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1 // SPDX-License-Identifier: GPL-2.0-or-later

2 /*

3 * iSCSI transport class definitions

4 *

5 * Copyright (C) IBM Corporation, 2004

6 * Copyright (C) Mike Christie, 2004 - 2005

7 * Copyright (C) Dmitry Yusupov, 2004 - 2005

8 * Copyright (C) Alex Aizman, 2004 - 2005

9 */

10 #include <linux/module.h>

11 #include <linux/mutex.h>

12 #include <linux/slab.h>

13 #include <linux/bsg-lib.h>

14 #include <linux/idr.h>

15 #include <net/tcp.h>

16 #include <scsi/scsi.h>

17 #include <scsi/scsi_host.h>

18 #include <scsi/scsi_device.h>

19 #include <scsi/scsi_transport.h>

20 #include <scsi/scsi_transport_iscsi.h>

21 #include <scsi/iscsi_if.h>

22 #include <scsi/scsi_cmnd.h>

23 #include <scsi/scsi_bsg_iscsi.h>

24

25 #define ISCSI_TRANSPORT_VERSION "2.0-870"

26

27 #define ISCSI_SEND_MAX_ALLOWED 10

28

29 #define CREATE_TRACE_POINTS

30 #include <trace/events/iscsi.h>

31

32 /*

33 * Export tracepoint symbols to be used by other modules.

34 */

35 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn);

36 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh);

37 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session);

38 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp);

39 EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp);

40

41 static int dbg_session;

42 module_param_named(debug_session, dbg_session, int,

43 S_IRUGO | S_IWUSR);

44 MODULE_PARM_DESC(debug_session,

45 "Turn on debugging for sessions in scsi_transport_iscsi "

46 "module. Set to 1 to turn on, and zero to turn off. Default "

47 "is off.");

48

49 static int dbg_conn;

50 module_param_named(debug_conn, dbg_conn, int,

51 S_IRUGO | S_IWUSR);

52 MODULE_PARM_DESC(debug_conn,

53 "Turn on debugging for connections in scsi_transport_iscsi "

54 "module. Set to 1 to turn on, and zero to turn off. Default "

55 "is off.");

56

57 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \

58 do { \

59 if (dbg_session) \

60 iscsi_cls_session_printk(KERN_INFO, _session, \

61 "%s: " dbg_fmt, \

62 __func__, ##arg); \

63 iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \

64 &(_session)->dev, \

65 "%s " dbg_fmt, __func__, ##arg); \

66 } while (0);

67

68 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \

69 do { \

70 if (dbg_conn) \

71 iscsi_cls_conn_printk(KERN_INFO, _conn, \

72 "%s: " dbg_fmt, \

73 __func__, ##arg); \

74 iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \

75 &(_conn)->dev, \

76 "%s " dbg_fmt, __func__, ##arg); \

77 } while (0);

78

79 struct iscsi_internal {

80 struct scsi_transport_template t;

81 struct iscsi_transport *iscsi_transport;

82 struct list_head list;

83 struct device dev;

84

85 struct transport_container conn_cont;

86 struct transport_container session_cont;

87 };

88

89 /* Worker to perform connection failure on unresponsive connections

90 * completely in kernel space.

91 */

92 static void stop_conn_work_fn(struct work_struct *work);

93 static DECLARE_WORK(stop_conn_work, stop_conn_work_fn);

94

95 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */

96 static struct workqueue_struct *iscsi_eh_timer_workq;

97

98 static struct workqueue_struct *iscsi_destroy_workq;

99

100 static DEFINE_IDA(iscsi_sess_ida);

101 /*

102 * list of registered transports and lock that must

103 * be held while accessing list. The iscsi_transport_lock must

104 * be acquired after the rx_queue_mutex.

105 */

106 static LIST_HEAD(iscsi_transports);

107 static DEFINE_SPINLOCK(iscsi_transport_lock);

108

109 #define to_iscsi_internal(tmpl) \

110 container_of(tmpl, struct iscsi_internal, t)

111

112 #define dev_to_iscsi_internal(_dev) \

113 container_of(_dev, struct iscsi_internal, dev)

114

115 static void iscsi_transport_release(struct device *dev)

116 {

117 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);

118 kfree(priv);

119 }

120

121 /*

122 * iscsi_transport_class represents the iscsi_transports that are

123 * registered.

124 */

125 static struct class iscsi_transport_class = {

126 .name = "iscsi_transport",

127 .dev_release = iscsi_transport_release,

128 };

129

130 static ssize_t

131 show_transport_handle(struct device *dev, struct device_attribute *attr,

132 char *buf)

133 {

134 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);

135

136 if (!capable(CAP_SYS_ADMIN))

137 return -EACCES;

138 return sysfs_emit(buf, "%llu\n",

139 (unsigned long long)iscsi_handle(priv->iscsi_transport));

140 }

141 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);

142

143 #define show_transport_attr(name, format) \

144 static ssize_t \

145 show_transport_##name(struct device *dev, \

146 struct device_attribute *attr,char *buf) \

147 { \

148 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \

149 return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\

150 } \

151 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);

152

153 show_transport_attr(caps, "0x%x");

154

155 static struct attribute *iscsi_transport_attrs[] = {

156 &dev_attr_handle.attr,

157 &dev_attr_caps.attr,

158 NULL,

159 };

160

161 static struct attribute_group iscsi_transport_group = {

162 .attrs = iscsi_transport_attrs,

163 };

164

165 /*

166 * iSCSI endpoint attrs

167 */

168 #define iscsi_dev_to_endpoint(_dev) \

169 container_of(_dev, struct iscsi_endpoint, dev)

170

171 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \

172 struct device_attribute dev_attr_##_prefix##_##_name = \

173 __ATTR(_name,_mode,_show,_store)

174

175 static void iscsi_endpoint_release(struct device *dev)

176 {

177 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);

178 kfree(ep);

179 }

180

181 static struct class iscsi_endpoint_class = {

182 .name = "iscsi_endpoint",

183 .dev_release = iscsi_endpoint_release,

184 };

185

186 static ssize_t

187 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)

188 {

189 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);

190 return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id);

191 }

192 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);

193

194 static struct attribute *iscsi_endpoint_attrs[] = {

195 &dev_attr_ep_handle.attr,

196 NULL,

197 };

198

199 static struct attribute_group iscsi_endpoint_group = {

200 .attrs = iscsi_endpoint_attrs,

201 };

202

203 #define ISCSI_MAX_EPID -1

204

205 static int iscsi_match_epid(struct device *dev, const void *data)

206 {

207 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);

208 const uint64_t *epid = data;

209

210 return *epid == ep->id;

211 }

212

213 struct iscsi_endpoint *

214 iscsi_create_endpoint(int dd_size)

215 {

216 struct device *dev;

217 struct iscsi_endpoint *ep;

218 uint64_t id;

219 int err;

220

221 for (id = 1; id < ISCSI_MAX_EPID; id++) {

222 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,

223 iscsi_match_epid);

224 if (!dev)

225 break;

226 else

227 put_device(dev);

228 }

229 if (id == ISCSI_MAX_EPID) {

230 printk(KERN_ERR "Too many connections. Max supported %u\n",

231 ISCSI_MAX_EPID - 1);

232 return NULL;

233 }

234

235 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);

236 if (!ep)

237 return NULL;

238

239 ep->id = id;

240 ep->dev.class = &iscsi_endpoint_class;

241 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);

242 err = device_register(&ep->dev);

243 if (err)

244 goto free_ep;

245

246 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);

247 if (err)

248 goto unregister_dev;

249

250 if (dd_size)

251 ep->dd_data = &ep[1];

252 return ep;

253

254 unregister_dev:

255 device_unregister(&ep->dev);

256 return NULL;

257

258 free_ep:

259 kfree(ep);

260 return NULL;

261 }

262 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);

263

264 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)

265 {

266 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);

267 device_unregister(&ep->dev);

268 }

269 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);

270

271 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)

272 {

273 struct iscsi_endpoint *ep;

274 struct device *dev;

275

276 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,

277 iscsi_match_epid);

278 if (!dev)

279 return NULL;

280

281 ep = iscsi_dev_to_endpoint(dev);

282 /*

283 * we can drop this now because the interface will prevent

284 * removals and lookups from racing.

285 */

286 put_device(dev);

287 return ep;

288 }

289 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);

290

291 /*

292 * Interface to display network param to sysfs

293 */

294

295 static void iscsi_iface_release(struct device *dev)

296 {

297 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);

298 struct device *parent = iface->dev.parent;

299

300 kfree(iface);

301 put_device(parent);

302 }

303

304

305 static struct class iscsi_iface_class = {

306 .name = "iscsi_iface",

307 .dev_release = iscsi_iface_release,

308 };

309

310 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \

311 struct device_attribute dev_attr_##_prefix##_##_name = \

312 __ATTR(_name, _mode, _show, _store)

313

314 /* iface attrs show */

315 #define iscsi_iface_attr_show(type, name, param_type, param) \

316 static ssize_t \

317 show_##type##_##name(struct device *dev, struct device_attribute *attr, \

318 char *buf) \

319 { \

320 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \

321 struct iscsi_transport *t = iface->transport; \

322 return t->get_iface_param(iface, param_type, param, buf); \

323 } \

324

325 #define iscsi_iface_net_attr(type, name, param) \

326 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \

327 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);

328

329 #define iscsi_iface_attr(type, name, param) \

330 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \

331 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);

332

333 /* generic read only ipv4 attribute */

334 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);

335 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);

336 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);

337 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);

338 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,

339 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);

340 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,

341 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);

342 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);

343 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);

344 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,

345 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);

346 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,

347 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);

348 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,

349 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);

350 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,

351 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);

352 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,

353 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);

354 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,

355 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);

356 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,

357 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);

358 iscsi_iface_net_attr(ipv4_iface, fragment_disable,

359 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);

360 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,

361 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);

362 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);

363

364 /* generic read only ipv6 attribute */

365 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);

366 iscsi_iface_net_attr(ipv6_iface, link_local_addr,

367 ISCSI_NET_PARAM_IPV6_LINKLOCAL);

368 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);

369 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,

370 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);

371 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,

372 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);

373 iscsi_iface_net_attr(ipv6_iface, link_local_state,

374 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);

375 iscsi_iface_net_attr(ipv6_iface, router_state,

376 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);

377 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,

378 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);

379 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);

380 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);

381 iscsi_iface_net_attr(ipv6_iface, traffic_class,

382 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);

383 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);

384 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,

385 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);

386 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,

387 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);

388 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,

389 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);

390 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,

391 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);

392 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,

393 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);

394

395 /* common read only iface attribute */

396 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);

397 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);

398 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);

399 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);

400 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);

401 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);

402 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);

403 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);

404 iscsi_iface_net_attr(iface, tcp_nagle_disable,

405 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);

406 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);

407 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);

408 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);

409 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);

410 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);

411 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);

412

413 /* common iscsi specific settings attributes */

414 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);

415 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);

416 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);

417 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);

418 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);

419 iscsi_iface_attr(iface, data_seq_in_order,

420 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);

421 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);

422 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);

423 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);

424 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);

425 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);

426 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);

427 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);

428 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);

429 iscsi_iface_attr(iface, discovery_auth_optional,

430 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);

431 iscsi_iface_attr(iface, discovery_logout,

432 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);

433 iscsi_iface_attr(iface, strict_login_comp_en,

434 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);

435 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);

436

437 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,

438 struct attribute *attr, int i)

439 {

440 struct device *dev = container_of(kobj, struct device, kobj);

441 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);

442 struct iscsi_transport *t = iface->transport;

443 int param;

444 int param_type;

445

446 if (attr == &dev_attr_iface_enabled.attr)

447 param = ISCSI_NET_PARAM_IFACE_ENABLE;

448 else if (attr == &dev_attr_iface_vlan_id.attr)

449 param = ISCSI_NET_PARAM_VLAN_ID;

450 else if (attr == &dev_attr_iface_vlan_priority.attr)

451 param = ISCSI_NET_PARAM_VLAN_PRIORITY;

452 else if (attr == &dev_attr_iface_vlan_enabled.attr)

453 param = ISCSI_NET_PARAM_VLAN_ENABLED;

454 else if (attr == &dev_attr_iface_mtu.attr)

455 param = ISCSI_NET_PARAM_MTU;

456 else if (attr == &dev_attr_iface_port.attr)

457 param = ISCSI_NET_PARAM_PORT;

458 else if (attr == &dev_attr_iface_ipaddress_state.attr)

459 param = ISCSI_NET_PARAM_IPADDR_STATE;

460 else if (attr == &dev_attr_iface_delayed_ack_en.attr)

461 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;

462 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)

463 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;

464 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)

465 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;

466 else if (attr == &dev_attr_iface_tcp_wsf.attr)

467 param = ISCSI_NET_PARAM_TCP_WSF;

468 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)

469 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;

470 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)

471 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;

472 else if (attr == &dev_attr_iface_cache_id.attr)

473 param = ISCSI_NET_PARAM_CACHE_ID;

474 else if (attr == &dev_attr_iface_redirect_en.attr)

475 param = ISCSI_NET_PARAM_REDIRECT_EN;

476 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)

477 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;

478 else if (attr == &dev_attr_iface_header_digest.attr)

479 param = ISCSI_IFACE_PARAM_HDRDGST_EN;

480 else if (attr == &dev_attr_iface_data_digest.attr)

481 param = ISCSI_IFACE_PARAM_DATADGST_EN;

482 else if (attr == &dev_attr_iface_immediate_data.attr)

483 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;

484 else if (attr == &dev_attr_iface_initial_r2t.attr)

485 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;

486 else if (attr == &dev_attr_iface_data_seq_in_order.attr)

487 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;

488 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)

489 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;

490 else if (attr == &dev_attr_iface_erl.attr)

491 param = ISCSI_IFACE_PARAM_ERL;

492 else if (attr == &dev_attr_iface_max_recv_dlength.attr)

493 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;

494 else if (attr == &dev_attr_iface_first_burst_len.attr)

495 param = ISCSI_IFACE_PARAM_FIRST_BURST;

496 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)

497 param = ISCSI_IFACE_PARAM_MAX_R2T;

498 else if (attr == &dev_attr_iface_max_burst_len.attr)

499 param = ISCSI_IFACE_PARAM_MAX_BURST;

500 else if (attr == &dev_attr_iface_chap_auth.attr)

501 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;

502 else if (attr == &dev_attr_iface_bidi_chap.attr)

503 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;

504 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)

505 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;

506 else if (attr == &dev_attr_iface_discovery_logout.attr)

507 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;

508 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)

509 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;

510 else if (attr == &dev_attr_iface_initiator_name.attr)

511 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;

512 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {

513 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)

514 param = ISCSI_NET_PARAM_IPV4_ADDR;

515 else if (attr == &dev_attr_ipv4_iface_gateway.attr)

516 param = ISCSI_NET_PARAM_IPV4_GW;

517 else if (attr == &dev_attr_ipv4_iface_subnet.attr)

518 param = ISCSI_NET_PARAM_IPV4_SUBNET;

519 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)

520 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;

521 else if (attr ==

522 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)

523 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;

524 else if (attr ==

525 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)

526 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;

527 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)

528 param = ISCSI_NET_PARAM_IPV4_TOS_EN;

529 else if (attr == &dev_attr_ipv4_iface_tos.attr)

530 param = ISCSI_NET_PARAM_IPV4_TOS;

531 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)

532 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;

533 else if (attr ==

534 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)

535 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;

536 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)

537 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;

538 else if (attr ==

539 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)

540 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;

541 else if (attr ==

542 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)

543 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;

544 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)

545 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;

546 else if (attr ==

547 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)

548 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;

549 else if (attr ==

550 &dev_attr_ipv4_iface_fragment_disable.attr)

551 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;

552 else if (attr ==

553 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)

554 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;

555 else if (attr == &dev_attr_ipv4_iface_ttl.attr)

556 param = ISCSI_NET_PARAM_IPV4_TTL;

557 else

558 return 0;

559 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {

560 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)

561 param = ISCSI_NET_PARAM_IPV6_ADDR;

562 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)

563 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;

564 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)

565 param = ISCSI_NET_PARAM_IPV6_ROUTER;

566 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)

567 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;

568 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)

569 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;

570 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)

571 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;

572 else if (attr == &dev_attr_ipv6_iface_router_state.attr)

573 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;

574 else if (attr ==

575 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)

576 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;

577 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)

578 param = ISCSI_NET_PARAM_IPV6_MLD_EN;

579 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)

580 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;

581 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)

582 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;

583 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)

584 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;

585 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)

586 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;

587 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)

588 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;

589 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)

590 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;

591 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)

592 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;

593 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)

594 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;

595 else

596 return 0;

597 } else {

598 WARN_ONCE(1, "Invalid iface attr");

599 return 0;

600 }

601

602 switch (param) {

603 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:

604 case ISCSI_IFACE_PARAM_HDRDGST_EN:

605 case ISCSI_IFACE_PARAM_DATADGST_EN:

606 case ISCSI_IFACE_PARAM_IMM_DATA_EN:

607 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:

608 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:

609 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:

610 case ISCSI_IFACE_PARAM_ERL:

611 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:

612 case ISCSI_IFACE_PARAM_FIRST_BURST:

613 case ISCSI_IFACE_PARAM_MAX_R2T:

614 case ISCSI_IFACE_PARAM_MAX_BURST:

615 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:

616 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:

617 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:

618 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:

619 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:

620 case ISCSI_IFACE_PARAM_INITIATOR_NAME:

621 param_type = ISCSI_IFACE_PARAM;

622 break;

623 default:

624 param_type = ISCSI_NET_PARAM;

625 }

626

627 return t->attr_is_visible(param_type, param);

628 }

629

630 static struct attribute *iscsi_iface_attrs[] = {

631 &dev_attr_iface_enabled.attr,

632 &dev_attr_iface_vlan_id.attr,

633 &dev_attr_iface_vlan_priority.attr,

634 &dev_attr_iface_vlan_enabled.attr,

635 &dev_attr_ipv4_iface_ipaddress.attr,

636 &dev_attr_ipv4_iface_gateway.attr,

637 &dev_attr_ipv4_iface_subnet.attr,

638 &dev_attr_ipv4_iface_bootproto.attr,

639 &dev_attr_ipv6_iface_ipaddress.attr,

640 &dev_attr_ipv6_iface_link_local_addr.attr,

641 &dev_attr_ipv6_iface_router_addr.attr,

642 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,

643 &dev_attr_ipv6_iface_link_local_autocfg.attr,

644 &dev_attr_iface_mtu.attr,

645 &dev_attr_iface_port.attr,

646 &dev_attr_iface_ipaddress_state.attr,

647 &dev_attr_iface_delayed_ack_en.attr,

648 &dev_attr_iface_tcp_nagle_disable.attr,

649 &dev_attr_iface_tcp_wsf_disable.attr,

650 &dev_attr_iface_tcp_wsf.attr,

651 &dev_attr_iface_tcp_timer_scale.attr,

652 &dev_attr_iface_tcp_timestamp_en.attr,

653 &dev_attr_iface_cache_id.attr,

654 &dev_attr_iface_redirect_en.attr,

655 &dev_attr_iface_def_taskmgmt_tmo.attr,

656 &dev_attr_iface_header_digest.attr,

657 &dev_attr_iface_data_digest.attr,

658 &dev_attr_iface_immediate_data.attr,

659 &dev_attr_iface_initial_r2t.attr,

660 &dev_attr_iface_data_seq_in_order.attr,

661 &dev_attr_iface_data_pdu_in_order.attr,

662 &dev_attr_iface_erl.attr,

663 &dev_attr_iface_max_recv_dlength.attr,

664 &dev_attr_iface_first_burst_len.attr,

665 &dev_attr_iface_max_outstanding_r2t.attr,

666 &dev_attr_iface_max_burst_len.attr,

667 &dev_attr_iface_chap_auth.attr,

668 &dev_attr_iface_bidi_chap.attr,

669 &dev_attr_iface_discovery_auth_optional.attr,

670 &dev_attr_iface_discovery_logout.attr,

671 &dev_attr_iface_strict_login_comp_en.attr,

672 &dev_attr_iface_initiator_name.attr,

673 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,

674 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,

675 &dev_attr_ipv4_iface_tos_en.attr,

676 &dev_attr_ipv4_iface_tos.attr,

677 &dev_attr_ipv4_iface_grat_arp_en.attr,

678 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,

679 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,

680 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,

681 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,

682 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,

683 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,

684 &dev_attr_ipv4_iface_fragment_disable.attr,

685 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,

686 &dev_attr_ipv4_iface_ttl.attr,

687 &dev_attr_ipv6_iface_link_local_state.attr,

688 &dev_attr_ipv6_iface_router_state.attr,

689 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,

690 &dev_attr_ipv6_iface_mld_en.attr,

691 &dev_attr_ipv6_iface_flow_label.attr,

692 &dev_attr_ipv6_iface_traffic_class.attr,

693 &dev_attr_ipv6_iface_hop_limit.attr,

694 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,

695 &dev_attr_ipv6_iface_nd_rexmit_time.attr,

696 &dev_attr_ipv6_iface_nd_stale_tmo.attr,

697 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,

698 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,

699 NULL,

700 };

