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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 mutex_unlock(&conn_mutex);

2479

2480 }

2481

2482 static void stop_conn_work_fn(struct work_struct *work)

2483 {

2484 struct iscsi_cls_conn *conn, *tmp;

2485 unsigned long flags;

2486 LIST_HEAD(recovery_list);

2487

2488 spin_lock_irqsave(&connlock, flags);

2489 if (list_empty(&connlist_err)) {

2490 spin_unlock_irqrestore(&connlock, flags);

2491 return;

2492 }

2493 list_splice_init(&connlist_err, &recovery_list);

2494 spin_unlock_irqrestore(&connlock, flags);

2495

2496 list_for_each_entry_safe(conn, tmp, &recovery_list, conn_list_err) {

2497 uint32_t sid = iscsi_conn_get_sid(conn);

2498 struct iscsi_cls_session *session;

2499

2500 session = iscsi_session_lookup(sid);

2501 if (session) {

2502 if (system_state != SYSTEM_RUNNING) {

2503 session->recovery_tmo = 0;

2504 iscsi_if_stop_conn(conn, STOP_CONN_TERM);

2505 } else {

2506 iscsi_if_stop_conn(conn, STOP_CONN_RECOVER);

2507 }

2508 }

2509

2510 list_del_init(&conn->conn_list_err);

2511 }

2512 }

2513

2514 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)

2515 {

2516 struct nlmsghdr *nlh;

2517 struct sk_buff *skb;

2518 struct iscsi_uevent *ev;

2519 struct iscsi_internal *priv;

2520 int len = nlmsg_total_size(sizeof(*ev));

2521 unsigned long flags;

2522

2523 spin_lock_irqsave(&connlock, flags);

2524 list_add(&conn->conn_list_err, &connlist_err);

2525 spin_unlock_irqrestore(&connlock, flags);

2526 queue_work(system_unbound_wq, &stop_conn_work);

2527

2528 priv = iscsi_if_transport_lookup(conn->transport);

2529 if (!priv)

2530 return;

2531

2532 skb = alloc_skb(len, GFP_ATOMIC);

2533 if (!skb) {

2534 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "

2535 "conn error (%d)\n", error);

2536 return;

2537 }

2538

2539 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2540 ev = nlmsg_data(nlh);

2541 ev->transport_handle = iscsi_handle(conn->transport);

2542 ev->type = ISCSI_KEVENT_CONN_ERROR;

2543 ev->r.connerror.error = error;

2544 ev->r.connerror.cid = conn->cid;

2545 ev->r.connerror.sid = iscsi_conn_get_sid(conn);

2546

2547 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);

2548

2549 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",

2550 error);

2551 }

2552 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);

2553

2554 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,

2555 enum iscsi_conn_state state)

2556 {

2557 struct nlmsghdr *nlh;

2558 struct sk_buff *skb;

2559 struct iscsi_uevent *ev;

2560 struct iscsi_internal *priv;

2561 int len = nlmsg_total_size(sizeof(*ev));

2562

2563 priv = iscsi_if_transport_lookup(conn->transport);

2564 if (!priv)

2565 return;

2566

2567 skb = alloc_skb(len, GFP_ATOMIC);

2568 if (!skb) {

2569 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "

2570 "conn login (%d)\n", state);

2571 return;

2572 }

2573

2574 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2575 ev = nlmsg_data(nlh);

2576 ev->transport_handle = iscsi_handle(conn->transport);

2577 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;

2578 ev->r.conn_login.state = state;

2579 ev->r.conn_login.cid = conn->cid;

2580 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);

2581 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);

2582

2583 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",

2584 state);

2585 }

2586 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);

2587

2588 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,

2589 enum iscsi_host_event_code code, uint32_t data_size,

2590 uint8_t *data)

2591 {

2592 struct nlmsghdr *nlh;

2593 struct sk_buff *skb;

2594 struct iscsi_uevent *ev;

2595 int len = nlmsg_total_size(sizeof(*ev) + data_size);

2596

2597 skb = alloc_skb(len, GFP_NOIO);

2598 if (!skb) {

2599 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",

2600 host_no, code);

2601 return;

2602 }

2603

2604 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2605 ev = nlmsg_data(nlh);

2606 ev->transport_handle = iscsi_handle(transport);

2607 ev->type = ISCSI_KEVENT_HOST_EVENT;

2608 ev->r.host_event.host_no = host_no;

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

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

2611

2612 if (data_size)

2613 memcpy((char *)ev + sizeof(*ev), data, data_size);

2614

2615 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);

2616 }

2617 EXPORT_SYMBOL_GPL(iscsi_post_host_event);

2618

2619 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,

2620 uint32_t status, uint32_t pid, uint32_t data_size,

2621 uint8_t *data)

2622 {

2623 struct nlmsghdr *nlh;

2624 struct sk_buff *skb;

2625 struct iscsi_uevent *ev;

2626 int len = nlmsg_total_size(sizeof(*ev) + data_size);

2627

2628 skb = alloc_skb(len, GFP_NOIO);

2629 if (!skb) {

2630 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");

2631 return;

2632 }

2633

2634 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2635 ev = nlmsg_data(nlh);

2636 ev->transport_handle = iscsi_handle(transport);

2637 ev->type = ISCSI_KEVENT_PING_COMP;

2638 ev->r.ping_comp.host_no = host_no;

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

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

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

2642 memcpy((char *)ev + sizeof(*ev), data, data_size);

2643

2644 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);

2645 }

2646 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);

2647

2648 static int

2649 iscsi_if_send_reply(u32 portid, int type, void *payload, int size)

2650 {

2651 struct sk_buff *skb;

2652 struct nlmsghdr *nlh;

2653 int len = nlmsg_total_size(size);

2654

2655 skb = alloc_skb(len, GFP_ATOMIC);

2656 if (!skb) {

2657 printk(KERN_ERR "Could not allocate skb to send reply.\n");

2658 return -ENOMEM;

2659 }

2660

2661 nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0);

2662 memcpy(nlmsg_data(nlh), payload, size);

2663 return iscsi_unicast_skb(skb, portid);

2664 }

2665

2666 static int

2667 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)

2668 {

2669 struct iscsi_uevent *ev = nlmsg_data(nlh);

2670 struct iscsi_stats *stats;

2671 struct sk_buff *skbstat;

2672 struct iscsi_cls_conn *conn;

2673 struct nlmsghdr *nlhstat;

2674 struct iscsi_uevent *evstat;

2675 struct iscsi_internal *priv;

2676 int len = nlmsg_total_size(sizeof(*ev) +

2677 sizeof(struct iscsi_stats) +

2678 sizeof(struct iscsi_stats_custom) *

2679 ISCSI_STATS_CUSTOM_MAX);

2680 int err = 0;

2681

2682 priv = iscsi_if_transport_lookup(transport);

2683 if (!priv)

2684 return -EINVAL;

2685

2686 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);

2687 if (!conn)

2688 return -EEXIST;

2689

2690 do {

2691 int actual_size;

2692

2693 skbstat = alloc_skb(len, GFP_ATOMIC);

2694 if (!skbstat) {

2695 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "

2696 "deliver stats: OOM\n");

2697 return -ENOMEM;

2698 }

2699

2700 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,

2701 (len - sizeof(*nlhstat)), 0);

2702 evstat = nlmsg_data(nlhstat);

2703 memset(evstat, 0, sizeof(*evstat));

2704 evstat->transport_handle = iscsi_handle(conn->transport);

2705 evstat->type = nlh->nlmsg_type;

2706 evstat->u.get_stats.cid =

2707 ev->u.get_stats.cid;

2708 evstat->u.get_stats.sid =

2709 ev->u.get_stats.sid;

2710 stats = (struct iscsi_stats *)

2711 ((char*)evstat + sizeof(*evstat));

2712 memset(stats, 0, sizeof(*stats));

2713

2714 transport->get_stats(conn, stats);

2715 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +

2716 sizeof(struct iscsi_stats) +

2717 sizeof(struct iscsi_stats_custom) *

2718 stats->custom_length);

2719 actual_size -= sizeof(*nlhstat);

2720 actual_size = nlmsg_msg_size(actual_size);

2721 skb_trim(skbstat, NLMSG_ALIGN(actual_size));

2722 nlhstat->nlmsg_len = actual_size;

2723

2724 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,

2725 GFP_ATOMIC);

2726 } while (err < 0 && err != -ECONNREFUSED);

2727

2728 return err;

2729 }

2730

2731 /**

2732 * iscsi_session_event - send session destr. completion event

2733 * @session: iscsi class session

2734 * @event: type of event

2735 */

2736 int iscsi_session_event(struct iscsi_cls_session *session,

2737 enum iscsi_uevent_e event)

2738 {

2739 struct iscsi_internal *priv;

2740 struct Scsi_Host *shost;

2741 struct iscsi_uevent *ev;

2742 struct sk_buff *skb;

2743 struct nlmsghdr *nlh;

2744 int rc, len = nlmsg_total_size(sizeof(*ev));

2745

2746 priv = iscsi_if_transport_lookup(session->transport);

2747 if (!priv)

2748 return -EINVAL;

2749 shost = iscsi_session_to_shost(session);

2750

2751 skb = alloc_skb(len, GFP_KERNEL);

2752 if (!skb) {

2753 iscsi_cls_session_printk(KERN_ERR, session,

2754 "Cannot notify userspace of session "

2755 "event %u\n", event);

2756 return -ENOMEM;

2757 }

2758

2759 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);

2760 ev = nlmsg_data(nlh);

2761 ev->transport_handle = iscsi_handle(session->transport);

2762

2763 ev->type = event;

2764 switch (event) {

2765 case ISCSI_KEVENT_DESTROY_SESSION:

2766 ev->r.d_session.host_no = shost->host_no;

2767 ev->r.d_session.sid = session->sid;

2768 break;

2769 case ISCSI_KEVENT_CREATE_SESSION:

2770 ev->r.c_session_ret.host_no = shost->host_no;

2771 ev->r.c_session_ret.sid = session->sid;

2772 break;

