Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1 | /* |
Andreas Herrmann | 4a9d2d8 | 2006-05-22 18:14:08 +0200 | [diff] [blame] | 2 | * This file is part of the zfcp device driver for |
| 3 | * FCP adapters for IBM System z9 and zSeries. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Andreas Herrmann | 4a9d2d8 | 2006-05-22 18:14:08 +0200 | [diff] [blame] | 5 | * (C) Copyright IBM Corp. 2002, 2006 |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | */ |
| 21 | |
| 22 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_ERP |
| 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "zfcp_ext.h" |
| 25 | |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 26 | static int zfcp_erp_adisc(struct zfcp_port *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | static void zfcp_erp_adisc_handler(unsigned long); |
| 28 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 29 | static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int, u8, |
| 30 | u64); |
| 31 | static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *, int, u8, |
| 32 | u64); |
| 33 | static int zfcp_erp_port_reopen_internal(struct zfcp_port *, int, u8, u64); |
| 34 | static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *, int, u8, u64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 36 | static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *, int, u8, |
| 37 | u64); |
| 38 | static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *, int, u8, u64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | static void zfcp_erp_adapter_block(struct zfcp_adapter *, int); |
| 41 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *); |
| 42 | static void zfcp_erp_port_block(struct zfcp_port *, int); |
| 43 | static void zfcp_erp_port_unblock(struct zfcp_port *); |
| 44 | static void zfcp_erp_unit_block(struct zfcp_unit *, int); |
| 45 | static void zfcp_erp_unit_unblock(struct zfcp_unit *); |
| 46 | |
| 47 | static int zfcp_erp_thread(void *); |
| 48 | |
| 49 | static int zfcp_erp_strategy(struct zfcp_erp_action *); |
| 50 | |
| 51 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *); |
| 52 | static int zfcp_erp_strategy_memwait(struct zfcp_erp_action *); |
| 53 | static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *, int); |
| 54 | static int zfcp_erp_strategy_check_unit(struct zfcp_unit *, int); |
| 55 | static int zfcp_erp_strategy_check_port(struct zfcp_port *, int); |
| 56 | static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *, int); |
| 57 | static int zfcp_erp_strategy_statechange(int, u32, struct zfcp_adapter *, |
| 58 | struct zfcp_port *, |
| 59 | struct zfcp_unit *, int); |
Heiko Carstens | 364c855 | 2007-10-12 16:11:35 +0200 | [diff] [blame] | 60 | static int zfcp_erp_strategy_statechange_detected(atomic_t *, u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static int zfcp_erp_strategy_followup_actions(int, struct zfcp_adapter *, |
| 62 | struct zfcp_port *, |
| 63 | struct zfcp_unit *, int); |
| 64 | static int zfcp_erp_strategy_check_queues(struct zfcp_adapter *); |
| 65 | static int zfcp_erp_strategy_check_action(struct zfcp_erp_action *, int); |
| 66 | |
| 67 | static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *); |
| 68 | static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int); |
| 69 | static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *); |
| 71 | static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *); |
| 72 | static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *); |
| 73 | static int zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *); |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 74 | static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | static int zfcp_erp_adapter_strategy_open_fsf_statusread( |
| 76 | struct zfcp_erp_action *); |
| 77 | |
| 78 | static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *); |
| 79 | static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *); |
| 80 | |
| 81 | static int zfcp_erp_port_strategy(struct zfcp_erp_action *); |
| 82 | static int zfcp_erp_port_strategy_clearstati(struct zfcp_port *); |
| 83 | static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *); |
| 84 | static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *); |
| 85 | static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *); |
| 86 | static int zfcp_erp_port_strategy_open_nameserver_wakeup( |
| 87 | struct zfcp_erp_action *); |
| 88 | static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *); |
| 89 | static int zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *); |
| 90 | static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *); |
| 91 | |
| 92 | static int zfcp_erp_unit_strategy(struct zfcp_erp_action *); |
| 93 | static int zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *); |
| 94 | static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *); |
| 95 | static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *); |
| 96 | |
Andreas Herrmann | 8165428 | 2006-09-18 22:30:36 +0200 | [diff] [blame] | 97 | static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *); |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 98 | static void zfcp_erp_action_dismiss_port(struct zfcp_port *); |
| 99 | static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *); |
| 100 | static void zfcp_erp_action_dismiss(struct zfcp_erp_action *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
| 102 | static int zfcp_erp_action_enqueue(int, struct zfcp_adapter *, |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 103 | struct zfcp_port *, struct zfcp_unit *, |
| 104 | u8 id, u64 ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | static int zfcp_erp_action_dequeue(struct zfcp_erp_action *); |
| 106 | static void zfcp_erp_action_cleanup(int, struct zfcp_adapter *, |
| 107 | struct zfcp_port *, struct zfcp_unit *, |
| 108 | int); |
| 109 | |
| 110 | static void zfcp_erp_action_ready(struct zfcp_erp_action *); |
| 111 | static int zfcp_erp_action_exists(struct zfcp_erp_action *); |
| 112 | |
Heiko Carstens | 364c855 | 2007-10-12 16:11:35 +0200 | [diff] [blame] | 113 | static void zfcp_erp_action_to_ready(struct zfcp_erp_action *); |
| 114 | static void zfcp_erp_action_to_running(struct zfcp_erp_action *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
| 116 | static void zfcp_erp_memwait_handler(unsigned long); |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 117 | |
| 118 | /** |
| 119 | * zfcp_close_qdio - close qdio queues for an adapter |
| 120 | */ |
| 121 | static void zfcp_close_qdio(struct zfcp_adapter *adapter) |
| 122 | { |
| 123 | struct zfcp_qdio_queue *req_queue; |
| 124 | int first, count; |
| 125 | |
| 126 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) |
| 127 | return; |
| 128 | |
| 129 | /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ |
| 130 | req_queue = &adapter->request_queue; |
| 131 | write_lock_irq(&req_queue->queue_lock); |
| 132 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); |
| 133 | write_unlock_irq(&req_queue->queue_lock); |
| 134 | |
| 135 | debug_text_event(adapter->erp_dbf, 3, "qdio_down2a"); |
| 136 | while (qdio_shutdown(adapter->ccw_device, |
| 137 | QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) |
Christof Schmitt | 18edcdb | 2007-11-05 12:37:45 +0100 | [diff] [blame] | 138 | ssleep(1); |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 139 | debug_text_event(adapter->erp_dbf, 3, "qdio_down2b"); |
| 140 | |
| 141 | /* cleanup used outbound sbals */ |
| 142 | count = atomic_read(&req_queue->free_count); |
| 143 | if (count < QDIO_MAX_BUFFERS_PER_Q) { |
| 144 | first = (req_queue->free_index+count) % QDIO_MAX_BUFFERS_PER_Q; |
| 145 | count = QDIO_MAX_BUFFERS_PER_Q - count; |
| 146 | zfcp_qdio_zero_sbals(req_queue->buffer, first, count); |
| 147 | } |
| 148 | req_queue->free_index = 0; |
| 149 | atomic_set(&req_queue->free_count, 0); |
| 150 | req_queue->distance_from_int = 0; |
| 151 | adapter->response_queue.free_index = 0; |
| 152 | atomic_set(&adapter->response_queue.free_count, 0); |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * zfcp_close_fsf - stop FSF operations for an adapter |
| 157 | * |
| 158 | * Dismiss and cleanup all pending fsf_reqs (this wakes up all initiators of |
| 159 | * requests waiting for completion; especially this returns SCSI commands |
| 160 | * with error state). |
| 161 | */ |
| 162 | static void zfcp_close_fsf(struct zfcp_adapter *adapter) |
| 163 | { |
| 164 | /* close queues to ensure that buffers are not accessed by adapter */ |
| 165 | zfcp_close_qdio(adapter); |
| 166 | zfcp_fsf_req_dismiss_all(adapter); |
| 167 | /* reset FSF request sequence number */ |
| 168 | adapter->fsf_req_seq_no = 0; |
| 169 | /* all ports and units are closed */ |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 170 | zfcp_erp_modify_adapter_status(adapter, 24, 0, |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 171 | ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); |
| 172 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | /** |
| 175 | * zfcp_fsf_request_timeout_handler - called if a request timed out |
| 176 | * @data: pointer to adapter for handler function |
| 177 | * |
| 178 | * This function needs to be called if requests (ELS, Generic Service, |
| 179 | * or SCSI commands) exceed a certain time limit. The assumption is |
| 180 | * that after the time limit the adapter get stuck. So we trigger a reopen of |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 181 | * the adapter. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | */ |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 183 | static void zfcp_fsf_request_timeout_handler(unsigned long data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 185 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 186 | zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 189 | void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, unsigned long timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 191 | fsf_req->timer.function = zfcp_fsf_request_timeout_handler; |
| 192 | fsf_req->timer.data = (unsigned long) fsf_req->adapter; |
Christof Schmitt | 9e3738f | 2007-03-28 14:20:40 +0200 | [diff] [blame] | 193 | fsf_req->timer.expires = jiffies + timeout; |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 194 | add_timer(&fsf_req->timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 198 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | * |
| 200 | * purpose: called if an adapter failed, |
| 201 | * initiates adapter recovery which is done |
| 202 | * asynchronously |
| 203 | * |
Andreas Mohr | d6e05ed | 2006-06-26 18:35:02 +0200 | [diff] [blame] | 204 | * returns: 0 - initiated action successfully |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | * <0 - failed to initiate action |
| 206 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 207 | static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *adapter, |
| 208 | int clear_mask, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | { |
| 210 | int retval; |
| 211 | |
| 212 | debug_text_event(adapter->erp_dbf, 5, "a_ro"); |
| 213 | ZFCP_LOG_DEBUG("reopen adapter %s\n", |
| 214 | zfcp_get_busid_by_adapter(adapter)); |
| 215 | |
| 216 | zfcp_erp_adapter_block(adapter, clear_mask); |
| 217 | |
| 218 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { |
| 219 | ZFCP_LOG_DEBUG("skipped reopen of failed adapter %s\n", |
| 220 | zfcp_get_busid_by_adapter(adapter)); |
| 221 | debug_text_event(adapter->erp_dbf, 5, "a_ro_f"); |
| 222 | /* ensure propagation of failed status to new devices */ |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 223 | zfcp_erp_adapter_failed(adapter, 13, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | retval = -EIO; |
| 225 | goto out; |
| 226 | } |
| 227 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 228 | adapter, NULL, NULL, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
| 230 | out: |
| 231 | return retval; |
| 232 | } |
| 233 | |
| 234 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 235 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | * |
| 237 | * purpose: Wrappper for zfcp_erp_adapter_reopen_internal |
| 238 | * used to ensure the correct locking |
| 239 | * |
Andreas Mohr | d6e05ed | 2006-06-26 18:35:02 +0200 | [diff] [blame] | 240 | * returns: 0 - initiated action successfully |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | * <0 - failed to initiate action |
| 242 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 243 | int zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear_mask, |
| 244 | u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | { |
| 246 | int retval; |
| 247 | unsigned long flags; |
| 248 | |
| 249 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 250 | write_lock(&adapter->erp_lock); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 251 | retval = zfcp_erp_adapter_reopen_internal(adapter, clear_mask, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | write_unlock(&adapter->erp_lock); |
| 253 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 254 | |
| 255 | return retval; |
| 256 | } |
| 257 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 258 | int zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear_mask, |
| 259 | u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | { |
| 261 | int retval; |
| 262 | |
| 263 | retval = zfcp_erp_adapter_reopen(adapter, |
| 264 | ZFCP_STATUS_COMMON_RUNNING | |
| 265 | ZFCP_STATUS_COMMON_ERP_FAILED | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 266 | clear_mask, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
| 268 | return retval; |
| 269 | } |
| 270 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 271 | int zfcp_erp_port_shutdown(struct zfcp_port *port, int clear_mask, u8 id, |
| 272 | u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | { |
| 274 | int retval; |
| 275 | |
| 276 | retval = zfcp_erp_port_reopen(port, |
| 277 | ZFCP_STATUS_COMMON_RUNNING | |
| 278 | ZFCP_STATUS_COMMON_ERP_FAILED | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 279 | clear_mask, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | return retval; |
| 282 | } |
| 283 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 284 | int zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear_mask, u8 id, |
| 285 | u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | { |
| 287 | int retval; |
| 288 | |
| 289 | retval = zfcp_erp_unit_reopen(unit, |
| 290 | ZFCP_STATUS_COMMON_RUNNING | |
| 291 | ZFCP_STATUS_COMMON_ERP_FAILED | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 292 | clear_mask, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
| 294 | return retval; |
| 295 | } |
| 296 | |
| 297 | |
| 298 | /** |
| 299 | * zfcp_erp_adisc - send ADISC ELS command |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 300 | * @port: port structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | */ |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 302 | static int |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 303 | zfcp_erp_adisc(struct zfcp_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | { |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 305 | struct zfcp_adapter *adapter = port->adapter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | struct zfcp_send_els *send_els; |
| 307 | struct zfcp_ls_adisc *adisc; |
| 308 | void *address = NULL; |
| 309 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Andreas Herrmann | ec4081c | 2006-05-22 18:17:30 +0200 | [diff] [blame] | 311 | send_els = kzalloc(sizeof(struct zfcp_send_els), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | if (send_els == NULL) |
| 313 | goto nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Jens Axboe | 73fc4f0 | 2007-10-23 09:17:53 +0200 | [diff] [blame] | 315 | send_els->req = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | if (send_els->req == NULL) |
| 317 | goto nomem; |
Jens Axboe | 73fc4f0 | 2007-10-23 09:17:53 +0200 | [diff] [blame] | 318 | sg_init_table(send_els->req, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Jens Axboe | 73fc4f0 | 2007-10-23 09:17:53 +0200 | [diff] [blame] | 320 | send_els->resp = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | if (send_els->resp == NULL) |
| 322 | goto nomem; |
Jens Axboe | 73fc4f0 | 2007-10-23 09:17:53 +0200 | [diff] [blame] | 323 | sg_init_table(send_els->resp, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
| 325 | address = (void *) get_zeroed_page(GFP_ATOMIC); |
| 326 | if (address == NULL) |
| 327 | goto nomem; |
| 328 | |
Jens Axboe | 642f149 | 2007-10-24 11:20:47 +0200 | [diff] [blame] | 329 | zfcp_address_to_sg(address, send_els->req, sizeof(struct zfcp_ls_adisc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | address += PAGE_SIZE >> 1; |
Jens Axboe | 642f149 | 2007-10-24 11:20:47 +0200 | [diff] [blame] | 331 | zfcp_address_to_sg(address, send_els->resp, sizeof(struct zfcp_ls_adisc_acc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports |
| 344 | without FC-AL-2 capability, so we don't set it */ |
Andreas Herrmann | 13e1e1f | 2005-09-19 16:56:17 +0200 | [diff] [blame] | 345 | adisc->wwpn = fc_host_port_name(adapter->scsi_host); |
| 346 | adisc->wwnn = fc_host_node_name(adapter->scsi_host); |
| 347 | adisc->nport_id = fc_host_port_id(adapter->scsi_host); |
Christof Schmitt | 1d589ed | 2007-05-08 11:14:41 +0200 | [diff] [blame] | 348 | ZFCP_LOG_INFO("ADISC request from s_id 0x%06x to d_id 0x%06x " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | "(wwpn=0x%016Lx, wwnn=0x%016Lx, " |
Christof Schmitt | 1d589ed | 2007-05-08 11:14:41 +0200 | [diff] [blame] | 350 | "hard_nport_id=0x%06x, nport_id=0x%06x)\n", |
Andreas Herrmann | 13e1e1f | 2005-09-19 16:56:17 +0200 | [diff] [blame] | 351 | adisc->nport_id, send_els->d_id, (wwn_t) adisc->wwpn, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | (wwn_t) adisc->wwnn, adisc->hard_nport_id, |
| 353 | adisc->nport_id); |
| 354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | retval = zfcp_fsf_send_els(send_els); |
| 356 | if (retval != 0) { |
| 357 | ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port " |
Christof Schmitt | 1d589ed | 2007-05-08 11:14:41 +0200 | [diff] [blame] | 358 | "0x%06x on adapter %s\n", send_els->d_id, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | zfcp_get_busid_by_adapter(adapter)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | goto freemem; |
| 361 | } |
| 362 | |
| 363 | goto out; |
| 364 | |
| 365 | nomem: |
| 366 | retval = -ENOMEM; |
| 367 | freemem: |
| 368 | if (address != NULL) |
Jens Axboe | 73fc4f0 | 2007-10-23 09:17:53 +0200 | [diff] [blame] | 369 | __free_pages(sg_page(send_els->req), 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | if (send_els != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | kfree(send_els->req); |
| 372 | kfree(send_els->resp); |
| 373 | kfree(send_els); |
| 374 | } |
| 375 | out: |
| 376 | return retval; |
| 377 | } |
| 378 | |
| 379 | |
| 380 | /** |
| 381 | * zfcp_erp_adisc_handler - handler for ADISC ELS command |
| 382 | * @data: pointer to struct zfcp_send_els |
| 383 | * |
| 384 | * If ADISC failed (LS_RJT or timed out) forced reopen of the port is triggered. |
| 385 | */ |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 386 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | zfcp_erp_adisc_handler(unsigned long data) |
| 388 | { |
| 389 | struct zfcp_send_els *send_els; |
| 390 | struct zfcp_port *port; |
| 391 | struct zfcp_adapter *adapter; |
Andreas Herrmann | 13e1e1f | 2005-09-19 16:56:17 +0200 | [diff] [blame] | 392 | u32 d_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | struct zfcp_ls_adisc_acc *adisc; |
