kernel/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 ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 241                                             struct device_attribute *attr,
 242                                             const char *buf, size_t count)
 243 {
 244         struct ccw_device *cdev = to_ccwdev(dev);
 245         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 246         struct zfcp_port *port;
 247         u64 wwpn;
 248         int retval = -EINVAL;
 249
 250         if (!adapter)
 251                 return -ENODEV;
 252
 253         if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
 254                 goto out;
 255
 256         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 257         if (!port)
 258                 goto out;
 259         else
 260                 retval = 0;
 261
 262         mutex_lock(&zfcp_sysfs_port_units_mutex);
 263         if (atomic_read(&port->units) > 0) {
 264                 retval = -EBUSY;
 265                 mutex_unlock(&zfcp_sysfs_port_units_mutex);
 266                 goto out;
 267         }
 268         /* port is about to be removed, so no more unit_add */
 269         atomic_set(&port->units, -1);
 270         mutex_unlock(&zfcp_sysfs_port_units_mutex);
 271
 272         write_lock_irq(&adapter->port_list_lock);
 273         list_del(&port->list);
 274         write_unlock_irq(&adapter->port_list_lock);
 275
 276         put_device(&port->dev);
 277
 278         zfcp_erp_port_shutdown(port, 0, "syprs_1");
 279         device_unregister(&port->dev);
 280  out:
 281         zfcp_ccw_adapter_put(adapter);
 282         return retval ? retval : (ssize_t) count;
 283 }
 284 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 285                      zfcp_sysfs_port_remove_store);
 286
 287 static struct attribute *zfcp_adapter_attrs[] = {
 288         &dev_attr_adapter_failed.attr,
 289         &dev_attr_adapter_in_recovery.attr,
 290         &dev_attr_adapter_port_remove.attr,
 291         &dev_attr_adapter_port_rescan.attr,
 292         &dev_attr_adapter_peer_wwnn.attr,
 293         &dev_attr_adapter_peer_wwpn.attr,
 294         &dev_attr_adapter_peer_d_id.attr,
 295         &dev_attr_adapter_card_version.attr,
 296         &dev_attr_adapter_lic_version.attr,
 297         &dev_attr_adapter_status.attr,
 298         &dev_attr_adapter_hardware_version.attr,
 299         NULL
 300 };
 301
 302 struct attribute_group zfcp_sysfs_adapter_attrs = {
 303         .attrs = zfcp_adapter_attrs,
 304 };
 305
 306 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 307                                          struct device_attribute *attr,
 308                                          const char *buf, size_t count)
 309 {
 310         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 311         u64 fcp_lun;
 312         int retval;
 313
 314         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 315                 return -EINVAL;
 316
 317         retval = zfcp_unit_add(port, fcp_lun);
 318         if (retval)
 319                 return retval;
 320
 321         return count;
 322 }
 323 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 324
 325 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 326                                             struct device_attribute *attr,
 327                                             const char *buf, size_t count)
 328 {
 329         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 330         u64 fcp_lun;
 331
 332         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 333                 return -EINVAL;
 334
 335         if (zfcp_unit_remove(port, fcp_lun))
 336                 return -EINVAL;
 337
 338         return count;
 339 }
 340 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 341
 342 static struct attribute *zfcp_port_attrs[] = {
 343         &dev_attr_unit_add.attr,
 344         &dev_attr_unit_remove.attr,
 345         &dev_attr_port_failed.attr,
 346         &dev_attr_port_in_recovery.attr,
 347         &dev_attr_port_status.attr,
 348         &dev_attr_port_access_denied.attr,
 349         NULL
 350 };
 351 static struct attribute_group zfcp_port_attr_group = {
 352         .attrs = zfcp_port_attrs,
 353 };
 354 const struct attribute_group *zfcp_port_attr_groups[] = {
 355         &zfcp_port_attr_group,
 356         NULL,
 357 };
 358
 359 static struct attribute *zfcp_unit_attrs[] = {
 360         &dev_attr_unit_failed.attr,
 361         &dev_attr_unit_in_recovery.attr,
 362         &dev_attr_unit_status.attr,
 363         &dev_attr_unit_access_denied.attr,
 364         &dev_attr_unit_access_shared.attr,
 365         &dev_attr_unit_access_readonly.attr,
 366         NULL
 367 };
 368 static struct attribute_group zfcp_unit_attr_group = {
 369         .attrs = zfcp_unit_attrs,
 370 };
 371 const struct attribute_group *zfcp_unit_attr_groups[] = {
 372         &zfcp_unit_attr_group,
 373         NULL,
 374 };
 375
 376 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 377 static ssize_t                                                          \
 378 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 379                                        struct device_attribute *attr,   \
 380                                        char *buf) {                     \
 381         struct scsi_device *sdev = to_scsi_device(dev);                 \
 382         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 383         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 384         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;        \
 385         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 386                                                                         \
 387         spin_lock_bh(&lat->lock);                                       \
