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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * iSCSI transport class definitions
4 *
5 * Copyright (C) IBM Corporation, 2004
6 * Copyright (C) Mike Christie, 2004 - 2005
7 * Copyright (C) Dmitry Yusupov, 2004 - 2005
8 * Copyright (C) Alex Aizman, 2004 - 2005
9 */
10#include <linux/module.h>
11#include <linux/mutex.h>
12#include <linux/slab.h>
13#include <linux/bsg-lib.h>
14#include <linux/idr.h>
15#include <net/tcp.h>
16#include <scsi/scsi.h>
17#include <scsi/scsi_host.h>
18#include <scsi/scsi_device.h>
19#include <scsi/scsi_transport.h>
20#include <scsi/scsi_transport_iscsi.h>
21#include <scsi/iscsi_if.h>
22#include <scsi/scsi_cmnd.h>
23#include <scsi/scsi_bsg_iscsi.h>
24
25#define ISCSI_TRANSPORT_VERSION "2.0-870"
26
27#define ISCSI_SEND_MAX_ALLOWED 10
28
29#define CREATE_TRACE_POINTS
30#include <trace/events/iscsi.h>
31
32/*
33 * Export tracepoint symbols to be used by other modules.
34 */
35EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);
36EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);
37EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);
38EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);
39EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);
40
41static int dbg_session;
42module_param_named(debug_session, dbg_session, int,
43 S_IRUGO | S_IWUSR);
44MODULE_PARM_DESC(debug_session,
45 "Turn on debugging for sessions in scsi_transport_iscsi "
46 "module. Set to 1 to turn on, and zero to turn off. Default "
47 "is off.");
48
49static int dbg_conn;
50module_param_named(debug_conn, dbg_conn, int,
51 S_IRUGO | S_IWUSR);
52MODULE_PARM_DESC(debug_conn,
53 "Turn on debugging for connections in scsi_transport_iscsi "
54 "module. Set to 1 to turn on, and zero to turn off. Default "
55 "is off.");
56
57#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
58 do { \
59 if (dbg_session) \
60 iscsi_cls_session_printk(KERN_INFO, _session, \
61 "%s: " dbg_fmt, \
62 __func__, ##arg); \
63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \
64 &(_session)->dev, \
65 "%s " dbg_fmt, __func__, ##arg); \
66 } while (0);
67
68#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
69 do { \
70 if (dbg_conn) \
71 iscsi_cls_conn_printk(KERN_INFO, _conn, \
72 "%s: " dbg_fmt, \
73 __func__, ##arg); \
74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \
75 &(_conn)->dev, \
76 "%s " dbg_fmt, __func__, ##arg); \
77 } while (0);
78
79struct iscsi_internal {
80 struct scsi_transport_template t;
81 struct iscsi_transport *iscsi_transport;
82 struct list_head list;
83 struct device dev;
84
85 struct transport_container conn_cont;
86 struct transport_container session_cont;
87};
88
89static DEFINE_IDR(iscsi_ep_idr);
90static DEFINE_MUTEX(iscsi_ep_idr_mutex);
91
92static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
93
94static struct workqueue_struct *iscsi_conn_cleanup_workq;
95
96static DEFINE_IDA(iscsi_sess_ida);
97/*
98 * list of registered transports and lock that must
99 * be held while accessing list. The iscsi_transport_lock must
100 * be acquired after the rx_queue_mutex.
101 */
102static LIST_HEAD(iscsi_transports);
103static DEFINE_SPINLOCK(iscsi_transport_lock);
104
105#define to_iscsi_internal(tmpl) \
106 container_of(tmpl, struct iscsi_internal, t)
107
108#define dev_to_iscsi_internal(_dev) \
109 container_of(_dev, struct iscsi_internal, dev)
110
111static void iscsi_transport_release(struct device *dev)
112{
113 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
114 kfree(priv);
115}
116
117/*
118 * iscsi_transport_class represents the iscsi_transports that are
119 * registered.
120 */
121static struct class iscsi_transport_class = {
122 .name = "iscsi_transport",
123 .dev_release = iscsi_transport_release,
124};
125
126static ssize_t
127show_transport_handle(struct device *dev, struct device_attribute *attr,
128 char *buf)
129{
130 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
131
132 if (!capable(CAP_SYS_ADMIN))
133 return -EACCES;
134 return sysfs_emit(buf, "%llu\n",
135 (unsigned long long)iscsi_handle(priv->iscsi_transport));
136}
137static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
138
139#define show_transport_attr(name, format) \
140static ssize_t \
141show_transport_##name(struct device *dev, \
142 struct device_attribute *attr,char *buf) \
143{ \
144 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
145 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
146} \
147static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
148
149show_transport_attr(caps, "0x%x");
150
151static struct attribute *iscsi_transport_attrs[] = {
152 &dev_attr_handle.attr,
153 &dev_attr_caps.attr,
154 NULL,
155};
156
157static struct attribute_group iscsi_transport_group = {
158 .attrs = iscsi_transport_attrs,
159};
160
161/*
162 * iSCSI endpoint attrs
163 */
164#define iscsi_dev_to_endpoint(_dev) \
165 container_of(_dev, struct iscsi_endpoint, dev)
166
167#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
168struct device_attribute dev_attr_##_prefix##_##_name = \
169 __ATTR(_name,_mode,_show,_store)
170
171static void iscsi_endpoint_release(struct device *dev)
172{
173 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
174
175 mutex_lock(&iscsi_ep_idr_mutex);
176 idr_remove(&iscsi_ep_idr, ep->id);
177 mutex_unlock(&iscsi_ep_idr_mutex);
178
179 kfree(ep);
180}
181
182static struct class iscsi_endpoint_class = {
183 .name = "iscsi_endpoint",
184 .dev_release = iscsi_endpoint_release,
185};
186
187static ssize_t
188show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
189{
190 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
191 return sysfs_emit(buf, "%d\n", ep->id);
192}
193static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
194
195static struct attribute *iscsi_endpoint_attrs[] = {
196 &dev_attr_ep_handle.attr,
197 NULL,
198};
199
200static struct attribute_group iscsi_endpoint_group = {
201 .attrs = iscsi_endpoint_attrs,
202};
203
204struct iscsi_endpoint *
205iscsi_create_endpoint(int dd_size)
206{
207 struct iscsi_endpoint *ep;
208 int err, id;
209
210 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
211 if (!ep)
212 return NULL;
213
214 mutex_lock(&iscsi_ep_idr_mutex);
215
216 /*
217 * First endpoint id should be 1 to comply with user space
218 * applications (iscsid).
219 */
220 id = idr_alloc(&iscsi_ep_idr, ep, 1, -1, GFP_NOIO);
221 if (id < 0) {
222 mutex_unlock(&iscsi_ep_idr_mutex);
223 printk(KERN_ERR "Could not allocate endpoint ID. Error %d.\n",
224 id);
225 goto free_ep;
226 }
227 mutex_unlock(&iscsi_ep_idr_mutex);
228
229 ep->id = id;
230 ep->dev.class = &iscsi_endpoint_class;
231 dev_set_name(&ep->dev, "ep-%d", id);
232 err = device_register(&ep->dev);
233 if (err)
234 goto put_dev;
235
236 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
237 if (err)
238 goto unregister_dev;
239
240 if (dd_size)
241 ep->dd_data = &ep[1];
242 return ep;
243
244unregister_dev:
245 device_unregister(&ep->dev);
246 return NULL;
247
248put_dev:
249 mutex_lock(&iscsi_ep_idr_mutex);
250 idr_remove(&iscsi_ep_idr, id);
251 mutex_unlock(&iscsi_ep_idr_mutex);
252 put_device(&ep->dev);
253 return NULL;
254free_ep:
255 kfree(ep);
256 return NULL;
257}
258EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
259
260void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
261{
262 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
263 device_unregister(&ep->dev);
264}
265EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
266
267void iscsi_put_endpoint(struct iscsi_endpoint *ep)
268{
269 put_device(&ep->dev);
270}
271EXPORT_SYMBOL_GPL(iscsi_put_endpoint);
272
273/**
274 * iscsi_lookup_endpoint - get ep from handle
275 * @handle: endpoint handle
276 *
277 * Caller must do a iscsi_put_endpoint.
278 */
279struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
280{
281 struct iscsi_endpoint *ep;
282
283 mutex_lock(&iscsi_ep_idr_mutex);
284 ep = idr_find(&iscsi_ep_idr, handle);
285 if (!ep)
286 goto unlock;
287
288 get_device(&ep->dev);
289unlock:
290 mutex_unlock(&iscsi_ep_idr_mutex);
291 return ep;
292}
293EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
294
295/*
296 * Interface to display network param to sysfs
297 */
298
299static void iscsi_iface_release(struct device *dev)
300{
301 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
302 struct device *parent = iface->dev.parent;
303
304 kfree(iface);
305 put_device(parent);
306}
307
308
309static struct class iscsi_iface_class = {
310 .name = "iscsi_iface",
311 .dev_release = iscsi_iface_release,
312};
313
314#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
315struct device_attribute dev_attr_##_prefix##_##_name = \
316 __ATTR(_name, _mode, _show, _store)
317
318/* iface attrs show */
319#define iscsi_iface_attr_show(type, name, param_type, param) \
320static ssize_t \
321show_##type##_##name(struct device *dev, struct device_attribute *attr, \
322 char *buf) \
323{ \
324 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
325 struct iscsi_transport *t = iface->transport; \
326 return t->get_iface_param(iface, param_type, param, buf); \
327} \
328
329#define iscsi_iface_net_attr(type, name, param) \
330 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
331static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
332
333#define iscsi_iface_attr(type, name, param) \
334 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
335static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
336
337/* generic read only ipv4 attribute */
338iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
339iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
340iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
341iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
342iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
343 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
344iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
345 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
346iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
347iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
348iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
349 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
350iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
351 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
352iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
353 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
354iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
355 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
356iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
357 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
358iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
359 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
360iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
361 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
362iscsi_iface_net_attr(ipv4_iface, fragment_disable,
363 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
364iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
365 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
366iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
367
368/* generic read only ipv6 attribute */
369iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
370iscsi_iface_net_attr(ipv6_iface, link_local_addr,
371 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
372iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
373iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
374 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
375iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
376 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
377iscsi_iface_net_attr(ipv6_iface, link_local_state,
378 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
379iscsi_iface_net_attr(ipv6_iface, router_state,
380 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
381iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
382 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
383iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
384iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
385iscsi_iface_net_attr(ipv6_iface, traffic_class,
386 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
387iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
388iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
389 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
390iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
391 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
392iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
393 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
394iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
395 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
396iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
397 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
398
399/* common read only iface attribute */
400iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
401iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
402iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
403iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
404iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
405iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
406iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
407iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
408iscsi_iface_net_attr(iface, tcp_nagle_disable,
409 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
410iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
411iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
412iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
413iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
414iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
415iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
416
417/* common iscsi specific settings attributes */
418iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
419iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
420iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
421iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
422iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
423iscsi_iface_attr(iface, data_seq_in_order,
424 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
425iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
426iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
427iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
428iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
429iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
430iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
431iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
432iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
433iscsi_iface_attr(iface, discovery_auth_optional,
434 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
435iscsi_iface_attr(iface, discovery_logout,
436 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
437iscsi_iface_attr(iface, strict_login_comp_en,
438 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
439iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
440
441static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
442 struct attribute *attr, int i)
443{
444 struct device *dev = container_of(kobj, struct device, kobj);
445 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
446 struct iscsi_transport *t = iface->transport;
447 int param = -1;
448
449 if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
450 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
451 else if (attr == &dev_attr_iface_header_digest.attr)
452 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
453 else if (attr == &dev_attr_iface_data_digest.attr)
454 param = ISCSI_IFACE_PARAM_DATADGST_EN;
455 else if (attr == &dev_attr_iface_immediate_data.attr)
456 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
457 else if (attr == &dev_attr_iface_initial_r2t.attr)
458 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
459 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
460 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
461 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
462 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
463 else if (attr == &dev_attr_iface_erl.attr)
464 param = ISCSI_IFACE_PARAM_ERL;
465 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
466 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
467 else if (attr == &dev_attr_iface_first_burst_len.attr)
468 param = ISCSI_IFACE_PARAM_FIRST_BURST;
469 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
470 param = ISCSI_IFACE_PARAM_MAX_R2T;
471 else if (attr == &dev_attr_iface_max_burst_len.attr)
472 param = ISCSI_IFACE_PARAM_MAX_BURST;
473 else if (attr == &dev_attr_iface_chap_auth.attr)
474 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
475 else if (attr == &dev_attr_iface_bidi_chap.attr)
476 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
477 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
478 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
479 else if (attr == &dev_attr_iface_discovery_logout.attr)
480 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
481 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
482 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
483 else if (attr == &dev_attr_iface_initiator_name.attr)
484 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
485
486 if (param != -1)
487 return t->attr_is_visible(ISCSI_IFACE_PARAM, param);
488
489 if (attr == &dev_attr_iface_enabled.attr)
490 param = ISCSI_NET_PARAM_IFACE_ENABLE;
491 else if (attr == &dev_attr_iface_vlan_id.attr)
492 param = ISCSI_NET_PARAM_VLAN_ID;
493 else if (attr == &dev_attr_iface_vlan_priority.attr)
494 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
495 else if (attr == &dev_attr_iface_vlan_enabled.attr)
496 param = ISCSI_NET_PARAM_VLAN_ENABLED;
497 else if (attr == &dev_attr_iface_mtu.attr)
498 param = ISCSI_NET_PARAM_MTU;
499 else if (attr == &dev_attr_iface_port.attr)
500 param = ISCSI_NET_PARAM_PORT;
501 else if (attr == &dev_attr_iface_ipaddress_state.attr)
502 param = ISCSI_NET_PARAM_IPADDR_STATE;
503 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
504 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
505 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
506 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
507 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
508 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
509 else if (attr == &dev_attr_iface_tcp_wsf.attr)
510 param = ISCSI_NET_PARAM_TCP_WSF;
511 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
512 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
513 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
514 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
515 else if (attr == &dev_attr_iface_cache_id.attr)
516 param = ISCSI_NET_PARAM_CACHE_ID;
517 else if (attr == &dev_attr_iface_redirect_en.attr)
518 param = ISCSI_NET_PARAM_REDIRECT_EN;
519 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
520 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
521 param = ISCSI_NET_PARAM_IPV4_ADDR;
522 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
523 param = ISCSI_NET_PARAM_IPV4_GW;
524 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
525 param = ISCSI_NET_PARAM_IPV4_SUBNET;
526 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
527 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
528 else if (attr ==
529 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
530 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
531 else if (attr ==
532 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
533 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
534 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
535 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
536 else if (attr == &dev_attr_ipv4_iface_tos.attr)
537 param = ISCSI_NET_PARAM_IPV4_TOS;
538 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
539 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
540 else if (attr ==
541 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
542 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
543 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
544 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
545 else if (attr ==
546 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
547 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
548 else if (attr ==
549 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
550 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
551 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
552 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
553 else if (attr ==
554 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
555 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
556 else if (attr ==
557 &dev_attr_ipv4_iface_fragment_disable.attr)
558 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
559 else if (attr ==
560 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
561 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
562 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
563 param = ISCSI_NET_PARAM_IPV4_TTL;
564 else
565 return 0;
566 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
567 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
568 param = ISCSI_NET_PARAM_IPV6_ADDR;
569 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
570 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
571 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
572 param = ISCSI_NET_PARAM_IPV6_ROUTER;
573 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
574 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
575 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
576 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
577 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
578 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
579 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
580 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
581 else if (attr ==
582 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
583 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
584 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
585 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
586 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
587 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
588 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
589 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
590 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
591 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
592 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
593 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
594 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
595 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
596 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
597 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
598 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
599 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
