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/*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/************************************************************************/
/* */
/* PROJECT : exFAT & FAT12/16/32 File System */
/* FILE : exfat_api.c */
/* PURPOSE : exFAT API Glue Layer */
/* */
/*----------------------------------------------------------------------*/
/* NOTES */
/* */
/*----------------------------------------------------------------------*/
/* REVISION HISTORY (Ver 0.9) */
/* */
/* - 2010.11.15 [Joosun Hahn] : first writing */
/* */
/************************************************************************/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include "exfat_version.h"
#include "exfat_config.h"
#include "exfat_data.h"
#include "exfat_oal.h"
#include "exfat_nls.h"
#include "exfat_api.h"
#include "exfat_super.h"
#include "exfat_core.h"
/*----------------------------------------------------------------------*/
/* Constant & Macro Definitions */
/*----------------------------------------------------------------------*/
/*----------------------------------------------------------------------*/
/* Global Variable Definitions */
/*----------------------------------------------------------------------*/
extern struct semaphore z_sem;
/*----------------------------------------------------------------------*/
/* Local Variable Definitions */
/*----------------------------------------------------------------------*/
/*----------------------------------------------------------------------*/
/* Local Function Declarations */
/*----------------------------------------------------------------------*/
/*======================================================================*/
/* Global Function Definitions */
/* - All functions for global use have same return value format, */
/* that is, FFS_SUCCESS on success and several FS error code on */
/* various error condition. */
/*======================================================================*/
/*----------------------------------------------------------------------*/
/* exFAT Filesystem Init & Exit Functions */
/*----------------------------------------------------------------------*/
int FsInit(void)
{
return ffsInit();
}
int FsShutdown(void)
{
return ffsShutdown();
}
/*----------------------------------------------------------------------*/
/* Volume Management Functions */
/*----------------------------------------------------------------------*/
/* FsMountVol : mount the file system volume */
int FsMountVol(struct super_block *sb)
{
int err;
sm_P(&z_sem);
err = buf_init(sb);
if (!err)
err = ffsMountVol(sb);
else
buf_shutdown(sb);
sm_V(&z_sem);
return err;
} /* end of FsMountVol */
/* FsUmountVol : unmount the file system volume */
int FsUmountVol(struct super_block *sb)
{
int err;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
sm_P(&z_sem);
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsUmountVol(sb);
buf_shutdown(sb);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
sm_V(&z_sem);
return err;
} /* end of FsUmountVol */
/* FsGetVolInfo : get the information of a file system volume */
int FsGetVolInfo(struct super_block *sb, VOL_INFO_T *info)
{
int err;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of pointer parameters */
if (info == NULL)
return FFS_ERROR;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsGetVolInfo(sb, info);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsGetVolInfo */
/* FsSyncVol : synchronize a file system volume */
int FsSyncVol(struct super_block *sb, int do_sync)
{
int err;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsSyncVol(sb, do_sync);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsSyncVol */
/*----------------------------------------------------------------------*/
/* File Operation Functions */
/*----------------------------------------------------------------------*/
/* FsCreateFile : create a file */
int FsLookupFile(struct inode *inode, char *path, FILE_ID_T *fid)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of pointer parameters */
if ((fid == NULL) || (path == NULL) || (*path == '\0'))
return FFS_ERROR;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsLookupFile(inode, path, fid);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsLookupFile */
/* FsCreateFile : create a file */
int FsCreateFile(struct inode *inode, char *path, u8 mode, FILE_ID_T *fid)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of pointer parameters */
if ((fid == NULL) || (path == NULL) || (*path == '\0'))
return FFS_ERROR;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsCreateFile(inode, path, mode, fid);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsCreateFile */
int FsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, u64 count, u64 *rcount)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of the given file id */
if (fid == NULL)
return FFS_INVALIDFID;
/* check the validity of pointer parameters */
if (buffer == NULL)
return FFS_ERROR;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsReadFile(inode, fid, buffer, count, rcount);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsReadFile */
int FsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, u64 count, u64 *wcount)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of the given file id */
if (fid == NULL)
return FFS_INVALIDFID;