 388         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 389         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 390         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 391         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 392         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 393         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 394         cc  = lat->_name.counter;                                       \
 395         spin_unlock_bh(&lat->lock);                                     \
 396                                                                         \
 397         do_div(fsum, 1000);                                             \
 398         do_div(fmin, 1000);                                             \
 399         do_div(fmax, 1000);                                             \
 400         do_div(csum, 1000);                                             \
 401         do_div(cmin, 1000);                                             \
 402         do_div(cmax, 1000);                                             \
 403                                                                         \
 404         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 405                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 406 }                                                                       \
 407 static ssize_t                                                          \
 408 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 409                                         struct device_attribute *attr,  \
 410                                         const char *buf, size_t count)  \
 411 {                                                                       \
 412         struct scsi_device *sdev = to_scsi_device(dev);                 \
 413         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 414         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 415         unsigned long flags;                                            \
 416                                                                         \
 417         spin_lock_irqsave(&lat->lock, flags);                           \
 418         lat->_name.fabric.sum = 0;                                      \
 419         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 420         lat->_name.fabric.max = 0;                                      \
 421         lat->_name.channel.sum = 0;                                     \
 422         lat->_name.channel.min = 0xFFFFFFFF;                            \
 423         lat->_name.channel.max = 0;                                     \
 424         lat->_name.counter = 0;                                         \
 425         spin_unlock_irqrestore(&lat->lock, flags);                      \
 426                                                                         \
 427         return (ssize_t) count;                                         \
 428 }                                                                       \
 429 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 430                    zfcp_sysfs_unit_##_name##_latency_show,              \
 431                    zfcp_sysfs_unit_##_name##_latency_store);
 432
 433 ZFCP_DEFINE_LATENCY_ATTR(read);
 434 ZFCP_DEFINE_LATENCY_ATTR(write);
 435 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 436
 437 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 438 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 439                                               struct device_attribute *attr,\
 440                                               char *buf)                 \
 441 {                                                                        \
 442         struct scsi_device *sdev = to_scsi_device(dev);                  \
 443         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);            \
 444                                                                          \
 445         return sprintf(buf, _format, _value);                            \
 446 }                                                                        \
 447 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 448
 449 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 450                       dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
 451 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 452                       (unsigned long long) zfcp_sdev->port->wwpn);
 453
 454 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
 455                                             struct device_attribute *attr,
 456                                             char *buf)
 457 {
 458         struct scsi_device *sdev = to_scsi_device(dev);
 459
 460         return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
 461 }
 462 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 463
 464 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
 465                       (atomic_read(&zfcp_sdev->status) &
 466                        ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
 467
 468 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
 469                                            struct device_attribute *attr,
 470                                            char *buf)
 471 {
 472         struct scsi_device *sdev = to_scsi_device(dev);
 473         unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
 474         unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 475
 476         return sprintf(buf, "%d\n", failed);
 477 }
 478
 479 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
 480                                             struct device_attribute *attr,
 481                                             const char *buf, size_t count)
 482 {
 483         struct scsi_device *sdev = to_scsi_device(dev);
 484         unsigned long val;
 485
 486         if (kstrtoul(buf, 0, &val) || val != 0)
 487                 return -EINVAL;
 488
