Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * linux/drivers/s390/scsi/zfcp_erp.c |
| 4 | * |
| 5 | * FCP adapter driver for IBM eServer zSeries |
| 6 | * |
| 7 | * (C) Copyright IBM Corp. 2002, 2004 |
| 8 | * |
| 9 | * Author(s): Martin Peschke <mpeschke@de.ibm.com> |
| 10 | * Raimund Schroeder <raimund.schroeder@de.ibm.com> |
| 11 | * Aron Zeh |
| 12 | * Wolfgang Taphorn |
| 13 | * Stefan Bader <stefan.bader@de.ibm.com> |
| 14 | * Heiko Carstens <heiko.carstens@de.ibm.com> |
| 15 | * Andreas Herrmann <aherrman@de.ibm.com> |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or modify |
| 18 | * it under the terms of the GNU General Public License as published by |
| 19 | * the Free Software Foundation; either version 2, or (at your option) |
| 20 | * any later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, |
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 25 | * GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License |
| 28 | * along with this program; if not, write to the Free Software |
| 29 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 30 | */ |
| 31 | |
| 32 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_ERP |
| 33 | |
| 34 | #define ZFCP_ERP_REVISION "$Revision: 1.86 $" |
| 35 | |
| 36 | #include "zfcp_ext.h" |
| 37 | |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 38 | static int zfcp_erp_adisc(struct zfcp_port *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | static void zfcp_erp_adisc_handler(unsigned long); |
| 40 | |
| 41 | static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int); |
| 42 | static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *, int); |
| 43 | static int zfcp_erp_port_reopen_internal(struct zfcp_port *, int); |
| 44 | static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *, int); |
| 45 | |
| 46 | static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *, int); |
| 47 | static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *, int); |
| 48 | |
| 49 | static void zfcp_erp_adapter_block(struct zfcp_adapter *, int); |
| 50 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *); |
| 51 | static void zfcp_erp_port_block(struct zfcp_port *, int); |
| 52 | static void zfcp_erp_port_unblock(struct zfcp_port *); |
| 53 | static void zfcp_erp_unit_block(struct zfcp_unit *, int); |
| 54 | static void zfcp_erp_unit_unblock(struct zfcp_unit *); |
| 55 | |
| 56 | static int zfcp_erp_thread(void *); |
| 57 | |
| 58 | static int zfcp_erp_strategy(struct zfcp_erp_action *); |
| 59 | |
| 60 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *); |
| 61 | static int zfcp_erp_strategy_memwait(struct zfcp_erp_action *); |
| 62 | static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *, int); |
| 63 | static int zfcp_erp_strategy_check_unit(struct zfcp_unit *, int); |
| 64 | static int zfcp_erp_strategy_check_port(struct zfcp_port *, int); |
| 65 | static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *, int); |
| 66 | static int zfcp_erp_strategy_statechange(int, u32, struct zfcp_adapter *, |
| 67 | struct zfcp_port *, |
| 68 | struct zfcp_unit *, int); |
| 69 | static inline int zfcp_erp_strategy_statechange_detected(atomic_t *, u32); |
| 70 | static int zfcp_erp_strategy_followup_actions(int, struct zfcp_adapter *, |
| 71 | struct zfcp_port *, |
| 72 | struct zfcp_unit *, int); |
| 73 | static int zfcp_erp_strategy_check_queues(struct zfcp_adapter *); |
| 74 | static int zfcp_erp_strategy_check_action(struct zfcp_erp_action *, int); |
| 75 | |
| 76 | static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *); |
| 77 | static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int); |
| 78 | static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *); |
| 79 | static int zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *); |
| 80 | static int zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *); |
| 81 | static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *); |
| 82 | static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *); |
| 83 | static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *); |
| 84 | static int zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *); |
| 85 | static int zfcp_erp_adapter_strategy_open_fsf_statusread( |
| 86 | struct zfcp_erp_action *); |
| 87 | |
| 88 | static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *); |
| 89 | static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *); |
| 90 | |
| 91 | static int zfcp_erp_port_strategy(struct zfcp_erp_action *); |
| 92 | static int zfcp_erp_port_strategy_clearstati(struct zfcp_port *); |
| 93 | static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *); |
| 94 | static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *); |
| 95 | static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *); |
| 96 | static int zfcp_erp_port_strategy_open_nameserver_wakeup( |
| 97 | struct zfcp_erp_action *); |
| 98 | static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *); |
| 99 | static int zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *); |
| 100 | static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *); |
| 101 | |
| 102 | static int zfcp_erp_unit_strategy(struct zfcp_erp_action *); |
| 103 | static int zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *); |
| 104 | static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *); |
| 105 | static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *); |
| 106 | |
| 107 | static int zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *); |
| 108 | static int zfcp_erp_action_dismiss_port(struct zfcp_port *); |
| 109 | static int zfcp_erp_action_dismiss_unit(struct zfcp_unit *); |
| 110 | static int zfcp_erp_action_dismiss(struct zfcp_erp_action *); |
| 111 | |
| 112 | static int zfcp_erp_action_enqueue(int, struct zfcp_adapter *, |
| 113 | struct zfcp_port *, struct zfcp_unit *); |
| 114 | static int zfcp_erp_action_dequeue(struct zfcp_erp_action *); |
| 115 | static void zfcp_erp_action_cleanup(int, struct zfcp_adapter *, |
| 116 | struct zfcp_port *, struct zfcp_unit *, |
| 117 | int); |
| 118 | |
| 119 | static void zfcp_erp_action_ready(struct zfcp_erp_action *); |
| 120 | static int zfcp_erp_action_exists(struct zfcp_erp_action *); |
| 121 | |
| 122 | static inline void zfcp_erp_action_to_ready(struct zfcp_erp_action *); |
| 123 | static inline void zfcp_erp_action_to_running(struct zfcp_erp_action *); |
| 124 | |
| 125 | static void zfcp_erp_memwait_handler(unsigned long); |
| 126 | static void zfcp_erp_timeout_handler(unsigned long); |
| 127 | static inline void zfcp_erp_timeout_init(struct zfcp_erp_action *); |
| 128 | |
| 129 | /** |
| 130 | * zfcp_fsf_request_timeout_handler - called if a request timed out |
| 131 | * @data: pointer to adapter for handler function |
| 132 | * |
| 133 | * This function needs to be called if requests (ELS, Generic Service, |
| 134 | * or SCSI commands) exceed a certain time limit. The assumption is |
| 135 | * that after the time limit the adapter get stuck. So we trigger a reopen of |
| 136 | * the adapter. This should not be used for error recovery, SCSI abort |
| 137 | * commands and SCSI requests from SCSI mid-layer. |
| 138 | */ |
| 139 | void |
| 140 | zfcp_fsf_request_timeout_handler(unsigned long data) |
| 141 | { |
| 142 | struct zfcp_adapter *adapter; |
| 143 | |
| 144 | adapter = (struct zfcp_adapter *) data; |
| 145 | |
| 146 | zfcp_erp_adapter_reopen(adapter, 0); |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * function: zfcp_fsf_scsi_er_timeout_handler |
| 151 | * |
| 152 | * purpose: This function needs to be called whenever a SCSI error recovery |
| 153 | * action (abort/reset) does not return. |
| 154 | * Re-opening the adapter means that the command can be returned |
| 155 | * by zfcp (it is guarranteed that it does not return via the |
| 156 | * adapter anymore). The buffer can then be used again. |
| 157 | * |
| 158 | * returns: sod all |
| 159 | */ |
| 160 | void |
| 161 | zfcp_fsf_scsi_er_timeout_handler(unsigned long data) |
| 162 | { |
| 163 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
| 164 | |
| 165 | ZFCP_LOG_NORMAL("warning: SCSI error recovery timed out. " |
| 166 | "Restarting all operations on the adapter %s\n", |
| 167 | zfcp_get_busid_by_adapter(adapter)); |
| 168 | debug_text_event(adapter->erp_dbf, 1, "eh_lmem_tout"); |
| 169 | zfcp_erp_adapter_reopen(adapter, 0); |
| 170 | |
| 171 | return; |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | * function: |
| 176 | * |
| 177 | * purpose: called if an adapter failed, |
| 178 | * initiates adapter recovery which is done |
| 179 | * asynchronously |
| 180 | * |
| 181 | * returns: 0 - initiated action succesfully |
| 182 | * <0 - failed to initiate action |
| 183 | */ |
| 184 | int |
| 185 | zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *adapter, int clear_mask) |
| 186 | { |
| 187 | int retval; |
| 188 | |
| 189 | debug_text_event(adapter->erp_dbf, 5, "a_ro"); |
| 190 | ZFCP_LOG_DEBUG("reopen adapter %s\n", |
| 191 | zfcp_get_busid_by_adapter(adapter)); |
| 192 | |
| 193 | zfcp_erp_adapter_block(adapter, clear_mask); |
| 194 | |
| 195 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { |
| 196 | ZFCP_LOG_DEBUG("skipped reopen of failed adapter %s\n", |
| 197 | zfcp_get_busid_by_adapter(adapter)); |
| 198 | debug_text_event(adapter->erp_dbf, 5, "a_ro_f"); |
| 199 | /* ensure propagation of failed status to new devices */ |
| 200 | zfcp_erp_adapter_failed(adapter); |
| 201 | retval = -EIO; |
| 202 | goto out; |
| 203 | } |
| 204 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, |
| 205 | adapter, NULL, NULL); |
| 206 | |
| 207 | out: |
| 208 | return retval; |
| 209 | } |
| 210 | |
| 211 | /* |
| 212 | * function: |
| 213 | * |
| 214 | * purpose: Wrappper for zfcp_erp_adapter_reopen_internal |
| 215 | * used to ensure the correct locking |
| 216 | * |
| 217 | * returns: 0 - initiated action succesfully |
| 218 | * <0 - failed to initiate action |
| 219 | */ |
| 220 | int |
| 221 | zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear_mask) |
| 222 | { |
| 223 | int retval; |
| 224 | unsigned long flags; |
| 225 | |
| 226 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 227 | write_lock(&adapter->erp_lock); |
| 228 | retval = zfcp_erp_adapter_reopen_internal(adapter, clear_mask); |
| 229 | write_unlock(&adapter->erp_lock); |
| 230 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 231 | |
| 232 | return retval; |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * function: |
| 237 | * |
| 238 | * purpose: |
| 239 | * |
| 240 | * returns: |
| 241 | */ |
| 242 | int |
| 243 | zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear_mask) |
| 244 | { |
| 245 | int retval; |
| 246 | |
| 247 | retval = zfcp_erp_adapter_reopen(adapter, |
| 248 | ZFCP_STATUS_COMMON_RUNNING | |
| 249 | ZFCP_STATUS_COMMON_ERP_FAILED | |
| 250 | clear_mask); |
| 251 | |
| 252 | return retval; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * function: |
| 257 | * |
| 258 | * purpose: |
| 259 | * |
| 260 | * returns: |
| 261 | */ |
| 262 | int |
| 263 | zfcp_erp_port_shutdown(struct zfcp_port *port, int clear_mask) |
| 264 | { |
| 265 | int retval; |
| 266 | |
| 267 | retval = zfcp_erp_port_reopen(port, |
| 268 | ZFCP_STATUS_COMMON_RUNNING | |
| 269 | ZFCP_STATUS_COMMON_ERP_FAILED | |
| 270 | clear_mask); |
| 271 | |
| 272 | return retval; |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * function: |
| 277 | * |
| 278 | * purpose: |
| 279 | * |
| 280 | * returns: |
| 281 | */ |
| 282 | int |
| 283 | zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear_mask) |
| 284 | { |
| 285 | int retval; |
| 286 | |
| 287 | retval = zfcp_erp_unit_reopen(unit, |
| 288 | ZFCP_STATUS_COMMON_RUNNING | |
| 289 | ZFCP_STATUS_COMMON_ERP_FAILED | |
| 290 | clear_mask); |
| 291 | |
| 292 | return retval; |
| 293 | } |
| 294 | |
| 295 | |
| 296 | /** |
| 297 | * zfcp_erp_adisc - send ADISC ELS command |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 298 | * @port: port structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | */ |
| 300 | int |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 301 | zfcp_erp_adisc(struct zfcp_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 303 | struct zfcp_adapter *adapter = port->adapter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | struct zfcp_send_els *send_els; |
| 305 | struct zfcp_ls_adisc *adisc; |
| 306 | void *address = NULL; |
| 307 | int retval = 0; |
| 308 | struct timer_list *timer; |
| 309 | |
| 310 | send_els = kmalloc(sizeof(struct zfcp_send_els), GFP_ATOMIC); |
| 311 | if (send_els == NULL) |
| 312 | goto nomem; |
| 313 | memset(send_els, 0, sizeof(*send_els)); |
| 314 | |
| 315 | send_els->req = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); |
| 316 | if (send_els->req == NULL) |
| 317 | goto nomem; |
| 318 | memset(send_els->req, 0, sizeof(*send_els->req)); |
| 319 | |
| 320 | send_els->resp = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); |
| 321 | if (send_els->resp == NULL) |
| 322 | goto nomem; |
| 323 | memset(send_els->resp, 0, sizeof(*send_els->resp)); |
| 324 | |
| 325 | address = (void *) get_zeroed_page(GFP_ATOMIC); |
| 326 | if (address == NULL) |
| 327 | goto nomem; |
| 328 | |
| 329 | zfcp_address_to_sg(address, send_els->req); |
| 330 | address += PAGE_SIZE >> 1; |
| 331 | zfcp_address_to_sg(address, send_els->resp); |
| 332 | send_els->req_count = send_els->resp_count = 1; |
| 333 | |
| 334 | send_els->adapter = adapter; |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 335 | send_els->port = port; |
| 336 | send_els->d_id = port->d_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | send_els->handler = zfcp_erp_adisc_handler; |
| 338 | send_els->handler_data = (unsigned long) send_els; |
| 339 | |
| 340 | adisc = zfcp_sg_to_address(send_els->req); |
| 341 | send_els->ls_code = adisc->code = ZFCP_LS_ADISC; |
| 342 | |
| 343 | send_els->req->length = sizeof(struct zfcp_ls_adisc); |
| 344 | send_els->resp->length = sizeof(struct zfcp_ls_adisc_acc); |
| 345 | |
| 346 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports |
| 347 | without FC-AL-2 capability, so we don't set it */ |
| 348 | adisc->wwpn = adapter->wwpn; |
| 349 | adisc->wwnn = adapter->wwnn; |
| 350 | adisc->nport_id = adapter->s_id; |
| 351 | ZFCP_LOG_INFO("ADISC request from s_id 0x%08x to d_id 0x%08x " |
| 352 | "(wwpn=0x%016Lx, wwnn=0x%016Lx, " |
| 353 | "hard_nport_id=0x%08x, nport_id=0x%08x)\n", |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 354 | adapter->s_id, send_els->d_id, (wwn_t) adisc->wwpn, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | (wwn_t) adisc->wwnn, adisc->hard_nport_id, |
| 356 | adisc->nport_id); |
| 357 | |
| 358 | timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC); |
| 359 | if (!timer) |
| 360 | goto nomem; |
| 361 | |
| 362 | init_timer(timer); |
| 363 | timer->function = zfcp_fsf_request_timeout_handler; |
| 364 | timer->data = (unsigned long) adapter; |
| 365 | timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; |
| 366 | send_els->timer = timer; |
| 367 | |
| 368 | retval = zfcp_fsf_send_els(send_els); |
| 369 | if (retval != 0) { |
| 370 | ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port " |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 371 | "0x%08x on adapter %s\n", send_els->d_id, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | zfcp_get_busid_by_adapter(adapter)); |
| 373 | del_timer(send_els->timer); |
| 374 | goto freemem; |
| 375 | } |
| 376 | |
| 377 | goto out; |
| 378 | |
| 379 | nomem: |
| 380 | retval = -ENOMEM; |
| 381 | freemem: |
| 382 | if (address != NULL) |
| 383 | __free_pages(send_els->req->page, 0); |
| 384 | if (send_els != NULL) { |
| 385 | kfree(send_els->timer); |
| 386 | kfree(send_els->req); |
| 387 | kfree(send_els->resp); |
| 388 | kfree(send_els); |
| 389 | } |
| 390 | out: |
| 391 | return retval; |
| 392 | } |
| 393 | |
| 394 | |
| 395 | /** |
| 396 | * zfcp_erp_adisc_handler - handler for ADISC ELS command |
| 397 | * @data: pointer to struct zfcp_send_els |
| 398 | * |
| 399 | * If ADISC failed (LS_RJT or timed out) forced reopen of the port is triggered. |
| 400 | */ |
| 401 | void |
| 402 | zfcp_erp_adisc_handler(unsigned long data) |
| 403 | { |
| 404 | struct zfcp_send_els *send_els; |
| 405 | struct zfcp_port *port; |
| 406 | struct zfcp_adapter *adapter; |
| 407 | fc_id_t d_id; |
| 408 | struct zfcp_ls_adisc_acc *adisc; |
| 409 | |
| 410 | send_els = (struct zfcp_send_els *) data; |
| 411 | |
