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-(* '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 =
- (* 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