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