projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge remote-tracking branches 'regulator/fix/88pm800', 'regulator/fix/max8973',...
[deliverable/linux.git] / drivers / scsi / scsi_transport_iscsi.c
CommitLineData
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
1012struct device_type iscsi_flashnode_sess_dev_type = {
1013 .name = "iscsi_flashnode_sess_dev_type",
1014 .groups = iscsi_flashnode_sess_attr_groups,
1015 .release = iscsi_flashnode_sess_release,
1016};
1017
1018/* flash node connection attrs show */
1019#define iscsi_flashnode_conn_attr_show(type, name, param) \
1020static ssize_t \
1021show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1022 char *buf) \
1023{ \
1024 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1025 struct iscsi_bus_flash_session *fnode_sess = \
1026 iscsi_flash_conn_to_flash_session(fnode_conn);\
1027 struct iscsi_transport *t = fnode_conn->transport; \
1028 return t->get_flashnode_param(fnode_sess, param, buf); \
1029} \
1030
1031
1032#define iscsi_flashnode_conn_attr(type, name, param) \
1033 iscsi_flashnode_conn_attr_show(type, name, param) \
1034static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1035 show_##type##_##name, NULL);
1036
1037/* Flash node connection attributes */
1038
1039iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1040 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1041iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1042iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1043iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1044iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1045 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1046iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1047 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1048iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1049 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1050iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1051 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1052iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1053 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1054iscsi_flashnode_conn_attr(fnode, fragment_disable,
1055 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1056iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1057iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1058iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1059iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1060 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1061iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1062 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1063iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1064iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1065iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1066iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1067 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1068iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1069 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1070iscsi_flashnode_conn_attr(fnode, max_segment_size,
1071 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1072iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1073 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1074iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1075iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1076iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1077iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1078
1079static struct attribute *iscsi_flashnode_conn_attrs[] = {
1080 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1081 &dev_attr_fnode_header_digest.attr,
1082 &dev_attr_fnode_data_digest.attr,
1083 &dev_attr_fnode_snack_req.attr,
1084 &dev_attr_fnode_tcp_timestamp_stat.attr,
1085 &dev_attr_fnode_tcp_nagle_disable.attr,
1086 &dev_attr_fnode_tcp_wsf_disable.attr,
1087 &dev_attr_fnode_tcp_timer_scale.attr,
1088 &dev_attr_fnode_tcp_timestamp_enable.attr,
1089 &dev_attr_fnode_fragment_disable.attr,
1090 &dev_attr_fnode_max_recv_dlength.attr,
1091 &dev_attr_fnode_max_xmit_dlength.attr,
1092 &dev_attr_fnode_keepalive_tmo.attr,
1093 &dev_attr_fnode_port.attr,
1094 &dev_attr_fnode_ipaddress.attr,
1095 &dev_attr_fnode_redirect_ipaddr.attr,
1096 &dev_attr_fnode_max_segment_size.attr,
1097 &dev_attr_fnode_local_port.attr,
1098 &dev_attr_fnode_ipv4_tos.attr,
1099 &dev_attr_fnode_ipv6_traffic_class.attr,
1100 &dev_attr_fnode_ipv6_flow_label.attr,
1101 &dev_attr_fnode_link_local_ipv6.attr,
1102 &dev_attr_fnode_tcp_xmit_wsf.attr,
1103 &dev_attr_fnode_tcp_recv_wsf.attr,
1104 &dev_attr_fnode_statsn.attr,
1105 &dev_attr_fnode_exp_statsn.attr,
1106 NULL,
1107};
1108
1109static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1110 struct attribute *attr,
1111 int i)
1112{
1113 struct device *dev = container_of(kobj, struct device, kobj);
1114 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1115 struct iscsi_transport *t = fnode_conn->transport;
1116 int param;
1117
1118 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1119 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1120 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1121 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1122 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1123 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1124 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1125 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1126 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1127 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1128 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1129 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1130 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1131 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1132 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1133 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1134 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1135 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1136 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1137 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1138 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1139 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1140 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1141 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1142 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1143 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1144 } else if (attr == &dev_attr_fnode_port.attr) {
1145 param = ISCSI_FLASHNODE_PORT;
1146 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1147 param = ISCSI_FLASHNODE_IPADDR;
1148 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1149 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1150 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1151 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1152 } else if (attr == &dev_attr_fnode_local_port.attr) {
1153 param = ISCSI_FLASHNODE_LOCAL_PORT;
1154 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1155 param = ISCSI_FLASHNODE_IPV4_TOS;
1156 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1157 param = ISCSI_FLASHNODE_IPV6_TC;
1158 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1159 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1160 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1161 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1162 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1163 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1164 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1165 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1166 } else if (attr == &dev_attr_fnode_statsn.attr) {
1167 param = ISCSI_FLASHNODE_STATSN;
1168 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1169 param = ISCSI_FLASHNODE_EXP_STATSN;
1170 } else {
1171 WARN_ONCE(1, "Invalid flashnode connection attr");
1172 return 0;
1173 }
1174
1175 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1176}
1177
1178static struct attribute_group iscsi_flashnode_conn_attr_group = {
1179 .attrs = iscsi_flashnode_conn_attrs,
1180 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1181};
1182
1183static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1184 &iscsi_flashnode_conn_attr_group,
1185 NULL,
1186};
1187
1188static void iscsi_flashnode_conn_release(struct device *dev)
1189{
1190 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1191
1192 kfree(fnode_conn->ipaddress);
1193 kfree(fnode_conn->redirect_ipaddr);
1194 kfree(fnode_conn->link_local_ipv6_addr);
1195 kfree(fnode_conn);
1196}
1197
1198struct device_type iscsi_flashnode_conn_dev_type = {
1199 .name = "iscsi_flashnode_conn_dev_type",
1200 .groups = iscsi_flashnode_conn_attr_groups,
1201 .release = iscsi_flashnode_conn_release,
1202};
1203
1204struct bus_type iscsi_flashnode_bus;
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
1215struct bus_type iscsi_flashnode_bus = {
1216 .name = "iscsi_flashnode",
1217 .match = &iscsi_flashnode_bus_match,
1218};
1219
1220/**
1221 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1222 * @shost: pointer to host data
1223 * @index: index of flashnode to add in sysfs
1224 * @transport: pointer to transport data
1225 * @dd_size: total size to allocate
1226 *
1227 * Adds a sysfs entry for the flashnode session attributes
1228 *
1229 * Returns:
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 */
1327int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1328{
1329 return dev->bus == &iscsi_flashnode_bus;
1330}
1331EXPORT_SYMBOL_GPL(iscsi_is_flashnode_conn_dev);
1332
1333static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1334{
1335 device_unregister(&fnode_conn->dev);
1336 return 0;
1337}
1338
1339static int flashnode_match_index(struct device *dev, void *data)
1340{
1341 struct iscsi_bus_flash_session *fnode_sess = NULL;
1342 int ret = 0;
1343
1344 if (!iscsi_flashnode_bus_match(dev, NULL))
1345 goto exit_match_index;
1346
1347 fnode_sess = iscsi_dev_to_flash_session(dev);
1348 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1349
1350exit_match_index:
1351 return ret;
1352}
1353
1354/**
1355 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1356 * @shost: pointer to host data
8526cb11 1357 * @idx: index to match
c6a4bb2e
AC		 1358 *
1359 * Finds the flashnode session object for the passed index
1360 *
1361 * Returns:
1362 * pointer to found flashnode session object on success
1363 * %NULL on failure
1364 */
1365static struct iscsi_bus_flash_session *
8526cb11 1366iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
c6a4bb2e
AC		 1367{
1368 struct iscsi_bus_flash_session *fnode_sess = NULL;
1369 struct device *dev;
1370
8526cb11
MC		 1371 dev = device_find_child(&shost->shost_gendev, &idx,
1372 flashnode_match_index);
c6a4bb2e
AC		 1373 if (dev)
1374 fnode_sess = iscsi_dev_to_flash_session(dev);
1375
1376 return fnode_sess;
1377}
1378
1379/**
1380 * iscsi_find_flashnode_sess - finds flashnode session entry
1381 * @shost: pointer to host data
1382 * @data: pointer to data containing value to use for comparison
1383 * @fn: function pointer that does actual comparison
1384 *
1385 * Finds the flashnode session object comparing the data passed using logic
1386 * defined in passed function pointer
1387 *
1388 * Returns:
1389 * pointer to found flashnode session device object on success
1390 * %NULL on failure
1391 */
1392struct device *
1393iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1394 int (*fn)(struct device *dev, void *data))
1395{
8526cb11 1396 return device_find_child(&shost->shost_gendev, data, fn);
c6a4bb2e
AC		 1397}
1398EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1399
1400/**
1401 * iscsi_find_flashnode_conn - finds flashnode connection entry
1402 * @fnode_sess: pointer to parent flashnode session entry
c6a4bb2e
AC		 1403 *
1404 * Finds the flashnode connection object comparing the data passed using logic
1405 * defined in passed function pointer
1406 *
1407 * Returns:
1408 * pointer to found flashnode connection device object on success
1409 * %NULL on failure
1410 */
1411struct device *
8526cb11 1412iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
c6a4bb2e 1413{
8526cb11
MC		 1414 return device_find_child(&fnode_sess->dev, NULL,
1415 iscsi_is_flashnode_conn_dev);
c6a4bb2e
AC		 1416}
1417EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1418
1419static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1420{
1421 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1422 return 0;
1423
1424 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1425}
1426
1427/**
e227867f 1428 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
c6a4bb2e
AC		 1429 * @fnode_sess: pointer to flashnode session entry to be destroyed
1430 *
1431 * Deletes the flashnode session entry and all children flashnode connection
1432 * entries from sysfs
1433 */
1434void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1435{
1436 int err;
1437
1438 err = device_for_each_child(&fnode_sess->dev, NULL,
1439 iscsi_iter_destroy_flashnode_conn_fn);
1440 if (err)
1441 pr_err("Could not delete all connections for %s. Error %d.\n",
1442 fnode_sess->dev.kobj.name, err);
1443
1444 device_unregister(&fnode_sess->dev);
1445}
1446EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1447
1448static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1449{
1450 if (!iscsi_flashnode_bus_match(dev, NULL))
1451 return 0;
1452
1453 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1454 return 0;
1455}
1456
1457/**
e227867f 1458 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
c6a4bb2e
AC		 1459 * @shost: pointer to host data
1460 *
1461 * Destroys all the flashnode session entries and all corresponding children
1462 * flashnode connection entries from sysfs
1463 */
1464void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1465{
1466 device_for_each_child(&shost->shost_gendev, NULL,
1467 iscsi_iter_destroy_flashnode_fn);
1468}
1469EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1470
90eeb01a
MC		 1471/*
1472 * BSG support
1473 */
1474/**
1475 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1476 * @job: bsg job to be processed
1477 */
1478static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1479{
1480 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1481 struct iscsi_bsg_request *req = job->request;
1482 struct iscsi_bsg_reply *reply = job->reply;
1483 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1484 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1485 int ret;
1486
1487 /* check if we have the msgcode value at least */
1488 if (job->request_len < sizeof(uint32_t)) {
1489 ret = -ENOMSG;
1490 goto fail_host_msg;
1491 }
1492
1493 /* Validate the host command */
1494 switch (req->msgcode) {
1495 case ISCSI_BSG_HST_VENDOR:
1496 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1497 if ((shost->hostt->vendor_id == 0L) ||
1498 (req->rqst_data.h_vendor.vendor_id !=
1499 shost->hostt->vendor_id)) {
1500 ret = -ESRCH;
1501 goto fail_host_msg;
1502 }
1503 break;
1504 default:
1505 ret = -EBADR;
1506 goto fail_host_msg;
1507 }
1508
1509 /* check if we really have all the request data needed */
1510 if (job->request_len < cmdlen) {
1511 ret = -ENOMSG;
1512 goto fail_host_msg;
1513 }
1514
1515 ret = i->iscsi_transport->bsg_request(job);
1516 if (!ret)
1517 return 0;
1518
1519fail_host_msg:
1520 /* return the errno failure code as the only status */
1521 BUG_ON(job->reply_len < sizeof(uint32_t));
1522 reply->reply_payload_rcv_len = 0;
1523 reply->result = ret;
1524 job->reply_len = sizeof(uint32_t);
1525 bsg_job_done(job, ret, 0);
1526 return 0;
1527}
1528
1529/**
1530 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1531 * @shost: shost for iscsi_host
eae627e4 1532 * @ihost: iscsi_cls_host adding the structures to
90eeb01a
MC		 1533 */
1534static int
1535iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1536{
1537 struct device *dev = &shost->shost_gendev;
1538 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1539 struct request_queue *q;
1540 char bsg_name[20];
1541 int ret;
1542
1543 if (!i->iscsi_transport->bsg_request)
1544 return -ENOTSUPP;
1545
1546 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1547
1548 q = __scsi_alloc_queue(shost, bsg_request_fn);
1549 if (!q)
1550 return -ENOMEM;
1551
1552 ret = bsg_setup_queue(dev, q, bsg_name, iscsi_bsg_host_dispatch, 0);
1553 if (ret) {
1554 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1555 "initialize - no request queue\n");
1556 blk_cleanup_queue(q);
1557 return ret;
1558 }
1559
1560 ihost->bsg_q = q;
1561 return 0;
1562}
1563
30a6c652 1564static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
ee959b00 1565 struct device *cdev)
30a6c652
MC		 1566{
1567 struct Scsi_Host *shost = dev_to_shost(dev);
32c6e1b9 1568 struct iscsi_cls_host *ihost = shost->shost_data;
30a6c652
MC		 1569
1570 memset(ihost, 0, sizeof(*ihost));
8aae18ad 1571 atomic_set(&ihost->nr_scans, 0);
7970634b 1572 mutex_init(&ihost->mutex);
90eeb01a
MC		 1573
1574 iscsi_bsg_host_add(shost, ihost);
1575 /* ignore any bsg add error - we just can't do sgio */
1576
1577 return 0;
1578}
1579
1580static int iscsi_remove_host(struct transport_container *tc,
1581 struct device *dev, struct device *cdev)
1582{
1583 struct Scsi_Host *shost = dev_to_shost(dev);
1584 struct iscsi_cls_host *ihost = shost->shost_data;
1585
1586 if (ihost->bsg_q) {
86072d81 1587 bsg_unregister_queue(ihost->bsg_q);
90eeb01a
MC		 1588 blk_cleanup_queue(ihost->bsg_q);
1589 }
30a6c652
MC		 1590 return 0;
1591}
1592
1593static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1594 "iscsi_host",
1595 iscsi_setup_host,
90eeb01a 1596 iscsi_remove_host,
30a6c652
MC		 1597 NULL);
1598
0896b752
AA		 1599static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1600 "iscsi_session",
1da177e4
LT		 1601 NULL,
1602 NULL,
1603 NULL);
1604
0896b752
AA		 1605static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1606 "iscsi_connection",
1da177e4
LT		 1607 NULL,
1608 NULL,
1609 NULL);
0896b752
AA		 1610
1611static struct sock *nls;
0b950672 1612static DEFINE_MUTEX(rx_queue_mutex);
0896b752 1613
7b7232f3
MC		 1614static LIST_HEAD(sesslist);
1615static DEFINE_SPINLOCK(sesslock);
7b8631b5
MC		 1616static LIST_HEAD(connlist);
1617static DEFINE_SPINLOCK(connlock);
0896b752 1618
b5c7a12d
MC		 1619static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1620{
1621 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1622 return sess->sid;
1623}
1624
1625/*
1626 * Returns the matching session to a given sid
1627 */
1628static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
7b7232f3
MC		 1629{
1630 unsigned long flags;
1631 struct iscsi_cls_session *sess;
1632
1633 spin_lock_irqsave(&sesslock, flags);
1634 list_for_each_entry(sess, &sesslist, sess_list) {
b5c7a12d 1635 if (sess->sid == sid) {
7b7232f3
MC		 1636 spin_unlock_irqrestore(&sesslock, flags);
1637 return sess;
1638 }
1639 }
1640 spin_unlock_irqrestore(&sesslock, flags);
1641 return NULL;
1642}
1643
b5c7a12d
MC		 1644/*
1645 * Returns the matching connection to a given sid / cid tuple
1646 */
1647static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
7b7232f3
MC		 1648{
1649 unsigned long flags;
1650 struct iscsi_cls_conn *conn;
1651
1652 spin_lock_irqsave(&connlock, flags);
1653 list_for_each_entry(conn, &connlist, conn_list) {
b5c7a12d 1654 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
7b7232f3
MC		 1655 spin_unlock_irqrestore(&connlock, flags);
1656 return conn;
1657 }
1658 }
1659 spin_unlock_irqrestore(&connlock, flags);
1660 return NULL;
1661}
1662
7b8631b5
MC		 1663/*
1664 * The following functions can be used by LLDs that allocate
1665 * their own scsi_hosts or by software iscsi LLDs
1666 */
6eabafbe
MC		 1667static struct {
1668 int value;
1669 char *name;
1670} iscsi_session_state_names[] = {
1671 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1672 { ISCSI_SESSION_FAILED, "FAILED" },
1673 { ISCSI_SESSION_FREE, "FREE" },
1674};
1675
3b0f208a 1676static const char *iscsi_session_state_name(int state)
6eabafbe
MC		 1677{
1678 int i;
1679 char *name = NULL;
1680
1681 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1682 if (iscsi_session_state_names[i].value == state) {
1683 name = iscsi_session_state_names[i].name;
1684 break;
1685 }
1686 }
1687 return name;
1688}
1689
1690int iscsi_session_chkready(struct iscsi_cls_session *session)
1691{
1692 unsigned long flags;
1693 int err;
1694
1695 spin_lock_irqsave(&session->lock, flags);
1696 switch (session->state) {
1697 case ISCSI_SESSION_LOGGED_IN:
1698 err = 0;
1699 break;
1700 case ISCSI_SESSION_FAILED:
9a1a69a1 1701 err = DID_IMM_RETRY << 16;
6eabafbe
MC		 1702 break;
1703 case ISCSI_SESSION_FREE:
56d7fcfa 1704 err = DID_TRANSPORT_FAILFAST << 16;
6eabafbe
MC		 1705 break;
1706 default:
1707 err = DID_NO_CONNECT << 16;
1708 break;
1709 }
1710 spin_unlock_irqrestore(&session->lock, flags);
1711 return err;
1712}
1713EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1714
17fa575e
MR		 1715int iscsi_is_session_online(struct iscsi_cls_session *session)
1716{
1717 unsigned long flags;
1718 int ret = 0;
1719
1720 spin_lock_irqsave(&session->lock, flags);
1721 if (session->state == ISCSI_SESSION_LOGGED_IN)
1722 ret = 1;
1723 spin_unlock_irqrestore(&session->lock, flags);
1724 return ret;
1725}
1726EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1727
7b8631b5
MC		 1728static void iscsi_session_release(struct device *dev)
1729{
1730 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
7b8631b5 1731 struct Scsi_Host *shost;
0896b752 1732
7b8631b5
MC		 1733 shost = iscsi_session_to_shost(session);
1734 scsi_host_put(shost);
632248aa 1735 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
7b8631b5 1736 kfree(session);
7b8631b5 1737}
0896b752 1738
6260a5d2 1739int iscsi_is_session_dev(const struct device *dev)
7b8631b5
MC		 1740{
1741 return dev->release == iscsi_session_release;
1742}
6260a5d2 1743EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
0896b752 1744
a4804cd6
MC		 1745static int iscsi_iter_session_fn(struct device *dev, void *data)
1746{
1747 void (* fn) (struct iscsi_cls_session *) = data;
1748
1749 if (!iscsi_is_session_dev(dev))
1750 return 0;
1751 fn(iscsi_dev_to_session(dev));
1752 return 0;
1753}
1754
1755void iscsi_host_for_each_session(struct Scsi_Host *shost,
1756 void (*fn)(struct iscsi_cls_session *))
1757{
1758 device_for_each_child(&shost->shost_gendev, fn,
1759 iscsi_iter_session_fn);
1760}
1761EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1762
8aae18ad
MC		 1763/**
1764 * iscsi_scan_finished - helper to report when running scans are done
1765 * @shost: scsi host
1766 * @time: scan run time
1767 *
1768 * This function can be used by drives like qla4xxx to report to the scsi
1769 * layer when the scans it kicked off at module load time are done.
1770 */
1771int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1772{
32c6e1b9 1773 struct iscsi_cls_host *ihost = shost->shost_data;
8aae18ad
MC		 1774 /*
1775 * qla4xxx will have kicked off some session unblocks before calling
1776 * scsi_scan_host, so just wait for them to complete.
1777 */
1778 return !atomic_read(&ihost->nr_scans);
1779}
1780EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1781
7970634b
MC		 1782struct iscsi_scan_data {
1783 unsigned int channel;
1784 unsigned int id;
9cb78c16 1785 u64 lun;
7970634b
MC		 1786};
1787
1788static int iscsi_user_scan_session(struct device *dev, void *data)
30a6c652 1789{
7970634b 1790 struct iscsi_scan_data *scan_data = data;
30a6c652 1791 struct iscsi_cls_session *session;
7970634b
MC		 1792 struct Scsi_Host *shost;
1793 struct iscsi_cls_host *ihost;
1794 unsigned long flags;
1795 unsigned int id;
1796
1797 if (!iscsi_is_session_dev(dev))
1798 return 0;
1799
1800 session = iscsi_dev_to_session(dev);
632248aa
MC		 1801
1802 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1803
7970634b
MC		 1804 shost = iscsi_session_to_shost(session);
1805 ihost = shost->shost_data;
30a6c652
MC		 1806
1807 mutex_lock(&ihost->mutex);
7970634b
MC		 1808 spin_lock_irqsave(&session->lock, flags);
1809 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1810 spin_unlock_irqrestore(&session->lock, flags);
632248aa 1811 goto user_scan_exit;
30a6c652 1812 }
7970634b
MC		 1813 id = session->target_id;
1814 spin_unlock_irqrestore(&session->lock, flags);
30a6c652 1815
7970634b
MC		 1816 if (id != ISCSI_MAX_TARGET) {
1817 if ((scan_data->channel == SCAN_WILD_CARD ||
1818 scan_data->channel == 0) &&
1819 (scan_data->id == SCAN_WILD_CARD ||
1820 scan_data->id == id))
1821 scsi_scan_target(&session->dev, 0, id,
1822 scan_data->lun, 1);
1823 }
632248aa
MC		 1824
1825user_scan_exit:
7970634b 1826 mutex_unlock(&ihost->mutex);
632248aa 1827 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
30a6c652
MC		 1828 return 0;
1829}
1830
7970634b 1831static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
9cb78c16 1832 uint id, u64 lun)
7970634b
MC		 1833{
1834 struct iscsi_scan_data scan_data;
1835
1836 scan_data.channel = channel;
1837 scan_data.id = id;
1838 scan_data.lun = lun;
1839
1840 return device_for_each_child(&shost->shost_gendev, &scan_data,
1841 iscsi_user_scan_session);
1842}
1843
bd976f62
MC		 1844static void iscsi_scan_session(struct work_struct *work)
1845{
1846 struct iscsi_cls_session *session =
1847 container_of(work, struct iscsi_cls_session, scan_work);
8aae18ad 1848 struct Scsi_Host *shost = iscsi_session_to_shost(session);
32c6e1b9 1849 struct iscsi_cls_host *ihost = shost->shost_data;
7970634b 1850 struct iscsi_scan_data scan_data;
bd976f62 1851
7970634b
MC		 1852 scan_data.channel = 0;
1853 scan_data.id = SCAN_WILD_CARD;
1854 scan_data.lun = SCAN_WILD_CARD;
bd976f62 1855
7970634b 1856 iscsi_user_scan_session(&session->dev, &scan_data);
8aae18ad 1857 atomic_dec(&ihost->nr_scans);
bd976f62
MC		 1858}
1859
c01be6dc
MC		 1860/**
1861 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
e6d4ef45 1862 * @cmd: scsi cmd passed to scsi eh handler
c01be6dc
MC		 1863 *
1864 * If the session is down this function will wait for the recovery
1865 * timer to fire or for the session to be logged back in. If the
1866 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1867 * should pass this error value to the scsi eh.
1868 */
1869int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1870{
1871 struct iscsi_cls_session *session =
1872 starget_to_session(scsi_target(cmd->device));
1873 unsigned long flags;
1874 int ret = 0;
1875
1876 spin_lock_irqsave(&session->lock, flags);
1877 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1878 if (session->state == ISCSI_SESSION_FREE) {
1879 ret = FAST_IO_FAIL;
1880 break;
1881 }
1882 spin_unlock_irqrestore(&session->lock, flags);
1883 msleep(1000);
1884 spin_lock_irqsave(&session->lock, flags);
1885 }
1886 spin_unlock_irqrestore(&session->lock, flags);
1887 return ret;
1888}
1889EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1890
c4028958 1891static void session_recovery_timedout(struct work_struct *work)
30a6c652 1892{
c4028958
DH		 1893 struct iscsi_cls_session *session =
1894 container_of(work, struct iscsi_cls_session,
1895 recovery_work.work);
6eabafbe 1896 unsigned long flags;
30a6c652 1897
322d739d
MC		 1898 iscsi_cls_session_printk(KERN_INFO, session,
1899 "session recovery timed out after %d secs\n",
1900 session->recovery_tmo);
30a6c652 1901
6eabafbe
MC		 1902 spin_lock_irqsave(&session->lock, flags);
1903 switch (session->state) {
1904 case ISCSI_SESSION_FAILED:
1905 session->state = ISCSI_SESSION_FREE;
1906 break;
1907 case ISCSI_SESSION_LOGGED_IN:
1908 case ISCSI_SESSION_FREE:
1909 /* we raced with the unblock's flush */
1910 spin_unlock_irqrestore(&session->lock, flags);
1911 return;
1912 }
1913 spin_unlock_irqrestore(&session->lock, flags);
1914
30a6c652
MC		 1915 if (session->transport->session_recovery_timedout)
1916 session->transport->session_recovery_timedout(session);
1917
632248aa 1918 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
5d9fb5cc 1919 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
632248aa 1920 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
30a6c652
MC		 1921}
1922
45ab33b6 1923static void __iscsi_unblock_session(struct work_struct *work)
6eabafbe 1924{
45ab33b6
MC		 1925 struct iscsi_cls_session *session =
1926 container_of(work, struct iscsi_cls_session,
1927 unblock_work);
bd976f62 1928 struct Scsi_Host *shost = iscsi_session_to_shost(session);
32c6e1b9 1929 struct iscsi_cls_host *ihost = shost->shost_data;
6eabafbe
MC		 1930 unsigned long flags;
1931
632248aa 1932 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
45ab33b6
MC		 1933 /*
1934 * The recovery and unblock work get run from the same workqueue,
1935 * so try to cancel it if it was going to run after this unblock.
1936 */
1937 cancel_delayed_work(&session->recovery_work);
6eabafbe
MC		 1938 spin_lock_irqsave(&session->lock, flags);
1939 session->state = ISCSI_SESSION_LOGGED_IN;
1940 spin_unlock_irqrestore(&session->lock, flags);
45ab33b6 1941 /* start IO */
5d9fb5cc 1942 scsi_target_unblock(&session->dev, SDEV_RUNNING);
8aae18ad
MC		 1943 /*
1944 * Only do kernel scanning if the driver is properly hooked into
1945 * the async scanning code (drivers like iscsi_tcp do login and
1946 * scanning from userspace).
1947 */
1948 if (shost->hostt->scan_finished) {
06d25af4 1949 if (scsi_queue_work(shost, &session->scan_work))
8aae18ad
MC		 1950 atomic_inc(&ihost->nr_scans);
1951 }
632248aa 1952 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
6eabafbe 1953}
45ab33b6
MC		 1954
1955/**
1956 * iscsi_unblock_session - set a session as logged in and start IO.
1957 * @session: iscsi session
1958 *
1959 * Mark a session as ready to accept IO.