| 412 | del_timer(send_els->timer); |
| 413 | |
| 414 | adapter = send_els->adapter; |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 415 | port = send_els->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | d_id = send_els->d_id; |
| 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | /* request rejected or timed out */ |
| 419 | if (send_els->status != 0) { |
| 420 | ZFCP_LOG_NORMAL("ELS request rejected/timed out, " |
| 421 | "force physical port reopen " |
| 422 | "(adapter %s, port d_id=0x%08x)\n", |
| 423 | zfcp_get_busid_by_adapter(adapter), d_id); |
| 424 | debug_text_event(adapter->erp_dbf, 3, "forcreop"); |
| 425 | if (zfcp_erp_port_forced_reopen(port, 0)) |
| 426 | ZFCP_LOG_NORMAL("failed reopen of port " |
| 427 | "(adapter %s, wwpn=0x%016Lx)\n", |
| 428 | zfcp_get_busid_by_port(port), |
| 429 | port->wwpn); |
| 430 | goto out; |
| 431 | } |
| 432 | |
| 433 | adisc = zfcp_sg_to_address(send_els->resp); |
| 434 | |
| 435 | ZFCP_LOG_INFO("ADISC response from d_id 0x%08x to s_id " |
| 436 | "0x%08x (wwpn=0x%016Lx, wwnn=0x%016Lx, " |
| 437 | "hard_nport_id=0x%08x, nport_id=0x%08x)\n", |
| 438 | d_id, adapter->s_id, (wwn_t) adisc->wwpn, |
| 439 | (wwn_t) adisc->wwnn, adisc->hard_nport_id, |
| 440 | adisc->nport_id); |
| 441 | |
| 442 | /* set wwnn for port */ |
| 443 | if (port->wwnn == 0) |
| 444 | port->wwnn = adisc->wwnn; |
| 445 | |
| 446 | if (port->wwpn != adisc->wwpn) { |
| 447 | ZFCP_LOG_NORMAL("d_id assignment changed, reopening " |
| 448 | "port (adapter %s, wwpn=0x%016Lx, " |
| 449 | "adisc_resp_wwpn=0x%016Lx)\n", |
| 450 | zfcp_get_busid_by_port(port), |
| 451 | port->wwpn, (wwn_t) adisc->wwpn); |
| 452 | if (zfcp_erp_port_reopen(port, 0)) |
| 453 | ZFCP_LOG_NORMAL("failed reopen of port " |
| 454 | "(adapter %s, wwpn=0x%016Lx)\n", |
| 455 | zfcp_get_busid_by_port(port), |
| 456 | port->wwpn); |
| 457 | } |
| 458 | |
| 459 | out: |
| 460 | zfcp_port_put(port); |
| 461 | __free_pages(send_els->req->page, 0); |
| 462 | kfree(send_els->timer); |
| 463 | kfree(send_els->req); |
| 464 | kfree(send_els->resp); |
| 465 | kfree(send_els); |
| 466 | } |
| 467 | |
| 468 | |
| 469 | /** |
| 470 | * zfcp_test_link - lightweight link test procedure |
| 471 | * @port: port to be tested |
| 472 | * |
| 473 | * Test status of a link to a remote port using the ELS command ADISC. |
| 474 | */ |
| 475 | int |
| 476 | zfcp_test_link(struct zfcp_port *port) |
| 477 | { |
| 478 | int retval; |
| 479 | |
| 480 | zfcp_port_get(port); |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 481 | retval = zfcp_erp_adisc(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (retval != 0) { |
| 483 | zfcp_port_put(port); |
| 484 | ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx " |
| 485 | "on adapter %s\n ", port->wwpn, |
| 486 | zfcp_get_busid_by_port(port)); |
| 487 | retval = zfcp_erp_port_forced_reopen(port, 0); |
| 488 | if (retval != 0) { |
| 489 | ZFCP_LOG_NORMAL("reopen of remote port 0x%016Lx " |
| 490 | "on adapter %s failed\n", port->wwpn, |
| 491 | zfcp_get_busid_by_port(port)); |
| 492 | retval = -EPERM; |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | return retval; |
| 497 | } |
| 498 | |
| 499 | |
| 500 | /* |
| 501 | * function: |
| 502 | * |
| 503 | * purpose: called if a port failed to be opened normally |
| 504 | * initiates Forced Reopen recovery which is done |
| 505 | * asynchronously |
| 506 | * |
| 507 | * returns: 0 - initiated action succesfully |
| 508 | * <0 - failed to initiate action |
| 509 | */ |
| 510 | static int |
| 511 | zfcp_erp_port_forced_reopen_internal(struct zfcp_port *port, int clear_mask) |
| 512 | { |
| 513 | int retval; |
| 514 | struct zfcp_adapter *adapter = port->adapter; |
| 515 | |
| 516 | debug_text_event(adapter->erp_dbf, 5, "pf_ro"); |
| 517 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 518 | |
| 519 | ZFCP_LOG_DEBUG("forced reopen of port 0x%016Lx on adapter %s\n", |
| 520 | port->wwpn, zfcp_get_busid_by_port(port)); |
| 521 | |
| 522 | zfcp_erp_port_block(port, clear_mask); |
| 523 | |
| 524 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { |
| 525 | ZFCP_LOG_DEBUG("skipped forced reopen of failed port 0x%016Lx " |
| 526 | "on adapter %s\n", port->wwpn, |
| 527 | zfcp_get_busid_by_port(port)); |
| 528 | debug_text_event(adapter->erp_dbf, 5, "pf_ro_f"); |
| 529 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 530 | retval = -EIO; |
| 531 | goto out; |
| 532 | } |
| 533 | |
| 534 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, |
| 535 | port->adapter, port, NULL); |
| 536 | |
| 537 | out: |
| 538 | return retval; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * function: |
| 543 | * |
| 544 | * purpose: Wrappper for zfcp_erp_port_forced_reopen_internal |
| 545 | * used to ensure the correct locking |
| 546 | * |
| 547 | * returns: 0 - initiated action succesfully |
| 548 | * <0 - failed to initiate action |
| 549 | */ |
| 550 | int |
| 551 | zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear_mask) |
| 552 | { |
| 553 | int retval; |
| 554 | unsigned long flags; |
| 555 | struct zfcp_adapter *adapter; |
| 556 | |
| 557 | adapter = port->adapter; |
| 558 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 559 | write_lock(&adapter->erp_lock); |
| 560 | retval = zfcp_erp_port_forced_reopen_internal(port, clear_mask); |
| 561 | write_unlock(&adapter->erp_lock); |
| 562 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 563 | |
| 564 | return retval; |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * function: |
| 569 | * |
| 570 | * purpose: called if a port is to be opened |
| 571 | * initiates Reopen recovery which is done |
| 572 | * asynchronously |
| 573 | * |
| 574 | * returns: 0 - initiated action succesfully |
| 575 | * <0 - failed to initiate action |
| 576 | */ |
| 577 | static int |
| 578 | zfcp_erp_port_reopen_internal(struct zfcp_port *port, int clear_mask) |
| 579 | { |
| 580 | int retval; |
| 581 | struct zfcp_adapter *adapter = port->adapter; |
| 582 | |
| 583 | debug_text_event(adapter->erp_dbf, 5, "p_ro"); |
| 584 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 585 | |
| 586 | ZFCP_LOG_DEBUG("reopen of port 0x%016Lx on adapter %s\n", |
| 587 | port->wwpn, zfcp_get_busid_by_port(port)); |
| 588 | |
| 589 | zfcp_erp_port_block(port, clear_mask); |
| 590 | |
| 591 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { |
| 592 | ZFCP_LOG_DEBUG("skipped reopen of failed port 0x%016Lx " |
| 593 | "on adapter %s\n", port->wwpn, |
| 594 | zfcp_get_busid_by_port(port)); |
| 595 | debug_text_event(adapter->erp_dbf, 5, "p_ro_f"); |
| 596 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 597 | /* ensure propagation of failed status to new devices */ |
| 598 | zfcp_erp_port_failed(port); |
| 599 | retval = -EIO; |
| 600 | goto out; |
| 601 | } |
| 602 | |
| 603 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, |
| 604 | port->adapter, port, NULL); |
| 605 | |
| 606 | out: |
| 607 | return retval; |
| 608 | } |
| 609 | |
| 610 | /** |
| 611 | * zfcp_erp_port_reopen - initiate reopen of a remote port |
| 612 | * @port: port to be reopened |
| 613 | * @clear_mask: specifies flags in port status to be cleared |
| 614 | * Return: 0 on success, < 0 on error |
| 615 | * |
| 616 | * This is a wrappper function for zfcp_erp_port_reopen_internal. It ensures |
| 617 | * correct locking. An error recovery task is initiated to do the reopen. |
| 618 | * To wait for the completion of the reopen zfcp_erp_wait should be used. |
| 619 | */ |
| 620 | int |
| 621 | zfcp_erp_port_reopen(struct zfcp_port *port, int clear_mask) |
| 622 | { |
| 623 | int retval; |
| 624 | unsigned long flags; |
| 625 | struct zfcp_adapter *adapter = port->adapter; |
| 626 | |
| 627 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 628 | write_lock(&adapter->erp_lock); |
| 629 | retval = zfcp_erp_port_reopen_internal(port, clear_mask); |
| 630 | write_unlock(&adapter->erp_lock); |
| 631 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 632 | |
| 633 | return retval; |
| 634 | } |
| 635 | |
| 636 | /* |
| 637 | * function: |
| 638 | * |
| 639 | * purpose: called if a unit is to be opened |
| 640 | * initiates Reopen recovery which is done |
| 641 | * asynchronously |
| 642 | * |
| 643 | * returns: 0 - initiated action succesfully |
| 644 | * <0 - failed to initiate action |
| 645 | */ |
| 646 | static int |
| 647 | zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask) |
| 648 | { |
| 649 | int retval; |
| 650 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 651 | |
| 652 | debug_text_event(adapter->erp_dbf, 5, "u_ro"); |
| 653 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 654 | ZFCP_LOG_DEBUG("reopen of unit 0x%016Lx on port 0x%016Lx " |
| 655 | "on adapter %s\n", unit->fcp_lun, |
| 656 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); |
| 657 | |
| 658 | zfcp_erp_unit_block(unit, clear_mask); |
| 659 | |
| 660 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { |
| 661 | ZFCP_LOG_DEBUG("skipped reopen of failed unit 0x%016Lx " |
| 662 | "on port 0x%016Lx on adapter %s\n", |
| 663 | unit->fcp_lun, unit->port->wwpn, |
| 664 | zfcp_get_busid_by_unit(unit)); |
| 665 | debug_text_event(adapter->erp_dbf, 5, "u_ro_f"); |
| 666 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 667 | sizeof (fcp_lun_t)); |
| 668 | retval = -EIO; |
| 669 | goto out; |
| 670 | } |
| 671 | |
| 672 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, |
| 673 | unit->port->adapter, unit->port, unit); |
| 674 | out: |
| 675 | return retval; |
| 676 | } |
| 677 | |
| 678 | /** |
| 679 | * zfcp_erp_unit_reopen - initiate reopen of a unit |
| 680 | * @unit: unit to be reopened |
| 681 | * @clear_mask: specifies flags in unit status to be cleared |
| 682 | * Return: 0 on success, < 0 on error |
| 683 | * |
| 684 | * This is a wrappper for zfcp_erp_unit_reopen_internal. It ensures correct |
| 685 | * locking. An error recovery task is initiated to do the reopen. |
| 686 | * To wait for the completion of the reopen zfcp_erp_wait should be used. |
| 687 | */ |
| 688 | int |
| 689 | zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask) |
| 690 | { |
| 691 | int retval; |
| 692 | unsigned long flags; |
| 693 | struct zfcp_adapter *adapter; |
| 694 | struct zfcp_port *port; |
| 695 | |
| 696 | port = unit->port; |
| 697 | adapter = port->adapter; |
| 698 | |
| 699 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 700 | write_lock(&adapter->erp_lock); |
| 701 | retval = zfcp_erp_unit_reopen_internal(unit, clear_mask); |
| 702 | write_unlock(&adapter->erp_lock); |
| 703 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 704 | |
| 705 | return retval; |
| 706 | } |
| 707 | |
| 708 | /* |
| 709 | * function: |
| 710 | * |
| 711 | * purpose: disable I/O, |
| 712 | * return any open requests and clean them up, |
| 713 | * aim: no pending and incoming I/O |
| 714 | * |
| 715 | * returns: |
| 716 | */ |
| 717 | static void |
| 718 | zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask) |
| 719 | { |
| 720 | debug_text_event(adapter->erp_dbf, 6, "a_bl"); |
| 721 | zfcp_erp_modify_adapter_status(adapter, |
| 722 | ZFCP_STATUS_COMMON_UNBLOCKED | |
| 723 | clear_mask, ZFCP_CLEAR); |
| 724 | } |
| 725 | |
| 726 | /* |
| 727 | * function: |
| 728 | * |
| 729 | * purpose: enable I/O |
| 730 | * |
| 731 | * returns: |
| 732 | */ |
| 733 | static void |
| 734 | zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) |
| 735 | { |
| 736 | debug_text_event(adapter->erp_dbf, 6, "a_ubl"); |
| 737 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); |
| 738 | } |
| 739 | |
| 740 | /* |
| 741 | * function: |
| 742 | * |
| 743 | * purpose: disable I/O, |
| 744 | * return any open requests and clean them up, |
| 745 | * aim: no pending and incoming I/O |
| 746 | * |
| 747 | * returns: |
| 748 | */ |
| 749 | static void |
| 750 | zfcp_erp_port_block(struct zfcp_port *port, int clear_mask) |
| 751 | { |
| 752 | struct zfcp_adapter *adapter = port->adapter; |
| 753 | |
| 754 | debug_text_event(adapter->erp_dbf, 6, "p_bl"); |
| 755 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 756 | zfcp_erp_modify_port_status(port, |
| 757 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, |
| 758 | ZFCP_CLEAR); |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * function: |
| 763 | * |
| 764 | * purpose: enable I/O |
| 765 | * |
| 766 | * returns: |
| 767 | */ |
| 768 | static void |
| 769 | zfcp_erp_port_unblock(struct zfcp_port *port) |
| 770 | { |
| 771 | struct zfcp_adapter *adapter = port->adapter; |
| 772 | |
| 773 | debug_text_event(adapter->erp_dbf, 6, "p_ubl"); |
| 774 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 775 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); |
| 776 | } |
| 777 | |
| 778 | /* |
| 779 | * function: |
| 780 | * |
| 781 | * purpose: disable I/O, |
| 782 | * return any open requests and clean them up, |
| 783 | * aim: no pending and incoming I/O |
| 784 | * |
| 785 | * returns: |
| 786 | */ |
| 787 | static void |
| 788 | zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) |
| 789 | { |
| 790 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 791 | |
| 792 | debug_text_event(adapter->erp_dbf, 6, "u_bl"); |
| 793 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 794 | zfcp_erp_modify_unit_status(unit, |
| 795 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, |
| 796 | ZFCP_CLEAR); |
| 797 | } |
| 798 | |
| 799 | /* |
| 800 | * function: |
| 801 | * |
| 802 | * purpose: enable I/O |
| 803 | * |
| 804 | * returns: |
| 805 | */ |
| 806 | static void |
| 807 | zfcp_erp_unit_unblock(struct zfcp_unit *unit) |
| 808 | { |
| 809 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 810 | |
| 811 | debug_text_event(adapter->erp_dbf, 6, "u_ubl"); |
| 812 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 813 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status); |
| 814 | } |
| 815 | |
| 816 | /* |
| 817 | * function: |
| 818 | * |
| 819 | * purpose: |
| 820 | * |
| 821 | * returns: |
| 822 | */ |
| 823 | static void |
| 824 | zfcp_erp_action_ready(struct zfcp_erp_action *erp_action) |
| 825 | { |
| 826 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 827 | |
| 828 | debug_text_event(adapter->erp_dbf, 4, "a_ar"); |
| 829 | debug_event(adapter->erp_dbf, 4, &erp_action->action, sizeof (int)); |
| 830 | |
| 831 | zfcp_erp_action_to_ready(erp_action); |
| 832 | up(&adapter->erp_ready_sem); |
| 833 | } |
| 834 | |
| 835 | /* |
| 836 | * function: |
| 837 | * |
| 838 | * purpose: |
| 839 | * |
| 840 | * returns: <0 erp_action not found in any list |
| 841 | * ZFCP_ERP_ACTION_READY erp_action is in ready list |
| 842 | * ZFCP_ERP_ACTION_RUNNING erp_action is in running list |
| 843 | * |
| 844 | * locks: erp_lock must be held |
| 845 | */ |
| 846 | static int |
| 847 | zfcp_erp_action_exists(struct zfcp_erp_action *erp_action) |
| 848 | { |
| 849 | int retval = -EINVAL; |
| 850 | struct list_head *entry; |
| 851 | struct zfcp_erp_action *entry_erp_action; |
| 852 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 853 | |
| 854 | /* search in running list */ |
| 855 | list_for_each(entry, &adapter->erp_running_head) { |
| 856 | entry_erp_action = |
| 857 | list_entry(entry, struct zfcp_erp_action, list); |
| 858 | if (entry_erp_action == erp_action) { |
| 859 | retval = ZFCP_ERP_ACTION_RUNNING; |
| 860 | goto out; |
| 861 | } |
| 862 | } |
| 863 | /* search in ready list */ |
| 864 | list_for_each(entry, &adapter->erp_ready_head) { |
| 865 | entry_erp_action = |
| 866 | list_entry(entry, struct zfcp_erp_action, list); |
| 867 | if (entry_erp_action == erp_action) { |
| 868 | retval = ZFCP_ERP_ACTION_READY; |
| 869 | goto out; |
| 870 | } |
| 871 | } |
| 872 | |
| 873 | out: |
| 874 | return retval; |
| 875 | } |
| 876 | |
| 877 | /* |
| 878 | * purpose: checks current status of action (timed out, dismissed, ...) |
| 879 | * and does appropriate preparations (dismiss fsf request, ...) |
| 880 | * |
| 881 | * locks: called under erp_lock (disabled interrupts) |
| 882 | * |
| 883 | * returns: 0 |
| 884 | */ |
| 885 | static int |
| 886 | zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) |
| 887 | { |
| 888 | int retval = 0; |
| 889 | struct zfcp_fsf_req *fsf_req; |
| 890 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 891 | |
| 892 | if (erp_action->fsf_req) { |
| 893 | /* take lock to ensure that request is not being deleted meanwhile */ |
Andreas Herrmann | 1db2c9c | 2005-06-13 13:20:35 +0200 | [diff] [blame] | 894 | spin_lock(&adapter->fsf_req_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | /* check whether fsf req does still exist */ |
