threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/*
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* Copyright (C) 2015 MediaTek Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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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#include <linux/fs.h>
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#include <asm/segment.h>
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#include <linux/uaccess.h>
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#include <linux/buffer_head.h>
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#include "tz_fileio.h"
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/** FILE_Open
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* Open a file for read or write
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*
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* @param path File path to open
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* @param flags Access flag see open(2)
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* @param mode The mode/permission for created file, see open(2)
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* @retval File handle
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*/
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struct file *FILE_Open(const char *path, int flags, int mode)
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{
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struct file *filp = NULL;
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mm_segment_t oldfs;
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int err = 0;
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oldfs = get_fs();
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set_fs(get_ds());
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filp = filp_open(path, flags, mode);
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set_fs(oldfs);
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if (IS_ERR(filp)) {
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err = PTR_ERR(filp);
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return NULL;
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}
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return filp;
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}
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/** FILE_Read
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* Read data from a file.
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*
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* @param file Opened file handle
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* @param offset Pointer to begin offset to read.
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* @param data user's buffer address.
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* @param size readdata length in bytes.
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* @retval >0 SUCCESS, return actual bytes read.
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* @retval <0 Fail, errno
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*/
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int FILE_Read(struct file *file, unsigned char *data, unsigned int size,
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unsigned long long *offset)
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{
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mm_segment_t oldfs;
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int ret;
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oldfs = get_fs();
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set_fs(get_ds());
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ret = vfs_read(file, data, size, offset);
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set_fs(oldfs);
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return ret;
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}
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/** FILE_Write
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* Write data from a file.
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*
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* @param file Opened file handle
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* @param offset Pointer to begin offset to Write.
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* @param data user's buffer address.
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* @param size Writedata length in bytes.
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* @retval >0 SUCCESS, return actual bytes Write.
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* @retval <0 Fail, errno
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*/
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int FILE_Write(struct file *file, unsigned char *data, unsigned int size,
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unsigned long long *offset)
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{
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mm_segment_t oldfs;
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int ret;
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oldfs = get_fs();
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set_fs(get_ds());
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ret = vfs_write(file, data, size, offset);
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set_fs(oldfs);
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return ret;
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}
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/** FILE_ReadData
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* Read data from a file.
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*
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* @param path File path name to read.
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* @param u4Offset begin offset to read.
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* @param pData user's buffer address.
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* @param i4Length readdata length in bytes.
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* @retval >0 SUCCESS, return actual bytes read.
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* @retval <0 Fail, errno
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*/
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int FILE_ReadData(const char *path, unsigned int u4Offset, char *pData,
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int i4Length)
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{
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struct file *file = NULL;
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UINT64 u8Offset = (UINT64)u4Offset;
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file = FILE_Open(path, O_RDONLY, 0);
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if (!file)
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return -EFAULT;
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i4Length = FILE_Read(file, (void *)pData, i4Length, &u8Offset);
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filp_close(file, NULL);
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return i4Length;
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}
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/** FILE_WriteData
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* Write data to a file.
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*
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* @param path File path name to write.
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* @param u4Offset begin offset to write.
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* @param pData user's buffer address.
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* @param i4Length writedata length in bytes.
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* @retval >0 SUCCESS, return actual bytes writen.
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* @retval <0 Fail, errno
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*/
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int FILE_WriteData(const char *path, unsigned int u4Offset, char *pData,
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int i4Length)
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{
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struct file *file = NULL;
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UINT64 u8Offset = (UINT64)u4Offset;
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file = FILE_Open(path, O_WRONLY|O_CREAT, 0644);
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if (!file)
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return -EFAULT;
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i4Length = FILE_Write(file, (void *)pData, i4Length, &u8Offset);
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filp_close(file, NULL);
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return i4Length;
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}
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