blob: e4b3d8f4fd85e25f09c19af401476a261d457b49 [file] [log] [blame]
Alex Aizman0896b752005-08-04 19:33:07 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * iSCSI transport class definitions
3 *
4 * Copyright (C) IBM Corporation, 2004
Alex Aizman0896b752005-08-04 19:33:07 -07005 * Copyright (C) Mike Christie, 2004 - 2005
6 * Copyright (C) Dmitry Yusupov, 2004 - 2005
7 * Copyright (C) Alex Aizman, 2004 - 2005
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
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>
Arjan van de Ven0b950672006-01-11 13:16:10 +010024#include <linux/mutex.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Mike Christie90eeb012011-07-25 13:48:50 -050026#include <linux/bsg-lib.h>
Mike Christie8d4a6902011-10-06 03:56:57 -050027#include <linux/idr.h>
Alex Aizman0896b752005-08-04 19:33:07 -070028#include <net/tcp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#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>
Alex Aizman0896b752005-08-04 19:33:07 -070034#include <scsi/iscsi_if.h>
Mike Christiec01be6d2010-07-22 16:59:49 +053035#include <scsi/scsi_cmnd.h>
Mike Christie90eeb012011-07-25 13:48:50 -050036#include <scsi/scsi_bsg_iscsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Mike Christie4c2133c2008-06-16 10:11:34 -050038#define ISCSI_TRANSPORT_VERSION "2.0-870"
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Mike Christie632248a2009-08-20 15:11:01 -050040static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070072struct iscsi_internal {
73 struct scsi_transport_template t;
Alex Aizman0896b752005-08-04 19:33:07 -070074 struct iscsi_transport *iscsi_transport;
75 struct list_head list;
Tony Jonesee959b02008-02-22 00:13:36 +010076 struct device dev;
Mike Christie30a6c652006-04-06 21:13:39 -050077
Alex Aizman0896b752005-08-04 19:33:07 -070078 struct transport_container conn_cont;
Alex Aizman0896b752005-08-04 19:33:07 -070079 struct transport_container session_cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
Mike Christie41be1442007-02-28 17:32:18 -060082static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
Mike Christied8bf5412007-12-13 12:43:27 -060083static struct workqueue_struct *iscsi_eh_timer_workq;
Mike Christieb5c7a122006-04-06 21:13:33 -050084
Mike Christie8d4a6902011-10-06 03:56:57 -050085static DEFINE_IDA(iscsi_sess_ida);
Alex Aizman0896b752005-08-04 19:33:07 -070086/*
87 * list of registered transports and lock that must
88 * be held while accessing list. The iscsi_transport_lock must
Arjan van de Ven0b950672006-01-11 13:16:10 +010089 * be acquired after the rx_queue_mutex.
Alex Aizman0896b752005-08-04 19:33:07 -070090 */
91static LIST_HEAD(iscsi_transports);
92static DEFINE_SPINLOCK(iscsi_transport_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Alex Aizman0896b752005-08-04 19:33:07 -070094#define to_iscsi_internal(tmpl) \
95 container_of(tmpl, struct iscsi_internal, t)
96
Tony Jonesee959b02008-02-22 00:13:36 +010097#define dev_to_iscsi_internal(_dev) \
98 container_of(_dev, struct iscsi_internal, dev)
Alex Aizman0896b752005-08-04 19:33:07 -070099
Tony Jonesee959b02008-02-22 00:13:36 +0100100static void iscsi_transport_release(struct device *dev)
Alex Aizman0896b752005-08-04 19:33:07 -0700101{
Tony Jonesee959b02008-02-22 00:13:36 +0100102 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
Alex Aizman0896b752005-08-04 19:33:07 -0700103 kfree(priv);
104}
105
106/*
107 * iscsi_transport_class represents the iscsi_transports that are
108 * registered.
109 */
110static struct class iscsi_transport_class = {
111 .name = "iscsi_transport",
Tony Jonesee959b02008-02-22 00:13:36 +0100112 .dev_release = iscsi_transport_release,
Alex Aizman0896b752005-08-04 19:33:07 -0700113};
114
115static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100116show_transport_handle(struct device *dev, struct device_attribute *attr,
117 char *buf)
Alex Aizman0896b752005-08-04 19:33:07 -0700118{
Tony Jonesee959b02008-02-22 00:13:36 +0100119 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
Mike Christie762e2bf2005-09-12 21:01:46 -0500120 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
Alex Aizman0896b752005-08-04 19:33:07 -0700121}
Tony Jonesee959b02008-02-22 00:13:36 +0100122static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
Alex Aizman0896b752005-08-04 19:33:07 -0700123
124#define show_transport_attr(name, format) \
125static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100126show_transport_##name(struct device *dev, \
127 struct device_attribute *attr,char *buf) \
Alex Aizman0896b752005-08-04 19:33:07 -0700128{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100129 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
Alex Aizman0896b752005-08-04 19:33:07 -0700130 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
131} \
Tony Jonesee959b02008-02-22 00:13:36 +0100132static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
Alex Aizman0896b752005-08-04 19:33:07 -0700133
134show_transport_attr(caps, "0x%x");
Alex Aizman0896b752005-08-04 19:33:07 -0700135
136static struct attribute *iscsi_transport_attrs[] = {
Tony Jonesee959b02008-02-22 00:13:36 +0100137 &dev_attr_handle.attr,
138 &dev_attr_caps.attr,
Alex Aizman0896b752005-08-04 19:33:07 -0700139 NULL,
140};
141
142static struct attribute_group iscsi_transport_group = {
143 .attrs = iscsi_transport_attrs,
144};
145
Mike Christied82ff9be2008-05-21 15:54:13 -0500146/*
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);
Mike Christie21536062008-09-24 11:46:11 -0500171 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
Mike Christied82ff9be2008-05-21 15:54:13 -0500172}
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
Michał Mirosław9f3b7952013-02-01 20:40:17 +0100186static int iscsi_match_epid(struct device *dev, const void *data)
Mike Christied82ff9be2008-05-21 15:54:13 -0500187{
188 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
Michał Mirosław9f3b7952013-02-01 20:40:17 +0100189 const uint64_t *epid = data;
Mike Christied82ff9be2008-05-21 15:54:13 -0500190
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;
Mike Christie21536062008-09-24 11:46:11 -0500199 uint64_t id;
Mike Christied82ff9be2008-05-21 15:54:13 -0500200 int err;
201
202 for (id = 1; id < ISCSI_MAX_EPID; id++) {
Greg Kroah-Hartman695794a2008-05-22 17:21:08 -0400203 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
Mike Christied82ff9be2008-05-21 15:54:13 -0500204 iscsi_match_epid);
205 if (!dev)
206 break;
Sagi Grimberg4ce30872015-05-20 12:38:58 +0300207 else
208 put_device(dev);
Mike Christied82ff9be2008-05-21 15:54:13 -0500209 }
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;
Kay Sievers71610f52008-12-03 22:41:36 +0100222 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
Mike Christied82ff9be2008-05-21 15:54:13 -0500223 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{
Mike Christief80f8682008-06-16 10:11:35 -0500254 struct iscsi_endpoint *ep;
Mike Christied82ff9be2008-05-21 15:54:13 -0500255 struct device *dev;
256
Greg Kroah-Hartman695794a2008-05-22 17:21:08 -0400257 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
Mike Christied82ff9be2008-05-21 15:54:13 -0500258 iscsi_match_epid);
259 if (!dev)
260 return NULL;
261
Mike Christief80f8682008-06-16 10:11:35 -0500262 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;
Mike Christied82ff9be2008-05-21 15:54:13 -0500269}
270EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
271
Mike Christie8d079132011-07-25 13:48:40 -0500272/*
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
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400310#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 */
Mike Christie8d079132011-07-25 13:48:40 -0500315iscsi_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);
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400319iscsi_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);
Mike Christie8d079132011-07-25 13:48:40 -0500344
345/* generic read only ipv6 attribute */
346iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400347iscsi_iface_net_attr(ipv6_iface, link_local_addr,
348 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
Mike Christie8d079132011-07-25 13:48:40 -0500349iscsi_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);
Mike Christie88f4f512011-10-06 03:56:58 -0500352iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
Mike Christie8d079132011-07-25 13:48:40 -0500353 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400354iscsi_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);
Mike Christie8d079132011-07-25 13:48:40 -0500375
376/* common read only iface attribute */
377iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
Mike Christie2d636732011-10-11 17:55:11 -0500378iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
Mike Christie4223b9e2011-07-25 13:48:47 -0500379iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
380iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
Vikas Chaudhary8c7d40f2011-08-01 03:26:12 -0700381iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
Vikas Chaudharyfcb51242011-08-01 03:26:18 -0700382iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400383iscsi_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);
Mike Christie8d079132011-07-25 13:48:40 -0500417
Al Viro587a1f12011-07-23 23:11:19 -0400418static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
Mike Christie8d079132011-07-25 13:48:40 -0500419 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;
Mike Christieb78dbba2011-07-25 13:48:44 -0500424 int param;
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400425 int param_type;
Mike Christie8d079132011-07-25 13:48:40 -0500426
427 if (attr == &dev_attr_iface_enabled.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500428 param = ISCSI_NET_PARAM_IFACE_ENABLE;
Mike Christie2d636732011-10-11 17:55:11 -0500429 else if (attr == &dev_attr_iface_vlan_id.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500430 param = ISCSI_NET_PARAM_VLAN_ID;
Mike Christie4223b9e2011-07-25 13:48:47 -0500431 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;
Vikas Chaudhary8c7d40f2011-08-01 03:26:12 -0700435 else if (attr == &dev_attr_iface_mtu.attr)
436 param = ISCSI_NET_PARAM_MTU;
Vikas Chaudharyfcb51242011-08-01 03:26:18 -0700437 else if (attr == &dev_attr_iface_port.attr)
438 param = ISCSI_NET_PARAM_PORT;
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400439 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;
Mike Christieb78dbba2011-07-25 13:48:44 -0500493 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
Mike Christie8d079132011-07-25 13:48:40 -0500494 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500495 param = ISCSI_NET_PARAM_IPV4_ADDR;
Mike Christie8d079132011-07-25 13:48:40 -0500496 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500497 param = ISCSI_NET_PARAM_IPV4_GW;
Mike Christie8d079132011-07-25 13:48:40 -0500498 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500499 param = ISCSI_NET_PARAM_IPV4_SUBNET;
Mike Christie8d079132011-07-25 13:48:40 -0500500 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500501 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400502 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;
Mike Christieb78dbba2011-07-25 13:48:44 -0500538 else
539 return 0;
Mike Christie8d079132011-07-25 13:48:40 -0500540 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
541 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500542 param = ISCSI_NET_PARAM_IPV6_ADDR;
Mike Christie8d079132011-07-25 13:48:40 -0500543 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500544 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
Mike Christie8d079132011-07-25 13:48:40 -0500545 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500546 param = ISCSI_NET_PARAM_IPV6_ROUTER;
Mike Christie8d079132011-07-25 13:48:40 -0500547 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500548 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
Mike Christie88f4f512011-10-06 03:56:58 -0500549 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
Mike Christieb78dbba2011-07-25 13:48:44 -0500550 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400551 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;
Mike Christieb78dbba2011-07-25 13:48:44 -0500576 else
577 return 0;
578 } else {
579 WARN_ONCE(1, "Invalid iface attr");
580 return 0;
Mike Christie8d079132011-07-25 13:48:40 -0500581 }
582
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400583 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);
Mike Christie8d079132011-07-25 13:48:40 -0500609}
610
611static struct attribute *iscsi_iface_attrs[] = {
612 &dev_attr_iface_enabled.attr,
Mike Christie2d636732011-10-11 17:55:11 -0500613 &dev_attr_iface_vlan_id.attr,
Mike Christie4223b9e2011-07-25 13:48:47 -0500614 &dev_attr_iface_vlan_priority.attr,
615 &dev_attr_iface_vlan_enabled.attr,
Mike Christie8d079132011-07-25 13:48:40 -0500616 &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,
Mike Christie88f4f512011-10-06 03:56:58 -0500624 &dev_attr_ipv6_iface_link_local_autocfg.attr,
Vikas Chaudhary8c7d40f2011-08-01 03:26:12 -0700625 &dev_attr_iface_mtu.attr,
Vikas Chaudharyfcb51242011-08-01 03:26:18 -0700626 &dev_attr_iface_port.attr,
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400627 &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,
Mike Christie8d079132011-07-25 13:48:40 -0500680 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
Harish Zunjarrao3e0f65b2013-10-18 09:01:41 -0400688/* 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
Mike Christie8d079132011-07-25 13:48:40 -0500743struct 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
Mike Christie90eeb012011-07-25 13:48:50 -0500798/*
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -0400799 * 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:
Masanari Iidae2278672014-02-18 22:54:36 +09001230 * pointer to allocated flashnode sess on success
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001231 * %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
Mike Christie8526cb12013-05-06 12:06:56 -05001357 * @idx: index to match
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001358 *
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 *
Mike Christie8526cb12013-05-06 12:06:56 -05001366iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001367{
1368 struct iscsi_bus_flash_session *fnode_sess = NULL;
1369 struct device *dev;
1370
Mike Christie8526cb12013-05-06 12:06:56 -05001371 dev = device_find_child(&shost->shost_gendev, &idx,
1372 flashnode_match_index);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001373 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{
Mike Christie8526cb12013-05-06 12:06:56 -05001396 return device_find_child(&shost->shost_gendev, data, fn);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001397}
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
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001403 *
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 *
Mike Christie8526cb12013-05-06 12:06:56 -05001412iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001413{
Mike Christie8526cb12013-05-06 12:06:56 -05001414 return device_find_child(&fnode_sess->dev, NULL,
1415 iscsi_is_flashnode_conn_dev);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001416}
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/**
Masanari Iidae2278672014-02-18 22:54:36 +09001428 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001429 * @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/**
Masanari Iidae2278672014-02-18 22:54:36 +09001458 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04001459 * @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
1471/*
Mike Christie90eeb012011-07-25 13:48:50 -05001472 * 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
Marcos Paulo de Souzaeae627e2011-11-02 11:17:17 -02001532 * @ihost: iscsi_cls_host adding the structures to
Mike Christie90eeb012011-07-25 13:48:50 -05001533 */
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
Mike Christie30a6c652006-04-06 21:13:39 -05001564static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
Tony Jonesee959b02008-02-22 00:13:36 +01001565 struct device *cdev)
Mike Christie30a6c652006-04-06 21:13:39 -05001566{
1567 struct Scsi_Host *shost = dev_to_shost(dev);
Mike Christie32c6e1b2008-05-21 15:53:58 -05001568 struct iscsi_cls_host *ihost = shost->shost_data;
Mike Christie30a6c652006-04-06 21:13:39 -05001569
1570 memset(ihost, 0, sizeof(*ihost));
Mike Christie8aae18a2008-01-31 13:36:48 -06001571 atomic_set(&ihost->nr_scans, 0);
Mike Christie79706342008-05-21 15:54:12 -05001572 mutex_init(&ihost->mutex);
Mike Christie90eeb012011-07-25 13:48:50 -05001573
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) {
Tejun Heo86072d82012-06-04 20:40:54 -07001587 bsg_unregister_queue(ihost->bsg_q);
Mike Christie90eeb012011-07-25 13:48:50 -05001588 blk_cleanup_queue(ihost->bsg_q);
1589 }
Mike Christie30a6c652006-04-06 21:13:39 -05001590 return 0;
1591}
1592
1593static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1594 "iscsi_host",
1595 iscsi_setup_host,
Mike Christie90eeb012011-07-25 13:48:50 -05001596 iscsi_remove_host,
Mike Christie30a6c652006-04-06 21:13:39 -05001597 NULL);
1598
Alex Aizman0896b752005-08-04 19:33:07 -07001599static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1600 "iscsi_session",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 NULL,
1602 NULL,
1603 NULL);
1604
Alex Aizman0896b752005-08-04 19:33:07 -07001605static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1606 "iscsi_connection",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 NULL,
1608 NULL,
1609 NULL);
Alex Aizman0896b752005-08-04 19:33:07 -07001610
1611static struct sock *nls;
Arjan van de Ven0b950672006-01-11 13:16:10 +01001612static DEFINE_MUTEX(rx_queue_mutex);
Alex Aizman0896b752005-08-04 19:33:07 -07001613
Mike Christie7b7232f2006-02-01 21:06:49 -06001614static LIST_HEAD(sesslist);
1615static DEFINE_SPINLOCK(sesslock);
Alex Aizman0896b752005-08-04 19:33:07 -07001616static LIST_HEAD(connlist);
1617static DEFINE_SPINLOCK(connlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618
Mike Christieb5c7a122006-04-06 21:13:33 -05001619static 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)
Mike Christie7b7232f2006-02-01 21:06:49 -06001629{
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) {
Mike Christieb5c7a122006-04-06 21:13:33 -05001635 if (sess->sid == sid) {
Mike Christie7b7232f2006-02-01 21:06:49 -06001636 spin_unlock_irqrestore(&sesslock, flags);
1637 return sess;
1638 }
1639 }
1640 spin_unlock_irqrestore(&sesslock, flags);
1641 return NULL;
1642}
1643
Mike Christieb5c7a122006-04-06 21:13:33 -05001644/*
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)
Mike Christie7b7232f2006-02-01 21:06:49 -06001648{
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) {
Mike Christieb5c7a122006-04-06 21:13:33 -05001654 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
Mike Christie7b7232f2006-02-01 21:06:49 -06001655 spin_unlock_irqrestore(&connlock, flags);
1656 return conn;
1657 }
1658 }
1659 spin_unlock_irqrestore(&connlock, flags);
1660 return NULL;
1661}
1662
Mike Christie7b8631b2006-01-13 18:05:50 -06001663/*
1664 * The following functions can be used by LLDs that allocate
1665 * their own scsi_hosts or by software iscsi LLDs
1666 */
Mike Christie6eabafb2008-01-31 13:36:43 -06001667static 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
Adrian Bunk3b0f2082008-02-13 23:30:17 +02001676static const char *iscsi_session_state_name(int state)
Mike Christie6eabafb2008-01-31 13:36:43 -06001677{
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:
Andrew Vasquez9a1a69a12009-04-29 13:12:39 -05001701 err = DID_IMM_RETRY << 16;
Mike Christie6eabafb2008-01-31 13:36:43 -06001702 break;
1703 case ISCSI_SESSION_FREE:
Mike Christie56d7fcf2008-08-19 18:45:26 -05001704 err = DID_TRANSPORT_FAILFAST << 16;
