build: fix detection of next rc version

Only Require either matching UID & GID OR matching Names.

If the 2 devices have a different Name => UID mapping, they can never be
totaly equal. Therefore when syncing we try matching the Name and fall
back to the UID. However when scanning for changes we currently require
both the Name & UID to match. This leads to forever having out of sync
files back and forth, or local additions when receive only.

This patch does not change the sending behavoir. It only change what we
decide is equal for exisiting files with mismapped Name => UID,

The added testcases show the change: Test 1,5,6 are the same as current.
Test 2,3 Are what change with this patch (from false to true). Test 4 is
a subset of test 2 they is currently special cased as true, which does
not chnage.

Co-authored-by: Jakob Borg <jakob@kastelo.net>

.github/ISSUE_TEMPLATE/01-feature.yml

@@ -1,6 +1,7 @@
 name: Feature request
 description: File a new feature request
 labels: ["enhancement", "needs-triage"]
+type: Feature
 body:
 
   - type: textarea

.github/ISSUE_TEMPLATE/02-bug.yml

@@ -1,6 +1,7 @@
 name: Bug report
 description: If you're actually looking for support instead, see "I need help / I have a question".
 labels: ["bug", "needs-triage"]
+type: Bug
 body:
   - type: markdown
     attributes:

.github/labeler.yml

@@ -0,0 +1,23 @@
+version: 1
+labels:
+
+- label: enhancement
+  title: ^feat\b
+
+- label: bug
+  title: ^fix\b
+
+- label: documentation
+  title: ^docs\b
+
+- label: chore
+  title: ^chore\b
+
+- label: chore
+  title: ^refactor\b
+
+- label: build
+  title: ^build\b
+
+- label: dependencies
+  title: ^build\(deps\)\b

.github/release.yml

@@ -0,0 +1,17 @@
+changelog:
+  exclude:
+    labels:
+      - dependencies
+
+  categories:
+    - title: Fixes
+      labels:
+        - bug
+
+    - title: Features
+      labels:
+        - enhancement
+
+    - title: Other
+      labels:
+        - '*'

.github/workflows/build-infra-dockers.yaml

@@ -21,7 +21,7 @@ jobs:
     name: Build and push Docker images
     if: github.repository == 'syncthing/syncthing'
     runs-on: ubuntu-latest
-    environment: release
+    environment: docker
     strategy:
       matrix:
         pkg:

.github/workflows/build-syncthing.yaml

@@ -3,6 +3,9 @@ name: Build Syncthing
 on:
   pull_request:
   push:
+    branches-ignore:
+      - release
+      - release-rc*
   workflow_call:
   workflow_dispatch:
 
@@ -86,26 +89,6 @@ jobs:
           LOKI_PASSWORD: ${{ secrets.LOKI_PASSWORD }}
           LOKI_LABELS: "go=${{ matrix.go }},runner=${{ matrix.runner }},repo=${{ github.repository }},ref=${{ github.ref }}"
 
-  #
-  # Meta checks for formatting, copyright, etc
-  #
-
-  correctness:
-    name: Check correctness
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: actions/setup-go@v5
-        with:
-          go-version: ${{ env.GO_VERSION }}
-          cache: false
-          check-latest: true
-
-      - name: Check correctness
-        run: |
-          go test -v ./meta
-
   #
   # The basic checks job is a virtual one that depends on the matrix tests,
   # the correctness checks, and various builds that we always do. This makes
@@ -120,7 +103,6 @@ jobs:
     runs-on: ubuntu-latest
     needs:
       - build-test
-      - correctness
       - package-linux
       - package-cross
       - package-source
@@ -194,7 +176,7 @@ jobs:
 
   codesign-windows:
     name: Codesign for Windows
-    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-') || startsWith(github.ref, 'refs/tags/v'))
+    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release-nightly' || startsWith(github.ref, 'refs/tags/v'))
     environment: release
     runs-on: windows-latest
     needs:
@@ -301,7 +283,7 @@ jobs:
 
   package-macos:
     name: Package for macOS
-    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-') || startsWith(github.ref, 'refs/tags/v'))
+    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release-nightly' || startsWith(github.ref, 'refs/tags/v'))
     environment: release
     runs-on: macos-latest
     steps:
@@ -401,7 +383,7 @@ jobs:
 
   notarize-macos:
     name: Notarize for macOS
-    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-') || startsWith(github.ref, 'refs/tags/v'))
+    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release-nightly' || startsWith(github.ref, 'refs/tags/v'))
     environment: release
     needs:
       - package-macos
@@ -545,7 +527,7 @@ jobs:
 
   sign-for-upgrade:
     name: Sign for upgrade
-    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-')  || startsWith(github.ref, 'refs/tags/v'))
+    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release-nightly' || startsWith(github.ref, 'refs/tags/v'))
     environment: release
     needs:
       - codesign-windows
@@ -734,7 +716,7 @@ jobs:
           RCLONE_CONFIG_OBJSTORE_REGION: ${{ secrets.S3_REGION }}
           RCLONE_CONFIG_OBJSTORE_ACL: public-read
         with:
-          args: sync packages objstore:${{ secrets.S3_BUCKET }}/nightly
+          args: sync -v --no-update-modtime packages objstore:nightly
 
   #
   # Push release artifacts to Spaces
@@ -744,6 +726,8 @@ jobs:
     name: Publish release files
     if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/tags/v'))
     environment: release
+    permissions:
+      contents: write
     needs:
       - sign-for-upgrade
       - package-debian
@@ -788,7 +772,7 @@ jobs:
           RCLONE_CONFIG_OBJSTORE_REGION: ${{ secrets.S3_REGION }}
           RCLONE_CONFIG_OBJSTORE_ACL: public-read
         with:
-          args: sync packages objstore:${{ secrets.S3_BUCKET }}/release/${{ env.VERSION }}
+          args: sync -v --no-update-modtime packages objstore:release/${{ env.VERSION }}
 
       - name: Push to object store (latest)
         uses: docker://docker.io/rclone/rclone:latest
@@ -801,7 +785,43 @@ jobs:
           RCLONE_CONFIG_OBJSTORE_REGION: ${{ secrets.S3_REGION }}
           RCLONE_CONFIG_OBJSTORE_ACL: public-read
         with:
-          args: sync objstore:${{ secrets.S3_BUCKET }}/release/${{ env.VERSION }} objstore:${{ secrets.S3_BUCKET }}/release/latest
+          args: sync -v --no-update-modtime objstore:release/${{ env.VERSION }} objstore:release/latest
+
+      - name: Create GitHub releases and push binaries
+        run: |
+          maybePrerelease=""
+          if [[ $VERSION == *-* ]]; then
+            maybePrerelease="--prerelease"
+          fi
+          export GH_PROMPT_DISABLED=1
+          if ! gh release view --json name "$VERSION" >/dev/null 2>&1 ; then
+            gh release create "$VERSION" \
+              $maybePrerelease \
+              --title "$VERSION" \
+              --notes-from-tag
+          fi
+          gh release upload --clobber "$VERSION" \
+            packages/*.asc packages/*.json \
+            packages/syncthing-*.tar.gz \
+            packages/syncthing-*.zip \
+            packages/syncthing_*.deb
+
+          PKGS=$(pwd)/packages
+          cd /tmp # gh will not release for repo x while inside repo y
+          for repo in relaysrv discosrv ; do
+            export GH_REPO="syncthing/$repo"
+            if ! gh release view --json name "$VERSION" >/dev/null 2>&1 ; then
+              gh release create "$VERSION" \
+                $maybePrerelease \
+                --title "$VERSION" \
+                --notes "https://github.com/syncthing/syncthing/releases/tag/$VERSION"
+            fi
+            gh release upload --clobber "$VERSION" \
+              $PKGS/*.asc \
+              $PKGS/*${repo}*
+          done
+        env:
+          GH_TOKEN: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
 
   #
   # Push Debian/APT archive
@@ -809,7 +829,7 @@ jobs:
 
   publish-apt:
     name: Publish APT
-    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release' || startsWith(github.ref, 'refs/heads/release-') || startsWith(github.ref, 'refs/tags/v'))
+    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/release-nightly' || startsWith(github.ref, 'refs/tags/v'))
     environment: release
     needs:
       - package-debian
@@ -856,7 +876,7 @@ jobs:
           RCLONE_CONFIG_OBJSTORE_REGION: ${{ secrets.S3_REGION }}
           RCLONE_CONFIG_OBJSTORE_ACL: public-read
         with:
-          args: sync objstore:syncthing-apt/dists dists
+          args: sync objstore:apt/dists dists
 
       - name: Update archive
         uses: docker://ghcr.io/kastelo/ezapt:latest
@@ -879,7 +899,7 @@ jobs:
           RCLONE_CONFIG_OBJSTORE_REGION: ${{ secrets.S3_REGION }}
           RCLONE_CONFIG_OBJSTORE_ACL: public-read
         with:
-          args: sync dists -v objstore:syncthing-apt/dists
+          args: sync -v --no-update-modtime dists objstore:apt/dists
 
   #
   # Build and push to Docker Hub
@@ -888,7 +908,7 @@ jobs:
   docker-syncthing:
     name: Build and push Docker images
     runs-on: ubuntu-latest
-    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/release' || github.ref == 'refs/heads/infrastructure' || startsWith(github.ref, 'refs/heads/release-') || startsWith(github.ref, 'refs/tags/v'))
+    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/release-nightly' || github.ref == 'refs/heads/infrastructure' || startsWith(github.ref, 'refs/tags/v'))
     environment: docker
     permissions:
       contents: read

.github/workflows/pr-linters.yaml

@@ -0,0 +1,49 @@
+name: Run PR linters
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pull-requests: read
+
+jobs:
+
+  #
+  # golangci-lint runs a suite of static analysis checks on the code
+  #
+
+  golangci:
+    runs-on: ubuntu-latest
+    name: Golangci-lint
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 'stable'
+
+      - name: ensure asset generation
+        run: go run build.go assets
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v8
+        with:
+          only-new-issues: true
+
+  #
+  # Meta checks for formatting, copyright, etc
+  #
+
+  meta:
+    name: Meta checks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 'stable'
+
+      - run: |
+          go run build.go assets
+          go test -v ./meta

.github/workflows/pr-metadata.yaml

@@ -0,0 +1,27 @@
+name: PR metadata
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - reopened
+      - edited
+      - synchronize
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+
+  #
+  # Set labels on PRs, which are then used to categorise release notes
+  #
+
+  labels:
+    name: Set labels
+    runs-on: ubuntu-latest
+    steps:
+    - uses: srvaroa/labeler@v1
+      env:
+        GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/release-syncthing.yaml

@@ -0,0 +1,60 @@
+name: Release Syncthing
+
+on:
+  push:
+    branches:
+      - release
+      - release-rc*
+
+permissions:
+  contents: write
+
+jobs:
+  create-release-tag:
+    name: Create release tag
+    runs-on: ubuntu-latest
+    environment: release
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{ github.ref }} # https://github.com/actions/checkout/issues/882
+          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: stable
+
+      - name: Determine version to release
+        run: |
+          if [[ "$GITHUB_REF_NAME" == "release" ]] ; then
+            next=$(go run ./script/next-version.go)
+          else
+            next=$(go run ./script/next-version.go --pre)
+          fi
+          echo "NEXT=$next" >> $GITHUB_ENV
+          echo "Next version is $next"
+
+          prev=$(git describe --exclude "*-*" --abbrev=0)
+          echo "PREV=$prev" >> $GITHUB_ENV
+          echo "Previous version is $prev"
+
+      - name: Determine release notes
+        run: |
+          go run ./script/relnotes.go --new-ver "$NEXT" --branch "$GITHUB_REF_NAME" --prev-ver "$PREV" > notes.md
+        env:
+          GITHUB_TOKEN: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
+
+      - name: Create and push tag
+        run: |
+          git config --global user.name 'Syncthing Release Automation'
+          git config --global user.email 'release@syncthing.net'
+          git tag -a -F notes.md --cleanup=whitespace "$NEXT"
+          git push origin "$NEXT"
+
+      - name: Trigger the build
+        uses: benc-uk/workflow-dispatch@v1
+        with:
+          workflow: build-syncthing.yaml
+          ref: refs/tags/${{ env.NEXT }}
+          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}

.golangci.yml

@@ -1,39 +1,67 @@
+version: "2"
 linters:
-  enable-all: true
+  default: all
   disable:
     - cyclop
     - depguard
     - exhaustive
     - exhaustruct
+    - forbidigo
     - funlen
-    - gci
     - gochecknoglobals
     - gochecknoinits
     - gocognit
     - goconst
     - gocyclo
     - godox
-    - gofmt
-    - goimports
     - gomoddirectives
     - inamedparam
     - interfacebloat
     - ireturn
     - lll
     - maintidx
+    - mnd
+    - musttag
     - nestif
+    - nlreturn
     - nonamedreturns
     - paralleltest
+    - prealloc
+    - predeclared
     - protogetter
-    - scopelint
+    - recvcheck
+    - revive
     - tagalign
     - tagliatelle
     - testpackage
+    - usetesting # go 1.24
     - varnamelen
+    - whitespace
+    - wrapcheck
     - wsl
-
-issues:
-  exclude-dirs:
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
       - internal/gen
       - cmd/dev
       - repos
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gofumpt
+  exclusions:
+    generated: lax
+    paths:
+      - internal/gen
+      - cmd/dev
+      - repos
+      - third_party$
+      - builtin$
+      - examples$

AUTHORS

@@ -48,6 +48,7 @@ Arkadiusz Tymiński <gevleeog@gmail.com>
 Aroun <login@b-vo.fr>
 Arthur Axel fREW Schmidt (frioux) <frew@afoolishmanifesto.com> <frioux@gmail.com>
 Artur Zubilewicz <AkaZecik@users.noreply.github.com>
+Ashish Bhate <bhate.ashish@gmail.com>
 Audrius Butkevicius (AudriusButkevicius) <audrius.butkevicius@gmail.com> <github@audrius.rocks>
 Aurélien Rainone <476650+arl@users.noreply.github.com>
 BAHADIR YILMAZ <bahadiryilmaz32@gmail.com>
@@ -113,6 +114,7 @@ diemade <spamkill@posteo.ch>
 digital <didev@dinid.net>
 Dimitri Papadopoulos Orfanos <3234522+DimitriPapadopoulos@users.noreply.github.com>
 Dmitry Saveliev (dsaveliev) <d.e.saveliev@gmail.com>
+domain <32405309+szu17dmy@users.noreply.github.com>
 Domenic Horner <domenic@tgxn.net>
 Dominik Heidler (asdil12) <dominik@heidler.eu>
 Elias Jarlebring (jarlebring) <jarlebring@gmail.com>
@@ -147,6 +149,7 @@ Gusted <postmaster@gusted.xyz> <williamzijl7@hotmail.com>
 Han Boetes <han@boetes.org>
 HansK-p <42314815+HansK-p@users.noreply.github.com>
 Harrison Jones (harrisonhjones) <harrisonhjones@users.noreply.github.com>
+Hazem Krimi <me@hazemkrimi.tech>
 Heiko Zuerker (Smiley73) <heiko@zuerker.org>
 Hireworks <129852174+hireworksltd@users.noreply.github.com>
 Hugo Locurcio <hugo.locurcio@hugo.pro>
@@ -221,9 +224,10 @@ luzpaz <luzpaz@users.noreply.github.com>
 Majed Abdulaziz (majedev) <majed.alhajry@gmail.com>
 Marc Laporte (marclaporte) <marc@marclaporte.com> <marc@laporte.name>
 Marc Pujol (kilburn) <kilburn@la3.org>
+Marcel Meyer <mm.marcelmeyer@gmail.com>
 Marcin Dziadus (marcindziadus) <dziadus.marcin@gmail.com>
 marco-m <marco.molteni@laposte.net>
-Marcus B Spencer <marcus@marcusspencer.xyz>
+Marcus B Spencer <marcus@marcusspencer.xyz> <marcus@marcusspencer.us>
 Marcus Legendre <marcus.legendre@gmail.com>
 Mario Majila <mariustshipichik@gmail.com>
 Mark Pulford (mpx) <mark@kyne.com.au>
@@ -277,6 +281,7 @@ Oyebanji Jacob Mayowa <oyebanji05@gmail.com>
 Pablo <pbaeyens31+github@gmail.com>
 Pascal Jungblut (pascalj) <github@pascalj.com> <mail@pascal-jungblut.com>
 Paul Brit <paulbrit44@gmail.com>
+Paul Donald <newtwen+github@gmail.com>
 Pawel Palenica (qepasa) <pawelpalenica11@gmail.com>
 Paweł Rozlach <vespian@users.noreply.github.com>
 perewa <cavalcante.ten@gmail.com>
@@ -292,6 +297,7 @@ Pier Paolo Ramon <ramonpierre@gmail.com>
 Piotr Bejda (piobpl) <piotrb10@gmail.com>
 polyfloyd <polyfloyd@users.noreply.github.com>
 Pramodh KP (pramodhkp) <pramodh.p@directi.com> <1507241+pramodhkp@users.noreply.github.com>
+pullmerge <166967364+pullmerge@users.noreply.github.com>
 Quentin Hibon <qh.public@yahoo.com>
 Rahmi Pruitt <rjpruitt16@gmail.com>
 red_led <red-led@users.noreply.github.com>
@@ -324,8 +330,10 @@ Suhas Gundimeda (snugghash) <suhas.gundimeda@gmail.com> <snugghash@gmail.com>
 Sven Bachmann <dev@mcbachmann.de>
 Syncthing Automation <automation@syncthing.net>
 Syncthing Release Automation <release@syncthing.net>
+Sébastien WENSKE <sebastien@wenske.fr>
 Taylor Khan (nelsonkhan) <nelsonkhan@gmail.com>
 Terrance <git@terrance.allofti.me>
+TheCreeper <TheCreeper@users.noreply.github.com>
 Thomas <9749173+uhthomas@users.noreply.github.com>
 Thomas Hipp <thomashipp@gmail.com>
 Tim Abell (timabell) <tim@timwise.co.uk>

build.go

@@ -330,7 +330,7 @@ func runCommand(cmd string, target target) {
 		writeCompatJSON()
 
 	case "deb":
-		buildDeb(target)
+		buildDeb(target, tags)
 
 	case "vet":
 		metalintShort()
@@ -609,7 +609,7 @@ func buildZip(target target, tags []string) {
 	fmt.Println(filename)
 }
 
-func buildDeb(target target) {
+func buildDeb(target target, tags []string) {
 	os.RemoveAll("deb")
 
 	// "goarch" here is set to whatever the Debian packages expect. We correct
@@ -623,7 +623,7 @@ func buildDeb(target target) {
 		goarch = "arm"
 	}
 
-	build(target, []string{"noupgrade"})
+	build(target, append(tags, "noupgrade"))
 
 	for i := range target.installationFiles {
 		target.installationFiles[i].src = strings.Replace(target.installationFiles[i].src, "{{binary}}", target.BinaryName(), 1)
@@ -645,6 +645,9 @@ func buildDeb(target target) {
 		// than just 0.14.26. This rectifies that.
 		debver = strings.Replace(debver, "-", "~", -1)
 	}
+	if strings.Contains(debver, "_") {
+		debver = strings.Replace(debver, "_", "~", -1)
+	}
 	args := []string{
 		"-t", "deb",
 		"-s", "dir",

build.sh

@@ -23,6 +23,7 @@ case "${1:-default}" in
 
 	prerelease)
 		script authors
+		script copyrights
 		build weblate
 		pushd man ; ./refresh.sh ; popd
 		git add -A gui man AUTHORS

cmd/infra/stcrashreceiver/diskstore.go

@@ -8,6 +8,7 @@ package main
 
 import (
 	"bytes"
+	"cmp"
 	"compress/gzip"
 	"context"
 	"io"
@@ -15,7 +16,7 @@ import (
 	"math"
 	"os"
 	"path/filepath"
-	"sort"
+	"slices"
 	"time"
 )
 
@@ -177,8 +178,8 @@ func (d *diskStore) inventory() error {
 		})
 		return nil
 	})
-	sort.Slice(d.currentFiles, func(i, j int) bool {
-		return d.currentFiles[i].mtime < d.currentFiles[j].mtime
+	slices.SortFunc(d.currentFiles, func(a, b currentFile) int {
+		return cmp.Compare(a.mtime, b.mtime)
 	})
 	var oldest time.Duration
 	if len(d.currentFiles) > 0 {

cmd/infra/strelaypoolsrv/main.go

@@ -29,6 +29,7 @@ import (
 	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/geoip"
 	"github.com/syncthing/syncthing/lib/protocol"
+	"github.com/syncthing/syncthing/lib/rand"
 	"github.com/syncthing/syncthing/lib/relay/client"
 	"github.com/syncthing/syncthing/lib/sync"
 	"github.com/syncthing/syncthing/lib/tlsutil"
@@ -110,6 +111,7 @@ var (
 	requestProcessors = 8
 	geoipLicenseKey   = os.Getenv("GEOIP_LICENSE_KEY")
 	geoipAccountID, _ = strconv.Atoi(os.Getenv("GEOIP_ACCOUNT_ID"))
+	maxRelaysReturned = 100
 
 	requests chan request
 
@@ -141,6 +143,7 @@ func main() {
 	flag.IntVar(&requestQueueLen, "request-queue", requestQueueLen, "Queue length for incoming test requests")
 	flag.IntVar(&requestProcessors, "request-processors", requestProcessors, "Number of request processor routines")
 	flag.StringVar(&geoipLicenseKey, "geoip-license-key", geoipLicenseKey, "License key for GeoIP database")
+	flag.IntVar(&maxRelaysReturned, "max-relays-returned", maxRelaysReturned, "Maximum number of relays returned for a normal endpoint query")
 
 	flag.Parse()
 
@@ -331,6 +334,10 @@ func handleEndpointShort(rw http.ResponseWriter, r *http.Request) {
 		relays = append(relays, relayShort{URL: slimURL(r.URL)})
 	}
 	mut.RUnlock()
+	if len(relays) > maxRelaysReturned {
+		rand.Shuffle(relays)
+		relays = relays[:maxRelaysReturned]
+	}
 
 	_ = json.NewEncoder(rw).Encode(map[string][]relayShort{
 		"relays": relays,

cmd/infra/stupgrades/main.go

@@ -201,17 +201,21 @@ func (p *proxy) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 // looking for a prerelease at all.
 func filterForLatest(rels []upgrade.Release) []upgrade.Release {
 	var filtered []upgrade.Release
-	var havePre bool
+	havePre := make(map[string]bool)
+	haveStable := make(map[string]bool)
 	for _, rel := range rels {
-		if !rel.Prerelease {
-			// We found a stable version, we're good now.
+		major, _, _ := strings.Cut(rel.Tag, ".")
+		if !rel.Prerelease && !haveStable[major] {
+			// Remember the first non-pre for each major
 			filtered = append(filtered, rel)
-			break
+			haveStable[major] = true
+			continue
 		}
-		if rel.Prerelease && !havePre {
-			// We remember the first prerelease we find.
+		if rel.Prerelease && !havePre[major] && !haveStable[major] {
+			// We remember the first prerelease we find, unless we've
+			// already found a non-pre of the same major.
 			filtered = append(filtered, rel)
-			havePre = true
+			havePre[major] = true
 		}
 	}
 	return filtered
@@ -261,6 +265,7 @@ type cachedReleases struct {
 	url                  string
 	mut                  sync.RWMutex
 	current              []upgrade.Release
+	latestRel, latestPre string
 }
 
 func (c *cachedReleases) Releases() []upgrade.Release {
@@ -274,8 +279,26 @@ func (c *cachedReleases) Update(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
+	latestRel, latestPre := "", ""
+	for _, rel := range rels {
+		if !rel.Prerelease && latestRel == "" {
+			latestRel = rel.Tag
+		}
+		if rel.Prerelease && latestPre == "" {
+			latestPre = rel.Tag
+		}
+		if latestRel != "" && latestPre != "" {
+			break
+		}
+	}
 	c.mut.Lock()
 	c.current = rels
+	if latestRel != c.latestRel || latestPre != c.latestPre {
+		metricLatestReleaseInfo.DeleteLabelValues(c.latestRel, c.latestPre)
+		metricLatestReleaseInfo.WithLabelValues(latestRel, latestPre).Set(1)
+		c.latestRel = latestRel
+		c.latestPre = latestPre
+	}
 	c.mut.Unlock()
 	return nil
 }

cmd/infra/stupgrades/metrics.go

@@ -27,4 +27,10 @@ var (
 		Subsystem: "upgrade",
 		Name:      "http_requests",
 	}, []string{"target", "result"})
+	metricLatestReleaseInfo = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: "syncthing",
+		Subsystem: "upgrade",
+		Name:      "latest_release_info",
+		Help:      "Release information",
+	}, []string{"latest_release", "latest_pre"})
 )

cmd/infra/ursrv/serve/serve.go

@@ -26,9 +26,11 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/puzpuzpuz/xsync/v3"
+	"github.com/syncthing/syncthing/internal/blob"
+	"github.com/syncthing/syncthing/internal/blob/azureblob"
+	"github.com/syncthing/syncthing/internal/blob/s3"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/geoip"
-	"github.com/syncthing/syncthing/lib/s3"
 	"github.com/syncthing/syncthing/lib/ur/contract"
 )
 
