X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=virt-df%2Fvirt_df.ml;h=b97283791ed8fe563ad077fccf4b7af796ce65a2;hb=fabdbe4e169e123774ab1bf665cdf4a4e9536296;hp=d651fa30629b8d8163f5b4305c0ef1db2aea349a;hpb=f1f314e84bd2daef18b983eb1c2e10a7614c57bb;p=virt-top.git diff --git a/virt-df/virt_df.ml b/virt-df/virt_df.ml index d651fa3..b972837 100644 --- a/virt-df/virt_df.ml +++ b/virt-df/virt_df.ml @@ -1,179 +1,659 @@ (* 'df' command for virtual domains. - * $Id$ + (C) Copyright 2007-2008 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 ExtList +open Unix + +open Virt_df_gettext.Gettext module C = Libvirt.Connect module D = Libvirt.Domain -module N = Libvirt.Network -let uri = ref None +(* If set to true, then emit lots of debugging information. *) +let debug = true -let () = - (* Command line argument parsing. *) - let set_uri = function "" -> uri := None | u -> uri := Some u in +(* Int32 infix operators for convenience. *) +let ( +* ) = Int32.add +let ( -* ) = Int32.sub +let ( ** ) = Int32.mul +let ( /* ) = Int32.div - let argspec = Arg.align [ - "-c", Arg.String set_uri, "uri Connect to URI (default: Xen)"; - "--connect", Arg.String set_uri, "uri Connect to URI (default: Xen)"; - ] in +(* Int64 infix operators for convenience. *) +let ( +^ ) = Int64.add +let ( -^ ) = Int64.sub +let ( *^ ) = Int64.mul +let ( /^ ) = Int64.div - let anon_fun str = raise (Arg.Bad (str ^ ": unknown parameter")) in - let usage_msg = "virt-df : like 'df', shows disk space used in guests +(* State of command line arguments. *) +let uri = ref None (* Hypervisor/libvirt URI. *) +let inodes = ref false (* Display inodes. *) +let human = ref false (* Display human-readable. *) +let all = ref false (* Show all/active domains. *) +let test_files = ref [] (* Used for test mode only. *) -SUMMARY - virt-df [-options] +(*----------------------------------------------------------------------*) +(* The "domain/device model" that we currently understand looks + * like this: + * + * domains + * | + * \--- host partitions / disk image files + * || + * guest block devices + * | + * +--> guest partitions (eg. using MBR) + * | | + * \-(1)->+--- filesystems (eg. ext3) + * | + * \--- PVs for LVM + * ||| + * VGs and LVs + * + * (1) Filesystems and PVs may also appear directly on guest + * block devices. + * + * Partition schemes (eg. MBR) and filesystems register themselves + * with this main module and they are queried first to get an idea + * of the physical devices, partitions and filesystems potentially + * available to the guest. + * + * Volume management schemes (eg. LVM) register themselves here + * and are called later with "spare" physical devices and partitions + * to see if they contain LVM data. If this results in additional + * logical volumes then these are checked for filesystems. + * + * Swap space is considered to be a dumb filesystem for the purposes + * of this discussion. + *) -OPTIONS" in +(* A virtual (or physical!) device, encapsulating any translation + * that has to be done to access the device. eg. For partitions + * there is a simple offset, but for LVM you may need complicated + * table lookups. + * + * We keep the underlying file descriptors open for the duration + * of the program. There aren't likely to be many of them, and + * the program is short-lived, and it's easier than trying to + * track which device is using what fd. As a result, there is no + * need for any close/deallocation function. + * + * Note the very rare use of OOP in OCaml! + *) +class virtual device = +object (self) + method virtual read : int64 -> int -> string + method virtual size : int64 + method virtual name : string - Arg.parse argspec anon_fun usage_msg - -let xmls = - (* Connect to the hypervisor. *) - let conn = - let name = !uri in - try C.connect_readonly ?name () - with - Libvirt.Virterror err -> - prerr_endline (Libvirt.Virterror.to_string err); - (* If non-root and no explicit connection URI, print a warning. *) - if Unix.geteuid () <> 0 && name = None then ( - print_endline "NB: If you want to monitor a local Xen hypervisor, you usually need to be root"; - ); - exit 1 in - - (* Get the list of active & inactive domains. *) - let doms = - let nr_active_doms = C.num_of_domains conn in - let active_doms = Array.to_list (C.list_domains conn nr_active_doms) in - let active_doms = List.map (D.lookup_by_id conn) active_doms in - let nr_inactive_doms = C.num_of_defined_domains conn in - let inactive_doms = - Array.to_list (C.list_defined_domains conn nr_inactive_doms) in - let inactive_doms = List.map (D.lookup_by_name conn) inactive_doms in - active_doms @ inactive_doms in - - (* Get their XML. *) - let xmls = List.map D.get_xml_desc doms in - - (* Parse the XML. *) - let xmls = List.map Xml.parse_string xmls in - - (* Return just the XML documents - everything else will be closed - * and freed including the connection to the hypervisor. - *) - xmls + (* Helper method to read a chunk of data into a bitstring. *) + method read_bitstring offset len = + let str = self#read offset len in + (str, 0, len * 8) +end + +(* A concrete device which just direct-maps a file or /dev device. *) +class block_device filename = + let fd = openfile filename [ O_RDONLY ] 0 in + let size = (LargeFile.fstat fd).LargeFile.st_size in +object (self) + inherit device + method read offset len = + ignore (LargeFile.lseek fd offset SEEK_SET); + let str = String.make len '\000' in + read fd str 0 len; + str + method size = size + method name = filename +end + +(* A null device. Any attempt to read generates an error. *) +let null_device : device = +object + inherit device + method read _ _ = assert false + method size = 0L + method name = "null" +end + +(* Domains and candidate guest block devices. *) -(* Parse out the device XML to get the names of disks. *) type domain = { dom_name : string; (* Domain name. *) dom_id : int option; (* Domain ID (if running). *) dom_disks : disk list; (* Domain disks. *) } and disk = { + (* From the XML ... *) d_type : string option; (* The *) - d_device : string option; (* The *) - d_source : string option; (* The *) - d_target : string option; (* The *) + d_device : string; (* The (eg "disk") *) + d_source : string; (* The *) + d_target : string; (* The (eg "hda") *) + + (* About the device itself. *) + d_dev : device; (* Disk device. *) + d_content : disk_content; (* What's on it. *) } +and disk_content = + [ `Unknown (* Not probed or unknown. *) + | `Partitions of partitions (* Contains partitions. *) + | `Filesystem of filesystem (* Contains a filesystem directly. *) + | `PhysicalVolume of unit (* Contains an LVM PV. *) + ] -let doms : domain list = - (* Grr.. Need to use a library which has XPATH support (or cduce). *) - List.map ( - fun xml -> - let nodes, domain_attrs = - match xml with - | Xml.Element ("domain", attrs, children) -> children, attrs - | _ -> failwith "get_xml_desc didn't return " in - - let domid = - try Some (int_of_string (List.assoc "id" domain_attrs)) - with Not_found -> None in - - let rec loop = function - | [] -> - failwith "get_xml_desc returned no node in XML" - | Xml.Element ("name", _, [Xml.PCData name]) :: _ -> name - | Xml.Element ("name", _, _) :: _ -> - failwith "get_xml_desc returned strange node" - | _ :: rest -> loop rest - in - let name = loop nodes in - - let devices = - let devices = - List.filter_map ( - function - | Xml.Element ("devices", _, devices) -> Some devices - | _ -> None - ) nodes in - List.concat devices in - - let rec target_dev_of = function - | [] -> None - | Xml.Element ("target", attrs, _) :: rest -> - (try Some (List.assoc "dev" attrs) - with Not_found -> target_dev_of rest) - | _ :: rest -> target_dev_of rest - in - - let rec source_file_of = function - | [] -> None - | Xml.Element ("source", attrs, _) :: rest -> - (try Some (List.assoc "file" attrs) - with Not_found -> source_file_of rest) - | _ :: rest -> source_file_of rest - in - - let rec source_dev_of = function - | [] -> None - | Xml.Element ("source", attrs, _) :: rest -> - (try Some (List.assoc "dev" attrs) - with Not_found -> source_dev_of rest) - | _ :: rest -> source_dev_of rest - in - - let disks = - List.filter_map ( - function - | Xml.Element ("disk", attrs, children) -> - let typ = - try Some (List.assoc "type" attrs) - with Not_found -> None in - let device = - try Some (List.assoc "device" attrs) - with Not_found -> None in - let source = - match source_file_of children with - | (Some _) as source -> source - | None -> source_dev_of children in - let target = target_dev_of children in - - Some { - d_type = typ; d_device = device; - d_source = source; d_target = target +(* Partitions. *) + +and partitions = { + parts_name : string; (* Name of partitioning scheme. *) + parts : partition list (* Partitions. *) +} +and partition = { + part_status : partition_status; (* Bootable, etc. *) + part_type : int; (* Partition filesystem type. *) + part_dev : device; (* Partition device. *) + part_content : partition_content; (* What's on it. *) +} +and partition_status = Bootable | Nonbootable | Malformed | NullEntry +and partition_content = + [ `Unknown (* Not probed or unknown. *) + | `Filesystem of filesystem (* Filesystem. *) + | `PhysicalVolume of unit (* Contains an LVM PV. *) + ] + +(* Filesystems (also swap devices). *) +and filesystem = { + fs_name : string; (* Name of filesystem. *) + fs_block_size : int64; (* Block size (bytes). *) + fs_blocks_total : int64; (* Total blocks. *) + fs_is_swap : bool; (* If swap, following not valid. *) + fs_blocks_reserved : int64; (* Blocks reserved for super-user. *) + fs_blocks_avail : int64; (* Blocks free (available). *) + fs_blocks_used : int64; (* Blocks in use. *) + fs_inodes_total : int64; (* Total inodes. *) + fs_inodes_reserved : int64; (* Inodes reserved for super-user. *) + fs_inodes_avail : int64; (* Inodes free (available). *) + fs_inodes_used : int64; (* Inodes in use. *) +} + +(* Convert partition, filesystem types to printable strings for debugging. *) +let string_of_partition + { part_status = status; part_type = typ; part_dev = dev } = + sprintf "%s: %s partition type %d" + dev#name + (match status with + | Bootable -> "bootable" + | Nonbootable -> "nonbootable" + | Malformed -> "malformed" + | NullEntry -> "empty") + typ + +let string_of_filesystem { fs_name = name; fs_is_swap = swap } = + if not swap then name + else name ^ " [swap]" + +(* Register a partition scheme. *) +let partition_types = ref [] +let partition_type_register (parts_name : string) probe_fn = + partition_types := (parts_name, probe_fn) :: !partition_types + +(* Probe a device for partitions. Returns [Some parts] or [None]. *) +let probe_for_partitions dev = + if debug then eprintf "probing for partitions on %s ...\n%!" dev#name; + let rec loop = function + | [] -> None + | (parts_name, probe_fn) :: rest -> + try Some (probe_fn dev) + with Not_found -> loop rest + in + let r = loop !partition_types in + if debug then ( + match r with + | None -> eprintf "no partitions found on %s\n%!" dev#name + | Some { parts_name = name; parts = parts } -> + eprintf "found %d %s partitions on %s:\n" + (List.length parts) name dev#name; + List.iter (fun p -> eprintf "\t%s\n%!" (string_of_partition p)) parts + ); + r + +(* Register a filesystem type (or swap). *) +let filesystem_types = ref [] +let filesystem_type_register (fs_name : string) probe_fn = + filesystem_types := (fs_name, probe_fn) :: !filesystem_types + +(* Probe a device for filesystems. Returns [Some fs] or [None]. *) +let probe_for_filesystems dev = + if debug then eprintf "probing for a filesystem on %s ...