drivers/s390/scsi/zfcp_sysfs.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * sysfs attributes.
   5  *
   6  * Copyright IBM Corp. 2008, 2010
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/slab.h>
  13 #include "zfcp_ext.h"
  14
  15 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
  16 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
  17                                                             _show, _store)
  18 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)             \
  19 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  20                                                    struct device_attribute *at,\
  21                                                    char *buf)                  \
  22 {                                                                              \
  23         struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
  24                                                                                \
  25         return sprintf(buf, _format, _value);                                  \
  26 }                                                                              \
  27 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  28                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  29
  30 #define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value)                  \
  31 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  32                                                    struct device_attribute *at,\
  33                                                    char *buf)                  \
  34 {                                                                              \
  35         return sprintf(buf, _format, _value);                                  \
  36 }                                                                              \
  37 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  38                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  39
  40 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value)                           \
  41 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,         \
  42                                                  struct device_attribute *at,\
  43                                                  char *buf)                  \
  44 {                                                                            \
  45         struct ccw_device *cdev = to_ccwdev(dev);                            \
  46         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);       \
  47         int i;                                                               \
  48                                                                              \
  49         if (!adapter)                                                        \
  50                 return -ENODEV;                                              \
  51                                                                              \
  52         i = sprintf(buf, _format, _value);                                   \
  53         zfcp_ccw_adapter_put(adapter);                                       \
  54         return i;                                                            \
  55 }                                                                            \
  56 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,                                \
  57                      zfcp_sysfs_adapter_##_name##_show, NULL);
  58
  59 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
  60 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
  61                    (unsigned long long) adapter->peer_wwnn);
  62 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
  63                    (unsigned long long) adapter->peer_wwpn);
  64 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
  65 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  66 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  67 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
  68 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
  69                                          ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  70
  71 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
  72                  atomic_read(&port->status));
  73 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
  74                  (atomic_read(&port->status) &
  75                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  76 ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
  77
  78 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
  79                  zfcp_unit_sdev_status(unit));
  80 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
  81                  (zfcp_unit_sdev_status(unit) &
  82                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  83 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
  84                  (zfcp_unit_sdev_status(unit) &
  85                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  86 ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
  87 ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
  88
  89 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
  90                                            struct device_attribute *attr,
  91                                            char *buf)
  92 {
  93         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
  94
  95         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
  96                 return sprintf(buf, "1\n");
  97
  98         return sprintf(buf, "0\n");
  99 }
 100
 101 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
 102                                             struct device_attribute *attr,
 103                                             const char *buf, size_t count)
 104 {
 105         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 106         unsigned long val;
 107
 108         if (kstrtoul(buf, 0, &val) || val != 0)
 109                 return -EINVAL;
 110
 111         zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
 112         zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
 113         zfcp_erp_wait(port->adapter);
 114
 115         return count;
 116 }
 117 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
 118                      zfcp_sysfs_port_failed_show,
 119                      zfcp_sysfs_port_failed_store);
 120
 121 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
 122                                            struct device_attribute *attr,
 123                                            char *buf)
 124 {
 125         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 126         struct scsi_device *sdev;
 127         unsigned int status, failed = 1;
 128
 129         sdev = zfcp_unit_sdev(unit);
 130         if (sdev) {
 131                 status = atomic_read(&sdev_to_zfcp(sdev)->status);
 132                 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 133                 scsi_device_put(sdev);
 134         }
 135
 136         return sprintf(buf, "%d\n", failed);
 137 }
 138
 139 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
 140                                             struct device_attribute *attr,
 141                                             const char *buf, size_t count)
 142 {
 143         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 144         unsigned long val;
 145         struct scsi_device *sdev;
 146
 147         if (kstrtoul(buf, 0, &val) || val != 0)
 148                 return -EINVAL;
 149
 150         sdev = zfcp_unit_sdev(unit);
 151         if (sdev) {
 152                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 153                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 154                                     "syufai2");
 155                 zfcp_erp_wait(unit->port->adapter);
 156         } else
 157                 zfcp_unit_scsi_scan(unit);
 158
 159         return count;
 160 }
 161 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
 162                      zfcp_sysfs_unit_failed_show,
 163                      zfcp_sysfs_unit_failed_store);
 164
 165 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 166                                               struct device_attribute *attr,
 167                                               char *buf)
 168 {
 169         struct ccw_device *cdev = to_ccwdev(dev);
 170         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 171         int i;
 172
 173         if (!adapter)
 174                 return -ENODEV;
 175
 176         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
 177                 i = sprintf(buf, "1\n");
 178         else
 179                 i = sprintf(buf, "0\n");
 180
 181         zfcp_ccw_adapter_put(adapter);
 182         return i;
 183 }
 184
 185 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 186                                                struct device_attribute *attr,
 187                                                const char *buf, size_t count)
 188 {
 189         struct ccw_device *cdev = to_ccwdev(dev);
 190         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 191         unsigned long val;
 192         int retval = 0;
 193
 194         if (!adapter)
 195                 return -ENODEV;
 196
 197         if (kstrtoul(buf, 0, &val) || val != 0) {
 198                 retval = -EINVAL;
 199                 goto out;
 200         }
 201
 202         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
 203         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
 204                                 "syafai2");
 205         zfcp_erp_wait(adapter);
 206 out:
 207         zfcp_ccw_adapter_put(adapter);
 208         return retval ? retval : (ssize_t) count;
 209 }
 210 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
 211                      zfcp_sysfs_adapter_failed_show,
 212                      zfcp_sysfs_adapter_failed_store);
 213
 214 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 215                                             struct device_attribute *attr,
 216                                             const char *buf, size_t count)
 217 {
 218         struct ccw_device *cdev = to_ccwdev(dev);
 219         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 220
 221         if (!adapter)
 222                 return -ENODEV;
 223
 224         /*
 225          * Users wish is our command: immediately schedule and flush a
 226          * worker to conduct a synchronous port scan, that is, neither
 227          * a random delay nor a rate limit is applied here.