600 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
601 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
602 else
603 return 0;
604 } else {
605 WARN_ONCE(1, "Invalid iface attr");
606 return 0;
607 }
608
609 return t->attr_is_visible(ISCSI_NET_PARAM, param);
610}
611
612static struct attribute *iscsi_iface_attrs[] = {
613 &dev_attr_iface_enabled.attr,
614 &dev_attr_iface_vlan_id.attr,
615 &dev_attr_iface_vlan_priority.attr,
616 &dev_attr_iface_vlan_enabled.attr,
617 &dev_attr_ipv4_iface_ipaddress.attr,
618 &dev_attr_ipv4_iface_gateway.attr,
619 &dev_attr_ipv4_iface_subnet.attr,
620 &dev_attr_ipv4_iface_bootproto.attr,
621 &dev_attr_ipv6_iface_ipaddress.attr,
622 &dev_attr_ipv6_iface_link_local_addr.attr,
623 &dev_attr_ipv6_iface_router_addr.attr,
624 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
625 &dev_attr_ipv6_iface_link_local_autocfg.attr,
626 &dev_attr_iface_mtu.attr,
627 &dev_attr_iface_port.attr,
628 &dev_attr_iface_ipaddress_state.attr,
629 &dev_attr_iface_delayed_ack_en.attr,
630 &dev_attr_iface_tcp_nagle_disable.attr,
631 &dev_attr_iface_tcp_wsf_disable.attr,
632 &dev_attr_iface_tcp_wsf.attr,
633 &dev_attr_iface_tcp_timer_scale.attr,
634 &dev_attr_iface_tcp_timestamp_en.attr,
635 &dev_attr_iface_cache_id.attr,
636 &dev_attr_iface_redirect_en.attr,
637 &dev_attr_iface_def_taskmgmt_tmo.attr,
638 &dev_attr_iface_header_digest.attr,
639 &dev_attr_iface_data_digest.attr,
640 &dev_attr_iface_immediate_data.attr,
641 &dev_attr_iface_initial_r2t.attr,
642 &dev_attr_iface_data_seq_in_order.attr,
643 &dev_attr_iface_data_pdu_in_order.attr,
644 &dev_attr_iface_erl.attr,
645 &dev_attr_iface_max_recv_dlength.attr,
646 &dev_attr_iface_first_burst_len.attr,
647 &dev_attr_iface_max_outstanding_r2t.attr,
648 &dev_attr_iface_max_burst_len.attr,
649 &dev_attr_iface_chap_auth.attr,
650 &dev_attr_iface_bidi_chap.attr,
651 &dev_attr_iface_discovery_auth_optional.attr,
652 &dev_attr_iface_discovery_logout.attr,
653 &dev_attr_iface_strict_login_comp_en.attr,
654 &dev_attr_iface_initiator_name.attr,
655 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
656 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
657 &dev_attr_ipv4_iface_tos_en.attr,
658 &dev_attr_ipv4_iface_tos.attr,
659 &dev_attr_ipv4_iface_grat_arp_en.attr,
660 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
661 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
662 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
663 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
664 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
665 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
666 &dev_attr_ipv4_iface_fragment_disable.attr,
667 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
668 &dev_attr_ipv4_iface_ttl.attr,
669 &dev_attr_ipv6_iface_link_local_state.attr,
670 &dev_attr_ipv6_iface_router_state.attr,
671 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
672 &dev_attr_ipv6_iface_mld_en.attr,
673 &dev_attr_ipv6_iface_flow_label.attr,
674 &dev_attr_ipv6_iface_traffic_class.attr,
675 &dev_attr_ipv6_iface_hop_limit.attr,
676 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
677 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
678 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
679 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
680 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
681 NULL,
682};
683
684static struct attribute_group iscsi_iface_group = {
685 .attrs = iscsi_iface_attrs,
686 .is_visible = iscsi_iface_attr_is_visible,
687};
688
689/* convert iscsi_ipaddress_state values to ascii string name */
690static const struct {
691 enum iscsi_ipaddress_state value;
692 char *name;
693} iscsi_ipaddress_state_names[] = {
694 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
695 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
696 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
697 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
698 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
699 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
700 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
701};
702
703char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
704{
705 int i;
706 char *state = NULL;
707
708 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
709 if (iscsi_ipaddress_state_names[i].value == port_state) {
710 state = iscsi_ipaddress_state_names[i].name;
711 break;
712 }
713 }
714 return state;
715}
716EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
717
718/* convert iscsi_router_state values to ascii string name */
719static const struct {
720 enum iscsi_router_state value;
721 char *name;
722} iscsi_router_state_names[] = {
723 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
724 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
725 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
726 {ISCSI_ROUTER_STATE_STALE, "Stale" },
727};
728
729char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
730{
731 int i;
732 char *state = NULL;
733
734 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
735 if (iscsi_router_state_names[i].value == router_state) {
736 state = iscsi_router_state_names[i].name;
737 break;
738 }
739 }
740 return state;
741}
742EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
743
744struct iscsi_iface *
745iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
746 uint32_t iface_type, uint32_t iface_num, int dd_size)
747{
748 struct iscsi_iface *iface;
749 int err;
750
751 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
752 if (!iface)
753 return NULL;
754
755 iface->transport = transport;
756 iface->iface_type = iface_type;
757 iface->iface_num = iface_num;
758 iface->dev.release = iscsi_iface_release;
759 iface->dev.class = &iscsi_iface_class;
760 /* parent reference released in iscsi_iface_release */
761 iface->dev.parent = get_device(&shost->shost_gendev);
762 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
763 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
764 iface_num);
765 else
766 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
767 iface_num);
768
769 err = device_register(&iface->dev);
770 if (err)
771 goto put_dev;
772
773 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
774 if (err)
775 goto unreg_iface;
776
777 if (dd_size)
778 iface->dd_data = &iface[1];
779 return iface;
780
781unreg_iface:
782 device_unregister(&iface->dev);
783 return NULL;
784
785put_dev:
786 put_device(&iface->dev);
787 return NULL;
788}
789EXPORT_SYMBOL_GPL(iscsi_create_iface);
790
791void iscsi_destroy_iface(struct iscsi_iface *iface)
792{
793 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
794 device_unregister(&iface->dev);
795}
796EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
797
798/*
799 * Interface to display flash node params to sysfs
800 */
801
802#define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
803struct device_attribute dev_attr_##_prefix##_##_name = \
804 __ATTR(_name, _mode, _show, _store)
805
806/* flash node session attrs show */
807#define iscsi_flashnode_sess_attr_show(type, name, param) \
808static ssize_t \
809show_##type##_##name(struct device *dev, struct device_attribute *attr, \
810 char *buf) \
811{ \
812 struct iscsi_bus_flash_session *fnode_sess = \
813 iscsi_dev_to_flash_session(dev);\
814 struct iscsi_transport *t = fnode_sess->transport; \
815 return t->get_flashnode_param(fnode_sess, param, buf); \
816} \
817
818
819#define iscsi_flashnode_sess_attr(type, name, param) \
820 iscsi_flashnode_sess_attr_show(type, name, param) \
821static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
822 show_##type##_##name, NULL);
823
824/* Flash node session attributes */
825
826iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
827 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
828iscsi_flashnode_sess_attr(fnode, discovery_session,
829 ISCSI_FLASHNODE_DISCOVERY_SESS);
830iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
831iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
832iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
833iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
834iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
835 ISCSI_FLASHNODE_DATASEQ_INORDER);
836iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
837 ISCSI_FLASHNODE_PDU_INORDER);
838iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
839iscsi_flashnode_sess_attr(fnode, discovery_logout,
840 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
841iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
842iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
843 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
844iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
845iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
846iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
847iscsi_flashnode_sess_attr(fnode, def_time2retain,
848 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
849iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
850iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
851iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
852iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
853iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
854 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
855iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
856iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
857iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
858iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
859 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
860iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
861 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
862iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
863iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
864iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
865iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
866iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
867iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
868iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
869
870static struct attribute *iscsi_flashnode_sess_attrs[] = {
871 &dev_attr_fnode_auto_snd_tgt_disable.attr,
872 &dev_attr_fnode_discovery_session.attr,
873 &dev_attr_fnode_portal_type.attr,
874 &dev_attr_fnode_entry_enable.attr,
875 &dev_attr_fnode_immediate_data.attr,
876 &dev_attr_fnode_initial_r2t.attr,
877 &dev_attr_fnode_data_seq_in_order.attr,
878 &dev_attr_fnode_data_pdu_in_order.attr,
879 &dev_attr_fnode_chap_auth.attr,
880 &dev_attr_fnode_discovery_logout.attr,
881 &dev_attr_fnode_bidi_chap.attr,
882 &dev_attr_fnode_discovery_auth_optional.attr,
883 &dev_attr_fnode_erl.attr,
884 &dev_attr_fnode_first_burst_len.attr,
885 &dev_attr_fnode_def_time2wait.attr,
886 &dev_attr_fnode_def_time2retain.attr,
887 &dev_attr_fnode_max_outstanding_r2t.attr,
888 &dev_attr_fnode_isid.attr,
889 &dev_attr_fnode_tsid.attr,
890 &dev_attr_fnode_max_burst_len.attr,
891 &dev_attr_fnode_def_taskmgmt_tmo.attr,
892 &dev_attr_fnode_targetalias.attr,
893 &dev_attr_fnode_targetname.attr,
894 &dev_attr_fnode_tpgt.attr,
895 &dev_attr_fnode_discovery_parent_idx.attr,
896 &dev_attr_fnode_discovery_parent_type.attr,
897 &dev_attr_fnode_chap_in_idx.attr,
898 &dev_attr_fnode_chap_out_idx.attr,
899 &dev_attr_fnode_username.attr,
900 &dev_attr_fnode_username_in.attr,
901 &dev_attr_fnode_password.attr,
902 &dev_attr_fnode_password_in.attr,
903 &dev_attr_fnode_is_boot_target.attr,
904 NULL,
905};
906
907static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
908 struct attribute *attr,
909 int i)
910{
911 struct device *dev = container_of(kobj, struct device, kobj);
912 struct iscsi_bus_flash_session *fnode_sess =
913 iscsi_dev_to_flash_session(dev);
914 struct iscsi_transport *t = fnode_sess->transport;
915 int param;
916
917 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
918 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
919 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
920 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
921 } else if (attr == &dev_attr_fnode_portal_type.attr) {
922 param = ISCSI_FLASHNODE_PORTAL_TYPE;
923 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
924 param = ISCSI_FLASHNODE_ENTRY_EN;
925 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
926 param = ISCSI_FLASHNODE_IMM_DATA_EN;
927 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
928 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
929 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
930 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
931 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
932 param = ISCSI_FLASHNODE_PDU_INORDER;
933 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
934 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
935 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
936 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
937 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
938 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
939 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
940 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
941 } else if (attr == &dev_attr_fnode_erl.attr) {
942 param = ISCSI_FLASHNODE_ERL;
943 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
944 param = ISCSI_FLASHNODE_FIRST_BURST;
945 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
946 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
947 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
948 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
949 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
950 param = ISCSI_FLASHNODE_MAX_R2T;
951 } else if (attr == &dev_attr_fnode_isid.attr) {
952 param = ISCSI_FLASHNODE_ISID;
953 } else if (attr == &dev_attr_fnode_tsid.attr) {
954 param = ISCSI_FLASHNODE_TSID;
955 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
956 param = ISCSI_FLASHNODE_MAX_BURST;
957 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
958 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
959 } else if (attr == &dev_attr_fnode_targetalias.attr) {
960 param = ISCSI_FLASHNODE_ALIAS;
961 } else if (attr == &dev_attr_fnode_targetname.attr) {
962 param = ISCSI_FLASHNODE_NAME;
963 } else if (attr == &dev_attr_fnode_tpgt.attr) {
964 param = ISCSI_FLASHNODE_TPGT;
965 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
966 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
967 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
968 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
969 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
970 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
971 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
972 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
973 } else if (attr == &dev_attr_fnode_username.attr) {
974 param = ISCSI_FLASHNODE_USERNAME;
975 } else if (attr == &dev_attr_fnode_username_in.attr) {
976 param = ISCSI_FLASHNODE_USERNAME_IN;
977 } else if (attr == &dev_attr_fnode_password.attr) {
978 param = ISCSI_FLASHNODE_PASSWORD;
979 } else if (attr == &dev_attr_fnode_password_in.attr) {
980 param = ISCSI_FLASHNODE_PASSWORD_IN;
981 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
982 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
983 } else {
984 WARN_ONCE(1, "Invalid flashnode session attr");
985 return 0;
986 }
987
988 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
989}
990
991static struct attribute_group iscsi_flashnode_sess_attr_group = {
992 .attrs = iscsi_flashnode_sess_attrs,
993 .is_visible = iscsi_flashnode_sess_attr_is_visible,
994};
995
996static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
997 &iscsi_flashnode_sess_attr_group,
998 NULL,
999};
1000
1001static void iscsi_flashnode_sess_release(struct device *dev)
1002{
1003 struct iscsi_bus_flash_session *fnode_sess =
1004 iscsi_dev_to_flash_session(dev);
1005
1006 kfree(fnode_sess->targetname);
1007 kfree(fnode_sess->targetalias);
1008 kfree(fnode_sess->portal_type);
1009 kfree(fnode_sess);
1010}
1011
1012static const struct device_type iscsi_flashnode_sess_dev_type = {
1013 .name = "iscsi_flashnode_sess_dev_type",
1014 .groups = iscsi_flashnode_sess_attr_groups,
1015 .release = iscsi_flashnode_sess_release,
1016};
1017
1018/* flash node connection attrs show */
1019#define iscsi_flashnode_conn_attr_show(type, name, param) \
1020static ssize_t \
1021show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1022 char *buf) \
1023{ \
1024 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1025 struct iscsi_bus_flash_session *fnode_sess = \
1026 iscsi_flash_conn_to_flash_session(fnode_conn);\
1027 struct iscsi_transport *t = fnode_conn->transport; \
1028 return t->get_flashnode_param(fnode_sess, param, buf); \
1029} \
1030
1031
1032#define iscsi_flashnode_conn_attr(type, name, param) \
1033 iscsi_flashnode_conn_attr_show(type, name, param) \
1034static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1035 show_##type##_##name, NULL);
1036
1037/* Flash node connection attributes */
1038
1039iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1040 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1041iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1042iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1043iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1044iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1045 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1046iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1047 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1048iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1049 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1050iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1051 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1052iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1053 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1054iscsi_flashnode_conn_attr(fnode, fragment_disable,
1055 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1056iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1057iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1058iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1059iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1060 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1061iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1062 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1063iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1064iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1065iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1066iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1067 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1068iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1069 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1070iscsi_flashnode_conn_attr(fnode, max_segment_size,
1071 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1072iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1073 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1074iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1075iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1076iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1077iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1078
1079static struct attribute *iscsi_flashnode_conn_attrs[] = {
1080 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1081 &dev_attr_fnode_header_digest.attr,
1082 &dev_attr_fnode_data_digest.attr,
1083 &dev_attr_fnode_snack_req.attr,
1084 &dev_attr_fnode_tcp_timestamp_stat.attr,
1085 &dev_attr_fnode_tcp_nagle_disable.attr,
1086 &dev_attr_fnode_tcp_wsf_disable.attr,
1087 &dev_attr_fnode_tcp_timer_scale.attr,
1088 &dev_attr_fnode_tcp_timestamp_enable.attr,
1089 &dev_attr_fnode_fragment_disable.attr,
1090 &dev_attr_fnode_max_recv_dlength.attr,
1091 &dev_attr_fnode_max_xmit_dlength.attr,
1092 &dev_attr_fnode_keepalive_tmo.attr,
1093 &dev_attr_fnode_port.attr,
1094 &dev_attr_fnode_ipaddress.attr,
1095 &dev_attr_fnode_redirect_ipaddr.attr,
1096 &dev_attr_fnode_max_segment_size.attr,
1097 &dev_attr_fnode_local_port.attr,
1098 &dev_attr_fnode_ipv4_tos.attr,
1099 &dev_attr_fnode_ipv6_traffic_class.attr,
1100 &dev_attr_fnode_ipv6_flow_label.attr,
1101 &dev_attr_fnode_link_local_ipv6.attr,
1102 &dev_attr_fnode_tcp_xmit_wsf.attr,
1103 &dev_attr_fnode_tcp_recv_wsf.attr,
1104 &dev_attr_fnode_statsn.attr,
1105 &dev_attr_fnode_exp_statsn.attr,
1106 NULL,
1107};
1108
1109static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1110 struct attribute *attr,
1111 int i)
1112{
1113 struct device *dev = container_of(kobj, struct device, kobj);
1114 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1115 struct iscsi_transport *t = fnode_conn->transport;
1116 int param;
1117
1118 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1119 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1120 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1121 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1122 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1123 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1124 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1125 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1126 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1127 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1128 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1129 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1130 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1131 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1132 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1133 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1134 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1135 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1136 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1137 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1138 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1139 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1140 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1141 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1142 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1143 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1144 } else if (attr == &dev_attr_fnode_port.attr) {
1145 param = ISCSI_FLASHNODE_PORT;
1146 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1147 param = ISCSI_FLASHNODE_IPADDR;
1148 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1149 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1150 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1151 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1152 } else if (attr == &dev_attr_fnode_local_port.attr) {
1153 param = ISCSI_FLASHNODE_LOCAL_PORT;
1154 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1155 param = ISCSI_FLASHNODE_IPV4_TOS;
1156 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1157 param = ISCSI_FLASHNODE_IPV6_TC;
