drivers/s390/scsi/zfcp_sysfs.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * sysfs attributes.
   5  *
   6  * Copyright IBM Corporation 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_A_ATTR(_name, _format, _value)                           \
  31 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,         \
  32                                                  struct device_attribute *at,\
  33                                                  char *buf)                  \
  34 {                                                                            \
  35         struct ccw_device *cdev = to_ccwdev(dev);                            \
  36         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);       \
  37         int i;                                                               \
  38                                                                              \
  39         if (!adapter)                                                        \
  40                 return -ENODEV;                                              \
  41                                                                              \
  42         i = sprintf(buf, _format, _value);                                   \
  43         zfcp_ccw_adapter_put(adapter);                                       \
  44         return i;                                                            \
  45 }                                                                            \
  46 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,                                \
  47                      zfcp_sysfs_adapter_##_name##_show, NULL);
  48
  49 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
  50 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
  51                    (unsigned long long) adapter->peer_wwnn);
  52 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
  53                    (unsigned long long) adapter->peer_wwpn);
  54 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
  55 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  56 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  57 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
  58 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
  59                                          ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  60
  61 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
  62                  atomic_read(&port->status));
  63 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
  64                  (atomic_read(&port->status) &
  65                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  66 ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
  67                  (atomic_read(&port->status) &
  68                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  69
  70 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
  71                  atomic_read(&unit->status));
  72 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
  73                  (atomic_read(&unit->status) &
  74                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  75 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
  76                  (atomic_read(&unit->status) &
  77                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  78 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
  79                  (atomic_read(&unit->status) &
  80                   ZFCP_STATUS_UNIT_SHARED) != 0);
  81 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
  82                  (atomic_read(&unit->status) &
  83                   ZFCP_STATUS_UNIT_READONLY) != 0);
  84
  85 #define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id)     \
  86 static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev,            \
  87                                                 struct device_attribute *attr, \
  88                                                 char *buf)                     \
  89 {                                                                              \
  90         struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
  91                                                                                \
  92         if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED)       \
  93                 return sprintf(buf, "1\n");                                    \
  94         else                                                                   \
  95                 return sprintf(buf, "0\n");                                    \
  96 }                                                                              \
  97 static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev,           \
  98                                                  struct device_attribute *attr,\
  99                                                  const char *buf, size_t count)\
 100 {                                                                              \
 101         struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
 102         unsigned long val;                                                     \
 103         int retval = 0;                                                        \
 104                                                                                \
 105         if (!(_feat && get_device(&_feat->dev)))                               \
 106                 return -EBUSY;                                                 \
 107                                                                                \
 108         if (strict_strtoul(buf, 0, &val) || val != 0) {                        \
 109                 retval = -EINVAL;                                              \
 110                 goto out;                                                      \
 111         }                                                                      \
 112                                                                                \
 113         zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL,                 \
 114                                          ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\
 115         zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED,        \
 116                                   _reopen_id, NULL);                           \
 117         zfcp_erp_wait(_adapter);                                               \
 118 out:                                                                           \
