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fs/vfs: Implement statvfs and fstatvfs

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specified here:
https://pubs.opengroup.org/onlinepubs/009695399/basedefs/sys/statvfs.h.html

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2020-07-10 22:27:06 +08:00 committed by Abdelatif Guettouche
parent d32e9c38df
commit 6f6d61eec4
5 changed files with 236 additions and 1 deletions
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84
include/sys/statvfs.h Normal file
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@ -0,0 +1,84 @@
/****************************************************************************
* include/sys/statvfs.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_SYS_STATVFS_H
#define __INCLUDE_SYS_STATVFS_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Definitions for the flag in `f_flag'. These definitions should be
* kept in sync with the definitions in <sys/mount.h>.
*/
#define ST_RDONLY 0x0001 /* Mount read-only. */
#define ST_NOSUID 0x0002 /* Ignore suid and sgid bits. */
/****************************************************************************
* Type Definitions
****************************************************************************/
struct statvfs
{
unsigned long f_bsize; /* File system block size */
unsigned long f_frsize; /* Fundamental file system block size */
fsblkcnt_t f_blocks; /* Total number of blocks on file system in
* units of f_frsize */
fsblkcnt_t f_bfree; /* Total number of free blocks */
fsblkcnt_t f_bavail; /* Number of free blocks available to
* non-privileged process */
fsfilcnt_t f_files; /* Total number of file serial numbers */
fsfilcnt_t f_ffree; /* Total number of free file serial numbers */
fsfilcnt_t f_favail; /* Number of file serial numbers available to
* non-privileged process */
unsigned long f_fsid; /* File system ID */
unsigned long f_flag; /* Bit mask of f_flag values */
unsigned long f_namemax; /* Maximum filename length */
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
int statvfs(FAR const char *path, FAR struct statvfs *buf);
int fstatvfs(int fd, FAR struct statvfs *buf);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_SYS_STATVFS_H */

5
include/sys/types.h
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@ -202,6 +202,11 @@ typedef int wint_t;
typedef int wctype_t;
/* fsblkcnt_t and fsfilcnt_t shall be defined as unsigned integer types. */
typedef uint32_t fsblkcnt_t;
typedef uint32_t fsfilcnt_t;
/* blkcnt_t and off_t are signed integer types.
*
* blkcnt_t is used for file block counts.

2
libs/libc/unistd/Make.defs
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@ -37,7 +37,7 @@
CSRCS += lib_access.c lib_daemon.c lib_swab.c lib_pathconf.c lib_sysconf.c
CSRCS += lib_getopt.c lib_getoptargp.c lib_getoptindp.c lib_getoptoptp.c
CSRCS += lib_alarm.c lib_sleep.c lib_usleep.c
CSRCS += lib_alarm.c lib_fstatvfs.c lib_statvfs.c lib_sleep.c lib_usleep.c
CSRCS += lib_seteuid.c lib_setegid.c lib_geteuid.c lib_getegid.c
CSRCS += lib_setreuid.c lib_setregid.c
CSRCS += lib_getrusage.c

73
libs/libc/unistd/lib_fstatvfs.c Normal file
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/****************************************************************************
* libs/libc/unistd/lib_fstatvfs.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/statfs.h>
#include <sys/statvfs.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: fstatvfs
*
* Description:
* The fstatvfs() function shall obtain information about the file system
* containing the file referenced by fd.
*
* the buf argument is a pointer to a statvfs structure that shall be
* filled. Read, write, or execute permission of the named file is not
* required.
*
* Returned Value:
* Upon successful completion, statvfs() shall return 0. Otherwise, it
* shall return -1 and set errno to indicate the error.
*
****************************************************************************/
int fstatvfs(int fd, FAR struct statvfs *buf)
{
struct statfs tmp;
int ret;
ret = fstatfs(fd, &tmp);
if (ret < 0)
{
return ret;
}
buf->f_bsize = tmp.f_bsize;
buf->f_frsize = tmp.f_bsize;
buf->f_blocks = tmp.f_blocks;
buf->f_bfree = tmp.f_bfree;
buf->f_bavail = tmp.f_bavail;
buf->f_files = tmp.f_files;
buf->f_ffree = tmp.f_ffree;
buf->f_favail = tmp.f_ffree;
buf->f_fsid = 0;
buf->f_flag = 0;
buf->f_namemax = tmp.f_namelen;
return ret;
}

73
libs/libc/unistd/lib_statvfs.c Normal file
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@ -0,0 +1,73 @@
/****************************************************************************
* libs/libc/unistd/lib_statvfs.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/statfs.h>
#include <sys/statvfs.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: statvfs
*
* Description:
* The statvfs() function shall obtain information about the file system
* containing the file named by path.
*
* the buf argument is a pointer to a statvfs structure that shall be
* filled. Read, write, or execute permission of the named file is not
* required.
*
* Returned Value:
* Upon successful completion, statvfs() shall return 0. Otherwise, it
* shall return -1 and set errno to indicate the error.
*
****************************************************************************/
int statvfs(FAR const char *path, FAR struct statvfs *buf)
{
struct statfs tmp;
int ret;
ret = statfs(path, &tmp);
if (ret < 0)
{
return ret;
}
buf->f_bsize = tmp.f_bsize;
buf->f_frsize = tmp.f_bsize;
buf->f_blocks = tmp.f_blocks;
buf->f_bfree = tmp.f_bfree;
buf->f_bavail = tmp.f_bavail;
buf->f_files = tmp.f_files;
buf->f_ffree = tmp.f_ffree;
buf->f_favail = tmp.f_ffree;
buf->f_fsid = 0;
buf->f_flag = 0;
buf->f_namemax = tmp.f_namelen;
return ret;
}