@@ -40,11 +42,15 @@ type CLI struct {
 	DumpFile        string        `env:"UR_DUMP_FILE" default:"reports.jsons.gz"`
 	DumpInterval    time.Duration `env:"UR_DUMP_INTERVAL" default:"5m"`
 
-	S3Endpoint    string `name:"s3-endpoint" hidden:"true" env:"UR_S3_ENDPOINT"`
-	S3Region      string `name:"s3-region" hidden:"true" env:"UR_S3_REGION"`
-	S3Bucket      string `name:"s3-bucket" hidden:"true" env:"UR_S3_BUCKET"`
-	S3AccessKeyID string `name:"s3-access-key-id" hidden:"true" env:"UR_S3_ACCESS_KEY_ID"`
-	S3SecretKey   string `name:"s3-secret-key" hidden:"true" env:"UR_S3_SECRET_KEY"`
+	S3Endpoint    string `name:"s3-endpoint" env:"UR_S3_ENDPOINT"`
+	S3Region      string `name:"s3-region" env:"UR_S3_REGION"`
+	S3Bucket      string `name:"s3-bucket" env:"UR_S3_BUCKET"`
+	S3AccessKeyID string `name:"s3-access-key-id" env:"UR_S3_ACCESS_KEY_ID"`
+	S3SecretKey   string `name:"s3-secret-key" env:"UR_S3_SECRET_KEY"`
+
+	AzureBlobAccount   string `name:"azure-blob-account" env:"UR_AZUREBLOB_ACCOUNT"`
+	AzureBlobKey       string `name:"azure-blob-key" env:"UR_AZUREBLOB_KEY"`
+	AzureBlobContainer string `name:"azure-blob-container" env:"UR_AZUREBLOB_CONTAINER"`
 }
 
 var (
@@ -77,6 +83,7 @@ var (
 		{regexp.MustCompile(`\ssyncthing@archlinux`), "Arch (3rd party)"},
 		{regexp.MustCompile(`@debian`), "Debian (3rd party)"},
 		{regexp.MustCompile(`@fedora`), "Fedora (3rd party)"},
+		{regexp.MustCompile(`@openSUSE`), "openSUSE (3rd party)"},
 		{regexp.MustCompile(`\sbrew@`), "Homebrew (3rd party)"},
 		{regexp.MustCompile(`\sroot@buildkitsandbox`), "LinuxServer.io (3rd party)"},
 		{regexp.MustCompile(`\sports@freebsd`), "FreeBSD (3rd party)"},
@@ -119,19 +126,25 @@ func (cli *CLI) Run() error {
 		go geo.Serve(context.TODO())
 	}
 
-	// s3
+	// Blob storage
 
-	var s3sess *s3.Session
+	var blobs blob.Store
 	if cli.S3Endpoint != "" {
-		s3sess, err = s3.NewSession(cli.S3Endpoint, cli.S3Region, cli.S3Bucket, cli.S3AccessKeyID, cli.S3SecretKey)
+		blobs, err = s3.NewSession(cli.S3Endpoint, cli.S3Region, cli.S3Bucket, cli.S3AccessKeyID, cli.S3SecretKey)
 		if err != nil {
 			slog.Error("Failed to create S3 session", "error", err)
 			return err
 		}
+	} else if cli.AzureBlobAccount != "" {
+		blobs, err = azureblob.NewBlobStore(cli.AzureBlobAccount, cli.AzureBlobKey, cli.AzureBlobContainer)
+		if err != nil {
+			slog.Error("Failed to create Azure blob store", "error", err)
+			return err
+		}
 	}
 
-	if _, err := os.Stat(cli.DumpFile); err != nil && s3sess != nil {
-		if err := cli.downloadDumpFile(s3sess); err != nil {
+	if _, err := os.Stat(cli.DumpFile); err != nil && blobs != nil {
+		if err := cli.downloadDumpFile(blobs); err != nil {
 			slog.Error("Failed to download dump file", "error", err)
 		}
 	}
@@ -153,7 +166,7 @@ func (cli *CLI) Run() error {
 
 	go func() {
 		for range time.Tick(cli.DumpInterval) {
-			if err := cli.saveDumpFile(srv, s3sess); err != nil {
+			if err := cli.saveDumpFile(srv, blobs); err != nil {
 				slog.Error("Failed to write dump file", "error", err)
 			}
 		}
@@ -192,8 +205,8 @@ func (cli *CLI) Run() error {
 	return metricsSrv.Serve(urListener)
 }
 
-func (cli *CLI) downloadDumpFile(s3sess *s3.Session) error {
-	latestKey, err := s3sess.LatestKey()
+func (cli *CLI) downloadDumpFile(blobs blob.Store) error {
+	latestKey, err := blobs.LatestKey(context.Background())
 	if err != nil {
 		return fmt.Errorf("list latest S3 key: %w", err)
 	}
@@ -201,7 +214,7 @@ func (cli *CLI) downloadDumpFile(s3sess *s3.Session) error {
 	if err != nil {
 		return fmt.Errorf("create dump file: %w", err)
 	}
-	if err := s3sess.Download(fd, latestKey); err != nil {
+	if err := blobs.Download(context.Background(), latestKey, fd); err != nil {
 		_ = fd.Close()
 		return fmt.Errorf("download dump file: %w", err)
 	}
@@ -212,7 +225,7 @@ func (cli *CLI) downloadDumpFile(s3sess *s3.Session) error {
 	return nil
 }
 
-func (cli *CLI) saveDumpFile(srv *server, s3sess *s3.Session) error {
+func (cli *CLI) saveDumpFile(srv *server, blobs blob.Store) error {
 	fd, err := os.Create(cli.DumpFile + ".tmp")
 	if err != nil {
 		return fmt.Errorf("creating dump file: %w", err)
@@ -233,13 +246,13 @@ func (cli *CLI) saveDumpFile(srv *server, s3sess *s3.Session) error {
 	}
 	slog.Info("Dump file saved")
 
-	if s3sess != nil {
+	if blobs != nil {
 		key := fmt.Sprintf("reports-%s.jsons.gz", time.Now().UTC().Format("2006-01-02"))
 		fd, err := os.Open(cli.DumpFile)
 		if err != nil {
 			return fmt.Errorf("opening dump file: %w", err)
 		}
-		if err := s3sess.Upload(fd, key); err != nil {
+		if err := blobs.Upload(context.Background(), key, fd); err != nil {
 			return fmt.Errorf("uploading dump file: %w", err)
 		}
 		_ = fd.Close()
@@ -351,6 +364,9 @@ func (s *server) addReport(rep *contract.Report) bool {
 			break
 		}
 	}
+	rep.DistDist = rep.Distribution
+	rep.DistOS = rep.OS
+	rep.DistArch = rep.Arch
 
 	_, loaded := s.reports.LoadAndStore(rep.UniqueID, rep)
 	return loaded

cmd/stdiscosrv/apisrv.go

@@ -66,7 +66,7 @@ type contextKey int
 
 const idKey contextKey = iota
 
-func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator, useHTTP, compression bool) *apiSrv {
+func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator, useHTTP, compression bool, desiredNotFoundRate float64) *apiSrv {
 	return &apiSrv{
 		addr:        addr,
 		cert:        cert,
@@ -77,13 +77,13 @@ func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator,
 		seenTracker: &retryAfterTracker{
 			name:         "seenTracker",
 			bucketStarts: time.Now(),
-			desiredRate:  250,
+			desiredRate:  desiredNotFoundRate / 2,
 			currentDelay: notFoundRetryUnknownMinSeconds,
 		},
 		notSeenTracker: &retryAfterTracker{
 			name:         "notSeenTracker",
 			bucketStarts: time.Now(),
-			desiredRate:  250,
+			desiredRate:  desiredNotFoundRate / 2,
 			currentDelay: notFoundRetryUnknownMaxSeconds / 2,
 		},
 	}

cmd/stdiscosrv/apisrv_test.go

@@ -111,7 +111,7 @@ func BenchmarkAPIRequests(b *testing.B) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	go db.Serve(ctx)
-	api := newAPISrv("127.0.0.1:0", tls.Certificate{}, db, nil, true, true)
+	api := newAPISrv("127.0.0.1:0", tls.Certificate{}, db, nil, true, true, 1000)
 	srv := httptest.NewServer(http.HandlerFunc(api.handler))
 
 	kf := b.TempDir() + "/cert"

cmd/stdiscosrv/database.go

@@ -24,11 +24,11 @@ import (
 	"github.com/puzpuzpuz/xsync/v3"
 	"google.golang.org/protobuf/proto"
 
+	"github.com/syncthing/syncthing/internal/blob"
 	"github.com/syncthing/syncthing/internal/gen/discosrv"
 	"github.com/syncthing/syncthing/internal/protoutil"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"
-	"github.com/syncthing/syncthing/lib/s3"
 )
 
 type clock interface {
@@ -51,12 +51,12 @@ type inMemoryStore struct {
 	m             *xsync.MapOf[protocol.DeviceID, *discosrv.DatabaseRecord]
 	dir           string
 	flushInterval time.Duration
-	s3            *s3.Session
+	blobs         blob.Store
 	objKey        string
 	clock         clock
 }
 
-func newInMemoryStore(dir string, flushInterval time.Duration, s3sess *s3.Session) *inMemoryStore {
+func newInMemoryStore(dir string, flushInterval time.Duration, blobs blob.Store) *inMemoryStore {
 	hn, err := os.Hostname()
 	if err != nil {
 		hn = rand.String(8)
@@ -65,25 +65,25 @@ func newInMemoryStore(dir string, flushInterval time.Duration, s3sess *s3.Sessio
 		m:             xsync.NewMapOf[protocol.DeviceID, *discosrv.DatabaseRecord](),
 		dir:           dir,
 		flushInterval: flushInterval,
-		s3:            s3sess,
+		blobs:         blobs,
 		objKey:        hn + ".db",
 		clock:         defaultClock{},
 	}
 	nr, err := s.read()
-	if os.IsNotExist(err) && s3sess != nil {
-		// Try to read from AWS
-		latestKey, cerr := s3sess.LatestKey()
+	if os.IsNotExist(err) && blobs != nil {
+		// Try to read from blob storage
+		latestKey, cerr := blobs.LatestKey(context.Background())
 		if cerr != nil {
-			log.Println("Error reading database from S3:", err)
+			log.Println("Error finding database from blob storage:", cerr)
 			return s
 		}
 		fd, cerr := os.Create(path.Join(s.dir, "records.db"))
 		if cerr != nil {
-			log.Println("Error creating database file:", err)
+			log.Println("Error creating database file:", cerr)
 			return s
 		}
-		if cerr := s3sess.Download(fd, latestKey); cerr != nil {
-			log.Printf("Error reading database from S3: %v", err)
+		if cerr := blobs.Download(context.Background(), latestKey, fd); cerr != nil {
+			log.Printf("Error downloading database from blob storage: %v", cerr)
 		}
 		_ = fd.Close()
 		nr, err = s.read()
@@ -310,16 +310,16 @@ func (s *inMemoryStore) write() (err error) {
 		return err
 	}
 
-	// Upload to S3
-	if s.s3 != nil {
+	// Upload to blob storage
+	if s.blobs != nil {
 		fd, err = os.Open(dbf)
 		if err != nil {
-			log.Printf("Error uploading database to S3: %v", err)
+			log.Printf("Error uploading database to blob storage: %v", err)
 			return nil
 		}
 		defer fd.Close()
-		if err := s.s3.Upload(fd, s.objKey); err != nil {
-			log.Printf("Error uploading database to S3: %v", err)
+		if err := s.blobs.Upload(context.Background(), s.objKey, fd); err != nil {
+			log.Printf("Error uploading database to blob storage: %v", err)
 		}
 		log.Println("Finished uploading database")
 	}

cmd/stdiscosrv/main.go

@@ -21,11 +21,13 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/thejerf/suture/v4"
 
+	"github.com/syncthing/syncthing/internal/blob"
+	"github.com/syncthing/syncthing/internal/blob/azureblob"
+	"github.com/syncthing/syncthing/internal/blob/s3"
 	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"
-	"github.com/syncthing/syncthing/lib/s3"
 	"github.com/syncthing/syncthing/lib/tlsutil"
 )
 
@@ -64,6 +66,7 @@ type CLI struct {
 	Compression         bool    `group:"Listen" help:"Enable GZIP compression of responses" env:"DISCOVERY_COMPRESSION"`
 	Listen              string  `group:"Listen" help:"Listen address" default:":8443" env:"DISCOVERY_LISTEN"`
 	MetricsListen       string  `group:"Listen" help:"Metrics listen address" env:"DISCOVERY_METRICS_LISTEN"`
+	DesiredNotFoundRate float64 `group:"Listen" help:"Desired maximum rate of not-found replies (/s)" default:"1000"`
 
 	DBDir           string        `group:"Database" help:"Database directory" default:"." env:"DISCOVERY_DB_DIR"`
 	DBFlushInterval time.Duration `group:"Database" help:"Interval between database flushes" default:"5m" env:"DISCOVERY_DB_FLUSH_INTERVAL"`
@@ -74,6 +77,10 @@ type CLI struct {
 	DBS3AccessKeyID string `name:"db-s3-access-key-id" group:"Database (S3 backup)" hidden:"true" help:"S3 access key ID for database" env:"DISCOVERY_DB_S3_ACCESS_KEY_ID"`
 	DBS3SecretKey   string `name:"db-s3-secret-key" group:"Database (S3 backup)" hidden:"true" help:"S3 secret key for database" env:"DISCOVERY_DB_S3_SECRET_KEY"`
 
+	DBAzureBlobAccount   string `name:"db-azure-blob-account" env:"DISCOVERY_DB_AZUREBLOB_ACCOUNT"`
+	DBAzureBlobKey       string `name:"db-azure-blob-key" env:"DISCOVERY_DB_AZUREBLOB_KEY"`
+	DBAzureBlobContainer string `name:"db-azure-blob-container" env:"DISCOVERY_DB_AZUREBLOB_CONTAINER"`
+
 	AMQPAddress string `group:"AMQP replication" hidden:"true" help:"Address to AMQP broker" env:"DISCOVERY_AMQP_ADDRESS"`
 
 	Debug   bool `short:"d" help:"Print debug output" env:"DISCOVERY_DEBUG"`
@@ -117,18 +124,20 @@ func main() {
 		Timeout:           2 * time.Minute,
 	})
 
-	// If configured, use S3 for database backups.
-	var s3c *s3.Session
-	if cli.DBS3Endpoint != "" {
+	// If configured, use blob storage for database backups.
+	var blobs blob.Store
 	var err error
-		s3c, err = s3.NewSession(cli.DBS3Endpoint, cli.DBS3Region, cli.DBS3Bucket, cli.DBS3AccessKeyID, cli.DBS3SecretKey)
-		if err != nil {
-			log.Fatalf("Failed to create S3 session: %v", err)
+	if cli.DBS3Endpoint != "" {
+		blobs, err = s3.NewSession(cli.DBS3Endpoint, cli.DBS3Region, cli.DBS3Bucket, cli.DBS3AccessKeyID, cli.DBS3SecretKey)
+	} else if cli.DBAzureBlobAccount != "" {
+		blobs, err = azureblob.NewBlobStore(cli.DBAzureBlobAccount, cli.DBAzureBlobKey, cli.DBAzureBlobContainer)
 	}
+	if err != nil {
+		log.Fatalf("Failed to create blob store: %v", err)
 	}
 
 	// Start the database.
-	db := newInMemoryStore(cli.DBDir, cli.DBFlushInterval, s3c)
+	db := newInMemoryStore(cli.DBDir, cli.DBFlushInterval, blobs)
 	main.Add(db)
 
 	// If we have an AMQP broker for replication, start that
@@ -141,7 +150,7 @@ func main() {
 	}
 
 	// Start the main API server.
-	qs := newAPISrv(cli.Listen, cert, db, repl, cli.HTTP, cli.Compression)
+	qs := newAPISrv(cli.Listen, cert, db, repl, cli.HTTP, cli.Compression, cli.DesiredNotFoundRate)
 	main.Add(qs)
 
 	// If we have a metrics port configured, start a metrics handler.

cmd/strelaysrv/listener.go

@@ -184,7 +184,7 @@ func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config, token strin
 					continue
 				}
 				// requestedPeer is the server, id is the client
-				ses := newSession(requestedPeer, id, sessionLimiter, globalLimiter)
+				ses := newSession(requestedPeer, id, sessionLimitBps, globalLimiter)
 
 				go ses.Serve()
 

cmd/strelaysrv/main.go

@@ -51,7 +51,6 @@ var (
 	globalLimitBps    int
 	overLimit         atomic.Bool
 	descriptorLimit   int64
-	sessionLimiter    *rate.Limiter
 	globalLimiter     *rate.Limiter
 	networkBufferSize int
 
@@ -228,9 +227,6 @@ func main() {
 		}
 	}
 
-	if sessionLimitBps > 0 {
-		sessionLimiter = rate.NewLimiter(rate.Limit(sessionLimitBps), 2*sessionLimitBps)
-	}
 	if globalLimitBps > 0 {
 		globalLimiter = rate.NewLimiter(rate.Limit(globalLimitBps), 2*globalLimitBps)
 	}

cmd/strelaysrv/session.go

@@ -27,7 +27,7 @@ var (
 	bytesProxied    atomic.Int64
 )
 
-func newSession(serverid, clientid syncthingprotocol.DeviceID, sessionRateLimit, globalRateLimit *rate.Limiter) *session {
+func newSession(serverid, clientid syncthingprotocol.DeviceID, sessionLimitBps int, globalRateLimit *rate.Limiter) *session {
 	serverkey := make([]byte, 32)
 	_, err := rand.Read(serverkey)
 	if err != nil {
@@ -40,12 +40,17 @@ func newSession(serverid, clientid syncthingprotocol.DeviceID, sessionRateLimit,
 		return nil
 	}
 
+	var sessionRateLimit *rate.Limiter
+	if sessionLimitBps > 0 {
+		sessionRateLimit = rate.NewLimiter(rate.Limit(sessionLimitBps), 2*sessionLimitBps)
+	}
 	ses := &session{
 		serverkey: serverkey,
 		serverid:  serverid,
 		clientkey: clientkey,
 		clientid:  clientid,
 		rateLimit: makeRateLimitFunc(sessionRateLimit, globalRateLimit),
+		limiter:   sessionRateLimit,
 		connsChan: make(chan net.Conn),
 		conns:     make([]net.Conn, 0, 2),
 	}
@@ -109,6 +114,7 @@ type session struct {
 	clientid  syncthingprotocol.DeviceID
 
 	rateLimit func(bytes int)
+	limiter   *rate.Limiter
 
 	connsChan chan net.Conn
 	conns     []net.Conn

cmd/syncthing/cli/index_dumpsize.go

@@ -7,9 +7,10 @@
 package cli
 
 import (
+	"cmp"
 	"encoding/binary"
 	"fmt"
-	"sort"
+	"slices"
 
 	"github.com/syncthing/syncthing/lib/db"
 )
@@ -77,8 +78,8 @@ func indexDumpSize() error {
 		elems = append(elems, ele)
 	}
 
-	sort.Slice(elems, func(i, j int) bool {
-		return elems[i].size > elems[j].size
+	slices.SortFunc(elems, func(a, b sizedElement) int {
+		return cmp.Compare(b.size, a.size)
 	})
 	for _, ele := range elems {
 		fmt.Println(ele.key, ele.size)

cmd/syncthing/cli/index_idxck.go

@@ -8,10 +8,11 @@ package cli
 
 import (
 	"bytes"
+	"cmp"
 	"encoding/binary"
 	"errors"
 	"fmt"
-	"sort"
+	"slices"
 
 	"google.golang.org/protobuf/proto"
 
@@ -207,11 +208,11 @@ func indexCheck() (err error) {
 
 	// Aggregate the ranges of missing sequence entries, print them
 
-	sort.Slice(missingSeq, func(a, b int) bool {
-		if missingSeq[a].folder != missingSeq[b].folder {
-			return missingSeq[a].folder < missingSeq[b].folder
+	slices.SortFunc(missingSeq, func(a, b sequenceKey) int {
+		if a.folder != b.folder {
+			return cmp.Compare(a.folder, b.folder)
 		}
-		return missingSeq[a].sequence < missingSeq[b].sequence
+		return cmp.Compare(a.sequence, b.sequence)
 	})
 
 	var folder uint32

cmd/syncthing/crash_reporting.go

@@ -14,7 +14,7 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
-	"sort"
+	"slices"
 	"strings"
 	"time"
 )
@@ -37,7 +37,9 @@ func uploadPanicLogs(ctx context.Context, urlBase, dir string) {
 		return
 	}
 
-	sort.Sort(sort.Reverse(sort.StringSlice(files)))
+	slices.SortFunc(files, func(a, b string) int {
+		return strings.Compare(b, a)
+	})
 	for _, file := range files {
 		if strings.Contains(file, ".reported.") {
 			// We've already sent this file. It'll be cleaned out at some

cmd/syncthing/main.go

@@ -23,7 +23,7 @@ import (
 	"path/filepath"
 	"regexp"
 	"runtime/pprof"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"syscall"
@@ -349,11 +349,13 @@ func (options serveOptions) Run() error {
 		return nil
 	}
 
-	// Ensure that our home directory exists.
-	if err := syncthing.EnsureDir(locations.GetBaseDir(locations.ConfigBaseDir), 0o700); err != nil {
-		l.Warnln("Failure on home directory:", err)
+	// Ensure that our config and data directories exist.
+	for _, loc := range []locations.BaseDirEnum{locations.ConfigBaseDir, locations.DataBaseDir} {
+		if err := syncthing.EnsureDir(locations.GetBaseDir(loc), 0o700); err != nil {
+			l.Warnln("Failed to ensure directory exists:", err)
 			os.Exit(svcutil.ExitError.AsInt())
 		}
+	}
 
 	if options.UpgradeTo != "" {
 		err := upgrade.ToURL(options.UpgradeTo)
@@ -376,7 +378,7 @@ func (options serveOptions) Run() error {
 	if options.Upgrade {
 		release, err := checkUpgrade()
 		if err == nil {
-			lf := flock.New(locations.Get(locations.CertFile))
+			lf := flock.New(locations.Get(locations.LockFile))
 			locked, err := lf.TryLock()
 			if err != nil {
 				l.Warnln("Upgrade:", err)
@@ -386,6 +388,8 @@ func (options serveOptions) Run() error {
 			} else {
 				err = upgrade.To(release)
 			}
+			_ = lf.Unlock()
+			_ = os.Remove(locations.Get(locations.LockFile))
 		}
 		if err != nil {
 			l.Warnln("Upgrade:", err)
@@ -439,7 +443,7 @@ func debugFacilities() string {
 			maxLen = len(name)
 		}
 	}
-	sort.Strings(names)
+	slices.Sort(names)
 
 	// Format the choices
 	b := new(bytes.Buffer)
@@ -546,7 +550,7 @@ func syncthingMain(options serveOptions) {
 	}
 
 	// Ensure we are the only running instance
-	lf := flock.New(locations.Get(locations.CertFile))
+	lf := flock.New(locations.Get(locations.LockFile))
 	locked, err := lf.TryLock()
 	if err != nil {
 		l.Warnln("Failed to acquire lock:", err)
@@ -574,6 +578,7 @@ func syncthingMain(options serveOptions) {
 		os.Exit(svcutil.ExitError.AsInt())
 	}
 	earlyService.Add(cfgWrapper)
+	config.RegisterInfoMetrics(cfgWrapper)
 