| 394 | |
| 395 | send_els = (struct zfcp_send_els *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | adapter = send_els->adapter; |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 397 | port = send_els->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | d_id = send_els->d_id; |
| 399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | /* request rejected or timed out */ |
| 401 | if (send_els->status != 0) { |
| 402 | ZFCP_LOG_NORMAL("ELS request rejected/timed out, " |
| 403 | "force physical port reopen " |
Christof Schmitt | 1d589ed | 2007-05-08 11:14:41 +0200 | [diff] [blame] | 404 | "(adapter %s, port d_id=0x%06x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | zfcp_get_busid_by_adapter(adapter), d_id); |
| 406 | debug_text_event(adapter->erp_dbf, 3, "forcreop"); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 407 | if (zfcp_erp_port_forced_reopen(port, 0, 63, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | ZFCP_LOG_NORMAL("failed reopen of port " |
| 409 | "(adapter %s, wwpn=0x%016Lx)\n", |
| 410 | zfcp_get_busid_by_port(port), |
| 411 | port->wwpn); |
| 412 | goto out; |
| 413 | } |
| 414 | |
| 415 | adisc = zfcp_sg_to_address(send_els->resp); |
| 416 | |
Christof Schmitt | 1d589ed | 2007-05-08 11:14:41 +0200 | [diff] [blame] | 417 | ZFCP_LOG_INFO("ADISC response from d_id 0x%06x to s_id " |
| 418 | "0x%06x (wwpn=0x%016Lx, wwnn=0x%016Lx, " |
| 419 | "hard_nport_id=0x%06x, nport_id=0x%06x)\n", |
Andreas Herrmann | 13e1e1f | 2005-09-19 16:56:17 +0200 | [diff] [blame] | 420 | d_id, fc_host_port_id(adapter->scsi_host), |
| 421 | (wwn_t) adisc->wwpn, (wwn_t) adisc->wwnn, |
| 422 | adisc->hard_nport_id, adisc->nport_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
| 424 | /* set wwnn for port */ |
| 425 | if (port->wwnn == 0) |
| 426 | port->wwnn = adisc->wwnn; |
| 427 | |
| 428 | if (port->wwpn != adisc->wwpn) { |
| 429 | ZFCP_LOG_NORMAL("d_id assignment changed, reopening " |
| 430 | "port (adapter %s, wwpn=0x%016Lx, " |
| 431 | "adisc_resp_wwpn=0x%016Lx)\n", |
| 432 | zfcp_get_busid_by_port(port), |
| 433 | port->wwpn, (wwn_t) adisc->wwpn); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 434 | if (zfcp_erp_port_reopen(port, 0, 64, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | ZFCP_LOG_NORMAL("failed reopen of port " |
| 436 | "(adapter %s, wwpn=0x%016Lx)\n", |
| 437 | zfcp_get_busid_by_port(port), |
| 438 | port->wwpn); |
| 439 | } |
| 440 | |
| 441 | out: |
| 442 | zfcp_port_put(port); |
Jens Axboe | 73fc4f0 | 2007-10-23 09:17:53 +0200 | [diff] [blame] | 443 | __free_pages(sg_page(send_els->req), 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | kfree(send_els->req); |
| 445 | kfree(send_els->resp); |
| 446 | kfree(send_els); |
| 447 | } |
| 448 | |
| 449 | |
| 450 | /** |
| 451 | * zfcp_test_link - lightweight link test procedure |
| 452 | * @port: port to be tested |
| 453 | * |
| 454 | * Test status of a link to a remote port using the ELS command ADISC. |
| 455 | */ |
| 456 | int |
| 457 | zfcp_test_link(struct zfcp_port *port) |
| 458 | { |
| 459 | int retval; |
| 460 | |
| 461 | zfcp_port_get(port); |
Andreas Herrmann | 64b29a13 | 2005-06-13 13:18:56 +0200 | [diff] [blame] | 462 | retval = zfcp_erp_adisc(port); |
Christof Schmitt | 3f0ca62 | 2007-12-20 12:30:25 +0100 | [diff] [blame] | 463 | if (retval != 0 && retval != -EBUSY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | zfcp_port_put(port); |
| 465 | ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx " |
| 466 | "on adapter %s\n ", port->wwpn, |
| 467 | zfcp_get_busid_by_port(port)); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 468 | retval = zfcp_erp_port_forced_reopen(port, 0, 65, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | if (retval != 0) { |
| 470 | ZFCP_LOG_NORMAL("reopen of remote port 0x%016Lx " |
| 471 | "on adapter %s failed\n", port->wwpn, |
| 472 | zfcp_get_busid_by_port(port)); |
| 473 | retval = -EPERM; |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | return retval; |
| 478 | } |
| 479 | |
| 480 | |
| 481 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 482 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | * |
| 484 | * purpose: called if a port failed to be opened normally |
| 485 | * initiates Forced Reopen recovery which is done |
| 486 | * asynchronously |
| 487 | * |
Andreas Mohr | d6e05ed | 2006-06-26 18:35:02 +0200 | [diff] [blame] | 488 | * returns: 0 - initiated action successfully |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | * <0 - failed to initiate action |
| 490 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 491 | static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *port, |
| 492 | int clear_mask, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { |
| 494 | int retval; |
| 495 | struct zfcp_adapter *adapter = port->adapter; |
| 496 | |
| 497 | debug_text_event(adapter->erp_dbf, 5, "pf_ro"); |
| 498 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 499 | |
| 500 | ZFCP_LOG_DEBUG("forced reopen of port 0x%016Lx on adapter %s\n", |
| 501 | port->wwpn, zfcp_get_busid_by_port(port)); |
| 502 | |
| 503 | zfcp_erp_port_block(port, clear_mask); |
| 504 | |
| 505 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { |
| 506 | ZFCP_LOG_DEBUG("skipped forced reopen of failed port 0x%016Lx " |
| 507 | "on adapter %s\n", port->wwpn, |
| 508 | zfcp_get_busid_by_port(port)); |
| 509 | debug_text_event(adapter->erp_dbf, 5, "pf_ro_f"); |
| 510 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 511 | retval = -EIO; |
| 512 | goto out; |
| 513 | } |
| 514 | |
| 515 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 516 | port->adapter, port, NULL, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | out: |
| 519 | return retval; |
| 520 | } |
| 521 | |
| 522 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 523 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | * |
| 525 | * purpose: Wrappper for zfcp_erp_port_forced_reopen_internal |
| 526 | * used to ensure the correct locking |
| 527 | * |
Andreas Mohr | d6e05ed | 2006-06-26 18:35:02 +0200 | [diff] [blame] | 528 | * returns: 0 - initiated action successfully |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | * <0 - failed to initiate action |
| 530 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 531 | int zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear_mask, u8 id, |
| 532 | u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | { |
| 534 | int retval; |
| 535 | unsigned long flags; |
| 536 | struct zfcp_adapter *adapter; |
| 537 | |
| 538 | adapter = port->adapter; |
| 539 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 540 | write_lock(&adapter->erp_lock); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 541 | retval = zfcp_erp_port_forced_reopen_internal(port, clear_mask, id, |
| 542 | ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | write_unlock(&adapter->erp_lock); |
| 544 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 545 | |
| 546 | return retval; |
| 547 | } |
| 548 | |
| 549 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 550 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | * |
| 552 | * purpose: called if a port is to be opened |
| 553 | * initiates Reopen recovery which is done |
| 554 | * asynchronously |
| 555 | * |
Andreas Mohr | d6e05ed | 2006-06-26 18:35:02 +0200 | [diff] [blame] | 556 | * returns: 0 - initiated action successfully |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | * <0 - failed to initiate action |
| 558 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 559 | static int zfcp_erp_port_reopen_internal(struct zfcp_port *port, int clear_mask, |
| 560 | u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | { |
| 562 | int retval; |
| 563 | struct zfcp_adapter *adapter = port->adapter; |
| 564 | |
| 565 | debug_text_event(adapter->erp_dbf, 5, "p_ro"); |
| 566 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 567 | |
| 568 | ZFCP_LOG_DEBUG("reopen of port 0x%016Lx on adapter %s\n", |
| 569 | port->wwpn, zfcp_get_busid_by_port(port)); |
| 570 | |
| 571 | zfcp_erp_port_block(port, clear_mask); |
| 572 | |
| 573 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { |
| 574 | ZFCP_LOG_DEBUG("skipped reopen of failed port 0x%016Lx " |
| 575 | "on adapter %s\n", port->wwpn, |
| 576 | zfcp_get_busid_by_port(port)); |
| 577 | debug_text_event(adapter->erp_dbf, 5, "p_ro_f"); |
| 578 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 579 | /* ensure propagation of failed status to new devices */ |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 580 | zfcp_erp_port_failed(port, 14, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | retval = -EIO; |
| 582 | goto out; |
| 583 | } |
| 584 | |
| 585 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 586 | port->adapter, port, NULL, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
| 588 | out: |
| 589 | return retval; |
| 590 | } |
| 591 | |
| 592 | /** |
| 593 | * zfcp_erp_port_reopen - initiate reopen of a remote port |
| 594 | * @port: port to be reopened |
| 595 | * @clear_mask: specifies flags in port status to be cleared |
| 596 | * Return: 0 on success, < 0 on error |
| 597 | * |
| 598 | * This is a wrappper function for zfcp_erp_port_reopen_internal. It ensures |
| 599 | * correct locking. An error recovery task is initiated to do the reopen. |
| 600 | * To wait for the completion of the reopen zfcp_erp_wait should be used. |
| 601 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 602 | int zfcp_erp_port_reopen(struct zfcp_port *port, int clear_mask, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | { |
| 604 | int retval; |
| 605 | unsigned long flags; |
| 606 | struct zfcp_adapter *adapter = port->adapter; |
| 607 | |
| 608 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 609 | write_lock(&adapter->erp_lock); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 610 | retval = zfcp_erp_port_reopen_internal(port, clear_mask, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | write_unlock(&adapter->erp_lock); |
| 612 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 613 | |
| 614 | return retval; |
| 615 | } |
| 616 | |
| 617 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 618 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | * |
| 620 | * purpose: called if a unit is to be opened |
| 621 | * initiates Reopen recovery which is done |
| 622 | * asynchronously |
| 623 | * |
Andreas Mohr | d6e05ed | 2006-06-26 18:35:02 +0200 | [diff] [blame] | 624 | * returns: 0 - initiated action successfully |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | * <0 - failed to initiate action |
| 626 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 627 | static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask, |
| 628 | u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | { |
| 630 | int retval; |
| 631 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 632 | |
| 633 | debug_text_event(adapter->erp_dbf, 5, "u_ro"); |
| 634 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 635 | ZFCP_LOG_DEBUG("reopen of unit 0x%016Lx on port 0x%016Lx " |
| 636 | "on adapter %s\n", unit->fcp_lun, |
| 637 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); |
| 638 | |
| 639 | zfcp_erp_unit_block(unit, clear_mask); |
| 640 | |
| 641 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { |
| 642 | ZFCP_LOG_DEBUG("skipped reopen of failed unit 0x%016Lx " |
| 643 | "on port 0x%016Lx on adapter %s\n", |
| 644 | unit->fcp_lun, unit->port->wwpn, |
| 645 | zfcp_get_busid_by_unit(unit)); |
| 646 | debug_text_event(adapter->erp_dbf, 5, "u_ro_f"); |
| 647 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 648 | sizeof (fcp_lun_t)); |
| 649 | retval = -EIO; |
| 650 | goto out; |
| 651 | } |
| 652 | |
| 653 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 654 | adapter, unit->port, unit, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | out: |
| 656 | return retval; |
| 657 | } |
| 658 | |
| 659 | /** |
| 660 | * zfcp_erp_unit_reopen - initiate reopen of a unit |
| 661 | * @unit: unit to be reopened |
| 662 | * @clear_mask: specifies flags in unit status to be cleared |
| 663 | * Return: 0 on success, < 0 on error |
| 664 | * |
| 665 | * This is a wrappper for zfcp_erp_unit_reopen_internal. It ensures correct |
| 666 | * locking. An error recovery task is initiated to do the reopen. |
| 667 | * To wait for the completion of the reopen zfcp_erp_wait should be used. |
| 668 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 669 | int zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | { |
| 671 | int retval; |
| 672 | unsigned long flags; |
| 673 | struct zfcp_adapter *adapter; |
| 674 | struct zfcp_port *port; |
| 675 | |
| 676 | port = unit->port; |
| 677 | adapter = port->adapter; |
| 678 | |
| 679 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 680 | write_lock(&adapter->erp_lock); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 681 | retval = zfcp_erp_unit_reopen_internal(unit, clear_mask, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | write_unlock(&adapter->erp_lock); |
| 683 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 684 | |
| 685 | return retval; |
| 686 | } |
| 687 | |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 688 | /** |
| 689 | * zfcp_erp_adapter_block - mark adapter as blocked, block scsi requests |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | */ |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 691 | static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | { |
| 693 | debug_text_event(adapter->erp_dbf, 6, "a_bl"); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 694 | zfcp_erp_modify_adapter_status(adapter, 15, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | ZFCP_STATUS_COMMON_UNBLOCKED | |
| 696 | clear_mask, ZFCP_CLEAR); |
| 697 | } |
| 698 | |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 699 | /* FIXME: isn't really atomic */ |
| 700 | /* |
| 701 | * returns the mask which has not been set so far, i.e. |
| 702 | * 0 if no bit has been changed, !0 if some bit has been changed |
| 703 | */ |
| 704 | static int atomic_test_and_set_mask(unsigned long mask, atomic_t *v) |
| 705 | { |
| 706 | int changed_bits = (atomic_read(v) /*XOR*/^ mask) & mask; |
| 707 | atomic_set_mask(mask, v); |
| 708 | return changed_bits; |
| 709 | } |
| 710 | |
| 711 | /* FIXME: isn't really atomic */ |
| 712 | /* |
| 713 | * returns the mask which has not been cleared so far, i.e. |
| 714 | * 0 if no bit has been changed, !0 if some bit has been changed |
| 715 | */ |
| 716 | static int atomic_test_and_clear_mask(unsigned long mask, atomic_t *v) |
| 717 | { |
| 718 | int changed_bits = atomic_read(v) & mask; |
| 719 | atomic_clear_mask(mask, v); |
| 720 | return changed_bits; |
| 721 | } |
| 722 | |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 723 | /** |
| 724 | * zfcp_erp_adapter_unblock - mark adapter as unblocked, allow scsi requests |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | */ |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 726 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | { |
| 728 | debug_text_event(adapter->erp_dbf, 6, "a_ubl"); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 729 | if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| 730 | &adapter->status)) |
| 731 | zfcp_rec_dbf_event_adapter(16, 0, adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 735 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | * |
| 737 | * purpose: disable I/O, |
| 738 | * return any open requests and clean them up, |
| 739 | * aim: no pending and incoming I/O |
| 740 | * |
| 741 | * returns: |
| 742 | */ |
| 743 | static void |
| 744 | zfcp_erp_port_block(struct zfcp_port *port, int clear_mask) |
| 745 | { |
| 746 | struct zfcp_adapter *adapter = port->adapter; |
| 747 | |
| 748 | debug_text_event(adapter->erp_dbf, 6, "p_bl"); |
| 749 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 750 | zfcp_erp_modify_port_status(port, 17, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, |
| 752 | ZFCP_CLEAR); |
| 753 | } |
| 754 | |
| 755 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 756 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | * |
| 758 | * purpose: enable I/O |
| 759 | * |
| 760 | * returns: |
| 761 | */ |
| 762 | static void |
| 763 | zfcp_erp_port_unblock(struct zfcp_port *port) |
| 764 | { |
| 765 | struct zfcp_adapter *adapter = port->adapter; |
| 766 | |
| 767 | debug_text_event(adapter->erp_dbf, 6, "p_ubl"); |
| 768 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 769 | if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| 770 | &port->status)) |
| 771 | zfcp_rec_dbf_event_port(18, 0, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 775 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | * |
| 777 | * purpose: disable I/O, |
| 778 | * return any open requests and clean them up, |
| 779 | * aim: no pending and incoming I/O |
| 780 | * |
| 781 | * returns: |
| 782 | */ |
| 783 | static void |
| 784 | zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) |
| 785 | { |
| 786 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 787 | |
| 788 | debug_text_event(adapter->erp_dbf, 6, "u_bl"); |
| 789 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 790 | zfcp_erp_modify_unit_status(unit, 19, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, |
| 792 | ZFCP_CLEAR); |
| 793 | } |
| 794 | |
| 795 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 796 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | * |
| 798 | * purpose: enable I/O |
| 799 | * |
| 800 | * returns: |
| 801 | */ |
| 802 | static void |
| 803 | zfcp_erp_unit_unblock(struct zfcp_unit *unit) |
| 804 | { |
| 805 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 806 | |
| 807 | debug_text_event(adapter->erp_dbf, 6, "u_ubl"); |
| 808 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 809 | if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| 810 | &unit->status)) |
| 811 | zfcp_rec_dbf_event_unit(20, 0, unit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | } |
| 813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | static void |
| 815 | zfcp_erp_action_ready(struct zfcp_erp_action *erp_action) |
| 816 | { |
| 817 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 818 | |
| 819 | debug_text_event(adapter->erp_dbf, 4, "a_ar"); |
| 820 | debug_event(adapter->erp_dbf, 4, &erp_action->action, sizeof (int)); |
| 821 | |
| 822 | zfcp_erp_action_to_ready(erp_action); |
| 823 | up(&adapter->erp_ready_sem); |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 824 | zfcp_rec_dbf_event_thread(2, adapter, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 828 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | * |
| 830 | * purpose: |
| 831 | * |
| 832 | * returns: <0 erp_action not found in any list |
| 833 | * ZFCP_ERP_ACTION_READY erp_action is in ready list |
| 834 | * ZFCP_ERP_ACTION_RUNNING erp_action is in running list |
| 835 | * |
| 836 | * locks: erp_lock must be held |
| 837 | */ |
| 838 | static int |
| 839 | zfcp_erp_action_exists(struct zfcp_erp_action *erp_action) |
| 840 | { |
| 841 | int retval = -EINVAL; |
| 842 | struct list_head *entry; |
| 843 | struct zfcp_erp_action *entry_erp_action; |
| 844 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 845 | |
| 846 | /* search in running list */ |
| 847 | list_for_each(entry, &adapter->erp_running_head) { |
| 848 | entry_erp_action = |
| 849 | list_entry(entry, struct zfcp_erp_action, list); |
| 850 | if (entry_erp_action == erp_action) { |
| 851 | retval = ZFCP_ERP_ACTION_RUNNING; |
| 852 | goto out; |
| 853 | } |
| 854 | } |