\n%!" dev#name; + let rec loop = function + | [] -> None + | (fs_name, probe_fn) :: rest -> + try Some (probe_fn dev) + with Not_found -> loop rest + in + let r = loop !filesystem_types in + if debug then ( + match r with + | None -> eprintf "no filesystem found on %s\n%!" dev#name + | Some fs -> + eprintf "found a filesystem on %s:\n" dev#name; + eprintf "\t%s\n%!" (string_of_filesystem fs) + ); + r + +(* Register a volume management type. *) +(* +let lvm_types = ref [] +let lvm_type_register (lvm_name : string) probe_fn = + lvm_types := (lvm_name, probe_fn) :: !lvm_types +*) + +(*----------------------------------------------------------------------*) + +let main () = + (* Command line argument parsing. *) + let set_uri = function "" -> uri := None | u -> uri := Some u in + + let version () = + printf "virt-df %s\n" (Libvirt_version.version); + + let major, minor, release = + let v, _ = Libvirt.get_version () in + v / 1_000_000, (v / 1_000) mod 1_000, v mod 1_000 in + printf "libvirt %d.%d.%d\n" major minor release; + exit 0 + in + + let test_mode filename = + test_files := filename :: !test_files + in + + let argspec = Arg.align [ + "-a", Arg.Set all, + " " ^ s_ "Show all domains (default: only active domains)"; + "--all", Arg.Set all, + " " ^ s_ "Show all domains (default: only active domains)"; + "-c", Arg.String set_uri, + "uri " ^ s_ "Connect to URI (default: Xen)"; + "--connect", Arg.String set_uri, + "uri " ^ s_ "Connect to URI (default: Xen)"; + "-h", Arg.Set human, + " " ^ s_ "Print sizes in human-readable format"; + "--human-readable", Arg.Set human, + " " ^ s_ "Print sizes in human-readable format"; + "-i", Arg.Set inodes, + " " ^ s_ "Show inodes instead of blocks"; + "--inodes", Arg.Set inodes, + " " ^ s_ "Show inodes instead of blocks"; + "-t", Arg.String test_mode, + "dev" ^ s_ "(Test mode) Display contents of block device or file"; + "--version", Arg.Unit version, + " " ^ s_ "Display version and exit"; + ] in + + let anon_fun str = + raise (Arg.Bad (sprintf (f_ "%s: unknown parameter") str)) in + let usage_msg = s_ "virt-df : like 'df', shows disk space used in guests + +SUMMARY + virt-df [-options] + +OPTIONS" in + + Arg.parse argspec anon_fun usage_msg; + + let doms : domain list = + if !test_files = [] then ( + let xmls = + (* Connect to the hypervisor. *) + let conn = + let name = !uri in + try C.connect_readonly ?name () + with + Libvirt.Virterror err -> + prerr_endline (Libvirt.Virterror.to_string err); + (* If non-root and no explicit connection URI, print a warning. *) + if geteuid () <> 0 && name = None then ( + print_endline (s_ "NB: If you want to monitor a local Xen hypervisor, you usually need to be root"); + ); + exit 1 in + + (* Get the list of active & inactive domains. *) + let doms = + let nr_active_doms = C.num_of_domains conn in + let active_doms = + Array.to_list (C.list_domains conn nr_active_doms) in + let active_doms = + List.map (D.lookup_by_id conn) active_doms in + if not !all then + active_doms + else ( + let nr_inactive_doms = C.num_of_defined_domains conn in + let inactive_doms = + Array.to_list (C.list_defined_domains conn nr_inactive_doms) in + let inactive_doms = + List.map (D.lookup_by_name conn) inactive_doms in + active_doms @ inactive_doms + ) in + + (* Get their XML. *) + let xmls = List.map D.get_xml_desc doms in + + (* Parse the XML. *) + let xmls = List.map Xml.parse_string xmls in + + (* Return just the XML documents - everything else will be closed + * and freed including the connection to the hypervisor. + *) + xmls in + + (* Grr.. Need to use a library which has XPATH support (or cduce). *) + List.map ( + fun xml -> + let nodes, domain_attrs = + match xml with + | Xml.Element ("domain", attrs, children) -> children, attrs + | _ -> failwith (s_ "get_xml_desc didn't return ") in + + let domid = + try Some (int_of_string (List.assoc "id" domain_attrs)) + with Not_found -> None in + + let rec loop = function + | [] -> + failwith (s_ "get_xml_desc returned no node in XML") + | Xml.Element ("name", _, [Xml.PCData name]) :: _ -> name + | Xml.Element ("name", _, _) :: _ -> + failwith (s_ "get_xml_desc returned strange node") + | _ :: rest -> loop rest + in + let name = loop nodes in + + let devices = + let devices = + List.filter_map ( + function + | Xml.Element ("devices", _, devices) -> Some devices + | _ -> None + ) nodes in + List.concat devices in + + let rec target_dev_of = function + | [] -> None + | Xml.Element ("target", attrs, _) :: rest -> + (try Some (List.assoc "dev" attrs) + with Not_found -> target_dev_of rest) + | _ :: rest -> target_dev_of rest + in + + let rec source_file_of = function + | [] -> None + | Xml.Element ("source", attrs, _) :: rest -> + (try Some (List.assoc "file" attrs) + with Not_found -> source_file_of rest) + | _ :: rest -> source_file_of rest + in + + let rec source_dev_of = function + | [] -> None + | Xml.Element ("source", attrs, _) :: rest -> + (try Some (List.assoc "dev" attrs) + with Not_found -> source_dev_of rest) + | _ :: rest -> source_dev_of rest + in + + let disks = + List.filter_map ( + function + | Xml.Element ("disk", attrs, children) -> + let typ = + try Some (List.assoc "type" attrs) + with Not_found -> None in + let device = + try Some (List.assoc "device" attrs) + with Not_found -> None in + let source = + match source_file_of children with + | (Some _) as source -> source + | None -> source_dev_of children in + let target = target_dev_of children in + + (* We only care about devices where we have + * source and target. Ignore CD-ROM devices. + *) + (match source, target, device with + | _, _, Some "cdrom" -> None (* ignore *) + | Some source, Some target, Some device -> + (* Try to create a 'device' object for this + * device. If it fails, print a warning + * and ignore the device. + *) + (try + let dev = new block_device source in + Some { + d_type = typ; d_device = device; + d_source = source; d_target = target; + d_dev = dev; d_content = `Unknown + } + with + Unix_error (err, func, param) -> + eprintf "%s:%s: %s" func param (error_message err); + None + ) + | _ -> None (* ignore anything else *) + ) + + | _ -> None + ) devices in + + { dom_name = name; dom_id = domid; dom_disks = disks } + ) xmls + ) else ( + (* In test mode (-t option) the user can pass one or more + * block devices or filenames (containing partitions/filesystems/etc) + * which we use for testing virt-df itself. We create fake domains + * from these. + *) + List.map ( + fun filename -> + { + dom_name = filename; dom_id = None; + dom_disks = [ + { + d_type = Some "disk"; d_device = "disk"; + d_source = filename; d_target = "hda"; + d_dev = new block_device filename; d_content = `Unknown; } - | _ -> None - ) devices in - - { dom_name = name; dom_id = domid; dom_disks = disks } - ) xmls - -(* Print the domains / devices. *) -let () = - List.iter ( - fun { dom_name = dom_name; dom_disks = dom_disks } -> - printf "%s:\n" dom_name; - List.iter ( - function - | { d_source = Some source; d_target = Some target } -> - printf "\t%s -> %s\n" source target - | { d_type = None; d_device = Some "cdrom"; - d_source = None; d_target = Some target } -> - printf "\t[CD] -> %s\n" target - | _ -> - printf "\t(device omitted, missing or in XML\n"; - ) dom_disks - ) doms + ] + } + ) !test_files + ) in + + (* HOF to map over disks. *) + let map_over_disks doms f = + List.map ( + fun ({ dom_disks = disks } as dom) -> + let disks = List.map f disks in + { dom with dom_disks = disks } + ) doms + in + + (* 'doms' is our list of domains and their guest block devices, and + * we've successfully opened each block device. Now probe them + * to find out what they contain. + *) + let doms = map_over_disks doms ( + fun ({ d_dev = dev } as disk) -> + (* See if it is partitioned first. *) + let parts = probe_for_partitions dev in + match parts with + | Some parts -> + { disk with d_content = `Partitions parts } + | None -> + (* Not partitioned. Does it contain a filesystem? *) + let fs = probe_for_filesystems dev in + match fs with + | Some fs -> + { disk with d_content = `Filesystem fs } + | None -> + (* Not partitioned, no filesystem, so it's spare. *) + disk + ) in + + (* Now we have either detected partitions or a filesystem on each + * physical device (or perhaps neither). See what is on those + * partitions. + *) + let doms = map_over_disks doms ( + function + | ({ d_dev = dev; d_content = `Partitions parts } as disk) -> + let ps = List.map ( + fun p -> + if