 	// Candidate builds should auto upgrade. Make sure the option is set,
 	// unless we are in a build where it's disabled or the STNOUPGRADE
@@ -636,9 +641,21 @@ func syncthingMain(options serveOptions) {
 		DBRecheckInterval:    options.DebugDBRecheckInterval,
 		DBIndirectGCInterval: options.DebugDBIndirectGCInterval,
 	}
-	if options.Audit {
-		appOpts.AuditWriter = auditWriter(options.AuditFile)
+
+	if options.Audit || cfgWrapper.Options().AuditEnabled {
+		l.Infoln("Auditing is enabled.")
+
+		auditFile := cfgWrapper.Options().AuditFile
+
+		// Ignore config option if command-line option is set
+		if options.AuditFile != "" {
+			l.Debugln("Using the audit file from the command-line parameter.")
+			auditFile = options.AuditFile
 		}
+
+		appOpts.AuditWriter = auditWriter(auditFile)
+	}
+
 	if dur, err := time.ParseDuration(os.Getenv("STRECHECKDBEVERY")); err == nil {
 		appOpts.DBRecheckInterval = dur
 	}
@@ -692,6 +709,10 @@ func syncthingMain(options serveOptions) {
 		pprof.StopCPUProfile()
 	}
 
+	// Best effort remove lockfile, doesn't matter if it succeeds
+	_ = lf.Unlock()
+	_ = os.Remove(locations.Get(locations.LockFile))
+
 	os.Exit(int(status))
 }
 

cmd/syncthing/monitor.go

@@ -238,10 +238,9 @@ func copyStderr(stderr io.Reader, dst io.Writer) {
 			return
 		}
 
-		if panicFd == nil {
 		dst.Write([]byte(line))
 
-			if strings.HasPrefix(line, "panic:") || strings.HasPrefix(line, "fatal error:") {
+		if panicFd == nil && (strings.HasPrefix(line, "panic:") || strings.HasPrefix(line, "fatal error:")) {
 			panicFd, err = os.Create(locations.GetTimestamped(locations.PanicLog))
 			if err != nil {
 				l.Warnln("Create panic log:", err)
@@ -277,7 +276,6 @@ func copyStderr(stderr io.Reader, dst io.Writer) {
 				panicFd.WriteString(line)
 			}
 			stdoutMut.Unlock()
-			}
 
 			panicFd.WriteString("Panic at " + time.Now().Format(time.RFC3339) + "\n")
 		}

go.mod

@@ -4,15 +4,16 @@ go 1.23.0
 
 require (
 	github.com/AudriusButkevicius/recli v0.0.7-0.20220911121932-d000ce8fbf0f
-	github.com/alecthomas/kong v1.9.0
-	github.com/aws/aws-sdk-go v1.55.6
+	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.1
+	github.com/alecthomas/kong v1.11.0
+	github.com/aws/aws-sdk-go v1.55.7
 	github.com/calmh/incontainer v1.0.0
 	github.com/calmh/xdr v1.2.0
 	github.com/ccding/go-stun v0.1.5
 	github.com/chmduquesne/rollinghash v4.0.0+incompatible
 	github.com/d4l3k/messagediff v1.2.1
 	github.com/getsentry/raven-go v0.2.0
-	github.com/go-ldap/ldap/v3 v3.4.10
+	github.com/go-ldap/ldap/v3 v3.4.11
 	github.com/gobwas/glob v0.2.3
 	github.com/gofrs/flock v0.12.1
 	github.com/greatroar/blobloom v0.8.0
@@ -21,59 +22,61 @@ require (
 	github.com/jackpal/go-nat-pmp v1.0.2
 	github.com/julienschmidt/httprouter v1.3.0
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
-	github.com/maruel/panicparse/v2 v2.4.0
+	github.com/maruel/panicparse/v2 v2.5.0
 	github.com/maxbrunsfeld/counterfeiter/v6 v6.11.2
 	github.com/maxmind/geoipupdate/v6 v6.1.0
 	github.com/miscreant/miscreant.go v0.0.0-20200214223636-26d376326b75
 	github.com/oschwald/geoip2-golang v1.11.0
 	github.com/pierrec/lz4/v4 v4.1.22
-	github.com/prometheus/client_golang v1.21.1
+	github.com/prometheus/client_golang v1.22.0
 	github.com/puzpuzpuz/xsync/v3 v3.5.1
-	github.com/quic-go/quic-go v0.50.0
+	github.com/quic-go/quic-go v0.52.0
 	github.com/rabbitmq/amqp091-go v1.10.0
-	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475
-	github.com/shirou/gopsutil/v4 v4.25.2
-	github.com/syncthing/notify v0.0.0-20250207082249-f0fa8f99c2bc
+	github.com/rcrowley/go-metrics v0.0.0-20250401214520-65e299d6c5c9
+	github.com/shirou/gopsutil/v4 v4.25.4
+	github.com/syncthing/notify v0.0.0-20250528144937-c7027d4f7465
 	github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d
 	github.com/thejerf/suture/v4 v4.0.6
 	github.com/urfave/cli v1.22.16
 	github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0
 	github.com/willabides/kongplete v0.4.0
 	go.uber.org/automaxprocs v1.6.0
-	golang.org/x/crypto v0.36.0
-	golang.org/x/net v0.37.0
-	golang.org/x/sys v0.31.0
-	golang.org/x/text v0.23.0
+	golang.org/x/crypto v0.38.0
+	golang.org/x/net v0.40.0
+	golang.org/x/sys v0.33.0
+	golang.org/x/text v0.25.0
 	golang.org/x/time v0.11.0
-	golang.org/x/tools v0.31.0
-	google.golang.org/protobuf v1.36.5
+	golang.org/x/tools v0.33.0
+	google.golang.org/protobuf v1.36.6
 	sigs.k8s.io/yaml v1.4.0
 )
 
 require (
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1 // indirect
 	github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/certifi/gocertifi v0.0.0-20210507211836-431795d63e8d // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/coreos/go-semver v0.3.1 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/ebitengine/purego v0.8.2 // indirect
+	github.com/ebitengine/purego v0.8.3 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
-	github.com/go-asn1-ber/asn1-ber v1.5.7 // indirect
+	github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
-	github.com/google/pprof v0.0.0-20241009165004-a3522334989c // indirect
+	github.com/google/pprof v0.0.0-20250423184734-337e5dd93bb4 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/lufia/plan9stats v0.0.0-20240909124753-873cd0166683 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/nxadm/tail v1.4.11 // indirect
-	github.com/onsi/ginkgo/v2 v2.20.2 // indirect
+	github.com/onsi/ginkgo/v2 v2.23.4 // indirect
 	github.com/oschwald/maxminddb-golang v1.13.1 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
@@ -89,10 +92,9 @@ require (
 	github.com/tklauser/go-sysconf v0.3.14 // indirect
 	github.com/tklauser/numcpus v0.9.0 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
-	go.uber.org/mock v0.5.0 // indirect
-	golang.org/x/exp v0.0.0-20241009180824-f66d83c29e7c // indirect
+	go.uber.org/mock v0.5.2 // indirect
 	golang.org/x/mod v0.24.0 // indirect
-	golang.org/x/sync v0.12.0 // indirect
+	golang.org/x/sync v0.14.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 

go.sum

@@ -1,18 +1,30 @@
 github.com/AudriusButkevicius/recli v0.0.7-0.20220911121932-d000ce8fbf0f h1:GmH5lT+moM7PbAJFBq57nH9WJ+wRnBXr/tyaYWbSAx8=
 github.com/AudriusButkevicius/recli v0.0.7-0.20220911121932-d000ce8fbf0f/go.mod h1:Nhfib1j/VFnLrXL9cHgA+/n2O6P5THuWelOnbfPNd78=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0 h1:Gt0j3wceWMwPmiazCa8MzMA0MfhmPIz0Qp0FJ6qcM0U=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0/go.mod h1:Ot/6aikWnKWi4l9QB7qVSwa8iMphQNqkWALMoNT3rzM=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.9.0 h1:OVoM452qUFBrX+URdH3VpR299ma4kfom0yB0URYky9g=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.9.0/go.mod h1:kUjrAo8bgEwLeZ/CmHqNl3Z/kPm7y6FKfxxK0izYUg4=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1 h1:FPKJS1T+clwv+OLGt13a8UjqeRuh0O4SJ3lUriThc+4=
+github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1/go.mod h1:j2chePtV91HrC22tGoRX3sGY42uF13WzmmV80/OdVAA=
+github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/storage/armstorage v1.8.0 h1:LR0kAX9ykz8G4YgLCaRDVJ3+n43R8MneB5dTy2konZo=
+github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/storage/armstorage v1.8.0/go.mod h1:DWAciXemNf++PQJLeXUB4HHH5OpsAh12HZnu2wXE1jA=
+github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.1 h1:lhZdRq7TIx0GJQvSyX2Si406vrYsov2FXGp/RnSEtcs=
+github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.1/go.mod h1:8cl44BDmi+effbARHMQjgOKA2AYvcohNm7KEt42mSV8=
 github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 h1:mFRzDkZVAjdal+s7s0MwaRv9igoPqLRdzOLzw/8Xvq8=
 github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
+github.com/AzureAD/microsoft-authentication-library-for-go v1.4.2 h1:oygO0locgZJe7PpYPXT5A29ZkwJaPqcva7BVeemZOZs=
+github.com/AzureAD/microsoft-authentication-library-for-go v1.4.2/go.mod h1:wP83P5OoQ5p6ip3ScPr0BAq0BvuPAvacpEuSzyouqAI=
 github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/alecthomas/assert/v2 v2.11.0 h1:2Q9r3ki8+JYXvGsDyBXwH3LcJ+WK5D0gc5E8vS6K3D0=
 github.com/alecthomas/assert/v2 v2.11.0/go.mod h1:Bze95FyfUr7x34QZrjL+XP+0qgp/zg8yS+TtBj1WA3k=
-github.com/alecthomas/kong v1.9.0 h1:Wgg0ll5Ys7xDnpgYBuBn/wPeLGAuK0NvYmEcisJgrIs=
-github.com/alecthomas/kong v1.9.0/go.mod h1:p2vqieVMeTAnaC83txKtXe8FLke2X07aruPWXyMPQrU=
+github.com/alecthomas/kong v1.11.0 h1:y++1gI7jf8O7G7l4LZo5ASFhrhJvzc+WgF/arranEmM=
+github.com/alecthomas/kong v1.11.0/go.mod h1:p2vqieVMeTAnaC83txKtXe8FLke2X07aruPWXyMPQrU=
 github.com/alecthomas/repr v0.4.0 h1:GhI2A8MACjfegCPVq9f1FLvIBS+DrQ2KQBFZP1iFzXc=
 github.com/alecthomas/repr v0.4.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
 github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa h1:LHTHcTQiSGT7VVbI0o4wBRNQIgn917usHWOd6VAffYI=
 github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
-github.com/aws/aws-sdk-go v1.55.6 h1:cSg4pvZ3m8dgYcgqB97MrcdjUmZ1BeMYKUxMMB89IPk=
-github.com/aws/aws-sdk-go v1.55.6/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
+github.com/aws/aws-sdk-go v1.55.7 h1:UJrkFq7es5CShfBwlWAC8DA077vp8PyVbQd3lqLiztE=
+github.com/aws/aws-sdk-go v1.55.7/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/calmh/glob v0.0.0-20220615080505-1d823af5017b h1:Fjm4GuJ+TGMgqfGHN42IQArJb77CfD/mAwLbDUoJe6g=
@@ -34,6 +46,8 @@ github.com/chmduquesne/rollinghash v4.0.0+incompatible/go.mod h1:Uc2I36RRfTAf7Dg
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
+github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
 github.com/cpuguy83/go-md2man/v2 v2.0.5 h1:ZtcqGrnekaHpVLArFSe4HK5DoKx1T0rq2DwVB0alcyc=
 github.com/cpuguy83/go-md2man/v2 v2.0.5/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/d4l3k/messagediff v1.2.1 h1:ZcAIMYsUg0EAp9X+tt8/enBE/Q8Yd5kzPynLyKptt9U=
@@ -41,8 +55,8 @@ github.com/d4l3k/messagediff v1.2.1/go.mod h1:Oozbb1TVXFac9FtSIxHBMnBCq2qeH/2KkE
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/ebitengine/purego v0.8.2 h1:jPPGWs2sZ1UgOSgD2bClL0MJIqu58nOmIcBuXr62z1I=
-github.com/ebitengine/purego v0.8.2/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/ebitengine/purego v0.8.3 h1:K+0AjQp63JEZTEMZiwsI9g0+hAMNohwUOtY0RPGexmc=
+github.com/ebitengine/purego v0.8.3/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/fsnotify/fsnotify v1.5.4/go.mod h1:OVB6XrOHzAwXMpEM7uPOzcehqUV2UqJxmVXmkdnm1bU=
@@ -51,10 +65,10 @@ github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nos
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
 github.com/getsentry/raven-go v0.2.0 h1:no+xWJRb5ZI7eE8TWgIq1jLulQiIoLG0IfYxv5JYMGs=
 github.com/getsentry/raven-go v0.2.0/go.mod h1:KungGk8q33+aIAZUIVWZDr2OfAEBsO49PX4NzFV5kcQ=
-github.com/go-asn1-ber/asn1-ber v1.5.7 h1:DTX+lbVTWaTw1hQ+PbZPlnDZPEIs0SS/GCZAl535dDk=
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@@ -65,6 +79,8 @@ github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1v
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@@ -85,12 +101,10 @@ github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
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@@ -99,7 +113,6 @@ github.com/hashicorp/errwrap v1.1.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brv
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@@ -132,8 +145,8 @@ github.com/julienschmidt/httprouter v1.3.0 h1:U0609e9tgbseu3rBINet9P48AI/D3oJs4d
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@@ -142,8 +155,8 @@ github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0
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@@ -187,8 +202,8 @@ github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 h1:o4JXh1EVt
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@@ -223,13 +238,12 @@ github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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@@ -246,67 +260,37 @@ github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0/go.mod h1:TTbGUfE+cXXc
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@@ -326,49 +310,25 @@ golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBc
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 golang.org/x/time v0.11.0 h1:/bpjEDfN9tkoN/ryeYHnv5hcMlc8ncjMcM4XBk5NWV0=
 golang.org/x/time v0.11.0/go.mod h1:CDIdPxbZBQxdj6cxyCIdrNogrJKMJ7pr37NYpMcMDSg=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
-golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
-golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
-golang.org/x/tools v0.31.0 h1:0EedkvKDbh+qistFTd0Bcwe/YLh4vHwWEkiI0toFIBU=
-golang.org/x/tools v0.31.0/go.mod h1:naFTU+Cev749tSJRXJlna0T3WxKvb1kWEx15xA4SdmQ=
+golang.org/x/tools v0.33.0 h1:4qz2S3zmRxbGIhDIAgjxvFutSvH5EfnsYrRBj0UI0bc=
+golang.org/x/tools v0.33.0/go.mod h1:CIJMaWEY88juyUfo7UbgPqbC8rU2OqfAV1h2Qp0oMYI=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -382,8 +342,8 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
-google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
+google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
+google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

gui/default/assets/lang/lang-ar.json

@@ -2,7 +2,7 @@
     "A device with that ID is already added.": "أضيف هذا الجهاز بالفعل.",
     "A negative number of days doesn't make sense.": "لا يمكن استخدام قيمة سالبة لعدد الأيام.",
     "A new major version may not be compatible with previous versions.": "الإصدار الجديد قد لا يتوافق مع الإصدارات السابقة.",
-    "API Key": "مفتاح API",
+    "API Key": "مفتاح واجهة برمجة التطبيقات \"API\"",
     "About": "حول",
     "Action": "إجراء",
     "Actions": "الإجراءات",
@@ -27,6 +27,7 @@
     "Allowed Networks": "الشبكات المسموح بها",
     "Alphabetic": "أبجدية",
     "Altered by ignoring deletes.": "تغير بتجاهل عمليات الحذف.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "مفعل دائمًا عندما يكون نوع المجلد هو \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "الإصدار يعالج بواسطة أمر خارجي. يجب إزالة الملف من المجلدات المشتركة. إذا كان المسار للتطبيق يحتوي على مسافات، يجب وضعها بين علامتي تنصيص دلالة على الاقتباس.",
     "Anonymous Usage Reporting": "تقارير الإستخدام المجهولة",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "هل تريد الانتقال الى التصميم الجديد لتقرير الاستخدام المجهول ؟",
@@ -52,6 +53,7 @@
     "Body:": "جسم:",
     "Bugs": "أخطاء برمجية",
     "Cancel": "إلغاء",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "لا يمكن تفعيله عندما يكون نوع المجلد هو \"{{foldertype}}\".",
     "Changelog": "سجل التغيير",
     "Clean out after": "نظف بعد",
     "Cleaning Versions": "إصدارات نظيفة",

gui/default/assets/lang/lang-en-GB.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Allowed Networks",
     "Alphabetic": "Alphabetic",
     "Altered by ignoring deletes.": "Altered by ignoring deletes.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Always turned on when the folder type is \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.",
     "Anonymous Usage Reporting": "Anonymous Usage Reporting",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Anonymous usage report format has changed. Would you like to move to the new format?",
@@ -52,6 +53,7 @@
     "Body:": "Body:",
     "Bugs": "Bugs",
     "Cancel": "Cancel",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "Cannot be enabled when the folder type is \"{{foldertype}}\".",
     "Changelog": "Changelog",
     "Clean out after": "Clean out after",
     "Cleaning Versions": "Cleaning Versions",

gui/default/assets/lang/lang-et.json

@@ -9,9 +9,15 @@
     "Add Folder": "Lisa kaust",
     "Add new folder?": "Lisa uus kaust?",
     "Address": "Aadress",
+    "Addresses": "Aadressid",
+    "All Data": "Kõik andmed",
+    "All Time": "Kõik ajad",
+    "Allowed Networks": "Lubatud võrgud",
     "Alphabetic": "Tähestikuline",
     "Automatic upgrades": "Automaatsed uuendused",
     "Be careful!": "Ettevaatust!",
+    "Cancel": "Loobu",
+    "Changelog": "Muudatuste nimekiri",
     "Close": "Sulge",
     "Configured": "Seadistatud",
     "Connection Error": "Ühenduse viga",

gui/default/assets/lang/lang-fil.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Mga Pinapayagang Network",
     "Alphabetic": "Alpabetiko",
     "Altered by ignoring deletes.": "Binago sa pamamagitan ng hindi pagpansin sa mga pagtanggal.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Palaging nakabukas kung ang uri ng folder ay nakatakda bilang \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Pinapamahala ng external na command ang file versioning. Kailangan nitong tanggalin ang file mula sa binabahaging folder. Kung may mga space ang path sa application, kailangan itong i-quote.",
     "Anonymous Usage Reporting": "Anonymous na Pag-uulat ng Paggamit",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Nagbago ang pormat ng anonymous na ulat ng paggamit. Gusto mo bang lumipat sa bagong pormat?",
@@ -52,6 +53,7 @@
     "Body:": "Body:",
     "Bugs": "Mga Bug",
     "Cancel": "Kanselahin",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "Hindi maaaring paganahin kapag ang uri ng folder ay \"{{foldertype}}\".",
     "Changelog": "Mga Pagbabago",
     "Clean out after": "Linisin pagkatapos",
     "Cleaning Versions": "Mga Bersyon ng Paglinis",
@@ -311,7 +313,7 @@
     "Receive Encrypted": "Makatanggap Naka-Encrypt",
     "Receive Only": "Makatanggap Lamang",
     "Received data is already encrypted": "Naka-encrypt na ang natanggap na data",
-    "Recent Changes": "Mga Kamakilang Pagbabago",
+    "Recent Changes": "Mga Kamakailang Pagbabago",
     "Reduced by ignore patterns": "Binabawasan ng mga ignore pattern",
     "Relay LAN": "Relay na LAN",
     "Relay WAN": "Relay na WAN",

gui/default/assets/lang/lang-ga.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Líonraí Ceadaithe",
     "Alphabetic": "Aibítreach",
     "Altered by ignoring deletes.": "Athraithe trí neamhaird a dhéanamh ar scriosadh.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Cuirtear ar siúl i gcónaí é nuair is é \"{{foldertype}}\" an cineál fillteáin.",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Láimhseálann ordú seachtrach an leagan. Caithfidh sé an comhad a bhaint den fhillteán comhroinnte. Má tá spásanna sa chosán chuig an bhfeidhmchlár, ba chóir é a lua.",
     "Anonymous Usage Reporting": "Tuairisciú Úsáide Gan Ainm",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Tá athrú tagtha ar fhormáid na tuarascála úsáide gan ainm. Ar mhaith leat bogadh go dtí an fhormáid nua?",
@@ -52,6 +53,7 @@
     "Body:": "Comhlacht:",
     "Bugs": "Fabhtanna",
     "Cancel": "Cuir ar ceal",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "Ní féidir é a chumasú nuair is é \"{{foldertype}}\" an cineál fillteáin.",
     "Changelog": "ChangelogName",
     "Clean out after": "Glan amach tar éis",
     "Cleaning Versions": "Leaganacha Glantacháin",

gui/default/assets/lang/lang-ko-KR.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "허가된 망",
     "Alphabetic": "가나다순",
     "Altered by ignoring deletes.": "삭제 항목 무시로 변경됨",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "{{foldertype}} 폴더 유형일 때는 항상 활성화되어 있습니다.",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "외부 명령이 파일 버전을 관리합니다. 공유 폴더에서 파일을 삭제해야 합니다. 응용 프로그램의 경로에 공백이 있으면 따옴표로 묶어야 합니다.",
     "Anonymous Usage Reporting": "익명 사용 보고",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "익명 사용 보고의 형식이 변경되었습니다. 새 형식으로 설정을 변경하시겠습니까?",
@@ -52,6 +53,7 @@
     "Body:": "내용:",
     "Bugs": "버그",
     "Cancel": "취소",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "{{foldertype}} 폴더 유형일 때는 활성화할 수 없습니다.",
     "Changelog": "변경 기록",
     "Clean out after": "보관 기간",
     "Cleaning Versions": "버전 정리",

gui/default/assets/lang/lang-ro-RO.json

@@ -26,6 +26,7 @@
     "Allow Anonymous Usage Reporting?": "Permiteţi raportarea anonimă de folosire a aplicaţiei?",
     "Allowed Networks": "Rețele permise",
     "Alphabetic": "Alfabetic",
+    "Altered by ignoring deletes.": "Modificat prin ignorarea ștergerilor.",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "O comandă externă gestionează versiunea. Trebuie să elimine fișierul din mapa partajat. Dacă calea către aplicație conține spații, ar trebui să fie pusă între ghilimele.",
     "Anonymous Usage Reporting": "Raport Anonim despre Folosirea Aplicației",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Formatul raportului de utilizare anonim s-a schimbat. Doriți să vă mutați în noul format?",
@@ -143,7 +144,6 @@
     "Error": "Eroare",
     "External File Versioning": "Administrare externă a versiunilor documentului",
     "Failed Items": "Failed Items",
-    "Failed to setup, retrying": "Failed to setup, retrying",
     "Failure to connect to IPv6 servers is expected if there is no IPv6 connectivity.": "Failure to connect to IPv6 servers is expected if there is no IPv6 connectivity.",
     "File Pull Order": "File Pull Order",
     "File Versioning": "Versiune Fișier",