| 855 | /* search in ready list */ |
| 856 | list_for_each(entry, &adapter->erp_ready_head) { |
| 857 | entry_erp_action = |
| 858 | list_entry(entry, struct zfcp_erp_action, list); |
| 859 | if (entry_erp_action == erp_action) { |
| 860 | retval = ZFCP_ERP_ACTION_READY; |
| 861 | goto out; |
| 862 | } |
| 863 | } |
| 864 | |
| 865 | out: |
| 866 | return retval; |
| 867 | } |
| 868 | |
| 869 | /* |
| 870 | * purpose: checks current status of action (timed out, dismissed, ...) |
| 871 | * and does appropriate preparations (dismiss fsf request, ...) |
| 872 | * |
| 873 | * locks: called under erp_lock (disabled interrupts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | */ |
Swen Schillig | ca880cf | 2007-02-09 10:00:14 +0100 | [diff] [blame] | 875 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) |
| 877 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 879 | |
| 880 | if (erp_action->fsf_req) { |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 881 | /* take lock to ensure that request is not deleted meanwhile */ |
| 882 | spin_lock(&adapter->req_list_lock); |
Heiko Carstens | d1ad09d | 2007-12-20 12:30:22 +0100 | [diff] [blame] | 883 | if (zfcp_reqlist_find_safe(adapter, erp_action->fsf_req) && |
| 884 | erp_action->fsf_req->erp_action == erp_action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | /* fsf_req still exists */ |
| 886 | debug_text_event(adapter->erp_dbf, 3, "a_ca_req"); |
Swen Schillig | ca880cf | 2007-02-09 10:00:14 +0100 | [diff] [blame] | 887 | debug_event(adapter->erp_dbf, 3, &erp_action->fsf_req, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | sizeof (unsigned long)); |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 889 | /* dismiss fsf_req of timed out/dismissed erp_action */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | if (erp_action->status & (ZFCP_STATUS_ERP_DISMISSED | |
| 891 | ZFCP_STATUS_ERP_TIMEDOUT)) { |
| 892 | debug_text_event(adapter->erp_dbf, 3, |
| 893 | "a_ca_disreq"); |
Swen Schillig | ca880cf | 2007-02-09 10:00:14 +0100 | [diff] [blame] | 894 | erp_action->fsf_req->status |= |
| 895 | ZFCP_STATUS_FSFREQ_DISMISSED; |
Martin Peschke | 6f4f365 | 2008-03-27 14:22:04 +0100 | [diff] [blame^] | 896 | zfcp_rec_dbf_event_action(142, erp_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | } |
| 898 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
Martin Peschke | 6f4f365 | 2008-03-27 14:22:04 +0100 | [diff] [blame^] | 899 | zfcp_rec_dbf_event_action(143, erp_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | ZFCP_LOG_NORMAL("error: erp step timed out " |
| 901 | "(action=%d, fsf_req=%p)\n ", |
| 902 | erp_action->action, |
| 903 | erp_action->fsf_req); |
| 904 | } |
| 905 | /* |
| 906 | * If fsf_req is neither dismissed nor completed |
| 907 | * then keep it running asynchronously and don't mess |
| 908 | * with the association of erp_action and fsf_req. |
| 909 | */ |
Swen Schillig | ca880cf | 2007-02-09 10:00:14 +0100 | [diff] [blame] | 910 | if (erp_action->fsf_req->status & |
| 911 | (ZFCP_STATUS_FSFREQ_COMPLETED | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | ZFCP_STATUS_FSFREQ_DISMISSED)) { |
| 913 | /* forget about association between fsf_req |
| 914 | and erp_action */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | erp_action->fsf_req = NULL; |
| 916 | } |
| 917 | } else { |
| 918 | debug_text_event(adapter->erp_dbf, 3, "a_ca_gonereq"); |
| 919 | /* |
| 920 | * even if this fsf_req has gone, forget about |
| 921 | * association between erp_action and fsf_req |
| 922 | */ |
| 923 | erp_action->fsf_req = NULL; |
| 924 | } |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 925 | spin_unlock(&adapter->req_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | } else |
| 927 | debug_text_event(adapter->erp_dbf, 3, "a_ca_noreq"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 930 | /** |
| 931 | * zfcp_erp_async_handler_nolock - complete erp_action |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | * |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 933 | * Used for normal completion, time-out, dismissal and failure after |
| 934 | * low memory condition. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | */ |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 936 | static void zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action, |
| 937 | unsigned long set_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 940 | |
| 941 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { |
| 942 | debug_text_event(adapter->erp_dbf, 2, "a_asyh_ex"); |
| 943 | debug_event(adapter->erp_dbf, 2, &erp_action->action, |
| 944 | sizeof (int)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | erp_action->status |= set_mask; |
| 946 | zfcp_erp_action_ready(erp_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } else { |
| 948 | /* action is ready or gone - nothing to do */ |
| 949 | debug_text_event(adapter->erp_dbf, 3, "a_asyh_gone"); |
| 950 | debug_event(adapter->erp_dbf, 3, &erp_action->action, |
| 951 | sizeof (int)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | } |
| 954 | |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 955 | /** |
| 956 | * zfcp_erp_async_handler - wrapper for erp_async_handler_nolock w/ locking |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | */ |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 958 | void zfcp_erp_async_handler(struct zfcp_erp_action *erp_action, |
| 959 | unsigned long set_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | { |
| 961 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 962 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
| 964 | write_lock_irqsave(&adapter->erp_lock, flags); |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 965 | zfcp_erp_async_handler_nolock(erp_action, set_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
| 968 | |
| 969 | /* |
| 970 | * purpose: is called for erp_action which was slept waiting for |
| 971 | * memory becoming avaliable, |
| 972 | * will trigger that this action will be continued |
| 973 | */ |
| 974 | static void |
| 975 | zfcp_erp_memwait_handler(unsigned long data) |
| 976 | { |
| 977 | struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; |
| 978 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 979 | |
| 980 | debug_text_event(adapter->erp_dbf, 2, "a_mwh"); |
| 981 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); |
| 982 | |
| 983 | zfcp_erp_async_handler(erp_action, 0); |
| 984 | } |
| 985 | |
| 986 | /* |
| 987 | * purpose: is called if an asynchronous erp step timed out, |
| 988 | * action gets an appropriate flag and will be processed |
| 989 | * accordingly |
| 990 | */ |
Heiko Carstens | 364c855 | 2007-10-12 16:11:35 +0200 | [diff] [blame] | 991 | static void zfcp_erp_timeout_handler(unsigned long data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | { |
| 993 | struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; |
| 994 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 995 | |
| 996 | debug_text_event(adapter->erp_dbf, 2, "a_th"); |
| 997 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); |
| 998 | |
| 999 | zfcp_erp_async_handler(erp_action, ZFCP_STATUS_ERP_TIMEDOUT); |
| 1000 | } |
| 1001 | |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 1002 | /** |
| 1003 | * zfcp_erp_action_dismiss - dismiss an erp_action |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | * |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 1005 | * adapter->erp_lock must be held |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1006 | * |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 1007 | * Dismissal of an erp_action is usually required if an erp_action of |
| 1008 | * higher priority is generated. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | */ |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 1010 | static void zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | { |
| 1012 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1013 | |
| 1014 | debug_text_event(adapter->erp_dbf, 2, "a_adis"); |
| 1015 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); |
| 1016 | |
Martin Peschke | d0076f7 | 2007-11-15 13:57:08 +0100 | [diff] [blame] | 1017 | erp_action->status |= ZFCP_STATUS_ERP_DISMISSED; |
| 1018 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) |
| 1019 | zfcp_erp_action_ready(erp_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | |
| 1022 | int |
| 1023 | zfcp_erp_thread_setup(struct zfcp_adapter *adapter) |
| 1024 | { |
| 1025 | int retval = 0; |
| 1026 | |
| 1027 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); |
| 1028 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD); |
| 1030 | if (retval < 0) { |
| 1031 | ZFCP_LOG_NORMAL("error: creation of erp thread failed for " |
| 1032 | "adapter %s\n", |
| 1033 | zfcp_get_busid_by_adapter(adapter)); |
| 1034 | debug_text_event(adapter->erp_dbf, 5, "a_thset_fail"); |
| 1035 | } else { |
| 1036 | wait_event(adapter->erp_thread_wqh, |
| 1037 | atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, |
| 1038 | &adapter->status)); |
| 1039 | debug_text_event(adapter->erp_dbf, 5, "a_thset_ok"); |
| 1040 | } |
| 1041 | |
| 1042 | return (retval < 0); |
| 1043 | } |
| 1044 | |
| 1045 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1046 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1048 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | * |
| 1050 | * returns: |
| 1051 | * |
| 1052 | * context: process (i.e. proc-fs or rmmod/insmod) |
| 1053 | * |
| 1054 | * note: The caller of this routine ensures that the specified |
| 1055 | * adapter has been shut down and that this operation |
| 1056 | * has been completed. Thus, there are no pending erp_actions |
| 1057 | * which would need to be handled here. |
| 1058 | */ |
| 1059 | int |
| 1060 | zfcp_erp_thread_kill(struct zfcp_adapter *adapter) |
| 1061 | { |
| 1062 | int retval = 0; |
| 1063 | |
| 1064 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status); |
| 1065 | up(&adapter->erp_ready_sem); |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 1066 | zfcp_rec_dbf_event_thread(2, adapter, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
| 1068 | wait_event(adapter->erp_thread_wqh, |
| 1069 | !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, |
| 1070 | &adapter->status)); |
| 1071 | |
| 1072 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, |
| 1073 | &adapter->status); |
| 1074 | |
| 1075 | debug_text_event(adapter->erp_dbf, 5, "a_thki_ok"); |
| 1076 | |
| 1077 | return retval; |
| 1078 | } |
| 1079 | |
| 1080 | /* |
| 1081 | * purpose: is run as a kernel thread, |
| 1082 | * goes through list of error recovery actions of associated adapter |
| 1083 | * and delegates single action to execution |
| 1084 | * |
| 1085 | * returns: 0 |
| 1086 | */ |
| 1087 | static int |
| 1088 | zfcp_erp_thread(void *data) |
| 1089 | { |
| 1090 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
| 1091 | struct list_head *next; |
| 1092 | struct zfcp_erp_action *erp_action; |
| 1093 | unsigned long flags; |
| 1094 | |
| 1095 | daemonize("zfcperp%s", zfcp_get_busid_by_adapter(adapter)); |
| 1096 | /* Block all signals */ |
| 1097 | siginitsetinv(¤t->blocked, 0); |
| 1098 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); |
| 1099 | debug_text_event(adapter->erp_dbf, 5, "a_th_run"); |
| 1100 | wake_up(&adapter->erp_thread_wqh); |
| 1101 | |
| 1102 | while (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, |
| 1103 | &adapter->status)) { |
| 1104 | |
| 1105 | write_lock_irqsave(&adapter->erp_lock, flags); |
Martin Peschke | 86e8dfc | 2007-11-15 13:57:17 +0100 | [diff] [blame] | 1106 | next = adapter->erp_ready_head.next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
| 1108 | |
| 1109 | if (next != &adapter->erp_ready_head) { |
| 1110 | erp_action = |
| 1111 | list_entry(next, struct zfcp_erp_action, list); |
| 1112 | /* |
| 1113 | * process action (incl. [re]moving it |
| 1114 | * from 'ready' queue) |
| 1115 | */ |
| 1116 | zfcp_erp_strategy(erp_action); |
| 1117 | } |
| 1118 | |
| 1119 | /* |
| 1120 | * sleep as long as there is nothing to do, i.e. |
| 1121 | * no action in 'ready' queue to be processed and |
| 1122 | * thread is not to be killed |
| 1123 | */ |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 1124 | zfcp_rec_dbf_event_thread(4, adapter, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | down_interruptible(&adapter->erp_ready_sem); |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 1126 | zfcp_rec_dbf_event_thread(5, adapter, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | debug_text_event(adapter->erp_dbf, 5, "a_th_woken"); |
| 1128 | } |
| 1129 | |
| 1130 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); |
| 1131 | debug_text_event(adapter->erp_dbf, 5, "a_th_stop"); |
| 1132 | wake_up(&adapter->erp_thread_wqh); |
| 1133 | |
| 1134 | return 0; |
| 1135 | } |
| 1136 | |
| 1137 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1138 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | * |
| 1140 | * purpose: drives single error recovery action and schedules higher and |
| 1141 | * subordinate actions, if necessary |
| 1142 | * |
| 1143 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 1144 | * ZFCP_ERP_SUCCEEDED - action finished successfully (deqd) |
| 1145 | * ZFCP_ERP_FAILED - action finished unsuccessfully (deqd) |
| 1146 | * ZFCP_ERP_EXIT - action finished (dequeued), offline |
| 1147 | * ZFCP_ERP_DISMISSED - action canceled (dequeued) |
| 1148 | */ |
| 1149 | static int |
| 1150 | zfcp_erp_strategy(struct zfcp_erp_action *erp_action) |
| 1151 | { |
| 1152 | int retval = 0; |
| 1153 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1154 | struct zfcp_port *port = erp_action->port; |
| 1155 | struct zfcp_unit *unit = erp_action->unit; |
| 1156 | int action = erp_action->action; |
| 1157 | u32 status = erp_action->status; |
| 1158 | unsigned long flags; |
| 1159 | |
| 1160 | /* serialise dismissing, timing out, moving, enqueueing */ |
| 1161 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 1162 | write_lock(&adapter->erp_lock); |
| 1163 | |
| 1164 | /* dequeue dismissed action and leave, if required */ |
| 1165 | retval = zfcp_erp_strategy_check_action(erp_action, retval); |
| 1166 | if (retval == ZFCP_ERP_DISMISSED) { |
| 1167 | debug_text_event(adapter->erp_dbf, 4, "a_st_dis1"); |
| 1168 | goto unlock; |
| 1169 | } |
| 1170 | |
| 1171 | /* |
| 1172 | * move action to 'running' queue before processing it |
| 1173 | * (to avoid a race condition regarding moving the |
| 1174 | * action to the 'running' queue and back) |
| 1175 | */ |
| 1176 | zfcp_erp_action_to_running(erp_action); |
| 1177 | |
| 1178 | /* |
| 1179 | * try to process action as far as possible, |
| 1180 | * no lock to allow for blocking operations (kmalloc, qdio, ...), |
| 1181 | * afterwards the lock is required again for the following reasons: |
| 1182 | * - dequeueing of finished action and enqueueing of |
| 1183 | * follow-up actions must be atomic so that any other |
| 1184 | * reopen-routine does not believe there is nothing to do |
| 1185 | * and that it is safe to enqueue something else, |
| 1186 | * - we want to force any control thread which is dismissing |
| 1187 | * actions to finish this before we decide about |
| 1188 | * necessary steps to be taken here further |
| 1189 | */ |
| 1190 | write_unlock(&adapter->erp_lock); |
| 1191 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 1192 | retval = zfcp_erp_strategy_do_action(erp_action); |
| 1193 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 1194 | write_lock(&adapter->erp_lock); |
| 1195 | |
| 1196 | /* |
| 1197 | * check for dismissed status again to avoid follow-up actions, |
Martin Peschke | 86e8dfc | 2007-11-15 13:57:17 +0100 | [diff] [blame] | 1198 | * failing of targets and so on for dismissed actions, |
| 1199 | * we go through down() here because there has been an up() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | */ |
Martin Peschke | 86e8dfc | 2007-11-15 13:57:17 +0100 | [diff] [blame] | 1201 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) |
| 1202 | retval = ZFCP_ERP_CONTINUES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
| 1204 | switch (retval) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | case ZFCP_ERP_NOMEM: |
| 1206 | /* no memory to continue immediately, let it sleep */ |
| 1207 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { |
| 1208 | ++adapter->erp_low_mem_count; |
| 1209 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; |
| 1210 | } |
| 1211 | /* This condition is true if there is no memory available |
| 1212 | for any erp_action on this adapter. This implies that there |
| 1213 | are no elements in the memory pool(s) left for erp_actions. |
| 1214 | This might happen if an erp_action that used a memory pool |
| 1215 | element was timed out. |
| 1216 | */ |
| 1217 | if (adapter->erp_total_count == adapter->erp_low_mem_count) { |
| 1218 | debug_text_event(adapter->erp_dbf, 3, "a_st_lowmem"); |
| 1219 | ZFCP_LOG_NORMAL("error: no mempool elements available, " |
| 1220 | "restarting I/O on adapter %s " |
| 1221 | "to free mempool\n", |
| 1222 | zfcp_get_busid_by_adapter(adapter)); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1223 | zfcp_erp_adapter_reopen_internal(adapter, 0, 66, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | } else { |
| 1225 | debug_text_event(adapter->erp_dbf, 2, "a_st_memw"); |
| 1226 | retval = zfcp_erp_strategy_memwait(erp_action); |
| 1227 | } |
| 1228 | goto unlock; |
| 1229 | case ZFCP_ERP_CONTINUES: |
| 1230 | /* leave since this action runs asynchronously */ |
| 1231 | debug_text_event(adapter->erp_dbf, 6, "a_st_cont"); |
| 1232 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { |
| 1233 | --adapter->erp_low_mem_count; |
| 1234 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; |
| 1235 | } |
| 1236 | goto unlock; |
| 1237 | } |
| 1238 | /* ok, finished action (whatever its result is) */ |
| 1239 | |
| 1240 | /* check for unrecoverable targets */ |
| 1241 | retval = zfcp_erp_strategy_check_target(erp_action, retval); |
| 1242 | |
| 1243 | /* action must be dequeued (here to allow for further ones) */ |
| 1244 | zfcp_erp_action_dequeue(erp_action); |
| 1245 | |
| 1246 | /* |
| 1247 | * put this target through the erp mill again if someone has |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1248 | * requested to change the status of a target being online |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | * to offline or the other way around |
| 1250 | * (old retval is preserved if nothing has to be done here) |
| 1251 | */ |
| 1252 | retval = zfcp_erp_strategy_statechange(action, status, adapter, |
| 1253 | port, unit, retval); |
| 1254 | |
| 1255 | /* |
| 1256 | * leave if target is in permanent error state or if |
| 1257 | * action is repeated in order to process state change |
| 1258 | */ |
| 1259 | if (retval == ZFCP_ERP_EXIT) { |
| 1260 | debug_text_event(adapter->erp_dbf, 2, "a_st_exit"); |
| 1261 | goto unlock; |
| 1262 | } |
| 1263 | |
| 1264 | /* trigger follow up actions */ |
| 1265 | zfcp_erp_strategy_followup_actions(action, adapter, port, unit, retval); |
| 1266 | |
| 1267 | unlock: |
| 1268 | write_unlock(&adapter->erp_lock); |
| 1269 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | if (retval != ZFCP_ERP_CONTINUES) |
| 1272 | zfcp_erp_action_cleanup(action, adapter, port, unit, retval); |
| 1273 | |
| 1274 | /* |
| 1275 | * a few tasks remain when the erp queues are empty |
| 1276 | * (don't do that if the last action evaluated was dismissed |
| 1277 | * since this clearly indicates that there is more to come) : |
