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         zfcp_erp_wait(port->adapter);
 110
 111         return count;
 112 }
 113 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
 114                      zfcp_sysfs_port_failed_show,
 115                      zfcp_sysfs_port_failed_store);
 116
 117 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
 118                                            struct device_attribute *attr,
 119                                            char *buf)
 120 {
 121         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 122         struct scsi_device *sdev;
 123         unsigned int status, failed = 1;
 124
 125         sdev = zfcp_unit_sdev(unit);
 126         if (sdev) {
 127                 status = atomic_read(&sdev_to_zfcp(sdev)->status);
 128                 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 129                 scsi_device_put(sdev);
 130         }
 131
 132         return sprintf(buf, "%d\n", failed);
 133 }
 134
 135 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
 136                                             struct device_attribute *attr,
 137                                             const char *buf, size_t count)
 138 {
 139         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 140         unsigned long val;
 141         struct scsi_device *sdev;
 142
 143         if (strict_strtoul(buf, 0, &val) || val != 0)
 144                 return -EINVAL;
 145
 146         sdev = zfcp_unit_sdev(unit);
 147         if (sdev) {
 148                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 149                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 150                                     "syufai2");
 151                 zfcp_erp_wait(unit->port->adapter);
 152         } else
 153                 zfcp_unit_scsi_scan(unit);
 154
 155         return count;
 156 }
 157 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
 158                      zfcp_sysfs_unit_failed_show,
 159                      zfcp_sysfs_unit_failed_store);
 160
 161 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 162                                               struct device_attribute *attr,
 163                                               char *buf)
 164 {
 165         struct ccw_device *cdev = to_ccwdev(dev);
 166         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 167         int i;
 168
 169         if (!adapter)
 170                 return -ENODEV;
 171
 172         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
 173                 i = sprintf(buf, "1\n");
 174         else
 175                 i = sprintf(buf, "0\n");
 176
 177         zfcp_ccw_adapter_put(adapter);
 178         return i;
 179 }
 180
 181 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 182                                                struct device_attribute *attr,
 183                                                const char *buf, size_t count)
 184 {
 185         struct ccw_device *cdev = to_ccwdev(dev);
 186         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 187         unsigned long val;
 188         int retval = 0;
 189
 190         if (!adapter)
 191                 return -ENODEV;
 192
 193         if (strict_strtoul(buf, 0, &val) || val != 0) {
 194                 retval = -EINVAL;
 195                 goto out;
 196         }
 197
 198         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
 199         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
 200                                 "syafai2");
 201         zfcp_erp_wait(adapter);
 202 out:
 203         zfcp_ccw_adapter_put(adapter);
 204         return retval ? retval : (ssize_t) count;
 205 }
 206 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
 207                      zfcp_sysfs_adapter_failed_show,
 208                      zfcp_sysfs_adapter_failed_store);
 209
 210 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 211                                             struct device_attribute *attr,
 212                                             const char *buf, size_t count)
 213 {
 214         struct ccw_device *cdev = to_ccwdev(dev);
 215         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 216
 217         if (!adapter)
 218                 return -ENODEV;
 219
 220         /* sync the user-space- with the kernel-invocation of scan_work */
 221         queue_work(adapter->work_queue, &adapter->scan_work);
 222         flush_work(&adapter->scan_work);
 223         zfcp_ccw_adapter_put(adapter);
 224
 225         return (ssize_t) count;
 226 }
 227 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 228                      zfcp_sysfs_port_rescan_store);
 229
 230 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
 231
 232 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 233                                             struct device_attribute *attr,
 234                                             const char *buf, size_t count)
 235 {
 236         struct ccw_device *cdev = to_ccwdev(dev);
 237         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 238         struct zfcp_port *port;
 239         u64 wwpn;
 240         int retval = -EINVAL;
 241
 242         if (!adapter)
 243                 return -ENODEV;
 244
 245         if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
 246                 goto out;
 247
 248         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 249         if (!port)
 250                 goto out;
 251         else
 252                 retval = 0;
 253
 254         mutex_lock(&zfcp_sysfs_port_units_mutex);
 255         if (atomic_read(&port->units) > 0) {
 256                 retval = -EBUSY;
 257                 mutex_unlock(&zfcp_sysfs_port_units_mutex);
 258                 goto out;
 259         }
 260         /* port is about to be removed, so no more unit_add */
 261         atomic_set(&port->units, -1);
 262         mutex_unlock(&zfcp_sysfs_port_units_mutex);
 263
 264         write_lock_irq(&adapter->port_list_lock);
 265         list_del(&port->list);
 266         write_unlock_irq(&adapter->port_list_lock);
 267
 268         put_device(&port->dev);
 269
 270         zfcp_erp_port_shutdown(port, 0, "syprs_1");
 271         zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs);
 272  out:
 273         zfcp_ccw_adapter_put(adapter);
 274         return retval ? retval : (ssize_t) count;
 275 }
 276 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 277                      zfcp_sysfs_port_remove_store);
 278
 279 static struct attribute *zfcp_adapter_attrs[] = {
 280         &dev_attr_adapter_failed.attr,
 281         &dev_attr_adapter_in_recovery.attr,
 282         &dev_attr_adapter_port_remove.attr,
 283         &dev_attr_adapter_port_rescan.attr,
