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                  zfcp_unit_sdev_status(unit));
  72 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
  73                  (zfcp_unit_sdev_status(unit) &
  74                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  75 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
  76                  (zfcp_unit_sdev_status(unit) &
  77                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  78 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
  79                  (zfcp_unit_sdev_status(unit) &
  80                   ZFCP_STATUS_LUN_SHARED) != 0);
  81 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
  82                  (zfcp_unit_sdev_status(unit) &
  83                   ZFCP_STATUS_LUN_READONLY) != 0);
  84
  85 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
  86                                            struct device_attribute *attr,
  87                                            char *buf)
  88 {
  89         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
  90
  91         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
  92                 return sprintf(buf, "1\n");
  93
  94         return sprintf(buf, "0\n");
  95 }
  96
  97 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
  98                                             struct device_attribute *attr,
  99                                             const char *buf, size_t count)
 100 {
 101         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 102         unsigned long val;
 103
 104         if (strict_strtoul(buf, 0, &val) || val != 0)
 105                 return -EINVAL;
 106
 107         zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
 108         zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2",
 109                              NULL);
 110         zfcp_erp_wait(port->adapter);
 111
 112         return count;
 113 }
 114 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
 115                      zfcp_sysfs_port_failed_show,
 116                      zfcp_sysfs_port_failed_store);
 117
 118 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
 119                                            struct device_attribute *attr,
 120                                            char *buf)
 121 {
 122         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 123         struct scsi_device *sdev;
 124         unsigned int status, failed = 1;
 125
 126         sdev = zfcp_unit_sdev(unit);
 127         if (sdev) {
 128                 status = atomic_read(&sdev_to_zfcp(sdev)->status);
 129                 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 130                 scsi_device_put(sdev);
 131         }
 132
 133         return sprintf(buf, "%d\n", failed);
 134 }
 135
 136 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
 137                                             struct device_attribute *attr,
 138                                             const char *buf, size_t count)
 139 {
 140         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 141         unsigned long val;
 142         struct scsi_device *sdev;
 143
 144         if (strict_strtoul(buf, 0, &val) || val != 0)
 145                 return -EINVAL;
 146
 147         sdev = zfcp_unit_sdev(unit);
 148         if (sdev) {
 149                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 150                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 151                                     "syufai2", NULL);
 152                 zfcp_erp_wait(unit->port->adapter);
 153         } else
 154                 zfcp_unit_scsi_scan(unit);
 155
 156         return count;
 157 }
 158 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
 159                      zfcp_sysfs_unit_failed_show,
 160                      zfcp_sysfs_unit_failed_store);
 161
 162 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 163                                               struct device_attribute *attr,
 164                                               char *buf)
 165 {
 166         struct ccw_device *cdev = to_ccwdev(dev);
 167         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 168         int i;
 169
 170         if (!adapter)
 171                 return -ENODEV;
 172
 173         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
 174                 i = sprintf(buf, "1\n");
 175         else
 176                 i = sprintf(buf, "0\n");
 177
 178         zfcp_ccw_adapter_put(adapter);
 179         return i;
 180 }
 181
 182 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 183                                                struct device_attribute *attr,
 184                                                const char *buf, size_t count)
 185 {
 186         struct ccw_device *cdev = to_ccwdev(dev);
 187         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 188         unsigned long val;
 189         int retval = 0;
 190
 191         if (!adapter)
 192                 return -ENODEV;
 193
 194         if (strict_strtoul(buf, 0, &val) || val != 0) {
 195                 retval = -EINVAL;
 196                 goto out;
 197         }
 198
 199         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
 200         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
 201                                 "syafai2", NULL);
 202         zfcp_erp_wait(adapter);
 203 out:
 204         zfcp_ccw_adapter_put(adapter);
 205         return retval ? retval : (ssize_t) count;
 206 }
 207 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
 208                      zfcp_sysfs_adapter_failed_show,
 209                      zfcp_sysfs_adapter_failed_store);
 210
 211 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 212                                             struct device_attribute *attr,
 213                                             const char *buf, size_t count)
 214 {
 215         struct ccw_device *cdev = to_ccwdev(dev);
 216         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 217
 218         if (!adapter)
 219                 return -ENODEV;
 220
 221         /* sync the user-space- with the kernel-invocation of scan_work */
 222         queue_work(adapter->work_queue, &adapter->scan_work);
 223         flush_work(&adapter->scan_work);
 224         zfcp_ccw_adapter_put(adapter);
 225
 226         return (ssize_t) count;
 227 }
 228 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 229                      zfcp_sysfs_port_rescan_store);
 230
 231 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 232                                             struct device_attribute *attr,
 233                                             const char *buf, size_t count)
 234 {
 235         struct ccw_device *cdev = to_ccwdev(dev);
 236         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 237         struct zfcp_port *port;
 238         u64 wwpn;
 239         int retval = -EINVAL;
 240
 241         if (!adapter)
 242                 return -ENODEV;
 243
 244         if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
 245                 goto out;
 246
 247         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 248         if (!port)
