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Use swapfs #16

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hannes merged 16 commits from swap into main 2024-11-08 12:54:01 +00:00
Conversation 8 Commits 16 Files changed 6 +78 -72
1 changed files with 78 additions and 72 deletions
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mirage/unikernel.ml
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@ -102,37 +102,40 @@ module Make
hm "" hm ""
module Git = struct module Git = struct
let find_contents store = let contents store =
let rec go store path acc = let explore = ref [ Mirage_kv.Key.empty ] in
Store.list store path >>= function let more () =
| Error e -> let rec go () =
Logs.err (fun m -> m "error %a while listing %a" match !explore with
Store.pp_error e Mirage_kv.Key.pp path); | [] -> Lwt.return None
Lwt.return acc | step :: tl ->
| Ok steps -> explore := tl;
Lwt_list.fold_left_s (fun acc (step, _) ->
Store.exists store step >>= function Store.exists store step >>= function
| Error e -> | Error e ->
Logs.err (fun m -> m "error %a for exists %a" Store.pp_error e Logs.err (fun m -> m "error %a for exists %a" Store.pp_error e
Mirage_kv.Key.pp step); Mirage_kv.Key.pp step);
Lwt.return acc go ()
| Ok None -> | Ok None ->
Logs.warn (fun m -> m "no typ for %a" Mirage_kv.Key.pp step); Logs.warn (fun m -> m "no typ for %a" Mirage_kv.Key.pp step);
Lwt.return acc go ()
| Ok Some `Value -> Lwt.return (step :: acc) | Ok Some `Value -> Lwt.return (Some step)
| Ok Some `Dictionary -> go store step acc) acc steps | Ok Some `Dictionary ->
Store.list store step >>= function
| Error e ->
Logs.err (fun m -> m "error %a while listing %a"
Store.pp_error e Mirage_kv.Key.pp step);
go ()
| Ok steps ->
explore := !explore @ List.map fst steps;
go ()
in in
go store Mirage_kv.Key.empty [] go ()
in
Lwt_stream.from more
let find_urls store = let find_urls acc path data =
find_contents store >>= fun paths -> if Mirage_kv.Key.basename path = "opam" then
let opam_paths = (* TODO: parser errors are logged (should be reported to status page) *)
List.filter (fun p -> Mirage_kv.Key.basename p = "opam") paths
in
Lwt_list.fold_left_s (fun acc path ->
Store.get store path >|= function
| Ok data ->
(* TODO report parser errors *)
(try (try
let url_csums = Opam_file.extract_urls (Mirage_kv.Key.to_string path) data in let url_csums = Opam_file.extract_urls (Mirage_kv.Key.to_string path) data in
List.fold_left (fun acc (url, csums) -> List.fold_left (fun acc (url, csums) ->
@ -153,11 +156,13 @@ module Make
url (hm_to_s csums') (hm_to_s csums)); url (hm_to_s csums') (hm_to_s csums));
None None
end) acc) acc url_csums end) acc) acc url_csums
with _ -> with exn ->
Logs.warn (fun m -> m "some error in %a, ignoring" Mirage_kv.Key.pp path); Logs.warn (fun m -> m "some error in %a, ignoring %s"
Mirage_kv.Key.pp path (Printexc.to_string exn));
acc) acc)
| Error e -> Logs.warn (fun m -> m "Store.get: %a" Store.pp_error e); acc) else
SM.empty opam_paths acc
end end
let active_downloads = ref SM.empty let active_downloads = ref SM.empty
@ -506,15 +511,15 @@ module Make
then Tar.High (High.inj (Lwt.return_ok None)) then Tar.High (High.inj (Lwt.return_ok None))
else begin closed := true; Tar.High (High.inj (Lwt.return_ok (Some data))) end else begin closed := true; Tar.High (High.inj (Lwt.return_ok (Some data))) end
let entries_of_git ~mtime store repo = let entries_of_git ~mtime store repo urls =
Git.find_contents store >>= fun paths -> let entries = Git.contents store in
let entries = Lwt_stream.of_list paths in
let to_entry path = let to_entry path =
Store.get store path >|= function Store.get store path >|= function
| Ok data -> | Ok data ->
let data = let data =
if Mirage_kv.Key.(equal path (v "repo")) if Mirage_kv.Key.(equal path (v "repo"))
then repo else data in then repo else data
in
let file_mode = 0o644 let file_mode = 0o644
and mod_time = Int64.of_int mtime and mod_time = Int64.of_int mtime
and user_id = 0 and user_id = 0
@ -522,6 +527,7 @@ module Make
and size = String.length data in and size = String.length data in
let hdr = Tar.Header.make ~file_mode ~mod_time ~user_id ~group_id let hdr = Tar.Header.make ~file_mode ~mod_time ~user_id ~group_id
(Mirage_kv.Key.to_string path) (Int64.of_int size) in (Mirage_kv.Key.to_string path) (Int64.of_int size) in
urls := Git.find_urls !urls path data;
Some (Some Tar.Header.Ustar, hdr, once data) Some (Some Tar.Header.Ustar, hdr, once data)
| Error _ -> None in | Error _ -> None in