1158 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1159 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1160 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1161 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1162 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1163 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1164 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1165 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1166 } else if (attr == &dev_attr_fnode_statsn.attr) {
1167 param = ISCSI_FLASHNODE_STATSN;
1168 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1169 param = ISCSI_FLASHNODE_EXP_STATSN;
1170 } else {
1171 WARN_ONCE(1, "Invalid flashnode connection attr");
1172 return 0;
1173 }
1174
1175 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1176}
1177
1178static struct attribute_group iscsi_flashnode_conn_attr_group = {
1179 .attrs = iscsi_flashnode_conn_attrs,
1180 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1181};
1182
1183static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1184 &iscsi_flashnode_conn_attr_group,
1185 NULL,
1186};
1187
1188static void iscsi_flashnode_conn_release(struct device *dev)
1189{
1190 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1191
1192 kfree(fnode_conn->ipaddress);
1193 kfree(fnode_conn->redirect_ipaddr);
1194 kfree(fnode_conn->link_local_ipv6_addr);
1195 kfree(fnode_conn);
1196}
1197
1198static const struct device_type iscsi_flashnode_conn_dev_type = {
1199 .name = "iscsi_flashnode_conn_dev_type",
1200 .groups = iscsi_flashnode_conn_attr_groups,
1201 .release = iscsi_flashnode_conn_release,
1202};
1203
1204static const struct bus_type iscsi_flashnode_bus;
1205
1206int iscsi_flashnode_bus_match(struct device *dev,
1207 const struct device_driver *drv)
1208{
1209 if (dev->bus == &iscsi_flashnode_bus)
1210 return 1;
1211 return 0;
1212}
1213EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1214
1215static const struct bus_type iscsi_flashnode_bus = {
1216 .name = "iscsi_flashnode",
1217 .match = &iscsi_flashnode_bus_match,
1218};
1219
1220/**
1221 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1222 * @shost: pointer to host data
1223 * @index: index of flashnode to add in sysfs
1224 * @transport: pointer to transport data
1225 * @dd_size: total size to allocate
1226 *
1227 * Adds a sysfs entry for the flashnode session attributes
1228 *
1229 * Returns:
1230 * pointer to allocated flashnode sess on success
1231 * %NULL on failure
1232 */
1233struct iscsi_bus_flash_session *
1234iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1235 struct iscsi_transport *transport,
1236 int dd_size)
1237{
1238 struct iscsi_bus_flash_session *fnode_sess;
1239 int err;
1240
1241 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1242 if (!fnode_sess)
1243 return NULL;
1244
1245 fnode_sess->transport = transport;
1246 fnode_sess->target_id = index;
1247 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1248 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1249 fnode_sess->dev.parent = &shost->shost_gendev;
1250 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1251 shost->host_no, index);
1252
1253 err = device_register(&fnode_sess->dev);
1254 if (err)
1255 goto put_dev;
1256
1257 if (dd_size)
1258 fnode_sess->dd_data = &fnode_sess[1];
1259
1260 return fnode_sess;
1261
1262put_dev:
1263 put_device(&fnode_sess->dev);
1264 return NULL;
1265}
1266EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1267
1268/**
1269 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1270 * @shost: pointer to host data
1271 * @fnode_sess: pointer to the parent flashnode session entry
1272 * @transport: pointer to transport data
1273 * @dd_size: total size to allocate
1274 *
1275 * Adds a sysfs entry for the flashnode connection attributes
1276 *
1277 * Returns:
1278 * pointer to allocated flashnode conn on success
1279 * %NULL on failure
1280 */
1281struct iscsi_bus_flash_conn *
1282iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1283 struct iscsi_bus_flash_session *fnode_sess,
1284 struct iscsi_transport *transport,
1285 int dd_size)
1286{
1287 struct iscsi_bus_flash_conn *fnode_conn;
1288 int err;
1289
1290 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1291 if (!fnode_conn)
1292 return NULL;
1293
1294 fnode_conn->transport = transport;
1295 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1296 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1297 fnode_conn->dev.parent = &fnode_sess->dev;
1298 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1299 shost->host_no, fnode_sess->target_id);
1300
1301 err = device_register(&fnode_conn->dev);
1302 if (err)
1303 goto put_dev;
1304
1305 if (dd_size)
1306 fnode_conn->dd_data = &fnode_conn[1];
1307
1308 return fnode_conn;
1309
1310put_dev:
1311 put_device(&fnode_conn->dev);
1312 return NULL;
1313}
1314EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1315
1316/**
1317 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1318 * @dev: device to verify
1319 * @data: pointer to data containing value to use for verification
1320 *
1321 * Verifies if the passed device is flashnode conn device
1322 *
1323 * Returns:
1324 * 1 on success
1325 * 0 on failure
1326 */
1327static int iscsi_is_flashnode_conn_dev(struct device *dev, const void *data)
1328{
1329 return dev->bus == &iscsi_flashnode_bus;
1330}
1331
1332static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1333{
1334 device_unregister(&fnode_conn->dev);
1335 return 0;
1336}
1337
1338static int flashnode_match_index(struct device *dev, const void *data)
1339{
1340 struct iscsi_bus_flash_session *fnode_sess = NULL;
1341 int ret = 0;
1342
1343 if (!iscsi_flashnode_bus_match(dev, NULL))
1344 goto exit_match_index;
1345
1346 fnode_sess = iscsi_dev_to_flash_session(dev);
1347 ret = (fnode_sess->target_id == *((const int *)data)) ? 1 : 0;
1348
1349exit_match_index:
1350 return ret;
1351}
1352
1353/**
1354 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1355 * @shost: pointer to host data
1356 * @idx: index to match
1357 *
1358 * Finds the flashnode session object for the passed index
1359 *
1360 * Returns:
1361 * pointer to found flashnode session object on success
1362 * %NULL on failure
1363 */
1364static struct iscsi_bus_flash_session *
1365iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1366{
1367 struct iscsi_bus_flash_session *fnode_sess = NULL;
1368 struct device *dev;
1369
1370 dev = device_find_child(&shost->shost_gendev, &idx,
1371 flashnode_match_index);
1372 if (dev)
1373 fnode_sess = iscsi_dev_to_flash_session(dev);
1374
1375 return fnode_sess;
1376}
1377
1378/**
1379 * iscsi_find_flashnode_sess - finds flashnode session entry
1380 * @shost: pointer to host data
1381 * @data: pointer to data containing value to use for comparison
1382 * @fn: function pointer that does actual comparison
1383 *
1384 * Finds the flashnode session object comparing the data passed using logic
1385 * defined in passed function pointer
1386 *
1387 * Returns:
1388 * pointer to found flashnode session device object on success
1389 * %NULL on failure
1390 */
1391struct device *
1392iscsi_find_flashnode_sess(struct Scsi_Host *shost, const void *data,
1393 device_match_t fn)
1394{
1395 return device_find_child(&shost->shost_gendev, data, fn);
1396}
1397EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1398
1399/**
1400 * iscsi_find_flashnode_conn - finds flashnode connection entry
1401 * @fnode_sess: pointer to parent flashnode session entry
1402 *
1403 * Finds the flashnode connection object comparing the data passed using logic
1404 * defined in passed function pointer
1405 *
1406 * Returns:
1407 * pointer to found flashnode connection device object on success
1408 * %NULL on failure
1409 */
1410struct device *
1411iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1412{
1413 return device_find_child(&fnode_sess->dev, NULL,
1414 iscsi_is_flashnode_conn_dev);
1415}
1416EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1417
1418static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1419{
1420 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1421 return 0;
1422
1423 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1424}
1425
1426/**
1427 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1428 * @fnode_sess: pointer to flashnode session entry to be destroyed
1429 *
1430 * Deletes the flashnode session entry and all children flashnode connection
1431 * entries from sysfs
1432 */
1433void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1434{
1435 int err;
1436
1437 err = device_for_each_child(&fnode_sess->dev, NULL,
1438 iscsi_iter_destroy_flashnode_conn_fn);
1439 if (err)
1440 pr_err("Could not delete all connections for %s. Error %d.\n",
1441 fnode_sess->dev.kobj.name, err);
1442
1443 device_unregister(&fnode_sess->dev);
1444}
1445EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1446
1447static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1448{
1449 if (!iscsi_flashnode_bus_match(dev, NULL))
1450 return 0;
1451
1452 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1453 return 0;
1454}
1455
1456/**
1457 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1458 * @shost: pointer to host data
1459 *
1460 * Destroys all the flashnode session entries and all corresponding children
1461 * flashnode connection entries from sysfs
1462 */
1463void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1464{
1465 device_for_each_child(&shost->shost_gendev, NULL,
1466 iscsi_iter_destroy_flashnode_fn);
1467}
1468EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1469
1470/*
1471 * BSG support
1472 */
1473/**
1474 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1475 * @job: bsg job to be processed
1476 */
1477static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1478{
1479 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1480 struct iscsi_bsg_request *req = job->request;
1481 struct iscsi_bsg_reply *reply = job->reply;
1482 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1483 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1484 int ret;
1485
1486 /* check if we have the msgcode value at least */
1487 if (job->request_len < sizeof(uint32_t)) {
1488 ret = -ENOMSG;
1489 goto fail_host_msg;
1490 }
1491
1492 /* Validate the host command */
1493 switch (req->msgcode) {
1494 case ISCSI_BSG_HST_VENDOR:
1495 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1496 if ((shost->hostt->vendor_id == 0L) ||
1497 (req->rqst_data.h_vendor.vendor_id !=
1498 shost->hostt->vendor_id)) {
1499 ret = -ESRCH;
1500 goto fail_host_msg;
1501 }
1502 break;
1503 default:
1504 ret = -EBADR;
1505 goto fail_host_msg;
1506 }
1507
1508 /* check if we really have all the request data needed */
1509 if (job->request_len < cmdlen) {
1510 ret = -ENOMSG;
1511 goto fail_host_msg;
1512 }
1513
1514 ret = i->iscsi_transport->bsg_request(job);
1515 if (!ret)
1516 return 0;
1517
1518fail_host_msg:
1519 /* return the errno failure code as the only status */
1520 BUG_ON(job->reply_len < sizeof(uint32_t));
1521 reply->reply_payload_rcv_len = 0;
1522 reply->result = ret;
1523 job->reply_len = sizeof(uint32_t);
1524 bsg_job_done(job, ret, 0);
1525 return 0;
1526}
1527
1528/**
1529 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1530 * @shost: shost for iscsi_host
1531 * @ihost: iscsi_cls_host adding the structures to
1532 */
1533static int
1534iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1535{
1536 struct device *dev = &shost->shost_gendev;
1537 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1538 struct queue_limits lim;
1539 struct request_queue *q;
1540 char bsg_name[20];
1541
1542 if (!i->iscsi_transport->bsg_request)
1543 return -ENOTSUPP;
1544
1545 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1546 scsi_init_limits(shost, &lim);
1547 q = bsg_setup_queue(dev, bsg_name, &lim, iscsi_bsg_host_dispatch, NULL,
1548 0, SCSI_SENSE_BUFFERSIZE);
1549 if (IS_ERR(q)) {
1550 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1551 "initialize - no request queue\n");
1552 return PTR_ERR(q);
1553 }
1554
1555 ihost->bsg_q = q;
1556 return 0;
1557}
1558
1559static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1560 struct device *cdev)
1561{
1562 struct Scsi_Host *shost = dev_to_shost(dev);
1563 struct iscsi_cls_host *ihost = shost->shost_data;
1564
1565 memset(ihost, 0, sizeof(*ihost));
1566 mutex_init(&ihost->mutex);
1567
1568 iscsi_bsg_host_add(shost, ihost);
1569 /* ignore any bsg add error - we just can't do sgio */
1570
1571 return 0;
1572}
1573
1574static int iscsi_remove_host(struct transport_container *tc,
1575 struct device *dev, struct device *cdev)
1576{
1577 struct Scsi_Host *shost = dev_to_shost(dev);
1578 struct iscsi_cls_host *ihost = shost->shost_data;
1579
1580 bsg_remove_queue(ihost->bsg_q);
1581 return 0;
1582}
1583
1584static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1585 "iscsi_host",
1586 iscsi_setup_host,
1587 iscsi_remove_host,
1588 NULL);
1589
1590static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1591 "iscsi_session",
1592 NULL,
1593 NULL,
1594 NULL);
1595
1596static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1597 "iscsi_connection",
1598 NULL,
1599 NULL,
1600 NULL);
1601
1602static struct sock *nls;
1603static DEFINE_MUTEX(rx_queue_mutex);
1604
1605static LIST_HEAD(sesslist);
1606static DEFINE_SPINLOCK(sesslock);
1607static LIST_HEAD(connlist);
1608static DEFINE_SPINLOCK(connlock);
1609
1610static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1611{
1612 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1613 return sess->sid;
1614}
1615
1616/*
1617 * Returns the matching session to a given sid
1618 */
1619static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1620{
1621 unsigned long flags;
1622 struct iscsi_cls_session *sess;
1623
1624 spin_lock_irqsave(&sesslock, flags);
1625 list_for_each_entry(sess, &sesslist, sess_list) {
1626 if (sess->sid == sid) {
1627 spin_unlock_irqrestore(&sesslock, flags);
1628 return sess;
1629 }
1630 }
1631 spin_unlock_irqrestore(&sesslock, flags);
1632 return NULL;
1633}
1634
1635/*
1636 * Returns the matching connection to a given sid / cid tuple
1637 */
1638static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1639{
1640 unsigned long flags;
1641 struct iscsi_cls_conn *conn;
1642
1643 spin_lock_irqsave(&connlock, flags);
1644 list_for_each_entry(conn, &connlist, conn_list) {
1645 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1646 spin_unlock_irqrestore(&connlock, flags);
1647 return conn;
1648 }
1649 }
1650 spin_unlock_irqrestore(&connlock, flags);
1651 return NULL;
1652}
1653
1654/*
1655 * The following functions can be used by LLDs that allocate
1656 * their own scsi_hosts or by software iscsi LLDs
1657 */
1658static struct {
1659 int value;
1660 char *name;
1661} iscsi_session_state_names[] = {
1662 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1663 { ISCSI_SESSION_FAILED, "FAILED" },
1664 { ISCSI_SESSION_FREE, "FREE" },
1665};
1666
1667static const char *iscsi_session_state_name(int state)
1668{
1669 int i;
1670 char *name = NULL;
1671
1672 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1673 if (iscsi_session_state_names[i].value == state) {
1674 name = iscsi_session_state_names[i].name;
1675 break;
1676 }
1677 }
1678 return name;
1679}
1680
1681static char *iscsi_session_target_state_name[] = {
1682 [ISCSI_SESSION_TARGET_UNBOUND] = "UNBOUND",
1683 [ISCSI_SESSION_TARGET_ALLOCATED] = "ALLOCATED",
1684 [ISCSI_SESSION_TARGET_SCANNED] = "SCANNED",
1685 [ISCSI_SESSION_TARGET_UNBINDING] = "UNBINDING",
1686};
1687
1688int iscsi_session_chkready(struct iscsi_cls_session *session)
1689{
1690 int err;
1691
1692 switch (session->state) {
1693 case ISCSI_SESSION_LOGGED_IN:
1694 err = 0;
1695 break;
1696 case ISCSI_SESSION_FAILED:
1697 err = DID_IMM_RETRY << 16;
1698 break;
1699 case ISCSI_SESSION_FREE:
1700 err = DID_TRANSPORT_FAILFAST << 16;
1701 break;
1702 default:
1703 err = DID_NO_CONNECT << 16;
1704 break;
1705 }
1706 return err;
1707}
1708EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1709
1710int iscsi_is_session_online(struct iscsi_cls_session *session)
1711{
1712 unsigned long flags;
1713 int ret = 0;
1714
1715 spin_lock_irqsave(&session->lock, flags);
1716 if (session->state == ISCSI_SESSION_LOGGED_IN)
1717 ret = 1;
1718 spin_unlock_irqrestore(&session->lock, flags);
1719 return ret;
1720}
1721EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1722
1723static void iscsi_session_release(struct device *dev)
1724{
1725 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1726 struct Scsi_Host *shost;
1727
1728 shost = iscsi_session_to_shost(session);
1729 scsi_host_put(shost);
1730 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1731 kfree(session);
1732}
1733
1734int iscsi_is_session_dev(const struct device *dev)
1735{
1736 return dev->release == iscsi_session_release;
1737}
1738EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1739
1740static int iscsi_iter_session_fn(struct device *dev, void *data)
1741{
1742 void (* fn) (struct iscsi_cls_session *) = data;
1743
1744 if (!iscsi_is_session_dev(dev))
1745 return 0;
1746 fn(iscsi_dev_to_session(dev));
1747 return 0;
1748}
1749
1750void iscsi_host_for_each_session(struct Scsi_Host *shost,
1751 void (*fn)(struct iscsi_cls_session *))
1752{
1753 device_for_each_child(&shost->shost_gendev, fn,
1754 iscsi_iter_session_fn);
1755}
1756EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1757
1758struct iscsi_scan_data {
1759 unsigned int channel;
1760 unsigned int id;
1761 u64 lun;
1762 enum scsi_scan_mode rescan;
1763};
1764
1765static int iscsi_user_scan_session(struct device *dev, void *data)
1766{
1767 struct iscsi_scan_data *scan_data = data;
1768 struct iscsi_cls_session *session;
1769 struct Scsi_Host *shost;
1770 struct iscsi_cls_host *ihost;
1771 unsigned long flags;
1772 unsigned int id;
1773
1774 if (!iscsi_is_session_dev(dev))
1775 return 0;
1776
1777 session = iscsi_dev_to_session(dev);
1778
1779 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1780
1781 shost = iscsi_session_to_shost(session);
1782 ihost = shost->shost_data;
1783
1784 mutex_lock(&ihost->mutex);
1785 spin_lock_irqsave(&session->lock, flags);
1786 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1787 spin_unlock_irqrestore(&session->lock, flags);
1788 goto user_scan_exit;
1789 }
1790 id = session->target_id;
1791 spin_unlock_irqrestore(&session->lock, flags);
1792
1793 if (id != ISCSI_MAX_TARGET) {
1794 if ((scan_data->channel == SCAN_WILD_CARD ||
1795 scan_data->channel == 0) &&
1796 (scan_data->id == SCAN_WILD_CARD ||
1797 scan_data->id == id)) {
1798 scsi_scan_target(&session->dev, 0, id,
1799 scan_data->lun, scan_data->rescan);
1800 spin_lock_irqsave(&session->lock, flags);
1801 session->target_state = ISCSI_SESSION_TARGET_SCANNED;
1802 spin_unlock_irqrestore(&session->lock, flags);
1803 }
1804 }
1805
1806user_scan_exit:
1807 mutex_unlock(&ihost->mutex);
1808 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1809 return 0;
1810}
1811
1812static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1813 uint id, u64 lun)
1814{
1815 struct iscsi_scan_data scan_data;
1816
1817 scan_data.channel = channel;
1818 scan_data.id = id;
1819 scan_data.lun = lun;
1820 scan_data.rescan = SCSI_SCAN_MANUAL;
1821
1822 return device_for_each_child(&shost->shost_gendev, &scan_data,
1823 iscsi_user_scan_session);
1824}
1825
1826static void iscsi_scan_session(struct work_struct *work)
1827{
1828 struct iscsi_cls_session *session =
1829 container_of(work, struct iscsi_cls_session, scan_work);
1830 struct iscsi_scan_data scan_data;
1831
1832 scan_data.channel = 0;
1833 scan_data.id = SCAN_WILD_CARD;
1834 scan_data.lun = SCAN_WILD_CARD;
1835 scan_data.rescan = SCSI_SCAN_RESCAN;
1836
1837 iscsi_user_scan_session(&session->dev, &scan_data);
1838}
1839
1840/**
1841 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1842 * @cmd: scsi cmd passed to scsi eh handler
1843 *
1844 * If the session is down this function will wait for the recovery
1845 * timer to fire or for the session to be logged back in. If the
1846 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1847 * should pass this error value to the scsi eh.
1848 */
1849int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1850{
1851 struct iscsi_cls_session *session =
1852 starget_to_session(scsi_target(cmd->device));
1853 unsigned long flags;
1854 int ret = 0;
1855
1856 spin_lock_irqsave(&session->lock, flags);
1857 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1858 if (session->state == ISCSI_SESSION_FREE) {
1859 ret = FAST_IO_FAIL;
1860 break;
1861 }
1862 spin_unlock_irqrestore(&session->lock, flags);
1863 msleep(1000);
1864 spin_lock_irqsave(&session->lock, flags);
1865 }
1866 spin_unlock_irqrestore(&session->lock, flags);
1867 return ret;
1868}
1869EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1870
1871static void session_recovery_timedout(struct work_struct *work)
1872{
1873 struct iscsi_cls_session *session =
1874 container_of(work, struct iscsi_cls_session,
1875 recovery_work.work);
1876 unsigned long flags;
1877
1878 iscsi_cls_session_printk(KERN_INFO, session,
1879 "session recovery timed out after %d secs\n",
1880 session->recovery_tmo);
1881
1882 spin_lock_irqsave(&session->lock, flags);
1883 switch (session->state) {
1884 case ISCSI_SESSION_FAILED:
1885 session->state = ISCSI_SESSION_FREE;
1886 break;
1887 case ISCSI_SESSION_LOGGED_IN:
1888 case ISCSI_SESSION_FREE:
1889 /* we raced with the unblock's flush */
1890 spin_unlock_irqrestore(&session->lock, flags);
1891 return;
1892 }
1893 spin_unlock_irqrestore(&session->lock, flags);
1894
1895 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1896 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1897 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1898
1899 if (session->transport->session_recovery_timedout)
1900 session->transport->session_recovery_timedout(session);
1901}
1902
1903static void __iscsi_unblock_session(struct work_struct *work)
1904{
1905 struct iscsi_cls_session *session =
1906 container_of(work, struct iscsi_cls_session,
1907 unblock_work);
1908 unsigned long flags;
1909
1910 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1911
1912 cancel_delayed_work_sync(&session->recovery_work);
1913 spin_lock_irqsave(&session->lock, flags);
1914 session->state = ISCSI_SESSION_LOGGED_IN;
1915 spin_unlock_irqrestore(&session->lock, flags);
1916 /* start IO */
1917 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1918 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1919}
1920
1921/**
1922 * iscsi_unblock_session - set a session as logged in and start IO.
1923 * @session: iscsi session
1924 *
1925 * Mark a session as ready to accept IO.
1926 */
1927void iscsi_unblock_session(struct iscsi_cls_session *session)
1928{
1929 if (!cancel_work_sync(&session->block_work))
1930 cancel_delayed_work_sync(&session->recovery_work);
1931
1932 queue_work(session->workq, &session->unblock_work);
1933 /*
1934 * Blocking the session can be done from any context so we only
1935 * queue the block work. Make sure the unblock work has completed
1936 * because it flushes/cancels the other works and updates the state.