gui/default/assets/lang/lang-ru.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Разрешённые сети",
     "Alphabetic": "По алфавиту",
     "Altered by ignoring deletes.": "Изменено, игнорируя удаления.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Всегда включено для папок с типом «{{foldertype}}».",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Для версионирования используется внешняя программа. Ей нужно удалить файл из общей папки. Если путь к приложению содержит пробелы, его нужно взять в кавычки.",
     "Anonymous Usage Reporting": "Анонимный отчет об использовании",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Формат анонимных отчётов изменился. Хотите переключиться на новый формат?",
@@ -52,6 +53,7 @@
     "Body:": "Тело:",
     "Bugs": "Ошибки",
     "Cancel": "Отмена",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "Не может быть включено для папок с типом «{{foldertype}}».",
     "Changelog": "Журнал изменений",
     "Clean out after": "Очистить после",
     "Cleaning Versions": "Очистка версий",
@@ -171,8 +173,8 @@
     "Folder Path": "Путь к папке",
     "Folder Status": "Статус папки",
     "Folder Type": "Тип папки",
-    "Folder type \"{%receiveEncrypted%}\" can only be set when adding a new folder.": "Тип папки «{{receiveEncrypted}}» может быть указан только при создании новой папки.",
-    "Folder type \"{%receiveEncrypted%}\" cannot be changed after adding the folder. You need to remove the folder, delete or decrypt the data on disk, and add the folder again.": "Тип папки «{{receiveEncrypted}}» не может быть изменён после добавления. Вам необходимо убрать папку, удалить или дешифровать данные на диске, а затем снова добавить папку.",
+    "Folder type \"{%receiveEncrypted%}\" can only be set when adding a new folder.": "Тип папки «{{receiveEncrypted}}» может быть выбран только при добавлении новой папки.",
+    "Folder type \"{%receiveEncrypted%}\" cannot be changed after adding the folder. You need to remove the folder, delete or decrypt the data on disk, and add the folder again.": "Тип папки «{{receiveEncrypted}}» не может быть изменён после добавления. Вам необходимо убрать папку, удалить или дешифровать данные на диске и затем снова её добавить.",
     "Folders": "Папки",
     "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.": "Для следующих папок произошла ошибка при запуске отслеживания изменений. Попытки будут повторяться раз в минуту, и ошибки скоро могут быть устранены. Если этого не произойдёт, попробуйте разобраться в причинах и попросите поддержки, если у вас не получится.",
     "Forever": "Вечно",

gui/default/assets/lang/lang-sr.json

@@ -0,0 +1,36 @@
+{
+    "A device with that ID is already added.": "Уређај са тим идентификатором је већ додат.",
+    "A negative number of days doesn't make sense.": "Негативан број дана нема смисла.",
+    "A new major version may not be compatible with previous versions.": "Нова верзија можда неће радити са претходним верзијама.",
+    "API Key": "АПИ кључ",
+    "About": "Информације",
+    "Action": "Радња",
+    "Actions": "Радње",
+    "Active filter rules": "Активна правила филтера",
+    "Add": "Додај",
+    "Add Device": "Додај уређај",
+    "Add Folder": "Додај фасциклу",
+    "Add Remote Device": "Додаај удаљени уређај",
+    "Add devices from the introducer to our device list, for mutually shared folders.": "Додај уређаје од иницијатора на нашу листу уређаја, за међусобно дељене фасцикле.",
+    "Add filter entry": "Додај ставку филтера",
+    "Add ignore patterns": "Додај правила за игнорисање",
+    "Add new folder?": "Додај нову фасциклу?",
+    "Additionally the full rescan interval will be increased (times 60, i.e. new default of 1h). You can also configure it manually for every folder later after choosing No.": "Додатно, интервал потпуног поновног скенирања ће бити повећан (60 пута, тј. нови подразумевани интервал од 1 сат). Такође можете ручно да га подесите за сваку фасциклу касније након што изаберете Не.",
+    "Address": "Адреса",
+    "Addresses": "Адресе",
+    "Advanced": "Напредно",
+    "Advanced Configuration": "Напредна конфигурација",
+    "All Data": "Сви подаци",
+    "All Time": "Све време",
+    "All folders shared with this device must be protected by a password, such that all sent data is unreadable without the given password.": "Све фасцикле које се деле са овим уређајем морају бити заштићене лозинком, тако да сви послати подаци не могу бити прочитани без дате лозинке.",
+    "Allow Anonymous Usage Reporting?": "Дозволити анонимно слање података о коришћењу?",
+    "Allowed Networks": "Дозвољене мреже",
+    "Alphabetic": "Абецедним редом",
+    "Altered by ignoring deletes.": "Промењено због игнорисања брисања.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Увек укључено када је тип фасцикле „{{foldertype}}\".",
+    "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Екстерна команда управља верзионирањем. Она мора да уклони фајл из дељене фасцикле. Ако путања до апликације садржи размаке, треба да буде под наводницима.",
+    "Anonymous Usage Reporting": "Анонимно слање података о употреби",
+    "Anonymous usage report format has changed. Would you like to move to the new format?": "Формат анонимног слања података о коришћењу је промењен. Желите ли да пређете на нови формат?",
+    "Applied to LAN": "Важи за локалну мрежу",
+    "Apply": "Примени"
+}

gui/default/assets/lang/lang-sv.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Tillåtna nätverk",
     "Alphabetic": "Alfabetisk",
     "Altered by ignoring deletes.": "Ändrad genom att ignorera borttagningar.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Alltid på när mapptypen är \"{{foldertype}}\".",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Ett externt kommando hanterar versionen. Det måste ta bort filen från den delade mappen. Om sökvägen till applikationen innehåller mellanslag bör den citeras.",
     "Anonymous Usage Reporting": "Anonym användarstatistiksrapportering",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Anonymt användningsrapportformat har ändrats. Vill du flytta till det nya formatet?",
@@ -52,6 +53,7 @@
     "Body:": "Meddelande:",
     "Bugs": "Felrapporter",
     "Cancel": "Avbryt",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "Kan inte aktiveras när mapptypen är \"{{foldertype}}\".",
     "Changelog": "Ändringslogg",
     "Clean out after": "Rensa efteråt",
     "Cleaning Versions": "Rensningsversioner",

gui/default/assets/lang/lang-uk.json

@@ -27,6 +27,7 @@
     "Allowed Networks": "Дозволені мережі",
     "Alphabetic": "За абеткою",
     "Altered by ignoring deletes.": "Змінено, ігноруючи видалення.",
+    "Always turned on when the folder type is \"{%foldertype%}\".": "Завжди вмикається, якщо тип теки «{{foldertype}}».",
     "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Зовнішня команда керує версіями. Вона повинна видалити файл із спільної теки. Якщо шлях до застосунку містить пробіли, його слід взяти в лапки.",
     "Anonymous Usage Reporting": "Анонімне звітування про використання",
     "Anonymous usage report format has changed. Would you like to move to the new format?": "Формат анонімного звітування про використання змінився. Бажаєте перейти на новий формат?",
@@ -52,6 +53,7 @@
     "Body:": "Повідомлення:",
     "Bugs": "Помилки",
     "Cancel": "Скасувати",
+    "Cannot be enabled when the folder type is \"{%foldertype%}\".": "Неможливо ввімкнути, якщо тип теки «{{foldertype}}».",
     "Changelog": "Журнал змін",
     "Clean out after": "Очистити після",
     "Cleaning Versions": "Очищення версій",
@@ -550,6 +552,6 @@
     },
     "unknown device": "невідомий пристрій",
     "{%device%} wants to share folder \"{%folder%}\".": "{{device}} хоче поділитися папкою \"{{folder}}\".",
-    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} хоче поділитися папкою \"{{folderLabel}}\" ({{folder}}).",
+    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} хоче поділитися текою \"{{folderlabel}}\" ({{folder}}).",
     "{%reintroducer%} might reintroduce this device.": "{{reintroducer}} може повторно порекомендувати цей пристрій."
 }

gui/default/syncthing/core/aboutModalView.html

@@ -30,7 +30,7 @@
         <h4 class="text-center" translate>The Syncthing Authors</h4>
         <div class="row">
           <div class="col-md-12" id="contributor-list">
-Jakob Borg, Audrius Butkevicius, Jesse Lucas, Simon Frei, Tomasz Wilczyński, Alexander Graf, Alexandre Viau, Anderson Mesquita, André Colomb, Antony Male, Ben Schulz, Caleb Callaway, Daniel Harte, Emil Lundberg, Eric P, Evgeny Kuznetsov, Lars K.W. Gohlke, Lode Hoste, Michael Ploujnikov, Nate Morrison, Philippe Schommers, Ross Smith II, Ryan Sullivan, Sergey Mishin, Stefan Tatschner, Wulf Weich, bt90, greatroar, Aaron Bieber, Adam Piggott, Adel Qalieh, Alan Pope, Alberto Donato, Aleksey Vasenev, Alessandro G., Alex Ionescu, Alex Lindeman, Alex Xu, Alexander Seiler, Alexandre Alves, Aman Gupta, Anatoli Babenia, Andreas Sommer, Andrew Dunham, Andrew Meyer, Andrew Rabert, Andrey D, Anjan Momi, Anthony Goeckner, Antoine Lamielle, Anur, Aranjedeath, Arkadiusz Tymiński, Aroun, Arthur Axel fREW Schmidt, Artur Zubilewicz, Aurélien Rainone, BAHADIR YILMAZ, Bart De Vries, Beat Reichenbach, Ben Curthoys, Ben Shepherd, Ben Sidhom, Benedikt Heine, Benedikt Morbach, Benjamin Nater, Benno Fünfstück, Benny Ng, Boqin Qin, Boris Rybalkin, Brandon Philips, Brendan Long, Brian R. Becker, Carsten Hagemann, Catfriend1, Cathryne Linenweaver, Cedric Staniewski, Chih-Hsuan Yen, Choongkyu, Chris Howie, Chris Joel, Chris Tonkinson, Christian Kujau, Christian Prescott, Colin Kennedy, Cromefire_, Cyprien Devillez, Dale Visser, Dan, Daniel Barczyk, Daniel Bergmann, Daniel Martí, Daniel Padrta, Darshil Chanpura, David Rimmer, DeflateAwning, Denis A., Dennis Wilson, DerRockWolf, Devon G. Redekopp, Dimitri Papadopoulos Orfanos, Dmitry Saveliev, Domenic Horner, Dominik Heidler, Elias Jarlebring, Elliot Huffman, Emil Hessman, Eng Zer Jun, Eric Lesiuta, Erik Meitner, Evan Spensley, Federico Castagnini, Felix, Felix Ableitner, Felix Lampe, Felix Unterpaintner, Francois-Xavier Gsell, Frank Isemann, Gahl Saraf, Gilli Sigurdsson, Gleb Sinyavskiy, Graham Miln, Greg, Gusted, Han Boetes, HansK-p, Harrison Jones, Heiko Zuerker, Hireworks, Hugo Locurcio, Iain Barnett, Ian Johnson, Ikko Ashimine, Ilya Brin, Iskander Sharipov, Jaakko Hannikainen, Jacek Szafarkiewicz, Jack Croft, Jacob, Jake Peterson, James O'Beirne, James Patterson, Jaroslav Lichtblau, Jaroslav Malec, Jaspitta, Jauder Ho, Jaya Chithra, Jaya Kumar, Jeffery To, Jens Diemer, Jerry Jacobs, Jochen Voss, Johan Andersson, Johan Vromans, John Rinehart, Jonas Thelemann, Jonathan, Jonathan Cross, Jonta, Jose Manuel Delicado, Julian Lehrhuber, Jörg Thalheim, Jędrzej Kula, K.B.Dharun Krishna, Kalle Laine, Kapil Sareen, Karol Różycki, Kebin Liu, Keith Harrison, Keith Turner, Kelong Cong, Ken'ichi Kamada, Kevin Allen, Kevin Bushiri, Kevin White, Jr., Kurt Fitzner, LSmithx2, Lars Lehtonen, Laurent Arnoud, Laurent Etiemble, Leo Arias, Liu Siyuan, Lord Landon Agahnim, Lukas Lihotzki, Luke Hamburg, Majed Abdulaziz, Marc Laporte, Marc Pujol, Marcin Dziadus, Marcus B Spencer, Marcus Legendre, Mario Majila, Mark Pulford, Martchus, Martin Polehla, Mateusz Naściszewski, Mateusz Ż, Matic Potočnik, Matt Burke, Matt Robenolt, Matteo Ruina, Maurizio Tomasi, Max, Max Schulze, MaximAL, Maxime Thirouin, Maximilian, MichaIng, Michael Jephcote, Michael Rienstra, Michael Tilli, Migelo, Mike Boone, MikeLund, MikolajTwarog, Mingxuan Lin, Naveen, Nicholas Rishel, Nick Busey, Nico Stapelbroek, Nicolas Braud-Santoni, Nicolas Perraut, Niels Peter Roest, Nils Jakobi, NinoM4ster, Nitroretro, NoLooseEnds, Oliver Freyermuth, Otiel, Oyebanji Jacob Mayowa, Pablo, Pascal Jungblut, Paul Brit, Pawel Palenica, Paweł Rozlach, Peter Badida, Peter Dave Hello, Peter Hoeg, Peter Marquardt, Phani Rithvij, Phil Davis, Phill Luby, Pier Paolo Ramon, Piotr Bejda, Pramodh KP, Quentin Hibon, Rahmi Pruitt, Richard Hartmann, Robert Carosi, Roberto Santalla, Robin Schoonover, Roman Zaynetdinov, Ruslan Yevdokymov, Ryan Qian, Sacheendra Talluri, Scott Klupfel, Sertonix, Severin von Wnuck-Lipinski, Shaarad Dalvi, Simon Mwepu, Simon Pickup, Sly_tom_cat, Sonu Kumar Saw, Stefan Kuntz, Steven Eckhoff, Suhas Gundimeda, Sven Bachmann, Taylor Khan, Terrance, Thomas, Thomas Hipp, Tim Abell, Tim Howes, Tim Nordenfur, Tobias Frölich, Tobias Klauser, Tobias Nygren, Tobias Tom, Tom Jakubowski, Tommy Thorn, Tommy van der Vorst, Tully Robinson, Tyler Brazier, Tyler Kropp, Unrud, Veeti Paananen, Victor Buinsky, Vik, Vil Brekin, Vladimir Rusinov, WangXi, Will Rouesnel, William A. Kennington III, Xavier O., Yannic A., andresvia, andyleap, boomsquared, chenrui, chucic, cjc7373, cui fliter, d-volution, dashangcun, derekriemer, desbma, diemade, digital, entity0xfe, georgespatton, ghjklw, guangwu, gudvinr, ignacy123, janost, jaseg, jelle van der Waa, jtagcat, klemens, kylosus, luchenhan, luzpaz, marco-m, mathias4833, maxice8, mclang, mv1005, nf, orangekame3, otbutz, overkill, perewa, polyfloyd, red_led, rubenbe, sec65, vapatel2, villekalliomaki, wangguoliang, wouter bolsterlee, xarx00, xjtdy888, 佛跳墙, 落心
+Jakob Borg, Audrius Butkevicius, Jesse Lucas, Simon Frei, Tomasz Wilczyński, Alexander Graf, Alexandre Viau, Anderson Mesquita, André Colomb, Antony Male, Ben Schulz, Caleb Callaway, Daniel Harte, Emil Lundberg, Eric P, Evgeny Kuznetsov, Lars K.W. Gohlke, Lode Hoste, Michael Ploujnikov, Nate Morrison, Philippe Schommers, Ross Smith II, Ryan Sullivan, Sergey Mishin, Stefan Tatschner, Wulf Weich, bt90, greatroar, Aaron Bieber, Adam Piggott, Adel Qalieh, Alan Pope, Alberto Donato, Aleksey Vasenev, Alessandro G., Alex Ionescu, Alex Lindeman, Alex Xu, Alexander Seiler, Alexandre Alves, Aman Gupta, Anatoli Babenia, Andreas Sommer, Andrew Dunham, Andrew Meyer, Andrew Rabert, Andrey D, Anjan Momi, Anthony Goeckner, Antoine Lamielle, Anur, Aranjedeath, Arkadiusz Tymiński, Aroun, Arthur Axel fREW Schmidt, Artur Zubilewicz, Ashish Bhate, Aurélien Rainone, BAHADIR YILMAZ, Bart De Vries, Beat Reichenbach, Ben Curthoys, Ben Shepherd, Ben Sidhom, Benedikt Heine, Benedikt Morbach, Benjamin Nater, Benno Fünfstück, Benny Ng, Boqin Qin, Boris Rybalkin, Brandon Philips, Brendan Long, Brian R. Becker, Carsten Hagemann, Catfriend1, Cathryne Linenweaver, Cedric Staniewski, Chih-Hsuan Yen, Choongkyu, Chris Howie, Chris Joel, Chris Tonkinson, Christian Kujau, Christian Prescott, Colin Kennedy, Cromefire_, Cyprien Devillez, Dale Visser, Dan, Daniel Barczyk, Daniel Bergmann, Daniel Martí, Daniel Padrta, Darshil Chanpura, David Rimmer, DeflateAwning, Denis A., Dennis Wilson, DerRockWolf, Devon G. Redekopp, Dimitri Papadopoulos Orfanos, Dmitry Saveliev, Domenic Horner, Dominik Heidler, Elias Jarlebring, Elliot Huffman, Emil Hessman, Eng Zer Jun, Eric Lesiuta, Erik Meitner, Evan Spensley, Federico Castagnini, Felix, Felix Ableitner, Felix Lampe, Felix Unterpaintner, Francois-Xavier Gsell, Frank Isemann, Gahl Saraf, Gilli Sigurdsson, Gleb Sinyavskiy, Graham Miln, Greg, Gusted, Han Boetes, HansK-p, Harrison Jones, Hazem Krimi, Heiko Zuerker, Hireworks, Hugo Locurcio, Iain Barnett, Ian Johnson, Ikko Ashimine, Ilya Brin, Iskander Sharipov, Jaakko Hannikainen, Jacek Szafarkiewicz, Jack Croft, Jacob, Jake Peterson, James O'Beirne, James Patterson, Jaroslav Lichtblau, Jaroslav Malec, Jaspitta, Jauder Ho, Jaya Chithra, Jaya Kumar, Jeffery To, Jens Diemer, Jerry Jacobs, Jochen Voss, Johan Andersson, Johan Vromans, John Rinehart, Jonas Thelemann, Jonathan, Jonathan Cross, Jonta, Jose Manuel Delicado, Julian Lehrhuber, Jörg Thalheim, Jędrzej Kula, K.B.Dharun Krishna, Kalle Laine, Kapil Sareen, Karol Różycki, Kebin Liu, Keith Harrison, Keith Turner, Kelong Cong, Ken'ichi Kamada, Kevin Allen, Kevin Bushiri, Kevin White, Jr., Kurt Fitzner, LSmithx2, Lars Lehtonen, Laurent Arnoud, Laurent Etiemble, Leo Arias, Liu Siyuan, Lord Landon Agahnim, Lukas Lihotzki, Luke Hamburg, Majed Abdulaziz, Marc Laporte, Marc Pujol, Marcel Meyer, Marcin Dziadus, Marcus B Spencer, Marcus Legendre, Mario Majila, Mark Pulford, Martchus, Martin Polehla, Mateusz Naściszewski, Mateusz Ż, Matic Potočnik, Matt Burke, Matt Robenolt, Matteo Ruina, Maurizio Tomasi, Max, Max Schulze, MaximAL, Maxime Thirouin, Maximilian, MichaIng, Michael Jephcote, Michael Rienstra, Michael Tilli, Migelo, Mike Boone, MikeLund, MikolajTwarog, Mingxuan Lin, Naveen, Nicholas Rishel, Nick Busey, Nico Stapelbroek, Nicolas Braud-Santoni, Nicolas Perraut, Niels Peter Roest, Nils Jakobi, NinoM4ster, Nitroretro, NoLooseEnds, Oliver Freyermuth, Otiel, Oyebanji Jacob Mayowa, Pablo, Pascal Jungblut, Paul Brit, Paul Donald, Pawel Palenica, Paweł Rozlach, Peter Badida, Peter Dave Hello, Peter Hoeg, Peter Marquardt, Phani Rithvij, Phil Davis, Phill Luby, Pier Paolo Ramon, Piotr Bejda, Pramodh KP, Quentin Hibon, Rahmi Pruitt, Richard Hartmann, Robert Carosi, Roberto Santalla, Robin Schoonover, Roman Zaynetdinov, Ruslan Yevdokymov, Ryan Qian, Sacheendra Talluri, Scott Klupfel, Sertonix, Severin von Wnuck-Lipinski, Shaarad Dalvi, Simon Mwepu, Simon Pickup, Sly_tom_cat, Sonu Kumar Saw, Stefan Kuntz, Steven Eckhoff, Suhas Gundimeda, Sven Bachmann, Sébastien WENSKE, Taylor Khan, Terrance, TheCreeper, Thomas, Thomas Hipp, Tim Abell, Tim Howes, Tim Nordenfur, Tobias Frölich, Tobias Klauser, Tobias Nygren, Tobias Tom, Tom Jakubowski, Tommy Thorn, Tommy van der Vorst, Tully Robinson, Tyler Brazier, Tyler Kropp, Unrud, Veeti Paananen, Victor Buinsky, Vik, Vil Brekin, Vladimir Rusinov, WangXi, Will Rouesnel, William A. Kennington III, Xavier O., Yannic A., andresvia, andyleap, boomsquared, chenrui, chucic, cjc7373, cui fliter, d-volution, dashangcun, derekriemer, desbma, diemade, digital, domain, entity0xfe, georgespatton, ghjklw, guangwu, gudvinr, ignacy123, janost, jaseg, jelle van der Waa, jtagcat, klemens, kylosus, luchenhan, luzpaz, marco-m, mathias4833, maxice8, mclang, mv1005, nf, orangekame3, otbutz, overkill, perewa, polyfloyd, pullmerge, red_led, rubenbe, sec65, vapatel2, villekalliomaki, wangguoliang, wouter bolsterlee, xarx00, xjtdy888, 佛跳墙, 落心
           </div>
         </div>
       </div>
@@ -38,45 +38,70 @@ Jakob Borg, Audrius Butkevicius, Jesse Lucas, Simon Frei, Tomasz Wilczyński, Al
       <div id="about-includes" class="tab-pane">
         <p translate>Syncthing includes the following software or portions thereof:</p>
         <ul class="list-unstyled two-columns" id="copyright-notices">
-          <li><a href="http://getbootstrap.com/">Bootstrap</a>, Copyright &copy; 2011-2016 Twitter, Inc.</li>
+          <li><a href="https://getbootstrap.com/">Bootstrap</a>, Copyright &copy; 2011-2016 Twitter, Inc.</li>
           <li><a href="https://angularjs.org/">AngularJS</a>, Copyright &copy; 2010-2014, 2016 Google, Inc.</li>
-          <li><a href="http://www.daterangepicker.com/">Date Range Picker</a>, Copyright &copy; 2012-2018 Dan Grossman.</li>
+          <li><a href="https://www.daterangepicker.com/">Date Range Picker</a>, Copyright &copy; 2012-2018 Dan Grossman.</li>
           <li><a href="https://github.com/mar10/fancytree">JQuery Fancytree Plugin</a>, Copyright &copy; 2008-2018 Martin Wendt.</li>
+          <li><a href="https://fontawesome.com/">Font Awesome</a>Copyright &copy; 2024 Fonticons, Inc.</li>
           <li><a href="https://forkaweso.me/Fork-Awesome/">Fork Awesome</a>, Copyright &copy; 2018 Dave Gandy &amp; Fork Awesome.</li>
-          <li><a href="http://jquery.com/">jQuery JavaScript Library</a>, Copyright &copy; jQuery Foundation and other contributors.</li>
-          <li><a href="http://momentjs.com/">moment.js</a>, Copyright &copy; JS Foundation and other contributors.</li>
+          <li><a href="https://evanhahn.github.io/HumanizeDuration.js/">HumanDuration.js</a>, Copyright &copy; 2013-2024 Evan Hahn, portions copyright &copy; 2024 Ross Smith II.</li>
+          <li><a href="https://jquery.com/">jQuery JavaScript Library</a>, Copyright &copy; jQuery Foundation and other contributors.</li>
+          <li><a href="https://leafletjs.com/">leaflet.js</a>, Copyright &copy; 2010-2025 Volodymyr Agafonkin, Copyright &copy; 2010-2011 CloudMade.</li>
+          <li><a href="https://momentjs.com/">moment.js</a>, Copyright &copy; JS Foundation and other contributors.</li>
+          <li><a href="https://golang.org/">The Go Programming Language</a>, Copyright &copy; 2009 The Go Authors.</li>
           <li><a href="https://prometheus.io/">Prometheus</a>, Copyright &copy; 2012-2015 The Prometheus Authors.</li>
-          <li><a href="https://github.com/AudriusButkevicius/go-nat-pmp">AudriusButkevicius/go-nat-pmp</a>, Copyright &copy; 2013 John Howard Palevich.</li>
           <li><a href="https://github.com/AudriusButkevicius/recli">AudriusButkevicius/recli</a>, Copyright &copy; 2019 Audrius Butkevicius.</li>
+          <li><a href="https://github.com/Azure/go-ntlmssp">Azure/go-ntlmssp</a>, Copyright &copy; 2016 Microsoft.</li>
+          <li><a href="https://github.com/alecthomas/kong">alecthomas/kong</a>, Copyright &copy; 2018 Alec Thomas.</li>
           <li><a href="https://github.com/beorn7/perks">beorn7/perks</a>, Copyright &copy; 2013 Blake Mizerany.</li>
-          <li><a href="https://github.com/pierrec/lz4">pierrec/lz4</a>, Copyright &copy; 2015 Pierre Curto.</li>
-          <li><a href="https://github.com/calmh/du">calmh/du</a>, Public domain.</li>
+          <li><a href="https://github.com/calmh/incontainer">calmh/incontainer</a>, Copyright &copy; 2022 calmh.</li>
           <li><a href="https://github.com/calmh/xdr">calmh/xdr</a>, Copyright &copy; 2014 Jakob Borg.</li>
+          <li><a href="https://github.com/ccding/go-stun">ccding/go-stun</a>, Copyright &copy; 2016 Cong Ding.</li>
+          <li><a href="https://github.com/cespare/xxhash/v2">cespare/xxhash/v2</a>, Copyright &copy; 2016 Caleb Spare.</li>
           <li><a href="https://github.com/chmduquesne/rollinghash">chmduquesne/rollinghash</a>, Copyright &copy; 2015 Christophe-Marie Duquesne.</li>
-          <li><a href="https://github.com/d4l3k/messagediff">d4l3k/messagediff</a>, Copyright &copy; 2015 Tristan Rice.</li>
+          <li><a href="https://github.com/cpuguy83/go-md2man/v2">cpuguy83/go-md2man/v2</a>, Copyright &copy; 2014 Brian Goff.</li>
+          <li><a href="https://github.com/davecgh/go-spew">davecgh/go-spew</a>, Copyright &copy; 2012-2016 Dave Collins.</li>
+          <li><a href="https://github.com/go-asn1-ber/asn1-ber">go-asn1-ber/asn1-ber</a>, Copyright &copy; 2011-2015 Michael Mitton (mmitton@gmail.com).</li>
+          <li><a href="https://github.com/go-ldap/ldap">go-ldap/ldap</a>, Copyright &copy; 2011-2015 Michael Mitton (mmitton@gmail.com).</li>
+          <li><a href="https://github.com/uber-go/automaxprocs">go.uber.org/automaxprocs</a>, Copyright &copy; 2017 Uber Technologies, Inc.</li>
           <li><a href="https://github.com/gobwas/glob">gobwas/glob</a>, Copyright &copy; 2016 Sergey Kamardin.</li>
-          <li><a href="https://github.com/golang/groupcache">golang/groupcache</a>, Copyright &copy; 2013 Google Inc.</li>
-          <li><a href="https://github.com/golang/protobuf">golang/protobuf</a>, Copyright &copy; 2010 The Go Authors.</li>
+          <li><a href="https://github.com/gofrs/flock">gofrs/flock</a>, Copyright &copy; 2018-2025, The Gofrs.</li>
           <li><a href="https://github.com/golang/snappy">golang/snappy</a>, Copyright &copy; 2011 The Snappy-Go Authors.</li>
+          <li><a href="https://github.com/protocolbuffers/protobuf-go">google.golang.org/protobuf</a>, Copyright &copy; 2018 The Go Authors.</li>
+          <li><a href="https://github.com/google/uuid">google/uuid</a>, Copyright &copy; 2009,2014 Google Inc.</li>
+          <li><a href="https://gopkg.in/yaml.v3">gopkg.in/yaml.v3</a>, Copyright &copy; 2025, the gopkg.in/yaml.v3 authors.</li>
+          <li><a href="https://github.com/greatroar/blobloom">greatroar/blobloom</a>, Copyright &copy; 2020-2024 the Blobloom authors.</li>
+          <li><a href="https://github.com/hashicorp/errwrap">hashicorp/errwrap</a>, Copyright &copy; 2014 HashiCorp, Inc.</li>
+          <li><a href="https://github.com/hashicorp/go-multierror">hashicorp/go-multierror</a>, Copyright &copy; 2014 HashiCorp, Inc.</li>
+          <li><a href="https://github.com/hashicorp/golang-lru">hashicorp/golang-lru</a>, Copyright &copy; 2014 HashiCorp, Inc.</li>
           <li><a href="https://github.com/jackpal/gateway">jackpal/gateway</a>, Copyright &copy; 2010 Jack Palevich.</li>
+          <li><a href="https://github.com/jackpal/go-nat-pmp">jackpal/go-nat-pmp</a>, Copyright 2013 John Howard Palevich.</li>
+          <li><a href="https://github.com/julienschmidt/httprouter">julienschmidt/httprouter</a>, Copyright &copy; 2013, Julien Schmidt.</li>
           <li><a href="https://github.com/kballard/go-shellquote">kballard/go-shellquote</a>, Copyright &copy; 2014 Kevin Ballard.</li>
-          <li><a href="https://github.com/mattn/go-isatty">mattn/go-isatty</a>, Copyright &copy; Yasuhiro MATSUMOTO.</li>
-          <li><a href="https://github.com/matttproud/golang_protobuf_extensions">matttproud/golang_protobuf_extensions</a>, Copyright &copy; 2012 Matt T. Proud.</li>
-          <li><a href="https://github.com/oschwald/geoip2-golang">oschwald/geoip2-golang</a>, Copyright &copy; 2015, Gregory J. Oschwald.</li>
-          <li><a href="https://github.com/oschwald/maxminddb-golang">oschwald/maxminddb-golang</a>, Copyright &copy; 2015, Gregory J. Oschwald.</li>
-          <li><a href="https://github.com/petermattis/goid">petermattis/goid</a>, Copyright &copy; 2015-2016 Peter Mattis.</li>
+          <li><a href="https://github.com/miscreant/miscreant.go">miscreant/miscreant.go</a>, Copyright &copy; 2017-2019 The Miscreant Developers.</li>
+          <li><a href="https://github.com/munnerz/goautoneg">munnerz/goautoneg</a>, Copyright &copy; 2011, Open Knowledge Foundation Ltd.</li>
+          <li><a href="https://github.com/pierrec/lz4">pierrec/lz4</a>, Copyright &copy; 2015 Pierre Curto.</li>
           <li><a href="https://github.com/pkg/errors">pkg/errors</a>, Copyright &copy; 2015, Dave Cheney.</li>
+          <li><a href="https://github.com/pmezard/go-difflib">pmezard/go-difflib</a>, Copyright &copy; 2013, Patrick Mezard.</li>
+          <li><a href="https://github.com/posener/complete">posener/complete</a>, Copyright &copy; 2017 Eyal Posener.</li>
+          <li><a href="https://github.com/prometheus/client_golang">prometheus/client_golang</a>, Copyright 2012-2015 The Prometheus Authors.</li>
+          <li><a href="https://github.com/prometheus/client_model">prometheus/client_model</a>, Copyright &copy; 2025, the prometheus/client_model authors.</li>
+          <li><a href="https://github.com/prometheus/common">prometheus/common</a>, Copyright &copy; 2025, the prometheus/common authors.</li>
+          <li><a href="https://github.com/prometheus/procfs">prometheus/procfs</a>, Copyright &copy; 2025, the prometheus/procfs authors.</li>
+          <li><a href="https://github.com/quic-go/quic-go">quic-go/quic-go</a>, Copyright &copy; 2016 the quic-go authors & Google, Inc.</li>
           <li><a href="https://github.com/rcrowley/go-metrics">rcrowley/go-metrics</a>, Copyright &copy; 2012 Richard Crowley.</li>
-          <li><a href="https://github.com/sasha-s/go-deadlock">sasha-s/go-deadlock</a>, Copyright &copy; 2016 sasha-s.</li>
-          <li><a href="https://github.com/syncthing/notify">syncthing/notify</a>, Copyright &copy; 2014-2015 The Notify Authors.</li>
+          <li><a href="https://github.com/riywo/loginshell">riywo/loginshell</a>, Copyright &copy; 2019 Ryosuke IWANAGA.</li>
+          <li><a href="https://github.com/russross/blackfriday/v2">russross/blackfriday/v2</a>, Copyright &copy; 2011 Russ Ross.</li>
+          <li><a href="https://github.com/shirou/gopsutil">shirou/gopsutil</a>, Copyright &copy; 2014, WAKAYAMA Shirou.</li>
+          <li><a href="https://github.com/stretchr/objx">stretchr/objx</a>, Copyright &copy; 2014 Stretchr, Inc.</li>
+          <li><a href="https://github.com/stretchr/testify">stretchr/testify</a>, Copyright &copy; 2012-2020 Mat Ryer, Tyler Bunnell and contributors.</li>
           <li><a href="https://github.com/syndtr/goleveldb">syndtr/goleveldb</a>, Copyright &copy; 2012 Suryandaru Triandana.</li>
           <li><a href="https://github.com/thejerf/suture">thejerf/suture</a>, Copyright &copy; 2014-2015 Barracuda Networks, Inc.</li>
-          <li><a href="https://github.com/urfave/cli">urfave/cli</a>, Copyright &copy; 2016 Jeremy Saenz &amp; Contributors.</li>
+          <li><a href="https://github.com/tklauser/go-sysconf">tklauser/go-sysconf</a>, Copyright &copy; 2018-2022, Tobias Klauser.</li>
+          <li><a href="https://github.com/tklauser/numcpus">tklauser/numcpus</a>, Copyright &copy; 2018-2024 Tobias Klauser.</li>
+          <li><a href="https://github.com/urfave/cli">urfave/cli</a>, Copyright &copy; 2016 Jeremy Saenz & Contributors.</li>
           <li><a href="https://github.com/vitrun/qart">vitrun/qart</a>, Copyright &copy; 2010-2011 The Go Authors.</li>
-          <li><a href="https://gopkg.in/asn1-ber.v1">gopkg.in/asn1-ber.v1</a>, Copyright &copy; 2011-2015 Michael Mitton, portions Copyright &copy; 2015-2016 go-asn1-ber Authors.</li>
-          <li><a href="https://gopkg.in/ldap.v2">gopkg.in/ldap.v2</a>, Copyright &copy; 2011-2015 Michael Mitton, portions Copyright &copy; 2015-2016 go-ldap Authors.</li>
-          <li><a href="https://golang.org">The Go Programming Language</a>, Copyright &copy; 2009 The Go Authors.</li>
-          <li>Font Awesome by Dave Gandy - <a href="http://fontawesome.io/">http://fontawesome.io</a></li>
+          <li><a href="https://github.com/willabides/kongplete">willabides/kongplete</a>, Copyright &copy; 2020 WillAbides.</li>
         </ul>
       </div>
 