Mike Christie6eabafb2008-01-31 13:36:43 -06001705 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
Manish Rangankar17fa5752011-07-25 13:48:52 -05001715int 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
Mike Christie7b8631b2006-01-13 18:05:50 -06001728static void iscsi_session_release(struct device *dev)
1729{
1730 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
Mike Christie7b8631b2006-01-13 18:05:50 -06001731 struct Scsi_Host *shost;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732
Mike Christie7b8631b2006-01-13 18:05:50 -06001733 shost = iscsi_session_to_shost(session);
1734 scsi_host_put(shost);
Mike Christie632248a2009-08-20 15:11:01 -05001735 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
Mike Christie7b8631b2006-01-13 18:05:50 -06001736 kfree(session);
Mike Christie7b8631b2006-01-13 18:05:50 -06001737}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738
Nilesh Javali6260a5d2012-02-27 03:08:51 -08001739int iscsi_is_session_dev(const struct device *dev)
Mike Christie7b8631b2006-01-13 18:05:50 -06001740{
1741 return dev->release == iscsi_session_release;
1742}
Nilesh Javali6260a5d2012-02-27 03:08:51 -08001743EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744
Mike Christiea4804cd2008-05-21 15:54:00 -05001745static 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
Mike Christie8aae18a2008-01-31 13:36:48 -06001763/**
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{
Mike Christie32c6e1b2008-05-21 15:53:58 -05001773 struct iscsi_cls_host *ihost = shost->shost_data;
Mike Christie8aae18a2008-01-31 13:36:48 -06001774 /*
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
Mike Christie79706342008-05-21 15:54:12 -05001782struct iscsi_scan_data {
1783 unsigned int channel;
1784 unsigned int id;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02001785 u64 lun;
Mike Christie79706342008-05-21 15:54:12 -05001786};
1787
1788static int iscsi_user_scan_session(struct device *dev, void *data)
1789{
1790 struct iscsi_scan_data *scan_data = data;
1791 struct iscsi_cls_session *session;
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);
Mike Christie632248a2009-08-20 15:11:01 -05001801
1802 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1803
Mike Christie79706342008-05-21 15:54:12 -05001804 shost = iscsi_session_to_shost(session);
1805 ihost = shost->shost_data;
1806
1807 mutex_lock(&ihost->mutex);
1808 spin_lock_irqsave(&session->lock, flags);
1809 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1810 spin_unlock_irqrestore(&session->lock, flags);
Mike Christie632248a2009-08-20 15:11:01 -05001811 goto user_scan_exit;
Mike Christie79706342008-05-21 15:54:12 -05001812 }
1813 id = session->target_id;
1814 spin_unlock_irqrestore(&session->lock, flags);
1815
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 }
Mike Christie632248a2009-08-20 15:11:01 -05001824
1825user_scan_exit:
Mike Christie79706342008-05-21 15:54:12 -05001826 mutex_unlock(&ihost->mutex);
Mike Christie632248a2009-08-20 15:11:01 -05001827 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
Mike Christie79706342008-05-21 15:54:12 -05001828 return 0;
1829}
1830
Mike Christie30a6c652006-04-06 21:13:39 -05001831static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02001832 uint id, u64 lun)
Mike Christie30a6c652006-04-06 21:13:39 -05001833{
Mike Christie79706342008-05-21 15:54:12 -05001834 struct iscsi_scan_data scan_data;
Mike Christie30a6c652006-04-06 21:13:39 -05001835
Mike Christie79706342008-05-21 15:54:12 -05001836 scan_data.channel = channel;
1837 scan_data.id = id;
1838 scan_data.lun = lun;
Mike Christie30a6c652006-04-06 21:13:39 -05001839
Mike Christie79706342008-05-21 15:54:12 -05001840 return device_for_each_child(&shost->shost_gendev, &scan_data,
1841 iscsi_user_scan_session);
Mike Christie30a6c652006-04-06 21:13:39 -05001842}
1843
Mike Christiebd976f62008-01-31 13:36:46 -06001844static 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);
Mike Christie8aae18a2008-01-31 13:36:48 -06001848 struct Scsi_Host *shost = iscsi_session_to_shost(session);
Mike Christie32c6e1b2008-05-21 15:53:58 -05001849 struct iscsi_cls_host *ihost = shost->shost_data;
Mike Christie79706342008-05-21 15:54:12 -05001850 struct iscsi_scan_data scan_data;
Mike Christiebd976f62008-01-31 13:36:46 -06001851
Mike Christie79706342008-05-21 15:54:12 -05001852 scan_data.channel = 0;
1853 scan_data.id = SCAN_WILD_CARD;
1854 scan_data.lun = SCAN_WILD_CARD;
Mike Christiebd976f62008-01-31 13:36:46 -06001855
Mike Christie79706342008-05-21 15:54:12 -05001856 iscsi_user_scan_session(&session->dev, &scan_data);
Mike Christie8aae18a2008-01-31 13:36:48 -06001857 atomic_dec(&ihost->nr_scans);
Mike Christiebd976f62008-01-31 13:36:46 -06001858}
1859
Mike Christiec01be6d2010-07-22 16:59:49 +05301860/**
1861 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
Randy Dunlape6d4ef42010-08-14 13:05:41 -07001862 * @cmd: scsi cmd passed to scsi eh handler
Mike Christiec01be6d2010-07-22 16:59:49 +05301863 *
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
David Howellsc4028952006-11-22 14:57:56 +00001891static void session_recovery_timedout(struct work_struct *work)
Mike Christie30a6c652006-04-06 21:13:39 -05001892{
David Howellsc4028952006-11-22 14:57:56 +00001893 struct iscsi_cls_session *session =
1894 container_of(work, struct iscsi_cls_session,
1895 recovery_work.work);
Mike Christie6eabafb2008-01-31 13:36:43 -06001896 unsigned long flags;
Mike Christie30a6c652006-04-06 21:13:39 -05001897
Mike Christie322d7392008-01-31 13:36:52 -06001898 iscsi_cls_session_printk(KERN_INFO, session,
1899 "session recovery timed out after %d secs\n",
1900 session->recovery_tmo);
Mike Christie30a6c652006-04-06 21:13:39 -05001901
Mike Christie6eabafb2008-01-31 13:36:43 -06001902 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
Mike Christie30a6c652006-04-06 21:13:39 -05001915 if (session->transport->session_recovery_timedout)
1916 session->transport->session_recovery_timedout(session);
1917
Mike Christie632248a2009-08-20 15:11:01 -05001918 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
Mike Christie5d9fb5c2012-05-17 23:56:57 -05001919 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
Mike Christie632248a2009-08-20 15:11:01 -05001920 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
Mike Christie30a6c652006-04-06 21:13:39 -05001921}
1922
Mike Christie45ab33b2008-03-04 13:26:55 -06001923static void __iscsi_unblock_session(struct work_struct *work)
Mike Christie30a6c652006-04-06 21:13:39 -05001924{
Mike Christie45ab33b2008-03-04 13:26:55 -06001925 struct iscsi_cls_session *session =
1926 container_of(work, struct iscsi_cls_session,
1927 unblock_work);
Mike Christiebd976f62008-01-31 13:36:46 -06001928 struct Scsi_Host *shost = iscsi_session_to_shost(session);
Mike Christie32c6e1b2008-05-21 15:53:58 -05001929 struct iscsi_cls_host *ihost = shost->shost_data;
Mike Christie6eabafb2008-01-31 13:36:43 -06001930 unsigned long flags;
1931
Mike Christie632248a2009-08-20 15:11:01 -05001932 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
Mike Christie45ab33b2008-03-04 13:26:55 -06001933 /*
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);
Mike Christie6eabafb2008-01-31 13:36:43 -06001938 spin_lock_irqsave(&session->lock, flags);
1939 session->state = ISCSI_SESSION_LOGGED_IN;
1940 spin_unlock_irqrestore(&session->lock, flags);
Mike Christie45ab33b2008-03-04 13:26:55 -06001941 /* start IO */
Mike Christie5d9fb5c2012-05-17 23:56:57 -05001942 scsi_target_unblock(&session->dev, SDEV_RUNNING);
Mike Christie8aae18a2008-01-31 13:36:48 -06001943 /*
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) {
Mike Christie06d25af2009-03-05 14:46:02 -06001949 if (scsi_queue_work(shost, &session->scan_work))
Mike Christie8aae18a2008-01-31 13:36:48 -06001950 atomic_inc(&ihost->nr_scans);
1951 }
Mike Christie632248a2009-08-20 15:11:01 -05001952 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
Mike Christie6eabafb2008-01-31 13:36:43 -06001953}
Mike Christie45ab33b2008-03-04 13:26:55 -06001954
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}
Mike Christie30a6c652006-04-06 21:13:39 -05001970EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1971
Mike Christie45ab33b2008-03-04 13:26:55 -06001972static void __iscsi_block_session(struct work_struct *work)
Mike Christie30a6c652006-04-06 21:13:39 -05001973{
Mike Christie45ab33b2008-03-04 13:26:55 -06001974 struct iscsi_cls_session *session =
1975 container_of(work, struct iscsi_cls_session,
1976 block_work);
Mike Christie6eabafb2008-01-31 13:36:43 -06001977 unsigned long flags;
1978
Mike Christie632248a2009-08-20 15:11:01 -05001979 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
Mike Christie6eabafb2008-01-31 13:36:43 -06001980 spin_lock_irqsave(&session->lock, flags);
1981 session->state = ISCSI_SESSION_FAILED;
1982 spin_unlock_irqrestore(&session->lock, flags);
Mike Christie30a6c652006-04-06 21:13:39 -05001983 scsi_target_block(&session->dev);
Mike Christie632248a2009-08-20 15:11:01 -05001984 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
Mike Christiefdd46dc2009-11-11 16:34:34 -06001985 if (session->recovery_tmo >= 0)
1986 queue_delayed_work(iscsi_eh_timer_workq,
1987 &session->recovery_work,
1988 session->recovery_tmo * HZ);
Mike Christie30a6c652006-04-06 21:13:39 -05001989}
Mike Christie45ab33b2008-03-04 13:26:55 -06001990
1991void iscsi_block_session(struct iscsi_cls_session *session)
1992{
1993 queue_work(iscsi_eh_timer_workq, &session->block_work);
1994}
Mike Christie30a6c652006-04-06 21:13:39 -05001995EXPORT_SYMBOL_GPL(iscsi_block_session);
1996
Mike Christie26974782007-12-13 12:43:29 -06001997static 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);
Mike Christie32c6e1b2008-05-21 15:53:58 -05002003 struct iscsi_cls_host *ihost = shost->shost_data;
Mike Christie79706342008-05-21 15:54:12 -05002004 unsigned long flags;
Mike Christie8d4a6902011-10-06 03:56:57 -05002005 unsigned int target_id;
Mike Christie26974782007-12-13 12:43:29 -06002006
Mike Christie632248a2009-08-20 15:11:01 -05002007 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2008
Mike Christie26974782007-12-13 12:43:29 -06002009 /* Prevent new scans and make sure scanning is not in progress */
2010 mutex_lock(&ihost->mutex);
Mike Christie79706342008-05-21 15:54:12 -05002011 spin_lock_irqsave(&session->lock, flags);
2012 if (session->target_id == ISCSI_MAX_TARGET) {
2013 spin_unlock_irqrestore(&session->lock, flags);
Mike Christie26974782007-12-13 12:43:29 -06002014 mutex_unlock(&ihost->mutex);
2015 return;
2016 }
Mike Christie8d4a6902011-10-06 03:56:57 -05002017
2018 target_id = session->target_id;
Mike Christie79706342008-05-21 15:54:12 -05002019 session->target_id = ISCSI_MAX_TARGET;
2020 spin_unlock_irqrestore(&session->lock, flags);
Mike Christie26974782007-12-13 12:43:29 -06002021 mutex_unlock(&ihost->mutex);
2022
Mike Christie8d4a6902011-10-06 03:56:57 -05002023 if (session->ida_used)
2024 ida_simple_remove(&iscsi_sess_ida, target_id);
2025
Mike Christie26974782007-12-13 12:43:29 -06002026 scsi_remove_target(&session->dev);
2027 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
Mike Christie632248a2009-08-20 15:11:01 -05002028 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
Mike Christie26974782007-12-13 12:43:29 -06002029}
2030
Mike Christie7b8631b2006-01-13 18:05:50 -06002031struct iscsi_cls_session *
Mike Christie5d91e202008-05-21 15:54:01 -05002032iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2033 int dd_size)
Mike Christie7b8631b2006-01-13 18:05:50 -06002034{
2035 struct iscsi_cls_session *session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036
Mike Christie5d91e202008-05-21 15:54:01 -05002037 session = kzalloc(sizeof(*session) + dd_size,
Mike Christieb5c7a122006-04-06 21:13:33 -05002038 GFP_KERNEL);
Mike Christie7b8631b2006-01-13 18:05:50 -06002039 if (!session)
Mike Christief53a88d2006-06-28 12:00:27 -05002040 return NULL;
2041
Mike Christie7b8631b2006-01-13 18:05:50 -06002042 session->transport = transport;
Mike Christie0c70d842011-12-05 16:44:01 -06002043 session->creator = -1;
Mike Christie30a6c652006-04-06 21:13:39 -05002044 session->recovery_tmo = 120;
Chris Leech9c8108a2015-06-16 16:07:13 -07002045 session->recovery_tmo_sysfs_override = false;
Mike Christie6eabafb2008-01-31 13:36:43 -06002046 session->state = ISCSI_SESSION_FREE;
David Howellsc4028952006-11-22 14:57:56 +00002047 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
Mike Christie30a6c652006-04-06 21:13:39 -05002048 INIT_LIST_HEAD(&session->sess_list);
Mike Christie45ab33b2008-03-04 13:26:55 -06002049 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2050 INIT_WORK(&session->block_work, __iscsi_block_session);
Mike Christie26974782007-12-13 12:43:29 -06002051 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
Mike Christiebd976f62008-01-31 13:36:46 -06002052 INIT_WORK(&session->scan_work, iscsi_scan_session);
Mike Christie6eabafb2008-01-31 13:36:43 -06002053 spin_lock_init(&session->lock);
Mike Christie7b8631b2006-01-13 18:05:50 -06002054
Mike Christie6a8a0d32006-06-28 12:00:31 -05002055 /* this is released in the dev's release function */
2056 scsi_host_get(shost);
Mike Christie8434aa82006-06-28 12:00:30 -05002057 session->dev.parent = &shost->shost_gendev;
2058 session->dev.release = iscsi_session_release;
2059 device_initialize(&session->dev);
Mike Christie5d91e202008-05-21 15:54:01 -05002060 if (dd_size)
Mike Christieb5c7a122006-04-06 21:13:33 -05002061 session->dd_data = &session[1];
Mike Christie632248a2009-08-20 15:11:01 -05002062
2063 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
Mike Christie8434aa82006-06-28 12:00:30 -05002064 return session;
2065}
2066EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2067
Mike Christie6a8a0d32006-06-28 12:00:31 -05002068int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
Mike Christie8434aa82006-06-28 12:00:30 -05002069{
2070 struct Scsi_Host *shost = iscsi_session_to_shost(session);
Mike Christie32c6e1b2008-05-21 15:53:58 -05002071 struct iscsi_cls_host *ihost;
Mike Christie26974782007-12-13 12:43:29 -06002072 unsigned long flags;
Mike Christie8d4a6902011-10-06 03:56:57 -05002073 int id = 0;
Mike Christie8434aa82006-06-28 12:00:30 -05002074 int err;
Mike Christieb5c7a122006-04-06 21:13:33 -05002075
Mike Christie30a6c652006-04-06 21:13:39 -05002076 ihost = shost->shost_data;
Mike Christie41be1442007-02-28 17:32:18 -06002077 session->sid = atomic_add_return(1, &iscsi_session_nr);
Mike Christie79706342008-05-21 15:54:12 -05002078
Mike Christie8d4a6902011-10-06 03:56:57 -05002079 if (target_id == ISCSI_MAX_TARGET) {
2080 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
Mike Christie79706342008-05-21 15:54:12 -05002081
Mike Christie8d4a6902011-10-06 03:56:57 -05002082 if (id < 0) {
Mike Christie79706342008-05-21 15:54:12 -05002083 iscsi_cls_session_printk(KERN_ERR, session,
Mike Christie8d4a6902011-10-06 03:56:57 -05002084 "Failure in Target ID Allocation\n");
2085 return id;
Mike Christie79706342008-05-21 15:54:12 -05002086 }
Mike Christie8d4a6902011-10-06 03:56:57 -05002087 session->target_id = (unsigned int)id;
2088 session->ida_used = true;
2089 } else
2090 session->target_id = target_id;
Mike Christie30a6c652006-04-06 21:13:39 -05002091
Kay Sievers71610f52008-12-03 22:41:36 +01002092 dev_set_name(&session->dev, "session%u", session->sid);
Mike Christie8434aa82006-06-28 12:00:30 -05002093 err = device_add(&session->dev);
Mike Christie7b8631b2006-01-13 18:05:50 -06002094 if (err) {
Mike Christie322d7392008-01-31 13:36:52 -06002095 iscsi_cls_session_printk(KERN_ERR, session,
2096 "could not register session's dev\n");
Mike Christie8d4a6902011-10-06 03:56:57 -05002097 goto release_ida;
Mike Christie7b8631b2006-01-13 18:05:50 -06002098 }
2099 transport_register_device(&session->dev);
2100
Mike Christie26974782007-12-13 12:43:29 -06002101 spin_lock_irqsave(&sesslock, flags);
2102 list_add(&session->sess_list, &sesslist);
2103 spin_unlock_irqrestore(&sesslock, flags);
2104
Mike Christie26974782007-12-13 12:43:29 -06002105 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
Mike Christie632248a2009-08-20 15:11:01 -05002106 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
Mike Christie8434aa82006-06-28 12:00:30 -05002107 return 0;
Mike Christie30a6c652006-04-06 21:13:39 -05002108
Mike Christie8d4a6902011-10-06 03:56:57 -05002109release_ida:
2110 if (session->ida_used)
2111 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2112
Mike Christie8434aa82006-06-28 12:00:30 -05002113 return err;
Mike Christie7b8631b2006-01-13 18:05:50 -06002114}
Mike Christie8434aa82006-06-28 12:00:30 -05002115EXPORT_SYMBOL_GPL(iscsi_add_session);
Mike Christie7b8631b2006-01-13 18:05:50 -06002116
2117/**
Mike Christie8434aa82006-06-28 12:00:30 -05002118 * iscsi_create_session - create iscsi class session
2119 * @shost: scsi host
2120 * @transport: iscsi transport
Mike Christie5d91e202008-05-21 15:54:01 -05002121 * @dd_size: private driver data size
Rob Landleyeb448202007-11-03 13:30:39 -05002122 * @target_id: which target
Mike Christie7b8631b2006-01-13 18:05:50 -06002123 *
Mike Christie8434aa82006-06-28 12:00:30 -05002124 * This can be called from a LLD or iscsi_transport.
Rob Landleyeb448202007-11-03 13:30:39 -05002125 */
Mike Christie8434aa82006-06-28 12:00:30 -05002126struct iscsi_cls_session *
Mike Christie5d91e202008-05-21 15:54:01 -05002127iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2128 int dd_size, unsigned int target_id)
Mike Christie8434aa82006-06-28 12:00:30 -05002129{
2130 struct iscsi_cls_session *session;
2131
Mike Christie5d91e202008-05-21 15:54:01 -05002132 session = iscsi_alloc_session(shost, transport, dd_size);
Mike Christie8434aa82006-06-28 12:00:30 -05002133 if (!session)
2134 return NULL;
2135
Mike Christie6a8a0d32006-06-28 12:00:31 -05002136 if (iscsi_add_session(session, target_id)) {
Mike Christie8434aa82006-06-28 12:00:30 -05002137 iscsi_free_session(session);
2138 return NULL;
2139 }
2140 return session;
2141}
2142EXPORT_SYMBOL_GPL(iscsi_create_session);
2143
Mike Christie26974782007-12-13 12:43:29 -06002144static void iscsi_conn_release(struct device *dev)
2145{
2146 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2147 struct device *parent = conn->dev.parent;
2148
Mike Christie632248a2009-08-20 15:11:01 -05002149 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
Mike Christie26974782007-12-13 12:43:29 -06002150 kfree(conn);
2151 put_device(parent);
2152}
2153
2154static int iscsi_is_conn_dev(const struct device *dev)
2155{
2156 return dev->release == iscsi_conn_release;
2157}
2158
2159static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2160{
2161 if (!iscsi_is_conn_dev(dev))
2162 return 0;
2163 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2164}
2165
Mike Christie8434aa82006-06-28 12:00:30 -05002166void iscsi_remove_session(struct iscsi_cls_session *session)
Mike Christie7b8631b2006-01-13 18:05:50 -06002167{
Mike Christie30a6c652006-04-06 21:13:39 -05002168 struct Scsi_Host *shost = iscsi_session_to_shost(session);
Mike Christie26974782007-12-13 12:43:29 -06002169 unsigned long flags;
2170 int err;
Mike Christie30a6c652006-04-06 21:13:39 -05002171
Mike Christie632248a2009-08-20 15:11:01 -05002172 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2173
Mike Christie26974782007-12-13 12:43:29 -06002174 spin_lock_irqsave(&sesslock, flags);
2175 list_del(&session->sess_list);
2176 spin_unlock_irqrestore(&sesslock, flags);
2177
Mike Christie45ab33b2008-03-04 13:26:55 -06002178 /* make sure there are no blocks/unblocks queued */
2179 flush_workqueue(iscsi_eh_timer_workq);
2180 /* make sure the timedout callout is not running */
2181 if (!cancel_delayed_work(&session->recovery_work))
2182 flush_workqueue(iscsi_eh_timer_workq);
Mike Christie26974782007-12-13 12:43:29 -06002183 /*
2184 * If we are blocked let commands flow again. The lld or iscsi
2185 * layer should set up the queuecommand to fail commands.
