drivers/s390/scsi/zfcp_sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * zfcp device driver
   4  *
   5  * sysfs attributes.
   6  *
   7  * Copyright IBM Corp. 2008, 2010
   8  */
   9
  10 #define KMSG_COMPONENT "zfcp"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/slab.h>
  14 #include "zfcp_ext.h"
  15
  16 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
  17 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
  18                                                             _show, _store)
  19 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)             \
  20 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  21                                                    struct device_attribute *at,\
  22                                                    char *buf)                  \
  23 {                                                                              \
  24         struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
  25                                                                                \
  26         return sprintf(buf, _format, _value);                                  \
  27 }                                                                              \
  28 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  29                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  30
  31 #define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value)                  \
  32 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  33                                                    struct device_attribute *at,\
  34                                                    char *buf)                  \
  35 {                                                                              \
  36         return sprintf(buf, _format, _value);                                  \
  37 }                                                                              \
  38 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  39                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  40
  41 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value)                           \
  42 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,         \
  43                                                  struct device_attribute *at,\
  44                                                  char *buf)                  \
  45 {                                                                            \
  46         struct ccw_device *cdev = to_ccwdev(dev);                            \
  47         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);       \
  48         int i;                                                               \
  49                                                                              \
  50         if (!adapter)                                                        \
  51                 return -ENODEV;                                              \
  52                                                                              \
  53         i = sprintf(buf, _format, _value);                                   \
  54         zfcp_ccw_adapter_put(adapter);                                       \
  55         return i;                                                            \
  56 }                                                                            \
  57 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,                                \
  58                      zfcp_sysfs_adapter_##_name##_show, NULL);
  59
  60 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
  61 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
  62                    (unsigned long long) adapter->peer_wwnn);
  63 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
  64                    (unsigned long long) adapter->peer_wwpn);
  65 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
  66 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  67 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  68 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
  69 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
  70                                          ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  71
  72 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
  73                  atomic_read(&port->status));
  74 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
  75                  (atomic_read(&port->status) &
  76                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  77 ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
  78
  79 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
  80                  zfcp_unit_sdev_status(unit));
  81 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
  82                  (zfcp_unit_sdev_status(unit) &
  83                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  84 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
  85                  (zfcp_unit_sdev_status(unit) &
  86                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  87 ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
  88 ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
  89
  90 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
  91                                            struct device_attribute *attr,
  92                                            char *buf)
  93 {
  94         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
  95
  96         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
  97                 return sprintf(buf, "1\n");
  98
  99         return sprintf(buf, "0\n");
 100 }
 101
 102 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
 103                                             struct device_attribute *attr,
 104                                             const char *buf, size_t count)
 105 {
 106         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 107         unsigned long val;
 108
 109         if (kstrtoul(buf, 0, &val) || val != 0)