/* check the validity of pointer parameters */
if (buffer == NULL)
return FFS_ERROR;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsWriteFile(inode, fid, buffer, count, wcount);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsWriteFile */
/* FsTruncateFile : resize the file length */
int FsTruncateFile(struct inode *inode, u64 old_size, u64 new_size)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
DPRINTK("FsTruncateFile entered (inode %p size %llu)\n", inode, new_size);
err = ffsTruncateFile(inode, old_size, new_size);
DPRINTK("FsTruncateFile exitted (%d)\n", err);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsTruncateFile */
/* FsMoveFile : move(rename) a old file into a new file */
int FsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry)
{
int err;
struct super_block *sb = old_parent_inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of the given file id */
if (fid == NULL)
return FFS_INVALIDFID;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsMoveFile(old_parent_inode, fid, new_parent_inode, new_dentry);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsMoveFile */
/* FsRemoveFile : remove a file */
int FsRemoveFile(struct inode *inode, FILE_ID_T *fid)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of the given file id */
if (fid == NULL)
return FFS_INVALIDFID;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsRemoveFile(inode, fid);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsRemoveFile */
/* FsSetAttr : set the attribute of a given file */
int FsSetAttr(struct inode *inode, u32 attr)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsSetAttr(inode, attr);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsSetAttr */
/* FsReadStat : get the information of a given file */
int FsReadStat(struct inode *inode, DIR_ENTRY_T *info)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsGetStat(inode, info);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsReadStat */
/* FsWriteStat : set the information of a given file */
int FsWriteStat(struct inode *inode, DIR_ENTRY_T *info)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
DPRINTK("FsWriteStat entered (inode %p info %p\n", inode, info);
err = ffsSetStat(inode, info);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
DPRINTK("FsWriteStat exited (%d)\n", err);
return err;
} /* end of FsWriteStat */
/* FsMapCluster : return the cluster number in the given cluster offset */
int FsMapCluster(struct inode *inode, s32 clu_offset, u32 *clu)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of pointer parameters */
if (clu == NULL)
return FFS_ERROR;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsMapCluster(inode, clu_offset, clu);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsMapCluster */
/*----------------------------------------------------------------------*/
/* Directory Operation Functions */
/*----------------------------------------------------------------------*/
/* FsCreateDir : create(make) a directory */
int FsCreateDir(struct inode *inode, char *path, FILE_ID_T *fid)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of pointer parameters */
if ((fid == NULL) || (path == NULL) || (*path == '\0'))
return FFS_ERROR;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsCreateDir(inode, path, fid);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsCreateDir */
/* FsReadDir : read a directory entry from the opened directory */
int FsReadDir(struct inode *inode, DIR_ENTRY_T *dir_entry)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of pointer parameters */
if (dir_entry == NULL)
return FFS_ERROR;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsReadDir(inode, dir_entry);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsReadDir */
/* FsRemoveDir : remove a directory */
int FsRemoveDir(struct inode *inode, FILE_ID_T *fid)
{
int err;
struct super_block *sb = inode->i_sb;
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* check the validity of the given file id */
if (fid == NULL)
return FFS_INVALIDFID;
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
err = ffsRemoveDir(inode, fid);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return err;
} /* end of FsRemoveDir */
EXPORT_SYMBOL(FsMountVol);
EXPORT_SYMBOL(FsUmountVol);
EXPORT_SYMBOL(FsGetVolInfo);
EXPORT_SYMBOL(FsSyncVol);
EXPORT_SYMBOL(FsLookupFile);
EXPORT_SYMBOL(FsCreateFile);
EXPORT_SYMBOL(FsReadFile);
EXPORT_SYMBOL(FsWriteFile);
EXPORT_SYMBOL(FsTruncateFile);
EXPORT_SYMBOL(FsMoveFile);
EXPORT_SYMBOL(FsRemoveFile);
EXPORT_SYMBOL(FsSetAttr);
EXPORT_SYMBOL(FsReadStat);
EXPORT_SYMBOL(FsWriteStat);
EXPORT_SYMBOL(FsMapCluster);
EXPORT_SYMBOL(FsCreateDir);
EXPORT_SYMBOL(FsReadDir);
EXPORT_SYMBOL(FsRemoveDir);
#ifdef CONFIG_EXFAT_KERNEL_DEBUG
/* FsReleaseCache: Release FAT & buf cache */
int FsReleaseCache(struct super_block *sb)
{
FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
/* acquire the lock for file system critical section */
sm_P(&p_fs->v_sem);
FAT_release_all(sb);
buf_release_all(sb);
/* release the lock for file system critical section */
sm_V(&p_fs->v_sem);
return 0;
}
/* FsReleaseCache */
EXPORT_SYMBOL(FsReleaseCache);
#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
/*======================================================================*/
/* Local Function Definitions */
/*======================================================================*/