/* Copyright (C) 1998 Joshua Sled

   This file is part of LibGTop 1.0.

   Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 1998.

   LibGTop is free software; you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License,

   or (at your option) any later version.

   LibGTop is distributed in the hope that it will be useful, but WITHOUT

   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

   for more details.

   You should have received a copy of the GNU General Public License

   along with LibGTop; see the file COPYING. If not, write to the

   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

   Boston, MA 02110-1301, USA.

*/

#include <config.h>

#include <glibtop.h>

#include <glibtop/error.h>

#include <glibtop/procmap.h>

#include <glibtop_suid.h>

#include <kvm.h>

#include <sys/param.h>

#include <sys/proc.h>

#include <sys/resource.h>

#if defined(__NetBSD__) && (__NetBSD_Version__ < 105020000)

#include <vm/vm_object.h>

#include <vm/vm_prot.h>

#include <vm/vm_map.h>

#elif defined(__NetBSD__) && (__NetBSD_Version__ >= 105020000)

#include <uvm/uvm_extern.h>

#else

#include <vm/vm_object.h>

#include <vm/vm_map.h>

#if (__FreeBSD_version >= 400011) || defined(__FreeBSD_kernel__)

#include <vm/vm.h>

#else

#include <vm/vm_prot.h>

#endif

#endif

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)

#define _KVM_VNODE

#endif

#include <sys/vnode.h>

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)

#undef _KVM_VNODE

#endif

#include <sys/mount.h>

#include <ufs/ufs/quota.h>

#include <ufs/ufs/inode.h>

#include <sys/ucred.h>

#if (!defined __OpenBSD__) && (!defined __bsdi__)

#include <sys/user.h>

#endif

#include <sys/sysctl.h>

#if !defined(__NetBSD__) || (__NetBSD_Version__ < 105020000)

#include <vm/vm.h>

#endif

#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000)

/* Fixme ... */

#undef _KERNEL

#define _UVM_UVM_AMAP_I_H_ 1

#define _UVM_UVM_MAP_I_H_ 1

#include <uvm/uvm.h>

#endif

static const unsigned long _glibtop_sysdeps_proc_map =

(1L << GLIBTOP_PROC_MAP_TOTAL) + (1L << GLIBTOP_PROC_MAP_NUMBER) +

(1L << GLIBTOP_PROC_MAP_SIZE);

static const unsigned long _glibtop_sysdeps_map_entry =

(1L << GLIBTOP_MAP_ENTRY_START) + (1L << GLIBTOP_MAP_ENTRY_END) +

(1L << GLIBTOP_MAP_ENTRY_OFFSET) + (1L << GLIBTOP_MAP_ENTRY_PERM) +

(1L << GLIBTOP_MAP_ENTRY_INODE) + (1L << GLIBTOP_MAP_ENTRY_DEVICE);

/* Init function. */

void

_glibtop_init_proc_map_p (glibtop *server)

{

	server->sysdeps.proc_map = _glibtop_sysdeps_proc_map;

}

/* Provides detailed information about a process. */

glibtop_map_entry *

glibtop_get_proc_map_p (glibtop *server, glibtop_proc_map *buf,

			pid_t pid)

{

	struct kinfo_proc *pinfo;

	struct vm_map_entry entry, *first;

	struct vmspace vmspace;

#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000)

	struct vnode vnode;

	struct inode inode;

#else

	struct vm_object object;

#endif

	GArray *maps = g_array_sized_new(FALSE, FALSE,

					 sizeof(glibtop_map_entry),

					 100);

#if (defined __FreeBSD__) || defined(__FreeBSD_kernel__)

	struct vnode vnode;

#if (__FreeBSD_version < 500039) && !defined(__FreeBSD_kernel__)

	struct inode inode;

#endif

#endif

	int count, i = 0;

	int update = 0;

	glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_PROC_MAP), 0);

	memset (buf, 0, sizeof (glibtop_proc_map));

	/* It does not work for the swapper task. */

	if (pid == 0) return (glibtop_map_entry*) g_array_free(maps, TRUE);

	glibtop_suid_enter (server);

	/* Get the process data */

	pinfo = kvm_getprocs (server->machine->kd, KERN_PROC_PID, pid, &count);

	if ((pinfo == NULL) || (count < 1)) {

		glibtop_warn_io_r (server, "kvm_getprocs (%d)", pid);

		return (glibtop_map_entry*) g_array_free(maps, TRUE);

	}

	/* Now we get the memory maps. */

	if (kvm_read (server->machine->kd,

#if (defined(__FreeBSD__) && (__FreeBSD_version >= 500013)) || defined(__FreeBSD_kernel__)

		      (unsigned long) pinfo [0].ki_vmspace,

#else

		      (unsigned long) pinfo [0].kp_proc.p_vmspace,

#endif

		      (char *) &vmspace, sizeof (vmspace)) != sizeof (vmspace))

		glibtop_error_io_r (server, "kvm_read (vmspace)");

	first = vmspace.vm_map.header.next;

	if (kvm_read (server->machine->kd,

		      (unsigned long) vmspace.vm_map.header.next,

		      (char *) &entry, sizeof (entry)) != sizeof (entry))

		glibtop_error_io_r (server, "kvm_read (entry)");