Mike Christie45ab33b2008-03-04 13:26:55 -06002186 * We assume that LLD will not be calling block/unblock while
2187 * removing the session.
Mike Christie26974782007-12-13 12:43:29 -06002188 */
Mike Christie6eabafb2008-01-31 13:36:43 -06002189 spin_lock_irqsave(&session->lock, flags);
2190 session->state = ISCSI_SESSION_FREE;
2191 spin_unlock_irqrestore(&session->lock, flags);
Mike Christiebd976f62008-01-31 13:36:46 -06002192
Mike Christie5d9fb5c2012-05-17 23:56:57 -05002193 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
Mike Christie45ab33b2008-03-04 13:26:55 -06002194 /* flush running scans then delete devices */
Mike Christie06d25af2009-03-05 14:46:02 -06002195 scsi_flush_work(shost);
Mike Christie45ab33b2008-03-04 13:26:55 -06002196 __iscsi_unbind_session(&session->unbind_work);
Mike Christie30a6c652006-04-06 21:13:39 -05002197
Mike Christie26974782007-12-13 12:43:29 -06002198 /* hw iscsi may not have removed all connections from session */
2199 err = device_for_each_child(&session->dev, NULL,
2200 iscsi_iter_destroy_conn_fn);
2201 if (err)
Mike Christie322d7392008-01-31 13:36:52 -06002202 iscsi_cls_session_printk(KERN_ERR, session,
2203 "Could not delete all connections "
2204 "for session. Error %d.\n", err);
Mike Christie8434aa82006-06-28 12:00:30 -05002205
Mike Christie7b8631b2006-01-13 18:05:50 -06002206 transport_unregister_device(&session->dev);
Mike Christie632248a2009-08-20 15:11:01 -05002207
2208 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
Mike Christie8434aa82006-06-28 12:00:30 -05002209 device_del(&session->dev);
2210}
2211EXPORT_SYMBOL_GPL(iscsi_remove_session);
2212
2213void iscsi_free_session(struct iscsi_cls_session *session)
2214{
Mike Christie632248a2009-08-20 15:11:01 -05002215 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
Mike Christie26974782007-12-13 12:43:29 -06002216 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
Mike Christie8434aa82006-06-28 12:00:30 -05002217 put_device(&session->dev);
Mike Christie7b8631b2006-01-13 18:05:50 -06002218}
Mike Christie8434aa82006-06-28 12:00:30 -05002219EXPORT_SYMBOL_GPL(iscsi_free_session);
2220
2221/**
2222 * iscsi_destroy_session - destroy iscsi session
2223 * @session: iscsi_session
2224 *
2225 * Can be called by a LLD or iscsi_transport. There must not be
2226 * any running connections.
Rob Landleyeb448202007-11-03 13:30:39 -05002227 */
Mike Christie8434aa82006-06-28 12:00:30 -05002228int iscsi_destroy_session(struct iscsi_cls_session *session)
2229{
2230 iscsi_remove_session(session);
Mike Christie632248a2009-08-20 15:11:01 -05002231 ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
Mike Christie8434aa82006-06-28 12:00:30 -05002232 iscsi_free_session(session);
2233 return 0;
2234}
Mike Christie7b8631b2006-01-13 18:05:50 -06002235EXPORT_SYMBOL_GPL(iscsi_destroy_session);
2236
Mike Christie7b8631b2006-01-13 18:05:50 -06002237/**
2238 * iscsi_create_conn - create iscsi class connection
2239 * @session: iscsi cls session
Mike Christie5d91e202008-05-21 15:54:01 -05002240 * @dd_size: private driver data size
Mike Christie7b8631b2006-01-13 18:05:50 -06002241 * @cid: connection id
2242 *
2243 * This can be called from a LLD or iscsi_transport. The connection
2244 * is child of the session so cid must be unique for all connections
2245 * on the session.
Mike Christieb5c7a122006-04-06 21:13:33 -05002246 *
2247 * Since we do not support MCS, cid will normally be zero. In some cases
2248 * for software iscsi we could be trying to preallocate a connection struct
2249 * in which case there could be two connection structs and cid would be
2250 * non-zero.
Rob Landleyeb448202007-11-03 13:30:39 -05002251 */
Mike Christie7b8631b2006-01-13 18:05:50 -06002252struct iscsi_cls_conn *
Mike Christie5d91e202008-05-21 15:54:01 -05002253iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
Mike Christie7b8631b2006-01-13 18:05:50 -06002254{
2255 struct iscsi_transport *transport = session->transport;
Mike Christie7b8631b2006-01-13 18:05:50 -06002256 struct iscsi_cls_conn *conn;
Mike Christie26974782007-12-13 12:43:29 -06002257 unsigned long flags;
Mike Christie7b8631b2006-01-13 18:05:50 -06002258 int err;
2259
Mike Christie5d91e202008-05-21 15:54:01 -05002260 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
Mike Christie7b8631b2006-01-13 18:05:50 -06002261 if (!conn)
2262 return NULL;
Mike Christie5d91e202008-05-21 15:54:01 -05002263 if (dd_size)
Mike Christie7b8631b2006-01-13 18:05:50 -06002264 conn->dd_data = &conn[1];
2265
Mike Christie22a39fb2011-02-16 15:04:33 -06002266 mutex_init(&conn->ep_mutex);
Mike Christie7b8631b2006-01-13 18:05:50 -06002267 INIT_LIST_HEAD(&conn->conn_list);
2268 conn->transport = transport;
Mike Christieb5c7a122006-04-06 21:13:33 -05002269 conn->cid = cid;
Mike Christie7b8631b2006-01-13 18:05:50 -06002270
2271 /* this is released in the dev's release function */
2272 if (!get_device(&session->dev))
Mike Christie43a145a2006-10-16 18:09:38 -04002273 goto free_conn;
Mike Christieb5c7a122006-04-06 21:13:33 -05002274
Kay Sievers71610f52008-12-03 22:41:36 +01002275 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
Mike Christie7b8631b2006-01-13 18:05:50 -06002276 conn->dev.parent = &session->dev;
2277 conn->dev.release = iscsi_conn_release;
2278 err = device_register(&conn->dev);
2279 if (err) {
Mike Christie322d7392008-01-31 13:36:52 -06002280 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2281 "register connection's dev\n");
Mike Christie7b8631b2006-01-13 18:05:50 -06002282 goto release_parent_ref;
2283 }
2284 transport_register_device(&conn->dev);
Mike Christie26974782007-12-13 12:43:29 -06002285
2286 spin_lock_irqsave(&connlock, flags);
2287 list_add(&conn->conn_list, &connlist);
Mike Christie26974782007-12-13 12:43:29 -06002288 spin_unlock_irqrestore(&connlock, flags);
Mike Christie632248a2009-08-20 15:11:01 -05002289
2290 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
Mike Christie7b8631b2006-01-13 18:05:50 -06002291 return conn;
2292
2293release_parent_ref:
2294 put_device(&session->dev);
2295free_conn:
2296 kfree(conn);
2297 return NULL;
2298}
2299
2300EXPORT_SYMBOL_GPL(iscsi_create_conn);
2301
2302/**
2303 * iscsi_destroy_conn - destroy iscsi class connection
Rob Landleyeb448202007-11-03 13:30:39 -05002304 * @conn: iscsi cls session
Mike Christie7b8631b2006-01-13 18:05:50 -06002305 *
Mike Christie26974782007-12-13 12:43:29 -06002306 * This can be called from a LLD or iscsi_transport.
Rob Landleyeb448202007-11-03 13:30:39 -05002307 */
Mike Christie7b8631b2006-01-13 18:05:50 -06002308int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2309{
Mike Christie26974782007-12-13 12:43:29 -06002310 unsigned long flags;
2311
2312 spin_lock_irqsave(&connlock, flags);
Mike Christie26974782007-12-13 12:43:29 -06002313 list_del(&conn->conn_list);
2314 spin_unlock_irqrestore(&connlock, flags);
2315
Mike Christie7b8631b2006-01-13 18:05:50 -06002316 transport_unregister_device(&conn->dev);
Mike Christie632248a2009-08-20 15:11:01 -05002317 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
Mike Christie7b8631b2006-01-13 18:05:50 -06002318 device_unregister(&conn->dev);
2319 return 0;
2320}
Mike Christie7b8631b2006-01-13 18:05:50 -06002321EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2322
2323/*
Mike Christie7b8631b2006-01-13 18:05:50 -06002324 * iscsi interface functions
2325 */
Alex Aizman0896b752005-08-04 19:33:07 -07002326static struct iscsi_internal *
2327iscsi_if_transport_lookup(struct iscsi_transport *tt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002328{
Alex Aizman0896b752005-08-04 19:33:07 -07002329 struct iscsi_internal *priv;
2330 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331
Alex Aizman0896b752005-08-04 19:33:07 -07002332 spin_lock_irqsave(&iscsi_transport_lock, flags);
2333 list_for_each_entry(priv, &iscsi_transports, list) {
2334 if (tt == priv->iscsi_transport) {
2335 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2336 return priv;
2337 }
2338 }
2339 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2340 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002341}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342
Alex Aizman0896b752005-08-04 19:33:07 -07002343static int
Michael Chan43514772009-06-08 18:14:41 -07002344iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
Mike Christie53cb8a12006-06-28 12:00:32 -05002345{
Michael Chan43514772009-06-08 18:14:41 -07002346 return nlmsg_multicast(nls, skb, 0, group, gfp);
Alex Aizman0896b752005-08-04 19:33:07 -07002347}
2348
Mike Christie7b7232f2006-02-01 21:06:49 -06002349int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
Alex Aizman0896b752005-08-04 19:33:07 -07002350 char *data, uint32_t data_size)
2351{
2352 struct nlmsghdr *nlh;
2353 struct sk_buff *skb;
2354 struct iscsi_uevent *ev;
Alex Aizman0896b752005-08-04 19:33:07 -07002355 char *pdu;
Mike Christie790f39a2006-05-18 20:31:39 -05002356 struct iscsi_internal *priv;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002357 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2358 data_size);
Alex Aizman0896b752005-08-04 19:33:07 -07002359
Mike Christie790f39a2006-05-18 20:31:39 -05002360 priv = iscsi_if_transport_lookup(conn->transport);
2361 if (!priv)
2362 return -EINVAL;
2363
Mike Christie43a145a2006-10-16 18:09:38 -04002364 skb = alloc_skb(len, GFP_ATOMIC);
Alex Aizman0896b752005-08-04 19:33:07 -07002365 if (!skb) {
Mike Christiee5bd7b52008-09-24 11:46:10 -05002366 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
Mike Christie322d7392008-01-31 13:36:52 -06002367 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2368 "control PDU: OOM\n");
Alex Aizman0896b752005-08-04 19:33:07 -07002369 return -ENOMEM;
2370 }
2371
Michael Chan43514772009-06-08 18:14:41 -07002372 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002373 ev = nlmsg_data(nlh);
Alex Aizman0896b752005-08-04 19:33:07 -07002374 memset(ev, 0, sizeof(*ev));
2375 ev->transport_handle = iscsi_handle(conn->transport);
2376 ev->type = ISCSI_KEVENT_RECV_PDU;
Mike Christieb5c7a122006-04-06 21:13:33 -05002377 ev->r.recv_req.cid = conn->cid;
2378 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
Alex Aizman0896b752005-08-04 19:33:07 -07002379 pdu = (char*)ev + sizeof(*ev);
2380 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2381 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2382
Michael Chan43514772009-06-08 18:14:41 -07002383 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
Alex Aizman0896b752005-08-04 19:33:07 -07002384}
2385EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2386
Michael Chan43514772009-06-08 18:14:41 -07002387int iscsi_offload_mesg(struct Scsi_Host *shost,
2388 struct iscsi_transport *transport, uint32_t type,
2389 char *data, uint16_t data_size)
2390{
2391 struct nlmsghdr *nlh;
2392 struct sk_buff *skb;
2393 struct iscsi_uevent *ev;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002394 int len = nlmsg_total_size(sizeof(*ev) + data_size);
Michael Chan43514772009-06-08 18:14:41 -07002395
Michael Chana541f842009-07-29 08:49:52 +00002396 skb = alloc_skb(len, GFP_ATOMIC);
Michael Chan43514772009-06-08 18:14:41 -07002397 if (!skb) {
2398 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2399 return -ENOMEM;
2400 }
2401
2402 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002403 ev = nlmsg_data(nlh);
Michael Chan43514772009-06-08 18:14:41 -07002404 memset(ev, 0, sizeof(*ev));
2405 ev->type = type;
2406 ev->transport_handle = iscsi_handle(transport);
2407 switch (type) {
2408 case ISCSI_KEVENT_PATH_REQ:
2409 ev->r.req_path.host_no = shost->host_no;
2410 break;
2411 case ISCSI_KEVENT_IF_DOWN:
2412 ev->r.notify_if_down.host_no = shost->host_no;
2413 break;
2414 }
2415
2416 memcpy((char *)ev + sizeof(*ev), data, data_size);
2417
Michael Chana541f842009-07-29 08:49:52 +00002418 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
Michael Chan43514772009-06-08 18:14:41 -07002419}
2420EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2421
Mike Christiee5bd7b52008-09-24 11:46:10 -05002422void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
Alex Aizman0896b752005-08-04 19:33:07 -07002423{
2424 struct nlmsghdr *nlh;
2425 struct sk_buff *skb;
2426 struct iscsi_uevent *ev;
Mike Christie790f39a2006-05-18 20:31:39 -05002427 struct iscsi_internal *priv;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002428 int len = nlmsg_total_size(sizeof(*ev));
Alex Aizman0896b752005-08-04 19:33:07 -07002429
Mike Christie790f39a2006-05-18 20:31:39 -05002430 priv = iscsi_if_transport_lookup(conn->transport);
2431 if (!priv)
2432 return;
2433
Mike Christie43a145a2006-10-16 18:09:38 -04002434 skb = alloc_skb(len, GFP_ATOMIC);
Alex Aizman0896b752005-08-04 19:33:07 -07002435 if (!skb) {
Mike Christie322d7392008-01-31 13:36:52 -06002436 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2437 "conn error (%d)\n", error);
Alex Aizman0896b752005-08-04 19:33:07 -07002438 return;
2439 }
2440
Michael Chan43514772009-06-08 18:14:41 -07002441 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002442 ev = nlmsg_data(nlh);
Alex Aizman0896b752005-08-04 19:33:07 -07002443 ev->transport_handle = iscsi_handle(conn->transport);
2444 ev->type = ISCSI_KEVENT_CONN_ERROR;
Alex Aizman0896b752005-08-04 19:33:07 -07002445 ev->r.connerror.error = error;
Mike Christieb5c7a122006-04-06 21:13:33 -05002446 ev->r.connerror.cid = conn->cid;
2447 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
Alex Aizman0896b752005-08-04 19:33:07 -07002448
Michael Chan43514772009-06-08 18:14:41 -07002449 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
Alex Aizman0896b752005-08-04 19:33:07 -07002450
Mike Christie322d7392008-01-31 13:36:52 -06002451 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2452 error);
Alex Aizman0896b752005-08-04 19:33:07 -07002453}
Mike Christiee5bd7b52008-09-24 11:46:10 -05002454EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
Alex Aizman0896b752005-08-04 19:33:07 -07002455
Manish Rangankar17fa5752011-07-25 13:48:52 -05002456void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2457 enum iscsi_conn_state state)
2458{
2459 struct nlmsghdr *nlh;
2460 struct sk_buff *skb;
2461 struct iscsi_uevent *ev;
2462 struct iscsi_internal *priv;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002463 int len = nlmsg_total_size(sizeof(*ev));
Manish Rangankar17fa5752011-07-25 13:48:52 -05002464
2465 priv = iscsi_if_transport_lookup(conn->transport);
2466 if (!priv)
2467 return;
2468
2469 skb = alloc_skb(len, GFP_ATOMIC);
2470 if (!skb) {
2471 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2472 "conn login (%d)\n", state);
2473 return;
2474 }
2475
2476 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002477 ev = nlmsg_data(nlh);
Manish Rangankar17fa5752011-07-25 13:48:52 -05002478 ev->transport_handle = iscsi_handle(conn->transport);
2479 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2480 ev->r.conn_login.state = state;
2481 ev->r.conn_login.cid = conn->cid;
2482 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2483 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2484
2485 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2486 state);
2487}
2488EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2489
Vikas Chaudharya11e2542012-02-13 18:30:46 +05302490void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2491 enum iscsi_host_event_code code, uint32_t data_size,
2492 uint8_t *data)
2493{
2494 struct nlmsghdr *nlh;
2495 struct sk_buff *skb;
2496 struct iscsi_uevent *ev;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002497 int len = nlmsg_total_size(sizeof(*ev) + data_size);
Vikas Chaudharya11e2542012-02-13 18:30:46 +05302498
Mike Christie49d0e642012-03-06 16:09:01 -06002499 skb = alloc_skb(len, GFP_NOIO);
Vikas Chaudharya11e2542012-02-13 18:30:46 +05302500 if (!skb) {
2501 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2502 host_no, code);
2503 return;
2504 }
2505
2506 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002507 ev = nlmsg_data(nlh);
Vikas Chaudharya11e2542012-02-13 18:30:46 +05302508 ev->transport_handle = iscsi_handle(transport);
2509 ev->type = ISCSI_KEVENT_HOST_EVENT;
2510 ev->r.host_event.host_no = host_no;
2511 ev->r.host_event.code = code;
