Add lots of comments on how the resync queue works

(I don't really want to change/refactor that code though)
Clippy
2022-03-15 16:47:13 +01:00 · 2022-03-15 16:06:50 +01:00 · 2022-03-15 12:32:17 +01:00 · 2022-03-15 12:31:23 +01:00 · 2022-03-15 12:23:33 +01:00 · 2022-03-15 12:12:12 +01:00
16 changed files with 564 additions and 342 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -879,6 +879,7 @@ dependencies = [
 "form_urlencoded",
 "futures",
 "futures-util",
+ "garage_block",
 "garage_model 0.7.0",
 "garage_table 0.7.0",
 "garage_util 0.7.0",
@ -906,6 +907,29 @@ dependencies = [
 "url",
 ]

+[[package]]
+name = "garage_block"
+version = "0.7.0"
+dependencies = [
+ "async-trait",
+ "bytes 1.1.0",
+ "futures",
+ "futures-util",
+ "garage_rpc 0.7.0",
+ "garage_table 0.7.0",
+ "garage_util 0.7.0",
+ "hex",
+ "opentelemetry",
+ "rand 0.8.5",
+ "rmp-serde 0.15.5",
+ "serde",
+ "serde_bytes",
+ "sled",
+ "tokio",
+ "tracing",
+ "zstd",
+]
+
 [[package]]
 name = "garage_model"
 version = "0.5.1"
@ -940,6 +964,7 @@ dependencies = [
 "err-derive 0.3.1",
 "futures",
 "futures-util",
+ "garage_block",
 "garage_model 0.5.1",
 "garage_rpc 0.7.0",
 "garage_table 0.7.0",
--- a/Cargo.nix
+++ b/Cargo.nix
@ -9,6 +9,7 @@ args@{
    "garage_admin/default"
    "garage_table/default"
    "garage_model/default"
+    "garage_block/default"
    "garage_api/default"
    "garage_web/default"
    "garage/default"
@ -49,6 +50,7 @@ in
    garage_admin = rustPackages.unknown.garage_admin."0.7.0";
    garage_table = rustPackages.unknown.garage_table."0.7.0";
    garage_model = rustPackages.unknown.garage_model."0.7.0";
+    garage_block = rustPackages.unknown.garage_block."0.7.0";
    garage_api = rustPackages.unknown.garage_api."0.7.0";
    garage_web = rustPackages.unknown.garage_web."0.7.0";
    garage = rustPackages.unknown.garage."0.7.0";
@ -612,7 +614,7 @@ in
    registry = "registry+https://github.com/rust-lang/crates.io-index";
    src = fetchCratesIo { inherit name version; sha256 = "95059428f66df56b63431fdb4e1947ed2190586af5c5a8a8b71122bdf5a7f469"; };
    dependencies = {
-      ${ if hostPlatform.config == "aarch64-apple-darwin" || hostPlatform.parsed.cpu.name == "aarch64" && hostPlatform.parsed.kernel.name == "linux" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.119" { inherit profileName; };
+      ${ if hostPlatform.parsed.cpu.name == "aarch64" && hostPlatform.parsed.kernel.name == "linux" || hostPlatform.config == "aarch64-apple-darwin" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.119" { inherit profileName; };
    };
  });
  
@ -1128,7 +1130,7 @@ in
      [ "async-await" ]
      [ "async-await-macro" ]
      [ "channel" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "default")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "default")
      [ "futures-channel" ]
      [ "futures-io" ]
      [ "futures-macro" ]
@ -1237,6 +1239,7 @@ in
      form_urlencoded = rustPackages."registry+https://github.com/rust-lang/crates.io-index".form_urlencoded."1.0.1" { inherit profileName; };
      futures = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures."0.3.21" { inherit profileName; };
      futures_util = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-util."0.3.21" { inherit profileName; };
+      garage_block = rustPackages."unknown".garage_block."0.7.0" { inherit profileName; };
      garage_model = rustPackages."unknown".garage_model."0.7.0" { inherit profileName; };
      garage_table = rustPackages."unknown".garage_table."0.7.0" { inherit profileName; };
      garage_util = rustPackages."unknown".garage_util."0.7.0" { inherit profileName; };
@ -1265,6 +1268,32 @@ in
    };
  });
  