2773 case ISCSI_KEVENT_UNBIND_SESSION:

2774 ev->r.unbind_session.host_no = shost->host_no;

2775 ev->r.unbind_session.sid = session->sid;

2776 break;

2777 default:

2778 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "

2779 "%u.\n", event);

2780 kfree_skb(skb);

2781 return -EINVAL;

2782 }

2783

2784 /*

2785 * this will occur if the daemon is not up, so we just warn

2786 * the user and when the daemon is restarted it will handle it

2787 */

2788 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);

2789 if (rc == -ESRCH)

2790 iscsi_cls_session_printk(KERN_ERR, session,

2791 "Cannot notify userspace of session "

2792 "event %u. Check iscsi daemon\n",

2793 event);

2794

2795 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",

2796 event, rc);

2797 return rc;

2798 }

2799 EXPORT_SYMBOL_GPL(iscsi_session_event);

2800

2801 static int

2802 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,

2803 struct iscsi_uevent *ev, pid_t pid,

2804 uint32_t initial_cmdsn, uint16_t cmds_max,

2805 uint16_t queue_depth)

2806 {

2807 struct iscsi_transport *transport = priv->iscsi_transport;

2808 struct iscsi_cls_session *session;

2809 struct Scsi_Host *shost;

2810

2811 session = transport->create_session(ep, cmds_max, queue_depth,

2812 initial_cmdsn);

2813 if (!session)

2814 return -ENOMEM;

2815

2816 session->creator = pid;

2817 shost = iscsi_session_to_shost(session);

2818 ev->r.c_session_ret.host_no = shost->host_no;

2819 ev->r.c_session_ret.sid = session->sid;

2820 ISCSI_DBG_TRANS_SESSION(session,

2821 "Completed creating transport session\n");

2822 return 0;

2823 }

2824

2825 static int

2826 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)

2827 {

2828 struct iscsi_cls_conn *conn;

2829 struct iscsi_cls_session *session;

2830

2831 session = iscsi_session_lookup(ev->u.c_conn.sid);

2832 if (!session) {

2833 printk(KERN_ERR "iscsi: invalid session %d.\n",

2834 ev->u.c_conn.sid);

2835 return -EINVAL;

2836 }

2837

2838 conn = transport->create_conn(session, ev->u.c_conn.cid);

2839 if (!conn) {

2840 iscsi_cls_session_printk(KERN_ERR, session,

2841 "couldn't create a new connection.");

2842 return -ENOMEM;

2843 }

2844

2845 ev->r.c_conn_ret.sid = session->sid;

2846 ev->r.c_conn_ret.cid = conn->cid;

2847

2848 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");

2849 return 0;

2850 }

2851

2852 static int

2853 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)

2854 {

2855 struct iscsi_cls_conn *conn;

2856 unsigned long flags;

2857

2858 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);

2859 if (!conn)

2860 return -EINVAL;

2861

2862 spin_lock_irqsave(&connlock, flags);

2863 if (!list_empty(&conn->conn_list_err)) {

2864 spin_unlock_irqrestore(&connlock, flags);

2865 return -EAGAIN;

2866 }

2867 spin_unlock_irqrestore(&connlock, flags);

2868

2869 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");

2870

2871 mutex_lock(&conn_mutex);

2872 if (transport->destroy_conn)

2873 transport->destroy_conn(conn);

2874 mutex_unlock(&conn_mutex);

2875

2876 return 0;

2877 }

2878

2879 static int

2880 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)

2881 {

2882 char *data = (char*)ev + sizeof(*ev);

2883 struct iscsi_cls_conn *conn;

2884 struct iscsi_cls_session *session;

2885 int err = 0, value = 0;

2886

2887 if (ev->u.set_param.len > PAGE_SIZE)

2888 return -EINVAL;

2889

2890 session = iscsi_session_lookup(ev->u.set_param.sid);

2891 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);

2892 if (!conn || !session)

2893 return -EINVAL;

2894

2895 switch (ev->u.set_param.param) {

2896 case ISCSI_PARAM_SESS_RECOVERY_TMO:

2897 sscanf(data, "%d", &value);

2898 if (!session->recovery_tmo_sysfs_override)

2899 session->recovery_tmo = value;

2900 break;

2901 default:

2902 err = transport->set_param(conn, ev->u.set_param.param,

2903 data, ev->u.set_param.len);

2904 }

2905

2906 return err;

2907 }

2908

2909 static int iscsi_if_ep_connect(struct iscsi_transport *transport,

2910 struct iscsi_uevent *ev, int msg_type)

2911 {

2912 struct iscsi_endpoint *ep;

2913 struct sockaddr *dst_addr;

2914 struct Scsi_Host *shost = NULL;

2915 int non_blocking, err = 0;

2916

2917 if (!transport->ep_connect)

2918 return -EINVAL;

2919

2920 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {

2921 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);

2922 if (!shost) {

2923 printk(KERN_ERR "ep connect failed. Could not find "

2924 "host no %u\n",

2925 ev->u.ep_connect_through_host.host_no);

2926 return -ENODEV;

2927 }

2928 non_blocking = ev->u.ep_connect_through_host.non_blocking;

2929 } else

2930 non_blocking = ev->u.ep_connect.non_blocking;

2931

2932 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));

2933 ep = transport->ep_connect(shost, dst_addr, non_blocking);

2934 if (IS_ERR(ep)) {

2935 err = PTR_ERR(ep);

2936 goto release_host;

2937 }

2938

2939 ev->r.ep_connect_ret.handle = ep->id;

2940 release_host:

2941 if (shost)

2942 scsi_host_put(shost);

2943 return err;

2944 }

2945

2946 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,

2947 u64 ep_handle)

2948 {

2949 struct iscsi_cls_conn *conn;

2950 struct iscsi_endpoint *ep;

2951

2952 if (!transport->ep_disconnect)

2953 return -EINVAL;

2954

2955 ep = iscsi_lookup_endpoint(ep_handle);

2956 if (!ep)

2957 return -EINVAL;

2958 conn = ep->conn;

2959 if (conn) {

2960 mutex_lock(&conn->ep_mutex);

2961 conn->ep = NULL;

2962 mutex_unlock(&conn->ep_mutex);

2963 }

2964

2965 transport->ep_disconnect(ep);

2966 return 0;

2967 }

2968

2969 static int

2970 iscsi_if_transport_ep(struct iscsi_transport *transport,

2971 struct iscsi_uevent *ev, int msg_type)

2972 {

2973 struct iscsi_endpoint *ep;

2974 int rc = 0;

2975

2976 switch (msg_type) {

2977 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:

2978 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:

2979 rc = iscsi_if_ep_connect(transport, ev, msg_type);

2980 break;

2981 case ISCSI_UEVENT_TRANSPORT_EP_POLL:

2982 if (!transport->ep_poll)

2983 return -EINVAL;

2984

2985 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);

2986 if (!ep)

2987 return -EINVAL;

2988

2989 ev->r.retcode = transport->ep_poll(ep,

2990 ev->u.ep_poll.timeout_ms);

2991 break;

2992 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:

2993 rc = iscsi_if_ep_disconnect(transport,

2994 ev->u.ep_disconnect.ep_handle);

2995 break;

2996 }

2997 return rc;

2998 }

2999

3000 static int

3001 iscsi_tgt_dscvr(struct iscsi_transport *transport,

3002 struct iscsi_uevent *ev)

3003 {

3004 struct Scsi_Host *shost;

3005 struct sockaddr *dst_addr;

3006 int err;

3007

3008 if (!transport->tgt_dscvr)

3009 return -EINVAL;

3010

3011 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);

3012 if (!shost) {

3013 printk(KERN_ERR "target discovery could not find host no %u\n",

3014 ev->u.tgt_dscvr.host_no);

3015 return -ENODEV;

3016 }

3017

3018

3019 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));

3020 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,

3021 ev->u.tgt_dscvr.enable, dst_addr);

3022 scsi_host_put(shost);

3023 return err;

3024 }

3025

3026 static int

3027 iscsi_set_host_param(struct iscsi_transport *transport,

3028 struct iscsi_uevent *ev)

3029 {

3030 char *data = (char*)ev + sizeof(*ev);

3031 struct Scsi_Host *shost;

3032 int err;

3033

3034 if (!transport->set_host_param)

3035 return -ENOSYS;

3036

3037 if (ev->u.set_host_param.len > PAGE_SIZE)

3038 return -EINVAL;

3039

3040 shost = scsi_host_lookup(ev->u.set_host_param.host_no);

3041 if (!shost) {

3042 printk(KERN_ERR "set_host_param could not find host no %u\n",

3043 ev->u.set_host_param.host_no);

3044 return -ENODEV;

3045 }

3046

3047 err = transport->set_host_param(shost, ev->u.set_host_param.param,

3048 data, ev->u.set_host_param.len);

3049 scsi_host_put(shost);

3050 return err;

3051 }

3052

3053 static int

3054 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)

3055 {

3056 struct Scsi_Host *shost;

3057 struct iscsi_path *params;

3058 int err;

3059

3060 if (!transport->set_path)

3061 return -ENOSYS;

3062

3063 shost = scsi_host_lookup(ev->u.set_path.host_no);

3064 if (!shost) {

3065 printk(KERN_ERR "set path could not find host no %u\n",

3066 ev->u.set_path.host_no);

3067 return -ENODEV;

3068 }

3069

3070 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));

3071 err = transport->set_path(shost, params);

3072

3073 scsi_host_put(shost);

3074 return err;

3075 }

3076

3077 static int iscsi_session_has_conns(int sid)

3078 {

3079 struct iscsi_cls_conn *conn;

3080 unsigned long flags;

3081 int found = 0;

3082

3083 spin_lock_irqsave(&connlock, flags);

3084 list_for_each_entry(conn, &connlist, conn_list) {

3085 if (iscsi_conn_get_sid(conn) == sid) {

3086 found = 1;

3087 break;

3088 }

3089 }

3090 spin_unlock_irqrestore(&connlock, flags);

3091

3092 return found;