2512 ev->r.host_event.data_size = data_size;
2513
2514 if (data_size)
2515 memcpy((char *)ev + sizeof(*ev), data, data_size);
2516
Mike Christie49d0e642012-03-06 16:09:01 -06002517 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
Vikas Chaudharya11e2542012-02-13 18:30:46 +05302518}
2519EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2520
Vikas Chaudharyac20c7b2012-02-13 18:30:48 +05302521void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2522 uint32_t status, uint32_t pid, uint32_t data_size,
2523 uint8_t *data)
2524{
2525 struct nlmsghdr *nlh;
2526 struct sk_buff *skb;
2527 struct iscsi_uevent *ev;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002528 int len = nlmsg_total_size(sizeof(*ev) + data_size);
Vikas Chaudharyac20c7b2012-02-13 18:30:48 +05302529
Mike Christie49d0e642012-03-06 16:09:01 -06002530 skb = alloc_skb(len, GFP_NOIO);
Vikas Chaudharyac20c7b2012-02-13 18:30:48 +05302531 if (!skb) {
2532 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2533 return;
2534 }
2535
2536 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002537 ev = nlmsg_data(nlh);
Vikas Chaudharyac20c7b2012-02-13 18:30:48 +05302538 ev->transport_handle = iscsi_handle(transport);
2539 ev->type = ISCSI_KEVENT_PING_COMP;
2540 ev->r.ping_comp.host_no = host_no;
2541 ev->r.ping_comp.status = status;
2542 ev->r.ping_comp.pid = pid;
2543 ev->r.ping_comp.data_size = data_size;
2544 memcpy((char *)ev + sizeof(*ev), data, data_size);
2545
Mike Christie49d0e642012-03-06 16:09:01 -06002546 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
Vikas Chaudharyac20c7b2012-02-13 18:30:48 +05302547}
2548EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2549
Alex Aizman0896b752005-08-04 19:33:07 -07002550static int
Michael Chan43514772009-06-08 18:14:41 -07002551iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
2552 void *payload, int size)
Alex Aizman0896b752005-08-04 19:33:07 -07002553{
2554 struct sk_buff *skb;
2555 struct nlmsghdr *nlh;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002556 int len = nlmsg_total_size(size);
Alex Aizman0896b752005-08-04 19:33:07 -07002557 int flags = multi ? NLM_F_MULTI : 0;
2558 int t = done ? NLMSG_DONE : type;
2559
Mike Christie43a145a2006-10-16 18:09:38 -04002560 skb = alloc_skb(len, GFP_ATOMIC);
Mike Christie239a7dc2007-05-30 12:57:07 -05002561 if (!skb) {
2562 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2563 return -ENOMEM;
2564 }
Alex Aizman0896b752005-08-04 19:33:07 -07002565
Michael Chan43514772009-06-08 18:14:41 -07002566 nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
Alex Aizman0896b752005-08-04 19:33:07 -07002567 nlh->nlmsg_flags = flags;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002568 memcpy(nlmsg_data(nlh), payload, size);
Michael Chan43514772009-06-08 18:14:41 -07002569 return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
Alex Aizman0896b752005-08-04 19:33:07 -07002570}
2571
2572static int
Mike Christie5b940ad2006-02-01 21:06:56 -06002573iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
Alex Aizman0896b752005-08-04 19:33:07 -07002574{
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002575 struct iscsi_uevent *ev = nlmsg_data(nlh);
Alex Aizman0896b752005-08-04 19:33:07 -07002576 struct iscsi_stats *stats;
2577 struct sk_buff *skbstat;
Mike Christie7b8631b2006-01-13 18:05:50 -06002578 struct iscsi_cls_conn *conn;
Alex Aizman0896b752005-08-04 19:33:07 -07002579 struct nlmsghdr *nlhstat;
2580 struct iscsi_uevent *evstat;
Mike Christie790f39a2006-05-18 20:31:39 -05002581 struct iscsi_internal *priv;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002582 int len = nlmsg_total_size(sizeof(*ev) +
2583 sizeof(struct iscsi_stats) +
2584 sizeof(struct iscsi_stats_custom) *
2585 ISCSI_STATS_CUSTOM_MAX);
Alex Aizman0896b752005-08-04 19:33:07 -07002586 int err = 0;
2587
Mike Christie790f39a2006-05-18 20:31:39 -05002588 priv = iscsi_if_transport_lookup(transport);
2589 if (!priv)
2590 return -EINVAL;
2591
Mike Christieb5c7a122006-04-06 21:13:33 -05002592 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
Alex Aizman0896b752005-08-04 19:33:07 -07002593 if (!conn)
2594 return -EEXIST;
2595
2596 do {
2597 int actual_size;
2598
Mike Christie43a145a2006-10-16 18:09:38 -04002599 skbstat = alloc_skb(len, GFP_ATOMIC);
Alex Aizman0896b752005-08-04 19:33:07 -07002600 if (!skbstat) {
Mike Christie322d7392008-01-31 13:36:52 -06002601 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2602 "deliver stats: OOM\n");
Alex Aizman0896b752005-08-04 19:33:07 -07002603 return -ENOMEM;
2604 }
2605
Michael Chan43514772009-06-08 18:14:41 -07002606 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
Alex Aizman0896b752005-08-04 19:33:07 -07002607 (len - sizeof(*nlhstat)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002608 evstat = nlmsg_data(nlhstat);
Alex Aizman0896b752005-08-04 19:33:07 -07002609 memset(evstat, 0, sizeof(*evstat));
2610 evstat->transport_handle = iscsi_handle(conn->transport);
2611 evstat->type = nlh->nlmsg_type;
Mike Christieb5c7a122006-04-06 21:13:33 -05002612 evstat->u.get_stats.cid =
2613 ev->u.get_stats.cid;
2614 evstat->u.get_stats.sid =
2615 ev->u.get_stats.sid;
Alex Aizman0896b752005-08-04 19:33:07 -07002616 stats = (struct iscsi_stats *)
2617 ((char*)evstat + sizeof(*evstat));
2618 memset(stats, 0, sizeof(*stats));
2619
Mike Christie7b7232f2006-02-01 21:06:49 -06002620 transport->get_stats(conn, stats);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002621 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2622 sizeof(struct iscsi_stats) +
2623 sizeof(struct iscsi_stats_custom) *
2624 stats->custom_length);
Alex Aizman0896b752005-08-04 19:33:07 -07002625 actual_size -= sizeof(*nlhstat);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002626 actual_size = nlmsg_msg_size(actual_size);
Mike Christie5b940ad2006-02-01 21:06:56 -06002627 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
Alex Aizman0896b752005-08-04 19:33:07 -07002628 nlhstat->nlmsg_len = actual_size;
2629
Michael Chan43514772009-06-08 18:14:41 -07002630 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2631 GFP_ATOMIC);
Alex Aizman0896b752005-08-04 19:33:07 -07002632 } while (err < 0 && err != -ECONNREFUSED);
2633
2634 return err;
2635}
2636
Mike Christie53cb8a12006-06-28 12:00:32 -05002637/**
Mike Christie26974782007-12-13 12:43:29 -06002638 * iscsi_session_event - send session destr. completion event
2639 * @session: iscsi class session
2640 * @event: type of event
Rob Landleyeb448202007-11-03 13:30:39 -05002641 */
Mike Christie26974782007-12-13 12:43:29 -06002642int iscsi_session_event(struct iscsi_cls_session *session,
2643 enum iscsi_uevent_e event)
Mike Christie53cb8a12006-06-28 12:00:32 -05002644{
2645 struct iscsi_internal *priv;
Mike Christie53cb8a12006-06-28 12:00:32 -05002646 struct Scsi_Host *shost;
2647 struct iscsi_uevent *ev;
2648 struct sk_buff *skb;
2649 struct nlmsghdr *nlh;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002650 int rc, len = nlmsg_total_size(sizeof(*ev));
Mike Christie53cb8a12006-06-28 12:00:32 -05002651
Mike Christie26974782007-12-13 12:43:29 -06002652 priv = iscsi_if_transport_lookup(session->transport);
Mike Christie53cb8a12006-06-28 12:00:32 -05002653 if (!priv)
2654 return -EINVAL;
Mike Christie53cb8a12006-06-28 12:00:32 -05002655 shost = iscsi_session_to_shost(session);
2656
Mike Christie43a145a2006-10-16 18:09:38 -04002657 skb = alloc_skb(len, GFP_KERNEL);
Mike Christie53cb8a12006-06-28 12:00:32 -05002658 if (!skb) {
Mike Christie322d7392008-01-31 13:36:52 -06002659 iscsi_cls_session_printk(KERN_ERR, session,
2660 "Cannot notify userspace of session "
2661 "event %u\n", event);
Mike Christie53cb8a12006-06-28 12:00:32 -05002662 return -ENOMEM;
2663 }
2664
Michael Chan43514772009-06-08 18:14:41 -07002665 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00002666 ev = nlmsg_data(nlh);
Mike Christie26974782007-12-13 12:43:29 -06002667 ev->transport_handle = iscsi_handle(session->transport);
2668
2669 ev->type = event;
2670 switch (event) {
2671 case ISCSI_KEVENT_DESTROY_SESSION:
2672 ev->r.d_session.host_no = shost->host_no;
2673 ev->r.d_session.sid = session->sid;
2674 break;
2675 case ISCSI_KEVENT_CREATE_SESSION:
2676 ev->r.c_session_ret.host_no = shost->host_no;
2677 ev->r.c_session_ret.sid = session->sid;
2678 break;
2679 case ISCSI_KEVENT_UNBIND_SESSION:
2680 ev->r.unbind_session.host_no = shost->host_no;
2681 ev->r.unbind_session.sid = session->sid;
2682 break;
2683 default:
Mike Christie322d7392008-01-31 13:36:52 -06002684 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2685 "%u.\n", event);
Mike Christie26974782007-12-13 12:43:29 -06002686 kfree_skb(skb);
2687 return -EINVAL;
2688 }
Mike Christie53cb8a12006-06-28 12:00:32 -05002689
2690 /*
2691 * this will occur if the daemon is not up, so we just warn
2692 * the user and when the daemon is restarted it will handle it
2693 */
Michael Chan43514772009-06-08 18:14:41 -07002694 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
Pablo Neira Ayusoff491a72009-02-05 23:56:36 -08002695 if (rc == -ESRCH)
Mike Christie322d7392008-01-31 13:36:52 -06002696 iscsi_cls_session_printk(KERN_ERR, session,
2697 "Cannot notify userspace of session "
2698 "event %u. Check iscsi daemon\n",
2699 event);
Mike Christie632248a2009-08-20 15:11:01 -05002700
2701 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2702 event, rc);
Mike Christie53cb8a12006-06-28 12:00:32 -05002703 return rc;
2704}
Mike Christie26974782007-12-13 12:43:29 -06002705EXPORT_SYMBOL_GPL(iscsi_session_event);
Mike Christie53cb8a12006-06-28 12:00:32 -05002706
Alex Aizman0896b752005-08-04 19:33:07 -07002707static int
Mike Christied82ff9be2008-05-21 15:54:13 -05002708iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
Mike Christie0c70d842011-12-05 16:44:01 -06002709 struct iscsi_uevent *ev, pid_t pid,
2710 uint32_t initial_cmdsn, uint16_t cmds_max,
2711 uint16_t queue_depth)
Mike Christie7b8631b2006-01-13 18:05:50 -06002712{
2713 struct iscsi_transport *transport = priv->iscsi_transport;
Mike Christie7b7232f2006-02-01 21:06:49 -06002714 struct iscsi_cls_session *session;
Mike Christie5e7facb2009-03-05 14:46:06 -06002715 struct Scsi_Host *shost;
Mike Christie7b8631b2006-01-13 18:05:50 -06002716
Mike Christied82ff9be2008-05-21 15:54:13 -05002717 session = transport->create_session(ep, cmds_max, queue_depth,
Mike Christie5e7facb2009-03-05 14:46:06 -06002718 initial_cmdsn);
Mike Christie7b7232f2006-02-01 21:06:49 -06002719 if (!session)
Mike Christie7b8631b2006-01-13 18:05:50 -06002720 return -ENOMEM;
2721
Mike Christie0c70d842011-12-05 16:44:01 -06002722 session->creator = pid;
Mike Christie5e7facb2009-03-05 14:46:06 -06002723 shost = iscsi_session_to_shost(session);
2724 ev->r.c_session_ret.host_no = shost->host_no;
Mike Christieb5c7a122006-04-06 21:13:33 -05002725 ev->r.c_session_ret.sid = session->sid;
Mike Christie632248a2009-08-20 15:11:01 -05002726 ISCSI_DBG_TRANS_SESSION(session,
2727 "Completed creating transport session\n");
Mike Christie7b8631b2006-01-13 18:05:50 -06002728 return 0;
2729}
2730
2731static int
Mike Christie7b7232f2006-02-01 21:06:49 -06002732iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
Mike Christie7b8631b2006-01-13 18:05:50 -06002733{
Mike Christie7b8631b2006-01-13 18:05:50 -06002734 struct iscsi_cls_conn *conn;
Mike Christie7b7232f2006-02-01 21:06:49 -06002735 struct iscsi_cls_session *session;
Mike Christie7b8631b2006-01-13 18:05:50 -06002736
Mike Christieb5c7a122006-04-06 21:13:33 -05002737 session = iscsi_session_lookup(ev->u.c_conn.sid);
2738 if (!session) {
Mike Christie322d7392008-01-31 13:36:52 -06002739 printk(KERN_ERR "iscsi: invalid session %d.\n",
Mike Christieb5c7a122006-04-06 21:13:33 -05002740 ev->u.c_conn.sid);
Mike Christie7b8631b2006-01-13 18:05:50 -06002741 return -EINVAL;
Mike Christieb5c7a122006-04-06 21:13:33 -05002742 }
Mike Christie7b8631b2006-01-13 18:05:50 -06002743
Mike Christie7b7232f2006-02-01 21:06:49 -06002744 conn = transport->create_conn(session, ev->u.c_conn.cid);
Mike Christieb5c7a122006-04-06 21:13:33 -05002745 if (!conn) {
Mike Christie322d7392008-01-31 13:36:52 -06002746 iscsi_cls_session_printk(KERN_ERR, session,
2747 "couldn't create a new connection.");
Mike Christie7b7232f2006-02-01 21:06:49 -06002748 return -ENOMEM;
Mike Christieb5c7a122006-04-06 21:13:33 -05002749 }
Mike Christie7b8631b2006-01-13 18:05:50 -06002750
Mike Christieb5c7a122006-04-06 21:13:33 -05002751 ev->r.c_conn_ret.sid = session->sid;
2752 ev->r.c_conn_ret.cid = conn->cid;
Mike Christie632248a2009-08-20 15:11:01 -05002753
2754 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
Mike Christie7b8631b2006-01-13 18:05:50 -06002755 return 0;
Mike Christie7b8631b2006-01-13 18:05:50 -06002756}
2757
2758static int
2759iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2760{
Mike Christie7b8631b2006-01-13 18:05:50 -06002761 struct iscsi_cls_conn *conn;
Mike Christie7b8631b2006-01-13 18:05:50 -06002762
Mike Christieb5c7a122006-04-06 21:13:33 -05002763 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
Mike Christie7b8631b2006-01-13 18:05:50 -06002764 if (!conn)
Mike Christie7b8631b2006-01-13 18:05:50 -06002765 return -EINVAL;
Mike Christie7b8631b2006-01-13 18:05:50 -06002766
Mike Christie632248a2009-08-20 15:11:01 -05002767 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
Mike Christie7b8631b2006-01-13 18:05:50 -06002768 if (transport->destroy_conn)
2769 transport->destroy_conn(conn);
Mike Christie632248a2009-08-20 15:11:01 -05002770
Mike Christie7b8631b2006-01-13 18:05:50 -06002771 return 0;
2772}
2773
Mike Christiefd7255f2006-04-06 21:13:36 -05002774static int
2775iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2776{
2777 char *data = (char*)ev + sizeof(*ev);
2778 struct iscsi_cls_conn *conn;
2779 struct iscsi_cls_session *session;
Mike Christiea54a52c2006-06-28 12:00:23 -05002780 int err = 0, value = 0;
Mike Christiefd7255f2006-04-06 21:13:36 -05002781
2782 session = iscsi_session_lookup(ev->u.set_param.sid);
2783 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2784 if (!conn || !session)
2785 return -EINVAL;
2786
2787 switch (ev->u.set_param.param) {
Mike Christie30a6c652006-04-06 21:13:39 -05002788 case ISCSI_PARAM_SESS_RECOVERY_TMO:
Mike Christiea54a52c2006-06-28 12:00:23 -05002789 sscanf(data, "%d", &value);
Chris Leech9c8108a2015-06-16 16:07:13 -07002790 if (!session->recovery_tmo_sysfs_override)
2791 session->recovery_tmo = value;
Mike Christie30a6c652006-04-06 21:13:39 -05002792 break;
Mike Christiefd7255f2006-04-06 21:13:36 -05002793 default:
Mike Christiea54a52c2006-06-28 12:00:23 -05002794 err = transport->set_param(conn, ev->u.set_param.param,
2795 data, ev->u.set_param.len);
Mike Christiefd7255f2006-04-06 21:13:36 -05002796 }
2797
2798 return err;
2799}
2800
Mike Christie10eb0f02009-05-13 17:57:38 -05002801static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2802 struct iscsi_uevent *ev, int msg_type)
2803{
2804 struct iscsi_endpoint *ep;
2805 struct sockaddr *dst_addr;
2806 struct Scsi_Host *shost = NULL;
2807 int non_blocking, err = 0;
2808
2809 if (!transport->ep_connect)
2810 return -EINVAL;
2811
2812 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2813 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2814 if (!shost) {
2815 printk(KERN_ERR "ep connect failed. Could not find "
2816 "host no %u\n",
2817 ev->u.ep_connect_through_host.host_no);
2818 return -ENODEV;
2819 }
2820 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2821 } else
2822 non_blocking = ev->u.ep_connect.non_blocking;
2823
2824 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2825 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2826 if (IS_ERR(ep)) {
2827 err = PTR_ERR(ep);
2828 goto release_host;
2829 }
2830
2831 ev->r.ep_connect_ret.handle = ep->id;
2832release_host:
2833 if (shost)
2834 scsi_host_put(shost);
2835 return err;
2836}
2837
Mike Christie22a39fb2011-02-16 15:04:33 -06002838static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2839 u64 ep_handle)
2840{
2841 struct iscsi_cls_conn *conn;
2842 struct iscsi_endpoint *ep;
2843
2844 if (!transport->ep_disconnect)
2845 return -EINVAL;
2846
2847 ep = iscsi_lookup_endpoint(ep_handle);
