-(* Memory info command for virtual domains.
- (C) Copyright 2008 Richard W.M. Jones, Red Hat Inc.
- http://libvirt.org/
-
- This program 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.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *)
-
-open Printf
-
-open Virt_mem_gettext.Gettext
-open Virt_mem_utils
-open Virt_mem_types
-
-(*
-open Kernel_net_device
-open Kernel_net
-
-let max_net_devices = 10000
-
-let rec find_net_devices debug image ksymmap kernel_version =
- if not (net_device_known kernel_version) then (
- eprintf (f_"%s: %s: unknown kernel version
-Try a newer version of virt-mem, or if the guest is not from a
-supported Linux distribution, see this page about adding support:
- http://et.redhat.com/~rjones/virt-mem/faq.html\n")
- image.domname kernel_version;
- image, None
- ) else (
- (* In kernels < ~ 2.6.22, this is a simple linked list:
- * dev_base -> next -> next
- * In kernels >= 2.6.23, this is a list_head:
- * dev_base_head -> list_head dev_list -> ...
- *)
- let map =
- let { field_available = available } =
- field_signature_of_net_device_next kernel_version in
- if available then
- Some map_next
- else (
- let { field_available = available } =
- field_signature_of_net_device_dev_list'next kernel_version in
- if available then
- Some map_dev_list
- else (
- eprintf (f_"%s: kernel net_device table is not linked through either next pointer or dev_list list_head. Cannot read net devices.\n") image.domname;
- None
- )
- ) in
-
- match map with
- | None -> image, None
-
- | Some map ->
- (* What is the starting point for iteration? In older kernels
- * it was the symbol 'dev_base'. Then briefly (2.6.22-2.6.24)
- * it became 'struct list_head dev_base_head'. Then when net
- * namespaces were introduced (>= 2.6.25) it became 'struct
- * list_head init_net.dev_base_head'.
- *)
- let addr =
- try Some (Ksymmap.find "dev_base" ksymmap)
- with Not_found ->
- try
- let addr = Ksymmap.find "dev_base_head" ksymmap in
- Some addr
- with Not_found ->
- try
- let addr = Ksymmap.find "init_net" ksymmap in
- if not (net_known kernel_version) then (
- eprintf (f_"%s: struct net not available in this kernel version.\n") image.domname;
- raise Not_found
- );
- let { field_offset = offset } =
- field_signature_of_net_dev_base_head'next kernel_version in
- let addr = addr +^ Int64.of_int offset in
- Some addr
- with Not_found ->
- eprintf (f_"%s: cannot find dev_base, dev_base_head or init_net symbols in kernel image.\n") image.domname;
- None in
-
- match addr with
- | None -> image, None
-
- | Some addr ->
- (* Map over the structure using previously defined map function. *)
- let image, netdevs =
- map kernel_version image addr (
- fun netdev ->
- { netdev_name = truncate_c_string netdev.net_device_name;
- netdev_flags = netdev.net_device_flags;
- netdev_operstate = netdev.net_device_operstate;
- netdev_mtu = netdev.net_device_mtu;
- netdev_perm_addr = netdev.net_device_perm_addr;
- netdev_addr_len = netdev.net_device_addr_len;
- }
- ) in
-
- image, Some netdevs
- )
-
-(* Map dev_base_head -> list_head dev_list -> ... *)
-and map_dev_list kernel_version image lh_addr f =
- let { field_offset = offset } =
- field_signature_of_net_device_dev_list'next kernel_version in
- let lh = Virt_mem_list_head.create image lh_addr offset in
-
- let size = net_device_size kernel_version in
- let image, lh = Virt_mem_list_head.load_all lh size in
-
- let net_devices, _ =
- Virt_mem_list_head.fold lh ([], 0) (
- fun (net_devices, i) addr ->
- if i > max_net_devices then
- failwith (sprintf (f_"%s: too many network devices") image.domname);
-
- let net_device = get_net_device kernel_version image.mem addr in
- let net_devices = f net_device :: net_devices in
- (net_devices, i+1)
- ) in
-
- image, net_devices
-
-(* Iterate dev_base -> next -> next ... *)
-and map_next kernel_version image addr f =
- let size = net_device_size kernel_version in
-
- let rec loop i image acc addr =
- if i <= max_net_devices then (
- if addr <> 0L then (
- let mapped = Virt_mem_mmap.is_mapped_range image.mem addr size in
- let image =
- if not mapped then
- Virt_mem_types.load_memory image addr size
- else
- image in
- let dev = get_net_device kernel_version image.mem addr in
- let acc = f dev :: acc in
- let addr =
- match dev.net_device_next with
- | None -> assert false | Some addr -> addr in
- loop (i+1) image acc addr
- ) else
- image, acc
- ) else
- failwith (sprintf (f_"%s: too many network devices") image.domname);
- in
- loop 0 image [] addr
-*)
git.annexia.org / virt-mem.git / blobdiff