 228          */
 229         queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
 230         flush_delayed_work(&adapter->scan_work);
 231         zfcp_ccw_adapter_put(adapter);
 232
 233         return (ssize_t) count;
 234 }
 235 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 236                      zfcp_sysfs_port_rescan_store);
 237
 238 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
 239
 240 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
 241 {
 242         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 243         atomic_set(&port->units, -1);
 244 }
 245
 246 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
 247 {
 248         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 249         return atomic_read(&port->units) == -1;
 250 }
 251
 252 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
 253 {
 254         struct zfcp_adapter *const adapter = port->adapter;
 255         unsigned long flags;
 256         struct scsi_device *sdev;
 257         bool in_use = true;
 258
 259         mutex_lock(&zfcp_sysfs_port_units_mutex);
 260         if (atomic_read(&port->units) > 0)
 261                 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
 262
 263         spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
 264         __shost_for_each_device(sdev, adapter->scsi_host) {
 265                 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
 266
 267                 if (sdev->sdev_state == SDEV_DEL ||
 268                     sdev->sdev_state == SDEV_CANCEL)
 269                         continue;
 270                 if (zsdev->port != port)
 271                         continue;
 272                 /* alive scsi_device under port of interest */
 273                 goto unlock_host_lock;
 274         }
 275
 276         /* port is about to be removed, so no more unit_add or slave_alloc */
 277         zfcp_sysfs_port_set_removing(port);
 278         in_use = false;
 279
 280 unlock_host_lock:
 281         spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
 282 unlock_port_units_mutex:
 283         mutex_unlock(&zfcp_sysfs_port_units_mutex);
 284         return in_use;
 285 }
 286
 287 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 288                                             struct device_attribute *attr,
 289                                             const char *buf, size_t count)
 290 {
 291         struct ccw_device *cdev = to_ccwdev(dev);
 292         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 293         struct zfcp_port *port;
 294         u64 wwpn;
 295         int retval = -EINVAL;
 296
 297         if (!adapter)
 298                 return -ENODEV;
 299
 300         if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
 301                 goto out;
 302
 303         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 304         if (!port)
 305                 goto out;
 306         else
 307                 retval = 0;
 308
 309         if (zfcp_sysfs_port_in_use(port)) {
 310                 retval = -EBUSY;
 311                 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
 312                 goto out;
 313         }
 314
 315         write_lock_irq(&adapter->port_list_lock);
 316         list_del(&port->list);
 317         write_unlock_irq(&adapter->port_list_lock);
 318
 319         put_device(&port->dev);
 320
 321         zfcp_erp_port_shutdown(port, 0, "syprs_1");
 322         device_unregister(&port->dev);
 323  out:
 324         zfcp_ccw_adapter_put(adapter);
 325         return retval ? retval : (ssize_t) count;
 326 }
 327 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 328                      zfcp_sysfs_port_remove_store);
 329
 330 static struct attribute *zfcp_adapter_attrs[] = {
 331         &dev_attr_adapter_failed.attr,
 332         &dev_attr_adapter_in_recovery.attr,
 333         &dev_attr_adapter_port_remove.attr,
 334         &dev_attr_adapter_port_rescan.attr,
 335         &dev_attr_adapter_peer_wwnn.attr,
 336         &dev_attr_adapter_peer_wwpn.attr,
 337         &dev_attr_adapter_peer_d_id.attr,
 338         &dev_attr_adapter_card_version.attr,
 339         &dev_attr_adapter_lic_version.attr,
 340         &dev_attr_adapter_status.attr,
 341         &dev_attr_adapter_hardware_version.attr,
 342         NULL
 343 };
 344
 345 struct attribute_group zfcp_sysfs_adapter_attrs = {
 346         .attrs = zfcp_adapter_attrs,
 347 };
 348
 349 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 350                                          struct device_attribute *attr,
 351                                          const char *buf, size_t count)
 352 {
 353         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 354         u64 fcp_lun;
 355         int retval;
 356
 357         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 358                 return -EINVAL;
 359
 360         retval = zfcp_unit_add(port, fcp_lun);
 361         if (retval)
 362                 return retval;
 363
 364         return count;
 365 }
 366 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 367
 368 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 369                                             struct device_attribute *attr,
 370                                             const char *buf, size_t count)
 371 {
 372         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 373         u64 fcp_lun;
 374
 375         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 376                 return -EINVAL;
 377
 378         if (zfcp_unit_remove(port, fcp_lun))
 379                 return -EINVAL;
 380
 381         return count;
 382 }
 383 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 384
 385 static struct attribute *zfcp_port_attrs[] = {
 386         &dev_attr_unit_add.attr,
 387         &dev_attr_unit_remove.attr,
 388         &dev_attr_port_failed.attr,
 389         &dev_attr_port_in_recovery.attr,
 390         &dev_attr_port_status.attr,
 391         &dev_attr_port_access_denied.attr,
 392         NULL
 393 };
 394 static struct attribute_group zfcp_port_attr_group = {
 395         .attrs = zfcp_port_attrs,
 396 };
 397 const struct attribute_group *zfcp_port_attr_groups[] = {
 398         &zfcp_port_attr_group,
 399         NULL,
 400 };
 401
 402 static struct attribute *zfcp_unit_attrs[] = {
 403         &dev_attr_unit_failed.attr,
 404         &dev_attr_unit_in_recovery.attr,
 405         &dev_attr_unit_status.attr,
 406         &dev_attr_unit_access_denied.attr,
 407         &dev_attr_unit_access_shared.attr,
