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Wed, 31 Jan 2024 02:53:02 -0800 (PST) From: =?UTF-8?q?Edwin=20T=C3=B6r=C3=B6k?= To: xen-devel@lists.xenproject.org Cc: =?UTF-8?q?Edwin=20T=C3=B6r=C3=B6k?= , Christian Lindig , David Scott , Wei Liu , Anthony PERARD Subject: [PATCH v1 2/2] oxenstored: make Quota.t pure Date: Wed, 31 Jan 2024 10:52:56 +0000 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @cloud.com) X-ZM-MESSAGEID: 1706698416411100003 Now that we no longer have a hashtable inside we can make Quota.t pure, and push the mutable update to its callers. Store.t already had a mutable Quota.t field. No functional change. Signed-off-by: Edwin T=C3=B6r=C3=B6k Acked-by: Christian Lindig --- tools/ocaml/xenstored/quota.ml | 8 ++++---- tools/ocaml/xenstored/store.ml | 17 ++++++++++------- 2 files changed, 14 insertions(+), 11 deletions(-) diff --git a/tools/ocaml/xenstored/quota.ml b/tools/ocaml/xenstored/quota.ml index f6e28ecc6a..1f652040d8 100644 --- a/tools/ocaml/xenstored/quota.ml +++ b/tools/ocaml/xenstored/quota.ml @@ -33,7 +33,7 @@ module DomidMap =3D Map.Make(Domid) type t =3D { maxent: int; (* max entities per domU *) maxsize: int; (* max size of data store in one node *) - mutable cur: int DomidMap.t; (* current domains quota *) + cur: int DomidMap.t; (* current domains quota *) } =20 let to_string quota domid =3D @@ -76,10 +76,10 @@ let update_entry quota_cur id diff =3D else DomidMap.add id nb quota_cur =20 let del_entry quota id =3D - quota.cur <- update_entry quota.cur id (-1) + {quota with cur =3D update_entry quota.cur id (-1)} =20 let add_entry quota id =3D - quota.cur <- update_entry quota.cur id (+1) + {quota with cur =3D update_entry quota.cur id (+1)} =20 let merge orig_quota mod_quota dest_quota =3D let fold_merge id nb dest =3D @@ -87,5 +87,5 @@ let merge orig_quota mod_quota dest_quota =3D | 0 -> dest (* not modified *) | diff -> update_entry dest id diff (* update with [x=3Dx+diff] *) in - dest_quota.cur <- DomidMap.fold fold_merge mod_quota.cur dest_quota.cur + {dest_quota with cur =3D DomidMap.fold fold_merge mod_quota.cur dest_quo= ta.cur} (* dest_quota =3D dest_quota + (mod_quota - orig_quota) *) diff --git a/tools/ocaml/xenstored/store.ml b/tools/ocaml/xenstored/store.ml index 38a4945372..9b8dd2812d 100644 --- a/tools/ocaml/xenstored/store.ml +++ b/tools/ocaml/xenstored/store.ml @@ -85,7 +85,9 @@ module Node =3D struct raise Define.Permission_denied; end =20 - let rec recurse fct node =3D fct node; SymbolMap.iter (fun _ -> recurse = fct) node.children + let rec recurse fct node acc =3D + let acc =3D fct node acc in + SymbolMap.fold (fun _ -> recurse fct) node.children acc =20 (** [recurse_filter_map f tree] applies [f] on each node in the tree rec= ursively, possibly removing some nodes. @@ -408,7 +410,7 @@ let dump_buffer store =3D dump_store_buf store.root let set_node store path node orig_quota mod_quota =3D let root =3D Path.set_node store.root path node in store.root <- root; - Quota.merge orig_quota mod_quota store.quota + store.quota <- Quota.merge orig_quota mod_quota store.quota =20 let write store perm path value =3D let node, existing =3D get_deepest_existing_node store path in @@ -422,7 +424,7 @@ let write store perm path value =3D let root, node_created =3D path_write store perm path value in store.root <- root; if node_created - then Quota.add_entry store.quota owner + then store.quota <- Quota.add_entry store.quota owner =20 let mkdir store perm path =3D let node, existing =3D get_deepest_existing_node store path in @@ -431,7 +433,7 @@ let mkdir store perm path =3D if not (existing || (Perms.Connection.is_dom0 perm)) then Quota.check st= ore.quota owner 0; store.root <- path_mkdir store perm path; if not existing then - Quota.add_entry store.quota owner + store.quota <- Quota.add_entry store.quota owner =20 let rm store perm path =3D let rmed_node =3D Path.get_node store.root path in @@ -439,7 +441,7 @@ let rm store perm path =3D | None -> raise Define.Doesnt_exist | Some rmed_node -> store.root <- path_rm store perm path; - Node.recurse (fun node -> Quota.del_entry store.quota (Node.get_owner = node)) rmed_node + store.quota <- Node.recurse (fun node quota -> Quota.del_entry quota (= Node.get_owner node)) rmed_node store.quota =20 let setperms store perm path nperms =3D match Path.get_node store.root path with @@ -450,8 +452,9 @@ let setperms store perm path nperms =3D if not ((old_owner =3D new_owner) || (Perms.Connection.is_dom0 perm)) = then raise Define.Permission_denied; store.root <- path_setperms store perm path nperms; - Quota.del_entry store.quota old_owner; - Quota.add_entry store.quota new_owner + store.quota <- + let quota =3D Quota.del_entry store.quota old_owner in + Quota.add_entry quota new_owner =20 let reset_permissions store domid =3D Logging.info "store|node" "Cleaning up xenstore ACLs for domid %d" domid; --=20 2.43.0