+  "unknown".garage_block."0.7.0" = overridableMkRustCrate (profileName: rec {
+    name = "garage_block";
+    version = "0.7.0";
+    registry = "unknown";
+    src = fetchCrateLocal (workspaceSrc + "/src/block");
+    dependencies = {
+      async_trait = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".async-trait."0.1.52" { profileName = "__noProfile"; };
+      bytes = rustPackages."registry+https://github.com/rust-lang/crates.io-index".bytes."1.1.0" { inherit profileName; };
+      futures = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures."0.3.21" { inherit profileName; };
+      futures_util = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-util."0.3.21" { inherit profileName; };
+      garage_rpc = rustPackages."unknown".garage_rpc."0.7.0" { inherit profileName; };
+      garage_table = rustPackages."unknown".garage_table."0.7.0" { inherit profileName; };
+      garage_util = rustPackages."unknown".garage_util."0.7.0" { inherit profileName; };
+      hex = rustPackages."registry+https://github.com/rust-lang/crates.io-index".hex."0.4.3" { inherit profileName; };
+      opentelemetry = rustPackages."registry+https://github.com/rust-lang/crates.io-index".opentelemetry."0.17.0" { inherit profileName; };
+      rand = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand."0.8.5" { inherit profileName; };
+      rmp_serde = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rmp-serde."0.15.5" { inherit profileName; };
+      serde = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde."1.0.136" { inherit profileName; };
+      serde_bytes = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde_bytes."0.11.5" { inherit profileName; };
+      sled = rustPackages."registry+https://github.com/rust-lang/crates.io-index".sled."0.34.7" { inherit profileName; };
+      tokio = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio."1.17.0" { inherit profileName; };
+      tracing = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tracing."0.1.32" { inherit profileName; };
+      zstd = rustPackages."registry+https://github.com/rust-lang/crates.io-index".zstd."0.9.2+zstd.1.5.1" { inherit profileName; };
+    };
+  });
+  
  "registry+https://github.com/rust-lang/crates.io-index".garage_model."0.5.1" = overridableMkRustCrate (profileName: rec {
    name = "garage_model";
    version = "0.5.1";
@ -1302,6 +1331,7 @@ in
      err_derive = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".err-derive."0.3.1" { profileName = "__noProfile"; };
      futures = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures."0.3.21" { inherit profileName; };
      futures_util = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-util."0.3.21" { inherit profileName; };
+      garage_block = rustPackages."unknown".garage_block."0.7.0" { inherit profileName; };
      garage_model_050 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".garage_model."0.5.1" { inherit profileName; };
      garage_rpc = rustPackages."unknown".garage_rpc."0.7.0" { inherit profileName; };
      garage_table = rustPackages."unknown".garage_table."0.7.0" { inherit profileName; };
@ -1738,12 +1768,12 @@ in
    features = builtins.concatLists [
      [ "client" ]
      [ "default" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "full")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "h2")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "full")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "h2")
      [ "http1" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "http2")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "runtime")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "server")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "http2")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "runtime")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "server")
      [ "socket2" ]
      [ "stream" ]
      [ "tcp" ]
@ -1753,7 +1783,7 @@ in
      futures_channel = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-channel."0.3.21" { inherit profileName; };
      futures_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-core."0.3.21" { inherit profileName; };
      futures_util = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-util."0.3.21" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "h2" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".h2."0.3.12" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "h2" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".h2."0.3.12" { inherit profileName; };
      http = rustPackages."registry+https://github.com/rust-lang/crates.io-index".http."0.2.6" { inherit profileName; };
      http_body = rustPackages."registry+https://github.com/rust-lang/crates.io-index".http-body."0.4.4" { inherit profileName; };
      httparse = rustPackages."registry+https://github.com/rust-lang/crates.io-index".httparse."1.6.0" { inherit profileName; };
@ -1845,7 +1875,7 @@ in
    registry = "registry+https://github.com/rust-lang/crates.io-index";
    src = fetchCratesIo { inherit name version; sha256 = "282a6247722caba404c065016bbfa522806e51714c34f5dfc3e4a3a46fcb4223"; };
    features = builtins.concatLists [
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "std")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "std")
    ];
    dependencies = {
      hashbrown = rustPackages."registry+https://github.com/rust-lang/crates.io-index".hashbrown."0.11.2" { inherit profileName; };
@ -2424,10 +2454,10 @@ in
    src = fetchCratesIo { inherit name version; sha256 = "22c545a13b0c47b47e8052b35c4884dbe33c9ea62607371b0f4f1b0490cafd38"; };
    features = builtins.concatLists [
      [ "default" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "opentelemetry")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "opentelemetry-contrib")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "rand")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "telemetry")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "opentelemetry")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "opentelemetry-contrib")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "rand")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "telemetry")
    ];
    dependencies = {
      arc_swap = rustPackages."registry+https://github.com/rust-lang/crates.io-index".arc-swap."1.5.0" { inherit profileName; };
@ -2440,9 +2470,9 @@ in
      kuska_handshake = rustPackages."registry+https://github.com/rust-lang/crates.io-index".kuska-handshake."0.2.0" { inherit profileName; };
      sodiumoxide = rustPackages."registry+https://github.com/rust-lang/crates.io-index".kuska-sodiumoxide."0.2.5-0" { inherit profileName; };
      log = rustPackages."registry+https://github.com/rust-lang/crates.io-index".log."0.4.14" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "opentelemetry" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".opentelemetry."0.17.0" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "opentelemetry_contrib" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".opentelemetry-contrib."0.9.0" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "rand" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand."0.5.6" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "opentelemetry" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".opentelemetry."0.17.0" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "opentelemetry_contrib" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".opentelemetry-contrib."0.9.0" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "rand" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand."0.5.6" { inherit profileName; };
      rmp_serde = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rmp-serde."0.14.4" { inherit profileName; };
      serde = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde."1.0.136" { inherit profileName; };
      tokio = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio."1.17.0" { inherit profileName; };
@ -2562,7 +2592,7 @@ in
    registry = "registry+https://github.com/rust-lang/crates.io-index";
    src = fetchCratesIo { inherit name version; sha256 = "0c7ae222234c30df141154f159066c5093ff73b63204dcda7121eb082fc56a95"; };
    features = builtins.concatLists [
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "vendored")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "vendored")
    ];
    dependencies = {
      bitflags = rustPackages."registry+https://github.com/rust-lang/crates.io-index".bitflags."1.3.2" { inherit profileName; };
@ -2600,8 +2630,8 @@ in
    registry = "registry+https://github.com/rust-lang/crates.io-index";
    src = fetchCratesIo { inherit name version; sha256 = "7e46109c383602735fa0a2e48dd2b7c892b048e1bf69e5c3b1d804b7d9c203cb"; };
    features = builtins.concatLists [
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "openssl-src")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "vendored")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "openssl-src")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "vendored")
    ];
    dependencies = {
      libc = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.119" { inherit profileName; };
@ -2609,7 +2639,7 @@ in
    buildDependencies = {
      autocfg = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".autocfg."1.1.0" { profileName = "__noProfile"; };
      cc = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".cc."1.0.73" { profileName = "__noProfile"; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "openssl_src" else null } = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".openssl-src."111.17.0+1.1.1m" { profileName = "__noProfile"; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "openssl_src" else null } = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".openssl-src."111.17.0+1.1.1m" { profileName = "__noProfile"; };
      pkg_config = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".pkg-config."0.3.24" { profileName = "__noProfile"; };
      ${ if hostPlatform.parsed.abi.name == "msvc" then "vcpkg" else null } = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".vcpkg."0.2.15" { profileName = "__noProfile"; };
    };
@ -2623,23 +2653,23 @@ in
    features = builtins.concatLists [
      [ "async-trait" ]
      [ "crossbeam-channel" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "dashmap")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "dashmap")
      [ "default" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "fnv")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "metrics")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "fnv")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "metrics")
      [ "percent-encoding" ]
      [ "pin-project" ]
      [ "rand" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "rt-tokio")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "tokio")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "tokio-stream")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "rt-tokio")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "tokio")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "tokio-stream")
      [ "trace" ]
    ];
    dependencies = {
      async_trait = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".async-trait."0.1.52" { profileName = "__noProfile"; };
      crossbeam_channel = rustPackages."registry+https://github.com/rust-lang/crates.io-index".crossbeam-channel."0.5.2" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "dashmap" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".dashmap."4.0.2" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "fnv" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".fnv."1.0.7" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "dashmap" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".dashmap."4.0.2" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "fnv" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".fnv."1.0.7" { inherit profileName; };
      futures_channel = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-channel."0.3.21" { inherit profileName; };
      futures_executor = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-executor."0.3.21" { inherit profileName; };
      futures_util = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-util."0.3.21" { inherit profileName; };
@ -2649,8 +2679,8 @@ in
      pin_project = rustPackages."registry+https://github.com/rust-lang/crates.io-index".pin-project."1.0.10" { inherit profileName; };
      rand = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand."0.8.5" { inherit profileName; };
      thiserror = rustPackages."registry+https://github.com/rust-lang/crates.io-index".thiserror."1.0.30" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "tokio" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio."1.17.0" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "tokio_stream" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio-stream."0.1.8" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "tokio" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio."1.17.0" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "tokio_stream" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio-stream."0.1.8" { inherit profileName; };
    };
  });
  
