154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "vfs_config.h"
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#include "sys/statfs.h"
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#include "string.h"
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#include "sched.h"
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#include "errno.h"
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#include "stdlib.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: statpseudo
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****************************************************************************/
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#ifdef LOSCFG_FS_FAT_VIRTUAL_PARTITION
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int virstatfs(const char *path, struct statfs *buf)
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{
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#ifdef VFS_IMPL_LATER
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struct inode *inode = NULL;
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int ret = OK;
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char *fullpath = NULL;
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struct inode_search_s desc;
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/* Sanity checks */
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if (!path || !buf)
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{
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ret = EFAULT;
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goto errout;
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}
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if (!path[0])
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{
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ret = ENOENT;
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goto errout;
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}
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ret = vfs_normalize_path((const char *)NULL, path, &fullpath);
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if (ret < 0)
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{
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ret = -ret;
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goto errout;
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}
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/* Get an inode for this file */
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SETUP_SEARCH(&desc, fullpath, false);
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ret = inode_find(&desc);
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if (ret < 0)
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{
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/* This name does not refer to a psudeo-inode and there is no
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* mountpoint that includes in this path.
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*/
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ret = EACCES;
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free(fullpath);
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goto errout;
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}
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inode = desc.node;
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/* The way we handle the statfs depends on the type of inode that we
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* are dealing with.
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*/
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#ifndef CONFIG_DISABLE_MOUNTPOINT
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if (INODE_IS_MOUNTPT(inode))
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{
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/* The node is a file system mointpoint. Verify that the mountpoint
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* supports the statfs() method
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*/
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if (inode->u.i_mops)
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{
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/* Perform the statfs() operation */
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ret = LOS_OK;
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}
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else
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{
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ret = EINVAL;
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goto errout_with_inode;
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}
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}
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else
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#endif
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{
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ret = EINVAL;
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goto errout_with_inode;
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}
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/* Check if the statfs operation was successful */
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if (ret < 0)
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{
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ret = -ret;
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goto errout_with_inode;
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}
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/* Successfully statfs'ed the file */
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inode_release(inode);
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free(fullpath);
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return OK;
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/* Failure conditions always set the errno appropriately */
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errout_with_inode:
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inode_release(inode);
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free(fullpath);
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errout:
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set_errno(ret);
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return VFS_ERROR;
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#endif
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return 0;
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}
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#endif
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