1960 */
1961void iscsi_unblock_session(struct iscsi_cls_session *session)
1962{
1963 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1964 /*
1965 * make sure all the events have completed before tell the driver
1966 * it is safe
1967 */
1968 flush_workqueue(iscsi_eh_timer_workq);
1969}
30a6c652
MC		 1970EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1971
45ab33b6 1972static void __iscsi_block_session(struct work_struct *work)
30a6c652 1973{
45ab33b6
MC		 1974 struct iscsi_cls_session *session =
1975 container_of(work, struct iscsi_cls_session,
1976 block_work);
6eabafbe
MC		 1977 unsigned long flags;
1978
632248aa 1979 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
6eabafbe
MC		 1980 spin_lock_irqsave(&session->lock, flags);
1981 session->state = ISCSI_SESSION_FAILED;
1982 spin_unlock_irqrestore(&session->lock, flags);
30a6c652 1983 scsi_target_block(&session->dev);
632248aa 1984 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
fdd46dcb
MC		 1985 if (session->recovery_tmo >= 0)
1986 queue_delayed_work(iscsi_eh_timer_workq,
1987 &session->recovery_work,
1988 session->recovery_tmo * HZ);
30a6c652 1989}
45ab33b6
MC		 1990
1991void iscsi_block_session(struct iscsi_cls_session *session)
1992{
1993 queue_work(iscsi_eh_timer_workq, &session->block_work);
1994}
30a6c652
MC		 1995EXPORT_SYMBOL_GPL(iscsi_block_session);
1996
26974789
MC		 1997static void __iscsi_unbind_session(struct work_struct *work)
1998{
1999 struct iscsi_cls_session *session =
2000 container_of(work, struct iscsi_cls_session,
2001 unbind_work);
2002 struct Scsi_Host *shost = iscsi_session_to_shost(session);
32c6e1b9 2003 struct iscsi_cls_host *ihost = shost->shost_data;
7970634b 2004 unsigned long flags;
8d4a690c 2005 unsigned int target_id;
26974789 2006
632248aa
MC		 2007 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2008
26974789
MC		 2009 /* Prevent new scans and make sure scanning is not in progress */
2010 mutex_lock(&ihost->mutex);
7970634b
MC		 2011 spin_lock_irqsave(&session->lock, flags);
2012 if (session->target_id == ISCSI_MAX_TARGET) {
2013 spin_unlock_irqrestore(&session->lock, flags);
26974789
MC		 2014 mutex_unlock(&ihost->mutex);
2015 return;
2016 }
8d4a690c
MC		 2017
2018 target_id = session->target_id;
7970634b
MC		 2019 session->target_id = ISCSI_MAX_TARGET;
2020 spin_unlock_irqrestore(&session->lock, flags);
26974789
MC		 2021 mutex_unlock(&ihost->mutex);
2022
8d4a690c
MC		 2023 if (session->ida_used)
2024 ida_simple_remove(&iscsi_sess_ida, target_id);
2025
26974789
MC		 2026 scsi_remove_target(&session->dev);
2027 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
632248aa 2028 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
26974789
MC		 2029}
2030
7b8631b5 2031struct iscsi_cls_session *
5d91e209
MC		 2032iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2033 int dd_size)
7b8631b5
MC		 2034{
2035 struct iscsi_cls_session *session;
7b8631b5 2036
5d91e209 2037 session = kzalloc(sizeof(*session) + dd_size,
b5c7a12d 2038 GFP_KERNEL);
7b8631b5 2039 if (!session)
f53a88da
MC		 2040 return NULL;
2041
7b8631b5 2042 session->transport = transport;
0c70d84b 2043 session->creator = -1;
30a6c652 2044 session->recovery_tmo = 120;
6eabafbe 2045 session->state = ISCSI_SESSION_FREE;
c4028958 2046 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
30a6c652 2047 INIT_LIST_HEAD(&session->sess_list);
45ab33b6
MC		 2048 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2049 INIT_WORK(&session->block_work, __iscsi_block_session);
26974789 2050 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
bd976f62 2051 INIT_WORK(&session->scan_work, iscsi_scan_session);
6eabafbe 2052 spin_lock_init(&session->lock);
7b8631b5 2053
6a8a0d36
MC		 2054 /* this is released in the dev's release function */
2055 scsi_host_get(shost);
8434aa8b
MC		 2056 session->dev.parent = &shost->shost_gendev;
2057 session->dev.release = iscsi_session_release;
2058 device_initialize(&session->dev);
5d91e209 2059 if (dd_size)
b5c7a12d 2060 session->dd_data = &session[1];
632248aa
MC		 2061
2062 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
8434aa8b
MC		 2063 return session;
2064}
2065EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2066
6a8a0d36 2067int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
8434aa8b
MC		 2068{
2069 struct Scsi_Host *shost = iscsi_session_to_shost(session);
32c6e1b9 2070 struct iscsi_cls_host *ihost;
26974789 2071 unsigned long flags;
8d4a690c 2072 int id = 0;
8434aa8b 2073 int err;
b5c7a12d 2074
30a6c652 2075 ihost = shost->shost_data;
41be1444 2076 session->sid = atomic_add_return(1, &iscsi_session_nr);
7970634b 2077
8d4a690c
MC		 2078 if (target_id == ISCSI_MAX_TARGET) {
2079 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
7970634b 2080
8d4a690c 2081 if (id < 0) {
7970634b 2082 iscsi_cls_session_printk(KERN_ERR, session,
8d4a690c
MC		 2083 "Failure in Target ID Allocation\n");
2084 return id;
7970634b 2085 }
8d4a690c
MC		 2086 session->target_id = (unsigned int)id;
2087 session->ida_used = true;
2088 } else
2089 session->target_id = target_id;
30a6c652 2090
71610f55 2091 dev_set_name(&session->dev, "session%u", session->sid);
8434aa8b 2092 err = device_add(&session->dev);
7b8631b5 2093 if (err) {
322d739d
MC		 2094 iscsi_cls_session_printk(KERN_ERR, session,
2095 "could not register session's dev\n");
8d4a690c 2096 goto release_ida;
7b8631b5
MC		 2097 }
2098 transport_register_device(&session->dev);
2099
26974789
MC		 2100 spin_lock_irqsave(&sesslock, flags);
2101 list_add(&session->sess_list, &sesslist);
2102 spin_unlock_irqrestore(&sesslock, flags);
2103
26974789 2104 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
632248aa 2105 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
8434aa8b 2106 return 0;
30a6c652 2107
8d4a690c
MC		 2108release_ida:
2109 if (session->ida_used)
2110 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2111
8434aa8b 2112 return err;
7b8631b5 2113}
8434aa8b 2114EXPORT_SYMBOL_GPL(iscsi_add_session);
7b8631b5
MC		 2115
2116/**
8434aa8b
MC		 2117 * iscsi_create_session - create iscsi class session
2118 * @shost: scsi host
2119 * @transport: iscsi transport
5d91e209 2120 * @dd_size: private driver data size
eb44820c 2121 * @target_id: which target
7b8631b5 2122 *
8434aa8b 2123 * This can be called from a LLD or iscsi_transport.
eb44820c 2124 */
8434aa8b 2125struct iscsi_cls_session *
5d91e209
MC		 2126iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2127 int dd_size, unsigned int target_id)
8434aa8b
MC		 2128{
2129 struct iscsi_cls_session *session;
2130
5d91e209 2131 session = iscsi_alloc_session(shost, transport, dd_size);
8434aa8b
MC		 2132 if (!session)
2133 return NULL;
2134
6a8a0d36 2135 if (iscsi_add_session(session, target_id)) {
8434aa8b
MC		 2136 iscsi_free_session(session);
2137 return NULL;
2138 }
2139 return session;
2140}
2141EXPORT_SYMBOL_GPL(iscsi_create_session);
2142
26974789
MC		 2143static void iscsi_conn_release(struct device *dev)
2144{
2145 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2146 struct device *parent = conn->dev.parent;
2147
632248aa 2148 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
26974789
MC		 2149 kfree(conn);
2150 put_device(parent);
2151}
2152
2153static int iscsi_is_conn_dev(const struct device *dev)
2154{
2155 return dev->release == iscsi_conn_release;
2156}
2157
2158static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2159{
2160 if (!iscsi_is_conn_dev(dev))
2161 return 0;
2162 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2163}
2164
8434aa8b 2165void iscsi_remove_session(struct iscsi_cls_session *session)
7b8631b5 2166{
30a6c652 2167 struct Scsi_Host *shost = iscsi_session_to_shost(session);
26974789
MC		 2168 unsigned long flags;
2169 int err;
2170
632248aa
MC		 2171 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2172
26974789
MC		 2173 spin_lock_irqsave(&sesslock, flags);
2174 list_del(&session->sess_list);
2175 spin_unlock_irqrestore(&sesslock, flags);
30a6c652 2176
45ab33b6
MC		 2177 /* make sure there are no blocks/unblocks queued */
2178 flush_workqueue(iscsi_eh_timer_workq);
2179 /* make sure the timedout callout is not running */
2180 if (!cancel_delayed_work(&session->recovery_work))
2181 flush_workqueue(iscsi_eh_timer_workq);
26974789
MC		 2182 /*
2183 * If we are blocked let commands flow again. The lld or iscsi
2184 * layer should set up the queuecommand to fail commands.
45ab33b6
MC		 2185 * We assume that LLD will not be calling block/unblock while
2186 * removing the session.
26974789 2187 */
6eabafbe
MC		 2188 spin_lock_irqsave(&session->lock, flags);
2189 session->state = ISCSI_SESSION_FREE;
2190 spin_unlock_irqrestore(&session->lock, flags);
bd976f62 2191
5d9fb5cc 2192 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
45ab33b6 2193 /* flush running scans then delete devices */
06d25af4 2194 scsi_flush_work(shost);
45ab33b6 2195 __iscsi_unbind_session(&session->unbind_work);
30a6c652 2196
26974789
MC		 2197 /* hw iscsi may not have removed all connections from session */
2198 err = device_for_each_child(&session->dev, NULL,
2199 iscsi_iter_destroy_conn_fn);
2200 if (err)
322d739d
MC		 2201 iscsi_cls_session_printk(KERN_ERR, session,
2202 "Could not delete all connections "
2203 "for session. Error %d.\n", err);
8434aa8b 2204
7b8631b5 2205 transport_unregister_device(&session->dev);
632248aa
MC		 2206
2207 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
8434aa8b
MC		 2208 device_del(&session->dev);
2209}
2210EXPORT_SYMBOL_GPL(iscsi_remove_session);
2211
2212void iscsi_free_session(struct iscsi_cls_session *session)
2213{
632248aa 2214 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
26974789 2215 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
8434aa8b 2216 put_device(&session->dev);
7b8631b5 2217}
8434aa8b
MC		 2218EXPORT_SYMBOL_GPL(iscsi_free_session);
2219
2220/**
2221 * iscsi_destroy_session - destroy iscsi session
2222 * @session: iscsi_session
2223 *
2224 * Can be called by a LLD or iscsi_transport. There must not be
2225 * any running connections.
eb44820c 2226 */
8434aa8b
MC		 2227int iscsi_destroy_session(struct iscsi_cls_session *session)
2228{
2229 iscsi_remove_session(session);
632248aa 2230 ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
8434aa8b
MC		 2231 iscsi_free_session(session);
2232 return 0;
2233}
7b8631b5
MC		 2234EXPORT_SYMBOL_GPL(iscsi_destroy_session);
2235
7b8631b5
MC		 2236/**
2237 * iscsi_create_conn - create iscsi class connection
2238 * @session: iscsi cls session
5d91e209 2239 * @dd_size: private driver data size
7b8631b5
MC		 2240 * @cid: connection id
2241 *
2242 * This can be called from a LLD or iscsi_transport. The connection
2243 * is child of the session so cid must be unique for all connections
2244 * on the session.
b5c7a12d
MC		 2245 *
2246 * Since we do not support MCS, cid will normally be zero. In some cases
2247 * for software iscsi we could be trying to preallocate a connection struct
2248 * in which case there could be two connection structs and cid would be
2249 * non-zero.
eb44820c 2250 */
7b8631b5 2251struct iscsi_cls_conn *
5d91e209 2252iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
7b8631b5
MC		 2253{
2254 struct iscsi_transport *transport = session->transport;
7b8631b5 2255 struct iscsi_cls_conn *conn;
26974789 2256 unsigned long flags;
7b8631b5
MC		 2257 int err;
2258
5d91e209 2259 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
7b8631b5
MC		 2260 if (!conn)
2261 return NULL;
5d91e209 2262 if (dd_size)
7b8631b5
MC		 2263 conn->dd_data = &conn[1];
2264
22a39fbb 2265 mutex_init(&conn->ep_mutex);
7b8631b5
MC		 2266 INIT_LIST_HEAD(&conn->conn_list);
2267 conn->transport = transport;
b5c7a12d 2268 conn->cid = cid;
7b8631b5
MC		 2269
2270 /* this is released in the dev's release function */
2271 if (!get_device(&session->dev))
43a145a3 2272 goto free_conn;
b5c7a12d 2273
71610f55 2274 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
7b8631b5
MC		 2275 conn->dev.parent = &session->dev;
2276 conn->dev.release = iscsi_conn_release;
2277 err = device_register(&conn->dev);
2278 if (err) {
322d739d
MC		 2279 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2280 "register connection's dev\n");
7b8631b5
MC		 2281 goto release_parent_ref;
2282 }
2283 transport_register_device(&conn->dev);
26974789
MC		 2284
2285 spin_lock_irqsave(&connlock, flags);
2286 list_add(&conn->conn_list, &connlist);
26974789 2287 spin_unlock_irqrestore(&connlock, flags);
632248aa
MC		 2288
2289 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
7b8631b5
MC		 2290 return conn;
2291
2292release_parent_ref:
2293 put_device(&session->dev);
2294free_conn:
2295 kfree(conn);
2296 return NULL;
2297}
2298
2299EXPORT_SYMBOL_GPL(iscsi_create_conn);
2300
2301/**
2302 * iscsi_destroy_conn - destroy iscsi class connection
eb44820c 2303 * @conn: iscsi cls session
7b8631b5 2304 *
26974789 2305 * This can be called from a LLD or iscsi_transport.
