drivers/s390/scsi/zfcp_sysfs_adapter.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * sysfs attributes for CCW device.
   5  *
   6  * Copyright IBM Corporation 2002, 2008
   7  */
   8
   9 #include "zfcp_ext.h"
  10
  11 /**
  12  * ZFCP_DEFINE_ADAPTER_ATTR
  13  * @_name:   name of show attribute
  14  * @_format: format string
  15  * @_value:  value to print
  16  *
  17  * Generates attributes for an adapter.
  18  */
  19 #define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value)                      \
  20 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, struct device_attribute *attr,          \
  21                                                  char *buf)                   \
  22 {                                                                             \
  23         struct zfcp_adapter *adapter;                                         \
  24                                                                               \
  25         adapter = dev_get_drvdata(dev);                                       \
  26         return sprintf(buf, _format, _value);                                 \
  27 }                                                                             \
  28                                                                               \
  29 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
  30
  31 ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
  32 ZFCP_DEFINE_ADAPTER_ATTR(peer_wwnn, "0x%016llx\n", adapter->peer_wwnn);
  33 ZFCP_DEFINE_ADAPTER_ATTR(peer_wwpn, "0x%016llx\n", adapter->peer_wwpn);
  34 ZFCP_DEFINE_ADAPTER_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
  35 ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  36 ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  37 ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n",
  38                          adapter->hardware_version);
  39 ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask
  40                          (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status));
  41
  42 /**
  43  * zfcp_sysfs_port_add_store - add a port to sysfs tree
  44  * @dev: pointer to belonging device
  45  * @buf: pointer to input buffer
  46  * @count: number of bytes in buffer
  47  *
  48  * Store function of the "port_add" attribute of an adapter.
  49  */
  50 static ssize_t
  51 zfcp_sysfs_port_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
  52 {
  53         wwn_t wwpn;
  54         char *endp;
  55         struct zfcp_adapter *adapter;
  56         struct zfcp_port *port;
  57         int retval = -EINVAL;
  58
  59         down(&zfcp_data.config_sema);
  60
  61         adapter = dev_get_drvdata(dev);
  62         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
  63                 retval = -EBUSY;
  64                 goto out;
  65         }
  66
  67         wwpn = simple_strtoull(buf, &endp, 0);
  68         if ((endp + 1) < (buf + count))
  69                 goto out;
  70
  71         port = zfcp_port_enqueue(adapter, wwpn, 0, 0);
  72         if (!port)
  73                 goto out;
  74
  75         retval = 0;
  76
  77         zfcp_erp_port_reopen(port, 0, 91, NULL);
  78         zfcp_erp_wait(port->adapter);
  79         zfcp_port_put(port);
  80  out:
  81         up(&zfcp_data.config_sema);
  82         return retval ? retval : (ssize_t) count;
  83 }
  84
  85 static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store);
  86
  87 /**
  88  * zfcp_sysfs_port_remove_store - remove a port from sysfs tree
  89  * @dev: pointer to belonging device
  90  * @buf: pointer to input buffer
  91  * @count: number of bytes in buffer
  92  *
  93  * Store function of the "port_remove" attribute of an adapter.
  94  */
  95 static ssize_t
  96 zfcp_sysfs_port_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
  97 {
  98         struct zfcp_adapter *adapter;
  99         struct zfcp_port *port;
 100         wwn_t wwpn;
 101         char *endp;
 102         int retval = 0;
 103
 104         down(&zfcp_data.config_sema);
 105
 106         adapter = dev_get_drvdata(dev);
 107         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 108                 retval = -EBUSY;
 109                 goto out;
 110         }
 111
 112         wwpn = simple_strtoull(buf, &endp, 0);
 113         if ((endp + 1) < (buf + count)) {
 114                 retval = -EINVAL;
 115                 goto out;
 116         }
 117
 118         write_lock_irq(&zfcp_data.config_lock);
 119         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 120         if (port && (atomic_read(&port->refcount) == 0)) {
 121                 zfcp_port_get(port);
 122                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
 123                 list_move(&port->list, &adapter->port_remove_lh);
 124         }
 125         else {
 126                 port = NULL;
 127         }
 128         write_unlock_irq(&zfcp_data.config_lock);
 129
 130         if (!port) {
 131                 retval = -ENXIO;
 132                 goto out;
 133         }
 134
 135         zfcp_erp_port_shutdown(port, 0, 92, NULL);
 136         zfcp_erp_wait(adapter);
 137         zfcp_port_put(port);
 138         zfcp_port_dequeue(port);
 139  out:
 140         up(&zfcp_data.config_sema);
 141         return retval ? retval : (ssize_t) count;
 142 }
 143
 144 static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store);
 145
 146 /**
 147  * zfcp_sysfs_adapter_failed_store - failed state of adapter
 148  * @dev: pointer to belonging device
 149  * @buf: pointer to input buffer
 150  * @count: number of bytes in buffer
 151  *
 152  * Store function of the "failed" attribute of an adapter.
