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Merge branches 'for-4.11/upstream-fixes', 'for-4.12/accutouch', 'for-4.12/cp2112...
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / scsi_transport_iscsi.c
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0896b752 1/*
1da177e4
LT		 2 * iSCSI transport class definitions
3 *
4 * Copyright (C) IBM Corporation, 2004
0896b752
AA		 5 * Copyright (C) Mike Christie, 2004 - 2005
6 * Copyright (C) Dmitry Yusupov, 2004 - 2005
7 * Copyright (C) Alex Aizman, 2004 - 2005
1da177e4
LT		 8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23#include <linux/module.h>
0b950672 24#include <linux/mutex.h>
5a0e3ad6 25#include <linux/slab.h>
90eeb01a 26#include <linux/bsg-lib.h>
8d4a690c 27#include <linux/idr.h>
0896b752 28#include <net/tcp.h>
1da177e4
LT		 29#include <scsi/scsi.h>
30#include <scsi/scsi_host.h>
31#include <scsi/scsi_device.h>
32#include <scsi/scsi_transport.h>
33#include <scsi/scsi_transport_iscsi.h>
0896b752 34#include <scsi/iscsi_if.h>
c01be6dc 35#include <scsi/scsi_cmnd.h>
90eeb01a 36#include <scsi/scsi_bsg_iscsi.h>
1da177e4 37
4c2133c8 38#define ISCSI_TRANSPORT_VERSION "2.0-870"
1da177e4 39
632248aa
MC		 40static int dbg_session;
41module_param_named(debug_session, dbg_session, int,
42 S_IRUGO | S_IWUSR);
43MODULE_PARM_DESC(debug_session,
44 "Turn on debugging for sessions in scsi_transport_iscsi "
45 "module. Set to 1 to turn on, and zero to turn off. Default "
46 "is off.");
47
48static int dbg_conn;
49module_param_named(debug_conn, dbg_conn, int,
50 S_IRUGO | S_IWUSR);
51MODULE_PARM_DESC(debug_conn,
52 "Turn on debugging for connections in scsi_transport_iscsi "
53 "module. Set to 1 to turn on, and zero to turn off. Default "
54 "is off.");
55
56#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
57 do { \
58 if (dbg_session) \
59 iscsi_cls_session_printk(KERN_INFO, _session, \
60 "%s: " dbg_fmt, \
61 __func__, ##arg); \
62 } while (0);
63
64#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
65 do { \
66 if (dbg_conn) \
67 iscsi_cls_conn_printk(KERN_INFO, _conn, \
68 "%s: " dbg_fmt, \
69 __func__, ##arg); \
70 } while (0);
71
1da177e4
LT		 72struct iscsi_internal {
73 struct scsi_transport_template t;
0896b752
AA		 74 struct iscsi_transport *iscsi_transport;
75 struct list_head list;
ee959b00 76 struct device dev;
30a6c652 77
0896b752 78 struct transport_container conn_cont;
0896b752 79 struct transport_container session_cont;
1da177e4
LT		 80};
81
41be1444 82static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
d8bf541e 83static struct workqueue_struct *iscsi_eh_timer_workq;
b5c7a12d 84
8d4a690c 85static DEFINE_IDA(iscsi_sess_ida);
0896b752
AA		 86/*
87 * list of registered transports and lock that must
88 * be held while accessing list. The iscsi_transport_lock must
0b950672 89 * be acquired after the rx_queue_mutex.
0896b752
AA		 90 */
91static LIST_HEAD(iscsi_transports);
92static DEFINE_SPINLOCK(iscsi_transport_lock);
93
94#define to_iscsi_internal(tmpl) \
95 container_of(tmpl, struct iscsi_internal, t)
96
ee959b00
TJ		 97#define dev_to_iscsi_internal(_dev) \
98 container_of(_dev, struct iscsi_internal, dev)
0896b752 99
ee959b00 100static void iscsi_transport_release(struct device *dev)
0896b752 101{
ee959b00 102 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
0896b752
AA		 103 kfree(priv);
104}
1da177e4 105
0896b752
AA		 106/*
107 * iscsi_transport_class represents the iscsi_transports that are
108 * registered.
109 */
110static struct class iscsi_transport_class = {
111 .name = "iscsi_transport",
ee959b00 112 .dev_release = iscsi_transport_release,
0896b752
AA		 113};
114
115static ssize_t
ee959b00
TJ		 116show_transport_handle(struct device *dev, struct device_attribute *attr,
117 char *buf)
0896b752 118{
ee959b00 119 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
762e2bfa 120 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
0896b752 121}
ee959b00 122static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
0896b752
AA		 123
124#define show_transport_attr(name, format) \
125static ssize_t \
ee959b00
TJ		 126show_transport_##name(struct device *dev, \
127 struct device_attribute *attr,char *buf) \
0896b752 128{ \
ee959b00 129 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
0896b752
AA		 130 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
131} \
ee959b00 132static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
0896b752
AA		 133
134show_transport_attr(caps, "0x%x");
0896b752
AA		 135
136static struct attribute *iscsi_transport_attrs[] = {
ee959b00
TJ		 137 &dev_attr_handle.attr,
138 &dev_attr_caps.attr,
0896b752
AA		 139 NULL,
140};
141
142static struct attribute_group iscsi_transport_group = {
143 .attrs = iscsi_transport_attrs,
144};
145
d82ff9be
MC		 146/*
147 * iSCSI endpoint attrs
148 */
149#define iscsi_dev_to_endpoint(_dev) \
150 container_of(_dev, struct iscsi_endpoint, dev)
151
152#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
153struct device_attribute dev_attr_##_prefix##_##_name = \
154 __ATTR(_name,_mode,_show,_store)
155
156static void iscsi_endpoint_release(struct device *dev)
157{
158 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
159 kfree(ep);
160}
161
162static struct class iscsi_endpoint_class = {
163 .name = "iscsi_endpoint",
164 .dev_release = iscsi_endpoint_release,
165};
166
167static ssize_t
168show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
169{
170 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
21536062 171 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
d82ff9be
MC		 172}
173static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
174
175static struct attribute *iscsi_endpoint_attrs[] = {
176 &dev_attr_ep_handle.attr,
177 NULL,
178};
179
180static struct attribute_group iscsi_endpoint_group = {
181 .attrs = iscsi_endpoint_attrs,
182};
183
184#define ISCSI_MAX_EPID -1
185
9f3b795a 186static int iscsi_match_epid(struct device *dev, const void *data)
d82ff9be
MC		 187{
188 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
9f3b795a 189 const uint64_t *epid = data;
d82ff9be
MC		 190
191 return *epid == ep->id;
192}
193
194struct iscsi_endpoint *
195iscsi_create_endpoint(int dd_size)
196{
197 struct device *dev;
198 struct iscsi_endpoint *ep;
21536062 199 uint64_t id;
d82ff9be
MC		 200 int err;
201
202 for (id = 1; id < ISCSI_MAX_EPID; id++) {
695794ae 203 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
d82ff9be
MC		 204 iscsi_match_epid);
205 if (!dev)
206 break;
4ce30874
SG		 207 else
208 put_device(dev);
d82ff9be
MC		 209 }
210 if (id == ISCSI_MAX_EPID) {
211 printk(KERN_ERR "Too many connections. Max supported %u\n",
212 ISCSI_MAX_EPID - 1);
213 return NULL;
214 }
215
216 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
217 if (!ep)
218 return NULL;
219
220 ep->id = id;
221 ep->dev.class = &iscsi_endpoint_class;
71610f55 222 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
d82ff9be
MC		 223 err = device_register(&ep->dev);
224 if (err)
225 goto free_ep;
226
227 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
228 if (err)
229 goto unregister_dev;
230
231 if (dd_size)
232 ep->dd_data = &ep[1];
233 return ep;
234
235unregister_dev:
236 device_unregister(&ep->dev);
237 return NULL;
238
239free_ep:
240 kfree(ep);
241 return NULL;
242}
243EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
244
245void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
246{
247 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
248 device_unregister(&ep->dev);
249}
250EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
251
252struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
253{
f80f868e 254 struct iscsi_endpoint *ep;
d82ff9be
MC		 255 struct device *dev;
256
695794ae 257 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
d82ff9be
MC		 258 iscsi_match_epid);
259 if (!dev)
260 return NULL;
261
f80f868e
MC		 262 ep = iscsi_dev_to_endpoint(dev);
263 /*
264 * we can drop this now because the interface will prevent
265 * removals and lookups from racing.
266 */
267 put_device(dev);
268 return ep;
d82ff9be
MC		 269}
270EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
271
8d07913d
MC		 272/*
273 * Interface to display network param to sysfs
274 */
275
276static void iscsi_iface_release(struct device *dev)
277{
278 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
279 struct device *parent = iface->dev.parent;
280
281 kfree(iface);
282 put_device(parent);
283}
284
285
286static struct class iscsi_iface_class = {
287 .name = "iscsi_iface",
288 .dev_release = iscsi_iface_release,
289};
290
291#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
292struct device_attribute dev_attr_##_prefix##_##_name = \
293 __ATTR(_name, _mode, _show, _store)
294
295/* iface attrs show */
296#define iscsi_iface_attr_show(type, name, param_type, param) \
297static ssize_t \
298show_##type##_##name(struct device *dev, struct device_attribute *attr, \
299 char *buf) \
300{ \
301 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
302 struct iscsi_transport *t = iface->transport; \
303 return t->get_iface_param(iface, param_type, param, buf); \
304} \
305
306#define iscsi_iface_net_attr(type, name, param) \
307 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
308static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
309
3e0f65b3
HZ		 310#define iscsi_iface_attr(type, name, param) \
311 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
312static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
313
314/* generic read only ipv4 attribute */
8d07913d
MC		 315iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
316iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
317iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
318iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
3e0f65b3
HZ		 319iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
320 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
321iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
322 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
323iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
324iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
325iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
326 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
327iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
328 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
329iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
330 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
331iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
332 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
333iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
334 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
335iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
336 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
337iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
338 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
339iscsi_iface_net_attr(ipv4_iface, fragment_disable,
340 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
341iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
342 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
343iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
8d07913d
MC		 344
345/* generic read only ipv6 attribute */
346iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
3e0f65b3
HZ		 347iscsi_iface_net_attr(ipv6_iface, link_local_addr,
348 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
8d07913d
MC		 349iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
350iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
351 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
88f4f517 352iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
8d07913d 353 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
3e0f65b3
HZ		 354iscsi_iface_net_attr(ipv6_iface, link_local_state,
355 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
356iscsi_iface_net_attr(ipv6_iface, router_state,
357 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
358iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
359 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
360iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
361iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
362iscsi_iface_net_attr(ipv6_iface, traffic_class,
363 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
364iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
365iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
366 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
367iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
368 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
369iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
370 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
371iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
372 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
373iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
374 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
8d07913d
MC		 375
376/* common read only iface attribute */
377iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
2d63673b 378iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
4223b9e9
MC		 379iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
380iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
8c7d40fb 381iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
fcb5124e 382iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
3e0f65b3
HZ		 383iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
384iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
385iscsi_iface_net_attr(iface, tcp_nagle_disable,
386 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
387iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
388iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
389iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
390iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
391iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
392iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
393
394/* common iscsi specific settings attributes */
395iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
396iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
397iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
398iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
399iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
400iscsi_iface_attr(iface, data_seq_in_order,
401 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
402iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
403iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
404iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
405iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
406iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
407iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
408iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
409iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
410iscsi_iface_attr(iface, discovery_auth_optional,
411 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
412iscsi_iface_attr(iface, discovery_logout,
413 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
414iscsi_iface_attr(iface, strict_login_comp_en,
415 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
416iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
8d07913d 417
587a1f16 418static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
8d07913d
MC		 419 struct attribute *attr, int i)
420{
421 struct device *dev = container_of(kobj, struct device, kobj);
422 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
423 struct iscsi_transport *t = iface->transport;
b78dbba0 424 int param;
3e0f65b3 425 int param_type;
8d07913d
MC		 426
427 if (attr == &dev_attr_iface_enabled.attr)
b78dbba0 428 param = ISCSI_NET_PARAM_IFACE_ENABLE;
2d63673b 429 else if (attr == &dev_attr_iface_vlan_id.attr)
b78dbba0 430 param = ISCSI_NET_PARAM_VLAN_ID;
4223b9e9
MC		 431 else if (attr == &dev_attr_iface_vlan_priority.attr)
432 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
433 else if (attr == &dev_attr_iface_vlan_enabled.attr)
434 param = ISCSI_NET_PARAM_VLAN_ENABLED;
8c7d40fb
VC		 435 else if (attr == &dev_attr_iface_mtu.attr)
436 param = ISCSI_NET_PARAM_MTU;
fcb5124e
VC		 437 else if (attr == &dev_attr_iface_port.attr)
438 param = ISCSI_NET_PARAM_PORT;
3e0f65b3
HZ		 439 else if (attr == &dev_attr_iface_ipaddress_state.attr)
440 param = ISCSI_NET_PARAM_IPADDR_STATE;
441 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
442 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
443 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
444 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
445 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
446 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
447 else if (attr == &dev_attr_iface_tcp_wsf.attr)
448 param = ISCSI_NET_PARAM_TCP_WSF;
449 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
450 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
451 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
452 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
453 else if (attr == &dev_attr_iface_cache_id.attr)
454 param = ISCSI_NET_PARAM_CACHE_ID;
455 else if (attr == &dev_attr_iface_redirect_en.attr)
456 param = ISCSI_NET_PARAM_REDIRECT_EN;
457 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
458 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
459 else if (attr == &dev_attr_iface_header_digest.attr)
460 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
461 else if (attr == &dev_attr_iface_data_digest.attr)
462 param = ISCSI_IFACE_PARAM_DATADGST_EN;
463 else if (attr == &dev_attr_iface_immediate_data.attr)
464 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
465 else if (attr == &dev_attr_iface_initial_r2t.attr)
466 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
467 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
468 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
469 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
470 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
471 else if (attr == &dev_attr_iface_erl.attr)
472 param = ISCSI_IFACE_PARAM_ERL;
473 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
474 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
475 else if (attr == &dev_attr_iface_first_burst_len.attr)
476 param = ISCSI_IFACE_PARAM_FIRST_BURST;
477 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
478 param = ISCSI_IFACE_PARAM_MAX_R2T;
479 else if (attr == &dev_attr_iface_max_burst_len.attr)
480 param = ISCSI_IFACE_PARAM_MAX_BURST;
481 else if (attr == &dev_attr_iface_chap_auth.attr)
482 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
483 else if (attr == &dev_attr_iface_bidi_chap.attr)
484 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
485 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
486 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
487 else if (attr == &dev_attr_iface_discovery_logout.attr)
488 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
489 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
490 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
491 else if (attr == &dev_attr_iface_initiator_name.attr)
492 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
b78dbba0 493 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
8d07913d 494 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
b78dbba0 495 param = ISCSI_NET_PARAM_IPV4_ADDR;
8d07913d 496 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
b78dbba0 497 param = ISCSI_NET_PARAM_IPV4_GW;
8d07913d 498 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
b78dbba0 499 param = ISCSI_NET_PARAM_IPV4_SUBNET;
8d07913d 500 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
b78dbba0 501 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
3e0f65b3
HZ		 502 else if (attr ==
503 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
504 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
505 else if (attr ==
506 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
507 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
508 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
509 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
510 else if (attr == &dev_attr_ipv4_iface_tos.attr)
511 param = ISCSI_NET_PARAM_IPV4_TOS;
512 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
513 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
514 else if (attr ==
515 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
516 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
517 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
518 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
519 else if (attr ==