701

702 static struct attribute_group iscsi_iface_group = {

703 .attrs = iscsi_iface_attrs,

704 .is_visible = iscsi_iface_attr_is_visible,

705 };

706

707 /* convert iscsi_ipaddress_state values to ascii string name */

708 static const struct {

709 enum iscsi_ipaddress_state value;

710 char *name;

711 } iscsi_ipaddress_state_names[] = {

712 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },

713 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },

714 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },

715 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },

716 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },

717 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },

718 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },

719 };

720

721 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)

722 {

723 int i;

724 char *state = NULL;

725

726 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {

727 if (iscsi_ipaddress_state_names[i].value == port_state) {

728 state = iscsi_ipaddress_state_names[i].name;

729 break;

730 }

731 }

732 return state;

733 }

734 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);

735

736 /* convert iscsi_router_state values to ascii string name */

737 static const struct {

738 enum iscsi_router_state value;

739 char *name;

740 } iscsi_router_state_names[] = {

741 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },

742 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },

743 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },

744 {ISCSI_ROUTER_STATE_STALE, "Stale" },

745 };

746

747 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)

748 {

749 int i;

750 char *state = NULL;

751

752 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {

753 if (iscsi_router_state_names[i].value == router_state) {

754 state = iscsi_router_state_names[i].name;

755 break;

756 }

757 }

758 return state;

759 }

760 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);

761

762 struct iscsi_iface *

763 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,

764 uint32_t iface_type, uint32_t iface_num, int dd_size)

765 {

766 struct iscsi_iface *iface;

767 int err;

768

769 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);

770 if (!iface)

771 return NULL;

772

773 iface->transport = transport;

774 iface->iface_type = iface_type;

775 iface->iface_num = iface_num;

776 iface->dev.release = iscsi_iface_release;

777 iface->dev.class = &iscsi_iface_class;

778 /* parent reference released in iscsi_iface_release */

779 iface->dev.parent = get_device(&shost->shost_gendev);

780 if (iface_type == ISCSI_IFACE_TYPE_IPV4)

781 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,

782 iface_num);

783 else

784 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,

785 iface_num);

786

787 err = device_register(&iface->dev);

788 if (err)

789 goto free_iface;

790

791 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);

792 if (err)

793 goto unreg_iface;

794

795 if (dd_size)

796 iface->dd_data = &iface[1];

797 return iface;

798

799 unreg_iface:

800 device_unregister(&iface->dev);

801 return NULL;

802

803 free_iface:

804 put_device(iface->dev.parent);

805 kfree(iface);

806 return NULL;

807 }

808 EXPORT_SYMBOL_GPL(iscsi_create_iface);

809

810 void iscsi_destroy_iface(struct iscsi_iface *iface)

811 {

812 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);

813 device_unregister(&iface->dev);

814 }

815 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);

816

817 /*

818 * Interface to display flash node params to sysfs

819 */

820

821 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \

822 struct device_attribute dev_attr_##_prefix##_##_name = \

823 __ATTR(_name, _mode, _show, _store)

824

825 /* flash node session attrs show */

826 #define iscsi_flashnode_sess_attr_show(type, name, param) \

827 static ssize_t \

828 show_##type##_##name(struct device *dev, struct device_attribute *attr, \

829 char *buf) \

830 { \

831 struct iscsi_bus_flash_session *fnode_sess = \

832 iscsi_dev_to_flash_session(dev);\

833 struct iscsi_transport *t = fnode_sess->transport; \

834 return t->get_flashnode_param(fnode_sess, param, buf); \

835 } \

836

837

838 #define iscsi_flashnode_sess_attr(type, name, param) \

839 iscsi_flashnode_sess_attr_show(type, name, param) \

840 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \

841 show_##type##_##name, NULL);

842

843 /* Flash node session attributes */

844

845 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,

846 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);

847 iscsi_flashnode_sess_attr(fnode, discovery_session,

848 ISCSI_FLASHNODE_DISCOVERY_SESS);

849 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);

850 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);

851 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);

852 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);

853 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,

854 ISCSI_FLASHNODE_DATASEQ_INORDER);

855 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,

856 ISCSI_FLASHNODE_PDU_INORDER);

857 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);

858 iscsi_flashnode_sess_attr(fnode, discovery_logout,

859 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);

860 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);

861 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,

862 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);

863 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);

864 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);

865 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);

866 iscsi_flashnode_sess_attr(fnode, def_time2retain,

867 ISCSI_FLASHNODE_DEF_TIME2RETAIN);

868 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);

869 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);

870 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);

871 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);

872 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,

873 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);

874 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);

875 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);

876 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);

877 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,

878 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);

879 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,

880 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);

881 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);

882 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);

883 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);

884 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);

885 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);

886 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);

887 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);

888

889 static struct attribute *iscsi_flashnode_sess_attrs[] = {

890 &dev_attr_fnode_auto_snd_tgt_disable.attr,

891 &dev_attr_fnode_discovery_session.attr,

892 &dev_attr_fnode_portal_type.attr,

893 &dev_attr_fnode_entry_enable.attr,

894 &dev_attr_fnode_immediate_data.attr,

895 &dev_attr_fnode_initial_r2t.attr,

896 &dev_attr_fnode_data_seq_in_order.attr,

897 &dev_attr_fnode_data_pdu_in_order.attr,

898 &dev_attr_fnode_chap_auth.attr,

899 &dev_attr_fnode_discovery_logout.attr,

900 &dev_attr_fnode_bidi_chap.attr,

901 &dev_attr_fnode_discovery_auth_optional.attr,

902 &dev_attr_fnode_erl.attr,

903 &dev_attr_fnode_first_burst_len.attr,

904 &dev_attr_fnode_def_time2wait.attr,

905 &dev_attr_fnode_def_time2retain.attr,

906 &dev_attr_fnode_max_outstanding_r2t.attr,

907 &dev_attr_fnode_isid.attr,

908 &dev_attr_fnode_tsid.attr,

909 &dev_attr_fnode_max_burst_len.attr,

910 &dev_attr_fnode_def_taskmgmt_tmo.attr,

911 &dev_attr_fnode_targetalias.attr,

912 &dev_attr_fnode_targetname.attr,

913 &dev_attr_fnode_tpgt.attr,

914 &dev_attr_fnode_discovery_parent_idx.attr,

915 &dev_attr_fnode_discovery_parent_type.attr,

916 &dev_attr_fnode_chap_in_idx.attr,

917 &dev_attr_fnode_chap_out_idx.attr,

918 &dev_attr_fnode_username.attr,

919 &dev_attr_fnode_username_in.attr,

920 &dev_attr_fnode_password.attr,

921 &dev_attr_fnode_password_in.attr,

922 &dev_attr_fnode_is_boot_target.attr,

923 NULL,

924 };

925

926 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,

927 struct attribute *attr,

928 int i)

929 {

930 struct device *dev = container_of(kobj, struct device, kobj);

931 struct iscsi_bus_flash_session *fnode_sess =

932 iscsi_dev_to_flash_session(dev);

933 struct iscsi_transport *t = fnode_sess->transport;

934 int param;

935

936 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {

937 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;

938 } else if (attr == &dev_attr_fnode_discovery_session.attr) {

939 param = ISCSI_FLASHNODE_DISCOVERY_SESS;

940 } else if (attr == &dev_attr_fnode_portal_type.attr) {

941 param = ISCSI_FLASHNODE_PORTAL_TYPE;

942 } else if (attr == &dev_attr_fnode_entry_enable.attr) {

943 param = ISCSI_FLASHNODE_ENTRY_EN;

944 } else if (attr == &dev_attr_fnode_immediate_data.attr) {

945 param = ISCSI_FLASHNODE_IMM_DATA_EN;

946 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {

947 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;

948 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {

949 param = ISCSI_FLASHNODE_DATASEQ_INORDER;

950 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {

951 param = ISCSI_FLASHNODE_PDU_INORDER;

952 } else if (attr == &dev_attr_fnode_chap_auth.attr) {

953 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;

954 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {

955 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;

956 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {

957 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;

958 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {

959 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;

960 } else if (attr == &dev_attr_fnode_erl.attr) {

961 param = ISCSI_FLASHNODE_ERL;

962 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {

963 param = ISCSI_FLASHNODE_FIRST_BURST;

964 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {

965 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;

966 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {

967 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;

968 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {

969 param = ISCSI_FLASHNODE_MAX_R2T;

970 } else if (attr == &dev_attr_fnode_isid.attr) {

971 param = ISCSI_FLASHNODE_ISID;

972 } else if (attr == &dev_attr_fnode_tsid.attr) {

973 param = ISCSI_FLASHNODE_TSID;

974 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {

975 param = ISCSI_FLASHNODE_MAX_BURST;

976 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {

977 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;

978 } else if (attr == &dev_attr_fnode_targetalias.attr) {

979 param = ISCSI_FLASHNODE_ALIAS;

980 } else if (attr == &dev_attr_fnode_targetname.attr) {

981 param = ISCSI_FLASHNODE_NAME;

982 } else if (attr == &dev_attr_fnode_tpgt.attr) {

983 param = ISCSI_FLASHNODE_TPGT;

984 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {

985 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;

986 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {

987 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;

988 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {

989 param = ISCSI_FLASHNODE_CHAP_IN_IDX;

990 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {

991 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;

992 } else if (attr == &dev_attr_fnode_username.attr) {

993 param = ISCSI_FLASHNODE_USERNAME;

994 } else if (attr == &dev_attr_fnode_username_in.attr) {

995 param = ISCSI_FLASHNODE_USERNAME_IN;

996 } else if (attr == &dev_attr_fnode_password.attr) {

997 param = ISCSI_FLASHNODE_PASSWORD;

998 } else if (attr == &dev_attr_fnode_password_in.attr) {

999 param = ISCSI_FLASHNODE_PASSWORD_IN;

1000 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {

1001 param = ISCSI_FLASHNODE_IS_BOOT_TGT;

1002 } else {

1003 WARN_ONCE(1, "Invalid flashnode session attr");

1004 return 0;

1005 }

1006

1007 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);

1008 }

1009

1010 static struct attribute_group iscsi_flashnode_sess_attr_group = {

1011 .attrs = iscsi_flashnode_sess_attrs,

1012 .is_visible = iscsi_flashnode_sess_attr_is_visible,

1013 };

1014

1015 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {

1016 &iscsi_flashnode_sess_attr_group,

1017 NULL,

1018 };

1019

1020 static void iscsi_flashnode_sess_release(struct device *dev)

1021 {

1022 struct iscsi_bus_flash_session *fnode_sess =

1023 iscsi_dev_to_flash_session(dev);

1024

1025 kfree(fnode_sess->targetname);

1026 kfree(fnode_sess->targetalias);

1027 kfree(fnode_sess->portal_type);

1028 kfree(fnode_sess);

1029 }

1030

1031 static const struct device_type iscsi_flashnode_sess_dev_type = {

1032 .name = "iscsi_flashnode_sess_dev_type",

1033 .groups = iscsi_flashnode_sess_attr_groups,

1034 .release = iscsi_flashnode_sess_release,

1035 };

1036

1037 /* flash node connection attrs show */

1038 #define iscsi_flashnode_conn_attr_show(type, name, param) \

1039 static ssize_t \

1040 show_##type##_##name(struct device *dev, struct device_attribute *attr, \

1041 char *buf) \

1042 { \

1043 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\

1044 struct iscsi_bus_flash_session *fnode_sess = \

1045 iscsi_flash_conn_to_flash_session(fnode_conn);\

1046 struct iscsi_transport *t = fnode_conn->transport; \

1047 return t->get_flashnode_param(fnode_sess, param, buf); \

1048 } \

1049

1050

1051 #define iscsi_flashnode_conn_attr(type, name, param) \

1052 iscsi_flashnode_conn_attr_show(type, name, param) \

1053 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \

1054 show_##type##_##name, NULL);

1055

1056 /* Flash node connection attributes */

1057

1058 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,

1059 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);

1060 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);

1061 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);

1062 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);

1063 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,

1064 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);

1065 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,

1066 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);

1067 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,

1068 ISCSI_FLASHNODE_TCP_WSF_DISABLE);

1069 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,

1070 ISCSI_FLASHNODE_TCP_TIMER_SCALE);

1071 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,

1072 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);

1073 iscsi_flashnode_conn_attr(fnode, fragment_disable,

1074 ISCSI_FLASHNODE_IP_FRAG_DISABLE);

1075 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);

1076 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);

1077 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);

1078 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,

1079 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);

1080 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,

1081 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);

1082 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);

1083 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);

1084 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);

1085 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,

1086 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);

1087 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,

1088 ISCSI_FLASHNODE_REDIRECT_IPADDR);

1089 iscsi_flashnode_conn_attr(fnode, max_segment_size,

1090 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);

1091 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,

1092 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);

1093 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);

1094 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);

1095 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);

1096 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);

1097

1098 static struct attribute *iscsi_flashnode_conn_attrs[] = {

1099 &dev_attr_fnode_is_fw_assigned_ipv6.attr,

1100 &dev_attr_fnode_header_digest.attr,

1101 &dev_attr_fnode_data_digest.attr,

1102 &dev_attr_fnode_snack_req.attr,

1103 &dev_attr_fnode_tcp_timestamp_stat.attr,

1104 &dev_attr_fnode_tcp_nagle_disable.attr,

1105 &dev_attr_fnode_tcp_wsf_disable.attr,

1106 &dev_attr_fnode_tcp_timer_scale.attr,

1107 &dev_attr_fnode_tcp_timestamp_enable.attr,

1108 &dev_attr_fnode_fragment_disable.attr,

1109 &dev_attr_fnode_max_recv_dlength.attr,

1110 &dev_attr_fnode_max_xmit_dlength.attr,

1111 &dev_attr_fnode_keepalive_tmo.attr,

1112 &dev_attr_fnode_port.attr,

1113 &dev_attr_fnode_ipaddress.attr,

1114 &dev_attr_fnode_redirect_ipaddr.attr,

1115 &dev_attr_fnode_max_segment_size.attr,

1116 &dev_attr_fnode_local_port.attr,

1117 &dev_attr_fnode_ipv4_tos.attr,

1118 &dev_attr_fnode_ipv6_traffic_class.attr,

1119 &dev_attr_fnode_ipv6_flow_label.attr,

1120 &dev_attr_fnode_link_local_ipv6.attr,

1121 &dev_attr_fnode_tcp_xmit_wsf.attr,

1122 &dev_attr_fnode_tcp_recv_wsf.attr,

1123 &dev_attr_fnode_statsn.attr,

1124 &dev_attr_fnode_exp_statsn.attr,

1125 NULL,

1126 };

1127

1128 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,

1129 struct attribute *attr,

1130 int i)

1131 {

1132 struct device *dev = container_of(kobj, struct device, kobj);

1133 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);

1134 struct iscsi_transport *t = fnode_conn->transport;

1135 int param;

1136

1137 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {

1138 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;

1139 } else if (attr == &dev_attr_fnode_header_digest.attr) {

1140 param = ISCSI_FLASHNODE_HDR_DGST_EN;

1141 } else if (attr == &dev_attr_fnode_data_digest.attr) {

1142 param = ISCSI_FLASHNODE_DATA_DGST_EN;

1143 } else if (attr == &dev_attr_fnode_snack_req.attr) {

1144 param = ISCSI_FLASHNODE_SNACK_REQ_EN;

1145 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {

1146 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;

1147 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {

1148 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;

1149 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {

1150 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;

1151 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {

1152 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;

1153 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {

1154 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;

1155 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {

1156 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;

1157 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {

1158 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;

1159 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {

1160 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;

1161 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {

1162 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;

1163 } else if (attr == &dev_attr_fnode_port.attr) {

1164 param = ISCSI_FLASHNODE_PORT;

1165 } else if (attr == &dev_attr_fnode_ipaddress.attr) {

1166 param = ISCSI_FLASHNODE_IPADDR;

1167 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {

1168 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;

1169 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {

1170 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;

1171 } else if (attr == &dev_attr_fnode_local_port.attr) {

1172 param = ISCSI_FLASHNODE_LOCAL_PORT;

1173 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {

1174 param = ISCSI_FLASHNODE_IPV4_TOS;

1175 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {

1176 param = ISCSI_FLASHNODE_IPV6_TC;

1177 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {

1178 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;

1179 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {

1180 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;

1181 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {

1182 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;

1183 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {

1184 param = ISCSI_FLASHNODE_TCP_RECV_WSF;

1185 } else if (attr == &dev_attr_fnode_statsn.attr) {

1186 param = ISCSI_FLASHNODE_STATSN;

1187 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {

1188 param = ISCSI_FLASHNODE_EXP_STATSN;

1189 } else {

1190 WARN_ONCE(1, "Invalid flashnode connection attr");

1191 return 0;

1192 }

1193

1194 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);

1195 }

1196

1197 static struct attribute_group iscsi_flashnode_conn_attr_group = {

1198 .attrs = iscsi_flashnode_conn_attrs,

1199 .is_visible = iscsi_flashnode_conn_attr_is_visible,

1200 };

1201

1202 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {

1203 &iscsi_flashnode_conn_attr_group,

1204 NULL,

1205 };

1206

1207 static void iscsi_flashnode_conn_release(struct device *dev)

1208 {

1209 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);

1210

1211 kfree(fnode_conn->ipaddress);

1212 kfree(fnode_conn->redirect_ipaddr);

1213 kfree(fnode_conn->link_local_ipv6_addr);

1214 kfree(fnode_conn);

1215 }

1216

1217 static const struct device_type iscsi_flashnode_conn_dev_type = {

1218 .name = "iscsi_flashnode_conn_dev_type",

1219 .groups = iscsi_flashnode_conn_attr_groups,

1220 .release = iscsi_flashnode_conn_release,

1221 };

1222

1223 static struct bus_type iscsi_flashnode_bus;

1224

1225 int iscsi_flashnode_bus_match(struct device *dev,

1226 struct device_driver *drv)

1227 {

1228 if (dev->bus == &iscsi_flashnode_bus)

1229 return 1;

1230 return 0;

1231 }

1232 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);

1233

1234 static struct bus_type iscsi_flashnode_bus = {

1235 .name = "iscsi_flashnode",

1236 .match = &iscsi_flashnode_bus_match,

1237 };

1238

1239 /**

1240 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs

1241 * @shost: pointer to host data

1242 * @index: index of flashnode to add in sysfs

1243 * @transport: pointer to transport data

1244 * @dd_size: total size to allocate

1245 *

1246 * Adds a sysfs entry for the flashnode session attributes

1247 *

1248 * Returns:

1249 * pointer to allocated flashnode sess on success

1250 * %NULL on failure

1251 */

1252 struct iscsi_bus_flash_session *

1253 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,

1254 struct iscsi_transport *transport,

1255 int dd_size)

1256 {

1257 struct iscsi_bus_flash_session *fnode_sess;

1258 int err;

1259

1260 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);

1261 if (!fnode_sess)

1262 return NULL;

1263

1264 fnode_sess->transport = transport;

1265 fnode_sess->target_id = index;

1266 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;