1937 */
1938 flush_work(&session->unblock_work);
1939}
1940EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1941
1942static void __iscsi_block_session(struct work_struct *work)
1943{
1944 struct iscsi_cls_session *session =
1945 container_of(work, struct iscsi_cls_session,
1946 block_work);
1947 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1948 unsigned long flags;
1949
1950 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1951 spin_lock_irqsave(&session->lock, flags);
1952 session->state = ISCSI_SESSION_FAILED;
1953 spin_unlock_irqrestore(&session->lock, flags);
1954 scsi_block_targets(shost, &session->dev);
1955 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1956 if (session->recovery_tmo >= 0)
1957 queue_delayed_work(session->workq,
1958 &session->recovery_work,
1959 session->recovery_tmo * HZ);
1960}
1961
1962void iscsi_block_session(struct iscsi_cls_session *session)
1963{
1964 queue_work(session->workq, &session->block_work);
1965}
1966EXPORT_SYMBOL_GPL(iscsi_block_session);
1967
1968static void __iscsi_unbind_session(struct work_struct *work)
1969{
1970 struct iscsi_cls_session *session =
1971 container_of(work, struct iscsi_cls_session,
1972 unbind_work);
1973 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1974 struct iscsi_cls_host *ihost = shost->shost_data;
1975 unsigned long flags;
1976 unsigned int target_id;
1977 bool remove_target = true;
1978
1979 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
1980
1981 /* Prevent new scans and make sure scanning is not in progress */
1982 mutex_lock(&ihost->mutex);
1983 spin_lock_irqsave(&session->lock, flags);
1984 if (session->target_state == ISCSI_SESSION_TARGET_ALLOCATED) {
1985 remove_target = false;
1986 } else if (session->target_state != ISCSI_SESSION_TARGET_SCANNED) {
1987 spin_unlock_irqrestore(&session->lock, flags);
1988 mutex_unlock(&ihost->mutex);
1989 ISCSI_DBG_TRANS_SESSION(session,
1990 "Skipping target unbinding: Session is unbound/unbinding.\n");
1991 return;
1992 }
1993
1994 session->target_state = ISCSI_SESSION_TARGET_UNBINDING;
1995 target_id = session->target_id;
1996 session->target_id = ISCSI_MAX_TARGET;
1997 spin_unlock_irqrestore(&session->lock, flags);
1998 mutex_unlock(&ihost->mutex);
1999
2000 if (remove_target)
2001 scsi_remove_target(&session->dev);
2002
2003 if (session->ida_used)
2004 ida_free(&iscsi_sess_ida, target_id);
2005
2006 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2007 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2008
2009 spin_lock_irqsave(&session->lock, flags);
2010 session->target_state = ISCSI_SESSION_TARGET_UNBOUND;
2011 spin_unlock_irqrestore(&session->lock, flags);
2012}
2013
2014static void __iscsi_destroy_session(struct work_struct *work)
2015{
2016 struct iscsi_cls_session *session =
2017 container_of(work, struct iscsi_cls_session, destroy_work);
2018
2019 session->transport->destroy_session(session);
2020}
2021
2022struct iscsi_cls_session *
2023iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2024 int dd_size)
2025{
2026 struct iscsi_cls_session *session;
2027
2028 session = kzalloc(sizeof(*session) + dd_size,
2029 GFP_KERNEL);
2030 if (!session)
2031 return NULL;
2032
2033 session->transport = transport;
2034 session->creator = -1;
2035 session->recovery_tmo = 120;
2036 session->recovery_tmo_sysfs_override = false;
2037 session->state = ISCSI_SESSION_FREE;
2038 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2039 INIT_LIST_HEAD(&session->sess_list);
2040 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2041 INIT_WORK(&session->block_work, __iscsi_block_session);
2042 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2043 INIT_WORK(&session->scan_work, iscsi_scan_session);
2044 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);
2045 spin_lock_init(&session->lock);
2046
2047 /* this is released in the dev's release function */
2048 scsi_host_get(shost);
2049 session->dev.parent = &shost->shost_gendev;
2050 session->dev.release = iscsi_session_release;
2051 device_initialize(&session->dev);
2052 if (dd_size)
2053 session->dd_data = &session[1];
2054
2055 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2056 return session;
2057}
2058EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2059
2060int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2061{
2062 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2063 unsigned long flags;
2064 int id = 0;
2065 int err;
2066
2067 session->sid = atomic_add_return(1, &iscsi_session_nr);
2068
2069 session->workq = alloc_workqueue("iscsi_ctrl_%d:%d",
2070 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0,
2071 shost->host_no, session->sid);
2072 if (!session->workq)
2073 return -ENOMEM;
2074
2075 if (target_id == ISCSI_MAX_TARGET) {
2076 id = ida_alloc(&iscsi_sess_ida, GFP_KERNEL);
2077
2078 if (id < 0) {
2079 iscsi_cls_session_printk(KERN_ERR, session,
2080 "Failure in Target ID Allocation\n");
2081 err = id;
2082 goto destroy_wq;
2083 }
2084 session->target_id = (unsigned int)id;
2085 session->ida_used = true;
2086 } else
2087 session->target_id = target_id;
2088 spin_lock_irqsave(&session->lock, flags);
2089 session->target_state = ISCSI_SESSION_TARGET_ALLOCATED;
2090 spin_unlock_irqrestore(&session->lock, flags);
2091
2092 dev_set_name(&session->dev, "session%u", session->sid);
2093 err = device_add(&session->dev);
2094 if (err) {
2095 iscsi_cls_session_printk(KERN_ERR, session,
2096 "could not register session's dev\n");
2097 goto release_ida;
2098 }
2099 err = transport_register_device(&session->dev);
2100 if (err) {
2101 iscsi_cls_session_printk(KERN_ERR, session,
2102 "could not register transport's dev\n");
2103 goto release_dev;
2104 }
2105
2106 spin_lock_irqsave(&sesslock, flags);
2107 list_add(&session->sess_list, &sesslist);
2108 spin_unlock_irqrestore(&sesslock, flags);
2109
2110 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2111 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2112 return 0;
2113
2114release_dev:
2115 device_del(&session->dev);
2116release_ida:
2117 if (session->ida_used)
2118 ida_free(&iscsi_sess_ida, session->target_id);
2119destroy_wq:
2120 destroy_workqueue(session->workq);
2121 return err;
2122}
2123EXPORT_SYMBOL_GPL(iscsi_add_session);
2124
2125static void iscsi_conn_release(struct device *dev)
2126{
2127 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2128 struct device *parent = conn->dev.parent;
2129
2130 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2131 kfree(conn);
2132 put_device(parent);
2133}
2134
2135static int iscsi_is_conn_dev(const struct device *dev)
2136{
2137 return dev->release == iscsi_conn_release;
2138}
2139
2140static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2141{
2142 if (!iscsi_is_conn_dev(dev))
2143 return 0;
2144
2145 iscsi_remove_conn(iscsi_dev_to_conn(dev));
2146 iscsi_put_conn(iscsi_dev_to_conn(dev));
2147
2148 return 0;
2149}
2150
2151void iscsi_remove_session(struct iscsi_cls_session *session)
2152{
2153 unsigned long flags;
2154 int err;
2155
2156 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2157
2158 spin_lock_irqsave(&sesslock, flags);
2159 if (!list_empty(&session->sess_list))
2160 list_del(&session->sess_list);
2161 spin_unlock_irqrestore(&sesslock, flags);
2162
2163 if (!cancel_work_sync(&session->block_work))
2164 cancel_delayed_work_sync(&session->recovery_work);
2165 cancel_work_sync(&session->unblock_work);
2166 /*
2167 * If we are blocked let commands flow again. The lld or iscsi
2168 * layer should set up the queuecommand to fail commands.
2169 * We assume that LLD will not be calling block/unblock while
2170 * removing the session.
2171 */
2172 spin_lock_irqsave(&session->lock, flags);
2173 session->state = ISCSI_SESSION_FREE;
2174 spin_unlock_irqrestore(&session->lock, flags);
2175
2176 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2177 /*
2178 * qla4xxx can perform it's own scans when it runs in kernel only
2179 * mode. Make sure to flush those scans.
2180 */
2181 flush_work(&session->scan_work);
2182 /* flush running unbind operations */
2183 flush_work(&session->unbind_work);
2184 __iscsi_unbind_session(&session->unbind_work);
2185
2186 /* hw iscsi may not have removed all connections from session */
2187 err = device_for_each_child(&session->dev, NULL,
2188 iscsi_iter_destroy_conn_fn);
2189 if (err)
2190 iscsi_cls_session_printk(KERN_ERR, session,
2191 "Could not delete all connections "
2192 "for session. Error %d.\n", err);
2193
2194 transport_unregister_device(&session->dev);
2195
2196 destroy_workqueue(session->workq);
2197
2198 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2199 device_del(&session->dev);
2200}
2201EXPORT_SYMBOL_GPL(iscsi_remove_session);
2202
2203static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag)
2204{
2205 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n");
2206
2207 switch (flag) {
2208 case STOP_CONN_RECOVER:
2209 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED);
2210 break;
2211 case STOP_CONN_TERM:
2212 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN);
2213 break;
2214 default:
2215 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n",
2216 flag);
2217 return;
2218 }
2219
2220 conn->transport->stop_conn(conn, flag);
2221 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n");
2222}
2223
2224static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active)
2225{
2226 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2227 struct iscsi_endpoint *ep;
2228
2229 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n");
2230 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED);
2231
2232 if (!conn->ep || !session->transport->ep_disconnect)
2233 return;
2234
2235 ep = conn->ep;
2236 conn->ep = NULL;
2237
2238 session->transport->unbind_conn(conn, is_active);
2239 session->transport->ep_disconnect(ep);
2240 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n");
2241}
2242
2243static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn,
2244 struct iscsi_endpoint *ep,
2245 bool is_active)
2246{
2247 /* Check if this was a conn error and the kernel took ownership */
2248 spin_lock_irq(&conn->lock);
2249 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
2250 spin_unlock_irq(&conn->lock);
2251 iscsi_ep_disconnect(conn, is_active);
2252 } else {
2253 spin_unlock_irq(&conn->lock);
2254 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n");
2255 mutex_unlock(&conn->ep_mutex);
2256
2257 flush_work(&conn->cleanup_work);
2258 /*
2259 * Userspace is now done with the EP so we can release the ref
2260 * iscsi_cleanup_conn_work_fn took.
2261 */
2262 iscsi_put_endpoint(ep);
2263 mutex_lock(&conn->ep_mutex);
2264 }
2265}
2266
2267static int iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag)
2268{
2269 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n");
2270 /*
2271 * For offload, iscsid may not know about the ep like when iscsid is
2272 * restarted or for kernel based session shutdown iscsid is not even
2273 * up. For these cases, we do the disconnect now.
2274 */
2275 mutex_lock(&conn->ep_mutex);
2276 if (conn->ep)
2277 iscsi_if_disconnect_bound_ep(conn, conn->ep, true);
2278 mutex_unlock(&conn->ep_mutex);
2279
2280 /*
2281 * If this is a termination we have to call stop_conn with that flag
2282 * so the correct states get set. If we haven't run the work yet try to
2283 * avoid the extra run.
2284 */
2285 if (flag == STOP_CONN_TERM) {
2286 cancel_work_sync(&conn->cleanup_work);
2287 iscsi_stop_conn(conn, flag);
2288 } else {
2289 /*
2290 * Figure out if it was the kernel or userspace initiating this.
2291 */
2292 spin_lock_irq(&conn->lock);
2293 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
2294 spin_unlock_irq(&conn->lock);
2295 iscsi_stop_conn(conn, flag);
2296 } else {
2297 spin_unlock_irq(&conn->lock);
2298 ISCSI_DBG_TRANS_CONN(conn,
2299 "flush kernel conn cleanup.\n");
2300 flush_work(&conn->cleanup_work);
2301 }
2302 /*
2303 * Only clear for recovery to avoid extra cleanup runs during
2304 * termination.
2305 */
2306 spin_lock_irq(&conn->lock);
2307 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags);
2308 spin_unlock_irq(&conn->lock);
2309 }
2310 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n");
2311 return 0;
2312}
2313
2314static void iscsi_cleanup_conn_work_fn(struct work_struct *work)
2315{
2316 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn,
2317 cleanup_work);
2318 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2319
2320 mutex_lock(&conn->ep_mutex);
2321 /*
2322 * Get a ref to the ep, so we don't release its ID until after
2323 * userspace is done referencing it in iscsi_if_disconnect_bound_ep.
2324 */
2325 if (conn->ep)
2326 get_device(&conn->ep->dev);
2327 iscsi_ep_disconnect(conn, false);
2328
2329 if (system_state != SYSTEM_RUNNING) {
2330 /*
2331 * If the user has set up for the session to never timeout
2332 * then hang like they wanted. For all other cases fail right
2333 * away since userspace is not going to relogin.
2334 */
2335 if (session->recovery_tmo > 0)
2336 session->recovery_tmo = 0;
2337 }
2338
2339 iscsi_stop_conn(conn, STOP_CONN_RECOVER);
2340 mutex_unlock(&conn->ep_mutex);
2341 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n");
2342}
2343
2344static int iscsi_iter_force_destroy_conn_fn(struct device *dev, void *data)
2345{
2346 struct iscsi_transport *transport;
2347 struct iscsi_cls_conn *conn;
2348
2349 if (!iscsi_is_conn_dev(dev))
2350 return 0;
2351
2352 conn = iscsi_dev_to_conn(dev);
2353 transport = conn->transport;
2354
2355 if (READ_ONCE(conn->state) != ISCSI_CONN_DOWN)
2356 iscsi_if_stop_conn(conn, STOP_CONN_TERM);
2357
2358 transport->destroy_conn(conn);
2359 return 0;
2360}
2361
2362/**
2363 * iscsi_force_destroy_session - destroy a session from the kernel
2364 * @session: session to destroy
2365 *
2366 * Force the destruction of a session from the kernel. This should only be
2367 * used when userspace is no longer running during system shutdown.
2368 */
2369void iscsi_force_destroy_session(struct iscsi_cls_session *session)
2370{
2371 struct iscsi_transport *transport = session->transport;
2372 unsigned long flags;
2373
2374 WARN_ON_ONCE(system_state == SYSTEM_RUNNING);
2375
2376 spin_lock_irqsave(&sesslock, flags);
2377 if (list_empty(&session->sess_list)) {
2378 spin_unlock_irqrestore(&sesslock, flags);
2379 /*
2380 * Conn/ep is already freed. Session is being torn down via
2381 * async path. For shutdown we don't care about it so return.
2382 */
2383 return;
2384 }
2385 spin_unlock_irqrestore(&sesslock, flags);
2386
2387 device_for_each_child(&session->dev, NULL,
2388 iscsi_iter_force_destroy_conn_fn);
2389 transport->destroy_session(session);
2390}
2391EXPORT_SYMBOL_GPL(iscsi_force_destroy_session);
2392
2393void iscsi_free_session(struct iscsi_cls_session *session)
2394{
2395 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2396 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2397 put_device(&session->dev);
2398}
2399EXPORT_SYMBOL_GPL(iscsi_free_session);
2400
2401/**
2402 * iscsi_alloc_conn - alloc iscsi class connection
2403 * @session: iscsi cls session
2404 * @dd_size: private driver data size
2405 * @cid: connection id
2406 */
2407struct iscsi_cls_conn *
2408iscsi_alloc_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2409{
2410 struct iscsi_transport *transport = session->transport;
2411 struct iscsi_cls_conn *conn;
2412
2413 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2414 if (!conn)
2415 return NULL;
2416 if (dd_size)
2417 conn->dd_data = &conn[1];
2418
2419 mutex_init(&conn->ep_mutex);
2420 spin_lock_init(&conn->lock);
2421 INIT_LIST_HEAD(&conn->conn_list);
2422 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn);
2423 conn->transport = transport;
2424 conn->cid = cid;
2425 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN);
2426
2427 /* this is released in the dev's release function */
2428 if (!get_device(&session->dev))
2429 goto free_conn;
2430
2431 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2432 device_initialize(&conn->dev);
2433 conn->dev.parent = &session->dev;
2434 conn->dev.release = iscsi_conn_release;
2435
2436 return conn;
2437
2438free_conn:
2439 kfree(conn);
2440 return NULL;
2441}
2442EXPORT_SYMBOL_GPL(iscsi_alloc_conn);
2443
2444/**
2445 * iscsi_add_conn - add iscsi class connection
2446 * @conn: iscsi cls connection
2447 *
2448 * This will expose iscsi_cls_conn to sysfs so make sure the related
2449 * resources for sysfs attributes are initialized before calling this.
2450 */
2451int iscsi_add_conn(struct iscsi_cls_conn *conn)
2452{
2453 int err;
2454 unsigned long flags;
2455 struct iscsi_cls_session *session = iscsi_dev_to_session(conn->dev.parent);
2456
2457 err = device_add(&conn->dev);
2458 if (err) {
2459 iscsi_cls_session_printk(KERN_ERR, session,
2460 "could not register connection's dev\n");
2461 return err;
2462 }
2463 err = transport_register_device(&conn->dev);
2464 if (err) {
2465 iscsi_cls_session_printk(KERN_ERR, session,
2466 "could not register transport's dev\n");
2467 device_del(&conn->dev);
2468 return err;
2469 }
2470
2471 spin_lock_irqsave(&connlock, flags);
2472 list_add(&conn->conn_list, &connlist);
2473 spin_unlock_irqrestore(&connlock, flags);
2474
2475 return 0;
2476}
2477EXPORT_SYMBOL_GPL(iscsi_add_conn);
2478
2479/**
2480 * iscsi_remove_conn - remove iscsi class connection from sysfs
2481 * @conn: iscsi cls connection
2482 *
2483 * Remove iscsi_cls_conn from sysfs, and wait for previous
2484 * read/write of iscsi_cls_conn's attributes in sysfs to finish.
2485 */
2486void iscsi_remove_conn(struct iscsi_cls_conn *conn)
2487{
2488 unsigned long flags;
2489
2490 spin_lock_irqsave(&connlock, flags);
2491 list_del(&conn->conn_list);
2492 spin_unlock_irqrestore(&connlock, flags);
2493
2494 transport_unregister_device(&conn->dev);
2495 device_del(&conn->dev);
2496}
2497EXPORT_SYMBOL_GPL(iscsi_remove_conn);
2498
2499void iscsi_put_conn(struct iscsi_cls_conn *conn)
2500{
2501 put_device(&conn->dev);
2502}
2503EXPORT_SYMBOL_GPL(iscsi_put_conn);
2504
2505void iscsi_get_conn(struct iscsi_cls_conn *conn)
2506{
2507 get_device(&conn->dev);
2508}
2509EXPORT_SYMBOL_GPL(iscsi_get_conn);
2510
2511/*
2512 * iscsi interface functions
2513 */
2514static struct iscsi_internal *
2515iscsi_if_transport_lookup(struct iscsi_transport *tt)
2516{
2517 struct iscsi_internal *priv;
2518 unsigned long flags;
2519
2520 spin_lock_irqsave(&iscsi_transport_lock, flags);
2521 list_for_each_entry(priv, &iscsi_transports, list) {
2522 if (tt == priv->iscsi_transport) {
2523 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2524 return priv;
2525 }
2526 }
2527 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2528 return NULL;
2529}
2530
2531static int
2532iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2533{
2534 return nlmsg_multicast(nls, skb, 0, group, gfp);
2535}
2536
2537static int
2538iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2539{
2540 return nlmsg_unicast(nls, skb, portid);
2541}
2542
2543int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2544 char *data, uint32_t data_size)
2545{
2546 struct nlmsghdr *nlh;
2547 struct sk_buff *skb;
2548 struct iscsi_uevent *ev;
2549 char *pdu;
2550 struct iscsi_internal *priv;
2551 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2552 data_size);
2553
2554 priv = iscsi_if_transport_lookup(conn->transport);
2555 if (!priv)
2556 return -EINVAL;
2557
2558 skb = alloc_skb(len, GFP_ATOMIC);
2559 if (!skb) {
2560 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2561 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2562 "control PDU: OOM\n");
2563 return -ENOMEM;
2564 }
2565
2566 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2567 ev = nlmsg_data(nlh);
2568 memset(ev, 0, sizeof(*ev));
2569 ev->transport_handle = iscsi_handle(conn->transport);
2570 ev->type = ISCSI_KEVENT_RECV_PDU;
2571 ev->r.recv_req.cid = conn->cid;
2572 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2573 pdu = (char*)ev + sizeof(*ev);
2574 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2575 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2576
2577 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2578}
2579EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2580
2581int iscsi_offload_mesg(struct Scsi_Host *shost,
2582 struct iscsi_transport *transport, uint32_t type,
2583 char *data, uint16_t data_size)
2584{
2585 struct nlmsghdr *nlh;
2586 struct sk_buff *skb;
2587 struct iscsi_uevent *ev;
2588 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2589
2590 skb = alloc_skb(len, GFP_ATOMIC);
2591 if (!skb) {
2592 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2593 return -ENOMEM;
2594 }
2595
2596 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2597 ev = nlmsg_data(nlh);
2598 memset(ev, 0, sizeof(*ev));
2599 ev->type = type;
2600 ev->transport_handle = iscsi_handle(transport);
2601 switch (type) {
2602 case ISCSI_KEVENT_PATH_REQ:
2603 ev->r.req_path.host_no = shost->host_no;
2604 break;
2605 case ISCSI_KEVENT_IF_DOWN:
2606 ev->r.notify_if_down.host_no = shost->host_no;
2607 break;
2608 }
2609
2610 memcpy((char *)ev + sizeof(*ev), data, data_size);
2611
2612 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2613}
2614EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2615
2616void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2617{
2618 struct nlmsghdr *nlh;
2619 struct sk_buff *skb;
2620 struct iscsi_uevent *ev;
2621 struct iscsi_internal *priv;
2622 int len = nlmsg_total_size(sizeof(*ev));
2623 unsigned long flags;
2624 int state;
2625
2626 spin_lock_irqsave(&conn->lock, flags);
2627 /*
2628 * Userspace will only do a stop call if we are at least bound. And, we
2629 * only need to do the in kernel cleanup if in the UP state so cmds can
2630 * be released to upper layers. If in other states just wait for
2631 * userspace to avoid races that can leave the cleanup_work queued.
