1 (* 'df' command for virtual domains.
2 (C) Copyright 2007-2008 Richard W.M. Jones, Red Hat Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 open Virt_df_gettext.Gettext
26 let debug = true (* If true emit lots of debugging information. *)
28 let ( +* ) = Int32.add
29 let ( -* ) = Int32.sub
30 let ( ** ) = Int32.mul
31 let ( /* ) = Int32.div
33 let ( +^ ) = Int64.add
34 let ( -^ ) = Int64.sub
35 let ( *^ ) = Int64.mul
36 let ( /^ ) = Int64.div
39 let inodes = ref false
42 let test_files = ref []
44 class virtual device =
46 method virtual read : int64 -> int -> string
47 method virtual size : int64
48 method virtual name : string
50 (* Helper method to read a chunk of data into a bitstring. *)
51 method read_bitstring offset len =
52 let str = self#read offset len in
56 (* A concrete device which just direct-maps a file or /dev device. *)
57 class block_device filename =
58 let fd = openfile filename [ O_RDONLY ] 0 in
59 let size = (LargeFile.fstat fd).LargeFile.st_size in
62 method read offset len =
63 ignore (LargeFile.lseek fd offset SEEK_SET);
64 let str = String.make len '\000' in
68 method name = filename
71 (* The null device. Any attempt to read generates an error. *)
72 let null_device : device =
75 method read _ _ = assert false
81 dom_name : string; (* Domain name. *)
82 dom_id : int option; (* Domain ID (if running). *)
83 dom_disks : disk list; (* Domain disks. *)
84 dom_lv_filesystems : filesystem list; (* Domain LV filesystems. *)
87 (* From the XML ... *)
88 d_type : string option; (* The <disk type=...> *)
89 d_device : string; (* The <disk device=...> (eg "disk") *)
90 d_source : string; (* The <source file=... or dev> *)
91 d_target : string; (* The <target dev=...> (eg "hda") *)
93 (* About the device itself. *)
94 d_dev : device; (* Disk device. *)
95 d_content : disk_content; (* What's on it. *)
98 [ `Unknown (* Not probed or unknown. *)
99 | `Partitions of partitions (* Contains partitions. *)
100 | `Filesystem of filesystem (* Contains a filesystem directly. *)
101 | `PhysicalVolume of string (* Contains an LVM PV. *)
107 parts_name : string; (* Name of partitioning scheme. *)
108 parts : partition list (* Partitions. *)
111 part_status : partition_status; (* Bootable, etc. *)
112 part_type : int; (* Partition filesystem type. *)
113 part_dev : device; (* Partition device. *)
114 part_content : partition_content; (* What's on it. *)
116 and partition_status = Bootable | Nonbootable | Malformed | NullEntry
117 and partition_content =
118 [ `Unknown (* Not probed or unknown. *)
119 | `Filesystem of filesystem (* Filesystem. *)
120 | `PhysicalVolume of string (* Contains an LVM PV. *)
123 (* Filesystems (also swap devices). *)
125 fs_name : string; (* Name of filesystem. *)
126 fs_block_size : int64; (* Block size (bytes). *)
127 fs_blocks_total : int64; (* Total blocks. *)
128 fs_is_swap : bool; (* If swap, following not valid. *)
129 fs_blocks_reserved : int64; (* Blocks reserved for super-user. *)
130 fs_blocks_avail : int64; (* Blocks free (available). *)
131 fs_blocks_used : int64; (* Blocks in use. *)
132 fs_inodes_total : int64; (* Total inodes. *)
133 fs_inodes_reserved : int64; (* Inodes reserved for super-user. *)
134 fs_inodes_avail : int64; (* Inodes free (available). *)
135 fs_inodes_used : int64; (* Inodes in use. *)
138 (* Convert partition, filesystem types to printable strings for debugging. *)
139 let string_of_partition
140 { part_status = status; part_type = typ; part_dev = dev } =
141 sprintf "%s: %s partition type %d"
144 | Bootable -> "bootable"
145 | Nonbootable -> "nonbootable"
146 | Malformed -> "malformed"
147 | NullEntry -> "empty")
150 let string_of_filesystem { fs_name = name; fs_is_swap = swap } =
151 if not swap then name
152 else name ^ " [swap]"
154 (* Register a partition scheme. *)
155 let partition_types = ref []
156 let partition_type_register (parts_name : string) probe_fn =
157 partition_types := (parts_name, probe_fn) :: !partition_types
159 (* Probe a device for partitions. Returns [Some parts] or [None]. *)
160 let probe_for_partitions dev =
161 if debug then eprintf "probing for partitions on %s ...\n%!" dev#name;
162 let rec loop = function
164 | (parts_name, probe_fn) :: rest ->
165 try Some (probe_fn dev)
166 with Not_found -> loop rest
168 let r = loop !partition_types in
171 | None -> eprintf "no partitions found on %s\n%!" dev#name
172 | Some { parts_name = name; parts = parts } ->
173 eprintf "found %d %s partitions on %s:\n"
174 (List.length parts) name dev#name;
175 List.iter (fun p -> eprintf "\t%s\n%!" (string_of_partition p)) parts
179 (* Register a filesystem type (or swap). *)
180 let filesystem_types = ref []
181 let filesystem_type_register (fs_name : string) probe_fn =
182 filesystem_types := (fs_name, probe_fn) :: !filesystem_types
184 (* Probe a device for a filesystem. Returns [Some fs] or [None]. *)
185 let probe_for_filesystem dev =
186 if debug then eprintf "probing for a filesystem on %s ...\n%!" dev#name;
187 let rec loop = function
189 | (fs_name, probe_fn) :: rest ->
190 try Some (probe_fn dev)
191 with Not_found -> loop rest
193 let r = loop !filesystem_types in
196 | None -> eprintf "no filesystem found on %s\n%!" dev#name
198 eprintf "found a filesystem on %s:\n" dev#name;
199 eprintf "\t%s\n%!" (string_of_filesystem fs)
203 (* Register a volume management type. *)
204 let lvm_types = ref []
205 let lvm_type_register (lvm_name : string) probe_fn list_lvs_fn =
206 lvm_types := (lvm_name, (probe_fn, list_lvs_fn)) :: !lvm_types
208 (* Probe a device for a PV. Returns [Some lvm_name] or [None]. *)
209 let probe_for_pv dev =
210 if debug then eprintf "probing if %s is a PV ...\n%!" dev#name;
211 let rec loop = function
213 | (lvm_name, (probe_fn, _)) :: rest ->
214 if probe_fn dev then Some lvm_name else loop rest
216 let r = loop !lvm_types in
219 | None -> eprintf "no PV found on %s\n%!" dev#name
221 eprintf "%s contains a %s PV\n%!" dev#name lvm_name
225 let list_lvs lvm_name devs =
226 let _, list_lvs_fn = List.assoc lvm_name !lvm_types in
229 (*----------------------------------------------------------------------*)
231 (* This version by Isaac Trotts. *)
232 let group_by ?(cmp = Pervasives.compare) ls =
235 (fun acc (day1, x1) ->
238 | (day2, ls2) :: acctl ->
240 then (day1, x1 :: ls2) :: acctl
241 else (day1, [x1]) :: acc)
245 let ls' = List.rev ls' in
246 List.map (fun (x, xs) -> x, List.rev xs) ls'