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Merge tag 'linux_kselftest-fixes-6.12-rc2' of git://git.kernel.org/pub/scm/linux...
[linux-2.6-block.git] / drivers / scsi / scsi_transport_iscsi.c
... / ...
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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, 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, 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 == *((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, void *data,
1393 int (*fn)(struct device *dev, void *data))
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);
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
2125/**
2126 * iscsi_create_session - create iscsi class session
2127 * @shost: scsi host
2128 * @transport: iscsi transport
2129 * @dd_size: private driver data size
2130 * @target_id: which target
2131 *
2132 * This can be called from a LLD or iscsi_transport.
2133 */
2134struct iscsi_cls_session *
2135iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2136 int dd_size, unsigned int target_id)
2137{
2138 struct iscsi_cls_session *session;
2139
2140 session = iscsi_alloc_session(shost, transport, dd_size);
2141 if (!session)
2142 return NULL;
2143
2144 if (iscsi_add_session(session, target_id)) {
2145 iscsi_free_session(session);
2146 return NULL;
2147 }
2148 return session;
2149}
2150EXPORT_SYMBOL_GPL(iscsi_create_session);
2151
2152static void iscsi_conn_release(struct device *dev)
2153{
2154 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2155 struct device *parent = conn->dev.parent;
2156
2157 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2158 kfree(conn);
2159 put_device(parent);
2160}
2161
2162static int iscsi_is_conn_dev(const struct device *dev)
2163{
2164 return dev->release == iscsi_conn_release;
2165}
2166
2167static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2168{
2169 if (!iscsi_is_conn_dev(dev))
2170 return 0;
2171
2172 iscsi_remove_conn(iscsi_dev_to_conn(dev));
2173 return 0;
2174}
2175
2176void iscsi_remove_session(struct iscsi_cls_session *session)
2177{
2178 unsigned long flags;
2179 int err;
2180
2181 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2182
2183 spin_lock_irqsave(&sesslock, flags);
2184 if (!list_empty(&session->sess_list))
2185 list_del(&session->sess_list);
2186 spin_unlock_irqrestore(&sesslock, flags);
2187
2188 if (!cancel_work_sync(&session->block_work))
2189 cancel_delayed_work_sync(&session->recovery_work);
2190 cancel_work_sync(&session->unblock_work);
2191 /*
2192 * If we are blocked let commands flow again. The lld or iscsi
2193 * layer should set up the queuecommand to fail commands.
2194 * We assume that LLD will not be calling block/unblock while
2195 * removing the session.
2196 */
2197 spin_lock_irqsave(&session->lock, flags);
2198 session->state = ISCSI_SESSION_FREE;
2199 spin_unlock_irqrestore(&session->lock, flags);
2200
2201 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2202 /*
2203 * qla4xxx can perform it's own scans when it runs in kernel only
2204 * mode. Make sure to flush those scans.
2205 */
2206 flush_work(&session->scan_work);
2207 /* flush running unbind operations */
2208 flush_work(&session->unbind_work);
2209 __iscsi_unbind_session(&session->unbind_work);
2210
2211 /* hw iscsi may not have removed all connections from session */
2212 err = device_for_each_child(&session->dev, NULL,
2213 iscsi_iter_destroy_conn_fn);
2214 if (err)
2215 iscsi_cls_session_printk(KERN_ERR, session,
2216 "Could not delete all connections "
2217 "for session. Error %d.\n", err);
2218
2219 transport_unregister_device(&session->dev);
2220
2221 destroy_workqueue(session->workq);
2222
2223 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2224 device_del(&session->dev);
2225}
2226EXPORT_SYMBOL_GPL(iscsi_remove_session);
2227
2228static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag)
2229{
2230 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n");
2231
2232 switch (flag) {
2233 case STOP_CONN_RECOVER:
2234 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED);
2235 break;
2236 case STOP_CONN_TERM:
2237 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN);
2238 break;
2239 default:
2240 iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n",
2241 flag);
2242 return;
2243 }
2244
2245 conn->transport->stop_conn(conn, flag);
2246 ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n");
2247}
2248
2249static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active)
2250{
2251 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2252 struct iscsi_endpoint *ep;
2253
2254 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n");
2255 WRITE_ONCE(conn->state, ISCSI_CONN_FAILED);
2256
2257 if (!conn->ep || !session->transport->ep_disconnect)
2258 return;
2259
2260 ep = conn->ep;
2261 conn->ep = NULL;
2262
2263 session->transport->unbind_conn(conn, is_active);
2264 session->transport->ep_disconnect(ep);
2265 ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n");
2266}
2267
2268static void iscsi_if_disconnect_bound_ep(struct iscsi_cls_conn *conn,
2269 struct iscsi_endpoint *ep,
2270 bool is_active)
2271{
2272 /* Check if this was a conn error and the kernel took ownership */
2273 spin_lock_irq(&conn->lock);
2274 if (!test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
2275 spin_unlock_irq(&conn->lock);
2276 iscsi_ep_disconnect(conn, is_active);
2277 } else {
2278 spin_unlock_irq(&conn->lock);
2279 ISCSI_DBG_TRANS_CONN(conn, "flush kernel conn cleanup.\n");
2280 mutex_unlock(&conn->ep_mutex);
2281
2282 flush_work(&conn->cleanup_work);
2283 /*
2284 * Userspace is now done with the EP so we can release the ref
2285 * iscsi_cleanup_conn_work_fn took.
2286 */
2287 iscsi_put_endpoint(ep);
2288 mutex_lock(&conn->ep_mutex);
2289 }
2290}
2291
2292static int iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag)
2293{
2294 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n");
2295 /*
2296 * For offload, iscsid may not know about the ep like when iscsid is
2297 * restarted or for kernel based session shutdown iscsid is not even
2298 * up. For these cases, we do the disconnect now.
2299 */
2300 mutex_lock(&conn->ep_mutex);
2301 if (conn->ep)
2302 iscsi_if_disconnect_bound_ep(conn, conn->ep, true);
2303 mutex_unlock(&conn->ep_mutex);
2304
2305 /*
2306 * If this is a termination we have to call stop_conn with that flag
2307 * so the correct states get set. If we haven't run the work yet try to
2308 * avoid the extra run.
2309 */
2310 if (flag == STOP_CONN_TERM) {
2311 cancel_work_sync(&conn->cleanup_work);
2312 iscsi_stop_conn(conn, flag);
2313 } else {
2314 /*
2315 * Figure out if it was the kernel or userspace initiating this.
2316 */
2317 spin_lock_irq(&conn->lock);
2318 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
2319 spin_unlock_irq(&conn->lock);
2320 iscsi_stop_conn(conn, flag);
2321 } else {
2322 spin_unlock_irq(&conn->lock);
2323 ISCSI_DBG_TRANS_CONN(conn,
2324 "flush kernel conn cleanup.\n");
2325 flush_work(&conn->cleanup_work);
2326 }
2327 /*
2328 * Only clear for recovery to avoid extra cleanup runs during
2329 * termination.
2330 */
2331 spin_lock_irq(&conn->lock);
2332 clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags);
2333 spin_unlock_irq(&conn->lock);
2334 }
2335 ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n");
2336 return 0;
2337}
2338
2339static void iscsi_cleanup_conn_work_fn(struct work_struct *work)
2340{
2341 struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn,
2342 cleanup_work);
2343 struct iscsi_cls_session *session = iscsi_conn_to_session(conn);
2344
2345 mutex_lock(&conn->ep_mutex);
2346 /*
2347 * Get a ref to the ep, so we don't release its ID until after
2348 * userspace is done referencing it in iscsi_if_disconnect_bound_ep.
2349 */
2350 if (conn->ep)
2351 get_device(&conn->ep->dev);
2352 iscsi_ep_disconnect(conn, false);
2353
2354 if (system_state != SYSTEM_RUNNING) {
2355 /*
2356 * If the user has set up for the session to never timeout
2357 * then hang like they wanted. For all other cases fail right
2358 * away since userspace is not going to relogin.
2359 */
2360 if (session->recovery_tmo > 0)
2361 session->recovery_tmo = 0;
2362 }
2363
2364 iscsi_stop_conn(conn, STOP_CONN_RECOVER);
2365 mutex_unlock(&conn->ep_mutex);
2366 ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n");
2367}
2368
2369static int iscsi_iter_force_destroy_conn_fn(struct device *dev, void *data)
2370{
2371 struct iscsi_transport *transport;
2372 struct iscsi_cls_conn *conn;
2373
2374 if (!iscsi_is_conn_dev(dev))
2375 return 0;
2376
2377 conn = iscsi_dev_to_conn(dev);
2378 transport = conn->transport;
2379
2380 if (READ_ONCE(conn->state) != ISCSI_CONN_DOWN)
2381 iscsi_if_stop_conn(conn, STOP_CONN_TERM);
2382
2383 transport->destroy_conn(conn);
2384 return 0;
2385}
2386
2387/**
2388 * iscsi_force_destroy_session - destroy a session from the kernel
2389 * @session: session to destroy
2390 *
2391 * Force the destruction of a session from the kernel. This should only be
2392 * used when userspace is no longer running during system shutdown.
2393 */
2394void iscsi_force_destroy_session(struct iscsi_cls_session *session)
2395{
2396 struct iscsi_transport *transport = session->transport;
2397 unsigned long flags;
2398
2399 WARN_ON_ONCE(system_state == SYSTEM_RUNNING);
2400
2401 spin_lock_irqsave(&sesslock, flags);
2402 if (list_empty(&session->sess_list)) {
2403 spin_unlock_irqrestore(&sesslock, flags);
2404 /*
2405 * Conn/ep is already freed. Session is being torn down via
2406 * async path. For shutdown we don't care about it so return.
2407 */
2408 return;
2409 }
2410 spin_unlock_irqrestore(&sesslock, flags);
2411
2412 device_for_each_child(&session->dev, NULL,
2413 iscsi_iter_force_destroy_conn_fn);
2414 transport->destroy_session(session);
2415}
2416EXPORT_SYMBOL_GPL(iscsi_force_destroy_session);
2417
2418void iscsi_free_session(struct iscsi_cls_session *session)
2419{
2420 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2421 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2422 put_device(&session->dev);
2423}
2424EXPORT_SYMBOL_GPL(iscsi_free_session);
2425
2426/**
2427 * iscsi_alloc_conn - alloc iscsi class connection
2428 * @session: iscsi cls session
2429 * @dd_size: private driver data size
2430 * @cid: connection id
2431 */
2432struct iscsi_cls_conn *
2433iscsi_alloc_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2434{
2435 struct iscsi_transport *transport = session->transport;
2436 struct iscsi_cls_conn *conn;
2437
2438 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2439 if (!conn)
2440 return NULL;
2441 if (dd_size)
2442 conn->dd_data = &conn[1];
2443
2444 mutex_init(&conn->ep_mutex);
2445 spin_lock_init(&conn->lock);
2446 INIT_LIST_HEAD(&conn->conn_list);
2447 INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn);
2448 conn->transport = transport;
2449 conn->cid = cid;
2450 WRITE_ONCE(conn->state, ISCSI_CONN_DOWN);
2451
2452 /* this is released in the dev's release function */
2453 if (!get_device(&session->dev))
2454 goto free_conn;
2455
2456 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2457 device_initialize(&conn->dev);
2458 conn->dev.parent = &session->dev;
2459 conn->dev.release = iscsi_conn_release;
2460
2461 return conn;
2462
2463free_conn:
2464 kfree(conn);
2465 return NULL;
2466}
2467EXPORT_SYMBOL_GPL(iscsi_alloc_conn);
2468
2469/**
2470 * iscsi_add_conn - add iscsi class connection
2471 * @conn: iscsi cls connection
2472 *
2473 * This will expose iscsi_cls_conn to sysfs so make sure the related
2474 * resources for sysfs attributes are initialized before calling this.
