drivers/s390/scsi/zfcp_sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * zfcp device driver
   4  *
   5  * sysfs attributes.
   6  *
   7  * Copyright IBM Corp. 2008, 2010
   8  */
   9
  10 #define KMSG_COMPONENT "zfcp"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/slab.h>
  14 #include "zfcp_ext.h"
  15
  16 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
  17 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
  18                                                             _show, _store)
  19 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)             \
  20 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  21                                                    struct device_attribute *at,\
  22                                                    char *buf)                  \
  23 {                                                                              \
  24         struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
  25                                                                                \
  26         return sprintf(buf, _format, _value);                                  \
  27 }                                                                              \
  28 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  29                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  30
  31 #define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value)                  \
  32 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  33                                                    struct device_attribute *at,\
  34                                                    char *buf)                  \
  35 {                                                                              \
  36         return sprintf(buf, _format, _value);                                  \
  37 }                                                                              \
  38 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  39                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  40
  41 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value)                           \
  42 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,         \
  43                                                  struct device_attribute *at,\
  44                                                  char *buf)                  \
  45 {                                                                            \
  46         struct ccw_device *cdev = to_ccwdev(dev);                            \
  47         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);       \
  48         int i;                                                               \
  49                                                                              \
  50         if (!adapter)                                                        \
  51                 return -ENODEV;                                              \
  52                                                                              \
  53         i = sprintf(buf, _format, _value);                                   \
  54         zfcp_ccw_adapter_put(adapter);                                       \
  55         return i;                                                            \
  56 }                                                                            \
  57 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,                                \
  58                      zfcp_sysfs_adapter_##_name##_show, NULL);
  59
  60 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
  61 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
  62                    (unsigned long long) adapter->peer_wwnn);
  63 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
  64                    (unsigned long long) adapter->peer_wwpn);
  65 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
  66 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  67 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  68 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
  69 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
  70                                          ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  71
  72 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
  73                  atomic_read(&port->status));
  74 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
  75                  (atomic_read(&port->status) &
  76                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  77 ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
  78
  79 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
  80                  zfcp_unit_sdev_status(unit));
  81 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
  82                  (zfcp_unit_sdev_status(unit) &
  83                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  84 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
  85                  (zfcp_unit_sdev_status(unit) &
  86                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  87 ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
  88 ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
  89
  90 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
  91                                            struct device_attribute *attr,
  92                                            char *buf)
  93 {
  94         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
  95
  96         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
  97                 return sprintf(buf, "1\n");
  98
  99         return sprintf(buf, "0\n");
 100 }
 101
 102 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
 103                                             struct device_attribute *attr,
 104                                             const char *buf, size_t count)
 105 {
 106         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 107         unsigned long val;
 108
 109         if (kstrtoul(buf, 0, &val) || val != 0)
 110                 return -EINVAL;