| 896 | list_for_each_entry(fsf_req, &adapter->fsf_req_list_head, list) |
| 897 | if (fsf_req == erp_action->fsf_req) |
| 898 | break; |
| 899 | if (fsf_req == erp_action->fsf_req) { |
| 900 | /* fsf_req still exists */ |
| 901 | debug_text_event(adapter->erp_dbf, 3, "a_ca_req"); |
| 902 | debug_event(adapter->erp_dbf, 3, &fsf_req, |
| 903 | sizeof (unsigned long)); |
| 904 | /* dismiss fsf_req of timed out or dismissed erp_action */ |
| 905 | if (erp_action->status & (ZFCP_STATUS_ERP_DISMISSED | |
| 906 | ZFCP_STATUS_ERP_TIMEDOUT)) { |
| 907 | debug_text_event(adapter->erp_dbf, 3, |
| 908 | "a_ca_disreq"); |
| 909 | fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; |
| 910 | } |
| 911 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
| 912 | ZFCP_LOG_NORMAL("error: erp step timed out " |
| 913 | "(action=%d, fsf_req=%p)\n ", |
| 914 | erp_action->action, |
| 915 | erp_action->fsf_req); |
| 916 | } |
| 917 | /* |
| 918 | * If fsf_req is neither dismissed nor completed |
| 919 | * then keep it running asynchronously and don't mess |
| 920 | * with the association of erp_action and fsf_req. |
| 921 | */ |
| 922 | if (fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED | |
| 923 | ZFCP_STATUS_FSFREQ_DISMISSED)) { |
| 924 | /* forget about association between fsf_req |
| 925 | and erp_action */ |
| 926 | fsf_req->erp_action = NULL; |
| 927 | erp_action->fsf_req = NULL; |
| 928 | } |
| 929 | } else { |
| 930 | debug_text_event(adapter->erp_dbf, 3, "a_ca_gonereq"); |
| 931 | /* |
| 932 | * even if this fsf_req has gone, forget about |
| 933 | * association between erp_action and fsf_req |
| 934 | */ |
| 935 | erp_action->fsf_req = NULL; |
| 936 | } |
Andreas Herrmann | 1db2c9c | 2005-06-13 13:20:35 +0200 | [diff] [blame] | 937 | spin_unlock(&adapter->fsf_req_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | } else |
| 939 | debug_text_event(adapter->erp_dbf, 3, "a_ca_noreq"); |
| 940 | |
| 941 | return retval; |
| 942 | } |
| 943 | |
| 944 | /* |
| 945 | * purpose: generic handler for asynchronous events related to erp_action events |
| 946 | * (normal completion, time-out, dismissing, retry after |
| 947 | * low memory condition) |
| 948 | * |
| 949 | * note: deletion of timer is not required (e.g. in case of a time-out), |
| 950 | * but a second try does no harm, |
| 951 | * we leave it in here to allow for greater simplification |
| 952 | * |
| 953 | * returns: 0 - there was an action to handle |
| 954 | * !0 - otherwise |
| 955 | */ |
| 956 | static int |
| 957 | zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action, |
| 958 | unsigned long set_mask) |
| 959 | { |
| 960 | int retval; |
| 961 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 962 | |
| 963 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { |
| 964 | debug_text_event(adapter->erp_dbf, 2, "a_asyh_ex"); |
| 965 | debug_event(adapter->erp_dbf, 2, &erp_action->action, |
| 966 | sizeof (int)); |
| 967 | if (!(set_mask & ZFCP_STATUS_ERP_TIMEDOUT)) |
| 968 | del_timer(&erp_action->timer); |
| 969 | erp_action->status |= set_mask; |
| 970 | zfcp_erp_action_ready(erp_action); |
| 971 | retval = 0; |
| 972 | } else { |
| 973 | /* action is ready or gone - nothing to do */ |
| 974 | debug_text_event(adapter->erp_dbf, 3, "a_asyh_gone"); |
| 975 | debug_event(adapter->erp_dbf, 3, &erp_action->action, |
| 976 | sizeof (int)); |
| 977 | retval = 1; |
| 978 | } |
| 979 | |
| 980 | return retval; |
| 981 | } |
| 982 | |
| 983 | /* |
| 984 | * purpose: generic handler for asynchronous events related to erp_action |
| 985 | * events (normal completion, time-out, dismissing, retry after |
| 986 | * low memory condition) |
| 987 | * |
| 988 | * note: deletion of timer is not required (e.g. in case of a time-out), |
| 989 | * but a second try does no harm, |
| 990 | * we leave it in here to allow for greater simplification |
| 991 | * |
| 992 | * returns: 0 - there was an action to handle |
| 993 | * !0 - otherwise |
| 994 | */ |
| 995 | int |
| 996 | zfcp_erp_async_handler(struct zfcp_erp_action *erp_action, |
| 997 | unsigned long set_mask) |
| 998 | { |
| 999 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1000 | unsigned long flags; |
| 1001 | int retval; |
| 1002 | |
| 1003 | write_lock_irqsave(&adapter->erp_lock, flags); |
| 1004 | retval = zfcp_erp_async_handler_nolock(erp_action, set_mask); |
| 1005 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
| 1006 | |
| 1007 | return retval; |
| 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | * purpose: is called for erp_action which was slept waiting for |
| 1012 | * memory becoming avaliable, |
| 1013 | * will trigger that this action will be continued |
| 1014 | */ |
| 1015 | static void |
| 1016 | zfcp_erp_memwait_handler(unsigned long data) |
| 1017 | { |
| 1018 | struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; |
| 1019 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1020 | |
| 1021 | debug_text_event(adapter->erp_dbf, 2, "a_mwh"); |
| 1022 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); |
| 1023 | |
| 1024 | zfcp_erp_async_handler(erp_action, 0); |
| 1025 | } |
| 1026 | |
| 1027 | /* |
| 1028 | * purpose: is called if an asynchronous erp step timed out, |
| 1029 | * action gets an appropriate flag and will be processed |
| 1030 | * accordingly |
| 1031 | */ |
| 1032 | static void |
| 1033 | zfcp_erp_timeout_handler(unsigned long data) |
| 1034 | { |
| 1035 | struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; |
| 1036 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1037 | |
| 1038 | debug_text_event(adapter->erp_dbf, 2, "a_th"); |
| 1039 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); |
| 1040 | |
| 1041 | zfcp_erp_async_handler(erp_action, ZFCP_STATUS_ERP_TIMEDOUT); |
| 1042 | } |
| 1043 | |
| 1044 | /* |
| 1045 | * purpose: is called for an erp_action which needs to be ended |
| 1046 | * though not being done, |
| 1047 | * this is usually required if an higher is generated, |
| 1048 | * action gets an appropriate flag and will be processed |
| 1049 | * accordingly |
| 1050 | * |
| 1051 | * locks: erp_lock held (thus we need to call another handler variant) |
| 1052 | */ |
| 1053 | static int |
| 1054 | zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action) |
| 1055 | { |
| 1056 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1057 | |
| 1058 | debug_text_event(adapter->erp_dbf, 2, "a_adis"); |
| 1059 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); |
| 1060 | |
| 1061 | zfcp_erp_async_handler_nolock(erp_action, ZFCP_STATUS_ERP_DISMISSED); |
| 1062 | |
| 1063 | return 0; |
| 1064 | } |
| 1065 | |
| 1066 | int |
| 1067 | zfcp_erp_thread_setup(struct zfcp_adapter *adapter) |
| 1068 | { |
| 1069 | int retval = 0; |
| 1070 | |
| 1071 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); |
| 1072 | |
| 1073 | rwlock_init(&adapter->erp_lock); |
| 1074 | INIT_LIST_HEAD(&adapter->erp_ready_head); |
| 1075 | INIT_LIST_HEAD(&adapter->erp_running_head); |
| 1076 | sema_init(&adapter->erp_ready_sem, 0); |
| 1077 | |
| 1078 | retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD); |
| 1079 | if (retval < 0) { |
| 1080 | ZFCP_LOG_NORMAL("error: creation of erp thread failed for " |
| 1081 | "adapter %s\n", |
| 1082 | zfcp_get_busid_by_adapter(adapter)); |
| 1083 | debug_text_event(adapter->erp_dbf, 5, "a_thset_fail"); |
| 1084 | } else { |
| 1085 | wait_event(adapter->erp_thread_wqh, |
| 1086 | atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, |
| 1087 | &adapter->status)); |
| 1088 | debug_text_event(adapter->erp_dbf, 5, "a_thset_ok"); |
| 1089 | } |
| 1090 | |
| 1091 | return (retval < 0); |
| 1092 | } |
| 1093 | |
| 1094 | /* |
| 1095 | * function: |
| 1096 | * |
| 1097 | * purpose: |
| 1098 | * |
| 1099 | * returns: |
| 1100 | * |
| 1101 | * context: process (i.e. proc-fs or rmmod/insmod) |
| 1102 | * |
| 1103 | * note: The caller of this routine ensures that the specified |
| 1104 | * adapter has been shut down and that this operation |
| 1105 | * has been completed. Thus, there are no pending erp_actions |
| 1106 | * which would need to be handled here. |
| 1107 | */ |
| 1108 | int |
| 1109 | zfcp_erp_thread_kill(struct zfcp_adapter *adapter) |
| 1110 | { |
| 1111 | int retval = 0; |
| 1112 | |
| 1113 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status); |
| 1114 | up(&adapter->erp_ready_sem); |
| 1115 | |
| 1116 | wait_event(adapter->erp_thread_wqh, |
| 1117 | !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, |
| 1118 | &adapter->status)); |
| 1119 | |
| 1120 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, |
| 1121 | &adapter->status); |
| 1122 | |
| 1123 | debug_text_event(adapter->erp_dbf, 5, "a_thki_ok"); |
| 1124 | |
| 1125 | return retval; |
| 1126 | } |
| 1127 | |
| 1128 | /* |
| 1129 | * purpose: is run as a kernel thread, |
| 1130 | * goes through list of error recovery actions of associated adapter |
| 1131 | * and delegates single action to execution |
| 1132 | * |
| 1133 | * returns: 0 |
| 1134 | */ |
| 1135 | static int |
| 1136 | zfcp_erp_thread(void *data) |
| 1137 | { |
| 1138 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
| 1139 | struct list_head *next; |
| 1140 | struct zfcp_erp_action *erp_action; |
| 1141 | unsigned long flags; |
| 1142 | |
| 1143 | daemonize("zfcperp%s", zfcp_get_busid_by_adapter(adapter)); |
| 1144 | /* Block all signals */ |
| 1145 | siginitsetinv(¤t->blocked, 0); |
| 1146 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); |
| 1147 | debug_text_event(adapter->erp_dbf, 5, "a_th_run"); |
| 1148 | wake_up(&adapter->erp_thread_wqh); |
| 1149 | |
| 1150 | while (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, |
| 1151 | &adapter->status)) { |
| 1152 | |
| 1153 | write_lock_irqsave(&adapter->erp_lock, flags); |
| 1154 | next = adapter->erp_ready_head.prev; |
| 1155 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
| 1156 | |
| 1157 | if (next != &adapter->erp_ready_head) { |
| 1158 | erp_action = |
| 1159 | list_entry(next, struct zfcp_erp_action, list); |
| 1160 | /* |
| 1161 | * process action (incl. [re]moving it |
| 1162 | * from 'ready' queue) |
| 1163 | */ |
| 1164 | zfcp_erp_strategy(erp_action); |
| 1165 | } |
| 1166 | |
| 1167 | /* |
| 1168 | * sleep as long as there is nothing to do, i.e. |
| 1169 | * no action in 'ready' queue to be processed and |
| 1170 | * thread is not to be killed |
| 1171 | */ |
| 1172 | down_interruptible(&adapter->erp_ready_sem); |
| 1173 | debug_text_event(adapter->erp_dbf, 5, "a_th_woken"); |
| 1174 | } |
| 1175 | |
| 1176 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); |
| 1177 | debug_text_event(adapter->erp_dbf, 5, "a_th_stop"); |
| 1178 | wake_up(&adapter->erp_thread_wqh); |
| 1179 | |
| 1180 | return 0; |
| 1181 | } |
| 1182 | |
| 1183 | /* |
| 1184 | * function: |
| 1185 | * |
| 1186 | * purpose: drives single error recovery action and schedules higher and |
| 1187 | * subordinate actions, if necessary |
| 1188 | * |
| 1189 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 1190 | * ZFCP_ERP_SUCCEEDED - action finished successfully (deqd) |
| 1191 | * ZFCP_ERP_FAILED - action finished unsuccessfully (deqd) |
| 1192 | * ZFCP_ERP_EXIT - action finished (dequeued), offline |
| 1193 | * ZFCP_ERP_DISMISSED - action canceled (dequeued) |
| 1194 | */ |
| 1195 | static int |
| 1196 | zfcp_erp_strategy(struct zfcp_erp_action *erp_action) |
| 1197 | { |
| 1198 | int retval = 0; |
| 1199 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1200 | struct zfcp_port *port = erp_action->port; |
| 1201 | struct zfcp_unit *unit = erp_action->unit; |
| 1202 | int action = erp_action->action; |
| 1203 | u32 status = erp_action->status; |
| 1204 | unsigned long flags; |
| 1205 | |
| 1206 | /* serialise dismissing, timing out, moving, enqueueing */ |
| 1207 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 1208 | write_lock(&adapter->erp_lock); |
| 1209 | |
| 1210 | /* dequeue dismissed action and leave, if required */ |
| 1211 | retval = zfcp_erp_strategy_check_action(erp_action, retval); |
| 1212 | if (retval == ZFCP_ERP_DISMISSED) { |
| 1213 | debug_text_event(adapter->erp_dbf, 4, "a_st_dis1"); |
| 1214 | goto unlock; |
| 1215 | } |
| 1216 | |
| 1217 | /* |
| 1218 | * move action to 'running' queue before processing it |
| 1219 | * (to avoid a race condition regarding moving the |
| 1220 | * action to the 'running' queue and back) |
| 1221 | */ |
| 1222 | zfcp_erp_action_to_running(erp_action); |
| 1223 | |
| 1224 | /* |
| 1225 | * try to process action as far as possible, |
| 1226 | * no lock to allow for blocking operations (kmalloc, qdio, ...), |
| 1227 | * afterwards the lock is required again for the following reasons: |
| 1228 | * - dequeueing of finished action and enqueueing of |
| 1229 | * follow-up actions must be atomic so that any other |
| 1230 | * reopen-routine does not believe there is nothing to do |
| 1231 | * and that it is safe to enqueue something else, |
| 1232 | * - we want to force any control thread which is dismissing |
| 1233 | * actions to finish this before we decide about |
| 1234 | * necessary steps to be taken here further |
| 1235 | */ |
| 1236 | write_unlock(&adapter->erp_lock); |
| 1237 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 1238 | retval = zfcp_erp_strategy_do_action(erp_action); |
| 1239 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 1240 | write_lock(&adapter->erp_lock); |
| 1241 | |
| 1242 | /* |
| 1243 | * check for dismissed status again to avoid follow-up actions, |
| 1244 | * failing of targets and so on for dismissed actions |
| 1245 | */ |
| 1246 | retval = zfcp_erp_strategy_check_action(erp_action, retval); |
| 1247 | |
| 1248 | switch (retval) { |
| 1249 | case ZFCP_ERP_DISMISSED: |
| 1250 | /* leave since this action has ridden to its ancestors */ |
| 1251 | debug_text_event(adapter->erp_dbf, 6, "a_st_dis2"); |
| 1252 | goto unlock; |
| 1253 | case ZFCP_ERP_NOMEM: |
| 1254 | /* no memory to continue immediately, let it sleep */ |
| 1255 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { |
| 1256 | ++adapter->erp_low_mem_count; |
| 1257 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; |
| 1258 | } |
| 1259 | /* This condition is true if there is no memory available |
| 1260 | for any erp_action on this adapter. This implies that there |
| 1261 | are no elements in the memory pool(s) left for erp_actions. |
| 1262 | This might happen if an erp_action that used a memory pool |
| 1263 | element was timed out. |
| 1264 | */ |
| 1265 | if (adapter->erp_total_count == adapter->erp_low_mem_count) { |
| 1266 | debug_text_event(adapter->erp_dbf, 3, "a_st_lowmem"); |
| 1267 | ZFCP_LOG_NORMAL("error: no mempool elements available, " |
| 1268 | "restarting I/O on adapter %s " |
| 1269 | "to free mempool\n", |
| 1270 | zfcp_get_busid_by_adapter(adapter)); |
| 1271 | zfcp_erp_adapter_reopen_internal(adapter, 0); |
| 1272 | } else { |
| 1273 | debug_text_event(adapter->erp_dbf, 2, "a_st_memw"); |
| 1274 | retval = zfcp_erp_strategy_memwait(erp_action); |
| 1275 | } |
| 1276 | goto unlock; |
| 1277 | case ZFCP_ERP_CONTINUES: |
| 1278 | /* leave since this action runs asynchronously */ |
| 1279 | debug_text_event(adapter->erp_dbf, 6, "a_st_cont"); |
| 1280 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { |
| 1281 | --adapter->erp_low_mem_count; |
| 1282 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; |
| 1283 | } |
| 1284 | goto unlock; |
| 1285 | } |
| 1286 | /* ok, finished action (whatever its result is) */ |
| 1287 | |
| 1288 | /* check for unrecoverable targets */ |
| 1289 | retval = zfcp_erp_strategy_check_target(erp_action, retval); |
| 1290 | |
| 1291 | /* action must be dequeued (here to allow for further ones) */ |
| 1292 | zfcp_erp_action_dequeue(erp_action); |
| 1293 | |
| 1294 | /* |
| 1295 | * put this target through the erp mill again if someone has |
| 1296 | * requested to change the status of a target being online |
| 1297 | * to offline or the other way around |
| 1298 | * (old retval is preserved if nothing has to be done here) |
| 1299 | */ |
| 1300 | retval = zfcp_erp_strategy_statechange(action, status, adapter, |
| 1301 | port, unit, retval); |
| 1302 | |
| 1303 | /* |
| 1304 | * leave if target is in permanent error state or if |
| 1305 | * action is repeated in order to process state change |
| 1306 | */ |
| 1307 | if (retval == ZFCP_ERP_EXIT) { |
| 1308 | debug_text_event(adapter->erp_dbf, 2, "a_st_exit"); |