2475 */
2476int iscsi_add_conn(struct iscsi_cls_conn *conn)
2477{
2478 int err;
2479 unsigned long flags;
2480 struct iscsi_cls_session *session = iscsi_dev_to_session(conn->dev.parent);
2481
2482 err = device_add(&conn->dev);
2483 if (err) {
2484 iscsi_cls_session_printk(KERN_ERR, session,
2485 "could not register connection's dev\n");
2486 return err;
2487 }
2488 err = transport_register_device(&conn->dev);
2489 if (err) {
2490 iscsi_cls_session_printk(KERN_ERR, session,
2491 "could not register transport's dev\n");
2492 device_del(&conn->dev);
2493 return err;
2494 }
2495
2496 spin_lock_irqsave(&connlock, flags);
2497 list_add(&conn->conn_list, &connlist);
2498 spin_unlock_irqrestore(&connlock, flags);
2499
2500 return 0;
2501}
2502EXPORT_SYMBOL_GPL(iscsi_add_conn);
2503
2504/**
2505 * iscsi_remove_conn - remove iscsi class connection from sysfs
2506 * @conn: iscsi cls connection
2507 *
2508 * Remove iscsi_cls_conn from sysfs, and wait for previous
2509 * read/write of iscsi_cls_conn's attributes in sysfs to finish.
2510 */
2511void iscsi_remove_conn(struct iscsi_cls_conn *conn)
2512{
2513 unsigned long flags;
2514
2515 spin_lock_irqsave(&connlock, flags);
2516 list_del(&conn->conn_list);
2517 spin_unlock_irqrestore(&connlock, flags);
2518
2519 transport_unregister_device(&conn->dev);
2520 device_del(&conn->dev);
2521}
2522EXPORT_SYMBOL_GPL(iscsi_remove_conn);
2523
2524void iscsi_put_conn(struct iscsi_cls_conn *conn)
2525{
2526 put_device(&conn->dev);
2527}
2528EXPORT_SYMBOL_GPL(iscsi_put_conn);
2529
2530void iscsi_get_conn(struct iscsi_cls_conn *conn)
2531{
2532 get_device(&conn->dev);
2533}
2534EXPORT_SYMBOL_GPL(iscsi_get_conn);
2535
2536/*
2537 * iscsi interface functions
2538 */
2539static struct iscsi_internal *
2540iscsi_if_transport_lookup(struct iscsi_transport *tt)
2541{
2542 struct iscsi_internal *priv;
2543 unsigned long flags;
2544
2545 spin_lock_irqsave(&iscsi_transport_lock, flags);
2546 list_for_each_entry(priv, &iscsi_transports, list) {
2547 if (tt == priv->iscsi_transport) {
2548 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2549 return priv;
2550 }
2551 }
2552 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2553 return NULL;
2554}
2555
2556static int
2557iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2558{
2559 return nlmsg_multicast(nls, skb, 0, group, gfp);
2560}
2561
2562static int
2563iscsi_unicast_skb(struct sk_buff *skb, u32 portid)
2564{
2565 return nlmsg_unicast(nls, skb, portid);
2566}
2567
2568int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2569 char *data, uint32_t data_size)
2570{
2571 struct nlmsghdr *nlh;
2572 struct sk_buff *skb;
2573 struct iscsi_uevent *ev;
2574 char *pdu;
2575 struct iscsi_internal *priv;
2576 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2577 data_size);
2578
2579 priv = iscsi_if_transport_lookup(conn->transport);
2580 if (!priv)
2581 return -EINVAL;
2582
2583 skb = alloc_skb(len, GFP_ATOMIC);
2584 if (!skb) {
2585 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2586 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2587 "control PDU: OOM\n");
2588 return -ENOMEM;
2589 }
2590
2591 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2592 ev = nlmsg_data(nlh);
2593 memset(ev, 0, sizeof(*ev));
2594 ev->transport_handle = iscsi_handle(conn->transport);
2595 ev->type = ISCSI_KEVENT_RECV_PDU;
2596 ev->r.recv_req.cid = conn->cid;
2597 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2598 pdu = (char*)ev + sizeof(*ev);
2599 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2600 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2601
2602 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2603}
2604EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2605
2606int iscsi_offload_mesg(struct Scsi_Host *shost,
2607 struct iscsi_transport *transport, uint32_t type,
2608 char *data, uint16_t data_size)
2609{
2610 struct nlmsghdr *nlh;
2611 struct sk_buff *skb;
2612 struct iscsi_uevent *ev;
2613 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2614
2615 skb = alloc_skb(len, GFP_ATOMIC);
2616 if (!skb) {
2617 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2618 return -ENOMEM;
2619 }
2620
2621 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2622 ev = nlmsg_data(nlh);
2623 memset(ev, 0, sizeof(*ev));
2624 ev->type = type;
2625 ev->transport_handle = iscsi_handle(transport);
2626 switch (type) {
2627 case ISCSI_KEVENT_PATH_REQ:
2628 ev->r.req_path.host_no = shost->host_no;
2629 break;
2630 case ISCSI_KEVENT_IF_DOWN:
2631 ev->r.notify_if_down.host_no = shost->host_no;
2632 break;
2633 }
2634
2635 memcpy((char *)ev + sizeof(*ev), data, data_size);
2636
2637 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2638}
2639EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2640
2641void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2642{
2643 struct nlmsghdr *nlh;
2644 struct sk_buff *skb;
2645 struct iscsi_uevent *ev;
2646 struct iscsi_internal *priv;
2647 int len = nlmsg_total_size(sizeof(*ev));
2648 unsigned long flags;
2649 int state;
2650
2651 spin_lock_irqsave(&conn->lock, flags);
2652 /*
2653 * Userspace will only do a stop call if we are at least bound. And, we
2654 * only need to do the in kernel cleanup if in the UP state so cmds can
2655 * be released to upper layers. If in other states just wait for
2656 * userspace to avoid races that can leave the cleanup_work queued.
2657 */
2658 state = READ_ONCE(conn->state);
2659 switch (state) {
2660 case ISCSI_CONN_BOUND:
2661 case ISCSI_CONN_UP:
2662 if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP,
2663 &conn->flags)) {
2664 queue_work(iscsi_conn_cleanup_workq,
2665 &conn->cleanup_work);
2666 }
2667 break;
2668 default:
2669 ISCSI_DBG_TRANS_CONN(conn, "Got conn error in state %d\n",
2670 state);
2671 break;
2672 }
2673 spin_unlock_irqrestore(&conn->lock, flags);
2674
2675 priv = iscsi_if_transport_lookup(conn->transport);
2676 if (!priv)
2677 return;
2678
2679 skb = alloc_skb(len, GFP_ATOMIC);
2680 if (!skb) {
2681 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2682 "conn error (%d)\n", error);
2683 return;
2684 }
2685
2686 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2687 ev = nlmsg_data(nlh);
2688 ev->transport_handle = iscsi_handle(conn->transport);
2689 ev->type = ISCSI_KEVENT_CONN_ERROR;
2690 ev->r.connerror.error = error;
2691 ev->r.connerror.cid = conn->cid;
2692 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2693
2694 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2695
2696 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2697 error);
2698}
2699EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2700
2701void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2702 enum iscsi_conn_state state)
2703{
2704 struct nlmsghdr *nlh;
2705 struct sk_buff *skb;
2706 struct iscsi_uevent *ev;
2707 struct iscsi_internal *priv;
2708 int len = nlmsg_total_size(sizeof(*ev));
2709
2710 priv = iscsi_if_transport_lookup(conn->transport);
2711 if (!priv)
2712 return;
2713
2714 skb = alloc_skb(len, GFP_ATOMIC);
2715 if (!skb) {
2716 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2717 "conn login (%d)\n", state);
2718 return;
2719 }
2720
2721 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2722 ev = nlmsg_data(nlh);
2723 ev->transport_handle = iscsi_handle(conn->transport);
2724 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2725 ev->r.conn_login.state = state;
2726 ev->r.conn_login.cid = conn->cid;
2727 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2728 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2729
2730 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2731 state);
2732}
2733EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2734
2735void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2736 enum iscsi_host_event_code code, uint32_t data_size,
2737 uint8_t *data)
2738{
2739 struct nlmsghdr *nlh;
2740 struct sk_buff *skb;
2741 struct iscsi_uevent *ev;
2742 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2743
2744 skb = alloc_skb(len, GFP_NOIO);
2745 if (!skb) {
2746 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2747 host_no, code);
2748 return;
2749 }
2750
2751 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2752 ev = nlmsg_data(nlh);
2753 ev->transport_handle = iscsi_handle(transport);
2754 ev->type = ISCSI_KEVENT_HOST_EVENT;
2755 ev->r.host_event.host_no = host_no;
2756 ev->r.host_event.code = code;
2757 ev->r.host_event.data_size = data_size;
2758
2759 if (data_size)
2760 memcpy((char *)ev + sizeof(*ev), data, data_size);
2761
2762 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2763}
2764EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2765
2766void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2767 uint32_t status, uint32_t pid, uint32_t data_size,
2768 uint8_t *data)
2769{
2770 struct nlmsghdr *nlh;
2771 struct sk_buff *skb;
2772 struct iscsi_uevent *ev;
2773 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2774
2775 skb = alloc_skb(len, GFP_NOIO);
2776 if (!skb) {
2777 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2778 return;
2779 }
2780
2781 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2782 ev = nlmsg_data(nlh);
2783 ev->transport_handle = iscsi_handle(transport);
2784 ev->type = ISCSI_KEVENT_PING_COMP;
2785 ev->r.ping_comp.host_no = host_no;
2786 ev->r.ping_comp.status = status;
2787 ev->r.ping_comp.pid = pid;
2788 ev->r.ping_comp.data_size = data_size;
2789 memcpy((char *)ev + sizeof(*ev), data, data_size);
2790
2791 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2792}
2793EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2794
2795static int
2796iscsi_if_send_reply(u32 portid, int type, void *payload, int size)
2797{
2798 struct sk_buff *skb;
2799 struct nlmsghdr *nlh;
2800 int len = nlmsg_total_size(size);
2801
2802 skb = alloc_skb(len, GFP_ATOMIC);
2803 if (!skb) {
2804 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2805 return -ENOMEM;
2806 }
2807
2808 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);
2809 memcpy(nlmsg_data(nlh), payload, size);
2810 return iscsi_unicast_skb(skb, portid);
2811}
2812
2813static int
2814iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2815{
2816 struct iscsi_uevent *ev = nlmsg_data(nlh);
2817 struct iscsi_stats *stats;
2818 struct sk_buff *skbstat;
2819 struct iscsi_cls_conn *conn;
2820 struct nlmsghdr *nlhstat;
2821 struct iscsi_uevent *evstat;
2822 struct iscsi_internal *priv;
2823 int len = nlmsg_total_size(sizeof(*ev) +
2824 sizeof(struct iscsi_stats) +
2825 sizeof(struct iscsi_stats_custom) *
2826 ISCSI_STATS_CUSTOM_MAX);
2827 int err = 0;
2828
2829 priv = iscsi_if_transport_lookup(transport);
2830 if (!priv)
2831 return -EINVAL;
2832
2833 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2834 if (!conn)
2835 return -EEXIST;
2836
2837 do {
2838 int actual_size;
2839
2840 skbstat = alloc_skb(len, GFP_ATOMIC);
2841 if (!skbstat) {
2842 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2843 "deliver stats: OOM\n");
2844 return -ENOMEM;
2845 }
2846
2847 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2848 (len - sizeof(*nlhstat)), 0);
2849 evstat = nlmsg_data(nlhstat);
2850 memset(evstat, 0, sizeof(*evstat));
2851 evstat->transport_handle = iscsi_handle(conn->transport);
2852 evstat->type = nlh->nlmsg_type;
2853 evstat->u.get_stats.cid =
2854 ev->u.get_stats.cid;