 408         &dev_attr_unit_access_readonly.attr,
 409         NULL
 410 };
 411 static struct attribute_group zfcp_unit_attr_group = {
 412         .attrs = zfcp_unit_attrs,
 413 };
 414 const struct attribute_group *zfcp_unit_attr_groups[] = {
 415         &zfcp_unit_attr_group,
 416         NULL,
 417 };
 418
 419 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 420 static ssize_t                                                          \
 421 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 422                                        struct device_attribute *attr,   \
 423                                        char *buf) {                     \
 424         struct scsi_device *sdev = to_scsi_device(dev);                 \
 425         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 426         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 427         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;        \
 428         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 429                                                                         \
 430         spin_lock_bh(&lat->lock);                                       \
 431         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 432         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 433         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 434         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 435         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 436         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 437         cc  = lat->_name.counter;                                       \
 438         spin_unlock_bh(&lat->lock);                                     \
 439                                                                         \
 440         do_div(fsum, 1000);                                             \
 441         do_div(fmin, 1000);                                             \
 442         do_div(fmax, 1000);                                             \
 443         do_div(csum, 1000);                                             \
 444         do_div(cmin, 1000);                                             \
 445         do_div(cmax, 1000);                                             \
 446                                                                         \
 447         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 448                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 449 }                                                                       \
 450 static ssize_t                                                          \
 451 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 452                                         struct device_attribute *attr,  \
 453                                         const char *buf, size_t count)  \
 454 {                                                                       \
 455         struct scsi_device *sdev = to_scsi_device(dev);                 \
 456         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 457         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 458         unsigned long flags;                                            \
 459                                                                         \
 460         spin_lock_irqsave(&lat->lock, flags);                           \
 461         lat->_name.fabric.sum = 0;                                      \
 462         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 463         lat->_name.fabric.max = 0;                                      \
 464         lat->_name.channel.sum = 0;                                     \
 465         lat->_name.channel.min = 0xFFFFFFFF;                            \
 466         lat->_name.channel.max = 0;                                     \
 467         lat->_name.counter = 0;                                         \
 468         spin_unlock_irqrestore(&lat->lock, flags);                      \
 469                                                                         \
 470         return (ssize_t) count;                                         \
 471 }                                                                       \
 472 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 473                    zfcp_sysfs_unit_##_name##_latency_show,              \
 474                    zfcp_sysfs_unit_##_name##_latency_store);
 475
 476 ZFCP_DEFINE_LATENCY_ATTR(read);
 477 ZFCP_DEFINE_LATENCY_ATTR(write);
 478 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 479
 480 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 481 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 482                                               struct device_attribute *attr,\
 483                                               char *buf)                 \
 484 {                                                                        \
 485         struct scsi_device *sdev = to_scsi_device(dev);                  \
 486         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);            \
 487                                                                          \
 488         return sprintf(buf, _format, _value);                            \
 489 }                                                                        \
 490 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 491
 492 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 493                       dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
 494 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 495                       (unsigned long long) zfcp_sdev->port->wwpn);
 496
 497 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
 498                                             struct device_attribute *attr,
 499                                             char *buf)
 500 {
 501         struct scsi_device *sdev = to_scsi_device(dev);
 502
 503         return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
 504 }
 505 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 506
 507 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
 508                       (atomic_read(&zfcp_sdev->status) &
 509                        ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
 510
 511 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
 512                                            struct device_attribute *attr,
 513                                            char *buf)
 514 {
 515         struct scsi_device *sdev = to_scsi_device(dev);