gui/default/syncthing/core/modalDirective.js

@@ -16,6 +16,14 @@ angular.module('syncthing.core')
             },
             link: function (scope, element, attrs) {
 
+                $(element).on('click', function (event) {
+                    const closestTabAnchor = event.target.closest('a[data-toggle="tab"]');
+
+                    if (closestTabAnchor && closestTabAnchor.href.includes('#')) {
+                        event.preventDefault();
+                    }
+                });
+
                 // before modal show animation
                 $(element).on('show.bs.modal', function () {
 

gui/default/syncthing/core/syncthingController.js

@@ -1165,7 +1165,7 @@ angular.module('syncthing.core')
             }
 
             // Disconnected
-            if (!unused && $scope.deviceStats[deviceCfg.deviceID] && $scope.deviceStats[deviceCfg.deviceID].lastSeenDays && $scope.deviceStats[deviceCfg.deviceID].lastSeenDays >= 7) {
+            if (!unused && $scope.deviceStats[deviceCfg.deviceID] && (!$scope.deviceStats[deviceCfg.deviceID].lastSeenDays || $scope.deviceStats[deviceCfg.deviceID].lastSeenDays >= 7)) {
                 return status + 'disconnected-inactive';
             } else {
                 return status + 'disconnected';

gui/default/syncthing/core/uncamelFilter.js

@@ -1,27 +1,39 @@
 angular.module('syncthing.core')
     .filter('uncamel', function () {
+        const reservedStrings = [
+            'IDs', 'ID', // substrings must come AFTER longer keywords containing them
+            'URL', 'UR',
+            'API', 'QUIC', 'TCP', 'UDP', 'NAT', 'LAN', 'WAN',
+            'KiB', 'MiB', 'GiB', 'TiB'
+        ];
         return function (input) {
-            input = input.replace(/(.)([A-Z][a-z]+)/g, '$1 $2').replace(/([a-z0-9])([A-Z])/g, '$1 $2');
-            var parts = input.split(' ');
-            var lastPart = parts.splice(-1)[0];
+            if (!input || typeof input !== 'string') return '';
+            const placeholders = {};
+            let counter = 0;
+            reservedStrings.forEach(word => {
+                const placeholder = `__RSV${counter}__`;
+                const re = new RegExp(word, 'g');
+                input = input.replace(re, placeholder);
+                placeholders[placeholder] = word;
+                counter++;
+            });
+            input = input.replace(/([a-z0-9])([A-Z])/g, '$1 $2');
+            Object.entries(placeholders).forEach(([ph, word]) => {
+                input = input.replace(new RegExp(ph, 'g'), ` ${word} `);
+            });
+            let parts = input.split(' ');
+            const lastPart = parts.pop();
             switch (lastPart) {
-                case "S":
-                    parts.push('(seconds)');
-                    break;
-                case "M":
-                    parts.push('(minutes)');
-                    break;
-                case "H":
-                    parts.push('(hours)');
-                    break;
-                case "Ms":
-                    parts.push('(milliseconds)');
-                    break;
-                default:
-                    parts.push(lastPart);
-                    break;
+                case 'S': parts.push('(seconds)'); break;
+                case 'M': parts.push('(minutes)'); break;
+                case 'H': parts.push('(hours)'); break;
+                case 'Ms': parts.push('(milliseconds)'); break;
+                default: parts.push(lastPart); break;
             }
-            input = parts.join(' ');
-            return input.charAt(0).toUpperCase() + input.slice(1);
+            parts = parts.map(part => {
+                const match = reservedStrings.find(w => w.toUpperCase() === part.toUpperCase());
+                return match || part.charAt(0).toUpperCase() + part.slice(1);
+            });
+            return parts.join(' ').replace(/\s+/g, ' ').trim();
         };
     });

internal/blob/azureblob/azureblob.go

@@ -0,0 +1,80 @@
+// Copyright (C) 2025 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package azureblob
+
+import (
+	"context"
+	"io"
+	"time"
+
+	stblob "github.com/syncthing/syncthing/internal/blob"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
+	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/blob"
+	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/blockblob"
+	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/container"
+)
+
+var _ stblob.Store = (*BlobStore)(nil)
+
+type BlobStore struct {
+	client    *azblob.Client
+	container string
+}
+
+func NewBlobStore(accountName, accountKey, containerName string) (*BlobStore, error) {
+	credential, err := azblob.NewSharedKeyCredential(accountName, accountKey)
+	if err != nil {
+		return nil, err
+	}
+	url := "https://" + accountName + ".blob.core.windows.net/"
+	sc, err := azblob.NewClientWithSharedKeyCredential(url, credential, &azblob.ClientOptions{})
+	if err != nil {
+		return nil, err
+	}
+	// This errors when the container already exists, which we ignore.
+	_, _ = sc.CreateContainer(context.Background(), containerName, &container.CreateOptions{})
+	return &BlobStore{
+		client:    sc,
+		container: containerName,
+	}, nil
+}
+
+func (a *BlobStore) Upload(ctx context.Context, key string, data io.Reader) error {
+	_, err := a.client.UploadStream(ctx, a.container, key, data, &blockblob.UploadStreamOptions{})
+	return err
+}
+
+func (a *BlobStore) Download(ctx context.Context, key string, w stblob.Writer) error {
+	resp, err := a.client.DownloadStream(ctx, a.container, key, &blob.DownloadStreamOptions{})
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	_, err = io.Copy(w, resp.Body)
+	return err
+}
+
+func (a *BlobStore) LatestKey(ctx context.Context) (string, error) {
+	opts := &azblob.ListBlobsFlatOptions{}
+	pager := a.client.NewListBlobsFlatPager(a.container, opts)
+	var latest string
+	var lastModified time.Time
+	for pager.More() {
+		page, err := pager.NextPage(ctx)
+		if err != nil {
+			return "", err
+		}
+		for _, blob := range page.Segment.BlobItems {
+			if latest == "" || blob.Properties.LastModified.After(lastModified) {
+				latest = *blob.Name
+				lastModified = *blob.Properties.LastModified
+			}
+		}
+	}
+	return latest, nil
+}

internal/blob/interface.go

@@ -0,0 +1,23 @@
+// Copyright (C) 2025 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package blob
+
+import (
+	"context"
+	"io"
+)
+
+type Store interface {
+	Upload(ctx context.Context, key string, r io.Reader) error
+	Download(ctx context.Context, key string, w Writer) error
+	LatestKey(ctx context.Context) (string, error)
+}
+
+type Writer interface {
+	io.Writer
+	io.WriterAt
+}

internal/blob/s3/s3.go

@@ -7,6 +7,7 @@
 package s3
 
 import (
+	"context"
 	"io"
 	"time"
 
@@ -15,8 +16,11 @@ import (
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/aws/aws-sdk-go/service/s3/s3manager"
+	"github.com/syncthing/syncthing/internal/blob"
 )
 
+var _ blob.Store = (*Session)(nil)
+
 type Session struct {
 	bucket string
 	s3sess *session.Session
@@ -29,6 +33,7 @@ func NewSession(endpoint, region, bucket, accessKeyID, secretKey string) (*Sessi
 		Region:           aws.String(region),
 		Endpoint:         aws.String(endpoint),
 		Credentials:      credentials.NewStaticCredentials(accessKeyID, secretKey, ""),
+		S3ForcePathStyle: aws.Bool(true),
 	})
 	if err != nil {
 		return nil, err
@@ -39,7 +44,7 @@ func NewSession(endpoint, region, bucket, accessKeyID, secretKey string) (*Sessi
 	}, nil
 }
 
-func (s *Session) Upload(r io.Reader, key string) error {
+func (s *Session) Upload(_ context.Context, key string, r io.Reader) error {
 	uploader := s3manager.NewUploader(s.s3sess)
 	_, err := uploader.Upload(&s3manager.UploadInput{
 		Bucket: aws.String(s.bucket),
@@ -49,7 +54,31 @@ func (s *Session) Upload(r io.Reader, key string) error {
 	return err
 }
 
-func (s *Session) List(fn func(*Object) bool) error {
+func (s *Session) Download(_ context.Context, key string, w blob.Writer) error {
+	downloader := s3manager.NewDownloader(s.s3sess)
+	_, err := downloader.Download(w, &s3.GetObjectInput{
+		Bucket: aws.String(s.bucket),
+		Key:    aws.String(key),
+	})
+	return err
+}
+
+func (s *Session) LatestKey(_ context.Context) (string, error) {
+	var latestKey string
+	var lastModified time.Time
+	if err := s.list(func(obj *Object) bool {
+		if latestKey == "" || obj.LastModified.After(lastModified) {
+			latestKey = *obj.Key
+			lastModified = *obj.LastModified
+		}
+		return true
+	}); err != nil {
+		return "", err
+	}
+	return latestKey, nil
+}
+
+func (s *Session) list(fn func(*Object) bool) error {
 	svc := s3.New(s.s3sess)
 
 	opts := &s3.ListObjectsV2Input{
@@ -75,27 +104,3 @@ func (s *Session) List(fn func(*Object) bool) error {
 
 	return nil
 }
-
-func (s *Session) LatestKey() (string, error) {
-	var latestKey string
-	var lastModified time.Time
-	if err := s.List(func(obj *Object) bool {
-		if latestKey == "" || obj.LastModified.After(lastModified) {
-			latestKey = *obj.Key
-			lastModified = *obj.LastModified
-		}
-		return true
-	}); err != nil {
-		return "", err
-	}
-	return latestKey, nil
-}
-
-func (s *Session) Download(w io.WriterAt, key string) error {
-	downloader := s3manager.NewDownloader(s.s3sess)
-	_, err := downloader.Download(w, &s3.GetObjectInput{
-		Bucket: aws.String(s.bucket),
-		Key:    aws.String(key),
-	})
-	return err
-}

lib/api/api.go

@@ -8,6 +8,7 @@ package api
 
 import (
 	"bytes"
+	"cmp"
 	"context"
 	"crypto/tls"
 	"crypto/x509"
@@ -24,7 +25,7 @@ import (
 	"reflect"
 	"runtime"
 	"runtime/pprof"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"time"
@@ -750,7 +751,7 @@ func (*service) getSystemVersion(w http.ResponseWriter, _ *http.Request) {
 func (*service) getSystemDebug(w http.ResponseWriter, _ *http.Request) {
 	names := l.Facilities()
 	enabled := l.FacilityDebugging()
-	sort.Strings(enabled)
+	slices.Sort(enabled)
 	sendJSON(w, map[string]interface{}{
 		"facilities": names,
 		"enabled":    enabled,
@@ -1535,8 +1536,8 @@ func (*service) getLang(w http.ResponseWriter, r *http.Request) {
 		langs = append(langs, code)
 	}
 	// Reorder by descending q value
-	sort.SliceStable(langs, func(i, j int) bool {
-		return weights[langs[i]] > weights[langs[j]]
+	slices.SortStableFunc(langs, func(i, j string) int {
+		return cmp.Compare(weights[j], weights[i])
 	})
 	sendJSON(w, langs)
 }
@@ -1822,8 +1823,8 @@ func browseFiles(ffs fs.Filesystem, search string) []string {
 	}
 
 	// sort to return matches in deterministic order (don't depend on file system order)
-	sort.Strings(exactMatches)
-	sort.Strings(caseInsMatches)
+	slices.Sort(exactMatches)
+	slices.Sort(caseInsMatches)
 	return append(exactMatches, caseInsMatches...)
 }
 
@@ -1920,7 +1921,7 @@ func dirNames(dir string) []string {
 		}
 	}
 
-	sort.Strings(dirs)
+	slices.Sort(dirs)
 	return dirs
 }
 

lib/api/api_auth.go

@@ -18,6 +18,7 @@ import (
 	ldap "github.com/go-ldap/ldap/v3"
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/events"
+	"github.com/syncthing/syncthing/lib/osutil"
 	"github.com/syncthing/syncthing/lib/rand"
 )
 
@@ -27,15 +28,54 @@ const (
 	randomTokenLength  = 64
 )
 
-func emitLoginAttempt(success bool, username, address string, evLogger events.Logger) {
-	evLogger.Log(events.LoginAttempt, map[string]interface{}{
+func emitLoginAttempt(success bool, username string, r *http.Request, evLogger events.Logger) {
+	remoteAddress, proxy := remoteAddress(r)
+	evData := map[string]any{
 		"success":       success,
 		"username":      username,
-		"remoteAddress": address,
-	})
-	if !success {
-		l.Infof("Wrong credentials supplied during API authorization from %s", address)
+		"remoteAddress": remoteAddress,
 	}
+	if proxy != "" {
+		evData["proxy"] = proxy
+	}
+	evLogger.Log(events.LoginAttempt, evData)
+
+	if success {
+		return
+	}
+	if proxy != "" {
+		l.Infof("Wrong credentials supplied during API authorization from %s proxied by %s", remoteAddress, proxy)
+	} else {
+		l.Infof("Wrong credentials supplied during API authorization from %s", remoteAddress)
+	}
+}
+
+func remoteAddress(r *http.Request) (remoteAddr, proxy string) {
+	remoteAddr = r.RemoteAddr
+	remoteIP := osutil.IPFromString(r.RemoteAddr)
+
+	// parse X-Forwarded-For only if the proxy connects via unix socket, localhost or a LAN IP
+	var localProxy bool
+	if remoteIP != nil {
+		remoteAddr = remoteIP.String()
+		localProxy = remoteIP.IsLoopback() || remoteIP.IsPrivate() || remoteIP.IsLinkLocalUnicast()
+	} else if remoteAddr == "@" {
+		localProxy = true
+	}
+
+	if !localProxy {
+		return
+	}
+
+	forwardedAddr, _, _ := strings.Cut(r.Header.Get("X-Forwarded-For"), ",")
+	forwardedAddr = strings.TrimSpace(forwardedAddr)
+	forwardedIP := osutil.IPFromString(forwardedAddr)
+
+	if forwardedIP != nil {
+		proxy = remoteAddr
+		remoteAddr = forwardedIP.String()
+	}
+	return
 }
 
 func antiBruteForceSleep() {
@@ -51,7 +91,7 @@ func forbidden(w http.ResponseWriter) {
 	http.Error(w, "Forbidden", http.StatusForbidden)
 }
 