2855 evstat->u.get_stats.sid =
2856 ev->u.get_stats.sid;
2857 stats = (struct iscsi_stats *)
2858 ((char*)evstat + sizeof(*evstat));
2859 memset(stats, 0, sizeof(*stats));
2860
2861 transport->get_stats(conn, stats);
2862 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2863 sizeof(struct iscsi_stats) +
2864 sizeof(struct iscsi_stats_custom) *
2865 stats->custom_length);
2866 actual_size -= sizeof(*nlhstat);
2867 actual_size = nlmsg_msg_size(actual_size);
2868 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2869 nlhstat->nlmsg_len = actual_size;
2870
2871 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2872 GFP_ATOMIC);
2873 } while (err < 0 && err != -ECONNREFUSED);
2874
2875 return err;
2876}
2877
2878/**
2879 * iscsi_session_event - send session destr. completion event
2880 * @session: iscsi class session
2881 * @event: type of event
2882 */
2883int iscsi_session_event(struct iscsi_cls_session *session,
2884 enum iscsi_uevent_e event)
2885{
2886 struct iscsi_internal *priv;
2887 struct Scsi_Host *shost;
2888 struct iscsi_uevent *ev;
2889 struct sk_buff *skb;
2890 struct nlmsghdr *nlh;
2891 int rc, len = nlmsg_total_size(sizeof(*ev));
2892
2893 priv = iscsi_if_transport_lookup(session->transport);
2894 if (!priv)
2895 return -EINVAL;
2896 shost = iscsi_session_to_shost(session);
2897
2898 skb = alloc_skb(len, GFP_KERNEL);
2899 if (!skb) {
2900 iscsi_cls_session_printk(KERN_ERR, session,
2901 "Cannot notify userspace of session "
2902 "event %u\n", event);
2903 return -ENOMEM;
2904 }
2905
2906 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2907 ev = nlmsg_data(nlh);
2908 ev->transport_handle = iscsi_handle(session->transport);
2909
2910 ev->type = event;
2911 switch (event) {
2912 case ISCSI_KEVENT_DESTROY_SESSION:
2913 ev->r.d_session.host_no = shost->host_no;
2914 ev->r.d_session.sid = session->sid;
2915 break;
2916 case ISCSI_KEVENT_CREATE_SESSION:
2917 ev->r.c_session_ret.host_no = shost->host_no;
2918 ev->r.c_session_ret.sid = session->sid;
2919 break;
2920 case ISCSI_KEVENT_UNBIND_SESSION:
2921 ev->r.unbind_session.host_no = shost->host_no;
2922 ev->r.unbind_session.sid = session->sid;
2923 break;
2924 default:
2925 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2926 "%u.\n", event);
2927 kfree_skb(skb);
2928 return -EINVAL;
2929 }
2930
2931 /*
2932 * this will occur if the daemon is not up, so we just warn
2933 * the user and when the daemon is restarted it will handle it
2934 */
2935 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2936 if (rc == -ESRCH)
2937 iscsi_cls_session_printk(KERN_ERR, session,
2938 "Cannot notify userspace of session "
2939 "event %u. Check iscsi daemon\n",
2940 event);
2941
2942 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2943 event, rc);
2944 return rc;
2945}
2946EXPORT_SYMBOL_GPL(iscsi_session_event);
2947
2948static int
2949iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2950 struct iscsi_uevent *ev, pid_t pid,
2951 uint32_t initial_cmdsn, uint16_t cmds_max,
2952 uint16_t queue_depth)
2953{
2954 struct iscsi_transport *transport = priv->iscsi_transport;
2955 struct iscsi_cls_session *session;
2956 struct Scsi_Host *shost;
2957
2958 session = transport->create_session(ep, cmds_max, queue_depth,
2959 initial_cmdsn);
2960 if (!session)
2961 return -ENOMEM;
2962
2963 session->creator = pid;
2964 shost = iscsi_session_to_shost(session);
2965 ev->r.c_session_ret.host_no = shost->host_no;
2966 ev->r.c_session_ret.sid = session->sid;
2967 ISCSI_DBG_TRANS_SESSION(session,
2968 "Completed creating transport session\n");
2969 return 0;
2970}
2971
2972static int
2973iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2974{
2975 struct iscsi_cls_conn *conn;
2976 struct iscsi_cls_session *session;
2977
2978 session = iscsi_session_lookup(ev->u.c_conn.sid);
2979 if (!session) {
2980 printk(KERN_ERR "iscsi: invalid session %d.\n",
2981 ev->u.c_conn.sid);
2982 return -EINVAL;
2983 }
2984
2985 conn = transport->create_conn(session, ev->u.c_conn.cid);
2986 if (!conn) {
2987 iscsi_cls_session_printk(KERN_ERR, session,
2988 "couldn't create a new connection.");
2989 return -ENOMEM;
2990 }
2991
2992 ev->r.c_conn_ret.sid = session->sid;
2993 ev->r.c_conn_ret.cid = conn->cid;
2994
2995 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2996 return 0;
2997}
2998
2999static int
3000iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
3001{
3002 struct iscsi_cls_conn *conn;
3003
3004 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
3005 if (!conn)
3006 return -EINVAL;
3007
3008 ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n");
3009 flush_work(&conn->cleanup_work);
3010 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
3011
3012 if (transport->destroy_conn)
3013 transport->destroy_conn(conn);
3014 return 0;
3015}
3016
3017static int
3018iscsi_if_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen)
3019{
3020 char *data = (char*)ev + sizeof(*ev);
3021 struct iscsi_cls_conn *conn;
3022 struct iscsi_cls_session *session;
3023 int err = 0, value = 0, state;
3024
3025 if (ev->u.set_param.len > rlen ||
3026 ev->u.set_param.len > PAGE_SIZE)
3027 return -EINVAL;
3028
3029 session = iscsi_session_lookup(ev->u.set_param.sid);
3030 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
3031 if (!conn || !session)
3032 return -EINVAL;
3033
3034 /* data will be regarded as NULL-ended string, do length check */
3035 if (strlen(data) > ev->u.set_param.len)
3036 return -EINVAL;
3037
3038 switch (ev->u.set_param.param) {
3039 case ISCSI_PARAM_SESS_RECOVERY_TMO:
3040 sscanf(data, "%d", &value);
3041 if (!session->recovery_tmo_sysfs_override)
3042 session->recovery_tmo = value;
3043 break;
3044 default:
3045 state = READ_ONCE(conn->state);
3046 if (state == ISCSI_CONN_BOUND || state == ISCSI_CONN_UP) {
3047 err = transport->set_param(conn, ev->u.set_param.param,
3048 data, ev->u.set_param.len);
3049 } else {
3050 return -ENOTCONN;
3051 }
3052 }
3053
3054 return err;
3055}
3056
3057static int iscsi_if_ep_connect(struct iscsi_transport *transport,
3058 struct iscsi_uevent *ev, int msg_type)
3059{
3060 struct iscsi_endpoint *ep;
3061 struct sockaddr *dst_addr;
3062 struct Scsi_Host *shost = NULL;
3063 int non_blocking, err = 0;
3064
3065 if (!transport->ep_connect)
3066 return -EINVAL;
3067
3068 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
3069 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
3070 if (!shost) {
3071 printk(KERN_ERR "ep connect failed. Could not find "
3072 "host no %u\n",
3073 ev->u.ep_connect_through_host.host_no);
3074 return -ENODEV;
3075 }
3076 non_blocking = ev->u.ep_connect_through_host.non_blocking;
3077 } else
3078 non_blocking = ev->u.ep_connect.non_blocking;
3079
3080 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3081 ep = transport->ep_connect(shost, dst_addr, non_blocking);
3082 if (IS_ERR(ep)) {
3083 err = PTR_ERR(ep);
3084 goto release_host;
3085 }
3086
3087 ev->r.ep_connect_ret.handle = ep->id;
3088release_host:
3089 if (shost)
3090 scsi_host_put(shost);
3091 return err;
3092}
3093
3094static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
3095 u64 ep_handle)
3096{
3097 struct iscsi_cls_conn *conn;
3098 struct iscsi_endpoint *ep;
3099
3100 if (!transport->ep_disconnect)
3101 return -EINVAL;
3102
3103 ep = iscsi_lookup_endpoint(ep_handle);
3104 if (!ep)
3105 return -EINVAL;
3106
3107 conn = ep->conn;
3108 if (!conn) {
3109 /*
3110 * conn was not even bound yet, so we can't get iscsi conn
3111 * failures yet.
3112 */
3113 transport->ep_disconnect(ep);
3114 goto put_ep;
3115 }
3116
3117 mutex_lock(&conn->ep_mutex);
3118 iscsi_if_disconnect_bound_ep(conn, ep, false);
3119 mutex_unlock(&conn->ep_mutex);
3120put_ep:
3121 iscsi_put_endpoint(ep);
3122 return 0;
3123}
3124
3125static int
3126iscsi_if_transport_ep(struct iscsi_transport *transport,
3127 struct iscsi_uevent *ev, int msg_type, u32 rlen)
3128{
3129 struct iscsi_endpoint *ep;
3130 int rc = 0;
3131
3132 switch (msg_type) {
3133 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3134 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3135 if (rlen < sizeof(struct sockaddr))
3136 rc = -EINVAL;
3137 else
3138 rc = iscsi_if_ep_connect(transport, ev, msg_type);
3139 break;
3140 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3141 if (!transport->ep_poll)
3142 return -EINVAL;
3143
3144 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
3145 if (!ep)
3146 return -EINVAL;
3147
3148 ev->r.retcode = transport->ep_poll(ep,
3149 ev->u.ep_poll.timeout_ms);
3150 iscsi_put_endpoint(ep);
3151 break;
3152 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3153 rc = iscsi_if_ep_disconnect(transport,
3154 ev->u.ep_disconnect.ep_handle);
3155 break;
3156 }
3157 return rc;
3158}
3159
3160static int
3161iscsi_tgt_dscvr(struct iscsi_transport *transport,
3162 struct iscsi_uevent *ev, u32 rlen)
3163{
3164 struct Scsi_Host *shost;
3165 struct sockaddr *dst_addr;
3166 int err;
3167
3168 if (rlen < sizeof(*dst_addr))
3169 return -EINVAL;
3170
3171 if (!transport->tgt_dscvr)
3172 return -EINVAL;
3173
3174 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
3175 if (!shost) {
3176 printk(KERN_ERR "target discovery could not find host no %u\n",
3177 ev->u.tgt_dscvr.host_no);
3178 return -ENODEV;
3179 }
3180
3181
3182 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
3183 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
3184 ev->u.tgt_dscvr.enable, dst_addr);
3185 scsi_host_put(shost);
3186 return err;
3187}
3188
3189static int
3190iscsi_set_host_param(struct iscsi_transport *transport,
3191 struct iscsi_uevent *ev, u32 rlen)
3192{
3193 char *data = (char*)ev + sizeof(*ev);
3194 struct Scsi_Host *shost;
3195 int err;
3196
3197 if (!transport->set_host_param)
3198 return -ENOSYS;
3199
3200 if (ev->u.set_host_param.len > rlen ||
3201 ev->u.set_host_param.len > PAGE_SIZE)
3202 return -EINVAL;
3203
3204 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
3205 if (!shost) {
3206 printk(KERN_ERR "set_host_param could not find host no %u\n",
3207 ev->u.set_host_param.host_no);
3208 return -ENODEV;
3209 }
3210
3211 /* see similar check in iscsi_if_set_param() */
3212 if (strlen(data) > ev->u.set_host_param.len)
3213 return -EINVAL;
3214
3215 err = transport->set_host_param(shost, ev->u.set_host_param.param,
3216 data, ev->u.set_host_param.len);
3217 scsi_host_put(shost);
3218 return err;
3219}
3220
3221static int
3222iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen)
3223{
3224 struct Scsi_Host *shost;
3225 struct iscsi_path *params;
3226 int err;
3227
3228 if (rlen < sizeof(*params))
3229 return -EINVAL;
3230
3231 if (!transport->set_path)
3232 return -ENOSYS;
3233
3234 shost = scsi_host_lookup(ev->u.set_path.host_no);
3235 if (!shost) {
3236 printk(KERN_ERR "set path could not find host no %u\n",
3237 ev->u.set_path.host_no);
3238 return -ENODEV;
3239 }
3240
3241 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
3242 err = transport->set_path(shost, params);
3243
3244 scsi_host_put(shost);
3245 return err;
3246}
3247
3248static int iscsi_session_has_conns(int sid)
3249{
3250 struct iscsi_cls_conn *conn;
3251 unsigned long flags;
3252 int found = 0;
3253
3254 spin_lock_irqsave(&connlock, flags);
3255 list_for_each_entry(conn, &connlist, conn_list) {
3256 if (iscsi_conn_get_sid(conn) == sid) {
3257 found = 1;
3258 break;
3259 }
3260 }
3261 spin_unlock_irqrestore(&connlock, flags);
3262