3093 }

3094

3095 static int

3096 iscsi_set_iface_params(struct iscsi_transport *transport,

3097 struct iscsi_uevent *ev, uint32_t len)

3098 {

3099 char *data = (char *)ev + sizeof(*ev);

3100 struct Scsi_Host *shost;

3101 int err;

3102

3103 if (!transport->set_iface_param)

3104 return -ENOSYS;

3105

3106 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);

3107 if (!shost) {

3108 printk(KERN_ERR "set_iface_params could not find host no %u\n",

3109 ev->u.set_iface_params.host_no);

3110 return -ENODEV;

3111 }

3112

3113 err = transport->set_iface_param(shost, data, len);

3114 scsi_host_put(shost);

3115 return err;

3116 }

3117

3118 static int

3119 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)

3120 {

3121 struct Scsi_Host *shost;

3122 struct sockaddr *dst_addr;

3123 int err;

3124

3125 if (!transport->send_ping)

3126 return -ENOSYS;

3127

3128 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);

3129 if (!shost) {

3130 printk(KERN_ERR "iscsi_ping could not find host no %u\n",

3131 ev->u.iscsi_ping.host_no);

3132 return -ENODEV;

3133 }

3134

3135 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));

3136 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,

3137 ev->u.iscsi_ping.iface_type,

3138 ev->u.iscsi_ping.payload_size,

3139 ev->u.iscsi_ping.pid,

3140 dst_addr);

3141 scsi_host_put(shost);

3142 return err;

3143 }

3144

3145 static int

3146 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)

3147 {

3148 struct iscsi_uevent *ev = nlmsg_data(nlh);

3149 struct Scsi_Host *shost = NULL;

3150 struct iscsi_chap_rec *chap_rec;

3151 struct iscsi_internal *priv;

3152 struct sk_buff *skbchap;

3153 struct nlmsghdr *nlhchap;

3154 struct iscsi_uevent *evchap;

3155 uint32_t chap_buf_size;

3156 int len, err = 0;

3157 char *buf;

3158

3159 if (!transport->get_chap)

3160 return -EINVAL;

3161

3162 priv = iscsi_if_transport_lookup(transport);

3163 if (!priv)

3164 return -EINVAL;

3165

3166 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));

3167 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);

3168

3169 shost = scsi_host_lookup(ev->u.get_chap.host_no);

3170 if (!shost) {

3171 printk(KERN_ERR "%s: failed. Could not find host no %u\n",

3172 __func__, ev->u.get_chap.host_no);

3173 return -ENODEV;

3174 }

3175

3176 do {

3177 int actual_size;

3178

3179 skbchap = alloc_skb(len, GFP_KERNEL);

3180 if (!skbchap) {

3181 printk(KERN_ERR "can not deliver chap: OOM\n");

3182 err = -ENOMEM;

3183 goto exit_get_chap;

3184 }

3185

3186 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,

3187 (len - sizeof(*nlhchap)), 0);

3188 evchap = nlmsg_data(nlhchap);

3189 memset(evchap, 0, sizeof(*evchap));

3190 evchap->transport_handle = iscsi_handle(transport);

3191 evchap->type = nlh->nlmsg_type;

3192 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;

3193 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;

3194 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;

3195 buf = (char *)evchap + sizeof(*evchap);

3196 memset(buf, 0, chap_buf_size);

3197

3198 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,

3199 &evchap->u.get_chap.num_entries, buf);

3200

3201 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);

3202 skb_trim(skbchap, NLMSG_ALIGN(actual_size));

3203 nlhchap->nlmsg_len = actual_size;

3204

3205 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,

3206 GFP_KERNEL);

3207 } while (err < 0 && err != -ECONNREFUSED);

3208

3209 exit_get_chap:

3210 scsi_host_put(shost);

3211 return err;

3212 }

3213

3214 static int iscsi_set_chap(struct iscsi_transport *transport,

3215 struct iscsi_uevent *ev, uint32_t len)

3216 {

3217 char *data = (char *)ev + sizeof(*ev);

3218 struct Scsi_Host *shost;

3219 int err = 0;

3220

3221 if (!transport->set_chap)

3222 return -ENOSYS;

3223

3224 shost = scsi_host_lookup(ev->u.set_path.host_no);

3225 if (!shost) {

3226 pr_err("%s could not find host no %u\n",

3227 __func__, ev->u.set_path.host_no);

3228 return -ENODEV;

3229 }

3230

3231 err = transport->set_chap(shost, data, len);

3232 scsi_host_put(shost);

3233 return err;

3234 }

3235

3236 static int iscsi_delete_chap(struct iscsi_transport *transport,

3237 struct iscsi_uevent *ev)

3238 {

3239 struct Scsi_Host *shost;

3240 int err = 0;

3241

3242 if (!transport->delete_chap)

3243 return -ENOSYS;

3244

3245 shost = scsi_host_lookup(ev->u.delete_chap.host_no);

3246 if (!shost) {

3247 printk(KERN_ERR "%s could not find host no %u\n",

3248 __func__, ev->u.delete_chap.host_no);

3249 return -ENODEV;

3250 }

3251

3252 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);

3253 scsi_host_put(shost);

3254 return err;

3255 }

3256

3257 static const struct {

3258 enum iscsi_discovery_parent_type value;

3259 char *name;

3260 } iscsi_discovery_parent_names[] = {

3261 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },

3262 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },

3263 {ISCSI_DISC_PARENT_ISNS, "isns" },

3264 };

3265

3266 char *iscsi_get_discovery_parent_name(int parent_type)

3267 {

3268 int i;

3269 char *state = "Unknown!";

3270

3271 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {

3272 if (iscsi_discovery_parent_names[i].value & parent_type) {

3273 state = iscsi_discovery_parent_names[i].name;

3274 break;

3275 }

3276 }

3277 return state;

3278 }

3279 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);

3280

3281 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,

3282 struct iscsi_uevent *ev, uint32_t len)

3283 {

3284 char *data = (char *)ev + sizeof(*ev);

3285 struct Scsi_Host *shost;

3286 struct iscsi_bus_flash_session *fnode_sess;

3287 struct iscsi_bus_flash_conn *fnode_conn;

3288 struct device *dev;

3289 uint32_t idx;

3290 int err = 0;

3291

3292 if (!transport->set_flashnode_param) {

3293 err = -ENOSYS;

3294 goto exit_set_fnode;

3295 }

3296

3297 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);

3298 if (!shost) {

3299 pr_err("%s could not find host no %u\n",

3300 __func__, ev->u.set_flashnode.host_no);

3301 err = -ENODEV;

3302 goto exit_set_fnode;

3303 }

3304

3305 idx = ev->u.set_flashnode.flashnode_idx;

3306 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);

3307 if (!fnode_sess) {

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

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

3310 err = -ENODEV;

3311 goto put_host;

3312 }

3313

3314 dev = iscsi_find_flashnode_conn(fnode_sess);

3315 if (!dev) {

3316 err = -ENODEV;

3317 goto put_sess;

3318 }

3319

3320 fnode_conn = iscsi_dev_to_flash_conn(dev);

3321 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);

3322 put_device(dev);

3323

3324 put_sess:

3325 put_device(&fnode_sess->dev);

3326

3327 put_host:

3328 scsi_host_put(shost);

3329

3330 exit_set_fnode:

3331 return err;

3332 }

3333

3334 static int iscsi_new_flashnode(struct iscsi_transport *transport,

3335 struct iscsi_uevent *ev, uint32_t len)

3336 {

3337 char *data = (char *)ev + sizeof(*ev);

3338 struct Scsi_Host *shost;

3339 int index;

3340 int err = 0;

3341

3342 if (!transport->new_flashnode) {

3343 err = -ENOSYS;

3344 goto exit_new_fnode;

3345 }

3346

3347 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);

3348 if (!shost) {

3349 pr_err("%s could not find host no %u\n",

3350 __func__, ev->u.new_flashnode.host_no);

3351 err = -ENODEV;

3352 goto put_host;

3353 }

3354

3355 index = transport->new_flashnode(shost, data, len);

3356

3357 if (index >= 0)

3358 ev->r.new_flashnode_ret.flashnode_idx = index;

3359 else

3360 err = -EIO;

3361

3362 put_host:

3363 scsi_host_put(shost);

3364

3365 exit_new_fnode:

3366 return err;

3367 }

3368

3369 static int iscsi_del_flashnode(struct iscsi_transport *transport,

3370 struct iscsi_uevent *ev)

3371 {

3372 struct Scsi_Host *shost;

3373 struct iscsi_bus_flash_session *fnode_sess;

3374 uint32_t idx;

3375 int err = 0;

3376

3377 if (!transport->del_flashnode) {

3378 err = -ENOSYS;

3379 goto exit_del_fnode;

3380 }

3381

3382 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);

3383 if (!shost) {

3384 pr_err("%s could not find host no %u\n",

3385 __func__, ev->u.del_flashnode.host_no);

3386 err = -ENODEV;

3387 goto put_host;

3388 }

3389

3390 idx = ev->u.del_flashnode.flashnode_idx;

3391 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);

3392 if (!fnode_sess) {

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

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

3395 err = -ENODEV;

3396 goto put_host;

3397 }

3398

3399 err = transport->del_flashnode(fnode_sess);

3400 put_device(&fnode_sess->dev);

3401

3402 put_host:

3403 scsi_host_put(shost);

3404

3405 exit_del_fnode:

3406 return err;

3407 }

3408

3409 static int iscsi_login_flashnode(struct iscsi_transport *transport,

3410 struct iscsi_uevent *ev)

3411 {

3412 struct Scsi_Host *shost;

3413 struct iscsi_bus_flash_session *fnode_sess;

3414 struct iscsi_bus_flash_conn *fnode_conn;

3415 struct device *dev;

3416 uint32_t idx;

3417 int err = 0;

3418

3419 if (!transport->login_flashnode) {

3420 err = -ENOSYS;

3421 goto exit_login_fnode;

3422 }

3423

3424 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);

