1271 return NULL;
1272 }
1273 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288 struct iscsi_bus_flash_conn *
1289 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1290 struct iscsi_bus_flash_session *fnode_sess,
1291 struct iscsi_transport *transport,
1292 int dd_size)
1293 {
1294 struct iscsi_bus_flash_conn *fnode_conn;
1295 int err;
1296
1297 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1298 if (!fnode_conn)
1299 return NULL;
1300
1301 fnode_conn->transport = transport;
1302 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1303 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1304 fnode_conn->dev.parent = &fnode_sess->dev;
1305 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1306 shost->host_no, fnode_sess->target_id);
1307
1308 err = device_register(&fnode_conn->dev);
1309 if (err)
1310 goto free_fnode_conn;
1311
1312 if (dd_size)
1313 fnode_conn->dd_data = &fnode_conn[1];
1314
1315 return fnode_conn;
1316
1317 free_fnode_conn:
1318 kfree(fnode_conn);
1319 return NULL;
1320 }
1321 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1335 {
1336 return dev->bus == &iscsi_flashnode_bus;
1337 }
1338
1339 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1340 {
1341 device_unregister(&fnode_conn->dev);
1342 return 0;
1343 }
1344
1345 static int flashnode_match_index(struct device *dev, void *data)
1346 {
1347 struct iscsi_bus_flash_session *fnode_sess = NULL;
1348 int ret = 0;
1349
1350 if (!iscsi_flashnode_bus_match(dev, NULL))
1351 goto exit_match_index;
1352
1353 fnode_sess = iscsi_dev_to_flash_session(dev);
1354 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1355
1356 exit_match_index:
1357 return ret;
1358 }
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371 static struct iscsi_bus_flash_session *
1372 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1373 {
1374 struct iscsi_bus_flash_session *fnode_sess = NULL;
1375 struct device *dev;
1376
1377 dev = device_find_child(&shost->shost_gendev, &idx,
1378 flashnode_match_index);
1379 if (dev)
1380 fnode_sess = iscsi_dev_to_flash_session(dev);
1381
1382 return fnode_sess;
1383 }
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398 struct device *
1399 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1400 int (*fn)(struct device *dev, void *data))
1401 {
1402 return device_find_child(&shost->shost_gendev, data, fn);
1403 }
1404 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417 struct device *
1418 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1419 {
1420 return device_find_child(&fnode_sess->dev, NULL,
1421 iscsi_is_flashnode_conn_dev);
1422 }
1423 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1424
1425 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1426 {
1427 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1428 return 0;
1429
1430 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1431 }
1432
1433
1434
1435
1436
1437
1438
1439
1440 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1441 {
1442 int err;
1443
1444 err = device_for_each_child(&fnode_sess->dev, NULL,
1445 iscsi_iter_destroy_flashnode_conn_fn);
1446 if (err)
1447 pr_err("Could not delete all connections for %s. Error %d.\n",
1448 fnode_sess->dev.kobj.name, err);
1449
1450 device_unregister(&fnode_sess->dev);
1451 }
1452 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1453
1454 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1455 {
1456 if (!iscsi_flashnode_bus_match(dev, NULL))
1457 return 0;
1458
1459 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1460 return 0;
1461 }
1462
1463
1464
1465
1466
1467
1468
1469
1470 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1471 {
1472 device_for_each_child(&shost->shost_gendev, NULL,
1473 iscsi_iter_destroy_flashnode_fn);
1474 }
1475 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1476
1477
1478
1479
1480
1481
1482
1483
1484 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1485 {
1486 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1487 struct iscsi_bsg_request *req = job->request;
1488 struct iscsi_bsg_reply *reply = job->reply;
1489 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1490 int cmdlen = sizeof(uint32_t);
1491 int ret;
1492
1493
1494 if (job->request_len < sizeof(uint32_t)) {
1495 ret = -ENOMSG;
1496 goto fail_host_msg;
1497 }
1498
1499
1500 switch (req->msgcode) {
1501 case ISCSI_BSG_HST_VENDOR:
1502 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1503 if ((shost->hostt->vendor_id == 0L) ||
1504 (req->rqst_data.h_vendor.vendor_id !=
1505 shost->hostt->vendor_id)) {
1506 ret = -ESRCH;
1507 goto fail_host_msg;
1508 }
1509 break;
1510 default:
1511 ret = -EBADR;
1512 goto fail_host_msg;
1513 }
1514
1515
1516 if (job->request_len < cmdlen) {
1517 ret = -ENOMSG;
1518 goto fail_host_msg;
1519 }
1520
1521 ret = i->iscsi_transport->bsg_request(job);
1522 if (!ret)
1523 return 0;
1524
1525 fail_host_msg:
1526
1527 BUG_ON(job->reply_len < sizeof(uint32_t));
1528 reply->reply_payload_rcv_len = 0;
1529 reply->result = ret;
1530 job->reply_len = sizeof(uint32_t);
1531 bsg_job_done(job, ret, 0);
1532 return 0;
1533 }
1534
1535
1536
1537
1538
1539
1540 static int
1541 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1542 {
1543 struct device *dev = &shost->shost_gendev;
1544 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1545 struct request_queue *q;
1546 char bsg_name[20];
1547
1548 if (!i->iscsi_transport->bsg_request)
1549 return -ENOTSUPP;
1550
1551 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1552 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);
1553 if (IS_ERR(q)) {
1554 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1555 "initialize - no request queue\n");
1556 return PTR_ERR(q);
1557 }
1558 __scsi_init_queue(shost, q);
1559
1560 ihost->bsg_q = q;
1561 return 0;
1562 }
1563
1564 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1565 struct device *cdev)
1566 {
1567 struct Scsi_Host *shost = dev_to_shost(dev);
1568 struct iscsi_cls_host *ihost = shost->shost_data;
1569
1570 memset(ihost, 0, sizeof(*ihost));
1571 atomic_set(&ihost->nr_scans, 0);
1572 mutex_init(&ihost->mutex);
1573
1574 iscsi_bsg_host_add(shost, ihost);
1575
1576
1577 return 0;
1578 }
1579
1580 static int iscsi_remove_host(struct transport_container *tc,
1581 struct device *dev, struct device *cdev)
1582 {
1583 struct Scsi_Host *shost = dev_to_shost(dev);
1584 struct iscsi_cls_host *ihost = shost->shost_data;
1585
1586 bsg_remove_queue(ihost->bsg_q);
1587 return 0;
1588 }
1589
1590 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1591 "iscsi_host",
1592 iscsi_setup_host,
1593 iscsi_remove_host,
1594 NULL);
1595
1596 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1597 "iscsi_session",
1598 NULL,
1599 NULL,
1600 NULL);
1601
1602 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1603 "iscsi_connection",
1604 NULL,
1605 NULL,
1606 NULL);
1607
1608 static struct sock *nls;
1609 static DEFINE_MUTEX(rx_queue_mutex);
1610
1611 static LIST_HEAD(sesslist);
1612 static DEFINE_SPINLOCK(sesslock);
1613 static LIST_HEAD(connlist);
1614 static DEFINE_SPINLOCK(connlock);
1615
1616 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1617 {
1618 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1619 return sess->sid;
1620 }
1621
1622
1623
1624
1625 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1626 {
1627 unsigned long flags;
1628 struct iscsi_cls_session *sess;
1629
1630 spin_lock_irqsave(&sesslock, flags);
1631 list_for_each_entry(sess, &sesslist, sess_list) {
1632 if (sess->sid == sid) {
1633 spin_unlock_irqrestore(&sesslock, flags);
1634 return sess;
1635 }
1636 }
1637 spin_unlock_irqrestore(&sesslock, flags);
1638 return NULL;
1639 }
1640
1641
1642
1643
1644 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1645 {
1646 unsigned long flags;
1647 struct iscsi_cls_conn *conn;
1648
1649 spin_lock_irqsave(&connlock, flags);
1650 list_for_each_entry(conn, &connlist, conn_list) {
1651 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1652 spin_unlock_irqrestore(&connlock, flags);
1653 return conn;
1654 }
1655 }
1656 spin_unlock_irqrestore(&connlock, flags);
1657 return NULL;
1658 }
1659
1660
1661
1662
1663
1664 static struct {
1665 int value;
1666 char *name;
1667 } iscsi_session_state_names[] = {
1668 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1669 { ISCSI_SESSION_FAILED, "FAILED" },
1670 { ISCSI_SESSION_FREE, "FREE" },
1671 };
1672
1673 static const char *iscsi_session_state_name(int state)
1674 {
1675 int i;
1676 char *name = NULL;
1677
1678 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1679 if (iscsi_session_state_names[i].value == state) {
1680 name = iscsi_session_state_names[i].name;
1681 break;
1682 }
1683 }
1684 return name;
1685 }
1686
1687 int iscsi_session_chkready(struct iscsi_cls_session *session)
1688 {
1689 unsigned long flags;
1690 int err;
1691
1692 spin_lock_irqsave(&session->lock, flags);
1693 switch (session->state) {
1694 case ISCSI_SESSION_LOGGED_IN:
1695 err = 0;
1696 break;
1697 case ISCSI_SESSION_FAILED:
1698 err = DID_IMM_RETRY << 16;
1699 break;
1700 case ISCSI_SESSION_FREE:
1701 err = DID_TRANSPORT_FAILFAST << 16;
1702 break;
1703 default:
1704 err = DID_NO_CONNECT << 16;
1705 break;
1706 }
1707 spin_unlock_irqrestore(&session->lock, flags);
1708 return err;
1709 }
1710 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1711
1712 int iscsi_is_session_online(struct iscsi_cls_session *session)
1713 {
1714 unsigned long flags;
1715 int ret = 0;
1716
1717 spin_lock_irqsave(&session->lock, flags);
1718 if (session->state == ISCSI_SESSION_LOGGED_IN)
1719 ret = 1;
1720 spin_unlock_irqrestore(&session->lock, flags);
1721 return ret;
1722 }
1723 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1724
1725 static void iscsi_session_release(struct device *dev)
1726 {
1727 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1728 struct Scsi_Host *shost;
1729
1730 shost = iscsi_session_to_shost(session);
1731 scsi_host_put(shost);
1732 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1733 kfree(session);
1734 }
1735
1736 int iscsi_is_session_dev(const struct device *dev)
1737 {
1738 return dev->release == iscsi_session_release;
1739 }
1740 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1741
1742 static int iscsi_iter_session_fn(struct device *dev, void *data)
1743 {
1744 void (* fn) (struct iscsi_cls_session *) = data;
1745
1746 if (!iscsi_is_session_dev(dev))
1747 return 0;
1748 fn(iscsi_dev_to_session(dev));
1749 return 0;
1750 }
1751
1752 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1753 void (*fn)(struct iscsi_cls_session *))
1754 {
1755 device_for_each_child(&shost->shost_gendev, fn,
1756 iscsi_iter_session_fn);
1757 }
1758 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1769 {
1770 struct iscsi_cls_host *ihost = shost->shost_data;
1771
1772
1773
1774
1775 return !atomic_read(&ihost->nr_scans);
1776 }
1777 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1778
1779 struct iscsi_scan_data {
1780 unsigned int channel;
1781 unsigned int id;
1782 u64 lun;
1783 enum scsi_scan_mode rescan;
1784 };
1785
1786 static int iscsi_user_scan_session(struct device *dev, void *data)
1787 {
1788 struct iscsi_scan_data *scan_data = data;
1789 struct iscsi_cls_session *session;
1790 struct Scsi_Host *shost;
1791 struct iscsi_cls_host *ihost;
1792 unsigned long flags;
1793 unsigned int id;
1794
1795 if (!iscsi_is_session_dev(dev))
1796 return 0;
1797
1798 session = iscsi_dev_to_session(dev);
1799
1800 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1801
1802 shost = iscsi_session_to_shost(session);
1803 ihost = shost->shost_data;
1804
1805 mutex_lock(&ihost->mutex);
1806 spin_lock_irqsave(&session->lock, flags);
1807 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1808 spin_unlock_irqrestore(&session->lock, flags);
1809 goto user_scan_exit;
1810 }
1811 id = session->target_id;
1812 spin_unlock_irqrestore(&session->lock, flags);
1813
1814 if (id != ISCSI_MAX_TARGET) {
1815 if ((scan_data->channel == SCAN_WILD_CARD ||
1816 scan_data->channel == 0) &&
1817 (scan_data->id == SCAN_WILD_CARD ||
1818 scan_data->id == id))
1819 scsi_scan_target(&session->dev, 0, id,
1820 scan_data->lun, scan_data->rescan);
1821 }
1822