520 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
521 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
522 else if (attr ==
523 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
524 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
525 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
526 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
527 else if (attr ==
528 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
529 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
530 else if (attr ==
531 &dev_attr_ipv4_iface_fragment_disable.attr)
532 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
533 else if (attr ==
534 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
535 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
536 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
537 param = ISCSI_NET_PARAM_IPV4_TTL;
b78dbba0
MC		 538 else
539 return 0;
8d07913d
MC		 540 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
541 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
b78dbba0 542 param = ISCSI_NET_PARAM_IPV6_ADDR;
8d07913d 543 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
b78dbba0 544 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
8d07913d 545 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
b78dbba0 546 param = ISCSI_NET_PARAM_IPV6_ROUTER;
8d07913d 547 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
b78dbba0 548 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
88f4f517 549 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
b78dbba0 550 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
3e0f65b3
HZ		 551 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
552 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
553 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
554 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
555 else if (attr ==
556 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
557 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
558 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
559 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
560 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
561 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
562 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
563 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
564 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
565 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
566 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
567 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
568 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
569 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
570 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
571 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
572 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
573 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
574 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
575 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
b78dbba0
MC		 576 else
577 return 0;
578 } else {
579 WARN_ONCE(1, "Invalid iface attr");
580 return 0;
8d07913d
MC		 581 }
582
3e0f65b3
HZ		 583 switch (param) {
584 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
585 case ISCSI_IFACE_PARAM_HDRDGST_EN:
586 case ISCSI_IFACE_PARAM_DATADGST_EN:
587 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
588 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
589 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
590 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
591 case ISCSI_IFACE_PARAM_ERL:
592 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
593 case ISCSI_IFACE_PARAM_FIRST_BURST:
594 case ISCSI_IFACE_PARAM_MAX_R2T:
595 case ISCSI_IFACE_PARAM_MAX_BURST:
596 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
597 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
598 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
599 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
600 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
601 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
602 param_type = ISCSI_IFACE_PARAM;
603 break;
604 default:
605 param_type = ISCSI_NET_PARAM;
606 }
607
608 return t->attr_is_visible(param_type, param);
8d07913d
MC		 609}
610
611static struct attribute *iscsi_iface_attrs[] = {
612 &dev_attr_iface_enabled.attr,
2d63673b 613 &dev_attr_iface_vlan_id.attr,
4223b9e9
MC		 614 &dev_attr_iface_vlan_priority.attr,
615 &dev_attr_iface_vlan_enabled.attr,
8d07913d
MC		 616 &dev_attr_ipv4_iface_ipaddress.attr,
617 &dev_attr_ipv4_iface_gateway.attr,
618 &dev_attr_ipv4_iface_subnet.attr,
619 &dev_attr_ipv4_iface_bootproto.attr,
620 &dev_attr_ipv6_iface_ipaddress.attr,
621 &dev_attr_ipv6_iface_link_local_addr.attr,
622 &dev_attr_ipv6_iface_router_addr.attr,
623 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
88f4f517 624 &dev_attr_ipv6_iface_link_local_autocfg.attr,
8c7d40fb 625 &dev_attr_iface_mtu.attr,
fcb5124e 626 &dev_attr_iface_port.attr,
3e0f65b3
HZ		 627 &dev_attr_iface_ipaddress_state.attr,
628 &dev_attr_iface_delayed_ack_en.attr,
629 &dev_attr_iface_tcp_nagle_disable.attr,
630 &dev_attr_iface_tcp_wsf_disable.attr,
631 &dev_attr_iface_tcp_wsf.attr,
632 &dev_attr_iface_tcp_timer_scale.attr,
633 &dev_attr_iface_tcp_timestamp_en.attr,
634 &dev_attr_iface_cache_id.attr,
635 &dev_attr_iface_redirect_en.attr,
636 &dev_attr_iface_def_taskmgmt_tmo.attr,
637 &dev_attr_iface_header_digest.attr,
638 &dev_attr_iface_data_digest.attr,
639 &dev_attr_iface_immediate_data.attr,
640 &dev_attr_iface_initial_r2t.attr,
641 &dev_attr_iface_data_seq_in_order.attr,
642 &dev_attr_iface_data_pdu_in_order.attr,
643 &dev_attr_iface_erl.attr,
644 &dev_attr_iface_max_recv_dlength.attr,
645 &dev_attr_iface_first_burst_len.attr,
646 &dev_attr_iface_max_outstanding_r2t.attr,
647 &dev_attr_iface_max_burst_len.attr,
648 &dev_attr_iface_chap_auth.attr,
649 &dev_attr_iface_bidi_chap.attr,
650 &dev_attr_iface_discovery_auth_optional.attr,
651 &dev_attr_iface_discovery_logout.attr,
652 &dev_attr_iface_strict_login_comp_en.attr,
653 &dev_attr_iface_initiator_name.attr,
654 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
655 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
656 &dev_attr_ipv4_iface_tos_en.attr,
657 &dev_attr_ipv4_iface_tos.attr,
658 &dev_attr_ipv4_iface_grat_arp_en.attr,
659 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
660 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
661 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
662 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
663 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
664 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
665 &dev_attr_ipv4_iface_fragment_disable.attr,
666 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
667 &dev_attr_ipv4_iface_ttl.attr,
668 &dev_attr_ipv6_iface_link_local_state.attr,
669 &dev_attr_ipv6_iface_router_state.attr,
670 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
671 &dev_attr_ipv6_iface_mld_en.attr,
672 &dev_attr_ipv6_iface_flow_label.attr,
673 &dev_attr_ipv6_iface_traffic_class.attr,
674 &dev_attr_ipv6_iface_hop_limit.attr,
675 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
676 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
677 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
678 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
679 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
8d07913d
MC		 680 NULL,
681};
682
683static struct attribute_group iscsi_iface_group = {
684 .attrs = iscsi_iface_attrs,
685 .is_visible = iscsi_iface_attr_is_visible,
686};
687
3e0f65b3
HZ		 688/* convert iscsi_ipaddress_state values to ascii string name */
689static const struct {
690 enum iscsi_ipaddress_state value;
691 char *name;
692} iscsi_ipaddress_state_names[] = {
693 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
694 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
695 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
696 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
697 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
698 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
699 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
700};
701
702char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
703{
704 int i;
705 char *state = NULL;
706
707 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
708 if (iscsi_ipaddress_state_names[i].value == port_state) {
709 state = iscsi_ipaddress_state_names[i].name;
710 break;
711 }
712 }
713 return state;
714}
715EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
716
717/* convert iscsi_router_state values to ascii string name */
718static const struct {
719 enum iscsi_router_state value;
720 char *name;
721} iscsi_router_state_names[] = {
722 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
723 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
724 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
725 {ISCSI_ROUTER_STATE_STALE, "Stale" },
726};
727
728char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
729{
730 int i;
731 char *state = NULL;
732
733 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
734 if (iscsi_router_state_names[i].value == router_state) {
735 state = iscsi_router_state_names[i].name;
736 break;
737 }
738 }
739 return state;
740}
741EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
742
8d07913d
MC		 743struct iscsi_iface *
744iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
745 uint32_t iface_type, uint32_t iface_num, int dd_size)
746{
747 struct iscsi_iface *iface;
748 int err;
749
750 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
751 if (!iface)
752 return NULL;
753
754 iface->transport = transport;
755 iface->iface_type = iface_type;
756 iface->iface_num = iface_num;
757 iface->dev.release = iscsi_iface_release;
758 iface->dev.class = &iscsi_iface_class;
759 /* parent reference released in iscsi_iface_release */
760 iface->dev.parent = get_device(&shost->shost_gendev);
761 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
762 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
763 iface_num);
764 else
765 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
766 iface_num);
767
768 err = device_register(&iface->dev);
769 if (err)
770 goto free_iface;
771
772 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
773 if (err)
774 goto unreg_iface;
775
776 if (dd_size)
777 iface->dd_data = &iface[1];
778 return iface;
779
780unreg_iface:
781 device_unregister(&iface->dev);
782 return NULL;
783
784free_iface:
785 put_device(iface->dev.parent);
786 kfree(iface);
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
c6a4bb2e
AC		 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
4c1340af 1012static struct device_type iscsi_flashnode_sess_dev_type = {
c6a4bb2e
AC		 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
4c1340af 1198static struct device_type iscsi_flashnode_conn_dev_type = {
c6a4bb2e
AC		 1199 .name = "iscsi_flashnode_conn_dev_type",
1200 .groups = iscsi_flashnode_conn_attr_groups,
1201 .release = iscsi_flashnode_conn_release,
1202};
1203
4c1340af 1204static struct bus_type iscsi_flashnode_bus;
c6a4bb2e
AC		 1205
1206int iscsi_flashnode_bus_match(struct device *dev,
1207 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
4c1340af 1215static struct bus_type iscsi_flashnode_bus = {
c6a4bb2e
AC		 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:
e227867f 1230 * pointer to allocated flashnode sess on success
c6a4bb2e
AC		 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 free_fnode_sess;
1256
1257 if (dd_size)
1258 fnode_sess->dd_data = &fnode_sess[1];
1259
1260 return fnode_sess;
1261
1262free_fnode_sess:
1263 kfree(fnode_sess);
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 free_fnode_conn;
1304
1305 if (dd_size)
1306 fnode_conn->dd_data = &fnode_conn[1];
1307
1308 return fnode_conn;
1309
1310free_fnode_conn:
1311 kfree(fnode_conn);
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 */
7a15fdfa 1327static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
c6a4bb2e
AC		 1328{
1329 return dev->bus == &iscsi_flashnode_bus;
1330}
c6a4bb2e
AC		 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
8526cb11 1356 * @idx: index to match
c6a4bb2e
AC		 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 *
8526cb11 1365iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
c6a4bb2e
AC		 1366{
1367 struct iscsi_bus_flash_session *fnode_sess = NULL;
1368 struct device *dev;
1369
8526cb11
MC		 1370 dev = device_find_child(&shost->shost_gendev, &idx,
1371 flashnode_match_index);
c6a4bb2e
AC		 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{
8526cb11 1395 return device_find_child(&shost->shost_gendev, data, fn);
c6a4bb2e
AC		 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
c6a4bb2e
AC		 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 *
8526cb11 1411iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
c6a4bb2e 1412{
8526cb11
MC		 1413 return device_find_child(&fnode_sess->dev, NULL,
1414 iscsi_is_flashnode_conn_dev);
c6a4bb2e
AC		 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/**
e227867f 1427 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
c6a4bb2e
AC		 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/**
e227867f 1457 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
c6a4bb2e
AC		 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
90eeb01a
MC		 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
eae627e4 1531 * @ihost: iscsi_cls_host adding the structures to
90eeb01a
MC		 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 request_queue *q;
1539 char bsg_name[20];
90eeb01a
MC		 1540
1541 if (!i->iscsi_transport->bsg_request)
1542 return -ENOTSUPP;
1543
1544 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
8ae94eb6
CH		 1545 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, 0);
1546 if (IS_ERR(q)) {
90eeb01a
MC		 1547 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1548 "initialize - no request queue\n");
8ae94eb6 1549 return PTR_ERR(q);
90eeb01a 1550 }
8ae94eb6 1551 __scsi_init_queue(shost, q);
90eeb01a
MC		 1552
1553 ihost->bsg_q = q;
1554 return 0;
1555}
1556
30a6c652 1557static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
ee959b00 1558 struct device *cdev)
30a6c652
MC		 1559{
1560 struct Scsi_Host *shost = dev_to_shost(dev);
32c6e1b9 1561 struct iscsi_cls_host *ihost = shost->shost_data;
30a6c652
MC		 1562
1563 memset(ihost, 0, sizeof(*ihost));
8aae18ad 1564 atomic_set(&ihost->nr_scans, 0);
7970634b 1565 mutex_init(&ihost->mutex);
90eeb01a
MC		 1566
1567 iscsi_bsg_host_add(shost, ihost);
1568 /* ignore any bsg add error - we just can't do sgio */
1569
1570 return 0;
1571}
1572
1573static int iscsi_remove_host(struct transport_container *tc,
1574 struct device *dev, struct device *cdev)
1575{
1576 struct Scsi_Host *shost = dev_to_shost(dev);
1577 struct iscsi_cls_host *ihost = shost->shost_data;
1578
1579 if (ihost->bsg_q) {
86072d81 1580 bsg_unregister_queue(ihost->bsg_q);
90eeb01a
MC		 1581 blk_cleanup_queue(ihost->bsg_q);
1582 }
30a6c652
MC		 1583 return 0;
1584}
1585
1586static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1587 "iscsi_host",
1588 iscsi_setup_host,
90eeb01a 1589 iscsi_remove_host,
30a6c652
MC		 1590 NULL);
1591
0896b752
AA		 1592static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1593 "iscsi_session",
1da177e4
LT		 1594 NULL,
1595 NULL,
1596 NULL);
1597
0896b752
AA		 1598static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1599 "iscsi_connection",
1da177e4
LT		 1600 NULL,
1601 NULL,
1602 NULL);
0896b752
AA		 1603
1604static struct sock *nls;
0b950672 1605static DEFINE_MUTEX(rx_queue_mutex);
0896b752 1606
7b7232f3
MC		 1607static LIST_HEAD(sesslist);
1608static DEFINE_SPINLOCK(sesslock);
7b8631b5
MC		 1609static LIST_HEAD(connlist);
1610static DEFINE_SPINLOCK(connlock);
0896b752 1611
b5c7a12d
MC		 1612static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1613{
1614 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1615 return sess->sid;
1616}
1617
1618/*
1619 * Returns the matching session to a given sid
1620 */
1621static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
7b7232f3
MC		 1622{
1623 unsigned long flags;
1624 struct iscsi_cls_session *sess;
1625
1626 spin_lock_irqsave(&sesslock, flags);
1627 list_for_each_entry(sess, &sesslist, sess_list) {
b5c7a12d 1628 if (sess->sid == sid) {
7b7232f3
MC		 1629 spin_unlock_irqrestore(&sesslock, flags);
1630 return sess;
1631 }
1632 }
1633 spin_unlock_irqrestore(&sesslock, flags);
1634 return NULL;
1635}
1636
b5c7a12d
MC		 1637/*
1638 * Returns the matching connection to a given sid / cid tuple
1639 */
1640static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
7b7232f3
MC		 1641{
1642 unsigned long flags;
1643 struct iscsi_cls_conn *conn;
1644
1645 spin_lock_irqsave(&connlock, flags);
1646 list_for_each_entry(conn, &connlist, conn_list) {
b5c7a12d 1647 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
7b7232f3
MC		 1648 spin_unlock_irqrestore(&connlock, flags);
1649 return conn;
1650 }
1651 }
1652 spin_unlock_irqrestore(&connlock, flags);
1653 return NULL;
1654}
1655
7b8631b5
MC		 1656/*
1657 * The following functions can be used by LLDs that allocate
1658 * their own scsi_hosts or by software iscsi LLDs
1659 */
6eabafbe
MC		 1660static struct {
1661 int value;
1662 char *name;
1663} iscsi_session_state_names[] = {
1664 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1665 { ISCSI_SESSION_FAILED, "FAILED" },
1666 { ISCSI_SESSION_FREE, "FREE" },
1667};
1668
3b0f208a 1669static const char *iscsi_session_state_name(int state)
6eabafbe
MC		 1670{
1671 int i;
1672 char *name = NULL;
1673
1674 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1675 if (iscsi_session_state_names[i].value == state) {
1676 name = iscsi_session_state_names[i].name;
1677 break;
1678 }
1679 }
1680 return name;
1681}
1682
1683int iscsi_session_chkready(struct iscsi_cls_session *session)
1684{
1685 unsigned long flags;
1686 int err;
1687
1688 spin_lock_irqsave(&session->lock, flags);
1689 switch (session->state) {
1690 case ISCSI_SESSION_LOGGED_IN:
1691 err = 0;
1692 break;
1693 case ISCSI_SESSION_FAILED:
9a1a69a1 1694 err = DID_IMM_RETRY << 16;
6eabafbe
MC		 1695 break;
1696 case ISCSI_SESSION_FREE:
56d7fcfa 1697 err = DID_TRANSPORT_FAILFAST << 16;
6eabafbe
MC		 1698 break;
1699 default:
1700 err = DID_NO_CONNECT << 16;
1701 break;
1702 }
1703 spin_unlock_irqrestore(&session->lock, flags);
1704 return err;
1705}
1706EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1707
17fa575e
MR		 1708int iscsi_is_session_online(struct iscsi_cls_session *session)
1709{
1710 unsigned long flags;
1711 int ret = 0;
1712
1713 spin_lock_irqsave(&session->lock, flags);
1714 if (session->state == ISCSI_SESSION_LOGGED_IN)
1715 ret = 1;
1716 spin_unlock_irqrestore(&session->lock, flags);
1717 return ret;
1718}
1719EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1720
7b8631b5
MC		 1721static void iscsi_session_release(struct device *dev)
1722{
1723 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
7b8631b5 1724 struct Scsi_Host *shost;
0896b752 1725
7b8631b5
MC		 1726 shost = iscsi_session_to_shost(session);
1727 scsi_host_put(shost);
632248aa 1728 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
7b8631b5 1729 kfree(session);
7b8631b5 1730}
0896b752 1731
6260a5d2 1732int iscsi_is_session_dev(const struct device *dev)
7b8631b5
MC		 1733{
1734 return dev->release == iscsi_session_release;
1735}
6260a5d2 1736EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
0896b752 1737
a4804cd6
MC		 1738static int iscsi_iter_session_fn(struct device *dev, void *data)
1739{
1740 void (* fn) (struct iscsi_cls_session *) = data;
1741
1742 if (!iscsi_is_session_dev(dev))
1743 return 0;
1744 fn(iscsi_dev_to_session(dev));
1745 return 0;
1746}
1747
1748void iscsi_host_for_each_session(struct Scsi_Host *shost,
1749 void (*fn)(struct iscsi_cls_session *))
1750{
1751 device_for_each_child(&shost->shost_gendev, fn,
1752 iscsi_iter_session_fn);
1753}
1754EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1755
8aae18ad
MC		 1756/**
1757 * iscsi_scan_finished - helper to report when running scans are done
1758 * @shost: scsi host
1759 * @time: scan run time
1760 *
1761 * This function can be used by drives like qla4xxx to report to the scsi
1762 * layer when the scans it kicked off at module load time are done.
1763 */
1764int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1765{
32c6e1b9 1766 struct iscsi_cls_host *ihost = shost->shost_data;
8aae18ad
MC		 1767 /*
1768 * qla4xxx will have kicked off some session unblocks before calling
1769 * scsi_scan_host, so just wait for them to complete.