 119         put_device(&_feat->dev);                                               \
 120         return retval ? retval : (ssize_t) count;                              \
 121 }                                                                              \
 122 static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO,                         \
 123                      zfcp_sysfs_##_feat##_failed_show,                         \
 124                      zfcp_sysfs_##_feat##_failed_store);
 125
 126 ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, "sypfai1", "sypfai2");
 127 ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, "syufai1", "syufai2");
 128
 129 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 130                                               struct device_attribute *attr,
 131                                               char *buf)
 132 {
 133         struct ccw_device *cdev = to_ccwdev(dev);
 134         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 135         int i;
 136
 137         if (!adapter)
 138                 return -ENODEV;
 139
 140         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
 141                 i = sprintf(buf, "1\n");
 142         else
 143                 i = sprintf(buf, "0\n");
 144
 145         zfcp_ccw_adapter_put(adapter);
 146         return i;
 147 }
 148
 149 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 150                                                struct device_attribute *attr,
 151                                                const char *buf, size_t count)
 152 {
 153         struct ccw_device *cdev = to_ccwdev(dev);
 154         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 155         unsigned long val;
 156         int retval = 0;
 157
 158         if (!adapter)
 159                 return -ENODEV;
 160
 161         if (strict_strtoul(buf, 0, &val) || val != 0) {
 162                 retval = -EINVAL;
 163                 goto out;
 164         }
 165
 166         zfcp_erp_modify_adapter_status(adapter, "syafai1", NULL,
 167                                        ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
 168         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
 169                                 "syafai2", NULL);
 170         zfcp_erp_wait(adapter);
 171 out:
 172         zfcp_ccw_adapter_put(adapter);
 173         return retval ? retval : (ssize_t) count;
 174 }
 175 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
 176                      zfcp_sysfs_adapter_failed_show,
 177                      zfcp_sysfs_adapter_failed_store);
 178
 179 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 180                                             struct device_attribute *attr,
 181                                             const char *buf, size_t count)
 182 {
 183         struct ccw_device *cdev = to_ccwdev(dev);
 184         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 185
 186         if (!adapter)
 187                 return -ENODEV;
 188
 189         /* sync the user-space- with the kernel-invocation of scan_work */
 190         queue_work(adapter->work_queue, &adapter->scan_work);
 191         flush_work(&adapter->scan_work);
 192         zfcp_ccw_adapter_put(adapter);
 193
 194         return (ssize_t) count;
 195 }
 196 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 197                      zfcp_sysfs_port_rescan_store);
 198
 199 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 200                                             struct device_attribute *attr,
 201                                             const char *buf, size_t count)
 202 {
 203         struct ccw_device *cdev = to_ccwdev(dev);
 204         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 205         struct zfcp_port *port;
 206         u64 wwpn;
 207         int retval = -EINVAL;
 208
 209         if (!adapter)
 210                 return -ENODEV;
 211
 212         if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
 213                 goto out;
 214
 215         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 216         if (!port)
 217                 goto out;
 218         else
 219                 retval = 0;
 220
 221         write_lock_irq(&adapter->port_list_lock);
 222         list_del(&port->list);
 223         write_unlock_irq(&adapter->port_list_lock);
 224
 225         put_device(&port->dev);
 226
 227         zfcp_erp_port_shutdown(port, 0, "syprs_1", NULL);
 228         zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs);
 229  out:
 230         zfcp_ccw_adapter_put(adapter);
 231         return retval ? retval : (ssize_t) count;
 232 }
 233 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 234                      zfcp_sysfs_port_remove_store);
 235
 236 static struct attribute *zfcp_adapter_attrs[] = {
 237         &dev_attr_adapter_failed.attr,
 238         &dev_attr_adapter_in_recovery.attr,
 239         &dev_attr_adapter_port_remove.attr,
 240         &dev_attr_adapter_port_rescan.attr,
 241         &dev_attr_adapter_peer_wwnn.attr,
 242         &dev_attr_adapter_peer_wwpn.attr,
 243         &dev_attr_adapter_peer_d_id.attr,
 244         &dev_attr_adapter_card_version.attr,
 245         &dev_attr_adapter_lic_version.attr,
 246         &dev_attr_adapter_status.attr,
 247         &dev_attr_adapter_hardware_version.attr,
 248         NULL
 249 };
 250
 251 struct attribute_group zfcp_sysfs_adapter_attrs = {
 252         .attrs = zfcp_adapter_attrs,
 253 };
 254
 255 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 256                                          struct device_attribute *attr,
 257                                          const char *buf, size_t count)
 258 {
 259         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 260         struct zfcp_unit *unit;
 261         u64 fcp_lun;
 262         int retval = -EINVAL;
 263
 264         if (!(port && get_device(&port->dev)))
 265                 return -EBUSY;
 266
 267         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 268                 goto out;
 269
 270         unit = zfcp_unit_enqueue(port, fcp_lun);
 271         if (IS_ERR(unit))
 272                 goto out;
 273         else
 274                 retval = 0;
 275
 276         zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
 277         zfcp_erp_wait(unit->port->adapter);
 278         flush_work(&unit->scsi_work);
 279 out:
 280         put_device(&port->dev);