1823 user_scan_exit:
1824 mutex_unlock(&ihost->mutex);
1825 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1826 return 0;
1827 }
1828
1829 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1830 uint id, u64 lun)
1831 {
1832 struct iscsi_scan_data scan_data;
1833
1834 scan_data.channel = channel;
1835 scan_data.id = id;
1836 scan_data.lun = lun;
1837 scan_data.rescan = SCSI_SCAN_MANUAL;
1838
1839 return device_for_each_child(&shost->shost_gendev, &scan_data,
1840 iscsi_user_scan_session);
1841 }
1842
1843 static void iscsi_scan_session(struct work_struct *work)
1844 {
1845 struct iscsi_cls_session *session =
1846 container_of(work, struct iscsi_cls_session, scan_work);
1847 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1848 struct iscsi_cls_host *ihost = shost->shost_data;
1849 struct iscsi_scan_data scan_data;
1850
1851 scan_data.channel = 0;
1852 scan_data.id = SCAN_WILD_CARD;
1853 scan_data.lun = SCAN_WILD_CARD;
1854 scan_data.rescan = SCSI_SCAN_RESCAN;
1855
1856 iscsi_user_scan_session(&session->dev, &scan_data);
1857 atomic_dec(&ihost->nr_scans);
1858 }
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1870 {
1871 struct iscsi_cls_session *session =
1872 starget_to_session(scsi_target(cmd->device));
1873 unsigned long flags;
1874 int ret = 0;
1875
1876 spin_lock_irqsave(&session->lock, flags);
1877 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1878 if (session->state == ISCSI_SESSION_FREE) {
1879 ret = FAST_IO_FAIL;
1880 break;
1881 }
1882 spin_unlock_irqrestore(&session->lock, flags);
1883 msleep(1000);
1884 spin_lock_irqsave(&session->lock, flags);
1885 }
1886 spin_unlock_irqrestore(&session->lock, flags);
1887 return ret;
1888 }
1889 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1890
1891 static void session_recovery_timedout(struct work_struct *work)
1892 {
1893 struct iscsi_cls_session *session =
1894 container_of(work, struct iscsi_cls_session,
1895 recovery_work.work);
1896 unsigned long flags;
1897
1898 iscsi_cls_session_printk(KERN_INFO, session,
1899 "session recovery timed out after %d secs\n",
1900 session->recovery_tmo);
1901
1902 spin_lock_irqsave(&session->lock, flags);
1903 switch (session->state) {
1904 case ISCSI_SESSION_FAILED:
1905 session->state = ISCSI_SESSION_FREE;
1906 break;
1907 case ISCSI_SESSION_LOGGED_IN:
1908 case ISCSI_SESSION_FREE:
1909
1910 spin_unlock_irqrestore(&session->lock, flags);
1911 return;
1912 }
1913 spin_unlock_irqrestore(&session->lock, flags);
1914
1915 if (session->transport->session_recovery_timedout)
1916 session->transport->session_recovery_timedout(session);
1917
1918 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1919 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1920 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1921 }
1922
1923 static void __iscsi_unblock_session(struct work_struct *work)
1924 {
1925 struct iscsi_cls_session *session =
1926 container_of(work, struct iscsi_cls_session,
1927 unblock_work);
1928 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1929 struct iscsi_cls_host *ihost = shost->shost_data;
1930 unsigned long flags;
1931
1932 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1933
1934
1935
1936
1937 cancel_delayed_work(&session->recovery_work);
1938 spin_lock_irqsave(&session->lock, flags);
1939 session->state = ISCSI_SESSION_LOGGED_IN;
1940 spin_unlock_irqrestore(&session->lock, flags);
1941
1942 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1943
1944
1945
1946
1947
1948 if (shost->hostt->scan_finished) {
1949 if (scsi_queue_work(shost, &session->scan_work))
1950 atomic_inc(&ihost->nr_scans);
1951 }
1952 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1953 }
1954
1955
1956
1957
1958
1959
1960
1961 void iscsi_unblock_session(struct iscsi_cls_session *session)
1962 {
1963 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1964
1965
1966
1967
1968 flush_workqueue(iscsi_eh_timer_workq);
1969 }
1970 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1971
1972 static void __iscsi_block_session(struct work_struct *work)
1973 {
1974 struct iscsi_cls_session *session =
1975 container_of(work, struct iscsi_cls_session,
1976 block_work);
1977 unsigned long flags;
1978
1979 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1980 spin_lock_irqsave(&session->lock, flags);
1981 session->state = ISCSI_SESSION_FAILED;
1982 spin_unlock_irqrestore(&session->lock, flags);
1983 scsi_target_block(&session->dev);
1984 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1985 if (session->recovery_tmo >= 0)
1986 queue_delayed_work(iscsi_eh_timer_workq,
1987 &session->recovery_work,
1988 session->recovery_tmo * HZ);
1989 }
1990
1991 void iscsi_block_session(struct iscsi_cls_session *session)
1992 {
1993 queue_work(iscsi_eh_timer_workq, &session->block_work);
1994 }
1995 EXPORT_SYMBOL_GPL(iscsi_block_session);
1996
1997 static void __iscsi_unbind_session(struct work_struct *work)
1998 {
1999 struct iscsi_cls_session *session =
2000 container_of(work, struct iscsi_cls_session,
2001 unbind_work);
2002 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2003 struct iscsi_cls_host *ihost = shost->shost_data;
2004 unsigned long flags;
2005 unsigned int target_id;
2006
2007 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2008
2009
2010 mutex_lock(&ihost->mutex);
2011 spin_lock_irqsave(&session->lock, flags);
2012 if (session->target_id == ISCSI_MAX_TARGET) {
2013 spin_unlock_irqrestore(&session->lock, flags);
2014 mutex_unlock(&ihost->mutex);
2015 goto unbind_session_exit;
2016 }
2017
2018 target_id = session->target_id;
2019 session->target_id = ISCSI_MAX_TARGET;
2020 spin_unlock_irqrestore(&session->lock, flags);
2021 mutex_unlock(&ihost->mutex);
2022
2023 if (session->ida_used)
2024 ida_simple_remove(&iscsi_sess_ida, target_id);
2025
2026 scsi_remove_target(&session->dev);
2027
2028 unbind_session_exit:
2029 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2030 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2031 }
2032
2033 struct iscsi_cls_session *
2034 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2035 int dd_size)
2036 {
2037 struct iscsi_cls_session *session;
2038
2039 session = kzalloc(sizeof(*session) + dd_size,
2040 GFP_KERNEL);
2041 if (!session)
2042 return NULL;
2043
2044 session->transport = transport;
2045 session->creator = -1;
2046 session->recovery_tmo = 120;
2047 session->recovery_tmo_sysfs_override = false;
2048 session->state = ISCSI_SESSION_FREE;
2049 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2050 INIT_LIST_HEAD(&session->sess_list);
2051 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2052 INIT_WORK(&session->block_work, __iscsi_block_session);
2053 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2054 INIT_WORK(&session->scan_work, iscsi_scan_session);
2055 spin_lock_init(&session->lock);
2056
2057
2058 scsi_host_get(shost);
2059 session->dev.parent = &shost->shost_gendev;
2060 session->dev.release = iscsi_session_release;
2061 device_initialize(&session->dev);
2062 if (dd_size)
2063 session->dd_data = &session[1];
2064
2065 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2066 return session;
2067 }
2068 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2069
2070 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2071 {
2072 unsigned long flags;
2073 int id = 0;
2074 int err;
2075
2076 session->sid = atomic_add_return(1, &iscsi_session_nr);
2077
2078 if (target_id == ISCSI_MAX_TARGET) {
2079 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2080
2081 if (id < 0) {
2082 iscsi_cls_session_printk(KERN_ERR, session,
2083 "Failure in Target ID Allocation\n");
2084 return id;
2085 }
2086 session->target_id = (unsigned int)id;
2087 session->ida_used = true;
2088 } else
2089 session->target_id = target_id;
2090
2091 dev_set_name(&session->dev, "session%u", session->sid);
2092 err = device_add(&session->dev);
2093 if (err) {
2094 iscsi_cls_session_printk(KERN_ERR, session,
2095 "could not register session's dev\n");
2096 goto release_ida;
2097 }
2098 transport_register_device(&session->dev);
2099
2100 spin_lock_irqsave(&sesslock, flags);
2101 list_add(&session->sess_list, &sesslist);
2102 spin_unlock_irqrestore(&sesslock, flags);
2103
2104 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2105 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2106 return 0;
2107
2108 release_ida:
2109 if (session->ida_used)
2110 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2111
2112 return err;
2113 }
2114 EXPORT_SYMBOL_GPL(iscsi_add_session);
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125 struct iscsi_cls_session *
2126 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2127 int dd_size, unsigned int target_id)
2128 {
2129 struct iscsi_cls_session *session;
2130
2131 session = iscsi_alloc_session(shost, transport, dd_size);
2132 if (!session)
2133 return NULL;
2134
2135 if (iscsi_add_session(session, target_id)) {
2136 iscsi_free_session(session);
2137 return NULL;
2138 }
2139 return session;
2140 }
2141 EXPORT_SYMBOL_GPL(iscsi_create_session);
2142
2143 static void iscsi_conn_release(struct device *dev)
2144 {
2145 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2146 struct device *parent = conn->dev.parent;
2147
2148 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2149 kfree(conn);
2150 put_device(parent);
2151 }
2152
2153 static int iscsi_is_conn_dev(const struct device *dev)
2154 {
2155 return dev->release == iscsi_conn_release;
2156 }
2157
2158 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2159 {
2160 if (!iscsi_is_conn_dev(dev))
2161 return 0;
2162 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2163 }
2164
2165 void iscsi_remove_session(struct iscsi_cls_session *session)
2166 {
2167 unsigned long flags;
2168 int err;
2169
2170 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2171
2172 spin_lock_irqsave(&sesslock, flags);
2173 list_del(&session->sess_list);
2174 spin_unlock_irqrestore(&sesslock, flags);
2175
2176
2177 flush_workqueue(iscsi_eh_timer_workq);
2178
2179 if (!cancel_delayed_work(&session->recovery_work))
2180 flush_workqueue(iscsi_eh_timer_workq);
2181
2182
2183
2184
2185
2186
2187 spin_lock_irqsave(&session->lock, flags);
2188 session->state = ISCSI_SESSION_FREE;
2189 spin_unlock_irqrestore(&session->lock, flags);
2190
2191 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2192
2193 flush_work(&session->scan_work);
2194
2195 flush_work(&session->unbind_work);
2196 __iscsi_unbind_session(&session->unbind_work);
2197
2198
2199 err = device_for_each_child(&session->dev, NULL,
2200 iscsi_iter_destroy_conn_fn);
2201 if (err)
2202 iscsi_cls_session_printk(KERN_ERR, session,
2203 "Could not delete all connections "
2204 "for session. Error %d.\n", err);
2205
2206 transport_unregister_device(&session->dev);
2207
2208 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2209 device_del(&session->dev);
2210 }
2211 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2212
2213 void iscsi_free_session(struct iscsi_cls_session *session)
2214 {
2215 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2216 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2217 put_device(&session->dev);
2218 }
2219 EXPORT_SYMBOL_GPL(iscsi_free_session);
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236 struct iscsi_cls_conn *
2237 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2238 {
2239 struct iscsi_transport *transport = session->transport;
2240 struct iscsi_cls_conn *conn;
2241 unsigned long flags;
2242 int err;
2243
2244 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2245 if (!conn)
2246 return NULL;
2247 if (dd_size)
2248 conn->dd_data = &conn[1];
2249
2250 mutex_init(&conn->ep_mutex);
2251 INIT_LIST_HEAD(&conn->conn_list);
2252 conn->transport = transport;
2253 conn->cid = cid;
2254
2255
2256 if (!get_device(&session->dev))
2257 goto free_conn;
2258
2259 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2260 conn->dev.parent = &session->dev;
2261 conn->dev.release = iscsi_conn_release;
2262 err = device_register(&conn->dev);
2263 if (err) {
2264 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2265 "register connection's dev\n");
2266 goto release_parent_ref;
2267 }
2268 transport_register_device(&conn->dev);
2269