2632 */
2633 state = READ_ONCE(conn->state);
2634 switch (state) {
2635 case ISCSI_CONN_BOUND:
2636 case ISCSI_CONN_UP:
2637 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP,
2638 &conn->flags)) {
2639 queue_work(iscsi_conn_cleanup_workq,
2640 &conn->cleanup_work);
2641 }
2642 break;
2643 default:
2644 ISCSI_DBG_TRANS_CONN(conn, "Got conn error in state %d\n",
2645 state);
2646 break;
2647 }
2648 spin_unlock_irqrestore(&conn->lock, flags);
2649
2650 priv = iscsi_if_transport_lookup(conn->transport);
2651 if (!priv)
2652 return;
2653
2654 skb = alloc_skb(len, GFP_ATOMIC);
2655 if (!skb) {
2656 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2657 "conn error (%d)\n", error);
2658 return;
2659 }
2660
2661 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2662 ev = nlmsg_data(nlh);
2663 ev->transport_handle = iscsi_handle(conn->transport);
2664 ev->type = ISCSI_KEVENT_CONN_ERROR;
2665 ev->r.connerror.error = error;
2666 ev->r.connerror.cid = conn->cid;
2667 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2668
2669 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2670
2671 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2672 error);
2673}
2674EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2675
2676void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2677 enum iscsi_conn_state state)
2678{
2679 struct nlmsghdr *nlh;
2680 struct sk_buff *skb;
2681 struct iscsi_uevent *ev;
2682 struct iscsi_internal *priv;
2683 int len = nlmsg_total_size(sizeof(*ev));
2684
2685 priv = iscsi_if_transport_lookup(conn->transport);
2686 if (!priv)
2687 return;
2688
2689 skb = alloc_skb(len, GFP_ATOMIC);
2690 if (!skb) {
2691 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2692 "conn login (%d)\n", state);
2693 return;
2694 }
2695
2696 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2697 ev = nlmsg_data(nlh);
2698 ev->transport_handle = iscsi_handle(conn->transport);
2699 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2700 ev->r.conn_login.state = state;
2701 ev->r.conn_login.cid = conn->cid;
2702 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2703 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2704
2705 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2706 state);
2707}
2708EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2709
2710void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2711 enum iscsi_host_event_code code, uint32_t data_size,
2712 uint8_t *data)
2713{
2714 struct nlmsghdr *nlh;
2715 struct sk_buff *skb;
2716 struct iscsi_uevent *ev;
2717 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2718
2719 skb = alloc_skb(len, GFP_NOIO);
2720 if (!skb) {
2721 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2722 host_no, code);
2723 return;
2724 }
2725
2726 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2727 ev = nlmsg_data(nlh);
2728 ev->transport_handle = iscsi_handle(transport);
2729 ev->type = ISCSI_KEVENT_HOST_EVENT;
2730 ev->r.host_event.host_no = host_no;
2731 ev->r.host_event.code = code;
2732 ev->r.host_event.data_size = data_size;
2733
2734 if (data_size)
2735 memcpy((char *)ev + sizeof(*ev), data, data_size);
2736
2737 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2738}
2739EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2740
2741void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2742 uint32_t status, uint32_t pid, uint32_t data_size,
2743 uint8_t *data)
2744{
2745 struct nlmsghdr *nlh;
2746 struct sk_buff *skb;
2747 struct iscsi_uevent *ev;
2748 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2749
2750 skb = alloc_skb(len, GFP_NOIO);
2751 if (!skb) {
2752 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2753 return;
2754 }
2755
2756 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2757 ev = nlmsg_data(nlh);
2758 ev->transport_handle = iscsi_handle(transport);
2759 ev->type = ISCSI_KEVENT_PING_COMP;
2760 ev->r.ping_comp.host_no = host_no;
2761 ev->r.ping_comp.status = status;
2762 ev->r.ping_comp.pid = pid;
2763 ev->r.ping_comp.data_size = data_size;
2764 memcpy((char *)ev + sizeof(*ev), data, data_size);
2765
2766 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2767}
2768EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2769
2770static int
2771iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2772{
2773 struct sk_buff *skb;
2774 struct nlmsghdr *nlh;
2775 int len = nlmsg_total_size(size);
2776
2777 skb = alloc_skb(len, GFP_ATOMIC);
2778 if (!skb) {
2779 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2780 return -ENOMEM;
2781 }
2782
2783 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2784 memcpy(nlmsg_data(nlh), payload, size);
2785 return iscsi_unicast_skb(skb, portid);
2786}
2787
2788static int
2789iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2790{
2791 struct iscsi_uevent *ev = nlmsg_data(nlh);
2792 struct iscsi_stats *stats;
2793 struct sk_buff *skbstat;
2794 struct iscsi_cls_conn *conn;
2795 struct nlmsghdr *nlhstat;
2796 struct iscsi_uevent *evstat;
2797 struct iscsi_internal *priv;
2798 int len = nlmsg_total_size(sizeof(*ev) +
2799 sizeof(struct iscsi_stats) +
2800 sizeof(struct iscsi_stats_custom) *
2801 ISCSI_STATS_CUSTOM_MAX);
2802 int err = 0;
2803
2804 priv = iscsi_if_transport_lookup(transport);
2805 if (!priv)
2806 return -EINVAL;
2807
2808 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2809 if (!conn)
2810 return -EEXIST;
2811
2812 do {
2813 int actual_size;
2814
2815 skbstat = alloc_skb(len, GFP_ATOMIC);
2816 if (!skbstat) {
2817 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2818 "deliver stats: OOM\n");
2819 return -ENOMEM;
2820 }
2821
2822 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2823 (len - sizeof(*nlhstat)), 0);
2824 evstat = nlmsg_data(nlhstat);
2825 memset(evstat, 0, sizeof(*evstat));
2826 evstat->transport_handle = iscsi_handle(conn->transport);
2827 evstat->type = nlh->nlmsg_type;
2828 evstat->u.get_stats.cid =
2829 ev->u.get_stats.cid;
2830 evstat->u.get_stats.sid =
2831 ev->u.get_stats.sid;
2832 stats = (struct iscsi_stats *)
2833 ((char*)evstat + sizeof(*evstat));
2834 memset(stats, 0, sizeof(*stats));
2835
2836 transport->get_stats(conn, stats);
2837 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2838 sizeof(struct iscsi_stats) +
2839 sizeof(struct iscsi_stats_custom) *
2840 stats->custom_length);
2841 actual_size -= sizeof(*nlhstat);
2842 actual_size = nlmsg_msg_size(actual_size);
2843 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2844 nlhstat->nlmsg_len = actual_size;
2845
2846 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2847 GFP_ATOMIC);
2848 } while (err < 0 && err != -ECONNREFUSED);
2849
2850 return err;
2851}
2852
2853/**
2854 * iscsi_session_event - send session destr. completion event
2855 * @session: iscsi class session
2856 * @event: type of event
2857 */
2858int iscsi_session_event(struct iscsi_cls_session *session,
2859 enum iscsi_uevent_e event)
2860{
2861 struct iscsi_internal *priv;
2862 struct Scsi_Host *shost;
2863 struct iscsi_uevent *ev;
2864 struct sk_buff *skb;
2865 struct nlmsghdr *nlh;
2866 int rc, len = nlmsg_total_size(sizeof(*ev));
2867
2868 priv = iscsi_if_transport_lookup(session->transport);
2869 if (!priv)
2870 return -EINVAL;
2871 shost = iscsi_session_to_shost(session);
2872
2873 skb = alloc_skb(len, GFP_KERNEL);
2874 if (!skb) {
2875 iscsi_cls_session_printk(KERN_ERR, session,
2876 "Cannot notify userspace of session "
2877 "event %u\n", event);
2878 return -ENOMEM;
2879 }
2880
2881 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2882 ev = nlmsg_data(nlh);
2883 ev->transport_handle = iscsi_handle(session->transport);
2884
2885 ev->type = event;
2886 switch (event) {
2887 case ISCSI_KEVENT_DESTROY_SESSION:
2888 ev->r.d_session.host_no = shost->host_no;
2889 ev->r.d_session.sid = session->sid;
2890 break;
2891 case ISCSI_KEVENT_CREATE_SESSION:
2892 ev->r.c_session_ret.host_no = shost->host_no;
2893 ev->r.c_session_ret.sid = session->sid;
2894 break;
2895 case ISCSI_KEVENT_UNBIND_SESSION:
2896 ev->r.unbind_session.host_no = shost->host_no;
2897 ev->r.unbind_session.sid = session->sid;
2898 break;
2899 default:
2900 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2901 "%u.\n", event);
2902 kfree_skb(skb);
2903 return -EINVAL;
2904 }
2905
2906 /*
2907 * this will occur if the daemon is not up, so we just warn
2908 * the user and when the daemon is restarted it will handle it
2909 */
2910 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2911 if (rc == -ESRCH)
2912 iscsi_cls_session_printk(KERN_ERR, session,
2913 "Cannot notify userspace of session "
2914 "event %u. Check iscsi daemon\n",
2915 event);
2916
2917 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2918 event, rc);
2919 return rc;
2920}
2921EXPORT_SYMBOL_GPL(iscsi_session_event);
2922
2923static int
2924iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2925 struct iscsi_uevent *ev, pid_t pid,
2926 uint32_t initial_cmdsn, uint16_t cmds_max,
2927 uint16_t queue_depth)
2928{
2929 struct iscsi_transport *transport = priv->iscsi_transport;
2930 struct iscsi_cls_session *session;
2931 struct Scsi_Host *shost;
2932
2933 session = transport->create_session(ep, cmds_max, queue_depth,
2934 initial_cmdsn);
2935 if (!session)
2936 return -ENOMEM;
2937
2938 session->creator = pid;
2939 shost = iscsi_session_to_shost(session);
2940 ev->r.c_session_ret.host_no = shost->host_no;
2941 ev->r.c_session_ret.sid = session->sid;
2942 ISCSI_DBG_TRANS_SESSION(session,
2943 "Completed creating transport session\n");
2944 return 0;
2945}
2946
2947static int
2948iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2949{
2950 struct iscsi_cls_conn *conn;
2951 struct iscsi_cls_session *session;
2952
2953 session = iscsi_session_lookup(ev->u.c_conn.sid);
2954 if (!session) {
2955 printk(KERN_ERR "iscsi: invalid session %d.\n",
2956 ev->u.c_conn.sid);
2957 return -EINVAL;
2958 }
2959
2960 conn = transport->create_conn(session, ev->u.c_conn.cid);
2961 if (!conn) {
2962 iscsi_cls_session_printk(KERN_ERR, session,
2963 "couldn't create a new connection.");
2964 return -ENOMEM;
2965 }
2966
2967 ev->r.c_conn_ret.sid = session->sid;
2968 ev->r.c_conn_ret.cid = conn->cid;
2969
2970 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2971 return 0;
2972}
2973
2974static int
2975iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2976{
2977 struct iscsi_cls_conn *conn;
2978
2979 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2980 if (!conn)
2981 return -EINVAL;
2982
2983 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n");
2984 flush_work(&conn->cleanup_work);
2985 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2986
2987 if (transport->destroy_conn)
2988 transport->destroy_conn(conn);
2989 return 0;
2990}
2991
2992static int
2993iscsi_if_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen)
2994{
2995 char *data = (char*)ev + sizeof(*ev);
2996 struct iscsi_cls_conn *conn;
2997 struct iscsi_cls_session *session;
2998 int err = 0, value = 0, state;
2999
3000 if (ev->u.set_param.len > rlen ||
3001 ev->u.set_param.len > PAGE_SIZE)
3002 return -EINVAL;
3003
3004 session = iscsi_session_lookup(ev->u.set_param.sid);
3005 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
3006 if (!conn || !session)
3007 return -EINVAL;
3008
3009 /* data will be regarded as NULL-ended string, do length check */
3010 if (strlen(data) > ev->u.set_param.len)
3011 return -EINVAL;
3012
3013 switch (ev->u.set_param.param) {
3014 case ISCSI_PARAM_SESS_RECOVERY_TMO:
3015 sscanf(data, "%d", &value);
3016 if (!session->recovery_tmo_sysfs_override)
3017 session->recovery_tmo = value;
3018 break;
3019 default:
3020 state = READ_ONCE(conn->state);
3021 if (state == ISCSI_CONN_BOUND || state == ISCSI_CONN_UP) {
3022 err = transport->set_param(conn, ev->u.set_param.param,
3023 data, ev->u.set_param.len);
3024 } else {
3025 return -ENOTCONN;
3026 }
3027 }
3028
3029 return err;
3030}
3031
3032static int iscsi_if_ep_connect(struct iscsi_transport *transport,
3033 struct iscsi_uevent *ev, int msg_type)
3034{
3035 struct iscsi_endpoint *ep;
3036 struct sockaddr *dst_addr;
3037 struct Scsi_Host *shost = NULL;
3038 int non_blocking, err = 0;
3039
3040 if (!transport->ep_connect)
3041 return -EINVAL;
3042
3043 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
3044 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
3045 if (!shost) {
3046 printk(KERN_ERR "ep connect failed. Could not find "
3047 "host no %u\n",
3048 ev->u.ep_connect_through_host.host_no);
3049 return -ENODEV;
3050 }
3051 non_blocking = ev->u.ep_connect_through_host.non_blocking;
3052 } else
3053 non_blocking = ev->u.ep_connect.non_blocking;
3054
3055 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3056 ep = transport->ep_connect(shost, dst_addr, non_blocking);
3057 if (IS_ERR(ep)) {
3058 err = PTR_ERR(ep);
3059 goto release_host;
3060 }
3061
3062 ev->r.ep_connect_ret.handle = ep->id;
3063release_host:
3064 if (shost)
3065 scsi_host_put(shost);
3066 return err;
3067}
3068
3069static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
3070 u64 ep_handle)
3071{
3072 struct iscsi_cls_conn *conn;
3073 struct iscsi_endpoint *ep;
3074
3075 if (!transport->ep_disconnect)
3076 return -EINVAL;
3077
3078 ep = iscsi_lookup_endpoint(ep_handle);
3079 if (!ep)
3080 return -EINVAL;
3081
3082 conn = ep->conn;
3083 if (!conn) {
3084 /*
3085 * conn was not even bound yet, so we can't get iscsi conn
3086 * failures yet.