 284         &dev_attr_adapter_peer_wwnn.attr,
 285         &dev_attr_adapter_peer_wwpn.attr,
 286         &dev_attr_adapter_peer_d_id.attr,
 287         &dev_attr_adapter_card_version.attr,
 288         &dev_attr_adapter_lic_version.attr,
 289         &dev_attr_adapter_status.attr,
 290         &dev_attr_adapter_hardware_version.attr,
 291         NULL
 292 };
 293
 294 struct attribute_group zfcp_sysfs_adapter_attrs = {
 295         .attrs = zfcp_adapter_attrs,
 296 };
 297
 298 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 299                                          struct device_attribute *attr,
 300                                          const char *buf, size_t count)
 301 {
 302         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 303         u64 fcp_lun;
 304         int retval;
 305
 306         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 307                 return -EINVAL;
 308
 309         retval = zfcp_unit_add(port, fcp_lun);
 310         if (retval)
 311                 return retval;
 312
 313         return count;
 314 }
 315 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 316
 317 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 318                                             struct device_attribute *attr,
 319                                             const char *buf, size_t count)
 320 {
 321         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 322         u64 fcp_lun;
 323
 324         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 325                 return -EINVAL;
 326
 327         if (zfcp_unit_remove(port, fcp_lun))
 328                 return -EINVAL;
 329
 330         return count;
 331 }
 332 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 333
 334 static struct attribute *zfcp_port_attrs[] = {
 335         &dev_attr_unit_add.attr,
 336         &dev_attr_unit_remove.attr,
 337         &dev_attr_port_failed.attr,
 338         &dev_attr_port_in_recovery.attr,
 339         &dev_attr_port_status.attr,
 340         &dev_attr_port_access_denied.attr,
 341         NULL
 342 };
 343
 344 /**
 345  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
 346  */
 347 struct attribute_group zfcp_sysfs_port_attrs = {
 348         .attrs = zfcp_port_attrs,
 349 };
 350
 351 static struct attribute *zfcp_unit_attrs[] = {
 352         &dev_attr_unit_failed.attr,
 353         &dev_attr_unit_in_recovery.attr,
 354         &dev_attr_unit_status.attr,
 355         &dev_attr_unit_access_denied.attr,
 356         &dev_attr_unit_access_shared.attr,
 357         &dev_attr_unit_access_readonly.attr,
 358         NULL
 359 };
 360
 361 struct attribute_group zfcp_sysfs_unit_attrs = {
 362         .attrs = zfcp_unit_attrs,
 363 };
 364
 365 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 366 static ssize_t                                                          \
 367 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 368                                        struct device_attribute *attr,   \
 369                                        char *buf) {                     \
 370         struct scsi_device *sdev = to_scsi_device(dev);                 \
 371         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 372         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 373         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;        \
 374         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 375                                                                         \
 376         spin_lock_bh(&lat->lock);                                       \
 377         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 378         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 379         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 380         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 381         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 382         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 383         cc  = lat->_name.counter;                                       \
 384         spin_unlock_bh(&lat->lock);                                     \
 385                                                                         \
 386         do_div(fsum, 1000);                                             \
 387         do_div(fmin, 1000);                                             \
 388         do_div(fmax, 1000);                                             \
 389         do_div(csum, 1000);                                             \
 390         do_div(cmin, 1000);                                             \
 391         do_div(cmax, 1000);                                             \
 392                                                                         \
 393         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 394                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 395 }                                                                       \
 396 static ssize_t                                                          \
 397 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 398                                         struct device_attribute *attr,  \
 399                                         const char *buf, size_t count)  \
 400 {                                                                       \
 401         struct scsi_device *sdev = to_scsi_device(dev);                 \
 402         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 403         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 404         unsigned long flags;                                            \
 405                                                                         \
 406         spin_lock_irqsave(&lat->lock, flags);                           \
 407         lat->_name.fabric.sum = 0;                                      \
 408         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 409         lat->_name.fabric.max = 0;                                      \
 410         lat->_name.channel.sum = 0;                                     \
 411         lat->_name.channel.min = 0xFFFFFFFF;                            \
 412         lat->_name.channel.max = 0;                                     \
 413         lat->_name.counter = 0;                                         \
 414         spin_unlock_irqrestore(&lat->lock, flags);                      \
 415                                                                         \
 416         return (ssize_t) count;                                         \
 417 }                                                                       \
 418 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 419                    zfcp_sysfs_unit_##_name##_latency_show,              \