1267 fnode_sess->dev.bus = &iscsi_flashnode_bus;

1268 fnode_sess->dev.parent = &shost->shost_gendev;

1269 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",

1270 shost->host_no, index);

1271

1272 err = device_register(&fnode_sess->dev);

1273 if (err)

1274 goto free_fnode_sess;

1275

1276 if (dd_size)

1277 fnode_sess->dd_data = &fnode_sess[1];

1278

1279 return fnode_sess;

1280

1281 free_fnode_sess:

1282 kfree(fnode_sess);

1283 return NULL;

1284 }

1285 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);

1286

1287 /**

1288 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs

1289 * @shost: pointer to host data

1290 * @fnode_sess: pointer to the parent flashnode session entry

1291 * @transport: pointer to transport data

1292 * @dd_size: total size to allocate

1293 *

1294 * Adds a sysfs entry for the flashnode connection attributes

1295 *

1296 * Returns:

1297 * pointer to allocated flashnode conn on success

1298 * %NULL on failure

1299 */

1300 struct iscsi_bus_flash_conn *

1301 iscsi_create_flashnode_conn(struct Scsi_Host *shost,

1302 struct iscsi_bus_flash_session *fnode_sess,

1303 struct iscsi_transport *transport,

1304 int dd_size)

1305 {

1306 struct iscsi_bus_flash_conn *fnode_conn;

1307 int err;

1308

1309 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);

1310 if (!fnode_conn)

1311 return NULL;

1312

1313 fnode_conn->transport = transport;

1314 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;

1315 fnode_conn->dev.bus = &iscsi_flashnode_bus;

1316 fnode_conn->dev.parent = &fnode_sess->dev;

1317 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",

1318 shost->host_no, fnode_sess->target_id);

1319

1320 err = device_register(&fnode_conn->dev);

1321 if (err)

1322 goto free_fnode_conn;

1323

1324 if (dd_size)

1325 fnode_conn->dd_data = &fnode_conn[1];

1326

1327 return fnode_conn;

1328

1329 free_fnode_conn:

1330 kfree(fnode_conn);

1331 return NULL;

1332 }

1333 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);

1334

1335 /**

1336 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn

1337 * @dev: device to verify

1338 * @data: pointer to data containing value to use for verification

1339 *

1340 * Verifies if the passed device is flashnode conn device

1341 *

1342 * Returns:

1343 * 1 on success

1344 * 0 on failure

1345 */

1346 static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)

1347 {

1348 return dev->bus == &iscsi_flashnode_bus;

1349 }

1350

1351 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)

1352 {

1353 device_unregister(&fnode_conn->dev);

1354 return 0;

1355 }

1356

1357 static int flashnode_match_index(struct device *dev, void *data)

1358 {

1359 struct iscsi_bus_flash_session *fnode_sess = NULL;

1360 int ret = 0;

1361

1362 if (!iscsi_flashnode_bus_match(dev, NULL))

1363 goto exit_match_index;

1364

1365 fnode_sess = iscsi_dev_to_flash_session(dev);

1366 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;

1367

1368 exit_match_index:

1369 return ret;

1370 }

1371

1372 /**

1373 * iscsi_get_flashnode_by_index -finds flashnode session entry by index

1374 * @shost: pointer to host data

1375 * @idx: index to match

1376 *

1377 * Finds the flashnode session object for the passed index

1378 *

1379 * Returns:

1380 * pointer to found flashnode session object on success

1381 * %NULL on failure

1382 */

1383 static struct iscsi_bus_flash_session *

1384 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)

1385 {

1386 struct iscsi_bus_flash_session *fnode_sess = NULL;

1387 struct device *dev;

1388

1389 dev = device_find_child(&shost->shost_gendev, &idx,

1390 flashnode_match_index);

1391 if (dev)

1392 fnode_sess = iscsi_dev_to_flash_session(dev);

1393

1394 return fnode_sess;

1395 }

1396

1397 /**

1398 * iscsi_find_flashnode_sess - finds flashnode session entry

1399 * @shost: pointer to host data

1400 * @data: pointer to data containing value to use for comparison

1401 * @fn: function pointer that does actual comparison

1402 *

1403 * Finds the flashnode session object comparing the data passed using logic

1404 * defined in passed function pointer

1405 *

1406 * Returns:

1407 * pointer to found flashnode session device object on success

1408 * %NULL on failure

1409 */

1410 struct device *

1411 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,

1412 int (*fn)(struct device *dev, void *data))

1413 {

1414 return device_find_child(&shost->shost_gendev, data, fn);

1415 }

1416 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);

1417

1418 /**

1419 * iscsi_find_flashnode_conn - finds flashnode connection entry

1420 * @fnode_sess: pointer to parent flashnode session entry

1421 *

1422 * Finds the flashnode connection object comparing the data passed using logic

1423 * defined in passed function pointer

1424 *

1425 * Returns:

1426 * pointer to found flashnode connection device object on success

1427 * %NULL on failure

1428 */

1429 struct device *

1430 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)

1431 {

1432 return device_find_child(&fnode_sess->dev, NULL,

1433 iscsi_is_flashnode_conn_dev);

1434 }

1435 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);

1436

1437 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)

1438 {

1439 if (!iscsi_is_flashnode_conn_dev(dev, NULL))

1440 return 0;

1441

1442 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));

1443 }

1444

1445 /**

1446 * iscsi_destroy_flashnode_sess - destroy flashnode session entry

1447 * @fnode_sess: pointer to flashnode session entry to be destroyed

1448 *

1449 * Deletes the flashnode session entry and all children flashnode connection

1450 * entries from sysfs

1451 */

1452 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)

1453 {

1454 int err;

1455

1456 err = device_for_each_child(&fnode_sess->dev, NULL,

1457 iscsi_iter_destroy_flashnode_conn_fn);

1458 if (err)

1459 pr_err("Could not delete all connections for %s. Error %d.\n",

1460 fnode_sess->dev.kobj.name, err);

1461

1462 device_unregister(&fnode_sess->dev);

1463 }

1464 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);

1465

1466 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)

1467 {

1468 if (!iscsi_flashnode_bus_match(dev, NULL))

1469 return 0;

1470

1471 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));

1472 return 0;

1473 }

1474

1475 /**

1476 * iscsi_destroy_all_flashnode - destroy all flashnode session entries

1477 * @shost: pointer to host data

1478 *

1479 * Destroys all the flashnode session entries and all corresponding children

1480 * flashnode connection entries from sysfs

1481 */

1482 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)

1483 {

1484 device_for_each_child(&shost->shost_gendev, NULL,

1485 iscsi_iter_destroy_flashnode_fn);

1486 }

1487 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);

1488

1489 /*

1490 * BSG support

1491 */

1492 /**

1493 * iscsi_bsg_host_dispatch - Dispatch command to LLD.

1494 * @job: bsg job to be processed

1495 */

1496 static int iscsi_bsg_host_dispatch(struct bsg_job *job)

1497 {

1498 struct Scsi_Host *shost = iscsi_job_to_shost(job);

1499 struct iscsi_bsg_request *req = job->request;

1500 struct iscsi_bsg_reply *reply = job->reply;

1501 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);

1502 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */

1503 int ret;

1504

1505 /* check if we have the msgcode value at least */

1506 if (job->request_len < sizeof(uint32_t)) {

1507 ret = -ENOMSG;

1508 goto fail_host_msg;

1509 }

1510

1511 /* Validate the host command */

1512 switch (req->msgcode) {

1513 case ISCSI_BSG_HST_VENDOR:

1514 cmdlen += sizeof(struct iscsi_bsg_host_vendor);

1515 if ((shost->hostt->vendor_id == 0L) ||

1516 (req->rqst_data.h_vendor.vendor_id !=

1517 shost->hostt->vendor_id)) {

1518 ret = -ESRCH;

1519 goto fail_host_msg;

1520 }

1521 break;

1522 default:

1523 ret = -EBADR;

1524 goto fail_host_msg;

1525 }

1526

1527 /* check if we really have all the request data needed */

1528 if (job->request_len < cmdlen) {

1529 ret = -ENOMSG;

1530 goto fail_host_msg;

1531 }

1532

1533 ret = i->iscsi_transport->bsg_request(job);

1534 if (!ret)

1535 return 0;

1536

1537 fail_host_msg:

1538 /* return the errno failure code as the only status */

1539 BUG_ON(job->reply_len < sizeof(uint32_t));

1540 reply->reply_payload_rcv_len = 0;

1541 reply->result = ret;

1542 job->reply_len = sizeof(uint32_t);

1543 bsg_job_done(job, ret, 0);

1544 return 0;

1545 }

1546

1547 /**

1548 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests

1549 * @shost: shost for iscsi_host

1550 * @ihost: iscsi_cls_host adding the structures to

1551 */

1552 static int

1553 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)

1554 {

1555 struct device *dev = &shost->shost_gendev;

1556 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);

1557 struct request_queue *q;

1558 char bsg_name[20];

1559

1560 if (!i->iscsi_transport->bsg_request)

1561 return -ENOTSUPP;

1562

1563 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);

1564 q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0);

1565 if (IS_ERR(q)) {

1566 shost_printk(KERN_ERR, shost, "bsg interface failed to "

1567 "initialize - no request queue\n");

1568 return PTR_ERR(q);

1569 }

1570 __scsi_init_queue(shost, q);

1571

1572 ihost->bsg_q = q;

1573 return 0;

1574 }

1575

1576 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,

1577 struct device *cdev)

1578 {

1579 struct Scsi_Host *shost = dev_to_shost(dev);

1580 struct iscsi_cls_host *ihost = shost->shost_data;

1581

1582 memset(ihost, 0, sizeof(*ihost));

1583 atomic_set(&ihost->nr_scans, 0);

1584 mutex_init(&ihost->mutex);

1585

1586 iscsi_bsg_host_add(shost, ihost);

1587 /* ignore any bsg add error - we just can't do sgio */

1588

1589 return 0;

1590 }

1591

1592 static int iscsi_remove_host(struct transport_container *tc,

1593 struct device *dev, struct device *cdev)

1594 {

1595 struct Scsi_Host *shost = dev_to_shost(dev);

1596 struct iscsi_cls_host *ihost = shost->shost_data;

1597

1598 bsg_remove_queue(ihost->bsg_q);

1599 return 0;

1600 }

1601

1602 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,

1603 "iscsi_host",

1604 iscsi_setup_host,

1605 iscsi_remove_host,

1606 NULL);

1607

1608 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,

1609 "iscsi_session",

1610 NULL,

1611 NULL,

1612 NULL);

1613

1614 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,

1615 "iscsi_connection",

1616 NULL,

1617 NULL,

1618 NULL);

1619

1620 static struct sock *nls;

1621 static DEFINE_MUTEX(rx_queue_mutex);

1622

1623 /*

1624 * conn_mutex protects the {start,bind,stop,destroy}_conn from racing

1625 * against the kernel stop_connection recovery mechanism

1626 */

1627 static DEFINE_MUTEX(conn_mutex);

1628

1629 static LIST_HEAD(sesslist);

1630 static DEFINE_SPINLOCK(sesslock);

1631 static LIST_HEAD(connlist);

1632 static LIST_HEAD(connlist_err);

1633 static DEFINE_SPINLOCK(connlock);

1634

1635 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)

1636 {

1637 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);

1638 return sess->sid;

1639 }

1640

1641 /*

1642 * Returns the matching session to a given sid

1643 */

1644 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)

1645 {

1646 unsigned long flags;

1647 struct iscsi_cls_session *sess;

1648

1649 spin_lock_irqsave(&sesslock, flags);

1650 list_for_each_entry(sess, &sesslist, sess_list) {

1651 if (sess->sid == sid) {

1652 spin_unlock_irqrestore(&sesslock, flags);

1653 return sess;

1654 }

1655 }

1656 spin_unlock_irqrestore(&sesslock, flags);

1657 return NULL;

1658 }

1659

1660 /*

1661 * Returns the matching connection to a given sid / cid tuple

1662 */

1663 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)

1664 {

1665 unsigned long flags;

1666 struct iscsi_cls_conn *conn;

1667

1668 spin_lock_irqsave(&connlock, flags);

1669 list_for_each_entry(conn, &connlist, conn_list) {

1670 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {

1671 spin_unlock_irqrestore(&connlock, flags);

1672 return conn;

1673 }

1674 }

1675 spin_unlock_irqrestore(&connlock, flags);

1676 return NULL;

1677 }

1678

1679 /*

1680 * The following functions can be used by LLDs that allocate

1681 * their own scsi_hosts or by software iscsi LLDs

1682 */

1683 static struct {

1684 int value;

1685 char *name;

1686 } iscsi_session_state_names[] = {

1687 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },

1688 { ISCSI_SESSION_FAILED, "FAILED" },

1689 { ISCSI_SESSION_FREE, "FREE" },

1690 };

1691

1692 static const char *iscsi_session_state_name(int state)

1693 {

1694 int i;

1695 char *name = NULL;

1696

1697 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {

1698 if (iscsi_session_state_names[i].value == state) {

1699 name = iscsi_session_state_names[i].name;

1700 break;

1701 }

1702 }

1703 return name;

1704 }

1705

1706 int iscsi_session_chkready(struct iscsi_cls_session *session)

1707 {

1708 int err;

1709

1710 switch (session->state) {

1711 case ISCSI_SESSION_LOGGED_IN:

1712 err = 0;

1713 break;

1714 case ISCSI_SESSION_FAILED:

1715 err = DID_IMM_RETRY << 16;

1716 break;

1717 case ISCSI_SESSION_FREE:

1718 err = DID_TRANSPORT_FAILFAST << 16;

1719 break;

1720 default:

1721 err = DID_NO_CONNECT << 16;

1722 break;

1723 }

1724 return err;

1725 }

1726 EXPORT_SYMBOL_GPL(iscsi_session_chkready);

1727

1728 int iscsi_is_session_online(struct iscsi_cls_session *session)

1729 {

1730 unsigned long flags;

1731 int ret = 0;

1732

1733 spin_lock_irqsave(&session->lock, flags);

1734 if (session->state == ISCSI_SESSION_LOGGED_IN)

1735 ret = 1;

1736 spin_unlock_irqrestore(&session->lock, flags);

1737 return ret;

1738 }

1739 EXPORT_SYMBOL_GPL(iscsi_is_session_online);

1740

1741 static void iscsi_session_release(struct device *dev)

1742 {

1743 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);

1744 struct Scsi_Host *shost;

1745

1746 shost = iscsi_session_to_shost(session);

1747 scsi_host_put(shost);

1748 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");

1749 kfree(session);

1750 }

1751

1752 int iscsi_is_session_dev(const struct device *dev)

1753 {

1754 return dev->release == iscsi_session_release;

1755 }

1756 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);

1757

1758 static int iscsi_iter_session_fn(struct device *dev, void *data)

1759 {

1760 void (* fn) (struct iscsi_cls_session *) = data;

1761

1762 if (!iscsi_is_session_dev(dev))

1763 return 0;

1764 fn(iscsi_dev_to_session(dev));

1765 return 0;

1766 }

1767

1768 void iscsi_host_for_each_session(struct Scsi_Host *shost,

1769 void (*fn)(struct iscsi_cls_session *))

1770 {

1771 device_for_each_child(&shost->shost_gendev, fn,

1772 iscsi_iter_session_fn);

1773 }

1774 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);

1775

1776 /**

1777 * iscsi_scan_finished - helper to report when running scans are done

1778 * @shost: scsi host

1779 * @time: scan run time

1780 *

1781 * This function can be used by drives like qla4xxx to report to the scsi

1782 * layer when the scans it kicked off at module load time are done.

1783 */

1784 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)

1785 {

1786 struct iscsi_cls_host *ihost = shost->shost_data;

1787 /*

1788 * qla4xxx will have kicked off some session unblocks before calling

1789 * scsi_scan_host, so just wait for them to complete.

1790 */

1791 return !atomic_read(&ihost->nr_scans);

1792 }

1793 EXPORT_SYMBOL_GPL(iscsi_scan_finished);

1794

1795 struct iscsi_scan_data {

1796 unsigned int channel;

1797 unsigned int id;

1798 u64 lun;

1799 enum scsi_scan_mode rescan;

1800 };

1801

1802 static int iscsi_user_scan_session(struct device *dev, void *data)

1803 {

1804 struct iscsi_scan_data *scan_data = data;

1805 struct iscsi_cls_session *session;

1806 struct Scsi_Host *shost;

1807 struct iscsi_cls_host *ihost;

1808 unsigned long flags;

1809 unsigned int id;

1810

1811 if (!iscsi_is_session_dev(dev))

1812 return 0;

1813

1814 session = iscsi_dev_to_session(dev);

1815

1816 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");

1817

1818 shost = iscsi_session_to_shost(session);

1819 ihost = shost->shost_data;

1820

1821 mutex_lock(&ihost->mutex);

1822 spin_lock_irqsave(&session->lock, flags);

1823 if (session->state != ISCSI_SESSION_LOGGED_IN) {

1824 spin_unlock_irqrestore(&session->lock, flags);

1825 goto user_scan_exit;

1826 }

1827 id = session->target_id;

1828 spin_unlock_irqrestore(&session->lock, flags);

1829

1830 if (id != ISCSI_MAX_TARGET) {

1831 if ((scan_data->channel == SCAN_WILD_CARD ||

1832 scan_data->channel == 0) &&

1833 (scan_data->id == SCAN_WILD_CARD ||

1834 scan_data->id == id))

1835 scsi_scan_target(&session->dev, 0, id,

1836 scan_data->lun, scan_data->rescan);

1837 }

1838

1839 user_scan_exit:

1840 mutex_unlock(&ihost->mutex);

1841 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");

1842 return 0;

1843 }

1844

1845 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,

1846 uint id, u64 lun)

1847 {

1848 struct iscsi_scan_data scan_data;

1849

1850 scan_data.channel = channel;

1851 scan_data.id = id;

1852 scan_data.lun = lun;

1853 scan_data.rescan = SCSI_SCAN_MANUAL;

1854

1855 return device_for_each_child(&shost->shost_gendev, &scan_data,

1856 iscsi_user_scan_session);

1857 }

1858

1859 static void iscsi_scan_session(struct work_struct *work)

1860 {

1861 struct iscsi_cls_session *session =

1862 container_of(work, struct iscsi_cls_session, scan_work);

1863 struct Scsi_Host *shost = iscsi_session_to_shost(session);

1864 struct iscsi_cls_host *ihost = shost->shost_data;

1865 struct iscsi_scan_data scan_data;

1866

1867 scan_data.channel = 0;

1868 scan_data.id = SCAN_WILD_CARD;

1869 scan_data.lun = SCAN_WILD_CARD;

1870 scan_data.rescan = SCSI_SCAN_RESCAN;

1871

1872 iscsi_user_scan_session(&session->dev, &scan_data);

1873 atomic_dec(&ihost->nr_scans);

1874 }

1875

1876 /**

1877 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned

1878 * @cmd: scsi cmd passed to scsi eh handler

1879 *

1880 * If the session is down this function will wait for the recovery

1881 * timer to fire or for the session to be logged back in. If the

1882 * recovery timer fires then FAST_IO_FAIL is returned. The caller

1883 * should pass this error value to the scsi eh.