eb44820c 2306 */
7b8631b5
MC		 2307int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2308{
26974789
MC		 2309 unsigned long flags;
2310
2311 spin_lock_irqsave(&connlock, flags);
26974789
MC		 2312 list_del(&conn->conn_list);
2313 spin_unlock_irqrestore(&connlock, flags);
2314
7b8631b5 2315 transport_unregister_device(&conn->dev);
632248aa 2316 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
7b8631b5
MC		 2317 device_unregister(&conn->dev);
2318 return 0;
2319}
7b8631b5
MC		 2320EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2321
7b8631b5
MC		 2322/*
2323 * iscsi interface functions
2324 */
0896b752
AA		 2325static struct iscsi_internal *
2326iscsi_if_transport_lookup(struct iscsi_transport *tt)
2327{
2328 struct iscsi_internal *priv;
2329 unsigned long flags;
2330
2331 spin_lock_irqsave(&iscsi_transport_lock, flags);
2332 list_for_each_entry(priv, &iscsi_transports, list) {
2333 if (tt == priv->iscsi_transport) {
2334 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2335 return priv;
2336 }
2337 }
2338 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2339 return NULL;
2340}
1da177e4 2341
53cb8a1f 2342static int
43514774 2343iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
53cb8a1f 2344{
43514774 2345 return nlmsg_multicast(nls, skb, 0, group, gfp);
1da177e4 2346}
1da177e4 2347
7b7232f3 2348int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
0896b752 2349 char *data, uint32_t data_size)
1da177e4 2350{
0896b752
AA		 2351 struct nlmsghdr *nlh;
2352 struct sk_buff *skb;
2353 struct iscsi_uevent *ev;
0896b752 2354 char *pdu;
790f39a2 2355 struct iscsi_internal *priv;
e07ebea0
H		 2356 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2357 data_size);
0896b752 2358
790f39a2
MC		 2359 priv = iscsi_if_transport_lookup(conn->transport);
2360 if (!priv)
2361 return -EINVAL;
2362
43a145a3 2363 skb = alloc_skb(len, GFP_ATOMIC);
0896b752 2364 if (!skb) {
e5bd7b54 2365 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
322d739d
MC		 2366 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2367 "control PDU: OOM\n");
0896b752
AA		 2368 return -ENOMEM;
2369 }
1da177e4 2370
43514774 2371 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2372 ev = nlmsg_data(nlh);
0896b752
AA		 2373 memset(ev, 0, sizeof(*ev));
2374 ev->transport_handle = iscsi_handle(conn->transport);
2375 ev->type = ISCSI_KEVENT_RECV_PDU;
b5c7a12d
MC		 2376 ev->r.recv_req.cid = conn->cid;
2377 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
0896b752
AA		 2378 pdu = (char*)ev + sizeof(*ev);
2379 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2380 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
1da177e4 2381
43514774 2382 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
1da177e4 2383}
0896b752 2384EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
1da177e4 2385
43514774
MC		 2386int iscsi_offload_mesg(struct Scsi_Host *shost,
2387 struct iscsi_transport *transport, uint32_t type,
2388 char *data, uint16_t data_size)
2389{
2390 struct nlmsghdr *nlh;
2391 struct sk_buff *skb;
2392 struct iscsi_uevent *ev;
e07ebea0 2393 int len = nlmsg_total_size(sizeof(*ev) + data_size);
43514774 2394
a541f840 2395 skb = alloc_skb(len, GFP_ATOMIC);
43514774
MC		 2396 if (!skb) {
2397 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2398 return -ENOMEM;
2399 }
2400
2401 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2402 ev = nlmsg_data(nlh);
43514774
MC		 2403 memset(ev, 0, sizeof(*ev));
2404 ev->type = type;
2405 ev->transport_handle = iscsi_handle(transport);
2406 switch (type) {
2407 case ISCSI_KEVENT_PATH_REQ:
2408 ev->r.req_path.host_no = shost->host_no;
2409 break;
2410 case ISCSI_KEVENT_IF_DOWN:
2411 ev->r.notify_if_down.host_no = shost->host_no;
2412 break;
2413 }
2414
2415 memcpy((char *)ev + sizeof(*ev), data, data_size);
2416
a541f840 2417 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
43514774
MC		 2418}
2419EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2420
e5bd7b54 2421void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
1da177e4 2422{
0896b752
AA		 2423 struct nlmsghdr *nlh;
2424 struct sk_buff *skb;
2425 struct iscsi_uevent *ev;
790f39a2 2426 struct iscsi_internal *priv;
e07ebea0 2427 int len = nlmsg_total_size(sizeof(*ev));
0896b752 2428
790f39a2
MC		 2429 priv = iscsi_if_transport_lookup(conn->transport);
2430 if (!priv)
2431 return;
2432
43a145a3 2433 skb = alloc_skb(len, GFP_ATOMIC);
0896b752 2434 if (!skb) {
322d739d
MC		 2435 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2436 "conn error (%d)\n", error);
0896b752
AA		 2437 return;
2438 }
2439
43514774 2440 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2441 ev = nlmsg_data(nlh);
0896b752
AA		 2442 ev->transport_handle = iscsi_handle(conn->transport);
2443 ev->type = ISCSI_KEVENT_CONN_ERROR;
0896b752 2444 ev->r.connerror.error = error;
b5c7a12d
MC		 2445 ev->r.connerror.cid = conn->cid;
2446 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
1da177e4 2447
43514774 2448 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
1da177e4 2449
322d739d
MC		 2450 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2451 error);
0896b752 2452}
e5bd7b54 2453EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
0896b752 2454
17fa575e
MR		 2455void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2456 enum iscsi_conn_state state)
2457{
2458 struct nlmsghdr *nlh;
2459 struct sk_buff *skb;
2460 struct iscsi_uevent *ev;
2461 struct iscsi_internal *priv;
e07ebea0 2462 int len = nlmsg_total_size(sizeof(*ev));
17fa575e
MR		 2463
2464 priv = iscsi_if_transport_lookup(conn->transport);
2465 if (!priv)
2466 return;
2467
2468 skb = alloc_skb(len, GFP_ATOMIC);
2469 if (!skb) {
2470 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2471 "conn login (%d)\n", state);
2472 return;
2473 }
2474
2475 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2476 ev = nlmsg_data(nlh);
17fa575e
MR		 2477 ev->transport_handle = iscsi_handle(conn->transport);
2478 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2479 ev->r.conn_login.state = state;
2480 ev->r.conn_login.cid = conn->cid;
2481 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2482 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2483
2484 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2485 state);
2486}
2487EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2488
a11e2545
VC		 2489void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2490 enum iscsi_host_event_code code, uint32_t data_size,
2491 uint8_t *data)
2492{
2493 struct nlmsghdr *nlh;
2494 struct sk_buff *skb;
2495 struct iscsi_uevent *ev;
e07ebea0 2496 int len = nlmsg_total_size(sizeof(*ev) + data_size);
a11e2545 2497
49d0e64b 2498 skb = alloc_skb(len, GFP_NOIO);
a11e2545
VC		 2499 if (!skb) {
2500 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2501 host_no, code);
2502 return;
2503 }
2504
2505 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2506 ev = nlmsg_data(nlh);
a11e2545
VC		 2507 ev->transport_handle = iscsi_handle(transport);
2508 ev->type = ISCSI_KEVENT_HOST_EVENT;
2509 ev->r.host_event.host_no = host_no;
2510 ev->r.host_event.code = code;
2511 ev->r.host_event.data_size = data_size;
2512
2513 if (data_size)
2514 memcpy((char *)ev + sizeof(*ev), data, data_size);
2515
49d0e64b 2516 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
a11e2545
VC		 2517}
2518EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2519
ac20c7bf
VC		 2520void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2521 uint32_t status, uint32_t pid, uint32_t data_size,
2522 uint8_t *data)
2523{
2524 struct nlmsghdr *nlh;
2525 struct sk_buff *skb;
2526 struct iscsi_uevent *ev;
e07ebea0 2527 int len = nlmsg_total_size(sizeof(*ev) + data_size);
ac20c7bf 2528
49d0e64b 2529 skb = alloc_skb(len, GFP_NOIO);
ac20c7bf
VC		 2530 if (!skb) {
2531 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2532 return;
2533 }
2534
2535 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2536 ev = nlmsg_data(nlh);
ac20c7bf
VC		 2537 ev->transport_handle = iscsi_handle(transport);
2538 ev->type = ISCSI_KEVENT_PING_COMP;
2539 ev->r.ping_comp.host_no = host_no;
2540 ev->r.ping_comp.status = status;
2541 ev->r.ping_comp.pid = pid;
2542 ev->r.ping_comp.data_size = data_size;
2543 memcpy((char *)ev + sizeof(*ev), data, data_size);
2544
49d0e64b 2545 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
ac20c7bf
VC		 2546}
2547EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2548
0896b752 2549static int
43514774
MC		 2550iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
2551 void *payload, int size)
0896b752
AA		 2552{
2553 struct sk_buff *skb;
2554 struct nlmsghdr *nlh;
e07ebea0 2555 int len = nlmsg_total_size(size);
0896b752
AA		 2556 int flags = multi ? NLM_F_MULTI : 0;
2557 int t = done ? NLMSG_DONE : type;
2558
43a145a3 2559 skb = alloc_skb(len, GFP_ATOMIC);
239a7dc2
MC		 2560 if (!skb) {
2561 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2562 return -ENOMEM;
2563 }
0896b752 2564
43514774 2565 nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
0896b752 2566 nlh->nlmsg_flags = flags;
e07ebea0 2567 memcpy(nlmsg_data(nlh), payload, size);
43514774 2568 return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
1da177e4 2569}
1da177e4 2570
7b8631b5 2571static int
5b940adf 2572iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
7b8631b5 2573{
e07ebea0 2574 struct iscsi_uevent *ev = nlmsg_data(nlh);
7b8631b5
MC		 2575 struct iscsi_stats *stats;
2576 struct sk_buff *skbstat;
2577 struct iscsi_cls_conn *conn;
2578 struct nlmsghdr *nlhstat;
2579 struct iscsi_uevent *evstat;
790f39a2 2580 struct iscsi_internal *priv;
e07ebea0
H		 2581 int len = nlmsg_total_size(sizeof(*ev) +
2582 sizeof(struct iscsi_stats) +
2583 sizeof(struct iscsi_stats_custom) *
2584 ISCSI_STATS_CUSTOM_MAX);
7b8631b5 2585 int err = 0;
0896b752 2586
790f39a2
MC		 2587 priv = iscsi_if_transport_lookup(transport);
2588 if (!priv)
2589 return -EINVAL;
2590
b5c7a12d 2591 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
7b8631b5
MC		 2592 if (!conn)
2593 return -EEXIST;
0896b752 2594
7b8631b5
MC		 2595 do {
2596 int actual_size;
0896b752 2597
43a145a3 2598 skbstat = alloc_skb(len, GFP_ATOMIC);
7b8631b5 2599 if (!skbstat) {
322d739d
MC		 2600 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2601 "deliver stats: OOM\n");
7b8631b5
MC		 2602 return -ENOMEM;
2603 }
2604
43514774 2605 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
7b8631b5 2606 (len - sizeof(*nlhstat)), 0);
e07ebea0 2607 evstat = nlmsg_data(nlhstat);
7b8631b5
MC		 2608 memset(evstat, 0, sizeof(*evstat));
2609 evstat->transport_handle = iscsi_handle(conn->transport);
2610 evstat->type = nlh->nlmsg_type;
b5c7a12d
MC		 2611 evstat->u.get_stats.cid =
2612 ev->u.get_stats.cid;
2613 evstat->u.get_stats.sid =
2614 ev->u.get_stats.sid;
7b8631b5
MC		 2615 stats = (struct iscsi_stats *)
2616 ((char*)evstat + sizeof(*evstat));
2617 memset(stats, 0, sizeof(*stats));
2618
7b7232f3 2619 transport->get_stats(conn, stats);
e07ebea0
H		 2620 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2621 sizeof(struct iscsi_stats) +
2622 sizeof(struct iscsi_stats_custom) *
2623 stats->custom_length);
7b8631b5 2624 actual_size -= sizeof(*nlhstat);
e07ebea0 2625 actual_size = nlmsg_msg_size(actual_size);
5b940adf 2626 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
7b8631b5
MC		 2627 nlhstat->nlmsg_len = actual_size;
2628
43514774
MC		 2629 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2630 GFP_ATOMIC);
7b8631b5
MC		 2631 } while (err < 0 && err != -ECONNREFUSED);
2632
2633 return err;
0896b752
AA		 2634}
2635
53cb8a1f 2636/**
26974789
MC		 2637 * iscsi_session_event - send session destr. completion event
2638 * @session: iscsi class session
2639 * @event: type of event
eb44820c 2640 */
26974789
MC		 2641int iscsi_session_event(struct iscsi_cls_session *session,
2642 enum iscsi_uevent_e event)
53cb8a1f
MC		 2643{
2644 struct iscsi_internal *priv;
53cb8a1f
MC		 2645 struct Scsi_Host *shost;
2646 struct iscsi_uevent *ev;
2647 struct sk_buff *skb;
2648 struct nlmsghdr *nlh;
e07ebea0 2649 int rc, len = nlmsg_total_size(sizeof(*ev));
53cb8a1f 2650
26974789 2651 priv = iscsi_if_transport_lookup(session->transport);
53cb8a1f
MC		 2652 if (!priv)
2653 return -EINVAL;
53cb8a1f
MC		 2654 shost = iscsi_session_to_shost(session);
2655
43a145a3 2656 skb = alloc_skb(len, GFP_KERNEL);
53cb8a1f 2657 if (!skb) {
322d739d
MC		 2658 iscsi_cls_session_printk(KERN_ERR, session,
2659 "Cannot notify userspace of session "
2660 "event %u\n", event);
53cb8a1f
MC		 2661 return -ENOMEM;
2662 }
2663
43514774 2664 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
e07ebea0 2665 ev = nlmsg_data(nlh);
26974789 2666 ev->transport_handle = iscsi_handle(session->transport);
53cb8a1f 2667
26974789
MC		 2668 ev->type = event;
2669 switch (event) {
2670 case ISCSI_KEVENT_DESTROY_SESSION:
2671 ev->r.d_session.host_no = shost->host_no;
2672 ev->r.d_session.sid = session->sid;
2673 break;
2674 case ISCSI_KEVENT_CREATE_SESSION:
2675 ev->r.c_session_ret.host_no = shost->host_no;
2676 ev->r.c_session_ret.sid = session->sid;
2677 break;
2678 case ISCSI_KEVENT_UNBIND_SESSION:
2679 ev->r.unbind_session.host_no = shost->host_no;
2680 ev->r.unbind_session.sid = session->sid;
2681 break;
2682 default:
322d739d
MC		 2683 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2684 "%u.\n", event);
26974789 2685 kfree_skb(skb);
53cb8a1f 2686 return -EINVAL;
53cb8a1f
MC		 2687 }
2688
53cb8a1f
MC		 2689 /*
2690 * this will occur if the daemon is not up, so we just warn
2691 * the user and when the daemon is restarted it will handle it
2692 */
43514774 2693 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
ff491a73 2694 if (rc == -ESRCH)
322d739d
MC		 2695 iscsi_cls_session_printk(KERN_ERR, session,
2696 "Cannot notify userspace of session "
2697 "event %u. Check iscsi daemon\n",
2698 event);
632248aa
MC		 2699
2700 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2701 event, rc);
53cb8a1f
MC		 2702 return rc;
2703}
26974789 2704EXPORT_SYMBOL_GPL(iscsi_session_event);
53cb8a1f 2705
0896b752 2706static int
d82ff9be 2707iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
0c70d84b
MC		 2708 struct iscsi_uevent *ev, pid_t pid,
2709 uint32_t initial_cmdsn, uint16_t cmds_max,
2710 uint16_t queue_depth)
0896b752
AA		 2711{
2712 struct iscsi_transport *transport = priv->iscsi_transport;
7b7232f3 2713 struct iscsi_cls_session *session;
5e7facb7 2714 struct Scsi_Host *shost;
0896b752 2715
d82ff9be 2716 session = transport->create_session(ep, cmds_max, queue_depth,