 420                    zfcp_sysfs_unit_##_name##_latency_store);
 421
 422 ZFCP_DEFINE_LATENCY_ATTR(read);
 423 ZFCP_DEFINE_LATENCY_ATTR(write);
 424 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 425
 426 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 427 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 428                                               struct device_attribute *attr,\
 429                                               char *buf)                 \
 430 {                                                                        \
 431         struct scsi_device *sdev = to_scsi_device(dev);                  \
 432         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);            \
 433         struct zfcp_port *port = zfcp_sdev->port;                        \
 434                                                                          \
 435         return sprintf(buf, _format, _value);                            \
 436 }                                                                        \
 437 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 438
 439 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 440                       dev_name(&port->adapter->ccw_device->dev));
 441 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 442                       (unsigned long long) port->wwpn);
 443
 444 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
 445                                             struct device_attribute *attr,
 446                                             char *buf)
 447 {
 448         struct scsi_device *sdev = to_scsi_device(dev);
 449
 450         return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
 451 }
 452 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 453
 454 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 455         &dev_attr_fcp_lun,
 456         &dev_attr_wwpn,
 457         &dev_attr_hba_id,
 458         &dev_attr_read_latency,
 459         &dev_attr_write_latency,
 460         &dev_attr_cmd_latency,
 461         NULL
 462 };
 463
 464 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 465                                             struct device_attribute *attr,
 466                                             char *buf)
 467 {
 468         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 469         struct fsf_qtcb_bottom_port *qtcb_port;
 470         struct zfcp_adapter *adapter;
 471         int retval;
 472
 473         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 474         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 475                 return -EOPNOTSUPP;
 476
 477         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 478         if (!qtcb_port)
 479                 return -ENOMEM;
 480
 481         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 482         if (!retval)
 483                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 484                                  qtcb_port->cb_util, qtcb_port->a_util);
 485         kfree(qtcb_port);
 486         return retval;
 487 }
 488 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 489
 490 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 491                                         struct fsf_statistics_info *stat_inf)
 492 {
 493         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 494         struct fsf_qtcb_bottom_config *qtcb_config;
 495         struct zfcp_adapter *adapter;
 496         int retval;
 497
 498         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 499         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 500                 return -EOPNOTSUPP;
 501
 502         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 503                               GFP_KERNEL);
 504         if (!qtcb_config)
 505                 return -ENOMEM;
 506
 507         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 508         if (!retval)
 509                 *stat_inf = qtcb_config->stat_info;
 510
 511         kfree(qtcb_config);
 512         return retval;
 513 }
 514
 515 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 516 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 517                                                  struct device_attribute *attr,\
 518                                                  char *buf)             \
 519 {                                                                       \
 520         struct fsf_statistics_info stat_info;                           \
 521         int retval;                                                     \
 522                                                                         \
 523         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 524         if (retval)                                                     \
 525                 return retval;                                          \
 526                                                                         \
 527         return sprintf(buf, _format, ## _arg);                          \
 528 }                                                                       \
 529 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 530
 531 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 532                 (unsigned long long) stat_info.input_req,
 533                 (unsigned long long) stat_info.output_req,
 534                 (unsigned long long) stat_info.control_req);
 535
 536 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 537                 (unsigned long long) stat_info.input_mb,
 538                 (unsigned long long) stat_info.output_mb);
 539
 540 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 541                 (unsigned long long) stat_info.seconds_act);
 542
 543 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 544                                               struct device_attribute *attr,
 545                                               char *buf)
 546 {
 547         struct Scsi_Host *scsi_host = class_to_shost(dev);
 548         struct zfcp_qdio *qdio =
 549                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 550         u64 util;
 551
 552         spin_lock_bh(&qdio->stat_lock);
 553         util = qdio->req_q_util;
 554         spin_unlock_bh(&qdio->stat_lock);
 555
 556         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 557                        (unsigned long long)util);
 558 }
 559 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 560
 561 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 562         &dev_attr_utilization,
 563         &dev_attr_requests,
 564         &dev_attr_megabytes,
 565         &dev_attr_seconds_active,
 566         &dev_attr_queue_full,
 567         NULL
 568 };