1884 */

1885 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)

1886 {

1887 struct iscsi_cls_session *session =

1888 starget_to_session(scsi_target(cmd->device));

1889 unsigned long flags;

1890 int ret = 0;

1891

1892 spin_lock_irqsave(&session->lock, flags);

1893 while (session->state != ISCSI_SESSION_LOGGED_IN) {

1894 if (session->state == ISCSI_SESSION_FREE) {

1895 ret = FAST_IO_FAIL;

1896 break;

1897 }

1898 spin_unlock_irqrestore(&session->lock, flags);

1899 msleep(1000);

1900 spin_lock_irqsave(&session->lock, flags);

1901 }

1902 spin_unlock_irqrestore(&session->lock, flags);

1903 return ret;

1904 }

1905 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);

1906

1907 static void session_recovery_timedout(struct work_struct *work)

1908 {

1909 struct iscsi_cls_session *session =

1910 container_of(work, struct iscsi_cls_session,

1911 recovery_work.work);

1912 unsigned long flags;

1913

1914 iscsi_cls_session_printk(KERN_INFO, session,

1915 "session recovery timed out after %d secs\n",

1916 session->recovery_tmo);

1917

1918 spin_lock_irqsave(&session->lock, flags);

1919 switch (session->state) {

1920 case ISCSI_SESSION_FAILED:

1921 session->state = ISCSI_SESSION_FREE;

1922 break;

1923 case ISCSI_SESSION_LOGGED_IN:

1924 case ISCSI_SESSION_FREE:

1925 /* we raced with the unblock's flush */

1926 spin_unlock_irqrestore(&session->lock, flags);

1927 return;

1928 }

1929 spin_unlock_irqrestore(&session->lock, flags);

1930

1931 if (session->transport->session_recovery_timedout)

1932 session->transport->session_recovery_timedout(session);

1933

1934 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");

1935 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);

1936 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");

1937 }

1938

1939 static void __iscsi_unblock_session(struct work_struct *work)

1940 {

1941 struct iscsi_cls_session *session =

1942 container_of(work, struct iscsi_cls_session,

1943 unblock_work);

1944 struct Scsi_Host *shost = iscsi_session_to_shost(session);

1945 struct iscsi_cls_host *ihost = shost->shost_data;

1946 unsigned long flags;

1947

1948 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");

1949 /*

1950 * The recovery and unblock work get run from the same workqueue,

1951 * so try to cancel it if it was going to run after this unblock.

1952 */

1953 cancel_delayed_work(&session->recovery_work);

1954 spin_lock_irqsave(&session->lock, flags);

1955 session->state = ISCSI_SESSION_LOGGED_IN;

1956 spin_unlock_irqrestore(&session->lock, flags);

1957 /* start IO */

1958 scsi_target_unblock(&session->dev, SDEV_RUNNING);

1959 /*

1960 * Only do kernel scanning if the driver is properly hooked into

1961 * the async scanning code (drivers like iscsi_tcp do login and

1962 * scanning from userspace).

1963 */

1964 if (shost->hostt->scan_finished) {

1965 if (scsi_queue_work(shost, &session->scan_work))

1966 atomic_inc(&ihost->nr_scans);

1967 }

1968 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");

1969 }

1970

1971 /**

1972 * iscsi_unblock_session - set a session as logged in and start IO.

1973 * @session: iscsi session

1974 *

1975 * Mark a session as ready to accept IO.

1976 */

1977 void iscsi_unblock_session(struct iscsi_cls_session *session)

1978 {

1979 queue_work(iscsi_eh_timer_workq, &session->unblock_work);

1980 /*

1981 * Blocking the session can be done from any context so we only

1982 * queue the block work. Make sure the unblock work has completed

1983 * because it flushes/cancels the other works and updates the state.

1984 */

1985 flush_work(&session->unblock_work);

1986 }

1987 EXPORT_SYMBOL_GPL(iscsi_unblock_session);

1988

1989 static void __iscsi_block_session(struct work_struct *work)

1990 {

1991 struct iscsi_cls_session *session =

1992 container_of(work, struct iscsi_cls_session,

1993 block_work);

1994 unsigned long flags;

1995

1996 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");

1997 spin_lock_irqsave(&session->lock, flags);

1998 session->state = ISCSI_SESSION_FAILED;

1999 spin_unlock_irqrestore(&session->lock, flags);

2000 scsi_target_block(&session->dev);

2001 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");

2002 if (session->recovery_tmo >= 0)

2003 queue_delayed_work(iscsi_eh_timer_workq,

2004 &session->recovery_work,

2005 session->recovery_tmo * HZ);

2006 }

2007

2008 void iscsi_block_session(struct iscsi_cls_session *session)

2009 {

2010 queue_work(iscsi_eh_timer_workq, &session->block_work);

2011 }

2012 EXPORT_SYMBOL_GPL(iscsi_block_session);

2013

2014 static void __iscsi_unbind_session(struct work_struct *work)

2015 {

2016 struct iscsi_cls_session *session =

2017 container_of(work, struct iscsi_cls_session,

2018 unbind_work);

2019 struct Scsi_Host *shost = iscsi_session_to_shost(session);

2020 struct iscsi_cls_host *ihost = shost->shost_data;

2021 unsigned long flags;

2022 unsigned int target_id;

2023

2024 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");

2025

2026 /* Prevent new scans and make sure scanning is not in progress */

2027 mutex_lock(&ihost->mutex);

2028 spin_lock_irqsave(&session->lock, flags);

2029 if (session->target_id == ISCSI_MAX_TARGET) {

2030 spin_unlock_irqrestore(&session->lock, flags);

2031 mutex_unlock(&ihost->mutex);

2032 goto unbind_session_exit;

2033 }

2034

2035 target_id = session->target_id;

2036 session->target_id = ISCSI_MAX_TARGET;

2037 spin_unlock_irqrestore(&session->lock, flags);

2038 mutex_unlock(&ihost->mutex);

2039

2040 scsi_remove_target(&session->dev);

2041

2042 if (session->ida_used)

2043 ida_simple_remove(&iscsi_sess_ida, target_id);

2044

2045 unbind_session_exit:

2046 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);

2047 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");

2048 }

2049

2050 static void __iscsi_destroy_session(struct work_struct *work)

2051 {

2052 struct iscsi_cls_session *session =

2053 container_of(work, struct iscsi_cls_session, destroy_work);

2054

2055 session->transport->destroy_session(session);

2056 }

2057

2058 struct iscsi_cls_session *

2059 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,

2060 int dd_size)

2061 {

2062 struct iscsi_cls_session *session;

2063

2064 session = kzalloc(sizeof(*session) + dd_size,

2065 GFP_KERNEL);

2066 if (!session)

2067 return NULL;

2068

2069 session->transport = transport;

2070 session->creator = -1;

2071 session->recovery_tmo = 120;

2072 session->recovery_tmo_sysfs_override = false;

2073 session->state = ISCSI_SESSION_FREE;

2074 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);

2075 INIT_LIST_HEAD(&session->sess_list);

2076 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);

2077 INIT_WORK(&session->block_work, __iscsi_block_session);

2078 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);

2079 INIT_WORK(&session->scan_work, iscsi_scan_session);

2080 INIT_WORK(&session->destroy_work, __iscsi_destroy_session);

2081 spin_lock_init(&session->lock);

2082

2083 /* this is released in the dev's release function */

2084 scsi_host_get(shost);

2085 session->dev.parent = &shost->shost_gendev;

2086 session->dev.release = iscsi_session_release;

2087 device_initialize(&session->dev);

2088 if (dd_size)

2089 session->dd_data = &session[1];

2090

2091 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");

2092 return session;

2093 }

2094 EXPORT_SYMBOL_GPL(iscsi_alloc_session);

2095

2096 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)

2097 {

2098 unsigned long flags;

2099 int id = 0;

2100 int err;

2101

2102 session->sid = atomic_add_return(1, &iscsi_session_nr);

2103

2104 if (target_id == ISCSI_MAX_TARGET) {

2105 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);

2106

2107 if (id < 0) {

2108 iscsi_cls_session_printk(KERN_ERR, session,

2109 "Failure in Target ID Allocation\n");

2110 return id;

2111 }

2112 session->target_id = (unsigned int)id;

2113 session->ida_used = true;

2114 } else

2115 session->target_id = target_id;

2116

2117 dev_set_name(&session->dev, "session%u", session->sid);

2118 err = device_add(&session->dev);

2119 if (err) {

2120 iscsi_cls_session_printk(KERN_ERR, session,

2121 "could not register session's dev\n");

2122 goto release_ida;

2123 }

2124 err = transport_register_device(&session->dev);

2125 if (err) {

2126 iscsi_cls_session_printk(KERN_ERR, session,

2127 "could not register transport's dev\n");

2128 goto release_dev;

2129 }

2130

2131 spin_lock_irqsave(&sesslock, flags);

2132 list_add(&session->sess_list, &sesslist);

2133 spin_unlock_irqrestore(&sesslock, flags);

2134

2135 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);

2136 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");

2137 return 0;

2138

2139 release_dev:

2140 device_del(&session->dev);

2141 release_ida:

2142 if (session->ida_used)

2143 ida_simple_remove(&iscsi_sess_ida, session->target_id);

2144

2145 return err;

2146 }

2147 EXPORT_SYMBOL_GPL(iscsi_add_session);

2148

2149 /**

2150 * iscsi_create_session - create iscsi class session

2151 * @shost: scsi host

2152 * @transport: iscsi transport

2153 * @dd_size: private driver data size

2154 * @target_id: which target

2155 *

2156 * This can be called from a LLD or iscsi_transport.

2157 */

2158 struct iscsi_cls_session *

2159 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,

2160 int dd_size, unsigned int target_id)

2161 {

2162 struct iscsi_cls_session *session;

2163

2164 session = iscsi_alloc_session(shost, transport, dd_size);

2165 if (!session)

2166 return NULL;

2167

2168 if (iscsi_add_session(session, target_id)) {

2169 iscsi_free_session(session);

2170 return NULL;

2171 }

2172 return session;

2173 }

2174 EXPORT_SYMBOL_GPL(iscsi_create_session);

2175

2176 static void iscsi_conn_release(struct device *dev)

2177 {

2178 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);

2179 struct device *parent = conn->dev.parent;

2180

2181 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");

2182 kfree(conn);

2183 put_device(parent);

2184 }

2185

2186 static int iscsi_is_conn_dev(const struct device *dev)

2187 {

2188 return dev->release == iscsi_conn_release;

2189 }

2190

2191 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)

2192 {

2193 if (!iscsi_is_conn_dev(dev))

2194 return 0;

2195 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));

2196 }

2197

2198 void iscsi_remove_session(struct iscsi_cls_session *session)

2199 {

2200 unsigned long flags;

2201 int err;

2202

2203 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");

2204

2205 spin_lock_irqsave(&sesslock, flags);

2206 if (!list_empty(&session->sess_list))

2207 list_del(&session->sess_list);

2208 spin_unlock_irqrestore(&sesslock, flags);

2209

2210 flush_work(&session->block_work);

2211 flush_work(&session->unblock_work);

2212 cancel_delayed_work_sync(&session->recovery_work);

2213 /*

2214 * If we are blocked let commands flow again. The lld or iscsi

2215 * layer should set up the queuecommand to fail commands.

2216 * We assume that LLD will not be calling block/unblock while

2217 * removing the session.

2218 */

2219 spin_lock_irqsave(&session->lock, flags);

2220 session->state = ISCSI_SESSION_FREE;

2221 spin_unlock_irqrestore(&session->lock, flags);

2222

2223 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);

2224 /* flush running scans then delete devices */

2225 flush_work(&session->scan_work);

2226 /* flush running unbind operations */

2227 flush_work(&session->unbind_work);

2228 __iscsi_unbind_session(&session->unbind_work);

2229

2230 /* hw iscsi may not have removed all connections from session */

2231 err = device_for_each_child(&session->dev, NULL,

2232 iscsi_iter_destroy_conn_fn);

2233 if (err)

2234 iscsi_cls_session_printk(KERN_ERR, session,

2235 "Could not delete all connections "

2236 "for session. Error %d.\n", err);

2237

2238 transport_unregister_device(&session->dev);

2239

2240 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");

2241 device_del(&session->dev);

2242 }

2243 EXPORT_SYMBOL_GPL(iscsi_remove_session);

2244

2245 void iscsi_free_session(struct iscsi_cls_session *session)

2246 {

2247 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");

2248 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);

2249 put_device(&session->dev);

2250 }

2251 EXPORT_SYMBOL_GPL(iscsi_free_session);

2252

2253 /**

2254 * iscsi_create_conn - create iscsi class connection

2255 * @session: iscsi cls session

2256 * @dd_size: private driver data size

2257 * @cid: connection id

2258 *

2259 * This can be called from a LLD or iscsi_transport. The connection

2260 * is child of the session so cid must be unique for all connections

2261 * on the session.

2262 *

2263 * Since we do not support MCS, cid will normally be zero. In some cases

2264 * for software iscsi we could be trying to preallocate a connection struct

2265 * in which case there could be two connection structs and cid would be

2266 * non-zero.

2267 */

2268 struct iscsi_cls_conn *

2269 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)

2270 {

2271 struct iscsi_transport *transport = session->transport;

2272 struct iscsi_cls_conn *conn;

2273 unsigned long flags;

2274 int err;

2275

2276 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);

2277 if (!conn)

2278 return NULL;

2279 if (dd_size)

2280 conn->dd_data = &conn[1];

2281

2282 mutex_init(&conn->ep_mutex);

2283 INIT_LIST_HEAD(&conn->conn_list);

2284 INIT_LIST_HEAD(&conn->conn_list_err);

2285 conn->transport = transport;

2286 conn->cid = cid;

2287 conn->state = ISCSI_CONN_DOWN;

2288

2289 /* this is released in the dev's release function */

2290 if (!get_device(&session->dev))

2291 goto free_conn;

2292

2293 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);

2294 conn->dev.parent = &session->dev;

2295 conn->dev.release = iscsi_conn_release;

2296 err = device_register(&conn->dev);

2297 if (err) {

2298 iscsi_cls_session_printk(KERN_ERR, session, "could not "

2299 "register connection's dev\n");

2300 goto release_parent_ref;

2301 }

2302 err = transport_register_device(&conn->dev);

2303 if (err) {

2304 iscsi_cls_session_printk(KERN_ERR, session, "could not "

2305 "register transport's dev\n");

2306 goto release_conn_ref;

2307 }

2308

2309 spin_lock_irqsave(&connlock, flags);

2310 list_add(&conn->conn_list, &connlist);

2311 spin_unlock_irqrestore(&connlock, flags);

2312

2313 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");

2314 return conn;

2315

2316 release_conn_ref:

2317 device_unregister(&conn->dev);

2318 put_device(&session->dev);

2319 return NULL;

2320 release_parent_ref:

2321 put_device(&session->dev);

2322 free_conn:

2323 kfree(conn);

2324 return NULL;

2325 }

2326

2327 EXPORT_SYMBOL_GPL(iscsi_create_conn);

2328

2329 /**

2330 * iscsi_destroy_conn - destroy iscsi class connection

2331 * @conn: iscsi cls session

2332 *

2333 * This can be called from a LLD or iscsi_transport.

2334 */

2335 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)

2336 {

2337 unsigned long flags;

2338

2339 spin_lock_irqsave(&connlock, flags);

2340 list_del(&conn->conn_list);

2341 list_del(&conn->conn_list_err);

2342 spin_unlock_irqrestore(&connlock, flags);

2343

2344 transport_unregister_device(&conn->dev);

2345 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");

2346 device_unregister(&conn->dev);

2347 return 0;

2348 }

2349 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);

2350

2351 /*

2352 * iscsi interface functions

2353 */

2354 static struct iscsi_internal *

2355 iscsi_if_transport_lookup(struct iscsi_transport *tt)

2356 {

2357 struct iscsi_internal *priv;

2358 unsigned long flags;

2359

2360 spin_lock_irqsave(&iscsi_transport_lock, flags);

2361 list_for_each_entry(priv, &iscsi_transports, list) {

2362 if (tt == priv->iscsi_transport) {

2363 spin_unlock_irqrestore(&iscsi_transport_lock, flags);

2364 return priv;

2365 }

2366 }

2367 spin_unlock_irqrestore(&iscsi_transport_lock, flags);

2368 return NULL;

2369 }

2370

2371 static int

2372 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)

2373 {

2374 return nlmsg_multicast(nls, skb, 0, group, gfp);

2375 }

2376

2377 static int

2378 iscsi_unicast_skb(struct sk_buff *skb, u32 portid)

2379 {

2380 return nlmsg_unicast(nls, skb, portid);

2381 }

2382

2383 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,

2384 char *data, uint32_t data_size)

2385 {

2386 struct nlmsghdr *nlh;

2387 struct sk_buff *skb;

2388 struct iscsi_uevent *ev;

2389 char *pdu;

2390 struct iscsi_internal *priv;

2391 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +

2392 data_size);

2393

2394 priv = iscsi_if_transport_lookup(conn->transport);

2395 if (!priv)

2396 return -EINVAL;

2397

2398 skb = alloc_skb(len, GFP_ATOMIC);

2399 if (!skb) {

2400 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);

2401 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "

2402 "control PDU: OOM\n");

2403 return -ENOMEM;

2404 }

2405

2406 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2407 ev = nlmsg_data(nlh);

2408 memset(ev, 0, sizeof(*ev));

2409 ev->transport_handle = iscsi_handle(conn->transport);

2410 ev->type = ISCSI_KEVENT_RECV_PDU;

2411 ev->r.recv_req.cid = conn->cid;

2412 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);

2413 pdu = (char*)ev + sizeof(*ev);

2414 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));

2415 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);

2416

2417 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);

2418 }

2419 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);

2420

2421 int iscsi_offload_mesg(struct Scsi_Host *shost,

2422 struct iscsi_transport *transport, uint32_t type,

2423 char *data, uint16_t data_size)

2424 {

2425 struct nlmsghdr *nlh;

2426 struct sk_buff *skb;

2427 struct iscsi_uevent *ev;

2428 int len = nlmsg_total_size(sizeof(*ev) + data_size);

2429

2430 skb = alloc_skb(len, GFP_ATOMIC);

2431 if (!skb) {

2432 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");

2433 return -ENOMEM;

2434 }

2435

2436 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2437 ev = nlmsg_data(nlh);

2438 memset(ev, 0, sizeof(*ev));

2439 ev->type = type;

2440 ev->transport_handle = iscsi_handle(transport);

2441 switch (type) {

2442 case ISCSI_KEVENT_PATH_REQ:

2443 ev->r.req_path.host_no = shost->host_no;

2444 break;

2445 case ISCSI_KEVENT_IF_DOWN:

2446 ev->r.notify_if_down.host_no = shost->host_no;

2447 break;

2448 }

2449

2450 memcpy((char *)ev + sizeof(*ev), data, data_size);

2451

2452 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);

2453 }

2454 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);

2455

2456 /*

2457 * This can be called without the rx_queue_mutex, if invoked by the kernel

2458 * stop work. But, in that case, it is guaranteed not to race with

2459 * iscsi_destroy by conn_mutex.

2460 */

2461 static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag)

2462 {

2463 /*

2464 * It is important that this path doesn't rely on

2465 * rx_queue_mutex, otherwise, a thread doing allocation on a

2466 * start_session/start_connection could sleep waiting on a

2467 * writeback to a failed iscsi device, that cannot be recovered

2468 * because the lock is held. If we don't hold it here, the

2469 * kernel stop_conn_work_fn has a chance to stop the broken

2470 * session and resolve the allocation.

2471 *

2472 * Still, the user invoked .stop_conn() needs to be serialized

2473 * with stop_conn_work_fn by a private mutex. Not pretty, but

2474 * it works.