| 1309 | goto unlock; |
| 1310 | } |
| 1311 | |
| 1312 | /* trigger follow up actions */ |
| 1313 | zfcp_erp_strategy_followup_actions(action, adapter, port, unit, retval); |
| 1314 | |
| 1315 | unlock: |
| 1316 | write_unlock(&adapter->erp_lock); |
| 1317 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 1318 | |
| 1319 | if (retval != ZFCP_ERP_CONTINUES) |
| 1320 | zfcp_erp_action_cleanup(action, adapter, port, unit, retval); |
| 1321 | |
| 1322 | /* |
| 1323 | * a few tasks remain when the erp queues are empty |
| 1324 | * (don't do that if the last action evaluated was dismissed |
| 1325 | * since this clearly indicates that there is more to come) : |
| 1326 | * - close the name server port if it is open yet |
| 1327 | * (enqueues another [probably] final action) |
| 1328 | * - otherwise, wake up whoever wants to be woken when we are |
| 1329 | * done with erp |
| 1330 | */ |
| 1331 | if (retval != ZFCP_ERP_DISMISSED) |
| 1332 | zfcp_erp_strategy_check_queues(adapter); |
| 1333 | |
| 1334 | debug_text_event(adapter->erp_dbf, 6, "a_st_done"); |
| 1335 | |
| 1336 | return retval; |
| 1337 | } |
| 1338 | |
| 1339 | /* |
| 1340 | * function: |
| 1341 | * |
| 1342 | * purpose: |
| 1343 | * |
| 1344 | * returns: ZFCP_ERP_DISMISSED - if action has been dismissed |
| 1345 | * retval - otherwise |
| 1346 | */ |
| 1347 | static int |
| 1348 | zfcp_erp_strategy_check_action(struct zfcp_erp_action *erp_action, int retval) |
| 1349 | { |
| 1350 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1351 | |
| 1352 | zfcp_erp_strategy_check_fsfreq(erp_action); |
| 1353 | |
| 1354 | debug_event(adapter->erp_dbf, 5, &erp_action->action, sizeof (int)); |
| 1355 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { |
| 1356 | debug_text_event(adapter->erp_dbf, 3, "a_stcd_dis"); |
| 1357 | zfcp_erp_action_dequeue(erp_action); |
| 1358 | retval = ZFCP_ERP_DISMISSED; |
| 1359 | } else |
| 1360 | debug_text_event(adapter->erp_dbf, 5, "a_stcd_nodis"); |
| 1361 | |
| 1362 | return retval; |
| 1363 | } |
| 1364 | |
| 1365 | /* |
| 1366 | * function: |
| 1367 | * |
| 1368 | * purpose: |
| 1369 | * |
| 1370 | * returns: |
| 1371 | */ |
| 1372 | static int |
| 1373 | zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) |
| 1374 | { |
| 1375 | int retval = ZFCP_ERP_FAILED; |
| 1376 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1377 | |
| 1378 | /* |
| 1379 | * try to execute/continue action as far as possible, |
| 1380 | * note: no lock in subsequent strategy routines |
| 1381 | * (this allows these routine to call schedule, e.g. |
| 1382 | * kmalloc with such flags or qdio_initialize & friends) |
| 1383 | * Note: in case of timeout, the seperate strategies will fail |
| 1384 | * anyhow. No need for a special action. Even worse, a nameserver |
| 1385 | * failure would not wake up waiting ports without the call. |
| 1386 | */ |
| 1387 | switch (erp_action->action) { |
| 1388 | |
| 1389 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 1390 | retval = zfcp_erp_adapter_strategy(erp_action); |
| 1391 | break; |
| 1392 | |
| 1393 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 1394 | retval = zfcp_erp_port_forced_strategy(erp_action); |
| 1395 | break; |
| 1396 | |
| 1397 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 1398 | retval = zfcp_erp_port_strategy(erp_action); |
| 1399 | break; |
| 1400 | |
| 1401 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 1402 | retval = zfcp_erp_unit_strategy(erp_action); |
| 1403 | break; |
| 1404 | |
| 1405 | default: |
| 1406 | debug_text_exception(adapter->erp_dbf, 1, "a_stda_bug"); |
| 1407 | debug_event(adapter->erp_dbf, 1, &erp_action->action, |
| 1408 | sizeof (int)); |
| 1409 | ZFCP_LOG_NORMAL("bug: unknown erp action requested on " |
| 1410 | "adapter %s (action=%d)\n", |
| 1411 | zfcp_get_busid_by_adapter(erp_action->adapter), |
| 1412 | erp_action->action); |
| 1413 | } |
| 1414 | |
| 1415 | return retval; |
| 1416 | } |
| 1417 | |
| 1418 | /* |
| 1419 | * function: |
| 1420 | * |
| 1421 | * purpose: triggers retry of this action after a certain amount of time |
| 1422 | * by means of timer provided by erp_action |
| 1423 | * |
| 1424 | * returns: ZFCP_ERP_CONTINUES - erp_action sleeps in erp running queue |
| 1425 | */ |
| 1426 | static int |
| 1427 | zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) |
| 1428 | { |
| 1429 | int retval = ZFCP_ERP_CONTINUES; |
| 1430 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1431 | |
| 1432 | debug_text_event(adapter->erp_dbf, 6, "a_mwinit"); |
| 1433 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); |
| 1434 | init_timer(&erp_action->timer); |
| 1435 | erp_action->timer.function = zfcp_erp_memwait_handler; |
| 1436 | erp_action->timer.data = (unsigned long) erp_action; |
| 1437 | erp_action->timer.expires = jiffies + ZFCP_ERP_MEMWAIT_TIMEOUT; |
| 1438 | add_timer(&erp_action->timer); |
| 1439 | |
| 1440 | return retval; |
| 1441 | } |
| 1442 | |
| 1443 | /* |
| 1444 | * function: zfcp_erp_adapter_failed |
| 1445 | * |
| 1446 | * purpose: sets the adapter and all underlying devices to ERP_FAILED |
| 1447 | * |
| 1448 | */ |
| 1449 | void |
| 1450 | zfcp_erp_adapter_failed(struct zfcp_adapter *adapter) |
| 1451 | { |
| 1452 | zfcp_erp_modify_adapter_status(adapter, |
| 1453 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); |
| 1454 | ZFCP_LOG_NORMAL("adapter erp failed on adapter %s\n", |
| 1455 | zfcp_get_busid_by_adapter(adapter)); |
| 1456 | debug_text_event(adapter->erp_dbf, 2, "a_afail"); |
| 1457 | } |
| 1458 | |
| 1459 | /* |
| 1460 | * function: zfcp_erp_port_failed |
| 1461 | * |
| 1462 | * purpose: sets the port and all underlying devices to ERP_FAILED |
| 1463 | * |
| 1464 | */ |
| 1465 | void |
| 1466 | zfcp_erp_port_failed(struct zfcp_port *port) |
| 1467 | { |
| 1468 | zfcp_erp_modify_port_status(port, |
| 1469 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); |
| 1470 | |
| 1471 | if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) |
| 1472 | ZFCP_LOG_NORMAL("port erp failed (adapter %s, " |
| 1473 | "port d_id=0x%08x)\n", |
| 1474 | zfcp_get_busid_by_port(port), port->d_id); |
| 1475 | else |
| 1476 | ZFCP_LOG_NORMAL("port erp failed (adapter %s, wwpn=0x%016Lx)\n", |
| 1477 | zfcp_get_busid_by_port(port), port->wwpn); |
| 1478 | |
| 1479 | debug_text_event(port->adapter->erp_dbf, 2, "p_pfail"); |
| 1480 | debug_event(port->adapter->erp_dbf, 2, &port->wwpn, sizeof (wwn_t)); |
| 1481 | } |
| 1482 | |
| 1483 | /* |
| 1484 | * function: zfcp_erp_unit_failed |
| 1485 | * |
| 1486 | * purpose: sets the unit to ERP_FAILED |
| 1487 | * |
| 1488 | */ |
| 1489 | void |
| 1490 | zfcp_erp_unit_failed(struct zfcp_unit *unit) |
| 1491 | { |
| 1492 | zfcp_erp_modify_unit_status(unit, |
| 1493 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); |
| 1494 | |
| 1495 | ZFCP_LOG_NORMAL("unit erp failed on unit 0x%016Lx on port 0x%016Lx " |
| 1496 | " on adapter %s\n", unit->fcp_lun, |
| 1497 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); |
| 1498 | debug_text_event(unit->port->adapter->erp_dbf, 2, "u_ufail"); |
| 1499 | debug_event(unit->port->adapter->erp_dbf, 2, |
| 1500 | &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 1501 | } |
| 1502 | |
| 1503 | /* |
| 1504 | * function: zfcp_erp_strategy_check_target |
| 1505 | * |
| 1506 | * purpose: increments the erp action count on the device currently in |
| 1507 | * recovery if the action failed or resets the count in case of |
| 1508 | * success. If a maximum count is exceeded the device is marked |
| 1509 | * as ERP_FAILED. |
| 1510 | * The 'blocked' state of a target which has been recovered |
| 1511 | * successfully is reset. |
| 1512 | * |
| 1513 | * returns: ZFCP_ERP_CONTINUES - action continues (not considered) |
| 1514 | * ZFCP_ERP_SUCCEEDED - action finished successfully |
| 1515 | * ZFCP_ERP_EXIT - action failed and will not continue |
| 1516 | */ |
| 1517 | static int |
| 1518 | zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, int result) |
| 1519 | { |
| 1520 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1521 | struct zfcp_port *port = erp_action->port; |
| 1522 | struct zfcp_unit *unit = erp_action->unit; |
| 1523 | |
| 1524 | debug_text_event(adapter->erp_dbf, 5, "a_stct_norm"); |
| 1525 | debug_event(adapter->erp_dbf, 5, &erp_action->action, sizeof (int)); |
| 1526 | debug_event(adapter->erp_dbf, 5, &result, sizeof (int)); |
| 1527 | |
| 1528 | switch (erp_action->action) { |
| 1529 | |
| 1530 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 1531 | result = zfcp_erp_strategy_check_unit(unit, result); |
| 1532 | break; |
| 1533 | |
| 1534 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 1535 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 1536 | result = zfcp_erp_strategy_check_port(port, result); |
| 1537 | break; |
| 1538 | |
| 1539 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 1540 | result = zfcp_erp_strategy_check_adapter(adapter, result); |
| 1541 | break; |
| 1542 | } |
| 1543 | |
| 1544 | return result; |
| 1545 | } |
| 1546 | |
| 1547 | /* |
| 1548 | * function: |
| 1549 | * |
| 1550 | * purpose: |
| 1551 | * |
| 1552 | * returns: |
| 1553 | */ |
| 1554 | static int |
| 1555 | zfcp_erp_strategy_statechange(int action, |
| 1556 | u32 status, |
| 1557 | struct zfcp_adapter *adapter, |
| 1558 | struct zfcp_port *port, |
| 1559 | struct zfcp_unit *unit, int retval) |
| 1560 | { |
| 1561 | debug_text_event(adapter->erp_dbf, 3, "a_stsc"); |
| 1562 | debug_event(adapter->erp_dbf, 3, &action, sizeof (int)); |
| 1563 | |
| 1564 | switch (action) { |
| 1565 | |
| 1566 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 1567 | if (zfcp_erp_strategy_statechange_detected(&adapter->status, |
| 1568 | status)) { |
| 1569 | zfcp_erp_adapter_reopen_internal(adapter, ZFCP_STATUS_COMMON_ERP_FAILED); |
| 1570 | retval = ZFCP_ERP_EXIT; |
| 1571 | } |
| 1572 | break; |
| 1573 | |
| 1574 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 1575 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 1576 | if (zfcp_erp_strategy_statechange_detected(&port->status, |
| 1577 | status)) { |
| 1578 | zfcp_erp_port_reopen_internal(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
| 1579 | retval = ZFCP_ERP_EXIT; |
| 1580 | } |
| 1581 | break; |
| 1582 | |
| 1583 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 1584 | if (zfcp_erp_strategy_statechange_detected(&unit->status, |
| 1585 | status)) { |
| 1586 | zfcp_erp_unit_reopen_internal(unit, ZFCP_STATUS_COMMON_ERP_FAILED); |
| 1587 | retval = ZFCP_ERP_EXIT; |
| 1588 | } |
| 1589 | break; |
| 1590 | } |
| 1591 | |
| 1592 | return retval; |
| 1593 | } |
| 1594 | |
| 1595 | /* |
| 1596 | * function: |
| 1597 | * |
| 1598 | * purpose: |
| 1599 | * |
| 1600 | * returns: |
| 1601 | */ |
| 1602 | static inline int |
| 1603 | zfcp_erp_strategy_statechange_detected(atomic_t * target_status, u32 erp_status) |
| 1604 | { |
| 1605 | return |
| 1606 | /* take it online */ |
| 1607 | (atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && |
| 1608 | (ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)) || |
| 1609 | /* take it offline */ |
| 1610 | (!atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && |
| 1611 | !(ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)); |
| 1612 | } |
| 1613 | |
| 1614 | /* |
| 1615 | * function: |
| 1616 | * |
| 1617 | * purpose: |
| 1618 | * |
| 1619 | * returns: |
| 1620 | */ |
| 1621 | static int |
| 1622 | zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) |
| 1623 | { |
| 1624 | debug_text_event(unit->port->adapter->erp_dbf, 5, "u_stct"); |
| 1625 | debug_event(unit->port->adapter->erp_dbf, 5, &unit->fcp_lun, |
| 1626 | sizeof (fcp_lun_t)); |
| 1627 | |
| 1628 | switch (result) { |
| 1629 | case ZFCP_ERP_SUCCEEDED : |
| 1630 | atomic_set(&unit->erp_counter, 0); |
| 1631 | zfcp_erp_unit_unblock(unit); |
| 1632 | break; |
| 1633 | case ZFCP_ERP_FAILED : |
| 1634 | atomic_inc(&unit->erp_counter); |
| 1635 | if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) |
| 1636 | zfcp_erp_unit_failed(unit); |
| 1637 | break; |
| 1638 | case ZFCP_ERP_EXIT : |
| 1639 | /* nothing */ |
| 1640 | break; |
| 1641 | } |
| 1642 | |
| 1643 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { |
| 1644 | zfcp_erp_unit_block(unit, 0); /* for ZFCP_ERP_SUCCEEDED */ |
| 1645 | result = ZFCP_ERP_EXIT; |
| 1646 | } |
| 1647 | |
| 1648 | return result; |
| 1649 | } |
| 1650 | |
| 1651 | /* |
| 1652 | * function: |
| 1653 | * |
| 1654 | * purpose: |
| 1655 | * |
| 1656 | * returns: |
| 1657 | */ |
| 1658 | static int |
| 1659 | zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) |
| 1660 | { |
| 1661 | debug_text_event(port->adapter->erp_dbf, 5, "p_stct"); |
| 1662 | debug_event(port->adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 1663 | |
| 1664 | switch (result) { |
| 1665 | case ZFCP_ERP_SUCCEEDED : |
| 1666 | atomic_set(&port->erp_counter, 0); |
| 1667 | zfcp_erp_port_unblock(port); |
| 1668 | break; |
| 1669 | case ZFCP_ERP_FAILED : |
| 1670 | atomic_inc(&port->erp_counter); |
| 1671 | if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) |
| 1672 | zfcp_erp_port_failed(port); |
| 1673 | break; |
| 1674 | case ZFCP_ERP_EXIT : |
| 1675 | /* nothing */ |
| 1676 | break; |
| 1677 | } |
| 1678 | |
| 1679 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { |
| 1680 | zfcp_erp_port_block(port, 0); /* for ZFCP_ERP_SUCCEEDED */ |
| 1681 | result = ZFCP_ERP_EXIT; |
| 1682 | } |
| 1683 | |
| 1684 | return result; |
| 1685 | } |
| 1686 | |
| 1687 | /* |
| 1688 | * function: |
| 1689 | * |
| 1690 | * purpose: |
| 1691 | * |
| 1692 | * returns: |
| 1693 | */ |
| 1694 | static int |
| 1695 | zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, int result) |
| 1696 | { |
| 1697 | debug_text_event(adapter->erp_dbf, 5, "a_stct"); |
| 1698 | |
| 1699 | switch (result) { |
| 1700 | case ZFCP_ERP_SUCCEEDED : |
| 1701 | atomic_set(&adapter->erp_counter, 0); |
| 1702 | zfcp_erp_adapter_unblock(adapter); |
| 1703 | break; |
| 1704 | case ZFCP_ERP_FAILED : |
| 1705 | atomic_inc(&adapter->erp_counter); |
| 1706 | if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) |
| 1707 | zfcp_erp_adapter_failed(adapter); |
| 1708 | break; |
| 1709 | case ZFCP_ERP_EXIT : |
| 1710 | /* nothing */ |
| 1711 | break; |
| 1712 | } |
| 1713 | |
| 1714 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { |
| 1715 | zfcp_erp_adapter_block(adapter, 0); /* for ZFCP_ERP_SUCCEEDED */ |
| 1716 | result = ZFCP_ERP_EXIT; |
| 1717 | } |
| 1718 | |
| 1719 | return result; |
| 1720 | } |
| 1721 | |
| 1722 | /* |
| 1723 | * function: |
| 1724 | * |
| 1725 | * purpose: remaining things in good cases, |
| 1726 | * escalation in bad cases |
| 1727 | * |
| 1728 | * returns: |
| 1729 | */ |
| 1730 | static int |
| 1731 | zfcp_erp_strategy_followup_actions(int action, |
| 1732 | struct zfcp_adapter *adapter, |
| 1733 | struct zfcp_port *port, |
| 1734 | struct zfcp_unit *unit, int status) |
| 1735 | { |
| 1736 | debug_text_event(adapter->erp_dbf, 5, "a_stfol"); |
| 1737 | debug_event(adapter->erp_dbf, 5, &action, sizeof (int)); |
| 1738 | |
| 1739 | /* initiate follow-up actions depending on success of finished action */ |
| 1740 | switch (action) { |
| 1741 | |
| 1742 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 1743 | if (status == ZFCP_ERP_SUCCEEDED) |
| 1744 | zfcp_erp_port_reopen_all_internal(adapter, 0); |
| 1745 | else |
| 1746 | zfcp_erp_adapter_reopen_internal(adapter, 0); |
| 1747 | break; |
| 1748 | |
| 1749 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 1750 | if (status == ZFCP_ERP_SUCCEEDED) |
| 1751 | zfcp_erp_port_reopen_internal(port, 0); |
| 1752 | else |
| 1753 | zfcp_erp_adapter_reopen_internal(adapter, 0); |
| 1754 | break; |
| 1755 | |
| 1756 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 1757 | if (status == ZFCP_ERP_SUCCEEDED) |
| 1758 | zfcp_erp_unit_reopen_all_internal(port, 0); |
| 1759 | else |
| 1760 | zfcp_erp_port_forced_reopen_internal(port, 0); |
| 1761 | break; |
| 1762 | |
| 1763 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 1764 | if (status == ZFCP_ERP_SUCCEEDED) ; /* no further action */ |
| 1765 | else |
| 1766 | zfcp_erp_port_reopen_internal(unit->port, 0); |
| 1767 | break; |
| 1768 | } |
| 1769 | |
| 1770 | return 0; |
| 1771 | } |
| 1772 | |
| 1773 | /* |
| 1774 | * function: |
| 1775 | * |
| 1776 | * purpose: |
| 1777 | * |
| 1778 | * returns: |
| 1779 | */ |
| 1780 | static int |
| 1781 | zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter) |
| 1782 | { |
| 1783 | unsigned long flags; |