| 1278 | * - close the name server port if it is open yet |
| 1279 | * (enqueues another [probably] final action) |
| 1280 | * - otherwise, wake up whoever wants to be woken when we are |
| 1281 | * done with erp |
| 1282 | */ |
| 1283 | if (retval != ZFCP_ERP_DISMISSED) |
| 1284 | zfcp_erp_strategy_check_queues(adapter); |
| 1285 | |
| 1286 | debug_text_event(adapter->erp_dbf, 6, "a_st_done"); |
| 1287 | |
| 1288 | return retval; |
| 1289 | } |
| 1290 | |
| 1291 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1292 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1294 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | * |
| 1296 | * returns: ZFCP_ERP_DISMISSED - if action has been dismissed |
| 1297 | * retval - otherwise |
| 1298 | */ |
| 1299 | static int |
| 1300 | zfcp_erp_strategy_check_action(struct zfcp_erp_action *erp_action, int retval) |
| 1301 | { |
| 1302 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1303 | |
| 1304 | zfcp_erp_strategy_check_fsfreq(erp_action); |
| 1305 | |
| 1306 | debug_event(adapter->erp_dbf, 5, &erp_action->action, sizeof (int)); |
| 1307 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { |
| 1308 | debug_text_event(adapter->erp_dbf, 3, "a_stcd_dis"); |
| 1309 | zfcp_erp_action_dequeue(erp_action); |
| 1310 | retval = ZFCP_ERP_DISMISSED; |
| 1311 | } else |
| 1312 | debug_text_event(adapter->erp_dbf, 5, "a_stcd_nodis"); |
| 1313 | |
| 1314 | return retval; |
| 1315 | } |
| 1316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | static int |
| 1318 | zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) |
| 1319 | { |
| 1320 | int retval = ZFCP_ERP_FAILED; |
| 1321 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1322 | |
| 1323 | /* |
| 1324 | * try to execute/continue action as far as possible, |
| 1325 | * note: no lock in subsequent strategy routines |
| 1326 | * (this allows these routine to call schedule, e.g. |
| 1327 | * kmalloc with such flags or qdio_initialize & friends) |
Joe Perches | 5d67d16 | 2008-01-26 14:11:20 +0100 | [diff] [blame] | 1328 | * Note: in case of timeout, the separate strategies will fail |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | * anyhow. No need for a special action. Even worse, a nameserver |
| 1330 | * failure would not wake up waiting ports without the call. |
| 1331 | */ |
| 1332 | switch (erp_action->action) { |
| 1333 | |
| 1334 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 1335 | retval = zfcp_erp_adapter_strategy(erp_action); |
| 1336 | break; |
| 1337 | |
| 1338 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 1339 | retval = zfcp_erp_port_forced_strategy(erp_action); |
| 1340 | break; |
| 1341 | |
| 1342 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 1343 | retval = zfcp_erp_port_strategy(erp_action); |
| 1344 | break; |
| 1345 | |
| 1346 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 1347 | retval = zfcp_erp_unit_strategy(erp_action); |
| 1348 | break; |
| 1349 | |
| 1350 | default: |
| 1351 | debug_text_exception(adapter->erp_dbf, 1, "a_stda_bug"); |
| 1352 | debug_event(adapter->erp_dbf, 1, &erp_action->action, |
| 1353 | sizeof (int)); |
| 1354 | ZFCP_LOG_NORMAL("bug: unknown erp action requested on " |
| 1355 | "adapter %s (action=%d)\n", |
| 1356 | zfcp_get_busid_by_adapter(erp_action->adapter), |
| 1357 | erp_action->action); |
| 1358 | } |
| 1359 | |
| 1360 | return retval; |
| 1361 | } |
| 1362 | |
| 1363 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1364 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | * |
| 1366 | * purpose: triggers retry of this action after a certain amount of time |
| 1367 | * by means of timer provided by erp_action |
| 1368 | * |
| 1369 | * returns: ZFCP_ERP_CONTINUES - erp_action sleeps in erp running queue |
| 1370 | */ |
| 1371 | static int |
| 1372 | zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) |
| 1373 | { |
| 1374 | int retval = ZFCP_ERP_CONTINUES; |
| 1375 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1376 | |
| 1377 | debug_text_event(adapter->erp_dbf, 6, "a_mwinit"); |
| 1378 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); |
| 1379 | init_timer(&erp_action->timer); |
| 1380 | erp_action->timer.function = zfcp_erp_memwait_handler; |
| 1381 | erp_action->timer.data = (unsigned long) erp_action; |
| 1382 | erp_action->timer.expires = jiffies + ZFCP_ERP_MEMWAIT_TIMEOUT; |
| 1383 | add_timer(&erp_action->timer); |
| 1384 | |
| 1385 | return retval; |
| 1386 | } |
| 1387 | |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1388 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | * function: zfcp_erp_adapter_failed |
| 1390 | * |
| 1391 | * purpose: sets the adapter and all underlying devices to ERP_FAILED |
| 1392 | * |
| 1393 | */ |
| 1394 | void |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1395 | zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1397 | zfcp_erp_modify_adapter_status(adapter, id, ref, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); |
| 1399 | ZFCP_LOG_NORMAL("adapter erp failed on adapter %s\n", |
| 1400 | zfcp_get_busid_by_adapter(adapter)); |
| 1401 | debug_text_event(adapter->erp_dbf, 2, "a_afail"); |
| 1402 | } |
| 1403 | |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1404 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | * function: zfcp_erp_port_failed |
| 1406 | * |
| 1407 | * purpose: sets the port and all underlying devices to ERP_FAILED |
| 1408 | * |
| 1409 | */ |
| 1410 | void |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1411 | zfcp_erp_port_failed(struct zfcp_port *port, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1413 | zfcp_erp_modify_port_status(port, id, ref, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); |
| 1415 | |
| 1416 | if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) |
| 1417 | ZFCP_LOG_NORMAL("port erp failed (adapter %s, " |
Christof Schmitt | 1d589ed | 2007-05-08 11:14:41 +0200 | [diff] [blame] | 1418 | "port d_id=0x%06x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | zfcp_get_busid_by_port(port), port->d_id); |
| 1420 | else |
| 1421 | ZFCP_LOG_NORMAL("port erp failed (adapter %s, wwpn=0x%016Lx)\n", |
| 1422 | zfcp_get_busid_by_port(port), port->wwpn); |
| 1423 | |
| 1424 | debug_text_event(port->adapter->erp_dbf, 2, "p_pfail"); |
| 1425 | debug_event(port->adapter->erp_dbf, 2, &port->wwpn, sizeof (wwn_t)); |
| 1426 | } |
| 1427 | |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1428 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | * function: zfcp_erp_unit_failed |
| 1430 | * |
| 1431 | * purpose: sets the unit to ERP_FAILED |
| 1432 | * |
| 1433 | */ |
| 1434 | void |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1435 | zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1437 | zfcp_erp_modify_unit_status(unit, id, ref, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); |
| 1439 | |
| 1440 | ZFCP_LOG_NORMAL("unit erp failed on unit 0x%016Lx on port 0x%016Lx " |
| 1441 | " on adapter %s\n", unit->fcp_lun, |
| 1442 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); |
| 1443 | debug_text_event(unit->port->adapter->erp_dbf, 2, "u_ufail"); |
| 1444 | debug_event(unit->port->adapter->erp_dbf, 2, |
| 1445 | &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 1446 | } |
| 1447 | |
| 1448 | /* |
| 1449 | * function: zfcp_erp_strategy_check_target |
| 1450 | * |
| 1451 | * purpose: increments the erp action count on the device currently in |
| 1452 | * recovery if the action failed or resets the count in case of |
| 1453 | * success. If a maximum count is exceeded the device is marked |
| 1454 | * as ERP_FAILED. |
| 1455 | * The 'blocked' state of a target which has been recovered |
| 1456 | * successfully is reset. |
| 1457 | * |
| 1458 | * returns: ZFCP_ERP_CONTINUES - action continues (not considered) |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1459 | * ZFCP_ERP_SUCCEEDED - action finished successfully |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | * ZFCP_ERP_EXIT - action failed and will not continue |
| 1461 | */ |
| 1462 | static int |
| 1463 | zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, int result) |
| 1464 | { |
| 1465 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1466 | struct zfcp_port *port = erp_action->port; |
| 1467 | struct zfcp_unit *unit = erp_action->unit; |
| 1468 | |
| 1469 | debug_text_event(adapter->erp_dbf, 5, "a_stct_norm"); |
| 1470 | debug_event(adapter->erp_dbf, 5, &erp_action->action, sizeof (int)); |
| 1471 | debug_event(adapter->erp_dbf, 5, &result, sizeof (int)); |
| 1472 | |
| 1473 | switch (erp_action->action) { |
| 1474 | |
| 1475 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 1476 | result = zfcp_erp_strategy_check_unit(unit, result); |
| 1477 | break; |
| 1478 | |
| 1479 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 1480 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 1481 | result = zfcp_erp_strategy_check_port(port, result); |
| 1482 | break; |
| 1483 | |
| 1484 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 1485 | result = zfcp_erp_strategy_check_adapter(adapter, result); |
| 1486 | break; |
| 1487 | } |
| 1488 | |
| 1489 | return result; |
| 1490 | } |
| 1491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | static int |
| 1493 | zfcp_erp_strategy_statechange(int action, |
| 1494 | u32 status, |
| 1495 | struct zfcp_adapter *adapter, |
| 1496 | struct zfcp_port *port, |
| 1497 | struct zfcp_unit *unit, int retval) |
| 1498 | { |
| 1499 | debug_text_event(adapter->erp_dbf, 3, "a_stsc"); |
| 1500 | debug_event(adapter->erp_dbf, 3, &action, sizeof (int)); |
| 1501 | |
| 1502 | switch (action) { |
| 1503 | |
| 1504 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 1505 | if (zfcp_erp_strategy_statechange_detected(&adapter->status, |
| 1506 | status)) { |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1507 | zfcp_erp_adapter_reopen_internal(adapter, |
| 1508 | ZFCP_STATUS_COMMON_ERP_FAILED, |
| 1509 | 67, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | retval = ZFCP_ERP_EXIT; |
| 1511 | } |
| 1512 | break; |
| 1513 | |
| 1514 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 1515 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 1516 | if (zfcp_erp_strategy_statechange_detected(&port->status, |
| 1517 | status)) { |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1518 | zfcp_erp_port_reopen_internal(port, |
| 1519 | ZFCP_STATUS_COMMON_ERP_FAILED, |
| 1520 | 68, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | retval = ZFCP_ERP_EXIT; |
| 1522 | } |
| 1523 | break; |
| 1524 | |
| 1525 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 1526 | if (zfcp_erp_strategy_statechange_detected(&unit->status, |
| 1527 | status)) { |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1528 | zfcp_erp_unit_reopen_internal(unit, |
| 1529 | ZFCP_STATUS_COMMON_ERP_FAILED, |
| 1530 | 69, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | retval = ZFCP_ERP_EXIT; |
| 1532 | } |
| 1533 | break; |
| 1534 | } |
| 1535 | |
| 1536 | return retval; |
| 1537 | } |
| 1538 | |
Heiko Carstens | 364c855 | 2007-10-12 16:11:35 +0200 | [diff] [blame] | 1539 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | zfcp_erp_strategy_statechange_detected(atomic_t * target_status, u32 erp_status) |
| 1541 | { |
| 1542 | return |
| 1543 | /* take it online */ |
| 1544 | (atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && |
| 1545 | (ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)) || |
| 1546 | /* take it offline */ |
| 1547 | (!atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && |
| 1548 | !(ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)); |
| 1549 | } |
| 1550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | static int |
| 1552 | zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) |
| 1553 | { |
| 1554 | debug_text_event(unit->port->adapter->erp_dbf, 5, "u_stct"); |
| 1555 | debug_event(unit->port->adapter->erp_dbf, 5, &unit->fcp_lun, |
| 1556 | sizeof (fcp_lun_t)); |
| 1557 | |
| 1558 | switch (result) { |
| 1559 | case ZFCP_ERP_SUCCEEDED : |
| 1560 | atomic_set(&unit->erp_counter, 0); |
| 1561 | zfcp_erp_unit_unblock(unit); |
| 1562 | break; |
| 1563 | case ZFCP_ERP_FAILED : |
| 1564 | atomic_inc(&unit->erp_counter); |
| 1565 | if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1566 | zfcp_erp_unit_failed(unit, 21, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | break; |
| 1568 | case ZFCP_ERP_EXIT : |
| 1569 | /* nothing */ |
| 1570 | break; |
| 1571 | } |
| 1572 | |
| 1573 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { |
| 1574 | zfcp_erp_unit_block(unit, 0); /* for ZFCP_ERP_SUCCEEDED */ |
| 1575 | result = ZFCP_ERP_EXIT; |
| 1576 | } |
| 1577 | |
| 1578 | return result; |
| 1579 | } |
| 1580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | static int |
| 1582 | zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) |
| 1583 | { |
| 1584 | debug_text_event(port->adapter->erp_dbf, 5, "p_stct"); |
| 1585 | debug_event(port->adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 1586 | |
| 1587 | switch (result) { |
| 1588 | case ZFCP_ERP_SUCCEEDED : |
| 1589 | atomic_set(&port->erp_counter, 0); |
| 1590 | zfcp_erp_port_unblock(port); |
| 1591 | break; |
| 1592 | case ZFCP_ERP_FAILED : |
| 1593 | atomic_inc(&port->erp_counter); |
| 1594 | if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1595 | zfcp_erp_port_failed(port, 22, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | break; |
| 1597 | case ZFCP_ERP_EXIT : |
| 1598 | /* nothing */ |
| 1599 | break; |
| 1600 | } |
| 1601 | |
| 1602 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { |
| 1603 | zfcp_erp_port_block(port, 0); /* for ZFCP_ERP_SUCCEEDED */ |
| 1604 | result = ZFCP_ERP_EXIT; |
| 1605 | } |
| 1606 | |
| 1607 | return result; |
| 1608 | } |
| 1609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | static int |
| 1611 | zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, int result) |
| 1612 | { |
| 1613 | debug_text_event(adapter->erp_dbf, 5, "a_stct"); |
| 1614 | |
| 1615 | switch (result) { |
| 1616 | case ZFCP_ERP_SUCCEEDED : |
| 1617 | atomic_set(&adapter->erp_counter, 0); |
| 1618 | zfcp_erp_adapter_unblock(adapter); |
| 1619 | break; |
| 1620 | case ZFCP_ERP_FAILED : |
| 1621 | atomic_inc(&adapter->erp_counter); |
| 1622 | if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1623 | zfcp_erp_adapter_failed(adapter, 23, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | break; |
| 1625 | case ZFCP_ERP_EXIT : |
| 1626 | /* nothing */ |
| 1627 | break; |
| 1628 | } |
| 1629 | |
| 1630 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { |
| 1631 | zfcp_erp_adapter_block(adapter, 0); /* for ZFCP_ERP_SUCCEEDED */ |
| 1632 | result = ZFCP_ERP_EXIT; |
| 1633 | } |
| 1634 | |
| 1635 | return result; |
| 1636 | } |
| 1637 | |
Christof Schmitt | 5f852be | 2007-05-08 11:16:52 +0200 | [diff] [blame] | 1638 | struct zfcp_erp_add_work { |
| 1639 | struct zfcp_unit *unit; |
| 1640 | struct work_struct work; |
| 1641 | }; |
| 1642 | |
| 1643 | /** |
| 1644 | * zfcp_erp_scsi_scan |
| 1645 | * @data: pointer to a struct zfcp_erp_add_work |
| 1646 | * |
| 1647 | * Registers a logical unit with the SCSI stack. |
| 1648 | */ |
| 1649 | static void zfcp_erp_scsi_scan(struct work_struct *work) |
| 1650 | { |
| 1651 | struct zfcp_erp_add_work *p = |
| 1652 | container_of(work, struct zfcp_erp_add_work, work); |
| 1653 | struct zfcp_unit *unit = p->unit; |
| 1654 | struct fc_rport *rport = unit->port->rport; |
| 1655 | scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, |
| 1656 | unit->scsi_lun, 0); |
| 1657 | atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); |
Christof Schmitt | 5f852be | 2007-05-08 11:16:52 +0200 | [diff] [blame] | 1658 | zfcp_unit_put(unit); |
| 1659 | kfree(p); |
| 1660 | } |
| 1661 | |
| 1662 | /** |
| 1663 | * zfcp_erp_schedule_work |
| 1664 | * @unit: pointer to unit which should be registered with SCSI stack |
| 1665 | * |
| 1666 | * Schedules work which registers a unit with the SCSI stack |
| 1667 | */ |
| 1668 | static void |
| 1669 | zfcp_erp_schedule_work(struct zfcp_unit *unit) |
| 1670 | { |
| 1671 | struct zfcp_erp_add_work *p; |
| 1672 | |
Swen Schillig | 0d66132 | 2007-07-18 10:55:08 +0200 | [diff] [blame] | 1673 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
Christof Schmitt | 5f852be | 2007-05-08 11:16:52 +0200 | [diff] [blame] | 1674 | if (!p) { |
| 1675 | ZFCP_LOG_NORMAL("error: Out of resources. Could not register " |
| 1676 | "the FCP-LUN 0x%Lx connected to " |
| 1677 | "the port with WWPN 0x%Lx connected to " |
| 1678 | "the adapter %s with the SCSI stack.\n", |
| 1679 | unit->fcp_lun, |
| 1680 | unit->port->wwpn, |
| 1681 | zfcp_get_busid_by_unit(unit)); |
| 1682 | return; |
| 1683 | } |
| 1684 | |
| 1685 | zfcp_unit_get(unit); |
Christof Schmitt | 5f852be | 2007-05-08 11:16:52 +0200 | [diff] [blame] | 1686 | atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); |
| 1687 | INIT_WORK(&p->work, zfcp_erp_scsi_scan); |
| 1688 | p->unit = unit; |
| 1689 | schedule_work(&p->work); |
| 1690 | } |
| 1691 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1693 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | * |
| 1695 | * purpose: remaining things in good cases, |
| 1696 | * escalation in bad cases |
| 1697 | * |
| 1698 | * returns: |
| 1699 | */ |
| 1700 | static int |
| 1701 | zfcp_erp_strategy_followup_actions(int action, |
| 1702 | struct zfcp_adapter *adapter, |
| 1703 | struct zfcp_port *port, |
| 1704 | struct zfcp_unit *unit, int status) |
| 1705 | { |
| 1706 | debug_text_event(adapter->erp_dbf, 5, "a_stfol"); |
| 1707 | debug_event(adapter->erp_dbf, 5, &action, sizeof (int)); |
| 1708 | |
| 1709 | /* initiate follow-up actions depending on success of finished action */ |
| 1710 | switch (action) { |
| 1711 | |
| 1712 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 1713 | if (status == ZFCP_ERP_SUCCEEDED) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1714 | zfcp_erp_port_reopen_all_internal(adapter, 0, 70, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | else |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1716 | zfcp_erp_adapter_reopen_internal(adapter, 0, 71, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | break; |
| 1718 | |
| 1719 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 1720 | if (status == ZFCP_ERP_SUCCEEDED) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1721 | zfcp_erp_port_reopen_internal(port, 0, 72, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | else |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1723 | zfcp_erp_adapter_reopen_internal(adapter, 0, 73, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | break; |
| 1725 | |
| 1726 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 1727 | if (status == ZFCP_ERP_SUCCEEDED) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1728 | zfcp_erp_unit_reopen_all_internal(port, 0, 74, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | else |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1730 | zfcp_erp_port_forced_reopen_internal(port, 0, 75, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | break; |
| 1732 | |
| 1733 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
Heiko Carstens | cc16ceb | 2007-08-28 09:30:42 +0200 | [diff] [blame] | 1734 | /* Nothing to do if status == ZFCP_ERP_SUCCEEDED */ |
| 1735 | if (status != ZFCP_ERP_SUCCEEDED) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1736 | zfcp_erp_port_reopen_internal(unit->port, 0, 76, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | break; |
| 1738 | } |
| 1739 | |
| 1740 | return 0; |
| 1741 | } |