1770 */
1771 return !atomic_read(&ihost->nr_scans);
1772}
1773EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1774
7970634b
MC		 1775struct iscsi_scan_data {
1776 unsigned int channel;
1777 unsigned int id;
9cb78c16 1778 u64 lun;
1d645088 1779 enum scsi_scan_mode rescan;
7970634b
MC		 1780};
1781
1782static int iscsi_user_scan_session(struct device *dev, void *data)
30a6c652 1783{
7970634b 1784 struct iscsi_scan_data *scan_data = data;
30a6c652 1785 struct iscsi_cls_session *session;
7970634b
MC		 1786 struct Scsi_Host *shost;
1787 struct iscsi_cls_host *ihost;
1788 unsigned long flags;
1789 unsigned int id;
1790
1791 if (!iscsi_is_session_dev(dev))
1792 return 0;
1793
1794 session = iscsi_dev_to_session(dev);
632248aa
MC		 1795
1796 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1797
7970634b
MC		 1798 shost = iscsi_session_to_shost(session);
1799 ihost = shost->shost_data;
30a6c652
MC		 1800
1801 mutex_lock(&ihost->mutex);
7970634b
MC		 1802 spin_lock_irqsave(&session->lock, flags);
1803 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1804 spin_unlock_irqrestore(&session->lock, flags);
632248aa 1805 goto user_scan_exit;
30a6c652 1806 }
7970634b
MC		 1807 id = session->target_id;
1808 spin_unlock_irqrestore(&session->lock, flags);
30a6c652 1809
7970634b
MC		 1810 if (id != ISCSI_MAX_TARGET) {
1811 if ((scan_data->channel == SCAN_WILD_CARD ||
1812 scan_data->channel == 0) &&
1813 (scan_data->id == SCAN_WILD_CARD ||
1814 scan_data->id == id))
1815 scsi_scan_target(&session->dev, 0, id,
1d645088 1816 scan_data->lun, scan_data->rescan);
7970634b 1817 }
632248aa
MC		 1818
1819user_scan_exit:
7970634b 1820 mutex_unlock(&ihost->mutex);
632248aa 1821 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
30a6c652
MC		 1822 return 0;
1823}
1824
7970634b 1825static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
9cb78c16 1826 uint id, u64 lun)
7970634b
MC		 1827{
1828 struct iscsi_scan_data scan_data;
1829
1830 scan_data.channel = channel;
1831 scan_data.id = id;
1832 scan_data.lun = lun;
1d645088 1833 scan_data.rescan = SCSI_SCAN_MANUAL;
7970634b
MC		 1834
1835 return device_for_each_child(&shost->shost_gendev, &scan_data,
1836 iscsi_user_scan_session);
1837}
1838
bd976f62
MC		 1839static void iscsi_scan_session(struct work_struct *work)
1840{
1841 struct iscsi_cls_session *session =
1842 container_of(work, struct iscsi_cls_session, scan_work);
8aae18ad 1843 struct Scsi_Host *shost = iscsi_session_to_shost(session);
32c6e1b9 1844 struct iscsi_cls_host *ihost = shost->shost_data;
7970634b 1845 struct iscsi_scan_data scan_data;
bd976f62 1846
7970634b
MC		 1847 scan_data.channel = 0;
1848 scan_data.id = SCAN_WILD_CARD;
1849 scan_data.lun = SCAN_WILD_CARD;
1d645088 1850 scan_data.rescan = SCSI_SCAN_RESCAN;
bd976f62 1851
7970634b 1852 iscsi_user_scan_session(&session->dev, &scan_data);
8aae18ad 1853 atomic_dec(&ihost->nr_scans);
bd976f62
MC		 1854}
1855
c01be6dc
MC		 1856/**
1857 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
e6d4ef45 1858 * @cmd: scsi cmd passed to scsi eh handler
c01be6dc
MC		 1859 *
1860 * If the session is down this function will wait for the recovery
1861 * timer to fire or for the session to be logged back in. If the
1862 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1863 * should pass this error value to the scsi eh.
1864 */
1865int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1866{
1867 struct iscsi_cls_session *session =
1868 starget_to_session(scsi_target(cmd->device));
1869 unsigned long flags;
1870 int ret = 0;
1871
1872 spin_lock_irqsave(&session->lock, flags);
1873 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1874 if (session->state == ISCSI_SESSION_FREE) {
1875 ret = FAST_IO_FAIL;
1876 break;
1877 }
1878 spin_unlock_irqrestore(&session->lock, flags);
1879 msleep(1000);
1880 spin_lock_irqsave(&session->lock, flags);
1881 }
1882 spin_unlock_irqrestore(&session->lock, flags);
1883 return ret;
1884}
1885EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1886
c4028958 1887static void session_recovery_timedout(struct work_struct *work)
30a6c652 1888{
c4028958
DH		 1889 struct iscsi_cls_session *session =
1890 container_of(work, struct iscsi_cls_session,
1891 recovery_work.work);
6eabafbe 1892 unsigned long flags;
30a6c652 1893
322d739d
MC		 1894 iscsi_cls_session_printk(KERN_INFO, session,
1895 "session recovery timed out after %d secs\n",
1896 session->recovery_tmo);
30a6c652 1897
6eabafbe
MC		 1898 spin_lock_irqsave(&session->lock, flags);
1899 switch (session->state) {
1900 case ISCSI_SESSION_FAILED:
1901 session->state = ISCSI_SESSION_FREE;
1902 break;
1903 case ISCSI_SESSION_LOGGED_IN:
1904 case ISCSI_SESSION_FREE:
1905 /* we raced with the unblock's flush */
1906 spin_unlock_irqrestore(&session->lock, flags);
1907 return;
1908 }
1909 spin_unlock_irqrestore(&session->lock, flags);
1910
30a6c652
MC		 1911 if (session->transport->session_recovery_timedout)
1912 session->transport->session_recovery_timedout(session);
1913
632248aa 1914 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
5d9fb5cc 1915 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
632248aa 1916 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
30a6c652
MC		 1917}
1918
45ab33b6 1919static void __iscsi_unblock_session(struct work_struct *work)
6eabafbe 1920{
45ab33b6
MC		 1921 struct iscsi_cls_session *session =
1922 container_of(work, struct iscsi_cls_session,
1923 unblock_work);
bd976f62 1924 struct Scsi_Host *shost = iscsi_session_to_shost(session);
32c6e1b9 1925 struct iscsi_cls_host *ihost = shost->shost_data;
6eabafbe
MC		 1926 unsigned long flags;
1927
632248aa 1928 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
45ab33b6
MC		 1929 /*
1930 * The recovery and unblock work get run from the same workqueue,
1931 * so try to cancel it if it was going to run after this unblock.
1932 */
1933 cancel_delayed_work(&session->recovery_work);
6eabafbe
MC		 1934 spin_lock_irqsave(&session->lock, flags);
1935 session->state = ISCSI_SESSION_LOGGED_IN;
1936 spin_unlock_irqrestore(&session->lock, flags);
45ab33b6 1937 /* start IO */
5d9fb5cc 1938 scsi_target_unblock(&session->dev, SDEV_RUNNING);
8aae18ad
MC		 1939 /*
1940 * Only do kernel scanning if the driver is properly hooked into
1941 * the async scanning code (drivers like iscsi_tcp do login and
1942 * scanning from userspace).
1943 */
1944 if (shost->hostt->scan_finished) {
06d25af4 1945 if (scsi_queue_work(shost, &session->scan_work))
8aae18ad
MC		 1946 atomic_inc(&ihost->nr_scans);
1947 }
632248aa 1948 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
6eabafbe 1949}
45ab33b6
MC		 1950
1951/**
1952 * iscsi_unblock_session - set a session as logged in and start IO.
1953 * @session: iscsi session
1954 *
1955 * Mark a session as ready to accept IO.
1956 */
1957void iscsi_unblock_session(struct iscsi_cls_session *session)
1958{
1959 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1960 /*
1961 * make sure all the events have completed before tell the driver
1962 * it is safe
1963 */
1964 flush_workqueue(iscsi_eh_timer_workq);
1965}
30a6c652
MC		 1966EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1967
45ab33b6 1968static void __iscsi_block_session(struct work_struct *work)
30a6c652 1969{
45ab33b6
MC		 1970 struct iscsi_cls_session *session =
1971 container_of(work, struct iscsi_cls_session,
1972 block_work);
6eabafbe
MC		 1973 unsigned long flags;
1974
632248aa 1975 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
6eabafbe
MC		 1976 spin_lock_irqsave(&session->lock, flags);
1977 session->state = ISCSI_SESSION_FAILED;
1978 spin_unlock_irqrestore(&session->lock, flags);
30a6c652 1979 scsi_target_block(&session->dev);
632248aa 1980 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
fdd46dcb
MC		 1981 if (session->recovery_tmo >= 0)
1982 queue_delayed_work(iscsi_eh_timer_workq,
1983 &session->recovery_work,
1984 session->recovery_tmo * HZ);
30a6c652 1985}
45ab33b6
MC		 1986
1987void iscsi_block_session(struct iscsi_cls_session *session)
1988{
1989 queue_work(iscsi_eh_timer_workq, &session->block_work);
1990}
30a6c652
MC		 1991EXPORT_SYMBOL_GPL(iscsi_block_session);
1992
26974789
MC		 1993static void __iscsi_unbind_session(struct work_struct *work)
1994{
1995 struct iscsi_cls_session *session =
1996 container_of(work, struct iscsi_cls_session,
1997 unbind_work);
1998 struct Scsi_Host *shost = iscsi_session_to_shost(session);
32c6e1b9 1999 struct iscsi_cls_host *ihost = shost->shost_data;
7970634b 2000 unsigned long flags;
8d4a690c 2001 unsigned int target_id;
26974789 2002
632248aa
MC		 2003 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2004
26974789
MC		 2005 /* Prevent new scans and make sure scanning is not in progress */
2006 mutex_lock(&ihost->mutex);
7970634b
MC		 2007 spin_lock_irqsave(&session->lock, flags);
2008 if (session->target_id == ISCSI_MAX_TARGET) {
2009 spin_unlock_irqrestore(&session->lock, flags);
26974789
MC		 2010 mutex_unlock(&ihost->mutex);
2011 return;
2012 }
8d4a690c
MC		 2013
2014 target_id = session->target_id;
7970634b
MC		 2015 session->target_id = ISCSI_MAX_TARGET;
2016 spin_unlock_irqrestore(&session->lock, flags);
26974789
MC		 2017 mutex_unlock(&ihost->mutex);
2018
8d4a690c
MC		 2019 if (session->ida_used)
2020 ida_simple_remove(&iscsi_sess_ida, target_id);
2021
26974789
MC		 2022 scsi_remove_target(&session->dev);
2023 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
632248aa 2024 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
26974789
MC		 2025}
2026
7b8631b5 2027struct iscsi_cls_session *
5d91e209
MC		 2028iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2029 int dd_size)
7b8631b5
MC		 2030{
2031 struct iscsi_cls_session *session;
7b8631b5 2032
5d91e209 2033 session = kzalloc(sizeof(*session) + dd_size,
b5c7a12d 2034 GFP_KERNEL);
7b8631b5 2035 if (!session)
f53a88da
MC		 2036 return NULL;
2037
7b8631b5 2038 session->transport = transport;
0c70d84b 2039 session->creator = -1;
30a6c652 2040 session->recovery_tmo = 120;
9c8108a4 2041 session->recovery_tmo_sysfs_override = false;
6eabafbe 2042 session->state = ISCSI_SESSION_FREE;
c4028958 2043 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
30a6c652 2044 INIT_LIST_HEAD(&session->sess_list);
45ab33b6
MC		 2045 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2046 INIT_WORK(&session->block_work, __iscsi_block_session);
26974789 2047 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
bd976f62 2048 INIT_WORK(&session->scan_work, iscsi_scan_session);
6eabafbe 2049 spin_lock_init(&session->lock);
7b8631b5 2050
6a8a0d36
MC		 2051 /* this is released in the dev's release function */
2052 scsi_host_get(shost);
8434aa8b
MC		 2053 session->dev.parent = &shost->shost_gendev;
2054 session->dev.release = iscsi_session_release;
2055 device_initialize(&session->dev);
5d91e209 2056 if (dd_size)
b5c7a12d 2057 session->dd_data = &session[1];
632248aa
MC		 2058
2059 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
8434aa8b
MC		 2060 return session;
2061}
2062EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2063
6a8a0d36 2064int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
8434aa8b 2065{
26974789 2066 unsigned long flags;
8d4a690c 2067 int id = 0;
8434aa8b 2068 int err;
b5c7a12d 2069
41be1444 2070 session->sid = atomic_add_return(1, &iscsi_session_nr);
7970634b 2071
8d4a690c
MC		 2072 if (target_id == ISCSI_MAX_TARGET) {
2073 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
7970634b 2074
8d4a690c 2075 if (id < 0) {
7970634b 2076 iscsi_cls_session_printk(KERN_ERR, session,
8d4a690c
MC		 2077 "Failure in Target ID Allocation\n");
2078 return id;
7970634b 2079 }
8d4a690c
MC		 2080 session->target_id = (unsigned int)id;
2081 session->ida_used = true;
2082 } else
2083 session->target_id = target_id;
30a6c652 2084
71610f55 2085 dev_set_name(&session->dev, "session%u", session->sid);
8434aa8b 2086 err = device_add(&session->dev);
7b8631b5 2087 if (err) {
322d739d
MC		 2088 iscsi_cls_session_printk(KERN_ERR, session,
2089 "could not register session's dev\n");
8d4a690c 2090 goto release_ida;
7b8631b5
MC		 2091 }
2092 transport_register_device(&session->dev);
2093
26974789
MC		 2094 spin_lock_irqsave(&sesslock, flags);
2095 list_add(&session->sess_list, &sesslist);
2096 spin_unlock_irqrestore(&sesslock, flags);
2097
26974789 2098 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
632248aa 2099 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
8434aa8b 2100 return 0;
30a6c652 2101
8d4a690c
MC		 2102release_ida:
2103 if (session->ida_used)
2104 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2105
8434aa8b 2106 return err;
7b8631b5 2107}
8434aa8b 2108EXPORT_SYMBOL_GPL(iscsi_add_session);
7b8631b5
MC		 2109
2110/**
8434aa8b
MC		 2111 * iscsi_create_session - create iscsi class session
2112 * @shost: scsi host
2113 * @transport: iscsi transport
5d91e209 2114 * @dd_size: private driver data size
eb44820c 2115 * @target_id: which target
7b8631b5 2116 *
8434aa8b 2117 * This can be called from a LLD or iscsi_transport.
eb44820c 2118 */
8434aa8b 2119struct iscsi_cls_session *
5d91e209
MC		 2120iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2121 int dd_size, unsigned int target_id)
8434aa8b
MC		 2122{
2123 struct iscsi_cls_session *session;
2124
5d91e209 2125 session = iscsi_alloc_session(shost, transport, dd_size);
8434aa8b
MC		 2126 if (!session)
2127 return NULL;
2128
6a8a0d36 2129 if (iscsi_add_session(session, target_id)) {
8434aa8b
MC		 2130 iscsi_free_session(session);
2131 return NULL;
2132 }
2133 return session;
2134}
2135EXPORT_SYMBOL_GPL(iscsi_create_session);
2136
26974789
MC		 2137static void iscsi_conn_release(struct device *dev)
2138{
2139 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2140 struct device *parent = conn->dev.parent;
2141
632248aa 2142 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
26974789
MC		 2143 kfree(conn);
2144 put_device(parent);
2145}
2146
2147static int iscsi_is_conn_dev(const struct device *dev)
2148{
2149 return dev->release == iscsi_conn_release;
2150}
2151
2152static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2153{
2154 if (!iscsi_is_conn_dev(dev))
2155 return 0;
2156 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2157}
2158
8434aa8b 2159void iscsi_remove_session(struct iscsi_cls_session *session)
7b8631b5 2160{
30a6c652 2161 struct Scsi_Host *shost = iscsi_session_to_shost(session);
26974789
MC		 2162 unsigned long flags;
2163 int err;
2164
632248aa
MC		 2165 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2166
26974789
MC		 2167 spin_lock_irqsave(&sesslock, flags);
2168 list_del(&session->sess_list);
2169 spin_unlock_irqrestore(&sesslock, flags);
30a6c652 2170
45ab33b6
MC		 2171 /* make sure there are no blocks/unblocks queued */
2172 flush_workqueue(iscsi_eh_timer_workq);
2173 /* make sure the timedout callout is not running */
2174 if (!cancel_delayed_work(&session->recovery_work))
2175 flush_workqueue(iscsi_eh_timer_workq);
26974789
MC		 2176 /*
2177 * If we are blocked let commands flow again. The lld or iscsi
2178 * layer should set up the queuecommand to fail commands.
45ab33b6
MC		 2179 * We assume that LLD will not be calling block/unblock while
2180 * removing the session.
