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Diffstat (limited to 'lib/libprocstat/common_kvm.c')
| -rw-r--r-- | lib/libprocstat/common_kvm.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/lib/libprocstat/common_kvm.c b/lib/libprocstat/common_kvm.c new file mode 100644 index 0000000..1ff181c --- /dev/null +++ b/lib/libprocstat/common_kvm.c @@ -0,0 +1,207 @@ +/*- + * 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_namebuf, 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 = (long)inode.i_number; + vn->vn_mode = (mode_t)inode.i_mode; + vn->vn_size = (u_long)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); +} |