2270 spin_lock_irqsave(&connlock, flags);
2271 list_add(&conn->conn_list, &connlist);
2272 spin_unlock_irqrestore(&connlock, flags);
2273
2274 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2275 return conn;
2276
2277 release_parent_ref:
2278 put_device(&session->dev);
2279 free_conn:
2280 kfree(conn);
2281 return NULL;
2282 }
2283
2284 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2285
2286
2287
2288
2289
2290
2291
2292 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2293 {
2294 unsigned long flags;
2295
2296 spin_lock_irqsave(&connlock, flags);
2297 list_del(&conn->conn_list);
2298 spin_unlock_irqrestore(&connlock, flags);
2299
2300 transport_unregister_device(&conn->dev);
2301 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2302 device_unregister(&conn->dev);
2303 return 0;
2304 }
2305 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2306
2307
2308
2309
2310 static struct iscsi_internal *
2311 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2312 {
2313 struct iscsi_internal *priv;
2314 unsigned long flags;
2315
2316 spin_lock_irqsave(&iscsi_transport_lock, flags);
2317 list_for_each_entry(priv, &iscsi_transports, list) {
2318 if (tt == priv->iscsi_transport) {
2319 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2320 return priv;
2321 }
2322 }
2323 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2324 return NULL;
2325 }
2326
2327 static int
2328 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2329 {
2330 return nlmsg_multicast(nls, skb, 0, group, gfp);
2331 }
2332
2333 static int
2334 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2335 {
2336 return nlmsg_unicast(nls, skb, portid);
2337 }
2338
2339 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2340 char *data, uint32_t data_size)
2341 {
2342 struct nlmsghdr *nlh;
2343 struct sk_buff *skb;
2344 struct iscsi_uevent *ev;
2345 char *pdu;
2346 struct iscsi_internal *priv;
2347 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2348 data_size);
2349
2350 priv = iscsi_if_transport_lookup(conn->transport);
2351 if (!priv)
2352 return -EINVAL;
2353
2354 skb = alloc_skb(len, GFP_ATOMIC);
2355 if (!skb) {
2356 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2357 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2358 "control PDU: OOM\n");
2359 return -ENOMEM;
2360 }
2361
2362 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2363 ev = nlmsg_data(nlh);
2364 memset(ev, 0, sizeof(*ev));
2365 ev->transport_handle = iscsi_handle(conn->transport);
2366 ev->type = ISCSI_KEVENT_RECV_PDU;
2367 ev->r.recv_req.cid = conn->cid;
2368 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2369 pdu = (char*)ev + sizeof(*ev);
2370 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2371 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2372
2373 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2374 }
2375 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2376
2377 int iscsi_offload_mesg(struct Scsi_Host *shost,
2378 struct iscsi_transport *transport, uint32_t type,
2379 char *data, uint16_t data_size)
2380 {
2381 struct nlmsghdr *nlh;
2382 struct sk_buff *skb;
2383 struct iscsi_uevent *ev;
2384 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2385
2386 skb = alloc_skb(len, GFP_ATOMIC);
2387 if (!skb) {
2388 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2389 return -ENOMEM;
2390 }
2391
2392 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2393 ev = nlmsg_data(nlh);
2394 memset(ev, 0, sizeof(*ev));
2395 ev->type = type;
2396 ev->transport_handle = iscsi_handle(transport);
2397 switch (type) {
2398 case ISCSI_KEVENT_PATH_REQ:
2399 ev->r.req_path.host_no = shost->host_no;
2400 break;
2401 case ISCSI_KEVENT_IF_DOWN:
2402 ev->r.notify_if_down.host_no = shost->host_no;
2403 break;
2404 }
2405
2406 memcpy((char *)ev + sizeof(*ev), data, data_size);
2407
2408 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2409 }
2410 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2411
2412 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2413 {
2414 struct nlmsghdr *nlh;
2415 struct sk_buff *skb;
2416 struct iscsi_uevent *ev;
2417 struct iscsi_internal *priv;
2418 int len = nlmsg_total_size(sizeof(*ev));
2419
2420 priv = iscsi_if_transport_lookup(conn->transport);
2421 if (!priv)
2422 return;
2423
2424 skb = alloc_skb(len, GFP_ATOMIC);
2425 if (!skb) {
2426 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2427 "conn error (%d)\n", error);
2428 return;
2429 }
2430
2431 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2432 ev = nlmsg_data(nlh);
2433 ev->transport_handle = iscsi_handle(conn->transport);
2434 ev->type = ISCSI_KEVENT_CONN_ERROR;
2435 ev->r.connerror.error = error;
2436 ev->r.connerror.cid = conn->cid;
2437 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2438
2439 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2440
2441 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2442 error);
2443 }
2444 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2445
2446 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2447 enum iscsi_conn_state state)
2448 {
2449 struct nlmsghdr *nlh;
2450 struct sk_buff *skb;
2451 struct iscsi_uevent *ev;
2452 struct iscsi_internal *priv;
2453 int len = nlmsg_total_size(sizeof(*ev));
2454
2455 priv = iscsi_if_transport_lookup(conn->transport);
2456 if (!priv)
2457 return;
2458
2459 skb = alloc_skb(len, GFP_ATOMIC);
2460 if (!skb) {
2461 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2462 "conn login (%d)\n", state);
2463 return;
2464 }
2465
2466 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2467 ev = nlmsg_data(nlh);
2468 ev->transport_handle = iscsi_handle(conn->transport);
2469 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2470 ev->r.conn_login.state = state;
2471 ev->r.conn_login.cid = conn->cid;
2472 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2473 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2474
2475 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2476 state);
2477 }
2478 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2479
2480 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2481 enum iscsi_host_event_code code, uint32_t data_size,
2482 uint8_t *data)
2483 {
2484 struct nlmsghdr *nlh;
2485 struct sk_buff *skb;
2486 struct iscsi_uevent *ev;
2487 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2488
2489 skb = alloc_skb(len, GFP_NOIO);
2490 if (!skb) {
2491 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2492 host_no, code);
2493 return;
2494 }
2495
2496 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2497 ev = nlmsg_data(nlh);
2498 ev->transport_handle = iscsi_handle(transport);
2499 ev->type = ISCSI_KEVENT_HOST_EVENT;
2500 ev->r.host_event.host_no = host_no;
2501 ev->r.host_event.code = code;
2502 ev->r.host_event.data_size = data_size;
2503
2504 if (data_size)
2505 memcpy((char *)ev + sizeof(*ev), data, data_size);
2506
2507 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2508 }
2509 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2510
2511 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2512 uint32_t status, uint32_t pid, uint32_t data_size,
2513 uint8_t *data)
2514 {
2515 struct nlmsghdr *nlh;
2516 struct sk_buff *skb;
2517 struct iscsi_uevent *ev;
2518 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2519
2520 skb = alloc_skb(len, GFP_NOIO);
2521 if (!skb) {
2522 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2523 return;
2524 }
2525
2526 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2527 ev = nlmsg_data(nlh);
2528 ev->transport_handle = iscsi_handle(transport);
2529 ev->type = ISCSI_KEVENT_PING_COMP;
2530 ev->r.ping_comp.host_no = host_no;
2531 ev->r.ping_comp.status = status;
2532 ev->r.ping_comp.pid = pid;
2533 ev->r.ping_comp.data_size = data_size;
2534 memcpy((char *)ev + sizeof(*ev), data, data_size);
2535
2536 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2537 }
2538 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2539
2540 static int
2541 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2542 {
2543 struct sk_buff *skb;
2544 struct nlmsghdr *nlh;
2545 int len = nlmsg_total_size(size);
2546
2547 skb = alloc_skb(len, GFP_ATOMIC);
2548 if (!skb) {
2549 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2550 return -ENOMEM;
2551 }
2552
2553 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2554 memcpy(nlmsg_data(nlh), payload, size);
2555 return iscsi_unicast_skb(skb, portid);
2556 }
2557
2558 static int
2559 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2560 {
2561 struct iscsi_uevent *ev = nlmsg_data(nlh);
2562 struct iscsi_stats *stats;
2563 struct sk_buff *skbstat;
2564 struct iscsi_cls_conn *conn;
2565 struct nlmsghdr *nlhstat;
2566 struct iscsi_uevent *evstat;
2567 struct iscsi_internal *priv;
2568 int len = nlmsg_total_size(sizeof(*ev) +
2569 sizeof(struct iscsi_stats) +
2570 sizeof(struct iscsi_stats_custom) *
2571 ISCSI_STATS_CUSTOM_MAX);
2572 int err = 0;
2573
2574 priv = iscsi_if_transport_lookup(transport);
2575 if (!priv)
2576 return -EINVAL;
2577
2578 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2579 if (!conn)
2580 return -EEXIST;
2581
2582 do {
2583 int actual_size;
2584
2585 skbstat = alloc_skb(len, GFP_ATOMIC);
2586 if (!skbstat) {
2587 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2588 "deliver stats: OOM\n");
2589 return -ENOMEM;
2590 }
2591
2592 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2593 (len - sizeof(*nlhstat)), 0);
2594 evstat = nlmsg_data(nlhstat);
2595 memset(evstat, 0, sizeof(*evstat));
2596 evstat->transport_handle = iscsi_handle(conn->transport);
2597 evstat->type = nlh->nlmsg_type;
2598 evstat->u.get_stats.cid =
2599 ev->u.get_stats.cid;
2600 evstat->u.get_stats.sid =
2601 ev->u.get_stats.sid;
2602 stats = (struct iscsi_stats *)
2603 ((char*)evstat + sizeof(*evstat));
2604 memset(stats, 0, sizeof(*stats));
2605
2606 transport->get_stats(conn, stats);
2607 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2608 sizeof(struct iscsi_stats) +
2609 sizeof(struct iscsi_stats_custom) *
2610 stats->custom_length);
2611 actual_size -= sizeof(*nlhstat);
2612 actual_size = nlmsg_msg_size(actual_size);
2613 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2614 nlhstat->nlmsg_len = actual_size;
2615
2616 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2617 GFP_ATOMIC);
2618 } while (err < 0 && err != -ECONNREFUSED);
2619
2620 return err;
2621 }
2622
2623
2624
2625
2626
2627
2628 int iscsi_session_event(struct iscsi_cls_session *session,
2629 enum iscsi_uevent_e event)
2630 {
2631 struct iscsi_internal *priv;
2632 struct Scsi_Host *shost;
2633 struct iscsi_uevent *ev;
2634 struct sk_buff *skb;
2635 struct nlmsghdr *nlh;
2636 int rc, len = nlmsg_total_size(sizeof(*ev));
2637
2638 priv = iscsi_if_transport_lookup(session->transport);
2639 if (!priv)
2640 return -EINVAL;
2641 shost = iscsi_session_to_shost(session);
2642
2643 skb = alloc_skb(len, GFP_KERNEL);
2644 if (!skb) {
2645 iscsi_cls_session_printk(KERN_ERR, session,
2646 "Cannot notify userspace of session "
2647 "event %u\n", event);
2648 return -ENOMEM;
2649 }
2650
2651 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2652 ev = nlmsg_data(nlh);
2653 ev->transport_handle = iscsi_handle(session->transport);
2654
2655 ev->type = event;
2656 switch (event) {
2657 case ISCSI_KEVENT_DESTROY_SESSION:
2658 ev->r.d_session.host_no = shost->host_no;
2659 ev->r.d_session.sid = session->sid;
2660 break;
2661 case ISCSI_KEVENT_CREATE_SESSION:
2662 ev->r.c_session_ret.host_no = shost->host_no;
2663 ev->r.c_session_ret.sid = session->sid;
2664 break;
2665 case ISCSI_KEVENT_UNBIND_SESSION:
2666 ev->r.unbind_session.host_no = shost->host_no;
2667 ev->r.unbind_session.sid = session->sid;
2668 break;
2669 default:
2670 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2671 "%u.\n", event);
2672 kfree_skb(skb);
2673 return -EINVAL;
2674 }
2675
2676
2677
2678
2679
2680 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2681 if (rc == -ESRCH)
2682 iscsi_cls_session_printk(KERN_ERR, session,
2683 "Cannot notify userspace of session "
2684 "event %u. Check iscsi daemon\n",
2685 event);
2686
2687 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2688 event, rc);
2689 return rc;