26974789 2181 */
6eabafbe
MC		 2182 spin_lock_irqsave(&session->lock, flags);
2183 session->state = ISCSI_SESSION_FREE;
2184 spin_unlock_irqrestore(&session->lock, flags);
bd976f62 2185
5d9fb5cc 2186 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
45ab33b6 2187 /* flush running scans then delete devices */
06d25af4 2188 scsi_flush_work(shost);
45ab33b6 2189 __iscsi_unbind_session(&session->unbind_work);
30a6c652 2190
26974789
MC		 2191 /* hw iscsi may not have removed all connections from session */
2192 err = device_for_each_child(&session->dev, NULL,
2193 iscsi_iter_destroy_conn_fn);
2194 if (err)
322d739d
MC		 2195 iscsi_cls_session_printk(KERN_ERR, session,
2196 "Could not delete all connections "
2197 "for session. Error %d.\n", err);
8434aa8b 2198
7b8631b5 2199 transport_unregister_device(&session->dev);
632248aa
MC		 2200
2201 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
8434aa8b
MC		 2202 device_del(&session->dev);
2203}
2204EXPORT_SYMBOL_GPL(iscsi_remove_session);
2205
2206void iscsi_free_session(struct iscsi_cls_session *session)
2207{
632248aa 2208 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
26974789 2209 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
8434aa8b 2210 put_device(&session->dev);
7b8631b5 2211}
8434aa8b
MC		 2212EXPORT_SYMBOL_GPL(iscsi_free_session);
2213
2214/**
2215 * iscsi_destroy_session - destroy iscsi session
2216 * @session: iscsi_session
2217 *
2218 * Can be called by a LLD or iscsi_transport. There must not be
2219 * any running connections.
eb44820c 2220 */
8434aa8b
MC		 2221int iscsi_destroy_session(struct iscsi_cls_session *session)
2222{
2223 iscsi_remove_session(session);
632248aa 2224 ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
8434aa8b
MC		 2225 iscsi_free_session(session);
2226 return 0;
2227}
7b8631b5
MC		 2228EXPORT_SYMBOL_GPL(iscsi_destroy_session);
2229
7b8631b5
MC		 2230/**
2231 * iscsi_create_conn - create iscsi class connection
2232 * @session: iscsi cls session
5d91e209 2233 * @dd_size: private driver data size
7b8631b5
MC		 2234 * @cid: connection id
2235 *
2236 * This can be called from a LLD or iscsi_transport. The connection
2237 * is child of the session so cid must be unique for all connections
2238 * on the session.
b5c7a12d
MC		 2239 *
2240 * Since we do not support MCS, cid will normally be zero. In some cases
2241 * for software iscsi we could be trying to preallocate a connection struct
2242 * in which case there could be two connection structs and cid would be
2243 * non-zero.
eb44820c 2244 */
7b8631b5 2245struct iscsi_cls_conn *
5d91e209 2246iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
7b8631b5
MC		 2247{
2248 struct iscsi_transport *transport = session->transport;
7b8631b5 2249 struct iscsi_cls_conn *conn;
26974789 2250 unsigned long flags;
7b8631b5
MC		 2251 int err;
2252
5d91e209 2253 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
7b8631b5
MC		 2254 if (!conn)
2255 return NULL;
5d91e209 2256 if (dd_size)
7b8631b5
MC		 2257 conn->dd_data = &conn[1];
2258
22a39fbb 2259 mutex_init(&conn->ep_mutex);
7b8631b5
MC		 2260 INIT_LIST_HEAD(&conn->conn_list);
2261 conn->transport = transport;
b5c7a12d 2262 conn->cid = cid;
7b8631b5
MC		 2263
2264 /* this is released in the dev's release function */
2265 if (!get_device(&session->dev))
43a145a3 2266 goto free_conn;
b5c7a12d 2267
71610f55 2268 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
7b8631b5
MC		 2269 conn->dev.parent = &session->dev;
2270 conn->dev.release = iscsi_conn_release;
2271 err = device_register(&conn->dev);
2272 if (err) {
322d739d
MC		 2273 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2274 "register connection's dev\n");
7b8631b5
MC		 2275 goto release_parent_ref;
2276 }
2277 transport_register_device(&conn->dev);
26974789
MC		 2278
2279 spin_lock_irqsave(&connlock, flags);
2280 list_add(&conn->conn_list, &connlist);
26974789 2281 spin_unlock_irqrestore(&connlock, flags);
632248aa
MC		 2282
2283 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
7b8631b5
MC		 2284 return conn;
2285
2286release_parent_ref:
2287 put_device(&session->dev);
2288free_conn:
2289 kfree(conn);
2290 return NULL;
2291}
2292
2293EXPORT_SYMBOL_GPL(iscsi_create_conn);
2294
2295/**
2296 * iscsi_destroy_conn - destroy iscsi class connection
eb44820c 2297 * @conn: iscsi cls session
7b8631b5 2298 *
26974789 2299 * This can be called from a LLD or iscsi_transport.
eb44820c 2300 */
7b8631b5
MC		 2301int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2302{
26974789
MC		 2303 unsigned long flags;
2304
2305 spin_lock_irqsave(&connlock, flags);
26974789
MC		 2306 list_del(&conn->conn_list);
2307 spin_unlock_irqrestore(&connlock, flags);
2308
7b8631b5 2309 transport_unregister_device(&conn->dev);
632248aa 2310 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
7b8631b5
MC		 2311 device_unregister(&conn->dev);
2312 return 0;
2313}
7b8631b5
MC		 2314EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2315
7b8631b5
MC		 2316/*
2317 * iscsi interface functions
2318 */
0896b752
AA		 2319static struct iscsi_internal *
2320iscsi_if_transport_lookup(struct iscsi_transport *tt)
2321{
2322 struct iscsi_internal *priv;
2323 unsigned long flags;
2324
2325 spin_lock_irqsave(&iscsi_transport_lock, flags);
2326 list_for_each_entry(priv, &iscsi_transports, list) {
2327 if (tt == priv->iscsi_transport) {
2328 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2329 return priv;
2330 }
2331 }
2332 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2333 return NULL;
2334}
1da177e4 2335
53cb8a1f 2336static int
43514774 2337iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
53cb8a1f 2338{
43514774 2339 return nlmsg_multicast(nls, skb, 0, group, gfp);
1da177e4 2340}
1da177e4 2341
7b7232f3 2342int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
0896b752 2343 char *data, uint32_t data_size)
1da177e4 2344{
0896b752
AA		 2345 struct nlmsghdr *nlh;
2346 struct sk_buff *skb;
2347 struct iscsi_uevent *ev;
0896b752 2348 char *pdu;
790f39a2 2349 struct iscsi_internal *priv;
e07ebea0
H		 2350 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2351 data_size);
0896b752 2352
790f39a2
MC		 2353 priv = iscsi_if_transport_lookup(conn->transport);
2354 if (!priv)
2355 return -EINVAL;
2356
43a145a3 2357 skb = alloc_skb(len, GFP_ATOMIC);
0896b752 2358 if (!skb) {
e5bd7b54 2359 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
322d739d
MC		 2360 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2361 "control PDU: OOM\n");
0896b752
AA		 2362 return -ENOMEM;
2363 }
1da177e4 2364
43514774 2365 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2366 ev = nlmsg_data(nlh);
0896b752
AA		 2367 memset(ev, 0, sizeof(*ev));
2368 ev->transport_handle = iscsi_handle(conn->transport);
2369 ev->type = ISCSI_KEVENT_RECV_PDU;
b5c7a12d
MC		 2370 ev->r.recv_req.cid = conn->cid;
2371 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
0896b752
AA		 2372 pdu = (char*)ev + sizeof(*ev);
2373 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2374 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
1da177e4 2375
43514774 2376 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
1da177e4 2377}
0896b752 2378EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
1da177e4 2379
43514774
MC		 2380int iscsi_offload_mesg(struct Scsi_Host *shost,
2381 struct iscsi_transport *transport, uint32_t type,
2382 char *data, uint16_t data_size)
2383{
2384 struct nlmsghdr *nlh;
2385 struct sk_buff *skb;
2386 struct iscsi_uevent *ev;
e07ebea0 2387 int len = nlmsg_total_size(sizeof(*ev) + data_size);
43514774 2388
a541f840 2389 skb = alloc_skb(len, GFP_ATOMIC);
43514774
MC		 2390 if (!skb) {
2391 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2392 return -ENOMEM;
2393 }
2394
2395 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2396 ev = nlmsg_data(nlh);
43514774
MC		 2397 memset(ev, 0, sizeof(*ev));
2398 ev->type = type;
2399 ev->transport_handle = iscsi_handle(transport);
2400 switch (type) {
2401 case ISCSI_KEVENT_PATH_REQ:
2402 ev->r.req_path.host_no = shost->host_no;
2403 break;
2404 case ISCSI_KEVENT_IF_DOWN:
2405 ev->r.notify_if_down.host_no = shost->host_no;
2406 break;
2407 }
2408
2409 memcpy((char *)ev + sizeof(*ev), data, data_size);
2410
a541f840 2411 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
43514774
MC		 2412}
2413EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2414
e5bd7b54 2415void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
1da177e4 2416{
0896b752
AA		 2417 struct nlmsghdr *nlh;
2418 struct sk_buff *skb;
2419 struct iscsi_uevent *ev;
790f39a2 2420 struct iscsi_internal *priv;
e07ebea0 2421 int len = nlmsg_total_size(sizeof(*ev));
0896b752 2422
790f39a2
MC		 2423 priv = iscsi_if_transport_lookup(conn->transport);
2424 if (!priv)
2425 return;
2426
43a145a3 2427 skb = alloc_skb(len, GFP_ATOMIC);
0896b752 2428 if (!skb) {
322d739d
MC		 2429 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2430 "conn error (%d)\n", error);
0896b752
AA		 2431 return;
2432 }
2433
43514774 2434 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2435 ev = nlmsg_data(nlh);
0896b752
AA		 2436 ev->transport_handle = iscsi_handle(conn->transport);
2437 ev->type = ISCSI_KEVENT_CONN_ERROR;
0896b752 2438 ev->r.connerror.error = error;
b5c7a12d
MC		 2439 ev->r.connerror.cid = conn->cid;
2440 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
1da177e4 2441
43514774 2442 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
1da177e4 2443
322d739d
MC		 2444 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2445 error);
0896b752 2446}
e5bd7b54 2447EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
0896b752 2448
17fa575e
MR		 2449void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2450 enum iscsi_conn_state state)
2451{
2452 struct nlmsghdr *nlh;
2453 struct sk_buff *skb;
2454 struct iscsi_uevent *ev;
2455 struct iscsi_internal *priv;
e07ebea0 2456 int len = nlmsg_total_size(sizeof(*ev));
17fa575e
MR		 2457
2458 priv = iscsi_if_transport_lookup(conn->transport);
2459 if (!priv)
2460 return;
2461
2462 skb = alloc_skb(len, GFP_ATOMIC);
2463 if (!skb) {
2464 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2465 "conn login (%d)\n", state);
2466 return;
2467 }
2468
2469 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2470 ev = nlmsg_data(nlh);
17fa575e
MR		 2471 ev->transport_handle = iscsi_handle(conn->transport);
2472 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2473 ev->r.conn_login.state = state;
2474 ev->r.conn_login.cid = conn->cid;
2475 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2476 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2477
2478 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2479 state);
2480}
2481EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2482
a11e2545
VC		 2483void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2484 enum iscsi_host_event_code code, uint32_t data_size,
2485 uint8_t *data)
2486{
2487 struct nlmsghdr *nlh;
2488 struct sk_buff *skb;
2489 struct iscsi_uevent *ev;
e07ebea0 2490 int len = nlmsg_total_size(sizeof(*ev) + data_size);
a11e2545 2491
49d0e64b 2492 skb = alloc_skb(len, GFP_NOIO);
a11e2545
VC		 2493 if (!skb) {
2494 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2495 host_no, code);
2496 return;
2497 }
2498
2499 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2500 ev = nlmsg_data(nlh);
a11e2545
VC		 2501 ev->transport_handle = iscsi_handle(transport);
2502 ev->type = ISCSI_KEVENT_HOST_EVENT;
2503 ev->r.host_event.host_no = host_no;
2504 ev->r.host_event.code = code;
2505 ev->r.host_event.data_size = data_size;
2506
2507 if (data_size)
2508 memcpy((char *)ev + sizeof(*ev), data, data_size);
2509
49d0e64b 2510 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
a11e2545
VC		 2511}
2512EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2513
ac20c7bf
VC		 2514void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2515 uint32_t status, uint32_t pid, uint32_t data_size,
2516 uint8_t *data)
2517{
2518 struct nlmsghdr *nlh;
2519 struct sk_buff *skb;
2520 struct iscsi_uevent *ev;
e07ebea0 2521 int len = nlmsg_total_size(sizeof(*ev) + data_size);
ac20c7bf 2522
49d0e64b 2523 skb = alloc_skb(len, GFP_NOIO);
ac20c7bf
VC		 2524 if (!skb) {
2525 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2526 return;
2527 }
2528
2529 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2530 ev = nlmsg_data(nlh);
ac20c7bf
VC		 2531 ev->transport_handle = iscsi_handle(transport);
2532 ev->type = ISCSI_KEVENT_PING_COMP;
2533 ev->r.ping_comp.host_no = host_no;
2534 ev->r.ping_comp.status = status;
2535 ev->r.ping_comp.pid = pid;
2536 ev->r.ping_comp.data_size = data_size;
2537 memcpy((char *)ev + sizeof(*ev), data, data_size);
2538
49d0e64b 2539 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
ac20c7bf
VC		 2540}
2541EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2542
0896b752 2543static int
43514774
MC		 2544iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
2545 void *payload, int size)
0896b752
AA		 2546{
2547 struct sk_buff *skb;
2548 struct nlmsghdr *nlh;
e07ebea0 2549 int len = nlmsg_total_size(size);
0896b752
AA		 2550 int flags = multi ? NLM_F_MULTI : 0;
2551 int t = done ? NLMSG_DONE : type;
2552
43a145a3 2553 skb = alloc_skb(len, GFP_ATOMIC);
239a7dc2
MC		 2554 if (!skb) {
2555 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2556 return -ENOMEM;
2557 }
0896b752 2558
43514774 2559 nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
0896b752 2560 nlh->nlmsg_flags = flags;
e07ebea0 2561 memcpy(nlmsg_data(nlh), payload, size);
43514774 2562 return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
1da177e4 2563}
1da177e4 2564
7b8631b5 2565static int
5b940adf 2566iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
7b8631b5 2567{
e07ebea0 2568 struct iscsi_uevent *ev = nlmsg_data(nlh);
7b8631b5
MC		 2569 struct iscsi_stats *stats;
2570 struct sk_buff *skbstat;
2571 struct iscsi_cls_conn *conn;
2572 struct nlmsghdr *nlhstat;
2573 struct iscsi_uevent *evstat;
790f39a2 2574 struct iscsi_internal *priv;
e07ebea0
H		 2575 int len = nlmsg_total_size(sizeof(*ev) +
2576 sizeof(struct iscsi_stats) +
2577 sizeof(struct iscsi_stats_custom) *
2578 ISCSI_STATS_CUSTOM_MAX);
7b8631b5 2579 int err = 0;
0896b752 2580
790f39a2
MC		 2581 priv = iscsi_if_transport_lookup(transport);
2582 if (!priv)
2583 return -EINVAL;
2584
b5c7a12d 2585 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
7b8631b5
MC		 2586 if (!conn)
2587 return -EEXIST;
0896b752 2588
7b8631b5
MC		 2589 do {
2590 int actual_size;
0896b752 2591
43a145a3 2592 skbstat = alloc_skb(len, GFP_ATOMIC);
7b8631b5 2593 if (!skbstat) {
322d739d
MC		 2594 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2595 "deliver stats: OOM\n");
7b8631b5
MC		 2596 return -ENOMEM;
2597 }
2598
43514774 2599 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
7b8631b5 2600 (len - sizeof(*nlhstat)), 0);
e07ebea0 2601 evstat = nlmsg_data(nlhstat);
7b8631b5
MC		 2602 memset(evstat, 0, sizeof(*evstat));
2603 evstat->transport_handle = iscsi_handle(conn->transport);
2604 evstat->type = nlh->nlmsg_type;
b5c7a12d
MC		 2605 evstat->u.get_stats.cid =
2606 ev->u.get_stats.cid;
2607 evstat->u.get_stats.sid =
2608 ev->u.get_stats.sid;
7b8631b5
MC		 2609 stats = (struct iscsi_stats *)
2610 ((char*)evstat + sizeof(*evstat));
2611 memset(stats, 0, sizeof(*stats));
2612
7b7232f3 2613 transport->get_stats(conn, stats);
e07ebea0
H		 2614 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2615 sizeof(struct iscsi_stats) +
2616 sizeof(struct iscsi_stats_custom) *
2617 stats->custom_length);
7b8631b5 2618 actual_size -= sizeof(*nlhstat);
e07ebea0 2619 actual_size = nlmsg_msg_size(actual_size);
5b940adf 2620 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
7b8631b5
MC		 2621 nlhstat->nlmsg_len = actual_size;
2622
43514774
MC		 2623 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2624 GFP_ATOMIC);
7b8631b5
MC		 2625 } while (err < 0 && err != -ECONNREFUSED);
2626
2627 return err;
0896b752
AA		 2628}
2629
53cb8a1f 2630/**
26974789
MC		 2631 * iscsi_session_event - send session destr. completion event
2632 * @session: iscsi class session
2633 * @event: type of event
eb44820c 2634 */
26974789
MC		 2635int iscsi_session_event(struct iscsi_cls_session *session,
2636 enum iscsi_uevent_e event)
53cb8a1f
MC		 2637{
2638 struct iscsi_internal *priv;
53cb8a1f
MC		 2639 struct Scsi_Host *shost;
