git.oblomov.eu Git - linux-2.6/blob - drivers/s390/scsi/zfcp_sysfs.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * sysfs attributes.
   5  *
   6  * Copyright IBM Corporation 2008
   7  */
   8
   9 #define KMSG_COMPONENT "zfcp"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include "zfcp_ext.h"
  13
  14 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
  15 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
  16                                                             _show, _store)
  17 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)             \
  18 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  19                                                    struct device_attribute *at,\
  20                                                    char *buf)                  \
  21 {                                                                              \
  22         struct _feat_def *_feat = dev_get_drvdata(dev);                        \
  23                                                                                \
  24         return sprintf(buf, _format, _value);                                  \
  25 }                                                                              \
  26 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  27                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  28
  29 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, status, "0x%08x\n",
  30                  atomic_read(&adapter->status));
  31 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwnn, "0x%016llx\n",
  32                  (unsigned long long) adapter->peer_wwnn);
  33 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n",
  34                  (unsigned long long) adapter->peer_wwpn);
  35 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_d_id, "0x%06x\n",
  36                  adapter->peer_d_id);
  37 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, card_version, "0x%04x\n",
  38                  adapter->hydra_version);
  39 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, lic_version, "0x%08x\n",
  40                  adapter->fsf_lic_version);
  41 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, hardware_version, "0x%08x\n",
  42                  adapter->hardware_version);
  43 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, in_recovery, "%d\n",
  44                  (atomic_read(&adapter->status) &
  45                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  46
  47 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
  48                  atomic_read(&port->status));
  49 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
  50                  (atomic_read(&port->status) &
  51                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  52 ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
  53                  (atomic_read(&port->status) &
  54                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  55
  56 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
  57                  atomic_read(&unit->status));
  58 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
  59                  (atomic_read(&unit->status) &
  60                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  61 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
  62                  (atomic_read(&unit->status) &
  63                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  64 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
  65                  (atomic_read(&unit->status) &
  66                   ZFCP_STATUS_UNIT_SHARED) != 0);
  67 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
  68                  (atomic_read(&unit->status) &
  69                   ZFCP_STATUS_UNIT_READONLY) != 0);
  70
  71 #define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id)     \
  72 static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev,            \
  73                                                 struct device_attribute *attr, \
  74                                                 char *buf)                     \
  75 {                                                                              \
  76         struct _feat_def *_feat = dev_get_drvdata(dev);                        \
  77                                                                                \
  78         if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED)       \
  79                 return sprintf(buf, "1\n");                                    \
  80         else                                                                   \
  81                 return sprintf(buf, "0\n");                                    \
  82 }                                                                              \
  83 static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev,           \
  84                                                  struct device_attribute *attr,\
  85                                                  const char *buf, size_t count)\
  86 {                                                                              \
  87         struct _feat_def *_feat = dev_get_drvdata(dev);                        \
  88         unsigned long val;                                                     \
  89         int retval = 0;                                                        \
  90                                                                                \
  91         down(&zfcp_data.config_sema);                                          \
  92         if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) {         \
  93                 retval = -EBUSY;                                               \
  94                 goto out;                                                      \
  95         }                                                                      \
  96                                                                                \
  97         if (strict_strtoul(buf, 0, &val) || val != 0) {                        \
  98                 retval = -EINVAL;                                              \
  99                 goto out;                                                      \