2690 }
2691 EXPORT_SYMBOL_GPL(iscsi_session_event);
2692
2693 static int
2694 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2695 struct iscsi_uevent *ev, pid_t pid,
2696 uint32_t initial_cmdsn, uint16_t cmds_max,
2697 uint16_t queue_depth)
2698 {
2699 struct iscsi_transport *transport = priv->iscsi_transport;
2700 struct iscsi_cls_session *session;
2701 struct Scsi_Host *shost;
2702
2703 session = transport->create_session(ep, cmds_max, queue_depth,
2704 initial_cmdsn);
2705 if (!session)
2706 return -ENOMEM;
2707
2708 session->creator = pid;
2709 shost = iscsi_session_to_shost(session);
2710 ev->r.c_session_ret.host_no = shost->host_no;
2711 ev->r.c_session_ret.sid = session->sid;
2712 ISCSI_DBG_TRANS_SESSION(session,
2713 "Completed creating transport session\n");
2714 return 0;
2715 }
2716
2717 static int
2718 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2719 {
2720 struct iscsi_cls_conn *conn;
2721 struct iscsi_cls_session *session;
2722
2723 session = iscsi_session_lookup(ev->u.c_conn.sid);
2724 if (!session) {
2725 printk(KERN_ERR "iscsi: invalid session %d.\n",
2726 ev->u.c_conn.sid);
2727 return -EINVAL;
2728 }
2729
2730 conn = transport->create_conn(session, ev->u.c_conn.cid);
2731 if (!conn) {
2732 iscsi_cls_session_printk(KERN_ERR, session,
2733 "couldn't create a new connection.");
2734 return -ENOMEM;
2735 }
2736
2737 ev->r.c_conn_ret.sid = session->sid;
2738 ev->r.c_conn_ret.cid = conn->cid;
2739
2740 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2741 return 0;
2742 }
2743
2744 static int
2745 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2746 {
2747 struct iscsi_cls_conn *conn;
2748
2749 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2750 if (!conn)
2751 return -EINVAL;
2752
2753 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2754 if (transport->destroy_conn)
2755 transport->destroy_conn(conn);
2756
2757 return 0;
2758 }
2759
2760 static int
2761 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2762 {
2763 char *data = (char*)ev + sizeof(*ev);
2764 struct iscsi_cls_conn *conn;
2765 struct iscsi_cls_session *session;
2766 int err = 0, value = 0;
2767
2768 session = iscsi_session_lookup(ev->u.set_param.sid);
2769 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2770 if (!conn || !session)
2771 return -EINVAL;
2772
2773 switch (ev->u.set_param.param) {
2774 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2775 sscanf(data, "%d", &value);
2776 if (!session->recovery_tmo_sysfs_override)
2777 session->recovery_tmo = value;
2778 break;
2779 default:
2780 err = transport->set_param(conn, ev->u.set_param.param,
2781 data, ev->u.set_param.len);
2782 }
2783
2784 return err;
2785 }
2786
2787 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2788 struct iscsi_uevent *ev, int msg_type)
2789 {
2790 struct iscsi_endpoint *ep;
2791 struct sockaddr *dst_addr;
2792 struct Scsi_Host *shost = NULL;
2793 int non_blocking, err = 0;
2794
2795 if (!transport->ep_connect)
2796 return -EINVAL;
2797
2798 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2799 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2800 if (!shost) {
2801 printk(KERN_ERR "ep connect failed. Could not find "
2802 "host no %u\n",
2803 ev->u.ep_connect_through_host.host_no);
2804 return -ENODEV;
2805 }
2806 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2807 } else
2808 non_blocking = ev->u.ep_connect.non_blocking;
2809
2810 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2811 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2812 if (IS_ERR(ep)) {
2813 err = PTR_ERR(ep);
2814 goto release_host;
2815 }
2816
2817 ev->r.ep_connect_ret.handle = ep->id;
2818 release_host:
2819 if (shost)
2820 scsi_host_put(shost);
2821 return err;
2822 }
2823
2824 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2825 u64 ep_handle)
2826 {
2827 struct iscsi_cls_conn *conn;
2828 struct iscsi_endpoint *ep;
2829
2830 if (!transport->ep_disconnect)
2831 return -EINVAL;
2832
2833 ep = iscsi_lookup_endpoint(ep_handle);
2834 if (!ep)
2835 return -EINVAL;
2836 conn = ep->conn;
2837 if (conn) {
2838 mutex_lock(&conn->ep_mutex);
2839 conn->ep = NULL;
2840 mutex_unlock(&conn->ep_mutex);
2841 }
2842
2843 transport->ep_disconnect(ep);
2844 return 0;
2845 }
2846
2847 static int
2848 iscsi_if_transport_ep(struct iscsi_transport *transport,
2849 struct iscsi_uevent *ev, int msg_type)
2850 {
2851 struct iscsi_endpoint *ep;
2852 int rc = 0;
2853
2854 switch (msg_type) {
2855 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2856 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2857 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2858 break;
2859 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2860 if (!transport->ep_poll)
2861 return -EINVAL;
2862
2863 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2864 if (!ep)
2865 return -EINVAL;
2866
2867 ev->r.retcode = transport->ep_poll(ep,
2868 ev->u.ep_poll.timeout_ms);
2869 break;
2870 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2871 rc = iscsi_if_ep_disconnect(transport,
2872 ev->u.ep_disconnect.ep_handle);
2873 break;
2874 }
2875 return rc;
2876 }
2877
2878 static int
2879 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2880 struct iscsi_uevent *ev)
2881 {
2882 struct Scsi_Host *shost;
2883 struct sockaddr *dst_addr;
2884 int err;
2885
2886 if (!transport->tgt_dscvr)
2887 return -EINVAL;
2888
2889 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2890 if (!shost) {
2891 printk(KERN_ERR "target discovery could not find host no %u\n",
2892 ev->u.tgt_dscvr.host_no);
2893 return -ENODEV;
2894 }
2895
2896
2897 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2898 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2899 ev->u.tgt_dscvr.enable, dst_addr);
2900 scsi_host_put(shost);
2901 return err;
2902 }
2903
2904 static int
2905 iscsi_set_host_param(struct iscsi_transport *transport,
2906 struct iscsi_uevent *ev)
2907 {
2908 char *data = (char*)ev + sizeof(*ev);
2909 struct Scsi_Host *shost;
2910 int err;
2911
2912 if (!transport->set_host_param)
2913 return -ENOSYS;
2914
2915 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2916 if (!shost) {
2917 printk(KERN_ERR "set_host_param could not find host no %u\n",
2918 ev->u.set_host_param.host_no);
2919 return -ENODEV;
2920 }
2921
2922 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2923 data, ev->u.set_host_param.len);
2924 scsi_host_put(shost);
2925 return err;
2926 }
2927
2928 static int
2929 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2930 {
2931 struct Scsi_Host *shost;
2932 struct iscsi_path *params;
2933 int err;
2934
2935 if (!transport->set_path)
2936 return -ENOSYS;
2937
2938 shost = scsi_host_lookup(ev->u.set_path.host_no);
2939 if (!shost) {
2940 printk(KERN_ERR "set path could not find host no %u\n",
2941 ev->u.set_path.host_no);
2942 return -ENODEV;
2943 }
2944
2945 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2946 err = transport->set_path(shost, params);
2947
2948 scsi_host_put(shost);
2949 return err;
2950 }
2951
2952 static int iscsi_session_has_conns(int sid)
2953 {
2954 struct iscsi_cls_conn *conn;
2955 unsigned long flags;
2956 int found = 0;
2957
2958 spin_lock_irqsave(&connlock, flags);
2959 list_for_each_entry(conn, &connlist, conn_list) {
2960 if (iscsi_conn_get_sid(conn) == sid) {
2961 found = 1;
2962 break;
2963 }
2964 }
2965 spin_unlock_irqrestore(&connlock, flags);
2966
2967 return found;
2968 }
2969
2970 static int
2971 iscsi_set_iface_params(struct iscsi_transport *transport,
2972 struct iscsi_uevent *ev, uint32_t len)
2973 {
2974 char *data = (char *)ev + sizeof(*ev);
2975 struct Scsi_Host *shost;
2976 int err;
2977
2978 if (!transport->set_iface_param)
2979 return -ENOSYS;
2980
2981 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2982 if (!shost) {
2983 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2984 ev->u.set_iface_params.host_no);
2985 return -ENODEV;
2986 }
2987
2988 err = transport->set_iface_param(shost, data, len);
2989 scsi_host_put(shost);
2990 return err;
2991 }
2992
2993 static int
2994 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2995 {
2996 struct Scsi_Host *shost;
2997 struct sockaddr *dst_addr;
2998 int err;
2999
3000 if (!transport->send_ping)
3001 return -ENOSYS;
3002
3003 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3004 if (!shost) {
3005 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3006 ev->u.iscsi_ping.host_no);
3007 return -ENODEV;
3008 }
3009
3010 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3011 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3012 ev->u.iscsi_ping.iface_type,
3013 ev->u.iscsi_ping.payload_size,
3014 ev->u.iscsi_ping.pid,
3015 dst_addr);
3016 scsi_host_put(shost);
3017 return err;
3018 }
3019
3020 static int
3021 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3022 {
3023 struct iscsi_uevent *ev = nlmsg_data(nlh);
3024 struct Scsi_Host *shost = NULL;
3025 struct iscsi_chap_rec *chap_rec;
3026 struct iscsi_internal *priv;
3027 struct sk_buff *skbchap;
3028 struct nlmsghdr *nlhchap;
3029 struct iscsi_uevent *evchap;
3030 uint32_t chap_buf_size;
3031 int len, err = 0;
3032 char *buf;
3033
3034 if (!transport->get_chap)
3035 return -EINVAL;
3036
3037 priv = iscsi_if_transport_lookup(transport);
3038 if (!priv)
3039 return -EINVAL;
3040
3041 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3042 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3043
3044 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3045 if (!shost) {
3046 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3047 __func__, ev->u.get_chap.host_no);
3048 return -ENODEV;
3049 }
3050
3051 do {
3052 int actual_size;
3053
3054 skbchap = alloc_skb(len, GFP_KERNEL);
3055 if (!skbchap) {
3056 printk(KERN_ERR "can not deliver chap: OOM\n");
3057 err = -ENOMEM;
3058 goto exit_get_chap;
3059 }
3060
3061 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3062 (len - sizeof(*nlhchap)), 0);
3063 evchap = nlmsg_data(nlhchap);
3064 memset(evchap, 0, sizeof(*evchap));
3065 evchap->transport_handle = iscsi_handle(transport);
3066 evchap->type = nlh->nlmsg_type;
3067 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3068 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3069 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3070 buf = (char *)evchap + sizeof(*evchap);
3071 memset(buf, 0, chap_buf_size);
3072
3073 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3074 &evchap->u.get_chap.num_entries, buf);
3075
3076 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3077 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3078 nlhchap->nlmsg_len = actual_size;
3079
3080 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3081 GFP_KERNEL);
3082 } while (err < 0 && err != -ECONNREFUSED);
3083
3084 exit_get_chap:
3085 scsi_host_put(shost);
3086 return err;
3087 }
3088
3089 static int iscsi_set_chap(struct iscsi_transport *transport,
3090 struct iscsi_uevent *ev, uint32_t len)
3091 {
3092 char *data = (char *)ev + sizeof(*ev);
3093 struct Scsi_Host *shost;
3094 int err = 0;
3095
3096 if (!transport->set_chap)
3097 return -ENOSYS;
3098
3099 shost = scsi_host_lookup(ev->u.set_path.host_no);
3100 if (!shost) {
3101 pr_err("%s could not find host no %u\n",
3102 __func__, ev->u.set_path.host_no);
3103 return -ENODEV;
3104 }
3105
3106 err = transport->set_chap(shost, data, len);
3107 scsi_host_put(shost);
3108 return err;
3109 }
3110
3111 static int iscsi_delete_chap(struct iscsi_transport *transport,
3112 struct iscsi_uevent *ev)
3113 {
3114 struct Scsi_Host *shost;
3115 int err = 0;
3116
3117 if (!transport->delete_chap)
3118 return -ENOSYS;
3119
3120 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3121 if (!shost) {
3122 printk(KERN_ERR "%s could not find host no %u\n",
3123 __func__, ev->u.delete_chap.host_no);
3124 return -ENODEV;
3125 }
3126
3127 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3128 scsi_host_put(shost);
3129 return err;
3130 }
3131
3132 static const struct {
3133 enum iscsi_discovery_parent_type value;
3134 char *name;
3135 } iscsi_discovery_parent_names[] = {
3136 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3137 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3138 {ISCSI_DISC_PARENT_ISNS, "isns" },