 110                 return -EINVAL;
 111
 112         zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
 113         zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
 114         zfcp_erp_wait(port->adapter);
 115
 116         return count;
 117 }
 118 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
 119                      zfcp_sysfs_port_failed_show,
 120                      zfcp_sysfs_port_failed_store);
 121
 122 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
 123                                            struct device_attribute *attr,
 124                                            char *buf)
 125 {
 126         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 127         struct scsi_device *sdev;
 128         unsigned int status, failed = 1;
 129
 130         sdev = zfcp_unit_sdev(unit);
 131         if (sdev) {
 132                 status = atomic_read(&sdev_to_zfcp(sdev)->status);
 133                 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 134                 scsi_device_put(sdev);
 135         }
 136
 137         return sprintf(buf, "%d\n", failed);
 138 }
 139
 140 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
 141                                             struct device_attribute *attr,
 142                                             const char *buf, size_t count)
 143 {
 144         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 145         unsigned long val;
 146         struct scsi_device *sdev;
 147
 148         if (kstrtoul(buf, 0, &val) || val != 0)
 149                 return -EINVAL;
 150
 151         sdev = zfcp_unit_sdev(unit);
 152         if (sdev) {
 153                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 154                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 155                                     "syufai2");
 156                 zfcp_erp_wait(unit->port->adapter);
 157         } else
 158                 zfcp_unit_scsi_scan(unit);
 159
 160         return count;
 161 }
 162 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
 163                      zfcp_sysfs_unit_failed_show,
 164                      zfcp_sysfs_unit_failed_store);
 165
 166 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 167                                               struct device_attribute *attr,
 168                                               char *buf)
 169 {
 170         struct ccw_device *cdev = to_ccwdev(dev);
 171         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 172         int i;
 173
 174         if (!adapter)
 175                 return -ENODEV;
 176
 177         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
 178                 i = sprintf(buf, "1\n");
 179         else
 180                 i = sprintf(buf, "0\n");
 181
 182         zfcp_ccw_adapter_put(adapter);
 183         return i;
 184 }
 185
 186 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 187                                                struct device_attribute *attr,
 188                                                const char *buf, size_t count)
 189 {
 190         struct ccw_device *cdev = to_ccwdev(dev);
 191         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 192         unsigned long val;
 193         int retval = 0;
 194
 195         if (!adapter)
 196                 return -ENODEV;
 197
 198         if (kstrtoul(buf, 0, &val) || val != 0) {
 199                 retval = -EINVAL;
 200                 goto out;
 201         }
 202
 203         zfcp_erp_adapter_reset_sync(adapter, "syafai2");
 204 out:
 205         zfcp_ccw_adapter_put(adapter);
 206         return retval ? retval : (ssize_t) count;
 207 }
 208 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
 209                      zfcp_sysfs_adapter_failed_show,
 210                      zfcp_sysfs_adapter_failed_store);
 211
 212 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 213                                             struct device_attribute *attr,
 214                                             const char *buf, size_t count)
 215 {
 216         struct ccw_device *cdev = to_ccwdev(dev);
 217         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 218
 219         if (!adapter)
 220                 return -ENODEV;
 221
 222         /*
 223          * Users wish is our command: immediately schedule and flush a
 224          * worker to conduct a synchronous port scan, that is, neither
 225          * a random delay nor a rate limit is applied here.
 226          */
 227         queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
 228         flush_delayed_work(&adapter->scan_work);
 229         zfcp_ccw_adapter_put(adapter);
 230
 231         return (ssize_t) count;
 232 }
 233 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 234                      zfcp_sysfs_port_rescan_store);
 235
 236 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
 237
 238 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
 239 {
 240         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 241         atomic_set(&port->units, -1);
 242 }
 243
 244 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
 245 {
 246         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 247         return atomic_read(&port->units) == -1;
 248 }
 249
 250 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
 251 {
 252         struct zfcp_adapter *const adapter = port->adapter;
 253         unsigned long flags;
 254         struct scsi_device *sdev;
 255         bool in_use = true;
 256
 257         mutex_lock(&zfcp_sysfs_port_units_mutex);
 258         if (atomic_read(&port->units) > 0)
 259                 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
 260
 261         spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
 262         __shost_for_each_device(sdev, adapter->scsi_host) {
 263                 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
 264
 265                 if (sdev->sdev_state == SDEV_DEL ||
 266                     sdev->sdev_state == SDEV_CANCEL)