 111
 112         zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
 113         zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
 114         zfcp_erp_wait(port->adapter);
 115
 116         return count;
 117 }
 118 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
 119                      zfcp_sysfs_port_failed_show,
 120                      zfcp_sysfs_port_failed_store);
 121
 122 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
 123                                            struct device_attribute *attr,
 124                                            char *buf)
 125 {
 126         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 127         struct scsi_device *sdev;
 128         unsigned int status, failed = 1;
 129
 130         sdev = zfcp_unit_sdev(unit);
 131         if (sdev) {
 132                 status = atomic_read(&sdev_to_zfcp(sdev)->status);
 133                 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 134                 scsi_device_put(sdev);
 135         }
 136
 137         return sprintf(buf, "%d\n", failed);
 138 }
 139
 140 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
 141                                             struct device_attribute *attr,
 142                                             const char *buf, size_t count)
 143 {
 144         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 145         unsigned long val;
 146         struct scsi_device *sdev;
 147
 148         if (kstrtoul(buf, 0, &val) || val != 0)
 149                 return -EINVAL;
 150
 151         sdev = zfcp_unit_sdev(unit);
 152         if (sdev) {
 153                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 154                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 155                                     "syufai2");
 156                 zfcp_erp_wait(unit->port->adapter);
 157         } else
 158                 zfcp_unit_scsi_scan(unit);
 159
 160         return count;
 161 }
 162 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
 163                      zfcp_sysfs_unit_failed_show,
 164                      zfcp_sysfs_unit_failed_store);
 165
 166 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 167                                               struct device_attribute *attr,
 168                                               char *buf)
 169 {
 170         struct ccw_device *cdev = to_ccwdev(dev);
 171         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 172         int i;
 173
 174         if (!adapter)
 175                 return -ENODEV;
 176
 177         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
 178                 i = sprintf(buf, "1\n");
 179         else
 180                 i = sprintf(buf, "0\n");
 181
 182         zfcp_ccw_adapter_put(adapter);
 183         return i;
 184 }
 185
 186 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 187                                                struct device_attribute *attr,
 188                                                const char *buf, size_t count)
 189 {
 190         struct ccw_device *cdev = to_ccwdev(dev);
 191         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 192         unsigned long val;
 193         int retval = 0;
 194
 195         if (!adapter)
 196                 return -ENODEV;
 197
 198         if (kstrtoul(buf, 0, &val) || val != 0) {
 199                 retval = -EINVAL;
 200                 goto out;
 201         }
 202
 203         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
 204         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
 205                                 "syafai2");
 206         zfcp_erp_wait(adapter);
 207 out:
 208         zfcp_ccw_adapter_put(adapter);
 209         return retval ? retval : (ssize_t) count;
 210 }
 211 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
 212                      zfcp_sysfs_adapter_failed_show,
 213                      zfcp_sysfs_adapter_failed_store);
 214
 215 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 216                                             struct device_attribute *attr,
 217                                             const char *buf, size_t count)
 218 {
 219         struct ccw_device *cdev = to_ccwdev(dev);
 220         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 221
 222         if (!adapter)
 223                 return -ENODEV;
 224
 225         /*
 226          * Users wish is our command: immediately schedule and flush a
 227          * worker to conduct a synchronous port scan, that is, neither
 228          * a random delay nor a rate limit is applied here.
 229          */
 230         queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
 231         flush_delayed_work(&adapter->scan_work);
 232         zfcp_ccw_adapter_put(adapter);
 233
 234         return (ssize_t) count;
 235 }
 236 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 237                      zfcp_sysfs_port_rescan_store);
 238
 239 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
 240
 241 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
 242 {
 243         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 244         atomic_set(&port->units, -1);
 245 }
 246
 247 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
 248 {
 249         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 250         return atomic_read(&port->units) == -1;
 251 }
 252
 253 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
 254 {
 255         struct zfcp_adapter *const adapter = port->adapter;
 256         unsigned long flags;
 257         struct scsi_device *sdev;
 258         bool in_use = true;
 259
 260         mutex_lock(&zfcp_sysfs_port_units_mutex);
 261         if (atomic_read(&port->units) > 0)
 262                 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
 263
 264         spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
 265         __shost_for_each_device(sdev, adapter->scsi_host) {
 266                 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
 267