-func isNoAuthPath(path string) bool {
+func isNoAuthPath(path string, metricsWithoutAuth bool) bool {
 	// Local variable instead of module var to prevent accidental mutation
 	noAuthPaths := []string{
 		"/",
@@ -60,6 +100,10 @@ func isNoAuthPath(path string) bool {
 		"/rest/svc/lang", // Required to load language settings on login page
 	}
 
+	if metricsWithoutAuth {
+		noAuthPaths = append(noAuthPaths, "/metrics")
+	}
+
 	// Local variable instead of module var to prevent accidental mutation
 	noAuthPrefixes := []string{
 		// Static assets
@@ -115,7 +159,7 @@ func (m *basicAuthAndSessionMiddleware) ServeHTTP(w http.ResponseWriter, r *http
 	}
 
 	// Exception for static assets and REST calls that don't require authentication.
-	if isNoAuthPath(r.URL.Path) {
+	if isNoAuthPath(r.URL.Path, m.guiCfg.MetricsWithoutAuth) {
 		m.next.ServeHTTP(w, r)
 		return
 	}
@@ -148,7 +192,7 @@ func (m *basicAuthAndSessionMiddleware) passwordAuthHandler(w http.ResponseWrite
 		return
 	}
 
-	emitLoginAttempt(false, req.Username, r.RemoteAddr, m.evLogger)
+	emitLoginAttempt(false, req.Username, r, m.evLogger)
 	antiBruteForceSleep()
 	forbidden(w)
 }
@@ -171,7 +215,7 @@ func attemptBasicAuth(r *http.Request, guiCfg config.GUIConfiguration, ldapCfg c
 		return usernameFromIso, true
 	}
 
-	emitLoginAttempt(false, username, r.RemoteAddr, evLogger)
+	emitLoginAttempt(false, username, r, evLogger)
 	antiBruteForceSleep()
 	return "", false
 }

lib/api/api_csrf.go

@@ -78,7 +78,7 @@ func (m *csrfManager) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if isNoAuthPath(r.URL.Path) {
+	if isNoAuthPath(r.URL.Path, false) {
 		// REST calls that don't require authentication also do not
 		// need a CSRF token.
 		m.next.ServeHTTP(w, r)

lib/api/tokenmanager.go

@@ -117,8 +117,8 @@ func (m *tokenManager) saveLocked() {
 		for token, expiry := range m.tokens.Tokens {
 			tokens = append(tokens, tokenExpiry{token, expiry})
 		}
-		slices.SortFunc(tokens, func(i, j tokenExpiry) int {
-			return int(i.expiry - j.expiry)
+		slices.SortFunc(tokens, func(a, b tokenExpiry) int {
+			return int(a.expiry - b.expiry)
 		})
 		// Remove the oldest tokens.
 		for _, token := range tokens[:len(tokens)-m.maxItems] {
@@ -189,7 +189,7 @@ func (m *tokenCookieManager) createSession(username string, persistent bool, w h
 		Path:   "/",
 	})
 
-	emitLoginAttempt(true, username, r.RemoteAddr, m.evLogger)
+	emitLoginAttempt(true, username, r, m.evLogger)
 }
 
 func (m *tokenCookieManager) hasValidSession(r *http.Request) bool {

lib/build/build.go

@@ -12,7 +12,7 @@ import (
 	"os"
 	"regexp"
 	"runtime"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"time"
@@ -109,7 +109,7 @@ func TagsList() []string {
 		tags = append(tags, Extra)
 	}
 
-	sort.Strings(tags)
+	slices.Sort(tags)
 	return tags
 }
 

lib/config/config.go

@@ -17,7 +17,7 @@ import (
 	"net/url"
 	"os"
 	"reflect"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -68,13 +68,9 @@ var (
 	DefaultTheme = "default"
 	// Default stun servers should be substituted when the configuration
 	// contains <stunServer>default</stunServer>.
-
-	// DefaultPrimaryStunServers are servers provided by us (to avoid causing the public servers burden)
-	DefaultPrimaryStunServers = []string{
-		// Discontinued because of misuse. See https://forum.syncthing.net/t/stun-server-misuse/23319
-		//"stun.syncthing.net:3478",
-	}
-	DefaultSecondaryStunServers = []string{
+	// The primary stun servers are provided by us and are resolved via an SRV record
+	// The fallback stun servers are used if the primary ones can't be resolved or are down.
+	DefaultFallbackStunServers = []string{
 		"stun.counterpath.com:3478",
 		"stun.counterpath.net:3478",
 		"stun.ekiga.net:3478",
@@ -239,6 +235,10 @@ func ReadJSON(r io.Reader, myID protocol.DeviceID) (Configuration, error) {
 func (cfg Configuration) Copy() Configuration {
 	newCfg := cfg
 
+	// Deep copy Defaults
+	newCfg.Defaults.Folder = cfg.Defaults.Folder.Copy()
+	newCfg.Defaults.Device = cfg.Defaults.Device.Copy()
+
 	// Deep copy FolderConfigurations
 	newCfg.Folders = make([]FolderConfiguration, len(cfg.Folders))
 	for i := range newCfg.Folders {
@@ -337,8 +337,8 @@ func (cfg *Configuration) prepareDeviceList() map[protocol.DeviceID]*DeviceConfi
 	// - sorted by ID
 	// Happen before preparting folders as that needs a correct device list.
 	cfg.Devices = ensureNoDuplicateOrEmptyIDDevices(cfg.Devices)
-	sort.Slice(cfg.Devices, func(a, b int) bool {
-		return cfg.Devices[a].DeviceID.Compare(cfg.Devices[b].DeviceID) == -1
+	slices.SortFunc(cfg.Devices, func(a, b DeviceConfiguration) int {
+		return a.DeviceID.Compare(b.DeviceID)
 	})
 
 	// Build a list of available devices
@@ -380,8 +380,8 @@ func (cfg *Configuration) prepareFolders(myID protocol.DeviceID, existingDevices
 		}
 	}
 	// Ensure that the folder list is sorted by ID
-	sort.Slice(cfg.Folders, func(a, b int) bool {
-		return cfg.Folders[a].ID < cfg.Folders[b].ID
+	slices.SortFunc(cfg.Folders, func(a, b FolderConfiguration) int {
+		return strings.Compare(a.ID, b.ID)
 	})
 	return sharedFolders, nil
 }

lib/config/config_test.go

@@ -17,7 +17,7 @@ import (
 	"path/filepath"
 	"reflect"
 	"runtime"
-	"sort"
+	"slices"
 	"strings"
 	"testing"
 
@@ -92,6 +92,8 @@ func TestDefaultValues(t *testing.T) {
 			RawStunServers:            []string{"default"},
 			AnnounceLANAddresses:      true,
 			FeatureFlags:              []string{},
+			AuditEnabled:              false,
+			AuditFile:                 "",
 			ConnectionPriorityTCPLAN:  10,
 			ConnectionPriorityQUICLAN: 20,
 			ConnectionPriorityTCPWAN:  30,
@@ -101,7 +103,7 @@ func TestDefaultValues(t *testing.T) {
 		Defaults: Defaults{
 			Folder: FolderConfiguration{
 				FilesystemType:   FilesystemTypeBasic,
-				Path:             "~",
+				Path:             "",
 				Type:             FolderTypeSendReceive,
 				Devices:          []FolderDeviceConfiguration{{DeviceID: device1}},
 				RescanIntervalS:  3600,
@@ -111,6 +113,7 @@ func TestDefaultValues(t *testing.T) {
 				AutoNormalize:    true,
 				MinDiskFree:      size,
 				Versioning: VersioningConfiguration{
+					FSType:           FilesystemTypeBasic,
 					CleanupIntervalS: 3600,
 					Params:           map[string]string{},
 				},
@@ -180,7 +183,7 @@ func TestDeviceConfig(t *testing.T) {
 				Devices:          []FolderDeviceConfiguration{{DeviceID: device1}, {DeviceID: device4}},
 				Type:             FolderTypeSendOnly,
 				RescanIntervalS:  600,
-				FSWatcherEnabled: false,
+				FSWatcherEnabled: true,
 				FSWatcherDelayS:  10,
 				Copiers:          0,
 				Hashers:          0,
@@ -188,6 +191,8 @@ func TestDeviceConfig(t *testing.T) {
 				MinDiskFree:      Size{1, "%"},
 				MaxConflicts:     -1,
 				Versioning: VersioningConfiguration{
+					CleanupIntervalS: 3600,
+					FSType:           FilesystemTypeBasic,
 					Params:           map[string]string{},
 				},
 				WeakHashThresholdPct: 25,
@@ -195,6 +200,8 @@ func TestDeviceConfig(t *testing.T) {
 				JunctionsAsDirs:      true,
 				MaxConcurrentWrites:  maxConcurrentWritesDefault,
 				XattrFilter: XattrFilter{
+					MaxSingleEntrySize: 1024,
+					MaxTotalSize:       4096,
 					Entries:            []XattrFilterEntry{},
 				},
 			},
@@ -290,6 +297,8 @@ func TestOverriddenValues(t *testing.T) {
 		StunKeepaliveMinS:         900,
 		RawStunServers:            []string{"foo"},
 		FeatureFlags:              []string{"feature"},
+		AuditEnabled:              true,
+		AuditFile:                 "nggyu",
 		ConnectionPriorityTCPLAN:  40,
 		ConnectionPriorityQUICLAN: 45,
 		ConnectionPriorityTCPWAN:  50,
@@ -520,6 +529,7 @@ func TestIssue1750(t *testing.T) {
 
 func TestFolderPath(t *testing.T) {
 	folder := FolderConfiguration{
+		FilesystemType: FilesystemTypeBasic,
 		Path:           "~/tmp",
 	}
 
@@ -901,7 +911,7 @@ func TestV14ListenAddressesMigration(t *testing.T) {
 			t.Error("Configuration was not converted")
 		}
 
-		sort.Strings(tc[2])
+		slices.Sort(tc[2])
 		if !reflect.DeepEqual(cfg.Options.RawListenAddresses, tc[2]) {
 			t.Errorf("Migration error; actual %#v != expected %#v", cfg.Options.RawListenAddresses, tc[2])
 		}

lib/config/deviceconfiguration.go

@@ -8,7 +8,7 @@ package config
 
 import (
 	"fmt"
-	"sort"
+	"slices"
 
 	"github.com/syncthing/syncthing/lib/protocol"
 )
@@ -100,8 +100,8 @@ func sortedObservedFolderSlice(input map[string]ObservedFolder) []ObservedFolder
 	for _, folder := range input {
 		output = append(output, folder)
 	}
-	sort.Slice(output, func(i, j int) bool {
-		return output[i].Time.Before(output[j].Time)
+	slices.SortFunc(output, func(a, b ObservedFolder) int {
+		return a.Time.Compare(b.Time)
 	})
 	return output
 }

lib/config/filesystemtype.go

@@ -8,33 +8,27 @@ package config
 
 import "github.com/syncthing/syncthing/lib/fs"
 
-type FilesystemType int32
+type FilesystemType string
 
 const (
-	FilesystemTypeBasic FilesystemType = 0
-	FilesystemTypeFake  FilesystemType = 1
+	FilesystemTypeBasic FilesystemType = "basic"
+	FilesystemTypeFake  FilesystemType = "fake"
 )
 
-func (t FilesystemType) String() string {
-	switch t {
-	case FilesystemTypeBasic:
-		return "basic"
-	case FilesystemTypeFake:
-		return "fake"
-	default:
-		return "unknown"
+func (t FilesystemType) ToFS() fs.FilesystemType {
+	if t == "" {
+		// legacy compat, zero value means basic
+		return fs.FilesystemTypeBasic
 	}
+	return fs.FilesystemType(string(t))
 }
 
-func (t FilesystemType) ToFS() fs.FilesystemType {
-	switch t {
-	case FilesystemTypeBasic:
-		return fs.FilesystemTypeBasic
-	case FilesystemTypeFake:
-		return fs.FilesystemTypeFake
-	default:
-		return fs.FilesystemTypeBasic
+func (t FilesystemType) String() string {
+	if t == "" {
+		// legacy compat, zero value means basic
+		return string(FilesystemTypeBasic)
 	}
+	return string(t)
 }
 
 func (t FilesystemType) MarshalText() ([]byte, error) {
@@ -42,13 +36,15 @@ func (t FilesystemType) MarshalText() ([]byte, error) {
 }
 
 func (t *FilesystemType) UnmarshalText(bs []byte) error {
-	switch string(bs) {
-	case "basic":
+	if len(bs) == 0 {
+		// legacy compat, zero value means basic
 		*t = FilesystemTypeBasic
-	case "fake":
-		*t = FilesystemTypeFake
-	default:
-		*t = FilesystemTypeBasic
-	}
 		return nil
 	}
+	*t = FilesystemType(string(bs))
+	return nil
+}
+
+func (t *FilesystemType) ParseDefault(str string) error {
+	return t.UnmarshalText([]byte(str))
+}

lib/config/folderconfiguration.go

@@ -9,11 +9,13 @@ package config
 import (
 	"bytes"
 	"crypto/sha256"
+	"encoding/json"
+	"encoding/xml"
 	"errors"
 	"fmt"
 	"path"
 	"path/filepath"
-	"sort"
+	"slices"
 	"strings"
 	"time"
 
@@ -23,6 +25,7 @@ import (
 	"github.com/syncthing/syncthing/lib/db"
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/protocol"
+	"github.com/syncthing/syncthing/lib/structutil"
 )
 
 var (
@@ -47,8 +50,8 @@ type FolderDeviceConfiguration struct {
 type FolderConfiguration struct {
 	ID                      string                      `json:"id" xml:"id,attr" nodefault:"true"`
 	Label                   string                      `json:"label" xml:"label,attr" restart:"false"`
-	FilesystemType          FilesystemType              `json:"filesystemType" xml:"filesystemType"`
-	Path                    string                      `json:"path" xml:"path,attr" default:"~"`
+	FilesystemType          FilesystemType              `json:"filesystemType" xml:"filesystemType" default:"basic"`
+	Path                    string                      `json:"path" xml:"path,attr"`
 	Type                    FolderType                  `json:"type" xml:"type,attr"`
 	Devices                 []FolderDeviceConfiguration `json:"devices" xml:"device"`
 	RescanIntervalS         int                         `json:"rescanIntervalS" xml:"rescanIntervalS,attr" default:"3600"`
@@ -288,8 +291,8 @@ func (f *FolderConfiguration) prepare(myID protocol.DeviceID, existingDevices ma
 	f.Devices = ensureDevicePresent(f.Devices, myID)
 	f.Devices = ensureNoUntrustedTrustingSharing(f, f.Devices, existingDevices)
 
-	sort.Slice(f.Devices, func(a, b int) bool {
-		return f.Devices[a].DeviceID.Compare(f.Devices[b].DeviceID) == -1
+	slices.SortFunc(f.Devices, func(a, b FolderDeviceConfiguration) int {
+		return a.DeviceID.Compare(b.DeviceID)
 	})
 
 	if f.RescanIntervalS > MaxRescanIntervalS {
@@ -399,3 +402,23 @@ func (f XattrFilter) GetMaxSingleEntrySize() int {
 func (f XattrFilter) GetMaxTotalSize() int {
 	return f.MaxTotalSize
 }
+
+func (f *FolderConfiguration) UnmarshalJSON(data []byte) error {
+	structutil.SetDefaults(f)
+
+	// avoid recursing into this method
+	type noCustomUnmarshal FolderConfiguration
+	ptr := (*noCustomUnmarshal)(f)
+
+	return json.Unmarshal(data, ptr)
+}
+
+func (f *FolderConfiguration) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	structutil.SetDefaults(f)
+
+	// avoid recursing into this method
+	type noCustomUnmarshal FolderConfiguration
+	ptr := (*noCustomUnmarshal)(f)
+
+	return d.DecodeElement(ptr, &start)
+}

lib/config/guiconfiguration.go

@@ -25,6 +25,7 @@ type GUIConfiguration struct {
 	User                      string   `json:"user" xml:"user,omitempty"`
 	Password                  string   `json:"password" xml:"password,omitempty"`
 	AuthMode                  AuthMode `json:"authMode" xml:"authMode,omitempty"`
+	MetricsWithoutAuth        bool     `json:"metricsWithoutAuth" xml:"metricsWithoutAuth" default:"false"`
 	RawUseTLS                 bool     `json:"useTLS" xml:"tls,attr"`
 	APIKey                    string   `json:"apiKey" xml:"apikey,omitempty"`
 	InsecureAdminAccess       bool     `json:"insecureAdminAccess" xml:"insecureAdminAccess,omitempty"`

lib/config/metrics.go

@@ -0,0 +1,62 @@
+// Copyright (C) 2025 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package config
+
+import (
+	"strconv"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+// RegisterInfoMetrics registers Prometheus metrics for the given config
+// wrapper.
+func RegisterInfoMetrics(cfg Wrapper) {
+	prometheus.DefaultRegisterer.MustRegister(prometheus.CollectorFunc((&folderInfoMetric{cfg}).Collect))
+	prometheus.DefaultRegisterer.MustRegister(prometheus.CollectorFunc((&folderDeviceMetric{cfg}).Collect))
+}
+
+type folderInfoMetric struct {
+	cfg Wrapper
+}
+
+var folderInfoMetricDesc = prometheus.NewDesc(
+	"syncthing_config_folder_info",
+	"Provides additional information labels on folders",
+	[]string{"folder", "label", "type", "path", "paused"},
+	nil,
+)
+
+func (m *folderInfoMetric) Collect(ch chan<- prometheus.Metric) {
+	for _, folder := range m.cfg.FolderList() {
+		ch <- prometheus.MustNewConstMetric(
+			folderInfoMetricDesc,
+			prometheus.GaugeValue, 1,
+			folder.ID, folder.Label, folder.Type.String(), folder.Path, strconv.FormatBool(folder.Paused),
+		)
+	}
+}
+
+type folderDeviceMetric struct {
+	cfg Wrapper
+}
+
+var folderDeviceMetricDesc = prometheus.NewDesc(
+	"syncthing_config_device_info",
+	"Provides additional information labels on devices",
+	[]string{"device", "name", "introducer", "paused", "untrusted"},
+	nil,
+)
+
+func (m *folderDeviceMetric) Collect(ch chan<- prometheus.Metric) {
+	for _, device := range m.cfg.DeviceList() {
+		ch <- prometheus.MustNewConstMetric(
+			folderDeviceMetricDesc,
+			prometheus.GaugeValue, 1,
+			device.DeviceID.String(), device.Name, strconv.FormatBool(device.Introducer), strconv.FormatBool(device.Paused), strconv.FormatBool(device.Untrusted),
+		)
+	}
+}

lib/config/migrations.go

@@ -7,11 +7,12 @@
 package config
 
 import (
+	"cmp"
 	"net/url"
 	"os"
 	"path"
 	"path/filepath"
-	"sort"
+	"slices"
 	"strings"
 	"sync"
 
@@ -65,8 +66,8 @@ type migrationSet []migration
 func (ms migrationSet) apply(cfg *Configuration) {
 	// Make sure we apply the migrations in target version order regardless
 	// of how it was defined.
-	sort.Slice(ms, func(a, b int) bool {
-		return ms[a].targetVersion < ms[b].targetVersion
+	slices.SortFunc(ms, func(a, b migration) int {
+		return cmp.Compare(a.targetVersion, b.targetVersion)
 	})
 
 	// Apply all migrations.
@@ -349,7 +350,7 @@ func migrateToConfigV14(cfg *Configuration) {
 	cfg.Options.DeprecatedRelayServers = nil
 
 	// For consistency
-	sort.Strings(cfg.Options.RawListenAddresses)
+	slices.Sort(cfg.Options.RawListenAddresses)
 
 	var newAddrs []string
 	for _, addr := range cfg.Options.RawGlobalAnnServers {

lib/config/optionsconfiguration.go

@@ -8,8 +8,10 @@ package config
 
 import (
 	"fmt"
+	"net"
 	"runtime"
 	"slices"
+	"strings"
 
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"
@@ -66,6 +68,8 @@ type OptionsConfiguration struct {
 	AnnounceLANAddresses        bool     `json:"announceLANAddresses" xml:"announceLANAddresses" default:"true"`
 	SendFullIndexOnUpgrade      bool     `json:"sendFullIndexOnUpgrade" xml:"sendFullIndexOnUpgrade"`
 	FeatureFlags                []string `json:"featureFlags" xml:"featureFlag"`
+	AuditEnabled                bool     `json:"auditEnabled" xml:"auditEnabled" default:"false" restart:"true"`
+	AuditFile                   string   `json:"auditFile" xml:"auditFile" restart:"true"`
 	// The number of connections at which we stop trying to connect to more
 	// devices, zero meaning no limit. Does not affect incoming connections.
 	ConnectionLimitEnough int `json:"connectionLimitEnough" xml:"connectionLimitEnough"`
@@ -73,9 +77,6 @@ type OptionsConfiguration struct {
 	// meaning no limit. Affects incoming connections and prevents
 	// attempting outgoing connections.
 	ConnectionLimitMax                 int `json:"connectionLimitMax" xml:"connectionLimitMax"`
-	// When set, this allows TLS 1.2 on sync connections, where we otherwise
-	// default to TLS 1.3+ only.
-	InsecureAllowOldTLSVersions        bool `json:"insecureAllowOldTLSVersions" xml:"insecureAllowOldTLSVersions"`
 	ConnectionPriorityTCPLAN           int `json:"connectionPriorityTcpLan" xml:"connectionPriorityTcpLan" default:"10"`
 	ConnectionPriorityQUICLAN          int `json:"connectionPriorityQuicLan" xml:"connectionPriorityQuicLan" default:"20"`
 	ConnectionPriorityTCPWAN           int `json:"connectionPriorityTcpWan" xml:"connectionPriorityTcpWan" default:"30"`
@@ -184,15 +185,22 @@ func (opts OptionsConfiguration) StunServers() []string {
 	for _, addr := range opts.RawStunServers {
 		switch addr {
 		case "default":
-			defaultPrimaryAddresses := make([]string, len(DefaultPrimaryStunServers))
-			copy(defaultPrimaryAddresses, DefaultPrimaryStunServers)
-			rand.Shuffle(defaultPrimaryAddresses)
-			addresses = append(addresses, defaultPrimaryAddresses...)
+			_, records, err := net.LookupSRV("stun", "udp", "syncthing.net")
+			if err != nil {
+				l.Debugf("Unable to resolve primary STUN servers via DNS:", err)
+			}
 
-			defaultSecondaryAddresses := make([]string, len(DefaultSecondaryStunServers))
-			copy(defaultSecondaryAddresses, DefaultSecondaryStunServers)
-			rand.Shuffle(defaultSecondaryAddresses)
-			addresses = append(addresses, defaultSecondaryAddresses...)
+			for _, record := range records {
+				priority := record.Priority
+				target := strings.TrimSuffix(record.Target, ".")
+				address := fmt.Sprintf("%s:%d", target, record.Port)
+				l.Debugf("Resolved primary STUN server %s with priority %d", address, priority)
+				addresses = append(addresses, address)
+			}
+
+			fallbackAddresses := slices.Clone(DefaultFallbackStunServers)
+			rand.Shuffle(fallbackAddresses)
+			addresses = append(addresses, fallbackAddresses...)
 		default:
 			addresses = append(addresses, addr)
 		}

lib/config/testdata/overridenvalues.xml

@@ -45,6 +45,8 @@
         <unackedNotificationID>asdfasdf</unackedNotificationID>
         <announceLANAddresses>false</announceLANAddresses>
         <featureFlag>feature</featureFlag>
+        <auditEnabled>true</auditEnabled>
+        <auditFile>nggyu</auditFile>
         <connectionPriorityTcpLan>40</connectionPriorityTcpLan>
         <connectionPriorityQuicLan>45</connectionPriorityQuicLan>
         <connectionPriorityTcpWan>50</connectionPriorityTcpWan>

lib/config/versioningconfiguration.go

@@ -9,7 +9,8 @@ package config
 import (
 	"encoding/json"
 	"encoding/xml"
-	"sort"
+	"slices"
+	"strings"
 
