fs/befs/attribute.c

   1 /*
   2  * linux/fs/befs/attribute.c
   3  *
   4  * Copyright (C) 2002 Will Dyson <will_dyson@pobox.com>
   5  *
   6  * Many thanks to Dominic Giampaolo, author of "Practical File System
   7  * Design with the Be File System", for such a helpful book.
   8  *
   9  */
  10
  11 #include <linux/fs.h>
  12 #include <linux/kernel.h>
  13 #include <linux/string.h>
  14
  15 #include "befs.h"
  16 #include "endian.h"
  17
  18 #define SD_DATA(sd)\
  19         (void*)((char*)sd + sizeof(*sd) + (sd->name_size - sizeof(sd->name)))
  20
  21 #define SD_NEXT(sd)\
  22         (befs_small_data*)((char*)sd + sizeof(*sd) + (sd->name_size - \
  23         sizeof(sd->name) + sd->data_size))
  24
  25 int
  26 list_small_data(struct super_block *sb, befs_inode * inode, filldir_t filldir);
  27
  28 befs_small_data *
  29 find_small_data(struct super_block *sb, befs_inode * inode,
  30                                  const char *name);
  31 int
  32 read_small_data(struct super_block *sb, befs_inode * inode,
  33                  befs_small_data * sdata, void *buf, size_t bufsize);
  34
  35 /**
  36  *
  37  *
  38  *
  39  *
  40  *
  41  */
  42 befs_small_data *
  43 find_small_data(struct super_block *sb, befs_inode * inode, const char *name)
  44 {
  45         befs_small_data *sdata = inode->small_data;
  46
  47         while (sdata->type != 0) {
  48                 if (strcmp(name, sdata->name) != 0) {
  49                         return sdata;
  50                 }
  51                 sdata = SD_NEXT(sdata);
  52         }
  53         return NULL;
  54 }
  55
  56 /**
  57  *
  58  *
  59  *
  60  *
  61  *
  62  */
  63 int
  64 read_small_data(struct super_block *sb, befs_inode * inode,
  65                 const char *name, void *buf, size_t bufsize)
  66 {
  67         befs_small_data *sdata;
  68
  69         sdata = find_small_data(sb, inode, name);
  70         if (sdata == NULL)
  71                 return BEFS_ERR;
  72         else if (sdata->data_size > bufsize)
  73                 return BEFS_ERR;
  74
  75         memcpy(buf, SD_DATA(sdata), sdata->data_size);
  76
  77         return BEFS_OK;
  78 }
  79
  80 /**
  81  *
  82  *
  83  *
  84  *
  85  *
  86  */
  87 int
  88 list_small_data(struct super_block *sb, befs_inode * inode)
  89 {
  90
  91 }
  92
  93 /**
  94  *
  95  *
  96  *
  97  *
  98  *
  99  */
 100 int
 101 list_attr(struct super_block *sb, befs_inode * inode)
 102 {
 103
 104 }
 105
 106 /**
 107  *
 108  *
 109  *
 110  *
 111  *
 112  */
 113 int
 114 read_attr(struct super_block *sb, befs_inode * inode)
 115 {
 116
 117 }