3087 */
3088 transport->ep_disconnect(ep);
3089 goto put_ep;
3090 }
3091
3092 mutex_lock(&conn->ep_mutex);
3093 iscsi_if_disconnect_bound_ep(conn, ep, false);
3094 mutex_unlock(&conn->ep_mutex);
3095put_ep:
3096 iscsi_put_endpoint(ep);
3097 return 0;
3098}
3099
3100static int
3101iscsi_if_transport_ep(struct iscsi_transport *transport,
3102 struct iscsi_uevent *ev, int msg_type, u32 rlen)
3103{
3104 struct iscsi_endpoint *ep;
3105 int rc = 0;
3106
3107 switch (msg_type) {
3108 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3109 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3110 if (rlen < sizeof(struct sockaddr))
3111 rc = -EINVAL;
3112 else
3113 rc = iscsi_if_ep_connect(transport, ev, msg_type);
3114 break;
3115 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3116 if (!transport->ep_poll)
3117 return -EINVAL;
3118
3119 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
3120 if (!ep)
3121 return -EINVAL;
3122
3123 ev->r.retcode = transport->ep_poll(ep,
3124 ev->u.ep_poll.timeout_ms);
3125 iscsi_put_endpoint(ep);
3126 break;
3127 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3128 rc = iscsi_if_ep_disconnect(transport,
3129 ev->u.ep_disconnect.ep_handle);
3130 break;
3131 }
3132 return rc;
3133}
3134
3135static int
3136iscsi_tgt_dscvr(struct iscsi_transport *transport,
3137 struct iscsi_uevent *ev, u32 rlen)
3138{
3139 struct Scsi_Host *shost;
3140 struct sockaddr *dst_addr;
3141 int err;
3142
3143 if (rlen < sizeof(*dst_addr))
3144 return -EINVAL;
3145
3146 if (!transport->tgt_dscvr)
3147 return -EINVAL;
3148
3149 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3150 if (!shost) {
3151 printk(KERN_ERR "target discovery could not find host no %u\n",
3152 ev->u.tgt_dscvr.host_no);
3153 return -ENODEV;
3154 }
3155
3156
3157 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3158 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3159 ev->u.tgt_dscvr.enable, dst_addr);
3160 scsi_host_put(shost);
3161 return err;
3162}
3163
3164static int
3165iscsi_set_host_param(struct iscsi_transport *transport,
3166 struct iscsi_uevent *ev, u32 rlen)
3167{
3168 char *data = (char*)ev + sizeof(*ev);
3169 struct Scsi_Host *shost;
3170 int err;
3171
3172 if (!transport->set_host_param)
3173 return -ENOSYS;
3174
3175 if (ev->u.set_host_param.len > rlen ||
3176 ev->u.set_host_param.len > PAGE_SIZE)
3177 return -EINVAL;
3178
3179 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3180 if (!shost) {
3181 printk(KERN_ERR "set_host_param could not find host no %u\n",
3182 ev->u.set_host_param.host_no);
3183 return -ENODEV;
3184 }
3185
3186 /* see similar check in iscsi_if_set_param() */
3187 if (strlen(data) > ev->u.set_host_param.len) {
3188 err = -EINVAL;
3189 goto out;
3190 }
3191
3192 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3193 data, ev->u.set_host_param.len);
3194out:
3195 scsi_host_put(shost);
3196 return err;
3197}
3198
3199static int
3200iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen)
3201{
3202 struct Scsi_Host *shost;
3203 struct iscsi_path *params;
3204 int err;
3205
3206 if (rlen < sizeof(*params))
3207 return -EINVAL;
3208
3209 if (!transport->set_path)
3210 return -ENOSYS;
3211
3212 shost = scsi_host_lookup(ev->u.set_path.host_no);
3213 if (!shost) {
3214 printk(KERN_ERR "set path could not find host no %u\n",
3215 ev->u.set_path.host_no);
3216 return -ENODEV;
3217 }
3218
3219 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3220 err = transport->set_path(shost, params);
3221
3222 scsi_host_put(shost);
3223 return err;
3224}
3225
3226static int iscsi_session_has_conns(int sid)
3227{
3228 struct iscsi_cls_conn *conn;
3229 unsigned long flags;
3230 int found = 0;
3231
3232 spin_lock_irqsave(&connlock, flags);
3233 list_for_each_entry(conn, &connlist, conn_list) {
3234 if (iscsi_conn_get_sid(conn) == sid) {
3235 found = 1;
3236 break;
3237 }
3238 }
3239 spin_unlock_irqrestore(&connlock, flags);
3240
3241 return found;
3242}
3243
3244static int
3245iscsi_set_iface_params(struct iscsi_transport *transport,
3246 struct iscsi_uevent *ev, uint32_t len)
3247{
3248 char *data = (char *)ev + sizeof(*ev);
3249 struct Scsi_Host *shost;
3250 int err;
3251
3252 if (!transport->set_iface_param)
3253 return -ENOSYS;
3254
3255 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3256 if (!shost) {
3257 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3258 ev->u.set_iface_params.host_no);
3259 return -ENODEV;
3260 }
3261
3262 err = transport->set_iface_param(shost, data, len);
3263 scsi_host_put(shost);
3264 return err;
3265}
3266
3267static int
3268iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen)
3269{
3270 struct Scsi_Host *shost;
3271 struct sockaddr *dst_addr;
3272 int err;
3273
3274 if (rlen < sizeof(*dst_addr))
3275 return -EINVAL;
3276
3277 if (!transport->send_ping)
3278 return -ENOSYS;
3279
3280 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3281 if (!shost) {
3282 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3283 ev->u.iscsi_ping.host_no);
3284 return -ENODEV;
3285 }
3286
3287 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3288 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3289 ev->u.iscsi_ping.iface_type,
3290 ev->u.iscsi_ping.payload_size,
3291 ev->u.iscsi_ping.pid,
3292 dst_addr);
3293 scsi_host_put(shost);
3294 return err;
3295}
3296
3297static int
3298iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3299{
3300 struct iscsi_uevent *ev = nlmsg_data(nlh);
3301 struct Scsi_Host *shost = NULL;
3302 struct iscsi_chap_rec *chap_rec;
3303 struct iscsi_internal *priv;
3304 struct sk_buff *skbchap;
3305 struct nlmsghdr *nlhchap;
3306 struct iscsi_uevent *evchap;
3307 uint32_t chap_buf_size;
3308 int len, err = 0;
3309 char *buf;
3310
3311 if (!transport->get_chap)
3312 return -EINVAL;
3313
3314 priv = iscsi_if_transport_lookup(transport);
3315 if (!priv)
3316 return -EINVAL;
3317
3318 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3319 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3320
3321 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3322 if (!shost) {
3323 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3324 __func__, ev->u.get_chap.host_no);
3325 return -ENODEV;
3326 }
3327
3328 do {
3329 int actual_size;
3330
3331 skbchap = alloc_skb(len, GFP_KERNEL);
3332 if (!skbchap) {
3333 printk(KERN_ERR "can not deliver chap: OOM\n");
3334 err = -ENOMEM;
3335 goto exit_get_chap;
3336 }
3337
3338 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3339 (len - sizeof(*nlhchap)), 0);
3340 evchap = nlmsg_data(nlhchap);
3341 memset(evchap, 0, sizeof(*evchap));
3342 evchap->transport_handle = iscsi_handle(transport);
3343 evchap->type = nlh->nlmsg_type;
3344 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3345 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3346 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3347 buf = (char *)evchap + sizeof(*evchap);
3348 memset(buf, 0, chap_buf_size);
3349
3350 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3351 &evchap->u.get_chap.num_entries, buf);
3352
3353 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3354 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3355 nlhchap->nlmsg_len = actual_size;
3356
3357 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3358 GFP_KERNEL);
3359 } while (err < 0 && err != -ECONNREFUSED);
3360
3361exit_get_chap:
3362 scsi_host_put(shost);
3363 return err;
3364}
3365
3366static int iscsi_set_chap(struct iscsi_transport *transport,
3367 struct iscsi_uevent *ev, uint32_t len)
3368{
3369 char *data = (char *)ev + sizeof(*ev);
3370 struct Scsi_Host *shost;
3371 int err = 0;
3372
3373 if (!transport->set_chap)
3374 return -ENOSYS;
3375
3376 shost = scsi_host_lookup(ev->u.set_path.host_no);
3377 if (!shost) {
3378 pr_err("%s could not find host no %u\n",
3379 __func__, ev->u.set_path.host_no);
3380 return -ENODEV;
3381 }
3382
3383 err = transport->set_chap(shost, data, len);
3384 scsi_host_put(shost);
3385 return err;
3386}
3387
3388static int iscsi_delete_chap(struct iscsi_transport *transport,
3389 struct iscsi_uevent *ev)
3390{
3391 struct Scsi_Host *shost;
3392 int err = 0;
3393
3394 if (!transport->delete_chap)
3395 return -ENOSYS;
3396
3397 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3398 if (!shost) {
3399 printk(KERN_ERR "%s could not find host no %u\n",
3400 __func__, ev->u.delete_chap.host_no);
3401 return -ENODEV;
3402 }
3403
3404 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3405 scsi_host_put(shost);
3406 return err;
3407}
3408
3409static const struct {
3410 enum iscsi_discovery_parent_type value;
3411 char *name;
3412} iscsi_discovery_parent_names[] = {
3413 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3414 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3415 {ISCSI_DISC_PARENT_ISNS, "isns" },
3416};
3417
3418char *iscsi_get_discovery_parent_name(int parent_type)
3419{
3420 int i;
3421 char *state = "Unknown!";
3422
3423 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3424 if (iscsi_discovery_parent_names[i].value & parent_type) {
3425 state = iscsi_discovery_parent_names[i].name;
3426 break;
3427 }
3428 }
3429 return state;
3430}
3431EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3432
3433static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3434 struct iscsi_uevent *ev, uint32_t len)
3435{
3436 char *data = (char *)ev + sizeof(*ev);
3437 struct Scsi_Host *shost;
3438 struct iscsi_bus_flash_session *fnode_sess;
3439 struct iscsi_bus_flash_conn *fnode_conn;
3440 struct device *dev;
3441 uint32_t idx;
3442 int err = 0;
3443
3444 if (!transport->set_flashnode_param) {
3445 err = -ENOSYS;
3446 goto exit_set_fnode;
3447 }
3448
3449 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3450 if (!shost) {
3451 pr_err("%s could not find host no %u\n",
3452 __func__, ev->u.set_flashnode.host_no);
3453 err = -ENODEV;
3454 goto exit_set_fnode;
3455 }
3456
3457 idx = ev->u.set_flashnode.flashnode_idx;
3458 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3459 if (!fnode_sess) {
3460 pr_err("%s could not find flashnode %u for host no %u\n",
3461 __func__, idx, ev->u.set_flashnode.host_no);
3462 err = -ENODEV;
3463 goto put_host;
3464 }
3465
3466 dev = iscsi_find_flashnode_conn(fnode_sess);
3467 if (!dev) {
3468 err = -ENODEV;
3469 goto put_sess;
3470 }
3471
3472 fnode_conn = iscsi_dev_to_flash_conn(dev);
3473 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3474 put_device(dev);
3475
3476put_sess:
3477 put_device(&fnode_sess->dev);
3478
3479put_host:
3480 scsi_host_put(shost);
3481
3482exit_set_fnode:
3483 return err;
3484}
3485
3486static int iscsi_new_flashnode(struct iscsi_transport *transport,
3487 struct iscsi_uevent *ev, uint32_t len)
3488{
3489 char *data = (char *)ev + sizeof(*ev);
3490 struct Scsi_Host *shost;
3491 int index;
3492 int err = 0;
3493
3494 if (!transport->new_flashnode) {
3495 err = -ENOSYS;
3496 goto exit_new_fnode;
3497 }
3498
3499 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3500 if (!shost) {
3501 pr_err("%s could not find host no %u\n",
3502 __func__, ev->u.new_flashnode.host_no);
3503 err = -ENODEV;
3504 goto exit_new_fnode;
3505 }
3506
3507 index = transport->new_flashnode(shost, data, len);
3508
3509 if (index >= 0)
3510 ev->r.new_flashnode_ret.flashnode_idx = index;
3511 else
3512 err = -EIO;
3513
3514 scsi_host_put(shost);
3515
3516exit_new_fnode:
3517 return err;
3518}
3519
3520static int iscsi_del_flashnode(struct iscsi_transport *transport,
3521 struct iscsi_uevent *ev)
3522{
3523 struct Scsi_Host *shost;
3524 struct iscsi_bus_flash_session *fnode_sess;
3525 uint32_t idx;
3526 int err = 0;
3527
3528 if (!transport->del_flashnode) {
3529 err = -ENOSYS;
3530 goto exit_del_fnode;
3531 }
3532
3533 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3534 if (!shost) {
3535 pr_err("%s could not find host no %u\n",
3536 __func__, ev->u.del_flashnode.host_no);
3537 err = -ENODEV;
3538 goto exit_del_fnode;
3539 }
3540
3541 idx = ev->u.del_flashnode.flashnode_idx;
3542 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3543 if (!fnode_sess) {
3544 pr_err("%s could not find flashnode %u for host no %u\n",
3545 __func__, idx, ev->u.del_flashnode.host_no);
3546 err = -ENODEV;
3547 goto put_host;
3548 }
3549
3550 err = transport->del_flashnode(fnode_sess);
3551 put_device(&fnode_sess->dev);
3552
3553put_host:
3554 scsi_host_put(shost);
3555
3556exit_del_fnode:
3557 return err;
3558}
3559
3560static int iscsi_login_flashnode(struct iscsi_transport *transport,
3561 struct iscsi_uevent *ev)
3562{
3563 struct Scsi_Host *shost;
3564 struct iscsi_bus_flash_session *fnode_sess;
3565 struct iscsi_bus_flash_conn *fnode_conn;
3566 struct device *dev;
3567 uint32_t idx;
3568 int err = 0;
3569
3570 if (!transport->login_flashnode) {
3571 err = -ENOSYS;
3572 goto exit_login_fnode;
3573 }
3574
3575 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3576 if (!shost) {
3577 pr_err("%s could not find host no %u\n",
3578 __func__, ev->u.login_flashnode.host_no);
3579 err = -ENODEV;
3580 goto exit_login_fnode;
3581 }
3582
3583 idx = ev->u.login_flashnode.flashnode_idx;
3584 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3585 if (!fnode_sess) {
3586 pr_err("%s could not find flashnode %u for host no %u\n",
3587 __func__, idx, ev->u.login_flashnode.host_no);
3588 err = -ENODEV;
3589 goto put_host;
3590 }
3591
3592 dev = iscsi_find_flashnode_conn(fnode_sess);
3593 if (!dev) {
3594 err = -ENODEV;
3595 goto put_sess;
3596 }
3597
3598 fnode_conn = iscsi_dev_to_flash_conn(dev);
3599 err = transport->login_flashnode(fnode_sess, fnode_conn);
3600 put_device(dev);
3601
3602put_sess:
3603 put_device(&fnode_sess->dev);
3604
3605put_host:
3606 scsi_host_put(shost);
3607
3608exit_login_fnode:
3609 return err;
3610}
3611
3612static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3613 struct iscsi_uevent *ev)
3614{
3615 struct Scsi_Host *shost;
3616 struct iscsi_bus_flash_session *fnode_sess;
3617 struct iscsi_bus_flash_conn *fnode_conn;
3618 struct device *dev;
3619 uint32_t idx;
3620 int err = 0;
3621
3622 if (!transport->logout_flashnode) {
3623 err = -ENOSYS;
3624 goto exit_logout_fnode;
3625 }
3626
3627 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3628 if (!shost) {
3629 pr_err("%s could not find host no %u\n",
3630 __func__, ev->u.logout_flashnode.host_no);
3631 err = -ENODEV;
3632 goto exit_logout_fnode;
3633 }
3634
3635 idx = ev->u.logout_flashnode.flashnode_idx;
3636 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3637 if (!fnode_sess) {
3638 pr_err("%s could not find flashnode %u for host no %u\n",
3639 __func__, idx, ev->u.logout_flashnode.host_no);
3640 err = -ENODEV;
3641 goto put_host;
3642 }
3643
3644 dev = iscsi_find_flashnode_conn(fnode_sess);
3645 if (!dev) {
3646 err = -ENODEV;
3647 goto put_sess;
3648 }
3649
3650 fnode_conn = iscsi_dev_to_flash_conn(dev);
3651
3652 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3653 put_device(dev);
3654
3655put_sess:
3656 put_device(&fnode_sess->dev);
3657
3658put_host:
3659 scsi_host_put(shost);
3660
3661exit_logout_fnode:
3662 return err;
3663}
3664
3665static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3666 struct iscsi_uevent *ev)
3667{
3668 struct Scsi_Host *shost;
3669 struct iscsi_cls_session *session;
3670 int err = 0;
3671
3672 if (!transport->logout_flashnode_sid) {
3673 err = -ENOSYS;
3674 goto exit_logout_sid;
3675 }
3676
3677 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3678 if (!shost) {
3679 pr_err("%s could not find host no %u\n",
3680 __func__, ev->u.logout_flashnode.host_no);
3681 err = -ENODEV;
3682 goto exit_logout_sid;
3683 }
3684
3685 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3686 if (!session) {
3687 pr_err("%s could not find session id %u\n",
3688 __func__, ev->u.logout_flashnode_sid.sid);
3689 err = -EINVAL;
3690 goto put_host;
3691 }
3692
3693 err = transport->logout_flashnode_sid(session);
3694
3695put_host:
3696 scsi_host_put(shost);
3697
3698exit_logout_sid:
3699 return err;
3700}
3701
3702static int
3703iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3704{
3705 struct iscsi_uevent *ev = nlmsg_data(nlh);
3706 struct Scsi_Host *shost = NULL;
3707 struct iscsi_internal *priv;
3708 struct sk_buff *skbhost_stats;
3709 struct nlmsghdr *nlhhost_stats;
3710 struct iscsi_uevent *evhost_stats;
3711 int host_stats_size = 0;
3712 int len, err = 0;
3713 char *buf;
3714
3715 if (!transport->get_host_stats)
3716 return -ENOSYS;
3717
3718 priv = iscsi_if_transport_lookup(transport);
3719 if (!priv)
3720 return -EINVAL;
3721
3722 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3723 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3724
3725 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3726 if (!shost) {
3727 pr_err("%s: failed. Could not find host no %u\n",
3728 __func__, ev->u.get_host_stats.host_no);
3729 return -ENODEV;
3730 }
3731
3732 do {
3733 int actual_size;
3734
3735 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3736 if (!skbhost_stats) {
3737 pr_err("cannot deliver host stats: OOM\n");
3738 err = -ENOMEM;
3739 goto exit_host_stats;
3740 }
3741
3742 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3743 (len - sizeof(*nlhhost_stats)), 0);
3744 evhost_stats = nlmsg_data(nlhhost_stats);
3745 memset(evhost_stats, 0, sizeof(*evhost_stats));
3746 evhost_stats->transport_handle = iscsi_handle(transport);
3747 evhost_stats->type = nlh->nlmsg_type;
3748 evhost_stats->u.get_host_stats.host_no =
3749 ev->u.get_host_stats.host_no;
3750 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3751 memset(buf, 0, host_stats_size);
3752
3753 err = transport->get_host_stats(shost, buf, host_stats_size);
3754 if (err) {
3755 kfree_skb(skbhost_stats);
3756 goto exit_host_stats;
3757 }
3758
3759 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3760 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3761 nlhhost_stats->nlmsg_len = actual_size;
3762
3763 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3764 GFP_KERNEL);
3765 } while (err < 0 && err != -ECONNREFUSED);
3766
3767exit_host_stats:
3768 scsi_host_put(shost);
3769 return err;
3770}
3771
3772static int iscsi_if_transport_conn(struct iscsi_transport *transport,
3773 struct nlmsghdr *nlh, u32 pdu_len)
3774{
3775 struct iscsi_uevent *ev = nlmsg_data(nlh);
3776 struct iscsi_cls_session *session;
3777 struct iscsi_cls_conn *conn = NULL;
3778 struct iscsi_endpoint *ep;
3779 int err = 0;
3780
3781 switch (nlh->nlmsg_type) {
3782 case ISCSI_UEVENT_CREATE_CONN:
3783 return iscsi_if_create_conn(transport, ev);
3784 case ISCSI_UEVENT_DESTROY_CONN:
3785 return iscsi_if_destroy_conn(transport, ev);
3786 case ISCSI_UEVENT_STOP_CONN:
3787 conn = iscsi_conn_lookup(ev->u.stop_conn.sid,
3788 ev->u.stop_conn.cid);
3789 if (!conn)
3790 return -EINVAL;
3791
3792 return iscsi_if_stop_conn(conn, ev->u.stop_conn.flag);
3793 }
3794
3795 /*
3796 * The following cmds need to be run under the ep_mutex so in kernel
3797 * conn cleanup (ep_disconnect + unbind and conn) is not done while
3798 * these are running. They also must not run if we have just run a conn
3799 * cleanup because they would set the state in a way that might allow
3800 * IO or send IO themselves.
3801 */
3802 switch (nlh->nlmsg_type) {
3803 case ISCSI_UEVENT_START_CONN:
3804 conn = iscsi_conn_lookup(ev->u.start_conn.sid,
3805 ev->u.start_conn.cid);
3806 break;
3807 case ISCSI_UEVENT_BIND_CONN:
3808 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3809 break;
3810 case ISCSI_UEVENT_SEND_PDU:
3811 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3812 break;
3813 }
3814
3815 if (!conn)
3816 return -EINVAL;
3817
3818 mutex_lock(&conn->ep_mutex);
3819 spin_lock_irq(&conn->lock);
3820 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
3821 spin_unlock_irq(&conn->lock);
3822 mutex_unlock(&conn->ep_mutex);
3823 ev->r.retcode = -ENOTCONN;
3824 return 0;
3825 }
3826 spin_unlock_irq(&conn->lock);
3827
3828 switch (nlh->nlmsg_type) {
3829 case ISCSI_UEVENT_BIND_CONN:
3830 session = iscsi_session_lookup(ev->u.b_conn.sid);
3831 if (!session) {
3832 err = -EINVAL;
3833 break;
3834 }
3835
3836 ev->r.retcode = transport->bind_conn(session, conn,
3837 ev->u.b_conn.transport_eph,
3838 ev->u.b_conn.is_leading);
3839 if (!ev->r.retcode)
3840 WRITE_ONCE(conn->state, ISCSI_CONN_BOUND);
3841
3842 if (ev->r.retcode || !transport->ep_connect)
3843 break;
3844
3845 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3846 if (ep) {
3847 ep->conn = conn;
3848 conn->ep = ep;
3849 iscsi_put_endpoint(ep);
3850 } else {
3851 err = -ENOTCONN;
3852 iscsi_cls_conn_printk(KERN_ERR, conn,
3853 "Could not set ep conn binding\n");
3854 }
3855 break;
3856 case ISCSI_UEVENT_START_CONN:
3857 ev->r.retcode = transport->start_conn(conn);
3858 if (!ev->r.retcode)
3859 WRITE_ONCE(conn->state, ISCSI_CONN_UP);
3860
3861 break;
3862 case ISCSI_UEVENT_SEND_PDU:
3863 if ((ev->u.send_pdu.hdr_size > pdu_len) ||
3864 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {
3865 err = -EINVAL;
3866 break;
3867 }
3868
3869 ev->r.retcode = transport->send_pdu(conn,
3870 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)),
3871 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3872 ev->u.send_pdu.data_size);
3873 break;
3874 default:
3875 err = -ENOSYS;
3876 }
3877
3878 mutex_unlock(&conn->ep_mutex);
3879 return err;
3880}
3881
3882static int
3883iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3884{
3885 int err = 0;
3886 u32 portid;
3887 struct iscsi_uevent *ev = nlmsg_data(nlh);
3888 struct iscsi_transport *transport = NULL;
3889 struct iscsi_internal *priv;
3890 struct iscsi_cls_session *session;
3891 struct iscsi_endpoint *ep = NULL;
3892 u32 rlen;
3893
3894 if (!netlink_capable(skb, CAP_SYS_ADMIN))
3895 return -EPERM;
3896
3897 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3898 *group = ISCSI_NL_GRP_UIP;
3899 else
3900 *group = ISCSI_NL_GRP_ISCSID;
3901
3902 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3903 if (!priv)
3904 return -EINVAL;
3905 transport = priv->iscsi_transport;
3906
3907 if (!try_module_get(transport->owner))
3908 return -EINVAL;
3909
3910 portid = NETLINK_CB(skb).portid;
3911
3912 /*
3913 * Even though the remaining payload may not be regarded as nlattr,
3914 * (like address or something else), calculate the remaining length
3915 * here to ease following length checks.