 516         unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
 517         unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 518
 519         return sprintf(buf, "%d\n", failed);
 520 }
 521
 522 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
 523                                             struct device_attribute *attr,
 524                                             const char *buf, size_t count)
 525 {
 526         struct scsi_device *sdev = to_scsi_device(dev);
 527         unsigned long val;
 528
 529         if (kstrtoul(buf, 0, &val) || val != 0)
 530                 return -EINVAL;
 531
 532         zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 533         zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 534                             "syufai3");
 535         zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
 536
 537         return count;
 538 }
 539 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
 540                    zfcp_sysfs_scsi_zfcp_failed_show,
 541                    zfcp_sysfs_scsi_zfcp_failed_store);
 542
 543 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
 544                       (atomic_read(&zfcp_sdev->status) &
 545                        ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 546
 547 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
 548                       atomic_read(&zfcp_sdev->status));
 549
 550 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 551         &dev_attr_fcp_lun,
 552         &dev_attr_wwpn,
 553         &dev_attr_hba_id,
 554         &dev_attr_read_latency,
 555         &dev_attr_write_latency,
 556         &dev_attr_cmd_latency,
 557         &dev_attr_zfcp_access_denied,
 558         &dev_attr_zfcp_failed,
 559         &dev_attr_zfcp_in_recovery,
 560         &dev_attr_zfcp_status,
 561         NULL
 562 };
 563
 564 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 565                                             struct device_attribute *attr,
 566                                             char *buf)
 567 {
 568         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 569         struct fsf_qtcb_bottom_port *qtcb_port;
 570         struct zfcp_adapter *adapter;
 571         int retval;
 572
 573         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 574         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 575                 return -EOPNOTSUPP;
 576
 577         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 578         if (!qtcb_port)
 579                 return -ENOMEM;
 580
 581         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 582         if (!retval)
 583                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 584                                  qtcb_port->cb_util, qtcb_port->a_util);
 585         kfree(qtcb_port);
 586         return retval;
 587 }
 588 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 589
 590 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 591                                         struct fsf_statistics_info *stat_inf)
 592 {
 593         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 594         struct fsf_qtcb_bottom_config *qtcb_config;
 595         struct zfcp_adapter *adapter;
 596         int retval;
 597
 598         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 599         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 600                 return -EOPNOTSUPP;
 601
 602         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 603                               GFP_KERNEL);
 604         if (!qtcb_config)
 605                 return -ENOMEM;
 606
 607         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 608         if (!retval)
 609                 *stat_inf = qtcb_config->stat_info;
 610
 611         kfree(qtcb_config);
 612         return retval;
 613 }
 614
 615 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 616 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 617                                                  struct device_attribute *attr,\
 618                                                  char *buf)             \
 619 {                                                                       \
 620         struct fsf_statistics_info stat_info;                           \
 621         int retval;                                                     \
 622                                                                         \
 623         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 624         if (retval)                                                     \
 625                 return retval;                                          \
 626                                                                         \
 627         return sprintf(buf, _format, ## _arg);                          \
 628 }                                                                       \
 629 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 630
 631 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 632                 (unsigned long long) stat_info.input_req,
 633                 (unsigned long long) stat_info.output_req,
 634                 (unsigned long long) stat_info.control_req);
 635
 636 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 637                 (unsigned long long) stat_info.input_mb,
 638                 (unsigned long long) stat_info.output_mb);
 639
 640 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 641                 (unsigned long long) stat_info.seconds_act);
 642
 643 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 644                                               struct device_attribute *attr,
 645                                               char *buf)
 646 {
 647         struct Scsi_Host *scsi_host = class_to_shost(dev);
 648         struct zfcp_qdio *qdio =
 649                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 650         u64 util;
 651
 652         spin_lock_bh(&qdio->stat_lock);
 653         util = qdio->req_q_util;
 654         spin_unlock_bh(&qdio->stat_lock);
 655
 656         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 657                        (unsigned long long)util);
 658 }
 659 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 660
 661 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 662         &dev_attr_utilization,
 663         &dev_attr_requests,
 664         &dev_attr_megabytes,
 665         &dev_attr_seconds_active,
 666         &dev_attr_queue_full,
 667         NULL
 668 };