 100         }                                                                      \
 101                                                                                \
 102         zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL,                 \
 103                                          ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\
 104         zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED,        \
 105                                   _reopen_id, NULL);                           \
 106         zfcp_erp_wait(_adapter);                                               \
 107 out:                                                                           \
 108         up(&zfcp_data.config_sema);                                            \
 109         return retval ? retval : (ssize_t) count;                              \
 110 }                                                                              \
 111 static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO,                         \
 112                      zfcp_sysfs_##_feat##_failed_show,                         \
 113                      zfcp_sysfs_##_feat##_failed_store);
 114
 115 ZFCP_SYSFS_FAILED(zfcp_adapter, adapter, adapter, "syafai1", "syafai2");
 116 ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, "sypfai1", "sypfai2");
 117 ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, "syufai1", "syufai2");
 118
 119 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 120                                             struct device_attribute *attr,
 121                                             const char *buf, size_t count)
 122 {
 123         struct zfcp_adapter *adapter = dev_get_drvdata(dev);
 124         int ret;
 125
 126         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE)
 127                 return -EBUSY;
 128
 129         ret = zfcp_scan_ports(adapter);
 130         return ret ? ret : (ssize_t) count;
 131 }
 132 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 133                      zfcp_sysfs_port_rescan_store);
 134
 135 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 136                                             struct device_attribute *attr,
 137                                             const char *buf, size_t count)
 138 {
 139         struct zfcp_adapter *adapter = dev_get_drvdata(dev);
 140         struct zfcp_port *port;
 141         u64 wwpn;
 142         int retval = 0;
 143         LIST_HEAD(port_remove_lh);
 144
 145         down(&zfcp_data.config_sema);
 146         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
 147                 retval = -EBUSY;
 148                 goto out;
 149         }
 150
 151         if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn)) {
 152                 retval = -EINVAL;
 153                 goto out;
 154         }
 155
 156         write_lock_irq(&zfcp_data.config_lock);
 157         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 158         if (port && (atomic_read(&port->refcount) == 0)) {
 159                 zfcp_port_get(port);
 160                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
 161                 list_move(&port->list, &port_remove_lh);
 162         } else
 163                 port = NULL;
 164         write_unlock_irq(&zfcp_data.config_lock);
 165
 166         if (!port) {
 167                 retval = -ENXIO;
 168                 goto out;
 169         }
 170
 171         zfcp_erp_port_shutdown(port, 0, "syprs_1", NULL);
 172         zfcp_erp_wait(adapter);
 173         zfcp_port_put(port);
 174         zfcp_port_dequeue(port);
 175  out:
 176         up(&zfcp_data.config_sema);
 177         return retval ? retval : (ssize_t) count;
 178 }
 179 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 180                      zfcp_sysfs_port_remove_store);
 181
 182 static struct attribute *zfcp_adapter_attrs[] = {
 183         &dev_attr_adapter_failed.attr,
 184         &dev_attr_adapter_in_recovery.attr,
 185         &dev_attr_adapter_port_remove.attr,
 186         &dev_attr_adapter_port_rescan.attr,
 187         &dev_attr_adapter_peer_wwnn.attr,
 188         &dev_attr_adapter_peer_wwpn.attr,
 189         &dev_attr_adapter_peer_d_id.attr,
 190         &dev_attr_adapter_card_version.attr,
 191         &dev_attr_adapter_lic_version.attr,
 192         &dev_attr_adapter_status.attr,
 193         &dev_attr_adapter_hardware_version.attr,
 194         NULL
 195 };
 196
 197 struct attribute_group zfcp_sysfs_adapter_attrs = {
 198         .attrs = zfcp_adapter_attrs,
 199 };
 200
 201 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 202                                          struct device_attribute *attr,
 203                                          const char *buf, size_t count)
 204 {
 205         struct zfcp_port *port = dev_get_drvdata(dev);
 206         struct zfcp_unit *unit;
 207         u64 fcp_lun;
 208         int retval = -EINVAL;
 209
 210         down(&zfcp_data.config_sema);
 211         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 212                 retval = -EBUSY;
 213                 goto out;
 214         }
 215
 216         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 217                 goto out;
 218
 219         unit = zfcp_unit_enqueue(port, fcp_lun);
 220         if (IS_ERR(unit))
 221                 goto out;
 222
 223         retval = 0;
 224
 225         zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
 226         zfcp_erp_wait(unit->port->adapter);
 227         zfcp_unit_put(unit);
 228 out:
 229         up(&zfcp_data.config_sema);
 230         return retval ? retval : (ssize_t) count;
 231 }
 232 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 233
 234 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 235                                             struct device_attribute *attr,
 236                                             const char *buf, size_t count)
 237 {
 238         struct zfcp_port *port = dev_get_drvdata(dev);
 239         struct zfcp_unit *unit;
 240         u64 fcp_lun;
 241         int retval = 0;
 242         LIST_HEAD(unit_remove_lh);
 243
 244         down(&zfcp_data.config_sema);
 245         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 246                 retval = -EBUSY;