2475 */

2476 mutex_lock(&conn_mutex);

2477 conn->transport->stop_conn(conn, flag);

2478 conn->state = ISCSI_CONN_DOWN;

2479 mutex_unlock(&conn_mutex);

2480

2481 }

2482

2483 static void stop_conn_work_fn(struct work_struct *work)

2484 {

2485 struct iscsi_cls_conn *conn, *tmp;

2486 unsigned long flags;

2487 LIST_HEAD(recovery_list);

2488

2489 spin_lock_irqsave(&connlock, flags);

2490 if (list_empty(&connlist_err)) {

2491 spin_unlock_irqrestore(&connlock, flags);

2492 return;

2493 }

2494 list_splice_init(&connlist_err, &recovery_list);

2495 spin_unlock_irqrestore(&connlock, flags);

2496

2497 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) {

2498 uint32_t sid = iscsi_conn_get_sid(conn);

2499 struct iscsi_cls_session *session;

2500

2501 session = iscsi_session_lookup(sid);

2502 if (session) {

2503 if (system_state != SYSTEM_RUNNING) {

2504 session->recovery_tmo = 0;

2505 iscsi_if_stop_conn(conn, STOP_CONN_TERM);

2506 } else {

2507 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER);

2508 }

2509 }

2510

2511 list_del_init(&conn->conn_list_err);

2512 }

2513 }

2514

2515 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)

2516 {

2517 struct nlmsghdr *nlh;

2518 struct sk_buff *skb;

2519 struct iscsi_uevent *ev;

2520 struct iscsi_internal *priv;

2521 int len = nlmsg_total_size(sizeof(*ev));

2522 unsigned long flags;

2523

2524 spin_lock_irqsave(&connlock, flags);

2525 list_add(&conn->conn_list_err, &connlist_err);

2526 spin_unlock_irqrestore(&connlock, flags);

2527 queue_work(system_unbound_wq, &stop_conn_work);

2528

2529 priv = iscsi_if_transport_lookup(conn->transport);

2530 if (!priv)

2531 return;

2532

2533 skb = alloc_skb(len, GFP_ATOMIC);

2534 if (!skb) {

2535 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "

2536 "conn error (%d)\n", error);

2537 return;

2538 }

2539

2540 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2541 ev = nlmsg_data(nlh);

2542 ev->transport_handle = iscsi_handle(conn->transport);

2543 ev->type = ISCSI_KEVENT_CONN_ERROR;

2544 ev->r.connerror.error = error;

2545 ev->r.connerror.cid = conn->cid;

2546 ev->r.connerror.sid = iscsi_conn_get_sid(conn);

2547

2548 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);

2549

2550 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",

2551 error);

2552 }

2553 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);

2554

2555 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,

2556 enum iscsi_conn_state state)

2557 {

2558 struct nlmsghdr *nlh;

2559 struct sk_buff *skb;

2560 struct iscsi_uevent *ev;

2561 struct iscsi_internal *priv;

2562 int len = nlmsg_total_size(sizeof(*ev));

2563

2564 priv = iscsi_if_transport_lookup(conn->transport);

2565 if (!priv)

2566 return;

2567

2568 skb = alloc_skb(len, GFP_ATOMIC);

2569 if (!skb) {

2570 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "

2571 "conn login (%d)\n", state);

2572 return;

2573 }

2574

2575 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2576 ev = nlmsg_data(nlh);

2577 ev->transport_handle = iscsi_handle(conn->transport);

2578 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;

2579 ev->r.conn_login.state = state;

2580 ev->r.conn_login.cid = conn->cid;

2581 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);

2582 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);

2583

2584 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",

2585 state);

2586 }

2587 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);

2588

2589 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,

2590 enum iscsi_host_event_code code, uint32_t data_size,

2591 uint8_t *data)

2592 {

2593 struct nlmsghdr *nlh;

2594 struct sk_buff *skb;

2595 struct iscsi_uevent *ev;

2596 int len = nlmsg_total_size(sizeof(*ev) + data_size);

2597

2598 skb = alloc_skb(len, GFP_NOIO);

2599 if (!skb) {

2600 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",

2601 host_no, code);

2602 return;

2603 }

2604

2605 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2606 ev = nlmsg_data(nlh);

2607 ev->transport_handle = iscsi_handle(transport);

2608 ev->type = ISCSI_KEVENT_HOST_EVENT;

2609 ev->r.host_event.host_no = host_no;

2610 ev->r.host_event.code = code;

2611 ev->r.host_event.data_size = data_size;

2612

2613 if (data_size)

2614 memcpy((char *)ev + sizeof(*ev), data, data_size);

2615

2616 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);

2617 }

2618 EXPORT_SYMBOL_GPL(iscsi_post_host_event);

2619

2620 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,

2621 uint32_t status, uint32_t pid, uint32_t data_size,

2622 uint8_t *data)

2623 {

2624 struct nlmsghdr *nlh;

2625 struct sk_buff *skb;

2626 struct iscsi_uevent *ev;

2627 int len = nlmsg_total_size(sizeof(*ev) + data_size);

2628

2629 skb = alloc_skb(len, GFP_NOIO);

2630 if (!skb) {

2631 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");

2632 return;

2633 }

2634

2635 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2636 ev = nlmsg_data(nlh);

2637 ev->transport_handle = iscsi_handle(transport);

2638 ev->type = ISCSI_KEVENT_PING_COMP;

2639 ev->r.ping_comp.host_no = host_no;

2640 ev->r.ping_comp.status = status;

2641 ev->r.ping_comp.pid = pid;

2642 ev->r.ping_comp.data_size = data_size;

2643 memcpy((char *)ev + sizeof(*ev), data, data_size);

2644

2645 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);

2646 }

2647 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);

2648

2649 static int

2650 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)

2651 {

2652 struct sk_buff *skb;

2653 struct nlmsghdr *nlh;

2654 int len = nlmsg_total_size(size);

2655

2656 skb = alloc_skb(len, GFP_ATOMIC);

2657 if (!skb) {

2658 printk(KERN_ERR "Could not allocate skb to send reply.\n");

2659 return -ENOMEM;

2660 }

2661

2662 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);

2663 memcpy(nlmsg_data(nlh), payload, size);

2664 return iscsi_unicast_skb(skb, portid);

2665 }

2666

2667 static int

2668 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)

2669 {

2670 struct iscsi_uevent *ev = nlmsg_data(nlh);

2671 struct iscsi_stats *stats;

2672 struct sk_buff *skbstat;

2673 struct iscsi_cls_conn *conn;

2674 struct nlmsghdr *nlhstat;

2675 struct iscsi_uevent *evstat;

2676 struct iscsi_internal *priv;

2677 int len = nlmsg_total_size(sizeof(*ev) +

2678 sizeof(struct iscsi_stats) +

2679 sizeof(struct iscsi_stats_custom) *

2680 ISCSI_STATS_CUSTOM_MAX);

2681 int err = 0;

2682

2683 priv = iscsi_if_transport_lookup(transport);

2684 if (!priv)

2685 return -EINVAL;

2686

2687 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);

2688 if (!conn)

2689 return -EEXIST;

2690

2691 do {

2692 int actual_size;

2693

2694 skbstat = alloc_skb(len, GFP_ATOMIC);

2695 if (!skbstat) {

2696 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "

2697 "deliver stats: OOM\n");

2698 return -ENOMEM;

2699 }

2700

2701 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,

2702 (len - sizeof(*nlhstat)), 0);

2703 evstat = nlmsg_data(nlhstat);

2704 memset(evstat, 0, sizeof(*evstat));

2705 evstat->transport_handle = iscsi_handle(conn->transport);

2706 evstat->type = nlh->nlmsg_type;

2707 evstat->u.get_stats.cid =

2708 ev->u.get_stats.cid;

2709 evstat->u.get_stats.sid =

2710 ev->u.get_stats.sid;

2711 stats = (struct iscsi_stats *)

2712 ((char*)evstat + sizeof(*evstat));

2713 memset(stats, 0, sizeof(*stats));

2714

2715 transport->get_stats(conn, stats);

2716 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +

2717 sizeof(struct iscsi_stats) +

2718 sizeof(struct iscsi_stats_custom) *

2719 stats->custom_length);

2720 actual_size -= sizeof(*nlhstat);

2721 actual_size = nlmsg_msg_size(actual_size);

2722 skb_trim(skbstat, NLMSG_ALIGN(actual_size));

2723 nlhstat->nlmsg_len = actual_size;

2724

2725 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,

2726 GFP_ATOMIC);

2727 } while (err < 0 && err != -ECONNREFUSED);

2728

2729 return err;

2730 }

2731

2732 /**

2733 * iscsi_session_event - send session destr. completion event

2734 * @session: iscsi class session

2735 * @event: type of event

2736 */

2737 int iscsi_session_event(struct iscsi_cls_session *session,

2738 enum iscsi_uevent_e event)

2739 {

2740 struct iscsi_internal *priv;

2741 struct Scsi_Host *shost;

2742 struct iscsi_uevent *ev;

2743 struct sk_buff *skb;

2744 struct nlmsghdr *nlh;

2745 int rc, len = nlmsg_total_size(sizeof(*ev));

2746

2747 priv = iscsi_if_transport_lookup(session->transport);

2748 if (!priv)

2749 return -EINVAL;

2750 shost = iscsi_session_to_shost(session);

2751

2752 skb = alloc_skb(len, GFP_KERNEL);

2753 if (!skb) {

2754 iscsi_cls_session_printk(KERN_ERR, session,

2755 "Cannot notify userspace of session "

2756 "event %u\n", event);

2757 return -ENOMEM;

2758 }

2759

2760 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2761 ev = nlmsg_data(nlh);

2762 ev->transport_handle = iscsi_handle(session->transport);

2763

2764 ev->type = event;

2765 switch (event) {

2766 case ISCSI_KEVENT_DESTROY_SESSION:

2767 ev->r.d_session.host_no = shost->host_no;

2768 ev->r.d_session.sid = session->sid;

2769 break;

2770 case ISCSI_KEVENT_CREATE_SESSION:

2771 ev->r.c_session_ret.host_no = shost->host_no;

2772 ev->r.c_session_ret.sid = session->sid;

2773 break;

2774 case ISCSI_KEVENT_UNBIND_SESSION:

2775 ev->r.unbind_session.host_no = shost->host_no;

2776 ev->r.unbind_session.sid = session->sid;

2777 break;

2778 default:

2779 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "

2780 "%u.\n", event);

2781 kfree_skb(skb);

2782 return -EINVAL;

2783 }

2784

2785 /*

2786 * this will occur if the daemon is not up, so we just warn

2787 * the user and when the daemon is restarted it will handle it

2788 */

2789 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);

2790 if (rc == -ESRCH)

2791 iscsi_cls_session_printk(KERN_ERR, session,

2792 "Cannot notify userspace of session "

2793 "event %u. Check iscsi daemon\n",

2794 event);

2795

2796 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",

2797 event, rc);

2798 return rc;

2799 }

2800 EXPORT_SYMBOL_GPL(iscsi_session_event);

2801

2802 static int

2803 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,

2804 struct iscsi_uevent *ev, pid_t pid,

2805 uint32_t initial_cmdsn, uint16_t cmds_max,

2806 uint16_t queue_depth)

2807 {

2808 struct iscsi_transport *transport = priv->iscsi_transport;

2809 struct iscsi_cls_session *session;

2810 struct Scsi_Host *shost;

2811

2812 session = transport->create_session(ep, cmds_max, queue_depth,

2813 initial_cmdsn);

2814 if (!session)

2815 return -ENOMEM;

2816

2817 session->creator = pid;

2818 shost = iscsi_session_to_shost(session);

2819 ev->r.c_session_ret.host_no = shost->host_no;

2820 ev->r.c_session_ret.sid = session->sid;

2821 ISCSI_DBG_TRANS_SESSION(session,

2822 "Completed creating transport session\n");

2823 return 0;

2824 }

2825

2826 static int

2827 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)

2828 {

2829 struct iscsi_cls_conn *conn;

2830 struct iscsi_cls_session *session;

2831

2832 session = iscsi_session_lookup(ev->u.c_conn.sid);

2833 if (!session) {

2834 printk(KERN_ERR "iscsi: invalid session %d.\n",

2835 ev->u.c_conn.sid);

2836 return -EINVAL;

2837 }

2838

2839 conn = transport->create_conn(session, ev->u.c_conn.cid);

2840 if (!conn) {

2841 iscsi_cls_session_printk(KERN_ERR, session,

2842 "couldn't create a new connection.");

2843 return -ENOMEM;

2844 }

2845

2846 ev->r.c_conn_ret.sid = session->sid;

2847 ev->r.c_conn_ret.cid = conn->cid;

2848

2849 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");

2850 return 0;

2851 }

2852

2853 static int

2854 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)

2855 {

2856 struct iscsi_cls_conn *conn;

2857 unsigned long flags;

2858

2859 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);

2860 if (!conn)

2861 return -EINVAL;

2862

2863 spin_lock_irqsave(&connlock, flags);

2864 if (!list_empty(&conn->conn_list_err)) {

2865 spin_unlock_irqrestore(&connlock, flags);

2866 return -EAGAIN;

2867 }

2868 spin_unlock_irqrestore(&connlock, flags);

2869

2870 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");

2871

2872 mutex_lock(&conn_mutex);

2873 if (transport->destroy_conn)

2874 transport->destroy_conn(conn);

2875 mutex_unlock(&conn_mutex);

2876

2877 return 0;

2878 }

2879

2880 static int

2881 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)

2882 {

2883 char *data = (char*)ev + sizeof(*ev);

2884 struct iscsi_cls_conn *conn;

2885 struct iscsi_cls_session *session;

2886 int err = 0, value = 0;

2887

2888 if (ev->u.set_param.len > PAGE_SIZE)

2889 return -EINVAL;

2890

2891 session = iscsi_session_lookup(ev->u.set_param.sid);

2892 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);

2893 if (!conn || !session)

2894 return -EINVAL;

2895

2896 switch (ev->u.set_param.param) {

2897 case ISCSI_PARAM_SESS_RECOVERY_TMO:

2898 sscanf(data, "%d", &value);

2899 if (!session->recovery_tmo_sysfs_override)

2900 session->recovery_tmo = value;

2901 break;

2902 default:

2903 err = transport->set_param(conn, ev->u.set_param.param,

2904 data, ev->u.set_param.len);

2905 if ((conn->state == ISCSI_CONN_BOUND) ||

2906 (conn->state == ISCSI_CONN_UP)) {

2907 err = transport->set_param(conn, ev->u.set_param.param,

2908 data, ev->u.set_param.len);

2909 } else {

2910 return -ENOTCONN;

2911 }

2912 }

2913

2914 return err;

2915 }

2916

2917 static int iscsi_if_ep_connect(struct iscsi_transport *transport,

2918 struct iscsi_uevent *ev, int msg_type)

2919 {

2920 struct iscsi_endpoint *ep;

2921 struct sockaddr *dst_addr;

2922 struct Scsi_Host *shost = NULL;

2923 int non_blocking, err = 0;

2924

2925 if (!transport->ep_connect)

2926 return -EINVAL;

2927

2928 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {

2929 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);

2930 if (!shost) {

2931 printk(KERN_ERR "ep connect failed. Could not find "

2932 "host no %u\n",

2933 ev->u.ep_connect_through_host.host_no);

2934 return -ENODEV;

2935 }

2936 non_blocking = ev->u.ep_connect_through_host.non_blocking;

2937 } else

2938 non_blocking = ev->u.ep_connect.non_blocking;

2939

2940 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));

2941 ep = transport->ep_connect(shost, dst_addr, non_blocking);

2942 if (IS_ERR(ep)) {

2943 err = PTR_ERR(ep);

2944 goto release_host;

2945 }

2946

2947 ev->r.ep_connect_ret.handle = ep->id;

2948 release_host:

2949 if (shost)

2950 scsi_host_put(shost);

2951 return err;

2952 }

2953

2954 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,

2955 u64 ep_handle)

2956 {

2957 struct iscsi_cls_conn *conn;

2958 struct iscsi_endpoint *ep;

2959

2960 if (!transport->ep_disconnect)

2961 return -EINVAL;

2962

2963 ep = iscsi_lookup_endpoint(ep_handle);

2964 if (!ep)

2965 return -EINVAL;

2966 conn = ep->conn;

2967 if (conn) {

2968 mutex_lock(&conn->ep_mutex);

2969 conn->ep = NULL;

2970 mutex_unlock(&conn->ep_mutex);

2971 conn->state = ISCSI_CONN_DOWN;

2972 }

2973

2974 transport->ep_disconnect(ep);

2975 return 0;

2976 }

2977

2978 static int

2979 iscsi_if_transport_ep(struct iscsi_transport *transport,

2980 struct iscsi_uevent *ev, int msg_type)

2981 {

2982 struct iscsi_endpoint *ep;

2983 int rc = 0;

2984

2985 switch (msg_type) {

2986 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:

2987 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:

2988 rc = iscsi_if_ep_connect(transport, ev, msg_type);

2989 break;

2990 case ISCSI_UEVENT_TRANSPORT_EP_POLL:

2991 if (!transport->ep_poll)

2992 return -EINVAL;

2993

2994 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);

2995 if (!ep)

2996 return -EINVAL;

2997

2998 ev->r.retcode = transport->ep_poll(ep,

2999 ev->u.ep_poll.timeout_ms);

3000 break;

3001 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:

3002 rc = iscsi_if_ep_disconnect(transport,

3003 ev->u.ep_disconnect.ep_handle);

3004 break;

3005 }

3006 return rc;

3007 }

3008

3009 static int

3010 iscsi_tgt_dscvr(struct iscsi_transport *transport,

3011 struct iscsi_uevent *ev)

3012 {

3013 struct Scsi_Host *shost;

3014 struct sockaddr *dst_addr;

3015 int err;

3016

3017 if (!transport->tgt_dscvr)

3018 return -EINVAL;

3019

3020 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);

3021 if (!shost) {

3022 printk(KERN_ERR "target discovery could not find host no %u\n",

3023 ev->u.tgt_dscvr.host_no);

3024 return -ENODEV;

3025 }

3026

3027

3028 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));

3029 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,

3030 ev->u.tgt_dscvr.enable, dst_addr);

3031 scsi_host_put(shost);

3032 return err;

3033 }

3034

3035 static int

3036 iscsi_set_host_param(struct iscsi_transport *transport,

3037 struct iscsi_uevent *ev)

3038 {

3039 char *data = (char*)ev + sizeof(*ev);

3040 struct Scsi_Host *shost;

3041 int err;

3042

3043 if (!transport->set_host_param)

3044 return -ENOSYS;

3045

3046 if (ev->u.set_host_param.len > PAGE_SIZE)

3047 return -EINVAL;

3048

3049 shost = scsi_host_lookup(ev->u.set_host_param.host_no);

3050 if (!shost) {

3051 printk(KERN_ERR "set_host_param could not find host no %u\n",

3052 ev->u.set_host_param.host_no);

3053 return -ENODEV;

3054 }

3055

3056 err = transport->set_host_param(shost, ev->u.set_host_param.param,

3057 data, ev->u.set_host_param.len);

3058 scsi_host_put(shost);

3059 return err;

3060 }

3061

3062 static int

3063 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)

3064 {

3065 struct Scsi_Host *shost;

3066 struct iscsi_path *params;

3067 int err;

3068

3069 if (!transport->set_path)

3070 return -ENOSYS;

3071

3072 shost = scsi_host_lookup(ev->u.set_path.host_no);

3073 if (!shost) {

3074 printk(KERN_ERR "set path could not find host no %u\n",

3075 ev->u.set_path.host_no);

3076 return -ENODEV;

3077 }

3078

3079 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));

3080 err = transport->set_path(shost, params);

3081

3082 scsi_host_put(shost);

3083 return err;

3084 }

3085

3086 static int iscsi_session_has_conns(int sid)

3087 {

3088 struct iscsi_cls_conn *conn;

3089 unsigned long flags;

3090 int found = 0;

3091

3092 spin_lock_irqsave(&connlock, flags);

3093 list_for_each_entry(conn, &connlist, conn_list) {

3094 if (iscsi_conn_get_sid(conn) == sid) {

3095 found = 1;

3096 break;

3097 }

3098 }

3099 spin_unlock_irqrestore(&connlock, flags);

3100

3101 return found;

3102 }

3103

3104 static int

3105 iscsi_set_iface_params(struct iscsi_transport *transport,

3106 struct iscsi_uevent *ev, uint32_t len)

3107 {

3108 char *data = (char *)ev + sizeof(*ev);

3109 struct Scsi_Host *shost;

3110 int err;

3111

3112 if (!transport->set_iface_param)

3113 return -ENOSYS;

3114

3115 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);

3116 if (!shost) {

3117 printk(KERN_ERR "set_iface_params could not find host no %u\n",

3118 ev->u.set_iface_params.host_no);

3119 return -ENODEV;

3120 }

3121

3122 err = transport->set_iface_param(shost, data, len);

3123 scsi_host_put(shost);

3124 return err;

3125 }

3126

3127 static int

3128 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)

3129 {

3130 struct Scsi_Host *shost;

3131 struct sockaddr *dst_addr;

3132 int err;

3133

3134 if (!transport->send_ping)

3135 return -ENOSYS;

3136

3137 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);

3138 if (!shost) {

3139 printk(KERN_ERR "iscsi_ping could not find host no %u\n",

3140 ev->u.iscsi_ping.host_no);