 489         zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 490         zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 491                             "syufai3");
 492         zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
 493
 494         return count;
 495 }
 496 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
 497                    zfcp_sysfs_scsi_zfcp_failed_show,
 498                    zfcp_sysfs_scsi_zfcp_failed_store);
 499
 500 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
 501                       (atomic_read(&zfcp_sdev->status) &
 502                        ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 503
 504 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
 505                       atomic_read(&zfcp_sdev->status));
 506
 507 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 508         &dev_attr_fcp_lun,
 509         &dev_attr_wwpn,
 510         &dev_attr_hba_id,
 511         &dev_attr_read_latency,
 512         &dev_attr_write_latency,
 513         &dev_attr_cmd_latency,
 514         &dev_attr_zfcp_access_denied,
 515         &dev_attr_zfcp_failed,
 516         &dev_attr_zfcp_in_recovery,
 517         &dev_attr_zfcp_status,
 518         NULL
 519 };
 520
 521 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 522                                             struct device_attribute *attr,
 523                                             char *buf)
 524 {
 525         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 526         struct fsf_qtcb_bottom_port *qtcb_port;
 527         struct zfcp_adapter *adapter;
 528         int retval;
 529
 530         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 531         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 532                 return -EOPNOTSUPP;
 533
 534         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 535         if (!qtcb_port)
 536                 return -ENOMEM;
 537
 538         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 539         if (!retval)
 540                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 541                                  qtcb_port->cb_util, qtcb_port->a_util);
 542         kfree(qtcb_port);
 543         return retval;
 544 }
 545 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 546
 547 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 548                                         struct fsf_statistics_info *stat_inf)
 549 {
 550         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 551         struct fsf_qtcb_bottom_config *qtcb_config;
 552         struct zfcp_adapter *adapter;
 553         int retval;
 554
 555         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 556         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 557                 return -EOPNOTSUPP;
 558
 559         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 560                               GFP_KERNEL);
 561         if (!qtcb_config)
 562                 return -ENOMEM;
 563
 564         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 565         if (!retval)
 566                 *stat_inf = qtcb_config->stat_info;
 567
 568         kfree(qtcb_config);
 569         return retval;
 570 }
 571
 572 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 573 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 574                                                  struct device_attribute *attr,\
 575                                                  char *buf)             \
 576 {                                                                       \
 577         struct fsf_statistics_info stat_info;                           \
 578         int retval;                                                     \
 579                                                                         \
 580         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 581         if (retval)                                                     \
 582                 return retval;                                          \
 583                                                                         \
 584         return sprintf(buf, _format, ## _arg);                          \
 585 }                                                                       \
 586 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 587
 588 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 589                 (unsigned long long) stat_info.input_req,
 590                 (unsigned long long) stat_info.output_req,
 591                 (unsigned long long) stat_info.control_req);
 592
 593 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 594                 (unsigned long long) stat_info.input_mb,
 595                 (unsigned long long) stat_info.output_mb);
 596
 597 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 598                 (unsigned long long) stat_info.seconds_act);
 599
 600 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 601                                               struct device_attribute *attr,
 602                                               char *buf)
 603 {
 604         struct Scsi_Host *scsi_host = class_to_shost(dev);
 605         struct zfcp_qdio *qdio =
 606                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 607         u64 util;
 608
 609         spin_lock_bh(&qdio->stat_lock);
 610         util = qdio->req_q_util;
 611         spin_unlock_bh(&qdio->stat_lock);
 612
 613         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 614                        (unsigned long long)util);
 615 }
 616 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 617
 618 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 619         &dev_attr_utilization,
 620         &dev_attr_requests,
 621         &dev_attr_megabytes,
 622         &dev_attr_seconds_active,
 623         &dev_attr_queue_full,
 624         NULL
 625 };