2848 if (!ep)
2849 return -EINVAL;
2850 conn = ep->conn;
2851 if (conn) {
2852 mutex_lock(&conn->ep_mutex);
2853 conn->ep = NULL;
2854 mutex_unlock(&conn->ep_mutex);
2855 }
2856
2857 transport->ep_disconnect(ep);
2858 return 0;
2859}
2860
Mike Christie7b8631b2006-01-13 18:05:50 -06002861static int
Or Gerlitz264faaa2006-05-02 19:46:36 -05002862iscsi_if_transport_ep(struct iscsi_transport *transport,
2863 struct iscsi_uevent *ev, int msg_type)
2864{
Mike Christied82ff9be2008-05-21 15:54:13 -05002865 struct iscsi_endpoint *ep;
Or Gerlitz264faaa2006-05-02 19:46:36 -05002866 int rc = 0;
2867
2868 switch (msg_type) {
Mike Christie10eb0f02009-05-13 17:57:38 -05002869 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
Or Gerlitz264faaa2006-05-02 19:46:36 -05002870 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
Mike Christie10eb0f02009-05-13 17:57:38 -05002871 rc = iscsi_if_ep_connect(transport, ev, msg_type);
Or Gerlitz264faaa2006-05-02 19:46:36 -05002872 break;
2873 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2874 if (!transport->ep_poll)
2875 return -EINVAL;
2876
Mike Christied82ff9be2008-05-21 15:54:13 -05002877 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2878 if (!ep)
2879 return -EINVAL;
2880
2881 ev->r.retcode = transport->ep_poll(ep,
Or Gerlitz264faaa2006-05-02 19:46:36 -05002882 ev->u.ep_poll.timeout_ms);
2883 break;
2884 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
Mike Christie22a39fb2011-02-16 15:04:33 -06002885 rc = iscsi_if_ep_disconnect(transport,
2886 ev->u.ep_disconnect.ep_handle);
Or Gerlitz264faaa2006-05-02 19:46:36 -05002887 break;
2888 }
2889 return rc;
2890}
2891
2892static int
Mike Christie01cb2252006-06-28 12:00:22 -05002893iscsi_tgt_dscvr(struct iscsi_transport *transport,
2894 struct iscsi_uevent *ev)
2895{
Mike Christie2174a042007-05-30 12:57:10 -05002896 struct Scsi_Host *shost;
Mike Christie01cb2252006-06-28 12:00:22 -05002897 struct sockaddr *dst_addr;
Mike Christie2174a042007-05-30 12:57:10 -05002898 int err;
Mike Christie01cb2252006-06-28 12:00:22 -05002899
2900 if (!transport->tgt_dscvr)
2901 return -EINVAL;
2902
Mike Christie2174a042007-05-30 12:57:10 -05002903 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
James Smart315cb0a2008-08-07 20:49:30 -04002904 if (!shost) {
Mike Christie2174a042007-05-30 12:57:10 -05002905 printk(KERN_ERR "target discovery could not find host no %u\n",
2906 ev->u.tgt_dscvr.host_no);
2907 return -ENODEV;
2908 }
2909
2910
Mike Christie01cb2252006-06-28 12:00:22 -05002911 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
Mike Christie2174a042007-05-30 12:57:10 -05002912 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2913 ev->u.tgt_dscvr.enable, dst_addr);
2914 scsi_host_put(shost);
2915 return err;
Mike Christie01cb2252006-06-28 12:00:22 -05002916}
2917
2918static int
Mike Christie1d9bf132007-05-30 12:57:11 -05002919iscsi_set_host_param(struct iscsi_transport *transport,
2920 struct iscsi_uevent *ev)
2921{
2922 char *data = (char*)ev + sizeof(*ev);
2923 struct Scsi_Host *shost;
2924 int err;
2925
2926 if (!transport->set_host_param)
2927 return -ENOSYS;
2928
2929 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
James Smart315cb0a2008-08-07 20:49:30 -04002930 if (!shost) {
Mike Christie1d9bf132007-05-30 12:57:11 -05002931 printk(KERN_ERR "set_host_param could not find host no %u\n",
2932 ev->u.set_host_param.host_no);
2933 return -ENODEV;
2934 }
2935
2936 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2937 data, ev->u.set_host_param.len);
2938 scsi_host_put(shost);
2939 return err;
2940}
2941
2942static int
Michael Chan43514772009-06-08 18:14:41 -07002943iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2944{
2945 struct Scsi_Host *shost;
2946 struct iscsi_path *params;
2947 int err;
2948
2949 if (!transport->set_path)
2950 return -ENOSYS;
2951
2952 shost = scsi_host_lookup(ev->u.set_path.host_no);
2953 if (!shost) {
2954 printk(KERN_ERR "set path could not find host no %u\n",
2955 ev->u.set_path.host_no);
2956 return -ENODEV;
2957 }
2958
2959 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2960 err = transport->set_path(shost, params);
2961
2962 scsi_host_put(shost);
2963 return err;
2964}
2965
2966static int
Mike Christie56c155b2011-07-25 13:48:37 -05002967iscsi_set_iface_params(struct iscsi_transport *transport,
Mike Christie00c31882011-10-06 03:56:59 -05002968 struct iscsi_uevent *ev, uint32_t len)
Mike Christie56c155b2011-07-25 13:48:37 -05002969{
2970 char *data = (char *)ev + sizeof(*ev);
2971 struct Scsi_Host *shost;
2972 int err;
2973
2974 if (!transport->set_iface_param)
2975 return -ENOSYS;
2976
2977 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2978 if (!shost) {
2979 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2980 ev->u.set_iface_params.host_no);
2981 return -ENODEV;
2982 }
2983
Mike Christie00c31882011-10-06 03:56:59 -05002984 err = transport->set_iface_param(shost, data, len);
Mike Christie56c155b2011-07-25 13:48:37 -05002985 scsi_host_put(shost);
2986 return err;
2987}
2988
2989static int
Vikas Chaudharyac20c7b2012-02-13 18:30:48 +05302990iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2991{
2992 struct Scsi_Host *shost;
2993 struct sockaddr *dst_addr;
2994 int err;
2995
2996 if (!transport->send_ping)
2997 return -ENOSYS;
2998
2999 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
3000 if (!shost) {
3001 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
3002 ev->u.iscsi_ping.host_no);
3003 return -ENODEV;
3004 }
3005
3006 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3007 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3008 ev->u.iscsi_ping.iface_type,
3009 ev->u.iscsi_ping.payload_size,
3010 ev->u.iscsi_ping.pid,
3011 dst_addr);
3012 scsi_host_put(shost);
3013 return err;
3014}
3015
3016static int
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003017iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3018{
Hong zhi guoe07ebea2013-03-27 06:53:15 +00003019 struct iscsi_uevent *ev = nlmsg_data(nlh);
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003020 struct Scsi_Host *shost = NULL;
3021 struct iscsi_chap_rec *chap_rec;
3022 struct iscsi_internal *priv;
3023 struct sk_buff *skbchap;
3024 struct nlmsghdr *nlhchap;
3025 struct iscsi_uevent *evchap;
3026 uint32_t chap_buf_size;
3027 int len, err = 0;
3028 char *buf;
3029
3030 if (!transport->get_chap)
3031 return -EINVAL;
3032
3033 priv = iscsi_if_transport_lookup(transport);
3034 if (!priv)
3035 return -EINVAL;
3036
3037 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
Hong zhi guoe07ebea2013-03-27 06:53:15 +00003038 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003039
3040 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3041 if (!shost) {
Masanari Iida804ff602015-05-07 23:21:27 +09003042 printk(KERN_ERR "%s: failed. Could not find host no %u\n",
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003043 __func__, ev->u.get_chap.host_no);
3044 return -ENODEV;
3045 }
3046
3047 do {
3048 int actual_size;
3049
3050 skbchap = alloc_skb(len, GFP_KERNEL);
3051 if (!skbchap) {
3052 printk(KERN_ERR "can not deliver chap: OOM\n");
3053 err = -ENOMEM;
3054 goto exit_get_chap;
3055 }
3056
3057 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3058 (len - sizeof(*nlhchap)), 0);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00003059 evchap = nlmsg_data(nlhchap);
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003060 memset(evchap, 0, sizeof(*evchap));
3061 evchap->transport_handle = iscsi_handle(transport);
3062 evchap->type = nlh->nlmsg_type;
3063 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3064 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3065 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
Nick Black' via open-iscsia799cb72014-07-01 11:24:37 -05003066 buf = (char *)evchap + sizeof(*evchap);
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003067 memset(buf, 0, chap_buf_size);
3068
3069 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3070 &evchap->u.get_chap.num_entries, buf);
3071
Hong zhi guoe07ebea2013-03-27 06:53:15 +00003072 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003073 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3074 nlhchap->nlmsg_len = actual_size;
3075
3076 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3077 GFP_KERNEL);
3078 } while (err < 0 && err != -ECONNREFUSED);
3079
3080exit_get_chap:
3081 scsi_host_put(shost);
3082 return err;
3083}
3084
Adheer Chandravanshi3af142f2013-09-17 07:54:48 -04003085static int iscsi_set_chap(struct iscsi_transport *transport,
3086 struct iscsi_uevent *ev, uint32_t len)
3087{
3088 char *data = (char *)ev + sizeof(*ev);
3089 struct Scsi_Host *shost;
3090 int err = 0;
3091
3092 if (!transport->set_chap)
3093 return -ENOSYS;
3094
3095 shost = scsi_host_lookup(ev->u.set_path.host_no);
3096 if (!shost) {
3097 pr_err("%s could not find host no %u\n",
3098 __func__, ev->u.set_path.host_no);
3099 return -ENODEV;
3100 }
3101
3102 err = transport->set_chap(shost, data, len);
3103 scsi_host_put(shost);
3104 return err;
3105}
3106
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003107static int iscsi_delete_chap(struct iscsi_transport *transport,
3108 struct iscsi_uevent *ev)
3109{
3110 struct Scsi_Host *shost;
3111 int err = 0;
3112
3113 if (!transport->delete_chap)
3114 return -ENOSYS;
3115
3116 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3117 if (!shost) {
3118 printk(KERN_ERR "%s could not find host no %u\n",
3119 __func__, ev->u.delete_chap.host_no);
3120 return -ENODEV;
3121 }
3122
3123 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3124 scsi_host_put(shost);
3125 return err;
3126}
3127
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003128static const struct {
3129 enum iscsi_discovery_parent_type value;
3130 char *name;
3131} iscsi_discovery_parent_names[] = {
3132 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3133 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3134 {ISCSI_DISC_PARENT_ISNS, "isns" },
3135};
3136
3137char *iscsi_get_discovery_parent_name(int parent_type)
3138{
3139 int i;
3140 char *state = "Unknown!";
3141
3142 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3143 if (iscsi_discovery_parent_names[i].value & parent_type) {
3144 state = iscsi_discovery_parent_names[i].name;
3145 break;
3146 }
3147 }
3148 return state;
3149}
3150EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3151
3152static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3153 struct iscsi_uevent *ev, uint32_t len)
3154{
3155 char *data = (char *)ev + sizeof(*ev);
3156 struct Scsi_Host *shost;
3157 struct iscsi_bus_flash_session *fnode_sess;
3158 struct iscsi_bus_flash_conn *fnode_conn;
3159 struct device *dev;
Mike Christie8526cb12013-05-06 12:06:56 -05003160 uint32_t idx;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003161 int err = 0;
3162
3163 if (!transport->set_flashnode_param) {
3164 err = -ENOSYS;
3165 goto exit_set_fnode;
3166 }
3167
3168 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3169 if (!shost) {
3170 pr_err("%s could not find host no %u\n",
3171 __func__, ev->u.set_flashnode.host_no);
3172 err = -ENODEV;
3173 goto put_host;
3174 }
3175
Mike Christie8526cb12013-05-06 12:06:56 -05003176 idx = ev->u.set_flashnode.flashnode_idx;
3177 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003178 if (!fnode_sess) {
3179 pr_err("%s could not find flashnode %u for host no %u\n",
Mike Christie8526cb12013-05-06 12:06:56 -05003180 __func__, idx, ev->u.set_flashnode.host_no);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003181 err = -ENODEV;
3182 goto put_host;
3183 }
3184
Mike Christie8526cb12013-05-06 12:06:56 -05003185 dev = iscsi_find_flashnode_conn(fnode_sess);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003186 if (!dev) {
3187 err = -ENODEV;
Mike Christie8526cb12013-05-06 12:06:56 -05003188 goto put_sess;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003189 }
3190
3191 fnode_conn = iscsi_dev_to_flash_conn(dev);
3192 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
Mike Christie8526cb12013-05-06 12:06:56 -05003193 put_device(dev);
3194
3195put_sess:
3196 put_device(&fnode_sess->dev);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003197
3198put_host:
3199 scsi_host_put(shost);
3200
3201exit_set_fnode:
3202 return err;
3203}
3204
3205static int iscsi_new_flashnode(struct iscsi_transport *transport,
3206 struct iscsi_uevent *ev, uint32_t len)
3207{
3208 char *data = (char *)ev + sizeof(*ev);
3209 struct Scsi_Host *shost;
3210 int index;
3211 int err = 0;
3212
3213 if (!transport->new_flashnode) {
3214 err = -ENOSYS;
3215 goto exit_new_fnode;
3216 }
3217
3218 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3219 if (!shost) {
3220 pr_err("%s could not find host no %u\n",
3221 __func__, ev->u.new_flashnode.host_no);
3222 err = -ENODEV;
3223 goto put_host;
3224 }
3225
3226 index = transport->new_flashnode(shost, data, len);
3227
3228 if (index >= 0)
3229 ev->r.new_flashnode_ret.flashnode_idx = index;
3230 else
3231 err = -EIO;
3232
3233put_host:
3234 scsi_host_put(shost);
3235
3236exit_new_fnode:
3237 return err;
3238}
3239
3240static int iscsi_del_flashnode(struct iscsi_transport *transport,
3241 struct iscsi_uevent *ev)
3242{
3243 struct Scsi_Host *shost;
3244 struct iscsi_bus_flash_session *fnode_sess;
Mike Christie8526cb12013-05-06 12:06:56 -05003245 uint32_t idx;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003246 int err = 0;
3247
3248 if (!transport->del_flashnode) {
3249 err = -ENOSYS;
3250 goto exit_del_fnode;
3251 }
3252
3253 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3254 if (!shost) {
3255 pr_err("%s could not find host no %u\n",
3256 __func__, ev->u.del_flashnode.host_no);
3257 err = -ENODEV;
3258 goto put_host;
3259 }
3260
Mike Christie8526cb12013-05-06 12:06:56 -05003261 idx = ev->u.del_flashnode.flashnode_idx;
3262 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003263 if (!fnode_sess) {
3264 pr_err("%s could not find flashnode %u for host no %u\n",
Mike Christie8526cb12013-05-06 12:06:56 -05003265 __func__, idx, ev->u.del_flashnode.host_no);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003266 err = -ENODEV;
3267 goto put_host;
3268 }
3269
3270 err = transport->del_flashnode(fnode_sess);
Mike Christie8526cb12013-05-06 12:06:56 -05003271 put_device(&fnode_sess->dev);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003272
3273put_host:
3274 scsi_host_put(shost);
3275
3276exit_del_fnode:
3277 return err;
3278}
3279
3280static int iscsi_login_flashnode(struct iscsi_transport *transport,
3281 struct iscsi_uevent *ev)
3282{
3283 struct Scsi_Host *shost;
3284 struct iscsi_bus_flash_session *fnode_sess;
3285 struct iscsi_bus_flash_conn *fnode_conn;
3286 struct device *dev;
Mike Christie8526cb12013-05-06 12:06:56 -05003287 uint32_t idx;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003288 int err = 0;
3289
3290 if (!transport->login_flashnode) {
3291 err = -ENOSYS;
3292 goto exit_login_fnode;
3293 }
3294
3295 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3296 if (!shost) {
3297 pr_err("%s could not find host no %u\n",
3298 __func__, ev->u.login_flashnode.host_no);
3299 err = -ENODEV;
3300 goto put_host;
3301 }
3302
Mike Christie8526cb12013-05-06 12:06:56 -05003303 idx = ev->u.login_flashnode.flashnode_idx;
3304 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003305 if (!fnode_sess) {
3306 pr_err("%s could not find flashnode %u for host no %u\n",
Mike Christie8526cb12013-05-06 12:06:56 -05003307 __func__, idx, ev->u.login_flashnode.host_no);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003308 err = -ENODEV;
3309 goto put_host;
3310 }
3311
Mike Christie8526cb12013-05-06 12:06:56 -05003312 dev = iscsi_find_flashnode_conn(fnode_sess);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003313 if (!dev) {
3314 err = -ENODEV;
Mike Christie8526cb12013-05-06 12:06:56 -05003315 goto put_sess;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003316 }
3317
3318 fnode_conn = iscsi_dev_to_flash_conn(dev);
3319 err = transport->login_flashnode(fnode_sess, fnode_conn);
Mike Christie8526cb12013-05-06 12:06:56 -05003320 put_device(dev);
3321
3322put_sess:
3323 put_device(&fnode_sess->dev);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003324
3325put_host:
3326 scsi_host_put(shost);
3327
3328exit_login_fnode:
3329 return err;
3330}
3331
3332static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3333 struct iscsi_uevent *ev)
3334{
3335 struct Scsi_Host *shost;
3336 struct iscsi_bus_flash_session *fnode_sess;
3337 struct iscsi_bus_flash_conn *fnode_conn;
3338 struct device *dev;
Mike Christie8526cb12013-05-06 12:06:56 -05003339 uint32_t idx;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003340 int err = 0;
3341
3342 if (!transport->logout_flashnode) {
3343 err = -ENOSYS;
3344 goto exit_logout_fnode;
3345 }
3346
3347 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3348 if (!shost) {
3349 pr_err("%s could not find host no %u\n",
3350 __func__, ev->u.logout_flashnode.host_no);
3351 err = -ENODEV;
3352 goto put_host;
3353 }
3354
Mike Christie8526cb12013-05-06 12:06:56 -05003355 idx = ev->u.logout_flashnode.flashnode_idx;
3356 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003357 if (!fnode_sess) {
3358 pr_err("%s could not find flashnode %u for host no %u\n",
Mike Christie8526cb12013-05-06 12:06:56 -05003359 __func__, idx, ev->u.logout_flashnode.host_no);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003360 err = -ENODEV;
3361 goto put_host;
3362 }
3363
Mike Christie8526cb12013-05-06 12:06:56 -05003364 dev = iscsi_find_flashnode_conn(fnode_sess);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003365 if (!dev) {
3366 err = -ENODEV;
Mike Christie8526cb12013-05-06 12:06:56 -05003367 goto put_sess;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003368 }
3369
3370 fnode_conn = iscsi_dev_to_flash_conn(dev);
3371
3372 err = transport->logout_flashnode(fnode_sess, fnode_conn);
Mike Christie8526cb12013-05-06 12:06:56 -05003373 put_device(dev);
3374
3375put_sess:
3376 put_device(&fnode_sess->dev);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003377
3378put_host:
3379 scsi_host_put(shost);
3380
3381exit_logout_fnode:
3382 return err;
3383}
3384
3385static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3386 struct iscsi_uevent *ev)
3387{
3388 struct Scsi_Host *shost;
3389 struct iscsi_cls_session *session;
3390 int err = 0;
3391
3392 if (!transport->logout_flashnode_sid) {
3393 err = -ENOSYS;
3394 goto exit_logout_sid;
3395 }
3396
3397 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3398 if (!shost) {
3399 pr_err("%s could not find host no %u\n",
3400 __func__, ev->u.logout_flashnode.host_no);
3401 err = -ENODEV;
3402 goto put_host;
3403 }
3404
3405 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3406 if (!session) {
3407 pr_err("%s could not find session id %u\n",
3408 __func__, ev->u.logout_flashnode_sid.sid);
3409 err = -EINVAL;
3410 goto put_host;
3411 }
3412
3413 err = transport->logout_flashnode_sid(session);
3414
3415put_host:
3416 scsi_host_put(shost);
3417
3418exit_logout_sid:
3419 return err;
3420}
3421
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003422static int
Lalit Chandivade6fa7c552013-11-22 05:28:18 -05003423iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3424{
3425 struct iscsi_uevent *ev = nlmsg_data(nlh);
3426 struct Scsi_Host *shost = NULL;
3427 struct iscsi_internal *priv;
3428 struct sk_buff *skbhost_stats;
3429 struct nlmsghdr *nlhhost_stats;
3430 struct iscsi_uevent *evhost_stats;
3431 int host_stats_size = 0;
3432 int len, err = 0;
3433 char *buf;
3434
3435 if (!transport->get_host_stats)
Mike Christie719e5872014-07-12 15:51:50 -05003436 return -ENOSYS;
Lalit Chandivade6fa7c552013-11-22 05:28:18 -05003437
3438 priv = iscsi_if_transport_lookup(transport);
3439 if (!priv)
3440 return -EINVAL;
3441
3442 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3443 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3444
3445 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3446 if (!shost) {
3447 pr_err("%s: failed. Cound not find host no %u\n",
3448 __func__, ev->u.get_host_stats.host_no);
3449 return -ENODEV;
3450 }
3451
3452 do {
3453 int actual_size;
3454
3455 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3456 if (!skbhost_stats) {
3457 pr_err("cannot deliver host stats: OOM\n");
3458 err = -ENOMEM;
3459 goto exit_host_stats;
3460 }
3461
3462 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3463 (len - sizeof(*nlhhost_stats)), 0);
3464 evhost_stats = nlmsg_data(nlhhost_stats);
3465 memset(evhost_stats, 0, sizeof(*evhost_stats));
3466 evhost_stats->transport_handle = iscsi_handle(transport);
3467 evhost_stats->type = nlh->nlmsg_type;
3468 evhost_stats->u.get_host_stats.host_no =
3469 ev->u.get_host_stats.host_no;
Nick Black' via open-iscsia799cb72014-07-01 11:24:37 -05003470 buf = (char *)evhost_stats + sizeof(*evhost_stats);
Lalit Chandivade6fa7c552013-11-22 05:28:18 -05003471 memset(buf, 0, host_stats_size);
3472
3473 err = transport->get_host_stats(shost, buf, host_stats_size);
Mike Christie2f7608f2014-07-12 15:51:48 -05003474 if (err) {
Mike Christiebfb50872014-08-03 18:37:52 -05003475 kfree_skb(skbhost_stats);
Mike Christie2f7608f2014-07-12 15:51:48 -05003476 goto exit_host_stats;
3477 }
Lalit Chandivade6fa7c552013-11-22 05:28:18 -05003478
3479 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3480 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3481 nlhhost_stats->nlmsg_len = actual_size;
3482
3483 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3484 GFP_KERNEL);
3485 } while (err < 0 && err != -ECONNREFUSED);
3486
3487exit_host_stats:
3488 scsi_host_put(shost);
3489 return err;
3490}
3491
3492
3493static int
Michael Chan43514772009-06-08 18:14:41 -07003494iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
Alex Aizman0896b752005-08-04 19:33:07 -07003495{
3496 int err = 0;
Hong zhi guoe07ebea2013-03-27 06:53:15 +00003497 struct iscsi_uevent *ev = nlmsg_data(nlh);
Alex Aizman0896b752005-08-04 19:33:07 -07003498 struct iscsi_transport *transport = NULL;
3499 struct iscsi_internal *priv;
Mike Christie7b7232f2006-02-01 21:06:49 -06003500 struct iscsi_cls_session *session;
3501 struct iscsi_cls_conn *conn;
Mike Christied82ff9be2008-05-21 15:54:13 -05003502 struct iscsi_endpoint *ep = NULL;
Alex Aizman0896b752005-08-04 19:33:07 -07003503
Michael Chan43514772009-06-08 18:14:41 -07003504 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3505 *group = ISCSI_NL_GRP_UIP;
3506 else
3507 *group = ISCSI_NL_GRP_ISCSID;
3508
Alex Aizman0896b752005-08-04 19:33:07 -07003509 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3510 if (!priv)
3511 return -EINVAL;
3512 transport = priv->iscsi_transport;
3513
Mike Christie7b7232f2006-02-01 21:06:49 -06003514 if (!try_module_get(transport->owner))
3515 return -EINVAL;
3516
Alex Aizman0896b752005-08-04 19:33:07 -07003517 switch (nlh->nlmsg_type) {
3518 case ISCSI_UEVENT_CREATE_SESSION:
Mike Christied82ff9be2008-05-21 15:54:13 -05003519 err = iscsi_if_create_session(priv, ep, ev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003520 NETLINK_CB(skb).portid,
Mike Christie40753ca2008-05-21 15:53:56 -05003521 ev->u.c_session.initial_cmdsn,
3522 ev->u.c_session.cmds_max,
3523 ev->u.c_session.queue_depth);
3524 break;
3525 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
Mike Christied82ff9be2008-05-21 15:54:13 -05003526 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
Mike Christiec95fddc2008-06-16 10:11:32 -05003527 if (!ep) {
3528 err = -EINVAL;
3529 break;
3530 }
Mike Christied82ff9be2008-05-21 15:54:13 -05003531
3532 err = iscsi_if_create_session(priv, ep, ev,
Eric W. Biederman15e47302012-09-07 20:12:54 +00003533 NETLINK_CB(skb).portid,
Mike Christie40753ca2008-05-21 15:53:56 -05003534 ev->u.c_bound_session.initial_cmdsn,
3535 ev->u.c_bound_session.cmds_max,
3536 ev->u.c_bound_session.queue_depth);
Alex Aizman0896b752005-08-04 19:33:07 -07003537 break;
3538 case ISCSI_UEVENT_DESTROY_SESSION:
Mike Christieb5c7a122006-04-06 21:13:33 -05003539 session = iscsi_session_lookup(ev->u.d_session.sid);
Mike Christie26974782007-12-13 12:43:29 -06003540 if (session)
Mike Christie7b7232f2006-02-01 21:06:49 -06003541 transport->destroy_session(session);
Mike Christie26974782007-12-13 12:43:29 -06003542 else
3543 err = -EINVAL;
3544 break;
3545 case ISCSI_UEVENT_UNBIND_SESSION:
3546 session = iscsi_session_lookup(ev->u.d_session.sid);
3547 if (session)
Mike Christie06d25af2009-03-05 14:46:02 -06003548 scsi_queue_work(iscsi_session_to_shost(session),
3549 &session->unbind_work);
Mike Christie26974782007-12-13 12:43:29 -06003550 else
Mike Christie7b7232f2006-02-01 21:06:49 -06003551 err = -EINVAL;
Alex Aizman0896b752005-08-04 19:33:07 -07003552 break;
3553 case ISCSI_UEVENT_CREATE_CONN:
3554 err = iscsi_if_create_conn(transport, ev);
3555 break;
3556 case ISCSI_UEVENT_DESTROY_CONN:
3557 err = iscsi_if_destroy_conn(transport, ev);
3558 break;
3559 case ISCSI_UEVENT_BIND_CONN:
Mike Christieb5c7a122006-04-06 21:13:33 -05003560 session = iscsi_session_lookup(ev->u.b_conn.sid);
3561 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
Mike Christie7b7232f2006-02-01 21:06:49 -06003562
Mike Christie22a39fb2011-02-16 15:04:33 -06003563 if (conn && conn->ep)
3564 iscsi_if_ep_disconnect(transport, conn->ep->id);
3565
3566 if (!session || !conn) {
Mike Christie7b7232f2006-02-01 21:06:49 -06003567 err = -EINVAL;
Mike Christie22a39fb2011-02-16 15:04:33 -06003568 break;
3569 }
3570
3571 ev->r.retcode = transport->bind_conn(session, conn,
3572 ev->u.b_conn.transport_eph,
3573 ev->u.b_conn.is_leading);
3574 if (ev->r.retcode || !transport->ep_connect)
3575 break;
3576
3577 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3578 if (ep) {
3579 ep->conn = conn;
3580
3581 mutex_lock(&conn->ep_mutex);
3582 conn->ep = ep;
3583 mutex_unlock(&conn->ep_mutex);
3584 } else
3585 iscsi_cls_conn_printk(KERN_ERR, conn,
3586 "Could not set ep conn "
3587 "binding\n");
Alex Aizman0896b752005-08-04 19:33:07 -07003588 break;
3589 case ISCSI_UEVENT_SET_PARAM:
Mike Christiefd7255f2006-04-06 21:13:36 -05003590 err = iscsi_set_param(transport, ev);
Alex Aizman0896b752005-08-04 19:33:07 -07003591 break;
3592 case ISCSI_UEVENT_START_CONN:
Mike Christieb5c7a122006-04-06 21:13:33 -05003593 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
Mike Christie7b7232f2006-02-01 21:06:49 -06003594 if (conn)
3595 ev->r.retcode = transport->start_conn(conn);
3596 else
3597 err = -EINVAL;
Alex Aizman0896b752005-08-04 19:33:07 -07003598 break;
3599 case ISCSI_UEVENT_STOP_CONN:
Mike Christieb5c7a122006-04-06 21:13:33 -05003600 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
Mike Christie7b7232f2006-02-01 21:06:49 -06003601 if (conn)
3602 transport->stop_conn(conn, ev->u.stop_conn.flag);
3603 else
3604 err = -EINVAL;
Alex Aizman0896b752005-08-04 19:33:07 -07003605 break;
3606 case ISCSI_UEVENT_SEND_PDU:
Mike Christieb5c7a122006-04-06 21:13:33 -05003607 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
Mike Christie7b7232f2006-02-01 21:06:49 -06003608 if (conn)
3609 ev->r.retcode = transport->send_pdu(conn,
3610 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3611 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3612 ev->u.send_pdu.data_size);
3613 else
3614 err = -EINVAL;
Alex Aizman0896b752005-08-04 19:33:07 -07003615 break;
3616 case ISCSI_UEVENT_GET_STATS:
Mike Christie5b940ad2006-02-01 21:06:56 -06003617 err = iscsi_if_get_stats(transport, nlh);
Alex Aizman0896b752005-08-04 19:33:07 -07003618 break;
Or Gerlitz264faaa2006-05-02 19:46:36 -05003619 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3620 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3621 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
Mike Christie10eb0f02009-05-13 17:57:38 -05003622 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
Or Gerlitz264faaa2006-05-02 19:46:36 -05003623 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3624 break;
Mike Christie01cb2252006-06-28 12:00:22 -05003625 case ISCSI_UEVENT_TGT_DSCVR:
3626 err = iscsi_tgt_dscvr(transport, ev);
3627 break;
Mike Christie1d9bf132007-05-30 12:57:11 -05003628 case ISCSI_UEVENT_SET_HOST_PARAM:
3629 err = iscsi_set_host_param(transport, ev);
3630 break;
Michael Chan43514772009-06-08 18:14:41 -07003631 case ISCSI_UEVENT_PATH_UPDATE:
3632 err = iscsi_set_path(transport, ev);
3633 break;
Mike Christie56c155b2011-07-25 13:48:37 -05003634 case ISCSI_UEVENT_SET_IFACE_PARAMS:
Mike Christie00c31882011-10-06 03:56:59 -05003635 err = iscsi_set_iface_params(transport, ev,
3636 nlmsg_attrlen(nlh, sizeof(*ev)));
Mike Christie56c155b2011-07-25 13:48:37 -05003637 break;
Vikas Chaudharyac20c7b2012-02-13 18:30:48 +05303638 case ISCSI_UEVENT_PING:
3639 err = iscsi_send_ping(transport, ev);
3640 break;
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003641 case ISCSI_UEVENT_GET_CHAP:
3642 err = iscsi_get_chap(transport, nlh);
3643 break;
3644 case ISCSI_UEVENT_DELETE_CHAP:
3645 err = iscsi_delete_chap(transport, ev);
3646 break;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04003647 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3648 err = iscsi_set_flashnode_param(transport, ev,
3649 nlmsg_attrlen(nlh,
3650 sizeof(*ev)));
3651 break;
3652 case ISCSI_UEVENT_NEW_FLASHNODE:
3653 err = iscsi_new_flashnode(transport, ev,
3654 nlmsg_attrlen(nlh, sizeof(*ev)));
3655 break;
3656 case ISCSI_UEVENT_DEL_FLASHNODE:
3657 err = iscsi_del_flashnode(transport, ev);
3658 break;
3659 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3660 err = iscsi_login_flashnode(transport, ev);
3661 break;
3662 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3663 err = iscsi_logout_flashnode(transport, ev);
3664 break;
3665 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3666 err = iscsi_logout_flashnode_sid(transport, ev);
3667 break;
Adheer Chandravanshi3af142f2013-09-17 07:54:48 -04003668 case ISCSI_UEVENT_SET_CHAP:
3669 err = iscsi_set_chap(transport, ev,
3670 nlmsg_attrlen(nlh, sizeof(*ev)));
3671 break;
Lalit Chandivade6fa7c552013-11-22 05:28:18 -05003672 case ISCSI_UEVENT_GET_HOST_STATS:
3673 err = iscsi_get_host_stats(transport, nlh);
3674 break;
Alex Aizman0896b752005-08-04 19:33:07 -07003675 default:
Mike Christie1d9bf132007-05-30 12:57:11 -05003676 err = -ENOSYS;
Alex Aizman0896b752005-08-04 19:33:07 -07003677 break;
3678 }
3679
Mike Christie7b7232f2006-02-01 21:06:49 -06003680 module_put(transport->owner);
Alex Aizman0896b752005-08-04 19:33:07 -07003681 return err;
3682}
3683
Mike Christieb5c7a122006-04-06 21:13:33 -05003684/*
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003685 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3686 * Malformed skbs with wrong lengths or invalid creds are not processed.
Mike Christieb5c7a122006-04-06 21:13:33 -05003687 */
Alex Aizman0896b752005-08-04 19:33:07 -07003688static void
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003689iscsi_if_rx(struct sk_buff *skb)
Alex Aizman0896b752005-08-04 19:33:07 -07003690{
Arjan van de Ven0b950672006-01-11 13:16:10 +01003691 mutex_lock(&rx_queue_mutex);
Hong zhi guoe07ebea2013-03-27 06:53:15 +00003692 while (skb->len >= NLMSG_HDRLEN) {
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003693 int err;
3694 uint32_t rlen;
3695 struct nlmsghdr *nlh;
3696 struct iscsi_uevent *ev;
Michael Chan43514772009-06-08 18:14:41 -07003697 uint32_t group;
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003698
3699 nlh = nlmsg_hdr(skb);
3700 if (nlh->nlmsg_len < sizeof(*nlh) ||
3701 skb->len < nlh->nlmsg_len) {
3702 break;
Mike Christieee7f8e42006-02-01 21:07:01 -06003703 }
Mike Christieee7f8e42006-02-01 21:07:01 -06003704
Hong zhi guoe07ebea2013-03-27 06:53:15 +00003705 ev = nlmsg_data(nlh);
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003706 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3707 if (rlen > skb->len)
3708 rlen = skb->len;
Alex Aizman0896b752005-08-04 19:33:07 -07003709
Michael Chan43514772009-06-08 18:14:41 -07003710 err = iscsi_if_recv_msg(skb, nlh, &group);
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003711 if (err) {
3712 ev->type = ISCSI_KEVENT_IF_ERROR;
3713 ev->iferror = err;
3714 }
3715 do {
3716 /*
3717 * special case for GET_STATS:
3718 * on success - sending reply and stats from
3719 * inside of if_recv_msg(),
3720 * on error - fall through.