2640 struct iscsi_uevent *ev;
2641 struct sk_buff *skb;
2642 struct nlmsghdr *nlh;
e07ebea0 2643 int rc, len = nlmsg_total_size(sizeof(*ev));
53cb8a1f 2644
26974789 2645 priv = iscsi_if_transport_lookup(session->transport);
53cb8a1f
MC		 2646 if (!priv)
2647 return -EINVAL;
53cb8a1f
MC		 2648 shost = iscsi_session_to_shost(session);
2649
43a145a3 2650 skb = alloc_skb(len, GFP_KERNEL);
53cb8a1f 2651 if (!skb) {
322d739d
MC		 2652 iscsi_cls_session_printk(KERN_ERR, session,
2653 "Cannot notify userspace of session "
2654 "event %u\n", event);
53cb8a1f
MC		 2655 return -ENOMEM;
2656 }
2657
43514774 2658 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2659 ev = nlmsg_data(nlh);
26974789 2660 ev->transport_handle = iscsi_handle(session->transport);
53cb8a1f 2661
26974789
MC		 2662 ev->type = event;
2663 switch (event) {
2664 case ISCSI_KEVENT_DESTROY_SESSION:
2665 ev->r.d_session.host_no = shost->host_no;
2666 ev->r.d_session.sid = session->sid;
2667 break;
2668 case ISCSI_KEVENT_CREATE_SESSION:
2669 ev->r.c_session_ret.host_no = shost->host_no;
2670 ev->r.c_session_ret.sid = session->sid;
2671 break;
2672 case ISCSI_KEVENT_UNBIND_SESSION:
2673 ev->r.unbind_session.host_no = shost->host_no;
2674 ev->r.unbind_session.sid = session->sid;
2675 break;
2676 default:
322d739d
MC		 2677 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2678 "%u.\n", event);
26974789 2679 kfree_skb(skb);
53cb8a1f 2680 return -EINVAL;
53cb8a1f
MC		 2681 }
2682
53cb8a1f
MC		 2683 /*
2684 * this will occur if the daemon is not up, so we just warn
2685 * the user and when the daemon is restarted it will handle it
2686 */
43514774 2687 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
ff491a73 2688 if (rc == -ESRCH)
322d739d
MC		 2689 iscsi_cls_session_printk(KERN_ERR, session,
2690 "Cannot notify userspace of session "
2691 "event %u. Check iscsi daemon\n",
2692 event);
632248aa
MC		 2693
2694 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2695 event, rc);
53cb8a1f
MC		 2696 return rc;
2697}
26974789 2698EXPORT_SYMBOL_GPL(iscsi_session_event);
53cb8a1f 2699
0896b752 2700static int
d82ff9be 2701iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
0c70d84b
MC		 2702 struct iscsi_uevent *ev, pid_t pid,
2703 uint32_t initial_cmdsn, uint16_t cmds_max,
2704 uint16_t queue_depth)
0896b752
AA		 2705{
2706 struct iscsi_transport *transport = priv->iscsi_transport;
7b7232f3 2707 struct iscsi_cls_session *session;
5e7facb7 2708 struct Scsi_Host *shost;
0896b752 2709
d82ff9be 2710 session = transport->create_session(ep, cmds_max, queue_depth,
5e7facb7 2711 initial_cmdsn);
7b7232f3 2712 if (!session)
7b8631b5 2713 return -ENOMEM;
0896b752 2714
0c70d84b 2715 session->creator = pid;
5e7facb7
MC		 2716 shost = iscsi_session_to_shost(session);
2717 ev->r.c_session_ret.host_no = shost->host_no;
b5c7a12d 2718 ev->r.c_session_ret.sid = session->sid;
632248aa
MC		 2719 ISCSI_DBG_TRANS_SESSION(session,
2720 "Completed creating transport session\n");
0896b752 2721 return 0;
0896b752
AA		 2722}
2723
2724static int
7b7232f3 2725iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
0896b752 2726{
7b8631b5 2727 struct iscsi_cls_conn *conn;
7b7232f3 2728 struct iscsi_cls_session *session;
7b8631b5 2729
b5c7a12d
MC		 2730 session = iscsi_session_lookup(ev->u.c_conn.sid);
2731 if (!session) {
322d739d 2732 printk(KERN_ERR "iscsi: invalid session %d.\n",
b5c7a12d 2733 ev->u.c_conn.sid);
7b8631b5 2734 return -EINVAL;
b5c7a12d 2735 }
0896b752 2736
7b7232f3 2737 conn = transport->create_conn(session, ev->u.c_conn.cid);
b5c7a12d 2738 if (!conn) {
322d739d
MC		 2739 iscsi_cls_session_printk(KERN_ERR, session,
2740 "couldn't create a new connection.");
7b7232f3 2741 return -ENOMEM;
b5c7a12d 2742 }
0896b752 2743
b5c7a12d
MC		 2744 ev->r.c_conn_ret.sid = session->sid;
2745 ev->r.c_conn_ret.cid = conn->cid;
632248aa
MC		 2746
2747 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
0896b752 2748 return 0;
1da177e4
LT		 2749}
2750
0896b752
AA		 2751static int
2752iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2753{
7b8631b5 2754 struct iscsi_cls_conn *conn;
0896b752 2755
b5c7a12d 2756 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
0896b752 2757 if (!conn)
7b8631b5 2758 return -EINVAL;
0896b752 2759
632248aa 2760 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
7b8631b5
MC		 2761 if (transport->destroy_conn)
2762 transport->destroy_conn(conn);
632248aa 2763
7b8631b5 2764 return 0;
0896b752
AA		 2765}
2766
fd7255f5
MC		 2767static int
2768iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2769{
2770 char *data = (char*)ev + sizeof(*ev);
2771 struct iscsi_cls_conn *conn;
2772 struct iscsi_cls_session *session;
a54a52ca 2773 int err = 0, value = 0;
fd7255f5
MC		 2774
2775 session = iscsi_session_lookup(ev->u.set_param.sid);
2776 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2777 if (!conn || !session)
2778 return -EINVAL;
2779
2780 switch (ev->u.set_param.param) {
30a6c652 2781 case ISCSI_PARAM_SESS_RECOVERY_TMO:
a54a52ca 2782 sscanf(data, "%d", &value);
9c8108a4
CL		 2783 if (!session->recovery_tmo_sysfs_override)
2784 session->recovery_tmo = value;
30a6c652 2785 break;
fd7255f5 2786 default:
a54a52ca
MC		 2787 err = transport->set_param(conn, ev->u.set_param.param,
2788 data, ev->u.set_param.len);
fd7255f5
MC		 2789 }
2790
2791 return err;
2792}
2793
10eb0f01
MC		 2794static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2795 struct iscsi_uevent *ev, int msg_type)
2796{
2797 struct iscsi_endpoint *ep;
2798 struct sockaddr *dst_addr;
2799 struct Scsi_Host *shost = NULL;
2800 int non_blocking, err = 0;
2801
2802 if (!transport->ep_connect)
2803 return -EINVAL;
2804
2805 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2806 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2807 if (!shost) {
2808 printk(KERN_ERR "ep connect failed. Could not find "
2809 "host no %u\n",
2810 ev->u.ep_connect_through_host.host_no);
2811 return -ENODEV;
2812 }
2813 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2814 } else
2815 non_blocking = ev->u.ep_connect.non_blocking;
2816
2817 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2818 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2819 if (IS_ERR(ep)) {
2820 err = PTR_ERR(ep);
2821 goto release_host;
2822 }
2823
2824 ev->r.ep_connect_ret.handle = ep->id;
2825release_host:
2826 if (shost)
2827 scsi_host_put(shost);
2828 return err;
2829}
2830
22a39fbb
MC		 2831static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2832 u64 ep_handle)
2833{
2834 struct iscsi_cls_conn *conn;
2835 struct iscsi_endpoint *ep;
2836
2837 if (!transport->ep_disconnect)
2838 return -EINVAL;
2839
2840 ep = iscsi_lookup_endpoint(ep_handle);
2841 if (!ep)
2842 return -EINVAL;
2843 conn = ep->conn;
2844 if (conn) {
2845 mutex_lock(&conn->ep_mutex);
2846 conn->ep = NULL;
2847 mutex_unlock(&conn->ep_mutex);
2848 }
2849
2850 transport->ep_disconnect(ep);
2851 return 0;
2852}
2853
264faaaa
OG		 2854static int
2855iscsi_if_transport_ep(struct iscsi_transport *transport,
2856 struct iscsi_uevent *ev, int msg_type)
2857{
d82ff9be 2858 struct iscsi_endpoint *ep;
264faaaa
OG		 2859 int rc = 0;
2860
2861 switch (msg_type) {
10eb0f01 2862 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
264faaaa 2863 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
10eb0f01 2864 rc = iscsi_if_ep_connect(transport, ev, msg_type);
264faaaa
OG		 2865 break;
2866 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2867 if (!transport->ep_poll)
2868 return -EINVAL;
2869
d82ff9be
MC		 2870 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2871 if (!ep)
2872 return -EINVAL;
2873
2874 ev->r.retcode = transport->ep_poll(ep,
264faaaa
OG		 2875 ev->u.ep_poll.timeout_ms);
2876 break;
2877 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
22a39fbb
MC		 2878 rc = iscsi_if_ep_disconnect(transport,
2879 ev->u.ep_disconnect.ep_handle);
264faaaa
OG		 2880 break;
2881 }
2882 return rc;
2883}
2884
01cb225d
MC		 2885static int
2886iscsi_tgt_dscvr(struct iscsi_transport *transport,
2887 struct iscsi_uevent *ev)
2888{
2174a04e 2889 struct Scsi_Host *shost;
01cb225d 2890 struct sockaddr *dst_addr;
2174a04e 2891 int err;
01cb225d
MC		 2892
2893 if (!transport->tgt_dscvr)
2894 return -EINVAL;
2895
2174a04e 2896 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
315cb0ad 2897 if (!shost) {
2174a04e
MC		 2898 printk(KERN_ERR "target discovery could not find host no %u\n",
2899 ev->u.tgt_dscvr.host_no);
2900 return -ENODEV;
2901 }
2902
2903
01cb225d 2904 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2174a04e
MC		 2905 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2906 ev->u.tgt_dscvr.enable, dst_addr);
2907 scsi_host_put(shost);
2908 return err;
01cb225d
MC		 2909}
2910
1d9bf13a
MC		 2911static int
2912iscsi_set_host_param(struct iscsi_transport *transport,
2913 struct iscsi_uevent *ev)
2914{
2915 char *data = (char*)ev + sizeof(*ev);
2916 struct Scsi_Host *shost;
2917 int err;
2918
2919 if (!transport->set_host_param)
2920 return -ENOSYS;
2921
2922 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
315cb0ad 2923 if (!shost) {
1d9bf13a
MC		 2924 printk(KERN_ERR "set_host_param could not find host no %u\n",
2925 ev->u.set_host_param.host_no);
2926 return -ENODEV;
2927 }
2928
2929 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2930 data, ev->u.set_host_param.len);
2931 scsi_host_put(shost);
2932 return err;
2933}
2934
0896b752 2935static int
43514774
MC		 2936iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2937{
2938 struct Scsi_Host *shost;
2939 struct iscsi_path *params;
2940 int err;
2941
2942 if (!transport->set_path)
2943 return -ENOSYS;
2944
2945 shost = scsi_host_lookup(ev->u.set_path.host_no);
2946 if (!shost) {
2947 printk(KERN_ERR "set path could not find host no %u\n",
2948 ev->u.set_path.host_no);
2949 return -ENODEV;
2950 }
2951
2952 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2953 err = transport->set_path(shost, params);
2954
2955 scsi_host_put(shost);
2956 return err;
2957}
2958
56c155b5
MC		 2959static int
2960iscsi_set_iface_params(struct iscsi_transport *transport,
00c31889 2961 struct iscsi_uevent *ev, uint32_t len)
56c155b5
MC		 2962{
2963 char *data = (char *)ev + sizeof(*ev);
2964 struct Scsi_Host *shost;
2965 int err;
2966
2967 if (!transport->set_iface_param)
2968 return -ENOSYS;
2969
2970 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2971 if (!shost) {
2972 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2973 ev->u.set_iface_params.host_no);
2974 return -ENODEV;
2975 }
2976
00c31889 2977 err = transport->set_iface_param(shost, data, len);
56c155b5
MC		 2978 scsi_host_put(shost);
2979 return err;
2980}
2981
ac20c7bf
VC		 2982static int
2983iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2984{
2985 struct Scsi_Host *shost;
2986 struct sockaddr *dst_addr;
2987 int err;
2988
2989 if (!transport->send_ping)
2990 return -ENOSYS;
2991
2992 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
2993 if (!shost) {
2994 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
2995 ev->u.iscsi_ping.host_no);
2996 return -ENODEV;
2997 }
2998
2999 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3000 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3001 ev->u.iscsi_ping.iface_type,
3002 ev->u.iscsi_ping.payload_size,
3003 ev->u.iscsi_ping.pid,
3004 dst_addr);
3005 scsi_host_put(shost);
3006 return err;
3007}
3008
6260a5d2
NJ		 3009static int
3010iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3011{
e07ebea0 3012 struct iscsi_uevent *ev = nlmsg_data(nlh);
6260a5d2
NJ		 3013 struct Scsi_Host *shost = NULL;
3014 struct iscsi_chap_rec *chap_rec;
3015 struct iscsi_internal *priv;
3016 struct sk_buff *skbchap;
3017 struct nlmsghdr *nlhchap;
3018 struct iscsi_uevent *evchap;
3019 uint32_t chap_buf_size;
3020 int len, err = 0;
3021 char *buf;
3022
3023 if (!transport->get_chap)
3024 return -EINVAL;
3025
3026 priv = iscsi_if_transport_lookup(transport);
3027 if (!priv)
3028 return -EINVAL;
3029
3030 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
e07ebea0 3031 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
6260a5d2
NJ		 3032
3033 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3034 if (!shost) {
804ff603 3035 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
6260a5d2
NJ		 3036 __func__, ev->u.get_chap.host_no);
3037 return -ENODEV;
3038 }
3039
3040 do {
3041 int actual_size;
3042
3043 skbchap = alloc_skb(len, GFP_KERNEL);
3044 if (!skbchap) {
3045 printk(KERN_ERR "can not deliver chap: OOM\n");
3046 err = -ENOMEM;
3047 goto exit_get_chap;
3048 }
3049
3050 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3051 (len - sizeof(*nlhchap)), 0);
e07ebea0 3052 evchap = nlmsg_data(nlhchap);
6260a5d2
NJ		 3053 memset(evchap, 0, sizeof(*evchap));
3054 evchap->transport_handle = iscsi_handle(transport);
3055 evchap->type = nlh->nlmsg_type;
3056 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3057 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3058 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
a799cb77 3059 buf = (char *)evchap + sizeof(*evchap);
6260a5d2
NJ		 3060 memset(buf, 0, chap_buf_size);
3061
3062 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3063 &evchap->u.get_chap.num_entries, buf);
3064
e07ebea0 3065 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
6260a5d2
NJ		 3066 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3067 nlhchap->nlmsg_len = actual_size;
3068
3069 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3070 GFP_KERNEL);
3071 } while (err < 0 && err != -ECONNREFUSED);
3072
3073exit_get_chap:
3074 scsi_host_put(shost);
3075 return err;
3076}
3077
3af142fe
AC		 3078static int iscsi_set_chap(struct iscsi_transport *transport,
3079 struct iscsi_uevent *ev, uint32_t len)
3080{
3081 char *data = (char *)ev + sizeof(*ev);
3082 struct Scsi_Host *shost;
3083 int err = 0;
3084
3085 if (!transport->set_chap)
3086 return -ENOSYS;
3087
3088 shost = scsi_host_lookup(ev->u.set_path.host_no);
3089 if (!shost) {
3090 pr_err("%s could not find host no %u\n",
3091 __func__, ev->u.set_path.host_no);
3092 return -ENODEV;
3093 }
3094
3095 err = transport->set_chap(shost, data, len);
3096 scsi_host_put(shost);
3097 return err;
3098}
3099
6260a5d2
NJ		 3100static int iscsi_delete_chap(struct iscsi_transport *transport,
3101 struct iscsi_uevent *ev)
3102{
3103 struct Scsi_Host *shost;
3104 int err = 0;
3105
3106 if (!transport->delete_chap)
3107 return -ENOSYS;
3108
3109 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3110 if (!shost) {
3111 printk(KERN_ERR "%s could not find host no %u\n",
3112 __func__, ev->u.delete_chap.host_no);
3113 return -ENODEV;
3114 }
3115
3116 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3117 scsi_host_put(shost);
3118 return err;
3119}
3120
c6a4bb2e
AC		 3121static const struct {
3122 enum iscsi_discovery_parent_type value;
3123 char *name;
3124} iscsi_discovery_parent_names[] = {
3125 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3126 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3127 {ISCSI_DISC_PARENT_ISNS, "isns" },
3128};
3129
3130char *iscsi_get_discovery_parent_name(int parent_type)
3131{
3132 int i;
3133 char *state = "Unknown!";
3134
3135 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3136 if (iscsi_discovery_parent_names[i].value & parent_type) {
3137 state = iscsi_discovery_parent_names[i].name;
3138 break;
3139 }
3140 }
3141 return state;
3142}
3143EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3144
3145static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3146 struct iscsi_uevent *ev, uint32_t len)
3147{
3148 char *data = (char *)ev + sizeof(*ev);
3149 struct Scsi_Host *shost;
3150 struct iscsi_bus_flash_session *fnode_sess;
3151 struct iscsi_bus_flash_conn *fnode_conn;
3152 struct device *dev;
8526cb11 3153 uint32_t idx;
c6a4bb2e
AC		 3154 int err = 0;
3155
3156 if (!transport->set_flashnode_param) {
3157 err = -ENOSYS;
3158 goto exit_set_fnode;
3159 }
3160
3161 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3162 if (!shost) {
3163 pr_err("%s could not find host no %u\n",
3164 __func__, ev->u.set_flashnode.host_no);
3165 err = -ENODEV;
3166 goto put_host;
3167 }
3168
8526cb11
MC		 3169 idx = ev->u.set_flashnode.flashnode_idx;
3170 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
c6a4bb2e
AC		 3171 if (!fnode_sess) {
3172 pr_err("%s could not find flashnode %u for host no %u\n",
