lunaix-os/kernel/fs/defaults.c

   1 #include <lunaix/fs/api.h>
   2
   3 int
   4 default_file_close(struct v_file* file)
   5 {
   6     return 0;
   7 }
   8
   9 int
  10 default_file_seek(struct v_file* file, size_t offset)
  11 {
  12     file->f_pos = offset;
  13     return 0;
  14 }
  15
  16 int
  17 default_inode_open(struct v_inode* this, struct v_file* file)
  18 {
  19     return 0;
  20 }
  21
  22 int
  23 default_file_read(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
  24 {
  25     return ENOTSUP;
  26 }
  27
  28 int
  29 default_file_write(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
  30 {
  31     return ENOTSUP;
  32 }
  33
  34 int
  35 default_file_read_page(struct v_inode* inode, void* buffer, size_t fpos)
  36 {
  37     return ENOTSUP;
  38 }
  39
  40 int
  41 default_file_write_page(struct v_inode* inode, void* buffer, size_t fpos)
  42 {
  43     return ENOTSUP;
  44 }
  45
  46 int
  47 default_file_readdir(struct v_file* file, struct dir_context* dctx)
  48 {
  49     unsigned int i = 0;
  50     struct v_dnode *pos, *n;
  51
  52     if (fsapi_handle_pseudo_dirent(file, dctx)) {
  53         return 1;
  54     }
  55
  56     llist_for_each(pos, n, &file->dnode->children, siblings)
  57     {
  58         if (i < file->f_pos) {
  59             i++;
  60             continue;
  61         }
  62         dctx->read_complete_callback(dctx, pos->name.value, pos->name.len, 0);
  63         return 1;
  64     }
  65
  66     return 0;
  67 }
  68
  69 int
  70 default_inode_dirlookup(struct v_inode* this, struct v_dnode* dnode)
  71 {
  72     return ENOENT;
  73 }
  74
  75 int
  76 default_inode_rename(struct v_inode* from_inode,
  77                      struct v_dnode* from_dnode,
  78                      struct v_dnode* to_dnode)
  79 {
  80     return 0;
  81 }
  82
  83 int
  84 default_inode_sync(struct v_inode* this)
  85 {
  86     return 0;
  87 }
  88
  89 int
  90 default_inode_rmdir(struct v_inode* this, struct v_dnode* dir)
  91 {
  92     return ENOTSUP;
  93 }
  94
  95 int
  96 default_inode_mkdir(struct v_inode* this, struct v_dnode* dir)
  97 {
  98     return ENOTSUP;
  99 }
 100
 101 struct v_file_ops default_file_ops = { .close = default_file_close,
 102                                        .read = default_file_read,
 103                                        .seek = default_file_seek,
 104                                        .readdir = default_file_readdir };
 105
 106 struct v_inode_ops default_inode_ops = { .dir_lookup = default_inode_dirlookup,
 107                                          .sync = default_inode_sync,
 108                                          .open = default_inode_open,
 109                                          .rename = default_inode_rename,
 110                                          .rmdir = default_inode_rmdir };