lunaix-os/includes/lunaix/fs/twifs.h

   1 #ifndef __LUNAIX_TWIFS_H
   2 #define __LUNAIX_TWIFS_H
   3
   4 #include <lunaix/ds/ldga.h>
   5 #include <lunaix/fs.h>
   6 #include <lunaix/fs/twimap.h>
   7 #include <lunaix/spike.h>
   8
   9 struct twifs_ops
  10 {
  11     int (*write)(struct v_inode* inode,
  12                     void* buffer,
  13                     size_t len,
  14                     size_t fpos);
  15     int (*read)(struct v_inode* inode,
  16                 void* buffer,
  17                 size_t len,
  18                 size_t fpos);
  19 };
  20
  21 struct twifs_node
  22 {
  23     struct hstr name;
  24     inode_t ino_id;
  25     void* data;
  26     u32_t itype;
  27     int acl;
  28
  29     char name_val[VFS_NAME_MAXLEN];
  30     struct llist_header children;
  31     struct llist_header siblings;
  32     struct twifs_ops ops;
  33 };
  34
  35 struct twifs_export
  36 {
  37     char* name;
  38     int acl;
  39     struct twifs_ops ops;
  40 };
  41
  42 struct twimap_export
  43 {
  44     char* name;
  45     int acl;
  46     struct twimap_ops ops;
  47 };
  48
  49 #define twinode_getdata(inode, type)                                           \
  50     ({                                                                         \
  51         struct twifs_node* twinode = (struct twifs_node*)(inode)->data;        \
  52         assert(twinode);                                                       \
  53         (type) twinode->data;                                                  \
  54     })
  55
  56 #define EXPORT_TWIFS_PLUGIN(label, plg_init)                                   \
  57     export_ldga_el(twiplugin_inits, label, ptr_t, plg_init)
  58
  59 #define __twifs_export_base(name_, acl_) \
  60             .name=stringify(name_), .acl=(acl_)
  61
  62 #define twifs_node_ro(name_, acl_)                        \
  63         struct twifs_export __twifs_exp_##name_ =           \
  64             { __twifs_export_base(name_, acl_),             \
  65                 .ops = { .read =  __twifs_read_##name_ }}
  66
  67 #define twifs_node_rw(name_, acl_)                        \
  68         struct twifs_export __twifs_exp_##name_ =           \
  69             { __twifs_export_base(name_, acl_),             \
  70                 .ops = { .read =  __twifs_read_##name_,         \
  71                          .write =  __twifs_write_##name_ }}
  72
  73 #define twimap_value_export(name_, acl_)                    \
  74         struct twimap_export __twimap_exp_##name_ =          \
  75             { __twifs_export_base(name_, acl_),             \
  76                 .ops = { .read =  __twimap_read_##name_ }}
  77
  78 #define twimap_list_export(name_, acl_)                     \
  79         struct twimap_export __twimap_exp_##name_ =          \
  80             { __twifs_export_base(name_, acl_),             \
  81                 .ops = { .read =  __twimap_read_##name_,         \
  82                          .go_next =  __twimap_gonext_##name_,   \
  83                          .reset =  __twimap_reset_##name_, }}
  84
  85 #define twifs_export(parent, name_, data_)      \
  86         twifs_basic_node_from(parent, &__twifs_exp_##name_, data_)
  87
  88 #define twimap_export(parent, name_, data_)      \
  89         twifs_mapped_node_from(parent, &__twimap_exp_##name_, data_)
  90
  91 #define twifs_export_ro(parent, name_, acl_, data_)                     \
  92         ({                                                              \
  93             twifs_node_ro(name_, acl_);                                 \
  94             twifs_export(parent, name_, data_);                        \
  95         })
  96
  97 #define twimap_export_value(parent, name_, acl_, data_)                 \
  98         ({                                                              \
  99             twimap_value_export(name_, acl_);                           \
 100             twimap_export(parent, name_, data_);                        \
 101         })
 102
 103 #define twimap_export_list(parent, name_, acl_, data_)                  \
 104         ({                                                              \
 105             twimap_list_export(name_, acl_);                            \
 106             twimap_export(parent, name_, data_);                        \
 107         })
 108
 109 void
 110 twifs_register_plugins();
 111
 112 struct twifs_node*
 113 twifs_file_node_vargs(struct twifs_node* parent, const char* fmt, va_list args);
 114
 115 struct twifs_node*
 116 twifs_dir_node(struct twifs_node* parent, const char* fmt, ...);
 117
 118 int
 119 twifs_rm_node(struct twifs_node* node);
 120
 121 struct twifs_node*
 122 twifs_basic_node_from(struct twifs_node* parent,
 123                         struct twifs_export* exp_def, void* data);
 124
 125 struct twifs_node*
 126 twifs_mapped_node_from(struct twifs_node* parent,
 127                         struct twimap_export* exp_def, void* data);
 128
 129 struct twimap*
 130 twifs_mapping(struct twifs_node* parent,
 131                 void* data, int acl, const char* fmt, ...);
 132
 133 #endif /* __LUNAIX_TWIFS_H */