3263 return found;
3264}
3265
3266static int
3267iscsi_set_iface_params(struct iscsi_transport *transport,
3268 struct iscsi_uevent *ev, uint32_t len)
3269{
3270 char *data = (char *)ev + sizeof(*ev);
3271 struct Scsi_Host *shost;
3272 int err;
3273
3274 if (!transport->set_iface_param)
3275 return -ENOSYS;
3276
3277 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
3278 if (!shost) {
3279 printk(KERN_ERR "set_iface_params could not find host no %u\n",
3280 ev->u.set_iface_params.host_no);
3281 return -ENODEV;
3282 }
3283
3284 err = transport->set_iface_param(shost, data, len);
3285 scsi_host_put(shost);
3286 return err;
3287}
3288
3289static int
3290iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev, u32 rlen)
3291{
3292 struct Scsi_Host *shost;
3293 struct sockaddr *dst_addr;
3294 int err;
3295
3296 if (rlen < sizeof(*dst_addr))
3297 return -EINVAL;
3298
3299 if (!transport->send_ping)
3300 return -ENOSYS;
3301
3302 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3303 if (!shost) {
3304 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3305 ev->u.iscsi_ping.host_no);
3306 return -ENODEV;
3307 }
3308
3309 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3310 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3311 ev->u.iscsi_ping.iface_type,
3312 ev->u.iscsi_ping.payload_size,
3313 ev->u.iscsi_ping.pid,
3314 dst_addr);
3315 scsi_host_put(shost);
3316 return err;
3317}
3318
3319static int
3320iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3321{
3322 struct iscsi_uevent *ev = nlmsg_data(nlh);
3323 struct Scsi_Host *shost = NULL;
3324 struct iscsi_chap_rec *chap_rec;
3325 struct iscsi_internal *priv;
3326 struct sk_buff *skbchap;
3327 struct nlmsghdr *nlhchap;
3328 struct iscsi_uevent *evchap;
3329 uint32_t chap_buf_size;
3330 int len, err = 0;
3331 char *buf;
3332
3333 if (!transport->get_chap)
3334 return -EINVAL;
3335
3336 priv = iscsi_if_transport_lookup(transport);
3337 if (!priv)
3338 return -EINVAL;
3339
3340 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3341 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3342
3343 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3344 if (!shost) {
3345 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
3346 __func__, ev->u.get_chap.host_no);
3347 return -ENODEV;
3348 }
3349
3350 do {
3351 int actual_size;
3352
3353 skbchap = alloc_skb(len, GFP_KERNEL);
3354 if (!skbchap) {
3355 printk(KERN_ERR "can not deliver chap: OOM\n");
3356 err = -ENOMEM;
3357 goto exit_get_chap;
3358 }
3359
3360 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3361 (len - sizeof(*nlhchap)), 0);
3362 evchap = nlmsg_data(nlhchap);
3363 memset(evchap, 0, sizeof(*evchap));
3364 evchap->transport_handle = iscsi_handle(transport);
3365 evchap->type = nlh->nlmsg_type;
3366 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3367 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3368 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3369 buf = (char *)evchap + sizeof(*evchap);
3370 memset(buf, 0, chap_buf_size);
3371
3372 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3373 &evchap->u.get_chap.num_entries, buf);
3374
3375 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3376 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3377 nlhchap->nlmsg_len = actual_size;
3378
3379 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3380 GFP_KERNEL);
3381 } while (err < 0 && err != -ECONNREFUSED);
3382
3383exit_get_chap:
3384 scsi_host_put(shost);
3385 return err;
3386}
3387
3388static int iscsi_set_chap(struct iscsi_transport *transport,
3389 struct iscsi_uevent *ev, uint32_t len)
3390{
3391 char *data = (char *)ev + sizeof(*ev);
3392 struct Scsi_Host *shost;
3393 int err = 0;
3394
3395 if (!transport->set_chap)
3396 return -ENOSYS;
3397
3398 shost = scsi_host_lookup(ev->u.set_path.host_no);
3399 if (!shost) {
3400 pr_err("%s could not find host no %u\n",
3401 __func__, ev->u.set_path.host_no);
3402 return -ENODEV;
3403 }
3404
3405 err = transport->set_chap(shost, data, len);
3406 scsi_host_put(shost);
3407 return err;
3408}
3409
3410static int iscsi_delete_chap(struct iscsi_transport *transport,
3411 struct iscsi_uevent *ev)
3412{
3413 struct Scsi_Host *shost;
3414 int err = 0;
3415
3416 if (!transport->delete_chap)
3417 return -ENOSYS;
3418
3419 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3420 if (!shost) {
3421 printk(KERN_ERR "%s could not find host no %u\n",
3422 __func__, ev->u.delete_chap.host_no);
3423 return -ENODEV;
3424 }
3425
3426 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3427 scsi_host_put(shost);
3428 return err;
3429}
3430
3431static const struct {
3432 enum iscsi_discovery_parent_type value;
3433 char *name;
3434} iscsi_discovery_parent_names[] = {
3435 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3436 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3437 {ISCSI_DISC_PARENT_ISNS, "isns" },
3438};
3439
3440char *iscsi_get_discovery_parent_name(int parent_type)
3441{
3442 int i;
3443 char *state = "Unknown!";
3444
3445 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3446 if (iscsi_discovery_parent_names[i].value & parent_type) {
3447 state = iscsi_discovery_parent_names[i].name;
3448 break;
3449 }
3450 }
3451 return state;
3452}
3453EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3454
3455static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3456 struct iscsi_uevent *ev, uint32_t len)
3457{
3458 char *data = (char *)ev + sizeof(*ev);
3459 struct Scsi_Host *shost;
3460 struct iscsi_bus_flash_session *fnode_sess;
3461 struct iscsi_bus_flash_conn *fnode_conn;
3462 struct device *dev;
3463 uint32_t idx;
3464 int err = 0;
3465
3466 if (!transport->set_flashnode_param) {
3467 err = -ENOSYS;
3468 goto exit_set_fnode;
3469 }
3470
3471 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3472 if (!shost) {
3473 pr_err("%s could not find host no %u\n",
3474 __func__, ev->u.set_flashnode.host_no);
3475 err = -ENODEV;
3476 goto exit_set_fnode;
3477 }
3478
3479 idx = ev->u.set_flashnode.flashnode_idx;
3480 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3481 if (!fnode_sess) {
3482 pr_err("%s could not find flashnode %u for host no %u\n",
3483 __func__, idx, ev->u.set_flashnode.host_no);
3484 err = -ENODEV;
3485 goto put_host;
3486 }
3487
3488 dev = iscsi_find_flashnode_conn(fnode_sess);
3489 if (!dev) {
3490 err = -ENODEV;
3491 goto put_sess;
3492 }
3493
3494 fnode_conn = iscsi_dev_to_flash_conn(dev);
3495 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3496 put_device(dev);
3497
3498put_sess:
3499 put_device(&fnode_sess->dev);
3500
3501put_host:
3502 scsi_host_put(shost);
3503
3504exit_set_fnode:
3505 return err;
3506}
3507
3508static int iscsi_new_flashnode(struct iscsi_transport *transport,
3509 struct iscsi_uevent *ev, uint32_t len)
3510{
3511 char *data = (char *)ev + sizeof(*ev);
3512 struct Scsi_Host *shost;
3513 int index;
3514 int err = 0;
3515
3516 if (!transport->new_flashnode) {
3517 err = -ENOSYS;
3518 goto exit_new_fnode;
3519 }
3520
3521 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3522 if (!shost) {
3523 pr_err("%s could not find host no %u\n",
3524 __func__, ev->u.new_flashnode.host_no);
3525 err = -ENODEV;
3526 goto put_host;
3527 }
3528
3529 index = transport->new_flashnode(shost, data, len);
3530
3531 if (index >= 0)
3532 ev->r.new_flashnode_ret.flashnode_idx = index;
3533 else
3534 err = -EIO;
3535
3536put_host:
3537 scsi_host_put(shost);
3538
3539exit_new_fnode:
3540 return err;
3541}
3542
3543static int iscsi_del_flashnode(struct iscsi_transport *transport,
3544 struct iscsi_uevent *ev)
3545{
3546 struct Scsi_Host *shost;
3547 struct iscsi_bus_flash_session *fnode_sess;
3548 uint32_t idx;
3549 int err = 0;
3550
3551 if (!transport->del_flashnode) {
3552 err = -ENOSYS;
3553 goto exit_del_fnode;
3554 }
3555
3556 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3557 if (!shost) {
3558 pr_err("%s could not find host no %u\n",
3559 __func__, ev->u.del_flashnode.host_no);
3560 err = -ENODEV;
3561 goto put_host;
3562 }
3563
3564 idx = ev->u.del_flashnode.flashnode_idx;
3565 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3566 if (!fnode_sess) {
3567 pr_err("%s could not find flashnode %u for host no %u\n",
3568 __func__, idx, ev->u.del_flashnode.host_no);
3569 err = -ENODEV;
3570 goto put_host;
3571 }
3572
3573 err = transport->del_flashnode(fnode_sess);
3574 put_device(&fnode_sess->dev);
3575
3576put_host:
3577 scsi_host_put(shost);
3578
3579exit_del_fnode:
3580 return err;
3581}
3582
3583static int iscsi_login_flashnode(struct iscsi_transport *transport,
3584 struct iscsi_uevent *ev)
3585{
3586 struct Scsi_Host *shost;
3587 struct iscsi_bus_flash_session *fnode_sess;
3588 struct iscsi_bus_flash_conn *fnode_conn;
3589 struct device *dev;
3590 uint32_t idx;
3591 int err = 0;
3592
3593 if (!transport->login_flashnode) {
3594 err = -ENOSYS;
3595 goto exit_login_fnode;
3596 }
3597
3598 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3599 if (!shost) {
3600 pr_err("%s could not find host no %u\n",
3601 __func__, ev->u.login_flashnode.host_no);
3602 err = -ENODEV;
3603 goto put_host;
3604 }
3605
3606 idx = ev->u.login_flashnode.flashnode_idx;
3607 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3608 if (!fnode_sess) {
3609 pr_err("%s could not find flashnode %u for host no %u\n",
3610 __func__, idx, ev->u.login_flashnode.host_no);
3611 err = -ENODEV;
3612 goto put_host;
3613 }
3614
3615 dev = iscsi_find_flashnode_conn(fnode_sess);
3616 if (!dev) {
3617 err = -ENODEV;
3618 goto put_sess;
3619 }
3620
3621 fnode_conn = iscsi_dev_to_flash_conn(dev);
3622 err = transport->login_flashnode(fnode_sess, fnode_conn);
3623 put_device(dev);
3624
3625put_sess:
3626 put_device(&fnode_sess->dev);
3627
3628put_host:
3629 scsi_host_put(shost);
3630
3631exit_login_fnode:
3632 return err;
3633}
3634
3635static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3636 struct iscsi_uevent *ev)
3637{
3638 struct Scsi_Host *shost;
3639 struct iscsi_bus_flash_session *fnode_sess;
3640 struct iscsi_bus_flash_conn *fnode_conn;
3641 struct device *dev;
3642 uint32_t idx;
3643 int err = 0;
3644
3645 if (!transport->logout_flashnode) {
3646 err = -ENOSYS;
3647 goto exit_logout_fnode;
3648 }
3649
3650 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3651 if (!shost) {
3652 pr_err("%s could not find host no %u\n",
3653 __func__, ev->u.logout_flashnode.host_no);
3654 err = -ENODEV;
3655 goto put_host;
3656 }
3657
3658 idx = ev->u.logout_flashnode.flashnode_idx;
3659 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3660 if (!fnode_sess) {
3661 pr_err("%s could not find flashnode %u for host no %u\n",
3662 __func__, idx, ev->u.logout_flashnode.host_no);
3663 err = -ENODEV;
3664 goto put_host;
3665 }
3666
3667 dev = iscsi_find_flashnode_conn(fnode_sess);
3668 if (!dev) {
3669 err = -ENODEV;
3670 goto put_sess;
3671 }
3672
3673 fnode_conn = iscsi_dev_to_flash_conn(dev);
3674
3675 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3676 put_device(dev);
3677
3678put_sess:
3679 put_device(&fnode_sess->dev);
3680
3681put_host:
3682 scsi_host_put(shost);
3683
3684exit_logout_fnode:
3685 return err;
3686}
3687
3688static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3689 struct iscsi_uevent *ev)
3690{
3691 struct Scsi_Host *shost;
3692 struct iscsi_cls_session *session;
3693 int err = 0;
3694