3141 return -ENODEV;

3142 }

3143

3144 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));

3145 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,

3146 ev->u.iscsi_ping.iface_type,

3147 ev->u.iscsi_ping.payload_size,

3148 ev->u.iscsi_ping.pid,

3149 dst_addr);

3150 scsi_host_put(shost);

3151 return err;

3152 }

3153

3154 static int

3155 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)

3156 {

3157 struct iscsi_uevent *ev = nlmsg_data(nlh);

3158 struct Scsi_Host *shost = NULL;

3159 struct iscsi_chap_rec *chap_rec;

3160 struct iscsi_internal *priv;

3161 struct sk_buff *skbchap;

3162 struct nlmsghdr *nlhchap;

3163 struct iscsi_uevent *evchap;

3164 uint32_t chap_buf_size;

3165 int len, err = 0;

3166 char *buf;

3167

3168 if (!transport->get_chap)

3169 return -EINVAL;

3170

3171 priv = iscsi_if_transport_lookup(transport);

3172 if (!priv)

3173 return -EINVAL;

3174

3175 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));

3176 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);

3177

3178 shost = scsi_host_lookup(ev->u.get_chap.host_no);

3179 if (!shost) {

3180 printk(KERN_ERR "%s: failed. Could not find host no %u\n",

3181 __func__, ev->u.get_chap.host_no);

3182 return -ENODEV;

3183 }

3184

3185 do {

3186 int actual_size;

3187

3188 skbchap = alloc_skb(len, GFP_KERNEL);

3189 if (!skbchap) {

3190 printk(KERN_ERR "can not deliver chap: OOM\n");

3191 err = -ENOMEM;

3192 goto exit_get_chap;

3193 }

3194

3195 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,

3196 (len - sizeof(*nlhchap)), 0);

3197 evchap = nlmsg_data(nlhchap);

3198 memset(evchap, 0, sizeof(*evchap));

3199 evchap->transport_handle = iscsi_handle(transport);

3200 evchap->type = nlh->nlmsg_type;

3201 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;

3202 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;

3203 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;

3204 buf = (char *)evchap + sizeof(*evchap);

3205 memset(buf, 0, chap_buf_size);

3206

3207 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,

3208 &evchap->u.get_chap.num_entries, buf);

3209

3210 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);

3211 skb_trim(skbchap, NLMSG_ALIGN(actual_size));

3212 nlhchap->nlmsg_len = actual_size;

3213

3214 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,

3215 GFP_KERNEL);

3216 } while (err < 0 && err != -ECONNREFUSED);

3217

3218 exit_get_chap:

3219 scsi_host_put(shost);

3220 return err;

3221 }

3222

3223 static int iscsi_set_chap(struct iscsi_transport *transport,

3224 struct iscsi_uevent *ev, uint32_t len)

3225 {

3226 char *data = (char *)ev + sizeof(*ev);

3227 struct Scsi_Host *shost;

3228 int err = 0;

3229

3230 if (!transport->set_chap)

3231 return -ENOSYS;

3232

3233 shost = scsi_host_lookup(ev->u.set_path.host_no);

3234 if (!shost) {

3235 pr_err("%s could not find host no %u\n",

3236 __func__, ev->u.set_path.host_no);

3237 return -ENODEV;

3238 }

3239

3240 err = transport->set_chap(shost, data, len);

3241 scsi_host_put(shost);

3242 return err;

3243 }

3244

3245 static int iscsi_delete_chap(struct iscsi_transport *transport,

3246 struct iscsi_uevent *ev)

3247 {

3248 struct Scsi_Host *shost;

3249 int err = 0;

3250

3251 if (!transport->delete_chap)

3252 return -ENOSYS;

3253

3254 shost = scsi_host_lookup(ev->u.delete_chap.host_no);

3255 if (!shost) {

3256 printk(KERN_ERR "%s could not find host no %u\n",

3257 __func__, ev->u.delete_chap.host_no);

3258 return -ENODEV;

3259 }

3260

3261 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);

3262 scsi_host_put(shost);

3263 return err;

3264 }

3265

3266 static const struct {

3267 enum iscsi_discovery_parent_type value;

3268 char *name;

3269 } iscsi_discovery_parent_names[] = {

3270 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },

3271 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },

3272 {ISCSI_DISC_PARENT_ISNS, "isns" },

3273 };

3274

3275 char *iscsi_get_discovery_parent_name(int parent_type)

3276 {

3277 int i;

3278 char *state = "Unknown!";

3279

3280 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {

3281 if (iscsi_discovery_parent_names[i].value & parent_type) {

3282 state = iscsi_discovery_parent_names[i].name;

3283 break;

3284 }

3285 }

3286 return state;

3287 }

3288 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);

3289

3290 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,

3291 struct iscsi_uevent *ev, uint32_t len)

3292 {

3293 char *data = (char *)ev + sizeof(*ev);

3294 struct Scsi_Host *shost;

3295 struct iscsi_bus_flash_session *fnode_sess;

3296 struct iscsi_bus_flash_conn *fnode_conn;

3297 struct device *dev;

3298 uint32_t idx;

3299 int err = 0;

3300

3301 if (!transport->set_flashnode_param) {

3302 err = -ENOSYS;

3303 goto exit_set_fnode;

3304 }

3305

3306 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);

3307 if (!shost) {

3308 pr_err("%s could not find host no %u\n",

3309 __func__, ev->u.set_flashnode.host_no);

3310 err = -ENODEV;

3311 goto exit_set_fnode;

3312 }

3313

3314 idx = ev->u.set_flashnode.flashnode_idx;

3315 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);

3316 if (!fnode_sess) {

3317 pr_err("%s could not find flashnode %u for host no %u\n",

3318 __func__, idx, ev->u.set_flashnode.host_no);

3319 err = -ENODEV;

3320 goto put_host;

3321 }

3322

3323 dev = iscsi_find_flashnode_conn(fnode_sess);

3324 if (!dev) {

3325 err = -ENODEV;

3326 goto put_sess;

3327 }

3328

3329 fnode_conn = iscsi_dev_to_flash_conn(dev);

3330 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);

3331 put_device(dev);

3332

3333 put_sess:

3334 put_device(&fnode_sess->dev);

3335

3336 put_host:

3337 scsi_host_put(shost);

3338

3339 exit_set_fnode:

3340 return err;

3341 }

3342

3343 static int iscsi_new_flashnode(struct iscsi_transport *transport,

3344 struct iscsi_uevent *ev, uint32_t len)

3345 {

3346 char *data = (char *)ev + sizeof(*ev);

3347 struct Scsi_Host *shost;

3348 int index;

3349 int err = 0;

3350

3351 if (!transport->new_flashnode) {

3352 err = -ENOSYS;

3353 goto exit_new_fnode;

3354 }

3355

3356 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);

3357 if (!shost) {

3358 pr_err("%s could not find host no %u\n",

3359 __func__, ev->u.new_flashnode.host_no);

3360 err = -ENODEV;

3361 goto put_host;

3362 }

3363

3364 index = transport->new_flashnode(shost, data, len);

3365

3366 if (index >= 0)

3367 ev->r.new_flashnode_ret.flashnode_idx = index;

3368 else

3369 err = -EIO;

3370

3371 put_host:

3372 scsi_host_put(shost);

3373

3374 exit_new_fnode:

3375 return err;

3376 }

3377

3378 static int iscsi_del_flashnode(struct iscsi_transport *transport,

3379 struct iscsi_uevent *ev)

3380 {

3381 struct Scsi_Host *shost;

3382 struct iscsi_bus_flash_session *fnode_sess;

3383 uint32_t idx;

3384 int err = 0;

3385

3386 if (!transport->del_flashnode) {

3387 err = -ENOSYS;

3388 goto exit_del_fnode;

3389 }

3390

3391 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);

3392 if (!shost) {

3393 pr_err("%s could not find host no %u\n",

3394 __func__, ev->u.del_flashnode.host_no);

3395 err = -ENODEV;

3396 goto put_host;

3397 }

3398

3399 idx = ev->u.del_flashnode.flashnode_idx;

3400 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);

3401 if (!fnode_sess) {

3402 pr_err("%s could not find flashnode %u for host no %u\n",

3403 __func__, idx, ev->u.del_flashnode.host_no);

3404 err = -ENODEV;

3405 goto put_host;

3406 }

3407

3408 err = transport->del_flashnode(fnode_sess);

3409 put_device(&fnode_sess->dev);

3410

3411 put_host:

3412 scsi_host_put(shost);

3413

3414 exit_del_fnode:

3415 return err;

3416 }

3417

3418 static int iscsi_login_flashnode(struct iscsi_transport *transport,

3419 struct iscsi_uevent *ev)

3420 {

3421 struct Scsi_Host *shost;

3422 struct iscsi_bus_flash_session *fnode_sess;

3423 struct iscsi_bus_flash_conn *fnode_conn;

3424 struct device *dev;

3425 uint32_t idx;

3426 int err = 0;

3427

3428 if (!transport->login_flashnode) {

3429 err = -ENOSYS;

3430 goto exit_login_fnode;

3431 }

3432

3433 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);

3434 if (!shost) {

3435 pr_err("%s could not find host no %u\n",

3436 __func__, ev->u.login_flashnode.host_no);

3437 err = -ENODEV;

3438 goto put_host;

3439 }

3440

3441 idx = ev->u.login_flashnode.flashnode_idx;

3442 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);

3443 if (!fnode_sess) {

3444 pr_err("%s could not find flashnode %u for host no %u\n",

3445 __func__, idx, ev->u.login_flashnode.host_no);

3446 err = -ENODEV;

3447 goto put_host;

3448 }

3449

3450 dev = iscsi_find_flashnode_conn(fnode_sess);

3451 if (!dev) {

3452 err = -ENODEV;

3453 goto put_sess;

3454 }

3455

3456 fnode_conn = iscsi_dev_to_flash_conn(dev);

3457 err = transport->login_flashnode(fnode_sess, fnode_conn);

3458 put_device(dev);

3459

3460 put_sess:

3461 put_device(&fnode_sess->dev);

3462

3463 put_host:

3464 scsi_host_put(shost);

3465

3466 exit_login_fnode:

3467 return err;

3468 }

3469

3470 static int iscsi_logout_flashnode(struct iscsi_transport *transport,

3471 struct iscsi_uevent *ev)

3472 {

3473 struct Scsi_Host *shost;

3474 struct iscsi_bus_flash_session *fnode_sess;

3475 struct iscsi_bus_flash_conn *fnode_conn;

3476 struct device *dev;

3477 uint32_t idx;

3478 int err = 0;

3479

3480 if (!transport->logout_flashnode) {

3481 err = -ENOSYS;

3482 goto exit_logout_fnode;

3483 }

3484

3485 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);

3486 if (!shost) {

3487 pr_err("%s could not find host no %u\n",

3488 __func__, ev->u.logout_flashnode.host_no);

3489 err = -ENODEV;

3490 goto put_host;

3491 }

3492

3493 idx = ev->u.logout_flashnode.flashnode_idx;

3494 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);

3495 if (!fnode_sess) {

3496 pr_err("%s could not find flashnode %u for host no %u\n",

3497 __func__, idx, ev->u.logout_flashnode.host_no);

3498 err = -ENODEV;

3499 goto put_host;

3500 }

3501

3502 dev = iscsi_find_flashnode_conn(fnode_sess);

3503 if (!dev) {

3504 err = -ENODEV;

3505 goto put_sess;

3506 }

3507

3508 fnode_conn = iscsi_dev_to_flash_conn(dev);

3509

3510 err = transport->logout_flashnode(fnode_sess, fnode_conn);

3511 put_device(dev);

3512

3513 put_sess:

3514 put_device(&fnode_sess->dev);

3515

3516 put_host:

3517 scsi_host_put(shost);

3518

3519 exit_logout_fnode:

3520 return err;

3521 }

3522

3523 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,

3524 struct iscsi_uevent *ev)

3525 {

3526 struct Scsi_Host *shost;

3527 struct iscsi_cls_session *session;

3528 int err = 0;

3529

3530 if (!transport->logout_flashnode_sid) {

3531 err = -ENOSYS;

3532 goto exit_logout_sid;

3533 }

3534

3535 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);

3536 if (!shost) {

3537 pr_err("%s could not find host no %u\n",

3538 __func__, ev->u.logout_flashnode.host_no);

3539 err = -ENODEV;

3540 goto put_host;

3541 }

3542

3543 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);

3544 if (!session) {

3545 pr_err("%s could not find session id %u\n",

3546 __func__, ev->u.logout_flashnode_sid.sid);

3547 err = -EINVAL;

3548 goto put_host;

3549 }

3550

3551 err = transport->logout_flashnode_sid(session);

3552

3553 put_host:

3554 scsi_host_put(shost);

3555

3556 exit_logout_sid:

3557 return err;

3558 }

3559

3560 static int

3561 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)

3562 {

3563 struct iscsi_uevent *ev = nlmsg_data(nlh);

3564 struct Scsi_Host *shost = NULL;

3565 struct iscsi_internal *priv;

3566 struct sk_buff *skbhost_stats;

3567 struct nlmsghdr *nlhhost_stats;

3568 struct iscsi_uevent *evhost_stats;

3569 int host_stats_size = 0;

3570 int len, err = 0;

3571 char *buf;

3572

3573 if (!transport->get_host_stats)

3574 return -ENOSYS;

3575

3576 priv = iscsi_if_transport_lookup(transport);

3577 if (!priv)

3578 return -EINVAL;

3579

3580 host_stats_size = sizeof(struct iscsi_offload_host_stats);

3581 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);

3582

3583 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);

3584 if (!shost) {

3585 pr_err("%s: failed. Could not find host no %u\n",

3586 __func__, ev->u.get_host_stats.host_no);

3587 return -ENODEV;

3588 }

3589

3590 do {

3591 int actual_size;

3592

3593 skbhost_stats = alloc_skb(len, GFP_KERNEL);

3594 if (!skbhost_stats) {

3595 pr_err("cannot deliver host stats: OOM\n");

3596 err = -ENOMEM;

3597 goto exit_host_stats;

3598 }

3599

3600 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,

3601 (len - sizeof(*nlhhost_stats)), 0);

3602 evhost_stats = nlmsg_data(nlhhost_stats);

3603 memset(evhost_stats, 0, sizeof(*evhost_stats));

3604 evhost_stats->transport_handle = iscsi_handle(transport);

3605 evhost_stats->type = nlh->nlmsg_type;

3606 evhost_stats->u.get_host_stats.host_no =

3607 ev->u.get_host_stats.host_no;

3608 buf = (char *)evhost_stats + sizeof(*evhost_stats);

3609 memset(buf, 0, host_stats_size);

3610

3611 err = transport->get_host_stats(shost, buf, host_stats_size);

3612 if (err) {

3613 kfree_skb(skbhost_stats);

3614 goto exit_host_stats;

3615 }

3616

3617 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);

3618 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));

3619 nlhhost_stats->nlmsg_len = actual_size;

3620

3621 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,

3622 GFP_KERNEL);

3623 } while (err < 0 && err != -ECONNREFUSED);

3624

3625 exit_host_stats:

3626 scsi_host_put(shost);

3627 return err;

3628 }

3629

3630

3631 static int

3632 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)

3633 {

3634 int err = 0;

3635 u32 portid;

3636 u32 pdu_len;

3637 struct iscsi_uevent *ev = nlmsg_data(nlh);

3638 struct iscsi_transport *transport = NULL;

3639 struct iscsi_internal *priv;

3640 struct iscsi_cls_session *session;

3641 struct iscsi_cls_conn *conn;

3642 struct iscsi_endpoint *ep = NULL;

3643

3644 if (!netlink_capable(skb, CAP_SYS_ADMIN))

3645 return -EPERM;

3646

3647 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)

3648 *group = ISCSI_NL_GRP_UIP;

3649 else

3650 *group = ISCSI_NL_GRP_ISCSID;

3651

3652 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));

3653 if (!priv)

3654 return -EINVAL;

3655 transport = priv->iscsi_transport;

3656

3657 if (!try_module_get(transport->owner))

3658 return -EINVAL;

3659

3660 portid = NETLINK_CB(skb).portid;

3661

3662 switch (nlh->nlmsg_type) {

3663 case ISCSI_UEVENT_CREATE_SESSION:

3664 err = iscsi_if_create_session(priv, ep, ev,

3665 portid,

3666 ev->u.c_session.initial_cmdsn,

3667 ev->u.c_session.cmds_max,

3668 ev->u.c_session.queue_depth);

3669 break;

3670 case ISCSI_UEVENT_CREATE_BOUND_SESSION:

3671 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);

3672 if (!ep) {

3673 err = -EINVAL;

3674 break;

3675 }

3676

3677 err = iscsi_if_create_session(priv, ep, ev,

3678 portid,

3679 ev->u.c_bound_session.initial_cmdsn,

3680 ev->u.c_bound_session.cmds_max,

3681 ev->u.c_bound_session.queue_depth);

3682 break;

3683 case ISCSI_UEVENT_DESTROY_SESSION:

3684 session = iscsi_session_lookup(ev->u.d_session.sid);

3685 if (!session)

3686 err = -EINVAL;

3687 else if (iscsi_session_has_conns(ev->u.d_session.sid))

3688 err = -EBUSY;

3689 else

3690 transport->destroy_session(session);

3691 break;

3692 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:

3693 session = iscsi_session_lookup(ev->u.d_session.sid);

3694 if (!session)

3695 err = -EINVAL;

3696 else if (iscsi_session_has_conns(ev->u.d_session.sid))

3697 err = -EBUSY;

3698 else {

3699 unsigned long flags;

3700

3701 /* Prevent this session from being found again */

3702 spin_lock_irqsave(&sesslock, flags);

3703 list_del_init(&session->sess_list);

3704 spin_unlock_irqrestore(&sesslock, flags);

3705

3706 queue_work(iscsi_destroy_workq, &session->destroy_work);

3707 }

3708 break;

3709 case ISCSI_UEVENT_UNBIND_SESSION:

3710 session = iscsi_session_lookup(ev->u.d_session.sid);

3711 if (session)

3712 scsi_queue_work(iscsi_session_to_shost(session),

3713 &session->unbind_work);

3714 else

3715 err = -EINVAL;

3716 break;

3717 case ISCSI_UEVENT_CREATE_CONN:

3718 err = iscsi_if_create_conn(transport, ev);

3719 break;

3720 case ISCSI_UEVENT_DESTROY_CONN:

3721 err = iscsi_if_destroy_conn(transport, ev);

3722 break;

3723 case ISCSI_UEVENT_BIND_CONN:

3724 session = iscsi_session_lookup(ev->u.b_conn.sid);

3725 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);

3726

3727 if (conn && conn->ep)

3728 iscsi_if_ep_disconnect(transport, conn->ep->id);

3729

3730 if (!session || !conn) {

3731 err = -EINVAL;

3732 break;

3733 }

3734

3735 mutex_lock(&conn_mutex);

3736 ev->r.retcode = transport->bind_conn(session, conn,

3737 ev->u.b_conn.transport_eph,

3738 ev->u.b_conn.is_leading);

3739 if (!ev->r.retcode)

3740 conn->state = ISCSI_CONN_BOUND;

3741 mutex_unlock(&conn_mutex);

3742

3743 if (ev->r.retcode || !transport->ep_connect)

3744 break;

3745

3746 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);

3747 if (ep) {

3748 ep->conn = conn;

3749

3750 mutex_lock(&conn->ep_mutex);

3751 conn->ep = ep;

3752 mutex_unlock(&conn->ep_mutex);

3753 } else

3754 iscsi_cls_conn_printk(KERN_ERR, conn,

3755 "Could not set ep conn "

3756 "binding\n");

3757 break;

3758 case ISCSI_UEVENT_SET_PARAM:

3759 err = iscsi_set_param(transport, ev);

3760 break;

3761 case ISCSI_UEVENT_START_CONN:

3762 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);

3763 if (conn) {

3764 mutex_lock(&conn_mutex);

3765 ev->r.retcode = transport->start_conn(conn);

3766 if (!ev->r.retcode)

3767 conn->state = ISCSI_CONN_UP;