3721 */
3722 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
Alex Aizman0896b752005-08-04 19:33:07 -07003723 break;
Nilesh Javali6260a5d2012-02-27 03:08:51 -08003724 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3725 break;
Michael Chan43514772009-06-08 18:14:41 -07003726 err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003727 nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
Sasha Levin46a7c172012-01-25 22:16:16 -05003728 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003729 skb_pull(skb, rlen);
Alex Aizman0896b752005-08-04 19:33:07 -07003730 }
Arjan van de Ven0b950672006-01-11 13:16:10 +01003731 mutex_unlock(&rx_queue_mutex);
Alex Aizman0896b752005-08-04 19:33:07 -07003732}
3733
Mike Christiefd7255f2006-04-06 21:13:36 -05003734#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
Tony Jonesee959b02008-02-22 00:13:36 +01003735struct device_attribute dev_attr_##_prefix##_##_name = \
Mike Christiefd7255f2006-04-06 21:13:36 -05003736 __ATTR(_name,_mode,_show,_store)
3737
Alex Aizman0896b752005-08-04 19:33:07 -07003738/*
3739 * iSCSI connection attrs
3740 */
Mike Christiea54a52c2006-06-28 12:00:23 -05003741#define iscsi_conn_attr_show(param) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07003742static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01003743show_conn_param_##param(struct device *dev, \
3744 struct device_attribute *attr, char *buf) \
Mike Christiefd7255f2006-04-06 21:13:36 -05003745{ \
Tony Jonesee959b02008-02-22 00:13:36 +01003746 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
Mike Christiefd7255f2006-04-06 21:13:36 -05003747 struct iscsi_transport *t = conn->transport; \
Mike Christiea54a52c2006-06-28 12:00:23 -05003748 return t->get_conn_param(conn, param, buf); \
Mike Christiefd7255f2006-04-06 21:13:36 -05003749}
3750
Mike Christiea54a52c2006-06-28 12:00:23 -05003751#define iscsi_conn_attr(field, param) \
3752 iscsi_conn_attr_show(param) \
3753static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
Mike Christiefd7255f2006-04-06 21:13:36 -05003754 NULL);
3755
Mike Christiea54a52c2006-06-28 12:00:23 -05003756iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3757iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3758iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3759iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3760iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3761iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3762iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
Mike Christiea54a52c2006-06-28 12:00:23 -05003763iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3764iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
Mike Christief6d51802007-12-13 12:43:30 -06003765iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3766iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
Adheer Chandravanshiae542ed2013-07-01 05:54:11 -04003767iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3768iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3769iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3770iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3771iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3772iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3773iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3774iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3775iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3776iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3777iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3778iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3779iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3780iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3781iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3782iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
Adheer Chandravanshi5af62f22013-11-22 05:28:20 -05003783iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
Adheer Chandravanshiae542ed2013-07-01 05:54:11 -04003784
Linus Torvalds1da177e2005-04-16 15:20:36 -07003785
Mike Christie289324b2011-02-16 15:04:37 -06003786#define iscsi_conn_ep_attr_show(param) \
3787static ssize_t show_conn_ep_param_##param(struct device *dev, \
3788 struct device_attribute *attr,\
3789 char *buf) \
3790{ \
3791 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3792 struct iscsi_transport *t = conn->transport; \
3793 struct iscsi_endpoint *ep; \
3794 ssize_t rc; \
3795 \
3796 /* \
3797 * Need to make sure ep_disconnect does not free the LLD's \
3798 * interconnect resources while we are trying to read them. \
3799 */ \
3800 mutex_lock(&conn->ep_mutex); \
3801 ep = conn->ep; \
3802 if (!ep && t->ep_connect) { \
3803 mutex_unlock(&conn->ep_mutex); \
3804 return -ENOTCONN; \
3805 } \
3806 \
3807 if (ep) \
3808 rc = t->get_ep_param(ep, param, buf); \
3809 else \
3810 rc = t->get_conn_param(conn, param, buf); \
3811 mutex_unlock(&conn->ep_mutex); \
3812 return rc; \
3813}
3814
3815#define iscsi_conn_ep_attr(field, param) \
3816 iscsi_conn_ep_attr_show(param) \
3817static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3818 show_conn_ep_param_##param, NULL);
3819
3820iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3821iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3822
Mike Christie3128c6c2011-07-25 13:48:42 -05003823static struct attribute *iscsi_conn_attrs[] = {
3824 &dev_attr_conn_max_recv_dlength.attr,
3825 &dev_attr_conn_max_xmit_dlength.attr,
3826 &dev_attr_conn_header_digest.attr,
3827 &dev_attr_conn_data_digest.attr,
3828 &dev_attr_conn_ifmarker.attr,
3829 &dev_attr_conn_ofmarker.attr,
3830 &dev_attr_conn_address.attr,
3831 &dev_attr_conn_port.attr,
3832 &dev_attr_conn_exp_statsn.attr,
3833 &dev_attr_conn_persistent_address.attr,
3834 &dev_attr_conn_persistent_port.attr,
3835 &dev_attr_conn_ping_tmo.attr,
3836 &dev_attr_conn_recv_tmo.attr,
Adheer Chandravanshiae542ed2013-07-01 05:54:11 -04003837 &dev_attr_conn_local_port.attr,
3838 &dev_attr_conn_statsn.attr,
3839 &dev_attr_conn_keepalive_tmo.attr,
3840 &dev_attr_conn_max_segment_size.attr,
3841 &dev_attr_conn_tcp_timestamp_stat.attr,
3842 &dev_attr_conn_tcp_wsf_disable.attr,
3843 &dev_attr_conn_tcp_nagle_disable.attr,
3844 &dev_attr_conn_tcp_timer_scale.attr,
3845 &dev_attr_conn_tcp_timestamp_enable.attr,
3846 &dev_attr_conn_fragment_disable.attr,
3847 &dev_attr_conn_ipv4_tos.attr,
3848 &dev_attr_conn_ipv6_traffic_class.attr,
3849 &dev_attr_conn_ipv6_flow_label.attr,
3850 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3851 &dev_attr_conn_tcp_xmit_wsf.attr,
3852 &dev_attr_conn_tcp_recv_wsf.attr,
Adheer Chandravanshi5af62f22013-11-22 05:28:20 -05003853 &dev_attr_conn_local_ipaddr.attr,
Mike Christie3128c6c2011-07-25 13:48:42 -05003854 NULL,
3855};
3856
Al Viro587a1f12011-07-23 23:11:19 -04003857static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
Mike Christie3128c6c2011-07-25 13:48:42 -05003858 struct attribute *attr, int i)
3859{
3860 struct device *cdev = container_of(kobj, struct device, kobj);
3861 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3862 struct iscsi_transport *t = conn->transport;
3863 int param;
3864
3865 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3866 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3867 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3868 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3869 else if (attr == &dev_attr_conn_header_digest.attr)
3870 param = ISCSI_PARAM_HDRDGST_EN;
3871 else if (attr == &dev_attr_conn_data_digest.attr)
3872 param = ISCSI_PARAM_DATADGST_EN;
3873 else if (attr == &dev_attr_conn_ifmarker.attr)
3874 param = ISCSI_PARAM_IFMARKER_EN;
3875 else if (attr == &dev_attr_conn_ofmarker.attr)
3876 param = ISCSI_PARAM_OFMARKER_EN;
3877 else if (attr == &dev_attr_conn_address.attr)
3878 param = ISCSI_PARAM_CONN_ADDRESS;
3879 else if (attr == &dev_attr_conn_port.attr)
3880 param = ISCSI_PARAM_CONN_PORT;
3881 else if (attr == &dev_attr_conn_exp_statsn.attr)
3882 param = ISCSI_PARAM_EXP_STATSN;
3883 else if (attr == &dev_attr_conn_persistent_address.attr)
3884 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3885 else if (attr == &dev_attr_conn_persistent_port.attr)
3886 param = ISCSI_PARAM_PERSISTENT_PORT;
3887 else if (attr == &dev_attr_conn_ping_tmo.attr)
3888 param = ISCSI_PARAM_PING_TMO;
3889 else if (attr == &dev_attr_conn_recv_tmo.attr)
3890 param = ISCSI_PARAM_RECV_TMO;
Adheer Chandravanshiae542ed2013-07-01 05:54:11 -04003891 else if (attr == &dev_attr_conn_local_port.attr)
3892 param = ISCSI_PARAM_LOCAL_PORT;
3893 else if (attr == &dev_attr_conn_statsn.attr)
3894 param = ISCSI_PARAM_STATSN;
3895 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3896 param = ISCSI_PARAM_KEEPALIVE_TMO;
3897 else if (attr == &dev_attr_conn_max_segment_size.attr)
3898 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3899 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3900 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3901 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3902 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3903 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3904 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3905 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3906 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3907 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3908 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3909 else if (attr == &dev_attr_conn_fragment_disable.attr)
3910 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3911 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3912 param = ISCSI_PARAM_IPV4_TOS;
3913 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3914 param = ISCSI_PARAM_IPV6_TC;
3915 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3916 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3917 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3918 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3919 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3920 param = ISCSI_PARAM_TCP_XMIT_WSF;
3921 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3922 param = ISCSI_PARAM_TCP_RECV_WSF;
Adheer Chandravanshi5af62f22013-11-22 05:28:20 -05003923 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3924 param = ISCSI_PARAM_LOCAL_IPADDR;
Mike Christie3128c6c2011-07-25 13:48:42 -05003925 else {
3926 WARN_ONCE(1, "Invalid conn attr");
3927 return 0;
3928 }
3929
3930 return t->attr_is_visible(ISCSI_PARAM, param);
3931}
3932
3933static struct attribute_group iscsi_conn_group = {
3934 .attrs = iscsi_conn_attrs,
3935 .is_visible = iscsi_conn_attr_is_visible,
3936};
3937
Linus Torvalds1da177e2005-04-16 15:20:36 -07003938/*
Alex Aizman0896b752005-08-04 19:33:07 -07003939 * iSCSI session attrs
Linus Torvalds1da177e2005-04-16 15:20:36 -07003940 */
Mike Christieb2c64162007-05-30 12:57:16 -05003941#define iscsi_session_attr_show(param, perm) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07003942static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01003943show_session_param_##param(struct device *dev, \
3944 struct device_attribute *attr, char *buf) \
Mike Christiefd7255f2006-04-06 21:13:36 -05003945{ \
Tony Jonesee959b02008-02-22 00:13:36 +01003946 struct iscsi_cls_session *session = \
3947 iscsi_dev_to_session(dev->parent); \
Mike Christiefd7255f2006-04-06 21:13:36 -05003948 struct iscsi_transport *t = session->transport; \
Mike Christieb2c64162007-05-30 12:57:16 -05003949 \
3950 if (perm && !capable(CAP_SYS_ADMIN)) \
3951 return -EACCES; \
Mike Christiea54a52c2006-06-28 12:00:23 -05003952 return t->get_session_param(session, param, buf); \
Mike Christiefd7255f2006-04-06 21:13:36 -05003953}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003954
Mike Christieb2c64162007-05-30 12:57:16 -05003955#define iscsi_session_attr(field, param, perm) \
3956 iscsi_session_attr_show(param, perm) \
Mike Christiea54a52c2006-06-28 12:00:23 -05003957static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
Mike Christiefd7255f2006-04-06 21:13:36 -05003958 NULL);
Mike Christieb2c64162007-05-30 12:57:16 -05003959iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3960iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3961iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3962iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3963iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3964iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3965iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3966iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3967iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3968iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3969iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3970iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3971iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3972iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
Mike Christie30534952012-02-27 03:08:53 -08003973iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3974iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
Mike Christie4cd49ea2007-12-13 12:43:38 -06003975iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3976iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3977iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
Mike Christie3fe5ae82009-11-11 16:34:33 -06003978iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
Mike Christie88dfd342008-05-21 15:54:16 -05003979iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
Vikas Chaudhary3b2bef12010-07-10 14:51:30 +05303980iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3981iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
Eddie Wai3b9373e2013-06-20 10:21:26 -07003982iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3983iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3984iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
Adheer Chandravanshiae542ed2013-07-01 05:54:11 -04003985iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3986iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3987iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3988iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3989iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3990iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3991iscsi_session_attr(discovery_auth_optional,
3992 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3993iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3994iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3995iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3996iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3997iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3998iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3999iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
Mike Christiefd7255f2006-04-06 21:13:36 -05004000
Mike Christie6eabafb2008-01-31 13:36:43 -06004001static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01004002show_priv_session_state(struct device *dev, struct device_attribute *attr,
4003 char *buf)
Mike Christie6eabafb2008-01-31 13:36:43 -06004004{
Tony Jonesee959b02008-02-22 00:13:36 +01004005 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
Mike Christie6eabafb2008-01-31 13:36:43 -06004006 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4007}
4008static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4009 NULL);
Mike Christie0c70d842011-12-05 16:44:01 -06004010static ssize_t
4011show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4012 char *buf)
4013{
4014 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4015 return sprintf(buf, "%d\n", session->creator);
4016}
4017static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4018 NULL);
Manish Rangankar930a9f02012-11-23 06:58:41 -05004019static ssize_t
4020show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4021 char *buf)
4022{
4023 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4024 return sprintf(buf, "%d\n", session->target_id);
4025}
4026static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4027 show_priv_session_target_id, NULL);
Mike Christie6eabafb2008-01-31 13:36:43 -06004028
Mike Christiefd7255f2006-04-06 21:13:36 -05004029#define iscsi_priv_session_attr_show(field, format) \
4030static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01004031show_priv_session_##field(struct device *dev, \
4032 struct device_attribute *attr, char *buf) \
Mike Christiefd7255f2006-04-06 21:13:36 -05004033{ \
Tony Jonesee959b02008-02-22 00:13:36 +01004034 struct iscsi_cls_session *session = \
4035 iscsi_dev_to_session(dev->parent); \
Vikas Chaudharyfe4f0bd2010-07-22 16:57:43 +05304036 if (session->field == -1) \
4037 return sprintf(buf, "off\n"); \
Mike Christiefd7255f2006-04-06 21:13:36 -05004038 return sprintf(buf, format"\n", session->field); \
4039}
4040
Vikas Chaudharyfe4f0bd2010-07-22 16:57:43 +05304041#define iscsi_priv_session_attr_store(field) \
4042static ssize_t \
4043store_priv_session_##field(struct device *dev, \
4044 struct device_attribute *attr, \
4045 const char *buf, size_t count) \
4046{ \
4047 int val; \
4048 char *cp; \
4049 struct iscsi_cls_session *session = \
4050 iscsi_dev_to_session(dev->parent); \
4051 if ((session->state == ISCSI_SESSION_FREE) || \
4052 (session->state == ISCSI_SESSION_FAILED)) \
4053 return -EBUSY; \
Chris Leech9c8108a2015-06-16 16:07:13 -07004054 if (strncmp(buf, "off", 3) == 0) { \
Vikas Chaudharyfe4f0bd2010-07-22 16:57:43 +05304055 session->field = -1; \
Chris Leech9c8108a2015-06-16 16:07:13 -07004056 session->field##_sysfs_override = true; \
4057 } else { \
Vikas Chaudharyfe4f0bd2010-07-22 16:57:43 +05304058 val = simple_strtoul(buf, &cp, 0); \
4059 if (*cp != '\0' && *cp != '\n') \
4060 return -EINVAL; \
4061 session->field = val; \
Chris Leech9c8108a2015-06-16 16:07:13 -07004062 session->field##_sysfs_override = true; \
Vikas Chaudharyfe4f0bd2010-07-22 16:57:43 +05304063 } \
4064 return count; \
4065}
4066
4067#define iscsi_priv_session_rw_attr(field, format) \
Mike Christiefd7255f2006-04-06 21:13:36 -05004068 iscsi_priv_session_attr_show(field, format) \
Vikas Chaudharyfe4f0bd2010-07-22 16:57:43 +05304069 iscsi_priv_session_attr_store(field) \
Vasiliy Kulikov523f3c82011-02-04 15:24:14 +03004070static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
Vikas Chaudharyfe4f0bd2010-07-22 16:57:43 +05304071 show_priv_session_##field, \
4072 store_priv_session_##field)
Chris Leech9c8108a2015-06-16 16:07:13 -07004073
Vikas Chaudharyfe4f0bd2010-07-22 16:57:43 +05304074iscsi_priv_session_rw_attr(recovery_tmo, "%d");
Mike Christiefd7255f2006-04-06 21:13:36 -05004075
Mike Christie1d063c12011-07-25 13:48:43 -05004076static struct attribute *iscsi_session_attrs[] = {
4077 &dev_attr_sess_initial_r2t.attr,
4078 &dev_attr_sess_max_outstanding_r2t.attr,
4079 &dev_attr_sess_immediate_data.attr,
4080 &dev_attr_sess_first_burst_len.attr,
4081 &dev_attr_sess_max_burst_len.attr,
4082 &dev_attr_sess_data_pdu_in_order.attr,
4083 &dev_attr_sess_data_seq_in_order.attr,
4084 &dev_attr_sess_erl.attr,
4085 &dev_attr_sess_targetname.attr,
4086 &dev_attr_sess_tpgt.attr,
4087 &dev_attr_sess_password.attr,
4088 &dev_attr_sess_password_in.attr,
4089 &dev_attr_sess_username.attr,
4090 &dev_attr_sess_username_in.attr,
4091 &dev_attr_sess_fast_abort.attr,
4092 &dev_attr_sess_abort_tmo.attr,
4093 &dev_attr_sess_lu_reset_tmo.attr,
4094 &dev_attr_sess_tgt_reset_tmo.attr,
4095 &dev_attr_sess_ifacename.attr,
4096 &dev_attr_sess_initiatorname.attr,
4097 &dev_attr_sess_targetalias.attr,
Eddie Wai3b9373e2013-06-20 10:21:26 -07004098 &dev_attr_sess_boot_root.attr,
4099 &dev_attr_sess_boot_nic.attr,
4100 &dev_attr_sess_boot_target.attr,
Mike Christie1d063c12011-07-25 13:48:43 -05004101 &dev_attr_priv_sess_recovery_tmo.attr,
4102 &dev_attr_priv_sess_state.attr,
Mike Christie0c70d842011-12-05 16:44:01 -06004103 &dev_attr_priv_sess_creator.attr,
Mike Christie30534952012-02-27 03:08:53 -08004104 &dev_attr_sess_chap_out_idx.attr,
4105 &dev_attr_sess_chap_in_idx.attr,
Manish Rangankar930a9f02012-11-23 06:58:41 -05004106 &dev_attr_priv_sess_target_id.attr,
Adheer Chandravanshiae542ed2013-07-01 05:54:11 -04004107 &dev_attr_sess_auto_snd_tgt_disable.attr,
4108 &dev_attr_sess_discovery_session.attr,
4109 &dev_attr_sess_portal_type.attr,
4110 &dev_attr_sess_chap_auth.attr,
4111 &dev_attr_sess_discovery_logout.attr,
4112 &dev_attr_sess_bidi_chap.attr,
4113 &dev_attr_sess_discovery_auth_optional.attr,
4114 &dev_attr_sess_def_time2wait.attr,
4115 &dev_attr_sess_def_time2retain.attr,
4116 &dev_attr_sess_isid.attr,
4117 &dev_attr_sess_tsid.attr,
4118 &dev_attr_sess_def_taskmgmt_tmo.attr,
4119 &dev_attr_sess_discovery_parent_idx.attr,
4120 &dev_attr_sess_discovery_parent_type.attr,
Mike Christie1d063c12011-07-25 13:48:43 -05004121 NULL,
4122};
4123
Al Viro587a1f12011-07-23 23:11:19 -04004124static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
Mike Christie1d063c12011-07-25 13:48:43 -05004125 struct attribute *attr, int i)
4126{
4127 struct device *cdev = container_of(kobj, struct device, kobj);
4128 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4129 struct iscsi_transport *t = session->transport;
4130 int param;
4131
4132 if (attr == &dev_attr_sess_initial_r2t.attr)
4133 param = ISCSI_PARAM_INITIAL_R2T_EN;
4134 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4135 param = ISCSI_PARAM_MAX_R2T;
4136 else if (attr == &dev_attr_sess_immediate_data.attr)
4137 param = ISCSI_PARAM_IMM_DATA_EN;
4138 else if (attr == &dev_attr_sess_first_burst_len.attr)
4139 param = ISCSI_PARAM_FIRST_BURST;
4140 else if (attr == &dev_attr_sess_max_burst_len.attr)
4141 param = ISCSI_PARAM_MAX_BURST;
4142 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4143 param = ISCSI_PARAM_PDU_INORDER_EN;
4144 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4145 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4146 else if (attr == &dev_attr_sess_erl.attr)
4147 param = ISCSI_PARAM_ERL;
4148 else if (attr == &dev_attr_sess_targetname.attr)
4149 param = ISCSI_PARAM_TARGET_NAME;
4150 else if (attr == &dev_attr_sess_tpgt.attr)
4151 param = ISCSI_PARAM_TPGT;
Mike Christie30534952012-02-27 03:08:53 -08004152 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4153 param = ISCSI_PARAM_CHAP_IN_IDX;