3695 if (!transport->logout_flashnode_sid) {
3696 err = -ENOSYS;
3697 goto exit_logout_sid;
3698 }
3699
3700 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3701 if (!shost) {
3702 pr_err("%s could not find host no %u\n",
3703 __func__, ev->u.logout_flashnode.host_no);
3704 err = -ENODEV;
3705 goto put_host;
3706 }
3707
3708 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3709 if (!session) {
3710 pr_err("%s could not find session id %u\n",
3711 __func__, ev->u.logout_flashnode_sid.sid);
3712 err = -EINVAL;
3713 goto put_host;
3714 }
3715
3716 err = transport->logout_flashnode_sid(session);
3717
3718put_host:
3719 scsi_host_put(shost);
3720
3721exit_logout_sid:
3722 return err;
3723}
3724
3725static int
3726iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3727{
3728 struct iscsi_uevent *ev = nlmsg_data(nlh);
3729 struct Scsi_Host *shost = NULL;
3730 struct iscsi_internal *priv;
3731 struct sk_buff *skbhost_stats;
3732 struct nlmsghdr *nlhhost_stats;
3733 struct iscsi_uevent *evhost_stats;
3734 int host_stats_size = 0;
3735 int len, err = 0;
3736 char *buf;
3737
3738 if (!transport->get_host_stats)
3739 return -ENOSYS;
3740
3741 priv = iscsi_if_transport_lookup(transport);
3742 if (!priv)
3743 return -EINVAL;
3744
3745 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3746 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3747
3748 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3749 if (!shost) {
3750 pr_err("%s: failed. Could not find host no %u\n",
3751 __func__, ev->u.get_host_stats.host_no);
3752 return -ENODEV;
3753 }
3754
3755 do {
3756 int actual_size;
3757
3758 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3759 if (!skbhost_stats) {
3760 pr_err("cannot deliver host stats: OOM\n");
3761 err = -ENOMEM;
3762 goto exit_host_stats;
3763 }
3764
3765 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3766 (len - sizeof(*nlhhost_stats)), 0);
3767 evhost_stats = nlmsg_data(nlhhost_stats);
3768 memset(evhost_stats, 0, sizeof(*evhost_stats));
3769 evhost_stats->transport_handle = iscsi_handle(transport);
3770 evhost_stats->type = nlh->nlmsg_type;
3771 evhost_stats->u.get_host_stats.host_no =
3772 ev->u.get_host_stats.host_no;
3773 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3774 memset(buf, 0, host_stats_size);
3775
3776 err = transport->get_host_stats(shost, buf, host_stats_size);
3777 if (err) {
3778 kfree_skb(skbhost_stats);
3779 goto exit_host_stats;
3780 }
3781
3782 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3783 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3784 nlhhost_stats->nlmsg_len = actual_size;
3785
3786 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3787 GFP_KERNEL);
3788 } while (err < 0 && err != -ECONNREFUSED);
3789
3790exit_host_stats:
3791 scsi_host_put(shost);
3792 return err;
3793}
3794
3795static int iscsi_if_transport_conn(struct iscsi_transport *transport,
3796 struct nlmsghdr *nlh, u32 pdu_len)
3797{
3798 struct iscsi_uevent *ev = nlmsg_data(nlh);
3799 struct iscsi_cls_session *session;
3800 struct iscsi_cls_conn *conn = NULL;
3801 struct iscsi_endpoint *ep;
3802 int err = 0;
3803
3804 switch (nlh->nlmsg_type) {
3805 case ISCSI_UEVENT_CREATE_CONN:
3806 return iscsi_if_create_conn(transport, ev);
3807 case ISCSI_UEVENT_DESTROY_CONN:
3808 return iscsi_if_destroy_conn(transport, ev);
3809 case ISCSI_UEVENT_STOP_CONN:
3810 conn = iscsi_conn_lookup(ev->u.stop_conn.sid,
3811 ev->u.stop_conn.cid);
3812 if (!conn)
3813 return -EINVAL;
3814
3815 return iscsi_if_stop_conn(conn, ev->u.stop_conn.flag);
3816 }
3817
3818 /*
3819 * The following cmds need to be run under the ep_mutex so in kernel
3820 * conn cleanup (ep_disconnect + unbind and conn) is not done while
3821 * these are running. They also must not run if we have just run a conn
3822 * cleanup because they would set the state in a way that might allow
3823 * IO or send IO themselves.
3824 */
3825 switch (nlh->nlmsg_type) {
3826 case ISCSI_UEVENT_START_CONN:
3827 conn = iscsi_conn_lookup(ev->u.start_conn.sid,
3828 ev->u.start_conn.cid);
3829 break;
3830 case ISCSI_UEVENT_BIND_CONN:
3831 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3832 break;
3833 case ISCSI_UEVENT_SEND_PDU:
3834 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3835 break;
3836 }
3837
3838 if (!conn)
3839 return -EINVAL;
3840
3841 mutex_lock(&conn->ep_mutex);
3842 spin_lock_irq(&conn->lock);
3843 if (test_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) {
3844 spin_unlock_irq(&conn->lock);
3845 mutex_unlock(&conn->ep_mutex);
3846 ev->r.retcode = -ENOTCONN;
3847 return 0;
3848 }
3849 spin_unlock_irq(&conn->lock);
3850
3851 switch (nlh->nlmsg_type) {
3852 case ISCSI_UEVENT_BIND_CONN:
3853 session = iscsi_session_lookup(ev->u.b_conn.sid);
3854 if (!session) {
3855 err = -EINVAL;
3856 break;
3857 }
3858
3859 ev->r.retcode = transport->bind_conn(session, conn,
3860 ev->u.b_conn.transport_eph,
3861 ev->u.b_conn.is_leading);
3862 if (!ev->r.retcode)
3863 WRITE_ONCE(conn->state, ISCSI_CONN_BOUND);
3864
3865 if (ev->r.retcode || !transport->ep_connect)
3866 break;
3867
3868 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3869 if (ep) {
3870 ep->conn = conn;
3871 conn->ep = ep;
3872 iscsi_put_endpoint(ep);
3873 } else {
3874 err = -ENOTCONN;
3875 iscsi_cls_conn_printk(KERN_ERR, conn,
3876 "Could not set ep conn binding\n");
3877 }
3878 break;
3879 case ISCSI_UEVENT_START_CONN:
3880 ev->r.retcode = transport->start_conn(conn);
3881 if (!ev->r.retcode)
3882 WRITE_ONCE(conn->state, ISCSI_CONN_UP);
3883
3884 break;
3885 case ISCSI_UEVENT_SEND_PDU:
3886 if ((ev->u.send_pdu.hdr_size > pdu_len) ||
3887 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {
3888 err = -EINVAL;
3889 break;
3890 }
3891
3892 ev->r.retcode = transport->send_pdu(conn,
3893 (struct iscsi_hdr *)((char *)ev + sizeof(*ev)),
3894 (char *)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3895 ev->u.send_pdu.data_size);
3896 break;
3897 default:
3898 err = -ENOSYS;
3899 }
3900
3901 mutex_unlock(&conn->ep_mutex);
3902 return err;
3903}
3904
3905static int
3906iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3907{
3908 int err = 0;
3909 u32 portid;
3910 struct iscsi_uevent *ev = nlmsg_data(nlh);
3911 struct iscsi_transport *transport = NULL;
3912 struct iscsi_internal *priv;
3913 struct iscsi_cls_session *session;
3914 struct iscsi_endpoint *ep = NULL;
3915 u32 rlen;
3916
3917 if (!netlink_capable(skb, CAP_SYS_ADMIN))
3918 return -EPERM;
3919
3920 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3921 *group = ISCSI_NL_GRP_UIP;
3922 else
3923 *group = ISCSI_NL_GRP_ISCSID;
3924
3925 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3926 if (!priv)
3927 return -EINVAL;
3928 transport = priv->iscsi_transport;
3929
3930 if (!try_module_get(transport->owner))
3931 return -EINVAL;
3932
3933 portid = NETLINK_CB(skb).portid;
3934
3935 /*
3936 * Even though the remaining payload may not be regarded as nlattr,
3937 * (like address or something else), calculate the remaining length
3938 * here to ease following length checks.
3939 */
3940 rlen = nlmsg_attrlen(nlh, sizeof(*ev));
3941
3942 switch (nlh->nlmsg_type) {
3943 case ISCSI_UEVENT_CREATE_SESSION:
3944 err = iscsi_if_create_session(priv, ep, ev,
3945 portid,
3946 ev->u.c_session.initial_cmdsn,
3947 ev->u.c_session.cmds_max,
3948 ev->u.c_session.queue_depth);
3949 break;
3950 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3951 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3952 if (!ep) {
3953 err = -EINVAL;
3954 break;
3955 }
3956
3957 err = iscsi_if_create_session(priv, ep, ev,
3958 portid,
3959 ev->u.c_bound_session.initial_cmdsn,
3960 ev->u.c_bound_session.cmds_max,
3961 ev->u.c_bound_session.queue_depth);
3962 iscsi_put_endpoint(ep);
3963 break;
3964 case ISCSI_UEVENT_DESTROY_SESSION:
3965 session = iscsi_session_lookup(ev->u.d_session.sid);
3966 if (!session)
3967 err = -EINVAL;
3968 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3969 err = -EBUSY;
3970 else
3971 transport->destroy_session(session);
3972 break;
3973 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:
3974 session = iscsi_session_lookup(ev->u.d_session.sid);
3975 if (!session)
3976 err = -EINVAL;
3977 else if (iscsi_session_has_conns(ev->u.d_session.sid))
3978 err = -EBUSY;
3979 else {
3980 unsigned long flags;
3981
3982 /* Prevent this session from being found again */
3983 spin_lock_irqsave(&sesslock, flags);
3984 list_del_init(&session->sess_list);
3985 spin_unlock_irqrestore(&sesslock, flags);
3986
3987 queue_work(system_unbound_wq, &session->destroy_work);
3988 }
3989 break;
3990 case ISCSI_UEVENT_UNBIND_SESSION:
3991 session = iscsi_session_lookup(ev->u.d_session.sid);
3992 if (session)
3993 queue_work(session->workq, &session->unbind_work);
3994 else
3995 err = -EINVAL;
3996 break;
3997 case ISCSI_UEVENT_SET_PARAM:
3998 err = iscsi_if_set_param(transport, ev, rlen);
3999 break;
4000 case ISCSI_UEVENT_CREATE_CONN:
4001 case ISCSI_UEVENT_DESTROY_CONN:
4002 case ISCSI_UEVENT_STOP_CONN:
4003 case ISCSI_UEVENT_START_CONN:
4004 case ISCSI_UEVENT_BIND_CONN:
4005 case ISCSI_UEVENT_SEND_PDU:
4006 err = iscsi_if_transport_conn(transport, nlh, rlen);
4007 break;
4008 case ISCSI_UEVENT_GET_STATS:
4009 err = iscsi_if_get_stats(transport, nlh);
4010 break;
4011 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
4012 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
4013 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
4014 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
4015 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type, rlen);
4016 break;
4017 case ISCSI_UEVENT_TGT_DSCVR:
4018 err = iscsi_tgt_dscvr(transport, ev, rlen);
4019 break;
4020 case ISCSI_UEVENT_SET_HOST_PARAM:
4021 err = iscsi_set_host_param(transport, ev, rlen);
4022 break;
4023 case ISCSI_UEVENT_PATH_UPDATE:
4024 err = iscsi_set_path(transport, ev, rlen);
4025 break;
4026 case ISCSI_UEVENT_SET_IFACE_PARAMS:
4027 err = iscsi_set_iface_params(transport, ev, rlen);
4028 break;
4029 case ISCSI_UEVENT_PING:
4030 err = iscsi_send_ping(transport, ev, rlen);
4031 break;
4032 case ISCSI_UEVENT_GET_CHAP:
4033 err = iscsi_get_chap(transport, nlh);
4034 break;
4035 case ISCSI_UEVENT_DELETE_CHAP:
4036 err = iscsi_delete_chap(transport, ev);
4037 break;
4038 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
4039 err = iscsi_set_flashnode_param(transport, ev, rlen);
4040 break;
4041 case ISCSI_UEVENT_NEW_FLASHNODE:
4042 err = iscsi_new_flashnode(transport, ev, rlen);
4043 break;
4044 case ISCSI_UEVENT_DEL_FLASHNODE:
4045 err = iscsi_del_flashnode(transport, ev);
4046 break;
4047 case ISCSI_UEVENT_LOGIN_FLASHNODE:
4048 err = iscsi_login_flashnode(transport, ev);
4049 break;
4050 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
4051 err = iscsi_logout_flashnode(transport, ev);
4052 break;
4053 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
4054 err = iscsi_logout_flashnode_sid(transport, ev);
4055 break;
4056 case ISCSI_UEVENT_SET_CHAP:
4057 err = iscsi_set_chap(transport, ev, rlen);
4058 break;
4059 case ISCSI_UEVENT_GET_HOST_STATS:
4060 err = iscsi_get_host_stats(transport, nlh);
4061 break;
4062 default:
4063 err = -ENOSYS;
4064 break;
4065 }
4066
4067 module_put(transport->owner);
4068 return err;
4069}
4070
4071/*
4072 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
4073 * Malformed skbs with wrong lengths or invalid creds are not processed.