3916 */
3917 rlen = nlmsg_attrlen(nlh, sizeof(*ev));
3918
3919 switch (nlh->nlmsg_type) {
3920 case ISCSI_UEVENT_CREATE_SESSION:
3921 err = iscsi_if_create_session(priv, ep, ev,
3922 portid,
3923 ev->u.c_session.initial_cmdsn,
3924 ev->u.c_session.cmds_max,
3925 ev->u.c_session.queue_depth);
3926 break;
3927 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3928 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3929 if (!ep) {
3930 err = -EINVAL;
3931 break;
3932 }
3933
3934 err = iscsi_if_create_session(priv, ep, ev,
3935 portid,
3936 ev->u.c_bound_session.initial_cmdsn,
3937 ev->u.c_bound_session.cmds_max,
3938 ev->u.c_bound_session.queue_depth);
3939 iscsi_put_endpoint(ep);
3940 break;
3941 case ISCSI_UEVENT_DESTROY_SESSION:
3942 session = iscsi_session_lookup(ev->u.d_session.sid);
3943 if (!session)
3944 err = -EINVAL;
3945 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3946 err = -EBUSY;
3947 else
3948 transport->destroy_session(session);
3949 break;
3950 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3951 session = iscsi_session_lookup(ev->u.d_session.sid);
3952 if (!session)
3953 err = -EINVAL;
3954 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3955 err = -EBUSY;
3956 else {
3957 unsigned long flags;
3958
3959 /* Prevent this session from being found again */
3960 spin_lock_irqsave(&sesslock, flags);
3961 list_del_init(&session->sess_list);
3962 spin_unlock_irqrestore(&sesslock, flags);
3963
3964 queue_work(system_dfl_wq, &session->destroy_work);
3965 }
3966 break;
3967 case ISCSI_UEVENT_UNBIND_SESSION:
3968 session = iscsi_session_lookup(ev->u.d_session.sid);
3969 if (session)
3970 queue_work(session->workq, &session->unbind_work);
3971 else
3972 err = -EINVAL;
3973 break;
3974 case ISCSI_UEVENT_SET_PARAM:
3975 err = iscsi_if_set_param(transport, ev, rlen);
3976 break;
3977 case ISCSI_UEVENT_CREATE_CONN:
3978 case ISCSI_UEVENT_DESTROY_CONN:
3979 case ISCSI_UEVENT_STOP_CONN:
3980 case ISCSI_UEVENT_START_CONN:
3981 case ISCSI_UEVENT_BIND_CONN:
3982 case ISCSI_UEVENT_SEND_PDU:
3983 err = iscsi_if_transport_conn(transport, nlh, rlen);
3984 break;
3985 case ISCSI_UEVENT_GET_STATS:
3986 err = iscsi_if_get_stats(transport, nlh);
3987 break;
3988 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3989 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3990 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3991 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3992 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type, rlen);
3993 break;
3994 case ISCSI_UEVENT_TGT_DSCVR:
3995 err = iscsi_tgt_dscvr(transport, ev, rlen);
3996 break;
3997 case ISCSI_UEVENT_SET_HOST_PARAM:
3998 err = iscsi_set_host_param(transport, ev, rlen);
3999 break;
4000 case ISCSI_UEVENT_PATH_UPDATE:
4001 err = iscsi_set_path(transport, ev, rlen);
4002 break;
4003 case ISCSI_UEVENT_SET_IFACE_PARAMS:
4004 err = iscsi_set_iface_params(transport, ev, rlen);
4005 break;
4006 case ISCSI_UEVENT_PING:
4007 err = iscsi_send_ping(transport, ev, rlen);
4008 break;
4009 case ISCSI_UEVENT_GET_CHAP:
4010 err = iscsi_get_chap(transport, nlh);
4011 break;
4012 case ISCSI_UEVENT_DELETE_CHAP:
4013 err = iscsi_delete_chap(transport, ev);
4014 break;
4015 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
4016 err = iscsi_set_flashnode_param(transport, ev, rlen);
4017 break;
4018 case ISCSI_UEVENT_NEW_FLASHNODE:
4019 err = iscsi_new_flashnode(transport, ev, rlen);
4020 break;
4021 case ISCSI_UEVENT_DEL_FLASHNODE:
4022 err = iscsi_del_flashnode(transport, ev);
4023 break;
4024 case ISCSI_UEVENT_LOGIN_FLASHNODE:
4025 err = iscsi_login_flashnode(transport, ev);
4026 break;
4027 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
4028 err = iscsi_logout_flashnode(transport, ev);
4029 break;
4030 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
4031 err = iscsi_logout_flashnode_sid(transport, ev);
4032 break;
4033 case ISCSI_UEVENT_SET_CHAP:
4034 err = iscsi_set_chap(transport, ev, rlen);
4035 break;
4036 case ISCSI_UEVENT_GET_HOST_STATS:
4037 err = iscsi_get_host_stats(transport, nlh);
4038 break;
4039 default:
4040 err = -ENOSYS;
4041 break;
4042 }
4043
4044 module_put(transport->owner);
4045 return err;
4046}
4047
4048/*
4049 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
4050 * Malformed skbs with wrong lengths or invalid creds are not processed.
4051 */
4052static void
4053iscsi_if_rx(struct sk_buff *skb)
4054{
4055 u32 portid = NETLINK_CB(skb).portid;
4056
4057 mutex_lock(&rx_queue_mutex);
4058 while (skb->len >= NLMSG_HDRLEN) {
4059 int err;
4060 uint32_t rlen;
4061 struct nlmsghdr *nlh;
4062 struct iscsi_uevent *ev;
4063 uint32_t group;
4064 int retries = ISCSI_SEND_MAX_ALLOWED;
4065
4066 nlh = nlmsg_hdr(skb);
4067 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
4068 skb->len < nlh->nlmsg_len) {
4069 break;
4070 }
4071
4072 ev = nlmsg_data(nlh);
4073 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
4074 if (rlen > skb->len)
4075 rlen = skb->len;
4076
4077 err = iscsi_if_recv_msg(skb, nlh, &group);
4078 if (err) {
4079 ev->type = ISCSI_KEVENT_IF_ERROR;
4080 ev->iferror = err;
4081 }
4082 do {
4083 /*
4084 * special case for GET_STATS, GET_CHAP and GET_HOST_STATS:
4085 * on success - sending reply and stats from
4086 * inside of if_recv_msg(),
4087 * on error - fall through.
4088 */
4089 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
4090 break;
4091 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
4092 break;
4093 if (ev->type == ISCSI_UEVENT_GET_HOST_STATS && !err)
4094 break;
4095 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
4096 ev, sizeof(*ev));
4097 if (err == -EAGAIN && --retries < 0) {
4098 printk(KERN_WARNING "Send reply failed, error %d\n", err);
4099 break;
4100 }
4101 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
4102 skb_pull(skb, rlen);
4103 }
4104 mutex_unlock(&rx_queue_mutex);
4105}
4106
4107#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
4108struct device_attribute dev_attr_##_prefix##_##_name = \
4109 __ATTR(_name,_mode,_show,_store)
4110
4111/*
4112 * iSCSI connection attrs
4113 */
4114#define iscsi_conn_attr_show(param) \
4115static ssize_t \
4116show_conn_param_##param(struct device *dev, \
4117 struct device_attribute *attr, char *buf) \
4118{ \
4119 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
4120 struct iscsi_transport *t = conn->transport; \
4121 return t->get_conn_param(conn, param, buf); \
4122}
4123
4124#define iscsi_conn_attr(field, param) \
4125 iscsi_conn_attr_show(param) \
4126static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
4127 NULL);
4128
4129iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
4130iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
4131iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
4132iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
4133iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
4134iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
4135iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
4136iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
4137iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
4138iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
4139iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
4140iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
4141iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
4142iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
4143iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
4144iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
4145iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
4146iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
4147iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
4148iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
4149iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
4150iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
4151iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
4152iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
4153iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
4154iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
4155iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
4156iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
4157
4158static const char *const connection_state_names[] = {
4159 [ISCSI_CONN_UP] = "up",
4160 [ISCSI_CONN_DOWN] = "down",
4161 [ISCSI_CONN_FAILED] = "failed",
4162 [ISCSI_CONN_BOUND] = "bound"
4163};
4164
4165static ssize_t show_conn_state(struct device *dev,
4166 struct device_attribute *attr, char *buf)
4167{
4168 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
4169 const char *state = "unknown";
4170 int conn_state = READ_ONCE(conn->state);
4171
4172 if (conn_state >= 0 &&
4173 conn_state < ARRAY_SIZE(connection_state_names))
4174 state = connection_state_names[conn_state];
4175
4176 return sysfs_emit(buf, "%s\n", state);
4177}
4178static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
4179 NULL);
4180
4181#define iscsi_conn_ep_attr_show(param) \
4182static ssize_t show_conn_ep_param_##param(struct device *dev, \
4183 struct device_attribute *attr,\
4184 char *buf) \
4185{ \
4186 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
4187 struct iscsi_transport *t = conn->transport; \
4188 struct iscsi_endpoint *ep; \
4189 ssize_t rc; \
4190 \
4191 /* \
4192 * Need to make sure ep_disconnect does not free the LLD's \
4193 * interconnect resources while we are trying to read them. \
4194 */ \
4195 mutex_lock(&conn->ep_mutex); \
4196 ep = conn->ep; \
4197 if (!ep && t->ep_connect) { \
4198 mutex_unlock(&conn->ep_mutex); \
4199 return -ENOTCONN; \
4200 } \
4201 \
4202 if (ep) \
4203 rc = t->get_ep_param(ep, param, buf); \
4204 else \
4205 rc = t->get_conn_param(conn, param, buf); \
4206 mutex_unlock(&conn->ep_mutex); \
4207 return rc; \
4208}
4209
4210#define iscsi_conn_ep_attr(field, param) \
4211 iscsi_conn_ep_attr_show(param) \
4212static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
4213 show_conn_ep_param_##param, NULL);
4214
4215iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
4216iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
4217
4218static struct attribute *iscsi_conn_attrs[] = {
4219 &dev_attr_conn_max_recv_dlength.attr,
4220 &dev_attr_conn_max_xmit_dlength.attr,
4221 &dev_attr_conn_header_digest.attr,
4222 &dev_attr_conn_data_digest.attr,
4223 &dev_attr_conn_ifmarker.attr,
4224 &dev_attr_conn_ofmarker.attr,
4225 &dev_attr_conn_address.attr,
4226 &dev_attr_conn_port.attr,
4227 &dev_attr_conn_exp_statsn.attr,
4228 &dev_attr_conn_persistent_address.attr,
4229 &dev_attr_conn_persistent_port.attr,
4230 &dev_attr_conn_ping_tmo.attr,
4231 &dev_attr_conn_recv_tmo.attr,
4232 &dev_attr_conn_local_port.attr,
4233 &dev_attr_conn_statsn.attr,
4234 &dev_attr_conn_keepalive_tmo.attr,
4235 &dev_attr_conn_max_segment_size.attr,
4236 &dev_attr_conn_tcp_timestamp_stat.attr,
4237 &dev_attr_conn_tcp_wsf_disable.attr,
4238 &dev_attr_conn_tcp_nagle_disable.attr,
4239 &dev_attr_conn_tcp_timer_scale.attr,
4240 &dev_attr_conn_tcp_timestamp_enable.attr,
4241 &dev_attr_conn_fragment_disable.attr,
4242 &dev_attr_conn_ipv4_tos.attr,
4243 &dev_attr_conn_ipv6_traffic_class.attr,
4244 &dev_attr_conn_ipv6_flow_label.attr,
4245 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4246 &dev_attr_conn_tcp_xmit_wsf.attr,
4247 &dev_attr_conn_tcp_recv_wsf.attr,
4248 &dev_attr_conn_local_ipaddr.attr,
4249 &dev_attr_conn_state.attr,
4250 NULL,
4251};
4252
4253static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4254 struct attribute *attr, int i)
4255{
4256 struct device *cdev = container_of(kobj, struct device, kobj);
4257 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4258 struct iscsi_transport *t = conn->transport;
4259 int param;
4260
4261 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4262 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4263 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4264 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4265 else if (attr == &dev_attr_conn_header_digest.attr)
4266 param = ISCSI_PARAM_HDRDGST_EN;
4267 else if (attr == &dev_attr_conn_data_digest.attr)
4268 param = ISCSI_PARAM_DATADGST_EN;
4269 else if (attr == &dev_attr_conn_ifmarker.attr)
4270 param = ISCSI_PARAM_IFMARKER_EN;
4271 else if (attr == &dev_attr_conn_ofmarker.attr)
4272 param = ISCSI_PARAM_OFMARKER_EN;
4273 else if (attr == &dev_attr_conn_address.attr)
4274 param = ISCSI_PARAM_CONN_ADDRESS;
4275 else if (attr == &dev_attr_conn_port.attr)
4276 param = ISCSI_PARAM_CONN_PORT;
4277 else if (attr == &dev_attr_conn_exp_statsn.attr)
4278 param = ISCSI_PARAM_EXP_STATSN;
4279 else if (attr == &dev_attr_conn_persistent_address.attr)
4280 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4281 else if (attr == &dev_attr_conn_persistent_port.attr)
4282 param = ISCSI_PARAM_PERSISTENT_PORT;
4283 else if (attr == &dev_attr_conn_ping_tmo.attr)
4284 param = ISCSI_PARAM_PING_TMO;
4285 else if (attr == &dev_attr_conn_recv_tmo.attr)
4286 param = ISCSI_PARAM_RECV_TMO;
4287 else if (attr == &dev_attr_conn_local_port.attr)
4288 param = ISCSI_PARAM_LOCAL_PORT;
4289 else if (attr == &dev_attr_conn_statsn.attr)
4290 param = ISCSI_PARAM_STATSN;
4291 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4292 param = ISCSI_PARAM_KEEPALIVE_TMO;
4293 else if (attr == &dev_attr_conn_max_segment_size.attr)
4294 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4295 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4296 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4297 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4298 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4299 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4300 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4301 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4302 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4303 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4304 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4305 else if (attr == &dev_attr_conn_fragment_disable.attr)
4306 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4307 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4308 param = ISCSI_PARAM_IPV4_TOS;
4309 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4310 param = ISCSI_PARAM_IPV6_TC;
4311 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4312 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4313 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4314 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4315 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4316 param = ISCSI_PARAM_TCP_XMIT_WSF;
4317 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4318 param = ISCSI_PARAM_TCP_RECV_WSF;
4319 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4320 param = ISCSI_PARAM_LOCAL_IPADDR;
4321 else if (attr == &dev_attr_conn_state.attr)
4322 return S_IRUGO;
4323 else {
4324 WARN_ONCE(1, "Invalid conn attr");
4325 return 0;
4326 }
4327
4328 return t->attr_is_visible(ISCSI_PARAM, param);
4329}
4330
4331static struct attribute_group iscsi_conn_group = {
4332 .attrs = iscsi_conn_attrs,
4333 .is_visible = iscsi_conn_attr_is_visible,
4334};
4335
4336/*
4337 * iSCSI session attrs
4338 */
4339#define iscsi_session_attr_show(param, perm) \
4340static ssize_t \
4341show_session_param_##param(struct device *dev, \
4342 struct device_attribute *attr, char *buf) \
4343{ \
4344 struct iscsi_cls_session *session = \
4345 iscsi_dev_to_session(dev->parent); \
4346 struct iscsi_transport *t = session->transport; \
4347 \
4348 if (perm && !capable(CAP_SYS_ADMIN)) \
4349 return -EACCES; \
4350 return t->get_session_param(session, param, buf); \
4351}
4352
4353#define iscsi_session_attr(field, param, perm) \
4354 iscsi_session_attr_show(param, perm) \
4355static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4356 NULL);
4357iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4358iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4359iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4360iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4361iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4362iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4363iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4364iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4365iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4366iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4367iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4368iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4369iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4370iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4371iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4372iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4373iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4374iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4375iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4376iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4377iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4378iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4379iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4380iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4381iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4382iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4383iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4384iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4385iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4386iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4387iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4388iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4389iscsi_session_attr(discovery_auth_optional,
4390 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4391iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4392iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4393iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4394iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4395iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4396iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4397iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4398
4399static ssize_t
4400show_priv_session_target_state(struct device *dev, struct device_attribute *attr,
4401 char *buf)
4402{
4403 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4404
4405 return sysfs_emit(buf, "%s\n",
4406 iscsi_session_target_state_name[session->target_state]);
4407}
4408
4409static ISCSI_CLASS_ATTR(priv_sess, target_state, S_IRUGO,
4410 show_priv_session_target_state, NULL);
4411
4412static ssize_t
4413show_priv_session_state(struct device *dev, struct device_attribute *attr,
4414 char *buf)
4415{
4416 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4417 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));
4418}
4419static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4420 NULL);
4421static ssize_t
4422show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4423 char *buf)
4424{
4425 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4426 return sysfs_emit(buf, "%d\n", session->creator);
4427}
4428static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4429 NULL);
4430static ssize_t
4431show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4432 char *buf)
4433{
4434 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4435 return sysfs_emit(buf, "%d\n", session->target_id);
4436}
4437static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4438 show_priv_session_target_id, NULL);
4439
4440#define iscsi_priv_session_attr_show(field, format) \
4441static ssize_t \
4442show_priv_session_##field(struct device *dev, \
4443 struct device_attribute *attr, char *buf) \
4444{ \
4445 struct iscsi_cls_session *session = \
4446 iscsi_dev_to_session(dev->parent); \
4447 if (session->field == -1) \
4448 return sysfs_emit(buf, "off\n"); \
4449 return sysfs_emit(buf, format"\n", session->field); \
4450}
4451
