blob: ad561498bde3a7b9acc2da35c2361fb5852c2eb6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
(* 'df' command for virtual domains.
(C) Copyright 2007 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.
Support for Linux swap partitions.
*)
open Virt_df_gettext.Gettext
open Virt_df
let probe_swap (dev : device) =
(* Load the "superblock" (ie. first 0x1000 bytes). *)
let bits = dev#read_bitstring 0L 0x1000 in
bitmatch bits with
(* Actually this isn't just padding. *)
| padding : 8*0x1000 - 10*8 : bitstring;
magic : 10*8 : bitstring
when Bitmatch.string_of_bitstring magic = "SWAPSPACE2" ->
{
fs_name = s_ "Linux swap";
fs_block_size = 4096L; (* XXX *)
fs_blocks_total = dev#size /^ 4096L;
(* The remaining fields are ignored when fs_is_swap is true. *)
fs_is_swap = true;
fs_blocks_reserved = 0L;
fs_blocks_avail = 0L;
fs_blocks_used = 0L;
fs_inodes_total = 0L;
fs_inodes_reserved = 0L;
fs_inodes_avail = 0L;
fs_inodes_used = 0L;
}
| _ ->
raise Not_found (* Not Linux swapspace. *)
(* Register with main code. *)
let () = filesystem_type_register "linux_swap" probe_swap
|