 281         return retval ? retval : (ssize_t) count;
 282 }
 283 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 284
 285 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 286                                             struct device_attribute *attr,
 287                                             const char *buf, size_t count)
 288 {
 289         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 290         struct zfcp_unit *unit;
 291         u64 fcp_lun;
 292         int retval = -EINVAL;
 293
 294         if (!(port && get_device(&port->dev)))
 295                 return -EBUSY;
 296
 297         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 298                 goto out;
 299
 300         unit = zfcp_get_unit_by_lun(port, fcp_lun);
 301         if (!unit)
 302                 goto out;
 303         else
 304                 retval = 0;
 305
 306         /* wait for possible timeout during SCSI probe */
 307         flush_work(&unit->scsi_work);
 308
 309         write_lock_irq(&port->unit_list_lock);
 310         list_del(&unit->list);
 311         write_unlock_irq(&port->unit_list_lock);
 312
 313         put_device(&unit->dev);
 314
 315         zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
 316         zfcp_device_unregister(&unit->dev, &zfcp_sysfs_unit_attrs);
 317 out:
 318         put_device(&port->dev);
 319         return retval ? retval : (ssize_t) count;
 320 }
 321 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 322
 323 static struct attribute *zfcp_port_attrs[] = {
 324         &dev_attr_unit_add.attr,
 325         &dev_attr_unit_remove.attr,
 326         &dev_attr_port_failed.attr,
 327         &dev_attr_port_in_recovery.attr,
 328         &dev_attr_port_status.attr,
 329         &dev_attr_port_access_denied.attr,
 330         NULL
 331 };
 332
 333 /**
 334  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
 335  */
 336 struct attribute_group zfcp_sysfs_port_attrs = {
 337         .attrs = zfcp_port_attrs,
 338 };
 339
 340 static struct attribute *zfcp_unit_attrs[] = {
 341         &dev_attr_unit_failed.attr,
 342         &dev_attr_unit_in_recovery.attr,
 343         &dev_attr_unit_status.attr,
 344         &dev_attr_unit_access_denied.attr,
 345         &dev_attr_unit_access_shared.attr,
 346         &dev_attr_unit_access_readonly.attr,
 347         NULL
 348 };
 349
 350 struct attribute_group zfcp_sysfs_unit_attrs = {
 351         .attrs = zfcp_unit_attrs,
 352 };
 353
 354 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 355 static ssize_t                                                          \
 356 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 357                                        struct device_attribute *attr,   \
 358                                        char *buf) {                     \
 359         struct scsi_device *sdev = to_scsi_device(dev);                 \
 360         struct zfcp_unit *unit = sdev->hostdata;                        \
 361         struct zfcp_latencies *lat = &unit->latencies;                  \
 362         struct zfcp_adapter *adapter = unit->port->adapter;             \
 363         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 364                                                                         \
 365         spin_lock_bh(&lat->lock);                                       \
 366         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 367         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 368         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 369         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 370         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 371         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 372         cc  = lat->_name.counter;                                       \
 373         spin_unlock_bh(&lat->lock);                                     \
 374                                                                         \
 375         do_div(fsum, 1000);                                             \
 376         do_div(fmin, 1000);                                             \
 377         do_div(fmax, 1000);                                             \
 378         do_div(csum, 1000);                                             \
 379         do_div(cmin, 1000);                                             \
 380         do_div(cmax, 1000);                                             \
 381                                                                         \
 382         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 383                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 384 }                                                                       \
 385 static ssize_t                                                          \
 386 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 387                                         struct device_attribute *attr,  \
 388                                         const char *buf, size_t count)  \
 389 {                                                                       \
 390         struct scsi_device *sdev = to_scsi_device(dev);                 \
 391         struct zfcp_unit *unit = sdev->hostdata;                        \
 392         struct zfcp_latencies *lat = &unit->latencies;                  \
 393         unsigned long flags;                                            \
 394                                                                         \
 395         spin_lock_irqsave(&lat->lock, flags);                           \
 396         lat->_name.fabric.sum = 0;                                      \
 397         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 398         lat->_name.fabric.max = 0;                                      \
 399         lat->_name.channel.sum = 0;                                     \
 400         lat->_name.channel.min = 0xFFFFFFFF;                            \
 401         lat->_name.channel.max = 0;                                     \
 402         lat->_name.counter = 0;                                         \
 403         spin_unlock_irqrestore(&lat->lock, flags);                      \
 404                                                                         \
 405         return (ssize_t) count;                                         \
 406 }                                                                       \