 	"github.com/syncthing/syncthing/lib/structutil"
 )
@@ -20,7 +21,7 @@ type VersioningConfiguration struct {
 	Params           map[string]string `json:"params" xml:"parameter" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 	CleanupIntervalS int               `json:"cleanupIntervalS" xml:"cleanupIntervalS" default:"3600"`
 	FSPath           string            `json:"fsPath" xml:"fsPath"`
-	FSType           FilesystemType    `json:"fsType" xml:"fsType"`
+	FSType           FilesystemType    `json:"fsType" xml:"fsType" default:"basic"`
 }
 
 func (c *VersioningConfiguration) Reset() {
@@ -33,7 +34,7 @@ type internalVersioningConfiguration struct {
 	Params           []internalParam `xml:"param"`
 	CleanupIntervalS int             `xml:"cleanupIntervalS" default:"3600"`
 	FSPath           string          `xml:"fsPath"`
-	FSType           FilesystemType  `xml:"fsType"`
+	FSType           FilesystemType  `xml:"fsType" default:"basic"`
 }
 
 type internalParam struct {
@@ -84,8 +85,8 @@ func (c *VersioningConfiguration) toInternal() internalVersioningConfiguration {
 	for k, v := range c.Params {
 		tmp.Params = append(tmp.Params, internalParam{k, v})
 	}
-	sort.Slice(tmp.Params, func(a, b int) bool {
-		return tmp.Params[a].Key < tmp.Params[b].Key
+	slices.SortFunc(tmp.Params, func(a, b internalParam) int {
+		return strings.Compare(a.Key, b.Key)
 	})
 	return tmp
 }

lib/connections/service.go

@@ -23,7 +23,6 @@ import (
 	"net"
 	"net/url"
 	"slices"
-	"sort"
 	"strings"
 	stdsync "sync"
 	"time"
@@ -445,7 +444,7 @@ func (s *service) handleHellos(ctx context.Context) error {
 		// connections are limited.
 		rd, wr := s.limiter.getLimiters(remoteID, c, c.IsLocal())
 
-		protoConn := protocol.NewConnection(remoteID, rd, wr, c, s.model, c, deviceCfg.Compression.ToProtocol(), s.cfg.FolderPasswords(remoteID), s.keyGen)
+		protoConn := protocol.NewConnection(remoteID, rd, wr, c, s.model, c, deviceCfg.Compression.ToProtocol(), s.keyGen)
 		s.accountAddedConnection(protoConn, hello, s.cfg.Options().ConnectionPriorityUpgradeThreshold)
 		go func() {
 			<-protoConn.Closed()
@@ -1151,7 +1150,7 @@ func (s *service) dialParallel(ctx context.Context, deviceID protocol.DeviceID,
 	}
 
 	// Sort the priorities so that we dial lowest first (which means highest...)
-	sort.Ints(priorities)
+	slices.Sort(priorities)
 
 	sema := semaphore.MultiSemaphore{semaphore.New(dialMaxParallelPerDevice), parentSema}
 	for _, prio := range priorities {

lib/db/meta_test.go

@@ -8,7 +8,7 @@ package db
 
 import (
 	"math/bits"
-	"sort"
+	"slices"
 	"testing"
 
 	"github.com/syncthing/syncthing/lib/events"
@@ -71,8 +71,8 @@ func TestMetaDevices(t *testing.T) {
 	}
 
 	// Check that we got the two devices we expect
-	sort.Slice(devs, func(a, b int) bool {
-		return devs[a].Compare(devs[b]) == -1
+	slices.SortFunc(devs, func(a, b protocol.DeviceID) int {
+		return a.Compare(b)
 	})
 	if devs[0] != d1 {
 		t.Error("first device should be d1")

lib/db/set_test.go

@@ -11,7 +11,8 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
-	"sort"
+	"slices"
+	"strings"
 	"testing"
 	"time"
 
@@ -102,16 +103,8 @@ func needList(t testing.TB, s *db.FileSet, n protocol.DeviceID) []protocol.FileI
 
 type fileList []protocol.FileInfo
 
-func (l fileList) Len() int {
-	return len(l)
-}
-
-func (l fileList) Less(a, b int) bool {
-	return l[a].Name < l[b].Name
-}
-
-func (l fileList) Swap(a, b int) {
-	l[a], l[b] = l[b], l[a]
+func compareByName(a, b protocol.FileInfo) int {
+	return strings.Compare(a.Name, b.Name)
 }
 
 func (l fileList) String() string {
@@ -218,7 +211,7 @@ func TestGlobalSet(t *testing.T) {
 		t.Helper()
 
 		g := fileList(globalList(t, m))
-		sort.Sort(g)
+		slices.SortFunc(g, compareByName)
 
 		if fmt.Sprint(g) != fmt.Sprint(expectedGlobal) {
 			t.Errorf("Global incorrect;\n A: %v !=\n E: %v", g, expectedGlobal)
@@ -255,7 +248,7 @@ func TestGlobalSet(t *testing.T) {
 		}
 
 		h := fileList(haveList(t, m, protocol.LocalDeviceID))
-		sort.Sort(h)
+		slices.SortFunc(h, compareByName)
 
 		if fmt.Sprint(h) != fmt.Sprint(localTot) {
 			t.Errorf("Have incorrect (local);\n A: %v !=\n E: %v", h, localTot)
@@ -292,14 +285,14 @@ func TestGlobalSet(t *testing.T) {
 		}
 
 		h = fileList(haveList(t, m, remoteDevice0))
-		sort.Sort(h)
+		slices.SortFunc(h, compareByName)
 
 		if fmt.Sprint(h) != fmt.Sprint(remoteTot) {
 			t.Errorf("Have incorrect (remote);\n A: %v !=\n E: %v", h, remoteTot)
 		}
 
 		n := fileList(needList(t, m, protocol.LocalDeviceID))
-		sort.Sort(n)
+		slices.SortFunc(n, compareByName)
 
 		if fmt.Sprint(n) != fmt.Sprint(expectedLocalNeed) {
 			t.Errorf("Need incorrect (local);\n A: %v !=\n E: %v", n, expectedLocalNeed)
@@ -308,7 +301,7 @@ func TestGlobalSet(t *testing.T) {
 		checkNeed(t, m, protocol.LocalDeviceID, expectedLocalNeed)
 
 		n = fileList(needList(t, m, remoteDevice0))
-		sort.Sort(n)
+		slices.SortFunc(n, compareByName)
 
 		if fmt.Sprint(n) != fmt.Sprint(expectedRemoteNeed) {
 			t.Errorf("Need incorrect (remote);\n A: %v !=\n E: %v", n, expectedRemoteNeed)
@@ -428,14 +421,14 @@ func TestGlobalSet(t *testing.T) {
 	check()
 
 	h := fileList(haveList(t, m, remoteDevice1))
-	sort.Sort(h)
+	slices.SortFunc(h, compareByName)
 
 	if fmt.Sprint(h) != fmt.Sprint(secRemote) {
 		t.Errorf("Have incorrect (secRemote);\n A: %v !=\n E: %v", h, secRemote)
 	}
 
 	n := fileList(needList(t, m, remoteDevice1))
-	sort.Sort(n)
+	slices.SortFunc(n, compareByName)
 
 	if fmt.Sprint(n) != fmt.Sprint(expectedSecRemoteNeed) {
 		t.Errorf("Need incorrect (secRemote);\n A: %v !=\n E: %v", n, expectedSecRemoteNeed)
@@ -475,7 +468,7 @@ func TestNeedWithInvalid(t *testing.T) {
 	replace(s, remoteDevice1, remote1Have)
 
 	need := fileList(needList(t, s, protocol.LocalDeviceID))
-	sort.Sort(need)
+	slices.SortFunc(need, compareByName)
 
 	if fmt.Sprint(need) != fmt.Sprint(expectedNeed) {
 		t.Errorf("Need incorrect;\n A: %v !=\n E: %v", need, expectedNeed)
@@ -503,7 +496,7 @@ func TestUpdateToInvalid(t *testing.T) {
 	replace(s, protocol.LocalDeviceID, localHave)
 
 	have := fileList(haveList(t, s, protocol.LocalDeviceID))
-	sort.Sort(have)
+	slices.SortFunc(have, compareByName)
 
 	if fmt.Sprint(have) != fmt.Sprint(localHave) {
 		t.Errorf("Have incorrect before invalidation;\n A: %v !=\n E: %v", have, localHave)
@@ -519,8 +512,8 @@ func TestUpdateToInvalid(t *testing.T) {
 
 	s.Update(protocol.LocalDeviceID, append(fileList{}, localHave[1], localHave[4]))
 
-	have = fileList(haveList(t, s, protocol.LocalDeviceID))
-	sort.Sort(have)
+	have = haveList(t, s, protocol.LocalDeviceID)
+	slices.SortFunc(have, compareByName)
 
 	if fmt.Sprint(have) != fmt.Sprint(localHave) {
 		t.Errorf("Have incorrect after invalidation;\n A: %v !=\n E: %v", have, localHave)
@@ -605,7 +598,7 @@ func TestGlobalReset(t *testing.T) {
 
 	replace(m, protocol.LocalDeviceID, local)
 	g := globalList(t, m)
-	sort.Sort(fileList(g))
+	slices.SortFunc(g, compareByName)
 
 	if diff, equal := messagediff.PrettyDiff(local, g); !equal {
 		t.Errorf("Global incorrect;\nglobal: %v\n!=\nlocal: %v\ndiff:\n%s", g, local, diff)
@@ -615,7 +608,7 @@ func TestGlobalReset(t *testing.T) {
 	replace(m, remoteDevice0, nil)
 
 	g = globalList(t, m)
-	sort.Sort(fileList(g))
+	slices.SortFunc(g, compareByName)
 
 	if diff, equal := messagediff.PrettyDiff(local, g); !equal {
 		t.Errorf("Global incorrect;\nglobal: %v\n!=\nlocal: %v\ndiff:\n%s", g, local, diff)
@@ -653,8 +646,8 @@ func TestNeed(t *testing.T) {
 
 	need := needList(t, m, protocol.LocalDeviceID)
 
-	sort.Sort(fileList(need))
-	sort.Sort(fileList(shouldNeed))
+	slices.SortFunc(need, compareByName)
+	slices.SortFunc(shouldNeed, compareByName)
 
 	if fmt.Sprint(need) != fmt.Sprint(shouldNeed) {
 		t.Errorf("Need incorrect;\n%v !=\n%v", need, shouldNeed)

lib/db/smallindex.go

@@ -8,7 +8,7 @@ package db
 
 import (
 	"encoding/binary"
-	"sort"
+	"slices"
 
 	"github.com/syncthing/syncthing/lib/db/backend"
 	"github.com/syncthing/syncthing/lib/sync"
@@ -147,6 +147,6 @@ func (i *smallIndex) Values() []string {
 	}
 	i.mut.Unlock()
 
-	sort.Strings(vals)
+	slices.Sort(vals)
 	return vals
 }

lib/discover/manager.go

@@ -13,7 +13,7 @@ import (
 	"context"
 	"crypto/tls"
 	"fmt"
-	"sort"
+	"slices"
 	"time"
 
 	"github.com/thejerf/suture/v4"
@@ -159,7 +159,7 @@ func (m *manager) Lookup(ctx context.Context, deviceID protocol.DeviceID) (addre
 	m.mut.RUnlock()
 
 	addresses = stringutil.UniqueTrimmedStrings(addresses)
-	sort.Strings(addresses)
+	slices.Sort(addresses)
 
 	l.Debugln("lookup results for", deviceID)
 	l.Debugln("  addresses: ", addresses)

lib/fs/basicfs.go

@@ -19,6 +19,8 @@ import (
 	"github.com/syncthing/syncthing/lib/build"
 )
 
+const FilesystemTypeBasic FilesystemType = "basic"
+
 var (
 	errInvalidFilenameEmpty               = errors.New("name is invalid, must not be empty")
 	errInvalidFilenameWindowsSpacePeriod  = errors.New("name is invalid, must not end in space or period on Windows")
@@ -56,6 +58,12 @@ type (
 	groupCache = valueCache[string, *user.Group]
 )
 
+func init() {
+	RegisterFilesystemType(FilesystemTypeBasic, func(root string, opts ...Option) (Filesystem, error) {
+		return newBasicFilesystem(root, opts...), nil
+	})
+}
+
 func newBasicFilesystem(root string, opts ...Option) *BasicFilesystem {
 	if root == "" {
 		root = "." // Otherwise "" becomes "/" below
@@ -328,10 +336,6 @@ func (*BasicFilesystem) underlying() (Filesystem, bool) {
 	return nil, false
 }
 
-func (*BasicFilesystem) wrapperType() filesystemWrapperType {
-	return filesystemWrapperTypeNone
-}
-
 // basicFile implements the fs.File interface on top of an os.File
 type basicFile struct {
 	*os.File

lib/fs/basicfs_test.go

@@ -12,7 +12,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"syscall"
@@ -218,7 +218,7 @@ func TestDirNames(t *testing.T) {
 		"a",
 		"bC",
 	}
-	sort.Strings(testCases)
+	slices.Sort(testCases)
 
 	for _, sub := range testCases {
 		if err := os.Mkdir(filepath.Join(dir, sub), 0o777); err != nil {
@@ -229,7 +229,7 @@ func TestDirNames(t *testing.T) {
 	if dirs, err := fs.DirNames("."); err != nil || len(dirs) != len(testCases) {
 		t.Errorf("%s %s %s", err, dirs, testCases)
 	} else {
-		sort.Strings(dirs)
+		slices.Sort(dirs)
 		for i := range dirs {
 			if dirs[i] != testCases[i] {
 				t.Errorf("%s != %s", dirs[i], testCases[i])
@@ -321,8 +321,8 @@ func TestGlob(t *testing.T) {
 
 	for _, testCase := range testCases {
 		results, err := fs.Glob(testCase.pattern)
-		sort.Strings(results)
-		sort.Strings(testCase.matches)
+		slices.Sort(results)
+		slices.Sort(testCase.matches)
 		if err != nil {
 			t.Error(err)
 		}
@@ -628,8 +628,7 @@ func TestXattr(t *testing.T) {
 			Value: value,
 		})
 	}
-	sort.Slice(attrs, func(i, j int) bool { return attrs[i].Name < attrs[j].Name })
-
+	slices.SortFunc(attrs, func(a, b protocol.Xattr) int { return strings.Compare(a.Name, b.Name) })
 	// Set the xattrs, read them back and compare
 	if err := tfs.SetXattr("/test", attrs, testXattrFilter{}); err != nil {
 		t.Fatal(err)

lib/fs/basicfs_xattr_bsdish.go

@@ -12,7 +12,7 @@ package fs
 import (
 	"errors"
 	"fmt"
-	"sort"
+	"slices"
 	"unsafe"
 
 	"golang.org/x/sys/unix"
@@ -69,7 +69,7 @@ func listXattr(path string) ([]string, error) {
 		}
 	}
 
-	sort.Strings(attrs)
+	slices.Sort(attrs)
 	return attrs, nil
 }
 

lib/fs/basicfs_xattr_linuxish.go

@@ -12,7 +12,7 @@ package fs
 import (
 	"errors"
 	"fmt"
-	"sort"
+	"slices"
 	"strings"
 
 	"golang.org/x/sys/unix"
@@ -38,6 +38,6 @@ func listXattr(path string) ([]string, error) {
 	buf = buf[:size]
 	attrs := compact(strings.Split(string(buf), "\x00"))
 
-	sort.Strings(attrs)
+	slices.Sort(attrs)
 	return attrs, nil
 }

lib/fs/casefs.go

@@ -357,10 +357,6 @@ func (f *caseFilesystem) underlying() (Filesystem, bool) {
 	return f.Filesystem, true
 }
 
-func (*caseFilesystem) wrapperType() filesystemWrapperType {
-	return filesystemWrapperTypeCase
-}
-
 func (f *caseFilesystem) checkCase(name string) error {
 	var err error
 	if name, err = Canonicalize(name); err != nil {

lib/fs/casefs_test.go

@@ -11,7 +11,7 @@ import (
 	"fmt"
 	"path/filepath"
 	"runtime"
-	"sort"
+	"slices"
 	"strings"
 	"testing"
 	"time"
@@ -161,10 +161,11 @@ func BenchmarkWalkCaseFakeFS100k(b *testing.B) {
 		b.Fatal(err)
 	}
 	b.Run("rawfs", func(b *testing.B) {
-		var fakefs *fakeFS
-		if ffs, ok := unwrapFilesystem(fsys, filesystemWrapperTypeNone); ok {
-			fakefs = ffs.(*fakeFS)
+		fakefs, ok := unwrapFilesystem[*fakeFS](fsys)
+		if !ok {
+			panic("expected unwrap to fakefs")
 		}
+
 		fakefs.resetCounters()
 		benchmarkWalkFakeFS(b, fsys, paths, 0, "")
 		fakefs.reportMetricsPerOp(b)
@@ -180,9 +181,10 @@ func BenchmarkWalkCaseFakeFS100k(b *testing.B) {
 				cache: newCaseCache(),
 			},
 		}
-		var fakefs *fakeFS
-		if ffs, ok := unwrapFilesystem(fsys, filesystemWrapperTypeNone); ok {
-			fakefs = ffs.(*fakeFS)
+
+		fakefs, ok := unwrapFilesystem[*fakeFS](fsys)
+		if !ok {
+			panic("expected unwrap to fakefs")
 		}
 		fakefs.resetCounters()
 		benchmarkWalkFakeFS(b, casefs, paths, 0, "")
@@ -209,10 +211,12 @@ func BenchmarkWalkCaseFakeFS100k(b *testing.B) {
 				cache: newCaseCache(),
 			},
 		}
-		var fakefs *fakeFS
-		if ffs, ok := unwrapFilesystem(fsys, filesystemWrapperTypeNone); ok {
-			fakefs = ffs.(*fakeFS)
+
+		fakefs, ok := unwrapFilesystem[*fakeFS](fsys)
+		if !ok {
+			panic("expected unwrap to fakefs")
 		}
+
 		fakefs.resetCounters()
 		benchmarkWalkFakeFS(b, casefs, paths, otherOpEvery, otherOpPath)
 		fakefs.reportMetricsPerOp(b)
@@ -340,7 +344,7 @@ func fakefsForBenchmark(nfiles int, latency time.Duration) (Filesystem, []string
 		return nil, nil, errors.New("didn't find enough stuff")
 	}
 
-	sort.Strings(paths)
+	slices.Sort(paths)
 
 	return fsys, paths, nil
 }

lib/fs/errorfs.go

@@ -69,7 +69,3 @@ func (fs *errorFilesystem) PlatformData(_ string, _, _ bool, _ XattrFilter) (pro
 func (*errorFilesystem) underlying() (Filesystem, bool) {
 	return nil, false
 }
-
-func (*errorFilesystem) wrapperType() filesystemWrapperType {
-	return filesystemWrapperTypeError
-}

lib/fs/fakefs.go

@@ -26,6 +26,14 @@ import (
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
+const FilesystemTypeFake FilesystemType = "fake"
+
+func init() {
+	RegisterFilesystemType(FilesystemTypeFake, func(root string, opts ...Option) (Filesystem, error) {
+		return newFakeFilesystem(root, opts...), nil
+	})
+}
+
 // see readShortAt()
 const randomBlockShift = 14 // 128k
 
@@ -716,10 +724,6 @@ func (*fakeFS) underlying() (Filesystem, bool) {
 	return nil, false
 }
 
-func (*fakeFS) wrapperType() filesystemWrapperType {
-	return filesystemWrapperTypeNone
-}
-
 func (fs *fakeFS) resetCounters() {
 	fs.mut.Lock()
 	fs.counters = fakeFSCounters{}

lib/fs/fakefs_test.go

@@ -14,7 +14,7 @@ import (
 	"path"
 	"path/filepath"
 	"runtime"
-	"sort"
+	"slices"
 	"testing"
 	"time"
 
@@ -369,8 +369,8 @@ func assertDir(t *testing.T, fs Filesystem, directory string, filenames []string
 	if path.Clean(directory) == "/" {
 		filenames = append(filenames, ".stfolder")
 	}
-	sort.Strings(filenames)
-	sort.Strings(got)
+	slices.Sort(filenames)
+	slices.Sort(got)
 
 	if len(filenames) != len(got) {
 		t.Errorf("want %s, got %s", filenames, got)

lib/fs/filesystem.go

@@ -9,6 +9,7 @@ package fs
 import (
 	"context"
 	"errors"
+	"fmt"
 	"io"
 	"io/fs"
 	"os"
@@ -20,18 +21,6 @@ import (
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
-type filesystemWrapperType int32
-
-const (
-	filesystemWrapperTypeNone filesystemWrapperType = iota
-	filesystemWrapperTypeMtime
-	filesystemWrapperTypeCase
-	filesystemWrapperTypeError
-	filesystemWrapperTypeWalk
-	filesystemWrapperTypeLog
-	filesystemWrapperTypeMetrics
-)
-
 type XattrFilter interface {
 	Permit(string) bool
 	GetMaxSingleEntrySize() int
@@ -74,10 +63,11 @@ type Filesystem interface {
 	PlatformData(name string, withOwnership, withXattrs bool, xattrFilter XattrFilter) (protocol.PlatformData, error)
 	GetXattr(name string, xattrFilter XattrFilter) ([]protocol.Xattr, error)
 	SetXattr(path string, xattrs []protocol.Xattr, xattrFilter XattrFilter) error
+}
 
+type wrappingFilesystem interface {
 	// Used for unwrapping things
 	underlying() (Filesystem, bool)
-	wrapperType() filesystemWrapperType
 }
 
 // The File interface abstracts access to a regular file, being a somewhat
@@ -215,17 +205,6 @@ func IsPermission(err error) bool {
 // IsPathSeparator is the equivalent of os.IsPathSeparator
 var IsPathSeparator = os.IsPathSeparator
 
-// Option modifies a filesystem at creation. An option might be specific
-// to a filesystem-type.
-//
-// String is used to detect options with the same effect, i.e. must be different
-// for options with different effects. Meaning if an option has parameters, a
-// representation of those must be part of the returned string.
-type Option interface {
-	String() string
-	apply(Filesystem) Filesystem
-}
-
 func NewFilesystem(fsType FilesystemType, uri string, opts ...Option) Filesystem {
 	var caseOpt Option
 	var mtimeOpt Option
@@ -246,18 +225,23 @@ func NewFilesystem(fsType FilesystemType, uri string, opts ...Option) Filesystem
 	}
 	opts = opts[:i]
 
+	// Construct file system using the registered factory function
 	var fs Filesystem
-	switch fsType {
-	case FilesystemTypeBasic:
-		fs = newBasicFilesystem(uri, opts...)
-	case FilesystemTypeFake:
-		fs = newFakeFilesystem(uri, opts...)
-	default:
-		l.Debugln("Unknown filesystem", fsType, uri)
+	var err error
+	filesystemFactoriesMutex.Lock()
+	fsFactory, factoryFound := filesystemFactories[fsType]
+	filesystemFactoriesMutex.Unlock()
+	if factoryFound {
+		fs, err = fsFactory(uri, opts...)
+	} else {
+		err = fmt.Errorf("File system type '%s' not recognized", fsType)
+	}
+
+	if err != nil {
 		fs = &errorFilesystem{
 			fsType: fsType,
 			uri:    uri,
-			err:    errors.New("filesystem with type " + fsType.String() + " does not exist."),
+			err:    err,
 		}
 	}
 
@@ -358,16 +342,23 @@ func Canonicalize(file string) (string, error) {
 	return file, nil
 }
 
-// unwrapFilesystem removes "wrapping" filesystems to expose the filesystem of the requested wrapperType, if it exists.
-func unwrapFilesystem(fs Filesystem, wrapperType filesystemWrapperType) (Filesystem, bool) {
-	var ok bool
+// unwrapFilesystem removes "wrapping" filesystems to expose the filesystem of the requested wrapper type T, if it exists.
+func unwrapFilesystem[T Filesystem](fs Filesystem) (T, bool) {
 	for {
-		if fs.wrapperType() == wrapperType {
-			return fs, true
+		if unwrapped, ok := fs.(T); ok {
+			return unwrapped, true
 		}
-		fs, ok = fs.underlying()
+
+		wrappingFs, ok := fs.(wrappingFilesystem)
 		if !ok {
-			return nil, false
+			var x T
+			return x, false
+		}
+
+		fs, ok = wrappingFs.underlying()
+		if !ok {
+			var x T
+			return x, false
 		}
 	}
 }

lib/fs/logfs.go

@@ -177,7 +177,3 @@ func (fs *logFilesystem) Usage(name string) (Usage, error) {
 func (fs *logFilesystem) underlying() (Filesystem, bool) {
 	return fs.Filesystem, true
 }
-
-func (*logFilesystem) wrapperType() filesystemWrapperType {
-	return filesystemWrapperTypeLog
-}

lib/fs/metrics.go

@@ -273,10 +273,6 @@ func (m *metricsFS) underlying() (Filesystem, bool) {
 	return m.next, true
 }
 