3425 if (!shost) {

3426 pr_err("%s could not find host no %u\n",

3427 __func__, ev->u.login_flashnode.host_no);

3428 err = -ENODEV;

3429 goto put_host;

3430 }

3431

3432 idx = ev->u.login_flashnode.flashnode_idx;

3433 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);

3434 if (!fnode_sess) {

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

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

3437 err = -ENODEV;

3438 goto put_host;

3439 }

3440

3441 dev = iscsi_find_flashnode_conn(fnode_sess);

3442 if (!dev) {

3443 err = -ENODEV;

3444 goto put_sess;

3445 }

3446

3447 fnode_conn = iscsi_dev_to_flash_conn(dev);

3448 err = transport->login_flashnode(fnode_sess, fnode_conn);

3449 put_device(dev);

3450

3451 put_sess:

3452 put_device(&fnode_sess->dev);

3453

3454 put_host:

3455 scsi_host_put(shost);

3456

3457 exit_login_fnode:

3458 return err;

3459 }

3460

3461 static int iscsi_logout_flashnode(struct iscsi_transport *transport,

3462 struct iscsi_uevent *ev)

3463 {

3464 struct Scsi_Host *shost;

3465 struct iscsi_bus_flash_session *fnode_sess;

3466 struct iscsi_bus_flash_conn *fnode_conn;

3467 struct device *dev;

3468 uint32_t idx;

3469 int err = 0;

3470

3471 if (!transport->logout_flashnode) {

3472 err = -ENOSYS;

3473 goto exit_logout_fnode;

3474 }

3475

3476 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);

3477 if (!shost) {

3478 pr_err("%s could not find host no %u\n",

3479 __func__, ev->u.logout_flashnode.host_no);

3480 err = -ENODEV;

3481 goto put_host;

3482 }

3483

3484 idx = ev->u.logout_flashnode.flashnode_idx;

3485 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);

3486 if (!fnode_sess) {

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

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

3489 err = -ENODEV;

3490 goto put_host;

3491 }

3492

3493 dev = iscsi_find_flashnode_conn(fnode_sess);

3494 if (!dev) {

3495 err = -ENODEV;

3496 goto put_sess;

3497 }

3498

3499 fnode_conn = iscsi_dev_to_flash_conn(dev);

3500

3501 err = transport->logout_flashnode(fnode_sess, fnode_conn);

3502 put_device(dev);

3503

3504 put_sess:

3505 put_device(&fnode_sess->dev);

3506

3507 put_host:

3508 scsi_host_put(shost);

3509

3510 exit_logout_fnode:

3511 return err;

3512 }

3513

3514 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,

3515 struct iscsi_uevent *ev)

3516 {

3517 struct Scsi_Host *shost;

3518 struct iscsi_cls_session *session;

3519 int err = 0;

3520

3521 if (!transport->logout_flashnode_sid) {

3522 err = -ENOSYS;

3523 goto exit_logout_sid;

3524 }

3525

3526 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);

3527 if (!shost) {

3528 pr_err("%s could not find host no %u\n",

3529 __func__, ev->u.logout_flashnode.host_no);

3530 err = -ENODEV;

3531 goto put_host;

3532 }

3533

3534 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);

3535 if (!session) {

3536 pr_err("%s could not find session id %u\n",

3537 __func__, ev->u.logout_flashnode_sid.sid);

3538 err = -EINVAL;

3539 goto put_host;

3540 }

3541

3542 err = transport->logout_flashnode_sid(session);

3543

3544 put_host:

3545 scsi_host_put(shost);

3546

3547 exit_logout_sid:

3548 return err;

3549 }

3550

3551 static int

3552 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)

3553 {

3554 struct iscsi_uevent *ev = nlmsg_data(nlh);

3555 struct Scsi_Host *shost = NULL;

3556 struct iscsi_internal *priv;

3557 struct sk_buff *skbhost_stats;

3558 struct nlmsghdr *nlhhost_stats;

3559 struct iscsi_uevent *evhost_stats;

3560 int host_stats_size = 0;

3561 int len, err = 0;

3562 char *buf;

3563

3564 if (!transport->get_host_stats)

3565 return -ENOSYS;

3566

3567 priv = iscsi_if_transport_lookup(transport);

3568 if (!priv)

3569 return -EINVAL;

3570

3571 host_stats_size = sizeof(struct iscsi_offload_host_stats);

3572 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);

3573

3574 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);

3575 if (!shost) {

3576 pr_err("%s: failed. Could not find host no %u\n",

3577 __func__, ev->u.get_host_stats.host_no);

3578 return -ENODEV;

3579 }

3580

3581 do {

3582 int actual_size;

3583

3584 skbhost_stats = alloc_skb(len, GFP_KERNEL);

3585 if (!skbhost_stats) {

3586 pr_err("cannot deliver host stats: OOM\n");

3587 err = -ENOMEM;

3588 goto exit_host_stats;

3589 }

3590

3591 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,

3592 (len - sizeof(*nlhhost_stats)), 0);

3593 evhost_stats = nlmsg_data(nlhhost_stats);

3594 memset(evhost_stats, 0, sizeof(*evhost_stats));

3595 evhost_stats->transport_handle = iscsi_handle(transport);

3596 evhost_stats->type = nlh->nlmsg_type;

3597 evhost_stats->u.get_host_stats.host_no =

3598 ev->u.get_host_stats.host_no;

3599 buf = (char *)evhost_stats + sizeof(*evhost_stats);

3600 memset(buf, 0, host_stats_size);

3601

3602 err = transport->get_host_stats(shost, buf, host_stats_size);

3603 if (err) {

3604 kfree_skb(skbhost_stats);

3605 goto exit_host_stats;

3606 }

3607

3608 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);

3609 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));

3610 nlhhost_stats->nlmsg_len = actual_size;

3611

3612 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,

3613 GFP_KERNEL);

3614 } while (err < 0 && err != -ECONNREFUSED);

3615

3616 exit_host_stats:

3617 scsi_host_put(shost);

3618 return err;

3619 }

3620

3621

3622 static int

3623 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)

3624 {

3625 int err = 0;

3626 u32 portid;

3627 u32 pdu_len;

3628 struct iscsi_uevent *ev = nlmsg_data(nlh);

3629 struct iscsi_transport *transport = NULL;

3630 struct iscsi_internal *priv;

3631 struct iscsi_cls_session *session;

3632 struct iscsi_cls_conn *conn;

3633 struct iscsi_endpoint *ep = NULL;

3634

3635 if (!netlink_capable(skb, CAP_SYS_ADMIN))

3636 return -EPERM;

3637

3638 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)

3639 *group = ISCSI_NL_GRP_UIP;

3640 else

3641 *group = ISCSI_NL_GRP_ISCSID;

3642

3643 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));

3644 if (!priv)

3645 return -EINVAL;

3646 transport = priv->iscsi_transport;

3647

3648 if (!try_module_get(transport->owner))

3649 return -EINVAL;

3650

3651 portid = NETLINK_CB(skb).portid;

3652

3653 switch (nlh->nlmsg_type) {

3654 case ISCSI_UEVENT_CREATE_SESSION:

3655 err = iscsi_if_create_session(priv, ep, ev,

3656 portid,

3657 ev->u.c_session.initial_cmdsn,

3658 ev->u.c_session.cmds_max,

3659 ev->u.c_session.queue_depth);

3660 break;

3661 case ISCSI_UEVENT_CREATE_BOUND_SESSION:

3662 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);

3663 if (!ep) {

3664 err = -EINVAL;

3665 break;

3666 }

3667

3668 err = iscsi_if_create_session(priv, ep, ev,

3669 portid,

3670 ev->u.c_bound_session.initial_cmdsn,

3671 ev->u.c_bound_session.cmds_max,

3672 ev->u.c_bound_session.queue_depth);

3673 break;

3674 case ISCSI_UEVENT_DESTROY_SESSION:

3675 session = iscsi_session_lookup(ev->u.d_session.sid);

3676 if (!session)

3677 err = -EINVAL;

3678 else if (iscsi_session_has_conns(ev->u.d_session.sid))

3679 err = -EBUSY;

3680 else

3681 transport->destroy_session(session);

3682 break;

3683 case ISCSI_UEVENT_DESTROY_SESSION_ASYNC:

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 unsigned long flags;

3691

3692 /* Prevent this session from being found again */

3693 spin_lock_irqsave(&sesslock, flags);

3694 list_del_init(&session->sess_list);

3695 spin_unlock_irqrestore(&sesslock, flags);

3696

3697 queue_work(iscsi_destroy_workq, &session->destroy_work);

3698 }

3699 break;

3700 case ISCSI_UEVENT_UNBIND_SESSION:

3701 session = iscsi_session_lookup(ev->u.d_session.sid);

3702 if (session)

3703 scsi_queue_work(iscsi_session_to_shost(session),

3704 &session->unbind_work);

3705 else

3706 err = -EINVAL;

3707 break;

3708 case ISCSI_UEVENT_CREATE_CONN:

3709 err = iscsi_if_create_conn(transport, ev);

3710 break;

3711 case ISCSI_UEVENT_DESTROY_CONN:

3712 err = iscsi_if_destroy_conn(transport, ev);

3713 break;

3714 case ISCSI_UEVENT_BIND_CONN:

3715 session = iscsi_session_lookup(ev->u.b_conn.sid);

3716 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);

3717

3718 if (conn && conn->ep)

3719 iscsi_if_ep_disconnect(transport, conn->ep->id);

3720

3721 if (!session || !conn) {

3722 err = -EINVAL;

3723 break;

3724 }

3725

3726 mutex_lock(&conn_mutex);

3727 ev->r.retcode = transport->bind_conn(session, conn,

3728 ev->u.b_conn.transport_eph,

3729 ev->u.b_conn.is_leading);

3730 mutex_unlock(&conn_mutex);

3731

3732 if (ev->r.retcode || !transport->ep_connect)

3733 break;

3734

3735 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);

3736 if (ep) {

3737 ep->conn = conn;

3738

3739 mutex_lock(&conn->ep_mutex);

3740 conn->ep = ep;

