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         mutex_lock(&zfcp_data.config_mutex);                                   \
  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         mutex_unlock(&zfcp_data.config_mutex);                                 \
 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_fc_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         mutex_lock(&zfcp_data.config_mutex);
 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         mutex_unlock(&zfcp_data.config_mutex);
 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         mutex_lock(&zfcp_data.config_mutex);
 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         flush_work(&unit->scsi_work);
 228         zfcp_unit_put(unit);
 229 out:
 230         mutex_unlock(&zfcp_data.config_mutex);
 231         return retval ? retval : (ssize_t) count;
 232 }
 233 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 234
 235 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 236                                             struct device_attribute *attr,
 237                                             const char *buf, size_t count)
 238 {
 239         struct zfcp_port *port = dev_get_drvdata(dev);
 240         struct zfcp_unit *unit;
 241         u64 fcp_lun;
 242         int retval = 0;
 243         LIST_HEAD(unit_remove_lh);
 244
 245         mutex_lock(&zfcp_data.config_mutex);
 246         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 247                 retval = -EBUSY;
 248                 goto out;
 249         }
 250
 251         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) {
 252                 retval = -EINVAL;
 253                 goto out;
 254         }
 255
 256         write_lock_irq(&zfcp_data.config_lock);
 257         unit = zfcp_get_unit_by_lun(port, fcp_lun);
 258         if (unit) {
 259                 write_unlock_irq(&zfcp_data.config_lock);
 260                 /* wait for possible timeout during SCSI probe */
 261                 flush_work(&unit->scsi_work);
 262                 write_lock_irq(&zfcp_data.config_lock);
 263
 264                 if (atomic_read(&unit->refcount) == 0) {
 265                         zfcp_unit_get(unit);
 266                         atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE,
 267                                         &unit->status);
 268                         list_move(&unit->list, &unit_remove_lh);
 269                 } else {
 270                         unit = NULL;
 271                 }
 272         }
 273
 274         write_unlock_irq(&zfcp_data.config_lock);
 275
 276         if (!unit) {
 277                 retval = -ENXIO;
 278                 goto out;
 279         }
 280
 281         zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
 282         zfcp_erp_wait(unit->port->adapter);
 283         zfcp_unit_put(unit);
 284         zfcp_unit_dequeue(unit);
 285 out:
 286         mutex_unlock(&zfcp_data.config_mutex);
 287         return retval ? retval : (ssize_t) count;
 288 }
 289 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 290
 291 static struct attribute *zfcp_port_attrs[] = {
 292         &dev_attr_unit_add.attr,
 293         &dev_attr_unit_remove.attr,
 294         &dev_attr_port_failed.attr,
 295         &dev_attr_port_in_recovery.attr,
 296         &dev_attr_port_status.attr,
 297         &dev_attr_port_access_denied.attr,
 298         NULL
 299 };
 300
 301 /**
 302  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
 303  */
 304 struct attribute_group zfcp_sysfs_port_attrs = {
 305         .attrs = zfcp_port_attrs,
 306 };
 307
 308 static struct attribute *zfcp_unit_attrs[] = {
 309         &dev_attr_unit_failed.attr,
 310         &dev_attr_unit_in_recovery.attr,
 311         &dev_attr_unit_status.attr,
 312         &dev_attr_unit_access_denied.attr,
 313         &dev_attr_unit_access_shared.attr,
 314         &dev_attr_unit_access_readonly.attr,
 315         NULL
 316 };
 317
 318 struct attribute_group zfcp_sysfs_unit_attrs = {
 319         .attrs = zfcp_unit_attrs,
 320 };
 321
 322 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 323 static ssize_t                                                          \
 324 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 325                                        struct device_attribute *attr,   \
 326                                        char *buf) {                     \
 327         struct scsi_device *sdev = to_scsi_device(dev);                 \
 328         struct zfcp_unit *unit = sdev->hostdata;                        \
 329         struct zfcp_latencies *lat = &unit->latencies;                  \
 330         struct zfcp_adapter *adapter = unit->port->adapter;             \
 331         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 332                                                                         \
 333         spin_lock_bh(&lat->lock);                                       \
 334         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 335         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 336         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 337         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 338         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 339         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 340         cc  = lat->_name.counter;                                       \
 341         spin_unlock_bh(&lat->lock);                                     \
 342                                                                         \
 343         do_div(fsum, 1000);                                             \
 344         do_div(fmin, 1000);                                             \
 345         do_div(fmax, 1000);                                             \
 346         do_div(csum, 1000);                                             \
 347         do_div(cmin, 1000);                                             \
 348         do_div(cmax, 1000);                                             \
 349                                                                         \
 350         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 351                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 352 }                                                                       \
 353 static ssize_t                                                          \
 354 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 355                                         struct device_attribute *attr,  \
 356                                         const char *buf, size_t count)  \
 357 {                                                                       \
 358         struct scsi_device *sdev = to_scsi_device(dev);                 \
 359         struct zfcp_unit *unit = sdev->hostdata;                        \
 360         struct zfcp_latencies *lat = &unit->latencies;                  \
 361         unsigned long flags;                                            \
 362                                                                         \
 363         spin_lock_irqsave(&lat->lock, flags);                           \
 364         lat->_name.fabric.sum = 0;                                      \