@ -3216,7 +3246,7 @@ in
      [ "getrandom" ]
      [ "libc" ]
      [ "rand_chacha" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "small_rng")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "small_rng")
      [ "std" ]
      [ "std_rng" ]
    ];
@ -3308,27 +3338,27 @@ in
    registry = "registry+https://github.com/rust-lang/crates.io-index";
    src = fetchCratesIo { inherit name version; sha256 = "1a11647b6b25ff05a515cb92c365cec08801e83423a235b51e231e1808747286"; };
    features = builtins.concatLists [
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "aho-corasick")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "default")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "memchr")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf-cache")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf-dfa")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf-inline")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf-literal")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "aho-corasick")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "default")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "memchr")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf-cache")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf-dfa")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf-inline")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "perf-literal")
      [ "std" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-age")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-bool")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-case")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-gencat")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-perl")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-script")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-segment")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-age")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-bool")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-case")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-gencat")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-perl")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-script")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "unicode-segment")
    ];
    dependencies = {
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "aho_corasick" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".aho-corasick."0.7.18" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "memchr" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".memchr."2.4.1" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "aho_corasick" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".aho-corasick."0.7.18" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "memchr" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".memchr."2.4.1" { inherit profileName; };
      regex_syntax = rustPackages."registry+https://github.com/rust-lang/crates.io-index".regex-syntax."0.6.25" { inherit profileName; };
    };
  });
@ -3851,7 +3881,7 @@ in
    ];
    dependencies = {
      bitflags = rustPackages."registry+https://github.com/rust-lang/crates.io-index".bitflags."1.3.2" { inherit profileName; };
-      ${ if hostPlatform.parsed.kernel.name == "android" || hostPlatform.parsed.kernel.name == "linux" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.119" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "linux" || hostPlatform.parsed.kernel.name == "android" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.119" { inherit profileName; };
      ${ if !(hostPlatform.parsed.kernel.name == "linux" || hostPlatform.parsed.kernel.name == "android") then "parking_lot" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".parking_lot."0.11.2" { inherit profileName; };
      ${ if !(hostPlatform.parsed.kernel.name == "linux" || hostPlatform.parsed.kernel.name == "android") then "parking_lot_core" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".parking_lot_core."0.8.5" { inherit profileName; };
      static_init_macro = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".static_init_macro."1.0.2" { profileName = "__noProfile"; };
@ -4077,8 +4107,8 @@ in
      [ "bytes" ]
      [ "default" ]
      [ "fs" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "full")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "io-std")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "full")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "io-std")
      [ "io-util" ]
      [ "libc" ]
      [ "macros" ]
@ -4087,8 +4117,8 @@ in
      [ "net" ]
      [ "num_cpus" ]
      [ "once_cell" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "parking_lot")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "process")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "parking_lot")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "process")
      [ "rt" ]
      [ "rt-multi-thread" ]
      [ "signal" ]
@ -4106,7 +4136,7 @@ in
      mio = rustPackages."registry+https://github.com/rust-lang/crates.io-index".mio."0.8.1" { inherit profileName; };
      num_cpus = rustPackages."registry+https://github.com/rust-lang/crates.io-index".num_cpus."1.13.1" { inherit profileName; };
      once_cell = rustPackages."registry+https://github.com/rust-lang/crates.io-index".once_cell."1.10.0" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "parking_lot" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".parking_lot."0.12.0" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "parking_lot" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".parking_lot."0.12.0" { inherit profileName; };
      pin_project_lite = rustPackages."registry+https://github.com/rust-lang/crates.io-index".pin-project-lite."0.2.8" { inherit profileName; };
      ${ if hostPlatform.isUnix then "signal_hook_registry" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".signal-hook-registry."1.4.0" { inherit profileName; };
      socket2 = rustPackages."registry+https://github.com/rust-lang/crates.io-index".socket2."0.4.4" { inherit profileName; };
@ -4168,7 +4198,7 @@ in
    src = fetchCratesIo { inherit name version; sha256 = "50145484efff8818b5ccd256697f36863f587da82cf8b409c53adf1e840798e3"; };
    features = builtins.concatLists [
      [ "default" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "net")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "net")
      [ "time" ]
    ];
    dependencies = {
@ -4304,24 +4334,24 @@ in
    src = fetchCratesIo { inherit name version; sha256 = "9a89fd63ad6adf737582df5db40d286574513c69a11dac5214dc3b5603d6713e"; };
    features = builtins.concatLists [
      [ "__common" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "balance")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "balance")
      [ "buffer" ]
      [ "default" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "discover")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "discover")
      [ "futures-core" ]
      [ "futures-util" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "indexmap")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "limit")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "load")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "indexmap")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "limit")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "load")
      [ "log" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "make")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "make")
      [ "pin-project" ]
      [ "pin-project-lite" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "rand")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "ready-cache")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "rand")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "ready-cache")
      (lib.optional (rootFeatures' ? "garage") "retry")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "slab")
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "timeout")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "slab")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "timeout")
      [ "tokio" ]
      [ "tokio-util" ]
      [ "tracing" ]
@ -4330,11 +4360,11 @@ in
    dependencies = {
      futures_core = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-core."0.3.21" { inherit profileName; };
      futures_util = rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures-util."0.3.21" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "indexmap" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".indexmap."1.8.0" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "indexmap" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".indexmap."1.8.0" { inherit profileName; };
      pin_project = rustPackages."registry+https://github.com/rust-lang/crates.io-index".pin-project."1.0.10" { inherit profileName; };
      pin_project_lite = rustPackages."registry+https://github.com/rust-lang/crates.io-index".pin-project-lite."0.2.8" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "rand" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand."0.8.5" { inherit profileName; };
-      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "slab" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".slab."0.4.5" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "rand" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".rand."0.8.5" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web" then "slab" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".slab."0.4.5" { inherit profileName; };
      tokio = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio."1.17.0" { inherit profileName; };
      tokio_util = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio-util."0.7.0" { inherit profileName; };
      tower_layer = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tower-layer."0.3.1" { inherit profileName; };
@ -4761,7 +4791,7 @@ in
      [ "std" ]
      [ "synchapi" ]
      [ "sysinfoapi" ]
-      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "threadpoollegacyapiset")
+      (lib.optional (rootFeatures' ? "garage" || rootFeatures' ? "garage_admin" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_block" || rootFeatures' ? "garage_model" || rootFeatures' ? "garage_rpc" || rootFeatures' ? "garage_table" || rootFeatures' ? "garage_web") "threadpoollegacyapiset")
      [ "timezoneapi" ]
      [ "winbase" ]
      [ "wincon" ]
@ -4821,9 +4851,9 @@ in
      [ "default" ]
    ];
    dependencies = {
-      ${ if hostPlatform.config == "aarch64-pc-windows-msvc" || hostPlatform.config == "aarch64-uwp-windows-msvc" then "windows_aarch64_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_aarch64_msvc."0.32.0" { inherit profileName; };
+      ${ if hostPlatform.config == "aarch64-uwp-windows-msvc" || hostPlatform.config == "aarch64-pc-windows-msvc" then "windows_aarch64_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_aarch64_msvc."0.32.0" { inherit profileName; };
      ${ if hostPlatform.config == "i686-uwp-windows-gnu" || hostPlatform.config == "i686-pc-windows-gnu" then "windows_i686_gnu" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_i686_gnu."0.32.0" { inherit profileName; };
-      ${ if hostPlatform.config == "i686-pc-windows-msvc" || hostPlatform.config == "i686-uwp-windows-msvc" then "windows_i686_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_i686_msvc."0.32.0" { inherit profileName; };
+      ${ if hostPlatform.config == "i686-uwp-windows-msvc" || hostPlatform.config == "i686-pc-windows-msvc" then "windows_i686_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_i686_msvc."0.32.0" { inherit profileName; };
      ${ if hostPlatform.config == "x86_64-pc-windows-gnu" || hostPlatform.config == "x86_64-uwp-windows-gnu" then "windows_x86_64_gnu" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_x86_64_gnu."0.32.0" { inherit profileName; };
      ${ if hostPlatform.config == "x86_64-uwp-windows-msvc" || hostPlatform.config == "x86_64-pc-windows-msvc" then "windows_x86_64_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_x86_64_msvc."0.32.0" { inherit profileName; };
    };
--- a/src/api/Cargo.toml
+++ b/src/api/Cargo.toml
@ -16,6 +16,7 @@ path = "lib.rs"
 [dependencies]
 garage_model = { version = "0.7.0", path = "../model" }
 garage_table = { version = "0.7.0", path = "../table" }
+garage_block = { version = "0.7.0", path = "../block" }
 garage_util = { version = "0.7.0", path = "../util" }

 base64 = "0.13"
--- a/src/api/s3_put.rs
+++ b/src/api/s3_put.rs
@ -14,7 +14,7 @@ use garage_util::data::*;
 use garage_util::error::Error as GarageError;
 use garage_util::time::*;