3741 mutex_unlock(&conn->ep_mutex);

3742 } else

3743 iscsi_cls_conn_printk(KERN_ERR, conn,

3744 "Could not set ep conn "

3745 "binding\n");

3746 break;

3747 case ISCSI_UEVENT_SET_PARAM:

3748 err = iscsi_set_param(transport, ev);

3749 break;

3750 case ISCSI_UEVENT_START_CONN:

3751 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);

3752 if (conn) {

3753 mutex_lock(&conn_mutex);

3754 ev->r.retcode = transport->start_conn(conn);

3755 if (!ev->r.retcode)

3756 conn->state = ISCSI_CONN_UP;

3757 mutex_unlock(&conn_mutex);

3758 }

3759 else

3760 err = -EINVAL;

3761 break;

3762 case ISCSI_UEVENT_STOP_CONN:

3763 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);

3764 if (conn)

3765 iscsi_if_stop_conn(conn, ev->u.stop_conn.flag);

3766 else

3767 err = -EINVAL;

3768 break;

3769 case ISCSI_UEVENT_SEND_PDU:

3770 pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev);

3771

3772 if ((ev->u.send_pdu.hdr_size > pdu_len) ||

3773 (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {

3774 err = -EINVAL;

3775 break;

3776 }

3777

3778 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);

3779 if (conn) {

3780 mutex_lock(&conn_mutex);

3781 ev->r.retcode = transport->send_pdu(conn,

3782 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),

3783 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,

3784 ev->u.send_pdu.data_size);

3785 mutex_unlock(&conn_mutex);

3786 }

3787 else

3788 err = -EINVAL;

3789 break;

3790 case ISCSI_UEVENT_GET_STATS:

3791 err = iscsi_if_get_stats(transport, nlh);

3792 break;

3793 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:

3794 case ISCSI_UEVENT_TRANSPORT_EP_POLL:

3795 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:

3796 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:

3797 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);

3798 break;

3799 case ISCSI_UEVENT_TGT_DSCVR:

3800 err = iscsi_tgt_dscvr(transport, ev);

3801 break;

3802 case ISCSI_UEVENT_SET_HOST_PARAM:

3803 err = iscsi_set_host_param(transport, ev);

3804 break;

3805 case ISCSI_UEVENT_PATH_UPDATE:

3806 err = iscsi_set_path(transport, ev);

3807 break;

3808 case ISCSI_UEVENT_SET_IFACE_PARAMS:

3809 err = iscsi_set_iface_params(transport, ev,

3810 nlmsg_attrlen(nlh, sizeof(*ev)));

3811 break;

3812 case ISCSI_UEVENT_PING:

3813 err = iscsi_send_ping(transport, ev);

3814 break;

3815 case ISCSI_UEVENT_GET_CHAP:

3816 err = iscsi_get_chap(transport, nlh);

3817 break;

3818 case ISCSI_UEVENT_DELETE_CHAP:

3819 err = iscsi_delete_chap(transport, ev);

3820 break;

3821 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:

3822 err = iscsi_set_flashnode_param(transport, ev,

3823 nlmsg_attrlen(nlh,

3824 sizeof(*ev)));

3825 break;

3826 case ISCSI_UEVENT_NEW_FLASHNODE:

3827 err = iscsi_new_flashnode(transport, ev,

3828 nlmsg_attrlen(nlh, sizeof(*ev)));

3829 break;

3830 case ISCSI_UEVENT_DEL_FLASHNODE:

3831 err = iscsi_del_flashnode(transport, ev);

3832 break;

3833 case ISCSI_UEVENT_LOGIN_FLASHNODE:

3834 err = iscsi_login_flashnode(transport, ev);

3835 break;

3836 case ISCSI_UEVENT_LOGOUT_FLASHNODE:

3837 err = iscsi_logout_flashnode(transport, ev);

3838 break;

3839 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:

3840 err = iscsi_logout_flashnode_sid(transport, ev);

3841 break;

3842 case ISCSI_UEVENT_SET_CHAP:

3843 err = iscsi_set_chap(transport, ev,

3844 nlmsg_attrlen(nlh, sizeof(*ev)));

3845 break;

3846 case ISCSI_UEVENT_GET_HOST_STATS:

3847 err = iscsi_get_host_stats(transport, nlh);

3848 break;

3849 default:

3850 err = -ENOSYS;

3851 break;

3852 }

3853

3854 module_put(transport->owner);

3855 return err;

3856 }

3857

3858 /*

3859 * Get message from skb. Each message is processed by iscsi_if_recv_msg.

3860 * Malformed skbs with wrong lengths or invalid creds are not processed.

3861 */

3862 static void

3863 iscsi_if_rx(struct sk_buff *skb)

3864 {

3865 u32 portid = NETLINK_CB(skb).portid;

3866

3867 mutex_lock(&rx_queue_mutex);

3868 while (skb->len >= NLMSG_HDRLEN) {

3869 int err;

3870 uint32_t rlen;

3871 struct nlmsghdr *nlh;

3872 struct iscsi_uevent *ev;

3873 uint32_t group;

3874 int retries = ISCSI_SEND_MAX_ALLOWED;

3875

3876 nlh = nlmsg_hdr(skb);

3877 if (nlh->nlmsg_len < sizeof(*nlh) + sizeof(*ev) ||

3878 skb->len < nlh->nlmsg_len) {

3879 break;

3880 }

3881

3882 ev = nlmsg_data(nlh);

3883 rlen = NLMSG_ALIGN(nlh->nlmsg_len);

3884 if (rlen > skb->len)

3885 rlen = skb->len;

3886

3887 err = iscsi_if_recv_msg(skb, nlh, &group);

3888 if (err) {

3889 ev->type = ISCSI_KEVENT_IF_ERROR;

3890 ev->iferror = err;

3891 }

3892 do {

3893 /*

3894 * special case for GET_STATS:

3895 * on success - sending reply and stats from

3896 * inside of if_recv_msg(),

3897 * on error - fall through.

3898 */

3899 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)

3900 break;

3901 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)

3902 break;

3903 err = iscsi_if_send_reply(portid, nlh->nlmsg_type,

3904 ev, sizeof(*ev));

3905 if (err == -EAGAIN && --retries < 0) {

3906 printk(KERN_WARNING "Send reply failed, error %d\n", err);

3907 break;

3908 }

3909 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);

3910 skb_pull(skb, rlen);

3911 }

3912 mutex_unlock(&rx_queue_mutex);

3913 }

3914

3915 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \

3916 struct device_attribute dev_attr_##_prefix##_##_name = \

3917 __ATTR(_name,_mode,_show,_store)

3918

3919 /*

3920 * iSCSI connection attrs

3921 */

3922 #define iscsi_conn_attr_show(param) \

3923 static ssize_t \

3924 show_conn_param_##param(struct device *dev, \

3925 struct device_attribute *attr, char *buf) \

3926 { \

3927 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \

3928 struct iscsi_transport *t = conn->transport; \

3929 return t->get_conn_param(conn, param, buf); \

3930 }

3931

3932 #define iscsi_conn_attr(field, param) \

3933 iscsi_conn_attr_show(param) \

3934 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \

3935 NULL);

3936

3937 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);

3938 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);

3939 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);

3940 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);

3941 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);

3942 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);

3943 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);

3944 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);

3945 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);

3946 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);

3947 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);

3948 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);

3949 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);

3950 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);

3951 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);

3952 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);

3953 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);

3954 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);

3955 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);

3956 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);

3957 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);

3958 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);

3959 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);

3960 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);

3961 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);

3962 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);

3963 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);

3964 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);

3965

3966 static const char *const connection_state_names[] = {

3967 [ISCSI_CONN_UP] = "up",

3968 [ISCSI_CONN_DOWN] = "down",

3969 [ISCSI_CONN_FAILED] = "failed"

3970 };

3971

3972 static ssize_t show_conn_state(struct device *dev,

3973 struct device_attribute *attr, char *buf)

3974 {

3975 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent);

3976 const char *state = "unknown";

3977

3978 if (conn->state >= 0 &&

3979 conn->state < ARRAY_SIZE(connection_state_names))

3980 state = connection_state_names[conn->state];

3981

3982 return sysfs_emit(buf, "%s\n", state);

3983 }

3984 static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,

3985 NULL);

3986

3987 #define iscsi_conn_ep_attr_show(param) \

3988 static ssize_t show_conn_ep_param_##param(struct device *dev, \

3989 struct device_attribute *attr,\

3990 char *buf) \

3991 { \

3992 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \

3993 struct iscsi_transport *t = conn->transport; \

3994 struct iscsi_endpoint *ep; \

3995 ssize_t rc; \

3996 \

3997 /* \

3998 * Need to make sure ep_disconnect does not free the LLD's \

3999 * interconnect resources while we are trying to read them. \

4000 */ \

4001 mutex_lock(&conn->ep_mutex); \

4002 ep = conn->ep; \

4003 if (!ep && t->ep_connect) { \

4004 mutex_unlock(&conn->ep_mutex); \

4005 return -ENOTCONN; \

4006 } \

4007 \

4008 if (ep) \

4009 rc = t->get_ep_param(ep, param, buf); \

4010 else \

4011 rc = t->get_conn_param(conn, param, buf); \

4012 mutex_unlock(&conn->ep_mutex); \

4013 return rc; \

4014 }

4015

4016 #define iscsi_conn_ep_attr(field, param) \

4017 iscsi_conn_ep_attr_show(param) \

4018 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \

4019 show_conn_ep_param_##param, NULL);

4020

4021 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);

4022 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);

