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Use mutex to avoid concurrent btrfs operations #43

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Merged
talex5 merged 1 commit into from
Nov 24, 2020
Merged

Use mutex to avoid concurrent btrfs operations #43

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7 changes: 6 additions & 1 deletion lib/btrfs_store.ml
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Original file line number Diff line number Diff line change
Expand Up @@ -24,10 +24,15 @@ type t = {
let ( / ) = Filename.concat

module Btrfs = struct
(* Avoid doing multiple btrfs operations at once... maybe causes hangs *)
let lock = Lwt_mutex.create ()

let btrfs ?(sudo=false) args =
let args = "btrfs" :: args in
let args = if sudo && not running_as_root then "sudo" :: args else args in
Os.exec ~stdout:`Dev_null args
Lwt_mutex.with_lock lock (fun () ->
Os.exec ~stdout:`Dev_null args
)

let subvolume_create path =
assert (not (Sys.file_exists path));
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