 268                 if (sdev->sdev_state == SDEV_DEL ||
 269                     sdev->sdev_state == SDEV_CANCEL)
 270                         continue;
 271                 if (zsdev->port != port)
 272                         continue;
 273                 /* alive scsi_device under port of interest */
 274                 goto unlock_host_lock;
 275         }
 276
 277         /* port is about to be removed, so no more unit_add or slave_alloc */
 278         zfcp_sysfs_port_set_removing(port);
 279         in_use = false;
 280
 281 unlock_host_lock:
 282         spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
 283 unlock_port_units_mutex:
 284         mutex_unlock(&zfcp_sysfs_port_units_mutex);
 285         return in_use;
 286 }
 287
 288 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 289                                             struct device_attribute *attr,
 290                                             const char *buf, size_t count)
 291 {
 292         struct ccw_device *cdev = to_ccwdev(dev);
 293         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 294         struct zfcp_port *port;
 295         u64 wwpn;
 296         int retval = -EINVAL;
 297
 298         if (!adapter)
 299                 return -ENODEV;
 300
 301         if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
 302                 goto out;
 303
 304         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 305         if (!port)
 306                 goto out;
 307         else
 308                 retval = 0;
 309
 310         if (zfcp_sysfs_port_in_use(port)) {
 311                 retval = -EBUSY;
 312                 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
 313                 goto out;
 314         }
 315
 316         write_lock_irq(&adapter->port_list_lock);
 317         list_del(&port->list);
 318         write_unlock_irq(&adapter->port_list_lock);
 319
 320         put_device(&port->dev);
 321
 322         zfcp_erp_port_shutdown(port, 0, "syprs_1");
 323         device_unregister(&port->dev);
 324  out:
 325         zfcp_ccw_adapter_put(adapter);
 326         return retval ? retval : (ssize_t) count;
 327 }
 328 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 329                      zfcp_sysfs_port_remove_store);
 330
 331 static struct attribute *zfcp_adapter_attrs[] = {
 332         &dev_attr_adapter_failed.attr,
 333         &dev_attr_adapter_in_recovery.attr,
 334         &dev_attr_adapter_port_remove.attr,
 335         &dev_attr_adapter_port_rescan.attr,
 336         &dev_attr_adapter_peer_wwnn.attr,
 337         &dev_attr_adapter_peer_wwpn.attr,
 338         &dev_attr_adapter_peer_d_id.attr,
 339         &dev_attr_adapter_card_version.attr,
 340         &dev_attr_adapter_lic_version.attr,
 341         &dev_attr_adapter_status.attr,
 342         &dev_attr_adapter_hardware_version.attr,
 343         NULL
 344 };
 345
 346 struct attribute_group zfcp_sysfs_adapter_attrs = {
 347         .attrs = zfcp_adapter_attrs,
 348 };
 349
 350 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 351                                          struct device_attribute *attr,
 352                                          const char *buf, size_t count)
 353 {
 354         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 355         u64 fcp_lun;
 356         int retval;
 357
 358         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 359                 return -EINVAL;
 360
 361         retval = zfcp_unit_add(port, fcp_lun);
 362         if (retval)
 363                 return retval;
 364
 365         return count;
 366 }
 367 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 368
 369 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 370                                             struct device_attribute *attr,
 371                                             const char *buf, size_t count)
 372 {
 373         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 374         u64 fcp_lun;
 375
 376         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 377                 return -EINVAL;
 378
 379         if (zfcp_unit_remove(port, fcp_lun))
 380                 return -EINVAL;
 381
 382         return count;
 383 }
 384 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 385
 386 static struct attribute *zfcp_port_attrs[] = {
 387         &dev_attr_unit_add.attr,
 388         &dev_attr_unit_remove.attr,
 389         &dev_attr_port_failed.attr,
 390         &dev_attr_port_in_recovery.attr,
 391         &dev_attr_port_status.attr,
 392         &dev_attr_port_access_denied.attr,
 393         NULL
 394 };
 395 static struct attribute_group zfcp_port_attr_group = {
 396         .attrs = zfcp_port_attrs,
 397 };
 398 const struct attribute_group *zfcp_port_attr_groups[] = {
 399         &zfcp_port_attr_group,
 400         NULL,
 401 };
 402
 403 static struct attribute *zfcp_unit_attrs[] = {
 404         &dev_attr_unit_failed.attr,
 405         &dev_attr_unit_in_recovery.attr,
 406         &dev_attr_unit_status.attr,
 407         &dev_attr_unit_access_denied.attr,
 408         &dev_attr_unit_access_shared.attr,
 409         &dev_attr_unit_access_readonly.attr,
 410         NULL
 411 };
 412 static struct attribute_group zfcp_unit_attr_group = {
 413         .attrs = zfcp_unit_attrs,
 414 };
 415 const struct attribute_group *zfcp_unit_attr_groups[] = {
 416         &zfcp_unit_attr_group,
 417         NULL,
 418 };
 419
 420 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 421 static ssize_t                                                          \
 422 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 423                                        struct device_attribute *attr,   \
 424                                        char *buf) {                     \
 425         struct scsi_device *sdev = to_scsi_device(dev);                 \
 426         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 427         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 428         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;        \