3139 };
3140
3141 char *iscsi_get_discovery_parent_name(int parent_type)
3142 {
3143 int i;
3144 char *state = "Unknown!";
3145
3146 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3147 if (iscsi_discovery_parent_names[i].value & parent_type) {
3148 state = iscsi_discovery_parent_names[i].name;
3149 break;
3150 }
3151 }
3152 return state;
3153 }
3154 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3155
3156 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3157 struct iscsi_uevent *ev, uint32_t len)
3158 {
3159 char *data = (char *)ev + sizeof(*ev);
3160 struct Scsi_Host *shost;
3161 struct iscsi_bus_flash_session *fnode_sess;
3162 struct iscsi_bus_flash_conn *fnode_conn;
3163 struct device *dev;
3164 uint32_t idx;
3165 int err = 0;
3166
3167 if (!transport->set_flashnode_param) {
3168 err = -ENOSYS;
3169 goto exit_set_fnode;
3170 }
3171
3172 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3173 if (!shost) {
3174 pr_err("%s could not find host no %u\n",
3175 __func__, ev->u.set_flashnode.host_no);
3176 err = -ENODEV;
3177 goto put_host;
3178 }
3179
3180 idx = ev->u.set_flashnode.flashnode_idx;
3181 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3182 if (!fnode_sess) {
3183 pr_err("%s could not find flashnode %u for host no %u\n",
3184 __func__, idx, ev->u.set_flashnode.host_no);
3185 err = -ENODEV;
3186 goto put_host;
3187 }
3188
3189 dev = iscsi_find_flashnode_conn(fnode_sess);
3190 if (!dev) {
3191 err = -ENODEV;
3192 goto put_sess;
3193 }
3194
3195 fnode_conn = iscsi_dev_to_flash_conn(dev);
3196 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3197 put_device(dev);
3198
3199 put_sess:
3200 put_device(&fnode_sess->dev);
3201
3202 put_host:
3203 scsi_host_put(shost);
3204
3205 exit_set_fnode:
3206 return err;
3207 }
3208
3209 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3210 struct iscsi_uevent *ev, uint32_t len)
3211 {
3212 char *data = (char *)ev + sizeof(*ev);
3213 struct Scsi_Host *shost;
3214 int index;
3215 int err = 0;
3216
3217 if (!transport->new_flashnode) {
3218 err = -ENOSYS;
3219 goto exit_new_fnode;
3220 }
3221
3222 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3223 if (!shost) {
3224 pr_err("%s could not find host no %u\n",
3225 __func__, ev->u.new_flashnode.host_no);
3226 err = -ENODEV;
3227 goto put_host;
3228 }
3229
3230 index = transport->new_flashnode(shost, data, len);
3231
3232 if (index >= 0)
3233 ev->r.new_flashnode_ret.flashnode_idx = index;
3234 else
3235 err = -EIO;
3236
3237 put_host:
3238 scsi_host_put(shost);
3239
3240 exit_new_fnode:
3241 return err;
3242 }
3243
3244 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3245 struct iscsi_uevent *ev)
3246 {
3247 struct Scsi_Host *shost;
3248 struct iscsi_bus_flash_session *fnode_sess;
3249 uint32_t idx;
3250 int err = 0;
3251
3252 if (!transport->del_flashnode) {
3253 err = -ENOSYS;
3254 goto exit_del_fnode;
3255 }
3256
3257 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3258 if (!shost) {
3259 pr_err("%s could not find host no %u\n",
3260 __func__, ev->u.del_flashnode.host_no);
3261 err = -ENODEV;
3262 goto put_host;
3263 }
3264
3265 idx = ev->u.del_flashnode.flashnode_idx;
3266 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3267 if (!fnode_sess) {
3268 pr_err("%s could not find flashnode %u for host no %u\n",
3269 __func__, idx, ev->u.del_flashnode.host_no);
3270 err = -ENODEV;
3271 goto put_host;
3272 }
3273
3274 err = transport->del_flashnode(fnode_sess);
3275 put_device(&fnode_sess->dev);
3276
3277 put_host:
3278 scsi_host_put(shost);
3279
3280 exit_del_fnode:
3281 return err;
3282 }
3283
3284 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3285 struct iscsi_uevent *ev)
3286 {
3287 struct Scsi_Host *shost;
3288 struct iscsi_bus_flash_session *fnode_sess;
3289 struct iscsi_bus_flash_conn *fnode_conn;
3290 struct device *dev;
3291 uint32_t idx;
3292 int err = 0;
3293
3294 if (!transport->login_flashnode) {
3295 err = -ENOSYS;
3296 goto exit_login_fnode;
3297 }
3298
3299 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3300 if (!shost) {
3301 pr_err("%s could not find host no %u\n",
3302 __func__, ev->u.login_flashnode.host_no);
3303 err = -ENODEV;
3304 goto put_host;
3305 }
3306
3307 idx = ev->u.login_flashnode.flashnode_idx;
3308 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3309 if (!fnode_sess) {
3310 pr_err("%s could not find flashnode %u for host no %u\n",
3311 __func__, idx, ev->u.login_flashnode.host_no);
3312 err = -ENODEV;
3313 goto put_host;
3314 }
3315
3316 dev = iscsi_find_flashnode_conn(fnode_sess);
3317 if (!dev) {
3318 err = -ENODEV;
3319 goto put_sess;
3320 }
3321
3322 fnode_conn = iscsi_dev_to_flash_conn(dev);
3323 err = transport->login_flashnode(fnode_sess, fnode_conn);
3324 put_device(dev);
3325
3326 put_sess:
3327 put_device(&fnode_sess->dev);
3328
3329 put_host:
3330 scsi_host_put(shost);
3331
3332 exit_login_fnode:
3333 return err;
3334 }
3335
3336 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3337 struct iscsi_uevent *ev)
3338 {
3339 struct Scsi_Host *shost;
3340 struct iscsi_bus_flash_session *fnode_sess;
3341 struct iscsi_bus_flash_conn *fnode_conn;
3342 struct device *dev;
3343 uint32_t idx;
3344 int err = 0;
3345
3346 if (!transport->logout_flashnode) {
3347 err = -ENOSYS;
3348 goto exit_logout_fnode;
3349 }
3350
3351 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3352 if (!shost) {
3353 pr_err("%s could not find host no %u\n",
3354 __func__, ev->u.logout_flashnode.host_no);
3355 err = -ENODEV;
3356 goto put_host;
3357 }
3358
3359 idx = ev->u.logout_flashnode.flashnode_idx;
3360 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3361 if (!fnode_sess) {
3362 pr_err("%s could not find flashnode %u for host no %u\n",
3363 __func__, idx, ev->u.logout_flashnode.host_no);
3364 err = -ENODEV;
3365 goto put_host;
3366 }
3367
3368 dev = iscsi_find_flashnode_conn(fnode_sess);
3369 if (!dev) {
3370 err = -ENODEV;
3371 goto put_sess;
3372 }
3373
3374 fnode_conn = iscsi_dev_to_flash_conn(dev);
3375
3376 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3377 put_device(dev);
3378
3379 put_sess:
3380 put_device(&fnode_sess->dev);
3381
3382 put_host:
3383 scsi_host_put(shost);
3384
3385 exit_logout_fnode:
3386 return err;
3387 }
3388
3389 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3390 struct iscsi_uevent *ev)
3391 {
3392 struct Scsi_Host *shost;
3393 struct iscsi_cls_session *session;
3394 int err = 0;
3395
3396 if (!transport->logout_flashnode_sid) {
3397 err = -ENOSYS;
3398 goto exit_logout_sid;
3399 }
3400
3401 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3402 if (!shost) {
3403 pr_err("%s could not find host no %u\n",
3404 __func__, ev->u.logout_flashnode.host_no);
3405 err = -ENODEV;
3406 goto put_host;
3407 }
3408
3409 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3410 if (!session) {
3411 pr_err("%s could not find session id %u\n",
3412 __func__, ev->u.logout_flashnode_sid.sid);
3413 err = -EINVAL;
3414 goto put_host;
3415 }
3416
3417 err = transport->logout_flashnode_sid(session);
3418
3419 put_host:
3420 scsi_host_put(shost);
3421
3422 exit_logout_sid:
3423 return err;
3424 }
3425
3426 static int
3427 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3428 {
3429 struct iscsi_uevent *ev = nlmsg_data(nlh);
3430 struct Scsi_Host *shost = NULL;
3431 struct iscsi_internal *priv;
3432 struct sk_buff *skbhost_stats;
3433 struct nlmsghdr *nlhhost_stats;
3434 struct iscsi_uevent *evhost_stats;
3435 int host_stats_size = 0;
3436 int len, err = 0;
3437 char *buf;
3438
3439 if (!transport->get_host_stats)
3440 return -ENOSYS;
3441
3442 priv = iscsi_if_transport_lookup(transport);
3443 if (!priv)
3444 return -EINVAL;
3445
3446 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3447 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3448
3449 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3450 if (!shost) {
3451 pr_err("%s: failed. Could not find host no %u\n",
3452 __func__, ev->u.get_host_stats.host_no);
3453 return -ENODEV;
3454 }
3455
3456 do {
3457 int actual_size;
3458
3459 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3460 if (!skbhost_stats) {
3461 pr_err("cannot deliver host stats: OOM\n");
3462 err = -ENOMEM;
3463 goto exit_host_stats;
3464 }
3465
3466 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3467 (len - sizeof(*nlhhost_stats)), 0);
3468 evhost_stats = nlmsg_data(nlhhost_stats);
3469 memset(evhost_stats, 0, sizeof(*evhost_stats));
3470 evhost_stats->transport_handle = iscsi_handle(transport);
3471 evhost_stats->type = nlh->nlmsg_type;
3472 evhost_stats->u.get_host_stats.host_no =
3473 ev->u.get_host_stats.host_no;
3474 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3475 memset(buf, 0, host_stats_size);
3476
3477 err = transport->get_host_stats(shost, buf, host_stats_size);
3478 if (err) {
3479 kfree_skb(skbhost_stats);
3480 goto exit_host_stats;
3481 }
3482
3483 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3484 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3485 nlhhost_stats->nlmsg_len = actual_size;
3486
3487 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3488 GFP_KERNEL);
3489 } while (err < 0 && err != -ECONNREFUSED);
3490
3491 exit_host_stats:
3492 scsi_host_put(shost);
3493 return err;
3494 }
3495
3496
3497 static int
3498 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3499 {
3500 int err = 0;
3501 u32 portid;
3502 struct iscsi_uevent *ev = nlmsg_data(nlh);
3503 struct iscsi_transport *transport = NULL;
3504 struct iscsi_internal *priv;
3505 struct iscsi_cls_session *session;
3506 struct iscsi_cls_conn *conn;
3507 struct iscsi_endpoint *ep = NULL;
3508
3509 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3510 *group = ISCSI_NL_GRP_UIP;
3511 else
3512 *group = ISCSI_NL_GRP_ISCSID;
3513
3514 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3515 if (!priv)
3516 return -EINVAL;
3517 transport = priv->iscsi_transport;
3518
3519 if (!try_module_get(transport->owner))
3520 return -EINVAL;
3521
3522 portid = NETLINK_CB(skb).portid;
3523
3524 switch (nlh->nlmsg_type) {
3525 case ISCSI_UEVENT_CREATE_SESSION:
3526 err = iscsi_if_create_session(priv, ep, ev,
3527 portid,
3528 ev->u.c_session.initial_cmdsn,
3529 ev->u.c_session.cmds_max,
3530 ev->u.c_session.queue_depth);
3531 break;
3532 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3533 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3534 if (!ep) {
3535 err = -EINVAL;
3536 break;
3537 }
3538
3539 err = iscsi_if_create_session(priv, ep, ev,
3540 portid,
3541 ev->u.c_bound_session.initial_cmdsn,
3542 ev->u.c_bound_session.cmds_max,
3543 ev->u.c_bound_session.queue_depth);
3544 break;
3545 case ISCSI_UEVENT_DESTROY_SESSION:
3546 session = iscsi_session_lookup(ev->u.d_session.sid);
3547 if (!session)
3548 err = -EINVAL;
3549 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3550 err = -EBUSY;
3551 else
3552 transport->destroy_session(session);
3553 break;
3554 case ISCSI_UEVENT_UNBIND_SESSION:
3555 session = iscsi_session_lookup(ev->u.d_session.sid);
3556 if (session)
3557 scsi_queue_work(iscsi_session_to_shost(session),
3558 &session->unbind_work);
3559 else
3560 err = -EINVAL;
3561 break;
3562 case ISCSI_UEVENT_CREATE_CONN:
3563 err = iscsi_if_create_conn(transport, ev);
3564 break;
3565 case ISCSI_UEVENT_DESTROY_CONN:
3566 err = iscsi_if_destroy_conn(transport, ev);
3567 break;
3568 case ISCSI_UEVENT_BIND_CONN:
3569 session = iscsi_session_lookup(ev->u.b_conn.sid);
3570 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3571
3572 if (conn && conn->ep)
3573 iscsi_if_ep_disconnect(transport, conn->ep->id);
3574
3575 if (!session || !conn) {
3576 err = -EINVAL;
3577 break;
3578 }
3579
3580 ev->r.retcode = transport->bind_conn(session, conn,
3581 ev->u.b_conn.transport_eph,
3582 ev->u.b_conn.is_leading);
3583 if (ev->r.retcode || !transport->ep_connect)
3584 break;
3585
3586 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3587 if (ep) {
3588 ep->conn = conn;
3589
3590 mutex_lock(&conn->ep_mutex);
3591 conn->ep = ep;
3592 mutex_unlock(&conn->ep_mutex);
3593 } else
3594 iscsi_cls_conn_printk(KERN_ERR, conn,
3595 "Could not set ep conn "
3596 "binding\n");
3597 break;
3598 case ISCSI_UEVENT_SET_PARAM:
3599 err = iscsi_set_param(transport, ev);
3600 break;
3601 case ISCSI_UEVENT_START_CONN:
3602 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3603 if (conn)
3604 ev->r.retcode = transport->start_conn(conn);
3605 else
3606 err = -EINVAL;
3607 break;
3608 case ISCSI_UEVENT_STOP_CONN:
3609 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3610 if (conn)
3611 transport->stop_conn(conn, ev->u.stop_conn.flag);
3612 else
3613 err = -EINVAL;
3614 break;
3615 case ISCSI_UEVENT_SEND_PDU:
3616 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3617 if (conn)
3618 ev->r.retcode = transport->send_pdu(conn,
3619 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3620 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3621 ev->u.send_pdu.data_size);
3622 else
3623 err = -EINVAL;
3624 break;
3625 case ISCSI_UEVENT_GET_STATS:
3626 err = iscsi_if_get_stats(transport, nlh);
3627 break;
3628 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3629 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3630 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3631 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3632 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3633 break;
3634 case ISCSI_UEVENT_TGT_DSCVR:
3635 err = iscsi_tgt_dscvr(transport, ev);
3636 break;
3637 case ISCSI_UEVENT_SET_HOST_PARAM:
3638 err = iscsi_set_host_param(transport, ev);
3639 break;
3640 case ISCSI_UEVENT_PATH_UPDATE:
3641 err = iscsi_set_path(transport, ev);
3642 break;
3643 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3644 err = iscsi_set_iface_params(transport, ev,
3645 nlmsg_attrlen(nlh, sizeof(*ev)));
3646 break;
3647 case ISCSI_UEVENT_PING:
3648 err = iscsi_send_ping(transport, ev);
3649 break;
3650 case ISCSI_UEVENT_GET_CHAP:
3651 err = iscsi_get_chap(transport, nlh);
3652 break;
3653 case ISCSI_UEVENT_DELETE_CHAP:
3654 err = iscsi_delete_chap(transport, ev);
3655 break;
3656 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3657 err = iscsi_set_flashnode_param(transport, ev,
3658 nlmsg_attrlen(nlh,
3659 sizeof(*ev)));
3660 break;
3661 case ISCSI_UEVENT_NEW_FLASHNODE:
3662 err = iscsi_new_flashnode(transport, ev,
3663 nlmsg_attrlen(nlh, sizeof(*ev)));
3664 break;
3665 case ISCSI_UEVENT_DEL_FLASHNODE:
3666 err = iscsi_del_flashnode(transport, ev);
3667 break;
3668 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3669 err = iscsi_login_flashnode(transport, ev);
3670 break;
3671 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3672 err = iscsi_logout_flashnode(transport, ev);
3673 break;
3674 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3675 err = iscsi_logout_flashnode_sid(transport, ev);
3676 break;
3677 case ISCSI_UEVENT_SET_CHAP:
3678 err = iscsi_set_chap(transport, ev,
3679 nlmsg_attrlen(nlh, sizeof(*ev)));
3680 break;
3681 case ISCSI_UEVENT_GET_HOST_STATS:
3682 err = iscsi_get_host_stats(transport, nlh);
3683 break;
3684 default:
3685 err = -ENOSYS;
3686 break;
3687 }
3688
3689 module_put(transport->owner);
3690 return err;
3691 }
3692
3693
3694
3695
3696
3697 static void
3698 iscsi_if_rx(struct sk_buff *skb)
3699 {
3700 u32 portid = NETLINK_CB(skb).portid;
3701
3702 mutex_lock(&rx_queue_mutex);
3703 while (skb->len >= NLMSG_HDRLEN) {
3704 int err;
3705 uint32_t rlen;
3706 struct nlmsghdr *nlh;
3707 struct iscsi_uevent *ev;
3708 uint32_t group;
3709 int retries = ISCSI_SEND_MAX_ALLOWED;
3710
3711 nlh = nlmsg_hdr(skb);
3712 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
3713 skb->len < nlh->nlmsg_len) {
3714 break;
3715 }
3716
3717 ev = nlmsg_data(nlh);
3718 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3719 if (rlen > skb->len)
3720 rlen = skb->len;
3721
3722 err = iscsi_if_recv_msg(skb, nlh, &group);
3723 if (err) {
3724 ev->type = ISCSI_KEVENT_IF_ERROR;
3725 ev->iferror = err;
3726 }
3727 do {
3728
3729
3730
3731
3732
3733
3734 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3735 break;
3736 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3737 break;
3738 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
3739 ev, sizeof(*ev));
3740 if (err == -EAGAIN && --retries < 0) {
3741 printk(KERN_WARNING "Send reply failed, error %d\n", err);
3742 break;
3743 }
3744 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3745 skb_pull(skb, rlen);
3746 }
3747 mutex_unlock(&rx_queue_mutex);
3748 }
3749
3750 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3751 struct device_attribute dev_attr_##_prefix##_##_name = \
3752 __ATTR(_name,_mode,_show,_store)
3753
3754
3755
3756
3757 #define iscsi_conn_attr_show(param) \
3758 static ssize_t \
3759 show_conn_param_##param(struct device *dev, \
3760 struct device_attribute *attr, char *buf) \
3761 { \
3762 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3763 struct iscsi_transport *t = conn->transport; \
3764 return t->get_conn_param(conn, param, buf); \
3765 }
3766
3767 #define iscsi_conn_attr(field, param) \
3768 iscsi_conn_attr_show(param) \
3769 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3770 NULL);
3771
3772 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3773 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3774 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3775 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3776 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3777 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3778 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3779 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3780 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3781 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3782 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3783 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3784 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3785 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3786 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3787 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3788 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3789 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3790 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3791 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3792 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3793 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3794 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3795 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3796 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3797 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3798 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3799 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3800
3801
3802 #define iscsi_conn_ep_attr_show(param) \
3803 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3804 struct device_attribute *attr,\
3805 char *buf) \
3806 { \
3807 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3808 struct iscsi_transport *t = conn->transport; \
3809 struct iscsi_endpoint *ep; \
3810 ssize_t rc; \
3811 \
3812
3813
3814
3815 \
3816 mutex_lock(&conn->ep_mutex); \
3817 ep = conn->ep; \
3818 if (!ep && t->ep_connect) { \
3819 mutex_unlock(&conn->ep_mutex); \
3820 return -ENOTCONN; \
3821 } \
3822 \
3823 if (ep) \
3824 rc = t->get_ep_param(ep, param, buf); \
3825 else \
3826 rc = t->get_conn_param(conn, param, buf); \
3827 mutex_unlock(&conn->ep_mutex); \
3828 return rc; \
3829 }
3830
3831 #define iscsi_conn_ep_attr(field, param) \
3832 iscsi_conn_ep_attr_show(param) \
3833 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3834 show_conn_ep_param_##param, NULL);
3835
3836 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3837 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3838
3839 static struct attribute *iscsi_conn_attrs[] = {
3840 &dev_attr_conn_max_recv_dlength.attr,
3841 &dev_attr_conn_max_xmit_dlength.attr,
3842 &dev_attr_conn_header_digest.attr,
3843 &dev_attr_conn_data_digest.attr,
3844 &dev_attr_conn_ifmarker.attr,
3845 &dev_attr_conn_ofmarker.attr,
3846 &dev_attr_conn_address.attr,
3847 &dev_attr_conn_port.attr,
3848 &dev_attr_conn_exp_statsn.attr,
3849 &dev_attr_conn_persistent_address.attr,
3850 &dev_attr_conn_persistent_port.attr,
3851 &dev_attr_conn_ping_tmo.attr,
3852 &dev_attr_conn_recv_tmo.attr,
3853 &dev_attr_conn_local_port.attr,
3854 &dev_attr_conn_statsn.attr,
3855 &dev_attr_conn_keepalive_tmo.attr,
3856 &dev_attr_conn_max_segment_size.attr,
3857 &dev_attr_conn_tcp_timestamp_stat.attr,
3858 &dev_attr_conn_tcp_wsf_disable.attr,
3859 &dev_attr_conn_tcp_nagle_disable.attr,
3860 &dev_attr_conn_tcp_timer_scale.attr,
3861 &dev_attr_conn_tcp_timestamp_enable.attr,
3862 &dev_attr_conn_fragment_disable.attr,
3863 &dev_attr_conn_ipv4_tos.attr,
3864 &dev_attr_conn_ipv6_traffic_class.attr,
3865 &dev_attr_conn_ipv6_flow_label.attr,
3866 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3867 &dev_attr_conn_tcp_xmit_wsf.attr,
3868 &dev_attr_conn_tcp_recv_wsf.attr,
3869 &dev_attr_conn_local_ipaddr.attr,
3870 NULL,
3871 };
3872
3873 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3874 struct attribute *attr, int i)
3875 {
3876 struct device *cdev = container_of(kobj, struct device, kobj);
3877 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3878 struct iscsi_transport *t = conn->transport;
3879 int param;
3880
3881 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3882 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3883 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3884 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3885 else if (attr == &dev_attr_conn_header_digest.attr)
3886 param = ISCSI_PARAM_HDRDGST_EN;
3887 else if (attr == &dev_attr_conn_data_digest.attr)
3888 param = ISCSI_PARAM_DATADGST_EN;
3889 else if (attr == &dev_attr_conn_ifmarker.attr)
3890 param = ISCSI_PARAM_IFMARKER_EN;
3891 else if (attr == &dev_attr_conn_ofmarker.attr)
3892 param = ISCSI_PARAM_OFMARKER_EN;
3893 else if (attr == &dev_attr_conn_address.attr)
3894 param = ISCSI_PARAM_CONN_ADDRESS;
3895 else if (attr == &dev_attr_conn_port.attr)
3896 param = ISCSI_PARAM_CONN_PORT;
3897 else if (attr == &dev_attr_conn_exp_statsn.attr)
3898 param = ISCSI_PARAM_EXP_STATSN;
3899 else if (attr == &dev_attr_conn_persistent_address.attr)
3900 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3901 else if (attr == &dev_attr_conn_persistent_port.attr)
3902 param = ISCSI_PARAM_PERSISTENT_PORT;
3903 else if (attr == &dev_attr_conn_ping_tmo.attr)
3904 param = ISCSI_PARAM_PING_TMO;
3905 else if (attr == &dev_attr_conn_recv_tmo.attr)
3906 param = ISCSI_PARAM_RECV_TMO;
3907 else if (attr == &dev_attr_conn_local_port.attr)
3908 param = ISCSI_PARAM_LOCAL_PORT;
3909 else if (attr == &dev_attr_conn_statsn.attr)
3910 param = ISCSI_PARAM_STATSN;
3911 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3912 param = ISCSI_PARAM_KEEPALIVE_TMO;
3913 else if (attr == &dev_attr_conn_max_segment_size.attr)
3914 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3915 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3916 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3917 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3918 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3919 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3920 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3921 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3922 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3923 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3924 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3925 else if (attr == &dev_attr_conn_fragment_disable.attr)
3926 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3927 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3928 param = ISCSI_PARAM_IPV4_TOS;
3929 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3930 param = ISCSI_PARAM_IPV6_TC;
3931 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3932 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3933 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3934 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3935 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3936 param = ISCSI_PARAM_TCP_XMIT_WSF;
3937 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3938 param = ISCSI_PARAM_TCP_RECV_WSF;