| 1742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | static int |
| 1744 | zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter) |
| 1745 | { |
| 1746 | unsigned long flags; |
| 1747 | |
| 1748 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 1749 | read_lock(&adapter->erp_lock); |
| 1750 | if (list_empty(&adapter->erp_ready_head) && |
| 1751 | list_empty(&adapter->erp_running_head)) { |
| 1752 | debug_text_event(adapter->erp_dbf, 4, "a_cq_wake"); |
| 1753 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, |
| 1754 | &adapter->status); |
| 1755 | wake_up(&adapter->erp_done_wqh); |
| 1756 | } else |
| 1757 | debug_text_event(adapter->erp_dbf, 5, "a_cq_notempty"); |
| 1758 | read_unlock(&adapter->erp_lock); |
| 1759 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 1760 | |
| 1761 | return 0; |
| 1762 | } |
| 1763 | |
| 1764 | /** |
| 1765 | * zfcp_erp_wait - wait for completion of error recovery on an adapter |
| 1766 | * @adapter: adapter for which to wait for completion of its error recovery |
| 1767 | * Return: 0 |
| 1768 | */ |
| 1769 | int |
| 1770 | zfcp_erp_wait(struct zfcp_adapter *adapter) |
| 1771 | { |
| 1772 | int retval = 0; |
| 1773 | |
| 1774 | wait_event(adapter->erp_done_wqh, |
| 1775 | !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, |
| 1776 | &adapter->status)); |
| 1777 | |
| 1778 | return retval; |
| 1779 | } |
| 1780 | |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1781 | void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, u8 id, |
| 1782 | u64 ref, u32 mask, int set_or_clear) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | { |
| 1784 | struct zfcp_port *port; |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1785 | u32 changed, common_mask = mask & ZFCP_COMMON_FLAGS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | |
| 1787 | if (set_or_clear == ZFCP_SET) { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1788 | changed = atomic_test_and_set_mask(mask, &adapter->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | debug_text_event(adapter->erp_dbf, 3, "a_mod_as_s"); |
| 1790 | } else { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1791 | changed = atomic_test_and_clear_mask(mask, &adapter->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) |
| 1793 | atomic_set(&adapter->erp_counter, 0); |
| 1794 | debug_text_event(adapter->erp_dbf, 3, "a_mod_as_c"); |
| 1795 | } |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1796 | if (changed) |
| 1797 | zfcp_rec_dbf_event_adapter(id, ref, adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | debug_event(adapter->erp_dbf, 3, &mask, sizeof (u32)); |
| 1799 | |
| 1800 | /* Deal with all underlying devices, only pass common_mask */ |
| 1801 | if (common_mask) |
| 1802 | list_for_each_entry(port, &adapter->port_list_head, list) |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1803 | zfcp_erp_modify_port_status(port, id, ref, common_mask, |
| 1804 | set_or_clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | } |
| 1806 | |
| 1807 | /* |
| 1808 | * function: zfcp_erp_modify_port_status |
| 1809 | * |
| 1810 | * purpose: sets the port and all underlying devices to ERP_FAILED |
| 1811 | * |
| 1812 | */ |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1813 | void zfcp_erp_modify_port_status(struct zfcp_port *port, u8 id, u64 ref, |
| 1814 | u32 mask, int set_or_clear) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | { |
| 1816 | struct zfcp_unit *unit; |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1817 | u32 changed, common_mask = mask & ZFCP_COMMON_FLAGS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | |
| 1819 | if (set_or_clear == ZFCP_SET) { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1820 | changed = atomic_test_and_set_mask(mask, &port->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | debug_text_event(port->adapter->erp_dbf, 3, "p_mod_ps_s"); |
| 1822 | } else { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1823 | changed = atomic_test_and_clear_mask(mask, &port->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) |
| 1825 | atomic_set(&port->erp_counter, 0); |
| 1826 | debug_text_event(port->adapter->erp_dbf, 3, "p_mod_ps_c"); |
| 1827 | } |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1828 | if (changed) |
| 1829 | zfcp_rec_dbf_event_port(id, ref, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | debug_event(port->adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); |
| 1831 | debug_event(port->adapter->erp_dbf, 3, &mask, sizeof (u32)); |
| 1832 | |
| 1833 | /* Modify status of all underlying devices, only pass common mask */ |
| 1834 | if (common_mask) |
| 1835 | list_for_each_entry(unit, &port->unit_list_head, list) |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1836 | zfcp_erp_modify_unit_status(unit, id, ref, common_mask, |
| 1837 | set_or_clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | } |
| 1839 | |
| 1840 | /* |
| 1841 | * function: zfcp_erp_modify_unit_status |
| 1842 | * |
| 1843 | * purpose: sets the unit to ERP_FAILED |
| 1844 | * |
| 1845 | */ |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1846 | void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u8 id, u64 ref, |
| 1847 | u32 mask, int set_or_clear) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1849 | u32 changed; |
| 1850 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | if (set_or_clear == ZFCP_SET) { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1852 | changed = atomic_test_and_set_mask(mask, &unit->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | debug_text_event(unit->port->adapter->erp_dbf, 3, "u_mod_us_s"); |
| 1854 | } else { |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1855 | changed = atomic_test_and_clear_mask(mask, &unit->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { |
| 1857 | atomic_set(&unit->erp_counter, 0); |
| 1858 | } |
| 1859 | debug_text_event(unit->port->adapter->erp_dbf, 3, "u_mod_us_c"); |
| 1860 | } |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 1861 | if (changed) |
| 1862 | zfcp_rec_dbf_event_unit(id, ref, unit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | debug_event(unit->port->adapter->erp_dbf, 3, &unit->fcp_lun, |
| 1864 | sizeof (fcp_lun_t)); |
| 1865 | debug_event(unit->port->adapter->erp_dbf, 3, &mask, sizeof (u32)); |
| 1866 | } |
| 1867 | |
| 1868 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1869 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | * |
| 1871 | * purpose: Wrappper for zfcp_erp_port_reopen_all_internal |
| 1872 | * used to ensure the correct locking |
| 1873 | * |
Andreas Mohr | d6e05ed | 2006-06-26 18:35:02 +0200 | [diff] [blame] | 1874 | * returns: 0 - initiated action successfully |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | * <0 - failed to initiate action |
| 1876 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1877 | int zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, int clear_mask, |
| 1878 | u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | { |
| 1880 | int retval; |
| 1881 | unsigned long flags; |
| 1882 | |
| 1883 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 1884 | write_lock(&adapter->erp_lock); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1885 | retval = zfcp_erp_port_reopen_all_internal(adapter, clear_mask, id, |
| 1886 | ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | write_unlock(&adapter->erp_lock); |
| 1888 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 1889 | |
| 1890 | return retval; |
| 1891 | } |
| 1892 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1893 | static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *adapter, |
| 1894 | int clear_mask, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | { |
| 1896 | int retval = 0; |
| 1897 | struct zfcp_port *port; |
| 1898 | |
| 1899 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 1900 | if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1901 | zfcp_erp_port_reopen_internal(port, clear_mask, id, |
| 1902 | ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | |
| 1904 | return retval; |
| 1905 | } |
| 1906 | |
| 1907 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1908 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1910 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | * |
| 1912 | * returns: FIXME |
| 1913 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1914 | static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *port, |
| 1915 | int clear_mask, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | { |
| 1917 | int retval = 0; |
| 1918 | struct zfcp_unit *unit; |
| 1919 | |
| 1920 | list_for_each_entry(unit, &port->unit_list_head, list) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 1921 | zfcp_erp_unit_reopen_internal(unit, clear_mask, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | |
| 1923 | return retval; |
| 1924 | } |
| 1925 | |
| 1926 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1927 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | * |
| 1929 | * purpose: this routine executes the 'Reopen Adapter' action |
| 1930 | * (the entire action is processed synchronously, since |
| 1931 | * there are no actions which might be run concurrently |
| 1932 | * per definition) |
| 1933 | * |
| 1934 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully |
| 1935 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 1936 | */ |
| 1937 | static int |
| 1938 | zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action) |
| 1939 | { |
| 1940 | int retval; |
| 1941 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 1942 | |
| 1943 | retval = zfcp_erp_adapter_strategy_close(erp_action); |
| 1944 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
| 1945 | retval = ZFCP_ERP_EXIT; |
| 1946 | else |
| 1947 | retval = zfcp_erp_adapter_strategy_open(erp_action); |
| 1948 | |
| 1949 | debug_text_event(adapter->erp_dbf, 3, "a_ast/ret"); |
| 1950 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); |
| 1951 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); |
| 1952 | |
| 1953 | if (retval == ZFCP_ERP_FAILED) { |
| 1954 | ZFCP_LOG_INFO("Waiting to allow the adapter %s " |
| 1955 | "to recover itself\n", |
| 1956 | zfcp_get_busid_by_adapter(adapter)); |
Christof Schmitt | 18edcdb | 2007-11-05 12:37:45 +0100 | [diff] [blame] | 1957 | ssleep(ZFCP_TYPE2_RECOVERY_TIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | } |
| 1959 | |
| 1960 | return retval; |
| 1961 | } |
| 1962 | |
| 1963 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1964 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1966 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | * |
| 1968 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully |
| 1969 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 1970 | */ |
| 1971 | static int |
| 1972 | zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *erp_action) |
| 1973 | { |
| 1974 | int retval; |
| 1975 | |
| 1976 | atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, |
| 1977 | &erp_action->adapter->status); |
| 1978 | retval = zfcp_erp_adapter_strategy_generic(erp_action, 1); |
| 1979 | atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, |
| 1980 | &erp_action->adapter->status); |
| 1981 | |
| 1982 | return retval; |
| 1983 | } |
| 1984 | |
| 1985 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1986 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1988 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | * |
| 1990 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully |
| 1991 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 1992 | */ |
| 1993 | static int |
| 1994 | zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *erp_action) |
| 1995 | { |
| 1996 | int retval; |
| 1997 | |
| 1998 | atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, |
| 1999 | &erp_action->adapter->status); |
| 2000 | retval = zfcp_erp_adapter_strategy_generic(erp_action, 0); |
| 2001 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, |
| 2002 | &erp_action->adapter->status); |
| 2003 | |
| 2004 | return retval; |
| 2005 | } |
| 2006 | |
| 2007 | /* |
| 2008 | * function: zfcp_register_adapter |
| 2009 | * |
| 2010 | * purpose: allocate the irq associated with this devno and register |
| 2011 | * the FSF adapter with the SCSI stack |
| 2012 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2013 | * returns: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | */ |
| 2015 | static int |
| 2016 | zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close) |
| 2017 | { |
| 2018 | int retval = ZFCP_ERP_SUCCEEDED; |
| 2019 | |
| 2020 | if (close) |
| 2021 | goto close_only; |
| 2022 | |
| 2023 | retval = zfcp_erp_adapter_strategy_open_qdio(erp_action); |
| 2024 | if (retval != ZFCP_ERP_SUCCEEDED) |
| 2025 | goto failed_qdio; |
| 2026 | |
| 2027 | retval = zfcp_erp_adapter_strategy_open_fsf(erp_action); |
| 2028 | if (retval != ZFCP_ERP_SUCCEEDED) |
| 2029 | goto failed_openfcp; |
| 2030 | |
| 2031 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &erp_action->adapter->status); |
| 2032 | goto out; |
| 2033 | |
| 2034 | close_only: |
| 2035 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, |
| 2036 | &erp_action->adapter->status); |
| 2037 | |
| 2038 | failed_openfcp: |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 2039 | zfcp_close_fsf(erp_action->adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | failed_qdio: |
Volker Sameske | c7f6b3a | 2007-05-29 15:29:49 +0200 | [diff] [blame] | 2041 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | |
| 2042 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | |
| 2043 | ZFCP_STATUS_ADAPTER_XPORT_OK, |
| 2044 | &erp_action->adapter->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | out: |
| 2046 | return retval; |
| 2047 | } |
| 2048 | |
| 2049 | /* |
| 2050 | * function: zfcp_qdio_init |
| 2051 | * |
| 2052 | * purpose: setup QDIO operation for specified adapter |
| 2053 | * |
| 2054 | * returns: 0 - successful setup |
| 2055 | * !0 - failed setup |
| 2056 | */ |
Heiko Carstens | 364c855 | 2007-10-12 16:11:35 +0200 | [diff] [blame] | 2057 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action) |
| 2059 | { |
| 2060 | int retval; |
| 2061 | int i; |
| 2062 | volatile struct qdio_buffer_element *sbale; |
| 2063 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2064 | |
| 2065 | if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { |
| 2066 | ZFCP_LOG_NORMAL("bug: second attempt to set up QDIO on " |
| 2067 | "adapter %s\n", |
| 2068 | zfcp_get_busid_by_adapter(adapter)); |
| 2069 | goto failed_sanity; |
| 2070 | } |
| 2071 | |
| 2072 | if (qdio_establish(&adapter->qdio_init_data) != 0) { |
| 2073 | ZFCP_LOG_INFO("error: establishment of QDIO queues failed " |
| 2074 | "on adapter %s\n", |
| 2075 | zfcp_get_busid_by_adapter(adapter)); |
| 2076 | goto failed_qdio_establish; |
| 2077 | } |
| 2078 | debug_text_event(adapter->erp_dbf, 3, "qdio_est"); |
| 2079 | |
| 2080 | if (qdio_activate(adapter->ccw_device, 0) != 0) { |
| 2081 | ZFCP_LOG_INFO("error: activation of QDIO queues failed " |
| 2082 | "on adapter %s\n", |
| 2083 | zfcp_get_busid_by_adapter(adapter)); |
| 2084 | goto failed_qdio_activate; |
| 2085 | } |
| 2086 | debug_text_event(adapter->erp_dbf, 3, "qdio_act"); |
| 2087 | |
| 2088 | /* |
| 2089 | * put buffers into response queue, |
| 2090 | */ |
| 2091 | for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { |
| 2092 | sbale = &(adapter->response_queue.buffer[i]->element[0]); |
| 2093 | sbale->length = 0; |
| 2094 | sbale->flags = SBAL_FLAGS_LAST_ENTRY; |
Al Viro | 6aae873 | 2006-10-10 22:44:27 +0100 | [diff] [blame] | 2095 | sbale->addr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | } |
| 2097 | |
| 2098 | ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " |
| 2099 | "queue_no=%i, index_in_queue=%i, count=%i)\n", |
| 2100 | zfcp_get_busid_by_adapter(adapter), |
| 2101 | QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q); |
| 2102 | |
| 2103 | retval = do_QDIO(adapter->ccw_device, |
| 2104 | QDIO_FLAG_SYNC_INPUT, |
| 2105 | 0, 0, QDIO_MAX_BUFFERS_PER_Q, NULL); |
| 2106 | |
| 2107 | if (retval) { |
| 2108 | ZFCP_LOG_NORMAL("bug: setup of QDIO failed (retval=%d)\n", |
| 2109 | retval); |
| 2110 | goto failed_do_qdio; |
| 2111 | } else { |
| 2112 | adapter->response_queue.free_index = 0; |
| 2113 | atomic_set(&adapter->response_queue.free_count, 0); |
| 2114 | ZFCP_LOG_DEBUG("%i buffers successfully enqueued to " |
| 2115 | "response queue\n", QDIO_MAX_BUFFERS_PER_Q); |
| 2116 | } |
| 2117 | /* set index of first avalable SBALS / number of available SBALS */ |
| 2118 | adapter->request_queue.free_index = 0; |
| 2119 | atomic_set(&adapter->request_queue.free_count, QDIO_MAX_BUFFERS_PER_Q); |
| 2120 | adapter->request_queue.distance_from_int = 0; |
| 2121 | |
| 2122 | /* initialize waitqueue used to wait for free SBALs in requests queue */ |
| 2123 | init_waitqueue_head(&adapter->request_wq); |
| 2124 | |
| 2125 | /* ok, we did it - skip all cleanups for different failures */ |
| 2126 | atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); |
| 2127 | retval = ZFCP_ERP_SUCCEEDED; |
| 2128 | goto out; |
| 2129 | |
| 2130 | failed_do_qdio: |
| 2131 | /* NOP */ |
| 2132 | |
| 2133 | failed_qdio_activate: |
| 2134 | debug_text_event(adapter->erp_dbf, 3, "qdio_down1a"); |
| 2135 | while (qdio_shutdown(adapter->ccw_device, |
| 2136 | QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) |
Christof Schmitt | 18edcdb | 2007-11-05 12:37:45 +0100 | [diff] [blame] | 2137 | ssleep(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | debug_text_event(adapter->erp_dbf, 3, "qdio_down1b"); |
| 2139 | |
| 2140 | failed_qdio_establish: |
| 2141 | failed_sanity: |
| 2142 | retval = ZFCP_ERP_FAILED; |
| 2143 | |
| 2144 | out: |
| 2145 | return retval; |
| 2146 | } |
| 2147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | static int |
| 2150 | zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action) |
| 2151 | { |
Andreas Herrmann | 2448c45 | 2005-12-01 02:50:36 +0100 | [diff] [blame] | 2152 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | |
Andreas Herrmann | 2448c45 | 2005-12-01 02:50:36 +0100 | [diff] [blame] | 2154 | retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action); |
| 2155 | if (retval == ZFCP_ERP_FAILED) |
| 2156 | return ZFCP_ERP_FAILED; |
| 2157 | |
| 2158 | retval = zfcp_erp_adapter_strategy_open_fsf_xport(erp_action); |
| 2159 | if (retval == ZFCP_ERP_FAILED) |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 2160 | return ZFCP_ERP_FAILED; |
| 2161 | |
| 2162 | return zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | } |
| 2164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | static int |
| 2166 | zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) |
| 2167 | { |
| 2168 | int retval = ZFCP_ERP_SUCCEEDED; |
| 2169 | int retries; |
Andreas Herrmann | 22753fa | 2005-06-13 13:15:15 +0200 | [diff] [blame] | 2170 | int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2172 | |
| 2173 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | |
Andreas Herrmann | 22753fa | 2005-06-13 13:15:15 +0200 | [diff] [blame] | 2175 | for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
| 2177 | &adapter->status); |
| 2178 | ZFCP_LOG_DEBUG("Doing exchange config data\n"); |
Heiko Carstens | 9f09c54 | 2006-07-03 17:32:20 -0700 | [diff] [blame] | 2179 | write_lock_irq(&adapter->erp_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | zfcp_erp_action_to_running(erp_action); |
Heiko Carstens | 9f09c54 | 2006-07-03 17:32:20 -0700 | [diff] [blame] | 2181 | write_unlock_irq(&adapter->erp_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | if (zfcp_fsf_exchange_config_data(erp_action)) { |
