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/* This file contains miscellaneous file system call handlers.
*
* The entry points into this file are:
* do_statvfs perform the STATVFS file system call
*
* Created:
* April 2009 (D.C. van Moolenbroek)
*/
#include "inc.h"
#include <sys/statvfs.h>
/*===========================================================================*
* do_statvfs *
*===========================================================================*/
int do_statvfs(struct statvfs *st)
{
/* Retrieve file system statistics.
*/
struct inode *ino;
char path[PATH_MAX];
u64_t bfree, btotal;
int r;
/* Unfortunately, we cannot be any more specific than this, because we are
* not given an inode number. Statistics of individual shared folders can
* only be obtained by making sure that the root of the file system is an
* actual share, and not a list of available shares.
*/
if ((ino = find_inode(ROOT_INODE_NR)) == NULL)
return EINVAL;
if ((r = verify_inode(ino, path, NULL)) != OK)
return r;
if ((r = sffs_table->t_queryvol(path, &bfree, &btotal)) != OK)
return r;
/* Returning zero for unknown values seems to be the convention. However, we
* do have to use a nonzero block size, even though it is entirely arbitrary.
*/
st->f_flag = ST_NOTRUNC;
st->f_bsize = BLOCK_SIZE;
st->f_frsize = BLOCK_SIZE;
st->f_iosize = BLOCK_SIZE;
st->f_blocks = (fsblkcnt_t)(btotal / BLOCK_SIZE);
st->f_bfree = (fsblkcnt_t)(bfree / BLOCK_SIZE);
st->f_bavail = st->f_bfree;
st->f_namemax = NAME_MAX;
return OK;
}
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