 429         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 430                                                                         \
 431         spin_lock_bh(&lat->lock);                                       \
 432         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 433         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 434         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 435         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 436         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 437         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 438         cc  = lat->_name.counter;                                       \
 439         spin_unlock_bh(&lat->lock);                                     \
 440                                                                         \
 441         do_div(fsum, 1000);                                             \
 442         do_div(fmin, 1000);                                             \
 443         do_div(fmax, 1000);                                             \
 444         do_div(csum, 1000);                                             \
 445         do_div(cmin, 1000);                                             \
 446         do_div(cmax, 1000);                                             \
 447                                                                         \
 448         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 449                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 450 }                                                                       \
 451 static ssize_t                                                          \
 452 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 453                                         struct device_attribute *attr,  \
 454                                         const char *buf, size_t count)  \
 455 {                                                                       \
 456         struct scsi_device *sdev = to_scsi_device(dev);                 \
 457         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 458         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 459         unsigned long flags;                                            \
 460                                                                         \
 461         spin_lock_irqsave(&lat->lock, flags);                           \
 462         lat->_name.fabric.sum = 0;                                      \
 463         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 464         lat->_name.fabric.max = 0;                                      \
 465         lat->_name.channel.sum = 0;                                     \
 466         lat->_name.channel.min = 0xFFFFFFFF;                            \
 467         lat->_name.channel.max = 0;                                     \
 468         lat->_name.counter = 0;                                         \
 469         spin_unlock_irqrestore(&lat->lock, flags);                      \
 470                                                                         \
 471         return (ssize_t) count;                                         \
 472 }                                                                       \
 473 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 474                    zfcp_sysfs_unit_##_name##_latency_show,              \
 475                    zfcp_sysfs_unit_##_name##_latency_store);
 476
 477 ZFCP_DEFINE_LATENCY_ATTR(read);
 478 ZFCP_DEFINE_LATENCY_ATTR(write);
 479 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 480
 481 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 482 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 483                                               struct device_attribute *attr,\
 484                                               char *buf)                 \
 485 {                                                                        \
 486         struct scsi_device *sdev = to_scsi_device(dev);                  \
 487         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);            \
 488                                                                          \
 489         return sprintf(buf, _format, _value);                            \
 490 }                                                                        \
 491 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 492
 493 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 494                       dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
 495 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 496                       (unsigned long long) zfcp_sdev->port->wwpn);
 497
 498 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
 499                                             struct device_attribute *attr,
 500                                             char *buf)
 501 {
 502         struct scsi_device *sdev = to_scsi_device(dev);
 503
 504         return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
 505 }
 506 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 507
 508 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
 509                       (atomic_read(&zfcp_sdev->status) &
 510                        ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
 511
 512 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
 513                                            struct device_attribute *attr,
 514                                            char *buf)
 515 {
 516         struct scsi_device *sdev = to_scsi_device(dev);
 517         unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
 518         unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 519
 520         return sprintf(buf, "%d\n", failed);
 521 }
 522
 523 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
 524                                             struct device_attribute *attr,
 525                                             const char *buf, size_t count)
 526 {
 527         struct scsi_device *sdev = to_scsi_device(dev);