-use garage_model::block::INLINE_THRESHOLD;
+use garage_block::manager::INLINE_THRESHOLD;
 use garage_model::block_ref_table::*;
 use garage_model::garage::Garage;
 use garage_model::key_table::Key;
--- a/src/block/Cargo.toml
+++ b/src/block/Cargo.toml
@ -0,0 +1,38 @@
+[package]
+name = "garage_block"
+version = "0.7.0"
+authors = ["Alex Auvolat <alex@adnab.me>"]
+edition = "2018"
+license = "AGPL-3.0"
+description = "Block manager for the Garage object store"
+repository = "https://git.deuxfleurs.fr/Deuxfleurs/garage"
+readme = "../../README.md"
+
+[lib]
+path = "lib.rs"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+garage_rpc = { version = "0.7.0", path = "../rpc" }
+garage_util = { version = "0.7.0", path = "../util" }
+garage_table = { version = "0.7.0", path = "../table" }
+
+opentelemetry = "0.17"
+
+async-trait = "0.1.7"
+bytes = "1.0"
+hex = "0.4"
+tracing = "0.1.30"
+rand = "0.8"
+zstd = { version = "0.9", default-features = false }
+
+sled = "0.34"
+
+rmp-serde = "0.15"
+serde = { version = "1.0", default-features = false, features = ["derive", "rc"] }
+serde_bytes = "0.11"
+
+futures = "0.3"
+futures-util = "0.3"
+tokio = { version = "1.0", default-features = false, features = ["rt", "rt-multi-thread", "io-util", "net", "time", "macros", "sync", "signal", "fs"] }
--- a/src/block/block.rs
+++ b/src/block/block.rs
@ -0,0 +1,81 @@
+use serde::{Deserialize, Serialize};
+use zstd::stream::{decode_all as zstd_decode, Encoder};
+
+use garage_util::data::*;
+use garage_util::error::*;
+
+/// A possibly compressed block of data
+#[derive(Debug, Serialize, Deserialize)]
+pub enum DataBlock {
+	/// Uncompressed data
+	Plain(#[serde(with = "serde_bytes")] Vec<u8>),
+	/// Data compressed with zstd
+	Compressed(#[serde(with = "serde_bytes")] Vec<u8>),
+}
+
+impl DataBlock {
+	/// Query whether this block is compressed
+	pub fn is_compressed(&self) -> bool {
+		matches!(self, DataBlock::Compressed(_))
+	}
+
+	/// Get the inner, possibly compressed buffer. You should probably use [`DataBlock::verify_get`]
+	/// instead
+	pub fn inner_buffer(&self) -> &[u8] {
+		use DataBlock::*;
+		let (Plain(ref res) | Compressed(ref res)) = self;
+		res
+	}
+
+	/// Get the buffer, possibly decompressing it, and verify it's integrity.
+	/// For Plain block, data is compared to hash, for Compressed block, zstd checksumming system
+	/// is used instead.
+	pub fn verify_get(self, hash: Hash) -> Result<Vec<u8>, Error> {
+		match self {
+			DataBlock::Plain(data) => {
+				if blake2sum(&data) == hash {
+					Ok(data)
+				} else {
+					Err(Error::CorruptData(hash))
+				}
+			}
+			DataBlock::Compressed(data) => {
+				zstd_decode(&data[..]).map_err(|_| Error::CorruptData(hash))
+			}
+		}
+	}
+
+	/// Verify data integrity. Allocate less than [`DataBlock::verify_get`] and don't consume self, but
+	/// does not return the buffer content.
+	pub fn verify(&self, hash: Hash) -> Result<(), Error> {
+		match self {
+			DataBlock::Plain(data) => {
+				if blake2sum(data) == hash {
+					Ok(())
+				} else {
+					Err(Error::CorruptData(hash))
+				}
+			}
+			DataBlock::Compressed(data) => zstd::stream::copy_decode(&data[..], std::io::sink())
+				.map_err(|_| Error::CorruptData(hash)),
+		}
+	}
+
+	pub fn from_buffer(data: Vec<u8>, level: Option<i32>) -> DataBlock {
+		if let Some(level) = level {
+			if let Ok(data) = zstd_encode(&data[..], level) {
+				return DataBlock::Compressed(data);
+			}
+		}
+		DataBlock::Plain(data)
+	}
+}
+
+fn zstd_encode<R: std::io::Read>(mut source: R, level: i32) -> std::io::Result<Vec<u8>> {
+	let mut result = Vec::<u8>::new();
+	let mut encoder = Encoder::new(&mut result, level)?;
+	encoder.include_checksum(true)?;
+	std::io::copy(&mut source, &mut encoder)?;
+	encoder.finish()?;
+	Ok(result)
+}
--- a/src/block/lib.rs
+++ b/src/block/lib.rs
@ -0,0 +1,8 @@
+#[macro_use]
+extern crate tracing;
+
+pub mod manager;
+
+mod block;
+mod metrics;
+mod rc;
--- a/src/block/manager.rs
+++ b/src/block/manager.rs
@ -3,10 +3,8 @@ use std::path::{Path, PathBuf};
 use std::sync::Arc;
 use std::time::Duration;

-use arc_swap::ArcSwapOption;
 use async_trait::async_trait;
 use serde::{Deserialize, Serialize};
-use zstd::stream::{decode_all as zstd_decode, Encoder};

 use futures::future::*;
 use futures::select;
@ -31,15 +29,13 @@ use garage_rpc::*;

 use garage_table::replication::{TableReplication, TableShardedReplication};

-use crate::block_metrics::*;
-use crate::block_ref_table::*;
-use crate::garage::Garage;
+use crate::block::*;
+use crate::metrics::*;
+use crate::rc::*;

 /// Size under which data will be stored inlined in database instead of as files
 pub const INLINE_THRESHOLD: usize = 3072;

-pub const BACKGROUND_TRANQUILITY: u32 = 2;
-
 // Timeout for RPCs that read and write blocks to remote nodes
 const BLOCK_RW_TIMEOUT: Duration = Duration::from_secs(30);
 // Timeout for RPCs that ask other nodes whether they need a copy
@ -54,7 +50,7 @@ const RESYNC_RETRY_DELAY: Duration = Duration::from_secs(60);
 // The delay between the moment when the reference counter
 // drops to zero, and the moment where we allow ourselves
 // to delete the block locally.
-const BLOCK_GC_DELAY: Duration = Duration::from_secs(600);
+pub(crate) const BLOCK_GC_DELAY: Duration = Duration::from_secs(600);

 /// RPC messages used to share blocks of data between nodes
 #[derive(Debug, Serialize, Deserialize)]
@ -74,73 +70,6 @@ pub enum BlockRpc {
 	NeedBlockReply(bool),
 }

-/// A possibly compressed block of data
-#[derive(Debug, Serialize, Deserialize)]
-pub enum DataBlock {
-	/// Uncompressed data
-	Plain(#[serde(with = "serde_bytes")] Vec<u8>),
-	/// Data compressed with zstd
-	Compressed(#[serde(with = "serde_bytes")] Vec<u8>),
-}
-
-impl DataBlock {
-	/// Query whether this block is compressed
-	pub fn is_compressed(&self) -> bool {
-		matches!(self, DataBlock::Compressed(_))
-	}
-
-	/// Get the inner, possibly compressed buffer. You should probably use [`DataBlock::verify_get`]
-	/// instead
-	pub fn inner_buffer(&self) -> &[u8] {
-		use DataBlock::*;
-		let (Plain(ref res) | Compressed(ref res)) = self;
-		res
-	}
-
-	/// Get the buffer, possibly decompressing it, and verify it's integrity.
-	/// For Plain block, data is compared to hash, for Compressed block, zstd checksumming system
-	/// is used instead.
-	pub fn verify_get(self, hash: Hash) -> Result<Vec<u8>, Error> {
-		match self {
-			DataBlock::Plain(data) => {
-				if blake2sum(&data) == hash {
-					Ok(data)
-				} else {
-					Err(Error::CorruptData(hash))
-				}
-			}
-			DataBlock::Compressed(data) => {
-				zstd_decode(&data[..]).map_err(|_| Error::CorruptData(hash))
-			}
-		}
-	}
-
-	/// Verify data integrity. Allocate less than [`DataBlock::verify_get`] and don't consume self, but
-	/// does not return the buffer content.
-	pub fn verify(&self, hash: Hash) -> Result<(), Error> {
-		match self {
-			DataBlock::Plain(data) => {
-				if blake2sum(data) == hash {
-					Ok(())
-				} else {
-					Err(Error::CorruptData(hash))
-				}
-			}
-			DataBlock::Compressed(data) => zstd::stream::copy_decode(&data[..], std::io::sink())
-				.map_err(|_| Error::CorruptData(hash)),
-		}
-	}
-
-	pub fn from_buffer(data: Vec<u8>, level: Option<i32>) -> DataBlock {
-		if let Some(level) = level {
-			if let Ok(data) = zstd_encode(&data[..], level) {
-				return DataBlock::Compressed(data);
-			}
-		}
-		DataBlock::Plain(data)
-	}
-}
-
 impl Rpc for BlockRpc {
 	type Response = Result<BlockRpc, Error>;
 }
@ -152,9 +81,12 @@ pub struct BlockManager {
 	/// Directory in which block are stored
 	pub data_dir: PathBuf,