 247                 goto out;
 248         }
 249
 250         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) {
 251                 retval = -EINVAL;
 252                 goto out;
 253         }
 254
 255         write_lock_irq(&zfcp_data.config_lock);
 256         unit = zfcp_get_unit_by_lun(port, fcp_lun);
 257         if (unit && (atomic_read(&unit->refcount) == 0)) {
 258                 zfcp_unit_get(unit);
 259                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
 260                 list_move(&unit->list, &unit_remove_lh);
 261         } else
 262                 unit = NULL;
 263
 264         write_unlock_irq(&zfcp_data.config_lock);
 265
 266         if (!unit) {
 267                 retval = -ENXIO;
 268                 goto out;
 269         }
 270
 271         zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
 272         zfcp_erp_wait(unit->port->adapter);
 273         zfcp_unit_put(unit);
 274         zfcp_unit_dequeue(unit);
 275 out:
 276         up(&zfcp_data.config_sema);
 277         return retval ? retval : (ssize_t) count;
 278 }
 279 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 280
 281 static struct attribute *zfcp_port_attrs[] = {
 282         &dev_attr_unit_add.attr,
 283         &dev_attr_unit_remove.attr,
 284         &dev_attr_port_failed.attr,
 285         &dev_attr_port_in_recovery.attr,
 286         &dev_attr_port_status.attr,
 287         &dev_attr_port_access_denied.attr,
 288         NULL
 289 };
 290
 291 /**
 292  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
 293  */
 294 struct attribute_group zfcp_sysfs_port_attrs = {
 295         .attrs = zfcp_port_attrs,
 296 };
 297
 298 static struct attribute *zfcp_unit_attrs[] = {
 299         &dev_attr_unit_failed.attr,
 300         &dev_attr_unit_in_recovery.attr,
 301         &dev_attr_unit_status.attr,
 302         &dev_attr_unit_access_denied.attr,
 303         &dev_attr_unit_access_shared.attr,
 304         &dev_attr_unit_access_readonly.attr,
 305         NULL
 306 };
 307
 308 struct attribute_group zfcp_sysfs_unit_attrs = {
 309         .attrs = zfcp_unit_attrs,
 310 };
 311
 312 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 313 static ssize_t                                                          \
 314 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 315                                        struct device_attribute *attr,   \
 316                                        char *buf) {                     \
 317         struct scsi_device *sdev = to_scsi_device(dev);                 \
 318         struct zfcp_unit *unit = sdev->hostdata;                        \
 319         struct zfcp_latencies *lat = &unit->latencies;                  \
 320         struct zfcp_adapter *adapter = unit->port->adapter;             \
 321         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 322                                                                         \
 323         spin_lock_bh(&lat->lock);                                       \
 324         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 325         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 326         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 327         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 328         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 329         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 330         cc  = lat->_name.counter;                                       \
 331         spin_unlock_bh(&lat->lock);                                     \
 332                                                                         \
 333         do_div(fsum, 1000);                                             \
 334         do_div(fmin, 1000);                                             \
 335         do_div(fmax, 1000);                                             \
 336         do_div(csum, 1000);                                             \
 337         do_div(cmin, 1000);                                             \
 338         do_div(cmax, 1000);                                             \
 339                                                                         \
 340         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 341                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 342 }                                                                       \
 343 static ssize_t                                                          \
 344 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 345                                         struct device_attribute *attr,  \
 346                                         const char *buf, size_t count)  \
 347 {                                                                       \
 348         struct scsi_device *sdev = to_scsi_device(dev);                 \
 349         struct zfcp_unit *unit = sdev->hostdata;                        \
 350         struct zfcp_latencies *lat = &unit->latencies;                  \
 351         unsigned long flags;                                            \
 352                                                                         \
 353         spin_lock_irqsave(&lat->lock, flags);                           \
 354         lat->_name.fabric.sum = 0;                                      \
 355         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 356         lat->_name.fabric.max = 0;                                      \
 357         lat->_name.channel.sum = 0;                                     \
 358         lat->_name.channel.min = 0xFFFFFFFF;                            \
 359         lat->_name.channel.max = 0;                                     \
 360         lat->_name.counter = 0;                                         \
 361         spin_unlock_irqrestore(&lat->lock, flags);                      \
 362                                                                         \
 363         return (ssize_t) count;                                         \
 364 }                                                                       \
 365 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 366                    zfcp_sysfs_unit_##_name##_latency_show,              \
