freebsd-dev/lib/libprocstat/common_kvm.c
Gleb Kurtsou e458cb776e Don't cast inode number or file size down to long or unsigned.
Since ino_t size is about to change to 64-bits, casts to long would
truncate 64-bit numbers on 32-bit archs.

Sponsored by:	Google Summer of Code 2011
2012-05-18 10:15:46 +00:00

208 lines
5.3 KiB
C

/*-
* Copyright (c) 2009 Stanislav Sedov <stas@FreeBSD.org>
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/user.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/conf.h>
#define _KERNEL
#include <sys/pipe.h>
#include <sys/mount.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <fs/devfs/devfs.h>
#include <fs/devfs/devfs_int.h>
#undef _KERNEL
#include <nfs/nfsproto.h>
#include <nfsclient/nfs.h>
#include <nfsclient/nfsnode.h>
#include <assert.h>
#include <err.h>
#include <kvm.h>
#include <stddef.h>
#include <string.h>
#include <libprocstat.h>
#include "common_kvm.h"
int
kvm_read_all(kvm_t *kd, unsigned long addr, void *buf, size_t nbytes)
{
ssize_t error;
if (nbytes >= SSIZE_MAX)
return (0);
error = kvm_read(kd, addr, buf, nbytes);
return (error == (ssize_t)(nbytes));
}
int
kdevtoname(kvm_t *kd, struct cdev *dev, char *buf)
{
struct cdev si;
assert(buf);
if (!kvm_read_all(kd, (unsigned long)dev, &si, sizeof(si)))
return (1);
strlcpy(buf, si.si_name, SPECNAMELEN + 1);
return (0);
}
int
ufs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
{
struct inode inode;
if (!kvm_read_all(kd, (unsigned long)VTOI(vp), &inode, sizeof(inode))) {
warnx("can't read inode at %p", (void *)VTOI(vp));
return (1);
}
/*
* The st_dev from stat(2) is a dev_t. These kernel structures
* contain cdev pointers. We need to convert to dev_t to make
* comparisons
*/
vn->vn_fsid = dev2udev(kd, inode.i_dev);
vn->vn_fileid = inode.i_number;
vn->vn_mode = (mode_t)inode.i_mode;
vn->vn_size = inode.i_size;
return (0);
}
int
devfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
{
struct devfs_dirent devfs_dirent;
struct mount mount;
if (!kvm_read_all(kd, (unsigned long)getvnodedata(vp), &devfs_dirent,
sizeof(devfs_dirent))) {
warnx("can't read devfs_dirent at %p",
(void *)vp->v_data);
return (1);
}
if (!kvm_read_all(kd, (unsigned long)getvnodemount(vp), &mount,
sizeof(mount))) {
warnx("can't read mount at %p",
(void *)getvnodemount(vp));
return (1);
}
vn->vn_fsid = mount.mnt_stat.f_fsid.val[0];
vn->vn_fileid = devfs_dirent.de_inode;
vn->vn_mode = (devfs_dirent.de_mode & ~S_IFMT) | S_IFCHR;
vn->vn_size = 0;
return (0);
}
int
nfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
{
struct nfsnode nfsnode;
mode_t mode;
if (!kvm_read_all(kd, (unsigned long)VTONFS(vp), &nfsnode,
sizeof(nfsnode))) {
warnx("can't read nfsnode at %p",
(void *)VTONFS(vp));
return (1);
}
vn->vn_fsid = nfsnode.n_vattr.va_fsid;
vn->vn_fileid = nfsnode.n_vattr.va_fileid;
vn->vn_size = nfsnode.n_size;
mode = (mode_t)nfsnode.n_vattr.va_mode;
switch (vp->v_type) {
case VREG:
mode |= S_IFREG;
break;
case VDIR:
mode |= S_IFDIR;
break;
case VBLK:
mode |= S_IFBLK;
break;
case VCHR:
mode |= S_IFCHR;
break;
case VLNK:
mode |= S_IFLNK;
break;
case VSOCK:
mode |= S_IFSOCK;
break;
case VFIFO:
mode |= S_IFIFO;
break;
default:
break;
};
vn->vn_mode = mode;
return (0);
}
/*
* Read the cdev structure in the kernel in order to work out the
* associated dev_t
*/
dev_t
dev2udev(kvm_t *kd, struct cdev *dev)
{
struct cdev_priv priv;
assert(kd);
if (kvm_read_all(kd, (unsigned long)cdev2priv(dev), &priv,
sizeof(priv))) {
return ((dev_t)priv.cdp_inode);
} else {
warnx("can't convert cdev *%p to a dev_t\n", dev);
return (-1);
}
}
void *
getvnodedata(struct vnode *vp)
{
return (vp->v_data);
}
struct mount *
getvnodemount(struct vnode *vp)
{
return (vp->v_mount);
}