80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/* This file contains miscellaneous file system call handlers.
|
|
*
|
|
* The entry points into this file are:
|
|
* do_fstatfs perform the FSTATFS file system call
|
|
* do_statvfs perform the STATVFS file system call
|
|
*
|
|
* Created:
|
|
* April 2009 (D.C. van Moolenbroek)
|
|
*/
|
|
|
|
#include "inc.h"
|
|
|
|
#include <sys/statfs.h>
|
|
#include <sys/statvfs.h>
|
|
|
|
/*===========================================================================*
|
|
* do_fstatfs *
|
|
*===========================================================================*/
|
|
PUBLIC int do_fstatfs()
|
|
{
|
|
/* Retrieve file system statistics.
|
|
*/
|
|
struct statfs statfs;
|
|
|
|
statfs.f_bsize = BLOCK_SIZE; /* arbitrary block size constant */
|
|
|
|
return sys_safecopyto(m_in.m_source, m_in.REQ_GRANT, 0,
|
|
(vir_bytes) &statfs, sizeof(statfs), D);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* do_statvfs *
|
|
*===========================================================================*/
|
|
PUBLIC int do_statvfs()
|
|
{
|
|
/* Retrieve file system statistics.
|
|
*/
|
|
struct statvfs statvfs;
|
|
struct inode *ino;
|
|
char path[PATH_MAX];
|
|
u64_t free, total;
|
|
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 using the "prefix=" option when mounting.
|
|
*/
|
|
if ((ino = find_inode(ROOT_INODE_NR)) == NULL)
|
|
return EINVAL;
|
|
|
|
if ((r = verify_inode(ino, path, NULL)) != OK)
|
|
return r;
|
|
|
|
/* It appears that this call always fails with EACCES ("permission denied")
|
|
* on read-only folders. As far as I can tell, this is a VMware bug.
|
|
*/
|
|
if ((r = hgfs_queryvol(path, &free, &total)) != OK)
|
|
return r;
|
|
|
|
memset(&statvfs, 0, sizeof(statvfs));
|
|
|
|
/* 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.
|
|
*/
|
|
statvfs.f_bsize = BLOCK_SIZE;
|
|
statvfs.f_frsize = BLOCK_SIZE;
|
|
statvfs.f_blocks = div64u(total, BLOCK_SIZE);
|
|
statvfs.f_bfree = div64u(free, BLOCK_SIZE);
|
|
statvfs.f_bavail = statvfs.f_bfree;
|
|
statvfs.f_files = 0;
|
|
statvfs.f_ffree = 0;
|
|
statvfs.f_favail = 0;
|
|
statvfs.f_fsid = state.dev;
|
|
statvfs.f_flag = state.read_only ? ST_RDONLY : 0;
|
|
statvfs.f_namemax = NAME_MAX;
|
|
|
|
return sys_safecopyto(m_in.m_source, m_in.REQ_GRANT, 0,
|
|
(vir_bytes) &statvfs, sizeof(statvfs), D);
|
|
}
|