4023

4024 static struct attribute *iscsi_conn_attrs[] = {

4025 &dev_attr_conn_max_recv_dlength.attr,

4026 &dev_attr_conn_max_xmit_dlength.attr,

4027 &dev_attr_conn_header_digest.attr,

4028 &dev_attr_conn_data_digest.attr,

4029 &dev_attr_conn_ifmarker.attr,

4030 &dev_attr_conn_ofmarker.attr,

4031 &dev_attr_conn_address.attr,

4032 &dev_attr_conn_port.attr,

4033 &dev_attr_conn_exp_statsn.attr,

4034 &dev_attr_conn_persistent_address.attr,

4035 &dev_attr_conn_persistent_port.attr,

4036 &dev_attr_conn_ping_tmo.attr,

4037 &dev_attr_conn_recv_tmo.attr,

4038 &dev_attr_conn_local_port.attr,

4039 &dev_attr_conn_statsn.attr,

4040 &dev_attr_conn_keepalive_tmo.attr,

4041 &dev_attr_conn_max_segment_size.attr,

4042 &dev_attr_conn_tcp_timestamp_stat.attr,

4043 &dev_attr_conn_tcp_wsf_disable.attr,

4044 &dev_attr_conn_tcp_nagle_disable.attr,

4045 &dev_attr_conn_tcp_timer_scale.attr,

4046 &dev_attr_conn_tcp_timestamp_enable.attr,

4047 &dev_attr_conn_fragment_disable.attr,

4048 &dev_attr_conn_ipv4_tos.attr,

4049 &dev_attr_conn_ipv6_traffic_class.attr,

4050 &dev_attr_conn_ipv6_flow_label.attr,

4051 &dev_attr_conn_is_fw_assigned_ipv6.attr,

4052 &dev_attr_conn_tcp_xmit_wsf.attr,

4053 &dev_attr_conn_tcp_recv_wsf.attr,

4054 &dev_attr_conn_local_ipaddr.attr,

4055 &dev_attr_conn_state.attr,

4056 NULL,

4057 };

4058

4059 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,

4060 struct attribute *attr, int i)

4061 {

4062 struct device *cdev = container_of(kobj, struct device, kobj);

4063 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);

4064 struct iscsi_transport *t = conn->transport;

4065 int param;

4066

4067 if (attr == &dev_attr_conn_max_recv_dlength.attr)

4068 param = ISCSI_PARAM_MAX_RECV_DLENGTH;

4069 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)

4070 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;

4071 else if (attr == &dev_attr_conn_header_digest.attr)

4072 param = ISCSI_PARAM_HDRDGST_EN;

4073 else if (attr == &dev_attr_conn_data_digest.attr)

4074 param = ISCSI_PARAM_DATADGST_EN;

4075 else if (attr == &dev_attr_conn_ifmarker.attr)

4076 param = ISCSI_PARAM_IFMARKER_EN;

4077 else if (attr == &dev_attr_conn_ofmarker.attr)

4078 param = ISCSI_PARAM_OFMARKER_EN;

4079 else if (attr == &dev_attr_conn_address.attr)

4080 param = ISCSI_PARAM_CONN_ADDRESS;

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

4082 param = ISCSI_PARAM_CONN_PORT;

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

4084 param = ISCSI_PARAM_EXP_STATSN;

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

4086 param = ISCSI_PARAM_PERSISTENT_ADDRESS;

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

4088 param = ISCSI_PARAM_PERSISTENT_PORT;

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

4090 param = ISCSI_PARAM_PING_TMO;

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

4092 param = ISCSI_PARAM_RECV_TMO;

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

4094 param = ISCSI_PARAM_LOCAL_PORT;

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

4096 param = ISCSI_PARAM_STATSN;

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

4098 param = ISCSI_PARAM_KEEPALIVE_TMO;

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

4100 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;

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

4102 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;

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

4104 param = ISCSI_PARAM_TCP_WSF_DISABLE;

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

4106 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;

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

4108 param = ISCSI_PARAM_TCP_TIMER_SCALE;

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

4110 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;

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

4112 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;

4113 else if (attr == &dev_attr_conn_ipv4_tos.attr)

4114 param = ISCSI_PARAM_IPV4_TOS;

4115 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)

4116 param = ISCSI_PARAM_IPV6_TC;

4117 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)

4118 param = ISCSI_PARAM_IPV6_FLOW_LABEL;

4119 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)

4120 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;

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

4122 param = ISCSI_PARAM_TCP_XMIT_WSF;

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

4124 param = ISCSI_PARAM_TCP_RECV_WSF;

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

4126 param = ISCSI_PARAM_LOCAL_IPADDR;

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

4128 return S_IRUGO;

4129 else {

4130 WARN_ONCE(1, "Invalid conn attr");

4131 return 0;

4132 }

4133

4134 return t->attr_is_visible(ISCSI_PARAM, param);

4135 }

4136

4137 static struct attribute_group iscsi_conn_group = {

4138 .attrs = iscsi_conn_attrs,

4139 .is_visible = iscsi_conn_attr_is_visible,

4140 };

4141

4142 /*

4143 * iSCSI session attrs

4144 */

4145 #define iscsi_session_attr_show(param, perm) \

4146 static ssize_t \

4147 show_session_param_##param(struct device *dev, \

4148 struct device_attribute *attr, char *buf) \

4149 { \

4150 struct iscsi_cls_session *session = \

4151 iscsi_dev_to_session(dev->parent); \

4152 struct iscsi_transport *t = session->transport; \

4153 \

4154 if (perm && !capable(CAP_SYS_ADMIN)) \

4155 return -EACCES; \

4156 return t->get_session_param(session, param, buf); \

4157 }

4158

4159 #define iscsi_session_attr(field, param, perm) \

4160 iscsi_session_attr_show(param, perm) \

4161 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \

4162 NULL);

4163 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);

4164 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);

4165 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);

4166 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);

4167 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);

4168 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);

4169 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);

4170 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);

4171 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);

4172 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);

4173 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);

4174 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);

4175 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);

4176 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);

4177 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);

4178 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);

4179 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);

4180 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);

4181 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);

4182 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);

4183 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);

4184 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);

4185 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);

4186 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);

4187 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);

4188 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);

4189 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);

4190 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);

4191 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);

4192 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);

4193 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);

4194 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);

4195 iscsi_session_attr(discovery_auth_optional,

4196 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);

4197 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);

4198 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);

4199 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);

4200 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);

4201 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);

4202 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);

4203 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);

4204

4205 static ssize_t

4206 show_priv_session_state(struct device *dev, struct device_attribute *attr,

4207 char *buf)

4208 {

4209 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);

4210 return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));

4211 }

4212 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,

4213 NULL);

4214 static ssize_t

4215 show_priv_session_creator(struct device *dev, struct device_attribute *attr,

4216 char *buf)

4217 {

4218 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);

4219 return sysfs_emit(buf, "%d\n", session->creator);

4220 }

4221 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,

4222 NULL);

4223 static ssize_t

4224 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,

4225 char *buf)

4226 {

4227 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);

4228 return sysfs_emit(buf, "%d\n", session->target_id);

4229 }

4230 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,

4231 show_priv_session_target_id, NULL);

4232

4233 #define iscsi_priv_session_attr_show(field, format) \

4234 static ssize_t \

4235 show_priv_session_##field(struct device *dev, \

4236 struct device_attribute *attr, char *buf) \

4237 { \

4238 struct iscsi_cls_session *session = \

4239 iscsi_dev_to_session(dev->parent); \

4240 if (session->field == -1) \

4241 return sysfs_emit(buf, "off\n"); \

4242 return sysfs_emit(buf, format"\n", session->field); \

4243 }

4244

4245 #define iscsi_priv_session_attr_store(field) \

4246 static ssize_t \

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

4248 struct device_attribute *attr, \

4249 const char *buf, size_t count) \

4250 { \

4251 int val; \

4252 char *cp; \

4253 struct iscsi_cls_session *session = \

4254 iscsi_dev_to_session(dev->parent); \

4255 if ((session->state == ISCSI_SESSION_FREE) || \

4256 (session->state == ISCSI_SESSION_FAILED)) \

4257 return -EBUSY; \

4258 if (strncmp(buf, "off", 3) == 0) { \

4259 session->field = -1; \

4260 session->field##_sysfs_override = true; \

4261 } else { \

4262 val = simple_strtoul(buf, &cp, 0); \

4263 if (*cp != '\0' && *cp != '\n') \

4264 return -EINVAL; \

4265 session->field = val; \

4266 session->field##_sysfs_override = true; \

4267 } \

4268 return count; \

4269 }

4270

4271 #define iscsi_priv_session_rw_attr(field, format) \

4272 iscsi_priv_session_attr_show(field, format) \

4273 iscsi_priv_session_attr_store(field) \

4274 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \

4275 show_priv_session_##field, \

4276 store_priv_session_##field)

4277

4278 iscsi_priv_session_rw_attr(recovery_tmo, "%d");

4279

4280 static struct attribute *iscsi_session_attrs[] = {

4281 &dev_attr_sess_initial_r2t.attr,

4282 &dev_attr_sess_max_outstanding_r2t.attr,

4283 &dev_attr_sess_immediate_data.attr,

4284 &dev_attr_sess_first_burst_len.attr,

4285 &dev_attr_sess_max_burst_len.attr,

4286 &dev_attr_sess_data_pdu_in_order.attr,

4287 &dev_attr_sess_data_seq_in_order.attr,

4288 &dev_attr_sess_erl.attr,

4289 &dev_attr_sess_targetname.attr,

4290 &dev_attr_sess_tpgt.attr,

4291 &dev_attr_sess_password.attr,

4292 &dev_attr_sess_password_in.attr,

4293 &dev_attr_sess_username.attr,

4294 &dev_attr_sess_username_in.attr,

4295 &dev_attr_sess_fast_abort.attr,

4296 &dev_attr_sess_abort_tmo.attr,

4297 &dev_attr_sess_lu_reset_tmo.attr,

4298 &dev_attr_sess_tgt_reset_tmo.attr,

4299 &dev_attr_sess_ifacename.attr,

4300 &dev_attr_sess_initiatorname.attr,

4301 &dev_attr_sess_targetalias.attr,

4302 &dev_attr_sess_boot_root.attr,

4303 &dev_attr_sess_boot_nic.attr,

4304 &dev_attr_sess_boot_target.attr,

4305 &dev_attr_priv_sess_recovery_tmo.attr,

4306 &dev_attr_priv_sess_state.attr,

4307 &dev_attr_priv_sess_creator.attr,

4308 &dev_attr_sess_chap_out_idx.attr,

4309 &dev_attr_sess_chap_in_idx.attr,

4310 &dev_attr_priv_sess_target_id.attr,

4311 &dev_attr_sess_auto_snd_tgt_disable.attr,

4312 &dev_attr_sess_discovery_session.attr,

4313 &dev_attr_sess_portal_type.attr,

4314 &dev_attr_sess_chap_auth.attr,

4315 &dev_attr_sess_discovery_logout.attr,

4316 &dev_attr_sess_bidi_chap.attr,

4317 &dev_attr_sess_discovery_auth_optional.attr,

4318 &dev_attr_sess_def_time2wait.attr,

4319 &dev_attr_sess_def_time2retain.attr,

4320 &dev_attr_sess_isid.attr,

4321 &dev_attr_sess_tsid.attr,

4322 &dev_attr_sess_def_taskmgmt_tmo.attr,

4323 &dev_attr_sess_discovery_parent_idx.attr,

4324 &dev_attr_sess_discovery_parent_type.attr,

4325 NULL,

4326 };