 249                 goto out;
 250         else
 251                 retval = 0;
 252
 253         write_lock_irq(&adapter->port_list_lock);
 254         list_del(&port->list);
 255         write_unlock_irq(&adapter->port_list_lock);
 256
 257         put_device(&port->dev);
 258
 259         zfcp_erp_port_shutdown(port, 0, "syprs_1", NULL);
 260         zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs);
 261  out:
 262         zfcp_ccw_adapter_put(adapter);
 263         return retval ? retval : (ssize_t) count;
 264 }
 265 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 266                      zfcp_sysfs_port_remove_store);
 267
 268 static struct attribute *zfcp_adapter_attrs[] = {
 269         &dev_attr_adapter_failed.attr,
 270         &dev_attr_adapter_in_recovery.attr,
 271         &dev_attr_adapter_port_remove.attr,
 272         &dev_attr_adapter_port_rescan.attr,
 273         &dev_attr_adapter_peer_wwnn.attr,
 274         &dev_attr_adapter_peer_wwpn.attr,
 275         &dev_attr_adapter_peer_d_id.attr,
 276         &dev_attr_adapter_card_version.attr,
 277         &dev_attr_adapter_lic_version.attr,
 278         &dev_attr_adapter_status.attr,
 279         &dev_attr_adapter_hardware_version.attr,
 280         NULL
 281 };
 282
 283 struct attribute_group zfcp_sysfs_adapter_attrs = {
 284         .attrs = zfcp_adapter_attrs,
 285 };
 286
 287 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 288                                          struct device_attribute *attr,
 289                                          const char *buf, size_t count)
 290 {
 291         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 292         u64 fcp_lun;
 293
 294         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 295                 return -EINVAL;
 296
 297         if (zfcp_unit_add(port, fcp_lun))
 298                 return -EINVAL;
 299
 300         return count;
 301 }
 302 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 303
 304 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 305                                             struct device_attribute *attr,
 306                                             const char *buf, size_t count)
 307 {
 308         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 309         u64 fcp_lun;
 310
 311         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 312                 return -EINVAL;
 313
 314         if (zfcp_unit_remove(port, fcp_lun))
 315                 return -EINVAL;
 316
 317         return count;
 318 }
 319 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 320
 321 static struct attribute *zfcp_port_attrs[] = {
 322         &dev_attr_unit_add.attr,
 323         &dev_attr_unit_remove.attr,
 324         &dev_attr_port_failed.attr,
 325         &dev_attr_port_in_recovery.attr,
 326         &dev_attr_port_status.attr,
 327         &dev_attr_port_access_denied.attr,
 328         NULL
 329 };
 330
 331 /**
 332  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
 333  */
 334 struct attribute_group zfcp_sysfs_port_attrs = {
 335         .attrs = zfcp_port_attrs,
 336 };
 337
 338 static struct attribute *zfcp_unit_attrs[] = {
 339         &dev_attr_unit_failed.attr,
 340         &dev_attr_unit_in_recovery.attr,
 341         &dev_attr_unit_status.attr,
 342         &dev_attr_unit_access_denied.attr,
 343         &dev_attr_unit_access_shared.attr,
 344         &dev_attr_unit_access_readonly.attr,
 345         NULL
 346 };
 347
 348 struct attribute_group zfcp_sysfs_unit_attrs = {
 349         .attrs = zfcp_unit_attrs,
 350 };
 351
 352 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 353 static ssize_t                                                          \
 354 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 355                                        struct device_attribute *attr,   \
 356                                        char *buf) {                     \
 357         struct scsi_device *sdev = to_scsi_device(dev);                 \
 358         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 359         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 360         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;        \
 361         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 362                                                                         \
 363         spin_lock_bh(&lat->lock);                                       \
 364         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 365         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 366         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 367         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 368         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 369         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 370         cc  = lat->_name.counter;                                       \
 371         spin_unlock_bh(&lat->lock);                                     \
 372                                                                         \
 373         do_div(fsum, 1000);                                             \
 374         do_div(fmin, 1000);                                             \
 375         do_div(fmax, 1000);                                             \
 376         do_div(csum, 1000);                                             \
 377         do_div(cmin, 1000);                                             \
 378         do_div(cmax, 1000);                                             \
 379                                                                         \
 380         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 381                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 382 }                                                                       \
 383 static ssize_t                                                          \
 384 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 385                                         struct device_attribute *attr,  \
 386                                         const char *buf, size_t count)  \
 387 {                                                                       \
 388         struct scsi_device *sdev = to_scsi_device(dev);                 \
 389         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 390         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 391         unsigned long flags;                                            \
 392                                                                         \
 393         spin_lock_irqsave(&lat->lock, flags);                           \
 394         lat->_name.fabric.sum = 0;                                      \
 395         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 396         lat->_name.fabric.max = 0;                                      \
 397         lat->_name.channel.sum = 0;                                     \
 398         lat->_name.channel.min = 0xFFFFFFFF;                            \
 399         lat->_name.channel.max = 0;                                     \
 400         lat->_name.counter = 0;                                         \