5e7facb7 2717 initial_cmdsn);
7b7232f3 2718 if (!session)
7b8631b5 2719 return -ENOMEM;
0896b752 2720
0c70d84b 2721 session->creator = pid;
5e7facb7
MC		 2722 shost = iscsi_session_to_shost(session);
2723 ev->r.c_session_ret.host_no = shost->host_no;
b5c7a12d 2724 ev->r.c_session_ret.sid = session->sid;
632248aa
MC		 2725 ISCSI_DBG_TRANS_SESSION(session,
2726 "Completed creating transport session\n");
0896b752 2727 return 0;
0896b752
AA		 2728}
2729
2730static int
7b7232f3 2731iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
0896b752 2732{
7b8631b5 2733 struct iscsi_cls_conn *conn;
7b7232f3 2734 struct iscsi_cls_session *session;
7b8631b5 2735
b5c7a12d
MC		 2736 session = iscsi_session_lookup(ev->u.c_conn.sid);
2737 if (!session) {
322d739d 2738 printk(KERN_ERR "iscsi: invalid session %d.\n",
b5c7a12d 2739 ev->u.c_conn.sid);
7b8631b5 2740 return -EINVAL;
b5c7a12d 2741 }
0896b752 2742
7b7232f3 2743 conn = transport->create_conn(session, ev->u.c_conn.cid);
b5c7a12d 2744 if (!conn) {
322d739d
MC		 2745 iscsi_cls_session_printk(KERN_ERR, session,
2746 "couldn't create a new connection.");
7b7232f3 2747 return -ENOMEM;
b5c7a12d 2748 }
0896b752 2749
b5c7a12d
MC		 2750 ev->r.c_conn_ret.sid = session->sid;
2751 ev->r.c_conn_ret.cid = conn->cid;
632248aa
MC		 2752
2753 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
0896b752 2754 return 0;
1da177e4
LT		 2755}
2756
0896b752
AA		 2757static int
2758iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2759{
7b8631b5 2760 struct iscsi_cls_conn *conn;
0896b752 2761
b5c7a12d 2762 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
0896b752 2763 if (!conn)
7b8631b5 2764 return -EINVAL;
0896b752 2765
632248aa 2766 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
7b8631b5
MC		 2767 if (transport->destroy_conn)
2768 transport->destroy_conn(conn);
632248aa 2769
7b8631b5 2770 return 0;
0896b752
AA		 2771}
2772
fd7255f5
MC		 2773static int
2774iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2775{
2776 char *data = (char*)ev + sizeof(*ev);
2777 struct iscsi_cls_conn *conn;
2778 struct iscsi_cls_session *session;
a54a52ca 2779 int err = 0, value = 0;
fd7255f5
MC		 2780
2781 session = iscsi_session_lookup(ev->u.set_param.sid);
2782 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2783 if (!conn || !session)
2784 return -EINVAL;
2785
2786 switch (ev->u.set_param.param) {
30a6c652 2787 case ISCSI_PARAM_SESS_RECOVERY_TMO:
a54a52ca 2788 sscanf(data, "%d", &value);
fdd46dcb 2789 session->recovery_tmo = value;
30a6c652 2790 break;
fd7255f5 2791 default:
a54a52ca
MC		 2792 err = transport->set_param(conn, ev->u.set_param.param,
2793 data, ev->u.set_param.len);
fd7255f5
MC		 2794 }
2795
2796 return err;
2797}
2798
10eb0f01
MC		 2799static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2800 struct iscsi_uevent *ev, int msg_type)
2801{
2802 struct iscsi_endpoint *ep;
2803 struct sockaddr *dst_addr;
2804 struct Scsi_Host *shost = NULL;
2805 int non_blocking, err = 0;
2806
2807 if (!transport->ep_connect)
2808 return -EINVAL;
2809
2810 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2811 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2812 if (!shost) {
2813 printk(KERN_ERR "ep connect failed. Could not find "
2814 "host no %u\n",
2815 ev->u.ep_connect_through_host.host_no);
2816 return -ENODEV;
2817 }
2818 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2819 } else
2820 non_blocking = ev->u.ep_connect.non_blocking;
2821
2822 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2823 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2824 if (IS_ERR(ep)) {
2825 err = PTR_ERR(ep);
2826 goto release_host;
2827 }
2828
2829 ev->r.ep_connect_ret.handle = ep->id;
2830release_host:
2831 if (shost)
2832 scsi_host_put(shost);
2833 return err;
2834}
2835
22a39fbb
MC		 2836static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2837 u64 ep_handle)
2838{
2839 struct iscsi_cls_conn *conn;
2840 struct iscsi_endpoint *ep;
2841
2842 if (!transport->ep_disconnect)
2843 return -EINVAL;
2844
2845 ep = iscsi_lookup_endpoint(ep_handle);
2846 if (!ep)
2847 return -EINVAL;
2848 conn = ep->conn;
2849 if (conn) {
2850 mutex_lock(&conn->ep_mutex);
2851 conn->ep = NULL;
2852 mutex_unlock(&conn->ep_mutex);
2853 }
2854
2855 transport->ep_disconnect(ep);
2856 return 0;
2857}
2858
264faaaa
OG		 2859static int
2860iscsi_if_transport_ep(struct iscsi_transport *transport,
2861 struct iscsi_uevent *ev, int msg_type)
2862{
d82ff9be 2863 struct iscsi_endpoint *ep;
264faaaa
OG		 2864 int rc = 0;
2865
2866 switch (msg_type) {
10eb0f01 2867 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
264faaaa 2868 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
10eb0f01 2869 rc = iscsi_if_ep_connect(transport, ev, msg_type);
264faaaa
OG		 2870 break;
2871 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2872 if (!transport->ep_poll)
2873 return -EINVAL;
2874
d82ff9be
MC		 2875 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2876 if (!ep)
2877 return -EINVAL;
2878
2879 ev->r.retcode = transport->ep_poll(ep,
264faaaa
OG		 2880 ev->u.ep_poll.timeout_ms);
2881 break;
2882 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
22a39fbb
MC		 2883 rc = iscsi_if_ep_disconnect(transport,
2884 ev->u.ep_disconnect.ep_handle);
264faaaa
OG		 2885 break;
2886 }
2887 return rc;
2888}
2889
01cb225d
MC		 2890static int
2891iscsi_tgt_dscvr(struct iscsi_transport *transport,
2892 struct iscsi_uevent *ev)
2893{
2174a04e 2894 struct Scsi_Host *shost;
01cb225d 2895 struct sockaddr *dst_addr;
2174a04e 2896 int err;
01cb225d
MC		 2897
2898 if (!transport->tgt_dscvr)
2899 return -EINVAL;
2900
2174a04e 2901 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
315cb0ad 2902 if (!shost) {
2174a04e
MC		 2903 printk(KERN_ERR "target discovery could not find host no %u\n",
2904 ev->u.tgt_dscvr.host_no);
2905 return -ENODEV;
2906 }
2907
2908
01cb225d 2909 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2174a04e
MC		 2910 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2911 ev->u.tgt_dscvr.enable, dst_addr);
2912 scsi_host_put(shost);
2913 return err;
01cb225d
MC		 2914}
2915
1d9bf13a
MC		 2916static int
2917iscsi_set_host_param(struct iscsi_transport *transport,
2918 struct iscsi_uevent *ev)
2919{
2920 char *data = (char*)ev + sizeof(*ev);
2921 struct Scsi_Host *shost;
2922 int err;
2923
2924 if (!transport->set_host_param)
2925 return -ENOSYS;
2926
2927 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
315cb0ad 2928 if (!shost) {
1d9bf13a
MC		 2929 printk(KERN_ERR "set_host_param could not find host no %u\n",
2930 ev->u.set_host_param.host_no);
2931 return -ENODEV;
2932 }
2933
2934 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2935 data, ev->u.set_host_param.len);
2936 scsi_host_put(shost);
2937 return err;
2938}
2939
0896b752 2940static int
43514774
MC		 2941iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2942{
2943 struct Scsi_Host *shost;
2944 struct iscsi_path *params;
2945 int err;
2946
2947 if (!transport->set_path)
2948 return -ENOSYS;
2949
2950 shost = scsi_host_lookup(ev->u.set_path.host_no);
2951 if (!shost) {
2952 printk(KERN_ERR "set path could not find host no %u\n",
2953 ev->u.set_path.host_no);
2954 return -ENODEV;
2955 }
2956
2957 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2958 err = transport->set_path(shost, params);
2959
2960 scsi_host_put(shost);
2961 return err;
2962}
2963
56c155b5
MC		 2964static int
2965iscsi_set_iface_params(struct iscsi_transport *transport,
00c31889 2966 struct iscsi_uevent *ev, uint32_t len)
56c155b5
MC		 2967{
2968 char *data = (char *)ev + sizeof(*ev);
2969 struct Scsi_Host *shost;
2970 int err;
2971
2972 if (!transport->set_iface_param)
2973 return -ENOSYS;
2974
2975 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2976 if (!shost) {
2977 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2978 ev->u.set_iface_params.host_no);
2979 return -ENODEV;
2980 }
2981
00c31889 2982 err = transport->set_iface_param(shost, data, len);
56c155b5
MC		 2983 scsi_host_put(shost);
2984 return err;
2985}
2986
ac20c7bf
VC		 2987static int
2988iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2989{
2990 struct Scsi_Host *shost;
2991 struct sockaddr *dst_addr;
2992 int err;
2993
2994 if (!transport->send_ping)
2995 return -ENOSYS;
2996
2997 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
2998 if (!shost) {
2999 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3000 ev->u.iscsi_ping.host_no);
3001 return -ENODEV;
3002 }
3003
3004 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3005 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3006 ev->u.iscsi_ping.iface_type,
3007 ev->u.iscsi_ping.payload_size,
3008 ev->u.iscsi_ping.pid,
3009 dst_addr);
3010 scsi_host_put(shost);
3011 return err;
3012}
3013
6260a5d2
NJ		 3014static int
3015iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3016{
e07ebea0 3017 struct iscsi_uevent *ev = nlmsg_data(nlh);
6260a5d2
NJ		 3018 struct Scsi_Host *shost = NULL;
3019 struct iscsi_chap_rec *chap_rec;
3020 struct iscsi_internal *priv;
3021 struct sk_buff *skbchap;
3022 struct nlmsghdr *nlhchap;
3023 struct iscsi_uevent *evchap;
3024 uint32_t chap_buf_size;
3025 int len, err = 0;
3026 char *buf;
3027
3028 if (!transport->get_chap)
3029 return -EINVAL;
3030
3031 priv = iscsi_if_transport_lookup(transport);
3032 if (!priv)
3033 return -EINVAL;
3034
3035 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
e07ebea0 3036 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
6260a5d2
NJ		 3037
3038 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3039 if (!shost) {
3040 printk(KERN_ERR "%s: failed. Cound not find host no %u\n",
3041 __func__, ev->u.get_chap.host_no);
3042 return -ENODEV;
3043 }
3044
3045 do {
3046 int actual_size;
3047
3048 skbchap = alloc_skb(len, GFP_KERNEL);
3049 if (!skbchap) {
3050 printk(KERN_ERR "can not deliver chap: OOM\n");
3051 err = -ENOMEM;
3052 goto exit_get_chap;
3053 }
3054
3055 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3056 (len - sizeof(*nlhchap)), 0);
e07ebea0 3057 evchap = nlmsg_data(nlhchap);
6260a5d2
NJ		 3058 memset(evchap, 0, sizeof(*evchap));
3059 evchap->transport_handle = iscsi_handle(transport);
3060 evchap->type = nlh->nlmsg_type;
3061 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3062 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3063 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
a799cb77 3064 buf = (char *)evchap + sizeof(*evchap);
6260a5d2
NJ		 3065 memset(buf, 0, chap_buf_size);
3066
3067 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3068 &evchap->u.get_chap.num_entries, buf);
3069
e07ebea0 3070 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
6260a5d2
NJ		 3071 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3072 nlhchap->nlmsg_len = actual_size;
3073
3074 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3075 GFP_KERNEL);
3076 } while (err < 0 && err != -ECONNREFUSED);
3077
3078exit_get_chap:
3079 scsi_host_put(shost);
3080 return err;
3081}
3082
3af142fe
AC		 3083static int iscsi_set_chap(struct iscsi_transport *transport,
3084 struct iscsi_uevent *ev, uint32_t len)
3085{
3086 char *data = (char *)ev + sizeof(*ev);
3087 struct Scsi_Host *shost;
3088 int err = 0;
3089
3090 if (!transport->set_chap)
3091 return -ENOSYS;
3092
3093 shost = scsi_host_lookup(ev->u.set_path.host_no);
3094 if (!shost) {
3095 pr_err("%s could not find host no %u\n",
3096 __func__, ev->u.set_path.host_no);
3097 return -ENODEV;
3098 }
3099
3100 err = transport->set_chap(shost, data, len);
3101 scsi_host_put(shost);
3102 return err;
3103}
3104
6260a5d2
NJ		 3105static int iscsi_delete_chap(struct iscsi_transport *transport,
3106 struct iscsi_uevent *ev)
3107{
3108 struct Scsi_Host *shost;
3109 int err = 0;
3110
3111 if (!transport->delete_chap)
3112 return -ENOSYS;
3113
3114 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3115 if (!shost) {
3116 printk(KERN_ERR "%s could not find host no %u\n",
3117 __func__, ev->u.delete_chap.host_no);
3118 return -ENODEV;
3119 }
3120
3121 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3122 scsi_host_put(shost);
3123 return err;
3124}
3125
c6a4bb2e
AC		 3126static const struct {
3127 enum iscsi_discovery_parent_type value;
3128 char *name;
3129} iscsi_discovery_parent_names[] = {
3130 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3131 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3132 {ISCSI_DISC_PARENT_ISNS, "isns" },
3133};
3134
3135char *iscsi_get_discovery_parent_name(int parent_type)
3136{
3137 int i;
3138 char *state = "Unknown!";
3139
3140 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3141 if (iscsi_discovery_parent_names[i].value & parent_type) {
3142 state = iscsi_discovery_parent_names[i].name;
3143 break;
3144 }
3145 }
3146 return state;
3147}
3148EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3149
3150static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3151 struct iscsi_uevent *ev, uint32_t len)
3152{
3153 char *data = (char *)ev + sizeof(*ev);
3154 struct Scsi_Host *shost;
3155 struct iscsi_bus_flash_session *fnode_sess;
3156 struct iscsi_bus_flash_conn *fnode_conn;
3157 struct device *dev;
8526cb11 3158 uint32_t idx;
c6a4bb2e
AC		 3159 int err = 0;
3160
3161 if (!transport->set_flashnode_param) {
3162 err = -ENOSYS;
3163 goto exit_set_fnode;
3164 }
3165
3166 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3167 if (!shost) {
3168 pr_err("%s could not find host no %u\n",
3169 __func__, ev->u.set_flashnode.host_no);
3170 err = -ENODEV;
3171 goto put_host;
3172 }
3173
8526cb11
MC		 3174 idx = ev->u.set_flashnode.flashnode_idx;
3175 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
c6a4bb2e
AC		 3176 if (!fnode_sess) {
3177 pr_err("%s could not find flashnode %u for host no %u\n",
8526cb11 3178 __func__, idx, ev->u.set_flashnode.host_no);
c6a4bb2e
AC		 3179 err = -ENODEV;
3180 goto put_host;
3181 }
3182
8526cb11 3183 dev = iscsi_find_flashnode_conn(fnode_sess);
c6a4bb2e
AC		 3184 if (!dev) {
3185 err = -ENODEV;
8526cb11 3186 goto put_sess;
c6a4bb2e
AC		 3187 }
3188
3189 fnode_conn = iscsi_dev_to_flash_conn(dev);
3190 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
8526cb11
MC		 3191 put_device(dev);
3192
3193put_sess:
3194 put_device(&fnode_sess->dev);
c6a4bb2e
AC		 3195
3196put_host:
3197 scsi_host_put(shost);
3198
3199exit_set_fnode:
3200 return err;
3201}
3202
3203static int iscsi_new_flashnode(struct iscsi_transport *transport,
3204 struct iscsi_uevent *ev, uint32_t len)
3205{
3206 char *data = (char *)ev + sizeof(*ev);
3207 struct Scsi_Host *shost;
3208 int index;
3209 int err = 0;