4327

4328 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,

4329 struct attribute *attr, int i)

4330 {

4331 struct device *cdev = container_of(kobj, struct device, kobj);

4332 struct iscsi_cls_session *session = transport_class_to_session(cdev);

4333 struct iscsi_transport *t = session->transport;

4334 int param;

4335

4336 if (attr == &dev_attr_sess_initial_r2t.attr)

4337 param = ISCSI_PARAM_INITIAL_R2T_EN;

4338 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)

4339 param = ISCSI_PARAM_MAX_R2T;

4340 else if (attr == &dev_attr_sess_immediate_data.attr)

4341 param = ISCSI_PARAM_IMM_DATA_EN;

4342 else if (attr == &dev_attr_sess_first_burst_len.attr)

4343 param = ISCSI_PARAM_FIRST_BURST;

4344 else if (attr == &dev_attr_sess_max_burst_len.attr)

4345 param = ISCSI_PARAM_MAX_BURST;

4346 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)

4347 param = ISCSI_PARAM_PDU_INORDER_EN;

4348 else if (attr == &dev_attr_sess_data_seq_in_order.attr)

4349 param = ISCSI_PARAM_DATASEQ_INORDER_EN;

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

4351 param = ISCSI_PARAM_ERL;

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

4353 param = ISCSI_PARAM_TARGET_NAME;

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

4355 param = ISCSI_PARAM_TPGT;

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

4357 param = ISCSI_PARAM_CHAP_IN_IDX;

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

4359 param = ISCSI_PARAM_CHAP_OUT_IDX;

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

4361 param = ISCSI_PARAM_USERNAME;

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

4363 param = ISCSI_PARAM_USERNAME_IN;

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

4365 param = ISCSI_PARAM_PASSWORD;

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

4367 param = ISCSI_PARAM_PASSWORD_IN;

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

4369 param = ISCSI_PARAM_FAST_ABORT;

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

4371 param = ISCSI_PARAM_ABORT_TMO;

4372 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)

4373 param = ISCSI_PARAM_LU_RESET_TMO;

4374 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)

4375 param = ISCSI_PARAM_TGT_RESET_TMO;

4376 else if (attr == &dev_attr_sess_ifacename.attr)

4377 param = ISCSI_PARAM_IFACE_NAME;

4378 else if (attr == &dev_attr_sess_initiatorname.attr)

4379 param = ISCSI_PARAM_INITIATOR_NAME;

4380 else if (attr == &dev_attr_sess_targetalias.attr)

4381 param = ISCSI_PARAM_TARGET_ALIAS;

4382 else if (attr == &dev_attr_sess_boot_root.attr)

4383 param = ISCSI_PARAM_BOOT_ROOT;

4384 else if (attr == &dev_attr_sess_boot_nic.attr)

4385 param = ISCSI_PARAM_BOOT_NIC;

4386 else if (attr == &dev_attr_sess_boot_target.attr)

4387 param = ISCSI_PARAM_BOOT_TARGET;

4388 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)

4389 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;

4390 else if (attr == &dev_attr_sess_discovery_session.attr)

4391 param = ISCSI_PARAM_DISCOVERY_SESS;

4392 else if (attr == &dev_attr_sess_portal_type.attr)

4393 param = ISCSI_PARAM_PORTAL_TYPE;

4394 else if (attr == &dev_attr_sess_chap_auth.attr)

4395 param = ISCSI_PARAM_CHAP_AUTH_EN;

4396 else if (attr == &dev_attr_sess_discovery_logout.attr)

4397 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;

4398 else if (attr == &dev_attr_sess_bidi_chap.attr)

4399 param = ISCSI_PARAM_BIDI_CHAP_EN;

4400 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)

4401 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;

4402 else if (attr == &dev_attr_sess_def_time2wait.attr)

4403 param = ISCSI_PARAM_DEF_TIME2WAIT;

4404 else if (attr == &dev_attr_sess_def_time2retain.attr)

4405 param = ISCSI_PARAM_DEF_TIME2RETAIN;

4406 else if (attr == &dev_attr_sess_isid.attr)

4407 param = ISCSI_PARAM_ISID;

4408 else if (attr == &dev_attr_sess_tsid.attr)

4409 param = ISCSI_PARAM_TSID;

4410 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)

4411 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;

4412 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)

4413 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;

4414 else if (attr == &dev_attr_sess_discovery_parent_type.attr)

4415 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;

4416 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)

4417 return S_IRUGO | S_IWUSR;

4418 else if (attr == &dev_attr_priv_sess_state.attr)

4419 return S_IRUGO;

4420 else if (attr == &dev_attr_priv_sess_creator.attr)

4421 return S_IRUGO;

4422 else if (attr == &dev_attr_priv_sess_target_id.attr)

4423 return S_IRUGO;

4424 else {

4425 WARN_ONCE(1, "Invalid session attr");

4426 return 0;

4427 }

4428

4429 return t->attr_is_visible(ISCSI_PARAM, param);

4430 }

4431

4432 static struct attribute_group iscsi_session_group = {

4433 .attrs = iscsi_session_attrs,

4434 .is_visible = iscsi_session_attr_is_visible,

4435 };

4436

4437 /*

4438 * iSCSI host attrs

4439 */

4440 #define iscsi_host_attr_show(param) \

4441 static ssize_t \

4442 show_host_param_##param(struct device *dev, \

4443 struct device_attribute *attr, char *buf) \

4444 { \

4445 struct Scsi_Host *shost = transport_class_to_shost(dev); \

4446 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \

4447 return priv->iscsi_transport->get_host_param(shost, param, buf); \

4448 }

4449

4450 #define iscsi_host_attr(field, param) \

4451 iscsi_host_attr_show(param) \

4452 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \

4453 NULL);

4454

4455 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);

4456 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);

4457 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);

4458 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);

4459 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);

4460 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);

4461

4462 static struct attribute *iscsi_host_attrs[] = {

4463 &dev_attr_host_netdev.attr,

4464 &dev_attr_host_hwaddress.attr,

4465 &dev_attr_host_ipaddress.attr,

4466 &dev_attr_host_initiatorname.attr,

4467 &dev_attr_host_port_state.attr,

4468 &dev_attr_host_port_speed.attr,

4469 NULL,

4470 };

4471

4472 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,

4473 struct attribute *attr, int i)

4474 {

4475 struct device *cdev = container_of(kobj, struct device, kobj);

4476 struct Scsi_Host *shost = transport_class_to_shost(cdev);

4477 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);

4478 int param;

4479

4480 if (attr == &dev_attr_host_netdev.attr)

4481 param = ISCSI_HOST_PARAM_NETDEV_NAME;

4482 else if (attr == &dev_attr_host_hwaddress.attr)

4483 param = ISCSI_HOST_PARAM_HWADDRESS;

4484 else if (attr == &dev_attr_host_ipaddress.attr)

4485 param = ISCSI_HOST_PARAM_IPADDRESS;

4486 else if (attr == &dev_attr_host_initiatorname.attr)

4487 param = ISCSI_HOST_PARAM_INITIATOR_NAME;

4488 else if (attr == &dev_attr_host_port_state.attr)

4489 param = ISCSI_HOST_PARAM_PORT_STATE;

4490 else if (attr == &dev_attr_host_port_speed.attr)

4491 param = ISCSI_HOST_PARAM_PORT_SPEED;

4492 else {

4493 WARN_ONCE(1, "Invalid host attr");

4494 return 0;

4495 }

4496

4497 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);

4498 }

4499

4500 static struct attribute_group iscsi_host_group = {

4501 .attrs = iscsi_host_attrs,

4502 .is_visible = iscsi_host_attr_is_visible,

4503 };

4504

4505 /* convert iscsi_port_speed values to ascii string name */

4506 static const struct {

4507 enum iscsi_port_speed value;

4508 char *name;

4509 } iscsi_port_speed_names[] = {

4510 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },

4511 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },

4512 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },

4513 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },

4514 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },

4515 {ISCSI_PORT_SPEED_25GBPS, "25 Gbps" },

4516 {ISCSI_PORT_SPEED_40GBPS, "40 Gbps" },

4517 };

4518

4519 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)

4520 {

4521 int i;

4522 char *speed = "Unknown!";

4523 struct iscsi_cls_host *ihost = shost->shost_data;

4524 uint32_t port_speed = ihost->port_speed;

4525

4526 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {

4527 if (iscsi_port_speed_names[i].value & port_speed) {

4528 speed = iscsi_port_speed_names[i].name;

4529 break;

4530 }

4531 }

4532 return speed;

4533 }

4534 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);

4535

4536 /* convert iscsi_port_state values to ascii string name */

4537 static const struct {

4538 enum iscsi_port_state value;

4539 char *name;

4540 } iscsi_port_state_names[] = {

4541 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },

4542 {ISCSI_PORT_STATE_UP, "LINK UP" },

4543 };

4544

4545 char *iscsi_get_port_state_name(struct Scsi_Host *shost)

