include/target/target_core_backend_configfs.h

   1 #ifndef TARGET_CORE_BACKEND_CONFIGFS_H
   2 #define TARGET_CORE_BACKEND_CONFIGFS_H
   3
   4 #include <target/configfs_macros.h>
   5
   6 #define DEF_TB_DEV_ATTRIB_SHOW(_backend, _name)                         \
   7 static ssize_t _backend##_dev_show_attr_##_name(                        \
   8         struct se_dev_attrib *da,                                       \
   9         char *page)                                                     \
  10 {                                                                       \
  11         return snprintf(page, PAGE_SIZE, "%u\n",                        \
  12                         (u32)da->da_dev->dev_attrib._name);             \
  13 }
  14
  15 #define DEF_TB_DEV_ATTRIB_STORE(_backend, _name)                        \
  16 static ssize_t _backend##_dev_store_attr_##_name(                       \
  17         struct se_dev_attrib *da,                                       \
  18         const char *page,                                               \
  19         size_t count)                                                   \
  20 {                                                                       \
  21         unsigned long val;                                              \
  22         int ret;                                                        \
  23                                                                         \
  24         ret = kstrtoul(page, 0, &val);                                  \
  25         if (ret < 0) {                                                  \
  26                 pr_err("kstrtoul() failed with ret: %d\n", ret);        \
  27                 return -EINVAL;                                         \
  28         }                                                               \
  29         ret = se_dev_set_##_name(da->da_dev, (u32)val);                 \
  30                                                                         \
  31         return (!ret) ? count : -EINVAL;                                \
  32 }
  33
  34 #define DEF_TB_DEV_ATTRIB(_backend, _name)                              \
  35 DEF_TB_DEV_ATTRIB_SHOW(_backend, _name);                                \
  36 DEF_TB_DEV_ATTRIB_STORE(_backend, _name);
  37
  38 #define DEF_TB_DEV_ATTRIB_RO(_backend, name)                            \
  39 DEF_TB_DEV_ATTRIB_SHOW(_backend, name);
  40
  41 CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib);
  42 #define TB_DEV_ATTR(_backend, _name, _mode)                             \
  43 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
  44                 __CONFIGFS_EATTR(_name, _mode,                          \
  45                 _backend##_dev_show_attr_##_name,                       \
  46                 _backend##_dev_store_attr_##_name);
  47
  48 #define TB_DEV_ATTR_RO(_backend, _name)                                         \
  49 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
  50         __CONFIGFS_EATTR_RO(_name,                                      \
  51         _backend##_dev_show_attr_##_name);
  52
  53 #endif /* TARGET_CORE_BACKEND_CONFIGFS_H */