4074 */
4075static void
4076iscsi_if_rx(struct sk_buff *skb)
4077{
4078 u32 portid = NETLINK_CB(skb).portid;
4079
4080 mutex_lock(&rx_queue_mutex);
4081 while (skb->len >= NLMSG_HDRLEN) {
4082 int err;
4083 uint32_t rlen;
4084 struct nlmsghdr *nlh;
4085 struct iscsi_uevent *ev;
4086 uint32_t group;
4087 int retries = ISCSI_SEND_MAX_ALLOWED;
4088
4089 nlh = nlmsg_hdr(skb);
4090 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||
4091 skb->len < nlh->nlmsg_len) {
4092 break;
4093 }
4094
4095 ev = nlmsg_data(nlh);
4096 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
4097 if (rlen > skb->len)
4098 rlen = skb->len;
4099
4100 err = iscsi_if_recv_msg(skb, nlh, &group);
4101 if (err) {
4102 ev->type = ISCSI_KEVENT_IF_ERROR;
4103 ev->iferror = err;
4104 }
4105 do {
4106 /*
4107 * special case for GET_STATS:
4108 * on success - sending reply and stats from
4109 * inside of if_recv_msg(),
4110 * on error - fall through.
4111 */
4112 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
4113 break;
4114 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
4115 break;
4116 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,
4117 ev, sizeof(*ev));
4118 if (err == -EAGAIN && --retries < 0) {
4119 printk(KERN_WARNING "Send reply failed, error %d\n", err);
4120 break;
4121 }
4122 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
4123 skb_pull(skb, rlen);
4124 }
4125 mutex_unlock(&rx_queue_mutex);
4126}
4127
4128#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
4129struct device_attribute dev_attr_##_prefix##_##_name = \
4130 __ATTR(_name,_mode,_show,_store)
4131
4132/*
4133 * iSCSI connection attrs
4134 */
4135#define iscsi_conn_attr_show(param) \
4136static ssize_t \
4137show_conn_param_##param(struct device *dev, \
4138 struct device_attribute *attr, char *buf) \
4139{ \
4140 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
4141 struct iscsi_transport *t = conn->transport; \
4142 return t->get_conn_param(conn, param, buf); \
4143}
4144
4145#define iscsi_conn_attr(field, param) \
4146 iscsi_conn_attr_show(param) \
4147static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
4148 NULL);
4149
4150iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
4151iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
4152iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
4153iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
4154iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
4155iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
4156iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
4157iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
4158iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
4159iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
4160iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
4161iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
4162iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
4163iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
4164iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
4165iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
4166iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
4167iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
4168iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
4169iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
4170iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
4171iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
4172iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
4173iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
4174iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
4175iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
4176iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
4177iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
4178
4179static const char *const connection_state_names[] = {
4180 [ISCSI_CONN_UP] = "up",
4181 [ISCSI_CONN_DOWN] = "down",
4182 [ISCSI_CONN_FAILED] = "failed",
4183 [ISCSI_CONN_BOUND] = "bound"
4184};
4185
4186static ssize_t show_conn_state(struct device *dev,
4187 struct device_attribute *attr, char *buf)
4188{
4189 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);
4190 const char *state = "unknown";
4191 int conn_state = READ_ONCE(conn->state);
4192
4193 if (conn_state >= 0 &&
4194 conn_state < ARRAY_SIZE(connection_state_names))
4195 state = connection_state_names[conn_state];
4196
4197 return sysfs_emit(buf, "%s\n", state);
4198}
4199static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
4200 NULL);
4201
4202#define iscsi_conn_ep_attr_show(param) \
4203static ssize_t show_conn_ep_param_##param(struct device *dev, \
4204 struct device_attribute *attr,\
4205 char *buf) \
4206{ \
4207 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
4208 struct iscsi_transport *t = conn->transport; \
4209 struct iscsi_endpoint *ep; \
4210 ssize_t rc; \
4211 \
4212 /* \
4213 * Need to make sure ep_disconnect does not free the LLD's \
4214 * interconnect resources while we are trying to read them. \
4215 */ \
4216 mutex_lock(&conn->ep_mutex); \
4217 ep = conn->ep; \
4218 if (!ep && t->ep_connect) { \
4219 mutex_unlock(&conn->ep_mutex); \
4220 return -ENOTCONN; \
4221 } \
4222 \
4223 if (ep) \
4224 rc = t->get_ep_param(ep, param, buf); \
4225 else \
4226 rc = t->get_conn_param(conn, param, buf); \
4227 mutex_unlock(&conn->ep_mutex); \
4228 return rc; \
4229}
4230
4231#define iscsi_conn_ep_attr(field, param) \
4232 iscsi_conn_ep_attr_show(param) \
4233static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
4234 show_conn_ep_param_##param, NULL);
4235
4236iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
4237iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
4238
4239static struct attribute *iscsi_conn_attrs[] = {
4240 &dev_attr_conn_max_recv_dlength.attr,
4241 &dev_attr_conn_max_xmit_dlength.attr,
4242 &dev_attr_conn_header_digest.attr,
4243 &dev_attr_conn_data_digest.attr,
4244 &dev_attr_conn_ifmarker.attr,
4245 &dev_attr_conn_ofmarker.attr,
4246 &dev_attr_conn_address.attr,
4247 &dev_attr_conn_port.attr,
4248 &dev_attr_conn_exp_statsn.attr,
4249 &dev_attr_conn_persistent_address.attr,
4250 &dev_attr_conn_persistent_port.attr,
4251 &dev_attr_conn_ping_tmo.attr,
4252 &dev_attr_conn_recv_tmo.attr,
4253 &dev_attr_conn_local_port.attr,
4254 &dev_attr_conn_statsn.attr,
4255 &dev_attr_conn_keepalive_tmo.attr,
4256 &dev_attr_conn_max_segment_size.attr,
4257 &dev_attr_conn_tcp_timestamp_stat.attr,
4258 &dev_attr_conn_tcp_wsf_disable.attr,
4259 &dev_attr_conn_tcp_nagle_disable.attr,
4260 &dev_attr_conn_tcp_timer_scale.attr,
4261 &dev_attr_conn_tcp_timestamp_enable.attr,
4262 &dev_attr_conn_fragment_disable.attr,
4263 &dev_attr_conn_ipv4_tos.attr,
4264 &dev_attr_conn_ipv6_traffic_class.attr,
4265 &dev_attr_conn_ipv6_flow_label.attr,
4266 &dev_attr_conn_is_fw_assigned_ipv6.attr,
4267 &dev_attr_conn_tcp_xmit_wsf.attr,
4268 &dev_attr_conn_tcp_recv_wsf.attr,
4269 &dev_attr_conn_local_ipaddr.attr,
4270 &dev_attr_conn_state.attr,
4271 NULL,
4272};
4273
4274static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
4275 struct attribute *attr, int i)
4276{
4277 struct device *cdev = container_of(kobj, struct device, kobj);
4278 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
4279 struct iscsi_transport *t = conn->transport;
4280 int param;
4281
4282 if (attr == &dev_attr_conn_max_recv_dlength.attr)
4283 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
4284 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
4285 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
4286 else if (attr == &dev_attr_conn_header_digest.attr)
4287 param = ISCSI_PARAM_HDRDGST_EN;
4288 else if (attr == &dev_attr_conn_data_digest.attr)
4289 param = ISCSI_PARAM_DATADGST_EN;
4290 else if (attr == &dev_attr_conn_ifmarker.attr)
4291 param = ISCSI_PARAM_IFMARKER_EN;
4292 else if (attr == &dev_attr_conn_ofmarker.attr)
4293 param = ISCSI_PARAM_OFMARKER_EN;
4294 else if (attr == &dev_attr_conn_address.attr)
4295 param = ISCSI_PARAM_CONN_ADDRESS;
4296 else if (attr == &dev_attr_conn_port.attr)
4297 param = ISCSI_PARAM_CONN_PORT;
4298 else if (attr == &dev_attr_conn_exp_statsn.attr)
4299 param = ISCSI_PARAM_EXP_STATSN;
4300 else if (attr == &dev_attr_conn_persistent_address.attr)
4301 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
4302 else if (attr == &dev_attr_conn_persistent_port.attr)
4303 param = ISCSI_PARAM_PERSISTENT_PORT;
4304 else if (attr == &dev_attr_conn_ping_tmo.attr)
4305 param = ISCSI_PARAM_PING_TMO;
4306 else if (attr == &dev_attr_conn_recv_tmo.attr)
4307 param = ISCSI_PARAM_RECV_TMO;
4308 else if (attr == &dev_attr_conn_local_port.attr)
4309 param = ISCSI_PARAM_LOCAL_PORT;
4310 else if (attr == &dev_attr_conn_statsn.attr)
4311 param = ISCSI_PARAM_STATSN;
4312 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
4313 param = ISCSI_PARAM_KEEPALIVE_TMO;
4314 else if (attr == &dev_attr_conn_max_segment_size.attr)
4315 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
4316 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
4317 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
4318 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
4319 param = ISCSI_PARAM_TCP_WSF_DISABLE;
4320 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
4321 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
4322 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
4323 param = ISCSI_PARAM_TCP_TIMER_SCALE;
4324 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
4325 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
4326 else if (attr == &dev_attr_conn_fragment_disable.attr)
4327 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
4328 else if (attr == &dev_attr_conn_ipv4_tos.attr)
4329 param = ISCSI_PARAM_IPV4_TOS;
4330 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
4331 param = ISCSI_PARAM_IPV6_TC;
4332 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
4333 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
4334 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
4335 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
4336 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
4337 param = ISCSI_PARAM_TCP_XMIT_WSF;
4338 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
4339 param = ISCSI_PARAM_TCP_RECV_WSF;
4340 else if (attr == &dev_attr_conn_local_ipaddr.attr)
4341 param = ISCSI_PARAM_LOCAL_IPADDR;
4342 else if (attr == &dev_attr_conn_state.attr)
4343 return S_IRUGO;
4344 else {
4345 WARN_ONCE(1, "Invalid conn attr");
4346 return 0;
4347 }
4348
4349 return t->attr_is_visible(ISCSI_PARAM, param);
4350}
4351
4352static struct attribute_group iscsi_conn_group = {
4353 .attrs = iscsi_conn_attrs,
4354 .is_visible = iscsi_conn_attr_is_visible,
4355};
4356
4357/*
4358 * iSCSI session attrs
4359 */
4360#define iscsi_session_attr_show(param, perm) \
4361static ssize_t \
4362show_session_param_##param(struct device *dev, \
4363 struct device_attribute *attr, char *buf) \
4364{ \
4365 struct iscsi_cls_session *session = \
4366 iscsi_dev_to_session(dev->parent); \
4367 struct iscsi_transport *t = session->transport; \
4368 \
4369 if (perm && !capable(CAP_SYS_ADMIN)) \
4370 return -EACCES; \
4371 return t->get_session_param(session, param, buf); \
4372}
4373
4374#define iscsi_session_attr(field, param, perm) \
4375 iscsi_session_attr_show(param, perm) \
4376static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
4377 NULL);
4378iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
4379iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
4380iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
4381iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
4382iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
4383iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
4384iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
4385iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
4386iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