3768 mutex_unlock(&conn_mutex);

3769 }

3770 else

3771 err = -EINVAL;

3772 break;

3773 case ISCSI_UEVENT_STOP_CONN:

3774 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);

3775 if (conn)

3776 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag);

3777 else

3778 err = -EINVAL;

3779 break;

3780 case ISCSI_UEVENT_SEND_PDU:

3781 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev);

3782

3783 if ((ev->u.send_pdu.hdr_size > pdu_len) ||

3784 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {

3785 err = -EINVAL;

3786 break;

3787 }

3788

3789 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);

3790 if (conn) {

3791 mutex_lock(&conn_mutex);

3792 ev->r.retcode = transport->send_pdu(conn,

3793 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),

3794 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,

3795 ev->u.send_pdu.data_size);

3796 mutex_unlock(&conn_mutex);

3797 }

3798 else

3799 err = -EINVAL;

3800 break;

3801 case ISCSI_UEVENT_GET_STATS:

3802 err = iscsi_if_get_stats(transport, nlh);

3803 break;

3804 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:

3805 case ISCSI_UEVENT_TRANSPORT_EP_POLL:

3806 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:

3807 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:

3808 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);

3809 break;

3810 case ISCSI_UEVENT_TGT_DSCVR:

3811 err = iscsi_tgt_dscvr(transport, ev);

3812 break;

3813 case ISCSI_UEVENT_SET_HOST_PARAM:

3814 err = iscsi_set_host_param(transport, ev);

3815 break;

3816 case ISCSI_UEVENT_PATH_UPDATE:

3817 err = iscsi_set_path(transport, ev);

3818 break;

3819 case ISCSI_UEVENT_SET_IFACE_PARAMS:

3820 err = iscsi_set_iface_params(transport, ev,

3821 nlmsg_attrlen(nlh, sizeof(*ev)));

3822 break;

3823 case ISCSI_UEVENT_PING:

3824 err = iscsi_send_ping(transport, ev);

3825 break;

3826 case ISCSI_UEVENT_GET_CHAP:

3827 err = iscsi_get_chap(transport, nlh);

3828 break;

3829 case ISCSI_UEVENT_DELETE_CHAP:

3830 err = iscsi_delete_chap(transport, ev);

3831 break;

3832 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:

3833 err = iscsi_set_flashnode_param(transport, ev,

3834 nlmsg_attrlen(nlh,

3835 sizeof(*ev)));

3836 break;

3837 case ISCSI_UEVENT_NEW_FLASHNODE:

3838 err = iscsi_new_flashnode(transport, ev,

3839 nlmsg_attrlen(nlh, sizeof(*ev)));

3840 break;

3841 case ISCSI_UEVENT_DEL_FLASHNODE:

3842 err = iscsi_del_flashnode(transport, ev);

3843 break;

3844 case ISCSI_UEVENT_LOGIN_FLASHNODE:

3845 err = iscsi_login_flashnode(transport, ev);

3846 break;

3847 case ISCSI_UEVENT_LOGOUT_FLASHNODE:

3848 err = iscsi_logout_flashnode(transport, ev);

3849 break;

3850 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:

3851 err = iscsi_logout_flashnode_sid(transport, ev);

3852 break;

3853 case ISCSI_UEVENT_SET_CHAP:

3854 err = iscsi_set_chap(transport, ev,

3855 nlmsg_attrlen(nlh, sizeof(*ev)));

3856 break;

3857 case ISCSI_UEVENT_GET_HOST_STATS:

3858 err = iscsi_get_host_stats(transport, nlh);

3859 break;

3860 default:

3861 err = -ENOSYS;

3862 break;

3863 }

3864

3865 module_put(transport->owner);

3866 return err;

3867 }

3868

3869 /*

3870 * Get message from skb. Each message is processed by iscsi_if_recv_msg.

3871 * Malformed skbs with wrong lengths or invalid creds are not processed.

3872 */

3873 static void

3874 iscsi_if_rx(struct sk_buff *skb)

3875 {

3876 u32 portid = NETLINK_CB(skb).portid;

3877

3878 mutex_lock(&rx_queue_mutex);

3879 while (skb->len >= NLMSG_HDRLEN) {

3880 int err;

3881 uint32_t rlen;

3882 struct nlmsghdr *nlh;

3883 struct iscsi_uevent *ev;

3884 uint32_t group;

3885 int retries = ISCSI_SEND_MAX_ALLOWED;

3886

3887 nlh = nlmsg_hdr(skb);

3888 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||

3889 skb->len < nlh->nlmsg_len) {

3890 break;

3891 }

3892

3893 ev = nlmsg_data(nlh);

3894 rlen = NLMSG_ALIGN(nlh->nlmsg_len);

3895 if (rlen > skb->len)

3896 rlen = skb->len;

3897

3898 err = iscsi_if_recv_msg(skb, nlh, &group);

3899 if (err) {

3900 ev->type = ISCSI_KEVENT_IF_ERROR;

3901 ev->iferror = err;

3902 }

3903 do {

3904 /*

3905 * special case for GET_STATS:

3906 * on success - sending reply and stats from

3907 * inside of if_recv_msg(),

3908 * on error - fall through.

3909 */

3910 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)

3911 break;

3912 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)

3913 break;

3914 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,

3915 ev, sizeof(*ev));

3916 if (err == -EAGAIN && --retries < 0) {

3917 printk(KERN_WARNING "Send reply failed, error %d\n", err);

3918 break;

3919 }

3920 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);

3921 skb_pull(skb, rlen);

3922 }

3923 mutex_unlock(&rx_queue_mutex);

3924 }

3925

3926 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \

3927 struct device_attribute dev_attr_##_prefix##_##_name = \

3928 __ATTR(_name,_mode,_show,_store)

3929

3930 /*

3931 * iSCSI connection attrs

3932 */

3933 #define iscsi_conn_attr_show(param) \

3934 static ssize_t \

3935 show_conn_param_##param(struct device *dev, \

3936 struct device_attribute *attr, char *buf) \

3937 { \

3938 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \

3939 struct iscsi_transport *t = conn->transport; \

3940 return t->get_conn_param(conn, param, buf); \

3941 }

3942

3943 #define iscsi_conn_attr(field, param) \

3944 iscsi_conn_attr_show(param) \

3945 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \

3946 NULL);

3947

3948 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);

3949 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);

3950 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);

3951 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);

3952 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);

3953 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);

3954 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);

3955 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);

3956 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);

3957 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);

3958 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);

3959 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);

3960 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);

3961 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);

3962 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);

3963 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);

3964 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);

3965 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);

3966 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);

3967 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);

3968 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);

3969 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);

3970 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);

3971 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);

3972 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);

3973 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);

3974 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);

3975 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);

3976

3977 static const char *const connection_state_names[] = {

3978 [ISCSI_CONN_UP] = "up",

3979 [ISCSI_CONN_DOWN] = "down",

3980 [ISCSI_CONN_FAILED] = "failed",

3981 [ISCSI_CONN_BOUND] = "bound"

3982 };

3983

3984 static ssize_t show_conn_state(struct device *dev,

3985 struct device_attribute *attr, char *buf)

3986 {

3987 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);

3988 const char *state = "unknown";

3989

3990 if (conn->state >= 0 &&

3991 conn->state < ARRAY_SIZE(connection_state_names))

3992 state = connection_state_names[conn->state];

3993

3994 return sysfs_emit(buf, "%s\n", state);

3995 }

3996 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,

3997 NULL);

3998

3999 #define iscsi_conn_ep_attr_show(param) \

4000 static ssize_t show_conn_ep_param_##param(struct device *dev, \

4001 struct device_attribute *attr,\

4002 char *buf) \

4003 { \

4004 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \

4005 struct iscsi_transport *t = conn->transport; \

4006 struct iscsi_endpoint *ep; \

4007 ssize_t rc; \

4008 \

4009 /* \

4010 * Need to make sure ep_disconnect does not free the LLD's \

4011 * interconnect resources while we are trying to read them. \

4012 */ \

4013 mutex_lock(&conn->ep_mutex); \

4014 ep = conn->ep; \

4015 if (!ep && t->ep_connect) { \

4016 mutex_unlock(&conn->ep_mutex); \

4017 return -ENOTCONN; \

4018 } \

4019 \

4020 if (ep) \

4021 rc = t->get_ep_param(ep, param, buf); \

4022 else \

4023 rc = t->get_conn_param(conn, param, buf); \

4024 mutex_unlock(&conn->ep_mutex); \

4025 return rc; \

4026 }

4027

4028 #define iscsi_conn_ep_attr(field, param) \

4029 iscsi_conn_ep_attr_show(param) \

4030 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \

4031 show_conn_ep_param_##param, NULL);

4032

4033 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);

4034 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);

4035

4036 static struct attribute *iscsi_conn_attrs[] = {

4037 &dev_attr_conn_max_recv_dlength.attr,

4038 &dev_attr_conn_max_xmit_dlength.attr,

4039 &dev_attr_conn_header_digest.attr,

4040 &dev_attr_conn_data_digest.attr,

4041 &dev_attr_conn_ifmarker.attr,

4042 &dev_attr_conn_ofmarker.attr,

4043 &dev_attr_conn_address.attr,

4044 &dev_attr_conn_port.attr,

4045 &dev_attr_conn_exp_statsn.attr,

4046 &dev_attr_conn_persistent_address.attr,

4047 &dev_attr_conn_persistent_port.attr,

4048 &dev_attr_conn_ping_tmo.attr,

4049 &dev_attr_conn_recv_tmo.attr,

4050 &dev_attr_conn_local_port.attr,

4051 &dev_attr_conn_statsn.attr,

4052 &dev_attr_conn_keepalive_tmo.attr,

4053 &dev_attr_conn_max_segment_size.attr,

4054 &dev_attr_conn_tcp_timestamp_stat.attr,

4055 &dev_attr_conn_tcp_wsf_disable.attr,

4056 &dev_attr_conn_tcp_nagle_disable.attr,

4057 &dev_attr_conn_tcp_timer_scale.attr,

4058 &dev_attr_conn_tcp_timestamp_enable.attr,

4059 &dev_attr_conn_fragment_disable.attr,

4060 &dev_attr_conn_ipv4_tos.attr,

4061 &dev_attr_conn_ipv6_traffic_class.attr,

4062 &dev_attr_conn_ipv6_flow_label.attr,

4063 &dev_attr_conn_is_fw_assigned_ipv6.attr,

4064 &dev_attr_conn_tcp_xmit_wsf.attr,

4065 &dev_attr_conn_tcp_recv_wsf.attr,

4066 &dev_attr_conn_local_ipaddr.attr,

4067 &dev_attr_conn_state.attr,

4068 NULL,

4069 };

4070

4071 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,

4072 struct attribute *attr, int i)

4073 {

4074 struct device *cdev = container_of(kobj, struct device, kobj);

4075 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);

4076 struct iscsi_transport *t = conn->transport;

4077 int param;

4078

4079 if (attr == &dev_attr_conn_max_recv_dlength.attr)

4080 param = ISCSI_PARAM_MAX_RECV_DLENGTH;

4081 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)

4082 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;

4083 else if (attr == &dev_attr_conn_header_digest.attr)

4084 param = ISCSI_PARAM_HDRDGST_EN;

4085 else if (attr == &dev_attr_conn_data_digest.attr)

4086 param = ISCSI_PARAM_DATADGST_EN;

4087 else if (attr == &dev_attr_conn_ifmarker.attr)

4088 param = ISCSI_PARAM_IFMARKER_EN;

4089 else if (attr == &dev_attr_conn_ofmarker.attr)

4090 param = ISCSI_PARAM_OFMARKER_EN;

4091 else if (attr == &dev_attr_conn_address.attr)

4092 param = ISCSI_PARAM_CONN_ADDRESS;

4093 else if (attr == &dev_attr_conn_port.attr)

4094 param = ISCSI_PARAM_CONN_PORT;

4095 else if (attr == &dev_attr_conn_exp_statsn.attr)

4096 param = ISCSI_PARAM_EXP_STATSN;

4097 else if (attr == &dev_attr_conn_persistent_address.attr)

4098 param = ISCSI_PARAM_PERSISTENT_ADDRESS;

4099 else if (attr == &dev_attr_conn_persistent_port.attr)

4100 param = ISCSI_PARAM_PERSISTENT_PORT;

4101 else if (attr == &dev_attr_conn_ping_tmo.attr)

4102 param = ISCSI_PARAM_PING_TMO;

4103 else if (attr == &dev_attr_conn_recv_tmo.attr)

4104 param = ISCSI_PARAM_RECV_TMO;

4105 else if (attr == &dev_attr_conn_local_port.attr)

4106 param = ISCSI_PARAM_LOCAL_PORT;

4107 else if (attr == &dev_attr_conn_statsn.attr)

4108 param = ISCSI_PARAM_STATSN;

4109 else if (attr == &dev_attr_conn_keepalive_tmo.attr)

4110 param = ISCSI_PARAM_KEEPALIVE_TMO;

4111 else if (attr == &dev_attr_conn_max_segment_size.attr)

4112 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;

4113 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)

4114 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;

4115 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)

4116 param = ISCSI_PARAM_TCP_WSF_DISABLE;

4117 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)

4118 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;

4119 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)

4120 param = ISCSI_PARAM_TCP_TIMER_SCALE;

4121 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)

4122 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;

4123 else if (attr == &dev_attr_conn_fragment_disable.attr)

4124 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;

4125 else if (attr == &dev_attr_conn_ipv4_tos.attr)

4126 param = ISCSI_PARAM_IPV4_TOS;

4127 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)

4128 param = ISCSI_PARAM_IPV6_TC;

4129 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)

4130 param = ISCSI_PARAM_IPV6_FLOW_LABEL;

4131 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)

4132 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;

4133 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)

4134 param = ISCSI_PARAM_TCP_XMIT_WSF;

4135 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)

4136 param = ISCSI_PARAM_TCP_RECV_WSF;

4137 else if (attr == &dev_attr_conn_local_ipaddr.attr)

4138 param = ISCSI_PARAM_LOCAL_IPADDR;

4139 else if (attr == &dev_attr_conn_state.attr)

4140 return S_IRUGO;

4141 else {

4142 WARN_ONCE(1, "Invalid conn attr");

4143 return 0;

4144 }

4145

4146 return t->attr_is_visible(ISCSI_PARAM, param);

4147 }

4148

4149 static struct attribute_group iscsi_conn_group = {

4150 .attrs = iscsi_conn_attrs,

4151 .is_visible = iscsi_conn_attr_is_visible,

4152 };

4153

4154 /*

4155 * iSCSI session attrs

4156 */

4157 #define iscsi_session_attr_show(param, perm) \

4158 static ssize_t \

4159 show_session_param_##param(struct device *dev, \

4160 struct device_attribute *attr, char *buf) \

4161 { \

4162 struct iscsi_cls_session *session = \

4163 iscsi_dev_to_session(dev->parent); \

4164 struct iscsi_transport *t = session->transport; \

4165 \

4166 if (perm && !capable(CAP_SYS_ADMIN)) \

4167 return -EACCES; \

4168 return t->get_session_param(session, param, buf); \

4169 }

4170

4171 #define iscsi_session_attr(field, param, perm) \

4172 iscsi_session_attr_show(param, perm) \

4173 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \

4174 NULL);

4175 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);

4176 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);

4177 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);

4178 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);

4179 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);

4180 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);

4181 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);

4182 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);

4183 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);

4184 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);

4185 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);

4186 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);

4187 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);

4188 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);

4189 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);

4190 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);

4191 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);

4192 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);

4193 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);

4194 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);

4195 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);

4196 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);

4197 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);

4198 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);

4199 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);

4200 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);

4201 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);

4202 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);

4203 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);

4204 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);

4205 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);

4206 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);

4207 iscsi_session_attr(discovery_auth_optional,

4208 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);

4209 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);

4210 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);

4211 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);

4212 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);

4213 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);

4214 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);

4215 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);

4216

4217 static ssize_t

4218 show_priv_session_state(struct device *dev, struct device_attribute *attr,

4219 char *buf)

4220 {

4221 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);

4222 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));

4223 }

4224 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,

4225 NULL);

4226 static ssize_t

4227 show_priv_session_creator(struct device *dev, struct device_attribute *attr,

4228 char *buf)

4229 {

4230 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);

4231 return sysfs_emit(buf, "%d\n", session->creator);

4232 }

4233 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,

4234 NULL);

4235 static ssize_t

4236 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,

4237 char *buf)

4238 {

4239 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);

4240 return sysfs_emit(buf, "%d\n", session->target_id);

4241 }

4242 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,

4243 show_priv_session_target_id, NULL);

4244

4245 #define iscsi_priv_session_attr_show(field, format) \

4246 static ssize_t \

4247 show_priv_session_##field(struct device *dev, \

4248 struct device_attribute *attr, char *buf) \

4249 { \

4250 struct iscsi_cls_session *session = \

4251 iscsi_dev_to_session(dev->parent); \

4252 if (session->field == -1) \

4253 return sysfs_emit(buf, "off\n"); \

4254 return sysfs_emit(buf, format"\n", session->field); \

4255 }

4256

4257 #define iscsi_priv_session_attr_store(field) \

4258 static ssize_t \

4259 store_priv_session_##field(struct device *dev, \

4260 struct device_attribute *attr, \

4261 const char *buf, size_t count) \

4262 { \

4263 int val; \

4264 char *cp; \

4265 struct iscsi_cls_session *session = \

4266 iscsi_dev_to_session(dev->parent); \

4267 if ((session->state == ISCSI_SESSION_FREE) || \

4268 (session->state == ISCSI_SESSION_FAILED)) \

4269 return -EBUSY; \

4270 if (strncmp(buf, "off", 3) == 0) { \

4271 session->field = -1; \

4272 session->field##_sysfs_override = true; \

4273 } else { \

4274 val = simple_strtoul(buf, &cp, 0); \

4275 if (*cp != '\0' && *cp != '\n') \

4276 return -EINVAL; \

4277 session->field = val; \

4278 session->field##_sysfs_override = true; \

4279 } \

4280 return count; \

4281 }

4282

4283 #define iscsi_priv_session_rw_attr(field, format) \

4284 iscsi_priv_session_attr_show(field, format) \

4285 iscsi_priv_session_attr_store(field) \

4286 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \

4287 show_priv_session_##field, \

4288 store_priv_session_##field)

4289

4290 iscsi_priv_session_rw_attr(recovery_tmo, "%d");

4291

4292 static struct attribute *iscsi_session_attrs[] = {

4293 &dev_attr_sess_initial_r2t.attr,

4294 &dev_attr_sess_max_outstanding_r2t.attr,

4295 &dev_attr_sess_immediate_data.attr,

4296 &dev_attr_sess_first_burst_len.attr,

4297 &dev_attr_sess_max_burst_len.attr,

4298 &dev_attr_sess_data_pdu_in_order.attr,

4299 &dev_attr_sess_data_seq_in_order.attr,

4300 &dev_attr_sess_erl.attr,

4301 &dev_attr_sess_targetname.attr,

4302 &dev_attr_sess_tpgt.attr,

4303 &dev_attr_sess_password.attr,

4304 &dev_attr_sess_password_in.attr,

4305 &dev_attr_sess_username.attr,

4306 &dev_attr_sess_username_in.attr,

4307 &dev_attr_sess_fast_abort.attr,

4308 &dev_attr_sess_abort_tmo.attr,

4309 &dev_attr_sess_lu_reset_tmo.attr,

4310 &dev_attr_sess_tgt_reset_tmo.attr,

4311 &dev_attr_sess_ifacename.attr,

4312 &dev_attr_sess_initiatorname.attr,

4313 &dev_attr_sess_targetalias.attr,

4314 &dev_attr_sess_boot_root.attr,

4315 &dev_attr_sess_boot_nic.attr,

4316 &dev_attr_sess_boot_target.attr,

4317 &dev_attr_priv_sess_recovery_tmo.attr,

4318 &dev_attr_priv_sess_state.attr,

4319 &dev_attr_priv_sess_creator.attr,

4320 &dev_attr_sess_chap_out_idx.attr,

4321 &dev_attr_sess_chap_in_idx.attr,

4322 &dev_attr_priv_sess_target_id.attr,

4323 &dev_attr_sess_auto_snd_tgt_disable.attr,

4324 &dev_attr_sess_discovery_session.attr,

4325 &dev_attr_sess_portal_type.attr,

4326 &dev_attr_sess_chap_auth.attr,

4327 &dev_attr_sess_discovery_logout.attr,

4328 &dev_attr_sess_bidi_chap.attr,

4329 &dev_attr_sess_discovery_auth_optional.attr,

4330 &dev_attr_sess_def_time2wait.attr,

4331 &dev_attr_sess_def_time2retain.attr,

4332 &dev_attr_sess_isid.attr,

4333 &dev_attr_sess_tsid.attr,

4334 &dev_attr_sess_def_taskmgmt_tmo.attr,

4335 &dev_attr_sess_discovery_parent_idx.attr,

4336 &dev_attr_sess_discovery_parent_type.attr,

4337 NULL,

4338 };