3939 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3940 param = ISCSI_PARAM_LOCAL_IPADDR;
3941 else {
3942 WARN_ONCE(1, "Invalid conn attr");
3943 return 0;
3944 }
3945
3946 return t->attr_is_visible(ISCSI_PARAM, param);
3947 }
3948
3949 static struct attribute_group iscsi_conn_group = {
3950 .attrs = iscsi_conn_attrs,
3951 .is_visible = iscsi_conn_attr_is_visible,
3952 };
3953
3954
3955
3956
3957 #define iscsi_session_attr_show(param, perm) \
3958 static ssize_t \
3959 show_session_param_##param(struct device *dev, \
3960 struct device_attribute *attr, char *buf) \
3961 { \
3962 struct iscsi_cls_session *session = \
3963 iscsi_dev_to_session(dev->parent); \
3964 struct iscsi_transport *t = session->transport; \
3965 \
3966 if (perm && !capable(CAP_SYS_ADMIN)) \
3967 return -EACCES; \
3968 return t->get_session_param(session, param, buf); \
3969 }
3970
3971 #define iscsi_session_attr(field, param, perm) \
3972 iscsi_session_attr_show(param, perm) \
3973 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3974 NULL);
3975 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3976 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3977 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3978 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3979 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3980 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3981 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3982 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3983 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3984 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3985 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3986 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3987 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3988 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
3989 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3990 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
3991 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3992 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3993 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3994 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
3995 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3996 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3997 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3998 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3999 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4000 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4001 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4002 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4003 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4004 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4005 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4006 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4007 iscsi_session_attr(discovery_auth_optional,
4008 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4009 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4010 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4011 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4012 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4013 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4014 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4015 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4016
4017 static ssize_t
4018 show_priv_session_state(struct device *dev, struct device_attribute *attr,
4019 char *buf)
4020 {
4021 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4022 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4023 }
4024 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4025 NULL);
4026 static ssize_t
4027 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4028 char *buf)
4029 {
4030 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4031 return sprintf(buf, "%d\n", session->creator);
4032 }
4033 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4034 NULL);
4035 static ssize_t
4036 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4037 char *buf)
4038 {
4039 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4040 return sprintf(buf, "%d\n", session->target_id);
4041 }
4042 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4043 show_priv_session_target_id, NULL);
4044
4045 #define iscsi_priv_session_attr_show(field, format) \
4046 static ssize_t \
4047 show_priv_session_##field(struct device *dev, \
4048 struct device_attribute *attr, char *buf) \
4049 { \
4050 struct iscsi_cls_session *session = \
4051 iscsi_dev_to_session(dev->parent); \
4052 if (session->field == -1) \
4053 return sprintf(buf, "off\n"); \
4054 return sprintf(buf, format"\n", session->field); \
4055 }
4056
4057 #define iscsi_priv_session_attr_store(field) \
4058 static ssize_t \
4059 store_priv_session_##field(struct device *dev, \
4060 struct device_attribute *attr, \
4061 const char *buf, size_t count) \
4062 { \
4063 int val; \
4064 char *cp; \
4065 struct iscsi_cls_session *session = \
4066 iscsi_dev_to_session(dev->parent); \
4067 if ((session->state == ISCSI_SESSION_FREE) || \
4068 (session->state == ISCSI_SESSION_FAILED)) \
4069 return -EBUSY; \
4070 if (strncmp(buf, "off", 3) == 0) { \
4071 session->field = -1; \
4072 session->field##_sysfs_override = true; \
4073 } else { \
4074 val = simple_strtoul(buf, &cp, 0); \
4075 if (*cp != '\0' && *cp != '\n') \
4076 return -EINVAL; \
4077 session->field = val; \
4078 session->field##_sysfs_override = true; \
4079 } \
4080 return count; \
4081 }
4082
4083 #define iscsi_priv_session_rw_attr(field, format) \
4084 iscsi_priv_session_attr_show(field, format) \
4085 iscsi_priv_session_attr_store(field) \
4086 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4087 show_priv_session_##field, \
4088 store_priv_session_##field)
4089
4090 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4091
4092 static struct attribute *iscsi_session_attrs[] = {
4093 &dev_attr_sess_initial_r2t.attr,
4094 &dev_attr_sess_max_outstanding_r2t.attr,
4095 &dev_attr_sess_immediate_data.attr,
4096 &dev_attr_sess_first_burst_len.attr,
4097 &dev_attr_sess_max_burst_len.attr,
4098 &dev_attr_sess_data_pdu_in_order.attr,
4099 &dev_attr_sess_data_seq_in_order.attr,
4100 &dev_attr_sess_erl.attr,
4101 &dev_attr_sess_targetname.attr,
4102 &dev_attr_sess_tpgt.attr,
4103 &dev_attr_sess_password.attr,
4104 &dev_attr_sess_password_in.attr,
4105 &dev_attr_sess_username.attr,
4106 &dev_attr_sess_username_in.attr,
4107 &dev_attr_sess_fast_abort.attr,
4108 &dev_attr_sess_abort_tmo.attr,
4109 &dev_attr_sess_lu_reset_tmo.attr,
4110 &dev_attr_sess_tgt_reset_tmo.attr,
4111 &dev_attr_sess_ifacename.attr,
4112 &dev_attr_sess_initiatorname.attr,
4113 &dev_attr_sess_targetalias.attr,
4114 &dev_attr_sess_boot_root.attr,
4115 &dev_attr_sess_boot_nic.attr,
4116 &dev_attr_sess_boot_target.attr,
4117 &dev_attr_priv_sess_recovery_tmo.attr,
4118 &dev_attr_priv_sess_state.attr,
4119 &dev_attr_priv_sess_creator.attr,
4120 &dev_attr_sess_chap_out_idx.attr,
4121 &dev_attr_sess_chap_in_idx.attr,
4122 &dev_attr_priv_sess_target_id.attr,
4123 &dev_attr_sess_auto_snd_tgt_disable.attr,
4124 &dev_attr_sess_discovery_session.attr,
4125 &dev_attr_sess_portal_type.attr,
4126 &dev_attr_sess_chap_auth.attr,
4127 &dev_attr_sess_discovery_logout.attr,
4128 &dev_attr_sess_bidi_chap.attr,
4129 &dev_attr_sess_discovery_auth_optional.attr,
4130 &dev_attr_sess_def_time2wait.attr,
4131 &dev_attr_sess_def_time2retain.attr,
4132 &dev_attr_sess_isid.attr,
4133 &dev_attr_sess_tsid.attr,
4134 &dev_attr_sess_def_taskmgmt_tmo.attr,
4135 &dev_attr_sess_discovery_parent_idx.attr,
4136 &dev_attr_sess_discovery_parent_type.attr,
4137 NULL,
4138 };
4139
4140 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4141 struct attribute *attr, int i)
4142 {
4143 struct device *cdev = container_of(kobj, struct device, kobj);
4144 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4145 struct iscsi_transport *t = session->transport;
4146 int param;
4147
4148 if (attr == &dev_attr_sess_initial_r2t.attr)
4149 param = ISCSI_PARAM_INITIAL_R2T_EN;
4150 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4151 param = ISCSI_PARAM_MAX_R2T;
4152 else if (attr == &dev_attr_sess_immediate_data.attr)
4153 param = ISCSI_PARAM_IMM_DATA_EN;
4154 else if (attr == &dev_attr_sess_first_burst_len.attr)
4155 param = ISCSI_PARAM_FIRST_BURST;
4156 else if (attr == &dev_attr_sess_max_burst_len.attr)
4157 param = ISCSI_PARAM_MAX_BURST;
4158 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4159 param = ISCSI_PARAM_PDU_INORDER_EN;
4160 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4161 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4162 else if (attr == &dev_attr_sess_erl.attr)
4163 param = ISCSI_PARAM_ERL;
4164 else if (attr == &dev_attr_sess_targetname.attr)
4165 param = ISCSI_PARAM_TARGET_NAME;
4166 else if (attr == &dev_attr_sess_tpgt.attr)
4167 param = ISCSI_PARAM_TPGT;
4168 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4169 param = ISCSI_PARAM_CHAP_IN_IDX;
4170 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4171 param = ISCSI_PARAM_CHAP_OUT_IDX;
4172 else if (attr == &dev_attr_sess_password.attr)
4173 param = ISCSI_PARAM_USERNAME;
4174 else if (attr == &dev_attr_sess_password_in.attr)
4175 param = ISCSI_PARAM_USERNAME_IN;
4176 else if (attr == &dev_attr_sess_username.attr)
4177 param = ISCSI_PARAM_PASSWORD;
4178 else if (attr == &dev_attr_sess_username_in.attr)
4179 param = ISCSI_PARAM_PASSWORD_IN;
4180 else if (attr == &dev_attr_sess_fast_abort.attr)
4181 param = ISCSI_PARAM_FAST_ABORT;
4182 else if (attr == &dev_attr_sess_abort_tmo.attr)
4183 param = ISCSI_PARAM_ABORT_TMO;
4184 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4185 param = ISCSI_PARAM_LU_RESET_TMO;
4186 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4187 param = ISCSI_PARAM_TGT_RESET_TMO;
4188 else if (attr == &dev_attr_sess_ifacename.attr)
4189 param = ISCSI_PARAM_IFACE_NAME;
4190 else if (attr == &dev_attr_sess_initiatorname.attr)
4191 param = ISCSI_PARAM_INITIATOR_NAME;
4192 else if (attr == &dev_attr_sess_targetalias.attr)
4193 param = ISCSI_PARAM_TARGET_ALIAS;
4194 else if (attr == &dev_attr_sess_boot_root.attr)
4195 param = ISCSI_PARAM_BOOT_ROOT;
4196 else if (attr == &dev_attr_sess_boot_nic.attr)
4197 param = ISCSI_PARAM_BOOT_NIC;
4198 else if (attr == &dev_attr_sess_boot_target.attr)
4199 param = ISCSI_PARAM_BOOT_TARGET;
4200 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4201 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4202 else if (attr == &dev_attr_sess_discovery_session.attr)
4203 param = ISCSI_PARAM_DISCOVERY_SESS;
4204 else if (attr == &dev_attr_sess_portal_type.attr)
4205 param = ISCSI_PARAM_PORTAL_TYPE;
4206 else if (attr == &dev_attr_sess_chap_auth.attr)
4207 param = ISCSI_PARAM_CHAP_AUTH_EN;
4208 else if (attr == &dev_attr_sess_discovery_logout.attr)
4209 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4210 else if (attr == &dev_attr_sess_bidi_chap.attr)
4211 param = ISCSI_PARAM_BIDI_CHAP_EN;
4212 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4213 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4214 else if (attr == &dev_attr_sess_def_time2wait.attr)
4215 param = ISCSI_PARAM_DEF_TIME2WAIT;
4216 else if (attr == &dev_attr_sess_def_time2retain.attr)
4217 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4218 else if (attr == &dev_attr_sess_isid.attr)
4219 param = ISCSI_PARAM_ISID;
4220 else if (attr == &dev_attr_sess_tsid.attr)
4221 param = ISCSI_PARAM_TSID;
4222 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4223 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4224 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4225 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4226 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4227 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4228 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4229 return S_IRUGO | S_IWUSR;
4230 else if (attr == &dev_attr_priv_sess_state.attr)
4231 return S_IRUGO;
4232 else if (attr == &dev_attr_priv_sess_creator.attr)
4233 return S_IRUGO;
4234 else if (attr == &dev_attr_priv_sess_target_id.attr)
4235 return S_IRUGO;
4236 else {