8526cb11 3173 __func__, idx, ev->u.set_flashnode.host_no);
c6a4bb2e
AC		 3174 err = -ENODEV;
3175 goto put_host;
3176 }
3177
8526cb11 3178 dev = iscsi_find_flashnode_conn(fnode_sess);
c6a4bb2e
AC		 3179 if (!dev) {
3180 err = -ENODEV;
8526cb11 3181 goto put_sess;
c6a4bb2e
AC		 3182 }
3183
3184 fnode_conn = iscsi_dev_to_flash_conn(dev);
3185 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
8526cb11
MC		 3186 put_device(dev);
3187
3188put_sess:
3189 put_device(&fnode_sess->dev);
c6a4bb2e
AC		 3190
3191put_host:
3192 scsi_host_put(shost);
3193
3194exit_set_fnode:
3195 return err;
3196}
3197
3198static int iscsi_new_flashnode(struct iscsi_transport *transport,
3199 struct iscsi_uevent *ev, uint32_t len)
3200{
3201 char *data = (char *)ev + sizeof(*ev);
3202 struct Scsi_Host *shost;
3203 int index;
3204 int err = 0;
3205
3206 if (!transport->new_flashnode) {
3207 err = -ENOSYS;
3208 goto exit_new_fnode;
3209 }
3210
3211 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3212 if (!shost) {
3213 pr_err("%s could not find host no %u\n",
3214 __func__, ev->u.new_flashnode.host_no);
3215 err = -ENODEV;
3216 goto put_host;
3217 }
3218
3219 index = transport->new_flashnode(shost, data, len);
3220
3221 if (index >= 0)
3222 ev->r.new_flashnode_ret.flashnode_idx = index;
3223 else
3224 err = -EIO;
3225
3226put_host:
3227 scsi_host_put(shost);
3228
3229exit_new_fnode:
3230 return err;
3231}
3232
3233static int iscsi_del_flashnode(struct iscsi_transport *transport,
3234 struct iscsi_uevent *ev)
3235{
3236 struct Scsi_Host *shost;
3237 struct iscsi_bus_flash_session *fnode_sess;
8526cb11 3238 uint32_t idx;
c6a4bb2e
AC		 3239 int err = 0;
3240
3241 if (!transport->del_flashnode) {
3242 err = -ENOSYS;
3243 goto exit_del_fnode;
3244 }
3245
3246 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3247 if (!shost) {
3248 pr_err("%s could not find host no %u\n",
3249 __func__, ev->u.del_flashnode.host_no);
3250 err = -ENODEV;
3251 goto put_host;
3252 }
3253
8526cb11
MC		 3254 idx = ev->u.del_flashnode.flashnode_idx;
3255 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
c6a4bb2e
AC		 3256 if (!fnode_sess) {
3257 pr_err("%s could not find flashnode %u for host no %u\n",
8526cb11 3258 __func__, idx, ev->u.del_flashnode.host_no);
c6a4bb2e
AC		 3259 err = -ENODEV;
3260 goto put_host;
3261 }
3262
3263 err = transport->del_flashnode(fnode_sess);
8526cb11 3264 put_device(&fnode_sess->dev);
c6a4bb2e
AC		 3265
3266put_host:
3267 scsi_host_put(shost);
3268
3269exit_del_fnode:
3270 return err;
3271}
3272
3273static int iscsi_login_flashnode(struct iscsi_transport *transport,
3274 struct iscsi_uevent *ev)
3275{
3276 struct Scsi_Host *shost;
3277 struct iscsi_bus_flash_session *fnode_sess;
3278 struct iscsi_bus_flash_conn *fnode_conn;
3279 struct device *dev;
8526cb11 3280 uint32_t idx;
c6a4bb2e
AC		 3281 int err = 0;
3282
3283 if (!transport->login_flashnode) {
3284 err = -ENOSYS;
3285 goto exit_login_fnode;
3286 }
3287
3288 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3289 if (!shost) {
3290 pr_err("%s could not find host no %u\n",
3291 __func__, ev->u.login_flashnode.host_no);
3292 err = -ENODEV;
3293 goto put_host;
3294 }
3295
8526cb11
MC		 3296 idx = ev->u.login_flashnode.flashnode_idx;
3297 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
c6a4bb2e
AC		 3298 if (!fnode_sess) {
3299 pr_err("%s could not find flashnode %u for host no %u\n",
8526cb11 3300 __func__, idx, ev->u.login_flashnode.host_no);
c6a4bb2e
AC		 3301 err = -ENODEV;
3302 goto put_host;
3303 }
3304
8526cb11 3305 dev = iscsi_find_flashnode_conn(fnode_sess);
c6a4bb2e
AC		 3306 if (!dev) {
3307 err = -ENODEV;
8526cb11 3308 goto put_sess;
c6a4bb2e
AC		 3309 }
3310
3311 fnode_conn = iscsi_dev_to_flash_conn(dev);
3312 err = transport->login_flashnode(fnode_sess, fnode_conn);
8526cb11
MC		 3313 put_device(dev);
3314
3315put_sess:
3316 put_device(&fnode_sess->dev);
c6a4bb2e
AC		 3317
3318put_host:
3319 scsi_host_put(shost);
3320
3321exit_login_fnode:
3322 return err;
3323}
3324
3325static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3326 struct iscsi_uevent *ev)
3327{
3328 struct Scsi_Host *shost;
3329 struct iscsi_bus_flash_session *fnode_sess;
3330 struct iscsi_bus_flash_conn *fnode_conn;
3331 struct device *dev;
8526cb11 3332 uint32_t idx;
c6a4bb2e
AC		 3333 int err = 0;
3334
3335 if (!transport->logout_flashnode) {
3336 err = -ENOSYS;
3337 goto exit_logout_fnode;
3338 }
3339
3340 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3341 if (!shost) {
3342 pr_err("%s could not find host no %u\n",
3343 __func__, ev->u.logout_flashnode.host_no);
3344 err = -ENODEV;
3345 goto put_host;
3346 }
3347
8526cb11
MC		 3348 idx = ev->u.logout_flashnode.flashnode_idx;
3349 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
c6a4bb2e
AC		 3350 if (!fnode_sess) {
3351 pr_err("%s could not find flashnode %u for host no %u\n",
8526cb11 3352 __func__, idx, ev->u.logout_flashnode.host_no);
c6a4bb2e
AC		 3353 err = -ENODEV;
3354 goto put_host;
3355 }
3356
8526cb11 3357 dev = iscsi_find_flashnode_conn(fnode_sess);
c6a4bb2e
AC		 3358 if (!dev) {
3359 err = -ENODEV;
8526cb11 3360 goto put_sess;
c6a4bb2e
AC		 3361 }
3362
3363 fnode_conn = iscsi_dev_to_flash_conn(dev);
3364
3365 err = transport->logout_flashnode(fnode_sess, fnode_conn);
8526cb11
MC		 3366 put_device(dev);
3367
3368put_sess:
3369 put_device(&fnode_sess->dev);
c6a4bb2e
AC		 3370
3371put_host:
3372 scsi_host_put(shost);
3373
3374exit_logout_fnode:
3375 return err;
3376}
3377
3378static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3379 struct iscsi_uevent *ev)
3380{
3381 struct Scsi_Host *shost;
3382 struct iscsi_cls_session *session;
3383 int err = 0;
3384
3385 if (!transport->logout_flashnode_sid) {
3386 err = -ENOSYS;
3387 goto exit_logout_sid;
3388 }
3389
3390 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3391 if (!shost) {
3392 pr_err("%s could not find host no %u\n",
3393 __func__, ev->u.logout_flashnode.host_no);
3394 err = -ENODEV;
3395 goto put_host;
3396 }
3397
3398 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3399 if (!session) {
3400 pr_err("%s could not find session id %u\n",
3401 __func__, ev->u.logout_flashnode_sid.sid);
3402 err = -EINVAL;
3403 goto put_host;
3404 }
3405
3406 err = transport->logout_flashnode_sid(session);
3407
3408put_host:
3409 scsi_host_put(shost);
3410
3411exit_logout_sid:
3412 return err;
3413}
3414
6fa7c554
LC		 3415static int
3416iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3417{
3418 struct iscsi_uevent *ev = nlmsg_data(nlh);
3419 struct Scsi_Host *shost = NULL;
3420 struct iscsi_internal *priv;
3421 struct sk_buff *skbhost_stats;
3422 struct nlmsghdr *nlhhost_stats;
3423 struct iscsi_uevent *evhost_stats;
3424 int host_stats_size = 0;
3425 int len, err = 0;
3426 char *buf;
3427
3428 if (!transport->get_host_stats)
719e5874 3429 return -ENOSYS;
6fa7c554
LC		 3430
3431 priv = iscsi_if_transport_lookup(transport);
3432 if (!priv)
3433 return -EINVAL;
3434
3435 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3436 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3437
3438 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3439 if (!shost) {
3440 pr_err("%s: failed. Cound not find host no %u\n",
3441 __func__, ev->u.get_host_stats.host_no);
3442 return -ENODEV;
3443 }
3444
3445 do {
3446 int actual_size;
3447
3448 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3449 if (!skbhost_stats) {
3450 pr_err("cannot deliver host stats: OOM\n");
3451 err = -ENOMEM;
3452 goto exit_host_stats;
3453 }
3454
3455 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3456 (len - sizeof(*nlhhost_stats)), 0);
3457 evhost_stats = nlmsg_data(nlhhost_stats);
3458 memset(evhost_stats, 0, sizeof(*evhost_stats));
3459 evhost_stats->transport_handle = iscsi_handle(transport);
3460 evhost_stats->type = nlh->nlmsg_type;
3461 evhost_stats->u.get_host_stats.host_no =
3462 ev->u.get_host_stats.host_no;
a799cb77 3463 buf = (char *)evhost_stats + sizeof(*evhost_stats);
6fa7c554
LC		 3464 memset(buf, 0, host_stats_size);
3465
3466 err = transport->get_host_stats(shost, buf, host_stats_size);
2f7608fc 3467 if (err) {
bfb50879 3468 kfree_skb(skbhost_stats);
2f7608fc
MC		 3469 goto exit_host_stats;
3470 }
6fa7c554
LC		 3471
3472 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3473 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3474 nlhhost_stats->nlmsg_len = actual_size;
3475
3476 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3477 GFP_KERNEL);
3478 } while (err < 0 && err != -ECONNREFUSED);
3479
3480exit_host_stats:
3481 scsi_host_put(shost);
3482 return err;
3483}
3484
3485
43514774
MC		 3486static int
3487iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
0896b752
AA		 3488{
3489 int err = 0;
e07ebea0 3490 struct iscsi_uevent *ev = nlmsg_data(nlh);
0896b752
AA		 3491 struct iscsi_transport *transport = NULL;
3492 struct iscsi_internal *priv;
7b7232f3
MC		 3493 struct iscsi_cls_session *session;
3494 struct iscsi_cls_conn *conn;
d82ff9be 3495 struct iscsi_endpoint *ep = NULL;
0896b752 3496
43514774
MC		 3497 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3498 *group = ISCSI_NL_GRP_UIP;
3499 else
3500 *group = ISCSI_NL_GRP_ISCSID;
3501
0896b752
AA		 3502 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3503 if (!priv)
3504 return -EINVAL;
3505 transport = priv->iscsi_transport;
3506
7b7232f3
MC		 3507 if (!try_module_get(transport->owner))
3508 return -EINVAL;
3509
0896b752
AA		 3510 switch (nlh->nlmsg_type) {
3511 case ISCSI_UEVENT_CREATE_SESSION:
d82ff9be 3512 err = iscsi_if_create_session(priv, ep, ev,
15e47304 3513 NETLINK_CB(skb).portid,
40753caa
MC		 3514 ev->u.c_session.initial_cmdsn,
3515 ev->u.c_session.cmds_max,
3516 ev->u.c_session.queue_depth);
3517 break;
3518 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
d82ff9be 3519 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
c95fddc7
MC		 3520 if (!ep) {
3521 err = -EINVAL;
3522 break;
3523 }
d82ff9be
MC		 3524
3525 err = iscsi_if_create_session(priv, ep, ev,
15e47304 3526 NETLINK_CB(skb).portid,
40753caa
MC		 3527 ev->u.c_bound_session.initial_cmdsn,
3528 ev->u.c_bound_session.cmds_max,
3529 ev->u.c_bound_session.queue_depth);
0896b752
AA		 3530 break;
3531 case ISCSI_UEVENT_DESTROY_SESSION:
b5c7a12d 3532 session = iscsi_session_lookup(ev->u.d_session.sid);
26974789 3533 if (session)
7b7232f3 3534 transport->destroy_session(session);
26974789
MC		 3535 else
3536 err = -EINVAL;
3537 break;
3538 case ISCSI_UEVENT_UNBIND_SESSION:
3539 session = iscsi_session_lookup(ev->u.d_session.sid);
3540 if (session)
06d25af4
MC		 3541 scsi_queue_work(iscsi_session_to_shost(session),
3542 &session->unbind_work);
26974789 3543 else
7b7232f3 3544 err = -EINVAL;
0896b752
AA		 3545 break;
3546 case ISCSI_UEVENT_CREATE_CONN:
3547 err = iscsi_if_create_conn(transport, ev);
3548 break;
3549 case ISCSI_UEVENT_DESTROY_CONN:
3550 err = iscsi_if_destroy_conn(transport, ev);
3551 break;
3552 case ISCSI_UEVENT_BIND_CONN:
b5c7a12d
MC		 3553 session = iscsi_session_lookup(ev->u.b_conn.sid);
3554 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
7b7232f3 3555
22a39fbb
MC		 3556 if (conn && conn->ep)
3557 iscsi_if_ep_disconnect(transport, conn->ep->id);
3558
3559 if (!session || !conn) {
7b7232f3 3560 err = -EINVAL;
22a39fbb
MC		 3561 break;
3562 }
3563
3564 ev->r.retcode = transport->bind_conn(session, conn,
3565 ev->u.b_conn.transport_eph,
3566 ev->u.b_conn.is_leading);
3567 if (ev->r.retcode || !transport->ep_connect)
3568 break;
3569
3570 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3571 if (ep) {
3572 ep->conn = conn;
3573
3574 mutex_lock(&conn->ep_mutex);
3575 conn->ep = ep;
3576 mutex_unlock(&conn->ep_mutex);
3577 } else
3578 iscsi_cls_conn_printk(KERN_ERR, conn,
3579 "Could not set ep conn "
3580 "binding\n");
0896b752
AA		 3581 break;
3582 case ISCSI_UEVENT_SET_PARAM:
fd7255f5 3583 err = iscsi_set_param(transport, ev);
0896b752
AA		 3584 break;
3585 case ISCSI_UEVENT_START_CONN:
b5c7a12d 3586 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
7b7232f3
MC		 3587 if (conn)
3588 ev->r.retcode = transport->start_conn(conn);
3589 else
3590 err = -EINVAL;
0896b752
AA		 3591 break;
3592 case ISCSI_UEVENT_STOP_CONN:
b5c7a12d 3593 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
7b7232f3
MC		 3594 if (conn)
3595 transport->stop_conn(conn, ev->u.stop_conn.flag);
3596 else
3597 err = -EINVAL;
0896b752
AA		 3598 break;
3599 case ISCSI_UEVENT_SEND_PDU:
b5c7a12d 3600 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
7b7232f3
MC		 3601 if (conn)
3602 ev->r.retcode = transport->send_pdu(conn,
3603 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3604 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3605 ev->u.send_pdu.data_size);
3606 else
3607 err = -EINVAL;
0896b752
AA		 3608 break;
3609 case ISCSI_UEVENT_GET_STATS:
5b940adf 3610 err = iscsi_if_get_stats(transport, nlh);
0896b752 3611 break;
264faaaa
OG		 3612 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3613 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3614 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
10eb0f01 3615 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
264faaaa
OG		 3616 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3617 break;
01cb225d
MC		 3618 case ISCSI_UEVENT_TGT_DSCVR:
3619 err = iscsi_tgt_dscvr(transport, ev);
3620 break;
1d9bf13a
MC		 3621 case ISCSI_UEVENT_SET_HOST_PARAM:
3622 err = iscsi_set_host_param(transport, ev);
3623 break;
43514774
MC		 3624 case ISCSI_UEVENT_PATH_UPDATE:
3625 err = iscsi_set_path(transport, ev);
3626 break;
56c155b5 3627 case ISCSI_UEVENT_SET_IFACE_PARAMS:
00c31889
MC		 3628 err = iscsi_set_iface_params(transport, ev,
3629 nlmsg_attrlen(nlh, sizeof(*ev)));
56c155b5 3630 break;
ac20c7bf
VC		 3631 case ISCSI_UEVENT_PING:
3632 err = iscsi_send_ping(transport, ev);
3633 break;
6260a5d2
NJ		 3634 case ISCSI_UEVENT_GET_CHAP:
3635 err = iscsi_get_chap(transport, nlh);
3636 break;
3637 case ISCSI_UEVENT_DELETE_CHAP:
3638 err = iscsi_delete_chap(transport, ev);
3639 break;
c6a4bb2e
AC		 3640 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3641 err = iscsi_set_flashnode_param(transport, ev,
3642 nlmsg_attrlen(nlh,
3643 sizeof(*ev)));
3644 break;
3645 case ISCSI_UEVENT_NEW_FLASHNODE:
3646 err = iscsi_new_flashnode(transport, ev,
3647 nlmsg_attrlen(nlh, sizeof(*ev)));
3648 break;
3649 case ISCSI_UEVENT_DEL_FLASHNODE:
3650 err = iscsi_del_flashnode(transport, ev);
3651 break;
3652 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3653 err = iscsi_login_flashnode(transport, ev);
3654 break;
3655 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3656 err = iscsi_logout_flashnode(transport, ev);
3657 break;
3658 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3659 err = iscsi_logout_flashnode_sid(transport, ev);
3660 break;
3af142fe
AC		 3661 case ISCSI_UEVENT_SET_CHAP:
3662 err = iscsi_set_chap(transport, ev,
3663 nlmsg_attrlen(nlh, sizeof(*ev)));
3664 break;
6fa7c554
LC		 3665 case ISCSI_UEVENT_GET_HOST_STATS:
3666 err = iscsi_get_host_stats(transport, nlh);
3667 break;
0896b752 3668 default:
1d9bf13a 3669 err = -ENOSYS;
0896b752
AA		 3670 break;
3671 }
3672
7b7232f3 3673 module_put(transport->owner);
0896b752
AA		 3674 return err;
3675}
3676
b5c7a12d 3677/*
cd40b7d3
DL		 3678 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3679 * Malformed skbs with wrong lengths or invalid creds are not processed.
b5c7a12d 3680 */
0896b752 3681static void
cd40b7d3 3682iscsi_if_rx(struct sk_buff *skb)
0896b752 3683{
0b950672 3684 mutex_lock(&rx_queue_mutex);
e07ebea0 3685 while (skb->len >= NLMSG_HDRLEN) {
cd40b7d3
DL		 3686 int err;
3687 uint32_t rlen;
3688 struct nlmsghdr *nlh;
3689 struct iscsi_uevent *ev;
43514774 3690 uint32_t group;
cd40b7d3
DL		 3691
3692 nlh = nlmsg_hdr(skb);
3693 if (nlh->nlmsg_len < sizeof(*nlh) ||
3694 skb->len < nlh->nlmsg_len) {
3695 break;
ee7f8e40 3696 }
ee7f8e40 3697
e07ebea0 3698 ev = nlmsg_data(nlh);
cd40b7d3
DL		 3699 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3700 if (rlen > skb->len)
3701 rlen = skb->len;
0896b752 3702
43514774 3703 err = iscsi_if_recv_msg(skb, nlh, &group);
cd40b7d3
DL		 3704 if (err) {
3705 ev->type = ISCSI_KEVENT_IF_ERROR;
3706 ev->iferror = err;
0896b752 3707 }
cd40b7d3
DL		 3708 do {
3709 /*
3710 * special case for GET_STATS:
3711 * on success - sending reply and stats from
3712 * inside of if_recv_msg(),
3713 * on error - fall through.