| 1784 | |
| 1785 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 1786 | read_lock(&adapter->erp_lock); |
| 1787 | if (list_empty(&adapter->erp_ready_head) && |
| 1788 | list_empty(&adapter->erp_running_head)) { |
| 1789 | debug_text_event(adapter->erp_dbf, 4, "a_cq_wake"); |
| 1790 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, |
| 1791 | &adapter->status); |
| 1792 | wake_up(&adapter->erp_done_wqh); |
| 1793 | } else |
| 1794 | debug_text_event(adapter->erp_dbf, 5, "a_cq_notempty"); |
| 1795 | read_unlock(&adapter->erp_lock); |
| 1796 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 1797 | |
| 1798 | return 0; |
| 1799 | } |
| 1800 | |
| 1801 | /** |
| 1802 | * zfcp_erp_wait - wait for completion of error recovery on an adapter |
| 1803 | * @adapter: adapter for which to wait for completion of its error recovery |
| 1804 | * Return: 0 |
| 1805 | */ |
| 1806 | int |
| 1807 | zfcp_erp_wait(struct zfcp_adapter *adapter) |
| 1808 | { |
| 1809 | int retval = 0; |
| 1810 | |
| 1811 | wait_event(adapter->erp_done_wqh, |
| 1812 | !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, |
| 1813 | &adapter->status)); |
| 1814 | |
| 1815 | return retval; |
| 1816 | } |
| 1817 | |
| 1818 | /* |
| 1819 | * function: zfcp_erp_modify_adapter_status |
| 1820 | * |
| 1821 | * purpose: |
| 1822 | * |
| 1823 | */ |
| 1824 | void |
| 1825 | zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, |
| 1826 | u32 mask, int set_or_clear) |
| 1827 | { |
| 1828 | struct zfcp_port *port; |
| 1829 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
| 1830 | |
| 1831 | if (set_or_clear == ZFCP_SET) { |
| 1832 | atomic_set_mask(mask, &adapter->status); |
| 1833 | debug_text_event(adapter->erp_dbf, 3, "a_mod_as_s"); |
| 1834 | } else { |
| 1835 | atomic_clear_mask(mask, &adapter->status); |
| 1836 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) |
| 1837 | atomic_set(&adapter->erp_counter, 0); |
| 1838 | debug_text_event(adapter->erp_dbf, 3, "a_mod_as_c"); |
| 1839 | } |
| 1840 | debug_event(adapter->erp_dbf, 3, &mask, sizeof (u32)); |
| 1841 | |
| 1842 | /* Deal with all underlying devices, only pass common_mask */ |
| 1843 | if (common_mask) |
| 1844 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 1845 | zfcp_erp_modify_port_status(port, common_mask, |
| 1846 | set_or_clear); |
| 1847 | } |
| 1848 | |
| 1849 | /* |
| 1850 | * function: zfcp_erp_modify_port_status |
| 1851 | * |
| 1852 | * purpose: sets the port and all underlying devices to ERP_FAILED |
| 1853 | * |
| 1854 | */ |
| 1855 | void |
| 1856 | zfcp_erp_modify_port_status(struct zfcp_port *port, u32 mask, int set_or_clear) |
| 1857 | { |
| 1858 | struct zfcp_unit *unit; |
| 1859 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
| 1860 | |
| 1861 | if (set_or_clear == ZFCP_SET) { |
| 1862 | atomic_set_mask(mask, &port->status); |
| 1863 | debug_text_event(port->adapter->erp_dbf, 3, "p_mod_ps_s"); |
| 1864 | } else { |
| 1865 | atomic_clear_mask(mask, &port->status); |
| 1866 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) |
| 1867 | atomic_set(&port->erp_counter, 0); |
| 1868 | debug_text_event(port->adapter->erp_dbf, 3, "p_mod_ps_c"); |
| 1869 | } |
| 1870 | debug_event(port->adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); |
| 1871 | debug_event(port->adapter->erp_dbf, 3, &mask, sizeof (u32)); |
| 1872 | |
| 1873 | /* Modify status of all underlying devices, only pass common mask */ |
| 1874 | if (common_mask) |
| 1875 | list_for_each_entry(unit, &port->unit_list_head, list) |
| 1876 | zfcp_erp_modify_unit_status(unit, common_mask, |
| 1877 | set_or_clear); |
| 1878 | } |
| 1879 | |
| 1880 | /* |
| 1881 | * function: zfcp_erp_modify_unit_status |
| 1882 | * |
| 1883 | * purpose: sets the unit to ERP_FAILED |
| 1884 | * |
| 1885 | */ |
| 1886 | void |
| 1887 | zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u32 mask, int set_or_clear) |
| 1888 | { |
| 1889 | if (set_or_clear == ZFCP_SET) { |
| 1890 | atomic_set_mask(mask, &unit->status); |
| 1891 | debug_text_event(unit->port->adapter->erp_dbf, 3, "u_mod_us_s"); |
| 1892 | } else { |
| 1893 | atomic_clear_mask(mask, &unit->status); |
| 1894 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { |
| 1895 | atomic_set(&unit->erp_counter, 0); |
| 1896 | } |
| 1897 | debug_text_event(unit->port->adapter->erp_dbf, 3, "u_mod_us_c"); |
| 1898 | } |
| 1899 | debug_event(unit->port->adapter->erp_dbf, 3, &unit->fcp_lun, |
| 1900 | sizeof (fcp_lun_t)); |
| 1901 | debug_event(unit->port->adapter->erp_dbf, 3, &mask, sizeof (u32)); |
| 1902 | } |
| 1903 | |
| 1904 | /* |
| 1905 | * function: |
| 1906 | * |
| 1907 | * purpose: Wrappper for zfcp_erp_port_reopen_all_internal |
| 1908 | * used to ensure the correct locking |
| 1909 | * |
| 1910 | * returns: 0 - initiated action succesfully |
| 1911 | * <0 - failed to initiate action |
| 1912 | */ |
| 1913 | int |
| 1914 | zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, int clear_mask) |
| 1915 | { |
| 1916 | int retval; |
| 1917 | unsigned long flags; |
| 1918 | |
| 1919 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 1920 | write_lock(&adapter->erp_lock); |
| 1921 | retval = zfcp_erp_port_reopen_all_internal(adapter, clear_mask); |
| 1922 | write_unlock(&adapter->erp_lock); |
| 1923 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 1924 | |
| 1925 | return retval; |
| 1926 | } |
| 1927 | |
| 1928 | /* |
| 1929 | * function: |
| 1930 | * |
| 1931 | * purpose: |
| 1932 | * |
| 1933 | * returns: FIXME |
| 1934 | */ |
| 1935 | static int |
| 1936 | zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *adapter, int clear_mask) |
| 1937 | { |
| 1938 | int retval = 0; |
| 1939 | struct zfcp_port *port; |
| 1940 | |
| 1941 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 1942 | if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) |
| 1943 | zfcp_erp_port_reopen_internal(port, clear_mask); |
| 1944 | |
| 1945 | return retval; |
| 1946 | } |
| 1947 | |
| 1948 | /* |
| 1949 | * function: |
| 1950 | * |
| 1951 | * purpose: |
| 1952 | * |
| 1953 | * returns: FIXME |
| 1954 | */ |
| 1955 | static int |
| 1956 | zfcp_erp_unit_reopen_all_internal(struct zfcp_port *port, int clear_mask) |
| 1957 | { |
| 1958 | int retval = 0; |
| 1959 | struct zfcp_unit *unit; |
| 1960 | |
| 1961 | list_for_each_entry(unit, &port->unit_list_head, list) |
| 1962 | zfcp_erp_unit_reopen_internal(unit, clear_mask); |
| 1963 | |
| 1964 | return retval; |
| 1965 | } |
| 1966 | |
| 1967 | /* |
| 1968 | * function: |
| 1969 | * |
| 1970 | * purpose: this routine executes the 'Reopen Adapter' action |
| 1971 | * (the entire action is processed synchronously, since |
| 1972 | * there are no actions which might be run concurrently |
| 1973 | * per definition) |
| 1974 | * |
| 1975 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully |
| 1976 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 1977 | */ |
| 1978 | static int |
| 1979 | zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action) |
| 1980 | { |
| 1981 | int retval; |
| 1982 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1983 | |
| 1984 | retval = zfcp_erp_adapter_strategy_close(erp_action); |
| 1985 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
| 1986 | retval = ZFCP_ERP_EXIT; |
| 1987 | else |
| 1988 | retval = zfcp_erp_adapter_strategy_open(erp_action); |
| 1989 | |
| 1990 | debug_text_event(adapter->erp_dbf, 3, "a_ast/ret"); |
| 1991 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); |
| 1992 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); |
| 1993 | |
| 1994 | if (retval == ZFCP_ERP_FAILED) { |
| 1995 | ZFCP_LOG_INFO("Waiting to allow the adapter %s " |
| 1996 | "to recover itself\n", |
| 1997 | zfcp_get_busid_by_adapter(adapter)); |
| 1998 | msleep(jiffies_to_msecs(ZFCP_TYPE2_RECOVERY_TIME)); |
| 1999 | } |
| 2000 | |
| 2001 | return retval; |
| 2002 | } |
| 2003 | |
| 2004 | /* |
| 2005 | * function: |
| 2006 | * |
| 2007 | * purpose: |
| 2008 | * |
| 2009 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully |
| 2010 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2011 | */ |
| 2012 | static int |
| 2013 | zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *erp_action) |
| 2014 | { |
| 2015 | int retval; |
| 2016 | |
| 2017 | atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, |
| 2018 | &erp_action->adapter->status); |
| 2019 | retval = zfcp_erp_adapter_strategy_generic(erp_action, 1); |
| 2020 | atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, |
| 2021 | &erp_action->adapter->status); |
| 2022 | |
| 2023 | return retval; |
| 2024 | } |
| 2025 | |
| 2026 | /* |
| 2027 | * function: |
| 2028 | * |
| 2029 | * purpose: |
| 2030 | * |
| 2031 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully |
| 2032 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2033 | */ |
| 2034 | static int |
| 2035 | zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *erp_action) |
| 2036 | { |
| 2037 | int retval; |
| 2038 | |
| 2039 | atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, |
| 2040 | &erp_action->adapter->status); |
| 2041 | retval = zfcp_erp_adapter_strategy_generic(erp_action, 0); |
| 2042 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, |
| 2043 | &erp_action->adapter->status); |
| 2044 | |
| 2045 | return retval; |
| 2046 | } |
| 2047 | |
| 2048 | /* |
| 2049 | * function: zfcp_register_adapter |
| 2050 | * |
| 2051 | * purpose: allocate the irq associated with this devno and register |
| 2052 | * the FSF adapter with the SCSI stack |
| 2053 | * |
| 2054 | * returns: |
| 2055 | */ |
| 2056 | static int |
| 2057 | zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close) |
| 2058 | { |
| 2059 | int retval = ZFCP_ERP_SUCCEEDED; |
| 2060 | |
| 2061 | if (close) |
| 2062 | goto close_only; |
| 2063 | |
| 2064 | retval = zfcp_erp_adapter_strategy_open_qdio(erp_action); |
| 2065 | if (retval != ZFCP_ERP_SUCCEEDED) |
| 2066 | goto failed_qdio; |
| 2067 | |
| 2068 | retval = zfcp_erp_adapter_strategy_open_fsf(erp_action); |
| 2069 | if (retval != ZFCP_ERP_SUCCEEDED) |
| 2070 | goto failed_openfcp; |
| 2071 | |
| 2072 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &erp_action->adapter->status); |
| 2073 | goto out; |
| 2074 | |
| 2075 | close_only: |
| 2076 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, |
| 2077 | &erp_action->adapter->status); |
| 2078 | |
| 2079 | failed_openfcp: |
| 2080 | zfcp_erp_adapter_strategy_close_qdio(erp_action); |
| 2081 | zfcp_erp_adapter_strategy_close_fsf(erp_action); |
| 2082 | failed_qdio: |
| 2083 | out: |
| 2084 | return retval; |
| 2085 | } |
| 2086 | |
| 2087 | /* |
| 2088 | * function: zfcp_qdio_init |
| 2089 | * |
| 2090 | * purpose: setup QDIO operation for specified adapter |
| 2091 | * |
| 2092 | * returns: 0 - successful setup |
| 2093 | * !0 - failed setup |
| 2094 | */ |
| 2095 | int |
| 2096 | zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action) |
| 2097 | { |
| 2098 | int retval; |
| 2099 | int i; |
| 2100 | volatile struct qdio_buffer_element *sbale; |
| 2101 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2102 | |
| 2103 | if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { |
| 2104 | ZFCP_LOG_NORMAL("bug: second attempt to set up QDIO on " |
| 2105 | "adapter %s\n", |
| 2106 | zfcp_get_busid_by_adapter(adapter)); |
| 2107 | goto failed_sanity; |
| 2108 | } |
| 2109 | |
| 2110 | if (qdio_establish(&adapter->qdio_init_data) != 0) { |
| 2111 | ZFCP_LOG_INFO("error: establishment of QDIO queues failed " |
| 2112 | "on adapter %s\n", |
| 2113 | zfcp_get_busid_by_adapter(adapter)); |
| 2114 | goto failed_qdio_establish; |
| 2115 | } |
| 2116 | debug_text_event(adapter->erp_dbf, 3, "qdio_est"); |
| 2117 | |
| 2118 | if (qdio_activate(adapter->ccw_device, 0) != 0) { |
| 2119 | ZFCP_LOG_INFO("error: activation of QDIO queues failed " |
| 2120 | "on adapter %s\n", |
| 2121 | zfcp_get_busid_by_adapter(adapter)); |
| 2122 | goto failed_qdio_activate; |
| 2123 | } |
| 2124 | debug_text_event(adapter->erp_dbf, 3, "qdio_act"); |
| 2125 | |
| 2126 | /* |
| 2127 | * put buffers into response queue, |
| 2128 | */ |
| 2129 | for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { |
| 2130 | sbale = &(adapter->response_queue.buffer[i]->element[0]); |
| 2131 | sbale->length = 0; |
| 2132 | sbale->flags = SBAL_FLAGS_LAST_ENTRY; |
| 2133 | sbale->addr = 0; |
| 2134 | } |
| 2135 | |
| 2136 | ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " |
| 2137 | "queue_no=%i, index_in_queue=%i, count=%i)\n", |
| 2138 | zfcp_get_busid_by_adapter(adapter), |
| 2139 | QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q); |
| 2140 | |
| 2141 | retval = do_QDIO(adapter->ccw_device, |
| 2142 | QDIO_FLAG_SYNC_INPUT, |
| 2143 | 0, 0, QDIO_MAX_BUFFERS_PER_Q, NULL); |
| 2144 | |
| 2145 | if (retval) { |
| 2146 | ZFCP_LOG_NORMAL("bug: setup of QDIO failed (retval=%d)\n", |
| 2147 | retval); |
| 2148 | goto failed_do_qdio; |
| 2149 | } else { |
| 2150 | adapter->response_queue.free_index = 0; |
| 2151 | atomic_set(&adapter->response_queue.free_count, 0); |
| 2152 | ZFCP_LOG_DEBUG("%i buffers successfully enqueued to " |
| 2153 | "response queue\n", QDIO_MAX_BUFFERS_PER_Q); |
| 2154 | } |
| 2155 | /* set index of first avalable SBALS / number of available SBALS */ |
| 2156 | adapter->request_queue.free_index = 0; |
| 2157 | atomic_set(&adapter->request_queue.free_count, QDIO_MAX_BUFFERS_PER_Q); |
| 2158 | adapter->request_queue.distance_from_int = 0; |
| 2159 | |
| 2160 | /* initialize waitqueue used to wait for free SBALs in requests queue */ |
| 2161 | init_waitqueue_head(&adapter->request_wq); |
| 2162 | |
| 2163 | /* ok, we did it - skip all cleanups for different failures */ |
| 2164 | atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); |
| 2165 | retval = ZFCP_ERP_SUCCEEDED; |
| 2166 | goto out; |
| 2167 | |
| 2168 | failed_do_qdio: |
| 2169 | /* NOP */ |
| 2170 | |
| 2171 | failed_qdio_activate: |
| 2172 | debug_text_event(adapter->erp_dbf, 3, "qdio_down1a"); |
| 2173 | while (qdio_shutdown(adapter->ccw_device, |
| 2174 | QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) |
| 2175 | msleep(1000); |
| 2176 | debug_text_event(adapter->erp_dbf, 3, "qdio_down1b"); |
| 2177 | |
| 2178 | failed_qdio_establish: |
| 2179 | failed_sanity: |
| 2180 | retval = ZFCP_ERP_FAILED; |
| 2181 | |
| 2182 | out: |
| 2183 | return retval; |
| 2184 | } |
| 2185 | |
| 2186 | /* |
| 2187 | * function: zfcp_qdio_cleanup |
| 2188 | * |
| 2189 | * purpose: cleans up QDIO operation for the specified adapter |
| 2190 | * |
| 2191 | * returns: 0 - successful cleanup |
| 2192 | * !0 - failed cleanup |
| 2193 | */ |
| 2194 | int |
| 2195 | zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *erp_action) |
| 2196 | { |
| 2197 | int retval = ZFCP_ERP_SUCCEEDED; |
| 2198 | int first_used; |
| 2199 | int used_count; |
| 2200 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2201 | |
| 2202 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { |
| 2203 | ZFCP_LOG_DEBUG("error: attempt to shut down inactive QDIO " |
| 2204 | "queues on adapter %s\n", |
| 2205 | zfcp_get_busid_by_adapter(adapter)); |
| 2206 | retval = ZFCP_ERP_FAILED; |
| 2207 | goto out; |
| 2208 | } |
| 2209 | |
| 2210 | /* |
| 2211 | * Get queue_lock and clear QDIOUP flag. Thus it's guaranteed that |
| 2212 | * do_QDIO won't be called while qdio_shutdown is in progress. |
| 2213 | */ |
| 2214 | |
| 2215 | write_lock_irq(&adapter->request_queue.queue_lock); |
| 2216 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); |
| 2217 | write_unlock_irq(&adapter->request_queue.queue_lock); |
| 2218 | |
| 2219 | debug_text_event(adapter->erp_dbf, 3, "qdio_down2a"); |
| 2220 | while (qdio_shutdown(adapter->ccw_device, |
| 2221 | QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) |
| 2222 | msleep(1000); |
| 2223 | debug_text_event(adapter->erp_dbf, 3, "qdio_down2b"); |
| 2224 | |
| 2225 | /* |
| 2226 | * First we had to stop QDIO operation. |
| 2227 | * Now it is safe to take the following actions. |
| 2228 | */ |
| 2229 | |
| 2230 | /* Cleanup only necessary when there are unacknowledged buffers */ |
| 2231 | if (atomic_read(&adapter->request_queue.free_count) |
| 2232 | < QDIO_MAX_BUFFERS_PER_Q) { |
| 2233 | first_used = (adapter->request_queue.free_index + |
| 2234 | atomic_read(&adapter->request_queue.free_count)) |
| 2235 | % QDIO_MAX_BUFFERS_PER_Q; |
| 2236 | used_count = QDIO_MAX_BUFFERS_PER_Q - |
| 2237 | atomic_read(&adapter->request_queue.free_count); |
| 2238 | zfcp_qdio_zero_sbals(adapter->request_queue.buffer, |