 267                         continue;
 268                 if (zsdev->port != port)
 269                         continue;
 270                 /* alive scsi_device under port of interest */
 271                 goto unlock_host_lock;
 272         }
 273
 274         /* port is about to be removed, so no more unit_add or slave_alloc */
 275         zfcp_sysfs_port_set_removing(port);
 276         in_use = false;
 277
 278 unlock_host_lock:
 279         spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
 280 unlock_port_units_mutex:
 281         mutex_unlock(&zfcp_sysfs_port_units_mutex);
 282         return in_use;
 283 }
 284
 285 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 286                                             struct device_attribute *attr,
 287                                             const char *buf, size_t count)
 288 {
 289         struct ccw_device *cdev = to_ccwdev(dev);
 290         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 291         struct zfcp_port *port;
 292         u64 wwpn;
 293         int retval = -EINVAL;
 294
 295         if (!adapter)
 296                 return -ENODEV;
 297
 298         if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
 299                 goto out;
 300
 301         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 302         if (!port)
 303                 goto out;
 304         else
 305                 retval = 0;
 306
 307         if (zfcp_sysfs_port_in_use(port)) {
 308                 retval = -EBUSY;
 309                 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
 310                 goto out;
 311         }
 312
 313         write_lock_irq(&adapter->port_list_lock);
 314         list_del(&port->list);
 315         write_unlock_irq(&adapter->port_list_lock);
 316
 317         put_device(&port->dev);
 318
 319         zfcp_erp_port_shutdown(port, 0, "syprs_1");
 320         device_unregister(&port->dev);
 321  out:
 322         zfcp_ccw_adapter_put(adapter);
 323         return retval ? retval : (ssize_t) count;
 324 }
 325 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 326                      zfcp_sysfs_port_remove_store);
 327
 328 static struct attribute *zfcp_adapter_attrs[] = {
 329         &dev_attr_adapter_failed.attr,
 330         &dev_attr_adapter_in_recovery.attr,
 331         &dev_attr_adapter_port_remove.attr,
 332         &dev_attr_adapter_port_rescan.attr,
 333         &dev_attr_adapter_peer_wwnn.attr,
 334         &dev_attr_adapter_peer_wwpn.attr,
 335         &dev_attr_adapter_peer_d_id.attr,
 336         &dev_attr_adapter_card_version.attr,
 337         &dev_attr_adapter_lic_version.attr,
 338         &dev_attr_adapter_status.attr,
 339         &dev_attr_adapter_hardware_version.attr,
 340         NULL
 341 };
 342
 343 struct attribute_group zfcp_sysfs_adapter_attrs = {
 344         .attrs = zfcp_adapter_attrs,
 345 };
 346
 347 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 348                                          struct device_attribute *attr,
 349                                          const char *buf, size_t count)
 350 {
 351         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 352         u64 fcp_lun;
 353         int retval;
 354
 355         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 356                 return -EINVAL;
 357
 358         retval = zfcp_unit_add(port, fcp_lun);
 359         if (retval)
 360                 return retval;
 361
 362         return count;
 363 }
 364 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 365
 366 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 367                                             struct device_attribute *attr,
 368                                             const char *buf, size_t count)
 369 {
 370         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 371         u64 fcp_lun;
 372
 373         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 374                 return -EINVAL;
 375
 376         if (zfcp_unit_remove(port, fcp_lun))
 377                 return -EINVAL;
 378
 379         return count;
 380 }
 381 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 382
 383 static struct attribute *zfcp_port_attrs[] = {
 384         &dev_attr_unit_add.attr,
 385         &dev_attr_unit_remove.attr,
 386         &dev_attr_port_failed.attr,
 387         &dev_attr_port_in_recovery.attr,
 388         &dev_attr_port_status.attr,
 389         &dev_attr_port_access_denied.attr,
 390         NULL
 391 };
 392 static struct attribute_group zfcp_port_attr_group = {
 393         .attrs = zfcp_port_attrs,
 394 };
 395 const struct attribute_group *zfcp_port_attr_groups[] = {
 396         &zfcp_port_attr_group,
 397         NULL,
 398 };
 399
 400 static struct attribute *zfcp_unit_attrs[] = {
 401         &dev_attr_unit_failed.attr,
 402         &dev_attr_unit_in_recovery.attr,
 403         &dev_attr_unit_status.attr,
 404         &dev_attr_unit_access_denied.attr,
 405         &dev_attr_unit_access_shared.attr,
 406         &dev_attr_unit_access_readonly.attr,
 407         NULL
 408 };
 409 static struct attribute_group zfcp_unit_attr_group = {
 410         .attrs = zfcp_unit_attrs,
 411 };
 412 const struct attribute_group *zfcp_unit_attr_groups[] = {
 413         &zfcp_unit_attr_group,
 414         NULL,
 415 };
 416
 417 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 418 static ssize_t                                                          \
 419 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 420                                        struct device_attribute *attr,   \
 421                                        char *buf) {                     \
 422         struct scsi_device *sdev = to_scsi_device(dev);                 \
 423         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 424         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 425         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;        \