3714 */
3715 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3716 break;
6260a5d2
NJ		 3717 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3718 break;
43514774 3719 err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
cd40b7d3 3720 nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
46a7c17d 3721 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
cd40b7d3 3722 skb_pull(skb, rlen);
0896b752 3723 }
0b950672 3724 mutex_unlock(&rx_queue_mutex);
0896b752 3725}
1da177e4 3726
fd7255f5 3727#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
ee959b00 3728struct device_attribute dev_attr_##_prefix##_##_name = \
fd7255f5
MC		 3729 __ATTR(_name,_mode,_show,_store)
3730
1da177e4 3731/*
0896b752 3732 * iSCSI connection attrs
1da177e4 3733 */
a54a52ca 3734#define iscsi_conn_attr_show(param) \
0896b752 3735static ssize_t \
ee959b00
TJ		 3736show_conn_param_##param(struct device *dev, \
3737 struct device_attribute *attr, char *buf) \
0896b752 3738{ \
ee959b00 3739 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
7b8631b5 3740 struct iscsi_transport *t = conn->transport; \
a54a52ca 3741 return t->get_conn_param(conn, param, buf); \
0896b752
AA		 3742}
3743
a54a52ca
MC		 3744#define iscsi_conn_attr(field, param) \
3745 iscsi_conn_attr_show(param) \
3746static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
fd7255f5 3747 NULL);
0896b752 3748
a54a52ca
MC		 3749iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3750iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3751iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3752iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3753iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3754iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3755iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
a54a52ca
MC		 3756iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3757iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
f6d5180c
MC		 3758iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3759iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
ae542edb
AC		 3760iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3761iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3762iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3763iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3764iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3765iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3766iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3767iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3768iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3769iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3770iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3771iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3772iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3773iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3774iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3775iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
5af62f24 3776iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
ae542edb 3777
1da177e4 3778
289324b0
MC		 3779#define iscsi_conn_ep_attr_show(param) \
3780static ssize_t show_conn_ep_param_##param(struct device *dev, \
3781 struct device_attribute *attr,\
3782 char *buf) \
3783{ \
3784 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3785 struct iscsi_transport *t = conn->transport; \
3786 struct iscsi_endpoint *ep; \
3787 ssize_t rc; \
3788 \
3789 /* \
3790 * Need to make sure ep_disconnect does not free the LLD's \
3791 * interconnect resources while we are trying to read them. \
3792 */ \
3793 mutex_lock(&conn->ep_mutex); \
3794 ep = conn->ep; \
3795 if (!ep && t->ep_connect) { \
3796 mutex_unlock(&conn->ep_mutex); \
3797 return -ENOTCONN; \
3798 } \
3799 \
3800 if (ep) \
3801 rc = t->get_ep_param(ep, param, buf); \
3802 else \
3803 rc = t->get_conn_param(conn, param, buf); \
3804 mutex_unlock(&conn->ep_mutex); \
3805 return rc; \
3806}
3807
3808#define iscsi_conn_ep_attr(field, param) \
3809 iscsi_conn_ep_attr_show(param) \
3810static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3811 show_conn_ep_param_##param, NULL);
3812
3813iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3814iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3815
3128c6c7
MC		 3816static struct attribute *iscsi_conn_attrs[] = {
3817 &dev_attr_conn_max_recv_dlength.attr,
3818 &dev_attr_conn_max_xmit_dlength.attr,
3819 &dev_attr_conn_header_digest.attr,
3820 &dev_attr_conn_data_digest.attr,
3821 &dev_attr_conn_ifmarker.attr,
3822 &dev_attr_conn_ofmarker.attr,
3823 &dev_attr_conn_address.attr,
3824 &dev_attr_conn_port.attr,
3825 &dev_attr_conn_exp_statsn.attr,
3826 &dev_attr_conn_persistent_address.attr,
3827 &dev_attr_conn_persistent_port.attr,
3828 &dev_attr_conn_ping_tmo.attr,
3829 &dev_attr_conn_recv_tmo.attr,
ae542edb
AC		 3830 &dev_attr_conn_local_port.attr,
3831 &dev_attr_conn_statsn.attr,
3832 &dev_attr_conn_keepalive_tmo.attr,
3833 &dev_attr_conn_max_segment_size.attr,
3834 &dev_attr_conn_tcp_timestamp_stat.attr,
3835 &dev_attr_conn_tcp_wsf_disable.attr,
3836 &dev_attr_conn_tcp_nagle_disable.attr,
3837 &dev_attr_conn_tcp_timer_scale.attr,
3838 &dev_attr_conn_tcp_timestamp_enable.attr,
3839 &dev_attr_conn_fragment_disable.attr,
3840 &dev_attr_conn_ipv4_tos.attr,
3841 &dev_attr_conn_ipv6_traffic_class.attr,
3842 &dev_attr_conn_ipv6_flow_label.attr,
3843 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3844 &dev_attr_conn_tcp_xmit_wsf.attr,
3845 &dev_attr_conn_tcp_recv_wsf.attr,
5af62f24 3846 &dev_attr_conn_local_ipaddr.attr,
3128c6c7
MC		 3847 NULL,
3848};
3849
587a1f16 3850static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3128c6c7
MC		 3851 struct attribute *attr, int i)
3852{
3853 struct device *cdev = container_of(kobj, struct device, kobj);
3854 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3855 struct iscsi_transport *t = conn->transport;
3856 int param;
3857
3858 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3859 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3860 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3861 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3862 else if (attr == &dev_attr_conn_header_digest.attr)
3863 param = ISCSI_PARAM_HDRDGST_EN;
3864 else if (attr == &dev_attr_conn_data_digest.attr)
3865 param = ISCSI_PARAM_DATADGST_EN;
3866 else if (attr == &dev_attr_conn_ifmarker.attr)
3867 param = ISCSI_PARAM_IFMARKER_EN;
3868 else if (attr == &dev_attr_conn_ofmarker.attr)
3869 param = ISCSI_PARAM_OFMARKER_EN;
3870 else if (attr == &dev_attr_conn_address.attr)
3871 param = ISCSI_PARAM_CONN_ADDRESS;
3872 else if (attr == &dev_attr_conn_port.attr)
3873 param = ISCSI_PARAM_CONN_PORT;
3874 else if (attr == &dev_attr_conn_exp_statsn.attr)
3875 param = ISCSI_PARAM_EXP_STATSN;
3876 else if (attr == &dev_attr_conn_persistent_address.attr)
3877 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3878 else if (attr == &dev_attr_conn_persistent_port.attr)
3879 param = ISCSI_PARAM_PERSISTENT_PORT;
3880 else if (attr == &dev_attr_conn_ping_tmo.attr)
3881 param = ISCSI_PARAM_PING_TMO;
3882 else if (attr == &dev_attr_conn_recv_tmo.attr)
3883 param = ISCSI_PARAM_RECV_TMO;
ae542edb
AC		 3884 else if (attr == &dev_attr_conn_local_port.attr)
3885 param = ISCSI_PARAM_LOCAL_PORT;
3886 else if (attr == &dev_attr_conn_statsn.attr)
3887 param = ISCSI_PARAM_STATSN;
3888 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3889 param = ISCSI_PARAM_KEEPALIVE_TMO;
3890 else if (attr == &dev_attr_conn_max_segment_size.attr)
3891 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3892 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3893 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3894 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3895 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3896 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3897 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3898 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3899 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3900 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3901 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3902 else if (attr == &dev_attr_conn_fragment_disable.attr)
3903 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3904 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3905 param = ISCSI_PARAM_IPV4_TOS;
3906 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3907 param = ISCSI_PARAM_IPV6_TC;
3908 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3909 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3910 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3911 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3912 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3913 param = ISCSI_PARAM_TCP_XMIT_WSF;
3914 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3915 param = ISCSI_PARAM_TCP_RECV_WSF;
5af62f24
AC		 3916 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3917 param = ISCSI_PARAM_LOCAL_IPADDR;
3128c6c7
MC		 3918 else {
3919 WARN_ONCE(1, "Invalid conn attr");
3920 return 0;
3921 }
3922
3923 return t->attr_is_visible(ISCSI_PARAM, param);
3924}
3925
3926static struct attribute_group iscsi_conn_group = {
3927 .attrs = iscsi_conn_attrs,
3928 .is_visible = iscsi_conn_attr_is_visible,
3929};
3930
1da177e4 3931/*
0896b752 3932 * iSCSI session attrs
1da177e4 3933 */
b2c64167 3934#define iscsi_session_attr_show(param, perm) \
fd7255f5 3935static ssize_t \
ee959b00
TJ		 3936show_session_param_##param(struct device *dev, \
3937 struct device_attribute *attr, char *buf) \
fd7255f5 3938{ \
ee959b00
TJ		 3939 struct iscsi_cls_session *session = \
3940 iscsi_dev_to_session(dev->parent); \
fd7255f5 3941 struct iscsi_transport *t = session->transport; \
b2c64167
MC		 3942 \
3943 if (perm && !capable(CAP_SYS_ADMIN)) \
3944 return -EACCES; \
a54a52ca 3945 return t->get_session_param(session, param, buf); \
fd7255f5
MC		 3946}
3947
b2c64167
MC		 3948#define iscsi_session_attr(field, param, perm) \
3949 iscsi_session_attr_show(param, perm) \
a54a52ca 3950static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
fd7255f5 3951 NULL);
b2c64167
MC		 3952iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3953iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3954iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3955iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3956iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3957iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3958iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3959iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3960iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3961iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3962iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3963iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3964iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3965iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
30534952
MC		 3966iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3967iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4cd49ea1
MC		 3968iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3969iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3970iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3fe5ae8b 3971iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
88dfd340 3972iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3b2bef1f
VC		 3973iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3974iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3b9373e9
EW		 3975iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3976iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3977iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
ae542edb
AC		 3978iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3979iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3980iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3981iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3982iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3983iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3984iscsi_session_attr(discovery_auth_optional,
3985 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3986iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3987iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3988iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3989iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3990iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3991iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3992iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
1da177e4 3993
6eabafbe 3994static ssize_t
ee959b00
TJ		 3995show_priv_session_state(struct device *dev, struct device_attribute *attr,
3996 char *buf)
6eabafbe 3997{
ee959b00 3998 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
6eabafbe
MC		 3999 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4000}
4001static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4002 NULL);
0c70d84b
MC		 4003static ssize_t
4004show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4005 char *buf)
4006{
4007 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4008 return sprintf(buf, "%d\n", session->creator);
4009}
4010static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4011 NULL);
930a9f04
MR		 4012static ssize_t
4013show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4014 char *buf)
4015{
4016 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4017 return sprintf(buf, "%d\n", session->target_id);
4018}
4019static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4020 show_priv_session_target_id, NULL);
6eabafbe 4021
fd7255f5
MC		 4022#define iscsi_priv_session_attr_show(field, format) \
4023static ssize_t \
ee959b00
TJ		 4024show_priv_session_##field(struct device *dev, \
4025 struct device_attribute *attr, char *buf) \
fd7255f5 4026{ \
ee959b00
TJ		 4027 struct iscsi_cls_session *session = \
4028 iscsi_dev_to_session(dev->parent); \
fe4f0bde
VC		 4029 if (session->field == -1) \
4030 return sprintf(buf, "off\n"); \
fd7255f5
MC		 4031 return sprintf(buf, format"\n", session->field); \
4032}
4033
fe4f0bde
VC		 4034#define iscsi_priv_session_attr_store(field) \
4035static ssize_t \
4036store_priv_session_##field(struct device *dev, \
4037 struct device_attribute *attr, \
4038 const char *buf, size_t count) \
4039{ \
4040 int val; \
4041 char *cp; \
4042 struct iscsi_cls_session *session = \
4043 iscsi_dev_to_session(dev->parent); \
4044 if ((session->state == ISCSI_SESSION_FREE) || \
4045 (session->state == ISCSI_SESSION_FAILED)) \
4046 return -EBUSY; \
9c8108a4 4047 if (strncmp(buf, "off", 3) == 0) { \
fe4f0bde 4048 session->field = -1; \
9c8108a4
CL		 4049 session->field##_sysfs_override = true; \
4050 } else { \
fe4f0bde
VC		 4051 val = simple_strtoul(buf, &cp, 0); \
4052 if (*cp != '\0' && *cp != '\n') \
4053 return -EINVAL; \
4054 session->field = val; \
9c8108a4 4055 session->field##_sysfs_override = true; \
fe4f0bde
VC		 4056 } \
4057 return count; \
4058}
4059
4060#define iscsi_priv_session_rw_attr(field, format) \
fd7255f5 4061 iscsi_priv_session_attr_show(field, format) \
fe4f0bde 4062 iscsi_priv_session_attr_store(field) \
523f3c80 4063static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
fe4f0bde
VC		 4064 show_priv_session_##field, \
4065 store_priv_session_##field)
9c8108a4 4066
fe4f0bde 4067iscsi_priv_session_rw_attr(recovery_tmo, "%d");
fd7255f5 4068
1d063c17
MC		 4069static struct attribute *iscsi_session_attrs[] = {
4070 &dev_attr_sess_initial_r2t.attr,
4071 &dev_attr_sess_max_outstanding_r2t.attr,
4072 &dev_attr_sess_immediate_data.attr,
4073 &dev_attr_sess_first_burst_len.attr,
4074 &dev_attr_sess_max_burst_len.attr,
4075 &dev_attr_sess_data_pdu_in_order.attr,
4076 &dev_attr_sess_data_seq_in_order.attr,
4077 &dev_attr_sess_erl.attr,
4078 &dev_attr_sess_targetname.attr,
4079 &dev_attr_sess_tpgt.attr,
4080 &dev_attr_sess_password.attr,
4081 &dev_attr_sess_password_in.attr,
4082 &dev_attr_sess_username.attr,
4083 &dev_attr_sess_username_in.attr,
4084 &dev_attr_sess_fast_abort.attr,
4085 &dev_attr_sess_abort_tmo.attr,
4086 &dev_attr_sess_lu_reset_tmo.attr,
4087 &dev_attr_sess_tgt_reset_tmo.attr,
4088 &dev_attr_sess_ifacename.attr,
4089 &dev_attr_sess_initiatorname.attr,
4090 &dev_attr_sess_targetalias.attr,
3b9373e9
EW		 4091 &dev_attr_sess_boot_root.attr,
4092 &dev_attr_sess_boot_nic.attr,
4093 &dev_attr_sess_boot_target.attr,
1d063c17
MC		 4094 &dev_attr_priv_sess_recovery_tmo.attr,
4095 &dev_attr_priv_sess_state.attr,
0c70d84b 4096 &dev_attr_priv_sess_creator.attr,
30534952
MC		 4097 &dev_attr_sess_chap_out_idx.attr,
4098 &dev_attr_sess_chap_in_idx.attr,
930a9f04 4099 &dev_attr_priv_sess_target_id.attr,
ae542edb
AC		 4100 &dev_attr_sess_auto_snd_tgt_disable.attr,
4101 &dev_attr_sess_discovery_session.attr,
4102 &dev_attr_sess_portal_type.attr,
4103 &dev_attr_sess_chap_auth.attr,
4104 &dev_attr_sess_discovery_logout.attr,
4105 &dev_attr_sess_bidi_chap.attr,
4106 &dev_attr_sess_discovery_auth_optional.attr,
4107 &dev_attr_sess_def_time2wait.attr,
4108 &dev_attr_sess_def_time2retain.attr,
4109 &dev_attr_sess_isid.attr,
4110 &dev_attr_sess_tsid.attr,
4111 &dev_attr_sess_def_taskmgmt_tmo.attr,
4112 &dev_attr_sess_discovery_parent_idx.attr,
4113 &dev_attr_sess_discovery_parent_type.attr,
1d063c17
MC		 4114 NULL,
4115};
4116
587a1f16 4117static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
1d063c17
MC		 4118 struct attribute *attr, int i)
4119{
4120 struct device *cdev = container_of(kobj, struct device, kobj);
4121 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4122 struct iscsi_transport *t = session->transport;
4123 int param;
4124
4125 if (attr == &dev_attr_sess_initial_r2t.attr)
4126 param = ISCSI_PARAM_INITIAL_R2T_EN;
4127 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4128 param = ISCSI_PARAM_MAX_R2T;
4129 else if (attr == &dev_attr_sess_immediate_data.attr)