-func (m *metricsFS) wrapperType() filesystemWrapperType {
-	return filesystemWrapperTypeMetrics
-}
-
 type metricsFile struct {
 	fs   *metricsFS
 	next File

lib/fs/mtimefs.go

@@ -146,10 +146,6 @@ func (f *mtimeFS) underlying() (Filesystem, bool) {
 	return f.Filesystem, true
 }
 
-func (*mtimeFS) wrapperType() filesystemWrapperType {
-	return filesystemWrapperTypeMtime
-}
-
 func (f *mtimeFS) save(name string, real, virtual time.Time) {
 	if f.caseInsensitive {
 		name = UnicodeLowercaseNormalized(name)
@@ -255,13 +251,9 @@ func (t *MtimeMapping) Unmarshal(bs []byte) error {
 }
 
 func GetMtimeMapping(fs Filesystem, file string) (MtimeMapping, error) {
-	fs, ok := unwrapFilesystem(fs, filesystemWrapperTypeMtime)
+	mtimeFs, ok := unwrapFilesystem[*mtimeFS](fs)
 	if !ok {
 		return MtimeMapping{}, errors.New("failed to unwrap")
 	}
-	mtimeFs, ok := fs.(*mtimeFS)
-	if !ok {
-		return MtimeMapping{}, errors.New("unwrapping failed")
-	}
 	return mtimeFs.load(file)
 }

lib/fs/mtimefs_test.go

@@ -261,7 +261,7 @@ func newMtimeFS(path string, db database, options ...MtimeFSOption) *mtimeFS {
 
 func newMtimeFSWithWalk(path string, db database, options ...MtimeFSOption) (*mtimeFS, *walkFilesystem) {
 	fs := NewFilesystem(FilesystemTypeBasic, path, NewMtimeOption(db, options...))
-	wfs, _ := unwrapFilesystem(fs, filesystemWrapperTypeWalk)
-	mfs, _ := unwrapFilesystem(fs, filesystemWrapperTypeMtime)
-	return mfs.(*mtimeFS), wfs.(*walkFilesystem)
+	wfs, _ := unwrapFilesystem[*walkFilesystem](fs)
+	mfs, _ := unwrapFilesystem[*mtimeFS](fs)
+	return mfs, wfs
 }

lib/fs/types.go

@@ -6,20 +6,34 @@
 
 package fs
 
-type FilesystemType int32
+import "sync"
 
-const (
-	FilesystemTypeBasic FilesystemType = 0
-	FilesystemTypeFake  FilesystemType = 1
-)
+type FilesystemType string
 
-func (t FilesystemType) String() string {
-	switch t {
-	case FilesystemTypeBasic:
-		return "basic"
-	case FilesystemTypeFake:
-		return "fake"
-	default:
-		return "unknown"
+// Option modifies a filesystem at creation. An option might be specific
+// to a filesystem-type.
+//
+// String is used to detect options with the same effect, i.e. must be different
+// for options with different effects. Meaning if an option has parameters, a
+// representation of those must be part of the returned string.
+type Option interface {
+	String() string
+	apply(Filesystem) Filesystem
 }
+
+// Factory function type for constructing a custom file system. It takes the URI
+// and options as its parameters.
+type FilesystemFactory func(string, ...Option) (Filesystem, error)
+
+// For each registered file system type, a function to construct a file system.
+var filesystemFactories map[FilesystemType]FilesystemFactory = make(map[FilesystemType]FilesystemFactory)
+var filesystemFactoriesMutex sync.Mutex = sync.Mutex{}
+
+// Register a function to be called when a filesystem is to be constructed with
+// the specified fsType. The function will receive the URI for the file system as well
+// as all options.
+func RegisterFilesystemType(fsType FilesystemType, fn FilesystemFactory) {
+	filesystemFactoriesMutex.Lock()
+	defer filesystemFactoriesMutex.Unlock()
+	filesystemFactories[fsType] = fn
 }

lib/fs/walkfs.go

@@ -153,7 +153,3 @@ func (f *walkFilesystem) Walk(root string, walkFn WalkFunc) error {
 func (f *walkFilesystem) underlying() (Filesystem, bool) {
 	return f.Filesystem, true
 }
-
-func (*walkFilesystem) wrapperType() filesystemWrapperType {
-	return filesystemWrapperTypeWalk
-}

lib/locations/locations.go

@@ -33,6 +33,7 @@ const (
 	AuditLog      LocationEnum = "auditLog"
 	GUIAssets     LocationEnum = "guiAssets"
 	DefFolder     LocationEnum = "defFolder"
+	LockFile      LocationEnum = "lockFile"
 )
 
 type BaseDirEnum string
@@ -124,6 +125,7 @@ var locationTemplates = map[LocationEnum]string{
 	AuditLog:      "${data}/audit-%{timestamp}.log",
 	GUIAssets:     "${config}/gui",
 	DefFolder:     "${userHome}/Sync",
+	LockFile:      "${data}/syncthing.lock",
 }
 
 var locations = make(map[LocationEnum]string)

lib/model/blockpullreorderer.go

@@ -7,7 +7,7 @@
 package model
 
 import (
-	"sort"
+	"slices"
 
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/protocol"
@@ -52,8 +52,8 @@ type standardBlockPullReorderer struct {
 
 func newStandardBlockPullReorderer(id protocol.DeviceID, otherDevices []protocol.DeviceID) *standardBlockPullReorderer {
 	allDevices := append(otherDevices, id)
-	sort.Slice(allDevices, func(i, j int) bool {
-		return allDevices[i].Compare(allDevices[j]) == -1
+	slices.SortFunc(allDevices, func(a, b protocol.DeviceID) int {
+		return a.Compare(b)
 	})
 	// Find our index
 	myIndex := -1

lib/model/blockpullreorderer_test.go

@@ -8,7 +8,7 @@ package model
 
 import (
 	"reflect"
-	"sort"
+	"slices"
 	"testing"
 
 	"github.com/syncthing/syncthing/lib/protocol"
@@ -65,8 +65,8 @@ func Test_inOrderBlockPullReorderer_Reorder(t *testing.T) {
 func Test_standardBlockPullReorderer_Reorder(t *testing.T) {
 	// Order the devices, so we know their ordering ahead of time.
 	devices := []protocol.DeviceID{myID, device1, device2}
-	sort.Slice(devices, func(i, j int) bool {
-		return devices[i].Compare(devices[j]) == -1
+	slices.SortFunc(devices, func(a, b protocol.DeviceID) int {
+		return a.Compare(b)
 	})
 
 	blocks := func(i ...int) []protocol.BlockInfo {

lib/model/folder.go

@@ -12,7 +12,8 @@ import (
 	"fmt"
 	"math/rand"
 	"path/filepath"
-	"sort"
+	"slices"
+	"strings"
 	"time"
 
 	"github.com/syncthing/syncthing/lib/config"
@@ -1200,7 +1201,9 @@ func (f *folder) Errors() []FileError {
 	errors := make([]FileError, scanLen+len(f.pullErrors))
 	copy(errors[:scanLen], f.scanErrors)
 	copy(errors[scanLen:], f.pullErrors)
-	sort.Sort(fileErrorList(errors))
+	slices.SortFunc(errors, func(a, b FileError) int {
+		return strings.Compare(a.Path, b.Path)
+	})
 	return errors
 }
 
@@ -1341,7 +1344,7 @@ func unifySubs(dirs []string, exists func(dir string) bool) []string {
 	if len(dirs) == 0 {
 		return nil
 	}
-	sort.Strings(dirs)
+	slices.Sort(dirs)
 	if dirs[0] == "" || dirs[0] == "." || dirs[0] == string(fs.PathSeparator) {
 		return nil
 	}

lib/model/folder_recvenc.go

@@ -8,7 +8,8 @@ package model
 
 import (
 	"fmt"
-	"sort"
+	"slices"
+	"strings"
 
 	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/db"
@@ -112,7 +113,9 @@ func (f *receiveEncryptedFolder) revertHandleDirs(dirs []string, snap *db.Snapsh
 	go f.pullScannerRoutine(scanChan)
 	defer close(scanChan)
 
-	sort.Sort(sort.Reverse(sort.StringSlice(dirs)))
+	slices.SortFunc(dirs, func(a, b string) int {
+		return strings.Compare(b, a)
+	})
 	for _, dir := range dirs {
 		if err := f.deleteDirOnDisk(dir, snap, scanChan); err != nil {
 			f.newScanError(dir, fmt.Errorf("deleting unexpected dir: %w", err))

lib/model/folder_recvonly.go

@@ -7,7 +7,8 @@
 package model
 
 import (
-	"sort"
+	"slices"
+	"strings"
 	"time"
 
 	"github.com/syncthing/syncthing/lib/config"
@@ -207,7 +208,9 @@ func (q *deleteQueue) handle(fi protocol.FileInfo, snap *db.Snapshot) (bool, err
 
 func (q *deleteQueue) flush(snap *db.Snapshot) ([]string, error) {
 	// Process directories from the leaves inward.
-	sort.Sort(sort.Reverse(sort.StringSlice(q.dirs)))
+	slices.SortFunc(q.dirs, func(a, b string) int {
+		return strings.Compare(b, a)
+	})
 
 	var firstError error
 	var deleted []string

lib/model/folder_sendrecv.go

@@ -14,7 +14,7 @@ import (
 	"fmt"
 	"io"
 	"path/filepath"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"time"
@@ -1854,6 +1854,7 @@ func (f *sendReceiveFolder) moveForConflict(name, lastModBy string, scanChan cha
 		return nil
 	}
 
+	metricFolderConflictsTotal.WithLabelValues(f.ID).Inc()
 	newName := conflictName(name, lastModBy)
 	err := f.mtimefs.Rename(name, newName)
 	if fs.IsNotExist(err) {
@@ -1866,7 +1867,9 @@ func (f *sendReceiveFolder) moveForConflict(name, lastModBy string, scanChan cha
 	if f.MaxConflicts > -1 {
 		matches := existingConflicts(name, f.mtimefs)
 		if len(matches) > f.MaxConflicts {
-			sort.Sort(sort.Reverse(sort.StringSlice(matches)))
+			slices.SortFunc(matches, func(a, b string) int {
+				return strings.Compare(b, a)
+			})
 			for _, match := range matches[f.MaxConflicts:] {
 				if gerr := f.mtimefs.Remove(match); gerr != nil {
 					l.Debugln(f, "removing extra conflict", gerr)
@@ -2205,20 +2208,6 @@ type FileError struct {
 	Err  string `json:"error"`
 }
 
-type fileErrorList []FileError
-
-func (l fileErrorList) Len() int {
-	return len(l)
-}
-
-func (l fileErrorList) Less(a, b int) bool {
-	return l[a].Path < l[b].Path
-}
-
-func (l fileErrorList) Swap(a, b int) {
-	l[a], l[b] = l[b], l[a]
-}
-
 func conflictName(name, lastModBy string) string {
 	ext := filepath.Ext(name)
 	return name[:len(name)-len(ext)] + time.Now().Format(".sync-conflict-20060102-150405-") + lastModBy + ext

lib/model/folder_test.go

@@ -8,6 +8,7 @@ package model
 
 import (
 	"path/filepath"
+	"slices"
 	"testing"
 
 	"github.com/d4l3k/messagediff"
@@ -117,20 +118,11 @@ func unifySubsCases() []unifySubsCase {
 	return cases
 }
 
-func unifyExists(f string, tc unifySubsCase) bool {
-	for _, e := range tc.exists {
-		if f == e {
-			return true
-		}
-	}
-	return false
-}
-
 func TestUnifySubs(t *testing.T) {
 	cases := unifySubsCases()
 	for i, tc := range cases {
 		exists := func(f string) bool {
-			return unifyExists(f, tc)
+			return slices.Contains(tc.exists, f)
 		}
 		out := unifySubs(tc.in, exists)
 		if diff, equal := messagediff.PrettyDiff(tc.out, out); !equal {
@@ -146,7 +138,7 @@ func BenchmarkUnifySubs(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		for _, tc := range cases {
 			exists := func(f string) bool {
-				return unifyExists(f, tc)
+				return slices.Contains(tc.exists, f)
 			}
 			unifySubs(tc.in, exists)
 		}

lib/model/indexhandler_test.go

@@ -31,17 +31,17 @@ func TestIndexhandlerConcurrency(t *testing.T) {
 	ci := &protomock.ConnectionInfo{}
 
 	m1 := &mocks.Model{}
-	c1 := protocol.NewConnection(protocol.EmptyDeviceID, ar, bw, testutil.NoopCloser{}, m1, ci, protocol.CompressionNever, nil, nil)
+	c1 := protocol.NewConnection(protocol.EmptyDeviceID, ar, bw, testutil.NoopCloser{}, m1, ci, protocol.CompressionNever, nil)
 	c1.Start()
 	defer c1.Close(io.EOF)
 
 	m2 := &mocks.Model{}
-	c2 := protocol.NewConnection(protocol.EmptyDeviceID, br, aw, testutil.NoopCloser{}, m2, ci, protocol.CompressionNever, nil, nil)
+	c2 := protocol.NewConnection(protocol.EmptyDeviceID, br, aw, testutil.NoopCloser{}, m2, ci, protocol.CompressionNever, nil)
 	c2.Start()
 	defer c2.Close(io.EOF)
 
-	c1.ClusterConfig(&protocol.ClusterConfig{})
-	c2.ClusterConfig(&protocol.ClusterConfig{})
+	c1.ClusterConfig(&protocol.ClusterConfig{}, nil)
+	c2.ClusterConfig(&protocol.ClusterConfig{}, nil)
 	c1.Index(ctx, &protocol.Index{Folder: "foo"})
 	c2.Index(ctx, &protocol.Index{Folder: "foo"})
 

lib/model/metrics.go

@@ -57,6 +57,13 @@ var (
 		Name:      "folder_processed_bytes_total",
 		Help:      "Total amount of data processed during folder syncing, per folder ID and data source (network/local_origin/local_other/local_shifted/skipped)",
 	}, []string{"folder", "source"})
+
+	metricFolderConflictsTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: "syncthing",
+		Subsystem: "model",
+		Name:      "folder_conflicts_total",
+		Help:      "Total number of conflicts",
+	}, []string{"folder"})
 )
 
 const (
@@ -90,4 +97,5 @@ func registerFolderMetrics(folderID string) {
 	metricFolderProcessedBytesTotal.WithLabelValues(folderID, metricSourceLocalOther)
 	metricFolderProcessedBytesTotal.WithLabelValues(folderID, metricSourceLocalShifted)
 	metricFolderProcessedBytesTotal.WithLabelValues(folderID, metricSourceSkipped)
+	metricFolderConflictsTotal.WithLabelValues(folderID)
 }

lib/model/model.go

@@ -21,6 +21,7 @@ import (
 	"path/filepath"
 	"reflect"
 	"runtime"
+	"slices"
 	"strings"
 	stdsync "sync"
 	"sync/atomic"
@@ -1628,8 +1629,7 @@ func (m *model) sendClusterConfig(ids []protocol.DeviceID) {
 	// Generating cluster-configs acquires the mutex.
 	for _, conn := range ccConns {
 		cm, passwords := m.generateClusterConfig(conn.DeviceID())
-		conn.SetFolderPasswords(passwords)
-		go conn.ClusterConfig(cm)
+		go conn.ClusterConfig(cm, passwords)
 	}
 }
 
@@ -1804,12 +1804,10 @@ func (m *model) handleAutoAccepts(deviceID protocol.DeviceID, folder protocol.Fo
 		l.Infof("Failed to auto-accept folder %s from %s due to path conflict", folder.Description(), deviceID)
 		return config.FolderConfiguration{}, false
 	} else {
-		for _, device := range cfg.DeviceIDs() {
-			if device == deviceID {
+		if slices.Contains(cfg.DeviceIDs(), deviceID) {
 			// Already shared nothing todo.
 			return config.FolderConfiguration{}, false
 		}
-		}
 		if cfg.Type == config.FolderTypeReceiveEncrypted {
 			if len(ccDeviceInfos.remote.EncryptionPasswordToken) == 0 && len(ccDeviceInfos.local.EncryptionPasswordToken) == 0 {
 				l.Infof("Failed to auto-accept device %s on existing folder %s as the remote wants to send us unencrypted data, but the folder type is receive-encrypted", folder.Description(), deviceID)
@@ -2385,8 +2383,14 @@ func (m *model) scheduleConnectionPromotion() {
 // be called after adding new connections, and after closing a primary
 // device connection.
 func (m *model) promoteConnections() {
+	// Slice of actions to take on connections after releasing the main
+	// mutex. We do this so that we do not perform blocking network actions
+	// inside the loop, and also to avoid a possible deadlock with calling
+	// Start() on connections that are already executing a Close() with a
+	// callback into the model...
+	var postLockActions []func()
+
 	m.mut.Lock()
-	defer m.mut.Unlock()
 
 	for deviceID, connIDs := range m.deviceConnIDs {
 		cm, passwords := m.generateClusterConfigRLocked(deviceID)
@@ -2399,11 +2403,12 @@ func (m *model) promoteConnections() {
 			// on where we get ClusterConfigs from the peer.)
 			conn := m.connections[connIDs[0]]
 			l.Debugf("Promoting connection to %s at %s", deviceID.Short(), conn)
+			postLockActions = append(postLockActions, func() {
 				if conn.Statistics().StartedAt.IsZero() {
-				conn.SetFolderPasswords(passwords)
 					conn.Start()
 				}
-			conn.ClusterConfig(cm)
+				conn.ClusterConfig(cm, passwords)
+			})
 			m.promotedConnID[deviceID] = connIDs[0]
 		}
 
@@ -2412,12 +2417,19 @@ func (m *model) promoteConnections() {
 		for _, connID := range connIDs[1:] {
 			conn := m.connections[connID]
 			if conn.Statistics().StartedAt.IsZero() {
-				conn.SetFolderPasswords(passwords)
+				postLockActions = append(postLockActions, func() {
 					conn.Start()
-				conn.ClusterConfig(&protocol.ClusterConfig{Secondary: true})
+					conn.ClusterConfig(&protocol.ClusterConfig{Secondary: true}, passwords)
+				})
 			}
 		}
 	}
+
+	m.mut.Unlock()
+
+	for _, action := range postLockActions {
+		action()
+	}
 }
 
 func (m *model) DownloadProgress(conn protocol.Connection, p *protocol.DownloadProgress) error {

lib/model/model_test.go

@@ -17,7 +17,7 @@ import (
 	"os"
 	"path/filepath"
 	"runtime/pprof"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -1253,11 +1253,9 @@ func TestAutoAcceptPausedWhenFolderConfigChanged(t *testing.T) {
 	} else if fcfg.Path != idOther {
 		t.Error("folder path changed")
 	} else {
-		for _, dev := range fcfg.DeviceIDs() {
-			if dev == device1 {
+		if slices.Contains(fcfg.DeviceIDs(), device1) {
 			return
 		}
-		}
 		t.Error("device missing")
 	}
 
@@ -1302,11 +1300,9 @@ func TestAutoAcceptPausedWhenFolderConfigNotChanged(t *testing.T) {
 	} else if fcfg.Path != idOther {
 		t.Error("folder path changed")
 	} else {
-		for _, dev := range fcfg.DeviceIDs() {
-			if dev == device1 {
+		if slices.Contains(fcfg.DeviceIDs(), device1) {
 			return
 		}
-		}
 		t.Error("device missing")
 	}
 
@@ -2776,6 +2772,7 @@ func TestIssue4903(t *testing.T) {
 	fcfg := config.FolderConfiguration{
 		ID:             "folder1",
 		Path:           folderPath,
+		FilesystemType: config.FilesystemTypeBasic,
 		Paused:         true,
 		Devices: []config.FolderDeviceConfiguration{
 			{DeviceID: device1},
@@ -2972,7 +2969,7 @@ func TestConnCloseOnRestart(t *testing.T) {
 	nw := &testutil.NoopRW{}
 	ci := &protocolmocks.ConnectionInfo{}
 	ci.ConnectionIDReturns(srand.String(16))
-	m.AddConnection(protocol.NewConnection(device1, br, nw, testutil.NoopCloser{}, m, ci, protocol.CompressionNever, nil, m.keyGen), protocol.Hello{})
+	m.AddConnection(protocol.NewConnection(device1, br, nw, testutil.NoopCloser{}, m, ci, protocol.CompressionNever, m.keyGen), protocol.Hello{})
 	m.mut.RLock()
 	if len(m.closed) != 1 {
 		t.Fatalf("Expected just one conn (len(m.closed) == %v)", len(m.closed))
@@ -3631,11 +3628,11 @@ func testConfigChangeTriggersClusterConfigs(t *testing.T, expectFirst, expectSec
 	cc1 := make(chan struct{}, 1)
 	cc2 := make(chan struct{}, 1)
 	fc1 := newFakeConnection(device1, m)
-	fc1.ClusterConfigCalls(func(_ *protocol.ClusterConfig) {
+	fc1.ClusterConfigCalls(func(_ *protocol.ClusterConfig, _ map[string]string) {
 		cc1 <- struct{}{}
 	})
 	fc2 := newFakeConnection(device2, m)
-	fc2.ClusterConfigCalls(func(_ *protocol.ClusterConfig) {
+	fc2.ClusterConfigCalls(func(_ *protocol.ClusterConfig, _ map[string]string) {
 		cc2 <- struct{}{}
 	})
 	m.AddConnection(fc1, protocol.Hello{})
@@ -4094,8 +4091,8 @@ func equalStringsInAnyOrder(a, b []string) bool {
 	if len(a) != len(b) {
 		return false
 	}
-	sort.Strings(a)
-	sort.Strings(b)
+	slices.Sort(a)
+	slices.Sort(b)
 	for i := range a {
 		if a[i] != b[i] {
 			return false

lib/model/queue.go

@@ -7,7 +7,8 @@
 package model
 
 import (
-	"sort"
+	"cmp"
+	"slices"
 	"time"
 
 	"github.com/syncthing/syncthing/lib/rand"
@@ -157,40 +158,34 @@ func (q *jobQueue) SortSmallestFirst() {
 	q.mut.Lock()
 	defer q.mut.Unlock()
 
-	sort.Sort(smallestFirst(q.queued))
+	slices.SortFunc(q.queued, func(a, b jobQueueEntry) int {
+		return cmp.Compare(a.size, b.size)
+	})
 }
 
 func (q *jobQueue) SortLargestFirst() {
 	q.mut.Lock()
 	defer q.mut.Unlock()
 
-	sort.Sort(sort.Reverse(smallestFirst(q.queued)))
+	slices.SortFunc(q.queued, func(a, b jobQueueEntry) int {
+		return cmp.Compare(b.size, a.size)
+	})
 }
 
 func (q *jobQueue) SortOldestFirst() {
 	q.mut.Lock()
 	defer q.mut.Unlock()
 
-	sort.Sort(oldestFirst(q.queued))
+	slices.SortFunc(q.queued, func(a, b jobQueueEntry) int {
+		return cmp.Compare(a.modified, b.modified)
+	})
 }
 
 func (q *jobQueue) SortNewestFirst() {
 	q.mut.Lock()
 	defer q.mut.Unlock()
 
-	sort.Sort(sort.Reverse(oldestFirst(q.queued)))
+	slices.SortFunc(q.queued, func(a, b jobQueueEntry) int {
+		return cmp.Compare(b.modified, a.modified)
+	})
 }
-
-// The usual sort.Interface boilerplate
-
-type smallestFirst []jobQueueEntry
-
-func (q smallestFirst) Len() int           { return len(q) }
-func (q smallestFirst) Less(a, b int) bool { return q[a].size < q[b].size }
-func (q smallestFirst) Swap(a, b int)      { q[a], q[b] = q[b], q[a] }
-
-type oldestFirst []jobQueueEntry
-
-func (q oldestFirst) Len() int           { return len(q) }
-func (q oldestFirst) Less(a, b int) bool { return q[a].modified < q[b].modified }
-func (q oldestFirst) Swap(a, b int)      { q[a], q[b] = q[b], q[a] }