| 2239 | first_used, used_count); |
| 2240 | } |
| 2241 | adapter->response_queue.free_index = 0; |
| 2242 | atomic_set(&adapter->response_queue.free_count, 0); |
| 2243 | adapter->request_queue.free_index = 0; |
| 2244 | atomic_set(&adapter->request_queue.free_count, 0); |
| 2245 | adapter->request_queue.distance_from_int = 0; |
| 2246 | out: |
| 2247 | return retval; |
| 2248 | } |
| 2249 | |
| 2250 | /* |
| 2251 | * function: zfcp_fsf_init |
| 2252 | * |
| 2253 | * purpose: initializes FSF operation for the specified adapter |
| 2254 | * |
| 2255 | * returns: 0 - succesful initialization of FSF operation |
| 2256 | * !0 - failed to initialize FSF operation |
| 2257 | */ |
| 2258 | static int |
| 2259 | zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action) |
| 2260 | { |
| 2261 | int retval; |
| 2262 | |
| 2263 | /* do 'exchange configuration data' */ |
| 2264 | retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action); |
| 2265 | if (retval == ZFCP_ERP_FAILED) |
| 2266 | return retval; |
| 2267 | |
| 2268 | /* start the desired number of Status Reads */ |
| 2269 | retval = zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action); |
| 2270 | return retval; |
| 2271 | } |
| 2272 | |
| 2273 | /* |
| 2274 | * function: |
| 2275 | * |
| 2276 | * purpose: |
| 2277 | * |
| 2278 | * returns: |
| 2279 | */ |
| 2280 | static int |
| 2281 | zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) |
| 2282 | { |
| 2283 | int retval = ZFCP_ERP_SUCCEEDED; |
| 2284 | int retries; |
Andreas Herrmann | 22753fa | 2005-06-13 13:15:15 +0200 | [diff] [blame] | 2285 | int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2287 | |
| 2288 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | |
Andreas Herrmann | 22753fa | 2005-06-13 13:15:15 +0200 | [diff] [blame] | 2290 | for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
| 2292 | &adapter->status); |
| 2293 | ZFCP_LOG_DEBUG("Doing exchange config data\n"); |
| 2294 | zfcp_erp_action_to_running(erp_action); |
| 2295 | zfcp_erp_timeout_init(erp_action); |
| 2296 | if (zfcp_fsf_exchange_config_data(erp_action)) { |
| 2297 | retval = ZFCP_ERP_FAILED; |
| 2298 | debug_text_event(adapter->erp_dbf, 5, "a_fstx_xf"); |
| 2299 | ZFCP_LOG_INFO("error: initiation of exchange of " |
| 2300 | "configuration data failed for " |
| 2301 | "adapter %s\n", |
| 2302 | zfcp_get_busid_by_adapter(adapter)); |
| 2303 | break; |
| 2304 | } |
| 2305 | debug_text_event(adapter->erp_dbf, 6, "a_fstx_xok"); |
| 2306 | ZFCP_LOG_DEBUG("Xchange underway\n"); |
| 2307 | |
| 2308 | /* |
| 2309 | * Why this works: |
| 2310 | * Both the normal completion handler as well as the timeout |
| 2311 | * handler will do an 'up' when the 'exchange config data' |
| 2312 | * request completes or times out. Thus, the signal to go on |
| 2313 | * won't be lost utilizing this semaphore. |
| 2314 | * Furthermore, this 'adapter_reopen' action is |
| 2315 | * guaranteed to be the only action being there (highest action |
| 2316 | * which prevents other actions from being created). |
| 2317 | * Resulting from that, the wake signal recognized here |
| 2318 | * _must_ be the one belonging to the 'exchange config |
| 2319 | * data' request. |
| 2320 | */ |
| 2321 | down(&adapter->erp_ready_sem); |
| 2322 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
| 2323 | ZFCP_LOG_INFO("error: exchange of configuration data " |
| 2324 | "for adapter %s timed out\n", |
| 2325 | zfcp_get_busid_by_adapter(adapter)); |
| 2326 | break; |
| 2327 | } |
Andreas Herrmann | 22753fa | 2005-06-13 13:15:15 +0200 | [diff] [blame] | 2328 | |
| 2329 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
| 2330 | &adapter->status)) |
| 2331 | break; |
| 2332 | |
| 2333 | ZFCP_LOG_DEBUG("host connection still initialising... " |
| 2334 | "waiting and retrying...\n"); |
| 2335 | /* sleep a little bit before retry */ |
| 2336 | msleep(jiffies_to_msecs(sleep)); |
| 2337 | sleep *= 2; |
| 2338 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | |
| 2340 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, |
| 2341 | &adapter->status)) { |
| 2342 | ZFCP_LOG_INFO("error: exchange of configuration data for " |
| 2343 | "adapter %s failed\n", |
| 2344 | zfcp_get_busid_by_adapter(adapter)); |
| 2345 | retval = ZFCP_ERP_FAILED; |
| 2346 | } |
| 2347 | |
| 2348 | return retval; |
| 2349 | } |
| 2350 | |
| 2351 | /* |
| 2352 | * function: |
| 2353 | * |
| 2354 | * purpose: |
| 2355 | * |
| 2356 | * returns: |
| 2357 | */ |
| 2358 | static int |
| 2359 | zfcp_erp_adapter_strategy_open_fsf_statusread(struct zfcp_erp_action |
| 2360 | *erp_action) |
| 2361 | { |
| 2362 | int retval = ZFCP_ERP_SUCCEEDED; |
| 2363 | int temp_ret; |
| 2364 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2365 | int i; |
| 2366 | |
| 2367 | adapter->status_read_failed = 0; |
| 2368 | for (i = 0; i < ZFCP_STATUS_READS_RECOM; i++) { |
| 2369 | temp_ret = zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL); |
| 2370 | if (temp_ret < 0) { |
| 2371 | ZFCP_LOG_INFO("error: set-up of unsolicited status " |
| 2372 | "notification failed on adapter %s\n", |
| 2373 | zfcp_get_busid_by_adapter(adapter)); |
| 2374 | retval = ZFCP_ERP_FAILED; |
| 2375 | i--; |
| 2376 | break; |
| 2377 | } |
| 2378 | } |
| 2379 | |
| 2380 | return retval; |
| 2381 | } |
| 2382 | |
| 2383 | /* |
| 2384 | * function: zfcp_fsf_cleanup |
| 2385 | * |
| 2386 | * purpose: cleanup FSF operation for specified adapter |
| 2387 | * |
| 2388 | * returns: 0 - FSF operation successfully cleaned up |
| 2389 | * !0 - failed to cleanup FSF operation for this adapter |
| 2390 | */ |
| 2391 | static int |
| 2392 | zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *erp_action) |
| 2393 | { |
| 2394 | int retval = ZFCP_ERP_SUCCEEDED; |
| 2395 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2396 | |
| 2397 | /* |
| 2398 | * wake waiting initiators of requests, |
| 2399 | * return SCSI commands (with error status), |
| 2400 | * clean up all requests (synchronously) |
| 2401 | */ |
| 2402 | zfcp_fsf_req_dismiss_all(adapter); |
| 2403 | /* reset FSF request sequence number */ |
| 2404 | adapter->fsf_req_seq_no = 0; |
| 2405 | /* all ports and units are closed */ |
| 2406 | zfcp_erp_modify_adapter_status(adapter, |
| 2407 | ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); |
| 2408 | |
| 2409 | return retval; |
| 2410 | } |
| 2411 | |
| 2412 | /* |
| 2413 | * function: |
| 2414 | * |
| 2415 | * purpose: this routine executes the 'Reopen Physical Port' action |
| 2416 | * |
| 2417 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2418 | * ZFCP_ERP_SUCCEEDED - action finished successfully |
| 2419 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2420 | */ |
| 2421 | static int |
| 2422 | zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) |
| 2423 | { |
| 2424 | int retval = ZFCP_ERP_FAILED; |
| 2425 | struct zfcp_port *port = erp_action->port; |
| 2426 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2427 | |
| 2428 | switch (erp_action->step) { |
| 2429 | |
| 2430 | /* |
| 2431 | * FIXME: |
| 2432 | * the ULP spec. begs for waiting for oustanding commands |
| 2433 | */ |
| 2434 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2435 | zfcp_erp_port_strategy_clearstati(port); |
| 2436 | /* |
| 2437 | * it would be sufficient to test only the normal open flag |
| 2438 | * since the phys. open flag cannot be set if the normal |
| 2439 | * open flag is unset - however, this is for readabilty ... |
| 2440 | */ |
| 2441 | if (atomic_test_mask((ZFCP_STATUS_PORT_PHYS_OPEN | |
| 2442 | ZFCP_STATUS_COMMON_OPEN), |
| 2443 | &port->status)) { |
| 2444 | ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " |
| 2445 | "close physical\n", port->wwpn); |
| 2446 | retval = |
| 2447 | zfcp_erp_port_forced_strategy_close(erp_action); |
| 2448 | } else |
| 2449 | retval = ZFCP_ERP_FAILED; |
| 2450 | break; |
| 2451 | |
| 2452 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: |
| 2453 | if (atomic_test_mask(ZFCP_STATUS_PORT_PHYS_OPEN, |
| 2454 | &port->status)) { |
| 2455 | ZFCP_LOG_DEBUG("close physical failed for port " |
| 2456 | "0x%016Lx\n", port->wwpn); |
| 2457 | retval = ZFCP_ERP_FAILED; |
| 2458 | } else |
| 2459 | retval = ZFCP_ERP_SUCCEEDED; |
| 2460 | break; |
| 2461 | } |
| 2462 | |
| 2463 | debug_text_event(adapter->erp_dbf, 3, "p_pfst/ret"); |
| 2464 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); |
| 2465 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); |
| 2466 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); |
| 2467 | |
| 2468 | return retval; |
| 2469 | } |
| 2470 | |
| 2471 | /* |
| 2472 | * function: |
| 2473 | * |
| 2474 | * purpose: this routine executes the 'Reopen Port' action |
| 2475 | * |
| 2476 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2477 | * ZFCP_ERP_SUCCEEDED - action finished successfully |
| 2478 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2479 | */ |
| 2480 | static int |
| 2481 | zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) |
| 2482 | { |
| 2483 | int retval = ZFCP_ERP_FAILED; |
| 2484 | struct zfcp_port *port = erp_action->port; |
| 2485 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2486 | |
| 2487 | switch (erp_action->step) { |
| 2488 | |
| 2489 | /* |
| 2490 | * FIXME: |
| 2491 | * the ULP spec. begs for waiting for oustanding commands |
| 2492 | */ |
| 2493 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2494 | zfcp_erp_port_strategy_clearstati(port); |
| 2495 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { |
| 2496 | ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " |
| 2497 | "close\n", port->wwpn); |
| 2498 | retval = zfcp_erp_port_strategy_close(erp_action); |
| 2499 | goto out; |
| 2500 | } /* else it's already closed, open it */ |
| 2501 | break; |
| 2502 | |
| 2503 | case ZFCP_ERP_STEP_PORT_CLOSING: |
| 2504 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { |
| 2505 | ZFCP_LOG_DEBUG("close failed for port 0x%016Lx\n", |
| 2506 | port->wwpn); |
| 2507 | retval = ZFCP_ERP_FAILED; |
| 2508 | goto out; |
| 2509 | } /* else it's closed now, open it */ |
| 2510 | break; |
| 2511 | } |
| 2512 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
| 2513 | retval = ZFCP_ERP_EXIT; |
| 2514 | else |
| 2515 | retval = zfcp_erp_port_strategy_open(erp_action); |
| 2516 | |
| 2517 | out: |
| 2518 | debug_text_event(adapter->erp_dbf, 3, "p_pst/ret"); |
| 2519 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); |
| 2520 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); |
| 2521 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); |
| 2522 | |
| 2523 | return retval; |
| 2524 | } |
| 2525 | |
| 2526 | /* |
| 2527 | * function: |
| 2528 | * |
| 2529 | * purpose: |
| 2530 | * |
| 2531 | * returns: |
| 2532 | */ |
| 2533 | static int |
| 2534 | zfcp_erp_port_strategy_open(struct zfcp_erp_action *erp_action) |
| 2535 | { |
| 2536 | int retval; |
| 2537 | |
| 2538 | if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, |
| 2539 | &erp_action->port->status)) |
| 2540 | retval = zfcp_erp_port_strategy_open_nameserver(erp_action); |
| 2541 | else |
| 2542 | retval = zfcp_erp_port_strategy_open_common(erp_action); |
| 2543 | |
| 2544 | return retval; |
| 2545 | } |
| 2546 | |
| 2547 | /* |
| 2548 | * function: |
| 2549 | * |
| 2550 | * purpose: |
| 2551 | * |
| 2552 | * returns: |
| 2553 | * |
| 2554 | * FIXME(design): currently only prepared for fabric (nameserver!) |
| 2555 | */ |
| 2556 | static int |
| 2557 | zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *erp_action) |
| 2558 | { |
| 2559 | int retval = 0; |
| 2560 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2561 | struct zfcp_port *port = erp_action->port; |
| 2562 | |
| 2563 | switch (erp_action->step) { |
| 2564 | |
| 2565 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2566 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: |
| 2567 | case ZFCP_ERP_STEP_PORT_CLOSING: |
| 6f71d9b | 2005-04-10 23:04:28 -0500 | [diff] [blame] | 2568 | if (adapter->fc_topology == FSF_TOPO_P2P) { |
| 2569 | if (port->wwpn != adapter->peer_wwpn) { |
| 2570 | ZFCP_LOG_NORMAL("Failed to open port 0x%016Lx " |
| 2571 | "on adapter %s.\nPeer WWPN " |
| 2572 | "0x%016Lx does not match\n", |
| 2573 | port->wwpn, |
| 2574 | zfcp_get_busid_by_adapter(adapter), |
| 2575 | adapter->peer_wwpn); |
| 2576 | zfcp_erp_port_failed(port); |
| 2577 | retval = ZFCP_ERP_FAILED; |
| 2578 | break; |
| 2579 | } |
| 2580 | port->d_id = adapter->peer_d_id; |
| 2581 | atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); |
| 2582 | retval = zfcp_erp_port_strategy_open_port(erp_action); |
| 2583 | break; |
| 2584 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2585 | if (!(adapter->nameserver_port)) { |
| 2586 | retval = zfcp_nameserver_enqueue(adapter); |
| 2587 | if (retval != 0) { |
| 2588 | ZFCP_LOG_NORMAL("error: nameserver port " |
| 2589 | "unavailable for adapter %s\n", |
| 2590 | zfcp_get_busid_by_adapter(adapter)); |
| 2591 | retval = ZFCP_ERP_FAILED; |
| 2592 | break; |
| 2593 | } |
| 2594 | } |
| 2595 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| 2596 | &adapter->nameserver_port->status)) { |
| 2597 | ZFCP_LOG_DEBUG("nameserver port is not open -> open " |
| 2598 | "nameserver port\n"); |
| 2599 | /* nameserver port may live again */ |
| 2600 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, |
| 2601 | &adapter->nameserver_port->status); |
| 2602 | if (zfcp_erp_port_reopen(adapter->nameserver_port, 0) |
| 2603 | >= 0) { |
| 2604 | erp_action->step = |
| 2605 | ZFCP_ERP_STEP_NAMESERVER_OPEN; |
| 2606 | retval = ZFCP_ERP_CONTINUES; |
| 2607 | } else |
| 2608 | retval = ZFCP_ERP_FAILED; |
| 2609 | break; |
| 2610 | } |
| 2611 | /* else nameserver port is already open, fall through */ |
| 2612 | case ZFCP_ERP_STEP_NAMESERVER_OPEN: |
| 2613 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, |
| 2614 | &adapter->nameserver_port->status)) { |
| 2615 | ZFCP_LOG_DEBUG("open failed for nameserver port\n"); |
| 2616 | retval = ZFCP_ERP_FAILED; |
| 2617 | } else { |
| 2618 | ZFCP_LOG_DEBUG("nameserver port is open -> " |
| 2619 | "nameserver look-up for port 0x%016Lx\n", |
| 2620 | port->wwpn); |
| 2621 | retval = zfcp_erp_port_strategy_open_common_lookup |
| 2622 | (erp_action); |
| 2623 | } |
| 2624 | break; |
| 2625 | |
| 2626 | case ZFCP_ERP_STEP_NAMESERVER_LOOKUP: |
| 2627 | if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) { |
| 2628 | if (atomic_test_mask |
| 2629 | (ZFCP_STATUS_PORT_INVALID_WWPN, &port->status)) { |
| 2630 | ZFCP_LOG_DEBUG("nameserver look-up failed " |
| 2631 | "for port 0x%016Lx " |
| 2632 | "(misconfigured WWPN?)\n", |
| 2633 | port->wwpn); |
| 2634 | zfcp_erp_port_failed(port); |
| 2635 | retval = ZFCP_ERP_EXIT; |
| 2636 | } else { |
| 2637 | ZFCP_LOG_DEBUG("nameserver look-up failed for " |
| 2638 | "port 0x%016Lx\n", port->wwpn); |
| 2639 | retval = ZFCP_ERP_FAILED; |
| 2640 | } |
| 2641 | } else { |
| 2642 | ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%08x -> " |
| 2643 | "trying open\n", port->wwpn, port->d_id); |
| 2644 | retval = zfcp_erp_port_strategy_open_port(erp_action); |
| 2645 | } |
| 2646 | break; |
| 2647 | |
| 2648 | case ZFCP_ERP_STEP_PORT_OPENING: |
| 2649 | /* D_ID might have changed during open */ |
| 2650 | if (atomic_test_mask((ZFCP_STATUS_COMMON_OPEN | |
| 2651 | ZFCP_STATUS_PORT_DID_DID), |
| 2652 | &port->status)) { |
| 2653 | ZFCP_LOG_DEBUG("port 0x%016Lx is open\n", port->wwpn); |
| 2654 | retval = ZFCP_ERP_SUCCEEDED; |
| 2655 | } else { |
| 2656 | ZFCP_LOG_DEBUG("open failed for port 0x%016Lx\n", |
| 2657 | port->wwpn); |
| 2658 | retval = ZFCP_ERP_FAILED; |
| 2659 | } |
| 2660 | break; |
| 2661 | |
| 2662 | default: |
| 2663 | ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", |
| 2664 | erp_action->step); |
| 2665 | retval = ZFCP_ERP_FAILED; |
| 2666 | } |
| 2667 | |
| 2668 | return retval; |
| 2669 | } |
| 2670 | |
| 2671 | /* |
| 2672 | * function: |
| 2673 | * |
| 2674 | * purpose: |
| 2675 | * |
| 2676 | * returns: |
| 2677 | */ |
| 2678 | static int |
| 2679 | zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *erp_action) |
| 2680 | { |
| 2681 | int retval; |
| 2682 | struct zfcp_port *port = erp_action->port; |
| 2683 | |
| 2684 | switch (erp_action->step) { |
| 2685 | |
| 2686 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2687 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: |
| 2688 | case ZFCP_ERP_STEP_PORT_CLOSING: |
| 2689 | ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%08x -> trying open\n", |