 426         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 427                                                                         \
 428         spin_lock_bh(&lat->lock);                                       \
 429         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 430         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 431         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 432         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 433         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 434         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 435         cc  = lat->_name.counter;                                       \
 436         spin_unlock_bh(&lat->lock);                                     \
 437                                                                         \
 438         do_div(fsum, 1000);                                             \
 439         do_div(fmin, 1000);                                             \
 440         do_div(fmax, 1000);                                             \
 441         do_div(csum, 1000);                                             \
 442         do_div(cmin, 1000);                                             \
 443         do_div(cmax, 1000);                                             \
 444                                                                         \
 445         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 446                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 447 }                                                                       \
 448 static ssize_t                                                          \
 449 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 450                                         struct device_attribute *attr,  \
 451                                         const char *buf, size_t count)  \
 452 {                                                                       \
 453         struct scsi_device *sdev = to_scsi_device(dev);                 \
 454         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 455         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 456         unsigned long flags;                                            \
 457                                                                         \
 458         spin_lock_irqsave(&lat->lock, flags);                           \
 459         lat->_name.fabric.sum = 0;                                      \
 460         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 461         lat->_name.fabric.max = 0;                                      \
 462         lat->_name.channel.sum = 0;                                     \
 463         lat->_name.channel.min = 0xFFFFFFFF;                            \
 464         lat->_name.channel.max = 0;                                     \
 465         lat->_name.counter = 0;                                         \
 466         spin_unlock_irqrestore(&lat->lock, flags);                      \
 467                                                                         \
 468         return (ssize_t) count;                                         \
 469 }                                                                       \
 470 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 471                    zfcp_sysfs_unit_##_name##_latency_show,              \
 472                    zfcp_sysfs_unit_##_name##_latency_store);
 473
 474 ZFCP_DEFINE_LATENCY_ATTR(read);
 475 ZFCP_DEFINE_LATENCY_ATTR(write);
 476 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 477
 478 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 479 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 480                                               struct device_attribute *attr,\
 481                                               char *buf)                 \
 482 {                                                                        \
 483         struct scsi_device *sdev = to_scsi_device(dev);                  \
 484         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);            \
 485                                                                          \
 486         return sprintf(buf, _format, _value);                            \
 487 }                                                                        \
 488 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 489
 490 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 491                       dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
 492 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 493                       (unsigned long long) zfcp_sdev->port->wwpn);
 494
 495 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
 496                                             struct device_attribute *attr,
 497                                             char *buf)
 498 {
 499         struct scsi_device *sdev = to_scsi_device(dev);
 500
 501         return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
 502 }
 503 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 504
 505 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
 506                       (atomic_read(&zfcp_sdev->status) &
 507                        ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
 508
 509 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
 510                                            struct device_attribute *attr,
 511                                            char *buf)
 512 {
 513         struct scsi_device *sdev = to_scsi_device(dev);
 514         unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
 515         unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 516
 517         return sprintf(buf, "%d\n", failed);
 518 }
 519
 520 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
 521                                             struct device_attribute *attr,
 522                                             const char *buf, size_t count)
 523 {
 524         struct scsi_device *sdev = to_scsi_device(dev);