p.part_status = Bootable || p.part_status = Nonbootable then ( + let fs = probe_for_filesystems p.part_dev in + match fs with + | Some fs -> + { p with part_content = `Filesystem fs } + | None -> + p + ) else p + ) parts.parts in + let parts = { parts with parts = ps } in + { disk with d_content = `Partitions parts } + | disk -> disk + ) in + + (* XXX LVM stuff here. *) + + + + (* Print the title. *) + let () = + let total, used, avail = + match !inodes, !human with + | false, false -> s_ "1K-blocks", s_ "Used", s_ "Available" + | false, true -> s_ "Size", s_ "Used", s_ "Available" + | true, _ -> s_ "Inodes", s_ "IUse", s_ "IFree" in + printf "%-20s %10s %10s %10s %s\n%!" + (s_ "Filesystem") total used avail (s_ "Type") in + + let printable_size bytes = + if bytes < 1024L *^ 1024L then + sprintf "%Ld bytes" bytes + else if bytes < 1024L *^ 1024L *^ 1024L then + sprintf "%.1f MiB" (Int64.to_float (bytes /^ 1024L) /. 1024.) + else + sprintf "%.1f GiB" (Int64.to_float (bytes /^ 1024L /^ 1024L) /. 1024.) + in + + (* HOF to iterate over filesystems. *) + let iter_over_filesystems doms f = + List.iter ( + fun ({ dom_disks = disks } as dom) -> + List.iter ( + function + | ({ d_content = `Filesystem fs } as disk) -> + f dom disk None fs + | ({ d_content = `Partitions partitions } as disk) -> + List.iteri ( + fun i -> + function + | ({ part_content = `Filesystem fs } as part) -> + f dom disk (Some (part, i)) fs + | _ -> () + ) partitions.parts + | _ -> () + ) disks + ) doms + in + + (* Print stats for each recognized filesystem. *) + let print_stats dom disk part fs = + (* Printable name is like "domain:hda" or "domain:hda1". *) + let name = + let dom_name = dom.dom_name in + let d_target = disk.d_target in + match part with + | None -> + dom_name ^ ":" ^ d_target + | Some (_, pnum) -> + dom_name ^ ":" ^ d_target ^ string_of_int pnum in + printf "%-20s " name; + + if fs.fs_is_swap then ( + (* Swap partition. *) + if not !human then + printf "%10Ld %s\n" + (fs.fs_block_size *^ fs.fs_blocks_total /^ 1024L) fs.fs_name + else + printf "%10s %s\n" + (printable_size (fs.fs_block_size *^ fs.fs_blocks_total)) fs.fs_name + ) else ( + (* Ordinary filesystem. *) + if not !inodes then ( (* Block display. *) + (* 'df' doesn't count the restricted blocks. *) + let blocks_total = fs.fs_blocks_total -^ fs.fs_blocks_reserved in + let blocks_avail = fs.fs_blocks_avail -^ fs.fs_blocks_reserved in + let blocks_avail = if blocks_avail < 0L then 0L else blocks_avail in + + if not !human then ( (* Display 1K blocks. *) + printf "%10Ld %10Ld %10Ld %s\n" + (blocks_total *^ fs.fs_block_size /^ 1024L) + (fs.fs_blocks_used *^ fs.fs_block_size /^ 1024L) + (blocks_avail *^ fs.fs_block_size /^ 1024L) + fs.fs_name + ) else ( (* Human-readable blocks. *) + printf "%10s %10s %10s %s\n" + (printable_size (blocks_total *^ fs.fs_block_size)) + (printable_size (fs.fs_blocks_used *^ fs.fs_block_size)) + (printable_size (blocks_avail *^ fs.fs_block_size)) + fs.fs_name + ) + ) else ( (* Inodes display. *) + printf "%10Ld %10Ld %10Ld %s\n" + fs.fs_inodes_total fs.fs_inodes_used fs.fs_inodes_avail + fs.fs_name + ) + ) + in + iter_over_filesystems doms print_stats + +(* +(* Probe a single partition, which we assume contains either a + * filesystem or is a PV. + * - target will be something like "hda" or "hda1" + * - part_type will be the partition type if known, or None + * - fd is a file descriptor opened on the device + * - start & size are where we think the start and size of the + * partition is within the file descriptor (in SECTORS) + *) +and probe_partition target part_type fd start size = + match part_type with + | None -> + ProbeFailed (s_ "detection of unpartitioned devices not yet supported") + | Some 0x05 -> + ProbeIgnore (* Extended partition - ignore it. *) + | Some part_type -> + try + let probe_fn = Hashtbl.find filesystems part_type in + probe_fn target part_type fd start size + with + Not_found -> + ProbeFailed + (sprintf (f_ "unsupported partition type %02x") part_type) +*)