fsck/fsck.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  Copyright (C) 2020 Hyunchul Lee <hyc.lee@gmail.com>
   4  */
   5 #ifndef _FSCK_H
   6 #define _FSCK_H
   7
   8 #include "list.h"
   9
  10 typedef __u32 clus_t;
  11
  12 struct exfat_inode {
  13         struct exfat_inode      *parent;
  14         struct list_head        children;
  15         struct list_head        sibling;
  16         struct list_head        list;
  17         clus_t                  first_clus;
  18         clus_t                  last_lclus;
  19         clus_t                  last_pclus;
  20         __u16                   attr;
  21         uint64_t                size;
  22         bool                    is_contiguous;
  23         __le16                  name[0];        /* only for directory */
  24 };
  25
  26 #define EXFAT_NAME_MAX                  255
  27 #define NAME_BUFFER_SIZE                ((EXFAT_NAME_MAX+1)*2)
  28
  29 struct buffer_desc {
  30         clus_t          p_clus;
  31         unsigned int    offset;
  32         char            *buffer;
  33         char            *dirty;
  34 };
  35
  36 struct exfat_de_iter {
  37         struct exfat            *exfat;
  38         struct exfat_inode      *parent;
  39         struct buffer_desc      *buffer_desc;           /* cluster * 2 */
  40         clus_t                  ra_next_clus;
  41         unsigned int            ra_begin_offset;
  42         unsigned int            ra_partial_size;
  43         unsigned int            read_size;              /* cluster size */
  44         unsigned int            write_size;             /* sector size */
  45         off_t                   de_file_offset;
  46         off_t                   next_read_offset;
  47         int                     max_skip_dentries;
  48 };
  49
  50 enum fsck_ui_options {
  51         FSCK_OPTS_REPAIR_ASK    = 0x01,
  52         FSCK_OPTS_REPAIR_YES    = 0x02,
  53         FSCK_OPTS_REPAIR_NO     = 0x04,
  54         FSCK_OPTS_REPAIR_AUTO   = 0x08,
  55         FSCK_OPTS_REPAIR_WRITE  = 0x0b,
  56         FSCK_OPTS_REPAIR_ALL    = 0x0f,
  57 };
  58
  59 struct exfat {
  60         enum fsck_ui_options    options;
  61         bool                    dirty:1;
  62         bool                    dirty_fat:1;
  63         struct exfat_blk_dev    *blk_dev;
  64         struct pbr              *bs;
  65         char                    volume_label[VOLUME_LABEL_BUFFER_SIZE];
  66         struct exfat_inode      *root;
  67         struct list_head        dir_list;
  68         clus_t                  clus_count;
  69         unsigned int            clus_size;
  70         unsigned int            sect_size;
  71         struct exfat_de_iter    de_iter;
  72         struct buffer_desc      buffer_desc[2]; /* cluster * 2 */
  73         char                    *alloc_bitmap;
  74         char                    *disk_bitmap;
  75         clus_t                  disk_bitmap_clus;
  76         unsigned int            disk_bitmap_size;
  77 };
  78
  79 #define EXFAT_CLUSTER_SIZE(pbr) (1 << ((pbr)->bsx.sect_size_bits +      \
  80                                         (pbr)->bsx.sect_per_clus_bits))
  81 #define EXFAT_SECTOR_SIZE(pbr) (1 << (pbr)->bsx.sect_size_bits)
  82
  83 /* fsck.c */
  84 off_t exfat_c2o(struct exfat *exfat, unsigned int clus);
  85 int get_next_clus(struct exfat *exfat, struct exfat_inode *node,
  86                                 clus_t clus, clus_t *next);
  87
  88 /* de_iter.c */
  89 int exfat_de_iter_init(struct exfat_de_iter *iter, struct exfat *exfat,
  90                                 struct exfat_inode *dir);
  91 int exfat_de_iter_get(struct exfat_de_iter *iter,
  92                         int ith, struct exfat_dentry **dentry);
  93 int exfat_de_iter_get_dirty(struct exfat_de_iter *iter,
  94                         int ith, struct exfat_dentry **dentry);
  95 int exfat_de_iter_flush(struct exfat_de_iter *iter);
  96 int exfat_de_iter_advance(struct exfat_de_iter *iter, int skip_dentries);
  97 off_t exfat_de_iter_file_offset(struct exfat_de_iter *iter);
  98
  99 #endif