 528         unsigned long val;
 529
 530         if (kstrtoul(buf, 0, &val) || val != 0)
 531                 return -EINVAL;
 532
 533         zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 534         zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 535                             "syufai3");
 536         zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
 537
 538         return count;
 539 }
 540 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
 541                    zfcp_sysfs_scsi_zfcp_failed_show,
 542                    zfcp_sysfs_scsi_zfcp_failed_store);
 543
 544 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
 545                       (atomic_read(&zfcp_sdev->status) &
 546                        ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 547
 548 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
 549                       atomic_read(&zfcp_sdev->status));
 550
 551 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 552         &dev_attr_fcp_lun,
 553         &dev_attr_wwpn,
 554         &dev_attr_hba_id,
 555         &dev_attr_read_latency,
 556         &dev_attr_write_latency,
 557         &dev_attr_cmd_latency,
 558         &dev_attr_zfcp_access_denied,
 559         &dev_attr_zfcp_failed,
 560         &dev_attr_zfcp_in_recovery,
 561         &dev_attr_zfcp_status,
 562         NULL
 563 };
 564
 565 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 566                                             struct device_attribute *attr,
 567                                             char *buf)
 568 {
 569         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 570         struct fsf_qtcb_bottom_port *qtcb_port;
 571         struct zfcp_adapter *adapter;
 572         int retval;
 573
 574         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 575         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 576                 return -EOPNOTSUPP;
 577
 578         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 579         if (!qtcb_port)
 580                 return -ENOMEM;
 581
 582         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 583         if (!retval)
 584                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 585                                  qtcb_port->cb_util, qtcb_port->a_util);
 586         kfree(qtcb_port);
 587         return retval;
 588 }
 589 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 590
 591 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 592                                         struct fsf_statistics_info *stat_inf)
 593 {
 594         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 595         struct fsf_qtcb_bottom_config *qtcb_config;
 596         struct zfcp_adapter *adapter;
 597         int retval;
 598
 599         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 600         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 601                 return -EOPNOTSUPP;
 602
 603         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 604                               GFP_KERNEL);
 605         if (!qtcb_config)
 606                 return -ENOMEM;
 607
 608         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 609         if (!retval)
 610                 *stat_inf = qtcb_config->stat_info;
 611
 612         kfree(qtcb_config);
 613         return retval;
 614 }
 615
 616 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 617 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 618                                                  struct device_attribute *attr,\
 619                                                  char *buf)             \
 620 {                                                                       \
 621         struct fsf_statistics_info stat_info;                           \
 622         int retval;                                                     \
 623                                                                         \
 624         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 625         if (retval)                                                     \
 626                 return retval;                                          \
 627                                                                         \
 628         return sprintf(buf, _format, ## _arg);                          \
 629 }                                                                       \
 630 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 631
 632 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 633                 (unsigned long long) stat_info.input_req,
 634                 (unsigned long long) stat_info.output_req,
 635                 (unsigned long long) stat_info.control_req);
 636
 637 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 638                 (unsigned long long) stat_info.input_mb,
 639                 (unsigned long long) stat_info.output_mb);
 640
 641 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 642                 (unsigned long long) stat_info.seconds_act);
 643
 644 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 645                                               struct device_attribute *attr,
 646                                               char *buf)
 647 {
 648         struct Scsi_Host *scsi_host = class_to_shost(dev);
 649         struct zfcp_qdio *qdio =
 650                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 651         u64 util;
 652
 653         spin_lock_bh(&qdio->stat_lock);
 654         util = qdio->req_q_util;
 655         spin_unlock_bh(&qdio->stat_lock);
 656
 657         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 658                        (unsigned long long)util);
 659 }
 660 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 661
 662 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 663         &dev_attr_utilization,
 664         &dev_attr_requests,
 665         &dev_attr_megabytes,
 666         &dev_attr_seconds_active,
 667         &dev_attr_queue_full,
 668         NULL
 669 };