 525         unsigned long val;
 526
 527         if (kstrtoul(buf, 0, &val) || val != 0)
 528                 return -EINVAL;
 529
 530         zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 531         zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 532                             "syufai3");
 533         zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
 534
 535         return count;
 536 }
 537 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
 538                    zfcp_sysfs_scsi_zfcp_failed_show,
 539                    zfcp_sysfs_scsi_zfcp_failed_store);
 540
 541 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
 542                       (atomic_read(&zfcp_sdev->status) &
 543                        ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 544
 545 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
 546                       atomic_read(&zfcp_sdev->status));
 547
 548 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 549         &dev_attr_fcp_lun,
 550         &dev_attr_wwpn,
 551         &dev_attr_hba_id,
 552         &dev_attr_read_latency,
 553         &dev_attr_write_latency,
 554         &dev_attr_cmd_latency,
 555         &dev_attr_zfcp_access_denied,
 556         &dev_attr_zfcp_failed,
 557         &dev_attr_zfcp_in_recovery,
 558         &dev_attr_zfcp_status,
 559         NULL
 560 };
 561
 562 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 563                                             struct device_attribute *attr,
 564                                             char *buf)
 565 {
 566         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 567         struct fsf_qtcb_bottom_port *qtcb_port;
 568         struct zfcp_adapter *adapter;
 569         int retval;
 570
 571         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 572         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 573                 return -EOPNOTSUPP;
 574
 575         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 576         if (!qtcb_port)
 577                 return -ENOMEM;
 578
 579         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 580         if (!retval)
 581                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 582                                  qtcb_port->cb_util, qtcb_port->a_util);
 583         kfree(qtcb_port);
 584         return retval;
 585 }
 586 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 587
 588 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 589                                         struct fsf_statistics_info *stat_inf)
 590 {
 591         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 592         struct fsf_qtcb_bottom_config *qtcb_config;
 593         struct zfcp_adapter *adapter;
 594         int retval;
 595
 596         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 597         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 598                 return -EOPNOTSUPP;
 599
 600         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 601                               GFP_KERNEL);
 602         if (!qtcb_config)
 603                 return -ENOMEM;
 604
 605         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 606         if (!retval)
 607                 *stat_inf = qtcb_config->stat_info;
 608
 609         kfree(qtcb_config);
 610         return retval;
 611 }
 612
 613 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 614 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 615                                                  struct device_attribute *attr,\
 616                                                  char *buf)             \
 617 {                                                                       \
 618         struct fsf_statistics_info stat_info;                           \
 619         int retval;                                                     \
 620                                                                         \
 621         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 622         if (retval)                                                     \
 623                 return retval;                                          \
 624                                                                         \
 625         return sprintf(buf, _format, ## _arg);                          \
 626 }                                                                       \
 627 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 628
 629 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 630                 (unsigned long long) stat_info.input_req,
 631                 (unsigned long long) stat_info.output_req,
 632                 (unsigned long long) stat_info.control_req);
 633
 634 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 635                 (unsigned long long) stat_info.input_mb,
 636                 (unsigned long long) stat_info.output_mb);
 637
 638 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 639                 (unsigned long long) stat_info.seconds_act);
 640
 641 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 642                                               struct device_attribute *attr,
 643                                               char *buf)
 644 {
 645         struct Scsi_Host *scsi_host = class_to_shost(dev);
 646         struct zfcp_qdio *qdio =
 647                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 648         u64 util;
 649
 650         spin_lock_bh(&qdio->stat_lock);
 651         util = qdio->req_q_util;
 652         spin_unlock_bh(&qdio->stat_lock);
 653
 654         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 655                        (unsigned long long)util);
 656 }
 657 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 658
 659 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 660         &dev_attr_utilization,
 661         &dev_attr_requests,
 662         &dev_attr_megabytes,
 663         &dev_attr_seconds_active,
 664         &dev_attr_queue_full,
 665         NULL
 666 };