 153  * If a "0" gets written to "failed", error recovery will be
 154  * started for the belonging adapter.
 155  */
 156 static ssize_t
 157 zfcp_sysfs_adapter_failed_store(struct device *dev, struct device_attribute *attr,
 158                                 const char *buf, size_t count)
 159 {
 160         struct zfcp_adapter *adapter;
 161         unsigned int val;
 162         char *endp;
 163         int retval = 0;
 164
 165         down(&zfcp_data.config_sema);
 166
 167         adapter = dev_get_drvdata(dev);
 168         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 169                 retval = -EBUSY;
 170                 goto out;
 171         }
 172
 173         val = simple_strtoul(buf, &endp, 0);
 174         if (((endp + 1) < (buf + count)) || (val != 0)) {
 175                 retval = -EINVAL;
 176                 goto out;
 177         }
 178
 179         zfcp_erp_modify_adapter_status(adapter, 44, NULL,
 180                                        ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
 181         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 93,
 182                                 NULL);
 183         zfcp_erp_wait(adapter);
 184  out:
 185         up(&zfcp_data.config_sema);
 186         return retval ? retval : (ssize_t) count;
 187 }
 188
 189 /**
 190  * zfcp_sysfs_adapter_failed_show - failed state of adapter
 191  * @dev: pointer to belonging device
 192  * @buf: pointer to input buffer
 193  *
 194  * Show function of "failed" attribute of adapter. Will be
 195  * "0" if adapter is working, otherwise "1".
 196  */
 197 static ssize_t
 198 zfcp_sysfs_adapter_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
 199 {
 200         struct zfcp_adapter *adapter;
 201
 202         adapter = dev_get_drvdata(dev);
 203         if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status))
 204                 return sprintf(buf, "1\n");
 205         else
 206                 return sprintf(buf, "0\n");
 207 }
 208
 209 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show,
 210                    zfcp_sysfs_adapter_failed_store);
 211
 212 static struct attribute *zfcp_adapter_attrs[] = {
 213         &dev_attr_failed.attr,
 214         &dev_attr_in_recovery.attr,
 215         &dev_attr_port_remove.attr,
 216         &dev_attr_port_add.attr,
 217         &dev_attr_peer_wwnn.attr,
 218         &dev_attr_peer_wwpn.attr,
 219         &dev_attr_peer_d_id.attr,
 220         &dev_attr_card_version.attr,
 221         &dev_attr_lic_version.attr,
 222         &dev_attr_status.attr,
 223         &dev_attr_hardware_version.attr,
 224         NULL
 225 };
 226
 227 static struct attribute_group zfcp_adapter_attr_group = {
 228         .attrs = zfcp_adapter_attrs,
 229 };
 230
 231 /**
 232  * zfcp_sysfs_create_adapter_files - create sysfs adapter files
 233  * @dev: pointer to belonging device
 234  *
 235  * Create all attributes of the sysfs representation of an adapter.
 236  */
 237 int
 238 zfcp_sysfs_adapter_create_files(struct device *dev)
 239 {
 240         return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group);
 241 }
 242
 243 /**
 244  * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files
 245  * @dev: pointer to belonging device
 246  *
 247  * Remove all attributes of the sysfs representation of an adapter.
 248  */
 249 void
 250 zfcp_sysfs_adapter_remove_files(struct device *dev)
 251 {
 252         sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group);
 253 }