+	compression_level: Option<i32>,
+	background_tranquility: u32,
+
 	mutation_lock: Mutex<BlockManagerLocked>,

-	rc: sled::Tree,
+	rc: BlockRc,

 	resync_queue: SledCountedTree,
 	resync_notify: Notify,
@ -162,7 +94,6 @@ pub struct BlockManager {

 	system: Arc<System>,
 	endpoint: Arc<Endpoint<BlockRpc, Self>>,
-	pub(crate) garage: ArcSwapOption<Garage>,

 	metrics: BlockManagerMetrics,
 }
@ -176,12 +107,15 @@ impl BlockManager {
 	pub fn new(
 		db: &sled::Db,
 		data_dir: PathBuf,
+		compression_level: Option<i32>,
+		background_tranquility: u32,
 		replication: TableShardedReplication,
 		system: Arc<System>,
 	) -> Arc<Self> {
 		let rc = db
 			.open_tree("block_local_rc")
 			.expect("Unable to open block_local_rc tree");
+		let rc = BlockRc::new(rc);

 		let resync_queue = db
 			.open_tree("block_local_resync_queue")
@ -204,6 +138,8 @@ impl BlockManager {
 		let block_manager = Arc::new(Self {
 			replication,
 			data_dir,
+			compression_level,
+			background_tranquility,
 			mutation_lock: Mutex::new(manager_locked),
 			rc,
 			resync_queue,
@ -211,11 +147,12 @@ impl BlockManager {
 			resync_errors,
 			system,
 			endpoint,
-			garage: ArcSwapOption::from(None),
 			metrics,
 		});
 		block_manager.endpoint.set_handler(block_manager.clone());

+		block_manager.clone().spawn_background_worker();
+
 		block_manager
 	}

@ -257,14 +194,7 @@ impl BlockManager {
 	/// Send block to nodes that should have it
 	pub async fn rpc_put_block(&self, hash: Hash, data: Vec<u8>) -> Result<(), Error> {
 		let who = self.replication.write_nodes(&hash);
-		let compression_level = self
-			.garage
-			.load()
-			.as_ref()
-			.unwrap()
-			.config
-			.compression_level;
-		let data = DataBlock::from_buffer(data, compression_level);
+		let data = DataBlock::from_buffer(data, self.compression_level);
 		self.system
 			.rpc
 			.try_call_many(
@ -286,18 +216,10 @@ impl BlockManager {
 	/// to fix any mismatch between the two.
 	pub async fn repair_data_store(&self, must_exit: &watch::Receiver<bool>) -> Result<(), Error> {
 		// 1. Repair blocks from RC table.
-		let garage = self.garage.load_full().unwrap();
-		let mut last_hash = None;
-		for (i, entry) in garage.block_ref_table.data.store.iter().enumerate() {
-			let (_k, v_bytes) = entry?;
-			let block_ref = rmp_serde::decode::from_read_ref::<_, BlockRef>(v_bytes.as_ref())?;
-			if Some(&block_ref.block) == last_hash.as_ref() {
-				continue;
-			}
-			if !block_ref.deleted.get() {
-				last_hash = Some(block_ref.block);
-				self.put_to_resync(&block_ref.block, Duration::from_secs(0))?;
-			}
+		for (i, entry) in self.rc.rc.iter().enumerate() {
+			let (hash, _) = entry?;
+			let hash = Hash::try_from(&hash[..]).unwrap();
+			self.put_to_resync(&hash, Duration::from_secs(0))?;
 			if i & 0xFF == 0 && *must_exit.borrow() {
 				return Ok(());
 			}
@ -309,7 +231,10 @@ impl BlockManager {
 		// so that we can offload them if necessary and then delete them locally.
 		self.for_each_file(
 			(),
-			move |_, hash| async move { self.put_to_resync(&hash, Duration::from_secs(0)) },
+			move |_, hash| async move {
+				self.put_to_resync(&hash, Duration::from_secs(0))
+					.map_err(Into::into)
+			},
 			must_exit,
 		)
 		.await
@ -342,7 +267,7 @@ impl BlockManager {

 	/// Get number of items in the refcount table
 	pub fn rc_len(&self) -> usize {
-		self.rc.len()
+		self.rc.rc.len()
 	}

 	//// ----- Managing the reference counter ----
@ -350,11 +275,7 @@ impl BlockManager {
 	/// Increment the number of time a block is used, putting it to resynchronization if it is
 	/// required, but not known
 	pub fn block_incref(&self, hash: &Hash) -> Result<(), Error> {
-		let old_rc = self
-			.rc
-			.fetch_and_update(&hash, |old| RcEntry::parse_opt(old).increment().serialize())?;
-		let old_rc = RcEntry::parse_opt(old_rc);
-		if old_rc.is_zero() {
+		if self.rc.block_incref(hash)? {
 			// When the reference counter is incremented, there is
 			// normally a node that is responsible for sending us the
 			// data of the block. However that operation may fail,
@ -368,35 +289,17 @@ impl BlockManager {

 	/// Decrement the number of time a block is used
 	pub fn block_decref(&self, hash: &Hash) -> Result<(), Error> {
-		let new_rc = self
-			.rc
-			.update_and_fetch(&hash, |old| RcEntry::parse_opt(old).decrement().serialize())?;
-		let new_rc = RcEntry::parse_opt(new_rc);
-		if let RcEntry::Deletable { .. } = new_rc {
+		if self.rc.block_decref(hash)? {
+			// When the RC is decremented, it might drop to zero,
+			// indicating that we don't need the block.
+			// There is a delay before we garbage collect it;
+			// make sure that it is handled in the resync loop
+			// after that delay has passed.
 			self.put_to_resync(hash, BLOCK_GC_DELAY + Duration::from_secs(10))?;
 		}
 		Ok(())
 	}

-	/// Read a block's reference count
-	fn get_block_rc(&self, hash: &Hash) -> Result<RcEntry, Error> {
-		Ok(RcEntry::parse_opt(self.rc.get(hash.as_ref())?))
-	}
-
-	/// Delete an entry in the RC table if it is deletable and the
-	/// deletion time has passed
-	fn clear_deleted_block_rc(&self, hash: &Hash) -> Result<(), Error> {
-		let now = now_msec();
-		self.rc.update_and_fetch(&hash, |rcval| {
-			let updated = match RcEntry::parse_opt(rcval) {
-				RcEntry::Deletable { at_time } if now > at_time => RcEntry::Absent,
-				v => v,
-			};
-			updated.serialize()
-		})?;
-		Ok(())
-	}
-
 	// ---- Reading and writing blocks locally ----