| 2690 | port->wwpn, port->d_id); |
| 2691 | retval = zfcp_erp_port_strategy_open_port(erp_action); |
| 2692 | break; |
| 2693 | |
| 2694 | case ZFCP_ERP_STEP_PORT_OPENING: |
| 2695 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { |
| 2696 | ZFCP_LOG_DEBUG("WKA port is open\n"); |
| 2697 | retval = ZFCP_ERP_SUCCEEDED; |
| 2698 | } else { |
| 2699 | ZFCP_LOG_DEBUG("open failed for WKA port\n"); |
| 2700 | retval = ZFCP_ERP_FAILED; |
| 2701 | } |
| 2702 | /* this is needed anyway (dont care for retval of wakeup) */ |
| 2703 | ZFCP_LOG_DEBUG("continue other open port operations\n"); |
| 2704 | zfcp_erp_port_strategy_open_nameserver_wakeup(erp_action); |
| 2705 | break; |
| 2706 | |
| 2707 | default: |
| 2708 | ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", |
| 2709 | erp_action->step); |
| 2710 | retval = ZFCP_ERP_FAILED; |
| 2711 | } |
| 2712 | |
| 2713 | return retval; |
| 2714 | } |
| 2715 | |
| 2716 | /* |
| 2717 | * function: |
| 2718 | * |
| 2719 | * purpose: makes the erp thread continue with reopen (physical) port |
| 2720 | * actions which have been paused until the name server port |
| 2721 | * is opened (or failed) |
| 2722 | * |
| 2723 | * returns: 0 (a kind of void retval, its not used) |
| 2724 | */ |
| 2725 | static int |
| 2726 | zfcp_erp_port_strategy_open_nameserver_wakeup(struct zfcp_erp_action |
| 2727 | *ns_erp_action) |
| 2728 | { |
| 2729 | int retval = 0; |
| 2730 | unsigned long flags; |
| 2731 | struct zfcp_adapter *adapter = ns_erp_action->adapter; |
| 2732 | struct zfcp_erp_action *erp_action, *tmp; |
| 2733 | |
| 2734 | read_lock_irqsave(&adapter->erp_lock, flags); |
| 2735 | list_for_each_entry_safe(erp_action, tmp, &adapter->erp_running_head, |
| 2736 | list) { |
| 2737 | debug_text_event(adapter->erp_dbf, 4, "p_pstnsw_n"); |
| 2738 | debug_event(adapter->erp_dbf, 4, &erp_action->port->wwpn, |
| 2739 | sizeof (wwn_t)); |
| 2740 | if (erp_action->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) { |
| 2741 | debug_text_event(adapter->erp_dbf, 3, "p_pstnsw_w"); |
| 2742 | debug_event(adapter->erp_dbf, 3, |
| 2743 | &erp_action->port->wwpn, sizeof (wwn_t)); |
| 2744 | if (atomic_test_mask( |
| 2745 | ZFCP_STATUS_COMMON_ERP_FAILED, |
| 2746 | &adapter->nameserver_port->status)) |
| 2747 | zfcp_erp_port_failed(erp_action->port); |
| 2748 | zfcp_erp_action_ready(erp_action); |
| 2749 | } |
| 2750 | } |
| 2751 | read_unlock_irqrestore(&adapter->erp_lock, flags); |
| 2752 | |
| 2753 | return retval; |
| 2754 | } |
| 2755 | |
| 2756 | /* |
| 2757 | * function: |
| 2758 | * |
| 2759 | * purpose: |
| 2760 | * |
| 2761 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2762 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2763 | */ |
| 2764 | static int |
| 2765 | zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *erp_action) |
| 2766 | { |
| 2767 | int retval; |
| 2768 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2769 | struct zfcp_port *port = erp_action->port; |
| 2770 | |
| 2771 | zfcp_erp_timeout_init(erp_action); |
| 2772 | retval = zfcp_fsf_close_physical_port(erp_action); |
| 2773 | if (retval == -ENOMEM) { |
| 2774 | debug_text_event(adapter->erp_dbf, 5, "o_pfstc_nomem"); |
| 2775 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2776 | retval = ZFCP_ERP_NOMEM; |
| 2777 | goto out; |
| 2778 | } |
| 2779 | erp_action->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; |
| 2780 | if (retval != 0) { |
| 2781 | debug_text_event(adapter->erp_dbf, 5, "o_pfstc_cpf"); |
| 2782 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2783 | /* could not send 'open', fail */ |
| 2784 | retval = ZFCP_ERP_FAILED; |
| 2785 | goto out; |
| 2786 | } |
| 2787 | debug_text_event(adapter->erp_dbf, 6, "o_pfstc_cpok"); |
| 2788 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 2789 | retval = ZFCP_ERP_CONTINUES; |
| 2790 | out: |
| 2791 | return retval; |
| 2792 | } |
| 2793 | |
| 2794 | /* |
| 2795 | * function: |
| 2796 | * |
| 2797 | * purpose: |
| 2798 | * |
| 2799 | * returns: |
| 2800 | */ |
| 2801 | static int |
| 2802 | zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) |
| 2803 | { |
| 2804 | int retval = 0; |
| 2805 | struct zfcp_adapter *adapter = port->adapter; |
| 2806 | |
| 2807 | debug_text_event(adapter->erp_dbf, 5, "p_pstclst"); |
| 2808 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2809 | |
| 2810 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | |
| 2811 | ZFCP_STATUS_COMMON_CLOSING | |
| 2812 | ZFCP_STATUS_COMMON_ACCESS_DENIED | |
| 2813 | ZFCP_STATUS_PORT_DID_DID | |
| 2814 | ZFCP_STATUS_PORT_PHYS_CLOSING | |
| 2815 | ZFCP_STATUS_PORT_INVALID_WWPN, |
| 2816 | &port->status); |
| 2817 | return retval; |
| 2818 | } |
| 2819 | |
| 2820 | /* |
| 2821 | * function: |
| 2822 | * |
| 2823 | * purpose: |
| 2824 | * |
| 2825 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2826 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2827 | */ |
| 2828 | static int |
| 2829 | zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) |
| 2830 | { |
| 2831 | int retval; |
| 2832 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2833 | struct zfcp_port *port = erp_action->port; |
| 2834 | |
| 2835 | zfcp_erp_timeout_init(erp_action); |
| 2836 | retval = zfcp_fsf_close_port(erp_action); |
| 2837 | if (retval == -ENOMEM) { |
| 2838 | debug_text_event(adapter->erp_dbf, 5, "p_pstc_nomem"); |
| 2839 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2840 | retval = ZFCP_ERP_NOMEM; |
| 2841 | goto out; |
| 2842 | } |
| 2843 | erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; |
| 2844 | if (retval != 0) { |
| 2845 | debug_text_event(adapter->erp_dbf, 5, "p_pstc_cpf"); |
| 2846 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2847 | /* could not send 'close', fail */ |
| 2848 | retval = ZFCP_ERP_FAILED; |
| 2849 | goto out; |
| 2850 | } |
| 2851 | debug_text_event(adapter->erp_dbf, 6, "p_pstc_cpok"); |
| 2852 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 2853 | retval = ZFCP_ERP_CONTINUES; |
| 2854 | out: |
| 2855 | return retval; |
| 2856 | } |
| 2857 | |
| 2858 | /* |
| 2859 | * function: |
| 2860 | * |
| 2861 | * purpose: |
| 2862 | * |
| 2863 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2864 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2865 | */ |
| 2866 | static int |
| 2867 | zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) |
| 2868 | { |
| 2869 | int retval; |
| 2870 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2871 | struct zfcp_port *port = erp_action->port; |
| 2872 | |
| 2873 | zfcp_erp_timeout_init(erp_action); |
| 2874 | retval = zfcp_fsf_open_port(erp_action); |
| 2875 | if (retval == -ENOMEM) { |
| 2876 | debug_text_event(adapter->erp_dbf, 5, "p_psto_nomem"); |
| 2877 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2878 | retval = ZFCP_ERP_NOMEM; |
| 2879 | goto out; |
| 2880 | } |
| 2881 | erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; |
| 2882 | if (retval != 0) { |
| 2883 | debug_text_event(adapter->erp_dbf, 5, "p_psto_opf"); |
| 2884 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2885 | /* could not send 'open', fail */ |
| 2886 | retval = ZFCP_ERP_FAILED; |
| 2887 | goto out; |
| 2888 | } |
| 2889 | debug_text_event(adapter->erp_dbf, 6, "p_psto_opok"); |
| 2890 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 2891 | retval = ZFCP_ERP_CONTINUES; |
| 2892 | out: |
| 2893 | return retval; |
| 2894 | } |
| 2895 | |
| 2896 | /* |
| 2897 | * function: |
| 2898 | * |
| 2899 | * purpose: |
| 2900 | * |
| 2901 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2902 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2903 | */ |
| 2904 | static int |
| 2905 | zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *erp_action) |
| 2906 | { |
| 2907 | int retval; |
| 2908 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2909 | struct zfcp_port *port = erp_action->port; |
| 2910 | |
| 2911 | zfcp_erp_timeout_init(erp_action); |
| 2912 | retval = zfcp_ns_gid_pn_request(erp_action); |
| 2913 | if (retval == -ENOMEM) { |
| 2914 | debug_text_event(adapter->erp_dbf, 5, "p_pstn_nomem"); |
| 2915 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2916 | retval = ZFCP_ERP_NOMEM; |
| 2917 | goto out; |
| 2918 | } |
| 2919 | erp_action->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP; |
| 2920 | if (retval != 0) { |
| 2921 | debug_text_event(adapter->erp_dbf, 5, "p_pstn_ref"); |
| 2922 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2923 | /* could not send nameserver request, fail */ |
| 2924 | retval = ZFCP_ERP_FAILED; |
| 2925 | goto out; |
| 2926 | } |
| 2927 | debug_text_event(adapter->erp_dbf, 6, "p_pstn_reok"); |
| 2928 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 2929 | retval = ZFCP_ERP_CONTINUES; |
| 2930 | out: |
| 2931 | return retval; |
| 2932 | } |
| 2933 | |
| 2934 | /* |
| 2935 | * function: |
| 2936 | * |
| 2937 | * purpose: this routine executes the 'Reopen Unit' action |
| 2938 | * currently no retries |
| 2939 | * |
| 2940 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2941 | * ZFCP_ERP_SUCCEEDED - action finished successfully |
| 2942 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2943 | */ |
| 2944 | static int |
| 2945 | zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) |
| 2946 | { |
| 2947 | int retval = ZFCP_ERP_FAILED; |
| 2948 | struct zfcp_unit *unit = erp_action->unit; |
| 2949 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2950 | |
| 2951 | switch (erp_action->step) { |
| 2952 | |
| 2953 | /* |
| 2954 | * FIXME: |
| 2955 | * the ULP spec. begs for waiting for oustanding commands |
| 2956 | */ |
| 2957 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2958 | zfcp_erp_unit_strategy_clearstati(unit); |
| 2959 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { |
| 2960 | ZFCP_LOG_DEBUG("unit 0x%016Lx is open -> " |
| 2961 | "trying close\n", unit->fcp_lun); |
| 2962 | retval = zfcp_erp_unit_strategy_close(erp_action); |
| 2963 | break; |
| 2964 | } |
| 2965 | /* else it's already closed, fall through */ |
| 2966 | case ZFCP_ERP_STEP_UNIT_CLOSING: |
| 2967 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { |
| 2968 | ZFCP_LOG_DEBUG("close failed for unit 0x%016Lx\n", |
| 2969 | unit->fcp_lun); |
| 2970 | retval = ZFCP_ERP_FAILED; |
| 2971 | } else { |
| 2972 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
| 2973 | retval = ZFCP_ERP_EXIT; |
| 2974 | else { |
| 2975 | ZFCP_LOG_DEBUG("unit 0x%016Lx is not open -> " |
| 2976 | "trying open\n", unit->fcp_lun); |
| 2977 | retval = |
| 2978 | zfcp_erp_unit_strategy_open(erp_action); |
| 2979 | } |
| 2980 | } |
| 2981 | break; |
| 2982 | |
| 2983 | case ZFCP_ERP_STEP_UNIT_OPENING: |
| 2984 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { |
| 2985 | ZFCP_LOG_DEBUG("unit 0x%016Lx is open\n", |
| 2986 | unit->fcp_lun); |
| 2987 | retval = ZFCP_ERP_SUCCEEDED; |
| 2988 | } else { |
| 2989 | ZFCP_LOG_DEBUG("open failed for unit 0x%016Lx\n", |
| 2990 | unit->fcp_lun); |
| 2991 | retval = ZFCP_ERP_FAILED; |
| 2992 | } |
| 2993 | break; |
| 2994 | } |
| 2995 | |
| 2996 | debug_text_event(adapter->erp_dbf, 3, "u_ust/ret"); |
| 2997 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 2998 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); |
| 2999 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); |
| 3000 | return retval; |
| 3001 | } |
| 3002 | |
| 3003 | /* |
| 3004 | * function: |
| 3005 | * |
| 3006 | * purpose: |
| 3007 | * |
| 3008 | * returns: |
| 3009 | */ |
| 3010 | static int |
| 3011 | zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) |
| 3012 | { |
| 3013 | int retval = 0; |
| 3014 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 3015 | |
| 3016 | debug_text_event(adapter->erp_dbf, 5, "u_ustclst"); |
| 3017 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 3018 | |
| 3019 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | |
| 3020 | ZFCP_STATUS_COMMON_CLOSING | |
| 3021 | ZFCP_STATUS_COMMON_ACCESS_DENIED | |
| 3022 | ZFCP_STATUS_UNIT_SHARED | |
| 3023 | ZFCP_STATUS_UNIT_READONLY, |
| 3024 | &unit->status); |
| 3025 | |
| 3026 | return retval; |
| 3027 | } |
| 3028 | |
| 3029 | /* |
| 3030 | * function: |
| 3031 | * |
| 3032 | * purpose: |
| 3033 | * |
| 3034 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 3035 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 3036 | */ |
| 3037 | static int |
| 3038 | zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) |
| 3039 | { |
| 3040 | int retval; |
| 3041 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 3042 | struct zfcp_unit *unit = erp_action->unit; |
| 3043 | |
| 3044 | zfcp_erp_timeout_init(erp_action); |
| 3045 | retval = zfcp_fsf_close_unit(erp_action); |
| 3046 | if (retval == -ENOMEM) { |
| 3047 | debug_text_event(adapter->erp_dbf, 5, "u_ustc_nomem"); |
| 3048 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 3049 | sizeof (fcp_lun_t)); |
| 3050 | retval = ZFCP_ERP_NOMEM; |
| 3051 | goto out; |
| 3052 | } |
| 3053 | erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; |
| 3054 | if (retval != 0) { |
| 3055 | debug_text_event(adapter->erp_dbf, 5, "u_ustc_cuf"); |
| 3056 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 3057 | sizeof (fcp_lun_t)); |
| 3058 | /* could not send 'close', fail */ |
| 3059 | retval = ZFCP_ERP_FAILED; |
| 3060 | goto out; |
| 3061 | } |
| 3062 | debug_text_event(adapter->erp_dbf, 6, "u_ustc_cuok"); |
| 3063 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 3064 | retval = ZFCP_ERP_CONTINUES; |
| 3065 | |
| 3066 | out: |
| 3067 | return retval; |
| 3068 | } |
| 3069 | |
| 3070 | /* |
| 3071 | * function: |
| 3072 | * |
| 3073 | * purpose: |
| 3074 | * |
| 3075 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 3076 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 3077 | */ |
| 3078 | static int |
| 3079 | zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) |
| 3080 | { |
| 3081 | int retval; |
| 3082 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 3083 | struct zfcp_unit *unit = erp_action->unit; |
| 3084 | |
| 3085 | zfcp_erp_timeout_init(erp_action); |
| 3086 | retval = zfcp_fsf_open_unit(erp_action); |
| 3087 | if (retval == -ENOMEM) { |
| 3088 | debug_text_event(adapter->erp_dbf, 5, "u_usto_nomem"); |
| 3089 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 3090 | sizeof (fcp_lun_t)); |
| 3091 | retval = ZFCP_ERP_NOMEM; |
| 3092 | goto out; |
| 3093 | } |
| 3094 | erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; |
| 3095 | if (retval != 0) { |
| 3096 | debug_text_event(adapter->erp_dbf, 5, "u_usto_ouf"); |
| 3097 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 3098 | sizeof (fcp_lun_t)); |
| 3099 | /* could not send 'open', fail */ |
| 3100 | retval = ZFCP_ERP_FAILED; |
| 3101 | goto out; |
| 3102 | } |
| 3103 | debug_text_event(adapter->erp_dbf, 6, "u_usto_ouok"); |
| 3104 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 3105 | retval = ZFCP_ERP_CONTINUES; |
| 3106 | out: |
| 3107 | return retval; |
| 3108 | } |
| 3109 | |
| 3110 | /* |
| 3111 | * function: |
| 3112 | * |
| 3113 | * purpose: |
| 3114 | * |
| 3115 | * returns: |
| 3116 | */ |
| 3117 | static inline void |
| 3118 | zfcp_erp_timeout_init(struct zfcp_erp_action *erp_action) |
| 3119 | { |
| 3120 | init_timer(&erp_action->timer); |
| 3121 | erp_action->timer.function = zfcp_erp_timeout_handler; |
| 3122 | erp_action->timer.data = (unsigned long) erp_action; |
| 3123 | /* jiffies will be added in zfcp_fsf_req_send */ |
| 3124 | erp_action->timer.expires = ZFCP_ERP_FSFREQ_TIMEOUT; |
| 3125 | } |
| 3126 | |
| 3127 | /* |
| 3128 | * function: |
| 3129 | * |
| 3130 | * purpose: enqueue the specified error recovery action, if needed |
| 3131 | * |
| 3132 | * returns: |
| 3133 | */ |
| 3134 | static int |
| 3135 | zfcp_erp_action_enqueue(int action, |
| 3136 | struct zfcp_adapter *adapter, |
| 3137 | struct zfcp_port *port, struct zfcp_unit *unit) |
| 3138 | { |
| 3139 | int retval = 1; |
| 3140 | struct zfcp_erp_action *erp_action = NULL; |
| 3141 | int stronger_action = 0; |
| 3142 | u32 status = 0; |
| 3143 | |
| 3144 | /* |
| 3145 | * We need some rules here which check whether we really need |
| 3146 | * this action or whether we should just drop it. |
| 3147 | * E.g. if there is a unfinished 'Reopen Port' request then we drop a |
| 3148 | * 'Reopen Unit' request for an associated unit since we can't |
| 3149 | * satisfy this request now. A 'Reopen Port' action will trigger |
| 3150 | * 'Reopen Unit' actions when it completes. |
| 3151 | * Thus, there are only actions in the queue which can immediately be |