4387iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
4388iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
4389iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
4390iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
4391iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
4392iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
4393iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4394iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
4395iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
4396iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
4397iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
4398iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
4399iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
4400iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
4401iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
4402iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
4403iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
4404iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
4405iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
4406iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
4407iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
4408iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
4409iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
4410iscsi_session_attr(discovery_auth_optional,
4411 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
4412iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
4413iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
4414iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
4415iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
4416iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
4417iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
4418iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
4419
4420static ssize_t
4421show_priv_session_target_state(struct device *dev, struct device_attribute *attr,
4422 char *buf)
4423{
4424 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4425
4426 return sysfs_emit(buf, "%s\n",
4427 iscsi_session_target_state_name[session->target_state]);
4428}
4429
4430static ISCSI_CLASS_ATTR(priv_sess, target_state, S_IRUGO,
4431 show_priv_session_target_state, NULL);
4432
4433static ssize_t
4434show_priv_session_state(struct device *dev, struct device_attribute *attr,
4435 char *buf)
4436{
4437 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4438 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));
4439}
4440static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4441 NULL);
4442static ssize_t
4443show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4444 char *buf)
4445{
4446 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4447 return sysfs_emit(buf, "%d\n", session->creator);
4448}
4449static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4450 NULL);
4451static ssize_t
4452show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4453 char *buf)
4454{
4455 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4456 return sysfs_emit(buf, "%d\n", session->target_id);
4457}
4458static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4459 show_priv_session_target_id, NULL);
4460
4461#define iscsi_priv_session_attr_show(field, format) \
4462static ssize_t \
4463show_priv_session_##field(struct device *dev, \
4464 struct device_attribute *attr, char *buf) \
4465{ \
4466 struct iscsi_cls_session *session = \
4467 iscsi_dev_to_session(dev->parent); \
4468 if (session->field == -1) \
4469 return sysfs_emit(buf, "off\n"); \
4470 return sysfs_emit(buf, format"\n", session->field); \
4471}
4472
4473#define iscsi_priv_session_attr_store(field) \
4474static ssize_t \
4475store_priv_session_##field(struct device *dev, \
4476 struct device_attribute *attr, \
4477 const char *buf, size_t count) \
4478{ \
4479 int val; \
4480 char *cp; \
4481 struct iscsi_cls_session *session = \
4482 iscsi_dev_to_session(dev->parent); \
4483 if ((session->state == ISCSI_SESSION_FREE) || \
4484 (session->state == ISCSI_SESSION_FAILED)) \
4485 return -EBUSY; \
4486 if (strncmp(buf, "off", 3) == 0) { \
4487 session->field = -1; \
4488 session->field##_sysfs_override = true; \
4489 } else { \
4490 val = simple_strtoul(buf, &cp, 0); \
4491 if (*cp != '\0' && *cp != '\n') \
4492 return -EINVAL; \
4493 session->field = val; \
4494 session->field##_sysfs_override = true; \
4495 } \
4496 return count; \
4497}
4498
4499#define iscsi_priv_session_rw_attr(field, format) \
4500 iscsi_priv_session_attr_show(field, format) \
4501 iscsi_priv_session_attr_store(field) \
4502static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4503 show_priv_session_##field, \
4504 store_priv_session_##field)
4505
4506iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4507
4508static struct attribute *iscsi_session_attrs[] = {
4509 &dev_attr_sess_initial_r2t.attr,
4510 &dev_attr_sess_max_outstanding_r2t.attr,
4511 &dev_attr_sess_immediate_data.attr,
4512 &dev_attr_sess_first_burst_len.attr,
4513 &dev_attr_sess_max_burst_len.attr,
4514 &dev_attr_sess_data_pdu_in_order.attr,
4515 &dev_attr_sess_data_seq_in_order.attr,
4516 &dev_attr_sess_erl.attr,
4517 &dev_attr_sess_targetname.attr,
4518 &dev_attr_sess_tpgt.attr,
4519 &dev_attr_sess_password.attr,
4520 &dev_attr_sess_password_in.attr,
4521 &dev_attr_sess_username.attr,
4522 &dev_attr_sess_username_in.attr,
4523 &dev_attr_sess_fast_abort.attr,
4524 &dev_attr_sess_abort_tmo.attr,
4525 &dev_attr_sess_lu_reset_tmo.attr,
4526 &dev_attr_sess_tgt_reset_tmo.attr,
4527 &dev_attr_sess_ifacename.attr,
4528 &dev_attr_sess_initiatorname.attr,
4529 &dev_attr_sess_targetalias.attr,
4530 &dev_attr_sess_boot_root.attr,
4531 &dev_attr_sess_boot_nic.attr,
4532 &dev_attr_sess_boot_target.attr,
4533 &dev_attr_priv_sess_recovery_tmo.attr,
4534 &dev_attr_priv_sess_state.attr,
4535 &dev_attr_priv_sess_target_state.attr,
4536 &dev_attr_priv_sess_creator.attr,
4537 &dev_attr_sess_chap_out_idx.attr,
4538 &dev_attr_sess_chap_in_idx.attr,
4539 &dev_attr_priv_sess_target_id.attr,
4540 &dev_attr_sess_auto_snd_tgt_disable.attr,
4541 &dev_attr_sess_discovery_session.attr,
4542 &dev_attr_sess_portal_type.attr,
4543 &dev_attr_sess_chap_auth.attr,
4544 &dev_attr_sess_discovery_logout.attr,
4545 &dev_attr_sess_bidi_chap.attr,
4546 &dev_attr_sess_discovery_auth_optional.attr,
4547 &dev_attr_sess_def_time2wait.attr,
4548 &dev_attr_sess_def_time2retain.attr,
4549 &dev_attr_sess_isid.attr,
4550 &dev_attr_sess_tsid.attr,
4551 &dev_attr_sess_def_taskmgmt_tmo.attr,
4552 &dev_attr_sess_discovery_parent_idx.attr,
4553 &dev_attr_sess_discovery_parent_type.attr,
4554 NULL,
4555};
4556
4557static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4558 struct attribute *attr, int i)
4559{
4560 struct device *cdev = container_of(kobj, struct device, kobj);
4561 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4562 struct iscsi_transport *t = session->transport;
4563 int param;
4564
4565 if (attr == &dev_attr_sess_initial_r2t.attr)
4566 param = ISCSI_PARAM_INITIAL_R2T_EN;
4567 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4568 param = ISCSI_PARAM_MAX_R2T;
4569 else if (attr == &dev_attr_sess_immediate_data.attr)
4570 param = ISCSI_PARAM_IMM_DATA_EN;
4571 else if (attr == &dev_attr_sess_first_burst_len.attr)
4572 param = ISCSI_PARAM_FIRST_BURST;
4573 else if (attr == &dev_attr_sess_max_burst_len.attr)
4574 param = ISCSI_PARAM_MAX_BURST;
4575 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4576 param = ISCSI_PARAM_PDU_INORDER_EN;
4577 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4578 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4579 else if (attr == &dev_attr_sess_erl.attr)
4580 param = ISCSI_PARAM_ERL;
4581 else if (attr == &dev_attr_sess_targetname.attr)
4582 param = ISCSI_PARAM_TARGET_NAME;
4583 else if (attr == &dev_attr_sess_tpgt.attr)
4584 param = ISCSI_PARAM_TPGT;
4585 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4586 param = ISCSI_PARAM_CHAP_IN_IDX;
4587 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4588 param = ISCSI_PARAM_CHAP_OUT_IDX;
4589 else if (attr == &dev_attr_sess_password.attr)
4590 param = ISCSI_PARAM_USERNAME;
4591 else if (attr == &dev_attr_sess_password_in.attr)
4592 param = ISCSI_PARAM_USERNAME_IN;
4593 else if (attr == &dev_attr_sess_username.attr)
4594 param = ISCSI_PARAM_PASSWORD;
4595 else if (attr == &dev_attr_sess_username_in.attr)
4596 param = ISCSI_PARAM_PASSWORD_IN;
4597 else if (attr == &dev_attr_sess_fast_abort.attr)
4598 param = ISCSI_PARAM_FAST_ABORT;
4599 else if (attr == &dev_attr_sess_abort_tmo.attr)
4600 param = ISCSI_PARAM_ABORT_TMO;
4601 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4602 param = ISCSI_PARAM_LU_RESET_TMO;
4603 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4604 param = ISCSI_PARAM_TGT_RESET_TMO;
4605 else if (attr == &dev_attr_sess_ifacename.attr)
4606 param = ISCSI_PARAM_IFACE_NAME;
4607 else if (attr == &dev_attr_sess_initiatorname.attr)
4608 param = ISCSI_PARAM_INITIATOR_NAME;
4609 else if (attr == &dev_attr_sess_targetalias.attr)
4610 param = ISCSI_PARAM_TARGET_ALIAS;
4611 else if (attr == &dev_attr_sess_boot_root.attr)
4612 param = ISCSI_PARAM_BOOT_ROOT;
4613 else if (attr == &dev_attr_sess_boot_nic.attr)
4614 param = ISCSI_PARAM_BOOT_NIC;
4615 else if (attr == &dev_attr_sess_boot_target.attr)
4616 param = ISCSI_PARAM_BOOT_TARGET;
4617 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4618 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4619 else if (attr == &dev_attr_sess_discovery_session.attr)
4620 param = ISCSI_PARAM_DISCOVERY_SESS;
4621 else if (attr == &dev_attr_sess_portal_type.attr)
4622 param = ISCSI_PARAM_PORTAL_TYPE;
4623 else if (attr == &dev_attr_sess_chap_auth.attr)
4624 param = ISCSI_PARAM_CHAP_AUTH_EN;
4625 else if (attr == &dev_attr_sess_discovery_logout.attr)
4626 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4627 else if (attr == &dev_attr_sess_bidi_chap.attr)
4628 param = ISCSI_PARAM_BIDI_CHAP_EN;
4629 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4630 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4631 else if (attr == &dev_attr_sess_def_time2wait.attr)
4632 param = ISCSI_PARAM_DEF_TIME2WAIT;
4633 else if (attr == &dev_attr_sess_def_time2retain.attr)
4634 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4635 else if (attr == &dev_attr_sess_isid.attr)
4636 param = ISCSI_PARAM_ISID;
4637 else if (attr == &dev_attr_sess_tsid.attr)
4638 param = ISCSI_PARAM_TSID;
4639 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4640 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4641 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4642 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4643 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4644 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4645 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4646 return S_IRUGO | S_IWUSR;
4647 else if (attr == &dev_attr_priv_sess_state.attr)
4648 return S_IRUGO;
4649 else if (attr == &dev_attr_priv_sess_target_state.attr)
4650 return S_IRUGO;
4651 else if (attr == &dev_attr_priv_sess_creator.attr)
4652 return S_IRUGO;
4653 else if (attr == &dev_attr_priv_sess_target_id.attr)
4654 return S_IRUGO;
4655 else {
4656 WARN_ONCE(1, "Invalid session attr");
4657 return 0;
4658 }
4659
4660 return t->attr_is_visible(ISCSI_PARAM, param);
4661}
4662
4663static struct attribute_group iscsi_session_group = {
4664 .attrs = iscsi_session_attrs,
4665 .is_visible = iscsi_session_attr_is_visible,
4666};
4667
4668/*
4669 * iSCSI host attrs
4670 */
4671#define iscsi_host_attr_show(param) \
4672static ssize_t \
4673show_host_param_##param(struct device *dev, \
4674 struct device_attribute *attr, char *buf) \
4675{ \
4676 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4677 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4678 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4679}