| 2183 | retval = ZFCP_ERP_FAILED; |
| 2184 | debug_text_event(adapter->erp_dbf, 5, "a_fstx_xf"); |
| 2185 | ZFCP_LOG_INFO("error: initiation of exchange of " |
| 2186 | "configuration data failed for " |
| 2187 | "adapter %s\n", |
| 2188 | zfcp_get_busid_by_adapter(adapter)); |
| 2189 | break; |
| 2190 | } |
| 2191 | debug_text_event(adapter->erp_dbf, 6, "a_fstx_xok"); |
| 2192 | ZFCP_LOG_DEBUG("Xchange underway\n"); |
| 2193 | |
| 2194 | /* |
| 2195 | * Why this works: |
| 2196 | * Both the normal completion handler as well as the timeout |
| 2197 | * handler will do an 'up' when the 'exchange config data' |
| 2198 | * request completes or times out. Thus, the signal to go on |
| 2199 | * won't be lost utilizing this semaphore. |
| 2200 | * Furthermore, this 'adapter_reopen' action is |
| 2201 | * guaranteed to be the only action being there (highest action |
| 2202 | * which prevents other actions from being created). |
| 2203 | * Resulting from that, the wake signal recognized here |
| 2204 | * _must_ be the one belonging to the 'exchange config |
| 2205 | * data' request. |
| 2206 | */ |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 2207 | zfcp_rec_dbf_event_thread(6, adapter, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | down(&adapter->erp_ready_sem); |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 2209 | zfcp_rec_dbf_event_thread(7, adapter, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
| 2211 | ZFCP_LOG_INFO("error: exchange of configuration data " |
| 2212 | "for adapter %s timed out\n", |
| 2213 | zfcp_get_busid_by_adapter(adapter)); |
| 2214 | break; |
| 2215 | } |
Andreas Herrmann | 22753fa | 2005-06-13 13:15:15 +0200 | [diff] [blame] | 2216 | |
| 2217 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
| 2218 | &adapter->status)) |
| 2219 | break; |
| 2220 | |
| 2221 | ZFCP_LOG_DEBUG("host connection still initialising... " |
| 2222 | "waiting and retrying...\n"); |
| 2223 | /* sleep a little bit before retry */ |
Christof Schmitt | 18edcdb | 2007-11-05 12:37:45 +0100 | [diff] [blame] | 2224 | ssleep(sleep); |
Andreas Herrmann | 22753fa | 2005-06-13 13:15:15 +0200 | [diff] [blame] | 2225 | sleep *= 2; |
| 2226 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | |
Volker Sameske | c7f6b3a | 2007-05-29 15:29:49 +0200 | [diff] [blame] | 2228 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
| 2229 | &adapter->status); |
| 2230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, |
| 2232 | &adapter->status)) { |
| 2233 | ZFCP_LOG_INFO("error: exchange of configuration data for " |
| 2234 | "adapter %s failed\n", |
| 2235 | zfcp_get_busid_by_adapter(adapter)); |
| 2236 | retval = ZFCP_ERP_FAILED; |
| 2237 | } |
| 2238 | |
| 2239 | return retval; |
| 2240 | } |
| 2241 | |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 2242 | static int |
| 2243 | zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action) |
| 2244 | { |
Andreas Herrmann | 2448c45 | 2005-12-01 02:50:36 +0100 | [diff] [blame] | 2245 | int ret; |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2246 | struct zfcp_adapter *adapter; |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 2247 | |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2248 | adapter = erp_action->adapter; |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 2249 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); |
| 2250 | |
Heiko Carstens | 9f09c54 | 2006-07-03 17:32:20 -0700 | [diff] [blame] | 2251 | write_lock_irq(&adapter->erp_lock); |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2252 | zfcp_erp_action_to_running(erp_action); |
Heiko Carstens | 9f09c54 | 2006-07-03 17:32:20 -0700 | [diff] [blame] | 2253 | write_unlock_irq(&adapter->erp_lock); |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 2254 | |
Swen Schillig | 52ef11a | 2007-08-28 09:31:09 +0200 | [diff] [blame] | 2255 | ret = zfcp_fsf_exchange_port_data(erp_action); |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2256 | if (ret == -EOPNOTSUPP) { |
| 2257 | debug_text_event(adapter->erp_dbf, 3, "a_xport_notsupp"); |
| 2258 | return ZFCP_ERP_SUCCEEDED; |
| 2259 | } else if (ret) { |
| 2260 | debug_text_event(adapter->erp_dbf, 3, "a_xport_failed"); |
| 2261 | return ZFCP_ERP_FAILED; |
| 2262 | } |
| 2263 | debug_text_event(adapter->erp_dbf, 6, "a_xport_ok"); |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 2264 | |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2265 | ret = ZFCP_ERP_SUCCEEDED; |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 2266 | zfcp_rec_dbf_event_thread(8, adapter, 1); |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2267 | down(&adapter->erp_ready_sem); |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 2268 | zfcp_rec_dbf_event_thread(9, adapter, 1); |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2269 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
| 2270 | ZFCP_LOG_INFO("error: exchange port data timed out (adapter " |
| 2271 | "%s)\n", zfcp_get_busid_by_adapter(adapter)); |
| 2272 | ret = ZFCP_ERP_FAILED; |
| 2273 | } |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 2274 | |
| 2275 | /* don't treat as error for the sake of compatibility */ |
| 2276 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status)) |
| 2277 | ZFCP_LOG_INFO("warning: exchange port data failed (adapter " |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2278 | "%s\n", zfcp_get_busid_by_adapter(adapter)); |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 2279 | |
Andreas Herrmann | 2f8f3ed | 2006-02-11 01:41:50 +0100 | [diff] [blame] | 2280 | return ret; |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 2281 | } |
| 2282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | static int |
| 2284 | zfcp_erp_adapter_strategy_open_fsf_statusread(struct zfcp_erp_action |
| 2285 | *erp_action) |
| 2286 | { |
| 2287 | int retval = ZFCP_ERP_SUCCEEDED; |
| 2288 | int temp_ret; |
| 2289 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2290 | int i; |
| 2291 | |
| 2292 | adapter->status_read_failed = 0; |
| 2293 | for (i = 0; i < ZFCP_STATUS_READS_RECOM; i++) { |
| 2294 | temp_ret = zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL); |
| 2295 | if (temp_ret < 0) { |
| 2296 | ZFCP_LOG_INFO("error: set-up of unsolicited status " |
| 2297 | "notification failed on adapter %s\n", |
| 2298 | zfcp_get_busid_by_adapter(adapter)); |
| 2299 | retval = ZFCP_ERP_FAILED; |
| 2300 | i--; |
| 2301 | break; |
| 2302 | } |
| 2303 | } |
| 2304 | |
| 2305 | return retval; |
| 2306 | } |
| 2307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2309 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2310 | * |
| 2311 | * purpose: this routine executes the 'Reopen Physical Port' action |
| 2312 | * |
| 2313 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2314 | * ZFCP_ERP_SUCCEEDED - action finished successfully |
| 2315 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2316 | */ |
| 2317 | static int |
| 2318 | zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) |
| 2319 | { |
| 2320 | int retval = ZFCP_ERP_FAILED; |
| 2321 | struct zfcp_port *port = erp_action->port; |
| 2322 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2323 | |
| 2324 | switch (erp_action->step) { |
| 2325 | |
| 2326 | /* |
| 2327 | * FIXME: |
| 2328 | * the ULP spec. begs for waiting for oustanding commands |
| 2329 | */ |
| 2330 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2331 | zfcp_erp_port_strategy_clearstati(port); |
| 2332 | /* |
| 2333 | * it would be sufficient to test only the normal open flag |
| 2334 | * since the phys. open flag cannot be set if the normal |
| 2335 | * open flag is unset - however, this is for readabilty ... |
| 2336 | */ |
| 2337 | if (atomic_test_mask((ZFCP_STATUS_PORT_PHYS_OPEN | |
| 2338 | ZFCP_STATUS_COMMON_OPEN), |
| 2339 | &port->status)) { |
| 2340 | ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " |
| 2341 | "close physical\n", port->wwpn); |
| 2342 | retval = |
| 2343 | zfcp_erp_port_forced_strategy_close(erp_action); |
| 2344 | } else |
| 2345 | retval = ZFCP_ERP_FAILED; |
| 2346 | break; |
| 2347 | |
| 2348 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: |
| 2349 | if (atomic_test_mask(ZFCP_STATUS_PORT_PHYS_OPEN, |
| 2350 | &port->status)) { |
| 2351 | ZFCP_LOG_DEBUG("close physical failed for port " |
| 2352 | "0x%016Lx\n", port->wwpn); |
| 2353 | retval = ZFCP_ERP_FAILED; |
| 2354 | } else |
| 2355 | retval = ZFCP_ERP_SUCCEEDED; |
| 2356 | break; |
| 2357 | } |
| 2358 | |
| 2359 | debug_text_event(adapter->erp_dbf, 3, "p_pfst/ret"); |
| 2360 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); |
| 2361 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); |
| 2362 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); |
| 2363 | |
| 2364 | return retval; |
| 2365 | } |
| 2366 | |
| 2367 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2368 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | * |
| 2370 | * purpose: this routine executes the 'Reopen Port' action |
| 2371 | * |
| 2372 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2373 | * ZFCP_ERP_SUCCEEDED - action finished successfully |
| 2374 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2375 | */ |
| 2376 | static int |
| 2377 | zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) |
| 2378 | { |
| 2379 | int retval = ZFCP_ERP_FAILED; |
| 2380 | struct zfcp_port *port = erp_action->port; |
| 2381 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2382 | |
| 2383 | switch (erp_action->step) { |
| 2384 | |
| 2385 | /* |
| 2386 | * FIXME: |
| 2387 | * the ULP spec. begs for waiting for oustanding commands |
| 2388 | */ |
| 2389 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2390 | zfcp_erp_port_strategy_clearstati(port); |
| 2391 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { |
| 2392 | ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " |
| 2393 | "close\n", port->wwpn); |
| 2394 | retval = zfcp_erp_port_strategy_close(erp_action); |
| 2395 | goto out; |
| 2396 | } /* else it's already closed, open it */ |
| 2397 | break; |
| 2398 | |
| 2399 | case ZFCP_ERP_STEP_PORT_CLOSING: |
| 2400 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { |
| 2401 | ZFCP_LOG_DEBUG("close failed for port 0x%016Lx\n", |
| 2402 | port->wwpn); |
| 2403 | retval = ZFCP_ERP_FAILED; |
| 2404 | goto out; |
| 2405 | } /* else it's closed now, open it */ |
| 2406 | break; |
| 2407 | } |
| 2408 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
| 2409 | retval = ZFCP_ERP_EXIT; |
| 2410 | else |
| 2411 | retval = zfcp_erp_port_strategy_open(erp_action); |
| 2412 | |
| 2413 | out: |
| 2414 | debug_text_event(adapter->erp_dbf, 3, "p_pst/ret"); |
| 2415 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); |
| 2416 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); |
| 2417 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); |
| 2418 | |
| 2419 | return retval; |
| 2420 | } |
| 2421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | static int |
| 2423 | zfcp_erp_port_strategy_open(struct zfcp_erp_action *erp_action) |
| 2424 | { |
| 2425 | int retval; |
| 2426 | |
| 2427 | if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, |
| 2428 | &erp_action->port->status)) |
| 2429 | retval = zfcp_erp_port_strategy_open_nameserver(erp_action); |
| 2430 | else |
| 2431 | retval = zfcp_erp_port_strategy_open_common(erp_action); |
| 2432 | |
| 2433 | return retval; |
| 2434 | } |
| 2435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | static int |
| 2437 | zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *erp_action) |
| 2438 | { |
| 2439 | int retval = 0; |
| 2440 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2441 | struct zfcp_port *port = erp_action->port; |
| 2442 | |
| 2443 | switch (erp_action->step) { |
| 2444 | |
| 2445 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2446 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: |
| 2447 | case ZFCP_ERP_STEP_PORT_CLOSING: |
Andreas Herrmann | ad757cd | 2006-01-13 02:26:11 +0100 | [diff] [blame] | 2448 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) { |
| 6f71d9b | 2005-04-10 23:04:28 -0500 | [diff] [blame] | 2449 | if (port->wwpn != adapter->peer_wwpn) { |
| 2450 | ZFCP_LOG_NORMAL("Failed to open port 0x%016Lx " |
| 2451 | "on adapter %s.\nPeer WWPN " |
| 2452 | "0x%016Lx does not match\n", |
| 2453 | port->wwpn, |
| 2454 | zfcp_get_busid_by_adapter(adapter), |
| 2455 | adapter->peer_wwpn); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 2456 | zfcp_erp_port_failed(port, 25, 0); |
| 6f71d9b | 2005-04-10 23:04:28 -0500 | [diff] [blame] | 2457 | retval = ZFCP_ERP_FAILED; |
| 2458 | break; |
| 2459 | } |
| 2460 | port->d_id = adapter->peer_d_id; |
| 2461 | atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); |
| 2462 | retval = zfcp_erp_port_strategy_open_port(erp_action); |
| 2463 | break; |
| 2464 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | if (!(adapter->nameserver_port)) { |
| 2466 | retval = zfcp_nameserver_enqueue(adapter); |
| 2467 | if (retval != 0) { |
| 2468 | ZFCP_LOG_NORMAL("error: nameserver port " |
| 2469 | "unavailable for adapter %s\n", |
| 2470 | zfcp_get_busid_by_adapter(adapter)); |
| 2471 | retval = ZFCP_ERP_FAILED; |
| 2472 | break; |
| 2473 | } |
| 2474 | } |
| 2475 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
| 2476 | &adapter->nameserver_port->status)) { |
| 2477 | ZFCP_LOG_DEBUG("nameserver port is not open -> open " |
| 2478 | "nameserver port\n"); |
| 2479 | /* nameserver port may live again */ |
| 2480 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, |
| 2481 | &adapter->nameserver_port->status); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 2482 | if (zfcp_erp_port_reopen(adapter->nameserver_port, 0, |
| 2483 | 77, (u64)erp_action) >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2484 | erp_action->step = |
| 2485 | ZFCP_ERP_STEP_NAMESERVER_OPEN; |
| 2486 | retval = ZFCP_ERP_CONTINUES; |
| 2487 | } else |
| 2488 | retval = ZFCP_ERP_FAILED; |
| 2489 | break; |
| 2490 | } |
| 2491 | /* else nameserver port is already open, fall through */ |
| 2492 | case ZFCP_ERP_STEP_NAMESERVER_OPEN: |
| 2493 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, |
| 2494 | &adapter->nameserver_port->status)) { |
| 2495 | ZFCP_LOG_DEBUG("open failed for nameserver port\n"); |
| 2496 | retval = ZFCP_ERP_FAILED; |
| 2497 | } else { |
| 2498 | ZFCP_LOG_DEBUG("nameserver port is open -> " |
| 2499 | "nameserver look-up for port 0x%016Lx\n", |
| 2500 | port->wwpn); |
| 2501 | retval = zfcp_erp_port_strategy_open_common_lookup |
| 2502 | (erp_action); |
| 2503 | } |
| 2504 | break; |
| 2505 | |
| 2506 | case ZFCP_ERP_STEP_NAMESERVER_LOOKUP: |
| 2507 | if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) { |
| 2508 | if (atomic_test_mask |
| 2509 | (ZFCP_STATUS_PORT_INVALID_WWPN, &port->status)) { |
| 2510 | ZFCP_LOG_DEBUG("nameserver look-up failed " |
| 2511 | "for port 0x%016Lx " |
| 2512 | "(misconfigured WWPN?)\n", |
| 2513 | port->wwpn); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 2514 | zfcp_erp_port_failed(port, 26, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | retval = ZFCP_ERP_EXIT; |
| 2516 | } else { |
| 2517 | ZFCP_LOG_DEBUG("nameserver look-up failed for " |
| 2518 | "port 0x%016Lx\n", port->wwpn); |
| 2519 | retval = ZFCP_ERP_FAILED; |
| 2520 | } |
| 2521 | } else { |
Christof Schmitt | 1d589ed | 2007-05-08 11:14:41 +0200 | [diff] [blame] | 2522 | ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%06x -> " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | "trying open\n", port->wwpn, port->d_id); |
| 2524 | retval = zfcp_erp_port_strategy_open_port(erp_action); |
| 2525 | } |
| 2526 | break; |
| 2527 | |
| 2528 | case ZFCP_ERP_STEP_PORT_OPENING: |
| 2529 | /* D_ID might have changed during open */ |
| 2530 | if (atomic_test_mask((ZFCP_STATUS_COMMON_OPEN | |
| 2531 | ZFCP_STATUS_PORT_DID_DID), |
| 2532 | &port->status)) { |
| 2533 | ZFCP_LOG_DEBUG("port 0x%016Lx is open\n", port->wwpn); |
| 2534 | retval = ZFCP_ERP_SUCCEEDED; |
| 2535 | } else { |
| 2536 | ZFCP_LOG_DEBUG("open failed for port 0x%016Lx\n", |
| 2537 | port->wwpn); |
| 2538 | retval = ZFCP_ERP_FAILED; |
| 2539 | } |
| 2540 | break; |
| 2541 | |
| 2542 | default: |
| 2543 | ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", |
| 2544 | erp_action->step); |
| 2545 | retval = ZFCP_ERP_FAILED; |
| 2546 | } |
| 2547 | |
| 2548 | return retval; |
| 2549 | } |
| 2550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2551 | static int |
| 2552 | zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *erp_action) |
| 2553 | { |
| 2554 | int retval; |
| 2555 | struct zfcp_port *port = erp_action->port; |
| 2556 | |
| 2557 | switch (erp_action->step) { |
| 2558 | |
| 2559 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2560 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: |
| 2561 | case ZFCP_ERP_STEP_PORT_CLOSING: |
Christof Schmitt | 1d589ed | 2007-05-08 11:14:41 +0200 | [diff] [blame] | 2562 | ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%06x -> trying open\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | port->wwpn, port->d_id); |
| 2564 | retval = zfcp_erp_port_strategy_open_port(erp_action); |
| 2565 | break; |
| 2566 | |
| 2567 | case ZFCP_ERP_STEP_PORT_OPENING: |
| 2568 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { |
| 2569 | ZFCP_LOG_DEBUG("WKA port is open\n"); |
| 2570 | retval = ZFCP_ERP_SUCCEEDED; |
| 2571 | } else { |
| 2572 | ZFCP_LOG_DEBUG("open failed for WKA port\n"); |
| 2573 | retval = ZFCP_ERP_FAILED; |
| 2574 | } |
| 2575 | /* this is needed anyway (dont care for retval of wakeup) */ |
| 2576 | ZFCP_LOG_DEBUG("continue other open port operations\n"); |
| 2577 | zfcp_erp_port_strategy_open_nameserver_wakeup(erp_action); |
| 2578 | break; |
| 2579 | |
| 2580 | default: |
| 2581 | ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", |
| 2582 | erp_action->step); |
| 2583 | retval = ZFCP_ERP_FAILED; |
| 2584 | } |
| 2585 | |
| 2586 | return retval; |
| 2587 | } |
| 2588 | |
| 2589 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2590 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | * |
| 2592 | * purpose: makes the erp thread continue with reopen (physical) port |
| 2593 | * actions which have been paused until the name server port |
| 2594 | * is opened (or failed) |
| 2595 | * |
| 2596 | * returns: 0 (a kind of void retval, its not used) |
| 2597 | */ |
| 2598 | static int |
| 2599 | zfcp_erp_port_strategy_open_nameserver_wakeup(struct zfcp_erp_action |
| 2600 | *ns_erp_action) |
| 2601 | { |
| 2602 | int retval = 0; |
| 2603 | unsigned long flags; |
| 2604 | struct zfcp_adapter *adapter = ns_erp_action->adapter; |
| 2605 | struct zfcp_erp_action *erp_action, *tmp; |
| 2606 | |
| 2607 | read_lock_irqsave(&adapter->erp_lock, flags); |
| 2608 | list_for_each_entry_safe(erp_action, tmp, &adapter->erp_running_head, |
| 2609 | list) { |
| 2610 | debug_text_event(adapter->erp_dbf, 4, "p_pstnsw_n"); |
| 2611 | debug_event(adapter->erp_dbf, 4, &erp_action->port->wwpn, |
| 2612 | sizeof (wwn_t)); |
| 2613 | if (erp_action->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) { |
| 2614 | debug_text_event(adapter->erp_dbf, 3, "p_pstnsw_w"); |
| 2615 | debug_event(adapter->erp_dbf, 3, |
| 2616 | &erp_action->port->wwpn, sizeof (wwn_t)); |
| 2617 | if (atomic_test_mask( |
| 2618 | ZFCP_STATUS_COMMON_ERP_FAILED, |
| 2619 | &adapter->nameserver_port->status)) |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 2620 | zfcp_erp_port_failed(erp_action->port, 27, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2621 | zfcp_erp_action_ready(erp_action); |