	/* Allocate space. */

	buf->number = vmspace.vm_map.nentries;

	buf->size = sizeof (glibtop_map_entry);

	buf->total = buf->number * buf->size;

	buf->flags = _glibtop_sysdeps_proc_map;

	/* Walk through the `vm_map_entry' list ... */

	/* I tested this a few times with `mmap'; as soon as you write

	 * to the mmap'ed area, the object type changes from OBJT_VNODE

	 * to OBJT_DEFAULT so if seems this really works. */

	do {

		glibtop_map_entry *mentry;

		unsigned long inum, dev;

		guint len;

		if (update) {

			if (kvm_read (server->machine->kd,

				      (unsigned long) entry.next,

				      &entry, sizeof (entry)) != sizeof (entry))

				glibtop_error_io_r (server, "kvm_read (entry)");

		} else {

			update = 1;

		}

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)

#if (__FreeBSD__ >= 4) || defined(__FreeBSD_kernel__)

		if (entry.eflags & (MAP_ENTRY_IS_SUB_MAP))

			continue;

#else

 		if (entry.eflags & (MAP_ENTRY_IS_A_MAP|MAP_ENTRY_IS_SUB_MAP))

 			continue;

#endif

#else

#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000)

 		if (UVM_ET_ISSUBMAP (&entry))

			continue;

#else

		if (entry.is_a_map || entry.is_sub_map)

			continue;

#endif

#endif

#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000)

		if (!entry.object.uvm_obj)

			continue;

		/* We're only interested in vnodes */

		if (kvm_read (server->machine->kd,

			      (unsigned long) entry.object.uvm_obj,

			      &vnode, sizeof (vnode)) != sizeof (vnode)) {

			glibtop_warn_io_r (server, "kvm_read (vnode)");

			return (glibtop_map_entry*) g_array_free(maps, TRUE);

		}

#else

		if (!entry.object.vm_object)

			continue;

		/* We're only interested in `vm_object's */

		if (kvm_read (server->machine->kd,

			      (unsigned long) entry.object.vm_object,

			      &object, sizeof (object)) != sizeof (object))

			glibtop_error_io_r (server, "kvm_read (object)");

#endif

#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000)

#if defined(UVM_VNODE_VALID)

		if (!vnode.v_uvm.u_flags & UVM_VNODE_VALID)

			continue;

#endif

		if ((vnode.v_type != VREG) || (vnode.v_tag != VT_UFS) ||

		    !vnode.v_data) continue;

		if (kvm_read (server->machine->kd,

			      (unsigned long) vnode.v_data,

			      &inode, sizeof (inode)) != sizeof (inode))

			glibtop_error_io_r (server, "kvm_read (inode)");

		inum  = inode.i_number;

		dev = inode.i_dev;

#endif

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)

		/* If the object is of type vnode, add its size */

		if (object.type != OBJT_VNODE)

			continue;

		if (!object.handle)

			continue;

		if (kvm_read (server->machine->kd,

			      (unsigned long) object.handle,

			      &vnode, sizeof (vnode)) != sizeof (vnode))

			glibtop_error_io_r (server, "kvm_read (vnode)");

#if (defined(__FreeBSD__) && (__FreeBSD_version >= 500039)) || defined(__FreeBSD_kernel__)

               switch (vnode.v_type) {

                   case VREG:

#if (__FreeBSD_version < 600006) && !defined(__FreeBSD_kernel__)

                       inum = vnode.v_cachedid;

		       dev = vnode.v_cachedfs;

#endif

                   default:

                   continue;

               }

#else

		if ((vnode.v_type != VREG) || (vnode.v_tag != VT_UFS) ||

		    !vnode.v_data) continue;

		if (kvm_read (server->machine->kd,

			      (unsigned long) vnode.v_data,

			      &inode, sizeof (inode)) != sizeof (inode))

			glibtop_error_io_r (server, "kvm_read (inode)");

		inum  = inode.i_number;

		dev = inode.i_dev;

#endif

#endif

		len = maps->len;

		g_array_set_size(maps, len + 1);

		mentry = &g_array_index(maps, glibtop_map_entry, len);

		mentry->flags  = _glibtop_sysdeps_map_entry;

		mentry->start  = (guint64) entry.start;

		mentry->end    = (guint64) entry.end;

		mentry->offset = (guint64) entry.offset;

		mentry->device = (guint64) dev;

		mentry->inode  = (guint64) inum;

		mentry->perm   = (guint64) 0;

		if (entry.protection & VM_PROT_READ)

			mentry->perm |= GLIBTOP_MAP_PERM_READ;

		if (entry.protection & VM_PROT_WRITE)

			mentry->perm |= GLIBTOP_MAP_PERM_WRITE;

		if (entry.protection & VM_PROT_EXECUTE)

			mentry->perm |= GLIBTOP_MAP_PERM_EXECUTE;

	} while (entry.next != first);

	buf->flags = _glibtop_sysdeps_proc_map;

	buf->number = maps->len;

	buf->size = sizeof (glibtop_map_entry);

	buf->total = buf->number * buf->size;

	return (glibtop_map_entry*) g_array_free(maps, FALSE);

}