3210
3211 if (!transport->new_flashnode) {
3212 err = -ENOSYS;
3213 goto exit_new_fnode;
3214 }
3215
3216 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3217 if (!shost) {
3218 pr_err("%s could not find host no %u\n",
3219 __func__, ev->u.new_flashnode.host_no);
3220 err = -ENODEV;
3221 goto put_host;
3222 }
3223
3224 index = transport->new_flashnode(shost, data, len);
3225
3226 if (index >= 0)
3227 ev->r.new_flashnode_ret.flashnode_idx = index;
3228 else
3229 err = -EIO;
3230
3231put_host:
3232 scsi_host_put(shost);
3233
3234exit_new_fnode:
3235 return err;
3236}
3237
3238static int iscsi_del_flashnode(struct iscsi_transport *transport,
3239 struct iscsi_uevent *ev)
3240{
3241 struct Scsi_Host *shost;
3242 struct iscsi_bus_flash_session *fnode_sess;
8526cb11 3243 uint32_t idx;
c6a4bb2e
AC		 3244 int err = 0;
3245
3246 if (!transport->del_flashnode) {
3247 err = -ENOSYS;
3248 goto exit_del_fnode;
3249 }
3250
3251 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3252 if (!shost) {
3253 pr_err("%s could not find host no %u\n",
3254 __func__, ev->u.del_flashnode.host_no);
3255 err = -ENODEV;
3256 goto put_host;
3257 }
3258
8526cb11
MC		 3259 idx = ev->u.del_flashnode.flashnode_idx;
3260 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
c6a4bb2e
AC		 3261 if (!fnode_sess) {
3262 pr_err("%s could not find flashnode %u for host no %u\n",
8526cb11 3263 __func__, idx, ev->u.del_flashnode.host_no);
c6a4bb2e
AC		 3264 err = -ENODEV;
3265 goto put_host;
3266 }
3267
3268 err = transport->del_flashnode(fnode_sess);
8526cb11 3269 put_device(&fnode_sess->dev);
c6a4bb2e
AC		 3270
3271put_host:
3272 scsi_host_put(shost);
3273
3274exit_del_fnode:
3275 return err;
3276}
3277
3278static int iscsi_login_flashnode(struct iscsi_transport *transport,
3279 struct iscsi_uevent *ev)
3280{
3281 struct Scsi_Host *shost;
3282 struct iscsi_bus_flash_session *fnode_sess;
3283 struct iscsi_bus_flash_conn *fnode_conn;
3284 struct device *dev;
8526cb11 3285 uint32_t idx;
c6a4bb2e
AC		 3286 int err = 0;
3287
3288 if (!transport->login_flashnode) {
3289 err = -ENOSYS;
3290 goto exit_login_fnode;
3291 }
3292
3293 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3294 if (!shost) {
3295 pr_err("%s could not find host no %u\n",
3296 __func__, ev->u.login_flashnode.host_no);
3297 err = -ENODEV;
3298 goto put_host;
3299 }
3300
8526cb11
MC		 3301 idx = ev->u.login_flashnode.flashnode_idx;
3302 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
c6a4bb2e
AC		 3303 if (!fnode_sess) {
3304 pr_err("%s could not find flashnode %u for host no %u\n",
8526cb11 3305 __func__, idx, ev->u.login_flashnode.host_no);
c6a4bb2e
AC		 3306 err = -ENODEV;
3307 goto put_host;
3308 }
3309
8526cb11 3310 dev = iscsi_find_flashnode_conn(fnode_sess);
c6a4bb2e
AC		 3311 if (!dev) {
3312 err = -ENODEV;
8526cb11 3313 goto put_sess;
c6a4bb2e
AC		 3314 }
3315
3316 fnode_conn = iscsi_dev_to_flash_conn(dev);
3317 err = transport->login_flashnode(fnode_sess, fnode_conn);
8526cb11
MC		 3318 put_device(dev);
3319
3320put_sess:
3321 put_device(&fnode_sess->dev);
c6a4bb2e
AC		 3322
3323put_host:
3324 scsi_host_put(shost);
3325
3326exit_login_fnode:
3327 return err;
3328}
3329
3330static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3331 struct iscsi_uevent *ev)
3332{
3333 struct Scsi_Host *shost;
3334 struct iscsi_bus_flash_session *fnode_sess;
3335 struct iscsi_bus_flash_conn *fnode_conn;
3336 struct device *dev;
8526cb11 3337 uint32_t idx;
c6a4bb2e
AC		 3338 int err = 0;
3339
3340 if (!transport->logout_flashnode) {
3341 err = -ENOSYS;
3342 goto exit_logout_fnode;
3343 }
3344
3345 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3346 if (!shost) {
3347 pr_err("%s could not find host no %u\n",
3348 __func__, ev->u.logout_flashnode.host_no);
3349 err = -ENODEV;
3350 goto put_host;
3351 }
3352
8526cb11
MC		 3353 idx = ev->u.logout_flashnode.flashnode_idx;
3354 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
c6a4bb2e
AC		 3355 if (!fnode_sess) {
3356 pr_err("%s could not find flashnode %u for host no %u\n",
8526cb11 3357 __func__, idx, ev->u.logout_flashnode.host_no);
c6a4bb2e
AC		 3358 err = -ENODEV;
3359 goto put_host;
3360 }
3361
8526cb11 3362 dev = iscsi_find_flashnode_conn(fnode_sess);
c6a4bb2e
AC		 3363 if (!dev) {
3364 err = -ENODEV;
8526cb11 3365 goto put_sess;
c6a4bb2e
AC		 3366 }
3367
3368 fnode_conn = iscsi_dev_to_flash_conn(dev);
3369
3370 err = transport->logout_flashnode(fnode_sess, fnode_conn);
8526cb11
MC		 3371 put_device(dev);
3372
3373put_sess:
3374 put_device(&fnode_sess->dev);
c6a4bb2e
AC		 3375
3376put_host:
3377 scsi_host_put(shost);
3378
3379exit_logout_fnode:
3380 return err;
3381}
3382
3383static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3384 struct iscsi_uevent *ev)
3385{
3386 struct Scsi_Host *shost;
3387 struct iscsi_cls_session *session;
3388 int err = 0;
3389
3390 if (!transport->logout_flashnode_sid) {
3391 err = -ENOSYS;
3392 goto exit_logout_sid;
3393 }
3394
3395 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3396 if (!shost) {
3397 pr_err("%s could not find host no %u\n",
3398 __func__, ev->u.logout_flashnode.host_no);
3399 err = -ENODEV;
3400 goto put_host;
3401 }
3402
3403 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3404 if (!session) {
3405 pr_err("%s could not find session id %u\n",
3406 __func__, ev->u.logout_flashnode_sid.sid);
3407 err = -EINVAL;
3408 goto put_host;
3409 }
3410
3411 err = transport->logout_flashnode_sid(session);
3412
3413put_host:
3414 scsi_host_put(shost);
3415
3416exit_logout_sid:
3417 return err;
3418}
3419
6fa7c554
LC		 3420static int
3421iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3422{
3423 struct iscsi_uevent *ev = nlmsg_data(nlh);
3424 struct Scsi_Host *shost = NULL;
3425 struct iscsi_internal *priv;
3426 struct sk_buff *skbhost_stats;
3427 struct nlmsghdr *nlhhost_stats;
3428 struct iscsi_uevent *evhost_stats;
3429 int host_stats_size = 0;
3430 int len, err = 0;
3431 char *buf;
3432
3433 if (!transport->get_host_stats)
719e5874 3434 return -ENOSYS;
6fa7c554
LC		 3435
3436 priv = iscsi_if_transport_lookup(transport);
3437 if (!priv)
3438 return -EINVAL;
3439
3440 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3441 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3442
3443 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3444 if (!shost) {
3445 pr_err("%s: failed. Cound not find host no %u\n",
3446 __func__, ev->u.get_host_stats.host_no);
3447 return -ENODEV;
3448 }
3449
3450 do {
3451 int actual_size;
3452
3453 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3454 if (!skbhost_stats) {
3455 pr_err("cannot deliver host stats: OOM\n");
3456 err = -ENOMEM;
3457 goto exit_host_stats;
3458 }
3459
3460 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3461 (len - sizeof(*nlhhost_stats)), 0);
3462 evhost_stats = nlmsg_data(nlhhost_stats);
3463 memset(evhost_stats, 0, sizeof(*evhost_stats));
3464 evhost_stats->transport_handle = iscsi_handle(transport);
3465 evhost_stats->type = nlh->nlmsg_type;
3466 evhost_stats->u.get_host_stats.host_no =
3467 ev->u.get_host_stats.host_no;
a799cb77 3468 buf = (char *)evhost_stats + sizeof(*evhost_stats);
6fa7c554
LC		 3469 memset(buf, 0, host_stats_size);
3470
3471 err = transport->get_host_stats(shost, buf, host_stats_size);
2f7608fc 3472 if (err) {
bfb50879 3473 kfree_skb(skbhost_stats);
2f7608fc
MC		 3474 goto exit_host_stats;
3475 }
6fa7c554
LC		 3476
3477 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3478 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3479 nlhhost_stats->nlmsg_len = actual_size;
3480
3481 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3482 GFP_KERNEL);
3483 } while (err < 0 && err != -ECONNREFUSED);
3484
3485exit_host_stats:
3486 scsi_host_put(shost);
3487 return err;
3488}
3489
3490
43514774
MC		 3491static int
3492iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
0896b752
AA		 3493{
3494 int err = 0;
e07ebea0 3495 struct iscsi_uevent *ev = nlmsg_data(nlh);
0896b752
AA		 3496 struct iscsi_transport *transport = NULL;
3497 struct iscsi_internal *priv;
7b7232f3
MC		 3498 struct iscsi_cls_session *session;
3499 struct iscsi_cls_conn *conn;
d82ff9be 3500 struct iscsi_endpoint *ep = NULL;
0896b752 3501
43514774
MC		 3502 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3503 *group = ISCSI_NL_GRP_UIP;
3504 else
3505 *group = ISCSI_NL_GRP_ISCSID;
3506
0896b752
AA		 3507 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3508 if (!priv)
3509 return -EINVAL;
3510 transport = priv->iscsi_transport;
3511
7b7232f3
MC		 3512 if (!try_module_get(transport->owner))
3513 return -EINVAL;
3514
0896b752
AA		 3515 switch (nlh->nlmsg_type) {
3516 case ISCSI_UEVENT_CREATE_SESSION:
d82ff9be 3517 err = iscsi_if_create_session(priv, ep, ev,
15e47304 3518 NETLINK_CB(skb).portid,
40753caa
MC		 3519 ev->u.c_session.initial_cmdsn,
3520 ev->u.c_session.cmds_max,
3521 ev->u.c_session.queue_depth);
3522 break;
3523 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
d82ff9be 3524 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
c95fddc7
MC		 3525 if (!ep) {
3526 err = -EINVAL;
3527 break;
3528 }
d82ff9be
MC		 3529
3530 err = iscsi_if_create_session(priv, ep, ev,
15e47304 3531 NETLINK_CB(skb).portid,
40753caa
MC		 3532 ev->u.c_bound_session.initial_cmdsn,
3533 ev->u.c_bound_session.cmds_max,
3534 ev->u.c_bound_session.queue_depth);
0896b752
AA		 3535 break;
3536 case ISCSI_UEVENT_DESTROY_SESSION:
b5c7a12d 3537 session = iscsi_session_lookup(ev->u.d_session.sid);
26974789 3538 if (session)
7b7232f3 3539 transport->destroy_session(session);
26974789
MC		 3540 else
3541 err = -EINVAL;
3542 break;
3543 case ISCSI_UEVENT_UNBIND_SESSION:
3544 session = iscsi_session_lookup(ev->u.d_session.sid);
3545 if (session)
06d25af4
MC		 3546 scsi_queue_work(iscsi_session_to_shost(session),
3547 &session->unbind_work);
26974789 3548 else
7b7232f3 3549 err = -EINVAL;
0896b752
AA		 3550 break;
3551 case ISCSI_UEVENT_CREATE_CONN:
3552 err = iscsi_if_create_conn(transport, ev);
3553 break;
3554 case ISCSI_UEVENT_DESTROY_CONN:
3555 err = iscsi_if_destroy_conn(transport, ev);
3556 break;
3557 case ISCSI_UEVENT_BIND_CONN:
b5c7a12d
MC		 3558 session = iscsi_session_lookup(ev->u.b_conn.sid);
3559 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
7b7232f3 3560
22a39fbb
MC		 3561 if (conn && conn->ep)
3562 iscsi_if_ep_disconnect(transport, conn->ep->id);
3563
3564 if (!session || !conn) {
7b7232f3 3565 err = -EINVAL;
22a39fbb
MC		 3566 break;
3567 }
3568
3569 ev->r.retcode = transport->bind_conn(session, conn,
3570 ev->u.b_conn.transport_eph,
3571 ev->u.b_conn.is_leading);
3572 if (ev->r.retcode || !transport->ep_connect)
3573 break;
3574
3575 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3576 if (ep) {
3577 ep->conn = conn;
3578
3579 mutex_lock(&conn->ep_mutex);
3580 conn->ep = ep;
3581 mutex_unlock(&conn->ep_mutex);
3582 } else
3583 iscsi_cls_conn_printk(KERN_ERR, conn,
3584 "Could not set ep conn "
3585 "binding\n");
0896b752
AA		 3586 break;
3587 case ISCSI_UEVENT_SET_PARAM:
fd7255f5 3588 err = iscsi_set_param(transport, ev);
0896b752
AA		 3589 break;
3590 case ISCSI_UEVENT_START_CONN:
b5c7a12d 3591 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
7b7232f3
MC		 3592 if (conn)
3593 ev->r.retcode = transport->start_conn(conn);
3594 else
3595 err = -EINVAL;
0896b752
AA		 3596 break;
3597 case ISCSI_UEVENT_STOP_CONN:
b5c7a12d 3598 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
7b7232f3
MC		 3599 if (conn)
3600 transport->stop_conn(conn, ev->u.stop_conn.flag);
3601 else
3602 err = -EINVAL;
0896b752
AA		 3603 break;
3604 case ISCSI_UEVENT_SEND_PDU:
b5c7a12d 3605 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
7b7232f3
MC		 3606 if (conn)
3607 ev->r.retcode = transport->send_pdu(conn,
3608 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3609 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3610 ev->u.send_pdu.data_size);
3611 else
3612 err = -EINVAL;
0896b752
AA		 3613 break;
3614 case ISCSI_UEVENT_GET_STATS:
5b940adf 3615 err = iscsi_if_get_stats(transport, nlh);
0896b752 3616 break;
264faaaa
OG		 3617 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3618 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3619 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
10eb0f01 3620 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
264faaaa
OG		 3621 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3622 break;
01cb225d
MC		 3623 case ISCSI_UEVENT_TGT_DSCVR:
3624 err = iscsi_tgt_dscvr(transport, ev);
3625 break;
1d9bf13a
MC		 3626 case ISCSI_UEVENT_SET_HOST_PARAM:
3627 err = iscsi_set_host_param(transport, ev);
3628 break;
43514774
MC		 3629 case ISCSI_UEVENT_PATH_UPDATE:
3630 err = iscsi_set_path(transport, ev);
3631 break;
56c155b5 3632 case ISCSI_UEVENT_SET_IFACE_PARAMS:
00c31889
MC		 3633 err = iscsi_set_iface_params(transport, ev,
3634 nlmsg_attrlen(nlh, sizeof(*ev)));
56c155b5 3635 break;
ac20c7bf
VC		 3636 case ISCSI_UEVENT_PING:
3637 err = iscsi_send_ping(transport, ev);
3638 break;
6260a5d2
NJ		 3639 case ISCSI_UEVENT_GET_CHAP:
3640 err = iscsi_get_chap(transport, nlh);
3641 break;
3642 case ISCSI_UEVENT_DELETE_CHAP:
3643 err = iscsi_delete_chap(transport, ev);
3644 break;
c6a4bb2e
AC		 3645 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3646 err = iscsi_set_flashnode_param(transport, ev,
3647 nlmsg_attrlen(nlh,
3648 sizeof(*ev)));
3649 break;
3650 case ISCSI_UEVENT_NEW_FLASHNODE:
3651 err = iscsi_new_flashnode(transport, ev,
3652 nlmsg_attrlen(nlh, sizeof(*ev)));
3653 break;
3654 case ISCSI_UEVENT_DEL_FLASHNODE:
3655 err = iscsi_del_flashnode(transport, ev);
3656 break;
3657 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3658 err = iscsi_login_flashnode(transport, ev);
3659 break;
3660 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3661 err = iscsi_logout_flashnode(transport, ev);
3662 break;
3663 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3664 err = iscsi_logout_flashnode_sid(transport, ev);
3665 break;
3af142fe
AC		 3666 case ISCSI_UEVENT_SET_CHAP:
3667 err = iscsi_set_chap(transport, ev,
3668 nlmsg_attrlen(nlh, sizeof(*ev)));
3669 break;
6fa7c554
LC		 3670 case ISCSI_UEVENT_GET_HOST_STATS:
3671 err = iscsi_get_host_stats(transport, nlh);
3672 break;
0896b752 3673 default:
1d9bf13a 3674 err = -ENOSYS;
0896b752
AA		 3675 break;
3676 }
3677
7b7232f3 3678 module_put(transport->owner);
0896b752
AA		 3679 return err;
3680}
3681
b5c7a12d 3682/*
cd40b7d3
DL		 3683 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3684 * Malformed skbs with wrong lengths or invalid creds are not processed.