4339

4340 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,

4341 struct attribute *attr, int i)

4342 {

4343 struct device *cdev = container_of(kobj, struct device, kobj);

4344 struct iscsi_cls_session *session = transport_class_to_session(cdev);

4345 struct iscsi_transport *t = session->transport;

4346 int param;

4347

4348 if (attr == &dev_attr_sess_initial_r2t.attr)

4349 param = ISCSI_PARAM_INITIAL_R2T_EN;

4350 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)

4351 param = ISCSI_PARAM_MAX_R2T;

4352 else if (attr == &dev_attr_sess_immediate_data.attr)

4353 param = ISCSI_PARAM_IMM_DATA_EN;

4354 else if (attr == &dev_attr_sess_first_burst_len.attr)

4355 param = ISCSI_PARAM_FIRST_BURST;

4356 else if (attr == &dev_attr_sess_max_burst_len.attr)

4357 param = ISCSI_PARAM_MAX_BURST;

4358 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)

4359 param = ISCSI_PARAM_PDU_INORDER_EN;

4360 else if (attr == &dev_attr_sess_data_seq_in_order.attr)

4361 param = ISCSI_PARAM_DATASEQ_INORDER_EN;

4362 else if (attr == &dev_attr_sess_erl.attr)

4363 param = ISCSI_PARAM_ERL;

4364 else if (attr == &dev_attr_sess_targetname.attr)

4365 param = ISCSI_PARAM_TARGET_NAME;

4366 else if (attr == &dev_attr_sess_tpgt.attr)

4367 param = ISCSI_PARAM_TPGT;

4368 else if (attr == &dev_attr_sess_chap_in_idx.attr)

4369 param = ISCSI_PARAM_CHAP_IN_IDX;

4370 else if (attr == &dev_attr_sess_chap_out_idx.attr)

4371 param = ISCSI_PARAM_CHAP_OUT_IDX;

4372 else if (attr == &dev_attr_sess_password.attr)

4373 param = ISCSI_PARAM_USERNAME;

4374 else if (attr == &dev_attr_sess_password_in.attr)

4375 param = ISCSI_PARAM_USERNAME_IN;

4376 else if (attr == &dev_attr_sess_username.attr)

4377 param = ISCSI_PARAM_PASSWORD;

4378 else if (attr == &dev_attr_sess_username_in.attr)

4379 param = ISCSI_PARAM_PASSWORD_IN;

4380 else if (attr == &dev_attr_sess_fast_abort.attr)

4381 param = ISCSI_PARAM_FAST_ABORT;

4382 else if (attr == &dev_attr_sess_abort_tmo.attr)

4383 param = ISCSI_PARAM_ABORT_TMO;

4384 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)

4385 param = ISCSI_PARAM_LU_RESET_TMO;

4386 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)

4387 param = ISCSI_PARAM_TGT_RESET_TMO;

4388 else if (attr == &dev_attr_sess_ifacename.attr)

4389 param = ISCSI_PARAM_IFACE_NAME;

4390 else if (attr == &dev_attr_sess_initiatorname.attr)

4391 param = ISCSI_PARAM_INITIATOR_NAME;

4392 else if (attr == &dev_attr_sess_targetalias.attr)

4393 param = ISCSI_PARAM_TARGET_ALIAS;

4394 else if (attr == &dev_attr_sess_boot_root.attr)

4395 param = ISCSI_PARAM_BOOT_ROOT;

4396 else if (attr == &dev_attr_sess_boot_nic.attr)

4397 param = ISCSI_PARAM_BOOT_NIC;

4398 else if (attr == &dev_attr_sess_boot_target.attr)

4399 param = ISCSI_PARAM_BOOT_TARGET;

4400 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)

4401 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;

4402 else if (attr == &dev_attr_sess_discovery_session.attr)

4403 param = ISCSI_PARAM_DISCOVERY_SESS;

4404 else if (attr == &dev_attr_sess_portal_type.attr)

4405 param = ISCSI_PARAM_PORTAL_TYPE;

4406 else if (attr == &dev_attr_sess_chap_auth.attr)

4407 param = ISCSI_PARAM_CHAP_AUTH_EN;

4408 else if (attr == &dev_attr_sess_discovery_logout.attr)

4409 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;

4410 else if (attr == &dev_attr_sess_bidi_chap.attr)

4411 param = ISCSI_PARAM_BIDI_CHAP_EN;

4412 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)

4413 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;

4414 else if (attr == &dev_attr_sess_def_time2wait.attr)

4415 param = ISCSI_PARAM_DEF_TIME2WAIT;

4416 else if (attr == &dev_attr_sess_def_time2retain.attr)

4417 param = ISCSI_PARAM_DEF_TIME2RETAIN;

4418 else if (attr == &dev_attr_sess_isid.attr)

4419 param = ISCSI_PARAM_ISID;

4420 else if (attr == &dev_attr_sess_tsid.attr)

4421 param = ISCSI_PARAM_TSID;

4422 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)

4423 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;

4424 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)

4425 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;

4426 else if (attr == &dev_attr_sess_discovery_parent_type.attr)

4427 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;

4428 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)

4429 return S_IRUGO | S_IWUSR;

4430 else if (attr == &dev_attr_priv_sess_state.attr)

4431 return S_IRUGO;

4432 else if (attr == &dev_attr_priv_sess_creator.attr)

4433 return S_IRUGO;

4434 else if (attr == &dev_attr_priv_sess_target_id.attr)

4435 return S_IRUGO;

4436 else {

4437 WARN_ONCE(1, "Invalid session attr");

4438 return 0;

4439 }

4440

4441 return t->attr_is_visible(ISCSI_PARAM, param);

4442 }

4443

4444 static struct attribute_group iscsi_session_group = {

4445 .attrs = iscsi_session_attrs,

4446 .is_visible = iscsi_session_attr_is_visible,

4447 };

4448

4449 /*

4450 * iSCSI host attrs

4451 */

4452 #define iscsi_host_attr_show(param) \

4453 static ssize_t \

4454 show_host_param_##param(struct device *dev, \

4455 struct device_attribute *attr, char *buf) \

4456 { \

4457 struct Scsi_Host *shost = transport_class_to_shost(dev); \

4458 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \

4459 return priv->iscsi_transport->get_host_param(shost, param, buf); \

4460 }

4461

4462 #define iscsi_host_attr(field, param) \

4463 iscsi_host_attr_show(param) \

4464 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \

4465 NULL);

4466

4467 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);

4468 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);

4469 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);

4470 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);

4471 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);

4472 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);

4473

4474 static struct attribute *iscsi_host_attrs[] = {

4475 &dev_attr_host_netdev.attr,

4476 &dev_attr_host_hwaddress.attr,

4477 &dev_attr_host_ipaddress.attr,

4478 &dev_attr_host_initiatorname.attr,

4479 &dev_attr_host_port_state.attr,

4480 &dev_attr_host_port_speed.attr,

4481 NULL,

4482 };

4483

4484 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,

4485 struct attribute *attr, int i)

4486 {

4487 struct device *cdev = container_of(kobj, struct device, kobj);

4488 struct Scsi_Host *shost = transport_class_to_shost(cdev);

4489 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);

4490 int param;

4491

4492 if (attr == &dev_attr_host_netdev.attr)

4493 param = ISCSI_HOST_PARAM_NETDEV_NAME;

4494 else if (attr == &dev_attr_host_hwaddress.attr)

4495 param = ISCSI_HOST_PARAM_HWADDRESS;

4496 else if (attr == &dev_attr_host_ipaddress.attr)

4497 param = ISCSI_HOST_PARAM_IPADDRESS;

4498 else if (attr == &dev_attr_host_initiatorname.attr)

4499 param = ISCSI_HOST_PARAM_INITIATOR_NAME;

4500 else if (attr == &dev_attr_host_port_state.attr)

4501 param = ISCSI_HOST_PARAM_PORT_STATE;

4502 else if (attr == &dev_attr_host_port_speed.attr)

4503 param = ISCSI_HOST_PARAM_PORT_SPEED;

4504 else {

4505 WARN_ONCE(1, "Invalid host attr");

4506 return 0;

4507 }

4508

4509 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);

4510 }

4511

4512 static struct attribute_group iscsi_host_group = {

4513 .attrs = iscsi_host_attrs,

4514 .is_visible = iscsi_host_attr_is_visible,

4515 };

4516

4517 /* convert iscsi_port_speed values to ascii string name */

4518 static const struct {

4519 enum iscsi_port_speed value;

4520 char *name;

4521 } iscsi_port_speed_names[] = {

4522 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },

4523 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },

4524 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },

4525 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },

4526 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },

4527 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },

4528 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },

4529 };

4530

4531 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)

4532 {

4533 int i;

4534 char *speed = "Unknown!";

4535 struct iscsi_cls_host *ihost = shost->shost_data;

4536 uint32_t port_speed = ihost->port_speed;

4537

4538 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {

4539 if (iscsi_port_speed_names[i].value & port_speed) {

4540 speed = iscsi_port_speed_names[i].name;

4541 break;

4542 }

4543 }

4544 return speed;

4545 }

4546 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);

4547

4548 /* convert iscsi_port_state values to ascii string name */

4549 static const struct {

4550 enum iscsi_port_state value;

4551 char *name;

4552 } iscsi_port_state_names[] = {

4553 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },

4554 {ISCSI_PORT_STATE_UP, "LINK UP" },

4555 };

4556

4557 char *iscsi_get_port_state_name(struct Scsi_Host *shost)

4558 {

4559 int i;

4560 char *state = "Unknown!";

4561 struct iscsi_cls_host *ihost = shost->shost_data;

4562 uint32_t port_state = ihost->port_state;

4563

4564 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {

4565 if (iscsi_port_state_names[i].value & port_state) {

4566 state = iscsi_port_state_names[i].name;

4567 break;

4568 }

4569 }

4570 return state;

4571 }

4572 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);

4573

4574 static int iscsi_session_match(struct attribute_container *cont,

4575 struct device *dev)

4576 {

4577 struct iscsi_cls_session *session;

4578 struct Scsi_Host *shost;

4579 struct iscsi_internal *priv;

4580

4581 if (!iscsi_is_session_dev(dev))

4582 return 0;

4583

4584 session = iscsi_dev_to_session(dev);

4585 shost = iscsi_session_to_shost(session);

4586 if (!shost->transportt)

4587 return 0;

4588

4589 priv = to_iscsi_internal(shost->transportt);

4590 if (priv->session_cont.ac.class != &iscsi_session_class.class)

4591 return 0;

4592

4593 return &priv->session_cont.ac == cont;

4594 }

4595

4596 static int iscsi_conn_match(struct attribute_container *cont,

4597 struct device *dev)

4598 {

4599 struct iscsi_cls_session *session;

4600 struct iscsi_cls_conn *conn;

4601 struct Scsi_Host *shost;

4602 struct iscsi_internal *priv;

4603

4604 if (!iscsi_is_conn_dev(dev))

4605 return 0;

4606

4607 conn = iscsi_dev_to_conn(dev);

4608 session = iscsi_dev_to_session(conn->dev.parent);

4609 shost = iscsi_session_to_shost(session);

4610

4611 if (!shost->transportt)

4612 return 0;

4613

4614 priv = to_iscsi_internal(shost->transportt);

4615 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)

4616 return 0;

4617

4618 return &priv->conn_cont.ac == cont;

4619 }

4620

4621 static int iscsi_host_match(struct attribute_container *cont,

4622 struct device *dev)

4623 {

4624 struct Scsi_Host *shost;

4625 struct iscsi_internal *priv;

4626

4627 if (!scsi_is_host_device(dev))

4628 return 0;

4629

4630 shost = dev_to_shost(dev);

4631 if (!shost->transportt ||

4632 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)

4633 return 0;

4634

4635 priv = to_iscsi_internal(shost->transportt);

4636 return &priv->t.host_attrs.ac == cont;

4637 }

4638

4639 struct scsi_transport_template *

4640 iscsi_register_transport(struct iscsi_transport *tt)

4641 {

4642 struct iscsi_internal *priv;

4643 unsigned long flags;

4644 int err;

4645

4646 BUG_ON(!tt);

4647

4648 priv = iscsi_if_transport_lookup(tt);

4649 if (priv)

4650 return NULL;

4651

4652 priv = kzalloc(sizeof(*priv), GFP_KERNEL);

4653 if (!priv)

4654 return NULL;

4655 INIT_LIST_HEAD(&priv->list);

4656 priv->iscsi_transport = tt;

4657 priv->t.user_scan = iscsi_user_scan;

4658 priv->t.create_work_queue = 1;

4659

4660 priv->dev.class = &iscsi_transport_class;

4661 dev_set_name(&priv->dev, "%s", tt->name);

4662 err = device_register(&priv->dev);

4663 if (err)

4664 goto free_priv;

4665

4666 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);

4667 if (err)

4668 goto unregister_dev;

4669

4670 /* host parameters */

4671 priv->t.host_attrs.ac.class = &iscsi_host_class.class;

4672 priv->t.host_attrs.ac.match = iscsi_host_match;

4673 priv->t.host_attrs.ac.grp = &iscsi_host_group;

4674 priv->t.host_size = sizeof(struct iscsi_cls_host);

4675 transport_container_register(&priv->t.host_attrs);

4676

4677 /* connection parameters */

4678 priv->conn_cont.ac.class = &iscsi_connection_class.class;

4679 priv->conn_cont.ac.match = iscsi_conn_match;

4680 priv->conn_cont.ac.grp = &iscsi_conn_group;

4681 transport_container_register(&priv->conn_cont);

4682

4683 /* session parameters */

4684 priv->session_cont.ac.class = &iscsi_session_class.class;

4685 priv->session_cont.ac.match = iscsi_session_match;

4686 priv->session_cont.ac.grp = &iscsi_session_group;

4687 transport_container_register(&priv->session_cont);

4688

4689 spin_lock_irqsave(&iscsi_transport_lock, flags);

4690 list_add(&priv->list, &iscsi_transports);

4691 spin_unlock_irqrestore(&iscsi_transport_lock, flags);

4692

4693 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);

4694 return &priv->t;

4695

4696 unregister_dev:

4697 device_unregister(&priv->dev);

4698 return NULL;

4699 free_priv:

4700 kfree(priv);

4701 return NULL;

4702 }

4703 EXPORT_SYMBOL_GPL(iscsi_register_transport);

4704

4705 int iscsi_unregister_transport(struct iscsi_transport *tt)

4706 {

4707 struct iscsi_internal *priv;

4708 unsigned long flags;

4709

4710 BUG_ON(!tt);

4711

4712 mutex_lock(&rx_queue_mutex);

4713

4714 priv = iscsi_if_transport_lookup(tt);

4715 BUG_ON (!priv);

4716

4717 spin_lock_irqsave(&iscsi_transport_lock, flags);

4718 list_del(&priv->list);

4719 spin_unlock_irqrestore(&iscsi_transport_lock, flags);

4720

4721 transport_container_unregister(&priv->conn_cont);

4722 transport_container_unregister(&priv->session_cont);

4723 transport_container_unregister(&priv->t.host_attrs);

4724

4725 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);

4726 device_unregister(&priv->dev);

4727 mutex_unlock(&rx_queue_mutex);

4728

4729 return 0;

4730 }

4731 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);

4732

4733 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),

4734 struct device *dev, const char *fmt, ...)

4735 {

4736 struct va_format vaf;

4737 va_list args;

4738

4739 va_start(args, fmt);

4740 vaf.fmt = fmt;

4741 vaf.va = &args;

4742 trace(dev, &vaf);

4743 va_end(args);

4744 }

4745 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);

4746

4747 static __init int iscsi_transport_init(void)

4748 {

4749 int err;

4750 struct netlink_kernel_cfg cfg = {

4751 .groups = 1,

4752 .input = iscsi_if_rx,

4753 };

4754 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",

4755 ISCSI_TRANSPORT_VERSION);

4756

4757 atomic_set(&iscsi_session_nr, 0);

4758

4759 err = class_register(&iscsi_transport_class);

4760 if (err)

4761 return err;

4762

4763 err = class_register(&iscsi_endpoint_class);

4764 if (err)

4765 goto unregister_transport_class;

4766

4767 err = class_register(&iscsi_iface_class);

4768 if (err)

4769 goto unregister_endpoint_class;

4770

4771 err = transport_class_register(&iscsi_host_class);

4772 if (err)

4773 goto unregister_iface_class;

4774

4775 err = transport_class_register(&iscsi_connection_class);

4776 if (err)

4777 goto unregister_host_class;

4778

4779 err = transport_class_register(&iscsi_session_class);

4780 if (err)

4781 goto unregister_conn_class;

4782

4783 err = bus_register(&iscsi_flashnode_bus);

4784 if (err)

4785 goto unregister_session_class;

4786

4787 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);

4788 if (!nls) {

4789 err = -ENOBUFS;

4790 goto unregister_flashnode_bus;

4791 }

4792

4793 iscsi_eh_timer_workq = alloc_workqueue("%s",

4794 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,

4795 1, "iscsi_eh");

4796 if (!iscsi_eh_timer_workq) {

4797 err = -ENOMEM;

4798 goto release_nls;

4799 }

4800

4801 iscsi_destroy_workq = alloc_workqueue("%s",

4802 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,

4803 1, "iscsi_destroy");

4804 if (!iscsi_destroy_workq) {

4805 err = -ENOMEM;

4806 goto destroy_wq;

4807 }

4808

4809 return 0;

4810

4811 destroy_wq:

4812 destroy_workqueue(iscsi_eh_timer_workq);

4813 release_nls:

4814 netlink_kernel_release(nls);

4815 unregister_flashnode_bus:

4816 bus_unregister(&iscsi_flashnode_bus);

4817 unregister_session_class:

4818 transport_class_unregister(&iscsi_session_class);

4819 unregister_conn_class:

4820 transport_class_unregister(&iscsi_connection_class);

4821 unregister_host_class:

4822 transport_class_unregister(&iscsi_host_class);

4823 unregister_iface_class:

4824 class_unregister(&iscsi_iface_class);

4825 unregister_endpoint_class:

4826 class_unregister(&iscsi_endpoint_class);

4827 unregister_transport_class:

4828 class_unregister(&iscsi_transport_class);

4829 return err;

4830 }

4831

4832 static void __exit iscsi_transport_exit(void)

4833 {

4834 destroy_workqueue(iscsi_destroy_workq);

4835 destroy_workqueue(iscsi_eh_timer_workq);

4836 netlink_kernel_release(nls);

4837 bus_unregister(&iscsi_flashnode_bus);

4838 transport_class_unregister(&iscsi_connection_class);

4839 transport_class_unregister(&iscsi_session_class);

4840 transport_class_unregister(&iscsi_host_class);

4841 class_unregister(&iscsi_endpoint_class);

4842 class_unregister(&iscsi_iface_class);

4843 class_unregister(&iscsi_transport_class);

4844 }

4845

4846 module_init(iscsi_transport_init);

4847 module_exit(iscsi_transport_exit);

4848

4849 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "

4850 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "

4851 "Alex Aizman <itn780@yahoo.com>");

4852 MODULE_DESCRIPTION("iSCSI Transport Interface");

4853 MODULE_LICENSE("GPL");

4854 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);

4855 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);