4130 param = ISCSI_PARAM_IMM_DATA_EN;
4131 else if (attr == &dev_attr_sess_first_burst_len.attr)
4132 param = ISCSI_PARAM_FIRST_BURST;
4133 else if (attr == &dev_attr_sess_max_burst_len.attr)
4134 param = ISCSI_PARAM_MAX_BURST;
4135 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4136 param = ISCSI_PARAM_PDU_INORDER_EN;
4137 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4138 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4139 else if (attr == &dev_attr_sess_erl.attr)
4140 param = ISCSI_PARAM_ERL;
4141 else if (attr == &dev_attr_sess_targetname.attr)
4142 param = ISCSI_PARAM_TARGET_NAME;
4143 else if (attr == &dev_attr_sess_tpgt.attr)
4144 param = ISCSI_PARAM_TPGT;
30534952
MC		 4145 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4146 param = ISCSI_PARAM_CHAP_IN_IDX;
4147 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4148 param = ISCSI_PARAM_CHAP_OUT_IDX;
1d063c17
MC		 4149 else if (attr == &dev_attr_sess_password.attr)
4150 param = ISCSI_PARAM_USERNAME;
4151 else if (attr == &dev_attr_sess_password_in.attr)
4152 param = ISCSI_PARAM_USERNAME_IN;
4153 else if (attr == &dev_attr_sess_username.attr)
4154 param = ISCSI_PARAM_PASSWORD;
4155 else if (attr == &dev_attr_sess_username_in.attr)
4156 param = ISCSI_PARAM_PASSWORD_IN;
4157 else if (attr == &dev_attr_sess_fast_abort.attr)
4158 param = ISCSI_PARAM_FAST_ABORT;
4159 else if (attr == &dev_attr_sess_abort_tmo.attr)
4160 param = ISCSI_PARAM_ABORT_TMO;
4161 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4162 param = ISCSI_PARAM_LU_RESET_TMO;
4163 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4164 param = ISCSI_PARAM_TGT_RESET_TMO;
4165 else if (attr == &dev_attr_sess_ifacename.attr)
4166 param = ISCSI_PARAM_IFACE_NAME;
4167 else if (attr == &dev_attr_sess_initiatorname.attr)
4168 param = ISCSI_PARAM_INITIATOR_NAME;
4169 else if (attr == &dev_attr_sess_targetalias.attr)
4170 param = ISCSI_PARAM_TARGET_ALIAS;
3b9373e9
EW		 4171 else if (attr == &dev_attr_sess_boot_root.attr)
4172 param = ISCSI_PARAM_BOOT_ROOT;
4173 else if (attr == &dev_attr_sess_boot_nic.attr)
4174 param = ISCSI_PARAM_BOOT_NIC;
4175 else if (attr == &dev_attr_sess_boot_target.attr)
4176 param = ISCSI_PARAM_BOOT_TARGET;
ae542edb
AC		 4177 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4178 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4179 else if (attr == &dev_attr_sess_discovery_session.attr)
4180 param = ISCSI_PARAM_DISCOVERY_SESS;
4181 else if (attr == &dev_attr_sess_portal_type.attr)
4182 param = ISCSI_PARAM_PORTAL_TYPE;
4183 else if (attr == &dev_attr_sess_chap_auth.attr)
4184 param = ISCSI_PARAM_CHAP_AUTH_EN;
4185 else if (attr == &dev_attr_sess_discovery_logout.attr)
4186 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4187 else if (attr == &dev_attr_sess_bidi_chap.attr)
4188 param = ISCSI_PARAM_BIDI_CHAP_EN;
4189 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4190 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4191 else if (attr == &dev_attr_sess_def_time2wait.attr)
4192 param = ISCSI_PARAM_DEF_TIME2WAIT;
4193 else if (attr == &dev_attr_sess_def_time2retain.attr)
4194 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4195 else if (attr == &dev_attr_sess_isid.attr)
4196 param = ISCSI_PARAM_ISID;
4197 else if (attr == &dev_attr_sess_tsid.attr)
4198 param = ISCSI_PARAM_TSID;
4199 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4200 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4201 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4202 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4203 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4204 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
1d063c17
MC		 4205 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4206 return S_IRUGO | S_IWUSR;
4207 else if (attr == &dev_attr_priv_sess_state.attr)
4208 return S_IRUGO;
0c70d84b
MC		 4209 else if (attr == &dev_attr_priv_sess_creator.attr)
4210 return S_IRUGO;
930a9f04
MR		 4211 else if (attr == &dev_attr_priv_sess_target_id.attr)
4212 return S_IRUGO;
1d063c17
MC		 4213 else {
4214 WARN_ONCE(1, "Invalid session attr");
4215 return 0;
4216 }
4217
4218 return t->attr_is_visible(ISCSI_PARAM, param);
4219}
4220
4221static struct attribute_group iscsi_session_group = {
4222 .attrs = iscsi_session_attrs,
4223 .is_visible = iscsi_session_attr_is_visible,
4224};
4225
1819dc81
MC		 4226/*
4227 * iSCSI host attrs
4228 */
4229#define iscsi_host_attr_show(param) \
4230static ssize_t \
ee959b00
TJ		 4231show_host_param_##param(struct device *dev, \
4232 struct device_attribute *attr, char *buf) \
1819dc81 4233{ \
ee959b00 4234 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1819dc81
MC		 4235 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4236 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4237}
4238
4239#define iscsi_host_attr(field, param) \
4240 iscsi_host_attr_show(param) \
4241static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4242 NULL);
4243
d8196ed2 4244iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
1819dc81 4245iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
d8196ed2 4246iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
8ad5781a 4247iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
aeddde29
VC		 4248iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4249iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
1819dc81 4250
f27fb2ef
MC		 4251static struct attribute *iscsi_host_attrs[] = {
4252 &dev_attr_host_netdev.attr,
4253 &dev_attr_host_hwaddress.attr,
4254 &dev_attr_host_ipaddress.attr,
4255 &dev_attr_host_initiatorname.attr,
aeddde29
VC		 4256 &dev_attr_host_port_state.attr,
4257 &dev_attr_host_port_speed.attr,
f27fb2ef
MC		 4258 NULL,
4259};
4260
587a1f16 4261static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
f27fb2ef
MC		 4262 struct attribute *attr, int i)
4263{
4264 struct device *cdev = container_of(kobj, struct device, kobj);
4265 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4266 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4267 int param;
4268
4269 if (attr == &dev_attr_host_netdev.attr)
4270 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4271 else if (attr == &dev_attr_host_hwaddress.attr)
4272 param = ISCSI_HOST_PARAM_HWADDRESS;
4273 else if (attr == &dev_attr_host_ipaddress.attr)
4274 param = ISCSI_HOST_PARAM_IPADDRESS;
4275 else if (attr == &dev_attr_host_initiatorname.attr)
4276 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
aeddde29
VC		 4277 else if (attr == &dev_attr_host_port_state.attr)
4278 param = ISCSI_HOST_PARAM_PORT_STATE;
4279 else if (attr == &dev_attr_host_port_speed.attr)
4280 param = ISCSI_HOST_PARAM_PORT_SPEED;
f27fb2ef
MC		 4281 else {
4282 WARN_ONCE(1, "Invalid host attr");
4283 return 0;
4284 }
4285
4286 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4287}
4288
4289static struct attribute_group iscsi_host_group = {
4290 .attrs = iscsi_host_attrs,
4291 .is_visible = iscsi_host_attr_is_visible,
4292};
1819dc81 4293
aeddde29
VC		 4294/* convert iscsi_port_speed values to ascii string name */
4295static const struct {
4296 enum iscsi_port_speed value;
4297 char *name;
4298} iscsi_port_speed_names[] = {
4299 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4300 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4301 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4302 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4303 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
f9e4fa46
JB		 4304 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },
4305 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },
aeddde29
VC		 4306};
4307
4308char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4309{
4310 int i;
4311 char *speed = "Unknown!";
4312 struct iscsi_cls_host *ihost = shost->shost_data;
4313 uint32_t port_speed = ihost->port_speed;
4314
4315 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4316 if (iscsi_port_speed_names[i].value & port_speed) {
4317 speed = iscsi_port_speed_names[i].name;
4318 break;
4319 }
4320 }
4321 return speed;
4322}
4323EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4324
4325/* convert iscsi_port_state values to ascii string name */
4326static const struct {
4327 enum iscsi_port_state value;
4328 char *name;
4329} iscsi_port_state_names[] = {
4330 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4331 {ISCSI_PORT_STATE_UP, "LINK UP" },
4332};
4333
4334char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4335{
4336 int i;
4337 char *state = "Unknown!";
4338 struct iscsi_cls_host *ihost = shost->shost_data;
4339 uint32_t port_state = ihost->port_state;
4340
4341 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4342 if (iscsi_port_state_names[i].value & port_state) {
4343 state = iscsi_port_state_names[i].name;
4344 break;
4345 }
4346 }
4347 return state;
4348}
4349EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4350
0896b752
AA		 4351static int iscsi_session_match(struct attribute_container *cont,
4352 struct device *dev)
1da177e4 4353{
7b8631b5 4354 struct iscsi_cls_session *session;
1da177e4 4355 struct Scsi_Host *shost;
0896b752
AA		 4356 struct iscsi_internal *priv;
4357
4358 if (!iscsi_is_session_dev(dev))
4359 return 0;
1da177e4 4360
7b8631b5
MC		 4361 session = iscsi_dev_to_session(dev);
4362 shost = iscsi_session_to_shost(session);
0896b752 4363 if (!shost->transportt)
1da177e4
LT		 4364 return 0;
4365
0896b752
AA		 4366 priv = to_iscsi_internal(shost->transportt);
4367 if (priv->session_cont.ac.class != &iscsi_session_class.class)
1da177e4
LT		 4368 return 0;
4369
0896b752 4370 return &priv->session_cont.ac == cont;
1da177e4
LT		 4371}
4372
0896b752
AA		 4373static int iscsi_conn_match(struct attribute_container *cont,
4374 struct device *dev)
4375{
7b8631b5
MC		 4376 struct iscsi_cls_session *session;
4377 struct iscsi_cls_conn *conn;
1da177e4 4378 struct Scsi_Host *shost;
0896b752 4379 struct iscsi_internal *priv;
1da177e4 4380
0896b752 4381 if (!iscsi_is_conn_dev(dev))
1da177e4
LT		 4382 return 0;
4383
7b8631b5
MC		 4384 conn = iscsi_dev_to_conn(dev);
4385 session = iscsi_dev_to_session(conn->dev.parent);
4386 shost = iscsi_session_to_shost(session);
4387
0896b752 4388 if (!shost->transportt)
1da177e4
LT		 4389 return 0;
4390
0896b752
AA		 4391 priv = to_iscsi_internal(shost->transportt);
4392 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4393 return 0;
1da177e4 4394
0896b752
AA		 4395 return &priv->conn_cont.ac == cont;
4396}
4397
30a6c652
MC		 4398static int iscsi_host_match(struct attribute_container *cont,
4399 struct device *dev)
4400{
4401 struct Scsi_Host *shost;
4402 struct iscsi_internal *priv;
4403
4404 if (!scsi_is_host_device(dev))
4405 return 0;
4406
4407 shost = dev_to_shost(dev);
4408 if (!shost->transportt ||
4409 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4410 return 0;
4411
4412 priv = to_iscsi_internal(shost->transportt);
4413 return &priv->t.host_attrs.ac == cont;
4414}
4415
7b8631b5
MC		 4416struct scsi_transport_template *
4417iscsi_register_transport(struct iscsi_transport *tt)
0896b752
AA		 4418{
4419 struct iscsi_internal *priv;
4420 unsigned long flags;
f27fb2ef 4421 int err;
0896b752
AA		 4422
4423 BUG_ON(!tt);
4424
4425 priv = iscsi_if_transport_lookup(tt);
4426 if (priv)
7b8631b5 4427 return NULL;
0896b752 4428
24669f75 4429 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
0896b752 4430 if (!priv)
7b8631b5 4431 return NULL;
0896b752 4432 INIT_LIST_HEAD(&priv->list);
0896b752 4433 priv->iscsi_transport = tt;
30a6c652 4434 priv->t.user_scan = iscsi_user_scan;
06d25af4 4435 priv->t.create_work_queue = 1;
0896b752 4436
ee959b00 4437 priv->dev.class = &iscsi_transport_class;
71610f55 4438 dev_set_name(&priv->dev, "%s", tt->name);
ee959b00 4439 err = device_register(&priv->dev);
0896b752
AA		 4440 if (err)
4441 goto free_priv;
4442
ee959b00 4443 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
0896b752 4444 if (err)
ee959b00 4445 goto unregister_dev;
0896b752 4446
30a6c652 4447 /* host parameters */
30a6c652
MC		 4448 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4449 priv->t.host_attrs.ac.match = iscsi_host_match;
f27fb2ef 4450 priv->t.host_attrs.ac.grp = &iscsi_host_group;
32c6e1b9 4451 priv->t.host_size = sizeof(struct iscsi_cls_host);
30a6c652
MC		 4452 transport_container_register(&priv->t.host_attrs);
4453
0896b752 4454 /* connection parameters */
0896b752
AA		 4455 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4456 priv->conn_cont.ac.match = iscsi_conn_match;
3128c6c7 4457 priv->conn_cont.ac.grp = &iscsi_conn_group;
0896b752 4458 transport_container_register(&priv->conn_cont);
1da177e4 4459
0896b752 4460 /* session parameters */
0896b752
AA		 4461 priv->session_cont.ac.class = &iscsi_session_class.class;
4462 priv->session_cont.ac.match = iscsi_session_match;
1d063c17 4463 priv->session_cont.ac.grp = &iscsi_session_group;
0896b752
AA		 4464 transport_container_register(&priv->session_cont);
4465
0896b752
AA		 4466 spin_lock_irqsave(&iscsi_transport_lock, flags);
4467 list_add(&priv->list, &iscsi_transports);
4468 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4469
4470 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
7b8631b5 4471 return &priv->t;
1da177e4 4472
ee959b00
TJ		 4473unregister_dev:
4474 device_unregister(&priv->dev);
d82ff9be 4475 return NULL;
0896b752
AA		 4476free_priv:
4477 kfree(priv);
7b8631b5 4478 return NULL;
1da177e4 4479}
0896b752
AA		 4480EXPORT_SYMBOL_GPL(iscsi_register_transport);
4481
4482int iscsi_unregister_transport(struct iscsi_transport *tt)
4483{
4484 struct iscsi_internal *priv;
4485 unsigned long flags;
4486
4487 BUG_ON(!tt);
4488
0b950672 4489 mutex_lock(&rx_queue_mutex);
0896b752
AA		 4490
4491 priv = iscsi_if_transport_lookup(tt);
4492 BUG_ON (!priv);
4493
0896b752
AA		 4494 spin_lock_irqsave(&iscsi_transport_lock, flags);
4495 list_del(&priv->list);
4496 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4497
4498 transport_container_unregister(&priv->conn_cont);
4499 transport_container_unregister(&priv->session_cont);
30a6c652 4500 transport_container_unregister(&priv->t.host_attrs);
0896b752 4501
ee959b00
TJ		 4502 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4503 device_unregister(&priv->dev);
0b950672 4504 mutex_unlock(&rx_queue_mutex);
1da177e4 4505
0896b752
AA		 4506 return 0;
4507}
4508EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
1da177e4 4509
1da177e4
LT		 4510static __init int iscsi_transport_init(void)
4511{
0896b752 4512 int err;
a31f2d17
PNA		 4513 struct netlink_kernel_cfg cfg = {
4514 .groups = 1,
4515 .input = iscsi_if_rx,
4516 };
09492605 4517 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
f4246b33
MC		 4518 ISCSI_TRANSPORT_VERSION);
4519
41be1444
MC		 4520 atomic_set(&iscsi_session_nr, 0);
4521
0896b752 4522 err = class_register(&iscsi_transport_class);
1da177e4
LT		 4523 if (err)
4524 return err;
0896b752 4525
d82ff9be 4526 err = class_register(&iscsi_endpoint_class);
0896b752
AA		 4527 if (err)
4528 goto unregister_transport_class;
4529
8d07913d 4530 err = class_register(&iscsi_iface_class);
d82ff9be
MC		 4531 if (err)
4532 goto unregister_endpoint_class;
4533
8d07913d
MC		 4534 err = transport_class_register(&iscsi_host_class);
4535 if (err)
4536 goto unregister_iface_class;
4537
30a6c652
MC		 4538 err = transport_class_register(&iscsi_connection_class);
4539 if (err)
4540 goto unregister_host_class;
4541
0896b752
AA		 4542 err = transport_class_register(&iscsi_session_class);
4543 if (err)
4544 goto unregister_conn_class;
4545
c6a4bb2e
AC		 4546 err = bus_register(&iscsi_flashnode_bus);
4547 if (err)
4548 goto unregister_session_class;
4549
9f00d977 4550 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
0896b752
AA		 4551 if (!nls) {
4552 err = -ENOBUFS;
c6a4bb2e 4553 goto unregister_flashnode_bus;
0896b752
AA		 4554 }
4555
d8bf541e 4556 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
bcab2ccd
WY		 4557 if (!iscsi_eh_timer_workq) {
4558 err = -ENOMEM;
d8bf541e 4559 goto release_nls;
bcab2ccd 4560 }
d8bf541e 4561
43a145a3 4562 return 0;
0896b752 4563
d8bf541e 4564release_nls:
b7c6ba6e 4565 netlink_kernel_release(nls);
c6a4bb2e
AC		 4566unregister_flashnode_bus:
4567 bus_unregister(&iscsi_flashnode_bus);
0896b752
AA		 4568unregister_session_class:
4569 transport_class_unregister(&iscsi_session_class);
4570unregister_conn_class:
4571 transport_class_unregister(&iscsi_connection_class);
30a6c652
MC		 4572unregister_host_class:
4573 transport_class_unregister(&iscsi_host_class);
8d07913d
MC		 4574unregister_iface_class:
4575 class_unregister(&iscsi_iface_class);
d82ff9be
MC		 4576unregister_endpoint_class:
4577 class_unregister(&iscsi_endpoint_class);
0896b752
AA		 4578unregister_transport_class:
4579 class_unregister(&iscsi_transport_class);
4580 return err;
1da177e4
LT		 4581}
4582
4583static void __exit iscsi_transport_exit(void)
4584{
d8bf541e 4585 destroy_workqueue(iscsi_eh_timer_workq);
b7c6ba6e 4586 netlink_kernel_release(nls);
c6a4bb2e 4587 bus_unregister(&iscsi_flashnode_bus);
0896b752
AA		 4588 transport_class_unregister(&iscsi_connection_class);
4589 transport_class_unregister(&iscsi_session_class);
30a6c652 4590 transport_class_unregister(&iscsi_host_class);
d82ff9be 4591 class_unregister(&iscsi_endpoint_class);
8d07913d 4592 class_unregister(&iscsi_iface_class);
0896b752 4593 class_unregister(&iscsi_transport_class);
1da177e4
LT		 4594}
4595
4596module_init(iscsi_transport_init);
4597module_exit(iscsi_transport_exit);
4598
0896b752
AA		 4599MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4600 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4601 "Alex Aizman <itn780@yahoo.com>");
4602MODULE_DESCRIPTION("iSCSI Transport Interface");
1da177e4 4603MODULE_LICENSE("GPL");
f4246b33 4604MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
058548ae 4605MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
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