b5c7a12d 3685 */
0896b752 3686static void
cd40b7d3 3687iscsi_if_rx(struct sk_buff *skb)
0896b752 3688{
0b950672 3689 mutex_lock(&rx_queue_mutex);
e07ebea0 3690 while (skb->len >= NLMSG_HDRLEN) {
cd40b7d3
DL		 3691 int err;
3692 uint32_t rlen;
3693 struct nlmsghdr *nlh;
3694 struct iscsi_uevent *ev;
43514774 3695 uint32_t group;
cd40b7d3
DL		 3696
3697 nlh = nlmsg_hdr(skb);
3698 if (nlh->nlmsg_len < sizeof(*nlh) ||
3699 skb->len < nlh->nlmsg_len) {
3700 break;
ee7f8e40 3701 }
ee7f8e40 3702
e07ebea0 3703 ev = nlmsg_data(nlh);
cd40b7d3
DL		 3704 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3705 if (rlen > skb->len)
3706 rlen = skb->len;
0896b752 3707
43514774 3708 err = iscsi_if_recv_msg(skb, nlh, &group);
cd40b7d3
DL		 3709 if (err) {
3710 ev->type = ISCSI_KEVENT_IF_ERROR;
3711 ev->iferror = err;
0896b752 3712 }
cd40b7d3
DL		 3713 do {
3714 /*
3715 * special case for GET_STATS:
3716 * on success - sending reply and stats from
3717 * inside of if_recv_msg(),
3718 * on error - fall through.
3719 */
3720 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3721 break;
6260a5d2
NJ		 3722 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3723 break;
43514774 3724 err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
cd40b7d3 3725 nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
46a7c17d 3726 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
cd40b7d3 3727 skb_pull(skb, rlen);
0896b752 3728 }
0b950672 3729 mutex_unlock(&rx_queue_mutex);
0896b752 3730}
1da177e4 3731
fd7255f5 3732#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
ee959b00 3733struct device_attribute dev_attr_##_prefix##_##_name = \
fd7255f5
MC		 3734 __ATTR(_name,_mode,_show,_store)
3735
1da177e4 3736/*
0896b752 3737 * iSCSI connection attrs
1da177e4 3738 */
a54a52ca 3739#define iscsi_conn_attr_show(param) \
0896b752 3740static ssize_t \
ee959b00
TJ		 3741show_conn_param_##param(struct device *dev, \
3742 struct device_attribute *attr, char *buf) \
0896b752 3743{ \
ee959b00 3744 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
7b8631b5 3745 struct iscsi_transport *t = conn->transport; \
a54a52ca 3746 return t->get_conn_param(conn, param, buf); \
0896b752
AA		 3747}
3748
a54a52ca
MC		 3749#define iscsi_conn_attr(field, param) \
3750 iscsi_conn_attr_show(param) \
3751static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
fd7255f5 3752 NULL);
0896b752 3753
a54a52ca
MC		 3754iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3755iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3756iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3757iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3758iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3759iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3760iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
a54a52ca
MC		 3761iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3762iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
f6d5180c
MC		 3763iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3764iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
ae542edb
AC		 3765iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3766iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3767iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3768iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3769iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3770iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3771iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3772iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3773iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3774iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3775iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3776iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3777iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3778iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3779iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3780iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
5af62f24 3781iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
ae542edb 3782
1da177e4 3783
289324b0
MC		 3784#define iscsi_conn_ep_attr_show(param) \
3785static ssize_t show_conn_ep_param_##param(struct device *dev, \
3786 struct device_attribute *attr,\
3787 char *buf) \
3788{ \
3789 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3790 struct iscsi_transport *t = conn->transport; \
3791 struct iscsi_endpoint *ep; \
3792 ssize_t rc; \
3793 \
3794 /* \
3795 * Need to make sure ep_disconnect does not free the LLD's \
3796 * interconnect resources while we are trying to read them. \
3797 */ \
3798 mutex_lock(&conn->ep_mutex); \
3799 ep = conn->ep; \
3800 if (!ep && t->ep_connect) { \
3801 mutex_unlock(&conn->ep_mutex); \
3802 return -ENOTCONN; \
3803 } \
3804 \
3805 if (ep) \
3806 rc = t->get_ep_param(ep, param, buf); \
3807 else \
3808 rc = t->get_conn_param(conn, param, buf); \
3809 mutex_unlock(&conn->ep_mutex); \
3810 return rc; \
3811}
3812
3813#define iscsi_conn_ep_attr(field, param) \
3814 iscsi_conn_ep_attr_show(param) \
3815static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3816 show_conn_ep_param_##param, NULL);
3817
3818iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3819iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3820
3128c6c7
MC		 3821static struct attribute *iscsi_conn_attrs[] = {
3822 &dev_attr_conn_max_recv_dlength.attr,
3823 &dev_attr_conn_max_xmit_dlength.attr,
3824 &dev_attr_conn_header_digest.attr,
3825 &dev_attr_conn_data_digest.attr,
3826 &dev_attr_conn_ifmarker.attr,
3827 &dev_attr_conn_ofmarker.attr,
3828 &dev_attr_conn_address.attr,
3829 &dev_attr_conn_port.attr,
3830 &dev_attr_conn_exp_statsn.attr,
3831 &dev_attr_conn_persistent_address.attr,
3832 &dev_attr_conn_persistent_port.attr,
3833 &dev_attr_conn_ping_tmo.attr,
3834 &dev_attr_conn_recv_tmo.attr,
ae542edb
AC		 3835 &dev_attr_conn_local_port.attr,
3836 &dev_attr_conn_statsn.attr,
3837 &dev_attr_conn_keepalive_tmo.attr,
3838 &dev_attr_conn_max_segment_size.attr,
3839 &dev_attr_conn_tcp_timestamp_stat.attr,
3840 &dev_attr_conn_tcp_wsf_disable.attr,
3841 &dev_attr_conn_tcp_nagle_disable.attr,
3842 &dev_attr_conn_tcp_timer_scale.attr,
3843 &dev_attr_conn_tcp_timestamp_enable.attr,
3844 &dev_attr_conn_fragment_disable.attr,
3845 &dev_attr_conn_ipv4_tos.attr,
3846 &dev_attr_conn_ipv6_traffic_class.attr,
3847 &dev_attr_conn_ipv6_flow_label.attr,
3848 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3849 &dev_attr_conn_tcp_xmit_wsf.attr,
3850 &dev_attr_conn_tcp_recv_wsf.attr,
5af62f24 3851 &dev_attr_conn_local_ipaddr.attr,
3128c6c7
MC		 3852 NULL,
3853};
3854
587a1f16 3855static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3128c6c7
MC		 3856 struct attribute *attr, int i)
3857{
3858 struct device *cdev = container_of(kobj, struct device, kobj);
3859 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3860 struct iscsi_transport *t = conn->transport;
3861 int param;
3862
3863 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3864 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3865 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3866 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3867 else if (attr == &dev_attr_conn_header_digest.attr)
3868 param = ISCSI_PARAM_HDRDGST_EN;
3869 else if (attr == &dev_attr_conn_data_digest.attr)
3870 param = ISCSI_PARAM_DATADGST_EN;
3871 else if (attr == &dev_attr_conn_ifmarker.attr)
3872 param = ISCSI_PARAM_IFMARKER_EN;
3873 else if (attr == &dev_attr_conn_ofmarker.attr)
3874 param = ISCSI_PARAM_OFMARKER_EN;
3875 else if (attr == &dev_attr_conn_address.attr)
3876 param = ISCSI_PARAM_CONN_ADDRESS;
3877 else if (attr == &dev_attr_conn_port.attr)
3878 param = ISCSI_PARAM_CONN_PORT;
3879 else if (attr == &dev_attr_conn_exp_statsn.attr)
3880 param = ISCSI_PARAM_EXP_STATSN;
3881 else if (attr == &dev_attr_conn_persistent_address.attr)
3882 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3883 else if (attr == &dev_attr_conn_persistent_port.attr)
3884 param = ISCSI_PARAM_PERSISTENT_PORT;
3885 else if (attr == &dev_attr_conn_ping_tmo.attr)
3886 param = ISCSI_PARAM_PING_TMO;
3887 else if (attr == &dev_attr_conn_recv_tmo.attr)
3888 param = ISCSI_PARAM_RECV_TMO;
ae542edb
AC		 3889 else if (attr == &dev_attr_conn_local_port.attr)
3890 param = ISCSI_PARAM_LOCAL_PORT;
3891 else if (attr == &dev_attr_conn_statsn.attr)
3892 param = ISCSI_PARAM_STATSN;
3893 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3894 param = ISCSI_PARAM_KEEPALIVE_TMO;
3895 else if (attr == &dev_attr_conn_max_segment_size.attr)
3896 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3897 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3898 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3899 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3900 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3901 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3902 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3903 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3904 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3905 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3906 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3907 else if (attr == &dev_attr_conn_fragment_disable.attr)
3908 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3909 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3910 param = ISCSI_PARAM_IPV4_TOS;
3911 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3912 param = ISCSI_PARAM_IPV6_TC;
3913 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3914 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3915 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3916 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3917 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3918 param = ISCSI_PARAM_TCP_XMIT_WSF;
3919 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3920 param = ISCSI_PARAM_TCP_RECV_WSF;
5af62f24
AC		 3921 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3922 param = ISCSI_PARAM_LOCAL_IPADDR;
3128c6c7
MC		 3923 else {
3924 WARN_ONCE(1, "Invalid conn attr");
3925 return 0;
3926 }
3927
3928 return t->attr_is_visible(ISCSI_PARAM, param);
3929}
3930
3931static struct attribute_group iscsi_conn_group = {
3932 .attrs = iscsi_conn_attrs,
3933 .is_visible = iscsi_conn_attr_is_visible,
3934};
3935
1da177e4 3936/*
0896b752 3937 * iSCSI session attrs
1da177e4 3938 */
b2c64167 3939#define iscsi_session_attr_show(param, perm) \
fd7255f5 3940static ssize_t \
ee959b00
TJ		 3941show_session_param_##param(struct device *dev, \
3942 struct device_attribute *attr, char *buf) \
fd7255f5 3943{ \
ee959b00
TJ		 3944 struct iscsi_cls_session *session = \
3945 iscsi_dev_to_session(dev->parent); \
fd7255f5 3946 struct iscsi_transport *t = session->transport; \
b2c64167
MC		 3947 \
3948 if (perm && !capable(CAP_SYS_ADMIN)) \
3949 return -EACCES; \
a54a52ca 3950 return t->get_session_param(session, param, buf); \
fd7255f5
MC		 3951}
3952
b2c64167
MC		 3953#define iscsi_session_attr(field, param, perm) \
3954 iscsi_session_attr_show(param, perm) \
a54a52ca 3955static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
fd7255f5 3956 NULL);
b2c64167
MC		 3957iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3958iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3959iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3960iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3961iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3962iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3963iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3964iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3965iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3966iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3967iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3968iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3969iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3970iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
30534952
MC		 3971iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3972iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
4cd49ea1
MC		 3973iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3974iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3975iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3fe5ae8b 3976iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
88dfd340 3977iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3b2bef1f
VC		 3978iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3979iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3b9373e9
EW		 3980iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3981iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3982iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
ae542edb
AC		 3983iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3984iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3985iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3986iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3987iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3988iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3989iscsi_session_attr(discovery_auth_optional,