 365         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 366         lat->_name.fabric.max = 0;                                      \
 367         lat->_name.channel.sum = 0;                                     \
 368         lat->_name.channel.min = 0xFFFFFFFF;                            \
 369         lat->_name.channel.max = 0;                                     \
 370         lat->_name.counter = 0;                                         \
 371         spin_unlock_irqrestore(&lat->lock, flags);                      \
 372                                                                         \
 373         return (ssize_t) count;                                         \
 374 }                                                                       \
 375 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 376                    zfcp_sysfs_unit_##_name##_latency_show,              \
 377                    zfcp_sysfs_unit_##_name##_latency_store);
 378
 379 ZFCP_DEFINE_LATENCY_ATTR(read);
 380 ZFCP_DEFINE_LATENCY_ATTR(write);
 381 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 382
 383 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 384 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 385                                               struct device_attribute *attr,\
 386                                               char *buf)                 \
 387 {                                                                        \
 388         struct scsi_device *sdev  = to_scsi_device(dev);                 \
 389         struct zfcp_unit *unit = sdev->hostdata;                         \
 390                                                                          \
 391         return sprintf(buf, _format, _value);                            \
 392 }                                                                        \
 393 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 394
 395 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 396                       dev_name(&unit->port->adapter->ccw_device->dev));
 397 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 398                       (unsigned long long) unit->port->wwpn);
 399 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
 400                       (unsigned long long) unit->fcp_lun);
 401
 402 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 403         &dev_attr_fcp_lun,
 404         &dev_attr_wwpn,
 405         &dev_attr_hba_id,
 406         &dev_attr_read_latency,
 407         &dev_attr_write_latency,
 408         &dev_attr_cmd_latency,
 409         NULL
 410 };
 411
 412 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 413                                             struct device_attribute *attr,
 414                                             char *buf)
 415 {
 416         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 417         struct fsf_qtcb_bottom_port *qtcb_port;
 418         struct zfcp_adapter *adapter;
 419         int retval;
 420
 421         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 422         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 423                 return -EOPNOTSUPP;
 424
 425         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 426         if (!qtcb_port)
 427                 return -ENOMEM;
 428
 429         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 430         if (!retval)
 431                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 432                                  qtcb_port->cb_util, qtcb_port->a_util);
 433         kfree(qtcb_port);
 434         return retval;
 435 }
 436 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 437
 438 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 439                                         struct fsf_statistics_info *stat_inf)
 440 {
 441         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 442         struct fsf_qtcb_bottom_config *qtcb_config;
 443         struct zfcp_adapter *adapter;
 444         int retval;
 445
 446         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 447         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 448                 return -EOPNOTSUPP;
 449
 450         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 451                               GFP_KERNEL);
 452         if (!qtcb_config)
 453                 return -ENOMEM;
 454
 455         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 456         if (!retval)
 457                 *stat_inf = qtcb_config->stat_info;
 458
 459         kfree(qtcb_config);
 460         return retval;
 461 }
 462
 463 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 464 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 465                                                  struct device_attribute *attr,\
 466                                                  char *buf)             \
 467 {                                                                       \
 468         struct fsf_statistics_info stat_info;                           \
 469         int retval;                                                     \
 470                                                                         \
 471         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 472         if (retval)                                                     \
 473                 return retval;                                          \
 474                                                                         \
 475         return sprintf(buf, _format, ## _arg);                          \
 476 }                                                                       \
 477 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 478
 479 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 480                 (unsigned long long) stat_info.input_req,
 481                 (unsigned long long) stat_info.output_req,
 482                 (unsigned long long) stat_info.control_req);
 483
 484 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 485                 (unsigned long long) stat_info.input_mb,
 486                 (unsigned long long) stat_info.output_mb);
 487
 488 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 489                 (unsigned long long) stat_info.seconds_act);
 490
 491 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 492                                               struct device_attribute *attr,
 493                                               char *buf)
 494 {
 495         struct Scsi_Host *scsi_host = class_to_shost(dev);
 496         struct zfcp_qdio *qdio =
 497                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 498         u64 util;
 499
 500         spin_lock_bh(&qdio->stat_lock);
 501         util = qdio->req_q_util;
 502         spin_unlock_bh(&qdio->stat_lock);
 503
 504         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 505                        (unsigned long long)util);
 506 }
 507 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 508
 509 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 510         &dev_attr_utilization,
 511         &dev_attr_requests,
 512         &dev_attr_megabytes,
 513         &dev_attr_seconds_active,
 514         &dev_attr_queue_full,
 515         NULL
 516 };