4452#define iscsi_priv_session_attr_store(field) \
4453static ssize_t \
4454store_priv_session_##field(struct device *dev, \
4455 struct device_attribute *attr, \
4456 const char *buf, size_t count) \
4457{ \
4458 int val; \
4459 char *cp; \
4460 struct iscsi_cls_session *session = \
4461 iscsi_dev_to_session(dev->parent); \
4462 if ((session->state == ISCSI_SESSION_FREE) || \
4463 (session->state == ISCSI_SESSION_FAILED)) \
4464 return -EBUSY; \
4465 if (strncmp(buf, "off", 3) == 0) { \
4466 session->field = -1; \
4467 session->field##_sysfs_override = true; \
4468 } else { \
4469 val = simple_strtoul(buf, &cp, 0); \
4470 if (*cp != '\0' && *cp != '\n') \
4471 return -EINVAL; \
4472 session->field = val; \
4473 session->field##_sysfs_override = true; \
4474 } \
4475 return count; \
4476}
4477
4478#define iscsi_priv_session_rw_attr(field, format) \
4479 iscsi_priv_session_attr_show(field, format) \
4480 iscsi_priv_session_attr_store(field) \
4481static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4482 show_priv_session_##field, \
4483 store_priv_session_##field)
4484
4485iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4486
4487static struct attribute *iscsi_session_attrs[] = {
4488 &dev_attr_sess_initial_r2t.attr,
4489 &dev_attr_sess_max_outstanding_r2t.attr,
4490 &dev_attr_sess_immediate_data.attr,
4491 &dev_attr_sess_first_burst_len.attr,
4492 &dev_attr_sess_max_burst_len.attr,
4493 &dev_attr_sess_data_pdu_in_order.attr,
4494 &dev_attr_sess_data_seq_in_order.attr,
4495 &dev_attr_sess_erl.attr,
4496 &dev_attr_sess_targetname.attr,
4497 &dev_attr_sess_tpgt.attr,
4498 &dev_attr_sess_password.attr,
4499 &dev_attr_sess_password_in.attr,
4500 &dev_attr_sess_username.attr,
4501 &dev_attr_sess_username_in.attr,
4502 &dev_attr_sess_fast_abort.attr,
4503 &dev_attr_sess_abort_tmo.attr,
4504 &dev_attr_sess_lu_reset_tmo.attr,
4505 &dev_attr_sess_tgt_reset_tmo.attr,
4506 &dev_attr_sess_ifacename.attr,
4507 &dev_attr_sess_initiatorname.attr,
4508 &dev_attr_sess_targetalias.attr,
4509 &dev_attr_sess_boot_root.attr,
4510 &dev_attr_sess_boot_nic.attr,
4511 &dev_attr_sess_boot_target.attr,
4512 &dev_attr_priv_sess_recovery_tmo.attr,
4513 &dev_attr_priv_sess_state.attr,
4514 &dev_attr_priv_sess_target_state.attr,
4515 &dev_attr_priv_sess_creator.attr,
4516 &dev_attr_sess_chap_out_idx.attr,
4517 &dev_attr_sess_chap_in_idx.attr,
4518 &dev_attr_priv_sess_target_id.attr,
4519 &dev_attr_sess_auto_snd_tgt_disable.attr,
4520 &dev_attr_sess_discovery_session.attr,
4521 &dev_attr_sess_portal_type.attr,
4522 &dev_attr_sess_chap_auth.attr,
4523 &dev_attr_sess_discovery_logout.attr,
4524 &dev_attr_sess_bidi_chap.attr,
4525 &dev_attr_sess_discovery_auth_optional.attr,
4526 &dev_attr_sess_def_time2wait.attr,
4527 &dev_attr_sess_def_time2retain.attr,
4528 &dev_attr_sess_isid.attr,
4529 &dev_attr_sess_tsid.attr,
4530 &dev_attr_sess_def_taskmgmt_tmo.attr,
4531 &dev_attr_sess_discovery_parent_idx.attr,
4532 &dev_attr_sess_discovery_parent_type.attr,
4533 NULL,
4534};
4535
4536static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4537 struct attribute *attr, int i)
4538{
4539 struct device *cdev = container_of(kobj, struct device, kobj);
4540 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4541 struct iscsi_transport *t = session->transport;
4542 int param;
4543
4544 if (attr == &dev_attr_sess_initial_r2t.attr)
4545 param = ISCSI_PARAM_INITIAL_R2T_EN;
4546 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4547 param = ISCSI_PARAM_MAX_R2T;
4548 else if (attr == &dev_attr_sess_immediate_data.attr)
4549 param = ISCSI_PARAM_IMM_DATA_EN;
4550 else if (attr == &dev_attr_sess_first_burst_len.attr)
4551 param = ISCSI_PARAM_FIRST_BURST;
4552 else if (attr == &dev_attr_sess_max_burst_len.attr)
4553 param = ISCSI_PARAM_MAX_BURST;
4554 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4555 param = ISCSI_PARAM_PDU_INORDER_EN;
4556 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4557 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4558 else if (attr == &dev_attr_sess_erl.attr)
4559 param = ISCSI_PARAM_ERL;
4560 else if (attr == &dev_attr_sess_targetname.attr)
4561 param = ISCSI_PARAM_TARGET_NAME;
4562 else if (attr == &dev_attr_sess_tpgt.attr)
4563 param = ISCSI_PARAM_TPGT;
4564 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4565 param = ISCSI_PARAM_CHAP_IN_IDX;
4566 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4567 param = ISCSI_PARAM_CHAP_OUT_IDX;
4568 else if (attr == &dev_attr_sess_password.attr)
4569 param = ISCSI_PARAM_USERNAME;
4570 else if (attr == &dev_attr_sess_password_in.attr)
4571 param = ISCSI_PARAM_USERNAME_IN;
4572 else if (attr == &dev_attr_sess_username.attr)
4573 param = ISCSI_PARAM_PASSWORD;
4574 else if (attr == &dev_attr_sess_username_in.attr)
4575 param = ISCSI_PARAM_PASSWORD_IN;
4576 else if (attr == &dev_attr_sess_fast_abort.attr)
4577 param = ISCSI_PARAM_FAST_ABORT;
4578 else if (attr == &dev_attr_sess_abort_tmo.attr)
4579 param = ISCSI_PARAM_ABORT_TMO;
4580 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4581 param = ISCSI_PARAM_LU_RESET_TMO;
4582 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4583 param = ISCSI_PARAM_TGT_RESET_TMO;
4584 else if (attr == &dev_attr_sess_ifacename.attr)
4585 param = ISCSI_PARAM_IFACE_NAME;
4586 else if (attr == &dev_attr_sess_initiatorname.attr)
4587 param = ISCSI_PARAM_INITIATOR_NAME;
4588 else if (attr == &dev_attr_sess_targetalias.attr)
4589 param = ISCSI_PARAM_TARGET_ALIAS;
4590 else if (attr == &dev_attr_sess_boot_root.attr)
4591 param = ISCSI_PARAM_BOOT_ROOT;
4592 else if (attr == &dev_attr_sess_boot_nic.attr)
4593 param = ISCSI_PARAM_BOOT_NIC;
4594 else if (attr == &dev_attr_sess_boot_target.attr)
4595 param = ISCSI_PARAM_BOOT_TARGET;
4596 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4597 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4598 else if (attr == &dev_attr_sess_discovery_session.attr)
4599 param = ISCSI_PARAM_DISCOVERY_SESS;
4600 else if (attr == &dev_attr_sess_portal_type.attr)
4601 param = ISCSI_PARAM_PORTAL_TYPE;
4602 else if (attr == &dev_attr_sess_chap_auth.attr)
4603 param = ISCSI_PARAM_CHAP_AUTH_EN;
4604 else if (attr == &dev_attr_sess_discovery_logout.attr)
4605 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4606 else if (attr == &dev_attr_sess_bidi_chap.attr)
4607 param = ISCSI_PARAM_BIDI_CHAP_EN;
4608 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4609 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4610 else if (attr == &dev_attr_sess_def_time2wait.attr)
4611 param = ISCSI_PARAM_DEF_TIME2WAIT;
4612 else if (attr == &dev_attr_sess_def_time2retain.attr)
4613 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4614 else if (attr == &dev_attr_sess_isid.attr)
4615 param = ISCSI_PARAM_ISID;
4616 else if (attr == &dev_attr_sess_tsid.attr)
4617 param = ISCSI_PARAM_TSID;
4618 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4619 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4620 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4621 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4622 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4623 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4624 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4625 return S_IRUGO | S_IWUSR;
4626 else if (attr == &dev_attr_priv_sess_state.attr)
4627 return S_IRUGO;
4628 else if (attr == &dev_attr_priv_sess_target_state.attr)
4629 return S_IRUGO;
4630 else if (attr == &dev_attr_priv_sess_creator.attr)
4631 return S_IRUGO;
4632 else if (attr == &dev_attr_priv_sess_target_id.attr)
4633 return S_IRUGO;
4634 else {
4635 WARN_ONCE(1, "Invalid session attr");
4636 return 0;
4637 }
4638
4639 return t->attr_is_visible(ISCSI_PARAM, param);
4640}
4641
4642static struct attribute_group iscsi_session_group = {
4643 .attrs = iscsi_session_attrs,
4644 .is_visible = iscsi_session_attr_is_visible,
4645};
4646
4647/*
4648 * iSCSI host attrs
4649 */
4650#define iscsi_host_attr_show(param) \
4651static ssize_t \
4652show_host_param_##param(struct device *dev, \
4653 struct device_attribute *attr, char *buf) \
4654{ \
4655 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4656 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4657 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4658}
4659
4660#define iscsi_host_attr(field, param) \
4661 iscsi_host_attr_show(param) \
4662static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4663 NULL);
4664
4665iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4666iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4667iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4668iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4669iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4670iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4671
4672static struct attribute *iscsi_host_attrs[] = {
4673 &dev_attr_host_netdev.attr,
4674 &dev_attr_host_hwaddress.attr,
4675 &dev_attr_host_ipaddress.attr,
4676 &dev_attr_host_initiatorname.attr,
4677 &dev_attr_host_port_state.attr,
4678 &dev_attr_host_port_speed.attr,
4679 NULL,
4680};
4681
4682static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4683 struct attribute *attr, int i)
4684{
4685 struct device *cdev = container_of(kobj, struct device, kobj);
4686 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4687 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4688 int param;
4689
4690 if (attr == &dev_attr_host_netdev.attr)
4691 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4692 else if (attr == &dev_attr_host_hwaddress.attr)
4693 param = ISCSI_HOST_PARAM_HWADDRESS;
4694 else if (attr == &dev_attr_host_ipaddress.attr)
4695 param = ISCSI_HOST_PARAM_IPADDRESS;
4696 else if (attr == &dev_attr_host_initiatorname.attr)
4697 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4698 else if (attr == &dev_attr_host_port_state.attr)
4699 param = ISCSI_HOST_PARAM_PORT_STATE;
4700 else if (attr == &dev_attr_host_port_speed.attr)
4701 param = ISCSI_HOST_PARAM_PORT_SPEED;
4702 else {
4703 WARN_ONCE(1, "Invalid host attr");
4704 return 0;
4705 }
4706
4707 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4708}
4709
4710static struct attribute_group iscsi_host_group = {
4711 .attrs = iscsi_host_attrs,
4712 .is_visible = iscsi_host_attr_is_visible,
4713};
4714
4715/* convert iscsi_port_speed values to ascii string name */
4716static const struct {
4717 enum iscsi_port_speed value;
4718 char *name;
4719} iscsi_port_speed_names[] = {
4720 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4721 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4722 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4723 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4724 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4725 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4726 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4727};
4728
4729char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4730{
4731 int i;
4732 char *speed = "Unknown!";
4733 struct iscsi_cls_host *ihost = shost->shost_data;
4734 uint32_t port_speed = ihost->port_speed;
4735
4736 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4737 if (iscsi_port_speed_names[i].value & port_speed) {
4738 speed = iscsi_port_speed_names[i].name;
4739 break;
4740 }
4741 }
4742 return speed;
4743}
4744EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4745
4746/* convert iscsi_port_state values to ascii string name */
4747static const struct {
4748 enum iscsi_port_state value;
4749 char *name;
4750} iscsi_port_state_names[] = {
4751 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4752 {ISCSI_PORT_STATE_UP, "LINK UP" },
4753};
4754
4755char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4756{
4757 int i;
4758 char *state = "Unknown!";
4759 struct iscsi_cls_host *ihost = shost->shost_data;
4760 uint32_t port_state = ihost->port_state;
4761
4762 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4763 if (iscsi_port_state_names[i].value & port_state) {
4764 state = iscsi_port_state_names[i].name;
4765 break;
4766 }
4767 }
4768 return state;
4769}
4770EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4771
4772static int iscsi_session_match(struct attribute_container *cont,
4773 struct device *dev)
4774{
4775 struct iscsi_cls_session *session;
4776 struct Scsi_Host *shost;
4777 struct iscsi_internal *priv;
4778
4779 if (!iscsi_is_session_dev(dev))
4780 return 0;
4781
4782 session = iscsi_dev_to_session(dev);
4783 shost = iscsi_session_to_shost(session);
4784 if (!shost->transportt)
4785 return 0;
4786
4787 priv = to_iscsi_internal(shost->transportt);
4788 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4789 return 0;
4790
4791 return &priv->session_cont.ac == cont;
4792}
4793
4794static int iscsi_conn_match(struct attribute_container *cont,
4795 struct device *dev)
4796{
4797 struct iscsi_cls_session *session;
4798 struct iscsi_cls_conn *conn;
4799 struct Scsi_Host *shost;
4800 struct iscsi_internal *priv;
4801
4802 if (!iscsi_is_conn_dev(dev))
4803 return 0;
4804
4805 conn = iscsi_dev_to_conn(dev);
4806 session = iscsi_dev_to_session(conn->dev.parent);
4807 shost = iscsi_session_to_shost(session);
4808
4809 if (!shost->transportt)
4810 return 0;
4811
4812 priv = to_iscsi_internal(shost->transportt);
4813 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4814 return 0;
4815
4816 return &priv->conn_cont.ac == cont;
4817}
4818
4819static int iscsi_host_match(struct attribute_container *cont,
4820 struct device *dev)
4821{
4822 struct Scsi_Host *shost;
4823 struct iscsi_internal *priv;
4824
4825 if (!scsi_is_host_device(dev))
4826 return 0;
4827
4828 shost = dev_to_shost(dev);
4829 if (!shost->transportt ||
4830 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4831 return 0;
4832
4833 priv = to_iscsi_internal(shost->transportt);
4834 return &priv->t.host_attrs.ac == cont;
4835}
4836
4837struct scsi_transport_template *
4838iscsi_register_transport(struct iscsi_transport *tt)
4839{
4840 struct iscsi_internal *priv;
4841 unsigned long flags;
4842 int err;
4843
4844 BUG_ON(!tt);
4845 WARN_ON(tt->ep_disconnect && !tt->unbind_conn);
4846
4847 priv = iscsi_if_transport_lookup(tt);
4848 if (priv)
4849 return NULL;
4850
4851 priv = kzalloc_obj(*priv);
4852 if (!priv)
4853 return NULL;
4854 INIT_LIST_HEAD(&priv->list);
4855 priv->iscsi_transport = tt;
4856 priv->t.user_scan = iscsi_user_scan;
4857
4858 priv->dev.class = &iscsi_transport_class;
4859 dev_set_name(&priv->dev, "%s", tt->name);
4860 err = device_register(&priv->dev);
4861 if (err)
4862 goto put_dev;
4863
4864 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4865 if (err)
4866 goto unregister_dev;
4867
4868 /* host parameters */
4869 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4870 priv->t.host_attrs.ac.match = iscsi_host_match;
4871 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4872 priv->t.host_size = sizeof(struct iscsi_cls_host);
4873 transport_container_register(&priv->t.host_attrs);
4874
4875 /* connection parameters */
4876 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4877 priv->conn_cont.ac.match = iscsi_conn_match;
4878 priv->conn_cont.ac.grp = &iscsi_conn_group;
4879 transport_container_register(&priv->conn_cont);
4880
4881 /* session parameters */
4882 priv->session_cont.ac.class = &iscsi_session_class.class;
4883 priv->session_cont.ac.match = iscsi_session_match;
4884 priv->session_cont.ac.grp = &iscsi_session_group;
4885 transport_container_register(&priv->session_cont);
4886
4887 spin_lock_irqsave(&iscsi_transport_lock, flags);
4888 list_add(&priv->list, &iscsi_transports);
4889 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4890
4891 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4892 return &priv->t;
4893
4894unregister_dev:
4895 device_unregister(&priv->dev);
4896 return NULL;
4897put_dev:
4898 put_device(&priv->dev);
4899 return NULL;
4900}
4901EXPORT_SYMBOL_GPL(iscsi_register_transport);
4902
4903void iscsi_unregister_transport(struct iscsi_transport *tt)
4904{
4905 struct iscsi_internal *priv;
4906 unsigned long flags;
4907
4908 BUG_ON(!tt);
4909
4910 mutex_lock(&rx_queue_mutex);
4911
4912 priv = iscsi_if_transport_lookup(tt);
4913 BUG_ON (!priv);
4914
4915 spin_lock_irqsave(&iscsi_transport_lock, flags);
4916 list_del(&priv->list);
4917 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4918
4919 transport_container_unregister(&priv->conn_cont);
4920 transport_container_unregister(&priv->session_cont);
4921 transport_container_unregister(&priv->t.host_attrs);
4922
4923 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4924 device_unregister(&priv->dev);
4925 mutex_unlock(&rx_queue_mutex);
4926}
4927EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4928
4929void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4930 struct device *dev, const char *fmt, ...)
4931{
4932 struct va_format vaf;
4933 va_list args;
4934
4935 va_start(args, fmt);
4936 vaf.fmt = fmt;
4937 vaf.va = &args;
4938 trace(dev, &vaf);
4939 va_end(args);
4940}
4941EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4942
4943static __init int iscsi_transport_init(void)
4944{
4945 int err;
4946 struct netlink_kernel_cfg cfg = {
4947 .groups = 1,
4948 .input = iscsi_if_rx,
4949 };
4950 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4951 ISCSI_TRANSPORT_VERSION);
4952
4953 atomic_set(&iscsi_session_nr, 0);
4954
4955 err = class_register(&iscsi_transport_class);
4956 if (err)
4957 return err;
4958
4959 err = class_register(&iscsi_endpoint_class);
4960 if (err)
4961 goto unregister_transport_class;
4962
4963 err = class_register(&iscsi_iface_class);
4964 if (err)
4965 goto unregister_endpoint_class;
4966
4967 err = transport_class_register(&iscsi_host_class);
4968 if (err)
4969 goto unregister_iface_class;
4970
4971 err = transport_class_register(&iscsi_connection_class);
4972 if (err)
4973 goto unregister_host_class;
4974
4975 err = transport_class_register(&iscsi_session_class);
4976 if (err)
4977 goto unregister_conn_class;
4978
4979 err = bus_register(&iscsi_flashnode_bus);
4980 if (err)
4981 goto unregister_session_class;
4982
4983 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4984 if (!nls) {
4985 err = -ENOBUFS;
4986 goto unregister_flashnode_bus;
4987 }
4988
4989 iscsi_conn_cleanup_workq = alloc_workqueue("%s",
4990 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0,
4991 "iscsi_conn_cleanup");
4992 if (!iscsi_conn_cleanup_workq) {
4993 err = -ENOMEM;
4994 goto release_nls;
4995 }
4996
4997 return 0;
4998
4999release_nls:
5000 netlink_kernel_release(nls);
5001unregister_flashnode_bus:
5002 bus_unregister(&iscsi_flashnode_bus);
5003unregister_session_class:
5004 transport_class_unregister(&iscsi_session_class);
5005unregister_conn_class:
5006 transport_class_unregister(&iscsi_connection_class);
5007unregister_host_class:
5008 transport_class_unregister(&iscsi_host_class);
5009unregister_iface_class:
5010 class_unregister(&iscsi_iface_class);
5011unregister_endpoint_class:
5012 class_unregister(&iscsi_endpoint_class);
5013unregister_transport_class:
5014 class_unregister(&iscsi_transport_class);
5015 return err;
5016}
5017
5018static void __exit iscsi_transport_exit(void)
5019{
5020 destroy_workqueue(iscsi_conn_cleanup_workq);
5021 netlink_kernel_release(nls);
5022 bus_unregister(&iscsi_flashnode_bus);
5023 transport_class_unregister(&iscsi_connection_class);
5024 transport_class_unregister(&iscsi_session_class);
5025 transport_class_unregister(&iscsi_host_class);
5026 class_unregister(&iscsi_endpoint_class);
5027 class_unregister(&iscsi_iface_class);
5028 class_unregister(&iscsi_transport_class);
5029}
5030
5031module_init(iscsi_transport_init);
5032module_exit(iscsi_transport_exit);
5033
5034MODULE_AUTHOR("Mike Christie <[email protected]>, "
5035 "Dmitry Yusupov <[email protected]>, "
5036 "Alex Aizman <[email protected]>");
5037MODULE_DESCRIPTION("iSCSI Transport Interface");
5038MODULE_LICENSE("GPL");
5039MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
5040MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);