| 2622 | } |
| 2623 | } |
| 2624 | read_unlock_irqrestore(&adapter->erp_lock, flags); |
| 2625 | |
| 2626 | return retval; |
| 2627 | } |
| 2628 | |
| 2629 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2630 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2632 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | * |
| 2634 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2635 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2636 | */ |
| 2637 | static int |
| 2638 | zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *erp_action) |
| 2639 | { |
| 2640 | int retval; |
| 2641 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2642 | struct zfcp_port *port = erp_action->port; |
| 2643 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | retval = zfcp_fsf_close_physical_port(erp_action); |
| 2645 | if (retval == -ENOMEM) { |
| 2646 | debug_text_event(adapter->erp_dbf, 5, "o_pfstc_nomem"); |
| 2647 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2648 | retval = ZFCP_ERP_NOMEM; |
| 2649 | goto out; |
| 2650 | } |
| 2651 | erp_action->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; |
| 2652 | if (retval != 0) { |
| 2653 | debug_text_event(adapter->erp_dbf, 5, "o_pfstc_cpf"); |
| 2654 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2655 | /* could not send 'open', fail */ |
| 2656 | retval = ZFCP_ERP_FAILED; |
| 2657 | goto out; |
| 2658 | } |
| 2659 | debug_text_event(adapter->erp_dbf, 6, "o_pfstc_cpok"); |
| 2660 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 2661 | retval = ZFCP_ERP_CONTINUES; |
| 2662 | out: |
| 2663 | return retval; |
| 2664 | } |
| 2665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2666 | static int |
| 2667 | zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) |
| 2668 | { |
| 2669 | int retval = 0; |
| 2670 | struct zfcp_adapter *adapter = port->adapter; |
| 2671 | |
| 2672 | debug_text_event(adapter->erp_dbf, 5, "p_pstclst"); |
| 2673 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2674 | |
| 2675 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | |
| 2676 | ZFCP_STATUS_COMMON_CLOSING | |
| 2677 | ZFCP_STATUS_COMMON_ACCESS_DENIED | |
| 2678 | ZFCP_STATUS_PORT_DID_DID | |
| 2679 | ZFCP_STATUS_PORT_PHYS_CLOSING | |
| 2680 | ZFCP_STATUS_PORT_INVALID_WWPN, |
| 2681 | &port->status); |
| 2682 | return retval; |
| 2683 | } |
| 2684 | |
| 2685 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2686 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2687 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2688 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | * |
| 2690 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2691 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2692 | */ |
| 2693 | static int |
| 2694 | zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) |
| 2695 | { |
| 2696 | int retval; |
| 2697 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2698 | struct zfcp_port *port = erp_action->port; |
| 2699 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | retval = zfcp_fsf_close_port(erp_action); |
| 2701 | if (retval == -ENOMEM) { |
| 2702 | debug_text_event(adapter->erp_dbf, 5, "p_pstc_nomem"); |
| 2703 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2704 | retval = ZFCP_ERP_NOMEM; |
| 2705 | goto out; |
| 2706 | } |
| 2707 | erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; |
| 2708 | if (retval != 0) { |
| 2709 | debug_text_event(adapter->erp_dbf, 5, "p_pstc_cpf"); |
| 2710 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2711 | /* could not send 'close', fail */ |
| 2712 | retval = ZFCP_ERP_FAILED; |
| 2713 | goto out; |
| 2714 | } |
| 2715 | debug_text_event(adapter->erp_dbf, 6, "p_pstc_cpok"); |
| 2716 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 2717 | retval = ZFCP_ERP_CONTINUES; |
| 2718 | out: |
| 2719 | return retval; |
| 2720 | } |
| 2721 | |
| 2722 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2723 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2724 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2725 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | * |
| 2727 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2728 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2729 | */ |
| 2730 | static int |
| 2731 | zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) |
| 2732 | { |
| 2733 | int retval; |
| 2734 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2735 | struct zfcp_port *port = erp_action->port; |
| 2736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2737 | retval = zfcp_fsf_open_port(erp_action); |
| 2738 | if (retval == -ENOMEM) { |
| 2739 | debug_text_event(adapter->erp_dbf, 5, "p_psto_nomem"); |
| 2740 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2741 | retval = ZFCP_ERP_NOMEM; |
| 2742 | goto out; |
| 2743 | } |
| 2744 | erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; |
| 2745 | if (retval != 0) { |
| 2746 | debug_text_event(adapter->erp_dbf, 5, "p_psto_opf"); |
| 2747 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2748 | /* could not send 'open', fail */ |
| 2749 | retval = ZFCP_ERP_FAILED; |
| 2750 | goto out; |
| 2751 | } |
| 2752 | debug_text_event(adapter->erp_dbf, 6, "p_psto_opok"); |
| 2753 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 2754 | retval = ZFCP_ERP_CONTINUES; |
| 2755 | out: |
| 2756 | return retval; |
| 2757 | } |
| 2758 | |
| 2759 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2760 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2761 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2762 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2763 | * |
| 2764 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2765 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2766 | */ |
| 2767 | static int |
| 2768 | zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *erp_action) |
| 2769 | { |
| 2770 | int retval; |
| 2771 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2772 | struct zfcp_port *port = erp_action->port; |
| 2773 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2774 | retval = zfcp_ns_gid_pn_request(erp_action); |
| 2775 | if (retval == -ENOMEM) { |
| 2776 | debug_text_event(adapter->erp_dbf, 5, "p_pstn_nomem"); |
| 2777 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2778 | retval = ZFCP_ERP_NOMEM; |
| 2779 | goto out; |
| 2780 | } |
| 2781 | erp_action->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP; |
| 2782 | if (retval != 0) { |
| 2783 | debug_text_event(adapter->erp_dbf, 5, "p_pstn_ref"); |
| 2784 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 2785 | /* could not send nameserver request, fail */ |
| 2786 | retval = ZFCP_ERP_FAILED; |
| 2787 | goto out; |
| 2788 | } |
| 2789 | debug_text_event(adapter->erp_dbf, 6, "p_pstn_reok"); |
| 2790 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); |
| 2791 | retval = ZFCP_ERP_CONTINUES; |
| 2792 | out: |
| 2793 | return retval; |
| 2794 | } |
| 2795 | |
| 2796 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2797 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | * |
| 2799 | * purpose: this routine executes the 'Reopen Unit' action |
| 2800 | * currently no retries |
| 2801 | * |
| 2802 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2803 | * ZFCP_ERP_SUCCEEDED - action finished successfully |
| 2804 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2805 | */ |
| 2806 | static int |
| 2807 | zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) |
| 2808 | { |
| 2809 | int retval = ZFCP_ERP_FAILED; |
| 2810 | struct zfcp_unit *unit = erp_action->unit; |
| 2811 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2812 | |
| 2813 | switch (erp_action->step) { |
| 2814 | |
| 2815 | /* |
| 2816 | * FIXME: |
| 2817 | * the ULP spec. begs for waiting for oustanding commands |
| 2818 | */ |
| 2819 | case ZFCP_ERP_STEP_UNINITIALIZED: |
| 2820 | zfcp_erp_unit_strategy_clearstati(unit); |
| 2821 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { |
| 2822 | ZFCP_LOG_DEBUG("unit 0x%016Lx is open -> " |
| 2823 | "trying close\n", unit->fcp_lun); |
| 2824 | retval = zfcp_erp_unit_strategy_close(erp_action); |
| 2825 | break; |
| 2826 | } |
| 2827 | /* else it's already closed, fall through */ |
| 2828 | case ZFCP_ERP_STEP_UNIT_CLOSING: |
| 2829 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { |
| 2830 | ZFCP_LOG_DEBUG("close failed for unit 0x%016Lx\n", |
| 2831 | unit->fcp_lun); |
| 2832 | retval = ZFCP_ERP_FAILED; |
| 2833 | } else { |
| 2834 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
| 2835 | retval = ZFCP_ERP_EXIT; |
| 2836 | else { |
| 2837 | ZFCP_LOG_DEBUG("unit 0x%016Lx is not open -> " |
| 2838 | "trying open\n", unit->fcp_lun); |
| 2839 | retval = |
| 2840 | zfcp_erp_unit_strategy_open(erp_action); |
| 2841 | } |
| 2842 | } |
| 2843 | break; |
| 2844 | |
| 2845 | case ZFCP_ERP_STEP_UNIT_OPENING: |
| 2846 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { |
| 2847 | ZFCP_LOG_DEBUG("unit 0x%016Lx is open\n", |
| 2848 | unit->fcp_lun); |
| 2849 | retval = ZFCP_ERP_SUCCEEDED; |
| 2850 | } else { |
| 2851 | ZFCP_LOG_DEBUG("open failed for unit 0x%016Lx\n", |
| 2852 | unit->fcp_lun); |
| 2853 | retval = ZFCP_ERP_FAILED; |
| 2854 | } |
| 2855 | break; |
| 2856 | } |
| 2857 | |
| 2858 | debug_text_event(adapter->erp_dbf, 3, "u_ust/ret"); |
| 2859 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 2860 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); |
| 2861 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); |
| 2862 | return retval; |
| 2863 | } |
| 2864 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2865 | static int |
| 2866 | zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) |
| 2867 | { |
| 2868 | int retval = 0; |
| 2869 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 2870 | |
| 2871 | debug_text_event(adapter->erp_dbf, 5, "u_ustclst"); |
| 2872 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 2873 | |
| 2874 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | |
| 2875 | ZFCP_STATUS_COMMON_CLOSING | |
| 2876 | ZFCP_STATUS_COMMON_ACCESS_DENIED | |
| 2877 | ZFCP_STATUS_UNIT_SHARED | |
| 2878 | ZFCP_STATUS_UNIT_READONLY, |
| 2879 | &unit->status); |
| 2880 | |
| 2881 | return retval; |
| 2882 | } |
| 2883 | |
| 2884 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2885 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2886 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2887 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2888 | * |
| 2889 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2890 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2891 | */ |
| 2892 | static int |
| 2893 | zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) |
| 2894 | { |
| 2895 | int retval; |
| 2896 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2897 | struct zfcp_unit *unit = erp_action->unit; |
| 2898 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2899 | retval = zfcp_fsf_close_unit(erp_action); |
| 2900 | if (retval == -ENOMEM) { |
| 2901 | debug_text_event(adapter->erp_dbf, 5, "u_ustc_nomem"); |
| 2902 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 2903 | sizeof (fcp_lun_t)); |
| 2904 | retval = ZFCP_ERP_NOMEM; |
| 2905 | goto out; |
| 2906 | } |
| 2907 | erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; |
| 2908 | if (retval != 0) { |
| 2909 | debug_text_event(adapter->erp_dbf, 5, "u_ustc_cuf"); |
| 2910 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 2911 | sizeof (fcp_lun_t)); |
| 2912 | /* could not send 'close', fail */ |
| 2913 | retval = ZFCP_ERP_FAILED; |
| 2914 | goto out; |
| 2915 | } |
| 2916 | debug_text_event(adapter->erp_dbf, 6, "u_ustc_cuok"); |
| 2917 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 2918 | retval = ZFCP_ERP_CONTINUES; |
| 2919 | |
| 2920 | out: |
| 2921 | return retval; |
| 2922 | } |
| 2923 | |
| 2924 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2925 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2926 | * |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2927 | * purpose: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2928 | * |
| 2929 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) |
| 2930 | * ZFCP_ERP_FAILED - action finished unsuccessfully |
| 2931 | */ |
| 2932 | static int |
| 2933 | zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) |
| 2934 | { |
| 2935 | int retval; |
| 2936 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 2937 | struct zfcp_unit *unit = erp_action->unit; |
| 2938 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2939 | retval = zfcp_fsf_open_unit(erp_action); |
| 2940 | if (retval == -ENOMEM) { |
| 2941 | debug_text_event(adapter->erp_dbf, 5, "u_usto_nomem"); |
| 2942 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 2943 | sizeof (fcp_lun_t)); |
| 2944 | retval = ZFCP_ERP_NOMEM; |
| 2945 | goto out; |
| 2946 | } |
| 2947 | erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; |
| 2948 | if (retval != 0) { |
| 2949 | debug_text_event(adapter->erp_dbf, 5, "u_usto_ouf"); |
| 2950 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, |
| 2951 | sizeof (fcp_lun_t)); |
| 2952 | /* could not send 'open', fail */ |
| 2953 | retval = ZFCP_ERP_FAILED; |
| 2954 | goto out; |
| 2955 | } |
| 2956 | debug_text_event(adapter->erp_dbf, 6, "u_usto_ouok"); |
| 2957 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 2958 | retval = ZFCP_ERP_CONTINUES; |
| 2959 | out: |
| 2960 | return retval; |
| 2961 | } |
| 2962 | |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 2963 | void zfcp_erp_start_timer(struct zfcp_fsf_req *fsf_req) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2964 | { |
Andreas Herrmann | 2abbe86 | 2006-09-18 22:29:56 +0200 | [diff] [blame] | 2965 | BUG_ON(!fsf_req->erp_action); |
| 2966 | fsf_req->timer.function = zfcp_erp_timeout_handler; |
| 2967 | fsf_req->timer.data = (unsigned long) fsf_req->erp_action; |
| 2968 | fsf_req->timer.expires = jiffies + ZFCP_ERP_FSFREQ_TIMEOUT; |
| 2969 | add_timer(&fsf_req->timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2970 | } |
| 2971 | |
| 2972 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 2973 | * function: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | * |
| 2975 | * purpose: enqueue the specified error recovery action, if needed |
| 2976 | * |
| 2977 | * returns: |
| 2978 | */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 2979 | static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, |
| 2980 | struct zfcp_port *port, |
| 2981 | struct zfcp_unit *unit, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2982 | { |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 2983 | int retval = 1, need = want; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2984 | struct zfcp_erp_action *erp_action = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2985 | u32 status = 0; |
| 2986 | |
| 2987 | /* |
| 2988 | * We need some rules here which check whether we really need |
| 2989 | * this action or whether we should just drop it. |
| 2990 | * E.g. if there is a unfinished 'Reopen Port' request then we drop a |
| 2991 | * 'Reopen Unit' request for an associated unit since we can't |
| 2992 | * satisfy this request now. A 'Reopen Port' action will trigger |
| 2993 | * 'Reopen Unit' actions when it completes. |
| 2994 | * Thus, there are only actions in the queue which can immediately be |
| 2995 | * executed. This makes the processing of the action queue more |
| 2996 | * efficient. |
| 2997 | */ |
| 2998 | |
| 2999 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, |
| 3000 | &adapter->status)) |
| 3001 | return -EIO; |
| 3002 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3003 | debug_event(adapter->erp_dbf, 4, &want, sizeof (int)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3004 | /* check whether we really need this */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3005 | switch (want) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3006 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 3007 | if (atomic_test_mask |
| 3008 | (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) { |
| 3009 | debug_text_event(adapter->erp_dbf, 4, "u_actenq_drp"); |
| 3010 | debug_event(adapter->erp_dbf, 4, &port->wwpn, |
| 3011 | sizeof (wwn_t)); |
| 3012 | debug_event(adapter->erp_dbf, 4, &unit->fcp_lun, |
| 3013 | sizeof (fcp_lun_t)); |
| 3014 | goto out; |
| 3015 | } |
| 3016 | if (!atomic_test_mask |
| 3017 | (ZFCP_STATUS_COMMON_RUNNING, &port->status) || |
| 3018 | atomic_test_mask |
| 3019 | (ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { |
| 3020 | goto out; |
| 3021 | } |
| 3022 | if (!atomic_test_mask |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3023 | (ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) |
| 3024 | need = ZFCP_ERP_ACTION_REOPEN_PORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | /* fall through !!! */ |
| 3026 | |
| 3027 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 3028 | if (atomic_test_mask |
| 3029 | (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) { |
| 3030 | debug_text_event(adapter->erp_dbf, 4, "p_actenq_drp"); |
| 3031 | debug_event(adapter->erp_dbf, 4, &port->wwpn, |
| 3032 | sizeof (wwn_t)); |
| 3033 | goto out; |
| 3034 | } |
| 3035 | /* fall through !!! */ |
| 3036 | |
| 3037 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
Andreas Herrmann | 3734d24 | 2005-09-13 21:47:11 +0200 | [diff] [blame] | 3038 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, |
| 3039 | &port->status)) { |
| 3040 | if (port->erp_action.action != |
| 3041 | ZFCP_ERP_ACTION_REOPEN_PORT_FORCED) { |
| 3042 | ZFCP_LOG_INFO("dropped erp action %i (port " |
| 3043 | "0x%016Lx, action in use: %i)\n", |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3044 | want, port->wwpn, |
Andreas Herrmann | 3734d24 | 2005-09-13 21:47:11 +0200 | [diff] [blame] | 3045 | port->erp_action.action); |
| 3046 | debug_text_event(adapter->erp_dbf, 4, |
| 3047 | "pf_actenq_drp"); |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 3048 | } else |
Andreas Herrmann | 3734d24 | 2005-09-13 21:47:11 +0200 | [diff] [blame] | 3049 | debug_text_event(adapter->erp_dbf, 4, |
| 3050 | "pf_actenq_drpcp"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3051 | debug_event(adapter->erp_dbf, 4, &port->wwpn, |
| 3052 | sizeof (wwn_t)); |
| 3053 | goto out; |
| 3054 | } |
| 3055 | if (!atomic_test_mask |
| 3056 | (ZFCP_STATUS_COMMON_RUNNING, &adapter->status) || |
| 3057 | atomic_test_mask |
| 3058 | (ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { |
| 3059 | goto out; |
| 3060 | } |
| 3061 | if (!atomic_test_mask |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3062 | (ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) |
| 3063 | need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | /* fall through !!! */ |
| 3065 | |
| 3066 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 3067 | if (atomic_test_mask |
| 3068 | (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) { |
| 3069 | debug_text_event(adapter->erp_dbf, 4, "a_actenq_drp"); |
| 3070 | goto out; |
| 3071 | } |
| 3072 | break; |
| 3073 | |
| 3074 | default: |
| 3075 | debug_text_exception(adapter->erp_dbf, 1, "a_actenq_bug"); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3076 | debug_event(adapter->erp_dbf, 1, &want, sizeof (int)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3077 | ZFCP_LOG_NORMAL("bug: unknown erp action requested " |
| 3078 | "on adapter %s (action=%d)\n", |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3079 | zfcp_get_busid_by_adapter(adapter), want); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3080 | goto out; |
| 3081 | } |
| 3082 | |