 367                    zfcp_sysfs_unit_##_name##_latency_store);
 368
 369 ZFCP_DEFINE_LATENCY_ATTR(read);
 370 ZFCP_DEFINE_LATENCY_ATTR(write);
 371 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 372
 373 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 374 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 375                                               struct device_attribute *attr,\
 376                                               char *buf)                 \
 377 {                                                                        \
 378         struct scsi_device *sdev  = to_scsi_device(dev);                 \
 379         struct zfcp_unit *unit = sdev->hostdata;                         \
 380                                                                          \
 381         return sprintf(buf, _format, _value);                            \
 382 }                                                                        \
 383 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 384
 385 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 386                       dev_name(&unit->port->adapter->ccw_device->dev));
 387 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 388                       (unsigned long long) unit->port->wwpn);
 389 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
 390                       (unsigned long long) unit->fcp_lun);
 391
 392 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 393         &dev_attr_fcp_lun,
 394         &dev_attr_wwpn,
 395         &dev_attr_hba_id,
 396         &dev_attr_read_latency,
 397         &dev_attr_write_latency,
 398         &dev_attr_cmd_latency,
 399         NULL
 400 };
 401
 402 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 403                                             struct device_attribute *attr,
 404                                             char *buf)
 405 {
 406         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 407         struct fsf_qtcb_bottom_port *qtcb_port;
 408         struct zfcp_adapter *adapter;
 409         int retval;
 410
 411         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 412         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 413                 return -EOPNOTSUPP;
 414
 415         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 416         if (!qtcb_port)
 417                 return -ENOMEM;
 418
 419         retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port);
 420         if (!retval)
 421                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 422                                  qtcb_port->cb_util, qtcb_port->a_util);
 423         kfree(qtcb_port);
 424         return retval;
 425 }
 426 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 427
 428 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 429                                         struct fsf_statistics_info *stat_inf)
 430 {
 431         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 432         struct fsf_qtcb_bottom_config *qtcb_config;
 433         struct zfcp_adapter *adapter;
 434         int retval;
 435
 436         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 437         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 438                 return -EOPNOTSUPP;
 439
 440         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 441                               GFP_KERNEL);
 442         if (!qtcb_config)
 443                 return -ENOMEM;
 444
 445         retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config);
 446         if (!retval)
 447                 *stat_inf = qtcb_config->stat_info;
 448
 449         kfree(qtcb_config);
 450         return retval;
 451 }
 452
 453 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 454 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 455                                                  struct device_attribute *attr,\
 456                                                  char *buf)             \
 457 {                                                                       \
 458         struct fsf_statistics_info stat_info;                           \
 459         int retval;                                                     \
 460                                                                         \
 461         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 462         if (retval)                                                     \
 463                 return retval;                                          \
 464                                                                         \
 465         return sprintf(buf, _format, ## _arg);                          \
 466 }                                                                       \
 467 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 468
 469 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 470                 (unsigned long long) stat_info.input_req,
 471                 (unsigned long long) stat_info.output_req,
 472                 (unsigned long long) stat_info.control_req);
 473
 474 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 475                 (unsigned long long) stat_info.input_mb,
 476                 (unsigned long long) stat_info.output_mb);
 477
 478 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 479                 (unsigned long long) stat_info.seconds_act);
 480
 481 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 482                                               struct device_attribute *attr,
 483                                               char *buf)
 484 {
 485         struct Scsi_Host *scsi_host = class_to_shost(dev);
 486         struct zfcp_adapter *adapter =
 487                 (struct zfcp_adapter *) scsi_host->hostdata[0];
 488
 489         return sprintf(buf, "%d %llu\n", atomic_read(&adapter->qdio_outb_full),
 490                        (unsigned long long)adapter->req_q_util);
 491 }
 492 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 493
 494 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 495         &dev_attr_utilization,
 496         &dev_attr_requests,
 497         &dev_attr_megabytes,
 498         &dev_attr_seconds_active,
 499         &dev_attr_queue_full,
 500         NULL
 501 };