4154 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4155 param = ISCSI_PARAM_CHAP_OUT_IDX;
Mike Christie1d063c12011-07-25 13:48:43 -05004156 else if (attr == &dev_attr_sess_password.attr)
4157 param = ISCSI_PARAM_USERNAME;
4158 else if (attr == &dev_attr_sess_password_in.attr)
4159 param = ISCSI_PARAM_USERNAME_IN;
4160 else if (attr == &dev_attr_sess_username.attr)
4161 param = ISCSI_PARAM_PASSWORD;
4162 else if (attr == &dev_attr_sess_username_in.attr)
4163 param = ISCSI_PARAM_PASSWORD_IN;
4164 else if (attr == &dev_attr_sess_fast_abort.attr)
4165 param = ISCSI_PARAM_FAST_ABORT;
4166 else if (attr == &dev_attr_sess_abort_tmo.attr)
4167 param = ISCSI_PARAM_ABORT_TMO;
4168 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4169 param = ISCSI_PARAM_LU_RESET_TMO;
4170 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4171 param = ISCSI_PARAM_TGT_RESET_TMO;
4172 else if (attr == &dev_attr_sess_ifacename.attr)
4173 param = ISCSI_PARAM_IFACE_NAME;
4174 else if (attr == &dev_attr_sess_initiatorname.attr)
4175 param = ISCSI_PARAM_INITIATOR_NAME;
4176 else if (attr == &dev_attr_sess_targetalias.attr)
4177 param = ISCSI_PARAM_TARGET_ALIAS;
Eddie Wai3b9373e2013-06-20 10:21:26 -07004178 else if (attr == &dev_attr_sess_boot_root.attr)
4179 param = ISCSI_PARAM_BOOT_ROOT;
4180 else if (attr == &dev_attr_sess_boot_nic.attr)
4181 param = ISCSI_PARAM_BOOT_NIC;
4182 else if (attr == &dev_attr_sess_boot_target.attr)
4183 param = ISCSI_PARAM_BOOT_TARGET;
Adheer Chandravanshiae542ed2013-07-01 05:54:11 -04004184 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4185 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4186 else if (attr == &dev_attr_sess_discovery_session.attr)
4187 param = ISCSI_PARAM_DISCOVERY_SESS;
4188 else if (attr == &dev_attr_sess_portal_type.attr)
4189 param = ISCSI_PARAM_PORTAL_TYPE;
4190 else if (attr == &dev_attr_sess_chap_auth.attr)
4191 param = ISCSI_PARAM_CHAP_AUTH_EN;
4192 else if (attr == &dev_attr_sess_discovery_logout.attr)
4193 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4194 else if (attr == &dev_attr_sess_bidi_chap.attr)
4195 param = ISCSI_PARAM_BIDI_CHAP_EN;
4196 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4197 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4198 else if (attr == &dev_attr_sess_def_time2wait.attr)
4199 param = ISCSI_PARAM_DEF_TIME2WAIT;
4200 else if (attr == &dev_attr_sess_def_time2retain.attr)
4201 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4202 else if (attr == &dev_attr_sess_isid.attr)
4203 param = ISCSI_PARAM_ISID;
4204 else if (attr == &dev_attr_sess_tsid.attr)
4205 param = ISCSI_PARAM_TSID;
4206 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4207 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4208 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4209 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4210 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4211 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
Mike Christie1d063c12011-07-25 13:48:43 -05004212 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4213 return S_IRUGO | S_IWUSR;
4214 else if (attr == &dev_attr_priv_sess_state.attr)
4215 return S_IRUGO;
Mike Christie0c70d842011-12-05 16:44:01 -06004216 else if (attr == &dev_attr_priv_sess_creator.attr)
4217 return S_IRUGO;
Manish Rangankar930a9f02012-11-23 06:58:41 -05004218 else if (attr == &dev_attr_priv_sess_target_id.attr)
4219 return S_IRUGO;
Mike Christie1d063c12011-07-25 13:48:43 -05004220 else {
4221 WARN_ONCE(1, "Invalid session attr");
4222 return 0;
4223 }
4224
4225 return t->attr_is_visible(ISCSI_PARAM, param);
4226}
4227
4228static struct attribute_group iscsi_session_group = {
4229 .attrs = iscsi_session_attrs,
4230 .is_visible = iscsi_session_attr_is_visible,
4231};
4232
Mike Christie1819dc82007-05-30 12:57:08 -05004233/*
4234 * iSCSI host attrs
4235 */
4236#define iscsi_host_attr_show(param) \
4237static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01004238show_host_param_##param(struct device *dev, \
4239 struct device_attribute *attr, char *buf) \
Mike Christie1819dc82007-05-30 12:57:08 -05004240{ \
Tony Jonesee959b02008-02-22 00:13:36 +01004241 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Mike Christie1819dc82007-05-30 12:57:08 -05004242 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4243 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4244}
4245
4246#define iscsi_host_attr(field, param) \
4247 iscsi_host_attr_show(param) \
4248static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4249 NULL);
4250
Mike Christied8196ed2007-05-30 12:57:25 -05004251iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
Mike Christie1819dc82007-05-30 12:57:08 -05004252iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
Mike Christied8196ed2007-05-30 12:57:25 -05004253iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
Mike Christie8ad57812007-05-30 12:57:13 -05004254iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
Vikas Chaudharyaeddde22012-01-19 03:06:55 -08004255iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4256iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
Mike Christie1819dc82007-05-30 12:57:08 -05004257
Mike Christief27fb2e2011-07-25 13:48:45 -05004258static struct attribute *iscsi_host_attrs[] = {
4259 &dev_attr_host_netdev.attr,
4260 &dev_attr_host_hwaddress.attr,
4261 &dev_attr_host_ipaddress.attr,
4262 &dev_attr_host_initiatorname.attr,
Vikas Chaudharyaeddde22012-01-19 03:06:55 -08004263 &dev_attr_host_port_state.attr,
4264 &dev_attr_host_port_speed.attr,
Mike Christief27fb2e2011-07-25 13:48:45 -05004265 NULL,
4266};
4267
Al Viro587a1f12011-07-23 23:11:19 -04004268static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
Mike Christief27fb2e2011-07-25 13:48:45 -05004269 struct attribute *attr, int i)
4270{
4271 struct device *cdev = container_of(kobj, struct device, kobj);
4272 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4273 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4274 int param;
4275
4276 if (attr == &dev_attr_host_netdev.attr)
4277 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4278 else if (attr == &dev_attr_host_hwaddress.attr)
4279 param = ISCSI_HOST_PARAM_HWADDRESS;
4280 else if (attr == &dev_attr_host_ipaddress.attr)
4281 param = ISCSI_HOST_PARAM_IPADDRESS;
4282 else if (attr == &dev_attr_host_initiatorname.attr)
4283 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
Vikas Chaudharyaeddde22012-01-19 03:06:55 -08004284 else if (attr == &dev_attr_host_port_state.attr)
4285 param = ISCSI_HOST_PARAM_PORT_STATE;
4286 else if (attr == &dev_attr_host_port_speed.attr)
4287 param = ISCSI_HOST_PARAM_PORT_SPEED;
Mike Christief27fb2e2011-07-25 13:48:45 -05004288 else {
4289 WARN_ONCE(1, "Invalid host attr");
4290 return 0;
4291 }
4292
4293 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4294}
4295
4296static struct attribute_group iscsi_host_group = {
4297 .attrs = iscsi_host_attrs,
4298 .is_visible = iscsi_host_attr_is_visible,
4299};
Mike Christie1819dc82007-05-30 12:57:08 -05004300
Vikas Chaudharyaeddde22012-01-19 03:06:55 -08004301/* convert iscsi_port_speed values to ascii string name */
4302static const struct {
4303 enum iscsi_port_speed value;
4304 char *name;
4305} iscsi_port_speed_names[] = {
4306 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4307 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4308 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4309 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4310 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4311};
4312
4313char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4314{
4315 int i;
4316 char *speed = "Unknown!";
4317 struct iscsi_cls_host *ihost = shost->shost_data;
4318 uint32_t port_speed = ihost->port_speed;
4319
4320 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4321 if (iscsi_port_speed_names[i].value & port_speed) {
4322 speed = iscsi_port_speed_names[i].name;
4323 break;
4324 }
4325 }
4326 return speed;
4327}
4328EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4329
4330/* convert iscsi_port_state values to ascii string name */
4331static const struct {
4332 enum iscsi_port_state value;
4333 char *name;
4334} iscsi_port_state_names[] = {
4335 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4336 {ISCSI_PORT_STATE_UP, "LINK UP" },
4337};
4338
4339char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4340{
4341 int i;
4342 char *state = "Unknown!";
4343 struct iscsi_cls_host *ihost = shost->shost_data;
4344 uint32_t port_state = ihost->port_state;
4345
4346 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4347 if (iscsi_port_state_names[i].value & port_state) {
4348 state = iscsi_port_state_names[i].name;
4349 break;
4350 }
4351 }
4352 return state;
4353}
4354EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4355
Alex Aizman0896b752005-08-04 19:33:07 -07004356static int iscsi_session_match(struct attribute_container *cont,
4357 struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004358{
Mike Christie7b8631b2006-01-13 18:05:50 -06004359 struct iscsi_cls_session *session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004360 struct Scsi_Host *shost;
Alex Aizman0896b752005-08-04 19:33:07 -07004361 struct iscsi_internal *priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004362
Alex Aizman0896b752005-08-04 19:33:07 -07004363 if (!iscsi_is_session_dev(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004364 return 0;
4365
Mike Christie7b8631b2006-01-13 18:05:50 -06004366 session = iscsi_dev_to_session(dev);
4367 shost = iscsi_session_to_shost(session);
Alex Aizman0896b752005-08-04 19:33:07 -07004368 if (!shost->transportt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004369 return 0;
4370
Alex Aizman0896b752005-08-04 19:33:07 -07004371 priv = to_iscsi_internal(shost->transportt);
4372 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4373 return 0;
4374
4375 return &priv->session_cont.ac == cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004376}
4377
Alex Aizman0896b752005-08-04 19:33:07 -07004378static int iscsi_conn_match(struct attribute_container *cont,
4379 struct device *dev)
4380{
Mike Christie7b8631b2006-01-13 18:05:50 -06004381 struct iscsi_cls_session *session;
4382 struct iscsi_cls_conn *conn;
Alex Aizman0896b752005-08-04 19:33:07 -07004383 struct Scsi_Host *shost;
4384 struct iscsi_internal *priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004385
Alex Aizman0896b752005-08-04 19:33:07 -07004386 if (!iscsi_is_conn_dev(dev))
4387 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004388
Mike Christie7b8631b2006-01-13 18:05:50 -06004389 conn = iscsi_dev_to_conn(dev);
4390 session = iscsi_dev_to_session(conn->dev.parent);
4391 shost = iscsi_session_to_shost(session);
4392
Alex Aizman0896b752005-08-04 19:33:07 -07004393 if (!shost->transportt)
4394 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004395
Alex Aizman0896b752005-08-04 19:33:07 -07004396 priv = to_iscsi_internal(shost->transportt);
4397 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4398 return 0;
4399
4400 return &priv->conn_cont.ac == cont;
4401}
4402
Mike Christie30a6c652006-04-06 21:13:39 -05004403static int iscsi_host_match(struct attribute_container *cont,
4404 struct device *dev)
4405{
4406 struct Scsi_Host *shost;
4407 struct iscsi_internal *priv;
4408
4409 if (!scsi_is_host_device(dev))
4410 return 0;
4411
4412 shost = dev_to_shost(dev);
4413 if (!shost->transportt ||
4414 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4415 return 0;
4416
4417 priv = to_iscsi_internal(shost->transportt);
4418 return &priv->t.host_attrs.ac == cont;
4419}
4420
Mike Christie7b8631b2006-01-13 18:05:50 -06004421struct scsi_transport_template *
4422iscsi_register_transport(struct iscsi_transport *tt)
Alex Aizman0896b752005-08-04 19:33:07 -07004423{
4424 struct iscsi_internal *priv;
4425 unsigned long flags;
Mike Christief27fb2e2011-07-25 13:48:45 -05004426 int err;
Alex Aizman0896b752005-08-04 19:33:07 -07004427
4428 BUG_ON(!tt);
4429
4430 priv = iscsi_if_transport_lookup(tt);
4431 if (priv)
Mike Christie7b8631b2006-01-13 18:05:50 -06004432 return NULL;
Alex Aizman0896b752005-08-04 19:33:07 -07004433
Jes Sorensen24669f752006-01-16 10:31:18 -05004434 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
Alex Aizman0896b752005-08-04 19:33:07 -07004435 if (!priv)
Mike Christie7b8631b2006-01-13 18:05:50 -06004436 return NULL;
Alex Aizman0896b752005-08-04 19:33:07 -07004437 INIT_LIST_HEAD(&priv->list);
Alex Aizman0896b752005-08-04 19:33:07 -07004438 priv->iscsi_transport = tt;
Mike Christie30a6c652006-04-06 21:13:39 -05004439 priv->t.user_scan = iscsi_user_scan;
Mike Christie06d25af2009-03-05 14:46:02 -06004440 priv->t.create_work_queue = 1;
Alex Aizman0896b752005-08-04 19:33:07 -07004441
Tony Jonesee959b02008-02-22 00:13:36 +01004442 priv->dev.class = &iscsi_transport_class;
Kay Sievers71610f52008-12-03 22:41:36 +01004443 dev_set_name(&priv->dev, "%s", tt->name);
Tony Jonesee959b02008-02-22 00:13:36 +01004444 err = device_register(&priv->dev);
Alex Aizman0896b752005-08-04 19:33:07 -07004445 if (err)
4446 goto free_priv;
4447
Tony Jonesee959b02008-02-22 00:13:36 +01004448 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
Alex Aizman0896b752005-08-04 19:33:07 -07004449 if (err)
Tony Jonesee959b02008-02-22 00:13:36 +01004450 goto unregister_dev;
Alex Aizman0896b752005-08-04 19:33:07 -07004451
Mike Christie30a6c652006-04-06 21:13:39 -05004452 /* host parameters */
Mike Christie30a6c652006-04-06 21:13:39 -05004453 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4454 priv->t.host_attrs.ac.match = iscsi_host_match;
Mike Christief27fb2e2011-07-25 13:48:45 -05004455 priv->t.host_attrs.ac.grp = &iscsi_host_group;
Mike Christie32c6e1b2008-05-21 15:53:58 -05004456 priv->t.host_size = sizeof(struct iscsi_cls_host);
Mike Christie30a6c652006-04-06 21:13:39 -05004457 transport_container_register(&priv->t.host_attrs);
4458
Alex Aizman0896b752005-08-04 19:33:07 -07004459 /* connection parameters */
Alex Aizman0896b752005-08-04 19:33:07 -07004460 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4461 priv->conn_cont.ac.match = iscsi_conn_match;
Mike Christie3128c6c2011-07-25 13:48:42 -05004462 priv->conn_cont.ac.grp = &iscsi_conn_group;
Alex Aizman0896b752005-08-04 19:33:07 -07004463 transport_container_register(&priv->conn_cont);
4464
Alex Aizman0896b752005-08-04 19:33:07 -07004465 /* session parameters */
Alex Aizman0896b752005-08-04 19:33:07 -07004466 priv->session_cont.ac.class = &iscsi_session_class.class;
4467 priv->session_cont.ac.match = iscsi_session_match;
Mike Christie1d063c12011-07-25 13:48:43 -05004468 priv->session_cont.ac.grp = &iscsi_session_group;
Alex Aizman0896b752005-08-04 19:33:07 -07004469 transport_container_register(&priv->session_cont);
4470
Alex Aizman0896b752005-08-04 19:33:07 -07004471 spin_lock_irqsave(&iscsi_transport_lock, flags);
4472 list_add(&priv->list, &iscsi_transports);
4473 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004474
Alex Aizman0896b752005-08-04 19:33:07 -07004475 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
Mike Christie7b8631b2006-01-13 18:05:50 -06004476 return &priv->t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004477
Tony Jonesee959b02008-02-22 00:13:36 +01004478unregister_dev:
4479 device_unregister(&priv->dev);
Mike Christied82ff9be2008-05-21 15:54:13 -05004480 return NULL;
Alex Aizman0896b752005-08-04 19:33:07 -07004481free_priv:
4482 kfree(priv);
Mike Christie7b8631b2006-01-13 18:05:50 -06004483 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004484}
Alex Aizman0896b752005-08-04 19:33:07 -07004485EXPORT_SYMBOL_GPL(iscsi_register_transport);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004486
Alex Aizman0896b752005-08-04 19:33:07 -07004487int iscsi_unregister_transport(struct iscsi_transport *tt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004488{
Alex Aizman0896b752005-08-04 19:33:07 -07004489 struct iscsi_internal *priv;
4490 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004491
Alex Aizman0896b752005-08-04 19:33:07 -07004492 BUG_ON(!tt);
4493
Arjan van de Ven0b950672006-01-11 13:16:10 +01004494 mutex_lock(&rx_queue_mutex);
Alex Aizman0896b752005-08-04 19:33:07 -07004495
4496 priv = iscsi_if_transport_lookup(tt);
4497 BUG_ON (!priv);
4498
Alex Aizman0896b752005-08-04 19:33:07 -07004499 spin_lock_irqsave(&iscsi_transport_lock, flags);
4500 list_del(&priv->list);
4501 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4502
4503 transport_container_unregister(&priv->conn_cont);
4504 transport_container_unregister(&priv->session_cont);
Mike Christie30a6c652006-04-06 21:13:39 -05004505 transport_container_unregister(&priv->t.host_attrs);
Alex Aizman0896b752005-08-04 19:33:07 -07004506
Tony Jonesee959b02008-02-22 00:13:36 +01004507 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4508 device_unregister(&priv->dev);
Arjan van de Ven0b950672006-01-11 13:16:10 +01004509 mutex_unlock(&rx_queue_mutex);
Alex Aizman0896b752005-08-04 19:33:07 -07004510
4511 return 0;
4512}
4513EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4514
Linus Torvalds1da177e2005-04-16 15:20:36 -07004515static __init int iscsi_transport_init(void)
4516{
Alex Aizman0896b752005-08-04 19:33:07 -07004517 int err;
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00004518 struct netlink_kernel_cfg cfg = {
4519 .groups = 1,
4520 .input = iscsi_if_rx,
4521 };
Meelis Roos09492602006-12-17 12:10:26 -06004522 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
Mike Christief4246b32006-07-24 15:47:54 -05004523 ISCSI_TRANSPORT_VERSION);
4524
Mike Christie41be1442007-02-28 17:32:18 -06004525 atomic_set(&iscsi_session_nr, 0);
4526
Alex Aizman0896b752005-08-04 19:33:07 -07004527 err = class_register(&iscsi_transport_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004528 if (err)
4529 return err;
Alex Aizman0896b752005-08-04 19:33:07 -07004530
Mike Christied82ff9be2008-05-21 15:54:13 -05004531 err = class_register(&iscsi_endpoint_class);
Alex Aizman0896b752005-08-04 19:33:07 -07004532 if (err)
4533 goto unregister_transport_class;
4534
Mike Christie8d079132011-07-25 13:48:40 -05004535 err = class_register(&iscsi_iface_class);
Mike Christied82ff9be2008-05-21 15:54:13 -05004536 if (err)
4537 goto unregister_endpoint_class;
4538
Mike Christie8d079132011-07-25 13:48:40 -05004539 err = transport_class_register(&iscsi_host_class);
4540 if (err)
4541 goto unregister_iface_class;
4542
Mike Christie30a6c652006-04-06 21:13:39 -05004543 err = transport_class_register(&iscsi_connection_class);
4544 if (err)
4545 goto unregister_host_class;
4546
Alex Aizman0896b752005-08-04 19:33:07 -07004547 err = transport_class_register(&iscsi_session_class);
4548 if (err)
4549 goto unregister_conn_class;
4550
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04004551 err = bus_register(&iscsi_flashnode_bus);
4552 if (err)
4553 goto unregister_session_class;
4554
Pablo Neira Ayuso9f00d972012-09-08 02:53:54 +00004555 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
Alex Aizman0896b752005-08-04 19:33:07 -07004556 if (!nls) {
4557 err = -ENOBUFS;
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04004558 goto unregister_flashnode_bus;
Alex Aizman0896b752005-08-04 19:33:07 -07004559 }
4560
Mike Christied8bf5412007-12-13 12:43:27 -06004561 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
Wei Yongjunbcab2cc2013-04-19 09:23:28 +08004562 if (!iscsi_eh_timer_workq) {
4563 err = -ENOMEM;
Mike Christied8bf5412007-12-13 12:43:27 -06004564 goto release_nls;
Wei Yongjunbcab2cc2013-04-19 09:23:28 +08004565 }
Mike Christied8bf5412007-12-13 12:43:27 -06004566
Mike Christie43a145a2006-10-16 18:09:38 -04004567 return 0;
Alex Aizman0896b752005-08-04 19:33:07 -07004568
Mike Christied8bf5412007-12-13 12:43:27 -06004569release_nls:
Denis V. Lunevb7c6ba62008-01-28 14:41:19 -08004570 netlink_kernel_release(nls);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04004571unregister_flashnode_bus:
4572 bus_unregister(&iscsi_flashnode_bus);
Alex Aizman0896b752005-08-04 19:33:07 -07004573unregister_session_class:
4574 transport_class_unregister(&iscsi_session_class);
4575unregister_conn_class:
4576 transport_class_unregister(&iscsi_connection_class);
Mike Christie30a6c652006-04-06 21:13:39 -05004577unregister_host_class:
4578 transport_class_unregister(&iscsi_host_class);
Mike Christie8d079132011-07-25 13:48:40 -05004579unregister_iface_class:
4580 class_unregister(&iscsi_iface_class);
Mike Christied82ff9be2008-05-21 15:54:13 -05004581unregister_endpoint_class:
4582 class_unregister(&iscsi_endpoint_class);
Alex Aizman0896b752005-08-04 19:33:07 -07004583unregister_transport_class:
4584 class_unregister(&iscsi_transport_class);
4585 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004586}
4587
4588static void __exit iscsi_transport_exit(void)
4589{
Mike Christied8bf5412007-12-13 12:43:27 -06004590 destroy_workqueue(iscsi_eh_timer_workq);
Denis V. Lunevb7c6ba62008-01-28 14:41:19 -08004591 netlink_kernel_release(nls);
Adheer Chandravanshic6a4bb22013-03-22 07:41:29 -04004592 bus_unregister(&iscsi_flashnode_bus);
Alex Aizman0896b752005-08-04 19:33:07 -07004593 transport_class_unregister(&iscsi_connection_class);
4594 transport_class_unregister(&iscsi_session_class);
Mike Christie30a6c652006-04-06 21:13:39 -05004595 transport_class_unregister(&iscsi_host_class);
Mike Christied82ff9be2008-05-21 15:54:13 -05004596 class_unregister(&iscsi_endpoint_class);
Mike Christie8d079132011-07-25 13:48:40 -05004597 class_unregister(&iscsi_iface_class);
Alex Aizman0896b752005-08-04 19:33:07 -07004598 class_unregister(&iscsi_transport_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004599}
4600
4601module_init(iscsi_transport_init);
4602module_exit(iscsi_transport_exit);
4603
Alex Aizman0896b752005-08-04 19:33:07 -07004604MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4605 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4606 "Alex Aizman <itn780@yahoo.com>");
4607MODULE_DESCRIPTION("iSCSI Transport Interface");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004608MODULE_LICENSE("GPL");
Mike Christief4246b32006-07-24 15:47:54 -05004609MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
Stephen Hemminger058548a2010-12-09 09:37:56 -08004610MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);