- Commit work from libprocstat project. These patches add support for runtime

  file and processes information retrieval from the running kernel via sysctl
  in the form of new library, libprocstat.  The library also supports KVM backend
  for analyzing memory crash dumps.  Both procstat(1) and fstat(1) utilities have
  been modified to take advantage of the library (as the bonus point the fstat(1)
  utility no longer need superuser privileges to operate), and the procstat(1)
  utility is now able to display information from memory dumps as well.

  The newly introduced fuser(1) utility also uses this library and able to operate
  via sysctl and kvm backends.

  The library is by no means complete (e.g. KVM backend is missing vnode name
  resolution routines, and there're no manpages for the library itself) so I
  plan to improve it further.  I'm commiting it so it will get wider exposure
  and review.

  We won't be able to MFC this work as it relies on changes in HEAD, which
  was introduced some time ago, that break kernel ABI.  OTOH we may be able
  to merge the library with KVM backend if we really need it there.

Discussed with:	rwatson

1 files changed, 53 insertions, 0 deletions

diff --git a/lib/libprocstat/common_kvm.h b/lib/libprocstat/common_kvm.h
new file mode 100644
index 0000000..d0b5307
--- /dev/null
+++ b/lib/libprocstat/common_kvm.h
@@ -0,0 +1,53 @@
+/*-
+ * Copyright (c) 2009 Stanislav Sedov <stas@FreeBSD.org>
+ * 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.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_COMMON_KVM_H_
+#define	_COMMON_KVM_H_
+
+dev_t	dev2udev(kvm_t *kd, struct cdev *dev);
+int	kdevtoname(kvm_t *kd, struct cdev *dev, char *);
+int	kvm_read_all(kvm_t *kd, unsigned long addr, void *buf,
+    size_t nbytes);
+
+/*
+ * Filesystems specific access routines.
+ */
+int	devfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	isofs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	msdosfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	nfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	ntfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	nwfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	smbfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	udf_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	ufs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+int	zfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn);
+void	*getvnodedata(struct vnode *vp);
+struct mount	*getvnodemount(struct vnode *vp);
+
+#endif	/* _COMMON_KVM_H_ */