 	/// Write a block to disk
@ -510,7 +413,78 @@ impl BlockManager {

 	// ---- Resync loop ----

-	pub fn spawn_background_worker(self: Arc<Self>) {
+	// This part manages a queue of blocks that need to be
+	// "resynchronized", i.e. that need to have a check that
+	// they are at present if we need them, or that they are
+	// deleted once the garbage collection delay has passed.
+	//
+	// Here are some explanations on how the resync queue works.
+	// There are two Sled trees that are used to have information
+	// about the status of blocks that need to be resynchronized:
+	//
+	// - resync_queue: a tree that is ordered first by a timestamp
+	//   (in milliseconds since Unix epoch) that is the time at which
+	//   the resync must be done, and second by block hash.
+	//   The key in this tree is just:
+	//       concat(timestamp (8 bytes), hash (32 bytes))
+	//   The value is the same 32-byte hash.
+	//
+	// - resync_errors: a tree that indicates for each block
+	//   if the last resync resulted in an error, and if so,
+	//   the following two informations (see the ErrorCounter struct):
+	//   - how many consecutive resync errors for this block?
+	//   - when was the last try?
+	//   These two informations are used to implement an
+	//   exponential backoff retry strategy.
+	//   The key in this tree is the 32-byte hash of the block,
+	//   and the value is the encoded ErrorCounter value.
+	//
+	// We need to have these two trees, because the resync queue
+	// is not just a queue of items to process, but a set of items
+	// that are waiting a specific delay until we can process them
+	// (the delay being necessary both internally for the exponential
+	// backoff strategy, and exposed as a parameter when adding items
+	// to the queue, e.g. to wait until the GC delay has passed).
+	// This is why we need one tree ordered by time, and one
+	// ordered by identifier of item to be processed (block hash).
+	//
+	// When the worker wants to process an item it takes from
+	// resync_queue, it checks in resync_errors that if there is an
+	// exponential back-off delay to await, it has passed before we
+	// process the item. If not, the item in the queue is skipped
+	// (but added back for later processing after the time of the
+	// delay).
+	//
+	// An alternative that would have seemed natural is to
+	// only add items to resync_queue with a processing time that is
+	// after the delay, but there are several issues with this:
+	// - This requires to synchronize updates to resync_queue and
+	//   resync_errors (with the current model, there is only one thread,
+	//   the worker thread, that accesses resync_errors,
+	//   so no need to synchronize) by putting them both in a lock.
+	//   This would mean that block_incref might need to take a lock
+	//   before doing its thing, meaning it has much more chances of
+	//   not completing successfully if something bad happens to Garage.
+	//   Currently Garage is not able to recover from block_incref that
+	//   doesn't complete successfully, because it is necessary to ensure
+	//   the consistency between the state of the block manager and
+	//   information in the BlockRef table.
+	// - If a resync fails, we put that block in the resync_errors table,
+	//   and also add it back to resync_queue to be processed after
+	//   the exponential back-off delay,
+	//   but maybe the block is already scheduled to be resynced again
+	//   at another time that is before the exponential back-off delay,
+	//   and we have no way to check that easily. This means that
+	//   in all cases, we need to check the resync_errors table
+	//   in the resync loop at the time when a block is popped from
+	//   the resync_queue.
+	// Overall, the current design is therefore simpler and more robust
+	// because it tolerates inconsistencies between the resync_queue
+	// and resync_errors table (items being scheduled in resync_queue
+	// for times that are earlier than the exponential back-off delay
+	// is a natural condition that is handled properly).
+
+	fn spawn_background_worker(self: Arc<Self>) {
 		// Launch a background workers for background resync loop processing
 		let background = self.system.background.clone();
 		tokio::spawn(async move {
@ -521,12 +495,12 @@ impl BlockManager {
 		});
 	}

-	fn put_to_resync(&self, hash: &Hash, delay: Duration) -> Result<(), Error> {
+	fn put_to_resync(&self, hash: &Hash, delay: Duration) -> Result<(), sled::Error> {
 		let when = now_msec() + delay.as_millis() as u64;
 		self.put_to_resync_at(hash, when)
 	}

-	fn put_to_resync_at(&self, hash: &Hash, when: u64) -> Result<(), Error> {
+	fn put_to_resync_at(&self, hash: &Hash, when: u64) -> Result<(), sled::Error> {
 		trace!("Put resync_queue: {} {:?}", when, hash);
 		let mut key = u64::to_be_bytes(when).to_vec();
 		key.extend(hash.as_ref());
@ -541,7 +515,7 @@ impl BlockManager {
 		while !*must_exit.borrow() {
 			match self.resync_iter(&mut must_exit).await {
 				Ok(true) => {
-					tranquilizer.tranquilize(BACKGROUND_TRANQUILITY).await;
+					tranquilizer.tranquilize(self.background_tranquility).await;
 				}
 				Ok(false) => {
 					tranquilizer.reset();
@ -561,7 +535,14 @@ impl BlockManager {
 		}
 	}

-	async fn resync_iter(&self, must_exit: &mut watch::Receiver<bool>) -> Result<bool, Error> {
+	// The result of resync_iter is:
+	// - Ok(true) -> a block was processed (successfully or not)
+	// - Ok(false) -> no block was processed, but we are ready for the next iteration
+	// - Err(_) -> a Sled error occurred when reading/writing from resync_queue/resync_errors
+	async fn resync_iter(
+		&self,
+		must_exit: &mut watch::Receiver<bool>,
+	) -> Result<bool, sled::Error> {
 		if let Some(first_pair_res) = self.resync_queue.iter().next() {
 			let (time_bytes, hash_bytes) = first_pair_res?;

@ -580,6 +561,8 @@ impl BlockManager {
 						self.put_to_resync_at(&hash, ec.next_try())?;
 						// ec.next_try() > now >= time_msec, so this remove
 						// is not removing the one we added just above
+						// (we want to do the remove after the insert to ensure
+						// that the item is not lost if we crash in-between)
 						self.resync_queue.remove(time_bytes)?;
 						return Ok(false);
 					}
@ -639,7 +622,15 @@ impl BlockManager {
 				Ok(false)
 			}
 		} else {
+			// Here we wait either for a notification that an item has been
+			// added to the queue, or for a constant delay of 10 secs to expire.
+			// The delay avoids a race condition where the notification happens
+			// between the time we checked the queue and the first poll
+			// to resync_notify.notified(): if that happens, we'll just loop
+			// back 10 seconds later, which is fine.
+			let delay = tokio::time::sleep(Duration::from_secs(10));
 			select! {
+				_ = delay.fuse() => {},
 				_ = self.resync_notify.notified().fuse() => {},
 				_ = must_exit.changed().fuse() => {},
 			}
@ -740,7 +731,7 @@ impl BlockManager {
 				.delete_if_unneeded(hash, self)
 				.await?;

-			self.clear_deleted_block_rc(hash)?;
+			self.rc.clear_deleted_block_rc(hash)?;
 		}

 		if needed.is_nonzero() && !exists {
@ -854,7 +845,7 @@ impl BlockManagerLocked {
 		mgr: &BlockManager,
 	) -> Result<BlockStatus, Error> {
 		let exists = mgr.is_block_compressed(hash).await.is_ok();
-		let needed = mgr.get_block_rc(hash)?;
+		let needed = mgr.rc.get_block_rc(hash)?;

 		Ok(BlockStatus { exists, needed })
 	}
@ -950,107 +941,6 @@ impl BlockManagerLocked {
 	}
 }