4680
4681#define iscsi_host_attr(field, param) \
4682 iscsi_host_attr_show(param) \
4683static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4684 NULL);
4685
4686iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4687iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4688iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4689iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4690iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4691iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4692
4693static struct attribute *iscsi_host_attrs[] = {
4694 &dev_attr_host_netdev.attr,
4695 &dev_attr_host_hwaddress.attr,
4696 &dev_attr_host_ipaddress.attr,
4697 &dev_attr_host_initiatorname.attr,
4698 &dev_attr_host_port_state.attr,
4699 &dev_attr_host_port_speed.attr,
4700 NULL,
4701};
4702
4703static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4704 struct attribute *attr, int i)
4705{
4706 struct device *cdev = container_of(kobj, struct device, kobj);
4707 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4708 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4709 int param;
4710
4711 if (attr == &dev_attr_host_netdev.attr)
4712 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4713 else if (attr == &dev_attr_host_hwaddress.attr)
4714 param = ISCSI_HOST_PARAM_HWADDRESS;
4715 else if (attr == &dev_attr_host_ipaddress.attr)
4716 param = ISCSI_HOST_PARAM_IPADDRESS;
4717 else if (attr == &dev_attr_host_initiatorname.attr)
4718 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4719 else if (attr == &dev_attr_host_port_state.attr)
4720 param = ISCSI_HOST_PARAM_PORT_STATE;
4721 else if (attr == &dev_attr_host_port_speed.attr)
4722 param = ISCSI_HOST_PARAM_PORT_SPEED;
4723 else {
4724 WARN_ONCE(1, "Invalid host attr");
4725 return 0;
4726 }
4727
4728 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4729}
4730
4731static struct attribute_group iscsi_host_group = {
4732 .attrs = iscsi_host_attrs,
4733 .is_visible = iscsi_host_attr_is_visible,
4734};
4735
4736/* convert iscsi_port_speed values to ascii string name */
4737static const struct {
4738 enum iscsi_port_speed value;
4739 char *name;
4740} iscsi_port_speed_names[] = {
4741 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4742 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4743 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4744 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4745 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4746 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4747 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
4748};
4749
4750char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4751{
4752 int i;
4753 char *speed = "Unknown!";
4754 struct iscsi_cls_host *ihost = shost->shost_data;
4755 uint32_t port_speed = ihost->port_speed;
4756
4757 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4758 if (iscsi_port_speed_names[i].value & port_speed) {
4759 speed = iscsi_port_speed_names[i].name;
4760 break;
4761 }
4762 }
4763 return speed;
4764}
4765EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4766
4767/* convert iscsi_port_state values to ascii string name */
4768static const struct {
4769 enum iscsi_port_state value;
4770 char *name;
4771} iscsi_port_state_names[] = {
4772 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4773 {ISCSI_PORT_STATE_UP, "LINK UP" },
4774};
4775
4776char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4777{
4778 int i;
4779 char *state = "Unknown!";
4780 struct iscsi_cls_host *ihost = shost->shost_data;
4781 uint32_t port_state = ihost->port_state;
4782
4783 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4784 if (iscsi_port_state_names[i].value & port_state) {
4785 state = iscsi_port_state_names[i].name;
4786 break;
4787 }
4788 }
4789 return state;
4790}
4791EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4792
4793static int iscsi_session_match(struct attribute_container *cont,
4794 struct device *dev)
4795{
4796 struct iscsi_cls_session *session;
4797 struct Scsi_Host *shost;
4798 struct iscsi_internal *priv;
4799
4800 if (!iscsi_is_session_dev(dev))
4801 return 0;
4802
4803 session = iscsi_dev_to_session(dev);
4804 shost = iscsi_session_to_shost(session);
4805 if (!shost->transportt)
4806 return 0;
4807
4808 priv = to_iscsi_internal(shost->transportt);
4809 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4810 return 0;
4811
4812 return &priv->session_cont.ac == cont;
4813}
4814
4815static int iscsi_conn_match(struct attribute_container *cont,
4816 struct device *dev)
4817{
4818 struct iscsi_cls_session *session;
4819 struct iscsi_cls_conn *conn;
4820 struct Scsi_Host *shost;
4821 struct iscsi_internal *priv;
4822
4823 if (!iscsi_is_conn_dev(dev))
4824 return 0;
4825
4826 conn = iscsi_dev_to_conn(dev);
4827 session = iscsi_dev_to_session(conn->dev.parent);
4828 shost = iscsi_session_to_shost(session);
4829
4830 if (!shost->transportt)
4831 return 0;
4832
4833 priv = to_iscsi_internal(shost->transportt);
4834 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4835 return 0;
4836
4837 return &priv->conn_cont.ac == cont;
4838}
4839
4840static int iscsi_host_match(struct attribute_container *cont,
4841 struct device *dev)
4842{
4843 struct Scsi_Host *shost;
4844 struct iscsi_internal *priv;
4845
4846 if (!scsi_is_host_device(dev))
4847 return 0;
4848
4849 shost = dev_to_shost(dev);
4850 if (!shost->transportt ||
4851 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4852 return 0;
4853
4854 priv = to_iscsi_internal(shost->transportt);
4855 return &priv->t.host_attrs.ac == cont;
4856}
4857
4858struct scsi_transport_template *
4859iscsi_register_transport(struct iscsi_transport *tt)
4860{
4861 struct iscsi_internal *priv;
4862 unsigned long flags;
4863 int err;
4864
4865 BUG_ON(!tt);
4866 WARN_ON(tt->ep_disconnect && !tt->unbind_conn);
4867
4868 priv = iscsi_if_transport_lookup(tt);
4869 if (priv)
4870 return NULL;
4871
4872 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4873 if (!priv)
4874 return NULL;
4875 INIT_LIST_HEAD(&priv->list);
4876 priv->iscsi_transport = tt;
4877 priv->t.user_scan = iscsi_user_scan;
4878
4879 priv->dev.class = &iscsi_transport_class;
4880 dev_set_name(&priv->dev, "%s", tt->name);
4881 err = device_register(&priv->dev);
4882 if (err)
4883 goto put_dev;
4884
4885 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4886 if (err)
4887 goto unregister_dev;
4888
4889 /* host parameters */
4890 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4891 priv->t.host_attrs.ac.match = iscsi_host_match;
4892 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4893 priv->t.host_size = sizeof(struct iscsi_cls_host);
4894 transport_container_register(&priv->t.host_attrs);
4895
4896 /* connection parameters */
4897 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4898 priv->conn_cont.ac.match = iscsi_conn_match;
4899 priv->conn_cont.ac.grp = &iscsi_conn_group;
4900 transport_container_register(&priv->conn_cont);
4901
4902 /* session parameters */
4903 priv->session_cont.ac.class = &iscsi_session_class.class;
4904 priv->session_cont.ac.match = iscsi_session_match;
4905 priv->session_cont.ac.grp = &iscsi_session_group;
4906 transport_container_register(&priv->session_cont);
4907
4908 spin_lock_irqsave(&iscsi_transport_lock, flags);
4909 list_add(&priv->list, &iscsi_transports);
4910 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4911
4912 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4913 return &priv->t;
4914
4915unregister_dev:
4916 device_unregister(&priv->dev);
4917 return NULL;
4918put_dev:
4919 put_device(&priv->dev);
4920 return NULL;
4921}
4922EXPORT_SYMBOL_GPL(iscsi_register_transport);
4923
4924void iscsi_unregister_transport(struct iscsi_transport *tt)
4925{
4926 struct iscsi_internal *priv;
4927 unsigned long flags;
4928
4929 BUG_ON(!tt);
4930
4931 mutex_lock(&rx_queue_mutex);
4932
4933 priv = iscsi_if_transport_lookup(tt);
4934 BUG_ON (!priv);
4935
4936 spin_lock_irqsave(&iscsi_transport_lock, flags);
4937 list_del(&priv->list);
4938 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4939
4940 transport_container_unregister(&priv->conn_cont);
4941 transport_container_unregister(&priv->session_cont);
4942 transport_container_unregister(&priv->t.host_attrs);
4943
4944 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4945 device_unregister(&priv->dev);
4946 mutex_unlock(&rx_queue_mutex);
4947}
4948EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4949
4950void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),
4951 struct device *dev, const char *fmt, ...)
4952{
4953 struct va_format vaf;
4954 va_list args;
4955
4956 va_start(args, fmt);
4957 vaf.fmt = fmt;
4958 vaf.va = &args;
4959 trace(dev, &vaf);
4960 va_end(args);
4961}
4962EXPORT_SYMBOL_GPL(iscsi_dbg_trace);
4963
4964static __init int iscsi_transport_init(void)
4965{
4966 int err;
4967 struct netlink_kernel_cfg cfg = {
4968 .groups = 1,
4969 .input = iscsi_if_rx,
4970 };
4971 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4972 ISCSI_TRANSPORT_VERSION);
4973
4974 atomic_set(&iscsi_session_nr, 0);
4975
4976 err = class_register(&iscsi_transport_class);
4977 if (err)
4978 return err;
4979
4980 err = class_register(&iscsi_endpoint_class);
4981 if (err)
4982 goto unregister_transport_class;
4983
4984 err = class_register(&iscsi_iface_class);
4985 if (err)
4986 goto unregister_endpoint_class;
4987
4988 err = transport_class_register(&iscsi_host_class);
4989 if (err)
4990 goto unregister_iface_class;
4991
4992 err = transport_class_register(&iscsi_connection_class);
4993 if (err)
4994 goto unregister_host_class;
4995
4996 err = transport_class_register(&iscsi_session_class);
4997 if (err)
4998 goto unregister_conn_class;
4999
5000 err = bus_register(&iscsi_flashnode_bus);
5001 if (err)
5002 goto unregister_session_class;
5003
5004 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
5005 if (!nls) {
5006 err = -ENOBUFS;
5007 goto unregister_flashnode_bus;
5008 }
5009
5010 iscsi_conn_cleanup_workq = alloc_workqueue("%s",
5011 WQ_SYSFS | WQ_MEM_RECLAIM | WQ_UNBOUND, 0,
5012 "iscsi_conn_cleanup");
5013 if (!iscsi_conn_cleanup_workq) {
5014 err = -ENOMEM;
5015 goto release_nls;
5016 }
5017
5018 return 0;
5019
5020release_nls:
5021 netlink_kernel_release(nls);
5022unregister_flashnode_bus:
5023 bus_unregister(&iscsi_flashnode_bus);
5024unregister_session_class:
5025 transport_class_unregister(&iscsi_session_class);
5026unregister_conn_class:
5027 transport_class_unregister(&iscsi_connection_class);
5028unregister_host_class:
5029 transport_class_unregister(&iscsi_host_class);
5030unregister_iface_class:
5031 class_unregister(&iscsi_iface_class);
5032unregister_endpoint_class:
5033 class_unregister(&iscsi_endpoint_class);
5034unregister_transport_class:
5035 class_unregister(&iscsi_transport_class);
5036 return err;
5037}
5038
5039static void __exit iscsi_transport_exit(void)
5040{
5041 destroy_workqueue(iscsi_conn_cleanup_workq);
5042 netlink_kernel_release(nls);
5043 bus_unregister(&iscsi_flashnode_bus);
5044 transport_class_unregister(&iscsi_connection_class);
5045 transport_class_unregister(&iscsi_session_class);
5046 transport_class_unregister(&iscsi_host_class);
5047 class_unregister(&iscsi_endpoint_class);
5048 class_unregister(&iscsi_iface_class);
5049 class_unregister(&iscsi_transport_class);
5050}
5051
5052module_init(iscsi_transport_init);
5053module_exit(iscsi_transport_exit);
5054
5055MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
5056 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
5057 "Alex Aizman <itn780@yahoo.com>");
5058MODULE_DESCRIPTION("iSCSI Transport Interface");
5059MODULE_LICENSE("GPL");
5060MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
5061MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
Linux 6.x block layer and io_uring tree(s)