4237 WARN_ONCE(1, "Invalid session attr");
4238 return 0;
4239 }
4240
4241 return t->attr_is_visible(ISCSI_PARAM, param);
4242 }
4243
4244 static struct attribute_group iscsi_session_group = {
4245 .attrs = iscsi_session_attrs,
4246 .is_visible = iscsi_session_attr_is_visible,
4247 };
4248
4249
4250
4251
4252 #define iscsi_host_attr_show(param) \
4253 static ssize_t \
4254 show_host_param_##param(struct device *dev, \
4255 struct device_attribute *attr, char *buf) \
4256 { \
4257 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4258 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4259 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4260 }
4261
4262 #define iscsi_host_attr(field, param) \
4263 iscsi_host_attr_show(param) \
4264 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4265 NULL);
4266
4267 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4268 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4269 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4270 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4271 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4272 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4273
4274 static struct attribute *iscsi_host_attrs[] = {
4275 &dev_attr_host_netdev.attr,
4276 &dev_attr_host_hwaddress.attr,
4277 &dev_attr_host_ipaddress.attr,
4278 &dev_attr_host_initiatorname.attr,
4279 &dev_attr_host_port_state.attr,
4280 &dev_attr_host_port_speed.attr,
4281 NULL,
4282 };
4283
4284 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4285 struct attribute *attr, int i)
4286 {
4287 struct device *cdev = container_of(kobj, struct device, kobj);
4288 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4289 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4290 int param;
4291
4292 if (attr == &dev_attr_host_netdev.attr)
4293 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4294 else if (attr == &dev_attr_host_hwaddress.attr)
4295 param = ISCSI_HOST_PARAM_HWADDRESS;
4296 else if (attr == &dev_attr_host_ipaddress.attr)
4297 param = ISCSI_HOST_PARAM_IPADDRESS;
4298 else if (attr == &dev_attr_host_initiatorname.attr)
4299 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4300 else if (attr == &dev_attr_host_port_state.attr)
4301 param = ISCSI_HOST_PARAM_PORT_STATE;
4302 else if (attr == &dev_attr_host_port_speed.attr)
4303 param = ISCSI_HOST_PARAM_PORT_SPEED;
4304 else {
4305 WARN_ONCE(1, "Invalid host attr");
4306 return 0;
4307 }
4308
4309 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4310 }
4311
4312 static struct attribute_group iscsi_host_group = {
4313 .attrs = iscsi_host_attrs,
4314 .is_visible = iscsi_host_attr_is_visible,
4315 };
4316
4317
4318 static const struct {
4319 enum iscsi_port_speed value;
4320 char *name;
4321 } iscsi_port_speed_names[] = {
4322 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4323 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4324 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4325 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4326 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4327 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4328 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4329 };
4330
4331 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4332 {
4333 int i;
4334 char *speed = "Unknown!";
4335 struct iscsi_cls_host *ihost = shost->shost_data;
4336 uint32_t port_speed = ihost->port_speed;
4337
4338 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4339 if (iscsi_port_speed_names[i].value & port_speed) {
4340 speed = iscsi_port_speed_names[i].name;
4341 break;
4342 }
4343 }
4344 return speed;
4345 }
4346 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4347
4348
4349 static const struct {
4350 enum iscsi_port_state value;
4351 char *name;
4352 } iscsi_port_state_names[] = {
4353 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4354 {ISCSI_PORT_STATE_UP, "LINK UP" },
4355 };
4356
4357 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4358 {
4359 int i;
4360 char *state = "Unknown!";
4361 struct iscsi_cls_host *ihost = shost->shost_data;
4362 uint32_t port_state = ihost->port_state;
4363
4364 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4365 if (iscsi_port_state_names[i].value & port_state) {
4366 state = iscsi_port_state_names[i].name;
4367 break;
4368 }
4369 }
4370 return state;
4371 }
4372 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4373
4374 static int iscsi_session_match(struct attribute_container *cont,
4375 struct device *dev)
4376 {
4377 struct iscsi_cls_session *session;
4378 struct Scsi_Host *shost;
4379 struct iscsi_internal *priv;
4380
4381 if (!iscsi_is_session_dev(dev))
4382 return 0;
4383
4384 session = iscsi_dev_to_session(dev);
4385 shost = iscsi_session_to_shost(session);
4386 if (!shost->transportt)
4387 return 0;
4388
4389 priv = to_iscsi_internal(shost->transportt);
4390 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4391 return 0;
4392
4393 return &priv->session_cont.ac == cont;
4394 }
4395
4396 static int iscsi_conn_match(struct attribute_container *cont,
4397 struct device *dev)
4398 {
4399 struct iscsi_cls_session *session;
4400 struct iscsi_cls_conn *conn;
4401 struct Scsi_Host *shost;
4402 struct iscsi_internal *priv;
4403
4404 if (!iscsi_is_conn_dev(dev))
4405 return 0;
4406
4407 conn = iscsi_dev_to_conn(dev);
4408 session = iscsi_dev_to_session(conn->dev.parent);
4409 shost = iscsi_session_to_shost(session);
4410
4411 if (!shost->transportt)
4412 return 0;
4413
4414 priv = to_iscsi_internal(shost->transportt);
4415 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4416 return 0;
4417
4418 return &priv->conn_cont.ac == cont;
4419 }
4420
4421 static int iscsi_host_match(struct attribute_container *cont,
4422 struct device *dev)
4423 {
4424 struct Scsi_Host *shost;
4425 struct iscsi_internal *priv;
4426
4427 if (!scsi_is_host_device(dev))
4428 return 0;
4429
4430 shost = dev_to_shost(dev);
4431 if (!shost->transportt ||
4432 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4433 return 0;
4434
4435 priv = to_iscsi_internal(shost->transportt);
4436 return &priv->t.host_attrs.ac == cont;
4437 }
4438
4439 struct scsi_transport_template *
4440 iscsi_register_transport(struct iscsi_transport *tt)
4441 {
4442 struct iscsi_internal *priv;
4443 unsigned long flags;
4444 int err;
4445
4446 BUG_ON(!tt);
4447
4448 priv = iscsi_if_transport_lookup(tt);
4449 if (priv)
4450 return NULL;
4451
4452 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4453 if (!priv)
4454 return NULL;
4455 INIT_LIST_HEAD(&priv->list);
4456 priv->iscsi_transport = tt;
4457 priv->t.user_scan = iscsi_user_scan;
4458 priv->t.create_work_queue = 1;
4459
4460 priv->dev.class = &iscsi_transport_class;
4461 dev_set_name(&priv->dev, "%s", tt->name);
4462 err = device_register(&priv->dev);
4463 if (err)
4464 goto free_priv;
4465
4466 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4467 if (err)
4468 goto unregister_dev;
4469
4470
4471 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4472 priv->t.host_attrs.ac.match = iscsi_host_match;
4473 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4474 priv->t.host_size = sizeof(struct iscsi_cls_host);
4475 transport_container_register(&priv->t.host_attrs);
4476
4477
4478 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4479 priv->conn_cont.ac.match = iscsi_conn_match;
4480 priv->conn_cont.ac.grp = &iscsi_conn_group;
4481 transport_container_register(&priv->conn_cont);
4482
4483
4484 priv->session_cont.ac.class = &iscsi_session_class.class;
4485 priv->session_cont.ac.match = iscsi_session_match;
4486 priv->session_cont.ac.grp = &iscsi_session_group;
4487 transport_container_register(&priv->session_cont);
4488
4489 spin_lock_irqsave(&iscsi_transport_lock, flags);
4490 list_add(&priv->list, &iscsi_transports);
4491 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4492
4493 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4494 return &priv->t;
4495
4496 unregister_dev:
4497 device_unregister(&priv->dev);
4498 return NULL;
4499 free_priv:
4500 kfree(priv);
4501 return NULL;
4502 }
4503 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4504
4505 int iscsi_unregister_transport(struct iscsi_transport *tt)
4506 {
4507 struct iscsi_internal *priv;
4508 unsigned long flags;
4509
4510 BUG_ON(!tt);
4511
4512 mutex_lock(&rx_queue_mutex);
4513
4514 priv = iscsi_if_transport_lookup(tt);
4515 BUG_ON (!priv);
4516
4517 spin_lock_irqsave(&iscsi_transport_lock, flags);
4518 list_del(&priv->list);
4519 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4520
4521 transport_container_unregister(&priv->conn_cont);
4522 transport_container_unregister(&priv->session_cont);
4523 transport_container_unregister(&priv->t.host_attrs);
4524
4525 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4526 device_unregister(&priv->dev);
4527 mutex_unlock(&rx_queue_mutex);
4528
4529 return 0;
4530 }
4531 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4532
4533 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4534 struct device *dev, const char *fmt, ...)
4535 {
4536 struct va_format vaf;
4537 va_list args;
4538
4539 va_start(args, fmt);
4540 vaf.fmt = fmt;
4541 vaf.va = &args;
4542 trace(dev, &vaf);
4543 va_end(args);
4544 }
4545 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4546
4547 static __init int iscsi_transport_init(void)
4548 {
4549 int err;
4550 struct netlink_kernel_cfg cfg = {
4551 .groups = 1,
4552 .input = iscsi_if_rx,
4553 };
4554 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4555 ISCSI_TRANSPORT_VERSION);
4556
4557 atomic_set(&iscsi_session_nr, 0);
4558
4559 err = class_register(&iscsi_transport_class);
4560 if (err)
4561 return err;
4562
4563 err = class_register(&iscsi_endpoint_class);
4564 if (err)
4565 goto unregister_transport_class;
4566
4567 err = class_register(&iscsi_iface_class);
4568 if (err)
4569 goto unregister_endpoint_class;
4570
4571 err = transport_class_register(&iscsi_host_class);
4572 if (err)
4573 goto unregister_iface_class;
4574
4575 err = transport_class_register(&iscsi_connection_class);
4576 if (err)
4577 goto unregister_host_class;
4578
4579 err = transport_class_register(&iscsi_session_class);
4580 if (err)
4581 goto unregister_conn_class;
4582
4583 err = bus_register(&iscsi_flashnode_bus);
4584 if (err)
4585 goto unregister_session_class;
4586
4587 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4588 if (!nls) {
4589 err = -ENOBUFS;
4590 goto unregister_flashnode_bus;
4591 }
4592
4593 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4594 if (!iscsi_eh_timer_workq) {
4595 err = -ENOMEM;
4596 goto release_nls;
4597 }
4598
4599 return 0;
4600
4601 release_nls:
4602 netlink_kernel_release(nls);
4603 unregister_flashnode_bus:
4604 bus_unregister(&iscsi_flashnode_bus);
4605 unregister_session_class:
4606 transport_class_unregister(&iscsi_session_class);
4607 unregister_conn_class:
4608 transport_class_unregister(&iscsi_connection_class);
4609 unregister_host_class:
4610 transport_class_unregister(&iscsi_host_class);
4611 unregister_iface_class:
4612 class_unregister(&iscsi_iface_class);
4613 unregister_endpoint_class:
4614 class_unregister(&iscsi_endpoint_class);
4615 unregister_transport_class:
4616 class_unregister(&iscsi_transport_class);
4617 return err;
4618 }
4619
4620 static void __exit iscsi_transport_exit(void)
4621 {
4622 destroy_workqueue(iscsi_eh_timer_workq);
4623 netlink_kernel_release(nls);
4624 bus_unregister(&iscsi_flashnode_bus);
4625 transport_class_unregister(&iscsi_connection_class);
4626 transport_class_unregister(&iscsi_session_class);
4627 transport_class_unregister(&iscsi_host_class);
4628 class_unregister(&iscsi_endpoint_class);
4629 class_unregister(&iscsi_iface_class);
4630 class_unregister(&iscsi_transport_class);
4631 }
4632
4633 module_init(iscsi_transport_init);
4634 module_exit(iscsi_transport_exit);
4635
4636 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4637 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4638 "Alex Aizman <itn780@yahoo.com>");
4639 MODULE_DESCRIPTION("iSCSI Transport Interface");
4640 MODULE_LICENSE("GPL");
4641 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4642 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);