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Diffstat (limited to 'fs/sdfat/core.h')
| -rw-r--r-- | fs/sdfat/core.h | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/fs/sdfat/core.h b/fs/sdfat/core.h new file mode 100644 index 000000000000..1f8ed5a28ef3 --- /dev/null +++ b/fs/sdfat/core.h @@ -0,0 +1,221 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef _SDFAT_CORE_H +#define _SDFAT_CORE_H + +#include <asm/byteorder.h> + +#include "config.h" +#include "api.h" +#include "upcase.h" + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/*----------------------------------------------------------------------*/ +/* Constant & Macro Definitions */ +/*----------------------------------------------------------------------*/ +#define get_next_clus(sb, pclu) fat_ent_get(sb, *(pclu), pclu) +#define get_next_clus_safe(sb, pclu) fat_ent_get_safe(sb, *(pclu), pclu) + +/* file status */ +/* this prevents + * fscore_write_inode, fscore_map_clus, ... with the unlinked inodes + * from corrupting on-disk dentry data. + * + * The fid->dir value of unlinked inode will be DIR_DELETED + * and those functions must check if fid->dir is valid prior to + * the calling of get_dentry_in_dir() + */ +#define DIR_DELETED 0xFFFF0321 + +/*----------------------------------------------------------------------*/ +/* Type Definitions */ +/*----------------------------------------------------------------------*/ +#define ES_2_ENTRIES 2 +#define ES_3_ENTRIES 3 +#define ES_ALL_ENTRIES 0 + +typedef struct { + u64 sector; // sector number that contains file_entry + u32 offset; // byte offset in the sector + s32 alloc_flag; // flag in stream entry. 01 for cluster chain, 03 for contig. clusters. + u32 num_entries; + void *__buf; // __buf should be the last member +} ENTRY_SET_CACHE_T; + + + +/*----------------------------------------------------------------------*/ +/* External Function Declarations */ +/*----------------------------------------------------------------------*/ + +/* file system initialization & shutdown functions */ +s32 fscore_init(void); +s32 fscore_shutdown(void); + +/* bdev management */ +s32 fscore_check_bdi_valid(struct super_block *sb); + +/* chain management */ +s32 chain_cont_cluster(struct super_block *sb, u32 chain, u32 len); + +/* volume management functions */ +s32 fscore_mount(struct super_block *sb); +s32 fscore_umount(struct super_block *sb); +s32 fscore_statfs(struct super_block *sb, VOL_INFO_T *info); +s32 fscore_sync_fs(struct super_block *sb, s32 do_sync); +s32 fscore_set_vol_flags(struct super_block *sb, u16 new_flag, s32 always_sync); +u32 fscore_get_au_stat(struct super_block *sb, s32 mode); + +/* file management functions */ +s32 fscore_lookup(struct inode *inode, u8 *path, FILE_ID_T *fid); +s32 fscore_create(struct inode *inode, u8 *path, u8 mode, FILE_ID_T *fid); +s32 fscore_read_link(struct inode *inode, FILE_ID_T *fid, void *buffer, u64 count, u64 *rcount); +s32 fscore_write_link(struct inode *inode, FILE_ID_T *fid, void *buffer, u64 count, u64 *wcount); +s32 fscore_truncate(struct inode *inode, u64 old_size, u64 new_size); +s32 fscore_rename(struct inode *old_parent_inode, FILE_ID_T *fid, + struct inode *new_parent_inode, struct dentry *new_dentry); +s32 fscore_remove(struct inode *inode, FILE_ID_T *fid); +s32 fscore_read_inode(struct inode *inode, DIR_ENTRY_T *info); +s32 fscore_write_inode(struct inode *inode, DIR_ENTRY_T *info, int sync); +s32 fscore_map_clus(struct inode *inode, u32 clu_offset, u32 *clu, int dest); +s32 fscore_reserve_clus(struct inode *inode); +s32 fscore_unlink(struct inode *inode, FILE_ID_T *fid); + +/* directory management functions */ +s32 fscore_mkdir(struct inode *inode, u8 *path, FILE_ID_T *fid); +s32 fscore_readdir(struct inode *inode, DIR_ENTRY_T *dir_ent); +s32 fscore_rmdir(struct inode *inode, FILE_ID_T *fid); + + +/*----------------------------------------------------------------------*/ +/* External Function Declarations (NOT TO UPPER LAYER) */ +/*----------------------------------------------------------------------*/ + +/* core.c : core code for common */ +/* dir entry management functions */ +DENTRY_T *get_dentry_in_dir(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u64 *sector); + +/* name conversion functions */ +void get_uniname_from_dos_entry(struct super_block *sb, DOS_DENTRY_T *ep, UNI_NAME_T *p_uniname, u8 mode); + +/* file operation functions */ +s32 walk_fat_chain(struct super_block *sb, CHAIN_T *p_dir, u32 byte_offset, u32 *clu); + +/* sdfat/cache.c */ +s32 meta_cache_init(struct super_block *sb); +s32 meta_cache_shutdown(struct super_block *sb); +u8 *fcache_getblk(struct super_block *sb, u64 sec); +s32 fcache_modify(struct super_block *sb, u64 sec); +s32 fcache_release_all(struct super_block *sb); +s32 fcache_flush(struct super_block *sb, u32 sync); + +u8 *dcache_getblk(struct super_block *sb, u64 sec); +s32 dcache_modify(struct super_block *sb, u64 sec); +s32 dcache_lock(struct super_block *sb, u64 sec); +s32 dcache_unlock(struct super_block *sb, u64 sec); +s32 dcache_release(struct super_block *sb, u64 sec); +s32 dcache_release_all(struct super_block *sb); +s32 dcache_flush(struct super_block *sb, u32 sync); +s32 dcache_readahead(struct super_block *sb, u64 sec); + + +/* fatent.c */ +s32 fat_ent_ops_init(struct super_block *sb); +s32 fat_ent_get(struct super_block *sb, u32 loc, u32 *content); +s32 fat_ent_set(struct super_block *sb, u32 loc, u32 content); +s32 fat_ent_get_safe(struct super_block *sb, u32 loc, u32 *content); + +/* core_fat.c : core code for fat */ +s32 fat_generate_dos_name_new(struct super_block *sb, CHAIN_T *p_dir, DOS_NAME_T *p_dosname, s32 n_entries); +s32 mount_fat16(struct super_block *sb, pbr_t *p_pbr); +s32 mount_fat32(struct super_block *sb, pbr_t *p_pbr); + +/* core_exfat.c : core code for exfat */ + +s32 load_alloc_bmp(struct super_block *sb); +void free_alloc_bmp(struct super_block *sb); +ENTRY_SET_CACHE_T *get_dentry_set_in_dir(struct super_block *sb, + CHAIN_T *p_dir, s32 entry, u32 type, DENTRY_T **file_ep); +void release_dentry_set(ENTRY_SET_CACHE_T *es); +s32 update_dir_chksum(struct super_block *sb, CHAIN_T *p_dir, s32 entry); +s32 update_dir_chksum_with_entry_set(struct super_block *sb, ENTRY_SET_CACHE_T *es); +bool is_dir_empty(struct super_block *sb, CHAIN_T *p_dir); +s32 mount_exfat(struct super_block *sb, pbr_t *p_pbr); + +/* amap_smart.c : creation on mount / destroy on umount */ +int amap_create(struct super_block *sb, u32 pack_ratio, u32 sect_per_au, u32 hidden_sect); +void amap_destroy(struct super_block *sb); + +/* amap_smart.c : (de)allocation functions */ +s32 amap_fat_alloc_cluster(struct super_block *sb, u32 num_alloc, CHAIN_T *p_chain, s32 dest); +s32 amap_free_cluster(struct super_block *sb, CHAIN_T *p_chain, s32 do_relse);/* Not impelmented */ +s32 amap_release_cluster(struct super_block *sb, u32 clu); /* Only update AMAP */ + +/* amap_smart.c : misc (for defrag) */ +s32 amap_mark_ignore(struct super_block *sb, u32 clu); +s32 amap_unmark_ignore(struct super_block *sb, u32 clu); +s32 amap_unmark_ignore_all(struct super_block *sb); +s32 amap_check_working(struct super_block *sb, u32 clu); +s32 amap_get_freeclus(struct super_block *sb, u32 clu); + +/* amap_smart.c : stat AU */ +u32 amap_get_au_stat(struct super_block *sb, s32 mode); + + +/* blkdev.c */ +s32 bdev_open_dev(struct super_block *sb); +s32 bdev_close_dev(struct super_block *sb); +s32 bdev_check_bdi_valid(struct super_block *sb); +s32 bdev_readahead(struct super_block *sb, u64 secno, u64 num_secs); +s32 bdev_mread(struct super_block *sb, u64 secno, struct buffer_head **bh, u64 num_secs, s32 read); +s32 bdev_mwrite(struct super_block *sb, u64 secno, struct buffer_head *bh, u64 num_secs, s32 sync); +s32 bdev_sync_all(struct super_block *sb); + +/* blkdev.c : sector read/write functions */ +s32 read_sect(struct super_block *sb, u64 sec, struct buffer_head **bh, s32 read); +s32 write_sect(struct super_block *sb, u64 sec, struct buffer_head *bh, s32 sync); +s32 read_msect(struct super_block *sb, u64 sec, struct buffer_head **bh, s64 num_secs, s32 read); +s32 write_msect(struct super_block *sb, u64 sec, struct buffer_head *bh, s64 num_secs, s32 sync); +s32 write_msect_zero(struct super_block *sb, u64 sec, u64 num_secs); + +/* misc.c */ +u8 calc_chksum_1byte(void *data, s32 len, u8 chksum); +u16 calc_chksum_2byte(void *data, s32 len, u16 chksum, s32 type); + +/* extent.c */ +s32 extent_cache_init(void); +void extent_cache_shutdown(void); +void extent_cache_init_inode(struct inode *inode); +void extent_cache_inval_inode(struct inode *inode); +s32 extent_get_clus(struct inode *inode, u32 cluster, u32 *fclus, + u32 *dclus, u32 *last_dclus, s32 allow_eof); +/*----------------------------------------------------------------------*/ +/* Wrapper Function */ +/*----------------------------------------------------------------------*/ +void set_sb_dirty(struct super_block *sb); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* _SDFAT_CORE_H */ + +/* end of core.h */ |