 407 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 408                    zfcp_sysfs_unit_##_name##_latency_show,              \
 409                    zfcp_sysfs_unit_##_name##_latency_store);
 410
 411 ZFCP_DEFINE_LATENCY_ATTR(read);
 412 ZFCP_DEFINE_LATENCY_ATTR(write);
 413 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 414
 415 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 416 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 417                                               struct device_attribute *attr,\
 418                                               char *buf)                 \
 419 {                                                                        \
 420         struct scsi_device *sdev  = to_scsi_device(dev);                 \
 421         struct zfcp_unit *unit = sdev->hostdata;                         \
 422                                                                          \
 423         return sprintf(buf, _format, _value);                            \
 424 }                                                                        \
 425 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 426
 427 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 428                       dev_name(&unit->port->adapter->ccw_device->dev));
 429 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 430                       (unsigned long long) unit->port->wwpn);
 431 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
 432                       (unsigned long long) unit->fcp_lun);
 433
 434 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 435         &dev_attr_fcp_lun,
 436         &dev_attr_wwpn,
 437         &dev_attr_hba_id,
 438         &dev_attr_read_latency,
 439         &dev_attr_write_latency,
 440         &dev_attr_cmd_latency,
 441         NULL
 442 };
 443
 444 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 445                                             struct device_attribute *attr,
 446                                             char *buf)
 447 {
 448         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 449         struct fsf_qtcb_bottom_port *qtcb_port;
 450         struct zfcp_adapter *adapter;
 451         int retval;
 452
 453         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 454         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 455                 return -EOPNOTSUPP;
 456
 457         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 458         if (!qtcb_port)
 459                 return -ENOMEM;
 460
 461         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 462         if (!retval)
 463                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 464                                  qtcb_port->cb_util, qtcb_port->a_util);
 465         kfree(qtcb_port);
 466         return retval;
 467 }
 468 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 469
 470 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 471                                         struct fsf_statistics_info *stat_inf)
 472 {
 473         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 474         struct fsf_qtcb_bottom_config *qtcb_config;
 475         struct zfcp_adapter *adapter;
 476         int retval;
 477
 478         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 479         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 480                 return -EOPNOTSUPP;
 481
 482         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 483                               GFP_KERNEL);
 484         if (!qtcb_config)
 485                 return -ENOMEM;
 486
 487         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 488         if (!retval)
 489                 *stat_inf = qtcb_config->stat_info;
 490
 491         kfree(qtcb_config);
 492         return retval;
 493 }
 494
 495 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 496 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 497                                                  struct device_attribute *attr,\
 498                                                  char *buf)             \
 499 {                                                                       \
 500         struct fsf_statistics_info stat_info;                           \
 501         int retval;                                                     \
 502                                                                         \
 503         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 504         if (retval)                                                     \
 505                 return retval;                                          \
 506                                                                         \
 507         return sprintf(buf, _format, ## _arg);                          \
 508 }                                                                       \
 509 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 510
 511 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 512                 (unsigned long long) stat_info.input_req,
 513                 (unsigned long long) stat_info.output_req,
 514                 (unsigned long long) stat_info.control_req);
 515
 516 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 517                 (unsigned long long) stat_info.input_mb,
 518                 (unsigned long long) stat_info.output_mb);
 519
 520 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 521                 (unsigned long long) stat_info.seconds_act);
 522
 523 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 524                                               struct device_attribute *attr,
 525                                               char *buf)
 526 {
 527         struct Scsi_Host *scsi_host = class_to_shost(dev);
 528         struct zfcp_qdio *qdio =
 529                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 530         u64 util;
 531
 532         spin_lock_bh(&qdio->stat_lock);
 533         util = qdio->req_q_util;
 534         spin_unlock_bh(&qdio->stat_lock);
 535
 536         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 537                        (unsigned long long)util);
 538 }
 539 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 540
 541 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 542         &dev_attr_utilization,
 543         &dev_attr_requests,
 544         &dev_attr_megabytes,
 545         &dev_attr_seconds_active,
 546         &dev_attr_queue_full,
 547         NULL
 548 };