let entries = Lwt_stream.filter_map_s to_entry entries in let entries = Lwt_stream.filter_map_s to_entry entries in
@ -530,12 +536,13 @@ module Make
let of_git repo store = let of_git repo store =
let now = Ptime.v (Pclock.now_d_ps ()) in let now = Ptime.v (Pclock.now_d_ps ()) in
let mtime = Option.value ~default:0 Ptime.(Span.to_int_s (to_span now)) in let mtime = Option.value ~default:0 Ptime.(Span.to_int_s (to_span now)) in
entries_of_git ~mtime store repo >>= fun entries -> let urls = ref SM.empty in
entries_of_git ~mtime store repo urls >>= fun entries ->
let t = Tar.out ~level:Ustar entries in let t = Tar.out ~level:Ustar entries in
let t = Tar_gz.out_gzipped ~level:4 ~mtime:(Int32.of_int mtime) Gz.Unix t in let t = Tar_gz.out_gzipped ~level:4 ~mtime:(Int32.of_int mtime) Gz.Unix t in
let buf = Buffer.create 1024 in let buf = Buffer.create 1024 in
to_buffer buf t >|= function to_buffer buf t >|= function
| Ok () -> Buffer.contents buf | Ok () -> Buffer.contents buf, !urls
| Error (`Msg msg) -> failwith msg | Error (`Msg msg) -> failwith msg
end end
@ -588,8 +595,8 @@ stamp: %S
commit_id git_kv >>= fun commit_id -> commit_id git_kv >>= fun commit_id ->
modified git_kv >>= fun modified -> modified git_kv >>= fun modified ->
let repo = repo remote commit_id in let repo = repo remote commit_id in
Tarball.of_git repo git_kv >|= fun index -> Tarball.of_git repo git_kv >|= fun (index, urls) ->
{ commit_id ; modified ; repo ; index } { commit_id ; modified ; repo ; index }, urls
let update_lock = Lwt_mutex.create () let update_lock = Lwt_mutex.create ()
@ -602,18 +609,18 @@ stamp: %S
Lwt.return None Lwt.return None
| Ok [] -> | Ok [] ->
Logs.info (fun m -> m "git changes are empty"); Logs.info (fun m -> m "git changes are empty");
Lwt.return (Some []) Lwt.return (Some ([], SM.empty))
| Ok changes -> | Ok changes ->
commit_id git_kv >>= fun commit_id -> commit_id git_kv >>= fun commit_id ->
modified git_kv >>= fun modified -> modified git_kv >>= fun modified ->
Logs.info (fun m -> m "git: %s" commit_id); Logs.info (fun m -> m "git: %s" commit_id);
let repo = repo remote commit_id in let repo = repo remote commit_id in
Tarball.of_git repo git_kv >|= fun index -> Tarball.of_git repo git_kv >|= fun (index, urls) ->
t.commit_id <- commit_id ; t.commit_id <- commit_id ;
t.modified <- modified ; t.modified <- modified ;
t.repo <- repo ; t.repo <- repo ;
t.index <- index; t.index <- index;
Some changes) Some (changes, urls))
let status disk = let status disk =
(* report status: (* report status:
@ -796,9 +803,8 @@ stamp: %S
end end
let download_archives parallel_downloads disk http_client store = let download_archives parallel_downloads disk http_client urls =
(* FIXME: handle resuming partial downloads *) (* FIXME: handle resuming partial downloads *)
Git.find_urls store >>= fun urls ->
let pool = Lwt_pool.create parallel_downloads (Fun.const Lwt.return_unit) in let pool = Lwt_pool.create parallel_downloads (Fun.const Lwt.return_unit) in
let idx = ref 0 in let idx = ref 0 in
Lwt_list.iter_p (fun (url, csums) -> Lwt_list.iter_p (fun (url, csums) ->
@ -901,14 +907,14 @@ stamp: %S
Logs.info (fun m -> m "Done initializing git state!"); Logs.info (fun m -> m "Done initializing git state!");
Serve.commit_id git_kv >>= fun commit_id -> Serve.commit_id git_kv >>= fun commit_id ->
Logs.info (fun m -> m "git: %s" commit_id); Logs.info (fun m -> m "git: %s" commit_id);
Serve.create remote git_kv >>= fun serve -> Serve.create remote git_kv >>= fun (serve, urls) ->
Paf.init ~port:(K.port ()) (Stack.tcp stack) >>= fun t -> Paf.init ~port:(K.port ()) (Stack.tcp stack) >>= fun t ->
let update () = let update () =
Serve.update_git ~remote serve git_kv >>= function Serve.update_git ~remote serve git_kv >>= function
| None | Some [] -> Lwt.return_unit | None | Some ([], _) -> Lwt.return_unit
| Some _changes -> | Some (_changes, urls) ->
dump_git git_dump git_kv >>= fun () -> dump_git git_dump git_kv >>= fun () ->
download_archives (K.parallel_downloads ()) disk http_ctx git_kv download_archives (K.parallel_downloads ()) disk http_ctx urls
in in
let service = let service =
Paf.http_service Paf.http_service
@ -924,7 +930,7 @@ stamp: %S
go () go ()
in in
go ()); go ());
download_archives (K.parallel_downloads ()) disk http_ctx git_kv >>= fun () -> download_archives (K.parallel_downloads ()) disk http_ctx urls >>= fun () ->
(th >|= fun _v -> ()) (th >|= fun _v -> ())
let start block _time _pclock stack git_ctx http_ctx = let start block _time _pclock stack git_ctx http_ctx =