| 3152 | * executed. This makes the processing of the action queue more |
| 3153 | * efficient. |
| 3154 | */ |
| 3155 | |
| 3156 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, |
| 3157 | &adapter->status)) |
| 3158 | return -EIO; |
| 3159 | |
| 3160 | debug_event(adapter->erp_dbf, 4, &action, sizeof (int)); |
| 3161 | /* check whether we really need this */ |
| 3162 | switch (action) { |
| 3163 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 3164 | if (atomic_test_mask |
| 3165 | (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) { |
| 3166 | debug_text_event(adapter->erp_dbf, 4, "u_actenq_drp"); |
| 3167 | debug_event(adapter->erp_dbf, 4, &port->wwpn, |
| 3168 | sizeof (wwn_t)); |
| 3169 | debug_event(adapter->erp_dbf, 4, &unit->fcp_lun, |
| 3170 | sizeof (fcp_lun_t)); |
| 3171 | goto out; |
| 3172 | } |
| 3173 | if (!atomic_test_mask |
| 3174 | (ZFCP_STATUS_COMMON_RUNNING, &port->status) || |
| 3175 | atomic_test_mask |
| 3176 | (ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { |
| 3177 | goto out; |
| 3178 | } |
| 3179 | if (!atomic_test_mask |
| 3180 | (ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) { |
| 3181 | stronger_action = ZFCP_ERP_ACTION_REOPEN_PORT; |
| 3182 | unit = NULL; |
| 3183 | } |
| 3184 | /* fall through !!! */ |
| 3185 | |
| 3186 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 3187 | if (atomic_test_mask |
| 3188 | (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) { |
| 3189 | debug_text_event(adapter->erp_dbf, 4, "p_actenq_drp"); |
| 3190 | debug_event(adapter->erp_dbf, 4, &port->wwpn, |
| 3191 | sizeof (wwn_t)); |
| 3192 | goto out; |
| 3193 | } |
| 3194 | /* fall through !!! */ |
| 3195 | |
| 3196 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 3197 | if (atomic_test_mask |
| 3198 | (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status) |
| 3199 | && port->erp_action.action == |
| 3200 | ZFCP_ERP_ACTION_REOPEN_PORT_FORCED) { |
| 3201 | debug_text_event(adapter->erp_dbf, 4, "pf_actenq_drp"); |
| 3202 | debug_event(adapter->erp_dbf, 4, &port->wwpn, |
| 3203 | sizeof (wwn_t)); |
| 3204 | goto out; |
| 3205 | } |
| 3206 | if (!atomic_test_mask |
| 3207 | (ZFCP_STATUS_COMMON_RUNNING, &adapter->status) || |
| 3208 | atomic_test_mask |
| 3209 | (ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { |
| 3210 | goto out; |
| 3211 | } |
| 3212 | if (!atomic_test_mask |
| 3213 | (ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) { |
| 3214 | stronger_action = ZFCP_ERP_ACTION_REOPEN_ADAPTER; |
| 3215 | port = NULL; |
| 3216 | } |
| 3217 | /* fall through !!! */ |
| 3218 | |
| 3219 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 3220 | if (atomic_test_mask |
| 3221 | (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) { |
| 3222 | debug_text_event(adapter->erp_dbf, 4, "a_actenq_drp"); |
| 3223 | goto out; |
| 3224 | } |
| 3225 | break; |
| 3226 | |
| 3227 | default: |
| 3228 | debug_text_exception(adapter->erp_dbf, 1, "a_actenq_bug"); |
| 3229 | debug_event(adapter->erp_dbf, 1, &action, sizeof (int)); |
| 3230 | ZFCP_LOG_NORMAL("bug: unknown erp action requested " |
| 3231 | "on adapter %s (action=%d)\n", |
| 3232 | zfcp_get_busid_by_adapter(adapter), action); |
| 3233 | goto out; |
| 3234 | } |
| 3235 | |
| 3236 | /* check whether we need something stronger first */ |
| 3237 | if (stronger_action) { |
| 3238 | debug_text_event(adapter->erp_dbf, 4, "a_actenq_str"); |
| 3239 | debug_event(adapter->erp_dbf, 4, &stronger_action, |
| 3240 | sizeof (int)); |
| 3241 | ZFCP_LOG_DEBUG("stronger erp action %d needed before " |
| 3242 | "erp action %d on adapter %s\n", |
| 3243 | stronger_action, action, |
| 3244 | zfcp_get_busid_by_adapter(adapter)); |
| 3245 | action = stronger_action; |
| 3246 | } |
| 3247 | |
| 3248 | /* mark adapter to have some error recovery pending */ |
| 3249 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); |
| 3250 | |
| 3251 | /* setup error recovery action */ |
| 3252 | switch (action) { |
| 3253 | |
| 3254 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 3255 | zfcp_unit_get(unit); |
| 3256 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); |
| 3257 | erp_action = &unit->erp_action; |
| 3258 | if (!atomic_test_mask |
| 3259 | (ZFCP_STATUS_COMMON_RUNNING, &unit->status)) |
| 3260 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; |
| 3261 | break; |
| 3262 | |
| 3263 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 3264 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 3265 | zfcp_port_get(port); |
| 3266 | zfcp_erp_action_dismiss_port(port); |
| 3267 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); |
| 3268 | erp_action = &port->erp_action; |
| 3269 | if (!atomic_test_mask |
| 3270 | (ZFCP_STATUS_COMMON_RUNNING, &port->status)) |
| 3271 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; |
| 3272 | break; |
| 3273 | |
| 3274 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 3275 | zfcp_adapter_get(adapter); |
| 3276 | zfcp_erp_action_dismiss_adapter(adapter); |
| 3277 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); |
| 3278 | erp_action = &adapter->erp_action; |
| 3279 | if (!atomic_test_mask |
| 3280 | (ZFCP_STATUS_COMMON_RUNNING, &adapter->status)) |
| 3281 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; |
| 3282 | break; |
| 3283 | } |
| 3284 | |
| 3285 | debug_text_event(adapter->erp_dbf, 4, "a_actenq"); |
| 3286 | |
| 3287 | memset(erp_action, 0, sizeof (struct zfcp_erp_action)); |
| 3288 | erp_action->adapter = adapter; |
| 3289 | erp_action->port = port; |
| 3290 | erp_action->unit = unit; |
| 3291 | erp_action->action = action; |
| 3292 | erp_action->status = status; |
| 3293 | |
| 3294 | ++adapter->erp_total_count; |
| 3295 | |
| 3296 | /* finally put it into 'ready' queue and kick erp thread */ |
| 3297 | list_add(&erp_action->list, &adapter->erp_ready_head); |
| 3298 | up(&adapter->erp_ready_sem); |
| 3299 | retval = 0; |
| 3300 | out: |
| 3301 | return retval; |
| 3302 | } |
| 3303 | |
| 3304 | /* |
| 3305 | * function: |
| 3306 | * |
| 3307 | * purpose: |
| 3308 | * |
| 3309 | * returns: |
| 3310 | */ |
| 3311 | static int |
| 3312 | zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) |
| 3313 | { |
| 3314 | int retval = 0; |
| 3315 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 3316 | |
| 3317 | --adapter->erp_total_count; |
| 3318 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { |
| 3319 | --adapter->erp_low_mem_count; |
| 3320 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; |
| 3321 | } |
| 3322 | |
| 3323 | debug_text_event(adapter->erp_dbf, 4, "a_actdeq"); |
| 3324 | debug_event(adapter->erp_dbf, 4, &erp_action->action, sizeof (int)); |
| 3325 | list_del(&erp_action->list); |
| 3326 | switch (erp_action->action) { |
| 3327 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 3328 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, |
| 3329 | &erp_action->unit->status); |
| 3330 | break; |
| 3331 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 3332 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 3333 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, |
| 3334 | &erp_action->port->status); |
| 3335 | break; |
| 3336 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 3337 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, |
| 3338 | &erp_action->adapter->status); |
| 3339 | break; |
| 3340 | default: |
| 3341 | /* bug */ |
| 3342 | break; |
| 3343 | } |
| 3344 | return retval; |
| 3345 | } |
| 3346 | |
| 3347 | /** |
| 3348 | * zfcp_erp_action_cleanup |
| 3349 | * |
| 3350 | * Register unit with scsi stack if appropiate and fix reference counts. |
| 3351 | * Note: Temporary units are not registered with scsi stack. |
| 3352 | */ |
| 3353 | static void |
| 3354 | zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter, |
| 3355 | struct zfcp_port *port, struct zfcp_unit *unit, |
| 3356 | int result) |
| 3357 | { |
| 3358 | switch (action) { |
| 3359 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 3360 | if ((result == ZFCP_ERP_SUCCEEDED) |
| 3361 | && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY, |
| 3362 | &unit->status)) |
| 3363 | && (!unit->device)) |
| 3364 | scsi_add_device(unit->port->adapter->scsi_host, 0, |
| 3365 | unit->port->scsi_id, unit->scsi_lun); |
| 3366 | zfcp_unit_put(unit); |
| 3367 | break; |
| 3368 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 3369 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 3370 | zfcp_port_put(port); |
| 3371 | break; |
| 3372 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 3373 | zfcp_adapter_put(adapter); |
| 3374 | break; |
| 3375 | default: |
| 3376 | break; |
| 3377 | } |
| 3378 | } |
| 3379 | |
| 3380 | |
| 3381 | /* |
| 3382 | * function: |
| 3383 | * |
| 3384 | * purpose: |
| 3385 | * |
| 3386 | * returns: FIXME |
| 3387 | */ |
| 3388 | static int |
| 3389 | zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) |
| 3390 | { |
| 3391 | int retval = 0; |
| 3392 | struct zfcp_port *port; |
| 3393 | |
| 3394 | debug_text_event(adapter->erp_dbf, 5, "a_actab"); |
| 3395 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) |
| 3396 | zfcp_erp_action_dismiss(&adapter->erp_action); |
| 3397 | else |
| 3398 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 3399 | zfcp_erp_action_dismiss_port(port); |
| 3400 | |
| 3401 | return retval; |
| 3402 | } |
| 3403 | |
| 3404 | /* |
| 3405 | * function: |
| 3406 | * |
| 3407 | * purpose: |
| 3408 | * |
| 3409 | * returns: FIXME |
| 3410 | */ |
| 3411 | static int |
| 3412 | zfcp_erp_action_dismiss_port(struct zfcp_port *port) |
| 3413 | { |
| 3414 | int retval = 0; |
| 3415 | struct zfcp_unit *unit; |
| 3416 | struct zfcp_adapter *adapter = port->adapter; |
| 3417 | |
| 3418 | debug_text_event(adapter->erp_dbf, 5, "p_actab"); |
| 3419 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 3420 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) |
| 3421 | zfcp_erp_action_dismiss(&port->erp_action); |
| 3422 | else |
| 3423 | list_for_each_entry(unit, &port->unit_list_head, list) |
| 3424 | zfcp_erp_action_dismiss_unit(unit); |
| 3425 | |
| 3426 | return retval; |
| 3427 | } |
| 3428 | |
| 3429 | /* |
| 3430 | * function: |
| 3431 | * |
| 3432 | * purpose: |
| 3433 | * |
| 3434 | * returns: FIXME |
| 3435 | */ |
| 3436 | static int |
| 3437 | zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) |
| 3438 | { |
| 3439 | int retval = 0; |
| 3440 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 3441 | |
| 3442 | debug_text_event(adapter->erp_dbf, 5, "u_actab"); |
| 3443 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 3444 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) |
| 3445 | zfcp_erp_action_dismiss(&unit->erp_action); |
| 3446 | |
| 3447 | return retval; |
| 3448 | } |
| 3449 | |
| 3450 | /* |
| 3451 | * function: |
| 3452 | * |
| 3453 | * purpose: moves erp_action to 'erp running list' |
| 3454 | * |
| 3455 | * returns: |
| 3456 | */ |
| 3457 | static inline void |
| 3458 | zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) |
| 3459 | { |
| 3460 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 3461 | |
| 3462 | debug_text_event(adapter->erp_dbf, 6, "a_toru"); |
| 3463 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); |
| 3464 | list_move(&erp_action->list, &erp_action->adapter->erp_running_head); |
| 3465 | } |
| 3466 | |
| 3467 | /* |
| 3468 | * function: |
| 3469 | * |
| 3470 | * purpose: moves erp_action to 'erp ready list' |
| 3471 | * |
| 3472 | * returns: |
| 3473 | */ |
| 3474 | static inline void |
| 3475 | zfcp_erp_action_to_ready(struct zfcp_erp_action *erp_action) |
| 3476 | { |
| 3477 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 3478 | |
| 3479 | debug_text_event(adapter->erp_dbf, 6, "a_tore"); |
| 3480 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); |
| 3481 | list_move(&erp_action->list, &erp_action->adapter->erp_ready_head); |
| 3482 | } |
| 3483 | |
| 3484 | /* |
| 3485 | * function: zfcp_erp_port_access_denied |
| 3486 | * |
| 3487 | * purpose: |
| 3488 | */ |
| 3489 | void |
| 3490 | zfcp_erp_port_access_denied(struct zfcp_port *port) |
| 3491 | { |
| 3492 | struct zfcp_adapter *adapter = port->adapter; |
| 3493 | unsigned long flags; |
| 3494 | |
| 3495 | debug_text_event(adapter->erp_dbf, 3, "p_access_block"); |
| 3496 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t)); |
| 3497 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 3498 | zfcp_erp_modify_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED | |
| 3499 | ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); |
| 3500 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 3501 | } |
| 3502 | |
| 3503 | /* |
| 3504 | * function: zfcp_erp_unit_access_denied |
| 3505 | * |
| 3506 | * purpose: |
| 3507 | */ |
| 3508 | void |
| 3509 | zfcp_erp_unit_access_denied(struct zfcp_unit *unit) |
| 3510 | { |
| 3511 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 3512 | |
| 3513 | debug_text_event(adapter->erp_dbf, 3, "u_access_block"); |
| 3514 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t)); |
| 3515 | zfcp_erp_modify_unit_status(unit, ZFCP_STATUS_COMMON_ERP_FAILED | |
| 3516 | ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); |
| 3517 | } |
| 3518 | |
| 3519 | /* |
| 3520 | * function: zfcp_erp_adapter_access_changed |
| 3521 | * |
| 3522 | * purpose: |
| 3523 | */ |
| 3524 | void |
| 3525 | zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter) |
| 3526 | { |
| 3527 | struct zfcp_port *port; |
| 3528 | unsigned long flags; |
| 3529 | |
| 3530 | debug_text_event(adapter->erp_dbf, 3, "a_access_unblock"); |
| 3531 | debug_event(adapter->erp_dbf, 3, &adapter->name, 8); |
| 3532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3533 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 6f71d9b | 2005-04-10 23:04:28 -0500 | [diff] [blame] | 3534 | if (adapter->nameserver_port) |
| 3535 | zfcp_erp_port_access_changed(adapter->nameserver_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3536 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 3537 | if (port != adapter->nameserver_port) |
| 3538 | zfcp_erp_port_access_changed(port); |
| 3539 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 3540 | } |
| 3541 | |
| 3542 | /* |
| 3543 | * function: zfcp_erp_port_access_changed |
| 3544 | * |
| 3545 | * purpose: |
| 3546 | */ |
| 3547 | void |
| 3548 | zfcp_erp_port_access_changed(struct zfcp_port *port) |
| 3549 | { |
| 3550 | struct zfcp_adapter *adapter = port->adapter; |
| 3551 | struct zfcp_unit *unit; |
| 3552 | |
| 3553 | debug_text_event(adapter->erp_dbf, 3, "p_access_unblock"); |
| 3554 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t)); |
| 3555 | |
| 3556 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, |
| 3557 | &port->status)) { |
| 3558 | if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) |
| 3559 | list_for_each_entry(unit, &port->unit_list_head, list) |
| 3560 | zfcp_erp_unit_access_changed(unit); |
| 3561 | return; |
| 3562 | } |
| 3563 | |
| 3564 | ZFCP_LOG_NORMAL("reopen of port 0x%016Lx on adapter %s " |
| 3565 | "(due to ACT update)\n", |
| 3566 | port->wwpn, zfcp_get_busid_by_adapter(adapter)); |
| 3567 | if (zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED) != 0) |
| 3568 | ZFCP_LOG_NORMAL("failed reopen of port" |
| 3569 | "(adapter %s, wwpn=0x%016Lx)\n", |
| 3570 | zfcp_get_busid_by_adapter(adapter), port->wwpn); |
| 3571 | } |
| 3572 | |
| 3573 | /* |
| 3574 | * function: zfcp_erp_unit_access_changed |
| 3575 | * |
| 3576 | * purpose: |
| 3577 | */ |
| 3578 | void |
| 3579 | zfcp_erp_unit_access_changed(struct zfcp_unit *unit) |
| 3580 | { |
| 3581 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 3582 | |
| 3583 | debug_text_event(adapter->erp_dbf, 3, "u_access_unblock"); |
| 3584 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t)); |
| 3585 | |
| 3586 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status)) |
| 3587 | return; |
| 3588 | |
| 3589 | ZFCP_LOG_NORMAL("reopen of unit 0x%016Lx on port 0x%016Lx " |
| 3590 | " on adapter %s (due to ACT update)\n", |
| 3591 | unit->fcp_lun, unit->port->wwpn, |
| 3592 | zfcp_get_busid_by_adapter(adapter)); |
| 3593 | if (zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED) != 0) |
| 3594 | ZFCP_LOG_NORMAL("failed reopen of unit (adapter %s, " |
| 3595 | "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", |
| 3596 | zfcp_get_busid_by_adapter(adapter), |
| 3597 | unit->port->wwpn, unit->fcp_lun); |
| 3598 | } |
| 3599 | |
| 3600 | #undef ZFCP_LOG_AREA |