-/// Describes the state of the reference counter for a block
-#[derive(Clone, Copy, Debug)]
-enum RcEntry {
-	/// Present: the block has `count` references, with `count` > 0.
-	///
-	/// This is stored as u64::to_be_bytes(count)
-	Present { count: u64 },
-
-	/// Deletable: the block has zero references, and can be deleted
-	/// once time (returned by now_msec) is larger than at_time
-	/// (in millis since Unix epoch)
-	///
-	/// This is stored as [0u8; 8] followed by u64::to_be_bytes(at_time),
-	/// (this allows for the data format to be backwards compatible with
-	/// previous Garage versions that didn't have this intermediate state)
-	Deletable { at_time: u64 },
-
-	/// Absent: the block has zero references, and can be deleted
-	/// immediately
-	Absent,
-}
-
-impl RcEntry {
-	fn parse(bytes: &[u8]) -> Self {
-		if bytes.len() == 8 {
-			RcEntry::Present {
-				count: u64::from_be_bytes(bytes.try_into().unwrap()),
-			}
-		} else if bytes.len() == 16 {
-			RcEntry::Deletable {
-				at_time: u64::from_be_bytes(bytes[8..16].try_into().unwrap()),
-			}
-		} else {
-			panic!("Invalid RC entry: {:?}, database is corrupted. This is an error Garage is currently unable to recover from. Sorry, and also please report a bug.",
-				bytes
-			)
-		}
-	}
-
-	fn parse_opt<V: AsRef<[u8]>>(bytes: Option<V>) -> Self {
-		bytes
-			.map(|b| Self::parse(b.as_ref()))
-			.unwrap_or(Self::Absent)
-	}
-
-	fn serialize(self) -> Option<Vec<u8>> {
-		match self {
-			RcEntry::Present { count } => Some(u64::to_be_bytes(count).to_vec()),
-			RcEntry::Deletable { at_time } => {
-				Some([u64::to_be_bytes(0), u64::to_be_bytes(at_time)].concat())
-			}
-			RcEntry::Absent => None,
-		}
-	}
-
-	fn increment(self) -> Self {
-		let old_count = match self {
-			RcEntry::Present { count } => count,
-			_ => 0,
-		};
-		RcEntry::Present {
-			count: old_count + 1,
-		}
-	}
-
-	fn decrement(self) -> Self {
-		match self {
-			RcEntry::Present { count } => {
-				if count > 1 {
-					RcEntry::Present { count: count - 1 }
-				} else {
-					RcEntry::Deletable {
-						at_time: now_msec() + BLOCK_GC_DELAY.as_millis() as u64,
-					}
-				}
-			}
-			del => del,
-		}
-	}
-
-	fn is_zero(&self) -> bool {
-		matches!(self, RcEntry::Deletable { .. } | RcEntry::Absent)
-	}
-
-	fn is_nonzero(&self) -> bool {
-		!self.is_zero()
-	}
-
-	fn is_deletable(&self) -> bool {
-		match self {
-			RcEntry::Present { .. } => false,
-			RcEntry::Deletable { at_time } => now_msec() > *at_time,
-			RcEntry::Absent => true,
-		}
-	}
-
-	fn is_needed(&self) -> bool {
-		!self.is_deletable()
-	}
-}
-
 /// Counts the number of errors when resyncing a block,
 /// and the time of the last try.
 /// Used to implement exponential backoff.
@ -1096,12 +986,3 @@ impl ErrorCounter {
 		self.last_try + self.delay_msec()
 	}
 }
-
-fn zstd_encode<R: std::io::Read>(mut source: R, level: i32) -> std::io::Result<Vec<u8>> {
-	let mut result = Vec::<u8>::new();
-	let mut encoder = Encoder::new(&mut result, level)?;
-	encoder.include_checksum(true)?;
-	std::io::copy(&mut source, &mut encoder)?;
-	encoder.finish()?;
-	Ok(result)
-}
--- a/src/model/block_metrics.rs
+++ b/src/model/block_metrics.rs
--- a/src/block/rc.rs
+++ b/src/block/rc.rs
@ -0,0 +1,157 @@
+use std::convert::TryInto;
+
+use garage_util::data::*;
+use garage_util::error::*;
+use garage_util::time::*;
+
+use crate::manager::BLOCK_GC_DELAY;
+
+pub struct BlockRc {
+	pub(crate) rc: sled::Tree,
+}
+
+impl BlockRc {
+	pub(crate) fn new(rc: sled::Tree) -> Self {
+		Self { rc }
+	}
+
+	/// Increment the reference counter associated to a hash.
+	/// Returns true if the RC goes from zero to nonzero.
+	pub(crate) fn block_incref(&self, hash: &Hash) -> Result<bool, Error> {
+		let old_rc = self
+			.rc
+			.fetch_and_update(&hash, |old| RcEntry::parse_opt(old).increment().serialize())?;
+		let old_rc = RcEntry::parse_opt(old_rc);
+		Ok(old_rc.is_zero())
+	}
+
+	/// Decrement the reference counter associated to a hash.
+	/// Returns true if the RC is now zero.
+	pub(crate) fn block_decref(&self, hash: &Hash) -> Result<bool, Error> {
+		let new_rc = self
+			.rc
+			.update_and_fetch(&hash, |old| RcEntry::parse_opt(old).decrement().serialize())?;
+		let new_rc = RcEntry::parse_opt(new_rc);
+		Ok(matches!(new_rc, RcEntry::Deletable { .. }))
+	}
+
+	/// Read a block's reference count
+	pub(crate) fn get_block_rc(&self, hash: &Hash) -> Result<RcEntry, Error> {
+		Ok(RcEntry::parse_opt(self.rc.get(hash.as_ref())?))
+	}
+
+	/// Delete an entry in the RC table if it is deletable and the
+	/// deletion time has passed
+	pub(crate) fn clear_deleted_block_rc(&self, hash: &Hash) -> Result<(), Error> {
+		let now = now_msec();
+		self.rc.update_and_fetch(&hash, |rcval| {
+			let updated = match RcEntry::parse_opt(rcval) {
+				RcEntry::Deletable { at_time } if now > at_time => RcEntry::Absent,
+				v => v,
+			};
+			updated.serialize()
+		})?;
+		Ok(())
+	}
+}
+
+/// Describes the state of the reference counter for a block
+#[derive(Clone, Copy, Debug)]
+pub(crate) enum RcEntry {
+	/// Present: the block has `count` references, with `count` > 0.
+	///
+	/// This is stored as u64::to_be_bytes(count)
+	Present { count: u64 },
+
+	/// Deletable: the block has zero references, and can be deleted
+	/// once time (returned by now_msec) is larger than at_time
+	/// (in millis since Unix epoch)
+	///
+	/// This is stored as [0u8; 8] followed by u64::to_be_bytes(at_time),
+	/// (this allows for the data format to be backwards compatible with
+	/// previous Garage versions that didn't have this intermediate state)
+	Deletable { at_time: u64 },
+
+	/// Absent: the block has zero references, and can be deleted
+	/// immediately
+	Absent,
+}
+
+impl RcEntry {
+	fn parse(bytes: &[u8]) -> Self {
+		if bytes.len() == 8 {
+			RcEntry::Present {
+				count: u64::from_be_bytes(bytes.try_into().unwrap()),
+			}
+		} else if bytes.len() == 16 {
+			RcEntry::Deletable {
+				at_time: u64::from_be_bytes(bytes[8..16].try_into().unwrap()),
+			}
+		} else {
+			panic!("Invalid RC entry: {:?}, database is corrupted. This is an error Garage is currently unable to recover from. Sorry, and also please report a bug.",
+				bytes
+			)
+		}
+	}
+
+	fn parse_opt<V: AsRef<[u8]>>(bytes: Option<V>) -> Self {
+		bytes
+			.map(|b| Self::parse(b.as_ref()))
+			.unwrap_or(Self::Absent)
+	}
+
+	fn serialize(self) -> Option<Vec<u8>> {
+		match self {
+			RcEntry::Present { count } => Some(u64::to_be_bytes(count).to_vec()),
+			RcEntry::Deletable { at_time } => {
+				Some([u64::to_be_bytes(0), u64::to_be_bytes(at_time)].concat())
+			}
+			RcEntry::Absent => None,
+		}
+	}
+
+	fn increment(self) -> Self {
+		let old_count = match self {
+			RcEntry::Present { count } => count,
+			_ => 0,
+		};
+		RcEntry::Present {
+			count: old_count + 1,
+		}
+	}
+
+	fn decrement(self) -> Self {
+		match self {
+			RcEntry::Present { count } => {
+				if count > 1 {
+					RcEntry::Present { count: count - 1 }
+				} else {
+					RcEntry::Deletable {
+						at_time: now_msec() + BLOCK_GC_DELAY.as_millis() as u64,
+					}
+				}
+			}
+			del => del,
+		}
+	}
+
+	pub(crate) fn is_zero(&self) -> bool {
+		matches!(self, RcEntry::Deletable { .. } | RcEntry::Absent)
+	}
+
+	pub(crate) fn is_nonzero(&self) -> bool {
+		!self.is_zero()
+	}
+
+	pub(crate) fn is_deletable(&self) -> bool {
+		match self {
+			RcEntry::Present { .. } => false,
+			RcEntry::Deletable { at_time } => now_msec() > *at_time,
+			RcEntry::Absent => true,
+		}
+	}
+
+	pub(crate) fn is_needed(&self) -> bool {
+		!self.is_deletable()
+	}
+}
--- a/src/garage/server.rs
+++ b/src/garage/server.rs
@ -98,8 +98,7 @@ pub async fn run_server(config_file: PathBuf) -> Result<(), Error> {
 	// Await for netapp RPC system to end
 	run_system.await?;