 401         spin_unlock_irqrestore(&lat->lock, flags);                      \
 402                                                                         \
 403         return (ssize_t) count;                                         \
 404 }                                                                       \
 405 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 406                    zfcp_sysfs_unit_##_name##_latency_show,              \
 407                    zfcp_sysfs_unit_##_name##_latency_store);
 408
 409 ZFCP_DEFINE_LATENCY_ATTR(read);
 410 ZFCP_DEFINE_LATENCY_ATTR(write);
 411 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 412
 413 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 414 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 415                                               struct device_attribute *attr,\
 416                                               char *buf)                 \
 417 {                                                                        \
 418         struct scsi_device *sdev = to_scsi_device(dev);                  \
 419         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);            \
 420         struct zfcp_port *port = zfcp_sdev->port;                        \
 421                                                                          \
 422         return sprintf(buf, _format, _value);                            \
 423 }                                                                        \
 424 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 425
 426 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 427                       dev_name(&port->adapter->ccw_device->dev));
 428 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 429                       (unsigned long long) port->wwpn);
 430
 431 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
 432                                             struct device_attribute *attr,
 433                                             char *buf)
 434 {
 435         struct scsi_device *sdev = to_scsi_device(dev);
 436
 437         return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
 438 }
 439 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 440
 441 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 442         &dev_attr_fcp_lun,
 443         &dev_attr_wwpn,
 444         &dev_attr_hba_id,
 445         &dev_attr_read_latency,
 446         &dev_attr_write_latency,
 447         &dev_attr_cmd_latency,
 448         NULL
 449 };
 450
 451 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 452                                             struct device_attribute *attr,
 453                                             char *buf)
 454 {
 455         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 456         struct fsf_qtcb_bottom_port *qtcb_port;
 457         struct zfcp_adapter *adapter;
 458         int retval;
 459
 460         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 461         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 462                 return -EOPNOTSUPP;
 463
 464         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 465         if (!qtcb_port)
 466                 return -ENOMEM;
 467
 468         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 469         if (!retval)
 470                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 471                                  qtcb_port->cb_util, qtcb_port->a_util);
 472         kfree(qtcb_port);
 473         return retval;
 474 }
 475 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 476
 477 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 478                                         struct fsf_statistics_info *stat_inf)
 479 {
 480         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 481         struct fsf_qtcb_bottom_config *qtcb_config;
 482         struct zfcp_adapter *adapter;
 483         int retval;
 484
 485         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 486         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 487                 return -EOPNOTSUPP;
 488
 489         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 490                               GFP_KERNEL);
 491         if (!qtcb_config)
 492                 return -ENOMEM;
 493
 494         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 495         if (!retval)
 496                 *stat_inf = qtcb_config->stat_info;
 497
 498         kfree(qtcb_config);
 499         return retval;
 500 }
 501
 502 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 503 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 504                                                  struct device_attribute *attr,\
 505                                                  char *buf)             \
 506 {                                                                       \
 507         struct fsf_statistics_info stat_info;                           \
 508         int retval;                                                     \
 509                                                                         \
 510         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 511         if (retval)                                                     \
 512                 return retval;                                          \
 513                                                                         \
 514         return sprintf(buf, _format, ## _arg);                          \
 515 }                                                                       \
 516 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 517
 518 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 519                 (unsigned long long) stat_info.input_req,
 520                 (unsigned long long) stat_info.output_req,
 521                 (unsigned long long) stat_info.control_req);
 522
 523 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 524                 (unsigned long long) stat_info.input_mb,
 525                 (unsigned long long) stat_info.output_mb);
 526
 527 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 528                 (unsigned long long) stat_info.seconds_act);
 529
 530 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 531                                               struct device_attribute *attr,
 532                                               char *buf)
 533 {
 534         struct Scsi_Host *scsi_host = class_to_shost(dev);
 535         struct zfcp_qdio *qdio =
 536                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 537         u64 util;
 538
 539         spin_lock_bh(&qdio->stat_lock);
 540         util = qdio->req_q_util;
 541         spin_unlock_bh(&qdio->stat_lock);
 542
 543         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 544                        (unsigned long long)util);
 545 }
 546 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 547
 548 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 549         &dev_attr_utilization,
 550         &dev_attr_requests,
 551         &dev_attr_megabytes,
 552         &dev_attr_seconds_active,
 553         &dev_attr_queue_full,
 554         NULL
 555 };