4546 {

4547 int i;

4548 char *state = "Unknown!";

4549 struct iscsi_cls_host *ihost = shost->shost_data;

4550 uint32_t port_state = ihost->port_state;

4551

4552 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {

4553 if (iscsi_port_state_names[i].value & port_state) {

4554 state = iscsi_port_state_names[i].name;

4555 break;

4556 }

4557 }

4558 return state;

4559 }

4560 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);

4561

4562 static int iscsi_session_match(struct attribute_container *cont,

4563 struct device *dev)

4564 {

4565 struct iscsi_cls_session *session;

4566 struct Scsi_Host *shost;

4567 struct iscsi_internal *priv;

4568

4569 if (!iscsi_is_session_dev(dev))

4570 return 0;

4571

4572 session = iscsi_dev_to_session(dev);

4573 shost = iscsi_session_to_shost(session);

4574 if (!shost->transportt)

4575 return 0;

4576

4577 priv = to_iscsi_internal(shost->transportt);

4578 if (priv->session_cont.ac.class != &iscsi_session_class.class)

4579 return 0;

4580

4581 return &priv->session_cont.ac == cont;

4582 }

4583

4584 static int iscsi_conn_match(struct attribute_container *cont,

4585 struct device *dev)

4586 {

4587 struct iscsi_cls_session *session;

4588 struct iscsi_cls_conn *conn;

4589 struct Scsi_Host *shost;

4590 struct iscsi_internal *priv;

4591

4592 if (!iscsi_is_conn_dev(dev))

4593 return 0;

4594

4595 conn = iscsi_dev_to_conn(dev);

4596 session = iscsi_dev_to_session(conn->dev.parent);

4597 shost = iscsi_session_to_shost(session);

4598

4599 if (!shost->transportt)

4600 return 0;

4601

4602 priv = to_iscsi_internal(shost->transportt);

4603 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)

4604 return 0;

4605

4606 return &priv->conn_cont.ac == cont;

4607 }

4608

4609 static int iscsi_host_match(struct attribute_container *cont,

4610 struct device *dev)

4611 {

4612 struct Scsi_Host *shost;

4613 struct iscsi_internal *priv;

4614

4615 if (!scsi_is_host_device(dev))

4616 return 0;

4617

4618 shost = dev_to_shost(dev);

4619 if (!shost->transportt ||

4620 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)

4621 return 0;

4622

4623 priv = to_iscsi_internal(shost->transportt);

4624 return &priv->t.host_attrs.ac == cont;

4625 }

4626

4627 struct scsi_transport_template *

4628 iscsi_register_transport(struct iscsi_transport *tt)

4629 {

4630 struct iscsi_internal *priv;

4631 unsigned long flags;

4632 int err;

4633

4634 BUG_ON(!tt);

4635

4636 priv = iscsi_if_transport_lookup(tt);

4637 if (priv)

4638 return NULL;

4639

4640 priv = kzalloc(sizeof(*priv), GFP_KERNEL);

4641 if (!priv)

4642 return NULL;

4643 INIT_LIST_HEAD(&priv->list);

4644 priv->iscsi_transport = tt;

4645 priv->t.user_scan = iscsi_user_scan;

4646 priv->t.create_work_queue = 1;

4647

4648 priv->dev.class = &iscsi_transport_class;

4649 dev_set_name(&priv->dev, "%s", tt->name);

4650 err = device_register(&priv->dev);

4651 if (err)

4652 goto free_priv;

4653

4654 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);

4655 if (err)

4656 goto unregister_dev;

4657

4658 /* host parameters */

4659 priv->t.host_attrs.ac.class = &iscsi_host_class.class;

4660 priv->t.host_attrs.ac.match = iscsi_host_match;

4661 priv->t.host_attrs.ac.grp = &iscsi_host_group;

4662 priv->t.host_size = sizeof(struct iscsi_cls_host);

4663 transport_container_register(&priv->t.host_attrs);

4664

4665 /* connection parameters */

4666 priv->conn_cont.ac.class = &iscsi_connection_class.class;

4667 priv->conn_cont.ac.match = iscsi_conn_match;

4668 priv->conn_cont.ac.grp = &iscsi_conn_group;

4669 transport_container_register(&priv->conn_cont);

4670

4671 /* session parameters */

4672 priv->session_cont.ac.class = &iscsi_session_class.class;

4673 priv->session_cont.ac.match = iscsi_session_match;

4674 priv->session_cont.ac.grp = &iscsi_session_group;

4675 transport_container_register(&priv->session_cont);

4676

4677 spin_lock_irqsave(&iscsi_transport_lock, flags);

4678 list_add(&priv->list, &iscsi_transports);

4679 spin_unlock_irqrestore(&iscsi_transport_lock, flags);

4680

4681 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);

4682 return &priv->t;

4683

4684 unregister_dev:

4685 device_unregister(&priv->dev);

4686 return NULL;

4687 free_priv:

4688 kfree(priv);

4689 return NULL;

4690 }

4691 EXPORT_SYMBOL_GPL(iscsi_register_transport);

4692

4693 int iscsi_unregister_transport(struct iscsi_transport *tt)

4694 {

4695 struct iscsi_internal *priv;

4696 unsigned long flags;

4697

4698 BUG_ON(!tt);

4699

4700 mutex_lock(&rx_queue_mutex);

4701

4702 priv = iscsi_if_transport_lookup(tt);

4703 BUG_ON (!priv);

4704

4705 spin_lock_irqsave(&iscsi_transport_lock, flags);

4706 list_del(&priv->list);

4707 spin_unlock_irqrestore(&iscsi_transport_lock, flags);

4708

4709 transport_container_unregister(&priv->conn_cont);

4710 transport_container_unregister(&priv->session_cont);

4711 transport_container_unregister(&priv->t.host_attrs);

4712

4713 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);

4714 device_unregister(&priv->dev);

4715 mutex_unlock(&rx_queue_mutex);

4716

4717 return 0;

4718 }

4719 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);

4720

4721 void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *),

4722 struct device *dev, const char *fmt, ...)

4723 {

4724 struct va_format vaf;

4725 va_list args;

4726

4727 va_start(args, fmt);

4728 vaf.fmt = fmt;

4729 vaf.va = &args;

4730 trace(dev, &vaf);

4731 va_end(args);

4732 }

4733 EXPORT_SYMBOL_GPL(iscsi_dbg_trace);

4734

4735 static __init int iscsi_transport_init(void)

4736 {

4737 int err;

4738 struct netlink_kernel_cfg cfg = {

4739 .groups = 1,

4740 .input = iscsi_if_rx,

4741 };

4742 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",

4743 ISCSI_TRANSPORT_VERSION);

4744

4745 atomic_set(&iscsi_session_nr, 0);

4746

4747 err = class_register(&iscsi_transport_class);

4748 if (err)

4749 return err;

4750

4751 err = class_register(&iscsi_endpoint_class);

4752 if (err)

4753 goto unregister_transport_class;

4754

4755 err = class_register(&iscsi_iface_class);

4756 if (err)

4757 goto unregister_endpoint_class;

4758

4759 err = transport_class_register(&iscsi_host_class);

4760 if (err)

4761 goto unregister_iface_class;

4762

4763 err = transport_class_register(&iscsi_connection_class);

4764 if (err)

4765 goto unregister_host_class;

4766

4767 err = transport_class_register(&iscsi_session_class);

4768 if (err)

4769 goto unregister_conn_class;

4770

4771 err = bus_register(&iscsi_flashnode_bus);

4772 if (err)

4773 goto unregister_session_class;

4774

4775 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);

4776 if (!nls) {

4777 err = -ENOBUFS;

4778 goto unregister_flashnode_bus;

4779 }

4780

4781 iscsi_eh_timer_workq = alloc_workqueue("%s",

4782 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,

4783 1, "iscsi_eh");

4784 if (!iscsi_eh_timer_workq) {

4785 err = -ENOMEM;

4786 goto release_nls;

4787 }

4788

4789 iscsi_destroy_workq = alloc_workqueue("%s",

4790 WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,

4791 1, "iscsi_destroy");

4792 if (!iscsi_destroy_workq) {

4793 err = -ENOMEM;

4794 goto destroy_wq;

4795 }

4796

4797 return 0;

4798

4799 destroy_wq:

4800 destroy_workqueue(iscsi_eh_timer_workq);

4801 release_nls:

4802 netlink_kernel_release(nls);

4803 unregister_flashnode_bus:

4804 bus_unregister(&iscsi_flashnode_bus);

4805 unregister_session_class:

4806 transport_class_unregister(&iscsi_session_class);

4807 unregister_conn_class:

4808 transport_class_unregister(&iscsi_connection_class);

4809 unregister_host_class:

4810 transport_class_unregister(&iscsi_host_class);

4811 unregister_iface_class:

4812 class_unregister(&iscsi_iface_class);

4813 unregister_endpoint_class:

4814 class_unregister(&iscsi_endpoint_class);

4815 unregister_transport_class:

4816 class_unregister(&iscsi_transport_class);

4817 return err;

4818 }

4819

4820 static void __exit iscsi_transport_exit(void)

4821 {

4822 destroy_workqueue(iscsi_destroy_workq);

4823 destroy_workqueue(iscsi_eh_timer_workq);

4824 netlink_kernel_release(nls);

4825 bus_unregister(&iscsi_flashnode_bus);

4826 transport_class_unregister(&iscsi_connection_class);

4827 transport_class_unregister(&iscsi_session_class);

4828 transport_class_unregister(&iscsi_host_class);

4829 class_unregister(&iscsi_endpoint_class);

4830 class_unregister(&iscsi_iface_class);

4831 class_unregister(&iscsi_transport_class);

4832 }

4833

4834 module_init(iscsi_transport_init);

4835 module_exit(iscsi_transport_exit);

4836

4837 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "

4838 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "

4839 "Alex Aizman <itn780@yahoo.com>");

4840 MODULE_DESCRIPTION("iSCSI Transport Interface");

4841 MODULE_LICENSE("GPL");

4842 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);

4843 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);