3990 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3991iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3992iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3993iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3994iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3995iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3996iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3997iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
1da177e4 3998
6eabafbe 3999static ssize_t
ee959b00
TJ		 4000show_priv_session_state(struct device *dev, struct device_attribute *attr,
4001 char *buf)
6eabafbe 4002{
ee959b00 4003 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
6eabafbe
MC		 4004 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4005}
4006static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4007 NULL);
0c70d84b
MC		 4008static ssize_t
4009show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4010 char *buf)
4011{
4012 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4013 return sprintf(buf, "%d\n", session->creator);
4014}
4015static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4016 NULL);
930a9f04
MR		 4017static ssize_t
4018show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4019 char *buf)
4020{
4021 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4022 return sprintf(buf, "%d\n", session->target_id);
4023}
4024static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4025 show_priv_session_target_id, NULL);
6eabafbe 4026
fd7255f5
MC		 4027#define iscsi_priv_session_attr_show(field, format) \
4028static ssize_t \
ee959b00
TJ		 4029show_priv_session_##field(struct device *dev, \
4030 struct device_attribute *attr, char *buf) \
fd7255f5 4031{ \
ee959b00
TJ		 4032 struct iscsi_cls_session *session = \
4033 iscsi_dev_to_session(dev->parent); \
fe4f0bde
VC		 4034 if (session->field == -1) \
4035 return sprintf(buf, "off\n"); \
fd7255f5
MC		 4036 return sprintf(buf, format"\n", session->field); \
4037}
4038
fe4f0bde
VC		 4039#define iscsi_priv_session_attr_store(field) \
4040static ssize_t \
4041store_priv_session_##field(struct device *dev, \
4042 struct device_attribute *attr, \
4043 const char *buf, size_t count) \
4044{ \
4045 int val; \
4046 char *cp; \
4047 struct iscsi_cls_session *session = \
4048 iscsi_dev_to_session(dev->parent); \
4049 if ((session->state == ISCSI_SESSION_FREE) || \
4050 (session->state == ISCSI_SESSION_FAILED)) \
4051 return -EBUSY; \
4052 if (strncmp(buf, "off", 3) == 0) \
4053 session->field = -1; \
4054 else { \
4055 val = simple_strtoul(buf, &cp, 0); \
4056 if (*cp != '\0' && *cp != '\n') \
4057 return -EINVAL; \
4058 session->field = val; \
4059 } \
4060 return count; \
4061}
4062
4063#define iscsi_priv_session_rw_attr(field, format) \
fd7255f5 4064 iscsi_priv_session_attr_show(field, format) \
fe4f0bde 4065 iscsi_priv_session_attr_store(field) \
523f3c80 4066static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
fe4f0bde
VC		 4067 show_priv_session_##field, \
4068 store_priv_session_##field)
4069iscsi_priv_session_rw_attr(recovery_tmo, "%d");
fd7255f5 4070
1d063c17
MC		 4071static struct attribute *iscsi_session_attrs[] = {
4072 &dev_attr_sess_initial_r2t.attr,
4073 &dev_attr_sess_max_outstanding_r2t.attr,
4074 &dev_attr_sess_immediate_data.attr,
4075 &dev_attr_sess_first_burst_len.attr,
4076 &dev_attr_sess_max_burst_len.attr,
4077 &dev_attr_sess_data_pdu_in_order.attr,
4078 &dev_attr_sess_data_seq_in_order.attr,
4079 &dev_attr_sess_erl.attr,
4080 &dev_attr_sess_targetname.attr,
4081 &dev_attr_sess_tpgt.attr,
4082 &dev_attr_sess_password.attr,
4083 &dev_attr_sess_password_in.attr,
4084 &dev_attr_sess_username.attr,
4085 &dev_attr_sess_username_in.attr,
4086 &dev_attr_sess_fast_abort.attr,
4087 &dev_attr_sess_abort_tmo.attr,
4088 &dev_attr_sess_lu_reset_tmo.attr,
4089 &dev_attr_sess_tgt_reset_tmo.attr,
4090 &dev_attr_sess_ifacename.attr,
4091 &dev_attr_sess_initiatorname.attr,
4092 &dev_attr_sess_targetalias.attr,
3b9373e9
EW		 4093 &dev_attr_sess_boot_root.attr,
4094 &dev_attr_sess_boot_nic.attr,
4095 &dev_attr_sess_boot_target.attr,
1d063c17
MC		 4096 &dev_attr_priv_sess_recovery_tmo.attr,
4097 &dev_attr_priv_sess_state.attr,
0c70d84b 4098 &dev_attr_priv_sess_creator.attr,
30534952
MC		 4099 &dev_attr_sess_chap_out_idx.attr,
4100 &dev_attr_sess_chap_in_idx.attr,
930a9f04 4101 &dev_attr_priv_sess_target_id.attr,
ae542edb
AC		 4102 &dev_attr_sess_auto_snd_tgt_disable.attr,
4103 &dev_attr_sess_discovery_session.attr,
4104 &dev_attr_sess_portal_type.attr,
4105 &dev_attr_sess_chap_auth.attr,
4106 &dev_attr_sess_discovery_logout.attr,
4107 &dev_attr_sess_bidi_chap.attr,
4108 &dev_attr_sess_discovery_auth_optional.attr,
4109 &dev_attr_sess_def_time2wait.attr,
4110 &dev_attr_sess_def_time2retain.attr,
4111 &dev_attr_sess_isid.attr,
4112 &dev_attr_sess_tsid.attr,
4113 &dev_attr_sess_def_taskmgmt_tmo.attr,
4114 &dev_attr_sess_discovery_parent_idx.attr,
4115 &dev_attr_sess_discovery_parent_type.attr,
1d063c17
MC		 4116 NULL,
4117};
4118
587a1f16 4119static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
1d063c17
MC		 4120 struct attribute *attr, int i)
4121{
4122 struct device *cdev = container_of(kobj, struct device, kobj);
4123 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4124 struct iscsi_transport *t = session->transport;
4125 int param;
4126
4127 if (attr == &dev_attr_sess_initial_r2t.attr)
4128 param = ISCSI_PARAM_INITIAL_R2T_EN;
4129 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4130 param = ISCSI_PARAM_MAX_R2T;
4131 else if (attr == &dev_attr_sess_immediate_data.attr)
4132 param = ISCSI_PARAM_IMM_DATA_EN;
4133 else if (attr == &dev_attr_sess_first_burst_len.attr)
4134 param = ISCSI_PARAM_FIRST_BURST;
4135 else if (attr == &dev_attr_sess_max_burst_len.attr)
4136 param = ISCSI_PARAM_MAX_BURST;
4137 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4138 param = ISCSI_PARAM_PDU_INORDER_EN;
4139 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4140 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4141 else if (attr == &dev_attr_sess_erl.attr)
4142 param = ISCSI_PARAM_ERL;
4143 else if (attr == &dev_attr_sess_targetname.attr)
4144 param = ISCSI_PARAM_TARGET_NAME;
4145 else if (attr == &dev_attr_sess_tpgt.attr)
4146 param = ISCSI_PARAM_TPGT;
30534952
MC		 4147 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4148 param = ISCSI_PARAM_CHAP_IN_IDX;
4149 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4150 param = ISCSI_PARAM_CHAP_OUT_IDX;
1d063c17
MC		 4151 else if (attr == &dev_attr_sess_password.attr)
4152 param = ISCSI_PARAM_USERNAME;
4153 else if (attr == &dev_attr_sess_password_in.attr)
4154 param = ISCSI_PARAM_USERNAME_IN;
4155 else if (attr == &dev_attr_sess_username.attr)
4156 param = ISCSI_PARAM_PASSWORD;
4157 else if (attr == &dev_attr_sess_username_in.attr)
4158 param = ISCSI_PARAM_PASSWORD_IN;
4159 else if (attr == &dev_attr_sess_fast_abort.attr)
4160 param = ISCSI_PARAM_FAST_ABORT;
4161 else if (attr == &dev_attr_sess_abort_tmo.attr)
4162 param = ISCSI_PARAM_ABORT_TMO;
4163 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4164 param = ISCSI_PARAM_LU_RESET_TMO;
4165 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4166 param = ISCSI_PARAM_TGT_RESET_TMO;
4167 else if (attr == &dev_attr_sess_ifacename.attr)
4168 param = ISCSI_PARAM_IFACE_NAME;
4169 else if (attr == &dev_attr_sess_initiatorname.attr)
4170 param = ISCSI_PARAM_INITIATOR_NAME;
4171 else if (attr == &dev_attr_sess_targetalias.attr)
4172 param = ISCSI_PARAM_TARGET_ALIAS;
3b9373e9
EW		 4173 else if (attr == &dev_attr_sess_boot_root.attr)
4174 param = ISCSI_PARAM_BOOT_ROOT;
4175 else if (attr == &dev_attr_sess_boot_nic.attr)
4176 param = ISCSI_PARAM_BOOT_NIC;
4177 else if (attr == &dev_attr_sess_boot_target.attr)
4178 param = ISCSI_PARAM_BOOT_TARGET;
ae542edb
AC		 4179 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4180 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4181 else if (attr == &dev_attr_sess_discovery_session.attr)
4182 param = ISCSI_PARAM_DISCOVERY_SESS;
4183 else if (attr == &dev_attr_sess_portal_type.attr)
4184 param = ISCSI_PARAM_PORTAL_TYPE;
4185 else if (attr == &dev_attr_sess_chap_auth.attr)
4186 param = ISCSI_PARAM_CHAP_AUTH_EN;
4187 else if (attr == &dev_attr_sess_discovery_logout.attr)
4188 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4189 else if (attr == &dev_attr_sess_bidi_chap.attr)
4190 param = ISCSI_PARAM_BIDI_CHAP_EN;
4191 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4192 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4193 else if (attr == &dev_attr_sess_def_time2wait.attr)
4194 param = ISCSI_PARAM_DEF_TIME2WAIT;
4195 else if (attr == &dev_attr_sess_def_time2retain.attr)
4196 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4197 else if (attr == &dev_attr_sess_isid.attr)
4198 param = ISCSI_PARAM_ISID;
4199 else if (attr == &dev_attr_sess_tsid.attr)
4200 param = ISCSI_PARAM_TSID;
4201 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4202 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4203 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4204 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4205 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4206 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
1d063c17
MC		 4207 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4208 return S_IRUGO | S_IWUSR;
4209 else if (attr == &dev_attr_priv_sess_state.attr)
4210 return S_IRUGO;
0c70d84b
MC		 4211 else if (attr == &dev_attr_priv_sess_creator.attr)
4212 return S_IRUGO;
930a9f04
MR		 4213 else if (attr == &dev_attr_priv_sess_target_id.attr)
4214 return S_IRUGO;
1d063c17
MC		 4215 else {
4216 WARN_ONCE(1, "Invalid session attr");
4217 return 0;
4218 }
4219
4220 return t->attr_is_visible(ISCSI_PARAM, param);
4221}
4222
4223static struct attribute_group iscsi_session_group = {
4224 .attrs = iscsi_session_attrs,
4225 .is_visible = iscsi_session_attr_is_visible,
4226};
4227
1819dc81
MC		 4228/*
4229 * iSCSI host attrs
4230 */
4231#define iscsi_host_attr_show(param) \
4232static ssize_t \
ee959b00
TJ		 4233show_host_param_##param(struct device *dev, \
4234 struct device_attribute *attr, char *buf) \
1819dc81 4235{ \
ee959b00 4236 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1819dc81
MC		 4237 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4238 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4239}
4240
4241#define iscsi_host_attr(field, param) \
4242 iscsi_host_attr_show(param) \
4243static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4244 NULL);
4245
d8196ed2 4246iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
1819dc81 4247iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
d8196ed2 4248iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
8ad5781a 4249iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
aeddde29
VC		 4250iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4251iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
1819dc81 4252
f27fb2ef
MC		 4253static struct attribute *iscsi_host_attrs[] = {
4254 &dev_attr_host_netdev.attr,
4255 &dev_attr_host_hwaddress.attr,
4256 &dev_attr_host_ipaddress.attr,
4257 &dev_attr_host_initiatorname.attr,
aeddde29
VC		 4258 &dev_attr_host_port_state.attr,
4259 &dev_attr_host_port_speed.attr,
f27fb2ef
MC		 4260 NULL,
4261};
4262
587a1f16 4263static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
f27fb2ef
MC		 4264 struct attribute *attr, int i)
4265{
4266 struct device *cdev = container_of(kobj, struct device, kobj);
4267 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4268 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4269 int param;
4270
4271 if (attr == &dev_attr_host_netdev.attr)
4272 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4273 else if (attr == &dev_attr_host_hwaddress.attr)
4274 param = ISCSI_HOST_PARAM_HWADDRESS;
4275 else if (attr == &dev_attr_host_ipaddress.attr)
4276 param = ISCSI_HOST_PARAM_IPADDRESS;
4277 else if (attr == &dev_attr_host_initiatorname.attr)
4278 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
aeddde29
VC		 4279 else if (attr == &dev_attr_host_port_state.attr)
4280 param = ISCSI_HOST_PARAM_PORT_STATE;
4281 else if (attr == &dev_attr_host_port_speed.attr)
4282 param = ISCSI_HOST_PARAM_PORT_SPEED;
f27fb2ef
MC		 4283 else {
4284 WARN_ONCE(1, "Invalid host attr");
4285 return 0;
4286 }
4287
4288 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4289}
4290
4291static struct attribute_group iscsi_host_group = {
4292 .attrs = iscsi_host_attrs,
4293 .is_visible = iscsi_host_attr_is_visible,
4294};
1819dc81 4295
aeddde29
VC		 4296/* convert iscsi_port_speed values to ascii string name */
4297static const struct {
4298 enum iscsi_port_speed value;
4299 char *name;
4300} iscsi_port_speed_names[] = {
4301 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4302 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4303 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4304 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4305 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
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);
Linux kernel - Deliverables
This page took 1.128128 seconds and 5 git commands to generate.