-	// Break last reference cycles so that stuff can terminate properly
-	garage.break_reference_cycles();
+	// Drop all references so that stuff can terminate properly
 	drop(garage);

 	// Await for all background tasks to end
--- a/src/model/Cargo.toml
+++ b/src/model/Cargo.toml
@ -16,6 +16,7 @@ path = "lib.rs"
 [dependencies]
 garage_rpc = { version = "0.7.0", path = "../rpc" }
 garage_table = { version = "0.7.0", path = "../table" }
+garage_block = { version = "0.7.0", path = "../block" }
 garage_util = { version = "0.7.0", path = "../util" }
 garage_model_050 = { package = "garage_model", version = "0.5.1" }

--- a/src/model/block_ref_table.rs
+++ b/src/model/block_ref_table.rs
@ -6,7 +6,7 @@ use garage_util::data::*;
 use garage_table::crdt::Crdt;
 use garage_table::*;

-use crate::block::*;
+use garage_block::manager::*;

 #[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
 pub struct BlockRef {
@ -52,7 +52,8 @@ impl TableSchema for BlockRefTable {
 	type Filter = DeletedFilter;

 	fn updated(&self, old: Option<Self::E>, new: Option<Self::E>) {
-		let block = &old.as_ref().or_else(|| new.as_ref()).unwrap().block;
+		#[allow(clippy::or_fun_call)]
+		let block = &old.as_ref().or(new.as_ref()).unwrap().block;
 		let was_before = old.as_ref().map(|x| !x.deleted.get()).unwrap_or(false);
 		let is_after = new.as_ref().map(|x| !x.deleted.get()).unwrap_or(false);
 		if is_after && !was_before {
--- a/src/model/garage.rs
+++ b/src/model/garage.rs
@ -7,12 +7,12 @@ use garage_util::config::*;

 use garage_rpc::system::System;

+use garage_block::manager::*;
 use garage_table::replication::ReplicationMode;
 use garage_table::replication::TableFullReplication;
 use garage_table::replication::TableShardedReplication;
 use garage_table::*;

-use crate::block::*;
 use crate::block_ref_table::*;
 use crate::bucket_alias_table::*;
 use crate::bucket_table::*;
@ -86,8 +86,14 @@ impl Garage {
 		};

 		info!("Initialize block manager...");
-		let block_manager =
-			BlockManager::new(&db, config.data_dir.clone(), data_rep_param, system.clone());
+		let block_manager = BlockManager::new(
+			&db,
+			config.data_dir.clone(),
+			config.compression_level,
+			config.block_manager_background_tranquility,
+			data_rep_param,
+			system.clone(),
+		);

 		info!("Initialize block_ref_table...");
 		let block_ref_table = Table::new(
@ -136,7 +142,8 @@ impl Garage {
 		let key_table = Table::new(KeyTable, control_rep_param, system.clone(), &db);

 		info!("Initialize Garage...");
-		let garage = Arc::new(Self {
+
+		Arc::new(Self {
 			config,
 			db,
 			background,
@ -148,18 +155,7 @@ impl Garage {
 			object_table,
 			version_table,
 			block_ref_table,
-		});
-
-		info!("Start block manager background thread...");
-		garage.block_manager.garage.swap(Some(garage.clone()));
-		garage.block_manager.clone().spawn_background_worker();
-
-		garage
-	}
-
-	/// Use this for shutdown
-	pub fn break_reference_cycles(&self) {
-		self.block_manager.garage.swap(None);
+		})
 	}

 	pub fn bucket_helper(&self) -> helper::bucket::BucketHelper {
--- a/src/model/lib.rs
+++ b/src/model/lib.rs
@ -10,9 +10,6 @@ pub mod key_table;
 pub mod object_table;
 pub mod version_table;

-pub mod block;
-mod block_metrics;
-
 pub mod garage;
 pub mod helper;
 pub mod migrate;
--- a/src/util/config.rs
+++ b/src/util/config.rs
@ -23,6 +23,10 @@ pub struct Config {
 	#[serde(default = "default_block_size")]
 	pub block_size: usize,

+	/// Size of data blocks to save to disk
+	#[serde(default = "default_block_manager_background_tranquility")]
+	pub block_manager_background_tranquility: u32,
+
 	/// Replication mode. Supported values:
 	/// - none, 1 -> no replication
 	/// - 2 -> 2-way replication
@ -118,6 +122,9 @@ fn default_sled_flush_every_ms() -> u64 {
 fn default_block_size() -> usize {
 	1048576
 }
+fn default_block_manager_background_tranquility() -> u32 {
+	2
+}

 /// Read and parse configuration
 pub fn read_config(config_file: PathBuf) -> Result<Config, Error> {
Author	SHA1	Message	Date
Alex	ad9180ae29	Add lots of comments on how the resync queue works (I don't really want to change/refactor that code though)	2022-03-15 16:47:13 +01:00
Alex	eb0b3bd473	Clippy	2022-03-15 16:06:50 +01:00
Alex	23cf71a483	run cargo2nix	2022-03-15 12:32:17 +01:00
Alex	e5e23364be	Make background tranquility a configurable parameter	2022-03-15 12:31:23 +01:00
Alex	a70ef456e4	Move block RC code to separate `rc.rs`	2022-03-15 12:23:33 +01:00
Alex	12fd12fd6a	Move DataBlock out of manager.rs	2022-03-15 12:12:12 +01:00
Alex	a0de940b8a	Move block manager to separate module	2022-03-15 12:04:12 +01:00