| 3083 | /* check whether we need something stronger first */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3084 | if (need) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3085 | debug_text_event(adapter->erp_dbf, 4, "a_actenq_str"); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3086 | debug_event(adapter->erp_dbf, 4, &need, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3087 | sizeof (int)); |
| 3088 | ZFCP_LOG_DEBUG("stronger erp action %d needed before " |
| 3089 | "erp action %d on adapter %s\n", |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3090 | need, want, zfcp_get_busid_by_adapter(adapter)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | } |
| 3092 | |
| 3093 | /* mark adapter to have some error recovery pending */ |
| 3094 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); |
| 3095 | |
| 3096 | /* setup error recovery action */ |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3097 | switch (need) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3098 | |
| 3099 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 3100 | zfcp_unit_get(unit); |
| 3101 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); |
| 3102 | erp_action = &unit->erp_action; |
| 3103 | if (!atomic_test_mask |
| 3104 | (ZFCP_STATUS_COMMON_RUNNING, &unit->status)) |
| 3105 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; |
| 3106 | break; |
| 3107 | |
| 3108 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 3109 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 3110 | zfcp_port_get(port); |
| 3111 | zfcp_erp_action_dismiss_port(port); |
| 3112 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); |
| 3113 | erp_action = &port->erp_action; |
| 3114 | if (!atomic_test_mask |
| 3115 | (ZFCP_STATUS_COMMON_RUNNING, &port->status)) |
| 3116 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; |
| 3117 | break; |
| 3118 | |
| 3119 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 3120 | zfcp_adapter_get(adapter); |
| 3121 | zfcp_erp_action_dismiss_adapter(adapter); |
| 3122 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); |
| 3123 | erp_action = &adapter->erp_action; |
| 3124 | if (!atomic_test_mask |
| 3125 | (ZFCP_STATUS_COMMON_RUNNING, &adapter->status)) |
| 3126 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; |
| 3127 | break; |
| 3128 | } |
| 3129 | |
| 3130 | debug_text_event(adapter->erp_dbf, 4, "a_actenq"); |
| 3131 | |
| 3132 | memset(erp_action, 0, sizeof (struct zfcp_erp_action)); |
| 3133 | erp_action->adapter = adapter; |
| 3134 | erp_action->port = port; |
| 3135 | erp_action->unit = unit; |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3136 | erp_action->action = need; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3137 | erp_action->status = status; |
| 3138 | |
| 3139 | ++adapter->erp_total_count; |
| 3140 | |
| 3141 | /* finally put it into 'ready' queue and kick erp thread */ |
Martin Peschke | 86e8dfc | 2007-11-15 13:57:17 +0100 | [diff] [blame] | 3142 | list_add_tail(&erp_action->list, &adapter->erp_ready_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3143 | up(&adapter->erp_ready_sem); |
Martin Peschke | 348447e | 2008-03-27 14:22:01 +0100 | [diff] [blame] | 3144 | zfcp_rec_dbf_event_thread(1, adapter, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3145 | retval = 0; |
| 3146 | out: |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3147 | zfcp_rec_dbf_event_trigger(id, ref, want, need, (u64)erp_action, |
| 3148 | adapter, port, unit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | return retval; |
| 3150 | } |
| 3151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3152 | static int |
| 3153 | zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) |
| 3154 | { |
| 3155 | int retval = 0; |
| 3156 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 3157 | |
| 3158 | --adapter->erp_total_count; |
| 3159 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { |
| 3160 | --adapter->erp_low_mem_count; |
| 3161 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; |
| 3162 | } |
| 3163 | |
| 3164 | debug_text_event(adapter->erp_dbf, 4, "a_actdeq"); |
| 3165 | debug_event(adapter->erp_dbf, 4, &erp_action->action, sizeof (int)); |
| 3166 | list_del(&erp_action->list); |
Martin Peschke | 6f4f365 | 2008-03-27 14:22:04 +0100 | [diff] [blame^] | 3167 | zfcp_rec_dbf_event_action(144, erp_action); |
| 3168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3169 | switch (erp_action->action) { |
| 3170 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 3171 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, |
| 3172 | &erp_action->unit->status); |
| 3173 | break; |
| 3174 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 3175 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
| 3176 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, |
| 3177 | &erp_action->port->status); |
| 3178 | break; |
| 3179 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
| 3180 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, |
| 3181 | &erp_action->adapter->status); |
| 3182 | break; |
| 3183 | default: |
| 3184 | /* bug */ |
| 3185 | break; |
| 3186 | } |
| 3187 | return retval; |
| 3188 | } |
| 3189 | |
| 3190 | /** |
| 3191 | * zfcp_erp_action_cleanup |
| 3192 | * |
Adrian Bunk | 575c968 | 2006-01-15 02:00:17 +0100 | [diff] [blame] | 3193 | * Register unit with scsi stack if appropriate and fix reference counts. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3194 | * Note: Temporary units are not registered with scsi stack. |
| 3195 | */ |
| 3196 | static void |
| 3197 | zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter, |
| 3198 | struct zfcp_port *port, struct zfcp_unit *unit, |
| 3199 | int result) |
| 3200 | { |
| 3201 | switch (action) { |
| 3202 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
| 3203 | if ((result == ZFCP_ERP_SUCCEEDED) |
| 3204 | && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY, |
| 3205 | &unit->status)) |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 3206 | && !unit->device |
Andreas Herrmann | ad58f7d | 2006-03-10 00:56:16 +0100 | [diff] [blame] | 3207 | && port->rport) { |
| 3208 | atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED, |
| 3209 | &unit->status); |
Christof Schmitt | 5f852be | 2007-05-08 11:16:52 +0200 | [diff] [blame] | 3210 | if (atomic_test_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, |
| 3211 | &unit->status) == 0) |
| 3212 | zfcp_erp_schedule_work(unit); |
Andreas Herrmann | ad58f7d | 2006-03-10 00:56:16 +0100 | [diff] [blame] | 3213 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | zfcp_unit_put(unit); |
| 3215 | break; |
| 3216 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
| 3217 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
Andreas Herrmann | 338151e | 2006-05-22 18:25:56 +0200 | [diff] [blame] | 3218 | if (atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, |
| 3219 | &port->status)) { |
| 3220 | zfcp_port_put(port); |
| 3221 | break; |
| 3222 | } |
| 3223 | |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 3224 | if ((result == ZFCP_ERP_SUCCEEDED) |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 3225 | && !port->rport) { |
| 3226 | struct fc_rport_identifiers ids; |
| 3227 | ids.node_name = port->wwnn; |
| 3228 | ids.port_name = port->wwpn; |
| 3229 | ids.port_id = port->d_id; |
| 3230 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; |
| 3231 | port->rport = |
| 3232 | fc_remote_port_add(adapter->scsi_host, 0, &ids); |
| 3233 | if (!port->rport) |
| 3234 | ZFCP_LOG_NORMAL("failed registration of rport" |
| 3235 | "(adapter %s, wwpn=0x%016Lx)\n", |
| 3236 | zfcp_get_busid_by_port(port), |
| 3237 | port->wwpn); |
Ralph Wuerthner | 75bfc28 | 2006-05-22 18:24:33 +0200 | [diff] [blame] | 3238 | else { |
Christof Schmitt | 5f852be | 2007-05-08 11:16:52 +0200 | [diff] [blame] | 3239 | scsi_target_unblock(&port->rport->dev); |
Ralph Wuerthner | 75bfc28 | 2006-05-22 18:24:33 +0200 | [diff] [blame] | 3240 | port->rport->maxframe_size = port->maxframe_size; |
| 3241 | port->rport->supported_classes = |
| 3242 | port->supported_classes; |
| 3243 | } |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 3244 | } |
Andreas Herrmann | 338151e | 2006-05-22 18:25:56 +0200 | [diff] [blame] | 3245 | if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) { |
| 3246 | fc_remote_port_delete(port->rport); |
| 3247 | port->rport = NULL; |
| 3248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3249 | zfcp_port_put(port); |
| 3250 | break; |
| 3251 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
Andreas Herrmann | 338151e | 2006-05-22 18:25:56 +0200 | [diff] [blame] | 3252 | if (result != ZFCP_ERP_SUCCEEDED) { |
Andreas Herrmann | 338151e | 2006-05-22 18:25:56 +0200 | [diff] [blame] | 3253 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 3254 | if (port->rport && |
| 3255 | !atomic_test_mask(ZFCP_STATUS_PORT_WKA, |
| 3256 | &port->status)) { |
| 3257 | fc_remote_port_delete(port->rport); |
| 3258 | port->rport = NULL; |
| 3259 | } |
| 3260 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3261 | zfcp_adapter_put(adapter); |
| 3262 | break; |
| 3263 | default: |
| 3264 | break; |
| 3265 | } |
| 3266 | } |
| 3267 | |
| 3268 | |
Andreas Herrmann | 8165428 | 2006-09-18 22:30:36 +0200 | [diff] [blame] | 3269 | static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3270 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3271 | struct zfcp_port *port; |
| 3272 | |
| 3273 | debug_text_event(adapter->erp_dbf, 5, "a_actab"); |
| 3274 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) |
| 3275 | zfcp_erp_action_dismiss(&adapter->erp_action); |
| 3276 | else |
| 3277 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 3278 | zfcp_erp_action_dismiss_port(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3279 | } |
| 3280 | |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 3281 | static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3282 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3283 | struct zfcp_unit *unit; |
| 3284 | struct zfcp_adapter *adapter = port->adapter; |
| 3285 | |
| 3286 | debug_text_event(adapter->erp_dbf, 5, "p_actab"); |
| 3287 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); |
| 3288 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) |
| 3289 | zfcp_erp_action_dismiss(&port->erp_action); |
| 3290 | else |
| 3291 | list_for_each_entry(unit, &port->unit_list_head, list) |
| 3292 | zfcp_erp_action_dismiss_unit(unit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3293 | } |
| 3294 | |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 3295 | static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3296 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3297 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 3298 | |
| 3299 | debug_text_event(adapter->erp_dbf, 5, "u_actab"); |
| 3300 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); |
| 3301 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) |
| 3302 | zfcp_erp_action_dismiss(&unit->erp_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3303 | } |
| 3304 | |
Heiko Carstens | 364c855 | 2007-10-12 16:11:35 +0200 | [diff] [blame] | 3305 | static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3306 | { |
| 3307 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 3308 | |
| 3309 | debug_text_event(adapter->erp_dbf, 6, "a_toru"); |
| 3310 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); |
| 3311 | list_move(&erp_action->list, &erp_action->adapter->erp_running_head); |
Martin Peschke | 6f4f365 | 2008-03-27 14:22:04 +0100 | [diff] [blame^] | 3312 | zfcp_rec_dbf_event_action(145, erp_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3313 | } |
| 3314 | |
Heiko Carstens | 364c855 | 2007-10-12 16:11:35 +0200 | [diff] [blame] | 3315 | static void zfcp_erp_action_to_ready(struct zfcp_erp_action *erp_action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3316 | { |
| 3317 | struct zfcp_adapter *adapter = erp_action->adapter; |
| 3318 | |
| 3319 | debug_text_event(adapter->erp_dbf, 6, "a_tore"); |
| 3320 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); |
| 3321 | list_move(&erp_action->list, &erp_action->adapter->erp_ready_head); |
Martin Peschke | 6f4f365 | 2008-03-27 14:22:04 +0100 | [diff] [blame^] | 3322 | zfcp_rec_dbf_event_action(146, erp_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3323 | } |
| 3324 | |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 3325 | void zfcp_erp_port_boxed(struct zfcp_port *port, u8 id, u64 ref) |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3326 | { |
| 3327 | struct zfcp_adapter *adapter = port->adapter; |
| 3328 | unsigned long flags; |
| 3329 | |
| 3330 | debug_text_event(adapter->erp_dbf, 3, "p_access_boxed"); |
| 3331 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t)); |
| 3332 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 3333 | zfcp_erp_modify_port_status(port, id, ref, |
| 3334 | ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET); |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3335 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3336 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3337 | } |
| 3338 | |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 3339 | void zfcp_erp_unit_boxed(struct zfcp_unit *unit, u8 id, u64 ref) |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3340 | { |
| 3341 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 3342 | |
| 3343 | debug_text_event(adapter->erp_dbf, 3, "u_access_boxed"); |
| 3344 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t)); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 3345 | zfcp_erp_modify_unit_status(unit, id, ref, |
| 3346 | ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3347 | zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3348 | } |
| 3349 | |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 3350 | void zfcp_erp_port_access_denied(struct zfcp_port *port, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3351 | { |
| 3352 | struct zfcp_adapter *adapter = port->adapter; |
| 3353 | unsigned long flags; |
| 3354 | |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3355 | debug_text_event(adapter->erp_dbf, 3, "p_access_denied"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3356 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t)); |
| 3357 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 3358 | zfcp_erp_modify_port_status(port, id, ref, |
| 3359 | ZFCP_STATUS_COMMON_ERP_FAILED | |
| 3360 | ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3361 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 3362 | } |
| 3363 | |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 3364 | void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3365 | { |
| 3366 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 3367 | |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3368 | debug_text_event(adapter->erp_dbf, 3, "u_access_denied"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3369 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t)); |
Martin Peschke | 698ec016 | 2008-03-27 14:22:02 +0100 | [diff] [blame] | 3370 | zfcp_erp_modify_unit_status(unit, id, ref, |
| 3371 | ZFCP_STATUS_COMMON_ERP_FAILED | |
| 3372 | ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3373 | } |
| 3374 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3375 | void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, u8 id, |
| 3376 | u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3377 | { |
| 3378 | struct zfcp_port *port; |
| 3379 | unsigned long flags; |
| 3380 | |
Maxim Shchetynin | aef4a98 | 2005-09-13 21:51:16 +0200 | [diff] [blame] | 3381 | if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) |
| 3382 | return; |
| 3383 | |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3384 | debug_text_event(adapter->erp_dbf, 3, "a_access_recover"); |
Andreas Herrmann | 06506d0 | 2006-05-22 18:18:19 +0200 | [diff] [blame] | 3385 | debug_event(adapter->erp_dbf, 3, zfcp_get_busid_by_adapter(adapter), 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3387 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
| 6f71d9b | 2005-04-10 23:04:28 -0500 | [diff] [blame] | 3388 | if (adapter->nameserver_port) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3389 | zfcp_erp_port_access_changed(adapter->nameserver_port, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3390 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 3391 | if (port != adapter->nameserver_port) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3392 | zfcp_erp_port_access_changed(port, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3393 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
| 3394 | } |
| 3395 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3396 | void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3397 | { |
| 3398 | struct zfcp_adapter *adapter = port->adapter; |
| 3399 | struct zfcp_unit *unit; |
| 3400 | |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3401 | debug_text_event(adapter->erp_dbf, 3, "p_access_recover"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3402 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t)); |
| 3403 | |
| 3404 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3405 | &port->status) && |
| 3406 | !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3407 | &port->status)) { |
| 3408 | if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) |
| 3409 | list_for_each_entry(unit, &port->unit_list_head, list) |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3410 | zfcp_erp_unit_access_changed(unit, id, ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3411 | return; |
| 3412 | } |
| 3413 | |
| 3414 | ZFCP_LOG_NORMAL("reopen of port 0x%016Lx on adapter %s " |
| 3415 | "(due to ACT update)\n", |
| 3416 | port->wwpn, zfcp_get_busid_by_adapter(adapter)); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3417 | if (zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | ZFCP_LOG_NORMAL("failed reopen of port" |
| 3419 | "(adapter %s, wwpn=0x%016Lx)\n", |
| 3420 | zfcp_get_busid_by_adapter(adapter), port->wwpn); |
| 3421 | } |
| 3422 | |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3423 | void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id, u64 ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3424 | { |
| 3425 | struct zfcp_adapter *adapter = unit->port->adapter; |
| 3426 | |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3427 | debug_text_event(adapter->erp_dbf, 3, "u_access_recover"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3428 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t)); |
| 3429 | |
Andreas Herrmann | d736a27b | 2005-06-13 13:23:57 +0200 | [diff] [blame] | 3430 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, |
| 3431 | &unit->status) && |
| 3432 | !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED, |
| 3433 | &unit->status)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3434 | return; |
| 3435 | |
| 3436 | ZFCP_LOG_NORMAL("reopen of unit 0x%016Lx on port 0x%016Lx " |
| 3437 | " on adapter %s (due to ACT update)\n", |
| 3438 | unit->fcp_lun, unit->port->wwpn, |
| 3439 | zfcp_get_busid_by_adapter(adapter)); |
Martin Peschke | 9467a9b | 2008-03-27 14:22:03 +0100 | [diff] [blame] | 3440 | if (zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3441 | ZFCP_LOG_NORMAL("failed reopen of unit (adapter %s, " |
| 3442 | "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", |
| 3443 | zfcp_get_busid_by_adapter(adapter), |
| 3444 | unit->port->wwpn, unit->fcp_lun); |
| 3445 | } |
| 3446 | |
| 3447 | #undef ZFCP_LOG_AREA |